Laser Rockwell hardness standard device and measuring method

Abstract

The invention relates to a laser Rockwell hardness standard device and a measuring method, discloses a Rockwell hardness device, and relates to a standard device under an international Rockwell hardness new definition, belonging to the technical field of hardness measurement. Automatic force value loading and high-accuracy real-time control are realized through an intelligent force loading closed loop feedback control system; the design and the development of the system are automatically measured through the indentation depth of a laser Michelson heterodyne interferometry principle to realize high accuracy and high reliability of the indentation measurement so as to meet the specific requirements of the international new definition on force value loading speed, force value loading accuracy, force value holding time and the like.

Description

Technical field [0001] The invention relates to a laser Rockwell hardness standard device and a measuring method, a Rockwell hardness device, which relates to a standard device under the new international Rockwell hardness definition, and belongs to the technical field of hardness measurement. Background technique [0002] At present, the definition of parameters in the Rockwell hardness test process appears to be relatively broad, and the control is weak, resulting in large differences in measurement results. The International Conference on New Definition of Rockwell Hardness in 2006 made a new strict definition of Rockwell hardness, and added the parameter control curve of the intermediate link control in the test process, but the existing devices cannot meet the requirements, intelligent loading laser Rockwell hardness standard device It was produced under this demand. [0003] The intelligent loading laser Rockwell hardness standard device mainly includes two parts: force load...

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Problems solved by technology

[0002] At present, the definition of parameters in the Rockwell hardness test process is relatively broad, and the control is weak, resulting in large differences in measurement results.

The 2006 International Conference on the New Definition of Rockwell Hardness made a new strict definition of Rockwell hardness, and added a parameter control drawing curve for the control of intermediate links in the test process, but none of the existing devices can meet the requirements. Intelligent loading laser Rockwell hardness standard device It was generated under this demand

[0004] The force value reproduction accuracy of the static weight structure is undoubtedly the highest, but the degree of automation is low; the structure of hydraulic pressure, weight lever and electric loading is small, but the force value accuracy is difficult to guarantee

The biggest disadvantage of the reading microscope measurement method is that it uses the human eye reading method, which has a large measurement error

In addition, two readings of the zero position and the measurement position are required to measure the indentation depth, which is cumbersome to operate and has a low degree of automation

The disadvantage of the grating measurement method is that the measurement accuracy is low, and the requirements for the use environment are high, especially susceptible to the influence of the force loading system structure, etc., making it difficult to ensure the repeatability of the zero position, increasing the measurement error coefficient, and the stability is not easy to guarantee

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