. Named after its inventor, German engineer Erich Erichsen, this testing machine plays a critical role in quality control, material selection, and research and development processes for metal-based products.

1. of a metal sheet under controlled conditions. The test measures the maximum depth to which a metal sheet can be stretched before it fractures or tears-a key indicator of how well the material will perform in forming processes like stamping, deep drawing, or bending.

2.The testing principle is straightforward yet precise:

• A circular metal specimen (typically with a standard diameter, e.g., 30mm or 50mm) is securely clamped between two dies to prevent slipping during deformation.
• A spherical or hemispherical punch (with a fixed diameter, usually 20mm) is driven into the center of the specimen at a constant speed.
• The punch applies force to stretch the metal until a visible crack or fracture appears on the surface of the deformed specimen.
• (or cupping value), measured in millimeters (mm), is recorded as the depth of the punch at the moment of fracture. A higher value indicates greater ductility and formability of the material.

1. : Two circular dies (upper and lower) that securely hold the specimen in place to prevent movement during deformation. The clamping force is adjustable to avoid specimen slippage without causing pre-deformation.
2. : A hardened steel punch with a smooth, spherical tip (standard diameter: 20mm) that applies the deformation force to the specimen.
3. : A motorized or manual system that moves the punch upward at a constant speed (typically 10mm/min, as specified by international standards).
4. : A precision gauge (e.g., digital or analog) that records the punch depth at the moment of fracture, providing the Erichsen Index value.
5. : Protective guards and emergency stop buttons to ensure operator safety during testing.

The Erichsen Cupping Test is governed by international standards to ensure consistency across industries and laboratories. Key standards include:

1. ISO 20482: "Metallic materials - Erichsen cupping test" (specifies test procedures, specimen dimensions, and equipment requirements).
2. ASTM E209: "Standard Test Method for Erichsen Cupping Test of Metallic Sheet" (used primarily in the United States).
3. DIN 50101: A historical German standard that originally defined the Erichsen test, still referenced in some regions.

These standards specify details such as specimen size (e.g., 30mm diameter, 0.1–3mm thickness), punch speed, clamping force, and measurement accuracy, ensuring reliable and comparable results.

1. : Evaluating sheet metals used in car body panels, chassis components, and structural parts to ensure they can withstand stamping and deep drawing processes.
2. : Testing aluminum and titanium alloys for aircraft components that require high ductility and resistance to deformation.
3. : Researching new alloys or heat treatment processes to optimize material formability.
4. : Inspecting incoming metal sheets to verify they meet formability requirements for production.

1). Maximum test force: 60kN

2). Test accuracy: cupping value accuracy ±0.01mm

3). Substrate thickness: 0.1-2mm

4). Cupping value accuracy: 0.01mm

5). Test speed: 5-10 mm/min

6). Punch die: Sφ20±0.05mm

7). Sample width: 90mm

8). Die inner diameter: φ33±0.1mm

9). Die inner diameter: φ27±0.05mm

10). Punch stroke: <=60mm

11). Clamping piston stroke: <=20mm

12). Hydraulic oil: N46 hydraulic oil

13). Dimensions: 760*700*1100mm

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