The production methods of threaded elbows mainly include hot pushing technology, stamping technology and squeezing technology, etc.
Hot pushing technology
Hot pushing forming is a process that uses a dedicated elbow pushing machine and heating device to move the billet placed on the mold forward under the push of the pushing machine, while being heated, expanded, and bent into shape. This method determines the diameter of the pipe blank based on the law that the volume of the metal material remains unchanged before and after plastic deformation, and controls the deformation process of the blank through a core mold, thereby obtaining an elbow with uniform wall thickness. The hot push elbow forming process has the characteristics of beautiful appearance, uniform wall thickness, and continuous operation, which is suitable for large-scale production. It is the main forming method for carbon steel and alloy steel elbows, and is also applied to the forming of certain specifications of stainless steel elbows.
Stamping technology
Stamping forming is the earliest forming process applied to mass production of seamless elbows, but it has been replaced by hot pressing or other forming processes in the production of commonly used specifications of elbows. Stamping forming elbows use molds that match the outer diameter of the elbow, and the material is pressed into the mold cavity to form. This method is suitable for producing elbows with small quantities, thick or thin walls, and is still in use when the product has special requirements.
Squeezing technology
Squeezing is a method of using an extruder and a mold to squeeze metal into the mold cavity by applying pressure to form an elbow of the desired shape.
