JPH02117707A - Rolling roll - Google Patents

Abstract

PURPOSE:To prevent thermal distortion of a roll shaft and generation of thermal stresses between the shaft and a ring by forming flowlines communicating with the shaft and its bearing mounting parts and flowing a fluid to them to perform temp. control. CONSTITUTION:A pair of communicating holes 10 are formed from an end of a roll shaft 1 in parallel with the axial line. To positively remove heat from bearings 5, the top of the holes 10 is communicated with fluid grooves 42 formed on a peripheral parts 41 of the shaft 1 facing to inner races 40 of the bearings 5 to form flowlines 43. The holes 10 are opened on the periphery of the shaft 1 and are connected with outside pipes by rotary joints 44. A fluid is flowed into the lines 43 to perform cooling and temp. control, and to prevent thermal distortion of the shaft, and also to prevent generation of thermal stresses between the shaft and ring and plays caused by increase of clearances at low temp. conditions, and the accuracy from degradation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rolling roll in which a ring with excellent wear resistance is fitted onto the outer periphery of a roll shaft.

[Conventional technology]

Conventionally, this type of rolling roll has a collar 2 and a ring 3 on the outer periphery of a roll shaft 1, as shown in FIG.
By alternately fitting the flange portion 1a of the roll shaft l and the nut 4, by screwing the nut 4.
It is known that the collar 2 and ring 3 are fixed between them.

In addition, in FIG. 6, reference numeral 5 indicates the roll shaft l.
A bearing 6 rotatably supports the roll shaft 1 to prevent water from entering the hair ring 5.
a labyrinth attached to the side (the labyrinth on the fixed side of the bearing 5 is not shown).

By the way, in the conventional rolling roll described above, no consideration was given to temperature control of the shaft 1, and the shaft 1 was simply cooled down naturally by heat transfer and radiation. On the other hand, the ring 3 during rolling was cooled by pouring a large amount of cooling water from outside. As a result, the roll shaft 1 is heated by the transfer of heat generated from the bearings of the rolling mill, and sometimes the temperature rises to more than that of the ring 3. This phenomenon becomes more noticeable when the ring is cooled from the outside.) , inner circumference of ring 3 and roll shaft l
Tightness occurs between the ring 3 and the ring 3, and a tensile force acts on the ring 3, that is, an internal pressure acts on the ring 3, and in some cases, the ring 3 is damaged (split).

Also, in winter, etc., ring 3 and roll shaft 1
When both are used from near 0℃, ring 3
Since the ring can be warmed up more quickly, an unnecessarily large clearance is generated between the ring and the roll shaft l, which causes deterioration of accuracy and slippage of the ring 3.

[Problem to be solved by the invention]

In this way, in the conventional rolling roll in which the ring 3 with excellent wear resistance is fitted onto the roll shaft 1, the wear resistance of the material and the mechanical strength of the shaft are made of different materials. However, because different materials are used in a mating manner, due to differences in thermal expansion coefficients (in general, it is difficult to use a ring with high wear resistance). (low coefficient of thermal expansion), thermal stress is generated between the roll shaft 1 and the ring 3, and under severe conditions, breakage and poor precision have occurred.

The present invention has been made in view of the above circumstances, and its purpose is to actively cool the roll shaft and smoothly control the temperature of the roll shaft. It is an object of the present invention to provide a rolling roll which can not only prevent distortion but also prevent ring breakage or deterioration of accuracy.

[Means to solve the problem]

In order to achieve the above object, a first aspect of the present invention is that the roll shaft is provided with a fluid conduit for temperature control.

In a second aspect of the present invention, the roll shaft is provided with a fluid conduit for temperature control that communicates with the bearing mounting portion of the roll shaft.

Furthermore, the roll shaft is provided with a rotary digont connected to the fluid conduit.

[Effect]

In the rolling roll of the present invention, thermal distortion of the roll shaft is prevented by flowing a temperature control fluid through a fluid conduit provided in the roll shaft. By circulating fluid through the bearing mounting H of the roll shaft, it is possible to remove the heat generated in the bearing part, which is the main cause of the rise in temperature of the roll shaft, and by applying pressure to the conduit, it is possible to The inner lace can be expanded and disassembled.

Furthermore, the supply of fluid to the conduit and the discharge of fluid from the conduit can be smoothly performed by the rotary joint.

〔Example〕

Hereinafter, the present invention will be explained in detail based on FIGS. 1 to 5.

FIG. 1 shows a first embodiment of the present invention. In this first embodiment, the same reference numerals are given to the parts having the same structure as those of the conventional example shown in FIG. 6, and the explanation thereof will be omitted. In Figure 1, one end (left end) is inside the roll shaft l.
A pair of communication holes 10 are formed parallel to the axis of the roll shaft l, and a communication hole 11 is formed in a plane perpendicular to the axis to communicate the ends of both communication holes 10 with each other. . Both openings of this communication hole II are each closed by a closing member 12,
The two communication holes 10 and the communication hole 11 constitute a conduit I3 for fluid (water or oil) for temperature control. Further, a rotary joint 14 is connected to one end of the roll shaft 1, and fluid is supplied from the outside to the pipe line 13 in the roll shaft 1 through the rotary joint 14.

Further, the bearing section will be described with reference to FIG. 2. Both ends of the roll shaft 1 are rotatably supported by a bearing holder 17 via a roller bearing 15 and an angular contact bearing 16, respectively. In addition, the labyrinth 6 on the roll shaft 1 side
In contrast, a labyrinth 18 is attached to the bearing holder 17.

In the roll configured as described above, the roll shaft 1 is provided with a fluid conduit 13 for temperature control, and the fluid is circulated through the conduit 13 via the rotary joint 14, thereby achieving It becomes possible to control the temperature of the roll shaft 1, prevent thermal distortion from occurring in the roll shaft 1, and suppress temperature changes due to the mutual difference between the inner diameter of the ring 3 and the outer diameter of the roll shaft 1. This prevents the generation of thermal stress between the roll shaft 1 and the ring 3 that causes breakage of the ring 3, or the rattling of the ring 3 and deterioration of accuracy due to the increased clearance between the roll shaft 1 and the ring 3 that occurs at low temperatures. can be prevented.

Further, FIG. 3 shows an example of a cantilever type rolling roll. In this figure, reference numeral 20 is a case, and an intermediate housing 21 is connected to the case 20 by bolts and nuts. A gap adjustment device 22 is provided inside the case 20 and the intermediate housing 2I.
An upper arm 23 and a lower arm 24 are provided via the upper arm 23 and the lower arm 24, and a roll shaft 27 is attached to these arms 23 and 24 via a bearing (oil film) 25 and an angular bearing 26, respectively.

A tapered sleeve 28 is fitted into a tapered portion 27H formed at one end (left end in FIG. 3) of the roll shaft 27, and a holder main body 29a and a side plate 29b are fitted around the outer periphery of the tapered sleeve 28. A ring 30 is attached via a holder 29 consisting of. A suppression mechanism 31 is provided at one end of each roll shaft 27 to press the Taber sleeve 28 and holder 29 to fix the ring 30. Further, inside each roll shaft 27, a pair of communication holes 32 are formed from the other end to the front side of the tapered portion 27a, parallel to the axis of the roll shaft 27, and in a plane perpendicular to the axis. , a communication hole 33 is formed that communicates the tips of both the communication holes 32 with each other. Both openings of the communication hole 33 are each closed by a closing member 34, and the two communication holes 32 and the communication hole 33 constitute a conduit 35 for fluid (water or oil) for temperature control. There is.

Furthermore, a rotary joint 36 is connected to the other end of the roll shaft 27, and fluid is supplied to the pipe line 35 from the outside via the rotary joint 36.

In the rolling roll configured as described above, the bearing 25 is the main cause of the temperature rise of the roll shaft 27.
．． By circulating fluid through the pipe line 35, the heat from the portion 26 can be smoothly removed, and the same effects as in the first embodiment described above can be achieved.

Furthermore, in FIGS. 4 and 5, in order to actively remove the heat from the bearing 5, which is the main cause of the temperature rise of the roll shaft 1, the tip of each circulation hole 10 is set up to the bearing 5, and These flow holes 10 communicate with fluid grooves 42 formed in the outer circumferential portion (bearing mounting portion) 41 of the roll shaft l facing the inner race 40 of the bearing 5 to form a conduit 43. In addition, in FIG. 5, on the left end side of the roll shaft l, there is a flow hole 1.
0 is opened at the outer peripheral part of the roll shaft 1, and an outer peripheral type rotary joint 44 is attached to this opening.

In the rolling roll configured as described above, the pipe line 4
3 can be shortened, making processing easier and reducing heat generation sources (
This heat could be removed near the bearing section), and the temperature distribution throughout the roll shaft 1 became uniform.

Furthermore, by closing one end of the conduit 43 and transmitting pressure from the other end to the inner surface of the inner race 40 using a high-pressure pump, the inner race 40 can be enlarged, making it easy to replace (remove) the inner race 40. can be done.

In the above embodiments, it is desirable to use roll cooling water as the temperature control fluid.

This simultaneously achieves the objective of eliminating the temperature difference between the roll shaft and the ring at low cost.

〔Effect of the invention〕

As explained above, claim 1 of the present invention is that the roll shaft is provided with a fluid conduit for temperature control, so that the roll shaft is actively cooled by flowing fluid through this conduit. This makes it possible to smoothly control the temperature of the roll shaft, thereby preventing thermal distortion of the roll shaft, and also preventing the occurrence of thermal stress between the roll shaft and the ring, which can cause breakage of the ring. Alternatively, it is possible to prevent ring rattling and deterioration of accuracy due to an increase in the clearance between the roll shaft and the ring that occurs at low temperatures.

In addition, by flowing fluid through the bearing mounting part of the roll shaft, it is possible to efficiently remove the heat generated in the bearing part, which is the main cause of the rise in temperature of the roll shaft, and the pipe line can be shortened, making processing easier. By applying pressure to the conduit, the inner race of the bearing expands and can be easily removed from the roll shaft. Furthermore, fluid can be smoothly supplied to the pipeline of the roll shaft by the rotary joint.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a sectional view, FIG. 2 is a detailed sectional view, and FIG. 3 is a sectional view showing a second embodiment of the invention. , FIG. 4 and FIG. 5 show a third embodiment of the present invention, in which FIG. 4 is a sectional view, FIG. 5 is a detailed sectional view, and FIG. 6 is a sectional view of a conventional rolling roll. 1...Roll shaft, 3...Link, 13...'t road, l 4--Rotary joint, 27...Roll shaft, 30...Ring , 35...Pipe line, 36...Rotary joint, 41...Bearing mounting part, 4
3... Conduit, 44... Rotary joint.

Claims (3)

[Claims] (1) A rolling roll comprising a ring with excellent wear resistance fitted onto the outer periphery of a roll shaft, characterized in that the roll shaft is provided with a fluid conduit for temperature control. (2) In a rolling roll in which a ring with excellent wear resistance is fitted onto the outer periphery of a roll shaft, the roll shaft is provided with a fluid conduit for temperature control that leads to the bearing mounting portion of the roll shaft. A rolling roll characterized by: (3) The rolling roll according to claim 1 or 2, characterized in that the roll shaft is provided with a rotary joint connected to a fluid conduit.