搂膜弹齿式夹持装置的残地膜拉伸试验

Tension-test design and research of residual film for spring-tooth holding device

【目的】设计一种模拟搂膜作业状态下的弹齿式夹持装置,通过残地膜力学性能拉伸试验,对影响立秆搂膜机残膜回收作业效果的残膜力学性能指标(残地膜最大载荷、断裂延伸率)与残地膜破损程度、残膜回收作业速度之间的关系进行探究.【方法】以残膜破损情况、拉伸速度作为试验影响因素,以最大载荷、断裂延伸率作为试验指标,进行二因素三水平的正交试验,运用minitab数据分析软件,对残地膜力学性能拉伸试验所得试验数据进行统计与分析.【结果】试验结果表明,随着拉伸试验速度的增大,残地膜的断裂延伸率增大,残地膜破损程度与最大载荷之间表征出正相关性.【结论】其残地膜力学性能的研究为立秆搂膜机具的设计及其工作参数的探究提供了理论参考依据.

【Objective】To design a spring-tooth holding device with the simulation of raking-film working condition,and to study the relationship between the residue-film maximum loading,breaking elongation and breakage condition of residual film,tensile velocity through the mechanical property tension experiment for residual film.【Method】Two experiment parameters,including the damaging extent of plastic film and stretching velocity,were selected as the influence factors of test.The maximum load and elongation at break of plastic film were chose as the evaluation index of the orthogonal experiment.And the orthogonal experiment of two factors and three levels were conducted by using the data-analysis software of Minitab,the data of statistics and analysis was carried out with the residue-film tensile test.【Result】The breaking-elongation rate increased with the enlargement of tension velocity,and there was a positive correlation between breakage degree and maximal loading for the plastic-film experiment sample.【Conclusion】The research of mechanics performance of residual film may supply the design of the standing-stalk raking film machinery with the theoretical basis and the exploration of the working parameters.