Novel high-precision electrical electronic Brinell hardness tester

Abstract

The invention provides a novel high-precision electrical electronic Brinell hardness tester, comprising a body, a test platform and a pressure head; wherein the test platform drives the tester to lift up and down through hand wheel and screw rod; the pressure head seat is connected with ball spline; the upper portion of the ball spline is connected with a pressure sensor; the upper portion of the pressure senor is orderly connected with a high hardness platform, a high rigidity lever driving the ball spline to do vertical linear motion; the other end of the lever is provided with a precision ball screw pair having an exact guiding device; the ball screw pair is driven by the servo-actuator; the invention is characterized in that: the ball spline is precise; precision of the ball screw pair is higher that 3 class; the lower portion of the test platform is mounted with a piezoelectric ceramic force value loading block composed by overlapping multiple piece of piezoelectric ceramics; the piezoelectric ceramic force value loading block is connecting with the driver. The invention is featured with electric closed-loop controlling the loading, fast, stable and reliable loading, high loading force value precision achieving to + / -0.1%.

Description

technical field [0001] The invention is a novel high-precision electric electronic Brinell hardness tester, which belongs to the structural technical field of measuring products. Background technique [0002] At present, the test force accuracy of the electric Brinell hardness tester in China is ±1%, which is far from the standard machine's accuracy requirement of ±0.1%. However, domestic and foreign Brinell hardness testers using a purely mechanical structure, that is, using weights and counterweights to add force, can meet the standard machine test force accuracy requirements, but the structure is heavy, and due to the large transmission error of the mechanical structure, it is easy to wear and has a long service life. Short, cumbersome manual control, low work efficiency, and large measurement errors. Contents of the invention [0003] The present invention is designed to provide a new type of high-precision electric electronic Brinell hardness tester aimed at the defi...

AI Technical Summary

Problems solved by technology

[0002] At present, the test force accuracy of the electric Brinell hardness tester in China is ±1%, which is still far from the standard machine's accuracy requirement of ±0.1%.

However, domestic and foreign Brinell hardness testers using a purely mechanical structure, that is, using weights and counterweights to add force, can meet the standard machine test force accuracy requirements, but the structure is heavy, and due to the large transmission error of the mechanical structure, it is easy to wear and has a long service life. Short, cumbersome manual control, low work efficiency, large measurement error

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