Selection of Bending Oil Cylinder and Servo Motor

The power of the pipe bending machine is mainly driven by the oil cylinder and the servo motor.

Figure 1

Figure 2

In the figure 1, the clamping die and the guide die mainly play the role of clamping, and there is no requirement for accuracy, as long as the clamping force is enough, so basically the oil cylinder is used to complete the movement. Guided die assist is a follow-up action that does not require precision, so an oil cylinder can also be used. Rotation of the machine head According to the requirements of use, there are generally two configurations of oil cylinder and servo motor for the fixed machine head. The main angle of the servo motor control angle is accurate and suitable for those with high precision requirements. Cylinder control is fine for those who do not have high requirements for accuracy.

The corner and feeding of the feeding trolley in the left picture are servo motors because they need precise positioning.
In addition to the above basic configuration that requires a cylinder motor, when the pipe bender has two or more layers of molds, the head needs to be changed. The following is a comparison diagram.

Figure 3

First of all, the corner function of the two models can only be controlled by a servo motor because of the too much space. Then Figure 3 shows the 4A2S except for the two servo motors of the trolley and the corner servo motor. However, if the mold change moves up and down, if it is a two-layer, you can use an oil cylinder. In Figure 4, 5A3S has the same rotation angle as 4A2S and the servo motor for left and right head movement. Because it is a three-layer mold, three action points are required for the head to move up, down, and down. Although the oil cylinder can be used to control the oil cut off, the accuracy is not as accurate as that controlled by a servo motor, so the general three-layer mold machine still recommends 5A pipe bending machine.

Figure 4