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1. 发明专利

JP2509420B2 失效
公开(公告)号：JP2509420B2
公开(公告)日：1996-06-19
申请号：JP20031192
申请日：1992-07-04
申请人： NAGANO TANKO KK , NAGANOKEN
发明人： YAMAMOTO HIROYUKI , ODAGIRI KICHIJI , MISAWA NOBUHIKO , KITAZAWA SHUNJI , SAKATA RYOJI , YAMAMOTO JUNICHI , KOITABASHI TATSUO , KUDO SEIICHI
IPC分类号： B21J13/02

2. 发明专利

JPS62170414A HARDENING AND COOLING DEVICE FOR FORGING 失效
公开(公告)号：JPS62170414A
公开(公告)日：1987-07-27
申请号：JP1273486
申请日：1986-01-23
申请人： NAGANO TANKO KK
发明人： YAMAMOTO HIROYUKI , ISHII SHIGEO , ODAGIRI KICHIJI , NISHIYAMA FUMITAKE
IPC分类号： C21D1/63 , C21D1/18 , C21D1/64
摘要： PURPOSE:To harden forgings without quenching cracks and ununiform cooling in the stage of hardening the forgings by cooling the forgings with the cooling water which is injected diagonally upward and diagonally downward while lowering the forgings in a cylindrical body then cooling for forgings with the water injected from below while transferring the same in a water tank by means of a chain conveyor. CONSTITUTION:The square cylindrical body 12 is installed into the water tank 10 of a hardening device 18 for the forgings and while the forgings to be hardened are dropped from above to below therein, the cooling water is injected from many diagonal upward injection nozzles 14 and diagonal downward injection nozzles 30 to uniformly cool and harden the surfaces of the forgings. The cooling water becomes water 46 of which the temp. is increased by cooling the forgings. Such water overflows from a slit 24 into a the water tank. The forgings falling onto the chain conveyor 20 provided in the bottom of the water tank 10 are further cooled by the upward ejection nozzles 42 and are steadily cooled before the forgings emerge from the water tank. The forgings are thus thoroughly hardened without the generation of quenching cracks, etc.

3. 发明专利

JPH10263741A ELECTRODE PLATE FOR ELECTRIC UPSETTER 失效
公开(公告)号：JPH10263741A
公开(公告)日：1998-10-06
申请号：JP6967697
申请日：1997-03-24
申请人： NAGANO PREFECTURE , SUMITOMO COAL MINING , NAGANO TANKO KK
发明人： YAJIMA YOICHI , YAMAMOTO JUNICHI , FURUHATA HAJIME , NISHIYAMA FUMITAKE , TOKITA MASAO , SONODA MASAYUKI , ODAGIRI KICHIJI
IPC分类号： F01L3/24 , B21J9/08 , B21K1/22 , B22F3/14 , B22F5/00 , B22F7/08
摘要： PROBLEM TO BE SOLVED: To improve the service life of an electrode plate for an electric upsetter, and to manufacture a forging of excellent quality. SOLUTION: In an electrode plate 30 for an electric upsetter to heat a forged member 10 from its end face by flowing large current between the forged member 10 and a support plate 20 with one surface of the forged member abutted on and supported by the conductive support plate 20 and with the end face of the forged member 10 pressed against the other surface, the surface against which the forged member 10 is pressed is formed as a ceramic layer 32 consisting of the conductive ceramic layer 32, the surface abutted on the support plate 20 is formed as a metallic layer 34, and a buffer layer 36 to mitigate the thermal stress, etc., is formed between the ceramic layer 32 and the metallic layer 34.

4. 发明专利

JPH06122034A FORGING DIE BY USING CERAMIC DIE 失效
公开(公告)号：JPH06122034A
公开(公告)日：1994-05-06
申请号：JP20031192
申请日：1992-07-04
申请人： NAGANO TANKO KK , NAGANO PREFECTURE
发明人： YAMAMOTO HIROYUKI , ODAGIRI KICHIJI , MISAWA NOBUHIKO , KITAZAWA SHUNJI , SAKATA RYOJI , YAMAMOTO JUNICHI , KOITABASHI TATSUO , KUDO SEIICHI
IPC分类号： B21J13/02
摘要： PURPOSE:To provide a highly durable forging die by preventing the ceramics die from being destroyed during the forging operation, and provide a forging die to make effective use of the characteristics of ceramics. CONSTITUTION:In a forging die where a die part to forge a work is made a ceramics die 20, and the ceramics die to clamp and support the ceramics die 20 by a clamed die 22 is used, the ceramics die 20 is clasped and supported by the clamped die 22 by the minimum clamping force required to clamp and support the ceramics die 20 in the actual forging operation for the ceramics die 20. The clamped die 22 is formed large enough to prevent the shock force exerting on the clamped die 22 from being exerted on the ceramics die 20 as the excessive load to the applying force of the ceramics die 20 to be required to forge the work.

5. 发明专利

JPS62170415A HARDENING METHOD UTILIZING WATER SOLUBLE HARDENING AGENT 失效
公开(公告)号：JPS62170415A
公开(公告)日：1987-07-27
申请号：JP1273586
申请日：1986-01-23
申请人： NAGANO TANKO KK
发明人： YAMAMOTO HIROYUKI , ISHII SHIGEO , ODAGIRI KICHIJI , NISHIYAMA FUMITAKE
IPC分类号： C21D1/63 , C21D1/18 , C21D1/60
摘要： PURPOSE:To produce hardened forgings having high quality without quenching cracks by injecting cooling water of a specific liquid temp. in which a specific water soluble org. hardening agent is dissolved to the forgings in the stage of hardening the forgings. CONSTITUTION:While the forgings such as mechanical parts and automobile parts are dropped in a square cylindrical body 12 in a water tank 10 of a hardening device 18, the cooling water is injected from many diagonal upward injection nozzles 14 and diagonal downward injection nozzles 30 to uniformly cool and harden the surfaces of the forgings in the stage of hardening the above- mentioned forgings. The forgings are further dropped onto a chain conveyor 20 provided in the bottom of the water tank and are cooled with upward cooling water injection nozzles 42 in the mid-way of ejecting the same to the outside of the water tank. The cooling water for hardening of 40-60 deg.C temp. prepd. by dissolving the water soluble org. hardening agent such as polyalkylene glycol or PVA at 15-20% concn. in the water is used as the cooling water for hardening to be used in this case. Quality deterioration such as quenching cracks, ununiform hardening is thus prevented.

6. 发明专利

JPH0216367B2 失效
公开(公告)号：JPH0216367B2
公开(公告)日：1990-04-17
申请号：JP1273486
申请日：1986-01-23
申请人： NAGANO TANKO KK
发明人： YAMAMOTO HIROYUKI , ISHII SHIGEO , ODAGIRI KICHIJI , NISHAMA FUMITAKE
IPC分类号： C21D1/63 , C21D1/18 , C21D1/64

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