WO2014068681A1 - ワイヤ放電加工装置および制御装置 - Google Patents
ワイヤ放電加工装置および制御装置 Download PDFInfo
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- WO2014068681A1 WO2014068681A1 PCT/JP2012/078067 JP2012078067W WO2014068681A1 WO 2014068681 A1 WO2014068681 A1 WO 2014068681A1 JP 2012078067 W JP2012078067 W JP 2012078067W WO 2014068681 A1 WO2014068681 A1 WO 2014068681A1
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- correction amount
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- wire electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/06—Control of the travel curve of the relative movement between electrode and workpiece
- B23H7/065—Electric circuits specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/08—Wire electrodes
- B23H7/10—Supporting, winding or electrical connection of wire-electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/08—Wire electrodes
- B23H7/10—Supporting, winding or electrical connection of wire-electrode
- B23H7/105—Wire guides
Definitions
- the present invention relates to a wire electric discharge machining apparatus and a control apparatus that reduce machining contour errors by correcting positional displacement of wire electrodes.
- a wire guide provided with a nozzle sends a machining fluid to the wire.
- This wire electrical discharge machining apparatus detects the amount of wire displacement caused by the pressure of the machining fluid, and determines the position correction amount of the wire from the detected amount of displacement. And the wire electric discharge machining apparatus corrects the relative position between the workpiece and the wire using the position correction amount, and thereby corrects the machining contour error (see, for example, Patent Document 1).
- the above-described conventional technique has a problem in that a high-precision machining contour error cannot be corrected because the positional displacement of the wire due to the elastic deformation of the wire guide depending on the wire tension is not taken into consideration.
- the processing removal amount at the time of finishing changes depending on the processing direction due to a machining contour error at the time of roughing. For this reason, there existed a problem that a processing speed will fall on the processing surface where processing removal amount becomes large, and a problem that processing surface accuracy deteriorated.
- the present invention has been made in view of the above, and an object thereof is to obtain a wire electric discharge machining apparatus and a control apparatus capable of highly accurate position error correction of a wire electrode.
- the present invention provides a first wire guide that supports a wire electrode at a first position and sends the wire electrode to a workpiece, and the first wire guide.
- a second wire guide that supports the wire electrode at a second position opposite to the position of the workpiece and winds up the wire electrode sent from the workpiece side, and moves the position of the first wire guide.
- the first drive unit that changes the relative position between the wire electrode and the workpiece and the position of the second wire guide are moved.
- a second drive unit that changes a relative position between the first drive unit and a first drive control unit that controls the first drive unit based on a machining shape of a portion that performs machining on the workpiece.
- the processed shape A processing condition including a second drive control unit for controlling the second drive unit, and a tension of the wire electrode stretched between the first wire guide and the second wire guide.
- a processing condition setting unit for setting the position, a correction amount storage unit for storing a position correction amount for the wire electrode corresponding to the processing condition in advance, and a position correction amount for the wire electrode corresponding to the processing condition.
- the first and second drive control units Based on the correction amount reading unit that reads from the correction amount storage unit and the position correction amount, the first and second drive control units correct the relative distance between the wire electrode and the workpiece. And a wire position correction unit.
- FIG. 1 is a diagram showing a configuration of a wire electric discharge machining apparatus according to the first embodiment.
- FIG. 2 is a diagram for explaining the position of the wire electrode that varies depending on the processing conditions.
- FIG. 3 is a schematic diagram for explaining the influence of the wire position displacement during the rough machining on the finishing machining.
- FIG. 4 is a diagram for explaining elastic deformation of the wire guide due to wire tension and machining fluid pressure.
- FIG. 5 is a diagram for explaining the influence of the working fluid reaction force when the distance between the nozzle of the wire guide and the workpiece is longer than a predetermined value.
- FIG. 6 is a diagram for explaining a processing error caused by the deformation of the wire electrode.
- FIG. 1 is a diagram showing a configuration of a wire electric discharge machining apparatus according to the first embodiment.
- FIG. 2 is a diagram for explaining the position of the wire electrode that varies depending on the processing conditions.
- FIG. 3 is a schematic diagram for explaining the influence of the wire position displacement during the rough
- FIG. 7 is a diagram for explaining elastic deformation of the workpiece due to the machining fluid reaction force.
- FIG. 8A is a diagram illustrating an example of a machining shape measurement result of a workpiece.
- FIG. 8B is a diagram illustrating an example of the wire position correction amount for each processing condition.
- FIG. 9 is a diagram for explaining the interpolation points of the machining conditions when the practical maximum and minimum values of the machining conditions are used as the actual measurement points of the wire position correction amount.
- FIG. 10 is a diagram for explaining the interpolation point of the machining condition when the practical center value of the machining condition is set as the actual measurement point of the wire position correction amount.
- FIG. 11 is a diagram for explaining a method of measuring the displacement amount of the wire guide.
- FIG. 12 is a diagram for explaining a method of measuring the displacement amount of the wire guide and the displacement amount of the workpiece.
- FIG. 13 is a diagram illustrating a configuration of a wire electric discharge machining apparatus according to the sixth embodiment
- FIG. 1 is a diagram showing a configuration of a wire electric discharge machining apparatus according to the first embodiment.
- the wire electrical discharge machining apparatus 1a is an apparatus that performs electrical discharge machining on the workpiece 14 by applying a voltage between the wire electrode 12 and the workpiece 14.
- the wire electric discharge machining apparatus 1a of the present embodiment takes into account the positional displacement of the wire electrode 12 resulting from the elastic deformation of the wire guides (upper wire guide 8a, lower wire guide 8b) depending on the wire tension. The relative position between 14 and the wire electrode 12 is corrected.
- the wire electric discharge machining apparatus 1 a includes a control device 10 and a machining unit 20.
- the control device 10 includes a machining condition setting unit 2, a correction amount storage unit 3, a correction amount reading unit 4, a wire position correction unit 5, drive control units 6a and 6b, a command generation unit 9, and a power control unit.
- the processing unit 20 includes drive units 7 a and 7 b, an upper wire guide 8 a, a lower wire guide 8 b, a power source 11, and a wire electrode 12.
- an upper wire guide 8a is disposed on the upper side of a position where the workpiece (work) 14 is processed, and a lower wire guide 8b is disposed on the lower side.
- the upper wire guide 8a and the lower wire guide 8b are arranged so as to sandwich the workpiece (workpiece) 14 between the upper and lower sides.
- the upper wire guide 8a supports the wire electrode 12 from the upper side and sends the wire electrode 12 to the lower side.
- the lower wire guide 8b supports the wire electrode 12 from below and winds up the wire electrode 12.
- the wire electrode 12 is extended between the upper wire guide 8a and the lower wire guide 8b. Then, the wire electrode 12 is fed in a certain direction from the upper wire guide 8a toward the lower wire guide 8b.
- the power supply 11 is connected to the wire electrode 12 and the workpiece 14.
- a pulse voltage is applied between the wire electrode 12 and the workpiece 14 by the power supply 11, and the workpiece 14 is machined into a sawtooth shape by a discharge generated by the application of this voltage.
- the working fluid 13 is supplied along the wire electrode 12 from each nozzle (nozzles 30a and 30b described later) installed in the upper wire guide 8a and the lower wire guide 8b.
- the machining liquid 13 maintains, for example, an insulating state between the wire electrode 12 and the workpiece 14, discharges a removed workpiece generated by machining the workpiece 14, and removes the workpiece 14 and Supplied to cool the wire electrode 12.
- the driving unit 7a drives the upper wire guide 8a
- the driving unit 7b drives the lower wire guide 8b.
- the drive unit 7 a moves the position of the upper wire guide 8 a in a plane perpendicular to the wire electrode 12.
- the drive unit 7b moves the position of the lower wire guide 8b within a plane perpendicular to the wire electrode 12, for example.
- the drive units 7 a and 7 b and the power source 11 are controlled by the control device 10.
- the machining shape is input to the command generator 9 of the control device 10 from an external device (not shown).
- the command generation unit 9 generates commands for the drive control units 6 a and 6 b and the power supply control unit 15 based on the input machining shape.
- the machining shape input to the command generation unit 9 is a shape of a portion where machining is performed on the workpiece 14.
- the processed shape may be a post-processing shape of the workpiece 14 formed by processing the workpiece 14.
- the command (upper drive command) generated by the command generation unit 9 for the drive control unit 6a is a command for the drive control unit 6a to control the drive unit 7a, and the drive unit 7a drives the upper wire guide 8a. It is a command for.
- the command (lower drive command) generated by the command generation unit 9 for the drive control unit 6b is a command for the drive control unit 6b to control the drive unit 7b, and the drive unit 7b uses the lower wire guide 8b. This is a command for driving.
- the command (power command) generated by the command generating unit 9 for the power control unit 15 is a command for the power control unit 15 to control the power source 11, and the power source 11 includes the wire electrode 12 and the workpiece 14. Is a command for controlling the voltage applied between the two.
- the drive control unit 6a controls the drive unit 7a based on the upper drive command.
- the drive control unit 6b controls the drive unit 7b based on the lower drive command.
- the power supply control unit 15 controls the power supply 11 based on the power supply command.
- the drive control units 6a and 6b control the drive units 7a and 7b, so that the drive units 7a and 7b drive the upper wire guide 8a and the lower wire guide 8b.
- the relative positions of the upper wire guide 8a and the lower wire guide 8b with respect to the workpiece 14 are controlled in accordance with the upper drive command and the lower drive command corresponding to the machining shape.
- the workpiece 14 is cut into a shape corresponding to the machining shape.
- the power supply control unit 15 controls the power supply 11 so that the discharge phenomenon between the wire electrode 12 and the workpiece 14 is maintained in an appropriate state according to the power supply command.
- the upper wire guide 8a and the lower wire guide 8b may be referred to as a wire guide 8.
- FIG. 2 is a diagram for explaining the position of the wire electrode that varies depending on the processing conditions.
- FIG. 2 shows a cross-sectional view of the wire guide 8. Wire tension is applied between the pair of upper and lower upper wire guides 8a and 8b in order to keep the wire electrode 12 straight.
- the elastic deformation amount of the wire guide 8 becomes large.
- the upper wire guide 8a and the lower wire guide 8b when elastically deformed (when the wire tension is large) are respectively shown by solid lines.
- the elastic deformation amount of the wire guide 8 is small.
- the upper wire guide 8a and the lower wire guide 8b when not elastically deformed are respectively shown by broken lines.
- the wire electrode 12 when the wire guide 8 is elastically deformed is indicated by a solid line, and the wire electrode 12 when the wire guide 8 is not elastically deformed is indicated by a broken line.
- the wire electrode 12 Since the wire electrode 12 is supported by the wire guide 8, when the amount of elastic deformation of the wire guide 8 changes, the wire electrode 12 is pulled to a position corresponding to the amount of elastic deformation. Thus, when the wire tension changes, the cutting position of the workpiece 14 by the wire electrode 12 changes according to the magnitude of the wire tension, and an error occurs in the processing position.
- FIG. 3 is a schematic diagram for explaining the influence of the wire position displacement during the rough machining on the finishing machining.
- FIG. 3 shows a top view of the workpiece 14 (cross-sectional view of the wire electrode 12).
- the workpiece 14 is roughly machined along a rough machining line 31 indicated by a solid line, and is then taken along a finishing machining line 32 indicated by a broken line.
- the workpiece 14 is finished.
- the inner region 41 is removed from the workpiece 14 and a substantially annular outer region 42 is left.
- the illustration of the approach line up to the inner region 41 of the workpiece 14 is omitted.
- the wire tension is set low during rough machining, and the wire tension is set high during finishing. Therefore, there is a difference in the amount of elastic deformation of the wire guide 8 between the roughing process and the finishing process, and as a result, a difference occurs in the position of the wire electrode 12 on the workpiece 14.
- the workpiece 14 is machined along a locus along the rough machining line 31.
- the amount of elastic deformation of the wire guide 8 differs during finishing using the finishing conditions as compared to rough machining.
- the wire electrode 12 processes the workpiece 14 along a locus along the finishing line 32 that is displaced from the roughing line 31.
- the removal amount 21 of the workpiece 14 is increased, and when finishing is performed at the position shown on the right side of the paper surface. Reduces the removal amount 22 of the workpiece 14.
- the workpiece 14 is processed so that the rough processing line 31 becomes the same as the finishing processing line 32 by correcting the position of the wire electrode 12 when performing rough processing.
- the position of the wire electrode 12 is made to correspond with the time of rough processing and the time of finishing with respect to the same position command.
- the correction amount storage unit 3 is a memory that stores a wire position correction amount.
- the correction amount storage unit 3 stores a wire position correction amount for each processing condition in advance.
- the machining condition setting unit 2 sets the externally inputted machining conditions in the control device 10.
- the processing conditions set by the processing condition setting unit 2 include, for example, wire tension.
- the processing conditions may be a type of processing such as rough processing or finishing processing.
- the processing condition setting unit 2 registers the correspondence between the type of processing and the processing conditions in advance. Then, the machining condition setting unit 2 extracts a machining condition corresponding to the type of machining based on the registered correspondence, and sets it in the control device 10.
- the correction amount reading unit 4 reads the processing conditions from the processing condition setting unit 2 and reads the wire position correction amount corresponding to the processing conditions from the correction amount storage unit 3 when processing the workpiece 14.
- the correction amount reading unit 4 sends the read wire position correction amount to the wire position correction unit 5.
- the wire position correction unit 5 corrects the control position controlled by the drive control units 6a and 6b according to the wire position correction amount. In other words, the wire position correction unit 5 corrects the control instruction (control position) output from the drive control units 6a and 6b to the drive units 7a and 7b with the wire position correction amount. Accordingly, the drive units 7a and 7b correct the position of the wire guide 8 to the control position corrected with the wire position correction amount.
- the correction amount storage unit 3 stores the wire position correction amount associated with the machining conditions. Further, the machining condition setting unit 2 sets machining conditions inputted externally in the control device 10. In addition, the machining shape is input to the command generation unit 9. The command generation unit 9 generates commands for the drive control units 6 a and 6 b and the power supply control unit 15 based on the input machining shape.
- the power supply control unit 15 controls the power supply 11 based on the power supply command.
- the drive control unit 6a controls the drive unit 7a based on the upper drive command, and the drive control unit 6b controls the drive unit 7b based on the lower drive command.
- the correction amount reading unit 4 reads the processing conditions from the processing condition setting unit 2 and reads the wire position correction amount corresponding to the processing conditions from the correction amount storage unit 3. Then, the correction amount reading unit 4 sends the read wire position correction amount to the wire position correction unit 5.
- the wire position correction unit 5 corrects the control position controlled by the drive control units 6a and 6b according to the wire position correction amount. Accordingly, the drive units 7a and 7b correct the position of the wire guide 8 to the control position corrected with the wire position correction amount. As a result, the position of the wire electrode 12 is corrected to a position according to the processing conditions.
- the case where the upper wire guide 8a and the lower wire guide 8b are driven has been described. However, if at least two of the upper wire guide 8a, the lower wire guide 8b, and the workpiece 14 are driven, they are driven. Good. For example, by controlling the relative position between the workpiece 14 and the wire electrode 12 and the inclination of the wire electrode 12, the same effect as in the case of controlling the positions of the upper wire guide 8a and the lower wire guide 8b can be obtained. .
- the position of the wire electrode 12 may be corrected by correcting at least one of the finishing line 32 and the roughing line 31.
- the position of the wire electrode 12 may be corrected so that the finishing line 32 is the same as the roughing line 31.
- the pair of wire guides 8 may be arranged in any direction.
- a pair of wire guides 8 may be arranged in the horizontal direction.
- one wire guide is arranged on the right side and the other wire guide is arranged on the left side.
- one wire guide is disposed at the first position, and the other wire guide is disposed at the second position facing each other with the workpiece 14 interposed therebetween.
- the wire position is corrected in accordance with the processing conditions such as the wire tension. Therefore, the distance between the wire electrode 12 and the workpiece 14 that changes depending on the processing conditions.
- the relative position can be corrected.
- Embodiment 2 a second embodiment of the present invention will be described with reference to FIG.
- the wire tension is considered as a processing condition.
- the position of the wire electrode 12 is corrected in consideration of the reaction force (processing fluid pressure) of the processing fluid 13.
- FIG. 4 is a diagram for explaining elastic deformation of the wire guide due to wire tension and working fluid pressure.
- FIG. 4 the positions of the wire guide 8 and the wire electrode 12 that change depending on the wire tension and the working fluid pressure (working fluid pressure) are shown in cross-sectional views.
- the downward wire tension by the wire electrode 12 and the upward processing reaction force (processing fluid pressure) by the processing fluid 13 act on the upper wire guide 8a.
- the upper wire guide 8a shown in FIG. 4 shows an example in which the influence of the wire tension is larger than the influence of the working fluid reaction force, and the upper wire guide 8a is elastically deformed downward.
- the lower wire guide 8b shown in FIG. 4 shows an example in which the influence of the working fluid reaction force is larger than the influence of the wire tension, and the lower wire guide 8b is elastically deformed downward.
- the wire tension When the wire tension is large, the amount of elastic deformation toward the workpiece 14 is large, and when the machining fluid reaction force is large, the amount of elastic deformation toward the opposite side of the workpiece 14 is large.
- the upper wire guide 8a and the lower wire guide 8b when elastically deformed are respectively shown by solid lines. Further, the upper wire guide 8a and the lower wire guide 8b when not elastically deformed are respectively shown by broken lines. Further, the wire electrode 12 when the wire guide 8 is elastically deformed is indicated by a solid line, and the wire electrode 12 when the wire guide 8 is not elastically deformed is indicated by a broken line.
- the correction amount storage unit 3 of the present embodiment stores a wire position correction amount (correspondence between processing conditions and wire position correction amount) set in advance for each combination of wire tension and machining fluid pressure. At this time, the correction amount storage unit 3 calculates the wire position correction amount for correcting the relative position between the upper wire guide 8a and the workpiece 14, and the relative position between the lower wire guide 8b and the workpiece 14. The wire position correction amount to be corrected is stored for each processing condition. The wire position correction amount for the upper wire guide 8a and the wire position correction amount for the lower wire guide 8b may be the same value.
- the machining condition setting unit 2 of the present embodiment sets the wire tension and the machining fluid pressure in the control device 10 as machining conditions input from the outside.
- the correction amount reading unit 4 of the present embodiment reads out the processing conditions (wire tension and processing fluid pressure) from the processing condition setting unit 2 when processing the workpiece 14, and responds to the processing conditions.
- the wire position correction amount to be read is read from the correction amount storage unit 3.
- the correction amount storage unit 3 stores a wire position correction amount associated with a processing condition (a combination of wire tension and processing fluid pressure). Since the processing fluid pressure may differ between the upper wire guide 8a side and the lower wire guide 8b side, the processing conditions for the upper wire guide 8a side, the processing conditions for the lower wire guide 8b side, Is stored in the correction amount storage unit 3.
- a processing condition a combination of wire tension and processing fluid pressure
- the processing condition setting unit 2 sets the wire tension and the processing fluid pressure in the control device 10 as processing conditions.
- the machining shape is input to the command generation unit 9.
- the command generation unit 9 generates commands for the drive control units 6 a and 6 b and the power supply control unit 15 based on the input machining shape.
- the power supply control unit 15 controls the power supply 11 based on the power supply command.
- the drive control unit 6a controls the drive unit 7a based on the upper drive command, and the drive control unit 6b controls the drive unit 7b based on the lower drive command.
- the correction amount reading unit 4 reads the processing condition from the processing condition setting unit 2 and reads the wire position correction amount corresponding to the processing condition from the correction amount storage unit 3. Specifically, the correction amount reading unit 4 corrects the relative position between the upper wire guide 8a and the workpiece 14 corresponding to the processing conditions (combination of wire tension and processing fluid pressure). Correction amounts (for example, wire position correction amounts ⁇ X1, ⁇ Y1) are read from the correction amount storage unit 3.
- the correction amount reading unit 4 calculates wire position correction amounts (for example, wire position correction amounts ⁇ X2, ⁇ Y2) for correcting the relative position between the lower wire guide 8b and the workpiece 14 corresponding to the processing conditions. Read from the correction amount storage unit 3.
- wire position correction amounts for example, wire position correction amounts ⁇ X2, ⁇ Y2
- the correction amount reading unit 4 sends the read wire position correction amounts to the wire position correction unit 5.
- the wire position correction unit 5 corrects the control amount of the drive control unit 6a according to the wire position correction amounts ⁇ X1 and ⁇ Y1. Thereby, the relative position of the upper wire guide 8a and the workpiece 14 is corrected via the drive part 7a.
- the wire position correction unit 5 corrects the control amount of the drive control unit 6b according to the wire position correction amounts ⁇ X2 and ⁇ Y2. Thereby, the relative position of the lower wire guide 8b and the workpiece 14 is corrected via the drive unit 7b.
- the wire electric discharge machining apparatus 1a corrects the relative position between the upper wire guide 8a and the workpiece 14 using the machining conditions for the upper wire guide 8a. Further, the wire electric discharge machining apparatus 1a corrects the relative position between the lower wire guide 8b and the workpiece 14 using the machining conditions for the lower wire guide 8b.
- the machining conditions include the wire tension and the machining fluid pressure
- the wire electrode 12 and the workpiece 14 that change depending on both the wire tension and the machining fluid pressure
- the relative position between can be corrected. Accordingly, it is possible to obtain a highly accurate contour processing shape that is not affected by the processing conditions.
- Embodiment 3 of the present invention will be described with reference to FIG.
- the wire tension and the machining fluid pressure are considered as the machining conditions.
- the distance between the nozzle (working fluid nozzle) of the wire guide 8 and the workpiece 14 is further considered.
- the position of the wire electrode 12 is corrected.
- FIG. 5 is a diagram for explaining the influence of the working fluid reaction force when the distance between the nozzle of the wire guide and the workpiece is longer than a predetermined value.
- a nozzle (first nozzle) 30a for delivering the processing liquid 13 is disposed at the tip of the upper wire guide 8a (on the workpiece 14 side).
- a nozzle (second nozzle) 30b for delivering the processing liquid 13 is disposed at the tip end (workpiece 14 side) of the lower wire guide 8b.
- the lower side distance Db the distance between the nozzle 30b and the workpiece 14 in FIG. 5
- the lower wire guide 8b of FIG. 4 the lower wire guide 8b of FIG.
- the elastic deformation amount of the lower wire guide 8b varies depending on the lower side distance Db.
- the upper wire guide 8a depends on the distance between the nozzle 30a of the upper wire guide 8a and the workpiece 14 (hereinafter referred to as the upper side distance Da).
- the position correction of the wire electrode 12 is performed by adding the lower side distance Db and the upper side distance Da to the processing conditions.
- the correction amount storage unit 3 corrects the relative position between the upper wire guide 8a and the workpiece 14, and corrects the relative position between the lower wire guide 8b and the workpiece 14.
- the position correction amount is stored for each processing condition. Specifically, the correction amount storage unit 3 stores a wire position correction amount (correspondence between processing conditions and wire position correction amount) set in advance for each combination of wire tension, machining fluid pressure, and lower side distance Db. Keep it. Further, the correction amount storage unit 3 stores a wire position correction amount (correspondence between processing conditions and wire position correction amount) set in advance for each combination of wire tension, machining fluid pressure, and upper side distance Da. .
- the machining condition setting unit 2 of the present embodiment sets the wire tension, the machining fluid pressure, the upper side distance Da, and the lower side distance Db in the control device 10 as the externally input machining conditions.
- the correction amount reading unit 4 reads the processing conditions from the processing condition setting unit 2 and reads the wire position correction amount corresponding to the processing conditions from the correction amount storage unit 3 when processing the workpiece 14. .
- the correction amount storage unit 3 stores the wire position correction amount associated with the machining conditions.
- the wire position correction amounts stored in the correction amount storage unit 3 are the wire position correction amount for the nozzle 30a and the wire position correction amount for the nozzle 30b.
- the wire position correction amount for the nozzle 30a is associated with a set of wire tension, working fluid pressure, and upper side distance Da.
- the wire position correction amount for the nozzle 30b is associated with a set of wire tension, working fluid pressure, and lower side distance Db.
- the processing condition setting unit 2 sets the wire tension, the processing fluid pressure, the upper side distance Da, and the lower side distance Db in the control device 10 as processing conditions.
- the machining shape is input to the command generation unit 9.
- the command generation unit 9 generates commands for the drive control units 6 a and 6 b and the power supply control unit 15 based on the input machining shape.
- the power supply control unit 15 controls the power supply 11 based on the power supply command.
- the drive control unit 6a controls the drive unit 7a based on the upper drive command, and the drive control unit 6b controls the drive unit 7b based on the lower drive command.
- the correction amount reading unit 4 reads the processing condition from the processing condition setting unit 2 and reads the wire position correction amount corresponding to the processing condition from the correction amount storage unit 3.
- the correction amount reading unit 4 is configured so that the relative position between the lower wire guide 8b and the workpiece 14 corresponding to the processing conditions (a combination of the wire tension, the processing fluid pressure, and the lower side distance Db). Is read from the correction amount storage unit 3.
- the correction amount reading unit 4 corrects the relative position between the upper wire guide 8a and the workpiece 14 corresponding to the processing conditions (combination of wire tension, processing fluid pressure, and upper side distance Da).
- the wire position correction amount to be read is read from the correction amount storage unit 3.
- the correction amount reading unit 4 sends the read wire position correction amounts to the wire position correction unit 5.
- the wire position correction unit 5 corrects the control amount of the drive control unit 6b according to the wire position correction amount. Thereby, the relative position of the lower wire guide 8b and the workpiece 14 is corrected via the drive unit 7b.
- the wire position correction unit 5 corrects the control amount of the drive control unit 6a according to the wire position correction amount. Thereby, the relative position of the upper wire guide 8a and the workpiece 14 is corrected via the drive part 7a.
- the processing conditions include the wire tension, the processing liquid pressure, the upper side distance Da, and the lower side distance Db
- the wire tension, the processing liquid pressure, the upper side distance Da, and the lower part The relative position between the wire electrode 12 and the workpiece 14 that changes depending on the side distance Db can be corrected. Accordingly, it is possible to obtain a highly accurate contour processing shape that is not affected by the processing conditions.
- Embodiment 4 FIG. Next, a fourth embodiment of the present invention will be described with reference to FIG.
- the wire tension, the working fluid pressure, the upper side distance Da, and the lower side distance Db are considered as processing conditions.
- the wire electrode 12 itself is further considered in terms of deformation. 12 position correction is performed.
- FIG. 6 is a diagram for explaining a processing error caused by deformation of the wire electrode.
- the wire guide 8 being elastically deformed by the wire tension and the working fluid reaction force, the wire electrode 12 is deformed depending on the processing conditions. For this reason, the relative position between the wire electrode 12 and the workpiece 14 changes.
- the wire electrode 12 is more likely to be deformed as the rigidity that changes depending on the wire material is lower. Further, the wire electrode 12 is more easily deformed as the diameter is smaller. Furthermore, the longer the distance between the wire guide 8a and the wire guide 8b, the easier the deformation.
- the wire electric discharge machining apparatus 1a performs position correction of the wire electrode 12 in consideration of the deformation of the wire electrode 12.
- the correction amount storage unit 3 includes a wire tension, a working fluid pressure, an upper wire guide 8a or a lower side distance Db, a rigidity of the wire electrode 12 (wire rigidity), and a diameter of the wire electrode 12 ( The wire position correction amount set for each combination of the (wire diameter) and the inter-guide distance Dc is stored.
- the machining condition setting unit 2 of the present embodiment includes, as externally inputted machining conditions, wire tension, machining fluid pressure, upper side distance Da, lower side distance Db, rigidity of the wire electrode 12, and diameter of the wire electrode 12.
- the guide distance Dc is set in the control device 10.
- the correction amount reading unit 4 reads the processing conditions from the processing condition setting unit 2 and reads the wire position correction amount corresponding to the processing conditions from the correction amount storage unit 3 when processing the workpiece 14. .
- the correction amount storage unit 3 stores the wire position correction amount associated with the processing conditions.
- the wire position correction amount for the nozzle 30a is associated with a set of wire tension, machining fluid pressure, upper side distance Da, rigidity of the wire electrode 12, diameter of the wire electrode 12, and distance Dc between the guides. ing.
- the processing condition setting unit 2 sets the wire tension, the processing fluid pressure, the upper side distance Da, the rigidity of the wire electrode 12, the diameter of the wire electrode 12, and the distance Dc between the guides in the control device 10 as processing conditions.
- the correction amount reading unit 4 reads the processing condition from the processing condition setting unit 2, and corrects the wire position corresponding to the processing condition.
- the amount is read from the correction amount storage unit 3.
- the correction amount reading unit 4 determines whether the machining conditions (wire tension, machining fluid pressure, upper side distance Da, rigidity of the wire electrode 12, the diameter of the wire electrode 12, and the distance between the guides are combined.
- the wire position correction amount for correcting the relative position between the upper wire guide 8a and the work piece 14 corresponding to () is read out from the correction amount storage unit 3.
- the wire position correction unit 5 corrects the control amount of the drive control unit 6b according to the wire position correction amount. Thereby, the relative position of the upper wire guide 8a and the workpiece 14 is corrected via the drive part 7a.
- the processing condition setting unit 2 may set the material of the wire electrode 12 instead of the rigidity of the wire electrode 12.
- the correction amount storage unit 3 stores the rigidity (such as an elastic coefficient) of the wire electrode 12 in association with the material of the wire electrode 12.
- the correction amount reading unit 4 extracts the rigidity of the wire electrode 12 based on the association in the correction amount storage unit 3. Even in this case, the same effect as when the rigidity of the wire electrode 12 is set in the processing condition setting unit 2 can be obtained.
- the shape, rigidity, and material of the wire guide 8 and the shapes, rigidity, and material of the nozzles 30a and 30b may be added. In this case, it is possible to further improve the processing contour accuracy by correcting the position of the wire electrode 12 in consideration of the deformation of the wire guide 8 or the deformation of the nozzles 30a and 30b.
- the processing conditions are wire tension, processing fluid pressure, upper side distance Da and lower side distance Db, rigidity of wire electrode 12, diameter of wire electrode 12, and inter-guide distance Dc. Therefore, the wire electrode 12 varies depending on the wire tension, the working fluid pressure, the upper side distance Da, the lower side distance Db, the rigidity of the wire electrode 12, the diameter of the wire electrode 12, and the distance Dc between the guides. And the relative position between the workpiece 14 can be corrected. Accordingly, it is possible to obtain a highly accurate contour processing shape that is not affected by the processing conditions.
- Embodiment 5 a fifth embodiment of the present invention will be described with reference to FIG.
- the wire tension, the working fluid pressure, the upper side distance Da, the lower side distance Db, the rigidity of the wire electrode 12, the diameter of the wire electrode 12, and the guide distance Dc are considered as the processing conditions.
- the position of the wire electrode 12 is corrected in consideration of the amount of elastic deformation of the workpiece 14 caused by the machining fluid pressure.
- FIG. 7 is a diagram for explaining the elastic deformation of the workpiece caused by the machining fluid reaction force.
- the workpiece 14 is elastically deformed by the machining fluid reaction force. For this reason, the relative position between the wire electrode 12 and the workpiece 14 changes.
- the wire electric discharge machining apparatus 1a performs position correction of the wire electrode 12 in consideration of the shape and rigidity of the workpiece 14.
- the correction amount storage unit 3 of the present embodiment preliminarily includes wire tension, machining fluid pressure, upper wire guide 8a or lower side distance Db, rigidity of the wire electrode 12, diameter of the wire electrode 12, and distance between guides.
- the wire position correction amount set for each combination of Dc and the shape / rigidity information (shape and rigidity) of the workpiece 14 is stored.
- the machining condition setting unit 2 of the present embodiment includes, as externally inputted machining conditions, wire tension, machining fluid pressure, upper side distance Da, lower side distance Db, rigidity of the wire electrode 12, and diameter of the wire electrode 12.
- the guide distance Dc and the shape / rigidity information are set in the control device 10.
- the correction amount reading unit 4 reads the processing conditions from the processing condition setting unit 2 and reads the wire position correction amount corresponding to the processing conditions from the correction amount storage unit 3 when processing the workpiece 14. .
- the correction amount storage unit 3 stores the wire position correction amount associated with the processing conditions.
- the wire position correction amount for the nozzle 30a includes the wire tension, the working fluid pressure, the upper side distance Da, the rigidity of the wire electrode 12, the diameter of the wire electrode 12, the distance Dc between the guides, and the shape / rigidity information. Are associated with each other.
- the machining condition setting unit 2 uses the wire tension, the machining fluid pressure, the upper side distance Da, the rigidity of the wire electrode 12, the diameter of the wire electrode 12, the distance between guides Dc and the shape / rigidity information as the machining conditions. Set.
- the correction amount reading unit 4 reads the processing condition from the processing condition setting unit 2, and corrects the wire position corresponding to the processing condition. The amount is read from the correction amount storage unit 3.
- the correction amount reading unit 4 is configured to process the processing conditions (wire tension, processing fluid pressure, upper side distance Da, rigidity of the wire electrode 12, diameter of the wire electrode 12, and distance between guides Dc, The wire position correction amount for correcting the relative position between the upper wire guide 8a and the workpiece 14 corresponding to the combination of the shape / rigidity information) is read from the correction amount storage unit 3.
- the wire position correction unit 5 corrects the control amount of the drive control unit 6b according to the wire position correction amount. Thereby, the relative position of the upper wire guide 8a and the workpiece 14 is corrected via the drive part 7a.
- the processing condition setting unit 2 may set the material of the workpiece 14 instead of the rigidity of the workpiece 14.
- the shape and material of the workpiece 14 may be set in the shape / rigidity information.
- the correction amount storage unit 3 stores the rigidity (elastic coefficient and the like) of the workpiece 14 in association with the material of the workpiece 14.
- the correction amount reading unit 4 extracts the rigidity of the workpiece 14 based on the association in the correction amount storage unit 3 and the material in the shape / rigidity information. Even in this case, the same effect as when the shape and rigidity of the workpiece 14 are set in the shape / rigidity information can be obtained.
- the wire electric discharge machining apparatus 1a may use a plurality of shape / rigidity information corresponding to the machining progress. Further, the size and weight of the workpiece 14 may be added to the shape / rigidity information.
- the processing conditions are wire tension, processing fluid pressure, upper side distance Da and lower side distance Db, rigidity of wire electrode 12, diameter of wire electrode 12, distance between guides Dc, shape Since it includes the rigidity information, the wire tension, the working fluid pressure, the upper side distance Da, the lower side distance Db, the rigidity of the wire electrode 12, the diameter of the wire electrode 12, and the wire that changes depending on the shape / rigidity information
- the relative position between the electrode 12 and the workpiece 14 can be corrected. Accordingly, it is possible to obtain a highly accurate contour processing shape that is not affected by the processing conditions.
- the wire position correction amount to be stored in the correction amount storage unit 3 is determined from the processing shape measurement result (the shape after processing) of the workpiece 14 processed under various processing conditions.
- FIG. 8A is a diagram illustrating an example of a machining shape measurement result of a workpiece.
- FIG. 8A shows a top view of the workpiece 14 after processing.
- the X-axis direction is the same direction as the reference plane 50
- the Y-axis direction is a direction perpendicular to the reference plane 50.
- FIG. 8B is a diagram illustrating an example of the wire position correction amount for each processing condition.
- the wire electric discharge machine 1a processes the workpiece 14 under various processing conditions.
- the reference surface 50 is processed under the processing conditions that allow the most accurate processing, and is used as a reference for comparison with other processing conditions.
- the shape of the workpiece 14 is measured to grasp the machining contour error depending on the machining conditions.
- the shape of the workpiece 14 is shown when machining is performed using the reference surface 50 and machining conditions (1) to (4).
- the machining shape measurement result of the workpiece 14 is stored in the correction amount storage unit 3.
- the wire position correction amount 51 in the Y-axis direction under the processing condition (1) is +2 ⁇ m.
- the correction amount storage unit 3 stores +2 ⁇ m as the wire position correction amount 51 in the Y-axis direction.
- the correction amount storage unit 3 comprehensively stores, for example, the wire position correction amount of the processing conditions actually used. If the number of combinations of machining conditions is too large, the wire position correction amount may be derived by interpolating between the machining conditions. Thus, appropriate wire position correction can be realized with a small number of measurement points and a small number of processing condition setting points.
- the correction amount storage unit 3 stores the wire position correction amount shown in FIG. 8B
- the actual measurement point is a point (machining condition) in which the workpiece position 14 is actually machined using the machining conditions, and the wire position correction amount is set by measuring the machining shape.
- the interpolation point is a point (processing condition) in which the wire position correction amount is set by the interpolation process using the wire position correction amount acquired at the actual measurement point.
- FIG. 9 is a diagram for explaining the interpolation points of the machining conditions when the practical maximum and minimum values of the machining conditions are used as the actual measurement points of the wire position correction amount.
- the machining conditions are a combination of wire tension and machining fluid pressure
- the X axis is wire tension
- the Y axis is machining fluid pressure.
- the actual measurement points when the workpiece 14 is machined under the machining conditions mainly including the practical maximum and minimum values of the wire tension and the practical maximum and minimum values of the working fluid pressure.
- 61 (black circle) and interpolation point 62 (white circle) are shown.
- the machining result is actually measured under the machining conditions of the actual measurement point 61, and the machining conditions of the interpolation point 62 is supplemented by interpolation such as linear interpolation. Since the cause of the position displacement of the wire electrode 12 is elastic deformation of the wire guide 8 due to at least one of the wire tension and the working fluid reaction force, it is considered that the amount of position displacement of the wire electrode 12 is linear.
- the set value of the machining fluid pressure is adjusted by taking into account the distance between the nozzles 30a, 30b and the workpiece 14 (upper side distance Da, lower side distance Db). .
- the set value of the machining fluid pressure is adjusted by creating a reference table or creating an approximate expression based on the actual measurement result of the machining fluid pressure.
- FIG. 10 is a diagram for explaining the interpolation point of the machining condition when the practical center value of the machining condition is used as the actual measurement point of the wire position correction amount.
- the machining conditions are a combination of wire tension and machining fluid pressure
- the X axis is wire tension
- the Y axis is machining fluid pressure.
- the measured point 61 black circle
- 62 (white circle) is shown.
- the wire position correction amount to be stored in the correction amount storage unit 3 is determined from the processing shape measurement result of the workpiece 14 processed under various processing conditions. Wire position correction can be easily realized.
- the desired wire position correction amount can be easily derived with a small number of measurements.
- Embodiment 7 FIG. Next, a seventh embodiment of the present invention will be described with reference to FIG.
- the position of the wire guide 8 being processed is measured in advance. Based on the measurement result, the wire position correction amount stored in the correction amount storage unit 3 is set.
- FIG. 11 is a diagram for explaining a method of measuring the amount of displacement of the wire guide.
- position measuring devices 16a and 16b for measuring the position (displacement amount) of the wire guide 8 are installed in the wire electric discharge machining apparatus 1a.
- the position measuring devices 16a and 16b measure the position of the wire guide 8 being processed.
- the position measuring device 16a measures the position of the upper wire guide 8a being processed
- the position measuring device 16b measures the position of the lower wire guide 8b being processed.
- the position measuring devices 16a and 16b measure the relative distance between the workpiece 14 and the wire guide 8, for example. Therefore, the position measuring devices 16a and 16b are arranged at a position where the relative distance between the workpiece 14 and the wire guide 8 can be measured, for example.
- the position measuring devices 16a and 16b may be fixed to a frame (not shown) of the wire electric discharge machining apparatus 1a. In this case, the position measuring devices 16a and 16b measure the distance between the wire guide 8 and the gantry of the wire electric discharge machining apparatus 1a.
- the wire position correction amount is set based on the measured position.
- the displacement amount of the wire guide 8 being processed is measured under various processing conditions, and the wire position correction amount to be stored in the correction amount storage unit 3 is determined from the displacement amount measurement result. Therefore, highly accurate wire position correction can be realized.
- Embodiment 8 FIG. Next, an eighth embodiment of the present invention will be described with reference to FIG.
- the wire position correction amount is derived by the method described in the sixth embodiment
- the position of the wire guide 8 being processed and the displacement amount of the workpiece 14 are measured.
- the wire position correction amount stored in the correction amount storage unit 3 is set.
- FIG. 12 is a diagram for explaining a method of measuring the displacement amount of the wire guide and the displacement amount of the workpiece.
- the position measuring device 16c is a device that measures the position (displacement amount) of the workpiece 14 with respect to the gantry of the wire electric discharge machining apparatus 1a.
- the wire position correction amount is set based on the measured displacement amount of the workpiece 14. Thereby, the relative position between the wire electrode 12 and the workpiece 14 can be corrected with high accuracy.
- the procedure for creating the wire position correction amount to be stored in the correction amount storage unit 3 from the processing shape measurement result of the workpiece 14 is the same as that in the sixth embodiment, and thus the description thereof is omitted.
- the amount of displacement of the workpiece 14 being processed under various processing conditions is measured, and the wire position correction amount stored in the correction amount storage unit 3 from the displacement amount measurement result. Therefore, highly accurate wire position correction can be realized.
- Embodiment 9 FIG. Next, a ninth embodiment of the present invention will be described with reference to FIG.
- the case where the wire position correction amount is stored using a numerical table (table format) as shown in FIG. 8B has been described, but in this embodiment, the correction amount storage unit 3 Instead, the wire position correction amount is generated by the correction amount determination unit 17 using the function shown in the following equation (1).
- the configuration of the wire electric discharge machining apparatus 1b in FIG. 13 is the same as that in FIG. To do.
- a coefficient is input to the correction amount determination unit 17.
- Equation (1) shows only the correction value in the Y-axis direction, but the same applies to the X-axis direction.
- the formula (1) is specifically represented by the following formula (2).
- ⁇ Y g (T, P, L) (3)
- equation (3) can be approximated by equation (4) below.
- ⁇ Y (a ⁇ T) + (d ⁇ P / L 2 ) + e (4)
- d and e are coefficients, which are identified from the measurement result of the machining shape.
- the correction amount determining unit 17 corrects the wire position from the processing shape measurement result of the workpiece 14 processed under various processing conditions or the position of the wire electrode 13 being processed. Since the amount is determined, the wire position correction amount under the non-measured processing condition can be determined easily and with high accuracy from the wire position correction amount under the measured processing condition. Therefore, it is possible to determine the wire position correction amount with the required accuracy with a small number of measurements. In addition, there is an effect that the amount of memory required for the control device of the electric discharge machining apparatus can be saved.
- the wire electric discharge machining apparatus and the control apparatus according to the present invention are suitable for wire electric discharge machining performed while correcting the position displacement of the wire electrode.
- 1a, 1b wire electric discharge machining device 2 machining condition setting unit, 3 correction amount storage unit, 4 correction amount reading unit, 5 wire position correction unit, 6a, 6b drive control unit, 7a, 7b drive unit, 8a upper wire guide, 8b Lower wire guide, 9 Command generation unit, 10 Control device, 11 Power supply, 12 Wire electrode, 13 Work fluid, 14 Workpiece, 15 Power supply control unit, 16a to 16c Position measuring instrument, 17 Correction amount determination unit, 20 Processing Part, 30a, 30b nozzle, 61 actual measurement points, 62 interpolation points.
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Abstract
Description
図1は、実施の形態1に係るワイヤ放電加工装置の構成を示す図である。ワイヤ放電加工装置1aは、ワイヤ電極12と被加工物14との間に電圧を印加することによって被加工物14を放電加工する装置である。本実施の形態のワイヤ放電加工装置1aは、ワイヤ張力に依存するワイヤガイド(上部ワイヤガイド8a、下部ワイヤガイド8b)の弾性変形に起因するワイヤ電極12の位置変位を考慮して、被加工物14とワイヤ電極12との間の相対位置を補正する。
つぎに、図4を用いてこの発明の実施の形態2について説明する。実施の形態1では、加工条件としてワイヤ張力を考慮したが、実施の形態2では、加工液13の反力(加工液圧力)をさらに考慮して、ワイヤ電極12の位置補正を行う。
つぎに、図5を用いてこの発明の実施の形態3について説明する。実施の形態2では、加工条件としてワイヤ張力および加工液圧力を考慮したが、実施の形態3では、ワイヤガイド8のノズル(加工液ノズル)と被加工物14との間の距離をさらに考慮して、ワイヤ電極12の位置補正を行う。
つぎに、図6を用いてこの発明の実施の形態4について説明する。実施の形態3では、加工条件としてワイヤ張力、加工液圧力、上部側距離Daおよび下部側距離Dbを考慮したが、実施の形態4では、ワイヤ電極12自身の変形をさらに考慮して、ワイヤ電極12の位置補正を行う。
つぎに、図7を用いてこの発明の実施の形態5について説明する。実施の形態4では、加工条件としてワイヤ張力、加工液圧力、上部側距離Da、下部側距離Db、ワイヤ電極12の剛性、ワイヤ電極12の径、および、ガイド間距離Dcを考慮したが、実施の形態5では、加工液圧力に起因する被加工物14の弾性変形量をさらに考慮して、ワイヤ電極12の位置補正を行う。
つぎに、図8-1~図10を用いてこの発明の実施の形態6について説明する。実施の形態6では、種々の加工条件で加工した被加工物14の加工形状計測結果(加工後の形状)から、補正量記憶部3に記憶させるワイヤ位置補正量を決定する。
つぎに、図11を用いてこの発明の実施の形態7について説明する。実施の形態7では、実施の形態6で説明した方法によってワイヤ位置補正量を導出する際に、加工中のワイヤガイド8の位置を計測しておく。そして、計測結果に基づいて、補正量記憶部3で記憶しておくワイヤ位置補正量を設定する。
つぎに、図12を用いてこの発明の実施の形態8について説明する。実施の形態8では、実施の形態6で説明した方法によってワイヤ位置補正量を導出する際に、加工中のワイヤガイド8の位置および被加工物14の変位量を計測しておく。そして、計測結果に基づいて、補正量記憶部3で記憶しておくワイヤ位置補正量を設定する。
つぎに、図13を用いてこの実施の発明の形態9について説明する。実施の形態5では、図8-2に示したような数値テーブル(表形式)を用いてワイヤ位置補正量を記憶しておく場合について説明したが、この実施の形態では、補正量記憶部3の代わりに、以下の式(1)に示す関数を用いて補正量決定部17でワイヤ位置補正量を生成する。なお、図13のワイヤ放電加工装置1bの構成は、補正量記憶部3が補正量決定部17に代わること以外は実施の形態1の図1と同じであるため、他の部分の説明は省略する。補正量決定部17へは、係数が入力される。
ここで、ΔYは、ワイヤ位置補正量、f()は関数、Tはワイヤ張力、Pは加工液圧力を示す。式(1)ではY軸方向の補正値のみを示しているが、X軸方向についても同様である。式(1)は具体的には、以下の式(2)で表される。
ここで、a、b、cは係数であり、加工形状の計測結果から同定する。また、ノズル30a,30bと被加工物14との間の距離である上部側距離Daまたは下部側距離Dbを考慮する場合、式(1)は以下の式(3)となる。式(3)では、上部側距離Daおよび下部側距離Dbを、Lで示している。
具体的には、式(3)は、以下の式(4)で近似できる。
ΔY=(a×T)+(d×P/L2)+e・・・(4)
ここで、d、eは係数であり、加工形状の計測結果から同定する。
Claims (9)
- 第1の位置でワイヤ電極を支持するとともに被加工物側に前記ワイヤ電極を送出する第1のワイヤガイドと、
前記第1の位置に対向する第2の位置で前記ワイヤ電極を支持するとともに前記被加工物側から送られてくる前記ワイヤ電極を巻き取る第2のワイヤガイドと、
前記第1のワイヤガイドの位置を移動させることによって、前記ワイヤ電極と前記被加工物との間の相対位置を変化させる第1の駆動部と、
前記第2のワイヤガイドの位置を移動させることによって、前記ワイヤ電極と前記被加工物との間の相対位置を変化させる第2の駆動部と、
前記被加工物に対して加工を行なう部分の加工形状に基づいて、前記第1の駆動部を制御する第1の駆動制御部と、
前記加工形状に基づいて、前記第2の駆動部を制御する第2の駆動制御部と、
前記第1のワイヤガイドと前記第2のワイヤガイドとの間に張架された前記ワイヤ電極の張力を含む加工条件を設定する加工条件設定部と、
前記加工条件に対応する前記ワイヤ電極への位置補正量を予め記憶しておく補正量記憶部と、
前記加工条件に対応する前記ワイヤ電極への位置補正量を前記補正量記憶部から読み出す補正量読み出し部と、
前記位置補正量に基づいて、前記ワイヤ電極と前記被加工物との間の相対距離を、前記第1および第2の駆動制御部に補正させるワイヤ位置補正部と、
を備えることを特徴とするワイヤ放電加工装置。 - 前記第1のワイヤガイドは、前記被加工物に加工液を供給する第1のノズルを有し、
前記第2のワイヤガイドは、前記被加工物に加工液を供給する第2のノズルを有し、
前記加工条件は、前記第1のノズルから供給される加工液の圧力と、前記第2のノズルから供給される加工液の圧力と、をさらに含むことを特徴とする請求項1に記載のワイヤ放電加工装置。 - 前記加工条件は、前記被加工物と前記第1のノズルとの間の距離と、前記被加工物と前記第2のノズルとの間の距離と、をさらに含むことを特徴とする請求項2に記載のワイヤ放電加工装置。
- 前記加工条件は、前記ワイヤ電極の剛性、前記ワイヤ電極の径、および前記第1のワイヤガイドと前記第2のワイヤガイドとの間の距離を、さらに含むことを特徴とする請求項2または3に記載のワイヤ放電加工装置。
- 前記加工条件は、前記被加工物の剛性および前記被加工物の形状を、さらに含むことを特徴とする請求項2~4のいずれか1つに記載のワイヤ放電加工装置。
- 前記位置補正量は、複数種類の加工条件で加工された前記被加工物の加工後の形状を計測することによって、決定されることを特徴とする請求項1~5のいずれか1つに記載のワイヤ放電加工装置。
- 前記位置補正量は、複数種類の加工条件で加工している間に計測された前記第1および第2のワイヤガイドの変位量に基づいて決定されることを特徴とする請求項1~5のいずれか1つに記載のワイヤ放電加工装置。
- 前記位置補正量は、複数種類の加工条件で加工している間に計測された前記被加工物の変位量を用いて決定されることを特徴とする請求項5に記載のワイヤ放電加工装置。
- 第1の位置でワイヤ電極を支持するとともに被加工物側に前記ワイヤ電極を送出する第1のワイヤガイドに対し、前記第1のワイヤガイドの位置を移動させることによって、前記ワイヤ電極と前記被加工物との間の相対位置を変化させる第1の駆動部を、前記被加工物に対して加工を行なう部分の加工形状に基づいて、制御する第1の駆動制御部と、
前記第1の位置に対向する第2の位置で前記ワイヤ電極を支持するとともに前記被加工物側から送られてくる前記ワイヤ電極を巻き取る第2のワイヤガイドに対し、前記第2のワイヤガイドの位置を移動させることによって、前記ワイヤ電極と前記被加工物との間の相対位置を変化させる第2の駆動部を、前記加工形状に基づいて、制御する第2の駆動制御部と、
前記第1のワイヤガイドと前記第2のワイヤガイドとの間に張架された前記ワイヤ電極の張力を含む加工条件を設定する加工条件設定部と、
前記加工条件に対応する前記ワイヤ電極への位置補正量を予め記憶しておく補正量記憶部と、
前記加工条件に対応する前記ワイヤ電極への位置補正量を前記補正量記憶部から読み出す補正量読み出し部と、
前記位置補正量に基づいて、前記ワイヤ電極と前記被加工物との間の相対距離を、前記第1および第2の駆動制御部に補正させるワイヤ位置補正部と、
を備えることを特徴とする制御装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2013510147A JP5289643B1 (ja) | 2012-10-30 | 2012-10-30 | ワイヤ放電加工装置および制御装置 |
CN201280009683.6A CN104023891B (zh) | 2012-10-30 | 2012-10-30 | 线电极放电加工装置及控制装置 |
PCT/JP2012/078067 WO2014068681A1 (ja) | 2012-10-30 | 2012-10-30 | ワイヤ放電加工装置および制御装置 |
US13/979,928 US9463520B2 (en) | 2012-10-30 | 2012-10-30 | Wire electric discharge machining apparatus and control device |
DE112012000920.7T DE112012000920B4 (de) | 2012-10-30 | 2012-10-30 | Drahterodierbearbeitungsvorrichtung und Steuervorrichtung |
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PCT/JP2012/078067 WO2014068681A1 (ja) | 2012-10-30 | 2012-10-30 | ワイヤ放電加工装置および制御装置 |
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US (1) | US9463520B2 (ja) |
JP (1) | JP5289643B1 (ja) |
CN (1) | CN104023891B (ja) |
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WO (1) | WO2014068681A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016104507A (ja) * | 2014-11-19 | 2016-06-09 | ファナック株式会社 | 上下面独立コーナ形状補正機能を有するワイヤ放電加工機 |
US10307847B2 (en) | 2014-11-19 | 2019-06-04 | Fanuc Corporation | Wire electric discharge machine having corner shape correcting function |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5638053B2 (ja) | 2012-11-13 | 2014-12-10 | ファナック株式会社 | ワイヤ放電加工機の制御装置、ワイヤ放電加工機およびワイヤ放電加工方法 |
JP5657715B2 (ja) * | 2013-01-11 | 2015-01-21 | ファナック株式会社 | ワイヤ電極位置補正機能を有するワイヤ放電加工機 |
FR3041892B1 (fr) * | 2015-10-02 | 2018-03-23 | Thermocompact | Procede et dispositif d'identification de fil d'electroerosion sur bobine, et application aux usinages par machine d'electroerosion a fil |
JP6469045B2 (ja) * | 2016-07-13 | 2019-02-13 | ファナック株式会社 | ワイヤ放電加工機 |
JP7384566B2 (ja) * | 2019-04-05 | 2023-11-21 | ファナック株式会社 | 制御装置、演算装置および制御方法 |
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WO1988003074A1 (en) * | 1986-10-24 | 1988-05-05 | Mitsubishi Denki Kabushiki Kaisha | Electric discharge apparatus |
JPH10263933A (ja) * | 1997-03-24 | 1998-10-06 | Hitachi Seiko Ltd | ワイヤ放電加工方法およびワイヤ放電加工装置 |
JP2004351571A (ja) * | 2003-05-29 | 2004-12-16 | Fanuc Ltd | ノズル隙間調整方法 |
JP2009136999A (ja) * | 2007-12-04 | 2009-06-25 | Ind Technol Res Inst | 変形補償装置を具えたワイヤカット放電加工機 |
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US4703143A (en) * | 1984-12-25 | 1987-10-27 | Amada Company, Limited | Wire EDM method for preventing wire lagging during machining of an angular corner and workpiece position control |
JPH02160424A (ja) * | 1988-12-15 | 1990-06-20 | Mitsubishi Electric Corp | ワイヤ放電加工装置のワイヤ電極の位置補正方法 |
JPH0355127A (ja) | 1989-07-19 | 1991-03-08 | Mitsubishi Electric Corp | ワイヤ放電加工装置およびワイヤ電極位置補正装置 |
JP2734277B2 (ja) | 1992-03-06 | 1998-03-30 | 三菱電機株式会社 | ワイヤ放電加工装置 |
JP3552753B2 (ja) | 1994-08-08 | 2004-08-11 | ファナック株式会社 | ワイヤ直角度制御方法 |
JP2006159396A (ja) | 2004-11-15 | 2006-06-22 | Fanuc Ltd | ワイヤ放電加工機及びワイヤ放電加工方法 |
JP4472558B2 (ja) * | 2005-03-03 | 2010-06-02 | 株式会社ソディック | ワイヤカット放電加工方法 |
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2012
- 2012-10-30 WO PCT/JP2012/078067 patent/WO2014068681A1/ja active Application Filing
- 2012-10-30 DE DE112012000920.7T patent/DE112012000920B4/de active Active
- 2012-10-30 JP JP2013510147A patent/JP5289643B1/ja active Active
- 2012-10-30 CN CN201280009683.6A patent/CN104023891B/zh active Active
- 2012-10-30 US US13/979,928 patent/US9463520B2/en not_active Expired - Fee Related
Patent Citations (4)
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WO1988003074A1 (en) * | 1986-10-24 | 1988-05-05 | Mitsubishi Denki Kabushiki Kaisha | Electric discharge apparatus |
JPH10263933A (ja) * | 1997-03-24 | 1998-10-06 | Hitachi Seiko Ltd | ワイヤ放電加工方法およびワイヤ放電加工装置 |
JP2004351571A (ja) * | 2003-05-29 | 2004-12-16 | Fanuc Ltd | ノズル隙間調整方法 |
JP2009136999A (ja) * | 2007-12-04 | 2009-06-25 | Ind Technol Res Inst | 変形補償装置を具えたワイヤカット放電加工機 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016104507A (ja) * | 2014-11-19 | 2016-06-09 | ファナック株式会社 | 上下面独立コーナ形状補正機能を有するワイヤ放電加工機 |
US10307847B2 (en) | 2014-11-19 | 2019-06-04 | Fanuc Corporation | Wire electric discharge machine having corner shape correcting function |
Also Published As
Publication number | Publication date |
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JP5289643B1 (ja) | 2013-09-11 |
US20140116991A1 (en) | 2014-05-01 |
CN104023891B (zh) | 2016-04-13 |
US9463520B2 (en) | 2016-10-11 |
DE112012000920T5 (de) | 2014-08-07 |
CN104023891A (zh) | 2014-09-03 |
JPWO2014068681A1 (ja) | 2016-09-08 |
DE112012000920B4 (de) | 2019-07-11 |
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