GB2495200A - Rotary cutting tool with helical toothed flutes - Google Patents
Rotary cutting tool with helical toothed flutes Download PDFInfo
- Publication number
- GB2495200A GB2495200A GB1217029.6A GB201217029A GB2495200A GB 2495200 A GB2495200 A GB 2495200A GB 201217029 A GB201217029 A GB 201217029A GB 2495200 A GB2495200 A GB 2495200A
- Authority
- GB
- United Kingdom
- Prior art keywords
- text
- tool
- chip breaker
- teeth
- flutes
- 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.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 13
- 238000003754 machining Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical group [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 claims 2
- 229910001026 inconel Inorganic materials 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
- B23C2210/0407—Cutting angles
- B23C2210/0442—Cutting angles positive
- B23C2210/0457—Cutting angles positive radial rake angle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
- B23C2210/0485—Helix angles
- B23C2210/0492—Helix angles different
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/08—Side or top views of the cutting edge
- B23C2210/088—Cutting edges with a wave form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/48—Chip breakers
- B23C2210/486—Chip breaking grooves or depressions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2215/00—Details of workpieces
- B23C2215/04—Aircraft components
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The rotary cutting tool 1 is for the rough machining of difficult materials such as inconel (rtm). The tool is made of solid carbide with a plurality of helical toothed 10 flutes 6 of differential pitch defining alternating peaks 9 and troughs 8 and extending from an end 7 of the tool towards a shank 4 of the tool. Multiple teeth (11, Figure 3) on the end of the tool have a radial rake of 0° to 12°. A chip breaker facility (12, Figure 3) is provided on at least some of the end teeth. Each end tooth has a dish angle of 3° to 12°. The flutes may have the same helix angle or a different helix angle.
Description
Title of the Invention
Rotary cutting tool
Field of the Invention
ibis invention relates to a rotary cutting tool for the machining of difficult materials such as titanium and superafloys such as lnconeltM.
Background of the Invention
Rotary cutting tools for roughing operations in titanium etc are used extensively in the manufacturing of aircraft components such as engine parts and airframe elements, and have usually been produced in high speed steel, with multiple flutes, and with an end cutting face. To machine a solid component, such as a block of titanium, either a hole is firstly drilled i.e. the tool is plunged into the workpiece, into which the roughing tool may firstly be inserted axially and then be displaced laterally, or alternatively the tool is ramped into the black e.g. at a relatively shallow 0.5° angle, until the required depth is attained whereupon roughing operations can commence.
With prior art tools and roughing techniques for these difficult materials, tool life was a possible 100-200 minutes, with several hours and several tools typically being required per workpiece.
Object of the Invention A basic object of the present invention is the provision of an improved rotary cutting tool,
Summary of the Invention
According to the present invention there is provided a rotary cutting tool for the rough machining of difficult materials, the tool being of solid carbide with a plurality of helical toothed flutes of differential pitch defining alternating peaks and troughs and extending from an end of the tool towards a shank of the tool, with multiple teeth on the end of the tool having a radial rake of 0° to 12°, with a chip breaker facility provided on at least some of the end teeth, and with each end tooth having a dish angle of 3° to 12°.
Advantages of the Invention Tests have indicated that the above defined tool is capable of the rapid machining of titanium using a considerable steeper ramp angle -typically of 7° -than has previously been thought possible, thereby not only increasing the machining speed, and hence reducing machining time and attendant cost, but also with considerably enhanced tool life compared with prior art HSS tools of more or less industry-standard geometry.
Preferred or Optional Features The unequal divide of the flutes resulting from the differential pitch, is accompanied by a constant helix angle or alternatively a differential helix angle.
The carbide is tungsten carbide.
The radial rake angle is 8° or thereabouts.
The chip breaker facility is provided on all end teeth.
The chip breaker facility comprises at least one groove or notch.
A plurality of chip breaker grooves or notches are provided at spaced locations along some or all of the end teeth.
Two or three chip breaker grooves or notches are provided on each end tooth.
Different numbers of chip breaker grooves or notches are provided on different end teeth.
Each chip breaker groove or notch is of <1,5mm depth.
Each chip breaker groove or notch is 0.5 depth, or thereabouts.
Each chip breaker groove or notch is of 45° included angle, or thereabouts.
The dièh angle is 10°, or thereabouts.
The teeth of each flute are at 2.0mm pitch! or thereabouts.
The teeth of each flute are to 0.35mm depth, or thereabouts.
The flutes are provided with wavy tooth formations.
The tool is provided with a performance enhancing and/or friction reducing coating.
The coating is applied by PVD.
Brief Description of the Drawings
One example of rotary cutting tool in accordance with the invention is illustrated in Figure 1 of the accompanying drawings, being ramped at 70 into a solid workpiece; [W for roughing out material M e.g. in the form of a slot, in one side of the workpiece, whilst} Figure 2 is a side elevation of the tool of Figure 1; Figure 3 is an end elevation of the tool of Figure 1 and Figure 4 is an isometric view of the tool of Figure 1.
Detailed Description of the Drawings
An elongate rotary cutting tool 1, in the form of a roughing tool, is of solid carbide having a longitudinal axis 2 and an external periphery 3. The tool 1 also has at one end a shank 4 adapted to be clamped into a chuck or arbour (not shown) of a machine tool. A cutting head 5 is provided at the other end of the tool and is defined by six helical flutes S part way along the tool 1 extending from an end 7 of the tool 1. Each flute S defines alternating troughs 8 and ridges 9, and each ridge 9 carries a plurality of teeth 10 provided in a wavy tooth formation. At the end 7 each ridge 9 terminates at an end tooth or land 11 extending from the external periphery 3 towards the centre of the tool 1, and each land is provided with three chip breaker teeth 12.
Claims (2)
- <claim-text>CLAIMS1. A rotary cutting tool for the rough machining of difficult materials, the toot being of solid carbide with a plurality of helical toothed flutes of differential pitch defining alternating peaks and troughs and extending from an end of the tool towards a shank of the tool, with multiple teeth on the end of the tool having a radial rake of QO to I 2c. with a chip breaker facility provided on at least some of the end teeth; and with each end tooth having a dish angle of 3° to 12°.</claim-text> <claim-text>2, A tool as claimed in Claim 1, wherein the flutes have the same helix angle.</claim-text> <claim-text>3. A tool as claimed in Clam 1, wherein the flutes have a differential helix angle.</claim-text> <claim-text>4. A tool as claimed in any preceding Claim, wherein the carbide is tungsten carbide.</claim-text> <claim-text>5. A tool as claimed in any preceding Claim, wherein the radial rake angle is 8° or thereabouts.</claim-text> <claim-text>6. A toot as claimed in any preceding Claim, wherein the chip breaker facility is provided on all end teeth.</claim-text> <claim-text>7. A tool as claimed in any preceding Claim, wherein the chip breaker facility comprises at least one groove or notch.</claim-text> <claim-text>8. A tool as claimed in any preceding Claim, wherein a plurality of chip breaker grooves or notches are provided at spaced locations along some or all of the end teeth.</claim-text> <claim-text>9. A tool as claimed in Claim 8, wherein two or three chip breaker grooves or notches are provided on each end tooth.</claim-text> <claim-text>10. A tool as claimed in Claim 8, wherein different numbers of chip breaker grooves or notches are provided on different end teeth.</claim-text> <claim-text>11. A tool as claimed in Claim 7, and any claim appended thereto, wherein each chip breaker groove or notch is of <1.5mm depth.</claim-text> <claim-text>12. A tool as claimed in Claim 7, and any claim appended thereto, wherein each chip breaker groove or notch is 0.5 depth, or thereabouts.</claim-text> <claim-text>13. A tool as claimed in Claim 7, and any claim appended thereto, wherein each chip breaker groove or notch is of 45° included angle, or thereabouts.</claim-text> <claim-text>14. A tool as claimed in any preceding claim, wherein the dish angle is 1001 or thereabouts.</claim-text> <claim-text>15. A tool as claimed in any preceding claim, wherein the teeth of each flute are at
- 2.0mm pitch, or thereabouts.</claim-text> <claim-text>16. A tool as claimed in any preceding claim, wherein the teeth of each flute are to 0.35mm depth, or thereabouts.</claim-text> <claim-text>17. A tool as claimed in any preceding claim, wherein the flutes are provided with wavy tooth formations.</claim-text> <claim-text>18. A tool as claimed in any preceding claim, wherein the tool is provided with a performance enhancing and/or friction reducing coating.</claim-text> <claim-text>19. A tool as claimed in Claim 18, wherein the coating is applied by PVD.</claim-text> <claim-text>20. A rotary cutting tool substantially as hereinbefore described with reference to the accompanying drawings.</claim-text>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1116755.8A GB201116755D0 (en) | 2011-09-29 | 2011-09-29 | Rotary cutting tool |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201217029D0 GB201217029D0 (en) | 2012-11-07 |
| GB2495200A true GB2495200A (en) | 2013-04-03 |
| GB2495200B GB2495200B (en) | 2017-01-11 |
Family
ID=44994148
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1116755.8A Ceased GB201116755D0 (en) | 2011-09-29 | 2011-09-29 | Rotary cutting tool |
| GB1217029.6A Active GB2495200B (en) | 2011-09-29 | 2012-09-25 | Rotary cutting tool with helical toothed flutes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1116755.8A Ceased GB201116755D0 (en) | 2011-09-29 | 2011-09-29 | Rotary cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB201116755D0 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209566A (en) * | 2013-05-30 | 2014-12-17 | 钴碳化钨硬质合金公司 | End mill with high ramp angle capability |
| CN105618828A (en) * | 2016-04-08 | 2016-06-01 | 苏州阿诺精密切削技术股份有限公司 | Fracture-toothed rough milling cutter |
| EP3037198A1 (en) * | 2014-12-23 | 2016-06-29 | Hsin-Tien Chang | Milling cutter for orbital drilling |
| USD774573S1 (en) | 2014-04-10 | 2016-12-20 | Kennametal Inc | Cutting tool with W-shaped flute gully |
| US9724768B2 (en) | 2014-04-10 | 2017-08-08 | Kennametal Inc | Cutting tool with enhanced chip evacuation capability and method of making same |
| US9878379B2 (en) | 2015-04-22 | 2018-01-30 | Kennametal Inc. | Cutting tool with enhanced chip evacuation capability and method of making same |
| CN108405946A (en) * | 2018-05-17 | 2018-08-17 | 大连理工大学 | Inhibit micro- tooth row cloth design method of the micro- tooth milling cutter cutting edge edge breakage of multiple-cutting-edge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010096280A2 (en) * | 2009-02-17 | 2010-08-26 | Kennametal Inc. | Rotary cutting tool with wave pattern |
| US20110217132A1 (en) * | 2006-01-04 | 2011-09-08 | Sgs Tool Company | Rotary cutting tool |
| GB2487303A (en) * | 2011-01-17 | 2012-07-18 | Kennametal Inc | Monolithic end mill suitable to be made of ceramic material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1854265U (en) * | 1962-04-10 | 1962-06-28 | Albert Strasmann Fa | END MILLS WITH SEMI-CIRCULAR END, ESPECIALLY FOR THE PRODUCTION OF COUNTERS OR. DGL. |
| US4810136A (en) * | 1983-11-09 | 1989-03-07 | The Boeing Company | Milling cutter for composite laminates |
-
2011
- 2011-09-29 GB GBGB1116755.8A patent/GB201116755D0/en not_active Ceased
-
2012
- 2012-09-25 GB GB1217029.6A patent/GB2495200B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110217132A1 (en) * | 2006-01-04 | 2011-09-08 | Sgs Tool Company | Rotary cutting tool |
| WO2010096280A2 (en) * | 2009-02-17 | 2010-08-26 | Kennametal Inc. | Rotary cutting tool with wave pattern |
| GB2487303A (en) * | 2011-01-17 | 2012-07-18 | Kennametal Inc | Monolithic end mill suitable to be made of ceramic material |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209566A (en) * | 2013-05-30 | 2014-12-17 | 钴碳化钨硬质合金公司 | End mill with high ramp angle capability |
| USD774573S1 (en) | 2014-04-10 | 2016-12-20 | Kennametal Inc | Cutting tool with W-shaped flute gully |
| US9724768B2 (en) | 2014-04-10 | 2017-08-08 | Kennametal Inc | Cutting tool with enhanced chip evacuation capability and method of making same |
| US10682712B2 (en) | 2014-04-10 | 2020-06-16 | Kennametal Inc. | Cutting tool with enhanced chip evacuation capability and method of making same |
| EP3037198A1 (en) * | 2014-12-23 | 2016-06-29 | Hsin-Tien Chang | Milling cutter for orbital drilling |
| CN105983719A (en) * | 2014-12-23 | 2016-10-05 | 张新添 | Spiral feed type drilling and milling cutter |
| US9937566B2 (en) | 2014-12-23 | 2018-04-10 | Hsin-Tien Chang | Spirally-fed drilling and milling cutter |
| CN105983719B (en) * | 2014-12-23 | 2018-12-28 | 张新添 | Spiral feed type drilling and milling cutter |
| US9878379B2 (en) | 2015-04-22 | 2018-01-30 | Kennametal Inc. | Cutting tool with enhanced chip evacuation capability and method of making same |
| CN105618828A (en) * | 2016-04-08 | 2016-06-01 | 苏州阿诺精密切削技术股份有限公司 | Fracture-toothed rough milling cutter |
| CN108405946A (en) * | 2018-05-17 | 2018-08-17 | 大连理工大学 | Inhibit micro- tooth row cloth design method of the micro- tooth milling cutter cutting edge edge breakage of multiple-cutting-edge |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2495200B (en) | 2017-01-11 |
| GB201116755D0 (en) | 2011-11-09 |
| GB201217029D0 (en) | 2012-11-07 |
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