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Patent Searching and Data


Title:
METHOD FOR MANUFACTURING SCREW, WHIRLING CUTTER, AND SCREW MANUFACTURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/078365
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a screw which is capable of solving a problem due to rolling or cutting and prevents the movement path of an insert (13) from interfering with a desired curve line of the screw at the time of exiting and entering the curve line, thereby providing an intended curve line to the screw by a thread whirling process. In the method for manufacturing the screw, in the case where a lead angle and an attachment angle (β) of the screw are different from each other, the attachment angle is determined from the following equation. Attachment angle = tan-1{n*pitch/(π*D1)} D1 = {(screw core diameter + screw outside diameter)/2} + ∆T screw core diameter ≤ D1 ≤ screw outside diameter In the case where ∆T > 0 is satisfied, {(screw outside diameter - screw core diameter)/2}*0.2 <∆T < {(screw outside diameter - screw core diameter)/2} In the case where ∆T < 0 is satisfied, -{(screw outside diameter - screw core diameter)/2} <∆T < -{(screw outside diameter - screw core diameter)/2}*0.2 where D1≠0, ∆T≠0, and n is the number of threads

Inventors:
ISOBE, Kenji (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
磯部 健二 (〒25 愛知県名古屋市瑞穂区高辻町14番18号 日本特殊陶業株式会社内 Aichi, 〒4678525, JP)
KOIKE, Taku (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
小池 拓 (〒25 愛知県名古屋市瑞穂区高辻町14番18号 日本特殊陶業株式会社内 Aichi, 〒4678525, JP)
Application Number:
JP2010/073442
Publication Date:
June 30, 2011
Filing Date:
December 24, 2010
Export Citation:
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Assignee:
NGK SPARK PLUG CO., LTD. (14-18, Takatsuji-cho Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
日本特殊陶業株式会社 (〒25 愛知県名古屋市瑞穂区高辻町14番18号 Aichi, 〒4678525, JP)
ISOBE, Kenji (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
磯部 健二 (〒25 愛知県名古屋市瑞穂区高辻町14番18号 日本特殊陶業株式会社内 Aichi, 〒4678525, JP)
KOIKE, Taku (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
International Classes:
A61B17/58; B23G1/34
Foreign References:
US20040081519A1
JPS63200915A
JPH1058233A
JP2008296311A
Attorney, Agent or Firm:
NAGOYA INTERNATIONAL PATENT FIRM (Meishin Bldg, 20-19 Nishiki 1-chome, Naka-ku, Nagoya-sh, Aichi 03, 〒4600003, JP)
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