WO1981003137A1 - Engineers cutting tools - Google Patents
Engineers cutting tools Download PDFInfo
- Publication number
- WO1981003137A1 WO1981003137A1 PCT/GB1981/000071 GB8100071W WO8103137A1 WO 1981003137 A1 WO1981003137 A1 WO 1981003137A1 GB 8100071 W GB8100071 W GB 8100071W WO 8103137 A1 WO8103137 A1 WO 8103137A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flute
- tool
- engineers
- helical
- roughing
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
Definitions
- the invention relates to engineers cutting tools for metal working, which are particularly suitable for use in machine tools in which the tool spindle rotates .
- a tool according to the invention comprises a shank having two or more helical flutes, a helical flute face piece secured to each flute, one of the face pieces having a cutting edge extending radially from a periphery of the tool to beyond the longitudinal axis of the tool.
- Such a tool both produces and finishes a hole by cutting, and can also be used for boring spot facing, plunging or ramping in, drilling and reaming, milling, key-seating, and die-sinking, for example.
- the flute face pieces can automatically be re-ground to shape owing to the flutes being helical and at least one face piece being completely radial.
- the helical form of the flutes effectively permanently builds in a radial rake from the outside diameter through to the centre at least.
- the tool shank is preferably of alloy steel.
- the flute pieces are preferably of tungsten carbide, ceramic or a specialist cast alloy such as those known by the Trade Marks STELLITE and TANTUNG, or high speed steel and secured in position on the flute faces by welding or bra2ing.
- the face pieces may be castellated at least at the tip to help break up the metal chips produced in use, and optionally also to provide coolant channels.
- Figure 1 is a side view of a tool according to the invention
- Figures 2 to 5 are end views of the tool of Figure 1 and other similar tools;
- FIGS 6 to 9 are side views of the tips of tools similar to that of Figure 1;
- FIG. 10 illustrates typical two-flute tip sets for use on tools according to the invention
- Figure 11 illustrates typical tool periphery geometry
- Figure 12 shows schematically on an enlarged scale the tip of the tool of Figure 1 advancing into a work piece.
- the tool comprises a shank 20 of alloy steel having flutes 22, 23 ( Figure 2).
- the flutes 22,23 respectively have helical tungsten carbide face pieces 32,33 brazed thereto.
- the (larger) flute 23 functions as a roughing flute in drilling and extends radially from a periphery of the tool at the top of Figures 1 and 2 to beyond the axis of the tool (below the centre in Figures 1 and 2) .
- the (smaller) flute 22 is a finishing flute and set behind the roughing flute 23 in the axial direction of the tool advance in drilling as best shown in Figure 12.
- the roughing face piece 33 is shown advancing to the right into a workpiece; in the lower part its position 180° of rotation earlier is shown by a broken line to emphasize the relative (leftward) position of the face piece 32.
- the tips of the tools in Figures 1 to 9 are varied according to the use for which they are intended, that is whether primarily for dilling, traversing, or producing a flat bottomed surface.
- the corner edges of the face pieces axe chamfered as at 39 to produce a size-finished hole due to the relative positions of the ground angles.
- the tips in Figures 3 and 5 have a roughing face piece 32 and two finishing face pieces 33,34 equally spaced radially about the tool axis, and set one behind another in the axial direction of tool advance.
- the extra finishing flute cuts a smoother internal finish.
- the tips in Figures 4 and 5 have castellations on the face of the roughing face piece 32.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
- Milling Processes (AREA)
Abstract
An engineers cutting tool comprises a shank (20) having helical flutes (22, 23) and helical face pieces (32, 33) brazed thereto. The larger flute (23) functions as a roughing flute in drilling and extends radially from a periphery of the tool to beyond the axis. The smaller flute (22) is a finishing flute and set behind the roughing flute (23).
Description
TITLE :
Engineers Cutting Tools TECHNICAl, FIELD
The invention relates to engineers cutting tools for metal working, which are particularly suitable for use in machine tools in which the tool spindle rotates .
THE INVENTION
A tool according to the invention comprises a shank having two or more helical flutes, a helical flute face piece secured to each flute, one of the face pieces having a cutting edge extending radially from a periphery of the tool to beyond the longitudinal axis of the tool.
Such a tool both produces and finishes a hole by cutting, and can also be used for boring spot facing, plunging or ramping in, drilling and reaming, milling, key-seating, and die-sinking, for example. The flute face pieces can automatically be re-ground to shape
owing to the flutes being helical and at least one face piece being completely radial. The helical form of the flutes effectively permanently builds in a radial rake from the outside diameter through to the centre at least.
The tool shank is preferably of alloy steel. The flute pieces are preferably of tungsten carbide, ceramic or a specialist cast alloy such as those known by the Trade Marks STELLITE and TANTUNG, or high speed steel and secured in position on the flute faces by welding or bra2ing. The face pieces may be castellated at least at the tip to help break up the metal chips produced in use, and optionally also to provide coolant channels.
DRAWINGS :- Figure 1 is a side view of a tool according to the invention; Figures 2 to 5 are end views of the tool of Figure 1 and other similar tools;
Figures 6 to 9 are side views of the tips of tools similar to that of Figure 1;
Figure 10 illustrates typical two-flute tip sets for use on tools according to the invention;
Figure 11 illustrates typical tool periphery geometry; and
Figure 12 shows schematically on an enlarged scale the tip of the tool of Figure 1 advancing into a work piece.
BEST MODE With particular reference to Figure 1, the tool comprises a shank 20 of alloy steel having flutes 22, 23 (Figure 2). The flutes 22,23 respectively have helical tungsten carbide face pieces 32,33 brazed thereto. The (larger) flute 23 functions as a roughing flute in drilling and extends radially from a periphery of the tool at the top of Figures 1 and 2 to beyond the axis of the tool (below the centre in Figures 1 and 2) . The (smaller) flute 22 is a finishing flute and set behind the roughing flute 23 in the axial direction of the tool advance in drilling as best shown in Figure 12. In the upper part of Figure 12, the roughing face piece 33 is shown advancing to the right into a workpiece; in the lower part its position 180° of rotation earlier is shown by a broken line to emphasize the relative (leftward) position of the face piece 32.
The tips of the tools in Figures 1 to 9 are varied according to the use for which they are intended, that is whether primarily for dilling, traversing, or producing a flat bottomed surface. The corner edges of
the face pieces axe chamfered as at 39 to produce a size-finished hole due to the relative positions of the ground angles.
The tips in Figures 3 and 5 have a roughing face piece 32 and two finishing face pieces 33,34 equally spaced radially about the tool axis, and set one behind another in the axial direction of tool advance. The extra finishing flute cuts a smoother internal finish.
The tips in Figures 4 and 5 have castellations on the face of the roughing face piece 32.
Claims
1. An engineers cutting tool comprising a shank 20 having helical flutes 22,23 and a helical flute face piece 32,33 secured to each flute characterised by one of the flute face pieces 32 having a cutting edge extending radially from a periphery of the tool to be beyond the longitudinal axis of the tool.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8181900971T DE3165738D1 (en) | 1980-05-08 | 1981-04-16 | Engineers cutting tools |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8015217 | 1980-05-08 | ||
GB8015217 | 1980-05-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1981003137A1 true WO1981003137A1 (en) | 1981-11-12 |
Family
ID=10513277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1981/000071 WO1981003137A1 (en) | 1980-05-08 | 1981-04-16 | Engineers cutting tools |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0058152B1 (en) |
JP (1) | JPS57500550A (en) |
DE (2) | DE8107329U1 (en) |
WO (1) | WO1981003137A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149329A (en) * | 1983-10-03 | 1985-06-12 | Kennametal Inc | A two-prong rotary bit, especially for use with roof drills, and insert therefor |
US4889455A (en) * | 1987-05-21 | 1989-12-26 | Sandvik Ab | Drill |
WO1994020248A1 (en) * | 1993-03-11 | 1994-09-15 | Fzm Forschungszentrum Maschinenbau Gmbh | Precision boring or drilling tool with multiple cutting edges |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009015278A1 (en) * | 2009-04-01 | 2010-10-14 | Botek Präzisionsbohrtechnik Gmbh | Single-fluted gun drills |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB530113A (en) * | 1939-05-30 | 1940-12-05 | Erhard Bertl | Improvements relating to percussive drilling bits |
US3014386A (en) * | 1957-09-03 | 1961-12-26 | United Greenfield Corp | Drill |
GB961449A (en) * | 1962-03-19 | 1964-06-24 | Ass Elect Ind | Improvements relating to drills |
DE2416157A1 (en) * | 1974-04-03 | 1975-10-23 | Heller Geb | DRILLING TOOL |
US3938231A (en) * | 1975-03-11 | 1976-02-17 | The Valeron Corporation | Center cutting end mill |
GB2016316A (en) * | 1978-03-02 | 1979-09-26 | Komet Stahlhalter Werkzeug | Drilling tool for drilling holes in solid metal workpieces |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1161969A (en) * | 1968-03-07 | 1969-08-20 | Marwn Cutting Tools Ltd | End-Milling Cutters |
JPS5115909A (en) * | 1974-07-31 | 1976-02-07 | Nippon Electric Co | JIDODAIYARU SOCHI |
JPS5346514A (en) * | 1976-10-08 | 1978-04-26 | Toyota Motor Corp | Alarm system for clogging in air-cleaner |
-
1981
- 1981-03-13 DE DE19818107329 patent/DE8107329U1/en not_active Expired
- 1981-04-16 DE DE8181900971T patent/DE3165738D1/en not_active Expired
- 1981-04-16 JP JP50116881A patent/JPS57500550A/ja active Pending
- 1981-04-16 WO PCT/GB1981/000071 patent/WO1981003137A1/en active IP Right Grant
- 1981-04-16 EP EP81900971A patent/EP0058152B1/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB530113A (en) * | 1939-05-30 | 1940-12-05 | Erhard Bertl | Improvements relating to percussive drilling bits |
US3014386A (en) * | 1957-09-03 | 1961-12-26 | United Greenfield Corp | Drill |
GB961449A (en) * | 1962-03-19 | 1964-06-24 | Ass Elect Ind | Improvements relating to drills |
DE2416157A1 (en) * | 1974-04-03 | 1975-10-23 | Heller Geb | DRILLING TOOL |
US3938231A (en) * | 1975-03-11 | 1976-02-17 | The Valeron Corporation | Center cutting end mill |
GB2016316A (en) * | 1978-03-02 | 1979-09-26 | Komet Stahlhalter Werkzeug | Drilling tool for drilling holes in solid metal workpieces |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149329A (en) * | 1983-10-03 | 1985-06-12 | Kennametal Inc | A two-prong rotary bit, especially for use with roof drills, and insert therefor |
US4889455A (en) * | 1987-05-21 | 1989-12-26 | Sandvik Ab | Drill |
WO1994020248A1 (en) * | 1993-03-11 | 1994-09-15 | Fzm Forschungszentrum Maschinenbau Gmbh | Precision boring or drilling tool with multiple cutting edges |
Also Published As
Publication number | Publication date |
---|---|
DE8107329U1 (en) | 1981-08-13 |
EP0058152B1 (en) | 1984-08-29 |
DE3165738D1 (en) | 1984-10-04 |
JPS57500550A (en) | 1982-04-01 |
EP0058152A1 (en) | 1982-08-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6901642B2 (en) | Cutting tool, insert holder and machining method | |
EP0528243B1 (en) | Diamond rotary cutter flute geometry | |
US5779399A (en) | Rotary cutting apparatus | |
JP2815147B2 (en) | Boring and milling tools | |
US4470733A (en) | Multiple function cutting tool | |
US10195675B2 (en) | Twist drill with unequal flute spacing and unequal relief angles | |
IL42761A (en) | Twist drill and method for making it | |
KR970006957B1 (en) | High speed burnishing drill | |
EP0058152B1 (en) | Engineers cutting tools | |
WO1996003242A1 (en) | Tool-bit holder | |
US20220105574A1 (en) | Drilling tool | |
JPH0258042B2 (en) | ||
JPH11170106A (en) | Drill | |
CN107598278A (en) | A kind of left-handed right cut reamer of staight shank for through hole | |
CN209598279U (en) | A kind of solid carbide drill, ream, chamfering type compound tool | |
JP3036343B2 (en) | End mill | |
JPH0310451B2 (en) | ||
JPH07251312A (en) | Drill | |
CN218657124U (en) | Strong chip-removing straight-groove reamer | |
Ema et al. | Cutting performance of drills with three cutting edges (effects of chisel edge shapes on the cutting performance) | |
CN218277312U (en) | Groove drill | |
CN219818075U (en) | Indexable chamfering blade | |
JPH07195224A (en) | End mill | |
JP3821108B2 (en) | Drill with chip breaker | |
EP4410461A1 (en) | Drill and method of producing drilled product |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 1981900971 Country of ref document: EP |
|
AK | Designated states |
Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Designated state(s): DE FR GB NL SE |
|
WWP | Wipo information: published in national office |
Ref document number: 1981900971 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1981900971 Country of ref document: EP |