A method of grind hardening a workpiece is provided. The method may include securing the workpiece in a workpiece retainer and a grind tool in a tool retainer, rotating the grind tool in a first angular direction at a first angular speed, controlling the workpiece and tool retainers such that the grind tool engages the workpiece, and controlling the workpiece and tool retainers such that the grind tool is guided along a grinding track of the workpiece. The grind tool may engage and/or disengage the workpiece at portions of sacrificial material disposed thereon. Coolant and cleaning nozzles may be provided and controlled such that at least a portion of the coolant from the coolant nozzle is diverted to the cleaning nozzle in a manner which reduces heat dissipation, improves thermal efficiency of the grind hardening and reduces loading of the grind tool.

The present disclosure relates to the technical field of mills, and discloses a mill transmission device. In the mill transmission device, an output end of a motor is provided with a cross column that is the same as that at a top of a connecting shaft rod, and the cross column at the output end of the motor is inserted into a first connection port A, which drives a shaft tube to rotate. A rubber ring A embedded in the first connection port A is capable of reducing vibration and noise caused by rotation. Similarly, the shaft tube is detachably connected to the connecting shaft rod through a second connection port B and a rubber ring B, and the rubber ring B is also capable of reducing the noise and vibration caused by rotation of the shaft tube.

The present disclosure relates to the technical field of mills, and discloses a mill transmission device. In the mill transmission device, an output end of a motor is provided with a cross column that is the same as that at a top of a connecting shaft rod, and the cross column at the output end of the motor is inserted into a first connection port A, which drives a shaft tube to rotate. A rubber ring A embedded in the first connection port A is capable of reducing vibration and noise caused by rotation. Similarly, the shaft tube is detachably connected to the connecting shaft rod through a second connection port B and a rubber ring B, and the rubber ring B is also capable of reducing the noise and vibration caused by rotation of the shaft tube.