Stamping manufacturing process

1. Determine the amount of deformation compensation according to the material, product structure, etc. 2. According to the compensation amount, the die is designed to punch out finished or semi-finished products. 3. Process semi-finished products to finished products. 4. Unfavorable phenomena include cracks, wrinkles, strains, uneven thickness, non-forming, etc. Tapping and thread processing: 1. The internal thread first drills the bottom hole diameter and depth (the bottom hole size is determined by the thread specification); the external thread is first processed to the outer circle to the large diameter of the thread (the size is determined according to the thread specification). 2. Thread processing: internal thread tapping with corresponding grade tap; external thread turning with thread cutter or die sleeve threading. 3. Unfavorable phenomena include random threads, non-uniform dimensions, unqualified thread gauge inspection, etc. The materials are mainly selected from metals or non-metals with low deformation resistance, good plasticity, and good ductility such as copper, aluminum, and low carbon steel according to the requirements of use. Stamping parts are formed by applying external force to plates, strips, pipes and profiles by means of presses and dies to produce plastic deformation or separation, so as to obtain workpieces (stamping parts) of the required shape and size. Stamping and forging are both plastic processing (or pressure processing), collectively referred to as forging. The blanks to be stamped are mainly hot-rolled and cold-rolled steel plates and strips. Stamping parts are mainly formed by stamping metal or non-metal sheet materials with the pressure of a press machine through stamping die. It mainly has the following characteristics: ⑴ Stamping parts are manufactured by stamping under the premise of low material consumption. , Its parts are light in weight, good in rigidity, and after the sheet metal is plastically deformed, the internal structure of the metal is improved, so that the strength of the stamping parts is increased. ⑵The stamping parts have high dimensional accuracy, the same size as the mold parts, and good interchangeability. No further machining is required to meet general assembly and use requirements. ⑶ Stamping parts in the stamping process, because the surface of the material is not damaged, so it has a good surface quality, smooth and beautiful appearance, which provides convenient conditions for surface painting, electroplating, phosphating and other surface treatments. Stamping parts are the production technology of using the power of conventional or special stamping equipment to directly subject the sheet metal to the deformation force and deform in the mold, so as to obtain product parts with a certain shape, size and performance. Sheet materials, molds and equipment are the three elements of stamping processing. Stamping is a method of metal cold deformation processing. Therefore, it is called cold stamping or sheet metal stamping, or stamping for short. It is one of the main methods of metal plastic processing (or pressure processing), and it also belongs to material forming engineering technology. Among the steel products of Universal, 50-60% are made of plates, and most of them are finished products made by pressing. Car bodies, radiator fins, steam drums of steam boilers, container shells, motors, electrical iron core silicon steel sheets, etc. are all stamped and processed. There are also a large number of stamping parts in products such as instruments, household appliances, office machines, and storage utensils. Stamping is an efficient production method. It adopts compound molds. The exception is a multi-station progressive mold. Multiple stamping technology operations can be completed on one press to complete the automatic generation of materials. The production speed is fast, the rest time is long, the production cost is low, and the collective can produce hundreds of pieces per minute, which is loved by many processing plants. Compared with castings and forgings, stamping parts have the characteristics of thinness, uniformity, lightness and strength. Stamping can produce workpieces with reinforcing ribs, ribs, buckling or flanges that are difficult to manufacture by this skilled hand to improve its rigidity. Due to the rejection of rough molds, the precision of the workpiece can reach the micron level, and the precision is high, the specifications are consistent, and holes, bosses, etc. can be punched out. In actual production, process tests similar to the stamping process are commonly used, such as drawing performance test, bulging performance test, etc. to test the stamping performance of the material to ensure the quality of the finished product and a high pass rate. In addition to the hydraulic press for forming thick plates, the stamping equipment usually adopts a stagnant press. Focusing on the current high-speed multi-station stagnation press, set up equipment configuration decoiling, finished product collection, transportation and other stagnation, as well as mold library and quick mold change placement, and use the computer French tube bundle to form a passive stamping production with high production rate and high production rate. line. Under the condition of producing dozens or hundreds of stamping parts every minute, the stamping and outputting processes are completed in a short period of time, and personal, equipment and quality incidents often occur. Therefore, the safety of stamping is a very important issue. Related news: The characteristics of the main materials of stamping parts, the treatment of common problems of stamping parts, the characteristics of scaffolding stamping parts and the importance of inspections