CS211021B1 - Method of welding current control at resistance,especially contact welding and apparatus for making the same - Google Patents
Method of welding current control at resistance,especially contact welding and apparatus for making the same Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000000052 comparative effect Effects 0.000 claims description 3
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 claims 2
- 230000000979 retarding effect Effects 0.000 claims 1
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- 238000010276 construction Methods 0.000 description 2
- 206010047700 Vomiting Diseases 0.000 description 1
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- 238000002844 melting Methods 0.000 description 1
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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
- B23K11/25—Monitoring devices
- B23K11/252—Monitoring devices using digital means
- B23K11/256—Monitoring devices using digital means the measured parameter being the inter-electrode electrical resistance
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Abstract
Description
Vynález sa týká sposobu riadenia zváracieho prúdupri odporovom, najma bodovom zváraní.The invention relates to a method of controlling a welding current in resistive, in particular spot welding.
so svahovitým n^rastaním zváracieho prúdu a zariadenia pre vykonávanie sposobu.with a sloping rise of the welding current and apparatus for performing the method.
V praxi odporového, najma bodového. zvárania, je často potřebné zaručit vysoku a rovnoměrná kvvlitu spojov aj za podmienok zn$čnnéo:/kkoísania . technologických podmienok, ktoré ovplyvňujú zvarací proces a rým aj kvaltu sp^ťia. V prevážnej miere sa súčasná prax uspokojuje s pevným nastavením transformátora a, fázového riadenia výkonu na začiatku zváracieho procesu, čo má udržat počas zvárania ' přibližme rovjjaký zváTaci prúd. Táto možnost zlyháva pri kolísaní napátia eiete, opotřebovaní zváracích elektrod, změnách stavu povrchu zváraného plechu a pri iných změnách, ktoré ovplyvňujú zvárací prúd. Za takýchto okolnosti sa može vyskytnut situácia, že zvárací. prúd poklesne natolko, že vznikne neplnohodnotný zvar, připadne, že zvar nevznikne vobec.In practice resistive, especially point. welding, it is often necessary to guarantee high and even flowability of the joints even under the conditions of staggering. technological conditions, which affect the welding process and rhyme and the quality of the tail. To a large extent, current practice is satisfied with the fixed setting of the transformer and the "phase power control" at the beginning of the welding process, which is intended to maintain approximately the same welding current during welding. This option fails to fluctuate the power supply, wear the welding electrodes, change the surface condition of the welded sheet, and other changes that affect the welding current. In such circumstances, there may be a situation of welding. the current drops to such an extent that an incomplete weld is formed, or the weld does not originate in general.
Sú dalaj známe zariadenia kompenzujúce úfytok napatia v . sieei. Ich poouitie ovšem neeiesi poklesy zváracieho prúdu sposobené inými vplyvmi.There are also known devices for compensating the voltage clamp in. NETWORK. Their use does not, however, bear the welding current drops caused by other influences.
Sú známe aj zariadenia, ktoré regulujú na konštantnú velkost zváracieho prúdu, pripadne inej veličiny, ako například nap^tia na; zvarej alebo příkonu dodávaného do zvaru. Spoločným nedostatkom týchto riešeni je, ie sa neprisposobujú meniacim sa podmienkam vzniku spooa, ako ich ovplyvňujú vlastné zvárané dielce, zvarového spo^, stav povrchu a elektrod a vyiadujú nast:avo/anjLe pri změnách zvávaných hrúbok, maaeeiálu, počtu vrstiev , povrchovej úpravy a podobné. íThere are also known devices which regulate the constant size of the welding current or other quantities, such as the voltages to; weld or power supplied to the weld. The common drawback of these solutions is that they do not adapt to the changing conditions of the spooky formation, as they are influenced by the welded parts themselves, the weld seam, the surface condition and the electrodes, and require adjustments when welding thickness, material, number of layers, Similarly. s
Sú tlei známe zariadenia, ktoré zrovnáv^jú niektorú z energetických veličin zvaru - prúd, nappáie, příkon atd., s vopred nastavenými medznými hodnotami a pri mimooooerančnej hodnotě zmeeanej počas zvaru upravia podlá vopred zadaného programu podrnienky pre další zvar. Xch nedostatkom je, ie ri^adiac^' zásah neoovpyyvn/ten zvar, na ktorom . . sa místila změna, ale až nasledujúci, pre ktorý sa moohi zaHa! podmmenky zase zmennt. Navýše sa tleto systémy. obtiažne nastavujú. Oppimálnn hodnoty nastavenía sa získavajú skusmo., zvlášť pre každý technologický případ.There are known devices which compare some of the energy values of the weld - current, voltage, power, etc., with preset cut-off values and, at the off-tolerance value measured during the weld, adjust the conditions for the next weld according to a predetermined program. The shortcoming is that it controls the interference of the weld on which. . there was a change, but only the following, for which it can be! change the terms again. In addition, these systems. difficult to adjust. The optimum values of the settings are obtained bitterly, especially for each technological case.
Ďalej je známe zariadenie, .ktoré používá s^j^l^c^oite naaastajúci zvárací prud, pricom <aašie naraatanie prúdu sa přeruší, ked rýchlost tepelnej . expanzie zvaru daná . jej časovou deriváciou dosiahne voprednastavenu hodnotu a dalsíe zváranie sa robí pri dosíahnutej hodnotn * prúdu. Nedostatkom tohoto inak velmi dokonalého soosdbu je, že vyžaduje meeanie mechhnnckej veličiny - tepelnej expanzie zvaru. To sposobuje na niaktorých zvárací^ch terojoc0 problémy, Navýše je potřebný špeciálny snímač - převod nik meechaiickej veličiny - tepelnej expanzie na elektrický signál. .Further, a device is known which uses an increasing welding current with which the current jet is interrupted when the thermal speed is reached. weld expansion given. by its time derivation it reaches a preset value and further welding is done at the value current achieved. The disadvantage of this otherwise very perfect soosdbu is that it requires meeania of the mechhnncki magnitude - the thermal expansion of the weld. This causes some welding problems. In addition, a special transducer - the conversion of the meechaic quantity - of the thermal expansion into an electrical signal is needed. .
Vynálezom sa nedossatky uvedených -ϊμ^ϊ do značnej miery oddsránia. Podstata sposobu -110гп1п zvá-nciehd prúdu pri odporovou najmfi bodovom zváaaní, so svahovitým narastaním zváracleho prúdu, podlá vynálezu spočívá^ v eom,,ie narast-anie zvárnciehd prúdu sa preruší, ked . priebeh odporu zvaru ddsínhne hodnotu svojho lokálneho maxima, alebo sa k tomuto maximu pr ibliϋ, takže zváranie dalej pokračuje pri ho^i^í^^n nastave.nia zváracieho prúdu dosáhnutej v okamihu zastavma jeho .The invention will largely eliminate the shortcomings of these. The essence of the method of current welding at resistive at least point weighing, with a sloping increase in the welding current, according to the invention is that the increase in welding current is interrupted when. the course of the resistance of the weld dds to the value of its local maximum, or approaches that maximum, so that the welding continues at the next time the welding current is reached at the moment it stops.
Spósob -110гп11 zvá-acíehd prúdu podlá Vynálezu umooňuUe znrindenir podlá vynalezu, k t o r ého zdroj p.riebehu odporu zvaru je ce? deri.yátor a kompoaátd- s porovnávacím vstupom připojeny na signálový vstup klopného obvo^i^'. Přitom výstup klopného obvodu je připojený na zastavo^í^í^^ vstup generátora pilovitého oriebeho,^ktorý je připojený cez elektrické riadeníe perametrov zvá-ncieOd procesu s nastavovacím vstupom, na zvrací proces . Prioom výstup povelu pre spúš t-anie pily, elektronického -ildrnia parametrov zvá-ncieOd procesu, je připojený na nulovací vstup klopného obvodu, spúššací vstup generátore oíloiiéého priebehu a sáčasne cez onesko-ovicí obvod so vstupom pre nastavenie тевког enia, nahodinový vstup klopného obvodu.The method of 110 [deg.] 11 considers the current of the present invention to allow for a refraction according to the invention, whereby the source of the resistance of the weld is greater than? the deriator and the comparator input component are connected to the flip-flop signal input. In this case, the output of the flip-flop is connected to the stop input of the sawtooth generator, which is connected via the electrical control of the perimeter meters from the setting input process, to the vomiting process. The direct output of the command to start the saw, the electronic child parameter of the process from the process, is connected to the flip-flop reset input, the trigger output of the waveform generator, and simultaneously through the delay circuit with input for adjusting the flip-flop. .
Výhodou sposobu podlá vynálezu je, že urno o nu je vyrovnávat také náhodné a rušivé vonkajš.ie vplyvy, ako je například šuntovanie prúdu susedným·zvarom alebo cez náhodný kontakt zváraných dielcov, ktoré by inak viedli k poklesu prúdu tečúceho cez miesto •zvaru a tým k vzniku nekvalitných spojov. Navýše je sposob podlá vynálezu schopný prísposobit zváraci prúd situáciam vznikajúcim v dosledku záměru koпкгикtóra, ako· sú rozne hrůbky zváraných plechov a rožne počty vrstiev, ktoré sa menia poČas zváracej operácie na jednej konntrukcii. To·ulahčuje prácu technologa pri nastavovaní zváracích podmienok. Po určítom pořiatočnom nastavená, prisposobenie zvá^c^eho prúdu meniacim sa technologie kým rrUaisnkaa vykoná zar^deate podlá . ' vynálezu samo ·An advantage of the method according to the invention is that the urn is to compensate for such accidental and disturbing external effects, such as shunting the current through an adjacent weld or through accidental contact of the welded parts, which would otherwise lead to a drop in the current flowing through the weld. to create poor connections. In addition, the method according to the invention is capable of adapting the welding current to situations resulting from the intention of the co-generator, such as the varying depths of the welded sheets and the different numbers of layers that change during the welding operation on a single construction. This makes it easier for the technologist to adjust the welding conditions. After the initial setting has been set, adjusting the current flow to the changing technology until the switch is done according to the current. The invention itself
Výhodou · sposobu a zar^deuj podlá vynálezu je daaej, že korekcia . zváracieho prúdu nastává počas, vlastně na začatku .toho zváracietio procesu, kde bola zístená změna podmienok, ktorá ei takú . korekciu vyžadi^jje.An advantage of the method and apparatus of the invention is that the correction. the welding current occurs during, in fact, the beginning of this welding process, where a change in the conditions that has been found has been found. correction is required.
Zariadenie podlá vynálezu nevyžaduje.zvláštný.snímaé, alebo prevodnik a je použitelné ako na stacionár nych, tak aj na kl éeŠ llových bodových zváracích strojoch.The device according to the invention does not require a special sensor or transducer and is applicable to both stationary and key spot welding machines.
Přiklad prevedenia vynálezu je znázorněný na připojených výkresoch, kde obr, 1 vuje typický priebeh odporu zvaru a narastanie priemeru zvarovej šošovky pri konStantinom nastaveni zváraci^^ho prúdu, obr. 2 porovnává priebeh odporu zvaru a naraslan^ pr i emeru zvarovejAn example of an embodiment of the invention is shown in the accompanying drawings, in which Fig. 1 shows a typical course of the resistance of the weld and an increase in the diameter of the welding lens at a constant setting of the welding current. 2 compares the course of the resistance of the weld and the build-up at the weld diameter
Šošovky pri nařastajúcom, číže svahovom priebehu zváracieho prúdu, obr. 3 vysveěluje princip funkcie sposobu podlá vynálezu, ako sa od priebehu odporu zvaru, respektive jeho derivácie odvádza signál pře zast^nie · naristinii zváracieho prúdu a . obr. 4 znázorňuje přiklad prevedenia zariadenia podlá vynálezu.The lenses with the increasing slope of the welding current, FIG. 3 illustrates the principle of the operation of the method according to the invention, how a signal for stopping the welding current a is removed from the course of the resistance of the weld or its derivative, respectively. Fig. 4 shows an exemplary embodiment of a device according to the invention.
Na koňštannnom nastaveni zváracieho prúdu je typický priebeh odporu zvaru R znázorněný' křivkou £. Křivka ·2 ukazujeiako súčasne priom narastá priemer zvarovej áošovky D. Je vidiet, že zhruba v okamihu keď odpor zvaru R.do siahol svoje lokálně maximum · Rmax , začina sa utvárať tavná zvarová. šošovka, ktorej priemer D_ s postupom zvárania v čase t narastá.At the constant setting of the welding current, the course of the welding resistance R is represented by the curve £. The curve · 2 shows at the same time the diameter of the welding lens D is increasing at the same time. It can be seen that around the moment when the resistance of the weld R.do reached its locally maximum · Rmax, the fusion weld begins to form. a lens whose diameter D increases with the welding process at time t.
Keď necháme zvárací prúd .1 počas zvárania svahoo.ite narasta^, křivka 3_, priebeh odporu R, křivka £, opáč dosáhne 'časom maximum Rmmx. Tomuto maximu přibližné odpovedá počiatok vzniku tavnej zvarovej šošovky, no jej priemer D., křivka £, rýchlo narastá so vzrasta j úcou hod.notou zváracieho prúdu £. Strmost rastu priemeru D je podstatné vyššia ako v případe konšta-ntného nastavenia zváracieho prúdu I_, až časom dojde k energetčkkímu presýteniu zvaru a výstreku natoeného materLálu zo zvaru.When the welding current 1 is allowed to grow during welding, the curve 3, the course of the resistance R, the curve 6, again reaches a maximum of Rmmx over time. This maximum corresponds approximately to the start of the welding fusion lens, but its diameter D., curve £, rapidly increases with increasing value of the welding current.. The steepness of the diameter D increase is substantially higher than in the case of a constant adjustment of the welding current 7 until the energy over-saturation of the weld and the sputtering of the material to be welded occur over time.
Expeeimennálne sa zletílo, že čím rýchlejšie narastá zvá^ci prúd £, tým skor nastane maximum Rmax priebehu odporu·zvaru R a tým skór sa objavi počiatok naristinia tavnej zvarovej šošovky.It has exploded exponentially that the faster the current increases, the sooner the maximum Rmax of the weld resistance R occurs, and the score at the onset of the melting of the fusion weld lens occurs.
Ca.lej · sa zlatilo, že pri zmene v^k^ších podmienok, ako například zváčšenie hrůbky alebo počtu zváraných plechov alebo vzrast priemeru elektrod, například ích opotřebováním, Rmax nastáva neskor, to · znamená pri vyšších hodnotách zváracieho prúdu ^1. Ak sa prito^m z príslušných hodnot .1 1_, rUpovedajúcm nassatiu Rmax v časoch tmax utvoří poddel I/De , ktorý sa nazýva intenzita zvá^c^eho procesu a je o ňom známe, že pre jeden druh ma^^álu je invariantou zvá^c^eho procesu, kde De je priemer zváracích elektrod. Tento poddel je pre rozne hrůbky a počty zváraných plechov aj pre rozne priemery elektrod, · pri inak konátantných ·podmienkach konstantný. Z toho · vyplývá, že Čas tmax, prí ktorom nastáva maxi^mum · odporu zvaru Rmmx, j e invariantou zvá^c^eho procesu, ktorá označuje, že sa dosiahLo takej hodnoty z-vá^cieho prúdu I 1 , ktorá je primeraná energetícýým nárokom právě zváraného вро^.It has also been appreciated that, when changing conditions such as increasing the depth or number of sheets to be welded or increasing the diameter of the electrodes, for example by wear, Rmax occurs late, i.e. at higher welding current values. If, in addition, the respective values 11, corresponding to the saturation of Rmax at times tmax, a subdivision I / De is formed, which is called the intensity of the involuntary process and is known to be invariant for one type of material. wherein the De is the diameter of the welding electrodes. This subdivision is constant for different thicknesses and the numbers of welded sheets and for different electrode diameters. It follows that the time t max at which the maximum resistance of the weld Rmmx occurs is the invariant of the welding process, which indicates that a value of the current of current I1, which is adequate to the energy the right welded вро ^.
Na tomto základe funguje sposob podlá vynálezu. Zváraci prúd jL sa nechá svahhoíte nařastaf podlá křivky 6.· Pri.o^m sa meeia priebeh £ odporu zvaru R a · súčasne sa robi · jeho derivácia dR/dlt, křivka · V době tmax, keď priebeh R dosahuje lokálně maximum Rmax, priebeh 0 derivácie dR/dt prechádza nulou. Tento stav sa detekuje a na základe .takto získaného signálu sa 3 211021 zastaví daišie nařastanío zváracieho prúdu - v‘. hodnotě I 1 . Zváranio sa potom do^^n?.í pri konštantnej hodnotě zváracieho prúdu, priebeh I- Z technických dovodov konštrukcie elektronickej čassi moe'byt výhodné detekovat - hodnotu ' 10 deri-vicie dR/dt, dostatočne blízku nule, takže signál z prerutonia rastu zváracielio prúdu £ sa - dává o časový interval At skór ako nastane naxinun odporu Rmmx. Časový - interval At nože byt porovnatelný alebo menSi- ako jedna polporíóda siotovoj froOvencie 50 Hz, to - I 0,01 -s v případe běžných zváracích zariidoní.On this basis, the method according to the invention works. The welding current jL is allowed to rise according to curve 6. · When the resistance resistance curve R is measured, and · at the same time its derivative dR / dlt, the curve is · curved · At time tmax, when the R curve locally reaches the maximum Rmax, waveform 0 of the dR / dt derivative passes zero. This state is detected and, based on the signal obtained, 3 211021 stops any further increase in the welding current - v '. value I 1. Welding is then performed at a constant welding current value, and the course of the electronic part of the electronic component construction can be advantageously detected at a value of 10 dI / dt sufficiently close to zero so that the signal from the growth prerutonium welding current σ is given by the time interval Att score before the naxinun of resistance Rmmx occurs. The time interval n of the knife may be comparable to or less than one half-phase of a frequency of 50 Hz, i.e. 0.01 in the case of conventional welding devices.
Sposo.b ríidonii zváracieho prúdu pri odpoírovom, najma bod ov on zváraní, podlá vynálezu Otorého zd-roj 11 priebehu- odporu zvaru je - cez derivátor umOe^ιljo zariadenie podlá vynálezu, a komppaátor 13 s porovnávacím vstuporn 19 připojený na signálový vstup -20 klopného obvoduThe welding current source 11 is through a differentiator of the device according to the invention, and the comparator 13 with the comparator input 19 is connected to the signal input -20. flip-flop
14. Přioom výstup klopného obvodu 14' je -připojený na zastavovaci vstup - 23 goneeátora 15 pilovitého priebehu, ktorý jo připojený coz ' elektronické riidenie 16 parametrov zváracieho procesu s nastavovacím vstupom 25_, na zvárací proces -17. ' Přitom výstup 26 povelu pre spúŠtanio pily, elektronického riidonii 16 parametrov 2váraciohr procesu, jo připojený na nulovací vstup 22 klopného obvodu £4, spúútací vstup 24 ganeorátora 15 pil^ovié^l^o priebehu a súčasne coz oneskorovací obvod 18 so vstupom 2_7 pre nastav-onio oneskorenia, na hodinový vstup 21 klopného obvodu 14.14. The output of the flip-flop 14 'is connected to the stop input 23 of the sawtooth goneelator 15, which is connected via an electronic control 16 of the welding process parameters with the adjusting input 25, to the welding process -17. In this connection, the output 26 of the command to start the saw, the electronic control 16 of the process start parameters, is connected to the reset input 22 of the flip-flop 4, the trigger input 24 of the ganeorator 15 and the delay circuit 18 with the input 27. adjust the delay, to the clock input 21 of the flip-flop 14.
Činnost zariadenie pod lá vynálezu Spočívá- v tom, že - signál zo zdroji 11 priebehu odporu zvaru - sa privádza na derivátor £2, ktorúho výstup jo pripojený na ootappiátor 13 s porovnávacím vstupom £2* Κοπρη^^γ 13 odhhiujo nastatie maxima odporu a dává povel klopnému obvodu £4, ktorý překlopí a svojip výstupom pripo^nným na - zastavovat! vstup 23 generátora 15 ρílrvitého priebehu zastaví rast pily. Týn 8a zastaví - aj -rast- zvá^ioho prúdu, ktorý jo určovaný připojením výstupu geneoátori 15 pílrviéébr prOt^e hiú coz elektronické riidenio 16 parapetrov zváricieho procesu s nastavovacím vstupom 25 na žvárací proces 1 7. Prioon výstup 26 povelu pro spúútanio pily elektronického riidenia 16 parametrov zvánneho procesu jo připojený na- nulovicí. vstup -22- klopného obvodu 14 a spúútací vstup 24 generátora 15 piloviéého priebehu, čin sa pri spustení. pily a tým ij narastáj ucoho zváracieho - prúdu od blokuje klopný -obvod 1 4. Биса^ no jo výstup 2 6 povelu pre spúStanio pily pripbjaný cez meskooovac í obvod 18 so vstupom 27 pre nistivenie oneskkoenia, na hodinový-vstup -21 klopného obvodu £4. Tým jo zabezpečené blokovinio počas prvých 2 až 5 period.The operation of the device according to the invention consists in that - the signal from the weld resistance source 11 - is applied to a derivative 62, the output of which is connected to an ootapiator 13 with a comparative input 62, to estimate the resistance maximum and it commands the flip-flop 4, which flips and stops with its output connected to it! the inlet 23 of the friction wave generator 15 stops the growth of the saw. The shadow 8a also stops increasing current, which is determined by connecting the output to the generator 15 of the welding process with an electronic control of the 16 parapeters of the welding process with an adjusting input 25 for the welding process 17. Control of 16 parameters of the process is connected to zero. the flip-flop 14 input and the flush-up generator 24 of the saw waveform generator 15, act upon start-up. The output 2 6 of the command to start the saw connected via the mesoocation circuit 18 with the delay 27 input 27 to the flip-flop clock input -21 is increasing. 4th This ensures blokovinio for the first 2 to 5 periods.
Spósob a ziriadonie podlá vynálezu - možno využžt pro autopaiické riidenio zvάraiί^^hr procesu bodového odporového zvárinii.The method and ziriadonia according to the invention can be used for autopaiotic control of the point resistance welding process.
Claims (2)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS80549A CS211021B1 (en) | 1980-01-28 | 1980-01-28 | Method of welding current control at resistance,especially contact welding and apparatus for making the same |
DE19803048488 DE3048488A1 (en) | 1980-01-28 | 1980-12-22 | METHOD FOR WELDING CURRENT CONTROL FOR RESISTANT WELDING, IN PARTICULAR FOR SPOT WELDING, AND ARRANGEMENT FOR CARRYING OUT THIS METHOD |
HU8113A HU189489B (en) | 1980-01-28 | 1981-01-05 | Method for controlling welding current of resistance welding, preferably point welding, furthermore apparatus for carrying out the method |
CH25/81A CH650185A5 (en) | 1980-01-28 | 1981-01-06 | METHOD FOR WELDING CURRENT CONTROL IN RESISTANT WELDING, DEVICE FOR CARRYING OUT THE METHOD AND USE THEREOF. |
SU817771589A SU1316769A1 (en) | 1980-01-28 | 1981-01-07 | Method and apparatus for controlling the welding current in resistance welding |
DD81226943A DD158166A3 (en) | 1980-01-28 | 1981-01-09 | METHOD FOR WELDING CIRCULAR CONTROL IN RESISTANCE WELDING, ESPECIALLY SPOT WELDING, AND DEVICE FOR THIS PROCESS |
GB8101257A GB2068147B (en) | 1980-01-28 | 1981-01-15 | Welding current control in resistance welding |
IT19217/81A IT1135092B (en) | 1980-01-28 | 1981-01-20 | COMMAND PROCEDURE OF THE ELECTRIC WELDING CURRENT FOR POINT WELDING, AND DEVICE FOR THE USE OF THAT PROCEDURE |
FR8101212A FR2474367A1 (en) | 1980-01-28 | 1981-01-23 | METHOD FOR REGULATING THE WELDING CURRENT IN THE CASE OF RESISTOR WELDING, IN PARTICULAR POINT WELDING, AND DEVICE FOR CARRYING OUT SAID PROCESS |
JP1029281A JPS56128685A (en) | 1980-01-28 | 1981-01-28 | Method and system for controlling welding current in resistance welding, spot welding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS80549A CS211021B1 (en) | 1980-01-28 | 1980-01-28 | Method of welding current control at resistance,especially contact welding and apparatus for making the same |
Publications (1)
Publication Number | Publication Date |
---|---|
CS211021B1 true CS211021B1 (en) | 1982-01-29 |
Family
ID=5337741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CS80549A CS211021B1 (en) | 1980-01-28 | 1980-01-28 | Method of welding current control at resistance,especially contact welding and apparatus for making the same |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS56128685A (en) |
CH (1) | CH650185A5 (en) |
CS (1) | CS211021B1 (en) |
DD (1) | DD158166A3 (en) |
DE (1) | DE3048488A1 (en) |
FR (1) | FR2474367A1 (en) |
GB (1) | GB2068147B (en) |
HU (1) | HU189489B (en) |
IT (1) | IT1135092B (en) |
SU (1) | SU1316769A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4503311A (en) * | 1983-05-25 | 1985-03-05 | General Motors Corporation | Method and apparatus for detecting the onset of melting in a resistance spot weld |
JP2510377B2 (en) * | 1992-05-01 | 1996-06-26 | 株式会社ナ・デックス | Welding controller |
-
1980
- 1980-01-28 CS CS80549A patent/CS211021B1/en unknown
- 1980-12-22 DE DE19803048488 patent/DE3048488A1/en active Granted
-
1981
- 1981-01-05 HU HU8113A patent/HU189489B/en unknown
- 1981-01-06 CH CH25/81A patent/CH650185A5/en not_active IP Right Cessation
- 1981-01-07 SU SU817771589A patent/SU1316769A1/en active
- 1981-01-09 DD DD81226943A patent/DD158166A3/en not_active IP Right Cessation
- 1981-01-15 GB GB8101257A patent/GB2068147B/en not_active Expired
- 1981-01-20 IT IT19217/81A patent/IT1135092B/en active
- 1981-01-23 FR FR8101212A patent/FR2474367A1/en active Granted
- 1981-01-28 JP JP1029281A patent/JPS56128685A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2474367A1 (en) | 1981-07-31 |
GB2068147A (en) | 1981-08-05 |
FR2474367B3 (en) | 1982-06-11 |
DE3048488A1 (en) | 1981-09-10 |
CH650185A5 (en) | 1985-07-15 |
JPS56128685A (en) | 1981-10-08 |
IT8119217A0 (en) | 1981-01-20 |
DD158166A3 (en) | 1983-01-05 |
HU189489B (en) | 1986-07-28 |
DE3048488C2 (en) | 1988-08-11 |
GB2068147B (en) | 1984-03-14 |
SU1316769A1 (en) | 1987-06-15 |
IT1135092B (en) | 1986-08-20 |
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