Pre-mixed abrasive water jet intelligent cutting machine

Abstract

The invention discloses a pre-mixed abrasive water jet intelligent cutting machine and belongs to the technical field of abrasive spray devices. The machine comprises a pre-mixed abrasive water jet system, a cutting system and a numerical control system, the pre-mixed abrasive water jet system and the cutting system are in electric connection with the numerical control system respectively, a recovered water tank is arranged below a workbench, the recovered water tank is connected with a screening device, the screening device is connected with an abrasive supply device, the abrasive supply device and a high pressure water generating device are respectively connected with an abrasive tank, a weight sensor is arranged at the bottom of the abrasive tank, a pressure sensor is arranged on a pipeline in front of a nozzle, and a positioning sensor is arranged on a guide rail. An abrasive in the high pressure abrasive tank is fluidized to an abrasive suspension through high pressure water, and a high-speed pre-mixed abrasive water jet is formed through the nozzle to transit pressure energy to kinetic energy, so the precise cutting of a material is completed under the control of the intelligent numerical control system, and the used abrasive can be recycled.

Description

technical field [0001] The invention relates to a pre-mixed abrasive water jet intelligent cutting machine, which belongs to the technical field of abrasive jetting devices. Background technique [0002] Abrasive water jet technology was developed on the basis of pure water jet processing technology in the 1980s. The addition of abrasives has greatly improved the cutting ability of traditional water jets. Abrasive water jet cutting machines have become a powerful cutting tool. The cutting ability of the pre-mixed abrasive waterjet is several times that of the post-mixed abrasive waterjet due to the adoption of a more reasonable abrasive mixing method. So far, the research on pre-mixed abrasive water jet technology is limited to the feeding system, and the problem of continuous automatic feeding of pre-mixed abrasive water jet has been difficult to overcome. [0003] On the other hand, without the assistance of the CNC system, the abrasive water jet can only complete the cut...

AI Technical Summary

Problems solved by technology

So far, the research on the pre-mixed abrasive water jet technology is limited to the feeding system, and the continuous automatic feeding problem of the pre-mixed abrasive water jet has been difficult to overcome

However, there is no intelligent cutting machine that combines the CNC system with the pre-mixed abrasive water jet. At present, the CNC water jet cutting machine is in the form of post-mixing. The principle is that high-pressure water is injected through the first nozzle to form a high-speed water jet. A certain degree of vacuum is generated in the mixing chamber so that the abrasive is sucked into the mixing chamber and undergoes violent turbulent diffusion and mixing with the high-speed water jet, and then is injected through the second nozzle to form an abrasive water jet.

Since the abrasive particles of the post-mixed abrasive water jet are added after the jet is formed, the abrasive contacts with the high-speed water jet at a very low initial velocity, so it is difficult to get fully mixed, and the abrasive particles cannot be fully accelerated, which significantly reduces the energy. transmission efficiency, so post-mix abrasive waterjet cutting requires high working pressure

Secondly, the abrasives of the post-mixed abrasive water jet cutting machine cannot be recycled directly, resulting in a large consumption of abrasives

Finally, air is brought in during the mixing of water and sand, which increases the diameter of the jet and significantly reduces the cutting quality

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