Unlock instant, AI-driven research and patent intelligence for your innovation.

Step mould for cold heading machine and using method of step mould

A cold heading machine and mold technology, applied in the direction of manufacturing tools, forging/pressing/hammering machines, forging/pressing/hammer devices, etc., can solve problems such as inability to perform upsetting, brittle fracture, and plastic bending of ejector pins, etc., to achieve Reduce processing difficulty, reduce difficulty, and have good structural stability

Active Publication Date: 2015-12-09
AEROSPACE PRECISION PROD INC LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the cold heading forming process, for the cold heading products of slender rods, especially the cold heading products with both slender rods and high hardness, since the aspect ratio of the ejector rod of the lower die exposed to the outer part of the lower die is very large, the forming The strength of the head is very large, and the ejector pin will be subjected to a large bending moment transmitted by the product, which can easily lead to plastic bending or brittle fracture of the ejector pin, resulting in the failure of upsetting

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Step mould for cold heading machine and using method of step mould
  • Step mould for cold heading machine and using method of step mould
  • Step mould for cold heading machine and using method of step mould

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, in this embodiment, the lower mold of the cold heading machine is integrated, and the die hole of the lower die is made into two parts: the front part of the die hole 1-1, and the rear part of the die hole 1-2. The aperture size of the front portion 1-1 of the die hole is equal to the aperture size of the usual lower die, the aperture size of the rear portion 1-2 of the die hole is smaller than the aperture size of the front portion 1-1 of the die hole, the front portion of the die hole 1-1 and the die hole A right-angled step surface 1-3 is made between the hole rear portion 1-2.

[0028] Such as Figure 4 As shown, the method of using a stepped die for a cold heading machine in this embodiment is as follows: during cold heading forming, the end face 1-4 of the end of the push rod that goes deep into the lower die is set on the right-angled step face 1-3 of the lower die. rear side. In this way, when the product head is formed, the axial f...

Embodiment 2

[0030] Such as figure 2 As shown, the present embodiment makes the lower die of the cold heading machine into two parts: the front part of the lower die with the front part of the die hole 2-1, the rear part of the lower die with the rear part of the die hole 2-2. The aperture size of the die hole front portion 2-1 is equal to the usual lower die aperture size, and the aperture size of the die hole rear portion 2-2 is smaller than the aperture size of the die hole front portion 2-1. When the lower die is installed and used, a right-angled step surface 2-3 will appear between the die hole front part 2-1 and the die hole rear part 2-2.

[0031] Such as Figure 5 As shown, the method of using a stepped die for cold heading machine in this embodiment is: align the front part of the lower die with the rear part of the lower die and put them into the cold heading machine, and insert the ejector pin deep into the lower die during cold heading forming. The end face 2-4 of one end i...

Embodiment 3

[0034] Such as image 3 As shown, in this embodiment, the lower mold of the cold heading machine is integrated, and the inner carbide mold in the lower mold is made into two parts: the front part of the cemented carbide inner mold with the front part of the die hole 3-1 , Carbide internal mold rear part with die hole rear part 3-2. The aperture size of die hole front portion 3-1 is equal to the usual lower die aperture size, the aperture size of die hole rear portion 3-2 is smaller than the aperture size of die hole front portion 3-1, the die hole front portion 3-1 and the die hole A right-angled step surface 3-3 is made between the hole rear portions 3-2.

[0035] Such as Figure 6 As shown, the method of using a stepped die for a cold heading machine in this embodiment is as follows: during cold heading forming, the end face 3-4 of the end of the push rod that goes deep into the lower die is set on the right-angled step face 3-3 of the lower die. rear side. This makes th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a step mould for a cold heading machine and a using method of the step mould. The step mould comprises a lower mould and an ejecting rod matched with the lower mould. The lower mould comprises an inner mould body and an outer mould body. The inner mould body is arranged in the outer mould body. The outer mould body and the inner mould body share the same central axis. The inner mould body is made of hard alloy. A step type mould hole is formed in the inner mould body. The step is a right-angled step. The inner diameter of the portion, close to the inserted end of the ejecting rod, of the step type mould hole is smaller than that of the portion, away from the inserted end of the ejecting rod, of the step type mould hole. The portion, close to the inserted end of the ejecting rod, of the mould hole in the inner mould body extends to the end face, close to the inserted end of the ejecting rod, of the outer mould body. The diameter of the large-diameter portion of the mould hole is the same as the diameter of an existing lower mould hole. By the adoption of the step type mould hole structure, in the heading process, the ejecting rod does not bear axial pressure or bears extremely low axial pressure, thereby being not prone to bending or fracturing any more, and finally the heading process of an ultra-long thin rod high-hardness product can be conducted smoothly.

Description

technical field [0001] The invention belongs to the field of cold heading equipment, in particular to a step mold for cold heading machines. Background technique [0002] Cold heading machine is a common equipment with high production efficiency and less cutting or no cutting. Its internal mold structure is the key to ensure the quality of heading. The function of the ejector pin is to eject the product formed in the die. During the cold heading forming process, for the cold heading products of slender rods, especially the cold heading products with both slender rods and high hardness, since the aspect ratio of the ejector rod of the lower die exposed to the outer part of the lower die is very large, the forming The strength of the head is very large, and the ejector pin will be subjected to a large bending moment transmitted by the product, which can easily lead to plastic bending or brittle fracture of the ejector pin, resulting in the failure of upsetting. Contents of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B21J13/02B21J5/08B21J13/14
CPCB21J5/08B21J13/02B21J13/14
Inventor 郭双双马玲郭云楼张晓斌贾晓娇
Owner AEROSPACE PRECISION PROD INC LTD