The first step is preliminary engineering preparation. Staff first review the 2D and 3D drawings provided by the client, conducting a manufacturability analysis based on precision, plating, and usage standards to mitigate production risks such as bending springback and burrs. Then, they design matching precision progressive dies or compound dies, and process the dies using techniques such as wire EDM and optical grinding. Simultaneously, they plan the stamping layout for blanking, bending, and shaping stations.
After die fabrication, the raw material pretreatment stage begins. Upon arrival at the warehouse, the metal coils are inspected for thickness, hardness, and surface condition, then slit and cut to the width suitable for the dies. The coils are then leveled to eliminate internal stress. The coils undergo ultrasonic degreasing to remove rolling oil stains. Elastic materials such as beryllium copper and phosphor bronze are annealed and softened as needed, and after drying and coating, surface scratches and oxidation are prevented.
The core process is high-speed precision continuous stamping, relying on a servo precision press and high-precision dies to complete multiple processing steps in one operation. First, the outer shape is cut through separation processes such as punching, blanking, and trimming. Then, the part structure is shaped through forming processes such as bending, stretching, flanging, and shaping. Strict control of mold gaps ensures stable dimensional accuracy. Finally, the carrier is cut to separate the finished product.
The stamped semi-finished products undergo multiple post-processing finishing steps. First, magnetic grinding and ultrasonic cleaning remove fine burrs. Some parts undergo secondary processing such as tapping and spot welding. Elastic stamped parts undergo aging heat treatment to improve resilience. Surface treatment processes such as galvanizing, gold plating, anodizing, and passivation are selected according to product requirements. After processing, pure water is used for cleaning and drying to avoid watermarks and corrosion risks.
All processed parts undergo comprehensive quality inspection and packaging before shipment. CCD vision equipment is used for full inspection of appearance defects, and a 2.5D image analyzer is used to inspect micron-level precision dimensions. Sampling is used to complete performance tests such as salt spray, conductivity, and elastic fatigue. After screening and distinguishing between good and defective products, they are sealed in anti-static and moisture-proof vacuum packaging before final warehousing and delivery.
