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A triangulation-based helical path generation method for high-speed NC milling of complex cavities

A CNC milling and triangulation technology, applied in the direction of program control, computer control, general control system, etc., to achieve the effect of improving kinematics characteristics and avoiding sudden changes in curvature

Active Publication Date: 2021-02-19
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] In order to overcome the deficiencies of the current spiral path design method for high-speed NC machining of complex cavities, the present invention provides a method for generating a helical path for high-speed NC milling of complex cavities based on triangulation, so as to realize high-speed NC machining of complex component cavities

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  • A triangulation-based helical path generation method for high-speed NC milling of complex cavities
  • A triangulation-based helical path generation method for high-speed NC milling of complex cavities
  • A triangulation-based helical path generation method for high-speed NC milling of complex cavities

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Embodiment Construction

[0034] A flow chart of a method for generating a helical path for high-speed CNC milling of complex cavity based on triangulation of the present invention is as follows: figure 1 shown. Below, with figure 2 Taking the contour machining of the seat cavity as shown as an example, the specific implementation process of the present invention will be described in detail with reference to the accompanying drawings and implementation steps. The specific implementation process is as follows:

[0035] (a) Triangulation of the plane machining area of ​​the cavity, the specific steps include:

[0036] a1. First determine the sampling interval in the x-direction and y-direction of the cavity plane machining area and Its calculation formula is as follows:

[0037]

[0038] In the formula, X b and Y b is the length of the plane bounding box of the cavity processing area in the x and y directions, int( ) is the rounding operation, L Δ is the side length of the mesh triangle, us...

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Abstract

The invention belongs to the technical field of multi-axis numerical control machining, and relates to a triangulation-based method for generating a helical path for high-speed numerical control milling of a complex cavity. Firstly, the plane processing area of ​​each layer of the cavity is divided into triangular grids; The mapping relationship between the triangularized plane processing area of ​​the cavity and the plane circular domain; then calculate the pitch increment between the plane spirals on the circular domain, and generate a segmented linear guiding helical curve through the linear interpolation of the spirals between adjacent circles ; Reversely map the guiding helical curve back to the cavity plane processing area to generate a helical machining path; finally use the B-spline curve to smooth the helical path to generate a smooth and continuous complex cavity high-speed CNC milling helical path. The spiral numerical control machining path generated by the method of the present invention can realize continuous milling of the cavity of complex components, avoid sudden changes in curvature in the traditional machining path, thereby ensuring the smooth and smooth movement of the tool, and is conducive to improving the movement of the numerical control machine tool when machining complex mold cavities mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of multi-axis numerical control machining, and relates to a method for generating a helical path for high-speed numerical control milling of complex cavity based on triangulation. Background technique [0002] CNC machining is an iconic machining technology in modern industry, and it occupies a dominant position in the machining of sophisticated and complex parts in the automotive, aerospace, ship, mold and other industries. According to statistics, more than 80% of CNC machining operations belong to cavity milling, so designing efficient and reliable cavity machining paths, especially spiral machining paths that can realize continuous milling, has become the key to efficient machining of complex cavities. The patent "A CNC Machining Method of Curved Surface Guided by Helical Lines" (patent number: CN200610134265.6) invented by Sun Yuwen et al. realizes the design of the spiral machining path on complex curv...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4099G05B19/41
CPCG05B19/4099G05B19/41G05B2219/34083
Inventor 徐金亭孙玉文潘通
Owner DALIAN UNIV OF TECH
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