US3296901A - Machine tools - Google Patents

Machine tools Download PDF

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Publication number
US3296901A
US3296901A US367164A US36716464A US3296901A US 3296901 A US3296901 A US 3296901A US 367164 A US367164 A US 367164A US 36716464 A US36716464 A US 36716464A US 3296901 A US3296901 A US 3296901A
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US
United States
Prior art keywords
girder
bending
transversal
connecting means
columns
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
US367164A
Other languages
English (en)
Inventor
Sawada Kiyoshi
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.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co Ltd
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 Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Application granted granted Critical
Publication of US3296901A publication Critical patent/US3296901A/en
Anticipated expiration legal-status Critical
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
    • B23Q11/0014—Arrangements compensating weight or flexion on parts of the machine using static reinforcing elements, e.g. pre-stressed ties
    • 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
    • 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
    • Y10T409/30784—Milling including means to adustably position cutter
    • Y10T409/307952—Linear adjustment
    • Y10T409/308288—Linear adjustment including gantry-type cutter-carrier
    • 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
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • 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
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • Y10T82/2511—Vertical

Definitions

  • Further object of this invention is to provide an improved machine tool such as a vertical lathe wherein bending of the transversal girder thereof can be compensated by simple means.
  • a beam is provided along the girder and one or more means are interposed between a beam and the transversal girder to vary the degree of compensation to bending, said transversal girder being in parallel with said beam.
  • FIG. 1 shows a front elevation of a vertical lathe embodying this invention
  • FIG. 2 shows a side view of the lathe shown in FIG. 1;
  • FIG. 3 is a graph showing comparison between the amounts of bending of transversal girder of the prior art and that of this invention
  • FIG. 4 shows a front elevation of a modification of this invention
  • FIG. 5 is a graph showing the comparison between the amount of bending of the transversal girder of the modified lathe shown in FIG. 4 and that of the prior art;
  • FIG. 6 shows a cross-sectional view of the transversal girder of another modification of this invention.
  • FIGURE 7 shows a perspective view of the connecting means.
  • FIGS. 1 and 2 of the accompanying drawings there is shown a vertical lathe comprising a pair of spaced apart columns 2 and 3 secured on a base 1, a transversal or horizontal girder 4 with its opposite ends supported by the columns and tool posts 7 which are guided to move along the transversal girder 4 and carry holders 6 for cutting tools 5 at their lower ends.
  • the tool posts 7 are fed by a lead screw 8.
  • a turn table 10 In a recess of the base 1 between the columns 2 and 3 is mounted a turn table 10 adapted to support a work 11 to be turned.
  • a beam 12 is provided above and along the transversal girder 4 which is in parallel thereto.
  • the girder and the beam are interconnected by suitable connecting means such as pedestals 17, 18 and 19 having the same heights and replacable spacers or shims 14, 15 and 16.
  • the shim 16 is made thinner than the others i.e., shims 14 and 15 at the opposite ends, said shim 16 being removably attached to the upper surface of the pedestal 19 by means of setting bolts (not shown), which respectively rigidly fix the beam 12 through each of holes 36 and 37 of the pedestal 1-9 and the shim 16,-and the other setting bolts rigidly fix the girder 4 through holes 35 of the pedestal 19.
  • the central portion of the transversal girder 4 is connected to the beam 12 by a connecting means having shorter length than those located at the opposite ends the central portion of the girder will be pulled upwardly.
  • a connecting means having shorter length than those located at the opposite ends the central portion of the girder will be pulled upwardly.
  • the amount of bending of the transversal girder is shown in FIG. 3 wherein the abscissa indicates the distance along the girder and the ordinate indicates the amount of bending.
  • curve A represents the amount of bending of the prior girder which is merely mounted upon the columns 2 and 3
  • curve B that of the prior girder which is securely supported by columns 2 and 3
  • curve C represents the amount of bending of the girder embodying this invention.
  • the amount of bending of the girder embodying this invention is far smaller than those of the prior art.
  • FIG. 4 shows a modified embodiment of this invention wherein a transversal girder 4 carrying tool posts 7 is supported by a pair of spaced columns 2 and 3 mounted upon a turn table 10' and a hollow or annular work 11 is supported outside of the turn table 10.
  • a beam 12 is disposed above and along the transversal girder 4 and these members are connected together by connecting means 23, 24 and 25 including replaceable shims 20-, 21 and 22, assembled with the corresponding pedestals, it being understood that the thickness of the central shim 22 is made smaller than that of the outer shims 20 and 21 to provide a similar function as described above.
  • a screw means 26 is vertically arranged between the under surface of the beam and the upper surface of the girder. Said screw means 26 has a bolt rigidly mounted on the upper surface of the girder and a nut. When the nut is threaded on the bolt to be pushed toward the under surface of the beam, compression stress occurs in the vertical direction between the beam and the girder to vary the degree of compensation to bending.
  • FIG. 5 shows the amount of bending of the horizontal girder of the lathe shown in FIG. 5 wherein the abscissa indicates the distance along the girder and the ordinate the amount of bending.
  • Curve C represents the amount of bending of the girder embodying this invention as compared to that of the prior art indicated by the curve D which shows that the amount of bending is greatly reduced by the novel connecting means of this invention.
  • the transverse girder 30 may be formed so as to have a rectangular hollow cross section to house a beam 31.
  • a connecting means 32 such as a screw is provided at the center of the girder span, said girder being supported at its opposite ends on columns (not shown). By the adjustment of the screw, the degree of compensation to vertical bending may be varied.
  • Other setting screws 33 and 34 shown in FIG- URE 6 are provided at opposite sides of the girder at suitable positions in its longitudinal direction.
  • transversal girder can be effectively compensated or prevented by connecting a transversal girder to a horizontal beam through one or more adjustable connecting means whereby to move a tool and the like along a substantially horizontally plane. Moreover even when the compensation is effected by mean temperature variation due to seasonal circumstances or aging of the material, it can be easily and accurately corrected.
  • a machine tool comprising a horizontal girder supported at its opposite ends, on columns spaced-apart, a beam extending along said girder and connecting means interconnecting said beam and said girder, a plurality of said connecting means being made thinner than the remaining connecting means and made variable in height to vary the degree of the compensation for the bending of said girder.
  • a machine tool according to claim 1 in which said horizontal girder includes a part which extends with a part of said beam from one of its positions supported by said columns.
  • each of said connecting means comprises a shim connected with a pedestal with setting bolts.
  • each of said connecting means comprises a shim connected with a pedestal with setting bolts.
  • a machine tool according to claim 2 in which said connecting means consists of a bolt and a nut.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Machine Tool Units (AREA)
US367164A 1963-05-14 1964-05-13 Machine tools Expired - Lifetime US3296901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2404263 1963-05-14

Publications (1)

Publication Number Publication Date
US3296901A true US3296901A (en) 1967-01-10

Family

ID=12127418

Family Applications (1)

Application Number Title Priority Date Filing Date
US367164A Expired - Lifetime US3296901A (en) 1963-05-14 1964-05-13 Machine tools

Country Status (3)

Country Link
US (1) US3296901A (de)
DE (2) DE6603630U (de)
GB (1) GB1063453A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229866A (en) * 1978-01-31 1980-10-28 Pierre Berthier Frame support for tool head
FR2483289A1 (fr) * 1980-05-27 1981-12-04 Moulin Georges Systeme de chariot coulissant sous table
US5183374A (en) * 1989-09-27 1993-02-02 Helis Horizontal broach with a mobile standard
EP4163585A1 (de) * 2021-10-05 2023-04-12 Renishaw PLC Träger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912905A (en) * 1952-05-16 1959-11-17 Const De Machines Outils Et D Bracing device for overhanging machine member
FR1315481A (fr) * 1961-02-24 1963-01-18 Schiess Ag Machine-outil à deux montants du type à portique comportant un ou plusieurs chariots à déplacement horizontal sur la traverse
GB938947A (en) * 1961-02-24 1963-10-09 Schiess Ag Two-column portal-type machine tool with one or more tool posts horizonally slidablealong a cross member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912905A (en) * 1952-05-16 1959-11-17 Const De Machines Outils Et D Bracing device for overhanging machine member
FR1315481A (fr) * 1961-02-24 1963-01-18 Schiess Ag Machine-outil à deux montants du type à portique comportant un ou plusieurs chariots à déplacement horizontal sur la traverse
GB938947A (en) * 1961-02-24 1963-10-09 Schiess Ag Two-column portal-type machine tool with one or more tool posts horizonally slidablealong a cross member

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229866A (en) * 1978-01-31 1980-10-28 Pierre Berthier Frame support for tool head
FR2483289A1 (fr) * 1980-05-27 1981-12-04 Moulin Georges Systeme de chariot coulissant sous table
US5183374A (en) * 1989-09-27 1993-02-02 Helis Horizontal broach with a mobile standard
EP4163585A1 (de) * 2021-10-05 2023-04-12 Renishaw PLC Träger
WO2023057745A1 (en) * 2021-10-05 2023-04-13 Renishaw Plc Support

Also Published As

Publication number Publication date
DE6603630U (de) 1969-10-23
DE1477793A1 (de) 1969-08-07
GB1063453A (en) 1967-03-30

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