Five-axis side milling machining cutter path smoothing method

A tool path and milling technology, which is applied in the field of computer graphics and five-axis CNC side milling, can solve the problems of no description or report, no data collected, etc.

Active Publication Date: 2016-03-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

Method used

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  • Five-axis side milling machining cutter path smoothing method
  • Five-axis side milling machining cutter path smoothing method
  • Five-axis side milling machining cutter path smoothing method

Examples

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Embodiment

[0061] This embodiment provides a tool path smoothing method for five-axis side milling, which will be described in detail below with reference to the accompanying drawings.

[0062] In this example, if figure 2 , image 3 , Figure 4 as well as Figure 5 As shown, in this embodiment, the geometric deviation is calculated according to the two-parameter spherical envelope theory, and the smooth model of the five-axis side milling tool path is established by using the weighted least square method.

[0063] The five-axis side milling tool path can be represented by the tool nose point trajectory P(t) and the tool axis vector curve O(t) in the workpiece coordinate system

[0064] S(w; a, t) = P(t) + a·H·O(t)

[0065] in Indicates the set of control points of the tool path, including the control points of the tool nose point trajectory line and the control points of the machine tool rotation angle curve. H indicates the length of the tool edge. The formula for calculating t...

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Abstract

The invention provides a five-axis side milling machining cutter path smoothing method. The method comprises calculating the initial cutter location, and calculating the machine tool turning axle angle corresponding to the direction of a cutter axis through a dynamitic model of a specific machine tool; performing interpolation for the machine tool turning axle angle of the initial cutter location and the cutter nose point location, and obtaining a cutter nose point location trajectory and a machine tool rotation angle change curve; according to the cutter nose point location trajectory and the cutter axis vector, showing a side milling machining cutter path; calculating the rigidity matrix, corresponding to the cutter path, of the machine tool rotation angle curve; according to a differential evolution algorithm, calculating the point that the distance between the point to the cutter enveloping surface is shortest among the points on the design surface; and according to a weighted least square method, establishing a five-axis side milling machining cutter path smoothing model, and obtaining an optimized the initial cutter location and the cutter nose point location curve and a smooth machine tool rotation angle curve after solution. The five-axis side milling machining cutter path smoothing method solves the problem about smoothing and geometric deviation control of the five-axis side milling machining cutter path, and is suitable for five-axis side milling machining on a free form surface, a ruled surface or a curved surface similar to the ruled surface.

Description

technical field [0001] The invention relates to the technical fields of computer graphics and five-axis numerical control side milling, in particular to a tool path smoothing method for five-axis side milling. Background technique [0002] The processing of complex surface parts is carried out on machine tools. Therefore, when planning the machining path of the tool, it is necessary to consider the dynamic performance of the machine tool to avoid a large change in the angle of the machine tool's rotation axis. In the past, the tool path planning for side milling was carried out in the workpiece coordinate system. By making the direction of the tool axis smooth in the workpiece coordinate system, it is hoped that the movement of each axis of the machine tool will also be smooth. However, since the post-processing of the five-axis machine tool is a nonlinear model, the smooth machining path of the five-axis tool in the workpiece coordinate system does not mean that the moveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/408
CPCG05B19/4086G05B2219/35323
Inventor 朱利民卢耀安毕庆贞
Owner SHANGHAI JIAO TONG UNIV
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