Metal plate punching process

Abstract

The metal plate punching process has reasonable selection and design of punching interval, punching allowance, punching force and punching die edge structure to obtain high precision cross section quality of the punched part. The punching process may include once coarse punching and one or several times of finish punching, the coarse punching has parameter values similar to those of common punching process, and once finish punching has single side punching gap not greater than 0.5T%, where T is the material thickness. During several times of finish punching, the total single side punching allowance not smaller than the sunk angle width produced in the coarse punching, the punching die edge has one angle and one tangent arced notch to avoid the accumulation of cutting allowance, and the force is 10-30 MPa.

Description

【Technical field】 [0001] The invention relates to a sheet metal blanking process, in particular to a sheet metal blanking process which can obtain high-precision cross-section quality by using ordinary blanking principles. 【Background technique】 [0002] When the traditional sheet metal punching process punches or trims the sheet metal, it uses a common punching die to punch the sheet metal, such as figure 1 As shown, the section of the blanked part obtained by the ordinary blanking process is generally composed of four parts: the slump 1, the bright band 2, the tear band 3 and the burr 4, and the number of the bright band 2 determines the quality of the punched part section. [0003] In the punching process, the factors that affect the cross-section quality of the punched parts mainly include: the punching gap of the punch and die, the cutting allowance, the pressing force of the pressing device, and the structure of the punching die. If the gap is too small, the pressing ...

AI Technical Summary

Problems solved by technology

If it is necessary to obtain blanked parts with high cross-sectional quality, fine blanking is generally required. However, fine blanking equipment and technology must be introduced to adopt fine blanking. The equipment is expensive and increases the manufacturing cost of the product.

Another solution is to use CNC machine tools to machine the working end face of the blanking parts to obtain blanking parts with high-precision cross-sectional quality. Realize automated mass production, low production efficiency, unable to meet the needs of high production capacity of the factory

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