CAJ | 학술논문

对月壤形成过程和物质组成进行了介绍,并将实际月壤基本物理力学指标与CUG-1型模拟月壤和普通干砂进行对比,认为在月球钻探取样过程中可能遇到具有一定胶结强度的硬质团块.为保证钻探取样顺利进行,需要研制月球钻探用特种取心PDC钻头.基于PDC钻头的碎岩机理,对钻头的负前角、旁通角、出露高度、钻头保径和PDC切削齿的钎焊工艺分别进行了设计,并对钻杆和钻头装配体在钻进过程中的受力过程进行有限元分析.最后,采用所设计的特种取心PDC钻头进行岩石干钻试验,试验结果表明,该钻头能钻进可钻性级别小于或等于6级的岩石,能满足月球钻探需要.
대월양형성과정화물질조성진행료개소,병장실제월양기본물리역학지표여CUG-1형모의월양화보통간사진행대비,인위재월구찬탐취양과정중가능우도구유일정효결강도적경질단괴.위보증찬탐취양순리진행,수요연제월구찬탐용특충취심PDC찬두.기우PDC찬두적쇄암궤리,대찬두적부전각、방통각、출로고도、찬두보경화PDC절삭치적천한공예분별진행료설계,병대찬간화찬두장배체재찬진과정중적수력과정진행유한원분석.최후,채용소설계적특충취심PDC찬두진행암석간찬시험,시험결과표명,해찬두능찬진가찬성급별소우혹등우6급적암석,능만족월구찬탐수요.
Forming process and composition of lunar soil were introduced in this paper, and the actual lunar soil physical and mechanical indexes were compared with and simulated CUG-1 lunar soil and normal dry sand, it was suggested that hard clods with certain cementing strength might be encountered in lunar coring drilling.To ensure the successful lunar co-ring drilling, a special polycrystalline diamond compact (PDC) coring bit should be developed.Based on the breaking rock mechanism of PDC bit, the negative rake angle, bypass angle, exposure height, gauge protection of PDC bit and brazing technologies of PDC cutters were designed respectively;and finite element analysis was made on the force of bit and drill stem assembly during drilling process.At last, the dry drilling test was made by special designed PDC bit, it indicated that the bit would be effective when rock drillability was less than or equal toⅥ, and it could stratify the requirements for lunar soil drilling.