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1. 发明专利

JP2001179839A METHOD FOR WELDING TUBE AND APPARATUS FOR IT 失效
公开(公告)号：JP2001179839A
公开(公告)日：2001-07-03
申请号：JP36593799
申请日：1999-12-24
申请人： SEIDENSHA ELECTRONICS
发明人： ASADA YASUSHI , NATORI KATSUTO
IPC分类号： B23K26/21 , B29C65/16 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To easily and surely weld arbitrary number of tubes and to obtain large welding strength. SOLUTION: Tubes 2 and 3 carried at the same speed are guided into a V-shape by means of guide rollers 8a, 8b, 9a and 9b and are pressed by means of the press rollers 9a and 9b from the outside to bring them into contact with each other under a condition where the facing parts are flat deformed. The contact faces of both tubes 2 and 3 are made thereby to be straight lines. These contact faces are irradiated with a laser beam 7 from a laser welding means 6. The spot shape of the laser beam 7 is controlled by means of a spot shape controlling mechanism 12 in such a way that the spot shape at a welding point is made to be a straight line coinciding with the direction of the contact faces of the both tubes 2 and 3. When both tubes 2 and 3 are welded like this, thereafter, the third tube 17 is welded by the similar method.

2. 发明专利

JP2004074734A Plastic welding method 审中-公开
公开(公告)号：JP2004074734A
公开(公告)日：2004-03-11
申请号：JP2002241640
申请日：2002-08-22
申请人： Seidensha Electronics Co Ltd , 精電舎電子工業株式会社
发明人： MATSUGISHI NORIAKI , WATANABE KIMIHIKO , ASADA YASUSHI
IPC分类号： B23K26/00 , B23K26/20 , B23K26/32 , B29C65/16 , H01S3/00
CPC分类号： B29C66/301 , B29C65/1412 , B29C65/1432 , B29C65/1635 , B29C65/1677 , B29C65/32 , B29C65/72 , B29C66/0242 , B29C66/1122 , B29C66/1312 , B29C66/221 , B29C66/43 , B29C66/54 , B29C66/71 , B29C66/73921 , B29C66/81422 , B29C66/81423 , B29C66/83221 , B29C66/91411 , B29C66/91421 , B29C66/91645 , B29C66/919 , B29C66/91921 , B29K2023/12
摘要： PROBLEM TO BE SOLVED: To obtain a stable welding strength even when a welding work has poor adhesiveness on the contact face, in conducting laser welding by using a semiconductor laser. SOLUTION: In conducting the laser welding by bringing the welding flange 2 of a first welding work 1 into contact with the welding flange 4 of a second welding work 3, both contact faces 2a, 4a are, prior to the laser welding, preheated at temperatures higher than the thermal deformation temperature of both welding works 1, 3. The preheating is conducted by an electromagnetic induction heating method using a heating plate 7 and a heating coil 8, thereby softening both the contact faces 2a, 4a to enable the adhesiveness to be improved in executing the laser welding by contacting both the contact faces 2a, 4a. COPYRIGHT: (C)2004,JPO

3. 发明专利

JPH0518716A OPTICAL NONCONTACT-TYPE THICKNESS MEASURING APPARATUS 失效
公开(公告)号：JPH0518716A
公开(公告)日：1993-01-26
申请号：JP19578291
申请日：1991-07-10
申请人： SEIDENSHA ELECTRONICS
发明人： YONETANI KAZUYUKI , ASADA YASUSHI
IPC分类号： G01B11/06
摘要： PURPOSE:To measure the thickness of a transparent measurement object only by operation from one side with no contact. CONSTITUTION:A first converging lens 4, a second converging lens 5, and a half mirror 6 are put on an optical axis L2 to compose a co-focal point optical system. A measurement object 7 is put vertically to the optical axis L2. When laser beam is emitted from a He-Ne laser oscillator 2 of a light source 1, the laser beam is reflected by the half mirror 6 and led into the first converging lens 4 and converged to the light focusing point F4. When the converging lens 4 moves close to the measurement object 7, the light focusing point F4 moves from the obverse side H side to the reverse side B side of the measurement object 7. The reflected light, reflected by the measurement object 7, passes the first converting lens 4 and the half mirror 6 and is converged by the second converging lens 5 and in this case only the reflected light from the light focusing point F4 is converged to the light focusing point F5. Then, it passes a pin hole 8a of a light selecting plate 8 and is received by a photosensor 9. The reflected light from other points is cut by the light selecting plate 8.

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