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Cold forming multi-station die for hollow rivet rivet

A cold forming, multi-station technology, applied in the direction of rivets, connecting components, etc., can solve the problems that the upsetting extrusion method cannot meet the requirements, and the double-click die or the one-die two-punch process cannot be used, so as to reduce the production cost and achieve high efficiency. production effect

Pending Publication Date: 2020-10-02
DONGFENG MOTOR FASTENER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This product is a hollow part with a large head and a thin rod. It is completely different from the traditional solid rivet and semi-hollow rivet. Requirements) There are strict requirements on the dimensional accuracy of the inner and outer diameters of the collar, and a single upsetting and extrusion method cannot meet the requirements

Method used

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  • Cold forming multi-station die for hollow rivet rivet
  • Cold forming multi-station die for hollow rivet rivet
  • Cold forming multi-station die for hollow rivet rivet

Examples

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Embodiment Construction

[0018] Such as figure 2 As shown, a multi-station die for cold forming of a hollow blind rivet includes a shaping die 4, a pre-forming die 5, a floating composite extrusion die 6, a floating finishing die 7 and punching dies arranged sequentially from right to left. Hole die 8, the shaping die is used for flattening the two ends of the disc material and the chamfering of the lower end (such as Image 6 shown), the preform die is used to extrude the nail shank (such as Figure 7 shown), the floating composite extrusion die is used to extrude the wrinkled nail head and the cavity in the nail shank (such as Figure 8 shown), the floating finishing die is used for finishing nail heads and shanks (such as Figure 9 shown), the punching die is used to punch out the cavity in the nail head (such as figure 1 shown);

[0019] Such as image 3 with Figure 4 As shown, the floating composite extrusion die 6 is made up of an upper die and a lower die; as Figure 5 As shown, the st...

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Abstract

The invention discloses a cold forming multi-station die for a hollow rivet rivet. The cold forming multi-station die is composed of a sizing die, a pre-forming die, a floating type composite extrusion die, a floating type finishing die and a punching die. The rivet is formed in the secondary floating process, the requirements for the shape and the size of a rivet head and a rivet rod are met, theprecision reaches 0.05 mm, the production efficiency can reach 100-120 pieces per minute, efficient production is achieved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of cold forming molds for rivets, in particular to a multi-station mold for cold forming hollow rivets. Background technique [0002] Such as figure 1 The hollow blind rivet shown is an integral body composed of a nail head 1 and a nail shank 2 , and a cavity-shaped stepped hole 3 inside the nail head and the nail shank. [0003] This product is a hollow part with a large head and a thin rod. It is completely different from the traditional solid rivet and semi-hollow rivet. Requirements) There are strict requirements on the dimensional accuracy of the inner and outer diameters of the collar, and a single upsetting and extrusion method cannot meet the requirements. Contents of the invention [0004] The invention provides a multi-station die for cold forming of a hollow blind rivet, and the purpose is to make the shape and size of the product meet the requirements. [0005] In order to solve the problems of the te...

Claims

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Application Information

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IPC IPC(8): B21K1/60
CPCB21K1/60
Inventor 何利武姚继福成伟金秋罗勇
Owner DONGFENG MOTOR FASTENER CO LTD
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