Powder-metallurgy release yoke and manufacturing method thereof

A technology of powder metallurgy and manufacturing method, which is applied in the direction of transmission device control, components with teeth, belt/chain/gear, etc. It can solve the problems of low product qualification rate, complicated process, and cost of materials, so as to improve the appearance quality, The effect of high production efficiency and low overall cost

Inactive Publication Date: 2011-05-11
江苏双峰粉末冶金制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two manufacturing methods can produce separation forks that meet the requirements of use, but there are also obvious disadvantages, that is, the proce

Method used

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  • Powder-metallurgy release yoke and manufacturing method thereof
  • Powder-metallurgy release yoke and manufacturing method thereof
  • Powder-metallurgy release yoke and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.8% C by weight and a small amount of micro-wax powder to 1 part of Fe powder, stir evenly, prepare rigid metal powder, fill it into a preset mold, and press it into an alloy blank under a pressure of 5-9tf / cm2. The billet is sintered at high temperature, the temperature is 1150-1200°C, and it is kept in a reducing gas for 1.5-3h; it is cooled to room temperature in a water jacket; the formed billet is placed in a finishing mold for further extrusion, and finally a small amount of local cutting and trimming set shape. The carbon steel separation fork manufactured in this embodiment is easy to process, but carburizing and quenching is still required to improve the wear resistance of the separation fork.

Embodiment 2

[0033] Fill the alloy powder with a particle size ≥100 mesh into the prefabricated mold, seal and stir evenly, and the ingredients are 3.5% Cu, 2.5% Ni, 2% Mo, 0.8% C, and a small amount of micro wax powder by weight , and the rest is Fe powder. Pressed into an alloy steel blank under a pressure of 7tf / cm2; the blank was sintered at a high temperature of 1180±2°C, and kept in a reducing gas for 2.5h; cooled to room temperature through a water jacket; the formed blank was put into finishing Further extrusion in the mold; finally a small amount of local cutting, trimming and setting.

[0034] Compared with Embodiment 1, this embodiment can save a large amount of raw materials and processing man-hours, improve the processing accuracy of the product, and improve the tensile strength and wear resistance of the product.

Embodiment 3

[0036] Fill the alloy powder with a particle size of ≥100 mesh into the prefabricated mold, and the proportion of each component by weight is: 4.5% Cu, 3% Ni, 3% Mo, 0.8% C, a small amount of micro wax powder, and the rest is Fe powder; pressed into an alloy steel billet under a pressure of 8tf / cm2; the billet was sintered at a high temperature of 1180±2°C, and kept in a reducing gas for 2.5h; cooled to room temperature through a water jacket; the formed billet was placed in Further extrusion in the finishing mold; finally, a small amount of local cutting, trimming and setting.

[0037] Compared with Example 1, this embodiment can save a large amount of raw materials, save processing man-hours, save product cost, improve the tensile strength and wear resistance of the product, and improve the impact toughness index.

[0038] Such as figure 1 and figure 2 As shown, a powder metallurgy separation fork is composed of a separation fork main body 1 and two separation fork arms 2...

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Abstract

The invention relates to a powder-metallurgy release yoke and a manufacturing method thereof. The manufacturing method provided by the invention comprises the following steps: adding alloy elements C, Cu, Ni and Mo into an iron base material to make an alloy steel blank, sintering at high temperature, cooling, extruding by using a sizing die, and finally carrying out slight cutting and finishing to form. The powder-metallurgy release yoke is composed of a release yoke body and two release yoke arms, wherein the joints of the release yoke arms and the release yoke body are provided with opposite grooves. Compared with the prior art, the invention greatly reduces the material consumption, shortens the working time, can satisfy the requirements for strength and wearability of the release yoke without carburization and quenching, and overcomes the defects of deformation, discoloration and the like caused by quenching in the existing machining method. The invention further enhances the appearance quality and precision of the product, lowers the comprehensive cost of the technique and product, and enhances the production efficiency.

Description

technical field [0001] The invention relates to a separation fork of an automobile clutch and a manufacturing method thereof, in particular to a powder metallurgy separation fork and a manufacturing method of the separation fork. Background technique [0002] The release fork is a special-shaped component for matching in the automobile clutch. The release fork of the existing automobile clutch is usually made of 45 steel or cast steel, and needs to go through multiple procedures such as mechanical cutting, carburizing and quenching during processing. Both of the above two manufacturing methods can process splitting forks that meet the requirements of use, but there are also obvious disadvantages, namely complex process, waste of materials, time-consuming, and low pass rate of products processed by multi-process mechanical cutting. When the separation fork is manufactured in batches, the material used for a single piece is 1248 grams, and the labor time is more than 2 hours,...

Claims

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Application Information

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IPC IPC(8): F16H63/30
Inventor 丁峰陆秀明李勇
Owner 江苏双峰粉末冶金制品有限公司
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