Centerdrill - Flow Punch Forming - centerdrill - #2

The standard versions include the short and long models of the centerdrill. They differ only in the length of the cylindrical part; the angle of the conical part is identical. When using these versions the material displaced against the direction of

feed remains on the surface of the workpart and forms a collar. Both models are also available in the flat version, with cutters ground into the belt that remove the collar in the same operation, resulting in a smooth surface.

Thread forming with centertap offers the exact same advantages as flow punch forming. It is a chipless process in which the material is rendered flowable and displaced from the thread root into the crests. It is similar in principle to the rolling of external threads. Because the material on the thread flanks is compressed during the process, the drawing forces of the formed threads are greater than for cut threads!

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Reference values for material S235JR (St37/2) with 2 mm wall thickness. Depending on the application and mechanical equipment, the process speeds can also be increased significantly. Our engineering specialists will be happy to advise you.

Development and Production:

ZECHA Hartmetall-Werkzeugfabrikation GmbH Benzstrasse 2 • D-75203 Koenigsbach-Stein Tel. +49 (0) 72 32 / 30 22-0 Fax +49 (0) 72 32 / 30 22-25 info@zecha.de • www.zecha.de

Sales and Engineering Services:

Centerdrill Vertriebsbüro Brunow Valterweg 19 • 65817 Eppstein Tel. +49 (0) 61 98 / 58 58 97 Fax +49 (0) 61 98 / 58 58 99 info@centerdrill.de • www.centerdrill.de