Manhart How to measure the accuracy of oil electric servo CNC bending machines?

To measure the accuracy of the oil electric servo CNC bending machine, the following steps and methods can be followed, which combine the relevant numbers and information in the reference article:
1、 Preparation work
1. * * Equipment preparation * *: Ensure that the CNC bending machine is in normal working condition and prepare measuring tools such as precision measuring rulers, angle measuring instruments, displacement sensors, etc.
2. * * Safety measures * *: Before operation, ensure compliance with safety regulations, wear appropriate protective equipment, and close or lock machine parts that may affect measurement accuracy.
2、 Precision measurement steps
1. * * Straightness measurement * *:
-Select a representative length of the workpiece (for example, a workpiece with a length of 5.9 meters) and mark it.
-Use a precision measuring ruler or laser rangefinder to measure the straight-line distance between the marked points on the workpiece and compare it with the standard value to evaluate straightness error.
2. * * Bending angle measurement * *:
-Set the bending angle according to the processing requirements and use an angle measuring instrument to measure the actual bending angle.
-Compare the actual bending angle with the set value to evaluate the accuracy of the bending angle.
3. * * Repeated positioning accuracy measurement * *:
-Perform multiple bending operations at the same position and measure the position after each bending.
-Calculate the deviation value of the position change and evaluate whether the repeated positioning accuracy of the bending machine meets the standard (for example, 3-5 threads, i.e. 0.03-0.05mm).
4. * * Forming accuracy measurement * *:
-Select a representative bent workpiece and measure its size and shape after forming.
-Compare the measurement results with the standard values to evaluate whether the forming accuracy meets the requirements (for example, the 3-blade forming accuracy is within 18 threads, or 0.18mm).
5. * * Dynamic performance observation * *:
-Observe the dynamic performance of the machine during operation, such as whether the action is soft and whether there is shaking.
-Evaluate the impact of these performance factors on machining accuracy.
6. * * Functional Performance Test * *:
-Test the various functions of the CNC bending machine, such as graphic programming, Chinese storage, and point control.
-Ensure that these functions operate properly and meet accuracy requirements.
3、 Precautions
1. * * Measurement environment * *: Ensure stable and interference free measurement environment to improve measurement accuracy.
2. * * Measurement equipment * *: Use high-precision measurement tools and equipment, and regularly calibrate and maintain them.
3. * * Testing Method * *: Conduct testing according to the manufacturer’s provided testing methods and standards, and record the test results for analysis.
4. * * Data Processing * *: Conduct statistical analysis on test data and use appropriate evaluation metrics (such as root mean square error RMSE) to evaluate accuracy.
Through the above steps and methods, the accuracy of the oil electric servo CNC bending machine can be comprehensively measured and evaluated, ensuring that it meets processing requirements and improves production efficiency.