Stamping operations commonly used material requirements

Classification and name plate plate refers to various shapes of semi-finished products, such as: plate, medium plate, plate, narrow strip, strip, etc. According to the thickness of the points: thick plate ( More than 4 mm) , medium plate ( 3 - 4毫米) Sheet ( Below 3 mm) According to the rolling state points: hot rolled steel plate, cold rolled steel sheet alloy and alloy steel we usually used is actually iron carbon alloy steel, carbon in iron base to form solid solution, according to how much carbon, can be divided into low, medium and high three kinds of carbon steel. Alloy steel is iron base of infiltration or solid solution with other metal elements, thus improved the plasticity of steel, such as sheet metal, 08 Al Al, Fe alloy, with such a combination, sheet of plastic to improve greatly, can adapt to cold stamping deformation. 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. Good surface quality. The material surface should be bright and clean level off, without stratification and mechanical properties of the injury, no rusty spot, scale and other attached objects. The thickness of the strict size tolerance. Material thickness tolerance should comply with the provisions of the state standard. Excellent deep drawing performance. Materials should be: good plasticity, QuQiang than small, big thickness direction coefficient, the material yield limit and elastic modulus of cold-formed steel used in cold stamping process of sheet metal cold rolled sheet mostly. Cold rolled sheet for board face level off, high dimensional accuracy and get the favour of cold stamping. Owing to the different countries and regions, the sheet name ( Or brand) Vary wildly, but its organizational structure and the physical and chemical properties are the same. At present, the grades are used in the stamping workshop St series, such as: St13, St14, St16, etc. The same type of material will be different because the stamping performance, continue to segmentation. Generally can be divided into F, HF, ZF level; F, H and Z respectively Chinese pinyin complex level, is very complex, the first letter of the most complex level, be clear at a glance. Level for complex stamping parts, respectively, levels is complex stamping parts and the most complicated stamping parts. More St series plate with our country 08 al sheet series performance in general is the same, in essence is 08 al series of ultra-low carbon steel.