1, Machine body
The main body of the machine tool is the foundation and framework of the CNC milling machine, which bears all the forces and vibrations generated during the machining process. The main body of a machine tool usually consists of parts such as the bed, columns, crossbeams, and worktable. The bed is the supporting foundation of the entire machine tool and needs to ensure sufficient rigidity and stability; The column is used to support the crossbeam and worktable, ensuring their stability and accuracy during the machining process; The crossbeam is equipped with a spindle box for installing and driving milling cutters for cutting processing; The workbench is used for clamping workpieces and achieving relative motion between the workpiece and the milling cutter.
2, CNC system
The CNC system is the core component of a CNC milling machine, which controls all the movements and machining processes of the machine tool. Numerical control systems typically consist of components such as computers, controllers, drivers, and actuators. Computers are used to write and input machining programs, while controllers send control signals based on program instructions. Drivers receive control signals and drive execution mechanisms to perform actions. The executing mechanism includes servo motors, stepper motors, etc., which drive the various components of the machine tool to perform precise movements based on control signals.
3, Spindle system
The spindle system is one of the key components of a CNC milling machine, which is responsible for installing and driving the milling cutter for cutting processing. The spindle system usually consists of a spindle box, spindle, spindle bearings, spindle motor, and other parts. The spindle box is used to install the spindle and spindle motor. The spindle is supported on the spindle box by spindle bearings, and the spindle motor drives the spindle to rotate through a transmission device. The rotational accuracy and rigidity of the spindle have a direct impact on machining accuracy and surface quality.
4, Feed system
The feed system is another key component of a CNC milling machine, which is responsible for driving the worktable and milling cutter to perform relative motion and achieve cutting processing. The feed system usually consists of feed servo motors, ball screws, linear guides, and other components. The feed servo motor receives control signals from the CNC system and drives the ball screw to rotate. The ball screw drives the worktable to move in a straight line through a nut; Linear guide rails are used to ensure the stability and accuracy of the workbench during motion.
5, Automatic tool change system
In order to improve machining efficiency, modern CNC milling machines are usually equipped with automatic tool changing systems. The automatic tool changing system can automatically replace milling cutters during the machining process, reducing the time and labor intensity of manual tool changing. The automatic tool change system usually consists of a tool magazine, a tool change manipulator, a tool recognition device, and other parts. The tool library is used to store various specifications of milling cutters; The tool changing robot is responsible for removing the milling cutters that need to be used from the tool library and installing them on the spindle during the machining process; The tool recognition device is used to identify the specifications and numbers of the milling cutter, ensuring the accuracy and reliability of tool replacement.
6, Auxiliary devices
In addition to the main components mentioned above, CNC milling machines are also equipped with various auxiliary devices, such as cooling systems, lubrication systems, chip removal devices, etc. The cooling system is used to reduce the temperature during the cutting process, protecting the tool and workpiece from thermal damage; The lubrication system is used to lubricate and maintain various components of the machine tool, extending the service life of the machine tool; The chip removal device is used to timely remove chips and waste generated during the cutting process, and maintain the cleanliness and tidiness of the processing area.
