THE MODERNIZATION OF MOWING-MACHINES USING THE SEGMENTED SHARP EQUIPMENT MOVING RECTILINEARLY

M. Mamuladze 1 , S. Tavberidze 1 and N. Beridze 2 . 1. Associated Professor, Batumi Shota Rustaveli State University. 2. Assistant Professor, Batumi Shota Rustaveli State University. ...................................................................................................................... Manuscript Info Abstract ......................... ........................................................................ Manuscript History

The experimental sample of rectilinearly moving segmented mowingmachine of new construction and of minor power is represented, which can be used in small contour as well as medium type plots and mining terms for preparing food for neat horned cattle. Mowing-machine has 3-7 kvt power engine, sharp machine, new construction equipment of adherence set between engine and sharp equipment necessary for mowing work process, safe and economic manufacturing.

…………………………………………………………………………………………………….... Introduction:-
Nowadays mowing-machines are equipped with basically segmented and rotationally sharp machines [3]. Segmented sharp machines work at comparatively low speed and have constructional complexity and relatively big weight and as for the mowing-machines having rotation sharp machines, they have big speed of working but as a result of practical research test in terms of mining field it was found out that they do not fully meet the requirements related to the harvesting without any loss but segmented machine which works on the principles of scissors through inter-action of segments dealt with the harvesting without any loss under the terms of mining field but with less productivity on the plot of one and the same area.
As you may know the presented mowing-machines basically work on rotation sharp machines having high work speed but during the rotation manual mowing-machine test process several times were the herb cultures cut to their stems and in case of field food making the process of cutting clean at comparatively low level which caused certain difficulties while harvesting. But in case of using segmented mowing-machine НеваКН -1.1 which is manufactured in Russia (http://machinspec.ru/kommunalnaya/kosilka/dlja-motobloka-neva.html) comparing to rotation type this process is excluded but in case of work low work speed terms we received the low productivity of machine. The aim of our research is to process machine for cutting without support, being rectilinearly relocating segmented one of new construction, which will solve mentioned problem.
Aim and methods of research. The aim of the scientific work research is to process the construction of rectilinearly relocating segmented sharp machine on the base of minor powered energetic means in terms of field for the alternative of using the mentioned in preparing raw food, namely, the forms of segments of sharp machine are processed, the mechanism for transmission, machine construction and safety transmitting mechanism. The basic parameters of machine will be calculated and relevant methods of optimization of its construction will be determined.
Review of research results. The stable food base of animal-breeding is the term for further development of important field of agriculture. In the process of working on the construction of sharp mechanism of mowing-machines we considered the basic events of agri-technique of mowing like: obtaining maximally good food, mowing down at the height of 4-4.5cm, the stem should be cut without extra parceling and tearing off, it should be well adjusted to relief and the grass mew should be set up in rows without touching motoblocks to wheels.
Considering the above mentioned gaps the rectilinearly relocating segmented sharp machine has been processed which has following parts:

Npic. Rectilinearly relocating segmented sharp machine
Escalating stars 1, 3, sharp segments 2, toothed trap 4, driving star 5, driving tooth wheel 6. Sharp machine of mowing relocates through electric or in-hous combustion engine driving star, which moves toothed trap, on which there are triangular sharp segments and sharp segments relocating rectilinearly which accomplished the work process of mowing. For the purpose of safe work of trap the leading star of sharp machine drives from mechanism of adherence which has the ability to protect when touching solid bodies or big resistance.It comprises: clipping mechanisms 3, plural stocks 1 and overlapping 2 when sharp machine works exceedingly n/sq.m. resistance, overlapping 1 stops at sharp machine, and through plural stocks engine makes unoccupied relocation. After resistance is taken off machine gets back to the work process of mowing.

Pic. 2. Mechanism of adherence
Cutting the stem of herbs is determined by many factors which are directly related to the stem consistency and sizes and the basic requirement of technologic process is the secrecy of machine, energy volume, taking good and quick harvest. Meeting this criteria depends on the efficiency of sharp machine sharp segment which is determined by following factors: Where -is the critical speed of edge, -speed of machine relocation. The distance between sharp segments is determined by following equation: Where α is the segment inclination angle and  is the absolute speed vector inclination corner of cutting edge. The coefficient of using sharp edge is calculated under equation E EExperimentally it is found out that following forces act on the cutting segment (pic. 4): material resistance , stem de-formation resistanceforce -, -friction force, friction resistance force on the edge at inclination -angle and normal -,and isrelated to in following way: Where is the projection of sharpening angle The stem consistency will be taken into consideration having following arguments : n/m 2 , n/m 2 , n.sm/m 2 , n=0,3, , n/m 2 , , . [2]. Based on the calculation we got : , , .
And the force of entire resistance is n.m 2 And the segment relocation energy in case of edge speed m/sec when relevantly receive: j.
j, j, j. Let's draw the graph of speed and circle energy volume: