Analysis of Precision Sheet Metal Processing Technology

Due to its open form, simple manufacturing process, and high manufacturing efficiency, sheet metal parts are gradually being used in the racks and structural parts of food machinery and become an industry trend.

Medium and thick plate sheet metal is widely used in this field, but medium and thick plates are greatly affected by the material thickness, bending process, welding process, etc., usually there will be relatively large gaps after forming, resulting in increased welding deformation. Large, so that the size and shape tolerance of the parts cannot be guaranteed, and even welding defects will affect the appearance and quality of the product. Secondly, the processing of medium and heavy plates has some technological difficulties. In order to overcome the technical difficulties, the sheet metal craftsmen of our company have summarized a set of effective methods to solve the problems of plate metal processing, and I will share them with you here.

Sheet Metal Process Analysis

1. Sheet metal process control mainly emphasizes the correctness of the process. The reasonable sheet metal process flow of this part is: raw material (drawing plate with better flatness)-laser cutting , leveling, process (key process control)-welding.

2. The second step is to control the welding deformation to ensure the accuracy of the parts.

The traditional process is to use Solid Works drawing method, normal expansion, bending, welding, the result is that the gap between the parts is very large, and the amount of wire filling is large during welding. Everyone knows that the deformation of stainless steel after welding will be greater, which will lead to parts after welding. The deformation cannot be controlled, and it is impossible to produce qualified products that meet the requirements of assembly accuracy. The part gap is shown in Figure 2.

Our method is to use drawing software to expand this part, add slices at C, E, F, control the maximum gap after welding to 0.2~0.3mm, and use manual chamfering machine or polishing machine before sheet metal bending Remove excess base material, so as to achieve precision machining of parts. As shown in the red circle shown in Figure 3.

3. Explanation of Results

The round hole of the part process should be larger. In the food machinery industry, welding is not required, but it is more conducive to the cleaning of the machine.

Use a three-dimensional flexible platform to ensure the shape and dimensional accuracy of the work piece, and argon arc welding is used to bond the welding parts at multiple points. After the work piece is fixed, the parts can be taken off to complete the free welding, which can effectively save time.

During welding, since the product gap is very small, the welding wire can be used instead of the self-fusion method. After welding, the texture is beautiful and does not need to be polished. It not only improves the efficiency and the surface quality of the product, but also the key is that the small gap parts are not welded. Shrinkage occurs, the parts are basically non-deformed, no need to increase the shaping process, and can meet the technical requirements at one time.

Comparison of structural advantages and disadvantages: After optimization, welding is easy to achieve, welding deformation is small, no grinding process is required, and the appearance is smooth and beautiful, which improves efficiency and saves costs.