Modification of a machine for chopping rice straw using circular saw

Abstract

Nowadays, the development of animal and poultry production needs to exert more efforts to increase and maintain high levels of feeding crop, in addition to improve the quality and quantity by decreasing losses during pre- processing operation and reducing the consumed energy. Our objective is to design various components of an Impact chopper like drive mechanism, shaft, rotor, hammers, casing, and discharge mechanism which will be useful in minimizing weight, cost and maximizing the capacity and also do their analysis. Impact choppers involve the use of impact rather than pressure to cut materials. The cutting process of agriculture plants is more complicated than the cutting of engineering materials (as steel, copper …etc.). This is due to that most of the engineering materials are homogeneous and isotropic, whereas the plants are non-homogeneous and non-isotropic materials. The usage of computer aided design (CAD) have changed the overlook of the industries and developed healthy & standard competition, as could achieve target in lean time and ultimately the product reaches market in estimated time with better quality and consistency. In general view, it has led to fast approach and creative thinking. The idea of development of the original machine which applies the theory of hammer knifes is supplying a new pre-cutting device to reduce the required time to chop the residues to the suitable cutting length. Therefore, this device would increase the performance and the capacity of the original machine.