Structural improvement method for drum brake pad high-precision inner arc grinding machine

Abstract

The invention provides a structural improvement method for a drum brake pad high-precision inner arc grinding machine. According to the method, the overall scheme and structural composition of the drum brake pad inner arc grinding machine are constructed according to the machining and quality requirements for grinding drum brake pads with different inner arc radiuses, different thicknesses and different angles; on the basis, software is adopted for establishing a three-dimensional solid model of the brake pad grinding machine, a finite element method is adopted for establishing a finite element model for key components of the drum brake pad inner arc grinding machine, the deformation condition of the key components of the brake pad grinding machine under the action of static loads is determined, and the static and dynamic performance is analyzed; and an improvement scheme is provided through a control factor method, compared with the performance of each scheme, the improvement scheme of the brake pad grinding machine structure is finally determined, the structural performance of the improved brake pad grinding machine is greatly improved, and a foundation is laid for obtaining a drum brake pad inner arc grinding machine with better performance.

Description

technical field [0001] The invention relates to a method for improving the structure of a brake pad internal arc grinder, in particular to a method for improving the structure of a drum-type brake pad high-precision internal arc grinder, and belongs to the technical field of brake pad grinder structures. Background technique [0002] The role of automobiles in today's society is becoming more and more important, but the number of automobile accidents is also rising. According to incomplete statistics, among all traffic accidents, traffic accidents caused by brake pad failure account for more than 30%. The quality of moving films is getting more and more attention. As an important part of the production process of automobile brake pads, the inner arc grinder of drum type brake pads is directly determined by the processing accuracy and surface roughness of the brake pads, which is related to the quality of automobile brakes. Reliability and safety of car driving. Automobile ...

AI Technical Summary

Problems solved by technology

[0009] One is that there are obvious weak links in the static and dynamic performance of the brake pad grinding machine bed in the prior art. From the analysis of the layout of the bed structure ribs, the number of ribs, the thickness of the bed and the ribs, there are obvious deficiencies. The wall thickness and the thickness of the rib plate are thicker, and the first-order natural frequency of the bed is lower; the weight of the bed is larger, and the bed structure needs to be improved urgently;

[0010] The second is that the static and dynamic analysis of the operating platform of the brake pad grinding machine in the prior art shows obvious weak points. The structural design of the operating platform is unreasonable, the quality of the operating platform is large, and the static performance is poor; the first-order natural frequency of the operating platform is smaller than that of the drive motor. frequency, it is easy to cause vibration due to the excitation of the drive motor, which has a great impact on the machining accuracy of the drum brake pad, and the brake pad grinder operation table has obvious technical shortcomings;

[0011] The third is that the improvement of the structure of the inner arc grinding machine for drum brake pads in the existing technology is basically based on experience, lacking the establishment of a solid model of the inner arc grinding machine for drum type brake pads, the lack of analysis of its key components, and the lack of the use of finite element method The finite element model is established for the key components of the inner arc grinding machine of the drum brake pad, and the deformation of the key components of the brake pad grinding machine under the action of static load is lacking, the equivalent strain and equivalent stress diagram analysis of the corresponding structure is lacking, and the theory and technology are lacking. It is difficult to effectively improve the structural performance of the grinding machine through the structural improvement of the support;

[0012] Fourth, the existing technology lacks the static performance analysis of the key components of the brake pad grinder, lacks the dynamic analysis of the brake pad grinder, and cannot guarantee that the brake pad grinder will not be in the process of grinding the inner arc surface of the brake pad. It will affect the grinding accuracy of drum brake pads due to the large vibration caused by the excitation of the drive motor

The natural frequency of the grinding machine bed in the prior art is relatively small, and its vibration at the grinding part of the brake pad will directly affect the processing accuracy of the brake pad, which is the weak link in the construction process of the entire brake pad grinder

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