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Welding and Cutting

The welding and cutting category covers the various types of welding (arc, mig, tig) and the carious electrodes used for welding various metals. There are also questions regarding tips on various problems experienced by welders. Cutting is also a part of a welder's job and it too has many aspects.

1,783 Questions

What kind of welding is suitable for strong joints?

The kind of welding that is suitable for strong joints is Tee joints

What is weld spatter?

Weld spatter refers to the small bits of molten metal that can be expelled from the welding process. It can occur when excess welding wire or flux is present, leading to weld spatter landing on the workpiece or surrounding areas. Weld spatter can cause damage to the welding equipment, affect the quality of the weld, and create safety hazards.

Which color hoses to be used in oxy acetylene flame cutting?

Red for the combustible gas (Acetylene - MAPP - Propane), green for the Oxygen. All Oxy-fuel torches use these hose colors.

Why must the ends of a pipe be beveled before welding?

Beveling the ends of a pipe before welding is essential to ensure proper penetration of the weld and to create a strong joint. This preparation allows for better fusion of the base metals, reducing the risk of defects such as incomplete penetration or weak spots in the weld. Additionally, beveled edges facilitate the alignment of the pipes and improve access for the welding torch or electrode. Overall, beveling enhances the structural integrity and longevity of the welded joint.

Why must the ends of a pipe be believed before welding?

Before welding, the ends of a pipe must be beveled to ensure proper alignment and fit-up. Beveling creates a groove that allows for better penetration of the weld material, leading to a stronger joint. Additionally, it helps to remove any surface imperfections and contaminants that could weaken the weld. Properly prepared pipe ends ensure a more efficient welding process and enhanced overall integrity of the weld.

What is a leading electrode angle for in welding?

what characteristics does the weld bead have when weaving the electrode

What causes warpage or distortion?

Warpage or distortion in a material can be caused by uneven cooling, internal stresses, improper material handling, or excessive heat exposure. These factors can lead to a loss of dimensional stability and shape changes in the material.

What torch do you use in welding to produce a variety of flame sizes?

A welding torch as opposed to a cutting torch is more appropriate . Welding torches accommodate a variety of tip sizes designated by a number and have only one orifice (hole) for the flame. The smaller the number the smaller the tip orifice (hole) and a smaller flame. Larger numbers means larger hole sizes and larger flames. Sizes start at 0 and can be as large as 40 or more. The size of the tip is determined by the thickness of material to be welded/brazed. Thin materials would call for a small tip size, thick materials would need a larger tip size.

How long is a welding school?

Welding school can last up to a year. It will depend on how fast the student learns.

What are the welding parameters that must be consider to produce quality weld?

the metals to be welded should be placed correctly, the dust on the metals should be removed, the distance between the metals and electrode should be maintained, proper current must be produced on the basis of metal thickness.

Within how many feet must the welding cable be spliced from the electrode holder?

A minimum distance of 10 feet from the cable end to which the electrode holder is.

Types of tungsten electrodes?

Choosing one of the six commonly available tungsten electrodes is a crucial first step in successful gas tungsten arc welding (GTAW).

What is crown mean in welding?

In welding, the term "crown" refers to the highest point or the raised surface of a weld bead. It is an important aspect of weld appearance and quality, as a well-defined crown indicates proper fusion and shape. The crown can affect the strength and performance of the weld joint, so it is crucial for welders to achieve the correct crown profile during the welding process.

Why electrodes are coated?

  1. it insulates the electrode preventing formation of the arc except at the tips
  2. it melts and acts as a protective flux over the joint, preventing oxidation

Explain oxy- acetylene welding process with a neat sketchs?

WikiAnswers is not a picture site - there is no way to have "neat sketches" in our answers, sorry.

What are the limitation of MIG weld?

Most common and main limitation of MIG welding is that MIG welder could not weld thicker metal. If you want to know details then visit this site.

In what form is metal transferred across the arc in the axial spray metal transfer method of GMA welding?

Metal is transferred in liquid form across the arc in the axial spray metal transfer method of GMA welding.

Which method of welding requires the welder to control everything except the adding of filler metal?

The method of welding that requires the welder to control everything except the addition of filler metal is known as Gas Metal Arc Welding (GMAW), commonly referred to as MIG welding. In this process, the welder manages the welding parameters such as voltage, travel speed, and arc length while the filler metal is supplied continuously from a spool. The welder focuses on maintaining the correct technique and positioning as the filler metal is automatically fed into the weld pool. This allows for a more efficient and consistent welding process.

What is the term fish eye mean in welding steel?

In welding, the term "fish eye" refers to a specific type of weld defect characterized by small, round cavities or pores that resemble the shape of a fish eye. These defects typically occur due to contamination, such as moisture or oil, in the welding area or improper gas shielding. Fish eyes can compromise the integrity of the weld, leading to weaknesses and potential failure in the welded joint. Proper cleaning and control of the welding environment can help prevent this issue.