Dynamic friction coefficient measuring systems in material forming process

Abstract

A system for measuring the coefficient of dynamic friction in material forming in the technical field of material processing engineering, comprising: a CNC machine tool handle, a friction head, a test piece fixing table, a piezoelectric sensor platform for a three-phase dynamic instrument, a charge amplifier, and an A / D acquisition computer , the friction head is set under the tool handle of the CNC machine tool, the specimen fixing table is fixed on the piezoelectric sensor platform of the three-phase dynamometer, the piezoelectric sensor platform of the three-phase dynamometer is fixed on the workbench of the CNC milling machine, and the piezoelectric sensor platform of the three-phase dynamometer is fixed on the workbench of the CNC milling machine. The sensor platform is connected with the A / D acquisition computer through the charge amplifier. The invention has the advantages of simple structure, good rigidity, convenient operation, good equipment commonality and accurate and stable results.

Description

technical field [0001] The invention relates to a system in the technical field of material processing, in particular to a system for measuring the coefficient of dynamic friction in material forming processing. Background technique [0002] In the material forming process, there is either mechanical relative movement between the mold and the surface of the workpiece, or the plastic flow of deformed metal, so there is inevitably friction. Friction has an extremely important influence on the plastic forming process. First of all, poor friction and lubrication state can easily lead to defects such as out-of-tolerance product size, unsatisfactory surface quality, and insufficient plastic deformation. Inconsistencies in actual production; severe wear between the mold and the workpiece will also cause premature failure of the mold and increase production costs. Therefore, in order to reasonably control and utilize friction and provide a basis for mold and process design, it is ...

AI Technical Summary

Problems solved by technology

"The disadvantage is that the inertial measurement principle of the mechanical transmission type is used. During the measurement process, the surface friction between the test piece and the turntable needs to drive the turntable to rotate, and there is a lateral direction between the test piece and the test piece fixing groove. The gap makes the contact surface unable to achieve a stable friction contact state, the friction surface is severely worn, and accompanied by a large amount of contact heat, resulting in extremely unstable values ​​and low measurement accuracy

Images