Application of Automatic TIG Pipe Welding in Clean Pipe Welding

In aerospace, electronics, medical, dairy, pharmaceutical, health and other industries, there are a large number of clean pipelines need to be welded, because the medium through which is not allowed to slow and accumulate in the weld, so the welding put forward high requirements; In view of this situation, the closed automatic welding equipment is used to carry out the clean pipe welding experiment, and the experimental results are satisfactory, and it has been successfully used in the actual production process.

Welding Equipment

WINCOO ENGINEERING CO.,LTD closed pipe automatic welding system, the system is composed of a program control power supply and a closed pipe welding head.

1.1 Programmed power supply:

Program-controlled power supply mainly consists of three parts: inverter power supply, microcomputer control part and cooling part.

1.1.1 Inverter power supply

Using the world's most advanced inverter power supply, inverter frequency of 100KHZ, fast response, accurate and stable current output.

1.1.2 Microcomputer control part

In this part, parameters such as gas time, current method, current size and rotation speed are precisely controlled in the welding process. The control has the following characteristics:

A Control gas advance protection and lag protection time.

B The current output can be selected by DC pulse, and the peak/base current size and time can be adjusted under the pulse mode.

C Digital control current output can be accurate to 0.1A, to ensure the stability of welding parameters.

D Rotation speed can be controlled autonomously according to requirements.

E The system also has a midway pause function.

F Welding parameters can be modified in the interval according to welding process requirements, up to 10 intervals can be divided.

1.1.3 Cooling part

The cooling part is mainly composed of water tank, condenser, water pump, etc. 5L cooling water can ensure that the temperature of the welding head will not be too high during the welding process.

1.2 Closed pipe welding head

The welding head is mainly composed of a clamping part, a rotating part, a welding distance and a shell

1.2.1 Clamping part

The clamping part of the welding head is made of lightweight and elastic titanium alloy, and the wire cutting is used to ensure that the two sets of fixtures can be concentric.

1.2.2 Rotation part

A DC servo motor drives the gear to drive the whole gear ring to rotate, the servo motor can ensure the accuracy of the rotation speed, the operation process does not produce pause and jitter phenomenon, the DC motor tail has a yard counter to count the rotation stroke.

1.2.3 Torch part

The tungsten electrode is fixed on the rotating gear, which can ensure that the tungsten electrode and the gear rotation synchronization, rotation at the same time there is a certain number of air holes on the gear, so that the outflow of argon can protect the tungsten electrode and the weld from damage.

Welding Process

2. 1 Clean pipe materials

Welded pipe is 316L stainless steel pipe, thickness is 1.5mm, 1.2mm, diameter is 38 mm, I groove butt, clearance and wrong side are within 0.5 mm.

2. 2 Welding requirements

A Welding to single-sided welding double-sided molding

B front and back molding uniform, beautiful

C The inner surface is not lower than the base material, and the outer surface is about 0.5 mm higher than the base material

Sum Up

3. 1 Advantages:

1) Because the welding seam is in a full argon protection state during the entire welding process, the weld will not be oxidized, and the surface shows a golden uniform and delicate fish scale pattern. The protection effect is much better for the open welding head (argon only protects the welding head in the welding area), and the open protective color is usually purple;

2) The length of the nozzle required by the sealed welding head is usually 20mm-25mm, and the length of the open tube is required to be more than 50mm;

3) For manual welding, the operator's technique is very demanding, otherwise the forming is not beautiful, and the automatic welding rotation speed is stable, and the forming is uniform and beautiful.

3. 2 The sealed welding system is small in size, easy to move, and can be operated in the field such as high altitude, and is not affected by external wind.

3. 3 The welding system adopts no wire process, which can weld carbon steel and stainless steel thin wall pipes below 2mm (including 2mm) to weld perfect welds.

3. 4 Usually in the electronics industry, the internal and external surface color requirements of the weld are more stringent, so the front protection gas (gun head protection gas) uses liquid argon, the back protection gas uses liquid nitrogen protection, and the internal and external surface can be silver-white.

3. 5 The system can adjust the welding parameters, can be modified 10 times, in order to ensure the energy balance in the welding process, so in the welding of more than 1.8mm wall thickness of the pipe, the system has its outstanding advantages.

3.6 The welding system can store 70 parameter programs to meet the customer's requirements of multiple pipe diameters requiring multiple parameters.

3.7 The sealed welding system has been widely used in aerospace, electronics, medical, health, food and other industries, fully meet the quality requirements of customers' products, has been well received by customers.

Conclusion

The pipe welding power supply is configured with sealed welding pliers, and the clean pipe with a wall thickness of less than 2mm can meet the welding requirements by adopting the appropriate welding process to ensure uniform and beautiful forming inside and outside the weld. The weld color is silver, so as to meet the welding requirements of clean pipelines.

WINCOO ENGINEERING CO.,LTD provides professional all position TIG tube to tube closed welding machine. Please visit our website:www.sino-wincoo.com for more information.