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Remanufacturing method for machining bolt punching needles through nut punching bars

A remanufacturing and bolt punching technology, which is applied in the field of fastener mold manufacturing, can solve the problems of large quality differences and large fluctuations in service life, and achieve the effects of improving service life and saving high-speed steel materials

Inactive Publication Date: 2018-12-07
LENGSHUIJIANG TIANBAO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this type of punching needle is vacuum heat treated with a nut punch after machining. The quality difference after heat treatment is large, and the service life fluctuates greatly. The service life is between 30 and 100 thousand times.

Method used

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  • Remanufacturing method for machining bolt punching needles through nut punching bars
  • Remanufacturing method for machining bolt punching needles through nut punching bars
  • Remanufacturing method for machining bolt punching needles through nut punching bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0022] In this example, if Figure 1 to Figure 5 As shown, the remanufacturing method of nut punching rod processing bolt punching pin in the embodiment of the present invention, according to the similar working environment and force characteristics of nut punching rod and bolt punching pin, after the nut punching rod reaches the service life and wears out, According to the principle of similar size, the nut punch rod is remanufactured into the punch pin of the M6~M12 series hexagonal flange bolt.

[0023] According to the principle of similar size, the rear punch rod of the fourth sequence of the worn out nut is selected as the object of remanufacturing. The following table shows the typical remanufacturing data.

[0024] Remanufacturing object

Remanufacturing object size

remanufactured product

Product size after remanufacturing

...

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Abstract

The invention discloses a remanufacturing method for machining bolt punching needles through nut punching bars. The method includes the following steps that the nut punching bars capable of being remanufactured into the bolt punching needles are separated; the head portion of each nut punching bar is cut off; the two ends are machined to form hexagonal structures; the middle is cut off to form twobolt punching needle blanks; and the bolt punching needle blanks are machined to form bolt punching needle finished products. According to the remanufacturing method for machining the bolt punching needles through the nut punching bars, due to the fact that the nut punching bars losing efficacy are machined into the bolt punching needles, a valuable high-speed steel material can be remarkably saved, the procedures of discharging, annealing, vacuum heat treatment and the like are saved, the punching needle disqualification problem caused by the material quality problem and the heat treatment problem are basically eliminated, and the service life of the bolt punching needles can be obviously prolonged.

Description

technical field [0001] The invention relates to the field of fastener mold manufacturing, in particular to a remanufacturing method for processing bolt punching pins from nut punching rods. Background technique [0002] At present, hexagonal nuts within M10~M24 are generally produced by high-speed cold heading machines. High-speed cold heading machines have the characteristics of high speed, high precision, and high stability. High-speed cold heading machines use high-speed steel with good toughness to make front punches ( 5~6 sequence is a group) and back punch (5~6 sequence is a group). During the nut forming process, the front punch mainly bears the impact load, and the rear punch mainly bears the axial back pressure and tensile load. Due to the difference in force, the back punch is mainly caused by the wear and failure of the head of the punch. After the wear reaches a certain level, it will be scrapped and treated as high-speed steel scrap. [0003] Hexagonal flange ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 付平安黄振
Owner LENGSHUIJIANG TIANBAO IND
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