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Method for optimally designing dynamic property of complete machine tool

A technology of optimized design and dynamic performance, applied in calculation, special data processing applications, instruments, etc., can solve problems such as poor accuracy and low calculation accuracy, and achieve the effect of ensuring accurate assembly and simplifying the spindle structure

Active Publication Date: 2011-05-18
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0005] The purpose of the present invention is to aim at the current situation of poor accuracy and low calculation precision of the finite element model establishment method existing in the dynamic performance analysis of the existing machine tool

Method used

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  • Method for optimally designing dynamic property of complete machine tool
  • Method for optimally designing dynamic property of complete machine tool
  • Method for optimally designing dynamic property of complete machine tool

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Embodiment Construction

[0033] refer to figure 1 , the optimization design includes two parts: dynamic characteristic prediction and sensitivity analysis. According to the optimization design steps shown in the flow chart, the dynamic performance optimization of the whole machine tool can be realized. Taking the CNC boring and milling machine as an example, the entire design process and steps are described in detail.

[0034] refer to figure 2 , is the influence of the quality characteristics of each main component on the first six natural frequencies of the whole machine. For the first three natural frequencies, the mass of the ram, ram seat and column has the greatest influence.

[0035] refer to image 3 , is the influence of the stiffness characteristics of each main component on the first six natural frequencies of the whole machine. For the first two natural frequencies, the column, sliding seat and bed have the greatest influence.

[0036] refer to Figure 4 , is the influence of the sti...

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Abstract

The invention discloses a method for optimally designing dynamic property of a complete machine tool, which comprises the following steps of: establishing a complete machine tool entity parameterized model, simplifying the structure according to the analysis requirement on the dynamics and the structure characteristic of the machine tool; and guiding the simplified entity model into a finite element analyzing software ANSYS / Workbench for grid division to obtain a complete machine finite element model. The statics analysis is carried out through the ANSYS / Workbench to obtain a complete machine prestress field, and the mode of the complete machine tool under the prestress field is obtained through the mode analysis. The complete machine tool dynamics response of a main shaft, caused by a cutting force, under different rotating speeds is obtained through resonance response analysis on the complete machine tool, and the reference is provided for the searching of the dynamics thin link and the optimization design. Finally, by using the parameterized analysis method, the rule of influencing the complete machine tool dynamic property by the structure quality and the rigidity parameter is obtained, and the dynamic rigidity thin link is obtained and optimally designed.

Description

technical field [0001] The invention relates to a dynamic performance optimization design method of a machine tool based on finite element analysis, which includes a dynamic analysis finite element model modeling method and a dynamic performance prediction method. Background technique [0002] In the current design of machine tools, designers mainly proceed from the perspective of product functions, size parameters, motion parameters, dynamic parameters, and static strength and stiffness of the structure, and design based on experience and analogy methods, and insufficient consideration is given to the dynamic performance of machine tools in the design . However, the dynamic performance of the machine tool structure has a great influence on its working performance, efficiency, stability and reliability. At present, it has become an important index to measure the performance of the machine tool structure. [0003] In the dynamic performance analysis of machine tool structure...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张进华洪军王崴郭俊康朱林波
Owner XI AN JIAOTONG UNIV
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