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21. 发明专利

JPH07112204A METHOD FOR GRINDING ROLL 失效
公开(公告)号：JPH07112204A
公开(公告)日：1995-05-02
申请号：JP26064793
申请日：1993-10-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： EGAWA TSUNEO , HIASA YUKIO , HAYASHI KANJI , YOKOTA SHOZO
IPC分类号： B24B5/37 , B21B28/04
摘要： PURPOSE:To provide a highly efficient method for grinding the roll surface of a rolling roll or the like. CONSTITUTION:In the method for grinding rolls in which the rotary shaft of a grinding wheel 12 is installed offsetting a prescribed amount from the axial center of a rotating roll 11, the front side of the grinding wheel is pressed aginst the roll by forcedly driving the grinding wheel and grinding is executed while reciprocating the grinding wheel in the axial direction of the roll, the number of revolution of the roll 11 and offset amount j (e) are controlled in accordance with the necessary grinding amount of the roll to be ground.

22. 发明专利

JPH04304968A METAL BOND SUPER HARD POLISHING POWDER GRINDING STONE 失效
公开(公告)号：JPH04304968A
公开(公告)日：1992-10-28
申请号：JP6990491
申请日：1991-04-02
申请人： MITSUBISHI HEAVY IND LTD
发明人： EGAWA TSUNEO , ICHIKIZAKI TETSUO , HIASA YUKIO , YOSHIOKA HAJIME , KOIZUMI AKIHISA
IPC分类号： B24D3/00 , B24D3/10
摘要： PURPOSE:To increase the strength of a metal bond to hold super hard polishing powder and to achieve enhancement of the grinding ability, automation and reduction in the consumption of polishing powder in a grinding stone comprising super hard polishing powder of CBN or the like solidified by the metal bond by applying coating layers of ceramics to the super hard polishing powder. CONSTITUTION:A metal bond super hard polishing powder grinding stone comprises super hard polishing powder of CBN or diamond solidified by a bond of metal base. In this case, a coating layer of ceramics is applied to the super hard polishing powder. Also, coating layers the innermost one of which is made from ceramics are applied to the super hard polishing powder. The ceramics is a nitride or a boride. Polishing powder 11 made of e.g. CBN is fixed by a metal bond of Ag or other elements and air holes 13 are provided. The surface of the polishing powder 11 is coated with both a TiN layer 14 of film thickness 1mum and a Ti layer 15 of film thickness 1mum by CVD or PVD method: The strength of the metal bond 12 to hold the polishing powder 11 is thus increased.

23. 发明专利

JPH04189411A BALL END MILL AND WORMING METHOD USING THE SAME 失效
公开(公告)号：JPH04189411A
公开(公告)日：1992-07-07
申请号：JP31623390
申请日：1990-11-22
申请人： MITSUBISHI HEAVY IND LTD
发明人： EGAWA TSUNEO , YOSHIOKA HAJIME , INAI FUMIO , FUKASAKU SHINICHI , FUJII EIJI
IPC分类号： B23C3/00 , B23C5/10
摘要： PURPOSE:To eliminate uncut portions by providing an annular cutting edge having the cutting edge located in an annular plane perpendicular to the rotary axis and an arcuate cutting edge surrounding the cutting edge and having the revolutional locus about the rotary axis showing an approximately spherical surface on the tip of a cylindrical mill body. CONSTITUTION:A cylindrical mill body 20 is formed on the tip coaxially with the axis 21 with an annular cutting edge 23 having the diameter (d) and the cutting edge 22 in a plane perpendicular to the rotary axis 21 and a conical relief surface 24 inside the annular cutting edge. Further, the annular cutting edge 23 is formed on the outer peripheral surface with a rake face 25. Two arcuate cutting edges 26, 27 making an approximately spherical surface of the rotary locus around the axis 21 are formed radically around annular cutting edge 23 and formed in the front face of the rotation direction with rake face 28, 29. Thus, while a planar groove having the width (d) and an arcuate surface contiguous to both sides of the planar groove due to the annular cutting edge 23 and cutting edges 26, 27 respectively are formed on the surface of a workpiece by the rotation of the mill, streaks and uncut conical portions are removed.

24. 发明专利

JPH0453681A VITRIFIED GRINDSTONE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH0453681A
公开(公告)日：1992-02-21
申请号：JP16132990
申请日：1990-06-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： EGAWA TSUNEO , HIASA YUKIO
IPC分类号： B24D3/00 , B24D3/18
摘要： PURPOSE:To largely reduce the consumption of a grindstone and to eliminate the shape break of the grindstone, by diffusing the cubic boron nitride grain coated with metal in a vitrified bond. CONSTITUTION:A cubic boron nitride grain 1 is coated with metal 2. A desired vitrified grindstone is obtained by sintering this after mixing with a vitrified bond 3.

25. 发明专利

JPH03294150A TOOL ABNORMALITY DETECTING METHOD 失效
公开(公告)号：JPH03294150A
公开(公告)日：1991-12-25
申请号：JP9206390
申请日：1990-04-09
申请人： MITSUBISHI HEAVY IND LTD
发明人： TSUKAMOTO EIHIKO , EGAWA TSUNEO , YASHIMA MINORU , ICHIKIZAKI TETSUO
IPC分类号： B23Q17/09
摘要： PURPOSE:To judge the degree of wear and defect and precisely detect the abnormality of a tool by emitting an ultrasonic wave to the cutting edge part of the tool from the inner part of the toll, and measuring the transmitting time and level of the reflected wave from the cutting edge part. CONSTITUTION:A probe 3 driven by a pulse transmitter 4 emits an ultrasonic wave 5 of vertical wave mode into the inner part of a chip 1 in such a manner that it is reflected near the cutting edge 1a of the chip 1, and the reflected wave entering the ultrasonic probe 3 is transformed into an electric signal and outputted to a gate circuit 7 through a receiver 6. The gate circuit 7 conforms the input signal with the corresponding section, and outputs the signal every section to a peak hold circuit 8, which circuit 8 holds the peak voltage every section and outputs its value to an A/D converter 9. A computer 10 reads the voltage every section through the A/D converter 9 and compares it with a standard value set every chip, and an abnormality, when present, is outputted to a working machine control unit 11.

26. 发明专利

JPH03294109A CUTTING METHOD WITH HIGH ACCURACY 失效
公开(公告)号：JPH03294109A
公开(公告)日：1991-12-25
申请号：JP9623390
申请日：1990-04-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： TSUKAMOTO EIHIKO , EGAWA TSUNEO , ICHIKIZAKI TETSUO
IPC分类号： B23C9/00 , B24B3/06
摘要： PURPOSE:To eliminate unevenness in height generated on a cutting surface so as to carry out cutting with high accuracy by rotating a grinding device arranged on a working table after attaching a multiple blade tool to a main shaft and by grinding a rotating cutting blade or a contact surface of a work to be cut of a chip. CONSTITUTION:A tool holder 1 on which a plurality of chips 2 are fixed at appropriate intervals is attached to a main shaft 10, a table 8 which is constituted with capability of sliding in the right and left direction is moved to bring a grinding stone 4 under the tool holder 1. Next, the grinding stone 4 is rotated, and a main shaft head 7 is brought down to make the grinding stone 4 cut deeper than the dispersion of the height between the chip 2, and the table 8 is moved right and left. Then, the dispersion of the height of the chip 2 can be held at least within the range of 1 to 2mum. When a work to be cut 3 is cut with such chips 2, the same surface roughness as required for grinding can be obtained.

27. 发明专利

JPH03205364A SINTERED MATERIAL FOR TOOL 失效
公开(公告)号：JPH03205364A
公开(公告)日：1991-09-06
申请号：JP7490
申请日：1990-01-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： TSUKAMOTO EIHIKO , EGAWA TSUNEO , ICHIKIZAKI TETSUO , FUKAYA YASUHIRO , TSUNODA HIDEO , YASUDA FUKUJI
IPC分类号： C04B35/583 , B23B27/14 , C04B35/58
摘要： PURPOSE:To obtain the subject sintered material having improved abrasion resistance at high temperature and adhesivity of a cubic boron nitride particle and a binder phase by sintering cubic boron nitride particles and a mixture of zirconium oxide particles and aluminum oxide particles after applying a metallic coating layer to the cubic boron nitride particles. CONSTITUTION:In the production of a sintered material for tool by the sintering of 40-90vol.% of cubic boron nitride particles and 5-55vol.% of a mixture of zirconium oxide particles and aluminum oxide particles, a metallic coating film is applied to the cubic boron nitride particle beforehand. Preferably, the cubic boron nitride has a particle diameter of 1-3mum and the thickness of applied metal (e.g. Al) is 10-1,000Angstrom .

28. 发明专利

JPH032348A BASE METAL FOR COATED SINTERED HARD ALLOY TOOL 失效
公开(公告)号：JPH032348A
公开(公告)日：1991-01-08
申请号：JP13452989
申请日：1989-05-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： TAKEDA YORIMASA , NOTOMI HIROSHI , TSUNODA HIDEO , EGAWA TSUNEO , TERAI HISANOBU , YASUDA FUKUJI
IPC分类号： B23B27/14 , C22C29/06 , C22C29/08 , C23C16/30
摘要： PURPOSE:To improve the plastic deformation of a base metal at the time when a coating film is worn, to prevent wear due to reaction with a material to be machined, and to prolong service life by producing a base metal for a coated sintered hard alloy by sintering a mixture of pulverized WC, (W, Ti)C, and TaC by the use of Co as a binding material. CONSTITUTION:In a cutting tool prepared by coating the surface of a hard base metal as a base material with super hard TiN, TiC, Al2O3, etc., the hard base metal is prepared by mixing 3-7%, by weight, Co as a metal for forming a binding phase at the time of sintering with a hard carbide mixture consisting of 55-65% WC of 2-5mum average grain size, 25-30% (W0.7Ti0.3)C of 1-2mum average grain size, and 8-12% TaC of 1-2mum average grain size, press-compacting the resulting mixture into the prescribed shape, and then sintering the resulting green compact in vacuum at a temp. as high as about 1400 deg.C. This sintered alloy is used as a base metal for a coated sintered hard alloy, and the surface of this alloy is coated with a thin film of TiN, TiC, Al2O3, etc.

29. 发明专利

JPH02282444A TOOL SINTERED MATERIAL 失效
公开(公告)号：JPH02282444A
公开(公告)日：1990-11-20
申请号：JP10026689
申请日：1989-04-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： TSUKAMOTO EIHIKO , EGAWA TSUNEO , ICHIKIZAKI TETSUO , HIRATA ISAO , YASUDA FUKUJI
IPC分类号： C04B35/583 , C04B35/58 , C22C29/12 , C22C29/16
摘要： PURPOSE:To manufacture the tool sintered material having improved wear resistance and reduced chipping and fracture by mixing CBN powder grains, PSZ powder grains and the powder grains of Al and Ti in specified ratios and sintering the mixture. CONSTITUTION:By volume, 40 to 90% cubic boron nitride(CBN) powder grains, 5 to 55% partially stabilized zirconia(PSZ) powder grains and 1 to 10% Al and/or Ti powder grains are uniformly. mixed and stirred. At this time, as a stabilizer for PSZ, yttrium oxide and the like are used. Next, the mixture is charged to a vessel of a high m.p. material; while pressurized to about 40 to 60Kb with an ultra high pressure apparatus by HIP or the like, it is heated to the temp. area of 1200 to 1800 deg.C and is held for about 0.5 to 30min. In this way, the tool sintered material having high hardness in the high temp. condition of about 600 to 800 deg.C can be obtd.

30. 发明专利

JPH0158250B2 失效
公开(公告)号：JPH0158250B2
公开(公告)日：1989-12-11
申请号：JP14804381
申请日：1981-09-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： OOMORI SHUNJI , HOZOJI AKIRA , TAKENAKA HIROYUKI , EGAWA TSUNEO
IPC分类号： C21D7/02 , C21D7/04

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