Preparation method of anti-fatigue composite material plate spring

A composite material plate, anti-fatigue technology, used in leaf springs, springs, mechanical equipment, etc., can solve the problems of poor thermal stability of leaf springs, decreased material stability, delamination, etc., and achieve the effect of high fatigue life.

Active Publication Date: 2022-05-13
山东莱蔚特复合材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN107269750A discloses a three-dimensional braided damping composite leaf spring and its preparation method. The prepared composite leaf spring has high fatigue life and strength, but the composite leaf spring will have a static stiffness that increases with the increase in service life. The increase of fatigue times gradually decreases, and then cracking and delamination may occur, which will affect the safety of the vehicle. At the same time, the thermal stability is poor. During the operation of the car, the friction of the leaf spring will generate high temperature, up to 800 ° C, which will lead to material stability. Sexual decline, affecting vehicle safety
[0010] (1) The static stiffness of the existing composite leaf springs decreases more with the increase of fatigue times;
[0011] (2) The thermal stability of the existing composite leaf spring is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Preparation of modified S-type glass fiber

[0055] Immerse the S-type glass fiber in deionized water, add a certain amount of acetic acid to adjust the pH to 6.0, add decamethylcyclopentasiloxane, toluene, isopropanol, and methylcyclohexane, raise the temperature to 60°C, and keep the temperature for 60min , evaporate excess solvent, wash and dry to obtain modified S-type glass fiber;

[0056]The mass ratio of described S type glass fiber and deionized water is 1:3;

[0057] The mass ratio of described decamethylcyclopentasiloxane and S type glass fiber is 1:10;

[0058] The mass ratio of described toluene and S type glass fiber is 2:5;

[0059] The mass ratio of described Virahol and S type glass fiber is 1:5;

[0060] The mass ratio of the methylcyclohexane to the S-type glass fiber is 1:5.

[0061] (2) Epoxy resin modification

[0062] a. Salt modification

[0063] Add barium zirconate to the bisphenol A epoxy resin emulsion, raise the temperature to 80°C ...

Embodiment 2

[0094] (1) Preparation of modified S-type glass fiber

[0095] Immerse the S-type glass fiber in deionized water, add a certain amount of acetic acid to adjust the pH to 5.8, add decamethylcyclopentasiloxane, toluene, isopropanol, and methylcyclohexane, raise the temperature to 55°C, and keep the temperature for 65min , evaporate excess solvent, wash and dry to obtain modified S-type glass fiber;

[0096] The mass ratio of described S type glass fiber and deionized water is 1:2.5;

[0097] The mass ratio of described decamethylcyclopentasiloxane and S type glass fiber is 1:9;

[0098] The mass ratio of described toluene and S type glass fiber is 2:4.5;

[0099] The mass ratio of described Virahol and S type glass fiber is 1:4;

[0100] The mass ratio of the methylcyclohexane to the S-type glass fiber is 1:4.5.

[0101] (2) Epoxy resin modification

[0102] a. Salt modification

[0103] Add barium zirconate to the bisphenol A epoxy resin emulsion, raise the temperature to...

Embodiment 3

[0134] (1) Preparation of modified S-type glass fiber

[0135] Immerse the S-type glass fiber in deionized water, add a certain amount of acetic acid to adjust the pH to 6.3, add decamethylcyclopentasiloxane, toluene, isopropanol, and methylcyclohexane, heat up to 65°C, and keep the temperature for 55min , evaporate excess solvent, wash and dry to obtain modified S-type glass fiber;

[0136] The mass ratio of described S type glass fiber and deionized water is 1:3.5;

[0137] The mass ratio of described decamethylcyclopentasiloxane and S type glass fiber is 1:11;

[0138] The mass ratio of described toluene and S type glass fiber is 2:5.5;

[0139] The mass ratio of described Virahol and S type glass fiber is 1:6;

[0140] The mass ratio of the methylcyclohexane to the S-type glass fiber is 1:5.5.

[0141] (2) Epoxy resin modification

[0142] a. Salt modification

[0143] Add barium zirconate to the bisphenol A epoxy resin emulsion, raise the temperature to 85°C and sti...

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Abstract

The invention discloses a preparation method of an anti-fatigue composite material plate spring. The preparation method comprises the steps of preparing modified S-type glass fibers, modifying epoxy resin and preparing the plate spring. The prepared composite material plate spring is high in strength, the tensile strength ranges from 1647 MPa to 1655 MPa, the compression strength ranges from 1269 MPa to 1278 MPa, and the bending strength ranges from 2251 MPa to 2267 MPa; the prepared composite material plate spring is long in fatigue life, and the fatigue life is 315,000-322,000 times.

Description

technical field [0001] The invention relates to a preparation method of an anti-fatigue composite leaf spring, which belongs to the field of preparation of leaf springs. Background technique [0002] Automobile leaf spring is the most traditional elastic element in automobile suspension system. It is generally composed of several pieces of alloy spring steel with unequal lengths to form a group of spring beams with similar strength. In addition to buffering in the suspension system, It can also be responsible for transmitting all directions of force and moment. At present, most commercial vehicles and a few passenger vehicles still use leaf springs, and the market share of leaf springs is about 98%. [0003] Composite material is a combination of two or more materials, through the effective interface between materials, the performance is better than that of spring steel. Although most vehicles still use leaf springs, with the development of science and technology, composite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L71/00C08L29/14C08K9/06C08K7/14C08K3/24C08K9/02C08K3/04B60G11/10
CPCC08L63/00B60G11/10C08L71/00C08L29/14C08K9/06C08K7/14C08K3/24C08K9/02C08K3/04
Inventor 李伟王强周帅王晓俊刘忠肃任国红张恒海朱鹏许世伟
Owner 山东莱蔚特复合材料有限责任公司
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