阅读说明：本技术 一种环保高效刹车片及其制备方法 (Environment-friendly efficient brake pad and preparation method thereof ) 是由 刘广书 于 2019-03-08 设计创作，主要内容包括：本发明公开了一种环保高效刹车片及其制备方法,刹车片包括不锈钢底板和摩擦块,制备摩擦块的原料包括：碳化硅、有机纤维、粘土、酚醛树脂、石墨纳米粉、三氧化二铝、硅酸锆、四氟乙烯、硫酸钡和钛酸钾；制备方法为：将制备摩擦块的原料称重,投入搅拌机搅拌得到制备摩擦块的原料；用液压机将混合原料压制成型得到摩擦块；利用热压机在高温高压环境下将摩擦块与不锈钢底板压制在一起得到刹车片；对刹车片进行热处理；磨削刹车片使其达到设定厚度；喷涂。本发明提供的刹车片具有良好的耐磨性能,高温制动无显著热衰退,且在制动摩擦中不落灰。(The invention discloses an environment-friendly efficient brake pad and a preparation method thereof, the brake pad comprises a stainless steel bottom plate and a friction block, and the raw materials for preparing the friction block comprise: silicon carbide, organic fiber, clay, phenolic resin, graphite nano powder, aluminum oxide, zirconium silicate, tetrafluoroethylene, barium sulfate and potassium titanate; the preparation method comprises the following steps: weighing the raw materials for preparing the friction block, and putting the raw materials into a stirrer to stir to obtain the raw materials for preparing the friction block; pressing and molding the mixed raw materials by using a hydraulic machine to obtain a friction block; pressing the friction block and the stainless steel bottom plate together by using a hot press in a high-temperature and high-pressure environment to obtain a brake pad; carrying out heat treatment on the brake pad; grinding the brake pad to a set thickness; and (4) spraying. The brake block provided by the invention has good wear resistance, does not have obvious heat fading during high-temperature braking, and does not drop ash during braking friction.)

1. The brake pad is characterized by comprising a stainless steel bottom plate and a friction block, wherein the friction block is prepared from the following raw materials: silicon carbide, organic fiber, clay, phenolic resin, graphite nano powder, aluminum oxide, zirconium silicate, tetrafluoroethylene, barium sulfate and potassium titanate.

2. The brake pad of claim 1, wherein the raw materials in parts by weight are respectively: 7-12 parts of silicon carbide, 1-5 parts of organic fiber, 1-5 parts of clay, 15-25 parts of phenolic resin, 3-6 parts of graphite nano powder, 10-15 parts of aluminum oxide, 10-20 parts of zirconium silicate, 15-25 parts of tetrafluoroethylene, 5-10 parts of barium sulfate and 30-40 parts of potassium titanate.

3. The brake pad of claim 1, wherein the raw materials in parts by weight are respectively: 8-10 parts of silicon carbide, 3 parts of organic fiber, 2 parts of clay, 18-20 parts of phenolic resin, 4 parts of graphite nano powder, 11-13 parts of aluminum oxide, 15-17 parts of zirconium silicate, 19-22 parts of tetrafluoroethylene, 7-9 parts of barium sulfate and 34-36 parts of potassium titanate.

4. A method for manufacturing a brake pad according to any one of claims 1 to 3, comprising the steps of:

(1) mixing materials, namely putting the weighed raw materials into a stirrer, and stirring at the speed of 1500-2000 rpm for 10-20 minutes to obtain mixed raw materials for preparing the friction block;

(2) and (3) pressing and forming: pressing the mixed raw material obtained in the step (1) by using a hydraulic machine to obtain a friction block, wherein the pressing pressure is 5-15 MPa, the temperature is 25-50 ℃, and the pressure maintaining time is 250-500 seconds;

(3) hot pressing treatment: putting the friction block obtained in the step (2) and a stainless steel bottom plate into a hot press for hot pressing, pressing the friction block and the stainless steel bottom plate together in a high-temperature and high-pressure environment to form a brake pad, wherein the hot pressing temperature is 100-150 ℃, the pressure is 20-30 MPa, and the pressure maintaining time is 10-20 minutes;

(4) and (3) heat treatment: carrying out heat treatment on the brake pad obtained in the step (3) in a heat treatment furnace, wherein the heat treatment temperature is 300-400 ℃, and the heat treatment time is 12-15 hours;

(5) grinding: grinding the brake pad obtained in the step (4) by using a grinding machine to reach a set thickness;

(6) spraying: and (5) spraying the brake pad obtained in the step (5) by using a spraying machine.

5. A method for manufacturing a brake pad according to claim 4, comprising the steps of:

(1) mixing materials, namely putting the weighed raw materials into a stirrer, and stirring for 12-15 minutes at the speed of 1600-1800 rpm to obtain mixed raw materials for preparing the friction block;

(2) and (3) pressing and forming: pressing the mixed raw material obtained in the step (1) by using a hydraulic machine to obtain a friction block, wherein the pressing pressure is 8-12 MPa, the temperature is 30-40 ℃, and the pressure maintaining time is 300-400 seconds;

(3) hot pressing treatment: putting the friction block obtained in the step (2) and a stainless steel bottom plate into a hot press for hot pressing, pressing the friction block and the stainless steel bottom plate together under a high-temperature and high-pressure environment to form a brake pad, wherein the hot pressing temperature is 120-140 ℃, the pressure is 30MPa, and the pressure maintaining time is 20 minutes;

(4) and (3) heat treatment: carrying out heat treatment on the brake pad obtained in the step (3) in a heat treatment furnace, wherein the heat treatment temperature is 320-380 ℃, and the heat treatment time is 15 hours;

(5) grinding: grinding the brake pad obtained in the step (4) by using a grinding machine to reach a set thickness;

(6) spraying: and (5) spraying the brake pad obtained in the step (5) by using a spraying machine.

Technical Field

The invention discloses a high-efficiency environment-friendly brake pad and a preparation method thereof, and relates to the technical field of automobile composite friction materials and brake pad manufacturing.

Background

The brake pad is an important functional part of various vehicle brake systems, generally comprises a stainless steel bottom plate and a friction block, and the kinetic energy is converted into heat energy through a friction material of the friction block to realize braking. The performance of the friction material directly affects the safety, reliability and comfort of operation of the braking system. At present, a friction block of an automobile brake pad is mainly made of asbestos-free composite materials, semi-metal materials or ceramic materials, but dust powder is generally easily generated in the braking friction process of the materials, the dust powder can cause air pollution if dispersed into air, and if the dust powder is adsorbed on a wheel hub, the dust powder is difficult to clean and corrodes the wheel hub.

Aiming at the defects of the prior art, the invention provides a preparation method of an efficient and environment-friendly brake pad, and mainly aims to enable the brake pad to have good wear resistance and high-temperature braking performance, reduce the ash falling phenomenon of the brake pad in the braking process and reduce the corrosion of a wheel hub and air pollution.

Disclosure of Invention

In order to solve the problems, the invention discloses a high-efficiency environment-friendly brake pad on one hand, which comprises a stainless steel bottom plate and a friction block, wherein the friction block is prepared from the following raw materials: silicon carbide, organic fiber, clay, phenolic resin, graphite nano powder, aluminum oxide, zirconium silicate, tetrafluoroethylene, barium sulfate and potassium titanate.

In a preferred embodiment, the friction block is prepared from the following raw materials in parts by weight: 7-12 parts of silicon carbide, 1-5 parts of organic fiber, 1-5 parts of clay, 15-25 parts of phenolic resin, 3-6 parts of graphite nano powder, 10-15 parts of aluminum oxide, 10-20 parts of zirconium silicate, 15-25 parts of tetrafluoroethylene, 5-10 parts of barium sulfate and 30-40 parts of potassium titanate.

In another preferred embodiment, the raw materials for preparing the friction block in parts by weight are respectively: 8-10 parts of silicon carbide, 3 parts of organic fiber, 2 parts of clay, 18-20 parts of phenolic resin, 4 parts of graphite nano powder, 11-13 parts of aluminum oxide, 15-17 parts of zirconium silicate, 19-22 parts of tetrafluoroethylene, 7-9 parts of barium sulfate and 34-36 parts of potassium titanate.

In another preferred embodiment, the raw materials for preparing the friction block in parts by weight are respectively: 10 parts of silicon carbide, 3 parts of organic fiber, 2 parts of clay, 20 parts of phenolic resin, 4 parts of graphite nano powder, 13 parts of aluminum oxide, 17 parts of zirconium silicate, 22 parts of tetrafluoroethylene, 9 parts of barium sulfate and 36 parts of potassium titanate.

The invention also provides a method for preparing the brake pad, which comprises the following steps:

(1) mixing materials, namely putting the weighed raw materials into a stirrer, and stirring at the speed of 1500-2000 rpm for 10-20 minutes to obtain mixed raw materials for preparing the friction block;

(2) and (3) pressing and forming: pressing the mixed raw material obtained in the step (1) by using a hydraulic machine to obtain a friction block, wherein the pressing pressure is 5-15 MPa, the temperature is 25-50 ℃, and the pressure maintaining time is 250-500 seconds;

(3) hot pressing treatment: putting the friction block obtained in the step (2) and a stainless steel bottom plate into a hot press for hot pressing, pressing the friction block and the stainless steel bottom plate together in a high-temperature and high-pressure environment to form a brake pad, wherein the hot pressing temperature is 100-150 ℃, the pressure is 20-30 MPa, and the pressure maintaining time is 10-20 minutes;

(4) and (3) heat treatment: carrying out heat treatment on the brake pad obtained in the step (3) in a heat treatment furnace, wherein the heat treatment temperature is 300-400 ℃, and the heat treatment time is 12-15 hours;

(5) grinding: grinding the brake pad obtained in the step (4) by using a grinding machine to reach a set thickness;

(6) spraying: and (5) spraying the brake pad obtained in the step (5) by using a spraying machine.

In a preferred embodiment, the method for preparing the brake pad comprises the following steps:

(1) mixing materials, namely putting the weighed raw materials into a stirrer, and stirring for 12-15 minutes at the speed of 1600-1800 rpm to obtain mixed raw materials for preparing the friction block;

(2) and (3) pressing and forming: pressing the mixed raw material obtained in the step (1) by using a hydraulic machine to obtain a friction block, wherein the pressing pressure is 8-12 MPa, the temperature is 30-40 ℃, and the pressure maintaining time is 300-400 seconds;

(3) hot pressing treatment: putting the friction block obtained in the step (2) and a stainless steel bottom plate into a hot press for hot pressing, pressing the friction block and the stainless steel bottom plate together under a high-temperature and high-pressure environment to form a brake pad, wherein the hot pressing temperature is 120-140 ℃, the pressure is 30MPa, and the pressure maintaining time is 20 minutes;

(4) and (3) heat treatment: carrying out heat treatment on the brake pad obtained in the step (3) in a heat treatment furnace, wherein the heat treatment temperature is 320-380 ℃, and the heat treatment time is 15 hours;

(5) grinding: grinding the brake pad obtained in the step (4) by using a grinding machine to reach a set thickness;

(6) spraying: and (5) spraying the brake pad obtained in the step (5) by using a spraying machine.

In another preferred embodiment, the method for preparing the brake pad comprises the following steps:

(1) mixing, namely putting the weighed raw materials into a stirrer, and stirring at 1800 rpm for 15 minutes to obtain mixed raw materials for preparing the friction block;

(2) and (3) pressing and forming: pressing the mixed raw material obtained in the step (1) by using a hydraulic machine to obtain a friction block, wherein the pressing pressure is 12MPa, the temperature is 40 ℃, and the pressure maintaining time is 400 seconds;

(3) hot pressing treatment: putting the friction block obtained in the step (2) and a stainless steel bottom plate into a hot press for hot pressing, pressing the friction block and the stainless steel bottom plate together under a high-temperature and high-pressure environment to form a brake pad, wherein the hot pressing temperature is 140 ℃, the pressure is 30MPa, and the pressure maintaining time is 20 minutes;

(4) and (3) heat treatment: carrying out heat treatment on the brake pad obtained in the step (3) in a heat treatment furnace, wherein the heat treatment temperature is 380 ℃, and the heat treatment time is 15 hours;

(5) grinding: grinding the brake pad obtained in the step (4) by using a grinding machine to reach a set thickness;

(6) spraying: and (5) spraying the brake pad obtained in the step (5) by using a spraying machine.

The invention has the beneficial effects that: the brake block has excellent wear resistance and high-temperature braking performance, and the problem of dust falling of the traditional brake block is well solved.

Detailed Description

The present invention is further illustrated by the following examples, but the scope of the present invention is not limited to the following examples.