WO1998051443A1 - Machine pour usinage par enlevement de copeaux de pieces oblongues - Google Patents

Machine pour usinage par enlevement de copeaux de pieces oblongues Download PDF

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Publication number
WO1998051443A1
WO1998051443A1 PCT/CH1997/000178 CH9700178W WO9851443A1 WO 1998051443 A1 WO1998051443 A1 WO 1998051443A1 CH 9700178 W CH9700178 W CH 9700178W WO 9851443 A1 WO9851443 A1 WO 9851443A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
machine
tool spindle
tool
rotation
Prior art date
Application number
PCT/CH1997/000178
Other languages
German (de)
English (en)
Inventor
Ralph Liechti
Fritz Lehmann
Original Assignee
Liechti Engineering Ag
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 Liechti Engineering Ag filed Critical Liechti Engineering Ag
Priority to AU26301/97A priority Critical patent/AU2630197A/en
Priority to PCT/CH1997/000178 priority patent/WO1998051443A1/fr
Publication of WO1998051443A1 publication Critical patent/WO1998051443A1/fr

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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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
    • B23Q1/5468—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed parallelly by a single rotating pair
    • B23Q1/5481—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed parallelly by a single rotating pair followed parallelly by a single rotating pair

Definitions

  • the invention relates to a machine for machining elongated workpieces with at least one clamping device for a workpiece which can be driven about a first axis of rotation and at least one tool spindle which can be driven about a second axis of rotation lying in the tool axis and which runs along a first translation axis parallel to the first axis of rotation and is displaceable along a second translation axis perpendicular to the first axis of rotation and parallel to the second axis of rotation, the clamping device being displaceable along a third translation axis perpendicular to the first and second translation axes and the tool spindle being pivotable about a pivot axis parallel to the third translation axis.
  • Numerically controlled machining centers are almost exclusively used today for machining workpieces with complex shaped surfaces, such as turbine blades.
  • the design of such machining centers is based on the idea of enabling the complete machining of different and complicated workpieces in a single clamping.
  • the centers have at least three translational movement axes with a numerical path control, which are usually supplemented by one or two likewise numerically controlled rotation axes.
  • the way in which these axes of motion are assigned to the tool or workpiece determines the design of the machining center, in particular the structure and mutual arrangement of the various stand and table assemblies.
  • the range of parts to be manufactured determines the technical parameters of a machining center, such as the type and number of controlled axes, cutting performance, speed and feed range, and length of travel.
  • Efforts to reduce the manufacturing costs of machining workpieces of the type mentioned above are essentially two-way. First, one tries to reduce the acquisition and operating costs of the corresponding machining centers by building them Simplified as possible and - if this is also associated with a simplification - adapts to the workpieces to be machined with it.
  • Machine called "six-axis tool device” has become known, which has two spaced platforms, one of which can carry a tool and the other a workpiece.
  • the two platforms are connected to one another by six elements variable in length, for example hydraulic cylinders or threaded spindles, and can be moved relative to one another. By changing the length of the elements in a controlled manner, one of the platforms can be moved spatially in any area in relation to the other.
  • the document WO 92/17313 entitled “Manipulator” shows a similar machine, in which, however, two platforms, one of which can carry a workpiece, are immovably connected to one another.
  • the six variable-length elements in this case carry the tool and are mounted on the other of the platforms mentioned. By controlling the length of the elements in a controlled manner, the tool can be moved anywhere in an area.
  • a disadvantage of the first of the machines mentioned is that a relatively large mass has to be accelerated with the movable platform, as a result of which the working speed of this machine is limited.
  • Both of the machines mentioned have in common that they have at least six controlled drives and just as many guides for carrying out the relative movements between the tool and the workpiece, which is not only very complex and expensive, but also difficult to manage in terms of control technology.
  • a first object of the present invention is to provide a machine for machining elongated workpieces which has a structure which is considerably simplified compared to known machines of this type.
  • a second aim is to make such a machine modular so that, in particular, its frame can be assembled easily and quickly according to the required size.
  • Another object of the invention is to propose a machine of the type mentioned at the outset, in which the moving masses are small compared to the prior art.
  • the machine according to the invention enables all movements of the tool spindle in a plane determined by the first and second translation axes and the pivoting movement of the tool spindle with a single guide, it is simpler, smaller, lighter and less expensive than machines of the prior art with comparable ones Tasks.
  • the simplicity of the structural design favors the design of the machine in a modular design.
  • the relatively small moving masses result in improved dynamics of the machine according to the invention compared to known machines.
  • FIG. 1 shows a front view of an embodiment of the machine according to the invention
  • Figure 2 is a side view of the machine shown in Figure 1 and
  • FIGS. 3 and 4 schematic diagrams to illustrate the kinematics of the machine according to the invention
  • the milling machine shown in FIGS. 1 and 2 is specially designed for producing turbine blades and contains a machine bed 1 on which an upper support 3 is held by means of supports 2. On the side of this carrier 3 facing the machine bed 1 there is a guide 4 which extends in the direction of the first translation axis X and on which three carriages 5, 6 and 7 are displaceably mounted independently of one another. Each carriage is equipped with a drive, not shown, which moves the carriage along the guide 4 in a controlled manner.
  • the two outer carriages 5 and 7 each contain a joint 8 or 9, with which an arm 10 or 11 is connected.
  • Each of the two arms 10 and 11 is connected at its other end by means of a further joint 12 or 13 to a milling unit 14, which includes the tool spindle 15 receiving a tool, for example a milling tool 16, together with its drive.
  • the middle slide 6 is rigidly connected to a guide 17 extending in the direction of the second translation axis Z.
  • an axis 18 is displaceable in the direction of the second translation axis Z, which axis 18 intersects the tool spindle 15 at right angles above the two further joints 12 and 13 and protrudes on both sides beyond the milling unit 14, as can be seen in FIG. 2.
  • a table 19 is slidably received on a guide 20 in the direction of the third translation axis Y.
  • This table carries a clamping device 21 with which a workpiece 22 is held rotatably about a first axis of rotation A.
  • a tailstock 23 which can be moved on the table 19 in the direction of the first translation axis X.
  • FIG. 3 shows how the tool 16 is moved by the amount z16 in the direction of the second translation axis Z from a starting position shown with solid lines to an end position shown with broken lines.
  • a movement of the tool in the direction of the first translation axis X is achieved in that all three slides 5, 6 and 7 are shifted in the same direction by the same amount.
  • the axis of the tool spindle starts from a vertical position about the axis B shown with solid lines, executes a pivoting movement by the angle ⁇ into a position shown with broken lines.
  • the position of the swivel axis can be selected as desired within a certain range by corresponding control of the displacement paths x'5, x'6 and x'7.
  • the position of the pivot axis B is selected such that it lies close to the point of contact of the milling tool 16 on the workpiece 22. This choice has the advantage that the point of contact remains undisturbed when swiveling the tool, so that only minimal linear corrections have to be made. This saves unnecessarily long readjustments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)

Abstract

L'invention concerne une machine qui comporte au moins un dispositif de serrage (21) pouvant être entraîné autour d'un premier axe de rotation (A) pour une pièce et au moins un arbre pour outils (15) pouvant être entraîné autour d'un second axe de rotation (C). Ledit arbre pour outils peut être déplacé le long d'un axe X et d'un axe Z et peut également pivoter dans une zone. Trois chariots (5, 6, 7) peuvent coulisser indépendamment les uns des autres sur un guide (4). Le chariot médian (6) porte un guide (17) s'étendant dans le sens de l'axe Z, guide le long duquel une unité (14) portant l'arbre pour outils peut être déplacée. Les deux autres chariots (5, 7) sont articulés par des bras (10, 11) au niveau de l'unité (14) qui porte l'arbre pour outils. Comparativement aux machines connues du même type, cette machine comporte un nombre réduit de mécanismes d'entraînement et notamment de guides et peut aisément présenter une structure modulaire. En outre, avec ce type de machines, comparativement à l'état antérieur de la technique, les masses déplacées sont minimes, ce qui améliore la dynamique de ladite machine.
PCT/CH1997/000178 1997-05-09 1997-05-09 Machine pour usinage par enlevement de copeaux de pieces oblongues WO1998051443A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU26301/97A AU2630197A (en) 1997-05-09 1997-05-09 Machine for machining down oblong work pieces
PCT/CH1997/000178 WO1998051443A1 (fr) 1997-05-09 1997-05-09 Machine pour usinage par enlevement de copeaux de pieces oblongues

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1997/000178 WO1998051443A1 (fr) 1997-05-09 1997-05-09 Machine pour usinage par enlevement de copeaux de pieces oblongues

Publications (1)

Publication Number Publication Date
WO1998051443A1 true WO1998051443A1 (fr) 1998-11-19

Family

ID=4550873

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1997/000178 WO1998051443A1 (fr) 1997-05-09 1997-05-09 Machine pour usinage par enlevement de copeaux de pieces oblongues

Country Status (2)

Country Link
AU (1) AU2630197A (fr)
WO (1) WO1998051443A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410292B (de) * 1999-01-25 2003-03-25 Ernst Krause & Co Werkzeugmaschine mit stabkinematischer positionierung von werkzeugen und bzw. oder werkstücken
CZ299124B6 (cs) * 2001-06-18 2008-04-30 Kovosvit Mas A.S. Paralelní polohovací mechanismus, zvlášte pro obrábení a/nebo manipulaci a/nebo merení

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571289A1 (fr) * 1984-10-08 1986-04-11 Forest Line Sa Dispositif d'orientation pour outil
WO1991003145A1 (fr) * 1989-09-01 1991-03-21 Kearney & Trecker Corporation Machine-outil a six axes
US5378282A (en) * 1993-06-28 1995-01-03 Pollard; Willard L. Robotic tool manipulating apparatus
DE19525482A1 (de) * 1995-07-13 1997-01-16 Bernold Richerzhagen Vorrichtung zur Verschiebung und Positionierung eines Objektes in einer Ebene

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571289A1 (fr) * 1984-10-08 1986-04-11 Forest Line Sa Dispositif d'orientation pour outil
WO1991003145A1 (fr) * 1989-09-01 1991-03-21 Kearney & Trecker Corporation Machine-outil a six axes
US5378282A (en) * 1993-06-28 1995-01-03 Pollard; Willard L. Robotic tool manipulating apparatus
DE19525482A1 (de) * 1995-07-13 1997-01-16 Bernold Richerzhagen Vorrichtung zur Verschiebung und Positionierung eines Objektes in einer Ebene

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410292B (de) * 1999-01-25 2003-03-25 Ernst Krause & Co Werkzeugmaschine mit stabkinematischer positionierung von werkzeugen und bzw. oder werkstücken
CZ299124B6 (cs) * 2001-06-18 2008-04-30 Kovosvit Mas A.S. Paralelní polohovací mechanismus, zvlášte pro obrábení a/nebo manipulaci a/nebo merení

Also Published As

Publication number Publication date
AU2630197A (en) 1998-12-08

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