Supply system for sub-cooling and nano particle jet flow minimal quantity lubrication coupled grinding medium

Abstract

The invention relates to a supply system for a sub-cooling and nano particle jet flow minimal quantity lubrication coupled grinding medium. The supply system comprises at least one minimal quantity lubrication and sub-cooling jet nozzle combined unit which is arranged on the side of a grinding wheel guard of a grinding wheel and is matched with a workpiece on a workbench. Each minimal quantity lubrication and sub-cooling jet nozzle combined unit comprises a minimal quantity lubrication atomization minimal jet nozzle and a sub-cooling jet nozzle, wherein the minimal quantity lubrication atomization minimal jet nozzle is connected with a nano fluid pipeline and a compressed air pipeline, and the sub-cooling jet nozzle is connected with a sub-cooling fluid pipeline; the nano fluid pipe, the compressed air pipeline and the sub-cooling liquid pipeline of each unit are connected with a nano fluid supply system, a low-temperature medium supply system and a compressed air supply system through control valves; and the nano fluid supply system, the low-temperature medium supply system and the compressed air supply system are connected with a control device. By means of the supply system, grinding burn is effectively eliminated, the surface quality of workpieces is improved, and efficient low-consumption environment-friendly energy-saving low-carbon clean production is achieved.

Description

technical field [0001] The invention relates to a grinding medium supply system in the field of grinding processing, in particular to a grinding medium supply system coupled with low-temperature cooling and nano particle jet microlubrication. Background technique [0002] Due to the high grinding force and specific grinding energy, the grinding process generates a lot of heat in the grinding area. Since the metal layer to be cut is relatively thin, about 60%-90% of the heat is transferred to the workpiece, and only less than 10% of the heat is taken away by the grinding debris. The heat introduced into the workpiece is often too late to be transmitted to the depth of the workpiece during the grinding process, and it gathers in the surface layer to form a local high temperature. The surface temperature of the workpiece can often reach above 1000 °C. The layer forms a huge temperature gradient (up to 600-1000°C / mm). Therefore, the thermal effect of grinding has a great influe...

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Problems solved by technology

From the literature search, it can be seen that there is no organic combination of nano-particle jet micro-lubrication grinding and low-temperature cooling grinding, and the internal relationship between convective enhanced heat transfer in the grinding area and nano-particle jet and low-temperature cooling medium has not been established. The formation mechanism of the oil film on the surface of the workpiece under the coupling condition of the nanoparticle jet and the low-temperature cooling medium has not been established, and the advantages of the lubrication and heat dissipation of the nanoparticle jet and the low-temperature cooling medium on the grinding wheel / workpiece interface cannot be brought into play

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