Stamping is a forming and processing method of workpieces of desired shape and size by applying external force to sheets, strips, pipes and profiles by means of presses and dies to cause plastic deformation or separation, including blanking, bending, and deep drawing. , forming, finishing and other processes. Stamping process and dies, stamping equipment and stamping materials constitute the three elements of stamping processing, and stamping parts can be obtained only when they are combined with each other. Precision metal stamping parts can be divided into various types according to industry, use and process characteristics.
1. What are the common precision metal stamping parts
1. Auto parts: mainly include automotive structural parts, automotive functional parts, automotive lathe parts, automotive relays, etc.
2. Electronic parts: mainly include connecting devices, connectors, brush parts, electrical terminals, elastic parts, etc.
3. Appliance parts: It mainly includes major appliance parts, such as color tube electron gun parts, as well as small appliance parts, various structural parts and functional parts.
4. IC integrated circuit lead frame: mainly includes discrete device lead frame and integrated circuit lead frame.
5. Motor core: mainly includes single-phase series motor core, single-phase household motor core, single-phase shaded-pole motor core, permanent magnet DC motor core, industrial motor core, plastic-encapsulated stator core, etc.
6. Electrical iron core: It mainly includes E-shaped transformer core, EI-shaped transformer core, I-shaped transformer core, and other transformer cores.
7. Heat exchanger fins: mainly include industrial heat exchanger fins, household heat exchanger fins, automotive heat exchanger fins, etc.
8. Other parts: mainly include instrumentation parts, IT parts, acoustic and camera parts, modern office parts, and daily hardware.
Second, the advantages of precision stamping processing
1. The production efficiency of stamping processing is high, the operation is convenient, and it is easy to realize mechanization and automation. This is because stamping relies on die and stamping equipment to complete the processing. The number of strokes of ordinary presses can reach dozens of times per minute, and the high-speed pressure can reach hundreds or even thousands of times per minute. May get a punch.
2. During stamping, since the die ensures the size and shape accuracy of the stamping parts, and generally does not destroy the surface quality of the stamping parts, and the life of the die is generally long, the stamping quality is stable, the interchangeability is good, and it has the "exactly the same". feature.
3. Stamping can process parts with a wide range of sizes and complex shapes, such as stopwatches as small as clocks, as large as automobile longitudinal beams, covering parts, etc., plus the cold deformation hardening effect of the material during stamping, the strength and stiffness of stamping are higher.
4. Stamping generally does not generate chips and debris, consumes less material, and does not require other heating equipment, so it is a material-saving and energy-saving processing method, and the cost of stamping parts is low.
3. Common problems of precision stamping processing
Common problems in metal stamping processing include: deformation, burrs, etc. of precision stamping parts; cracks, warpage, surface scratches, angular deformation, etc. of bending parts; flange wrinkles, deep drawing wall wrinkling, deep drawing Wall damage, cracking, etc.; flanging cracks, uneven bulging, etc.
Solutions to common problems: The mold design must have a reasonable punch and die gap value, fillet radius and machining accuracy. When designing a bending die, effective measures should be taken to reduce the springback, and the amount of springback should be subtracted from the die; reasonable rounded corners should be designed to prevent bending cracks. When deep drawing, use a blank holder to prevent wrinkling, and the pressure should be moderate; use appropriate lubrication to reduce the deep drawing resistance to prevent the die from sticking or pull through the workpiece; use professional stamping oil that meets the process requirements.
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