Sheet metal manufacturing refers to the blanking or cold and hot forming of metal sheet materials, aluminum profiles and pipe fittings without changing their cross-sectional characteristics, and then the assembly is carried out by means of interfaces such as electric welding, riveting and screw connection to produce the specified metal structure. The key involves milling workers, blanking, stamping dies, metal material drilling Electric welding, heat treatment process, surface treatment, riveting, assembly and other various technical types of work.
Sheet metal manufacturing
Technical characteristics of sheet metal manufacturing because most sheet metal manufacturing is the production and manufacturing of cold or hot separation and forming of raw materials without basically changing the cross-sectional characteristics of metal sheet materials, aluminum profiles and pipe fittings. Because the metal materials produced and manufactured cause plastic deformation below the manufacturing hardening temperature, it does not cause cutting.
The selection of sheet metal manufacturing can make a variety of goods with different appearance, specifications and characteristics, and the steel frame structure goods produced and manufactured have high compressive strength and bending stiffness, and can make full use of its bearing capacity.
In the whole production and manufacturing process of sheet metal structure, each accessory constituting the structure can be assembled into prefabricated components according to the position, specification correlation and precision regulations, and according to the connection methods such as electric welding, riveting, bite or expansion. Therefore, the coordination ability of the design scheme is large.
Based on the above analysis, the key features of sheet metal manufacturing are as follows
① Compared with the manufacturing of forged and cast parts, sheet metal prefabricated components have the advantages of light weight, saving metal composites, simple manufacturing process, reducing product cost and saving production cost.
② Most of the sheet metal prefabricated components manufactured by laser welding have low manufacturing accuracy and large welding deformation, so there is a large amount of deformation and correction after welding.
③ Because the weldment cannot be disassembled and connected and cannot be repaired, it is necessary to adopt useful assembly methods and assembly procedures to reduce waste. On site assembly is often carried out for large, medium-sized or large commodities, so it should be tried in the factory first. In the trial, it is appropriate to use disassembled connection to temporarily replace non disassembled connection.
④ In the whole process of assembly, it is often necessary to select, adjust and accurately measure and test the product quality for several times.
Characteristics of sheet metal manufacturing
The application of sheet metal manufacturing because sheet metal manufacturing has a series of advantages such as manufacturing efficiency, stable quality, low cost and can produce and manufacture complex products and workpieces. Therefore, it is widely used in the application fields of mechanical equipment, vehicles, airports, light industry, motors, household appliances, electrical products and their daily necessities, and occupies a key influence. According to the survey, sheet metal parts account for 60% ~ 70% of automotive industrial parts; Airfield sheet metal parts account for more than 40% of the whole machine parts; Mechanical and electrical engineering, instrument equipment and sheet metal parts in instrument panel account for 60% ~ 70% of the number of production and manufacturing accessories; Sheet metal parts account for more than 85% of accessories in electronic equipment; The sheet metal parts of daily appliances in the sales market account for more than 90% of the total metal manufacturing.
With the development of science and technology and the development of production and manufacturing technology, a large number of new technologies such as sheet metal aided design and design scheme (CAD), aided design and manufacturing (CAM), aided design process technology (CAE) and many new machines and equipment such as NC machine tool blanking, forming, electric welding and welding (such as optical fiber laser cutting, plasma cutting machine, water knife cutting machine CNC turning head press and CNC machine tools (sheet metal bending, welding manipulator, robot welding, etc.) are widely used in various fields.