Model 142

Description

The Universal Sheet Metal Testing Machine Model 142-20-Basic with electro-hydraulic drive, fully automatic test sequence and switch off at specimen failure, max. drawing force of 200 kN.

Application

This Testing Machine can be used not only to perform effortlessly, quickly and accurately all important and known deep drawing tests for ferrous and non-ferrous metals, but it is also designed for a large number of additional technological investigations like the ERICHSEN Cupping Test and the ERICHSEN Deep Drawing Cup Test on sheet and strips. Relevant attributes are:

• Square Cup Test (40 x 40 mm)
• Bore Expanding Test (KWI Test)
• Bore Expanding Test (ISO 16630)
• Deep Drawing Test with Blankholder Quick Release (for Earing Test)
• Deep Drawing Test with Preselected Punch Stroke
• Deep Drawing Test at High Temperatures up to 550 °C
• 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

The Universal Sheet Metal Testing Machine, Model 142-Basic, consists of a solid housing made of high-strength steel into which the test aggregate (test cylinder with work piston, sheet holder plate and die) are integrated.

All components are easily accessible from outside the machine, and thus the tools for the inpidual tests can be changed quickly, too. The clear arranged menu navigation via the touch panel (99 freely programmable programs and tool changes) has password-protected levels, which protect against unauthorized access.

The operating sequence of the testing machine has been designed in such a comfortable manner that cutting of the blank as well as drawing and ejecting of the cup are executed in one single operation.

The Testing Machine is driven electro-hydraulically. The test sequence can be controlled automatically or manually, as desired. A programmable logic controller is used to control the functions of the machine. The “Start” screen displays all required parameters, such as drawing stroke, drawing force and drawing speed. The testing machine is also equipped with an inpidually adjustable crack detection system.

The triple-acting hydraulic system in conjunction with the general design results in the following cost saving simplifications:

• Blanking press in the test head
• Hydraulic cup ejector
• Fully-automatic test sequence with stop at specimen failure (as of 0.3 mm sheet thickness)
  
  

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.
• Cardanic retention ensures the consistent, parallel clamping of the specimen, independent of variations in thickness.

The Sheet Metal Testing Machine, Model 142-Basic, was developed for testing as a means for continuous production control using standardised and other established methods.

Scope of delivery

• Model 142-20-Basic
• Operating instructions
• Manufacturer's test certificate M