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1. 发明专利

JP2000005922A THROWAWAY TIP 失效
公开(公告)号：JP2000005922A
公开(公告)日：2000-01-11
申请号：JP17072898
申请日：1998-06-18
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO
IPC分类号： B23C5/20
摘要： PROBLEM TO BE SOLVED: To permit stable cutting work over a long period when the cutting work is performed with a throwaway tip attached to a corner-shaving cutting tool by suppressing nicks such as chipping-off at the lower ends of cutting blades on the outer periphery of the tool and to easily manufacture the throwaway tip. SOLUTION: In a throwaway tip, particularly that formed into a generally rectangular shape on plan view where the clearance angles of flanks 12 continuing with cutting blades 11 are varied stepwise from one end to the other of each cutting blade, the clearance angle of each flank continuing with the cutting blade on each of the four sides of the tip is varied stepwise from one end to the other of each cutting blade and the flank 12c of the greatest clearance angle and the flank 12a of the smallest clearance angle adjoin at each of corners (a), (b), (c), (d) where the cutting blades cross.

2. 发明专利

JPH11235613A DRILLING TOOL 失效
公开(公告)号：JPH11235613A
公开(公告)日：1999-08-31
申请号：JP3820398
申请日：1998-02-20
申请人： DIJET IND CO LTD
发明人： IKUTA TOSHIRO , INUI YASUYUKI , KUBOHORI TOSHIBUMI , FUJIMOTO KATSUHIRO , TAKAHASHI YASUTOMO
IPC分类号： B23B51/00
摘要： PROBLEM TO BE SOLVED: To reduce deviation of a hole location and enlargement of the hole diameter in performing a drilling process to an inclined surface or a curved surface, as well as to control burr development for an accurate and satisfactory drilling operation. SOLUTION: A drilling tool has cutting blades 11, 12 arranged from a rotational center O of a tip of a shaft 10 toward a periphery of the drilling tool, and also has chip ejection grooves 13a, 13b arranged on its shaft for ejecting drilled chips. Among the cutting blades 11, 12 which form approximately 180 degrees of the tip angle of the drilling tool and which extend in a direction from the rotational center toward the periphery, the central cutting blade 11 starts at the rotational center and ends halfway toward the periphery, while the periphery cutting blade 12 starts at halfway toward the periphery and ends at the periphery.

3. 发明专利

JPH10309617A THROWAWAY CHIP 失效
公开(公告)号：JPH10309617A
公开(公告)日：1998-11-24
申请号：JP16715798
申请日：1998-06-15
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO
IPC分类号： B23C5/06 , B23C5/20
摘要： PROBLEM TO BE SOLVED: To stably cut an article to be cut, so that the article to be cut may be efficiently cut by a throwaway chip attached to a milling cutter, cutting work may be performed in a short time, a machining surface may be finished into a flat and neat state, a main cutting edge and a sub cutting edge in the throwaway chip may not be damaged, and corner parts may be formed into the straight state. SOLUTION: In an approximately square throwaway chip to be attached to a milling cutter 1 and provided with a main cutting edge 14 and a sub cutting edge 12, a second flank surface 11b continuing to a first flank surface 11a in the main cutting edge and having the relief angle larger than that of the first flank surface is provided, the corner angle θc of the main rake edge is set in the range of ±3 deg., the axial rake angle γa is set in the range of 25 deg. ±5 deg., and the radial rake angle γr is set in the range of ±5 deg. in a state where the throwaway chip is attached.

4. 发明专利

JPH10138009A CORNER CUTTING THROW AWAY TIP AND THROW AWAY TYPE TURN CUTTING TOOL 失效
公开(公告)号：JPH10138009A
公开(公告)日：1998-05-26
申请号：JP29134296
申请日：1996-11-01
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO , ANDO MASAMITSU
IPC分类号： B23B27/14
摘要： PROBLEM TO BE SOLVED: To smoothly cut a cutting object so as the corner of the cutting object may be close to a square without damaging the outer circumferential cutting edge with regard to a throw away type turn cutting tool having a corner cutting throw away tip fitted to the outer circumferential end of the tool body. SOLUTION: A corner cutting throw away tip 10, which is composed of cutting edges 11a, 11b of their plane figures forming nearly a parallelogram and formed in at least two linear shapes with their outer circumferential cutting edges 11 crossing each other in a way of protruding a little to the outer circumferential side and which includes a first flank 12a of a flank 12 on the outer circumferential cutting edge 11 being a small clearance angle and a second flank 12b of a larger clearance angle than that of the first flank 12a, is fitted to the outer circumference of the tool body end so that the axial rake angle is within the range of 10 deg. ±5 deg., the radial rake angle is within the range of -20 deg. +10 deg., and the radius of gyration of the tip end and the rear end of the outer circumferential cutting edge 11 may coincide by using the corner cutting throw away tip 10.

5. 发明专利

JP2001293617A PREPARED HOLE CORRECTING TOOL 失效
公开(公告)号：JP2001293617A
公开(公告)日：2001-10-23
申请号：JP2000111443
申请日：2000-04-13
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO , SASAKI CHIKAO
IPC分类号： B23D79/04
摘要： PROBLEM TO BE SOLVED: To provide a prepared hole correcting tool that can straightly correct even a prepared hole distorted in cutting stock made of a high-hardness material. SOLUTION: The prepared hole correcting tool for correcting a prepared hole 2 cut in advance through cutting stock 1 has a plurality of cutting edges 13 of a given width on the tip periphery of a cylindrical tool body 10, and chip pockets 12 inclined from the center to the periphery of the tool body forward of the respective cutting edges in the direction of tool body rotation. An angle θ1 formed between a plane perpendicular to the center axis of the tool body and a bottom 12a of each inclined chip pocket is set smaller than an angle θ2 formed between a plane perpendicular to the center axis of the tool body and each cutting edge.

6. 发明专利

JPH11197906A ROUND SHAPE THROW-AWAY TIP OR THROW-AWAY CUTTING TOOL 失效
公开(公告)号：JPH11197906A
公开(公告)日：1999-07-27
申请号：JP325898
申请日：1998-01-09
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO , OZAWA MINORU
IPC分类号： B23B27/00
摘要： PROBLEM TO BE SOLVED: To restrain a cutting edge or the like of a round shape throw-away tip from being damaged during cutting so as to carry out stable cutting for a long time, by attaching the round shape throw-away tip onto a tool body with no play. SOLUTION: A round shape throw-away tip 10 in which a protrusion 13 is projected from the rear surface of a disc-like tip 11 formed at the periphery of its outer surface with a cutting edge 12, and in which an attaching hole 14 is formed piercing through the tip and the projection while a flat locking surface 14 is formed in the protrusion, is inserted with its protrusion into an attaching hole 21 in a tool body 20, and the locking surface 15 of the protrusion is joined to a flat joint surface 22 of an attaching part. In this condition, the round shape throw-away tip is fixed to the tool body by means of a fastening member 30 through the attaching hole 14.

7. 发明专利

JPH1015720A MILLING CUTTER 失效
公开(公告)号：JPH1015720A
公开(公告)日：1998-01-20
申请号：JP19533596
申请日：1996-07-05
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO
IPC分类号： B23C5/06
摘要： PROBLEM TO BE SOLVED: To efficiently perform cutting to an object to be cut and finish a cut worked surface to be flat by setting a rake angle in the cross direction and a rake angle in the radial direction in a specified range. SOLUTION: As a throw-away chip 10 to be used is so constructed that a second flank 11b, the clearance angle of which is larger than that of a first flank 11a is provided to be connected to the rectangular first flank 11a in a main cutting edge 11. In the case of fitting a throw-away chip 10 to a cutter 1, plural throwaway chips 10 are fitted at required spaces on the outer peripheral part of the tip of the cutter 1 in the circumferential direction in such a manner that the corner angle by the main cutting blade 11 is ±3 deg., the radial rake angle γr is i±5 deg., and the axial rake angle γa is 25' deg.+5 deg..

8. 发明专利

JPH08336717A THROWAWAY TYPE ROLLING CUTTER 失效
公开(公告)号：JPH08336717A
公开(公告)日：1996-12-24
申请号：JP20289096
申请日：1996-07-11
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO , NAKASAKI MUNENORI
IPC分类号： B23C5/10 , B23C5/20 , B23C5/26
摘要： PURPOSE: To perform efficient cutting by attaching a cutting edge so as to have a large twist angel against the axis of a shank and to stably perform highly precise cutting for a long time in a throwaway type rolling cutting tool having a plurality of throwaway chips attached to the body part of the shank in the axial direction with specified intervals. CONSTITUTION: In a throwaway type rolling cutting tool having a cutting edge 16 inclined against the axis of a shank 2 and a plurality of throwaway chips 1 attached to the body part 21 of the shank via required intervals, the cutting edge in the throwaway chip is placed against the axis 0 of the shank so as to have a twist angle θ1 of 35 deg. to 50 deg. in the rotational direction rear side of the shank and then the throwaway chips are attached.

9. 发明专利

JPH08300213A THROWAWAY CHIP FOR CUTTING CORNER 失效
公开(公告)号：JPH08300213A
公开(公告)日：1996-11-19
申请号：JP13274095
申请日：1995-05-01
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO
IPC分类号： B23C5/20
摘要： PURPOSE: To provide a corner cutting throwaway chip capable of cutting stably for a long period without causing damage like a break in the lower end portion of the outer peripheral side when the chip is mounted to a corner cutting cutter for machining of metals. CONSTITUTION: In a corner cutting throwaway chip square in a plan and having four sides provided with cutting edges so that respective side wall contacting the respective cutting edge is formed with a flank, clearance angles θ in the respective relief surface 12 is increased respectively from one end side of cutting edge toward the other end side so that the flank 12 having the large clearance angle θ and the flank 12 having the small clearance angle θ are adjacent to each other in the intersecting portion of the cutting edges.

10. 发明专利

JPH03256607A THROWAWAY TIP FOR ROLLING CUTTING TOOL 失效
公开(公告)号：JPH03256607A
公开(公告)日：1991-11-15
申请号：JP5581890
申请日：1990-03-06
申请人： DIJET IND CO LTD
发明人： FUJIMOTO KATSUHIRO , NAKASAKI MUNENORI
IPC分类号： B23C5/10 , B23C5/20 , B23C5/22
摘要： PURPOSE:To realize a rolling cutting tool which cuts a high precision cut surface high efficiently and the service life of which is prolonged by providing one upper face with a cutting edge cosisting of a circular flank and a rake and having a negative inclination to the upper face. CONSTITUTION:A front view is in a triangular shape, and one side has a positively or negatively angled rake 14 and the upper face 11 has an inclination thetaand provided with a flank 15 in a circular arc R. A ridge formed by the rake 14 and the flank 15 is a cutting edge 16, and a bolt hole 17 to insert a fastening bolt therein is provided at the center of a tip and fixed to a shank. When the tip 1 is fixed on a tip seat 22, the seat 22 and seat walls 22a, 22b or the side walls 13a, 13b of the tip 1 are formed so that the ridge of the cutting edge 16 forms a torsional angle theta1 to the axial line 0 of the shank toward the rolling rear side of the tool, and the seat 22 and the seat walles 22a, 22b are all formed at a desired angle to a radial or axial direction of the shank to meet various cutting conditions. It is thus possible for the tip cutting edge to form a large torsional angle in an axial direction of the shank.

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