JP2002137009A - Removing device for bar steel roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removing device for bar steel roll which can be used for both close fit lock and release of ring roll 2 and roll shaft 1 and roll shaft lifting. SOLUTION: This removing device for bar steel roll is equipped with a nozzle to be used for filling oil through oil filling port 31 installed on the roll shaft end of bar steel roll 20, the rod 16 on the tip of which this nozzle is installed and in the inside of which there is an oil supply route 17 to this nozzle and the cylinder 18 which holds this rod 16 and moves back and forth by hydraulic drive. Besides, this device has a lifting jig 23 which meets a lifting jig holder 22 installed on the edge of said roll shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing and attaching a steel bar roll.

[0002]

2. Description of the Related Art In a continuous rolling mill train for hot-rolling strips such as wires and bars, a plurality of roll assemblies are arranged at equal intervals around the center of a pass as a sizing mill for final multi-pass rolling. A bar rolling mill supported by a housing is used. The roll assembly is a composite of a ring roll that comes into contact with a material to be rolled and a roll shaft that fits in a ring hole of the ring roll and supports the ring roll.

A roll rolling mill described in Japanese Patent Application Laid-Open No. H11-104706 is one that has facilitated roll changing work in a strip steel rolling mill. This is a roll rolling mill in which a plurality of roll units and an eccentric cartridge type rolling reduction device for the roll units are attached to a housing, wherein the housing comprises a first housing and a second housing, each of which is a split-type housing that can be freely coupled and separated. A half bearing portion is formed on a mating surface of the first housing, a half bearing portion is formed on a mating surface of the second housing, and a shaft portion of each roll unit has two shafts. It is sandwiched between the first and second housings via an eccentric cartridge in a bearing including the half bearing portion. According to this, if the second housing is removed from the first housing, each roll unit can be taken out of the first housing as it is and the assembly can be performed in the reverse order, so that the disassembly and assembly can be performed with a small number of steps. The roll unit is synonymous with the roll assembly.

[0004]

However, the above-mentioned prior art has the following problems. When the same roll shaft is used before and after the roll replacement, the replacement work of the roll assembly includes a work of replacing the ring roll of the roll shaft using a dedicated device, and this work takes a long time.

When separate roll shafts are used before and after the roll change, the above problem does not occur, but the number of roll shafts is increased and the cost is increased, and a large storage space is required. When the roll is replaced, it is necessary to disassemble the housing in half, and the bearing surface and the like are opened, so that dust and water invade and mechanical trouble is easily caused.

Therefore, the present invention can be applied to a strip steel roll detaching device capable of replacing only a ring roll without disassembling a housing, and particularly to a tightening / releasing of a tight fit between a ring roll and a roll shaft and suspension of a roll shaft. An object of the present invention is to provide a strip steel roll detaching device.

[0007]

According to the present invention, there is provided a nozzle for injecting oil into an oil inlet provided at an end of a roll shaft of a strip steel roll, an oil supply passage for holding the nozzle at a tip end thereof and supplying oil to the nozzle. And a cylinder for holding the rod and hydraulically driving the advance and retreat thereof, and further, a hanging jig receiver provided at the end of the rod at the end of the roll shaft. And a suspending jig that engages with the rod.

In the present invention, the rod preferably holds the nozzle via a resilient seat.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an example of a strip steel roll detaching process using an example of the strip steel roll detaching apparatus of the present invention (hereinafter, referred to as the present apparatus). As exemplified here, the apparatus of the present invention includes a nozzle (oil injection) for injecting oil into an oil injection port 31 provided at the end of the roll shaft of a strip steel roll (eg, the strip steel roll in FIGS. 4 and 5) 20. nozzle)
And a rod (cylinder rod) 16 holding the nozzle 15 at the tip and passing an oil supply passage 17 to the nozzle 15 therein.
And a cylinder (hydraulic cylinder) 18 that holds the rod 16 and hydraulically drives the rod 16 to move forward and backward.

The high-pressure oil is injected from a high-pressure oil inlet 26 of the oil supply passage 17. High pressure oil injection pressure is up to 2000kgf / cm ² (19
About 6 MPa) is preferable. The rod 16 is used to hold down the roll shaft 1 during high-pressure oil injection and to lift the roll shaft 1 after the ring roll 2 and the roll shaft 1 are separated. In order to perform this holding and lifting,
Drive pressure of rod 16 of hydraulic cylinder 18 up to 700 kgf / cm
^It is preferable to keep the pressure at about ² (69 MPa).

The nozzle 15 can be held at the tip of the rod 16 by screwing or the like. However, as shown in this example, when the nozzle 15 is held via a resilient seat (push-in spring, fluid pressure cylinder, etc.) 25, This is preferable because the impact during high-pressure oil injection can be more effectively reduced. When it is difficult to push the end of the roll shaft directly at the rod tip, a pushing jig (eg, a pushing ring) 19 for transmitting the pushing force may be used. It is preferable that a push jig receiver (eg, a ring fitting hole) 21 that engages with a push jig (eg, a press ring) 19 is provided at the tip of the 16.

The apparatus of the present invention further includes a suspending jig (eg, a groove fitting claw plate) 23 which engages with a suspending jig receiver (eg, a circumferential groove) 22 provided at the end of the roll shaft. Have indispensable. This makes it possible to lift the roll shaft 1 after the loose fit engagement with the ring roll 2 is released by the pulling force of the hydraulic cylinder 18, so that unitization of the apparatus can be achieved.

The groove fitting claw plate 23 is preferably, for example, a half arcuate shape as shown in FIG. 1 of strip steel roll
Examples are shown in FIGS. FIG. 4 is a roll arrangement diagram in the housing, and FIG. 5 is a partial detailed view of FIG. FIG. 4 shows a case of a four-roll mill in which four steel bar rolls 20 are arranged at 90 ° intervals around the pass center PC and supported by the housing 11. The strip steel roll 20 is formed by tightly fitting a ring roll 2 having an outer peripheral surface forming a work roll surface to a roll shaft 1.

As shown in FIG. 5, the roll shaft 1 has a ring mounting portion 1A at one end (A end) side, and a ring roll 2 is mounted thereon. The outer peripheral surface of the ring mounting portion 1A forms a male tapered surface that is inclined upward toward the other end (end B) of the roll shaft 1. A taper ring 2A having a female taper surface on the inner diameter side that slides on the male taper surface is fitted on the inner diameter side of the ring roll 2. The tight fit fastening / releasing of the roll shaft 1 and the ring roll 2 is performed by applying a hydraulic pressure between the male and female tapered surfaces. As the oil pressure applying means, a roll shaft 1 is provided with an oil discharge port 32 provided on an outer peripheral surface of a ring mounting portion 1A on an A end side from an oil inlet 31 provided on an end of the roll shaft on the B end side via the inside of the shaft. And has a hydraulic pipe 3 passing therethrough.

The roll shaft 1 has a bearing 4 at the end A and a bearing 5 at the end B. The bearing 4 is supported by an eccentric cartridge 6 attached to a housing 11 so as to be slidable in the axial direction. The bearing 5 includes a screw 7 that is female-threaded to the roll shaft 1.
(Combination of members 7A, 7B, 7C) with bolts 8. A screw holder 9 is female-engaged with the screw 7,
The screw holder 9 is mounted on the housing 11 with the clamp bolt 10.
Has been concluded.

When the screw 7 is rotated, the roll shaft 1 that is externally engaged with the screw 7 moves in the axial direction, so that the axial position of the ring roll 2 can be adjusted. Except for this adjustment,
The screw 7 is fixed (locked) to the screw holder 9 by a lock bolt 12. The eccentric cartridge 6 moves the roll shaft 1 in a direction orthogonal to the shaft, and is used to adjust the distance (that is, the roll-down position) of the center of the ring roll 2 from the center of the path.

The roll shaft 1 has a housing 11 on the B end side.
It is arranged so as to be exposed to the outside, and has a circumferential groove 22 at the exposed end portion of the roll shaft. The circumferential groove 22 serves as a receiving portion of a suspending jig for suspending the roll shaft 1. In the above-described steel bar roll, since the ring roll and the roll shaft can be tightly fastened and released in the housing, only the ring roll can be replaced without disassembling the housing.

Further, from the viewpoint of workability and safety, it is preferable that the device of the present invention is used by being mounted on a mounting base 27 which is immovable and firmly constituted by a steel frame or the like. Hereinafter, the strip steel roll detaching process of FIGS. 1 and 2 will be described.
The object to be detached in this example is the strip steel roll shown in FIGS. The description of the operations before and after this step that do not use the apparatus of the present invention will be omitted.

(1) The exchanging table (rotatable: not shown) on which the housing 11 is mounted is rotated to move the steel bar roll 20 immediately below the nozzle 15, and the center axis of the nozzle 15 and the center axis of the oil inlet 31 are aligned. Thereafter, the lock bolt 12 is released, and the screw 7 is turned to lower the steel bar roll 20 to a position where the eccentric cartridge 6 of the ring roll 2 contacts. (See FIG. 1 (a).) (2) Then, after loosening the clamp bolt 10 to release the screw holder 9 from the housing 11, the pushing ring 19 is set. (See FIG. 1 (b).) (3) Then, the cylinder 18 is "pushed" and the rod 16 is pushed in to advance the ring 19 to the contact position. Where nozzle 15
Automatically connects to the oil inlet 31. Next, the groove fitting claw plate 23 is fitted into the circumferential groove 22. (See Fig. 2 (c).) (4) Next, high-pressure oil injection is performed. Here, the fitting surface between the ring mounting portion 1A and the tapered ring 2A is deformed in the elastic region, and the tight fit state is released. The roll shaft 1 rises slightly away from the ring roll 2. (See FIG. 2D.) (5) Next, the cylinder 18 is pulled and the rod 16 is retracted. Here, the roll shaft 1 is pulled upward from the ring roll 2 (FIG. 2 (e)).

(6) (5) After that, the ring roll 2 is taken out of the housing 11 and a new one is loaded, and then (1) to (5)
Steps reverse to the above (the operation is also reverse: for example, "pull" is "push"
become. ). Then, the above (1) to (6) are executed for each of the plurality of bar steel rolls in the housing.

[0021]

According to the present invention, since the strip steel roll can be detached and attached by one apparatus, workability, operability and work efficiency are improved, and the work space can be saved. Further, the tapered surfaces of the fitted roll shaft and the ring roll have low sliding surface pressure and are lubricated by applying oil injection, so that there is almost no wear or deformation. For this reason, the fitting allowance can be maintained in a healthy state for a long time, which contributes to prolonging the life of parts and has the effect of reducing troubles due to insufficient conduction torque.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one example of a strip steel roll detaching step using one example of a detaching apparatus of the present invention.

FIG. 2 is an explanatory view showing a steel bar roll detaching step following FIG. 1;

FIG. 3 is a cross-sectional view of a rod tip showing an example of a groove fitting claw plate.

FIG. 4 is a roll arrangement diagram in a housing showing an example of a strip steel roll.

FIG. 5 is a partial detailed view of FIG. 4;

[Explanation of symbols]

 1 Roll shaft 1A Ring mounting part 2 Ring roll 2A Taper ring 3 Hydraulic piping 4,5 Bearing 6 Eccentric cartridge 7 Screw 8 Bolt 9 Screw holder 10 Clamp bolt 11 Housing 12 Lock bolt 15 Nozzle (oil injection nozzle) 16 Rod (Cylinder rod) ) 17 Oil supply path 18 Cylinder (hydraulic cylinder) 19 Push jig (push ring) 20 Steel roll 21 Push jig receiver (Ring fitting hole) 22 Suspension jig receiver (circumferential groove) 23 Suspension jig (groove) Fitting claw plate) 25 Elastic seat 27 Mounting base 31 Oil inlet 32 Oil outlet

Claims (2)

[Claims] 1. A nozzle for injecting oil into an oil injection port provided at an end of a roll shaft of a strip steel roll, a rod holding the nozzle at its tip and passing an oil supply passage to the nozzle therein. A cylinder that holds the rod and hydraulically drives the rod to move forward and backward, and further, a hanging jig that is engaged with a hanging jig receiver provided at an end of the rod at the end of the roll shaft. And a strip steel roll detaching device. 2. The apparatus according to claim 1, wherein said rod holds said nozzle through a resilient seat.