3．下料：下料方式有各种，主要有以下几种方式①． NC数控下料，NC下料时首先要编写数控加工程式，利用编程软件，将绘制的展开图编写成NC数拉加工机床可识别的程式，让其根据这些程式一步一刀在平板上冲裁各构形状平板件，但其结构 受刀具结构所至，成本低，精度于0.15。
Do you know the processing flow of sheet metal parts? Actually, I don't know much about it, so now I'm going to tell you from the cabinet's sheet metal processing.
1, flanging: also called hole, turn hole, that is to draw a slightly larger hole on a small base hole, then tapping, mainly using thin plate thickness of sheet metal processing, increase its strength and thread number, avoid sliding teeth, generally used for thin plate thickness, its hole Zhou Zhengchang shallow edge, thickness basically unchanged, allow thick. When the degree of 30-40% is thinner, the height of 40-60% higher than the normal flanging height can be obtained. The maximum flanging height can be obtained when it is thinned by 50%. When the thickness of the plate is larger, the thickness of the plate, such as 2, 2.5, etc., can be tapped directly.
2. pressure rivet: pressure riveting on the company, the main pressure riveting nuts, screws, loose and so on, it is through the hydraulic pressure riveting machine or punch to complete the operation, it is riveted to sheet metal parts, there is also rising riveting way, need to pay attention to the direction.
3. blanking: there are all kinds of blanking methods, mainly in the following ways:.NC numerical control. NC is the first to write numerical control program. Using programming software, the drawing is written into a program that can be identified by the NC number drawing machine tool. However, its structure is reduced by the tool structure, the cost is low, and the accuracy is 0.15.
2. Shearing machine: it is a simple material for cutting the strip by cutting the cutting bed. It is mainly prepared for the die blanking forming, the cost is low, the precision is less than 0.2, but it can only process the strip without the hole and no cutting angle.
(3). Punching machine: it is a kind of shape material that can be blanked out of plate parts with one or more steps on the plate. Its advantages are short time, high efficiency, high precision and low cost. It is suitable for mass production, but it is necessary to design a mold.
4. Sawing machine: mainly use lower aluminum profile, square tube, picture tube, round bar material and so on, with low cost and low precision.
Laser cutting is used to cut the structure of the flat plate on a large plate by laser cutting. It needs to write a laser program like the NC material. It can lower the complex shape of the flat plate, with high cost and the precision of 0.1..
4. punching machine: using die forming process, the general punching machine has punching, cutting angle, blanking, punching bulge (Bump), punching and tearing, drawing holes, forming and other processing methods. Its processing needs corresponding die to complete operation, such as punching die, punch die, tearing die, drawing die, molding mould, etc. Pay attention to the position and direction.
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