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Vibration reducing device used for machining of annular thin-wall part

A technology for thin-walled parts and vibration damping devices, which is used in metal processing equipment, metal processing mechanical parts, manufacturing tools, etc., can solve the problem that the radial support force cannot cover the parts evenly, the stiffness and dynamic stability are poor, and the vibration damping effect is poor. problems, to shorten the production cycle, improve rigidity and dynamic stability, reduce the effect of machining vibration

Active Publication Date: 2017-12-19
AECC AERO SCI & TECH CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the rigid support tooling of this structure can provide radial support to the processed annular thin-walled parts, the radial support provided cannot cover the surface of the part uniformly, and the vibration damping effect is poor, so the processed annular The rigidity and dynamic stability of thin-walled parts are poor, and it is difficult to ensure the processing quality

Method used

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  • Vibration reducing device used for machining of annular thin-wall part
  • Vibration reducing device used for machining of annular thin-wall part
  • Vibration reducing device used for machining of annular thin-wall part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The damping device in this embodiment is used to process the combustion chamber casing of a certain type of engine. The material of the combustion chamber casing is a high-temperature nickel-based alloy, with a wall thickness of 3 mm to 6 mm, a height of 590 mm, and a diameter of For annular thin-walled parts, such as Figure 11 shown.

[0069] The damping device in this embodiment is as figure 1 , figure 2 , image 3 , Figure 4 As shown, it includes a base 7, twelve pressure plates 6 installed on the base for fixing the lower part of the processed annular thin-walled part, an axial limit assembly, a damping absorber 2, a gas damper and an intelligent pressure regulating system 8.

[0070] The axial limit assembly is composed of a pillar 5 and an upper cover plate 1. The pillar 5 is a cylindrical structure, and the lower end is provided with a flange connected to the base. The pillar is installed on the base through the flange and fixed with screws. The centerl...

Embodiment 2

[0087] The damping device in this embodiment is used to process the rear case of a high-pressure compressor of a certain type of engine. The material of the rear case of the high-pressure compressor is a high-temperature nickel-based alloy, the thinnest wall thickness is 2mm, the height is 274mm, and the diameter For annular thin-walled parts, such as Figure 15 shown.

[0088] The vibration damping device in this embodiment has the same overall structure as that in Embodiment 1, including twelve pressure plates 6 installed on the base for fixing the lower part of the processed annular thin-walled part, an axial limit assembly, and a damping absorber 2. Gas damper and intelligent pressure regulation system8. Difference with embodiment 1 is: (1) airbag 4 is two rubber annular airbags, and the airbag inflated gas is helium; (2) expansion block 3 is four nylon expansion blocks, and its shape and size are according to being Design of processing ring-shaped thin-walled parts; (3...

Embodiment 3

[0100] The damping device in this embodiment is used to process the front case of a high-pressure compressor of a certain type of engine. The rear case of the high-pressure compressor is a pair of open case, the material is TC2, the thinnest wall thickness is 1.9mm, the height is 530mm, and the diameter is 530mm. Such as Figure 19 shown.

[0101] The vibration damping device in this embodiment has the same overall structure as that in Embodiment 1, including twelve pressure plates 6 installed on the base for fixing the lower part of the processed annular thin-walled part, an axial limit assembly, and a damping absorber 2. Gas damper and intelligent pressure regulation system8. The difference from Example 1 is: (1) the gas inflated by the airbag 4 is nitrogen; (2) the shape and size of the inflatable block 3 are designed according to the processed annular thin-walled part; (3) the thickness of the damping absorbing part 2 is 20mm .

[0102] Using the damping device describ...

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Abstract

The invention provides a vibration reducing device used for machining of an annular thin-wall part. The vibration reducing device comprises a base, a pressing plate, an axial limiting assembly, a damping wave absorbing piece, a gas damper and an intelligent pressure adjusting system; the axial limiting assembly is composed of a supporting column and an upper cover plate, and the supporting column is installed on the base; the gas damper is composed of an airbag and at least two bulging type blocks, the airbag is an annular airbag, the supporting column is sleeved with the air bag, and all bulging type blocks are placed on the base in a surrounding mode and connected with the airbag; the number of the damping wave absorbing piece is the same as the number of the bulging type blocks, and the damping absorbing piece are pasted on the outer sides of the corresponding bulging type blocks; the upper cover plate is placed at the upper end of the machined annular thin-wall part and connected with the supporting column; and the intelligent pressure adjusting system is used for adjusting the gas pressure in the airbag. Combination of the gas damper, the damping wave absorbing piece and the axial limiting assembly greatly reduces machining vibration, deformation of the machined annular thin-wall part in the X, Y, Z directions is restricted, and stiffness and dynamic stability of the part are improved.

Description

technical field [0001] The invention belongs to thin-wall parts processing tooling, in particular to a vibration damping device used in the processing of ring-shaped thin-wall parts. Background technique [0002] Annular thin-walled parts have poor rigidity and lack static strength and dynamic stability against cutting forces. As a result, the parts become dynamically unstable and vibrate, and chatter is a key issue affecting the processing quality and production efficiency of annular thin-walled parts. Therefore, tooling must be used for processing annular thin-walled parts. [0003] In the prior art, the tooling usually used for processing annular thin-walled parts is a rigid support tooling, such as Figure 9 , Figure 10 As shown, it is mainly composed of a base and rigid inner support blocks. The number of rigid inner support blocks is at least three, and each rigid inner support block is installed on the base at equal intervals around the center of the base. The arc ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q11/00B23Q17/00
CPCB23Q11/00B23Q11/0032B23Q17/00
Inventor 李湉张晟玮唐鋆磊赵小勇周兆钢赖家云安全乐张海龙罗一琳周小文张世贵曾云龙
Owner AECC AERO SCI & TECH CO LTD
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