Title:
TAP TOOL AND TAPPING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/204047
Kind Code:
A1
Abstract:
This tap tool (10) has an axis of rotation (Cr) and machines a pilot hole (6') so that the same becomes a screw hole (6) in a state where the axis of rotation has been matched to a central axis (C6) of the pilot hole which is provided to a workpiece, wherein the tap tool (10) is characterized by being provided with: a thread section (14) having a blade section (14a) for machining a thread groove of the screw hole; pad sections (15, 16) located behind in a direction of rotation of the blade section, and engaging with the thread groove machined by the blade section during the machining of the thread groove; and a non-engagement section (17) for forming a space (20) between said section and the screw hole in a cross-sectional view where the axis of rotation and the central axis of the screw hole have been matched. The space has a size that enables simultaneous release of the engagement between the thread section and the thread groove and the engagement of the pad sections and the thread groove, in a case where the tap tool has shifted in a direction orthogonal to the axis of rotation within the screw hole, such shift being from the state where the axis of rotation and the central axis of the screw hole have been matched.
Inventors:
MAEDA JUNICHI (JP)
Application Number:
PCT/JP2020/014934
Publication Date:
October 08, 2020
Filing Date:
March 31, 2020
Export Citation:
Assignee:
MAKINO MILLING MACHINE (JP)
International Classes:
B23G5/06
Foreign References:
| JP2017196688A | 2017-11-02 | |||
| JP2008142826A | 2008-06-26 | |||
| JP2010046733A | 2010-03-04 | |||
| JPS60150901A | 1985-08-08 | |||
| US4090808A | 1978-05-23 | |||
| DE102016123316A1 | 2018-06-07 | |||
| EP3228411A1 | 2017-10-11 |
Other References:
See also references of EP 3950199A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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