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Rotary variable-rigidity variable-damping vibration attenuation boring bar

A variable stiffness and variable damping technology, applied in the field of rotary variable stiffness variable damping vibration damping boring bars, can solve the problems of machining accuracy and machining efficiency, and achieve the effect of improving machining efficiency and machining accuracy.

Active Publication Date: 2022-05-27
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the vibration generated in the machining process of the existing boring bar affects the machining accuracy and machining efficiency, the present invention further proposes a rotary variable stiffness variable damping vibration damping boring bar

Method used

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  • Rotary variable-rigidity variable-damping vibration attenuation boring bar
  • Rotary variable-rigidity variable-damping vibration attenuation boring bar
  • Rotary variable-rigidity variable-damping vibration attenuation boring bar

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specific Embodiment approach 1

[0025] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this embodiment, a rotary variable stiffness variable damping vibration reduction boring bar described in this embodiment includes a cutter head connection block 2, a stepping motor 3, a casing 4, an electromagnet 9, a shaft 10, a support sleeve 11, Sleeve 14, rectangular cantilever beam 15, control system 16 and multiple brake components, the middle part of the front end of the shaft 10 is provided with a boring bar cavity 10-1, and the rear end of the cutter head connecting block 2 is inserted into the boring bar In the cavity mouth of the cavity 10-1, the support sleeve 11 is inserted into the front end of the boring bar cavity 10-1, the stepper motor 3 is fixedly connected to the inner side wall of the front end of the support sleeve 11, and the output shaft of the stepper motor 3 It is affixed to the front end of the rectangular cantilever beam 15, the sleeve 14 is set on the front end of the ...

specific Embodiment approach 2

[0034] Specific implementation mode two: combination Figure 1 to Figure 5 This embodiment is described. The rear end of the rectangular cantilever beam 15 in this embodiment is sleeved and fixed to the mass block 8 . Other compositions and connection methods are the same as those in Embodiment 1.

[0035] The mass block 8 designed in this way increases the corresponding area between the rectangular cantilever beam 15 and the electromagnet 3 9 on the one hand, and has the effect of counterweight on the other hand, increases the weight of the rear end of the rectangular cantilever beam 15 and reduces the weight of the rectangular cantilever beam 15 itself. vibration.

specific Embodiment approach 3

[0036] Specific implementation mode three: combination Figure 1 to Figure 5 To describe this embodiment, the front cover 4 - 2 is fixedly connected to the front end surface of the casing 4 in this embodiment, and the casing cover 7 is fixedly connected to the rear end surface of the casing 4 . Other compositions and connection methods are the same as those in the second embodiment.

[0037] Such a design facilitates the installation of the brake assembly.

[0038] The housing cover 7 is provided with a through hole 7-1, and the through hole 7-1 is used for connecting wires to pass through.

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Abstract

The invention discloses a rotary variable-rigidity variable-damping vibration attenuation boring bar, and relates to the technical field of cutting machining. The problem that vibration generated in the machining process of an existing boring rod affects the machining precision and the machining efficiency is solved. The boring rod comprises a tool bit connecting block, a stepping motor, a shell, a third electromagnet, a rod body, a supporting sleeve, a sleeve, a rectangular cantilever beam, a control system and a plurality of band-type brake assemblies, the supporting sleeve is inserted into the front end of a cavity of the boring rod, an output shaft of the stepping motor is fixedly connected with the front end of the rectangular cantilever beam, and the sleeve is arranged at the front end of the rectangular cantilever beam in a sleeving mode; the shell is arranged between the inner side wall of the rear end of the supporting sleeve and the outer side wall of the sleeve, a plurality of grooves are evenly distributed in the inner side wall of the shell in the circumferential direction, each band-type brake assembly is arranged in one groove, the third electromagnet is fixedly connected to the cavity bottom of the boring rod cavity, and the control system is arranged on the outer side of the rod body. The stepping motor, the band-type brake assembly and the third electromagnet are electrically connected with the control system through connecting wires. The boring cutter is used for boring.

Description

technical field [0001] The invention relates to the technical field of cutting processing, in particular to a rotary variable stiffness variable damping damping boring bar. Background technique [0002] In metal cutting processing, inner hole processing accounts for about 33% of the total processing, and ultra-deep hole processing is mostly related to major fields such as aerospace and energy equipment. [0003] Boring tools are widely used in deep hole machining. However, due to the low rigidity of the cantilever beam structure of the boring bar, when the long-diameter ratio of the boring bar is relatively large, vibration often occurs. To process inside the workpiece, the working conditions are closed and the real-time processing state of the boring bar cannot be directly observed. The contact between the boring bar and the workpiece is affected by vibration, cutting heat and cutting force. When the processing state of the boring bar is poor , will cause damage to the sur...

Claims

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Application Information

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IPC IPC(8): B23B29/02
CPCB23B29/022Y02P70/10
Inventor 刘强周强马晶韩伟
Owner HARBIN UNIV OF SCI & TECH
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