A kind of plum blossom inner hexagonal punching needle and preparation method of needle

A technology of punching pins and plum blossoms, which is applied in the field of metal stamping, can solve the problems of fast solidification, poor fluidity, and burrs, and achieve the effects of good product consistency, reduced production costs, and reduced production costs

Active Publication Date: 2020-09-29
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in powder injection molding, cemented carbide has low feeding strength and density, and poor fluidity. The injection process is a non-isothermal, non-uniform, and unsteady complex flow process of non-Newtonian fluid, which shows poor fluidity and solidification speed. Fast, easy to cause insufficient filling of the cavity, easy breakage of the blank, and structural defects such as under-injection, holes, deformation, fracture, burrs, sandwiches, density gradients, surface defects, and uneven single weight

Method used

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  • A kind of plum blossom inner hexagonal punching needle and preparation method of needle
  • A kind of plum blossom inner hexagonal punching needle and preparation method of needle
  • A kind of plum blossom inner hexagonal punching needle and preparation method of needle

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Embodiment 1

[0034] M6 plum-blossom inner hexagonal punching needle and the preparation method of the needle head

[0035] A kind of M6 plum blossom inner hexagonal punching needle, the plane front view is as follows figure 1 As shown, the plane right view is as figure 2 As shown, the punching needle is an A-type punching needle, including a T head 1, a needle bar 2 and a needle head 3. The dimensions of each part of the punching needle are L1:L2=4:3, H=2.5P=1.5D, P=6mm, T / P=1.04, and the plum blossom structure 4 on the front end of the needle head 3 has a depth of 2mm, 3mm diameter concave hole; where T, L1, L2 represent the lengths of T head 1, needle bar 2, and needle head 3 respectively; H, D, and P represent the diameters of T head 1, needle bar 2, and needle head 3.

[0036] The material of the T head 1 and the needle bar 2 is high-speed steel, and the material of the needle 3 is WC-Co hard alloy, and the two parts are connected by welding wire. Among them, the raw material compo...

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Abstract

The invention belongs to the technical field of metal punching and particularly relates to a plum blossom type inner hexangular punch needle and a preparation method of a needle head. The plum blossomtype inner hexangular punch needle is an A type punch needle and comprises a T-shaped head, a needle rod and the needle head; the T-shaped head and the needle rod are made of high-speed steel materials; the needle head is made of a hard alloy material, and the hard alloy material comprises, by mass, 92.5%-94.5% of mixed powder and 5.5%-7.5% of forming agents, wherein the mixed powder comprises 83.5%-88.5% of WC and 11%-16% of Co and further comprises 0.3%-0.65% of Cr3C2 or VC; and the forming agents are composed of paraffin, low-molecular coupling agents and high molecular polymers. The preparation method of the needle head comprises the processes of ball milling, mixing, pelletizing, injection forming, degreasing, sintering and the like. According to the plum blossom type inner hexangular punch needle, properties of strength, hardness, high-temperature resistance, abrasion resistance, toughness and the like are excellent, the production cost is low, the service life is long, the product consistency is good, and the rejection rate is lower than 0.3%.

Description

technical field [0001] The invention belongs to the technical field of metal stamping, in particular to a method for preparing a plum-blossom inner hexagonal punching needle and a needle head. Background technique [0002] In cold stamping processing, stamping dies are used to process metal or non-metal materials into parts or semi-finished products. The punching needle, also known as the punching head, is an indispensable accessory in the work of the stamping die, and belongs to the replaceable die consumable; the punching needle installed on the stamping die performs continuous punching and punching operations, so that the processed material is separated or plasticized Deformation to obtain the desired finished or semi-finished products. [0003] At present, the materials used for the actual production of punching pins are mainly steel or hard alloy. In the production of large-scale hardware products, there are defects such as wear, deformation, and sticking materials, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F3/10B22F5/00B22F9/04C22C1/05C22C29/08B21D37/01
CPCB21D37/01B22F3/1007B22F3/1021B22F3/225B22F5/00B22F9/04B22F2009/041C22C1/051C22C29/005C22C29/08
Inventor 谢兴铖曹瑞军林中坤
Owner GRIMAT ENG INST CO LTD
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