ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Feature-based uncut region tool path optimization method for skin parts machined by mirror milling system
Received date: 2015-07-28
Revised date: 2015-08-28
Online published: 2015-09-02
Supported by
National Science and Technology Major Project (2013ZX04001-021)
The equipment and the machining process of mirror milling system are effective for aircraft skin parts, whose particular process puts forward special demands on machining tool path, including equal tool path interval, non-cross, no tool retractions and no uncut region. Due to the complex shapes of machining features in aircraft skin parts, it is a difficult task to optimize tool path for uncut regions under the requirements of equal tool path interval, non-cross, no tool retractions. To solve this problem, a feature-based tool path optimization method for uncut regions is proposed. The process information is associated with geometric information based on features, and then the machining surface and its corresponding tool path are extracted automatically. Tool paths are divided into several subdivision tool paths to construct subdivision machining areas, and the final machining area is obtained by union Boolean operation. Then the uncut regions are detected by executing the subtraction Boolean operation between the machining surface area and the final machining area, and the optimized tool path satisfying the special tool path requirements is eventually generated according to the location of the uncut regions adaptively. A typical complex aircraft skin part is used to verify the proposed method and the result proves that uncut regions can be recognized automatically and the optimized tool paths which satisfy the special tool path requirements are generated. The proposed method can provide technical support for improving the NC programming efficiency for aircraft skin parts.
Key words： skin; mirror milling; uncut regions; recognition; tool path optimization
LIU Shaowei , LI Yingguang , HAO Xiaozhong , LIU Changqing , XIANG Bingfei . Feature-based uncut region tool path optimization method for skin parts machined by mirror milling system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(7) : 2295 -2302 . DOI: 10.7527/S1000-6893.2015.0240
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