Detailed Explanation Of Sheet Metal Process Acceptance Criterion
Sheet metal processing production: According to the basic processing of sheet metal parts, as expected, bending, stretching, forming, welding. This specification specifies the process requirements for each type of process. According to the different processing methods, the blanking can be divided into general punching, punching, shearing, cutting and cutting. Because of the different processing methods, the processing technology of cutting is different. Sheet metal cutting method is mainly a few red and laser cutting bending material bending, the rounded area on the outer layer received tensile, the inner layer is compressed.
When the material thickness is constant, the smaller the inner r, the more severe the tensile and compression of the material; when the outer round of the tensile stress exceeds the ultimate strength of the material, it will produce cracks and broken, so the structure of bending parts Design, should avoid too small bending fillet radius. Stretching: The radius of the fillet between the bottom of the tensile member and the straight wall should be greater than the thickness of the plate, ie r1 ≥ t.
In order to make the drawing more smoothly, generally take r1 = (3 ~ 5) t, the maximum fillet radius should be less than or equal to 8 times the thickness, that r1 ≤ 8t. Stretch pieces of stress due to the size of the different parts, so that the thickness of the material after stretching will change. In general, the bottom of the central to maintain the original thickness of the material at the bottom of the fillet thinner near the flange at the top of the thickening of the material, rectangular drawing around the rounded corners of the material thickening. Molding: in the sheet metal parts on the tendons, help to increase the structural rigidity, blinds are usually used for a variety of shell or chassis from the ventilation cooling effect, the molding method is to punch the edge of the material to cut , While the remainder of the punch deforms the material at the same time as the undulating shape of the opening. Welding welding methods are mainly arc welding, electroslag welding, gas welding, plasma arc welding, melting welding, pressure welding, brazing, sheet metal welding products mainly for arc welding, gas welding.