Wet-type copper based powder metallurgy friction wafer and manufacturing method

Abstract

The invention provides a wet copper basic powder metallurgy friction disc and a manufacture method. The friction disc mainly consists of a middle steel core plate and at least a side upper friction layer; at least one surface of the steel core plate is combined with a rubber film layer which is composite with a friction layer; the manufacture method at least comprises friction layer material distributing, mixed material, pressing-typed, burning, assembly with the steel core plate, and oil trough processing. The invention is characterized in that no pressure burning in a continuous burning furnace is adopted for burning; the friction layer after burning is dipped in rubber in a vacuum rubber dipping trough in normal temperature and is dried and assembled with the steel core plate; before the assembly, the surface of the steel core plate is coated; after assembly, the pressurization and solidification are carried out on a slab vulcanizing machine; the invention has the advantages of high efficiency of processing technique, low cost, increasing the hardness and strength, high size precision, etc.

Description

technical field [0001] The invention relates to a transmission friction plate and a manufacturing method, in particular to a friction plate and a manufacturing method for a transmission clutch made of copper-based powder metallurgy. Background technique [0002] The friction plate is one of the most important parts in various mechanical equipment. They use friction to work. To work reliably, the friction plate must have a sufficiently high and stable friction coefficient, high wear resistance, heat resistance, and high mechanical strength. , will not bite to death with the dual piece. The friction plate can be divided into metal, fiber reinforced resin base, such as asbestos, semi-metal, non-asbestos, paper base, carbon base, or powder metallurgy friction material according to the material. Powder metallurgy friction materials are widely used due to their high heat resistance, friction coefficient and wear resistance under various working conditions. The application range ...

AI Technical Summary

Problems solved by technology

Although the above-mentioned pressing and firing process makes the friction layer and the steel core plate have a higher bonding strength, there are still many disadvantages, such as the hardness and strength of the steel core plate are reduced after sintering and annealing, and the pressure transmission backing plate must be used to increase energy consumption during pressure sintering. The product is prone to pressure deviation, and the low melting point components in the friction layer are easily squeezed out, commonly known as alloy tumors, which reduces the friction performance of the friction plate and affects the appearance quality of the product. The cycle is longer and the cost is higher.

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