Adjustable hardness test fixture

Abstract

The invention discloses an adjustable hardness test fixture. A pedestal is arranged on a chassis, a left supporting frame and a right supporting frame are symmetrically installed on both sides of thepedestal, a positioning disk is connected to the tops of the left supporting frame and the right supporting frame, the section of a fixture seat takes the shape of a major arc, a guide groove is formed in the fixture seat, a sliding sleeve is sleeved on the periphery of the middle segment of the fixture seat, an objective table is arranged on the sliding sleeve, a tooth surface clamping block is connected to a left-handed screw, a plane clamping block is connected to a right-handed screw, and adjusting screws are installed on upright posts. By adoption of the adjustable hardness test fixture disclosed by the invention, a tested workpiece of any shape can be pressed and fixed, the operation is stable, the hardness test is met, and the phenomenon that when the hardness test is performed on an irregular tested workpiece, bias pressing is generated due to the unstable fixation, resulting in a large deviation between the measured hardness and the actual hardness, is solved. The working efficiency of inspectors can be greatly improved, the accuracy and stability of the microhardness test are ensured, and the applicability is wide.

Description

technical field [0001] The invention relates to the technical field of microhardness testing equipment, in particular to an adjustable hardness testing jig. Background technique [0002] As a routine physical and chemical testing method, hardness testing is essential in the process of failure analysis and quality inspection. The hardness of a material is the ability of the material to resist local deformation, especially plastic deformation, indentation or scratches. It is an important performance index to measure the degree of softness and hardness of the material. . As one of the hardness tests, microhardness plays an irreplaceable role in surface coating, local deformation, abnormal structure, hardness gradient, thin-section samples, small-size samples, etc., and is often used for hardness testing of various micro-areas. . The surface flatness of the metal sample to be tested for hardness testing is relatively high. Only by ensuring that the indenter of the hardness te...

AI Technical Summary

Problems solved by technology

[0004] In view of the problems raised in the above-mentioned background technology, the present invention provides an adjustable hardness test fixture, which can realize the compression and fixation of any shape of the workpiece to be tested to meet the hardness test; The bias phenomenon that is easy to occur due to loose fixation leads to a large deviation between the measured hardness and the actual hardness; it can greatly improve the work efficiency of inspectors, ensure the accuracy and stability of microhardness testing, and has wide applicability

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