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Seam Welding Machine

Company Introduction

 

Wuxi Lemar Machinery Equipments Co.,Ltd is a high-tech enterprise specializing in automated welding equipment and H-shaped steel equipment.We have many years of production experience in the automatic welding industry and CNC plasma cutting industry.
Our products are widely used in pressure vessels, petrochemicals, power stations, heavy machinery, ships, steel structure construction and other industries.
In addition to production and sales, Wuxi Lemar has established a special one-stop service for H beam, Pipe and Flange automatic welding production lines and accessories and maintenance of CNC plasma cutting machines.

 

Why Choose Us

 

 

Our Certificate
We have passed the ISO CE SGS testing standard, besides, our machine have honor to won many patents, like H-beam manufacturing equipment patents, fuel tank in wall clean machine patents and etc.


Advanced Equipment
We also use advanced equipment. Which allow us to working by a high precision and to manufacture the customized machines according your requires.


Professional Team
Our professionally foreigner-sales team is on hand to assure the quality and effectiveness of your machine purchase. We will attend and manage your orders and enquiries very carefully to assist you to choosing the best machine to fit your needs and also to help you to save more during your business.


Rich Experience
Our company has many years of production work experience. The concept of customer-oriented and win-win cooperation makes the company more mature and stronger.

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What is Seam Welding Machine？

 

With Seam Welding Machine parts with the diameter of 100 – 3000 mm can easily be welded on different machine types. Machine with internal and external welding feature is manufactured with lengths ranging from 1 meter to 4 meters. For certain special conditions the machine length may increase as well. Right now the parts with maximum thickness of 0,60 mm can be welded. The thickness may go up to 20-25mm for the submerged welding applications. The longidutinal welding of the material and items such as the boilers, bath heaters, solar energy boilers, cooling tanks, natural gas chimneys, LPG tanks etc are mode on this machine. The welding systems such as submerged, gas metal and TIG work in sync with our machine.

 

Benefits of Seam Welding Machine

 

 

 

Easy to Operate
This process is quite easy and requires basic operation skills. Compared to spot and plasma arc welding processes, the welder can do it without any complications. Because of its simplicity, seam welding helps achieve high production rates. It’s reliable and offers very few challenges to the welder. Also, this process can be used to join similar and dissimilar metals.

 

Maximum Utilization of Current
Distortion of heat is minimal because heating is confined to a small area. Current is only turned on at regular intervals reducing wastage. Current passes intermittently through the electrodes to form a series of overlapping welds. The use of low current means electrodes can have a longer life compared to spot welding.

 

Suitable for Liquid and Gas Tight Containers
Seam Welding Machine works perfectly for liquid and gaseous joints. Steel drums, radiators, and tin cans are produced through this process. It creates airtight and watertight seals and is the best process for fabricating welds that need water or air leakage protection. Because of the creation of continuous welds, gases and liquids cannot leak.

 

Seam Welding Is Fast
If you want a fast weld process, seam welding is everything. With the whole process automated, seam welding seam faster than both spot and projection welding. Automatic transfer, loading, and unloading of components make the entire process easy and fast. Also, automation reduces labor input while multiplying output. Weld speeds are set for machines rather than human operation.

 

Minimal Pollution
Seam welding is one of the processes with no gas formation. Also, seam welding does not emit any fumes. Filler material, which causes pollution, is not utilized in seam welding.

 

Formation of Clear and Durable Welds
It gives a sturdy, durable weld with excellent reliability. Seam welds generally have better external appearance due to the absence of indentations. Joints are forged due to pressure and heat applied forming a durable weld. Tools produced through seam welding have excellent mechanical properties. Seam welds join a large surface area thus making strong welds. Besides, it is possible to produce parallel and seam welds simultaneously.

 

 

Automated Linear Seam Welding Machine

 

Type of Seam Welding Machine

Horizontal seam welding machine
The resulting weld is perpendicular to the electrode arm. The rotation axis of the roller electrode of this type of welding machine is parallel to the electrode arm, as shown in the figure "Transverse Seam Welding Machine", which is mainly used to weld long welds and circumferential annular welds of horizontal workpieces.

 

Longitudinal seam welding machine
The resulting weld is parallel to the electrode arm. The rotation axis of this type of welding machine roller electrode is perpendicular to the electrode arm, and is mainly used for welding short welds of horizontal workpieces and longitudinal straight seams of cylindrical containers.

 

Universal seam welder
That is, vertical and horizontal dual-purpose welding machine. The seam welding machine generally consists of the body, the pressurizing mechanism, the transmission mechanism, the welding resistance transformer, the power adjustment mechanism, and the welding circuit. Except for the electrode and the transmission mechanism, other parts are basically similar to the spot welding machine.

 

 

What Are the Working Methods of Seam Welding Machine

The seam welder mainly uses weldments to assemble to form lap joints or butt joints, and is placed between the electrodes of two rollers, and the electrodes of the rollers pressurize the weldments to rotate. Carry out continuous or indirect pulse loose power transmission. This results in a resistance welder with a continuous seam. That is to say, the seam welding machine is actually an evolutionary process of the spot welding machine. The application of the seam welding machine is mainly in the welding of the joints with strict honey properties.


Continuous seam welding
When the electrode of the roller rotates continuously, the weldment should keep moving at a constant speed, then the current of the welding machine will pass continuously and uninterruptedly, and a welding spot will be formed every half circle, and its welding speed can be maintained for one minute. 10-20 meters. However, since the quality of the surface of the object welded by this method is very rough, the practical application area is very small.

 

Intermittent seam welding
This welding method is to keep the weldment rotating at a constant speed, and the current of the welding machine will pass through intermittently. In this way, a solder joint will be formed every time it is turned on and off. Depending on the thickness of the plate being welded, the welding speed can reach 0, 5-4, 3 meters per minute. This welding method is widely used, and it is mainly suitable for closed welds of gas and oil in the production of ferrous metals.

 

Step-by-step welding
Move the solder joints intermittently to allow the welding current to pass through. Each time it passes and moves, a weld is formed, and forging pressure can also be applied. The formation of the joint of the object to be welded is very similar to that of a spot welder. However, the welding speed of this welding method is very low, and it can weld 0, 2-0, and 6 meters in one minute, and it is only used for the welding of aluminum alloy or magnesium alloy with high sealing performance.

GTAW Auto Straight Seam Welding Machine

 

Seam Welding Machine applications

 

It is used to weld various metals and its main applications include the production of seam welded pipes and pipes. In addition, the technology is also effective in manufacturing various types of sheet metal containers.
In addition to aiding in the production of seam-welded pipes, it is most commonly used in the manufacture of gas-tight or liquid metal sheets that make up heat exchangers.
Seam Welding Machine is a continuous spot weld that essentially produces a seamless weld and is effective on metals such as aluminum, titanium, tungsten, and stainless steel.
This process is very effective so while choosing a welding job, it is best for you to choose reliable spot welding electrodes and tips in Kolkata.

 

 
Seam Welding Machine Process

 

The formation of a butt weld joint is essentially the same as that of a spot weld, and therefore the factors affecting welding quality are similar. The main factors include welding current, electrode pressure, welding time, pause time, welding speed, and roller diameter.

 

Welding Current
The heat required to form a molten pool in a butt weld joint is generated by the resistance of the welding area to the flow of current, which is the same as in spot welding. Under given conditions, the welding current determines the fusion penetration and overlap of the molten pool.
When the welding current exceeds a certain value, increasing the current will only increase the fusion penetration and overlap of the molten pool without improving the joint strength, which is uneconomical.

 

Electrode Pressure
The effect of electrode pressure on the size of the molten pool in butt welding is the same as in spot welding. Excessive electrode pressure will cause excessive indentation and accelerate the deformation and wear of the roller. Insufficient pressure is prone to porosity and can cause the roller to burn out due to excessive contact resistance, shortening its service life.

 

Welding Time and Pause Time
In butt welding, the size of the molten pool is mainly controlled by the welding time, and the overlap is controlled by the cooling time. At lower welding speeds, a welding-to-pause time ratio of 1.25:1-2:1 can achieve satisfactory results. When the welding speed increases, the distance between welds increases, so the ratio must be increased to achieve the same overlap. Therefore, at higher welding speeds, the welding-to-pause time ratio is 3:1 or higher.

 

Welding Speed
Welding speed is related to the metal being welded, plate thickness, and the strength and quality requirements of the weld. Lower welding speeds are typically used when welding stainless steel, high-temperature alloys, and non-ferrous metals to avoid spatter and obtain high-density welds. Sometimes, stepwise butt welding is used to perform the entire molten pool formation process while the roller is stationary. The welding speed of this type of butt welding is much lower than that of intermittent butt welding.
Welding speed determines the contact area between the roller and the plate, as well as the contact time between the roller and the heating area, thereby affecting the heating and cooling of the joint. When the welding speed increases, the welding current must be increased to obtain sufficient heat.

 

Components of Seam Welding Machine

 

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.

 

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.

Work piece positioning and centering mechanism
Using pneumatic block for centering

 

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.

 

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.


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.

 

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.

 

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

 

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

 

 
Our Factory

 

Wuxi Lemar Machinery Equipments Co.,Ltd is a high-tech enterprise specializing in automated welding equipment and H-shaped steel equipment.
We have many years of production experience in the automatic welding industry and CNC plasma cutting industry.

 

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Our Certificate

 

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FAQ

 

Q: What is a Seam Welding Machine and its primary purpose?

A: A Seam Welding Machine is a specialized type of welding equipment designed to create continuous welded seams by joining overlapping sheets of metal or thermoplastic. Its primary purpose is to provide strong, leak-proof joints for various applications in industries such as automotive, aerospace, construction, and manufacturing.

Q: What materials can be seam welded?

A: Seam Welding Machines are typically used for welding metals such as carbon steel, stainless steel, aluminum, copper, brass, and other conductive materials. They can also be used for welding certain thermoplastics, although this requires different equipment and techniques.

Q: How does a Seam Welding Machine work?

A: A Seam Welding Machine operates by applying pressure and passing an electric current through the materials to be joined. The current heats the materials to a molten state, allowing them to flow together and form a weld upon cooling. The pressure applied by the machine ensures good contact between the materials and helps to distribute the current evenly.

Q: What factors affect the quality of a seam weld?

A: The quality of a seam weld depends on several factors, including the type and condition of the materials being welded, the amount of current and pressure used, the speed of the welding process, and the skill of the operator. Proper preparation of the materials, such as cleaning and preheating, also plays a crucial role in obtaining high-quality welds.

Q: What safety precautions should be taken when using a Seam Welding Machine?

A: Safety precautions when using a Seam Welding Machine include wearing appropriate protective clothing, such as gloves, safety glasses, and a face shield, to protect against flying sparks and debris. It is also important to ensure proper ventilation to avoid inhaling harmful fumes produced during the welding process. Additionally, always follow the manufacturer's instructions and adhere to local safety regulations.

Q: How often should a Seam Welding Machine be maintained?

A: Regular maintenance is essential to ensure the longevity and optimal performance of a Seam Welding Machine. The frequency of maintenance will depend on the machine's usage and the environment in which it operates. Generally, it is recommended to perform daily inspections and cleanings, weekly lubrications, and monthly checks of key components such as electrodes, cables, and transformers. More extensive overhauls may be necessary at longer intervals, depending on the machine's age and condition.

Q: What are the common types of Seam Welding Machines?

A: The most common types of Seam Welding Machines include rotary seam welding machines, linear seam welding machines, and orbital seam welding machines. Each type has its own unique features and is suited for different applications. For example, rotary seam welding machines are ideal for joining cylindrical or conical parts, while linear seam welding machines are better suited for flat or slightly curved surfaces.

Q: Can a Seam Welding Machine weld dissimilar metals?

A: Yes, a Seam Welding Machine can weld dissimilar metals, but it requires careful consideration of the properties and compatibility of the materials being joined. In some cases, additional filler materials or interlayers may be necessary to facilitate the welding process and ensure a strong, durable joint.

Q: How do I choose the right Seam Welding Machine for my needs?

A: Choosing the right Seam Welding Machine depends on several factors, including the type and thickness of the materials to be welded, the desired production rate, and the available budget. It is also important to consider the machine's power requirements, ease of operation, and maintenance requirements. Consulting with a knowledgeable sales representative or technical expert can help narrow down the options and find the best fit for your specific needs.

Q: Can a Seam Welding Machine weld dissimilar metals?

A: Yes, it can weld dissimilar metals, but special care must be taken to ensure compatibility and prevent issues like excessive porosity or cracking.

Q: What is the effect of temperature on the welding process?

A: Temperature plays a critical role in the welding process. Too high a temperature can lead to burn-through or excessive warping, while too low a temperature can result in poor penetration or weak welds.

Q: What is the role of current in the welding process?

A: Current is responsible for heating the materials to be welded to the point of fusion. The amount of current directly affects the depth and strength of the weld.

Q: What is the importance of pressure in the welding process?

A: Pressure ensures good contact between the materials being welded and helps distribute the current evenly, resulting in stronger and more consistent welds.

Q: What is the impact of the welding speed on the quality of the seam weld?

A: Welding speed determines the amount of time the materials spend at the fusion point. Faster speeds may result in weaker welds, while slower speeds may cause excessive heat input and potential damage to the materials.

Q: Can a Seam Welding Machine be used outdoors?

A: Most Seam Welding Machines are designed for indoor use due to their sensitivity to moisture and temperature fluctuations. However, some portable units can be used outdoors if properly protected from the elements.

Q: How can I improve the quality of my seam welds?

A: Improve quality by optimizing the current, pressure, and speed settings for your specific application, using high-quality consumables, and maintaining your machine regularly. Additionally, consider investing in training for your operators to ensure they understand best practices for seam welding.

Q: How does a Seam Welding Machine work?

A: It applies pressure and current simultaneously to the materials to be joined, causing the contact area to heat up and melt, forming a weld.

Q: What safety precautions should be taken when using a Seam Welding Machine?

A: Always wear protective clothing, including gloves, safety glasses, and a face shield. Ensure proper ventilation to avoid exposure to fumes.

Q: How often should a Seam Welding Machine be maintained?

A: Regular maintenance should be performed according to the manufacturer's recommendations, usually involving cleaning, lubricating, and inspecting components.

Q: What is the average lifespan of a Seam Welding Machine?

A: With proper maintenance, a Seam Welding Machine can last for several years, often exceeding 15 years.

We're well-known as one of the leading seam welding machine manufacturers in China for our quality products and good service. Please feel free to buy customized seam welding machine made in China here from our factory. For more information, contact us now.