Detailed explanation of the forming process of stainless steel seamless elbows
The manufacturing process of stainless steel seamless elbows includes multiple technical paths, with the core process centered around material plasticity and forming accuracy.
Among them, hot pressing molding is the mainstream technology. First, insert the seamless pipe into the mold, apply axial thrust through a pushing machine, and use a heating device to achieve plastic deformation at a high temperature of 1050-1150 ℃. Utilize diameter expansion compensation to ensure that the wall thickness error is ≤ 5%.
Stamping process: divided into cold stamping and hot stamping. Cold stamping presses thin-walled elbows (wall thickness ≤ 10mm) at room temperature, while hot stamping reduces equipment tonnage requirements by heating, making it suitable for thick walled elbows (wall thickness>10mm).
Hot press bending forming process: using the principle of radial compensation, the heated tube blank is synchronously shrunk and stretched through the mold, suitable for the production of large diameter (DN ≥ 300mm) and thick walled (t ≥ 15mm) elbows. The direction of metal flow and the extension of the branch pipe are coordinated to achieve structural forming.
Cold push bending forming process: relying on hydraulic press or crank press to precision mold at room temperature, the minimum bending radius can reach 1 times the pipe diameter, and the outer wall thinning rate is ≤ 9%. It is commonly used for high-precision thin-walled elbow processing.
Hot bending process: Use a medium frequency heater to heat the steel pipe to 500-800 ℃, slowly bend it through a bending machine, and use cutting straight pipe sections and non-destructive testing to ensure the mechanical properties of the finished product.
The process selection of stainless steel seamless elbows should take into account the production scale, wall thickness specifications, and precision requirements. For example, for large quantities of standard elbows, hot pressing is preferred, while for special specifications and small batch orders, stamping or cold pressing is suitable.
Detailed explanation of the forming process of stainless steel seamless elbows
The manufacturing process of stainless steel seamless elbows includes multiple technical paths, with the core process centered around material plasticity and forming accuracy.
Among them, hot pressing molding is the mainstream technology. First, insert the seamless pipe into the mold, apply axial thrust through a pushing machine, and use a heating device to achieve plastic deformation at a high temperature of 1050-1150 ℃. Utilize diameter expansion compensation to ensure that the wall thickness error is ≤ 5%.
Stamping process: divided into cold stamping and hot stamping. Cold stamping presses thin-walled elbows (wall thickness ≤ 10mm) at room temperature, while hot stamping reduces equipment tonnage requirements by heating, making it suitable for thick walled elbows (wall thickness>10mm).
Hot press bending forming process: using the principle of radial compensation, the heated tube blank is synchronously shrunk and stretched through the mold, suitable for the production of large diameter (DN ≥ 300mm) and thick walled (t ≥ 15mm) elbows. The direction of metal flow and the extension of the branch pipe are coordinated to achieve structural forming.
Cold push bending forming process: relying on hydraulic press or crank press to precision mold at room temperature, the minimum bending radius can reach 1 times the pipe diameter, and the outer wall thinning rate is ≤ 9%. It is commonly used for high-precision thin-walled elbow processing.
Hot bending process: Use a medium frequency heater to heat the steel pipe to 500-800 ℃, slowly bend it through a bending machine, and use cutting straight pipe sections and non-destructive testing to ensure the mechanical properties of the finished product.
The process selection of stainless steel seamless elbows should take into account the production scale, wall thickness specifications, and precision requirements. For example, for large quantities of standard elbows, hot pressing is preferred, while for special specifications and small batch orders, stamping or cold pressing is suitable.