1, The basic concept of the number of axes in CNC machine tools
The number of axes of a CNC machine tool, in simple terms, refers to the number of motion axes that the machine tool can control simultaneously. These axes typically include linear axes such as X, Y, and Z, as well as rotational axes such as A, B, and C. Each axis represents one degree of freedom of the machine tool, which means the machine tool can move or rotate in the direction of that axis.
X-axis: usually represents the horizontal movement of the machine tool, perpendicular to the Y-axis.
Y-axis: usually represents the movement of the machine tool in another horizontal direction, perpendicular to the X-axis.
Z-axis: usually represents the vertical movement of the machine tool, perpendicular to the X and Y axes.
A-axis, B-axis, C-axis: represent rotational motion around the X-axis, Y-axis, and Z-axis, respectively.
2, Common axis numbers of CNC machine tools
The number of axes of CNC machine tools varies depending on the type, purpose, and manufacturer of the machine tool. Generally speaking, the most common number of axes for CNC machine tools are 3-axis, 4-axis, and 5-axis, while in some special applications, there are also CNC machine tools with 6 axes or more.
3-axis CNC machine tool: This is the most common type of CNC machine tool, including three linear axes: X-axis, Y-axis, and Z-axis. This machine tool is suitable for simple machining processes such as milling, drilling, and boring. Due to having only three axes, its machining range is relatively limited, but the cost is low and easy to operate and maintain.
4-axis CNC machine tool: An additional rotating axis, usually A-axis or B-axis, is added on the basis of 3-axis. This type of machine tool can process some curved surfaces and complex parts, with a wider processing range and higher accuracy. 4-axis CNC machine tools have a wide range of applications in fields such as aerospace, automotive manufacturing, and mold manufacturing.
5-axis CNC machine tool: Add a tilt axis on top of the 4-axis, usually the C-axis or another rotation axis. This type of machine tool can process at more angles and is suitable for processing complex curved surfaces and spiral parts. 5-axis CNC machine tools have a wider processing range and higher flexibility, but the cost is also relatively high.
3, The influence of axis number on the performance of CNC machine tools
The increase in the number of axes not only improves the machining range and flexibility of CNC machine tools, but also has a profound impact on their performance.
Machining accuracy: With the increase of the number of axes, the machine tool can more accurately control the motion trajectory of the tool, thereby improving machining accuracy. Especially when processing complex surfaces and spiral parts, 5-axis CNC machine tools can demonstrate higher machining accuracy and surface quality.
Processing efficiency: The increase in the number of axes also improves the processing efficiency of CNC machine tools. Multi axis machine tools can control multiple motion axes simultaneously, achieving parallel processing of multiple processes and shortening the machining cycle. In addition, multi axis machine tools can reduce the number of workpiece repositioning and clamping times, further improving machining efficiency.
Material adaptability: The increase in the number of axes also improves the adaptability of CNC machine tools to materials. Multi axis machine tools can adopt more complex cutting strategies and tool paths to adapt to the cutting performance and machining requirements of different materials. This makes CNC machine tools more advantageous in processing difficult to machine materials and complex shaped parts.
4, Application fields of CNC machine tools with different axis numbers
Numerical control machine tools with different numbers of axes also have differences in their application fields.
3-axis CNC machine tools: widely used in aerospace, automotive manufacturing, mold manufacturing, electronic manufacturing and other fields. These fields typically require the processing of a large number of flat and simple curved parts, and 3-axis CNC machines can meet these needs.
4-axis CNC machine tool: suitable for processing parts with complex surfaces and three-dimensional shapes, such as automobile engine cylinder blocks, mold cavities, etc. In addition, 4-axis CNC machine tools are often used to process parts that require rotational machining, such as shaft parts and disc parts.
5-axis CNC machine tools: widely used in aerospace, medical equipment, precision instruments and other fields. These fields typically require the processing of parts with complex surfaces and spiral shapes, such as aircraft engine blades, medical device casings, etc. 5-axis CNC machine tools can efficiently process these parts, improving production efficiency and product quality.
