The effect of sheet metal stamping to cold

Steel plate thickness tolerance of steel plate thickness tolerance error refers to the deviation of the actual thickness of steel plate more than standard allows not only does it affect parts stamping craze, surface wrinkle and springback parts, even may cause significant mold accident. This is one of the stamping effect of the three elements of success or failure. The size of the steel plate thickness tolerance fluctuations, actually affect the size of the pressure on the mould for parts, metal flow easily, thus affecting parts stamping cracking and wrinkling. Surface defects of steel plate by the regulation, the surface of hot rolled steel sheet must not have crack, such as layering and interlayer, folding, bubble, buckle and the use of harmful defects. There is but the depth, Or height) No more than half the thickness tolerance of pitting, sag, mild and partial defects such as scratches, and to ensure that the minimum thickness of steel plate. The existence of any surface defects of cold rolled and hot rolled steel plate, especially beyond the surface defects of standard, will be affected parts stamping craze, paint quality and appearance quality of car body directly. The chemical composition of steel ( 1) Carbon. Carbon is one of the most basic elements in steel, it increases the strength of the steel plate, especially the tensile strength. ( 2) Silicon. Silicon can improve the strength of the cold rolled steel sheet. ( 3) Manganese. Peroxide can prevent steel and cold rolled steel plate edge to avoid cracks of favorable effect. ( 4) Phosphorus. Good in annealing function. But phosphorus have cold brittleness, have an adverse effect on the welding performance also. ( 5) Sulfur. Stamping of harmful elements. ( 6) Aluminum. To prevent steel aging, as deoxidizer, beneficial to deep drawing performance.