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

Inactive Publication Date: 2005-09-28
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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Embodiment Construction

[0016] The sheet metal stamping process of the present invention is to obtain a blanking piece with high-precision cross-section quality through reasonable selection and design of the blanking gap, punching allowance, pressing force and punch edge structure. It is not only suitable for aluminum and copper materials with a thickness of 2mm to 12mm, but also suitable for punching and edge trimming of low-carbon steel materials with a carbon content of less than 0.15%.

[0017] In order to ensure the smoothness of the section of the blanking part and minimize the influence of factors such as blanking gap, cutting allowance, and pressing force on the quality of the section of the blanking part, the blanking part can be roughly machined once, and then finished one or several times . In rough machining, each parameter value can be the same or similar to that in ordinary blanking process.

[0018] The blanking gap has a great influence on the section quality of the punched part. To ...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D28/00B21D28/16B23D15/00B26D1/00
CPCB23D15/00B21D28/16Y10T83/04
Inventor 柳志达
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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