Patent US5215415A successfully refreshed from Google Patents.
US5215415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert
Assignee: Mitsubishi Materials Corp
•
Filing: 1991-02-27
•
Granted: 1993-06-01
•
Expires: 2011-02-27
Abstract
Abstract In a cutting insert, a base plate is formed into a polygonal configuration having a plurality of corners. At least one cutting-edge element is mounted on an upper surface of the corner of the base plate. The cutting-edge element is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other. The cutting-edge element is brazed to the upper surface of the corner of the base plate under such a condition that the super-hard sintered section is exposed to an upper surface of the base plate. The super-hard sintered section has its upper surface which is formed therein with a chip breaker having a surface roughness within a range of from 0.5S to 10S. Furthermore, in a polygonal cutting insert having a plurality of corners which have formed therein respective chip breakers, at least one of the chip breakers is different in form from the remaining chip breakers.
Inventors
- 👤 Hitoshi Fukuoka
- 👤 Katsuhiko Sato
- 👤 Yuichi Kodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:33
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; B23B2240/00; B23B2240/08; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235; Y10T407/24; Y10T407/245; Y10T407/27
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
124 words
A cutting insert comprising a base plate formed into a polygonal form having a plurality of corners, and at least one cutting-edge element mounted on an upper surface of one of the corner of said base plate, wherein said cutting-edge element is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other, said cutting-edge element being brazed to the upper surface of the corner of said base plate under such a condition that said super-hard sintered section is exposed to an upper surface of said base plate, and wherein said super-hard sintered section has an upper surface which has formed therein a chip breaker whose surface roughness is within a range of from 0.5S to 10S.
Claim 2
Dependent Claim
124 words
A cutting insert comprising a base plate formed into a polygonal form having a plurality of corners, and at least one cutting-edge element mounted on an upper surface of one of the corner of said base plate, wherein said cutting-edge element is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other, said cutting-edge element being brazed to the upper surface of the corner of said base plate under such a condition that said super-hard sintered section is exposed to an upper surface of said base plate, and wherein said super-hard sintered section has an upper surface which has formed therein a chip breaker whose surface roughness is within a range of from 0.5S to 10S.
Claim 3
Dependent Claim
61 words
A cutting insert according to claim 1, wherein said cutting-edge element has a cutting edge, and wherein said chip breaker has two portions, said portion nearest said cutting edge having a surface roughness of at most 0.8S over 5% to 50% of the width of said chip breaker and the remaining portion having a surface roughness of from 0.5S to 10S.
Claim 4
Dependent Claim
28 words
A cutting insert according to claim 1, wherein said chip breaker has a width of 1.0 mm to 3.0 mm at the forward end of the cutting edge.
Claim 5
Dependent Claim
57 words
A cutting insert according to claim 1, wherein said high-hardness sintered section is made of cemented carbide having as the main component a component selected from the group consisting of tungsten carbide and cermet, while said super-hard sintered section has as the main component a component selected from the group consisting of diamond and cubic-system boron nitride.
Claim 6
Dependent Claim
31 words
A cutting insert according to claim 2, wherein said portion of said chip breaker nearest said cutting edge serves as a polished portion having a surface roughness of at most 0.8S.
Claim 7
Dependent Claim
27 words
A cutting insert according to claim 5, wherein said remaining portion of said chip breaker has a surface roughness within a range of from 1.5S to 2.0S.
Claim 8
Dependent Claim
16 words
A cutting insert according to claim 1, wherein said chip breaker has a positive rake angle.
Claim 9
Dependent Claim
45 words
A cutting insert according to claim 1, wherein said cutting-edge element has a cutting edge, and wherein said chip breaker has a leading edge serving as said cutting edge of said cutting-edge element, and a trailing edge extending in oblique relation to said leading edge.
Claim 10
Dependent Claim
22 words
A cutting insert according to claim 1, wherein said chip breaker is formed only in the upper surface of said cutting-edge element.
Claim 11
Dependent Claim
82 words
A cutting insert according to claim 1, wherein said one corner of said base plate is formed therein with a cut-out, said upper surface of the corner of said base plate serving as a bottom surface of said cut-out, and wherein said high-hardness sintered section and said super-hard sintered section are superimposed one upon the other in a direction parallel to the bottom surface of said cut-out such that said super-hard sintered section is located at a periphery of said base plate.
Claim 12
Dependent Claim
32 words
A cutting insert according to claim 1, wherein said chip breaker has an upper surface which extends substantially in parallel relation to the upper surface of the corner of said base plate.
Claim 13
Dependent Claim
45 words
A cutting insert according to claim 1, wherein said cutting-edge element has a cutting edge, and wherein said chip breaker has a leading edge serving as said cutting edge of said cutting-edge element, and a trailing edge extending in parallel relation to said leading edge.
Claim 14
Dependent Claim
37 words
A cutting insert according to claim 1, wherein said chip breaker has a first section formed in the upper surface of said cutting-edge element and a second section formed in the upper surface of said base plate.
Claim 15
Dependent Claim
66 words
A cutting insert according to claim 1, wherein the corner of said base plate is formed therein with a cut-out, said upper surface of the corner of said base plate serving as a bottom surface of said cut-out, and wherein said high-hardness sintered section and said super-hard sintered section are superimposed one upon the other in a direction perpendicular to the bottom surface of said cut-out.
Claim 16
Dependent Claim
26 words
A cutting insert according to claim 1, comprising a plurality of cutting-edge elements mounted respectively on upper surfaces of the respective corners of said base plate.
Claim 17
Dependent Claim
98 words
A cutting insert according to claim 15, wherein said corners of said base plate are formed therein with their respective cut-outs, said upper surfaces of the respective corners of said base plate serving respectively as bottom surfaces of the respective corners of said base plate, and wherein the high-hardness sintered section and the super-hard sintered section of each of said cutting-edge elements are superimposed one upon the other in a direction parallel to the bottom surface of a corresponding one of said cut-outs such that the super-hard sintered section is located at a periphery of said base plate.
Claim 18
Dependent Claim
111 words
A cutting insert according to claim 15, wherein said cutting-edge elements have their respective cutting edges, wherein the upper surfaces of the respective super-hard sintered sections are formed therein with respective chip breakers, wherein a first one of the chip breakers has a first leading edge serving as the cutting edge of a corresponding one of said cutting-edge elements, and a trailing edge extending in parallel relation to the first leading edge, and a second one of the chip breakers has a second leading edge serving as the cutting edge of a corresponding one of said cutting-edge elements, and a trailing edge extending in oblique relation to said second leading edge.
Claim 19
Dependent Claim
37 words
A cutting insert according to claim 15, wherein each of said cutting-edge elements is formed generally into a rectangular configuration as viewed in plan, and is formed generally into a triangular configuration as viewed in side elevation.
Claim 20
Dependent Claim
37 words
A cutting insert according to claim 18, wherein said cutting edge elements have respective cutting edges, each of said cutting-edge elements having opposed long sides one of which extends along a corresponding one of said cutting edges.
Claim 21
Dependent Claim
16 words
A cutting insert according to claim 1, wherein said base plate is triangular in plan view.
Claim 22
Dependent Claim
16 words
A cutting insert according to claim 1, wherein said base plate is rectangular in plan view.
Claim 23
Dependent Claim
22 words
A cutting insert according to claim 21, wherein the super-hard sintered section is exposed to the upper surface of said base plate.
Claim 24
Dependent Claim
16 words
A cutting insert according to claim 1, wherein said base plate is square in plan view.
Claim 25
Dependent Claim
16 words
A cutting insert according to claim 1, wherein said base plate is rhomboid in plan view.
Claim 26
Dependent Claim
79 words
A cutting insert according to claim 24, wherein said rhomboid base plate has four sides, and wherein a pair of opposing sides of said four sides of said rhomboid base plate have respective angles of 55°, and wherein a pair of cutting-edge elements are brazed respectively to said pair of opposed sides of said rhomboid base plate such that the super-hard sintered section of each of said cutting-edge elements is exposed to said upper surface of said base plate.
Claim 27
Dependent Claim
77 words
A cutting insert according to claim 24, wherein said rhomboid base plate has four sides, and wherein a pair of opposing sides of said four sides of said rhomboid base plate have respective angles of 35°, and wherein a pair of cutting-edge elements are brazed to said pair of opposed sides of said rhomboid base plate such that the super-hard sintered section of each of said cutting-edge elements is exposed to said upper surface of said plate.
Claim 28
Dependent Claim
153 words
A cutting insert comprising a base plate formed into a polygonal shape having a plurality of corners, and a plurality of cutting-edge elements mounted respectively on upper surfaces of the respective corners of said base plate, wherein each of said cutting-edge elements is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other, the cutting-edge element being brazed to the upper surface of a corresponding one of the corners of said base plate under such a condition that the super-hard sintered section is exposed to an upper surface of said base plate, wherein the super-hard sintered section of each of said cutting-edge elements has an upper surface which is formed with a chip breaker, whose surface roughness is within a range of from 0.5 S to 10 S, and wherein at least one of said chip breakers differs in shape from the remaining chip breakers.
Claim 29
Dependent Claim
153 words
A cutting insert comprising a base plate formed into a polygonal shape having a plurality of corners, and a plurality of cutting-edge elements mounted respectively on upper surfaces of the respective corners of said base plate, wherein each of said cutting-edge elements is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other, the cutting-edge element being brazed to the upper surface of a corresponding one of the corners of said base plate under such a condition that the super-hard sintered section is exposed to an upper surface of said base plate, wherein the super-hard sintered section of each of said cutting-edge elements has an upper surface which is formed with a chip breaker, whose surface roughness is within a range of from 0.5 S to 10 S, and wherein at least one of said chip breakers differs in shape from the remaining chip breakers.
Claim 30
Dependent Claim
65 words
A cutting insert according to claim 27, wherein said cutting-edge elements have their respective cutting edges, and wherein said chip breaker has two portions, said portion nearest said cutting edge having a surface roughness of at most 0.8 S over 5% to 50% of the width of said chip breaker and the remaining portion having a surface roughness of from 0.5 S to 10 S.
Claim 31
Dependent Claim
30 words
A cutting insert according to claim 27, wherein each of said chip breakers has a width of 1.0 mm to 3.0 mm at the forward end of the cutting edge.
Claim 32
Dependent Claim
54 words
A cutting insert according to claim 27, wherein the high-hardness sintered section of each of said cutting-edge elements is made of cemented carbide whose main component is one of tungsten carbide and cement, while the super-hard sintered section of the cutting-edge element has as its main component one of diamond and cubic-system boron nitride.
Claim 33
Dependent Claim
29 words
A cutting insert according to claim 28, wherein the portion of each of said chip breakers serves as a polished portion whose surface roughness is at most 0.8 S.
Claim 34
Dependent Claim
29 words
A cutting insert according to claim 31, wherein the remaining portion of the chip breaker has a surface roughness within a range of from 1.5 S to 2.0 S.
Claim 35
Dependent Claim
18 words
A cutting insert according to claim 27, wherein each of said chip breakers has a positive rake angle.
Claim 36
Dependent Claim
38 words
A cutting insert according to claim 27, wherein each of said chip breakers has an upper surface which extends substantially in parallel relation to the upper surface of a corresponding one of the corners of said base plate.
Claim 37
Dependent Claim
52 words
A cutting insert according to claim 27, wherein said cutting-edge elements have their respective cutting edges, and wherein each of said chip breakers has a leading edge serving as the cutting edge of a corresponding one of said cutting-edge elements, and a trailing edge extending in parallel relation to said leading edge.
Claim 38
Dependent Claim
51 words
A cutting insert according to claim 27, wherein said cutting-edge elements have respective cutting edges, and wherein each of said chip breakers has a leading edge serving as the cutting edge of a corresponding one of said cutting-edge elements, and a trailing edge extending in oblique relation to said leading edge.
Claim 39
Dependent Claim
28 words
A cutting insert according to claim 27, wherein each of said chip breakers is formed only in the upper surface of a corresponding one of said cutting-edge elements.
Claim 40
Dependent Claim
43 words
A cutting insert according to claim 27, wherein each of said chip breakers has a first section formed in the upper surface of a corresponding one of said cutting-edge elements and a second section formed in the upper surface of said base plate.
Claim 41
Dependent Claim
85 words
A cutting insert according to claim 27, wherein the corners of said base plate are formed therein with their respective cut-outs, the upper surface of a corresponding one of the corners of said base plate serving as a bottom surface of a corresponding one of said cut-outs, and wherein the high-hardness sintered section and the super-hard sintered section of each of said cutting-edge elements are superimposed one upon the other in a direction perpendicular to the bottom surface of a corresponding one of said cut-outs.
Claim 42
Dependent Claim
100 words
A cutting insert according to claim 27, wherein the corners of said base plate are formed therein with their respective cut-outs, the upper surface of a corresponding one of the corners of said base plate serving as a bottom surface of a corresponding one of said cut-outs, and wherein the high-hardness sintered section and the super-hard sintered section of each of said cutting-edge elements are superimposed one upon the other in a direction parallel to the bottom surface of a corresponding one of said cut-outs such that the super-hard sintered section is located at a periphery of said base plate.
Claim 43
Dependent Claim
95 words
A cutting insert according to claim 27, wherein said cutting-edge elements have their respective cutting edges, wherein a first one of said chip breakers has a first leading edge serving as the cutting edge of a corresponding one of said cutting-edge elements, and a trailing edge extending in parallel relation to the first leading edge, and a second one of said chip breakers has a second leading edge serving as the cutting edge of a corresponding one of said cutting edge elements, and a trailing edge extending in oblique relation to said second leading edge.
Claim 44
Dependent Claim
37 words
A cutting insert according to claim 27, wherein each of said cutting-edge elements if formed generally into a rectangular configuration as viewed in plan, and is formed generally into a triangular configuration as viewed in side elevation.
Claim 45
Dependent Claim
39 words
A cutting insert according to claim 42, wherein said cutting edge elements have their respective cutting edges, wherein each of said cutting-edge elements has opposed long sides, one of which extends along a corresponding one of said cutting edges.
Claim 46
Dependent Claim
16 words
A cutting insert according to claim 27, wherein said base plate is triangular in plan view.
Claim 47
Dependent Claim
16 words
A cutting insert according to claim 27, wherein said base plate is rectangular in plan view.
Claim 48
Dependent Claim
28 words
A cutting insert according to claim 27, wherein the super-hard sintered section of each of said cutting-edge elements is exposed to the super surface of said base plate.
Claim 49
Dependent Claim
16 words
A cutting insert according to claim 27, wherein said base plate is square in plan view.
Claim 50
Dependent Claim
16 words
A cutting insert according to claim 27, wherein said base plate is rhomboid in plan view.
Claim 51
Dependent Claim
80 words
A cutting insert according to claim 48, wherein said rhomboid base plate has four sides, and wherein a pair of opposed ones of said four sides of said rhomboid base plate have respective angles of 551 k, and wherein a pair of cutting-edge elements are brazed respectively to said pair of opposed sides of said rhomboid based plate such that the super-hard sintered section of each of said cutting-edge elements is exposed to said upper surface of said base plate.
Claim 52
Dependent Claim
79 words
A cutting insert according to claim 48, wherein said rhomboid base plate has four sides, and wherein a pair of opposed ones of said four sides of said rhomboid base plate have respective angles of 351 k, and wherein a pair of cutting-edge elements are brazed to said pair of opposed sides of said rhomboid base plate such that the super-hard sintered section of each of said cutting-edge elements is exposed to said upper surface of said base plate.
References Cited (Backward Citations)
US2053977A
Cited
US2309371A
Cited
DE2231631A1
Cited
US3792514A
Cited
US3781956A
Cited
FR2271894A1
Cited
SU607659A1
Cited
JPS5473390A
Cited
GB2037629A
Cited
GB2086430A
Cited
US4437800A
Cited
US4959929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |