Bottom mold fixture device for metallographic sample automatic grinding and polishing machine

Abstract

The invention discloses a bottom die clamp device for an automatic polish-grinding machine of a metallographic specimen, comprising a bottom die, connecting mechanisms and a clamp mechanism. The connecting mechanisms each comprise a boss and a positioning pin, the boss is of a stair-stepping cylindrical boss which comprises a big cylindrical boss and a small cylindrical boss, the bottom die is of a round bottom die, a bottom surface of the bottom die is provided with a mounting groove which is of a stair-stepping groove, the mounting groove comprises a first groove and a second groove communicated with the first groove, the clamp mechanism comprises a first adjustment block and a fixing piece, the first adjustment block is of a wedge block, and the width of the first adjustment block increases gradually from top to bottom. The bottom die clamp device is reasonable in design, simple and convenient in operation, strong in adaptability and good in positioning effect, can improve the polish-grinding quality of the metallographic specimen and the metallographic analysis accuracy, and is high in accuracy and strong in practicability.

Description

technical field [0001] The invention belongs to the technical field of metallographic sample grinding and polishing, and in particular relates to a bottom mold fixture device for a metallographic sample automatic grinding and polishing machine. Background technique [0002] Materials are the material basis of human production and life. The mechanical properties of metal materials are not only related to their chemical composition, but also closely related to their organizational structure. Therefore, it is necessary to conduct metallographic analysis to understand the relationship between various materials. However, before metallographic analysis , it is necessary to prepare metallographic samples for observation and inspection. The preparation of metallographic samples includes sampling, inlaying, grinding and polishing, so the quality of metallographic samples is ultimately determined by the polishing process. The polishing of metallographic samples is an important link in...

AI Technical Summary

Problems solved by technology

However, the bottom mold fixture of the current metallographic sample automatic grinding and polishing machine cannot adapt to multiple metallographic samples to be processed, and there are some shortcomings:

[0003] First, the current indenter on the metallographic sample automatic grinding and polishing machine has four circular holes, which is not suitable for rectangular thin plate samples, 0.5T-CT samples, and nuclear power welded joint samples prepared in the laboratory at the safety end of the nuclear power primary circuit, etc. dimensional requirements, unable to achieve automatic grinding and polishing;

[0004] Second, the current automatic grinding and polishing machine for metallographic samples needs to manually operate the grinding and polishing of metallographic samples, which is easy to cause uneven force on the metallographic sample. After grinding and polishing, the processed surface of the metallographic sample cannot meet the precision requirements , the grinding and polishing effect is not good;

[0005] Third, when the speed of the grinding and polishing disc in the automatic metallographic sample grinding and polishing machine is too high, if the grinding and polishing is manually operated, not only the quality of grinding and polishing cannot be guaranteed, but also the metallographic sample may fly out and hurt people or damage the experimental equipment, etc. question;

[0006] Fourth, the pressure head on the metallographic sample automatic grinding and polishing machine is directly pressed on the upper surface of the metallographic sample, the metallographic sample is not uniformly stressed and the stress on the grinding and polishing disc is too large, which affects the speed of the grinding and polishing disc;

[0007] Fifth, after the pressure head on the metallographic sample automatic grinding and polishing machine is against the metallographic sample, the degree of freedom in the horizontal direction of the metallographic sample cannot be restricted, and the metallographic sample is easy to move with the rotation of the grinding and polishing disc, and grinding and polishing cannot be realized;

However, in the prior art, there is no suitable metallographic sample automatic grinding and polishing machine bottom mold fixture

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