Sheet metal processing plays an important role in mechanical engineering in China. With the improvement of sheet metal processing technology, the requirements for the level of sheet metal processing technology are becoming higher and higher. However, there are still difficulties in sheet metal processing technology, which directly affects the speed of China's sheet metal processing technology advancement. Reasonably improving sheet metal processing technology is the key to the sheet metal industry. The article analyzes the difficulties in sheet metal processing technology and proposes corresponding improvement measures.
Sheet metal processing is an important processing technology in China's mechanical industry. The requirements for sheet metal processing technology are relatively high, and traditional sheet metal processing technology can no longer meet the existing sheet metal processing. There is a certain gap between the processed sheet metal and the current actual requirements. Therefore, it is necessary to improve the sheet metal processing technology in order to meet the requirements of sheet metal processing in today's market. With the continuous progress of technology, problems have arisen in the processing technology of sheet metal. Only by solving the causes of these problems can we improve the level of sheet metal processing technology and achieve breakthroughs in sheet metal processing technology.
Sheet metal processing technology is the process of manually or using molds to create the desired shape and size of some metal sheets. Through welding or small mechanical processing, they can form more complex shapes. For example, in households, fuel tanks, iron pipes, ventilation ducts, iron pots, funnels, chimneys, elbows, and various equipment casings are all sheet metal components. Sheet metal components do not have a fixed structural form. When designing products, the premise of production function should be met: the designed structure should achieve the principles of beautiful appearance and low production cost. Sheet metal components are designed according to specific needs, and different structures need to be designed in different forms. In summary, the design of sheet metal components is not fixed and unchanging, but needs to change with the changes of the product, which is the difficult problem faced by sheet metal processing technology.
The problems encountered in actual sheet metal processing technology can be analyzed from the following points and improvement measures can be taken.
2.1 Material selection for sheet metal processing
Sheet metal processing is generally used on the outer shell of equipment, so the selection of sheet metal is very important. It is necessary to choose appropriate and convenient processing methods, while also reducing processing costs while ensuring strength.
When processing materials in the same structure, it is necessary to ensure the utilization rate of the materials, and the maximum number of materials with the same specification of board thickness cannot exceed three. This requires high utilization of materials during processing and cannot be wasted. For sheet metal structures with high strength and high requirements, the method of thin plate reinforcement can be used to achieve the goal.
The sheet metal processing materials supplied in the market sometimes do not meet the requirements in terms of appearance. For example, parts produced by sheet metal processing may have uneven unfolding dimensions compared to the outer contour dimensions of the raw materials, which can affect their installation on the material.
Some materials do not require external material spraying on the decorative surface, but need to be considered in terms of the decorative surface and texture of the board. If it is not exposed to the outside, the material does not need to be strictly required; But when the material needs to be exposed to the outside, strict requirements must be placed on the texture of the material, and the external material cannot be scratched during processing. So it is necessary to ensure that unnecessary damage is reduced and material utilization is improved during sheet metal processing.
2.2 Structural design and processing of hole defects
Some sheet metal processing requires drilling, which requires designing the holes. In addition to meeting the requirements of the product, it is also necessary to facilitate processing without affecting the later process of sheet metal processing and its beautiful appearance.
(1) When processing square holes to the root, avoid stretching the sheet metal after processing, which may cause deformation of the holes. If manual punching is carried out during sheet metal processing, it will increase the difficulty of the sheet metal processing process.
(2) When sheet metal parts require threaded holes, various methods can be used to achieve this, as shown in Table 1.
(3) Design of curved structures. The specific Bending requirements for the smallest inner diameter edge are shown in Table 2.
(4) Design process of welding structure. Welding is also very important in sheet metal processing technology. In addition to ensuring the appearance of the product, it is also necessary to properly treat the surface seams of the product. Some materials with surface seams can be avoided and processed in the form of corner welds. The general welding methods can be divided into a series of welding methods such as argon arc welding, carbon dioxide shielded welding, manual welding, and gas welding for sheet metal processing. When processing sheet metal, it is necessary to choose a reasonable welding method and choose excellent filling materials to achieve more efficient welding results. Reasonable design of the components of sheet metal structures should leave sufficient space for welding to avoid insufficient space, which may result in non compliant products and waste of materials. In sheet metal processing technology, some sheet metal components are relatively thin. Pay attention to the welding time and the treatment of welding joints, and do not affect the effect of the processed product to prevent deformation of the sheet metal. During the welding process, effective treatment should be carried out on the welded joints to ensure that they are as symmetrical as possible, in order to avoid affecting the appearance of the product. In addition, the distance between the solder joint and the weld seam should not be too large, and its load-bearing capacity should be guaranteed. After welding is completed, the processed product is leveled and polished to maintain a beautiful state after sheet metal processing.
There is an inseparable relationship between sheet metal processing technology and modern production. In today's rapidly developing sheet metal process, we should understand and innovate its processing technology and improvement measures, so that the sheet metal process can have better development. The above explanations and analysis provide reference targets for future sheet metal processing technology. To achieve a better level of design and processing of sheet metal components while meeting product production requirements is the direction that the mechanical industry hopes and needs to move forward. The progress of sheet metal processing technology today marks the direction of the national machinery manufacturing industry, constantly improving itself in development, and allowing sheet metal processing technology to better improve itself in development. This is the driving force for progress.
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