1. Electroplating includes: hot dip galvanizing (color zinc, milky white zinc, dark blue zinc, gray black zinc), nickel plating, stainless steel, etc. The protective layer mainly exists on the surface of the raw material to maintain and decorate the pattern.
2. Spray painting includes spraying and electrostatic powder spraying. After the bending process of precision sheet metal processing is completed and the raw materials are prepared, a spray gun is used to spray architectural coatings on the surface of the sheet metal product, which produces a coating on the surface of the product. After drying, it has a protective effect.
3. Other surface treatment methods: anodizing, chromium trioxide solution, metal drawing, sandblasting, air oxidation and other common problems in sheet metal processing surface treatment operations. 1. All electrochemical solutions should be carried out under the conditions of the components, because the chemical solution will be trapped in the gaps of the components during the whole process, leading to corrosion and oxidation.
4. Slender cylinders (both long and short diameters greater than 2 times the diameter) are generally not suitable for electrochemical solutions because there is no film on their inner surface; In special cases, professional sheet metal processing plants can adopt unique countermeasures to meet the requirements.
5.Due to the assembly of grooves or tiny holes (usually refers to the depth of more than 2 times the diameter or opening distance, but excellent processing technology may not be limited), the inner surface is not easy to be completely covered by electroplating to improve the adhesion of the coating film.
How to optimize the design of medical sheet metal processing?
1. Blanking. As far as blanking is concerned, the blanking of medical sheet metal processing usually refers to the separation of sheet metal materials by stamping dies. This link is usually applied to the processing of parts with relatively simple shapes to achieve high precision in processing shapes and to reduce material waste to a large extent. In this link, the shape of the sheet metal must first be controlled. In the corner area of the outer hole and the inner hole of the stamping, the arc should be set to make the corner excessive to avoid sharp corners, reduce the mold cracking problem caused by improper subsequent heat treatment, and affect the subsequent sheet metal construction. Then, punching and its small value should be optimized. Usually when stamping sheet metal parts, if the stamping size of the sheet metal parts after stamping is too small, then the load of the punch will be greatly reduced. However, if it is too small, the pressure data of the precision stainless steel sheet metal processing die will suddenly increase, thus affecting the quality of the actual die. For example, in this link, the punching of sheet metal should be set according to different sheet metal load targets. In the basic state, the length of the hole diameter should be greater than twice the hole spacing and greater than 3.00mm, and then in the actual process application should avoid the cantilever and groove on the blanking part of the setting too narrow or too long, to improve the strength of the die blade, and control the cantilever groove width greater than 200 sheet metal thickness.
2. The bending link usually refers to the process of preventing and controlling the sheet material on the bending equipment, making the sheet elastic deformation through the pressure of the upper die or the lower die, and then plastic deformation according to the actual design scheme. In the application process of this link, different parts should be selected according to the actual design requirements, and the actual bending operation should be determined according to the thickness of the sheet material. According to actual bending experience, local abnormal deformation is easy to occur during the bending process, which affects the appearance quality and practical application of sheet metal parts. Therefore, in the actual operation process, if the bending process is to be optimized, the operator should make the incision in advance according to the actual situation to avoid the problem of subsequent deformation. At the same time, when parts need to be bent multiple times, a comprehensive estimate should be made in all bending operations to avoid the impact of medical sheet metal processing bending operations on the subsequent bending process, so as to achieve the expected sheet metal design goals.