GB2240740A - Toothed rotary cutting tools - Google Patents
Toothed rotary cutting tools Download PDFInfo
- Publication number
- GB2240740A GB2240740A GB9100399A GB9100399A GB2240740A GB 2240740 A GB2240740 A GB 2240740A GB 9100399 A GB9100399 A GB 9100399A GB 9100399 A GB9100399 A GB 9100399A GB 2240740 A GB2240740 A GB 2240740A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tool
- teeth
- rotary cutting
- cutting tools
- toothed rotary
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/003—Milling-cutters with vibration suppressing means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The cutting tool has an irregular tooth arrangement. This may be equivalent to removing one or more teeth from an otherwise regular array, or it may be by having uneven spacing throughout. It is particularly effective for fluted cylindrical tools such as milling cutters.
Description
"Improvements relatina to Rotarv Cutting Tools"
This invention relates to rotary cutting tools, and is particularly applicable to milling cutters.
Conventional wisdom is that, in such tools, the teeth or ribs should be uniformly spaced. This not only keeps the tool balanced but also maintains even co-operation with the workpiece, which is believed to be conducive to efficiency and a clean cut.
According to the present invention there is provided a toothed rotary cutting tool in which the teeth are irregularly arranged.
In the preferred form the teeth are formed by flutes in a generally cylindrical tool body, and usually the flutes will be helical, as in a milling cutter.
The irregularity may be equivalent to one or more missing teeth in a would-be regular array, and in one simple but effective form there is one such missing tooth in a would-be regular array of three. Alternatively the irregularity is from uneven spacing of the teeth throughout the arrangement.
It has been found that on rotary tools such as milling cutters the effect of such uneveness can have amazing results. For example, in one comparative trial, using a normal cutter and a cutter with uneven teeth, both cutters being of the same size and shape, identically powered and applied to the same quality workpiece, the unevenly toothed cutter completed the job about three times as fast as the normal one. This improved performance is particularly noticeable when "eating away" solid metal, as in making a slot, rather than when "nibbling", as in taking a shaving off a surface or edge.
Claims (7)
1. A toothed rotary cutting tool in which the teeth are irregularly arranged.
2. A tool as claimed in Claim 1, wherein teeth are formed by flutes in a generally cylindrical tool body.
3. A tool as claimed in Claim 2, wherein the flutes are helical.
4. A tool as claimed in Claim 2 or 3, wherein the tool is a milling cutter.
5. A tool as claimed in any preceding Claim, wherein the irregularity is equivalent to one or more missing teeth in a would-be regular array.
6. A tool as claimed in Claim 5, wherein the uneven spacing is equivalent to one missing tooth in a would-be regular array of three.
7. A tool as claimed in any one of Claims 1 to 4, wherein the irregularity is from uneven spacing of the teeth throughout the arrangement.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909002700A GB9002700D0 (en) | 1990-02-07 | 1990-02-07 | Improvements relating to cutting tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9100399D0 GB9100399D0 (en) | 1991-02-20 |
| GB2240740A true GB2240740A (en) | 1991-08-14 |
Family
ID=10670544
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB909002700A Pending GB9002700D0 (en) | 1990-02-07 | 1990-02-07 | Improvements relating to cutting tools |
| GB9100399A Withdrawn GB2240740A (en) | 1990-02-07 | 1991-01-09 | Toothed rotary cutting tools |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB909002700A Pending GB9002700D0 (en) | 1990-02-07 | 1990-02-07 | Improvements relating to cutting tools |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9002700D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2012958B1 (en) | 2006-04-04 | 2016-09-28 | Hanita Metal Works Ltd. | Face milling cutter |
| EP3500382B1 (en) | 2016-08-16 | 2022-08-24 | Kennametal Inc. | Tool body for a shell end mill and cutting tool |
| US11865629B2 (en) | 2021-11-04 | 2024-01-09 | Kennametal Inc. | Rotary cutting tool with high ramp angle capability |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563402A (en) * | 1943-04-02 | 1944-08-11 | George H Alexander Machinery L | Improvements relating to reamers, milling cutters and like cutting tools |
| GB1030993A (en) * | 1962-05-11 | 1966-05-25 | Derefa Ets | Improvements in milling cutters |
| GB1323607A (en) * | 1969-11-24 | 1973-07-18 | Sandco Ltd | Guide pad mounting on a drill |
| GB1546981A (en) * | 1976-11-17 | 1979-06-06 | Sandvik Ab | Drilling tool having inserts |
| GB2024060A (en) * | 1978-06-30 | 1980-01-09 | Hegenscheidt Gmbh Wilhelm | Drilling head |
| EP0195838A1 (en) * | 1985-03-27 | 1986-10-01 | Rockwell International Corporation | Reamer with unequally spaced flutes |
-
1990
- 1990-02-07 GB GB909002700A patent/GB9002700D0/en active Pending
-
1991
- 1991-01-09 GB GB9100399A patent/GB2240740A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563402A (en) * | 1943-04-02 | 1944-08-11 | George H Alexander Machinery L | Improvements relating to reamers, milling cutters and like cutting tools |
| GB1030993A (en) * | 1962-05-11 | 1966-05-25 | Derefa Ets | Improvements in milling cutters |
| GB1323607A (en) * | 1969-11-24 | 1973-07-18 | Sandco Ltd | Guide pad mounting on a drill |
| GB1546981A (en) * | 1976-11-17 | 1979-06-06 | Sandvik Ab | Drilling tool having inserts |
| GB2024060A (en) * | 1978-06-30 | 1980-01-09 | Hegenscheidt Gmbh Wilhelm | Drilling head |
| EP0195838A1 (en) * | 1985-03-27 | 1986-10-01 | Rockwell International Corporation | Reamer with unequally spaced flutes |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2012958B1 (en) | 2006-04-04 | 2016-09-28 | Hanita Metal Works Ltd. | Face milling cutter |
| EP2012958B2 (en) † | 2006-04-04 | 2019-12-18 | Hanita Metal Works Ltd. | Face milling cutter |
| EP3500382B1 (en) | 2016-08-16 | 2022-08-24 | Kennametal Inc. | Tool body for a shell end mill and cutting tool |
| US11865629B2 (en) | 2021-11-04 | 2024-01-09 | Kennametal Inc. | Rotary cutting tool with high ramp angle capability |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9002700D0 (en) | 1990-04-04 |
| GB9100399D0 (en) | 1991-02-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |