碳/碳坩埚预制体增强碳纤维缠绕轨迹研究

RESEARCH ON WINDING TRAJECTORY FOR CARBON/CARBON CRUCIBLE PREFORM REINFORCED CARBON FIBER WINDING

碳/碳坩埚作为当前直拉单晶硅炉的重要部件,其需求急剧增加。针对目前碳/碳坩埚预制体采用针刺成型效率低且纤维连续性差等不足,本文基于纤维缠绕技术对碳/碳坩埚预制体成型进行研究,确定了最佳纤维缠绕路径规律,建立了非测地线缠绕模式下的缠绕机丝嘴运动轨迹算法,通过对比不同的约束条件得到了最佳运动轨迹,最后通过反解落纱点坐标来进一步验证缠绕机丝嘴运动轨迹的合理性及正确性。结果表明,本文提出的碳/碳坩埚缠绕方法准确可靠,得到的缠绕机运动方程及规律满足碳/碳坩埚的绕制原理和可制造性,可为碳/碳坩埚的生产提供理论支撑。

Compared with graphite crucibles,the excellent performance of carbon/carbon composite crucibles can better meet the needs of czochralski silicon production.Traditional carbon/carbon crucibles are formed by needle punching or manual winding,which has low efficiency and poor product consistency.The use of dry fiber reinforced carbon/carbon crucible can give full play to the role of carbon fiber,and can realize automatic winding and forming.Based on the filament winding technology,this paper aims to provide theoretical research on the automatic winding line design of carbon/carbon crucible preforms and simulation of winding trajectories of winding machines.First,according to the special asymmetric structure of the crucible,based on the principle of non-geodetic winding,the winding line of the carbon/carbon crucible preform is designed and simulated,and then the three-axis winding device is used to plan the movement trajectory of the winding line.The best motion trajectory is determined under different constraint conditions,and finally the method of polynomial fitting is used to reverse the coordinates of the doffing point and perform error analysis.The results show that the designed winding wire type can be stably and evenly wound on the core mold,and the designed winding motion track can achieve the specified winding wire type,which satisfies the winding principle and manufacturability of the carbon/carbon crucible.It provides a certain theo-retical guidance for the production of carbon/carbon crucible.