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Nonferrous topics such as copper and aluminum, annealing, etc. go here.

TOPIC: Frequent wire breaks

Frequent wire breaks 4 months 2 days ago #3077

Hello everyone,

We are facing frequent wire breaks in the Niehoff 32 line MMH101 multi wire drawing machine at a very slow speed, 15 m/s from the annealer section and sometimes from the wire drawing section. Analyzing the break sample we found most of the breaks due to inclusion in the copper. Beside that another machine of Niehoff is being commissioned which is running at its rated speed of 35 m/s without any break with a lower standard copper than the previous machine.

Can anybody suggest me what may be the possible reasons if lubricant concentration, dancer pressure, spool condition being maintained as per standard??
Last Edit: 3 months 3 weeks ago by Peter J Stewart-Hay.
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Frequent wire breaks 3 months 3 weeks ago #3082

Hello Mr. Suman Roy,

Sometimes, when you are running your machine very slow, you get chattering on the capstans inside the machine. If this is happening, there is indeed the opportunity for inclusion type wire breaks due wire shock and reduced cross-section area by virtue of the inclusions.
Peter J. Stewart-Hay Principal
Stewart-Hay Associates
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