Maintain the good quality of stamping die

Dalian stamping die is the main stamping process equipment, stamping parts is to rely on the relative movement of the upper and lower mold to complete. Because of the continuous separation of the upper and lower mold, if the worker's fingers continue to enter or stay in the closed area of the mold, it will pose a serious threat to personal safety.



Pressing parts include blank holder, press plate and so on. The blank holder can press the blank force of the drawing blank, so as to prevent the billet from arching under the action of the tangential pressure and form a wrinkle. The role of the press plate is to prevent the movement and bounce of the billet. Ejector and stripper plate are easy to remove parts and clean waste materials. They are supported by spring, rubber and air cushion push rod on the equipment, and can move up and down. The ejector parts should have enough ceiling force and the movement must be limited.



In the process of stamping production, the size difference is caused mainly by the abrasion of the die, the poor positioning and the deformation of the parts. Die edge wear will cause burr too big or cut size becomes larger, punch smaller, flatness is too bad, should be grinding or replace the mold. The positioning guidance is bad, including no guide, guide pin or other positioning device does not work, the feeder does not relax, the positioning block wear makes the distance too long, the length of the guide plate is wrong or the gap between the guide material is too large, etc..



Vacuum heat quenching, vacuum air cooling quenching and vacuum tempering are the main applications in vacuum heat treatment of stamping dies. In order to keep the excellent characteristics of vacuum heating of workpieces (such as dies), the selection and formulation of coolant and cooling process are very important.



The surface quality of stamping die parts is mainly caused by excessive burr. The cause of burr is too large, the first is the die edge wear, should be re grinding mold (hereinafter), to ensure that the edge is sharp. Secondly, the intermittence of the convex and concave die is unreasonable, and the clearance of the ambassador side is mostly the wiping band. The gap is too small, and the two shear plane will appear. If the material hardness is too high, the material or the gap should be replaced.