Built-in dynamical double-damping boring bar

A dual-vibration, built-in technology, used in boring bars, boring/drilling, drilling/drilling equipment, etc., can solve the problem of reducing the vibration reduction effect, reducing the stiffness of the boring bar body, and reducing the vibration reduction effect, etc. question

Inactive Publication Date: 2010-11-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to improve the damping effect, it is often necessary to greatly increase the mass of the damping block. The increase in the mass of the damping block means the increase in the length of the damping block, and it is necessary to deepen the inner cavity of the matching boring bar, which in turn Reduce the rigidity of the boring bar body, but reduce the vibration damping effect
[0007]3. The frequency band of the single vibration damping boring bar is narrow. When the excitation frequency changes in a wide range, the vibration damping effect will be significantly worse

Method used

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Examples

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Effect test

Embodiment 1

[0043] The built-in double power damping boring bar used for deep hole processing in this embodiment has a structure as attached Figure 7 As shown, it is composed of a boring bar body 1, an elastic positioning piece rubber ring 2, a cylindrical damping block 3, a baffle plate 4, a sealing ring 5, a damping fluid 7 and a sealing ring 8, and the 6 end of the rod body is designed with a cylindrical shape. There are two cylindrical damping blocks designed in the cavity, which are arranged in the axial direction, and the pipe hole through which the cutting fluid supply pipe 9 passes is processed in the body. The baffle plate 4 is located between the two damping blocks, and its thickness is 35mm. Even if the distance between the two cylindrical damping blocks 3 is kept at 35 mm, the outer ring surface of the rubber ring is in contact with the inner circular surface of the cylindrical cavity of the rod body, and the inner ring face is in contact with the cylindrical surface of the vi...

Embodiment 2

[0046] The built-in dynamic damping boring bar for deep hole processing of this embodiment has a structure as attached Figure 6 shown. The difference between the built-in dynamic damping boring bar for deep hole processing of this embodiment and embodiment 1 is that no baffle plate 4 is provided between the two cylindrical damping blocks 3, and the The distance is guaranteed by the structure of the rubber ring 2 as a positioning part, and the distance between the two is 20mm.

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Abstract

The invention discloses a built-in dynamical double-damping boring bar for processing deep holes, which mainly comprises a bar body, an elastic locating piece and cylindrical damping blocks, wherein, a cylindrical hole cavity is designed on one end of the bar body provided with a tool bit, the two cylindrical damping blocks are axially arranged, and each cylindrical damping block is arranged at the center of the cylindrical hole cavity of the bar body through the elastic locating piece by two ends. Compared with the single-damping boring bar in the prior art, the built-in double-damping boring bar of the invention greatly improves the vibration damping property to achieve good vibration damping property, thus greatly improving boring processing conditions and enhancing the machining precision of workpieces.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to the technical field of large deep hole processing, and more specifically to a boring tool holder. Background technique [0002] During the boring process, the boring tool is in a semi-closed state, and the working conditions of the boring bar are harsh, especially when processing large deep holes. When the boring tool is used to process large deep holes, the overhang of the boring bar is very long, and the overhang length is generally 4 to 10 times its diameter, so it is easy to cause vibration. When the boring bar vibrates radially and tangentially, it will As a result, the hole roughness increases, which seriously affects the accuracy and processing efficiency of boring. Therefore, when processing large deep holes, the vibration of the boring bar is a factor that cannot be ignored. [0003] There are many ways to suppress vibration. At present, the general metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B29/02B23B41/02
Inventor 罗红波李红梅唐才学
Owner SICHUAN UNIV
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