Laser drilling method

A laser drilling and laser technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of difficult discharge of slag, increased control cost, and poor drilling quality, so as to prolong life and increase evaporation rate, the effect of increasing the drilling rate

Inactive Publication Date: 2013-04-24
WENZHOU UNIVERSITY +3
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Problems solved by technology

[0003] However, the existing laser drilling method has the following disadvantages: 1. It is difficult to discharge the slag when using a laser to drill a large-diameter hole; 2. A lot of molten sputtering on the surface of the hole after processing affects the quality of the hole; 3. Use a long pulse laser The drilling quality is not good when drilling, and it is not easy to drill through, and the laser pulse must be shortened to increase the control cost

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  • Laser drilling method

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Embodiment Construction

[0020] The following examples serve to illustrate the invention, but do not limit it. The details of the method proposed by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] The invention provides a laser drilling method, such as figure 1 As shown, the spray head 3 is fixed above the workpiece 2 at a certain angle; the laser drill 4 is aligned with the position on the workpiece 2 that needs to be drilled, the spray head 3 should keep a certain distance from the laser drill 4 and the airflow emitted by the spray head 3 Or the liquid should not be directly facing the drilling position; turn on the pressurization device 1, the spray head 3 sprays gas or liquid to form a high-speed fluid layer 6 on the surface of the workpiece 2, and the fluid flow direction of the high-speed fluid layer 6 is parallel to the surface of the workpiece; then start the laser to emit The laser beam 5 drills holes on the surface of the workp...

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Abstract

The invention provides a laser drilling method. The laser drilling method includes steps of (1), enabling a supercharging device to spray high-pressure gas or liquid to the surface of a workpiece to be drilled and forming a high-speed fluid layer on the surface of the workpiece; and (2), starting a laser device to emit laser beams to drill a hole on the surface of the workpiece. The flowing direction of fluid of the high-speed fluid layer is parallel to the surface of the workpiece. The laser drilling method has the advantages that the pressure on the surface of the machined hole is reduced by the high-speed fluid, so that molten materials in the machined hole and steam of the materials are quickly discharged; a plasma shielding effect is relieved by the high-speed fluid, accordingly, the laser drilling machining speed is increased, and the laser drilling machining quality is improved; and long-pulse laser can be used for drilling operation owing to the high-speed fluid layer, and the control cost is lowered.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a method for assisting drilling with high-speed fluid during the laser drilling process. Background technique [0002] Laser drilling is the earliest practical laser processing technology, and it is also one of the main application fields of laser processing. With the rapid development of modern industry and science and technology, more and more materials with high hardness and high melting point are used, but the traditional processing methods can no longer meet some process requirements. For example, processing micron-scale holes on high-melting-point metal molybdenum plates; processing tens of micron small holes on hard tungsten carbide; Silk head and so on. This type of processing task is very difficult, sometimes even impossible, with conventional machining methods, but it is not difficult to achieve with laser drilling. The laser beam is highly concentrated in space and t...

Claims

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Application Information

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IPC IPC(8): B23K26/14B23K26/16
Inventor 冯爱新卢轶薛伟田良谢华锟顾永玉
Owner WENZHOU UNIVERSITY
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