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A tuned two-degree-of-freedom passive damper

A technology of passive damping and degree of freedom, applied in non-rotating vibration suppression, metal processing machinery parts, maintenance and safety accessories, etc., can solve the problem of narrow vibration suppression frequency band, achieve vibration suppression frequency bandwidth, reduce vibration, and realize convenient Effect

Inactive Publication Date: 2015-11-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the passive form of damper is that the vibration suppression frequency band is relatively narrow

Method used

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  • A tuned two-degree-of-freedom passive damper
  • A tuned two-degree-of-freedom passive damper
  • A tuned two-degree-of-freedom passive damper

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] The present invention is a tuned two-degree-of-freedom passive damper, such as figure 1 , figure 2 , image 3 As shown, it includes a mass block 1, a slider 2, an elastic-damping unit 3, a stiffness adjusting bolt 4, and a stiffness adjusting nut 5.

[0032] Such as Figure 4 , Figure 5 As shown, the mass 1 consists of two pieces, namely an upper mass and a lower mass, which have the same structure and both have a rectangular cross-section. The upper mass block and the lower mass block are located at upper and lower positions respectively and are symmetrical to each other. Such as Figure 4 As shown, the lower surface of the upper mass block and the upper surface of the lower mass block are symmetrically located at the left and right ends, and grooves 101 that penetrate front and rear are designed; and the bottom surface of each groove 101 is d...

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Abstract

The invention discloses a tuned passive damper with two degrees of freedom. The tuned passive damper with the two degrees of freedom comprises mass blocks, sliding blocks, elastic-damping units and rigidity adjusting bolts; grooves are formed in the two ends of each mass block, every two sliding blocks are arranged in one groove and are tightly attached to a thin plate in the corresponding elastic-damping unit, and each thin plate is provided with a sliding groove corresponding to the groove in the corresponding mass block. Each sliding block is located by the corresponding rigidity adjusting bolt penetrating through the corresponding groove and the corresponding sliding groove, so that the distance between the two sliding blocks on the same side of each mass block is adjusted through the corresponding bolts, and rigidity adjustment of the damper is achieved. Besides, a friction plate with the adjustable angle is arranged between the corresponding sliding blocks and the side wall of a base of the corresponding elastic-damping unit, the contact area between each friction plate and the corresponding mass block is changed by adjusting the angle of the corresponding friction plate, and therefore the damping ratio of the damper is adjusted. The tuned passive damper with the two degrees of freedom has the advantages of being simple in structure, convenient to implement and low in cost, having no pollution to the environment, being capable of effectively lowering vibration in a cutting process, and achieving high-efficiency and high-quality machining of parts.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and relates to a machine tool structure and a workpiece vibration reduction device in the metal cutting process. Specifically, it is a two-degree-of-freedom passive damper with adjustable stiffness and damping, so as to realize the high efficiency of metal parts. and high-quality processing. Background technique [0002] In metal cutting, there will be cutting chatter between the tool and the workpiece, which will lead to the deterioration of the machined surface quality of the workpiece and affect the service life of the tool and even the machine tool. At the same time, chatter during processing will also be accompanied by noise, which will affect the health of operators. By setting the damper to improve the dynamic characteristics of the machine tool and compensate the weak rigid mode, the damage caused by cutting chatter can be fundamentally avoided. [0003] There are two types of dampe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/04B23Q11/00
Inventor 杨毅青代巍
Owner BEIHANG UNIV
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