CA1233630A - Cutting insert with clip control - Google Patents
Cutting insert with clip controlInfo
- Publication number
- CA1233630A CA1233630A CA000461980A CA461980A CA1233630A CA 1233630 A CA1233630 A CA 1233630A CA 000461980 A CA000461980 A CA 000461980A CA 461980 A CA461980 A CA 461980A CA 1233630 A CA1233630 A CA 1233630A
- Authority
- CA
- Canada
- Prior art keywords
- cutting
- corner
- insert
- chip engaging
- polygon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims 1
- 241000282320 Panthera leo Species 0.000 description 4
- 238000003754 machining Methods 0.000 description 2
- 108700028369 Alleles Proteins 0.000 description 1
- 241000510672 Cuminum Species 0.000 description 1
- 235000007129 Cuminum cyminum Nutrition 0.000 description 1
- 241001673526 Lydia Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- HVCNNTAUBZIYCG-UHFFFAOYSA-N ethyl 2-[4-[(6-chloro-1,3-benzothiazol-2-yl)oxy]phenoxy]propanoate Chemical compound C1=CC(OC(C)C(=O)OCC)=CC=C1OC1=NC2=CC=C(Cl)C=C2S1 HVCNNTAUBZIYCG-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
- B23B27/143—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having chip-breakers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Drilling Tools (AREA)
- Milling Processes (AREA)
Abstract
ABSTRACT
A cutting tool for improved material removal efficiency over a relatively wide mid range of typically used feed rates is disclosed. In a preferred form of an indexable polygonal cutting insert, a first cylindrical chip control groove of uniform width extends from a cutting edge at each side of the polygon and terminates inwardly from the edge in a second cylindrical chip control groove having a cross section of larger radius but of lesser depth than that of the first chip control groove. The second groove has its largest width at a point substantially midway between adjacent cutting corners of the polygon and diminishes to zero width at each corner of the polygon leaving a web of insert material running along the bisector of each corner angle, thereby providing adequate insert body support for enabling use of the disclosed chip control geometry on both sides of the insert. The cutting edge along each side of the polygon is arcuate with its lowest point relative to a major face of the insert being substantially at a mid point between each corner of the polygon.
A cutting tool for improved material removal efficiency over a relatively wide mid range of typically used feed rates is disclosed. In a preferred form of an indexable polygonal cutting insert, a first cylindrical chip control groove of uniform width extends from a cutting edge at each side of the polygon and terminates inwardly from the edge in a second cylindrical chip control groove having a cross section of larger radius but of lesser depth than that of the first chip control groove. The second groove has its largest width at a point substantially midway between adjacent cutting corners of the polygon and diminishes to zero width at each corner of the polygon leaving a web of insert material running along the bisector of each corner angle, thereby providing adequate insert body support for enabling use of the disclosed chip control geometry on both sides of the insert. The cutting edge along each side of the polygon is arcuate with its lowest point relative to a major face of the insert being substantially at a mid point between each corner of the polygon.
Description
~3~630 CUTTING INSERT WITH CHIP CONTROL
Background of the Invention Field of the Invention The invention relates generally to cutting tools for machining chip forming materials. More particularly, the invention concerns cutting inserts incorporating chip control geometry particularly advantageous over a mid-range of feed rates running between very low or finishing feed rates and relatively high feed rates.
Description of the Prior Art U.S. Patent No. 4,465,412 to Weekly, issued August 14, 1984, teaches chip control geometry for a cutting insert particularly useful for finish cuts at relatively low feed rates. Canadian Patent Application Serial No. 437,862, filed September 28, 1983, discloses chip control geometry particularly useful at relatively high feed rates. While both these prior art concepts have been successful for their intended operating condition, I have discovered an improved chip control arrangement suitable for use over a relatively wide mid-range of feed rates, enabling use of cutting inserts of this invention in many applications previously requiring a switch from one design to another as one progresses over the encountered range of feed rates for such applications.
Examples of prior art disclosing multiple chip control grooves superficially resembling portions of the instant disclosure are:
U.S. Patent 3,213,716 - Gets U.S. Patent 3,381,349 - Newcomer U.S. Patent 3,395,434 - Wirfelt U.S. Patent 3,399,442 - Jones et at.
U.S. Patent 3,733,664 - McKelvey 1~3;3~
P_21 U.S. Patent 3,968,550- Jury lJ.S. Pa ,0~;6,~7~- S~iclel U.S. Patent 4~288,179 - Kruger et at.
U.S. Patent ~,367,990 Port et at.
SUMMARY OF TAO INVENllON
Tile invelltiorl is emboclis~cl in a preferred form as a LuJly index able polygonal cutting insert for machining chip forming materials, the insert incorporating on both chip engaging surfaces thereof improved chip control including a first cylindrical chip control grove of uniforln width intersecting and I in parallel to an ark cutting edge at each side of tile polygon. A second chip control groove adjoins each first control groove and has a cross-section ofJargon radius but of less depth if aft the first clip control groove relative to the plane of the face of the insert. The second control groove has its largest widthsubstantially mid-way between adjacent cutting corners of the polygon and gradually decreases to zero width near each corner in the area of the bisector ox each cutting corner angle. Each arcuate cutting edge along the sides of the polygon has its lowest point relative to its associated insert chip engagillg face substantially at the midpoint between adjacent cutting corners. Thus, each cutting edge presents a positive front to bed< Rowley angle, but can be mounted in a negative rake tool holder. Toe resultant island area let t in the chip enraging face Inwardly of the second control groove provides adequate mounting support for inserts incorporating chip control grooves in both major polygonal faces i.e.
double-sided, fully index able inserts.
IFFY DI~SCI?IPTION OF THY DRAWING
The objects and features of the invention will become apparent from a reading of a detailed description of a preferred embodiment, taken in conjunction with the drawing, in which:
Fig. 1 depicts a top plan view of an insert designed in accordance with the principles of the invention;
x~3 Fig. 2 is a side plan view of the insert of Fig. 1;
. 3 is a cross suckle tow token from line 111-lll of lug. 1; end Fig. 4 is cross sectional view taken from line IV-IV of Fig. 1.
DETAILLV DISCRETION
With reference to Figs. 1-4, triangular index able cutting insert 100 b.15 Ipl~er Lydia Vowel- SllbSt;lilti.llly parallel loupe Cng;l~in~ or rake [aces, upper face 106 being bounded by arcuate cutting edges AYE extending between cutting corners A and B, 108~ extending between cutting corners B and C, and 108C
e~tenclillg Litton quietly, corners C and A. As seen in Fig. 2, each arcuate cumin Dow, such as AYE, has its lowest point relative to its associated chip engaging face substantially midway between its associated cutting corners A and 13- In thy vicirIity of corners A and En, edge AYE extends for a relatively short distance 114 substantially parallel to but slightly lower than the plane of top chip I cnga~illg face 106 end tell smoothly blends into a relatively large circular arc having radius lo The side form of cutting edges AYE, B, C, as shown in Fig. 2 for edge AYE, creates a positive front to back rake angle. Side or flank faces 113 of insert 100 are substantially perpendicular to the top and bottom chip engaging faces. Hence, in preferred form, insert 100 is a so-called "positive-negative" insert - i.e. having cutting edges with positive front to bed< Rowley on a negative style insert body mountable in a negative Rowley style tool holder pocket.
Intersecting each arcuate edge and extending parallel thereto are first cylindrical chip control grooves Lola, lob and Luke, each having uniform width 120. Grooves Lola and lO9PJ smoothly merge at corner 13, grooves lob and Luke smoothly merge at corner C, and grooves Luke and Lola smoothly merge at corner A.
adjacent each first groove IOTA, B, C are second cylindrical 3Q control grooves Lola, B, C. Second groove Lola intersects groove Lola along substantially straight line boundary OWE with its innermost boundary being arcuate such that groove 11 lo has its widest point 11~ substantially midway '1~23~Q
between cutting corners A and B. Similarly, cylindrical groove 11113 intersects grove 10~l~ along subs till so igloo e bounclaly Ill end his Jo widest point substantially midway between CUttillg corners B and C, while cylindrical groove 11 lo in tersects groove 1 09C along sub Stan tidally straight line boundary 110C end has its wakeless pullout substantially midway between cutting corners C and A.
Unlike control grooves 109/\, 13, C, control grooves IIIA, 13, C do not merge into one another, but retooler each vanish to zero width in the area of the bisector of the angle defined by each cutting corner A, B, C.
Ilk inrlerlIlost Arctic boundaries of control grooves Lola, 13, end C define an island having surface lû6 tying substantially in the plane of the top chip engaging surface ox the insert. Island surface 106 has progressively narrowing projections AYE terminating at point AYE located substantially on the bisector owe the angle formed by corner A, 106L~ terminating at point 1121~ located substantially on the bisector ox the angle formed by corner B, and 106C
terminating at point 112C located substantially on the bisector of the angle formed by corner C. It is to be understood that, in a preferred form, -the chip control structure being herein described it prided on both major chip engaging faces of insert 100. With island 106 and associated projections AYE, B and C, anadequate mounting support surface is provided at each major face, thereby furnishing a double sided fully index able triangular insert with six index ablecutting edges. In general, polygonal inserts of the invent lion will leave on index able cutting edges, where n is the number of sides of the polygonal shape used.
Centrally located on the center of the insert loots inscribed circle TO '' is a cylindrical thlough-hole 102 with countersunk< portions Lola and 10413 for receipt of a suitably shaped insert mounting screw of a tool holder. ernatively, insert 100 could be of solid form for use in top clamp style tool holders.
Lo As seen from Fig. 3, each second groove such as groove lllB has a larger closs-secliollal I is R2 thin the cross-sectional radius RI sue its neighboring first groove. The depth below surface 106, Ho of groove lllB is lessthan the depth Hi for groove 109B. The axes of the cylindrical surfaces 109B and5 lllB are respectively Shelley at Of end C2 end are seen to lie inside of cutting edge 108B and run substantially parallel to a vertical plane containing the cutting edgy.
Axis C2 lies closer to the center point of the insert's inscribed circle than axis I as seen from Fig. 4, C2 is located at distance Do from the 10 plane of cutting edge AYE while Of is located a distance Do therefrom. It will also be apparellt that Do is greater than lo With the chip control structure above described, prototype inserts have been successfully operated in metal cutting applications over a feed rate range from about .005 inches/revolution to about .030 inches/revolution. At the Joker portion of this feed rate range, the firs-t or outer control groove operates as a chip directing surface, while its associated inner or second control groove serves principally as a relief clearance area thereby enabling relatively smooth uninhibited chip flow with decreased frictional resistance. Toward the higher end of the useful feed rate range, the second or inner control groove also functions as a chip directing surface.
One example of a specific prototype triangular insert successfully tested has an scribed circle with nominal diameter IT of 0.5 inches, an insert thickness between top and bottom island surfaces of 0.187 inches and a cutting edge radius Arc of 2.0 inches. leach cutting corner A, B, C is founded off with a nominal radius of 0.031 inches. The nominal uniform width 120 of each first or outer control groove is 0.042 inches, while each inner or second groove has a maximum width 115 at its mid point of 0.073 inches. I. typical value for dimension 114 of Fig. 2 at each cutting corker is û.100 inches, while typical values of 0.031 inches for dimension Hi (lug. 3), 0.025 inches for Ho (Fig. 3), 0.06 inches Lowe Ply for Al (Figs. 3 and 4), 0.155 inches for R2 (Figs. 3 and 4), 0.015 inches for Do (Fig.
I net 0.03 inches or Do (l it ) whelk successfully used.
It should be no ted the t the invent lion described herein has been 5 illustrated with reference to a particular embodiment. It is to be understood that many details used to facilitate description of such a particular embodiment havebell closely Hot convcl~ience only allele without lhnitalior~ off tube scope ox the invent lion, which is intended to be measured by the scope and spirit of the appended claims.
Background of the Invention Field of the Invention The invention relates generally to cutting tools for machining chip forming materials. More particularly, the invention concerns cutting inserts incorporating chip control geometry particularly advantageous over a mid-range of feed rates running between very low or finishing feed rates and relatively high feed rates.
Description of the Prior Art U.S. Patent No. 4,465,412 to Weekly, issued August 14, 1984, teaches chip control geometry for a cutting insert particularly useful for finish cuts at relatively low feed rates. Canadian Patent Application Serial No. 437,862, filed September 28, 1983, discloses chip control geometry particularly useful at relatively high feed rates. While both these prior art concepts have been successful for their intended operating condition, I have discovered an improved chip control arrangement suitable for use over a relatively wide mid-range of feed rates, enabling use of cutting inserts of this invention in many applications previously requiring a switch from one design to another as one progresses over the encountered range of feed rates for such applications.
Examples of prior art disclosing multiple chip control grooves superficially resembling portions of the instant disclosure are:
U.S. Patent 3,213,716 - Gets U.S. Patent 3,381,349 - Newcomer U.S. Patent 3,395,434 - Wirfelt U.S. Patent 3,399,442 - Jones et at.
U.S. Patent 3,733,664 - McKelvey 1~3;3~
P_21 U.S. Patent 3,968,550- Jury lJ.S. Pa ,0~;6,~7~- S~iclel U.S. Patent 4~288,179 - Kruger et at.
U.S. Patent ~,367,990 Port et at.
SUMMARY OF TAO INVENllON
Tile invelltiorl is emboclis~cl in a preferred form as a LuJly index able polygonal cutting insert for machining chip forming materials, the insert incorporating on both chip engaging surfaces thereof improved chip control including a first cylindrical chip control grove of uniforln width intersecting and I in parallel to an ark cutting edge at each side of tile polygon. A second chip control groove adjoins each first control groove and has a cross-section ofJargon radius but of less depth if aft the first clip control groove relative to the plane of the face of the insert. The second control groove has its largest widthsubstantially mid-way between adjacent cutting corners of the polygon and gradually decreases to zero width near each corner in the area of the bisector ox each cutting corner angle. Each arcuate cutting edge along the sides of the polygon has its lowest point relative to its associated insert chip engagillg face substantially at the midpoint between adjacent cutting corners. Thus, each cutting edge presents a positive front to bed< Rowley angle, but can be mounted in a negative rake tool holder. Toe resultant island area let t in the chip enraging face Inwardly of the second control groove provides adequate mounting support for inserts incorporating chip control grooves in both major polygonal faces i.e.
double-sided, fully index able inserts.
IFFY DI~SCI?IPTION OF THY DRAWING
The objects and features of the invention will become apparent from a reading of a detailed description of a preferred embodiment, taken in conjunction with the drawing, in which:
Fig. 1 depicts a top plan view of an insert designed in accordance with the principles of the invention;
x~3 Fig. 2 is a side plan view of the insert of Fig. 1;
. 3 is a cross suckle tow token from line 111-lll of lug. 1; end Fig. 4 is cross sectional view taken from line IV-IV of Fig. 1.
DETAILLV DISCRETION
With reference to Figs. 1-4, triangular index able cutting insert 100 b.15 Ipl~er Lydia Vowel- SllbSt;lilti.llly parallel loupe Cng;l~in~ or rake [aces, upper face 106 being bounded by arcuate cutting edges AYE extending between cutting corners A and B, 108~ extending between cutting corners B and C, and 108C
e~tenclillg Litton quietly, corners C and A. As seen in Fig. 2, each arcuate cumin Dow, such as AYE, has its lowest point relative to its associated chip engaging face substantially midway between its associated cutting corners A and 13- In thy vicirIity of corners A and En, edge AYE extends for a relatively short distance 114 substantially parallel to but slightly lower than the plane of top chip I cnga~illg face 106 end tell smoothly blends into a relatively large circular arc having radius lo The side form of cutting edges AYE, B, C, as shown in Fig. 2 for edge AYE, creates a positive front to back rake angle. Side or flank faces 113 of insert 100 are substantially perpendicular to the top and bottom chip engaging faces. Hence, in preferred form, insert 100 is a so-called "positive-negative" insert - i.e. having cutting edges with positive front to bed< Rowley on a negative style insert body mountable in a negative Rowley style tool holder pocket.
Intersecting each arcuate edge and extending parallel thereto are first cylindrical chip control grooves Lola, lob and Luke, each having uniform width 120. Grooves Lola and lO9PJ smoothly merge at corner 13, grooves lob and Luke smoothly merge at corner C, and grooves Luke and Lola smoothly merge at corner A.
adjacent each first groove IOTA, B, C are second cylindrical 3Q control grooves Lola, B, C. Second groove Lola intersects groove Lola along substantially straight line boundary OWE with its innermost boundary being arcuate such that groove 11 lo has its widest point 11~ substantially midway '1~23~Q
between cutting corners A and B. Similarly, cylindrical groove 11113 intersects grove 10~l~ along subs till so igloo e bounclaly Ill end his Jo widest point substantially midway between CUttillg corners B and C, while cylindrical groove 11 lo in tersects groove 1 09C along sub Stan tidally straight line boundary 110C end has its wakeless pullout substantially midway between cutting corners C and A.
Unlike control grooves 109/\, 13, C, control grooves IIIA, 13, C do not merge into one another, but retooler each vanish to zero width in the area of the bisector of the angle defined by each cutting corner A, B, C.
Ilk inrlerlIlost Arctic boundaries of control grooves Lola, 13, end C define an island having surface lû6 tying substantially in the plane of the top chip engaging surface ox the insert. Island surface 106 has progressively narrowing projections AYE terminating at point AYE located substantially on the bisector owe the angle formed by corner A, 106L~ terminating at point 1121~ located substantially on the bisector ox the angle formed by corner B, and 106C
terminating at point 112C located substantially on the bisector of the angle formed by corner C. It is to be understood that, in a preferred form, -the chip control structure being herein described it prided on both major chip engaging faces of insert 100. With island 106 and associated projections AYE, B and C, anadequate mounting support surface is provided at each major face, thereby furnishing a double sided fully index able triangular insert with six index ablecutting edges. In general, polygonal inserts of the invent lion will leave on index able cutting edges, where n is the number of sides of the polygonal shape used.
Centrally located on the center of the insert loots inscribed circle TO '' is a cylindrical thlough-hole 102 with countersunk< portions Lola and 10413 for receipt of a suitably shaped insert mounting screw of a tool holder. ernatively, insert 100 could be of solid form for use in top clamp style tool holders.
Lo As seen from Fig. 3, each second groove such as groove lllB has a larger closs-secliollal I is R2 thin the cross-sectional radius RI sue its neighboring first groove. The depth below surface 106, Ho of groove lllB is lessthan the depth Hi for groove 109B. The axes of the cylindrical surfaces 109B and5 lllB are respectively Shelley at Of end C2 end are seen to lie inside of cutting edge 108B and run substantially parallel to a vertical plane containing the cutting edgy.
Axis C2 lies closer to the center point of the insert's inscribed circle than axis I as seen from Fig. 4, C2 is located at distance Do from the 10 plane of cutting edge AYE while Of is located a distance Do therefrom. It will also be apparellt that Do is greater than lo With the chip control structure above described, prototype inserts have been successfully operated in metal cutting applications over a feed rate range from about .005 inches/revolution to about .030 inches/revolution. At the Joker portion of this feed rate range, the firs-t or outer control groove operates as a chip directing surface, while its associated inner or second control groove serves principally as a relief clearance area thereby enabling relatively smooth uninhibited chip flow with decreased frictional resistance. Toward the higher end of the useful feed rate range, the second or inner control groove also functions as a chip directing surface.
One example of a specific prototype triangular insert successfully tested has an scribed circle with nominal diameter IT of 0.5 inches, an insert thickness between top and bottom island surfaces of 0.187 inches and a cutting edge radius Arc of 2.0 inches. leach cutting corner A, B, C is founded off with a nominal radius of 0.031 inches. The nominal uniform width 120 of each first or outer control groove is 0.042 inches, while each inner or second groove has a maximum width 115 at its mid point of 0.073 inches. I. typical value for dimension 114 of Fig. 2 at each cutting corker is û.100 inches, while typical values of 0.031 inches for dimension Hi (lug. 3), 0.025 inches for Ho (Fig. 3), 0.06 inches Lowe Ply for Al (Figs. 3 and 4), 0.155 inches for R2 (Figs. 3 and 4), 0.015 inches for Do (Fig.
I net 0.03 inches or Do (l it ) whelk successfully used.
It should be no ted the t the invent lion described herein has been 5 illustrated with reference to a particular embodiment. It is to be understood that many details used to facilitate description of such a particular embodiment havebell closely Hot convcl~ience only allele without lhnitalior~ off tube scope ox the invent lion, which is intended to be measured by the scope and spirit of the appended claims.
Claims (4)
1. In a tool for cutting chip forming materials having a substantially planar polygonal chip engaging surface and a plurality of flank surfaces intersecting the chip engaging surface along each side of the polygon and at a cutting corner at each corner of the polygon, the improvement comprising:
an arcuate cutting edge extending between a pair of cutting corners having its lowest point relative a plane of the chip engaging surface substantially midway between the pair of cutting corners;
a first cylindrical control surface formed in the chip engaging surface and having a first cross sectional radius, substantially uniform width and extending to a first depth below the plane of the chip engaging surface, the first control surface intersecting the cutting edge and extending parallel thereto; and a second cylindrical control surface formed in the chip engaging surface adjacent to and merging at its outer boundary with the inner boundary of the first control surface, the second control surface having a second cross sectional radius larger than the first cross sectional radius, a second depth less than the first depth, and a width varying from a maximum at a point substantially midway between the pair of cutting corners to zero width in the area of the bisector of each corner angle.
an arcuate cutting edge extending between a pair of cutting corners having its lowest point relative a plane of the chip engaging surface substantially midway between the pair of cutting corners;
a first cylindrical control surface formed in the chip engaging surface and having a first cross sectional radius, substantially uniform width and extending to a first depth below the plane of the chip engaging surface, the first control surface intersecting the cutting edge and extending parallel thereto; and a second cylindrical control surface formed in the chip engaging surface adjacent to and merging at its outer boundary with the inner boundary of the first control surface, the second control surface having a second cross sectional radius larger than the first cross sectional radius, a second depth less than the first depth, and a width varying from a maximum at a point substantially midway between the pair of cutting corners to zero width in the area of the bisector of each corner angle.
2. The improvement of claim 1 further comprising a planar island surface lying in the plane of the chip engaging surface having progressively narrowing projections extending towards each cutting corner and terminating at each corner at an inner boundary of the first control surface, thereby defining a seating support surface for the tool.
3. An indexable cutting insert comprising a polygonal body having opposed parallel top and bottom planar chip engaging surfaces lying in substantially parallel planes and a polygonal peripheral surface formed by side surfaces substantially perpendicular to the parallel planes, pairs of the side surfaces intersecting at cutting corners of the polygon, wherein at least one of the top and bottom chip engaging surfaces includes:
arcuate cutting edges extending between adjacent pairs of cutting corners, each having its lowest point relative to its associated chip engaging surface substantially midway between the pair of cutting corners;
first cylindrical control surfaces formed in the chip engaging surface and having a first cross sectional radius, substantially uniform width and extending to a first depth below the chip engaging surface, the first control surfaces intersecting each cutting edge, extending parallel thereto, and merging with each other at each cutting corner; and a second cylindrical control surface formed in the chip engaging surface extending adjacent to and merging at its outer boundary with an inner boundary of each first control surface and having a second cross sectional radius larger than that of the first control surface cross sectional radius, a second depth less than that of the first control surface depth and a width varying from a maximum at a point substantially midway between the pair of cutting corners to zero width in the area of the bisector of each corner angle.
arcuate cutting edges extending between adjacent pairs of cutting corners, each having its lowest point relative to its associated chip engaging surface substantially midway between the pair of cutting corners;
first cylindrical control surfaces formed in the chip engaging surface and having a first cross sectional radius, substantially uniform width and extending to a first depth below the chip engaging surface, the first control surfaces intersecting each cutting edge, extending parallel thereto, and merging with each other at each cutting corner; and a second cylindrical control surface formed in the chip engaging surface extending adjacent to and merging at its outer boundary with an inner boundary of each first control surface and having a second cross sectional radius larger than that of the first control surface cross sectional radius, a second depth less than that of the first control surface depth and a width varying from a maximum at a point substantially midway between the pair of cutting corners to zero width in the area of the bisector of each corner angle.
4. The cutting insert of claim 3 further comprising a planar island surface bounded by the inner boundaries of the second control surfaces and located in the plane of the chip engaging surface, the island surface having progressively narrowing projections extending toward each cutting corner and terminating at each corner at inner boundaries of a pair of merging first control surfaces, thereby defining a seating support surface for the cutting insert.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52731883A | 1983-08-29 | 1983-08-29 | |
| US527,318 | 1983-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1233630A true CA1233630A (en) | 1988-03-08 |
Family
ID=24100993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000461980A Expired CA1233630A (en) | 1983-08-29 | 1984-08-28 | Cutting insert with clip control |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS60150902A (en) |
| AU (1) | AU574709B2 (en) |
| BE (1) | BE900444A (en) |
| BR (1) | BR8404287A (en) |
| CA (1) | CA1233630A (en) |
| DE (1) | DE3431601A1 (en) |
| FR (1) | FR2550977B1 (en) |
| IT (1) | IT1179232B (en) |
| MX (1) | MX160607A (en) |
| SE (1) | SE8404258L (en) |
| ZA (1) | ZA846753B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102026755A (en) * | 2008-05-23 | 2011-04-20 | 京瓷株式会社 | Drill, cutting insert, and method of producing cut object |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606679A (en) * | 1983-08-29 | 1986-08-19 | Gte Valeron Corporation | Cutting insert with chip control |
| JPH0426165Y2 (en) * | 1985-11-14 | 1992-06-24 | ||
| IL84171A (en) * | 1987-10-14 | 1990-09-17 | Iscar Ltd | Cutting insert and tool holder therefor |
| DE3819131A1 (en) * | 1988-06-06 | 1989-12-07 | Mapal Fab Praezision | CUTTING INSERT FOR THE FINISHING, IN PARTICULAR OF HOLES |
| DE3832547A1 (en) * | 1988-09-24 | 1990-04-05 | Mapal Fab Praezision | KNIFE PLATE FOR PRECISION MACHINING, IN PARTICULAR OF HOLES |
| US5324144A (en) * | 1992-09-21 | 1994-06-28 | Valenite Inc. | High sheer, ultra light duty insert |
| US5868531A (en) * | 1997-09-05 | 1999-02-09 | Tri Tool Inc. | Tool bit with undercut hook radius |
| DE19856931A1 (en) * | 1998-12-10 | 2000-06-15 | Widia Gmbh | Cutting insert for machining, with concave secondary clearance parallel to cutting edge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3213716A (en) * | 1962-10-01 | 1965-10-26 | Metal Cutting Tools Inc | Boring tool |
| US3381349A (en) * | 1966-04-25 | 1968-05-07 | Newcomer Prod Inc | Cutting tool |
| US3399442A (en) * | 1966-09-08 | 1968-09-03 | Kennametal Inc | Cutting insert |
| JPS5212303Y2 (en) * | 1971-02-26 | 1977-03-17 | ||
| GB1379912A (en) * | 1971-06-22 | 1975-01-08 | Wickman Wimet Ltd | Inserts for cutting tools |
| SE349759B (en) * | 1971-10-27 | 1972-10-09 | Sandvik Ab | |
| US3733664A (en) * | 1971-11-23 | 1973-05-22 | Kennametal Inc | Cutting insert |
| CH590099A5 (en) * | 1975-01-14 | 1977-07-29 | Stellram Sa | |
| US4159884A (en) * | 1977-07-05 | 1979-07-03 | Schott Lawrence A | Cutting tool |
| GB2004477B (en) * | 1977-08-05 | 1982-03-10 | Sumitomo Electric Industries | Throw away insert |
| DE2810824A1 (en) * | 1978-03-13 | 1979-03-29 | Krupp Gmbh | CUTTING INSERT |
| GB2035859B (en) * | 1978-11-17 | 1982-08-25 | Kennametal Inc | Cutting insert |
| US4268663A (en) * | 1979-04-10 | 1981-05-19 | Syva Company | Macromolecular glycosidase substrates |
| IL58006A (en) * | 1979-08-08 | 1983-02-23 | Iscar Ltd | Cutting insert with chip control means |
| US4340324A (en) * | 1980-08-28 | 1982-07-20 | Kennametal Inc. | Cutting insert |
| GB2116082A (en) * | 1982-02-26 | 1983-09-21 | Gen Electric | Inserts for cutting tools |
| US5056872A (en) * | 1988-01-19 | 1991-10-15 | Ni Industries, Inc. | Wheel trim |
-
1984
- 1984-08-28 BR BR8404287A patent/BR8404287A/en unknown
- 1984-08-28 FR FR8413306A patent/FR2550977B1/en not_active Expired
- 1984-08-28 MX MX202537A patent/MX160607A/en unknown
- 1984-08-28 CA CA000461980A patent/CA1233630A/en not_active Expired
- 1984-08-28 AU AU32472/84A patent/AU574709B2/en not_active Expired - Fee Related
- 1984-08-28 DE DE19843431601 patent/DE3431601A1/en active Granted
- 1984-08-28 SE SE8404258A patent/SE8404258L/en not_active Application Discontinuation
- 1984-08-28 IT IT48766/84A patent/IT1179232B/en active
- 1984-08-28 BE BE0/213549A patent/BE900444A/en not_active IP Right Cessation
- 1984-08-29 JP JP59180225A patent/JPS60150902A/en active Pending
- 1984-08-29 ZA ZA846753A patent/ZA846753B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102026755A (en) * | 2008-05-23 | 2011-04-20 | 京瓷株式会社 | Drill, cutting insert, and method of producing cut object |
| US8840346B2 (en) | 2008-05-23 | 2014-09-23 | Kyocera Corporation | Drill, cutting insert, and method of manufacturing cut product |
Also Published As
| Publication number | Publication date |
|---|---|
| MX160607A (en) | 1990-03-27 |
| AU574709B2 (en) | 1988-07-14 |
| SE8404258L (en) | 1985-03-01 |
| JPS60150902A (en) | 1985-08-08 |
| BE900444A (en) | 1984-12-17 |
| IT1179232B (en) | 1987-09-16 |
| IT8448766A0 (en) | 1984-08-28 |
| IT8448766A1 (en) | 1986-02-28 |
| BR8404287A (en) | 1985-07-23 |
| SE8404258D0 (en) | 1984-08-28 |
| FR2550977A1 (en) | 1985-03-01 |
| FR2550977B1 (en) | 1986-12-19 |
| AU3247284A (en) | 1985-03-07 |
| DE3431601C2 (en) | 1990-08-23 |
| ZA846753B (en) | 1985-04-24 |
| DE3431601A1 (en) | 1985-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |