CN109807180B

CN109807180B - Low-alloy high-boron high-speed steel roller with special-shaped rolling groove

Info

Publication number: CN109807180B
Application number: CN201910111774.4A
Authority: CN
Inventors: 吴江
Original assignee: Jiangsu Huanyu Metallurgical Technology Co ltd
Current assignee: JIANGSU HUANYU METALLURGICAL TECHNOLOGY Co.,Ltd.
Priority date: 2019-02-12
Filing date: 2019-02-12
Publication date: 2021-01-15
Anticipated expiration: 2039-02-12
Also published as: CN109807180A

Abstract

The invention relates to a low-alloy high-boron high-speed steel roller with special-shaped rolling grooves, which comprises a roller body, a roller disc, roller shoulders and a shaft head, wherein two ends of the roller body are fixedly installed on the roller disc through fixing pieces; the quantity of the metal piece that can hold and the disintegrating slag when further increase the normal work of roll to realize metal piece and disintegrating slag at the ascending removal of axial and the axial discharge of finally being convenient for through the notch, guarantee the normal work of roll, extension roll life improves roll availability factor.

Description

Low-alloy high-boron high-speed steel roller with special-shaped rolling groove

Technical Field

The invention relates to a roller structure, in particular to a low-alloy high-boron high-speed steel roller with a special-shaped groove.

Background

The roll is one of main working devices required in steel rolling production in the prior art, the quality of the roll directly affects the surface quality, the internal strength, the rolling time and the rolling cost of rolled materials, and how to pour the roll which can meet the same or even higher strength requirement with less alloy component content and lower production cost under the current conditions is always a problem which is widely concerned by various enterprises at present.

In addition, in the process of realizing plastic deformation of the metal positioned in the middle of the rollers due to mutual extrusion, metal scraps and slag which are possibly generated and fall due to fragmentation in the process of plastic deformation of the metal are easily accumulated and filled in each rolling groove, and after the metal scraps and slag are accumulated to a certain degree, the normal work of the rollers can be affected, and even the hidden power trouble is buried due to the locking of a mechanical structure.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a low-alloy high-boron high-speed steel roller with a special-shaped groove.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a take low alloy high boron high speed steel roll of dysmorphism grooving which characterized in that: the roller comprises a roller body, a roller disc, a roller shoulder and a shaft head, wherein two ends of the roller body are fixedly mounted on the roller disc through fixing pieces, the roller shoulder is positioned at the outer end of the roller disc, the shaft head is positioned at the outer end of the roller shoulder, a multi-layer rolling groove structure is arranged on the outer peripheral surface of the roller body, the rolling grooves comprise first rolling grooves which are completely coated on the outer periphery of the roller body and are arranged in an outward protruding mode, second rolling grooves which are partially coated on the outer periphery of the roller body and are arranged in an outward protruding mode, and third rolling grooves which are circumferentially distributed with a plurality of protrusions and are arranged in an inward concave mode at equal intervals, the first rolling grooves and the second rolling grooves are alternately distributed in the axial direction of the roller body, and the third rolling grooves are positioned between two adjacent first rolling grooves and second rolling grooves.

Further, the second rolling groove is provided with 4 grooving openings at equal intervals in the circumferential direction.

Further, the grooving angle of the grooving opening is 5 °.

Furthermore, the plurality of protrusions arranged in the circumferential direction of the third rolling groove at equal intervals comprise a first protrusion surface and a second protrusion surface which are mutually angled, and the first protrusion surface is connected with the second protrusion surface through a middle connection surface.

Furthermore, the first convex surface and the second convex surface mutually form an included angle of 90 degrees.

Further, the middle connecting surface is an arc surface.

Further, the circumferential length of the first convex surface is greater than the circumferential length of the second convex surface.

Further, the axial dimensions of the first groove, the second groove, and the third groove are equal.

Further, a circumferential length of the notch is less than a circumferential length of the first raised surface.

Furthermore, 24 protrusions which are arranged inwards are distributed on the third rolling groove at equal intervals in the circumferential direction.

The invention has the beneficial effects that:

(1) aiming at the defects that the wear resistance is poor and the accident resistance is weak and the service life of the roller is reduced due to the fact that expensive alloy elements are often adopted in the components of the high-speed steel roller to ensure enough roller strength at present, a proper amount of cheap boron is added into the roller to replace the expensive alloy elements, the alloy cost is reduced, high-hardness boride is generated through the reaction of the boron and iron on the basis of ensuring the original roller strength, the wear resistance of the roller is improved, the hardenability and the hardenability of the roller can be improved through the addition of the boron, and the strength and the toughness of the roller are improved through the matching with other alloy elements.

(2) Through first rolling groove and second rolling groove at the axial of roll shaft alternate distribution, the third rolling groove is located between two adjacent first rolling grooves and the second rolling groove, thereby on guaranteeing mutual extrusion and realizing the basis of its inside metal continuous plastic deformation, set to make its both ends be formed with the accommodation space that can hold metal piece and disintegrating slag with the indent of third rolling groove, thereby further increase the metal piece and the amount of disintegrating slag that can hold when the normal work of roll, and realize metal piece and disintegrating slag at the ascending removal of axial and finally be convenient for discharge at axial both ends through the fluting, guarantee the normal work of roll, extension roll life, improve roll availability factor.

Drawings

FIG. 1 is a schematic structural diagram of a low-alloy high-boron high-speed steel roller with a special-shaped groove according to the invention;

FIG. 2 is an enlarged view of the outer periphery of the low-alloy high-boron high-speed steel roll with the special-shaped groove.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1-2, a low-alloy high-boron high-speed steel roll with special-shaped grooves comprises a roll body 1, a roll disk 2, roll shoulders 3 and a spindle head 4, wherein two ends of the roll body 1 are fixedly mounted on the roll disk 2 through fixing pieces 5, the roll shoulders 3 are located at the outer end of the roll disk 2, the spindle head 4 is located at the outer end of the roll shoulders 3, a multi-layer groove structure is arranged on the outer peripheral surface of the roll body 1, the grooves comprise first grooves 11 completely coated on the outer periphery of the roll body 1 and convexly arranged, second grooves 12 partially coated on the outer periphery of the roll body 1 and convexly arranged, and a plurality of third grooves 13 uniformly distributed in the circumferential direction at equal intervals, wherein the first grooves 11 and the second grooves 12 are alternately distributed in the axial direction of the roll body 1, and the third grooves 13 are located between the adjacent first grooves 11 and the second grooves 12, so that expensive alloy elements are often adopted to ensure sufficient roll strength in the components of the conventional high-speed steel roll, thereby resulting in poor wear resistance and high-cost The roll has the defects of weak accident and reduced service life, the roll is added with proper amount of cheap boron to replace relatively expensive alloy elements, the wear resistance of the roll is improved by generating high-hardness boride through the reaction of boron and iron on the basis of ensuring the original roll strength while the alloy cost is reduced, the hardenability and hardenability of the roll can be improved through the addition of the boron element, and the strength and the toughness of the roll are improved through the matching with other alloy elements; meanwhile, the first rolling grooves and the second rolling grooves are alternately distributed in the axial direction of the roller body, and the third rolling groove is positioned between the two adjacent first rolling grooves and the second rolling groove, so that on the basis of ensuring mutual extrusion to realize continuous plastic deformation of metal inside the third rolling groove, the concave part of the third rolling groove is arranged to enable the two ends of the third rolling groove to be provided with accommodating spaces capable of accommodating metal scraps and crushed slag, the amount of the metal scraps and the crushed slag which can be accommodated when the roller normally works is further increased, the metal scraps and the crushed slag are moved in the axial direction through the grooving opening, axial discharge is finally facilitated, normal work of the roller is ensured, the service life of the roller is prolonged, and the use efficiency of the roller is improved.

Specifically, the second rolling groove 12 is provided with 4 notching openings 121 at equal intervals in the circumferential direction, and the metal chips and the slag are moved in the axial direction through the notching openings and finally discharged at two axial ends, so that the normal work of the roller is ensured, the service life of the roller is prolonged, and the use efficiency of the roller is improved.

Specifically, the notching angle of the notching 121 is 5 °.

Specifically, a plurality of that third rolling groove 13 equidistantly laid on circumference is protruding including first bellying 131 and the second bellying 132 that each other is the angle, be connected through intermediate junction face 133 between first bellying 131 and the second bellying 132, realize through intermediate junction face that extrusion metal guarantees its continuous plastic deformation's basis on, the indent through the third rolling groove sets to make its both ends be formed with the accommodation space that can hold metal chip and disintegrating slag to the volume of metal chip and disintegrating slag that can hold when further increasing the normal work of roll.

Specifically, the first convex surface 131 and the second convex surface 132 are mutually inclined at an angle of 90 °.

Specifically, the middle connecting surface 133 is a circular arc surface, so that the roller can not be damaged by sharp corners during the extrusion deformation process.

Specifically, the circumferential length of the first convex surface 131 is greater than the circumferential length of the second convex surface 132, so that the rotation and installation directions are visually distinguished, and metal chips and slag are retained in a gap with a large volume as much as possible along with the rotation of the roller, thereby ensuring the stable rotation.

Specifically, the axial dimensions of the first rolling groove 11, the second rolling groove 12 and the third rolling groove 13 are equal, so that the axial stress balance during extrusion deformation is ensured.

Specifically, the circumferential length of the notch 121 is smaller than the circumferential length of the first convex surface 131, so that the influence on the metal chips and the slag in the gap with large volume caused by the overlarge circumferential length of the notch 121 is avoided.

Specifically, 24 protrusions are arranged in the third rolling groove 13 at equal intervals in the circumferential direction.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a take low alloy high boron high speed steel roll of dysmorphism groove, the roll includes roll body (1), roller dish (2), roller shoulder (3) and spindle nose (4), the both ends of roll body (1) are fixed in through mounting (5) installation on the roller dish (2), roller shoulder (3) are located the outer end of roller dish (2), spindle nose (4) are located the outer end of roller shoulder (3), be provided with multilayer groove structure on the outer peripheral face of roll body (1), its characterized in that:

the rolling grooves comprise first rolling grooves (11) which are completely wrapped on the periphery of the roller body (1) and are arranged in an outward protruding mode, second rolling grooves (12) which are partially wrapped on the periphery of the roller body (1) and are arranged in an outward protruding mode, and third rolling grooves (13) which are arranged in an inward recessed mode and are provided with a plurality of protrusions at equal intervals in the circumferential direction, wherein the first rolling grooves (11) and the second rolling grooves (12) are alternately distributed in the axial direction of the roller body (1), and the third rolling grooves (13) are located between two adjacent first rolling grooves (11) and the second rolling grooves (12);

the plurality of protrusions which are distributed in the circumferential direction of the third rolling groove (13) at equal intervals comprise a first protrusion surface (131) and a second protrusion surface (132) which form an angle with each other, and the first protrusion surface (131) is connected with the second protrusion surface (132) through a middle connecting surface (133);

the first convex surface (131) and the second convex surface (132) form an included angle of 90 degrees;

the middle connecting surface (133) is an arc surface;

the circumferential length of the first convex surface (131) is greater than the circumferential length of the second convex surface (132);

the second rolling groove (12) is provided with 4 grooving openings (121) at equal intervals in the circumferential direction;

the circumferential length of the notch (121) is smaller than the circumferential length of the first raised surface (131).

2. The low-alloy high-boron high-speed steel roll with the special-shaped grooves as claimed in claim 1, which is characterized in that: the grooving angle of the grooving opening (121) is 5 degrees.

3. The low-alloy high-boron high-speed steel roll with the special-shaped grooves as claimed in claim 1, which is characterized in that: the axial dimensions of the first rolling groove (11), the second rolling groove (12) and the third rolling groove (13) are equal.

4. The low-alloy high-boron high-speed steel roll with the special-shaped grooves as claimed in claim 1, which is characterized in that: 24 protrusions which are arranged inwards are distributed on the third rolling groove (13) in the circumferential direction at equal intervals.