CN115243818A - Automatic wire connecting device and wire electric discharge machine - Google Patents
Automatic wire connecting device and wire electric discharge machine Download PDFInfo
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- CN115243818A CN115243818A CN202080098156.1A CN202080098156A CN115243818A CN 115243818 A CN115243818 A CN 115243818A CN 202080098156 A CN202080098156 A CN 202080098156A CN 115243818 A CN115243818 A CN 115243818A
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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
- B23H7/08—Wire electrodes
- B23H7/10—Supporting, winding or electrical connection of wire-electrode
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Abstract
An automatic wire connection device (1) automatically connects a wire electrode (11) in a wire electric discharge machine. The automatic wire connecting device (1) is provided with a cutting state detection part (33), and the cutting state detection part (33) detects the cutting state when the wire electrode (11) is cut. The automatic wire connection device (1) is provided with a determination unit (34), and the determination unit (34) determines whether the wire electrode (11) is qualified or not in connection with the cutting based on the cutting state. The automatic wire connection device (1) is provided with a wire connection execution unit (35), and the wire connection execution unit (35) determines execution of operation wire connection based on the result of the qualification determination.
Description
Technical Field
The present invention relates to an automatic wire connection device for automatically connecting wire electrodes in a wire electric discharge machine, and a wire electric discharge machine.
Background
The wire electric discharge machine comprises: a wire feeding unit that draws out the wire electrode from the wire bobbin and feeds out the drawn-out wire electrode; an upper guide section which is disposed above the workpiece and guides the wire electrode; a lower guide part which is arranged below the processed object and guides the wire electrode; and a wire collecting unit that collects the used wire electrode. When a wire electrode is newly loaded or broken, the wire electric discharge machine feeds the wire electrode from the wire supply unit to the wire collection unit, thereby automatically connecting the wire electrode. In the following description, a configuration used for automatic wire connection in a wire electric discharge machine is sometimes referred to as an automatic wire connection device. Generally, an automatic wire connecting device performs a wire connecting operation through cutting of a wire electrode and an annealing process for ensuring straightness of the wire electrode.
Patent document 1 discloses an automatic wire connection device that detects a section in which an obstacle exists during wire connection, stores a count value of the number of times of automatic wire connection failure for each section, and switches a parameter for automatic wire connection based on the count value for each section. In the automatic wire connecting device of patent document 1, when a specific section often has a failure, the cause of the failure is determined based on the position of the section where the failure has occurred and the count value. The automatic wire connecting device of patent document 1 automatically performs a correction operation by selecting an optimum condition from conditions classified by reason and switching parameters.
Patent document 1: japanese patent No. 5180363
Disclosure of Invention
In the automatic wire connecting device of patent document 1, when the wire electrode is cut by passing current to the wire electrode, a melt of the wire electrode may remain in a spherical shape at a distal end portion of the wire electrode. If the wire connection operation is performed while the spherical portion remains, the wire electrode such as the upper guide or the lower guide may be clogged. When the wire electrode is clogged, the wire electrode is prevented from being fed forward of the position where the wire electrode is clogged, and thus the wire connection operation fails. The automatic wire connecting device of patent document 1 changes parameters if a failure of a connecting operation is detected, and cuts the wire electrode for the next connecting operation. The remaining segment of the wire electrode including the spherical portion remains on the path through which the wire electrode passes, and thus the wire electrode is prevented from being fed out during the wire connection operation after the wire electrode is cut, and the wire connection operation may fail again. In this case, even if the parameters are changed to appropriate parameters, the wire connection operation cannot be successfully performed unless the broken segment of the wire electrode is manually removed. As described above, the conventional automatic wire connecting device disclosed in patent document 1 cannot avoid a situation in which automatic wire connection cannot be performed due to clogging of the wire electrode.
The present invention has been made in view of the above circumstances, and an object thereof is to obtain an automatic wire connecting device capable of avoiding a state in which automatic connection cannot be performed due to clogging of a wire electrode.
In order to solve the above problems and achieve the object, an automatic wire connection device according to the present invention automatically connects wire electrodes in a wire electric discharge machine. The automatic wire connecting device according to the present invention comprises: a cutting state detection unit that detects a cutting state when the wire electrode is cut; a determination unit that determines, based on the cutting state, whether or not the wire electrode is cut; and a wire connection execution unit that determines execution of a wire connection operation based on a result of the acceptance determination.
ADVANTAGEOUS EFFECTS OF INVENTION
The automatic wire connection device according to the present invention has an effect that it is possible to avoid a state in which automatic connection is impossible due to clogging of a wire electrode.
Drawings
Fig. 1 is a diagram illustrating an automatic wire connecting device in a wire electric discharge machine according to embodiment 1.
Fig. 2 is a flowchart showing an operation procedure of the automatic wire connecting device according to embodiment 1.
Fig. 3 is a diagram for explaining the clogging of the wire electrode that can be prevented in the automatic wire connecting device according to embodiment 1.
Fig. 4 is a diagram illustrating an automatic wire connecting device in the wire electric discharge machine according to embodiment 2.
Fig. 5 is a flowchart showing an operation procedure of the automatic wire connecting device according to embodiment 2.
Fig. 6 is a diagram showing an automatic wire connecting device in the wire electric discharge machine according to embodiment 3.
Fig. 7 is a flowchart showing an operation procedure of the automatic wire connecting device according to embodiment 3.
Fig. 8 is a block diagram showing a functional configuration of a learning device included in the automatic wire connecting device according to embodiment 3.
Fig. 9 is a flowchart showing a processing procedure of the learning device in embodiment 3.
Fig. 10 is a block diagram showing a functional configuration of an estimation device included in the automatic wire connecting device according to embodiment 3.
Fig. 11 is a flowchart showing a processing procedure of the estimation device in embodiment 3.
Fig. 12 is a diagram showing an example of a hardware configuration of the automatic wire adjustment unit according to embodiments 1 to 3.
Detailed Description
Hereinafter, an automatic wire connecting device and a wire electric discharge machine according to the embodiment will be described in detail with reference to the drawings.
Embodiment 1.
Fig. 1 is a diagram illustrating an automatic wire connecting device in a wire electric discharge machine according to embodiment 1. The wire electric discharge machine repeats electric discharge between the wire electrode 11 and the workpiece 17. The wire electric discharge machine cuts the workpiece 17 or removes a part of the workpiece 17 by electric discharge machining using electric discharge energy. The automatic wire connection device 1 automatically connects a wire electrode 11 in a wire electric discharge machine.
A wire bobbin 10 on which a wire electrode 11 is wound is mounted on the electric discharge machine. The automatic wire connecting device 1 includes: pulleys 12a, 12b for switching the direction of the wire electrode 11 pulled out from the wire bobbin 10; a supply roller 13 as a thread supply portion; and pinch rollers 14a and 14b that press the wire electrode 11 against the supply roller 13. The supply roller 13 pulls out the wire electrode 11 from the wire bobbin 10, and feeds out the pulled-out wire electrode 11. The feed roller 13 also performs an operation of pulling back the wire electrode 11 in the direction opposite to the feeding direction.
The automatic wire connection device 1 includes: an upper guide portion 16a and a lower guide portion 16b that guide the wire electrode 11; a guide roller 18 for switching the feeding direction of the wire electrode 11; and a wire collecting unit 19 that collects the wire electrode 11 used for electric discharge machining.
The upper guide portion 16a is disposed between the workpiece 17 and the feeder 15a, and the feeder 15a is disposed above the workpiece 17. The lower guide portion 16b is disposed between the workpiece 17 and the feeder 15b, and the feeder 15b is disposed below the workpiece 17. The power feeding members 15a and 15b supply a machining current to the wire electrode 11. The automatic wire connection device 1 feeds the wire electrode 11 vertically downward from the supply roller 13 to the guide roller 18. The guide rollers 18 switch the direction of the wire electrode 11 from the vertical direction to the horizontal direction.
The wire collecting unit 19 discharges the wire electrode 11 by feeding the wire electrode 11 fed from the guide roller 18 to a collecting location not shown. When the wire electrode 11 is newly loaded or when the wire electrode 11 is disconnected, the automatic wire connecting device 1 automatically connects the wire electrode 11 by sending the wire electrode 11 from the supply roller 13 to the wire collecting unit 19.
The automatic wire connecting device 1 includes: an annealing section 20 for annealing the wire electrode 11; a cutting unit 21 that cuts the wire electrode 11; a camera 22 for imaging the cut portion of the wire electrode 11; and a pinch roller 23 that grips the wire electrode 11. Cutting of the wire electrode 11 and annealing to the wire electrode 11 are steps performed in preparation for the wire connection operation, and are included in the step of automatic wire connection.
The annealing portion 20 has electrodes 24a and 24b. The annealing section 20 causes the electrodes 24a and 24b to contact the wire electrode 11, thereby flowing a current to the wire electrode 11. The annealing section 20 allows a current to flow to the wire electrode 11 during the annealing. In the annealing process, a current flows through the wire electrode 11, so that heat corresponding to the resistance of the wire electrode 11 is generated in the wire electrode 11.
In the annealing process, the pinch rollers 23 grip the wire electrode 11, thereby fixing the wire electrode 11 at the position of the pinch rollers 23. The wire electrode 11 is pulled back by the feed roller 13 with the wire electrode 11 fixed by the pinch roller 23, thereby applying tension to the wire electrode 11. The wire electrode 11 is straightened by generating heat and applying tension. In addition, the surface of the wire electrode 11 is smoothed by the generation of heat and the application of tension. After the annealing process is completed, the supply roller 13 stops the wire electrode 11 from being pulled back. The pinch rollers 23 leave the wire electrode 11. The annealing section 20 separates the electrodes 24a and 24b from the wire electrode 11.
The cutting portion 21 has an electrode 25. The cutting unit 21 causes the electrode 25 to contact the wire electrode 11, thereby flowing a current to the wire electrode 11. The cutting unit 21 blows the wire electrode 11 by flowing a current to the wire electrode 11. The wire electrode 11 is pulled back by the feed roller 13 with the wire electrode 11 fixed by the pinch roller 23, thereby applying tension to the wire electrode 11. After the wire electrode 11 is cut, the supply roller 13 stops the pull-back of the wire electrode 11. The pinch rollers 23 are away from the wire electrode 11. The cutting unit 21 separates the electrode 25 from the wire electrode 11. The camera 22 images the distal end portion of the wire electrode 11 cut by the cutting unit 21. Alternatively, the camera 22 images the wire electrode 11 when cut by the cutting unit 21.
The automatic wire connecting device 1 includes an automatic wire connecting adjustment unit 30 that adjusts the wire connecting operation. The automatic wire adjustment unit 30 is a structure used for controlling automatic wire connection in a numerical control device that controls a wire electric discharge machine. That is, the automatic wire adjustment unit 30 is a part of the numerical control device.
The automatic wire adjustment unit 30 includes: a cutting state detection unit 33 that detects the cutting state of the wire electrode 11; a determination unit 34 that determines whether or not the wire electrode 11 has been cut based on the cutting state; and a wire connection execution unit 35 that determines execution of a wire connection operation based on the result of the acceptance/rejection determination. The cutting state detection unit 33 detects a cutting state when the automatic neutral wire electrode 11 is cut.
The automatic wire adjustment unit 30 includes: a power supply control unit 31 that controls power supply to each unit of the automatic wire connecting device 1; and a parameter setting unit 32 that sets parameters for automatic wire connection. The parameter setting unit 32 outputs the set parameter to the power supply control unit 31. The power supply control unit 31 supplies electric power to a motor that drives the supply roller 13. The power supply control unit 31 controls the feeding of the wire electrode 11 by the feeding roller 13 and the pulling of the wire electrode 11 by the feeding roller 13 by supplying power to the motor. Illustration of the motor is omitted. The power supply control unit 31 supplies power to the annealing unit 20 and the cutting unit 21.
The cut-off state detection unit 33 includes a tension detection unit 36, an annealing current detection unit 37, a cut-off current detection unit 38, and an image acquisition unit 39. The tension detecting unit 36 detects the tension of the wire electrode 11. The annealing current detector 37 detects an annealing current. The annealing current is a current flowing through the wire electrode 11 in the annealing treatment. The off current detection unit 38 detects the off current. The cutting current is a current flowing through the wire electrode 11 when the wire electrode 11 is cut. The image acquiring unit 39 acquires an image captured by the camera 22.
The tension detecting unit 36 measures tension variation of the wire electrode 11 when the wire electrode 11 is cut. The cutting state detection unit 33 detects the state of the tension of the wire electrode 11 when the wire electrode 11 is cut by measurement in the tension detection unit 36, and 1 element of the cutting state is detected. The tension detecting unit 36 measures tension fluctuation of the wire electrode 11 when the wire electrode 11 is annealed. The cutting state detection unit 33 detects the state of the tension of the wire electrode 11 during the annealing process by the measurement by the tension detection unit 36, and determines 1 element of the cutting state.
The annealing current detector 37 measures an annealing current when the wire electrode 11 is annealed. The interruption state detection unit 33 detects the state of the annealing current by measurement in the annealing current detection unit 37, and determines 1 element of the interruption state.
The breaking current detection unit 38 measures a breaking current when the wire electrode 11 is broken. The interruption state detection unit 33 detects the state of the interruption current by the measurement of the interruption current detection unit 38, and 1 element of the interruption state is detected.
The image acquisition unit 39 acquires an image obtained by imaging the distal end of the cut wire electrode 11. The image acquiring unit 39 measures the shape of the cut portion, i.e., the tip portion, of the wire electrode 11 based on the image. The cutting state detection unit 33 detects the shape of the distal end portion of the wire electrode 11 by the measurement of the image acquisition unit 39, and determines 1 element of the cutting state.
The image acquiring unit 39 acquires an image obtained by imaging the wire electrode 11 when cut by the cutting unit 21. The image acquiring unit 39 measures the light emission color when the wire electrode 11 is cut or the light emission intensity when the wire electrode 11 is cut, based on the image. The cutting state detection unit 33 detects the light emission state when the wire electrode 11 is cut by measurement in the image acquisition unit 39, and 1 element of the cutting state is detected. The light emission state is a light emission color or a light emission magnitude.
As described above, the cut state detected by the cut state detection unit 33 includes the tension state of the wire electrode 11, the annealing current state, the cut current state, the shape of the distal end of the wire electrode 11, and the light emission state. The cut-off state detection unit 33 outputs information indicating the detected cut-off state to the determination unit 34.
The determination unit 34 compares the cut state detected by the cut state detection unit 33 with a determination criterion, and thereby determines whether or not the cut is acceptable. The determination criterion is set in advance in the automatic wire connecting apparatus 1 based on a result obtained by an experiment of cutting the wire electrode 11 or a result obtained by simulation of cutting the wire electrode 11. The determination unit 34 determines that the cutting is acceptable when the cut state satisfies a determination criterion for determining that the cutting is acceptable. The determination unit 34 determines that the cutting is defective when the cut state does not satisfy the determination criterion for determining that the cut state is acceptable. The determination unit 34 outputs information indicating the result of the acceptance determination to the wire connection execution unit 35.
The wire connection executing unit 35 determines to execute the wire connection operation when the information indicating that the wire connection is determined to be acceptable is input. The connection performing unit 35 instructs the power supply control unit 31 to perform the connection operation if it determines to perform the connection operation. The power supply control unit 31 starts feeding of the wire electrode 11 by the supply roller 13 in accordance with an instruction from the wire connection execution unit 35. On the other hand, when the information indicating that the determination is not acceptable is input, the wire connection executing unit 35 stops the wire connection operation.
Next, an operation of automatic wire connection performed by the automatic wire connecting device 1 will be described. Fig. 2 is a flowchart showing an operation procedure of the automatic wire connecting device according to embodiment 1.
In step S1, the automatic wire connection device 1 sets parameters for automatic wire connection. The set parameters include a cutting current parameter indicating a current flowing through the cutting unit 21, a cutting tension parameter indicating a tension applied to the wire electrode 11 at the time of cutting, an annealing current parameter indicating a current flowing through the annealing unit 20, and an annealing tension parameter indicating a tension applied to the wire electrode 11 at the time of annealing. The parameter as an initial condition is stored in the numerical controller in advance. The parameter setting unit 32 reads the parameters stored in the numerical controller, and sets the parameters as initial conditions. The parameter setting unit 32 outputs the set parameter to the power supply control unit 31.
In step S2, the automatic wire connection device 1 cuts the wire electrode 11. The operation of the automatic wire connection device 1 in step S2 includes a 1 st operation of cutting the wire electrode 11 and a 2 nd operation of performing annealing treatment on the wire electrode 11.
In the 1 st operation, the power supply control unit 31 causes a current according to the set cutoff current parameter to flow to the electrode 25. The power supply control unit 31 causes the supply roller 13 to perform a pull-back operation in accordance with the cutoff tension parameter by causing a current in accordance with the cutoff tension parameter to flow to the motor. The wire electrode 11 fixed at the position of the pinch roller 23 is stretched by the supply roller 13, thereby giving tension to the wire electrode 11. The automatic wire connecting device 1 applies tension to the wire electrode 11 and causes a current to flow through the wire electrode 11 in the cutting unit 21, thereby cutting the wire electrode 11. A portion of the wire electrode 11 closer to the wire collecting unit 19 than the cut portion is collected by the wire collecting unit 19.
Next, the automatic wire connecting device 1 causes the feed roller 13 to perform a feeding operation, and the cut wire electrode 11 is gripped by the pinch roller 23. The automatic wire connecting device 1 starts the 2 nd action. In the 2 nd operation, the power supply control unit 31 causes a current according to the set annealing current parameter to flow to the electrodes 24a and 24b. The power supply control unit 31 causes the supply roll 13 to perform the pull-back operation in accordance with the annealing tension parameter by causing a current in accordance with the annealing tension parameter to flow to the motor. The wire electrode 11 fixed at the position of the pinch roller 23 is stretched by the supply roller 13, thereby giving tension to the wire electrode 11. The automatic wire connection device 1 applies tension to the wire electrode 11 and performs annealing on the wire electrode 11 by flowing current to the wire electrode 11 in the annealing unit 20.
In step S3, the automatic wire connecting device 1 detects the cutting state of the wire electrode 11 in step S2. The cutting state detection unit 33 detects a state of a cutting current at the time of cutting and a state of tension at the time of cutting as an element of the cutting state. The cut-off state detection unit 33 detects the state of the annealing current during the annealing process and the state of the tension during the annealing process as elements of the cut-off state. The cutting state detection unit 33 detects the shape of the distal end portion of the wire electrode 11 as an element of the cutting state. The cut-off state detection unit 33 detects the light emission state at the time of cutting as an element of the cut-off state.
In step S4, the automatic wire connecting device 1 determines whether or not the detected cut-off state satisfies the criterion of being qualified. That is, in the automatic wire connecting device 1, the determination unit 34 performs the acceptance/rejection determination regarding the cutting of the wire electrode 11. The determination unit 34 may determine whether or not the detected cut-off state meets a criterion of being determined as a non-defective, as the non-defective determination.
Here, a specific example of the qualification judgment will be described. When the wire electrode 11 is not sufficiently stretched during cutting, a ball, which is a melt of the wire electrode 11, may remain at the distal end of the wire electrode 11. For example, if there is an abnormality that the cutting current is too large or an abnormality that the tension at the time of cutting is too small, the wire electrode 11 may not be stretched sufficiently at the time of cutting, and a ball of molten material may be formed. On the other hand, when the wire electrode 11 is normally cut, the ball of the molten material is not formed at the distal end portion of the wire electrode 11, and the distal end portion of the wire electrode 11 has a straight shape. The automatic wire connecting device 1 is preset with shape data as a criterion for determining that the wire connecting device is acceptable. The determination unit 34 determines a difference from a criterion determined to be acceptable with respect to the detected shape. When the obtained difference is within a preset allowable range, the determination unit 34 determines that the cut-off state satisfies the criterion of being determined as acceptable. On the other hand, when the obtained difference exceeds the allowable range, the determination unit 34 determines that the cut-off state does not satisfy the criterion for determining that the cut-off state is acceptable.
The light emission color when the cutting of the wire electrode 11 is abnormal may be different from the light emission color when the wire electrode 11 is normally cut. The determination unit 34 may determine a difference between the reference emission color and the measured emission color, and determine whether or not the cut-off state satisfies the criterion of being determined as acceptable, based on the determined difference.
The magnitude of light emission when there is an abnormality in cutting of the wire electrode 11 may be different from the magnitude of light emission when the wire electrode 11 is normally cut. The determination unit 34 may determine a difference between the magnitude of the light emission serving as a reference and the magnitude of the measured light emission, and determine whether or not the cut-off state satisfies the criterion of being determined as acceptable, based on the determined difference.
When the wire electrode 11 is normally cut, it is estimated that a certain ratio of tension fluctuation is maintained by applying tension to the wire electrode 11 while the wire electrode 11 is melted. On the other hand, when there is an abnormality that the cutting current is too small or the tension at the time of cutting is too large, it is estimated that the tension fluctuates instantaneously by applying tension to the wire electrode 11 in an insufficiently melted state and cutting the wire electrode 11. As described above, the tension fluctuation shows a difference between the case where the cutting of the wire electrode 11 is normal and the case where the cutting is abnormal. The determination unit 34 can determine whether or not the cut state satisfies the criterion for determining the pass state by comparing the measurement result of the tension fluctuation at the time of cutting with the reference tension fluctuation.
The determination unit 34 determines whether or not the cut-off state satisfies the criterion for determining that the cut-off state is acceptable, based on the difference between the measured cut-off current and the reference cut-off current. The determination unit 34 can determine whether or not the cut state satisfies the criterion of being determined as acceptable by comparing the measurement result of the variation in the cut current with the current variation serving as the criterion.
The determination unit 34 determines whether or not the cut-off state satisfies the criterion for determining pass, based on the difference between the measured annealing current and the reference annealing current, with respect to the annealing current. The determination unit 34 can determine whether or not the cut state satisfies the criterion for determining the pass by comparing the measurement result of the variation in the annealing current with the reference current variation. The determination unit 34 can determine whether or not the cut state satisfies the criterion for determining the pass state by comparing the measurement result of the tension fluctuation during the annealing process with the reference tension fluctuation.
The determination unit 34 determines that the cut-off state does not satisfy the criterion for determination as acceptable when at least 1 of the state of the tension of the wire electrode 11, the state of the annealing current, the state of the cutting current, the shape of the distal end portion of the wire electrode 11, and the light emission state does not satisfy the criterion for determination as acceptable. The determination unit 34 may determine that the cut state does not satisfy the criterion for determining the pass state when at least 1 of the state of the tension of the wire electrode 11, the state of the annealing current, the state of the cutting current, the shape of the tip portion of the wire electrode 11, and the light emission state satisfies the criterion for determining the fail.
When the cut state satisfies the criterion of the qualified judgment (Yes in step S4), the wire connection performing unit 35 determines to perform the automatic wire connection. Thereby, in step S5, the automatic wire connecting device 1 performs the wire connecting operation. On the other hand, when the cut state does not satisfy the criterion for determining the pass (No at step S4), the automatic wire connecting device 1 does not perform the wire connecting operation. In this way, the automatic wire connection device 1 ends the automatic wire connection. When it is determined that the cutting state of the wire electrode 11 is not satisfactory, the automatic wire connecting device 1 stops the wire connecting operation and ends the automatic wire connecting operation.
If the cutting fails, the wire electrode 11 may be easily caught in the path of the wire electrode 11 due to a problem that a ball of molten material remains at the tip of the wire electrode 11. Due to the cutting failure, there is a possibility that the tip of the wire electrode 11 is deformed in addition to the problem of the ball of the melt remaining. When the automatic wire connecting device 1 performs the wire connecting operation even if the wire electrode 11 has a problem as described above, the wire electrode 11 may be clogged in the path of the wire electrode 11. In embodiment 1, the automatic wire connection device 1 stops the connection operation when it is determined that the cutting of the wire electrode 11 is not satisfactory, thereby preventing the wire electrode 11 from being clogged in advance.
Fig. 3 is a diagram for explaining the clogging of the wire electrode that can be prevented in the automatic wire connecting device according to embodiment 1. Here, assuming that the automatic line connecting device 1 performs the wire connecting operation when there is a failure in the disconnection, a case where the wire connecting operation fails will be described. Fig. 3 shows a state before the wire electrode 11 is cut, a state in which a ball 11a of molten material remains at the distal end portion of the wire electrode 11 by cutting of the wire electrode 11 in the cutting unit 21, and a state after the wire electrode 11 having the ball 11a is subjected to a wire connecting operation.
For example, in the wire connecting operation with respect to the wire electrode 11 having the ball 11a, after the ball 11a passes through the upper guide 16a, clogging occurs in the lower guide 16 b. In this case, the automatic wire connecting device 1 recognizes that the wire connecting operation has failed by not sending the wire electrode 11 to the wire collecting unit 19. When the wire connection operation fails, the automatic wire connection device 1 cuts the wire electrode 11, and attempts the wire connection operation again.
In the rewiring operation, a portion of the wire electrode 11 above the cut portion is used. The portion of the wire electrode 11 below the cut portion, that is, the portion including the ball 11a, is discharged from the path of the wire electrode 11 by pulling back the wire automatic connection device 1 upward or the like. In this discharging step, if the wire electrode 11 is pulled back with the ball 11a caught in the path of the wire electrode 11 and the wire electrode 11 is pulled apart, the broken piece of the wire electrode 11 including the ball 11a remains in the path without being discharged. Since the residual portion remaining in the path of the wire electrode 11 interferes with the subsequent wire connection operation, the automatic wire connecting device 1 cannot successfully connect the wire unless the residual portion is manually removed.
According to embodiment 1, the automatic wire connecting device 1 determines whether or not the wire electrode 11 is cut based on the cutting state, and determines the execution of the wire connecting operation based on the result of the determination. Thus, the automatic wire connection device 1 can prevent the wire electrode 11 from being clogged in advance, and therefore, it is possible to avoid the automatic connection failure due to clogging of the wire electrode 11.
In addition, the cutting state detected by the cutting state detection unit 33 may include at least 1 of a state of tension of the wire electrode 11, a state of annealing current, a state of cutting current, a shape of the tip of the wire electrode 11, and a light emission state. Thus, the cutting state detection unit 33 can perform state detection for the quality determination with respect to cutting of the wire electrode 11. The determination unit 34 may be configured to perform the pass/fail determination regarding cutting of the wire electrode 11 based on at least 1 of the state of the tension of the wire electrode 11, the state of the annealing current, the state of the cutting current, and the shape and the light emission state of the distal end portion of the wire electrode 11. This prevents the automatic wire connecting device 1 from becoming unable to automatically connect the wire due to the clogging of the wire electrode 11.
Fig. 4 is a diagram illustrating an automatic wire connecting device in the wire electric discharge machine according to embodiment 2. In embodiment 2, the automatic wire connection adjusting unit 40 of the automatic wire connecting device 2 adjusts parameters for automatic wire connection based on the result of the acceptance/rejection determination and whether or not the automatic wire connection is successful. In embodiment 2, the same components as those in embodiment 1 are denoted by the same reference numerals, and the description will be mainly given of a configuration different from that in embodiment 1.
The automatic wire adjustment portion 40 has the same components as the automatic wire adjustment portion 30 in embodiment 1. The automatic wire adjustment unit 40 includes a wire information input unit 41, a wire connection detection unit 42, and a parameter adjustment unit 43.
The line information is input to the line information input section 41. The wire information is information related to the specification of the wire electrode 11. The on-line information includes information such as the material of the wire electrode 11, the thickness of the wire electrode 11, and the manufacturer of the wire electrode 11. The line information input unit 41 outputs the input line information to the parameter adjusting unit 43.
The wire connection detection unit 42 detects whether or not the automatic wire connection by the automatic wire connection device 2 is successful. The connection detecting unit 42 determines that the automatic connection has been successful when the wire electrode 11 is sent out from the wire collecting unit 19 by the connection operation. The wire connection detecting unit 42 determines that the automatic wire connection has failed when the wire electrode 11 has not reached the wire collecting unit 19 although the wire electrode 11 having a length that can reach the wire collecting unit 19 is fed from the feeding roller 13. The connection detecting unit 42 outputs information indicating whether or not the automatic connection is successful to the parameter adjusting unit 43.
The wire connection executing unit 35 determines execution of automatic wire connection, as in the case of embodiment 1. When information indicating that the determination result is not acceptable is input, the connection performing unit 35 instructs the parameter adjusting unit 43 to adjust the parameters.
The parameter adjusting unit 43 adjusts the parameter set in the parameter setting unit 32 when there is an instruction from the wire connection performing unit 35 or when information indicating an automatic wire connection failure is input. The parameter adjusting unit 43 outputs the adjusted parameters to the parameter setting unit 32. The parameter adjustment unit 43 notifies the wire connection performing unit 35 of the fact that the parameter adjustment has been performed. The wire connection performing unit 35, upon receiving the notification from the parameter adjusting unit 43, determines to perform the wire connection operation according to the parameter adjusted by the parameter adjusting unit 43.
Next, an operation of automatic wire connection performed by the wire automatic wiring device 2 will be described. Fig. 5 is a flowchart showing an operation procedure of the automatic wire connecting device according to embodiment 2. Steps S1 to S5 shown in fig. 5 are the same as steps S1 to S5 shown in fig. 2. When the cut state does not satisfy the criterion for the determination of pass (No at step S4), the automatic wire connecting device 2 proceeds to step S7 described later in the sequence. After step S5, the automatic wire connecting device 2 advances the sequence to step S6 to be described below.
In step S6, the automatic wire connecting device 2 determines whether or not the wire connection is successful in the wire connection detecting unit 42. If the wire connection is successful (Yes at step S6), the automatic wire connecting device 2 ends the operation according to the sequence shown in fig. 5. On the other hand, when the wire connection fails (No at step S6), the automatic wire connecting device 2 advances the procedure to step S7 described below.
In step S7, the automatic wire connecting device 2 adjusts the parameters in the parameter adjusting unit 43. That is, the parameter adjusting unit 43 adjusts the parameter set in the parameter setting unit 32 when the cutting state does not satisfy the criterion for determining the pass or when the wire connection fails. As described above, the parameter adjustment unit 43 adjusts the parameters based on the result of the pass/fail determination by the determination unit 34 and whether or not the automatic wire connection has succeeded. When the adjustment of the parameters in step S7 is completed, the wire connection executing unit 35 determines the execution of the wire connection operation according to the adjusted parameters, and instructs the power supply control unit 31 to perform the wire connection operation. The automatic wire connection device 2 returns the sequence to step S2, and performs the wire connection operation according to the adjusted parameters. Thus, when the cutting of the wire electrode 11 is not satisfactory or when the automatic connection fails, the automatic wire connecting device 2 adjusts the parameters and retries the cutting and connecting operation of the wire electrode 11.
Here, the adjustment of the parameters by the parameter adjustment unit 43 will be described. When the wire electrode 11 fails to be cut, an excessively large cutting current and an excessively small tension during cutting are considered as main causes of the failure. The parameter adjusting unit 43 adjusts the cutting current parameter to be small or the cutting tension parameter to be large when the cutting of the wire electrode 11 is not satisfactory.
When the wire electrode 11 is cut successfully and the wire connection fails, there is no problem at the tip of the wire electrode 11, but the straightness of the wire electrode 11 after the annealing treatment is considered to be insufficient. That is, it is considered that there is a problem in the annealing treatment. The parameter adjusting unit 43 adjusts at least one of the annealing current parameter and the annealing tension parameter. The parameter adjusting unit 43 may adjust the annealing current parameter or the annealing tension parameter, and may adjust the annealing time to be longer or the annealing time to be shorter.
The parameter adjusting unit 43 can obtain a difference between the detected value of the interrupting current and a reference value of the interrupting current, and adjust the interrupting current parameter so that the value of the interrupting current converges in a range including the reference value. The parameter adjusting unit 43 can obtain a difference between the value of the tension detected at the time of cutting and a reference value of the cutting tension, and adjust the cutting tension parameter so that the value of the cutting tension falls within a range including the reference value. The parameter adjusting unit 43 may calculate a difference between the detected value of the annealing current and a reference value of the annealing current, and adjust the annealing current parameter so that the value of the annealing current converges in a range including the reference value. The parameter adjusting unit 43 can obtain a difference between the value of the tension detected during the annealing process and a reference value of the annealing tension, and adjust the breaking tension parameter so that the value of the annealing tension falls within a range including the reference value. The reference value and the range including the reference value are set in advance in the automatic wire connecting device 2 based on a result obtained by an experiment for cutting the wire electrode 11 or a result obtained by simulating cutting of the wire electrode 11. The set reference value and information of the range including the reference value are stored in the storage unit of the automatic wire connecting device 2. The illustration of the storage unit is omitted.
Reference values associated with the line information may be set for each of the reference values of the cutting current, the cutting tension, the annealing current, and the annealing tension. The parameter adjusting unit 43 reads out, from the storage unit, a reference value associated with the line information and information of a range including the reference value, based on the line information input from the line information input unit 41. Thus, the parameter adjusting unit 43 adjusts the parameter using the reference value associated with the line information and the information of the range associated with the line information. As described above, the parameter adjusting section 43 adjusts the parameter based on the line information input from the line information input section 41.
According to embodiment 2, the automatic wire connection device 2 retries cutting and connection of the wire electrode 11 by adjusting the parameters based on the result of the acceptance/rejection determination regarding cutting and whether or not automatic connection has succeeded. Thus, the automatic wire connection device 2 can adjust the set parameters when the parameters are not appropriate parameters, and can perform the cutting and connection operations of the wire electrode 11 again. Further, the automatic wire connection device 2 adjusts the parameters based on the wire information, thereby enabling parameter adjustment suitable for the type of the wire electrode 11 for each type of the wire electrode 11.
Embodiment 3.
Fig. 6 is a diagram showing an automatic wire connecting device in the wire electric discharge machine according to embodiment 3. In embodiment 3, the parameter adjusting unit 51 provided in the automatic wire connecting unit 50 of the online automatic wire connecting device 3 learns the parameters using the trained model. In embodiment 3, the same components as those in embodiment 1 or 2 are denoted by the same reference numerals, and a description will be given mainly of a configuration different from that in embodiment 1 or 2.
The parameter adjusting unit 51 includes: a learning device 52 that learns parameters that can be automatically wired; an inference device 53 that infers a parameter that can be automatically wired; and a model storage unit 54 that stores the trained models. The learning device 52 generates a trained model for inferring parameters that can be automatically wired. The learning device 52 generates a trained model by machine learning. The inference means 53 infers the parameters using the trained model generated by the learning means 52.
The line information input unit 41 outputs the input line information to the parameter adjustment unit 51. The connection detecting unit 42 outputs success/failure information to the parameter adjusting unit 51. The success information is information indicating whether the automatic wiring is successful. The wire connection executing unit 35 outputs the determination information input from the determining unit 34 to the parameter adjusting unit 51. The determination information is information indicating the result of the acceptance determination by the determination unit 34. The parameter adjustment unit 51 adjusts the parameter based on the line information, success/failure information, and determination information.
Next, the operation of automatic wire connection performed by the wire automatic wiring device 3 will be described. Fig. 7 is a flowchart showing an operation procedure of the automatic wire connecting device according to embodiment 3. Steps S1 to S6 shown in fig. 7 are the same as steps S1 to S6 shown in fig. 5. In addition, when the cut state does not satisfy the criterion for the determination of pass (No at step S4) or when the wire connection fails (No at step S6), the automatic wire connecting device 3 proceeds to step S9 described later in the sequence. If the wire connection is successful (Yes at step S6), the automatic wire connecting device 3 advances the sequence to step S8 described below.
In step S8, the automatic wire connecting device 3 acquires the wire information, the determination information, the success/failure information, and the parameter in the learning device 52. The learning device 52 learns the parameters using a data set including line information, determination information, success/failure information, and parameters. If the learning device 52 performs learning, the automatic wire connecting device 3 ends the operation according to the sequence shown in fig. 7.
In step S9, the automatic wire connecting device 3 acquires the wire information, the determination information, the success/failure information, and the parameter in the learning device 52. The learning device 52 learns the parameters using a data set including line information, determination information, success/failure information, and parameters. Next, the automatic wire connection device 3 estimates a parameter that can be automatically connected in the estimation device 53. In step S10, the automatic wire connecting device 3 outputs the parameter as the estimation result from the estimation device 53 to the parameter setting unit 32. If the parameter is output from the inference device 53 by step S10, the automatic wire connection device 3 returns the sequence to step S2.
Here, the processing in the parameter adjusting unit 51 will be described. Fig. 8 is a block diagram showing a functional configuration of a learning device included in the automatic wire connecting device according to embodiment 3. The learning device 52 includes a data acquisition unit 55 and a model generation unit 56.
The data acquisition unit 55 acquires the line information, the judgment information, and the success/failure information input to the parameter adjustment unit 51. The data acquisition unit 55 reads the parameters from the parameter setting unit 32 to acquire the set parameters. The data acquisition unit 55 creates a data set in which the line information, the determination information, the success/failure information, and the parameter are collected. The data acquisition unit 55 outputs the created data set to the model generation unit 56. The model generation unit 56 generates a trained model using a data set created based on the line information, the determination information, the success/failure information, and the parameters.
The learning algorithm used by the model generation unit 56 may be any algorithm. As an example, a case where Reinforcement Learning (Reinforcement Learning) is applied will be described. Reinforcement learning refers to an agent in a certain environment, i.e., an action agent, observing the current state and determining an action to be taken. The agent learns the countermeasure that is most rewarded by a series of actions, while receiving the return from the environment by selecting the action. As typical reinforcement Learning methods, Q-Learning (Q-Learning), TD-Learning (TD-Learning), and the like are known. For example, in the case of Q learning, an action value table, which is a general update expression of the action value function Q (s, a), is expressed by the following expression (1). The action value function Q (s, a) represents an action value Q, which is the value of an action for selecting the action "a" based on the environment "s".
[ formula 1 ]
Q(s t ，a t )←Q(s t ，a t )+α(r t+1 +γmax a Q(s t+1 ，a t )-Q(s t .a t ))…(1)
In the above formula (1), "s t "indicates the state of the environment at time" t ". "a" is t "represents an action at time" t ". By action "a t ", status from" s t "to" s t+1 "change. ' r t+1 "represents a status from" s t "to" s t+1 "reward by change. "γ" represents the discount rate, satisfying 0 < γ ≦ 1."α" represents a learning coefficient, and satisfies 0 < α ≦ 1. In embodiment 3, the action "a t "is line information and parameters. State "s t "is the determination information and the success/failure information. Model generatorState "s" of forming portion 56 to time "t t "best action in" a t "to learn.
The update formula represented by the above formula (1) is such that if the action value of the best action "a" at time "t +1" is greater than the action value Q of the action "a" executed at time "t", the action value Q is increased, and conversely, the action value Q is decreased. In other words, the action merit function Q (s, a) is updated so that the action merit Q of the action "a" at the time "t" approaches the best action merit at the time "t + 1". Thus, the best action value in a certain environment is continuously propagated to the action values in the previous environments.
The model generation unit 56 includes a reward calculation unit 57 and a function update unit 58. The reward calculation unit 57 calculates a reward corresponding to a combination of the wire information and the parameter used for automatic wire connection, based on the determination information and the success/failure information. The function update unit 58 updates the function for determining the parameter according to the report calculated by the report calculation unit 57. The function updating unit 58 outputs the trained model created by updating the function to the model storage unit 54.
The reward calculation unit 57 calculates a reward "r" corresponding to a combination of the wire information and the parameter used for automatic wire connection, based on the determination information and the success/failure information. For example, when the determination information is "pass" and the success information is "success", the reward calculation unit 57 gives "+2" which is a value of the reward, and increases the reward "r". When the determination information is "pass" and the success/failure information is "fail", the reward calculation unit 57 gives a value of "1" as the reward and decreases the reward "r". When the determination information is "failure", the reward calculation unit 57 gives a value of "2" to the reward and decreases the reward "r". In addition, the value of the reward is arbitrary.
Fig. 9 is a flowchart showing a processing procedure of the learning device in embodiment 3. A reinforcement learning method for updating the action cost function Q (s, a) will be described with reference to the flowchart of fig. 9.
In step S11, the learning device 52 acquires line information, determination information, success/failure information, and parameters. In step S12, the learning device 52 calculates a reward corresponding to a combination of the wire information and the parameter used for automatic wire connection based on the determination information and the success/failure information. In step S13, the learning device 52 updates the action cost function Q (S, a) based on the returns. In step S14, the learning device 52 determines whether or not the action merit function Q (S, a) converges. The learning device 52 determines that the action merit function Q (S, a) converges because the update of the action merit function Q (S, a) in step S13 is not performed.
If it is determined that the action merit function Q (S, a) does not converge (No at step S14), the learning device 52 returns the operation sequence to step S11. When it is determined that the action cost function Q (S, a) converges (Yes at step S14), the learning device 52 ends the learning of the procedure shown in fig. 9. Note that the learning device 52 may continue the learning by returning the operation procedure to step S13 to step S11 without performing the determination in step S14. The model storage unit 54 stores the generated action cost function Q (s, a) as a trained model.
Fig. 10 is a block diagram showing a functional configuration of an estimation device included in the automatic wire connecting device according to embodiment 3. The inference means 53 infers the parameters capable of automatic wiring based on the trained model and the wire information. The estimation device 53 includes a data acquisition unit 59 and an estimation unit 60.
The data acquisition unit 59 acquires the line information input to the parameter adjustment unit 51. The data acquisition unit 59 outputs the acquired line information to the estimation unit 60. The estimation unit 60 estimates parameters that can be automatically connected using the trained model read from the model storage unit 54. The inference unit 60 inputs information to the trained model, and thereby can infer parameters that can make the automatic wiring successful.
Fig. 11 is a flowchart showing a processing procedure of the estimation device in embodiment 3. In step S15, the estimation device 53 acquires line information in the data acquisition unit 59. In step S16, the estimation device 53 inputs line information to the trained model in the estimation unit 60 to obtain a parameter. In step S17, the estimation device 53 outputs the parameter from the estimation unit 60 to the parameter setting unit 32. Thus, the estimation device 53 ends the processing according to the procedure shown in fig. 11.
In embodiment 3, the case where reinforcement learning is applied to the learning algorithm used by the learning device 52 has been described, but learning other than reinforcement learning may be used for the learning algorithm. Learning device 52 may perform machine Learning using known Learning algorithms other than reinforcement Learning, such as Deep Learning (Deep Learning), neural networks, genetic programming, functional logic programming, or support vector machines.
In embodiment 3, the learning device 52 is incorporated in the automatic wire adjustment unit 50. The learning device 52 is not limited to a device included in the automatic wire connecting device 3, and may be a device external to the automatic wire connecting device 3. The learning device 52 may be a device that can be connected to the line automatic wiring device 3 via a network. The learning device 52 may be a device existing on a cloud server.
The learning device 52 may learn the parameters in accordance with the data set created for the plurality of line automatic wiring devices 3. The learning device 52 may acquire data sets from a plurality of automatic wire connection devices 3 used at the same site, or may acquire data sets from a plurality of automatic wire connection devices 3 used at different sites. The data set may be a data set collected from a plurality of wire automatic wiring devices 3 operating independently of each other at a plurality of sites. After the collection of data sets from the plurality of automatic line wiring devices 3 is started, a new automatic line wiring device 3 may be added to the object of the collection of data sets. In addition, after the collection of the data sets from the plurality of automatic wire wiring devices 3 is started, a part of the plurality of automatic wire wiring devices 3 may be excluded from the object of collecting the data sets.
The learning device 52 that has learned about one of the 1 automatic wire connection devices 3 may perform learning about the other automatic wire connection devices 3 than the automatic wire connection device 3. The learning device 52 that performs learning about the other automatic wire connection device 3 can update the output prediction model by relearning in the other automatic wire connection device 3.
According to embodiment 3, the automatic wire connection device 3 adjusts parameters using a trained model for estimating parameters that can be automatically connected. The automatic wire connection device 3 can make automatic wire connection successful by parameter adjustment based on the trained model.
Next, the hardware configuration of the automatic wire adjustment units 30, 40, and 50 according to embodiments 1 to 3 will be described. Fig. 12 is a diagram showing an example of a hardware configuration of the automatic wire adjustment unit according to embodiments 1 to 3. Fig. 12 shows a hardware configuration in a case where the functions of the automatic wire adjustment units 30, 40, and 50 are realized by using hardware for executing a program.
The automatic wire adjustment units 30, 40, and 50 include: a processor 61 that executes various processes; a memory 62 as a built-in memory; a storage device 63 that stores information; and an interface circuit 64 for inputting information to the automatic wire adjustment units 30, 40, 50 and outputting information from the automatic wire adjustment units 30, 40, 50.
The processor 61 is a CPU (Central Processing Unit). The Processor 61 may be a processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). The Memory 62 is a RAM (Random Access Memory), a ROM (Read Only Memory), a flash Memory, an EPROM (Erasable Programmable Read Only Memory), or an EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory).
The storage 63 is an HDD (Hard Disk Drive) or SSD (Solid State Drive). A program for causing the computer to function as the automatic wire adjustment unit 30, 40, 50 is stored in the storage device 63. The processor 61 reads a program stored in the storage device 63 into the memory 62 and executes the program.
The program may be stored in a storage medium readable by a computer system. The automatic wire adjustment unit 30, 40, 50 may store a program recorded in a storage medium in the memory 62. The storage medium may be a floppy disk, i.e., a removable storage medium, or a semiconductor memory, i.e., a flash memory. The program may be installed to the computer system from another computer or a server apparatus via a communication network.
The functions of the power supply control unit 31, the parameter setting unit 32, the cut-off state detection unit 33, the determination unit 34, the wire connection execution unit 35, the wire connection detection unit 42, the parameter adjustment unit 43, the learning device 52, and the estimation device 53 are realized by a combination of the processor 61 and software. The functions may be realized by a combination of the processor 61 and firmware, or may be realized by a combination of the processor 61, software, and firmware. The software or firmware is described as a program and stored in the storage device 63. The functions of the storage units of the automatic wire adjustment units 30, 40, and 50 and the model storage unit 54 are realized by using the storage device 63.
The interface circuit 64 receives a signal from an external device connected to the hardware. The external device includes a sensor for detecting a switching current, a sensor for detecting an annealing current, a sensor for detecting tension of the wire electrode 11, and a camera 22. The function of the line information input section 41 is realized by using the interface circuit 64.
The configurations described in the above embodiments illustrate an example of the contents of the present invention. The configurations of the respective embodiments can be combined with other known techniques. The structures of the respective embodiments may be combined with each other as appropriate. A part of the structure of each embodiment may be omitted or modified within a range not departing from the gist of the present invention.
Description of the reference numerals
1. 2, 3 automatic wire connecting device, 10 bobbin, 11 wire electrode, 11a ball, 12a, 12b pulley, 13 supply roller, 14a, 14b, 23 pinch roller, 15a, 15b power supply, 16a upper guide, 16b lower guide, 17 processed object, 18 guide roller, 19 wire recovery section, 20 annealing process section, 21 cutting section, 22 camera, 24a, 24b, 25 electrode, 30, 40, 50 automatic wire connecting adjustment section, 31 power supply control section, 32 parameter setting section, 33 cutting state detection section, 34 determination section, 35 wire connecting execution section, 36 tension detection section, 37 annealing current detection section, 38 cutting current detection section, 39 image acquisition section, 41 wire information input section, 42 wire connection detection section, 43, 51 parameter adjustment section, 52 learning device, 53 inference device, 54 model storage section, 55, 59 data acquisition section, 56 model generation section, 57 calculation section, 58 function update section, 60 inference section, 61 processor, 62 memory, 63 memory device, 64 interface circuit.
Claims (15)
1. An automatic wire connection device for automatically connecting a wire electrode in a wire electric discharge machine,
the automatic wire connecting device is characterized by comprising:
a cutting state detection unit that detects a cutting state when the wire electrode is cut;
a determination unit that determines whether or not the wire electrode is cut based on the cutting state; and
and a wire connection execution unit that determines execution of a wire connection operation based on a result of the pass/fail determination.
2. The automatic wire connecting device according to claim 1,
applying tension to the wire electrode when the wire electrode is cut,
the state of the tension is included in the cut-off state.
3. The automatic wire connecting device according to claim 1 or 2,
applying an annealing treatment to the wire electrode by flowing a current to the wire electrode,
the cut-off state includes a state of an annealing current that is a current flowing through the wire electrode during the annealing treatment.
4. The automatic wire connecting device according to any one of claims 1 to 3,
the wire electrode is fused by flowing a current to the wire electrode,
the cutting state includes a state of a cutting current, which is a current flowing through the wire electrode during the fusing of the wire electrode.
5. The automatic wire connecting device according to any one of claims 1 to 4,
the cutting state includes a shape of a portion to be cut out of the wire electrode.
6. The automatic wire connecting device according to any one of claims 1 to 5,
the cutting state includes a light emission state when the wire electrode is cut.
7. The automatic wire connecting device according to any one of claims 1 to 6,
the wire cutting device is provided with a parameter adjusting unit that adjusts a parameter set for cutting the wire electrode based on the result of the non-defective determination.
8. The automatic wire connecting device according to claim 7,
the wire connection executing unit determines execution of the wire connection operation according to the parameter adjusted by the parameter adjusting unit.
9. The automatic wire connecting device according to claim 7 or 8,
the parameters include at least 1 of a parameter indicating an annealing current flowing to the wire electrode to perform annealing treatment on the wire electrode, a parameter indicating a cutting current flowing to the wire electrode to cut the wire electrode, and a parameter indicating a tension applied to the wire electrode when the wire electrode is cut.
10. The automatic wire connecting device according to any one of claims 7 to 9,
the parameter adjusting unit adjusts the parameter based on the result of the determination of the presence or absence of the pass and whether the automatic wire connection is successful.
11. The automatic wire connecting device according to claim 10,
the parameter adjustment unit further adjusts the parameter based on line information that is information on a material of the wire electrode and a thickness of the wire electrode.
12. The automatic wire connecting device according to claim 11,
the parameter adjusting unit includes a learning device that generates a trained model for estimating the parameter that enables the automatic wire connection.
13. The automatic wire connecting device according to claim 12,
the learning device has:
a data acquisition unit that acquires the wire information, information indicating a result of the determination of the pass or fail, information indicating whether or not the automatic wire connection has succeeded, and the parameter; and
and a model generation unit that generates the trained model using a data set created based on the line information, information indicating a result of the determination of pass or fail, information indicating whether or not the automatic wire connection is successful, and the parameter.
14. The automatic wire connecting device according to claim 12 or 13,
the parameter adjustment unit includes an estimation device that estimates the parameter capable of performing the automatic wire connection based on the trained model and the wire information.
15. A wire electric discharge machine is characterized in that,
automatic wire connecting device according to one of claims 1 to 14.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/026229 WO2022003961A1 (en) | 2020-07-03 | 2020-07-03 | Automatic wire connection device and wire electrical discharge machine |
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| CN115243818A true CN115243818A (en) | 2022-10-25 |
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| JP (1) | JP6847335B1 (en) |
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| JPS58132420A (en) * | 1982-01-29 | 1983-08-06 | Sodeitsuku:Kk | Wire cutting method and device of wire cut discharge processing machine |
| JPH09108950A (en) * | 1995-10-11 | 1997-04-28 | Sodick Co Ltd | Wire electrode inserting method of wire cut electric discharge machining device |
| CN103170691A (en) * | 2011-12-22 | 2013-06-26 | 发那科株式会社 | Wire electric discharge machining apparatus having function of automatically selecting automatic wire connecting parameter |
| CN104070251A (en) * | 2013-03-29 | 2014-10-01 | 发那科株式会社 | Wire electric discharge machine with automatic wire connecting function |
| CN105689825A (en) * | 2014-12-09 | 2016-06-22 | 发那科株式会社 | Wire electric discharge machine controller having wire electrode replacement function |
| CN106363261A (en) * | 2015-07-21 | 2017-02-01 | 发那科株式会社 | Wire electric discharge machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS62152617A (en) * | 1985-12-27 | 1987-07-07 | Fanuc Ltd | Method of wire-cut electric discharge machining |
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2020
- 2020-07-03 WO PCT/JP2020/026229 patent/WO2022003961A1/en active Application Filing
- 2020-07-03 CN CN202080098156.1A patent/CN115243818B/en active Active
- 2020-07-03 JP JP2020565511A patent/JP6847335B1/en active Active
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| JPS58132420A (en) * | 1982-01-29 | 1983-08-06 | Sodeitsuku:Kk | Wire cutting method and device of wire cut discharge processing machine |
| JPH09108950A (en) * | 1995-10-11 | 1997-04-28 | Sodick Co Ltd | Wire electrode inserting method of wire cut electric discharge machining device |
| CN103170691A (en) * | 2011-12-22 | 2013-06-26 | 发那科株式会社 | Wire electric discharge machining apparatus having function of automatically selecting automatic wire connecting parameter |
| CN104070251A (en) * | 2013-03-29 | 2014-10-01 | 发那科株式会社 | Wire electric discharge machine with automatic wire connecting function |
| CN105689825A (en) * | 2014-12-09 | 2016-06-22 | 发那科株式会社 | Wire electric discharge machine controller having wire electrode replacement function |
| CN106363261A (en) * | 2015-07-21 | 2017-02-01 | 发那科株式会社 | Wire electric discharge machine |
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| CN115243818B (en) | 2023-09-29 |
| JPWO2022003961A1 (en) | 2022-01-06 |
| JP6847335B1 (en) | 2021-03-24 |
| WO2022003961A1 (en) | 2022-01-06 |
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