Allocation design method for stiffness on different position of fixed joint surface of machine

A technology of fixed joint surface and parameter allocation, applied in the direction of design optimization/simulation, calculation, genetic law, etc., can solve the problems of inability to meet production requirements, difficulty in ensuring the dynamic characteristics of the machine tool with stiffness parameters, and time-consuming, so as to improve the performance. Processing efficiency and processing accuracy, strong operability, and the effect of reducing manufacturing costs

Inactive Publication Date: 2017-01-25
TIANJIN UNIV
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Problems solved by technology

This method is difficult to ensure that the stiffness parameters for the combination of many positions are optimal for the dynamic characteristics of the machine tool, and it takes a l

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  • Allocation design method for stiffness on different position of fixed joint surface of machine
  • Allocation design method for stiffness on different position of fixed joint surface of machine
  • Allocation design method for stiffness on different position of fixed joint surface of machine

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[0021] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings, figure 1 It is the overall flowchart of the inventive method, and the design method step for specific embodiment is as follows:

[0022] (1) Determine the parameters required for the precision machine tool to be analyzed

[0023] The various parameters required for the precision machine tool to be analyzed are the outer dimensions of the bed column, the relative position dimensions of the connection points of the joint surface, the quality parameters and the moment of inertia parameters of the bed column. The required geometric parameters of the bed column and joint surface to be analyzed are as follows: figure 2 As shown, the relative position size of the connection point of the combined surface is a 3 、a 4 、a 5 、c 4 、c 6 、c 7 、c 8 , ...

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Abstract

The invention discloses an allocation design method for stiffness on different position of fixed joint surface of machine, comprising the steps of (1) confirming every parameter of machine to be analyzed; (2) extracting all degree of freedom of bed and column of machine to be analyzed; (3) building dynamic model of bed and column system; (4) confirming the design space of variable and building equation of motion for non-damping vibration of system with multi degree of freedom; (5) constructing two-phase response surface model and conducting allocation design for the stiffness on different position of fixed joint surface of machine by using genetic algorithm iterative approximation optimum seeking technology; and (6) using finite element analysis software ANSYS to verify the optimize results. The method processes estimation and allocation design for the stiffness on different position fixed joint surface of bed and column and thus improves dynamic character of machine.

Description

technical field [0001] The invention relates to a stiffness parameter planning method at different positions of the fixed joint surface of a bed column of a machine tool, in particular to a method for assigning stiffness parameters at different positions of the fixed joint surface of a precision machine tool based on a response surface and a genetic algorithm. Background technique [0002] The dynamic performance of the machine tool has an important impact on the machining accuracy and efficiency of the machine tool. In the traditional machine tool design, the stiffness parameters at each position of the joint surface are allocated according to past experience. This method is subjective and is not conducive to ensuring the dynamic performance of the machine tool. [0003] At present, the distribution design of stiffness parameters at different positions on the fixed joint surface of precision machine tools is still limited to the optimal method of a single position. The essen...

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Application Information

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IPC IPC(8): G06F17/50G06N3/12
CPCG06F30/17G06F30/23G06N3/126
Inventor 张大卫张军傲石一光郭悟斌
Owner TIANJIN UNIV
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