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1. 发明专利

JPH0631517A STEP DRILL 失效
公开(公告)号：JPH0631517A
公开(公告)日：1994-02-08
申请号：JP18917992
申请日：1992-07-16
申请人： KOBE STEEL LTD
发明人： WAKIHIRA KOICHIRO , KATSUTA MICHITAKA , HINO MASAYASU , SASAYAMA TOSHIO
IPC分类号： B23B51/08
摘要： PURPOSE:To form a bolt hole having a flat seat face providing a good seat for a bolt head by setting the radial alignment of cutting face of a large dia. edge to be a specified value. CONSTITUTION:Large dia. edges 21, 22 of a step drill are set in its cutting face radial alignment alpha to be from -3 deg. to +3 deg.. Under the conditions the large dia. edges 21, 22 perform cutting at about the center of the drill and thus a conical face is finished such that the chamfered part becomes the linear slant face in the dia. direction and contacting with the bolt head is obtained over almost the whole surface, thereby improving the seating condition. When cutting of the large dia. edges 21, 22 is made at the center of the drill, no minute oscillation is generated at the time of working and no chipping occurs on the edges, thereby improving the service life of the drill.

2. 发明专利

JPH0424424B2 失效
公开(公告)号：JPH0424424B2
公开(公告)日：1992-04-27
申请号：JP16918386
申请日：1986-07-18
申请人： KOBE STEEL LTD
发明人： YAMADA YASUYUKI , KATSUTA MICHITAKA , HINO MASAYASU , TEZAKI MUNEAKI , MORIMOTO TOSHIAKI
IPC分类号： C23C14/06 , C23C14/24 , C23C14/32

3. 发明专利

JPH03117507A DRILL 失效
公开(公告)号：JPH03117507A
公开(公告)日：1991-05-20
申请号：JP25541689
申请日：1989-09-29
申请人： KOBE STEEL LTD
发明人： WAKIHIRA KOICHIRO , KATSUTA MICHITAKA , HINO MASAYASU , SASAYAMA TOSHIO
IPC分类号： B23B51/00
摘要： PURPOSE:To improve the chamfer at the time of drilling of glass fiber reinforced material and to improve the working accuracy by making the included angle of a drill tip edge within the range of 98 - 112 deg. and making the included angle of a shoulder edge within the range of 50 - 60 deg.. CONSTITUTION:The included angle (alpha) of a tip edge 1 having a flank 3 is decided within the range of 98 - 112 deg., and the included angle beta of a shoulder edge 2 having a flank 4 is decided within the range of 50 - 60 deg.. Due to this included angle alpha being larger than that for aluminum material and smaller than that for steel material, the centripedal property enough for drilling of a glass fiber reinforced material, a proper cutting thrust and edge tip strength are obtained. Also due to the included angle beta being larger than that for aluminum material and smaller than that for steel material, a sufficient edge tip strength is obtained, the variation of the resistance in drawing out is reduced than for steel material as well, there is no generation of burrs and whiskers and the damage of the material to be cut is also eliminated.

4. 发明专利

JPH01140908A DRILL FOR WORK OF THIN SHEET 失效
公开(公告)号：JPH01140908A
公开(公告)日：1989-06-02
申请号：JP19639788
申请日：1988-08-04
申请人： KOBE STEEL LTD
发明人： WAKIHIRA KOICHIRO , KATSUTA MICHITAKA , HINO MASAYASU , SASAYAMA TOSHIO
IPC分类号： B23B51/00
摘要： PURPOSE:To strengthen tip blades, and thereby contrive to reduce the occurrence of chipping by forming one flank extending continuously toward the back sides in both the inner and outer circumferential directions of respective tip ends, and thereby securing the wall thickness of back metals against respective tip blades. CONSTITUTION:A drill tip is equipped with both a pair of tip blades and a chisel blade 3 connecting each tip blade, and each tip blade is sectioned into a tip inner blade 1 positioned at the inner side in the radial direction and tip outer blade 2 positioned at the outer side in the radial direction. And a pair of the tip inner blades 1 and 1 forms a chamfer projecting out of the tip outer blades 2 and 2 toward the drill tip side. Namely, each tip inner blade 1 is formed in such a way as to be projected ahead toward the drill tip direction with respect to each tip outer blade 2 as it goes to the chisel blade 3. n addition, respective flanks 5a and 6a extending continuously are formed on the back face in the circumferential direction of each tip inner blade 1 and each outer blade 2.

5. 发明专利

JPH0532163B2 失效
公开(公告)号：JPH0532163B2
公开(公告)日：1993-05-14
申请号：JP24082786
申请日：1986-10-09
申请人： KOBE STEEL LTD
发明人： WAKIHIRA KOICHIRO , KATSUTA MICHITAKA , HINO MASAYASU , MATSUMOTO KOHEI , NAKAHARA YOSHIO , SASAYAMA TOSHIO
IPC分类号： B23B51/00

6. 发明专利

JPH0523886B2 失效
公开(公告)号：JPH0523886B2
公开(公告)日：1993-04-06
申请号：JP24586786
申请日：1986-10-15
申请人： KOBE STEEL LTD
发明人： WAKIHIRA KOICHIRO , KATSUTA MICHITAKA , HINO MASAYASU , KOSAKA TOMOKICHI , SASAYAMA TOSHIO
IPC分类号： B23D77/00 , B23B51/02

7. 发明专利

JPH02311211A CEMENTED CARBIDE DRILL 失效
公开(公告)号：JPH02311211A
公开(公告)日：1990-12-26
申请号：JP13437789
申请日：1989-05-26
申请人： KOBE STEEL LTD
发明人： WAKIHIRA KOICHIRO , KATSUTA MICHITAKA , HINO MASAYASU , SASAYAMA TOSHIO , IKEDA TSUTOMU
IPC分类号： B23B51/00
摘要： PURPOSE:To prevent the occurrence of tipping and elongate the life of a drill by coating titanium, aluminum, nitride or the like on a negative land in the outer peripheral end of a cutting edge while setting a radial rake angle to angle of -20 deg. or more and -7 deg. or less. CONSTITUTION:The radial rake angle alpha of a negative land 4 on the outer peripheral side end of a cutting edge 3 of a cemented carbide drill is a negative rake angle set to the range from -7 to -20 deg.. Further, the edge of the drill is coated with 2.5-3.5mum thick film of titanium, aluminum, nitride or the like. Thus, the heat resisting property is improved while the heat conducting property is improved so that the rake angle can be enlarged and tipping is prevented from occurrence while the antiwear property is improved.

8. 发明专利

JPS61274810A METAL CUTTING CIRCULAR SAW 失效
公开(公告)号：JPS61274810A
公开(公告)日：1986-12-05
申请号：JP11448885
申请日：1985-05-28
申请人： KOBE STEEL LTD
发明人： ISODA SHIGEO , MOTONISHI SUGURU , KAKIHARA KUNIO , YAMASATO KAZUO , KISHIMOTO KOICHI , HINO MASAYASU
IPC分类号： B23D61/02 , B23D63/18
摘要： PURPOSE:To improve cutting efficiency and cutting accuracy, by pressurizing a circular part in a radius of 40-73% the external radius in both side surfaces and generating internal stress of compression to be left in the pressurized part so as to prevent a chattering vibration during cutting. CONSTITUTION:A circular saw 1 has in its both side surfaces 1a two circular pressurized parts 1b, 1c of different diametric size. A radius of said two circular pressurized parts 1b, 1c, if assumed R for radius of the circular saw 1, is in a value of 0.73R-0.40R. In the case of the drawing, as an example, the radius is respectively in a value of 0.70XR, 0.60XR. The above pressurized parts 1b, 1c are easily constituted by roll pressurization as shown in the bottom drawing. That is, the circular saw 1, arranging in its both side surfaces 1a, 1a a pair of pressurizing rolls 2a, 2b to be mutually opposed and moving each pressurizing roll 2a, 2b in the direction of an arrow head in the drawing to pressurize the circular saw 1 while gradually rotating each pressurizing roll 2a, 2b, forms the circular pressurized parts. The circular saw enables internal stress of compression to be left in the pressurized part by applying said pressurizing process. This residual stress is generated to, for instance, 20-30kg/mm .

9. 发明专利

JPH0780714A ULTRA-HARD DRILL 失效
公开(公告)号：JPH0780714A
公开(公告)日：1995-03-28
申请号：JP22854793
申请日：1993-09-14
申请人： KOBE STEEL LTD
发明人： HINO MASAYASU , ABE KAZUMASA , IKEUCHI HIROSHI
IPC分类号： B23B51/00
摘要： PURPOSE:To provide an ultra-hard drill capable of drilling material-to-be-cut having a hardness of about HRC 60, and without causing edge breakage in working a through hole. CONSTITUTION:This ultra-hard drill is composed of ultra-hard material such as hard metal, cermet, or ceramic. Thinning is applied to the tip surface of a drill. The diameter of a core thickness part 7 has 0.3D or more when a drill diameter is represented as D. A tip angle alpha is set within a range of 135-145 deg.. In a cutting blade outer peripheral part, chamfering 3 is applied by a angle betaof 10-15 deg. to a tip surface at a width of 0.1-0.15D. Blade smoothing 8 is applied to a cutting blade 4 at a width T of 0.01-0.05mm. The twisted angle theta of a chip discharge groove 1 is preferably set within a range of 14-16 deg.. The ultra-hard thin film such as titanium compound is better coated.

10. 发明专利

JPH0523885B2 失效
公开(公告)号：JPH0523885B2
公开(公告)日：1993-04-06
申请号：JP24082986
申请日：1986-10-09
申请人： KOBE STEEL LTD
发明人： WAKIHIRA KOICHIRO , KATSUTA MICHITAKA , HINO MASAYASU , YAMAMOTO TADAO
IPC分类号： B23D77/00 , B23B51/02

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