Sheet Metal Testing Machine - Ear Measuring Instrument - Model 126

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The ear measuring instrument, Model 126, is a sturdy desk-top device. Earing measurements are taken using transducers with associate amplifier. The height of the ears is displayed on a clear digital read-out, either as a percentage measurement or in mm. All settings required for the testing process are simply entered by way of the control panel.

As a result of the various casting, rolling and heat treatment processes used in the manufacture of sheet and strip made of ferrous and nonferrous metals, these materials tend to develop varying anisotropic properties, i.e. distinct crystal orientation takes place in various directions of the sheet resulting in diverging mechanical properties.

Anisotropy in sheet metal becomes apparent during deep drawing processes by causing earing at the ends of the drawn workpieces. This formation of ears is undesirable as it makes additional work and increases waste material.

Handling

The ear measuring instrument is easy to operate.

Once the test parameters have been pre-set and a centring ring corresponding to the standard cup selected, the standard cup is positioned on the testing plate.

The individual measuring results showing the height of the ears can be obtained as a percentage or mm value by actuating the push button.

Application

The ear measuring instrument, Model 126, is intended for the numerical determination of ears which form on cylindrical deep drawn cups as a result of anisotropy. These standard cups show four ears together with the corresponding "valleys", which can have various depths and heights, depending on the existing anisotropy, the size of the initial blank and the diameter of the drawing punch.

Measuring the ears on standard cups by way of vernier calipers or similar measuring devices is time-consuming and complicated. With our ear measuring instrument this work is carried out electronically and the ear height can be read off immediately on a digital display. The most practical stage for taking ear measurements is directly after the deep drawing test, preferably after carrying out the deep drawing cup test.

With the ear measuring instrument measurements can be taken on cups which have an inner diameter of between 15 and 100 mm and a sheet thickness of up to 6 mm.

Manufacturing of Standard Cups

The standard cups required for the earing test can be made using Sheet Metal Testing Machines, models 106, 134, 142 or 145.

This entails cutting a circular blank from the strip and forming the cup in one operation, using the appropriate punching tools.

Basic package Proportional mean earing Maximum ear height Minimum height Mean height Direction of the skewness Skewness Number of ears Paired Earing This package can be adjusted and extended to suit specific needs which are relevant in practice due to the various number of different analytic methods.

Extensions (selection): Max Earing Delta Earing Sigma Earing Mean Earing Classification of the ears We offer competent consultation for individual needs, further data and methods.

Operational accessories

Manufacture of Standard Cups The standard cups required for the earing test can be made using ERICHSEN Sheet Metal Testing Machines, models 106, 134, 142 or 145. This entails cutting a circular blank from the strip and forming the cup in one operation, using the appropriate punching tools.

Technical Specifications for Sheet Metal Testing Machine - Ear Measuring Instrument - Model 126
Dimensions	Width: 180 mm Depth: 305 mm Height: 225 mm
Net weight	9 kg
Voltage	230 V AC, 50 Hz
Power requirement	25 W
Measuring Accuracy
Height of ears	± 0.1 mm
Height of cup	± 0.1 mm
% relationship	± 0.5 %
Measuring Range B1/B2
Cup inside Φ	15 - 50 mm
Height of ears	0 - 10 mm
Height of cup	11 - 45 mm
% relationship	0 - 11 %
Preselection of sheet thickness	0 - 6 mm
Measuring Range B3/B4
Cup inside Φ	51 - 100
Height of ears	0 - 15 mm
Height of cup	11 - 70 mm
% relationship	0 - 11 %
Preselection of sheet thickness	0 - 6 mm

Ordering Information for Sheet Metal Testing Machine - Ear Measuring Instrument - Model 126
Part No.	Description
0029.01.31	Sheet Metal Testing Machine - Ear Measuring Instrument - Model 126

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