Lincoln Electric LTW1 manual

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Table of contents for the manual

  • Page 1

    • Sales and Service through Subsidiaries and Distributors Worldwide • Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com • World's Leader in Welding and Cutting Products • “LEARNING TO WELD” “APRENDIENDO A SOLD AR” “APPRENEZ À SOUDER” WORKPIECE ARC ARCO ARC WORK CLAMP PI[...]

  • Page 2

    1 1 T ABLE OF CONTENTS Page Learn to Weld .................................................................................................................2 Arc Welding Circuit ....................................................................................................2 Self-Shielded FCAW (Flux Core Arc Welding). ...........................[...]

  • Page 3

    2 LEARNING T O WELD 2 LEARNING T O WELD Welding is a skill that can only be learned by practic- ing. No one can become an accomplished welder simply by reading about it. The following pages will help the inexperienced operator to understand the basics about wire welding and provide guidance to help develop this skill. For more detailed information,[...]

  • Page 4

    3 LEARNING T O WELD 3 SELF-SHIELDED FCA W (FLUX CORE ARC WELDING) Figure 3 illustrates the action taking place in the self- shielded FCAW (Innershield) welding arc. It closely resembles what is actually seen while welding. FIGURE 3 The “ arc stream ” is seen in the middle of the picture. This is the electric arc created by the electric current [...]

  • Page 5

    4 LEARNING T O WELD 4 PROCESS SELECTION By gaining knowledge of the differences between the two processes, you will be able to select the best process for the job you have at hand. In selecting a process, you should consider: For GMAW (MIG) Process 1. Is most of my welding performed on 16 gauge and lighter materials? 2. Can I afford the extra expen[...]

  • Page 6

    5 LEARNING T O WELD 5 Penetration Unless a weld penetrates close to 100% of the metal thickness, a butt joint will be weaker than the material welded together. In the example shown in Figure 7, the total weld is only half the thickness of the material thus the weld is only approximately half as strong as the metal. FIGURE 7 FIGURE 8 In the example [...]

  • Page 7

    6 LEARNING T O WELD 6 Vertical-down Welding Refer to Figure 11 Vertical-down welds are applied at a fast pace. These welds are therefore shallow and narrow and, as such, are excellent for sheet metal. Vertical-down welds may be applied by a table which is found in the Instruction Manual for lighter material. Use stringer beads and tip the gun in th[...]

  • Page 8

    7 LEARNING T O WELD 7 ARC RAYS can burn eyes and skin. When using an open arc process, it Is necessary to use correct eye, head and body protection. Protect yourself and others, read “ ARC RAYS can burn ” at the front of the Instruction Manual supplied with welder. ----------------------------------------------------------------------- 2. The C[...]

  • Page 9

    8 LEARNING T O WELD 8 Helpful Hints • For general welding, it is not necessary to weave the arc, neither forward or backward nor sideways. Weld along at a steady pace. You will find it easier. • When welding on thin plate, you will find that you will have to increase the welding speed, whereas when welding on heavy plate, it is necessary to go [...]

  • Page 10

    9 LEARNING T O WELD 9 MACHINE SET UP FOR THE GMA W (MIG) PROCESS 1. See APPLICATION CHART in the OPERATION section or Application Chart on the inside of wire feed section door for selection of welding wire and shielding gas, and for range of metal thicknesses that can be welded. Also setting the proper con- trols, Drive Roll Orientation and Output [...]

  • Page 11

    10 LEARNING T O WELD 10 3. The Contact Tip to Work Distance (CTWD) The Contact Tip to Work Distance (CTWD) is the distance from the end of the contact tip to the work. See Figure 18. Once the arc has been established, maintaining the correct CTWD becomes extremely important. The CTWD should be approximately 3/8 to 1/2 inch (10 to 12 mm) long. The e[...]

  • Page 12

    11 LEARNING T O WELD 11 TROUBLESHOOTING WELDS Good welds have excellent appearance. To Eliminate Porosity (In order of priority): 1. Check for proper gas flow and reset WFS & Volts on chart inside door. 2. Clean joints from moisture, paint, rust etc. 3. Decrease CTWD with GMAW. 4. Decrease drag angle. 5. Decrease travel speed. NOTE: Always be s[...]

  • Page 13

    1 1 CONTENIDO Page Aprendiendo a Soldar ...................................................................................................2 Circuito de Soldadura por Arco .................................................................................2 Soldadura de Arco Tubular (FCAW) ..............................................................[...]

  • Page 14

    2 APRENDIENDO A SOLDAR 2 APRENDIENDO A SOLDAR La soldadura es una habilidad que s ó lo puede apren- derse mediante la pr á ctica. Nadie puede convertirse en un soldador experimentado simplemente leyendo acerca de soldadura. Las siguientes p á gi- nas ayudar á n al operador sin experiencia a entender los aspectos b á sicos de la soldadura de al[...]

  • Page 15

    3 APRENDIENDO A SOLDAR 3 SOLDADURA DE ARCO TUBULAR (FCA W) La Figura 3 ilustra la acci ó n que se lleva a cabo en el arco de soldadura (Innershield) FCAW autoprotegido. Es muy similar a lo que se observa en una soldadura real. FIGURA 3 En la mitad de la figura se observa el “ flujo de arco ” . Este es el arco el é ctrico creado a trav é s de[...]

  • Page 16

    4 APRENDIENDO A SOLDAR 4 SELECCI Ó N DEL PROCESO Al aprender m á s sobre las diferencias existentes entre los dos procesos, usted podr á elegir el mejor para el trabajo que va a realizar. Al seleccionar el proceso, deber á considerar lo siguiente: Para el Proceso GMAW (MIG) 1. ¿ La mayor í a de mi trabajo de soldadura se realiza con calibre 1[...]

  • Page 17

    5 APRENDIENDO A SOLDAR 5 Penetraci ó n Si la soldadura no penetra casi el 100% del grosor del metal, entonces una soldadura a tope ser á m á s d é bil que el material soldado. En el ejemplo que se muestra en la Figura 7, la soldadura total penetr ó s ó lo la mitad del grosor del material, por lo que ser á aproximadamente la mitad de resisten[...]

  • Page 18

    6 APRENDIENDO A SOLDAR 6 Soldadura Vertical Descendente Consulte la Figura 11. Las soldaduras verticales descendentes se aplican r á pidamente. Por lo tanto, son estrechas y poco profundas, lo que las hace excelentes para las hojas met á licas. Las soldaduras verticales descendentes pueden ser aplicadas por una tabla la cual se encuentra en el Ma[...]

  • Page 19

    7 APRENDIENDO A SOLDAR 7 Los RAYOS del ARCO pueden que- mar los ojos y la piel. Al utilizar un proceso de arco abierto, es necesario usar protec- ci ó n para ojos, cabeza y cuerpo. Prot é jase usted y a los dem á s, lea “ Los RAYOS del ARCO pueden quemar ” al frente del Manual de Instrucci ó n proporcionado a cada soldador. ----------------[...]

  • Page 20

    8 APRENDIENDO A SOLDAR 8 Consejos Ú tiles • P ara soldaduras generales, no es necesario mover el arco, ni hacia adelante ni hacia atr á s o a los lados. Suelde a un ritmo estable. Ser á m á s f á cil en esta forma. • Cuando suelde sobre una placa delgada, se dar á cuenta de que tiene que aumentar la velocidad de soldadura; por otro lado, [...]

  • Page 21

    9 APRENDIENDO A SOLDAR 9 CONFIGURACI Ó N DE LA M Á QUINA PARA EL PROCESO GMAW (MIG) 1. Consulte DIAGRAMA DE APLICACI Ó N en la sec- ci ó n de OPERACI Ó N o Diagrama de Aplicaci ó n en el interior de la puerta de la secci ó n de ali- mentaci ó n de alambre para la selecci ó n del alam- bre de soldadura y gas protector, y para el nivel de gr[...]

  • Page 22

    10 APRENDIENDO A SOLDAR 10 3. La Punta de Contacto Correcta para la Distancia de Trabajo (CTWD) La Punta de Contacto de Trabajo para la Distancia de Trabajo (CTWD) es la distancia desde el extremo de la punta de contacto hasta el trabajo. Vea la Figura 18. Una vez que el arco se ha establecido, es muy importante mantener una CTWD correcta. La CTWD [...]

  • Page 23

    11 APRENDIENDO A SOLDAR 11 LOCALIZACION DE A VER Í AS EN SOLDADURAS Las soldaduras adecuadas tienen una excelente apariencia Para Eliminar la Porosidad (Por orden de prioridad): 1. Verifique el flujo de gas adecuado y restablezca la WFS y Voltios seg ú n el diagrama en la parte inter- na de la puerta. 2. Limpie la humedad, pintura, polvo, etc. de[...]

  • Page 24

    1 1 T ABLE DES MA TI È RES Page Apprentisage du Soudage ............................................................................................2 Le Circuit de Soudage à L ’ Arc...................................................................................2 FCAW (Soudage à L ’ Arc à Noyau Fondant) Auto - Blind é ...................[...]

  • Page 25

    APPRENTISSAGE DU SOUDAGE Le soudage est une habilet é qui ne s ’ acquiert qu ’ avec la pratique. Personne ne peut become devenir un souder accompli seulement en lisant des livres sur le soudage. Les pages suivantes aideront le soudeur inexp é riment é à comprendre les bases du soudage au fil et luidonneront des directives pour lui permettre[...]

  • Page 26

    3 APPRENEZ À SOUDER 3 FCA W (SOUDAGE À L ’ ARC À NOY AU FONDANT) AUT O - BLIND É La Figure 3 illustre l ’ action qui a lieu durant le soudage à l ’ arc FCAW auto - blind é (Innershield). Cela ressem- ble de pr è s à ce qu ’ on voit pendant qu ’ on soude. FIGURE 3 On peut voir le "jet de l ’ arc" au milieu de la figure.[...]

  • Page 27

    4 APPRENEZ À SOUDER 4 S É LECTION DU PROC É D É En acqu é rant plus de connaissances concernant les diff é rences entre les deux proc é d é s, on devient capa- ble de s é lectionner le meilleur proc é d é pour le travail à effectuer. Au moment de choisir un proc é d é , il faut tenir compte des é l é ments suivants : Pour le proc é[...]

  • Page 28

    5 APPRENEZ À SOUDER 5 P é n é tration A moins qu ’ une soudure ne p é n è tre à pr è s de 100% de l ’é paisseur du m é tal, un joint bout à bout sera plus faible que le mat é riau soud é ensemble. Dans l ’ exem- ple qui appara î t sur la Figure 7, la soudure totale n ’ est que de la moiti é de l ’é paisseur du mat é riau, [...]

  • Page 29

    6 APPRENEZ À SOUDER 6 Soudage en Position Verticale Descendante Se r é f é rer à la Figure 11. Les soudures verticales descendantes s ’ appliquent à un rythme rapide. Ces soudures sont pour autant peu profondes et é troites, de sorte qu ’ elles sont excellentes pour les feuilles de m é tal. Les soudures verticales descendantes peuvent ê[...]

  • Page 30

    7 APPRENEZ À SOUDER 7 LES RAYONS DES ARCS peuvent br û ler les yeux et la peau. Lorsqu ’ on utilise un proc é d é à arc ouvert, il est n é cessaire de porter de bonnes protections pour les yeux, la t ê te et le corps. Se prot é ger et prot é ger les autres, lire la partie intitul é e « LES RAYONS DES ARCS peuvent causer des br û lures[...]

  • Page 31

    8 APPRENEZ À SOUDER 8 Indications Utiles • Pour le soudage g é n é ral, il n ’ est pas n é cessaire de b â tir l ’ arc, ni vers l ’ avant ou vers l ’ arri è re, ni sur les c ô t é s. Souder en longueur à un rythme r é gulier. Ce sera plus facile. • Lorsqu ’ on soude sur une plaque fine, il faut aug- menter la vitesse de soud[...]

  • Page 32

    9 APPRENEZ À SOUDER 9 R É GLAGE DE LA MACHINE POUR LE PROC É D É GMA W (MIG) 1. Se reporter au TABLEAU D ’ APPLICATION dans la section FONTIONNEMENT ou au Tableau d ’ Application à l ’ int é rieur de la porte de la section d ’ alimentation du fil pour la s é lection du fil de soudage et du gaz de protection, et pour la gamme d ’é [...]

  • Page 33

    10 APPRENEZ À SOUDER 10 3. La Distance Correcte entre la Pointe de Contact et le Travail (CTWD) La Distance entre la Pointe de Contact et le Travail (CTWD) est la distance depuis l ’ extr é mit é de la pointe de contact jusqu ’ au travail. Voir la Figure 18. Une fois l ’ arc é tabli, il devient extr ê mement impor- tant de maintenir la C[...]

  • Page 34

    11 APPRENEZ À SOUDER 11 SOLUTION DES PROBL È MES DE SOUDURE Les bonnes soudures ont une apparence excellente. Pour É liminer la Porosit é (par ordre de priorit é ) : 1. V é rifier que le flux de gaz est appropri é et r é tablir la WFS et la Tension comme indiqu é sur le tableau à l ’ int é rieur de la porte. 2. Retirer des joints toute[...]

  • Page 35

    NOTES[...]

  • Page 36

    • Sales and Service through Subsidiaries and Distributors Worldwide • Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com • World's Leader in Welding and Cutting Products •[...]