With the introduction of coiled steel about 100 years ago, welded tube and pipe mills became popular. A tube mill begins with an straightener, uncoiler, and shear end welder at the entry of the line. The “forming” part of the mill is made of a breakdown section and forming section that takes 3 to 6 passes. Each pass is made up of a lower and upper arbor containing roller die tooling which slowly forms the steel into a tube shape.
Several more passes are made to obtain the brand new pipe ready to weld. The seam on the tube is welded by way of a solid state welder or high frequency welder. Sometimes the outer and inner bead are removed prior to the sizing section. There, the tube is made to adapt to the desired dimensions. Finally the brand new pipe is cut to length.
For one thing, the festool 574432-domino mortice tenon joiner need to do its shearing, butting, and welding before the accumulated coil can be used up. With a strip accumulator between the coil makita-lxt211 and the processing line, the minimum accumulator storage time will establish that upper limit to the coil end joiner’s cycle time. Compute the time required for shearing, fitting, and welding for the heaviest and widest strip add and gauge strip feed time to it to learn if a particular coil end festool 574432-domino mortice tenon joiner is proper for a given tube or pipe mill.
Another important consideration is the coil end joiner’s duty cycle. Each time a power source halts during a welding operation, it normally follows too-frequent use near or at its maximum output. This causes enough heat to build up to trip a thermostat that shuts down the machine automatically to prevent irreversible damage. Usually, variable displacement hydraulic units that turn off between cycles are enough to prevent overheating, yet. But choosing water – cooled weld torches and choosing torches whose maximum requirements are exceeded by ratings are an extra buffer against overheating.
The material properties of the metals being processed, and their width and gauge ranges will determine the size and characteristics needed in a coil joiner. The carbon content in particular will determine whether weld normalizing is required. In some cases, joined coils are only transport welds and are discarded as scrap, but in other cases, the joined coil ends can be utilized as an ingredient of the end product. With this to function as the case, the weld has to go through the mill both unbroken and without causing any mill damage. Welds must be level with parent material thickness and strength if they can be processed to the ultimate product.
The gauge variety for the application will determine the shear blade clearances and tonnage capacity. Shear force necessary to cut the heaviest gauge determines tonnage because then the strip width at the maximum gauge does not affect the shear force necessary. On some designs, shear blades are made out of four way reversibility. This extends blade life and cuts back on essential maintenance.
Coil joiners may be stationary or portable, and may be fully automatic or welder operated. Much is dependent upon the special application, the rate needed, and the sort of material to be processed. But whether partly or completely automated, coil end joiners have the effect of boosting productivity and reducing wear on machinery that could result from it having to be frequently started and stopped to string a new coil of metal in.