Brake pad and preparation method thereof

Abstract

The invention relates to a brake pad, which comprises a metal framework and a friction material bonded on the metal framework, wherein the friction material comprises 8 to 12 parts of phenolic resin, 20 to 30 parts of potassium titanate whisker, 3 to 7 parts of cellulose, 5 to 9 parts of friction powder, 10 to 15 parts of mineral fibers, 2 to 5 parts of aramid fibers, 3 to 8 parts of steel wool fibers and 25 to 35 parts of barium sulfate. The preparation method comprises the steps of material preparation, material mixing, hot-forming, heat treatment, grinding and spraying. The phenolic resin plays a bonding role; the potassium titanate whisker and the cellulose reinforce a basal body and stabilize a friction factor and have a high friction performance; the mineral fibers and the friction powder interact to improve and stabilize the friction factor and have high heatfading stability; the aramid fibers and the steel wool fibers can increase the strength of products and improve the heat conductivity of the products; and the barium sulfate improves heat performance and wear resistance. The brake pad has the advantages of small metal material content, medium hardness, high water resistance, small damages to coupling elements in braking and long service life.

Description

technical field The invention relates to a brake pad, in particular to a brake pad suitable for cars and a preparation method thereof, belonging to the technical field of automobile friction materials. Background technique The basic quality requirements for brake pads used in car brakes are: wear resistance, high friction coefficient, and excellent heat insulation performance. According to different manufacturing materials, brake pads mainly include: 1. Asbestos type: Asbestos fibers have high strength and high temperature resistance characteristics, so they can meet the requirements of brake pads, clutch discs and liners. This kind of fiber has strong tensile strength, can even match with high-grade steel, and can withstand high temperature of 316 ℃. More importantly, asbestos is relatively cheap and widely used. However, asbestos materials have been confirmed by the medical profession to be carcinogens and are now banned. 2. Semi-metal type: "Semi-metal" hybrid brake pa...

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Problems solved by technology

4. At present, the manufacturing process of car brake pads is mainly based on dry mixing, and its molding process is mainly produced according to the two-step plate mold, that is, two steps of cold pressing and high temperature vulcanization. The disadvantages are: low yield of brake pads, long production cycle, low production efficiency, unstable product quality, low degree of mechanization, and large energy consumption

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