A laser drilling device and method for improving hole taper and inner wall quality

Abstract

The invention discloses a laser perforating device capable of improving the conical degree and the inner wall quality of a hole, and a method. According to the method of the laser perforating device, a workpiece is subjected to primary laser perforating and then rotates 180 degrees in the x direction of the hole through a rotatable clamp, so that the workpiece is just soaked into water, x and y coordinates of the small hole are not changed, and then secondary laser perforating is conducted through a laser-induced cavitation technology; and in addition, the laser perforating device capable of improving the conical degree and the inner wall quality of the hole is designed and comprises a power box, an uncovered cuboid container, a laser head, a laser guide pipe, a CCD camera, a laser device, a z-direction moving mechanism, a fixing clamp device, an x-y moving platform and a rotatable clamp device. According to the laser perforating device and the method thereof, the mode of conducting laser perforating in air and the mode of conducting laser perforating in water are coupled, secondary perforating is completed by turning over the workpiece so that the conical degree of the hole can be improved, the laser perforating technology and the laser-induced cavitation technology are combined in the secondary perforating process, and the inner wall of the hole is strengthened by impact waves generated through cavitation.

Description

technical field [0001] The invention relates to the technical field of laser drilling, in particular to a laser drilling device and method for improving hole taper and inner wall quality. Background technique [0002] At present, laser drilling technology has been applied to many industries such as automobile industry, shipbuilding, aerospace, instrumentation and medical technology. Compared with traditional mechanical drilling methods, laser drilling technology has the advantages of high precision, fast speed, high efficiency, good economic benefits, no tool loss, and large depth-to-diameter ratio. It has become one of the main application fields of laser processing. Laser-induced cavitation technology uses a lens to focus the laser light into the water. When the water is ionized, a plasma cavity will be formed. The plasma continues to absorb laser energy strongly, and the cavity expands rapidly to form cavitation bubbles. The collapse of the cavitation bubbles produces a s...

AI Technical Summary

Problems solved by technology

However, the proportion of the chemical solution is only for aluminum alloy, and other materials need to mix the chemical solution, which is troublesome and the corrosion process takes time. In addition, the chemical reaction process is to corrode all parts of the inner wall of the hole, not just corroding the excess aluminum in the hole. Alloy material, so taper improvement may not be noticeable

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