Stamping Technology and Tooling Design of Evaporator Fixed Plate
The evaporator fixed plates are widely used as fixed pieces of refrigeration appliances. According to the requirements of the product processing parts, the stamping process of evaporator fixed plates is used to solve the problem of shape forming of the product, large output and high precision.
The object of stamping process of evaporator fixed plates is small and medium carbon steel and other metal materials, such as cold-rolled plates, galvanized plates and aluminum plates, etc. It adopts manual feeding, sheet positioning and mechanical stamping process to get the processed products. This article will briefly introduce the stamping process of evaporator fixed plate and the tooling design.
(1) The stamping process of evaporator fixed plate
The key process of manufacturing evaporator fixed plate is blanking-shearing-forming-bending. In the process of stamping, the evaporator fixed plate blanking part is carried out on a four-column hydraulic press, and the percussion is used for blanking after positioning. In the shearing process, the upper and lower tools of the press are provided with two blades, and the sheet is cut in place after the imposition; The pressing and forming process is to punch the flat sheet metal into a shaped piece through the punch, and the flat pieces are bent and connected by a series of stamping processes. The bending process is to use a press machine and a mold to bend or fold the sheet into an integral shape. After the forming process, the evaporator fixed plate can be used as the working part of the refrigerator.
(2) Mold Design of Evaporator Fixed Plate
According to the shape and size of the evaporator fixed plate, a mold is designed, and the structure of the mold is determined by the forming process requirements. Generally, the mold of evaporator fixed plates consists of sets of upper die, die and die rods. The upper dies are respectively made of high-grade die steel with good wear resistance. The dies are made of high-grade die steel with good plastic and fatigue resistance. The upper and lower dies are fixed to the die post by reaming bolts. During the whole forming process of the evaporator fixed plate, the relative motion between the punch and die will happen. According to the shape and size of the evaporator fixed plate, the material steel adopted for manufacture of the die should meet the requirements of the forming part. In addition, the assembling position of the mold should ensure the accuracy of forming, the clamping of the blank should be stable, the splint should be provided reasonably, the inner and outer wrinkles should be checked, the cavities should be nozzles free from burrs, and the shape and size of the forming should be consistent with the drawings.
In conclusion, stamping is an important process for manufacturing evaporator fixed plates. It requires high precision of the molded product, simple engineering structure and convenient maintenance of the mold. In the process of stamping, negative pressure should be used for air-aid, and lubrication should be used to facilitate the forming process. At the same time, some attentions should be paid to the design and manufacture of the mold, so as to make the molded parts meet the design requirements.
