What guarantees the machining accuracy of machine tools?

2、 Practical application

3、 Conclusion

To sum up, it can be seen that in theory, if the external factors are not considered, the full closed-loop control may improve the positioning accuracy of the foundation than the semi-closed-loop control. However, if the machine tool heating, environmental pollution, temperature rise, vibration, installation and other factors can not be well solved, the phenomenon that the full closed-loop is inferior to the semi closed-loop will occur. It may be effective in a short time, but over time, the influence of dust and temperature changes on the grating ruler will seriously affect the feedback data of measurement, thus losing its effect. At the same time, there will be an alarm when there is a problem with the grating ruler, resulting in the machine tool can not work.

Influence of production environment: the environment of general machining factory is bad, dust and vibration are common phenomena, but grating ruler and linear inductosyn are precision components, and their working principle is to measure relative moving position by light reflection. Dust and vibration are the biggest factors affecting measurement accuracy. In addition, the oil mist and water mist are serious in the machining process, which has a great impact on the grating ruler and linear induction synchronizer. Therefore, to use the full closed-loop control system, in addition to the installation and sealing, we must improve the production environment. Otherwise, this phenomenon will appear. The accuracy of the new machine tool is good, but it has been used for less than a year. Not only does the precision decline, but also the machine tool often alarms.

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