Sheet metal shrinkage and bending roll order relations

Sheet metal shrinkage and bending roll order relations. Automotive body panels in the local force after extrusion, collision between metal lattice distortion faulted to the degree of plastic deformation, thus form convex concave, warp stretching deformation, etc. Stretching part thickness thinning, fishing area increased. In order to make the deformation of the parts back to its original shape, because the parts limited by border ( If the door) , be hitting flat method with sheet metal tapping on the stretch, it must be part of the other to find a way to expand the narrow. Which make the parts, metal parts expand ding then narrow repair method, called plastic plastic shrinkage method. Shrinkage method in auto plastic repair, plays a more important role, this process because it is a stereotype, the process is: the use of welding torch flame will assert convex or concave point ( The stretching center) Heated to fuchsia, but pay special attention not to melt components. The size of the heating range, according to the degree of stretch. Stretching degree is serious, larger area, heating range is larger, the general area in 15 - diameter Between 30 mm, stretching degree is slight, the area is lesser, heating range to small, usually in 7 - area diameter 15mm。 Around the area of the liquid is heated rapidly tapping, and gradually to the hot spots in a heart surrounded by forcing metal tissue contraction. Application suitable for seat (when knock Mat iron) In parts of the back, with a wooden hammer percussion, the hammer tapping the leveling of the reoccupy after cooling. This article reprinted from laser cutting machine