WO2019176631A1 - Cutting machine and cutting method - Google Patents

Cutting machine and cutting method Download PDF

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Publication number
WO2019176631A1
WO2019176631A1 PCT/JP2019/008527 JP2019008527W WO2019176631A1 WO 2019176631 A1 WO2019176631 A1 WO 2019176631A1 JP 2019008527 W JP2019008527 W JP 2019008527W WO 2019176631 A1 WO2019176631 A1 WO 2019176631A1
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WO
WIPO (PCT)
Prior art keywords
tool
cutting
tool path
machining
radius correction
Prior art date
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PCT/JP2019/008527
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French (fr)
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
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.)
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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 JP2020506416A priority Critical patent/JP7129469B2/en
Publication of WO2019176631A1 publication Critical patent/WO2019176631A1/en

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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
    • 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
    • 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
    • B23K26/70—Auxiliary operations or equipment
    • 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
    • G05B19/404—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 control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia

Definitions

  • the present disclosure relates to a cutting machine such as a laser processing machine and a cutting method for processing a workpiece by irradiating a laser beam.
  • a laser beam machine for processing a workpiece by irradiating a laser beam and manufacturing a product having a predetermined shape is widely used.
  • the laser processing machine cuts a workpiece by tool diameter correction in consideration of a cutting amount by a laser beam so that a product has a predetermined shape.
  • Patent Document 1 describes an example of a laser processing machine that cuts a workpiece by tool diameter correction.
  • the laser beam in a state in which the relative position between a nozzle for emitting a laser beam and a processing table on which a processing target is placed is fixed, the laser beam usually has a circular shape, and thus 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.
  • a cutting trace in a state where the position coordinates at which high-pressure water is injected are fixed. Therefore, 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 are fixed is circular.
  • a cutting machine such as a laser processing machine sets the radius of the cutting trace by the cutting tool or the half width of the cutting trace as the tool radius correction amount, and shifts the workpiece by shifting the tool radius correction amount. Controls the trajectory when cutting.
  • the tool diameter correction does not correspond to a case where the cutting trace is non-circular.
  • Embodiments provide a cutting machine and a cutting method capable of accurately correcting the tool diameter of a cutting tool even if the cutting trace in a state where the position coordinates of the cutting tool are fixed is non-circular.
  • the purpose is to do.
  • the machine includes a processing machine main body that cuts a processing object and an NC device that controls the processing machine main body, and the NC apparatus cuts the processing object.
  • a tool radius correction amount calculation unit that generates radius correction information, and a machining path calculation unit that generates a tool radius correction control signal including a cutting correction condition based on the machining program, the machining condition, and the tool radius correction information
  • a drive control unit that generates a drive control signal for controlling the processing machine main body based on the tool radius correction control signal, and the processing machine main body changes a relative position with respect to the processing object.
  • a machining unit that cuts the workpiece and a tool path control unit that controls a tool path that corresponds to the cutting tool and has a non-circular shape based on the drive control signal.
  • the tool path control information set to control the tool path is included in the processing conditions.
  • the tool radius correction amount calculation unit generates the tool radius correction information for correcting the tool radius of the tool path
  • the processing machine main body is configured to generate the tool to be processed based on the drive control signal.
  • a cutting machine is provided that controls the tool path so that the tool path becomes a target tool diameter at a position corresponding to a corner of the final processed product.
  • Tool radius correction information for correcting a tool radius of a cutting tool for cutting the workpiece is generated, and a tool radius correction control signal is generated based on the machining program, the machining conditions, and the tool radius correction information. And generating a drive control signal based on the tool radius correction control signal, and cutting a portion corresponding to a corner of the final processed product with respect to the processing object according to the processing condition.
  • the tool for correcting the tool radius of the tool path when tool path control information corresponding to the cutting tool and set to control a tool path having a non-circular shape is included.
  • the tool diameter of the cutting tool can be accurately corrected even if the cutting trace in a state where the position coordinates of the cutting tool are fixed is non-circular. it can.
  • FIG. 1 is a diagram illustrating an overall configuration example of a cutting machine according to an embodiment.
  • FIG. 2 is a diagram illustrating an example of a tool trajectory.
  • FIG. 3 is a diagram illustrating a configuration example of the tool path control unit.
  • FIG. 4 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory.
  • FIG. 5 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory.
  • FIG. 6 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory.
  • FIG. 7 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory.
  • FIG. 8A is a flowchart illustrating an example of a cutting method according to an embodiment.
  • FIG. 8B is a flowchart illustrating an example of a cutting method according to an embodiment.
  • 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 through the process fiber 11.
  • the processing machine main body 100 cuts the processing target object W by irradiating the processing target object W with the laser beam and changing the relative position between the processing target object W and the beam spot of the laser beam.
  • the laser oscillator 10 a laser oscillator that amplifies excitation light emitted from a laser diode and emits a laser beam having a predetermined wavelength, or a laser oscillator that directly uses a laser beam emitted from the laser diode is preferable.
  • the laser oscillator 10 is, for example, a solid 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 workpiece W is mounted, a portal 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 stainless steel, for example.
  • the workpiece may be an iron-based sheet metal other than stainless steel, or may be a sheet metal such as aluminum, an aluminum alloy, or copper steel.
  • the laser beam emitted from the laser oscillator 10 is transmitted to the processing unit 104 of the processing machine main body 100 through the process fiber 11.
  • the tool path control unit 300 is accommodated in the machining 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 in the Y-axis direction orthogonal to the X-axis on the X-axis carriage 102.
  • the X-axis carriage 102 and the Y-axis carriage 103 move to move the processing unit 104 along the surface of the workpiece W in the X-axis direction, the Y-axis direction, or any combination direction of the X-axis and the Y-axis. Acts as a mechanism.
  • the processing machine body 100 may be configured such that the position of the processing unit 104 is fixed and the workpiece W moves. .
  • the processing machine main body 100 only needs to include a moving mechanism that moves the relative position of the processing unit 104 with respect to the surface of the workpiece 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 irradiated onto the processing target 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 can be arbitrarily set depending on whether the purpose is to suppress oxidation or use heat of oxidation reaction.
  • the workpiece W is irradiated with the laser beam from the opening 105, and the assist gas is sprayed from the opening 105 to the workpiece W.
  • the assist gas discharges the melt within the kerf width in which the workpiece W is melted.
  • the tool trajectory control unit 300 functions as a beam vibration mechanism that vibrates the machining unit 104 and emits a laser beam emitted from the opening 105 with a non-circular vibration pattern.
  • the tool trajectory control unit 300 causes the laser beam to vibrate in a non-circular vibration pattern, so that the processing unit 104 cuts the workpiece W using the non-circular tool trajectory.
  • a specific configuration example of the tool path control unit 300 and a method by which the tool path control unit 300 vibrates the beam spot of the laser beam with a non-circular vibration pattern will be described later.
  • the tool trajectory is a figure drawn by a beam trajectory formed by beam vibration that is vibrated with a non-circular vibration pattern within a predetermined time, and indicates a vibration tool shape.
  • the circular laser beam itself emitted from the nozzle 106 is a cutting tool
  • the beam radius is the tool diameter correction
  • the tool trajectory of the figure drawn with the vibration pattern is referred to as the cutting tool.
  • the cutting trace when the relative position between the nozzle 106 and the machining table 101 is fixed corresponds to the tool trace.
  • a CAD (Computer Aided Design) device 20 generates product shape data (CAD data) SD based on product shape information including dimensions and shapes of a final processed product obtained by cutting the workpiece W.
  • CAM Computer aided manufacturing
  • NC data machining program
  • the CAM device 21 generates a machining program (NC data) PP for the cutting machine 1 to cut the workpiece W based on the product shape data SD, and designates a machining condition CP. That is, the machining program PP and the machining condition CP are set based on product shape information including the size and shape of the final processed product.
  • the machining program PP includes G41 (left tool radius correction) for controlling the locus of the cutting tool by shifting the tool radius correction amount to the left side in the cutting progress direction, or the tool diameter on the right side in the cutting progress direction.
  • G41 left tool radius correction
  • G42 right tool diameter correction
  • the CAM device 21 designates a tool locus corresponding to the cutting tool as the machining condition CP.
  • the tool path has, for example, a non-circular shape.
  • the machining condition CP includes tool path control information in which whether or not to control the tool path when cutting a portion corresponding to the corner portion of the final processed product with respect to the workpiece W is set. Yes.
  • the tool path By controlling the tool path, the tool diameter of the tool path can be changed.
  • a tool path control range and a tool path control ratio are set in the tool path control information.
  • the CAM device 21 can set the tool path control range and the tool path control ratio to arbitrary values, respectively.
  • the tool trajectory control range is a range for controlling the tool trajectory, and is a range from a position where the tool trajectory control is started to a position corresponding to the corner of the final processed product.
  • the tool path control ratio is a ratio for controlling the tool diameter of the tool path. The tool diameter of the tool path is changed according to the tool path control ratio.
  • 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 machining conditions CP include machining parameters such as laser beam output, machining speed, diameter (nozzle diameter) of the opening 105 of the nozzle 106, and cutting gas information such as assist gas conditions. That is, the machining condition CP includes tool path control information, machining target information, and cutting 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 machining program PP and the machining condition CP.
  • the NC device 200 moves the nozzle 106 to a target position by controlling the processing machine main body 100 and driving the X-axis carriage 102 and the Y-axis carriage 103 based on the processing program PP and the processing condition CP.
  • the NC apparatus 200 controls the beam spot locus of the laser beam emitted from the opening 105 of the nozzle 106 by controlling the tool locus control unit 300 based on the machining program PP and the machining condition CP.
  • the beam spot trajectory corresponds to the tool trajectory.
  • the NC device 200 includes a tool radius correction amount calculation unit 201, a machining locus calculation unit 202, and a drive control unit 203.
  • a machining program PP and a machining condition CP are input from the CAM device 21 to the tool radius correction amount computing unit 201 and the machining locus computing unit 202.
  • the tool radius correction amount calculation unit 201 generates tool radius correction information TC for correcting the tool radius of the cutting tool for cutting the workpiece W based on the machining program PP and the machining condition CP.
  • the tool radius correction information TC will be described with reference to FIG.
  • FIG. 2 shows a locus (tool locus) of a beam spot of a laser beam irradiated from the inside of the nozzle 106 to the workpiece W through the opening 105.
  • the tool radius correction amount calculation unit 201 recognizes the tool path TP included in the machining condition CP.
  • the tool radius correction amount calculation unit 201 generates tool radius correction information TC based on the recognized tool trajectory TP, the trajectory NP of the nozzle 106 (hereinafter referred to as the nozzle trajectory NP) and the cutting progress direction DT. .
  • the tool path TP corresponds to a cutting tool for cutting the workpiece W.
  • the shape of the tool trajectory TP corresponds to the shape of the cutting tool.
  • the tool path TP has, for example, a non-circular shape.
  • FIG. 2 indicates a beam spot of a laser beam that moves on the tool trajectory TP.
  • FIG. 2 shows a tool locus TP having a vibration pattern in which the beam spot BS vibrates in the rotation direction as an example of a non-circular shape.
  • the vibration pattern of the tool locus TP may be a free shape including a non-circular shape.
  • the tool trajectory TP corresponds to the trajectory of the beam spot BS of the laser beam.
  • the beam spot BS rotates on the tool trajectory TP.
  • the arrows shown in FIG. 2 indicate the direction of rotation of the beam spot BS.
  • FIG. 2 shows a state in which the beam spot BS rotates in the counterclockwise direction, the beam spot BS may rotate in the clockwise direction.
  • the tool radius correction information TC includes a tool path TP, a control center point CL serving as a reference for controlling the tool path TP, a center point CN of the nozzle 106 in the nozzle path NP (hereinafter referred to as a nozzle center point CN), and including.
  • the control center point CL is the laser beam center in the case of the tool diameter correction in the conventional laser processing.
  • the cutting line is the cutting tool and the product. This is the center position for controlling the cutting tool with respect to the cutting line (cutting position) when the boundary is set.
  • the nozzle locus NP is specifically the locus of the nozzle center point CN.
  • the center point CN of the nozzle 106 is coincident with the center point of the opening 105.
  • FIG. 2 shows a case where the control center point CL and the nozzle center point CN coincide with each other.
  • the tool radius correction information TC includes tool radius correction values MVL and MVR.
  • the tool radius correction values MVL and MVR correspond to the distances from the control center point CL (nozzle center point CN) to the machining surface formation positions MPL and MPR.
  • the machining surface formation positions MPL and MPR are positions where a machining surface is formed on the workpiece W when the tool path TP moves in the cutting progress direction DT. That is, the machining surface formation positions MPL and MPR are positions where the tool diameter is maximum in the tool path TP.
  • the tool radius correction value MVL is a parameter in the left tool radius correction
  • the tool radius correction value MVR is a parameter in the right tool radius correction.
  • the traveling direction DTx indicates a case where the cutting process proceeds in the x direction.
  • the traveling direction DTy indicates a case where the cutting process proceeds in the y direction.
  • Symbols MVLx and MVRx indicate tool radius correction values in the traveling direction DTx.
  • Symbols MVLy and MVRy indicate tool radius correction values in the traveling direction DTy.
  • Symbols MPLx and MPRx indicate machining surface formation positions where a machining surface is formed on the workpiece W when the tool trajectory TP moves in the traveling direction DTx.
  • Symbols MPLy and MPRy indicate positions where a machining surface is formed on the workpiece W when the tool trajectory TP moves in the traveling direction DTy.
  • the tool radius correction values MVLx and MVLy, and the machining surface formation positions MPLx and MPLy are parameters in the left tool radius correction.
  • the tool radius correction values MVRx and MVRy and the machining surface formation positions MPRx and MPRy are parameters in the right tool radius correction.
  • the tool radius correction amount calculation unit 201 outputs tool radius correction information TC including correction information for both the left tool radius correction and the right tool radius correction to the machining locus calculation unit 202.
  • the machining track 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 calculation unit 201.
  • the machining locus calculation unit 202 translates the G code included in the machining program PP. Note that the machining program PP may include a robot language or the like instead of the G code.
  • the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction based on the translation result.
  • the machining locus calculation unit 202 generates a tool radius correction control signal TS based on the machining program PP, the machining condition CP, the tool radius correction information TC, and the determined cutting correction condition.
  • the machining locus calculation unit 202 outputs a tool radius 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 body 100 based on the tool radius correction control signal TS.
  • the drive control unit 203 outputs a drive control signal CS to the processing machine body 100.
  • the drive control unit 203 drives based on the nozzle locus NP, the tool locus TP, the control center point CL of the tool locus TP, the tool radius correction value MVL, and the machining surface forming position MPL.
  • a control signal CS is generated.
  • the drive control unit 203 performs drive control based on the nozzle locus NP, the tool locus TP, the control center point CL of the tool locus TP, the tool radius correction value MVR, and the machining surface forming position MPR.
  • a signal CS is generated.
  • the drive control unit 203 controls the tool path control unit 300 of the processing machine main body 100 by the drive control signal CS.
  • the tool locus control unit 300 controls the locus 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 path control unit 300 is accommodated in the machining unit 104.
  • the tool locus control unit 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 drive unit 342 (first drive unit) that rotationally drives the scan mirror 341, a scan mirror 343 (second scan mirror), and a scan. And a driving unit 344 (second driving unit) that rotationally drives the mirror 343.
  • the driving unit 342 can reciprocate the scan mirror 341 in a predetermined direction (for example, the X direction) in 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 drive the scan mirror 343 to reciprocate in a predetermined angle range in a direction (for example, 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 focusing lens 335 focuses the laser beam reflected by the bend mirror 334 and irradiates the workpiece W.
  • the galvano scanner unit 340 can make the tool trajectory TP into various non-circular shapes by reciprocatingly vibrating 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 (condensing) a laser beam having a certain light intensity or more to a plurality of locations per unit time, the tool shape that is in contact with the workpiece W and substantially contributes to machining can be changed into various non-circular shapes. Can be arbitrarily.
  • 4 to 7 show a case where cutting is performed with the left tool radius correction using the tool locus TP.
  • 4 to 6 show a case where the control center point CL coincides with the nozzle center point CN, and
  • FIG. 7 shows a case where the control center point CL does not coincide with the nozzle center point CN.
  • the machining condition CP includes tool path control information in which whether or not the tool path TP is to be controlled when the part corresponding to the corner of the final processed product is cut with respect to the workpiece W is included. It may or may not be included.
  • the tool path control information set to control the tool path TP includes a tool path TP, a tool path control range, and a tool path control ratio.
  • the tool trajectory control range is a range for controlling the tool trajectory, and is a range from a position where the control of the tool trajectory TP is started to a position corresponding to the corner of the final processed product.
  • the tool path control ratio is a ratio for controlling the tool diameter of the tool path TP. The tool diameter of the tool path TP is changed according to the tool path control ratio.
  • FIG. 4 shows a case where the tool path control information is not included in the machining condition CP, or a case where the tool path control information set so as not to control the tool path TP is included in the machining condition CP. .
  • FIG. 4 shows a state in which the nozzle 106 moves in the X direction and further moves in the Y direction.
  • a symbol NP indicated by a one-dot chain line in FIG. 4 indicates a nozzle locus, and also indicates a locus of the control center point CL of the tool locus TP.
  • the tool radius correction amount calculation unit 201 recognizes whether or not the tool path control information is included in the machining condition CP. When it is recognized that the tool path control information is not included in the machining condition CP, the tool radius correction amount calculation unit 201 fixes the tool path TP. Thereby, the tool radius correction values MVL and MVR corresponding to the tool radius of the tool path TP are fixed. The same applies to the case where tool path control information set so as not to control the tool path TP is included in the machining condition CP.
  • the tool radius correction amount calculation unit 201 generates tool radius correction information TC in which the tool path TP and the tool radius correction values MVL and MVR are fixed.
  • the tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
  • the machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
  • the machining locus calculation unit 202 determines the tool radius correction control signal TS in which the tool locus TP and the tool radius correction value MVL are fixed based on the tool radius correction information TC. Is generated.
  • the machining locus calculation unit 202 performs tool radius correction control in which the tool locus TP and the tool radius correction value MVR are fixed based on the tool radius correction information TC. A signal TS is generated.
  • the machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS.
  • the drive control unit 203 controls the processing machine body 100 with a drive control signal CS.
  • the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP1. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
  • 100 controls the tool trajectory TP based on the control center point CL so that the machining surface formation position MPLx or MPLy moves along the outline of the final machining product based on the drive control signal CS.
  • the tool radius of the tool path TP is corrected so that the tool radius correction value MVLx or MVLy becomes constant.
  • the corner of the final processed product is formed by the tool diameter of the fixed tool locus TP. Therefore, an uncut area UA is formed at the corner of the final processed product according to the tool diameter of the tool path TP.
  • the tool radius correction amount calculation unit 201 is configured to provide a tool path TP, a control center point CL in the tool path TP, tool diameter correction values MVL and MVR, and machining surface formation positions MPL and MPR.
  • Tool radius correction information TC including
  • Reference numerals SP1, SP2, and SP3 shown in FIGS. 5, 6, and 7 are positions SP at which the control of the tool trajectory TP is started (hereinafter referred to as control start positions SP (SP1, SP2, and SP3). ).
  • Reference numerals KP1, KP2, and KP3 shown in FIGS. 5, 6, and 7 indicate positions KP corresponding to the corners of the final processed product (hereinafter referred to as corner corresponding positions KP (KP1, KP2, and KP3). ).
  • Symbols CD1, CD2, and CD3 shown in FIGS. 5, 6, and 7 indicate a tool path control range CD that controls the tool path TP.
  • the tool path control range CD1 is a range from the control start position SP1 to the corner corresponding position KP1.
  • the tool path control range CD2 is a range from the control start position SP2 to the corner corresponding position KP2.
  • the tool path control range CD3 is a range from the control start position SP3 to the corner corresponding position KP3.
  • the CAM device 21 can set the tool path control ratio CR to an arbitrary value.
  • a method for controlling the tool path TP will be described as a first embodiment, a second embodiment, and a third embodiment with reference to FIGS. 5, 6, and 7.
  • FIG. 5 shows a state where the nozzle 106 moves in the X direction and further moves in the Y direction.
  • a symbol NP1 indicated by a one-dot chain line in FIG. 5 indicates a nozzle locus, and also indicates a locus of the control center point CL of the tool locus TP.
  • FIG. 5 shows a case where the tool path control range CD1 and the tool path control ratio CR1 are set in the tool path control information.
  • the tool path control ratio CR1 corresponds to the tool path control ratio CR described above.
  • FIG. 5 shows a case where the tool path control ratio CR1 is set to be minimum.
  • the case where the tool path control ratio CR1 is the minimum is a case where the tool diameter TDk of the tool path TP at the corner corresponding position KP1 is the beam diameter of the beam spot BS, specifically, the beam waist diameter of the beam spot BS. .
  • the tool path control ratio CR1 is set to 30%. Note that when the workpiece W is cut with a defocused laser beam, the tool diameter TDk of the tool locus TP is the beam diameter of the defocused laser beam.
  • the tool radius correction amount calculation unit 201 determines the tool at the control start position SP1 based on the tool path control ratio CR1. Tool diameter correction for correcting the tool diameter TD of the tool path TP continuously or stepwise in the tool path control range CD1 so that the tool diameter TDs of the path TP becomes the target tool diameter TDk at the corner corresponding position KP1. Information TC is generated. Further, the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR1. TC is generated.
  • the tool radius correction amount calculation unit 201 sets the tool path so that the tool diameter TDk of the tool path TP becomes the designed tool diameter TDs after the machining surface formation position MPLy of the tool path TP reaches the corner corresponding position KP1.
  • Tool diameter correction information TC for correcting the tool diameter TD of the TP continuously or stepwise is generated. Further, the tool radius correction amount calculation unit 201 generates tool radius correction information TC that changes the tool radius correction values MVLy and MVRy continuously or stepwise in accordance with the tool radius TD of the tool path TP.
  • the tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
  • the machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
  • the machining locus calculation unit 202 continuously or steps the tool locus TP and the tool radius correction value MVLx in the tool locus control range CD1 based on the tool radius correction information TC.
  • the tool radius correction control signal TS including the first tool path control information for changing automatically is generated.
  • the machining locus calculation unit 202 changes the tool locus TP and the tool radius correction value MVLy continuously or stepwise after the machining surface forming position MPLy of the tool locus TP reaches the corner corresponding position KP1.
  • the tool radius correction control signal TS including the tool path control information of 2 is generated. That is, the tool radius correction amount calculation unit 201 generates a tool radius correction control signal TS including first and second tool path control information.
  • the machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS.
  • the drive control unit 203 controls the processing machine body 100 with a drive control signal CS.
  • the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP1. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
  • the processing machine main body 100 determines that the processing surface formation position MPLx or MPLy is the final processing based on the drive control signal CS.
  • the tool trajectory TP is controlled based on the control center point CL so as to move along the outline of the product.
  • the tool diameter TD of the tool path TP is corrected so that the tool diameter correction values MVLx and MVLy change continuously or stepwise according to the tool path control ratio CR1 in the tool path control range CD1.
  • the processing machine main body 100 moves the machining surface formation position MPLx or MPLy along the outline of the final processed product based on the drive control signal CS, and at the corner of the final processed product in the workpiece W.
  • the tool path TP is controlled on the basis of the control center point CL so that the tool path TP becomes the target tool diameter TD at the corresponding corner corresponding position KP1.
  • the tool diameter TD of the tool path TP is corrected so that the tool diameter correction value MVLx or MVLy changes continuously or stepwise according to the tool path control ratio CR1.
  • the tool path control ratio CR1 When the tool path control ratio CR1 is set to be the minimum, the tool path TP at the corner corresponding position KP1 becomes a beam spot BS as shown in FIG. Thereby, the corner of the final processed product is formed by the tool trajectory TP having the minimum tool diameter TD. Therefore, the uncut area UA at the corner can be reduced as compared with the case where the tool path TP is not controlled.
  • FIG. 6 shows a state where the nozzle 106 moves in the X direction and further moves in the Y direction.
  • a symbol NP2 indicated by a one-dot chain line in FIG. 6 indicates a nozzle locus, and also indicates a locus of the control center point CL of the tool locus TP.
  • FIG. 6 shows a case where the tool path control range CD2 and the tool path control ratio CR2 are set in the tool path control information.
  • the tool path control ratio CR2 corresponds to the tool path control ratio CR described above.
  • FIG. 6 shows a case where the tool path control ratio CR2 is set to an arbitrary value (g%).
  • the case where the tool path control ratio CR2 is g% is a case where the tool diameter TDk of the tool path TP at the corner corresponding position KP2 is g% of the tool diameter TDs of the tool path TP at the control start position SP2.
  • the tool radius correction amount calculation unit 201 determines the tool at the control start position SP2 based on the tool path control ratio CR2. To continuously or stepwise correct the tool diameter TD of the tool path TP in the tool path control range CD2 so that the tool diameter TDs (design value) of the path TP becomes the target tool diameter TDk at the corner corresponding position KP2. Tool radius correction information TC is generated. Further, the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR2. TC is generated.
  • the tool radius correction amount calculation unit 201 sets the tool path so that the tool diameter TDk of the tool path TP becomes the designed tool diameter TDs after the machining surface formation position MPLy of the tool path TP reaches the corner corresponding position KP2.
  • Tool diameter correction information TC for correcting the tool diameter TD of the TP continuously or stepwise is generated. Further, the tool radius correction amount calculation unit 201 generates tool radius correction information TC that changes the tool radius correction values MVLy and MVRy continuously or stepwise in accordance with the tool radius TD of the tool path TP.
  • the tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
  • the machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
  • the machining locus calculation unit 202 continuously or steps the tool locus TP and the tool radius correction value MVLx in the tool locus control range CD2 based on the tool radius correction information TC.
  • a tool radius correction control signal TS including the third tool path control information for changing the position is generated.
  • the machining locus calculation unit 202 changes the tool locus TP and the tool radius correction value MVLy continuously or stepwise after the machining surface forming position MPLy of the tool locus TP reaches the corner corresponding position KP2. 4 generates a tool radius correction control signal TS including the tool path control information. That is, the tool radius correction amount calculation unit 201 generates the tool radius correction control signal TS including the third and fourth tool path control information.
  • the machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS.
  • the drive control unit 203 controls the processing machine body 100 with a drive control signal CS.
  • the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP1. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
  • the processing machine main body 100 determines that the processing surface formation position MPLx or MPLy is the final processing based on the drive control signal CS.
  • the tool trajectory TP is controlled based on the control center point CL so as to move along the outline of the product.
  • the tool diameter TD of the tool path TP is corrected so that the tool diameter correction values MVLx and MVLy change continuously or stepwise in the tool path control range CD2 in accordance with the tool path control ratio CR2.
  • the processing machine main body 100 moves the machining surface formation position MPLx or MPLy along the outline of the final processed product based on the drive control signal CS, and at the corner of the final processed product in the workpiece W.
  • the tool trajectory TP is controlled on the basis of the control center point CL so that the tool trajectory TP becomes the target tool diameter TD at the corresponding corner corresponding position KP2.
  • the tool diameter TD of the tool path TP is corrected so that the tool diameter correction value MVLx or MVLy changes continuously or stepwise according to the tool path control ratio CR2.
  • FIG. 7 shows a state where the nozzle 106 moves in the X direction and further moves in the Y direction.
  • a reference numeral NP3 indicated by a one-dot chain line in FIG. 7 indicates a nozzle locus, and a reference CL3 indicates a locus of the control center point CL of the tool locus TP.
  • FIG. 7 shows a case where the tool path control range CD3 and the tool path control ratio CR3 are set in the tool path control information.
  • the tool path control ratio CR3 corresponds to the tool path control ratio CR described above.
  • FIG. 7 shows a case where the tool path control ratio CR3 is set to be minimum.
  • the case where the tool path control ratio CR3 is the minimum is a case where the tool diameter TDk of the tool path TP at the corner corresponding position KP3 is the beam diameter of the beam spot BS, specifically, the beam waist diameter of the beam spot BS. .
  • the tool path control ratio CR3 is set to 30%.
  • the tool diameter TDk of the tool locus TP is the beam diameter of the defocused laser beam.
  • FIG. 7 shows a case where the control center point CL does not coincide with the nozzle center point CN in the range in which the tool path TP is controlled, including the tool path control range CD3.
  • the tool radius correction amount calculation unit 201 sets the tool diameter of the nozzle 106 to be constant in the tool path control range CD3.
  • Tool radius correction information TC to be generated is generated.
  • the tool diameter correction amount calculation unit 201 determines that the tool diameter TDs of the tool path TP at the control start position SP3 is the target tool diameter TDk at the corner corresponding position KP3 in the tool path control range CD3.
  • the tool radius correction information TC is generated.
  • the tool diameter correction amount calculation unit 201 continuously or stepwise sets the tool diameter TD of the tool path TP in the tool path control range CD3 based on the tool path control ratio CR3 in the tool path control range CD3.
  • Tool radius correction information TC is generated that corrects and moves the control center point CL continuously or stepwise in the cutting direction DT with respect to the nozzle center point CN.
  • the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR3. TC is generated.
  • the tool radius correction amount calculation unit 201 generates tool radius correction information TC that makes the tool radius of the nozzle 106 constant after the machining surface formation position MPLy of the tool trajectory TP reaches the corner corresponding position KP1.
  • the tool radius correction amount calculation unit 201 generates tool radius correction information TC in which the tool radius TDk of the tool trajectory TP becomes the designed tool radius TDs.
  • the tool radius correction amount calculation unit 201 corrects the tool radius TD of the tool trajectory TP continuously or stepwise, and the cutting direction of the control center point CL with respect to the nozzle center point CN.
  • Tool radius correction information TC to be moved continuously or stepwise by DT is generated.
  • the tool radius correction amount calculation unit 201 generates tool radius correction information TC that changes the tool radius correction values MVLy and MVRy continuously or stepwise in accordance with the tool radius TD of the tool path TP.
  • the tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
  • the machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
  • the machining locus calculation unit 202 makes the tool radius of the nozzle 106 constant in the tool locus control range CD3 based on the tool radius correction information TC, and the tool locus.
  • a tool radius correction control signal TS including the tool path control information is generated.
  • the machining locus calculation unit 202 makes the tool radius of the nozzle 106 constant after the machining surface formation position MPLy of the tool locus TP reaches the corner corresponding position KP3, and sets the tool locus TP and the tool radius correction value MVly.
  • a diameter correction control signal TS is generated. That is, the tool radius correction amount calculation unit 201 generates a tool radius correction control signal TS including the fifth and sixth tool path control information.
  • the machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS.
  • the drive control unit 203 controls the processing machine body 100 with a drive control signal CS.
  • the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP3. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
  • the processing machine body 100 sets the tool diameter of the nozzle 106 constant based on the drive control signal CS, and The machining surface forming position MPLx or MPLy moves along the outline of the final processed product, and the control center point CL moves continuously or stepwise in the cutting direction DT with respect to the nozzle center point CN.
  • the tool path TP is controlled.
  • the tool diameter TD of the tool path TP is corrected so that the tool diameter correction values MVLx and MVLy change continuously or stepwise in accordance with the tool path control ratio CR3 in the tool path control range CD3.
  • the processing machine main body 100 moves the machining surface formation position MPLx or MPLy along the outline of the final processed product based on the drive control signal CS, and at the corner of the final processed product in the workpiece W.
  • the tool path TP is controlled so that the tool diameter of the nozzle 106 is constant and the tool path TP becomes the target tool diameter TD.
  • the tool diameter TD of the tool path TP is corrected so that the tool diameter correction value MVLx or MVLy changes continuously or stepwise according to the tool path control ratio CR3. That is, in the range in which the tool locus TP is controlled, the nozzle locus MP3 and the locus CL3 of the control center point CL of the tool locus TP are controlled separately.
  • the central axis of the nozzle 106 passing through the nozzle center point CN is the parent axis
  • the optical axis of the laser beam constituting the tool locus TP corresponds to the child axis. That is, in the range where the tool path TP is controlled, the parent axis and the child axis are distributed according to the tool path control ratio CR3.
  • the tool path control ratio CR1 When the tool path control ratio CR1 is set to be minimum, the tool path TP at the corner corresponding position KP3 becomes a beam spot BS as shown in FIG. Thereby, the corner of the final processed product is formed by the tool trajectory TP having the minimum tool diameter TD. Therefore, the uncut area UA at the corner can be reduced as compared with the case where the tool path TP is not controlled.
  • the CAD device 20 generates product shape data SD based on the product shape information including the size and shape of the final processed product in step S1 of the flowchart shown in FIG. 8A. 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 based on the processing program PP and the processing condition CP to drive the X-axis carriage 102 and the Y-axis carriage 103, thereby setting the target nozzle 106. Move to position. Further, in step S4, the NC device 200 controls the laser oscillator 10 based on the machining program PP and the machining condition CP, thereby emitting a laser beam from the opening 105 of the nozzle 106 to the workpiece W. Irradiate. The timing of step S3 and step S4 is controlled based on the machining program PP and machining conditions CP.
  • step S2 the machining program PP and the machining condition CP are input from the CAM device 21 to the tool diameter correction amount computing unit 201 and the machining locus computing unit 202 of the NC device 200.
  • step S5 the tool radius correction amount calculation unit 201 recognizes whether or not the tool path control information is included in the machining condition CP.
  • the tool trajectory control information determines whether or not to control the tool trajectory TP when cutting a portion corresponding to the corner of the final processed product is set for the workpiece W.
  • a tool path control range CD and a tool path control ratio CR are set.
  • the tool radius correction amount calculation unit 201 recognizes whether or not the tool path control information is set to control the tool path TP. .
  • the tool radius correction amount calculation unit 201 fixes the tool radius of the tool path TP. Thereby, the tool radius correction values MVL and MVR corresponding to the tool radius of the tool path TP are fixed.
  • step S6 the tool radius correction amount calculation unit 201 determines the tool path TP, the control center point CL in the tool path TP, the tool radius correction values MVL and MVR, and the machining surface based on the machining program PP and the machining condition CP.
  • Tool radius correction information TC including the formation positions MPL and MPR is generated.
  • step S5 When it is recognized in step S5 that the tool path control information is included in the machining condition CP and the tool path control information is set to control the tool path, the tool radius correction amount calculation unit 201 The tool path control range CD and the tool path control ratio CR included in the tool path control information are recognized.
  • step S6 the tool diameter correction amount calculation unit 201 determines that the tool diameter TDs (design value) of the tool path TP at the control start position SP is the target tool diameter at the corner corresponding position KP based on the tool path control ratio CR1.
  • the tool diameter TD of the tool path TP is corrected continuously or stepwise in the tool path control range CD so as to be TDk, and the control center point CL is in the cutting progress direction DT with respect to the nozzle center point CN.
  • Tool radius correction information TC for moving continuously or stepwise is generated.
  • the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius of the tool path TP continuously or stepwise according to the tool path control ratio CR. Is generated.
  • the tool radius correction amount calculation unit 201 sets the tool path so that the tool diameter TDk of the tool path TP becomes the designed tool diameter TDs after the machining surface formation position MPLy of the tool path TP reaches the corner corresponding position KP.
  • the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLy and MVRy corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR. TC is generated. The tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
  • the machining locus calculation unit 202 In the machining locus calculation unit 202, the machining program PP and the machining condition CP are input from the CAM device 21 in step S2, and the tool radius correction information TC is input from the tool radius correction amount calculation unit 201 in step S6. In step S7, the machining locus calculation unit 202 translates the G code included in the machining program PP. Further, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction based on the translation result.
  • the machining locus calculation unit 202 performs the tool radius correction control signal TS on the basis of the machining program PP, the machining condition CP, the tool radius correction information TC, and the cutting machining correction condition determined in step S8 of the flowchart shown in FIG. 8B. Is generated. Further, the machining locus calculation unit 202 outputs a tool radius correction control signal TS to the drive control unit 203. In step S9, the drive control unit 203 generates a drive control signal CS for controlling the processing machine main body 100 based on the tool radius correction control signal TS. Further, the drive control unit 203 outputs a drive control signal CS to the processing machine body 100.
  • step S10 the processing machine main 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 locus NP. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
  • step S5 When it is recognized in step S5 that the tool path control information is not included in the machining condition CP, or it is recognized that the tool path control information is included in the machining condition CP, and the tool path control information is the tool
  • the processing machine main body 100 fixes the tool diameter of the tool locus TP in step S11. Thereby, the tool radius correction values MVL and MVR corresponding to the tool radius of the tool path TP are fixed.
  • step S5 When it is recognized in step S5 that the tool path control information is included in the machining condition CP and the tool path control information is set to control the tool path TP, the processing machine main body 100 determines that the tool path control information is in step S12. In the tool path control range CD, the tool surface forming position MPL or MPR moves along the contour line of the final processed product, and the tool path control ratio CR changes continuously or stepwise. The tool diameter TD of the trajectory TP is controlled.
  • the processing machine body 100 controls the tool path TP so that the control center point CL moves continuously or stepwise in the cutting direction DT with respect to the nozzle center point CN in the tool path control range CD. To do.
  • tool radius correction information TC including correction information based on the tool trajectory TP and correction information based on the nozzle trajectory NP is generated.
  • the nozzle locus NP and the tool locus TP are obtained by controlling the drive of the machining unit 104 and the drive of the tool locus control unit 300 based on the tool radius correction information TC. Control. Therefore, according to the cutting machine and the cutting method of the present embodiment, the tool trace corresponding to the cutting tool or the cutting trace in a state where the relative position between the nozzle and the processing stage is fixed is non-circular. Even if it exists, the tool diameter of the cutting tool can be accurately corrected.
  • the machining condition CP includes tool path control information in which whether or not to control the tool path TP is set when cutting a portion corresponding to the corner of the final processed product with respect to the workpiece W. There may be.
  • the tool path control information when the tool path control information is not included in the machining condition CP, or the tool path control information set so as not to control the tool path TP is included. In this case, the tool diameter of the tool path TP is fixed.
  • the tool path control information set to control the tool path TP when the tool path control information set to control the tool path TP is included in the processing condition CP, the tool path control is performed in the tool path control range CD.
  • the tool diameter TD of the tool path TP is controlled so that the ratio CR changes continuously or stepwise.
  • the corner portion of the final processed product can be formed with the target tool diameter by controlling the tool trajectory TP.
  • angular part of a final processed product can be reduced.
  • the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the present invention.
  • the laser processing machine and the laser processing method have been described as examples.
  • the present invention can be applied to, for example, a water jet processing machine.

Abstract

The present invention provides a cutting machine including a cutting machine (1) which comprises a machine body (100) and an NC device (200). The NC device (200) has a tool diameter correction amount calculation unit (201), a processing path calculation unit (202), and a drive control unit (203). The processing path calculation unit (202) generates a tool diameter correction control signal (TS). The drive control unit (203) generates a drive control signal (CS). When tool path control information, which has been set so as to control a tool path (TP) when cutting a portion corresponding to a corner of a final processed product with respect to a workpiece (W), is included in a processing condition (CP), the tool diameter correction amount calculation unit (201) generates tool diameter correction information for correcting the tool diameter of the tool path (TP). The machine body (100) controls the tool path (TP) so that the tool path (TP) becomes the target tool diameter at a position (KP) corresponding to the corner of the final processed product in the workpiece (W).

Description

切削加工機及び切削加工方法Cutting machine and cutting method
　本開示は、レーザビームを照射して加工対象物を加工するレーザ加工機等の切削加工機及び切削加工方法に関する。 The present disclosure relates to a cutting machine such as a laser processing machine and a cutting method for processing a workpiece by irradiating a laser beam.
　切削加工機として、レーザビームを照射して加工対象物を加工し、所定の形状を有する製品を製作するレーザ加工機が普及している。レーザ加工機は、製品が所定の形状を有して製作されるように、レーザビームによる切削量を考慮した工具径補正により加工対象物を切削加工する。特許文献１には、工具径補正により加工対象物を切削加工するレーザ加工機の一例が記載されている。 As a cutting machine, a laser beam machine for processing a workpiece by irradiating a laser beam and manufacturing a product having a predetermined shape is widely used. The laser processing machine cuts a workpiece by tool diameter correction in consideration of a cutting amount by a laser beam so that a product has a predetermined shape. Patent Document 1 describes an example of a laser processing machine that cuts a workpiece by tool diameter correction.
特許第６０８７４８３号公報Japanese Patent No. 6087483
　レーザ加工機において、レーザビームを射出するノズルと加工対象物を載せる加工テーブルとの相対位置が固定されている状態では、レーザビームは通常、円形状を有するため、切削加工跡も円形状を有する。複数の種類の回転工具を備えたマシニングセンタにおいても、回転工具の位置座標が固定されている状態では、切削加工跡は通常、円形状を有する。ウォータジェット加工機においても、高圧水が射出される位置座標が固定されている状態では、切削加工跡は通常、円形状を有する。従って、工具径補正は、ノズル、回転工具、高圧水等の切削工具の位置座標が固定されている状態における切削加工跡が円形状であることを前提としている。 In a laser processing machine, in a state in which the relative position between a nozzle for emitting a laser beam and a processing table on which a processing target is placed is fixed, the laser beam usually has a circular shape, and thus the cutting trace also has a circular shape. . 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. Also in a water jet processing machine, a cutting trace usually has a circular shape in a state where the position coordinates at which high-pressure water is injected are fixed. Therefore, 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 are fixed is circular.
　そのため、レーザ加工機等の切削加工機は、切削工具による切削加工跡の半径分または切削加工跡の半幅分を工具径補正量に設定し、工具径補正量分だけシフトさせて加工対象物を切削加工するときの軌跡を制御する。一般的に、従来の切削加工機では、工具径補正は切削加工跡が非円形状の場合に対応していない。 For this reason, a cutting machine such as a laser processing machine sets the radius of the cutting trace by the cutting tool or the half width of the cutting trace as the tool radius correction amount, and shifts the workpiece by shifting the tool radius correction amount. Controls the trajectory when cutting. In general, in a conventional cutting machine, the tool diameter correction does not correspond to a case where the cutting trace is non-circular.
　実施形態は、切削工具の位置座標が固定されている状態における切削加工跡が非円形状であっても、切削工具の工具径を精度よく補正することができる切削加工機及び切削加工方法を提供することを目的とする。 Embodiments provide a cutting machine and a cutting method capable of accurately correcting the tool diameter of a cutting tool even if the cutting trace in a state where the position coordinates of the cutting tool are fixed is non-circular. The purpose is to do.
　実施形態の第１の態様によれば、加工対象物を切削加工する加工機本体と、前記加工機本体を制御するＮＣ装置とを備え、前記ＮＣ装置は、前記加工対象物を切削加工することによって得られる最終加工製品の寸法及び形状を含む製品形状情報に基づいて設定された加工プログラムと加工条件とに基づいて、前記加工対象物を切削加工する切削工具の工具径を補正するための工具径補正情報を生成する工具径補正量演算部と、前記加工プログラムと前記加工条件と前記工具径補正情報とに基づいて、切削加工補正条件を含む工具径補正制御信号を生成する加工軌跡演算部と、前記工具径補正制御信号に基づいて、前記加工機本体を制御する駆動制御信号を生成する駆動制御部とを有し、前記加工機本体は、前記加工対象物との相対位置を変化させることにより、前記加工対象物を切削加工する加工ユニットと、前記駆動制御信号に基づいて、前記切削工具に相当し、かつ、非円形状を有する工具軌跡を制御する工具軌跡制御部とを有し、前記加工対象物に対して前記最終加工製品の角部に対応する部分を切削加工するとき、前記加工条件に前記工具軌跡を制御するように設定された工具軌跡制御情報が含まれている場合に、前記工具径補正量演算部は、前記工具軌跡の工具径を補正するための前記工具径補正情報を生成し、前記加工機本体は、前記駆動制御信号に基づいて、前記加工対象物における前記最終加工製品の角部に対応する位置において前記工具軌跡が目的の工具径となるように前記工具軌跡を制御することを特徴とする切削加工機が提供される。 According to the first aspect of the embodiment, the machine includes a processing machine main body that cuts a processing object and an NC device that controls the processing machine main body, and the NC apparatus cuts the processing object. A tool for correcting the tool diameter of the cutting tool for cutting the workpiece based on the machining program and machining conditions set based on the product shape information including the size and shape of the final processed product obtained by A tool radius correction amount calculation unit that generates radius correction information, and a machining path calculation unit that generates a tool radius correction control signal including a cutting correction condition based on the machining program, the machining condition, and the tool radius correction information And a drive control unit that generates a drive control signal for controlling the processing machine main body based on the tool radius correction control signal, and the processing machine main body changes a relative position with respect to the processing object. A machining unit that cuts the workpiece, and a tool path control unit that controls a tool path that corresponds to the cutting tool and has a non-circular shape based on the drive control signal. In addition, when the portion corresponding to the corner of the final processed product is cut on the workpiece, the tool path control information set to control the tool path is included in the processing conditions. In this case, the tool radius correction amount calculation unit generates the tool radius correction information for correcting the tool radius of the tool path, and the processing machine main body is configured to generate the tool to be processed based on the drive control signal. A cutting machine is provided that controls the tool path so that the tool path becomes a target tool diameter at a position corresponding to a corner of the final processed product.
　実施形態の第２の態様によれば、加工対象物を切削加工することによって得られる最終加工製品の寸法及び形状を含む製品形状情報に基づいて設定された加工プログラムと加工条件とに基づいて、前記加工対象物を切削加工するための切削工具の工具径を補正するための工具径補正情報を生成し、前記加工プログラムと前記加工条件と前記工具径補正情報とに基づいて工具径補正制御信号を生成し、前記工具径補正制御信号に基づいて駆動制御信号を生成し、前記加工条件に、前記加工対象物に対して、前記最終加工製品の角部に対応する部分を切削加工するときに前記切削工具に相当し、かつ、非円形状を有する工具軌跡を制御するように設定された工具軌跡制御情報が含まれている場合に、前記工具軌跡の工具径を補正するための前記工具径補正情報を生成し、前記駆動制御信号に基づいて、前記加工対象物における前記最終加工製品の角部に対応する位置において前記工具軌跡が目的の工具径となるように前記工具軌跡を制御することを特徴とする切削加工方法が提供される。 According to the second aspect of the embodiment, based on the processing program and processing conditions set based on the product shape information including the size and shape of the final processed product obtained by cutting the workpiece. Tool radius correction information for correcting a tool radius of a cutting tool for cutting the workpiece is generated, and a tool radius correction control signal is generated based on the machining program, the machining conditions, and the tool radius correction information. And generating a drive control signal based on the tool radius correction control signal, and cutting a portion corresponding to a corner of the final processed product with respect to the processing object according to the processing condition. The tool for correcting the tool radius of the tool path when tool path control information corresponding to the cutting tool and set to control a tool path having a non-circular shape is included. Generate tool diameter correction information and control the tool path so that the tool path has a target tool diameter at a position corresponding to a corner of the final processed product on the workpiece based on the drive control signal. A cutting method is provided.
　実施形態の切削加工機及び切削加工方法によれば、切削工具の位置座標が固定されている状態における切削加工跡が非円形状であっても、切削工具の工具径を精度よく補正することができる。 According to the cutting machine and the cutting method of the embodiment, the tool diameter of the cutting tool can be accurately corrected even if the cutting trace in a state where the position coordinates of the cutting tool are fixed is non-circular. it can.
図１は、一実施形態の切削加工機の全体的な構成例を示す図である。FIG. 1 is a diagram illustrating an overall configuration example of a cutting machine according to an embodiment. 図２は、工具軌跡の一例を示す図である。FIG. 2 is a diagram illustrating an example of a tool trajectory. 図３は、工具軌跡制御部の構成例を示す図である。FIG. 3 is a diagram illustrating a configuration example of the tool path control unit. 図４は、最終加工製品の角部と工具軌跡との関係を示す図である。FIG. 4 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory. 図５は、最終加工製品の角部と工具軌跡との関係を示す図である。FIG. 5 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory. 図６は、最終加工製品の角部と工具軌跡との関係を示す図である。FIG. 6 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory. 図７は、最終加工製品の角部と工具軌跡との関係を示す図である。FIG. 7 is a diagram showing the relationship between the corners of the final processed product and the tool trajectory. 図８Ａは、一実施形態の切削加工方法の一例を示すフローチャートである。FIG. 8A is a flowchart illustrating an example of a cutting method according to an embodiment. 図８Ｂは、一実施形態の切削加工方法の一例を示すフローチャートである。FIG. 8B is a flowchart illustrating an example of a cutting method according to an embodiment.
　以下、一実施形態の切削加工機及び切削加工方法について、添付図面を参照して説明する。切削加工機及び切削加工方法の一例として、レーザ加工機及びレーザ加工方法について説明する。 Hereinafter, a cutting machine and a cutting method according to an embodiment will be described with reference to the accompanying drawings. As an example of the cutting machine and the cutting method, a laser processing machine and a laser processing method will be described.
　図１に示すように、切削加工機１は、レーザ発振器１０と、加工機本体１００と、ＮＣ装置（数値制御装置）２００とを備える。ＮＣ装置２００は、レーザ発振器１０と加工機本体１００とを制御する。レーザ発振器１０はレーザビームを生成して射出する。レーザ発振器１０から射出されたレーザビームは、プロセスファイバ１１を介して加工機本体１００へ伝送される。加工機本体１００は、レーザビームを加工対象物Ｗに照射し、かつ、加工対象物Ｗとレーザビームのビームスポットとの相対位置を変化させることにより、加工対象物Ｗを切削加工する。 As shown in FIG. 1, 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 through the process fiber 11. The processing machine main body 100 cuts the processing target object W by irradiating the processing target object W with the laser beam and changing the relative position between the processing target object W and the beam spot of the laser beam.
　レーザ発振器１０としては、レーザダイオードより発せられる励起光を増幅して所定の波長のレーザビームを射出するレーザ発振器、または、レーザダイオードより発せられるレーザビームを直接利用するレーザ発振器が好適である。レーザ発振器１０は、例えば、固体レーザ発振器、ファイバレーザ発振器、ディスクレーザ発振器、または、ダイレクトダイオードレーザ発振器（ＤＤＬ発振器）である。 As the laser oscillator 10, a laser oscillator that amplifies excitation light emitted from a laser diode and emits a laser beam having a predetermined wavelength, or a laser oscillator that directly uses a laser beam emitted from the laser diode is preferable. The laser oscillator 10 is, for example, a solid laser oscillator, a fiber laser oscillator, a disk laser oscillator, or a direct diode laser oscillator (DDL oscillator).
　レーザ発振器１０は、波長９００ｎｍ～１１００ｎｍの１μｍ帯のレーザビームを射出する。ファイバレーザ発振器及びＤＤＬ発振器を例とすると、ファイバレーザ発振器は、波長１０６０ｎｍ～１０８０ｎｍのレーザビームを射出し、ＤＤＬ発振器は、波長９１０ｎｍ～９５０ｎｍのレーザビームを射出する。 The laser oscillator 10 emits a 1 μm band laser beam having a wavelength of 900 nm to 1100 nm. Taking a fiber laser oscillator and a DDL oscillator as examples, the fiber laser oscillator emits a laser beam having a wavelength of 1060 nm to 1080 nm, and the DDL oscillator emits a laser beam having a wavelength of 910 nm to 950 nm.
　加工機本体１００は、加工対象物Ｗを載せる加工テーブル１０１と、門型のＸ軸キャリッジ１０２と、Ｙ軸キャリッジ１０３と、加工ユニット１０４と、工具軌跡制御部３００とを有する。加工対象物Ｗは例えばステンレス鋼よりなる板金である。加工対象物はステンレス鋼以外の鉄系の板金であっても構わないし、アルミニウム、アルミニウム合金、銅鋼などの板金であっても構わない。レーザ発振器１０から射出されたレーザビームは、プロセスファイバ１１を介して加工機本体１００の加工ユニット１０４へ伝送される。工具軌跡制御部３００は加工ユニット１０４の内部に収容されている。 The processing machine main body 100 includes a processing table 101 on which a workpiece W is mounted, a portal 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 stainless steel, for example. The workpiece may be an iron-based sheet metal other than stainless steel, or may be a sheet metal such as aluminum, an aluminum alloy, or copper steel. The laser beam emitted from the laser oscillator 10 is transmitted to the processing unit 104 of the processing machine main body 100 through the process fiber 11. The tool path control unit 300 is accommodated in the machining unit 104.
　Ｘ軸キャリッジ１０２は、加工テーブル１０１上でＸ軸方向に移動自在に構成されている。Ｙ軸キャリッジ１０３は、Ｘ軸キャリッジ１０２上でＸ軸と直交するＹ軸方向に移動自在に構成されている。Ｘ軸キャリッジ１０２及びＹ軸キャリッジ１０３は、加工ユニット１０４を加工対象物Ｗの面に沿って、Ｘ軸方向、Ｙ軸方向、または、Ｘ軸とＹ軸との任意の合成方向に移動させる移動機構として機能する。 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 in the Y-axis direction orthogonal to the X-axis on the X-axis carriage 102. The X-axis carriage 102 and the Y-axis carriage 103 move to move the processing unit 104 along the surface of the workpiece W in the X-axis direction, the Y-axis direction, or any combination direction of the X-axis and the Y-axis. Acts as a mechanism.
　加工機本体１００は、加工ユニット１０４を加工対象物Ｗの面に沿って移動させる代わりに、加工ユニット１０４は位置が固定されていて、加工対象物Ｗが移動するように構成されていてもよい。加工機本体１００は、加工対象物Ｗの面に対する加工ユニット１０４の相対的な位置を移動させる移動機構を備えていればよい。 Instead of moving the processing unit 104 along the surface of the workpiece W, the processing machine body 100 may be configured such that the position of the processing unit 104 is fixed and the workpiece W moves. . The processing machine main body 100 only needs to include a moving mechanism that moves the relative position of the processing unit 104 with respect to the surface of the workpiece W.
　加工ユニット１０４にはノズル１０６が取り付けられている。ノズル１０６の先端部には円形の開口部１０５が形成されている。加工ユニット１０４に伝送されたレーザビームは、ノズル１０６の開口部１０５から射出され、加工対象物Ｗに照射される。 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 irradiated onto the processing target W.
　加工ユニット１０４には、窒素または空気等のアシストガスが供給される。アシストガスは酸素であってもよく、その目的が酸化抑制なのか、酸化反応熱を利用するのかによって、混合比を任意に設定できるものである。レーザビームが開口部１０５から加工対象物Ｗに照射され、かつ、アシストガスが開口部１０５から加工対象物Ｗへと吹き付けられる。アシストガスは、加工対象物Ｗが溶融したカーフ幅内の溶融物を排出する。 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 can be arbitrarily set depending on whether the purpose is to suppress oxidation or use heat of oxidation reaction. The workpiece W is irradiated with the laser beam from the opening 105, and the assist gas is sprayed from the opening 105 to the workpiece W. The assist gas discharges the melt within the kerf width in which the workpiece W is melted.
　工具軌跡制御部３００は、加工ユニット１０４内を進行して開口部１０５から射出されるレーザビームを、非円形状の振動パターンで振動させるビーム振動機構として機能する。工具軌跡制御部３００がレーザビームを非円形状の振動パターンで振動させることにより、加工ユニット１０４は非円形状の工具軌跡により加工対象物Ｗを切削加工する。工具軌跡制御部３００の具体的な構成例、及び、工具軌跡制御部３００がレーザビームのビームスポットを非円形状の振動パターンで振動させる方法については後述する。ここで、工具軌跡とは、一定時間内に非円形状の振動パターンで振動させたビーム振動によってなされたビームの軌跡が描いた図形であって、振動工具形状を指す。つまり、通常は、ノズル１０６から射出される円形のレーザビームそのものが切削工具であり、そのビーム半径分が工具径補正となるが、ここでは、振動パターンで描いた図形の工具軌跡を切削工具とする。ノズル１０６と加工テーブル１０１との相対位置が固定されている状態における切削加工跡は、工具軌跡に対応する。 The tool trajectory control unit 300 functions as a beam vibration mechanism that vibrates the machining unit 104 and emits a laser beam emitted from the opening 105 with a non-circular vibration pattern. The tool trajectory control unit 300 causes the laser beam to vibrate in a non-circular vibration pattern, so that the processing unit 104 cuts the workpiece W using the non-circular tool trajectory. A specific configuration example of the tool path control unit 300 and a method by which the tool path control unit 300 vibrates the beam spot of the laser beam with a non-circular vibration pattern will be described later. Here, the tool trajectory is a figure drawn by a beam trajectory formed by beam vibration that is vibrated with a non-circular vibration pattern within a predetermined time, and indicates a vibration tool shape. That is, normally, the circular laser beam itself emitted from the nozzle 106 is a cutting tool, and the beam radius is the tool diameter correction. Here, the tool trajectory of the figure drawn with the vibration pattern is referred to as the cutting tool. To do. The cutting trace when the relative position between the nozzle 106 and the machining table 101 is fixed corresponds to the tool trace.
　ＣＡＤ（Computer Aided Design）装置２０は、加工対象物Ｗを切削加工することによって得られる最終加工製品の寸法及び形状を含む製品形状情報に基づいて製品形状データ（ＣＡＤデータ）ＳＤを生成し、ＣＡＭ（computer aided manufacturing）装置２１へ出力する。ＣＡＭ装置２１は、製品形状データＳＤに基づいて、切削加工機１が加工対象物Ｗを切削加工するための加工プログラム（ＮＣデータ）ＰＰを生成し、加工条件ＣＰを指定する。即ち、加工プログラムＰＰと加工条件ＣＰとは、最終加工製品の寸法及び形状を含む製品形状情報に基づいて設定させる。 A CAD (Computer Aided Design) device 20 generates product shape data (CAD data) SD based on product shape information including dimensions and shapes of a final processed product obtained by cutting the workpiece W. CAM (Computer aided manufacturing) Output to device 21. The CAM device 21 generates a machining program (NC data) PP for the cutting machine 1 to cut the workpiece W based on the product shape data SD, and designates a machining condition CP. That is, the machining program PP and the machining condition CP are set based on product shape information including the size and shape of the final processed product.
　加工プログラムＰＰには、切削加工の進行方向の左側に工具径補正量分だけシフトさせて切削工具の軌跡を制御するＧ４１（左工具径補正）、または、切削加工の進行方向の右側に工具径補正量分だけシフトさせて切削工具の軌跡を制御するＧ４２（右工具径補正）で示されるＧコードが含まれている。 The machining program PP includes G41 (left tool radius correction) for controlling the locus of the cutting tool by shifting the tool radius correction amount to the left side in the cutting progress direction, or the tool diameter on the right side in the cutting progress direction. A G code indicated by G42 (right tool diameter correction) for controlling the locus of the cutting tool by shifting by the correction amount is included.
　ＣＡＭ装置２１は、加工条件ＣＰとして、切削工具に相当する工具軌跡を指定する。工具軌跡は例えば非円形状を有する。ＣＡＭ装置２１では、加工対象物Ｗに対して、最終加工製品の角部に対応する部分を切削加工するときに工具軌跡を制御するか否かを設定することができる。 The CAM device 21 designates a tool locus corresponding to the cutting tool as the machining condition CP. The tool path has, for example, a non-circular shape. In the CAM device 21, it is possible to set whether or not to control the tool trajectory when cutting the portion corresponding to the corner portion of the final processed product with respect to the workpiece W.
　加工条件ＣＰには、加工対象物Ｗに対して、最終加工製品の角部に対応する部分を切削加工するときに工具軌跡を制御するか否かが設定された工具軌跡制御情報が含まれている。工具軌跡を制御することにより、工具軌跡の工具径を変更することができる。工具軌跡を制御するように設定されている場合、工具軌跡制御情報には工具軌跡制御範囲と工具軌跡制御比率とが設定されている。 The machining condition CP includes tool path control information in which whether or not to control the tool path when cutting a portion corresponding to the corner portion of the final processed product with respect to the workpiece W is set. Yes. By controlling the tool path, the tool diameter of the tool path can be changed. When it is set to control the tool path, a tool path control range and a tool path control ratio are set in the tool path control information.
　ＣＡＭ装置２１は、工具軌跡制御範囲、及び、工具軌跡制御比率をそれぞれ任意の値に設定することができる。工具軌跡制御範囲は、工具軌跡を制御する範囲であり、工具軌跡の制御を開始する位置から最終加工製品の角部に対応する位置までの範囲である。工具軌跡制御比率は、工具軌跡の工具径を制御する比率である。工具軌跡の工具径は工具軌跡制御比率に応じて変更される。 The CAM device 21 can set the tool path control range and the tool path control ratio to arbitrary values, respectively. The tool trajectory control range is a range for controlling the tool trajectory, and is a range from a position where the tool trajectory control is started to a position corresponding to the corner of the final processed product. The tool path control ratio is a ratio for controlling the tool diameter of the tool path. The tool diameter of the tool path is changed according to the tool path control ratio.
　加工条件ＣＰには、加工対象物Ｗの材質及び厚さ等の材料パラメータが指定された加工対象情報が含まれている。加工条件ＣＰには、レーザビームの出力、加工速度、及び、ノズル１０６の開口部１０５の直径（ノズル径）等の加工パラメータ、及び、アシストガス条件等の切削加工情報が含まれている。即ち、加工条件ＣＰには、工具軌跡制御情報と加工対象情報と切削加工情報とが含まれている。 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 machining conditions CP include machining parameters such as laser beam output, machining speed, diameter (nozzle diameter) of the opening 105 of the nozzle 106, and cutting gas information such as assist gas conditions. That is, the machining condition CP includes tool path control information, machining target information, and cutting information.
　ＣＡＭ装置２１は、加工プログラムＰＰと加工条件ＣＰとを切削加工機１のＮＣ装置２００へ出力する。ＮＣ装置２００は、加工プログラムＰＰと加工条件ＣＰとに基づいてレーザ発振器１０を制御する。ＮＣ装置２００は、加工プログラムＰＰと加工条件ＣＰとに基づいて、加工機本体１００を制御してＸ軸キャリッジ１０２及びＹ軸キャリッジ１０３を駆動させることにより、ノズル１０６を目的の位置へ移動させる。 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 machining program PP and the machining condition CP. The NC device 200 moves the nozzle 106 to a target position by controlling the processing machine main body 100 and driving the X-axis carriage 102 and the Y-axis carriage 103 based on the processing program PP and the processing condition CP.
　ＮＣ装置２００は、加工プログラムＰＰと加工条件ＣＰとに基づいて、工具軌跡制御部３００を制御することにより、ノズル１０６の開口部１０５より射出されるレーザビームのビームスポットの軌跡を制御する。ビームスポットの軌跡は工具軌跡に相当する。 The NC apparatus 200 controls the beam spot locus of the laser beam emitted from the opening 105 of the nozzle 106 by controlling the tool locus control unit 300 based on the machining program PP and the machining condition CP. The beam spot trajectory corresponds to the tool trajectory.
　ＮＣ装置２００は、工具径補正量演算部２０１と、加工軌跡演算部２０２と、駆動制御部２０３とを有する。工具径補正量演算部２０１、及び、加工軌跡演算部２０２には、ＣＡＭ装置２１から加工プログラムＰＰと加工条件ＣＰとが入力される。工具径補正量演算部２０１は、加工プログラムＰＰと加工条件ＣＰとに基づいて、加工対象物Ｗを切削加工するための切削工具の工具径を補正するための工具径補正情報ＴＣを生成する。 The NC device 200 includes a tool radius correction amount calculation unit 201, a machining locus calculation unit 202, and a drive control unit 203. A machining program PP and a machining condition CP are input from the CAM device 21 to the tool radius correction amount computing unit 201 and the machining locus computing unit 202. The tool radius correction amount calculation unit 201 generates tool radius correction information TC for correcting the tool radius of the cutting tool for cutting the workpiece W based on the machining program PP and the machining condition CP.
　図２を用いて、工具径補正情報ＴＣについて説明する。図２は、ノズル１０６の内部から開口部１０５を介して加工対象物Ｗに照射されるレーザビームのビームスポットの軌跡（工具軌跡）を示している。 The tool radius correction information TC will be described with reference to FIG. FIG. 2 shows a locus (tool locus) of a beam spot of a laser beam irradiated from the inside of the nozzle 106 to the workpiece W through the opening 105.
　工具径補正量演算部２０１は、加工条件ＣＰに含まれる工具軌跡ＴＰを認識する。工具径補正量演算部２０１は、認識された工具軌跡ＴＰとノズル１０６の軌跡ＮＰ（以下、ノズル軌跡ＮＰとする）と切削加工の進行方向ＤＴとに基づいて、工具径補正情報ＴＣを生成する。工具軌跡ＴＰは加工対象物Ｗを切削加工するための切削工具に相当する。工具軌跡ＴＰの形状は切削工具の形状に相当する。工具軌跡ＴＰは例えば非円形状を有する。 The tool radius correction amount calculation unit 201 recognizes the tool path TP included in the machining condition CP. The tool radius correction amount calculation unit 201 generates tool radius correction information TC based on the recognized tool trajectory TP, the trajectory NP of the nozzle 106 (hereinafter referred to as the nozzle trajectory NP) and the cutting progress direction DT. . The tool path TP corresponds to a cutting tool for cutting the workpiece W. The shape of the tool trajectory TP corresponds to the shape of the cutting tool. The tool path TP has, for example, a non-circular shape.
　図２に示す符号ＢＳは、工具軌跡ＴＰ上を移動するレーザビームのビームスポットを示している。図２には、非円形状の一例として、ビームスポットＢＳが回転方向に振動する振動パターンの工具軌跡ＴＰを示している。なお、工具軌跡ＴＰの振動パターンは非円形状を含む自由形状であればよい。 2 indicates a beam spot of a laser beam that moves on the tool trajectory TP. FIG. 2 shows a tool locus TP having a vibration pattern in which the beam spot BS vibrates in the rotation direction as an example of a non-circular shape. The vibration pattern of the tool locus TP may be a free shape including a non-circular shape.
　レーザ加工機の場合、工具軌跡ＴＰはレーザビームのビームスポットＢＳの軌跡に相当する。ビームスポットＢＳは工具軌跡ＴＰ上を回転移動する。図２に示す矢印は、ビームスポットＢＳの回転方向を示している。なお、図２ではビームスポットＢＳが左回りに回転移動する状態を示しているが、ビームスポットＢＳが右回りに回転移動するようにしてもよい。 In the case of a laser processing machine, the tool trajectory TP corresponds to the trajectory of the beam spot BS of the laser beam. The beam spot BS rotates on the tool trajectory TP. The arrows shown in FIG. 2 indicate the direction of rotation of the beam spot BS. Although FIG. 2 shows a state in which the beam spot BS rotates in the counterclockwise direction, the beam spot BS may rotate in the clockwise direction.
　工具径補正情報ＴＣは、工具軌跡ＴＰと、工具軌跡ＴＰを制御するための基準となる制御中心点ＣＬと、ノズル軌跡ＮＰにおけるノズル１０６の中心点ＣＮ（以下、ノズル中心点ＣＮとする）とを含む。なお、制御中心点ＣＬとは、従前のレーザ加工の工具径補正の場合のレーザビーム中心であり、本件の場合は工具軌跡を非円形状の切削工具とするとき、切断ラインを切削工具と製品の境界とするときの切断ライン（切断位置）に対して切削工具を制御する中心の位置である。
ノズル軌跡ＮＰとは、具体的にはノズル中心点ＣＮの軌跡である。ノズル１０６の中心点ＣＮと開口部１０５の中心点とは一致している。図２は、制御中心点ＣＬとノズル中心点ＣＮとが一致している場合を示している。 The tool radius correction information TC includes a tool path TP, a control center point CL serving as a reference for controlling the tool path TP, a center point CN of the nozzle 106 in the nozzle path NP (hereinafter referred to as a nozzle center point CN), and including. The control center point CL is the laser beam center in the case of the tool diameter correction in the conventional laser processing. In this case, when the tool locus is a non-circular cutting tool, the cutting line is the cutting tool and the product. This is the center position for controlling the cutting tool with respect to the cutting line (cutting position) when the boundary is set.
The nozzle locus NP is specifically the locus of the nozzle center point CN. The center point CN of the nozzle 106 is coincident with the center point of the opening 105. FIG. 2 shows a case where the control center point CL and the nozzle center point CN coincide with each other.
　工具径補正情報ＴＣは、工具径補正値ＭＶＬ及びＭＶＲを含む。工具径補正値ＭＶＬ及びＭＶＲは、制御中心点ＣＬ（ノズル中心点ＣＮ）から加工面形成位置ＭＰＬ及びＭＰＲまでの距離に相当する。加工面形成位置ＭＰＬ及びＭＰＲは、工具軌跡ＴＰが切削加工の進行方向ＤＴに移動したときに、加工対象物Ｗに加工面が形成される位置である。即ち、加工面形成位置ＭＰＬ及びＭＰＲは、工具軌跡ＴＰにおいて工具径が最大となる位置である。工具径補正値ＭＶＬは左工具径補正におけるパラメータであり、工具径補正値ＭＶＲは右工具径補正におけるパラメータである。 The tool radius correction information TC includes tool radius correction values MVL and MVR. The tool radius correction values MVL and MVR correspond to the distances from the control center point CL (nozzle center point CN) to the machining surface formation positions MPL and MPR. The machining surface formation positions MPL and MPR are positions where a machining surface is formed on the workpiece W when the tool path TP moves in the cutting progress direction DT. That is, the machining surface formation positions MPL and MPR are positions where the tool diameter is maximum in the tool path TP. The tool radius correction value MVL is a parameter in the left tool radius correction, and the tool radius correction value MVR is a parameter in the right tool radius correction.
　図２に示す符号ＤＴｘ及びＤＴｙは切削加工の進行方向を示す。進行方向ＤＴｘは切削加工がｘ方向に進行する場合を示す。進行方向ＤＴｙは切削加工がｙ方向に進行する場合を示す。符号ＭＶＬｘ及びＭＶＲｘは進行方向ＤＴｘにおける工具径補正値を示す。符号ＭＶＬｙ及びＭＶＲｙは進行方向ＤＴｙにおける工具径補正値を示す。 Numerals DTx and DTy shown in FIG. The traveling direction DTx indicates a case where the cutting process proceeds in the x direction. The traveling direction DTy indicates a case where the cutting process proceeds in the y direction. Symbols MVLx and MVRx indicate tool radius correction values in the traveling direction DTx. Symbols MVLy and MVRy indicate tool radius correction values in the traveling direction DTy.
　符号ＭＰＬｘ及びＭＰＲｘは工具軌跡ＴＰが進行方向ＤＴｘに移動したときに、加工対象物Ｗに加工面が形成される加工面形成位置を示す。符号ＭＰＬｙ及びＭＰＲｙは工具軌跡ＴＰが進行方向ＤＴｙに移動したときに、加工対象物Ｗに加工面が形成される位置を示す。工具径補正値ＭＶＬｘ及びＭＶＬｙ、並びに、加工面形成位置ＭＰＬｘ及びＭＰＬｙは左工具径補正におけるパラメータである。工具径補正値ＭＶＲｘ及びＭＶＲｙ、並びに、加工面形成位置ＭＰＲｘ及びＭＰＲｙは右工具径補正におけるパラメータである。 Symbols MPLx and MPRx indicate machining surface formation positions where a machining surface is formed on the workpiece W when the tool trajectory TP moves in the traveling direction DTx. Symbols MPLy and MPRy indicate positions where a machining surface is formed on the workpiece W when the tool trajectory TP moves in the traveling direction DTy. The tool radius correction values MVLx and MVLy, and the machining surface formation positions MPLx and MPLy are parameters in the left tool radius correction. The tool radius correction values MVRx and MVRy and the machining surface formation positions MPRx and MPRy are parameters in the right tool radius correction.
　工具径補正量演算部２０１は、左工具径補正と右工具径補正の両方の補正情報を含む工具径補正情報ＴＣを加工軌跡演算部２０２へ出力する。加工軌跡演算部２０２には、ＣＡＭ装置２１から加工プログラムＰＰと加工条件ＣＰとが入力され、工具径補正量演算部２０１から工具径補正情報ＴＣが入力される。加工軌跡演算部２０２は、加工プログラムＰＰに含まれているＧコードを翻訳する。なお、加工プログラムＰＰはＧコードの代わりにロボット言語等を含んでいてもよい。 The tool radius correction amount calculation unit 201 outputs tool radius correction information TC including correction information for both the left tool radius correction and the right tool radius correction to the machining locus calculation unit 202. The machining track 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 calculation unit 201. The machining locus calculation unit 202 translates the G code included in the machining program PP. Note that the machining program PP may include a robot language or the like instead of the G code.
　加工軌跡演算部２０２は、翻訳結果に基づいて、左工具径補正にて切削加工するか、右工具径補正にて切削加工するかのいずれかの切削加工補正条件を決定する。 The machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction based on the translation result.
　加工軌跡演算部２０２は、加工プログラムＰＰと加工条件ＣＰと工具径補正情報ＴＣと決定された切削加工補正条件とに基づいて工具径補正制御信号ＴＳを生成する。加工軌跡演算部２０２は、工具径補正制御信号ＴＳを駆動制御部２０３へ出力する。駆動制御部２０３は、工具径補正制御信号ＴＳに基づいて、加工機本体１００を制御する駆動制御信号ＣＳを生成する。駆動制御部２０３は駆動制御信号ＣＳを加工機本体１００へ出力する。 The machining locus calculation unit 202 generates a tool radius correction control signal TS based on the machining program PP, the machining condition CP, the tool radius correction information TC, and the determined cutting correction condition. The machining locus calculation unit 202 outputs a tool radius 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 body 100 based on the tool radius correction control signal TS. The drive control unit 203 outputs a drive control signal CS to the processing machine body 100.
　左工具径補正にて切削加工する場合、駆動制御部２０３は、ノズル軌跡ＮＰと工具軌跡ＴＰと工具軌跡ＴＰの制御中心点ＣＬと工具径補正値ＭＶＬと加工面形成位置ＭＰＬとに基づいて駆動制御信号ＣＳを生成する。右工具径補正にて切削加工する場合、駆動制御部２０３は、ノズル軌跡ＮＰと工具軌跡ＴＰと工具軌跡ＴＰの制御中心点ＣＬと工具径補正値ＭＶＲと加工面形成位置ＭＰＲに基づいて駆動制御信号ＣＳを生成する。 When cutting with the left tool radius correction, the drive control unit 203 drives based on the nozzle locus NP, the tool locus TP, the control center point CL of the tool locus TP, the tool radius correction value MVL, and the machining surface forming position MPL. A control signal CS is generated. When cutting with the right tool radius correction, the drive control unit 203 performs drive control based on the nozzle locus NP, the tool locus TP, the control center point CL of the tool locus TP, the tool radius correction value MVR, and the machining surface forming position MPR. A signal CS is generated.
　駆動制御部２０３は、駆動制御信号ＣＳにより、加工機本体１００の工具軌跡制御部３００を制御する。工具軌跡制御部３００は、駆動制御信号ＣＳに基づいて、ノズル１０６の開口部１０５より射出されるレーザビームのビームスポットＢＳの軌跡を制御する。 The drive control unit 203 controls the tool path control unit 300 of the processing machine main body 100 by the drive control signal CS. The tool locus control unit 300 controls the locus 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.
　図３を用いて、工具軌跡制御部３００の具体的な構成例、及び、工具軌跡制御部３００がレーザビームのビームスポットＢＳを非円形状の振動パターンで振動させる方法の一例を説明する。 3, a specific configuration example of the tool path control unit 300 and an example of a method in which the tool path control unit 300 vibrates the beam spot BS of the laser beam with a non-circular vibration pattern will be described.
　図３に示すように、工具軌跡制御部３００は加工ユニット１０４の内部に収容されている。工具軌跡制御部３００は、コリメータレンズ３３１と、ガルバノスキャナユニット３４０と、ベンドミラー３３４と、集束レンズ３３５とを有する。コリメータレンズ３３１は、プロセスファイバ１１より射出されたレーザビームを平行光（コリメート光）に変換する。 As shown in FIG. 3, the tool path control unit 300 is accommodated in the machining unit 104. The tool locus control unit 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).
　ガルバノスキャナユニット３４０は、スキャンミラー３４１（第１のスキャンミラー）と、スキャンミラー３４１を回転駆動させる駆動部３４２（第１の駆動部）と、スキャンミラー３４３（第２のスキャンミラー）と、スキャンミラー３４３を回転駆動させる駆動部３４４（第２の駆動部）とを有する。 The galvano scanner unit 340 includes a scan mirror 341 (first scan mirror), a drive unit 342 (first drive unit) that rotationally drives the scan mirror 341, a scan mirror 343 (second scan mirror), and a scan. And a driving unit 344 (second driving unit) that rotationally drives the mirror 343.
　駆動部３４２は、駆動制御部２０３の制御により、スキャンミラー３４１を所定の方向（例えばＸ方向）に所定の角度範囲で往復駆動させることができる。スキャンミラー３４１は、コリメータレンズ３２１により平行光に変換されたレーザビームをスキャンミラー３４３に向けて反射する。 The driving unit 342 can reciprocate the scan mirror 341 in a predetermined direction (for example, the X direction) in 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.
　駆動部３４４は、駆動制御部２０３の制御により、スキャンミラー３４３を、スキャンミラー３４１の駆動方向とは異なる方向（例えばＹ方向）に所定の角度範囲で往復駆動させることができる。スキャンミラー３４３は、スキャンミラー３４１により反射されたレーザビームをベンドミラー３３４に向けて反射する。 The drive unit 344 can drive the scan mirror 343 to reciprocate in a predetermined angle range in a direction (for example, 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.
　ベンドミラー３３４は、スキャンミラー３４３により反射されたレーザビームをＸ軸及びＹ軸に垂直なＺ軸方向下方に向けて反射させる。集束レンズ３３５はベンドミラー３３４により反射したレーザビームを集束して、加工対象物Ｗに照射する。 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 focusing lens 335 focuses the laser beam reflected by the bend mirror 334 and irradiates the workpiece W.
　ガルバノスキャナユニット３４０は、スキャンミラー３４１とスキャンミラー３４３とのいずれか一方または双方を高速で例えば１０００Ｈｚ以上で往復振動させることにより、工具軌跡ＴＰを多種の非円形状にすることができる。即ち、一定の光強度以上のレーザビームを単位時間当たりに複数個所へ集束（集光）させることにより、加工対象物Ｗに接して実質的に加工に寄与する工具形状を、多種の非円形状にすることが任意にできる。 The galvano scanner unit 340 can make the tool trajectory TP into various non-circular shapes by reciprocatingly vibrating 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 (condensing) a laser beam having a certain light intensity or more to a plurality of locations per unit time, the tool shape that is in contact with the workpiece W and substantially contributes to machining can be changed into various non-circular shapes. Can be arbitrarily.
　図４、図５、図６、及び、図７を用いて、加工条件ＣＰに、最終加工製品の角部に対応する部分を切削加工するときに工具軌跡ＴＰを制御するか否かが設定された工具軌跡制御情報が含まれていない場合と含まれている場合とについて説明する。図４～図７は、工具軌跡ＴＰを用いて左工具径補正にて切削加工する場合を示している。図４～図６は制御中心点ＣＬがノズル中心点ＣＮと一致する場合を示し、図７は制御中心点ＣＬがノズル中心点ＣＮと一致しない場合を示している。 4, 5, 6, and 7, whether or not to control the tool trajectory TP when cutting a portion corresponding to the corner portion of the final processed product is set as the processing condition CP. A case where the tool path control information is not included and a case where it is included will be described. 4 to 7 show a case where cutting is performed with the left tool radius correction using the tool locus TP. 4 to 6 show a case where the control center point CL coincides with the nozzle center point CN, and FIG. 7 shows a case where the control center point CL does not coincide with the nozzle center point CN.
　加工条件ＣＰには、加工対象物Ｗに対して、最終加工製品の角部に対応する部分を切削加工するときに工具軌跡ＴＰを制御するか否かが設定された工具軌跡制御情報が含まれていない場合と含まれている場合とがある。工具軌跡ＴＰを制御するように設定された工具軌跡制御情報には、工具軌跡ＴＰと工具軌跡制御範囲と工具軌跡制御比率とが含まれている。 The machining condition CP includes tool path control information in which whether or not the tool path TP is to be controlled when the part corresponding to the corner of the final processed product is cut with respect to the workpiece W is included. It may or may not be included. The tool path control information set to control the tool path TP includes a tool path TP, a tool path control range, and a tool path control ratio.
　工具軌跡制御範囲は、工具軌跡を制御する範囲であり、工具軌跡ＴＰの制御を開始する位置から最終加工製品の角部に対応する位置までの範囲である。工具軌跡制御比率は工具軌跡ＴＰの工具径を制御する比率である。工具軌跡ＴＰの工具径は工具軌跡制御比率に応じて変更される。 The tool trajectory control range is a range for controlling the tool trajectory, and is a range from a position where the control of the tool trajectory TP is started to a position corresponding to the corner of the final processed product. The tool path control ratio is a ratio for controlling the tool diameter of the tool path TP. The tool diameter of the tool path TP is changed according to the tool path control ratio.
　図４は、加工条件ＣＰに工具軌跡制御情報が含まれていない場合、または、加工条件ＣＰに工具軌跡ＴＰを制御しないように設定された工具軌跡制御情報が含まれている場合を示している。図４は、ノズル１０６がＸ方向に移動し、さらにＹ方向に移動する状態を示している。図４に一点鎖線で示す符号ＮＰはノズル軌跡を示し、かつ、工具軌跡ＴＰの制御中心点ＣＬの軌跡を示している。 FIG. 4 shows a case where the tool path control information is not included in the machining condition CP, or a case where the tool path control information set so as not to control the tool path TP is included in the machining condition CP. . FIG. 4 shows a state in which the nozzle 106 moves in the X direction and further moves in the Y direction. A symbol NP indicated by a one-dot chain line in FIG. 4 indicates a nozzle locus, and also indicates a locus of the control center point CL of the tool locus TP.
　工具径補正量演算部２０１は、加工条件ＣＰに工具軌跡制御情報が含まれているか否かを認識する。加工条件ＣＰに工具軌跡制御情報が含まれていないと認識された場合、工具径補正量演算部２０１は、工具軌跡ＴＰを固定する。これにより、工具軌跡ＴＰの工具径に対応する工具径補正値ＭＶＬ及びＭＶＲは固定される。加工条件ＣＰに工具軌跡ＴＰを制御しないように設定された工具軌跡制御情報が含まれている場合も同様である。 The tool radius correction amount calculation unit 201 recognizes whether or not the tool path control information is included in the machining condition CP. When it is recognized that the tool path control information is not included in the machining condition CP, the tool radius correction amount calculation unit 201 fixes the tool path TP. Thereby, the tool radius correction values MVL and MVR corresponding to the tool radius of the tool path TP are fixed. The same applies to the case where tool path control information set so as not to control the tool path TP is included in the machining condition CP.
　工具径補正量演算部２０１は、工具軌跡ＴＰと工具径補正値ＭＶＬ及びＭＶＲとが固定された工具径補正情報ＴＣを生成する。工具径補正量演算部２０１は、工具径補正情報ＴＣを加工軌跡演算部２０２へ出力する。 The tool radius correction amount calculation unit 201 generates tool radius correction information TC in which the tool path TP and the tool radius correction values MVL and MVR are fixed. The tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
　加工軌跡演算部２０２は、加工プログラムＰＰに含まれているＧコードを翻訳する。加工軌跡演算部２０２は、翻訳結果に基づいて、左工具径補正にて切削加工するか、右工具径補正にて切削加工するかのいずれかの切削加工補正条件を決定する。 The machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
　左工具径補正にて切削加工すると決定された場合、加工軌跡演算部２０２は、工具径補正情報ＴＣに基づいて、工具軌跡ＴＰと工具径補正値ＭＶＬとが固定された工具径補正制御信号ＴＳを生成する。なお、右工具径補正にて切削加工すると決定された場合、加工軌跡演算部２０２は、工具径補正情報ＴＣに基づいて、工具軌跡ＴＰと工具径補正値ＭＶＲとが固定された工具径補正制御信号ＴＳを生成する。 When it is determined to perform the cutting with the left tool radius correction, the machining locus calculation unit 202 determines the tool radius correction control signal TS in which the tool locus TP and the tool radius correction value MVL are fixed based on the tool radius correction information TC. Is generated. When it is determined that cutting is performed with the right tool radius correction, the machining locus calculation unit 202 performs tool radius correction control in which the tool locus TP and the tool radius correction value MVR are fixed based on the tool radius correction information TC. A signal TS is generated.
　加工軌跡演算部２０２は、工具径補正制御信号ＴＳを駆動制御部２０３へ出力する。駆動制御部２０３は、工具径補正制御信号ＴＳに基づいて駆動制御信号ＣＳを生成する。駆動制御部２０３は、駆動制御信号ＣＳにより、加工機本体１００を制御する。加工機本体１００は、駆動制御信号ＣＳに基づいて、Ｘ軸キャリッジ１０２及びＹ軸キャリッジ１０３を駆動させてノズル軌跡ＮＰ１を制御する。また、加工機本体１００は、駆動制御信号ＣＳに基づいて、工具軌跡制御部３００を駆動させて工具軌跡ＴＰを制御する。 The machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS. The drive control unit 203 controls the processing machine body 100 with a drive control signal CS. Based on the drive control signal CS, the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP1. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
　加工条件ＣＰに工具軌跡制御情報が含まれていないと認識された場合、または、加工条件ＣＰに工具軌跡ＴＰを制御しないように設定された工具軌跡制御情報が含まれている場合、加工機本体１００は、駆動制御信号ＣＳに基づいて、加工面形成位置ＭＰＬｘまたはＭＰＬｙが最終加工製品の外形線に沿って移動するように、制御中心点ＣＬを基準として工具軌跡ＴＰを制御する。これにより、工具軌跡ＴＰの工具径は、工具径補正値ＭＶＬｘまたはＭＶＬｙが一定となるように補正される。 When it is recognized that the tool path control information is not included in the machining condition CP, or when the tool path control information set so as not to control the tool path TP is included in the machining condition CP, 100 controls the tool trajectory TP based on the control center point CL so that the machining surface formation position MPLx or MPLy moves along the outline of the final machining product based on the drive control signal CS. Thereby, the tool radius of the tool path TP is corrected so that the tool radius correction value MVLx or MVLy becomes constant.
　図４に示すように、最終加工製品の角部は、固定された工具軌跡ＴＰの工具径により形成される。そのため、最終加工製品の角部には、工具軌跡ＴＰの工具径に応じて未切削領域ＵＡが形成される。 As shown in FIG. 4, the corner of the final processed product is formed by the tool diameter of the fixed tool locus TP. Therefore, an uncut area UA is formed at the corner of the final processed product according to the tool diameter of the tool path TP.
　工具径補正量演算部２０１は、加工プログラムＰＰと加工条件ＣＰとに基づいて、工具軌跡ＴＰと、工具軌跡ＴＰにおける制御中心点ＣＬと工具径補正値ＭＶＬ及びＭＶＲと加工面形成位置ＭＰＬ及びＭＰＲとを含む工具径補正情報ＴＣを生成する。 Based on the machining program PP and the machining condition CP, the tool radius correction amount calculation unit 201 is configured to provide a tool path TP, a control center point CL in the tool path TP, tool diameter correction values MVL and MVR, and machining surface formation positions MPL and MPR. Tool radius correction information TC including
　図５～図７を用いて、加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合について説明する。図５、図６、及び、図７に示す符号ＳＰ１、ＳＰ２、及び、ＳＰ３は、工具軌跡ＴＰの制御を開始する位置ＳＰ（以下、制御開始位置ＳＰ（ＳＰ１、ＳＰ２、及び、ＳＰ３）とする）を示している。図５、図６、及び、図７に示す符号ＫＰ１、ＫＰ２、及び、ＫＰ３は、最終加工製品の角部に対応する位置ＫＰ（以下、角部対応位置ＫＰ（ＫＰ１、ＫＰ２、及び、ＫＰ３）とする）を示している。 A case where tool path control information set so as to control the tool path TP is included in the machining condition CP will be described with reference to FIGS. Reference numerals SP1, SP2, and SP3 shown in FIGS. 5, 6, and 7 are positions SP at which the control of the tool trajectory TP is started (hereinafter referred to as control start positions SP (SP1, SP2, and SP3). ). Reference numerals KP1, KP2, and KP3 shown in FIGS. 5, 6, and 7 indicate positions KP corresponding to the corners of the final processed product (hereinafter referred to as corner corresponding positions KP (KP1, KP2, and KP3). ).
　図５、図６、及び、図７に示す符号ＣＤ１、ＣＤ２、及び、ＣＤ３は、工具軌跡ＴＰを制御する工具軌跡制御範囲ＣＤを示している。具体的には、工具軌跡制御範囲ＣＤ１は、制御開始位置ＳＰ１から角部対応位置ＫＰ１までの範囲である。工具軌跡制御範囲ＣＤ２は、制御開始位置ＳＰ２から角部対応位置ＫＰ２までの範囲である。工具軌跡制御範囲ＣＤ３は、制御開始位置ＳＰ３から角部対応位置ＫＰ３までの範囲である。 Symbols CD1, CD2, and CD3 shown in FIGS. 5, 6, and 7 indicate a tool path control range CD that controls the tool path TP. Specifically, the tool path control range CD1 is a range from the control start position SP1 to the corner corresponding position KP1. The tool path control range CD2 is a range from the control start position SP2 to the corner corresponding position KP2. The tool path control range CD3 is a range from the control start position SP3 to the corner corresponding position KP3.
　ＣＡＭ装置２１は工具軌跡制御比率ＣＲを任意の値に設定することができる。工具軌跡制御比率ＣＲは、角部対応位置ＫＰにおける工具軌跡ＴＰの工具径ＴＤｋを、制御開始位置ＳＰにおける工具軌跡ＴＰの工具径ＴＤｓ（設計値）で除算した値（ＣＲ＝ＴＤｋ／ＴＤｓ）に相当する。なお、工具軌跡制御比率ＣＲをパーセントで示す場合はＣＲ（％）＝（ＴＤｋ／ＴＤｓ）×１００となる。 The CAM device 21 can set the tool path control ratio CR to an arbitrary value. The tool path control ratio CR is a value obtained by dividing the tool diameter TDk of the tool path TP at the corner corresponding position KP by the tool diameter TDs (design value) of the tool path TP at the control start position SP (CR = TDk / TDs). Equivalent to. When the tool path control ratio CR is expressed in percent, CR (%) = (TDk / TDs) × 100.
　図５、図６、及び、図７を用いて工具軌跡ＴＰの制御方法を実施例１、実施例２、及び、実施例３として説明する。 A method for controlling the tool path TP will be described as a first embodiment, a second embodiment, and a third embodiment with reference to FIGS. 5, 6, and 7.
　図５は、ノズル１０６がＸ方向に移動し、さらにＹ方向に移動する状態を示している。図５に一点鎖線で示す符号ＮＰ１はノズル軌跡を示し、かつ、工具軌跡ＴＰの制御中心点ＣＬの軌跡を示している。図５は、工具軌跡制御情報に工具軌跡制御範囲ＣＤ１と工具軌跡制御比率ＣＲ１とが設定されている場合を示している。工具軌跡制御比率ＣＲ１は上記の工具軌跡制御比率ＣＲに相当する。 FIG. 5 shows a state where the nozzle 106 moves in the X direction and further moves in the Y direction. A symbol NP1 indicated by a one-dot chain line in FIG. 5 indicates a nozzle locus, and also indicates a locus of the control center point CL of the tool locus TP. FIG. 5 shows a case where the tool path control range CD1 and the tool path control ratio CR1 are set in the tool path control information. The tool path control ratio CR1 corresponds to the tool path control ratio CR described above.
　図５は、工具軌跡制御比率ＣＲ１が最小となるように設定されている場合を示している。工具軌跡制御比率ＣＲ１が最小となる場合とは、角部対応位置ＫＰ１における工具軌跡ＴＰの工具径ＴＤｋがビームスポットＢＳのビーム径、具体的にはビームスポットＢＳのビームウェスト径となる場合である。例えば、工具径ＴＤｓを１００μｍに設定し、工具径ＴＤｋを３０μｍ（＝ビームウェスト径）に設定する場合、工具軌跡制御比率ＣＲ１は３０％に設定される。なお、デフォーカスされたレーザビームで加工対象物Ｗを切削加工する場合には、工具軌跡ＴＰの工具径ＴＤｋはデフォーカスされたレーザビームのビーム径となる。 FIG. 5 shows a case where the tool path control ratio CR1 is set to be minimum. The case where the tool path control ratio CR1 is the minimum is a case where the tool diameter TDk of the tool path TP at the corner corresponding position KP1 is the beam diameter of the beam spot BS, specifically, the beam waist diameter of the beam spot BS. . For example, when the tool diameter TDs is set to 100 μm and the tool diameter TDk is set to 30 μm (= beam waist diameter), the tool path control ratio CR1 is set to 30%. Note that when the workpiece W is cut with a defocused laser beam, the tool diameter TDk of the tool locus TP is the beam diameter of the defocused laser beam.
　加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合、工具径補正量演算部２０１は、工具軌跡制御比率ＣＲ１に基づいて、制御開始位置ＳＰ１における工具軌跡ＴＰの工具径ＴＤｓが角部対応位置ＫＰ１で目的の工具径ＴＤｋとなるように、工具軌跡制御範囲ＣＤ１において工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正するための工具径補正情報ＴＣを生成する。さらに、工具径補正量演算部２０１は、工具軌跡制御比率ＣＲ１に応じて、工具軌跡ＴＰの工具径ＴＤに対応する工具径補正値ＭＶＬｘ及びＭＶＲｘを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。 When the tool path control information set to control the tool path TP is included in the machining condition CP, the tool radius correction amount calculation unit 201 determines the tool at the control start position SP1 based on the tool path control ratio CR1. Tool diameter correction for correcting the tool diameter TD of the tool path TP continuously or stepwise in the tool path control range CD1 so that the tool diameter TDs of the path TP becomes the target tool diameter TDk at the corner corresponding position KP1. Information TC is generated. Further, the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR1. TC is generated.
　工具径補正量演算部２０１は、工具軌跡ＴＰの加工面形成位置ＭＰＬｙが角部対応位置ＫＰ１に到達した後に、工具軌跡ＴＰの工具径ＴＤｋが設計値の工具径ＴＤｓとなるように、工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正するための工具径補正情報ＴＣを生成する。さらに、工具径補正量演算部２０１は、工具軌跡ＴＰの工具径ＴＤに対応させて工具径補正値ＭＶＬｙ及びＭＶＲｙを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。工具径補正量演算部２０１は、工具径補正情報ＴＣを加工軌跡演算部２０２へ出力する。 The tool radius correction amount calculation unit 201 sets the tool path so that the tool diameter TDk of the tool path TP becomes the designed tool diameter TDs after the machining surface formation position MPLy of the tool path TP reaches the corner corresponding position KP1. Tool diameter correction information TC for correcting the tool diameter TD of the TP continuously or stepwise is generated. Further, the tool radius correction amount calculation unit 201 generates tool radius correction information TC that changes the tool radius correction values MVLy and MVRy continuously or stepwise in accordance with the tool radius TD of the tool path TP. The tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
　加工軌跡演算部２０２は、加工プログラムＰＰに含まれているＧコードを翻訳する。加工軌跡演算部２０２は、翻訳結果に基づいて、左工具径補正にて切削加工するか、右工具径補正にて切削加工するかのいずれかの切削加工補正条件を決定する。 The machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
　左工具径補正にて切削加工すると決定された場合、加工軌跡演算部２０２は、工具径補正情報ＴＣに基づいて、工具軌跡制御範囲ＣＤ1において工具軌跡ＴＰ及び工具径補正値ＭＶＬｘを連続的または段階的に変化させるための第１の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。 When it is determined that the machining is performed with the left tool radius correction, the machining locus calculation unit 202 continuously or steps the tool locus TP and the tool radius correction value MVLx in the tool locus control range CD1 based on the tool radius correction information TC. The tool radius correction control signal TS including the first tool path control information for changing automatically is generated.
　また、加工軌跡演算部２０２は、工具軌跡ＴＰの加工面形成位置ＭＰＬｙが角部対応位置ＫＰ１に到達した後に、工具軌跡ＴＰ及び工具径補正値ＭＶＬｙを連続的または段階的に変化させるための第２の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。即ち、工具径補正量演算部２０１は、第１及び第２の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。 Further, the machining locus calculation unit 202 changes the tool locus TP and the tool radius correction value MVLy continuously or stepwise after the machining surface forming position MPLy of the tool locus TP reaches the corner corresponding position KP1. The tool radius correction control signal TS including the tool path control information of 2 is generated. That is, the tool radius correction amount calculation unit 201 generates a tool radius correction control signal TS including first and second tool path control information.
　加工軌跡演算部２０２は、工具径補正制御信号ＴＳを駆動制御部２０３へ出力する。駆動制御部２０３は、工具径補正制御信号ＴＳに基づいて駆動制御信号ＣＳを生成する。駆動制御部２０３は、駆動制御信号ＣＳにより、加工機本体１００を制御する。加工機本体１００は、駆動制御信号ＣＳに基づいて、Ｘ軸キャリッジ１０２及びＹ軸キャリッジ１０３を駆動させてノズル軌跡ＮＰ１を制御する。また、加工機本体１００は、駆動制御信号ＣＳに基づいて、工具軌跡制御部３００を駆動させて工具軌跡ＴＰを制御する。 The machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS. The drive control unit 203 controls the processing machine body 100 with a drive control signal CS. Based on the drive control signal CS, the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP1. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
　加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合、加工機本体１００は、駆動制御信号ＣＳに基づいて、加工面形成位置ＭＰＬｘまたはＭＰＬｙが最終加工製品の外形線に沿って移動するように、制御中心点ＣＬを基準として工具軌跡ＴＰを制御する。これにより、工具軌跡ＴＰの工具径ＴＤは、工具軌跡制御範囲ＣＤ1において、工具径補正値ＭＶＬｘ及びＭＶＬｙが工具軌跡制御比率ＣＲ１に応じて連続的または段階的に変化するように補正される。 When the tool path control information set to control the tool path TP is included in the processing condition CP, the processing machine main body 100 determines that the processing surface formation position MPLx or MPLy is the final processing based on the drive control signal CS. The tool trajectory TP is controlled based on the control center point CL so as to move along the outline of the product. As a result, the tool diameter TD of the tool path TP is corrected so that the tool diameter correction values MVLx and MVLy change continuously or stepwise according to the tool path control ratio CR1 in the tool path control range CD1.
　また、加工機本体１００は、駆動制御信号ＣＳに基づいて、加工面形成位置ＭＰＬｘまたはＭＰＬｙが最終加工製品の外形線に沿って移動し、かつ、加工対象物Ｗにおける最終加工製品の角部に対応する角部対応位置ＫＰ１において工具軌跡ＴＰが目的の工具径ＴＤとなるように、制御中心点ＣＬを基準として工具軌跡ＴＰを制御する。これにより、工具軌跡ＴＰの工具径ＴＤは、工具径補正値ＭＶＬｘまたはＭＶＬｙが工具軌跡制御比率ＣＲ１に応じて連続的または段階的に変化するように補正される。 Further, the processing machine main body 100 moves the machining surface formation position MPLx or MPLy along the outline of the final processed product based on the drive control signal CS, and at the corner of the final processed product in the workpiece W. The tool path TP is controlled on the basis of the control center point CL so that the tool path TP becomes the target tool diameter TD at the corresponding corner corresponding position KP1. Thereby, the tool diameter TD of the tool path TP is corrected so that the tool diameter correction value MVLx or MVLy changes continuously or stepwise according to the tool path control ratio CR1.
　工具軌跡制御比率ＣＲ１が最小となるように設定されている場合、図５に示すように、角部対応位置ＫＰ１における工具軌跡ＴＰはビームスポットＢＳとなる。これにより、最終加工製品の角部は、最小の工具径ＴＤを有する工具軌跡ＴＰにより形成される。そのため、工具軌跡ＴＰを制御しない場合と比較して、角部における未切削領域ＵＡを低減することができる。 When the tool path control ratio CR1 is set to be the minimum, the tool path TP at the corner corresponding position KP1 becomes a beam spot BS as shown in FIG. Thereby, the corner of the final processed product is formed by the tool trajectory TP having the minimum tool diameter TD. Therefore, the uncut area UA at the corner can be reduced as compared with the case where the tool path TP is not controlled.
　図６は、ノズル１０６がＸ方向に移動し、さらにＹ方向に移動する状態を示している。図６に一点鎖線で示す符号ＮＰ２はノズル軌跡を示し、かつ、工具軌跡ＴＰの制御中心点ＣＬの軌跡を示している。図６は、工具軌跡制御情報に工具軌跡制御範囲ＣＤ２と工具軌跡制御比率ＣＲ２とが設定されている場合を示している。工具軌跡制御比率ＣＲ２は上記の工具軌跡制御比率ＣＲに相当する。 FIG. 6 shows a state where the nozzle 106 moves in the X direction and further moves in the Y direction. A symbol NP2 indicated by a one-dot chain line in FIG. 6 indicates a nozzle locus, and also indicates a locus of the control center point CL of the tool locus TP. FIG. 6 shows a case where the tool path control range CD2 and the tool path control ratio CR2 are set in the tool path control information. The tool path control ratio CR2 corresponds to the tool path control ratio CR described above.
　図６は、工具軌跡制御比率ＣＲ２が任意の値（ｇ％）に設定されている場合を示している。工具軌跡制御比率ＣＲ２がｇ％となる場合とは、角部対応位置ＫＰ２における工具軌跡ＴＰの工具径ＴＤｋが、制御開始位置ＳＰ２における工具軌跡ＴＰの工具径ＴＤｓのｇ％となる場合である。 FIG. 6 shows a case where the tool path control ratio CR2 is set to an arbitrary value (g%). The case where the tool path control ratio CR2 is g% is a case where the tool diameter TDk of the tool path TP at the corner corresponding position KP2 is g% of the tool diameter TDs of the tool path TP at the control start position SP2.
　加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合、工具径補正量演算部２０１は、工具軌跡制御比率ＣＲ２に基づいて、制御開始位置ＳＰ２における工具軌跡ＴＰの工具径ＴＤｓ（設計値）が角部対応位置ＫＰ２で目的の工具径ＴＤｋとなるように、工具軌跡制御範囲ＣＤ２において工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正するための工具径補正情報ＴＣを生成する。さらに、工具径補正量演算部２０１は、工具軌跡制御比率ＣＲ２に応じて、工具軌跡ＴＰの工具径ＴＤに対応する工具径補正値ＭＶＬｘ及びＭＶＲｘを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。 When the tool path control information set to control the tool path TP is included in the machining condition CP, the tool radius correction amount calculation unit 201 determines the tool at the control start position SP2 based on the tool path control ratio CR2. To continuously or stepwise correct the tool diameter TD of the tool path TP in the tool path control range CD2 so that the tool diameter TDs (design value) of the path TP becomes the target tool diameter TDk at the corner corresponding position KP2. Tool radius correction information TC is generated. Further, the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR2. TC is generated.
　工具径補正量演算部２０１は、工具軌跡ＴＰの加工面形成位置ＭＰＬｙが角部対応位置ＫＰ２に到達した後に、工具軌跡ＴＰの工具径ＴＤｋが設計値の工具径ＴＤｓとなるように、工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正するための工具径補正情報ＴＣを生成する。さらに、工具径補正量演算部２０１は、工具軌跡ＴＰの工具径ＴＤに対応させて工具径補正値ＭＶＬｙ及びＭＶＲｙを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。工具径補正量演算部２０１は、工具径補正情報ＴＣを加工軌跡演算部２０２へ出力する。 The tool radius correction amount calculation unit 201 sets the tool path so that the tool diameter TDk of the tool path TP becomes the designed tool diameter TDs after the machining surface formation position MPLy of the tool path TP reaches the corner corresponding position KP2. Tool diameter correction information TC for correcting the tool diameter TD of the TP continuously or stepwise is generated. Further, the tool radius correction amount calculation unit 201 generates tool radius correction information TC that changes the tool radius correction values MVLy and MVRy continuously or stepwise in accordance with the tool radius TD of the tool path TP. The tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
　加工軌跡演算部２０２は、加工プログラムＰＰに含まれているＧコードを翻訳する。加工軌跡演算部２０２は、翻訳結果に基づいて、左工具径補正にて切削加工するか、右工具径補正にて切削加工するかのいずれかの切削加工補正条件を決定する。 The machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
　左工具径補正にて切削加工すると決定された場合、加工軌跡演算部２０２は、工具径補正情報ＴＣに基づいて、工具軌跡制御範囲ＣＤ２において工具軌跡ＴＰ及び工具径補正値ＭＶＬｘを連続的または段階的に変化させるための第３の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。 When it is determined that the cutting is performed with the left tool radius correction, the machining locus calculation unit 202 continuously or steps the tool locus TP and the tool radius correction value MVLx in the tool locus control range CD2 based on the tool radius correction information TC. A tool radius correction control signal TS including the third tool path control information for changing the position is generated.
　また、加工軌跡演算部２０２は、工具軌跡ＴＰの加工面形成位置ＭＰＬｙが角部対応位置ＫＰ２に到達した後に、工具軌跡ＴＰ及び工具径補正値ＭＶＬｙを連続的または段階的に変化させるための第４の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。即ち、工具径補正量演算部２０１は、第３及び第４の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。 Further, the machining locus calculation unit 202 changes the tool locus TP and the tool radius correction value MVLy continuously or stepwise after the machining surface forming position MPLy of the tool locus TP reaches the corner corresponding position KP2. 4 generates a tool radius correction control signal TS including the tool path control information. That is, the tool radius correction amount calculation unit 201 generates the tool radius correction control signal TS including the third and fourth tool path control information.
　加工軌跡演算部２０２は、工具径補正制御信号ＴＳを駆動制御部２０３へ出力する。駆動制御部２０３は、工具径補正制御信号ＴＳに基づいて駆動制御信号ＣＳを生成する。駆動制御部２０３は、駆動制御信号ＣＳにより、加工機本体１００を制御する。加工機本体１００は、駆動制御信号ＣＳに基づいて、Ｘ軸キャリッジ１０２及びＹ軸キャリッジ１０３を駆動させてノズル軌跡ＮＰ１を制御する。また、加工機本体１００は、駆動制御信号ＣＳに基づいて、工具軌跡制御部３００を駆動させて工具軌跡ＴＰを制御する。 The machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS. The drive control unit 203 controls the processing machine body 100 with a drive control signal CS. Based on the drive control signal CS, the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP1. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
　加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合、加工機本体１００は、駆動制御信号ＣＳに基づいて、加工面形成位置ＭＰＬｘまたはＭＰＬｙが最終加工製品の外形線に沿って移動するように、制御中心点ＣＬを基準として工具軌跡ＴＰを制御する。これにより、工具軌跡ＴＰの工具径ＴＤは、工具軌跡制御範囲ＣＤ２において、工具径補正値ＭＶＬｘ及びＭＶＬｙが工具軌跡制御比率ＣＲ２に応じて連続的または段階的に変化するように補正される。 When the tool path control information set to control the tool path TP is included in the processing condition CP, the processing machine main body 100 determines that the processing surface formation position MPLx or MPLy is the final processing based on the drive control signal CS. The tool trajectory TP is controlled based on the control center point CL so as to move along the outline of the product. Thereby, the tool diameter TD of the tool path TP is corrected so that the tool diameter correction values MVLx and MVLy change continuously or stepwise in the tool path control range CD2 in accordance with the tool path control ratio CR2.
　また、加工機本体１００は、駆動制御信号ＣＳに基づいて、加工面形成位置ＭＰＬｘまたはＭＰＬｙが最終加工製品の外形線に沿って移動し、かつ、加工対象物Ｗにおける最終加工製品の角部に対応する角部対応位置ＫＰ２において工具軌跡ＴＰが目的の工具径ＴＤとなるように、制御中心点ＣＬを基準として工具軌跡ＴＰを制御する。これにより、工具軌跡ＴＰの工具径ＴＤは、工具径補正値ＭＶＬｘまたはＭＶＬｙが工具軌跡制御比率ＣＲ２に応じて連続的または段階的に変化するように補正される。 Further, the processing machine main body 100 moves the machining surface formation position MPLx or MPLy along the outline of the final processed product based on the drive control signal CS, and at the corner of the final processed product in the workpiece W. The tool trajectory TP is controlled on the basis of the control center point CL so that the tool trajectory TP becomes the target tool diameter TD at the corresponding corner corresponding position KP2. Thereby, the tool diameter TD of the tool path TP is corrected so that the tool diameter correction value MVLx or MVLy changes continuously or stepwise according to the tool path control ratio CR2.
　図６に示すように、最終加工製品の角部は、工具軌跡制御比率ＣＲ２（ＣＲ２＝ｇ％）に応じて制御された工具径ＴＤを有する工具軌跡ＴＰにより形成される。そのため、工具軌跡ＴＰを制御しない場合と比較して、角部における未切削領域ＵＡを低減することができる。 As shown in FIG. 6, the corner of the final processed product is formed by a tool path TP having a tool diameter TD controlled according to the tool path control ratio CR2 (CR2 = g%). Therefore, the uncut area UA at the corner can be reduced as compared with the case where the tool path TP is not controlled.
　図７は、ノズル１０６がＸ方向に移動し、さらにＹ方向に移動する状態を示している。図７に一点鎖線で示す符号ＮＰ３はノズル軌跡を示し、符号ＣＬ３は工具軌跡ＴＰの制御中心点ＣＬの軌跡を示している。図７は、工具軌跡制御情報に工具軌跡制御範囲ＣＤ３と工具軌跡制御比率ＣＲ３とが設定されている場合を示している。工具軌跡制御比率ＣＲ３は上記の工具軌跡制御比率ＣＲに相当する。 FIG. 7 shows a state where the nozzle 106 moves in the X direction and further moves in the Y direction. A reference numeral NP3 indicated by a one-dot chain line in FIG. 7 indicates a nozzle locus, and a reference CL3 indicates a locus of the control center point CL of the tool locus TP. FIG. 7 shows a case where the tool path control range CD3 and the tool path control ratio CR3 are set in the tool path control information. The tool path control ratio CR3 corresponds to the tool path control ratio CR described above.
　図７は、工具軌跡制御比率ＣＲ３が最小となるように設定されている場合を示している。工具軌跡制御比率ＣＲ３が最小となる場合とは、角部対応位置ＫＰ３における工具軌跡ＴＰの工具径ＴＤｋがビームスポットＢＳのビーム径、具体的にはビームスポットＢＳのビームウェスト径となる場合である。 FIG. 7 shows a case where the tool path control ratio CR3 is set to be minimum. The case where the tool path control ratio CR3 is the minimum is a case where the tool diameter TDk of the tool path TP at the corner corresponding position KP3 is the beam diameter of the beam spot BS, specifically, the beam waist diameter of the beam spot BS. .
　例えば、工具径ＴＤｓが１００μｍであり、工具径ＴＤｋを３０μｍ（＝ビームウェスト径）に設定する場合、工具軌跡制御比率ＣＲ３は３０％に設定される。なお、デフォーカスされたレーザビームで加工対象物Ｗを切削加工する場合には、工具軌跡ＴＰの工具径ＴＤｋはデフォーカスされたレーザビームのビーム径となる。図７は、工具軌跡制御範囲ＣＤ３を含む、工具軌跡ＴＰを制御する範囲において、制御中心点ＣＬがノズル中心点ＣＮと一致しない場合を示している。 For example, when the tool diameter TDs is 100 μm and the tool diameter TDk is set to 30 μm (= beam waist diameter), the tool path control ratio CR3 is set to 30%. Note that when the workpiece W is cut with a defocused laser beam, the tool diameter TDk of the tool locus TP is the beam diameter of the defocused laser beam. FIG. 7 shows a case where the control center point CL does not coincide with the nozzle center point CN in the range in which the tool path TP is controlled, including the tool path control range CD3.
　加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合、工具径補正量演算部２０１は、工具軌跡制御範囲ＣＤ３において、ノズル１０６の工具径を一定とする工具径補正情報ＴＣを生成する。工具径補正量演算部２０１は、工具軌跡制御範囲ＣＤ３において、工具軌跡制御比率ＣＲ３に基づいて、制御開始位置ＳＰ３における工具軌跡ＴＰの工具径ＴＤｓが角部対応位置ＫＰ３で目的の工具径ＴＤｋとなる工具径補正情報ＴＣを生成する。 When the tool path control information set to control the tool path TP is included in the machining condition CP, the tool radius correction amount calculation unit 201 sets the tool diameter of the nozzle 106 to be constant in the tool path control range CD3. Tool radius correction information TC to be generated is generated. Based on the tool path control ratio CR3, the tool diameter correction amount calculation unit 201 determines that the tool diameter TDs of the tool path TP at the control start position SP3 is the target tool diameter TDk at the corner corresponding position KP3 in the tool path control range CD3. The tool radius correction information TC is generated.
　具体的には、工具径補正量演算部２０１は、工具軌跡制御範囲ＣＤ３において、工具軌跡制御比率ＣＲ３に基づいて、工具軌跡制御範囲ＣＤ３において工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正し、かつ、制御中心点ＣＬをノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動させる工具径補正情報ＴＣを生成する。 Specifically, the tool diameter correction amount calculation unit 201 continuously or stepwise sets the tool diameter TD of the tool path TP in the tool path control range CD3 based on the tool path control ratio CR3 in the tool path control range CD3. Tool radius correction information TC is generated that corrects and moves the control center point CL continuously or stepwise in the cutting direction DT with respect to the nozzle center point CN.
　さらに、工具径補正量演算部２０１は、工具軌跡制御比率ＣＲ３に応じて、工具軌跡ＴＰの工具径ＴＤに対応する工具径補正値ＭＶＬｘ及びＭＶＲｘを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。 Further, the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR3. TC is generated.
　工具径補正量演算部２０１は、工具軌跡ＴＰの加工面形成位置ＭＰＬｙが角部対応位置ＫＰ１に到達した後に、ノズル１０６の工具径を一定とする工具径補正情報ＴＣを生成する。工具径補正量演算部２０１は、工具軌跡ＴＰの工具径ＴＤｋが設計値の工具径ＴＤｓとなる工具径補正情報ＴＣを生成する。 The tool radius correction amount calculation unit 201 generates tool radius correction information TC that makes the tool radius of the nozzle 106 constant after the machining surface formation position MPLy of the tool trajectory TP reaches the corner corresponding position KP1. The tool radius correction amount calculation unit 201 generates tool radius correction information TC in which the tool radius TDk of the tool trajectory TP becomes the designed tool radius TDs.
　具体的には、工具径補正量演算部２０１は、工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正し、かつ、制御中心点ＣＬをノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動させる工具径補正情報ＴＣを生成する。 Specifically, the tool radius correction amount calculation unit 201 corrects the tool radius TD of the tool trajectory TP continuously or stepwise, and the cutting direction of the control center point CL with respect to the nozzle center point CN. Tool radius correction information TC to be moved continuously or stepwise by DT is generated.
　さらに、工具径補正量演算部２０１は、工具軌跡ＴＰの工具径ＴＤに対応させて工具径補正値ＭＶＬｙ及びＭＶＲｙを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。工具径補正量演算部２０１は、工具径補正情報ＴＣを加工軌跡演算部２０２へ出力する。 Further, the tool radius correction amount calculation unit 201 generates tool radius correction information TC that changes the tool radius correction values MVLy and MVRy continuously or stepwise in accordance with the tool radius TD of the tool path TP. The tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
　加工軌跡演算部２０２は、加工プログラムＰＰに含まれているＧコードを翻訳する。加工軌跡演算部２０２は、翻訳結果に基づいて、左工具径補正にて切削加工するか、右工具径補正にて切削加工するかのいずれかの切削加工補正条件を決定する。 The machining locus calculation unit 202 translates the G code included in the machining program PP. Based on the translation result, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction.
　左工具径補正にて切削加工すると決定された場合、加工軌跡演算部２０２は、工具径補正情報ＴＣに基づいて、工具軌跡制御範囲ＣＤ３において、ノズル１０６の工具径を一定とし、かつ、工具軌跡ＴＰ及び工具径補正値ＭＶＬｘを連続的または段階的に変化させ、かつ、制御中心点ＣＬをノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動させるための第５の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。 When it is determined to perform the cutting with the left tool radius correction, the machining locus calculation unit 202 makes the tool radius of the nozzle 106 constant in the tool locus control range CD3 based on the tool radius correction information TC, and the tool locus. A fifth for changing the TP and the tool diameter correction value MVLx continuously or stepwise and moving the control center point CL in the cutting progress direction DT with respect to the nozzle center point CN continuously or stepwise. A tool radius correction control signal TS including the tool path control information is generated.
　また、加工軌跡演算部２０２は、工具軌跡ＴＰの加工面形成位置ＭＰＬｙが角部対応位置ＫＰ３に到達した後に、ノズル１０６の工具径を一定とし、かつ、工具軌跡ＴＰ及び工具径補正値ＭＶＬｙを連続的または段階的に変化させ、かつ、制御中心点ＣＬをノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動させるための第６の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。即ち、工具径補正量演算部２０１は、第５及び第６の工具軌跡制御情報を含む工具径補正制御信号ＴＳを生成する。 Further, the machining locus calculation unit 202 makes the tool radius of the nozzle 106 constant after the machining surface formation position MPLy of the tool locus TP reaches the corner corresponding position KP3, and sets the tool locus TP and the tool radius correction value MVly. A tool including sixth tool path control information for changing continuously or stepwise and moving the control center point CL with respect to the nozzle center point CN in the cutting progress direction DT continuously or stepwise. A diameter correction control signal TS is generated. That is, the tool radius correction amount calculation unit 201 generates a tool radius correction control signal TS including the fifth and sixth tool path control information.
　加工軌跡演算部２０２は、工具径補正制御信号ＴＳを駆動制御部２０３へ出力する。駆動制御部２０３は、工具径補正制御信号ＴＳに基づいて駆動制御信号ＣＳを生成する。駆動制御部２０３は、駆動制御信号ＣＳにより、加工機本体１００を制御する。加工機本体１００は、駆動制御信号ＣＳに基づいて、Ｘ軸キャリッジ１０２及びＹ軸キャリッジ１０３を駆動させてノズル軌跡ＮＰ３を制御する。また、加工機本体１００は、駆動制御信号ＣＳに基づいて、工具軌跡制御部３００を駆動させて工具軌跡ＴＰを制御する。 The machining locus calculation unit 202 outputs a tool radius 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 radius correction control signal TS. The drive control unit 203 controls the processing machine body 100 with a drive control signal CS. Based on the drive control signal CS, the processing machine main body 100 drives the X-axis carriage 102 and the Y-axis carriage 103 to control the nozzle locus NP3. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
　加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合、加工機本体１００は、駆動制御信号ＣＳに基づいて、ノズル１０６の工具径を一定とし、かつ、加工面形成位置ＭＰＬｘまたはＭＰＬｙが最終加工製品の外形線に沿って移動し、かつ、制御中心点ＣＬがノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動するように工具軌跡ＴＰを制御する。これにより、工具軌跡ＴＰの工具径ＴＤは、工具軌跡制御範囲ＣＤ３において、工具径補正値ＭＶＬｘ及びＭＶＬｙが工具軌跡制御比率ＣＲ３に応じて連続的または段階的に変化するように補正される。 When the tool path control information set to control the tool path TP is included in the processing condition CP, the processing machine body 100 sets the tool diameter of the nozzle 106 constant based on the drive control signal CS, and The machining surface forming position MPLx or MPLy moves along the outline of the final processed product, and the control center point CL moves continuously or stepwise in the cutting direction DT with respect to the nozzle center point CN. Thus, the tool path TP is controlled. Thereby, the tool diameter TD of the tool path TP is corrected so that the tool diameter correction values MVLx and MVLy change continuously or stepwise in accordance with the tool path control ratio CR3 in the tool path control range CD3.
　また、加工機本体１００は、駆動制御信号ＣＳに基づいて、加工面形成位置ＭＰＬｘまたはＭＰＬｙが最終加工製品の外形線に沿って移動し、かつ、加工対象物Ｗにおける最終加工製品の角部に対応する角部対応位置ＫＰ３において、ノズル１０６の工具径を一定とし、かつ、工具軌跡ＴＰが目的の工具径ＴＤとなるように工具軌跡ＴＰを制御する。 Further, the processing machine main body 100 moves the machining surface formation position MPLx or MPLy along the outline of the final processed product based on the drive control signal CS, and at the corner of the final processed product in the workpiece W. At the corresponding corner corresponding position KP3, the tool path TP is controlled so that the tool diameter of the nozzle 106 is constant and the tool path TP becomes the target tool diameter TD.
　これにより、工具軌跡ＴＰの工具径ＴＤは、工具径補正値ＭＶＬｘまたはＭＶＬｙが工具軌跡制御比率ＣＲ３に応じて連続的または段階的に変化するように補正される。即ち、工具軌跡ＴＰを制御する範囲では、ノズル軌跡ＭＰ３と工具軌跡ＴＰの制御中心点ＣＬの軌跡ＣＬ３とは別々に制御されることになる。 Thereby, the tool diameter TD of the tool path TP is corrected so that the tool diameter correction value MVLx or MVLy changes continuously or stepwise according to the tool path control ratio CR3. That is, in the range in which the tool locus TP is controlled, the nozzle locus MP3 and the locus CL3 of the control center point CL of the tool locus TP are controlled separately.
　ノズル中心点ＣＮを通るノズル１０６の中心軸を親軸とすると、工具軌跡ＴＰを構成するレーザビームの光軸が子軸に相当する。即ち、工具軌跡ＴＰを制御する範囲において、親軸と子軸とは工具軌跡制御比率ＣＲ３に応じて軸分配される。 Suppose that the central axis of the nozzle 106 passing through the nozzle center point CN is the parent axis, the optical axis of the laser beam constituting the tool locus TP corresponds to the child axis. That is, in the range where the tool path TP is controlled, the parent axis and the child axis are distributed according to the tool path control ratio CR3.
　工具軌跡制御比率ＣＲ１が最小となるように設定されている場合、図７に示すように、角部対応位置ＫＰ３における工具軌跡ＴＰはビームスポットＢＳとなる。これにより、最終加工製品の角部は、最小の工具径ＴＤを有する工具軌跡ＴＰにより形成される。そのため、工具軌跡ＴＰを制御しない場合と比較して、角部における未切削領域ＵＡを低減することができる。 When the tool path control ratio CR1 is set to be minimum, the tool path TP at the corner corresponding position KP3 becomes a beam spot BS as shown in FIG. Thereby, the corner of the final processed product is formed by the tool trajectory TP having the minimum tool diameter TD. Therefore, the uncut area UA at the corner can be reduced as compared with the case where the tool path TP is not controlled.
　図８Ａ及び図８Ｂに示すフローチャートを用いて、切削加工方法の一例を説明する。ＣＡＤ装置２０は、図８Ａに示すフローチャートのステップＳ１にて、最終加工製品の寸法及び形状を含む製品形状情報に基づいて製品形状データＳＤを生成する。さらに、ＣＡＤ装置２０は、製品形状データＳＤをＣＡＭ装置２１へ出力する。 An example of the cutting method will be described using the flowcharts shown in FIGS. 8A and 8B. The CAD device 20 generates product shape data SD based on the product shape information including the size and shape of the final processed product in step S1 of the flowchart shown in FIG. 8A. Further, the CAD device 20 outputs the product shape data SD to the CAM device 21.
　ＣＡＭ装置２１は、ステップＳ２にて、製品形状データＳＤに基づいて、切削加工機１の加工プログラムＰＰ（Ｇコードを含む）を生成し、加工条件ＣＰを指定する。さらに、ＣＡＭ装置２１は加工プログラムＰＰと加工条件ＣＰとを切削加工機１のＮＣ装置２００へ出力する。 In 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.
　ＮＣ装置２００は、ステップＳ３にて、加工プログラムＰＰと加工条件ＣＰとに基づいて、加工機本体１００を制御してＸ軸キャリッジ１０２及びＹ軸キャリッジ１０３を駆動させることにより、ノズル１０６を目的の位置へ移動させる。また、ＮＣ装置２００は、ステップＳ４にて、加工プログラムＰＰと加工条件ＣＰとに基づいてレーザ発振器１０を制御することにより、レーザビームをノズル１０６の開口部１０５から射出し、加工対象物Ｗに照射する。ステップＳ３とステップＳ４とのタイミングは加工プログラムＰＰと加工条件ＣＰとに基づいて制御される。 In step S3, the NC device 200 controls the processing machine main body 100 based on the processing program PP and the processing condition CP to drive the X-axis carriage 102 and the Y-axis carriage 103, thereby setting the target nozzle 106. Move to position. Further, in step S4, the NC device 200 controls the laser oscillator 10 based on the machining program PP and the machining condition CP, thereby emitting a laser beam from the opening 105 of the nozzle 106 to the workpiece W. Irradiate. The timing of step S3 and step S4 is controlled based on the machining program PP and machining conditions CP.
　ＮＣ装置２００の工具径補正量演算部２０１、及び、加工軌跡演算部２０２には、ステップＳ２にてＣＡＭ装置２１から加工プログラムＰＰと加工条件ＣＰとが入力される。工具径補正量演算部２０１は、ステップＳ５にて、加工条件ＣＰに工具軌跡制御情報が含まれているか否かを認識する。 In step S2, the machining program PP and the machining condition CP are input from the CAM device 21 to the tool diameter correction amount computing unit 201 and the machining locus computing unit 202 of the NC device 200. In step S5, the tool radius correction amount calculation unit 201 recognizes whether or not the tool path control information is included in the machining condition CP.
　工具軌跡制御情報には、加工対象物Ｗに対して、最終加工製品の角部に対応する部分を切削加工するときに工具軌跡ＴＰを制御するか否かが設定されている。工具軌跡ＴＰを制御するように設定された工具軌跡制御情報には、工具軌跡制御範囲ＣＤと工具軌跡制御比率ＣＲとが設定されている。加工条件ＣＰに工具軌跡制御情報が含まれていると認識された場合、工具径補正量演算部２０１は、工具軌跡制御情報が工具軌跡ＴＰを制御するように設定されているか否かを認識する。 In the tool trajectory control information, whether or not to control the tool trajectory TP when cutting a portion corresponding to the corner of the final processed product is set for the workpiece W. In the tool path control information set to control the tool path TP, a tool path control range CD and a tool path control ratio CR are set. When it is recognized that the tool path control information is included in the machining condition CP, the tool radius correction amount calculation unit 201 recognizes whether or not the tool path control information is set to control the tool path TP. .
　加工条件ＣＰに工具軌跡制御情報が含まれていないと認識された場合、または、加工条件ＣＰに工具軌跡制御情報が含まれていると認識され、かつ、工具軌跡制御情報が工具軌跡を制御しないように設定されている場合、工具径補正量演算部２０１は、工具軌跡ＴＰの工具径を固定する。これにより、工具軌跡ＴＰの工具径に対応する工具径補正値ＭＶＬ及びＭＶＲは固定される。 When it is recognized that the tool path control information is not included in the machining condition CP, or it is recognized that the tool path control information is included in the machining condition CP, and the tool path control information does not control the tool path. In such a case, the tool radius correction amount calculation unit 201 fixes the tool radius of the tool path TP. Thereby, the tool radius correction values MVL and MVR corresponding to the tool radius of the tool path TP are fixed.
　工具径補正量演算部２０１は、ステップＳ６にて、加工プログラムＰＰと加工条件ＣＰとに基づいて、工具軌跡ＴＰと、工具軌跡ＴＰにおける制御中心点ＣＬと工具径補正値ＭＶＬ及びＭＶＲと加工面形成位置ＭＰＬ及びＭＰＲとを含む工具径補正情報ＴＣを生成する。 In step S6, the tool radius correction amount calculation unit 201 determines the tool path TP, the control center point CL in the tool path TP, the tool radius correction values MVL and MVR, and the machining surface based on the machining program PP and the machining condition CP. Tool radius correction information TC including the formation positions MPL and MPR is generated.
　ステップＳ５にて加工条件ＣＰに工具軌跡制御情報が含まれていると認識され、かつ、工具軌跡制御情報が工具軌跡を制御するように設定されている場合、工具径補正量演算部２０１は、工具軌跡制御情報に含まれている工具軌跡制御範囲ＣＤと工具軌跡制御比率ＣＲとを認識する。 When it is recognized in step S5 that the tool path control information is included in the machining condition CP and the tool path control information is set to control the tool path, the tool radius correction amount calculation unit 201 The tool path control range CD and the tool path control ratio CR included in the tool path control information are recognized.
　工具径補正量演算部２０１は、ステップＳ６にて、工具軌跡制御比率ＣＲ１に基づいて、制御開始位置ＳＰにおける工具軌跡ＴＰの工具径ＴＤｓ（設計値）が角部対応位置ＫＰで目的の工具径ＴＤｋとなるように、工具軌跡制御範囲ＣＤにおいて工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正し、かつ、制御中心点ＣＬがノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動するための工具径補正情報ＴＣを生成する。 In step S6, the tool diameter correction amount calculation unit 201 determines that the tool diameter TDs (design value) of the tool path TP at the control start position SP is the target tool diameter at the corner corresponding position KP based on the tool path control ratio CR1. The tool diameter TD of the tool path TP is corrected continuously or stepwise in the tool path control range CD so as to be TDk, and the control center point CL is in the cutting progress direction DT with respect to the nozzle center point CN. Tool radius correction information TC for moving continuously or stepwise is generated.
　さらに、工具径補正量演算部２０１は、工具軌跡制御比率ＣＲに応じて、工具軌跡ＴＰの工具径に対応する工具径補正値ＭＶＬｘ及びＭＶＲｘを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。 Further, the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLx and MVRx corresponding to the tool radius of the tool path TP continuously or stepwise according to the tool path control ratio CR. Is generated.
　工具径補正量演算部２０１は、工具軌跡ＴＰの加工面形成位置ＭＰＬｙが角部対応位置ＫＰに到達した後に、工具軌跡ＴＰの工具径ＴＤｋが設計値の工具径ＴＤｓとなるように、工具軌跡ＴＰの工具径ＴＤを連続的または段階的に補正し、かつ、制御中心点ＣＬがノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動するための工具径補正情報ＴＣを生成する。 The tool radius correction amount calculation unit 201 sets the tool path so that the tool diameter TDk of the tool path TP becomes the designed tool diameter TDs after the machining surface formation position MPLy of the tool path TP reaches the corner corresponding position KP. Tool diameter correction information for correcting the tool diameter TD of the TP continuously or stepwise and for the control center point CL to move continuously or stepwise in the cutting progress direction DT with respect to the nozzle center point CN. TC is generated.
　さらに、工具径補正量演算部２０１は、工具軌跡制御比率ＣＲに応じて、工具軌跡ＴＰの工具径ＴＤに対応する工具径補正値ＭＶＬｙ及びＭＶＲｙを連続的または段階的に変化させる工具径補正情報ＴＣを生成する。工具径補正量演算部２０１は、工具径補正情報ＴＣを加工軌跡演算部２０２へ出力する。 Further, the tool radius correction amount calculation unit 201 changes the tool radius correction values MVLy and MVRy corresponding to the tool radius TD of the tool path TP continuously or stepwise according to the tool path control ratio CR. TC is generated. The tool radius correction amount calculation unit 201 outputs the tool radius correction information TC to the machining locus calculation unit 202.
　加工軌跡演算部２０２には、ステップＳ２にてＣＡＭ装置２１から加工プログラムＰＰと加工条件ＣＰとが入力され、ステップＳ６にて工具径補正量演算部２０１から工具径補正情報ＴＣが入力される。加工軌跡演算部２０２は、ステップＳ７にて、加工プログラムＰＰに含まれているＧコードを翻訳する。さらに、加工軌跡演算部２０２は、翻訳結果に基づいて、左工具径補正にて切削加工するか、右工具径補正にて切削加工するかのいずれかの切削加工補正条件を決定する。 In the machining locus calculation unit 202, the machining program PP and the machining condition CP are input from the CAM device 21 in step S2, and the tool radius correction information TC is input from the tool radius correction amount calculation unit 201 in step S6. In step S7, the machining locus calculation unit 202 translates the G code included in the machining program PP. Further, the machining locus calculation unit 202 determines a cutting correction condition for either cutting with the left tool radius correction or cutting with the right tool radius correction based on the translation result.
　加工軌跡演算部２０２は、図８Ｂに示すフローチャートのステップＳ８にて、加工プログラムＰＰと加工条件ＣＰと工具径補正情報ＴＣと決定された切削加工補正条件とに基づいて、工具径補正制御信号ＴＳを生成する。さらに、加工軌跡演算部２０２は、工具径補正制御信号ＴＳを駆動制御部２０３へ出力する。駆動制御部２０３は、ステップＳ９にて、工具径補正制御信号ＴＳに基づいて、加工機本体１００を制御する駆動制御信号ＣＳを生成する。さらに、駆動制御部２０３は駆動制御信号ＣＳを加工機本体１００へ出力する。 The machining locus calculation unit 202 performs the tool radius correction control signal TS on the basis of the machining program PP, the machining condition CP, the tool radius correction information TC, and the cutting machining correction condition determined in step S8 of the flowchart shown in FIG. 8B. Is generated. Further, the machining locus calculation unit 202 outputs a tool radius correction control signal TS to the drive control unit 203. In step S9, the drive control unit 203 generates a drive control signal CS for controlling the processing machine main body 100 based on the tool radius correction control signal TS. Further, the drive control unit 203 outputs a drive control signal CS to the processing machine body 100.
　加工機本体１００は、ステップＳ１０にて、駆動制御信号ＣＳに基づいて、Ｘ軸キャリッジ１０２及びＹ軸キャリッジ１０３を駆動させてノズル軌跡ＮＰを制御する。また、加工機本体１００は、駆動制御信号ＣＳに基づいて、工具軌跡制御部３００を駆動させて工具軌跡ＴＰを制御する。 In step S10, the processing machine main 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 locus NP. Further, the processing machine main body 100 controls the tool path TP by driving the tool path control unit 300 based on the drive control signal CS.
　ステップＳ５にて加工条件ＣＰに工具軌跡制御情報が含まれていないと認識された場合、または、加工条件ＣＰに工具軌跡制御情報が含まれていると認識され、かつ、工具軌跡制御情報が工具軌跡ＴＰを制御しないように設定されている場合、加工機本体１００は、ステップＳ１１にて、工具軌跡ＴＰの工具径を固定する。これにより、工具軌跡ＴＰの工具径に対応する工具径補正値ＭＶＬ及びＭＶＲは固定される。 When it is recognized in step S5 that the tool path control information is not included in the machining condition CP, or it is recognized that the tool path control information is included in the machining condition CP, and the tool path control information is the tool When it is set not to control the locus TP, the processing machine main body 100 fixes the tool diameter of the tool locus TP in step S11. Thereby, the tool radius correction values MVL and MVR corresponding to the tool radius of the tool path TP are fixed.
　ステップＳ５にて加工条件ＣＰに工具軌跡制御情報が含まれていると認識され、かつ、工具軌跡制御情報が工具軌跡ＴＰを制御するように設定されている場合、加工機本体１００は、ステップＳ１２にて、工具軌跡制御範囲ＣＤにおいて、加工面形成位置ＭＰＬまたはＭＰＲが最終加工製品の外形線に沿って移動し、かつ、工具軌跡制御比率ＣＲが連続的または段階的に変化するように、工具軌跡ＴＰの工具径ＴＤを制御する。 When it is recognized in step S5 that the tool path control information is included in the machining condition CP and the tool path control information is set to control the tool path TP, the processing machine main body 100 determines that the tool path control information is in step S12. In the tool path control range CD, the tool surface forming position MPL or MPR moves along the contour line of the final processed product, and the tool path control ratio CR changes continuously or stepwise. The tool diameter TD of the trajectory TP is controlled.
　さらに、加工機本体１００は、工具軌跡制御範囲ＣＤにおいて、制御中心点ＣＬがノズル中心点ＣＮに対して切削加工の進行方向ＤＴに連続的または段階的に移動するように、工具軌跡ＴＰを制御する。 Further, the processing machine body 100 controls the tool path TP so that the control center point CL moves continuously or stepwise in the cutting direction DT with respect to the nozzle center point CN in the tool path control range CD. To do.
　本実施形態の切削加工機及び切削加工方法では、工具軌跡ＴＰに基づく補正情報とノズル軌跡ＮＰに基づく補正情報とを含む工具径補正情報ＴＣを生成する。本実施形態の切削加工機及び切削加工方法では、工具径補正情報ＴＣに基づいて加工ユニット１０４の駆動と工具軌跡制御部３００の駆動とを制御することにより、ノズル軌跡ＮＰと工具軌跡ＴＰとを制御する。従って、本実施形態の切削加工機及び切削加工方法によれば、切削工具に相当する工具軌跡、または、ノズルと加工ステージとの相対位置が固定されている状態における切削加工跡が非円形状であっても、切削工具の工具径を精度よく補正することができる。 In the cutting machine and the cutting method of the present embodiment, tool radius correction information TC including correction information based on the tool trajectory TP and correction information based on the nozzle trajectory NP is generated. In the cutting machine and the cutting method of the present embodiment, the nozzle locus NP and the tool locus TP are obtained by controlling the drive of the machining unit 104 and the drive of the tool locus control unit 300 based on the tool radius correction information TC. Control. Therefore, according to the cutting machine and the cutting method of the present embodiment, the tool trace corresponding to the cutting tool or the cutting trace in a state where the relative position between the nozzle and the processing stage is fixed is non-circular. Even if it exists, the tool diameter of the cutting tool can be accurately corrected.
　加工条件ＣＰに、加工対象物Ｗに対して、最終加工製品の角部に対応する部分を切削加工するときに工具軌跡ＴＰを制御するか否かが設定された工具軌跡制御情報が含まれている場合がある。本実施形態の切削加工機及び切削加工方法では、加工条件ＣＰに工具軌跡制御情報が含まれていない場合、または、工具軌跡ＴＰを制御しないように設定された工具軌跡制御情報が含まれている場合には、工具軌跡ＴＰの工具径を固定する。 The machining condition CP includes tool path control information in which whether or not to control the tool path TP is set when cutting a portion corresponding to the corner of the final processed product with respect to the workpiece W. There may be. In the cutting machine and the cutting method according to the present embodiment, when the tool path control information is not included in the machining condition CP, or the tool path control information set so as not to control the tool path TP is included. In this case, the tool diameter of the tool path TP is fixed.
　本実施形態の切削加工機及び切削加工方法では、加工条件ＣＰに工具軌跡ＴＰを制御するように設定された工具軌跡制御情報が含まれている場合には、工具軌跡制御範囲ＣＤにおいて工具軌跡制御比率ＣＲが連続的または段階的に変化するように工具軌跡ＴＰの工具径ＴＤを制御する。 In the cutting machine and the cutting method according to the present embodiment, when the tool path control information set to control the tool path TP is included in the processing condition CP, the tool path control is performed in the tool path control range CD. The tool diameter TD of the tool path TP is controlled so that the ratio CR changes continuously or stepwise.
　従って、本実施形態の切削加工機及び切削加工方法によれば、工具軌跡ＴＰを制御することにより、最終加工製品の角部を目的の工具径により形成することができる。これにより、工具軌跡ＴＰを制御しない場合と比較して、最終加工製品の角部における未切削領域ＵＡを低減することができる。 Therefore, according to the cutting machine and the cutting method of the present embodiment, the corner portion of the final processed product can be formed with the target tool diameter by controlling the tool trajectory TP. Thereby, compared with the case where the tool locus | trajectory TP is not controlled, the uncut area | region UA in the corner | angular part of a final processed product can be reduced.
　本発明は以上説明した本実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において種々変更可能である。本実施形態の切削加工機及び切削加工方法では、レーザ加工機及びレーザ加工方法を例に挙げて説明したが、本発明は例えばウォータジェット加工機に対しても適用可能である。 The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the present invention. In the cutting machine and the cutting method of the present embodiment, the laser processing machine and the laser processing method have been described as examples. However, the present invention can be applied to, for example, a water jet processing machine.
　本願の開示は、２０１８年３月１２日に出願された特願２０１８－０４４１１６号に記載の主題と関連しており、それらの全ての開示内容は引用によりここに援用される。 The disclosure of the present application is related to the subject matter described in Japanese Patent Application No. 2018-04116 filed on Mar. 12, 2018, the entire disclosure content of which is incorporated herein by reference.

Claims (4)

  1. 　加工対象物を切削加工する加工機本体と、
    　前記加工機本体を制御するＮＣ装置と、
    　を備え、
    　前記ＮＣ装置は、
    　前記加工対象物を切削加工することによって得られる最終加工製品の寸法及び形状を含む製品形状情報に基づいて設定された加工プログラムと加工条件とに基づいて、前記加工対象物を切削加工する切削工具の工具径を補正するための工具径補正情報を生成する工具径補正量演算部と、
    　前記加工プログラムと前記加工条件と前記工具径補正情報とに基づいて、切削加工補正条件を含む工具径補正制御信号を生成する加工軌跡演算部と、
    　前記工具径補正制御信号に基づいて、前記加工機本体を制御する駆動制御信号を生成する駆動制御部と、
    　を有し、
    　前記加工機本体は、
    　前記加工対象物との相対位置を変化させることにより、前記加工対象物を切削加工する加工ユニットと、
    　前記駆動制御信号に基づいて、前記切削工具に相当し、かつ、非円形状を有する工具軌跡を制御する工具軌跡制御部と、
    　を有し、
    　前記加工対象物に対して前記最終加工製品の角部に対応する部分を切削加工するとき、前記加工条件に前記工具軌跡を制御するように設定された工具軌跡制御情報が含まれている場合に、
    　前記工具径補正量演算部は、前記工具軌跡の工具径を補正するための前記工具径補正情報を生成し、
    　前記加工機本体は、前記駆動制御信号に基づいて、前記加工対象物における前記最終加工製品の角部に対応する位置において前記工具軌跡が目的の工具径となるように前記工具軌跡を制御する
    　ことを特徴とする切削加工機。     A processing machine body for cutting a workpiece;
    An NC device for controlling the processing machine body;
    With
    The NC device
    A cutting tool for cutting the workpiece based on a machining program and machining conditions set based on product shape information including the size and shape of the final processed product obtained by cutting the workpiece. A tool radius correction amount calculation unit for generating tool radius correction information for correcting the tool radius of
    Based on the machining program, the machining conditions, and the tool radius correction information, a machining locus calculation unit that generates a tool radius correction control signal including a cutting correction condition;
    A drive control unit that generates a drive control signal for controlling the processing machine body based on the tool radius correction control signal;
    Have
    The processing machine body is
    A machining unit that cuts the workpiece by changing a relative position with the workpiece;
    A tool path control unit that controls a tool path corresponding to the cutting tool and having a non-circular shape based on the drive control signal;
    Have
    When cutting the portion corresponding to the corner of the final processed product with respect to the object to be processed, when the tool path control information set to control the tool path is included in the processing conditions ,
    The tool radius correction amount calculation unit generates the tool radius correction information for correcting the tool radius of the tool path,
    The processing machine body controls the tool path based on the drive control signal so that the tool path becomes a target tool diameter at a position corresponding to a corner of the final processed product in the processing target. Cutting machine characterized by.
  2. 　前記加工機本体は、前記ＮＣ装置により制御され、レーザビームを射出するレーザ発振器をさらに備え、
    　前記加工ユニットは、前記加工ユニットの先端部に取り付けられ、前記レーザビームを前記加工対象物に照射するための開口部が形成されたノズルを有し、
    　前記工具軌跡制御部は、前記加工ユニットの内部に収容され、前記開口部から射出されるレーザビームを非円形状の振動パターンで振動させることにより、前記工具軌跡を制御する
    　ことを特徴とする請求項１に記載の切削加工機。     The processing machine body further includes a laser oscillator that is controlled by the NC device and emits a laser beam,
    The processing unit has a nozzle that is attached to the tip of the processing unit and has an opening for irradiating the processing object with the laser beam.
    The tool trajectory control unit is housed in the machining unit and controls the tool trajectory by vibrating a laser beam emitted from the opening with a non-circular vibration pattern. Item 2. The cutting machine according to Item 1.
  3. 　加工対象物を切削加工することによって得られる最終加工製品の寸法及び形状を含む製品形状情報に基づいて設定された加工プログラムと加工条件とに基づいて、前記加工対象物を切削加工するための切削工具の工具径を補正するための工具径補正情報を生成し、
    　前記加工プログラムと前記加工条件と前記工具径補正情報とに基づいて工具径補正制御信号を生成し、
    　前記工具径補正制御信号に基づいて駆動制御信号を生成し、
    　前記加工条件に、前記加工対象物に対して、前記最終加工製品の角部に対応する部分を切削加工するときに前記切削工具に相当し、かつ、非円形状を有する工具軌跡を制御するように設定された工具軌跡制御情報が含まれている場合に、
    　前記工具軌跡の工具径を補正するための前記工具径補正情報を生成し、
    　前記駆動制御信号に基づいて、前記加工対象物における前記最終加工製品の角部に対応する位置において前記工具軌跡が目的の工具径となるように前記工具軌跡を制御する
    　ことを特徴とする切削加工方法。     Cutting for cutting the workpiece based on the machining program and machining conditions set based on the product shape information including the size and shape of the final processed product obtained by cutting the workpiece. Generate tool radius correction information to correct the tool radius of the tool,
    A tool radius correction control signal is generated based on the machining program, the machining conditions, and the tool radius correction information,
    A drive control signal is generated based on the tool radius correction control signal,
    The tool path corresponding to the cutting tool and having a non-circular shape is controlled when the portion corresponding to the corner of the final processed product is cut with respect to the workpiece under the machining conditions. If the tool path control information set in is included,
    Generating the tool radius correction information for correcting the tool radius of the tool path,
    Based on the drive control signal, the tool trajectory is controlled such that the tool trajectory has a target tool diameter at a position corresponding to a corner of the final processed product in the workpiece. Method.
  4. 　前記加工対象物にレーザビームを照射し、
    　前記レーザビームを非円形状の振動パターンで振動させることにより、前記工具軌跡を制御する
    　ことを特徴とする請求項３に記載の切削加工方法。     Irradiating the workpiece with a laser beam;
    The cutting method according to claim 3, wherein the tool trajectory is controlled by vibrating the laser beam in a non-circular vibration pattern.
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