What is the proper arc length when welding overhead?
As a good starting point, arc length should not exceed the diameter of the metal portion (core) of the electrode. For example, an 1/8-inch 6010 electrode is held about 1/8 inch off the base material.
Can you weld crane rail?
Crane and railway rails are made from steel grades that are not easily welded using conventional methods. For site welding of crane rails, the most common techniques are Enclosed Arc (Puddle Arc), Aluminothermic and Flash Butt Welding (not widely used for crane rails outside the USA).
What method in striking an arc is recommended for the beginners?
The scratching method is easier for beginners and when using an AC machine. The electrode is moved across the plate inclined at an angle, as you would strike a match. As the electrode scratches the plate an arc is struck.
Can you weld railroad track?
The railroad thermite welding is regarded as the most high-efficiency method to weld railroad tracks. Because of the high efficiency, reliable quality and high adaptability, the railroad thermite welding becomes the most popular way in railroad construction.
Which electrode is best for overhead position welding?
Choose the Correct Electrode The 7018 electrode was designed for this very purpose. Classed by the AWS (American Welding Society), this is the perfect choice because the 7018 has a lower content of iron powder.
What are the best tips for arc welding?
A simple but good arc welding tip is to add some filler metal to your weld puddle prior to taking it out and back over the weld. Always be observing your weld puddle because a good weld is always accomplished by focusing on what is occurring it it.
How to weld in the overhead position?
The keys to a good weld in the overhead position is to: 1 Keep your arc length short. 2 Lower amp settings. More
How to prevent welding problems on cranes?
Proper isolation and grounding of the crane’s electrical/electronic components should eliminate issues from the welding current itself, but better not to tempt fate. Connection of the welding work lead to building structure increases the chances of problems in situation 1) & 2).
What happens if a crane is hooked up to an arc pit?
As to the harm that might come if the crane was hooked up, it would be the result of poor work grounding. 2) Stray electric current/voltage damage to the electrical & electronic components of the crane & controls. In the case of 1) arc pits do cause localised hard spots in heat treatable materials.