What are the skills characteristics of pipe bender?

1. Bending radius normalization

The bending radius should only be taken care of even if "one tube, one mold" and "multiple tubes, one mold" are finished ". To deal with a pipe, no matter how many bends there are and how the bending viewpoint is, there can only be one bending radius. Since the pipe bender does not exchange modules during the bending process, this is "one pipe and one mold". However, "multi-tube and one mold" means that pipes with continuous diameter specifications should only use common sets of modules to bend tubes of different shapes even if they receive a common bending radius, which is conducive to screening the number of modules.

2. Proper bending radius value

The bending radius of the catheter is determined by the resistance of the catheter during bending. Generally speaking, the pipe diameter is large and the bending radius is small, and signs of internal wrinkles and slippage appear briefly during bending. It is difficult to ensure the bending quality. Therefore, the R value of the pipe cutting die is generally 23 times of the pipe diameter.

3. Moderate bending forming rate

The important influence of the bending forming rate of the pipe bender on the forming quality is: the rate is too fast, which briefly forms the flatness of the bending part of the pipe, and the roundness does not meet the requirements, which forms the pulling crack and breaking of the pipe; The rate is too slow, which briefly forms the wrinkling of the pipe and the slipping of the compression block, and the pipe with large pipe diameter is easy to form the sinking of the bending part of the pipe. For many tests on these two pipe benders, the bending rate of the pipe is determined to be 20%-40% of the maximum bending rate of the machine.

4. Regularization of pipe type

Plan and arrange pipes to block large arcs, arbitrary curves, compound bends, and larger than 180. The arc. Too large circular arc not only makes the tooling bulky, but also is limited by the machine tool specification of the pipe cutting machine. Arbitrary curve and compound bending plan modeling are very unfair, which greatly prevents mechanization and automatic production, making it difficult for the operator to break free from bulky physical labor. More than 180. The arc of the pipe cutting machine cannot unload the mold.

5. Conformed mandrel and its orientation

The mandrel plays an important role in the bending process of supporting the inner wall of the bending radius of the catheter to prevent its deformation. At present, if the domestic pipe is bent and formed on the machine tool, its quality is difficult to ensure. Of course, the amount of advance is too large, will form the outer wall of the curved part of the so-called "goose head" sign. There are many ways of mandrel, such as column mandrel, universal single, double, 3. four ball head mandrel, directional single, multi ball head mandrel, etc. In addition, the orientation of the mandrel also has a certain influence on the bending and forming of the catheter: theoretically, its tangent should be flush with the tangent of the bending die, but many tests have proved that 1~2mm in advance is better, and the quality of the bending is better than the ambition.