JP3413040B2 - Multi-row guide spacing adjustment device for rolling mill - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide provided at an exit or an inlet of a rolling mill, which makes it possible to easily replace the guide in a short time when the size of the guide is changed according to the change of the rolling size. The present invention relates to a gap adjusting device for a multi-row guide for a machine.

[0002]

2. Description of the Related Art Conventionally, when changing the size of guides associated with replacement of rolling rolls of a rolling mill, the guides fixed to the rest bar by the number of hole shapes of the rolling rolls are removed from the rest bar, and then guides of a new rolling size are prepared. It was attached to the rest bar. In addition, when adjusting the height of the upper guide with respect to the rolling roll hole shape when changing the guide in a rolling mill that adjusts the roll gap with the upper roll, suspend the rest bar of the upper guide from the roll carrier with a pair of left and right turn buckles, After loosening the fixing bolts on the right and left, turn the left and right turnbuckles in the required directions to raise and lower the height of the rest bar, aligning the upper guide fixed to the rest bar with the rolling roll hole shape. After the completion of the adjustment, the fixing bolts of the rest bar were tightened to fix the rest bar to the rolling mill.

[0003]

When the rolling size of the rolling mill is changed, it is necessary to change the guide according to the hole shape of the rolling roll to be changed. It is well known that there is a need to go to time to reduce rolling downtime. In the above-mentioned conventional technology, not only is the work of removing and installing and replacing the heavy guides for rolling mills, which are provided in the same number as the hole shape of the rolling rolls, one by one, but also for the work of exchanging the guides. Since the time required for rolling is long, there is a problem that the rolling down time in the factory is long, so there has been a demand for the development of a technique that allows easy guide replacement in a short time.
In addition, since the vertical adjustment of the guide to the rolling roll hole shape is performed by the turnbuckle separately on the left and right, it is difficult to adjust the position of the rest bar horizontally and the screwdriver work of the turnbuckle is heavy work. There is a point, and the development of technology that can adjust the left and right heights at the same time and with a light effort has been desired. From the above, the objects of the present invention are as follows. To be able to complete the guide exchange in a short time when the rolling size is changed. The position of the guide can be adjusted in a short time after the guide is replaced due to the change in rolling size.

[0004]

A gap adjusting device for a multi-row guide for a rolling mill according to the present invention includes a rest bar detachably mounted on a rolling mill frame and a pin vertically movable on the rest bar. A guide base connected to a pair of support arms via a lower guide fitted to the rest bar so as to be movable back and forth, and a lower guide capable of coming into contact with and separated from a rolling roll, and a guide base fitted to the guide base so as to be movable back and forth. , An upper guide that can be brought into and out of contact with the rolling rolls, a pair of gearboxes provided on the roll carrier of the rolling mill, and a rotatably provided gearbox, with an input portion at one end and a bevel gear at the other end. Is provided, and is provided rotatably between a pair of gear boxes and a pinion shaft provided with a pinion gear in the middle,
A pair of bevel gears that mesh with a bevel gear provided on the pinion shaft is provided at both ends of the connecting shaft, and a hydraulic clamp is provided on the rest bar to fix the guide base to the rest bar. One end side of the support arm is vertically movably fitted to an eccentric shaft part of a worm wheel rotatably provided in a gear box, and the other end side of the support arm is a pin on a guide base. It is detachably connected with.

[0005]

When the rolling rolls are replaced in accordance with the rolling size change, the pins are pulled out to disconnect the support arm from the guide base, and the rest bar is unfixed from the rolling mill frame. , Remove the entire rest bar including the upper and lower guides from the rolling mill frame. After removing the entire rest bar, the pair of upper and lower rolling rolls is pulled out from the rolling mill frame, and the pair of upper and lower rolling rolls having a new rolling size is inserted into the rolling mill frame. Next, attach the rest bar incorporating the new rolling size upper and lower guides to the rolling mill frame, connect the support arm and the guide base with pins, and then rotate the input part of the pinion shaft provided in the gear box. Since the pair of left and right worm wheels connected by the connecting shaft rotate by the same amount, the support arm fitted to the eccentric shaft of this worm wheel moves up and down to adjust the position of the upper guide. I do. After adjusting the vertical position of the upper guide, adjust the front and rear of the upper guide (front and rear in the direction of travel of the rolled material) so that the tip of the guide is located near the rolling rolls.
Similarly, if the position of the lower guide in the front-rear direction is adjusted, the rolling size change of the guide is completed.

[0006]

1 to 3, a rolling mill frame 1 is shown.
The rest bar 2 is detachably provided by a fixing means 2a such as a bolt. The lower guide 3 is fitted to the rest bar 2 so as to be movable back and forth with respect to the rolling roll R and can be separated from and contacted with the rolling roll R, and is fixed by fixing means, for example, adjusting bolts 3a and 3b. The upper guide 4 is fitted to the guide base 5 so as to be movable in the front-rear direction with respect to the rolling roll R and can be brought into contact with and separated from the rolling roll R, and is fixed by fixing means, for example, adjusting bolts 4a and 4b.
The guide base 5 is provided so as to be vertically movable within the rest bar 2, and can be fixed to the rest bar by a hydraulic clamp 6. The lower ends of the support arms 8 are separably connected to the connecting portions 5a provided on both sides of the guide base 5 via pins 7. A pair of gear boxes 9 and 9 is provided on a roll carrier 13 provided in the rolling mill frame 1 so as to be vertically movable.
Is fixed. As shown in FIGS. 4 to 6, pinion shafts 10 are rotatably supported by the pair of gear boxes 9, respectively. Each pinion shaft 10 is provided with a bevel gear 10a on one end side (left side in FIG. 5), an input portion 10b for rotating the pinion shaft on the other end side, and a pinion 10c in the middle portion. It is provided. The pinion 10c is meshed with a worm wheel 11 that is rotatably provided in the gear box 9. This worm wheel is provided with an eccentric shaft portion 11a. The eccentric shaft portion is movably fitted in a fitting hole 8b formed on the upper end side of the support arm 8. The support arm 8 is a gear box 9
Is provided in the guide groove 9a so as to be vertically movable.
The vertical movement of the support arm 8 is enabled by the eccentric shaft portion 11a moving in the fitting hole 8b. For example, the fitting hole 8b is horizontally long as shown in FIG. 6, and the eccentric shaft portion 11a is moved in the guide groove 9a about the rotation axis of the worm wheel 11 to move the support arm up and down. . A connecting shaft 12 is rotatably provided between the pair of gear boxes 9. A pair of bevel gears 12a that mesh with a bevel gear 10a provided on the pinion shaft 10 are provided at both ends of the connecting shaft. Therefore, the rotation of the pinion shaft 10 causes the worm wheel 11 to simultaneously rotate via the bevel gears 10a and 12a, and the support arm 8 moves up and down.

Next, a method of changing the rolling size of the guide according to the changing of the rolling size will be described. In order to change the size of the guide due to the change in the rolling size, it is necessary to extract the upper guide 4 and the lower guide 3 from the hole shape of the rolling roll. The guide is extracted from the guide base 5 (that is, moved to the left side in FIG. 2), and the front-rear adjustment bolt 3a of the lower guide 3 is rotated to extract the lower guide from the rest bar 2 (moved to the left side in FIG. 2). . For example, as shown in FIG. 1, an eyebolt 14 is provided on the upper portion of the rest bar 2, and the restbar is lifted by a crane using the eyebolt 14 and then the pin 7 connecting the support arm 8 and the guide base 5 is pulled out. , Rest bar rolling mill frame 1
The rest bar 2 is removed from the rolling mill frame 1 by pulling out the bolt 2a fixed to the. After removing the rest bar 2, the rolling roll R can be extracted from the rolling mill frame 1 and replaced with a rolling roll of a new rolling size. After the replacement of the rolling rolls, the rest bar 2 equipped with a new rolling size guide is attached to the rolling mill frame 1, the support arm 8 and the guide base 5 are connected by the pin 7, and then the hydraulic clamp 6 is released. The guide base is made movable up and down, and the input portion 10b of the pinion shaft provided in the gear box 9 is rotated there to align the vertical position of the upper guide 4 with the hole shape of the upper roll. Lower guide 3
When the rest bar 2 is brought into contact with and fixed to the positioning block 15 provided on the rolling mill frame 1, the upper guide 4 is automatically positioned in the vertical direction with respect to the lower roll.
After the vertical positioning of the guide is completed, the front and rear position adjusting bolts 3a, 3b, 4a, 4b are rotated to align the lower guide 3 and the upper guide 4 with the hole shape of the rolling roll R, and the guide is rolled. Complete the size exchange. To adjust the clearance of the guide along with the clearance adjustment of the rolling roll R, the hydraulic clamp 6 may be opened to make the guide base 5 movable up and down on the rest bar 2 when adjusting the clearance of the rolling roll. When the roll carrier 13 is moved up and down to adjust the clearance of the gear carrier, the gear box 9 fixed to the roll carrier moves up and down, so that the support arm 8 fitted to the eccentric shaft portion 11a of the worm wheel of the gear box is moved. The guide base 5 is moved up and down via the roll base 13 and is vertically adjusted with the same size as the rolling roll R held by the roll carrier 13 via the roll chock. Is completed. After the gap adjustment of the guide is completed, the guide base 5 is fixed to the rest bar 2 by the hydraulic clamp 6 so that the rolling can be restarted.

[0008]

EXAMPLE In the spacing adjusting device for a multi-row guide for a rolling mill in this example, the four corners of the rest bar 2 can be attached to and detached from the rolling mill frame 1 by four bolts 2a (only one bolt is shown in FIG. 1). The lower guide 3 and the upper guide 4 are detachably provided on the rest bar. The lower guide 3 is fitted to the rest bar 2 so as to be slidable in the front-rear direction (left-right direction in FIG. 2) and has three position adjusting bolts 3a.
The tip end of the lower guide can be brought into contact with and separated from the rolling roll R by rotating. The upper guide 4 is slidably fitted in a front-rear direction (left-right direction in FIG. 2) on a guide base 5 provided on the rest bar 2 so as to be vertically movable, and is rotated by rotating the position adjusting bolt 4a. The tip of the guide can be brought into contact with and separated from the rolling roll. The guide base 5 can be fixed to the rest bar 2 with a total of 80 tons of clamping force by four hydraulic cylinder-driven hydraulic clamps 6. The connecting portions 5a on both sides of the guide base 5 are connected to the lower ends of a pair of left and right long plate-shaped support arms 8 by pins 7. In FIG. 5, 8c is a square pin hole into which the pin 7 opened at the lower end of the support arm 8a is inserted. The upper end of the support arm 8 is supported by a gear box 9 fixed to a roll carrier 13 that is vertically movable in the rolling mill frame 1. The pinion 10c is inserted into the horizontally-long rectangular fitting hole 8b at the upper end of the support arm 8.
The eccentric shaft part 1 of the worm wheel 11 that is rotated by the rotation of the
1a is fitted through the eccentric piece 8a, and the reduction ratio of the pinion 10c and the worm wheel 11 is 1:30. As shown in FIGS. 4 to 6, the gear box 9 is rotatably provided with a pinion 10 c, and the pinion is meshed with the worm wheel 11. A bevel gear 10a is provided at one end of the pinion shaft 10, and an input unit 10b for rotating the pinion shaft is provided at the other end. The bevel gear 10a is meshed with bevel gears 12a provided at both ends of a connecting shaft 12 that connects a pair of gear boxes 9. The worm wheel 11 provided on the pair of left and right gear boxes 9 can be rotated by rotating the input portion 10b of either the left or right pinion. The worm wheel 11 is provided with an eccentric shaft portion 11a having an eccentric amount of 45 mm. The eccentric shaft portion 11a is located in the fitting hole 8b of the support arm 8 that is vertically movably fitted in the gear box 9, and is fitted to the eccentric piece 8a that is movably provided in the front-rear direction by 50 mm. Have been combined.

When one of the pair of gearboxes 9 is rotated, the left and right worm wheels 11 are simultaneously rotated because the left and right pinions 10c are connected by the connecting shaft 12. The eccentric shaft portion 11a fitted to the support arm 8 via the eccentric piece 8a rotates to adjust the position of the support arm in the vertical direction. The eccentric piece 8a moves forward and backward (left and right in FIG. 6) in the fitting hole 8b with the circular movement of the eccentric shaft portion 11a.

A method of changing the guides and a method of adjusting the rolling roll gap after the change of the guides when the size of the rolling mill is changed will be described. The eyebolt 14 provided on the rest bar 2 is used to lift it up by a crane (not shown) in the factory, and the rest bar 2 is fixed to the rolling mill frame 1 with four bolts 2a, a guide base 5, and a support. After removing the pin 7 connecting the arms 8, the rest bar 2 is removed from the rolling mill frame 1.

Next, the rolling roll R is removed from the rolling mill frame 1, a rolling roll R of a new rolling size is inserted into the rolling mill frame, and then the rest bar 2 to which a guide of the new rolling size is attached is rolled. The guide block 5 is mounted on a positioning block 15 provided on the frame for positioning, and after fixing with a mounting bolt 2a, the guide base 5 and the support arm 8 are connected by a pin 7. It is well known that the diameter of the rolling roll changes in order to modify when the hole shape wears,
Since the lower roll has a liner inserted under the chock and is always adjusted to the same height, there is no need to adjust the position of the lower guide 3 in the vertical direction. Since the distance D from the roll carrier to the roll hole shape changes according to the above, it is necessary to adjust the position of the upper guide 4 in the vertical direction according to the change in the distance D (FIG. 2). The vertical position of the upper guide 4 is adjusted by releasing the hydraulic clamp 6 and then rotating the input portion 10b of the pinion shaft 10 in accordance with the position of the rolling roll R to adjust the vertical position of the upper guide 4. After fixing the hydraulic clamp 6 to fix the guide base 5 to the rest bar 2, the position adjustment bolts 4a and 4b are used to adjust the position so that the tip of the upper guide 4 comes close to the rolling rolls and fix it. Similarly, if the lower guide 3 is also moved in the front-rear direction by the position adjusting bolts 3a and 3b to adjust its position so as to be close to the rolling rolls and fixed, the replacement work accompanying the change of the rolling size of the guides is completed. When finely adjusting the gap between the rolling rolls during rolling, or when changing the caliber among four calibers as shown in FIG. 1, it is sufficient to release the hydraulic clamp 6 and then adjust the gap between the rolling rolls. As the gap between the rolling rolls is adjusted, the gear box 9 fixed to the roll carrier 13 is vertically adjusted by the same amount as the adjustment amount of the rolling rolls, so that the upper guide 4 suspended from the gear box 4 is adjusted.
Since the gap adjustment is automatically performed, when the hydraulic clamp 6 is fixed, the adjustment of the rolling roll gap is completed.

[0012]

According to the present invention, since the rest bar incorporating the upper and lower guides can be attached to and detached from the rolling mill frame, it is not necessary to replace the guides each time the rolling size is changed, and it is possible to perform the work in a short time at a time. Therefore, it is possible to obtain the effect of shortening the down time of the rolling line and increasing the operation rate of the factory.

Further, even when the guides incorporated in the rolling mill frame are adjusted up and down according to the hole shape of the rolling roll, all the guides can be simultaneously and easily adjusted in position simply by rotating the connecting shaft.

[Brief description of drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is an enlarged plan view of the present invention.

FIG. 4 is a partially cutaway enlarged front view of a gear box.

FIG. 5 is a sectional view taken along the line AA of FIG.

6 is a right side view of FIG. 4 with a part thereof cut away.

[Explanation of symbols]

1 rolling mill frame 2 Rest bar 3 Lower guide 3a Position adjustment bolt 3b Position adjustment bolt 4 Upper guide 4a Position adjustment bolt 4b Position adjustment bolt 5 Guide base 5a connection part 6 hydraulic clamp 7 pin 8 support arms 8a Eccentric piece 8b Mating hole 9 gearbox 10 pinion shaft 10a bevel gear 10b Input section 10c pinion 11 warm wheels 11a Eccentric shaft 12 connecting shaft 12a bevel gear 13 roll carrier R rolling roll

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shoji Okada 13-12-12 cold, Nishi-ku, Sapporo-shi, Hokkaido Kotobuki factory, Kotobuki-ku, Kitakyushu, Kyushu No. 1 in the town Sumitomo Metal Industries Co., Ltd. Kokura Works (72) Inventor Hideki Suetsugu No. 1 Konomicho, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture Sumitomo Metal Industries Co., Ltd. Kokura Works (56) Bibliography 6-48907 (JP) , U) Actual Kaihei 6-15810 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 39/14 B21B 39/16 B21B 39/34

Claims (2)

(57) [Claims] 1. A guide base movably provided on a rest bar removably fixed to a rolling mill frame, a clamp for fixing the guide base to the rest bar, and a fitting to the rest bar. Yes, a lower guide that can be attached to and detached from the rolling roll, an upper guide that is fitted to the guide base and that can be attached to and detached from the rolling roll, and a vertical direction on both end sides of the guide base. And a pair of support arms arranged in the rolling mill, and a pair of gearboxes fixed to the roll carrier provided in the rolling mill frame and provided corresponding to the respective support arms, and each of the gearboxes. A pinion shaft that is rotatably supported, has an input unit on one end side, has a bevel gear on the other end side, and has a pinion between the bevel gear and the input unit; Pinionsha A worm wheel that is rotatably provided in the gear box, an eccentric shaft portion provided in each worm wheel, and is provided between the pair of gear boxes. An eccentric worm wheel provided on the pair of gearboxes corresponding to the upper ends of the pair of support arms, the connecting shaft having a bevel gear that meshes with a bevel gear provided on the pinion shaft. An interval adjusting device for a multi-row guide for a rolling mill, which is vertically movably fitted to a shaft portion, and has a lower end side detachably connected to the guide base via a pin. 2. A support arm is vertically movably inserted into a guide groove of a gear box, a fitting hole is formed in an upper portion of the support arm, and an eccentric shaft portion is movably fitted in the fitting hole. The multi-row guide spacing adjusting device for a rolling mill according to claim 1, wherein: