CS196869B1

CS196869B1 - Connection for automatic guiding of the welding burner following the welded joint with simulaneous tracking the weld quality by means of the alcalic emission

Info

Publication number: CS196869B1
Application number: CS823077A
Authority: CS
Inventors: Dusan Racko
Original assignee: Dusan Racko
Priority date: 1977-12-09
Filing date: 1977-12-09
Publication date: 1980-04-30

Description

Predmetom vynálezu je zapojenie automatického vedenia zváracieho horáka po zvarovom spoji so súčasnou kontrolou kvality zvaru pomocou akustickej emisie.It is an object of the invention to engage an automatic welding torch guide along a weld joint with simultaneous acoustic emission control of the weld quality.

Pri zváraní tvarové náročných zvarových spojov alebo pri zváraní velkorozměrných zvarkov, kde dielce sú zostavené s velkými odchýlkami, je potřebné zvárací horák viesť presne nad miestom spoja a takto zabezpečovat dokonalý a rovnoměrný prievar v celej jeho dlžke. V súčasnosti sú známe zariadenia, ktoré priamo mechanicky kopírujúcim sposobom vedú zvárací horák nad spojom. Ďalej je známe snímanie elektrokontaktné, fotoelektrické, indukčně, pneumatické, rádioaktívne a pod. Všetky tieto zariadenia majú značné obmedzene použitie, nakolko sú poměrně zložité, ich snímače sú velkých rozmerov, čo má za následok, že nie je možné zváranie v stiesnených priestoroch. Ďalšou nevýhodou je, že neumožňujú zároveň vykonával aj kontrolu kvality zvarového spoja.When welding demanding welded joints or welding large-dimensioned welds, where the components are assembled with large deviations, the welding torch must be guided exactly over the joint and thus ensure a perfect and uniform weld over its entire length. At present, devices are known which direct the welding torch directly over the joint in a mechanically copying manner. Electrocontact, photoelectric, inductive, pneumatic, radioactive and the like sensing are also known. All of these devices have considerable limited use, as they are relatively complex, their sensors are large in size, making welding in confined spaces impossible. Another disadvantage is that they do not simultaneously perform the quality control of the weld joint.

Vyššie uvedené nedostatky sa vynálezom do značnej miery odstránia. Zapojením podlá vynálezu, ktorého podstata spočívá v tom, že dvojica snímačov akustickej emisie je připojená na dva zosilovače striedavého prúdu, ktoré sú připojené na zdroj sieťovej frekvencie, na ktorého výstup je sériovo připojený zosilovač striedavého prúdu, servomotor a redukcia otáčok, ku ktorej je připojený zvárací horák, pričom 1'ubovolný z dvojice snímačov je připojený cez zosilovač striedavého prúdu na Irekvenčný filter, ten na výkonový zosilovač, počítač impulzov, digitálno-analógový převodník, na ktorého výstup je připojený signalizačný indikátor hodnoty akustickej emisie.The above-mentioned drawbacks are largely eliminated by the invention. The circuit according to the invention is characterized in that the pair of acoustic emission sensors is connected to two AC amplifiers which are connected to a mains frequency source to which an AC amplifier, a servomotor and a speed reducer to which it is connected are connected in series. a welding torch, wherein any of the pair of sensors is connected via an AC amplifier to an frequency filter, one to a power amplifier, a pulse counter, a digital-to-analog converter, the output of which is connected to an acoustic emission signaling indicator.

Zapojením podlá vynálezu sa dosiahne, že zváracia hubica je vedená presne po zvarovom spoji, čím sa dosiahne dokonalý a rovnoměrný prievar zvarového spoja po celej dlžke, za súčasnej kontroly priebehu zváracieho procesu, kontrolovaného na principe snímania akustickej emisie.By engaging the present invention, it is achieved that the welding nozzle is guided exactly along the welding joint, thereby achieving a perfect and uniform weld seam over the entire length, while controlling the progress of the welding process controlled by the principle of acoustic emission sensing.

Zapojenie pre automatické vedenie zváracieho horáka po zvarovom spoji so súčasnou kontrolou kvality zvaru pomocou akustickej emisie je znázorněné na pripojenom výkrese. Snímače 1 a 2 sú připojené na zosilovače striedavého prúdu 4 a 5, ktoré sú připojené na zdroj sieťovej frekvencie 3, na ktorého výstup je sériovo připojený zosilovač striedavého prúdu 6, servomotor 7 a redukcia otáčok 8, ku ktorej je připojený zvárací horák 9, k servomotoru 7, zosilovaču striedavého prúdu 6 a zdrojů sieťovej frekvencie 3 je paralelné připojená korigujúca spatná vazba, tvořená tachogenerátorom 10 a RC členom 11, pri196 889The wiring for automatic guidance of the welding torch along the weld joint with simultaneous acoustic emission control of the weld quality is shown in the attached drawing. The sensors 1 and 2 are connected to AC amplifiers 4 and 5, which are connected to a mains frequency source 3, to which an AC amplifier 6, a servomotor 7 and a speed reducer 8, to which a welding torch 9 is connected, are connected in series. servomotor 7, AC amplifier 6 and mains frequency sources 3 is connected in parallel a correcting feedback, consisting of a tachogenerator 10 and an RC member 11, at 196 889

196 869 čom Íubovoíný snímač 1, 2 je připojený cez zosilovače striedavého prúdu 4, S na frekvenčný filter 12, ten na výkonový zosilovač 13, počítač impulzov 14, digitálno-analógový převodník IS, na ktorého výstup je připojený signalizačný indikátor hodnoty akustickej emisie 18.196 869, any sensor 1, 2 being connected via AC amplifiers 4, S to a frequency filter 12, one to a power amplifier 13, a pulse counter 14, a digital-to-analog converter IS, to which an acoustic emission value signaling indicator 18 is connected.

Snímače 1 a 2, umiestnené symetricky vzhladom na zvarové hrany 18 na povrchu zvarenca 17, snímajú akustické události zo zvarového spoja. V případe přesného chodu zváracieho horáka 9 po zvarovom spoji sú snímače 1 a 2 rovnako vzdialené od zdrojov akustickej emisie tak, že táto ich dosiahne v rovnakom čase. V případe vychýlenia zváracieho horáka 9 z miesta zvarového spoja je porušená symetria a akustická emisia dosiahne jeden z dvojice snímačov skůr napr. snímač 1 a tento je aktivovaný a vyšle signál cez zosilovač striedavého prúdu 4 k zdrojů sieťovej frekvencie 3, ktorý cez zosilovač striedavého prúdu 6 spustí do chodu servomotor 7, ktorý cez redukciu otáčok 8 usměrní zvárací horák 9 na střed zvarového spoja. V případe vybočenia zváracieho horáka 9 smerom k snímačů 2 je aktivovaný snímač a celá činnost sa opakuje opačným smerom. Pre korigovanie pohybu zváracieho horáka 9 je v zapojení zaradený tachogenerátor 10 aSensors 1 and 2, located symmetrically with respect to the weld edges 18 on the surface of the weld member 17, sense acoustic events from the weld joint. In the case of a precise operation of the welding torch 9 along the weld joint, the sensors 1 and 2 are equidistant from the sources of acoustic emission so that they reach them at the same time. In the case of deflection of the welding torch 9 from the location of the weld joint, symmetry is violated and the acoustic emission reaches one of the pair of skin sensors e.g. sensor 1 and this is activated and sends a signal through the AC amplifier 4 to the mains frequency sources 3, which via the AC amplifier 6 actuates the servomotor 7 which directs the welding torch 9 to the center of the weld joint by reducing the speed 8. In the event of the welding torch 9 deflecting towards the sensors 2, the sensor is activated and the entire operation is repeated in the opposite direction. To correct the movement of the welding torch 9, a tachogenerator 10a is provided in the circuit

PREDMETSUBJECT

Claims

196 869 to which any sensor 1, 2 is connected to alternating current amplifiers 4, S to a frequency filter 12, to a power amplifier 13, to a pulse computer 14, to a digital-to-analog converter 1S to which a value signaling indicator is connected Acoustic emission 18. Sensors 1 and 2, placed symmetrically on the weld edges 16 on the surface of the weld 17, sense acoustic events of the weld joint. In the case of a precision welding torch assembly 9, the welded joints of the sensors 1 and 2 are equally spaced acoustic emission sources such that they reach the same time. In the case of deflection of the welding torch 9 from the welded joint, the symmetry is disturbed and the acoustic emission reaches one of the pair of scanners, e.g. sensor 1 and this is deactivated, and sends a signal through the amplifier 4 to the network frequency sources. 3, which actuates the servomotor 7 via an alternating current amplifier 6 which, through a speed reduction 8, directs the welding torch 9 to the center of the weld joint. When the welding torch 9 is deflected, the sensor 2 is activated and the operation is repeated in the opposite direction. Reconstruction of the welding torch motion 9 wiring phenomenon included tachogenerator 10 and PRE DMET The wiring for automatic welding of the welding torch over the weld joint with simultaneous quality control of the weld is characterized in that the sensors (1, 2) are connected to the amplifier a current (4, 5) that is connected to a power supply source (3) to which the amplifier is connected in series (6), a servo motor (7) is a speed reduction (8) to which the welding torch is connected ( 9), to the servomotor (7), from the RC member 11, by which the back-up is formed, the connection according to the invention can also at the same time control the quality of the welded joint during welding, in particular hot-cracking in the welded joint. 1, 2, which is connected to the amplifier 4, 3, by which they are amplified, go to frequency filter 12, and The amplifier 13 is amplified in the power amplifier 13 and registered by the pulse counter 14. In the event of a crack in the welded joint, the degree of acoustics is increased. The number of acoustic emission pulses is transmitted to the digital-to-analog converter 13 for voltage. If the elevated voltage corresponding to the increased acoustic emission exceeds a set threshold value, this is indicated by the acoustic emission value signaling indicator 18. The connection according to the invention finds application where its use is more advantageous to the prior art system, in particular the control of the welding process house for increased operational safety welded thick-walled weldments, where the repeated welding of welded seams increases the increased requirements for welders of natural arc welding. In the present invention, an alternating current generator (6j and a network frequency source (3)) is provided with a parallel corrective sleep bond formed by the generator (10) and the RC member (11), wherein any sensor (1, 2) is connected via an amplifier an alternating current (4, 5) to a frequency filter (12), that to a power amplifier (13), a pulse computer (14), and a digital-to-analog converter (15) to which the acoustic signaling indicator is connected emissions (18)