3. Some special materials can be bent into rectangular tubes with general purpose molds on ordinary bending machines, which cannot be bent into shape on ordinary bending machines, or complex specially designed molds are used to complete the work. However, by controlling the depth of v-groove of the sheet metal, this special bending material can also be made by the general die on the ordinary bending machine. The specific method is: the last bending process of the V-groove remaining sheet thickness control in 0.3 mm, so that this bending process rebound Angle is very small, rectangular tube after forming will not rebound deformation.
4. Folded bend before the positioning of sheet metal bending length sizes of the material are shallow plane v-shaped slot, can be used in the folded bend bend before the predetermined bit length size, and then in the bending machine according to the score good V trough for bending in advance, so that we can ensure the bending length size accurate, can replace behind CNC bending machine function. Of course, the premise is that the positioning accuracy of v-shaped planer must reach ±0.05 mm.