Method for manufacturing high-intensity internal multi-tooth hexagonal-head flange-face bolt

A flange face bolt and manufacturing method technology, applied to bolts, threaded fasteners, connecting components, etc., can solve the problems of difficult processing, waste of raw materials, and numerous processes, and achieve high production efficiency, quality assurance, and cost reduction Effect

Inactive Publication Date: 2011-08-17
宁波拓隆精密模具有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] High-strength internal multi-tooth hexagon head flange bolt is a new type of expansion product. The traditional technology is processed by, turning, and punching. Not only are there many procedures, the processing is difficult, and the efficiency is low. High. In the past, the high-strength internal multi-tooth hexagon head flange bolts were made of ordinary wire material, which contained many impurities and was easy to break during use.

Method used

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  • Method for manufacturing high-intensity internal multi-tooth hexagonal-head flange-face bolt
  • Method for manufacturing high-intensity internal multi-tooth hexagonal-head flange-face bolt

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Embodiment Construction

[0014] see figure 1 , a method for manufacturing high-strength internal multi-tooth hexagon head flange bolts, firstly phosphate surface-treating the round material of high-strength internal multi-tooth hexagon head flange bolts, and then roughing the high-strength internal The raw material of multi-tooth hexagon head flange bolts is subjected to spheroidizing annealing, phosphate film treatment, fine drawing and sizing, and finally cold heading forming treatment process, including the following steps:

[0015] 1) Automatically cut the disc round material 1 after precision drawing and sizing into a single high-strength internal multi-tooth hexagon head flange bolt blank 2 in the cold heading machine;

[0016] 2) Send the high-strength internal multi-tooth hexagonal head flange bolt blank 2 into the cold heading machine, shrink the rod to form the tapping diameter of the threaded part, and form a chamfer 7 at the joint;

[0017] 3) Flip the two ends of the high-strength intern...

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Abstract

The invention discloses a method for manufacturing a high-intensity internal multi-tooth hexagonal-head flange-face bolt. The method comprises the following steps of: firstly, performing phosphate surface treatment on a round plate material of the high-intensity internal multi-tooth hexagonal-head flange-face bolt; then performing spheroidizing annealing, phosphate epithelium treatment, and definite extraction and sizing on a roughly extracted blank material of the high-intensity internal multi-tooth hexagonal-head flange-face bolt; and finally performing a cold heading and forming treatment working procedure. By the adoption of a cold header for forming at one time, the raw material during processing has no loss, so the raw material is saved, the cost is reduced, the quality of the high-intensity internal multi-tooth hexagonal-head flange-face bolt is enhanced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of cold heading, in particular to a method for manufacturing high-strength internal multi-tooth hexagon head flange bolts. Background technique [0002] High-strength internal multi-tooth hexagon head flange bolt is a new type of expansion product. The traditional technology is processed by, turning, and punching. Not only are there many procedures, the processing is difficult, and the efficiency is low. High. In the past, the high-strength internal multi-tooth hexagon head flange bolts were made of ordinary wire material, which contained many impurities and was easy to break during use. Contents of the invention [0003] The purpose of the present invention is to provide a method for manufacturing high-strength internal multi-tooth hexagonal head flange bolts, which is formed by a cold heading machine at one time, without loss of raw materials during processing, saving raw materials, reducing costs, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21K1/46
Inventor 张金清孙文成
Owner 宁波拓隆精密模具有限公司
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