WO2013005315A1 - ワイヤ放電加工装置 - Google Patents
ワイヤ放電加工装置 Download PDFInfo
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- WO2013005315A1 WO2013005315A1 PCT/JP2011/065473 JP2011065473W WO2013005315A1 WO 2013005315 A1 WO2013005315 A1 WO 2013005315A1 JP 2011065473 W JP2011065473 W JP 2011065473W WO 2013005315 A1 WO2013005315 A1 WO 2013005315A1
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- speed
- wire
- disconnection detection
- wire electrode
- disconnection
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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
- B23H7/104—Wire tension control
-
- 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
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
Definitions
- the present invention relates to a wire electric discharge machining apparatus.
- the wire electric discharge machining apparatus adjusts the machining conditions so as to increase the machining energy in order to improve the machining speed.
- the wire electrode is likely to be disconnected.
- wire breakage may be easily caused by aging of elements of the wire traveling system.
- it is easy to break the wire when processing a shape that is likely to be unstable. If the machining power supply or wire travel does not stop immediately after the wire breaks, it is dangerous to generate a discharge at a place other than the workpiece. Therefore, it is necessary to install a wire breakage detection device in the wire electrical discharge machine. Become.
- a wire breakage detection apparatus there is a system that detects a wire breakage from a difference in rotational speed of rotating elements on a wire travel path (see, for example, Patent Document 1).
- the wire supply bobbin around which the wire electrode is wound, the tension roller that tensions the wire electrode fed out from the bobbin, the recovery roller that recovers the wire electrode at a predetermined speed, and the travel of the wire electrode The rotational speed of any two of the guide pulleys that perform stabilization or change of the traveling direction is detected, and if the difference between the rotational speeds exceeds a predetermined value, a disconnection is detected.
- the wire electrical discharge machining apparatus may be implemented with control for reducing fluctuations in the rotational speed of the tension motor and control for reducing the speed difference between the tension roller and the collection roller.
- control for reducing fluctuations in the rotational speed of the tension motor
- control for reducing the speed difference between the tension roller and the collection roller.
- the present invention has been made in view of the above, and an object of the present invention is to obtain a wire electric discharge machining apparatus capable of detecting wire breakage as quickly as possible.
- the present invention provides a recovery roller that recovers a wire electrode, a recovery motor that drives the recovery roller to run the wire electrode at a predetermined speed, and the recovery A tension roller that applies tension to the wire electrode with the roller, a tension motor that drives the tension roller, a speed calculation unit that calculates a rotation speed of the tension motor, and a rotation output from the speed calculation unit A speed fluctuation compensator that generates a speed compensation value that suppresses fluctuations in the rotational speed of the tension motor based on the speed, and a comparison between a preset disconnection detection threshold and the speed compensation value output from the speed fluctuation compensator And a disconnection detector for detecting disconnection of the wire electrode based on the above.
- the wire electric discharge machining apparatus detects the wire breakage as quickly as possible because the wire breakage is detected based on the speed compensation value that suppresses the speed fluctuation of the tension motor generated simultaneously with the wire breakage. There is an effect that can be done.
- FIG. 1 is a diagram showing the configuration of the wire electric discharge machining apparatus according to the first embodiment.
- FIG. 2 is a diagram showing the rotation speed of the tension motor before and after the wire breakage.
- FIG. 3 is a diagram showing a speed fluctuation suppression command output by the speed fluctuation compensator before and after the wire breakage.
- FIG. 4 is a diagram for explaining the disconnection detection threshold.
- FIG. 5 is a flowchart for explaining the operation of the disconnection detection apparatus according to the first embodiment.
- FIG. 6 is a diagram illustrating a configuration of the wire electric discharge machining apparatus according to the second embodiment.
- FIG. 7 is a flowchart for explaining the operation of the comparator according to the second embodiment.
- FIG. 8 is a flowchart for explaining the operation of the disconnection detection apparatus according to the second embodiment.
- FIG. 9 is a diagram illustrating a configuration of the wire electric discharge machining apparatus according to the third embodiment.
- FIG. 10 is a flowchart for explaining the operation of the disconnection detection apparatus according to the third embodiment.
- FIG. 11 is a diagram illustrating a configuration of the wire electric discharge machining apparatus according to the fourth embodiment.
- FIG. 12 is a diagram showing a speed fluctuation suppression command when the wire electrode slips.
- FIG. 13 is a flowchart for explaining the operation of the slip detection apparatus according to the fourth embodiment.
- FIG. 1 is a diagram illustrating a configuration of a wire electric discharge machining apparatus according to a first embodiment of the present invention.
- the wire electric discharge machining apparatus according to the first embodiment includes a wire electrode 1, a wire bobbin 3 that supplies the wire electrode 1, and wire guide rollers 4, 5, 6, 7, disposed on a path along which the wire electrode 1 travels.
- recovery rollers 11 a and 11 b that recover the wire electrode 1 at a predetermined speed
- a recovery motor 12 that drives the recovery roller 11 a
- a speed controller 15 that controls the rotational speed of the recovery motor 12
- the wire electrode 1 A tension roller 9 that stretches tension, pinch rollers 8a and 8b that press the wire electrode 1 against the tension roller 9, a tension motor 13 that drives the tension roller 9, an encoder 14 attached to the tension motor 13, and a tension motor 13 and a host controller 17 that controls the speed controller 15 and the motor controller 16 at the host.
- the wire electric discharge machining apparatus includes a speed calculation device 18 that calculates a rotation speed from a signal of an encoder 14 attached to the tension motor 13, and a speed compensation value that suppresses fluctuations in the rotation speed of the tension motor 13.
- Speed fluctuation compensator 19 for generating a speed fluctuation suppression command
- a breakage detection threshold storage section 20 for storing a set value of a breakage detection threshold, and a breakage detection threshold and speed fluctuation compensation stored in the breakage detection threshold storage section 20
- a disconnection detecting device 21 that detects disconnection of the wire electrode 1 using a speed fluctuation suppression command output from the container 19.
- wire breakage the principle of detecting the wire electrode 1 breakage (hereinafter, wire breakage) in the wire electric discharge machining apparatus of the first embodiment will be described below.
- control for suppressing fluctuations in tension of the wire electrode 1 may be used to improve the quality of the machined surface.
- control for reducing fluctuations in the rotation speed of the tension motor 13 control for reducing the difference between the rotation speed of the collection roller 11a and the rotation speed of the tension roller 9, and the difference between the rotation speed command of the collection roller 11a and the rotation speed of the tension roller 9.
- the tension motor 13 works to maintain the rotational speed before the wire breakage even after the wire breakage, so that there is no speed difference between the two rotating elements on the wire travel path. There is a problem that the disconnection cannot be detected, or it takes a long time until the rotational speed difference occurs, and the detection of the wire disconnection is delayed.
- FIG. 2 is a diagram showing the rotational speed of the tension motor 13 before and after the wire breakage
- FIG. 3 is a diagram showing a speed fluctuation suppression command output by the speed fluctuation compensator 19 before and after the wire breakage. 2 and 3, the rotation direction of the tension roller 9 during wire travel is positive.
- the wire electrode 1 being processed is recovered at a constant speed by the recovery motor 12 in a state where the tension is applied between the tension roller 9 and the recovery rollers 11a and 11b.
- the rotational speed of the tension motor 13 is as shown in FIG. (1).
- the speed fluctuation suppression command is a command with an average value of 0 that suppresses the AC component of the tension motor rotation speed, and is (1) in FIG.
- the wire electrode 1 on the recovery roller 11a side from the disconnection point is recovered at a constant speed by the recovery rollers 11a and 11b, whereas the wire electrode 1 on the tension roller 9 side from the disconnection point is the recovery roller. It is not recovered from 11a, 11b.
- the speed fluctuation compensator 19 since the speed fluctuation compensator 19 tries to maintain the rotational speed of the tension motor 13 before the wire breakage, the speed fluctuation suppression command generates a command whose average value is a positive value as shown in (2) of FIG. Subsequently, the tension motor does not decelerate immediately after the disconnection as shown in FIG. Thus, while the average value of the speed fluctuation suppression command before the wire breakage is 0, the speed fluctuation suppression command after the wire breakage continues to be a positive value. Disconnection detection is possible.
- the wire electrode 1 is fed out so as to face the workpiece 2 while being controlled to a predetermined tension and traveling speed. At this time, a pulse voltage is applied to the wire electrode 1 from a machining power source (not shown), and the wire electrical discharge machining device is discharged by appropriately controlling the relative distance between the wire electrode 1 and the workpiece 2 by a driving device (not shown). Processing.
- the traveling speed and tension of the wire electrode 1 are controlled as follows.
- the wire electrode 1 passes through the wire guide rollers 4, 5, 6, 7, and 10 from the wire bobbin 3 and is recovered by the recovery rollers 11a and 11b.
- the collection rollers 11 a and 11 b are driven by a collection motor 12.
- the traveling speed of the wire electrode 1 is determined by the processing conditions, and a wire traveling speed command is sent from the host controller 17 to the speed controller 15, and the speed controller 15 determines that the traveling speed of the wire electrode 1 is based on the wire traveling speed command.
- the speed of the collection motor 12 is controlled so as to achieve the commanded traveling speed.
- the wire electrode 1 is pressed by the pinch rollers 8 a and 8 b so as not to slip between the tension roller 9, and the torque generated by the tension motor 13 is transmitted to the wire electrode 1 via the tension roller 9.
- the tension of the wire electrode 1 is determined by the processing conditions.
- a wire tension command is sent from the host controller 17 to the motor controller 16, and the motor controller 16 controls the torque of the tension motor 13 so as to obtain a predetermined tension. .
- an encoder 14 is attached to the tension motor 13.
- the output of the encoder 14 is used to suppress fluctuations in the rotational speed of the tension motor as follows.
- the speed calculation device 18 calculates the rotational speed of the tension motor from the output of the encoder 14 and sends it to the speed fluctuation compensator 19.
- the speed fluctuation compensator 19 extracts a speed fluctuation (AC component) by high-pass filtering the rotational speed of the tension motor, generates a control command for suppressing this speed fluctuation, and sends it to the motor controller 16.
- AC component speed fluctuation
- the cutoff frequency of the high-pass filter is sufficiently lower than the frequency component of the speed fluctuation to be suppressed.
- the motor controller 16 compensates the torque so as to suppress speed fluctuations.
- the speed fluctuation compensator 19 also sends a speed fluctuation suppression command to the disconnection detection device 21.
- the disconnection detection threshold storage unit 20 stores a value larger than the speed fluctuation suppression command before the wire disconnection and smaller than the speed fluctuation suppression command after the wire disconnection as the disconnection detection threshold.
- the disconnection detection device 21 compares the speed fluctuation suppression command sent from the speed fluctuation compensator 19 with the disconnection detection threshold stored in the disconnection detection threshold storage unit 20, and detects wire disconnection based on the comparison result. .
- FIG. 5 is a flowchart for explaining the operation of the disconnection detection device 21.
- the disconnection detection device 21 determines whether or not the speed fluctuation suppression command is greater than the disconnection detection threshold (step S1). When the speed variation suppression command is smaller than the disconnection detection threshold (No at Step S1), the disconnection detection device 21 repeats the determination process at Step S1 again. When the speed fluctuation suppression command is larger than the disconnection detection threshold (Yes in step S1), the disconnection detection device 21 determines that a wire disconnection has occurred, and sends a disconnection detection signal to the host controller 17 (step S2).
- the host controller 17 sends a command to stop the rotation of the tension motor to the motor controller 16 when the disconnection detection signal is received. Also, a command to stop the oscillation of the discharge pulse is sent to a machining power source (not shown).
- speed fluctuation compensation that generates a speed fluctuation suppression command as a speed compensation value that suppresses fluctuations in the rotation speed of the tension motor 13 based on the rotation speed of the tension motor 13.
- a disconnection detection device 21 that detects disconnection of the wire electrode 1 based on a comparison between a preset disconnection detection threshold and a speed fluctuation suppression command output from the speed fluctuation compensator 19. Therefore, since the wire breakage is detected based on the speed fluctuation suppression command that suppresses the speed fluctuation of the tension motor 13 generated simultaneously with the wire breakage, the rotation speed of the tension motor 13 and the rotation speed of the recovery motor 12 are detected.
- the wire breakage can be detected more quickly. That is, the wire breakage can be detected as quickly as possible.
- the speed fluctuation suppression command is used for wire breakage detection, it is not necessary to provide a new sensor for wire breakage detection.
- FIG. FIG. 6 is a diagram illustrating a configuration of the wire electric discharge machining apparatus according to the second embodiment.
- the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the wire electric discharge machining apparatus includes a wire electrode 1, a wire bobbin 3, wire guide rollers 4, 5, 6, 7, and 10, pinch rollers 8a and 8b, and a tension roller. 9, the collection rollers 11a and 11b, the collection motor 12, the tension motor 13, the encoder 14, the speed controller 15, the motor controller 16, the host controller 17, the speed calculator 18, and the speed fluctuation.
- a compensator 19 a disconnection detection threshold storage unit 20, a disconnection detection device 21 a, a comparator 22, a disconnection detection counter 23, and a disconnection detection counter threshold storage unit 24 are provided.
- the wire electric discharge machining apparatus adds the comparator 22, the breakage detection counter 23, and the breakage detection counter threshold value storage unit 24 to the configuration of the first embodiment, and detects the breakage of the breakage detection apparatus 21. The processing is changed.
- the comparator 22, the disconnection detection counter 23, and the disconnection detection device 21a cooperate to measure the elapsed time when the speed fluctuation suppression command continuously exceeds the disconnection detection threshold.
- the wire electrode 1 functions as a disconnection detection unit that determines that the wire electrode 1 is disconnected.
- the comparator 22 compares the speed fluctuation suppression command sent from the speed fluctuation compensator 19 with the disconnection detection threshold value stored in the disconnection detection threshold value storage unit 20, and compares the speed fluctuation suppression command.
- the disconnection detection counter 23 is counted up.
- the speed fluctuation suppression command is smaller, the counter is cleared to zero.
- the disconnection detection device 21a determines whether or not the time during which the speed fluctuation suppression command continuously exceeds the disconnection detection threshold exceeds a preset elapsed time threshold, and based on the determination result. Wire breakage is detected.
- the elapsed time threshold value is given by the disconnection detection counter threshold value stored in the disconnection detection counter threshold value storage unit 24.
- the disconnection detection threshold and the disconnection detection counter threshold are set in advance as follows.
- the disconnection detection threshold value may be a value larger than zero and smaller than the speed fluctuation suppression command after the wire disconnection, and the range of valid values as the disconnection detection threshold value is wider than that in the first embodiment.
- the disconnection detection counter value for example, when the wire detection is performed with the disconnection detection threshold value set to zero, the disconnection detection counter threshold value is set so as not to detect erroneous disconnection. Further, the disconnection detection counter threshold value may be set so that the disconnection is not erroneously detected even if an instantaneous disturbance is given to the wire electrode.
- FIG. 7 is a flowchart for explaining the operation of the comparator 22
- FIG. 8 is a flowchart for explaining the operation of the disconnection detecting device 21a.
- the comparator 22 determines whether or not the speed fluctuation suppression command is larger than the disconnection detection threshold (step S ⁇ b> 11).
- the comparator 22 counts up the count value of the disconnection detection counter 23 (step S12), and the speed fluctuation suppression command is greater than the disconnection detection threshold. If it is smaller (step S11, No), the count value of the disconnection detection counter 23 is cleared (step S13). The comparator 22 proceeds to the process of step S11 after the process of step S12 or step S13.
- step S11 is performed for every predetermined
- the disconnection detection device 21a determines whether or not the count value of the disconnection detection counter 23 is larger than the disconnection detection counter threshold (step S21). When the counter value is smaller than the disconnection detection counter threshold (No at Step S21), the disconnection detection device 21a repeats the determination process at Step S21 again. When the counter value is larger than the disconnection detection counter threshold (step S21, Yes), the disconnection detection device 21a determines that a wire disconnection has occurred, and sends a disconnection detection signal to the host control device 17 (step S22).
- the time when the speed fluctuation suppression command exceeds the disconnection detection threshold is calculated by the counter, and the time for detecting the disconnection is also given by the counter value, but the disconnection detection threshold is exceeded.
- the means for calculating the remaining time is not limited to the counter, and the setting of the time for detecting disconnection is not limited to the method of giving the counter value.
- the disconnection detection unit (the comparator 22, the disconnection detection counter 23, and the disconnection detection device 21a) is in a state in which the speed fluctuation suppression command continuously exceeds the disconnection detection threshold. Since the wire electrode 1 is determined to be disconnected when the elapsed time is measured and the measured elapsed time is greater than a preset elapsed time threshold, no wire disconnection has occurred. Even if the speed fluctuation suppression command increases momentarily, it is possible to prevent erroneous detection of wire breakage.
- FIG. 9 is a diagram illustrating a configuration of the wire electric discharge machining apparatus according to the third embodiment.
- the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the wire electric discharge machining apparatus includes a wire electrode 1, a wire bobbin 3, wire guide rollers 4, 5, 6, 7, and 10, pinch rollers 8a and 8b, and a tension roller.
- a compensator 19, a disconnection detection threshold storage unit 20, a disconnection detection device 21 b, and an averaging processing device 25 are provided.
- the configuration of the wire electrical discharge machining apparatus of the third embodiment is obtained by adding the averaging processing device 25 to the configuration of the first embodiment and changing the disconnection detection processing of the disconnection detection device 21.
- the averaging processing device 25 and the disconnection detection device 21b cooperate to average the speed fluctuation suppression command, and when the speed fluctuation suppression command after the averaging process is larger than the disconnection detection threshold, the wire It functions as a disconnection detector of the third embodiment that determines that the electrode 1 is disconnected.
- the averaging processing device 25 averages the speed fluctuation suppression command sent from the speed fluctuation compensator 19.
- the averaging process for example, a low-pass filter process, a moving average process, or the like is applied.
- the break frequency of the averaging process is set lower than the fluctuation frequency of the speed fluctuation suppression command during wire travel.
- the disconnection detection device 21 b detects a wire disconnection based on a comparison between the speed fluctuation suppression command averaged by the averaging processing device 25 and the disconnection detection threshold stored in the disconnection detection threshold storage unit 20.
- FIG. 10 is a flowchart for explaining the operation of the disconnection detection device 21b.
- the disconnection detection device 21b determines whether or not the speed fluctuation suppression command after the averaging process is greater than the disconnection detection threshold (step S31).
- the disconnection detection device 21b repeats the determination process at Step S31 again.
- the disconnection detection device 21b determines that a wire disconnection has occurred, and sends a disconnection detection signal to the host control device 17. (Step S32).
- the disconnection detection unit averages the speed fluctuation suppression command, and when the speed fluctuation suppression command after the averaging process is larger than the disconnection detection threshold, the wire electrode 1 Since it is determined that it is disconnected, as in the second embodiment, even if the speed fluctuation suppression command is instantaneously increased when no wire disconnection occurs, the wire disconnection is erroneously detected. Can be prevented.
- FIG. 11 is a diagram illustrating the configuration of the wire electric discharge machining apparatus according to the fourth embodiment.
- the same components as those in the second embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the wire electric discharge machining apparatus includes a wire electrode 1, a wire bobbin 3, wire guide rollers 4, 5, 6, 7, and 10, pinch rollers 8a and 8b, and a tension roller.
- a wire electrode 1 a wire bobbin 3, wire guide rollers 4, 5, 6, 7, and 10, pinch rollers 8a and 8b, and a tension roller.
- the compensator 19 the disconnection detection threshold storage unit 20, the disconnection detection device 21 a, the comparator 22, the disconnection detection counter 23, the disconnection detection counter threshold storage unit 24, and the slip detection device 26 are provided.
- the wire electric discharge machining apparatus of the fourth embodiment is obtained by adding the slip detection device 26 to the configuration of the second embodiment.
- the comparator 22, the disconnection detection counter 23, and the slip detection device 26 cooperate to measure the elapsed time when the speed fluctuation suppression command continuously exceeds the disconnection detection threshold.
- the speed fluctuation suppression command becomes equal to or less than the disconnection detection threshold without the elapsed time reaching the elapsed time threshold, it functions as a slip detection unit that determines that the wire electrode has slipped.
- the wire electrode 1 and the above-mentioned Slip may occur between the rotating elements.
- the tension fluctuation of the wire electrode 1 increases and the quality of the machined surface is lowered. Therefore, the rotating element of the wire travel system that deteriorates over time is often a maintenance part.
- the wire electrode 1 may slip due to forgetting to replace the maintenance parts, which may reduce the quality of the processed surface.
- the wire electrode may slip before the replacement period of the maintenance parts, which may reduce the quality of the processed surface.
- the speed fluctuation suppression command output from the speed fluctuation compensator 19 after the wire breakage continues to be a positive value.
- the speed fluctuation suppression command temporarily becomes a large positive value as shown in FIG. 12, but does not continue to be a positive value. Therefore, it is possible to determine whether or not the wire electrode is slipping by paying attention to the temporary increase in the speed fluctuation suppression command.
- an alarm is issued to prompt the operator to replace the maintenance part, thereby avoiding deterioration of the machined surface quality.
- the comparator 22 compares the speed fluctuation suppression command sent from the speed fluctuation compensator 19 with the disconnection detection threshold stored in the disconnection detection threshold storage unit 20, and when the speed fluctuation suppression command is larger. Counts up the disconnection detection counter 23 and clears the counter to 0 when the speed fluctuation suppression command is smaller.
- the slip detection device 26 monitors the count value of the disconnection detection counter 23 and the disconnection detection signal transmitted from the disconnection detection device 21a. After the disconnection detection counter 23 counts up, the disconnection detection counter threshold value storage unit 24 is monitored. If the counter value is cleared to 0 before reaching the set counter value, it is determined that the wire electrode 1 has slipped, and a slip detection signal is sent to the host controller 17. When the host controller 17 receives the slip detection signal, for example, an alarm notifying that the wire electrode is slipping is issued from a display of the host controller 17 (not shown) to prompt the operator to replace the maintenance part.
- FIG. 13 is a flowchart for explaining the operation of the slip detection device 26.
- the slip detection device 26 determines whether or not the count value of the disconnection detection counter 23 is a zero value (step S41). When the counter value is zero (step S41, Yes), the slip detection device 26 executes the determination process of step S41 again. When the counter value is not zero (step S41, No), that is, the counter value If the value is 1 or more, it is further determined whether or not a disconnection detection signal has been received (step S42). If the slip detection device 26 has received the disconnection detection signal (step S42, Yes), the operation ends.
- step S42 determines whether or not the count value of the disconnection detection counter 23 is again zero (step S43). If the counter value is zero (step S43, Yes), the slip detection device 26 sends a slip detection signal to the host control device 17 (step S44). When the counter value is not zero (step S43, No), the slip detection device 26 proceeds to the process of step S42.
- the elapsed time when the speed fluctuation suppression command continuously exceeds the disconnection detection threshold is measured, and the measured elapsed time is reached without reaching the elapsed time threshold.
- the fluctuation suppression command is equal to or less than the disconnection detection threshold, it is configured to further include a slip detection unit that determines that the slip of the wire electrode has occurred, so that wire disconnection can be detected as quickly as possible. The slip of the wire electrode 1 can be detected.
- any one of the first to third embodiments may be configured to include the slip detection unit. Needless to say.
- the disconnection detection counter threshold value stored in the disconnection detection counter threshold value storage unit 24 is the same value for the disconnection detection device 21a and the slip detection device 26, but different values are used. It may be set.
- the speed controller 15, the motor controller 16, the host controller 17, the speed calculator 18, the speed fluctuation compensator 19, which are components of the wire electrical discharge machining apparatus according to the first to fourth embodiments,
- Some or all of the disconnection detection device 21a, the comparator 22, the disconnection detection counter 23, the averaging processing device 25, and the slip detection device 26 are either hardware or software, or both. You may make it implement
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Abstract
Description
図1は、本発明の実施の形態1にかかるワイヤ放電加工装置の構成を示す図である。実施の形態1のワイヤ放電加工装置は、ワイヤ電極1と、ワイヤ電極1を供給するワイヤボビン3と、ワイヤ電極1が走行する経路上に配設されるワイヤガイドローラ4、5、6、7、10と、ワイヤ電極1を所定の速度で回収する回収ローラ11a、11bと、回収ローラ11aを駆動する回収モータ12と、回収モータ12の回転速度を制御する速度制御器15と、ワイヤ電極1の張力を張架する張力ローラ9と、ワイヤ電極1を張力ローラ9に押し付けるピンチローラ8a、8bと、張力ローラ9を駆動する張力モータ13と、張力モータ13に取り付けられたエンコーダ14と、張力モータ13を制御するモータ制御器16と、速度制御器15およびモータ制御器16を上位で制御する上位制御装置17とを備える。
図6は、実施の形態2のワイヤ放電加工装置の構成を示す図である。ここでは、実施の形態1と同じ構成要素には同一の符号を付し、重複する説明を省略する。
図9は、実施の形態3のワイヤ放電加工装置の構成を示す図である。ここでは、実施の形態1と同じ構成要素には同一の符号を付して重複する説明を省略する。
図11は、実施の形態4のワイヤ放電加工装置の構成を説明する図である。ここでは、実施の形態2と同じ構成要素には同一の符号を付して重複する説明を省略することとする。
2 被加工物
3 ワイヤボビン
4、5、6、7、10 ワイヤガイドローラ
8a、8b ピンチローラ
9 張力ローラ
11a、11b 回収ローラ
12 回収モータ
13 張力モータ
14 エンコーダ
15 速度制御器
16 モータ制御器
17 上位制御装置
18 速度算出装置
19 速度変動補償器
20 断線検出閾値記憶部
21、21a、21b 断線検出装置
22 比較器
23 断線検出カウンタ
24 断線検出カウンタ閾値記憶部
25 平均化処理装置
26 すべり検出装置
Claims (5)
- ワイヤ電極を回収する回収ローラと、
前記回収ローラを駆動して前記ワイヤ電極を所定の速度で走行させる回収モータと、
前記回収ローラとの間で前記ワイヤ電極に張力を付与する張力ローラと、
前記張力ローラを駆動する張力モータと、
前記張力モータの回転速度を算出する速度算出部と、
前記速度算出部から出力された回転速度に基づいて前記張力モータの回転速度の変動を抑制する速度補償値を生成する速度変動補償部と、
予め設定された断線検出閾値と前記速度変動補償部から出力される速度補償値との比較に基づいて前記ワイヤ電極の断線を検出する断線検出部と、
を備えることを特徴とするワイヤ放電加工装置。 - 前記断線検出部は、
前記速度変動補償部から出力される速度補償値が前記断線検出閾値よりも大きいとき、前記ワイヤ電極が断線している旨の通知を発行し、前記速度変動補償部から出力される速度補償値が前記断線検出閾値よりも小さいとき、前記ワイヤ電極が断線している旨の通知を発行しない、
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。 - 前記断線検出部は、
前記速度変動補償部から出力される速度補償値が前記断線検出閾値を連続して越えている状態の経過時間を計測し、前記計測した経過時間が予め設定されている第1の経過時間閾値よりも大きいとき、前記ワイヤ電極が断線している旨の通知を発行し、前記計測した経過時間が前記第1の経過時間閾値よりも小さいとき、前記ワイヤ電極が断線している旨の通知を発行しない、
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。 - 前記断線検出部は、前記速度変動補償部から出力される速度補償値を平均化処理し、前記平均化処理後の速度補償値が前記断線検出閾値よりも大きいとき、前記ワイヤ電極が断線している旨の通知を発行し、前記平均化処理後の速度補償値が前記断線検出閾値よりも小さいとき、前記ワイヤ電極が断線している旨の通知を発行しない、
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。 - 前記速度変動補償部から出力される速度補償値が前記断線検出閾値を連続して越えている状態の経過時間を計測し、前記計測した経過時間が予め設定されている第2の経過時間閾値に到達することなく前記速度補償値が前記断線検出閾値以下となったとき、前記ワイヤ電極のすべりを検出した旨の通知を発行するすべり検出部をさらに備える、
ことを特徴とする請求項1乃至請求項4のうちの何れか一項に記載のワイヤ放電加工装置。
Priority Applications (5)
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US14/130,634 US9308594B2 (en) | 2011-07-06 | 2011-07-06 | Wire electrical discharge machining apparatus |
PCT/JP2011/065473 WO2013005315A1 (ja) | 2011-07-06 | 2011-07-06 | ワイヤ放電加工装置 |
CN201180072093.3A CN103648699B (zh) | 2011-07-06 | 2011-07-06 | 线电极放电加工装置 |
JP2013522653A JP5478783B2 (ja) | 2011-07-06 | 2011-07-06 | ワイヤ放電加工装置 |
DE112011105416.5T DE112011105416T8 (de) | 2011-07-06 | 2011-07-06 | Elektrische Drahterodier-Bearbeitungsvorrichtung |
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PCT/JP2011/065473 WO2013005315A1 (ja) | 2011-07-06 | 2011-07-06 | ワイヤ放電加工装置 |
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JP (1) | JP5478783B2 (ja) |
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DE112014006521B4 (de) * | 2014-03-27 | 2019-03-28 | Mitsubishi Electric Corporation | Steuerungsvorrichtung für eine Drahterosionsmaschine |
JP6219785B2 (ja) * | 2014-06-23 | 2017-10-25 | ファナック株式会社 | 断線修復手段を備えたワイヤ放電加工機 |
JP6348131B2 (ja) * | 2016-01-07 | 2018-06-27 | ファナック株式会社 | 給電線の劣化検出機能を有するワイヤ放電加工機 |
CN109937109B (zh) * | 2016-11-15 | 2020-09-18 | 三菱电机株式会社 | 线放电加工机 |
JP6360212B1 (ja) * | 2017-01-31 | 2018-07-18 | ファナック株式会社 | ワイヤ放電加工機 |
CN107834926A (zh) * | 2017-12-15 | 2018-03-23 | 成都富临精工新能源动力有限公司 | 一种基于电压模型的主动阻尼系统及主动阻尼方法 |
US20230060166A1 (en) * | 2020-01-28 | 2023-03-02 | Fanuc Corporation | Estimation method and control device for wire electrical discharge machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0655359A (ja) * | 1992-08-08 | 1994-03-01 | Makino Milling Mach Co Ltd | ワイヤ放電加工機のワイヤ電極送り方法および装置 |
JPH07178621A (ja) * | 1993-12-22 | 1995-07-18 | Fanuc Ltd | ワイヤカット放電加工機の送り機構監視装置 |
JPH08197335A (ja) * | 1995-01-27 | 1996-08-06 | Fanuc Ltd | ワイヤ放電加工機における断線検出方法 |
JPH08215939A (ja) * | 1994-11-17 | 1996-08-27 | Ind Elektronik Agie Losone Locarno:Ag | 電食プロセスの制御方法および装置 |
JP2003103418A (ja) * | 2001-09-28 | 2003-04-08 | Brother Ind Ltd | ワイヤ放電加工機、ワイヤ放電加工機の制御方法およびワイヤ放電加工機制御用プログラム |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3419944C1 (de) * | 1984-05-15 | 1985-11-21 | Aktiengesellschaft für industrielle Elektronik AGIE Losone bei Locarno, Losone, Locarno | Vorrichtung zum Fuehren einer draht- oder bandfoermigen Schneidelektrode an einer Werkzeugmaschine |
JP2599290B2 (ja) | 1988-10-27 | 1997-04-09 | 三菱電機株式会社 | ワイヤ放電加工装置 |
JP2705427B2 (ja) * | 1992-02-07 | 1998-01-28 | 三菱電機株式会社 | 放電加工装置 |
JP3416514B2 (ja) | 1997-03-07 | 2003-06-16 | 株式会社ソディック | ワイヤ放電加工装置に於けるワイヤ電極の張力制御方法及びその装置 |
CN1111107C (zh) * | 2000-07-17 | 2003-06-11 | 财团法人工业技术研究院 | 线切割放电加工方法及其装置 |
US7323659B2 (en) * | 2004-09-28 | 2008-01-29 | Illinois Tool Works Inc. | System and method of precise wire feed control in a welder |
DE112006000044B4 (de) * | 2006-04-05 | 2009-05-28 | Mitsubishi Electric Corp. | Erodiermaschine und Erodierbearbeitungsverfahren |
WO2012108250A1 (ja) * | 2011-02-07 | 2012-08-16 | 三菱電機株式会社 | ワイヤ自動結線装置 |
-
2011
- 2011-07-06 WO PCT/JP2011/065473 patent/WO2013005315A1/ja active Application Filing
- 2011-07-06 CN CN201180072093.3A patent/CN103648699B/zh active Active
- 2011-07-06 JP JP2013522653A patent/JP5478783B2/ja active Active
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- 2011-07-06 DE DE112011105416.5T patent/DE112011105416T8/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0655359A (ja) * | 1992-08-08 | 1994-03-01 | Makino Milling Mach Co Ltd | ワイヤ放電加工機のワイヤ電極送り方法および装置 |
JPH07178621A (ja) * | 1993-12-22 | 1995-07-18 | Fanuc Ltd | ワイヤカット放電加工機の送り機構監視装置 |
JPH08215939A (ja) * | 1994-11-17 | 1996-08-27 | Ind Elektronik Agie Losone Locarno:Ag | 電食プロセスの制御方法および装置 |
JPH08197335A (ja) * | 1995-01-27 | 1996-08-06 | Fanuc Ltd | ワイヤ放電加工機における断線検出方法 |
JP2003103418A (ja) * | 2001-09-28 | 2003-04-08 | Brother Ind Ltd | ワイヤ放電加工機、ワイヤ放電加工機の制御方法およびワイヤ放電加工機制御用プログラム |
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DE112011105416T5 (de) | 2014-04-10 |
US20140144885A1 (en) | 2014-05-29 |
US9308594B2 (en) | 2016-04-12 |
CN103648699B (zh) | 2015-06-17 |
CN103648699A (zh) | 2014-03-19 |
DE112011105416T8 (de) | 2014-06-18 |
JPWO2013005315A1 (ja) | 2015-02-23 |
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