WO2018215556A1 - Dispositif de serrage pour fixer une pièce ainsi que machine-outil comprenant un tel dispositif de serrage - Google Patents

Dispositif de serrage pour fixer une pièce ainsi que machine-outil comprenant un tel dispositif de serrage Download PDF

Info

Publication number
WO2018215556A1
WO2018215556A1 PCT/EP2018/063534 EP2018063534W WO2018215556A1 WO 2018215556 A1 WO2018215556 A1 WO 2018215556A1 EP 2018063534 W EP2018063534 W EP 2018063534W WO 2018215556 A1 WO2018215556 A1 WO 2018215556A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
rotary encoder
clamping element
clamping device
workpiece
Prior art date
Application number
PCT/EP2018/063534
Other languages
German (de)
English (en)
Inventor
Dennis Beihofer
Michael Marré
Henning Wagner
Werner Michi
Original Assignee
Felss Systems Gmbh
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 Felss Systems Gmbh filed Critical Felss Systems Gmbh
Publication of WO2018215556A1 publication Critical patent/WO2018215556A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/10—Manipulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/10—Manipulators
    • B21J13/12—Turning means
    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/002—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring the holding action of work or tool holders
    • B23Q17/003—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring the holding action of work or tool holders by measuring a position

Definitions

  • Clamping device for fixing a workpiece and machine tool with such a clamping device
  • the invention relates to a clamping device for fixing a workpiece
  • the invention further relates to a machine tool for machining workpieces, with a processing device for workpiece machining and with a clamping device by means of which a workpiece can be fixed before and / or during and / or after the workpiece machining.
  • a plurality of inductive proximity switches are provided for detecting functional states of the clamping device, by means of which individual pivot positions of the pliers legs of the collet can be detected.
  • the object of the present invention is to increase the process reliability of the workpiece fixing yet. In particular, it must be ensured that a workpiece is permanently clamped in a defined manner during a forming process.
  • a rotary encoder continuously provides information about the instantaneous amount of the pivoting movement, that is to say about the instantaneous pivoting angle of the pivotable clamping element or elements of the clamping device. Accordingly, at the clamping device according to the invention and at the machine tool according to the invention, the instantaneous relative pivotal position of the two clamping elements is determined not only selectively but continuously and consequently with high resolution. A comprehensive knowledge of the current relative pivot position of the two clamping elements allows a reliable conclusion to the current functional state of the clamping device.
  • a plurality of functional states of the clamping device can be derived.
  • information about the amount provided by the rotary encoder information about the direction of the pivoting movements performed by the clamping element (s) may also be provided.
  • the directional information from the rotary encoder is also preferred.
  • Rotary encoders encoders of conventional design are particularly suitable as rotary encoders for the clamping device according to the invention and for the machine tool according to the invention.
  • a preferred embodiment of the invention can be determined by detecting selected instantaneous amounts of the pivoting movement (s) of the pivotable clamping elements or momentary relative Schwenkstel- lungs of the two clamping elements, which are in practical use of the clamping device of particular importance. Specifically, it can be determined whether the clamping device is in the open state and / or whether the clamping device is closed while a workpiece jams or loosely stores and / or if the clamping device is in an irregular functional state and lost, for example, a workpiece to be fixed Has. According to the invention, a single rotary encoder, by means of which the pivoting position of one of the clamping elements is detected, suffice.
  • the evaluation device of the clamping device is capable of determining the instantaneous amount of the pivotal movement of the one detected by means of the rotary encoder Clamping element to determine the instantaneous relative pivot position of the two clamping elements.
  • a rotary encoder with two rotary encoder units is provided.
  • the other rotary encoder unit continuously detects the instantaneous pivot position of the other clamping element.
  • the evaluation device connected to the rotary encoder units continuously determines the instantaneous relative pivoting position of the two clamping elements and thereby the functional state of the clamping device as a whole.
  • clamping device according to the invention components are provided in a further development of the invention for the clamping device according to the invention, which have proven to be reliable.
  • the clamping device according to claim 4 as a rotary encoder on an incremental encoder preferably of conventional design.
  • the clamping device according to claim 5 is provided with a particular conventional collet with two-armed pliers legs.
  • Claim 7 relates to a rotary kneader machine tool according to the invention, for which the clamping device according to the invention is particularly suitable.
  • the invention will be explained in more detail with reference to exemplary schematic representations. Show it :
  • Figure 2 a highly schematic representation of the collet according to Figure 1 in the closed state of the clamping device
  • Figure 3 a highly schematic representation of the collet according to Figure 1 in the open state of the clamping device.
  • a tensioning device 1 of a circular swaging machine 2 which is indicated, has a collet 3 with clamping elements in the form of two-armed pliers limbs 4, 5.
  • the pivot axis pin 6 defines a pivot axis 8 of the forceps leg 4
  • the pivot axis 7 defines a parallel to the pivot axis 8 of the forceps leg 4 extending pivot axis 9 of the forceps leg 5.
  • Both pivot axes 6, 7 are rotatably mounted in bearing eyes of a bearing housing 10 of the collet 3. Together with the seated pliers legs 4, 5, the
  • the rotational or pivoting movements of the forceps arms 4, 5 are generated in the illustrated example by means of a hydraulic drive 11 of the tensioning device 1.
  • a hydraulic drive 11 of the tensioning device 1 Between a conventional hydraulic cylinder of the drive 11 and the pliers legs 4, 5, a likewise conventional transmission is connected, by means of which the linear drive movements generated by the hydraulic cylinder in pivotal movements of the pliers legs 4, 5 are implemented.
  • the hydraulic cylinder and the gearbox are in a drive housing 13 housed, to which the bearing housing 10 of the collet 3 is flanged.
  • the tensioning device 1 is controlled by means of a programmable logic controller (PLC) 14 of the tensioning device 1, which is shown very schematically in FIG.
  • PLC programmable logic controller
  • Parts of the programmable logic controller 14 are rotary encoder units 15, 16 of a rotary encoder 17 and a numerical evaluation device 18 connected to the rotary encoder units 15, 16.
  • the rotary encoder units 15, 16 are conventional incremental rotary encoder units. In FIG. 1, it can be seen in detail only the rotary encoder unit 15 seated on the pivot axis pin 6 of the tong leg 4. Accordingly, the rotary encoder unit 16 concealed in FIG. 1 by the bearing housing 10 of the collet 3 is mounted on the pivot axis pin 7 of the tong leg 5.
  • the rotary encoder 17 with the two rotary encoder units 15, 16 is part of a detection device 19.
  • the rotary encoder units 15, 16 continuously the angular position of the pliers legs 4, 5 with respect to their pivot axes 8, 9 detected.
  • the rotary encoder units 15, 16 continuously provide information both about the instantaneous amount and about the instantaneous direction of the pincer legs 4, 5 about the pivot axes 8, 9 executed pivoting movements. From this information, the evaluation device 18 of the programmable logic controller 14 continuously determines the instantaneous relative pivot position of the two forceps arms 4, 5.
  • FIG. 2 Two selected relative pivot positions of the two forceps arms 4, 5 are shown in FIG. 2 and FIG.
  • the forceps arms 4, 5 are provided with clamping jaws 20, 21, which form semicylindrical hollow shapes 22, 23 on their mutually facing sides.
  • the two hollow molds 22, 23 add up to a hollow-cylindrical workpiece holder of the collet 3.
  • the forceps arms 4, 5 are delivered in a relative pivot position, in which the clamping jaws 20, 21 abut each other.
  • the tensioning device 1 is consequently in the closed state.
  • the detected by the rotary encoder units 15, 16 amount of the forceps arms 4, 5 about the pivot axes 8, 9 executed pivoting movements is in each case 90 °.
  • This angle is measured for each of the pliers legs 4, 5 between a fixed during pivoting movements of the pliers legs 4, 5 vertical reference line on the one hand and with the pliers legs 4, 5 mitbetaineden reference line, which extends horizontally in Figure 2.
  • a workpiece arranged between the clamping jaws 20, 21 of the forceps limbs 4, 5 would be fixed in a clamping manner by the collet chuck 3 with a diameter oversize relative to the workpiece holder formed by the hollow molds 22, 23 of the clamping jaws 20, 21.
  • the pliers legs 4, 5 are in a relative pivoting position, in which the clamping jaws 20, 21 of the pliers legs 4, 5 are moved away from one another.
  • the clamping device 1 is thus transferred to the open state.
  • the detected by the rotary encoder units 15, 16 amount of the forceps arms 4, 5 about the pivot axes 8, 9 executed pivoting movements is in each case smaller than 90 °.
  • a positioned between the clamping jaws 20, 21 of the pliers legs 4, 5 workpiece would be released from the collet 3.

Landscapes

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

Abstract

Dispositif de serrage (1) pour fixer une pièce, comprenant deux éléments de serrage (4, 5), parmi lesquels un élément de serrage (4, 5) peut être déplacé par un mouvement de pivotement autour d'un axe de pivotement (8, 9) en modifiant une position de pivotement momentanée de l'élément de serrage (4, 5) ainsi qu'en modifiant une position de pivotement relative momentanée des deux éléments de serrage (4, 5) l'un par rapport à l'autre. Un dispositif de détection (19) du dispositif de serrage (1) comprend un capteur rotatif (17), au moyen duquel la position de pivotement momentanée de l'élément de serrage (4, 5) peut etre détectée continuellement, par la détection continue d'un montant momentané du mouvement de pivotement de l'élément de serrage (4, 5) au moyen du capteur rotatif (17). Un dispositif d'évaluation (18) est lié au dispositif de détection (19), au moyen duquel la position de pivotement relative momentanée des deux éléments de serrage (4, 5), liée à la quantité momentanée du mouvement de pivotement de l'élément de serrage (4, 5), peut être déterminée au moyen de la quantité momentanée du mouvement de pivotement de l'élément de serrage (4, 5) détecté continuellement.
PCT/EP2018/063534 2017-05-26 2018-05-23 Dispositif de serrage pour fixer une pièce ainsi que machine-outil comprenant un tel dispositif de serrage WO2018215556A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202017103186.1 2017-05-26
DE202017103186.1U DE202017103186U1 (de) 2017-05-26 2017-05-26 Spannvorrichtung zum Fixieren eines Werkstücks sowie Werkzeugmaschine mit einer derartigen Spannvorrichtung

Publications (1)

Publication Number Publication Date
WO2018215556A1 true WO2018215556A1 (fr) 2018-11-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/063534 WO2018215556A1 (fr) 2017-05-26 2018-05-23 Dispositif de serrage pour fixer une pièce ainsi que machine-outil comprenant un tel dispositif de serrage

Country Status (2)

Country Link
DE (1) DE202017103186U1 (fr)
WO (1) WO2018215556A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112758671A (zh) * 2021-01-20 2021-05-07 无锡弗沃德科技有限公司 一种侧罩式信号检测装置
CN113560478A (zh) * 2021-08-10 2021-10-29 山东工业职业学院 一种轧钢冶炼用钢料雏形捶打稳定性夹持机构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112318155B (zh) * 2020-11-06 2021-08-03 扬州力创机床有限公司 一种方便调节尺寸的机床加工用夹具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217094B1 (en) * 1999-05-24 2001-04-17 Japan Servo Co., Ltd. Object holding device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5875417A (en) * 1996-11-18 1999-02-23 Isi Norgren Inc. Clamp arm position sensing apparatus
DE102010016333B4 (de) * 2010-04-06 2018-02-08 Turck Holding Gmbh Kniehebelspannvorrichtung mit einer Winkelerfassungseinrichtung durch einen Schwingkreis
JP2017006992A (ja) * 2015-06-17 2017-01-12 Smc株式会社 チャック装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217094B1 (en) * 1999-05-24 2001-04-17 Japan Servo Co., Ltd. Object holding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112758671A (zh) * 2021-01-20 2021-05-07 无锡弗沃德科技有限公司 一种侧罩式信号检测装置
CN113560478A (zh) * 2021-08-10 2021-10-29 山东工业职业学院 一种轧钢冶炼用钢料雏形捶打稳定性夹持机构

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