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Pre-process stress loading of components for post-process warp control

A warpage stress and prestress technology, applied in the field of pretreatment stress loading of components for post-processing warpage control

Inactive Publication Date: 2014-02-05
ELECTRO SCI IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This hot material removal process results in heat affected and molten zones in the machined part

Method used

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  • Pre-process stress loading of components for post-process warp control
  • Pre-process stress loading of components for post-process warp control
  • Pre-process stress loading of components for post-process warp control

Examples

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Embodiment Construction

[0026] figure 1 Relevant parts of an apparatus 10 for machining a part 12 with a long wavelength laser 14 producing a beam 15 suitable for machining the part 12 are shown. As will be explained herein, the apparatus 10 and associated methods according to embodiments of the present invention are most generally directed at counteracting the warping effect due to the Machined part 12 results.

[0027] The component 12 may comprise or be in the form of a thin slab, and a long wavelength laser 14 is utilized to cut one or more apertures 18 through the component 12 . The aperture 18 extends from the upper face to the lower face of the component 12 such that the aperture 18 extends generally perpendicular to the plane defined by the component 12 .

[0028] Apparatus 10 includes a fixture 16 that positions part 12 relative to long wavelength laser 14 when long wavelength laser 14 is utilized to cut one or more features into or through part 12. Holds in predetermined position and co...

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PUM

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Abstract

A process and apparatus neutralizes a warp effect resulting from a build up of micro strains caused by machining a part with a long wavelength laser. The part to be machined is pre-stressed in an opposite direction of a warp stress due to machining using a fixture for holding the part without yielding any other features in the part. The part is machined while held in the pre-stressed position in the fixture.

Description

[0001] Related Application Cross Reference [0002] This application claims priority to US Provisional Patent Application No. 61 / 073,644, filed June 18, 2008, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to an apparatus and process technology to counteract the warping effects caused by the build-up of micro-stresses caused by machining components with long wavelength lasers. Background technique [0004] When machining components with long wavelength lasers, most of the machining process is thermal. This hot material removal process results in heat affected zones and molten zones in the machined component. During the cutting process, the molten zone expands and turns into a liquid state. The heat affected zone also expands and rises in temperature where the metal is locally annealed. Shortly after the laser has machined the metal region, the heat affected zone and the molten zone cool and shrink in volu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/09C21D7/13C21D9/00
CPCB23K26/421B23K26/10B23K26/422B23K2203/10B23K26/60B23K26/702B23K2103/10Y10T29/49863B23K26/38B23K37/04B23K26/70
Inventor 马克·T·科斯莫夫斯基穆罕默德·E·阿尔帕伊
Owner ELECTRO SCI IND INC