JPS58224057A - Roll for transfer of hot ingot or the like - Google Patents

Abstract

PURPOSE:To obtain a roll which is highly resistant to heat crack and abrasion and can transfer a hot ingot such as cast ingot or the like without supercooling, by fitting and detaining plural ceramic rings by means of plural support rings which are fitted to the cylindrical part of the roll. CONSTITUTION:The cylindrical part 1 of a roll body 5 of which both ends are formed into journals 6 is smaller in diameter than the diameter of a prescribed roll, and has step parts 7 for preventing the pull-out of support rings 2 and external screw parts 8 in one end part and the other end part. The ring 2 which is freely fittable onto the part 1 is fitted onto the part 1, and a ceramic ring 10 is fitted to the notched stepped part 9 of said ring so as to fit and detain one end part of the inside circumference by means of ceramic paper 15. The other end part of said ring 10 is similarly fitted and detained in the one notched stepped part 9 of a support ring 3. Thereafter, the rings 10 and the rings 3 are fitted similarly as shown in the figure, then a support ring 4 is fitted, a belleville spring 14, and a retaining ring 11 are fitted, a nut 17 is tightened and a stopper screw 18 is screwed down, whereby the assembly is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll for transferring hot flakes such as hot continuously cast slabs drawn from molds.

For example, in continuous casting equipment, guide rolls that transport high-temperature continuous casting slabs pulled out of molds have conventionally
Rolls made of side-heated steel such as chromium molybdenum steel or high chromium steel with cooling water passages provided inside, or cast steel rolls with heat-resistant steel shrink-fitted on the outer periphery are used.

However, such conventional guide rolls have a diameter of 700~
1. Thermal stress is generated by contact between slabs at a high temperature of 200°C, and repeated contact causes cracks, and corrosion wear, high-temperature oxidation wear, and mechanical wear on the roll surface progress significantly, resulting in a decrease in roll diameter. There is a problem with the thinness of the lifespan, which has a negative effect on the quality of the slab. In addition, due to the recent trend of high-temperature slab casting, water-cooled rolls also forcefully cool the slab, which not only causes energy loss but also causes surface cracks in the slab.

From the above-mentioned viewpoints, the present invention provides a roll for transferring hot flakes that has excellent surface 1 thermal cracking resistance and surface 1 abrasion resistance, has a long life, and is capable of transferring slabs without overcooling them. A roll main body having a roll body having a diameter one smaller than a predetermined roll diameter and into which a ring material can be fitted freely, and a roll body which can be freely fitted to the roll body and has a ring concentrically parallel to the axis on its outer edge. a plurality of support rings each having a circumferential surface and a notch step having an inclined surface crossing the circumferential surface at an acute angle; a ceramic ring having an outer diameter larger than the outer diameter of the support ring, the ceramic ring having an outer diameter larger than the outer diameter of the support ring, and a ceramic ring having an outer diameter larger than the outer diameter of the support ring, the outer edge of which is formed with a beveled surface in surface contact with the slope of the notch step; It is characterized in that it consists of a ceramic paper interposed between the circumferential surface of the roll body and the ceramic ring, and an elastic member that imparts a fitting and holding force to the support ring and the ceramic ring with respect to the roll body. .

Next, the present invention will be described by way of examples with reference to the drawings.

FIG. 1 shows an embodiment of the invention in a partially cutaway front view. As shown in the drawing, the roll body 1 has a diameter smaller than a predetermined roll diameter, and the support rings 2, 3.4
The roll main body 5 is formed with journals 6.6 at both ends thereof, and a retaining step 7 of the support ring 2 is formed at one end of the roll body 1 at the other end. The department includes
A male threaded portion 8 is formed.

The support rings 2, 3.4 each have an inner diameter slightly larger than the outer diameter of the roll body 1, and can be slidably fitted into the roll body 1. The support rings 2 and 4 disposed at the ends of the roll body 1 have a cutout stepped portion 9 on the outer edge that becomes inside when fitted to the roll body 1, and a cutout step portion 9 is disposed approximately in the middle of the roll body. The support ring 3 has cutout steps 9 formed on its outer edges on both sides.

As shown in the enlarged longitudinal cross-sectional view in FIG.
It consists of an inclined surface 9b intersecting at an acute angle.

The end portion of the inner circumferential surface of the ceramic ring 10 is fitted into the notch step portion 9 and is latched thereto. The ceramic ring 10 has an outer diameter slightly larger than the outer diameter of the support rings 2, 3.4, and has an inclined surface 9b formed at each notch step of the support rings 2, 3.4 on its outer edge. A beveled surface 10a is formed which makes surface contact with the surface.

A presser ring 11 is fitted into the support ring 4 disposed at one end of the roll body 1 on the side facing the externally threaded portion 8 when the roll body 1 is fitted. Headless screws 12 parallel to the axis are screwed into the support ring 4 at equiangular division positions in the circumferential direction, and each headless screw 12 is inserted into a hole 13 drilled in the retaining ring 11 in the axial direction. They are fitted so that they can slide freely.

The headless screw 12 supports a disc spring 14 interposed between the support ring 4 and the presser ring 11.

Further, a ceramic paper 15 for buffering purposes is interposed between the cutout step portion 9 and the ceramic ring 1o.

16 is a bearing supported by a machine frame (not shown);
7 is a nut screwed onto the male threaded portion 8, and the nut 17 is a member that receives the reaction force of the presser ring 11;
It is fixed by screwing the locking screw 18 between it and the male threaded portion 8.

The roll of the present invention having the above-mentioned configuration has a roll main body 5.
First, the support ring 2 is fitted onto the roll body 1, and then one end of the inner peripheral surface is fitted and latched into the cutout step 9 of the support ring 2 via the ceramic paper 15, thereby attaching the ceramic ring 1o. Fit it.

Next, the support ring 3 is fitted onto the roll body 1, and the inner circumferential surface of the ceramic ring 10, which is fitted and latched to the notch step 9 of the support ring 2, is inserted into the notch step 9 of the support ring 3. The other end is fitted and latched with a ceramic paper 15 interposed therebetween.

After fitting the ceramic ring 10, the support ring 3, the ceramic ring 10, and the support ring 3 in the same manner, the support ring 4
are fitted into the roll body 1, and the inner peripheral surface ends of the ceramic rings 10 are fitted and latched to the cutout steps 9 through the ceramic paper 15, and then the disc spring 14 and the presser ring 11 are fitted. Insert the screws in this order, tighten the nut 17, and screw in the set screw 18 to complete the assembly.

In the roll of the present invention assembled in this manner, the outer diameter of each ceramic ring 10 has a predetermined roll diameter. Each ceramic ring 10 is provided with a fit-holding force against the sealer body by the elastic pressing force of the disc spring 14, and the difference in thermal expansion between the ceramic ring and the metal phase is absorbed. Further, since each ceramic ring 10 has its beveled surface 10a in surface contact with the sloped surface 9b of the cut step 9, thermal expansion of the Ronil main body 5, the support rings 2, 3.4, and the ceramic ring 10 Even if the ratio is different, each member can expand and contract freely, and thermal expansion
The tension force and mechanical force mainly act on the -ky-i71 material as a compressive load and do not destroy them.

Furthermore, even if a mechanical shock is applied to the ceramic ring 10, it can be alleviated by the ceramic paper 15 interposed between the cutout step 9 and the ceramic ring 10. Note that even if any of the ceramic rings 10 is damaged, only the damaged ceramic ring needs to be replaced.

As is clear from the above explanation, the role of this invention is
Since it is a non-water-cooled roll, hot pieces such as slabs that come into contact with the roll are not overcooled, and it also has excellent heat cracking resistance and wear resistance, and can extend the life of the roll. In addition, since multiple ceramic rings are supported by alternating arrangement with multiple support rings, roll manufacturing costs are reduced, and partial repairs are possible, reducing maintenance costs. Many excellent industrial effects are brought about, such as enabling high-temperature holding and transfer, making it easier to process the slab in a high-temperature state in the next process.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the roll of this invention, with some parts omitted.
Fig. 2 is an enlarged longitudinal sectional front view of the fitting portion between the support ring and the ceramic ring.・Support ring, 5... Roll body, 6... Journal, 7
...Removal-preventing stepped part, 8...Male thread part, 9...
Notch step, 9a... Circumferential surface, 9b... Inclination allowance 1, 10... Ceramic ring, 10a... Extra 1
Sharpening, 11... Presser ring, 12... Headless screw, 13... Hole, 14... Belleville spring,
15...Ceramic paper;, 16...Bearing, 17...Nut, 18...IE female thread. Applicant: Nippon Steel Tube Co., Ltd. Applicant: Asahi Glass Co., Ltd. Agent: Keitabe Tsutsumi and 1 other person Proposed amendment (spontaneous), January 27, 1980 Kazuo Wakasugi, Commissioner of the Patent Office 2, Name of the invention Transfer roll 3, relationship with the case of the person making the amendment Patent applicant address: 1-2 Marunouchi-chome, Chiyoda-ku, Tokyo s<Ai
p) Representative of Nippon Kokan Co., Ltd. Minoru Kaneo (1 person) Voluntary 6, subject to amendment

Claims (1)

[Claims] hj A roll main body having a roll body having a diameter smaller than a constant roll diameter and capable of freely fitting a ring, and a circumference concentrically parallel to the axis on its outer edge, which can be freely fitted to the roll body. a plurality of support rings each having a notched step portion having a surface and an inclined surface intersecting the circumferential surface at an acute angle; and an end portion of the inner peripheral surface is fitted and latched to the notched step portion of the adjacent support ring;
a ceramic ring having an outer diameter larger than the outer diameter of the support ring, the outer edge of which is formed with a beveled surface that makes surface contact with the sloped surface of the notch step; and a circle at the notch step of the support ring. A method for transferring hot flakes, characterized by comprising a ceramic paper interposed between the peripheral surface and the ceramic ring, and an elastic member that imparts a fitting and holding force to the supporting ring, the ceramic ring, and the ring to the roll body. roll.