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Steel wire driving type variable-rigidity damping vibration attenuation boring bar

A variable stiffness, driving technology, applied in the direction of boring bars, etc., can solve the problems of small cutting parameters, affecting processing efficiency, etc., to achieve the optimal working state and the effect of adjustment

Active Publication Date: 2021-12-21
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In actual machining, in order to effectively reduce the vibration of the tip of the boring insert, smaller cutting parameters are usually used, which affects the machining efficiency

Method used

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  • Steel wire driving type variable-rigidity damping vibration attenuation boring bar
  • Steel wire driving type variable-rigidity damping vibration attenuation boring bar
  • Steel wire driving type variable-rigidity damping vibration attenuation boring bar

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Experimental program
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Effect test

specific Embodiment approach 1

[0033] Specific implementation mode one: the following combination Figure 1 to Figure 5 Describe this embodiment, the steel wire driving type variable stiffness damping damping boring bar described in this embodiment,

[0034] Including boring bar 6, damping structure and stiffness adjustment unit;

[0035] The boring bar 6 is provided with a front-end opening cavity, and a vibration-damping structure is arranged in the front-end opening cavity. The vibration-damping structure is used to slow down the micro-movement of the boring bar caused by cutting. There is a gap between the vibration-damping structure and the inner wall of the boring bar 6 Uniform radial clearance; a cutter head connector 1 is arranged at the front opening of the front opening cavity;

[0036] The stiffness adjustment unit realizes the adjustment of the stiffness of the damping structure by adjusting the distance between the slider 3 and the front end of the boring bar 6 .

[0037] The damping structur...

specific Embodiment approach 2

[0049] Specific implementation mode two: the following combination figure 1 with2 This embodiment will be described. The first embodiment will be further described in this embodiment, and the rubber ring 13 is also included. The rubber ring 13 is arranged between the inner arms of the two slider fixing rings 4 and the cantilever beam 12 .

specific Embodiment approach 3

[0050] Specific implementation mode three: the following combination Image 6 Illustrate this embodiment, this embodiment is described further to embodiment one or two, also comprises control unit, and described control unit is used for controlling the operation of stepper motor 18, and control unit comprises motor drive module 19 and single-chip microcomputer 20, and single-chip microcomputer 20 The stepper motor 18 is controlled by the motor drive module 19 to rotate forward or reversely, and the steel wire 11 is pulled to drive the vibration-damping structure to move forward and backward.

[0051] The control process for variable stiffness of the damping structure: install the slider fixing ring 4 at both ends of the slider 3 respectively, and fix it with the bolt 5. The rubber ring 13 is installed in the inner hole of the slider fixing ring 4, and slides with the cantilever beam 12. The slider The coil 2 is wound in the middle. The cantilever beam 12 is fixed on the cutte...

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Abstract

The invention discloses a steel wire driving type variable-rigidity damping vibration attenuation boring bar, belongs to the technical field of metal cutting machining, and aims to solve the problem of vibration of the tip of a boring blade when a deep hole is bored. The steel wire driving type variable-rigidity damping vibration attenuation boring bar comprises a boring rod, a vibration reduction structure and a rigidity adjusting unit; the boring rod is provided with a cavity with an opening in the front end, a vibration reduction structure is arranged in the cavity with the opening in the front end, the vibration reduction structure is used for relieving boring rod micromotion caused by cutting, and a uniform radial gap exists between the vibration reduction structure and the inner wall of the boring rod; a tool bit connecting piece is arranged at the opening of the front end of the cavity with the opening in the front end; and the rigidity adjusting unit adjusts the rigidity of the vibration reduction structure by adjusting the distance between the sliding block and the front end of the boring rod. The vibration reduction structure is installed in the cavity in the front end of the boring rod, the vibration reduction performance is adjusted by adjusting the rigidity and damping of the vibration reduction structure, and the vibration reduction performance of the boring rod is optimal.

Description

technical field [0001] The invention relates to a vibration-damping boring bar structure, which belongs to the technical field of metal cutting. Background technique [0002] Deep hole boring has always been a difficult point in the field of mechanical processing. The difficulty lies in the fact that the boring bar needs to go deep into the interior of the workpiece during the deep hole boring process. The longer the hole depth of the workpiece, the longer the overhang length of the boring bar, and the stiffness of the boring bar decreases with the increase of the overhang length, which leads to deformation of the boring bar with accompanying vibration behavior. The vibration of the boring bar will cause the vibration of the tip of the boring blade, and the vibration of the tip of the boring blade will affect the machining accuracy of the deep hole and the smoothness of the inner wall. In severe cases, the workpiece will be unqualified or even scrapped. In addition, the vib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B29/02
CPCB23B29/022
Inventor 刘强周强马晶韩伟张志聪
Owner HARBIN UNIV OF SCI & TECH
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