Phenolic resin based friction material for ultrasonic motors and preparation method thereof

A technology of phenolic resin and friction material, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of shortening the service life of ultrasonic motors, low friction performance of friction materials, and unstable friction performance, so as to increase service time and Reliability, improved overload resistance, and improved wear resistance

Inactive Publication Date: 2017-04-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the main problem in the use of the linear ultrasonic motor is that the friction performance of the friction material is not high, which reduces the service life of the ultrasonic motor; the main problem of the friction material used in the rotary ultrasonic motor is that the friction performance is unstable and the service life Short, narrow operating temperature range, weak overload resistance, etc.
Up to now, there is no patent report about this kind of boron phenolic resin composite material as the friction material of ultrasonic motor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh each component according to the mass percentage of boron phenolic resin powder 55%, aramid fiber powder 20%, aluminum silicate powder 15%, copper powder 5% and graphite 5%, wherein boron phenolic resin particle diameter is 50-100 μ m, The particle size of aramid fiber powder is 50-75 μm, the particle size of aluminum silicate powder is 60-80 μm, the particle size of copper powder is 20-50 μm, and the particle size of graphite is 50-70 μm.

[0029] The friction material is prepared by using the above proportioned components, and the specific preparation steps are as follows:

[0030] (1) First disperse boron phenolic resin powder, aramid fiber powder, aluminum silicate, graphite and copper powder in proportion to absolute ethanol and mechanically stir in an ultrasonic water bath for 2 hours to fully mix the components; then dry stand-by;

[0031] (2) Pour the uniformly mixed material into the mold for hot pressing molding, the pressure is 40MPa, the sintering temp...

Embodiment 2

[0034] Weigh each component according to the mass percentage of boron phenolic resin 60%, aramid fiber 15%, aluminum silicate 20%, copper powder 2% and graphite 3%, wherein the particle size of boron phenolic resin is 50-100 μm, aramid fiber The particle size of the powder is 50-75 μm, the particle size of the aluminum silicate powder is 60-80 μm, the particle size of the copper powder is 20-50 μm, and the particle size of the graphite is 50-70 μm.

[0035] The friction material is prepared by using the above proportioned components, and the specific preparation steps are as follows:

[0036] (1) First, disperse boron phenolic resin powder, aramid fiber powder, aluminum silicate, graphite and copper powder in proportion to absolute ethanol and mechanically stir in an ultrasonic water bath for 1.5 hours, and mix all components well; then bake dry for use;

[0037] (2) Pour the uniformly mixed material into the mold for hot pressing, the pressure is 35MPa, the sintering tempera...

Embodiment 3

[0040] Weigh each component according to the mass percentage of boron phenolic resin 65%, aramid fiber 15%, aluminum silicate 10%, and graphite 10%, wherein the particle size of boron phenolic resin is 50-100 μm, and the particle size of aramid fiber powder is 50 -75μm, the particle size of aluminum silicate powder is 60-80μm, the particle size of copper powder is 20-50μm, and the particle size of graphite is 50-70μm.

[0041] The friction material is prepared by using the above proportioned components, and the specific preparation steps are as follows:

[0042] (1) Disperse boron phenolic resin powder, aramid fiber powder, aluminum silicate and graphite in proportion to absolute ethanol and mechanically stir in an ultrasonic water bath for 1.5 hours to fully mix the components; then dry and set aside ;

[0043] (2) Pour the uniformly mixed material into the mold for hot pressing, the pressure is 35MPa, the sintering temperature is 190°C, and it is naturally cooled after sint...

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Abstract

The invention discloses a phenolic resin based friction material for ultrasonic motors. The phenolic resin based friction material is prepared from the following components by mass percentage: 55-70% of phenolic resin; 10-20% of aramid fiber; 10-20% of aluminum silicate; 0-10% of copper powder; and 0-10% of graphite. The invention also discloses a preparation method of the material. The method includes: subjecting uniformly mixed materials to hot press molding, then slicing the hot press molded material and applying the obtained material to ultrasonic motors. The friction material prepared by the method has good comprehensive performance, can meet the use requirements of ultrasonic motors under the harsh environments of a wide temperature range, ultralong service life requirement, and large load, etc., and broadens the application requirements of ultrasonic motors in aerospace, precise instruments and high-end equipment. Also the method is simple and reliable, and the prepared material has stable properties, therefore the phenolic resin based friction material is an ideal friction material for ultrasonic motors, and the method is a reliable preparation method.

Description

technical field [0001] The invention belongs to the field of motor material preparation, and relates to a phenolic resin composite material and a preparation method, in particular to a phenolic resin-based friction material for an ultrasonic motor and a preparation method. Background technique [0002] Ultrasonic motor is a new type of micro-motor developed rapidly in the 1980s and has special applications. Since the ultrasonic motor transmits power through the friction interface, the friction characteristics of the interface are very important to the overall performance of the ultrasonic motor. At present, the friction driving mode of the ultrasonic motor is dry friction between the stator and the rotor, and the wear of the material is inevitable. Due to the wear, the service life of the ultrasonic motor is shortened and the pre-pressure changes, which leads to the instability of the output speed of the ultrasonic motor. Ultrasonic motors can be divided into linear ultrason...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
CPCC09K3/14
Inventor 赵盖宋敬伏丁庆军裘进浩
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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