Wire EDM Machine Operation Chapter 11
Copyright November, 98 Page 11-12 Sodick Inc.
6) Say you had to machine a punch and die. Based on the workpiece material, wire
diameter, workpiece thickness, and finish requirements, you looked in the SODICK
condition manual and found that you needed three total passes (rough and two trims) to
machine the parts to the desired size and finish. You want to machine the PUNCH ON
SIZE and incorporate .003 inch die clearance per side in the die. Here are the “on size”
offsets you found in the SODICK condition manual:
Rough pass: H087
First trim: H056
Second trim: H053
What values would you use as the offsets to make the die with .003 per side clearance?
Rough pass: H____
First trim: H____
Second trim: H____
7) What is the top of a program called where cutting conditions and offsets appear?
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8) What is the purpose for machining a test square?
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9) Say you machined a .500 inch square test punch with two passes and .010 diameter
wire. Say roughing pass used an offset of .0088 and the finish pass used an offset of
.0055 inch. After cutting the test square, the finish looked OK, but the size was .5006
inch square. What would you do to the two offsets to make the next workpiece cut with
the same machining conditions come out on size?
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10) If making the punch “on size” and you want to incorporate .002 inch clearance per
side in the die, what would you do to the “on size” offsets to machine the die with the
proper clearance?
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11) Why is it important to incorporate a small radius (bigger than the wire radius) on
ALL OUTSIDE corners of punches and dies?
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12) If machining punches and dies, is it wiser to run the punch or the die first?
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Why?
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