久久精品免费一区二区,色综合久久中文娱乐网,熟妇人妻videos,成人做爰高潮尖叫声免费观看

   Stamping is a forming and processing method that relies on a press and mold to apply external forces to plates, strips, pipes, and profiles, causing plastic deformation or separation, in order to obtain the required shape and size of workpieces (stamped parts). Stamping and forging belong to plastic processing (also known as pressure processing), collectively known as forging. The stamping blanks are mainly hot-rolled and cold-rolled steel plates and strips. 60% to 70% of the world's steel is made of sheet metal, most of which is stamped into finished products. The body, chassis, fuel tank, radiator, boiler drum, container shell, iron core silicon steel sheets of motors and electrical appliances of automobiles are all stamped and processed. There are also a large number of stamping parts in products such as instruments, household appliances, bicycles, office machinery, and household utensils.

   Stamping processing is a production technology that utilizes the power of conventional or specialized stamping equipment to directly deform the sheet metal in the mold, thereby obtaining a certain shape, size, and performance of product parts. Sheet metal, molds, and equipment are the three elements of stamping processing. According to the stamping processing temperature, it is divided into hot stamping and cold stamping. The former is suitable for sheet metal processing with high deformation resistance and poor plasticity; The latter is carried out at room temperature, which is a commonly used stamping method for thin plates. It is one of the main methods of metal plastic processing (or pressure processing) and also belongs to material forming engineering technology.

   The mold used for stamping is called a stamping die, abbreviated as a stamping die. Stamping dies are specialized tools that process materials (metal or non-metal) in bulk into the required stamping parts. Stamping dies are crucial in stamping, and without qualified dies, mass stamping production is difficult to carry out; Without a stamping die, the stamping process cannot be achieved. The stamping process, molds, stamping equipment, and stamping materials constitute the three elements of stamping processing, and only when they are combined can stamping parts be obtained.

   Processing characteristics:

   Compared with castings and forgings, stamped parts have the characteristics of being thin, uniform, light, and strong. Stamping can produce workpieces with reinforcing ribs, ribs, undulations, or flanges that are difficult to manufacture by other methods to improve their rigidity. Due to the use of precision molds, the workpiece accuracy can reach the micrometer level, with high repeatability and consistent specifications, and can be punched out with holes, protrusions, etc. Cold stamped parts generally do not undergo cutting or require only a small amount of cutting. The precision and Surface states of hot stamping parts are lower than those of cold stamping parts, but they are still better than castings and forgings, with less machining.

   Stamping is an efficient production method that uses composite molds, especially multi-station progressive molds, to complete multiple stamping processes on a single or multi-station press, achieving fully automatic production from strip uncoiling, leveling, punching to forming and finishing. High production efficiency, good labor conditions, low production costs, typically producing hundreds of pieces per minute& Emsp; Compared with other methods of mechanical processing and plastic processing, stamping processing has many unique advantages in both technical and economic aspects. The main manifestations are as follows.

   (1) The production efficiency of stamping processing is high, and the operation is convenient, making it easy to achieve mechanization and automation. This is because stamping relies on dies and stamping equipment to complete the processing. The number of strokes of a regular press can reach tens of times per minute, and high-speed pressure can reach hundreds or even thousands of times per minute. Moreover, each stamping stroke may result in a stamping part.

   (2) During stamping, because the die ensures the size and shape accuracy of the stamping part, and generally does not damage the surface quality of the stamping part, and the life of the die is generally long, the stamping quality is stable, the interchangeability is good, and the stamping is "exactly the same".

   (3) Stamping can process parts with a wide range of dimensions and complex shapes, such as small stopwatches for clocks, large car longitudinal beams, covers, etc. In addition to the cold deformation hardening effect of the material during stamping, the strength and stiffness of stamping are both high.

   (4) Stamping generally does not generate chips or debris, resulting in less material consumption and no need for other heating equipment. Therefore, it is a material saving and energy-saving processing method, and the cost of stamping parts is relatively low.

   Due to its superiority, stamping processing has a wide range of applications in various fields of the national economy. For example, stamping processing is available in departments such as aerospace, aviation, military industry, machinery, agricultural machinery, electronics, information, railways, postal and telecommunications, transportation, chemical engineering, medical equipment, daily appliances, and light industry. Not only does the entire industry use it, but everyone is directly connected to stamping products. There are many large, medium, and small stamping parts on airplanes, trains, cars, and tractors. The body, frame, and rim of a small car are all stamped and processed. According to relevant surveys and statistics, 80% of bicycles, sewing machines, and watches are stamped parts; 90% of the TV, radio, and camera components are stamped parts; There are also food metal tank shells, steel precision boilers, enamel bowls and stainless steel tableware, all of which are stamped and processed products using molds; Even the hardware of a computer cannot lack stamping parts.