The bending radius of the catheter determines the resistance of the catheter during bending. Generally speaking, a large pipe diameter and a small bending radius are prone to internal wrinkles and slippage during bending, and the bending quality is difficult to guarantee. Therefore, the R value of the pipe bending die is generally 2-3 times the pipe diameter.
The main influence of the bending forming speed on the forming quality is: too fast speed will easily cause the flattening of the curved part of the catheter, and the roundness will not meet the requirements, causing the catheter to crack or break; too slow speed will easily cause the catheter to wrinkle and The compression block is slippery, and the pipe with a large diameter is easy to form a depression of the curved part of the catheter. For a large number of tests on these two CNC pipe benders, it is advisable to determine the bending speed of the pipe to be 20%-40% of the maximum bending speed of the machine.