Sheet metal processing has an important role in China's mechanical engineering. With the improvement of sheet metal processing technology, the requirements for sheet metal processing technology level are higher and higher. But there are still difficulties in the sheet metal processing technology, which is directly related to the speed of the sheet metal processing technology forward, and rationally improving the sheet metal processing technology is the key to the sheet metal industry. This paper analyzes the difficulties of sheet metal processing technology and puts forward the corresponding improvement measures.
Sheet metal processing in the machinery industry in China is a kind of important processing technology, the requirements of the sheet metal processing technology is relatively high, while the traditional sheet metal processing technology already cannot satisfy the existing sheet metal processing, the processing of sheet metal and now actually require the existence of a certain gap, so you have to improve the processing technology of sheet metal, In order to meet the requirements of sheet metal processing in today's market. With the continuous progress of science and technology, there are problems in sheet metal processing technology. Only by solving the causes of these problems can we improve the processing technology level of sheet metal and achieve a breakthrough in sheet metal processing technology.
1. Difficulties in sheet metal processing
Custom Sheet Metal Fabrication is to make some metal sheets by hand or mold, so as to make them form the shape and size we want and require. Through welding or a small part of mechanical processing, make them form a more complex shape. For example, the fuel tank, iron pass, ventilation pipe, iron pot, funnel, chimney, elbow and so on in the family, as well as the shell of various equipment. These are the components of sheet metal. Sheet metal components do not have a fixed structure form, in the design of products, should meet the premise of production function: let the designed structure to achieve the appearance of the beautiful and low production cost principle. Sheet metal components are designed according to specific needs, and different structures should be designed in different forms. In a word, the design of sheet metal components is not fixed, but to changes with the change of products, which is the difficult problem of sheet metal processing technology.
2 Sheet metal processing process improvement measures
The problems encountered in the actual sheet metal processing technology can be analyzed from the following points and improved measures.
2.1 Material selection for sheet metal processing
Sheet metal processing is generally used in the shell of equipment, so the selection of sheet metal is very important. It is necessary to choose the appropriate, convenient in processing, but also to reduce the cost of processing under the premise of ensuring the strength.
In the same structure processing material, to ensure the utilization of materials, the same specification of the plate thickness of the material can not exceed three. This requires the processing of materials to a high degree of use, and can not be wasted. For the sheet metal structure with high strength and high requirements, the method of sheet steel reinforcement can be used to achieve the purpose.
The shape of sheet metal processing materials supplied on the market sometimes does not meet the requirements. For example, the parts processed by sheet metal, the expansion size and the outer contour size of the raw material are not equal, which will affect its installation on the material.
Some materials do not need to be sprayed on the appearance of the material on the decorative surface, which needs to be considered in the decorative surface of the plate and the texture of the plate. If it is not exposed to the outside, the material is not strictly required; but when the material is exposed to the outside, it is necessary to have strict requirements on the texture of the material, and the material outside can not be scratched when processing. Therefore, it is necessary to ensure that in sheet metal processing to reduce unnecessary damage, improve the utilization rate of materials.
2.2 Design and processing of hole structure
Some sheet metal processing needs to be punched, which requires the design of the hole. In addition to making the product meet the demand, but also convenient processing, does not affect the later process of sheet metal processing and its beautiful appearance. (1) When the square hole is processed to the root, avoid stretching the plate after the sheet metal processing, which leads to the deformation of the hole. If manual drilling is carried out during sheet metal processing, it will increase the difficulty of sheet metal processing. (2) When the sheet metal parts need threaded holes, they can be achieved by various methods, as shown in Table 1.
(3) Design of bending structure. Specific bending requirements for the minimum edge of its inner diameter are shown in Table 2.
(4) Design process of welding structure. Welding in sheet metal processing technology is also very important, in addition to ensure that the appearance of the product is beautiful, but also the surface of the product joints properly handled. Some materials with surface joints can be avoided and processed in the form of fillet welds. General welding can be divided into: argon arc welding, carbon dioxide welding, manual welding and gas welding and a series of welding methods to carry out sheet metal processing. In sheet metal processing, reasonable welding methods should be selected, and the filling materials should be selected well, so as to obtain higher efficiency welding effect. Reasonable design of the components of the sheet metal structure should leave enough space for welding, to avoid the phenomenon of insufficient space left, which will make the welded products do not conform to the rules, resulting in waste of materials. In sheet metal processing technology, some sheet metal components are relatively thin, pay attention to the welding time and welding joint processing, can not affect the product effect processed, prevent the sheet metal deformation. In the welding process, the welding joint should be effectively processed, so that the welding joint is as symmetrical as possible, so as to avoid the impact of the welding joint on the appearance of the product. In addition, the distance between the solder joint and the weld should not be too large, to ensure its bearing capacity. After the completion of welding, smooth and trim the processed products to keep the sheet metal processed products in a beautiful state.
3 conclusion
There is an inseparable relationship between sheet metal processing technology and modern production. In the rapid development of sheet metal technology today, we should understand and innovate its processing technology and improvement measures, so that the sheet metal technology has better development. Through the explanation and analysis of the above aspects, it provides reference targets for the sheet metal processing technology in the future. In the case of meeting the product production, let the design and processing of sheet metal components to achieve a better level, which is the direction of the machinery industry hopes and needs to move forward. Today, the progress of sheet metal processing technology marks the direction of the national machinery manufacturing industry, and constantly improves themselves in the development, so that the sheet metal processing technology in the development of better improves themselves, which is the driving force in the progress.