Sheet Metal Bending Forming Processing
01, After bending, there will be metal material bulges on both sides of the folded corner of the sheet metal due to extrusion, resulting in a width larger than the original size. The bulge size is related to the material thickness. The thicker the material, the larger the bulge point. In order to avoid this phenomenon, a semicircle can be made on both sides of the bending line in advance. The semicircle diameter should preferably be more than 1.5 times of the material thickness. The same method can be used in the reverse folding design of edge materials.
02, During sheet metal bending, the internal R angle should be greater than or equal to 1 / 2 of the material thickness. If the R angle is not made, the right angle will gradually disappear after multiple stamping and naturally form the R angle. After that, the length of one or both sides of the R angle will be a little longer.
03, The sheet metal is easy to deform after bending. In order to avoid deformation, an appropriate amount of 45 degree angle reinforcement can be added at the bending position to increase its strength on the principle of non-interference with other parts
04,Generally, when the sheet metal part is long and narrow, it is not easy to maintain its straightness, and it is easier to deform after being subjected to force. Therefore, we can fold one L-shape or two edges into a ㄇ shape to maintain its strength and straightness, but often the L and ㄇ shapes cannot be connected from head to tail. What should we do when they are interrupted due to some factors? At this time, we can play an appropriate amount of ribs to increase its strength
05,The turning point between the plane and the bending surface is better to have a narrow hole or an edge opening. Otherwise, burrs will be generated. The width of the narrow hole is better than or equal to 1.5 times of the plate thickness. Don't forget to mark the R angle when drawing. The male and female dies with 90 degree angles and acute angles are easy to crack. Once the line is stopped, the die repair will be lost.
06,At the corner of the plate edge of the metal sheet, if it is not required to be 90 degrees, please be sure to treat it as an appropriate R angle, because the right angle at the edge of the metal sheet is easy to cause sharp points and cut personnel. In terms of the master mold, the tip of the right angle is easy to crack due to stress concentration, and the male mold is easy to crack at the tip, so that the mold must be repaired to delay mass production. Even if there is no crack, it will wear and form an R angle over time, resulting in rough edges and defective products.
