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Helical bevel gear driving tooth threading machining process

A technology of spiral bevel gear and processing technology, applied in metal processing, metal processing equipment, metal material coating technology and other directions, can solve the problems of environmental pollution, low efficiency, poor appearance, etc., to reduce industrial pollution, reduce process flow, The effect of cleaning the workshop environment

Active Publication Date: 2010-01-20
ZHUZHOU GEAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned problems that the traditional processing technology of the screw bevel gear active tooth thread part of the automobile main reducer is prone to bumps, low precision, poor appearance, low efficiency, high cost and environmental pollution, and to provide a high-precision, High-efficiency, low-cost and pollution-free active gear threading process for spiral bevel gears

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Material selection: 20CrMnTi low-carbon alloy steel is selected as the material, and the outer diameter of the thread is φ36mm; with two positioning holes of φ5mm;

[0026] 2. Heat treatment

[0027] (1) carburizing and quenching,

[0028] The first step: carbon potential 1.2%, temperature 930°C, quenching for 650 minutes;

[0029] Step 2: Diffusion quenching for 90 to 120 minutes, the carbon potential is 0.7%, and the temperature is 910°C to 930°C;

[0030] The third step: keep warm for 45 minutes, the carbon potential is 0.7%, and the temperature is 840°C;

[0031] (2) Tempering:

[0032] Temperature 180°C, keep warm for 2 hours;

[0033] (3) Annealing of threaded parts:

[0034] The temperature is 600℃~900℃, and the surface hardness of the threaded part after annealing is 28HRC~43HRC;

[0035] 3. Processing

[0036] Fix the above workpiece on the lathe;

[0037] 4. Thread cutting

[0038] Dry cutting is used, the workpiece speed is 601 rpm, the linear spe...

Embodiment 2

[0041] 1. Material selection: The material is 20CrMnTi low-carbon alloy steel, and the outer diameter of the thread is φ36mm; it has two positioning grooves with a length of 10mm, a width of 5mm, and a depth of 8mm;

[0042] 2. Heat treatment

[0043] (1) carburizing and quenching,

[0044] The first step: carbon potential 1.2%, temperature 920°C, quenching for 650 minutes;

[0045] The second step: Diffusion quenching for 90-120 minutes, the carbon potential is 0.7%, and the temperature is 930°C;

[0046] The third step: keep warm for 45 minutes, the carbon potential is 0.7%, and the temperature is 830C;

[0047] (2) Tempering:

[0048] Temperature 180°C, keep warm for 2 hours;

[0049] (3) Annealing of threaded parts:

[0050] The temperature is 600℃~900℃, and the surface hardness of the threaded part after annealing is 28HRC~43HRC;

[0051] 3. Processing

[0052] Fix the above workpiece on the lathe;

[0053] 4. Thread cutting

[0054] Dry cutting is used, the work...

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Abstract

The invention relates to a processing technology for driving gear hard cutting threading of a spiral bevel gear in a main decelerator for processing an automobile, the processing technology is characterized in that heat treatment on Phi 10-Phi 100 mm low carbon alloy steel base materials-carburization quenching-tempering-heat insulation for 2 hours at the temperature of 170 to 180 DEG C-annealing at the thread part at the temperature of 600 to 900 DEG C and the surface hardness of 28 HRC-43 HRC-dry cutting of thread, the rotating speed of work pieces at 500 to 900 circles per minute, the cutting speed at the 50 to 80 meters per minute-detection for warehousing. The invention has the advantages that the processing precision is high, the efficiency is high, the cost is low, the technological process is reduced, by adopting the dry cutting process, the cutting oil is not required, and the invention is pollution-free.

Description

technical field [0001] The invention relates to a process for processing threads, in particular to a process for processing threads of active teeth of spiral bevel gears in automobile main reducers after carburizing and quenching. Background technique [0002] There are two traditional thread processing techniques for spiral bevel gear active teeth of automotive main reducers. One is to process the threads before the heat treatment of the workpiece, and then trim the threads after heat treatment; the other is to process the threads on the workpiece first, and grind them after heat treatment. Thread, using the traditional cutting method, must add cutting oil when cutting, so the waste oil will pollute the environment. The first process is complicated and inefficient, and the thread is formed without heat treatment. Due to the low hardness of the thread, it is easy to form bumps in the process of product circulation. The thread produced by this process has poor appearance qual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23P25/00C21D1/18C23C8/22C21D1/26B23G1/00
Inventor 谢耀东雷克干冯世杰唐建中张俊杰
Owner ZHUZHOU GEAR CO LTD
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