Metal plate punching process

A blanking and process technology, which is applied in the field of sheet metal blanking process with high-precision section quality, can solve the problems of increasing product manufacturing cost, low production efficiency, and inability to meet the high production capacity of the factory, so as to achieve the effect of ensuring productivity and saving high costs
CN1672830AInactive Publication Date: 2005-09-28HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
Publication Date
2005-09-28
Estimated Expiration
Not applicable · inactive patent

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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.
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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 ...

Claims

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