KR101049439B1 - Disc roll for wire rod rolling - Google Patents

Abstract

The present invention relates to a disc roll used for rolling a wire rod.

The disc roll for wire rod rolling of the present invention comprises an outer roll member made of cemented carbide and an inner roll member made of steel, which is cast in the inner diameter portion of the outer roll member, and is formed into the inner roll member by casting. The recessed body is projected on the inner circumferential surface of the outer roll member, the discontinuity is formed in the recess and the locking body penetrating the discontinuity is formed on the outer surface of the inner roll member, so that the outer roll member on the locking body of the inner roll member. Its feature is that the structure is such that the locking body is hung in the circumferential direction.

Wire Rod, Rolled, Disc Roll, Carbide Alloy

Description

Disk roll for rolling wire rod

The present invention relates to a disc roll used to roll a wire rod, and more particularly, to form an inner roll member by casting on an inner diameter of a cylindrical outer roll member made of a cemented carbide and having an inclusion projecting on an inner circumferential surface thereof. The solid body is buried inside the inner roll member, and a discontinuity is formed in the recess, and a locking body penetrating the discontinuity is formed on the outer surface of the inner roll member so that the recess is caught in the circumferential direction. It is related with the disc roll for wire rod rolling which has a structure.

The roll used to roll the wire rod is, as shown in Figure 1, at least one rolling hole (G1, Groove) is formed along the circumferential direction on the outer peripheral surface, the shaft hole (H1) for penetrating the shaft through the center is provided It is the disc roll 1 which takes the shape of the ring (or the cylinder).

As the above-mentioned wire rod rolling disc roll 1 is arranged in close contact with the upper and lower pairs, the upper and lower rolling dies G1 form the grooves for rolling, and the wire rod passes through the rolling die between the two rotating disc rolls. The wire rod is rolled by the method of rolling. The wire rod is pressurized with a very large load by the disc roll during rolling. Therefore, the disc roll has to have high hardness and excellent wear resistance. The disc roll for wire rod rolling uses cemented carbide powder. It is common to be made with.

By the way, the disc roll having the above structure and made of cemented carbide as a whole is not only expensive but only 20-30% of the thickness in the radial direction.

That is, the outer circumferential surface of the disc roll is gradually worn out as the wire rod is rolled, and after 20-30% of the thickness in the radial direction is worn out from the first outer circumferential surface, it is no longer used and discarded.

Therefore, in order to solve the problem that more than half of the expensive disk roll 1 is discarded, a disk roll having a detachable prefabricated structure has been developed.

As shown in Fig. 2, the prefabricated disc roll 2 includes: an outer roll member 21 having a smaller thickness in the radial direction than the disc roll 1 made of cemented carbide as a whole; An inner roll member 22 in close contact with an inner circumferential surface of the outer roll member 21; A closing member 23 in close contact with each side of the inner and outer roll members 22 and 21 so that the outer roll member 21 does not escape from the outer circumferential surface of the inner roll member 22; Tightening bolt 24 for fixing the closing member 23 to the side of the inner roll member 22; It is composed of a structure.

Unlike the disc roll 2 of the above-described assembled structure, as shown in Figure 3, by casting the inner roll member 32 to the inner diameter of the outer roll member 31, the inner and outer roll members 32, 31 Composite roll type disc roll (3) is also developed.

The prefabricated or composite troll type disc roll as described above has the advantage of reducing the original unit of the disc roll of the wire rod rolling because only the outer roll member is made of cemented carbide.

However, when the wire is rolled, a lot of heat is generated according to the plastic deformation of the wire rod, the heat of plastic deformation is different depending on the rolling state, and the rolling line may be stopped. In addition, since various loads due to high speed rotation are applied to the disc roll, slip may occur between the inner and outer roll members.

That is, the prefabricated or composite troll type disc roll is generally used in limited cases in special cases such as low speed and low rolling rate rather than high speed and high rolling rate.

As a prefabricated disc roll having a new structure was developed to solve the problems caused by the relaxation between the inner and outer roll members of the prefabricated or composite trolley type disc roll type disc rolls, domestic registered utility model No. 205987 "Wired disc rolls" are published in the issue.

The assembled disc roll of the above invention, as shown in Figure 4, the annular coupling flange (F) having a plurality of coupling holes (H2) protrudes along the circumferential direction of the inner circumferential surface of the outer roll member 41, the coupling Annular inner roll member 42 having a plurality of coupling holes (H2) is in close contact with both sides of the flange (F), respectively, the matching coupling holes (H) of the outer roll member 41 and the inner roll member 42 The fixing bolt (B) is fastened to the structure, and the outer roll member 41 and the pair of inner roll members 42 are fixed by a plurality of fixing bolts (B), so that the problem of relaxation is solved. There is an advantage to use.

However, the design of the Utility Model No. 205987 is complicated to assemble because it combines the inner and outer roll members using a plurality of fixing bolts (B), it is difficult to evenly tighten the tightening force of all fixing bolts (B) evenly. When the wire input of the fixing bolt (B) falls due to vibrations, heat, etc., accompanied by the rolling of the wire, more vibrations may occur, which may result in poor rolling.

In the present invention, the disc roll is separated into the inner and outer roll members so as to minimize the consumption of expensive cemented carbide, and the loosening phenomenon such as slip between the two roll members in harsh wire rolling such as vibration, plastic deformation heat, and high speed rotation. It is an object of the present invention to provide a disc roll that is prevented.

In addition, there is another object of the present invention to provide a disc roll that can be used for wire rod rolling as it is manufactured without a separate assembly.

The above object of the present invention, one or more inclusions protruding on the inner peripheral surface of the cylindrical outer roll member, the inner roll member cast to the inner diameter of the outer roll member to cover the inclusion body, between or between the inclusion body and the enclosure A locking body or the like formed integrally with the inner roll member so as to penetrate the three-dimensional shape.

In the disc roll for wire rod rolling of the present invention, the inner roll member is cast on the inner diameter of the outer roll member, and the locking body integrally formed on the outer surface of the inner roll member traverses the inclusion body provided in the outer roll member in the axial direction. As a result, in spite of any external influences due to the rolling of the wire rod, the relaxation phenomenon such as slip between the inner and outer roll members is prevented, so that stable high-speed rolling of the wire rod is possible.

In addition, since the outer roll member, which is relatively thin in thickness in the radial direction, is used as compared to the disc roll made of cemented carbide as a whole, the manufacturing cost of the wire rod can be reduced, and the inner and outer roll members are formed because the inner roll member is formed by casting. Discomfort due to the assembly is eliminated.

The present invention relates to a cylindrical disk roll formed with one or more rolling dies along the circumferential direction of the outer circumferential surface for rolling the wire rod.

The disc roll for wire rod rolling of the present invention, the outer roll member made of cemented carbide 85 is in direct contact with the wire rod, and the inner roll made of steel and coupled to the inner diameter of the outer roll member fixed to the outer peripheral surface of the rotating shaft It is a structure composed of members.

Disc roll of the present invention composed of the inner and outer roll member as described above, the inner roll member coupled to the inner diameter of the outer roll member is formed by casting, the inner roll member is embedded in the inner roll member from the outer peripheral surface of the inner roll member The recess is provided on the inner circumferential surface of the outer roll member, the locking body for fixing the circumferential direction in the circumferential direction has a technical feature of the present invention in the structure provided on the outer circumferential surface of the inner roll member.

In the disc roll of the present invention, the inclusion body projecting on the inner circumferential surface of the outer roll member may be formed at least one shorter than the inner circumferential surface, may be formed only in the shape of the annular flange, one box shorter than the circumference When a solid is provided, the part cast on the circumference outside the inclusion body becomes a locking body, and when a plurality of inclusion bodies shorter than the circumference are formed, the part casting on the circumference between the two housing bodies becomes a locking body, It becomes a structure which catches the said latching body in the circumferential direction.

By the way, when one of the inclusion body protrudes in the circumferential direction in the circumferential direction, because the flange is continuous in the circumferential direction, it is possible to obtain a structure in which the engaging body is caught in the circumferential direction. By forming the discontinuous portions that are not three-dimensionally continuous, a bridge-shaped locking body that crosses the discontinuous portions in the axial direction by casting is formed on the outer surface of the inner roll member.

As described above, the disc roll for wire rod rolling of the present invention is provided with an inclusion body on the outer circumferential surface of the outer roll member, and the engaging body is formed in the circumferential direction on the outer circumferential surface of the inner tumble roll member on which the inclusion body is buried. The outer roll members can prevent the circumferential movement relative to each other.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

Fig. 5 is a perspective view of the invention one embodiment disc roll, Fig. 6 is a partial cutaway perspective view of the outer roll member constituting the invention one embodiment disc roll, and Fig. 7 is an outer side constituting the invention one embodiment disc roll. 8 is a cross-sectional view and a side view of the roll member, and a perspective view of an inner roll member constituting an embodiment of the present invention disk roll.

As shown, the disc roll for wire rod of the present invention,

A cylindrical outer roll member 51 formed along a circumferential direction of the outer circumferential surface, having a concave body 51A protruding from the inner circumferential surface, and having a through hole H3 formed in the center thereof;

Shaft hole (H1) is cast on the inner diameter of the outer roll member 51 so that the outer surface is in close contact with the inner surface of the outer roll member 51, and has the same center as the through hole (H3) of the outer roll member (51) An inner roll member 52 formed at the center portion thereof; And so on.

In this case, the recess 51A which is projected to the inner circumferential surface of the outer roll member 51 and embedded into the inner roll member 52 cast in the inner diameter portion of the outer roll member 51 may be formed to protrude in various forms. However, as shown in FIG. 6, when one of the indentations 51A protrudes in the shape of a flange, a discontinuous portion D is formed that is partially broken without making the indents 51A in the shape of a complete ring. Be sure to

By doing the above, the engaging body B which is the part which transverses the said discontinuous part D in the axial direction is formed in the outer surface of the inner roll member 52 to be cast, and this locking body B is included A structure in which the three-dimensional body 51A is hung in the circumferential direction is made.

Although the discontinuous portion D is formed in the form of a groove on the inner circumferential surface of the inclusion body 51A, as shown in FIG. 9, the discontinuous portion D may have a shape of a complete hole penetrating the annular inclusion body 51A in the axial direction. .

Alternatively, as shown in FIG. 10, one or more completely separated housings 51A may be intermittently protruded along the circumferential direction, such that the enclosure 51A is hung in the circumferential direction. There is no particular limitation on the structure, shape, shape, and the like of the locking body B and the containment body 51A, as long as it can be a structure that is caught by.

1 is a perspective view of a conventional cemented carbide integrated disc roll.

Figure 2 is a cross-sectional structural view of a conventional assembled disc roll.

Figure 3 is a cross-sectional structural view of a conventional cast disc roll.

Figure 4 is an exploded perspective view of another conventional assembled disc roll.

5 is a perspective view of a disk roll according to the first embodiment of the present invention.

Figure 6 is a partially cut perspective view of the outer roll member constituting the first embodiment of the present invention.

7 is a cross-sectional view showing an outer roll member constituting the first embodiment of the present invention;

Figure 8 is a perspective view of the inner roll member constituting the first embodiment of the present invention.

9 is a partial cutaway perspective view of a third embodiment of an outer roll member of the present invention;

10 is a partial cutaway perspective view of a fourth embodiment of an outer roll member of the present invention.

    ((Explanation of symbols for main part of drawing))

   51. Outer roll member 51A. Inclusion

   52. Inner roll member B. Locking body

   D. Discontinuity G1. Rolling Mold

   H1. Axle H3. Through hole

Claims (4)

In the disk roll for rolling wire rod formed with one or more rolling dies along the circumferential direction of the outer circumferential surface, An outer roll member 51 having an indentation 51A protruding from an inner circumferential surface thereof and having a through hole H3 formed in an axial direction in a central portion thereof; The inner surface of the outer roll member 51 is cast so that the outer surface is in close contact with the recess 51A, the inner roll member formed in the center shaft hole (H1) having the same center as the through hole (H3) 52; Including, The recess 51A has an annular shape, and a discontinuous portion D is formed on an inner circumferential surface of the recess 51A, and an outer surface of the inner roll member 52 intersects the discontinuous portion D in the axial direction. A disc roll for wire rod rolling comprising a sieve (B). delete In the disk roll for rolling wire rod formed with one or more rolling dies along the circumferential direction of the outer circumferential surface, An outer roll member 51 having an indentation 51A protruding from an inner circumferential surface thereof and having a through hole H3 formed in an axial direction in a central portion thereof; The inner surface of the outer roll member 51 is cast so that the outer surface is in close contact with the recess 51A, the inner roll member formed in the center shaft hole (H1) having the same center as the through hole (H3) 52; Including, The recess 51A is annular, and the recess 51A is formed with a hole-shaped discontinuity D penetrating the recess 51A in the axial direction, and the outer surface of the inner roll member 52 is Wire rod rolling disc roll, characterized in that the locking body (B) for traversing the discontinuous portion (D) in the axial direction. The disk roll for wire rod rolling according to claim 1, wherein the recess 51A is shorter than the inner circumference of the outer circumferential surface of the outer roll member 51, and protrudes at least one.

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