Analysis of three common problems ofmachines hydraulic press brake mould

1, machines hydraulic press brake mold damage

Bending machine mold damage refers to the mold cracking, breaking, expanding, etc., to deal with the problem of bending machine mold damage, we must look for reasons from the design of bending machine mold, manufacturing process and mold use.

First of all, it is necessary to review whether the manufacturing materials of the bending machine mold are suitable and whether the corresponding hot burying process is reasonable. Usually, the heat treatment process of die material has a great influence on it. If the quenching temperature of the mold is too high, the quenching method and time are unreasonable, as well as the number of tempering and temperature, and the improper selection of elbow, it will lead to the damage of the bending machine mold after entering the bending production. Blanking hole size or depth design is not enough, easy to make the slot blocked, resulting in blanking plate damage. Spring force design is too small or equal to high set of unequal height, will make the spring fracture, blanking plate tilt. Cause overlap punching, damage parts. Punch improperly fixed or screw strength insufficient. Can cause the punch to fall or break.

When the bending machine is used, the position and direction of parts are installed incorrectly or the bolts are not fastened properly. Working height adjustment is too low, guide column lubrication is insufficient. Failure of feeding equipment, abnormal press, etc., will cause mold damage. If foreign bodies enter the mold, parts overlap, waste blocking and other situations are not dealt with in time, continue processing and production, it is easy to damage the mold blanking plate, punch, lower template and guide pillar.

2, the mold

In the process of bending, once the bending machine die is not flexible, or even stuck, it is necessary to stop production immediately, find out the cause of the stuck die, and troubleshoot. Otherwise, the failure will be enlarged, resulting in bending machine mold damage.

The main causes of clamping die are: poor die guidance, tilt. Or there are foreign bodies between the templates, so that the templates can not be flat paste; The die strength design is insufficient or the force is uneven. Cause mold deformation, such as mold base, template hardness, thickness design is too small, easy to be impacted by external force deformation; The location of the mold is not correct, and the positioning error of the upper and lower molds is out of tolerance. Or the precision of the press is too poor, so that the mold interference; The strength of the punch is not enough, the position of the punch is too close, so that the lateral force of the die is not balanced. At this time should improve the punch strength, enhance the guide protection of discharge plate.

3, bending machine mold damage and maintenance

The mold cost of bending production is high. Usually bending machine mold cost accounts for 1/5-1/4 of the total cost of parts. This is because, in addition to mold manufacturing difficulty, high cost. After the production of mold repair and grinding maintenance costs are also high, and the original cost of the mold only accounts for about 40% of the entire mold cost. Therefore, timely maintenance of mold, prevent mold damage, can greatly reduce the cost of bending production of mold.

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