The article covers analysis of the force interaction of knife and material being cut; the components of cutting force on the main operating elements of cutting tool are obtained. The mathematical analysis of the value of “clean” cutting component is given, and the cutting ability of the blade with purpose of improving the cut quality is determined.
The article describes the design of the working drum in a nut grinding machine and its design. Depending on the size of the nut and as a result of the experiments, the structure and dimensions of the parts of the nut grinder are determined and the basic procedure for preparing the parts in accordance with the structure is expressed. The rotation speed of the drum was determined taking into account the weight of the nut and centrifugal force. The speed with which the nut enters the device is calculated depending on the speed of rotation of the drum. The determination of this speed allows the machine to work normally, and at the same time increases its efficiency.
As it is well known the grain mixture entered for processing, is a mechanical mixture of different components, which can be up to 20% of different impurities. Modern cleaning machines of various modifications do not always provide high quality separation of grain mixture. Imperfection of these machines does not allow get the maximum effect of purification. In order to improve the quality and achieve a more stable and independent processes grain cleaning, it is proposed a new device for cleaning grain. The device comprises a chamber with air aspiration inclined perforated shelves and a boot device. In the study of moving grain particles doped with an inclined perforated shelf is advisable to use the general law of dynamics for the bodies of variable mass. Movement of the selected grains center of mass mixed with particles in the direction of the shelves as described in the fundamental equation of dynamics. While moving mass of particles with a mixture of grains, will be reduced by removing light impurities retracting force of the air flow. This mass is a function of time. Taking into account the reduction of total mass of grain particles, because of impurities reduction the motion equation used in the form of variable mass. There will be the same equations of motion along the other shelves, respectively, the equations are written for the first leg, but with different masses, as well as with other forces retraction.
The article covers technological reliability of thin lamellate knives in terms of accuracy in size and shape of cut blank, identifies the main reasons for the deviation of the cutting edge from the cutting plane, the block diagram of lateral deviation of lamellate knife and experimental setup are developed.
The article covers experimental study of knives with different sharpening angles to determine the strength properties of molded half-finished product and associated energy consumption for cutting. Determination of the values of the limiting shear stress of products depending on moisture content of the dough and the radius of rounding of the knife.
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