WO1997019782A1 - Appareil d'usinage a laser - Google Patents

Appareil d'usinage a laser Download PDF

Info

Publication number
WO1997019782A1
WO1997019782A1 PCT/JP1996/003404 JP9603404W WO9719782A1 WO 1997019782 A1 WO1997019782 A1 WO 1997019782A1 JP 9603404 W JP9603404 W JP 9603404W WO 9719782 A1 WO9719782 A1 WO 9719782A1
Authority
WO
WIPO (PCT)
Prior art keywords
moving speed
output condition
output
speed
processing
Prior art date
Application number
PCT/JP1996/003404
Other languages
English (en)
Japanese (ja)
Inventor
Yoshinori Nakata
Kazuhiro Suzuki
Motohiko Sato
Hitoshi Matsuura
Original Assignee
Fanuc Ltd
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 Fanuc Ltd filed Critical Fanuc Ltd
Publication of WO1997019782A1 publication Critical patent/WO1997019782A1/fr

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
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • 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
    • G05B19/41—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 characterised by interpolation, e.g. the computation of intermediate points between programmed end points to define the path to be followed and the rate of travel along that path
    • G05B19/4103—Digital interpolation
    • 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
    • G05B2219/43—Speed, acceleration, deceleration control ADC
    • G05B2219/43147—Control power of tool as function of speed, velocity of movement
    • 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
    • G05B2219/45165—Laser machining

Definitions

  • the present invention relates to a type of laser processing apparatus that controls a beam output condition at the time of laser processing according to a moving speed of a processing head with respect to a workpiece.
  • the laser beam is irradiated for a long time in the decelerated area (low-speed section). At this time, if the output of the laser beam is maintained at the same power, the width of the processing is increased only in the low-speed part. In particular, excessive heat input occurs at the top of the corners, resulting in poor machining quality, such as the inability to sharpen the corners.
  • the laser beam output conditions for laser processing include pulse duty and pulse frequency in addition to output power.
  • beam output conditions such as pulse duty correspond to speed changes It was also used to change it.
  • a laser processing apparatus is configured such that a movement command value is input to a laser beam on a processing path of a processing head.
  • a moving speed calculating means for calculating and outputting the moving speed of the beam, and inputting the moving speed output from the moving speed calculating means, and values of two or more types of beam output conditions corresponding to the moving speed.
  • a beam output control means for controlling the laser oscillator based on the value of the beam output condition output by the output condition determining means.
  • the output condition determining means determines the beam output condition based on a relational expression between the moving speed and the value of the output condition. Is provided.
  • the output condition determining means has a data table in which the correspondence between the moving speed and at least one type of beam output condition is defined, and the moving speed is input. Then, referring to the data table and outputting the value of the output condition corresponding to the moving speed.
  • the present invention has the above-described configuration, it is possible to control a plurality of elements of the beam output condition in any combination in response to a change in the feed rate during laser processing.
  • the machining part is uniform and good and optimal machining results can be obtained.
  • FIG. 1 is a block diagram showing each element constituting the laser processing apparatus according to the present invention.
  • FIG. 2 is a schematic diagram showing one embodiment of a laser processing apparatus according to the present invention. Is a schematic diagram,
  • FIG. 3 is a diagram showing an example of a processing path when processing is performed by a laser processing apparatus.
  • Fig. 4 is a diagram showing the moving speed of the machining head when it moves on the machining path shown in Fig. 3,
  • Figure 5 shows the relationship between the moving speed of the processing head and the pulse frequency of the laser beam.
  • Fig. 6 shows the output power of the laser beam on the machining path shown in Fig. 3.
  • Fig. 7 is a diagram showing the pulse frequency of the laser beam on the machining path shown in Fig. 3.
  • FIG. 8 is a diagram showing an example of a data table in which the relationship between the moving speed of the processing head and the output power of the laser beam is determined.
  • FIG. 9 is a diagram showing the contents of the data table of FIG. 8 in a graph.
  • Fig. 10 shows the relationship between the position on the machining path and the moving speed in Fig. 4 replaced by the relationship between the position on the machining path and the output power of the laser beam using the data table shown in Fig. 8.
  • FIG. 10 shows the relationship between the position on the machining path and the moving speed in Fig. 4 replaced by the relationship between the position on the machining path and the output power of the laser beam using the data table shown in Fig. 8.
  • Preprocessing calculation means 2 decodes processing program 1 and moves Output command.
  • the interpolation means 3 performs an interpolation process on the movement command and outputs an interpolation pulse for each axis. Further, the interpolation means 3 calculates the relative moving speed F of the machining head 35 with respect to the workpiece from the interpolation pulse for each axis.
  • the servo amplifier 18 controls the rotation of the servomotor 32 of the laser beam machine 30 according to the interpolation pulse. There are as many servo amplifiers 18 and servo motors 32 as the number of axes. In the output condition determining means 4, a plurality of beam output condition values for the moving speed F are defined in advance.
  • the output power, the pulse frequency, and the value of the pulse duty are defined by the output power definition unit 4a, the pulse frequency definition unit 4b, and the pulse duty definition unit 4c, respectively.
  • the output condition determining means 4 determines the values of the output power M, the pulse duty Q, and the pulse frequency N according to the definition of each beam output condition based on the moving speed F calculated by the interpolation means 3.
  • To define each beam output condition use a beam output condition calculation formula that uses the moving speed as a variable, or use a data table that registers the correspondence between the moving speed and the set value of each beam output condition. And can be.
  • the output power is determined to be M (F)
  • the pulse duty is determined to be Q (F)
  • the pulse frequency is determined to be N (F).
  • the pulse duty is determined to be Q i, and the pulse frequency is determined to be N i.
  • the laser output control means 5 controls the beam output of the laser oscillator 20 according to the beam output conditions calculated by the output condition determining means 4.
  • the laser beam output from the laser oscillator 20 is applied to the work via the processing head 35.
  • a plurality of beam output conditions can be simultaneously controlled according to the moving speed during laser processing. Therefore, it is possible to obtain better processing quality in various situations than when one type of beam output condition is controlled.
  • the laser processing device includes a numerical controller (CNC) 10, a laser oscillator 20, and a laser processing machine 30.
  • CNC numerical controller
  • the laser processing device includes a numerical controller (CNC) 10, a laser oscillator 20, and a laser processing machine 30.
  • the CNC 10 is connected to the processor (CPU) 11 via the NOS 50 via the R ⁇ M 12, the nonvolatile memory 13, the RAM 14, and the I / O unit 15.
  • a manual input device with display screen (CRT MDI) 16 and servo amplifiers 17, 18, and 19 are connected to each other.
  • EPROM or EEPROM is used for R0M12, and the system program is stored.
  • the non-volatile memory 13 uses the CM0S that has been knocked down and stores machining programs and various parameters to be retained even after the power is turned off. Therefore, the processor 11 reads the machining program stored in the non-volatile memory 13 based on the system program stored in the ROM 12. To control the operation of the entire system.
  • the IZ ⁇ unit 15 converts the output control signal from the processor 11 and sends it to the laser oscillator 20.
  • the laser oscillator 20 emits a continuous or pulsed laser beam 21 in accordance with the output control signal.
  • the laser beam 21 is reflected by the bending mirror 22 and sent to the laser beam machine 30.
  • the CRT / MDI16 is used to interactively input various program data to the CNC10.
  • the laser processing machine 30 includes a processing machine body 34, a processing head 35 for irradiating the work 38 with the laser beam 21, and a table 37 to which the workpiece 38 is fixed.
  • the laser beam 21 introduced into the processing head 35 and condensed is applied to the work 38 from the nozzle 36.
  • the servo amplifiers 17, 18, and 19 are connected to the X-axis support motor 31 of the laser beam machine 30, the Y-axis servo motor 32, and the Z-axis servo motor 33, and are connected to the processor.
  • the axis control signal from the satellite 11 is transmitted to these satellites 31, 32, 33.
  • the laser machine body 34 is provided with an X-axis servomotor 31 for controlling the movement of the table 37 in the X-axis direction and a Y-axis servomotor 32 for controlling the movement of the table 37 in the Y-axis direction. .
  • a Z-axis servo motor 33 is provided for controlling the movement of the machining head 35 in the Z-axis direction. These servo motors 33, 32 and 33 are provided.
  • the CNC 1 It is connected to the servo amplifiers 17, 18 and 19 on the 0 side, respectively, and its rotation is controlled according to the axis control signal from the processor 11.
  • the table 37 and the processing head 35 move in accordance with the rotation of the sub-bodies 31, 32, and 33.
  • the laser beam 21 emitted from the nozzle 36 draws a trajectory on the work 38 in accordance with the movement of the table 37, and cuts the work 38 into a predetermined shape or welds along a predetermined path. Processing such as doing.
  • Fig. 3 shows an example of the processing path when processing with a laser processing device.
  • the spots 41 to 43 of the laser beam moving on the path 40 have their center positions moved in the order of point A-point B-point C.
  • the movement from point A to point B is linear. It makes a right angle turn at point B and moves straight from point B to point C. Therefore, it is necessary to reduce the speed at point B as compared with the movement before and after that point.
  • the speed of the irradiation spot (processing head 35) moving on the processing path 40 in FIG. 3 is represented in a graph as shown in FIG.
  • the horizontal axis indicates the center position of the spot on the machining path 40
  • the vertical axis indicates the moving speed when passing through that position. Shortly after passing point A, deceleration starts. At point B, the speed is lowest. Acceleration starts after passing point B, before point C But return to and speed. After that, pass point C while maintaining the speed.
  • the pulse frequency N (F) for the speed F is determined by the following formula.
  • N (F) / 3 F + N 0 (2)
  • the proportional constant / 3 is calculated by the following formula.
  • Q (F) r F + Q 0... ⁇ (3)
  • the proportionality constant r is calculated by the following equation.
  • FIG. 6 shows the relationship between the position on the machining path and the moving speed F in FIG. 4 replaced with the relationship between the position on the machining path and the output power using the above equation (1).
  • the horizontal axis is the position on the movement route
  • the vertical axis is the output power Q.
  • FIG. 7 shows the relationship between the position on the machining path and the moving speed F in FIG. 4 replaced with the relationship between the position on the machining path and the pulse frequency using the above equation (2).
  • the horizontal axis is the position on the movement path, and the vertical axis is the pulse frequency N.
  • the pulse frequency decreases at the same time.
  • the pulse frequency becomes minimum and then increases.
  • the pulse frequency returns to the original value.
  • the pulse duty changes similarly to the pulse frequency.
  • a data table can be prepared in advance, and the value of each condition can be obtained from the data table.
  • FIG. 8 is a diagram showing an example of a data table.
  • the data table has two items: “speed” and “element data”.
  • speed threshold values (F 0, F 1, F 2,..., F 5) of the speed at which the output condition should be changed are set.
  • the “element data” includes the output power (M 0, M l, M 2,%) Until the corresponding “speed” threshold is reached.
  • This data table is set individually for each element of the beam output condition.
  • FIG. 9 is a diagram showing the relationship between the speed F and the output power M when a data table as shown in FIG. 8 is used.
  • output power M l when the speed is F 0 ⁇ F ⁇ F 1
  • output power M 4 when the speed is F 4 ⁇ F ⁇ F 5 The output power is M5.
  • FIG. 10 shows the relationship between the position and the output power when the beam output condition control for the movement shown in FIG. 3 is performed using such a data table. That is, the relationship between the position and the output power M in FIG. 4 is replaced by the relationship between the position and the output power M based on the relationship between the speed F and the output power M in FIG. It is.
  • the horizontal axis is the position of the processing head, and the vertical axis is the output power M.
  • the output power gradually decreases and becomes the lowest at the point B. And, after passing point B, it gradually becomes stronger.
  • each value changes according to the moving speed.
  • the beam output condition can be obtained by simple comparison of data, so that the load on the processor of the numerical controller is reduced.

Landscapes

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

Abstract

Un interpolateur (3) produit en sortie une impulsion d'interpolation pour chaque axe en réponse à une instruction de mouvement. La vitesse F d'une tête d'usinage (35) se déplaçant le long d'un chemin d'usinage est calculée à partir de l'impulsion (vitesse) d'interpolation pour chaque axe, et elle est transmise à un dispositif (4) de détermination des conditions de sortie. Sur la base de la vitesse F, le dispositif (4) de détermination des conditions de sortie calcule la puissance de sortie correspondante M(F), la fréquence d'impulsion N(F) et le rapport cyclique des impulsions Q(F) et les produits en sortie. De ce fait, le faisceau provenant d'un oscillateur laser (20) est commandé par les conditions en sortie de M(F), N(F) et Q(F).
PCT/JP1996/003404 1995-11-27 1996-11-20 Appareil d'usinage a laser WO1997019782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7307341A JPH09150282A (ja) 1995-11-27 1995-11-27 レーザ加工方式
JP7/307341 1995-11-27

Publications (1)

Publication Number Publication Date
WO1997019782A1 true WO1997019782A1 (fr) 1997-06-05

Family

ID=17967959

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/003404 WO1997019782A1 (fr) 1995-11-27 1996-11-20 Appareil d'usinage a laser

Country Status (2)

Country Link
JP (1) JPH09150282A (fr)
WO (1) WO1997019782A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102375429A (zh) * 2010-08-06 2012-03-14 发那科株式会社 向加工点供给能量或物质的加工机中的加工信息取得装置
WO2022176247A1 (fr) * 2021-02-19 2022-08-25 オムロン株式会社 Système de commande et procédé de commande

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1736272B9 (fr) * 2005-06-21 2009-08-12 Fameccanica.Data S.p.A. Procédé et dispositif de découpe par laser d'articles, en particulier d'articles d'hygiène, avec un diamètre de foculisation du faisceau laser compris entre 0.1 et 0.3 mm
JP4558775B2 (ja) 2007-10-23 2010-10-06 富士通株式会社 加工装置および加工方法並びに板ばねの製造方法
JP6636753B2 (ja) 2015-09-03 2020-01-29 ファナック株式会社 姿勢による加工条件制御が可能な数値制御装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61226197A (ja) * 1985-03-29 1986-10-08 Mitsubishi Electric Corp レ−ザ加工制御装置
JPS62104088A (ja) * 1985-10-30 1987-05-14 Nippei Toyama Corp レ−ザ出力制御装置
JPH0647571A (ja) * 1991-02-08 1994-02-22 Yamazaki Mazak Corp レーザ加工機の数値制御方法
JPH07303979A (ja) * 1994-05-11 1995-11-21 Nec Corp レーザ加工装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61226197A (ja) * 1985-03-29 1986-10-08 Mitsubishi Electric Corp レ−ザ加工制御装置
JPS62104088A (ja) * 1985-10-30 1987-05-14 Nippei Toyama Corp レ−ザ出力制御装置
JPH0647571A (ja) * 1991-02-08 1994-02-22 Yamazaki Mazak Corp レーザ加工機の数値制御方法
JPH07303979A (ja) * 1994-05-11 1995-11-21 Nec Corp レーザ加工装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102375429A (zh) * 2010-08-06 2012-03-14 发那科株式会社 向加工点供给能量或物质的加工机中的加工信息取得装置
WO2022176247A1 (fr) * 2021-02-19 2022-08-25 オムロン株式会社 Système de commande et procédé de commande

Also Published As

Publication number Publication date
JPH09150282A (ja) 1997-06-10

Similar Documents

Publication Publication Date Title
US6177648B1 (en) Steered laser beam system with laser power control
EP0917033A2 (fr) Commande de machine
EP0187934A2 (fr) Dispositif pour traiter des pièces au moyen d'un rayon laser sortant d'une tête de laser
CN106493469B (zh) 能够根据姿势来控制加工条件的数值控制装置
US4994978A (en) Acceleration/deceleration control apparatus
JP3768730B2 (ja) レーザ加工機およびその数値制御装置ならびにレーザ加工機の制御方法
WO1997019782A1 (fr) Appareil d'usinage a laser
WO1994000270A1 (fr) Laser de decoupe
JPH05138374A (ja) レーザー加工機の出力制御装置
WO1997012717A1 (fr) Dispositif d'usinage a laser et procede associe
US5239159A (en) Nozzle movement system for laser machining equipment
EP0305532B1 (fr) Regulateur de l'oscillation d'un laser
US7012215B2 (en) Laser machining apparatus
US20040112876A1 (en) Laser beam machine and laser beam machining method
WO1988008354A1 (fr) Procede de regulation de la puissance d'une machine-outil a laser avec unite de commande numerique
JPH09108863A (ja) レーザ加工方式
US5004889A (en) Laser power controlling method
JPH07210225A (ja) 数値制御装置
JPH02179373A (ja) レーザ加工機用ｎｃ制御装置
JPH04237582A (ja) レーザ加工機
JP3433999B2 (ja) レーザ加工装置
JPH06297058A (ja) 板材加工機のテーブル制御装置
JPH07132385A (ja) レーザ加工装置
JPH08150540A (ja) 工作機械の干渉防止装置
JP2686286B2 (ja) ３次元レーザ制御装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase