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| In order to study the cutting performance and optimize the working parameters of cotton stalk cutting blade thus providing technical support for designing the cotton stalk cutter and harvesting equipment, using the harvesting and ripe cotton stalks as experimental material, the cutting test was performed in the microcomputer control electronic universal testing machine for different cutting blades with a self-made cutting device. An investigation was undertaken to study the effect of thickness of blade, blade angles, clamping angles, gap and the blade form combination of moving and stationary blade on the unit cutting force and the unit area cutting power of cotton stalk. The response surface analysis method was used to optimize the working parameters of the cutting blade. Through the test, the optimal combination of the cotton stalk cutting blade was achieved, it was that the form of moving and stationary blade was all sawtooth, the gap between the moving and the stationary blade was 0.32 mm, the thickness of the blade was 6.02 mm, the clamping angle was 47.04 and the blade angle was 28.05 . Under this condition, the unit cutting force of cotton stalk and the unit area cutting power of cotton stalk were the minimum, they were 4.8 N/mm2 and 57.4 kJ/m2 respectively. In application, the ultimate optimal combination of the cotton stalk cutting blade was that the form of moving and stationary blade was all sawtooth, the gap between the moving and the stationary knife was 0.3 mm, the thickness of the blade was 6 mm, the clamping angle was 47 and the blade angle was 28 . Under this condition, the unit cutting force of cotton stalk was 4.9 N/mm2 and the unit area cutting power of cotton stalk was 56.6 kJ/m2. This showed that the optimization result of the response surface analysis method was reliable and scientific. |
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| Keywords:cotton stalk; cutting blade; response surface analysis method; optimizing experiment; agricultural machinery |
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