Lubricating device of precisely-stamped die

Abstract

The invention relates to a device capable of effectively improving die lubrication in the fine-stamping process, in particular to a lubricating device of precisely-stamped dies. The lubricating device of the precisely-stamped dies comprises a pressure base plate of the precisely-stamped dies, a male die, a V-shaped blank holder and a reverse ejection rod. The pressure base plate is located above the male die. The reverse ejection rod is connected with a hydraulic plunger. The V-shaped blank holder is fixed to an upper die plate. A chamfer is arranged at the inner side, close to a cutting edge of the male die, of the V-shaped blank holder. An oil storage groove is formed between the V-shaped blank holder and the male die. A chamfer is arranged at the outer side, close to the cutting edge of a female die, of the reverse ejection rod and an oil storage groove is formed between the reverse ejection rod and the female die. The lubricating device of the precisely-stamped dies is characterized in that a vibration generating device is fixed to the portion between the pressure base plate and the male die. Lubricating oil in the oil storage grooves is continuously led to a friction face through vibration. The lubricating device of the precisely-stamped dies can effectively improving the lubricating effect in the composite fin-stamping forming process and prolong the service of the dies.

Description

technical field [0001] The invention relates to a device capable of effectively improving mold lubrication in the fine blanking process. Background technique [0002] Fine blanking is a blanking process in which the material is completely subjected to pure shear deformation under three-dimensional pressure to obtain a high-quality section. In the process of fine blanking, plastic deformation occurs in the narrow deformation zone composed of blank holder, die, punch and reverse ejector. For fine blanking deformation, the gap between the convex and concave dies is very small, so the forming force is very large (about 3 times that of ordinary punching), and the temperature in the plastic deformation zone is high, and the friction pressure is large. These factors can easily cause the fine blanking die to fail, so the die must be fully lubricated during the fine blanking process, otherwise the life of the die will be greatly shortened and the quality of the fine blanking parts w...

AI Technical Summary

Problems solved by technology

However, relying on these three mechanisms alone, the introduction of lubricant is not enough, and dry friction still occurs during the fine blanking process. This harmful phenomenon is more prominent in the fine blanking of thick plates.

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