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Cause Analysis of Bursting of Hardware Stamping Die

date：2023/08/18

Metal stamping die template burst, is a very common situation, but serious time, is a template suddenly divided into several pieces.Of course, there are many reasons for the direct cracking of the template, from the mold design to purchase materials to stamping Operation process, can be affected. The following small series finishing the following metal stamping die burst reasons.
Hardware stamping die burst analysis:
1, blanking is not smooth
Before the production without demagnetization, no back material shoots; production of broken needle off the spring and other card material; assembly mold when no leakage feces, or roll block feces, pad feet blocking feces, which is the most common, assembled master if you do not pay attention, This is the case most likely to occur when there is a large number of blankets, or when the mold has a pad.
2. design process
Mold strength is not enough, knife blade spacing is too close, the mold structure is irrational, the number of templates is not enough pad pad feet.
3. Heat treatment: quenching and tempering process improper deformation
Practice has proved that the mold of the thermal processing quality of the mold on the performance and great impact on life. Analysis of the reasons for failure from the mold statistics can be seen, due to improper heat caused by mold failure "accident" about 40% or more.
5. Wire cutting improperly
To pull line line cut, line cut gap processing is not right, did not make clear angle and line cut the impact of metamorphic layer. Die cutting edge more use of wire cutting processing. Due to the thermal effect of wire cutting and electrolysis, the mold surface to produce a certain thickness of the metamorphic layer, resulting in surface hardness decreased, there are micro-cracks, etc., resulting in wire cutting die prone to early wear and tear, directly affect the mold blanking gap Keep and edge easy to chipping, shorten the mold life. Therefore, in the line cutting process, should choose a reasonable electrical specifications, to minimize the depth of metamorphic layer.
6. Punch equipment selection
Punch tonnage, blanking force is not enough, under the moderator too deep. Stamping equipment (such as presses) accuracy and rigidity, the impact of the life of the die is extremely important. Stamping equipment, high precision, good rigidity, die life greatly improved. For example: complex silicon steel sheet material for the Crl2MoV, in the ordinary open press on the use of the average grinding life of 1-3 million times; and the use of new precision presses, die grinding life of up to 6-12 million times.