Automotive transmission gear forging method

A technology for automotive transmissions and gears, applied in the field of gear forging, can solve the problems of low safety factor, low investment, and low effective utilization rate of production materials, and achieve the effects of smooth surface quality, improved service life, and superior mechanical properties

Inactive Publication Date: 2015-11-04
苏州优金金属成型科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of car's wheel made from steel called Gears was found that had better strength compared to older methods like casting or machining. It also improved its durability over time due to less oxides on it during use. Additionally, this technology could be used at lower costs than traditional ways such as making castings instead of plates.

Problems solved by technology

The technical problem addressed in this patented solution is that current processes used during manufacturing of automobiles' transmissions are complicated with poor efficiency due to issues such as martensitic crystal formation caused by rapid changes between speeds or loads over time. This can lead to decreased durability and reduced performance of these parts being produced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for forging an automobile transmission gear, comprising the following steps,

[0027] Step 1, blanking, wherein low-carbon steel is selected for heating through a high-frequency electric furnace, and the heating temperature is 1100°C-1300°C;

[0028] Step 2. Process the green body through the cold pressing mold, and use the standard tooth mold to correct the forming teeth;

[0029] Step 3, carburizing, quenching, comprises the following steps,

[0030] Step 1) The blank is preheated, the preheating temperature is controlled at 330°C-380°C, firstly, the blank is degreased to remove surface impurities, secondly, the blank is pre-oxidized to ensure a uniform carburized layer, and finally the blank is It can slow down the heating speed, reduce the unevenness of heating temperature and stress at different positions of different blanks, and reduce the deformation of heat treatment;

[0031] Step 2) Heating and heat preservation, the continuous heating temperature is c

Embodiment 2

[0042] A method for forging an automobile transmission gear, comprising the following steps,

[0043] Step 1, blanking, wherein low-carbon steel is selected for heating through a high-frequency electric furnace, and the heating temperature is 1100°C-1300°C;

[0044] Step 2. Process the green body through the cold pressing mold, and use the standard tooth mold to correct the forming teeth;

[0045] Step 3, carburizing, quenching, comprises the following steps,

[0046] Step 1) The blank is preheated, the preheating temperature is controlled at 360°C-380°C, firstly, the blank is degreased to remove surface impurities, secondly, the blank is pre-oxidized to ensure a uniform carburized layer, and finally the blank is It can slow down the heating speed, reduce the unevenness of heating temperature and stress at different positions of different blanks, and reduce the deformation of heat treatment;

[0047] Step 2) Heating and heat preservation. The continuous heating temperature is c

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PUM

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Abstract

The invention belongs to the technical field of gear forging, and particularly discloses an automotive transmission gear forging method. The method includes the following steps that 1, blanking is conducted, low-carbon steel is selected to heat a high-frequency furnace, and the heating temperature ranges 1100 DEG C to 1300 DEG C; 2, blank machining is conducted through a cold pressing die, and formed teeth are corrected through a standard tooth die; 3, carburizing and quenching are conducted; 4, saponification of phosphorus, gear machining and gear face carburizing are conducted, and the surface carburizing thickness ranges from 0.7 mm to 0.8 mm. A gear formed through the automotive transmission gear forging method has the following advantages that the mechanical performance is excellent, degassing is achieved effectively and carbon oxide is not removed by heating metal through vacuum hardening; the service life is prolonged by 2 times to 4 times; slow heating is conducted in a thermal radiation mode, uniformity is achieved, and the deformation and the degree of dispersion are small; vacuum heating is conducted, the surface is smooth, and quality is good; the manufacturing cost is low, and the production process is environment-friendly and free of pollution.

Description

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Claims

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Application Information

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Owner 苏州优金金属成型科技有限公司
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