Manhart How to evaluate the accuracy of a hydraulic servo CNC bending machine?

When evaluating the accuracy of a hydraulic servo CNC bending machine, we can start from multiple aspects and conduct a comprehensive evaluation based on specific digital information and parameter indicators. The following is an evaluation method expressed in a clear format:
I. Basic accuracy parameter evaluation
1. Straightness of bending workpieces: For example, for a 5.9-meter-long workpiece, the straightness error should be controlled within 15′ (minute angle), which reflects the accuracy of the bending machine in the length direction.
2. Repeated positioning accuracy of bending workpieces: This indicator reflects the consistency of positioning of the machine in multiple repeated operations. For example, it is required to be within the range of 3-5 wires (0.03-0.05mm), and the smaller the value, the higher the accuracy.
3. Forming accuracy of bending workpieces: Forming accuracy is directly related to the quality of the workpiece. For example, the 3-knife forming accuracy should be within 18 wires (0.18mm), which shows that the machine has high stability during the forming process.
2. Evaluation of the accuracy of key components
1. The accuracy of the finger of the electro-hydraulic servo CNC bending machine: The error from left to right should be controlled within 10 wires (0.1mm), which is an important indicator for measuring the operating accuracy of the machine.
2. Servo motor accuracy: The precise positioning of the servo motor directly affects the processing accuracy of the bending machine. For example, the servo motor using the bus servo method, such as Delta servo motor, can reach an accuracy of 0.001MM, ensuring the accuracy of the servo motor positioning.
3. Evaluation of operating performance and stability
1. Dynamic performance: Evaluate whether the machine moves softly and has no jitter throughout the operation, and whether it has the characteristics of silky smoothness, which reflects the stability of the machine during dynamic operation.
2. Functional performance: Check whether the machine has functions such as graphic programming, Chinese storage, and inching control, and evaluate whether these functions are operating normally to meet the needs of high-precision processing.
3. Stability: Consider the performance stability of the machine after long-term operation, and whether it can withstand long-term and high-intensity processing tasks.
4. Other details evaluation
1. Processing accuracy of worktable and slider plate: The processing accuracy of these parts directly affects the overall accuracy of the bending machine. Check whether mirror processing is used, and ensure that the processing is carried out at high speed and low speed to ensure the vertical accuracy of the processing and the brightness of the processing surface.
2. Assembly accuracy: Assembled by experienced installation masters, and ensure that each machine is checked at least 5 times to ensure the high standard of each electro-hydraulic machine.
3. CNC quick clamp and mold accuracy: Check the accuracy of CNC quick clamp and mold, ensure that the error of each quick clamp is within 0.02MM, and the docking accuracy of the mold is also within 0.02MM.
5. Environmental adaptability evaluation
Consider the adaptability of the bending machine in different environments, such as power supply stability, grounding treatment, vibration influence, etc. Ensure that the machine can adapt to various environments and maintain stable accuracy.
In summary, the accuracy evaluation of the oil-electric servo CNC bending machine needs to start from multiple aspects, combined with specific digital information and parameter indicators for comprehensive evaluation. Through a comprehensive and detailed evaluation, it can be ensured that the machine has high accuracy and stability to meet the needs of high-precision processing.