WO1981002266A1 - Systeme de mandrin - Google Patents

Systeme de mandrin Download PDF

Info

Publication number
WO1981002266A1
WO1981002266A1 PCT/US1980/000137 US8000137W WO8102266A1 WO 1981002266 A1 WO1981002266 A1 WO 1981002266A1 US 8000137 W US8000137 W US 8000137W WO 8102266 A1 WO8102266 A1 WO 8102266A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle
cutting tool
adapter
mounting
arbor assembly
Prior art date
Application number
PCT/US1980/000137
Other languages
English (en)
Inventor
J Drazy
Original Assignee
J Drazy
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 J Drazy filed Critical J Drazy
Priority to PCT/US1980/000137 priority Critical patent/WO1981002266A1/fr
Publication of WO1981002266A1 publication Critical patent/WO1981002266A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/26—Securing milling cutters to the driving spindle

Definitions

  • This invention relates generally to an arbor assembly and more particularly to a side loading mill arbor assembly.
  • a single one-piece arbor is first mounted to a spindle of the machine, and then the cutter is attached to the arbor, either with a plurality of bolts arranged in a circle, or with a centrally positioned arbor screw.
  • the cutter must somehow be held in alignment with the arbor while simultaneously threading one, or more, screws or bolts into the arbor. This is difficult to do on vertically- oriented spindles and particularly within the limited access generally provided on multiple spindle machines.
  • the cutters which may weigh on order of 9-14 Kg (20-30 pounds) , cannot be jacked into place, or held in place by temporary blocking since the physical presence of such shoring results in further restriction of the already limited space available for performing such tasks.
  • one milling machine has two horizontal spindles and two vertical spindles, each having a cutting tool attached thereto. It has heretofore been necessary for the machine oper ⁇ ator to crawl into the machine work zone, and lay on his back, on the machine bed, to change cutters on the vertical spindles.
  • the cutters had a diameter of approximately 180 mm (7 inches) and weighed about 11 Kg (25 pounds) and requir ⁇ ed one 8-hour shift for the operator to remove one cutter, and then align and install a replacement cutter. Needless to say, operators of such machines have avoided this frustrating and difficult task, with the result that cutters were not changed as often as they should have been for optimal operation.
  • the present invention is directed to over- coming one or more of the problems as set forth above.
  • an arbor assembly for mounting a cutting tool on a spindle includes a cutting tool adapter for holding the cutting tool, the cutting tool adapter being laterally separ ⁇ able from the spindle.
  • the present invention provides a two-piece arbor assembly by which mill cutters may now be safely and easily installed on a machine spindle by simply sliding one part of the assembly into the other. With all elements properly aligned, the bolts necessary for securing the assembly and cutter in such alignment may be easily installed and tightened. It is expected that by the present invention, a task that previously required 8 hours of difficult and frustrating work will now be accomplished in only a half-hour. Further, as outlined above, the problems of safety and accessibility are solved by the present invention. Brief Description of the Drawings
  • Fig. 1 is a diagrammatic, expanded, three- dimensional view of the arbor assembly of the present invention with the cutting tool and cutting tool adapter laterally spaced from the spindle and spindle adapter.
  • Fig. 2 is a diagrammatic, three-dimensional view of the arbor assembly of the present invention with the cutting tool and cutting tool adapter assembl- ed onto the spindle and spindle adapter.
  • Fig. 3 is a diagrammatic, and slightly enlarg ⁇ ed side elevational view of the arbor assembly of the present invention with portions of the spindle, arbor assembly and cutting tool broken away to show mounting details.
  • an arbor assembly 10 is disclos ⁇ ed in conjunction with a vertically oriented machine spindle 12 and a cutting tool 14.
  • the arbor assembly 10 includes a spindle adapter 16 and a side loading or laterally separable cutting tool adapter 18.
  • the spindle 12 has an upper end, not shown, operatively connected to a drive motor for rotation about a central axis 20. As shown in Fig. 1, a lower end of the spindle includes a bore 22 concentrically disposed with respect to the axis 20, a radially offset drive key 24, and a plurality of threaded holes 26.
  • the cutting tool 14 is an indexable insert facemill cutter assembly having a centrally disposed stepped bore 28 provided therein for accommodating means 29 for mounting the cutting tool to the arbor assembly such as by a threaded arbor screw 30, and a radially oriented keyway 31 in an upper portion thereof.
  • the spindle adapter 16 includes an upper surface 32 having a centrally disposed cylindrical knob 34 projecting perpendicularly from the upper surface 32 and a keyway 36 extending radially outwardly parallel 5 with the upper surface 32.
  • the spindle adapter 16 also includes a lower surface 38 having a drive key 40 projecting from the lower surface, and a plurality of holes 41 ⁇ extending between and normal to the upper and lower surfaces.
  • a curved sidewall 42 is disposed
  • a planar sidewall 46 is disposed between the upper and lower surfaces 32,38 and includes a plurality of threaded holes 48 extending inwardly
  • the spindle adapter 16 also includes a stepp ⁇ ed wall portion "50 defining a T-shaped first opening 52 adjacent the planar sidewall 46, a second opening 54 adjacent the lower surface 38 and a centrally disposed
  • the stepped wall portion also provides a shoulder 58 within the cavity 56, the shoul ⁇ der being disposed in parallel relationship with the upper and lower surfaces 32,38.
  • the cutting tool adapter 18 includes an upper surface 60, a lower surface 62 parallel to the upper surface and a stepped cylindrical projection 64 extend ⁇ ing from the lower surface for mateably engaging the stepped bore 28 of the cutting tool 14 and thereby
  • the projection 64 has a threaded bore 66 centrally formed therein for receiving the arbor screw 30.
  • the cutting tool adapter also includes a
  • a stepped wall portion 76 formed to mate with the cavity 56 defined by the stepped wall portion 50 of the spindle adapter 16, extends outwardly of the planar sidewalls 72,74 and includes a land 78 parallel with the upper and lower surfaces 60,62.
  • Means 80 for mounting the spindle adapter 16 to the spindle 12 are provided by plurality of bolts 82, having a length sufficient for extending through the holes 41 in the spindle adapter and engaging the threaded holes 26 provided in the spindle.
  • the arbor assembly 10 also includes means 84 for mounting the cutting tool adapter 18 to the spindle adapter 16 preferably by way of a plurality of bolts 86 having a length sufficient for extending through the holes 70 in the "cutting tool adapter and engaging the threaded holes 48 in the spindle adapter.
  • the spindle adapter 16 of the present invention is attached to the spindle 12 by the afore ⁇ mentioned bolts 82.
  • the spindle adapter is positioned concentrically with the central axis 20 of the spindle by engagement of the knob 34 on the spindle adapter into the bore 22 of the spindle.
  • the key 24 on the spindle is received in the keyway 36 in the spindle adapter for rotating the spindle adapter in response to rotation of the spindle.
  • the upper and lower surfaces 32,38 of the spindle adapter and the internal shoulder 58 of the stepped wall portion 50 are each perpendicular, or normal, to the central axis 20.
  • the cutting tool 14 is partially or loosely attached to the cutting tool adapter 18 by inserting the arbor screw 30 through the stepped bore 28 of the cutting tool and threading, but not tighten ⁇ ing, the screw into the threaded bore 66 of the cutting tool adapter. In this manner the cutting tool is free to rotate independently of the cutting tool adapter and the stepped cylindrical projection 64 of the cutting tool adapter is not “bottomed out” in the stepped bore 28 of the cutting tool.
  • the partially assembled cutting tool - cutting tool adapter is joined with the spindle adapter 16 by laterally inserting the stepped wall portion 76 of the cutting tool adapter through the first opening 52 in the stepped wall portion 50 of the spindle adap ⁇ ter and then simply sliding the unit into the cavity 56 so that the land 78 is resting on shoulder 58 and the stepped cylindrical projection 64 extends outwardly of the second opening 54.
  • the threaded bore 66 of the cutting tool adapter is automatically aligned with the center axis 20.
  • the bolts 86 are inserted through the laterally extending holes 70 in the cutting tool adapter and partially threaded into the threaded holes 48 in the spindle adapter.
  • a tool not shown, is inserted into the radially oriented bore 44 on the spindle adapter to prevent rotation of the spindle, and, while holding the spindle and spindle adapter stationary, the arbor screw is tightened, thereby drawing the land 78 into forcible contact with the shoulder 58 and drawing the cutting tool 14 up against the lower surface 38 of the spindle adapter, as shown in Fig. 3.
  • the bolts 86 are tightened into the threaded holes 48 thereby locking the cutting tool adapter to the spindle adapter.
  • the cutting tool 14 is detachably mount ⁇ ed onto the spindle 12 in an accurately aligned relation ⁇ ship with the center axis 20. Also, the cutting tool will rotate in a plane normal to the center axis since the tool . is drawn up and located against a surface normal to center axis, i.e., the lower surface 38 of the spindle adapter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

Systeme de mandrin (10) servant a fixer un outil de coupe (14) a une broche de machine (12) Le remplacement d'outils de coupe de grandes dimensions sur des machines de fraisage a broches multiples a represente, jusqu'a present, un travail couteux, ennuyeux et long, rendu plus difficile par l'emplacement souvent inaccessible des broches de fixation de l'outil sur une machine. Les problemes decrits ci-dessus sont resolus efficacement par un systeme de mandrin (10) possedant un organe d'ajustage (16) a la broche pouvant etre fixe sur une broche de machine (12) et un organe correspondant d'ajustage (18) d'outil de coupe pouvant etre fixe a l'outil de coupe (14). L'organe d'ajustage (18) d'outil de coupe peut etre separe lateralement de l'organe d'ajustage (16) de broche et il est particulierement utile dans des broches orientees verticalement sur des machines de fraisage a broches multiples.
PCT/US1980/000137 1980-02-11 1980-02-11 Systeme de mandrin WO1981002266A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1980/000137 WO1981002266A1 (fr) 1980-02-11 1980-02-11 Systeme de mandrin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOUS80/00137 1980-02-11
PCT/US1980/000137 WO1981002266A1 (fr) 1980-02-11 1980-02-11 Systeme de mandrin

Publications (1)

Publication Number Publication Date
WO1981002266A1 true WO1981002266A1 (fr) 1981-08-20

Family

ID=22154200

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1980/000137 WO1981002266A1 (fr) 1980-02-11 1980-02-11 Systeme de mandrin

Country Status (1)

Country Link
WO (1) WO1981002266A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299141A1 (fr) * 1987-04-15 1989-01-18 Axa-Entwicklungs- Und Maschinenbaugesellschaft Für Produktionstechnische Anlagen Und Geräte Mbh Machine-outil, poinçonneuse, ou pareille machine avec un dispositif de fixation d'outil pour changement automatique d'outil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US442828A (en) * 1890-12-16 Screw-cutting die
US2783527A (en) * 1953-03-26 1957-03-05 Davidson Archibald Tool holder
GB786456A (en) * 1955-06-13 1957-11-20 Eckold Walter Improvements in or relating to apparatus for clamping exchangeable tools
FR1198275A (fr) * 1957-09-13 1959-12-07 Porte-outil rotatif
US2967462A (en) * 1957-12-11 1961-01-10 Valeron Corp Milling machine adapter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US442828A (en) * 1890-12-16 Screw-cutting die
US2783527A (en) * 1953-03-26 1957-03-05 Davidson Archibald Tool holder
GB786456A (en) * 1955-06-13 1957-11-20 Eckold Walter Improvements in or relating to apparatus for clamping exchangeable tools
FR1198275A (fr) * 1957-09-13 1959-12-07 Porte-outil rotatif
US2967462A (en) * 1957-12-11 1961-01-10 Valeron Corp Milling machine adapter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299141A1 (fr) * 1987-04-15 1989-01-18 Axa-Entwicklungs- Und Maschinenbaugesellschaft Für Produktionstechnische Anlagen Und Geräte Mbh Machine-outil, poinçonneuse, ou pareille machine avec un dispositif de fixation d'outil pour changement automatique d'outil

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