WO1981003137A1 - Engineers cutting tools - Google Patents

Engineers cutting tools Download PDF

Info

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
Application number
PCT/GB1981/000071
Other languages
French (fr)
Inventor
D Wale
Original Assignee
Marwin Cutting Tools Ltd
D Wale
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Marwin Cutting Tools Ltd, D Wale filed Critical Marwin Cutting Tools Ltd
Priority to DE8181900971T priority Critical patent/DE3165738D1/en
Publication of WO1981003137A1 publication Critical patent/WO1981003137A1/en

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

CLAIM
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.
PCT/GB1981/000071 1980-05-08 1981-04-16 Engineers cutting tools WO1981003137A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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