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71. 发明专利

JPS55109581A QUALITY MONITORING METHOD OF RESISTANCE WELDING 失效
公开(公告)号：JPS55109581A
公开(公告)日：1980-08-23
申请号：JP1732679
申请日：1979-02-19
申请人： HITACHI LTD
发明人： TAGUCHI FUMIO , KATOU MITSUO , SHIDA TOMOHIKO , NIHEI MASASUKE , ASHITA EIJI
IPC分类号： B23K11/25 , B23K11/24
摘要： PURPOSE:To perform the captioned monitoring of spot welding with good accuracy by judging the non-defective and defective of welding from the ratio between the 1st peak of the effective value signal of AE generated during welding and the 2nd peak of the AE signal generated after supply of welding current. CONSTITUTION:The AE generated from welding material 2 is detected by the AE sensor 3 mounted to an electrode part 1 and is amplified by amplifiers 4, 6. The AE waveforms having been amplified are detected with a detecting circuit 7 and are converted to effective value energy by an effective value conversion circuit 8, whereby the AE effective value voltage 1st peak value during supplying of welding current and the 2nd peak value after the current supply are detected. Thereafter AE peak effective ratio (2nd peak value/1st peak value X100) is outputted by an arithmetic circuit 9 and is compared with a set value 10 in a decision circuit 11, whereby the non-defective and defective of the welding are determined.

72. 发明专利

JPS5544555A HARDENING METHOD OF CARBON STEEL PARTS 失效
公开(公告)号：JPS5544555A
公开(公告)日：1980-03-28
申请号：JP11786578
申请日：1978-09-27
申请人： HITACHI LTD
发明人： INAGAKI MASATOSHI , UNNO TOMIO , JINBOU RIYUUTAROU , SHIDA TOMOHIKO , KOJIMA YOSHIYUKI , ASAHI NAOTATSU
IPC分类号： C23C8/04 , C21D1/09 , C21D1/34 , C23C8/46
摘要： PURPOSE:To prevent deformation owing to hardening and let hardening of high accuracy be accomplished by carburizing the surfaces of the parts formed of low carbon steel then hardening the required portions through laser light radiation. CONSTITUTION:The intended parts are made by pressing low carbon steel of C

73. 发明专利

JPS54116799A RAZOR MACHINING METHOD AND ITS DEVICE 失效
公开(公告)号：JPS54116799A
公开(公告)日：1979-09-11
申请号：JP2352578
申请日：1978-03-03
申请人： HITACHI LTD
发明人： INAGAKI MASATOSHI , JINBOU RIYUUTAROU , UNNO TOMIO , SHIDA TOMOHIKO
IPC分类号： B23K26/06 , B23K26/067 , B23K26/073 , C21D1/09
摘要： PURPOSE:Energy density distribution of divided razor beam is reflected various time and after that it is concentrated again in such a way that at least energy density distribution of one direction becomes more or less uniform. Then, it is radiated to a machining material so as to form heat treatment layer of uniform depth efficiently. CONSTITUTION:A razor beam 10 is radiated to a conical body 34 having a reflecting surface; 30 and 32 and then the razor is divided to a razor beam; 36 and 37. Next, the divided razor beam; 36 and 37, is reflected to a plain mirror; 38 and 40, again to be radiated to the treat treated part of a machining material 14 at the same time. At this time, the sectional shape of the razor beam radiated on the machining material 14 is in the right angle to the direction of division of the razor beam 10, i.e., uniform energy density distribution can be attained to the axis X so that heat treated layer with uniform depth can possibly be formed with high efficiency.

74. 发明专利

JPS54101737A WELDING METHOD BY HIGH OUTPUT HIGH DENSITY ELECTRON BEAM 失效
公开(公告)号：JPS54101737A
公开(公告)日：1979-08-10
申请号：JP823278
申请日：1978-01-30
申请人： HITACHI LTD
发明人： OKAMURA HISANOBU , SHIDA TOMOHIKO
IPC分类号： B23K15/00 , B23K26/21
摘要： PURPOSE:To obtain sufficient weld-joint characteristics, when T-type or L-type joint is welded using a high output high density beam, by repairing weld defects generated after the welding work at the weld zone on the side of incidence of the beam and on the opposite side. CONSTITUTION:A T-type joint is made of parts 4 and 5 by the electron beam 6 welding, and the weld zone 7 is formed. Hereupon, a part of molten metal spouts out opposite against the direction of incidence of the beam, and forms the molten metal drop 9; as a result, an undercut zone is formed at the corner on the incidence side depending on the lack of molten metal. In case of circumstances, a lack of penetration is caused. For the purpose of efficiently repairing above stated defects at the weld zone and of forming good reinforcement weld, an additional welding is carried out on the corner of above stated weld zone 7 depending on the unfocused electron beam; hereby, the reinforcement weld 11 is formed. Moreover, the filler metal 10 is preferable to be used for the corner where the undercut is caused. For the L-type joint, the welding is performed similarly to above case.

75. 发明专利

JPS5477249A LASER WELDING 失效
公开(公告)号：JPS5477249A
公开(公告)日：1979-06-20
申请号：JP14389277
申请日：1977-12-02
申请人： HITACHI LTD
发明人： TAKAHASHI SHIGERU , JINBOU RIYUUTAROU , SHIDA TOMOHIKO
IPC分类号： B23K26/21
摘要： PURPOSE:A laser beam is irradiated onto a butt portion of Ni-plated electronic parts or the like to form a hemispherical raised bead, whereby weld operation is regulated so that the final solidification of molten metal occurs at the bead center thereby to obtain air-tight welded zone. CONSTITUTION:A Ni-plated Ni-Fe alloy member A and the like is butted with a Ni-Fe-Co alloy member B and the like. A laser beam 3 center is projected at a location of the butt portion about 0.05-0.1 mm closer to the A member to form a hemispherical raised bead on a welding zone 1. The process eliminates the segregation of Ni-plate composition at the butt portion, causes molten metal to solidify lastly at the center 5 of the bead portion and provides a sound weld bead free of crack generation.

76. 发明专利

JPS5436695A LASER PROCESSING METHOD 失效
公开(公告)号：JPS5436695A
公开(公告)日：1979-03-17
申请号：JP10160777
申请日：1977-08-26
申请人： HITACHI LTD
发明人： UNNO TOMIO , JINBOU RIYUUTAROU , SHIDA TOMOHIKO
IPC分类号： B23K26/14
摘要： PURPOSE:To effectively remove plasma with a high-speed gas flowing through a passage formed close to a center gas passage.

77. 发明专利

JPS5414096A METHOD AND DEVICE FOR LASER PROCESSING 失效
公开(公告)号：JPS5414096A
公开(公告)日：1979-02-01
申请号：JP7789877
申请日：1977-07-01
申请人： HITACHI LTD
发明人： SHIDA TOMOHIKO , JINBOU RIYUUTAROU , UNNO TOMIO , TAKAHASHI SHIGERU , INAGAKI MASATOSHI
IPC分类号： G02B5/00 , B23K26/06 , B23K26/066 , B23K26/073 , B23K26/382
摘要： PURPOSE:To effectively use a laser light source, by irradiating against a processed material the laser light corresponding to a processed part after controlling the intensity of the laser light on an optical path.

78. 发明专利

JPS53120647A WELDING METHOD FOR ELECTRON BEAM OF HIGH CARBON STEEL MATERIAL 失效
公开(公告)号：JPS53120647A
公开(公告)日：1978-10-21
申请号：JP3535477
申请日：1977-03-31
申请人： HITACHI LTD
发明人： OKAMURA HISANOBU , SHIDA TOMOHIKO , MIDORIKAWA MASAKAZU
IPC分类号： B23K15/00
摘要： PURPOSE:To prevent the occurrence of crack at welding part, by carrying out electron beam welding, butting overlay welding part, after carrying out overlay welding of steel, being carbon content less than 0.20%, on welding surface, at the time of welding high carbon steel, containing carbon more than 3.30%.

79. 发明专利

JPS52156739A HIGH SPEED ARC WELDING 失效
公开(公告)号：JPS52156739A
公开(公告)日：1977-12-27
申请号：JP7325676
申请日：1976-06-23
申请人： HITACHI LTD
发明人： SUZUKI MUNENOBU , SHIDA TOMOHIKO
IPC分类号： B23K9/16 , B23K9/00 , B23K9/12

80. 发明专利

JPS5270959A WELD STRUCTURE WELDED BY HIGH ENERGY DENSITY BEAM AND ITS WELDING METHOD AND DEVICE 失效
公开(公告)号：JPS5270959A
公开(公告)日：1977-06-13
申请号：JP14638075
申请日：1975-12-10
申请人： HITACHI LTD
发明人： SUZUKI MUNENOBU , SHIDA TOMOHIKO
IPC分类号： B23K15/02 , B23K15/00

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