A two-degree-of-freedom eddy current tuned passive damper

Abstract

A two-freedom-degree electric eddy current tuning passive damper comprises a mass block, supporting frames, cylindrical sticks, stiffness adjusting nuts, permanent magnets and a supporting plate. The cylindrical sticks penetrate the mass block to be connected with the mass block through threads; the cylindrical sticks are in clearance fit with the supporting frames and are screwed up and positioned through the stiffness adjusting nuts on the two sides of the supporting frames; the bottoms of the four supporting frames are located on the same plane; and the permanent magnets are fixed to the supporting plate, the supporting plate is pasted on a workpiece, and the position of the supporting plate is adjusted, so that the two permanent magnets are located under threaded through holes of the mass block. Vibration in cutting machining can be effectively reduced, and efficient high-quality machining of the workpiece can be achieved; the two-freedom-degree electric eddy current tuning passive damper has the better vibration restraining effect; and the damper has fewer components and is easy to manufacture; and damping can be precisely adjusted, and the damper is wide in application range and has the good practicability.

Description

technical field [0001] The invention provides a two-degree-of-freedom electric eddy current tuned passive damper, which relates to a workpiece structure and a workpiece vibration reduction device in the process of metal cutting, specifically, a two-degree-of-freedom whose stiffness and damping can be adjusted separately An eddy current tuned passive damper can effectively achieve a vibration reduction effect to ensure efficient and high-quality processing of metal parts, and belongs to the field of mechanical processing. Background technique [0002] The most common problem in metal cutting is the cutting chatter between the tool and the workpiece. Cutting chatter is an extremely harmful phenomenon that destroys the normal cutting process and is the primary factor affecting the surface quality and machining accuracy of the workpiece. At the same time, the machine tool and the tool service life is also affected. The noise generated by flutter during processing will also caus...

AI Technical Summary

Problems solved by technology

Traditional passive dampers have the following problems: most of the dampers are contact type, and the vibration energy is absorbed and then dissipated. At the same time, the friction consumption of the contact type damper will lead to damage and failure of the eddy current damper; the suppression frequency band is relatively narrow, Effective only when the frequency of the eddy current damper is tuned to the controlled frequency of the structure and the external excitation covers this frequency content

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