Among the mechanised works for feed production, harvesting occupies a special place, both through the role it has in animal nutrition and specific characteristics of quality. In order to maintain quality of feed and keep losses to a lower level harvesting must be executed at optimal time and in a short time A basic operation of the technological process of harvesting of feed is cutting the stems of forage plants. The quality and quantity of harvested material are decisively influenced by this operation. Also the quantity, the quality of hay obtained, the growth and the subsequent forage production in the next years are determined by the way of execution of mowing. The mowing machine is used for cutting forage plants remaining from stubble in the form of continued swath with a smaller width than the working width of the machine. The cutting apparatus with two knives with reciprocating motion cuts the forage plants by shearing. The knives are supported and guided by gantries. The operating mechanism of the cutting apparatus with two knives from the mowing machine CDC 1,5 is the type connecting rod-crank-rocker. The knife and the swinging arms form an articulated parallelogram mechanism. The studies of this work were performed on a laboratory stand. The stand for experiments includes: mechanical mower with two knives, the drive of the mower, hydraulic, mechanical transmission and electric motor drive. Different revs of the drive shaft and different speeds of the mower’s knives were obtained by changing the transmitted reports.First were determined the velocities and accelerations of the forces acting on the knives in order to determine these forces. After studies have established the necessary conclusions and recommendations. In the context of an increased worldwide demand for food, is becoming increasingly important the use of technology to ensure increases of production on the same land area, while preserving biodiversity and preserving the environment.

Mowing machines, cutting apparatus, speeds, accelerations, forces, tensions

Presentation: oral