JP4398923B2 - Defective crimping terminal detection method and terminal crimping apparatus - Google Patents

Description

  The present invention relates to a crimping failure terminal detection method and a terminal crimping device for detecting a crimping terminal mounting failure when a crimping terminal is mounted on a terminal of an insulated coated electric wire by a terminal crimping device.

Conventionally, when a crimp terminal is attached to the end of an insulated wire having a conductor and an insulation coating applied on the conductor, the crimp terminal is automatically attached using a terminal crimping device.
When a crimping terminal is automatically attached to the end of an insulation-coated electric wire by a terminal crimping device, there are several patterns of defective crimp terminal attachment. Therefore, in this type of terminal crimping apparatus, it is a major problem to detect a crimping failure of the crimping terminal and prevent a defective product from being mixed into a non-defective product.
Therefore, conventionally, detection of a crimp failure of a crimp terminal as in Patent Document 1 or Patent Document 2 has been performed.

In the case of Patent Document 1, a load sensor is attached to a portion (for example, a ram) to which a total load generated when a crimp terminal is crimped to an insulation-coated electric wire, and waveform data output from the load sensor is subjected to normal crimping. By comparing with the waveform data in the case of breakage, the crimping failure was detected.
On the other hand, in the case of Patent Document 2, a crimping portion for crimping a conductor crimping portion of a crimping terminal to a conductor of an insulation-coated electric wire, and an insulating coating crimping portion of the crimping terminal to the insulation coating of the insulating-coated wire. A load sensor is attached to each of the insulating coating pressure-bonding die pressing portions, and the crimp data is detected by comparing the waveform data output from the load sensor with the waveform data in the normal case.

JP-A 63-281071 Japanese Examined Patent Publication No. 7-11549

  However, in the case of detection of a crimp failure disclosed in Patent Document 1, since the entire reaction force (strain) is picked up by a single load sensor, there are cases where minor crimp failures or a plurality of crimp failures are mixed. In the case where only a slight difference is present in the distortion, it may be difficult to determine whether the distortion is normal.

On the other hand, in the case of detection of a crimping failure disclosed in Patent Document 2, the pressure bonding of the invention described in Patent Document 1 is performed by providing a load sensor for each of the conductor crimping stamping part and the insulating coating crimping stamping part. It can be expected to detect defects with higher accuracy than the defective terminal detection method.
However, the accuracy was still not sufficient.
For example, as shown in FIG. 9B, when several conductors 94 are spilled from the conductor crimping portion 95 of the crimp terminal 90, it is difficult to detect if the spilled number is very small.
In addition, as shown in FIG. 9D, in the case where the crimping failure occurs only on one side of the insulation coating crimping portion 93, the insulation coating crimping pressing portion temporarily crimps the insulation coating crimping portion 93. For this reason, there was a case where no clear abnormality was observed in the waveform data from the load sensor attached to the pressing portion for insulation coating pressure bonding.

  In view of these problems, an object of the present invention is to provide a crimping failure terminal detection method capable of detecting a crimping failure with higher accuracy and a terminal crimping device using this detection method.

In order to achieve the above object, the crimping failure terminal detection method according to claim 1 of the present invention includes a conductor crimping pressing portion for crimping a conductor crimping portion of a crimping terminal to a conductor of an insulation-coated wire, and insulation of the insulation-coated wire. When the crimping terminal is crimped to the insulation-coated electric wire by a terminal crimping device having an insulation-coated crimping pressing portion for crimping the insulation-coated crimping part of the crimping terminal to the coating, the crimping terminal is crimped to the insulation-coated electric wire. A method of detecting a defective crimp terminal for detecting a defect, wherein a total load generated when crimping the crimp terminal on the conductor crimping pressing portion, the insulating coating crimping pressing portion, and the insulating coated electric wire is applied. each separately attaching a load sensor to a portion, the output value of the waveform data of the load sensor attached to the conductor crimping dies pressing portion D1, output of the waveform data of the load sensor attached to the insulating coating crimping dies pressing portion ΔD = D3− (D1 + D2) where D2 is the value of D2 and the output value of the waveform data of the load sensor attached to the portion where the total load generated when the crimping terminal is crimped to the insulated wire is D3 The calculation result is compared with the calculation result obtained by calculating and processing the waveform data obtained when the crimp terminal is normally crimped to the insulation-coated electric wire, and the crimp failure of the crimp terminal to the insulation-coated wire is detected. .

Moreover, the terminal crimping device according to claim 2 of the present invention is a conductor crimping pressing part for crimping a conductor crimping portion of a crimping terminal to a conductor of an insulation coated electric wire having a conductor and an insulation coating applied on the conductor; A terminal crimping device for crimping an insulation coating crimping portion of the crimp terminal to the insulation coating of the insulation coated wire, the terminal crimping device comprising the conductor crimping stamping portion, A load sensor is separately attached to each portion to which the total load generated when the crimp terminal is crimped to the insulation-coated crimping pressing portion and the insulation-coated electric wire, and the load obtained by these three load sensors. Compare the calculation result obtained by processing the waveform data with the calculation result obtained by performing the calculation processing on the waveform data obtained when the crimp terminal is normally crimped to the insulated wire, and crimp the terminal to the insulated wire. Further have a detecting section for detecting a crimping failure, the detection unit, the conductor crimping dies pressing portion waveform data of the load sensor attached to D1, the waveform of the load sensor attached to the insulating coating crimping dies pressing portion When the data is D2, and the waveform data of the load sensor attached to the portion to which the total load generated when the crimp terminal is crimped to the insulation-coated wire is D3, the calculation result ΔD = D3− (D1 + D2 ) Is detected in comparison with that obtained during normal crimping of the crimping terminal with respect to the insulated coated electric wire .

  According to the crimping failure detection method or terminal crimping apparatus of the present invention as described above, in the terminal crimping apparatus, the conductor crimping pressing part for crimping the conductor crimping part of the crimping terminal to the conductor of the insulation coated electric wire, insulation The insulation coating crimping pressing part for crimping the insulation coating crimp part of the crimp terminal to the coating, and the part to which the total load generated when crimping the crimp terminal to the insulation coated wire is applied, specifically, for example, the ram part By attaching load sensors separately at three convenient locations, not only the waveform data itself obtained from these three load sensors, but also operations such as adding these waveform data to each other or taking the difference between them. The calculation result obtained by processing can be compared with that obtained when normal crimping is performed. For this reason, it is possible to detect the crimping failure in the conductor crimping portion and the insulation coating crimping portion with a higher accuracy including the minor crimping failure that could not be detected in the past.

  As described above, according to the present invention, it is possible to provide a crimping failure terminal detection method capable of detecting a crimping failure more accurately and a terminal crimping device using this detection method.

  In the following, an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1, 3, 4 and 5, the characteristic parts of the terminal crimping apparatus 1 of this embodiment are a conductor crimping pressing part 5a, an insulation coating crimping pressing part 5b, and a crimping. Load sensors 10b, 10c, and 10a are installed at three convenient locations of the ram 6 that can capture all the loads that are generated at times. In the waveform determination circuit 20 (detection unit) as an example of the detection unit of the present invention, the three locations Load waveform data is collected from all the load sensors 10a to 10c, and if necessary, the waveform data is processed and processed to obtain a calculation result, which is compared with the calculation result of the waveform data in the normal case without crimping failure. Thus, it is in the point of detecting a crimp failure.

Below, the terminal crimping apparatus 1 and the crimping defective terminal detection method of a present Example are demonstrated using FIGS.
FIG. 1 shows a terminal crimping device 1, which is capable of moving up and down above a press frame 2, a terminal crimping table 3 fixed on the press frame 2, and the terminal crimping table 3. The provided applicator 4, the terminal pressing die 5 that is attached to the lower end of the applicator 4 and presses the crimp terminal 90, the lower end is fixed to the upper end of the applicator 4, and the press frame 2 is punched. The ram 6 is slidably inserted in the slanted hole 2b, a toggle device 7 for moving the ram 6 up and down, a terminal distribution lever 8, and the like.

The toggle device 7 mainly has an upper link 71, a lower link 72, a toggle 73 and a flywheel 74. One end of each of the upper link 71, the lower link 72 and the toggle 73 is pivoted by a shaft 75. It is supported.
On the other hand, the other end of the upper link 71 is pivotally supported on the fixed portion 76, the other end of the lower link 72 is on the upper end of the ram 6 and the other end of the toggle 73 is pivotally supported on the peripheral portion of the flywheel 74. Has been.
The flywheel 74 is rotated by a drive motor (not shown), and the rotation is transmitted to the ram 6 via the toggle 73, the upper link 71, and the lower link 72, and the ram 6 reciprocates up and down.

The terminal distributing lever 8 is pivotally supported at its upper end on a shaft 81 and is rotatably supported at the other end of an arm 83 with one end fixed to the upper end of the applicator 4 in a drive groove 82 formed at the center. Are engaged via a pin or the like, and a collar 84 is attached to the lower end.
As a result, the terminal distribution lever 8 swings left and right by the vertical movement of the applicator 4 to drive the collar 84 left and right, and from a number of crimp terminals 90 connected by the carrier 80 as shown in FIG. The crimp terminals 90 are conveyed one by one to the terminal crimp base 3.

  As shown in FIGS. 1, 4, and 5, a conductor crimping pressing portion 5 a and an insulation coating crimping pressing portion 5 b are attached to the lower end of the applicator 4 that moves up and down together with the ram 6. On the other hand, a punch 96 for separating the crimp terminals 90 in order from the conveyed carrier 80 is mounted in the terminal crimp base 3. As a result, with a single descent of the applicator 4, the crimping terminal 90 is separated, the insulation coating crimping pressing portion 5b is used to crimp the insulation coating crimping portion 93 as shown in FIG. The conductor crimping portion 95 is simultaneously crimped by the portion 5a.

Here, in the toggle device 7, when the shaft 75 is pushed with the toggle 73, the upper link 71 and the lower link 72 are substantially aligned in the vertical direction, and the pushing force P in the vertical direction increases.
Assuming that the lengths of the links 71 and 72 are equal, θ is the angle formed by the vertical direction and the lower link 72, and F is the pressing force of the toggle 73, the force by which the lower link 72 pushes the ram 6 is P = F / (2 tan θ).
This force P becomes a force (hereinafter referred to as a crimping force) for crimping the crimp terminal 90 to the terminal of the insulation-coated electric wire on the terminal crimping table 3. Therefore, the ram 6 receives the reaction force -P of this force P when the terminal is crimped. Therefore, the load sensor 10a is attached to the ram 6 and the change of the reaction force -P is detected to determine whether or not the crimping force to the crimping terminal 90 is normal.

Here, the ram 6 is formed at a predetermined position with a column 6a having a diameter smaller than that of the ram 6 by cutting a part of the ram 6 in a direction perpendicular to the axial direction over the entire circumference as shown in FIG. A sensor 10a is arranged. The load sensor 10a is composed of a bridge circuit having two sensors 11a and 11b. The sensor 11a is mounted on the front surface of the pillar 6a, and the sensor 11b is mounted 180 degrees opposite to the sensor 11a, that is, on the back surface (not shown). Is done.
As shown in FIG. 3, the sensor 11a includes, for example, two load cells 12a and 13a that are mounted orthogonally to each other. Specifically, one load cell 12a is stuck in the axial direction of the pillar 6a, and the other load cell 13a is stuck at right angles to the axis of the pillar 6a. The load cell 12a has a resistance value corresponding to the strain in the axial direction of the column 6a, and the load cell 13a has a resistance value corresponding to the strain in the direction perpendicular to the axis. Similarly, the sensor 11b includes load cells 12b and 13b.

  In the load sensor 10a, each load cell is connected to a bridge circuit as shown in FIG. In FIG. 6, the load cells 12b and 13b indicate the load cells attached to the back surface of the pillar 6a as described above. The contacts a and b of the load cells 12a and 12b and 13a and 13b constituting the bridge circuit are connected to a power source 15. The contact points c and d of the load cells 12a and 13a, 12b and 13b are connected to terminals 10ax and 10ay of the load sensor 10a.

The load sensor 10a thus configured detects the distortion generated in the column 6a of the ram 6 for each individual crimp terminal 90 during terminal crimping, and detects the reaction force −P described above.
Incidentally, a part of the ram 6 is cut out to form a thin column 6a, and the load sensor 10a is attached to this part in order to easily generate distortion due to the reaction force -P of the crimping force and to increase detection sensitivity. If there is no problem in terms of sensitivity, it is not necessary to cut out a part of the ram 6 to form the small-diameter column 6a.

In addition, as shown in FIGS. 4 and 5, both the conductor crimping die 5a and the insulation coating crimping die 5b of the terminal crimping die 5 can be detected with higher accuracy. The load sensors 10b and 10c are mounted separately. In these load sensors 10b and 10c, similarly to the load sensor 10a, the load cells 31a and 32a (two load cells are similarly attached to the back side) and the load cells 36a and 37a (two load cells are similarly provided to the back side) Are attached so as to be orthogonal to each other.
Each of the load sensors 10b and 10c also has a bridge circuit similar to that shown in FIG.

As shown in FIG. 7 in detail, the waveform determination circuit 20 as an example of the detection unit of the present embodiment includes amplifiers 21a, 21b, 21c, analog-digital converters (hereinafter referred to as A / D converters) 22a, 22b, 22c, comparators 23a, 23b, and 23c, memories 24a, 24b, and 24c, and a central processing unit (hereinafter referred to as CPU) 25, and data such as a difference between a weight sensor 10a and weight sensors 10b and 10c described later. And a memory 26 for storage.
The terminals 10ax and 10ay of the load sensor 10a described above are connected to the input terminal of the amplifier 21a of the wave type determination circuit 20, as shown in FIG. The output terminal of the amplifier 21a is connected to each input terminal of the A / D converter 22a and the comparator 23a. The output terminal of the comparator 23a is connected to the trigger input terminal of the A / D converter 22a, and the output terminal of the A / D converter 22a is connected to the input terminal of the memory 24a.
Similarly, the load sensors 10b and 10c are connected to the amplifiers 21b and 21c. The amplifiers 21b and 21c are further connected to the A / D converters 22b and 22c and the comparators 23b and 23c, respectively, and the A / D converter 22b, 22c is connected to memories 24b and 24c, respectively. These memories 24a, 24b, and 24c are further connected to the CPU 25.

The operation of this terminal crimping apparatus 1 will be described below.
The toggle device 7 transmits the rotation of the flywheel 74 to the ram 6 and the applicator 4 via the toggle 73, the upper link 71, and the lower link 72, and reciprocates them.
On the other hand, according to the reciprocating motion of the applicator 4, the terminal distribution lever 8 swings left and right to operate the collar 84, and one crimp terminal 90 is formed from the plurality of crimp terminals 90 held on the carrier 80 at a predetermined interval. Each of them is conveyed onto the terminal crimping table 3 and the insulation coating crimping part and the conductor crimping part of the crimping terminal 90 are respectively positioned at predetermined positions.

When the insulation-coated electric wire, which has undergone so-called terminal treatment, with the insulation coating at the end of the insulation-coated electric wire removed, is positioned on the crimping terminal 90 positioned on the terminal crimping table 3, it is mounted on the lower end of the applicator 4 The terminal pressing die pressing portion 5 is lowered to crimp the insulation coating crimping portion and the conductor crimping portion of the crimping terminal 90, and the insulation coating and conductor of the insulation coated wire are respectively crimped to the crimping terminal 90. Connecting.
When the crimp terminal 90 is crimped and attached to the insulated sheathed electric wire, the reaction force is applied to the ram 6 and the column 6a is distorted. The load sensor 10a detects this distortion and generates a corresponding electric signal V.

After the electric signal V generated by the load sensor 10a is amplified by the amplifier 21a, it is sent to the A / D converter 22a and the comparator 23a. The comparator 23a compares the amplified electric signal V with the reference signal Vs, and if the difference between the electric signal V and the reference signal Vs is larger than the allowable range, a level trigger is applied to the A / D converter 22a. When the trigger signal Pt is applied, the A / D converter 22a starts sampling, samples the waveform data of the input electric signal V, performs A / D conversion, and converts the waveform data in time series. Store in the memory 24a.
Similar processing is performed for the load sensors 10b and 10c via the amplifiers 21b and 21c, the A / D converters 22b and 22c, and the comparators 23b and 23c, respectively, and the output waveform data is time-sequentially. Store in the memories 24b and 24c.

  The memories 24a, 24b, and 24c store signal waveforms in a normal crimp state, that is, waveform data obtained when normal crimping is performed, and the CPU 25 performs crimping of the normal waveform data and the crimp terminal 90. Then, it is determined whether or not the crimping terminal 90 is normally crimped by comparing the waveform data sent sequentially. If there is a predetermined difference or more in the comparison result, it is determined that there is an abnormality, and an abnormality determination signal Vo is output.

By the way, as described above, when the load sensor 10a and the load sensors 10b and 10c are used alone, a slight crimp failure, specifically, the aforementioned crimp failure shown in FIGS. 9B and 9D is detected. Was difficult.
Therefore, in the present embodiment, the load sensor 10a and the load sensors 10b and 10c that have not been provided at the same time in the same terminal crimping device 1 are provided in the same terminal crimping device 1 as shown in FIG. By processing the waveform data with each other in 20 CPUs 25, it is possible to more reliably detect minor crimping defects, which were difficult only by the determination based on the waveform data from the load sensors 10a, 10b, and 10c as in the past. I made it possible.
This point will be described more specifically below.

FIG. 8 shows output waveforms of the three load sensors 10a to 10c, respectively. FIG. 8A shows waveform data output from the load sensor 10b attached to the conductor crimping pressing part 5a shown in FIG. 4, and FIG. 8B shows the load sensor 10c attached to the insulating cover crimping pressing part 5b. FIG. 8C shows the waveform data of the load sensor 10a attached to the column 6a of the ram 6 shown in FIG.
These waveforms are input to the waveform determination circuit 20 shown in FIG.

For example, in FIG. 8A, G1 is a waveform when the crimping of the conductor crimping portion 95 is normally performed as shown in FIG. 9A. On the other hand, as shown in FIG. 9B, N1 indicated by a one-dot chain line is a waveform when a small number of about two conductors 94 are detached from the conductor crimping portion 95, and is based on G1 described above. Also appears on the lower side.
In general, as the number of conductors 94 that are removed from the conductor crimping portion 95 increases, N1 appears below G1.
On the other hand, the waveform appears above the normal waveform G1 as in N2, which means that the conductor crimping portion 95 is not only the conductor 94, but also other things, for example, chips generated when the crimping terminal 90 is separated from the carrier 80. In some cases, the conductor 94 may be crimped together with the conductor 94.
In any case, the crimping failure in the conductor crimping portion 95 can be detected from the waveform of the load sensor 10b attached to the conductor crimping pressing portion 5a.

In FIG. 8B, G2 is a waveform when the insulation coating crimping portion 93 is normally crimped as shown in FIG. 9A. On the other hand, as shown in FIG. 9C, N3 shows a waveform indicating a state in which only the conductor 94 is crimped not only in the conductor crimping portion 95 but also in the insulating coating crimping portion 93 and the insulating coating 92 cannot be crimped. That is, since the outer diameter portion of the conductor 94 whose outer diameter is smaller than the outer diameter of the insulation coating is crimped, N3 appears below G2, which is a normal waveform.
As described above, if the waveform from the load sensor 10c attached to the insulating coating crimping pressing portion 5b is checked, the crimping failure in the normal insulating coating crimping portion 93 can be accurately detected.

In FIG. 8C, G3 is a waveform when each crimping of the insulation coating crimping portion 93 and the conductor crimping portion 94 is normally performed as shown in FIG. 9A. On the other hand, N4 is a case where one of the crimping portions of the insulation coating crimping portion 93 causes a crimping failure, as shown in FIG. 9 (d).
As described above, in this case, the conductor 94 is normally crimped by the conductor crimping portion 95, but one crimping terminal of the insulation coating crimping portion 93 is not normally crimped.
In such a case, since the conductor crimping part 95 normally grasps the conductor 94, no abnormality appears in the load sensor 10b attached to the conductor crimping pressing part 5a. That is, it cannot be detected by the load sensor 10b attached to the conductor pressing die pressing portion 5a.

In addition, since the load sensor 10c of the insulating coating crimping portion 93 is temporarily crimped, it is not easy to read the abnormality from the waveform of the load sensor 10c installed on the insulating coating crimping pressing portion 5b.
On the other hand, according to the load sensor 10a provided on the column 6a of the ram 6, in the case of the crimping failure as shown in FIG. 9D, the waveform N4 is obtained during normal crimping as shown in FIG. The present inventors have found that the value appears larger than the appearing waveform G3.

  The reason why the waveform corresponding to FIG. 9D appears in the load sensor 10a installed on the column 6a of the ram 6 as described above is that, for example, in the case of FIG. Due to the balance being lost, the insulating coating pressure-bonding pressing portion 5b is slightly tilted in the axial direction. As a result, in the applicator 4 and the ram 6, there is a sliding resistance between the guiding portions. It is estimated that this occurs because G3 <N4 appears in the load sensor 10a attached to the column 6a of the ram 6.

However, since the waveform in the load sensor 10a attached to the column 6a of the ram 6 includes the load in the conductor crimping pressing part 5a and the insulation coating crimping pressing part 5b, the waveform alone in the load sensor 10a is included. Thus, it is difficult to accurately detect a crimping failure.
Therefore, in order to detect the defect as shown in FIG. 9D more reliably, in this embodiment, the output value of the waveform of the load sensor 10b of the conductor crimping pressing part 5a is set to D1, and the insulation coating pressing stamping part. When the output value of the waveform of the load sensor 10c of 5b is D2, and the output value of the waveform of the load sensor 10a of the column 6a of the ram 6 is D3, the CPU 25 of the waveform determination circuit 20 uses the difference value ΔD = D3- (D1 The calculation result of + D2) is calculated, and this is constantly monitored.
Thus, by monitoring the calculation result of ΔD, it is possible to detect a change in sliding resistance with higher accuracy, and it is possible to detect a crimping failure that could not be detected in the past.

More specifically, if ΔD is seen as described above, the variation within the allowable range of the normal value itself of the conductor crimping pressing part 5a and the insulating coating crimping pressing part 5b is offset. .DELTA.D only shows the difference between the load for separating the crimp terminal 90 from the so-called carrier 80 and the sliding resistance.
Therefore, the variation in sliding resistance can be grasped more finely. Specifically, the value of the sliding resistance varies because, for example, as shown in FIG. 9D, the balance of the insulating coating crimping pressing portion 5b is lost due to poor crimping or as shown in FIG. 9B. This is a case where the core wire is spilled and the balance of the conductor crimping pressing portion 5a is lost. In such a case, a change in the sliding resistance appears, so that it is possible to detect a crimp failure.
Further, with respect to the crimping failure in the insulating coating, a change may appear in the load for separating the crimping terminal 90 from the carrier 80. Therefore, by monitoring ΔD, the crimping failure in the insulating coating can be detected more accurately.

As described above, according to the present embodiment, the load sensors 10a to 10c are separately attached to the ram 6, the conductor pressing die pressing portion 5a, and the insulating coating pressing die pressing portion 5b, respectively. The calculation result ΔD obtained by calculating and processing the waveform data of the load obtained from 10c is compared with the calculation result obtained by calculating and processing the waveform data obtained when the crimping terminal 90 is normally crimped to the insulation-coated electric wire. By detecting the crimping failure of the crimping terminal 90, it is possible to detect a minor crimping failure that could not be detected so far.
Further, as can be seen from the above-described embodiment, the failure mode can be determined from the combination of the waveforms of the plurality of load sensors 10a to 10c and the pattern of the calculation results obtained by processing them mutually. become. Therefore, it becomes possible to analyze the frequency of occurrence of the crimping failure for each failure mode, and there is an advantage that it becomes easier to take countermeasures for the subsequent crimping failure.

In this embodiment, the load sensors 10a to 10c are mounted on the ram 6, the conductor pressing die pressing portion 5a, and the insulation coating pressing die pressing portion 5b. However, as another embodiment, the conductor pressing die pressing portion 5a, Instead of attaching a weight sensor to the insulating coating crimping pressing part 5b, the conductor pressing mold part 5a and the insulating coating crimping pressing part 5b are respectively paired with the pressing part side, that is, the terminal crimping table 3 A load sensor may be attached to the conductor pressing die pressing portion 50a and the insulating coating pressing die pressing portion 50b provided on the side.
Specifically, as shown in FIG. 10 (a), a load sensor 10b comprising load cells 31a and 32a (31b and 32b on the back surface) may be attached to the conductor pressing die pressing portion 50a. A load sensor 51 such as a piezoelectric element may be attached to the lower end of the pressing portion 50a. Similarly, the load sensor 10c is also mounted on the insulation coating crimping pressing part 50b as shown in FIG.

In this embodiment, an example using a load cell which is one of strain sensors as the load sensor 10 is shown. However, other than this, a load-electric conversion element such as a piezoelectric conversion element, a magnetoresistive element or a capacitance element is used. Can also be used.
In this embodiment, the load sensor 10a is attached to the ram 6. However, even if the load sensor 10a is attached to other locations as long as the entire load generated when the crimp terminal is crimped to the insulation-coated electric wire is applied. Good.
Furthermore, in this embodiment, the waveforms obtained by the load sensors 10a to 10c were processed by ΔD = D3− (D1 + D2). However, depending on the configuration of the terminal crimping apparatus 1 and the mode of the terminal crimping method, etc. The arithmetic processing method may be changed as appropriate.

  As described above, according to the crimping failure terminal detection method and the terminal crimping device of the present invention, it is possible to detect the crimping failure with higher accuracy.

It is a front view which shows one Example of the terminal crimping apparatus of this invention. It is a partial top view of the crimp terminal with a carrier supplied to the terminal crimping apparatus shown in FIG. It is an enlarged front view of the ram part of the terminal crimping apparatus shown in FIG. It is a side view of the press part for conductor crimping and the press part for insulation coating crimping in the terminal crimping apparatus shown in FIG. FIG. 5 is a partially enlarged front view of the conductor crimping pressing portion and the insulating coating crimping pressing portion shown in FIG. 4. It is a bridge circuit of the load sensor with which the terminal crimping apparatus of FIG. 1 was mounted | worn. It is a block diagram which shows typically the detection part in the terminal crimping apparatus of FIG. 1 is a waveform obtained by each load sensor of the terminal crimping apparatus shown in FIG. 1, wherein (a) is a waveform obtained from a load sensor attached to a conductor crimping stamping portion, and (b) is an insulating coating crimping stamping portion. (C) is a graph showing a waveform obtained from a load sensor attached to a portion to which a total load is applied, respectively. It is a top view which shows the various states of the crimp terminal with which the terminal crimping apparatus was mounted | worn with the terminal of the insulation coating electric wire. The other Example of this invention is shown, (a) is a front view of the press part for conductor crimping installed in the terminal crimping stand side, (b) is a front view of the press part for insulation coating crimping is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal crimping apparatus 3 Terminal crimping stand 4 Applicator 5a Conductor crimping stamping part 5b Insulation coating crimping stamping part 6 Ram 7 Toggle device 10 Load sensor 11 Sensor 31, 32, 36, 37 Load cell 50a Conductor crimping stamping 50b Insulation coating crimping pressing part 90 Crimp terminal 92 Insulation coating 93 Insulation coating crimping part 94 Conductor 95 Conductor crimping part

Claims (2)

A conductor crimping pressing part for crimping the conductor crimping portion of the crimping terminal to the conductor of the insulation coated electric wire; and an insulation coating crimping pressing part for crimping the insulating coating crimping part of the crimping terminal to the insulation coating of the insulating coating electric wire; A crimping failure terminal detection method for detecting a crimping failure of the crimping terminal to the insulation-coated wire when the crimping terminal is crimped to the insulation-coated wire by a terminal crimping device having a conductor crimping part, A load sensor is separately attached to each of the insulation-coated crimping pressing portion and a portion to which a total load generated when the crimping terminal is crimped to the insulating-coated electric wire is applied, and the load is attached to the conductor crimping pressing portion. The output value of the waveform data of the sensor is D1, the output value of the waveform data of the load sensor attached to the insulation coating crimping pressing part is D2, and all the values generated when the crimp terminal is crimped to the insulation coated electric wire. The output value of the waveform data of the load sensor attached to the portion where the heavy is applied is D3, obtained △ D = D3-a (D1 + D2) operation result during the normal crimping of the crimp terminal to said insulated wire A method of detecting a crimping failure terminal, comprising: comparing a calculation result obtained by processing the waveform data and detecting a crimping failure of the crimping terminal to the insulated coated electric wire. A crimping portion for crimping a conductor crimping portion of a crimping terminal to a conductor of an insulation-coated electric wire having a conductor and an insulating coating applied on the conductor; and an insulation coating of the crimping terminal on the insulation coating of the insulating-coated wire A terminal crimping device having an insulation coating crimping pressing portion for crimping the crimping portion, wherein the terminal crimping device includes the conductor crimping pressing portion, the insulation coating crimping pressing portion, and the insulation coated electric wire. A weight sensor is separately attached to each portion where the total load generated when crimping the crimp terminal is crimped on, and the calculation result obtained by computing the waveform data of the load obtained by these three load sensors compared to the calculation result of calculation processing with each other waveform data obtained during the normal crimping of the crimp terminal for electric wire, further have a detecting section for detecting a crimp failure of the crimp terminal to insulated wire, before The detection unit has D1 as the waveform data of the load sensor attached to the conductor pressing die pressing portion, D2 as the waveform data of the load sensor attached to the insulating coating pressing die pressing portion, and the crimp terminal to the insulation coated electric wire. When the waveform data of the load sensor attached to the portion to which the total load generated during crimping is applied is D3, the calculation result ΔD = D3− (D1 + D2) is the normality of the crimp terminal with respect to the insulated wire. A terminal crimping device which detects a crimp failure compared with that obtained at the time of crimping.

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