What is the travel angle? so does a slight push angle of up to about 10 degrees. Travel angles beyond 20 to 25 degrees can lead to more spatter, less penetration and general arc instability. Move too slow and you'll end up with a fat weld bead and likely too much heat going into your work plates. Normally, a small variance of the work angle will not affect the appearance or quality of a weld; however, when undercuts occur in the vertical section of a fillet weld, the angle of the arc should be lowered and the electrode directed more toward the vertical section. Also, don't overweld or make a weld that is larger than necessary for the sake of joint strength—this may lead to burn-through. This setting allows you to increase the current above the set output amperage if your arc starts to fizzle out. When learning any new process you'll likely start off doing things wrong. M is for manipulation of electrode. Travel angle is defined as the angle relative to the gun in a perpendicular position. This is the relationship between the torch and line of travel. Held farther away, the electrode produces less heat and more spatter. Producing a weld bead that's the right size, shape and depth involves many variables. A standard traveling angle should be between 5 – 15 degrees. google_ad_width = 120; With a fillet (tee) weld, hold the rod or wire (regardless of weld process) at a 45° angle between the two pieces of metal. Pull b. This is the relationship between the torch and line of travel. When you drag your torch or electrode, the tilt is directed towards the puddle, which helps with penetration and achieving a thick bead. google_ad_slot = "6853920422"; This angle can also be used to partially define the position of guns, torches, rods, and beams. As a rule of thumb, in stick welding arc length should match the diameter of the electrode metal. Hold the electrode perpendicular to the joint, and then tilt the top in the direction of travel approximately 5 to 15 degrees. Quenching plates after welding (to cool them down) is a practice that's generally frowned upon after the first semester of welding school. For a 2F horizontal Tee, I used a slight drag pull angle of around 5-10 degrees. In other words, if you're using a 1/8 inch rod, hold it 1/8 inch from the joint surface. For most wire welding applications, this angle is 15 to 30 degrees. It comes down to machine settings, electrode angle and travel speed. The principle of metal cored wire welding is given in the picture below. That's because the quench has a sort of traumatizing effect to the metal and can make it brittle. Some welds are covered by specific codes that prohibit peening so you should check the weld specification before peening. Needless to say, the angle of your beveled sides should be appropriate for the thickness of the metal and the welding process being used. In order to see the joint and puddle, the welder may tip the rod up to 10 degrees in the direction of travel, or sometimes against the direction of travel. downhill mig can be effective for up to 1/4" thick if done right, but there are no guarantees. Naturally, the techniques are somewhat different because of the equipment involved is different. The work and travel angle is the angle you have the torch at in relation to the base metal (where you are going to weld). A travel angle of 0° to 10° (i.e., the electrode perpendicular or mostly perpendicular to the plate) will result in more weld penetration. In order to see the joint and puddle, the welder may tip the rod up to 10 degrees in the direction of travel, or sometimes against the direction of travel. There are plenty of other size factors to consider, but metal thickness usually comes first. What gun travel angle is recommended for GMAW-P aluminum? You can increase the length of the arc to reduce heat to the puddle or to limit the deposition of weld metal. Travel speed is the rate at which the electrode travels along a weld seam. Your joints, beveled edges, grinded root faces and surfaces should fit together in a smooth and uniform manner before you start the weld. The first is the work angle, which is the relationship between the joint and the torch (or rod). A steady motion is the most basic technique and requires the MIG welder be set exactly as needed. Held close to the work plates, the current and heat in the weld remains high. The more the travel angle, the welds result in more spatter, less penetration, and the instability of the arc. Electrode angle is pretty forgiving as long as the arc length is tight. Move the arc backward over the crater, and then move forward again and continue the weld. Travel Angle: the degree of the travel angle, whether a push or drag travel angle, affects how much of the arc force is directed down into the base plate. As a student, it's easy to assume that once the metal heats up, everything falls together naturally and all the little rough spots will disappear like magic. Going beyond 25 degrees increases spatter decreases arc stability and leads to less penetration. Travel Angle – The angle less than 90 degrees between the electrode axis and a line perpendicular to the weld axis, in a plane determined by the electrode axis and the weld axis. Although the photos above don't show it, too long of an arc can cause porosity (air bubbles) inside the weld, spatter on the base metal and undercutting at the toes of the joint. Arc welding students remember most of them by reciting the acronym "CLAMS", since each letter stands for a welding parameter. While some stick electrodes are designed to penetrate through rust and millscale, those impurities can still cause problems. The travel angle is the angle between a line perpendicular to the weld axis and the electrode. Heat Dispersal: Different metals disperse heat differently. If the angle reaches 20-25 degrees it’s likely to reduce the penetration, increase the level of spatter and may even interfere with the stability of the arc. In a wirefeed operation (i.e. This procedure fills the crater and prevents porosity and slag inclusions. The work angle is the position of the gun relative to the welding joint’s angle. The torch is held at approximately a 45 degree angle from the vertical in the direction of welding, as shown in figure 11-4. Work angle is especially important in multiple-pass fillet welding. Manipulation - This refers to the movement of the welder's hand as he or she guides the electrode along the joint. And while low-carbon steel is much easier to work with than other metals, you should still adopt the habit of cleaning or grinding the areas you plan to weld. In MIG/flux cored, the machines provides Constant Voltage (CV), so the welder usually only sets the current. 7-16). //-->, Welder Qualification Test Via Advice section, Open root v groove butt joint 3G vertical up. Normally, when the travel speed is too fast, the molten pool cools too quickly, locking in impurities and causing the weld bead to be narrow with pointed ripples, as shown in figure 7-12, view D. On the other hand, if the travel speed is too slow, the metal deposit piles up excessively and the weld is high and wide, as shown in figure 7-12, view E. In most cases, the limiting factor is the highest speed that produces a satisfactory surface appearance of a normal weld, as shown in figure 7-12, view A. Similar to MAG welding torch position and angles can be applied (however rutile flux cored will require different techniques). When you are welding a joint that has the same thickness then your work angle will take place in the center of the joint. © Copyright Integrated Publishing, Inc. All Rights Reserved. (Think of this as the front view of the work plates.) Profiles and sections of welds with various faults are compared with good welds on this page. (In MIG welding, steeper angles are possible than in stick welding.) Speed - If you move too fast, the size of the weld will be small and achieve insufficient penetration. Stick and wire welding require different angles. Beginner welders tend to move the rod too quickly, especially those who are transitioning to arc welding from another welding process. The travel angle is that angle which is defined when the gun is in a perpendicular position within the joint plane. That's because the arc is more concentrated, and thus capable of burning through metal. Arc welding faults. 2. Sometimes even 90 degrees straight in. The normal travel angle for all sorts of conditions and positions are from 5 to 15 degrees. When you are push welding you are forehand welding. For stick welding, you have to drag the weld. For welding vertical up, use a push or forehand technique and tilt the top of the electrode 0 to 15 degrees away from the direction of travel. Reduce your travel speed so the weld metal completely fills the melted-out areas of the base metal. In fact, you can make things worse if you don't take the time to do your fit-up correctly. In most conditions, this will be between 5 and 15 degrees. The mass of your work pieces also has an effect, with tinier work pieces heating up much faster than large, heavy pieces.. Low-carbon steel can be very forgiving when overheated, but other metals may lose their tensile strength or other qualities if you don't monitor the heat going in and out of the plates or pipe. /* 120x600, created 3/17/09 */ Some stick machines also have a setting known as Dig. Travel Speed Faults. With stick welding, maintain a 20° to 30° lead angle in the dragging direction. Variations in the ESO or CTWD affect the amount of the current going into the joint, regardless of the wirespeed setting on the machine. TheFabricator.com,
