Stamping is a forming process in which external forces are applied to plates, strips, tubes and profiles by means of presses and dies to produce plastic deformation or separation to obtain workpieces of the required shape and size, including punching, bending, drawing, forming and finishing processes. Stamping process and die, stamping equipment and stamping materials constitute the three elements of stamping processing, only their mutual combination can yield stamping parts. With the development of the hardware products industry, hardware stamping production equipment and technology are constantly improving, and hardware stamping parts are becoming more and more precise. Precision hardware stamping parts can be divided into various types according to industry, usage and process characteristics.
- What are the common precision hardware stamping parts
1.1 Auto parts: mainly contains auto structural parts, auto functional parts, auto lathe parts, auto relays, etc.
1.2 Electronic parts category: mainly contains connecting devices, connectors, electric brush parts, electrical terminals, elastic parts, etc.
1.3 home appliance parts: mainly contains large home appliance parts, such as color tube electronic gun parts, and small home appliance parts, all kinds of structural and functional parts, etc.
1.4.IC integrated circuit lead frame: mainly contains discrete device lead frame and integrated circuit lead frame, etc.
1.5 Motor cores: mainly containing single-phase series-excited motor cores, single-phase household motor cores, single-phase shaded-pole motor cores, permanent magnet DC motor cores, industrial motor cores, plastic stator cores, etc.
1.6 Electrical cores: mainly contain E-shaped transformer cores, EI-shaped transformer cores, I-form transformer cores, and other transformer iron chips, etc.
1.7 Heat exchanger fins: mainly including industrial heat exchanger fins, household heat exchanger fins, automotive heat exchanger fins, etc.
1.8 Other parts: mainly including instrumentation parts, IT parts, acoustic and camera parts, modern office parts, and daily hardware, etc.
- Advantages of precision stamping processing
2.1 Stamping is highly productive and easy to operate, and can be easily mechanized and automated. This is because stamping relies on punching die and stamping equipment to complete processing, the number of strokes of ordinary presses can reach dozens of times per minute, high-speed pressure can reach hundreds of times per minute or even more than a thousand times, and each stamping stroke may get a punching part. Hong Ao precision in the machine processing for more than ten years, with quality processing team, quality machinery industry suppliers, add WeChat to the picture offer.
2.2 When stamping, as the mould ensures the size and shape accuracy of the stamped parts and generally does not damage the surface quality of the stamped parts, and the life of the mould is generally long, so the quality of the stamped parts is stable and interchangeable, and it has the characteristic of “one mould is the same”.
2.3 Stamping can produce parts with a large range of sizes and complex shapes, such as stopwatches for clocks and watches, longitudinal beams for automobiles, coverings, etc. In addition to the cold deformation and hardening effect of the material during stamping, the strength and rigidity of stamping are higher.
2.4 Stamping is generally free of chips and scraps and consumes less material, and does not require other heating equipment.
- Common problems of precision stamping
The common problems of hardware stamping processing include: deformation and burr of precision stamping parts; crack, warpage, surface abrasion and corner deformation of bending parts; flange wrinkling, wrinkling of drawing wall, damage of drawing wall and pulling crack of deep-drawn parts; crack of flanging and uneven expansion etc.
Solutions to common problems: The mould design should have reasonable clearance value of convex and concave moulds, radius of rounded corners and machining accuracy, etc. When designing the bending die, take effective measures to reduce the springback and subtract the amount of springback from the die; design reasonable rounded corners to prevent bending cracks. When drawing deeper, use crimping ring to prevent wrinkling, and the pressure should be moderate; reduce the resistance of drawing deeper with proper lubrication to prevent the mould from sticking or making the workpiece pull through; use professional stamping oil that meets the requirements of the process.