GRINDING ROLLER COMPRISING HARD BODIES EMBEDDED IN SURFACE Russian patent published in 2016 - IPC B02C4/30 

FIELD: machine building.

SUBSTANCE: invention relates grinding roller comprising hard bodies embedded therein and methods of removing hard bodies from roller. Grinding roller comprises hard bodies arranged on its surface by bushings. Material of sleeve has a melting point not higher than 400°C or has a standard chemical potential, which is more negative in relation to potential of surface of grinding roller. Method for removal of hard bodies according to first version consists in that, first, tool is welded to bushing, then bushing is removed together with or without hard body, if hard body is in a grinding roller, it is removed after removal of bushing. According to second version, method for removal of hard bodies installed by means of bushings with melting point not higher than 400 °C, consists in that first, surface of grinding roller is heated to melting point of bushing, and hard bodies are then removed. According to third version, method for removal of hard bodies installed by means of bushings having standard chemical potential, which is lower,that is more negative in relation to potential of surface consists in that, first, grinding roller is immersed into electrolyte solution, then it is connected to source of electric voltage, wherein grinding roller is connected to anode, and counter electrode - to cathode of same voltage source, followed by anodic oxidation of bushing in electrolyte solution.

EFFECT: device and methods enable to reduce costs for replacement of hard bodies.

8 cl, 7 dwg