First, the benchmark overlap principle. The design scheme benchmark should be selected as accurate positioning benchmark as much as possible. Hardware manufacturers should pay more attention to this principle to ensure accuracy, especially at the end. In this way, it can also prevent position deviation benchmark errors;

Second, the principle of unified benchmark. The various surfaces of the benchmark surface should be selected uniformly and accurately. The processing of small hardware should be possible to ensure the position accuracy between the surface as much as possible; sometimes we also follow the principles of the same benchmark and continue;

Third, the principle of self -centered. The processing capabilities of some small machines and the unified process of the entire precision processing process ensure the quality and production efficiency of processing, and the high -precision processing surface itself is a basic level.

1. The front surface of the hole

For parts, brackets, crankshafts and other parts, the plane should be processed first, and then the hole is processed. In this way, the holes can be accurately located on the plane to ensure the accuracy of the plane and the position of the hole, and facilitate processing holes on the plane.

2. First of all, process the benchmark surface

During the entire process of parts processing, the surface of the hardware non -standard parts processed as precise positioning benchmarks should be first processed in order to provide precision benchmark for the processing of subsequent processes as soon as possible. It is called "benchmark priority".

3. Surface treatment

Experience (such as grinding, honing, fine polishing processing, etc.) on the surface should be carried out at the end of the processing process line. The smooth surface after processing is above RA0.9UM. Minor impact will damage the surface. In Japan, Germany and other countries, after finishing, velvet cloth needs to be maintained. It is absolutely prohibited from directly contacting product workpieces by hand or other objects to prevent damage caused by transportation and installation between the surface of the precision processing and process.

Hardware processing precision hardware processing

1. Before the mechanical operation, check whether the fitness part is full of oil, then open and check whether the clutch and braking system are normal, and operate the machine for 1-3 minutes. If a common mechanical failure occurs, operation is prohibited.

2. Ensure that the work attitude is reasonable and has enough ideas to solve the problem. If you find that you are unwell, you should get off work immediately and report to your superiors. We must be committed to operations and prohibit each other's exchanges and cooperation. The operator shall not operate in a state of restlessness to prevent safety accidents and ensure safety operations. All employees of the hardware processing plant should check whether the clothes and pants meet the work requirements before entering the job. There is no need to wear sandals, high heels, clothes and pants that hinder safety, nor do they have to wear long hats and safety helmets.

3. When the hardware processing plant is named and changed the abrasive, first cut off the power, then press and hold the mobile unit to stop the operation, and then gradually install and adjust the mold housing. After the installation is adjusted, manually move the water pump flywheel to check whether the left and right mold shells are symmetrical, whether the screw is firm, and whether the pressure ring is in a valid position.

4. Before the hardware processing plant starts to operate the machine switching power supply, it is necessary to wait for other workers to leave the machine work area and take out the slag on the workbench.

5. When working on the machine, it is forbidden to reach into the working area of the roller. It is forbidden to put product workpieces by hand. When placed in an integrated IC, you must use a special tool that meets the requirements. If you find that the sound of the machine is abnormal or there is a common failure of the machine, please turn off the switch immediately for inspection. After the machine is running, one person should be transported and operated mechanically. Others shall not press the electrical building or button to switch the board, nor can it touch the working area of the machine or touch the machine's mobile parts with the palm of the hand.

6. After the work is over, the power should be cut off, and the dirt on the finished products, raw materials and edges should be distributed on the stigma to ensure the safety of the natural environment of the work.