Preparation and high-efficiency precision grinding method of a brazed abrasive tool with multi-grain size and multi-form abrasive grains

Abstract

The invention discloses a preparation and high-efficiency precision grinding method of a brazed abrasive tool with multi-grain size and multi-form abrasive grains. Firstly, large-grain irregular abrasive grains and fine-grain regular abrasive grains are mixed, and then mixed with active solder powder, forming agent, etc. The feed material is prepared by uniform mixing; brazed abrasives with multi-grain size and multi-form abrasive grains are prepared by molding and vacuum brazing technology, and they are trimmed by online electrolytic dressing technology to form a layer of uniform, Dense and thin oxide film. During the grinding process, large irregular abrasive grains are firmly held in the solder matrix and continuously broken to form micro-cutting edges to cut the workpiece; while fine-grained regular abrasive grains are evenly dispersed and accommodated in the oxide film generated by electrolysis. Play the role of grinding and polishing, and eliminate the scratch and crack layer formed by irregular large-grained abrasive grains on the surface of the workpiece. The synergistic effect of multi-size and multi-morphic abrasive particles realizes the integration of grinding and polishing, and obtains high-efficiency and low-damage processed surface quality.

Description

technical field [0001] The invention relates to the preparation and processing technology of novel tools in the field of advanced manufacturing, in particular to the preparation and high-efficiency precision grinding method of a brazing abrasive tool with multi-grain size and multi-form abrasive grains. Background technique [0002] The bonded abrasive grinding wheel and electroplated grinding wheel manufactured by the traditional process have a limited height of the abrasive grain, and the grinding wheel is easy to block and cause thermal damage during grinding; and these two types of grinding wheels have low abrasive grain holding strength, and the abrasive grain is easy to grind during the grinding process. The lack of premature shedding will affect the quality of the grinding surface and the service life of the workpiece. In order to overcome the above shortcomings of traditional grinding wheels, relevant scholars have developed a single-layer brazed superhard abrasive w...

AI Technical Summary

Problems solved by technology

Especially for regular large-grained abrasive grains, the breakage rate is low, and when the abrasive grains are flattened and lose their cutting ability, there are still large particle sizes remaining. The scratching and cutting action on the surface is more obvious, resulting in a reduction in the quality of the machined surface

At present, the commonly used grinding wheels for electrolytic dressing have very small particle sizes (usually micron or submicron). Although the fine-grained regular abrasive wheels can obtain good surface quality, the processing efficiency is low and the abrasive loss is low. larger

Through the above analysis, it can be seen that it is difficult for the grinding wheel prepared by the traditional process to truly achieve the unity of high efficiency and low damage processing.

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