Method for designing key geometric parameters of end mill on basis of machining vibration

A technology of geometric parameters and design methods, which is applied in calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of unclear processing environment and processing objects, and it is difficult to exert the anti-vibration performance of unequal pitch milling cutters.
CN104298799AActive Publication Date: 2015-01-21SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2015-01-21

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Abstract

The invention provides a method for designing key geometric parameters of an end mill on the basis of machining vibration. The method includes the steps that modal testing is carried out on a machining system to obtain key modal parameters; dynamical modeling is carried out on the machining system, and a multi-time-lag second-order differential dynamical equation is established; a converted state-space equation is established; stability of the machining system is judged through a generalized Runge-Kutta (GRK) method, and Lobe graphs, namely stability graphs, in a machining parameter space are obtained; different Lobe graphs are obtained by changing design parameters namely values of tooth pitches and helical angles of the end mill; optimized tooth pitches and helical angles of the end mill are obtained by comparing the Lobe graphs under the condition of different design parameters with a goal of obtaining the maximum machining efficiency. Compared with traditional equal-tooth-pitch standard milling cutter machining, the method has the advantages that dynamic characteristics of the machining system are obtained through the GRK method, the optimized key geometric design parameters, namely the tooth pitches and helical angles, of the end mill are obtained, and machining efficiency is greatly improved.
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Description

technical field

[0001] The invention relates to the technical field of mechanical processing, in particular to a method for designing key geometric parameters of an end mill based on processing vibration. Background technique

[0002] In the field of machining, milling is one of the most common and commonly used processing methods. With the advancement of science and technology, people have higher and higher requirements for milling processing quality, and processing vibration is one of the key factors affecting processing quality. Reducing vibration, especially eliminating the influence of severe vibration or flutter, is an inevitable requirement to ensure processing quality. The causes of chatter include regenerative effect, modal coupling, friction, force-thermal coupling, etc. Among them, regenerative effect is the most important cause of milling chatter.

[0003] There are many ways to avoid the regenerative effect, among which the use of unequal pitch milling cutters...

Claims

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