全自动制钉机的创新设计与运动仿真

Innovative Design and Kinematic Simulation of Automatic Nail Making Machine

针对机构容易出现死点位置、空间利用效率低(机构分布于单一平面)等问题,设计了一种全自动制钉机,包括送丝、夹紧、冷镦、冷挤和剪断机构。根据机构的运动特性,利用图解法设计冷镦机构中的曲柄滑块结构和夹紧、冷挤、剪断机构中的凸轮结构。凸轮光滑的轮廓曲线减少了夹紧、冷挤、剪断机构中死点位置的数量。利用解析法设计送丝机构中的槽轮结构,保证送丝的速度,进而保证送丝机构可以提供指定的钢丝长度。通过Solid Works建立三维模型,利用ADAMS对其进行运动仿真,并进行实验检验。结果表明,所设计全自动制钉机运动性能良好。

Aiming at the problems of dead center position and low space utilization efficiency in the mechanism(mechanism are distributed in a single plane),this paper designs a fully automatic nail making machine,including wire feeding mechanism,clamping mechanism,cold heading mechanism,cold extrusion mechanism and shearing mechanism.According to the movement characteristics of each mechanism,the crank slider in the cold heading mechanism and cams in the clamping mechanism,cold extrusion mechanism and shearing mechanism are designed by the graphic method.And the smooth contour curve of the cam can reduce the number of dead center positions in the clamping mechanism,cold extrusion mechanism and shearing mechanism,and improve the stability of the mechanisms.The analysis method is used to design the sheave structure in the wire feeding mechanism to ensure the speed of wire feeding and ensure that the wire feeding mechanism can provide the specified length of filament.Three-dimensional models were established by SolidWorks.Import these three-dimensional models in SolidWorks and perform their movement simulation with ADAMS.The results showed that the automatic nail making machine designed in this paper has good motion performance and mechanical properties.