Multi-parameter testing machine Model 146

automaticfully-automaticcomputer-controlled

The Model 146 is an electro-hydraulic universal sheet metal testing machine by ERICHSEN, designed for Erichsen cupping, deep-draw testing and forming-limit curve (FLC) determination. A high-speed variant (Model 146-60) provides a dedicated high-displacement oil circuit for increased drawing punch speed and a constant drawing-speed behaviour over the full stroke.

Application

• Square Cup Test (40 x 40 mm or 70 x 70 mm)
• Bore Expanding Test (ISO 16630)
• Determination of the Forming Limit Curves (FLC)
• LDH Test
• Deep Drawing Tests with Blankholder Quick Release (for Earing Test)
• Deep Drawing Tests with Preselected Punch Stroke
• Deep Drawing Test at High Temperatures up to 550 °C / 700 °C
• Bulge Test in accordance with ISO 16808
• ERICHSEN Cupping Test for Lacquer and Paint in accordance with DIN ISO 1520
• Stamping Lacquer Test and Deep Drawing Cup Test on Coil Coatings
• Special Requirements on request

Design

• Electro-hydraulically driven testing machine; test sequence can be automatic or manual
• Programme logic controller used for machine functions (optional computer controls)
• Digital display of drawing force, blankholder force and drawing punch stroke
• Triple-acting hydraulic system with cost-saving design simplifications:
• Blanking press in the test head
• Hydraulic cup ejector
• Fully-automatic test sequence

Further technical advantages

• Cylinder head with bayonet lock
• Permitting direct access to drawing dies, blanking rings, blank holders etc. and quick and convenient changing of the drawing and blanking tools
• Infinitely variable drawing speed
• Once set it remains constant throughout the drawing movement, independent of any change of load
• Cardanic drawing die retention
• Ensures the consistent, parallel clamping of the specimen, independent of variations in thickness

Sheetholder Quick Release and Drawing Punch Stop (BSA-ZS)
The sheet holder force acts on a continuously reducing area of sheet metal during the drawing sequence; to avoid squashing of ear-ends where ear forming tendency is severe, the sheet holder pressure can be released completely at a preselected depth where folds no longer form.

The machine is provided with a digital display of the drawing punch stroke and a selector switch for either "BSA" or "ZS". When the depth of draw selected on the digital display unit is reached the drawing punch stops completely ("ZS" mode) or the sheet holder force is released ("BSA" mode).

Hydraulically lifted test head
Hydraulic test head lifting ensures a high rate of working safety and facilitates convenient testing because the test head is hydraulically opened and closed.

Standards

• ISO 16808
• ISO 12004
• ISO 8490
• EN 14-58
• EN 14-67
• EN ISO 20482
• JIS Z-2247
• DIN EN 1669
• ISO 11 531
• JIS Z 2249
• GB/T 15825

Characteristics / Technical specifications

• Drive: Electro-hydraulic
• Test types: Erichsen cupping, Deep Draw Test, Hole Expansion, FLC-Test, Bulge-Test
• Blank diameter: up to 220 mm
• Net weight: approx. 3100 kg
• Mains supply: 400 V / 3∼, 50/60 Hz (Other voltages upon request)
• Drawing speed: up to 3000 mm/min
• Drawing force, max.: 600 kN (146-60), 1000 kN (146-100)
• Blanking force, max.: 800 kN (146-60), 1000 kN (146-100)
• Blankholder force, max.: 2 up to 100 kN and 10 up to 600 kN (146-60), 5 up to 250 kN and 20 up to 1000 kN (146-100)
• Bulge test (bulge dia.): up to 100 mm
• FLC test (drawing punch dia.): up to 100 mm
• Digital indicators (Drawing force): resolution 0.1 kN
• Digital indicators (Blankholder force): resolution 0.1 kN
• Digital indicators (Drawing punch stroke): resolution 0.1 mm (on request 0.01 mm)