Figure 1 shows a part of a cake baking tray with a 0.4 mm thick sheet. The parts are produced in large quantities and need to be processed by punching and multiple deep drawing processes. If single-step mold production is adopted, the number of stamping equipment and production workers required will be more, the delivery time is long, and the production is long. Low efficiency and high production costs. In order to improve production efficiency and reduce production costs, it was decided to use a progressive deep drawing composite mold to process, but the stamping process and mold structure must be improved. 1. Process and layout The original part production process is: blanking → positive drawing → reverse drawing → reverse drawing → shaping → cutting, a total of 6 processes. On this basis, the progressive die layout map was first determined by analysis (see Figure 2). In order to ensure the width of the strip and the step distance are accurate, in the layout drawing 2, the double-ring incision method is adopted, and the two incisions are respectively staggered in four directions and connected to the strip, and are installed in the 7-station of the mold. Guide pin. The process flow of the whole die stamping is divided into: slit → slit → leveling → positive drawing depth → reverse drawing depth → reverse drawing depth → shaping → blanking → cutting. The mold structure is shown in Figure 3. 2. Problems in the test mode After the mold is finished, the test is carried out on a 1 100kN automatic press. There are several problems: 1 the mold feed is not smooth, and the strip has a large curvature after the first reverse drawing process. 2 The feeding step is not accurate, and the positioning hole is elongated or deformed. 3 strips are removed from the float pin. Since then, although several improvements have been made, the above problems have not been fundamentally solved and the molds cannot be delivered to the production department. Swing Kitchen Cabinet Door,Elegant Kitchen Cabinet Door,Aluminium Door Zhentong Door Industry Co., Ltd. , http://www.china-steelsecuritydoor.com
