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Passive type vibration absorption boring bar and optimal vibration absorption performance adjustment method thereof

A passive, boring bar technology, which is applied in the direction of boring bars, manufacturing tools, metal processing machinery parts, etc., can solve the problems of cumbersome debugging steps of intelligent vibration-damping boring bars, and achieve the effect of solving cumbersome debugging steps, simple steps, and easy operation

Active Publication Date: 2017-01-04
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the cumbersome debugging steps of the existing intelligent damping boring bar, the

Method used

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  • Passive type vibration absorption boring bar and optimal vibration absorption performance adjustment method thereof
  • Passive type vibration absorption boring bar and optimal vibration absorption performance adjustment method thereof
  • Passive type vibration absorption boring bar and optimal vibration absorption performance adjustment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0061] Example 1: Combine below figure 1 with figure 2 This embodiment will be described in detail. In the passive vibration-damping boring bar described in this embodiment, a cutter head 1 is provided at the front end of the boring bar, and the cutter head 1 is used for clamping the blade 2;

[0062] Inside the boring bar, a mass 3, a telescopic cantilever beam 4, and a sliding block 5 are sequentially arranged from front to back. One end of the telescopic cantilever beam 4 is fixedly connected to the mass block 3. The telescopic cantilever beam The other end of 4 is fixedly connected with the slider 5;

[0063] The overhanging parts of the mass 3 and the telescopic cantilever beam 4 are both located in the first cavity 6;

[0064] The mass 3 and the overhang portion constitute a variable stiffness vibration absorber, and the variable stiffness vibration absorber can make cantilever vibration in the first cavity 6;

[0065] The sliding block 5 can slide inside the boring bar, there...

Example Embodiment

[0067] Embodiment 2: the following combination figure 2 , image 3 with Figure 8 This embodiment will be described in detail. This embodiment further defines the passive vibration-damping boring bar described in the first embodiment. In the passive vibration-damping boring bar described in this embodiment, a second cavity 8 is provided in the interior of the boring bar near its rear end, and a sliding seat is fixedly provided in the second cavity 8 9. The sliding block 5 can slide in the sliding seat 9.

[0068] The passive vibration-damping boring bar described in this embodiment avoids direct sliding friction between the slider and the vibration-damping boring bar by providing a sliding seat.

Example Embodiment

[0069] Embodiment 3: Combine below Figure 8 This embodiment will be described in detail. This embodiment further defines the passive vibration-damping boring bar described in the second embodiment. In the passive vibration-damping boring bar described in this embodiment, a third cavity 10 is provided between the first cavity 6 and the second cavity 8, and the interiors of the three are connected, and the third cavity The inner diameter of 10 is equal to the diameter of the telescopic cantilever beam 4.

[0070] In this embodiment, the telescopic cantilever beam 4 can slide in the third cavity 10.

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Abstract

The invention discloses a passive type vibration absorption boring bar and an optimal vibration absorption performance adjustment method thereof, belongs to the field of machining, and solves the problem that the steps for adjusting the existing intelligent vibration absorption boring bar are complicated. The boring bar is characterized in that a mass block, a telescopic type cantilever beam and a sliding block are arranged in the boring bar in sequence from front to back; two ends of the telescopic type cantilever beam are fixedly connected with the mass block and the sliding block respectively; the mass block and the overhang part of the telescopic type cantilever beam are located in a first cavity to form a variable-rigidity vibration absorber; the vibration absorber can do cantilever vibration in the first cavity; the sliding block can slide in the boring bar so as to change the overhang amount of the telescopic type cantilever beam; the sliding block is linked with a knob arranged at the rear end of the boring bar. The method comprises the following steps: calculating the equivalent rigidity of the vibration absorber when the amplitude of a bar body of the boring bar is zero; enabling the equivalent rigidity of the vibration absorber to be equal to the equivalent rigidity of the vibration absorber when the amplitude of the bar body of the boring bar is zero by adjusting the overhang amount through the knob. The passive type vibration absorption boring bar is applicable to deep hole boring machining.

Description

technical field [0001] The invention relates to the field of machining, in particular to a passive damping boring bar and a method for adjusting its optimal damping performance. Background technique [0002] Deep hole boring has always been a difficult point in the field of machining. 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 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. [0003] Existing boring bar vibration reduction methods can be divided into passive vibration reduction ...

Claims

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Application Information

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IPC IPC(8): B23B29/02B23Q17/12
CPCB23B29/022B23B2270/48B23Q17/12
Inventor 刘献礼刘强吴石刘丽佳
Owner HARBIN UNIV OF SCI & TECH
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