+86 0769 86066062 info@kehuimold.com
Select Page

Types of Stamping, Stretching and Forming Process

“Types of Stamping, Stretching and Forming Processes” refer to a range of manufacturing techniques used to shape sheet metal and other materials through mechanical deformation. These processes include:

  • Stamping (e.g., blanking, piercing) – Cuts or forms sheet metal using dies and presses.
  • Stretching (e.g., stretch forming, hydroforming) – Expands material over molds to create smooth contours.
  • Forming (e.g., deep drawing, roll forming) – Bends or reshapes material into 3D geometries.
Order Your Project
Stretching and Forming Process

Types of Stamping, Stretching and Forming Processes

Category

Process

Description

Materials

Tooling

Tolerance

Applications

Advantages

Limitations
Stamping Blanking Cuts flat shapes from sheet metal Steel, Aluminum, Copper Punch & Die ±0.1-0.5mm Electrical contacts, washers High-speed production Limited to 2D shapes
Piercing Creates holes in sheet metal / / / Ventilation panels, brackets / Burr formation possible
Fine Blanking Precision blanking with smooth edges / Triple-action press ±0.025mm Gears, precision components Excellent edge quality Higher tooling costs
Stretching Stretch Forming Sheet stretched over die while clamped at edges Aerospace alloys Stretch press ±0.5-1mm Aircraft skins, auto body panels Smooth surfaces Limited to convex shapes
Hydroforming Fluid pressure forms metal against die Aluminum, Stainless steel Hydraulic press ±0.2mm Bicycle frames, exhaust systems Complex geometries possible High equipment cost
Forming Deep Drawing Pulls sheet metal into die cavity to form cups/cylinders Mild steel, Brass Draw dies ±0.1-0.3mm Cans, sinks, automotive fuel tanks Good for high-volume production Wrinkling/thinning risks
Roll Forming Continuous bending through successive rollers / Roll stands ±0.5mm Gutters, metal roofing Excellent for long parts Limited cross-section changes
Incremental Forming Localized deformation via CNC-controlled tool / CNC machine ±0.2mm Prototypes, custom medical implants No dedicated dies needed Slow for mass production
Special Explosive Forming Uses controlled explosions to form metal High-strength alloys One-time dies ±1mm Large marine/defense components Extreme shapes possible Safety/environmental concerns
Electromagnetic Forming High-speed forming using magnetic fields Conductive metals Coil tools ±0.1mm Automotive crash components No contact/no wear Limited to conductive materials

Key Characteristics

  1. Stamping – Best for high-volume, precision 2D parts
  2. Stretching – Ideal for large, smooth-curved surfaces
  3. Forming – Versatile for 3D shapes at various scales
  4. Special Processes – Solve unique challenges (size/material limitations)

Material Considerations

  • Aluminum: Excellent for stretch forming

  • High-strength steel: Requires higher tonnage

  • Copper: Good electrical/thermal applications

Process Selection Factors

  • Volume: Stamping for mass production

  • Complexity: Hydroforming/explosive forming for intricate shapes

  • Budget: Incremental forming for prototypes

Get In Touch

Our senior sales and technical engineers will answer you questions fast and efficient.

15 + 13 =