Cutting tool mode parameter uncertain curve five-shaft numerical control process parameter optimizing method

A modal parameter and tool technology, applied in the field of computer numerical control machining, can solve the problems of chatter vibration, can not reflect the processing status, can not achieve precision and efficient machining of parts, and achieve the effect of optimizing process parameters and improving accuracy.

Inactive Publication Date: 2009-07-29
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0003] The optimization of existing five-axis milling process parameters is based on the dynamic model of five-axis milling with certain parameters (Budak, E., Tekeli, A.2005.Maximizing chatter free material removal rate inmilling through optimal selection of axial and radial depth of cut pairs, CIRP Annals-Manufacturing Technology 54(1): 353-356), using the determined tool system modal parameters and cutting force coefficients to obtain the chatter stability cu

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  • Cutting tool mode parameter uncertain curve five-shaft numerical control process parameter optimizing method
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  • Cutting tool mode parameter uncertain curve five-shaft numerical control process parameter optimizing method

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[0017] The acceptance scheme of the present invention will be described in further detail below in conjunction with the drawings and examples, but the examples are not intended to limit the present invention.

[0018] The tool system modal experiment device that the embodiment of the present invention adopts is as figure 1 As shown, the carbon steel four-tooth ball-end cutter is selected as the processing tool, and the tool is clamped on the Mikron600U five-axis machine tool. The geometric parameters of the tool are: diameter 10 mm; helix angle 30 degrees; total length 100 mm; cantilever length 70 mm. According to the method of the present invention, the five-axis numerical control process parameter optimization of the curved surface with uncertain tool modal parameters is carried out, and the steps are as follows:

[0019] 1. Hit the tip of the tool with a hammer, such as figure 1 As shown, the knocking force is used as the excitation input signal, the output signal can be ...

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Abstract

The invention provides a method for optimizing uncertain curve-surface five-axis numerical control process parameter of the cutter modal parameters, belonging to the technical field of computer numerical control machining. The method for optimizing the machining process parameter comprises the steps as follows: firstly, the uncertain area of the cutter system modal parameter is obtained; a five-axis milling machining dynamic model is established; the input parameter of the model comprises a cutter system modal parameter area, a cutting force coefficient, a cutter geometry and a cutter path; the five-axis milling machining vibration stabilization curve is calculated; and by taking the five-axis milling machining vibration stabilization curve as a constraint, the process parameter optimization model is established and worked out by a sequence nonlinear planning method so as to obtain the optimized process parameter. As the invention considers the uncertainty of the cutter system modal parameter and is closer to the real machining condition, thus improving the exactness of the vibration prediction during the machining.

Description

technical field [0001] The invention relates to a method for optimizing process parameters of five-axis numerical control machining of curved surfaces, in particular to a method for optimizing process parameters of five-axis numerical control machining of curved surfaces in space considering the uncertain modal parameters of tool systems controlled by a computer. The invention belongs to the technical field of computer numerical control processing. Background technique [0002] During the five-axis machining process of aero-engine impellers, blade-like spatial surfaces, and mold-like difficult-to-machine materials, the machining accuracy of parts, surface quality of parts, and tool wear all depend on the reasonable selection of processing parameters. In order to meet the needs of high-efficiency and precision machining of parts, it is necessary to first ensure the stability of the machining process (no chatter), and then select optimized process parameters to achieve high ef...

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Application Information

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IPC IPC(8): G05B19/4097
Inventor 丁汉张小明朱利民朱向阳
Owner SHANGHAI JIAO TONG UNIV
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