ULTRASONIC TESTING MACHINE FOR COLD DRAWN STEEL

Westfälische Drahtindustrie GmbH

- BLANKSTAHL -

Erzstraße 4

D-59067 Hamm

Tel.: +49/ (0) 2381-276-247

Fax: +49/ (0) 2381-276-208

E-Mail: blank.hamm@wdi.de

www.wdi.de

The testing equipment is conceived for the ultrasonic testing

of round and hexagon bars.

Diameter: 8 - 42 mm

Hexagon: 10 - 36 mm

Bar length: 2,5 - 6,0 m

Test Speed: max. 2 m/second

The bars are linear transported, without being set into rotation.

The test system works statically, without rotation as well.

Test procedure:

The ultrasonic testing checks for surface defects (longitudinal defects)

and center defects in the entire cross section.

The coupling of the ultrasonic signals takes place in dipping

technology, that means both the sensors as well as the test bars are

under water during the examination.

ULTRASONIC TESTING MACHINE FOR COLD DRAWN STEEL (ROUND / HEXAGONAL)

Testing of surface defects – round material:

The angle of sonic radiation is centrally adjusted to a fixed angle for all

sensors of a test disc. Over a central adjustment the sensors located

on several levels are rotated against each other, so that the sensors of

one level are sounding exactly into the gaps of the next level. Thus it

ensures, that the sensors do not examine redundantly and cover the

total surface area to 100 %.

Testing of surface defects – hexagonal material:

The angle of sonic radiation is centrally adjusted to a fixed angle

for all sensors of a test disc.

Testing of center defects – round material:

The angle of sonic radiation of the sensors takes place vertically. Thus

it is reached, that the sensors do not examine redundantly and cover

the center to 100% and also recognize direction-controlled mistakes.

Testing of center defects – hexagonal material:

The angle of sonic radiation of the sensors takes place vertically. By

a dimension-dependent activation of the sensors and by the choice

of two sonic radiation positions, one ensures that the sensors do not

examine redundantly and cover the center to 100 %.