US2464415A - Machine tool and more particularly to marking machine with a center - Google Patents

Machine tool and more particularly to marking machine with a center Download PDF

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Publication number
US2464415A
US2464415A US687920A US68792046A US2464415A US 2464415 A US2464415 A US 2464415A US 687920 A US687920 A US 687920A US 68792046 A US68792046 A US 68792046A US 2464415 A US2464415 A US 2464415A
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US
United States
Prior art keywords
tool
holder
frame
extension arm
carriage
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US687920A
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English (en)
Inventor
Philippe Maurice
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
A B G SA
G SA AB
ILE D ETUDE DES INV S ET PROCE
Original Assignee
G SA AB
ILE D ETUDE DES INV S ET PROCE
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 G SA AB, ILE D ETUDE DES INV S ET PROCE filed Critical G SA AB
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Publication of US2464415A publication Critical patent/US2464415A/en
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Expired - Lifetime legal-status Critical Current

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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
    • B23Q11/001—Arrangements compensating weight or flexion on parts of the machine
    • B23Q11/0017—Arrangements compensating weight or flexion on parts of the machine compensating the weight of vertically moving elements, e.g. by balancing liftable machine parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/91—Machine frame
    • Y10T408/92—Machine frame with counterweight mechanism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/309576—Machine frame
    • Y10T409/309744—Machine frame including means to compensate for deformation

Definitions

  • the present invention has for its main object to provide an improvement in machine-tools and in particular in marking machines with a center, which comprises a movable tool-holder on an extension arm supported in over-hanging position on the frame.
  • the invention aims at overcoming the drawbacks which arise from the elastic deformation tov which the extension arm is subject, however great the moment of inertia thereof may be, under the eifect of the weight of the tool-holders; such deformations are, besides, variable according to the position of the toolholders on the extension arm.
  • this invention is chiefly characterised by the novel application to such machines of means for, at least in part, compensating the bending moment exerted on the extension arm by the Weight of the tool-holder so as to relieve saidextension arm of the supporting function and make said arm serve solely the function of gvuilding the horizontal movements of the tool.
  • the means considered to be preferable according to this invention consists in balancing the weight of the tool-holder, at least in part, by an opposing force exerting no reaction upon the extension arm.
  • the pulleys are supported by a carriage movable on the independent support.
  • the independent support comprises a guide-way vfor guiding the movable carriage par- I allel to the extension arm.
  • the independent support is pivoted on the frame substantially at its center and its rear end rests upon an adjustable abutment.
  • This invention is applicable to all machinetools comprising a tool-holder movable upon an over-hanging extension arm. However, it is more particularly adapted to precision machines such as large capacity marking machines with a center. This invention then enables the providing of a new article of manufacture constituted by a marking machine with a center of large capacity, which is entirely clear of any upstanding standard on three of its sides, whereas known machines comprise a pair of standards between which .is mounted the support for the tool; it will be understood that this invention, the use of which eliminates any elastic deformation in the extension arm during the horizontal displacements of the tool-holder, and maintains for all positions of the latter a constant distance between the tool and the work-table of the machine, permits the manufacturer to do away with such standards.
  • the appending drawing represents by way of example only, and in diagrammatic showing, a form of embodiment of such a marking machine with a center.
  • the frame I is rested upon a base '2 and comprises at its upper portion an extension arm 3 having a pair of slide-ways 4 and 5 on which is reciprocable a slide-block 6 receiving the toolholder 7.
  • a horizontal girder '8 surmounts the frame I and the arm 3 said girder is pivoted at its center on a support 9 secured to the 1 frame by means of a horizontal pin in; the end thereof opposite to the extension arm rests upon an adjustable abutment formed by a supporting screw H, making it possible to adjust the horizontality of said girder, which has no point of contact with the extension arm on which the tool-holder slide-block 6 is horizontally movable.
  • a carriage I2 is displaceable through the medium of rollers 13 and I4 on the upper side of the girder 8 which thus constitutes a support and a runway for said carriage l2; the latter carries a pair of pulleys l5 and it over which is trained a cable I! fixed on one hand to the tool-holding head 1 and on the other hand to a balancing counter-weight l8 displaceable within the frame I.
  • a fixed counter-weight l9 produces on the pivotal axis l0 an opposing moment which at all times is greater than that set up by the tool-holder, even when the latter occupies its farthest position at the very end of the arm 3.
  • the slide-block 6 is made to drive the carriage 12 by any suitable means, such as a projection engaging a yoke 2i rigid with the carriage 1.
  • Projection 20 is preferably formed as a bushing freely rotatable on a pin rigid with 3 the carriage l2. Said yoke is so designed as to permit of a slight amount of relative vertical displacement in translation between said bushing and the arms of said yoke.
  • the girder 8 supports the tool-holding head 7 and the balancing counter-weight I8 thereof, without the arm 3 taking any part in said supporting action; the possible deformations which the girder 8 may be subject to under such load will be merely expressed as a vertical displacement of the counter-weight l8, with-out any additional stress being applied to the arm, the function of which is solely to guide the tool-holding slideblock 6 in the horizontal movement thereof.
  • the vertical displacement of the tool-holding head 1 is accomplished without any effort thanks to the balancing counter-weight l8.
  • a guiding device 24 integral with the carriage i2 prevents any oscillations which could arise from the effect of inertia during the reciprocation of said carriage.
  • the whole structure is so dimensioned and disposed that the resultant (RA for the foremost position A of the toolholder, RB for the rearmost position B of the tool-holder) of the various movable loads (slide-block 6, tool-holder 1, carriage l2, counter-weight I8) and the fixed loads (supporting girder 8 and counter-weight l9) applied to the frame I at all times remains within .the supporting polygon of the frame, even for the maximum displacements. In this way, the frame is made to work'in compression only; all bending stresses are eliminated, and thereby the relatively considerable deformations which could result therefrom.
  • a marking machine with a center making possible the machining of parts of large dimensions, while at the same time permitting of easy access for the operator.
  • the work-table is entirely clear of any upstandin support on three of its sides, whereas according to the conventional arrangement, large capacity marking machines with a center comprise a pair of standards between whichthe toolholder is mounted. The spacing between such standards defines a maximum dimension for the work-pieces which it is possible to machine on such machines. According to this invention, on.
  • reaction element for compensating the weight of the tool-holder could be other than a counter-weight; it could for instance be a support independent of the frame of the machine acting in the manner of a crane and arranged for example within said frame.
  • adjustable tension spring device fulfilling a function similar to that of the above-described counter-weight, or any other device capable of assuming the same compensating function.
  • Pulleys I5 and 16 with their cable ll could be replaced by any equivalent device, such as chain and sprockets or the like.
  • a marking machine a frame, an extension arm integral with said frame in overhangin position, a tool-holder, guiding means for guiding said tool-holder horizontally and vertically on saidextension arm, compensating means for at least partially compensating the load of said toolholder and said guiding means on said extension arm, a support independent of said extension arm and carried by said frame, and means connected with said tool-holder and With said compensating means for transferring to said support the stresses due to said load and to said compensating means.
  • a frame integral with said frame in overhanging po sition, a tool-holder, guiding means for guiding said tool-holder horizontally and vertically on said extension arm, compensating means for at least partially compensating the load of said toolholder and said guiding means on said extension arm, a support independent of said extension arm, a horizontal pivotable axis carried by said frame and by said independent support, adjusting means for adjusting the position of said independent support and thereby the parallelism of said support with said horizontal guiding means and means connected with said tool-holder for transferring to said support the stresses due to said load and to said compensating means.
  • a frame In a markin machine, a frame, a horizontal extension arm integral with said frame in over-hangin position, a tool-holder, guiding means for guiding said tool-holder horizontally and vertically on said extension arm, a support independent of said extension arm, a horizontal pivotable axis carried by said frame and said independent support, adjusting means for adjusting the parallelism of said independent support with said horizontal guiding means, means for compensating the load of said tool-holder and of the horizontally and vertically guiding means there-- of, and a carriage connected with said tool-holder and movable in translation on said independent support for supporting the stresses due to said load and to said compensating means.
  • a frame a horizontal extension arm integral with said frame in overhanging position, a tool-holder, guiding means for horizontally and vertically guiding said toolholder on said extension arm, a support independent of said extension arm, a horizontal pivotable axis carried by said frame and said independent support, adjusting means for adjusting the parallelism of said independent support with said horizontal guiding means, a carriage movable in translation on said independent support, friction rollers interposed between said carriage and said independent support, pulleys carried by said carriage, and a flexible cable trained over said pulleys and bearing at one of its ends said tool-holder and at its other end a compensating counterweight.
  • a frame integral with said frame in overhanging position, a tool-holder, a slide-block, horizontal slide-ways provided in said extension arm for the displacement of said slide-block, vertical slide-ways provided in said slide-block for the displacement of said tool-holder, a support independent of said extension arm, a horizontal pivotable axis carried by said frame and said independent support, adjusting means for adjusting the parallelism of said independent support with said horizontal slideways, a carriage movable in translation on said independent support, friction rollers interposed between said carriage and said independent support, pulleys carried by said carriage, a flexible cable trained over said pulleys and bearing at one of its ends said tool-holder and at its other end a compensating counter-weight, a vertical slideway integral with said carriage for guiding said counter-weight, a projection integral with said carriage and a yoke integral with said slide-block adapted to engage said extension.
  • a frame a horizontal extension arm integral with said frame in over-hanging position, a tool-holder, a slide-block, horizontal slide-ways provided in said extension arm for the displacement of said slide-block, vertical slide-ways provided in said slide-block for the displacement of said tool-holder, a support independent of said extension arm, a horizontal pivotable axis carried by said frame and said independent support, adjusting means for adjusting the parallelism of said independent support with said horizontal slide-ways, a carriage movable in translation on said independent support, friction rollers interposed between said carriage and said independent support, pulleys carried by said carriage, a flexible cable trained over said pulleys and bearing at one of its ends said tool-holder and at its other end a compensating counter-weight, a vertical slide-way integral with said carriage for guiding said counterweight, a projection integral with said carriage and a yok

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)
  • Turning (AREA)
US687920A 1943-10-18 1946-08-02 Machine tool and more particularly to marking machine with a center Expired - Lifetime US2464415A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR984957T 1943-10-18

Publications (1)

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US2464415A true US2464415A (en) 1949-03-15

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US687920A Expired - Lifetime US2464415A (en) 1943-10-18 1946-08-02 Machine tool and more particularly to marking machine with a center

Country Status (4)

Country Link
US (1) US2464415A (fr)
CH (1) CH258063A (fr)
FR (1) FR984957A (fr)
GB (1) GB625433A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696763A (en) * 1950-12-15 1954-12-14 Giddings & Lewis Counterbalancing mechanism for machine tools
US2793570A (en) * 1952-08-04 1957-05-28 Machines Outils Et D Outil Pro Device for taking up the play of a machine member movable in slideways and subject to variable stresses
US2816487A (en) * 1948-09-16 1957-12-17 Kearney & Trecker Corp Milling machine
US2868084A (en) * 1954-08-17 1959-01-13 Gray & Co G A Counterbalanced cap for arbor supports
US2899869A (en) * 1955-09-02 1959-08-18 Suspension mechanism for machine tools
US2912905A (en) * 1952-05-16 1959-11-17 Const De Machines Outils Et D Bracing device for overhanging machine member
US3168000A (en) * 1962-04-05 1965-02-02 Derefa Ets Balance compensating devices
US3683744A (en) * 1970-02-06 1972-08-15 Werkzeug Mas Fab Adolf Waldric Device for compensating the head weight on portal or cantilever type machine tools
US20080236359A1 (en) * 2007-04-02 2008-10-02 Shu-Yen Hsieh Machine tool having a c-shaped frame
CN109590800A (zh) * 2018-11-28 2019-04-09 大连理工大学 一种新型配重平衡系统及使用方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE941450C (de) * 1951-04-11 1956-04-12 F A M A Fabbrica Apparecchi Ma Vorrichtung zum Einstellen der Schnittstaerke an Horizontalgattern
DE1017437B (de) * 1953-05-07 1957-10-10 Ruhrstahl Ag Lagerarm fuer Bohrspindeln von Bohrmaschinen, insbesondere Gelenkspindel-Bohrmaschinen
US2949797A (en) * 1958-12-31 1960-08-23 Pratt & Whitney Co Inc Cutter head and counterweight support for machine tools
DE1237403B (de) * 1959-06-03 1967-03-23 Schiess Ag Gewichtsausgleichsvorrichtung fuer ein Horizontalbohr- und Fraeswerk
JPS5354498U (fr) * 1976-10-12 1978-05-10
FR2494615A1 (fr) * 1980-11-24 1982-05-28 Line Sa Dispositif d'equilibrage d'une tete d'usinage se deplacant sur une traverse de fraiseuse a un seul montant

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB397062A (en) * 1932-09-17 1933-08-17 Genevoise Instr Physique Improvements in and relating to drilling, boring, milling, and like machine tools

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB397062A (en) * 1932-09-17 1933-08-17 Genevoise Instr Physique Improvements in and relating to drilling, boring, milling, and like machine tools

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816487A (en) * 1948-09-16 1957-12-17 Kearney & Trecker Corp Milling machine
US2696763A (en) * 1950-12-15 1954-12-14 Giddings & Lewis Counterbalancing mechanism for machine tools
US2912905A (en) * 1952-05-16 1959-11-17 Const De Machines Outils Et D Bracing device for overhanging machine member
US2793570A (en) * 1952-08-04 1957-05-28 Machines Outils Et D Outil Pro Device for taking up the play of a machine member movable in slideways and subject to variable stresses
US2868084A (en) * 1954-08-17 1959-01-13 Gray & Co G A Counterbalanced cap for arbor supports
US2899869A (en) * 1955-09-02 1959-08-18 Suspension mechanism for machine tools
US3168000A (en) * 1962-04-05 1965-02-02 Derefa Ets Balance compensating devices
US3683744A (en) * 1970-02-06 1972-08-15 Werkzeug Mas Fab Adolf Waldric Device for compensating the head weight on portal or cantilever type machine tools
US20080236359A1 (en) * 2007-04-02 2008-10-02 Shu-Yen Hsieh Machine tool having a c-shaped frame
US7441994B2 (en) * 2007-04-02 2008-10-28 Shu-Yen Hsieh Machine tool having a C-shaped frame
CN109590800A (zh) * 2018-11-28 2019-04-09 大连理工大学 一种新型配重平衡系统及使用方法

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Publication number Publication date
GB625433A (en) 1949-06-28
CH258063A (fr) 1948-11-15
FR984957A (fr) 1951-07-12

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