Cold extrusion process of elbow is introduced

Elbow is a kind of pipe fitting used for pipe turning.  In all pipe fittings used by the pipeline system, the proportion is large, about 80%.  Usually, for different material or wall thickness of the elbow selection of another forming process.  Now manufacturers commonly used seamless elbow forming process has hot push, stamping, extrusion and so on.  Divided into hot push elbow machine and cold push elbow machine.  

Now we accept the cold extrusion elbow forming method.  The forming process of cold extrusion elbow is to use the elbow forming machine commonly used, put the tube blank into the outer mold, after the upper and lower mold, under the push rod, the tube blank along the inner mold and the outer mold reserved clearance activities and complete the forming process.  Through cold extrusion push elbow principle is very simple, cold extrusion elbow forming process is the use of common elbow forming machine, the tube blank into the outer mold, up and down the mold, under the push rod, the tube blank along the inner mold and the outer mold reserved clearance activities and complete the forming process.  It is made up of a horn core head or mandrel into the mold, put the pipe into the mold, the mold should have two semi-arcs, one up and one down, in the push process is a bending process along the mandrel.  There is a support at the back to put the feeding pipe section into the mandrel, and there is an archway rack at the back to firm the mandrel.  There is a hydraulic push rod device in the center, which drives the top column forward through hydraulic pressure.  Push the pipe along the mold semicircular groove along the mandrel to go forward, until the top column reaches the end of the position, the limit switch lock dies, and then push the pipe down, processing a good.  The corrected outer diameter meets the size requirements of the product.  The wall thickness is controlled by the wall thickness of the incoming material.  In the process of pushing, the wall thickness under normal environment should not produce changes, but if the reason is due to things, some places will produce signs of reducing the wall, so as to usually lift the material, the wall thickness should be added some margin, to guard against the overload due to local thickness reduction when pushing.  The outer diameter and wall thickness of the elbow have reached the requirements.  The following is to hold the finishing process, shot peening disposal penalty, the inner and outer surface of the elbow to remove the iron oxide, the two ends of the groove treatment for easy welding.  After the inspection, hit steel word, spray paint, packaging and other working procedures, can be put into storage, and then factory.