JPS6087908A - Roll for rolling mill - Google Patents

Abstract

PURPOSE:To change the body length of a roll in conformity with the width of a plate by forming the body end of the roll into a tapered shape, fitting a tapered sleeve onto the roll and providing a liquid pressure chamber to the inside circumference of the tapered part of the sleeve. CONSTITUTION:When a pressure oil is supplied from an oil path 16 into an oil chamber 14, a tapered sleeve 6 moves to a neck part 2 side and is held loosely fitted to a tapered part 3. The range where rolling down force is transmitted is only the body part 1 of the roll. On the other hand, when the pressure oil is supplied from an oil path 15 to the inside of an oil chamber 13, the sleeve 6 slides to the part 1 side and is held engaged with the tapered part 3. Since the rolling down force can be transmitted by the sleeve 6 as well, the body part 1 is equivalent to the state that said part is apparently extended by the length of the upper tapered sleeve 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll for a rolling mill for properly rolling a rolled plate of any width.

The four-high rolling mill shown in Figure 1 is widely used at present, but the drawback of this four-high rolling mill is the rolling rolls (back rolls).
α) When rolling a rolled plate (d+) with a narrow width compared to the body length of 1 work roll (b)), the work roll H (b) is curved as shown by the chain double-dashed line (1) in Figure 1, and the plate crown is Therefore, in order to prevent such an increase in plate crown, the work roll is bent by applying a pending force in the separating direction to the shaft end of the work roll (b). > and the contact area A with the backing roll (α), which has a problem in that the effect is reduced.

Several improvements have been made to eliminate these drawbacks, and one of the simple improvements is as shown in Figure 2, a large chamfer (C) f is provided at both ends of the backing roll (α). There is a method in which the roller b) and the backing roll (α) do not come into contact with each other at both ends. However, although this method is good for narrow plates, it has the disadvantage that when the width of the plate increases, both ends of the work roll (b) escape and the edges of the width of the plate become thicker, resulting in a negative crown.

The present invention aims to eliminate all of the above-mentioned drawbacks,
The body end continuous with the roll body is tapered, and a removable tapered sleeve is fitted to the body end, and the tapered sleeve is moved in the axial direction to be loosely connected to the body end. This relates to a roll for a rolling mill that can be engaged and can change the length of the roll body that can transmit rolling force, and can also change the roll profile by changing the engagement depth and the inflation pressure of the tapered sleeve. be.

The present invention will be described in detail below based on one drawing.

As shown in Figure 3, the roll body (1) and neck part (2)
A tapered part (with a smaller diameter than the roll body (1)
3), a stepped portion (4), and a parallel portion (5) are successively arranged, and a taper sleeve (6) that can be engaged with the tapered portion (3) is attached to the entire tapered portion (3), and the tapered sleeve ( A cylinder part (7) that can slide with the ring piston (2) described later is provided at the end of the neck part (2) of 6), and an annular piston part (8) that protrudes toward the center is provided at the inner diameter part. Provided so as to be in sliding contact with the parallel part of the roll.

A locking groove (9) is fully carved in the middle part of the parallel part (5), and a locking ring 00 having a multi-segment structure with screws on the outer periphery is fitted into the locking groove (9), while the parallel part (5) The locking ring 00 is located at the position of the locking groove (9) on the side of the Shinetsu part (2).
A ring piston (2) having a piston part (12 cL) is fitted and fixed with a pin αη, and
By fitting the piston part (12a,) to the inner wall of the cylinder part (7) of the tapered sleeve (6) in an oil-tight and slidable manner, the annular piston part (8) and the ring piston (
An oil chamber α3 for pushing the tapered sleeve (6) is formed in the space surrounded by the piston part (12α) of the tapered sleeve (6), and a taper sleeve (12α) is formed in the space surrounded by the annular piston part (8) and the stepped part (4). A return oil chamber (6) is formed, and an oil chamber is formed in the middle of the inner taper surface of the tapered sleeve (6), which is even with the outer peripheral surface.
A recess is provided to form a thick wall part, and the recess is used as an expansion oil chamber α of the sleeve (6), and each oil chamber α [phase] α→αη is provided with a roll The oil passage α0αU81 introduced into the shaft is opened.

Also, at appropriate locations on the outer periphery of the ring piston @.

A guide member α having a concave groove carved along the axial direction is provided, and a sleeve is provided along the guide member α.
6) The protrusion eA fixed to the end of the cylinder part (7) is fitted so that it can mesh and slide.

In Figure 1, 2υ indicates an oil seal.Next, the operation of the rolling mill roll configured as described above will be explained.

Now, if pressure oil is supplied from oil passage O0 to oil chamber aIO.

The tapered sleeve (6) is attached to the neck part (2) with the projection @ guided by the guide part vr on the ring piston (6) side.
Move to the side. At this time, the outer surface of the tapered part (3) is the neck part (
2) Since the diameter becomes smaller toward the side, the tapered sleeve (6) is in a loose state with respect to the tapered portion (3).

As a result, the area where the rolling blade is transmitted is the roll body (1).
Only.

On the other hand, when pressure oil is supplied into the oil chamber α along the oil passage α, the taper sleeve (6) slides toward the roll body (1) and comes into engagement with the taper part (3). At this time, pressure oil is supplied into the oil chamber θη through the oil passage 08), and the taper sleeve (6)
In Figure 3, the roll body (1
) or further expanded as shown by the dashed line.

When the taper sleeve (6) is engaged with the entire taper part (3), the tapered sleeve (6) can also transmit the rolling blade.
The roll body (1) is apparently extended by the length of the tapered sleeve (6). In addition, if there is no oil chamber αη on the inner surface of the tapered sleeve (6), the neck portion (2) is
The wall thickness gradually increases towards the side edges, so
If the tapered sleeve (6) is simply fully engaged, the side end of the roll body (1) will expand more than the side of the neck (2). The state indicated by the chain line cannot be obtained. Therefore, the presence of an oil chamber αη is required.

In the above, by adjusting the hydraulic pressure applied to the oil chamber α, the engagement depth of the taper sleeve (6) can be completely changed, and when the engagement depth changes, the taper sleeve (6) is adjusted by a wedge action commensurate with the engagement depth. ) expands and contracts, and the outer diameter of the tapered sleeve (6) changes by further adjusting the oil pressure applied to the oil chamber α force. Therefore, it is possible to change the outer diameter of the tapered sleeve (6) from a state smaller than the outer diameter of the roll body (1) to a state larger than the outer diameter of the roll body (1) at any engagement depth. The profile created by the expansion and contraction of the Taber sleeve (6) on the roll is applied to the work roll and used to control the shape of the rolled plate.

In addition, in a rolling mill that requires an intermediate roll 07) as shown in FIG. (6) can also be inflated to achieve the effect of 5-work roll bending. Figure 6 shows another embodiment, in which the annular piston part (8) and the oil When the tapered sleeve (6) is loosely mated with the structure without the chamber α4), the seal (2]) (2) provided on the tapered sleeve (6) is used.
1) Neck part (2) using the ring area formed between
) side, and compared to the embodiment shown in FIG. 3, the oil chamber 071 can be made longer, so there is an advantage that the above-mentioned Chiba League expansion range can be expanded.

Furthermore, FIG. 7 also shows another embodiment, in which a plurality of tapered sleeves (6) are used in the embodiment shown in FIG. 6, and compared to FIG. 6 and FIG. This has the advantage that even more fine-grained roll profile control is possible according to the width.

Next, a case will be described in which the rolling mill roll described above in FIG. 4 is installed as a backing roll of a four-high rolling mill.

Furthermore, what is shown in Fig. 4 is the upper retaining roll (26) and the lower retaining roll c! 6) The length of the tapered sleeve (6) (6) can be changed to diversify the shape control ability of the rolling mill.

In the figure (221 (24 are upper and lower work rolls, respectively, (to) is a rolling plate.

(F) indicates rolling reaction force, and (C) indicates pending force.

Narrow width rolling plate (231f: When rolling, move the tapered sleeve (6) (6) '!z to the end of the roll to make it loose. In this state, taper sleeve (6) (6)
Since the part cannot transmit the reduction blade, the work roll (221(
221 is not curved as shown in FIG.
Taper sleeve (6) when applying pending force @
Since the part (6) does not interfere, bending can be controlled effectively.

When rolling a wide rolled plate (231), apply a predetermined pushing force to the 6-tapered sleeve (6) (6) to bring it into a fully engaged state, and also as shown by the two-dot chain line in Figure 6. If it is inflated as shown, the torso section will be extended by the length of the tapered sleeve (G) ((i),
No negative crown occurs. Furthermore, if the tapered sleeve (G) (G)' is expanded so as to partially bulge as shown by the dashed line in FIG. 6, the rolled plate (23)
This is advantageous for shape control when the waveform has a complex wave including a quarter buckle or the like.

FIG. 8 shows a case in which a plurality of tapered sleeves are used in the embodiment shown in FIG. 4, which enables more fine control of the shape.

1. Shape control by the roll for a rolling mill of the present invention is not limited to the above-mentioned embodiments; the pushing force and expansion force of the tapered sleeve ((i) (0) are appropriately controlled according to the shape of the roll body ( 1) By changing the taper sleep diameter with respect to the outer diameter, a wide range of shape control is possible.
That is, changing the diameter of both ends of the backing roll (2G) (26) means that the profile of the backing roll (2G) (26) is applied to the work roll (2a tzb) and the work roll (22 (221) is bent. The same effect as control can be obtained.

Therefore, it is possible to control the shape only with the backing roll (261 (2i), and if the bending control of the work roll is added, the shape control ability will be significantly increased.

Furthermore, in the example shown in Fig. 4, the tapered sleeve (6)
Since the lengths of (6) are different, it is possible to roll rolled plates of various widths, and the bending curves of the upper and lower work rolls (22) can be changed, allowing for shape control and diversification of layers. .

Further, the rolling mill rolls of the present invention do not necessarily need to be used in sets of upper and lower parts, and only one roll may be used as required, as shown in Fig. 5 (a) fO) H. As such, it can be used as a roll (indicated by a hatch) other than the work roll of a 5-high or 6-high rolling mill, and it goes without saying that various changes can be made without departing from the gist of the thin ice invention. .

According to the present invention as explained above.

(1) The length of the roll body used for rolling force transmission can be changed in accordance with the sheet width.

(11) The diameter of both ends of the roll can be changed,
The profile of the roll can be changed (11D) Since the load is transmitted through metal contact on all roll surfaces, the change in the profile of the roll can be directly transmitted to the work roll or intermediate roll.

Also, if such a roll is attached to a rolling mill.

0ψ Rolled plates of various widths can be rolled without changing the work rolls, and the operating rate of the rolling mill is greatly improved.

(v) The shape control effect of work roll bending can be maximized regardless of the width of the rolled plate.

M It is possible to control the shape using only the backup roll, and if you add 5 work roll bending, the shape control ability increases dramatically.

It can produce excellent effects such as

[Brief explanation of the drawing]

1 and 2 are schematic explanatory diagrams of a conventional rolling mill, FIG. 6 is a schematic diagram of a rolling mill showing a partial explanation of the roll for a rolling mill of the present invention, and FIGS. 6 and 7 are partial explanatory views showing other embodiments of the rolling mill roll of the present invention, and FIG. 8 shows the rolling mill roll shown in FIG. 7. A schematic diagram of the installed rolling mill is shown. (1) is the roll body, (3) Fi taper part, (6) is the taper sleep, (7) is a part of the cylinder, (8) is the annular piston part, (13α4) α force is the oil chamber, αυθQ (torque ) indicates an oil path. Patent applicant Ishikawajima-Harima Heavy Industries Co., Ltd. Patent applicant Sumitomo Metal Industries Co., Ltd. Patent applicant agent

Claims (1)

[Claims] Roll Q for a rolling mill, characterized in that a tapered part is provided at the end of the roll body, a removable tapered sleeve is fitted into the tapered part, and a hydraulic chamber is provided on the inner periphery of the tapered part of the tapered sleeve.