CN1075414C - Method of resistance welding control - Google Patents
Method of resistance welding control Download PDFInfo
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- CN1075414C CN1075414C CN96112091A CN96112091A CN1075414C CN 1075414 C CN1075414 C CN 1075414C CN 96112091 A CN96112091 A CN 96112091A CN 96112091 A CN96112091 A CN 96112091A CN 1075414 C CN1075414 C CN 1075414C
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Abstract
A method for adapting fuzzy reasoning to a change of a working environment of resistance welding without requiring a changing or updating of membership functions, thereby assuring optimal control and satisfactory weld quality. The effective value of the welding current and the representative value of the resistance are obtained. After the welding energization is completed, the preset offset values are added to the monitored values. The adaptation degree of the membership function is obtained. Then, the adaptation degree of the membership functions of the conclusion part are summarized, the change ratio of the set value of the welding current is obtained by the method of the center of gravity. Finally, the set value of the welding current is corrected so as to be used for the next welding.
Description
The present invention relates to method of resistance welding control.
The batch (-type) that the constant current of the resistance welded in prior art control the is adopted control of boosting is to get the rough control that number rises the classification of welding current setting value ready every the welding of determining, because the setting of current-rising-rate depends on execute-in-place person's experience and estimation, so for not being that experienced operators is difficult to carry out correct setting, and have the welding quality problem of unstable.
The applicant has at first developed by the degree of carrying out every a welding energising being carried out fuzzy reasoning calculates so that the method for resistance welding control that the welding current setting value that is used for welding next time is revised automatically, and it is open that it is opened flat 7-232280 as the spy.
According to this method of resistance welding control in first to file, as the input variable or the monitor value of fuzzy reasoning The conditions of calculation part, selected is that number etc. is got in detected value, the measured value of welding current, the welding of interelectrode resistance change ready.For example under the situation of the detected value of interelectrode resistance variations as the input variable of condition part, when pressing several condition part member functions of its different degree set along with the resistance change between the welding electrode in the welding galvanization, along with the gradient of welding current setting value is pressed its different degree set and corresponding several conclusion parts of above-mentioned condition part member function, member function; Then, when carrying out resistance welded, detect the variation of the resistance value between welding electrode in this time welding galvanization; Based on the detected value of this resistance change, according to the welding current setting value of this condition part member function and corresponding welding next time of this conclusion part member function correction.
In above-mentioned method of resistance welding control in first to file, even adjusted gets under the Optimal Control state under experimental enviroment, also can be in production environment owing to the material of the structure of welding machine and welding material, number of packages etc. change, become when being not suitable for this and changing in the part of member function, will produce the fuzzy reasoning error of calculation, thereby cause that the control effect of splashing reduces, and weld strength is reduced.
To this incomplete method, have only by changing, member function makes it be fit to new site environment and is only basic processing method.But this member function is owing to coming from tentative wrong, rule of thumb data definition or setting, so to the change after the definition, actual being difficult to of correction.
In view of the above-mentioned problems, the objective of the invention is to, provide a kind of corresponding variation of implementing environment to need not to change member function and just can adapt to the fuzzy reasoning computing so that guarantee optimally-controlled resistance welded control.
In order to achieve the above object, first kind of method of resistance welding control of the present invention comprises the following steps:
Along with the variation of resistance value between the welding electrode in the welding galvanization, according to the member function of its several condition unit of different degree set; Along with the gradient of welding current setting value member function by corresponding several conclusion unit of member function of the different set of its degree and above-mentioned condition unit; For the variation of resistance value between described welding electrode, according to the variation setting compensation value of electric resistance welding environmental condition, so that the minimum of splashing in the welding operation process; Detect the variation of the resistance value between the welding electrode in each welding galvanization; Compensate the variation of the resistance value that is detected with described offset; On the basis of the detected value of the resistance change after the above-mentioned compensation, according to the corresponding welding current setting value of member function correction welding next time of the member function and the above-mentioned conclusion unit of above-mentioned condition unit.
Second kind of method of resistance welding control of the present invention comprises the following steps:
Along with the resistance change between the welding electrode of welding in the galvanization, according to the member function of several first condition unit of different set of its degree; Along with the member function of in various degree setting several second condition unit of the welding current value of welding energising according to its degree; Along with the gradient of welding current setting value member function according to the corresponding conclusion of the member function unit of the different set of its degree and the above-mentioned first and second condition unit; According to the variation of electric resistance welding environmental condition, set first offset for the variation of resistance value between described welding electrode, set second offset for described welding current, so that the minimum of splashing in the welding operation process; Detect the variation of the resistance value between the welding electrode in each welding galvanization; Measure the welding current in each welding galvanization; Compensate the variation of the resistance value that is detected with described first offset; Compensate the welding current of being measured with described second offset; On the basis of the measured value of the detected value of the resistance change after the above-mentioned compensation and welding current, according to the welding current setting value of corresponding welding next time of member function correction of the member function of the above-mentioned first and second condition unit and conclusion unit.
The third method of resistance welding control of the present invention comprises the following steps:
Along with the member function of the resistance change between the welding electrode in the welding galvanization by several first condition unit of different set of its degree; Along with the member function of number by several second condition unit of different set of its degree got in the welding of relevant welding electrode ready; Along with the gradient of welding current setting value member function by corresponding several conclusion unit of member function of the different set of its degree and the above-mentioned first and second condition unit; According to the variation of electric resistance welding environmental condition, set first offset for the variation of resistance value between described welding electrode, and get number ready for described welding and set second offset, so that the minimum of splashing in the welding operation process; Detect the resistance change between the welding electrode in each welding galvanization; The welding of relevant welding electrode is got ready number to be counted; Compensate the variation of the resistance value that is detected with described first offset; Compensate described welding with described second offset and get several count values ready; On the basis that several calculated values is got in the detected value and the welding of the resistance change of above-mentioned compensation ready according to the corresponding next welding current setting value of member function correction of the member function and the above-mentioned conclusion unit of the above-mentioned first and second condition unit.
The control method of the 4th kind of resistance welded of the present invention, comprise the following steps: along with resistance change between the welding electrode of welding in the galvanization by the member function of several first condition unit of different set of its degree; Along with the member function of the welding current value in the welding galvanization according to several second condition unit of different set of its degree; Along with the member function of number by several the 3rd condition unit of different set of its degree got in the welding of relevant welding electrode ready; With the gradient of welding current setting value member function by several conclusion unit of the member function correspondence of the different set of its degree and the above-mentioned the first, the second and the 3rd condition unit; Variation according to the electric resistance welding environmental condition, first offset is set in variation for resistance value between described welding electrode, set second offset for described welding current, get number ready for described welding and set the 3rd offset, so that the minimum of splashing in the welding operation process; Detect the variation of the resistance value between the welding electrode in each welding galvanization; Measure each welding by the welding current in the process; Count the welding of relevant welding electrode and get number ready; Compensate the variation of the resistance value that is detected with described first offset; Compensate the welding current of being measured with described second offset; Compensate described welding with described the 3rd offset and get several count values ready; Detected value in the resistance variations of above-mentioned compensation, the measured value of welding current and welding are got ready on the basis of several count values, according to above-mentioned the first, the second and the corresponding welding current setting value of member function correction welding next time of the member function of the 3rd condition unit and above-mentioned conclusion unit.
According to the present invention, the fuzzy reasoning computing is carried out in each welding energising, the welding current setting value that is used in the welding of next time becomes optimum value and revises.The input variable of the condition part in this fuzzy reasoning computing, be to make the detected value of the resistance change between welding electrode only compensate the value of predefined value in first method, be to make the detection value of the resistance change between welding electrode only compensate the value of predefined value and make the measured value of welding current only compensate the value of predefined value in the second approach, be to make the detected value of the resistance change between welding electrode only compensate the value of predefined value and make welding get the value that several values has only compensated predefined value ready in the third method, be to make the detected value of the resistance change between welding electrode compensate the value of predefined value in the 4th kind of method, make the welding current measured value only compensate the value of preset value and make to weld and get the value that several values has only compensated predefined value ready, the variable or the Current Control value of the output of conclusion unit are the setting values of welding current, for example can obtain the gradient of welding current setting value by the MAX-MIN syllogism.
The circuit that Fig. 1 shows the welder of the method for resistance welding control of finishing one embodiment of the present of invention constitutes block diagram.
Fig. 2 is the oscillogram of each unit of presentation graphs 1.
Fig. 3 is the figure of setting example of member function of the welding current of expression embodiment fuzzy reasoning computing.
Fig. 4 is the figure of setting example of the member function of the resistance change between the welding electrode of expression embodiment fuzzy reasoning computing.
Fig. 5 is the figure that the setting example of several member functions is got in the welding of expression embodiment fuzzy reasoning computing ready.
Fig. 6 is the figure that the member function of conclusion unit of the welding current increment rate of expression embodiment fuzzy reasoning computing is set example.
Fig. 7 is illustrated in the figure of center of gravity calculation of MAX-MIN syllogism that embodiment is compensated the fuzzy reasoning computing in when operation.
Fig. 8 is the stasiofax nomogram that is illustrated in the MAX-MIN syllogism of the fuzzy reasoning computing when embodiment not being compensated operation.
Fig. 9 is the control law table that is illustrated in the fuzzy reasoning computing of embodiment.
Figure 10 is the flow chart of calculation process action of control module (CPU) of the fuzzy reasoning computing of expression embodiment.
Figure 11 is the formation block diagram of the welder of the applicable converter type resistance welding machine of the present invention of expression.
Embodiments of the invention are described with reference to the accompanying drawings.
Fig. 1 shows the blow-up streaming resistance welding machine circuit formation that the circuit that adopts the resistance welded control device of implementing one embodiment of the present of invention constitutes and installs.Fig. 2 shows the signal waveform of each unit.
In this resistance welding machine, during the welding energising, the alternating voltage E (Fig. 2 A) that inputs to the commercial frequency of input 10,12 supplies with the primary winding of welding transformer 18 through the contact of being made up of a pair of controllable silicon.The alternating current impression electromotive force (secondary voltage) that the secondary coil of soldered transformer 18 produces is added on the welding material 24,26 by secondary lead and a pair of welding electrode 20,22, flows through welding current I (Fig. 2 B) in secondary circuit.
In secondary circuit, be provided with the loop coil 30 that is used to detect welding current I.When welding current I flows through, by the differentiated waveform di of loop coil 30 output expression welding current I.This loop coil output signal di inputs to the waveform restoration circuit of being made up of integrating circuit 32, and the waveform of expression welding current I or the welding current detection signal qi (Fig. 2 B) of instantaneous value are from the output output of waveform ReSet Circuit 32.This welding current detection signal qi supplies with CPU100 after being transformed into data signal Dqi through a-d converter 34.
CPU100 makes welding current measured value qi and the welding current setting value Is that is supplied with by setup unit 16 as one man control the striking sequential of controllable silicons 14,16 by arc ignition circuit 38.
Timing signal Tz (Fig. 2 D) supplies with CPU100 from the no-voltage testing circuit 41 and the zero current detection circuit 40 that are used for this controllable silicon striking control.No-voltage testing circuit 41 detects the supply voltage zero passage, produces controllable silicon striking control timing signal Tc with making polarity become anti-pulse signal.Lightning current detects testing circuit 40, when electric current first-class out-of-date, silicon controlled voltage just descends, silicon controlled voltage just rises when electric current stops, according to this phenomenon, the conducting zero hour and the finish time according to silicon controlled rectifier voltage changes each welding current that detects each half cycle, produce the timing signal T that sampling keeps usefulness for welding energising control module described later
SH(Fig. 2 G) and integration reset with timing signal TR (Fig. 2 (H)).
Like this, in the resistance welded control device of present embodiment, by loop coil 30, the electric current of deciding that waveform ReSet Circuit 32, a-d converter 34, setup unit 36, CPU100, zero current detection circuit 40, arc ignition circuit 38, no- voltage testing circuit 41 and 14,16 pairs of controllable silicons flow through in welding material 20,22 carries out negative-feedback control.
In the resistance welded control device of present embodiment, when the welding energising,,, detect the resistance change Δ R of 20,22 of welding electrodes simultaneously Yi Bian measure the virtual value of welding current I Yi Bian control the above-mentioned Current Control of deciding.CPU100 calculates the virtual value of welding current I according to the welding current detection signal [qi] that obtains from loop coil 30, waveform restoring circuit 32 and a-d converter 34.The variation of the resistance value that welding electrode is 20,22 is detected by following resistance variations detecting unit.
Measure the resistance change between the welding electrode 20,22 that clips welding material 22,26 for per 1 week or half cycle, the resistance change detecting unit comprises current integration circuit 42, voltage integrating meter circuit 44 and sampling hold circuit 46,48, AD converter 50,52 and CPU100.
The welding current detection signal qi that obtains from waveform restoring circuit 32 inputs to current integration circuit 42.Current integration circuit 42 response from the timing signal TR of zero current detection circuit 40 weekly all with the welding current detection signal qi of positive polarity to time integral, and the current integration value signal Si (Fig. 2 E) of this time integral value of output expression.Sampling hold circuit 46 responses are from the timing signal T of zero current detection circuit 40
SHThe value [Sin] of current integration value signal Si when the maintenance positive polarity of sampling weekly welding current I ends (n=1,2 ...).This current sample retention value [Sin] inputs to CPU100 after a-d converter 50 is transformed into data signal [DSin].
CPU100 just obtains interelectrode resistance R N according to being stored in voltage sample retention value [Svn] that calculation procedure in the memory 54 will be the weekly sampling retention value [Sin] divided by electric current, obtains the interelectrode resistance value R of this interelectrode resistance R N and the last week again
N-1Difference DELTA R (R
N-R
N-1).Usually when splashing, interelectrode resistance suddenly swashs decline, and it is big that difference DELTA R also becomes.In the present embodiment, select that maximum value among the difference DELTA R that from each cycle, obtains, and this value as the representative that ought last time weld the resistance between electrode value variation during the energising.
CPU100 gets several N ready to the welding that is installed to current time from welding electrode 20,22 and counts, and makes count value N only add 1 (N=N+1) after each welding energising finishes.
Like this, in the present embodiment,, detect the increased resistance value Δ R between the welding electrode 20,22, carry out the mensuration of virtual value of welding current I and the calculating that several N are got in welding ready in each time when energising welding.As following, make these three factor Δ R, I, N only compensate the value that preestablished, carry out the fuzzy reasoning computing according to the value after the compensation, the more corresponding welding current setting value of welding next time is revised.
The following describes the fuzzy reasoning computing in the present embodiment.Adopt representational MAX-MIN inference method in the fuzzy deduction computing in the present embodiment.
In order to carry out the inference computing, as shown in Figure 3, with welding current I by its degree difference for example roughly be divided into " little ", " in " and " greatly " three groups, member function of setting each group is IL, IM and IH.
As shown in Figure 4, again with the increased resistance value Δ R of welding electrode 20,22 difference by its degree, roughly be divided into " low ", " in " and " height " three groups, and set member function Δ RL, Δ RM and Δ RH that each is organized.
As shown in Figure 5, several N are got in till now welding ready after more relevant welding electrode 20,22 being loaded onto, by the difference of its degree for example roughly be divided into " lacking ", " in " and " many " three groups, and set member function NL, NM, the NH of these three groups.It more than is the setting of condition unit (prerequisite unit) member function.
As shown in Figure 6, the increase and decrease (correction) that welding current is set value Is also for example roughly is divided into " rising ", " constant " and " decline " three groups by its degree difference, and sets member function D, S, the U of each group.These three member functions that function D, S, U are the conclusion unit.
The member function of above-mentioned condition unit member function and conclusion unit connects by control law table shown in Figure 9.The variable of condition unit (input value) has three kinds of Δ R, I and N in Fig. 8, and every kind define three states or degree (Δ RL, Δ RM, Δ RH), (IL, IM, IH), (NL, NM, NH), therefore, have 27 kinds of control law W1～W27 and set up, on each control law, be set with fuzzy value U (rising), S (constant) and the D (decline) of conclusion unit.The first control law W1 for example, be defined as " if resistance between electrode value Δ R low (Δ RL), welding current little (IL), and welding gets several N few (NL) ready, then improves (U) welding current setting value IS ".In addition, the 25th control law W25 is defined as that " if several N many (NH) are got in interelectrode resistance value Δ R low (Δ RL) welding current big (IH) and welding ready, then welding current sets value IS remain unchanged (S).”
This control law table inputs to CPU100 to each setting data setting and expansion on memory 54 with the member function of above-mentioned condition unit and the member function of conclusion unit by setup unit 36.
In addition, in the present embodiment, the variation that responds the operating environment of this resistance welding machine is set offset δ Δ R, δ I and the δ N that several N are got in resistance change Δ R, welding current I between the input counter electrodes and welding ready by setup unit 36.These offsets δ Δ R, δ I and the δ N absolute value as plus or minus, perhaps the % value of plus or minus is set and is stored in the memory 54.
Figure 10 is the flow chart that the s operation control of the CPU100 of expression present embodiment is operated.During welding energising, as mentioned above, Yi Bian control current constant, Yi Bian calculate the typical value (maximum) of the virtual value of welding current I and the resistance value Δ R between welding electrode and welding got ready several N once count (1.).
When the welding energising finishes, on Δ R, I, N value, increase offset δ Δ R, δ I, δ N (2.) respectively.Under the situation that these offsets δ Δ R, δ I, δ N set as the absolute value of plus or minus, by its former state addition.So make Δ R compensate to (Δ R+ δ R), make I compensate to (I+ δ I), make N compensate to (N+ δ N).
Then obtain the degree of membership (3.) in each member function according to value (Δ R+ δ Δ R), (I+ δ I), (N+ δ N) after these compensation.
For example, suppose that the measured value of the electric current I during certain welding is switched on is 7KA, the detected value of Δ R is 12 μ Ω, and N is 600 times, and in order to control the effect of splashing reliably, offset (δ Δ R, δ I, δ N) for example can be set in (4,0,0).
At this moment, in the member function (Fig. 3) of I, because (I+ δ I) is 7, so the degree of membership of IL is 0.3, the degree of membership of IM is 0.5, and the degree of membership of IH is 0.In the member function (Fig. 4) of Δ R, because (Δ R+ δ Δ R) is 16, so the degree of membership of Δ RL is 0, the degree of membership of Δ RM is 0, the degree of membership of Δ RH is 1.In the member function (Fig. 5) of N, because N+ δ N is 600, so the degree of membership of NL is 0.8, the degree of membership of NM is 0.1, and the degree of membership of NH is 0.
Then, obtain the degree of membership (4.) of member function (Fig. 6) of each conclusion unit of each control law according to degree of membership (0,0,1), (0.3,0.5,0), (0.8,0.1,0) of the member function of (Δ R+ δ Δ R), (I+ δ I), (N+ δ N).At this is of minimum who selects by the MAX-MIN syllogism in the degree of membership of condition unit of each control law (Fig. 9).For example, in the first control law W1, be following formula
U=IL*ΔRL*NL
=0.3*0*0.8
=0
In addition, in the 5th control law W5, be following formula
S=IM*ΔRM*NL
=0.5*0*0.8
=0
For other control law W2～W4, W6～W27 also can carry out same logical operation, respectively 4 degrees of membership of obtaining the member function of each conclusion unit.
Then the degree of membership of member function U, the S of conclusion unit, D is concluded (5.).Select member function U, the S of each conclusion unit and the maximum U of D by the MAX-MIN syllogism
MAX, S
MAX, D
MAXSo obtain following each value
U
MAX=0
S
MAx=0
D
MAx=0.5
Then, in member function U, the S and D of conclusion unit, utilize gravity model appoach to obtain the gradient (6.) that operating value is the welding current setting value according to above-mentioned degree of membership.For this reason, as long as respectively with member function U, S, the D of degree of membership 0,0,0.5 intercepting conclusion unit, just can obtain by the area shown in the usefulness oblique line in Fig. 7, can obtain the position of centre of gravity on the transverse axis of this area, in this example, obtain-60% increment rate (being that slip is 6%) approximately.
Then, revise the welding current setting value, should corrected welding current setting value be stored in the memory 54, use for welding next time according to the electric current gradient that obtains as stated above.
In welding next time, make welding current setting value IS also reduce by 6% than last time, carry out reaction type then and decide Current Control.Whereby, in welding material 24,26, under fuzzy control, supply with, thereby control is splashed effectively than the welding current that last time also lacked.
If do not carry out compensating operation as described above, and monitor value Δ R, I, N obtained the degree of membership of each member function as input variable.At this moment, the member function of I (Fig. 3) and N (Fig. 5) though the degree of membership of member function same as described above, but because in the member function (Fig. 4) of Δ R, Δ R is 12, so the degree of membership of Δ RL is 0, the degree of membership of Δ RM is 0.7, and the degree of membership of RH is 0.25, at last, member function U, the S of induction findings unit, the maximum D of D
MAX, S
MAXAnd D
MAXJust become following value
U
MAM=0
S
MAX=0.5
D
MAX=0.3
In member function U, the S and D of conclusion unit, utilize gravity model appoach to obtain the gradient of welding current setting value according to above-mentioned degree of membership, as shown in Figure 8, obtain about 1% increment rate.
Therefore, under the situation of the compensating operation that does not carry out present embodiment, owing in next time welding, make the welding current setting value than also improving 1% last time, and carry out the Current Control of reaction type, it is more difficult that restriction is splashed.
That is to say that by carrying out the operation of present embodiment, the operating environment of compensating resistance welding and the gap of member function just can be limited effectively and be splashed under fuzzy control.
As mentioned above, in the present embodiment, resistance change Δ R and welding between welding current I, welding electrode are got ready several N as variable or monitor value, on these monitor values I, Δ R, N, increase offset δ Δ R, δ I, δ N respectively, utilize the fuzzy reasoning computing just can revise according to monitor value (Δ R+ δ Δ R), (I+ δ I), (N+ δ N) after these compensation and be used for next welding current setting value.
In order to adapt to the replacing of resistance welding machine plumb joint, the variation of welding such as the change of the material of weldment resistance welded operating environment; By selected offset δ Δ R, δ I and δ N, even do not change the characteristic or the control law of the member function of the member function of condition unit or conclusion unit, also can in control module (CPU100), revise welding current setting value IS automatically and accurately, even be not that skilled operators can not cause that welding peels off and splash etc. yet, thereby obtain the high quality welding part.
In addition, under offset δ Δ R, δ I and the situation of δ N, then in the processing of step (2.), make monitor value Δ R, I and N compensate to Δ R (1+ δ Δ R), I (1+ δ I) and N (1+ δ N) respectively as the % value setting of plus or minus.So in the processing of step (3.), can obtain the degree of membership of each member function according to these value Δ R that compensated (1+ δ Δ R), I (1+ δ I) and N (1+ δ N).Also can carry out compensation same as described above in this case.
In addition, in the above-described embodiments, in the processing of obtaining degree of membership, make currency compensation, but also can be that degree of membership behind fuzzy deduction obtains that (Fuzzy Processing) makes the currency compensation in the processing of currency (controlled quentity controlled variable) according to currency (monitor value).
Even be considered to most important variable in above-mentioned monitor value I, Δ R, N is Δ R, therefore, only utilize compensation same as described above and fuzzy reasoning computing also can obtain the gradient that welding current sets value according to the detected value of Δ R or according to the measured value of the detected value of Δ R and I or according to detected value and the N value of Δ R.Above-mentioned MAX-MIN syllogism and gravity model appoach are examples, also can adopt other syllogism or other operation method such as area-method, center line average method such as algebraic product-addition syllogism.
Though the foregoing description is the relevant method of method of resistance welding control of meeting sb. at the airport with the single phase ac electric resistance welding, the present invention also is suitable for the resistance welded control method of converter type resistance welding machine such shown in Figure 11.Represent with same label with the identical in fact parts of Fig. 1 among Figure 11.In this resistance welded control device, no matter be in primary circuit or secondary circuit, can detect welding current.The variation of interelectrode resistance value can be obtained by the computing of CPU100 according to the output signal Si of secondary current testing circuit 60 and the output signal Sv of inter-electrode voltage testing circuit 62.The counting that several N are got in welding ready is also undertaken by CPU100.
As mentioned above, according to method of resistance welding control of the present invention, weld the degree that energising is carried out according to each, make the monitor value of resistance change etc. between welding electrode only compensate the amount that preestablished, utilize the welding current setting value of fuzzy reasoning computing correction welding next time usefulness according to the monitor value that has compensated, adapt to the variation of the operating environment of welding, under the condition that does not change member function, adapt to the fuzzy deduction computing, thereby can guarantee best automatic control and good welding quality.
Claims (4)
1, a kind of method of resistance welding control comprises the following steps:
Along with the variation of resistance value between the welding electrode in the welding galvanization, according to the member function of its several condition unit of different degree set;
Along with the gradient of welding current setting value member function by corresponding several conclusion unit of member function of the different set of its degree and above-mentioned condition unit;
For the variation of resistance value between described welding electrode, according to the variation setting compensation value of electric resistance welding environmental condition, so that the minimum of splashing in the welding operation process;
Detect the variation of the resistance value between the welding electrode in each welding galvanization;
Compensate the variation of the resistance value that is detected with described offset;
On the basis of the detected value of the resistance change after the above-mentioned compensation, according to the corresponding welding current setting value of member function correction welding next time of the member function and the above-mentioned conclusion unit of above-mentioned condition unit.
2, a kind of method of resistance welding control comprises the following steps:
Along with the resistance change between the welding electrode of welding in the galvanization, according to the member function of several first condition unit of different set of its degree;
Along with the member function of the welding current value of welding energising according to several second condition unit of different set of its degree;
Along with the gradient of welding current setting value member function according to the corresponding conclusion of the member function unit of the different set of its degree and the above-mentioned first and second condition unit;
According to the variation of electric resistance welding environmental condition, set first offset for the variation of resistance value between described welding electrode, set second offset for described welding current, so that the minimum of splashing in the welding operation process;
Detect the variation of the resistance value between the welding electrode in each welding galvanization;
Measure the welding current in each welding galvanization;
Compensate the variation of the resistance value that is detected with described first offset;
Compensate the welding current of being measured with described second offset;
Make the detected value of above-mentioned resistance change only compensate the value that preliminary election was set;
On the basis of the measured value of the detected value of the resistance change after the above-mentioned compensation and welding current, according to the welding current setting value of corresponding welding next time of member function correction of the member function of the above-mentioned first and second condition unit and conclusion unit.
3, a kind of method of resistance welding control comprises the following steps:
Along with the member function of the resistance change between the welding electrode in the welding galvanization by several first condition unit of different set of its degree;
Along with the member function of number by several second condition unit of different set of its degree got in the welding of relevant welding electrode ready;
Along with the gradient of welding current setting value member function by corresponding several conclusion unit of member function of the different set of its degree and the above-mentioned first and second condition unit;
According to the variation of electric resistance welding environmental condition, set first offset for the variation of resistance value between described welding electrode, and get number ready for described welding and set second offset, so that the minimum of splashing in the welding operation process;
Detect the resistance change between the welding electrode in each welding galvanization;
The welding of relevant welding electrode is got ready number to be counted;
Compensate the variation of the resistance value that is detected with described first offset;
Compensate described welding with described second offset and get several count values ready;
On the basis that several count values is got in the detected value and the welding of the resistance change of above-mentioned compensation ready according to the corresponding next welding current setting value of member function correction of the member function and the above-mentioned conclusion part of the above-mentioned first and second condition unit.
4, a kind of control method of resistance welded comprises the following steps:
Along with resistance change between the welding electrode in the welding galvanization is pressed the member function of several first condition unit of different set of its degree;
Along with the member function of the welding current value in the welding galvanization according to several second condition unit of different set of its degree;
Along with the welding of relevant welding electrode get ready the number cross the member function of several the 3rd condition unit of different set of degree by it;
With the gradient of welding current setting value member function by several conclusion unit of the member function correspondence of the different set of its degree and the above-mentioned the first, the second and the 3rd condition unit;
Variation according to the electric resistance welding environmental condition, first offset is set in variation for resistance value between described welding electrode, set second offset for described welding current, get number ready for described welding and set the 3rd offset, so that the minimum of splashing in the welding operation process;
Detect the variation of the resistance value between the welding electrode in each welding galvanization;
Measure each welding by the welding current in the process;
Count the welding of relevant welding electrode and get number ready;
Compensate the variation of the resistance value that is detected with described first offset;
Compensate the welding current of being measured with described second offset;
Compensate described welding with described the 3rd offset and get several count values ready;
Detected value in the resistance variations of last rheme compensation, the measured value of welding current and welding are got ready on the basis of several count values, according to above-mentioned the first, the second and the corresponding welding current setting value of member function correction welding next time of the member function of the 3rd condition unit and above-mentioned conclusion unit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3238495A JP3108308B2 (en) | 1995-02-21 | 1995-02-21 | Inspection method and apparatus for liquid crystal substrate |
| JP323848/1995 | 1995-11-17 | ||
| JP323848/95 | 1995-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1155460A CN1155460A (en) | 1997-07-30 |
| CN1075414C true CN1075414C (en) | 2001-11-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96112091A Expired - Fee Related CN1075414C (en) | 1995-02-21 | 1996-11-15 | Method of resistance welding control |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3108308B2 (en) |
| CN (1) | CN1075414C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980020101A (en) * | 1996-09-05 | 1998-06-25 | 손욱 | Short-circuit and open inspection of ITO thin film pattern of liquid crystal display device |
| CN103394801B (en) * | 2013-08-16 | 2015-11-04 | 天津商科数控设备有限公司 | Automobile metal thin plate is without the method for splashing dynamic heat self adaptation electric resistance welding |
| JP6318694B2 (en) * | 2014-02-25 | 2018-05-09 | オムロン株式会社 | Inspection device, inspection method, program, and recording medium |
| CN107030361B (en) * | 2016-12-09 | 2019-05-17 | 广东技术师范大学 | A kind of welding energy On-Line Control Method |
| JP6897914B1 (en) * | 2020-02-21 | 2021-07-07 | 株式会社オリジン | Manufacturing method of joining equipment and joined members |
| CN112008219A (en) * | 2020-08-17 | 2020-12-01 | 奇瑞汽车股份有限公司 | Detection method for counting resistance spot welding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367610A (en) * | 1988-09-28 | 1994-11-22 | Omron Tateisi Electronics Co. | Fuzzy controller for selecting an input signal |
| WO1995007165A1 (en) * | 1993-09-11 | 1995-03-16 | Robert Bosch Gmbh | Resistance-welding method |
| EP0669182A2 (en) * | 1994-02-25 | 1995-08-30 | Miyachi Technos Corporation | Method for controlling resistance welding using fuzzy reasoning |
-
1995
- 1995-02-21 JP JP3238495A patent/JP3108308B2/en not_active Expired - Fee Related
-
1996
- 1996-11-15 CN CN96112091A patent/CN1075414C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367610A (en) * | 1988-09-28 | 1994-11-22 | Omron Tateisi Electronics Co. | Fuzzy controller for selecting an input signal |
| WO1995007165A1 (en) * | 1993-09-11 | 1995-03-16 | Robert Bosch Gmbh | Resistance-welding method |
| EP0669182A2 (en) * | 1994-02-25 | 1995-08-30 | Miyachi Technos Corporation | Method for controlling resistance welding using fuzzy reasoning |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3108308B2 (en) | 2000-11-13 |
| CN1155460A (en) | 1997-07-30 |
| JPH08227060A (en) | 1996-09-03 |
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