EP0979157A2 - Procede et dispositif de commande d'appareils laser - Google Patents

Procede et dispositif de commande d'appareils laser

Info

Publication number
EP0979157A2
EP0979157A2 EP98932029A EP98932029A EP0979157A2 EP 0979157 A2 EP0979157 A2 EP 0979157A2 EP 98932029 A EP98932029 A EP 98932029A EP 98932029 A EP98932029 A EP 98932029A EP 0979157 A2 EP0979157 A2 EP 0979157A2
Authority
EP
European Patent Office
Prior art keywords
laser
machine
connections
control unit
program
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.)
Withdrawn
Application number
EP98932029A
Other languages
German (de)
English (en)
Inventor
Meinhard Lemuth
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.)
Lemuth Prazisionsteile GmbH
Original Assignee
Lemuth Prazisionsteile 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 Lemuth Prazisionsteile GmbH filed Critical Lemuth Prazisionsteile GmbH
Publication of EP0979157A2 publication Critical patent/EP0979157A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
    • B23K26/0673—Dividing the beam into multiple beams, e.g. multifocusing into independently operating sub-beams, e.g. beam multiplexing to provide laser beams for several stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
    • 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
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/414—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
    • 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
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45138—Laser welding

Definitions

  • the invention relates to a method and a device for controlling laser processing units, in which programmable laser generators are connected via flexible beam guidance systems to laser processing heads, with which material processing is carried out on program-controlled machines, with control signals from different machine controls via one central control unit to one or more laser generators - gates are forwarded.
  • manipulators which can be moved in several degrees of freedom, in particular industrial robots, for material processing by means of a laser beam, for example for welding or cutting.
  • the laser beam is fed from a stationary laser via a flexible beam guidance system to a laser processing head, which can be moved with the help of the robot.
  • the flexible beam guidance system can consist of a telescope arrangement with several articulated deflection mirrors or an optical fiber cable.
  • the beam guidance system with its coupling point is on the laser connected and extends freely through the space to the manipulator with which the laser processing head is moved.
  • the invention is based on the object of specifying a method and a device for control for laser devices with which it is possible with simple means to variably couple different high-power lasers with different program-controlled machines and thereby to exclude faulty connections with a high degree of certainty.
  • a central control unit with an integrated computer control for processing the control signals of the machine control and for controlling the laser generator is arranged between the programmable laser generator and the laser processing head.
  • the central control unit contains machine-side and laser-side coded plug connectors, via which the connection between the laser generators and the laser processing heads can be designed to be interchangeable, the line-side connecting parts containing means for programming.
  • the laser radiation is guided directly from the laser generators to the machines via flexible beam guidance systems.
  • a safe production process can be guaranteed with the least expenditure on laser devices.
  • the laser units can thus be utilized to the maximum, and in the event of breakdowns or maintenance work on a laser system, the freely selectable assignment of different units can be used to avoid or at least greatly shorten an interruption in the production process.
  • FIG. 1 shows a schematic representation of the device on a complex laser processing system
  • Figure 2 is a circuit diagram for the laser processing system
  • Figure 3 shows the routing of a safety circuit from the laser device to the laser processing point.
  • Figure 1 explains the overall arrangement.
  • a central control unit with integrated computer control is arranged between laser devices and laser processing points.
  • the controls of the laser devices are connected to the central control unit on the laser side in the laser connector field via standardized connectors.
  • the safety and control interfaces are organized in the control unit in such a way that uniform slots for the connection of the machine controls are available on the machine side in the machine connector field according to the number of laser channels.
  • the safety circuits between the machine control and the laser generator are implemented, the associated laser program numbers are transmitted and the control signals are exchanged via these interfaces.
  • the integrated computer control organizes the laser monitoring, the start routines of the individual laser units and enables the laser power distribution to be optimized for the entire production system.
  • the flexible beam guidance systems which lead the laser radiation directly from the respective laser device to the respective processing station, are permanently connected to monitoring lines.
  • a safety circuit is formed via these monitoring lines and the connection between the central laser control system and the machine, which monitors the laser cable and its slot.
  • the central control unit for coupling laser and machine controls is located in a control cabinet.
  • the laser devices are connected to this in the laser connector field via uniform connectors. These can be exchanged with one another as desired.
  • FIG. 2 explains the circuit arrangement.
  • the laser interfaces and the I / O channels of the integrated computer control are divided so that the machine interfaces are generated according to the number of laser channels.
  • the required number of slots for connecting the machine controls then results in the machine connector plug field.
  • the assignment of the machine controls or laser processing points is freely selectable and can be changed as required.
  • the central control unit consists of the following functional units:
  • the laser devices are connected to the laser-side connector field.
  • the safety circuits and the I / O interfaces of the laser control are connected. Safety circles are provided.
  • main safety lock control which prevents the unwanted escape of laser light in the main laser channel
  • the I / O interface includes:
  • the connectors for the laser connection are designed in a uniform manner to enable a quick change of the connected laser devices.
  • the main safety circuit includes an EMERGENCY STOP circuit, which acts on the EMERGENCY STOP circuits of the connected laser devices and switches off all lasers in the event of an accident, as well as a main safety lock interlock, which is used to close the main lock on all laser devices via key switches, entrance area monitoring or other higher-level safety switches and therefore no laser radiation can escape.
  • the laser channel safety locks are controlled independently of the main safety lock and prevent the uncontrolled emergence of laser beams in the individual laser channels.
  • control circuits for these closures are routed to the control center via the laser connection plug field and internally distributed directly to the slots for the machine connection. This makes it possible to integrate each laser channel closure into the corresponding safety circuit of the connected machine in terms of hardware. Each laser channel can be blocked individually without influencing other laser channels. The status of these individual safety circuits is communicated to the computer control, which can evaluate the associated signals accordingly.
  • the internal computer control is connected to the I / O interfaces of the connected laser devices via the laser connector field and to the connected machine controls via the machine connector field.
  • the computer control performs the following functions:
  • the switchover unit is used to switch the signal path of the commands required for laser triggering directly from the machine control to the laser interface.
  • the laser pulse or the laser program can thus be triggered directly by the machine without losing cycle time.
  • the type of power output is determined by internal laser programs. By assigning laser program numbers, a specific assignment of program numbers to the laser processing points is determined.
  • the laser programs for all processing stations are stored in all laser controls.
  • the laser program number is encoded in the machine controls for the respective laser processing point. With the switchover unit, this program number is switched directly to the laser when selected. This ensures that the correct laser program is processed at the corresponding laser processing point even after a machine interface has been plugged into the machine connector field.
  • the connecting cables to the machine controls are connected to the machine-side connector panel.
  • a slot is available for each laser channel, and a laser processing point can be assigned to each slot on the machine side.
  • the individual slots are designed identically, so that the assignment to the individual machine controls can be freely selected and the assignment can be changed by simply changing the plug.
  • Each slot on the machine side contains the following interfaces:
  • the fiber optic cable monitoring prevents laser radiation from escaping at an unwanted point if the laser light cables or control lines are incorrectly plugged in again. This is achieved in that a monitoring cable is firmly connected to the light guide cable.
  • the monitoring cable is routed to the machine controller at the machine-side connection point of the laser cable.
  • the monitoring cable is coupled to the central control unit via plug connectors on the laser connection plug field and is guided through this via the machine connection plug field to the machine control.
  • a safety circuit is only activated and the safety circuit to the associated laser channel is closed only if these connections all match.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé et un dispositif de commande pour appareils laser, et a pour but de connecter de manière variable, avec des moyens simples, divers lasers de haute puissance avec différentes machines à commande programmée, tout en excluant, avec une grande fiabilité, des connexions défectueuses. L'invention est, en conséquence, caractérisée en ce qu'aussi bien les connexions du système de guidage du faisceau avec les branchements au générateur laser et aux machines, que les connexions des lignes pour les signaux de commande sont guidées vers les composants respectifs dans lesquels sont intégrés des codes de sécurité. L'invention concerne un procédé et un dispositif pour la commande des unités d'usinage au laser, dans lesquels des générateurs au laser programmables sont connectés, via des systèmes flexibles de guidage du faisceau, avec des têtes d'usinage au laser effectuant l'usinage du matériau sur des machines à commande programmable, des signaux de commande émanant de différentes commandes de machines étant transmis à un ou plusieurs générateurs laser via une unité de commande centrale.
EP98932029A 1997-04-30 1998-04-29 Procede et dispositif de commande d'appareils laser Withdrawn EP0979157A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19718137A DE19718137A1 (de) 1997-04-30 1997-04-30 Verfahren und Vorrichtung zur Steuerung von Lasergeräten
DE19718137 1997-04-30
PCT/DE1998/001187 WO1998048975A2 (fr) 1997-04-30 1998-04-29 Procede et dispositif de commande d'appareils laser

Publications (1)

Publication Number Publication Date
EP0979157A2 true EP0979157A2 (fr) 2000-02-16

Family

ID=7828129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98932029A Withdrawn EP0979157A2 (fr) 1997-04-30 1998-04-29 Procede et dispositif de commande d'appareils laser

Country Status (3)

Country Link
EP (1) EP0979157A2 (fr)
DE (1) DE19718137A1 (fr)
WO (1) WO1998048975A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011085593A1 (de) 2011-11-02 2013-05-02 Trumpf Laser Gmbh + Co. Kg Laseranlage mit einer parallel zu einem Laserlichtkabel verlaufenden Datenverbindung zwischen Laser und Laserbearbeitungseinheit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4213424C2 (de) * 1991-04-26 1996-03-07 Matsushita Electric Works Ltd Vorrichtung zum wahlweisen Zuführen eines Laserstrahls an eine von mehreren Laser-Schweißstationen
JP3309997B2 (ja) * 1991-09-05 2002-07-29 株式会社日立製作所 複合処理装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9848975A2 *

Also Published As

Publication number Publication date
WO1998048975A3 (fr) 1999-02-04
DE19718137A1 (de) 1998-11-05
WO1998048975A2 (fr) 1998-11-05

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