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91. 发明专利

JPH03196845A PRODUCTION OF CATALYST CARRIER 失效
公开(公告)号：JPH03196845A
公开(公告)日：1991-08-28
申请号：JP33642289
申请日：1989-12-27
申请人： MITSUBISHI HEAVY IND LTD
发明人： YOSHIDA YASUYUKI , KOBAYASHI TOSHIRO , HIROMOTO NOBUMI
IPC分类号： B01D35/06 , B01J37/02
摘要： PURPOSE:To obtain an inexpensive metal carrier for supporting a catalyst having satisfactory workability by forming an Al coating film on the surface of ferritic stainless steel foil and then forming alpha-Al2O3 whiskers on the surface of the coating film. CONSTITUTION:An Al coating film of 0.5-2mum thickness is formed on both sides of ferritic stainless steel foil by plating, vacuum deposition or other method. The foil is worked, assembled and subjected to diffusion treatment at a high temp. of about 800-1,100 deg.C in vacuum of about Torr. The concn. of Al in the surface is then regulated to 3-6% by oxidation treatment at about 900-1,000 deg.C in the air and alpha-Al2O3 whiskers are formed on the surface of the Al coating film. An inexpensive metal carrier for supporting a catalyst having satisfactory workability is obtd.

92. 发明专利

JPH03183892A CORE CUTTER 失效
公开(公告)号：JPH03183892A
公开(公告)日：1991-08-09
申请号：JP32067989
申请日：1989-12-12
申请人： MITSUBISHI HEAVY IND LTD
发明人： HYODO KAZUYA , ISHISE FUMIHIKO , KOBAYASHI TOSHIRO
IPC分类号： E21B10/02
摘要： PURPOSE:To make it possible to maintain the edge of a cutter bit normally in a state of sharpness by providing two inclined surfaces on the rear surface of the cutter bit, and switching the cutter bit from a cutting state to a grinding state to make it possible to hold the cutter bit. CONSTITUTION:A cutter bit 2 is supported on the front end of a casing tube 1 so that it is capable of turning. After that, two inclined surfaces 14 and 16 are provided on the rear surface of the cutter bit 2, and they are selectively brought into contact with the front end of the casing tube 1 by forward and reverse rotation of the casing tube 1, and the cutter bit 2 can be switched from a cutting state to a grinding state. When operation is continued in a cutting state to deteriorate the sharpness of the edge of the cutter bit, the casing tube 1 is reversed to change in a grinding state, and the cutter bit 2 is ground. According to the constitution, a cheap superhard alloy cutter bit can be used, and a running cost can be reduced.

93. 发明专利

JPH0313696A CONSTRUCTION METHOD FOR UNDERGROUND CAVE 失效
公开(公告)号：JPH0313696A
公开(公告)日：1991-01-22
申请号：JP14398389
申请日：1989-06-08
申请人： FUJITA CORP , ENG SHINKO KYOKAI , MITSUBISHI HEAVY IND LTD , HITACHI LTD , CENTRAL RES INST ELECT , KAJIMA CORP , KUMAGAI GUMI CO LTD , KOMATSU MFG CO LTD , SHIMIZU CONSTRUCTION CO LTD , TAISEI CORP , HITACHI CONSTRUCTION MACHINERY
发明人： WAKU AKIMASA , GOTO TETSUO , KADOTA SHUNICHI , KOBAYASHI TOSHIRO , TOMIYASU FUJIO
IPC分类号： E02D29/045 , E21D13/00 , E21D13/02 , H02J15/00
摘要： PURPOSE:To construct a wine cup type underground cave by advancing an excavating robot from the bottom section of a vertical shaft, constructing an underground continuous wall around an underground cave continuously and unattendedly, excavating the inside, and placing base concrete. CONSTITUTION:A vertical shaft 2 is excavating from the ground surface, an excavating robot is advanced in the horizontal direction from the bottom section, the dome-shaped top section 5 of an underground cave section and a recessed groove 7 extended over a cylindrical side wall section 6 connected to the lower end of the top section are excavated, then the excavating robot is lifted, and concrete is placed in the recessed groove 7 to construct an element 8 of the underground cave section. An adjacent element 8 is constructed by the same construction method, the same processes are repeated to construct the outer periphery underground continuous wall of the underground cave, its inside is excavated, and base concrete is placed. The wine cup type underground cave can be constructed continuously and unattendedly.

94. 发明专利

JPH01127177A WELDING METHOD FOR PRECIPITATION HARDENED STAINLESS STEEL 失效
公开(公告)号：JPH01127177A
公开(公告)日：1989-05-19
申请号：JP28283587
申请日：1987-11-09
申请人： MITSUBISHI HEAVY IND LTD
发明人： MIURA YUZURU , KOBAYASHI TOSHIRO
IPC分类号： B23K9/23
摘要： PURPOSE:To prevent a crack from being generated on preceding weld metal by giving plastic deformation above specific % to a preceding weld zone and subsequently, heating and cooling it to the prescribed temperature and then, performing succeeding welding thereon. CONSTITUTION:The cold or hot plastic deformation >=5% is given to the preceding weld zone of the title precipitation hardened stainless steel in advance. After the preceding weld zone is heated to 1,000-1,200 deg.C, it is cooled and continuously, the succeeding welding is performed thereon. By plastic working >=5% and heating treatment of 1,000-1,200 deg.C, a weld solidified structure of the preceding weld zone is disintegrated and recrystallized and a segregated substance of a coarse crystal grain boundary is dispersed in a fine recrystallized grain boundary. By this method, since high-temperature ductility of the preceding weld metal is improved, the crack is prevented from being generated on the preceding weld metal when the succeeding welding is performed.

95. 发明专利

JPS63104719A WINDING METHOD FOR STRIP 失效
公开(公告)号：JPS63104719A
公开(公告)日：1988-05-10
申请号：JP24828286
申请日：1986-10-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： WAKAMOTO IKUO , KOBAYASHI TOSHIRO , FUKUYAMA GORO
IPC分类号： B22D11/06 , B21C47/02
摘要： PURPOSE:To simply and surely wind a strip at a low cost by welding and connecting the winding start end of the strip produced by continuous casting to the peripheral surface of a winding wheel. CONSTITUTION:A molten metal 12 is flowed from a nozzle 1 of a continuous casting machine and is cooled by a cooling roll 3 so that a strip 2 is pulled out. The strip 2 is pressed onto a winding wheel 4 by a press roll 5 and is wound by the wheel 4. At that time, the winding start end of the strip 2 is brought into contact with the wheel 4 by a pressing spring 8 through an electrode 7 of a spot welding machine 6 installed in the downstream of the roll 5 and is spot welded to the wheel 4 by energizing the electrode 7 and then winding is started. Thus, winding of a nonmagnetic strip is performable and a magnetic strip is surely wound by an inexpensive and compact device.

96. 发明专利

JPS62234673A FLYING HIGH SPEED JOINING METHOD FOR STEEL PLATE 失效
公开(公告)号：JPS62234673A
公开(公告)日：1987-10-14
申请号：JP7548886
申请日：1986-04-03
申请人： MITSUBISHI HEAVY IND LTD
发明人： WAKAMOTO IKUO , KOBAYASHI TOSHIRO , ARAYA HIROSHI
IPC分类号： B23K11/04 , B23K11/02 , B23K11/26
摘要： PURPOSE:To shorten the time for joining steel plates and to reduce an equipment cost by butting the succeeding steel plate to the preceding steel plate, pressurizing the steel plates for the specified time and passing extra-large current of capacitor discharge or the like to the contact surfaces of the two steel plates. CONSTITUTION:Powder feed chips 3 which can regulate the traveling speed V2 of the succeeding plate 1 and are commonly used as clampers for the preceding plate 2 and the succeeding plate 1 are respectively disposed. A capacitor 11 is preliminarily charged by closing a switch 16. The speed V2 of the succeeding plate 1 is made higher than the speed V1 of the preceding plate by driving rollers 15 to butt the plates 2, 1. The plates 2, 1 are pressurized for the specified time, then a switch 12 is closed and the capacitor 11 is made to discharge electricity between the two plates 2 and 1 through the chips 3. Since the extra- large current flow to the steel plates 2, 1 the plates are welded in the short time. The equipment cost is reduced as there is no need for an intricate and costly pressurizing device.

97. 发明专利

JPS62144883A JOINING METHOD FOR TUBE OF DISSIMILAR MATERIAL 失效
公开(公告)号：JPS62144883A
公开(公告)日：1987-06-29
申请号：JP28570585
申请日：1985-12-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： WAKAMOTO IKUO , KOBAYASHI TOSHIRO , HATAKEYAMA HISASHI
IPC分类号： B23K33/00 , B23K9/00 , B23K9/23
摘要： PURPOSE:To constrain the diffusion of a carbon and to prevent the embrittlement of a weld zone by forming in a tubular transition piece after joining with diffusion or hot rolling an Ni group foil by pinching it to a welding dissimilar material and by welding it with the same material respectively by interposing it between dissimilar materials. CONSTITUTION:The movement of a carbon is caused in the welding between the ferritic steels having different carbon contents or a ferritic steel and austenitic steel, and in case of the Cr contents having a strong carbon affinity being different the carbon movement is caused especially and the embrittlement of the weld zone is caused. The joining is therefore performed with diffusion or hot rolling by interposing the Ni foil or Ni alloy foil 5 having far less carbon diffusion movement between both different materials 24, 25. A tubular transition piece 6 is machined from this joining material and both ends thereof are welded by the same kind of metal with the same kind of material respectively. The joined part is not embrittled by the suppression of the carbon movement. The interface stress is reduced and the joined part becomes good even against a high temp. creep if it is formed in a tube shape by extruding the joined cylinder.

98. 发明专利

JPS62144877A SPOT WELDING METHOD 失效
公开(公告)号：JPS62144877A
公开(公告)日：1987-06-29
申请号：JP28725685
申请日：1985-12-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： WAKAMOTO IKUO , KOBAYASHI TOSHIRO
IPC分类号： B23K9/08 , B23K9/00 , B23K9/007
摘要： PURPOSE:To uniformly penetrate an arc by rotating it by electro-magnetic force and to obtain the weld zone of high quality by performing MIG or TIG arc spot welding with passing the alternating exciting current of single phase or three phase to the exciting coil provided at the torch tip. CONSTITUTION:A six pole iron core 21 and exciting coil 22 are arranged on the periphery of the arc generating part of the welding torch 4 tip. The welding is then performed with rotating the arc by the electro-magnetic force by passing three phase exciting current from an exciting power source 23 to exciting coil 22. Consequently, no arc is concentrated in one place, a uniform penetration shape is obtd., and the thermal stress is reduced, and high temp. crack generation can be prevented.

99. 发明专利

JPS62118996A NONCONSUMABLE ELECTRODE FOR ARC WELDING 失效
公开(公告)号：JPS62118996A
公开(公告)日：1987-05-30
申请号：JP25666385
申请日：1985-11-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： WAKAMOTO IKUO , KOBAYASHI TOSHIRO
IPC分类号： B23K35/02 , B23K35/00 , B23K35/22
摘要： PURPOSE:To reduce the consumption of an electrode and to improve the durability by composing the nonconsumable electrode for arc welding by the conductive ceramics of a limited material. CONSTITUTION:The noncomsumable electrode 3 for arc welding is composed of the conductive ceramics of a zirconium boride, titanium carbide, zirconium carbide, etc. The conductive ceramics electrode thereby has extremely less consumption, there is no change in the shape at the tip part of the electrode even in case of the using for long period, the durability is improved and there is no need of performing frequent grinding and cleaning of the electrode. Due to the electrode 3 being composed of conductive ceramics the discharging perfor mance is not reduced even for its using in the atmosphere containing the reduc ing gas of H2, etc.

100. 发明专利

JPS626778A WELDING METHOD FOR CLAD STEEL 失效
公开(公告)号：JPS626778A
公开(公告)日：1987-01-13
申请号：JP14260785
申请日：1985-07-01
申请人： MITSUBISHI HEAVY IND LTD
发明人： WAKAMOTO IKUO , KOBAYASHI TOSHIRO
IPC分类号： B23K9/23
摘要： PURPOSE:To prevent effectively the separation crack at a joint part by using that which is made low C or fixing C by Nb as the welding metal at base metal side coming in contact with the welding metal of a clad material so that the diffusion movement of the C can be checked even at the joint part in the joint welding of a clad steel. CONSTITUTION:A base metal side is welded by using the welding metal containing

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