Title:
METAL TUBE END CORRECTING APPARATUS AND METAL TUBE END CORRECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2007/114176
Kind Code:
A1
Abstract:
A metal tube end correcting apparatus comprises a plug (3) for enlarging the end
of a metal tube (1), a chuck (2) for fixing the metal tube (1), and a movement means
for moving the position of the plug (3) and/or the chuck (2). The plug (3) has a
circular cross section, and has a tapered part (31) and a equal-diameter part
(32) continuously formed in this order from its end. The outer diameter of the
tapered part (31) is gradually increased from the front end to the rear end. The
plug meets the following expressions (1) and (2). The chuck (2) can change the
fixed position of the metal tube (1). The apparatus can correct the inner diameter
of the metal tube end with an excellent dimensional accuracy. 22 ≤ LR/(D1
x 0.01/2) ≤ 115 ... (1) R2 ≥ R1 ... (2)
Inventors:
OKUI, Tatsuya (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 5410041, JP)
奥井 達也 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 住友金属工業株式会社内 Osaka, 5410041, JP)
KURODA, Kouichi (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 5410041, JP)
奥井 達也 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 住友金属工業株式会社内 Osaka, 5410041, JP)
KURODA, Kouichi (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 5410041, JP)
Application Number:
JP2007/056679
Publication Date:
October 11, 2007
Filing Date:
March 28, 2007
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 5410041, JP)
OKUI, Tatsuya (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 5410041, JP)
奥井 達也 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 住友金属工業株式会社内 Osaka, 5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 5410041, JP)
OKUI, Tatsuya (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 5410041, JP)
奥井 達也 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 住友金属工業株式会社内 Osaka, 5410041, JP)
International Classes:
B21D3/14; B21D41/02; B21D3/00; B21D41/00
Attorney, Agent or Firm:
SUGIOKA, Kanji et al. (K. Sugioka Patent Office, Amagasaki Building5-17-23, Higashinaniwa-cho, Amagasaki-sh, Hyogo 92, 6600892, JP)
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