CN1297044C - Detection method for terminal crimping state - Google Patents
Detection method for terminal crimping state Download PDFInfo
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- CN1297044C CN1297044C CNB021225443A CN02122544A CN1297044C CN 1297044 C CN1297044 C CN 1297044C CN B021225443 A CNB021225443 A CN B021225443A CN 02122544 A CN02122544 A CN 02122544A CN 1297044 C CN1297044 C CN 1297044C
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Abstract
In a terminal crimped state testing method, in step S1, a reference waveform is created on the basis of a load when a terminal in a good crimped state is obtained, and the reference waveform is divided into plural reference waveform segments to set singular points. In step S2, the reference waveform segments containing singular points of the segments are integrated. In step S3, a characteristic waveform is created on the basis of the load when a crimping terminal to be tested is obtained. The characteristic waveform thus created is divided into plural sample waveform segments and the waveform segments corresponding to the reference waveform segments are integrated. In step S4, the integrated values of the reference waveform segments are compared with those of the sample waveform segments, thereby deciding whether the crimped state of the crimping terminal is good or not. In this configuration, the terminal crimped state can be stably tested, the defectiveness is precisely detected, and the time taken for testing can be shortened.
Description
Technical field
The present invention relates to a kind of terminal crimping equipment, it is used for making a line that has terminals, this line that has terminals can be formed a wire harness, the present invention especially relates to a kind of method of testing of terminal crimping state, is used for being tested by terminal crimping equipment the crimped status of terminals.
Background technology
For terminals are attached on the wire, use a terminal crimping equipment traditionally.For electric wire, before being attached to terminals on the electric wire, remove coating layer portion, for example its end is with the core at exposed distal ends place.That is to say that electric wire is subjected to the scraping operation.Above-mentioned terminals are used for the core calking leg of the core that calking exposes and the electric wire calking leg that is used for the calking electric wire for each coating layer portion is provided with one.
Traditionally, terminals are crimped on the electric wire by this way, i.e. core calking leg and electric wire calking leg are by the calking of terminal crimping equipment.The situation that might take place is in the crimping process, the crimping condition of poor can occur.For the bad situation of the terminal crimping that detects crimping, used a kind of bad crimping checkout equipment.
This equipment is by signature waveform and a reference waveform to obtaining by some characteristic values of time sequential sampling in the crimping step, and promptly the signature waveform that obtains from the good electric wire of terminals is in advance made comparisons, and whether test the electric wire that has terminals bad.This is based on such fact, and the characteristic value (load) during promptly unusual crimping changes more in a different manner with normal crimping, that is to say that the indicatrix of acquisition is different with reference waveform.
JP-A-185457 discloses the example of a bad crimping checkout equipment.This bad crimping checkout equipment is by making comparisons to the integrated value of integrated value in the time of sampling indicatrix and the reference waveform that obtains when having the normal crimping of electric wire of terminals, and whether test the electric wire that has terminals good.
Yet according to bad degree, there is difference in various degree in waveform between reference waveform and the signature waveform.For example, if electric wire is not swiped and the calking of coating layer portion core calking leg in the position that requires, will there be bigger difference between signature waveform of Huo Deing and the reference waveform so.Further, during the core otch core calking leg calking of a scraping position, will there be bigger difference between signature waveform of Huo Deing and the reference waveform so.Under these undesirable level condition with higher, whether the crimped status of the terminals of crimping is good will judge easily.Yet, when having less difference between reference waveform and the signature waveform, will be difficult to judge whether the crimping line is good.
In the disclosed bad crimping detection method of JP-A-185457, the serious bad degree that integrated value is produced than big-difference can easily detect.Yet signature waveform is compared with reference waveform, at crimping initial time height, will be difficult to produce difference on the integrated value in low bad degree of termination time.This will make and be difficult to judge whether crimped electric wire is good.
The crimped status of butt joint line end whether good judgement is to make in the step of terminal crimping to the line.This requires to shorten the time that is used for operating.
As mentioned above, terminals are provided with core calking leg and electric wire calking leg.These legs are by the calking simultaneously of terminal crimping equipment.Therefore, if bad crimping takes place, will be difficult to differentiate a singular point.
Summary of the invention
An object of the present invention is to provide a kind of terminal crimping state checkout equipment, it can judge stably whether crimped status is good, positively detects small undesirable level, shortens the time that needs of judging.
According to the present invention, a kind of method is provided, it is based on the waveform of some characteristic values of obtaining in the process of terminal crimping to the core of a wire, test the crimped status of terminals, it comprises step: obtain a reference waveform the signature waveform during from normal crimping terminals, reference waveform is divided into many first reference waveform fragments; A signature waveform that obtains when terminals to be tested of crimping are to electric wire is divided into the corresponding fragment of those fragments on many and the reference waveform; With some the first reference waveform fragments on the reference waveform and some waveform segments on the signature waveform is that the basis judges whether the crimped status of terminals is good.
According to said method, because the part with the signature waveform that is divided into some waveform segments is the crimped status that terminals are tested on the basis, therefore can judge stably whether the crimped status of terminals is good, thereby accurately detect the situation of bad crimping.Incidentally, this Partial Feature waveform that is used for judging preferably, should be according to the crimped status different zone of the good value difference of indicating characteristic significantly whether.
Judge based on the waveform segment that is divided of a part of signature waveform whether crimped status is good, this has shortened the time that needs of judging.Incidentally, signature waveform has preferably shown the load that is applied to terminals when crimping operation or the process terminals distortion in the compression bonding apparatus displacement that is used for crimping.Be used for judging crimped status whether preferably select according to terminals and electric wire by good reference waveform fragment and sample waveform fragment.
In said method, preferably, the singular point of reference waveform obtains on the basis of reference waveform increment in advance; These first reference waveform fragments comprise these singular points.
According to said method, because a part of reference waveform fragment that is used to judge comprises singular point, then under the situation of such terminals, promptly, whether good according to crimped status, the load value on it a singular point and near variation, just can more accurately detect the situation of bad crimping.Incidentally, a part of signature waveform that is used to judge, preferably, being characteristic value changes a violent zone according to crimped status is whether good.
These singular points preferably, are some such points, that is: in by the process of terminal crimping equipment crimping with their distortion, they are brought to the point when being in contact with one another together to this on the terminals of crimping to the calking leg; This of the terminals of crimping begins to contact with core to the calking leg and the point of load when beginning to rise; In the process of calking core, the point of load when " rising " becomes " decline "; Load reaches peak value thereby the point can not still apply the time.
In said method, preferably, the singular point of reference waveform obtains on the basis of reference waveform increment in advance; The first reference waveform fragment is between these singular points.
According to said method, because a part of reference waveform fragment that is used to judge is between these singular points, then under the situation of such terminals, promptly, distortion is the degree of (or difficulty) easily, just the load value on it changes between these singular points according to whether crimped status is good, just can determine the situation of bad crimping accurately, definitely.Incidentally, a part of signature waveform that is used to judge, preferably, being characteristic value changes a violent zone according to crimped status is whether good.Further, in the crimping operation of terminals, terminals mainly are out of shape between these singular points.
These singular points preferably, are some such points, that is: in by the process of terminal crimping equipment crimping with their distortion, they are brought to the point when being in contact with one another together to this on the terminals of crimping to the calking leg; Some when this of the terminals of crimping begins to contact with core to the calking leg; Some when load begins to rise; In the process of calking core, the point of load increment when " rising " becomes " decline "; Load reaches the point of peak value because of can not still apply the time.
According to the present invention, also provide a kind of method, it is based on the waveform of some characteristic values of obtaining in the process of terminal crimping to the core of a wire, test the crimped status of terminals, it is characterized in that comprising step: obtain a reference waveform the signature waveform during from normal crimping terminals; Increment with reference waveform is some singular points that the basis obtains it; Obtain the second reference waveform fragment that some comprise these singular points; Obtain second waveform segment that some comprise the point corresponding with these singular points, in the signature waveform that this second waveform segment has obtained when being crimped onto on the electric wire when terminals to be tested; With these second reference waveform fragments and these second waveform segments is that the basis judges whether the crimped status of terminals is good.
According to said method, the part of these that are used to the decision making second reference waveform fragment comprises some singular points, and these second waveform segments of signature waveform to be tested comprise the fragment that some are corresponding with these singular points.Whether good based on the crimped status that these second reference waveform fragments and these second sample waveform fragments are judged terminals.Therefore, load value thereon these singular points and near whether under the situation of the good terminals that change, can more accurately detect the situation of bad crimping according to crimped status.Incidentally, a part of signature waveform that is used to judge, preferably, being characteristic value changes a violent zone according to crimped status is whether good.
Based on these second reference waveform fragments, i.e. the part of reference waveform and the second sample waveform fragment, promptly the part of signature waveform is judged crimped status.This has shortened the time that needs of judging.
Incidentally, signature waveform has preferably shown the load that is applied to terminals when crimping operation or the process terminals distortion in the compression bonding apparatus displacement that is used for crimping.These singular points preferably, are some such points, that is: in by the process of terminal crimping equipment crimping with their distortion, they are brought to the point when being in contact with one another together to this on the terminals of crimping to the calking leg; This of the terminals of crimping begins to contact with core to the calking leg and the point of load when beginning to rise; In the process of calking core, the point of load increment when " rising " becomes " decline "; Load reaches peak value thereby the point can not still apply the time.
In said method, preferably, to be reference waveform increments be point maximum or when being zero to these singular points.
According to said method, the reference waveform increment is some such points for these singular points maximum or when being zero, that is: in by the process of terminal crimping equipment crimping with their distortion, they are brought to the point when being in contact with one another together to this on the terminals of crimping to the calking leg; This of the terminals of crimping begins to contact with core to the calking leg and the point of load when beginning to rise; In the process of calking core, the point of load increment when " rising " becomes " decline "; Load reaches peak value thereby the point can not still apply the time.This allows to detect more accurately, more definitely the situation of bad crimping.
According to the present invention, also provide a kind of method, it tests the crimped status of terminals based on the waveform of some characteristic values of obtaining in the process of terminal crimping to the core of a wire, it is characterized in that comprising step:
From the signature waveform when the normal crimping terminals, obtain a reference waveform, obtain some fixed reference feature values at the place of the even time interval of reference waveform; The place of the even time interval of the signature waveform that has obtained when terminals to be tested have been crimped onto on the electric wire obtains some characteristic values; With these fixed reference feature values and these characteristic values is that the basis judges whether the crimped status of terminals is good.
According to said method, be the crimped status that terminals are judged on the basis owing to locate these characteristic values with the even time interval of signature waveform, therefore can stably judge the crimped status of terminals, thereby allow more accurately to judge the situation of bad crimping.
Because locating these characteristic values with the even time interval of signature waveform is that crimped status is judged on the basis, therefore the time that is used for judging can shorten.Incidentally, signature waveform is preferably at crimping operation or is applied to the load of terminals when being used for terminals distortion in the process of compression bonding apparatus displacement of crimping.
In said method, preferably, electric wire has one deck coating to be coated on the core, terminals have some calking legs to come the calking core, when these calking leg calking coatings and core, from waveform, obtain one first bad waveform, and from reference waveform and this first bad waveform, obtain one first singular point in these singular points.
According to said method, when these calking leg calking coatings and core, obtain first singular point the reference waveform during from the first bad waveform and normal crimping.This allows to define definitely first singular point.
In said method, preferably, first singular point is defined as, along with the passage of crimping operation time, and the point the when characteristic value of the first bad waveform surpasses reference waveform.
According to said method, the point the when characteristic value that first singular point is defined as the first bad waveform surpasses reference waveform.This allows to define definitely first singular point.
In said method, preferably, core is wrapped up into a branch of conductor and is formed by many; Terminals have some to be used for the calking leg of calking core; When these these conductors of calking leg calking, these number of conductors are lacked during than the normal crimping of terminals, obtain one second bad waveform from signature waveform; And
From reference waveform and this second bad waveform, obtain one second singular point.
According to said method, when these these conductors of calking leg calking, these number of conductors are lacked during than the normal crimping of terminals, and the reference waveform during by one second bad waveform and normal crimping defines second singular point.This allows to define definitely second singular point.
In said method, preferably, second singular point is defined as, along with the passage of crimping operation time, and the point the when characteristic value of the first bad waveform drops under the reference waveform.This allows to define definitely second singular point.
Below in conjunction with accompanying drawing above-mentioned and other purpose and feature of the present invention are described more clearly.
Description of drawings
Fig. 1 is the front view of a terminal crimping equipment, and the method that is used to test terminal crimping state of first execution mode is applied to this terminal crimping equipment according to the present invention;
Fig. 2 is the end view of the terminal crimping equipment shown in Fig. 1;
Fig. 3 shows the view of a pressure sensor attached to the state on first execution mode;
Fig. 4 is a block diagram that is used for detecting the equipment of crimping undesirable level in first execution mode;
Fig. 5 A and 5B have shown a reference waveform in first execution mode, the figure of increment waveform, some singular points and some first reference waveform fragments;
Fig. 6 A is the profile that shows the process of Press Plier of crimping, anvil, a pair of core calking leg 50 and a core to 6E;
Fig. 7 A and 7B have shown reference waveform and corresponding to the figure of the relation between some signature waveforms of different defective modes;
Fig. 8 be according to first execution mode judge the crimped status process the flow chart of an example;
Fig. 9 is the figure that has shown a reference waveform, some singular points and some second reference waveform fragments in second execution mode;
Figure 10 A and 10B be shown in second execution mode reference waveform and corresponding to the figure of the relation between some signature waveforms of different defective modes;
Figure 11 A and 11B are the figure that has shown a reference waveform, some singular points and some second reference waveform fragments in the 3rd execution mode;
Figure 12 A and 12B be shown in the 3rd execution mode reference waveform and corresponding to the figure of the relation between some signature waveforms of different defective modes;
Figure 13 A and 13B are the views that has shown a reference waveform in the 4th execution mode;
Figure 14 A and 14B be shown in the 3rd execution mode reference waveform and corresponding to the figure of the relation between some signature waveforms of different defective modes;
Figure 15 is a perspective view that uses terminal crimping equipment that the terminals of one wire and a crimping are attached together mutually;
To be an explanation obtain the view of the another kind of technology of a singular point A in the 3rd execution mode at first to Figure 16;
To be an explanation obtain the view of the another kind of technology of a singular point B in the 3rd execution mode at first to Figure 17.
Embodiment
Referring now to Fig. 1 to 8 and 15, provide the explanation of first execution mode of the present invention.Fig. 1 is a front view of inventing the terminal crimping equipment that is applied to.Fig. 2 is the end view of the terminal crimping equipment shown in Fig. 1.A terminal crimping equipment 200 shown in Fig. 1 and 2 is used for the terminals 51 of a crimping are crimped onto on the wire 61, as shown in figure 15.
Electric wire 61 comprises that a conductive cores 60 and one deck are coated in the insulating coating 62 on the conductive cores 60.Core 60 is a branch of a plurality of leads, and its cross section is circular.These leads in the core 60 are made with conducting metal, as copper, copper alloy, aluminum or aluminum alloy etc.The synthetic resin of coating 62 usefulness insulation is made.Before the terminals 51 with a crimping were crimped onto on the electric wire 61, part was removed the coating of electric wire 61, made core 60 parts expose.
Form the terminals 51 of crimping by the metallic plate of a crooked conduction.The terminals 51 of crimping are recessed ends, and it has a columniform electric contact piece 53 (back description).The terminals 51 of crimping comprise a wire connecting part that will be connected to electric wire 61 52, the electric contact piece 53 and the diapire 54 that wire connecting part 52 and electric wire contact 53 are coupled together that will be connected to other terminals metal device.
Wire connecting part 52 comprises a pair of electric wire calking leg 55 and a pair of core calking leg 50.This erectly extends out to the both sides of electric wire leg 55 from diapire 54.This to electric wire calking leg 55 further to diapire 54 bendings, with the coating 62 of electric wire 61 be clipped in its self and diapire 54 in the middle of.Like this, this to 55 calkings of electric wire calking leg the coating of electric wire 61.
This erectly extends out to the both sides of core calking leg 50 from diapire 54.This further to diapire 54 bendings, is clipped in its self and diapire 54 centres with the core 60 that exposes to core calking leg 50.Like this, this to 50 calkings of core calking leg core 60.Terminal crimping equipment 200 is used for these calking legs 50 and 55 to diapire 54 bendings, and the terminals 51 of crimping are crimped onto on the electric wire 61.In Fig. 1, the support 1 of terminal crimping equipment 200 comprises a base plate 2 and at the side plate 3,3 on both sides.
A servomotor 4 of having equipped a decelerator 5 is fixed on the top Background Region of two side plates 3,3.A wheel disc 7 that a cam pin (bent axle) 8 is arranged axially is provided around the output shaft 6 of decelerator 5.A slide block 9 rotatably is attached on the cam pin 8.Slide block 9 is slidably mounted between the seat 10 and 10a that is attached on the ram 11.During rotation roulette 7, slide block 9 along continuous straight runs between these seats 10 and 10a slides, and ram 11 moves in the vertical direction.
In Fig. 1, terminals supply equipment of reference number 18 expressions with known configuration.This terminals supply equipment 18 comprises that one is used for support and connection becomes terminals guide rail 19, terminals press 20, terminals carrier arm that a terminals delivery supporting plate 21 is arranged 22, the fork 23 that is used for transfer arm 22 etc. of terminals 51 of the crimping of chain (not shown) on an end.
Connected an input unit 33 on the drive unit 32.This input unit 33 can be imported reference data through transforming, as size, the crimp height of the standard (or size) of the terminals 51 of crimping, corresponding electric wire 61, be applied to the load (electric current) on the servomotor 4.On the output shaft (not shown) of an encoder 31 attached to servomotor 4.Based on its revolution, can detect the position of Press Plier 14 and this positional information is fed back to drive unit 32.
Fig. 4 is the block diagram of the bad crimping checkout equipment 300 in the present embodiment.Bad crimping checkout equipment 300 comprises that an amplifier that the output of pressure sensor 100 is amplified 41, one will convert the A/D converter 42 of a digital voltage data, input unit 43, CPU44, ROM45, RAM46, display unit 47 and a communication interface 48 from the analog voltage signal that amplifier 41 produces to.
Input unit 43, CPU44, ROM45, RAM46, display unit 47 and communication interface 48 have been formed a microcomputer.Control operation in the service area executive control program among the CPU44 use RAM46, this control program is stored among the ROM45.
Especially, from the data of A/D converter 42, they are corresponding with the load value that obtains by pressure sensor, are used for sampling as characteristic value.CPU44 is that executable operations is come on the basis with the characteristic value of such sampling, and execution is created the process an of reference waveform 71 (shown in Fig. 5 and other figure), reference waveform 71 is divided into the process of the process of some reference waveform fragments, the process that detects the singular point on the reference waveform 71, the process with reference waveform 72a, 72b, 72c and 72d (describing in the back) integration, the process of importing a threshold value and an acceptable scope, the bad crimping of detection etc.Consequent these results show on display unit 47.
When the terminals 51 of crimping were crimped, by the load data that pressure sensor 100 obtains, promptly characteristic value can obtain, thereby had obtained the signature waveform 71 shown in Fig. 5 A.Signature waveform 71 has been represented load variation as time passes.Waveform shown in Fig. 5 A is the waveform of crimping when normally realizing.When crimping normally realizes, obtained a large amount of waveforms, they are stored among the RAM46 with the form of regulation.Incidentally, signature waveform 71 is called reference waveform 71 hereinafter.
As long as determined numerical data in the change-over period of a regulation, A/D converter 42 just produces data.Thereby the CPU44 characteristic value of can sampling in a time series is on the time shaft of this time sequence bit in the time limit that produces above-mentioned data.Reference waveform (signature waveform) 71 can be used as time series data and is stored among the RAM46.The a large amount of signature waveform data that produce when crimping is normally finished are averaged, and produce the data of reference waveform 71 in RAM46.
In the following description, word " signature waveform " use is normally finished with undesired in crimping and is finished under two kinds of situations.Word " reference waveform " finger pressure connects the signature waveform that produces when normally finishing.
In case the reference waveform 71 shown in Fig. 5 A has obtained, CPU44 just obtains the characteristic value increment of each unit time on the basis of the data of reference waveform 71, thereby produces the data of increment waveform 73.
Based on the data of increment waveform 73, these extreme values or zero intersect (position on the time shaft) position and can detect.These location definitions are singular point.In the example that in Fig. 5 B, illustrates, there are four some A, B, C and D to be defined as singular point.Except these four points, the point of expression increment extreme value also is positioned at these positions.As following description in the one-period of crimping process, these four points are special points, and know their apparent position in advance, make it possible to extract them.
Singular point A, B, C and D be the expression reference waveform 71 a maximal increment point, they neighbor point or represent the point of a zero increment and their neighbor point.
Fig. 6 A relates to the profile of the crimping process of a pair of calking leg 50 on the terminals 51 of a Press Plier 14, anvil 17, crimping and core 60 to 6E.Fig. 6 A has shown state at four singular point A, B, C and D place respectively to 6D.Fig. 6 E shown be right after the beginning crimping before the time state.Four singular point A, B, C and D are the points as describing below.Incidentally, it should be noted first singular point of definition during singular point A respective rights requires, second singular point of definition during singular point B respective rights requires.
Point A: as Fig. 6 A explanation, this on the terminals 51 of crimping is crimped core calking leg 50 in the process of top R (sweep) distortion of pincers, and they are brought to together and are in contact with one another.
Point B: as Fig. 6 B explanation, 50 beginnings contact with core 60 this on the terminals 51 of crimping to core calking leg, and active force (load) begins to rise.
Point C: as Fig. 6 C explanation, in by this process to core calking leg 50 calking cores 60 on the terminals 51 of crimping, the increment of active force (load) becomes " decline " from " rising ".
Point D: as Fig. 6 D explanation, core 60 by this to the 50 complete calkings of core calking leg, active force (load) reaches peak value.
Need not illustrate that the data of reference waveform 71 and increment waveform 73 can be handled as the time series data on the same time shaft, as the signature waveform data.Further, the position of these singular points can be used as the time limit storage, and this time limit is relevant with these time series datas.
CPU44 is divided into many fragments with reference waveform 71, and with the fragment that comprises top singular point A, B, C and D in these many fragments as reference waveform segment 72a, 72b, 72c and 72d, they have drawn shade.Based on the signature waveform of each reference waveform fragment 72a, 72b, 72c and 72d, can confirm whether crimped status is normal.In illustrated example, reference waveform 71 was located to be divided for 20 waveform segments in the even time interval.
To each reference waveform fragment 72a, 72b, 72c and 72d, when having discerned bad crimping, CPU44 calculates the dash area area as shown in Figure 5 of each reference waveform fragment 72a, 72b, 72c and 72d in advance when producing reference waveform 71 and defining singular point A, B, C and D.
When crimping had the electric wire 61 of terminals 51 of crimping to be tested thereon, CPU44 produced a signature waveform 81 (being marked by chain-dotted line) and above-mentioned reference waveform 71 in Fig. 7.As reference waveform 71, CPU44 is divided into many fragments with signature waveform 81, and the area of calculating and the corresponding waveform segment 82a of reference waveform fragment 72a, 72b, 72c and 72d, 82b, 82c and 82d.
After this, CPU44 calculates the area discrepancy (shadow representation of difference among Fig. 7 A and the 7B) between reference waveform fragment 72a, 72b, 72c and 72d and waveform segment 82a, 82b, 82c and the 82d respectively.If one of them difference has surpassed the threshold value of a regulation, can judge that so the crimped status of terminals of crimping is bad.If all difference all in the threshold range of regulation, can judge that so the crimped status of terminals of crimping is good.
In this way, if each fragment that comprises singular point A, B, C and D is decision making, can easily distinguish normal crimping (excellent product) and unusual crimping (faulty goods) so mutually.Under the situation in conjunction with coating 62 unusual crimping, as finding out from Fig. 7 A, between an A and B, B and C, signature waveform 81 is than reference waveform 71 height, and between a C and D, signature waveform 81 is lower than reference waveform 71.
Compare, core 60 the scraping position cut or the unusual crimping situation of line quantity not sufficient under, as from Fig. 7 B, finding out, between an A and B, signature waveform 81 equates that with reference waveform 71 between B and C, some C and D, signature waveform 81 is lower than reference waveform 71.
Like this, because each comprises that the signature waveform of the fragment of singular point A, B, C and D all clearly shows the feature of each defective, therefore can improve the ability of the bad crimping of identification by the research signature waveform.
Referring now to the flow chart among Fig. 8, whether good an explanation to the crimped status of the terminals of judging crimping process will be provided.
In step S1, be crimped onto on the wire 61 by the terminals 51 of terminal crimping equipment 200 with crimping.Repeatedly produce the electric wire 61 of terminals 51, thereby set up reference waveform 71 with well compressed crimping thereon.
In step S2, reference waveform 71 is divided into many waveform segments by CPU44.CPU44 or an operating operation person are provided with singular point A, B, C and D.CPU44 is respectively to comprising reference waveform fragment 72a, 72b, 72c and the 72d integration of singular point A, B, C and D.
In step S3, the terminals 51 of crimping to be tested are crimped onto on the electric wire 61.As reference waveform 71, on electric wire 61 crimping the signature waveform 81 that obtains during the terminals 51 of crimping also be divided into waveform segment.Be integrated with the corresponding waveform segment 82a of reference waveform fragment 72a, 72b, 72c and 72d, 82b, 82c and 82d.
In step S4, the integrated value (area) of reference waveform fragment 72a, 72b, 72c and 72d respectively with the integrated value (area) of waveform segment 82a, 82b, 82c and 82d relatively.If the difference between them has surpassed a threshold value, can judge that so electric wire in issue is a bad product, if the difference between them does not surpass this threshold value, can judge that so electric wire in issue is an excellent product.
According to this execution mode, because with the signature waveform that is divided into many waveform segments is the crimped status that the terminals 51 of crimping are judged on the basis, therefore can stably judge the crimped status of the terminals 51 of crimping, thereby make it possible to accurately detect the situation of bad crimping.
On the terminals 51 of crimping this is crimped core calking leg 50 in the process of pincers 14 R (sweep) distortion, and to be this be brought to point when being in contact with one another together to core calking leg 50 to singular point A.Some when load value of generation began to rise when singular point B was this to core calking leg 50 beginnings contact with core 60.Singular point C is in the process of calking core 60, the point of the increment of load when " rising " becomes " decline ".Singular point D is the point of load when reaching peak value (not imposed load).Whether good for the crimped status that the terminals 51 of judging crimping are crimped onto on the electric wire 61, used the reference waveform fragment 72a, 72b, 72c and the 72d that comprise singular point A, B, C and D.Therefore, when the terminals 51 of crimping are crimped, load according to the crimping situation whether well singular point A, B, C and D and near can change, thereby make it possible to determine accurately, definitely the situation of bad crimping.
Because waveform segment 82a, 82b, 82c and 82d with the signature waveform 81 that is divided into many fragments are the basic test crimped status, therefore the time that is used for judging can shorten.
Referring now to Fig. 9 and 10, provided the explanation of second execution mode of the present invention.Similarly reference number has been represented similar symbol.
In this execution mode, at CPU44 the reference waveform 71 that produces is divided into some fragments, after singular point A, B, C and D were set, its position between a B and C was provided with a reference waveform fragment 72e, and the position between a C and D is provided with the reference partial waveform 72f of another fragment.CPU44 calculates the area of reference waveform 72e and 72f.
For judging whether crimped status is good, as reference waveform 71, the signature waveform 81 (being marked by chain-dotted line in Figure 10) of acquisition was divided into some waveform segments when the terminals 51 that will work as crimping were crimped onto on the electric wire 61.With waveform segment 82e and 82f waveform segment 72e and area discrepancy 72f between (Figure 10 dash area) corresponding with those is that the basis judges whether crimped status is good.In Figure 10 A, chain-dotted line has been represented unusual crimping (insulated combination), and its floating coat 62 is combined.In Figure 10 B, chain-dotted line has been represented unusual crimping (shortage core), and its SMIS 60 is cut in the scraping position or the negligible amounts of the line of core 60.
In this execution mode, be that the basis judges whether the crimped status of terminals is good with waveform segment 82e and 82f also, this waveform segment 82e and 82f are parts that is divided into the signature waveform 81 of many fragments.Because this reason, the time that is used for judging can shorten.
On the terminals 51 of crimping this is crimped core calking leg 50 in the process of pincers 14 R (sweep) distortion, and to be this be brought to point when being in contact with one another together to core calking leg 50 to singular point A.Some when load value of generation began to rise when singular point B was this to core calking leg 50 beginnings contact with core 60.Singular point C is in the process of calking core 60, the point of the increment of load when " rising " becomes " decline ".Singular point D is the point of load when reaching peak value (not imposed load).Whether good for the crimped status that the terminals 51 of judging crimping are crimped onto on the electric wire 61, used the reference waveform fragment 72a, 72b, 72c and the 72d that comprise singular point A, B, C and D.Therefore, when the terminals 51 of crimping are crimped, load according to the crimping situation whether well singular point A, B, C and D and near can change, thereby make it possible to determine accurately, definitely the situation of bad crimping.
Further, when the terminals 51 of crimping were crimped, the terminals 51 of crimping may be out of shape between singular point A, B, C and D.In this case, easily (or difficulty) degree of distortion, load just is according to crimped status good variation the whether.Under this mode, if load changes between singular point A, B, C and D, then crimped status is judged by the area of the fragment of the signature waveform between singular point A, B, C and D, thereby can detect the situation of bad crimping accurately, definitely.
Referring now to Figure 11 and 12, provided the explanation of the 3rd execution mode of the present invention.In Figure 11 and 12, similarly reference symbol has been represented the similar portions in first and second execution mode.
In this execution mode, different with first and second execution mode is that after CPU44 produced reference waveform 71, it was not divided into many waveform segments with reference waveform 71.Identical with first execution mode is that CPU44 is provided with singular point A, B, C and D from reference waveform 71, shown in Figure 11 B.Time T A, TB, TC and the TD of passage in the time of can obtaining from the beginning crimping.Area in the time period Δ T before and after each lapse of time TA, TB on the reference waveform 71, TC and the TD is set up as the second reference waveform fragment 74a, 74b, 74c and 74d.The area separately of these second reference waveform fragments 74a, 74b, 74c and 74d is calculated.
For the crimped status of judging terminals whether good, based on lapse of time TA, TB, TC and Td and time period Δ T, the second waveform segment 84a, 84b, 84c and 84d on the signature waveform 81 (in Figure 12, marking) that obtains when the terminals 51 of crimping are crimped onto on the electric wire 61, to obtain by chain-dotted line.These second waveform segments 84a, 84b, 84c and 84d are corresponding with these second reference waveform fragments 74a, 74b, 74c and 74d respectively.These second waveform segments 84a, 84b, 84c and 84d have comprised the zone corresponding with singular point A, B, C and D.
With the difference (Figure 12 A dash area) between these second waveform segments 84a, 84b, 84c and 84d and these reference waveform fragments 74a, 74b, 74c and the 74d is that the basis judges whether crimped status is good.When judging, if all difference all in the threshold range of a regulation, judges that so electric wire in issue is an excellent product.If one of them difference has surpassed the threshold value of regulation, judge that so electric wire in issue is a bad product.
Incidentally, in Figure 12 A, chain-dotted line has been represented unusual crimping (insulated combination), and its floating coat 62 is combined.In Figure 12 B, chain-dotted line has been represented unusual crimping (shortage core), and its SMIS 60 is cut in the scraping position or the negligible amounts of the line of core 60.
In this manner, according to this execution mode, with these the second reference waveforms 74a, 74b, 74c and the 74d that comprise singular point A, B, C and D with comprise that these second waveform segments 84a, 84b, 84c and 84d corresponding to the zone of singular point A, B, C and D are that the basis judges whether crimped status is good.
In this execution mode, be that the basis judges whether crimped status is good with these second waveform segments 84a, 84b, 84c and 84d also, these second waveform segments 84a, 84b, 84c and 84d are parts that is divided into the signature waveform 81 of many fragments.Because this reason, the time that is used for judging can shorten.
On the terminals 51 of crimping this is crimped core calking leg 50 in the process of pincers 14 R (sweep) distortion, and to be this be brought to point when being in contact with one another together to core calking leg 50 to singular point A.Some when load value of generation began to rise when singular point B was this to core calking leg 50 beginnings contact with core 60.Singular point C is in the process of calking core 60, the point of the increment of load when " rising " becomes " decline ".Singular point D is the point of load when reaching peak value (not imposed load).Whether good for the crimped status of the terminals 51 of judging crimping, used the reference waveform fragment 72a, 72b, 72c and the 72d that comprise singular point A, B, C and D.Therefore, when the terminals 51 of crimping are crimped, load according to the crimping situation whether well singular point A, B, C and D and near can change, thereby make it possible to determine accurately, definitely the situation of bad crimping.
Under this execution mode, because with these second waveform segments 84a, 84b, 84c and 84d is that the basis judges whether crimped status is good, under the situation of such terminals, promptly, whether good according to crimped status, load on it singular point A, B, C and D and near variation, just can detect the situation of bad crimping accurately, definitely.
Referring now to Figure 13 and 14, provided the explanation of the 4th execution mode of the present invention.In Figure 13 and 14, the similar portions similarly reference symbol has been represented from first to the 3rd execution mode.
In this execution mode, CPU44 is divided into many set time section T with it after producing reference waveform 71, and singular point A, B, C and D are not set.As shown in figure 13, CPU44 calculate with reference to load p 1, P2, P3 ..., Pn, as the fixed reference feature value of these time periods T.
For judging whether crimped status is good, the indicatrix (being marked by chain-dotted line in Figure 14) of acquisition was divided into many set time section T when the terminals 51 that CPU44 will work as crimping were crimped onto on the electric wire 61.CPU44 assumed (specified) load value Pa1, Pa2, Pa3 ..., Pan, they are characteristic values of these set times section T.
With the reference load value P1 of reference waveform 71, P2, P3 ..., Pn and indicatrix 81 load value Pa1, Pa2, Pa3 ..., difference (symbol Δ P2, Δ P3, Δ P4, Δ P5, Δ P6 between the Pan ... Δ Pn) judges for the basis whether crimped status is good.When judging, if all discrepancy delta P2, Δ P3, Δ P4, Δ P5, Δ P6 ... Δ Pn in the threshold range of a regulation, judges that so electric wire in issue is an excellent product.If Δ P2, Δ P3, Δ P4, Δ P5, Δ P6 ... at least one difference has surpassed the threshold value of regulation among the Δ Pn, judges that so electric wire in issue is a bad product.
Incidentally, in Figure 14 A, chain-dotted line has been represented unusual crimping (insulated combination), and its floating coat 62 is combined.In Figure 14 B, chain-dotted line has been represented unusual crimping (shortage core), and its SMIS 60 is cut in the scraping position or the negligible amounts of the line of core 60.
Under this mode, in this execution mode, be that the basis judges whether crimped status is good with the load value of these set times section T.
Also in this execution mode, with load value Pa1, Pa2, Pa3 ..., Pan is that the basis judges whether crimped status good, these load values Pa1, Pa2, Pa3 ..., Pan is the part of signature waveform 81.Because this reason, the time that is used for judging can shorten.
With many load values, just, load value Pa1, the Pa2 of these set times section T, Pa3 ..., Pan is that the basis judges whether crimped status good.Because this reason, in unusual crimping (insulated combination), under the situation that its floating coat 62 is combined, shown in Figure 14 A, with in unusual crimping (shortage core), its SMIS 60 the scraping position cut or the situation of the negligible amounts of the line of core 60 under, as shown in Figure 14B, can accurately determine the situation of bad crimping.
In the 4th execution mode, these set times, section T was arranged to equate.Yet,, just can adopt the load value of different fixing time period as long as make reference waveform 71 corresponding with signature waveform 81.
In the 3rd execution mode, singular point A, B can be defined as follows at first.At first, as mentioned above, produce signature waveform (in Figure 16, marking), then produce first the bad waveform 91 (marking) in the bad crimping (insulated combination), in this bad crimping SMIS 60 and 50 calkings of coating 62 core calking legs by chain-dotted line by solid line.
Crimping operation is proceeded as time goes by.Can obtain beginning to surpass the time T A of passing between the reference waveform 71 from the load (characteristic value) that begins to be crimped onto first bad waveform 91.The point that the time T A of passage finishes is defined as a singular point (first singular point) A.In this case, be in contact with one another because this is brought to together at singular point A core calking leg 50, then the load of first bad waveform 91 (characteristic value) begins to surpass reference waveform 71.Therefore, on the basis of the load value of first bad waveform 91 and reference waveform 71, can define first singular point A definitely.This allows accurately to detect the situation of bad crimping.
Produce reference waveform 71 (being marked by solid line) afterwards in Figure 17, produced one second bad waveform 92 (being marked by chain-dotted line) in Figure 17 in bad crimping (shortage core), the quantity of the line that its SMIS 60 comprises is little during than normal crimping.Can obtain beginning not reach the time T B of passing between the reference waveform 71 from the load (characteristic value) that begins to be crimped onto second bad waveform 92.
The point that the time T B of passage finishes is defined as a singular point (second singular point) B.In this case, be in contact with one another because this is brought to together at singular point B core calking leg 50, then the load of second bad waveform 92 (characteristic value) is reduced to reference waveform 71 under beginning.Therefore, on the basis of the load value of second bad waveform 92 and reference waveform 71, can define second singular point B definitely.This allows accurately to detect the situation of bad crimping.
Above-mentioned bad crimping checkout equipment 300 can be configured to a network system by means of communication interface 48, for example, is connected with a portable computer by network attached to the many bad crimping checkout equipment 300 on many terminal crimping equipment 200.The data of the reference waveform 71 that is provided with by each bad crimping checkout equipment 300 are provided for this portable computer, and are stored on the hard disk that is installed in this portable computer.Reference waveform 71 in each bad crimping checkout equipment 300 all obtains management.
In above-mentioned these execution modes, all detect from Press Plier clamper 15 and be implemented into load on the ram 11, this load in the crimping process as characteristic value.Yet, being applied to the pressure (load) on the anvil 17 or being implemented into the Press Plier clamper and being applied to the stress of ram 11 from Press Plier 14, they can both be detected by pressure sensor 100, also can be used as characteristic value.
A certain amount of strain of strain part can form on the part of ram 11 in advance, also can be used as characteristic value.In this case, preferably arrange the detector on the displacement transducer partly to contact with this strain.This displacement transducer can be arranged between the side plate 3 on the support 1.
Especially, at the terminal crimping equipment 200 of the terminals 51 that are used for the crimping crimping, support 1 is accepted reaction force and is out of shape in the crimping process.Deflection will be according to the kind of terminal crimping equipment 200 and difference.This is because the support of different structure has different rigidity.Some terminal crimping equipment produce big frame deformation, and some terminal crimping equipment produce little frame deformation.Can suppose that a terminal crimping equipment produces zero distortion basically, but this is unpractiaca.
Like this, the terminal crimping equipment 200 of reality employing all has distortion basically.This deflection can be used as a characteristic value.Like this, not only by measuring the deflection of support 1, also, displacement transducer can be installed in the terminal crimping equipment 200 by as ram, making distortion be easy to provide a groove in the reciprocating block slider crank mechanism.
Also can use an acceleration sensor to substitute displacement transducer.In this case, this acceleration sensor is measured the deformation process of support 1.From measured value, obtain the signature waveform 81 in the crimping process, thereby enough data that excellent product and faulty goods are made a distinction are provided.
According to its type, transducer can produce a characteristic value by different way, thereby an increment waveform different with Fig. 5 B is provided.Also in this case, the zero joining of use characteristic value and a peak point can obtain singular point A, B, C and D, as the special point in the single cycle in the same crimping process, as shown in Figure 6.
In above-mentioned these execution modes, used terminal crimping equipment 200, it comes the terminals 51 of crimping crimping by driving servomotor.Yet much less, this invention is applicable to any compression joint mechanism.
Above-mentioned these execution modes all point to a kind of situation, and promptly singular point A, B, C and D are relative is clearly showing.Yet this invention can be handled the situation that singular point A, B, C and D are not clearly showing.In this case, signature waveform 71 under the situation that terminal crimping state is good is made comparisons with the signature waveform 81 under the terminal crimping state condition of poor, and these fragments with big integrated value are used as reference waveform fragment 72a, 72b, 72c, 72d, 72e, 72f, 74a, 74b, 74c and 74d.
In first execution mode, the reference waveform fragment 72a, 72b, 72c and the 72d that comprise singular point A, B, C and D have been used.In second execution mode, the reference waveform fragment 72e and the 72f that do not comprise singular point A, B, C and D have been used.Yet, according to the present invention, short of whole use reference waveform 71 and signature waveform 81 just can suitably be selected reference waveform fragment and signature waveform fragment according to the terminals 51 and the electric wire 61 of crimping from the waveform segment of reference waveform 71 and signature waveform 81.Further, also under the situation that four singular point A, B, C and D are arranged, if variant significantly according to the crimped status load value, according to the present invention, such as, just can use three waveform segments.
Claims (9)
1. method of testing terminal crimping state, this method comprises the steps: based on the waveform of some characteristic values of obtaining in the process of terminal crimping to the core of a wire
Obtain reference waveform the signature waveform during from the normal crimping of terminals;
On the basis of the data of described reference waveform, calculate the characteristic value increment of each unit time;
On the time shaft of described reference waveform, determine singular point for extreme value or zero detected position;
When terminal crimping to be tested is to electric wire, obtain signature waveform; And
Judge based on described singular point and signature waveform whether the crimped status of terminals is good.
2. the method for test terminal crimping state according to claim 1 comprises the steps:
Described reference waveform is divided into a plurality of first reference waveform fragments;
A signature waveform that obtains when terminals to be tested of crimping are to electric wire is divided into the corresponding fragment of those fragments on a plurality of and described reference waveform;
With the area discrepancy between the waveform segment of the first reference waveform fragment of the described reference waveform between described singular point place or these singular points and described signature waveform is that the basis judges whether the crimped status of terminals is good.
3. the method for test terminal crimping state according to claim 1 comprises the steps:
Acquisition begins lapse of time to described singular point from crimping;
Acquisition comprises the second reference waveform fragment of described singular point;
Acquisition comprises second waveform segment of the point corresponding with described singular point, and described second waveform segment is in the signature waveform that obtains when crimping terminals to be tested are to electric wire; And
With the area discrepancy between described second reference waveform fragment and described second waveform segment is that the basis judges whether the crimped status of terminals is good.
4. the method for test terminal crimping state according to claim 3 is characterized in that: described electric wire has the coating that one deck is used to apply described core,
Described terminals have the calking leg that is used for the described core of calking,
When described coating of described calking leg calking and described core, from waveform, obtain one first bad waveform,
From the described reference waveform and the described first bad waveform, obtain one first singular point in the described singular point.
5. the method for test terminal crimping state according to claim 4, it is characterized in that: described first singular point is defined as a passage along with the crimping operation time, the point the when characteristic value of the described first bad waveform surpasses the characteristic value of described reference waveform.
6. the method for test terminal crimping state according to claim 3 is characterized in that:
Described core is wrapped up into a branch of conductor and is formed by a plurality of;
Described terminals have the calking leg that is used for the described core of calking;
When the described conductor of described calking leg calking, from signature waveform, obtain one second bad waveform, wherein, the quantity of the quantity of these conductors during than the normal crimping of terminals is lacked; And
From the described reference waveform and the described second bad waveform, obtain one second singular point.
7. according to the method for claim 4 or 5 described test terminal crimping states, it is characterized in that:
Described core is wrapped up into a branch of conductor and is formed by a plurality of;
When the described conductor of described calking leg calking, from signature waveform, obtain one second bad waveform, wherein, the quantity of the quantity of these conductors during than the normal crimping of terminals is lacked; And
From the described reference waveform and the described second bad waveform, obtain one second singular point.
8. the method for test terminal crimping state according to claim 6, it is characterized in that: described second singular point is defined as a passage along with the crimping operation time, the point the when characteristic value of the described second bad waveform drops under the characteristic value of described reference waveform.
9. the method for test terminal crimping state according to claim 7, it is characterized in that: described second singular point is defined as a passage along with the crimping operation time, the point the when characteristic value of the described second bad waveform drops under the characteristic value of described reference waveform.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001181461A JP4031214B2 (en) | 2001-03-19 | 2001-06-15 | Terminal crimping state identification method |
| JP181461/2001 | 2001-06-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1392637A CN1392637A (en) | 2003-01-22 |
| CN1297044C true CN1297044C (en) | 2007-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021225443A Expired - Fee Related CN1297044C (en) | 2001-06-15 | 2002-06-14 | Detection method for terminal crimping state |
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| CN (1) | CN1297044C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5051094B2 (en) * | 2008-10-15 | 2012-10-17 | 住友電装株式会社 | Terminal insertion failure judgment method |
| JP5297277B2 (en) * | 2009-06-22 | 2013-09-25 | 矢崎総業株式会社 | Method and apparatus for evaluating crimped portion of electric wire and terminal |
| JP6013847B2 (en) * | 2012-09-14 | 2016-10-25 | 矢崎総業株式会社 | Terminal crimping inspection method and apparatus |
| EP2808194B1 (en) * | 2013-05-30 | 2016-01-20 | Volvo Car Corporation | Loose plug detection |
| CN103862260A (en) * | 2014-03-28 | 2014-06-18 | 德清振达电气有限公司 | Lower die of wire clamping machine |
| CN104538816A (en) * | 2015-01-14 | 2015-04-22 | 合肥得润电子器件有限公司 | Terminal crimping and inspection method |
| JP6767176B2 (en) * | 2016-06-10 | 2020-10-14 | 新明和工業株式会社 | Terminal crimping quality judgment device and quality judgment method |
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|---|---|---|---|---|
| US4812138A (en) * | 1987-02-12 | 1989-03-14 | Yazaki Corporation | Connector terminal |
| US5197186A (en) * | 1990-05-29 | 1993-03-30 | Amp Incorporated | Method of determining the quality of a crimped electrical connection |
| CN1131834A (en) * | 1994-12-28 | 1996-09-25 | 矢崎总业株式会社 | Apparatus for crimping terminal to electrical wire |
| US5727409A (en) * | 1994-12-28 | 1998-03-17 | Yazaki Corporation | Method of controlling a terminal crimping apparatus |
| US5937505A (en) * | 1995-03-02 | 1999-08-17 | The Whitaker Corporation | Method of evaluating a crimped electrical connection |
| CN2378737Y (en) * | 1999-04-05 | 2000-05-17 | 林燕庆 | Electric circuit board automatic testing and signal waveform contrast equipment |
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2002
- 2002-06-14 CN CNB021225443A patent/CN1297044C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4812138A (en) * | 1987-02-12 | 1989-03-14 | Yazaki Corporation | Connector terminal |
| US5197186A (en) * | 1990-05-29 | 1993-03-30 | Amp Incorporated | Method of determining the quality of a crimped electrical connection |
| CN1131834A (en) * | 1994-12-28 | 1996-09-25 | 矢崎总业株式会社 | Apparatus for crimping terminal to electrical wire |
| US5727409A (en) * | 1994-12-28 | 1998-03-17 | Yazaki Corporation | Method of controlling a terminal crimping apparatus |
| US5937505A (en) * | 1995-03-02 | 1999-08-17 | The Whitaker Corporation | Method of evaluating a crimped electrical connection |
| CN2378737Y (en) * | 1999-04-05 | 2000-05-17 | 林燕庆 | Electric circuit board automatic testing and signal waveform contrast equipment |
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