Research On The Working Performance Of The Standard Reciprocating Cutterbar

Standard reciprocating cutterbar (SRC) is one of the most important working parts of combine harvester. The evaluation of its working performance principal depend on the size of one time cutting area, repeated area and fail to cut area, which of them can be observed from the cutting chart. The performance of the SRC is the best when the one time cutting area is the greatest and the total area of repeated and fail to cut is the least.The velocity of machine moving, the crank rev and the abrasion of locomotory cutter, will affect the sizes of three area. At present, researches only described the changing trend of three area influenced by the velocity of machine working, but lack of the quantitative analysis. When certain parameter changes, what will happen in the cutting chart about three area quantitatively, and what disciplinarians we can find? However, we can't find related researches. With work parameters of the combine harvester changing, how does the three area change in the cutting chart and how to find the rules? This paper will focused on them.Making use of MATLAB—an effective tool with multifunction, this research analyzed mathematic expression of the displacement between portrait and landscape orientation firstly. Then the paper used MATLAB to draw the cutting chart, under two conditions, i.e., the certain crank rev (449r/min), the different velocity of machine moving and the certain velocity of machine moving (4km/h) and the different crank rev, figured out the size of one time cutting area, repeated area and fail to cut area, and drawed regularity curves between the velocity of machine moving, the crank rev and three area in the cutting chart. At the same time, under the certain crank rev (449r/min) and the certain velocity of machine moving (4km/h), the paper studied the abrasion degrees of locomotory cutter is how to influence three area and what disciplinarians we can get. Moreover, from the data analysis we can make some conclusions as follow:(1) Under a certain condition, the cutting chart can be drawed directly by MATLAB first.(2) Under various conditions, the paper worked out the size of one time cutting area, repeated area and fail to cut area first.(3) Under the crank rev is 449r/min, when the machine speeds up, one time cutting area and fail to cut area will also add continually, while repeated area will reduce continually. When the velocity of machine moving is 3 km/h, the proportion of one time cutting area withthe sum of fail to cut area and repeated area is 6.65.(4) Under the velocity of machine moving is 4 km/h, when the crank rev adds, repeated area will also add continually, fail to cut area will reduce, and the sum of repeated area and fail to cut area will reduce. Under the crank rev is 539r/min, one time cutting area is bigger than the sum of repeated area and fail to cut area comparatively. The proportion of them is 12.33.(5) Under the velocity of machine moving 4km/h and the crank rev 449r/min, with increasing of the abrasion of locomotory cutter, one time cutting area and repeated area will add gradually, fail to cut area will reduce gradually, the sum of repeated area and fail to cut area will reduce gradually, the proportion of one time cutting area with sum of fail to cut area and repeated area will add gradually. But in all, the extent of increase and decrease is not too much. In other words, the abrasion of locomotory cutter has light effect on the performance of the machine.