Tube mill is used to manufacture tube and pipe by take a continuous length of pipe and continually rollforming it over to meet at a weld point. The welding operation at this stage fuses the seams and joins the joined sections of the pipe together forming a welded pipe. There are various methods for roll forming pipes, these can be manual or automated. Manual rolled pipes are quite slow in the process and require frequent rewelding when the cutting temperature is reduced. Automated systems provide high speed production of welded pipe.
The first step in manufacturing a tube mill is to take a length of pipe, calculate the required diameter and make a mark at the inner end of the pipe. The next step is to feed the pipe into a machine which makes parallel slits in the pipe. This machine can be a belt sander or a hydraulic press. After the welding has been completed, the weld puddle will be filled with sand. The height of the sand in the pipe will be set by the size of the slits in the tube. The length of the tube is then fed into the first slit and continues to pass through the other slits.
To finish the tube mill, the weld puddle should have been adequately cleaned and there should be no residual dust. The weld puddle is then passed through a shielding gas. The arc welding procedure is repeated until the required diameter of the stainless steel pipe is reached.
The next step in manufacturing a tube mill is to feed the steel roll forming material into a pressurised drum, this material is pumped into the rollers that spin at high speeds and create heat. The heated steel particles are then forced through the rollers and join together at the welding points, creating a smooth joint. This entire process is then monitored via an infrared camera, to ensure that all the steel is being fed and joined correctly.
Once all the pipes have been fed and prepared, it is time to feed the tubing into the tube mill. This machine has a series of spinning cylinders which open and close in a series. As the first pipe is fed into the spinning cylinder, it will form a loop of mechanical steel tubing. As the second pipe is fed into the first cylinder, the pattern will continue to repeat itself. A complete cycle of feeding and closing will form a large amount of tubing that will be sufficient to manufacture thousands of pounds of tubing.
Plastic tube mills can be purchased from any suitable company and both wet and dry crush types of milling machines are available. With both types of milling machines, there is a need for the correct sized pipes, the right type of filler and also a proper location. Pipe sizes can be measured using calipers or alternatively using an inexpensive tape measure. A positive pressure is required for both types of machines as the metal must be able to handle the forces when the pipes are closed. For more information on either type of milling machine, people wishing to purchase the equipment should speak to someone in the industry or visit one of the local dealers who deal with both types of machines.