Select the manufacturing method of seamless elbow

Select the manufacturing method of seamless elbow fitting according to customer's requirement  

Stamping method: seamless elbow is made by expanding the tube end to the required size and form on the punch press with a tapered core.  

Forging method: seamless elbow in the production of type forging machine will be the end or part of the pipe to be stretched, so that the outer diameter is reduced, commonly used type forging machine has rotating type, connecting rod type, roller type.  

Rolling method: seamless elbow is usually made without mandrel, suitable for the inner edge of thick wall pipe.  The core is placed in the tube, and the roller is used to push and press the outer edge.  

Bulging method: seamless elbow in the production of a rubber is placed in the tube, with a punch above the contraction, so that the tube protruding shape;  Another method is hydraulic bulging, in which fluid is filled into the middle of the tube. The pressure of the fluid pushes the tube into the desired shape.  

Bending forming method: seamless elbow in the production of three ways are more commonly used, one way is called stretching method, another way is called stamping method, the third roller method, there are 3-4 rollers, two constant roller, a adjusting roller, adjust the constant roller distance, molding items pipe is curved.  

Seamless elbows are free from erosion, pitting, corrosion or wear.  Stainless steel elbow is one of the materials with high strength in the construction of metal raw materials.  Due to the excellent corrosion resistance of stainless steel elbow, it enables structural components to maintain engineering design integrity.  The raw material for rolling seamless elbow pipe fittings is round tube blank, and the round tube blank needs to be cut and processed by the cutting machine with a growth degree of about one meter, and sent to the furnace for heating by conveyor belt.  The billets are fed into a furnace to be heated to about 1200 degrees Celsius.  Furnace temperature control is the main problem.  After the round tube billet is out of the oven, the starting and ending pressure puncher is required to carry out the piercing.  The fuel is hydrogen or acetylene.  

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