What is the task you must do if you want to join two pieces of metal together? The right answer is you weld. Not only does it helps bond different metals together, but you can also shape the metals and form what you want out of them.
When it comes to forming structures, welding is of the greatest importance. Now, there are many different types of welds you can do and various joints for you to choose from.
All of that depends on what you are good at doing and what the task at hand requires you to do. Let’s head right to the main information on welding!
The 5 Different Types Of Welding Joints
There are many different types of welding joints you can make use of, but there are mainly five that we tend to use most frequently. And if you are a beginner, then there are the ones you should try to practice the most.
1. Butt Joint
The best starting point for most welders is the butt joint. For this, you would have to place two pieces of sheet metal side by side and weld them together.
There isn’t much to learn once you get the hang of how to use the welding machine. This kind of joint is something you would see in piping systems and even while forming some type of structure.
The very basic level of the butt joint is two flat plain metals being merged together. But that’s not how it always works. There are nine types of butt joints.
All these welding joints are used for different tasks and for different types of metals. With time you will need to learn how to work and form all the welding joints.
Some of the most common ones include Bevel-groove butt weld, Square-groove butt weld, V-groove butt weld, U-groove butt weld, J-groove butt weld, Flare-bevel-groove butt weld, Flare-V-groove butt welds etc.
Sometimes before you start to weld the metals together, we start off with edge preparation. This is done to make the weld stronger, which means that even under a lot of stress, the conjoined metals are not going to break apart.
Sometimes you might have to change the same of the edges so they can fit together perfectly.
2. Tee Welding Joint
The name of the joint comes from the ways the metals are more likely to be aligned to form a T. So, one of the pieces is horizontal, and the other is at a 90-degree angle on top.
When these metals are welded together, it is called a tee joint. Most often, they are addressed as a type of filler joint. While you are trying to form a tee joint, there are certain things you have to do to make sure the metals are merged properly.
If they aren’t, then chances are the welded joints will separate, and you will have to do it all over again. The best thing to do would be to work the edges to maximize penetration into the roof.
In order for an effective tee joint, you could use a never of different welding styles. Each of the styles is used for different purposes and will have different results.
The Plug weld, Fillet weld, Bevel-groove weld, Slot weld, Flare-bevel-groove weld, J-groove weld, Melt-through weld are some of the most common ones you are likely to use.
3. Corner Welding Joint
The type of joint we form here is very similar to the one we saw in tee joints. One of the metal is horizontal, while the other is vertical. The main difference here is that this kind of joint is for the corners where the ends of the metals meet.
In most cases, they tend to form an L. When weld metals are used to form a box, this is very important as the corners need to be welded together.
You would either join the edges of the shapes, which would be a V-groove, or you could place the end of one of the metals to the side of another to create a square butt joint.
And just like you can use many different welding styles used for creating corner joints include: Fillet weld, Spot weld, Square-groove weld or butt weld, V-groove weld, Bevel-groove weld, U-groove weld, J-groove weld, Flare-V-groove weld, Edge weld, Corner-flange weld etc.
4. Lap Welding Joint
Now on our list, we have the lap joint. This basically is welding metals by overlapping one on top of the other. And this type of welding is very common and is a type of modified butt joint.
When welding the metals together, you could weld it on one side or even both sides. The second method might be a little more time-consuming process, but in many cases, it can be useful.
But they are not very common on thick pieces of metal, and the weld isn’t as strong. Lap joint mainly include gas tungsten arc weld, resistance spot welding, as well as gas metal arc welding. Where the metals are overlapped, and the welding process is done on a single spot to join the metals together.
5. Edge Welding Joint
The last one we are going to be talking about is the edge joint. Here the surfaces are placed together. And the edges are bent at an angle so they can be welded together properly. The main reason why this joint was created was to reduce the stress on the joint.
So it is less likely of breaking. Welding styles used to create edge joints: U-groove, V-groove, J-groove, Edge-flange, Corner-flange are very common, and they are the ones that provide the most support.
Weld symbols are a type of description used to help others understand the type of weld joint. They are commonly used by professionals. One of the most common ones is fillet welds, which are used to make tee joint, lap joint, and corner joint.
There are the groove welds. This is mainly an edge to edge weld. There are other symbols for the square groove, V-groove, bevel groove, U-groove, and J-groove.
Read more: About weld symbols
9 Types of Weld
Here are the 9 types of weld you need to know about.
This is one of the most common types of welds you will find. Here the metal pieces come together at the right-angle. There are types of fillet welds as well.
Each of them is needed for different kinds of welding joints. The one used most often is the full fillet weld; here, the size of the thinner item is the same as the thickness of the weld itself.
As a welder, you will see yourself using groove weld very often. They come in very handy for a lot of jobs. They are very versatile; therefore, they can be used to form different forms.
There are 7 different types of groove joints you can use in your work. Each of the groove joints will determine how the joint will look and how the seam is going to turn out to be.
This kind of weld is typically circular in nature. And you would commonly see a lap joint being used to form the weld. Sometimes tee joints are also often used to form plug welds as well. At times a hole is formed at the center of the member, and that is where the weld starts at first.
In order to achieve surface weld, weld strings or weave beads are deposited on a surface. With the accumulation of the beads, the desired propensity is reached.
You will have a lot of control over the desired result while using this kind of weld. You’re most likely to use this when installing a new surface or to change out the old one.
If you are looking for a resistance weld, then the best option for you is the upset weld. It is most commonly used for fusions on abutting surfaces. Here you will need to apply a certain degree of pressure before you can add the heat.
The name of the weld clues you in on what the process here might be for the weld. A hole is made on one of the surfaces, and the other is inserted into the hole.
This is what forms the strong weld. The hole could have a closed-end or an open-end; it all depends on whether you need the other object to pass through.
In this type of weld, fusion is created over the entire surface using resistance. Here the heat is created from the two surfaces. Here you will need to apply pressure before any heating process can start.
This is the weld that is created due to an arc weld or even a resistance weld.
For this, too, the type of weld is typically not specified. But this is what you would find when forming an arc spot weld.