Grinding wheel dressing method capable of automatically adjusting discharge voltage

Abstract

The invention discloses a grinding wheel dressing method capable of automatically adjusting discharge voltage. The grinding wheel dressing method comprises the following steps: selecting a corresponding dressing mold according to a grinding wheel dressing requirement, mounting a grinding wheel to be dressed and the dressing mold, inputting characteristic parameters of the grinding wheel to be dressed, calling a corresponding preset current data set according to the characteristic parameters of the grinding wheel to be dressed, and selecting the rotating speed of the grinding wheel to be dressed; calling a corresponding fixed current value At in a preset current data set according to the selected rotating speed, finally, conducting power-on grinding, controlling the discharge voltage between the to-be-repaired grinding wheel and the dressing mold in a closed-loop mode, and enabling the discharge current Ai between the to-be-repaired grinding wheel and the dressing mold to be kept balanced. The discharge voltage can be adjusted online in real time, discharge current balance is guaranteed, the rotating speed of the grinding wheel meets the machining requirement and is stable and reliable, and the stability and reliability of the whole dressing machining process are improved.

Description

technical field [0001] The invention belongs to the technical field of grinding processing equipment, and in particular relates to a grinding wheel sharpening method for automatically adjusting discharge voltage. Background technique [0002] ELID online electrolytic dressing technology is a dressing method specially applied to metal bonded grinding wheels. Its working principle is: the grinding wheel is connected to the positive electrode of the power supply through a brush, and a negative electrode with good conductivity is manufactured according to the shape of the grinding wheel, and the electrode and the surface of the grinding wheel There is a certain gap between them. After the grinding fluid with electrolysis is sprayed from the nozzle and enters the gap between the two, under the action of current, the metal matrix of the grinding wheel is electrolyzed as an anode, so that the abrasive grains in the grinding wheel are exposed. surface, forming a certain cutting heig...

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Problems solved by technology

[0003] During the grinding process, an oxide film is gradually formed on the surface of the anode grinding wheel, and the formation of the oxide film causes a decrease in the conductivity between the grinding wheel and the mold

However, in order to improve the working efficiency of sharpening, it is necessary to increase the speed of the grinding wheel to a predetermined speed range, and the thickness of the passivation film will also increase when the speed increases, which will lead to a decrease in the electrical conductivity between the two, resulting in The speed cannot meet the established requirements, which will affect the sharpening efficiency and machining precision

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