1. Preparation: Fix the workpiece on the workbench, and adjust the position and angle of the workpiece to make it perpendicular to the milling direction of the 80-cutter head.

2. Adjust the tool height: install 80 cutter heads on the milling machine, and adjust the tool height to make it contact with the workpiece surface.

3. Start milling: start the milling machine and move the cutter head 80 degrees along the edge of the workpiece for milling. In the process of milling, it is necessary to keep the contact between the cutter and the workpiece surface, control the milling depth and speed, and avoid the cutter damage or workpiece damage.

4. Finishing milling: After milling is completed, turn off the milling machine, take down 80 cutter heads, and clean the workbench and cutters.