Student Workbook for Programming of CNC Machines. Ken Evans
In the example in Figure 1-1, the parts are provided as 3.0625 long slugs with one end having already been faced. It will be necessary to clamp the 2.50 diameter in pre-machined soft jaws with enough material extended to allow machining of the part, including removal of 1/16 inch from the face of the part. The material is 4340 alloy steel. Dimensional tolerances are as follows: .X = plus or minus .015 inch, .XX = plus or minus .010 inch, .XXX = plus or minus .005 inch, and angular tolerance is plus or minus .5 degree. Please use copies of the Process Planning sheets and develop a plan to machine the part to dimensional requirements.
Chart 1-2 Process Planning CNC Setup Sheet
| Date | Prepared By |
| Part Name | Part Number |
| Machine | Program Number |
Workpiece Zero: X___________ Y __________ Z _________
Setup Description:
| ToolNumber | OffsetNumber | Tool Description | Comments |
Chart 1-3 Process Planning Quality Control Check Sheet
| Date | Checked By | ||
| Part Name | Part Number | ||
| Sheet ___ of ___ | |||
| Blueprint Dimentsion | Tolerance | Actual Dimension | Comments |
|
|