Views:0 Author:Site Editor Publish Time: 2020-05-25 Origin:Site
In the processing industry, sheet metal processing has become a more common and common form of processing. Sheet metal products are more and more popular with users, such as storage cabinets, workbenches, shelves, and sheet metal cabinets. It is made of sheet metal, which increases the strength of the object and prolongs the service life. Sheet metal processing can be divided into ordinary processing and precision processing. For ordinary sheet metal products, the difference between them is the degree of accuracy required for processing items. For example, some daily occupancy items can be processed by ordinary processing standards. Precision sheet metal is mainly used in industries with special assembly requirements or high shape requirements. The following is about some common knowledge of sheet metal for Guangzhou Baosen:
After the drawings are in hand, choose different blanking methods according to the different drawings and batches, including laser, CNC punching, shearing, mold and other methods, and then make the corresponding opening according to the drawings. Place a workbench beside the numerical control and laser, which is beneficial to the sheet material placed on the machine for processing, reducing the workload of lifting the board. Some available scraps are placed in designated places to provide materials for trial molds when bending. After the workpiece is blanked, the corners, burrs, and contacts must be trimmed (sanding treatment). At the tool joints, use a flat file to trim. For workpieces with large burrs, use a sanding machine to trim, small inner hole contacts It is trimmed with a corresponding small file to ensure a beautiful appearance. At the same time, the trimming of the shape also guarantees the positioning during bending, so that the position of the workpiece against the bending machine during bending is consistent, and the size of the same batch of products is guaranteed.
After the blanking is completed, it enters the next process, and different workpieces enter the corresponding process according to the processing requirements. There are bending, pressure riveting, flanging and tapping, spot welding, convex hulling, and step difference. Sometimes the nut or stud must be pressed after bending one or two passes, where the convex hull and step difference of the mold should be considered Process first, so as not to interfere with other processes after being processed first, and the required processing cannot be completed. When there is a hook on the upper cover or the lower shell, if it cannot be welded after bending, it must be processed before bending.
Workpieces are subjected to surface treatment after bending, riveting and other processes are completed. Different surface treatment methods are different. After cold plate processing, surface plating is generally performed. After plating, no spraying treatment is performed. Phosphating treatment is used. After chemical treatment, spraying treatment shall be carried out. The surface of the electroplated board is cleaned, degreased, and then sprayed. The stainless steel plate (with mirror panel, fog panel, and brushed plate) can be brushed before bending, without spraying, if it needs to be sprayed, it needs to be roughened; the aluminum plate is generally oxidized, and different colors are selected according to different colors of spray Oxidation background
Commonly used are black and natural oxidation; aluminum plates need to be sprayed after chromate oxidation treatment. Surface pretreatment can make the surface clean, significantly improve the adhesion of the coating film, and can double the corrosion resistance of the coating film. The cleaning process first cleans the workpiece, hangs the workpiece on the assembly line, first passes through the cleaning solution (alloy degreasing powder), then enters the clear water, then passes through the spray area, then passes through the drying area, and finally removes the workpiece from the assembly line Remove.
This is the general process for ordinary sheet metal processing. The work is very simple, but sometimes it is difficult to do it. It is not necessary to make a level and quality sheet metal product. The actual operation of the sheet metal platform can be understood.