中文简体Welding is a fast and effective way to join metal parts. Weld Metal Parts have mechanical and chemical properties that are a combination of the parent (base) metal and the filler material.
Tig welding has a couple of prongs that grip the steel kind of like pliers, and they hold a small glob of FILLER METAL in between. This makes a tiny, yet very strong weld.
T-Joints
A T-joint forms when the edge of one workpiece is welded to the center of the flat surface of another. This type of weld is very versatile and can be used in a variety of fabrication applications including tubing and equipment. T-joints have high mechanical strength, particularly when welded from both sides. However, this joint can be more susceptible to weld defects like lack of fusion and slag inclusion than other weld types.
The type of welding procedure you use will affect how well a T-joint performs. You may also want to consider the material thickness and application needs of your project when choosing between a T-joint and other weld types. For example, you would likely choose an edge joint for projects that won’t be subject to impact or stress. The edge joints can be welded on all four sides to enhance the joint’s rigidity, but this may require post-weld grinding for aesthetic purposes.
Corner Joints
A common welding technique, corner joint welds create a sturdy, reliable connection that is less likely to warp or break over time. They are quick and easy to do, even for beginners, and they can be easily automated on an industrial scale using machines that hold the workpieces in place at the correct angles.
The most common type of corner joint is an open one, where the edges of the two pieces meet but there’s an opening for some of the thickness of both metals to be visible. This type of corner weld distributes the stress more evenly and helps prevent lamellar tearing.
It’s important to properly fit the materials before welding. There is a possibility of distortion post-weld depending on how the joint was prepared, but you can avoid this by creating a jig that holds the material in place.
Edge Joints
As the name suggests, edge joints are used when joining pieces with flanged edges. They’re not very strong and are best for use on lighter parts that won’t be subject to a lot of stress.
Whether or not you should use an edge joint depends on your welding project, the strength needed for the job and the type of metal being welded. There are also other types of weld joints that can withstand more stress than edge joints can.
When choosing a welding joint for your application, consider factors like the depth of bevel, groove angle, and root opening. A bevel is the distance from a prepared face of a work piece to a line perpendicular to the welding direction. The groove angle is the included angle between two grooved surfaces, and the root opening is the space between the work pieces. Each of these dimensions is important for determining how much pressure and heat the weld can handle.
Plug Weld
In a plug weld one surface is joined to another through an elongated hole that can be open or partially or completely filled with weld material. This type of weld is primarily used in joining thin metal parts to a thicker base piece. The welds are strong and can withstand heavy loads.
These welds are useful when a spot weld is not possible or not practical. The process is essentially the same as for spot welding but the arc may be much hotter, resulting in a weld that is stronger than a spot weld.
When using a plug weld you will need to mark where the holes should be made in the base metal. This can be done in a variety of ways but drilling is most common. There will often be a number in parentheses on the weld symbol that indicates the depth of the hole to be made and/or the pitch (spacing) of the welds.
