Test 3

Test Requirements Mill Test #3 When: Lesson #8 Percentage Weighting = 30% Notes: A. Time allotment is 2 hours. B. The 4 Holes marked “A” on the drawing have previously been drilled. These holes will be used to install ¼” diameter socket head cap screws to fasten the blank part to a fixture. C. The thickness of the part has been previously machined to ½” thickness and does not require machining. 1.

Draw the 2D part Geometry Note: if the part is not drawn correctly a mandatory failing grade will be assigned.

2.

Job Setup Material Size should be rounded up to closest 1/8” Material Type - Aluminium T6061 X0 Y0 center of 1.0175” hole Z0 bottom of part

3.

Machining Processes All Operations Completed – Note: if all operations are not completed and mandatory failing grade will be assigned. Spot Drill Holes – not holes A

Pass/Fail

10%

Pass/Fail 10%

4.

Drill ¼” Holes – not holes A *Use peck drill cycle

10%

5.

Pre Drill 1.0175 diameter hole with suitable drill

10%

6.

Machine 1.0175 diameter hole with an end mill using circle mill Note: If circle mill toolpath not used an automatic 10% will be deducted

20%

7.

Machine 2” dia. Pocket .125” depth

10%

8.

Rough and Finish Contour Use Depth Cuts and Multi Passes Use Lead In Lead Out

18%

9.

Left hand Pocket through part Use Depth Cuts Use Lead In Lead Out

12%