Seamless elbow process

Seamless elbow processSeamless elbow: Elbow is a pipe fitting used at bends in pipes.  In all pipe fittings used in the pipeline system, the proportion is larger, about 80%.  Usually, different forming processes are selected for elbows of different materials or wall thickness.  Manufacturers commonly used seamless elbow forming process has hot push, stamping, extrusion and so on.

 Push hot forming

 Hot push elbow forming process is the use of common elbow push machine, core die and heating device, so that the billet set on the mold under the push of the push machine to move forward, in the movement of heating, expanding and bending forming process.  Hot push bend deformation characteristics are based on volume before and after plastic deformation rule of metal materials determine the pipe diameter, pipe diameter bend diameter, through the core module and control the deformation of the process, make the inner arc compressed metal flow, the compensation to other parts of the thinned by hole diameter, wall thickness uniform Angle is obtained.

 Hot push elbow forming process has the characteristics of beautiful appearance, uniform wall thickness and continuous operation, suitable for mass production, so it has become the main forming method of carbon steel, alloy steel elbow, and also used in the forming of some specifications of stainless steel elbow.

 The heating method of forming process has medium frequency or high frequency induction heating (heating ring can be multiple or single ring), flame heating and reflector heating, which heating method depends on the requirements of forming products and energy conditions.

stamping

Stamping elbow is the earliest forming technology used in mass production of seamless elbow. It has been replaced by hot push method or other forming technology in the production of common specifications of elbow. However, in some specifications of elbow, the production quantity is small, the wall thickness is too thick or too thin.

The product is still in use when it has special requirements.  Elbow stamping is formed by using the tube blank equal to the outer diameter of the elbow, which is directly pressed by the press in the mold.

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