Analysis of needle changing mechanism of prefabrication stitching device of hard sandwich structure

doi:10.19936/j.cnki.2096-8000.20230828.015

Abstract

Abstract: The carbon fiber is used as the suture line in the suture device of sandwich structure with pre-punch function, and the optimized Tufting suture process is selected for suture. During the suture process, the needle change mechanism swings with the cylinder as the power source to realize the switch between the suture needle and the pre-punch needle. In order to make the swing process of the needle change stable, the needle change mechanism is simplified as a swing guide rod mechanism, and chose the method of Lagrange dynamics modeling. MTALAB was used to solve the dynamic equation, and the motion curves of each part of the needle exchange mechanism with time variation were obtained. Use of mechanical system dynamics simulation analysis software (ADAMS) built the virtual prototype model of suture device simulation. The theoretical analysis results were compared with the simulation results, then the accuracy of dynamic analysis of needle changing mechanism was proved. The experiment of solid prototype verified the effectiveness of the optimized Tufting suture process, and the needle changing mechanism met the working requirements, it establishes a theoretical basis for the improvement of the suture device and control system design of the prefabricated body suture device of sandwich structure with hard interlayer.

Key words: Tufting stitching, sandwich composites, oscillating guided bar, dynamic analysis

CLC Number:

TB332

SUI Kang, DONG Jiuzhi, CHEN Yunjun, JIANG Xiuming. Analysis of needle changing mechanism of prefabrication stitching device of hard sandwich structure[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(8): 101-107.

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