Focusing adjusting device and method for online punching for thin rod objects

Abstract

The invention discloses a focusing adjusting device for online punching for thin rod objects. The focusing adjusting device comprises a laser light source, a light beam shaping device, a light path transmission device and a light path focusing device, wherein the laser light source is used for outputting laser; the light beam shaping device is arranged in a laser light path and used for adjustinga laser beam into light with approximately uniform energy distribution; the light path transmission device is arranged in an emitting light path of the laser light source and used for transmitting thelaser to a preset spatial position direction; and the light path focusing device is arranged in an output light path of the light path transmission device and used for converging and irradiating thelaser to the surface of a product. The problem of non-uniform energy distribution of common laser is solved through light beam shaping, and one-to-one correspondence between the aperture and the focallength and between the hole depth and the laser energy is established; and on the other hand, an energy threshold value to be punched is obtained through a large amount of experimental data, and thesubsequent production punching work is assisted through the accurate threshold value.

Description

Technical field: [0001] The invention belongs to the technical field of laser beam forming, and in particular relates to a focus adjustment device and method for drilling holes on an online thin rod object. Background technique: [0002] Generally, thin rod objects of non-metallic materials are punched. In terms of drilling efficiency and punching effect, pulsed CO2 lasers are still used at present to focus the pulsed laser beams emitted by them to form holes on the surface of thin rod objects. . [0003] However, since the energy distribution in the CO2 laser output beam is a Gaussian distribution, such as figure 2 As shown, the laser energy density at the center of the beam is much greater than the energy density at the edge of the beam. The focused spot formed by the Gaussian distribution of the laser after being focused by the lens also has similar distribution characteristics. During the precision perforation process, it often forms A hole is formed in the center of t...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that in such a use state, adjusting the focus adjustment device and adjusting the size of the laser energy will cause changes in the diameter of the hole, that is, the diameter of the hole is not only related to the focus adjustment device, but also related to the size of the laser energy. The correlation of the increases the adjustment difficulty

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