Dalian auto parts processing market research stage. This is a crucial step, because the car has to be invested in hundreds of millions of Yuan casually. It would be miserable if the car is not welcomed by the market without market research. The next step is the production line. Before this step, there must be no problems in the previous processes.

Once the production line is designed and put into use, it depends on a lot of money to maintain its operation. Connecting rod components are composed of connecting rod body, connecting rod cap, bolts, nuts, etc. During the working process of the engine, the connecting rod shall bear the alternating pressure of expansion gas and inertial force. In addition to sufficient strength and stiffness, the connecting rod shall also minimize its own weight to reduce the inertial force.

The cross section of the connecting rod body is I-shaped, and the size gradually decreases from big end to small end. The common gas welding in the repair workshop is to use acetylene combustion and oxygen combustion to produce high-temperature flame, so that the welding rod and weldment are melted and joined. This high-temperature flame can also be used to cut the metal, which is called gas cutting. The application of gas welding and gas cutting is flexible.

However, the heat affected zone of gas welding is large, which makes the weldment deform and metallographic structure change, and the performance decreases. Therefore, gas welding is rarely used in automobile manufacturing. For the machining process (heat treatment process) of precision parts, determine the machine tool, clamping method, measurement method, machining allowance, cutting parameters and man hour quota used in each process. Fill all the contents in the process specification table, which is the procedure of machining process.