Development of innovative working bodies of tillage machines

Abstract

It was shown that plow working bodies for cutting the soil layer of composite structures are now increasingly used. Authors developed new composite working bodies for domestic plows and conducted fi eld operational tests. Authors also produced a batch of experienced new working bodies. There was applied promising steel having a tensile strength after heat treatment of more than 1580 MPa. Authors increased wear resistance of the blade frame and bits hardening hard alloy method of plasma surfacing. There was developed overhead retractable chisel, increasing the resource of the working body by an additional 25–40 %. There was improved geometry of the blade part was achieved by creating a curved surface of the front side of the involute type skeleton. It showed that on diff erent types of soils, experienced plowshares surpassed the serial resource from 2.0 to 4 or more times. It was established that the most metal-intensive and expensive part of the working body, the skeleton, in most cases, with the maximum operating time of the entire product has a working condition, and for further operation it is enough to replace a cheaper replaceable chisel. It was shown that the advantage of experimental working bodies with an overhead chisel over serial ones is the wear on medium soils with a hardness of up to 3.2 MPa per day 1.8–2.2 times, on heavy, hardness more than 4 MPa in 2.5–4.0 times.