RU77743U1 - DISC FOR SOIL PROCESSING TOOLS - Google Patents

Abstract

The author has proposed a disk for a tillage implement, spherical, with cuts or without cuts, with a centering hole and with holes for mounting bolts. The new author believes that the disk is made two-layer, the hard layer of the disk is placed inside the sphere, the soft layer is on the outside of the disk, sharpening is made on the outside. The disk is made with a diameter D from 400 mm to 600 mm, a radius of the sphere Rсф from 600 mm to 700 mm, the hard layer of the disk has a thickness h1 from 0.8 mm to 1.5 mm and a hardness of HRC from 55 units to 65 units. The soft layer has a thickness h2 from 2.5 mm to 5.0 mm and a hardness of HRC from 20 units to 25 units. Point angle Y from 20 ° to 30 °, blade thickness S from 0.15 mm to 1.5 mm. The declared parameters of the disk layers, at the functional level, provide it with increased wear resistance with a simultaneous effect of self-sharpening. The deepening of the disc is facilitated, the energy consumption of the soil cultivation process is reduced. The technical result of the utility model is to improve the depth of the disk and maintain the sharpness of the disk. The industrial model is applicable.

Description

The proposed utility model is intended for a tillage implement, and more specifically, for disc harrows that use spherical discs.

Disks, depending on the diameter and radius of the sphere, the angle of attack and the angle of inclination to the vertical plane, can be used both in the main tillage, in the plow mode, and in the harrow or tiller mode.

Spherical disks used in disc harrows are known.

Disk pat. Utility Model No. 59361, А01В, 7/00, dated May 15, 2006, made of steel sheet curved around a sphere, with a sharpened edge, with a centering hole and no more than six holes for fixing bolts placed around a circle with a radius of 60 mm The disk has a spherical seat, with an inner radius of the sphere of the disk seat equal to 635 ± 10 mm and a diameter of the seat of at least 130 mm.

The disadvantage of such a disk is the poor penetration of the disk due to the large thickness of the disk wall and the rapid bluntness of the disk blade.

Known disk pat. The Russian Federation for utility model No. 466620, АВВ 7/00, dated March 4, 2006 - a prototype made of metal sheet material, curved around the sphere and having sharpening around the perimeter.

The disk is made around the perimeter without cuts, or with semicircular cuts with a radius of 47.5 mm and is equipped with no more than six holes for fastening bolts located at an angle of 5 ° 30 '± 30' to the axis of rotation, while the holes are located around a circle with a radius equal to 60 mm.

The disadvantage of the disk is that with a disk thickness of 6 mm, during operation, it breaks due to the arising loads, and the blade also quickly dulls and poorly cuts crop residues.

The technical result of the proposed utility model is to improve the depth of the disk and maintaining the sharpening of the blade edges while increasing the wear resistance of the disk.

The specified technical result is achieved by the fact that the disk is made two-layer, the hard layer of the disk is placed inside the sphere, the soft layer is on the outside of the disk, the grinding of the disk is made from the outside.

The disk is made with a diameter of D = 400 ÷ 600 mm, the radius of the sphere Rсф = 600 ÷ 700 mm, the hard layer of the disk has a thickness h1 = 0.8 ÷ 1.5 mm and hardness HRC = 55: 65, the soft layer of the disk has a thickness h2 = 2 5: 5.0 mm, the point angle Y = 20 ° ÷ 30 ° and the blade thickness S = 0.15 ÷ 1.5 mm.

The two-layer parameters of the inventive disk, at the functional level, provide it with a self-sharpening effect while improving the depth of the disk and, due to the hard layer, increase its wear resistance. The soft layer of the disk acts as a substrate for the solid layer.

The essence of the utility model will be described in more detail below.

Figure 1 presents a schematic drawing of the proposed disk for tillage tools.

The disk 1 has a centering hole 2 and holes for the mounting bolts 3, and is equipped with a blade 4. The disk 1 can be made with cuts, and without cuts. Figure 1 shows the disk without cutouts.

The disk 1 is made with a diameter D, which has a size range from 400 mm to 600 mm and a radius of the sphere Rсф, which also has a size range from 600 mm to 700 mm. Disc 1 is made of two-layer rolled products.

Layer 5 (see callout I) is placed inside the sphere and is made of solid steel, for example, grade XGO 1 with a thickness of h1 = 0.8 ÷ 1.5 mm and with a hardness of HRC = 55 ÷ 65.

Layer 6, made on the outside of mild steel, for example, grade 50, with a thickness h2 = 2.5 ÷ 5.0 mm and a hardness of HRC 20 ÷ 25, the soft layer functionally performs the substrate of the hard layer. The disk is sharpened from the outside with a sharpening angle Y = 20 ° ÷ 30 ° and a blade thickness S = 0.15 ÷ 1.5 mm.

The work of the disk is as follows.

Compared with commercially available spherical disks made of sheet steel, grade 65G, hardness HRC 46 ÷ 50, 6 mm thick, in a two-layer disk made of two-layer sheet metal, the inner layer is made hardened, for example, from X6F1 steel (HRC 57 ÷ 64) possesses increased wear resistance, and the outer layer is made, for example, of steel 50 (HRC 20 ÷ 25), which during operation abrades the soil faster than the hard layer and leaves the knife blade always in the sharp state and does not allow the hard layer to break off, since it performs substrate. The initial sharpening angle of 20 ° ÷ 30 ° is saved automatically as the outer and inner layers wear and erase at different speeds.

Disks with blunt blades have traction resistance 12–37% higher than sharp ones. The degree of cutting weeds with blunt discs, when the blade thickness of more than 1.5 mm is reduced to 75%, so it is not advisable to make the thickness of the hard layer more than 1.5 mm.

The wear of two-layer discs is 2-4 times smaller in diameter, i.e. their service life is higher.

Serial disks made of steel 65G due to regrinding and reduction in diameter have a service life of 3 ÷ 4 years.

An acute disk, having a large specific pressure on the soil, due to the small contact area of the disk blade with the soil, easily penetrates into it,

which reduces the weight of the harrow, i.e. its metal consumption, and consequently, the fuel consumption of the tractor, which tows the harrow in the field, is also reduced. Disks with a thickness of more than 6.5 mm are poorly buried in the soil, so the total thickness of the layers is maximum 6.5 mm.

Due to the fact that the disks used for peeling have a small depth of 4 ÷ 6 cm and a small diameter, and the disks operating in the plow mode have a depth of 20 ÷ 30 cm and a large diameter, the proposed range of disk diameters is 400 ÷ 600 mm and the radius of the sphere is 600 ÷ 700 mm cover all types of work: plowing, harrowing, peeling, such discs wrap well and crumble the soil.

All this ensures the achievement of a technical result.

The model is useful and technically applicable.

Claims (2)

1. A disk for a tillage implement, spherical, with cuts or without cuts, with a centering hole and with holes for fixing bolts, characterized in that the disk is made of two layers, the hard layer of the disk is placed inside the sphere, the soft layer is on the outside of the disk, the grinding of the disk is made with the outside. 2. The disk according to claim 1, characterized in that it is made with a diameter of D = 400 ÷ 600 mm and a radius of the sphere Rсф = 600 ÷ 700 mm, the hard layer of the disk has a thickness h1 = 0,8 ÷ 1,5 mm and hardness HRC = 55 ÷ 65 units, the soft layer has a thickness h2 = 2.5 ÷ 5.0 mm and hardness HRC = 20 ÷ 25 units, the angle of sharpening Y = 20 ÷ 30 °, the blade thickness S = 0.15 ÷ 1.5 mm .