A cooling water spray component for laser cutting, a spray device and a laser cutting machine

Abstract

The invention discloses a cooling water spraying member for laser cutting. An annular water tank is arranged inside the spraying member, and a plurality of bottom spraying holes communicating with the annular water tank are provided on the lower bottom surface of the spraying member. The inner side wall is provided with a number of side wall spray holes communicating with the annular water tank, and the outer wall of the spray member is provided with a water inlet hole, and the annular water tank is connected with the water inlet hole; the spray member is set on the On the outer periphery of the nozzle of the laser cutting head. The invention also discloses a cooling water spraying device for laser cutting and a laser cutting machine.

Description

technical field [0001] The invention relates to the technical field of laser cutting machinery and equipment, in particular to a cooling water spraying component for laser cutting, a cooling water spraying device for laser cutting and a laser cutting machine. Background technique [0002] Due to the high power and oxygen assistance in the process of cutting thick carbon steel, high-power laser cutting will cause the nozzle of the cutting head to become hot, and the overheating of the plate will affect the quality and stability of the cutting effect; especially the new cutting process Small hole nozzles and full high-power laser cutting can get good processing results, but the nozzles of the cutting head are the easiest to get hot. As long as the nozzles are hot, good processing quality cannot be achieved, and the stability is also poor. [0003] Currently CN208743919U discloses a laser cutting head water cooling protection device, which is arranged on the sensor of the laser...

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Problems solved by technology

[0002] Due to the high power and oxygen assistance in the process of cutting thick carbon steel, high-power laser cutting will cause the nozzle of the cutting head to become hot, and the overheating of the plate will affect the quality and stability of the cutting effect; especially the new cutting process Small hole nozzles and full high-power laser cutting can get good processing results, but the nozzles of the cutting head are the easiest to get hot. As long as the nozzles are hot, good processing quality cannot be achieved, and the stability is also poor.

[0003] Currently CN208743919U discloses a laser cutting head water cooling protection device, which is arranged on the sensor of the laser cutting head, including a first protective cover and a second protective cover; the first protective cover and the second protective cover are detachably fixedly connected together It forms a hollow cylindrical shape, which is used to hug the outer wall of the sensor; the upper ends of the first protective cover and the second protective cover have a fixed connection part for detachable fixed connection and affixed to the sensor; the first protective cover and The interior of the second protective cover is provided with a cooling circulating water channel, and the outer wall is provided with a water inlet and a water outlet connected to the cooling circulating water channel; although the laser cutting head water cooling protection device is provided with the first protective cover and the second protective The covers are detachably and fixedly connected together to form a hollow cylinder tightly on the outer wall of the sensor, and a cooling circulating water channel is provided inside the first protective cover and the second protective cover, so that the sensor of the laser cutting head can be controlled. Cooling, simple structure, easy installation and maintenance; however, the cooling circulating water channel of the laser cutting head water cooling protection device is formed by drilling on the outer surface of the first protective cover and the second protective cover, which leads to the loss of cooling circulating water channel The volume is small, and the cooling effect is reduced; moreover, the laser cutting head water cooling protection device can only cool the sensor of the laser cutting head, but cannot cool the nozzle of the laser cutting head, let alone the plate to be cut

Excessive temperature of the nozzle of the cutting head will affect the sensitivity of the follow-up sensor

[0004] On the other hand, in order to solve this problem, the usual method is to use compressed air to blow directly to the nozzle to dissipate heat through the inside of the cutting head. Since the nozzle aperture is small and the laser power is high, it will not get much heat under the action of auxiliary oxygen during processing. Even if the cooling is good, the compressed air cannot dissipate the temperature of the cutting nozzle and the plate in time. Once the nozzle heats up to about 60°C and the plate is overheated, the cutting quality will be seriously affected. We can only suspend processing or replace the nozzle, because the hot nozzle will also affect the cutting quality. The change of the capacitance value of the capacitive sensor leads to unstable following, which affects the cutting effect

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