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Stamping often die failure reasons
Nov 24, 2017

Stamping often die failure reasons


Stamping is the production of large quantities of parts forming one of the practical process. Die failure is the most prone to stamping production problems, often resulting in shutdown, affecting product life cycle. Therefore, we must find the cause of mold failure, reasonable maintenance.


    1 mold damage


    Die damage refers to the mold cracking, broken, up, etc., to deal with the problem of mold damage, the mold must be from the design, manufacturing processes and mold use to find the reasons. If the foreign body into the mold, parts overlap, waste obstruction and other conditions are not handled in time, inherited processing, it is very easy to damage the mold blanks, punches, under the template and guide posts. Spring force design is too small or contour sets of unequal high, will break the spring, blanking plate tilt, causing overlapping punching, damaged parts. If the mold quenching temperature is too high, quenching methods and time is not fair, as well as the number of tempering and temperature, elbow choose inappropriate, will lead to the mold into the stamping after the production damage. Improper fixing of the punch or insufficient strength of the screw can cause the punch to fall or break. Adjustment of working height is too low, guide column lubrication is insufficient. In general, the heat treatment process of mold materials has a great influence on it. Blanking hole size or depth of the design is not enough, easy to make the slot obstruction, resulting blanking plate damage. When the mold is used, the installation position or orientation of the part is wrong or the bolt is not fastened properly.


    2 card mold


    The main reasons causing mold: mold orientation is not correct, tilt. Otherwise, it will expand the fault, resulting in mold damage. Resulting in mold deformation, such as mold base, the template hardness, thickness design is too small, easily affected by external impact deformation; mold installation is not allowed, the upper and lower mold positioning error tolerance. At this time should improve punch strength, and enhance the guide plate protection.


    Or the accuracy of the press is too poor, the mold interference; punch strength is not enough, the size of the punch too close to the mold, the lateral force imbalance. Stamping process, once the mold clamping is not flexible, or even stuck, it must immediately stop production, identify the reasons for the mold, troubleshooting.


    3 mold damage and maintenance


    Stamping the production of high cost molds, mold costs usually account for the total cost of the workpiece 1 / 5-1 / 4. One-time repair cost more than 70% of the original cost of the die, or die life is near. When the mold repair technology is too complicated, mold repair cost is too large, the difficulty is bound to make the maintenance cycle is too long, a serious impact on the normal production stamping, should choose to retire early scrapped, re-create the mold. In general.


    Die damage, there is a maintenance and scrap the choice of topics. but. Therefore, timely maintenance of mold to prevent mold damage, can greatly reduce the stamping die cost. When the hub of the mold is severely damaged, sometimes convex and concave mold are damaged at the same time. This is because, in addition to mold manufacturing difficult, high cost. Non-natural wear and tear of stamping die failure, such as the destruction of non-hub parts.


    Under normal circumstances, the main form of stamping die failure is excessive wear and tear. Manufactured from the new mold for delivery. Until the stamping parts burr is excessive, the size of the parts and the accuracy of position tolerance, and the mold can no longer be repaired or no repair value, the mold can only be scrapped. Put into use from the new mold to scrapped.

Hubei Kaixin Supply Chain Management Co., Ltd.

TEL :+8618272169977 ; 0714-6510168



Add:No.37 Huahu Ave Huahu Street.Huangshi City Hubei