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Automobile steel-made synchronizer ring gear carbon fiber friction material and use

A synchronizer gear ring and friction material technology, which is applied in the field of automobile friction materials, can solve the problems of insignificant cost reduction, high molybdenum price, and high production cost.

Inactive Publication Date: 2005-02-16
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the past, the synchronizer rings were all made of alloy copper, and the production cost was expensive. In recent years, some manufacturers used steel synchronizer rings instead of alloy copper synchronizer rings, but the friction performance of steel was not as good as that of alloy copper. The friction performance is good, so the method of spraying molybdenum on the joint cone surface of the synchronizer ring is used to improve its friction performance, but because the price of molybdenum is still high, this method does not have much significance for reducing costs

Method used

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  • Automobile steel-made synchronizer ring gear carbon fiber friction material and use
  • Automobile steel-made synchronizer ring gear carbon fiber friction material and use

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Embodiment 1～3

[0042] Preparation of carbon fiber friction material for automobile steel synchronizer gear ring: Weigh the raw materials according to the raw material ratio in Table 1, mix them evenly with a mixer, and then hot press them into pieces with a hot press and a hot pressing die. The hot pressing condition is pressure 15MPa, temperature 160°C, tablet pressing time is determined according to the thickness of the friction plate, the pressing time is 1.5 to 2 minutes per 1mm thickness, the operating process is 15MPa pressure at 160°C for 40 seconds, 0MPa exhaust for 20 seconds, and then Press at 15MPa for 40 seconds, exhaust at 0MPa for 20 seconds, press at 15MPa for 4 minutes, and release the mold at 0MPa to obtain a sample of the pressed friction sheet; heat and cure the pressed sheet. The curing process is: from room temperature to 100°C for 1 hour, and then Raise the temperature to 120°C for 1 hour, then raise the temperature to 140°C for 1 hour, heat at 140°C for 2 hours, then ra...

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Abstract

This invention provides a kind of friction material on steel synchronizer of automobiles and its method of application. This friction material chooses acrylonitrile carbon fiber as the reinforcing material and the cashew nut shell oil and melamine phenol-formaldehyde resin modified as the bond and is composed of many frictional-properties-adjusting agents, such as dilatant iron dust, brass powder, synthetic graphite powder, zinc stearate, precipitated barium sulfate and molybdenum disulfide. This kind of friction material is featured by stable friction system, low wear rate and good temperature resistance. Between 100deg.C and 250deg.C, the coefficient of wear is between 0.25 and 0.38 and the wear rate is between 0.04cm3 / N.m and 0.47X10 to the power -7 cm3 / N.m. Compared with the denticulate ring technics of steel synchronizer, it is more simple, has a lower abrasion to the fittings, improves the frictional properties of the denticulate ring of the synchronizer and reduces the production cost.

Description

technical field [0001] The invention relates to a carbon fiber friction material for a gear ring of an automobile synchronizer and a use method thereof, belonging to the technical field of automobile friction materials. Background technique [0002] Carbon fiber friction material has excellent friction performance, strong impact resistance, shear strength, high temperature resistance and corrosion resistance. It has been widely used in the automobile manufacturing industry in developed countries such as the United States and Japan. It is a good substitute for asbestos automobile friction materials. [0003] In the past, the synchronizer rings were all made of alloy copper, and the production cost was expensive. In recent years, some manufacturers used steel synchronizer rings instead of alloy copper synchronizer rings, but the friction performance of steel was not as good as that of alloy copper. The friction performance is good, so the molybdenum spraying method is used o...

Claims

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Application Information

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IPC IPC(8): C08J5/14
Inventor 俞忠新涂骏鸣
Owner WUHAN UNIV OF TECH
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