English
The medium frequency pipe bending machine uses medium frequency induction heating to bend the workpiece with local heating. Compared with general cold bending pipe machines, it not only does not require a whole set of specialized molds, but the machine size only accounts for 1/3 to 1/2 of the same specification cold bending pipe machine. It is one of the most economical and effective methods among various pipe bending processes.
During the medium frequency pipe bending process, an induction coil is placed around the part of the pipe that needs to be bent. A mechanical rotating arm clamps the pipe head, and high-density medium frequency current is introduced into the induction coil to heat the steel pipe. When the steel pipe temperature rises to a plastic state, mechanical thrust is used to push the rear end of the steel pipe for bending. The bent part of the steel pipe is quickly cooled with coolant. The process flow is simple: heating, pushing, bending, and cooling proceed simultaneously.
This process can avoid the uneven wall thickness of the pipe caused by the traditional bending process, where the convex edge is stretched and thinned, and the concave edge is compressed and thickened.
This process can produce 180-degree bends with a relatively small radius (RD) and thin wall thickness (t/D 0.015), and the wall thickness is uniform, which other bending processes cannot achieve.
If the process parameters are designed reasonably, this process can ensure that the wall thickness of each part of the pipe remains unchanged during the bending process, meaning the wall thickness of the straight pipe blank before deformation always remains the same.
By adopting this process, it is possible to produce 45°, 90°, and 180° bends of the same diameter on the same horn mandrel, with large bending angles and high production efficiency.
The working environment is good, and the heating process is pollution-free.
