RU2462852C1 - Cultivator a-hoe - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agricultural engineering, in particular, the tillage details of working bodies of tillage machines. The working surface of the hoe blade on the back is reinforced with thermal-deformation effect to provide hardness of the back working surface of the hoe, exceeding the hardness of the outer surface of the blade, and the preservation of the hoe geometry.

EFFECT: design realisation enables to increase hoe resistance to abrasion wear keeping the hoe geometry when processing the soil with different granular composition and to ensure the effectiveness of its self-sharpening of blades.

2 dwg

Description

The invention relates to the field of agricultural engineering, in particular to tillage parts of the working bodies of tillage machines.

Known cultivator leg, the blade of which has a cladding of wear-resistant material with its penetration to the entire depth and filling with the electrode material a technological groove made from the back side [1].

The disadvantage of this cultivating paw is the presence of a protruding volume of the deposited metal beyond the geometric parameters established by the agrotechnical conditions, which will impede the movement of the cultivator paw, increasing traction resistance and increasing the energy performance of the cultivating unit. In addition, the need to manufacture grooves for subsequent surfacing leads to additional machining and the complexity of the process.

Closest to the claimed is the design of the cultivator legs, consisting of a ploughshare with a cutting edge, the blade of which has a surfacing of wear-resistant material [2].

The disadvantages of such a cultivating paw should be considered:

sufficiently high complexity of the process;

requires the use of a special deposited wear-resistant material;

there is a slight change in the geometry of the paw; the availability of specialized equipment.

The objective of the invention is to increase the resistance of the lancet paws of the cultivator to abrasive wear and maintain the geometry of the paws when processing soils of different particle size distribution, and to ensure the effect of self-sharpening the blade.

The essence of the invention lies in the fact that on the back of the cultivating paw in the area of the blade of the paw surface hardening is performed by concentrated energy flows, based on a complex thermal deformation effect when an electric current of high density (108-109 A / m ² ) and low voltage (2-6 C) through the contact zone of the part and the deforming electrode-tool (roller or plate) moving with feed S. The hardening depth of the cultivator paws may vary depending on operating conditions or t granulometric composition of the soil is determined by its ability to wear down. As a result, it is possible to increase the hardness of the blade and, as a result, the abrasive wear resistance of the cultivator paws, as well as to ensure the effect of self-sharpening, as hardened blade region is a section in two sections with different hardness. The back side is harder than the working, contacting surface, which contributes to the preservation of sharpening.

The specified set of essential features ensures the appearance of the claimed paws of new properties that are different from the prototype: an increase in hardness is achieved by deformation hardening of the blade to a certain depth; the geometry of the part remains unchanged and meets agricultural standards; by changing the current strength, supply and pressure on the working part of the tool, it is possible to control the depth of the hardened layer in a relatively wide range; obtaining the effect of self-sharpening the cultivator paws, which is absent in the prototype.

Thus, the claimed features of the invention meet the criterion of "novelty."

Figure 1 schematically shows the paw of a cultivator.

The cultivator paw has the following structural elements:

1 - the back side of the working surface;

2 - region of the blade;

3 - zone of increased hardness of the blade from the back;

4 - hardness area in the factory version.

Operational tests of the proposed lancet paws of the cultivator showed a greater operating time to the limit state than that of the factory-made paws.

The thermal strain hardening mode with a concentrated energy flow has the following parameters: supply 165 mm / min, pressure 660-750 N, current strength 700-1000 A, depth of the hardened layer 0.5 mm.

Information sources

1. Patent RU No. 694112. The working body of the cultivator / Yu.V. Verzilov, G.P. Myasoedov, V.M.Koltunov, G.A.Dunin, E.L. Kondratyev and N.D. Modin. Stated 06/14/74; published on 10/30/79, bull. Number 40.

2. Patent RU No. 2216138 C2. Cultivating paw / Strebkov S.V., Bulavin S.A., Makarenko A.N., Gorbatov S.A. Stated 06.15.2001; published on 11/20/2003.

Claims (1)

Lancet cultivating paw, characterized in that the working surface of the blade on the back side is hardened by thermal deformation to ensure the hardness of the back working surface of the paw, exceeding the hardness of the outer surface of the blade, and maintaining the geometry of the paw.