Mechanical manufacturing process

3.1 Gas shielded welding technology
The application principle of gas shielded welding technology is to use the arc to obtain the corresponding heat source, so as to protect the welding position with the help of special gas, thus improving the quality of mechanical manufacturing. It should be noted that gas protection will be generated around the arc of mechanical products during the application of gas shielded welding technology, which can realize the separation of air and molten pool and prevent the welding quality from being affected by air impurities. In addition, key manufacturing and welding processes shall be well controlled to ensure the effectiveness of welding. During the mechanical welding manufacturing process, the stability of the arc shall be ensured to maximize the combustion, so as to establish a new gas protective layer and prevent welding quality problems. At this stage, most manufacturers use carbon dioxide as the gas protective layer when applying welding technology. The reason for choosing carbon dioxide is that the gas can effectively ensure the safety and reliability of mechanical manufacturing and processing.
3.2 Resistance welding technology
Resistance welding technology is widely used in mechanical manufacturing and processing. In the application process, it should ensure that the welding products are between positive and negative charges. After the power is turned on, the corresponding welding shall be carried out with the help of the resistance thermal effect to ensure the welding quality of the product. In this process, it can be concluded that resistance welding technology has the advantages of short heating cycle and high welding efficiency, so it is widely used in the field of automobile machining, and can effectively improve the processing quality and level of mechanical products [2].
3.3 Modular assembly production
For the modular transfer production process, it can be completed in both the general assembly area and the independent workshop. In the traditional automobile assembly process, more than 20000 production and supply raw materials are required. After the introduction of modular assembly production, only more than 1800 parts can be used to realize the assembly line, which maximizes the intensive level of automobile production. Due to the introduction of modular assembly production process, it is helpful to shorten the final assembly line and reduce the workload of workers. The module assembly route for independent production has less restrictions on the size and environment of the automobile assembly workshop, which helps to extend and expand the production line, quickly adapt to new production requirements, and minimize the production cost of the enterprise. For example, if the traditional automobile assembly line has a total of 200 stations, after the introduction of the modular assembly process, the assembly content of 50 working positions of the assembly line can be effectively transferred to the new module assembly line. At this time, the assembly line can reduce 50 stations, and the production of 200 vehicles will also be reduced by 50. When the working capital generated by the production of each vehicle is assumed to be 100000 yuan and the original capital for the final assembly line is 20 million yuan, the capital cost will be reduced by 5 million yuan after it is transferred to the assembly line.
3.4 Laser cutting technology
Laser cutting can use high power density laser beam to scan the material surface to achieve the cutting effect. The advantages of this technology are that the positioning accuracy can be determined within 0.03mm, the slit is narrow, the maximum power density of the focus position can be achieved, and a narrow slit can be formed during the relative movement of the beam and the material. In addition, it also has the advantages of fast cutting speed, good quality and less heat impact, which can minimize the damage of the workpiece. Shorten product development and production cycle. As the laser cutting has many advantages, it is widely used in the field of automobile processing. It can not only effectively reduce the cost of automobiles, but also improve the production quality of automobiles.
3.5 Application of internal combustion engine disassembly technology
When disassembling the internal combustion engine, it is necessary to modify and improve the internal combustion engine tools, and disassemble the internal combustion engine in terms of special structure, bolt connection and pin connection, which will help to improve the disassembly effect of internal combustion engine and parts. In the actual disassembly, it is necessary to disassemble the motor and generator after the effective disassembly of the carburetor. After the above parts are disassembled, the fastening nuts of the engine piston and connecting rod shall be disassembled, and the assembly orientation of the main bearing cap shall be effectively controlled. It is not allowed to replace them at will. When disassembling the crankshaft, when the internal combustion engine frame rises to 1.8m, it is necessary to draw out some sleepers, and use a 1.8m base. When correcting the damaged parts, the measurement table is shown in Table 1.
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