Picosecond laser etching processing method for omega-shaped nick of metal diaphragm
A technology of metal diaphragm and picosecond laser, which is applied in the direction of metal processing equipment, laser welding equipment, manufacturing tools, etc., can solve the problems of inability to realize irregular-shaped notch processing, low processing accuracy and efficiency, and achieve improved accuracy and Effects of processing efficiency, defect rate reduction, and precision improvement
Pending Publication Date: 2021-12-31
XIAN AEROSPACE PROPULSION INST
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Problems solved by technology
[0006] The purpose of the present invention is to provide a picosecond laser etching processing method for metal diaphragm Ω-shaped notches, which mainly solves the problem that the traditional laser etching path design method cannot realize the processing of irregular-shaped notches and the filling of grid point sets The laser etching path leads to the problem of low processing accuracy and efficiency
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[0039] The picosecond laser etching processing method of a metal diaphragm Ω-shaped notch proposed by the present invention will be described in detail below in conjunction with the accompanying drawings and various embodiments. It should be noted that: the accompanying drawings are in simplified form and use inaccurate The proportions are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.
[0040] A kind of picosecond laser etching processing method of metal diaphragm Ω-shaped notch of the present invention, comprises the following steps:
[0041] Step 1, according to the pattern of the Ω-shaped notch on the metal diaphragm (such as figure 1 shown), to split and restore the regular graph, the irregular graph Ω can be split into an arc segment and two straight line segments, and the split arc segment can be restored to a circle.
[0042] Specifically: an irregular Ω graph can be split into upper arc C1, lowe...
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Abstract
The invention provides a picosecond laser etching processing method for an omega-shaped nick of a metal diaphragm. The picosecond laser etching processing method mainly solves the problems that irregular-shaped nicks cannot be processed by a traditional laser etching path design method, and the processing efficiency is low due to the fact that a laser etching path is filled with a grid point set. The method comprises the following steps: firstly, carrying out regular graph splitting and reduction on an omega-shaped nick pattern, secondly, generating an omega-shaped nick point cluster by adopting point set drawing software, designing an omega-shaped nick path based on the point cluster, and carrying out preliminary drawing; processing omega-shaped nicks by using a picosecond laser processing technology again; and finally, carrying out the picosecond laser etching processing of the omega-shaped nick of the metal diaphragm after the appearing defects are corrected. The design method provided by the invention can be used for picosecond laser processing of the omega-shaped nick metal diaphragm which is large in size, any in nick depth and any in material, so that the metal diaphragm with the omega-shaped nick is applied to a liquid rocket engine diaphragm valve.
Description
technical field [0001] The invention relates to a picosecond laser processing method of a metal strip or foil, in particular to a picosecond laser etching processing method of an Ω-shaped notch on a metal diaphragm. Background technique [0002] The metal diaphragm with Ω-shaped notch is a blind groove with an Ω-shaped shape and a certain depth processed on the metal strip or plate, and welded to match the diaphragm valve of the liquid rocket engine. The diaphragm valve is an important part to ensure the reliable operation of the liquid rocket engine. When the propellant is filled and stored, the diaphragm valve is normally closed to isolate the propellant from the engine cavity; when the engine is working, the diaphragm valve is in a certain state. Under the action of positive pressure difference, it ruptures and opens at the Ω-shaped notch. [0003] The picosecond laser etching process can realize the processing of the metal diaphragm score and guarantee the performance r...
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IPC IPC(8): B23K26/362
CPCB23K26/362
Inventor 杨祎常涛解庆刘伟张春红张亮张玻溶
Owner XIAN AEROSPACE PROPULSION INST