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Modeling method for modal of double-drive feeding system of numerical control machine tool

A dual-drive feed, CNC machine tool technology, applied in general control systems, control/regulation systems, simulators, etc., can solve the problems of unsolvable mode shape equations of continuous systems, cumbersome finite element software simulation operations, etc. The operability, the modeling method is intuitive, and the effect of high efficiency

Inactive Publication Date: 2017-08-29
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a modal modeling method for the dual-drive feed system of a CNC machine tool to solve the problems in the prior art that the mode equation of the continuous system cannot be solved and the simulation operation of the finite element software is cumbersome; the present invention provides A modal analysis method with operability and higher solution efficiency

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  • Modeling method for modal of double-drive feeding system of numerical control machine tool
  • Modeling method for modal of double-drive feeding system of numerical control machine tool
  • Modeling method for modal of double-drive feeding system of numerical control machine tool

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[0024] In order to illustrate the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0025] combine figure 1 A schematic flow chart of the present invention, a dual-drive feed system modal modeling method for a CNC machine tool of the present invention, comprising the following steps:

[0026] Step 1. Determine the generalized coordinates of the system: determine the degrees of freedom of the system, and select generalized coordinates to describe the motion state of the system, and the number of coordinates is the same as the number of degrees of freedom.

[0027] combine figure 2 , taking the position of the center of gravity of the worktable in a static state as the coordinate origin, establish the O-XYZ main coordinate system, the positive direction of the X-axis is perpendicular to the guide rail, the positive direction of the Y-a...

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Abstract

The invention proposes a modeling method for the modal of a double-drive feeding system of a numerical control machine tool, and the method comprises the steps: 1, determining the generalized coordinates of a system; 2, building a kinetic energy expression of a machine tool feeding system; 3, building a potential energy expression of the feeding system; 4, building an energy consumption expression of the feeding system; 5, building the position transformation relation between the coordinates of a sliding block and the coordinates of a workbench; 6, substituting an energy expression into a Lagrange equation, and obtaining a movement differential equation of the feeding system; 7, solving modal parameters, and solving the modal intrinsic frequency. The method is more visual, and the variable can be controlled. The change of the intrinsic frequency can be observed according to the change of a variable. The relation between the variable and the intrinsic frequency is more visual.

Description

technical field [0001] The invention belongs to the technical field of mechanical vibration analysis, in particular to a modal modeling method for a double-drive feed system of a numerically controlled machine tool. Background technique [0002] As one of the important components of the machine tool, the dynamic performance of the feed system is an important factor determining the performance of the machine tool. The dynamic performance of the machine tool needs to be considered in the design stage. The machine tool mode should be far away from the resonance area to reduce the impact of resonance on processing. At present, there are mainly two methods of modeling and finite element software simulation. [0003] Xu Xiangrong (Xu Xiangrong. Research on the dynamic performance of the ball screw linear guide rail feed unit [D]. Jinan: Shandong University, 2011) considered the influence of the rolling joint surface, and carried out dynamic modeling on the ball screw linear guide ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/408
CPCG05B19/4086G05B2219/35356
Inventor 胡小秋周义成韩兴李秋平
Owner NANJING UNIV OF SCI & TECH
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