A lightweight, high-strength, high-temperature-resistant brake component back plate material and a preparation method thereof

Abstract

The invention relates to a light-weight, high-strength, and high-temperature-resistant brake component back plate material and a preparation method thereof. The light-weight, high-strength, and high-temperature-resistant brake component back plate material is composed of a heat-insulating layer, a fiber-reinforced back plate, and a positioning crack-stopping pin. The fiber-reinforced back plate is reinforced by alternately arranging glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface layer by layer, and perpendicular to the wear surface, and is composed of a mixture of epoxy resin and nano-alumina as a matrix; the glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface are alternately arranged layer by layer, and the first layer of fibers adjacent to the heat-insulating layer is glass fibers, and the arrangement direction is parallel to the friction direction of the center line of the brake disc, and the 3nth layer is basalt fibers, the 3n-1st and 3n-2nd layers are glass fibers, the angle between the 3n-1st and 3n-2nd layers is 30°, the angle between the 3n-1st and 3n-2nd layers is 60°, and 14≤n≤63. The advantages are reasonable proportioning, perfect and compact process, high strength, high temperature resistance, and light weight.

Description

Technical Field

[0001] The invention relates to the field of brake components, and in particular to a lightweight, high-strength, and high-temperature-resistant brake component back plate material and a preparation method thereof. Background Art

[0002] The friction plate assembly used in the automotive industry usually consists of a friction plate and a backing plate that is bonded to the friction plate.

[0003] The existing back plate outer surface adopts a single plane design, which has a certain weight and a high manufacturing cost, thereby making the weight and cost of the entire friction plate assembly relatively high. Therefore, it is necessary to develop a lightweight back plate structure of the brake pad assembly. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a lightweight, high-strength and high-temperature resistant brake component back plate material and a preparation method thereof, which has ingenious design, reasonable structure, reasonable ratio, perfect and compact process, and has high strength, high temperature resistance and lightweight characteristics.

[0005] The technical solution of the present invention:

[0006] A lightweight, high-strength, and high-temperature-resistant brake component backing plate material and a preparation method thereof. The lightweight, high-strength, and high-temperature-resistant brake component backing plate material consists of a heat-insulating layer, a fiber-reinforced backing plate, and a positioning and crack-stopping pin. The fiber-reinforced backing plate is reinforced by alternately arranging glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface in layers, and a mixture of epoxy resin and nano-alumina is used as a matrix perpendicular to the wear surface; the glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface are alternately arranged in layers, and the first layer of fibers adjacent to the heat-insulating layer is glass fibers, and the arrangement direction is parallel to the friction direction of the center line of the brake disc, and the subsequent 3nth layer is basalt fibers, and the 3n-1 and 3n-2 layers are glass fibers, the angle between the 3n-1 and 3n-2 layers is 30°, and the angle between the 3n and 3n-1 layers is 60°, and 14≤n≤63.

[0007] The matrix of the epoxy resin and nano-alumina mixture has an epoxy resin content of 98.5%-99.7% and a nano-alumina content of 0.3%-1.5% in terms of mass percentage, wherein the particle size of the nano-alumina is 25 nanometers-75 nanometers. The preparation method comprises the following steps: firstly, solid-state dispersion of the nano-alumina particles is performed using an ultrasonic fluidized bed, and the curing agent is stirred at a stirring speed of 20-50 rpm. During the stirring process, the dispersed nano-alumina particles are injected into the curing agent using an air jet method, and the air jet speed is 20-120 m / s. After the injection, stirring is continued for 20-40 minutes, and then the resin is injected into the curing agent. After the resin injection is completed, the curing agent is stirred for 3-5 minutes at a stirring speed of 50-500 rpm to complete the preparation of the matrix material.

[0008] The outer contour surface of the positioning crack-stopping hole pin is obtained by rotating the curve y=sin(n·x) around the X-axis, wherein 4.5≤n≤18, 6mm≤x≤15mm.

[0009] The positioning and crack-stopping hole pin structure is prepared by the following method: phenolic resin is extruded and formed by a continuous extrusion method to prepare an inner cavity structure of the positioning and crack-stopping hole pin, and then the continuous inner cavity structure is injected with water, and the water injection pressure is 1.4-1.5atm, and carbon fiber winding is performed under pressure maintaining state. The carbon fiber used is prepreg carbon fiber, the winding rise angle is 12°-25°, the winding preload force is 210-420N, the number of winding layers is 24-48 layers, and the inner cavity water and ambient temperature are the same during the winding process, both are 120-140°C, and the preparation is completed after winding.

[0010] The advantage of the present invention is that it breaks through the material composition limitation of the steel plate used in the existing brake component back plate, and adopts a resin-based composite material as the brake component back plate. Through the coupling effect of the fiber structure, bionic structure and connection structure, the strength of the composite material back plate is improved, and the influence of high braking temperature on its performance is reduced. At the same time, the risk of brake failure caused by back plate rust can be reduced, and the quality of the overall structure of the brake component is reduced, which effectively promotes normal quality reduction and energy saving and consumption reduction. DETAILED DESCRIPTION

[0011] The following is an introduction and description with reference to specific embodiments: Example

[0012] A lightweight, high-strength, and high-temperature-resistant brake component backing plate material and a preparation method thereof. The lightweight, high-strength, and high-temperature-resistant brake component backing plate material consists of a heat-insulating layer, a fiber-reinforced backing plate, and a positioning and crack-stopping pin. The fiber-reinforced backing plate is reinforced by alternately arranging glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface in layers, and a mixture of epoxy resin and nano-alumina is used as a matrix perpendicular to the wear surface; the glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface are alternately arranged in layers, and the first layer of fibers adjacent to the heat-insulating layer is glass fibers, and the arrangement direction is parallel to the friction direction of the center line of the brake disc, and the subsequent 3nth layer is basalt fibers, and the 3n-1 and 3n-2 layers are glass fibers, the angle between the 3n-1 and 3n-2 layers is 30°, and the angle between the 3n and 3n-1 layers is 60°, and 14≤n≤63. The matrix of the epoxy resin and nano-alumina mixture has an epoxy resin content of 98.5%-99.7% and a nano-alumina content of 0.3%-1.5% by mass percentage, wherein the particle size of the nano-alumina is 25 nanometers-75 nanometers. The preparation method is to firstly disperse the nano-alumina particles in a solid state by using an ultrasonic fluidized bed, and stir the curing agent at a stirring speed of 20-50 rpm. During the stirring process, the dispersed nano-alumina particles are injected into the curing agent by air jet method, and the air jet speed is 20-120 m / s. After injection, stirring is continued for 20-40 minutes, and then the resin is injected into the curing agent. After the resin injection is completed, stirring is performed at a stirring speed of 50-500 rpm for 3-5 minutes to complete the preparation of the matrix material. The outer contour surface of the positioning crack stop pin is obtained by rotating the curve y=sin(n·x) around the X-axis, wherein 4.5≤n≤18, 6mm≤x≤15mm. The positioning and crack-stopping hole pin structure is prepared by the following method: phenolic resin is extruded and formed by a continuous extrusion method to prepare an inner cavity structure of the positioning and crack-stopping hole pin, and then the continuous inner cavity structure is injected with water, and the water injection pressure is 1.4-1.5atm, and carbon fiber winding is performed under pressure maintaining state. The carbon fiber used is prepreg carbon fiber, the winding rise angle is 12°-25°, the winding preload force is 210-420N, the number of winding layers is 24-48 layers, and the inner cavity water and ambient temperature are the same during the winding process, both are 120-140°C, and the preparation is completed after winding.

Claims

1. A method for preparing a lightweight, high-strength, and high-temperature resistant brake component back plate material. It is characterized in that The light, high-strength, and high-temperature resistant brake component back plate material is composed of a heat-insulating layer, a fiber-reinforced back plate, and a positioning and crack-stopping pin. The fiber-reinforced back plate is reinforced by alternately arranging glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface layer by layer, and the epoxy resin and nano-alumina mixture is used as the matrix perpendicular to the wear surface; the glass fibers and basalt fibers parallel to the wear surface and perpendicular to the wear surface are alternately arranged layer by layer, and the first layer of fibers adjacent to the heat-insulating layer is glass fibers, and the arrangement direction is parallel to the friction direction of the center line of the brake disc, and the subsequent 3nth layer is basalt fibers, and the 3n-1 and 3n-2 layers are glass fibers, the angle between the 3n-1 and 3n-2 layers is 30°, and the angle between the 3n and 3n-1 layers is 60°, 14≤n≤63; the epoxy resin The matrix of the mixture of epoxy resin and nano-alumina has an epoxy resin content of 98.5%-99.7% and a nano-alumina content of 0.3%-1.5% according to mass percentage, wherein the particle size of the nano-alumina is 25 nanometers-75 nanometers. The preparation method is as follows: firstly, the nano-alumina particles are solid-state dispersed by an ultrasonic fluidized bed, and the curing agent is stirred at a stirring speed of 20-50 rpm. During the stirring process, the dispersed nano-alumina particles are injected into the curing agent by air jet method, and the air jet speed is 20-120m / s. After the injection, stirring is continued for 20-40 minutes, and then the resin is injected into the curing agent. After the resin injection is completed, stirring is continued for 3-5 minutes at a stirring speed of 50-500 rpm to complete the preparation of the matrix material.

2. A method for preparing a lightweight, high-strength, high-temperature resistant brake component back plate material according to claim 1, It is characterized in that The outer contour surface of the positioning crack-stopping hole pin is obtained by rotating the curve y=sin(n·x) around the X-axis, wherein 4.5≤n≤18, 6mm≤x≤15mm.

3. The method for preparing a lightweight, high-strength, and high-temperature resistant brake component back plate material according to claim 1, It is characterized in that The positioning and crack-stopping hole pin structure is prepared by the following method: phenolic resin is extruded and formed by a continuous extrusion method to prepare an inner cavity structure of the positioning and crack-stopping hole pin, and then the continuous inner cavity structure is injected with water, and the water injection pressure is 1.4-1.5atm, and carbon fiber winding is performed under pressure maintaining state. The carbon fiber used is prepreg carbon fiber, the winding rise angle is 12°-25°, the winding preload force is 210-420N, the number of winding layers is 24-48 layers, and the inner cavity water and ambient temperature are the same during the winding process, both are 120-140°C, and the preparation is completed after winding.