I. Traditional Measurement Tools
1. Dial Indicator/Micrometer Method: Attach the dial indicator to the Z-axis and push the saddle along the workbench surface. Calculate the flatness error by measuring the pointer offset. Accuracy can reach 0.01mm. A reference surface needs to be established using tools such as a straightedge and contour blocks, and the deviation needs to be determined through multi-point measurements.
2. Level and Square Method: Use a precision level or standard square to check the perpendicularity of the workbench surface to the reference surface. Record the data and calculate the error using the intercept method. The diagonal method (recommended by national standards) can comprehensively evaluate flatness, but data needs to be collected along multiple measurement lines.
II. 3D Scanning and Laser Technology
1. Industrial-Grade 3D Scanner: Non-contact scanning can acquire full-size 3D data. Combined with inspection software, a flatness report is generated with an accuracy of 0.01mm. Suitable for complex curved surfaces.
2. Laser Tracker: High-precision laser equipment (such as API Radial) is suitable for large workbenches. It calculates flatness error using spatial coordinates and is suitable for on-site installation and positioning testing.
III. Dedicated Testing for Flexible Platforms: Three-dimensional flexible welding platforms must meet the following parameters:
Flatness ≤ 0.10/1000mm, Verticality ≤ 0.10/200mm.
Inspection is performed using an electronic level intercept method, and the error value is calculated using software.
Precautions:
Ambient temperature and vibration can affect measurement results; operation must be performed under stable conditions.
For large workbenches, it is recommended to use a multi-point measurement method (e.g., 8-16 sampling points) to improve representativeness.