The workpiece in bending, riveting and other processes after the completion of surface treatment, different plate surface treatment is different, cold plate processing after the general surface electroplating, plating after not spraying treatment, the use of phosphating treatment, phosphating after spraying treatment. The surface of the plating plate is cleaned, degreased, and then sprayed. Stainless steel plate (mirror plate, fog panel, drawing plate) can be drawn before bending, without spraying, such as spraying to hair treatment; Aluminum plate is generally treated with oxidation, and different oxidation base colors are selected according to different colors of spraying.
Commonly used black and natural oxidation; Aluminum plate needs to be sprayed after chromate oxidation treatment. Surface pre-treatment to do so can clean the surface, significantly improve the adhesion of the film, can multiply the corrosion resistance of the film. The flow of cleaning first clean the workpiece, first hang the workpiece on the line, first through the cleaning solution (alloy to remove the oil powder), and then into the clean water, followed by the spray area, and then through the drying area, and finally take the workpiece off the line.
After the surface pretreatment, enter the spraying process, in the workpiece assembly requirements after spraying, teeth or part of the conductive hole need to be protected treatment, teeth can be inserted into the soft glue rod or screw, conductive protection needs to be pasted with high temperature tape, a large number of positioning tools to positioning protection, so that the spraying will not spray into the workpiece internal, The nut (flanging) hole that can be seen on the outer surface of the workpiece is protected by screws, so as to avoid the need to return teeth at the nut (flanging) hole after spraying.
Some large batch of workpiece also use tooling protection; When the workpiece is not equipped with spraying, the area that does not need to be sprayed is blocked by high-temperature resistant tape and paper, and some exposed nut (stud) holes are protected by screws or high-temperature resistant rubber. If the workpiece is double-sided spraying, use the same method to protect the nut (stud) hole; Small workpiece with wire or paper clips and other items channeled together after spraying; Some of the workpiece surface requirements are high, in the spray before the ash scraping treatment; Some workpieces are protected by special high temperature resistant stickers at the ground. When spraying, the workpiece is first hung on the assembly line, and the dust on the surface is blown away with the air pipe. Enter the spraying area to spray, after spraying along the line into the drying area, and finally remove the sprayed workpiece from the line. There are two categories of manual spraying and automatic spraying, so the tooling used is different.
After spraying into the assembly process, before assembly, to the original spray used in the protection sticker tear, to determine the parts of the threaded hole was not scattered into the paint or powder, in the whole process, to wear gloves, to avoid the hand dust attached to the workpiece, some of the workpiece also with air gun blow clean. After the assembly is ready to enter the packaging link, the workpiece is checked into a special bag for protection, some without special packaging of the workpiece with bubble film packaging, before packaging the bubble film can be cut into the size of the packaging of the workpiece, so as to avoid one side of the packaging side cutting, affecting the processing speed; Large batch can be customized
Special cartons or bubble bags, rubber pads, pallets, wooden cases, etc. After packing, put it into the carton, and then paste the corresponding finished product or semi-finished product label on the carton.
The quality of sheet metal parts in addition to the strict requirements in the production process, is independent of the production of quality inspection, it is strictly according to the drawing size, 2 it is strictly controlled the appearance quality, the size does not conform to repair or scrap processing were analyzed, and the appearance is not allowed to touch scratches, after spraying color, corrosion resistance, adhesion test, etc. This can find the expansion diagram errors, bad habits in the process, process errors, such as the number of stamping programming errors, mold errors, etc.
Post time: Nov-29-2022
