1. Fault in Five Axis CNC Machining Principle

The fundamental errors in five axis CNC machining are caused by approximation of machining motion or approximation of tool generalization. Because there are errors in the processing principle, it is called processing principle errors. As long as the principle error is within the allowable range, this processing method is still feasible.

2. A few errors in the machine tool

Machine manufacturing errors, device errors, and wear during use directly affect the machining accuracy of workpieces. Among them, there are machine tool spindle reverse motion, machine tool guide rail linear motion, and machine tool transmission chain errors.

3. Manufacturing errors and wear of cutting tools

Manufacturing errors, device errors, wear and tear during the machining process of CNC machine tools can all affect the machining accuracy of workpieces. During the cutting process, there is a strong conflict between the cutting edge, cutting surface, workpiece, and chips, resulting in tool wear. When the tool wear reaches a certain value, the surface roughness of the workpiece increases, and the color and shape of the chips change, accompanied by vibration. Tool wear will directly affect cutting productivity, machining quality, and cost.

4. Fixture error

The fixture errors in five axis CNC machining include positioning errors, clamping errors, fixture device errors, and tool alignment errors. These errors are mainly related to the manufacturing and assembly accuracy of the fixtures.

The precision of five axis CNC machining is not perfect, as long as the error is controlled within a certain range, it is insignificant. Tool manufacturing errors and wear and tear.

5. Positioning error

Positioning errors mainly include reference misalignment errors and inaccurate positioning sub fabrication errors. When machining workpieces on machine tools, several elements on the workpiece must be selected as the positioning reference for machining. If using the selected positioning benchmark and planning benchmark (the benchmark is used to confirm the external dimensions and orientation on the part drawing). If misalignment occurs, it will result in a reference misalignment error. The workpiece positioning surface and fixture positioning components together form a positioning pair. The situation where the positioning direction is inaccurate and the workpiece displacement is large due to the cooperation gap between the positioning pairs is called positioning. Inaccurate errors in production.

6. Adjust errors

In every process of mechanical processing, the process system is always adjusted in one way or another. Because adjustments cannot be precise, adjustment errors have occurred. In the process system, the accuracy of the orientation between the workpiece and the tool on the machine tool is ensured by adjusting the machine tool, tool, fixture, or workpiece. When the original accuracy of machine tools, cutting tools, fixtures, and workpiece blanks meets the process requirements without considering dynamic factors, adjusting errors has a decisive effect on machining errors.

7. Measurement error

During the machining process or after CNC machining, the measurement accuracy of five axis CNC machining is directly affected by the measurement method, measuring tool accuracy, workpiece, and subjective and objective elements.