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Flat-pressure drawing is a very common drawing method, the workpiece is fixed on the mold, abrasive belt high-speed operation, the back of the belt has a pneumatic control can move up and down the pressure block, the pressure belt after the clothes were Processing surface drawing. The usual equipment used is a flatbed belt machine. Flat-pressured brushed to a small area of the plane drawing surface, widely used in digital camera shell drawing, cell phone case drawing and so on. The brushed surface of the wire is usually continuous silk straight wire. As the use of abrasive belt, with a wide range of particle size options, so both the use of coarse-grained belt processing out of rough, with obvious feel lines, you can also use fine-grained belt and processing more delicate silk pattern. 3M can not only provide ordinary belt, but also can provide more suitable for drawing the pyramid series belt and non-woven nylon belt. Brass Casting And Cnc Machining Supplier Belt on the surface of the overall grinding drawing, will produce a lot of heat, and the drawing side of the workpiece to produce stress concentration problems, especially for thin-walled parts will have warped deformation problems. So this way to adapt to the drawing of a small area. Because it is down-type operation, it is usually applied to the plane, the surface can not have a boss, such as protruding text logo. However, through the ingenious design of dies and other molds, it is also possible to draw a slightly curved workpiece. The specific method depends on the degree of bending to discuss in detail.