• Patent Title: Rotary tool for precision machining of a drilled hole in a workpiece, and method for precision machining of a drilled hole
  • Application No.: US14440397
    Application Date: 2013-09-27
  • Publication No.: US09884382B2
    Publication Date: 2018-02-06
  • Inventor: Michael Hacker
  • Applicant: Kennametal Inc.
  • Applicant Address: US PA Latrobe
  • Assignee: KENNAMETAL INC.
  • Current Assignee: KENNAMETAL INC.
  • Current Assignee Address: US PA Latrobe
  • Agent Ian K. Samways
  • Priority: DE102012220125 20121105
  • International Application: PCT/US2013/062225 WO 20130927
  • International Announcement: WO2014/197000 WO 20141211
  • Main IPC: B23D77/00
  • IPC: B23D77/00 B23D77/06 B23D75/00
Rotary tool for precision machining of a drilled hole in a workpiece, and method for precision machining of a drilled hole
Abstract:
In order to achieve as highly accurate an alignment of the frictional tool as possible and therefore as high a drilled hole quality as possible during the precision machining of a drilled hole, the cutting edges of the frictional tool are divided into two cutting groups, the cutting edges of which are spaced apart with respect to one another in each case by an axial spacing from one another. Here, the axial spacing is selected in such a way that, at a predefined first, slower feed speed, merely the cutting edges of the first cutting edge group are in engagement with the workpiece and, at a higher, predefined second feed speed, all cutting edges are in engagement with the workpiece.
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