JP3205719B2 - 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. Further, as shown in FIG. 5, an adjusting device described in Japanese Patent Publication No. 4-16243 (conventional example II) has a roll mounted on an eccentric shaft 106.
Two boxes 112 are mounted with the pin 103 interposed therebetween. Pins 118 are inserted into the box 112 in parallel with the eccentric shaft 106, 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 8 and the eccentric end 121 of the tip of the operation shaft 122 is
118, the two operation shafts 122 are rotated, and the pins 118 are pushed and pulled, so that the two boxes 112
Is moved in parallel with the eccentric shaft 106, and the roll 103 is adjusted to match the pass line.

[0003]

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 rod or wire obtained by rolling does not become circular, It goes without saying that the dimensional accuracy also decreases. Therefore, an object of the present invention is to provide an adjusting device that can accurately adjust the alignment of a plurality of grooved rolls with an extremely simple operation.

[0005]

According to a first aspect of the present invention, there is provided a roll alignment adjusting device for a rolling mill, comprising: a plurality of hole-shaped rolls arranged at equal circumferential intervals around a pass line through which a rod or wire passes. A rolling mill having an eccentric shaft rotatably supporting each of the grooved rolls, wherein the alignment adjustment device for the grooved rolls abuts one end of the eccentric shaft to move the eccentric shaft in the axial direction and the like. The eccentric shaft includes an adjusting shaft that is pushed toward the end, and a spring unit that is attached to the other end of the eccentric shaft and pushes the eccentric shaft toward one end in the axial direction to urge the shaft. According to a second aspect of the present invention, in the roll alignment adjusting device for a rolling mill, the adjusting shaft is screwed into a female screw portion formed in the housing and can be screwed freely, and one end of the eccentric shaft is orthogonal to the axis of the eccentric shaft. One end of the eccentric shaft is provided with a pressure receiving surface formed in a conical shape, and an intermediate portion of the adjustment shaft abutting on the pressure receiving surface is provided with a pressing surface formed in a tapered shape. It is characterized by having. The roll alignment adjusting device for a rolling mill according to claim 3, wherein the spring means comprises: a spring support shaft attached to the eccentric shaft;
A plurality of disc springs inserted into the spring support shaft; and a spring storage cylinder that accommodates the disc spring and is screwed into a female thread portion formed in the housing and is capable of screwing in the compression / release direction of the disc spring. It is characterized by consisting of.

According to the first aspect of the present invention, since the other end of the eccentric shaft is pressed and urged by the spring means, the alignment can be adjusted so that the roll hole is aligned with the pass line only by the pushing operation of the adjusting shaft. Therefore, the operation is simple. According to the second aspect of the present invention, even if the amount of screwing rotation of the adjusting shaft is large, the amount of the tapered pressing surface of the adjusting shaft pushing the conical pressure receiving surface of the eccentric shaft is minute, so that fine adjustment of the alignment can be performed. It is easy, and since the resistance of the pressing surface against the urging force of the spring means is large, no misalignment is caused by the spring means. According to the third aspect of the invention, the resilience of the disc spring can be adjusted by screwing the spring storage cylinder, so that the same spring biasing force can be applied even if the roll position is changed by changing the size or the like.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view showing a roll alignment adjusting device according to an embodiment of the present invention, FIG. 2 is an enlarged view of a main part of the alignment adjusting device, FIG. 3 is a front view of a four-roll rolling mill to which the present invention is applied, FIG. 4 is also a front view of the four-roll rolling mill.

First, the basic configuration of a four-roll rolling mill to which the present invention is applied will be described with reference to FIGS. Reference numerals 1 and 2 denote a pair of horizontal rolls arranged above and below the pass line.
4 is a vertical roll installed on the left and right of the pass line.
The horizontal rolls 1 and 2 and the vertical rolls 3 and 4 are arranged orthogonally to each other, and are rolled by the grooved rolls 1 to 4 so that the rod wire is reduced in diameter and finished to a desired final diameter. Each of the hole type rolls 1 to 4 is rotatably supported by a housing 6 by an eccentric shaft 5.

As shown in FIG. 1, both end supporting portions 51 of the eccentric shaft 5 are rotatably supported by the housing 6 via bearing bushes 7, and a central supporting portion 52 is supported by two bearings 8. The roll holding cylinder 9 is rotatably held, and the roll holding cylinder 9 holds hole-shaped rolls 1 to 4 one by one. An external gear 10 for receiving a rotational driving force is formed at one end of the roll holding cylinder 9.

As shown in FIGS. 3 and 4, a worm wheel 11 is formed integrally with one end of the eccentric shaft 5, and a worm 12
Are engaged. Adjusting shaft 2 provided with this worm 12
When 2 is rotated by the adjusting levers 20 and 30 via the connecting shaft, the worm wheel 11 is rotated at a speed reduced to several tenths, and the eccentric shaft 5 is also rotated. In this case, since both end supporting portions 51 of the eccentric shaft 5 and the center holding portion 52 are eccentric to each other, the roll 1 is rotated with the revolution of the center holding portion 52.
A reduction of ~ 4 is adjusted.

Next, the details of the roll alignment adjusting device will be described with reference to FIGS. At one end (the lower end in FIG. 1) of the eccentric shaft 5, a pressure receiving surface 53 formed in a conical shape is formed as shown in an enlarged manner in FIG. The adjustment shaft 40 is arranged at a position orthogonal to the axis of the eccentric shaft 5 and in contact with the pressure receiving surface 53. The adjusting shaft 40 has a male screw portion 41 and a tool insertion hole 42 formed on the base end side, and a tapered pressing surface 43 formed at an intermediate portion. Adjustment axis 4
The 0 male screw portion 41 is screwed into a female screw hole 61 formed in the housing 6 and is fixed by a lock nut 44. The distal end 45 of the adjustment shaft 40 is inserted into a bush 62 fixed to the housing 6 to fix the axis and to be rotatably held. Therefore, when the lock nut 44 is loosened, a handle is inserted into the tool insertion hole 42, and the adjustment shaft 40 is rotated, the adjustment shaft 40
Is screwed and displaced in the axial direction. As a result, the adjustment shaft 40
Is pushed in the direction of arrow a, the pressing surface 43 pushes the pressure receiving surface 53, and displaces the eccentric shaft 5 in the direction of arrow b.

On the other hand, as shown in FIG. 1, at the other end of the eccentric shaft 5, a spring means 60 is provided. That is, the spring support shaft 61 is formed concentrically, and an appropriate number of disc springs 62 are inserted into this. A spring housing cylinder 63 for housing the disc spring 62 is provided, and a male screw portion 64 is coaxially fixed to the spring housing cylinder 63. The male screw portion 64 is screwed into a female screw hole 66 of a mounting plate 65 fixed to the housing 6 and fixed by a lock nut 67. Reference numeral 68 denotes a tool insertion hole formed at the other end of the male screw portion 64.

The disc spring 62 always pushes the eccentric shaft 5 in the axial direction, so that the pressure receiving surface 53 at the other end and the pressing surface 43 are in contact with each other. Therefore, there is no possibility that the roll is misaligned during operation. When the adjusting shaft 40 is unscrewed, the eccentric shaft 5 is pushed in the direction opposite to the arrow b in FIG.

With the above configuration, when the adjusting shaft 40 is screwed down and screwed down, the tapered pressing surface 43 can push the eccentric shaft 5 in the direction of arrow b by a component force in the direction perpendicular to the axis. Conversely, when the adjustment shaft 40 is unscrewed, the eccentric shaft 5 is pushed back in the direction opposite to the arrow b by the urging force of the disc spring 62. Therefore, in the present embodiment, the alignment of the rolls 1 to 4 can be adjusted only by adjusting the screwing of the adjustment shaft 40.

In the spring means 60, when the lock nut 67 is loosened and the male screw portion 64 of the spring storage cylinder 63 is tightened or loosened, the urging force of the disc spring 62 can be increased or decreased. Thus, even when the roll position is changed, a constant spring force can be obtained.

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

[0017]

According to the first aspect of the present invention, since the other end of the eccentric shaft is urged by the spring means, the hole of the roll can be adjusted to the pass line only by the pushing operation of the adjusting shaft. Operation is easy because it is possible.
According to the second aspect of the present invention, even if the amount of screwing rotation of the adjusting shaft is large, the amount of the tapered pressing surface of the adjusting shaft pushing the conical pressure receiving surface of the eccentric shaft is minute, so that fine adjustment of the alignment can be performed. Easy. According to the invention of claim 3,
The spring force of the disc spring can be adjusted by screwing the spring storage cylinder, so that the same spring biasing force can be applied even when the roll position is changed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a roll alignment adjusting device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the alignment adjustment device.

FIG. 3 is a front view of a four-roll rolling mill to which the present invention is applied.

FIG. 4 is a front view of the four-roll rolling mill.

FIG. 5 is a cross-sectional view of a conventional roll alignment adjusting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal roll 2 Horizontal roll 3 Vertical roll 4 Vertical roll 5 Eccentric axis 40 Adjustment axis 43 Pressing surface 53 Pressure receiving surface 60 Spring means 62 Disc spring

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ryo Takeda 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Prefecture Inside of Mizushima Works, Kawasaki Steel Corporation (72) Inventor, Hidenori Kondo 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki (56) References JP-A-11-47809 (JP, A) JP-B-51-10192 (JP, B1) JP-B-4-16243 (JP, B2) JP-B-8-10423 (JP) , Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 31/18 B21B 13/10

Claims (3)

(57) [Claims] 1. A plurality of perforated rolls arranged at equal circumferential intervals around a pass line through which a rod or wire passes, and an eccentric shaft rotatably supporting each of the perforated rolls. In the rolling mill provided, the alignment control device for the grooved roll is attached to the other end of the eccentric shaft, and an adjustment shaft that contacts one end of the eccentric shaft and pushes the eccentric shaft toward the other end in the axial direction. A spring means for pushing the eccentric shaft toward one end in the axial direction to bias the eccentric shaft. 2. The eccentric shaft according to claim 2, wherein said adjusting shaft is screwed into a female screw portion formed in said housing and is screwable, and is arranged at one end of said eccentric shaft in a direction orthogonal to the axis of said eccentric shaft. A pressure receiving surface formed in a conical shape is provided at one end of the eccentric shaft, and a pressing surface formed in a tapered shape is provided at an intermediate portion of the adjusting shaft that comes into contact with the pressure receiving surface. Item 2. The roll alignment adjusting device according to Item 1. 3. The spring means comprises: a spring support shaft attached to the eccentric shaft; a plurality of disc springs inserted into the spring support shaft; and a female screw portion which accommodates the disc spring and is formed in a housing. 2. The roll alignment adjusting device according to claim 1, further comprising a spring storage cylinder which is screwed into the spring and is capable of screwing in the compression / release direction of the disc spring.