JPH07265919A - Pass line adjusting device - Google Patents

Abstract

PURPOSE:To provide a pass line adjusting device which can firmly lock the position of a roll at rolling with a simple constitution and is not likely to lower adjusting precision due to deformation, etc. CONSTITUTION:The device is provided with a wedge member 2, which is placed under both bearings of a lower roll set L, on the inclined face 8a of a housing 8 of mill M and has the inclined faces 6a, 7a facing to the inclined face 8a of the same direction/same horizontal angle, and a rod 3, in which its one end is pin-connected to the end part of wedge member 2. Further, the device is constituted of a hydraulic cylinder 4, in which its piston rod is connected to the other end of rod 3 and which moves the member 2 in horizontal direction, and a forced fitted type sleeve 5 to hold the wedge member 2 at any position, which is fitted to outside the rod 3 and is fixed to the hydraulic cylinder 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wedge type pass line adjusting device (hereinafter simply referred to as an adjusting device) for vertically moving a roll of a rolling mill or a set of a plurality of rolls in order to change the roll position by polishing the roll. Device).

[0002]

2. Description of the Related Art Conventionally, a so-called wedge type adjusting device is often used in a pass line adjusting device for adjusting a roll after polishing the surface of the roll and for moving the roll up and down when replacing the roll itself. There is.

As shown in FIG. 5 (see, for example, Japanese Utility Model Laid-Open No. 55-28087, an equivalent device is disclosed), this device has a pair of wedges for supporting both bearing portions of the lower reinforcing roll 51. 52 and 53 are interposed between the lower reinforcing roll 51 and a support base 54 formed on the housing, and the lower reinforcing roll 51 is moved up and down by simultaneously moving the wedges 52 and 53 in the longitudinal direction thereof. Is. In order to achieve such an action, the wedge is driven by the worm jack 55 arranged between the wedges 52 and 53.
a is moved in the opposite directions, and the pair of wedges 52, 53 are arranged such that their respective inclined surfaces face the opposite directions. Reference numeral 56 is a motor for driving the worm jack.

In the case of the wedge system, horizontal component force of rolling load is generated through the inclined surface of the wedge, but generally, the inclination angle of the wedge inclined surface is made gentle so that the wedge and the inclined surface of the supporting base for supporting them. In many cases, friction between the wedges prevents horizontal movement of the wedge. However, the effect of preventing horizontal movement of the wedge due to friction may not be achieved as expected depending on the surface finish of the inclined surfaces of the wedge and the support, and even after long-term use.

However, in the case of the adjusting device shown in FIG. 5, since the horizontal component force of the rolling load to be applied to the housing is canceled by the worm jack 55, a large supporting device is not required. That is, in this adjusting device, the worm jack 55 plays both the role of driving the wedge and the position lock.

[0006]

However, in the above-mentioned conventional adjusting device, the wedges 52 and 53 can be stroked only between the both end supporting portions 51a of the lower reinforcing roll, and the worm jack is provided between them. Since the 55 and the screw rods 52a and 53a are interposed, the stroke of the wedge is limited to a small stroke. In other words, there are few problems if the vertical stroke is small, such as in a two-stage mill, but there is a problem that it cannot be used in a six-mill that requires a large stroke.

Moreover, since the horizontal component force is applied to the worm jack 55, the worm jack 55 and the threaded portions of the screw rods 52a and 53a are deformed or worn due to long-term use, and highly accurate pass line adjustment is performed. Is impossible.

To address the above-mentioned problem of vertical stroke, if the inclination angle of the wedge is increased in order to obtain a large vertical stroke of the roll by a horizontal stroke of the wedge, the horizontal component force of the rolling load becomes large and the worm jack. Of course, the device itself cannot withstand the load, or its life is significantly shortened.

On the other hand, in order to eliminate such a defect in vertical stroke, a wedge pair in which the inclinations of the wedges are formed in the same direction, which is also adopted in one embodiment of the present invention (see FIG. 1), is used. Although it may be considered, the problem of deformation of the worm jack due to horizontal component of rolling load and deterioration of adjustment accuracy due to the deformation cannot be solved by itself.

The present invention has been made in order to solve the above problems, and the position of the roll during the rolling operation can be firmly locked by a simple structure, and therefore the adjustment accuracy may be deteriorated due to deformation. The aim is to provide a pass line adjustment device.

[0011]

An adjusting device of the present invention is provided so as to support both bearing portions of a roll in a rolling mill, and moves the wedge up and down by moving the wedge substantially horizontally. A wedge-type pass line adjusting device, in which a pair of wedges are substantially horizontally integrated, and are inclined in the same direction and at the same horizontal angle, and at the end side of the wedges. A drive device for horizontally moving the wedge is connected via a rod member, and an interference fit type sleeve for holding the wedge at an arbitrary position is externally attached to the drive device. The sleeve is usually configured to firmly grip the rod and release the grip by press-fitting a fluid between the contact surfaces with the rod.

As the drive device, a hydraulic cylinder type actuator or a worm jack can be adopted.

The worm jack is a known one, and the worm and the worm wheel are used to move the screw rod member in its axial direction.

[0014]

According to the adjusting device of the present invention,
Since the wedge can be horizontally moved from the end side thereof, that is, from the position outside the end of the roll via the rod, if the drive device is appropriately spaced from the wedge, the wedge can be moved with a desired stroke. It can be moved horizontally. By extension, roll interval (pass line interval)
Can be greatly expanded if necessary. The horizontal force component of the rolling load applied to the wedge is not the force transmission part itself of the drive unit (the piston of the hydraulic cylinder or the screw of the worm jack, etc.) but the interference fitting type sleeve attached to the housing. Therefore, the wedge can be firmly and accurately held at the desired position, and there is no risk of damaging the force transmission portion of the drive portion even if it is used for a long period of time.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The adjusting device of the present invention will be described below with reference to the accompanying drawings. 1 is a front view showing an embodiment of the adjusting device of the present invention, FIG. 2 is a schematic front view showing an example of a wedge in the adjusting device of the present invention, and FIG. 3 is a schematic front view showing the operation of the adjusting device of FIG. 4 is a cross-sectional view showing an example of the interference-fitting type sleeve in FIG.

In FIG. 1, reference numeral 1 denotes an adjusting device incorporated in the lower part of the 6-high mill M. The adjusting device of the present invention can be applied not only to a 6-high mill, but also to a 2-high, 4-high mill or a mill having a different number of roll stages. The adjusting device 1 includes a wedge member 2 and a drive device (hydraulic cylinder) connected to the wedge member 2 via a rod 3.
4 and a lock member (sleeve) 5 attached to the housing of the drive device 4.

The wedge member 2 has inclined surfaces 6a and 7a inclined in the same direction at the same horizontal angle on the lower surface thereof, and is composed of a pair of wedges 6 and 7 connected substantially horizontally. Has been done. Further, the upper surface of the wedge member 2 is formed into a single smooth horizontal surface 2a, and both end supporting portions La of the lowermost rolls (reinforcing rolls in this embodiment) of the three lower roll sets L are placed on the horizontal surface 2a. Are slidably arranged.

The wedge member 2 has a pair of slanted surfaces 8a formed on the housing 8 of the mill M, and the slanted surfaces 6 thereof.
A and 7a are slidably arranged so as to face each other.
The inclined surface 8a of the housing 8 is formed such that the angle (the horizontal angle in the claims) with respect to the horizontal plane is substantially complementary to the inclined surfaces 6a and 7a of the wedge member 2. Therefore, when the wedge member 2 is moved in the horizontal direction, the wedge member 2 is also displaced in the vertical direction, so that the lower roll set L on the wedge member 2 is also vertically moved. Generally, steel is used as the material of the wedge member 2, and a non-ferrous metal such as a copper alloy is used for the sliding surface of the housing 8 with the inclined surface 8a in order to obtain good sliding.

The wedges 6 and 7 may be formed by connecting two separate pieces, or may be integrally formed in the shape shown in FIG. Further, if the space in the vertical direction allows, as shown in FIG. 2, the inclined surface 9a may be composed of one continuous wedge 9. In this case, the pair of inclined surfaces 8a of the housing 8 may be formed at different heights.

One end of the wedge member 2 (the left end in FIG. 1)
A rod 3 is swingably connected at one end thereof by a pin 10. The other end of the rod 3 is connected to a piston rod (not shown) of a hydraulic cylinder 4 as the driving device. The rod 3 may also be a long piston rod.

The hydraulic cylinder 4 is of a known type, and is swingably attached to the housing 8 by a pin 11. In this way, the hydraulic cylinder 4 is made swingable,
Since the rod 3 and the wedge member 2 are swingably connected, the connection with the hydraulic cylinder 4 is not hindered even if the wedge member 2 moves up and down.

When the adjusting device 1 is operated, the wedge member 2 is moved in the direction of arrow A as shown in FIG. On the contrary, when the wedge member 2 is moved upward, the wedge member 2 may be moved in the direction of arrow B in FIG. In this way, the pass line is adjusted.

Next, the lock member 5 will be described. As shown in FIG. 4, the lock member 5 is a sleeve closely fitted to the outer circumference of the rod (or piston rod) 3,
It is, so to speak, a tight fit type sleeve (hereinafter referred to as sleeve 5). That is, this sleeve 5 is shown in FIG.
As shown in FIG. 4, the flanges 12 and 13 are fixed to both ends of the cylindrical portion 14, and the inner peripheral surface of the cylindrical portion 14 is formed with a groove 14a which is connected to the whole like a spiral or a lattice. Therefore, a portion (hereinafter, referred to as a protruding portion) 14b other than the groove 14a is firmly and closely attached to the outer peripheral surface of the rod 3. By doing so, the rod 3, and thus the wedge member, is held immovably. A hydraulic oil inlet 15 communicating with the groove 14a is formed on one flange 12, and a hydraulic oil outlet 16 communicating with the groove 14a is formed on the other flange 13. There is.

When the holding of the rod 3 of the sleeve 5 is released, as shown in FIG. 4 (b), hydraulic oil may be press-fitted from the inlet 15. Then, the cylindrical portion 14 swells slightly, and the force for gripping the rod 3 by the protrusion 14b is reduced or released, so that the rod 3 can be freely moved. When gripping the rod 3 again, the discharge port 16
The hydraulic oil may be discharged from the. And this sleeve 5
Is fixed to the hydraulic cylinder 4 with bolts or the like using the flange 13, for example. In FIG. 4 (b), the degree of expansion is illustrated to be much larger than it actually is for easier understanding, but the actual expansion is extremely small. Reference numeral 17 denotes a sealing ring such as an O ring.

The adjusting device 1 constructed as described above operates quickly because the wedge member 2 is stroked by hydraulic drive, and the rod 3 is gripped and released, and the operation is quick. There is also very little risk of damage. Further, it is possible to separate the hydraulic cylinder 4 from the wedge member 2 and lengthen the stroke of the wedge member 2 without any trouble.

Although a hydraulic cylinder is used as the drive unit in the above-mentioned embodiment, the present invention is not limited to the hydraulic cylinder, and any drive unit to which the above-mentioned sleeve 5 such as a known worm jack can be applied. Can be used. That is, although not shown, the worm jack is separated from one end of the wedge member and pin-coupled to the housing, the rod pin-coupled to the one end of the wedge member is coupled to the worm jack, and the sleeve is unthreaded. It can be attached to the section and fixed to the warm jack.

Further, in the above embodiment, the adjusting device is arranged below the mill and the lower roll set is moved up and down, but the present invention is not particularly limited to the lower position. The wedge member is arranged on the inclined surface formed on the upper housing part so that the inclined surface is in sliding contact, and further, the both end supporting portions of the upper roll set are slidably suspended on the horizontal surface portion of the wedge member. You may comprise. The arrangement of the hydraulic cylinders and rods may be the same as in the above embodiment. Then, the upper roll set can be moved up and down to adjust the pass line.

[0028]

According to the present invention, since the sleeve, which is, so to speak, an interference fit type, is simple and a strong gripping force is applied by a structure different from the drive source, the wedge can be accurately positioned and can be used for a long period of time. Even without damaging the drive source, accurate path line adjustment can be performed.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an adjusting device of the present invention.

FIG. 2 is a schematic front view showing an example of a wedge in the adjusting device of the present invention.

3 is a schematic front view showing the operation of the adjusting device of FIG. 1. FIG.

FIG. 4 is a cross-sectional view showing an example of the interference-fitting type sleeve in FIG.

FIG. 5 is a schematic front view showing an example of a conventional adjusting device.

[Explanation of symbols]

 1 ... Adjusting device 2 ... Wedge member 3 ... Rod 4 ... Hydraulic cylinder 5 ... Sleeves 6, 7, 9 ... Wedges 6a, 7a, 9a ... Inclined surface

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor, Mitsuhei Noshita, Kashima-cho, Kashima-gun, Kashima-gun, Ibaraki Prefecture, Sumitomo Metal Industries, Ltd. Kashima Steel Works (72) Inventor, Ryoichi Yamase Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo 3-1-1 Kawasaki Heavy Industries Ltd. Kobe factory

Claims (3)

[Claims] 1. A wedge-type path line adjusting device which is provided to support both bearings of a roll in a rolling mill and which can move the wedge up and down by moving the wedge substantially horizontally. , A pair of wedges are integrated substantially horizontally, and are inclined in the same direction and the same horizontal angle, and a drive device for horizontally moving the wedges is provided on the end side of the wedges. The drive device is provided with an interference-fitting type sleeve for holding the wedge at an arbitrary position, the sleeve being externally attached to the rod. The path line adjusting device is configured such that the grip is released and the grip is released by press-fitting a fluid between the contact surfaces with the rod. 2. The pass line adjusting device according to claim 1, wherein the drive device is composed of a hydraulic cylinder type actuator. 3. The pass line adjusting device according to claim 1, wherein the driving device is formed of a worm jack.