专利名称：Drill and method for its production发明人：DREPS, KLAUS,UEBELE, KLEMENS申请号：EP97118281.1申请日：19971021公开号：EP0865847A2公开日：19980923
专利附图：
摘要：The drill has at least one swarf removal groove which extends at least partiallyover the drill body and has a spiral form. The groove (22) is formed by a chipless formingoperation, by rotating a blank and subjecting it to cold deformation. Alternatively, a hotforming operation technique can be used. An extrusion press or injection forming process
can be used to produce the groove.
申请人：DREBO WERKZEUGFABRIK GMBH
地址：Ulrichstrasse 22 D-88361 Altshausen DE
国籍：DE
代理机构：Baronetzky, Klaus, Dipl.-Ing.
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