English 
Raw materials for precision metal machining include stainless steel, copper, aluminum, and iron. Lathes, milling machines, drilling machines, polishing machines and other machines can process various parts according to customer drawings or samples, such as screws, motor shafts, model car parts, fishing gear accessories, speaker product shells, mobile power shells, etc.
Precision metalworking processes are based on the production needs of raw materials. After a good start, the production of some small parts, such as punching, and then Gong cutting or CNC machining, can be carried out. This has many aspects in the production of eyewear accessories and auto parts. Making containers: after stamping, burning, welding, sandblasting, oil spraying, and then assembling parts for transportation. For precision hardware fittings, there are many polished surfaces, coated or sprayed with oil. The assembled package is then welded or screwed for delivery.
Steps:
1. Before starting work, all employees should check whether their clothes meet the work requirements. Slippers, high heels and clothes that affect safety are prohibited. Long hair should wear a hard hat. Maintain correct posture at work and have enough energy to handle the work. If you feel uncomfortable, you should leave immediately and report to the leader. In operation, we must concentrate our thoughts, strictly prohibit chatting, and cooperate with each other. Operators must not operate in a state of irritability and fatigue to avoid accidents and ensure safe operation.
2. Before the machine works, check whether the moving parts are full of lubricating oil, then start and check whether the clutch and brake are normal, run for 1-3 minutes. When the machine breaks down, it is forbidden to operate.
3. When changing the mold, please turn off the power first. After the punch moving part stops running, the die can be installed and adjusted. After the installation and adjustment are completed, use the handwheel to test the flywheel twice to check whether the upper and lower molds are symmetrical and reasonable, whether the screws are firm, and whether the blank fixing ring is in a reasonable position.
4. The starting mechanism can only be activated when all other personnel leave the mechanical working area and take away the debris on the workbench.
5. After the machine starts, one person handling will operate the machine. Others are not allowed to press the feet on the power or switch boards, let alone put their hands in the working area of the machine or touch the moving parts of the machine with their hands. When the machine is working, it is forbidden to put your hands into the working area of the slider and take and place the workpiece with your hands. When drawing and placing the workpiece in the mold, standard tools must be used. If abnormal sound or machine failure is found, the power switch should be turned off immediately for inspection.
6. When leaving get off work, the idle power supply should be turned off, and the finished products, materials and sundries on the column should be cleaned to ensure a clean and safe working environment.