RU169788U1 - PLUGH OF THE SUSTAINED BODY OF THE INCREASED HARDNESS, STRENGTH AND WEAR RESISTANCE - Google Patents

Abstract

The utility model relates to the field of agricultural engineering and machine repair, in particular to the design, manufacture, restoration and hardening of plow shares. The ploughshare contains a bow region formed by welding a bit of steel of increased hardness to the body of the ploughshare. The bit has a convex cylindrical working surface with a radius of curvature R = 0.5 m, the generators of which are parallel to the cutting edge of the share. Such a constructive solution provides a decrease in the wear rate of the bow part (chisel) of the share, as well as a decrease in the probability of lucid wear in the share of the share. 9 ill.

Description

The utility model relates to the field of agricultural engineering and machine repair, in particular to the design, manufacture, restoration and hardening of plowshares.

Known strip chisel ploughshare for dump plowing [1. Utility Model Patent No. 92824 RU, Bull. No. 10 dated 04/10/2010], the construction of which consists of a body and a chisel, welded butt-to-face with observance of the geometrical parameters of the share, due to agrotechnical conditions. Field sharpening of the bit and the blade is carried out in accordance with the established requirements. At the same time, the bit has increased hardness over the entire depth (HRC 50-58).

The design flaws include reduced hardness in the welded joint area and a high probability of lucid wear in the bow when the mechanism operates on soils with a high content of quartz and rocky inclusions.

The prototype is a plow share for dump plowing [2. Patent for invention No. 2413601 ⁽¹³⁾ C1, B23P 6/00, 2006.01 AO1B 15/04 2006.1]. The design of such a share consists of a body with a welded plate copying the geometrical shape of the share of the share and reinforced rollers located perpendicular to the field edge and the weld.

The design flaws include: relatively high resistance to movement of soil particles due to the presence of reinforced rollers, which leads to an increase in the wear rate (abrasion) of the bit and an increase in the likelihood of luminous wear in the bow of the share due to the concavity of the working surface of the plate, especially when working plow on wet soils.

The technical result of the utility model is to reduce the wear rate of the bow (bit) of the ploughshare (2), as well as to reduce the likelihood of the formation of radial wear (1) in the area of the ploughshare.

The technical result is achieved by welding to the body of the ploughshare along the cut-off line (3) of a bit (4) from steel of increased hardness with the formation of a weld (5), characterized in that it is made in the form of a cylindrical working surface with a radius of curvature R = 0.5 m, in which the generators are parallel to the cutting edge of the share.

The restoration of the share, and especially its bow, is associated with optimization of parameters and reduction of wear of the working surface.

Theoretical studies show that with the movement of an abrasive soil particle on the ploughshare surfaces of different shapes (Fig. 1), the specific pressure of the particle changes.

For this, we compose differential equations of particle motion along the Mx axis: for Figure 1, a

or

.

.

Since the body does not move along the Mx axis, the velocity υ _x = 0. Therefore, from equation (1) we have

.

.

For Figure 1, b, the pressure force (reaction) will be:

where ν is the particle velocity;

R is the radius of curvature of the working surface.

For Figure 1, the pressure force will take the form

Comparing equations (2), (3) and (4), we conclude that the specific pressure of the soil on the working surface of the ploughshare will be minimal when the particle moves along a convex surface, and maximum along a concave surface. This means that wear on working surfaces, depending on the specific pressure, all other things being equal, will be maximum.

The objective of the proposed ploughshare design is to increase its service life. This is achieved by welding a bit made of a material of increased hardness to the ploughshare body, having a convex cylindrical working surface with a radius of curvature R = 0.5 m, in which the generatrix of the cylindrical surface is parallel to the cutting edge of the ploughshare.

The essence of the utility model is the restoration of the worn nose surface of the share is illustrated by drawings,

where in FIG. 1 shows a worn ploughshare;

FIG. 2 - the worn out toe cap is cut off;

FIG. 3 - welded bit;

FIG. 4, a - bit;

4, b - the base of the bit;

4c - section AA.

The result of this technique is an increase in strength, a decrease in the wear rate and a decrease in the likelihood of lateral wear in the nose of the share.

The specified set of essential features ensures that the utility model has distinctive features, which meets the criterion of "novelty." In figures 1, 2, 3, 4 presents a design diagram of the proposed ploughshare.

Information sources

1. Patent for utility model No. 92824 RU. Bull. No. 10 dated 04/10/2010.

2. Patent for invention No. 2413601 ⁽¹³⁾ C1, B23P 6/00, 2006.01 AO1B 15/04 2006.1

Claims (1)

The plow share for dump plowing, which contains the nose region formed by welding a bit of high hardness steel to the ploughshare body, characterized in that the bit has a convex cylindrical working surface with a radius of curvature R = 0.5 m, the generatrices of which are parallel to the cutting edge of the share.

Images