15230713671
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产品类型：Seamless elbow
产品型号：114
产品厚度：sch40
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Supply seamless elbow
Seamless elbow manufacturers direct sales, quality assurance, complete specifications, low price, long service life and other advantages. Seamless elbow pipe fittings are made of excellent quality materials. Customers order different specifications of seamless elbow pipe fittings.
Seamless elbow, also known as Seamless Elbow or Seamless pipe Elbow, is divided into hot rolled (extruded) seamless elbow and cold drawn (rolled) seamless elbow, depending on the manufacturing process. Cold-drawn (rolled) pipe is divided into circular pipe and special-shaped pipe two kinds.
The raw material for rolling seamless elbow pipe fittings is round tube blank. The round tube embryo is cut and processed by the cutting machine with a length of about one meter, and sent to the furnace for heating by conveyor belt. The billet is fed into a furnace to be heated at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in furnace is the key problem. After the round tube billet comes out of the oven, it must go through the pressure punch. The most common puncher is the cone roll puncher, which has high production efficiency, good product quality, large perforation and diameter expansion, and can wear a variety of pipe fittings. After perforation, the round tube is successively rolled by three rolls, cross - rolled, or extruded. After extrusion, take off the pipe and size. The sizing machine spins into the steel embryo through the conical drill bit at high speed to drill holes and form pipe fittings.
Forging method: the end of the pipe or part of the forging machine to stretch, so that the outer diameter is reduced, commonly used type forging machine has rotary, connecting rod type, roller type.
Rolling method: generally without mandrel, it is suitable for the inner circular edge of thick wall pipe. The core is placed in the tube, and the roller is used to push and press the outer edge.
Stamping: expansion of tube ends to desired size and shape with tapered cores in a punch press.
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