Restoration of the working body of the John Deere 512 Disk Ripper with multi-layer front surfacing
2020
Strebkov, S., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Slobodyuk, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Bondarev, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation)
Modern technologies of soil cultivation during cultivation of agricultural crops are aimed at reducing mechanical action due to a justified reduction in the number of technological operations, as well as combining several operations on the technological platform of one machine-tractor unit, performed in one pass. One of the ways to reduce the impact on the soil is to exclude formation turnover during continuous tillage (ploughing). For this, deep rippers of various designs are used. The common element for them are the working bodies − metal intensive racks with cutting and crushing surfaces. Due to the difficult working conditions, including a large mass of the unit, high dynamic loads and intense abrasive wear, they determine the failure-free, long-eternity and maintainability of the structure. An analysis of the wear of the tip under operating conditions showed that the limiting state occurs when an average loss of 8.5 % of the weight of the tip by weight wear occurs. The results of micro-metering showed that the limiting state was linearly changed by the “toe-heel” parameter at an average of 9.7 %, and by the “toe-anterior hole” parameter, an average of 16 % of the new value. Therefore, the obvious fact is the presence of 84−90 % of the unused residual resource. In the laboratory of restoration of worn parts of the Belgorod State Agrarian University, the technology of frontal cladding with annealing rollers using heat-treated elements was developed to restore the tips of the working bodies of the 512 Disk Ripper. The incomplete use of the resource of the tip of the deep ripper was established when replacing it according to the manufacturer’s recommendations. The presence of the residual resource of the part by mass allows to repeatedly restore its operational state. The proposed technology for restoring the tip is 47 % cheaper than purchasing new ones. Moreover, their resource is increased by 50 %.
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