Ultrasound-assisted vaporization cooling double-circle grinding system with improved fog gun

Abstract

The invention discloses an ultrasound-assisted vaporization cooling double-circle grinding system with an improved fog gun. The ultrasound-assisted vaporization cooling double-circle grinding system comprises a grinding wheel and a roller, wherein the roller is externally tangent to the grinding wheel. A case is arranged at one side of a grinding wheel support. A double-rod support is vertically arranged at the top of the case. A fog gun barrel is mounted at the top end of the double-rod support through a rotating shaft. A jet flow annular pipe net and an atomization annular pipe net are fixedto the front end of the fog gun barrel. The bottom end of the jet flow annular pipe net is connected to a metering pump through a liquid supply pipe. The bottom end of the atomization annular pipe net is connected to the case through a fog supply pipe. An electric control cabinet is arranged at one side of the case. The flow speeds of the jet flow annular pipe net and the atomization annular pipenet and the rotating speeds of a hub and a fan blade assembly are adjusted, the ratios of jet flow liquid drops to atomization liquid drops and air are changed, and meanwhile, the rate that jetting is conducted toward a grinding area in an integrally-columnar form is changed; axial ultrasonic vibration and longitudinal ultrasonic vibration are added to assist in the grinding process, and the Leidenfrost effect is reduced; and the grinding cooling effect is enhanced, and the grinding surface quality is improved.

Description

technical field [0001] The invention belongs to the technical field of precision grinding, and relates to an ultrasonic-assisted vaporization cooling double-circle grinding system with an improved fog cannon. Background technique [0002] The slow-feed grinding wheel has a long contact arc with the workpiece. At the same time, there are many abrasive particles, and each abrasive particle is a cutting edge. The grinding contact arc is long, and the grinding debris is filamentous. The surface after cutting is not easy to produce cracks, vibration marks and other defects, and the corresponding metal generates a lot of heat in the process of tearing and deformation, and can even melt the grinding debris to form welding beads and burn the surface of the part. Therefore, slow feed grinding should be equipped with strong cooling. [0003] Boiling heat transfer mechanism in slow-feed grinding arc area: boiling has four stages, natural convection area, nucleate boiling area, transit...

AI Technical Summary

Problems solved by technology

However, in the prior art, it has been applied in the cutting process, but it has not been popularized in the grinding process. The MQL in the prior art has the characteristics of a positive correlation between the atomization particle size and the injection pressure, and it is impossible to separate the two for further processing. separate control

[0005] In the prior art, the grinding fluid is usually used to cool down by fluid infiltration. With the development of grinding technology, nano-fluid lubrication technology, jet liquid supply method, through-flow liquid supply method, spray cooling method, etc. have appeared. In advanced manufacturing technology, the research hotspot is the slow-feed grinding method. The disadvantage of this grinding method is that the heat dissipation is poor, and it is easy to cause burns in the grinding arc area. The difficulty of the grinding method is that the grinding arc area is long, not only the heat generated by grinding is high, but also at the entrance of the grinding arc area, due to the Leidenfrost effect, the vapor film blocks other grinding fluids from entering the grinding arc area At present, researchers generally use the method of increasing the injection force to forcibly break the steam film

Chinese patent CN201711278067.1 discloses a nanofluid micro-lubrication grinding device with ultrasonic vibration-assisted grinding fluid microchannel infiltration. Compared with similar ultrasonic-assisted grinding devices, the ultrasonic vibration mechanism that can adjust the spatial position of the ultrasonic vibrator is improved, but only from The form of ultrasonic has been modified, but in essence it still belongs to the category of ultrasonic vibration loaded into the grinding area, and there is still no improvement and research on the boiling and vaporization of grinding fluid.

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