Analysis of gap bending and bottom bending of CNC press brake

Analysis of gap bending and bottom bending of CNC press brake

From the working state of the small press brake, its external load and working speed are not fixed, but change with the extension of time. In view of this, in the actual use of the hydraulic circuit of the bending machine, we must also consider the requirements of load and brake speed.

In order to meet this requirement, two types of small bending machine are usually used: variable pressure throttle speed regulation circuit and positive displacement speed regulation circuit. The former controls the flow into or out of the actuator by changing the flow area of the flow control component in the loop, and finally achieves the purpose of adjusting its speed. The throttling loss and calorific value are relatively small and the efficiency is high. The latter changes the movement speed of the brake assembly by changing the displacement of the variable pump or motor in the circuit. Because there is no overflow loss and throttling loss in the whole process, the working pressure changes with the load, so it has the advantages of high efficiency and low heat.

It is not difficult to understand the working principle of the bending machine, that is, the coil is electrified through the wire, and then the pressing plate is attracted, so as to realize the clamping of the thin plate between the pressing plate and the base

Tight, and finally meet the needs of various workpieces. The seemingly simple process needs the cooperation of all components to give full play to its functions. If any
If any part does not meet the requirements, the whole operation will be affected. Bending machine is a kind of equipment which is composed of many parts. First of all, the synchronous system is mentioned,

It consists of synchronous mechanism of torsion shaft, swing arm, spherical plain bearing and other parts, with reliable and stable performance and high synchronous precision. Secondly, the slider part except hydraulic transmission.The piston drives the slider up and down by hydraulic pressure.

The blocking mechanism is also an indispensable part of the bending machine. It is driven by the motor and drives the two screws to move synchronously through the interlocking operation. The size of the blocking mechanism is controlled by the numerical control system. The last part is the worktable, which is operated by the button box, so that the motor of the bending machine drives the baffle frame to move back and forth, and the moving distance is controlled by the numerical control system.

Even if the same type of bending machine is used, different bending methods can be used. According to the relative position of upper and lower die, gap bending and low pressure bending are the two most typical bending methods. One by one, it helps.

The so-called gap bending is the process that the upper die and the lower die are not compressed in the bending process, and the required bending angle is obtained by adjusting the depth of the upper die into the opening of the lower die. Generally, the deeper the upper die goes into the lower die, the smaller the bending angle of the bending machine, but the larger it is. The advantage of this bending method is that the forming process of various angles can be realized with fewer dies. What is a low bend? That is to say, when the metal plate is pressed between the upper die and the lower die, the required bending angle and elbow radius can be obtained. It is generally suitable for processing plates with thickness less than 2mm in medium and mass production.
It should be noted that the working pressure of bottom bending is much greater than that of gap bending.