CAJ | 학술논문

为了准确有效地实现偏差累积分析和装配精度预测,提出一种基于多维矢量环的装配偏差源敏感度分析方法.根据装配生产实际,将偏差源分为加工尺寸偏差、加工形状和位置偏差以及装配位置偏差三类;进一步将偏差源敏感度表示为装配尺寸微小变化的变化量与偏差源尺寸微小变化的变化量的比值.将装配连接形式抽象为面-面连接、面-弧连接、面-角连接、转动连接、弧-弧连接和固定连接,并分析每类连接形式的相对自由度.依据装配工艺确定的装配约束关系、装配顺序和定位方式,定位零件之间的连接点,建立零件的基准参考结构,并以此为基础建立偏差传递路径;依据偏差传递路径创建装配体多维矢量环,建立各维度的标量方程;利用一阶泰勒展开和矩阵变换方法,求解出敏感度表达式.以机翼内襟翼摇臂装配体偏差源敏感度分析为例,验证了该偏差源敏感度分析方法的有效性.
위료준학유효지실현편차루적분석화장배정도예측,제출일충기우다유시량배적장배편차원민감도분석방법.근거장배생산실제,장편차원분위가공척촌편차、가공형상화위치편차이급장배위치편차삼류;진일보장편차원민감도표시위장배척촌미소변화적변화량여편차원척촌미소변화적변화량적비치.장장배련접형식추상위면-면련접、면-호련접、면-각련접、전동련접、호-호련접화고정련접,병분석매류련접형식적상대자유도.의거장배공예학정적장배약속관계、장배순서화정위방식,정위령건지간적련접점,건립령건적기준삼고결구,병이차위기출건립편차전체로경;의거편차전체로경창건장배체다유시량배,건립각유도적표량방정;이용일계태륵전개화구진변환방법,구해출민감도표체식.이궤익내금익요비장배체편차원민감도분석위례,험증료해편차원민감도분석방법적유효성.
For deviation accumulation analysis and mechanical precision predicting effectively and accurately, a sensitivity analysis of assembly deviation source based on multidimensional vector loop is proposed. According to the actual production, deviation source is divided into three types: Dimension deviation, geometric and position deviation, and assembly location deviation. Deviation source sensitivity is defined as the ratio of assembly size variation and deviation source size variation. Assembly joint types are abstracted to six kinds: Planar, cylinder slider, edge slider, revolute, parallel cylinders and rigid. According to assembly constraint relations, assembly sequence and way of positioning, deviation transfer path is established by positioning the join between parts, and establishing part's datum reference frame. Assembly multidimensional vector loop is created by the deviation transfer path, and scalar equations of each dimension are established. Using the first order Taylor expansion and matrix transformation method, assembly deviation source sensitivity is solved. Taking assembly precision optimization of wing flap rocker as a research example, test the effectiveness and efficiency of the deviation source sensitivity analysis method.