PL
Przedstawiono analizę pracy noża frezującego zespołu uprawowo-siewnego maszyny do pasowego podsiewu traw na łąkach i pastwiskach. Zespół roboczy maszyny składa się z osłony, tarczy, noży frezujących i przewodu nasiennego. Istnieje ścisła zależność pomiędzy kątem ustawienia noża w stosunku do tarczy a prędkością cząstek gleby w kierunku jazdy, siła nacisku ze strony noża na cząstę gleby pozostaje prawie stała w czasie ruchu cząstki po nożu, tnące ostrze noża należy ustawiać prostopadle do toru ruchu cząstek. Tory ruchu cząstek gleby są zbliżone do prostoliniowych.
EN
To improve the botanical composition and to increase the yielding of meadows and pastures the strip resowing of grass and legume seeds in sward is applied. However, the resowing is efficient enough only in case when shooting seedlings do not meet the strong competition of growing ripe turf. Attempts to resowing grass seeds directly in the turf by using a seed-drill with disc coulters did not provide satisfactory results. At sowing in cultivated soil strips where the previous turf has been disintegrated and mixed with the soil, the seeds get into prepared seed-bed where competitive roots of previous vegetation are strongly limited. On the basis of theoretical considering the action of rotary soil cutting assembly, a prototype of combined tillage-sowing machine was designed and developed. Working assembly of the machine consists of a casing, the discs, soil cutting blades and seed supplying duct. The experiment confirmed usability of the machine for soil cultivation and grass resowing. The results showed that there exists a close relationship between the angle of cutting blade position in relation to disc, and the velocity of soil particles in moving direction. The pressing force of cultting blade on a soil particle is being kept almost constant during motion of the particle along the edge.