Knowledge analysis of brass plate deep stamping forming process industry

As an important alloy material with excellent ductility, electrical and thermal conductivity, corrosion resistance and unique metallic luster, brass plate occupies an irreplaceable position in the fields of electronics and electrical, hardware decoration and precision machinery manufacturing. Deep drawing forming is the core plastic forming technology in brass plate processing. Its essence is to use the synergy of precision molds and presses to gradually transform flat blanks into open hollow parts, or to further reshape the hollow parts in shape and size. In the modern electrical manufacturing industry chain, from Electrical Connector Socket Brass Stamping to various precision conductive components, the brass deep drawing process has always been the technical cornerstone to ensure product geometric accuracy and functional reliability. This process not only requires a deep understanding of material flow patterns but also requires systematic optimization in mold design, parameter control, and defect prevention to meet increasingly stringent industrial application standards.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The material properties of brass sheets are the core basis for determining the effect of deep stamping. The alloy composition, material heat treatment status and mechanical performance parameters will directly affect the stability of stamping processing and the final product qualification rate, adapting to the production needs of brass stamped switch terminal accessories of different specifications. Brass alloys with a reasonable ratio of copper and zinc are preferred for industrial deep drawing processing. The zinc content of H68 and H65 grades of brass is controlled in the range of 30%-35%. They have excellent cold-working plasticity and strong adaptability to grain deformation. They can meet the needs of deep drawing forming of complex structural workpieces and are common high-quality deep drawing base materials in the industry. Lead-containing brass such as HPb59-1 has outstanding cutting performance, but its plastic deformation ability is weak and its deep drawing tolerance rate is low.

 

It is only suitable for stamping workpieces with simple structures and is not suitable for the production of high-precision complex components. In terms of material state selection, the deep stamping process generally uses soft brass plates that have been fully annealed. The uniform and fine-grained structure, low yield strength and sufficient elongation can provide a guarantee for the maximum plastic deformation of the plate and effectively adapt to the processing needs of various special-shaped electrical stamping components. At the same time, the strain hardening index and thickness anisotropy coefficient of the material are key mechanical indicators. A higher strain hardening index can make the plate deform more uniformly and delay local necking problems. A higher thickness anisotropy coefficient can suppress the deformation in the thickness direction of the plate, promote the smooth flow of flat materials, and greatly increase the forming limit of the workpiece. In addition, the surface of the brass blank must be kept smooth and clean, without defects such as oxide scale, fine cracks, scratches, impurities, etc., to avoid stress concentration caused by defective locations during the stamping process, leading to quality problems such as cracking and poor appearance of the workpiece.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The complete brass plate deep drawing forming process is divided into four core stages. The material deformation characteristics and processing control focus of each stage are different, forming a standardized plastic processing system. In the initial forming stage, the punch slowly contacts the center of the brass blank. Under the action of slight pressure, small bending and tensile deformations occur in the center area of ​​the plate. At this stage, the pressing stroke needs to be accurately controlled to avoid local stress concentration in the plate. The main body forming stage is a key link in the entire process. The punch continues to move downward at a constant speed, prompting the brass material in the flange area of ​​the blank to continuously flow to the die hole, gradually forming a complete side wall of the workpiece. This stage has the fastest material flow rate and the most severe deformation. The flange area is easily prone to wrinkles due to stress imbalance and is the core area of ​​process control.

 

In the final stage of forming, the punch reaches the bottom dead center of the equipment, and the overall structure and size of the workpiece are basically finalized. At this time, the thickness of the sheet is most obvious at the position where the bottom of the side wall of the workpiece and the fillet of the punch fit together. This is a high-risk area for cracking defects in the finished product. Risks need to be avoided through early parameter optimization. Finally, entering the demoulding stage, the punch returns and resets, and the molded workpiece is smoothly ejected from the die with the help of the ejection device. For precision workpieces with complex structures and obvious rebound characteristics, it is necessary to match the reasonable demoulding slope and ejection force in advance to ensure that the workpiece is intact and not damaged. For brass stamping parts of electrical contact components with large depth and special-shaped structure, a single stamping cannot meet the forming requirements. A multi-pass deep drawing process is required, and an annealing treatment is added between the processes to eliminate the problem of material work hardening, restore the plasticity of the brass sheet, and ensure subsequent molding accuracy.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Brass plate deep drawing forming is a multi-disciplinary integrated technology spanning material science, plastic mechanics and mold engineering. Its successful implementation is based on a deep understanding of the physical and metallurgical properties of brass alloys, accurate calculation of the geometric parameters of the mold structure, and strict control of the stamping process window. In the actual industrial production environment, there are complex interactive coupling relationships between material properties, mold status and process conditions. Deviations in any single link may affect the quality of the final product through nonlinear amplification effects. Therefore, it is necessary to establish stable and controllable manufacturing process capabilities through rigorous process test design and multi-factor parameter optimization, in order to continuously produce deep-drawn brass parts that meet high-precision and high-consistency requirements. As electrical equipment evolves towards miniaturization and high power density, precision components such as Electrical Contact Assemblies Brass Stamped Parts and Stamping Riveting Electrical Brass Press Parts have put forward higher requirements for the extreme forming capabilities of the deep drawing process, driving the industry to continuously achieve technological breakthroughs in the fields of mold materials, surface treatment technology and intelligent process monitoring.

 

 

Relying on mature mold design capabilities, material adaptation experience and a full-process control system, we are able to provide customers with customized Brass Sheet Metal Components solutions from drawings to finished products, ensuring that products meet stringent industry standards in terms of conductivity, dimensional stability and batch consistency. Welcome to contact us for specific application needs and jointly promote the technology upgrade and cost optimization of electrical metal stamping components.