Coulomb damping features using ultrasonic welding

一种超声波焊接、阻尼的技术，应用在焊接设备、非电焊设备、机械设备等方向，能够解决疲劳寿命降低等问题

Active Publication Date: 2012-11-21
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, vibration of the structure can lead to reduced fatigue life if the amplitude, frequency and mode structure are not controlled

Method used

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  • Coulomb damping features using ultrasonic welding
  • Coulomb damping features using ultrasonic welding
  • Coulomb damping features using ultrasonic welding

Examples

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Embodiment Construction

[0019] The present invention uses ultrasonic welding to bond selected surfaces of a foil, tape or strip to a surface of an article with the goal of providing a frictionally damped interface between the partially bonded strip and the adjacent article surface. These frictional damping interfaces are formed in portions of vibratory elements or articles that are determined to be likely to be prone to generating or transmitting undesired vibrations. In other embodiments of the invention, the shock absorbing elements of the article or the entire article may be formed by ultrasonically welding successive layers of metal foils or sheets to construct shock absorbing article segments or articles. In this embodiment, non-welded regions are left between one or more layers of the layered structure to provide the desired amount of frictional damping interface.

[0020] In an exemplary embodiment of the invention, the article may be an electric motor for driving one or more wheels of a motor...

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Abstract

Selected surface regions of coulomb vibration damping strips are bonded face-to-face by ultrasonic welding to a surface region of an article that may experience excessive vibration in use. In one embodiment, prior to welding, the intended facing side of the damping strip is treated to form surface regions that are oxidized, roughened, or coating so that the treated regions do not weld to the article surface. In another embodiment of the invention the ultrasonic welding process is controlled so as to produce regions (sometimes randomly interposed regions) of welded and non-welded regions between the damping strip and adjacent article surface. The unbonded regions of the otherwise welded strip lie in closely-spaced, interfacial, frictional contact with the adjacent article surface to damp vibration in the article. Other processes may be used for welding a damping strip to a surface of an article while leaving un-bonded, friction damping regions between regions of the damping strip and the facing surface of the article.

Description

[0001] This application is based on provisional application 61 / 286052, filed December 14, 2009, entitled "Coulomb Damping Features Using Ultrasonic Welding" and non- Provisional application 12 / 902368, which claims priority, is hereby incorporated by reference. technical field [0002] The present application relates to achieving vibration damping in an article by using a thin layer or layers or suitable materials having a combination of surface regions welded to or in the article surface and non-bonding regions frictionally engaging adjacent surfaces. Bonded areas attach the layer to adjacent surfaces, and non-bonded areas of the layer cause Coulomb damping (frictional damping) of adjacent parts of the article to reduce the generation or transmission of vibrations thereof. Background technique [0003] Motor vehicle body structures, components, and propulsion devices are examples of many manufactured items that are subject to mechanical vibrations in their structure. Vibrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/02F16F15/00
CPCB23K20/103Y10T428/12347
Inventor J.G.施罗特托马斯・A・佩里
Owner GM GLOBAL TECH OPERATIONS LLC
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