Erichsen Cupping Testing Machine

About Erichsen Cupping Testing Machine

A Erichsen Cupping Testing Machine is a precision sheet metal testing instrument used to evaluate the ductility, formability, and deep drawing characteristics of metal sheets and strips. It determines the ability of a material to withstand deformation without cracking during pressing or forming operations.

This machine is widely used in sheet metal industries, automotive manufacturing, metallurgical laboratories, paint coating industries, and quality control departments for assessing material suitability for stamping and deep drawing processes.

Key Features

• High-precision hydraulic or mechanical indentation system
• Rigid and vibration-free heavy-duty frame construction
• Smooth and controlled cup-forming operation
• Digital / analog depth measurement system
• Clamping system for secure sheet holding
• Easy operation with quick test results
• Accurate and repeatable performance
• Conforms to ASTM / ISO / BIS standards

Working Principle

The machine works by forcing a hardened steel ball into a tightly clamped metal sheet at a controlled rate. The sheet is gradually deformed until a crack appears. The depth at which cracking occurs is measured and recorded as the Erichsen Index, indicating the materials formability and ductility.

Applications

• Sheet metal formability testing
• Automotive body panel material testing
• Steel, aluminum, and alloy sheet evaluation
• Paint and coating adhesion testing (indirect use)
• Metal fabrication and stamping industries
• Research and quality control laboratories
• Educational engineering institutions

Advantages

• Accurately determines sheet metal ductility
• Essential for deep drawing process validation
• Simple and reliable testing method
• Helps prevent cracking during forming operations
• Suitable for industrial and laboratory use

Technical Specifications (Typical)

• Indenter: Hardened steel ball
• Clamping system: Hydraulic / mechanical
• Measuring range: Digital depth gauge / dial indicator
• Sheet thickness: As per model capacity
• Operation: Manual / motorized loading
• Standards: ISO 8490 / ASTM E643 compliant