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Method for predicting milling stability based on large stability domain 3-order linear formula

A linear formula, stable domain technology, applied in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2019-08-20
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to solve the problems existing in the milling stability prediction method, the present invention proposes a method for predicting the milling stability based on the third-order linear formula of the large stable domain

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  • Method for predicting milling stability based on large stability domain 3-order linear formula
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  • Method for predicting milling stability based on large stability domain 3-order linear formula

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] 1) According to the cutting dynamics, the dynamic equation of single-degree-of-freedom milling of flexible tool-rigid workpiece is:

[0048]

[0049] where m,ξ,ω n represent the modal mass, damping ratio and natural angular frequency of the tool respectively, a p is the axial depth of cut, h(t) is the cutting force coefficient, and

[0050]

[0051] Among them, K t , K n are the tangential and normal cutting force coefficients respectively, φ ...

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Abstract

The invention relates to the field of advanced manufacturing, and specifically relates to a method for predicting milling stability based on a large stability domain 3-order linear formula. The methodis characterized in that a forced vibration period term is fitted through a large-stability-domain third-order linear formula; a state transfer matrix of the milling system is obtained through discretization; and finally, the characteristic value of the transfer matrix of the milling system is judged through Nyquist criteria to predict the milling stability, and a certain theoretical basis and machining parameter guidance are provided for actual production and machining. Compared with other milling stability prediction methods, the method has the characteristics of high calculation efficiency, accurate prediction precision and the like.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, and in particular relates to a method for predicting milling stability based on a third-order linear formula in a large stability domain, which is mainly used for selecting reasonable cutting parameters in high-speed numerical control machining. [0002] technical background [0003] With the steady improvement of the requirements for parts in the three aviation manufacturing industries and the automotive field, it is concentrated on the high requirements for processing efficiency and surface quality of parts, and high-speed and high-precision cutting technology has emerged; in the cutting process, the selection of processing parameters is closely It is affected by the part itself and the cutting process. If the processing parameters are selected too conservatively, it will affect the improvement of processing efficiency. On the contrary, it will produce vibration marks on the surfac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/06
Inventor 严复钢于福航李茂月张统张爱鑫仲冬维宋厚旺
Owner HARBIN UNIV OF SCI & TECH
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