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Method for reducing self-excited vibration of deep-hole processing boring bar and power vibration damping boring bar thereof

A technology of self-excited vibration and dynamic vibration reduction, applied in the direction of boring bars, etc., can solve the problems of verification, no design of boring bars, processing, etc., and achieve the effect of improving quality, simple structure, and suppressing vibration

Inactive Publication Date: 2010-06-30
CHENGDU AIRCRAFT INDUSTRY GROUP +1
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Problems solved by technology

At present, most domestically only conduct theoretical analysis and simulation analysis on dynamic damping boring bars, and have not yet designed a set of boring bars that can be used in practice, and have not verified them in laboratories and on-site processing.

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  • Method for reducing self-excited vibration of deep-hole processing boring bar and power vibration damping boring bar thereof
  • Method for reducing self-excited vibration of deep-hole processing boring bar and power vibration damping boring bar thereof
  • Method for reducing self-excited vibration of deep-hole processing boring bar and power vibration damping boring bar thereof

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Embodiment Construction

[0021] refer to figure 1 , figure 2 . According to the present invention, a theoretical model of the dynamic damping boring bar is established and optimized to obtain optimized initial values ​​and preliminary structural design values. Then the simulation model is built on the basis of the theoretical model and optimized. Finally, the boring bar is designed according to the optimization calculation results, and the shock absorber parameters are selected. If it is necessary to modify the shock absorber parameters of the dynamic damping boring tool, the optimization calculation can be performed again through the simulation model to obtain new shock absorber parameters and adjust the dynamic shock absorber.

[0022] 1) In the theoretical model, the dynamic shock absorber can be simplified into a two-degree-of-freedom vibration system. Depend on figure 2 The mechanics model shown is set to the damping model. Among them, m2 is the mass of the damping rod, k2 is the ideal el...

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Abstract

The invention provides a method for reducing the self-excited vibration of a deep-hole processing boring bar, a vibration damper designed by utilizing the method for selecting parameters of the vibration damper has the advantages of simple structure and convenient detachment and can modify the parameters of the vibration damper of a power vibration damping boring cutter according to the needs at any time, the vibration damper consists of a vibration damping rod, damping fluid and rubber rings, and the vibration damper can effectively suppress the vibration during the processing. The method is realized through the following technical scheme: (1) establishing a theoretical model of a power vibration damping boring bar; (2) establishing a simulation model on the basis of the theoretical model and selecting the parameters of the vibration damper; (3) selecting finite element analysis software ANSYS and multi-body dynamics simulation software ADAMS for jointly establishing a dynamics simulation model of a vibration damping system and constituting a rigid-flexible coupling model; (4) designing a physical vibration damping boring bar model according to the models; and (5) selecting the vibration damping rod; and using the vibration damping rod with sheathed rubber rings at two ends and a boring bar inner hole for constituting the vibration damper, wherein the boring bar inner hole is arranged deep at one end and sealed by a plug, and the damping fluid is filled in the inner cavity of the boring bar inner hole.

Description

technical field [0001] The invention relates to a method for reducing the self-excited vibration of a boring bar for deep hole processing, especially a method for reducing the self-excited vibration of a boring bar for small-diameter deep hole processing. The invention also relates to a dynamic vibration-absorbing boring bar manufactured using the method. Background technique [0002] Deep hole machining is a recognized technical problem in the field of metal cutting, and sometimes product performance has to be sacrificed to meet the processing technology requirements. The bottle cavity at the bottom of the deep hole is more difficult to process. The workpiece with the deep hole bottle cavity structure as shown in Figure 6 further restricts the diameter of the boring bar and the structure is further restricted. During the boring process of the hole, the boring bar with the aspect ratio less than 4 will not produce vibration when machining the workpiece. When the length-to-d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B29/02
Inventor 张文光赵苏军张林丁国富谢斌斌黎荣
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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