One article understanding: Metal forming parts forming, structural design, and surface treatment

Stamping is a Custom metal stamping parts processing method that relies on a press and mold to apply external force to sheet, strip, pipe, etc., causing them to undergo plastic deformation or separation, thereby obtaining a specified shape, size, and performance. According to the process objectives, stamping is mainly divided into two categories: separation process and forming process. The separation process, represented by punching, includes cutting, punching, shearing, edge cutting, etc., to separate the material along the set contour and ensure the quality of the cross-section.

The forming process of Sheet metal stamping includes bending, deep drawing, flanging, necking, bulging, spinning, shaping, etc. It achieves plastic deformation without damaging the material and completes the processing of various hollow, curved, and complex structural parts. The punching process is usually divided into three stages: elastic deformation, plastic deformation, and fracture separation. The cross-sectional quality is directly affected by mold clearance, material properties, and punching parameters.

The design of Metal forming parts directly affects the quality of forming, production efficiency, and cost, and needs to follow the principles of stability, reliability, and ease of processing. Punched parts should have simple and symmetrical shapes as much as possible, reduce waste, avoid sharp corners and use rounded transitions; The punching hole diameter, hole spacing, hole edge distance, cantilever and groove width should be reasonable and not too small to avoid Precision metal stamping cracking, deformation or mold damage. The design of deep drawn parts should consider the material flow law, choose one or multiple deep draws reasonably, distinguish between ordinary deep drawing and thinning deep drawing, and prevent wrinkling and tearing. In terms of overall structural design, priority should be given to arc transition, ensuring sufficient hole spacing and bending height. Thin plates can be reinforced with ribs to enhance stiffness and strength, and the influence of fiber direction on forming should be fully considered.

Progressive die stamping typically requires surface treatment after molding to enhance rust prevention, wear resistance, aesthetics, and service life. The mainstream processes include electroplating, electrophoresis, blackening, galvanizing, phosphating, spraying, baking paint, passivation, etc. Electroplating can deposit metals such as zinc, copper, chromium, nickel, tin, gold, silver, etc. on the surface to enhance corrosion resistance, hardness, conductivity, and appearance; The electrophoretic coating is uniform and dense, with better adhesion, corrosion resistance, and impact resistance than the conventional coating of Progressive die heavy metal stamping. Blackening, also known as bluing, forms a dense protective film on the surface of steel through oxidation and is commonly used for rust prevention; Galvanizing and tin plating are mainly used for protection and decoration, and are widely used. Phosphating is mainly used for corrosion prevention and improving coating adhesion, and can also play a role in reducing friction and lubrication during cold processing. Spraying and baking paint are mainly used for protection and appearance, while passivation achieves long-term anti-corrosion by forming a dense oxide film.

Reasonable stamping process and structural design can improve material utilization, reduce production costs, and enhance batch stability while ensuring accuracy and strength. The adapted surface treatment can significantly extend the service life of Die metal stamping, adapting to different working conditions such as humidity, corrosion, high temperature, friction, etc. From structural forming to surface protection, both determine the reliability, applicability, and economy of stamped parts, and are key links that cannot be ignored in product development in industries such as machinery, automotive, electronics, and home appliances.

Scientific stamping design and surface treatment are key to improving product accuracy, lifespan, and reliability. Our company specializes in providing customized processing of various precision Metal forming parts, supporting drawings and samples. Please feel free to inquire.