CN1158158C - Resistance weld control method and device - Google Patents
Resistance weld control method and device Download PDFInfo
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- CN1158158C CN1158158C CNB001043757A CN00104375A CN1158158C CN 1158158 C CN1158158 C CN 1158158C CN B001043757 A CNB001043757 A CN B001043757A CN 00104375 A CN00104375 A CN 00104375A CN 1158158 C CN1158158 C CN 1158158C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/241—Electric supplies
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Abstract
The present invention obtains a satisfactory weld quality by making unnecessary pilot energizing in each weld energizing, and making a welding current flow so that the welding current is almost equal to a set welding current from a first cycle. In an initialization, after reading out the initial value of an ignition angle for test energizing, the number of cycles, a standard current value, etc., from a memory, they are set in a prescribed register or a counter. Next, the test energizing is started, and in a first cycle, a thyristor is ignited with the above described initial value, and in cycles from and after a second cycle, the ignition angle is determined under a constant current control. A current measured value and the measured value of a power-factor angle are obtained for each cycle. From factor in a cycle where the current measured value approximates to the standard current value, a maximum current value is found.
Description
Technical field
The present invention relates to be used in the AC system resistance welder carry out the resistance weld control method and the device of constant current control.
Background technology
In general AC system resistance welder, the AC supply voltage of mains frequency is offered the primary coil of welding transformer through the contactor of a pair of controllable silicon (サ イ リ ス ) formation, make welding current flow to secondary circuit from its secondary coil, make a pair of materials to be welded fusion by the joule heating, with these materials to be welded metallurgy joints.
In this resistance welder, timing that can be by controllable silicon is triggered, be trigger angle, control the size of welding current.Therefore, carrying out under the situation of constant current control, control controllable silicon trigger angle makes in each cycle welding current and setting current value is consistent to get final product.
Generally in the constant current control mode, on the primary circuit of welding transformer or secondary circuit, current detecting part is set, carry out FEEDBACK CONTROL, make the mensuration current value consistent with the setting current value, the controllable silicon trigger angle decides according to the mensuration current value in last cycle and the relative error of setting between the current value.Yet, because this feedback loop is not worked as yet in initial (the 1st) cycle, so the controllable silicon trigger angle is used the value of setting as initial value.
Be used for determining welding that the existing skill and technique of initial value of energising controllable silicon trigger angle is known that following method arranged: before in regular welding energising (formal energising), at least carry out the guiding energising of half period with the trigger angle of suitable selection, the measured value (effective value) of the test current that flows in the time of thus and drag angle are come rated output factor angle and best trigger angle (with setting the corresponding trigger angle of current value), in the formal energising after tight, with the initial value of this best trigger angle as the controllable silicon trigger angle.
In above-mentioned guiding step mode, before formal energising was tight, test current flow through materials to be welded.In the welding that thickness ratio is big and periodicity is many of the materials to be welded such as car body welding of motor vehicle, the influence of guiding energising less is a problem.Yet, in the welding of the thin smallclothes of the thickness of slab of materials to be welded such as precise electronic parts or the welding of dissimilar metal etc., sometimes make materials to be welded generation physical change owing to guiding to switch on, the control that in formal energising, can not expect, the perhaps welding quality that can not obtain expecting.For example, sometimes because guiding energising, materials to be welded melts unusually and can not weld, and perhaps needs to enlarge to proofread and correct welding current or conduction time, and perhaps productive temp prolongs, and it is dirty perhaps to weld trace, and perhaps materials to be welded and electrode cling etc.
In addition, in existing this resistance welder, in the operation field welding machine main body is set, setting the moment of source of welding current portion to control part, because the maximum current of this welding machine also uncertain (because about maximum current secondary conductor or cable and welding electrode etc. by the scene) is so be set at appropriate value with the maximum current of anticipation.Yet, because this maximum current anticipation value not based on any mensuration, so correctness is not good enough, is come in and gone out very big with the lowest high-current value of reality sometimes.Therefore, produce error sometimes in the various parameters of using lowest high-current value and the computing under the condition, perhaps the precision of energising control and welding quality reduce.
Summary of the invention
The present invention be exactly Given this problem propose, its objective is provides a kind of resistance weld control method and device, dispensing with bootstrap energising in each welding energising was promptly flow through and is set current value welding current unanimous on the whole from the 1st cycle, can obtain good welding quality reliably.
To achieve these goals, resistance weld control method of the present invention is in the AC system resistance welder of certain controllable silicon trigger angle-current relative value characteristic of parameter having with the power-factor angle, control controllable silicon trigger angle in each half period of welding energising or one-period, make that alternating current unanimous on the whole flows through with setting current value, it is characterized in that, have: the 1st step, carry out and regular independently test energising of welding energising, trigger angle, current value and the power-factor angle in being switched on by above-mentioned test asked the maximum current in the above-mentioned resistance welder; The 2nd step, the operation values of storing above-mentioned maximum current; The 3rd step to the above-mentioned setting current value in the welding energising of being given, is asked controllable silicon trigger angle initial value by above-mentioned maximum current operation values and above-mentioned controllable silicon trigger angle-current relative value characteristic; And the 4th step, in above-mentioned welding energising of giving, make initial half period or one-period energising with above-mentioned controllable silicon trigger angle initial value, use the amperometric determination value and the corresponding controllable silicon trigger angle of relative error between the above-mentioned setting current value that flow through in half period or the one-period with last time to make each later half period or one-period energising.
In resistance weld control method of the present invention, best, above-mentioned the 1st step has: the 5th step, set the reference current value that is used for above-mentioned test energising; The 6th step makes the 1st cycle energising in the above-mentioned test energising with the controllable silicon trigger angle initial value of predefined test energising usefulness; The 7th step in above-mentioned test energising, compares the measured value and the said reference current value of the electric current that flow through in last time in each cycle and asks error; The 8th step uses the controllable silicon trigger angle corresponding with above-mentioned relative error that the 2nd each cycle in the above-mentioned test energising switched on; And the 9th step, interim trigger angle, current value and power-factor angle the last week by above-mentioned relative error during less than pre-set threshold asked above-mentioned maximum current operation values.
In the case, by finishing above-mentioned test energising in less than the initial cycle of above-mentioned threshold value, energising cycle and calculation process can be suppressed to minimum required limit in above-mentioned relative error.
Description of drawings
Fig. 1 is the circuit diagram of structure of AC system resistance welder that adopts the resistance welding control device of one embodiment of the invention;
Fig. 2 is the performance diagram of controllable silicon trigger angle-welding current relative value characteristic of using of the resistance welding control device of embodiment;
Fig. 3 is the process flow diagram of the processing procedure of microprocessor during the test of embodiment is switched on;
Fig. 4 triggers regularly and the oscillogram of electric current during the test of embodiment is switched on;
Fig. 5 is the process flow diagram of the processing procedure of microprocessor during the test of embodiment is switched on;
Fig. 6 is used among the embodiment the switch on process flow diagram of processing procedure of the microprocessor of asking controllable silicon trigger angle initial value of the welding of being given;
Fig. 7 is the process flow diagram of the processing procedure of microprocessor during the welding of embodiment is switched on;
Fig. 8 triggers regularly and the oscillogram of electric current during the welding of embodiment is switched on; And
Fig. 9 triggers regularly and the oscillogram of electric current during the test of one variation is switched on.
Embodiment
Below, describe embodiments of the invention in detail with reference to accompanying drawing.
Fig. 1 illustrates the circuit structure of the AC system resistance welder of the resistance welding control device that adopts one embodiment of the invention.In this resistance welder, the AC supply voltage E that is input to the mains frequency of input terminal 10,12 offers the primary coil of welding transformer 18 through the contactor of a pair of controllable silicon 14,16 formations.The induction electromotive force of the interchange that produces on the secondary coil of welding transformer 18 (secondary voltage) is applied on the materials to be welded 24,26 through secondary conductor and pair of electrodes point 20,22, and secondary current or welding current i2 (I) flow through secondary circuit.
The size of welding current I (effective value) is by energising angle decision, but owing between trigger angle and energising angle certain relation is arranged substantially, so also we can say by trigger angle and determine.In this resistance welding control device, microprocessor 28 is controlled the effective value of welding current I by control the triggering timing of controllable silicon 14,16 in each cycle through trigger circuit 30.In the present embodiment, with the half period of mains frequency as energising or trigger the unit period of control.
During welding current I flows through secondary circuit, with secondary current i
2(I) little electric current (primary current) i of homophase and waveform similarity
1Flow through primary circuit.In the present embodiment, in order to carry out constant current control, CT coil 32 and welding current are set in primary circuit measure circuit 34 as current detecting part.CT coil 32 produces expression primary current i
1The output voltage of waveform.Welding current is measured circuit 34 is asked welding current I by the output voltage of CT coil 32 effective value.Also can the such current sensor of toroid winding be set and detect electric current in primary side.
In the welding energising, the amperometric determination value [I] of measuring circuit 34 from welding current is provided for microprocessor 28.Microprocessor 28 in each cycle in the welding energising with amperometric determination value [I
n] and set current value [I
S] compare, ask the trigger angle that following one-period uses by this relative error, in following one-period, trigger controllable silicon 14,16 with this trigger angle.
As described later, in initial (the 1st) cycle, the setting current value [I of appointment in maximum weld current operator value of this resistance welder of obtaining in the test energising of use by present embodiment and this welding energising
S] and the trigger angle initial value φ that obtains
1Set current value [I
S] be input to microprocessor 28 by input media 36 settings, remain in the storer 38.
Not only storage and the computing of microprocessor 28 or control relevant various programs and computing, measured value data in the storer 38, but also with shown in Figure 2 be that the controllable silicon trigger angle-welding current relative value characteristic of parameter is stored as showing with the power-factor angle.In Fig. 2, for easy diagram, power-factor angle θ only be shown be 4 kinds of situations of 0 °, 30 °, 60 °, 80 °, but in fact θ also can be more subtly, for example at interval 0.5 ° set each family curve.
This controllable silicon trigger angle-welding current relative value characteristic is obtained in theory, so power-factor angle θ, welding current relative value %I
RMSAnd the triangular relation of controllable silicon trigger angle θ is determined by this family curve is unique.
In the present embodiment, be in each cycle of energising, to measure power-factor angle, for this reason, zero current detection circuit 42 and no-voltage testing circuit 44 are set on primary circuit.Zero current detection circuit 42 monitors the voltage of 14,16 of controllable silicons, and electric current flows through then silicon controlled rectifier voltage reduction, and electric current stops then silicon controlled rectifier voltage rising, detection of primary current i in each cycle thus
1Conducting start time and conducting concluding time, the zero current detection signal of the timing of expression this conducting start time and conducting concluding time is offered microprocessor 28.No-voltage testing circuit 44 detects the moment (zero crossing) of the reversing of supply voltage E in every half period, the no-voltage detection signal of representing the timing of this zero crossing is offered microprocessor 28.Microprocessor 28 is according to from the zero current detection signal of zero current detection circuit 42 and from the no-voltage detection signal of no-voltage testing circuit 44, the power-factor angle θ that asks each cycle by the formula or the table of regulation.The derivation of power-factor angle can be used disclosed method in No. the 2767328th, (Japan) patent of the applicant in the present embodiment.
Fig. 3 illustrates the processing procedure of the microprocessor that is used to test energising in the present embodiment.Fig. 4 is the waveform of current i during the test of present embodiment is switched on.
When can or carrying out the part change (such as the length or the wiring path of change secondary cable) of inscape when operation field is set this resistance welder, this test energising implements.
When the test energising, in initialization, with the trigger angle initial value φ of predefined test energising usefulness
(1), periodicity N
A, reference current value I
GRead Deng from storer 38, be set to the register or the counter (steps A of regulation
1).Periodicity N
ACan set integer arbitrarily.Therefore, also can set N
A=1, i.e. single cycle (being the half period of mains frequency in the present embodiment).
Then, begin the test energising.In initial (the 1st) cycle, with above-mentioned initial value φ
(1)Trigger controllable silicon 14,16 (steps A
2).In the moment of testing energising, maximum current I
MAXValue determine, so in the initial cycle, can select to make the trigger angle initial value φ that flows through small amount of current i
(1)For the current i that in this cycle, flows through, from welding current mensuration circuit 34, zero current detection circuit 42, no-voltage testing circuit 44 etc., be taken into various measured values, carry out required computing, obtain amperometric determination value I
NAnd power-factor angle measured value θ
N(steps A
3, A
4).These measured values I
N, θ
NBe stored in the storer 38.
In the test energising of present embodiment, carry out constant current control.For this reason, value (effective value) I that compares the interim electric current that flows through the last week
NWith reference current value I
GAsk error, ask the trigger angle φ of following one-period according to this error
(N+1)(steps A
7).
Therefore, in the 2nd cycle, with above-mentioned trigger angle calculation process (A
7) in the trigger angle φ that obtains
(2)Trigger controllable silicon 14,16 (steps A
2).As mentioned above, in the 1st cycle, flow through a spot of current i consciously, thus in the 2nd cycle, trigger control, so that under constant current control, increase electric current.In this cycle, also obtain amperometric determination value I
NAnd power-factor angle measured value θ
N(steps A
3, A
4).Below, subsequent cycle is also carried out and above-mentioned same processing, at end setup periodicity N
AEnergising the time, constipation bundle test energising (steps A
5, A
6).
Whether in above-mentioned the 1st test energising, judging has amperometric determination value I
NWith reference current value I
GApproximate to the defined threshold Δ with interior cycle (steps A
8).
Meeting above-mentioned decision condition (A
8) the situation of cycle no one under, period counter is turned back to initial value (N=1), set the trigger angle φ in final cycle in test energising last time simultaneously to the trigger angle initial value register
(NA)(steps A
9), carry out above-mentioned test energising (steps A then again
10→ A
2～A
7).
Like this, will test the trigger angle φ in final cycle in the energising last time
(NA)As the trigger angle initial value in next test energising, be because in the present embodiment the test energising is applied constant current control, so meeting above-mentioned decision condition (A
8) the situation of cycle no one under, the amperometric determination value I in the general final cycle
NBe proximate to reference current value I
G
Usually, by 1 time, maximum 2～3 above-mentioned test energising (A
1～A
7), can obtain meeting above-mentioned decision condition (A
8) cycle.
Then, ask the maximum current I of this resistance welder according to the data that obtain in the above-mentioned test energising
MAX(steps A
11).In this maximum current calculation process, use to meet above-mentioned decision condition (A
8) each cycle in trigger angle φ
(N), amperometric determination value I
N, power-factor angle measured value θ
N, and storer 38 in as the table data and the controllable silicon trigger angle-welding current relative value characteristic (Fig. 2) of storing.
In more detail, by power-factor angle measured value θ
NSelect a controllable silicon trigger angle-welding current relative value family curve.On this family curve, derive and trigger angle φ
(N)Corresponding current relative value %I
RMSComputing following formula (1) is asked maximum current I
MAXValue.
I
MAX＝I
N×100÷％I
RMS ……(1)
With the maximum current operation values [I that obtains
MAX] store storer 38 into and login (steps A
12).Like this, finish and the relevant whole processing of test energising.
Meeting above-mentioned decision condition (A
8) cycle have under a plurality of situations, can be with the maximum current operation values [I corresponding with these cycles
MAX] mean value as typical value, perhaps also can in these a plurality of cycles, determine amperometric determination value I
NBe proximate to reference current value I
GCycle, the maximum current operation values [I that will obtain by the one-period of this decision
MAX] as typical value.
As mentioned above, in the present embodiment,, also apply constant current control equally with formal energising even in the test energising.(steps A in the maximum current calculation process
11) in, in fact only the cycle of constant current state is carried out maximum current I
MAXComputing, so can obtain the very high maximum current operation values [I of precision
MAX].
As the skill and technique of above-mentioned technological thought of development present embodiment, stop energising in the cycle in the time of also can in the test energising, reaching constant current state, this cycle is asked maximum current I
MAX, with this maximum current operation values as the maximum current operation values [I in this resistance welder
MAX].Fig. 5 illustrates the processing procedure that is used for this mode.
In Fig. 5, to each cycle, with amperometric determination value I
NWith reference current value I
GiCompare, when this error or difference are lower than the defined threshold Δ, be judged to be and reach constant current state (step B
5), end the energising after following one-period, transfer to maximum current calculation process (step B
9).Other processing (B
2～B
4, B
6～B
8) and the middle processing procedure (A that tests energising of above-mentioned the 1st embodiment (Fig. 3)
2～A
7) identical in fact.According to the mode (Fig. 8) of the 2nd embodiment, also can access high-precision maximum current operation values [I with minimum required periodicity and arithmetic processing circuit
MAX].
Materials to be welded 24,26 in the test energising preferably uses regular materials to be welded as sample.In this resistance welder, the welding machine main body accounts for the major part of full load impedance to the impedance of welding electrode, and the impedance deal of materials to be welded (24,26) is little, under the situation of smallclothes such as electronic unit, almost can ignore.Therefore, the sample of test energising usefulness also can use suitable conductive component, perhaps also can not use sample, but implements energising under with two welding electrodes, 20,22 direct state of contact.
Then, regular welding energising in the present embodiment is described.After carrying out above-mentioned test energising, at the setting current value [I of hope
S] and periodicity na under, the materials to be welded (24,26) of hope is carried out regular welding energising.The welding energising of present embodiment is controlled by constant current and is carried out.
Setting current value [the I that 28 pairs of microprocessors are given
S], ask trigger angle initial value φ with process shown in Figure 6
1That is, set current value [I by input media 36 inputs
S] back (step C
1), from storer 38, read maximum current operation values [I
MAX] and power-factor angle measured value [θ] (step C
2), by these data [I
S], [I
MAX], the controllable silicon trigger angle-welding current relative value characteristics (Fig. 2) in [θ] and the storer 38 ask trigger angle initial value φ
1(step C
3).In more detail, calculate [I
S] and [I
MAX] ratio (%), with this ratio as current relative value %I
RMS, going up derivation and this %I with [θ] corresponding characteristics curve (Fig. 2)
RMSCorresponding trigger angle φ, with it as trigger angle initial value φ
1Sign in to storer 38.
Fig. 7 illustrates the processing procedure of microprocessor in the welding energising.
If import initiating signals by input/output interface circuit 35 by external unit (not shown), then in initialization process, the various condition data that the corresponding welding schedule (ス ケ ジ ユ-Le) of this initiating signal indication is set derive (step D from storer 38
1).In these condition data, comprise and set current value [I
S], periodicity na and set current value [I with this
S] corresponding trigger angle initial value φ
1
In initial (the 1st) cycle, with above-mentioned initial value φ
1Trigger controllable silicon 14,16 (step D
2).Owing to be in the test energising, to derive maximum current I
MAX, the trigger angle initial value φ that obtains according to this maximum current operation values
1So, as Fig. 8 formula, from the 1st cycle, promptly can be with the approaching current value [I that sets
S] current effective value incoming flow excess current i (I).
For the current i that in the 1st cycle, flows through, measure circuit 34 by welding current and be taken into amperometric determination value I
n, implement required computing (step D as required
3).Then, this amperometric determination value I relatively
nWith the setting current value I
SAsk error, ask the trigger angle φ that following one-period uses according to this error
(n+1)(step D
6).
In the 2nd cycle, with above-mentioned calculation process (D
6) in the trigger angle φ that obtains
2Trigger controllable silicon 14,16 (step D
2).Because in the welding of present embodiment energising, promptly flow through near setting current value [I from the 1st cycle
S] current i (I), so in the 2nd cycle, trigger control so that under constant current control, electric current is finely tuned.Below, subsequent cycle is also carried out and above-mentioned same processing, when the energising of end setup periodicity na, finish welding energising (step D
4, D
5).
As mentioned above, in the present embodiment, by with regular welding energising independently the test energising calculate, estimate maximum current in this resistance welder, the most suitable controllable silicon trigger angle initial value of respectively setting current value when asking each welding energising according to this maximum current operation values, trigger the initial cycle of each welding energising of control with this trigger angle initial value, even so, also can flow through and setting current value [I from the tight back of the beginning of switching on without the channeling conduct energising
S] welding current I unanimous on the whole, ((オ-バ-シ ユ-ト) etc., desirable constant current control can reliablely and stablely obtain good welding quality in the energising of shortest time for ア Star プ ス ロ-プ) and overshoot can not follow upward slope.
Particularly, in the test energising of present embodiment, can only ask the maximum current operation values of further raising precision, and then begin the welding energising with more high-precision controllable silicon trigger angle initial value by the cycle of constant current state.
According to present embodiment, because not channeling conduct energising before each welding energising is tight, so only provide original welding current I to materials to be welded (24,26).Therefore, eliminate the variety of issue of following the guiding energising fully, can reliablely and stablely obtain the welding quality of wishing.In addition, the test of present embodiment energising is only carried out getting final product for 1 time when setting device, and the guiding step mode of energising is compared when switching on each welding, has big advantage aspect energy-conservation.
In the above-described embodiments, apply constant current control and test energising.Yet, also can not apply constant current control, for example use rising shown in Figure 9 (ス テ Star プ ア Star プ) control mode to test energising.In this rising control mode, trigger angle φ gets maximal value in the initial cycle, later on each cycle is slowly reduced with predefined slip.Thus, electric current slowly increases the increment rate of each cycle with regulation later on from minimum value.
In this rising control mode, also can in each cycle, amperometric determination value and reference current value be compared, ask the maximum current operation values by the cycle of the amperometric determination value that obtains being similar to reference current value, in this cycle, stop the test energising.
Controllable silicon trigger angle-welding current relative value characteristic (Fig. 2) that the foregoing description uses is an example, also can use [φ-the I that more simplifies
RMS] characteristic.Generally, power-factor angle is approaching often to each machine, for example is similar to θ=60 °, so get final product with a family curve.In addition, under the situation of the approximate value of using power-factor angle like this, also can omit power-factor angle components of assays (42,44).
As mentioned above, according to the present invention, dispensing with bootstrap energising in each welding energising was promptly flow through and is set current value welding current unanimous on the whole from the 1st cycle, can obtain good welding quality reliably.In addition, test energising of the present invention is only carried out when setting device 1 time, and the guiding step mode of energising is compared when switching on each welding, can obtain big effect aspect energy-conservation.
Claims (2)
1, a kind of resistance weld control method, having with the power-factor angle is in the AC system resistance welder of certain controllable silicon trigger angle-current relative value characteristic of parameter, control controllable silicon trigger angle in each half period of welding energising or one-period, make that alternating current unanimous on the whole flows through with setting current value, it is characterized in that having:
The 1st step is carried out and regular independently test energising of welding energising, and trigger angle, current value and the power-factor angle in being switched on by above-mentioned test asked the maximum current in the above-mentioned resistance welder;
The 2nd step, the operation values of storing above-mentioned maximum current;
The 3rd step to the above-mentioned setting current value in the welding energising of being given, is asked controllable silicon trigger angle initial value by above-mentioned maximum current operation values and above-mentioned controllable silicon trigger angle-current relative value characteristic; And
The 4th step, in above-mentioned welding energising of giving, make initial half period or one-period energising with above-mentioned controllable silicon trigger angle initial value, with with amperometric determination value that flow through in half period or the one-period last time and above-mentioned setting current value between the corresponding controllable silicon trigger angle of relative error make each later half period or one-period energising
Wherein above-mentioned the 1st step has:
The 5th step is set the reference current value that is used for above-mentioned test energising;
The 6th step makes the 1st cycle energising in the above-mentioned test energising with the controllable silicon trigger angle initial value of predefined test energising usefulness;
The 7th step in above-mentioned test energising, compares the measured value and the said reference current value of the electric current that flow through in last time in each cycle and asks error;
The 8th step uses the controllable silicon trigger angle corresponding with above-mentioned relative error that the 2nd cycle in the above-mentioned test energising switched on; And
The 9th step, trigger angle, current value and power-factor angle in the cycle by above-mentioned relative error during less than pre-set threshold are asked above-mentioned maximum current operation values.
2, resistance weld control method as claimed in claim 1 is characterized in that, finishes above-mentioned test energising in above-mentioned relative error in less than the initial cycle of above-mentioned threshold value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15610599A JP3507843B2 (en) | 1999-06-03 | 1999-06-03 | Resistance welding control method and apparatus |
| JP156105/1999 | 1999-06-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1276277A CN1276277A (en) | 2000-12-13 |
| CN1158158C true CN1158158C (en) | 2004-07-21 |
Family
ID=15620428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001043757A Expired - Fee Related CN1158158C (en) | 1999-06-03 | 2000-03-23 | Resistance weld control method and device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3507843B2 (en) |
| KR (1) | KR100650611B1 (en) |
| CN (1) | CN1158158C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100495618B1 (en) * | 2000-12-19 | 2005-06-16 | 주식회사 포스코 | Apparatus and method for controlling the electric power in the mash seam wealding |
| JP2002331361A (en) * | 2001-05-01 | 2002-11-19 | Obara Corp | Memory protecting method for welding control device |
| JP4926397B2 (en) * | 2004-12-15 | 2012-05-09 | 株式会社Ｆｔｓ | Welding control device for seam welding machine |
| CN101733537B (en) * | 2008-11-13 | 2012-01-11 | 贵州黎阳航空动力有限公司 | Resistance welding constant-current control device |
| CN102380701A (en) * | 2010-09-01 | 2012-03-21 | 天津市天大北洋化工设备有限公司 | Power-frequency pulse resistance spot welder for red copper |
| KR101219943B1 (en) * | 2011-11-16 | 2013-01-09 | 강동철 | Method for measuring welding current and an apparatus for monitoring welding current using the same |
| RU2507046C1 (en) * | 2012-09-10 | 2014-02-20 | Общество с ограниченной ответственностью "Дельта-техник" | Method of stabilising contact welding current |
| 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 |
| JP7075705B2 (en) * | 2017-01-24 | 2022-05-26 | 株式会社ダイヘン | Arc welding control method |
-
1999
- 1999-06-03 JP JP15610599A patent/JP3507843B2/en not_active Expired - Fee Related
-
2000
- 2000-03-23 CN CNB001043757A patent/CN1158158C/en not_active Expired - Fee Related
- 2000-05-29 KR KR1020000029069A patent/KR100650611B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010007133A (en) | 2001-01-26 |
| KR100650611B1 (en) | 2006-11-27 |
| JP2000343234A (en) | 2000-12-12 |
| JP3507843B2 (en) | 2004-03-15 |
| CN1276277A (en) | 2000-12-13 |
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