Sheet Metal Stamping Die Metal Parts Bending And Drawing Stamping Dies

I. Material Property Adaptation Specifications

Die design must accurately match the characteristics of the stamping material, avoiding blind design. For different materials (cold-rolled steel, stainless steel, aluminum alloy, high-strength steel), their hardness, ductility, and modulus of elasticity parameters must be clearly defined, and corresponding stamping process parameters should be formulated. For example, SKD11 die steel should be selected for stamping 304 stainless steel, and the blanking clearance should be optimized for stamping 6061 aluminum alloy. The die cutting edge hardness and structural layout should be determined according to the material parameters to ensure accurate stamping, control die wear within a reasonable range, and extend the die's service life.

II. Blanking Surface and Clearance Design Specifications

The blanking surface design must strictly follow practical standards. The blanking cutting edge must be sharp and free of chipping, with a surface roughness Ra≤0.025μm to ensure a smooth cut on the stamped part. The chamfer on the blanking surface should be set according to the material thickness, with a chamfer radius of 0.3-0.8 times the material thickness to reduce burrs on the stamped part and avoid material tearing. The blanking clearance needs to be precisely calculated and set at 4%-8% of the material thickness, with a deviation ≤0.003mm. Excessive clearance can easily lead to warping of the stamped parts and material waste, while insufficient clearance exacerbates mold wear. It must be precisely determined based on material properties and the stamping process.

III. Mold Structure Design Specifications

The mold structure design must balance mechanical stability and ease of maintenance. The mold base is made of high-strength alloy steel, with a hardness controlled at HRC58-62 after heat treatment to ensure overall rigidity, prevent mold deformation during stamping, and ensure machining accuracy ≤±0.005mm. The parting surface design must avoid critical parts of the stamped parts to ensure smooth parting without jamming. The unloading system uses an elastic stripper plate with appropriate spring force to ensure thorough unloading and improve production efficiency. A modular structure is also designed to facilitate daily maintenance, replacement of vulnerable parts, and mold debugging.

IV. Safety Design Specifications

The mold design must strictly comply with national mechanical safety standards and implement safety protection measures. Protective baffles are installed at the die's inlet and outlet to prevent workpieces from ejecting and injuring personnel during stamping. An emergency stop linkage device is installed, linked to the stamping equipment, allowing for rapid shutdown in case of abnormalities. The die structure design must avoid sharp edges, and protective covers are installed at operating areas to prevent mechanical injuries to operators and ensure production safety.