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Title:
TAPPING MACHINE FOR SCREW THREADING OF METALLIC NUTS PROVIDED WITH A CENTERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/092021
Kind Code:
A3
Abstract:
A tapping machine (10), for tapping perforated products such as nuts (14), bushings or the like, comprises a spindle (11) on the longitudinal axis (12) of which a tapping tool (13) is rotatably mounted which tapping tool (13) is provided with a stem (21) having a longitudinal axis and a head having a threading to be inserted inside an appropriate hole provided in a nut (14) to be threaded, as well as pusher devices (16) for pushing a nut (14) against the threading surface of the tapping tool (13). Said machine further comprises an anti-vibration centring group (19) which acts on the stem of the tapping tool (13), substantially constraining the tapping tool (13) in a radial direction, preventing a de-alignment of the longitudinal axis (12) of the stem of the tapping tool and maintaining freedom of rotation thereof. Said anti- vibration centring group (19) is selectively movable along the stem of the tapping tool (13) in a parallel direction to the longitudinal axis of said stem (21).

Inventors:
VESCOVINI, Federico (Via Deciani 58/10, Udine, 33100, IT)
Application Number:
IB2017/057100
Publication Date:
July 19, 2018
Filing Date:
November 14, 2017
Export Citation:
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Assignee:
NIPPON TAPPER CO., LTD. (13-10 Oomorihigashi, 5-chomeOta-ku Tokyo, 12, 〒1430012, JP)
International Classes:
B23G1/18; B07C5/36; B23G1/48; B23Q7/12
Domestic Patent References:
WO2009057962A22009-05-07
Foreign References:
KR100352458B12002-09-11
US1887649A1932-11-15
JP2891980B11999-05-17
CN105478927A2016-04-13
US2115599A1938-04-26
US1918290A1933-07-18
DE19527406A11997-01-30
EP2743019A12014-06-18
US20140346095A12014-11-27
US3677401A1972-07-18
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