采棉机摘锭钩齿群快速成型方法研究

Research on Rapid Prototyping Method for Picking Hook Tooth Group of Cotton Picker

针对我国目前采棉机摘锭需求量大,摘锭钩齿群加工效率低精度差等问题,通过对摘锭加工工艺分析,提出钩齿群快速成型机理,建立钩齿群快速成型刀具模型、机床结构模型和机床运动学模型。由摘锭几何尺寸及摘锭相对世界坐标系的位置确定刀具的加工姿态,并根据机床模型的三自由度可变轴坐标变换矩阵与刀具成型的姿态矩阵相等的关系求出三自由度可变轴旋转角度θ_(1),θ_(2),θ_(3)。通过Robotic Toolbox验证了机床三自由度可变轴运动学模型的正确性,并采用NX10.0运动仿真验证了钩齿群成型方法的可行性,为后续研究奠定理论基础。

In view of the large demand of cotton picker at present in our country,and the low precision of the processing efficiency of the hook gear group of the spindle picker,through the analysis of the processing technology of the spindle picker,the rapid forming mechanism of the hook gear group is put forward,and the cutter model,machine structure model and machine kinematics model of the quick forming of the hook gear group are established.The machining attitude of the tool is determined by the geometrical dimension of the spindle and the position of the spindle relative to the world coordinate system.According to the equal relationship between the transformation matrix of the three DOF variable axis coordinate of the machine model and the attitude matrix of the tool forming,the three DOF variable axis rotation anglesθ_(1),θ_(2),θ_(3)are calculated.The correctness of the three DOF variable axis kinematic model of the machine tool is verified by the Robotic toolbox,and the feasibility of the forming method of the gear group is verified by the NX10.0 dynamic simulation,which lays the theoretical foundation for the follow-up research.