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Method for manufacturing driving gear of motorcycle clutch

The technology of a driving gear and a manufacturing method, which is applied in the field of manufacturing the driving gear of motorcycle clutches, can solve the problems that the strength and fatigue performance cannot meet the high-speed rotation of the driving gear, and achieve the effects of high strength, eliminating cracks, and simple manufacturing process

Inactive Publication Date: 2011-04-06
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The density of traditional powder metallurgy parts can only reach 7.0g / cm 3 Therefore, in terms of strength and fatigue properties, it cannot meet the requirements of high-speed rotation of the driving gear. Continuously increasing the density of the product has become the research direction of powder metallurgy.

Method used

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  • Method for manufacturing driving gear of motorcycle clutch
  • Method for manufacturing driving gear of motorcycle clutch
  • Method for manufacturing driving gear of motorcycle clutch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ① Prepare the raw material, that is, the mixed powder of iron alloy and carbon. The proportion is: iron alloy (1.5% chromium, 0.2% molybdenum, 98.3% iron) is 99.45%; carbon is 0.25%, and then add 0.3% Organosilane wax lubricants;

[0033] ② Press the above mixed powder on the press to make the density greater than 7.45g / cm 3 Active gear parts; pressing can be formed by warm pressing or mold heating.

[0034] ③ Sintering, the driving gear parts are sintered at a temperature of 1280° C., and the sintering time is 30 minutes. The sintering is carried out in a vacuum sintering furnace or in a sintering furnace based on nitrogen and the proportion of hydrogen is 10 vol %;

[0035] ④Heat treatment, according to the chemical composition requirements of the sintered parts, determine the heat treatment process, the heat treatment carbon potential is 0.8%, the quenching temperature is 830 ° C, heat preservation for 30 minutes, the tempering temperature is 200 ° C, heat preservat...

Embodiment 2

[0039] ① Prepare the raw materials, that is, the mixed powder of iron, chromium, carbon and nickel. The ratio is: iron alloy (1.5% chromium, 0.2% molybdenum, 98.3% iron) is 97.95%, carbon is 0.25%, nickel is 1.5% %, then add a content of 0.3% organosilane wax lubricant;

[0040] ② Press the above mixed powder on the press to make the density greater than 7.4g / cm 3 Active gear parts; pressing can be formed by warm pressing or mold heating.

[0041] ③Sintering, the driving gear parts are sintered at a temperature of 1300°C, the sintering time is 30 minutes, and the sintering is carried out in a vacuum sintering furnace or in a sintering furnace based on nitrogen and the proportion of hydrogen is 75vol%;

[0042] ④Heat treatment: Determine the heat treatment process according to the chemical composition requirements of the sintered parts. The heat treatment quenching temperature is 900°C, the heat treatment carbon potential is 0.8%, the heat preservation is 35 minutes, the tempe...

Embodiment 3

[0045] ① Prepare the raw materials, that is, the mixed powder of iron, chromium, molybdenum, nickel, carbon and copper. The ratio is: 85.1% iron: 0.8% carbon, 5.0% chromium, 1.5% molybdenum, and 4% nickel %, the copper content is 3%, and then adding a content of 0.6% ethylene bis-stearamide (Ethylene bis-stearamide, EBS) type lubricant;

[0046] ②Compress the above mixed powder on a press to form a drive gear part with a density greater than 7.3g / cm3; the pressing can be formed by warm pressing or female mold heating.

[0047] ③ Sintering, the driving gear part is sintered at a temperature of 1350° C., and the sintering time is 10 minutes. The sintering is carried out in a vacuum sintering furnace or in a sintering furnace based on nitrogen and the proportion of hydrogen is 15vol%;

[0048] ④Heat treatment: Determine the heat treatment process according to the chemical composition requirements of the sintered parts. The heat treatment quenching temperature is 900°C, hold for 4...

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Abstract

The invention relates to a method for manufacturing a driving gear of a motorcycle clutch, which is characterized by sequentially comprising the following steps of: (1) preparing a raw material, namely mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, and adding a required amount of lubricant; (2) pressing the mixed powder into a driving gear part with the density of more than 7.3g / cm<3> on a pressing machine with the pressure of more than 600MPa; (3) sintering, namely sintering the driving gear part in a vacuum sintering furnace or a continuous sintering furnace at the temperature of between 1,100 and 1,350 DEG C for 10 to 120 minutes; and (4) performing heat treatment, namely determining a heat treatment process according to the chemical component requirement of the sintered part, quenching at the temperature of between 800 and 1,000 DEG C, preserving heat for 30 to 45 minutes, tempering at the temperature of between 150 and 400 DEG C, and preserving heat for 110 to 130 minutes. The method has the advantages that: the manufacturing process is simple; the driving gear has high accuracy, strength and surface smoothness; and the problem that a die is easy to crack because the forging process is performed at a high temperature is effectively solved, so that production cost is reduced, and production efficiency is improved.

Description

technical field [0001] The invention relates to a manufacturing method of a motorcycle clutch driving gear. Background technique [0002] As an important part of the transmission system, gears are traditionally formed by machining. The current main processing methods of the mechanically processed clutch driving gear include the direct forming of steel by mechanical processing and the forming by cold extrusion. The mechanical processing method has a long process, a low raw material utilization rate of about 40-60%, high product cost, poor consistency, and low production efficiency, which is difficult to meet the performance requirements of motorcycles for key parts. [0003] And adopt the method of cold extrusion to form, generally need warm forge billet, then cold extrusion forming. Forged parts have high dimensional accuracy, good dimensional consistency, smooth surface, high tooth profile precision of internal gear, clear gear outline, less machining allowance on outer s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/08B22F3/16B22F3/24C21D9/32C21D1/18
Inventor 曹红斌包崇玺张静锋
Owner NBTM NEW MATERIALS GRP
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