The structure and operation of the pipe bending machine

(1) wheel model (BENDING DIE)
Install: A, take the wheel die retaining nut in reverse clockwise direction (FIG-7 (1)). B, put the wheel die, and then lock the nut to lock the nut.
(2) clamping die (CLAMP DIE)
Installation: A, pull out clamping die fixing centering shaft (FIG-7 (2)). B. Put the clamping die in, and then insert the fixed mandrel.
Adjust: A, fix the clamping seat (FIG-7 (3) to relax, and then put the control panel in manual mode, press the pinch button (FIG-7 (3) to the end of the clamping line. ” At this time, there should be clearance between the clamping die of the wheel die, and the adjusting screw can be clamped by the mold base (FIG-7 (4) to adjust).
B, adjust the clamping screw adjustment screw (FIG-7 (4), so that the clamping die and wheel mold are fully sealed.
C, press the back button (FIG-4 (6)) to back the clamping die, then rotate the clamping adjusting screw (FIG-7 (4)) in clockwise direction about 1/2-1/4 circle.
D, then fix the clamping nut (FIG-7 (3)).
(3) guide mode (PRESSURE DIE)
Installation: A, remove the guide screw (FIG-7 (8)), and then insert the guided die.
B, lock the guide screw.
Adjustment: A, the guide die seat fixed nut (FIG-7 (5) relaxation, and then the control panel in manual mode, press the pinch button (3) to the guide die end end (at this time between the wheel and guide die between the gap, can be adjusted by the guide die screw (FIG-7 (6) to adjust.
B, adjust the guide adjusting screw (FIG-7 (6), make the guide die and wheel die fully closed.
C, press or withdraw button (FIG-4 (6), then adjust the guide screw (FIG-7 (6) in clockwise direction about 1/2-1/4 circle.
D, then fix the guide pin screw (FIG-7 (6)).
(4) mandrel
Installation: A, put the mandrel clockwise into the heart stick.
B, then fix the mandrel fixing screw (FIG-7 (8)).
(Note that the mandrel must match the bending direction of the elbow)
Tubular regularization
When designing and piping, avoid excessive arcs, arbitrary curves, composite bending and arcs greater than 180 degrees. Too large arc not only makes the tooling heavy, but also restricted by the size of the machine tool. The design of arbitrary curve and compound bend is very unreasonable, which greatly hinders the mechanization and automation of production and makes it difficult for the operator to get rid of the heavy manual labor; the circular arc is more than 180 degrees so that the bending machine can not unload the mold.
Standardization of bending radius
The bending radius should be realized as “one tube, one mold” and “multi tube one mode”. For a pipe, no matter how many bending or bending angles, the bending radius can only have one, because the bending machine does not change the module during the bending process, this is “one tube and one mold”. And “multi tube one mode”, that is, the same diameter pipe should be the same kind of bending radius, that is to use the same set of modules to bend the shape of different shapes, which is beneficial to reduce the number of modules.
Bending radius
The size of the bending radius determines the resistance of the pipe during bending. Generally speaking, the diameter of the pipe is small, and the inner wrinkle and skidding are easy to appear when bending. The bending quality is difficult to guarantee, so the R value of the bending die is 2-3 times as good as the pipe diameter.
Bending speed
The main influence of the bending forming speed on the forming quality is that the speed is too fast to cause the flat of the bend part of the catheter, and the roundness can not reach the requirement, which causes the pulling and breaking of the catheter; it is too slow to cause the wrinkling of the catheter and the slipping of the pressing block, and the pipe of the large pipe is easily formed into the sink of the pipe bending part. In view of the large number of tests on the two CNC bender, it is advisable to determine the bending speed of the pipe as 20%-40% of the maximum bending speed of the machine.
Mandrel and its position
In the course of bending, mandrel plays the role of supporting the inner wall of the bending radius of the pipe to prevent its deformation. If the domestic pipe is bent on the machine tool, the quality of the pipe can hardly be guaranteed without using the mandrel. There are many kinds of mandrel, such as column mandrel, universal single, double, three or four ball mandrel, directional single and multi ball mandrel. In addition, the position of the mandrel has a certain influence on the bending of the pipe. In theory, its tangent line should be flat with the tangent of the bend die. But after a large number of experiments, it has been proved that 1 to 2mm is better in advance, and the quality of the pipe is ideal at this time. Of course, too much advance can cause the appearance of the “goose head” on the outer wall of the curved part.