Analysis And Experimental Research On Cam Mechanism Of Telescopic Curved Tooth Residual Film Cleaning Roller

In view of the fact that the picking rate of the plastic film in the cotton field in Xinjiang is not high enough,the side film is difficult to handle,and the operating cycle is tight,the Xinjiang Agricultural Mechanization Research Institute designed a drum-type residual film recycling machine.One-time joint operation of the delivery-type cotton straw crushing and returning machine.However,during the operation of the machine tool,not only the overall weight of the machine tool was found to be heavy,but also the problems such as the unreasonable design of the cam mechanism.For the problem of unreasonable structural design of the cam mechanism of the combined working machine,this paper mainly takes the telescopic curved tooth residual film cleaning roller as the research object,conducts theoretical analysis and research on it,and improves the inner chute cam disk.Improve the performance of the film picking mechanism,increase the picking rate of residual film,and provide a reference for the mechanized film collecting operation in cotton fields.(1)The mechanical properties of the plastic films with thickness of 0.01 mm and 0.012 mm at different coating time were tested,and the lateral tensile load of 0.01 mm film was 0.61 N～1.20N,and the longitudinal tensile load was 0.97 N～1.93 N,0.012 The transverse tensile load range of the mm-thick film is 0.92 N～1.57 N,the longitudinal tensile load range is 1.46 N～1.87 N,and the average transverse elongation at break of the 0.01 mm thickness film is 68.32%～231.79%,and the longitudinal average elongation at break The rate is 133.55%～320.02%,and the 0.012 mm thick film has a transverse average elongation at break of 108.58%～231.22%,and an average longitudinal elongation at break of 160.73%～310.11%.(2)According to the working requirements of the tool,the internal tooth spacing is determined to be 150 mm and the adjacent tooth spacing is 75 mm by the method of misaligned teeth.The trajectory equation of the inner chute cam disc and the tip of the film picking tooth determines the motion track of the film picking tooth,and calculates the film picking tooth group as 6 groups.(3)The transient dynamics analysis of the internal chute cam mechanism was performed by Ansys finite element software,and its working process was simulated to obtain the maximum force position and the maximum deformation position.The maximum stress received was 70.385 MPa,and the maximum deformation was 0.05543 mm.Machine work requirements.(4)Install the improved inner chute cam disc on the residual film cleaning roller for field test,set three factors and three levels orthogonal test,determine the main influencing factors affecting the residual film pick-up rate,and get all the factors to affect the main The order is:drum speed>tool advance speed>limit bolt height,the better combination is:drum speed is 65 r/min,implement advance speed is 3 km/h,and limit bolt height is 45mm,the residual film pickup rate 87%,compared with the residual film cleaning roller without improved inner chute cam disc,the residual film pick-up rate is increased by 10%.