Friction plate for light mechanical brake disc and preparation method thereof

Abstract

The invention relates to a friction plate and a preparation method thereof, in particular to a friction plate for a light mechanical brake disc and a preparation method thereof. The friction plate comprises a friction plate body which is formed by aftertreatment cylindrical fiber three-dimensional knitted fabrics and modified boron phenolic resin after infiltration, and aftertreatment includes drying, die pressing, heat treatment and grinding. In the project, reinforcing fibers (aramid fibers and / or sisal fibers) are pre-made into a cylindrical prefabricated body of a three-dimensional structure, the prefabricated body belongs to a highly-integrated continuous fiber bundle woven assembly with the multi-axial orientation, the isotropic adaptability is good, the problem of delamination between traditional process adhesive tapes is solved, the excellent impact toughness and fatigue resistance are achieved, and the defects of unstable friction performance, uneven product compressive strength and the like in an original process are overcome; and meanwhile, based on the once-molding three-dimensional processing technology, the thickness variable range of the prefabricated body is large,the molding performance is good, and the production efficiency of the friction plate is increased by more than 40%.

Description

technical field [0001] The invention relates to a friction plate and a preparation method thereof, in particular to a friction plate for a light mechanical brake disc and a preparation method thereof. Background technique [0002] With the rapid development of our country, the market demand for various light machinery and equipment (including various lawn mowers, portable machinery and electric hoist cranes) is also increasing significantly, with an annual growth rate of more than 30%. Therefore, it is necessary to The growth rate of the friction plate is also more than 30%, which also causes a very tight market supply situation. At the same time, new requirements are put forward for the quality of the existing friction plate, that is, the friction plate should have stable friction and better durability. At the same time, according to the requirements of environmental protection, the components of the friction plate are not allowed to contain asbestos, trivalent chromium, le...

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Problems solved by technology

[0004] The production process of the traditional process is long, especially the radial direction is composed of multi-layer rubber strips. During hot pressing, pressure is applied along the axial direction, and the adhesive strips are extruded and solidified by extrusion, and the interlayer bonding strength is poor. As the mechanical load increases and the speed of the motor increases, the friction plate is prone to defects such as delamination during the braking process, which seriously affects the service life of the friction plate

Moreover, metal copper will release a small amount of metal dust during friction braking and accumulate in the environment to cause harm

[0005] In addition, there is another kind of existing technology: the continuous copper wire along the circumference ensures the mechanical strength of the friction material during molding and use, but it is difficult to meet the requirements of gradually reducing the use of metal copper

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