When bending, we should first confirm the cutter and groove used in bending according to the size on the drawing and the thickness of the data. Preventing the deformation caused by the collision between the product and the cutter is the key to the selection of the upper mold (in the same product, different models of upper mold may be used), and the selection of the lower mold is determined according to the thickness of the plate. The second is to affirm the sequence of bending. The general law of bending is from inside to outside, from small to large, from special to ordinary. For the workpiece with the edge to be crushed, firstly bend the workpiece to 30 ° – 40 °, and then press the workpiece with the leveling die.
There are bending, riveting, flanging tapping, spot welding, convex hull, segment difference. Sometimes after bending two times, the nut or stud should be pressed well. Among them, the center with mold convex hull and segment difference should be processed first, so as to avoid the interference of other processes after processing first, and the required processing cannot be completed.
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