Get to Know Tack Welding: Helping Welder for Effective Work

Marcus Colson Last updated on October 19, 2023
Reading Time: 4 Minute

When we are working, using additional help can be an option, including when doing the welding process.

One method that I use quite often during the process is tack welding.

With tacking welding, additional support will make welding much smoother and safer.

If you are a beginner and want to get the most out of your work, tig tack welding is the right solution.

To understand what tack welding means and other important information, read the summary I have explicitly compiled for you in the article below!

What is Tack Welding?

Tack welding is a process that is done to help you when welding.

This is where the welder will place small bead-like dots along the joint of the object to be fused.

Simply put, in this process, we will precipitate a small amount of welding fluid which helps hold the metal piece in the desired position.

By providing this support, the welding can proceed correctly.

Although it sounds trivial and easy, this technique is one of the methods we need to master from the beginning of preparation to become a welder.

So, listen to this explanation, even if you already know about the basic or tack welding machine, because some information can be helpful to improve your skills as a professional welder.

Primarily until now, this technique is still an essential aspect because many welds require this tack welding aluminum.

Especially when you have to connect a problematic connection, this technique is necessary.

The number of points we have to make depends on the length, type, geometry of the joint, and thickness of the metal.

The function of this process is to keep our workpieces aligned during welding. Although the goal is “only” to align the material, it can ruin our work when the method is incorrect.

Read Also : Good vs Bad Welding: An Important Guide for Welders

How Tack Welding Works?

Welding is usually done for large or small-scale jobs, where the method is to deposit filler metal to unite metal pieces.

In this welding method, the electrode works by sending an electric current through our workpiece that has been heated internally.

This process also uses heat and pressure, just like any other technique.

The trick to successful welding is to place small tack welds on all metal components.

The small tack aims to prevent overheating and warping the workpieces before the welding process.

The size can be ½ to ¾ inch to keep the workpiece neat so that the final result is not disturbed by the spots.

Types of Tack Welding

To suit our purpose and needs in welding, several types are available, including:

1. Standard Tack Weld

This is a common and ideal type to use when considering final welding.

The size is just right to control the weight of the workpieces so they don’t break when we weld them.

Although the size is quite large, make sure that the weld is not too large so that the marks are not visible at the time of final welding and are more integrated into the joint.

2. Bridge Tack Weld

This type is used when the materials we will connect are suitable but leave a slight gap, so they must be welded.

The cause of this gap is usually due to supplier material distortion or errors when cutting it.

On each component, you can use small tacks alternately to allow the other parts to cool down before re-tacking.

3. Thermit Tack

We will mix several materials, such as aluminum powder, pure magnesium metal, and iron oxide powder.

The result of this mixture is usually high temperature, around 4000 degrees Fahrenheit (2204.444 degrees Celsius).

4. Ultrasonic Tack

We can make tack using a gas or electric welding machine, where the ultrasonic speed will create a short push or pull through the gap to be welded.

5. Hot Tacking

The purpose of this technique is to bridge the gap using a weld. In this technique, we must deposit filler metal in the holes of the material connection.

At first glance, the method is quite similar to bridge tacking, but in this technique, the welder uses a sledgehammer, after bridging each part with a weld, as a beater for each piece.

Forms of Tack Welding

There are currently at least four forms that you need to understand because they are beneficial for attaching components and joining parts together before they are fully welded.

Well, some of the forms that I found include the following:

  • Vertical. In the vertical form, we will put tack between two metals vertically. This is great if you want to connect two vertically aligned parts.
  • Square. This square pattern is solid and suitable for joining two parts at a precise angle.
  • Right Angle. You can use this shape to weld two metals with a perpendicular relationship.
  • Right Angle Corner. Creating a right-angle corner is highly recommended when you want to join pieces perpendicularly so that they are T-shaped. We will enter each piece at a 90-degree angle.

Read Also : AC vs DC Welding: Which is the Best Fit for Your Needs?

Advantages and Disadvantages of Tack Welding

This technique has advantages and disadvantages, so we must adjust to the work needs.

1. Advantages

Some of the advantages of this technique include the following:

  1. Easy testing. Before making a permanent connection, we can test the design first. If it is suitable, then the permanent connection can proceed. If not, we can evaluate first.
  2. Easy to do. Making some tack before welding takes a short time. This technique is also relatively easy once you know the appropriate form.
  3. Cost-effective. We don’t have to use expensive fillers during this process, just materials that are available and suitable for the material.
  4. As a stabilizer, it is easier to hold materials that are difficult to control using work tongs and hands.

2. Disadvantages

While the drawbacks to this technique are:

  1. Lack of strength. This type is weak enough to withstand various conditions, making it softer and less durable.
  2. Difficult to use in large areas. Because it requires balanced heat on both sides, it won’t be easy to weld in large parts or on the edges. Hence, this technique is recommended for small jobs only.
  3. Hard for the welder. This happens when the size is too large at the beginning of welding. As a result, we will have difficulty doing the finishing touches because we have to grind them down to reduce the size.

Well, although this tack welding technique makes the work process more accessible, still make sure to be careful when doing it.

Because if something goes wrong, it will make it difficult for us at the end of the welding.

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Marcus Colson
Marcus Colson

Welding is more than a hobby for me - it's a passion. The art of fusing metal together to create something new and functional never gets old. From intricate sculptures to sturdy structures, I love the endless possibilities that welding offers.

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