Separating stamping die and separating process for hot-molded steel plates

Abstract

A stamping die for separating a hot-formed steel plate comprises a lower die seat and a lower separation insert fixed on the lower die seat. A workpiece is positioned on the lower separation insert, an upper separation insert is arranged on an upper die seat, the upper die seat is fixedly connected on a press sliding block, a pressing block is elastically connected with the upper die seat, the sliding block is driven by a press to move up and down, the shape of the cutting edge surface of the lower separation insert is the same as the shape of the surface of the workpiece, the hardness of the upper separation insert is higher than or equals to the hardness of the lower separation insert, and the hardness of the upper separation insert and the lower separation insert is at least HRC 50 and tenacity is achieved. The invention also provides a corresponding separation technology, and a low speed separation technology and a cutting edge point contact separation technology are mainly used for the high-strength hot-formed steel plate. The stamping die for separating the hot-formed steel plate is suitable for the separation work of the hot-formed steel plate, separation efficiency is guaranteed, impact on the separation device is also reduced greatly during separation, abrasion to the separation device is reduced, the service life of the separation device is prolonged, and acting force needed during the separation can be reduced greatly.

Description

technical field [0001] The invention relates to the technical field of separation of thermoformed steel plates, in particular to a stamping die and separation process for trimming and / or punching high-strength and ultra-high-strength steel plates after thermoforming. Background technique [0002] High-strength steel plate has high strength, especially in the state of normalizing or normalizing plus tempering, it has high comprehensive mechanical properties. The application of high-strength steel plate is an effective means to ensure light weight and collision safety at the same time. , Power station equipment, medium and high pressure boilers, high pressure vessels, rolling stock, lifting machinery and other engineering industries are widely used. As a new thing, hot-formed steel plate is different from ordinary high-strength steel plate in its production process. The production process of hot-formed steel plate usually includes two stages of forming and quenching and coolin...

AI Technical Summary

Problems solved by technology

[0003] For the separation of hot-formed steel plates, if the traditional separation process of stamping dies is controlled by a press for ordinary steel plates and ordinary high-strength steel plates, as disclosed in the Chinese patent CN102189179A "a kind of automatic trimming and shaping two-in-one automobile stamping die And its stamping process" in the mold structure, the edge trimming punch and the edge of the trimming die are consistent with the shape of the workpiece, and the separation process can be completed instantly at a certain speed within one stroke. When the stamping is separated, the edge trimming The die and the workpiece are in line contact. Due to the high strength and high brittleness of the hot-formed steel plate, the stamping force is huge at the moment of stamping, which requires a large-tonnage press. Taking the body-in-white parts of the automotive industry as an example, it usually requires about 1,000 tons On the other hand, due to the instant completion of the separation process at a certain speed, the impact force at the moment of stamping is huge, the die is worn seriously, and the maintenance frequency is high. At the same time, in order to buffer, the press must be equipped with Cushion pads, even so, are still difficult to solve the problems of noise and mold wear caused by instantaneous huge changes in pressure. Therefore, most of the existing separation processes (including trimming and punching) of high-strength steel hot-formed steel plates use laser cutting processes

However, the laser cutting process requires the use of a laser cutting head, and a corresponding drive and transmission mechanism must be provided for each degree of freedom of the laser cutting head, such as the "laser cutting machine" disclosed in Chinese patent CN201483157U, whose cutting efficiency is limited The moving speed of the laser cutting head, compared with the traditional press and the separation device of the mold, the laser cutting process is not only costly, but also has low work efficiency

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