what is travel angle in welding

Profiles and sections of welds with various faults are compared with good welds on this page. (AWS Welding … Peening is a procedure that involves lightly hammering a weld as it cools. The tip should form an angle of approximately 45 degrees with the plate surface. downhill mig can be effective for up to 1/4" thick if done right, but there are no guarantees. Speed - If you move too fast, the size of the weld will be small and achieve insufficient penetration. Travel Speed In most cases, weld penetration into a base material is increased when the travel speed of a weld is increased, and vice versa. The major cause of undercuts in welding is when the operator (welder) uses a high welding current or welds with fast travel speed. For stick welding, you have to drag the weld. Naturally, the techniques are somewhat different because of the equipment involved is different. //-->, Welder Qualification Test Via Advice section, Open root v groove butt joint 3G vertical up. The word 'travel' describes the movement of your torch. Notice that when the voltage is too high, the bead is wide and flat. When you push, the tilt is away from the puddle, which limits penetration and heat going into the base metal. The following chart shows how some CLAMS variables impact a weld bead: In the last two examples, "WFS" stands for wirefeed speed, which is how MIG and flux cored welding machines regulate current. While some stick electrodes are designed to penetrate through rust and millscale, those impurities can still cause problems. Strike the tip of the new electrode at the forward (cold) end of the crater and establish an arc. Travel angle is defined as the angle relative to the gun in a perpendicular position. 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. The electrode angle consists of two positions: work angle and travel angle. For this reason, students also learn the difference between Electrode StickOut (the wire length from the contact tip) and Contact-To-Work-Distance . Work angle. Ideally, you'll hold your torch perpendicular, or 90 degrees, to the joint. With a fillet (tee) weld, hold the rod or wire (regardless of weld process) at a 45° angle between the two pieces of metal. 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. It comes down to machine settings, electrode angle and travel speed. As you can see in the first diagram, the angle of the torch to the work piece (left) is 90 degrees, allowing maximum heat and current focused down into the open groove butt joint. The most common travel angle is called a drag angle in which the electrode points in a direction opposite that of the arc travel. In addition to CLAMS, there are a few other variables to think about when planning a weld operation: Joint Design and Fit-Up: How you prepare your work plates (or stationary structure) for welding may contribute more to the outcome of the operation than anything else. This setting allows you to increase the current above the set output amperage if your arc starts to fizzle out. 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. The principle of metal cored wire welding is given in the picture below. When wire welding (MIG or flux-core), the ridge should be approximately ⅜ inch behind the wire electrode, Hoes … Angle - There are two torch angles to remember when welding. Travel angles beyond 20 to 25 degrees can lead to more spatter, less penetration and general arc instability. The flame is pointed in the direction of welding and directed between the rod and the molten puddle. At slower travel speeds, the arc is directly above the center of the molten weld pool. When you are push welding you are forehand welding. When you are welding a joint that has the same thickness then your work angle will take place in the center of the joint. In other words, if you're using a 1/8 inch rod, hold it 1/8 inch from the joint surface. This gives the welder a better view of what's going on in the puddle. 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. This process aids in relieving built-up stresses and preventing surface cracking in the joint area; however, peening should be done with care because excess hammering can work harden and increase stresses in the weld. But if it crosses 20 degrees, it may result in weak penetration and instability of the arc. 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 this position, the torch is usually held at a 45-degree angle. The travel angle is also known as the drag or push angle. So voltage determines the overall profile, or geometry, of the weld. Push c. Drag d. This depends upon the welding position. The angle relative to the gun if it were held in a perpendicular position to the surface of the weld. ------------------------------------------, Copyright © 2012-2015 TheCityEdition.com, Improving Your Stick Welding Technique MillerWelds.com, Open root v groove butt joint 3G vertical up video, Using CLAMS paramenters in Stick Welding This is the relationship between the torch and line of travel. Length of Arc - How close to the work plates the welder holds the arc of a wire or welding electrode can affect the amount of current and heat going into the joint. Sometimes even 90 degrees straight in. Held close to the work plates, the current and heat in the weld remains high. Stick and wire welding require different angles. This procedure fills the crater and prevents porosity and slag inclusions. Arc welding faults. Shielded metal arc welding (SMAW) – commonly known as ‘stick welding’ – is one of the most widely used welding processes for joining metal. TheFabricator.com,