1. The design is based on the customer's needs. Before drawing, before starting to process the sheet metal processing in Wenzhou, the appropriate material should be selected according to the processing requirements of the elevator frame and other elevator products and the part drawing should be reasonably expanded. The tolerance dimensions, burr direction, tearing, The pressure riveting position, plate thickness and tolerance, bending radius, etc. should ensure scientific accuracy. When cutting, the specific method should be determined based on the actual situation.The shearing machine has high accuracy and low cost, but it is suitable for block or strip material without holes and corners.The bed is efficient and economical.It is suitable for mass production but needs to design molds with high shot accuracy. It is suitable for flat parts with complex shapes but with high cost.
2. Stretching and bending Generally, the stretching in the Wenzhou sheet metal processing of elevators needs to keep the thickness of the bottom of the material unchanged and make the corners gradually thinner. At this time, the position near the flange will become thicker. Bending is the transition from 2O flat parts to 30 parts. The bending machine applies a certain pressure to the metal sheet to transform it from elastic deformation to plastic deformation. At this time, the sheet will bend freely and then act under pressure. The lower bending force arm and the radius of curvature will continue to decrease until a V-shaped bend is formed. Among them, the folding bed mold and folding bed are the main tools, and the thickness, bending direction, size, and angle of the plate are strictly controlled.

3. After welding, forming, blanking, tapping, bending and other processing steps, the parts should be group welded to improve the strength of the parts. The common welding methods are spot welding, gas shielded welding, etc., but the welding deformation must be strictly controlled and targeted Elevator shields, car parts and other products should fully consider their electrode materials, welding seam requirements, workpiece thickness, etc. and select the appropriate welding power source and current, so as not to affect the welding quality and efficiency of elevator products. On this basis, sheet metal forming is completed by surface processing. Baking paint, electrogalvanizing, phosphating film, chromate, etc. are common surface treatment methods, and the sandblasting and spraying process of the elevator car frame is also relatively common.

4. The so-called combination protection combination is to comply with the relevant process requirements in a certain way and combine different parts according to the actual production needs. In the combination, some parts of a certain combination part may appear damaged in the previous section In order to ensure the quality and service life of the combined parts, this process should be disassembled and then reassembled. In order to avoid this phenomenon, on the one hand, we must pay attention to ensure that the quality control of the production process is effective, on the other hand, we must ensure the protection of metal materials, so that the finished sheet metal products can have good gloss without bubbles and uniform color.