JP3270725B2 - Roll alignment adjustment device for rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a roll alignment adjusting device for a rolling mill. More specifically, in a wire rod rolling mill that rolls a bar or wire rod with a plurality of grooved rolls, a roll that adjusts the alignment of each roll when assembling the rolling mill, or when exchanging rolls during size change or wear. The present invention relates to an alignment adjusting device.

[0002]

2. Description of the Related Art As a conventional roll alignment adjusting method, there is a method described in Japanese Utility Model Publication No. Hei 8-10423 in which a shim (thin plate for adjusting the thickness) is sandwiched between a roll side surface and a housing (conventional example I). ). The method of using the shim is to predict and set first, measure the presence or absence of misalignment, disassemble and replace the shim again, repeat this operation, and perform final assembly when the misalignment is eliminated.

In the adjusting device described in Japanese Patent Publication No. 4-16243 (conventional example II), two boxes 112 are mounted on an eccentric shaft 106 with a roll 103 interposed therebetween, as shown in FIG. Pin 112 in parallel with eccentric shaft 106 in 112
, And one end of each pin 118 is pressed against the housing 102, and the operation shaft 122 is inserted into the box 112 so as to be orthogonal to the pin 118, and the eccentric end of the tip of the operation shaft 122 is inserted.
121 is engaged with the pin 118, the two operation shafts 122 are rotated, the pins 118 are pushed and pulled, and the two boxes 112 are moved in parallel with the eccentric shaft 106.
103 is adjusted to match the pass line.

[0004]

Therefore, in the conventional example I, the disassembly, measurement, and assembly must be performed many times, which is very troublesome. Also,
Also in the conventional example II, the two operation shafts 122 on both sides of the roll 103 must be operated at the same time, and different operations must be performed to pull one and push the other. If there is any gap between the boxes 112, there is a problem that the misalignment occurs immediately.

However, if the cores of two, three, or four hole-shaped rolls are not perfectly aligned around the pass line, the cross-sectional shape of the bar obtained by rolling does not become circular. It goes without saying that the dimensional accuracy also decreases.

Therefore, the present invention provides a very simple operation,
An object of the present invention is to provide an adjusting device capable of accurately adjusting the alignment of a plurality of grooved rolls. In addition, the present applicant has developed a rolling mill in which the roll unit can be easily replaced and the productivity of the rolling operation is remarkably increased, in which the roll unit is sandwiched by split-type housings and the number of disassembly and assembly steps of the roll unit is reduced as much as possible. An object of the present invention, however, is to provide a roll alignment adjustment device that does not change the alignment adjustment value when the split mold housing is separated, and that can be easily adjusted with a small number of steps after assembly.

[0007]

A roll alignment adjusting device for a rolling mill according to claim 1 is a roll alignment adjusting device for a roll rolling mill in which a plurality of roll units are housed in a housing, the adjusting mechanism including the adjusting mechanism; A chuck for connecting an adjusting rod of the mechanism to a shaft end of each roll unit, wherein the adjusting mechanism is fixed to a housing, an outer nut having an inner thread formed on an inner periphery, and an outer nut having an outer thread formed on an outer periphery. A male screw is formed on the inner periphery, a female screw is formed on the inner periphery, and an inner nut is rotatably operated from the outside, and an adjusting rod on the outer periphery is formed with a male screw engaged with the female screw of the middle nut. And a first screw consisting of a female screw of the outer nut and a male screw of the middle nut, and a second screw consisting of a female screw of the middle nut and a male screw of the adjusting rod, in which the torsion directions are mutually A pair of screws, and wherein the screwing amount is double nut are different slightly. 3. A roll alignment adjusting device for a rolling mill according to claim 2, wherein said housing is a split housing comprising a first housing and a second housing for clamping a shaft portion of a roll unit, and an outer nut of said adjusting mechanism is provided in said first housing. And the chuck is divided into a first half chuck and a second half.
The first half chuck is detachable from the first half chuck.

According to the first aspect of the present invention, when the middle nut of the adjusting mechanism is turned, the adjusting rod having the reverse thread is advanced or retracted very slightly, so that fine adjustment of the alignment can be easily performed. According to the second aspect of the present invention, since the adjusting mechanism is fixed to the first housing, when the second housing is detached from the first housing, if only the first half chuck of the chuck is detached, the roll unit is detached. Can be taken out.
Since the adjustment mechanism does not need to be disassembled, only fine adjustment is required during reassembly, and alignment adjustment can be performed extremely easily.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 4 is an exploded perspective view of a split-type housing of a four-roll rolling mill to which the present invention is applied, FIG. 5 is a plan view of the first housing 3 with the roll units R1 and R2 taken out, and FIG. FIG. 7 is an exploded side view of the split housing, FIG. 8 is a roll unit R1,
It is a top view of the 1st housing 3 in the state where R2 was incorporated.

4 to 6, reference numeral 3 denotes a first housing;
Reference numeral 4 denotes a second housing.
Thus, a split housing is formed. That is,
When the first and second housings 3 and 4 are joined to each other at their mating surfaces and fastened with tie bolts 6, the four roll units R1 and R2 are rotatably supported and can be held in a state where they can be rolled. I have.

Further, when viewed in detail, a bolt insertion hole 7 for passing a tie bolt 6 and a female screw hole 8 are formed in the inner ribs 5 of the first and second housings 3 and 4, and the second housing 4 is connected to the first housing. 3 can be fastened with tie bolts 6, or through bolt insertion holes formed in both housings 3, 4, and can be fastened from both sides with hydraulic nuts or the like.

The upper surfaces of the inner ribs 5 and the outer peripheral ribs 9 of the first and second housings 3 and 4 are formed as mating surfaces.
Four roll units R1 and R2 are placed at appropriate places on the inner rib 5.
Is formed in the shape of a semi-circular half bearing for supporting the bearing. In the known reduction amount adjusting device, the eccentric cartridge is fitted and held in a hole formed in the housing by an integral sleeve, but the eccentric cartridge of the roll unit R1 used in the present invention is divided into two parts in the radial direction. A half-type cartridge is used. The eccentric cartridge of the roll unit R2 uses an integral sleeve. Then, as shown in FIG.
The first half cartridge 11, which is one of the split eccentric cartridges constituting the roll amount adjusting device for the roll unit R1, is fitted into the half bearing portion of the second housing. As shown in FIG. A second half cartridge 12, which is the other split mold, is fitted in the half bearing portion 4 of FIG.

In the first and second half cartridges 11 and 12 constituting the eccentric cartridge, the center of the outer circumference circle and the center of the inner circumference circle are displaced in the assembled state, and the thickness gradually changes in the circumferential direction. It is a sleeve to do. The first half cartridge 11 of the eccentric cartridge is rotatably fitted to the half bearing portion of the first housing 3, and the second half cartridge 1
2 is rotatably fitted in the half bearing portion of the second housing 4, so that when the first half cartridge 11 rotates in the bearing in which the two half bearing portions are combined, the second half cartridge 12 is also rotated. , Can be pushed around in the same bearing to function as an eccentric cartridge. Therefore, this eccentric cartridge (first and second half cartridges 11,
12) Insert the shaft of the roll unit R1 into the inner circumference of
Eccentric cartridge (first and second half cartridges 11,
When 12) is rotated around its own axis, the roll unit R
One shaft center revolves, the distance between the pair of drive rolls 1 and 1 increases and decreases, and the roll reduction amount can be adjusted.

The roll unit R of the driving rolls 1 and 1
As described above, the eccentric cartridge 1 includes the first half cartridge 11 and the second half cartridge 12, and the first half cartridge 11 and the second half cartridge 12 have substantially the same configuration. However, as will be described later, the only difference is that the sector gear receiving the cartridge rotation torque is attached to the first half cartridge 11 and not attached to the second half cartridge.

The eccentric cartridge for the roll unit R2 of the idler rolls 2 and 2, although not shown, is an eccentric sleeve externally fitted to both ends of a shaft supporting the idler roll 2 so as to eccentrically support the shaft. It is composed of As shown in FIG. 5, an eccentric sleeve at one end of the shaft is fitted to an arc member 24 rotatably held by the first housing 3, and a key 25 provided on a sleeve fitting surface of the arc member 24. Thus, positioning when the roll unit R2 is attached and relative rotation stop are performed. A sector gear 26 is fixed to the arc-shaped member 24. The eccentric sleeve is rotatably fitted in a bearing in which two half bearing portions of the first housing 3 and the second housing 4 are combined. Therefore, when the eccentric sleeve rotates integrally with the shaft in the bearing in which the two half bearing portions are combined, the function as the eccentric cartridge can be achieved.

FIG. 7 shows a state where the second housing 4 is detached from the first housing 3. Drive roll 1,
The motor 31 and the transmission shaft 3 constituting the reduction amount adjusting device 1
2. Rotary drive mechanism 30 such as drive shaft 33, worm 34
Are all attached to the first housing 3 side. FIG.
Although not shown, the rotary drive mechanism for the amount of reduction of the idler rolls 2 and 2 is also attached to the first housing 3 side.

The sector gears 13 and 2 receive torque for rotating the eccentric cartridges of the roll units R1 and R2.
6 is a first half cartridge 11, as shown in FIG.
It is attached only to the 21 side.

Therefore, when the motor 31 shown in FIG. 7 is driven and the first half cartridge 11 on which the sector gear 13 is mounted is rotated by the worm 34 of the drive shaft 33,
When the second half cartridge 12 is pushed around in the bearing portions of the first and second housings 3 and 4, a pair of drive rolls 1 and 1 are driven.
Can be adjusted. Idler roll 2,
2, the motor 2 and the rotary drive mechanism attached to the first housing 3 rotate the arc-shaped member 2 through the sector gear 26.
By rotating the eccentric sleeve 4, the eccentric sleeve rotates, so that the amount of reduction of the idler rolls 2, 2 can be adjusted.

As described above, the roll mill of the present invention comprises:
When the split first and second housings 3 and 4 are separated as shown in FIG. 7, the roll units R1 and R2 can be easily taken out, and the roll units R1 and R2 can be separated by the first and second housings 3 and 4. When it is clamped, the roll unit can be assembled by itself, and it is characterized in that it can be easily disassembled and assembled.

Next, an alignment adjusting apparatus according to this embodiment will be described with reference to FIGS. FIG. 1 is a plan view of an alignment adjusting device according to an embodiment of the present invention, FIG. 2 is an enlarged plan view of the adjusting device, and FIG. 3 is a side view of a chuck.

As shown in FIGS. 1 and 2, the adjusting device of this embodiment comprises an adjusting device 40 and a chuck 60. The adjusting device 40 includes an outer nut 41, a middle nut 43, and an adjusting rod 51.

The outer nut 41 has a female screw 42 formed on the inner periphery thereof, and is fixed to the first housing 3 with a bolt 56. The second housing 4 has a semicircular concave portion having an outer nut 41.
Is not fixed. The middle nut 43
A male screw 44 is formed on the outer circumference, a female screw 45 is formed on the inner circumference, and a hexagonal portion 46 for fitting a wrench or the like is formed on the outer end. The middle nut 43 is screwed to the outer nut 41, and the female screw 42 and the male screw 44 constitute a first screw 47. Reference numeral 48 denotes a lock nut of the middle nut 43.

The adjusting rod 51 is formed by integrally forming an engaging flange 53 at a base end of a rod member 52, and a male screw 54 is formed at a distal end of the rod member. Then, the rod member 52 is engaged with a slip key 57 formed partially on the outer nut 41, rotation is prevented, and only axial movement is permitted. The male screw 54 of the adjusting rod 51 is screwed with the female screw 45 of the middle nut.
And the female screw 45 form a second screw 55. In addition,
Reference numeral 49 denotes a lock nut for eliminating backlash of the adjustment rod 51.

The first screw 47 and the second screw 55 have opposite twisting directions. For example, if the former is a right-hand screw, the latter is a left-hand screw. Also, the mutual screwing amounts are slightly different. Therefore, when the middle nut 43 is rotated by a tool, the middle nut 43 is screwed with respect to the outer nut 41 but the adjustment rod 51 is retracted, so that the total screwing amount is small. Therefore, fine adjustment of the alignment becomes very easy.

As shown in FIGS. 1 to 3, the chuck 60 has a first connecting portion 61 for holding the engaging flange 53 of the adjusting rod 51 and a second connecting portion 64 for holding the shaft end 70 of the roll unit R1. Consists of The first coupling part 61
The flange 63 is attached to the base 62 having the recess formed in the axial direction, and is connected so as not to come out of the engaging flange 53. The second coupling portion 64 is composed of a first half chuck 65 that supports the lower half of the shaft end bisected in the radial direction, and a second half chuck 66 that covers the upper half of the shaft end.

The shaft end 70 of the roll unit R1 is formed with a groove 71 having a trapezoidal cross section, and the inner periphery of the first half chuck 63 and the second half chuck 66 is also formed with a projection 67 having a trapezoidal cross section. . Thus, the second coupling portion 64 and the roll unit R1 do not shift in the axial direction or the radial direction.

The second half chuck 66 is connected to the first half chuck 65 by bolts 68, and the second half chuck 66 is not fixed to the second housing 4. The first half chuck 65 is connected to the first half cartridge 11 of the eccentric cartridge by a connection bar 72. Therefore, when the second housing 4 is separated from the first housing 3, the chuck 60
Is left on the first housing 3 side. Therefore, if only the second half chuck 66 is unscrewed and removed, the roll unit R1 can be easily taken out of the first housing 3.

Since the adjustment mechanism 40 also remains in the first housing 3 as it is, the alignment adjustment value does not change, and there is no need to perform zero adjustment between a plurality of roll units during reassembly. Therefore, since only fine adjustment according to the new roll needs to be performed, alignment adjustment after assembly can be easily performed.

Although the above embodiment is a four-roll rolling mill, the present invention can be applied to a two-roll or three-roll rolling mill.

[0030]

According to the first aspect of the present invention, when the middle nut of the adjusting mechanism is turned, the adjusting rod which is a reverse screw advances and retreats very slightly, so that fine adjustment of the alignment can be easily performed. According to the second aspect of the present invention, since the adjusting mechanism is fixed to the first housing, when the second housing is detached from the first housing, if only the first half chuck of the chuck is detached, the roll unit is detached. Can be taken out. Since the adjustment mechanism does not need to be disassembled, only fine adjustment is required at the time of reassembly, and alignment adjustment can be performed extremely easily.

[Brief description of the drawings]

FIG. 1 is a plan view of an alignment adjustment device according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of the adjusting device.

FIG. 3 is a side view of the chuck.

FIG. 4 is an exploded perspective view of a split housing of a four-roll rolling mill to which the present invention is applied.

FIG. 5 is a plan view of the first housing 3 with the roll units R1 and R2 taken out.

6 is a bottom view of the second housing 4. FIG.

FIG. 7 is an exploded side view of the split mold housing.

FIG. 8 is a plan view of the first housing 3 in a state where the roll units R1 and R2 are incorporated.

FIG. 9 is a cross-sectional view of a conventional alignment adjustment device.

[Explanation of symbols]

 Reference Signs List 40 Adjuster 41 Outer nut 43 Middle nut 47 First screw 51 Adjustment rod 55 Second screw 60 Chuck 65 First half chuck 66 Second half chuck

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Ryo Takeda 1-chome, Kawasaki-dori, Mizushima, Kurashiki-shi, Okayama Pref. Kawasaki Steel Corporation Mizushima Works (56) References JP-A-11-57823 (JP, A JP-A-11-104706 (JP, A) JP-A-4-143008 (JP, A) JP-A-4-71704 (JP, A) JP-A-6-335710 (JP, A) JP-A-7-107 9011 (JP, A) JP-A-7-275906 (JP, A) JP-A 63-90509 (JP, U) JP-A 55-43649 (JP, U) JP 4-16243 (JP, B2) JP-B-51-10192 (JP, B1) JP-B-8-10423 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 13/10 B21B 31/18 B21B 31/24

Claims (2)

(57) [Claims] 1. A roll alignment adjusting device for a roll mill in which a plurality of roll units are housed in a housing, comprising: an adjusting mechanism; and a chuck connecting an adjusting rod of the adjusting mechanism to a shaft end of each roll unit. The adjusting mechanism is fixed to the housing, an outer nut having an internal thread formed on the inner periphery, and an external thread formed on the outer periphery to be screwed with the female screw of the outer nut, and an inner thread is formed on the inner periphery. And an adjusting rod having an outer thread formed on the outer periphery with an inner thread screwed into the inner thread of the inner nut, the inner nut being rotatably operated from the outside. The first screw and the second screw composed of the female screw of the middle nut and the male screw of the adjusting rod are screws having opposite twisting directions and slightly different in screwing amount. is there Roll alignment adjusting device of the rolling mill characterized by and. 2. The housing according to claim 1, wherein said housing is a split housing comprising a first housing and a second housing for holding a shaft portion of the roll unit.
2. A chuck fixed to a housing, the chuck comprising a first half chuck and a second half chuck of a split mold, wherein the second half chuck is detachable from the first half chuck. A roll alignment adjusting device for a rolling mill as described in the above.