Positioning device for online polishing and grinding of titanium roller

The positioning device comprises a second connecting rod, one end of the second connecting rod is connected with a connecting base, the other end of the second connecting rod is connected with a fixing block, the fixing block is connected with a first connecting rod, the other end of the first connecting rod is connected with a rotating assembly, and the rotating assembly is connected with a first rotatable connecting plate. The other end of the first connecting plate is connected with a sensor support fixing block, the upper end of the sensor support fixing block is connected with a sensor support, and a laser distance measuring sensor is arranged on the sensor support. According to the utility model, the center position when the polishing brush swings and the position of the titanium roller can be measured, and the polishing brush and the center of the titanium roller are centered by adjusting the position of the polishing brush, so that the polishing brush can polish and grind the titanium roller more unif