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1. 发明专利

JPS63162118A ELECTRIC DISCHARGE PROCESSING CUT WIRE 失效
公开(公告)号：JPS63162118A
公开(公告)日：1988-07-05
申请号：JP31550586
申请日：1986-12-22
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： KOKITA HIDEO , MIZUHARA MAKOTO , AOKI YOSHIMITSU , YAMAMOTO SUSUMU
IPC分类号： B23H7/08 , H01B5/02
摘要： PURPOSE:To enhance the tensile strength and heat resistance of a cut wire under normal and high temperature conditions by forming the cut wire in a three layer cross-sectional structure having an outermost brass layer, a second copper layer and an austenite group stainless steel core. CONSTITUTION:A cut wire has a three layer cross-sectional structure having an outermost brass layer 3, a second copper layer 2 and an austenite group stainless steel core 1. With this arrangement, due to the contribution of the austenite group stainless steel core 1, the entire tensile strength and high temperature resistance strength of the cut wire are increased so that the wire is hard to break, and therefore, working is not interrupted while a manless process using an automatic processing machine is made to be possible. Further, the provision of the second copper layer 2 ensures a sufficient electric conductivity so that a higher capacity current may be fed. Since the wire cut has a high strength and is therefore never softened even though a high capacity current is fed, it is possible to enhance the tensile strength of the out wire, resulting in an increase in processing speed. Further, the brass layer 3 is more evaporative than the steel so that adhesive to a workpiece is decreased due to the evaporation of the brass layer, and therefore, a cut surface having a satisfactory surface roughness may be obtained.

2. 发明专利

JPS6232249B2 失效
公开(公告)号：JPS6232249B2
公开(公告)日：1987-07-14
申请号：JP16904782
申请日：1982-09-27
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURAI TERUYUKI , KOKITA HIDEO , TAKAKURA SEIZO
IPC分类号： C21D8/00 , C21D1/18 , C21D8/06

3. 发明专利

JPS6110015B2 JPS6110015B2 - 失效
公开(公告)号：JPS6110015B2
公开(公告)日：1986-03-27
申请号：JP11777679
申请日：1979-09-13
申请人： Sumitomo Electric Industries
发明人： KOKITA HIDEO , NAKADA SHUICHI , NISHIMURA YOSHIFUMI
IPC分类号： C21D9/52 , C21D9/00 , C21D9/573
CPC分类号： C21D9/5732

4. 发明专利

JPS5934773B2 JPS5934773B2 - 失效
公开(公告)号：JPS5934773B2
公开(公告)日：1984-08-24
申请号：JP3542377
申请日：1977-03-31
申请人： Sumitomo Electric Industries
发明人： KOKITA HIDEO , NAKADA SHUICHI
IPC分类号： C21D9/52 , C21D1/78 , C21D9/56
CPC分类号： C21D1/78

5. 发明专利

JPS58188198A Method of producing radio wave absorber 失效
公开(公告)号：JPS58188198A
公开(公告)日：1983-11-02
申请号：JP7208782
申请日：1982-04-28
申请人： Sumitomo Electric Industries
发明人： ISHIKURA SHIYOUICHI , IWATA KOUICHI , KOKITA HIDEO , TAKAHASHI HIDEO
IPC分类号： B32B37/00 , B29C47/00 , B29C47/50 , B29C57/00 , B29C63/00 , H01F1/00 , H01Q17/00 , H05K9/00
CPC分类号： B29C47/50

6. 发明专利

JPS58130226A MANUFACTURE OF STEEL WIRE WHICH IS EXCELLENT IN SPRING WORKABILITY 失效
公开(公告)号：JPS58130226A
公开(公告)日：1983-08-03
申请号：JP1386482
申请日：1982-01-29
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURAI TERUYUKI , KOKITA HIDEO
IPC分类号： C23C8/18 , B21F3/00 , C21D9/52
摘要： PURPOSE:To manufacture a steel wire which is excellent in spring workability, easily and at a low cost, by heating the steel wire in vapor, and forming a magnetite film having thickness of some extent or more uniformly in the circumferential direction, on the surface of the steel wire. CONSTITUTION:When a steel wire such as an oil temper wire, etc. is treated at a temperature of 300-570 deg.C in vapor, for 10min-1hr or so desirably, a magnetite (Fe3O4) film having uniform thickness of at least 2mum in the circumferential direction is formed on the surface of the steel wire. The magnetite film has a good adhering property to base iron, also is small in a coefficient of friction, shows a lubricating property between a working tool and the steel wire when working a spring at a high speed, does not generate seizure, bounce, etc. on the surface of the wire, becomes capable of working a spring at a high speed, also the working accuracy is elevated, and it is possible to manufacture a steel wire for a spring, which is excellent in workability of a spring.

7. 发明专利

JPS5763245A Fluorine resin coating steel wire for spring 失效
标题翻译：氟树脂涂层钢丝弹簧
公开(公告)号：JPS5763245A
公开(公告)日：1982-04-16
申请号：JP13915280
申请日：1980-10-04
申请人： Sumitomo Electric Industries
发明人： KOKITA HIDEO , MIZUHARA MAKOTO
IPC分类号： B05D7/14 , B05D7/20 , B32B15/02

8. 发明专利

JPS56108825A MANUFACTURE OF HARD DRAWN* HIGH CARBON STEEL WIRE OF HIGH TOUGHNESS 失效
公开(公告)号：JPS56108825A
公开(公告)日：1981-08-28
申请号：JP1111180
申请日：1980-02-01
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： KOKITA HIDEO , NIWA TSUTOMU , NAKADA SHIYUUICHI , TAKAKURA SEIZOU
IPC分类号： B21C1/00 , C21D7/02 , C21D8/00 , C21D8/08
摘要： PURPOSE:To impart high toughness to high carbon steel wire, by bending the steel wire repeatedly between drawing processes. CONSTITUTION:Plural roll stands 1 constituted of many rolls, which satisfy a relation d/D=0.03-0.15, where (d) is the diameter of steel wire 3, D is the diameter of the rolls 2, are arranged in two or more directions on a circumference, and the steel wire 3 travels through between the rolls 2. Hereby, the steel wire 3 is subjected to bending repeatedly over the whole length of the steel wire 3 continuously at a >=5 deg. angle. Final drawing after bending is performed at 5-25% reduction of area, and the steel wire 3 is drawn at

9. 发明专利

JPS5617866A GUIDE ROLL FOR WIRE 失效
公开(公告)号：JPS5617866A
公开(公告)日：1981-02-20
申请号：JP9202679
申请日：1979-07-19
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： KOKITA HIDEO , MATSUSHIMA NORIHISA
IPC分类号： B65H57/14
摘要： PURPOSE:To provide a satisfactory drain of guide roll for a wire by providing drain holes extending from the bottom to the side of the guide groove. CONSTITUTION:A drum of a guide roll 1 is provided on the outer periphery with annular projections 2 having a guide groove 3, and a plurality of small through- holes 6 extending from the bottom of the guide groove 3 to the side 5 of the annular projection 2 are provided on the outer periphery. When steel wire 11 is trained over the guide roll 1 for use, water (or solution) attached to the steel wire 11 is attached to the groove 3 of the guide roll 1 and absorbed into the many small through holes 6 by capillarity to be discharged from the side 5. Discharged water is severed from the guide roll 1 by centrifugal force or gravity to be dropped. The inlet portion for the steel wire 11 where it contacts the rotating roll 1 has almost dried inside of the guide groove 3, and water attached to the steel wire 11 is removed as it passes by the guide roll 1.

10. 发明专利

JPS5617132A MANUFACTURE OF TAPERED STEEL PIPE FOR USE OF COIL SPRING 失效
公开(公告)号：JPS5617132A
公开(公告)日：1981-02-18
申请号：JP9391379
申请日：1979-07-23
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： KOKITA HIDEO , HASHIMOTO YOSHIHIRO
IPC分类号： B21C37/16 , B21C37/00 , B21D26/033 , B21D26/047 , B21D51/16
摘要： PURPOSE:To manufacture the titled steel pipe at greatly improved yield as compared with the conventional method, by introducing the steel pipe into the die provided with the cavity of shape desirable for the blank of the titled steel pipe, and by heating to soften this steel pipe under the condition that its inside is kept at high pressure, and then, by forming the steel pipe into the shape of the forming cavity. CONSTITUTION:At manufacturing the titled steel pipe, the steel pipe A is inserted into the die 3 consisting of two segments forming the cavity 6 (consisting of the terminal zone 6a of diameter equal to outer diameter of the steel pipe A, the middle large diameter zone 6b, and the tapered zone 6c) to form the desirable shape as the material of the coil spring; while the inside of this steel pipe A is kept at high pressure, the electricity is supplied to the high frequency coil 7 possible to freely move in the longitudinal direction together with the backup rolls 8 in order to heat and soften the steel pipe A at the part lying in the forming cavity 6; the steel pipe A is taken out after being tight pressed to the inner wall of the cavity 6, and is cut into the specified length by the cutter; hereby, the titled steel pipe is obtained. Accordingly, the yield is greatly improved as compared with the cutting work, and the work is efficiently performed without making noise.

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