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The main steps of sheet metal processing

Update:22-01-2018
Summary:

For brittle materials subject to thermal damage, high s […]

For brittle materials subject to thermal damage, high speed and controllable cutting through laser beam heating causes large thermal gradients and severe mechanical deformation in the region, resulting in cracks in materials, called controlled fracture cutting.
Sheet metal processing division and the operation needs to have clearly defined the blanking mode according to the different choices of expansion graph and quantities of different metal processing methods of laser, CNC punching, shearing mould, etc., the main steps of sheet metal processing, mainly divided into the following points:
1, select the blanking, after completion, enter the next process, different workpiece according to the requirements of processing into the corresponding process;
2, bending to first according to the drawings on the size of the cutter and knife groove bending the material thickness determined by the product and tool, avoid collision caused by deformation is the key on the mode selection (in the same product, may use different types of mold, mold selection) is determined according to the the thickness of the plate;
3, when we press riveting, we should consider the height of stud and choose the same die, then adjust the pressure of the press to ensure that the stud and workpiece surface are neat, so that the stud can not be pressed or pressed out of the workpiece surface, and the workpiece will be scrapped. There are argon arc welding, spot welding, carbon dioxide protection welding, manual electric arc welding and so on. Spot welding must first consider the location of workpiece welding, and consider positioning tools to ensure accurate spot welding in stainless steel sheet batch production.
4, in order to welding firm, hit a bump in the workpiece to be welded, can make the bump in electricity before welding and flat uniform contact, in order to ensure the heating, but also can determine the welding position, the same, to carry out welding, to adjust the preloading time, holding pressure time, maintain time, rest time, to ensure that the workpiece can be welded firmly;
5, sheet metal workpiece in bending, pressure riveting process after surface treatment, different ways of handling the surface of the plate, cold plate processing after surface plating, plating after no spray treatment, is used for phosphating, phosphating after spraying treatment. Plate surface cleaning, degreasing, and then spraying;
6, sheet metal in the surface pretreatment, into the spraying process, the workpiece assembly after spraying, tooth or part of conductive holes need to be protected, check into the soft tooth hole rod or screw, need to protect the conductive tape with high temperature, large quantities of the positioning fixture to be protected so, when spraying can not spray to the workpiece, the nut on the outer surface of workpiece can see (flanging) with screws to protect Kong Chu, lest after spraying the workpiece (nut hole flanging) need back teeth;
7, after spraying into the assembly process, before the assembly, to protect the original sticker for spraying tear, determine the parts of internal thread holes are not scattered into the paint or powder, in the whole process, to wear gloves, hand to avoid dust attached on the workpiece, the workpiece are blown clean. Assembled after entering the packaging, protection packaging bag into the special workpiece after inspection, no special packaging of workpieces with bubble film packaging, the packaging before the bubble film can cut into packaging workpieces, so as not to affect the cutting side side of the packaging, processing speed of large quantities of stainless steel; can be customized special carton or bubble bag, pad, wooden tray, etc.. After packing, put it in a carton, and then put the finished product or semi finished label on the carton.
The quality of sheet metal parts is not only strict in production process, but also requires quality inspection which is independent of production. First, strictly check dimensions according to drawings, and two, strictly control the appearance quality. In this way, we can find errors in the unfolding of the sheet metal, the bad habit in the process, and the error in the process.

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