BTEC National Diploma in Engineering

Level 3

Unit 17

Computer Aided Drafting in Engineering

Student Name:

Assessor Name: Alex Guntripp

Document Revision & Date: Rev 1 (18/12/12)

Students to initial the box in the “Submitted” row below to show that an assignment is being submitted for assessment.

Learner Declaration:By initialling the submission box below, I confirm that the work submitted to complete the given tasks is my own. I have indicated where research and other sources have been used to confirm the conclusions reached within the submission and have listed those sources in a bibliography.

Outcome P1 P2 P3 P4 P5 P6 P7 M1 M2 M3 D1 D2

Submitted

Achieved

Referred

Resubmitted

Page 1

Outcome Assignment Task Task No. Evidence Achievement

DateAssessor Signature

P1

Describe the advantages, compared to other methods, of producing drawings electronically using a CAD package

1 Written Assignment

P2Describe the software and hardware required to produce CAD drawings

2 Written Assignment

P3

Produce 2D CAD detail drawings of five components that make up an assembly or sub-assembly to given standards, using appropriate commands

3 Adj. Screw4 Jaw5 Slide Locator6 T Bar7 T Bar End8 Hex Screw9 Socket Screw

P4

Produce a circuit diagram containing at least five components to appropriate standards, using appropriate commands

10 Circuit Diagram

P5

Produce an assembly drawing and exploded view of an assembly or sub-assembly containing at least five parts, using appropriate commands

11 Assembly

12 Exploded Assembly

P6

Interpret the properties of an engineering component or circuit from a given CAD drawing

13 Written Assignment

P7Within a 3D environment construct a 3D CAD drawing as a surface and solid model

14 Written Assignment

M1

Explain the relationship between CAD and other software/hardware used in manufacturing

15 Written Assignment

M2

Explain how the range of commands used to produce CAD drawings can impact drawing production

16 Written Assignment

M3Explain how 3D CAD models can be used in the design process

17 Written Assignment

D1 Justify the use of CAD in a manufacturing company 18 Written

Assignment

D2Evaluate the impact of the use of 2D and 3D CAD models on final design requirements

19 Written Assignment

Task(s) 1

Page 2

Assignment Deadline

Outcome P1

Assignment Brief Describe the advantages, compared to other methods, of producing drawings electronically using a CAD package

Evidence Written Assignment

Assignment Guidance

Describe the advantages of CAD versus non-electronic drawing methods. Consider factors such as reproduction, data sharing and storage, interfacing with C.N.C. (Computer Numerical Control) production machinery.

Task Requirement Task completed to the required standard?YES NO

Your assignment should describe and compare at least the points listed below:Reproduction of drawingsData sharingInterfacing with CNC machineryAccuracyEditing, making changes and updating drawingsDrawing storage in terms of space, locating lost drawings, keeping back-ups in case of fire, flood, or theft.Interfacing with other production machinery via the CAD>CAM>CNC linkSummary.

Assessor Feedback: Achieved?YES/NO

Page 3

Task(s) 2

Assignment Deadline

Outcome P2Assignment Brief Describe the software and hardware required to produce CAD drawingsEvidence Written Assignment

Assignment Guidance

As an engineer, you may work for a company already using CAD or wanting to upgrade the CAD system they are currently using. Therefore, you need to have a working knowledge of the system hardware specification required to run given CAD software. Also describe the hardware required to produce CAD drawings. Finally describe the CAD software available and evaluate the advantages and disadvantages of 2 CAD systems by comparing SolidWorks with Autodesk Inventor.

Task Requirement Task completed to the required standard?YES NO

Your assignment should describe and compare at least the points listed below focussing mainly on the use of SolidWorks:

Software required such as the operating systemOther software required to link to SolidWorks to ensure it runs correctlyMinimum system requirements such are hard disk space, RAM, processor and video card

Hardware required to operate SolidWorks, including a monitor and printer.A brief description of at least one other input device other than a mouse.Output devices, other than a printer. Data storage options

Compare SolidWorks with a comparable 3D solid modelling package such as Autodesk Inventor highlighting good and bad area’s with each.

Assessor Feedback: Achieved?

YES/NO

Page 4

Task(s) 3-9

Assignment Deadline

Outcome P3

Assignment BriefProduce 2D CAD detail drawings of five components that make up an assembly or sub-assembly to given standards, using appropriate commands

Evidence Drawings

Assignment Guidance

Produce 3D models for each of the parts of the Drill Vice Assembly and from them produce 2D CAD drawings for all of the parts that make up a Drill Vice except the Drill Vice Body. All drawings should be presented in 3rd angle orthographic projection and contain an isometric view of the part. Each drawing needs to be completed to BS8888.

Task Task Requirement Task completed to the required standard?YES NO

Task 3 Drill Vice Adjuster ScrewTask 4 Drill Vice JawTask 5 Drill Vice Slide LocatorTask 6 Drill Vice T BarTask 7 Drill Vice T Bar EndTask 8 Drill Vice Hexagon Head ScrewTask 9 Drill Vice socket Cap Head ScrewAssessor Feedback: Achieved?

YES/NO

Page 5

Page 6

Page 7

Task(s) 10

Assignment Deadline

Outcome P4

Assignment Brief Produce a circuit diagram containing at least five components to appropriate standards, using appropriate commands

Evidence 2D CAD Drawing

Assignment Guidance Produce a drawing of an electronic circuit diagram for a transistor switch circuit, using the correct symbols and annotate as necessary.

Task Requirement Task completed to the required standard?YES NO

Is the circuit diagram neatly laid out?Does the circuit diagram show the Bill of Materials?Does the circuit diagram show the required information in a title block?Are all the components identified by an alpha-numeric identification?Are each of the components drawn clearly and correctly?

Assessor Feedback: Achieved?

YES/NO

Page 8

Task(s) 11-12

Assignment Deadline

Outcome P5

Assignment Brief Produce an assembly drawing and exploded view of an assembly or sub-assembly containing at least five parts, using appropriate commands

Evidence Drawings

Assignment Guidance

Produce a 3D assembly model containing the required number of each of the parts of the Drill Vice Assembly.

From the assembly model produce a 3D exploded assembly. Then produce 2D CAD drawings for the Drill Vice Assembly and

Drill Vice Exploded Assembly, including Bill of Materials and identification balloons for each part.

The assembly drawing should be presented in 3rd angle orthographic projection and contain an isometric view of the part.

The Exploded Assembly drawing should contain just an exploded isometric view of the part. Each drawing needs to be completed to BS8888.

Task Task Requirement Task completed to the required standard?YES NO

Task 11 Drill Vice Assembly

Task 12 Drill Vice Exploded Assembly

Assessor Feedback: Achieved?

YES/NO

Page 9

Task(s) 13

Assignment Deadline

Outcome P6

Assignment Brief Interpret the properties of an engineering component or circuit from a given CAD drawing

Evidence Written Assignment

Assignment Guidance

Interpret the properties of the Drill Vice Adjuster Screw shown on the next page. State whether it is drawn in 1st or 3rd angle orthographic projection and describe how you know this.Detailed information as shown in the table below should be included. Don’t just copy what’s on the drawing verbatim, it is important to show that you can interpret this information into text. Eg. If a thread size is stated as M4x0.7, describe the thread type, including its diameter and pitch. This assignment also counts for P3 of Unit 16 – Engineering Drawing for Technicians.

Task Requirement Task completed to the required standard?YES NO

Are the following points adequately interpreted, described and explained?:The overall sizes of the part.The sizes of each element of the part, both length and diameter.ChamfersThreadCross-drilled holeThe orthographic view of the drawingThe details of the information contained in the drawing data block

Assessor Feedback: Achieved?

YES/NO

Page 10

Page 11

Task(s) 14

Assignment Deadline

Outcome P7

Assignment Brief Within a 3D environment construct a 3D CAD drawing as a surface and solid model

Evidence Written Assignment

Assignment Guidance

As evidence of the drill vice parts being created as 3D models, provide screen dumps as printed documents showing each of the Drill Vice parts which have been modelled in 3D using SolidWorks.

Each part should be captured from at least two viewpoints, one of which should be the isometric view and the other should show the opposite 3 sides of the model from the isometric view.

Describe each of the views from the list below.

Task Requirement Task completed to the required standard?YES NO

Does the assignment contain the following 3D models:Drill Vice Adjuster ScrewDrill Vice JawDrill Vice Slide LocatorDrill Vice T BarDrill Vice T Bar EndDrill Vice Hex Head ScrewDrill Vice Socket Cap Head ScrewDrill Vice BodyDrill Vice AssemblyDrill Vice Exploded AssemblyAssessor Feedback: Achieved?

YES/NO

Page 12

Task(s) 15

Assignment Deadline

Outcome M1

Assignment Brief Explain the relationship between CAD and other software/hardware used in manufacturing

Evidence Written Assignment

Assignment Guidance

Describe the relationship between a typical CAD system and other software/hardware in a production environment. Consider how 3D models interface directly with CNC machining work centres and how that reduces time and errors.

Task Requirement Task completed to the required standard?YES NO

Your assignment should describe the interface between SolidWorks and other software/hardware as a minimum covering the examples listed below:CAM softwareCNC machineryFinite Element Analysis (FEA)Other CAD softwareSavings in time and errors

Assessor Feedback: Achieved?

YES/NO

Page 13

Task(s) 16

Assignment Deadline

Outcome M2

Assignment Brief Explain how the range of commands used to produce CAD drawings can impact drawing production

Evidence Written Assignment

Assignment Guidance

Produce a written evaluation, to demonstrate how the use of a range of commands can affect the efficiency of drawing production in terms of speed, accuracy and repeatability. Comparisons should be made between best practice and less efficient methods. Particular mention should be made of the use of the rectangle, polygon and mirror commands, although others should be considered. These commands should be compared with less efficient methods. In the case of rectangles, drawing 4 separate lines versus using the rectangle tool.Speed, accuracy and repeatability should feature strongly with the role they play in the preferred methods.

Task Requirement Task completed to the required standard?YES NO

Your assignment should explain, evaluate and compare a range of commands in SolidWorks as a minimum covering the examples listed below:RectanglePolygonMirrorAt least one other

Assessor Feedback: Achieved?

YES/NO

Page 14

Task(s) 16

Assignment Deadline

Outcome M3Assignment Brief Explain how 3D CAD models can be used in the design processEvidence Written Assignment

Assignment GuidanceProduce a written assignment describing the commonly used 3D commands, include screen dumps of your own work to demonstrate and describe the advantages of using 3D models in the design process

Task Requirement Task completed to the required standard?YES NO

Your assignment should describe the advantages of a range of 3D commands in SolidWorks as a minimum covering the examples listed below:A range of at least 4 3D commands of your choice1.2.3.4.Plus at least the following:Rotating the viewZoomingCross-sectioningAssemblyExploded Assembly

Assessor Feedback: Achieved?

YES/NO

Page 15

Task(s) 18

Assignment Deadline

Outcome D1Assignment Brief Justify the use of CAD in a manufacturing companyEvidence Written Assignment

Assignment Guidance As the user cost for a modern CAD system is not cheap, justify the use of CAD in a manufacturing company.

Task Requirement Task completed to the required standard?YES NO

Your assignment should justify and evaluate the use of SolidWorks in industry as a minimum covering the examples listed below:CostsTraining requirementsAdvantagesDisadvantages

Please note. This assignment should draw from many of the topics discussed in previous assignments, but analysing them from the perspective of this assignment, as described in the assignment guidance above

Assessor Feedback: Achieved?

YES/NO

Page 16

Task(s) 19

Assignment Deadline

Outcome D2

Assignment Brief Evaluate the impact of the use of 2D and 3D CAD models on final design requirements

Evidence Written Assignment

Assignment Guidance

Complete a written assignment describing the advantages of using 3D models in the 3D assembly process.Produce a written evaluation of the difference between 2D drawings and 3D models from a customer’s perspective, including how customers might interpret this information for their final design requirements. Compare the use of a 2D CAD package, such as AutoCAD, with the use of a 3D CAD package, such as SolidWorks, when completing a design task from inception to completion. You may use the Drill Vice Assembly and it’s components as your example.

Task Requirement Task completed to the required standard?YES NO

Your assignment should evaluate the use of SolidWorks in industry as a minimum covering the examples listed below:Evaluate the advantages and disadvantages of 2D drawings versus 3D modelsHow customers might interpret 2D and 3D information for their final design requirementsCompare the use of a 2D CAD package, such as AutoCAD, with the use of a 3D CAD package, such as SolidWorks, when completing a design task from inception to completion.

Note. Use YouTube tutorials to gain an understanding of AutoCAD 2D before attempting the last element of the assignment.

Assessor Feedback: Achieved?

YES/NO

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