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Method for manufacturing universal joint for automobile

A manufacturing method and technology of universal joints, which are applied in the field of manufacturing universal joints for automobiles, can solve problems such as low production efficiency and high labor intensity of operators, and achieve the effects of convenient blank making, long service life and easy forging and molding

Inactive Publication Date: 2013-04-17
CHANGLI FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To produce this product in large quantities, the labor intensity of the operators is high, and the product quality depends entirely on human control and labor-intensive processes. It is not suitable to use this process, and the production efficiency is very low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] A method for manufacturing a universal joint for automobiles, comprising the following steps:

[0016] a) Prepare and cast bars with the following weight percentages: 0.27%≤C≤0.34%, 0.15≤Si≤0.35%, 0.71%≤Mn≤0.91%, 0.15≤P≤0.25%, 0.018≤S≤0.025%, 0.71%≤Cr≤0.95%, 0.30%≤Mo≤0.40%, 1.60≤Ni≤2.20%, 0.10≤Cu≤0.20%, the balance is Fe and unavoidable impurities, and the temperature of the casting bar is reduced to 300℃ , reheat to 670-760°C, hold for 3-5 hours, cool the furnace to 300°C, hold for 4 hours, reheat to 650-760°C, hold for 10 hours, cool to 400°C at 50°C / hour, and then cool at 20°C °C / hour, cooling to 140 °C;

[0017] b) The cold-temperature precision forging forming method is adopted. The specific process is to pre-form the bar forging billet by cold forging, preheat to 200°C-250°C, soak in graphite milk and then heat to 800°C-900°C, and perform warm forging;

[0018] c) The green body produced in step b) is heated to 980°C and kept for 1-2 hours, oil-cooled to not hig...

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Abstract

The invention discloses a method for manufacturing a universal joint for an automobile. The method comprises the following steps of preparing and casting a rod material by weight, wherein the rod material comprises C greater than or equal to 0.27% and less than or equal to 0.34%, Si greater than or equal to 0.15% and less than or equal to 0.35%, Mn greater than or equal to 0.71% and less than or equal to 0.91%, P greater than or equal to 0.15% and less than or equal to 0.25%, S greater than or equal to 0.018% and less than or equal to 0.025%, Cr greater than or equal to 0.71% and less than or equal to 0.95%, Mo greater than or equal to 0.30% and less than or equal to 0.40%, Ni greater than or equal to 1.60% and less than or equal to 2.20%, Cu greater than or equal to 0.10% and less than or equal to 0.20%, and the balance Fe and impurities. The method adopts a cool temperature finish forge forming method, a rod material forging stock is subjected to cold forging and preliminary shaping, preheated to 200-250 DEG C, dipped into aquadag and then heated to 800-900 DEG C, and subjected to warm forging shaping. The method is convenient to manufacture, high in efficiency, easy to forge and form, good in strength of a forged universal joint, long in service life, safe and reliable and suitable for large-scale production of various models of universal joints.

Description

technical field [0001] The invention relates to a method for manufacturing a universal joint, in particular to a method for manufacturing a universal joint for automobiles. Background technique [0002] In the automobile transmission system and other systems, in order to realize the power transmission between some shafts whose axes intersect or whose relative positions change frequently, universal transmissions must be used. The universal transmission device is generally composed of a universal joint and a transmission shaft, and sometimes there is an intermediate support, between the transmission and the drive axle of the front-engine rear-wheel drive car. When the distance between the transmission and the drive axle is long, the transmission shaft should be divided into two sections or even multiple sections, and an intermediate support should be added. Between the transfer case and the drive axle or between the drive axle and the drive axle of a multi-axis drive vehicle....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 杨奎琦陈正义张斌
Owner CHANGLI FORGING
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