Features and forming technology of fully automatic pipe bending machine

Fully automatic pipe bending machines utilize computer-controlled processing throughout the entire process, modernizing and automating pipe bending processes and laying the foundation for flexible production. By replacing rollers, they can bend a variety of strip materials (such as rectangular and round pipes, channels, and angles).

Unlike conventional pipe bending machines, fully automatic pipe bending machines are increasingly popular due to their ease of operation and ease of use. They occupy a significant position among pipe bending machines. Below is an introduction to their key features.

1. Touchscreen and CNC Modes

The fully touchscreen mode is more advanced and offers significant convenience. Programming is simple and easy to use.

2. 16 Bending Angles per Shift

Each shift of the fully automatic pipe bender has 16 bending angles, allowing the memory to store 16 sets of data files. This machine has a large memory capacity, unlike other pipe benders.

3. Automatic Error Display

When an error message occurs, a prompt will appear on the screen, allowing the operator to identify and resolve the error promptly.

The fully automatic tube bending machine has the following five mechanical features:

1. The carriage, which performs linear feed (DBB) motion, is pulled forward by the tube during the bending process. This eliminates positive thrust, thus eliminating the synchronization issue between the carriage and the bending speed. It also eliminates the negative feedback system of the DC motor required to increase positive thrust, simplifying the electrical circuit.

2. The bending head can move laterally along the guide rails. This is necessary for the tube bending machine to align the tube groove with the machine centerline after changing the bending die. This method is simpler than adjusting the machine centerline by adjusting the guide rails and tailstock on the bed.

3. During bending, since the carriage acts as a load and is pulled forward by the tube, a booster device is added to improve the bend, prevent excessive thinning of the tube wall thickness in the bent section, and reduce springback. Fourth, when advancing the final bend, the trolley may collide with the die. In this case, the “interference zone” function can be used: die retracts → trolley continues advancing → bending arm returns → cornering (POB) → clamping → chuck releases, trolley exits the interference zone → die tightens → tube bends. This not only avoids trolley-die collisions, ensuring smooth completion of the final bend, but also reduces material head clamping losses and lowers production costs.

Fifth, the bending arm and bending spindle are integrated, the bending die shaft is replaceable, and the clamping die moves up and down. This design is not only rational and increases mechanical strength, but also simplifies the structure and simplifies the electrical wiring.
Regarding the forming technology of fully automatic tube bending machines, the recently emerging dieless forming technology has been successfully applied in the field of curved sheet metal processing. Fully automatic hydraulic CNC tube bending machines utilize dieless forming principles and hydraulic servo control technology. They employ industrial control computers for tube curvature design and bending control. The computer generates bending curve data, controlling the hydraulic servo system to perform the bending process. This method completely changes the traditional hand-made or contoured processing methods for vehicle frame curved rods, overcoming the drawbacks and limitations of mold processing. Furthermore, the bending curve is flexible and easy to modify. In particular, the bending radius can be adjusted based on the springback of the pipe, significantly improving production efficiency and processing accuracy.

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