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Cold heading device and cold heading process for forming screw and screw

A cold heading and screw technology, which is applied in the direction of screws, forging/pressing/hammer devices, bolts, etc., can solve the problems of long manufacturing time, high labor cost, and low product qualification rate, so as to reduce secondary processing and improve production efficiency Effect

Pending Publication Date: 2019-12-17
BINKE AUTOMOBILE FASTENER KUNSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adopting two production processes like this makes the production process complex and has many procedures, and the manufacturing time is long
In addition, the cold heading and punching mold clamping processes need to be coordinated, so the quality requirements for the cold heading and mold clamping processes are higher, and the requirements for dimensions are more stringent, resulting in a lower pass rate of the product and extremely difficult adjustments
In the prior art, the production of products with large flanges in the middle requires complex manufacturing process, high labor cost, long manufacturing time, and low pass rate of products, so it is urgent to solve the above technical problems in the prior art

Method used

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  • Cold heading device and cold heading process for forming screw and screw
  • Cold heading device and cold heading process for forming screw and screw
  • Cold heading device and cold heading process for forming screw and screw

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046]In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "inner" and "outer" are based on the orientation or positional relationship shown in the drawings , is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation...

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Abstract

The invention discloses a cold heading device for forming a screw. The screw is provided with a rod portion and a head portion. A thread rolling rod is arranged at one end of the rod portion, the other end of the rod portion is connected with the head portion, and a flange portion is arranged on the portion, between the thread rolling rod and the head portion, of the rod portion. The cold headingdevice is used for cold-heading a wire into the screw. The cold heading device comprises a first die for forming an arc chamfer on the tail of the wire, a second die for forming the thread rolling rodon the tail of the wire, a third die for preforming the head portion, a fourth die for forming the head portion and a groove type in the head portion, a fifth die for detecting whether breakage exists in the groove type or not and a sixth die for forming the flange portion in the middle. By means of the cold heading device, the screw of the flange portion with the large size in the middle can beformed at a time, and secondary machining of a punch is omitted.

Description

technical field [0001] The invention relates to the field of fastener manufacturing, in particular to a cold heading device and a cold heading process for forming screws. Background technique [0002] Generally, when producing cold heading parts with a large middle and small ends, it is usually necessary to cold-head the material first, and then to turn the material or punch the secondary processing to form the large flange in the middle. Adopting two kinds of production techniques like this makes the production technique complex and has many procedures, and the manufacturing time is long. In addition, the cold heading and punching mold clamping processes need to be coordinated, so the quality requirements for the cold heading and mold clamping processes are higher, and the size requirements are more stringent, resulting in a lower pass rate of the product and extremely difficult adjustments. In the prior art, the production of products with large flanges in the middle requ...

Claims

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Application Information

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IPC IPC(8): B21K1/44B21J13/02F16B35/00
CPCB21K1/44B21J13/02F16B35/00
Inventor 王坤路凤
Owner BINKE AUTOMOBILE FASTENER KUNSHAN
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