OBRABOTKAMETALLOV Vol. 24 No. 2 2022 TECHNOLOGY area for the location of the processing module. Besides, in view of the accepted width of the support rollers of the processing module, a section with a width of 100 mm from section No.1 is taken for the main technological base at the fi rst transition. The section is hereinafter designated as M-1. In the process of the 1st technological transition, the processing module is based on an unprocessed surface, and since the profi le of the longitudinal section in this area has non-rectilinear generatrices, the calculated trajectory of the ISCD will differ from the actual one. Therefore, the following rules are adopted for the machining route: The calculation of the trajectory of the movement of the ISCD should be be carried out along the cross section of the main technological base with a minimum value of k TFEC . Besides, _ max I p h is also calculated for this section. When calculating the values of , I k k pG h , in order to exclude the possibility of exceeding the maximum permissible value max per t , in the case of severe wear of the rolling surface of the riding ring, a corresponding reduction max per t is necessary. After performing the 1st transition, it is necessary to perform the operation of determining the geometric parameters of the accuracy of the shape of the machined surface areas and adjust the calculation of the machining route according to the data obtained. After performing the 1st transition it is necessary to determine the geometric parameters of the shape accuracy of processed surface sections and correct the calculation of the machining route based on the obtained data. In order to reduce the main processing time, it is rational to machine two small and adjacent surface areas (sections M-1 and M-2) until the required shape accuracy parameters are obtained on one of them. After obtaining a surface area with the required shape error, it is taken as the main technological base for processing the entire remaining surface. Thus, at the 1st transition, the calculation and simulation of the processing of a surface area 100 mm wide adjacent to the main technological base – M-2 – was performed (Fig. 8). According to the calculation of the parameters of the machining route technological modes in the developed software, the maximum cutting depth of the _max k t machined section M-1 for the 1 st transition was Fig. 8. Machining simulation result after fi rst transition
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