WO1983002412A1 - Cutting tools and blades - Google Patents
Cutting tools and blades Download PDFInfo
- Publication number
- WO1983002412A1 WO1983002412A1 PCT/GB1983/000006 GB8300006W WO8302412A1 WO 1983002412 A1 WO1983002412 A1 WO 1983002412A1 GB 8300006 W GB8300006 W GB 8300006W WO 8302412 A1 WO8302412 A1 WO 8302412A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- space
- edge
- shank
- tool
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/2265—Securing arrangements for bits or teeth or cutting inserts by means of a wedge
- B23C5/2269—Securing arrangements for bits or teeth or cutting inserts by means of a wedge for plate-like cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/202—Plate-like cutting inserts with special form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/16—Supporting or bottom surfaces
- B23C2200/165—Supporting or bottom surfaces with one or more grooves
Definitions
- the invention relates to engineers cutting tools suitable for the routing, boring, reaming, side and face cutting, or face, or straddle milling of ferrous or non-ferrous metals, wood or plastics materials for example, and is particularly but not exclusively concerned with the roughing of aluminium planks in the construction of air or space craft.
- a cutting tool comprises a shank having a space therein for receiving a blade, a wedge for securing the blade in the space, a screw for moving the wedge in relation to the shank, the space having a bottom edge inclined to the axis of the shank for contacting an entry edge of the blade, and a pin fixed in a side of the space for locking the blade in the space.
- a tool may have more than one such space for receiving a number of blades depending on the side and nature of the tool.
- the invention includes a bla de for securing in a space on such a tool, which blade may be sold together with the tool or separately as a replacement.
- the blade may be flat and have a cutting edge, a bottom face, an. entry edge preferably inclined to the cutting edge, and a guide groove extending from the entry edge to a locking recess on the side of the blade for receiving a locking pin.
- the blade may be helical and have a cutting edge, a bottom face, an entry edge, and a guide groove extending as set out above for a flat blade. In either case, the entry edge may be parallel to the cutting edge.
- the entry edge of a flat blade should be inclined to the cutting edge at the same angle as the bottom edge of the space for receiving the blade.
- the longitudinal position of the blade in relation to the shank determines the outside or cutting diameter of the tool, and makes it possible for this diameter to be adjusted, for example after regrinding of the blade. This is. facilitated by providing the blade with a flat bottom, face for engaging a stop pin on the tool, which end may be ground away as necessary,
- the locking recess is preferably a groove inclined to the guide groove and parallel to the entry edge, but anyway the locking recess should be shaped so as to make movement of the blade in at least two directions necessary for its removal from the shank.
- the tool shank is generally of alloy steel, while the blade may be of hard metal, tungsten carbide, high speed steel, ceramic, boron nitride or polycrystalline diamond, or at least have a cutting tip of such a material.
- the groove and locking recess may be ground in the blade or formed therein by a powder metallurgical technique.
- Figure 1 is a side view of a tool with two blades according to the invention
- Figure 2 is an end view corresponding to Figure 1;
- Figure 3 is a side view of the end of the tool at 90° to that of Figure 1; and
- Figure 4 comprises two side views of a blade according to the invention.
- the tool of Figure 1 has a shank 10 with only one drive flat 12 visible and a threaded draw-bar hole in the left hand end. Two blades 20 are received in spaces cut in the right hand end. A wedge 22 is provided for securing each blade 20. A screw (not shown) is threaded in a hole 24 in each wedge 22 and in the shank 10 at an angle to the flat faces of the blade 20 such that tightening of the screw moves the wedge 22 and secures the blade 20.
- Each blade 20 and the space for receiving it respectively has an entry edge 30 and a bottom edge 40 inclined to the axis of the shank 10.
- a pin 42 is fixed in the side of the space, and a stop 44 at the (left hand) end.
- each blade 20 has an outside diameter cutting edge 32 and a bottom face 34 to the left.
- a guide groove 36 extends from the entry edge 30 to a locking recess 38 which is in the form of a groove inclined to the guide groove 36 and parallel to the entry edge 30.
- the blade 20 has an end cutting edge 37 and a ramping-in cutting edge 39 inclined thereto.
- the blade 20 is mounted in the space on the shank 10 by aligning the guide groove 36 with the pin 42 and making a first radial movement as indicated by the arrow to the left in Figure 4. After the pin reaches the closed end of the groove 36, a second axial movement to the left as shown by the arrow at the right hand side of Figure 4 completes the positioning of the blade 20. The blade 20 is then secured by tightening a screw in the hole 24 to move the wedge 22 into the position shown. After use and regrinding of the blade 20, the bottom face 34also may be ground to shorten the blade 20 and allow it to be pushed further to the left in Figure 4 on repositioning on the shank 10. The entry edge 30 slides up the bottom edge 40 of the receiving space and so makes it possible to maintain the original outside diameter of the cutting edge 32.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
An engineers cutting tool is particularly suitable for roughing aluminium planks for aircraft. A shank (10) of alloy steel has a space therein for a blade (20) of hard metal. A wedge (22) secures the blade (20) in the space by means of a screw threaded in a blade (24). The space has a bottom edge (40) inclined to the axis of the shank (10), and a pin (42) fixed to the side. The blade (20) has an entry edge (30) for contacting the bottom edge (40) and a guide groove (not in Figure 1) for the pin (42). The longitudinal position of the blade (20) in relation to the shank (10) determines the outside or cutting diameter of the tool, and makes it possible for this diameter to be adjusted after regrinding. The blade (20) may by flat or helical.
Description
TITLE: Cutting Tools and Blades
DESCRIPTION:
Technical Field:
The invention relates to engineers cutting tools suitable for the routing, boring, reaming, side and face cutting, or face, or straddle milling of ferrous or non-ferrous metals, wood or plastics materials for example, and is particularly but not exclusively concerned with the roughing of aluminium planks in the construction of air or space craft.
Background Art:
Such tools in which a shank or block has blades removably secured thereto are known for example from Patent Specifications FR 919599 and US 2484314.
The Invention:
A cutting tool according to the invention comprises a shank having a space therein for receiving a blade, a wedge for securing the blade in the space, a screw
for moving the wedge in relation to the shank, the space having a bottom edge inclined to the axis of the shank for contacting an entry edge of the blade, and a pin fixed in a side of the space for locking the blade in the space. A tool may have more than one such space for receiving a number of blades depending on the side and nature of the tool.
The invention includes a bla de for securing in a space on such a tool, which blade may be sold together with the tool or separately as a replacement. The blade may be flat and have a cutting edge, a bottom face, an. entry edge preferably inclined to the cutting edge, and a guide groove extending from the entry edge to a locking recess on the side of the blade for receiving a locking pin. Alternatively, the blade may be helical and have a cutting edge, a bottom face, an entry edge, and a guide groove extending as set out above for a flat blade. In either case, the entry edge may be parallel to the cutting edge.
The entry edge of a flat blade should be inclined to the cutting edge at the same angle as the bottom edge of the space for receiving the blade. Thus the longitudinal position of the blade in relation to the shank determines the outside or cutting diameter of the tool, and makes it possible for this diameter to be adjusted,
for example after regrinding of the blade. This is. facilitated by providing the blade with a flat bottom, face for engaging a stop pin on the tool, which end may be ground away as necessary,
Cooperation between the locking pin and recess ensures that the blade is safely secured in the space on the tool, and cannot be flung out if the wedge becomes loose in use. The locking recess is preferably a groove inclined to the guide groove and parallel to the entry edge, but anyway the locking recess should be shaped so as to make movement of the blade in at least two directions necessary for its removal from the shank.
The tool shank is generally of alloy steel, while the blade may be of hard metal, tungsten carbide, high speed steel, ceramic, boron nitride or polycrystalline diamond, or at least have a cutting tip of such a material. The groove and locking recess may be ground in the blade or formed therein by a powder metallurgical technique.
Drawings: Figure 1 is a side view of a tool with two blades according to the invention;
Figure 2 is an end view corresponding to Figure 1; Figure 3 is a side view of the end of the tool at 90° to that of Figure 1; and
Figure 4 comprises two side views of a blade according to the invention.
Best Mode
The tool of Figure 1 has a shank 10 with only one drive flat 12 visible and a threaded draw-bar hole in the left hand end. Two blades 20 are received in spaces cut in the right hand end. A wedge 22 is provided for securing each blade 20. A screw (not shown) is threaded in a hole 24 in each wedge 22 and in the shank 10 at an angle to the flat faces of the blade 20 such that tightening of the screw moves the wedge 22 and secures the blade 20.
Each blade 20 and the space for receiving it respectively has an entry edge 30 and a bottom edge 40 inclined to the axis of the shank 10. A pin 42 is fixed in the side of the space, and a stop 44 at the (left hand) end.
As shown in Figure 4, each blade 20 has an outside diameter cutting edge 32 and a bottom face 34 to the left. A guide groove 36 extends from the entry edge 30 to a locking recess 38 which is in the form of a groove inclined to the guide groove 36 and parallel to the entry edge 30. To the right, the blade 20 has an end cutting edge 37
and a ramping-in cutting edge 39 inclined thereto.
The blade 20 is mounted in the space on the shank 10 by aligning the guide groove 36 with the pin 42 and making a first radial movement as indicated by the arrow to the left in Figure 4. After the pin reaches the closed end of the groove 36, a second axial movement to the left as shown by the arrow at the right hand side of Figure 4 completes the positioning of the blade 20. The blade 20 is then secured by tightening a screw in the hole 24 to move the wedge 22 into the position shown. After use and regrinding of the blade 20, the bottom face 34also may be ground to shorten the blade 20 and allow it to be pushed further to the left in Figure 4 on repositioning on the shank 10. The entry edge 30 slides up the bottom edge 40 of the receiving space and so makes it possible to maintain the original outside diameter of the cutting edge 32.
Claims
1. An engineers cutting tool which comprises a shank (10) having a space therein for receiving a blade (20), characterised by a wedge (22) for securing the blade (20) in the space, a screw for moving the wedge (22) in relation to the shank (10), the space having a bottom edge (40) inclined to the axis of the shank (10) for contacting an entry edge (30) of the blade (20), and a pin (42) fixed in a side of the space for locking the blade (20) in the space.
2. A blade (20) for securing in a space on a tool according to claim 1 characterized by the hlade (20) being flat and having a cutting edge (32), a bottom face
(34), an entry edge (30), and a guide groove (36) extending from the entry edge (30) to a locking recess (38) on the side of the blade (20) for receiving a locking pin (42).
3. A blade (20) according to claim 2 in which the entry edge is inclined to the cutting edge (32).
4. A blade (20) for securing in a space on a tool according to claim 1 characterized by the blade (.20) being helical and having a cutting edge (32) a bottom face (34), an entry edge (30), and a guide groove (36) extending from the entry edge (30) to a locking recess (38) on the side of the blade (20) for receiving the locking pin (42).
5. A blade (20) according to claim 4 in which the entry edge (30) is parallel to the cutting edge (32).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8201412820119 | 1982-01-19 | ||
GB8201412 | 1982-01-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1983002412A1 true WO1983002412A1 (en) | 1983-07-21 |
Family
ID=10527709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1983/000006 WO1983002412A1 (en) | 1982-01-19 | 1983-01-18 | Cutting tools and blades |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0098857A1 (en) |
WO (1) | WO1983002412A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10442014B2 (en) * | 2015-05-21 | 2019-10-15 | Kyocera Corporation | Holder, cutting tool, and method of manufacturing machined product using the same |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1397119A (en) * | 1921-01-19 | 1921-11-15 | American Standard Tool Company | Milling-cutter |
US1713847A (en) * | 1927-04-22 | 1929-05-21 | Continental Tool Works | Rotary cutter |
DE674112C (en) * | 1936-12-11 | 1939-04-05 | Elek Sche Unternehmungen Akt G | Cutter head with cutting knives evenly distributed around the circumference |
FR919599A (en) * | 1945-09-20 | 1947-03-12 | Milling cutter for metalworking | |
US2484314A (en) * | 1944-08-09 | 1949-10-11 | Borg Warner | Rotary stock removing method and apparatus |
GB642026A (en) * | 1948-07-02 | 1950-08-23 | Lloyd Ltd Richard | Improvements relating to milling and like rotary cutting tools of the inserted bladetype |
US2553151A (en) * | 1947-05-12 | 1951-05-15 | George W Sharp | Toolholder |
US3509612A (en) * | 1969-06-16 | 1970-05-05 | Borite Mfg Corp | Milling cutter and blade assembly |
US3861011A (en) * | 1972-09-01 | 1975-01-21 | Sumitomo Electric Industries | Milling cutter |
-
1983
- 1983-01-18 EP EP83900429A patent/EP0098857A1/en not_active Withdrawn
- 1983-01-18 WO PCT/GB1983/000006 patent/WO1983002412A1/en not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1397119A (en) * | 1921-01-19 | 1921-11-15 | American Standard Tool Company | Milling-cutter |
US1713847A (en) * | 1927-04-22 | 1929-05-21 | Continental Tool Works | Rotary cutter |
DE674112C (en) * | 1936-12-11 | 1939-04-05 | Elek Sche Unternehmungen Akt G | Cutter head with cutting knives evenly distributed around the circumference |
US2484314A (en) * | 1944-08-09 | 1949-10-11 | Borg Warner | Rotary stock removing method and apparatus |
FR919599A (en) * | 1945-09-20 | 1947-03-12 | Milling cutter for metalworking | |
US2553151A (en) * | 1947-05-12 | 1951-05-15 | George W Sharp | Toolholder |
GB642026A (en) * | 1948-07-02 | 1950-08-23 | Lloyd Ltd Richard | Improvements relating to milling and like rotary cutting tools of the inserted bladetype |
US3509612A (en) * | 1969-06-16 | 1970-05-05 | Borite Mfg Corp | Milling cutter and blade assembly |
US3861011A (en) * | 1972-09-01 | 1975-01-21 | Sumitomo Electric Industries | Milling cutter |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10442014B2 (en) * | 2015-05-21 | 2019-10-15 | Kyocera Corporation | Holder, cutting tool, and method of manufacturing machined product using the same |
Also Published As
Publication number | Publication date |
---|---|
EP0098857A1 (en) | 1984-01-25 |
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