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Process of machining pipe fitting with cold push elbow

Process of machining pipe fitting with cold push elbow

Elbow is a kind of pipe fitting used for pipe turning. In all the pipe fittings used in the pipeline system, the proportion is relatively large, about 80%. Usually, the different material or wall thickness of the elbow to choose a different forming process. Now the factory commonly used seamless elbow forming process is hot push, stamping, extrusion, etc. Divided into hot push elbow machine and cold push elbow machine.

Now we are important to use the cold extrusion elbow molding method. The forming process of cold extrusion elbow is to use the commonly used elbow forming machine, put the tube blank into the outer die, after the upper and lower die, under the push rod, the tube blank along the inner die and the outer die reserved clearance activity and complete the forming process. The principle of cold extrusion elbow is very simple. The forming process of cold extrusion elbow is through the elbow forming machine, the tube blank is put into the outer die, and the upper and lower die is closed. Under the push rod, the tube blank is moved along the gap reserved for the inner die and the outer die to complete the forming process. It is made of a horn shaped core head or mandrel into the mold, the pipe fitting into the mold, the mold should have two half arcs, one up and one down, in the pushing process is a process along the mandrel bending. There is support behind, the cutting pipe section is threaded into the mandrel, and there is a archway behind to secure the mandrel. The center has a hydraulic jacking device, through the hydraulic transmission of the top column forward push. Push the pipe along the mold semicircle groove along the mandrel forward, until the top column reaches the end position, limit switch lock died, and then push the pipe down, machining a good. The outside diameter after correction is up to the product size requirements. The wall thickness is controlled by the wall thickness of the incoming material. In the process of pushing, the wall thickness should not be changed in the normal environment, but if it is due to something, some places will produce wall signs, so that the same is usually lifted, the wall thickness should be added some allowance, to prevent the excess due to local thickness reduction when pushing. The outer diameter and wall thickness of the elbow have reached the requirements. The following finishing process is held, shot peening disposal penalty, the inner and outer surface of the elbow iron sheet is removed, the two ends of the groove treatment for welding. After the completion of the production of steel characters, spraying paint, packaging and other processes, it can be stored, and then factory. The elbow pipe fittings made of cold push elbow mechanism have the advantages of smooth surface, uniform wall thickness and standard size.