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公开(公告)号：JPH01176647A
公开(公告)日：1989-07-13
申请号：JP33480787
申请日：1987-12-29
Applicant: HITACHI LTD , HITACHI SERVICE ENG , NIPPON KOKAN KK
Inventor： KUROISHI KAZUO , TAKIZAWA TERUHIRO , MIDORIKAWA MASAKAZU , NAMATAME TOSHIO , EHATA TOYOAKI , MATSUDA MASAYOSHI , KOSUGE SHIGECHIKA , NAKADA KIYOKAZU , TAGANE AKIRA
IPC: H01J37/22 , H01J37/244 , H01J37/315
Abstract: PURPOSE:To reduce welding work time by a large margin by outputting a control signal based on an information signal obtained with a groove detection means. CONSTITUTION:Secondary electrons of a detecting electron beam 2 reflected from an object 3 to be welded is detected with a detecting operation for a groove 4 and information signals on the groove position and the groove width of the object 3 are obtained with a groove detection means 70. The obtained information signals are inputted to an operation circuit section 60 from which control signals calculated based on the information signals are outputted. A control device K is controlled with the control signals outputted from the operation circuit section 60. The control device K also drive-controls a welding means which irradiates an electron beam 2 for welding onto the groove 4 of the object 3 to be welded on a movement path corrected corresponding to the groove position by means of the welding means.
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公开(公告)号：JPS63130235A
公开(公告)日：1988-06-02
申请号：JP27659386
申请日：1986-11-21
Applicant: HITACHI LTD
Inventor： KUROKAWA TAKEO , NAKASAKI TAKAMITSU , MIDORIKAWA MASAKAZU
Abstract: PURPOSE:To reduce bending force, and also, to improve a yield by providing a clevis corresponding to the bending inside diameter and the plate width, on the side face which becomes the inside diameter side of bending of a band plate which is rolled and comes out, thereafter, executing the bending. CONSTITUTION:A stock 1 rolled by the upper and the lower rolling rollers 2, 4 is fed out forward. Immediately after this rolling, bending moment is added by a bending control means 3 which can move to the right and left from the side direction. By providing a clevis part 5 for reducing a deformed volume quantity N, the bending moment quantity can be reduced. According to this method, the yield of a product can be improved.
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公开(公告)号：JPS61107646A
公开(公告)日：1986-05-26
申请号：JP22848584
申请日：1984-10-30
Applicant: Hitachi Ltd
Inventor： KITA HISANAO , YAMAZAKI SHINJI , NAKASAKI TAKAMITSU , TOKUNAGA KIICHI , MIDORIKAWA MASAKAZU , UEHARA TAKEO
IPC: H01J37/30 , H01J37/24 , H01J37/248
CPC classification number: H01J37/241
Abstract: PURPOSE:To interrupt operation of the captioned machine when electrical discharge is produced in an electron gun by detecting a current flowing in a circuit and voltage applied to load, and operating a high-tension interruption device in a state thereof insulated from an earth by means of optical fibers. CONSTITUTION:A high-tension main circuit of an electron beam processing machine is adapted to have a high-tension power source 1, an electron gun 2, and a high-tension interruption device 3, and adapted to interrupt operation of the electron gun 2 by making use of the high-tension interruption device 3 when electrical discharge is produced in the electron gun 2, and return it to an original state after the elapse of prescribed time for protecting the device. A control circuit 4 thereupon receives signals from a beam current detector circuit 6 disposed serially between the high-tension power source 1 and an earth and an accelerating voltage detector circuit 7 arranged parallely to the high-tension main circuit for controlling the high-tension interruption device 3 with use of optical fibers 5. Accordingly, a problem of dielectric strength of the device against the earth can be eliminated to prevent any electrical discharge form being produced in the electron gun 2 for applying the captioned machine with ease to existing processing machines.
Abstract translation: 目的：通过检测在电路中流过的电流和施加在负载上的电压，在电子枪中产生放电时中断字幕机的操作，并且在通过装置与地球绝缘的状态下操作高压中断装置 的光纤。 构成：电子束处理机的高压主电路适于具有高压电源1，电子枪2和高压中断装置3，适于中断电子枪2的动作 通过在电子枪2中产生放电时利用高压中断装置3，并且在经过用于保护装置的规定时间之后将其返回到原始状态。 控制电路4随后从高压电源1和地之间串联设置的射束电流检测器电路6和与高压主电路平行布置的加速电压检测器电路7接收信号，以控制高压中断 装置3使用光纤5.因此，可以消除器件相对于地球的介电强度的问题，以防止在电子枪2中产生任何放电形式，从而容易地对现有的加工机器施加标题的机器。
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公开(公告)号：JPS5920505A
公开(公告)日：1984-02-02
申请号：JP12895182
申请日：1982-07-26
Applicant: Hitachi Ltd
Inventor： AKUTSU YOUJI , KITA HISANAO , ISHIMURA TETSUO , MIDORIKAWA MASAKAZU , KOIKE JIROU
IPC: F01D9/02
CPC classification number: F01D9/02
Abstract: PURPOSE:To prevent deformation of both rear and front plates in welding and obtain a nozzle blade of high precision by providing, in the interior of a hollow nozzle blade, a deformation preventing plate smaller than the external shape of an ultimately aimed nozzle blade by thickness of both rear and front plates of the nozzle blade. CONSTITUTION:A hollow nozzle blade 1 is formed as one body through uniting a rear plate 2, front plate 3 and a joint plate 4 by means of a welding part 5. In this case, when assembly of a joint plate 4 is performed, a deformation preventing plate 11, with the same shape as that of the inner wall side of the rear plate 2 and the front plate 3, is inserted and fixed temporarily. A contour shape 12 of the deformation preventing plate 11 is conformed to the shape smaller than that of the final nozzle blade required from view of design by thickness of the rear plate 2 and the front plate 3. Therefore, in case the rear plate 2 and the front plate 3 are shrunk during the abovementioned uniting of each plate 2-4, deformation of the rear plate 2 and the front plate 3 is prevented by means of the deformation preventing plate 11, and the contour after welding is conformed to the finally required one.
Abstract translation: 目的：为了防止焊接中后板和前板的变形，并通过在中空喷嘴刀片的内部设置小于最终目标喷嘴刀片的外部形状的变形防止板，由此获得高精度的喷嘴刀片 的喷嘴叶片的后板和前板。 构成：通过焊接部5使后板2，前板3和接合板4结合而形成中空的喷嘴叶片1作为一体。在这种情况下，当进行接合板4的组装时， 与后板2和前板3的内壁侧的形状相同的变形防止板11被暂时插入和固定。 变形防止板11的轮廓形状12符合从背板2和前板3的厚度的设计的观点来看比从最终喷嘴叶片的形状小的形状。因此，如果后板2和 前板3在每个板2-4的上述组合期间收缩，通过变形防止板11防止后板2和前板3的变形，并且焊接后的轮廓符合最终所需的 一。
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公开(公告)号：JPH07324672A
公开(公告)日：1995-12-12
申请号：JP32662794
申请日：1994-12-28
Applicant: HITACHI LTD
Inventor： TANIDA SHOZO , FUNAMOTO TAKAO , KITAMURA NORIO , KOMATSU JUNZO , MIDORIKAWA MASAKAZU , YOSHIKAWA TSUGIO
Abstract: PURPOSE:To provide a rolled steel plate for a hydraulic turbine runner having properties of high strength and high tenacity, and by which the hydraulic turbine runner can be manufactured with less manhours. CONSTITUTION:A rolled steel plate to be used for a hydraulic turbine runner composed of a vane 1, a crown 2 and a band 3 is constituted as follows; 0.01 to 0.10 carbon, 0.10 to 1.0% silicon, 0.10 to 2.0% manganese, 2 to 7% nickel, 10 to 15% chromium and 0.10 to 3% molybdenum, and the remainder of Fe and unavoidable impurities. The metallic organization is of mixture of martensite and residual austenite, and the residual austenite amount is 10 to 35% by the volume ratio.
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Patent Agency Ranking
公开(公告)号：JPH0619972B2
公开(公告)日：1994-03-16
申请号：JP25445985
申请日：1985-11-13
Applicant: HITACHI LTD
Inventor： KITA HISANAO , YAMAZAKI SHINJI , NAKASAKI TAKAMITSU , TOKUNAGA KIICHI , MIDORIKAWA MASAKAZU , UEHARA TAKEO
IPC: H01J37/248 , B23K15/00 , H01J37/30 , H01J37/315
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公开(公告)号：JPH023005B2
公开(公告)日：1990-01-22
申请号：JP9622382
申请日：1982-06-07
Applicant: HITACHI LTD
Inventor： MATSUDA MASAKI , KOIKE JIRO , AKUTSU YOJI , KAWADA YASUSHI , ISHIMURA TETSUO , MIDORIKAWA MASAKAZU
IPC: F01D9/02
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公开(公告)号：JPS62192215A
公开(公告)日：1987-08-22
申请号：JP3336886
申请日：1986-02-18
Applicant: HITACHI LTD
Inventor： MIDORIKAWA MASAKAZU , KITA HISANAO , NAKASAKI TAKAMITSU , KUROKAWA TAKEO , WATANABE SHINOBU
IPC: B21D11/08
Abstract: PURPOSE:To perform the bending of a blank in the prescribed curvature size from the beginning with a small-sized and strong device by performing the guide and bending of the blank to be rolled by the upper and lower rolls with one side step by the inlet side guide directly provided on a bearing part and the outlet side approaching side roll. CONSTITUTION:A work blank 1 is rolled by the upper and lower rolls 2A, 3A having a stepped bank A at one side. The blank 1 is guided and pressed by the inlet side guide 11 directly provided on the housing 8 at the opposite side of the stepped bank A of the housings 7, 8 of roll bearings 5, 6 and by the side roll 4' provided by approaching to the outlet side. The blank 1 is subjected to bending by the approaching side roll4' from the beginning with preventing the side slippage of the blank 1 by the stepped part A by rolling the blank 1 by guiding it optimally. The bending of the succeeding side roll 4 is therefore made stable and correct and the blank 1 is worked in the prescribed size and curvature with a compact and strong device.
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公开(公告)号：JPH04201053A
公开(公告)日：1992-07-22
申请号：JP33155990
申请日：1990-11-28
Applicant: HITACHI LTD
Inventor： SUZUKI SHIGERU , ASUKA TEPPEI , SAKURAI TAKASHI , KUWABARA HIROSHI , MIDORIKAWA MASAKAZU , SATO TAKASHI
Abstract: PURPOSE:To obtain not only a plane buy also grind finishing faces in various shapes by registering in advance a finishing face shape, deciding the grinding zone corresponding to this finishing face shape, and controlling a grinding tool so as to grind this grinding zone. CONSTITUTION:A weld zone image pickup means 9 picking up a weld zone 4, a shape recognizing means 12 recognizing the shape and position of the weld zone 4 from the data obtained from this picking up of the image, and a grinding zone deciding means 13 deciding the grinding zone of the weld, zone 4, with the position of a finishing face being calculated, based on a preset finishing face shape and the shape and position of the recognized weld zone, are provided. Based on this decided grinding zone, the moving route of a grinding tool is calculated by a moving route calculation means 14, and the grinding tool 7 is moved according to this moving route 5.
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公开(公告)号：JPS63274050A
公开(公告)日：1988-11-11
申请号：JP10902587
申请日：1987-05-06
Applicant: HITACHI LTD
Inventor： YAMAZAKI SHINJI , NAKASAKI TAKAMITSU , KOBAYASHI KAZU , MIDORIKAWA MASAKAZU
IPC: H01J37/248 , B23K15/00 , B23K15/02 , H01J37/30
Abstract: PURPOSE:To reduce the load of a power feeding device as well as to secure the safe operation area of switching elements by furnishing an integrated control circuit, providing high voltage, high speed cutting-off devices in parallel, and making the cutting-off ability variable responding to a desired output. CONSTITUTION:This control device is composed of a group of a high voltage, high speed cutting-off devices 3, a group of time regulating circuits 4, and an integrated control circuit 9 to integrate the time regulating circuit 4 group. To the integrated control circuit 9, signals from discharge perceiving circuits are input, and the time regulating circuit 4 group and the high voltage high speed cutting-off device 3 group are controlled. The current 10 flowing to an electron gun 2 is divided into currents 101, 102...10N by the high voltage, high speed cutting-off devices 3 respectively. Since the peak current value is divided into the numbers of the high voltage, high speed cutting-off devices 3, the element in each device can be switched within the safe operation area of itself. Moreover, the ON resistance value of the high voltage high speed cutting-off device 3 itself is reduced to one/the numbers of the devices. Consequently, the drop of voltage in the normal condition is reduced, and the load of the power feeding device 1 is decreased.
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