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Thin-walled cylinder mirror image cutting modeling method based on shell theory

A modeling method, thin-walled tube technology, applied in the field of thin-walled tube mirror cutting modeling based on shell theory, can solve the problem of complex response of thin-walled mirror processing system

Pending Publication Date: 2020-12-29
TIANJIN UNIV
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Problems solved by technology

Due to the complex modal shape of the workpiece rotation and the influence of the thin-walled part itself, the response of the mirror image processing system of the thin-walled part is more complicated, and the existing modeling methods cannot well represent the vibration characteristics of the thin-walled cylindrical part

Method used

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  • Thin-walled cylinder mirror image cutting modeling method based on shell theory
  • Thin-walled cylinder mirror image cutting modeling method based on shell theory
  • Thin-walled cylinder mirror image cutting modeling method based on shell theory

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Embodiment Construction

[0084] A thin-wall cylinder mirror image cutting modeling method based on shell theory of the present invention will be described in detail below with reference to the embodiments and drawings.

[0085] Such as figure 1 As shown, the thin-wall mirror image processing system is mainly composed of an outer circle turning tool 3, an inner circle boring bar 2, a thin-wall cylinder 1, a machine tool spindle 4 and a machine tool tail top 5. The rigidity of the outer turning tool 3 is much higher than that of the cantilever boring bar 2 and the thin-walled cylinder 1, and the vibration in the cutting system is small, so the outer turning tool is equivalent to a rigid body, and the inner boring bar and thin-walled workpiece are equivalent to a flexible body body, get as figure 2 The simplified model shown.

[0086] Model the system dynamics of the workpiece:

[0087] 1. Simplified model of workpiece system

[0088] The processing object of this process system is a thin-walled cyl...

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Abstract

The invention discloses a thin-walled cylinder mirror image cutting modeling method based on a shell theory. The method comprises the following steps that 1, a thin-walled cylinder mirror image cutting process system is simplified; a turning tool is equivalent to a rigid body, a boring rod and a thin-walled cylinder are equivalent to a flexible body, and the thin-walled cylinder of a machined object can be seen as a cylindrical shell; a workpiece is to be fixed, centripetal force and Coriolis force generated when the part rotates are ignored, and the machining process is simplified into forcedvibration of the static cylindrical shell under excitation of rotating force; 2, a forced vibration equation of the rotary thin-walled cylinder is established by applying a shell theory; 3, a boringrod vibration kinetic equation is established; 4, a dynamic cutting force model of the cutting process system is established; and step 5, a mirror image cutting kinetic model of the thin-walled cylinder is established, and calculating and solving are carried out by utilizing a Runge-Kutta method.

Description

technical field [0001] The invention relates to the field of cutting and processing of metal materials. In particular, it relates to a thin-wall cylinder mirror cutting modeling method based on shell theory. Background technique [0002] At present, thin-walled parts represented by engine blades and thin-walled cylinders are widely used in aerospace, nuclear industry and other fields due to their light weight, compact structure, and superior comprehensive performance. In general, thin-walled parts often require high machining accuracy and surface quality, but the rigidity of thin-walled structures is poor, and large deformation and vibration will occur during processing. In addition, the machining system will vibrate under certain working conditions, which will have a devastating impact on the quality of the machined surface, tool life and even the accuracy of the machine tool. Therefore, the stability research in the machining process of thin-walled parts is very necessar...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F30/20
CPCG06F30/17G06F30/20G06F2119/14
Inventor 林滨赵良宇李龙兴
Owner TIANJIN UNIV
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