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Machining tool and machining method for bullet type self-drilling bolt

A technology for processing tools and bullet heads, applied in bolts, threaded products, metal processing equipment, etc., which can solve the problems of excessive chips, low production efficiency, and poor groove consistency.

Pending Publication Date: 2021-06-08
SHANGHAI AUTOCRAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to production efficiency and other requirements, the bullet-shaped self-drilling bolt needs to be turned by a CNC lathe after cold heading the blank. There are many chips during processing, which wastes raw materials and high cost; and increases the process, low production efficiency, and processing The slot consistency is not good

Method used

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  • Machining tool and machining method for bullet type self-drilling bolt
  • Machining tool and machining method for bullet type self-drilling bolt
  • Machining tool and machining method for bullet type self-drilling bolt

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Embodiment Construction

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] Such as Figure 1-6 As shown, a processing tool for a bullet-type self-drilling bolt includes a fixed plate 1 and a moving plate 2, and the working surfaces of the fixed plate 1 and the moving plate 2 are provided with mutual cooperation for extruding and forming the bolt shank. The tooth rubbing 3 of the thread, the working surface of the fixed plate 1 and the moving plate 2 are provided with a forming area 4 that cooperates with each other to extrude the tail of the bolt to form a bullet shape. The width and section arc of the forming area 4 are along the The direction from the entrance to the exit is increasing.

[0031] Specifically, the forming area 4 is located below the tooth rubbing 3 .

[0032] Specifically, the forming area 4 is sequentially divided into the occlusal area 5, the sharpening ...

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Abstract

The invention discloses a machining tool and a machining method for a bullet type self-drilling bolt, and relates to the technical field of fastener product production. The working surfaces of a fixed plate and a movable plate are provided with rolling teeth which are matched with each other and are used for extruding and forming threads on the rod part of the bolt and forming areas which are matched with each other and are used for extruding and forming bullets on tail part of the bolt, and the rod part of the bolt is extruded and formed by utilizing the rolling teeth and the forming areas, so that the rod part threads and the tail part bullets are formed. By means of the device, the bolt can be formed at a time, the production efficiency is greatly improved, machining raw materials are saved, the cost is reduced, the consistency of the produced bolt is good, and the quality is improved.

Description

technical field [0001] The invention relates to the technical field of fastener product production, in particular to a processing tool and a processing method for bullet-shaped self-drilling bolts. Background technique [0002] Bolts and screws are the most basic mechanical components and are used in various industries such as automobiles, industrial machinery, and construction. Unlike welding and riveting, the biggest feature of bolts is that they can be easily removed even after tightening, and can be reused by retightening. [0003] Among them, the forming of bolts can be processed by cold heading plastic processing. Compared with cutting processing, the metal fiber (metal wire) is continuous along the shape of the product without cutting in the middle, thus improving the product strength and especially excellent mechanical properties. [0004] However, due to production efficiency and other requirements, the bullet-shaped self-drilling bolt needs to be turned by a CNC l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21H3/06B21K1/46B21J5/00B21J5/08
CPCB21H3/06B21J5/002B21J5/08B21K1/46
Inventor 燕存露尤新增肖军周剑强
Owner SHANGHAI AUTOCRAFT