JPS633690Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an assembly type sleeve roll used as a roll for rolling wire rods, metal plates, etc.

The sleeve roll used as a rolling roll is
It is desirable to form the roll surface with a harder material to increase the rolling speed and extend the life of the roll.

Although cemented carbide is an excellent hard material, this cemented carbide is expensive and brittle, so it is not preferable to integrally form the entire roll with cemented carbide.

For this reason, assembly-type sleeve rolls are generally used, in which the roll body is made of steel or the like, and a sleeve made of cemented carbide is fixed to the roll body by mechanical means such as fitting. It's becoming like that.

Conventionally, various structures have been proposed for assembly-type sleeve rolls, including a screw tightening type, a type that combines screw tightening and fitting of a tapered surface, and a type that uses the pressing elasticity of an elastic body. Although it may seem obvious, an example of the tightening type using screws is shown in Figure 1.
A cemented carbide sleeve 2 formed with one or more holes 1 is fitted onto the roll body 3, and fasteners 4 are attached to the roll body 3 on both sides of the sleeve 2 by screws or other fittings. The sleeve 2 is fixed to the roll body 3 to a sufficient extent to transmit the rolling torque necessary during rolling, and a fit ring 13 is fitted onto the outside of the fastener 4 into the roll body 3.

However, there are several problems with prefabricated sleeve rolls that must be resolved.

One of them is the issue of the mounting strength of the sleeve to the roll body. If the mounting strength is not strong, when a large rolling load is applied, the sleeve will move in the radial direction relative to the roll body, causing eccentricity of the sleeve. This not only causes wear and tear on the fitting portion, but also creates a gap on the fitting surface of the sleeve roll body, making the sleeve extremely susceptible to cracking under rolling loads.

Another problem is ease of assembly and disassembly of the sleeve.

In other words, the sleeve rolls that have been commonly used in the past are subject to not only the manufacturing accuracy of the sleeve roll body and fasteners, which are the basic components of the roll, but also the technology used to assemble these members and the formation of the sleeve roll. Since a very high degree of accuracy is required after the product is assembled, once the manufacturer has assembled the sleeve, it is not necessary or necessary to remove the sleeve unless a problem occurs during use. Ta.

Such sleeve rolls are not necessarily disadvantageous in terms of roll operation when producing small quantities of products in small quantities, but when producing small quantities of products of various sizes, sleeve rolls are not necessarily disadvantageous. The required amount becomes extremely large, which not only complicates roll operation but also requires a large initial investment, and the effectiveness of sleeve rolls is not demonstrated.

For such low-volume production of various sizes, a method is adopted in which two or more types of grooves are machined on the same sleeve and each groove is used to roll different product sizes. If the amount of rolling for each size is not balanced, the amount of roll wear per unit amount of rolling will drop significantly, which is undesirable and is therefore not normally carried out.

For these reasons, there is a strong demand for a sleeve roll that can be easily disassembled and assembled by the user.

This idea was made in view of the above points, and it is a sleeve roll that provides a high fixation force for the sleeve, reduces the occurrence of radial cracks and vertical cracks in the sleeve, and is easy to disassemble and assemble. The purpose is to provide

An embodiment of this invention will be described below based on FIG. 2. As shown in the figure, the sleeve roll includes a roll body 3, a sleeve 2 made of cemented carbide having one or more holes, an outer nut 6, and a space between the outer nut and the sleeve or between the sleeve and the roll body 3. one or more elastic bodies 11, 12 incorporated between the side surface 17 of the flange portion 18, and a hydraulic mechanism 19 incorporated between the outer nut 6 and the sleeve 2 to compress the elastic bodies. It is made up of.

Although the sleeve 2 is shown equipped with spacer rings 4 on both sides, this can be omitted.

In the illustrated example, two elastic bodies 11 and 12 are incorporated between the spacer ring 4 and the flange portion 18, but they may be incorporated between a hydraulic mechanism 19 and the spacer ring 4, which will be described later, to form a hydraulic mechanism. The elastic body may be directly compressed in step 19, and the elastic body contracts when pressed in the axial direction, and this contraction accumulates repulsive elasticity. Although shown, coil springs or synthetic resin springs may also be used.

The hydraulic mechanism 19 is fitted between the outer nut and the sleeve 2.

The hydraulic mechanism 19 is composed of an inner nut 5 screwed onto the outside of the roll intermediate portion 20 and a sliding ring 9 fitted onto the inner nut 5. The sliding ring 9 is arranged on the inner periphery of the sleeve side. It has a ring-shaped protrusion 15,
A liquid press-in hole 16 is provided that opens from the outer periphery at the side surface of the protrusion 15 on the protrusion side of the inner nut 5.

As described above, the inner nut 5 has a protrusion 5' near its center and is in contact with the sliding ring 9 at its outer periphery.

The sliding ring 9 is fitted onto the inner nut 5 so as to be freely movable in the axial direction, and one or more slide rings are connected to the sleeve-side side surface of the sliding ring 9 and the sleeve-side side surface of the inner nut 5. keys 10 are provided. When hydraulic pressure is supplied to the hydraulic mechanism through the liquid injection hole 16, the sliding ring 9 moves toward the sleeve 2 and compresses the elastic body in the axial direction either directly or via the spacer ring 4.

In response to the rotation of the sliding ring 9, the inner nut 5
are synchronously rotated by the key 10, and the hydraulic mechanism 9 can be easily screwed onto or removed from the roll body 3. The key functions to transmit the rotational torque of the sliding ring to the inner nut.

The sliding ring 9 moves toward the sleeve 2 by the above hydraulic pressure supply, and compresses the elastic bodies 11 and 12 in the axial direction. The elastic body accumulates rebound resilience that causes the axial dimension to shrink and return to its natural state.

The outer nut 6 is screwed in by the amount that the sliding ring 9 has moved, and the supply of hydraulic pressure is released with the sliding ring being clamped by the outer nut 6 and the sleeve 2.

Due to the rebound resilience of the compressed elastic bodies 11 and 12, the sleeve 2 is pressed against the sliding ring 9, and the sleeve 2 is fixed to the roll body 3 by the side pressure generated on both sides of the sleeve 2.

Conversely, when removing the sleeve 2, the hydraulic mechanism 19
Applying hydraulic pressure to the elastic bodies 11 and 12 and releasing the lateral pressure between the outer nut 6 and the sliding ring 9,
Remove.

Next, when the supply of hydraulic pressure is released, the sleeve 2 is pushed out in the direction of the outer nut 6 due to the repulsive force of the elastic body, and the sleeve 2 is pushed out in the direction of the outer nut 6, the hydraulic mechanism 19, the sleeve 2, the elastic bodies 11 and 12, and the main body flange portion 18. The lateral pressure that was acting in connection is released. Thereafter, when the sliding ring 9 is rotated, the inner nut is rotated via the key 10, and the outer nut 6 and the hydraulic mechanism 19 can be extracted from the roll book 9.

After this, the sleeve 2 can be removed.

In FIG. 2, which is the side of the present invention, the fillet ring 13 is fitted into the roll body 3 against the side of the outer nut, but the fillet ring 13 is either integrated with the outer nut 6 or attached with a bolt or the like. The screwed structure eliminates the need to attach and detach the fillet ring 13 when attaching and removing the sleeve 2 to the roll body 3, which is advantageous in assembling and disassembling the sleeve roll. .

As described above, according to this invention, the elastic body is compressed directly or through the sleeve by a hydraulic mechanism, and the sleeve is fixed to the roll body by the rebound resilience of this elastic body, so the sleeve is fixed. can be fixed by the lateral pressure generated by the pressing of the elastic body, and the fixing strength of the sleeve is greatly improved, there is no eccentricity of the sleeve, no wear and tear of the fitting part, and no cracking of the sleeve.

In addition, the hydraulic mechanism is integrated into a unit with an inner ring and an outer ring, and connection and release can be performed by aligning the notches and protrusions, which simplifies the fixing structure and makes it extremely easy to attach and remove the sleeve. This allows for different and more efficient roll production and roll use.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing a conventional sleeve roll, and FIG. 2 is a longitudinal sectional front view of an embodiment of the sleeve roll according to this invention. 1... Hole shape, 2... Sleeve, 3... Roll body, 4... Spacer ring, 5... Inner nut, 6
... Outer nut, 7, 8 ... O-ring, 9 ... Sliding ring, 10 ... Key, 11, 12 ... Elastic body,
13...Fittling, 15...Protrusion, 16
...Liquid press-in hole, 17...Flange side, 18...
...Flange part, 19...Hydraulic pressure mechanism.

Claims (1)

[Scope of utility model registration request] In an assembly-type sleeve roll in which a sleeve formed using a hard material is mechanically fixed to the roll body by the pressing force of an elastic body that accumulates repulsion elasticity by contraction in the axial direction, the roll body An inner nut having a protrusion near the center thereof and a sliding ring having an axially directed protrusion facing the sleeve side protrusion end surface of the inner nut are provided between the sleeve and the outer nut, and the sliding ring and the inner nut rotate. By configuring a hydraulic mechanism having one or more keys that are synchronously fixed with respect to A sleeve roll characterized in that the sleeve is fixed to the roll body.