An Eddy Current Rotary Variable Stiffness Damper

Abstract

The invention discloses an electric-eddy-current rotation-transformation rigidity damper which comprises a mass block, a supporting frame, bolts, cover plates and a permanent magnet, wherein the mass block is mounted in a cylindrical groove of the supporting frame; the cover plates are fixedly arranged on the upper surface of the supporting frame through the bolts; meanwhile, the positions of the mass block in the supporting frame are fixed by the bolts through the cover plates; the permanent magnet is mounted in a cylindrical groove of the mass block. The electric-eddy-current rotation-transformation rigidity damper serves as a vibration reduction device in the field of machining, can effectively inhibit the cutting chatter of a thin-wall part, and guarantees a high-quality and high-efficiency machining process of the thin-wall part; when the mass block and the supporting frame generates relative motion, the electric-eddy-current rotation-transformation rigidity damper generates an electric eddy current effect, so as to obstruct the vibration of the supporting frame, and further inhibit the vibration of the thin-wall part; the electric-eddy-current damping is non-contact damping, and can inhibit multi-stage vibration modes; the electric-eddy-current rotation-transformation rigidity damper can accurately regulate the rigidity of the damper, so as to more conveniently and quickly match the rigidity of the thin-wall part, and more effectively inhibit the vibration of the thin-wall part; the electric-eddy-current rotation-transformation rigidity damper is simple in structure, convenient to mount and low in cost, has no pollution to an environment, and is wide in scope of application.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and relates to a device for suppressing cutting chatter of thin-walled parts. Specifically, it is an eddy current rotary variable stiffness damper that can quickly adjust the natural frequency through the direction of the rotary damper. The vibration suppression frequency has a wide bandwidth. The adjustment is convenient and quick, and it is suitable for the rigidity change process of thin-walled parts during the cutting process to ensure the processing quality and efficiency of thin-walled parts. Background technique [0002] During the metal cutting process, cutting chatter often occurs between thin-walled parts and tools, resulting in increased spindle power, low processing quality and efficiency of thin-walled parts, and increased tool wear. The noise from cutting chatter will also cause certain harm to the health of operators. The original intention of the present invention is to impro...

AI Technical Summary

Problems solved by technology

However, the traditional passive form damper also has certain defects: it can only suppress specific modes, although the effect is obvious, but the suppression frequency is too narrow, and the vibration suppression effect on thin-walled parts whose dynamic characteristics change rapidly during the cutting process is limited; most The damper is a contact type, and the frictional consumption causes the damper to be easily damaged and failed

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