Three-dimensional stability modeling method for orthogonal turning-milling machining of helical endmill

A technology of orthogonal turning and milling and modeling methods, applied in the direction of sustainable transportation, instrumentation, computing, etc., can solve problems such as poor surface quality, accelerated tools, etc.

Active Publication Date: 2015-07-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The occurrence of this instability or chatter will directly lead to poor...

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  • Three-dimensional stability modeling method for orthogonal turning-milling machining of helical endmill
  • Three-dimensional stability modeling method for orthogonal turning-milling machining of helical endmill
  • Three-dimensional stability modeling method for orthogonal turning-milling machining of helical endmill

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[0094] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0095] The three-dimensional stability modeling process of helical end mill orthogonal turning and milling is as follows: figure 1 shown, including the following steps:

[0096] 1) The machine tool-tool-workpiece system is equivalent to a vibration system connected by mass-spring-damper, such as Figure 2a , Figure 2b Shown:

[0097] Establish the coordinate system x of the vibration system...

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Abstract

The invention discloses a three-dimensional stability modeling method for orthogonal turning-milling machining of a helical endmill. The three-dimensional stability modeling method comprises the following steps: (1) simplifying a machine tool-cutter-workpiece system into a mass-spring-damper connected vibrating system, establishing a coordinate system xFyFzF, and establishing a kinetic equation of the vibrating system; (2) carrying out a hammering method modal test to obtain a frequency-response function of the vibrating system in each of xF, yF and zF directions, identifying the modal mass, the rigidity and the damping of the vibrating system, and calculating the inertia force, the spring force and the damping force of the vibrating system; (3) calculating a dynamic cutting force of the helical endmill; (4) solving the kinetic equation of the vibrating system to obtain a stability lobe graph of the vibrating system. The three-dimensional stability modeling method disclosed by the invention gives consideration to the three-dimensional dynamic cutting force of a circumference edge and a bottom edge of helical endmill, and simultaneously gives consideration to the dynamitic characteristics of a cutter side and a workpiece side, so that the stability modeling method is more accurate.

Description

technical field [0001] The invention belongs to the field of optimization methods for machining parameters of numerical control machine tools, and more specifically relates to a three-dimensional stability modeling method for orthogonal turning and milling of helical end mills. Background technique [0002] With the continuous development of the equipment manufacturing industry and the continuous improvement of the performance of machine tools and spindles, high-speed machining is more and more widely used in the manufacturing industry, especially in the field of aviation manufacturing. In the high-speed cutting process, in order to improve the processing efficiency, the material removal rate should be increased as much as possible, which also brings the risk of instability in the processing process. The occurrence of this instability or chatter will directly lead to poor surface quality and accelerated wear of tools, spindles and machine components. One of the most effecti...

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 闫蓉彭芳瑜龚艳红唐小卫李鑫
Owner HUAZHONG UNIV OF SCI & TECH
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