RESTORATION OF "LEMKEN" PLOUGHSHARE KNIVES BY THE METHOD OF HEAT-STRENGTHENED COMPENSATING ELEMENTS

Abstract

The constructive and technological design of the "Lemken's" ploughshares knives allows providing a resource of up to 35-40 hectares when plowing heavy soils. Complex manufacturing technology, high market price (up to 8 thousand rubles per unit) and a certain shortage of branded knives in the spare parts market necessitates the restoration of these parts. However, the information about wear, their numerical value and geometry available in the public domain is insufficient and does not allow a reasonable approach to the development of technology to eliminate shape defects. There is no information about the use of the repair dimensions method when using technologies based on the method of heat-strengthened compensating elements. (Research purpose) The research purpose is analyzing the linear wear of the knives of the "Lemken" composite ploughshares to determine the possibility of their restoration by the method of heat-strengthened compensating elements using repair groups. (Materials and methods) It was noted that the technical condition of the knives after their operation was assessed by the residual dimensions: the width of the part in several sections; the distance from the first mounting hole to the toe; the thickness at several points of the part in accordance with the developed scheme. (Results and discussion) It was revealed that the maximum wear of the toe of the knives does not exclude the possibility of their further use. The maximum wear of knives in thickness also cannot be a reason for their decommissioning. The reason for the extreme condition of the knives is wear in width. (Conclusions) Proposed to divide worn knives into three repair groups. The use of the repair size method allows us to obtain a number of positive solutions that simplify the technology.