As a high-precision machining equipment, CNC end face milling and boring machines play a crucial role in modern manufacturing. However, in the actual processing, due to the comprehensive influence of various factors, the equipment may produce certain errors. This article will explore the comprehensive error sources of CNC end face milling and boring machines, in order to provide reference for improving machining accuracy.
The errors of CNC end face milling and boring machines mainly come from the following aspects:
1、 Geometric error
Geometric error is one of the main sources of error in CNC end face milling and boring machines. This is mainly due to the combined effect of form and assembly errors of various components in the manufacturing and assembly process of machine tools, resulting in a decrease in the overall accuracy of the machine tool. For example, insufficient manufacturing accuracy of key components such as bed frames, columns, and workbenches, or deviations during assembly, can directly affect the machining accuracy of the machine tool.
2、 Thermal deformation error
Thermal deformation error is caused by the large amount of heat generated during the operation of the machine tool due to friction, cutting, and other reasons, resulting in thermal deformation of various components of the machine tool and causing errors. This type of error is particularly evident in CNC end face milling and boring machines, as the heat generated during the machining process is often large, and the thermal expansion coefficients of each component of the machine tool are different. Therefore, the influence of thermal deformation error cannot be ignored.
3、 Cutting force error
Cutting force error is an error caused by the deformation of the process system (including bed, column, worktable, spindle, tool, and workpiece) due to the cutting load applied to the tool and workpiece during the machining process. This error is particularly significant when using slender cutting tools or machining thin-walled parts, as the impact of cutting force on the process system is more prominent at this time.
4、 Servo control error
Servo control error is caused by the insensitivity of the control system, servo system response, or insufficient control accuracy. In CNC end face milling and boring machines, the control system is responsible for controlling the motion trajectory and machining parameters of each component, so its accuracy and stability have a significant impact on machining accuracy.
In summary, the comprehensive error sources of CNC end face milling and boring machines mainly include geometric errors, thermal deformation errors, cutting force errors, and servo control errors. In order to improve machining accuracy, it is necessary to start from these aspects and take corresponding measures and methods for error compensation and accuracy optimization.