The processing method for stamping andforging are plastic processing (or pressure processing), forging stamping blankcollectively. Is hot-rolled and cold-rolled steel sheet and strip. The world ofsteel, 60 ~ 70% is the plate, mostly made by stamping products. Automobilebody, chassis, tank, radiator, boiler drum, vessel shell, electric machine,electric iron core silicon steel sheet are stamping processing. Instruments,household appliances, bicycles, office machinery, household utensils and otherproducts, there are a large number of Stamping Parts stamping. Is powered byconventional or special punching equipment, make sheet metal in the molddirectly affected by the deformation force and deformation, thus A certainshape, size and performance of the product parts production technology. Thesheet metal, mold and equipment are the three elements of stamping. Temperaturedivided by stamping hot stamping and cold stamping. The former is suitable forhigh deformation resistance, sheet metal plasticity is poor; the latter wascarried out at room temperature, is commonly used in stamping method the sheetmetal plastic processing. It is (or pressure processing) one of the mainmethods, but also forming part of materials engineering. Stamping mold calledstamping die, or die. The die is the material (metal or non-metal) batchprocessing into the special tool stamping. Die is of vital importance in the inthe press, did not meet the requirements of the die, it is difficult to carryout production batch stamping die; no advanced, advanced stamping process cannot be achieved. The stamping process and die, stamping equipment and stampingmaterials to constitute three stamping processing Only when they combine witheach other can they get the stamping parts.
Stamping parts and castings, forgings, athin, uniform, light, strong character. Stamping can be produced from othermethods is difficult to manufacture with stiffeners, stamping parts stampingrib, rolling or burring of the workpiece, to improve its rigidity. Because ofthe use of precision molds, workpiece precision, and high repetition accuracy,specifications, can punch a hole nest, boss. Cold stamping generally no longercutting machining, or only a small amount of cutting. The hot stampingprecision and surface state below the cold stamping, but still better than thecasting, forging, machining less.
(1) Stamping processing is of highproduction efficiency, convenient operation, easy to realize mechanization andautomation. This is because the stamping dies and stamping equipment rely on tocomplete the processing, ordinary press trips per minute up to dozens of times,high pressure per minute up to hundreds or even thousands of times, and eachpress stroke you may get a red piece.
(2) The stamping die ensure the dimensionand shape precision stamping parts, and generally do not damage the surfacequality of stamping, and die life is generally longer, so the stamping quality,good interchangeability, "as like as two peas" feature.
(3) Stamping can press the processing sizerange is large, complex shape parts, such as a small clock stopwatch, large carrails, covering parts, stamping and material hardening effect of colddeformation, punching strength and stiffness are higher..
(4) Stamping generally without cuttingscrap generated, material consumption is less, and no other heating equipment,which is a kind of material saving, energy saving and processing, lower thecost of stamping parts.
Stamping is mainly according to the processof classification, can be divided into separation process and the formingprocess of two categories. The separation process also known as blanking, itspurpose is to make the stamping parts along the contour line must be separatedfrom the sheet, and guarantee the quality of the separation section (Table 1).The forming process is designed to make sheet metal in broken slab under thecondition of plastic deformation, the workpiece into the required shape andsize. In the actual production, often a variety of integrated process appliedto a workpiece. The blanking, bending, shear, tensile, bulging, spinning,correction is the main stamping process of several.