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Cavity spiral milling machining feed rate and rotating speed offline planning method

A technology of helical milling and feed rate, applied in the field of cavity, which can solve problems such as low processing efficiency

Active Publication Date: 2020-05-19
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the above-mentioned patents have the problem of low processing efficiency

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  • Cavity spiral milling machining feed rate and rotating speed offline planning method
  • Cavity spiral milling machining feed rate and rotating speed offline planning method
  • Cavity spiral milling machining feed rate and rotating speed offline planning method

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Embodiment Construction

[0080] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0081] Such as Figure 1 to Figure 5 As shown, the present invention proposes a feed rate and rotational speed planning method with the goal of time optimization, that is, at each discrete parameter point, the machine tool motion speed, the acceleration of each motion axis, and the curve bow height error are established as constraints, and at the same time, the The maximum cutting force in the cutting process of the tool is less than the threshold as a constraint, and the critical depth of cut correspon...

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Abstract

The invention provides a cavity spiral milling machining feed rate and rotating speed offline planning method. Firstly, a cubic spline curve smooth spiral line is obtained, the spline curve track is equally divided and discretized according to parameters to obtain each discrete parameter point; a tool path formed by the discrete points is simulated to obtain radial cutting widths at the discrete points; a stable lobe graph is calculated and a corresponding relation between the rotating speed and the critical cutting depth is established; the corresponding relationship between the radial cutting width and the rotating speed at each parameter point and the critical cutting depth is utilized to establish a feeding speed and rotating speed planning model with optimal time at each parameter point, and a feeding speed and rotating speed plan with optimal time at each parameter point is obtained through forward planning and backward planning; the speed and the rotating speed in the whole parameter interval are obtained through fitting; and finally, the position, the maximum feeding speed and the rotating speed of each cutter location point are obtained, and corresponding NC codes are outputted for a specific machine tool numerical control system to be used for actual machining. The method is suitable for high-speed milling of the cavity.

Description

technical field [0001] The present invention relates to the field of mold cavities, in particular, to an off-line planning method of feed rate and rotational speed for helical milling of mold cavities, and more specifically, to a method that comprehensively satisfies the kinematic performance, mechanical performance and stability of the machining process of machine tools Off-line planning method of feed rate and rotational speed for cavity helical milling. Background technique [0002] Cavity milling is widely used in aerospace panel and mold machining. The cavity milling process is carried out layer by layer, which usually requires a long processing time due to the large size of the parts. Therefore, on the premise of ensuring high precision and high reliability, how to significantly improve the processing efficiency and reduce the time required for processing is an important issue in cavity processing. [0003] At present, the commonly used feed rate optimization algorit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19G05B19/416
CPCG05B19/19G05B19/4163G05B2219/35349G05B2219/36521
Inventor 雷阳丁烨郑建明
Owner SHANGHAI JIAO TONG UNIV
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