Automatic chuck apparatus, grinding wheel cutting apparatus and cutting method

A rod workpiece cutting method for cutting a rod workpiece with a grinding wheel cutting apparatus:

• wherein the grinding wheel cutting apparatus comprises an automatic chuck apparatus, and is configured to clamp the rod workpiece by the automatic chuck apparatus to cut the rod workpiece;
• wherein the automatic chuck apparatus comprises a mechanical chuck, a mechanical chuck mounting bracket, a hydraulic motor, a lifting mechanism, a chuck key and a lifting cylinder;
• the mechanical chuck is mounted above the mechanical chuck mounting bracket, and the hydraulic motor, the lifting mechanism and the lifting cylinder are mounted below the mechanical chuck mounting bracket;
• the hydraulic motor is configured to drive the chuck key to rotate, the lifting cylinder is configured to drive the chuck key to ascend or descend through the lifting mechanism, thereby the mechanical chuck is locked or loosened by the chuck key;
• the grinding wheel cutting apparatus further comprises a first laser distance sensor, a master controller, and a grinding wheel, wherein the first laser distance sensor is communicatively coupled to the master controller;
• the method comprises:
• determining a material density of a to-be-cut rod workpiece and a segment weight according to a user instruction;
• obtaining, by the first laser distance sensor, an outer diameter of the rod workpiece;
• transmitting, by the master controller, the outer diameter of the rod workpiece to the external device;
• determining, by the external device, a segment length based on the outer diameter, the material density of the rod workpiece and the segment weight;
• receiving, by the master controller, a segment length of a segment to be cut off from the rod workpiece;
• and
• circularly cutting, by the grinding wheel and controlled by the master controller, the rod workpiece according to the segment length and a preset reserved core diameter.