With the continuous development of modern industry, the application of CNC machine tools in manufacturing becomes more and more extensive. CNC machine tools mainly control the processing process via IT programs and can obtain high-efficiency processing operations. However, when the tool-tool is operated, due to the temperature effect, the structure of the machine deformation can be caused, which affects the treatment accuracy. Therefore, in order to solve this problem, the heat compensation technology for CNC machine tools was born.
The thermal compensation technology of the CNC machine refers to a technical means of using measuring equipment such as temperature sensors to monitor the temperature monitoring in real time of the tool-tool and use the control system The computer to make real compensation in time during the processing process. The thermal remuneration methods of the commonly used machine are mainly the following:
The thermal error compensation method based on the experience model: this method establishes the experience model according to the historical data of the processing of machine-tools, predicts the temperature modifications of the tool-tool in the environment Current and automatically adjust the processing parameters via the computer control system to achieve the objective of precise processing.
Thermal error compensation method based on the neural network: this method learns and leads to the input temperature and the output error of the tool-tool by establishing a neural network model, in order to obtain the error of heat during the treatment of the tool-tool.
The thermal error compensation method based on the analysis of the limited elements: this method models the structure of the machine tool via the analysis software of the limited elements. System to eliminate it to eliminate the impact of temperature changes on the accuracy of treatment.
The thermal error compensation method based on the thermal sensor: this method can monitor temperature changes in the tool machine by installing the temperature sensor on the machine surface or key parts, and the treatment parameters Processing parameters via system control system to achieve the objective of precise processing.
In practical applications, different methods of thermal compensation for CNC machine tools have their unique application scenarios and their advantages and disadvantages. For example, the thermal error compensation method based on the empirical model is simpler in the collection and processing of data, but it requires a large amount of historical data to model, and the heat error in the new environment cannot be taken into account. On the other hand, the thermal error compensation method based on the neural network can adapt to heat errors in various environments, but it takes a lot of time for model training. The thermal error compensation method based on the analysis of the finite elements can take into account the deformation of the machine-tool structure, but the complex modeling process and the management of the high performance computer. The thermal error compensation rule based on the thermal sensor must install the temperature sensor on the machine surface or key parts, which increases the costs of the equipment and the implementation difficulties.
In general, the thermal remuneration technology for CNC machine tools provides an important solution for the modern manufacturing industry. By selecting the appropriate thermal replenishment method and optimizing the real production environment, it can considerably improve the treatment accuracy and the overall efficiency of the tool-tool.
The thermal compensation technology of the CNC machine mainly includes the following methods:
The thermal error compensation method based on the empirical model: this method establishes a certain mathematical model by analyzing the historical data of the processing of tool-tools. During the processing process, real-time monitoring of temperature changes in the tooltip and forecasting the trend of temperature changes in the environment where the machine tool is provided according to the experience model, the Computer control system will automatically adjust the processing parameters to eliminate thermal error, thus improving processing accuracy.
Thermal error compensation method based on the neural network: This method adopts the neural network method. The remuneration process of the machine tool treatment process for errors.
The thermal error compensation method based on the analysis of the limited elements: this method consists in using the analysis software of the limited elements to model the machine tool. Thanks to the computer control system, the processing program is adjusted in real time to eliminate the impact of temperature changes on the precision of treatment.
The thermal error compensation method based on the thermal sensor: this method consists in installing the temperature sensor on the surface of the machine or the key parts to monitor the temperature modifications of the tool-tool in real time, and establish A model associated with the processing error. At the same time, the computer control system is used to adjust the processing parameters in real time to reach precise treatment.
These thermal compensation methods have their own advantages and disadvantages. For example, the thermal error compensation method based on the empirical model requires a large amount of historical data as a basis, and the heat error in the new environment cannot be taken into account; Heat error in various environments, but it takes a long time to train for a long time. Computer support; The thermal error compensation method based on the needs of thermal sensors, the increase in equipment costs and implementation difficulties. Therefore, in practical applications, selection and adjustment must be made according to the specific situation.
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