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Blanking forming technical method for processing step holes by adopting smooth feeding mold

A technology of mold processing and stepped holes, which is applied in the field of mechanical processing, punching and forming, and can solve problems such as the inability to realize automatic production

Inactive Publication Date: 2015-04-29
TIANJIN JINRONG TIANYU PRECISION MACHINERY CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of automated production cannot be realized by using the existing traditional technology

Method used

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  • Blanking forming technical method for processing step holes by adopting smooth feeding mold
  • Blanking forming technical method for processing step holes by adopting smooth feeding mold
  • Blanking forming technical method for processing step holes by adopting smooth feeding mold

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Embodiment Construction

[0023] Such as Figure 1.1 , 1.2 One of the parts shown is the static contact in the circuit breaker product. The material of the part is pure copper and semi-hard; the thickness of the material is 1±0.03mm.

[0024] Due to assembly and functional requirements, there are two precision stepped holes in the part drawing. The diameter of the stepped hole is 2.6±0.03mm on the front, the depth is 0.65±0.03mm, and the depth on the back is 0.25±0.03mm*45 degrees. The diameter is 2.1±0.03mm, and the position accuracy of the two stepped holes in the X-axis direction and the Y-axis direction are both ±0.02mm.

[0025] Adopt the overall structure requirements of the mold: in order to meet the shape and dimensional accuracy requirements of the step hole of the part, it is necessary to design a six-step forming structure. In order to ensure the position accuracy of each step of the forming structure and the position accuracy of the two step holes, the overall structure of the mold is devel...

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Abstract

The invention provides a blanking forming technical method for processing step holes by adopting a smooth feeding mold. The mold adopts a double-guide structure, a guide nail is adopted between material belt process steps for precise positioning, and the positioning precision is + / -0.005mm. The method adopts the following six process steps for hole punching and forming: (1) hole pre-punching; (2) step forming; (3) hole punching; (3) chambering; (5) shaping; (6) fine hole trimming. An upper die punching head is adopted, and holes with the diameter being 2.1mm are finely trimmed. The method has the effects that the mold structure and the production process methods are adopted, the punching speed can reach higher than 100 times / minute, and the dimension precision and the position precision of the step holes meet drawing requirements.

Description

technical field [0001] The invention belongs to machining punching and forming, and in particular relates to a punching and forming technology method for processing stepped holes with a forward-feeding mold. Background technique [0002] One part is the static contact in the circuit breaker product. Due to assembly and functional requirements, there are two precision step holes in the part drawing. The diameter of the step hole is 2.6±0.03mm on the front, 0.65±0.03mm deep, and The chamfer of 0.25±0.03mm*45 degrees, the diameter of the middle hole is 2.1±0.03mm, and the position accuracy of the two stepped holes in the X-axis direction and the Y-axis direction are both ±0.02mm. A large number of automated production cannot be realized by using existing traditional techniques. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a punching forming method using a forward-feeding mold to process step holes. Realize the ...

Claims

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Application Information

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IPC IPC(8): B21D35/00
Inventor 戚志华
Owner TIANJIN JINRONG TIANYU PRECISION MACHINERY CO LTD
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