Friction experiment device for friction performance test of cutting tool coating

Abstract

The invention relates to the technical field of friction wear test and especially relates to a friction experiment device for friction performance test of a cutting tool coating. The friction experiment device comprises a rotary fixation mechanism, a cutting mechanism, a feed action mechanism, a friction mechanism, a data acquisition mechanism and a pressure regulating mechanism. The rotary fixation mechanism comprises a three-jaw chuck, a first drive device for driving the three-jaw chuck to rotate circumferentially, and a cylindrical workpiece fixedly arranged on a three-jaw chuck and used for friction test. The cutting mechanism comprises a base, a cutting base, a turret mounted on the cutting base and a cutting tool mounted on the turret. The cutting tool is located beside the cylindrical workpiece. The friction experiment device can ensure having enough contact pressure and meanwhile, having longer test time.

Description

technical field [0001] The invention relates to the technical field of friction and wear testing, in particular to a friction experiment device for testing the friction performance of tool coatings. Background technique [0002] In the context of global competition, in order to improve the efficiency of production and processing, the current industry usually adopts very high cutting speed for the processing of cutting tools. High mechanical stress and temperature are generated, which leads to excessive wear and even premature failure of the tool during production and processing, and ultimately leads to a high scrap rate. Therefore, in order to prevent such a situation from happening, it is necessary for us to establish an accurate simulation of the cutting process to determine the best cutting conditions from the aspects of tool material, tool geometry and coating, etc., so as to maintain a high machining operation productivity and reduce scrap Rate. [0003] In order to s...

AI Technical Summary

Problems solved by technology

Simulated higher contact pressures (up to 3 GPa) at high sliding velocities (up to 400 m / min) designed by Zemzemi et al. showed high efficiency in providing relevant coefficients of friction, however, their invented device was very difficult to manage and the workpiece Very long and expensive to manufacture

In addition, the friction duration of this device is very limited (approximately 10 seconds), making it impossible to perform long-term wear tests

Hedenqvist et al. proposed a device with a pin of cylindrical geometry rubbing against a rotating surface that could generate sufficient velocity (hundreds of m / min) and be tested for long periods of time, but could not provide sufficient local pressure (approx. 15MPa) to simulate the tribological phenomena that occur during machining

[0005] It can be seen that in the prior art, there is no device that can provide sufficient contact pressure and have a long test time for testing the cutting friction force of the tool

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