The Stability of Laser Cutting

Event Details

The Stability of Laser Cutting

Time: September 23, 2017 at 10pm to September 25, 2017 at 7pm
Location: New York
Street: B15STREET
City/Town: New York City
Website or Map: https://www.htpow.com/high-po…
Phone: 04541516512
Event Type: party
Organized By: michale scot
Latest Activity: Sep 22, 2017

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Event Description

The use of laser cutting machine, a good cutting effect can not be separated from a variety of gas auxiliary, in addition to the purity of auxiliary gas requirements, cutting process for high pressure requirements are also.

In the high power laser cutting process, the auxiliary gas must have sufficient pressure to be able to completely clear the waste residue produced by cutting, usually in the cutting of a thick workpiece when the pressure to reduce a little, stick to the residue on the workpiece will damage the cutting edge.

200mw green laser

Increasing the gas pressure can advance the cutting speed, but after reaching a maximum, continue to increase the gas pressure but will cause the cutting speed to decline. In the case of high auxiliary gas pressure, the reason for the decrease of the cutting speed can be attributed to the enhancement of the cooling effect of the high airflow velocity and the action zone. It may also be the interference of the intermittent shock wave in the airflow to the cooling of the green laser pointers action zone. There is a non-uniform pressure and temperature in the airflow that can cause changes in the airflow field density. Such a density gradient results in a change in the field refractive index, which causes the focus of the beam to focus, resulting in refocusing or beam divergence. This interference can affect the melting efficiency, and sometimes may change the mode structure, resulting in cutting quality degradation, if the beam divergence too much. So that the spot is too large, and even can not be effectively cut the serious consequences.

In the laser cutting process, the laser emitted by the laser is collimated by the cutting head and the focusing lens converges to a point (focus). The operator must ensure that the processed laser beam is at the center of the nozzle and adjust the distance of the nozzle from the surface of the plate Plate thickness), the nozzle at the high-pressure gas jet, with the laser beam to complete the cutting operation.

Cutting the edge of more or less cutting left the lines, the depth of the groove determines the roughness of the cutting surface. The lighter the lines, the lower the roughness, the smoother the surface. In general, the thinner the material thickness, the lower the surface roughness of the cut; the lower the surface roughness than nitrogen cutting with nitrogen or argon. Since the blue laser pointer beam is focused by the presence of the beam and there is a divergence characteristic of the beam, which results in inconsistent spot sizes at different depths in the thickness direction of the material at the time of cutting (especially at the time of cutting of the slab), resulting in a failure of the cutting surface to the surface of the sheet Absolute 90 °, or the upper surface is wider or the lower surface is wider. In general, the thinner the material thickness, the better the vertical; the better the beam quality, the better the verticality. In addition, the relative position of the spot focus and the thickness direction of the material is related to the specific processing.

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