Seam welding machine

automatic linear seam welding machine 768x576

Feature of Seam Welding Machine

  • 1 Welding torch pneumatic moving up and down, the work piece is fixed, seam is flat.
  • 2 Work pieces positioning and centering by pneumatic, and pressing by the pneumatic keys, welding position can not offset.
  • 3 Welding torch can be up and down, left and right, forward and backward and angle adjusted, in order to meet the welding requirements.
  • 4 The control of the whole machine is PLC, AC variable frequency speed regulation, ensures the equipment reliability.
  • 5 Added copper backing strap, ensures reverse side forming.
  • 6 Welding form can be preset, storing and transferring. Through the man-machine interface can easily change the parameter and state transition.

Seam Welding Machine Constitutes

It is composed of a body, work piece positioning mechanism, work piece pressing mechanism , welding torch longitudinal running mechanism, torch lifting and adjusting mechanism, cooling system, welding power source, pneumatic system and electric control system.

1 Body

Welded by square tube and sheet steel; below is work table, work piece positioning and clamping mechanism are on it.  Above is gantry beam, mounted with welding longitudinal running mechanism.

2 Work piece positioning and centering mechanism

Using pneumatic block for centering

3 Work piece clamping mechanism

Use mandrel and pneumatic pressure key plate to clamp and press work piece; pressure is uniform. The seam and the clamping area illumination but not damage the operator’s eyes, the clamp plate is smooth, can pre positioning clamping 3mm thick. Clamping does not require any skills, clamping to avoid any thickness material mismatch, the clamping force can be controlled and regulated; positioning side direct clamping, and the other side can realize pre clamping meet weld seam alignment. Use mechanical block to avoid end surface dislocation; mechanical block can move to save time for short tube sliding. Clamping key width is not more than 80mm.

4 Welding torch longitudinal running mechanism

It is composed of AC servo motor, reducer, linear rolling guide. The AC servo drives torch running, high control precision, wide speed range, speed and torque are stable. Welding torch is driven by gear rack transmission, linear guide, walking with high precision. In order to ensure the welding quality, improve production efficiency.

5 Welding torch clamping and pneumatic lifting mechanism

The torch is driven by a cylinder to move up and down, and switch from preparation and welding station. The torch can be up and down, left and right and angle adjusted. The welding torch adjusting uses dovetail form, using screw adjustment, accurate adjustment, high positioning accuracy, after adjustment can be fastened.

6 Electrical system

The host uses Japanese Mitsubishi PLC as control core, control the welding torch, clamp and welding program execution. The system is good stability, simple structure, and convenient maintenance.

Use touch screen as the input and output interface; weld length, welding mode, welding specification, arc lead time can be input through interface. For the failure in welding process, it can alarm, and gives instructions.

Welding length using rotary encoder loop detection; position detection using good brand switch detection

Automatic detect starting point. After welding, automatic go back to original point.

Integrated control panel box; control buttons, touch screen, welding voltmeter and ammeter, welding specification control on one panel, convenient in use and operation.

7 Pneumatic system

Triplet, cylinder, valve and other components; control torch lifting and work piece clamping.

8 Cooling system

Equipment has cooling device, is mainly used in copper back strap pad cooling.

Seam Welding Machine Main components brand 

Name Brand
PLC Mitsubishi
Servo Motor Panasonic
Electric componets China Delixi

Seam Welding Machine – The Ultimate Guide

Seam welding machines have been an on demand item in the welding industry. Many companies in various sectors utilize it for the improvement of their businesses.

Welding and metalworking aren’t the only industries where you can use them. So long as you need complex metal welding procedures, you can find it useful.

Today, we’ll talk you through everything about Seam Welding and Seam Welding Machines.

What is Seam Welding?

Seam welding, basically, is a welding process that utilizes motor wheels, as opposed to rods.

Seam Welding

Similar to a regular welding process, its goal is to fuse two (2) or more workpieces together.

What is the Process of Seam Welding?

Most usually, metal sheets and flat workpieces are fused in a seam welding procedure.

Seam Welding Process

The process starts off by preparing the parts or components to be welded.

  1. The workpiece is loaded between the two (2) wheel electrodes
  2. When an electrical current runs on the wheels, it applies high heat to the workpiece
  3. Fusion of the workpieces occur and happen when the heat is run through the material
  4. In the process, nuggets are left and thus, creating the fusion

What are Nuggets in Seam Welding?


Nuggets are the trails molten metal. It’s usually a trail signifying the fusion of two workpieces or materials.

What’s Seam Welding Used For?

You can use seam welding if you want to create liquid or gaseous joints; or if the sheets you’re working on would need to withstand high amounts of pressure or impact.

Seam Welding Used For

Seam welding is used because of its strength, resistance, and overall – durability.

Is Stitch Welding the Same as Seam Welding?

Since both terms come from the fabric or textile industry, many people get it wrong.

Stitch Welding

Stitch welding and seam welding are two (2) different processes. Although it may seem like they’re the same, they’re actually not.

Seam welding uses a continuous weld to form the joint at the seams. You would usually need a seam weld if you’re joining or fusing intersecting materials.

Stitch welding does not have a continuous weld. Instead, it consists of broken up spaces in gaps between the welds, thus, forming the look of it being “stitched.” Moreover, it’s known as a “type” of seam welding.

Both processes are used for joints, but they differ in terms of the welding procedure.

Different Types of Seam Welding  

There are different types of seam welding and they can be categorized into the following:

Types of Seam Welding

Standard Seam Welding

This is the type of seam welding that you can do if you want to produce leak-proof and continuous welds.

It also is the most regular type of seam welding procedure.

Continuous Motion Seam

Also known as mash seam, this is a type of seam weld done through rotating electrodes.

The difference it has with the standard seam is that you would need to determine the speed of the rotators first, creating the impulses that result to the overlapping weld.

Intermittent Seam Welding

From the term alone, you’d already know what this is. It’s also commonly known as a stitch weld and the inconsistent pulses that the wheels provide the joining or the fusing of the workpieces.

Doing this can give you stitch-like results of the weld.

Where Can Seam Welding be Applied To?

 You can use seam welding in a wide spectrum of applications.

Seam Welding Applied To

Mostly, you can use it in applications where the sheets will be used s where fluids and gas would be used or contained.

The following are the most common sectors where you can apply seam welding:

  • Brewery Barrels
  • Tubing and Piping
  • Steel Fuel Tanks (Petrol Tanks)
  • Radiators
  • Transformers
  • Aircraft Tanks
  • And Many More

What is a Seam Welding Machine and Its Usual Components?

They are the machines to help you with the seam welding process.

Seam Welding Machine Components

The most usual parts and components of these equipment are:

  • Wheel Electrode (Up and Down)
  • Throat
  • Friction Drive Wheel
  • Motor
  • Power Supply

Of course, other manufacturers might have other parts, which they’ve added. But, these are just some of the general primary components that seam welding machines have.

Are Seam Welding Machines Automatic?

Most seam welding machines made and manufactured today are automatic. However, there are also some that are semi-automatic, as well as some that’s manually operated.

Its control system will depend on the manufacturer, as well as the machine itself. You can find a wide range of machines from welding material manufacturers and welding companies.

What’s a Longitudinal Seam Welding Machine?

Longitudinal seam welding machines are the equipment used to create longitudinal welds. Basically, it’s a weld that runs from atop the workpiece, going downwards.

Longitudinal Seam Welding Machine

You would want to perform this if you’re to weld two metals together, end to end.

What’s a Circumferential Seam Welder?

Circumferential seam welding machines are machines that can help you weld two round objects.

Circumferential Seam Welder

Instead of being welded at ends, you can create the weld around their circumferences.

What’s a Corner Seam Welding Machine?

Corner Seam Welding Machine

It’s a seam welding machine that you can use to weld the edges of metal sheets to one another.

Where Can You Find the Best Seam Welding Company?

The wide majority of welding companies can help you with a seam welding process. However, finding the best one can be a bit of a challenge.

But, here with us at Waldun, we are more than welcoming you to be a part of our business. We can help you with a wide range of seam welding procedures; as well as seam welding machines and equipment.

Who Can Give You the Best Seam Welding Machines and Equipment?

You can get the best and the most functional seam welding equipment with us here at Waldun.

We’ve been the most trusted and the most sought after company when it comes to seam welding. You won’t ever regret choosing to work with us!

Whether you need a circumferential or a longitudinal, or any other type of seam welding equipment, you can bank on us!

WALDUN Seam Welding Machine – Increase ROI & Efficiency 

Seam welding machines specialize in automated girth welding of cylinders, tubes, shafts, and disks of high quality. The welding process can be used in a variety of ways, such as PAW\TIG\MIG\MAG.

Suitable for welding of carbon steel, stainless steel, aluminum and aluminum alloy, titanium alloy, and other materials. It is widely used in automobiles, motorcycles, home appliances, pressure vessels, hardware products, and industrial processing industries.

Seam Welding Machines

Seam Welding Machine Features

The main welding machine is a horizontal machine structure. The machine base rail, spindle case, and tailstock are annealed and stress relieved after welding. It is guaranteed that the structural parts will not be deformed in the long term.

The head rotating action is driven by DC or AC deceleration motor. Precision gears or worm gears, stable rotation, stable and reliable welding.

The pneumatic tailstock is adjustable along the direction of the bed rail, adapted to different lengths of workpiece welding requirements.

The head of the welding machine can be adjusted according to the requirements, to adapt to the automatic welding of different shapes of workpieces, to ensure that the torch is in the best welding position.

(a) Single-sided welding and double-sided forming.

All gas pipes and cables rest in the drag chain—clean and attractive while avoiding cable breakage.

Adopting servo (stepping) motor, welding speed is precise and stable, with full adjustment range.

Automatic lifting of the gun.

Up and down, left and right crossed fine adjustment of the welding torch, precise alignment of the distance between the torch and the workpiece.

The gun can be rotated around a fixed rod for easy replacement and adjustment of accessories.Automatic Seam Welder

Seam Welding Machine Applications

The machine can weld stainless steel, titanium alloy, aluminum alloy, carbon steel, low alloy, and other materials. Welding. The welding process and tooling used varies depending on the specific length and thickness of the workpiece.

Automatic Seam Welder Samples

Ordering a Seam Welding Machine from WALDUN

In some cases, we can modify seam welding machine when not in the original equipment design. If your equipment has lost some efficiency or does not hold the same tolerances as new, inspect the worn parts. There could be an easy and cost effective fix to the problem.