Sintering method for powder metallurgy brake pad

Abstract

The invention provides a sintering method for a powder metallurgy brake pad. The sintering method comprises the steps that at least one high-temperature-resistant tray is provided, at least one cavityis formed in each high-temperature-resistant tray, a bottom face and an avoiding structure are arranged in each cavity, and the avoiding structures contain protruding structures and cylindrical coreson avoiding back plates; the high-temperature-resistant trays are installed in a sintering furnace in a reducing gas atmosphere; the brake pad obtained after cold press molding is placed in the cavities; at least one pressing plate is provided; the pressing plates are placed in the cavities above friction blocks; pressure acts on the pressing plates so that the pressing plates can press the friction blocks, and the pressure is maintained within a set temperature range; and the high-temperature-resistant trays and the brake pad are slowly cooled together, and then the brake pad is taken out ofthe high-temperature-resistant trays. According to the sintering method for the powder metallurgy brake pad, the product performance and quality are effectively improved, and the product consistencyand reliability are guaranteed.

Description

technical field [0001] The invention relates to the field of processing methods for brake parts, in particular to a powder metallurgy brake pad sintering method. Background technique [0002] With the increase of the speed of the train, higher requirements are put forward for the braking of the train. Brake pads for high-speed motor vehicles today have adopted a combination of multiple powder metallurgy friction blocks, so that the brake pads can reduce overheating fatigue under high-speed and high-pressure braking conditions, improve the heat dissipation capacity of the brake pads, and overcome the friction performance of the brake pads. . [0003] In the traditional processing technology of the existing brake pads, the cold-pressed brake pads are directly placed in the sintering furnace for sintering. During the sintering process, the friction blocks on the brake pads are completely exposed in the sintering furnace. The brake pads sintered according to this method, The d...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a method for sintering powder metallurgy brake pads, which is used to solve the problem that the existing powder metallurgy brake pads have large density and size errors after sintering, thereby affecting the braking performance.

Images