JPS586565Y2 - double check device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a double chock device for a rolling mill.

Various roll bending systems have been developed in order to improve the quality of rolled plates and reduce rolling costs in rolling mills.

One method, the double chock bending method, is more than twice as effective as the normal single chock method, and is also cheaper to construct than other methods and can be easily applied to existing rolling mills. There are benefits.

However, on the other hand, since multiple bearings and chocks are attached to the left and right sides of one work roll, handling becomes complicated.

Figure 1 shows a conventional system in which two bearings and their chocks are each independently fixed on one side of a work roll.
is fixed by an adjusting threaded sleeve f, a nand g, and a splitting e, an inner chock j is fixed to the ring of an inner bearing i by a retainer l, and similarly an outer bearing h is fixed to an adjusting threaded sleeve d. oak) C and two-piece M2
is fixed to the work roll a.

Note that in the figure, the outer chock is an outer chock, and m is an oil seal.

In such a conventional method, in order to receive thrust force,
It is necessary to bring the inner rings of the inner bearing i and the outer bearing h into contact with the stepped portion of the work roll shaft, which causes a problem in that the R of the stepped portion of the work roll shaft becomes small, which is disadvantageous in terms of strength.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks of the conventional means, and includes providing an inner chock through an inner bearing and an outer chock through an outer bearing at the shaft end of a work roll. A collar having a hollow hole with a diameter smaller than the inner diameter is provided on the inner diameter side of the inner ring of the inner bearing, and the collar is held between the step of the work roll shaft and the side end face of a spacer fitted into the shaft hole of the outer bearing. This is a characteristic feature.

Embodiments of the present invention will be described below with reference to the drawings.

An inner chock 2 and an outer chock 3 are fitted into the backing roll chock 1, and the inner chock 2 and outer chock 3 are formed so as to be able to slide in a direction perpendicular to the paper.

Furthermore, two protrusions 4 and 5 are attached to at least one side of the facing surfaces of the inner chock 2 and the outer chock 3, and the protrusions 4 and 5 allow the inner chock 2 and the outer chock 3 to rotate relative to each other. Do not engage.

An inner bearing 6 is fitted inside the inner chock 2, and an outer bearing 7 is fitted inside the outer chock 3. The side surfaces on the bearing side are held down by chock stepped sections.

The inner ring recess of the inner bearing 6 is different from the inner ring of a normal bearing, and protrudes toward the outer bearing T side.
A hollow hole 22 with an inner diameter smaller than the inner diameter of the inner ring is provided at the tip of the protrusion.
A collar 23 is integrally attached.

A spacer 8 whose one end is in contact with the side surface of the collar 23 of the inner ring of the inner bearing 6 is fitted into the shaft hole of the outer bearing 7, and a ring-shaped projection is provided in the middle of the spacer 8. .

The outer bearing side side surface of this protrusion presses the inner ring side surface of the outer bearing 7.

A shaft portion of a work roll 9 is fitted into the shaft hole of the inner bearing 6 and the hollow portion of the spacer 8, and a stepped portion A of the shaft portion of the work roll 9 is provided with a large radius.

Further, the stepped portion H also has a large radius, and a ring 20 for receiving the nutka is fitted between the collar 23 and the stepped portion B.

Furthermore, a ring 10 is fitted to a portion of the shaft portion of the work roll 9 that is further outside the outer end of the spacer 8 and is spaced apart from the end of the spacer 8 by an appropriate distance.

A thread is cut on the outer periphery of the ring 10, and a nut 11 for pressing the inner ring side surface of the outer bearing 7 is screwed into the thread.

A two-parting ring 12 connected in a POL-C-i manner is attached to the shaft groove of the work roll 9, and a rotation stopper 14 is fixed to the two-parting part 12 via a bolt 13.

Further, the rotation stopper 14 is connected to the NAND 1 via a bolt 15.
It is fixed to the side of 1.

On the outer periphery of the spacer 8 located between the inner bearing 6 and the outer bearing 7, a retainer 16 having a cross section with an appropriate gap is fitted concentrically to the spacer 8. The outer periphery of the flange is fixed to the side surface of the inner chock 2 with bolts.

In addition, an inner bearing 6 is attached to the flange portion of the retainer 16.
A protrusion projecting from the side is provided, and the protrusion supports the side surface of the inner bearing 60.

A retainer 17 that holds down the outer bearing 70 row wheel is attached to the side surface of the outer chock 3 facing the inner chock 2. The cylindrical portion of the retainer 170 extends toward the retainer 16, and the retainer 16 is held in place from the row side. encircling concentrically.

An oil seal 18 is fitted between the outer periphery of the retainer 16 and the inner periphery of the retainer 1T to prevent oil from leaking to the outside.

Note that 19 in the figure is an oil seal installed between the outer periphery of the nut 11 and the outer chock 3, and 21 is a rotation prevention key.

The rolling operation is carried out by driving a necessary pressure T device and a drive device for the work rolls 9 (not shown).

Stress is generated in the 9th axis of the work roll during operation, but
Since each of the stepped portions A and H is rounded, the degree of stress concentration in these portions is small and safe operation is possible.

Note that the embodiments of the present invention are not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention.

The tuple chock device of the present invention can support the Nuranutoka without having the inner ring directly contact the stepped part of the work roll shaft, so the stepped part R can be made large, and therefore stress concentration is reduced on the stepped part of the work roll shaft. This is advantageous in terms of strength.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional double chock device, FIG. 2 is an explanatory diagram of a double chock device of the present invention, and FIG. 3 is an enlarged view of the vicinity of the inner bearing of the device shown in FIG. 1 is a back roll chock, 2 is an inner chock, 3 is an outer chock, 4 and 5 are protrusions, 6 is an inner bearing, 7 is an outer bearing, 8 is a Nubesa, 9 is a work roll, 20 is a ring, 22 is a hollow hole, 23 is the spittle,
A and B indicate stepped portions.

Claims (1)

[Scope of utility model registration request] An inner chock is provided at the shaft end of the work roll via an inner bearing, and an outer chock is provided via an outer bearing, and a collar having a hollow hole with a diameter smaller than the inner diameter is provided on the inner diameter side of the inner ring of the inner bearing. A double chock device characterized in that the collar is held between the step of the work roll shaft and the side end face of a spacer fitted into the shaft hole of the outer bearing.