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A shortest tool path generation method for step-nc complex cavity

A STEP-NC, tool path technology, applied in the direction of digital control, electrical program control, etc.

Active Publication Date: 2021-01-15
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] According to the technical problem of the lack of research on tool path generation methods for STEP-NC complex cavities in the prior art, the present invention provides a shortest tool for STEP-NC complex cavities path generation method

Method used

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  • A shortest tool path generation method for step-nc complex cavity
  • A shortest tool path generation method for step-nc complex cavity
  • A shortest tool path generation method for step-nc complex cavity

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Embodiment

[0067] Such as figure 1 As shown, the present invention provides a method for generating the shortest tool path for STEP-NC complex cavity, including the following steps:

[0068] S1. Constructing a STEP-NC complex cavity closed isometric ring, the specific process of the step S1 is as follows:

[0069] The closed isometric ring of complex cavity in STEP-NC includes: the calculation of the distance between the cutting tools, the offset of the basic element isometric and the generation of the closed isometric ring.

[0070] For the calculation of tool travel distance, in this embodiment, the allowable machining residual height h is 0.3 mm, the radius R of the tool handle is 1.9 mm, and the radius r of the round head of the tool corner is 0.6 mm. According to the calculation formula of the tool line spacing, the tool line spacing d=3.5mm; the calculation formula is as follows:

[0071]

[0072] The equidistant offset of the basic elements includes: the equidistant offset of...

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Abstract

The invention provides a shortest tool path generation method for a STEP-NC complex cavity, which comprises steps: S1, a STEP-NC complex cavity closed equidistant ring is constructed; S2, the closed equidistant ring is represented as a weighted directed graph with constraints based on a graph theory; S3, the traditional Dijkstra algorithm is improved through adding a to-be-selected node set T, andthe improved Dijkstra algorithm is used to generate the shortest tool path for the STEP-NC complex cavity. The graph theory and the improved Dijkstra algorithm are organically combined, the shortesttool path generation method for the STEP-NC complex cavity is put forward, generation of the shortest tool path for the STEP-NC complex cavity is realized efficiently and intelligently, and positive reference value is provided for further improvement and implementation of the STEP-NC standard.

Description

technical field [0001] The invention relates to the technical field of numerical control machining, in particular to a method for generating the shortest tool path for STEP-NC complex cavity. Background technique [0002] Intelligent manufacturing is the in-depth integration of new generation information communication technology and advanced manufacturing technology, and has become a major trend and core content of future manufacturing development. The intelligent numerical control system based on STEP-NC is one of the research hotspots in the field of intelligent manufacturing, and the tool path planning based on STEP-NC is a key technology to realize the intelligent numerical control system of STEP-NC. [0003] Scholars at home and abroad have conducted many meaningful studies on STEP-NC tool path planning. A new generation of STEP-NC controller proposed by Suh et al., which can realize the tool path generation of STEP-NC manufacturing features. Liu Tao et al proposed a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19
CPCG05B19/19
Inventor 张禹王志伟李东升董小野
Owner NORTHEASTERN UNIV LIAONING