Three-dimensional Parametric Modeling of Non-circular Gear Sector of Automobile Steering Arm
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摘要: 提出一种基于SolidWorks二次开发实现非圆齿扇三维参数化建模的方法。利用展成法加工原理,在SolidWorks/VBA中编写程序代码对加工刀具及齿扇毛坯进行参数化建模,根据传动比曲线模拟齿扇插齿加工过程,生成非圆齿扇三维模型。将齿扇、齿条三维模型装配,进行动态干涉检测,并使用克林根贝格齿轮检测中心进行检测对比,以验证模型的正确性。结果表明使用这种建模方法得到的非圆齿扇三维模型是可行的,极大地方便了产品设计工作。
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关键词:
- 非圆齿扇 /
- 参数化建模 /
- SolidWorks二次开发
Abstract: A method based on SolidWorks secondary development is proposed to realize three-dimensional parametric modeling of non-circular gear sector. Using the processing principle of the forming method, the program code is programmed in SolidWorks/VBA to parametrically model the machining tool and the gear, and the machining process of the gear sector is simulated according to the gear ratio curve to generate a three-dimensional model for the non-circular gear sector. The three-dimensional model for the gear sector and the rack is assembled and subjected to dynamic interference detection, and Klingenberg Fiber Gear Testing Center for inspection and comparison is used to verify the correctness of the model. The results show that the present three-dimensional model for non-circular gear sector is feasible, which greatly facilitates the product design requirement. -
表 1 主要函数及参数
函数名称 操作参数 实现功能 CreateLine P1,P2 直线 CreateFillet Radius, ConstrainedCorners 圆角 SelectByID2 Name, Type, X, Y, Z, Appnd, Mark, Callout, SelectOption 选中草图或实体 FeatureExtrusion2 Sd, Flip, Dir, T1, T2, D1, D2, Dchk1, Dchk2, Ddir1, Ddir2, Dang1, Dang2, OffsetReverse1, OffsetReverse2, TranslateSurface1, TranslateSurface2, Merge, UseFeatScope, UseAutoSelect, T0, StartOffset, FlipStartOffset 拉伸凸台 InsertMoveCopyBody2 TransX, TransY, TransZ, TransDist, RotPointX, RotPointY, RotPointZ, RotAngleX, RotAngleY, RotAngleZ, BCopy, NumCopies 平移/复制 InsertCombineFeature OperationType, MainBody, ToolVar 布尔运算 表 2 标准刀具参数
参数名称 数值及单位 模数m 6 齿形角α 27.25° 齿全高h 11.5 mm 齿顶高t 5.88 mm 圆角半径r 2 mm 表 3 非圆齿扇加工参数
参数名称 数值及单位 大端直径Dmax 85 mm 小端直径Dmin 76 mm 齿宽B 46 mm 最大转角φ3 42.75° 切削角δ 6.5° 丝杆螺母导程l 9.5 mm 表 4 步距角为0.5°的干涉检验结果
齿扇旋转角度/(°) 干涉体积/ mm3 −25 0.173 −10 0.263 −2 0.225 2 0.225 10 0.263 25 0.173 表 5 步距角为1°的干涉检验结果
齿扇旋转角度/(°) 干涉体积/ mm3 −25 0.507 −10 0.562 −2 0.504 2 0.504 10 0.562 25 0.507 表 6 步距角为0.5°的齿扇模型齿距偏差
截面 模型齿距/mm 理论齿距/mm 偏差绝对值/mm 大端 17.891 72 17.892 39 6.7×10−4 中端 17.891 63 17.892 39 7.6×10−4 小端 17.891 64 17.892 39 7.5×10−4 -
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