1. Pipe type regularization of hydraulic pipe cutting machine
When planning and arranging pipes, the arc should not be too large. Excessive arcs not only make the tooling bulky, but are also subject to the requirements of the size of the pipe cutting machine; arbitrary curves and compound bending are very unfair, which greatly hinders mechanized and automated manufacturing and makes it difficult for operators to break free from heavy manual labor. ; Greater than 180. The arc makes the pipe cutting machine unable to unload the mold.
2. Standardization of bending radius of hydraulic pipe cutting machine
The bending radius should only realize "one tube, one mold" and "multiple tubes, one mold". Regarding a pipe, no matter how many bends and bending angles there are, there can only be one bending radius, because the pipe cutter does not exchange modules during the bending experience. This is "one tube, one mold". And "multiple pipes and one mold" means that all pipes of non-stop diameter specifications should only be used to bend different shapes of pipes with a uniform set of modules even if a uniform door bend radius is adopted. This will help eliminate the number of modules.
3. Proper bending radius value of hydraulic pipe cutting machine
The size of the bending radius of the catheter determines the size of the resistance when the catheter is bent. Consistency Generally speaking, large pipe diameters and small bending radius are prone to internal wrinkles and slipping signs during bending. The bending quality is difficult to guarantee. Therefore, the R value of the pipe cutting die is generally 23 times the pipe diameter.
4. Moderate bending rate of hydraulic pipe cutting machine
The important influence of the bending forming rate on the forming quality is: too fast the rate, it is easy to cause the flattening of the bending part of the catheter, the roundness is not up to the requirement, and the catheter is cracked and broken; the speed is too slow, and it is easy to cause wrinkling and The compression block is slippery, and the pipe with a large diameter is prone to sink in the bending part of the catheter. For a large number of tests on these two hydraulic pipe cutting machines, it is appropriate to determine the bending rate of the catheter to be 20%-40% of the maximum mechanical bending rate.
5. The mandrel and its position of the hydraulic pipe cutting machine
The core rod plays an important role in supporting the inner wall of the bending radius of the catheter to prevent its deformation during the bending experience. Nowadays, the quality of domestic pipes is difficult to guarantee if mandrels are used for bending and forming on machine tools. There are many types of mandrels, such as cylindrical mandrels, universal single-, double-, triple-, and four-ball mandrels, and directional single and multi-ball mandrels. In addition, the position of the mandrel also has a positive effect on the bending of the pipe: theoretically, its tangent should be flush with the tangent of the pipe bending die, but a lot of tests have shown that it is better to be 1~2mm ahead of time. The quality of the bend is more ambitious. Of course, too much advance will cause the so-called "goose head" sign to appear on the outer wall of the curved section.
