Milling machines are machine tools that can perform milling, drilling, and boring operations on workpieces. CNC milling machines will gradually replace manual operation. To enhance your understanding of CNC milling machines, this article will introduce the relationships between the various components of a CNC milling machine and its main functions. If you are interested in CNC milling machines, please continue reading.
I. What are the relationships between the various parts of a CNC milling machine?
CNC milling machines are highly automated machine tools widely used in machining, mold making, aerospace, and other fields. They consist of multiple parts that work together to complete machining tasks. The following is a detailed introduction to the various parts of a CNC milling machine:
1. Bed: The bed is the foundation of a CNC milling machine, used to support and fix other components. The bed is typically made of high-strength cast iron or steel, providing good rigidity and stability. The design and manufacturing quality of the bed directly affects the machine tool's accuracy and stability.
2. Column: The column is the component connecting the machine bed and the spindle box, and is usually made of high-strength steel. The design and manufacturing quality of the column has a significant impact on the rigidity and stability of the machine tool.
3. Spindle Box: The spindle box is one of the core components of a CNC milling machine, used to mount the spindle and drive system. The design and manufacturing quality of the spindle box directly affects the machining accuracy and efficiency of the machine tool.
4. Spindle: The spindle is the rotating component of a CNC milling machine, used to drive the tool rotation. The design and manufacturing quality of the spindle has a significant impact on the machining accuracy and efficiency of the machine tool.
5. Cutting tools: Cutting tools are the cutting tools of CNC milling machines, used to perform cutting operations on workpieces. The type, shape, and material of the cutting tools have a significant impact on machining quality and efficiency.
6. Worktable: The worktable is the load-bearing component of a CNC milling machine, used to place and hold the workpiece. The design and manufacturing quality of the worktable has a significant impact on the machining accuracy and efficiency of the machine tool.
7. Guide rails: Guide rails are sliding components of CNC milling machines, used to support and guide the movement of the worktable and spindle box. The design and manufacturing quality of the guide rails have a significant impact on the accuracy and stability of the machine tool.
8. Servo System: The servo system is the drive component of a CNC milling machine, used to control the movement of the worktable and spindle head. The performance of the servo system has a significant impact on the machining accuracy and efficiency of the machine tool.
9. Control System: The control system is the brain of the CNC milling machine, used to receive and process machining programs and control the coordinated operation of various components of the machine tool. The performance of the control system has a significant impact on the machining accuracy and efficiency of the machine tool.
10. Auxiliary equipment: Auxiliary equipment includes cooling systems, lubrication systems, chip removal systems, etc., which are used to ensure the normal operation of the machine tool and extend its service life.
Relationship between the parts:
1. The bed, column, and spindle box together constitute the main structure of the CNC milling machine, providing support and fixation for other components.
2. The spindle and the cutting tool work together to complete the cutting of the workpiece and are the core functional components of the CNC milling machine.
3. The worktable and guide rails work together to move the workpiece and the spindle box, ensuring the accuracy and stability of the machining process.
4. The servo system and the control system work together to achieve precise control of each component of the machine tool, ensuring the accuracy and efficiency of the machining process.
5. Auxiliary equipment provides necessary support for the normal operation of the machine tool, ensuring its stability and service life.
In summary, the various components of a CNC milling machine cooperate to complete the machining task. The design and manufacturing quality of each component has a significant impact on the machine tool's performance; therefore, the performance and quality of each component should be fully considered when selecting and using a CNC milling machine.
II. Main Functions of CNC Milling Machines
(1) Point-to-point control function: The point-to-point control of CNC milling machines is mainly used for hole processing of workpieces, such as center drilling positioning, drilling, reaming, countersinking, boring and other hole processing operations.
(2) Continuous control function: Through the linear interpolation, circular interpolation or complex curve interpolation motion of the CNC milling machine, the plane and curved surface of the workpiece are milled.
(3) Tool radius compensation function: If programming is done directly according to the workpiece contour, the actual contour will be larger than the tool radius value when machining the inner contour of the workpiece; and smaller than the tool radius value when machining the outer contour of the workpiece. Using the tool radius compensation method, the CNC system automatically calculates the tool center trajectory, causing the tool center to deviate from the workpiece contour by one tool radius value, thereby machining a contour that meets the drawing requirements. By using the tool radius compensation function and changing the tool radius compensation amount, tool wear and machining errors can also be compensated, enabling roughing and finishing of the workpiece.
(4) Tool length compensation function: By changing the compensation amount of the tool length, the length deviation value after tool change can be compensated, and the plane position of cutting can be changed to control the axial positioning accuracy of the tool.
(5) Fixed cycle machining function: Applying fixed cycle machining instructions can simplify the machining program and reduce the amount of programming work.
(6) Subroutine Function: If the workpieces are to be machined in the same or similar shape, they can be written as subroutines and called by the main program, thus simplifying the program structure. The function of calling subroutines modularizes the machining program, dividing it into several modules according to the machining process, each written as a subroutine and called by the main program to complete the machining of the workpiece. This modular program facilitates machining debugging and optimizes the machining process.
