Preparation method of brake friction plate processed by flat plate mold

Abstract

The invention provides a preparation method of a brake friction plate processed by a flat plate mold, which comprises the following steps: S1, preheating and pressing a flat plate: horizontally paving a prepared friction plate raw material in the flat plate mold, and closing and hot-pressing an upper mold and a lower mold of the flat plate mold to form a flat plate blank of the friction plate; S2, hot-pressing bending: directly placing the flat plate blank of the friction plate prepared in the step S1 into a bending mold while being hot to be pressed into a blank shape of a long bent plate friction plate, and the blank is an arc-shaped friction plate blank; and S3, batch bending, hot-pressing, curing and forming: placing multiple arc-shaped friction plate blanks into a row mold at the same time to be hot-pressed, cured and formed into the long bent plate friction plate. The invention provides the novel preparation method of the brake friction plate processed by the flat plate mold, which has the advantages of uniform product thickness, intact corners, high forming precision and high qualification rate, particularly high qualification rate of long bent plates, and is different from a cylinder mold and row mold processing mode.

Description

technical field [0001] The invention relates to the technical field of processing and preparation of brake friction linings, in particular to a method for preparing brake friction linings processed by a flat mold. Background technique [0002] Friction materials are a class of materials used in various vehicles (such as automobiles, trains, motorcycles, airplanes, ships, bicycles, etc.) and various power machinery (such as oil rigs, tractors, elevators, excavators, tanks, etc. Friction is used to complete the braking and transmission functions. It mainly includes brake linings (commonly known as brake pads) for braking and clutch surfaces (commonly known as clutch plates) for transmission. [0003] At present, the brake friction linings of domestic products are processed and formed by two methods: dry processing and wet processing, and the mainstream processing method is dry processing. In the existing dry processing method, multi-layer cylinder molds are often used for pro...

AI Technical Summary

Problems solved by technology

In the existing dry processing method, multi-layer cylinder molds are often used for processing and forming. The friction material is vertically loaded in the cylinder mold. After pressing and forming, the brake friction pads with radians are directly formed. However, this processing method has the following advantages: Disadvantages: 1. After the friction material is vertically loaded in the cylindrical mold, because the mold itself is arc-shaped, it is not easy to spread the material evenly, and the transmission of the pressing force is reduced during pressing, and the pressed friction plate is likely to be loose in the middle and too tight on both sides The thickness of the brake friction plate is uneven; 2. When the cylinder mold is used for pressing, slag inclusions often occur at the corners due to the uneven laying of friction materials and uneven pressing force; 3. When the cylinder mold is used for pressing , the precision of the friction plate pressing and forming is not high, and it is often necessary to press more product sizes than the target size friction plate, and then use the subsequent cutting process to cut and finely process materials of more sizes

Or it can be processed in the form of multiple mouldings, but when the mouldings are used to process long-curved brake friction pads, cracks and quality problems will occur due to the large inner arc R of long-curved products, which is not easy to lay and fix.

Images