Stamping Parts with Stamping Press Selection

Stamping press selection is a critical decision that directly impacts the quality, efficiency, and cost of stamping parts, requiring careful consideration of part requirements (material, size, complexity), production volume, and budget. Choosing the wrong press can lead to poor part quality, high maintenance costs, or bottlenecks, while the right press ensures optimal performance and long-term reliability.

Key factors for selection include press type, tonnage, speed, and frame design. Press types include mechanical presses (for high-volume, repetitive stamping), hydraulic presses (for deep drawing or thick-material stamping), and servo presses (for precision, variable-speed operations). Mechanical presses are ideal for high-volume parts like washers (100,000+ units/hour), offering speeds up to 1000 strokes per minute. Hydraulic presses, with their uniform force distribution, are used for deep-drawn parts like metal cups or automotive fuel tanks, handling materials up to 20mm thick. Servo presses combine the speed of mechanical presses with the flexibility of hydraulic presses, adjusting stroke length and speed mid-operation—perfect for complex parts like smartphone chassis, which require both punching and bending.

Tonnage (press force) is determined by the part’s material and thickness: a 1mm steel sheet for electrical brackets may require a 50kN press, while a 10mm steel blank for truck frames needs a 2000kN press. Choosing insufficient tonnage causes incomplete forming, while excess tonnage wastes energy and accelerates mold wear. Speed is matched to production volume: low-speed presses (50-100 strokes/minute) for heavy parts, high-speed presses (300+ strokes/minute) for small, high-volume parts. Frame design (C-frame or straight-side) affects stability: C-frame presses are compact and cost-effective for small parts, while straight-side presses offer better rigidity for large, precision parts like automotive body panels.

A case study of an electronics manufacturer showed that selecting a 100kN servo press for smartphone connector stamping improved part precision (tolerances from ±0.03mm to ±0.01mm) and reduced energy use by 30% compared to a mechanical press. For stamping parts manufacturers, press selection is not just a purchase but a strategic investment, requiring collaboration between engineers, production teams, and suppliers to align press capabilities with part and volume needs.

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