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WO1981000979A1 - Chargeur pour tour frontal a commande numerique cnc - Google Patents

Chargeur pour tour frontal a commande numerique cnc Download PDF

Info

Publication number
WO1981000979A1
WO1981000979A1 PCT/DE1980/000144 DE8000144W WO8100979A1 WO 1981000979 A1 WO1981000979 A1 WO 1981000979A1 DE 8000144 W DE8000144 W DE 8000144W WO 8100979 A1 WO8100979 A1 WO 8100979A1
Authority
WO
WIPO (PCT)
Prior art keywords
control
gripper
chuck
loading
opening
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.)
Ceased
Application number
PCT/DE1980/000144
Other languages
German (de)
English (en)
Inventor
N Hessbrueggen
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.)
EMAG MASCHFAB GmbH
Original Assignee
EMAG MASCHFAB 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 EMAG MASCHFAB GmbH filed Critical EMAG MASCHFAB GmbH
Publication of WO1981000979A1 publication Critical patent/WO1981000979A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
    • B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
    • B23B31/302—Hydraulic equipment, e.g. pistons, valves, rotary joints
    • 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
    • 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
    • B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/04—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of grippers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41815—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the cooperation between machine tools, manipulators and conveyor or other workpiece supply system, workcell
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/42—Chucks operated by a motor which is movable to engage with, or disengage from, the chuck operating means
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the invention relates to a loading device for CNC-controlled front lathes with a gripper chuck holder with gripper chuck for the feeding and removal of workpieces, both the drive device of the gripper chuck holder for its axial and pivoting movement and the drive device of the gripper chuck depending on a control of the program memory control received from the work cycle of the machine tool.
  • the impulses for the control of the work cycle come from the CNC control of the lathe, but the charging devices are driven in an electro-pneumatic, electro-hydraulic or electro-mechanical manner.
  • the approach to the individual positions of the loading devices is controlled by stops and limit switches. This results in limits regarding the optimal acceleration and deceleration as well as the maximum possible movement speed of the charging device. Furthermore, the adjustment effort when converting is very high.
  • the object of the invention is to provide a loading device which is matched in its working speed to the production possibilities of CNC automatic lathes, i.e. this is equivalent, and in which the work and time required for the changeover is significantly reduced.
  • Another significant advantage resulting from the invention is that by using a microprocessor control with program memory and a closed position control loop, the respective positions of the gripper chuck holder can be controlled exactly and that when the workpiece size is changed, the lathe must be converted , this changeover can be done by entering new data in the memory of the program memory control in a fraction of the time that was previously necessary to adjust stops and limit switches.
  • the necessary tent span for gripping and releasing a workpiece is also significantly reduced here, since the jaws of the gripper chuck starting from a certain starting point, the arises from the clamping position for a specific workpiece, only be opened so far that a safe delivery of the previously detected workpiece and a safe pick-up of a new workpiece is possible.
  • the jaws of the gripper chuck are not moved over their entire possible stroke as was previously necessary, but only over a very small part of the total stroke.
  • either a separate microprocessor control can be provided, which has a. Customizing the commands for the Carrying out the individual types of movement from the CMC controller or it can be advantageous to assign an NC axis of the lathe that is not required during the loading process to the CNC controller of the loading unit. In both cases, the routes are specified numerically. With the so-called axis switching of an NC axis of the machine that is not required during loading, the paths of the gripper chuck carriers can be programmed into the memory of the microprocessor control via manual input or data carriers. When a so-called “learnable" microprocessor control is used, the paths traveled when the individual work cycles of the loading device are first run through are stored in the program memory and are thus available for the subsequent work processes. ,
  • the gripper chuck on the gripper chuck carrier or on the turning station if there is one, has a large clamping range of the jaws and is preferably adjusted by a hydraulic motor, the; a magnetic switch supplied oil quantity is monitored by a timer of the program memory control. In this way, the opening and closing movements of the jaws can be limited to a predetermined value.
  • the starting point from which the timer allows a controlled oil flow to the hydraulic motor to open the chuck is determined by the workpiece itself. From this point, the chuck is opened according to the specified period of time and during the later clamping process, the chuck is closed until a pressure switch responds. This point is again the decisive starting point for the timer in the next sequence.
  • the timer for the opening process is activated depending on the machine cycle; also for the clamping process. The opening process takes place after the presence of the clamping pressure has been reported by a pressure switch. If this starting point is now a predetermined one during the clamping process
  • Time value is exceeded without the pressure switch If a signal is received that the necessary clamping pressure is present, the control process is interrupted via an interference signal and the chuck is moved back to the starting point by this overrun time value.
  • the chuck In connection with a chuck with a large clamping range, the chuck can be easily programmed into different workpiece sizes, so that the chuck for the respective workpiece size, as already described, only performs small opening and closing movements within the large clamping range. In this way, there is no need to change the gripper jaws within a certain workpiece size range. Under a large clamping range, for example, a clamping path of 75 mm with an outer diameter of the chuck of 230 mm is considered. Such large clamping ranges can be achieved with spiral chucks.
  • the axial movements of the gripper chuck carrier change.
  • the new path variables are specified numerically.
  • the setting process is such that a workpiece clamped in the chuck of the work spindle is gripped by the gripper of the gripper chuck holder, the approach to the workpiece being carried out by manual input, and the new value is then stored in the memory of the program memory controller.
  • the gripper chuck carrier is then moved to a turning station, if present, to the delivery station and to the pick-up station, the corresponding stations with their feed and discharge rails or grippers being manually adjusted to the new position of the gripper chuck carrier, for example by means of a hand crank and spindle drive can be done.
  • the invention is shown in a drawing, for example.
  • 1a to 1d the workflow of a loading device for a two-spindle front lathe
  • FIG. 2 shows a schematic representation of a gripper chuck carrier with a drive device, the axial positions assumed during the various working positions being shown;
  • FIG. 3 shows a partial view of a front lathe with a drive device for a loading device
  • Fig. 4 is a schematic representation of a drive for the jaws of a gripper chuck.
  • a front lathe 1 is shown with two work spindles 2 and 3, which are provided for the machining of a blank to a semi-finished part or for the processing of the semi-finished part to a finished part.
  • a loading device generally designated 4, above which a turning device 5 is arranged.
  • a feed device 6 and a discharge device 7 which have a feed rail 8 or discharge rail 9 and swivel flaps 10 and 11, respectively, which the workpiece arriving and leaving in the horizontal direction for the takeover or delivery of a workpiece by a the gripper chuck 12 to 15 transfers the workpiece from the horizontal into a vertical position during the pick-up process and from the vertical position into a horizontal position during the discharge process.
  • the gripper chucks 12 to 14 are arranged at the ends of a loading cross 18 of the loading device 4, which, as can be seen from FIG. 2, is fastened to a shaft 16 which is connected to a drive device 17 which not only the loading cross 18 into the individual in Fig.
  • La to 1d pivot positions can also move in the axial direction of this shaft.
  • a workpiece brought into the vertical position by the flap 10 has just been picked up by the gripper chuck 12.
  • the gripper 15 has released a workpiece which had already been finished and which was removed to a storage device by moving the flap 11 into the horizontal position via the discharge channel.
  • the gripper chucks 13 and 14 are empty in this position.
  • Fig. 1b the pick-up position is shown, which is designated by II in Fig. 2.
  • the cross is rotated by 90 ° compared to the basic position.
  • the gripper chuck 12 carries the raw part taken over from the basic position and delivers it to a gripper 19 of the turning station 5.
  • the gripper 13 of the loading device grasps a semi-finished part that is kept in stock in the turning station, while the gripper 14 picks up a finished part from the work spindle 3.
  • the gripper 15 also picks up a semi-finished part from the work spindle 2.
  • the gripper 12 is a raw part to the work spindle 2 and by the gripper 13 a semi-finished part, which was previously turned by the turning device 5, to the Working spindle 3 delivered.
  • the gripper 14 transfers the semi-finished part taken from the waiting position according to FIG. 1b, which was processed by the work spindle 2, and delivers it to the gripper 19 of the turning device.
  • the gripper 15 carries a finished part.
  • the loading cross 18 has performed a rotation of 180 °.
  • FIG. 1d which again corresponds to the basic position according to FIG. 1a
  • the loading has cross 18 with respect to the delivery position shown in FIG. 1c a rotation of 90 °.
  • the finished part of the gripper 15 is delivered to the flap 11 of the discharge device 7, while the gripper 12 is shortly before the takeover of a raw part which is located on the flap 10 which has not yet been swung open.
  • the grippers 13 and 14 are empty.
  • IV denotes the reference point of the machine in FIG. 2.
  • a DC servo motor 23 is controlled by the program memory control described at the outset, depending on the operating cycle of the machine.
  • The. Wave 16 is in the direction of the double arrow 25, i.e. shifted in the axial direction.
  • a DC servo motor 27 is provided which drives a worm 29 via a toothed belt 28, which worm engages with a worm wheel 30 seated on the shaft 16.
  • FIG. 4 shows a gripper chuck 31 which is designed as a spiral chuck, the jaws 32 of which can be moved by a hydraulic motor 33 which is connected to a magnetic slide 34 via two lines 35 and 36 which can be connected to lines 37 and 38, of which the line 37 is connected to a pump 39 and the line 38 to a return tank 40.
  • a pressure switch 41 On the line 36 is connected to a pressure switch 41 which, when the necessary clamping pressure is reached, emits a signal to the program memory control, which indicates that the clamping process has ended and the gripper chuck holder can be moved further in accordance with the intended work cycle.
  • the lines 35 and 37 or 36 and 38 are interrupted.
  • the arrows 42 and 43 or 44 and 45 indicate the possible switching positions of the magnetic slide, in which either the lines 35 and 37 or 36 and 38 or the line 35 is connected to the line 38 and the line 36 to the line 37.
  • the gripper chuck is closed, ie a workpiece can be gripped, while when the line 35 is connected to the line 37 the hydraulic motor is moved in the opposite direction and the chuck is opened.
  • a two-armed carrier can of course also be provided as the gripper chuck carrier, for example if workpieces are to be brought from a feed rail to a single-spindle front lathe and from there to a discharge rail, from where the workpieces can either arrive at a store or at a turning station. In the latter case, a further single-spindle turning machine is then provided after the Wefldestation in order to finish the turned semi-finished parts.
  • the structure and the control of the gripper chuck 12 to 15 and 19 correspond to the gripper chuck 31 described in FIG. 4 with the control device shown there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Turning (AREA)
  • Feeding Of Workpieces (AREA)

Abstract

Le chargeur comprend un porte-mandrins cruciforme (18), dans lequel les extremites des bras portent des mandrins (12-15) qui transportent la piece a usiner d'une station d'amenee (10) vers une broche de travail, de la vers une station de retournement (5), vers une autre broche de travail et, finalement, vers une station d'evacuation (11) L'entrainement des porte-mandrins s'effectue au moyen de moteurs a courant continu, qui sont commandes par une commande a programme incorporant une regulation en boucle fermee de position en fonction du temps d'usinage du tour. Les mouvements d'ouverture et de fermeture de tous les mandrins prevus sur le portemandrins (18) et la station de retournement (5) sont derives d'un moteur hydraulique, dont la commande pour l'ouverture des mandrins depend d'un element de temps a intervalle de temps fixe; le debut de l'ouverture est declenche par la piece a usiner elle-meme. Pour l'ouverture, l'element de temps est active en fonction du temps d'usinage du tour. Les courses du chargeur sont commandees numeriquement.
PCT/DE1980/000144 1979-10-06 1980-10-06 Chargeur pour tour frontal a commande numerique cnc Ceased WO1981000979A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2940560 1979-10-06
DE19792940560 DE2940560A1 (de) 1979-10-06 1979-10-06 Ladevorrichtung fuer cnc-gesteuerte frontdrehmaschinen

Publications (1)

Publication Number Publication Date
WO1981000979A1 true WO1981000979A1 (fr) 1981-04-16

Family

ID=6082851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1980/000144 Ceased WO1981000979A1 (fr) 1979-10-06 1980-10-06 Chargeur pour tour frontal a commande numerique cnc

Country Status (3)

Country Link
EP (1) EP0039344A1 (fr)
DE (1) DE2940560A1 (fr)
WO (1) WO1981000979A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546090A1 (fr) * 1981-12-16 1984-11-23 Weisser Soehne J G Dispositif pour charger un tour frontal
EP0138518A3 (en) * 1983-10-12 1986-09-10 Pratt Burnerd International Limited Jaw changing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436615C1 (de) * 1984-10-05 1985-12-05 Emag Maschinenfabrik Gmbh, 7335 Salach Als Greiferfutter dienendes Dreibacken-Spannfutter
DE10138748B4 (de) * 2001-07-30 2006-04-20 Stama Maschinenfabrik Gmbh Werkzeugmaschine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094897A (en) * 1960-04-13 1963-06-25 Pfauter Hermann Safety device for automatic work loader
DE2064215A1 (de) * 1970-02-12 1971-08-19 Werkzeugmasch Heckert Veb Verfahren und Schaltungsanordnung zur gleichzeitigen numerischen Strecken oder Positioniersteuerung von zwei Maschinen insbes Werkzeugmaschinen
FR2294007A1 (fr) * 1974-12-12 1976-07-09 Weisser Sohne Jg Dispositif de chargement automatique pour tour frontal a deux broches
DE2536615A1 (de) * 1975-08-16 1977-02-24 Hegenscheidt Gmbh Wilhelm Verfahren zur spannkontrolle von eisenbahnraedern auf senkrechtdrehmaschinen
US4011437A (en) * 1975-09-12 1977-03-08 Cincinnati Milacron, Inc. Method and apparatus for compensating for unprogrammed changes in relative position between a machine and workpiece
FR2322693A1 (fr) * 1975-09-03 1977-04-01 Olivetti & Co Spa Centre de travail auto-adaptable pour automatisation programmable
US4079235A (en) * 1976-12-27 1978-03-14 Mcdonnell Douglas Corporation Computer numerically controlled threadcutting machine tool
FR2407043A1 (fr) * 1977-10-29 1979-05-25 Pratt Int Ltd Burnerd Procede et dispositif de montage de pieces

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094897A (en) * 1960-04-13 1963-06-25 Pfauter Hermann Safety device for automatic work loader
DE2064215A1 (de) * 1970-02-12 1971-08-19 Werkzeugmasch Heckert Veb Verfahren und Schaltungsanordnung zur gleichzeitigen numerischen Strecken oder Positioniersteuerung von zwei Maschinen insbes Werkzeugmaschinen
FR2294007A1 (fr) * 1974-12-12 1976-07-09 Weisser Sohne Jg Dispositif de chargement automatique pour tour frontal a deux broches
DE2536615A1 (de) * 1975-08-16 1977-02-24 Hegenscheidt Gmbh Wilhelm Verfahren zur spannkontrolle von eisenbahnraedern auf senkrechtdrehmaschinen
FR2322693A1 (fr) * 1975-09-03 1977-04-01 Olivetti & Co Spa Centre de travail auto-adaptable pour automatisation programmable
US4011437A (en) * 1975-09-12 1977-03-08 Cincinnati Milacron, Inc. Method and apparatus for compensating for unprogrammed changes in relative position between a machine and workpiece
US4079235A (en) * 1976-12-27 1978-03-14 Mcdonnell Douglas Corporation Computer numerically controlled threadcutting machine tool
FR2407043A1 (fr) * 1977-10-29 1979-05-25 Pratt Int Ltd Burnerd Procede et dispositif de montage de pieces

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Werkstatt und Betrieb, 106. Jahrgang Heft 9, September 1973, (Munchen, DE) H. SCHIEMANN, "Automatisierung von NC-Drehmaschinen", siehe Seite 670, linke Spalte, Zeilen 36 bis 40. *
Werkstatt und Betrieb, 110. Jahrgang Heft 10, Oktober 1977, (Munchen DE) B.H. AUER, "Flexible Fertigungszellen fur automatisierte Fabriken", siehe Bild 2, Seite 707. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546090A1 (fr) * 1981-12-16 1984-11-23 Weisser Soehne J G Dispositif pour charger un tour frontal
EP0138518A3 (en) * 1983-10-12 1986-09-10 Pratt Burnerd International Limited Jaw changing apparatus

Also Published As

Publication number Publication date
EP0039344A1 (fr) 1981-11-11
DE2940560A1 (de) 1981-04-09

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