WO2020008780A1 - Machine de coupe et procédé de coupe - Google Patents

Machine de coupe et procédé de coupe Download PDF

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Publication number
WO2020008780A1
WO2020008780A1 PCT/JP2019/022106 JP2019022106W WO2020008780A1 WO 2020008780 A1 WO2020008780 A1 WO 2020008780A1 JP 2019022106 W JP2019022106 W JP 2019022106W WO 2020008780 A1 WO2020008780 A1 WO 2020008780A1
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WO
WIPO (PCT)
Prior art keywords
tool
cutting
processing
diameter correction
path
Prior art date
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PCT/JP2019/022106
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English (en)
Japanese (ja)
Inventor
岳大 永山
和宏 菅野
Original Assignee
株式会社アマダホールディングス
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Application filed by 株式会社アマダホールディングス filed Critical 株式会社アマダホールディングス
Priority to JP2019554704A priority Critical patent/JP6719683B2/ja
Publication of WO2020008780A1 publication Critical patent/WO2020008780A1/fr

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    • 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
    • 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
    • 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
    • B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
    • 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
    • B23K26/36—Removing material
    • 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
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • 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
    • G05B19/4093—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 part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine

Definitions

  • the present disclosure relates to a cutting machine such as a laser machine for irradiating a processing object by irradiating a laser beam and a cutting method.
  • a laser processing machine that processes a processing object by irradiating a laser beam to produce a product having a predetermined shape is widely used.
  • the laser processing machine cuts a processing target by tool diameter correction in consideration of a cutting amount by a laser beam so that a product is manufactured with a predetermined shape.
  • Patent Literature 1 describes an example of a laser processing machine that cuts a processing target object by correcting a tool diameter.
  • the laser beam in a state where the relative position between a nozzle that emits a laser beam and a processing table on which a processing object is mounted is fixed, the laser beam usually has a circular shape, so that the cutting trace also has a circular shape. .
  • the cutting trace Even in a machining center provided with a plurality of types of rotary tools, the cutting trace usually has a circular shape when the position coordinates of the rotary tools are fixed.
  • the cutting trace usually has a circular shape in a state where the position coordinates where high-pressure water is injected are fixed. Accordingly, the tool diameter correction is based on the premise that the cutting trace in a state where the position coordinates of the cutting tool such as the nozzle, the rotary tool, and the high-pressure water is fixed is circular.
  • a cutting machine such as a laser beam machine sets a radius of a cutting trace by a cutting tool or a half width of a cutting trace as a tool diameter correction amount, shifts the tool by the tool diameter correction amount, and shifts a workpiece.
  • the trajectory during cutting is controlled.
  • tool diameter correction does not correspond to a case where a cutting trace is non-circular.
  • One or more embodiments include a cutting machine capable of accurately correcting the tool diameter of a cutting tool, even if a cutting trace in a state where the position coordinates of the cutting tool is fixed is non-circular;
  • An object is to provide a cutting method.
  • a processing machine body for cutting a processing object
  • an NC device for controlling the processing machine body, wherein the NC device includes the processing object.
  • the tool diameter of a cutting tool for machining the object Based on a machining program and machining conditions set based on product shape information including dimensions and shape of the final machined product obtained by machining, the tool diameter of a cutting tool for machining the object to be machined.
  • a tool diameter correction amount calculating unit for generating tool diameter correction information for correcting, and generating a tool diameter correction control signal including cutting correction conditions based on the processing program, the processing conditions, and the tool diameter correction information.
  • the tool diameter correction amount calculation unit includes a plurality of machining conditions included in the machining conditions.
  • a cutting machine that recognizes a tool path and generates tool diameter correction information including the plurality of tool paths is provided.
  • the processing target is set based on product shape information including dimensions and a shape of a final processed product obtained by cutting the processing target, and the processing target is cut.
  • a machining condition and a machining program which corresponds to a cutting tool for machining, and includes cutting tool information for changing a tool trajectory having a non-circular shape during cutting, a tool diameter of the tool trajectory Generating tool diameter correction information for correcting the tool diameter correction control signal including cutting processing correction conditions based on the processing program, the processing conditions, and the tool diameter correction information;
  • a drive control signal is generated based on the control signal, the tool path is controlled based on the drive control signal, and cutting tool information for changing the tool path during cutting to the machining condition is provided. If there are, recognizes a plurality of tool path contained in the working condition, cutting method for generating a tool diameter correction information including a plurality of tool path is provided.
  • the tool diameter of the cutting tool can be accurately determined. It can be corrected well.
  • FIG. 1 is a diagram illustrating an example of the overall configuration of a cutting machine according to one or more embodiments.
  • FIG. 2 is a diagram illustrating a relationship between a nozzle and a tool path.
  • FIG. 3 is a diagram illustrating a configuration example of a tool path control unit.
  • FIG. 4 is a diagram showing a state in which the tool trajectory is changed under the condition without switching and interpolation during cutting.
  • FIG. 5 is a diagram illustrating a state in which the tool trajectory is changed under the condition that there is switching interpolation during cutting.
  • FIG. 6 is a flowchart illustrating an example of a cutting method according to one or more embodiments.
  • the cutting machine 1 includes a laser oscillator 10, a machine body 100, and an NC device (numerical control device) 200.
  • the NC device 200 controls the laser oscillator 10 and the processing machine main body 100.
  • the laser oscillator 10 generates and emits a laser beam.
  • the laser beam emitted from the laser oscillator 10 is transmitted to the processing machine main body 100 via the process fiber 11.
  • the processing machine body 100 cuts the processing object W by irradiating the processing object W with a laser beam and changing the relative position between the processing object W and the beam spot of the laser beam.
  • the laser oscillator 10 a laser oscillator that amplifies the excitation light emitted from the laser diode and emits a laser beam of a predetermined wavelength, or a laser oscillator that directly uses the laser beam emitted from the laser diode is preferable.
  • the laser oscillator 10 is, for example, a solid-state laser oscillator, a fiber laser oscillator, a disk laser oscillator, or a direct diode laser oscillator (DDL oscillator).
  • the laser oscillator 10 emits a 1 ⁇ m band laser beam having a wavelength of 900 nm to 1100 nm.
  • the fiber laser oscillator emits a laser beam having a wavelength of 1060 nm to 1080 nm
  • the DDL oscillator emits a laser beam having a wavelength of 910 nm to 950 nm.
  • the processing machine main body 100 includes a processing table 101 on which a processing target object W is placed, a gate-shaped X-axis carriage 102, a Y-axis carriage 103, a processing unit 104, and a tool path control unit 300.
  • the workpiece W is a sheet metal made of, for example, stainless steel.
  • the workpiece may be an iron-based sheet metal other than stainless steel, or may be an aluminum, aluminum alloy, copper steel, or other sheet metal.
  • the laser beam emitted from the laser oscillator 10 is transmitted to the processing unit 104 of the processing machine main body 100 via the process fiber 11.
  • the tool trajectory controller 300 is housed inside the processing unit 104.
  • the X-axis carriage 102 is configured to be movable on the processing table 101 in the X-axis direction.
  • the Y-axis carriage 103 is configured to be movable on the X-axis carriage 102 in the Y-axis direction orthogonal to the X-axis.
  • the X-axis carriage 102 and the Y-axis carriage 103 move the processing unit 104 in the X-axis direction, the Y-axis direction, or any combined direction of the X-axis and the Y-axis along the surface of the workpiece W. Functions as a mechanism.
  • the processing unit main body 100 may be configured such that the processing unit 104 has a fixed position and the processing object W moves. .
  • the processing machine body 100 only needs to have a moving mechanism that relatively moves the processing unit 104 with respect to the surface of the processing target object W.
  • a nozzle 106 is attached to the processing unit 104.
  • a circular opening 105 is formed at the tip of the nozzle 106.
  • the laser beam transmitted to the processing unit 104 is emitted from the opening 105 of the nozzle 106 and irradiates the workpiece W.
  • the processing unit 104 is supplied with an assist gas such as nitrogen or air.
  • the assist gas may be oxygen, and the mixing ratio between nitrogen and oxygen can be arbitrarily set depending on whether the purpose is to suppress oxidation or to utilize heat of oxidation reaction.
  • the laser beam is applied to the workpiece W from the opening 105, and the assist gas is blown from the opening 105 onto the workpiece W.
  • the assist gas discharges a melt within the kerf width where the workpiece W has melted.
  • the tool trajectory controller 300 functions as a beam vibration mechanism that vibrates the laser beam emitted from the opening 105 while traveling in the processing unit 104 in a non-circular vibration pattern.
  • the tool unit control unit 300 causes the laser beam to vibrate in a non-circular vibration pattern, so that the processing unit 104 cuts the processing target object W using the non-circular tool path.
  • a specific configuration example of the tool path control unit 300 and a method in which the tool path control unit 300 vibrates the beam spot of the laser beam in a non-circular vibration pattern will be described later.
  • the tool trajectory is a figure depicting a trajectory of a beam made by beam vibration oscillated in a non-circular vibration pattern within a predetermined time, and indicates a vibrating tool shape.
  • the circular laser beam itself emitted from the nozzle 106 is a cutting tool, and the beam radius is used as the tool diameter correction.
  • the tool trajectory of the figure drawn in the vibration pattern is referred to as the cutting tool. I do.
  • the cutting trace in a state where the relative position between the nozzle 106 and the processing table 101 is fixed corresponds to the tool path.
  • the CAD (Computer Aided Design) device 20 generates product shape data (CAD data) SD based on product shape information including dimensions and shapes of the final processed product obtained by cutting the workpiece W, and performs CAM. (Computer ⁇ Aided ⁇ Manufacturing) Output to the device 21.
  • the CAM device 21 generates, based on the product shape data SD, a machining program (NC data) PP for the cutting machine 1 to machine the workpiece W, and specifies a machining condition CP. That is, the processing program PP and the processing conditions CP are set based on product shape information including dimensions and shapes of the final processed product.
  • the machining program PP includes G41 (left tool radius correction) for controlling the trajectory of the cutting tool by shifting the tool to the left side in the cutting processing direction by the tool diameter correction amount, or the tool diameter on the right side in the cutting processing direction.
  • G41 left tool radius correction
  • G42 right tool diameter correction
  • the CAM device 21 specifies a tool path corresponding to a cutting tool as the processing condition CP.
  • the tool path has, for example, a non-circular shape.
  • the CAM device 21 can specify a plurality of tool trajectories having different shapes or different tool diameters.
  • the processing condition CP includes cutting tool information for changing a tool path during cutting.
  • the processing condition CP includes processing target information in which material parameters such as the material and thickness of the processing target W are specified.
  • the processing conditions CP include processing parameters such as the output of the laser beam, the processing speed, the diameter of the opening 105 of the nozzle 106 (nozzle diameter), and cutting processing information such as assist gas conditions. That is, the processing condition CP includes cutting tool information such as a tool path, processing target information, and cutting processing information.
  • the CAM device 21 outputs the machining program PP and the machining condition CP to the NC device 200 of the cutting machine 1.
  • the NC device 200 controls the laser oscillator 10 based on the processing program PP and the processing conditions CP.
  • the NC device 200 moves the nozzle 106 to a target position by controlling the processing machine main body 100 to drive the X-axis carriage 102 and the Y-axis carriage 103 based on the processing program PP and the processing conditions CP.
  • the NC apparatus 200 controls the path of the beam spot of the laser beam emitted from the opening 105 of the nozzle 106 by controlling the tool path controller 300 based on the processing program PP and the processing conditions CP.
  • the trajectory of the beam spot corresponds to the tool trajectory.
  • the NC apparatus 200 includes a tool diameter correction amount calculation unit 201, a machining path calculation unit 202, and a drive control unit 203.
  • the machining program PP and the machining conditions CP are input from the CAM device 21 to the tool diameter correction amount computing unit 201 and the machining trajectory computing unit 202.
  • the tool diameter correction amount calculation unit 201 generates tool diameter correction information TC for correcting the tool diameter of the cutting tool for cutting the workpiece W based on the processing program PP and the processing conditions CP.
  • the tool diameter correction information TC will be described with reference to FIG. FIG. 2 shows a trajectory (tool trajectory) of a beam spot of a laser beam applied to the workpiece W from the inside of the nozzle 106 via the opening 105.
  • the tool diameter correction amount calculation unit 201 recognizes the tool path TP included in the processing condition CP.
  • the tool diameter correction amount calculation unit 201 generates tool diameter correction information TC based on the recognized tool path TP, the path NP of the nozzle 106 (hereinafter, referred to as a nozzle path NP), and the cutting direction DT. .
  • the tool path TP corresponds to a cutting tool for cutting the workpiece W.
  • the shape of the tool path TP corresponds to the shape of the cutting tool.
  • the tool path TP has, for example, a non-circular shape.
  • the tool diameter correction information TC includes a control center point CL on the tool path TP, machining surface formation positions MPL and MPR, tool diameter correction values MVLL and MVLR, and offset values SVLL and SVLR.
  • the tool diameter correction information TC includes a center point CN of the nozzle 106 in the nozzle trajectory NP (hereinafter, referred to as a nozzle center point CN), tool diameter correction values MVNL and MVNR, and offset values SVNL and SVNR.
  • the control center point CL corresponds to the center of the laser beam in the case of tool diameter correction in general laser processing.
  • the cutting tool is controlled with respect to the cutting line (cutting position) when the cutting line is a boundary between the cutting tool and the product. It is the center position.
  • the nozzle locus NP is, specifically, a locus of the nozzle center point CN.
  • the center point CN of the nozzle 106 coincides with the center point of the opening 105.
  • CCCCNa and CCNb shown in FIG. 2 indicate the center lines of the nozzle 106.
  • the center line CCNa is parallel to the traveling direction DT, and the center line CCNb is perpendicular to the traveling direction DT.
  • BS shown in FIG. 2 indicates a beam spot of the laser beam moving on the tool path TP.
  • FIG. 2 shows, as an example of a non-circular shape, a tool path TP of a vibration pattern that vibrates the beam spot BS so that the beam spot BS draws the letter C.
  • the vibration pattern of the tool path TP may be any free shape including a non-circular shape.
  • the tool path TP corresponds to the path of the beam spot BS of the laser beam.
  • the beam spot BS reciprocates on the tool path TP.
  • the beam spot BS may move periodically if it has a non-circular shape.
  • the processing surface formation positions MPL and MPR correspond to positions where the distance from the center line CCLa that passes through the control center point CL and is parallel to the traveling direction DT to the beam spot BS in the tool path TP is maximum.
  • the processing surface formation positions MPL and MPR are positions where a processing surface is formed on the processing target object W when the tool path TP moves in the cutting direction DT. That is, the processing surface formation positions MPL and MPR are positions where the tool diameter becomes maximum on the tool path TP.
  • the processing surface formation positions MPL and MPR correspond to positions where the distance from the center line CCNa that passes through the nozzle center point CN and is parallel to the traveling direction DT in the nozzle locus NP is maximum. That is, the processing surface formation positions MPL and MPR are positions where the tool diameter becomes maximum on the nozzle locus NP.
  • the processing surface formation position MPL is a parameter in the left tool diameter correction
  • the processing surface formation position MPR is a parameter in the right tool diameter correction.
  • the tool diameter correction values MVLL and MVLR in the tool path TP correspond to distances from the center line CCLa to the machining surface forming positions MPL and MPR.
  • the tool diameter correction values MVLL and MVLR on the tool path TP correspond to the tool diameter on the tool path TP.
  • the tool diameter correction values MVNL and MVNR in the nozzle trajectory NP correspond to distances from the center line CCNa to the processing surface forming positions MPL and MPR.
  • the tool diameter correction values MVNL and MVNR on the nozzle path NP correspond to the tool diameter on the nozzle path NP.
  • the tool diameter correction values MVLL and MVNL are parameters for left tool diameter correction
  • the tool diameter correction values MVLR and MVNR are parameters for right tool diameter correction.
  • the offset values SVLL and SVLR in the tool path TP correspond to distances from the center line CCLb passing through the control center point CL and perpendicular to the traveling direction DT to the machining surface forming positions MPL and MPR.
  • the offset values SVNL and SVNR in the nozzle trajectory NP correspond to the distances from the center line CCNb passing through the nozzle center point CN and perpendicular to the traveling direction DT to the processing surface forming positions MPL and MPR.
  • the offset values SVLL and SVNL are parameters for correcting the left tool diameter
  • the offset values SVLR and SVNR are parameters for correcting the right tool diameter.
  • the tool diameter correction amount calculation unit 201 recognizes the tool path TP included in the processing condition CP, and performs correction based on the tool path TP and correction based on the nozzle path NP based on the processing program PP and the processing condition CP. And tool diameter correction information TC including the information.
  • the tool diameter correction amount calculation unit 201 outputs the tool diameter correction information TC to the machining path calculation unit 202. Further, the tool diameter correction amount calculation unit 201 outputs tool diameter correction information TC including both correction information of the left tool diameter correction and the right tool diameter correction to the machining path calculation unit 202.
  • the machining trajectory calculation unit 202 receives the machining program PP and the machining condition CP from the CAM device 21, and receives the tool radius correction information TC from the tool radius correction amount computation unit 201.
  • the processing trajectory calculation unit 202 translates a G code included in the processing program PP. Note that the machining program PP may include a robot language or the like instead of the G code.
  • the processing path calculation unit 202 Based on the translation result, the processing program PP, the processing condition CP, and the tool diameter correction information TC, the processing path calculation unit 202 performs the cutting processing with the left tool diameter correction using the nozzle path NP, or uses the nozzle path NP. Either cutting with the right tool radius correction using the tool path TP, cutting with the left tool diameter correction using the tool path TP, or cutting with the right tool diameter correction using the tool path TP Determine the processing correction conditions.
  • the machining trajectory calculation unit 202 generates the tool radius correction control signal TS based on the translation result, the machining program PP, the machining condition CP, the tool radius correction information TC, and the determined cutting compensation condition.
  • the processing path calculation unit 202 outputs a tool diameter correction control signal TS to the drive control unit 203.
  • the drive control unit 203 generates a drive control signal CS for controlling the processing machine main body 100 based on the tool diameter correction control signal TS.
  • the drive control unit 203 outputs a drive control signal CS to the processing machine main body 100.
  • the drive control unit 203 drives based on the tool path TP, the control center point CL in the tool path TP, the tool diameter correction value MVLL, and the offset value SVLL.
  • a control signal CS is generated.
  • the drive control unit 203 drives based on the tool path TP, the control center point CL in the tool path TP, the tool diameter correction value MVLR, and the offset value SVLR.
  • a control signal CS is generated.
  • the drive control unit 203 drives based on the nozzle path NP, the nozzle center point CN in the nozzle path NP, the tool diameter correction value MVNL, and the offset value SVNL.
  • a control signal CS is generated.
  • the drive control unit 203 drives based on the nozzle path NP, the nozzle center point CN in the nozzle path NP, the tool diameter correction value MVNR, and the offset value SVNR.
  • a control signal CS is generated.
  • the drive control unit 203 controls the tool path control unit 300 of the processing machine body 100 by the drive control signal CS.
  • the tool path control unit 300 controls the path of the beam spot BS of the laser beam emitted from the opening 105 of the nozzle 106 based on the drive control signal CS.
  • the tool trajectory controller 300 is housed inside the processing unit 104.
  • the tool trajectory controller 300 includes a collimator lens 331, a galvano scanner unit 340, a bend mirror 334, and a focusing lens 335.
  • the collimator lens 331 converts the laser beam emitted from the process fiber 11 into parallel light (collimated light).
  • the galvano scanner unit 340 includes a scan mirror 341 (first scan mirror), a driving unit 342 (first drive unit) that drives the scan mirror 341 to rotate, a scan mirror 343 (second scan mirror), and a scan.
  • a driving unit 344 (second driving unit) that drives the mirror 343 to rotate.
  • the drive unit 342 can reciprocally drive the scan mirror 341 in a predetermined direction (for example, the X direction) within a predetermined angle range under the control of the drive control unit 203.
  • the scan mirror 341 reflects the laser beam converted into parallel light by the collimator lens 321 toward the scan mirror 343.
  • the drive unit 344 can reciprocally drive the scan mirror 343 in a predetermined angle range in a direction (for example, the Y direction) different from the drive direction of the scan mirror 341 under the control of the drive control unit 203.
  • the scan mirror 343 reflects the laser beam reflected by the scan mirror 341 toward the bend mirror 334.
  • the bend mirror 334 reflects the laser beam reflected by the scan mirror 343 downward in the Z-axis direction perpendicular to the X-axis and the Y-axis.
  • the converging lens 335 converges the laser beam reflected by the bend mirror 334 and irradiates the object W to be processed.
  • the galvano scanner unit 340 can make the cutting trace various types of non-circular shapes by reciprocating one or both of the scan mirror 341 and the scan mirror 343 at a high speed of, for example, 1000 Hz or more. That is, by converging a laser beam having a predetermined light intensity or more at a plurality of locations per unit time, it is possible to make various types of non-circular tool shapes in contact with the workpiece W and substantially contributing to machining. Can be any.
  • the processing conditions CP include a plurality of tool paths TP corresponding to a plurality of cutting tools, and tool path switching information including timing (switching time or position) for switching the tool path TP and a switching method.
  • the plurality of tool paths TP have different shapes or different tool diameters.
  • the tool trajectory switching information includes, for example, a parameter with no switching interpolation or with switching interpolation as a switching method.
  • the tool diameter correction amount calculation unit 201 recognizes whether or not the machining condition CP includes tool path switching information. If the processing condition CP does not include the tool path switching information, the tool diameter correction amount calculation unit 201 recognizes the tool path TP included in the processing condition CP. When the tool path switching information is included in the machining condition CP, the tool diameter correction amount calculation unit 201 recognizes a plurality of tool paths TP included in the tool path switching information.
  • the tool diameter correction amount calculation unit 201 generates tool diameter correction information TC having the above-described tool path switching information including a plurality of tool paths TP based on the processing conditions CP. Further, based on the machining program PP and the machining conditions CP, the tool diameter correction amount calculation unit 201 calculates machining surface forming positions MPL and MPR that are switching reference positions of a plurality of tool trajectories TP, and control center in each tool trajectory TP. Tool diameter correction information TC having tool path change information including the point CL, the tool diameter correction values MVLL and MVLR, and the offset values SVLL and SVLR is generated. That is, the tool diameter correction information TC includes the above-described tool path switching information and tool path change information.
  • FIG. 4 shows a case where the machining condition CP includes cutting tool information for switching the tool path TP11 to the tool path TP12 at the switching time t1 and for switching the tool path TP12 to the tool path TP11 at the switching time t2.
  • FIG. 4 shows a case where the tool diameter correction information TC includes a parameter without switching interpolation.
  • FIG. 4 shows a case where the offset values SVLL and SVLR are 0 for easy understanding.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP11 selected in the period up to the switching time t1, a control center point CL11 on the tool path TP11, machining surface formation positions MPL11 and MPR11, and tool diameter correction values MVLL11 and MVLR11. And tool diameter correction information TC including offset values SVLL11 and SVLR11.
  • the processing surface formation positions MPL11 and MPR11 are switching reference positions for the tool path TP11.
  • the offset values SVLL11 and SVLR11 correspond to the offset values SVLL and SVLR shown in FIG.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP12 selected in a period from the switching time t1 to the switching time t2, a control center point CL12 in the tool path TP12, machining surface formation positions MPL12 and MPR12, and tool diameter correction.
  • the tool diameter correction information TC including the values MVLL12 and MVLR12 and the offset values SVLL12 and SVLR12 is generated.
  • the processing surface forming positions MPL12 and MPR12 are switching reference positions for the cutting tool CT2.
  • the offset values SVLL12 and SVLR12 correspond to the offset values SVLL and SVLR shown in FIG.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP11 selected in a period after the switching time point t2, a control center point CL11 on the tool path TP11, machining surface formation positions MPL11 and MPR11, and tool diameter correction values MVLL11 and MVLR11. And tool diameter correction information TC including offset values SVLL11 and SVLR11. The tool diameter correction amount calculation unit 201 outputs the tool diameter correction information TC to the machining trajectory calculation unit 202.
  • the processing locus calculation unit 202 translates the G code included in the processing program PP. Based on the translation result, the processing program PP, the processing condition CP, and the tool diameter correction information TC, the processing path calculation unit 202 performs the cutting processing with the left tool diameter correction using the nozzle path NP, or uses the nozzle path NP. Either cutting with the right tool radius correction using the tool path TP, cutting with the left tool diameter correction using the tool path TP, or cutting with the right tool diameter correction using the tool path TP Determine the processing correction conditions.
  • the processing path calculation unit 202 determines the processing surface forming position MPL11 and the processing surface at the switching time t1 based on the tool diameter correction information TC.
  • a tool diameter correction control signal TS including first switching information for switching the tool path TP11 to the tool path TP12 by matching the formation position MPL12 is generated.
  • the processing locus calculation unit 202 also generates second switching information for switching the control center point CL11, the tool diameter correction value MVLL11, and the offset value SVLL11 to the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12. Is generated.
  • the processing path calculation unit 202 Based on the tool diameter correction information TC, the processing path calculation unit 202 matches the processing surface formation position MPL12 with the processing surface formation position MPL11 at the switching time t2, and switches the tool path TP12 to the tool path TP11.
  • a tool diameter correction control signal TS including the switching information of No. 3 is generated.
  • the processing trajectory calculation unit 202 outputs fourth switching information for switching the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12 to the control center point CL11, the tool diameter correction value MVLL11, and the offset value SVLL11. Is generated. That is, when it is determined that the cutting is performed by the left tool diameter correction using the tool path TP, the tool diameter correction amount calculation unit 201 generates the tool diameter correction control signal TS including the first to fourth switching information. .
  • the machining trajectory calculation unit 202 outputs the tool diameter correction control signal TS to the drive control unit 203.
  • the drive control unit 203 generates a drive control signal CS based on the tool diameter correction control signal TS.
  • the drive control unit 203 controls the processing machine main body 100 based on the drive control signal CS.
  • the processing machine body 100 controls the nozzle trajectory NP by driving the X-axis carriage 102 and the Y-axis carriage 103 based on the drive control signal CS. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control section 300 based on the drive control signal CS.
  • the processing machine main body 100 matches the processing surface formation position MPL11 with the processing surface formation position MPL12 at the switching time t1, and sets the tool path TP11 to the tool path TP12. Switch instantly.
  • the processing machine body 100 changes the control center point CL11, the tool diameter correction value MVLL11, and the offset value SVLL11 to the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12 at the switching timing.
  • the processing machine main body 100 matches the processing surface formation position MPL12 with the processing surface formation position MPL11 at the switching time t2, and changes the tool path TP12 to the tool path TP11. Switch instantly. Further, the processing machine body 100 changes the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12 at the switching timing to the control center point CL11, the tool diameter correction value MVLL11, and the offset value SVLL11. Execute
  • FIG. 5 shows a case where the machining conditions CP include cutting tool information for switching the tool path TP11 to the tool path TP12 at the switching time t1 and for switching the tool path TP12 to the tool path TP11 at the switching time t2.
  • FIG. 5 shows a case where the tool diameter correction information TC includes a parameter with switching interpolation.
  • FIG. 5 shows a case where the offset values SVLL and SVLR are 0 for easy understanding.
  • the tool diameter correction amount calculation unit 201 sets a tool path interpolation period SP11 for the switching time point t1.
  • the tool path interpolation period SP11 is a predetermined period up to the switching time t1.
  • the tool radius correction amount calculation unit 201 extracts feature points of the tool path TP11 and the tool path TP12.
  • the tool diameter correction amount calculation unit 201 sets a characteristic curve based on the extracted characteristic points.
  • the tool diameter correction amount calculation unit 201 sets the tool path TP112 in the tool path interpolation period SP11 while keeping the ratio between the constituent points of the characteristic curve constant.
  • the tool path TP112 is an interpolation tool path that interpolates the tool path TP11 and the tool path TP12 in order to switch the tool path TP11 and the tool path TP12 stepwise.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP11 selected in the period up to the switching time t1, a control center point CL11 on the tool path TP11, machining surface formation positions MPL11 and MPR11, and tool diameter correction values MVLL11 and MVLR11. And tool diameter correction information TC including offset values SVLL11 and SVLR11.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP112 set in the tool path interpolation period SP11, a control center point CL112 in the tool path TP112, machining surface formation positions MPL112 and MPR112, tool diameter correction values MVLL112 and MVLR112, ,
  • the tool diameter correction information TC including the offset values SVLL112 and SVLR112.
  • the offset values SVLL112 and SVLR112 correspond to the offset values SVLL and SVLR shown in FIG.
  • the tool diameter correction amount calculation unit 201 sets the tool path interpolation period SP12 for the switching time point t2.
  • the tool path interpolation period SP12 is a predetermined period up to the switching time point t2.
  • the tool radius correction amount calculation unit 201 extracts feature points of the tool path TP12 and the tool path TP11.
  • the tool diameter correction amount calculation unit 201 sets a characteristic curve based on the extracted characteristic points.
  • the tool diameter correction amount calculation unit 201 sets the tool path TP121 in the tool path interpolation period SP12 while keeping the ratio between the constituent points of the characteristic curve constant.
  • the tool path TP121 is an interpolation tool path that interpolates the tool path TP12 and the tool path TP11 in order to switch between the tool path TP21 and the tool path TP11 in a stepwise manner.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP12 selected in a period from the switching time t1 to the switching time t2, a control center point CL12 in the tool path TP12, machining surface formation positions MPL12 and MPR12, and tool diameter correction.
  • the tool diameter correction information TC including the values MVLL12 and MVLR12 and the offset values SVLL12 and SVLR12 is generated.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP121 set in the tool path interpolation period SP12, a control center point CL121 in the tool path TP121, machining surface formation positions MPL121 and MPR121, tool diameter correction values MVLL121 and MVLR121, and , Tool diameter correction information TC including the offset values SVLL121 and SVLR121.
  • the offset values SVLL121 and SVLR121 correspond to the offset values SVLL and SVLR shown in FIG.
  • the tool diameter correction amount calculation unit 201 includes a tool path TP11 selected in a period after the switching time point t2, a control center point CL11 on the tool path TP11, machining surface formation positions MPL11 and MPR11, and tool diameter correction values MVLL11 and MVLR11. And tool diameter correction information TC including offset values SVLL11 and SVLR11. That is, the tool diameter correction information TC includes tool diameter correction information in the tool paths TP11, TP112, TP12, and TP121.
  • the tool diameter correction amount calculation unit 201 outputs the tool diameter correction information TC to the machining path calculation unit 202.
  • the processing trajectory calculation unit 202 translates a G code included in the processing program PP. Based on the translation result, the processing program PP, the processing condition CP, and the tool diameter correction information TC, the processing path calculation unit 202 performs the cutting processing with the left tool diameter correction using the nozzle path NP, or uses the nozzle path NP. Either cutting with the right tool radius correction using the tool path TP, cutting with the left tool diameter correction using the tool path TP, or cutting with the right tool diameter correction using the tool path TP Determine the processing correction conditions.
  • the processing path calculation unit 202 converts the tool path TP11 in the tool path interpolation period SP11 based on the tool diameter correction information TC.
  • a tool diameter correction control signal TS including fifth switching information for switching to TP112 is generated.
  • the tool diameter correction amount calculation unit 201 calculates the control center point CL11, the tool diameter correction value MVLL11, and the offset value SVLL11 of the tool path TP11, and the control center point CL112, the tool diameter correction value MVLL112, and the offset value SVLL112 of the tool path TP112. And generates a tool diameter correction control signal TS including sixth switching information for switching to.
  • the machining path calculation unit 202 generates a tool diameter correction control signal TS including seventh switching information for switching the tool path TP112 to the tool path TP12 at the switching time point t1, based on the tool diameter correction information TC.
  • the tool diameter correction amount calculation unit 201 calculates the control center point CL112, the tool diameter correction value MVLL112, and the offset value SVLL112 of the tool path TP112, and the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12 of the tool path TP12.
  • a tool diameter correction control signal TS including eighth switching information for switching to.
  • the processing path calculation unit 202 generates a tool diameter correction control signal TS including ninth switching information for switching the tool path TP12 to the tool path TP121 in the tool path interpolation period SP12 based on the tool diameter correction information TC. I do.
  • the tool diameter correction amount calculation unit 201 calculates the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12 of the tool path TP12, and the control center point CL121, the tool diameter correction value MVLL121, and the offset value SVLL121 of the tool path TP121. And generates a tool diameter correction control signal TS including tenth switching information for switching to.
  • the processing path calculation unit 202 generates a tool diameter correction control signal TS including eleventh switching information for switching the tool path TP121 to the tool path TP11 at the switching time point t2 based on the tool diameter correction information TC.
  • the tool radius correction amount calculation unit 201 calculates the control center point CL121, the tool radius correction value MVLL121, and the offset value SVLL121 of the tool locus TP121, and the control center point CL11, the tool radius correction value MVLL11, and the offset value SVLL11 of the tool locus TP11.
  • a tool diameter correction control signal TS including twelfth switching information for switching to is generated. That is, the tool diameter correction amount calculation unit 201 generates the tool diameter correction control signal TS including the fifth to twelfth switching information.
  • the machining trajectory calculation unit 202 outputs the tool diameter correction control signal TS to the drive control unit 203.
  • the drive control unit 203 generates a drive control signal CS based on the tool diameter correction control signal TS.
  • the drive control unit 203 controls the processing machine main body 100 based on the drive control signal CS.
  • the processing machine body 100 controls the nozzle trajectory NP by driving the X-axis carriage 102 and the Y-axis carriage 103 based on the drive control signal CS. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control section 300 based on the drive control signal CS.
  • the processing machine main body 100 switches the tool path TP11 stepwise to the tool path TP12 via the tool path TP112 set in the tool path interpolation period SP11. .
  • the processing machine body 100 changes the control center point CL11, the tool diameter correction value MVLL11, and the offset value SVLL11 at the switching timing to the control center point CL112, the tool diameter correction value MVLL112, and the offset value SVLL112. Execute
  • the processing machine main body 100 changes the control center point CL112, the tool diameter correction value MVLL112, and the offset value SVLL112 at the switching timing to the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12, and thereby the tool diameter correction.
  • the processing machine body 100 switches the tool path TP12 stepwise to the tool path TP11 via the tool path TP121 set in the tool path interpolation period SP12. . Further, the processing machine body 100 changes the control center point CL12, the tool diameter correction value MVLL12, and the offset value SVLL12 to the control center point CL121, the tool diameter correction value MVLL121, and the offset value SVLL121 at the switching timing.
  • the processing machine body 100 changes the control center point CL121, the tool diameter correction value MVLL121, and the offset value SVLL121 at the switching timing to the control center point CL11, the tool diameter correction value MVLL11, and the offset value SVLL11.
  • step S1 the CAD device 20 generates product shape data SD based on product shape information including dimensions and shapes of the final processed product. Further, the CAD device 20 outputs the product shape data SD to the CAM device 21.
  • step S2 the CAM device 21 generates a machining program PP (including a G code) for the cutting machine 1 based on the product shape data SD, and designates a machining condition CP. Further, the CAM device 21 outputs the machining program PP and the machining condition CP to the NC device 200 of the cutting machine 1.
  • a machining program PP including a G code
  • step S3 the NC device 200 controls the processing machine main body 100 to drive the X-axis carriage 102 and the Y-axis carriage 103 based on the processing program PP and the processing conditions CP, so that the nozzle 106 Move to position.
  • step S4 the NC device 200 controls the laser oscillator 10 based on the processing program PP and the processing conditions CP to emit a laser beam from the opening 105 of the nozzle 106, and Irradiate.
  • the timing of steps S3 and S4 is controlled based on the machining program PP and the machining conditions CP.
  • the machining program PP and the machining conditions CP are input from the CAM device 21 to the tool diameter correction amount computing unit 201 and the machining trajectory computing unit 202 of the NC device 200 in step S2.
  • the tool diameter correction amount calculation unit 201 recognizes whether or not the processing condition CP includes tool path switching information. When it is recognized that the tool path switching information is not included in the processing condition CP, the tool diameter correction amount calculation unit 201 recognizes the tool path TP included in the processing condition CP.
  • the tool diameter correction amount calculation unit 201 recognizes a plurality of tool paths TP included in the tool path switching information. In step S6, the tool diameter correction amount calculation unit 201 sets a tool path interpolation period SP for the switching time point t of the tool path TP.
  • step S7 the tool diameter correction amount calculation unit 201 extracts feature points of the plurality of tool paths TP recognized in step S5.
  • the tool diameter correction amount calculation unit 201 sets a characteristic curve based on the extracted characteristic points. Further, the tool diameter correction amount calculation unit 201 sets the tool path TP (interpolated tool path) in the tool path interpolation period SP while keeping the ratio between the constituent points of the characteristic curve constant.
  • step S8 the tool diameter correction amount calculation unit 201 generates tool diameter correction information TC including correction information based on the tool path TP and correction information based on the nozzle path NP based on the processing program PP and the processing conditions CP. Generate. Further, the tool diameter correction amount calculation unit 201 outputs the tool diameter correction information TC to the machining trajectory calculation unit 202.
  • the machining trajectory calculation unit 202 receives the machining program PP and the machining condition CP from the CAM device 21, and receives the tool radius correction information TC from the tool radius correction amount computation unit 201.
  • the processing locus calculation unit 202 translates the G code included in the processing program PP. Further, based on the translation result, the processing program PP, the processing condition CP, and the tool diameter correction information TC, the processing path calculation unit 202 performs cutting with the left tool diameter correction using the nozzle path NP or the nozzle path NP Either cutting with the right tool diameter correction using the tool path, cutting with the left tool diameter correction using the tool path TP, or cutting with the right tool diameter correction using the tool path TP Is determined.
  • step S10 the machining trajectory calculation unit 202 generates a tool radius correction control signal TS based on the machining program PP, the machining conditions CP, the tool radius compensation information TC, and the determined machining compensation conditions. Further, the machining trajectory calculation unit 202 outputs a tool diameter correction control signal TS to the drive control unit 203.
  • step S11 the drive control unit 203 generates a drive control signal CS for controlling the processing machine body 100 based on the tool diameter correction control signal TS. The drive control unit 203 outputs a drive control signal CS to the processing machine main body 100.
  • step S12 the processing machine body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 based on the drive control signal CS to control the nozzle trajectory NP. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control section 300 based on the drive control signal CS.
  • the processing machine body 100 switches the tool path TP based on the drive control signal CS, and corrects the tool diameter at the switching timing.
  • the drive control unit 203 switches and changes the tool path TP instantaneously. If the tool diameter correction information TC includes a parameter with switching interpolation, the drive control unit 203 changes the tool path TP by switching stepwise via the tool path TP set in the tool path interpolation period SP.
  • the tool diameter correction information TC including the correction information based on the tool path TP and the correction information based on the nozzle path NP is generated.
  • the driving of the processing unit 104 and the driving of the tool path control unit 300 are controlled based on the tool diameter correction information TC, so that the nozzle path NP and the tool The trajectory TP is controlled. Therefore, according to one or more embodiments of the cutting machine and the cutting method, the cutting in a state where the tool path corresponding to the cutting tool or the relative position between the nozzle 106 and the processing table 101 is fixed. Even if the trace is non-circular, the tool diameter of the cutting tool can be accurately corrected.
  • the cutting machine 1 when the cutting condition CP includes cutting tool information for changing a tool path during cutting, the cutting machine 1
  • the tool diameter correction information TC including the tool path TP is generated.
  • the tool diameter correction control signal TS including switching information for switching the tool path TP is generated based on the tool diameter correction information TC.
  • the cutting machine body 100 is controlled based on the tool diameter correction control signal TS to switch the tool path TP.
  • the tool path TP is switched based on the tool diameter correction information TC.
  • the tool diameter can be accurately corrected.
  • the present invention is not limited to one or more embodiments described above, and can be variously changed without departing from the gist of the present invention.
  • one interpolation tool path is set in the tool path interpolation periods SP11 and SP12, but a plurality of interpolation tool paths may be set.
  • the laser machine and the laser processing method have been described as examples, but the invention is not limited thereto.
  • the present invention is also applicable to a water jet processing machine.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
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  • Human Computer Interaction (AREA)
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  • Automation & Control Theory (AREA)
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Abstract

La présente invention concerne une machine de coupe (1) qui comprend un corps de machine (100) et un dispositif NC (200). Le dispositif NC (200) présente une partie de calcul de quantité de correction de diamètre d'outil (201), une partie de calcul de trajet de traitement (202) et une partie de commande d'entraînement (203). Le corps de machine (100) comprend une unité de traitement (104) et une partie de commande de trajet d'outil (300). Lorsque des informations d'outil de coupe qui sont destinées à modifier un trajet d'outil (TP) pendant la coupe sont incluses dans des conditions de traitement (CP), la partie de calcul de quantité de correction de diamètre d'outil (201) reconnaît une pluralité de trajets d'outil (TP) qui sont inclus dans les conditions de traitement (CP) et génère des informations de correction de diamètre d'outil (TC) qui comprennent la pluralité de trajets d'outil (TP). La partie de calcul de trajet de traitement (202) génère un signal de commande de correction de diamètre d'outil (TS) sur la base d'un programme de traitement (PP), des conditions de traitement (CP) et des informations de correction de diamètre d'outil (TC). Sur la base du signal de commande de correction de diamètre d'outil (TS), la partie de commande d'entraînement (203) génère un signal de commande d'entraînement (CS) pour commander le corps de machine (100).
PCT/JP2019/022106 2018-07-06 2019-06-04 Machine de coupe et procédé de coupe WO2020008780A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023007581A1 (fr) * 2021-07-27 2023-02-02 ファナック株式会社 Dispositif de commande numérique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03155484A (ja) * 1989-11-10 1991-07-03 Amada Co Ltd レーザ加工機の自動工具径補正方法
JPH0715179U (ja) * 1993-08-19 1995-03-14 村田機械株式会社 ビーム切断加工機のビーム径オフセット補正装置
CA2725277A1 (fr) * 2009-12-17 2011-06-17 Micromachining Ag Methode de coupe d'une couche de materiau au moyen d'un faisceau de coupe
CN103869748A (zh) * 2014-02-27 2014-06-18 北京信息科技大学 非圆曲面xy直驱加工廓形误差交叉耦合控制系统及方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03155484A (ja) * 1989-11-10 1991-07-03 Amada Co Ltd レーザ加工機の自動工具径補正方法
JPH0715179U (ja) * 1993-08-19 1995-03-14 村田機械株式会社 ビーム切断加工機のビーム径オフセット補正装置
CA2725277A1 (fr) * 2009-12-17 2011-06-17 Micromachining Ag Methode de coupe d'une couche de materiau au moyen d'un faisceau de coupe
CN103869748A (zh) * 2014-02-27 2014-06-18 北京信息科技大学 非圆曲面xy直驱加工廓形误差交叉耦合控制系统及方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023007581A1 (fr) * 2021-07-27 2023-02-02 ファナック株式会社 Dispositif de commande numérique

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