An online temperature compensation method for thermal error of denture processing machine tool

Abstract

The invention discloses a false tooth machine tool thermal error online temperature compensation method. The method comprises the steps that a false tooth machine tool is in idle operation, and the temperature data of a number of positions of the machine tool, the displacement data of a processing tool rest and indoor temperature data are acquired in the operation process; the acquired temperature data are input into a BPN neural network; the acquired displacement data is compared with a prediction error value of the BPN neural network; a GA evolutionary algorithm is used to train the BPN neural network to acquire a trained neural network; the machine tool is turned on to carry out false tooth processing; in the processing process, the temperature data of a number of positions of the machine tool and the indoor temperature data are acquired and input into a trained neural network model to acquire the prediction thermal error value of the machine tool; and according to the prediction thermal error value, the machine tool corrects the processing path of a false tooth. According to the invention, the thermal error of the machine tool can be compensated; the false tooth processing precision is improved; and the method can be widely applied to the field of false tooth processing.

Description

technical field [0001] The invention relates to the field of denture processing for denture restoration, in particular to an online temperature compensation method for the thermal error of a denture processing machine tool. Background technique [0002] Teeth are important organs in the human oral cavity. In addition to chewing function, teeth also play a vital role in pronunciation, language and maintaining the normal shape of the face. Tooth and dentition defects, deformities and dentition loss are frequent and common diseases in dentistry. With the improvement of living conditions, people's awareness of dental health has increased, and they have higher requirements for the appearance of teeth. Denture restoration is The only way to solve these problems at present. [0003] The main component of natural teeth is calcification, which has high hardness and wear resistance. Therefore, the materials of dentures are mainly difficult-to-machine materials such as titanium alloy...

AI Technical Summary

Problems solved by technology

However, these current methods all focus on studying the influence of cutting force on dentures, but ignore the machining errors caused by CNC machine tools in the process of denture machining. Experiments have shown that, in fact, the heat generated by CNC machine tools during machining The influence of errors on the positioning accuracy of denture restorations greatly affects the accuracy of the processed dentures

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