The busbar milling machine is a device controlled by a CNC system. Its basic motion is a reciprocating linear motion, primarily used for punching, shearing, and bending of copper, aluminum, and other busbars. Its structure mainly consists of two parts: the mechanical structure and the electrical control system.
Mechanical Structure
The mechanical structure mainly consists of a stop mechanism, a worktable, a slider, and a synchronization system. The stop mechanism is motor-driven, with a chain actuator driving two lead screws to move synchronously. The CNC system controls the stop size. The worktable is operated by a button box, causing the motor to move the stop frame back and forth, with the CNC system controlling the distance traveled (readable to 0.01 mm). The slider uses hydraulic transmission, consisting of a slider, cylinders, and a mechanical stop fine-tuning structure. The left and right cylinders are fixed to the frame, and hydraulic pressure causes pistons to move the slider up and down. The mechanical stop is adjusted by the CNC system. The synchronization system is a mechanical synchronization mechanism composed of a torsion shaft, a swing arm, and joint bearings. It has a simple structure, stable and reliable performance, and high synchronization accuracy.
Electrical Control System
The electrical control system is the core of the equipment's automation and high-precision machining. The busbar machine's electrical control system consists of a high-voltage logic control system and a hydraulic control electrical system, each independently performing functions such as shearing, bending, punching, and pitting. The power supply is typically three-phase four-wire 380V±10%+PE, with control voltages of AC36V and DC24V. The control core uses a programmable logic controller (PLC). To improve accuracy, some models add a PID control algorithm in addition to the basic control program.
Precision Control and Workflow
To ensure high accuracy of the bending angle, the equipment uses a high-precision grating ruler displacement sensor to detect the die stroke, ensuring that the error between the actual bending angle and the set bending angle is within ±1°. Before normal operation, die calibration is performed. The purpose of die calibration is to calculate the actual distance from the front section of the moving die to the front section of the fixed die. Die calibration is a crucial step in the entire process; inaccurate calibration will affect the machining accuracy during normal operation. In terms of working method, the equipment is divided into limit bending and angle bending. Depending on the type of sheet material, bending is further divided into vertical bending and horizontal bending.
