Optimization method of milling process parameters based on dynamic stiffness measurement of machine tools
A technology for process parameter optimization and dynamic stiffness, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve difficult-to-measure objects installation of measuring devices, complex grinding flutter stability curves, and discomfort for machine tool operators. mastery etc.
Inactive Publication Date: 2016-08-10
UNIV OF SHANGHAI FOR SCI & TECH
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However, this method is more complicated to determine the stability curve of grinding chatter in actual engineering, it is difficult to install various measuring devices on the measured object, and it is not suitable for machine tool operators to master
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[0044] The milling process parameter optimization method based on milling tool dynamic stiffness measurement of the present invention, its steps are:
[0045] 1. Dynamic stiffness measurement and calculation of machine tool milling cutter system
[0046] 1) Dynamic model of machine tool milling cutter system
[0047] Such as figure 1 As shown, the machine tool-tool system can be simplified as a two-degree-of-freedom vibration system in the X and Y directions perpendicular to each other, as shown in the following formula:
[0048] (1)
[0049] In the formula: , —the quality of the machine tool-tool system in the X and Y directions respectively;
[0050] , —respectively, the damping of the machine tool-tool system in the X and Y directions;
[0051] , —the static stiffness of the machine tool-tool system in the X and Y directions, respectively;
[0052] , — are the component forces acting on the cutting force of the tool in the X and Y directions, respecti...
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The invention relates to a milling technological parameter optimizing method based on machine tool dynamic stiffness measurement. The method comprises the steps of 1. measuring and calculating the dynamic stiffness of a machine milling cutter system, specially, (1) building a dynamic model of the machine milling cutter system, (2) measuring and calculating the static stiffness of a machine milling cutter, and (3) measuring and calculating the natural frequency and the damping ratio of the machine milling cutter system; and 2. optimizing milling machining technology. According to the method, based on the measurement and calculation of the static stiffness and the dynamic stiffness of the milling machine cutter system, the deformation of a cutter during the milling process is obtained by measuring and calculating the static stiffness and the dynamic stiffness of the machine tool on the X direction and the Y direction and combining the milling force in the milling process, and the milling force during milling the milling machining technological parameters are optimized by utilizing genetic algorithm; and the method is easily operated, has high practicality, and has significance to improvement of machining precision and machining efficiency of actual milling.
Description
technical field [0001] The invention relates to a milling process parameter optimization method, in particular to a milling process parameter optimization method based on the measurement of the dynamic stiffness of a machine tool tool. Background technique [0002] During the CNC milling process, the machine tool, tool and workpiece together form a dynamic system of the cutting process. The dynamic phenomena such as cutting force, machining deformation and vibration have become the key factors that determine the quality and efficiency of CNC milling. Therefore, it is of great significance to optimize the milling process parameters through the measurement and calculation of the dynamic system in the cutting process to provide processing quality and processing efficiency. In the past, the process parameters in the grinding process were generally determined according to the stability curve of the grinding chatter, so that the grinding task could be completed with the highest ef...
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IPC IPC(8): G06F19/00
Inventor 李郝林迟玉伦
Owner UNIV OF SHANGHAI FOR SCI & TECH