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These 10 free Diemaking Level III questions are organized by exam domain, so you can see how each part of the Diemaking Level III blueprint is tested. Reveal the answer and explanation under each question.
The wire-EDM fixture for a hardened insert locates directly on its finished mounting datums. Heat-treatment movement can exceed the profile's location tolerance, and finish stock has been provided on those datums. Which sequence belongs on the machining traveler?
Correct answer: A - Rough-machine with allowance, heat-treat and temper, finish-grind the datums, then wire-EDM and inspect the profile.
A blanking die will produce a circular blank with a nominal outside diameter of 32.00 mm from 1.50 mm stock. The cutting specification requires clearance of 8% of stock thickness per side. Ignoring elastic recovery and manufacturing allowances, which nominal punch and die-opening diameters belong on the detail drawings?
Correct answer: A - Punch: 31.76 mm; die opening: 32.00 mm.
Pilot holes in a progressive strip become elongated in the feed direction after a servo-feed replacement. The strip advances the specified pitch and lifts clear of the lower die. Observation during a safeguarded test shows the pilots attempting to locate the strip while the feed rolls remain clamped. Which adjustment addresses the mechanism without changing the die's locating geometry?
Correct answer: B - Advance the roll-release timing so the strip can settle on the pilots.
At 6 mm above bottom dead center, two punches cut a combined perimeter of 240 mm through 2.0 mm steel with shear strength 300 N/mm². A pressure pad adds 24 kN. These are the only slide loads at that position; a separate 50 kN forming load has already fallen to zero. The mechanical press has a 250 kN nameplate rating but permits only 160 kN at the cutting position. Using cutting force = engaged perimeter × thickness × shear strength, which assessment applies?
Correct answer: C - 168 kN is required; the cutting-position force limit is exceeded.
A slender trim punch moves sideways under load and returns to its original position when unloaded. Its straightness and hardness meet the drawing, its cutting edge is sharp, and inspection shows no collision. The side load comes from a required one-sided cut. Of the changes proposed for engineering review, which most directly reduces the elastic movement?
Correct answer: A - Add lateral support near the cut to shorten the unsupported punch length.
A drawing specifies a 10.00-10.20 mm hole with position tolerance Ø0.10 mm at maximum material condition relative to datums A-B-C. No datum shift applies. The measured hole is cylindrical, 10.12 mm throughout, and perpendicular to the primary datum; its diametral position error is 0.18 mm. Select the correct size-and-position disposition.
Correct answer: B - Accept: the available position tolerance is Ø0.22 mm.
A capability report for a pierced-hole location gives Cp = 1.80 and Cpk = 0.92. The measurement system is approved, the process is stable and approximately normal, and the mean lies toward the upper specification limit. The customer requires Cpk of at least 1.33. The results support which conclusion?
Correct answer: D - The spread has adequate potential, but the process needs recentering.
Blank-holder trials produce three results with the same blank lot, lubricant, radii, and stroke: 36 kN gives flange wrinkles, 48 kN gives a sound panel, and 64 kN reduces draw-in and causes splits near the punch radius. Holder contact is uniform, and every trial reaches the specified depth without press overload. What mechanism explains the high-force failure?
Correct answer: C - Excessive flange restraint has increased tensile strain in the drawn wall.
During a safeguarded part-out test, a proximity input remains ON after the metal target is removed. The specified logic is ON while the part is present and OFF before the next feed; both states are checked every cycle. Although the channel passes the part-present check, its response means that:
Correct answer: D - The channel cannot prove part clearance and has failed its functional test.
A mechanical tryout press has been stopped for replacement of a damaged cam-return spring. External energy sources have been isolated and locked out, but the raised slide is not blocked and the spring remains compressed. The diemaker must work between the dies. Before the spring retainer is loosened, what additional protection is required?
Correct answer: C - Block the slide, restrain or safely unload the spring, and verify isolation before servicing.
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