With the deepening of social construction in China, sheet metal parts are gradually applied in people's lives. In general, sheet metal processing is a process of cold working with sheet metal to obtain sheet metal parts that meet the application requirements.
Generally, sheet metal parts have obvious advantages in strength, weight and cost, and have better point-to-point performance compared with traditional parts. Therefore, up to now, sheet metal parts have been gradually applied in high-tech fields such as electronics and communications in China,
At the same time, people have gradually put forward higher requirements for the quality and function of sheet metal parts. Therefore, appropriate optimization of the original sheet metal processing technology has become the focus of the research of sheet metal processing personnel. According to the actual research, this paper believes that the optimization of the processing technology should be carried out one by one from the application of the four basic cold processing links in the sheet metal processing.
1 Blanking link
First of all, as far as the blanking link is concerned, blanking usually refers to the separation of sheet metal materials through the stamping of the die, which results in the separation of sheet metal materials from each other. This link is usually applied to the processing of parts with relatively simple shapes, so as to achieve a high degree of precision in processing shapes and reduce the waste of materials at the same time.
In this link, first of all, the shape of the blanking sheet metal parts should be controlled. In the corner area of the outer and inner holes of the blanking, an arc should be set for excessive corner to avoid sharp angles and reduce the problem of die cracking caused by improper subsequent heat treatment, which affects subsequent sheet metal construction; Then, the punching and its minimum value should be optimized. Generally, when punching a sheet metal part, if the punching size of the blanking sheet metal part is small, the load on the punch will be reduced to a large extent. However, if it is too small, it is easy to cause the data of the pressure borne by the mold to become more sudden, which will affect the quality of the actual mold. For example, in this link, the punching of sheet metal parts should be set according to different load targets of sheet metal parts. In the basic state, the length of the hole diameter should be more than twice the hole spacing and more than 3.00 mm. Finally, the cantilever and groove settings on the blanking parts should avoid being too narrow or too long in the actual process application link, so as to improve the strength of the relevant die edge and control the notch width of the cantilever to be greater than 200 sheet metal thickness.
2 Bending link
Bending link usually refers to the process of preventing sheet metal materials on the bending equipment, causing elastic deformation of sheet metal materials through the pressure of upper mold or lower mold, and plastic deformation according to the actual design scheme after elastic deformation.
In the application process of this link, different parts should be selected according to the actual design requirements, and the actual operation of bending should be determined according to the thickness of sheet metal materials. According to the actual bending experience, local abnormal deformation is most likely to occur in the bending link, which will affect the appearance quality and actual application of the sheet metal parts. Therefore, in the actual operation link, if you want to optimize the process for the bending link, the operator should make a pre cut according to the actual situation, so as to avoid the problem of subsequent deformation. At the same time, when the parts need to be bent for many times, a comprehensive prediction should be made for all the bending operations to avoid the influence of the first bending operation on the subsequent bending process, so as to achieve the expected design goal of sheet metal parts.
3 Riveting link
The riveting process of sheet metal parts refers to the process of deforming sheet metal materials through the action of pressure and then coupling them together. This process is usually applied to screw riveting, bolt riveting and other processes. As for the closing riveting process, usually the nut is round and has a section of embossed gear and wire notch. Therefore, the riveting process for sheet metal parts not only optimizes the quality of the original nut production process, but also avoids the welding process.
If you want to get a better design scheme, first of all, you can select different specifications of molds according to the height of different pressing bolts in the actual pressing and riveting link, and adjust the pressure release of the pressing and riveting device, so as to ensure the pressing quality of the nuts and avoid the problem of waste parts. Secondly, the appropriate sheet metal size can be selected at the link set by the press rivet structure, so as to ensure the press rivet result and avoid the release of the press link of sheet metal parts.
4 Welding link
Welding link is one of the important ways to connect all parts of the structure together in the cold work link in the whole process of sheet metal processing. Therefore, this link is usually placed under the background of high temperature for operation. At present, most common welding methods are argon arc welding and contact spot welding.
