Taking the virtual axis machine prototype prototype VAMT1Y as an example, combined with the structural characteristics and control principle of the machine tool, the effectiveness is compared. The structural model of VAMT1Y can be referred to the literature.
First, the trajectory planning module of the virtual axis machine (usually with the aid of CAD software) uses the original part geometry information to generate the location file for the part. Then, through the data preprocessing system of the machine tool, the tool position file of the traditional machine tool is converted into a specific track file format of the virtual axis machine tool, and the job verification (such as working space, speed limit, etc.) is performed according to the characteristics of the machine tool.
If there is any problem, the error information is fed back to the trajectory planning module of the machine tool, and the tool position file is partially trimmed and then transmitted to the preprocessing system.
Using the virtual axis interpolation plan, the tool path file generated by the preprocessing system suitable for the virtual axis machine tool is coarsely interpolated in the virtual axis space (Cartesian space). According to the motion mapping relationship between the real axis and the imaginary axis, the motion instruction of the real axis is obtained. In order to achieve accurate motion trajectory, fine interpolation is performed on the movement process of the six drive rods of the real axis; finally, the position command of each sampling period is transmitted to the servo system to control the machine tool to achieve the final motion.
(Finish)
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