Today, we will tell you about the principle of the feeding device of the CNC pipe bending machine.

The elbow head can move horizontally along the guide rail. In this way, it is convenient to adjust the tube groove of the bending die to align with the center line of the machine tool after changing the bending die. This is simpler than adjusting the centerline of the machine tool by adjusting the guide rail and tailstock on the bed.

The trolley that completes the linear feeding motion (DBB) is pulled forward by the tube during the bending process of the tube. In this way, the "positive thrust" is removed, thereby eliminating the problem of synchronization between the trolley and the bending speed, and the negative feedback system of the DC motor set to increase the "positive thrust" is removed, and the electrical circuit is simplified.

The automatic pipe bender is beneficial to the bending of the pipe due to the positive thrust, especially when the pipe with a larger diameter is bent, the positive thrust is necessary. Therefore, the VB pipe bender adds a booster device.
When bending, because the trolley acts as a load, it is pulled forward by the tube. In order to improve the bending, avoid excessive thinning of the wall thickness of the bending part of the tube, reduce springback, and increase the booster device. When bending, the die not only compresses the tube, but is also pushed forward by the thrust to form a side thrust to help the bending.

The pipe bending arm and the bending spindle are connected into one body, the bending mold axis can be replaced, and the clamping mold can move up and down. This not only has a reasonable structure, but also increases the strength of the mechanical part, and the structure is simple, thus simplifying the electrical circuit.

When the CNC pipe bender is sent to the last bend, the trolley may collide with the die. At this time, the "interference zone" function can be used, that is, the die returns → the trolley continues to feed → the bending arm returns → the space corner (POB) → Clamp the clamp → loosen the chuck, and the trolley exits the interference zone → compression mold → bend the tube. In this way, not only the collision between the trolley and the die is avoided, the smooth completion of the last bend is ensured, and the clamping loss of the material head can be reduced, and the production cost can be reduced.