What are the common problems in processing precision metal stamping parts?
by：Foxron
2021-09-30
Stamping is a forming processing method that relies on presses and dies to apply external force to plates, strips, pipes and profiles to cause them to be plastically deformed or separated, so as to obtain the required shape and size of the workpiece, including punching, bending, and deep drawing , Forming, finishing and other processes. The stamping process and die, stamping equipment and stamping materials constitute the three elements of stamping processing. Only when they are combined can stamping parts be obtained. With the development of the hardware industry, the production equipment and technology of metal stamping parts are constantly improving, and the metal stamping parts are becoming more and more sophisticated. Precision metal stamping parts can be divided into many types according to industry, use and process characteristics.
1. What are the common precision metal stamping parts?
1. Automobile parts: mainly include automobile structural parts, automobile functional parts, automobile lathe parts, automobile relays, etc.
2. Electronic parts: mainly include connecting devices, connectors, brush parts, electrical terminals, elastic parts, etc.
3. Home appliance parts: Mainly include major home appliances parts, such as color tube electron gun parts, small home appliances parts, various structural parts and functional parts, etc.
4. IC integrated circuit lead frame: mainly includes discrete device lead frame and integrated circuit lead frame, etc.
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 stator core Wait.
6. Electrical iron cores: mainly include E-shaped transformer cores, EI-shaped transformer cores, I-shaped transformer cores, and other transformer cores.
7. Heat exchanger fins: mainly include industrial heat exchanger fins, household heat exchanger fins, and automobile heat exchanger fins.
8. Other parts: mainly include instrument and meter parts, IT parts, acoustic and camera parts, modern office parts, and daily hardware.
Two, the advantages of precision stamping processing
1. The stamping process has high production efficiency, convenient operation, and easy realization of mechanization and automation. This is because stamping relies on punching dies 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 stamped part.
2. When stamping, because the mold guarantees the size and shape accuracy of the stamping parts, and generally does not damage the surface quality of the stamping parts, and the life of the mold is generally longer, the quality of the stamping is stable, and the interchangeability is good. 'Exactly the same' feature.
3. Stamping can process parts with a large size range and more complex shapes, such as stopwatches as small as clocks and clocks, as large as automobile longitudinal beams, covering parts, etc., plus the cold deformation and hardening effect of the material during stamping. Both strength and rigidity are high.
4. Stamping generally does not generate chips and scraps, 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 lower.
Three, common problems of precision stamping processing
Common problems in metal stamping processing include: deformation, burrs, etc. of precision stamping parts; cracks, warping, surface scratches, corner deformations of bent parts, etc.; flange wrinkles of deep-drawn parts, and deep-drawn wall wrinkles , Deep drawing wall damage, tearing, etc.; flanging cracks, uneven bulging, etc.
Solutions to common problems: The mold design must have a reasonable gap between the convex and concave molds, the fillet radius, and the processing 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 mold; reasonable rounded corners should be designed to prevent bending cracks. When drawing, use a blank holder to prevent wrinkles, and the pressure should be moderate; use proper lubrication to reduce the drawing resistance to prevent the mold from sticking or make the workpiece pull through; use the professional stamping oil that meets the process requirements.
1. What are the common precision metal stamping parts?
1. Automobile parts: mainly include automobile structural parts, automobile functional parts, automobile lathe parts, automobile relays, etc.
2. Electronic parts: mainly include connecting devices, connectors, brush parts, electrical terminals, elastic parts, etc.
3. Home appliance parts: Mainly include major home appliances parts, such as color tube electron gun parts, small home appliances parts, various structural parts and functional parts, etc.
4. IC integrated circuit lead frame: mainly includes discrete device lead frame and integrated circuit lead frame, etc.
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 stator core Wait.
6. Electrical iron cores: mainly include E-shaped transformer cores, EI-shaped transformer cores, I-shaped transformer cores, and other transformer cores.
7. Heat exchanger fins: mainly include industrial heat exchanger fins, household heat exchanger fins, and automobile heat exchanger fins.
8. Other parts: mainly include instrument and meter parts, IT parts, acoustic and camera parts, modern office parts, and daily hardware.
Two, the advantages of precision stamping processing
1. The stamping process has high production efficiency, convenient operation, and easy realization of mechanization and automation. This is because stamping relies on punching dies 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 stamped part.
2. When stamping, because the mold guarantees the size and shape accuracy of the stamping parts, and generally does not damage the surface quality of the stamping parts, and the life of the mold is generally longer, the quality of the stamping is stable, and the interchangeability is good. 'Exactly the same' feature.
3. Stamping can process parts with a large size range and more complex shapes, such as stopwatches as small as clocks and clocks, as large as automobile longitudinal beams, covering parts, etc., plus the cold deformation and hardening effect of the material during stamping. Both strength and rigidity are high.
4. Stamping generally does not generate chips and scraps, 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 lower.
Three, common problems of precision stamping processing
Common problems in metal stamping processing include: deformation, burrs, etc. of precision stamping parts; cracks, warping, surface scratches, corner deformations of bent parts, etc.; flange wrinkles of deep-drawn parts, and deep-drawn wall wrinkles , Deep drawing wall damage, tearing, etc.; flanging cracks, uneven bulging, etc.
Solutions to common problems: The mold design must have a reasonable gap between the convex and concave molds, the fillet radius, and the processing 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 mold; reasonable rounded corners should be designed to prevent bending cracks. When drawing, use a blank holder to prevent wrinkles, and the pressure should be moderate; use proper lubrication to reduce the drawing resistance to prevent the mold from sticking or make the workpiece pull through; use the professional stamping oil that meets the process requirements.
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