High-precision cnc machine tool&21 geometric errors
The modern manufacturing industry has put forward higher and higher requirements for the machining accuracy of CNC machine tools. By measuring the geometric error of the machine tool and compensating it, it can improve the motion performance of the machine tool and improve the machining accuracy. Therefore, the measurement of the machine tool set error is of great significance for the machine tool accuracy verification and error compensation.
Laser Interferometer is a measuring tool with high measuring accuracy, the most perfect measuring method and the most mature technology in machine tool error measurement. At present, domestic and foreign machine tool manufacturers are widely using laser interferometer to measure 21 geometric errors of machine tools.
For CMMs and three-axis machining centers, the 21 errors are as follows (please refer to Figure 1):
-Position degree in X, Y and Z directions;
-Six straight lines (3X2) when moving in X, Y and Z directions;
-When moving in X, Y and Z directions, there are nine angular pendulums in rotation, pitch and direction;
-Three perpendicularities between X, Y and Z axes.
Figure 1: Schematic diagram of 21 geometric errors of the machine tool
Measurement requirements of diagonal of machine tool body
Machine tool manufacturers can rarely detect and measure all 21 geometric errors in actual production applications. For the verification of the spatial position accuracy of the machine tool, the national standard recommends the method of rapid measurement of the four body diagonals formed by the maximum stroke in the three directions of the machine tool operation. This method can accurately reflect the geometric accuracy of the machine tool and provide theoretical guidance for the compensation of the spatial position error.
Figure 2: Diagonal diagram of machine tool body
API XD Laser efficient solution
The
XD Laser Interferometer of API brand has the technical advantages of high integration and high accuracy. It is very simple and fast in measuring the accuracy of the diagonal position of the machine tool body. It does not need additional auxiliary tooling fixtures. It only needs to add a spherical reflector on the basis of standard accessories to easily realize the light measurement.
Figure 3: Schematic diagram of diagonal measurement of XD Laser interferometer
The XD Laser interferometer also does not need a tripod. A quick installation and adjustment fixture with a magnetic base is integrated under the main machine. Even the machine tool with a moving workbench can easily realize the accuracy measurement of the body diagonal position. The light adjustment is simple, easy to use, and does not need to add complicated tooling fixtures.
Figure 4: Measuring site of diagonal position accuracy of coordinate system
Figure 5: Measurement site of diagonal position accuracy of CNC machine body
conclusion
Based on the technical advantages of high precision and high integration, the XD Laser series interferometer can fully meet the needs of the majority of machine tool manufacturers and users for the rapid measurement and detection of the diagonal of the NC machine tool body, providing high-quality and reliable data support for production.
Figure 6: API XD Laser interferometer
About XD Laser interferometer
XD Laser series laser interferometer is a patented product of API company, which is used for rapid measurement and evaluation of machine tool error. XD Laser series laser interferometer includes 1D, 3D, 5D and 6D models, which can be selected, configured and upgraded according to the actual needs of users, so that users' investment always meets their needs.
Model 1D can measure the linear positioning error of CNC linear axis including the diagonal position accuracy of the machine body, including positioning accuracy, repeated positioning accuracy, and reverse clearance; In addition, it can also measure the movement speed and acceleration of CNC linear axis.
The 3D model includes all the functions of the 1D model, and can also measure the positioning straightness error of the NC linear axis (XX direction and YY direction); After purchasing the perpendicularity measurement accessory, you can also measure the perpendicularity between two CNC linear axes.
The 5D model contains all the functions of the 3D model, and can also measure the yaw and pitch angles of the CNC linear axis; After purchasing the corresponding accessories, it can also measure the indexing accuracy error of the CNC turntable.
The 6D model contains all the functions of the 5D model. It can simultaneously measure the linear positioning error (including positioning accuracy, repeated positioning accuracy, reverse clearance), straightness (XX direction and YY direction), perpendicularity, yaw angle and pitch angle of the CNC linear axis at one time, and automatically measure the rolling angle of the measured axis.
In addition, API also provides a choice of precision XD Laser interferometer for scientific research institutes, testing institutions, high-end manufacturing fields and other extremely high-precision measurement and detection needs, which is easy to operate and excellent performance!
