Core Technologies and Rust Prevention Methods in Sheet Metal Processing
Besides the various cold stamping methods commonly used in machinery manufacturing, sheet metal parts also employ several forming methods. Sheet metal processing is a crucial technology that sheet metal technicians need to master, and it's also an important process in the forming of sheet metal products. Sheet metal processing includes traditional cutting, blanking, bending, and forming methods and process parameters, as well as various cold stamping die structures and process parameters, the working principles and operation methods of various equipment, and new stamping technologies and processes. The processing of metal sheets for parts is called sheet metal processing. Sheet metal processing is a processing technology, and there is still no complete definition for it. According to a definition in a foreign professional journal, it can be defined as: Sheet metal is a comprehensive cold processing technology for thin metal sheets (usually below 6mm), including shearing, punching/cutting/compound cutting, bending, riveting, splicing, and forming (such as car bodies). Its significant characteristic is that the thickness of the same part is consistent.
First, rubber hydroforming: High-pressure liquid is used to fill a rubber tire, causing it to expand and thus promoting the formation of parts according to the shape of the molded tire. Parts formed in this way have high precision and no indentations on the surface. A rubber tire is a versatile flexible die that can hold multiple tires of different shapes on a worktable. A hydraulic press can press out multiple parts in one cycle. The result is high efficiency and low cost. This method is mainly used for forming shallow curved surface parts such as ribs and frames, and the equipment used is a rubber bag hydraulic press. Second, drawing bending forming: First, the profile material is stretched along its length, then bent while maintaining tension according to the contour of the bending die. Pre-stretching effectively changes the stress distribution of the material during bending. To improve the forming accuracy of the parts, the equipment used is a rotary table bending machine and rotary arm bending machine for forming unidirectional bent parts, such as segmented frames, frames, etc., with bending angles not exceeding 180°. Rotary table bending machines can not only form unidirectional bent parts, but also bidirectional bent parts with bending angles of 360° and ring frames. Shot peening: Numerous steel balls with a diameter of 0.3 or 2.5 mm are ejected from a nozzle by compressed air (or a high-speed impeller). The high-speed elastic flow impacts one side of the steel material, increasing the surface area of the metal layer due to compression, generating compressive stress, and causing the steel material to bend to the side not hit by the projectiles, thus forming a curved surface shape. Shot peening is a major forming method for large integral wall panels. This method can improve the fatigue strength of parts, and the equipment and processes used are relatively simple. Fourth, what to do if the surface of a metal cabinet rusts?
1. We can use alkaline, alkaline chloride, or detergents without bleach to clean it. However, there is one type of detergent we cannot use to clean cabinets. It is a detergent containing chloride salts. Because detergents containing chloride can cause pitting in the cabinet or cause it to rust again.
2. We can also use appropriate tools to clean stainless steel cabinets. For example, a soft cloth or plastic can be used to clean the surface of stainless steel. Of course, we can also use special stainless steel cleaning balls, but follow the relevant instructions.
3. For some stainless steel cabinets with grinding lines or textures, reasonable cleaning should also be carried out according to their characteristics. Regarding the grinding line, it should be wiped along the parallel direction of the grinding line. Use a soft cloth or plastic wiping material. Cabinet panel requirements: 1. Cabinet panel: Industry requirements stipulate that standard cabinet panels should be cold-rolled steel sheets. Many cabinets on the market do not use cold-rolled steel, but rather hot-rolled steel sheets or even iron sheets, which are prone to rust and deformation. Please carefully identify! Cold-rolled steel sheets. Cold-rolled steel sheets are cold-rolled steel sheets, commonly referred to as cold-rolled plates.
