JP2011188669A - Device, method and program for detecting wire strip processing operation nonconformity - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect an nonconformity during a wire strip processing operation. <P>SOLUTION: A wire strip processing operation nonconformity detecting device detects the fault of an operation of a strip blade, when a coating of the wire is stripped by using the strip blade driven by a blade driving part. The wire strip processing operation fault detection device includes a vibration detection part detecting vibration of at least the blade driving part or the strip blade and a fault determining part determining the fault of the wire strip processing operation, on the basis of a vibration detection signal input from the vibration detection part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for detecting a failure during a processing operation when stripping a coating of an electric wire.

  Conventionally, there is a technique disclosed in Patent Documents 1 and 2 as a technique for stripping the coating at the end of the electric wire. Patent Documents 1 and 2 disclose a technique for removing the insulation coating by cutting the strip blade into the insulation coating of the electric wire and then moving the electric wire in the axial direction thereof.

Japanese Patent Laid-Open No. 9-326286 JP 2009-44885 A

  However, in the strip device as described above, when used to some extent, problems such as a shift in the mounting position of the strip blade and a loss of grease in the drive system may occur. If the mounting position of the strip blades is shifted and the strip blades come into contact with each other, problems such as deterioration of the blade tip occur. Further, when the grease is cut, there is a problem that the life of the drive system is shortened.

  Conventionally, the above problems have been confirmed by periodic visual inspections and the like. Alternatively, when such a regular visual inspection or the like is not performed, the device is continuously used without noticing a malfunction.

  SUMMARY OF THE INVENTION An object of the present invention is to make it possible to detect a problem during an electric wire strip processing operation.

  In order to solve the above-described problem, the first aspect is a wire strip processing operation failure that detects the occurrence of a failure in the operation of the strip blade when stripping the coating of the wire using a strip blade driven by the blade drive unit. Occurrence of defects in wire strip processing operation based on a vibration detection unit that is a detection device and detects a vibration of at least one of the blade driving unit and the strip blade, and a vibration detection signal input from the vibration detection unit And a failure determination processing unit.

  A 2nd aspect is an electric wire strip process operation malfunction detection apparatus which concerns on a 1st aspect, Comprising: The said vibration detection part is made into the resonance type AE sensor with the resonance frequency in the range of 100 kHz-300 kHz.

  A 3rd aspect is an electric wire strip process operation malfunction detection apparatus which concerns on the 1st or 2nd aspect, Comprising: The said malfunction determination process part is an electric wire based on the magnitude | size of the vibration energy amount which the said vibration detection signal represents. The occurrence of a defect in the strip processing operation is determined.

  A 4th aspect is an electric wire strip process operation malfunction detection apparatus which concerns on a 3rd aspect, Comprising: The said malfunction determination process part specifies malfunction occurrence period based on the vibration energy amount which the said vibration detection signal represents, Identify the failure that occurred based on the occurrence status of the failure occurrence period.

  A 5th aspect is an electric wire strip process operation malfunction detection apparatus which concerns on a 4th aspect, Comprising: The said malfunction determination process part generate | occur | produces a malfunction in operation | movement of a strip blade, when the said malfunction generation period arises continuously. It is determined that

  A 6th aspect is an electric wire strip process operation malfunction detection apparatus which concerns on the 4th or 5th aspect, Comprising: The said malfunction determination process part is the said blade drive part when the said malfunction occurrence period arises periodically. It is determined that a malfunction has occurred in the rotating system mechanism.

  A seventh aspect is a wire strip processing operation failure detection device according to any one of the first to sixth aspects, wherein a pair of strip blades capable of being cut into a sheath of an electric wire and the pair of strip blades are approached And a blade driving unit that moves the blades apart.

  An eighth aspect is an electric wire strip processing operation failure detection device according to the seventh aspect, wherein the vibration detection unit is provided so as to contact at least one of the pair of strip blades.

  A ninth aspect is a wire strip processing operation failure detection method for detecting occurrence of failure in operation of the strip blade when stripping the coating of the wire using a strip blade driven by a blade drive unit, a) performing a process of cutting the strip blade into the electric wire; (b) detecting at least one vibration of the blade driving unit and the strip blade in the step (a); and (c) the vibration. And a step of determining occurrence of a failure in the electric wire strip processing operation based on a vibration detection signal input from the detection unit.

  The tenth aspect detects vibration of at least one of the blade driving unit and the strip blade when stripping the coating of the electric wire using the strip blade driven by the blade driving unit, and based on the vibration detection signal. A wire strip processing operation failure detection program for detecting occurrence of failure in the operation of the strip blade, comprising: (A) comparing the vibration detection signal with a failure occurrence reference to a computer; and (B) the step It is a wire strip processing operation failure detection program for realizing the step of determining the occurrence of a failure in the wire strip processing operation based on the comparison result in (A).

  According to the first to tenth aspects, when the blade driving unit or the strip blade vibrates due to a malfunction during the wire strip processing operation, the vibration is detected by the vibration detecting unit. And generation | occurrence | production of the malfunction of an electric wire strip process operation | movement is determined based on the vibration detection signal input from the vibration detection part. For this reason, it is possible to detect a problem during the wire strip processing operation.

  In general, a defect during the strip processing operation is observed as friction between metal parts such as friction between drive elements or strip blades. In general, the frequency of vibration caused by contact between metals is easily observed within a range of 100 kHz to 300 kHz. Therefore, as in the second aspect, by using a resonance type AE sensor having a resonance frequency in the range of 100 kHz to 300 kHz as the vibration detection unit, it is possible to more reliably detect a malfunction during the strip processing operation.

  In addition, due to defects during the strip processing operation, friction between metal parts and the amount of vibration energy represented by the vibration detection signal increase. Therefore, as in the third aspect, by determining the occurrence of a failure in the wire strip processing operation based on the magnitude of the vibration energy amount represented by the vibration detection signal, the failure during the strip processing operation is more reliably performed. It can be detected.

  Also, the occurrence status of the defect occurrence period varies depending on the defect occurrence location. Therefore, as in the fourth aspect, it is possible to identify a failure that has occurred based on the occurrence status of the failure occurrence period.

  More specifically, as in the fifth aspect, when the malfunction occurrence period occurs continuously, it can be determined that a malfunction has occurred in the operation of the strip blade.

  Alternatively, as in the sixth aspect, when the failure occurrence period occurs periodically, it can be determined that a failure has occurred in the rotary mechanism in the blade drive unit.

  Moreover, according to the 7th aspect, the coating | cover of an electric wire can be stripped, detecting the malfunction of an electric wire strip process operation.

  According to the 8th aspect, the contact with a strip blade and a core wire can also be detected easily and reliably.

It is a schematic side view which shows an electric wire strip processing apparatus. It is explanatory drawing which shows a strip blade and an electric wire. It is explanatory drawing which shows the state which the strip blade cut into the electric wire. It is a block diagram which shows the hardware constitutions of a malfunction determination process part. It is a functional block diagram of a defect determination processing unit. It is a flowchart which shows a malfunction determination process. It is a figure which shows the example of an amplitude waveform in a malfunction non-occurrence | production state. It is a figure which shows distribution of the vibration energy amount in a malfunction non-occurrence state in time order. It is a figure which shows the example of an amplitude waveform in the contact state of strip blades. It is a figure which shows distribution of the vibration energy amount in the contact state of strip blades in time order. It is a figure which shows the example of an amplitude waveform in the state in which the grease cutting | disconnection of the blade drive part has arisen. It is a figure which shows distribution of the vibration energy amount in the state in which the grease cutting | disconnection of the blade drive part has arisen in time order.

  Hereinafter, the electric wire strip processing operation failure detection device according to the embodiment will be described.

  FIG. 1 is a schematic side view showing a wire strip processing device 10 to which a wire strip processing operation failure detection device is applied. The wire strip processing device 10 includes a wire strip unit 12 and a wire strip processing operation failure detection device 40.

  The electric wire strip unit 12 is a device for peeling the coating Wb at the end of the electric wire W, and a pair of strip blades 14A and 14B, a blade driving unit 16, an electric wire holding unit 20, and a coating removal driving unit 22. And.

  The pair of strip blades 14 </ b> A and 14 </ b> B are formed in a blade shape that can be cut into the coating Wb of the electric wire W. An insulating resin member made of polyvinyl chloride or the like is used for the covering Wb. Here, the tip portions of the pair of strip blades 14A and 14B are formed in a V-shaped blade shape that is recessed in a substantially V shape (see FIG. 2). And the V-shaped blade-shaped part is formed so as to be able to be cut into the coating Wb of the electric wire W (see FIG. 3). In addition, the shape of strip blade 14A, 14B is not restricted to the said example, For example, a substantially circular arc-shaped concave blade shape may be sufficient.

  The blade driving unit 16 is configured to be able to move the pair of strip blades 14A and 14B closer to and away from each other. Here, the blade drive unit 16 includes a pair of blade support portions 17A and 17B, a screw portion 18 that movably supports the blade support portions 17A and 17B, and a motor 19 that rotates the screw portion 18. .

  The threaded portion 18 is disposed along a predetermined direction (here, the up-down direction), and is supported so as to be rotatable around its central axis. A thread groove along a predetermined spiral direction is formed in one end side portion 18a of the screw portion 18, and a thread groove along a reverse spiral direction is formed in the other end side portion 18b of the screw portion 18. .

  The motor 19 is configured by a motor capable of driving and controlling the amount of rotation such as a servo motor, and is arranged in a manner capable of transmitting the rotational driving force to the screw portion 18. Here, the drive shaft portion of the motor 19 is directly connected to the screw portion 18. And according to the rotational drive of the motor 19, the screw part 18 is comprised so that rotation in the forward / reverse direction is possible.

  The pair of blade support portions 17A and 17B are formed in a long member, and the strip blades 14A and 14B are fixedly supported at the respective front end portions. In addition, a threaded portion 17Aa that can be screwed with the one end side portion 18a of the screw portion 18 is formed at the base end portion of the one blade support portion 17A, and the base end portion of the other blade support portion 17B is formed at the base end portion. A threaded portion 17Ba that can be threadedly engaged with the other end portion 18b of the threaded portion 18 is formed.

  Then, the threaded portion 17Aa of one blade support portion 17A is screwed to the one end side portion 18a of the screw portion 18 in a posture in which the tip portions of the pair of strip blades 14A and 14B are opposed to each other, and the other blade support portion The threaded portion 17Ba of 17B is threadedly engaged with the other end portion 18b of the threaded portion 18. In this state, the motor 19 is controlled to rotate in the forward direction or the reverse direction, so that the pair of strip blades 14A and 14B can be moved closer to or away from each other.

  A rotating system in which the base end portion of the blade support portion 17A, 17B screwed to the motor 19, the screw portion 18, and the screw portion 18 among the blade drive portion 16 drives the strip blades 14A, 14B by using the rotation operation. It will be a mechanism.

  However, the blade driving unit is not limited to the above-described configuration, and may be configured to be driven by an air cylinder, a hydraulic cylinder, a linear motor, or the like, and is configured to separately drive the pair of strip blades 14A and 14B. May be.

  The electric wire holding part 20 is configured to hold the electric wire W in a posture in which the end of the electric wire W is disposed between the pair of strip blades 14A and 14B. As such an electric wire holding part 20, for example, a known chuck mechanism that opens and closes a pair of gripping claws by driving an actuator such as an air cylinder or a hydraulic cylinder can be used. In short, the electric wire can be held. A configuration can be employed.

  The sheath removal drive unit 22 is configured as a mechanism that imparts a motion to remove the sheath Wb at the end of the wire W by moving the pair of strip blades 14A and 14B and the wire holding portion 20 in the separating direction. . Here, the coating removal drive unit 22 is configured by an actuator such as an air cylinder or a hydraulic cylinder, and is configured to move the wire holding unit 20 in a direction in which the wire holding unit 20 is separated from the pair of strip blades 14A and 14B. ing.

  The electric wire strip unit 12 strips the coating Wb at the end of the electric wire W as follows under the control of the strip processing control unit 28.

  That is, with the pair of strip blades 14A and 14B moved away from each other, the end portion of the electric wire W is disposed between the pair of strip blades 14A and 14B, and the electric wire W is held by the electric wire holding portion 20 ( (See FIG. 2). In this state, the pair of strip blades 14 </ b> A and 14 </ b> B are moved closer to each other by driving the blade driving unit 16. Then, the V-shaped blade-shaped portion cuts into the covering Wb in a state where the core wire Wa is disposed in a region surrounded by the V-shaped blade-shaped portions of the pair of strip blades 14A and 14B (see FIG. 3). As described above, when the pair of strip blades 14A and 14B and the electric wire holding unit 20 are moved in the separation direction by driving the coating removal driving unit 22 with the V-shaped blade-shaped portion cut into the coating Wb, the coating is performed. A portion of Wb on the tip side from the V-shaped blade-shaped portion is removed from the portion of the electric wire W held by the electric wire holding portion 20 so that the core wire Wa is exposed at the end portion of the electric wire W. The above operation is performed based on an operation signal given from the strip processing control unit 28 to the wire strip unit 12. In this operation signal, a command related to the operation control of the pair of strip blades 14A and 14B, for example, a drive start command for the pair of strip blades 14A and 14B, a state in which the pair of strip blades 14A and 14B are cut into the coating Wb. The target position command according to the position to be stopped is included. This operation signal is also input to a defect determination processing unit 50 described later as a signal representing the operation timing of the pair of strip blades 14A and 14B.

  Here, when the coating Wb of the electric wire W is stripped by the pair of strip blades 14A and 14B driven by the driving of the blade driving unit 16, the following two problems are assumed as problems of the operation of the strip blade.

  The first problem is a problem caused by contact between the strip blades 14A and 14B. That is, normally, the strip blades 14A and 14B are attached to the blade support portions 17A and 17B in a replaceable manner by screwing or the like. For this reason, the attachment positions of the strip blades 14A and 14B may be shifted during the strip operation, and the strip blades 14A and 14B may come into contact with each other. If the strip processing is repeated in a state where the blade edges of the strip blades 14A and 14B are rubbed against each other, the strip blades 14A and 14B are likely to deteriorate.

  The second problem is due to insufficient grease. That is, in the blade drive unit 16, the screw portion 18 is rotatably supported, and the screw portion 18 is screwed into the blade support portions 17A and 17B, and grease is applied to the frictional portions. Yes. However, if the strip operation is continued, grease shortage may occur due to grease scattering, evaporation, and the like. And when grease shortage arises, each part of the blade drive part 16 will be abraded, and the problem that a lifetime becomes short will arise.

  The wire strip processing operation failure detection device 40 is configured as a device that detects the occurrence of a failure in the operation of the strip blades 14A and 14B when the coating Wb of the wire W is stripped as described above.

  That is, the electric wire strip processing operation defect detection device 40 includes a vibration detection unit 42 and a defect determination processing unit 50.

  The vibration detection unit 42 is configured to be able to detect vibration of at least one of the blade driving unit 16 and the strip blades 14A and 14B.

  In addition, the troubles during the strip processing operation as described above are observed as friction between the screw portion 18 and its supporting portion, the screw portion 18 and the blade support portions 17A and 17B, or the strip blades 14A and 14B. . Therefore, the vibration detector 42 can detect vibrations observed due to friction between the screw portion 18 and its supporting portion, the screw portion 18 and the blade support portions 17A and 17B, or the strip blades 14A and 14B. I just need it.

  However, the screw portion 18 and its supporting portion, the screw portion 18 and the blade support portions 17A and 17B, or the strip blades 14A and 14B are usually metal parts. In general, an AE (Acoustic Emission) wave generated by contact between metals, destruction, or the like is less likely to be observed within a range of 100 kHz to 300 kHz. For this reason, it is preferable that the vibration detection part 42 can detect the vibration of the frequency range which overlaps partially or entirely with respect to the range of 100 kHz-300 kHz. More preferably, it is preferable that the vibration detection unit 42 can detect vibration with high sensitivity in the range of 100 kHz to 300 kHz, and more specifically, the vibration detection unit 42 has a resonance type AE having a resonance frequency in the range of 100 kHz to 300 kHz. A sensor is preferred. More preferably, it is a resonance type AE sensor having a resonance frequency of 200 kHz.

  In addition, here, the vibration detection unit 42 is attached and fixed so as to be in contact with the strip blade 14A. More specifically, the vibration detector 42 is attached and fixed so that the detection surface of the vibration detector 42 is in contact with one main surface of the strip blade 14A. The attachment and fixing of the vibration detection unit 42 can be performed by various attachment structures such as screw fastening and adhesion. Further, the attachment position of the vibration detection unit 42 may be the strip blade 14A itself or a portion holding the strip blade 14A as long as it does not interfere with the strip operation. In this way, by attaching and fixing the vibration detection unit 42 in contact with the strip blade 14A, vibration due to contact between the strip blades 14A and 14B can be detected. Further, the vibration generated in each part of the blade driving unit 16 can be detected because it is transmitted to the strip blades 14A and 14B via the blade support portions 17A and 17B.

  When the strip blades 14A and 14B cut into the coating Wb of the electric wire W, if the strip blades 14A and 14B come into contact with the core wire Wa, an AE wave is also generated by the contact. This AE wave is also detected by the vibration detector 42.

  However, the vibration detection unit 42 may be attached so as to be able to detect vibrations of at least one of the blade drive unit 16 and the strip blades 14A and 14B. For example, the vibration detection unit 42 is attached in contact with the blade support portions 17A and 17B. It may be. Moreover, the vibration detection part 42 may be provided in each of a pair of strip blade 14A, 14B.

  The vibration detection signal from the vibration detection unit 42 is input to the defect determination processing unit 50 as an analog signal having a voltage corresponding to the detected vibration, for example.

  FIG. 4 is a block diagram illustrating a hardware configuration of the defect determination processing unit 50. The defect determination processing unit 50 is configured to be able to execute a process for determining occurrence of a defect in the wire strip processing operation based on the vibration detection signal input from the vibration detection unit 42.

  More specifically, the defect determination processing unit 50 is configured by a general computer in which a CPU 52, a ROM 53, a RAM 54, an external storage device 55, and the like are interconnected via a bus line 51. The ROM 53 stores basic programs and the like, and the RAM 54 is used as a work area when the CPU 52 performs predetermined processing. The external storage device 55 is configured by a nonvolatile storage device such as a flash memory or a hard disk device. The external storage device 55 stores a defect detection program 55a for performing an electric wire strip processing operation defect determination process to be described later. The CPU 52 as the main control unit performs arithmetic processing according to the procedure described in the defect detection program 55a, so that various functions for detecting an operation defect during the wire strip process are realized as will be described later. ing. The defect detection program 55a is normally stored and used in advance in a memory such as the external storage device 55, but is recorded in a recording medium such as a CD-ROM or DVD-ROM or an external flash memory. It may be provided as a (program product) or provided by downloading from an external server via a network, and may be additionally or exchanged and stored in a memory such as the external storage device 55. Note that some or all of the functions performed by the defect determination processing unit 50 may be realized by hardware using a dedicated logic circuit or the like.

  In addition, the external storage device 55 stores a threshold 55b, a continuity determination reference 55c, and a periodicity determination reference 55d as energy thresholds that serve as a reference when performing the above-described defect determination processing. The threshold 55b, the continuity criterion 55c, and the periodicity criterion 55d will be described later.

  In the defect determination processing unit 50, the detection signal input circuit unit 56, the output circuit unit 57 a, the input circuit unit 57 b, the input unit 58, and the display unit 59 are also connected to the bus line 51.

  The detection signal input circuit unit 56 includes an amplifier circuit, a filter circuit, an AD conversion circuit, and the like. When the vibration detection signal obtained by the vibration detection unit 42 is input as an analog signal, the signal is input to an AD conversion circuit through an amplifier circuit and a filter circuit and converted into a digital signal. In addition, as a filter circuit, it is preferable to use the band pass filter which has a 100 kHz-300 kHz pass region according to the AE wave by destruction of a metal, for example. The vibration detection signal converted into a digital signal by the detection signal input circuit unit 56 is stored in, for example, the RAM 54 or the external storage device 55 as waveform data whose amplitude value changes with time, and is used for a defect detection process described later. Is done.

  The output circuit unit 57a is an output circuit that outputs control signals and the like to other devices under the control of the CPU 52. Various signals from the outside, here, operation signals from the strip processing control unit 28, are input to the input circuit unit 57b through the input circuit unit 57b.

  The input unit 58 includes various switches, a touch panel, and the like, and can receive various instructions to the defect determination processing unit 50 in addition to the input setting instructions for the threshold 55b, the continuity determination criterion 55c, and the periodicity determination criterion 55d. It is configured.

  The display unit 59 includes a liquid crystal display device, a lamp, and the like, and is configured to be able to display various information such as a failure determination result under the control of the CPU 52.

  FIG. 5 is a functional block diagram of the defect determination processing unit 50. As shown in the figure, the defect determination processing unit 50 has functions as a comparison unit 52a and a determination unit 52b. These functions are realized by the CPU 52 performing predetermined arithmetic processing according to the defect detection program 55a as described above.

  The comparison unit 52a identifies the malfunction occurrence period with reference to the threshold value based on the input vibration detection signal. This determination is performed for each divided period by dividing a period that is a determination range in the input vibration detection signal into a plurality of periods. Then, the comparison unit 52a gives the comparison result to the determination unit 52b.

  The determination unit 52b refers to the continuity determination criterion 55c and the periodicity determination criterion 55d based on the determination result for each period by the comparison unit 52a, and whether or not a defect occurrence period has occurred and whether a defect has occurred. It is determined whether the period occurs periodically. And if it determines with the malfunction occurrence period having arisen continuously, the determination result that the malfunction has generate | occur | produced in the operation | movement of a strip blade will be output. Further, if it is determined that the defect occurrence period is periodically generated, a determination result that a defect has occurred in the rotary system mechanism in the blade driving unit 16 is output. These determination results are used for stop control of the electric wire strip unit 12, display on the display unit 59, and the like.

  FIG. 6 is a flowchart showing the defect determination process by the defect determination processing unit 50.

  After starting the defect determination process, the defect determination processing unit 50 cuts out waveform data representing the vibration detected by the vibration detection unit 42 in a predetermined determination range based on the operation signal from the wire strip unit 12 in step S1. . Here, it is preferable that the determination range includes at least a part of the period when the pair of strip blades 14A and 14B move closer to each other. More preferably, the determination range is set as a period before the pair of strip blades 14A and 14B start approaching and before stopping. The determination range may be obtained by cutting out a certain period with reference to the operation start command or the operation stop command of the strip blades 14A and 14B by the wire strip unit 12. Alternatively, when the speed information or the position information of the strip blades 14A and 14B is fed back, the cutting may be performed based on the speed information or the position information. In the case where the determination range is cut out based on the speed information, for example, after the strip blades 14A and 14B start moving, it is preferable to cut out a range where the strip blade moves at a constant speed. This is because if the moving speeds of the strip blades 14A and 14B are constant, it is considered that the vibration caused by the failure of the blade driving unit 16 has a constant tendency, and thus it is considered easy to specify the type of the failure.

  In the next step S2, based on the sampled waveform data, the determination range is divided into a plurality of (arbitrary preset number) periods, and the vibration energy amount represented by the vibration detection signal is calculated for each period. The amount of vibration energy detected by the vibration detector 42 is expressed as an amount corresponding to the amplitude of the amplitude waveform. For this reason, the vibration energy amount may be an average value, an integrated value, an effective value (a so-called approximately calculated effective value), or a true effective value of the amplitude value (absolute value) of the waveform data in each period. Or a representative value in each period. In short, an amount corresponding to the vibration energy detected in each period may be acquired based on the vibration detection signal. The determination range may be divided into at least two. In addition, the determination range is usually divided into a plurality of equal parts, but it is not always necessary to divide the decision range evenly.

  In the next step S3, the value of the calculated vibration energy amount is compared with the threshold 55b in time series. Here, the threshold value 55b is a value that is larger (preferably slightly larger) than the amount of energy observed when the strip blades 14A and 14B move close to each other, is determined experimentally and empirically, and is stored in the storage unit 55 in advance. Stored. Hereinafter, a period in which the vibration energy amount exceeds the threshold 55b may be referred to as a malfunction occurrence period. The threshold 55b may be constant for each divided period or may be a different value. For example, when the speed of the strip blades 14A and 14B changes, a smaller threshold 55b may be set for a period during which the speed is low. This is because if the speed of the strip blades 14A and 14B is reduced, the amount of vibration energy generated by rubbing is considered to be reduced.

  In step S4, it is determined whether the number of vibration energy amounts exceeding the threshold 55b (count number) exceeds a specified number. When the count number does not exceed the specified number, it is determined that there is no abnormality. If it is determined in step S4 that there is no abnormality, the wire strip processing apparatus 10 may continue its operation as it is. On the other hand, when it is determined in step S4 that there is an abnormality, the process proceeds to the next step S5.

  When the value of the vibration energy amount is the same as the threshold 55b, it may be added to the count number or may not be added. This designated number indicates a reference value indicating how much the ratio of the period during which the value of the vibration energy amount exceeds the threshold 55b in the determination range is determined as the occurrence of an operation failure of the strip process. As described above, when the number of vibration energy amounts exceeding the threshold 55b exceeds the specified number, it is determined that the operation failure of the strip processing has occurred, so that an error due to an external short-term noise due to a factor other than the failure is detected. Judgment can be eliminated. The specified number is determined experimentally and empirically according to the length of the period in which the determination range is divided, the threshold 55b, and the like, and is stored in the storage unit 55 in advance.

  In step S5, it is determined with reference to the continuity determination criterion 55c whether or not the threshold 55b is continuously exceeded, that is, whether or not a failure occurrence period is continuously generated. As the determination process here, for example, a process for determining that the number of consecutive failure occurrence periods in time series exceeds a predetermined reference continuous number (continuity determination reference 55c) (same as above). In some cases, any determination may be used. The reference number as the continuity determination reference 55 c is determined experimentally and empirically and stored in the storage unit 55 in advance. In step S5, when it is determined that the failure occurrence period is continuously generated, it is determined that the operation failure of the strip blades 14A and 14B, more specifically, the occurrence of rubbing. The determination result is displayed on the display unit 59 or the like as information for prompting the worker to perform maintenance. On the other hand, when it is determined in step S5 that the malfunction occurrence period is not continuous, the process proceeds to next step S6.

  In step S6, it is determined with reference to the periodicity determination criterion 55d whether or not the exceeding period appears periodically, that is, whether or not the malfunction occurrence period occurs periodically. As the determination process here, for example, a central period in a continuous period in which the vibration energy amount exceeds the threshold 55b (the determination as to whether or not it is a continuous period may also be made based on whether or not it exceeds a predetermined reference number). Alternatively, a process of searching for a period showing a peak and determining that the period is the same when the number of periods between the periods of the center or the peak is within a predetermined reference range (periodicity determination reference 55d) (if they are the same) Or any of these determinations) can be used. The reference range is a reference range corresponding to the period of one rotation of the screw portion 18, is determined according to the rotational speed of the screw portion 18 by the motor 19, and is stored in the storage unit 55 in advance. This reference range may be corrected as appropriate according to the rotational speed of the screw portion 18. In addition, as a determination process, a process that determines that the period between one or a series of malfunction occurrence periods is within a predetermined reference range (periodicity determination reference 55d) (in the case where they are the same). May be any determination). In step S6, if it is determined that the malfunction occurrence period is periodically generated, the malfunction of the rotary system mechanism in the blade driving unit 16, more specifically, the occurrence of periodic rubbing in the rotary system mechanism. It is determined that this is a malfunction. The determination result is displayed on the display unit 59 or the like as information for prompting the worker to perform maintenance. On the other hand, if it is determined in step S6 that the defect occurrence period does not occur periodically, it is determined that another abnormality has occurred. This determination result is also displayed on the display unit 59 or the like as information prompting the worker to perform maintenance.

  The operator can recognize and confirm the information in which the content of the defect is specified to some extent as described above, and can perform maintenance such as adjustment of the attachment of the strip blades 14A and 14B and replenishment of grease.

  According to the wire strip processing operation failure detection device, the wire strip processing operation failure detection method, and the wire strip processing operation failure detection program configured as described above, the blade driving unit 16 or the strip blade may be caused by a failure during the wire strip processing operation. When 14A and 14B vibrate, the vibration is detected by the vibration detector 42. Then, based on the vibration detection signal input from the vibration detection unit 42, a defect in the wire strip processing operation is determined. More specifically, when a problem due to some rubbing or the like occurs, the vibration energy amount increases due to the rubbing. Therefore, the defect of the wire strip processing operation is determined based on the magnitude of the vibration energy amount. For this reason, the malfunction of the wire strip processing operation is automatically detected.

  And an operator should just perform the maintenance of the electric wire strip processing apparatus 10 based on the detection result. For this reason, an appropriate apparatus state can be maintained without performing regular maintenance or the like.

  In addition, the occurrence of vibrations differs depending on the situation of rubbing due to defects. Therefore, the malfunction occurrence period is specified based on the vibration energy amount represented by the vibration detection signal, and the content of the malfunction that has occurred is identified based on the occurrence status of the malfunction occurrence period.

  In the present embodiment, the content of the defect is specified as follows. That is, as described above, when roughly classified, there are a problem caused by the contact between the strip blades 14A and 14B and a problem caused by insufficient grease of the blade drive unit 16.

  And the vibration by contact with strip blade 14A, 14B will generate | occur | produce continuously after that, when strip blade 14A, 14B approaches and both contact. Therefore, it is determined that a malfunction has occurred in the operation of the strip blade when the malfunction occurrence period (that is, the period in which the amount of vibration energy exceeds the threshold) continuously occurs.

  Further, when a problem due to insufficient grease of the blade driving unit 16 occurs, vibration is generated due to friction between the screw portion 18 and the blade support portions 17A and 17B. Such vibration is periodically generated according to the rotation of the screw portion 18. Therefore, when a malfunction occurrence period (that is, a period in which the amount of vibration energy exceeds the threshold) periodically occurs, it is determined that a malfunction has occurred in the rotary mechanism in the blade drive unit 16. Note that the period of the malfunction occurrence period may be at least once.

  In this way, since the location or cause of the failure is specified, the worker can perform the maintenance work more easily.

  Moreover, in the electric wire strip processing apparatus 10 provided with such an electric wire strip processing operation failure detection device 40, it is possible to detect a defect in the electric wire strip processing operation during the strip processing of the coating Wb of the electric wire W. .

  Further, since the vibration detection unit 42 is attached in contact with the strip blade 14A, vibration due to contact between the strip blade 14A and the core wire Wa can be easily detected. Then, by determining whether or not the vibration energy amount represented by the vibration detection signal output from the vibration detection unit 42 exceeds a predetermined threshold in a period in which the strip blades 14A and 14B are assumed to reach near the core wire Wa, Vibration due to contact between the strip blade 14A and the core wire Wa can also be easily detected.

  Here, based on the actual experimental results, the relationship between the amplitude waveform of the vibration that appears during strip processing and the distribution of the vibration energy amount calculated for each period will be described.

  FIG. 7 shows the relationship (amplitude waveform) between the time (s) and the amplitude (V) in the determination range T when stripping is performed in a state where no defect has occurred. 7, 9, and 11, the speed change of the strip blade is shown for reference. The determination range T is a period during which the speed of the strip blade is substantially constant.

  In this case, although a slight amplitude variation is observed, a relatively small amplitude waveform is shown as a whole.

  FIG. 8 is a diagram showing the vibration energy amount for each period calculated by dividing the determination range into 20 and showing the distribution of the calculated vibration energy amount in time order. As shown in the figure, when no failure occurs, the distribution of vibration energy amount is stable at a low value of approximately 0.5 (V) or less.

  FIG. 9 shows a relationship (amplitude waveform) between time (s) and amplitude (V) in the determination range T when stripping is performed in a state where the contact between the strip blades occurs. In this case, a portion where the amplitude becomes large in almost the entire determination range T was observed.

  FIG. 10 is a diagram illustrating the distribution of vibration energy amounts in FIG. 9 in time order. As shown in the figure, it can be seen that the period in which the vibration energy amount is larger than that in the case shown in FIG. 8 is continuous. Therefore, it is appropriate to determine that a failure due to contact between strip blades occurs when a failure occurrence period in which the amount of vibration energy increases compared to an appropriate threshold value or the like continuously occurs. It was confirmed.

  FIG. 11 shows the relationship (amplitude waveform) between time (s) and amplitude (V) in the determination range T when stripping is performed in a state where the grease of the blade driving unit 16 is broken. . In this case, it can be seen that the amplitude periodically increases in the determination range T.

  FIG. 12 is a diagram showing the vibration energy amount distribution of FIG. 11 in time order. As shown in the figure, in the determination range T, it can be seen that there are two series of periods in which the vibration energy amount increases. Therefore, when a failure occurrence period in which the vibration energy amount becomes larger than an appropriate threshold value or the like is periodically generated, a failure such as grease breakage occurs in the rotary system mechanism in the blade drive unit 16. It was confirmed that it was appropriate to judge.

<Modification>
In the above embodiment, three defect determinations are performed, that is, whether or not an abnormality has occurred is determined in step S4, whether or not the defect occurrence period is continuously generated is determined in step S5, and the defect occurrence period is determined in step S6. Is periodically determined, but only one or two determinations may be made.

  Moreover, the defect determination is not limited to the above example. For example, by comparing the waveform of the vibration detection signal with a predetermined reference waveform, or by analyzing the frequency of the waveform, the presence / absence of a defect, the location of the defect, the cause, etc. may be specified. Good.

DESCRIPTION OF SYMBOLS 10 Electric wire strip processing apparatus 12 Electric wire strip unit 14A, 14B Strip blade 16 Blade drive part 17A, 17B Blade support part 17Aa, 17Ba Screwing part 18 Screw part 19 Motor 40 Electric wire strip processing operation malfunction detection apparatus 42 Vibration detection part 50 Defect determination Processing unit 52a Comparison unit 52b Determination unit 55 External storage device 55a Defect detection program 55b Threshold 55c Continuity determination criterion 55d Periodicity determination criterion W Electric wire Wa Core wire Wa Coating

Claims (10)

An electric wire strip processing operation failure detection device that detects occurrence of a failure in operation of the strip blade when stripping the coating of the wire using a strip blade driven by a blade drive unit,
A vibration detection unit that detects vibration of at least one of the blade driving unit and the strip blade;
Based on the vibration detection signal input from the vibration detection unit, a failure determination processing unit that determines the occurrence of a failure in the wire strip processing operation;
An electric wire strip processing operation failure detection device comprising: A wire strip processing operation failure detection device according to claim 1,
The vibration detection unit is a wire strip processing operation failure detection device, which is a resonance type AE sensor having a resonance frequency within a range of 100 kHz to 300 kHz. A wire strip processing operation failure detection device according to claim 1 or claim 2,
The wire strip processing operation failure detection device, wherein the failure determination processing unit determines occurrence of a failure in the wire strip processing operation based on a magnitude of a vibration energy amount represented by the vibration detection signal. The wire strip processing operation failure detection device according to claim 3,
The defect determination processing unit identifies a defect occurrence period based on a vibration energy amount represented by the vibration detection signal, and identifies a defect that has occurred based on the occurrence state of the defect occurrence period. . The wire strip processing operation failure detection device according to claim 4,
The wire strip processing operation failure detection device, wherein the failure determination processing unit determines that a failure occurs in the operation of the strip blade when the failure occurrence period occurs continuously. The wire strip processing operation failure detection device according to claim 4 or 5,
The wire strip processing operation failure detection device, wherein the failure determination processing unit determines that a failure has occurred in a rotating mechanism of the blade driving unit when the failure occurrence period occurs periodically. It is an electric wire strip processing operation malfunction detection device given in any 1 paragraph of Claims 1-6,
A pair of strip blades that can be cut into the sheath of the wire;
A blade drive unit that moves the pair of strip blades closer and away from each other;
An electric wire strip processing operation failure detection device further comprising: It is an electric wire strip processing operation failure detection device according to claim 7,
The electric wire strip processing operation failure detection device, wherein the vibration detection unit is provided so as to contact at least one of the pair of strip blades. When stripping the coating of the electric wire using a strip blade driven by a blade driving unit, the method of detecting an electric wire strip processing operation defect that detects the occurrence of an operation defect of the strip blade,
(A) performing a process of cutting the strip blade into the electric wire;
(B) in the step (a), detecting a vibration of at least one of the blade driving unit and the strip blade;
(C) based on a vibration detection signal input from the vibration detection unit, determining the occurrence of a failure in the wire strip processing operation;
An electric wire strip processing operation failure detection method comprising: When stripping the coating of the electric wire using the strip blade driven by the blade driving unit, the vibration of at least one of the blade driving unit and the strip blade is detected, and the operation of the strip blade is based on the vibration detection signal. A wire strip processing operation failure detection program for detecting the occurrence of failure in the computer,
(A) comparing the vibration detection signal with a defect occurrence standard;
(B) Based on the comparison result in the step (A), determining the occurrence of defects in the wire strip processing operation;
Wire strip processing operation defect detection program for realizing