High-speed high-temperature hydraulic load-adjustable knife-chip friction device and friction measuring method

Abstract

The invention provides a high-speed high-temperature hydraulic load-adjustable knife-chip friction device and a friction measuring method and belongs to the technical field of high-speed cutting. The friction device comprises a friction execution component and a hydraulic component, wherein the friction execution component comprises a hydraulic cylinder, a grinding wheel, a disc type friction piece and a dynamometer, the grinding wheel is arranged on the end surface of the disc type friction piece; the hydraulic cylinder is arranged on the dynamometer; one end of a knife material rod is arranged on a piston rod of the hydraulic cylinder, and a preset distance is reserved between the other end of the tool material rod and the disc type friction piece; the hydraulic component is used for providing driving pressure of 0-10 MPa for the hydraulic cylinder; friction factors between the tool material rod and the disc type friction piece are measured by the dynamometer; the local point temperature is measured by a thermoelectric couple, and a relation between measuring point temperature and friction end surface temperature is established through a heat conduction finite element calculation model, so that the friction end surface temperature is obtained by calculation. The high-speed high-temperature hydraulic load-adjustable knife-chip friction device can realize the simulation and the test of high-speed cutting knife-chip friction under the high speed, high temperature and variable load conditions and has the characteristics of high efficiency and low vibration.

Description

technical field [0001] The invention relates to a friction experiment device and a friction measurement method, in particular to a high-speed high-temperature hydraulic load-adjustable knife-chip friction device and a friction measurement method, which belong to the technical field of high-speed cutting. Background technique [0002] Machining is one of the mainstream technologies of material removal processing, and high speed is an important development direction. With the application of new technologies such as materials, information and microelectronics, breakthroughs in key technologies such as high-power high-speed electric spindles, high-performance feed systems and superhard wear-resistant and heat-resistant tool materials have been promoted, making high-speed cutting popular in Germany, Japan and Japan. China and other advanced manufacturing countries have developed rapidly and have been widely used in equipment manufacturing, aerospace and mold industries. [0003]...

AI Technical Summary

Problems solved by technology

[0003] The realization and wide application of high-speed cutting technology have aroused people's in-depth discussion on the mechanism of high-speed cutting. Knife-chip friction is one of the most important components of high-speed cutting mechanism. There are many unknown places. The friction factor is related to cutting speed, load, contact area and The correlation mechanism among the influencing factors such as the temperature of the friction end surface is one of the core issues, but the high-speed friction experimental device for studying this mechanism has been lacking, and it needs to be designed independently

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