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3-D Object 1

Aim:

To make a three dimensional design of the given object.

Procedure:

1. Open the application from your desktop. Then click start and go to mechanical design to select part design. Here, the window shows three different axes (x, y, and z, respectively).

2. Select the yz plane and click on the sketch button. Now the window falls down to the yz plane where you are free to draw your design.

3. Click on the polyline feature on the application and create your basic frontal view of the bottom rectangle with dimensions 20 x 90.

4. Then draw with another polyline the partition of 10 x 10 as shown on the measurement sheet.

5. Use the trim option on the erase option to remove the other part of the line attached to the design. Now you have the base done.

6. Exit workbench and pad the drawing that was just made and pad it to an extent of 50 units.

7. Click on the top portion of the design on the xy plane and click sketch. Here you may draw a rectangle of dimensions 40 x 50 correlating to the edges of the bigger base rectangle.

8. Make sure the dimensions of all the drawings are mentioned properly as those would fix the drawings to the plane indicated by a green highlighted colour. This can be done by using the constraint command.

9. Exit the workbench and use the option of reference plane to create a reference plane 60 units above the yz axis.

10. Here draw the top portion of your design measuring 20 x 20. Now exit the work bench again.

11. Use the command of multi-section solids and select the two drawings of 20 x 20 and 50 x 40 and bring them together. If your drawing appears twisted, it basically means that the directions of the closing points are not correlated. To have this correlation done, you need to replace the closing point on either diagram to the correct correlated location. This can be done by right clicking the sketch on the multi-sections solid window and choosing the option of replacing the closing point.



12. Now make the elongated hole diagram on the other side of the diagram. Choose the right measurements and ensure that all the dimensions are under constraint. After drawing the elongated hole, exit the workbench.

13. You may notice that this diagram you just drew on the surface of the rectangular solid is highlighted in orange. Choose the option of pocket and make a hole through the elongated hole diagram

14. Your diagram is now finished and ready for further applications.

Result:

The three dimensional design of the given object is done according to the procedure.



3-D Object 1

Aim:

To make a three dimensional design of the given object.

Procedure:



3. Start the design by drawing the two circles of 25 and 50 radii respectively. Use a polyline to limit their lengths and to connect them. Use constraint to fix them to the location and the plane.

4. Exit the workbench and pad the figure to 70 mm. Now click on the xy plane and get onto sketch.

6. Now design the two other part of the design where you make a rectangle of 50 x 30. It would be better if you take the 30 as 40 where 10 units will be projected into the original design. The remaining 30 units would make up your design. Here you need to constraint it with respect to the axis and the original radii design.

7. Use the circle option to make the outer circle of radius 25 and an inner circle of diameter 16 on the centre of the outer line of the rectangle. Then trim or erase the excess line.

8. You can save time in this process by mirroring the image onto the other side of the axis by the mirror option. This ensures you that you need not redo the basic figure on the other side of the diagram and saves a lot of time. Exit the workbench and pad the two sides of the design by 18 units.

10. It’s time to drill the hole on top of the diagram and this can be done by using the hole command found in the software. After you choose the hole command, it is suggested that you click on the location of the desired figure on the product. This can be done by clicking anywhere on the top view of the product over the top part of the arc of the product. Now, choose the option to position the hole with respect to the plane that can be found in the hole command window. Position the hole with the correct dimensions to the centre of the graph or the product and then rill the hole with the given diameter.

Result:

The three dimensional design of the given object is done according to the procedure.



3. 3 Dimensional Design of Typical Wing Structure

Aim:

To make a three dimensional design of the wing of an aircraft.

Procedure:



3. Import the specific file of the aerofoil from the given word document which contains a pre-programmed measurements and dimensions installed in it. After importing, you have the cross sectional view of the wing or commonly known as the aerofoil.

4. You need to use this diagram to draw your further elements of the aerofoil (the circles and rectangles as shown in the design sheet). Ensure that proper dimensioning is given on these elements of two dimensions by using constraints.

5. Exit the workbench and select the reference plane option. Add a reference plane 100 units away from the original reference plane. Now go back to the first plane and copy the two dimensional figure onto the second plane that you just referenced 100 units away.

6. Similarly make 6 other planes 100 units away from each other and ensure that the figure is copied onto the third and the fourth plane alone. Ensure that the total planes with the figure would only be the first four planes.

7. Now copy the same figure onto the fifth plane but here, you need to additionally change the scaling of the plane. You can do that by using the scale option from the operation toolbar. Here you can select the scaling of the model. You need to decrease the size of the aerofoil from this plane onwards, so select the scaling to be 0.9 times the original size.

8. Exit the workbench and do a similar scaling for the sixth plane at 0.8 factor of scaling.

9. Exit the workbench and do a similar scaling for the seventh plane at 0.7 factor of scaling

10. Exit the workbench and do a similar scaling for the eighth plane at 0.6 factor of scaling

11. Exit the workbench and now it is time for padding of the aerofoils. Select the pad command from the sketch based features toolbar in the window and pad the aerofoil on the first plane with


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a depth of 5 units. Pad the second plane’s aerofoil with the same width. Similarly continue padding all 8 of the planes.

12. It is now time to make a wing tip in order to decrease the vortices of the flow. This can be done by using another reference plane from the eighth plane by a 100 units. Here copy the same aerofoil structure and scale it down to 0.2 of the scaling factor. Also pad this aerofoil also by 5 units of width.

13. It is now time to make the iron frame structure between the aerofoils in the frame. This can be done by using the multi-sections solid command from the sketch based features toolbar and the projection of 3D elements command from the operations toolbar in the two dimensional view of the sketch.

14. You need to use this projection of three dimensional elements command to add a reference element in each of the sketch. Start with the plane 9 with the aerofoil of scaling 0.2 and move up the plane until plane 5. This has to be achieved by only using the rectangular elements of the aerofoil cross sectional views.

15. After all the elements have been projected from plane 9 to plane 4 of both the rectangles in each plane; you need to use the multi-sections solid command from the sketch based features toolbar to make the frame between those white highlighted elements that have been the output of the previous step.

16. Now you need to do a similar procedure of projecting the rectangles of plane 4 and plane 1 alone and connect the frames of plane four to plane 1 using the multi-sections solid command from the sketch based features toolbar. After this procedure, you may have the basic framework of an aircraft wing done and it is now the time for the surface creation.

17. Use the same command of projection of 3D elements command from the operations toolbar in the window and select the aerofoils planes (just the outer structure) of every plane and for both the top and the bottom sections of the aerofoils in every plane. Now use the command of multi-sections surface command to make a surface between every aerofoil in every plane. Ensure that this surface is done both on the top and the bottom side of the wing. Now your wing of the aircraft is finished.

Result:

The three dimensional design of the wing of an aircraft is completed with respect to the procedure given.

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Sai Nandyala - 1191310067 12

5. 3 Dimensional Design of landing gear componentsThe landing gear of an aircraft can be achieved by designing the following components:

a. Heavy Flange Nutb. Heavy Hex Flange Screwc. Lower Sway Linkd. Pistone. Shaftf. Strutg. Upper Sway Linkh. Wheel Hubi. Wheel

Heavy Flange NutAim:

To make the heavy flange nut for the assembly of the landing gear

Procedure:

1 Open the application from your desktop. Then click start and go to mechanical design to select part design. Here, the window shows three different axes (x, y, and z, respectively).

2. Select the xy plane and click on the sketch button. Now the window falls down to the yz plane where you are free to draw your design.

3. Make the general shape of a pentagon with equal side lengths using lines and circles on the sketch plane of xy.

4. Exit the workbench and pad the pentagon to 16 units. Now from one side of the pentagon, make a sketch on the surface (either top or bottom of the pentagon) of a circle of diameter 21.

5. Now you need to pad this circle out the pentagonal prism to a depth of about 4 units.

6. It is time to chamfer the rough surfaces on the cylinder’s two ends (the one attached to the prism and the other end). The chamfer command lets you select this process and chamfer it at a radius of about 1.08 units.

7. Now drill a hole of diameter 14 and a depth of about 18.54 units.

Result:

The heavy flange nut is made and sent for assembly.

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Sai Nandyala - 1191310067 14

Heavy Hex Flange ScrewAim:

To make the heavy hex flange screw for the assembly of the landing gear

Procedure:



3. Make the general shape of a pentagon with equal side lengths using lines and circles on the sketch plane of xy.

4. Exit the workbench and pad the pentagon to 16 units. Now from one side of the pentagon, make a sketch on the surface (either top or bottom of the pentagon) of a circle of diameter 21.

5. Now you need to pad this circle out the pentagonal prism to a depth of about 4 units.

6. It is time to chamfer the rough surfaces on the cylinder’s two ends (the one attached to the prism and the other end). The chamfer command lets you select this process and chamfer it at a radius of about 1.08 units.

7. Now it’s time to project the screw section of the hex flange and this can be done by projecting a two dimensional circle on the bottom of the screw head with a diameter of 14 units.

8. Pad this section outwards from the screw head to about a 100 units.

9. Use the edge fillet command to chamfer a length of 1.1 units on the bottom of the screw section at an angle of 45 degrees.

10. The heavy hex flange screw is now completed

Result:

The heavy hex flange screw is made and sent for assembly.

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Sai Nandyala - 1191310067 16

Lower Sway LinkAim:

To make the lower sway link for the assembly of the landing gear

Procedure:



3. Make the basic outline of the structure using the polyline command and use proper dimensioning using constraints. Make sure the entire design is highlighted in green in order to ensure that the diagram is fixed to the plane. The sample diagram is shown below.

4. Exit the workbench and pad the design to a depth of 25 units onto the axis. Now take the side views and make a semi-circle of radius 12.5 units on all three ends of the lower sway link. Make sure that the remaining portion of the designs are trimmed off and constraint the semi-circle to an appropriate dimension. Ensure that the three semi-circles are fixed.

5. Now, pad the frontal circle to a depth of 20 units to corresponding to the basic design shown in the diagram.

6. Pad the other two semi-circles as well to a depth of 15 on the left side edges of the diagram. Ensure that the padding is properly done. After this step, you will have your structure of the lower sway link almost completed.

7. To finish it, it is time for drilling of the holes where the heavy hex flange screws will be positioned in. These holes must be of a diameter of 15 units and should be positioned corresponding to the three semi-circular paddings.

8. The lower sway link is now completed.

Result:

The lower sway link is made and sent for assembly.

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Sai Nandyala - 1191310067 18

PistonAim:

To make the piston for the assembly of the landing gear

Procedure:



3. This piston is a very simple one to make. Begin by making a circle of diameter 70 on the plane. Ensure that the proper constraints are followed by dimensioning the figure. Also ensure that the diagram is fixed and is highlighted green.

4. Exit the workbench and pad this circle to a depth of 14.5 units making a cylinder. After this, it is time to project the screw section of the piston.

5. This second section can be done by first choosing a base section of the cylinder and selecting the option of sketch on this base. Then, make a circle of diameter of 45 units. Exit the workbench and pad this circle to a distance of 365 units on the three dimensional view of the part.

6. Now you have your piston ready and sent for assembly.

Result:

The piston is made and sent for assembly.

ShaftAim:

To make the shaft for the assembly of the landing gear

Procedure:



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Sai Nandyala - 1191310067 20

3. Start by making a circle of diameter of 40 units on the plane and ensure that the dimensioning is done and that the figure is highlighted green.

4. Pad this circle onto the three dimensional window by 333.85 units. Then, make a reference plane from the base circle plane up by 10.92 units. On this new plane, make a circle of diameter 12.41 units.

5. Similarly make another reference plane and create another circle on the other end of the shaft and ensure that proper dimensioning is done and that the constraints are set.

6. Use the option of multi-sections solid under the sketch based features toolbar to combine the base circle of 40 units and that smaller circle that is of diameter 12.41 units and 10.92 units away from both the circles of the top and the bottom of the shaft. This option further connects the three planes and the next step can be reached.

7. Now use an edge fillet command to smoothen out the edge on the smaller circles by a radius of 10 unit fillet. Now the shaft is done and ready for assembly.

Result:

The shaft is made and sent for assembly.

StrutAim:

To make the strut for the assembly of the landing gear

Procedure:



3. Start by making a circle of diameter of 100 units on the plane and ensure that the dimensioning is done and that the figure is highlighted green.

4. Then pad this circle to a length of 30 units onto the third axis. Now from the bottom side of this cylinder sketch a circle of diameter 90 units using the sketch surface command. Make sure this circle is also constraint and pad this outward by 50 units.

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Sai Nandyala - 1191310067 22

5. From the bottom of the cylinder with the length of 50 units depth, sketch a circle on the surface with diameter of 80 units and pad this outward onto the other axis at a length of 320 units.

6. Now from the top of the cylinder draw the upper portion of the strut using polyline and circle commands like the figure shown. Ensure that this is done from the middle axis of the cylinder.

7. Ensure that the proper constraints are used and dimensioned in a way where all the elements of this design are fixed with respect to the reference axis. After this design is done, it is needed to pad this figure using a mirrored option of 15 units on either side of the figure.

8. Now drill a hole of diameter 20 units and a depth in such a way that it goes through the figured padding. This hole must have its centre offset of 0 units from the centre of the bigger circle of radius 20 units as shown in the figure.

9. Now make the two parts in the middle of the strut where each part is displaced by 15 units on either side. Ensure that these two parts are properly dimensioned and properly planed according to the reference plane. The reference plane should be taken to finish this section with the units of 15 on either side of the axis. After the design has been done on one of the sections and the proper padding is given with the length of 15 units, you may use the mirror option across the axis to make a similar section on the other side of the displaced 30 units away from this first section.

10. After the middle section is done, drill a hole of diameter 30 units with its centre offset at a distance of 0 units from the centre of the 25 unit radius circle which is over the drilled hole. Do this hole on both sections that were made in the previous step. Here, the upper sway link part is fixed during the assembly.

11. It is now needed to make the bottom side sections of the strut as shown below

Here, you need to ensure that proper dimensioning is done in such a way that constrains fix the object to the figure and highlight the part in green as shown (partially). Now you need to mirror this to the other side of the strut by using the mirror option.

12. After the mirroring is done, it is needed to pad this figure at a length of 10 units on both of the sides using mirrored extent option. Ensure that the hole is also drilled with a radius of 7.5 units. Also ensure that you leave some gap into the strut so that rough edges cannot be a problem in the assembly.

13. Now from the bottom of the entire strut, drill a hole of diameter of 70 units at a depth of 380 units in length. Next from the same bottom of the strut make a circle of diameter of 80 units and make sure you pad in such a way that it closes the drilled hole of diameter 70 units through the strut at a length of 5 units. Now from the surface of this cylinder which encloses the drilled hole, you need to drill another hole of diameter 45 units with the centre of this hole corresponding to the centre of the strut.

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Sai Nandyala - 1191310067 24

14. This finishes the strut and is sent for assembly.

Result:

The strut is made and sent for assembly.

Upper Sway LinkAim:

To make the upper sway link for the assembly of the landing gear

Procedure:



3. Begin by using the polyline feature command to make the general shape of the upper sway link, and then make the inner section with the radius of 11 units in the corners using the command of edge fillet found in the window. Ensure that all the parallel laws are followed and excess elements are cut or trimmed off from the figure. Ensure that the dimensioning is done by using the constraint option found in the window and that all the elements of the figure are fixed with respect to the reference axis and are highlighted in green.

4. Pad the figure in a way that the thickness measures 25 units and do this by the pad option found in the three dimensional view of the designing window. To reach this view, exit the workbench of two dimensional sketch view.

5. Use the option of edge fillet on all the rectangular blocks (4 of them) where only the upper and the lower edges are filleted as shown in the diagram with a circle of radius 12.5 units.

6. Now drill the holes on each of the semi-circular sections of the part with a diameter of 15 units. All the four sections must have this hole drilled with the centre of the hole corresponding to the centre of the semi-circle.

7. Now the upper sway link is ready for the assembly process.

Result:

The upper sway link is made and sent for assembly.

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Sai Nandyala - 1191310067 26

Wheel HubAim:

To make the wheel hub for the assembly of the landing gear

Procedure:



3. Start first by making a circle of diameter 80 units and padding this out with the pad command of length 60 units. Ensure that before padding, this circle is properly positioned and dimensioned according to the reference axis of x and y in order to stay fixed in position.

4. From the centre plane of this cylinder and from the bottom of the cylinder by a distance of 40 units, draw a circle of diameter 40 units and a bigger circle of diameter 55 units. After the two circles are done, pad this figure using the pad command and ensure that the mirrored extent option is checked and pad it at a length of 60 units.

5. Now make the two sides of the wheel hub as shown in the above diagram using the options of polyline and circle. Trim the excess elements and ensure that the figure is constraint with appropriate dimensions and is referenced with respect to the axis. Ensure that proper position is maintained on the cylinder. Then Pad this part with the help of pad command and mirrored extent to a length of 15 units on either side of the part. Also, you can use the mirror option available to make things easier.

6. Now make the holes on both the sections that were designed in the previous step with a hole diameter of 16 units positioned with respect to the corresponding centres of the original semi-circles on the sections.

7. Next, make a sketch of a circle of diameter of 45 units on the top of the cylinder and drill it down to a depth of 20 units through the axis of the cylinder.

8. Now your wheel hub is done and sent for the assembly.

Result:

The wheel hub is made and sent for assembly.

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Sai Nandyala - 1191310067 28

WheelAim:

To make the wheel for the assembly of the landing gear

Procedure:



3. Begin first by making the rim portion of the wheel with appropriate dimensioning and proper constraints in a way where they are referenced with respect to the axis. It would be better if only half the rim is done on either side of the horizontal axis and mirrored to the other side with respect to the horizontal axis or the x axis.

4. After the two dimensional rim element is finished from the previous step, you need to exit the workbench and use the shaft command on this two dimensional element with respect to the vertical axis and revolve it thorough it. This makes the three dimensional rim of the landing gear wheel. Next, make the tire.

5. To make the tire portion of the wheel, choose the xy plane and place a sketch feature on this. Along the outer surface of the rim, make the cross sectional view of the tire like the one shown below.

6. Ensure that proper dimensions are placed along with the grooves of the tire. Include a curvature of the tire of radius 2 units to smoothen out the edges of the tires. Ensure that the values of the dimensions are correct and use a mirror option to make things easier. Also, ensure that the whole part is fixed with respect to the axis using the constraint option.

7. Exit the workbench and shaft this cross sectional view of the tire along the vertical axis and around the three dimensional rim that was previously made. You may also colour the outer surface of the tire black under the surface properties by right clicking the surface of this tire. This adds a feel of texture to the wheels and makes the viewer easily recognize its significance.

8. Now, make the holes on the rims as shown in the paper attached where it is required using a hole option and the circular pattern found on the window of the three dimensional view of the figure. Make sure that the holes are properly dimensioned and measure a diameter of 6 units along with the positioning of 25 units from the centre of the tire to the centre of the hole drilled. The circular pattern command lets you draw or drill multiple holes with certain specifications on the positioning along the rim with a user friendly interface.

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Sai Nandyala - 1191310067 30

9. After this step is done, your wheel is ready and it is sent for assembly.

Result:

The wheel is made and sent for assembly.

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Sai Nandyala - 1191310067 32

6. Landing Gear Assembly

Aim:

To assemble the parts of the landing gear that was done in the previous experiment into the landing gear of the aircraft.

Procedure:

1. Start by opening the assembly design under mechanical design of the CATIA software

2. Here you need to only use the toolbars of constraints, move, update, and product structure tools commands. Begin with the wheel hub. Use the option of “existing component with positioning” under product structure tools toolbar. Select the wheel hub component and bring it onto the interface. Make sure you fix this part onto the interface. This part will be our reference part for the entire landing gear. From here, you may either move on to the wheel section or the strut and piston section. Both are equally time consuming. Let’s begin with the wheel section.

3. Use the option “existing component” under the product structure tools toolbar to bring in the shaft onto the interface. You can modify this position using the manipulation option. You need to make a coincidence constraint between the central axis of the shaft to the hole going through the wheel hub. Make sure that equal lengths of the shaft are displaced from either side of the wheel hub. This can be done by using offset constraint. Now once you have this constraints placed, the part is fixed to the wheel hub. Now move onto the wheels.

4. Use the same option to import the wheel from the folder onto the interface and with the help of coincidence constraint, coincide the axis of the wheel to the shaft. Make sure you do this to four wheels on the shaft (two on either side of the shaft). Select the rim of each of the wheel and use the option of “fix together” with the shaft so that when the wheel rotates along its axis, the shaft also rotates. Ensure that this option is done on all the four wheels. Displace the wheels in a way where they don’t collide.

5. Now bring in the piston from the folder onto the interface by importing. Make a coincidence constraint between the axis of this piston and the axis of the cylindrical wheel hub in a way perpendicular to the shaft and the wheel section of the wheel hub. Ensure that the bottom piston surface is under a contact constraint with the small slot section on the wheel hub so that it remains fixed there. Now you can bring in the strut.

6. The strut should be imported onto the interface. Ensure that a coincidence constraint is made in a way where the axis of the piston and the axis of this strut are coinciding. Also check the option of crash on contact between the piston head and the strut. The assembly of the piston and strut should be in such a way that the piston head should be deployed into the strut’s body. As you manipulate the strut up and down its axis, it should move and should stop moving when the

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Sai Nandyala - 1191310067 34

impact of the piston head is met in the interior of the strut. Also rotate the strut and make an angle coincidence with the wheel hub in such a way that the upper and the lower sway links can be placed anytime in the interface.

7. Now bring in the lower sway link where this part will be attached partially to the wheel hub and partially to the upper sway link. Ensure a coincidence constraint between the hole axis of the lower sway link and the hole axis of the wheel hub base. Also make an offset constraint between the surface of the holes of both the lower sway link and the wheel hub at a distance of 0 units. This means that it is almost in contact without the need of the contact constraint with the wheel hub.

8. Now bring the upper sway link which will be attached to the strut and the lower sway link. Also the diagram shown above doesn’t show the sway links. It is best referred from the attached document. The upper sway link must be set with a coincidence constraint with the strut’s holes. The offset constraint must also be maintained between the surfaces of the holes of the upper sway link and the strut’s holes. This offset must be at a distance of zero units. After this coincidence, make another coincidence constraint connecting the two upper and the lower sway links together as shown in the document attached. Ensure that when moving the strut, these sway links also move with respect to the strut movement along the central axis of the strut.

9. Bring in the heavy hex flange screws into the interface with the import option. There are three locations as to where this heavy hex flange screws are positioned. These three locations correspond to the three junctions of the upper and lower sway links with respect to themselves and to the strut and wheel hub. Make sure a coincidence constraint is maintained in a way where the axis of the three heavy hex flange screws coincides with the holes in the junctions. Also make a contact constraint with the heads of the heavy hex flange screws and the surface of the holes on the landing gear at the junctions.

10. Now bring in the heavy hex flange nuts which will be placed in a way where they fit in with heavy hex flange screws at the three terminals or the junctions. The nuts must be positioned with a coincidence constraint with the heavy hex flange screws. There should also be a contract constraint with all three nuts and the open surfaces of. This positions the screws and provides rigidity to the structure

11. Ensure that all the constraints are followed along with the procedures. Your landing gear is completed

Result:

The landing gear assembly is completed with the help of all the parts.

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Sai Nandyala - 1191310067 36

7. Aircraft Assembly

Aim:

To assemble the parts of the aircraft given to you and to finish the model of an aircraft.

Procedure:

1. There are three files given to you on your folder which include the main structure of the aircraft, a left wing and a right wing. You need to assemble these three parts together and send it for further processes like drafting.

2. Start by opening an assembly design interface under mechanical design of the CATIA software. Import the file of the main aircraft structure and fix it with respect to the interface and the plane.

3. Import the file of left wing onto to the window. Here you can notice that the wing has holes or the frame of the wing is can coincide with the aircraft. The aircraft is a high wing aircraft. Here you need to use three constraints. Two coincidence constraints and one contact constraint are to be made. Make two coincidence constraints with respect to the circles on the wing’s cross-sectional view corresponding to the ones found on the aircraft. After you finish this constraint, make a contact constraint between the surface of the aircraft and its corresponding wing’s cross sectional area. Your left wing is completed and the only thing remaining is the right wing.

3. Import the file of right wing onto to the window. Here you can notice that the wing has holes or the frame of the wing is can coincide with the aircraft. The aircraft is a high wing aircraft. Here you need to use three constraints. Two coincidence constraints and one contact constraint are to be made. Make two coincidence constraints with respect to the circles on the wing’s cross-sectional view corresponding to the ones found on the aircraft. After you finish this constraint, make a contact constraint between the surface of the aircraft and its corresponding wing’s cross sectional area. Your right wing is also completed.

4. Your aircraft assembly is completed in these simple steps and is sent for drafting

Result:

The assembly of a simple aircraft is completed and is sent for drafting.

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Sai Nandyala - 1191310067 38

8. 3 Dimensional Design of Blower ComponentsThe blower designing can be achieved by first designing the following components:

a. Blowerb. Coverc. Lower Housingd. Motore. Shaftf. Upper Housing

BlowerAim:

To make the blower for the assembly of the blower

Procedure:



3. Start by making a circle with a diameter of 100 units on the plane. Pad it out onto the third axis at a distance of 36.25 units.

4. Next you mush pocket out the middle region of this cylinder with the dimensions shown in the diagram provided at a distance of 27.5 units on one side and 30 units on the opposite side.

5. Now from the bottom sectional view of the thinner cylinder, draw a circle of diameter of 80 units and drill that diameter of a hole through the bottom section.

6. Now make the fences on the circumference of the cylinder with a width of 2.5 units and a length of 24.8 units from the circumference of the cylinder section towards the central axis of the cylinder section. Then, use circular patter command to organize them into six pieces throughout the circumference of the cylinder.

7. Pad this region out onto the top cylinder so that the outer fenced structure of the blower is made.

8. From the top view of the top cylinder, make two circles with diameters 15 and 30 units respectively. Their centres and the centre of the cylinder must coincide. Now exit the workbench

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Sai Nandyala - 1191310067 40

and pad this surface outward to a distance of 25 units. Ensure that all the constraints are met and that the figure is fixed with respect to its axis.

9. Your blower is finished and ready for assembly.

Result:

The blower component is finished and sent for assembly.

CoverAim:

To make the cover for the assembly of the blower

Procedure:



3. Start by making a circle of diameter 70 units on the plane. Pad this figure out onto the other axis at a distance of 25 units.

4. From one side of the cylinder, make an edge fillet of radius 10 units to give a smooth surface to it.

5. Now use the shell command to make a shell from the design with a displacement of 2.5 units in thickness.

6. Now from the top sectional view of the figure, make an elongated hole with the central axis of the elongated hole corresponding to one of the axis of the figure through its centre. Make the elongated distance of 40 units and a hole diameter of 3.5 units on either side. Also Make six more of such elongated holes where three of them are on either side of the hole. The length or distance between each elongated hole must be 1.75 units.

7. Then, pocket out the holes made in the previous step in a way that they make 7 elongated holes on the top view of the component.

Sai Nandyala - 1191310067 41

Sai Nandyala - 1191310067 42

8. Going back onto the surface of the figure, make two circles corresponding to the centre of the cylinder with diameters 15 and 25 units respectively. Then pad these outward in a length of 7.5 units. Your top section of the component is done.

9. Now from the bottom rim of the cover, make your side part with a semicircle radius of 7.5 and the smaller circle diameter of 7.5 units. Ensure that the centres of these circles are at a length of 42.5 units from the axis of the component.

10. Use the option of circular pattern in order to make two more such shapes around the rim at an angle of 120 degrees apart from each centre.

11. Now pad these figures to a distance of 5 units and your cover of the blower is done and sent for assembly.

Result:

The cover component is finished and sent for blower assembly.

Lower HousingAim:

To make the lower housing for the assembly of the blower

Procedure:



3. Start the entire design by first making the basic shape of the structure as shown below. Ensure that the base is given as 140 units length of 15 units as height. Ensure that the semi-circle drawn is at a radius of 60 units. Also ensure that the side portions of the semi-circle are also drawn and measure a length of 14 units.

4. Now, exit the workbench and pad this image at a distance of 40 units onto the third axis. Next, you need to make the holes on the side rectangular sections (four on each side, so eight of them) Make sure they all measure the same units and are the same distance apart from each other. These holes correspond to the holes made in the upper housing given in this document. Ensure that the radius of these holes are 4.1 units divided by 2.

Sai Nandyala - 1191310067 43

Sai Nandyala - 1191310067 44

5. Next with the side view of the semi-circular solid, make another semi-circle with a radius of 57 units corresponding to the central axis of the bigger semi-circle. Then pocket this image into the solid at a distance of 37.5 units.

6. Next make the smaller semi-circular slit on one side with a radius of 15 units and drill through the wall. Then make a semi-circle of radius 48.75 units and the base line 2.5 units away from the base of the bigger semi-circular wall.

7. Your lower housing is done and sent for assembly.

Result:

The lower housing component is finished and sent for blower assembly.

MotorAim:

To make the motor for the assembly of the blower

Procedure:



3. Start with a circle of diameter 70 units on the plane. Then pad this out onto the interface in the third axis at a distance of 90 units.

4. Next make the base structure by taking one face of the cylinder. The bottom distance of the base should be 120 units long with a vertical distance of 67.5 units from the centre of the face central horizontal axis. Ensure that the base is symmetric about the y axis or the central axis of the face of the cylinder.

5. Pad this design at a distance of 65 units as shown in the figure. Next make the upper section of the motor which looks like steps. To do this section, first stake the face without the base connected and draw your steps. Ensure that the Edges are coinciding with the face of the motor cylinder and that the bottom most base is at a distance of 28 units from the central axis of the cylinder as show. Each displacement of the steps should by 4.5 units both in vertical and horizontal distances.

Sai Nandyala - 1191310067 45

Sai Nandyala - 1191310067 46

6. Pad this step structure at a length of 82.5 units. Now make the bigger circle with a diameter of 100 units with the centres offset at a distance of 0 units from the centre of the cylinder already made. Then pad this structure away from the cylinder at a distance of 5 units.

7. From the Surface of the previous padding, make another circle of diameter 60 units colliding with the centres again. This circle should be pocketed inward at a distance of 5 units.

8. From the middle section of the cylinder make a hole of diameter 15 units through the motor. Next, make the holes of circular pattern around the plate as shown with diameters of 7.5 units and each hole should be 120 degrees apart from each other with respect to the centre of the cylinder.

9. Your motor is done and ready for assembly.

Result:

The motor component is finished and sent for blower assembly.

ShaftAim:

To make the shaft for the assembly of the blower

Procedure:



3, Begin by making a circle with a diameter of 15 units and then pad this circle to a length of 240 units onto the third axis. Ensure that the proper dimensions are taken and the figure is constraint properly and highlighted green.

4. From one of the faces of this cylinder use the sketch option to make a circle of diameter 12 units with the centres of the cylinder and this circle corresponding. This circle further needed to be padded at a distance of 1.8 units. Now from the outward face of this smaller cylinder draw another circle.

Sai Nandyala - 1191310067 47

Sai Nandyala - 1191310067 48

5. This third circle must have the same measurements as the first circle as in it should have a diameter of 15 units. This circle should also be padded at a distance of 5 units onto the third axis. Ensure that constraints are followed.

6. Your shaft is done and sent for assembly.

Result:

The shaft component is finished and sent for blower assembly.

Upper HousingAim:

To make the upper housing for the assembly of the blower

Procedure:



3. Start with a basic semi-circle with a closed base of radius 60 units. Then pad this out at a distance of 40 units on either side of the axis or by using mirrored extent. Then, from one face of the semi-circular solid, make another semicircle of radius 48.75 units with the bases of both the semi-circles coinciding along with their centres.

4. From the centre of the solid’s axis, make a reference plane in the in the zy axis towards the face of the blower. The reference plane must be at a displacement of 81.5 units from the base plane. Another reference plane must also be placed at a distance of 57.5 units from the reference plane that was just placed.

5. Make a figure on the first reference plane with the given dimensions in the diagram. This will be the first half the bower’s mouth.

6. Make an arch with one edge coinciding with the edge of the sectional view of the solid and the other coinciding with the top edge of the diagram you made in the previous step. Ensure that the edge fillet radius of curvature of 15 units is followed.

Sai Nandyala - 1191310067 49

Sai Nandyala - 1191310067 50

7. Use a rib command and join the curved surface of the semi-circular solid and the design made in the previous step. This encloses both the surfaces together with respect to their geometry. Ensure that they have proper dimensions.

8. Remember the smaller semi-circular shape we made in step four with the radius of 48.75 units onto the face of the bigger solid? It is now required to pocket in that figure at a depth of 77.5 units into the semi-circular solid.

9. Now make the same shape with slightly bigger lengths as shown in the diagram attached as the one shown above onto the second reference plane. Ensure that dimensional constraints are followed and that the figure is properly correlating to the design on the first reference plane.

10. Now, use the multi-section solid command to make a connecting solid between these two designs on the reference plane one and two respectively. This makes the long haul of the blower component.

11. Use the shell command and select the surface of the haul shown in the reference plane two or the one in the previous step and the interior of the solid. Make sure that the interior thickness of 2.5 units is also selected in order to make the hole through the haul and connect it to the interior.

12. From the bottom view of the model, make two rectangles where the bolts fit in in the assembly as shown in the figure with the dimensions of 4 units thickness, 15 units in width and 70 units in length. Ensure that this is both bottom base sides for the solid. The thickness can be achieved by using the pad command.

13. Now make a set of eight holes of diameter 4.1 units where four of them on one rectangular block side and the other four on the other. Ensure that they have a specified distance between them.

14. Next make the wall hole of radius 15 units using a semi-circle figure as shown in the diagram. Your upper housing component is done.

Result:

The upper housing component is finished and sent for blower assembly.

Sai Nandyala - 1191310067 51

Sai Nandyala - 1191310067 52

9. Blower Assembly

Aim:

To assemble the parts of the blower those were made in the previous section into a blower assembly.

Procedure:

1. Start by opening the assembly design under mechanical design of the CATIA software

2. Here you need to only use the toolbars of constraints, move, update, and product structure tools commands. Begin with the motor of the blower. Use the option of “existing component with positioning” under product structure tools toolbar. Select the motor component and bring it onto the interface. Make sure you fix this part onto the interface. This part will be our reference part for the entire blower assembly.

3. Next you need to attach a shaft. Import the shaft from the folder and bring it onto the interface. Make a constraint of coincidence between the axis of the shaft and the axis of the motor (the central axis). Also you need to ensure that the shaft is able to go into the motor hold and get fixed there. From the backside hole of the motor, make an offset constraint with the shaft’s end.

4. Now import the cover part onto the interface of the software. From the cover, make sure that the coincidence is given between the axis of the holes on the plate of the motor and the cover. Three coincidence constraints are required here. The first constraint is between the axis of the two components. The second constraint is between one of the plate holes of the cover and the motor plate. The third constraint is another plate between the plane holes of the cover and the motor plate. This would finally put the shaft through the hole of the cover as well.

5. Next import the blower component into software’s interface. Make an offset constraint between the shaft and the hole on the blower. Also ensure that the fix together command is used between the blower and the shaft. Now as you rotate the blower using the manipulation command, you can see the shaft also rotating.

6. Now bring in the lower housing. The central axis of the lower housing must be at a coincidence constraint with the axis of the shaft. Also ensure an angle constraint between the surface of the blower component and the face of the lower housing. Also the angle constraint between the base of the motor and the lower housing should exist where the angle is zero degrees.

7. Next, make a surface constraint between the surfaces of the cover and the plate of the motor. Also import the upper house component.

Sai Nandyala - 1191310067 53

Sai Nandyala - 1191310067 54

8. The upper house component must be adjusted in such a way that the axes of the holes of the component have a coincidence constraint with the holes on the lower housing. Ensure an offset constraint between the surface of the blower and the face of the upper and lower housing to be zero units away from each other. Make sure that all the points are fixed and the component doesn’t move or deform in any way when manipulated with respect to constraints.

9. Your assembly for blower is done

Result:

The assembly of a blower is done with the help of these components:

a. Blowerb. Coverc. Lower Housingd. Motore. Shaftf. Upper Housing

Sai Nandyala - 1191310067 55

Sai Nandyala - 1191310067 56

10. Drafting of Typical Aircraft

Aim:

To draft the aircraft that was assembled in one of the previous sections using drafting workbench in the software

Procedure:

1. Open the CATIA software, click on part design, then select mechanical design, and finally select the drafting under the workbench. You can now see a grid of dark lines on the white background page on the interface. Here, drafting is done.

2. Drafting is done by using different views of any object. In this exercise, we will be drafting the different views of an aircraft. The aircraft assembly is taken from one of the previous experiments and that file is also open simultaneously on the software. After opening the software, the main toolbars used would be geometry creation, select, drawing, geometry modification, dimensioning, annotations, views, and dress up toolbars. You will mainly use dimensioning and views toolbars in this exercise.

3. Select the front view command of the views toolbar. Then minimize the window and open the assembly window. Select the plane which projects the frontal view of the aircraft. Now click anywhere on the drafting page for the projection to be completed. This projects the front view of the aircraft.

4. Next, choose the command Projection View from the views toolbar and select the side view of the aircraft with the help of the plane and attach it onto the drafting interface.

5. Similarly, choose the same command to get the top view of the aircraft.

6. Your dimensioning can be completed by using the option of dimensions from the dimensioning toolbar. You must show any three dimensions from each of the views on this assignment.

7. Your basic drafting is done

Result:

The aircraft is drafted onto the drafting interface.

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