JPH0242322Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rolling roll used when rolling a wire rod, a plate material, or the like.

Generally, in this type of rolling roll, various measures are taken to prevent the cemented carbide ring from slipping due to the large rolling torque that acts on the cemented carbide ring during rolling. has been done.

For example, on the outer periphery of a rolling roll shown in FIG. 1, that is, a shaft 1 having a flange portion 1a formed at one end, from the flange portion 1a side to the other end side,
In a rolling roll in which a spacer 2, a cemented carbide ring 3, and a spacer 4 are attached, and these are tightened and fixed by a tightening nut 5 screwed into a threaded portion 1b formed on the outer periphery of the shaft 1, As shown in FIG. 2, by forming the mutually opposing surfaces of the cemented carbide ring 3 and the spacer 4 into inclined surfaces inclined with respect to the axis O, slipping accidents of the cemented carbide ring 3 are prevented. That's what I do.
Note that the reference numeral 6 in FIG. 1 is a key for preventing rotation.

However, in the case of such a rolling roll, since one end surface of the cemented carbide ring 3 is an inclined surface, the center of gravity of the cemented carbide ring 3 is shifted from the axis O, and therefore the rolling Run-out occurs during processing, which not only may cause product quality defects, but also shorten the life of the rolling mill, bearings, etc. Furthermore, the component force along the slope of the tightening force of the tightening nut 5 causes the shaft 1 to There were problems such as the shaft 1 being bent, making it impossible to reuse it.

In this regard, in the rolling roll shown in Fig. 3,
As shown in FIGS. 4 and 5, one end surface of the cemented carbide ring 3 is a concave surface bent on a straight line perpendicular to the axis O, and the cemented carbide ring 3 is Since it is formed symmetrically, the center of gravity of the cemented carbide ring 3 does not deviate from the axis O, and moreover, the surface of the spacer 4 facing the cemented carbide ring 3 is evenly spaced over the entire concave surface. If it is a convex surface with good precision that makes contact,
The components of the tightening force applied by the tightening nut 5 along the two concave surfaces cancel each other out, thereby preventing the shaft 1 from being bent.

However, in the case of such a rolling roll, there is a risk that stress will be concentrated at the bent portion of the concave surface and the cemented carbide ring 3 will be damaged. This is extremely difficult in manufacturing, and this results in uneven contact between one concave surface and one convex surface, which may cause bending of the shaft, or may cause the concave and convex surfaces to contact each other. There was a risk that the cemented carbide ring 3 would be damaged due to excessive surface pressure acting on the contact portion. On the other hand, manufacturing the concave and convex surfaces with high accuracy in order to eliminate such problems requires a large amount of manufacturing cost, which raises the problem of increasing the cost of the rolling roll.

There is also a rolling roll that has a convex surface on the cemented carbide ring and a concave surface on the spacer to prevent breakage of the cemented carbide ring 3 due to stress concentration. However, the difficulty in bringing the concave surface and the convex surface into contact over the entirety and the problems associated therewith are similar to those of the conventional example.

This invention was made to solve the above problems, and can prevent run-out during rolling, bending of the shaft, and breakage or breakage of the cemented carbide ring, and is easy to manufacture. The purpose is to provide a rolling roll that can

The feature of this invention is that inclined surfaces are formed on both end surfaces of the cemented carbide ring, which are parallel to each other and inclined with respect to the axis of the shaft.

An embodiment of this invention will be described below with reference to FIGS. 6 and 7. FIG. 6 is a partially omitted half-sectional view of a rolling roll according to this invention, and FIG. 7 is a cross-sectional view showing a cemented carbide ring. Note that the same parts as in the conventional example described above are given the same reference numerals, and the explanation thereof will be omitted. In the rolling roll of this embodiment, both end surfaces of the cemented carbide ring 13 are parallel to each other and are inclined surfaces having an inclination angle α with respect to the axis O of the shaft 1. Along with this,
The end surfaces of the spacers 12 and 14 facing the cemented carbide ring 13 are also inclined surfaces having an inclination angle α with respect to the axis O. Regarding the inclination angle α, if it is too small, the cemented carbide ring 1 required to roll a plate of a certain width
3 must be made wide; on the other hand, if it is made too large, the anti-rotation effect of the spacers 12 and 14 on the cemented carbide ring 13 will be weakened. Therefore, it is desirable that the inclination angle α is 75° to 89°59′30″.

However, when rolling is performed using such rolling rolls, since both end surfaces of the cemented carbide ring 13 are parallel to each other, the width thereof becomes uniform, and therefore the cemented carbide ring 13 has a uniform width. The center of gravity of the shaft 13 does not shift from the axis O, and the shaft 1 can be prevented from swinging. Also, tighten the tightening nut 5.
Since the directions of the components of the tightening force along both inclined surfaces are opposite to each other, they cancel each other out, and it is therefore possible to prevent the shaft 1 from bending. Further, a cemented carbide ring 13 and spacers 12,1
4 are just flat surfaces, stress is not concentrated on one part, and it is possible to prevent the cemented carbide ring 13 from breaking. It can be machined with high accuracy, and as a result, each opposing surface can be brought into contact evenly over the entire surface, so that the surface pressure on some parts is not excessive, and the cemented carbide ring 1
3 can be prevented from being lost.

In the above embodiment, one cemented carbide ring 13 is attached to the shaft 1, but the present invention is not limited to this, and a plurality of rings may be attached. When a plurality of spacers are installed, both end surfaces of the spacer existing between the cemented carbide rings are sloped surfaces parallel to each other.

Further, in the above embodiment, the plate material is rolled and pressurized, but the invention is not limited to this, and a wire or bar material may be rolled by forming a caliber on the outer periphery of the cemented carbide ring 13. You can do it like this.

Further, in the embodiment described above, the cemented carbide ring 3 is tightened by a screw mechanism consisting of a threaded portion 1b formed on the outer periphery of the shaft 1 and a tightening nut 5 screwed into the threaded portion 1b. ,
The tightening is not limited to this, but may be tightened by a hydraulic mechanism such as a so-called hydraulic nut. In this case, there is no need to rotate the tightening nut 5, so the spacer 14 may be omitted. Regarding the omission of the spacer, if an inclined surface is formed on the end face of the flange portion 1a of the shaft 1, the spacer 12 can also be omitted.

As explained above, according to the rolling roll of this invention, since inclined surfaces are formed on both end surfaces of the cemented carbide ring and are parallel to each other and inclined with respect to the axis of the shaft, the following results can be obtained. Effects can be obtained.

(1) It is possible to prevent the shaft from swinging during rolling, thereby enabling high-speed rolling.

(2) It is possible to prevent the shaft from bending and extend its life.

(3) Stress is not concentrated on a part of the cemented carbide ring, and breakage can be prevented.

(4) High-precision cemented carbide rings can be manufactured easily.

(5) It is possible to prevent excessive surface pressure from acting on the end face of the cemented carbide ring, thereby preventing its breakage.

(6) (2), (3) and (5) enable high torque rolling.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an example of a conventional rolling roll, with some parts omitted, Fig. 2 is a vertical sectional view showing the cemented carbide ring, and Fig. 3 is a partially cutaway front view of an example of a conventional rolling roll. A partially cutaway front view showing another example with some parts omitted, FIG. 4 is a longitudinal sectional view showing the cemented carbide ring, FIG. 5 is a view taken in the direction of the arrow in FIG. 4, and FIG. FIG. 7 is a partially omitted half-sectional view of an embodiment of this invention, and FIG. 7 is a longitudinal sectional view of the cemented carbide ring. 1...Shaft, 1b...Threaded portion, 3...Cemented carbide ring, 4...Spacer, 5...Tightening nut, O...
Axial center.

Claims (1)

[Claims for Utility Model Registration] 1. A rolling roll comprising a cemented carbide ring fixed to the outer periphery of a shaft with its end face tightened by a tightening mechanism provided on the shaft. 1. A rolling roll characterized in that sloped surfaces parallel to each other and inclined with respect to the axis of the shaft are formed on both end surfaces of a manufactured ring. 2 The tightening mechanism is interposed between a threaded portion formed on the outer periphery of the shaft, a tightening nut screwed into the threaded portion, and the tightening nut and the cemented carbide ring, and has one end surface. is formed to allow rotation of the tightening nut, and a spacer having an inclined surface corresponding to the inclined surface formed on the other end surface, according to claim 1 of the utility model registration claim. The mentioned rolling roll.