WO2010062850A1 - Système d'injection de réfrigérant dans un outil de découpe rotatif - Google Patents

Système d'injection de réfrigérant dans un outil de découpe rotatif Download PDF

Info

Publication number
WO2010062850A1
WO2010062850A1 PCT/US2009/065505 US2009065505W WO2010062850A1 WO 2010062850 A1 WO2010062850 A1 WO 2010062850A1 US 2009065505 W US2009065505 W US 2009065505W WO 2010062850 A1 WO2010062850 A1 WO 2010062850A1
Authority
WO
WIPO (PCT)
Prior art keywords
collar
holes
nut portion
cutting tool
coolant
Prior art date
Application number
PCT/US2009/065505
Other languages
English (en)
Inventor
Troy D. Marusich
Brian Becker
Cody Johnson
Original Assignee
Third Wave Systems
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 Third Wave Systems filed Critical Third Wave Systems
Publication of WO2010062850A1 publication Critical patent/WO2010062850A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
    • B23Q11/1023—Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/24—Cooling or lubrication means

Definitions

  • the present invention relates generally to a coolant delivery system. More particularly, the present invention relates to a coolant delivery system in a rotating cutting tool which effectively removes chips or swarf from cutting edges and flutes of the cutting tool.
  • material is removed in single or multiple sequences to achieve desired shape and size of a final part.
  • material is removed by rotating a work piece against a cutting tool, or rotating a cutting tool against a work piece, depending on what type of process is used.
  • the material removed during these processes is generally referred to as chips or swarf. It is known in the art that it is important to keep chips or swarf away from a cutting tool and especially from cutting edges of a cutting tool and/or flutes of a cutting tool.
  • chips or swarf are not removed properly, these chips or swarf could get clogged between two consecutive teeth and causing the cutting tool to rub against work piece without removing any material. This may result in damage to the work piece surface, breakage of the cutting tool, and/or even damage to a machine tool that rotates the cutting tool in some cases.
  • Coolant could be delivered by various mechanisms and at various flow rates and pressures.
  • Most commonly used coolant discharge methods on a machine includes either or all of following: 1) flood coolant - discharge from around a spindle onto a tool at lower pressures; 2) through-spindle coolant - discharge from inside a spindle flowing out from sides onto a tool; and 3) through-spindle-through- tool - discharge where coolant is supplied through a spindle and through channels inside a tool onto a cutting edge of the tool.
  • the latter two mechanisms offer delivery of coolant at higher pressures of the order from 200 Pounds/Square Inch (PSI) to 2000 PSI.
  • PSI Pounds/Square Inch
  • Coolant flow rate can also be adjusted depending on type of coolant pump, but the coolant flow rate is generally in the order of 2 gallons-per-minute (GPM) to 50 gallons-per-minute.
  • GPM gallons-per-minute
  • These individual methods have their own advantages and disadvantages.
  • channels need to be made inside the tool material in certain predefined arrangement such that the coolant flows through these continuous hollow path channels and flows out at other end on to the desired area of the tool, thus making the tool body hollow. Examples of which can be found in U.S. Patent Nos.
  • this through-spindle-through-tool delivery method requires that each cutting tooth or flute have at least one coolant channel for sufficient availability of coolant and effective removal of chips with that coolant.
  • coolant there is a limitation on how many channels can be made so that overall performance of a tool is not affected. Therefore, there is a desire for an improved coolant delivery system in effectively removing chips or swarf from cutting edges and flutes of the cutting tool.
  • the present invention provides a coolant delivery system in a rotating cutting tool which effectively removes chips or swarf from cutting edges and flutes of the cutting tool. More particularly, the present invention provides a coolant delivery system which directs high pressure machining coolant from a back end of a tool holder onto individual flutes or teeth of a cutting tool whereby the coolant flows through axial grooves of a cylinder portion of a collar, into a circumferential groove in a nut portion of the collar, and onto each flute of the cutting tool through a plurality of holes on the face of the nut portion of the collar.
  • a coolant delivery system comprises: a cutting tool having a longitudinal axis and a plurality of flutes disposed on the outside surface of the cutting tool, and the cutting tool being rotated around the longitudinal axis; a tool holder including a bore; a collar having a nut portion and a cylinder portion, the collar being disposed and retained within the bore of the tool holder, a back end of the cutting tool being disposed within a bore of the collar and retained by the nut portion of the collar, and the cylinder portion of the collar being disposed and retained within the bore of the tool holder; and wherein the cylinder portion of the collar includes a plurality of grooves for delivering pressurized coolant from the back end of the tool holder to the nut portion of the collar, and the nut portion of the collar includes a plurality of holes for delivering pressurized coolant from the collar to corresponding flutes of the rotating cutting tool.
  • each of the holes of the nut portion corresponds to each of the flutes.
  • the nut portion includes more holes than number of flutes.
  • the collar is made of any suitable material, preferably ferrous material, with an outer diameter equal to an inner diameter of the tool holder, and an inner diameter equal to an outer diameter of the cutting tool.
  • the collar includes a plurality of grooves machined on the inner diameter in the length direction placed at a certain distance from each other. This distance could be the same or different between successive grooves. These grooves open into a circumferential groove on the inner diameter preferably located at the end which is closer to the cutting edge.
  • the collar has a circular circumference groove and a plurality of holes located on the front end face of the collar opening into the circular circumference groove.
  • the holes can be made at a certain angle with an axis of the collar or straight at 90 degrees.
  • the number of holes can be the same as number of flutes or teeth or higher.
  • the present invention also provides a method of delivering coolant from the back end of a tool holder onto flutes of a cutting tool.
  • the cutting tool is placed inside a collar.
  • Through spindle pressurized coolant coming from the back end of the tool holder is delivered from the circumferential groove of the collar onto each of the flutes of the cutting tool.
  • the size of the holes depend on desired pressure at given coolant flow rate as the pressure depends on the diameter or cross-sectional area of the hole. It is also noted that the holes are preferably circular in shape, but can be different shapes such as square or diamond or any other geometric shape that allows coolant discharge at the desired pressure.
  • the collar rotates with the cutting tool, so that high pressure coolant is in fluid communication with the flutes.
  • coolant is applied in an effective manner on each flute or cutting tooth to remove chips from cutting edges and flutes.
  • FIG. 1 illustrates a perspective view of one embodiment of a coolant delivery system, in accordance with the principles of the present invention.
  • FIG. 2 illustrates an enlarged perspective view of the coolant delivery system at a front end, in accordance with the principles of the present invention.
  • FIG. 3 illustrates a cross-sectional view of the coolant delivery system of FIG. 2 having a cutting tool in use.
  • FIG. 4 illustrates a front end view of the coolant delivery system of FIG. 2.
  • FIG. 5 shows a perspective view of one embodiment of the coolant delivery system of FIG. 1 without a cutting tool and a collar mounted at a front end of the coolant delivery system, in accordance with the principles of the present invention.
  • FIG. 6 shows a side view of one embodiment of the cutting tool and the collar of the coolant delivery system of FIG. 1.
  • FIG. 7 shows a perspective view of one embodiment of the collar of the coolant delivery system of FIG. 1 having a nut portion and a cylinder portion.
  • FIG. 8 shows a side view of one embodiment of the collar of the coolant delivery system shown in FIG. 7.
  • FIG. 9 shows a perspective view of the cylinder portion of the collar shown in FIG. 7.
  • FIG. 10 shows a bottom view of the nut portion of the collar shown in FIG. 7.
  • FIG. 1 illustrates one embodiment of a coolant delivery system 100, in accordance with the principles of the present invention.
  • the coolant delivery system 100 includes a cutting tool 102, a tool holder 104, and a collar 106.
  • the cutting tool 102 includes a longitudinal axis A and a plurality of flutes 108 disposed on an outside surface of the cutting tool 102.
  • the cutting tool 102 is mounted on a spindle (not shown) and rotated around the longitudinal axis A.
  • the tool holder 104 includes a bore 110.
  • the collar 106 includes a nut portion 112 and a cylinder portion 114. The collar 106 is disposed and retained within the bore 110 of the tool holder 104.
  • a back end of the cutting tool 102 is placed within a bore 118 of the collar 106 and retained by the nut portion 112 of the collar 106.
  • the cylinder portion 114 of the collar 106 is disposed and retained within the bore 110 of the tool holder 104.
  • FIGs. 5-10 illustrate one embodiment of a coolant delivery system 100.
  • the cylinder portion 114 of the collar 106 includes a plurality of grooves 120a, 120b for delivering pressurized coolant from a back end 117 of the tool holder 104 to the nut portion 114 of the collar 106.
  • the groove 120a is a cut-through slot extending along the side wall of the cylinder portion 114
  • the groove 120b is shorter than the groove 120a and is a cut-through slot extending along the side wall of the cylinder portion 114.
  • the cylinder portion 114 may include additional grooves to deliver coolant from the back end 117 of the tool holder 104 to a front end 124 of the nut portion 112.
  • the nut portion 112 of the collar 106 includes a plurality of holes 122 for delivering pressurized coolant from the collar 106 to corresponding flutes 108 of the rotating cutting tool 102.
  • each of the holes 122 of the nut portion is a plurality of holes 122 for delivering pressurized coolant from the collar 106 to corresponding flutes 108 of the rotating cutting tool 102.
  • the nut portion 112 corresponds to each of the flutes 108.
  • the nut portion 112 includes more holes 122 than the number of flutes 108.
  • the hole 122 of the nut portion 112 is a through hole in fluid communication with a circumferential groove 126 (see FIG. 10) disposed on the back side 128 of the nut portion 112.
  • the coolant flows from the back end 117 of the tool holder 104, through the grooves 120a, 120b of the cylinder portion 114 of the collar 106, to the circumferential groove 126 on the back side 128 of the nut portion 112 of the collar 106, then flows from the circumferential groove 126, through the holes 122, and onto the flutes 108 of the cutting tool 102.
  • the cutting tool 102 mills into a work piece 130, and the coolant is directed to the flutes 108 of the cutting tool 102.
  • the coolant flows to cutting edges of the cutting tool 102 whereby chips or swarf from the drilling/cutting/milling process are removed from the cutting tool 102.
  • the flutes or cutting edges of the cutting tool 102 are not clogged by the chips or swarf during the drilling/cutting/milling process.
  • the collar is made of any suitable material, preferably ferrous material, with an outer diameter equal to an inner diameter of the tool holder, and an inner diameter equal to an outer diameter of the cutting tool.
  • the collar includes a plurality of grooves, such as 120a,b, machined on the inner diameter in the length direction placed at a certain distance from each other. This distance could be the same or different between successive grooves. These grooves open into a circumferential groove, such as 126, on the inner diameter preferably located at the end which is closer to the cutting edge.
  • the through holes 122 can be made at a certain angle with an axis of the collar or straight at 90 degrees.
  • the number of through holes 122 are the same as number of flutes or teeth or higher.
  • the size of the through holes depend on desired pressure at given coolant flow rate as the pressure depends on the diameter or cross-sectional area of the through hole. It is also appreciated that the holes are preferably circular in shape, but can be different shapes such as square or diamond or any other geometric shape that allows coolant discharge at the desired pressure.
  • the collar rotates with the cutting tool, so that high pressure coolant is in fluid communication with the flutes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

L'invention concerne un système et un procédé d'injection de réfrigérant dans un outil de découpe rotatif capable d'enlever efficacement les copeaux ou les ébarbures des bords de découpe et des cannelures de l’outil de découpe. Dans un mode de réalisation, le système d'injection de réfrigérant contient un collier de serrage avec une partie écrou présentant une pluralité de trous traversants et une rainure circonférentielle disposée au dos de la partie écrou, et une partie cylindre possédant un alésage et au moins une rainure sur une paroi latérale. Un diamètre externe de la partie cylindre est égal au diamètre interne du porte-outil, et un diamètre interne de la partie cylindre est égal au diamètre externe de l’outil de découpe, l’outil de découpe étant reçu et retenu par le collier de serrage, et le collier de serrage étant reçu et retenu par le porte-outil. Les trous traversants sont en communication fluide avec la rainure circonférentielle de la partie écrou et la rainure de la partie cylindre, et la rainure de la partie cylindre est en communication fluide avec une source de réfrigérant connectée à une extrémité arrière du porte-outil. De même, en service, le collier de serrage tourne avec l’outil de découpe de sorte que le réfrigérant haute pression est en communication fluide avec les cannelures.
PCT/US2009/065505 2008-11-26 2009-11-23 Système d'injection de réfrigérant dans un outil de découpe rotatif WO2010062850A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11816608P 2008-11-26 2008-11-26
US61/118,166 2008-11-26

Publications (1)

Publication Number Publication Date
WO2010062850A1 true WO2010062850A1 (fr) 2010-06-03

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013127606A1 (fr) * 2012-02-29 2013-09-06 Haimer Gmbh Mandrin de frettage comprenant un refroidissement d'outil
EP2666567A1 (fr) 2008-08-29 2013-11-27 Franz Haimer Maschinenbau KG Dispositif porte-outil
US20150283627A1 (en) * 2014-04-04 2015-10-08 Kennametal lndia Limited Reducer sleeve with thru coolant flow and a cutting assembly using such reducer sleeve
US10399150B2 (en) * 2017-06-05 2019-09-03 Kennametal Inc. Sealed collet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874808A (en) * 1973-11-01 1975-04-01 Briney Bushing Inc Drill bushing
US5984595A (en) * 1997-07-29 1999-11-16 Mst Corporation Tool holder
US7134812B2 (en) * 2002-07-17 2006-11-14 Kevin Beckington Tool coolant application and direction assembly
US20080056838A1 (en) * 2002-04-08 2008-03-06 Marusich Troy D High frequency tooth pass cutting method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874808A (en) * 1973-11-01 1975-04-01 Briney Bushing Inc Drill bushing
US5984595A (en) * 1997-07-29 1999-11-16 Mst Corporation Tool holder
US20080056838A1 (en) * 2002-04-08 2008-03-06 Marusich Troy D High frequency tooth pass cutting method
US7134812B2 (en) * 2002-07-17 2006-11-14 Kevin Beckington Tool coolant application and direction assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2666567A1 (fr) 2008-08-29 2013-11-27 Franz Haimer Maschinenbau KG Dispositif porte-outil
WO2013127606A1 (fr) * 2012-02-29 2013-09-06 Haimer Gmbh Mandrin de frettage comprenant un refroidissement d'outil
CN104254421A (zh) * 2012-02-29 2014-12-31 海莫有限公司 具有刀具冷却功能的收缩夹头
US9616541B2 (en) 2012-02-29 2017-04-11 Haimer Gmbh Shrink-fit chuck with tool cooling
US20150283627A1 (en) * 2014-04-04 2015-10-08 Kennametal lndia Limited Reducer sleeve with thru coolant flow and a cutting assembly using such reducer sleeve
US10160042B2 (en) * 2014-04-04 2018-12-25 Kennametal Inc. Reducer sleeve with thru coolant flow and a cutting assembly using such reducer sleeve
US10252346B2 (en) 2014-04-04 2019-04-09 Kennametal Inc. Reducer sleeve with thru coolant flow and a cutting assembly using such reducer sleeve
DE102015105047B4 (de) 2014-04-04 2023-05-25 Kennametal India Limited Reduziermuffe mit Kühlmitteldurchfluss und eine Schneidevorrichtung, die eine solche Reduziermuffe verwendet
US10399150B2 (en) * 2017-06-05 2019-09-03 Kennametal Inc. Sealed collet
US10967438B2 (en) 2017-06-05 2021-04-06 Kennametal Inc. Sealed collet

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