Title:
INCLINED SMALL HOLE WORKING METHOD
Document Type and Number:
WIPO Patent Application WO/2009/025250
Kind Code:
A1
Abstract:
Intended is to enable an inclined small hole working method for forming a small
hole inclined at a predetermined angle in a work made of a relatively hard material,
to achieve the shaping precision and the positioning precision of the small hole
at high levels while making the small hole deeper at a higher inclination angle.
The inclined small hole working method forms the small hole by feeding the drill
at a predetermined feeding pitch such that a drill rotating axis is aligned with
a cut-scheduled line (X) inclined at a predetermined angle with respect to the
line normal to the surface of a work (1). A guide hole (10a) having an internal
diameter of substantially the same size as that of a drill diameter (d) and holding
the drill tip portion to regulate the play of the rotating axis in the centrifugal
direction is so formed by cutting it in a substantially cylindrical shape from
the surface of the work (1) by means of an end mill (2) that the center axis may be
aligned with the cut-scheduled line (X). Next, the drill cutting step is started
by inserting the tip portion of a drill (30a) into the guide hole (10a). At the
approaching step of the boring operation, the drill cutting position/direction
is guided into alignment with the cut-scheduled line (X) by the guide hole (10a).
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Inventors:
YANAGISAWA, Kouji (1283-1, Hirai-Cho,Isesaki-Cit, Gunma 33, 3792233, JP)
柳澤宏次 (〒33 群馬県伊勢崎市平井町１２８３番地１ 株式会社柳沢技研内 Gunma, 3792233, JP)
SAITO, Yasuhiro (251-2, Arako-Machi Maebashi-Cit, Gunma 06, 3792106, JP)
齊籐康弘 (〒06 群馬県前橋市荒子町２５１番地２ Gunma, 3792106, JP)
YANAGISAWA, Takajyu (1283-1, Hirai-Cho,Isesaki-Cit, Gunma 33, 3792233, JP)
柳澤宏次 (〒33 群馬県伊勢崎市平井町１２８３番地１ 株式会社柳沢技研内 Gunma, 3792233, JP)
SAITO, Yasuhiro (251-2, Arako-Machi Maebashi-Cit, Gunma 06, 3792106, JP)
齊籐康弘 (〒06 群馬県前橋市荒子町２５１番地２ Gunma, 3792106, JP)
YANAGISAWA, Takajyu (1283-1, Hirai-Cho,Isesaki-Cit, Gunma 33, 3792233, JP)
Application Number:
JP2008/064665
Publication Date:
February 26, 2009
Filing Date:
August 11, 2008
Export Citation:
Assignee:
YANAGISAWA-GIKEN CO., LTD. (1283-1, Hirai-Cho Isesaki-Cit, Gunma 33, 3792233, JP)
株式会社柳沢技研 (〒33 群馬県伊勢崎市平井町１２８３番地１ Gunma, 3792233, JP)
YANAGISAWA, Kouji (1283-1, Hirai-Cho,Isesaki-Cit, Gunma 33, 3792233, JP)
柳澤宏次 (〒33 群馬県伊勢崎市平井町１２８３番地１ 株式会社柳沢技研内 Gunma, 3792233, JP)
SAITO, Yasuhiro (251-2, Arako-Machi Maebashi-Cit, Gunma 06, 3792106, JP)
齊籐康弘 (〒06 群馬県前橋市荒子町２５１番地２ Gunma, 3792106, JP)
株式会社柳沢技研 (〒33 群馬県伊勢崎市平井町１２８３番地１ Gunma, 3792233, JP)
YANAGISAWA, Kouji (1283-1, Hirai-Cho,Isesaki-Cit, Gunma 33, 3792233, JP)
柳澤宏次 (〒33 群馬県伊勢崎市平井町１２８３番地１ 株式会社柳沢技研内 Gunma, 3792233, JP)
SAITO, Yasuhiro (251-2, Arako-Machi Maebashi-Cit, Gunma 06, 3792106, JP)
齊籐康弘 (〒06 群馬県前橋市荒子町２５１番地２ Gunma, 3792106, JP)
International Classes:
B23B35/00; B23B41/14; B23B47/18; B23B49/00
Attorney, Agent or Firm:
HASHIMOTO, Katsuhiko (SOYU PARTNERS P.C, PORARIS UENO 27-10Higashi Ueno 4-Chome, Taito-K, Tokyo 15, 11000, JP)
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