Dynamic machining process planning incorporating in-process workpiece deformation data for large-size aircraft structural parts

ABSTRACT

In traditional machining process of large-scaled structural parts, the process-planned pre-machining process cannot respond to the unpredictable factors during machining process, and therefore the issues such as machining deformation cannot be well addressed. In this paper, a dynamic machining process planning based on deformation monitoring data is proposed so as to reduce machining deformation due to unpredictable factors. The influence rule of machining sequence on deformation is obtained by analysing the in-process workpiece deformation monitoring data, and the machining sequence can be adaptively adjusted in each machining layer for the purpose of machining deformation control. The part is partitioned into several areas to facilitate the machining sequence adjustment so as to ensure the machining efficiency while controlling deformation. Case study for algorithm validation and experimental validation is carried out, and the results show that the proposed online adaptive machining sequence adjustment method is effective in reducing machining deformation.

KEYWORDS:

• Process planning
• machining sequence
• adaptive adjustment
• deformation monitoring

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 51775278]; National Natural Science Foundation of China and China Aerospace Science and Technology Corporation [grant number U1537209]; Jiangsu Province Outstanding Youth Fund [grant number BK20140036].