Design and Test of 6P-400 Buckwheat Peeling Machine

Aiming at problems of low peeling rate and low kernel rate of buckwheat peeling machine, a horizontal drum buckwheat peeling device was designed．Flexible peeling element was used to form a large gap with drum to realize impact, kneading and extrusion of buckwheat grains and complete peeling process．Based on measurement of grain structure parameters and peeling pressure of sweet buckwheat, peeling process and mechanism of the device were analyzed．Taking rotating speed and feeding amount as experimental factors, and peeling rate, half kernel rate and whole kernel rate of buckwheat grain as experimental indexes, single factor experiment and orthogonal experiment were completed．The single factor experiment showed that peeling rate reached more than 80% when rotating speed was 1 200 ~ 1 300 r/min, and half kernel rate and whole kernel rate were 45% and 15% respectively when feeding amount was 0.09 ~ 0.11 kg/s．Using Design-expert 8.0 software for data processing and response surface analysis of orthogonal test, and optimal parameters were determined as follows: rotating speed was 1 200 r/min and feeding amount was 0.09 kg/s．The validation test was repeated three times for optimal parameters．The average values were peeling rate 82.5%, half kernel rate 50.8 % and whole kernel rate 16.3%．The error was small and model prediction was reliable．