RU2443524C2 - Method of increasing life of tillage equipment working tools - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention may be used in reconditioning tillage equipment working tool surfaces. Rolls are welded on perpendicular to axis of beam-like wear, spaced apart for 20-30 mm to produce spacing between them. Roll height does not exceed the level of working surface of the part being reclaimed. Said spacing is filled in operation by soil that acts as anti-abrasive medium.

EFFECT: higher resistance to abrasive wear.

1 dwg

Description

The invention relates to the field of machine repair and welding production, in particular to increasing the durability of the structural elements of the working bodies of tillage machines operating in direct contact with the soil.

There is a method of increasing the durability of the parts of the working bodies of tillage equipment by melting the resulting wear, followed by drawing out the deposited area and forming the working surface according to the technical conditions that meet the requirements for tillage [1].

The method is characterized by sufficient technological complexity and complexity and does not provide the necessary operating time to failure without the use of additional measures (surfacing reinforcement of the restored area) [1].

The closest technical solution, selected as a prototype, is a method of restoring and hardening products worn in an abrasive medium by eliminating wear by two-layer surfacing, where the first layer serves as a plastic substrate, and the second, with high hardness, provides increased wear resistance [2].

The disadvantages of this method of eliminating wear should be considered: the need for electrode materials with various properties, technological complexity in execution (obtaining a two-layer coating), low productivity, increased tendency to crack formation.

The technical result of the invention is to increase the durability of the parts of the working bodies of tillage agricultural machines by increasing the total resource by restoring them. At the same time, the resistance of the restored part of the part to abrasive wear increases, because the method is based on creating a “frame” in the area of wear with cavities that become clogged during soil cultivation by the soil (the soil “sticks”), which performs the function of an anti-abrasive component.

The specified technical result of the invention is achieved by surfacing the rollers in the worn area perpendicular to the geometric form of wear. Rollers are fused in the form of stiffeners at a certain distance from each other. This distance is determined by two factors: providing the necessary strength of the restored zone due to the creation of a frame structure and the possibility of sticking of the soil mass in the formed cavities, which is determined by the granulometric composition of the soil (the quantitative ratio of clay and sand). The height of the deposited rollers is limited by the depth of wear.

The claimed method is carried out due to a number of factors. The presence of rollers in the area of wear, acting as stiffeners, creates the conditions for ensuring proper strength when exposed to a part of the soil environment and thereby reducing the tendency of the restored area to fracture. The voids formed between the deposited areas serve as cavities that are filled with soil particles, which in this case play the role of an anti-abrasive medium and provide high wear resistance. The presence of such a structure of the restored section will allow to avoid an increase in traction resistance when using the sticking effect, because soil in cavities will not protrude beyond the working surface. In this case, there is no violation of the geometric parameters of the share established by the technical conditions and, therefore, all agrotechnical requirements for plowing will be fully implemented.

A comparative analysis of the claimed solution with the prototype shows that the claimed method differs from the known one in that the wear is eliminated by surfacing the rollers perpendicular to the geometric shape of the wear, acting as stiffeners and forming cavities that are filled with high abrasion resistance during operation. In this case, a surface is formed, which is a composite material, where the ploughshare material plays the role of the base, and the soil particles in the cavities act as the abrasion-resistant component. As a result, conditions are created to ensure the necessary strength properties and increase wear resistance. This method provides a reduction in technological complexity during its implementation and a tendency to crack formation. In this case, the same medium is used as the anti-abrasive component, which is processed - the soil. Thus, the proposed method meets the criterion of "novelty."

Known technical solutions include: hardening plowshares by eliminating the obvious wear of one- and two-layer surfacing, which is absent in the proposed method and allows us to conclude that it meets the criterion of "significant differences".

Figure 1 presents (as an example) a ploughshare with welded rollers (jumpers) at a distance α from each other in the area of radial wear, where:

1 - the working surface of the share in the worn area

2 - semi-ellipsoidal wear-like wear

3 - welded rollers (jumpers)

4 - soil particles

The implementation of this method is illustrated by the example of a serial plow share. Elimination of wear is carried out in 2 stages. The first is that the working surface of the ploughshare 1 is cleaned in the worn zone 2, then the beads 3 are surfaced perpendicular to the wear axis with a distance between them (α) of not more than 20-30 mm. The rollers should not be above surface level. The second - in the process of tillage, cavities are filled with soil particles 4, which acts as an anti-abrasive medium, which ensures an increase in the durability of the restored share.

Information sources

1. Mikhalchenkov A.M., Budko S.I., Parshikov P.A. Increasing the durability of plowshares by restoration and surfacing and hardening by welding reinforcement // Bulletin of the Bryansk State Agricultural Academy Scientific Journal - Bryansk - Publishing House BSHA - No. 2, 2005, - pp. 46-51.

2. Patent RU 2370351. The method of restoration and hardening of plow shares by eliminating the apparent wear of two-layer surfacing [text] / Mikhalchenkov A.M., Tyureva AA, Kozarez IV, Komogortsev VF, published on 10/20/2009, Byul. No. 29.

Claims (1)

The method of restoring parts of the working bodies of tillage machines with lateral wear of the working surface, including surfacing of the rollers in the wear area, characterized in that the rollers are fused perpendicular to the axis of the radial wear at a distance of 20-30 mm from each other with the formation of cavities between them, while the height of the rollers is not exceeds the level of the working surface of the restored part.

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