Combined type intelligent self-powered damping boring bar

Abstract

The invention discloses a combined type intelligent self-powered damping boring bar which comprises a boring bar, a first piezoelectric ceramic piece, a second piezoelectric ceramic piece, an electrorheological fluid, a big mass block, a positioning check ring, a small mass block, a third piezoelectric ceramic piece, a sealing check ring, a controller and an end cover. The small mass block is arranged in the third piezoelectric ceramic piece; the electrorheological fluid is arranged between the first piezoelectric ceramic piece and the second piezoelectric ceramic piece; the big mass block isarranged in the second piezoelectric ceramic piece; the controller is fixed to the tail part of the boring bar by utilizing the end cover; the inner surface and the outer surface of the third piezoelectric ceramic piece are connected with the controller so as to form a detection circuit; the outer surface of the first piezoelectric ceramic piece and the inner surface of the second piezoelectric ceramic piece are connected with the controller so as to form a self-powered control circuit; and the controller calculates a vibration state of the boring bar according to the detection circuit and controls an electric field applied on the electrorheological fluid so as to change the damp and the rigidity of the electrorheological fluid, so that a vibration absorber can work at the optimal dampingstate.

Description

technical field [0001] The invention relates to a cutting tool, in particular to a combined intelligent self-powered vibration-damping boring bar, which belongs to the technical field of metal cutting. Background technique [0002] In machining, hole machining is usually performed by boring tools. In deep hole machining, the boring bar needs to have a large length-to-diameter ratio. At this time, the boring bar has low rigidity, and cutting chatter is prone to occur, so that the roughness of the machined surface cannot meet the requirements. In order to reduce and suppress the vibration of the boring bar, it is often used Vibration-damped boring bars with vibration absorbers for machining. [0003] Existing vibration-damping boring bars mainly include passive and active types. Among them, passive vibration absorbers cannot automatically adjust stiffness and damping according to working conditions, and are poorly targeted; active vibration absorbers often require external po...

AI Technical Summary

Problems solved by technology

[0003] Existing vibration-damping boring bars mainly include passive and active types. Among them, passive vibration absorbers cannot automatically adjust stiffness and damping according to working conditions, and are poorly targeted; active vibration absorbers often require external power supplies, sensors and actuators. complex structure

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