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31. 发明专利

JP2001334345A FORGING METHOD OF HOLLOW FORGING 失效
公开(公告)号：JP2001334345A
公开(公告)日：2001-12-04
申请号：JP2000151800
申请日：2000-05-23
申请人： HONDA MOTOR CO LTD
发明人： YAMAMOTO MAMORU , AKIMOTO SEIICHI , KIHARA TAKASHI
IPC分类号： B21D53/88 , B21J5/02 , B21K1/12 , B21K21/08
摘要： PROBLEM TO BE SOLVED: To form a work having a hollow portion without using any jig or the like, to shorten the forming time, and to form the work having a hollow portion of different diameter. SOLUTION: A non-compressible substance or a filler 254 having an extremely small coefficient of compressibility, preferably, wax, fusible alloy or agar is filled in the hollow portion 252 formed in a billet 250, and the billet 250 is housed in a cavity 70. A punch 86 is displaced in the perpendicular down direction under the operation of a driving mechanism, and the billet 250 is pressed downwardly in the perpendicular direction by a punch 86 to allow the billet 250 to flow into the cavity 70.

32. 发明专利

JP2001121240A METHOD FOR PRODUCING MAIN BODY METAL FITTING FOR SPARK PLUG 失效
公开(公告)号：JP2001121240A
公开(公告)日：2001-05-08
申请号：JP30020999
申请日：1999-10-21
申请人： DENSO CORP
发明人： TANAKA KAZUHIKO , NISHIWAKI HIROFUMI
IPC分类号： B21K21/08 , B21C23/20 , H01T21/02
摘要： PROBLEM TO BE SOLVED: To provide a producing method of a main body metal fitting for spark plug, by which a tapered part can be formed into a desired shape by a cold-forging, in the cylindrical main body metal fitting for spark plug having the tapered part for executing the seal on the outer peripheral surface. SOLUTION: The first member 20 to be worked, provided with a first tapered part 23 having the tapered angle A is formed in the first process. In the second process, the first tapered part 23 is deformed into a second tapered part 33 having the tapered angle B by using a second forming die 62 provided with a tapered seat surface 68 having the tapered angle B larger than the tapered angle A in a stepped inner hole 65. In the third process, the second tapered part 33 is deformed into a third tapered part 43 having the tapered angle C by using a third forming die 63 provided with a tapered seat surface 69 having the tapered angle C smaller than the tapered angle B in a stepped inner hole 66, and a third punch member 73 having the outer diameter at the front end part 73b smaller than the outer diameter of a small diameter leg part in a second member 30 to be worked.

33. 发明专利

JP2001038443A METAL PLATE MEMBER AND ITS MANUFACTURE 失效
公开(公告)号：JP2001038443A
公开(公告)日：2001-02-13
申请号：JP21378499
申请日：1999-07-28
申请人： KANEMITSU KK
发明人： KANEMITSU TOSHIAKI , TAKAHASHI YASUHIRO , HARADA KUNIHIRO
IPC分类号： B21C37/29 , B21J5/02 , B21K21/00 , B21K21/08 , B21K23/04 , B60R21/26 , B60R21/264
摘要： PROBLEM TO BE SOLVED: To provide a method for easily manufacturing a metal plate made member with limited process, and without yielding a material loss at a low cost, wherein a disc like steel plate blank is used, and having a cylindrical shape boss part, a flange part integrally stretching out in all round outer direction of the boss part 1 and an inward facing collar part being pile-up formed at an inner periphery of the boss part at an axial direction intermediate part. SOLUTION: A half-finished good 4 having a cylindrical boss part 1 made of a thin disc like blank, and a flange part 2 integrally stretching out in all round outer side of the boss part is clamped between an upper die 6 (10, 14, 17) and a bottom die 8 (12, 16, 19). A squeezing punch 5 (9, 13) of the upper die is pushed into the boss part 1 from above and a squeezing punch 7 (11, 15) of the bottom die is pushed into the boss part 1 from the bottom respectively. Inner peripheral wall of the boss part 1 is thereby squeezed thin and an inward facing collar part 3 is piled up and formed in the axis center direction on the inner peripheral of an axial direction mid part of the boss part 1.

34. 发明专利

JP2000140992A WELDING CHIP, AND ITS MANUFACTURE 失效
公开(公告)号：JP2000140992A
公开(公告)日：2000-05-23
申请号：JP31589298
申请日：1998-11-06
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIMOTO KIYOSHI , KUWAGAKI MASAO , KONISHI KEIICHI
IPC分类号： B23K9/26 , B21K21/08 , B23K1/00
摘要： PROBLEM TO BE SOLVED: To provide a welding chip which is excellent in wear resistance and productivity by coupling a plurality of split parts with each other which are provided with a holding part on one end and split in the passing direction of a welding wire around an inside hole to pass the welding wire to form a hole which is small in diameter, long in energization length, free from any bend, and smooth in surface. SOLUTION: An upper stock is cut out of a parts 13 obtained by pressing an upper chip stock into a semi-circular shape, and formed into a parts 14, and then formed into a parts 15 through the external trimming and stamping. An upper side chip 16 is formed by grooving the inside diameter of the upper chip in the parts 15, and pressing projecting and recessed parts for tightening. Similarly, a lower side chip 20 is formed. The upper side and the lower side chips 16, 20 are combined with each other to form an integrated welding chip 21. A welding chip 22 is formed through the smoothing of a contact surface, and a slight cutting such as round R-machining of a tip part, and a screw of a holding part to be coupled with a welding torch is form-rolled to finish a welding chip 23. Chips are manufactured with excellent productivity by employing many pressing works.

35. 发明专利

JP2000140991A CONNECTOR BOLT AND ITS PRODUCTION 失效
公开(公告)号：JP2000140991A
公开(公告)日：2000-05-23
申请号：JP31305698
申请日：1998-11-04
申请人： MATSUMOTO JUKOGYO KK
发明人： MATSUMOTO HISASHI , ASANOMA HIROYUKI , YOKOTA KOICHI
IPC分类号： B21H3/02 , B21J5/06 , B21J5/08 , B21K1/16 , B21K1/46 , B21K21/08 , F16B35/00 , F16B35/04 , F16L33/24
摘要： PROBLEM TO BE SOLVED: To provide a production method of a connector bolt having a high sealing property and high strength of a hose fitting part. SOLUTION: In producing a connector bolt, cold forging reduction is applied to a tube stock 1, a thin wall cylindrical part 3 is formed to one end part side, a thick wall cylindrical part 4 is formed to the other end side. Cold upsetting is applied to a thick wall cylindrical part 4 to form a screw fastening part 5. Successively, a hose coming off stop part 6 is formed to the thin wall cylindrical part 3 by bulging. Further, a male thread 7 is formed to the thick wall cylindrical part 4. A connector bolt C is finished by applying a surface treatment. Thus, the connector bolt C having a high sealing property and high strength of a hose fitting part 3 is obtained.

36. 发明专利

JP3023353B1 失效
公开(公告)号：JP3023353B1
公开(公告)日：2000-03-21
申请号：JP31305698
申请日：1998-11-04
IPC分类号： B21H3/02 , B21J5/06 , B21J5/08 , B21K1/16 , B21K1/46 , B21K21/08 , F16B35/00 , F16B35/04 , F16L33/24

37. 发明专利

JP2000015387A FORMATION OF HOLLOW BALL STUD 失效
公开(公告)号：JP2000015387A
公开(公告)日：2000-01-18
申请号：JP18359598
申请日：1998-06-30
申请人： MUSASHI SEIMITSU KOGYO KK
发明人： KAWACHI MASUO
IPC分类号： B21J5/06 , B21J5/08 , B21K1/14 , B21K21/08
摘要： PROBLEM TO BE SOLVED: To provide a method for forming a hollow ball stud having high precision in a ball head part. SOLUTION: This forming method is composed of a pipe forming process for forming a cylindrical pipe material W3 having almost the same outer diameter as the outer diameter of the ball head part 8 in ball stud W5, a draw- forming process for forming shaft parts by contracting the diameters of the end parts in the pipe material W3 and also, forming a pre-projecting part 6 leaving the straight part 6a having the same outer diameter as the pipe material in the outer periphery at the center part in the axial direction in the unforming part and a finishing process for forming the pre-projecting part 6 to the spherical surface state by pressing the pre-projecting part 6.

38. 发明专利

JP2971334B2 失效
公开(公告)号：JP2971334B2
公开(公告)日：1999-11-02
申请号：JP20344194
申请日：1994-08-29
申请人： HINO JIDOSHA KOGYO KK
发明人： OOTAKA HIDEKI , YANO HIROYUKI
IPC分类号： B23P15/16 , B21D28/24 , B21K21/08 , F02M51/06 , F02M61/18

39. 发明专利

JPH11230450A MANUFACTURE OF A METAL FITTING FOR HOSE, METAL FITTING FOR HOSE, AND BRAKE HOSE 失效
公开(公告)号：JPH11230450A
公开(公告)日：1999-08-27
申请号：JP3313498
申请日：1998-02-16
申请人： HITACHI CABLE
发明人： NAMEKAWA YOSHIHIRO , HAGIWARA HIDEKI , AOYANAGI KATSUHIRO
IPC分类号： F16L33/20 , B21D53/88 , B21K21/08
摘要： PROBLEM TO BE SOLVED: To reduce an end product cost by improving a material yield, and to improve reliability by reducing the occurrence of the defective seal function of a seal part. SOLUTION: A cylindrical socket part 1 and a cylindrical nipple part positioned at the internal part of the socket part are arranged on one end side, and a screw part in which a joint member is screwed, a communicating hole to communicate the hollow part of the nipple part to the screw part, and a seal part formed at the opening edge part of the communication hole are arranged on the other end part side. Manufacturing method of this metal fitting for a hose comprises a first process wherein an intermediate molded product having a cylindrical part 11 corresponding to a socket part, a protrusion part 12 corresponding to the nipple part, a part (an inner surface 13) corresponding to a screw part, and a part (a truncated part 16) corresponding to a seal part 6 is manufactured through plastic working; a second process wherein heat treatment to relax work hardening occurring to the intermediate molded product is applied on the intermediate molded product; and a third process wherein plastic working is applied on the intermediate molded product to manufacture a metal fitting for a hose being a final product.

40. 发明专利

JPH11197780A MANUFACTURE OF STEPPED ANNULAR MEMBER, AND INNER AND OUTER RING MEMBER 失效
公开(公告)号：JPH11197780A
公开(公告)日：1999-07-27
申请号：JP1638498
申请日：1998-01-12
申请人： NIPPON KOSHUHA STEEL CO LTD
发明人： IMAI KATSUYA , KAWADA YOKO , FURUSAWA SADAYOSHI , NAKADA MITSUAKI , OKAMOTO SATORU , IRISAWA KATSUFUMI
IPC分类号： B21J5/06 , B21K1/04 , B21K21/08
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method in which the concentricity of each inside diameter and outside diameter of a large diameter cylindrical part and a small diameter cylindrical part of a forged stepped annular member can be machined with high accuracy, the cutting of the inside and outside diameter sides can be dispensed with, and the grinding can be directly performed. SOLUTION: In a forging method in which a disk-like stock 34' is forged or extruded to form a stepped annular member 43 where a large diameter cylindrical part 35 is concentrically connected to a small diameter cylindrical part 38 through a connection part 42, a recessed part 35A of the diameter slightly smaller than the inside diameter of a large diameter part of a product is formed on one surface side of the disk-like stock, and a cup-like stock 37 having a projecting part 36 is formed on the other surface side, a small diameter cylindrical part side of a stepped annular member is formed by the forward extrusion so that a die and a punch are not relatively moved to each other in the projecting part, an inner surface of the recessed part is ironed or extruded by the forward extrusion method to form the inside diameter of the recessed part to be the same as that of a large diameter part of the product, and a bottom plate part 38 on the inside diameter side of the small diameter cylindrical part is punched to communicate the recessed ports of the large diameter cylindrical part 35 and the small diameter cylindrical part. communicate the recessed part of the large diameter cylindrical part 35 with that of the small diameter cylindrical part 38.

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