JP5205163B2 - Terminal crimping state pass / fail judgment device, terminal crimping processing device, terminal crimping state pass / fail judgment method, and terminal crimping state pass / fail judgment program - Google Patents

Description

  The present invention relates to a technique for determining pass / fail of a terminal crimping state when a terminal is crimped to an electric wire.

  As a method for detecting a defect in the terminal crimping state, there is a method disclosed in Patent Document 1. In Patent Document 1, the quality of the crimped state is determined by comparing the temporal change waveform of the pressure detected when the terminal is crimped with a predetermined reference waveform or the like.

JP-A 63-281071

  However, when the terminal crimping is performed continuously, it is difficult to make the surrounding vibration environment constant. For example, the influence of vibration generated during terminal crimping remains even at the next terminal crimping. This vibration also affects the pressure waveform detected during terminal crimping.

  For this reason, the pressure waveform detected at the time of terminal crimping can be observed as a pressure waveform having a different shape even in a crimped state to be identified as a non-defective product. As described above, since the pressure waveform is affected by the surrounding vibration environment, as described in Patent Document 1, it is difficult to accurately determine whether the pressure bonding is good or not according to the surrounding vibration environment only by comparing with a single reference. It becomes.

  In view of the above, an object of the present invention is to accurately determine whether or not the crimping is performed in consideration of the influence of the surrounding vibration environment as much as possible.

In order to solve the above-mentioned problem, the terminal crimping state pass / fail judgment device according to the first aspect performs terminal crimping pass / fail judgment for performing terminal crimping pass / fail judgment when the terminal crimping process for crimping a terminal to an electric wire is continuously performed. A pressure waveform input unit to which a pressure waveform detected along with terminal crimping is input; a storage unit that stores a plurality of crimping quality determination criteria; and one of the plurality of crimping quality determination criteria; A pass / fail discriminating unit that discriminates whether or not the terminal is crimped based on the pressure waveform, and the pass / fail discriminating unit is a continuous terminal according to a change in a surrounding vibration environment when the terminal crimping process is performed. In the middle of the crimping process, the criterion for determining whether or not the crimping is good is changed.

  A second aspect is a terminal crimping state pass / fail judgment device according to the first aspect, wherein the storage unit stores a plurality of reference waveforms as the plurality of crimp pass / fail judgment criteria, One of a plurality of reference waveforms is compared with the pressure waveform to determine whether the terminal is crimped.

A 3rd aspect is a terminal crimping | compression-bonding state quality determination apparatus which concerns on the 1st or 2nd aspect, Comprising : The said quality determination part processes and supplies the terminal supply mechanism part which supplies a terminal, and the edge part of an electric wire. According to the operation state of the wire processing mechanism section, the crimping pass / fail judgment criterion is changed according to the terminal crimping related operation.

A fourth aspect is a terminal crimping state determination device for determining whether a terminal is crimped or not when a terminal crimping process for crimping a terminal to an electric wire is continuously performed, and a pressure waveform detected along with terminal crimping Is determined based on the pressure waveform input unit, a storage unit for storing a plurality of crimping quality determination criteria, and one of the plurality of crimping quality determination criteria and the pressure waveform. A pass / fail discriminator, and the pass / fail discriminator is in the middle of a continuous terminal crimping process , between the first terminal crimping and the second and subsequent terminal crimps after the start of continuous terminal crimping. This is to change the criterion for determining whether or not the bonding is good.

  A 5th aspect is a terminal crimping | compression-bonding quality determination apparatus which concerns on a 4th aspect, Comprising: The said quality determination part has a terminal crimping interval based on the said pressure waveform input through the said pressure waveform input part more than predetermined period. When it is larger, it is determined that the first terminal crimping has been performed, and when the terminal crimping interval is smaller than a predetermined period, it is determined that the second and subsequent terminal crimping has been performed.

  A sixth aspect is provided with a pair of crimping dies for terminal crimping, a crimp driving unit that relatively moves the pair of crimping dies closer to and away from each other, and a pressure waveform accompanying the terminal crimping. The pressure detection part which detects this, and the terminal crimping | compression-bonding quality determination apparatus which concerns on any one of the 1st-5th aspect are provided.

A seventh aspect is a terminal crimping state determination method for determining whether or not a terminal is crimped when a terminal crimping process for crimping a terminal to an electric wire is continuously performed, and is detected along with (a) terminal crimping. The step of determining the crimping quality of the terminal based on the pressure waveform and the crimping quality judgment criterion, (b) the pressure waveform detected along with the terminal crimping, and the crimping quality judgment standard in the step (a). The step of determining whether or not the terminal is crimped based on the crimping criterion for the crimping is changed in the middle of the continuous terminal crimping process according to the fluctuation of the surrounding vibration environment when the terminal crimping process is performed. It is something to execute.

In the eighth aspect, when the terminal crimping process for crimping the terminal to the electric wire is continuously performed, the terminal crimping state determination for determining whether the terminal is crimped based on the pressure waveform detected along with the terminal crimping is performed. (A) a process for determining whether or not a terminal is crimped based on a pressure waveform and a criterion for determining whether or not the terminal is crimped, and (b) a process that is detected along with the terminal crimping. And a process for determining whether or not the terminal is crimped based on a pressure waveform and a criterion for determining whether or not the crimp is good in the step (a), and a peripheral vibration environment when performing the terminal crimping process. In accordance with the fluctuations, it is possible to realize a process that is changed in the middle of the continuous terminal crimping process.

  According to the first aspect, the pass / fail judgment unit changes the crimp pass / fail judgment criteria during the continuous terminal crimping process. For this reason, it is possible to perform the crimping pass / fail judgment using an appropriate crimp pass / fail judgment standard according to the fluctuation of the surrounding vibration environment, and to perform the crimping pass / fail judgment with high accuracy in consideration of the influence of the surrounding vibration environment as much as possible. it can.

  According to the second aspect, by using an appropriate reference waveform according to the fluctuation of the surrounding vibration environment, it is possible to accurately determine whether or not the crimping is performed in consideration of the influence of the surrounding vibration environment as much as possible.

  According to the third aspect, by determining the change timing of the crimping quality determination criterion according to the terminal crimping related operation, the crimping quality determination criterion can be changed at an appropriate timing according to the fluctuation of the surrounding vibration environment. .

  According to the fourth aspect, by changing the crimping pass / fail judgment criterion between the first terminal crimping and the second and subsequent terminal crimping after the start of continuous crimping, an appropriate response according to the fluctuation of the surrounding vibration environment At the timing, it is possible to change the criterion for determining whether or not the bonding is good.

  According to the fifth aspect, it is possible to change the crimping determination criterion at an appropriate timing according to the fluctuation in the vibration effect considering the vibration attenuation.

  According to the sixth aspect, it is possible to perform crimping quality determination using an appropriate crimping quality determination standard according to changes in the surrounding vibration environment, and accurately determine the bonding quality with consideration of the influence of the surrounding vibration environment as much as possible. It can be performed.

  According to the seventh aspect, it is possible to perform crimping quality determination using an appropriate crimping quality determination criterion according to changes in the surrounding vibration environment, and to accurately determine the bonding quality based on the influence of the surrounding vibration environment as much as possible. It can be performed.

  According to the eighth aspect, it is possible to perform crimping quality determination using an appropriate crimping quality determination standard according to changes in the surrounding vibration environment, and accurately determine the bonding quality with consideration of the influence of the surrounding vibration environment as much as possible. It can be performed.

  Hereinafter, the terminal crimping apparatus according to the embodiment will be described.

  FIG. 1 is a schematic front view showing a terminal crimping apparatus 10, and FIG. 2 is a schematic side view showing a terminal crimping mechanism apparatus 20.

  The terminal crimping apparatus 10 includes a terminal crimping mechanism device 20 and a terminal crimping state pass / fail discrimination device 30. The terminal crimping mechanism device 20 is a device that continuously performs a terminal crimping process for crimping the terminal 14 to the end of the electric wire 12, and the terminal crimping state pass / fail judgment device 30 is a device that judges the crimping quality of the terminal.

<1. Terminal crimping mechanism device>
The terminal crimping mechanism device 20 includes a substantially U-shaped support member 21 that is turned sideways, a pair of crimping dies 22 and 25, a crimping drive unit 26, and a pressure detection unit 24.

  The pair of crimping dies 22, 25 has a lower crimping die 22 and an upper crimping die 25, and the terminal 14 can be crimped between them.

  The lower crimping die 22 is mounted on the lower base portion 21 a of the support member 21 so as to protrude upward. A support base 22a is attached to the lower base portion 21a so as to be adjacent to the lower crimping die 22. And while the crimping | compression-bonding part 14a of the terminal 14 is mounted on the lower crimping | compression-bonding type | mold 22, the terminal 14 can be supported in mounting state in the state which mounted the other part of the terminal 14 on the support stand 22a. It is configured.

  In addition, a pressure transmission member 23 is disposed in the lower base portion 21 a and below the lower crimping die 22 in contact with the lower crimping die 22. A pressure detection unit 24 is disposed below the pressure transmission member 23 in contact with the pressure transmission member 23. And it is comprised so that the pressure which acts on the crimping | compression-bonding type | mold 22 of the lower side at the time of terminal crimping may be transmitted to the pressure detection part 24 via the pressure transmission member 23. FIG. The pressure detection unit 24 includes a sensor that outputs an electrical signal corresponding to pressure, such as a strain gauge, a piezoelectric element, or an optical fiber pressure sensor. When the pressure generated during terminal crimping is transmitted to the pressure detection unit 24 via the pressure transmission member 23, the pressure detection unit 24 is configured to output a pressure waveform corresponding to the pressure change as an electrical signal. Yes.

  The pressure detector 24 may be incorporated on the upper crimping die 25 side or on both sides of the pair of crimping die 22 and 25. In the latter case, a crimping pass / fail discrimination process described later may be performed on each of the pressure waveforms detected in each, or a crimp pass / fail discrimination process described later may be performed on the average waveform of each detected waveform. .

  The crimp driving unit 26 includes a toggle link mechanism, an air cylinder, a hydraulic cylinder, and the like, and is provided on the upper support portion 21 b of the support member 21. An upper crimping die 25 is supported on the crimping drive unit 26 so as to be lifted and lowered in a hanging posture. The upper crimping die 25 is moved toward and away from the lower crimping die 22 by driving the crimping drive unit 26. In addition, the crimping | compression-bonding drive part 26 should just be the structure which moves a pair of crimping | die crimping | die 22 and 25 relatively and apart.

  Further, the terminal crimping mechanism device 20 includes a terminal supply mechanism unit 28 that continuously supplies the plurality of terminals 14 to the lower crimping die 22, and the electric wire 12 is cut into a predetermined length, and ends thereof An electric wire processing mechanism 29 for continuously performing the process of peeling the part and disposing it in the crimping part 14a of the terminal 14 is incorporated. And it is comprised so that the terminal crimping process which crimps | bonds the terminal 14 to the electric wire 12 can be performed continuously. Since various configurations including known configurations can be applied to the terminal supply mechanism section 28 and the wire processing mechanism section 29, detailed description thereof will be omitted.

<2. Terminal crimping condition pass / fail judgment device>
FIG. 3 is a block diagram showing the terminal crimping state pass / fail discrimination device 30. The terminal crimping state pass / fail discrimination device 30 is electrically connected to the pressure detection unit 24 so that the pressure waveform detected by the pressure detection unit 24 can be input, and the terminal crimping pass / fail judgment is made based on the pressure waveform. Configured to do.

  More specifically, the terminal crimping state pass / fail judgment device 30 is configured by a general computer in which a CPU 32, an internal storage device 34, an external storage device 35, and the like are interconnected via a bus line 31. The internal storage device 34 includes a ROM that stores basic programs and the like, and a RAM that temporarily stores data, and the external storage device 35 is configured by a nonvolatile storage device such as a flash memory or a hard disk device. Yes. The external storage device 35 stores a discrimination program 35a for performing a crimping pass / fail discrimination process described later. The CPU 32 as the main control unit performs arithmetic processing in accordance with the determination program 35a, so that various functions such as a pass / fail determination unit for determining the pass / fail determination of the terminal 14 as described later are realized. The discrimination program 35a is normally stored in advance in the external storage device 35, but is provided in a state of being recorded on a recording medium such as a CD-ROM, DVD-ROM, flash memory, or the like. It may be provided by downloading from an external server through the Internet, and may be stored in the external storage device 35 in addition or exchange.

  The external storage device 35 stores a first reference waveform PWb1 and a second reference waveform PWb2 as a plurality of crimping quality determination criteria, and a reference crimping interval T2 is stored as a preset value. The quality determination process described later is performed with reference to the first reference waveform PWb1, the second reference waveform PWb2, and the reference crimping interval T2. The setting process of the first reference waveform PWb1 and the second reference waveform PWb2 will be described later. The reference crimping interval T2 is stored as a value input and set in advance through the input unit 38 described later.

  In the terminal crimping state pass / fail discrimination device 30, the pressure waveform input circuit unit 36, the signal output circuit unit 37, the input unit 38 and the display unit 39 are also connected to the bus line 31.

  The pressure waveform input circuit unit 36 is configured by an AD conversion circuit or the like. When the pressure waveform detected by the pressure detection unit 24 is input as an analog signal, the pressure waveform input circuit unit 36 is configured to convert the pressure waveform into a digital signal. . The pressure waveform converted into a digital signal by the pressure waveform input circuit unit 36 is sequentially stored in the internal storage device 34 or the external storage device 35, and used for a reference waveform generation process and a crimping pass / fail determination process described later.

  The signal output circuit unit 37 is an output circuit that outputs a control signal and the like to other devices under the control of the CPU 32. Here, as will be described later, an error stop signal and an operation permission signal for the terminal crimping mechanism device 20 are output via the signal output circuit unit 37 and given to the terminal crimping mechanism device 20.

  The input unit 38 includes various switches, a touch panel, and the like, and is configured to receive various instructions for the terminal crimping state pass / fail discrimination device 30 such as a reference waveform generation start instruction and a press pass / fail judgment processing start instruction.

  The display unit 39 includes a liquid crystal display device, a lamp, and the like, and is configured to be able to display various information such as a result of determining whether or not the terminal is crimped and a pressure waveform under the control of the CPU 32.

  Note that some or all of the functions performed by the terminal crimping state pass / fail judgment device 30 may be realized by hardware using a dedicated logic circuit or the like.

<3. Processing of terminal crimping state pass / fail judgment device>
The reference waveform generation process of the terminal crimping state pass / fail judgment device 30 and the crimp quality judgment process of the terminal 14 will be described.

<3.1. Reference waveform generation processing>
FIG. 4 is a flowchart showing the reference waveform generation process.

  First, a user or the like of this apparatus gives a terminal crimping start instruction to the terminal crimping mechanism apparatus 20 and gives a reference waveform generation start instruction to the terminal crimping state pass / fail judgment apparatus 30. Then, the pressure waveform detected by the pressure detection unit 24 is input through the pressure waveform input circuit unit 36 as pressure waveform information indicating the passage of time t and the change in the pressure P. As shown in FIG. 5, the waveforms at this time are the crimp waveforms PWS1 and PWS2 (hereinafter referred to as pressure waveform portions generated by the crimping as described above), in which a relatively large upward convex waveform is connected after a relatively small upward convex waveform. May be observed as a continuous waveform at intervals. In addition, since the said crimping waveform changes with kinds etc. of the terminal 14, it is not necessarily observed as a waveform shape as mentioned above.

  When receiving the reference waveform generation start instruction, the terminal crimping state pass / fail judgment device 30 samples the first crimping waveform PWS1 in a preset sampling period TS in step S1. The presence or absence of the crimp waveform PWS1 may be determined, for example, based on whether or not the pressure P is equal to or higher than a preset reference pressure value Pa (or whether or not it is greater than the reference pressure value Pa). As the predetermined reference pressure value Pa, for example, a value determined as a value of several tens of percent with respect to the pressure peak value of the crimping waveform based on past trial results can be used. Further, the sampling period TS is set as a period TS defined by the preceding period TSa and the subsequent period TSb, for example, with the time ta when the pressure P reaches a predetermined reference pressure value Pa as the sampling reference time ta. be able to. For the previous period TSa and the subsequent period TSb, values determined experimentally or empirically as periods in which a crimping waveform effective for the judgment of crimping quality can be used with reference to the sampling reference time ta. However, the presence / absence of the pressure waveform and the setting of the sampling period are not limited to the above example. For example, sampling may be performed within a certain pressure range, or sampling may be performed within a predetermined period in conjunction with the crimping operation in the terminal crimping mechanism device 20. However, by performing sampling according to the change in the pressure waveform, sampling can be performed without receiving an operation signal from the terminal crimping mechanism device 20, and the configuration can be simplified.

  After step S1, the terminal crimping state pass / fail discrimination device 30 samples the second crimping waveform PWS2 in step S2. The presence / absence of the crimp waveform PWS2 and the sampling period TS can be determined or set in the same manner as described above.

  The interval between the first terminal crimping and the second terminal crimping in the terminal crimping mechanism device 20, that is, the interval T1 between the first crimping waveform PWS1 and the second crimping waveform PWS2 is a predetermined period to be described later. It is set to be smaller than the reference crimping interval T2.

  After step S2, the terminal crimping state pass / fail discrimination device 30 sets the crimping waveform PWS1 sampled in step S1 to the first reference waveform PWb1 in step S3 and the second crimping waveform PWS2 sampled in step S2. The reference waveform PWb2 is set and stored in the external storage device 35, respectively. Thereafter, the reference waveform generation process is terminated.

  FIG. 6 is a diagram illustrating an example of a crimp waveform. In the figure, an example of the first crimping waveform PWS1 is indicated by a solid line, and an example of the second crimping waveform PWS2 is indicated by a broken line. As shown in the figure, it can be seen that the difference in unevenness is larger in the second crimp waveform PWS2 example than in the first crimp waveform PWS1 example. It is assumed that this is because the vibration effect at the first press bonding has an influence at the second press bonding. Therefore, as will be described later, even in actual continuous terminal crimping processing, regarding the first crimping after the processing is started, pass / fail judgment is performed using the first crimping waveform PWS1 as the reference waveform PWb1, and the second and subsequent times. With respect to the crimping, the pass / fail determination is performed using the second press-bonding waveform PWS2 as the reference waveform PWb1, so that the appropriate pass / fail determination can be performed based on the appropriate reference waveforms PWb1 and PWb2 according to the surrounding vibration environment.

  The first reference waveform PWb1 and the second reference waveform PWb are preferably used as crimping quality determination criteria for terminal processing conditions specified by the type of the terminal 14, the type of the electric wire 12, and the like. For this reason, when terminal processing conditions, such as the kind of terminal 14 and the kind of electric wire 12, change, it is preferable to sample another 1st reference waveform PWb1 and 2nd reference waveform PWb. Of course, when the change in the type of the terminal 14 and the type of the electric wire 12 is such a change that does not affect the pressure waveform to be detected or does not significantly affect it, the same first reference waveform PWb1 and second You may use 2 reference | standard waveform PWb as a crimping | crimped_quality determination criterion.

  The reference waveform generation process is not necessarily performed every time the terminal 14 is crimped. For example, when the first reference waveform PWb1 and the second reference waveform PWb2 are obtained for the specific terminal 14 and the specific electric wire 12 by the already performed reference waveform generation processing, the first reference waveform PWb1 and the second reference waveform PWb1 You may perform the crimping | crimped state determination of the terminal 14 mentioned later using 2 reference | standard waveform PWb2.

<3.2. Terminal crimping judgment process>
The terminal crimping state pass / fail judgment device 30 basically judges the crimping quality of the terminal 14 based on one of the first reference waveform PWb1 and the second reference waveform PWb and the pressure waveform, and continuously. During the terminal crimping process, a process of changing the first reference waveform PWb1 and the second reference waveform PWb used as a reference is executed.

  The crimping quality determination process for the terminal 14 will be described more specifically with reference to the flowchart shown in FIG.

  That is, a user or the like gives a terminal crimping start instruction to the terminal crimping mechanism device 20 and also gives a crimping pass / fail judgment processing start instruction to the terminal crimping state pass / fail judgment device 30. Then, the pressure waveform detected by the pressure detection unit 24 is input through the pressure waveform input circuit unit 36. As shown in FIG. 8, the pressure waveforms at this time are as follows: crimping waveforms PW (1), PW (2), PW (3)... PW (n−1), PW (n), PW (n + 1).・ ・ Is observed as a continuous waveform at intervals.

  When the terminal crimping state pass / fail judgment device 30 receives the crimping pass / fail judgment start instruction, if it is judged that there is a crimp waveform PW (N) (N is a natural number) in step S11, the crimping waveform PW (N) is sampled. Thereafter, the process proceeds to step S12. The presence / absence of the crimp waveform PW (N) and the sampling period may be determined or set as in the case of the reference waveform generation process.

  In step S12, it is determined whether or not the elapsed period TP from the previous crimping waveform acquisition is equal to or greater than a predetermined reference crimping interval T2 (or greater than the reference crimping interval T2). The elapsed period TP is a period obtained as the crimping interval of the terminals 14 and is, for example, a period obtained as follows.

  That is, since the crimping waveform PW (N) is sampled as described above, the sampling reference time ta is considered as a reference time for determining the elapsed time TP. That is, the difference in time ta between the temporally continuous crimping waveforms PW (N) is obtained as the elapsed period TP that is the crimping interval of the terminals 14. It should be noted that the elapsed period TP is set as T3 (a value satisfying T3> T2) at the time of starting crimping from the complete initial state, that is, when the actual value of the previous reference time ta is absent. Just do it.

  However, the elapsed period TP is not limited to the above example, and is based on a time difference at which the crimping waveform PW (N) exhibits a peak value of pressure, a difference in output time of signals indicating the crimping timing in the terminal crimping mechanism device 20, or the like. Can also be requested. However, by obtaining the elapsed period TP based on the pressure waveform, the elapsed period TP can be obtained without receiving an operation signal from the terminal crimping mechanism device 20, and the configuration can be simplified.

  Further, the reference crimping interval T2 is a time when the terminal 14 is continuously crimped and the vibration effect due to the previous crimping of the terminal 14 does not have a significant effect on the pressure waveform in the next crimping of the terminal 14. Yes, a value set experimentally or empirically.

  That is, in this step S12, when the elapsed period TP that is the crimping interval of the terminal 14 is equal to or greater than the reference crimping interval T2, it is determined that the first crimping of the terminal 14 has been performed, and the elapsed period TP is the reference crimping interval T2. It is determined that the second and subsequent terminal crimping has been performed in the continuous crimping operation of the terminal 14.

  If it is determined in step S12 that the elapsed period TP is greater than or equal to the predetermined reference crimping interval T2, the process proceeds to step S13. If it is determined that the elapsed period TP is not greater than or equal to the predetermined reference crimping interval T2, the process proceeds to step S16. .

  In step S13, the terminal crimping state pass / fail determination apparatus 30 executes a process of comparing the crimp waveform PW (N) sampled in step S11 with the first reference waveform PWb1. The comparison between the crimp waveform PW (N) and the first reference waveform PWb1 is, for example, a slope comparison in a predetermined time interval, a difference comparison between an upper limit value and a lower limit value in a predetermined time interval, a pressure peak value comparison, This is performed by calculating the degree of approximation (for example, calculating a correlation coefficient). Thereafter, the process proceeds to step S14.

  In step S14, the comparison result in step S13 is compared with a predetermined threshold value to determine whether the terminal 14 is good or not. If it is determined that the terminal 14 is good, the process proceeds to step S15. In step S15, the terminal crimping mechanism device 20 is instructed to continue production to perform terminal crimping, and then the process returns to step S11, and the subsequent sampling waveform PW (N) is sampled after step S11. Repeat the process. On the other hand, if it is determined in step S14 that it is defective, the process proceeds to step S18.

  In step S18, the display unit 39 displays that the display is defective, and gives a signal to the terminal crimping mechanism device 20 to stop the terminal crimping error. Thereby, the crimping process of the terminal 14 by the terminal crimping mechanism apparatus 20 is stopped temporarily. Thereafter, the process proceeds to step S19.

  In step S19, it is determined whether a confirmation reset instruction is input through the input unit 38 or the like. If it is determined that there is no input, the process in step S19 is repeated. If it is determined that there is an input, the process proceeds to step S15. That is, when the user recognizes a defect in crimping of the terminal 14 and eliminates the defective product, confirms the state of the terminal crimping mechanism device 20, etc., and inputs a confirmation reset instruction, the process proceeds from step S19 to step S15. The terminal crimping process is resumed.

  In step S16 when it is determined in step S12 that the elapsed period TP is not equal to or greater than the predetermined reference crimping interval T2, the terminal crimping state pass / fail discrimination device 30 determines the crimping waveform PW (N) sampled in step S11. And a process of comparing the second reference waveform PWb2. The comparison here can be performed in the same manner as in step S13. Thereafter, the process proceeds to step S17.

  In step S17, the quality of the terminal 14 is determined based on the comparison result in step S16. If it is determined that the terminal 14 is a non-defective product, the process proceeds to step S15 and terminal crimping is continued. On the other hand, if it is determined in step S17 that it is defective, the process proceeds to step S18. And it progresses to step S15 through step S19 from step S18, and after stopping terminal crimping, the terminal crimping process is restarted.

  In the discrimination process, the first terminal crimping after the start of the crimping of the continuous terminal 14 is judged using the first reference waveform PWb1, and the second and subsequent terminal crimping after the crimping of the continuous terminal 14 is started. Is determined by using the second reference waveform PWb2. That is, more specifically, the first reference waveform PWb1, which is a criterion for determining whether or not the crimping is performed, is performed during the continuous terminal crimping process, more specifically, between the first crimping and the second and subsequent crimping after the start of the continuous terminal crimping. The second reference waveform PWb2 is changed.

  The actual operation of the crimping pass / fail discrimination process of the terminal crimping state pass / fail discrimination device 30 will be described with reference to FIG.

  First, when the first crimping waveform PW (1) is sampled after the start of the crimping process of the continuous terminal 14, the pass / fail judgment is made by comparing the crimping waveform PW (1) with the first reference waveform PWb1. Done.

  Thereafter, when the crimping waveform PW (2) is sampled with an interval of an elapsed period TPa smaller than the reference crimping interval T2, the discrimination reference is changed from the first reference waveform PWb1 to the second reference waveform PWb2, and the crimping waveform. A pass / fail determination is made by comparing PW (2) with the second reference waveform PWb2.

  Subsequently, the crimping waveforms PW (3)... Are sequentially sampled at intervals of an elapsed period TPa which is also smaller than the reference crimping interval T2, and these are also compared with the second reference waveform PWb2 to determine whether the quality is good or bad. Done.

  When the crimping of the terminal 14 is resumed after the (n-1) th crimping is finished, the (n) -th crimping waveform PW (n) is sampled. In this case, the elapsed period TPb, which is the interval between the (n-1) th crimping waveform PW (n-1) and the (n) th crimping waveform PW (n), is longer by the period of the pause. The elapsed period TPb is assumed to be not less than the reference crimping interval T2.

  Then, the discrimination reference is changed again from the second reference waveform PWb2 to the first reference waveform PWb1, and the pass / fail discrimination is performed by comparing the crimp waveform PW (n) with the first reference waveform PWb1.

  Thereafter, when the crimping waveform PW (n + 1) is sampled with an interval of an elapsed period TPa smaller than the reference crimping interval T2, the discrimination reference is changed again from the first reference waveform PWb1 to the second reference waveform PWb2, and the crimping is performed. By comparing the waveform PW (n + 1) with the second reference waveform PWb2, the quality determination is performed, and the determination process is performed in the same manner.

  According to the terminal crimping state pass / fail judgment apparatus, terminal crimping apparatus, terminal crimping state pass / fail judgment method, and terminal crimping state pass / fail judgment program configured as described above, the crimping processing conditions such as the type of terminal 14 and the type of wire 12 are determined. Even in the same case, the first reference waveform PWb1 and the second reference waveform PWb2 as the crimping quality determination criteria are changed during the crimping process of the continuous terminal 14. For this reason, it is possible to determine whether or not the pressure bonding is good by using the first reference waveform PWb1 or the second reference waveform PWb2 which is an appropriate reference according to the fluctuation of the surrounding vibration environment. As a result, it is possible to determine the quality of the crimping with high accuracy by eliminating the influence of the surrounding vibration environment as much as possible.

  In particular, since the first reference waveform PWb1 and the second reference waveform PWb2 based on the crimping waveform sampled according to the actual fluctuation of the ambient vibration environment are used as the crimping pass / fail judgment criterion, the reference that appropriately reflects the surrounding vibration environment is used. Therefore, it is possible to accurately determine whether the crimping is good or bad.

  By the way, since vibration is generated by the terminal crimping, the influence of the vibration by the previous crimping is large in the second and subsequent times after the start of the crimping of the continuous terminal 14. Therefore, the first reference waveform PWb1 and the second reference waveform PWb2 that are the reference are changed between the first crimping of the terminal 14 after the start of the crimping of the continuous terminal 14 and the second and subsequent crimping of the terminal 14. Thus, the first reference waveform PWb1 and the second reference waveform PWb2 can be changed at an appropriate timing that is predicted to be a change in the surrounding vibration environment.

  In the above case, after the terminal 14 is usually crimped, the influence of vibration is large for a while, and after a certain amount of time has passed, the vibration is attenuated, so that the influence of vibration due to the crimping is reduced. Therefore, it is determined that the first crimping of the terminal 14 has been performed when the elapsed period TP that is the crimping interval of the terminal 14 is equal to or greater than the predetermined reference crimping interval T2, and the elapsed period TP is greater than the predetermined reference crimping interval T2. If it is determined that the terminal 14 has been crimped for the second time or later when it is small, the first reference waveform PWb1 and the second reference waveform PWb2 can be changed at a timing that appropriately considers the attenuation of the previous vibration effect. .

{Modifications}
In the above-described embodiment, when the terminal 14 is continuously crimped, the crimping quality determination criterion is changed between the first time after the start of crimping and the second and subsequent times, but this is not necessarily required. For example, separate crimping pass / fail judgment criteria are created according to the operation status (such as presence / absence of operation) of the terminal supply mechanism 28 of the terminal crimping mechanism device 20 and the operation status (presence / absence of operation) of the wire processing mechanism 29. In addition, the crimping quality determination criterion may be changed according to the operation status of the terminal supply mechanism 28 and the wire processing mechanism unit 29. In this case, signals indicating the operation status from the terminal supply mechanism 28 and the wire processing mechanism section 29 are input to the terminal crimping state pass / fail discrimination device 30, and the terminal crimping state pass / fail discrimination device 30 is based on the signal indicating the operation status. What is necessary is just to determine the timing which changes the crimping | crimping quality determination criteria.

  In addition, when it is predicted or observed that the continuous crimping waveform fluctuates periodically, the crimping quality determination criterion may be changed periodically.

  In short, the crimping quality determination criterion may be changed in connection with the operation of performing terminal crimping that affects the crimping quality determination criterion.

  Moreover, although the example which crimps | bonds the terminal 14 to the one end part of the electric wire 12 was demonstrated in the said embodiment, the structure which crimps | bonds a terminal to the both ends of an electric wire may be sufficient. In this case, regarding the crimping quality determination of the terminal 14 with respect to the one end portion of the electric wire 12, the crimping quality determination criterion may be changed according to the crimping operation state of the terminal 14 with respect to the other end portion of the electric wire 12.

  In the above description, the reference waveform based on the sampled crimping waveform is used as the criterion for determining whether or not the crimping is good, but this is not always necessary. The crimping quality determination criterion may be set as a reference value estimated according to each vibration environment condition, an estimated function curve, or the like.

  In addition, each structure demonstrated in the said embodiment and each modification can be suitably combined unless it mutually contradicts.

It is a schematic front view which shows the terminal crimping processing apparatus which concerns on embodiment. It is a schematic side view which shows a terminal crimping mechanism apparatus. It is a block diagram which shows a terminal crimping state quality determination apparatus. It is a flowchart which shows a reference | standard waveform generation process. It is a figure which shows the example of a crimping waveform. It is a figure which shows the 1st crimping waveform example and the 2nd crimping waveform example. It is a flowchart which shows the crimping | compression-bonding determination process of a terminal. It is a figure which shows the example of a crimping waveform which appears during a continuous terminal crimping process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Terminal crimping processing apparatus 12 Electric wire 14 Terminal 20 Terminal crimping mechanism apparatus 22, 25 Crimp type 24 Pressure detection part 26 Crimp drive part 30 Terminal crimping state pass / fail judgment apparatus 32 CPU
35 External storage device 35a Discriminating program 36 Pressure waveform input circuit section 38 Input section 39 Display section PWb1 First reference waveform PWb2 Second reference waveform T2 Reference crimping interval TP, TPa, TPb Elapsed period

Claims (8)

When the terminal crimping process for crimping the terminal to the electric wire is continuously performed, it is a terminal crimping state pass / fail judgment device that performs crimping judgment of the terminal,
A pressure waveform input unit to which a pressure waveform detected along with terminal crimping is input;
A storage unit for storing a plurality of crimping pass / fail judgment criteria;
Based on one of the plurality of crimping pass / fail judgment criteria and the pressure waveform, a pass / fail judgment unit that performs crimping judgment of the terminal,
With
The terminal crimping state pass / fail judgment device, wherein the pass / fail judgment unit changes the crimping judgment criterion in the middle of the continuous terminal crimping process according to a change in a surrounding vibration environment when the terminal crimping process is performed . The terminal crimping state quality determination device according to claim 1,
The storage unit stores a plurality of reference waveforms as the plurality of crimping quality determination criteria,
The device for determining whether or not the terminal is in a crimped state by comparing the pressure waveform with one of the plurality of reference waveforms. The terminal crimping state pass / fail discrimination device according to claim 1 or 2,
The pass / fail judgment unit changes the crimping pass / fail judgment criteria according to the operation status of the terminal supply mechanism unit for supplying the terminal and the wire processing mechanism unit for processing and supplying the end of the electric wire. apparatus. When the terminal crimping process for crimping the terminal to the electric wire is continuously performed, it is a terminal crimping state pass / fail judgment device that performs crimping judgment of the terminal,
A pressure waveform input unit to which a pressure waveform detected along with terminal crimping is input;
A storage unit for storing a plurality of crimping pass / fail judgment criteria;
Based on one of the plurality of crimping pass / fail judgment criteria and the pressure waveform, a pass / fail judgment unit that performs crimping judgment of the terminal,
With
The pass / fail judgment unit is in the middle of continuous terminal crimping processing, and changes the crimp pass / fail judgment criteria between the first terminal crimping and the second and subsequent terminal crimping after the start of the continuous terminal crimping, Terminal crimping state pass / fail discrimination device. The terminal crimping state pass / fail discrimination device according to claim 4,
The pass / fail judgment unit determines that the first terminal crimping has been performed when the terminal crimping interval based on the pressure waveform input through the pressure waveform input unit is greater than a predetermined period, and the terminal crimping interval is a predetermined period. A terminal crimping state pass / fail discrimination device that determines that the second and subsequent terminal crimping has been performed when the terminal crimping is smaller. A pair of crimping dies for terminal crimping;
A crimp driving unit that relatively moves the pair of crimping molds closer to and away from each other; and
A pressure detector provided in the pair of crimping molds to detect a pressure waveform associated with terminal crimping;
The terminal crimping state pass / fail discrimination device according to any one of claims 1 to 5,
A terminal crimping apparatus comprising: When the terminal crimping process for crimping the terminal to the electric wire is continuously performed, it is a terminal crimping state pass / fail judgment method for judging the crimping quality of the terminal,
(A) a step of determining whether or not the terminal is crimped based on a pressure waveform detected in connection with the terminal crimping and a criterion for determining whether or not the terminal is crimped;
(B) a step of determining whether or not the terminal is crimped based on a pressure waveform detected along with the terminal crimping and a crimping quality determination criterion different from the crimping quality determination criterion in the step (a);
The terminal crimping state pass / fail determination method is executed by changing the process in the middle of the continuous terminal crimping process according to the change in the surrounding vibration environment when the terminal crimping process is performed . A terminal crimping state pass / fail judgment program for determining whether or not a terminal is crimped based on a pressure waveform detected when the terminal is crimped when a terminal crimping process for crimping a terminal to an electric wire is continuously performed. In addition,
(A) a process for determining whether or not a terminal is crimped based on a pressure waveform detected along with terminal crimping and a crimping quality determination criterion;
(B) a process for determining whether or not a terminal is crimped based on a pressure waveform detected along with terminal crimping and a crimping quality determination criterion different from the crimping quality determination criterion in the step (a);
A terminal crimping state pass / fail judgment program for realizing a process of changing the process in the middle of a continuous terminal crimping process according to a change in the surrounding vibration environment when the terminal crimping process is performed .

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