Femtosecond laser nicking method for diaphragm
A technology of femtosecond laser and femtosecond laser, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of poor reliability of diaphragm, false explosion, and poor uniformity of scoring depth, etc., and achieve deep processing Controllable, improved uniformity, increased burst pressure, and flow consistency
Inactive Publication Date: 2021-03-16
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0003] The purpose of the present invention is to solve the problem that the notch depth uniformity of the existing diaphragm is not good, which leads to poor reliability of the diaphragm and easy to cause false explosion, and provides a femtosecond laser notch method for the diaphragm
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[0026] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.
[0027] The invention provides a diaphragm femtosecond laser scoring method, through which the groove depth uniformity of the existing diaphragm notch can be greatly improved, and the rupture pressure and flow consistency of the diaphragm valve can be improved. The success rate of rocket launches is of great significance. Due to the milling stress in the existing mechanical processing method, the parts are easily deformed during the diaphragm scoring process, resulting in inconsistent groove depths. Compared with the traditional mechanical processing method, the method of the present ...
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Abstract
The invention provides a femtosecond laser nicking method for a diaphragm, and solves the problems that the nicking depth uniformity of an existing diaphragm is poor, so that the reliability of the diaphragm is poor, and mistaken explosion is easily caused. The method comprises the following steps of step 1, setting parameters of a femtosecond laser, and setting a scanning speed of a scanning galvanometer; step 2, equally dividing the cross section of a nick groove into n layers to obtain n nick patterns; step 3, importing the n nick patterns obtained in the step 2 into a control system of thescanning galvanometer; step 4, clamping the diaphragm; step 5, starting the femtosecond laser, sequentially scanning the n nick patterns imported in the step 3 by the scanning galvanometer, and carrying out scanning machining; and step 6, finishing the processing of the nick grooves of the diaphragm until the imported n nick patterns are processed completely. According to the method, the uniformity of the depth of the nick grooves of the diaphragm and the reliability of the working performance of a diaphragm valve are improved, and then the consistency of the rupture pressure and the flow ofthe diaphragm valve is improved.
Description
technical field [0001] The invention belongs to the field of laser precision manufacturing, and in particular relates to a diaphragm femtosecond laser marking method. Background technique [0002] Diaphragm valves are typically installed in propellant storage units to isolate propellant. When the liquid rocket engine is working, it passes through the notch groove on the surface of the diaphragm valve (the typical diaphragm notch shape is as figure 1 (shown) under a certain pressure of the propellant to achieve rupture, so that the propellant can pass through smoothly and achieve ignition. Therefore, the uniformity of the notch depth of the diaphragm valve is of great significance to whether the rocket engine can be successfully ignited. However, at present, mechanical processing is usually used to score the diaphragm. The uniformity of the depth of the notch obtained by this processing method is not good, resulting in poor reliability of the diaphragm and easy to cause fals...
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IPC IPC(8): B23K26/364B23K26/402
CPCB23K26/402B23K26/364
Inventor 李明江浩
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI