WO2008092504A1 - Procédé de positionnement et/ou de fixation de pièces à usiner et dispositif correspondant - Google Patents

Procédé de positionnement et/ou de fixation de pièces à usiner et dispositif correspondant Download PDF

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Publication number
WO2008092504A1
WO2008092504A1 PCT/EP2007/050954 EP2007050954W WO2008092504A1 WO 2008092504 A1 WO2008092504 A1 WO 2008092504A1 EP 2007050954 W EP2007050954 W EP 2007050954W WO 2008092504 A1 WO2008092504 A1 WO 2008092504A1
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WO
WIPO (PCT)
Prior art keywords
adjustment
deformation body
machined
deformation
workpiece
Prior art date
Application number
PCT/EP2007/050954
Other languages
German (de)
English (en)
Inventor
Thomas Josi
Original Assignee
Kocher Ag, Orpund
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 Kocher Ag, Orpund filed Critical Kocher Ag, Orpund
Priority to PCT/EP2007/050954 priority Critical patent/WO2008092504A1/fr
Publication of WO2008092504A1 publication Critical patent/WO2008092504A1/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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
    • 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
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/34—Relative movement obtained by use of deformable elements, e.g. piezoelectric, magnetostrictive, elastic or thermally-dilatable elements
    • 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
    • B23Q1/56—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/60—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/62—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides
    • B23Q1/621—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides a single sliding pair followed perpendicularly by a single sliding pair

Definitions

  • This invention relates to a method of positioning and / or securing workpieces to be machined, and to a corresponding device.
  • this invention relates to a method for positioning and / or attachment of workpieces to be machined, and the corresponding apparatus in which the workpiece to be machined is placed and positioned on a workpiece support, and the workpiece support by means of a first adjustment in a first adjustment direction, and is adjusted by means of a second adjustment in a second, at right angles to the first adjustment direction adjustment.
  • these conventional processing devices basically comprise one or more linear guides, which serve to limit these translational movements to exactly one degree of freedom.
  • linear guides a distinction is then made between the linear sliding guides (which comprise a plurality of mutually displaceable guide elements) on the one hand, and linear rolling guides (in which rolling elements are circulated between two moving guide elements) on the other hand.
  • dovetail guides are especially used.
  • the object of the present invention is therefore to propose a method for positioning and / or fastening of workpieces to be machined and a corresponding device, which do not have the above-mentioned disadvantages of the prior art.
  • the object of the present invention to provide a method for positioning and / or attachment of workpieces to be machined and a corresponding device, which allow a particularly accurate positioning and / or attachment even with the smallest workpieces.
  • the objects of the invention are achieved in that in the method for positioning and / or attachment of workpieces to be machined, in which the workpiece to be machined is placed on a workpiece support, and in which the workpiece support by means of a first adjustment in a first adjustment , Is adjusted by means of a second adjustment in a second, perpendicular to the first adjustment direction adjustment, by means of at least one pushing force on at least one surface of the deformation body of the first adjustment and / or the second adjustment is applied, and the deformation body due to applied force is deformed, wherein the workpiece support is adjusted in the first adjustment direction and / or in the second adjustment direction.
  • This invention has the particular advantage that the adjustment of the workpiece support, and thus the adjustment of the workpiece to be machined thanks to the deformation of the deformation body can be realized.
  • the jerk problem is solved, which arises due to the static friction and sliding friction between two bodies.
  • this invention has the advantage that the workpiece is not first positioned and then fixed, but that these two activities can be handled by a single action. As a result, not only is time gained, but precision inaccuracies resulting from the fastening process can be eliminated very easily and reliably.
  • the length and / or the shape of the deformation body are changed due to the applied force.
  • the advantage of this embodiment is in particular that the positioning of the workpiece can be realized by changing the length or the shape of the deformation element.
  • the deformation can be predicted accurately with a large number of bodies, so that a particularly accurate prediction and planning of the necessary adjustment are made possible. Also, both the positioning accuracy and the operating speed can be significantly improved.
  • force is applied to the at least one surface of the deformation body by means of a clamping screw.
  • the advantage of this embodiment is, inter alia, that the change in the force acting on the deformation body can be controlled and metered by tightening or loosening the clamping screw.
  • the tightening screw also has the advantage that no additional locking means are necessary to maintain the desired position (or desired applied force) over a longer period of time.
  • the adjustment of the workpiece support in the first adjustment direction and / or in the second adjustment direction is controlled by means of an optical and / or electronic measuring device.
  • the deformation body is formed of a metal and / or other elastic material.
  • the advantage of this embodiment is in particular that many metals, but also, for example, alloys of metals and certain other materials due to their elasticity properties for a controlled and predictable deformation and thus for a very precise positioning and / or attachment of the workpiece to be machined especially well suited.
  • the present invention also relates to a corresponding device for positioning and / or fastening workpieces to be machined.
  • a third adjustment device is provided.
  • tion and / or a fourth adjustment device by means of which in each case the first adjustment in the first adjustment and / or the second adjustment in the second adjustment are roughly adjustable.
  • these can be conventional linear sliding guides, such as a dovetail guide, for example.
  • This embodiment has the particular advantage that the coarse adjustment (ie in the range of a few millimeters) can be carried out by conventional methods. Only the fine adjustment (ie in the range of a few micrometers) must then be carried out by the above-described deformation of the deformation body. This is particularly advantageous when a very large adjustment in one or more directions is necessary (for example, between two completely different workpieces). Not only is such an adjustment by the deformation of the deformation body very tedious, but thereby the deformation body is also claimed unnecessarily, which could lead to the medium-term loss of its elastic properties.
  • each of the deformation bodies is formed substantially cuboid.
  • the advantage of this embodiment is, inter alia, that a cuboid deformation body can be assembled more easily with the other components of the device. Also, the deformation of the cuboid body is predictable to a large extent, so that an optimal operation can be achieved.
  • each case has a cavity.
  • This embodiment has the particular advantage that the deformation properties of the deformation body can be more accurately predicted and controlled by the particular choice of the cavity. This can be achieved, for example, that the deformation is adapted exactly to the specific needs. As a result, an even more accurate, faster and simpler positioning and / or fastening of the workpiece to be machined can be ensured.
  • the clamping screw can be actuated by hand and / or by means of an actuating unit.
  • the advantage of this embodiment is, inter alia, that the control over the movements of the clamping screw can take place very precisely. As a result, of course, the accuracy of the positioning / attachment of the workpiece to be machined is improved.
  • An actuatable by means of an actuator clamping screw also has the advantage that even a remote control of the device according to this embodiment of the invention is easily possible.
  • FIG. 1 shows a perspective view of a device for
  • FIG. 2 shows a planar side view of the device for positioning and / or fastening of workpieces to be machined according to an embodiment of the present invention from FIG. 1.
  • FIGS. 3a and 3b schematically show the sequence of the method for positioning and / or fastening of workpieces to be machined in a device according to an embodiment of the present invention:
  • FIG. 3a shows an adjusting device in the rest position;
  • Figure 3b shows the same direction of adjustment in one position after force has been applied.
  • Figure 4 shows a perspective view of a device for positioning and / or attachment of workpieces to be machined according to another embodiment of the present invention.
  • Figure 1 illustrates a device for positioning and / or attachment of workpieces to be machined according to an embodiment of the present invention.
  • reference numeral 10 refers to a first adjusting device
  • reference numeral 20 to a second adjusting device
  • reference numeral 30 to a workpiece support.
  • This workpiece support 30 basically fulfills two functions: On the one hand, it serves to correctly position and fix the workpiece to be machined in the machining position, and on the other hand, the workpiece support 30 subsequently supports the workpiece during machining. Since a very high precision is required when machining very small workpieces, both the positioning and the attachment must be carried out with particular care.
  • the workpiece support 30 is connected to the first adjustment device 10 in such a manner that the movements of the adjustment device 10 in the first adjustment direction X (represented by an arrow in FIG. 1) are transferred to the workpiece support 30.
  • the workpiece support 30 (and thereby also the workpiece supported thereon) can be adjusted as required in the adjustment direction X.
  • the first adjusting device 10 is connected to the second adjusting device 20 such that an adjustment of the first adjusting device 10 in the second adjusting direction Y is possible by means of the second adjusting direction 20. Since the workpiece support 30 is connected to the first adjustment device 10, consequently, the workpiece support 30 and the workpiece supported thereon can also be adjusted in the adjustment direction Y.
  • the reference numeral 40 refers to a
  • This frame can for example be made of the same material as the other components of the device, but also of any other suitable material.
  • the reference numerals 50 and 60 each refer to a third adjusting device and a fourth adjusting device. The construction and the function of these two adjusting devices will be explained in detail below with reference to FIG. Figure 2 illustrates by a planar side view somewhat closer to the structure of the device for positioning and / or attachment of workpieces to be machined from Figure 1.
  • the reference numbers of Figure 1 are also used in Figure 2 to denote the same elements.
  • reference numeral 10 refers to the first and reference numeral 20 to the second adjusting device.
  • the reference numeral 30 designates the workpiece support 30, and the reference numeral 40 the frame of the device.
  • the workpiece support 30 includes a workpiece holder 31.
  • This workpiece holder 31 may have a special geometry, which makes it advantageous for the machining of a certain type or a certain type of workpieces.
  • this workpiece holder 31 in cross section have a semicircular or an oval cavity, which are suitable, for example, in particular for processing micro and ultra-drills and similar workpieces.
  • the workpiece holder 31 may also have a rectangular cross-section, which is well suited for other types of tools.
  • a suitable insert can be used, so that the workpiece can always enjoy optimal support during processing.
  • the tool rest 30 also includes a support arm 35, which mainly serves to support the above-mentioned workpiece holder 31.
  • the workpiece support 30 is further connected to the first adjustment device 10 by the support arm 35.
  • the first adjusting device 10 basically consists of a deformation body 15 and a corresponding pushing device 16.
  • the first adjusting device 10 can be designed, for example, such that a direct contact can be established between the deformation body 15 and the pushing device 16.
  • the solution in which the deformation body 15 and the pushing device 16 are not in direct contact with each other, but connected via one or more intermediate elements, is quite conceivable.
  • the pushing device 16 By means of the pushing device 16, a certain force can be exerted on at least one surface of the deformation body 15. As a result of this force, the deformation body 15 can be deformed, that the workpiece support 30 can be adjusted in the first adjustment direction X due to this deformation.
  • the pushing device 16 consists of a tightening screw with a screw body 17 and a corresponding screw nut 18.
  • a compressive force is transmitted by the screw body 17 to the deformation body 15.
  • this force occurs in the deformation body 15 to a deformation which, inter alia, depends decisively on the applied force.
  • an adjustment of the position of the deformation body 15 in the adjustment direction X with respect to the other elements of the first adjustment device 10 is created.
  • the adjustment device 10 is also directly adjusted by means of the adjustment device 10 Supporting arms 35 associated workpiece support 30.
  • the second adjustment unit 20 which essentially also consists of the deformation body 25 and the thrust device 26.
  • the thrust device 26 of the second adjustment device also comprises a screw body 27 and a corresponding nut 28.
  • a compressive force is transmitted to the deformation body 25 by the screw body 27.
  • deformation occurs in the deformation body 25 under the influence of this force.
  • This deformation of the deformation body 25 then has an adjustment of the position of the deformation body 25 in the adjustment direction Y according to. This also results in the adjustment of the first adjusting device 10 connected to the second adjusting device 20 and thereby also an adjustment of the workpiece support 30.
  • the deformation bodies 15, 25 can be made of a metal or any other suitable elastic material.
  • Elasticity is the property of some substances to oppose a mechanical resistance to the applied force and often to deform to a greater or lesser extent, but to retake its initial shape after relieving.
  • forces act on a workpiece the distances between the material particles are increased or decreased by a small amount.
  • the mechanical energy used is stored and the workpiece changes its external shape. After discharge, the particles return to their original positions and the energy is released again. The workpiece resumes its original external shape. If the so-called elastic limit is exceeded, the workpiece deforms permanently and can no longer assume its original shape.
  • Elongation and bending differ. Elongation is the relative dimensional change (ie, lengthening or shortening) of a body due to a force acting on that body. In a tensile force is called a tensile elongation, while at a compressive force of a compressive strain or rather is spoken of the compression.
  • the force and the resulting strain are within certain limits proportional to each other
  • the dimensions lying transversely to the direction of force also result in the bending of a body, that is to say the mechanical change in the component geometry as a result of a bending moment and the resulting bending stresses.
  • FIG. 3 schematically illustrates the sequence of the method for positioning and / or fastening workpieces to be machined in a device according to an embodiment of the present invention, or the deformation process of the deformation body 25 of the second adjusting device 20.
  • FIG. 3a shows the second adjusting device 20 in the rest position
  • FIG. 3b shows the same adjusting direction 20 in a position after force has been applied thereto.
  • Reference numeral 25 again refers to the deformation body in both drawings, reference numeral 27 to the screw body, and reference numeral 28 to the nut.
  • L 0 the length of the second adjusting device 20 is denoted by L 0 .
  • This length Lo is basically composed of the length of the deformation body 25 and the length of the support body 23 of the pusher 26.
  • a small gap 22 may be provided between the deformation body 25 and the support body 23 of the pusher 26.
  • the size of this gap 22 does not play a decisive role in carrying out the method according to the invention.
  • the screw body 27 and the deformation body 25 are in direct contact, but there are no tension forces between the two bodies.
  • a force is exerted on the lateral surface of the deformation body 25 by the screw body 27 of the pusher 26.
  • this force leads to a corresponding deformation of the deformation body 25.
  • the deformation body 25 of the embodiment is a metal cuboid 21 which has a cavity 24. In this case, two of the four corners of the metal cuboid 21 are fixed and can not move.
  • the stress inside the metal cuboid 21 increases and the metal cuboid 21 is first compressed. But if the applied force is further increased, it will bend the metal cuboid 21, wherein the two unfixed corners move in the direction of the exertion of force. Accordingly, from the metal cuboid 21 by the action of the force and thanks to its elasticity properties a parallelogram, as shown in Figure 3b. This results in a slight shift of the upper edge of the metal cuboid or parallelogram 21 by ⁇ L. Thus, the length of the adjusting device 20 increases to reach a length Li (L 0 + ⁇ L). In FIG. 3, the deformation body 25 has a cavity 24.
  • This cavity 24 is used in particular to optimize the forces that arise in the interior of the metal cuboid 21 in the application of force in a particularly advantageous manner.
  • a cavity 24 is suitable, in which the individual end parts spread out to all four corners of the metal cuboid 21.
  • other forms of the cavity 24 are known, which are well suited to this.
  • this hollowing can either completely eliminate the material fatigue or the loss of the elastic properties of the metal cuboid 21, or it can be substantially reduced.
  • the method described above for positioning and / or fastening of workpieces to be machined thus has the decisive advantage that the smallest adjustments are made possible.
  • the production materials for the deformation bodies 15 and 25 can always be chosen so that the deformations can always be optimally adapted to the corresponding requirements.
  • Another advantage of the inventive method and the inventive device is that after the required adjustment no additional attachment of the workpiece to be machined is necessary. Since the deformation body 15 or 25 must first be tensioned to some point due to the elastic properties before a deformation (bending) occurs, the deformation bodies 15 and 25 are inevitably always under a certain tension during an adjustment. Therefore, the attachment of the workpiece in the machining position can actually be performed together and directly with the adjustment.
  • Figure 4 shows still another embodiment of the present invention.
  • reference numeral 10 refers to the first, and reference numeral 20 to the second adjustment.
  • the reference numeral 30 designates the workpiece support 30, and the reference numeral 40 the frame of the device.
  • reference numerals 16 and 26 respectively refer to the pushers of the first and second adjusting devices.
  • the reference number 50 in FIG. 4 relates to a third adjusting device, by means of which a coarse adjustment of the first adjusting device 10 in the first adjusting device X can be carried out.
  • Reference numeral 60 correspondingly refers to a fourth adjusting device which can be used for coarse adjustment of the second adjusting device 20 in the adjustment direction Y.
  • these two adjustment devices 50 and 60 can be conventional dovetail guides.
  • these two dovetail guides each comprise a lower 51, 61 and an upper part 52, 62, between which optionally, for example, a lubricating fluid can be used.
  • the fixing screws 53 and 63 can be used.
  • the third adjustment device 50 and the fourth adjustment device 60 can also be realized differently.
  • the device according to the invention can be constructed without these two adjusting devices.
  • a further adjustment device (not shown) can also be provided in the device for positioning and / or fastening workpieces to be machined, by means of which the entire device can be adjusted on the frame 40 in a third adjustment direction.
  • This third adjustment direction may in particular be one which is perpendicular to the two adjustment directions X and Y respectively. But there are of course other adjustment conceivable.

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

Abstract

L'invention concerne un procédé de positionnement et/ou de fixation de pièces à usiner et le dispositif correspondant, dans lesquels la pièce à usiner est posée sur un support de pièce à usiner (30) et le support de pièces à usiner (30) est ajusté grâce à une première unité d'ajustement (10) dans une première direction d'ajustement (X), ainsi que grâce à une seconde unité d'ajustement (20) dans une seconde direction d'ajustement (Y) dirigée à angle droit par rapport au premier dispositif d'ajustement (X), de sorte qu'une force est appliquée à au moins une surface du corps de déformation (15, 25) de la première unité d'ajustement (10) et/ou de la seconde unité d'ajustement (20) grâce à au moins un dispositif de poussée (16, 26), et de sorte que le corps de déformation (15, 25) est déformé en raison de la force appliquée, le support de pièce à usiner (30) étant ajusté dans la première direction d'ajustement (X) et/ou dans la seconde direction d'ajustement (Y). La longueur et/ou la forme du corps de déformation (15, 25) peuvent en particulier être modifiées en vertu de la force appliquée.
PCT/EP2007/050954 2007-01-31 2007-01-31 Procédé de positionnement et/ou de fixation de pièces à usiner et dispositif correspondant WO2008092504A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/050954 WO2008092504A1 (fr) 2007-01-31 2007-01-31 Procédé de positionnement et/ou de fixation de pièces à usiner et dispositif correspondant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/050954 WO2008092504A1 (fr) 2007-01-31 2007-01-31 Procédé de positionnement et/ou de fixation de pièces à usiner et dispositif correspondant

Publications (1)

Publication Number Publication Date
WO2008092504A1 true WO2008092504A1 (fr) 2008-08-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015003367A1 (de) * 2015-03-16 2016-09-22 Vollmer Werke Maschinenfabrik Gmbh Vorrichtung zum Abstützen eines zu bearbeitenden Werkstücks
CN106312657A (zh) * 2016-11-29 2017-01-11 沈阳鼓风机集团核电泵业有限公司 一种定位数控镗铣加工中心的工件中心的方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5669054A (en) * 1979-10-31 1981-06-10 Inoue Japax Res Inc Precision member
US4385434A (en) * 1981-06-08 1983-05-31 Visidyne, Inc. Alignment system
JPS6471637A (en) * 1987-09-11 1989-03-16 Hitachi Seiko Kk Height adjusting device
JPH01246036A (ja) * 1988-03-25 1989-10-02 Omron Tateisi Electron Co 微動ステージ装置
WO2006108316A1 (fr) * 2005-04-15 2006-10-19 Rollomatic Sa Dispositif d'appui reglable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5669054A (en) * 1979-10-31 1981-06-10 Inoue Japax Res Inc Precision member
US4385434A (en) * 1981-06-08 1983-05-31 Visidyne, Inc. Alignment system
JPS6471637A (en) * 1987-09-11 1989-03-16 Hitachi Seiko Kk Height adjusting device
JPH01246036A (ja) * 1988-03-25 1989-10-02 Omron Tateisi Electron Co 微動ステージ装置
WO2006108316A1 (fr) * 2005-04-15 2006-10-19 Rollomatic Sa Dispositif d'appui reglable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015003367A1 (de) * 2015-03-16 2016-09-22 Vollmer Werke Maschinenfabrik Gmbh Vorrichtung zum Abstützen eines zu bearbeitenden Werkstücks
EP3072635A3 (fr) * 2015-03-16 2016-12-28 VOLLMER WERKE Maschinenfabrik GmbH Dispositif de soutien d'une piece a usiner
CN106312657A (zh) * 2016-11-29 2017-01-11 沈阳鼓风机集团核电泵业有限公司 一种定位数控镗铣加工中心的工件中心的方法及装置

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