ASSIGNMENT D-28: EXTRUDE FORM PUNCH 1. What size chamfer is required on the punch head? 140/.110 2. What is the diameter of datum feature A? 3. What surface finish is required on datum feature A? 4. What size flat is shown on the punch tip in the detail of the tip? 5. What is the diameter of the .1075 radius cut into the punch tip? 6. How deep is the radius cut into the tip? 7. What is the maximum allowable diameter of the punch tip? 8. What is the minimum allowable diameter of the punch tip? 9. What is the length of the - .560 diameter? (Max / Min) .555 10. What is the length of the punch tip? 11. The punch tip must be concentric to datum A within 12. What is the surface finish required on the punch tip diameter? 13. The surface finish on the punch tip is a. smoother than the finish on datum A. or b. rougher than the finish on datum A. 14. Sharp corners may be broken to a maximum radius of 15. What is the length of dimension ®? (Max / Min) By DATE By OATE By DATE By DATE Vø.4070 4065 Ø.560 555 45 .015 -× 45° .045 .325 R-99 020 .010 2.390 2.360 R18- 390 .360 SHARP ø]Z90 785ז Ø.0005 A NOTE: AREAS MARKED TO BE FREE FROM SCRATCHES, TOOL & ROCKWELL MARKS .030 040 BREAK SHARP EDGES R.010 MAX (EXCEPT AS NOTED) SEE RING #24915-2, -3 FOR PROCESS DWG R.1075 015 .005 FLAT EXTRUDE FORM PUNCH ø.159 CUST. CITY. Co. 8.0. TOOL #K-1010 QUAN. DATE RING DIVISION DR. JGM DATE 4/5/03 AISI- 01 Rc- 61-64 CK. DATE DRAW HD RC 50-55 D-28 PRODUCTO MACHINE CO. JAMESTOWN, NEW YORK 1471 VG No. - 24915-1 DWG. LATEST CHANGE REV. TEMP No. T- REC'D COURTESY OF RING DIVISION, PRODUCTO MACHINE CO. 24915-1 REV.
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
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