GEOMETRIC CONSTRUCTION TOOLSAssignment D6
CURVES AND PROFILES CURVES include lines and arcs A PROFILE is a closed region made up of curves When you have trouble with a sketch that you can’t extrude, it’s because it
isn’t a complete profile
DO 1 Start a new METRIC part Turn visibility on Make a new sketch on the XY plane Make sure the cube in the top right is flipped right side up
DO 2 We are going to draw this in a
very specific way. The exact placement doesn’t
matter But it’s location in reference to the
XY axes does matter Don’t worry about measurement
now Start in the top left quadrent, and
draw the shape shown. Make sure the points wind up in the correct quadrant.
DO 3 Add a CENTER POINT CIRCLE that
is in quadrant one of Arbitrary Size
Arbitrary Size = Size doesn’t matter
DO 4 Add a line that is Coincident to
the circle - See the how the coincident box pops up on my drawing?
It should also be coincident to the bottom line
DO 5 Edit Sketch by dragging
the CENTER POINT of circle up and to the right.
The circle will automatically change size because it need to keep constrained to the diagonal line
DO 6 Drag the lines and points of
your sketch around so that it looks approximately like mine You can move lines by click
on them End points can also be
moved For the circle you can move
the edge and the center point
DO 7 We are going to add a couple
constraints The first is a measurement
constraint, DO NOT CHANGE THE NUMBER YOU GET
This is still a rough sketch
DO 8 Add a tangent constraint between
the circle and the diagonal line
DO 9 Trim and Extend are used to the
shorten/lengthen an object. This will help you make profiles.
Use extend to bring the top line over to the circle
DO 10 Use TRIM to lop off the extra in
the bottom right corner
DO 11 Add a vertical
dimension between the center of the circle and the top line.
Change the dimension to 0 so they are aligned
DO 12 Add the
dimensions shown, again, don’t worry about the size, just the fact that they exist
Trim the circle
DO 13 Add the four
2mm fillets shown
DO 14 Add a fix constraint to the center
of the arc, once you add this your drawing will be fully constrained
DO 15 Change the
measurements to the ones shown
Since the drawing is fully constrained, it shouldn’t get all weird when you finish changing them
DO 16 Finish the sketch Extrude it 5mm
DO 17 Create a new sketch on the front
surface of the shape.
DO 18 Click offset, then click the edge of
the shape and move your mouse towards the center of the object
DO 19 Add a dimension
between the original and the offset profile and set it to 15
DO 20 Finish the sketch Cut out the interior And your done, save your work as D6-Gasket
You have 3 exercises to go with this assignment, ask me for them