DUE DATE: Friday 4/6/2018 at 3:30 PM

Transcription

1 MECH 130 SPRING 2018 CAD LAB 4 FINAL REVISION HARDCOPIES NEEDED DUE DATE: Friday 4/6/2018 at 3:30 PM After the revised hitch, the ball and the pin parts were created from the Handout call LAB4 PART Creation, create the 4 following drawing layouts. The hardcopies should be printed at a SCALE 100%. THIS HANDOUT ALSO INCLUDES INSTRUCTION FOR LAB 4D a RETAINING CLIP! Don t forget to submit the PART file (not the Drawing file) for the PIN LAB 4A) Part: HITCH Complete the hitch that was started in in-lab. After completing in-lab handout all the way to end go and make these modifications to the hitch to finalize for Lab 4A. 1) Edit the SKETCH of the first extrude part change from an angled line length from to AND change the sketch fillet from 2.00 to R AND change the angle from 120 to 110 (see illustration below) 2) Edit FEATURE of the first extruded part from a thickness of.5000 to a thickness of.6750 AND Depth from to ) Edit the distance of the inserted plane from to ) Edit the chamfer from a distance of.50 to a distance of.25 (they should already have been made with equal distances option checked on). Shown here as a TRIMETRIC View ` S18_LABFOUR.doc Page 1

2 Hardcopy of Revised Hitch FOR REFERENCE ONLY Dimensions to 4 decimal places. Orthographics 2:3 Scale Include dimensions and annotations as shown. NOTE: this should automatically read SCALE 2:3 S18_LABFOUR.doc Page 2

3 LAB 4B) Part: BALL Here is the initial sketch to use for the ball. Use this sketch to get a main portion of the ball done. Revolve around the vertical centerline. ORIGIN Here is the bottom view of the original revolved. Sketch a polygon on the bottom, centered with axis The construction circle is diameter of Constrain as shown Extrude a distance of.5000 S18_LABFOUR.doc Page 3

4 Here are more details for the ball. Other details: 2 different fillet features (R.25 on edges and R.10 on FACE) 1 extrude of Ø1.000 circle sketched on bottom and to remain concentric with ball base projects Extruded Cut (SINGLE HORIZONTAL LINE sketch will not be fully constrained sketch for this one time) to flatten off top of ball (Distance is ) 1 chamfer feature (Size.1000 ) Equal Distances Make FAKE THREADS (they do NOT follow a helix). Sketch the 3 line triangular cross-section on the FRONT PLANE as shown to left vertical line (collinear to silhouette edge of shaft) and its endpoint is at edge of chamfer. Angle of 60 and EQUAL RELATIONS. Then make a REVOLVED cut of a triangular cross-section) (there isn t a need for a construction line as long as you view TEMPORARY AXIS. This will get one fake thread. Use a Feature Linear Pattern to array it 10 times up the shaft (spacing of.125 ) S18_LABFOUR.doc Page 4

5 HARD COPY FOR THE BALL: FOR REFERENCE ONLY NOTE: this should automatically read SCALE 1:2 Dimensions to 4 decimal places. Orthographics 1:2 Scale Trimetric Scale 1:1 with tangent edges as font Include dimensions and annotations as shown. S18_LABFOUR.doc Page 5

6 LAB 4C) Part: PIN This part will require the use of two sweeps. One needs only a path sketch since it will use a circular profile. The other will require TWO SKETCHES, one will be the path sketch and the other a profile sketch which will be a hexagonal polygon. Important to Note: THIS PART FILE for LAB 4C (the PIN) will also be handed in electronically and checked. NAME YOUR PART FILE: PIN### (where the ### is your class ID number) and submit via Canvas, in the Assignments section of your LECTURE class. Shown here is the sketch to use for the path. Draw a HORIZONTAL line that is in length, then another line that is.7500 in length, the angle between the lines is as shown. Next use a sketch fillet (KEEP CONSTRAINED CORNERS) to complete the sketch. The sketch should be done as shown and fully constrained. Use a Ø.6500 for the circular profile size. Use Circular Profile Here is the resulting sweep shown in Trimetric. Also helps to show tangent edges as phantom and view temporary axis. ( S18_LABFOUR.doc Page 6

7 You need TWO SEPARATE sketches to do the next sweep. Here is the first initial sketch (on the Front Principal plane) to use for the hexagonal sweep. Start with two lines (they dimensions are shown). One of the lines is constrained to be COLLINEAR with the axis of the circular pin AND its endpoint is at the MIDPOINT of the edge. The other line is at 145 to the first. THEN add the Sketch Fillet radius of.60 (allows for constrained corners as shown). The fully constrained sketch shown here that is to be used for the path sketch. Here is the 2 nd SEPARATE sketch done on end of the circular sweep. It is a polygon (6-sided) with a Ø.7500 and its center is coincident with the axis. S18_LABFOUR.doc Page 7

8 Use a CHAMFER FEATURE (Angle distance:.3000 and 30 ) as shown on the circular edge near the joint at the hexagon.. Notice that for the direction there is an arrow (pink) that points away from the hexagon surface. You will want to have the Full Preview option selected. CHAMFER FEATURE ON THE END EQUAL DISTANCES. Sketch on the FRONT principal plane a Ø.1200 circle as shown, a distance of.3500 from the end. Use an Extruded cut (Through All - BOTH). Complete the pin part by using a FILLET FEATURE of a R.05 on the FACE on the hexagonal end of the pin. Here s what the resulting pin should look like S18_LABFOUR.doc Page 8

9 ` FOR REFERENCE ONLY NOTE: this should automatically read SCALE 1:1 Dimensions to 3 decimal places. Orthographics 1:1 Scale Rotated Left side View (15 ) Scale 3:2 Shaded with Edges Include dimensions and annotations as shown. Don t forget: SUBMIT THE PART FILE (not the drawing sheet layout) for the PIN. Name it specifically PIN### (where the ### is your class ID number) and submit via Canvas, in the Assignments section of your LECTURE class. It must be submitted before the due date and time or the entire lab will be considered late. S18_LABFOUR.doc Page 9

10 FOR LAB 4D - CLIP FIRST Construct a part of the clip shown here on the right. Sizes are in inches. Assume the hole and both slots go all the way through. The sizes shown are not necessarily the driving dimensions to use instead use some common sense design intent to create your model. Orientation of your model should be that its orthographics are consistent with what is shown THEN generate a drawing of the part. Print at 1:1 a layout of the DRAWING sheet as shown. The page layout print is Scale 100%. Orthographics are 1:1 This scale should automatically be reflected in the titleblock area. See NOTE. o Tangent edges removed. o Hidden Lines displayed TRIMETRIC View is as shown with hidden lines displayed and at 1:2 Scale. Include all the annotations as shown FOR REFERENCE ONLY NOTE: this should automatically read SCALE 1:1 IN ADDITION TO THIS HARDCOPY FOR LAB 4D ONLY Include on a separate full size sheet, a clear brief description (handwritten is fine but MUST BE LEGIBLE) listing 3 DIFFERENT unique design intents that you used for your part model HOW you did it and WHY. You may include sketches to help describe the design intent you used. S18_LABFOUR.doc Sketches can be rough but again MUST BE LEGIBLE! Page 10

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