The CNC press brake bending machine mainly uses the equipped mold to bend the metal sheet in the cold state into workpieces with various geometric cross-section shapes. It is widely used in different fields. Then everyone knows that the working principle of the CNC press brake bending machine is How did it form? What are the structural components? The following is an introduction to “the operation mode and structure of the CNC press brake bending machine”.
Table of Contents
Introduction to the working principle and related structure of CNC press brake bending machine
The bending machine uses the equipped die (general or special chess set) to bend the cold metal sheet into workpieces with various geometric cross-section shapes.
The main components of the CNC press brake bending machine: the outline drawing of the wc67k series CNC press brake bending machine. It is composed of mechanism, slider stroke limit stop, hydraulic system, numerical control and electrical system.
Working performance: When bending, put the sheet on the front support frame, push it between the concave and convex dies, put the sheet on top of the rear stopper, step on the foot switch or press the button, the slider moves down, and the concave and convex die folds the sheet into the required angle.
The bending machine generally adopts the special numerical control system of the bending machine. At present, the coordinate axis has been developed from a single axis to 12 axes. The numerical control system can automatically realize the sliding depth control, the left and right tilt adjustment of the slider, the front and rear adjustment of the rear stopper, and the left and right adjustment. , Pressure tonnage adjustment and slider approaching working speed adjustment and so on.
The bending machine can easily realize the actions of the slider downward, jog, continuous, pressure holding, return and stop in the middle, and complete the bending of multiple elbows at the same angle or different angles at one time.
- Slider: The slider is composed of hydraulic cylinder, slider body, guide rail, etc. There are guide rails on both sides of the slider body, and two single-rod hydraulic cylinders are fixed on the left and right of the bed to push the slider to move up and down. A plunger cylinder is also installed to increase the bending force. The upper part is equipped with a sliding block displacement conversion device, so as to realize the monitoring of the sliding block displacement by the numerical control system.
- Rear stopper: It is installed behind the worktable to ensure the accurate positioning of the plate on the bending machine. The servo motor drives the ball screw through the toothed belt to drive the stopper to move back and forth and accurately position the stopper. It can be moved up and down through the lifting screw and roller to ensure that the mold needs to be bent at different angles.
- Slider synchronous anti-straining mechanism: the feedback mechanism is composed of a synchronizing shaft, a swing arm, an adjusting rod and a lever, which feeds back the asynchronous error of the movement of the pistons of the left and right hydraulic cylinders of the slider to the synchronizing valve, and controls the pistons of the two hydraulic cylinders to tend to the synchronous valve. Synchronize.
- The stroke limit stop of the stop adjustment mechanism can ensure the accurate positioning of the slider at the bottom dead center, and its adjustment is also realized by the servo motor driving the worm worm gear and the nut pair through the toothed belt.
Structural Transformation of CNC press brake bending machine
CNC press brake bending machine processing instructions are generally controlled by a computer. The heat source is usually caused by the CNC press brake bending machine itself, so the structure of the CNC press brake bending machine needs to be transformed. So how do we transform through structure?
First of all, we need to reduce the thermal deformation caused by the heating inside the cabinet. This heat is usually the main heat source, and we should try to find a way to separate the heat source from the host.
Second, we must control the temperature rise through good heat dissipation and cooling, thereby reducing the influence of heat sources. Generally, we will use forced cooling in the heat-generating part of the machine tool, or we can use the heating method in the low-temperature part of the machine tool to make the temperature of each point of the machine tool tend to be consistent, which can reduce the warpage caused by temperature difference.
Again, for the mechanism improvement of the CNC press brake bending machine, we usually use a double-column mechanism to replace the single-column mechanism. The main axis of the double-column mechanism after being heated has little deformation in other directions except for the translation in the vertical direction, while the axis in the vertical direction is small. Movement can be easily compensated with a coordinate correction.
Finally, for the main shaft of the CNC bending cabinet, the distance between the main shaft center and the main shaft is generally minimized, and the front and rear temperature rises of the headstock can be kept consistent.
The above introduction to “the operating principle and related structure of the CNC press brake bending machine” and “the structural transformation of the CNC press brake bending machine” hope to help you understand the “operation mode and structural composition of the CNC press brake bending machine”.