JP2006136936A - Cluster type rolling mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cluster type rolling mill with which bending stress which acts on intermediate rolls is easily adjusted to not larger than the allowable bending stress. <P>SOLUTION: This cluster type rolling mill is provided with intermediate roll journal boxes 8 for commonly pivotally supporting both end parts of a first intermediate roll 3 and a second intermediate roll 4, the whole back-up roll journal boxes 9 for commonly pivotally supporting both end parts of a first back-up roll 5 and a second back-up roll 6, central back-up roll journal boxes 15 which are fixed to this whole back-up roll journal boxes 9 so that the relative position in the vertical direction to this whole journal box can be adjusted and with which both end parts of the central back-up roll 7 are pivotally supported, load detectors 38 for detecting loads which act on the central back-up roll journal boxes 15 and a position adjusting mechanism 30 for adjusting the relative position of the central back-up roll journal boxes 15. The relative position of the central back-up roll journal boxes is adjusted so that the bending stress which acts on the first intermediate roll and the second intermediate roll is within a prescribed range on the basis of the detected values by the load detectors. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cluster type rolling mill for manufacturing a thin plate.

  Conventionally, for example, in a rolling apparatus that rolls into a thin plate of about 0.1 to 0.2 mm, an apparatus having a normal rolling roll that rolls up to about 1 mm requires an excessive reduction force. The cluster type rolling mill having the multistage structure used is used. For example, Patent Document 1 below discloses a 12-stage cluster rolling mill.

  FIG. 7 is a diagram showing a configuration of the “multi-high rolling mill” of Patent Document 1. As shown in FIG. As shown in the figure, this rolling mill includes a pair of work rolls 52, a first intermediate roll 53 and a second intermediate roll 54 provided behind each of the work rolls 52, and the first intermediate roll. 53, a first holding roll 55 provided behind 53, a second holding roll 56 provided behind the second intermediate roll 54, and a center provided behind the first intermediate roll 53 and the second intermediate roll 54. The backup roll 57, the intermediate roll axle box 58 that supports the first intermediate roll 53 and the second intermediate roll 54 in common, and the first backup roll 55, the second backup roll 56, and the central backup roll 57 are supported in common. And a reserving roll axle box 59. A square opening 59a is provided at the center of the holding roll shaft box 59, and the central holding roll shaft box 60 is fitted in the opening 59a so as to be slidable in the vertical direction. A reduction cylinder 61 is provided. Reference numeral 62 denotes an upper reserving roll reduction cylinder, and reference numeral 63 denotes a load cell.

  With such a configuration, by rolling down the upper reserving roll reduction cylinder 61, a reduction force is applied to each of the rolls 52, 53, 54, 55, 56, and the material to be rolled 51 is sandwiched between the work rolls 52 and rolled. Can do. Further, the first and second intermediate rolls 53 and 54 are pivotally supported by a common axle box without using a so-called split support roll, and the first, second and central stay rolls 55, 56 and 57 are shared by a common axis. Operation and maintenance is made easy by adopting a structure that is supported by a box.

JP 2000-210705 A

  FIG. 8 is a schematic diagram showing an arrangement state of each roll of such a cluster rolling mill. As shown in FIG. 8 (A), each roll is preferably arranged so that the axis of each roll is on a straight line a. However, the first intermediate roll 53 and the second intermediate roll 54 are provided as a backup roll 55, In order to prevent shifting to the material 51 side due to the rolling force from 56, 57, etc., as shown in FIG. In order to maintain this position, it is squeezed in the vertical direction by the central stay roll 57.

  However, each roll needs to be polished and cut periodically as it is used. When each roll is reduced in diameter with this cut and ∠ABD and ∠ACE in the figure change, the first intermediate roll 53 is rolled during rolling. And the load of the BF direction in the figure which acts on the 2nd intermediate | middle roll 54 and CF direction changes significantly. For this reason, a stress greater than the allowable bending stress may act on the first intermediate roll 53 and the second intermediate roll 54. In such a case, it is conceivable that the appropriate positions of the first intermediate roll 53 and the second intermediate roll 54 are calculated geometrically based on the roll diameter of each roll, and the position adjustment is performed based on this. Geometric calculations are cumbersome and lack practicality.

  The present invention has been made in view of such problems. That is, an object of the present invention is to provide a cluster type rolling mill capable of easily adjusting the bending stress acting on the intermediate roll to be equal to or less than the allowable bending stress.

  In order to achieve the above object, a cluster type rolling mill of the present invention includes a pair of upper and lower work rolls, an intermediate roll that is in close contact with the upper and lower sides of the work roll, and a backup roll that is in close contact with the upper and lower sides of the intermediate roll. The intermediate roll is composed of a first intermediate roll that is in close contact with the work roll from the front oblique direction and a second intermediate roll that is in close contact with the work roll from the rear oblique direction, and the backup roll is obliquely forward with respect to the first intermediate roll. Cluster-type rolling comprising a first backup roll that is in close contact with the direction, a second backup roll that is in close contact with the second intermediate roll from the rear oblique direction, and a central backup roll that is in close contact with both the first intermediate roll and the second intermediate roll An intermediate roll axle box that supports both ends of the first intermediate roll and the second intermediate roll in common, and the first backup roll and the second backup roll. The stand roll entire shaft box that pivotally supports both ends of the handle, and the stand roll overall pivot box is fixed so that the relative position in the vertical direction with respect to the box box can be adjusted. A central stand roll roll box, a load detector for detecting a load acting on the central stand roll roll box, and a position adjusting mechanism for adjusting the relative position of the central stand roll roll box, and the central stand roll The relative position of the axle box is adjusted based on a value detected by the load detector so that bending stress acting on the first intermediate roll and the second intermediate roll is within a predetermined range. (Claim 1).

  According to the present invention, the load acting on the central stay roll shaft box is detected by the load detector, the bending stress acting on the intermediate roll is estimated based on the detected value, and this bending stress is less than the allowable bending stress. As described above, the position adjustment mechanism adjusts the vertical position of the central roll roll axle box with respect to the entire roll roll axle box, so that the bending stress acting on the intermediate roll can be easily adjusted regardless of complicated geometric calculations. It can be adjusted within an allowable range.

  Also, in the present invention, preferably, the position adjusting mechanism is a pair of slides that are interposed between the overall roll box box and the central roll roll box on both sides and slide in a horizontal direction perpendicular to the pass line. The pair of wedge members has a tapered surface inclined so as to displace the central retainer roll axle box in the vertical direction relative to the entire retainer roll axle box by sliding the wedge member. (Claim 2).

  According to such a configuration, the center retainer roll axle box can be displaced in the vertical direction by sliding the wedge member. Therefore, the position adjustment mechanism can be configured easily. In other words, for example, when the hydraulic cylinder is built between the entire roll roll box and the central roll box box to form the position adjustment mechanism, the equipment and piping are arranged in a complicated manner in the apparatus. It is expected that it becomes difficult to take out the roll at the time of replacement, and that inconveniences that it is often extremely inconvenient for handling in a roll shop (working place for polishing the roll) are expected. In contrast, in the present invention, since the position is mechanically adjusted by the wedge mechanism, roll replacement and handling at a roll shop are much easier and more convenient than when a hydraulic cylinder is used. ing.

  In the present invention, preferably, the position adjusting mechanism has a rotating rod that penetrates and is screwed into both of the pair of wedge members, and the tapered surfaces of the pair of wedge members are formed to be inclined opposite to each other. The pair of wedge members are moved closer to or away from each other by the rotation of the rotating rod, thereby displacing the relative position of the central retainer roll axle box.

  According to this configuration, by rotating the rotating rod, the pair of wedge members can be operated at the same time, so that the position adjustment of the central holding roll axle boxes on both sides can be performed with a good balance.

  As described above, according to the cluster type rolling mill of the present invention, excellent effects such as being able to easily adjust the bending stress acting on the intermediate roll below the allowable bending stress can be obtained.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. In each figure, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a perspective view of a cluster type rolling mill according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the cluster type rolling mill of FIG. As shown in FIG. 1 and FIG. 2, this cluster type rolling mill 10 includes a pair of upper and lower work rolls 2 arranged with a material 1 to be rolled 1 in between, and a first intermediate roll that is in close contact with the work roll 2 from an oblique front direction. 3, a second intermediate roll 4 that is in close contact with the work roll 2 from the oblique rear direction, a first backup roll 5 that is in close contact with the first intermediate roll 3 from the oblique front direction, and a close contact with the second intermediate roll 4 from the oblique rear direction The second backup roll 6 and the central backup roll 7 in close contact with both the first intermediate roll 3 and the second intermediate roll 4.

  The first intermediate roll 3 and the second intermediate roll 4 are pivotally supported by a common intermediate roll axle box 8 at both ends, and the first auxiliary roll 5 and the second auxiliary roll 6 are also common at both ends. It is supported by a box 9. A square opening 9a is provided at the center of the reserved roll axle box 9, and a central reserved roll axle box 15 that supports the central reserved roll 7 from both sides in the axial direction is fitted into the opening 9a. The central stand roll shaft box 15 is fixed so that the relative position in the vertical direction with respect to the stand roll whole shaft box 9 is adjustable, and the relative position is adjusted by the position adjusting mechanism 30. The position adjusting mechanism 30 is provided in each of the upper and lower stay roll whole axle boxes 9. The upper and lower reserved roll entire shaft boxes 9 are housed in a frame 19, and the upper reserved roll entire shaft box 9 is slidably fitted to the frame 19.

  On the front side and the rear side between the upper and lower holding roll whole shaft box 9, a shaft box lifting cylinder 17 for pushing up the upper holding roll whole shaft box 9 is provided. A bending cylinder 18 is provided on the front side and the rear side between the upper and lower intermediate roll axle boxes 8 to apply a bending moment to the first intermediate roll and the second intermediate roll.

  As shown in FIG. 2, a roll reduction cylinder 22 is provided on the upper holding roll overall shaft box 9 with a main load cell 21 interposed therebetween. A rolling force is applied to the rolls 2, 3, 4, 5 and 6.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. As shown in the figure, the position adjusting mechanism 30 has a pair of wedge members 31 and a rotating rod 32. The wedge members 31 are respectively disposed between the upper and lower reserve roll shaft boxes 9 and the central stand roll shaft box 15 and slide in a horizontal direction perpendicular to the pass line (perpendicular to the paper surface). It is supposed to be. The wedge member 31 is formed with a tapered surface 31a that is inclined so as to displace the central retainer roll axle box 15 relative to the retainer roll overall axle box 9 in the vertical direction as the wedge member 31 slides. . Further, as shown in this figure, the tapered surfaces 31a of the pair of wedge members 31 are reversely inclined to each other.

  The rotating rod 32 includes a pair of rods 33, 33 connected by a coupling attachment / detachment coupling 39. The rotating rod 32 penetrates and is screwed into both of the pair of wedge members 31 and is screwed into the respective wedge members 31. Is a reverse screw with respect to the other screw portion. Further, the rotation rod 32 is restrained from moving in the axial direction by the restraint fitting 35. Thereby, each wedge member 31 can be made to approach or separate by rotating the rotating rod 32.

  One end (the left end in the figure) of the rotating rod 32 is connected to a handle 36 that is rotatably provided so as to pass through the entire roll box 9 and the rotating rod 32 can be rotated by operating the handle 36. it can. The coupling attachment / detachment coupling 39 couples the pair of rods 33 and 33 so as not to rotate with each other, and can finely adjust the coupling position of the rods. As a result, with the coupling attachment / detachment coupling 39 removed, the left and right rods can be rotated to adjust the load balance of the left and right central retainer roll axle boxes 15, and the left and right rods can be coupled at that position. The load balance of the left and right central holding roll axle boxes 15 can be adjusted easily and accurately.

  A cylindrical tapered block 37 having a tapered surface corresponding to the tapered surface 31a of the wedge member 31 is disposed between the wedge member 31 and the central holding roll axle box 15, and the wedge member 31 slides. Is displaced up and down. Further, a sub load cell 38 is disposed as a load detector between the tapered block 37 and the central holding roll axle box 15. The sub load cell 38 detects a load acting on the central holding roll axle box 15, and the detected value is displayed on a display unit (not shown).

  4 is a cross-sectional view taken along line BB in FIG. As shown in the figure, the central reserve roll axle box 15 is fixed to the entire reserve roll axle box 9 by an axle box fixing mechanism 40. The axle box fixing mechanism 40 is formed on the outer side of the retainer roll whole shaft box 9 and two elongated bolts 42 having one end connected to the center retainer roll axle box 15 and penetrating the entire retainer roll axle box 9 in the vertical direction. The groove portion 9b includes a nut 43a and an auxiliary nut 43b that are screwed into the bolt 42. Thereby, when adjusting the position of the center retainer roll axle box 15 to be described later, the nut 43a and the auxiliary nut 43b are loosened so that the center retainer roll can be moved in the vertical direction, and when the position adjustment is not performed, the nut 43a. And the auxiliary nut 43b is tightened to fix the position firmly. The auxiliary nut 43b functions as a nut for preventing rotation of the nut 43a.

  FIG. 5 is a cross-sectional view showing another embodiment of the axle box fixing mechanism 40. The shaft box fixing mechanism 40 in FIG. 5 is different from the shaft box fixing mechanism 40 in FIG. 4 in that the nut 43a is not fastened directly to the groove portion 9b but is fastened through a spring 44. Reference numeral 45 is a seat interposed between the spring 44 and the nut 43a. With such a configuration, the central holding roll axle box 15 can be fixed to the entire holding roll axle box 9 with a constant urging force, so that play between members can be eliminated. Further, when adjusting the position of the center retainer roll axle box 15 to be described later, the fixing position is adjusted by the expansion and contraction of the spring, so that the nut 43a and the auxiliary nut 43b are loosened like the axle box fixing mechanism 40 of FIG. There is no need to tighten or tighten.

  FIG. 6 is a view for explaining the positional displacement of the central holding roll axle box 15 due to the sliding of the wedge member 31. This figure shows the relationship between the upper position adjustment mechanism 30 and the central holding roll axle box 15. As shown in FIG. 6 (A), when the handle 36 is operated and the rotating rod 32 is rotated to slide the pair of wedge members 31 toward each other, the tapered block 37 is moved downward, and the central holding roll The axle box 15 can be moved downward. On the other hand, as shown in FIG. 6B, when the handle 36 is operated and the rotating rod 32 is rotated to slide the pair of wedge members 31 away from each other, the tapered block 37 is moved upward, The central stand roll axle box 15 can be moved upward.

  Next, it is necessary to adjust the position so that the bending stress acting on the first intermediate roll 3 and the second intermediate roll 4 is equal to or less than the allowable bending stress as each roll is reduced in diameter by polishing and reshaping of each roll. A case where the above occurs will be described. When the load acting on the central holding roll axle box 15 is detected by the sub load cell 38, the detected value is displayed on a display unit (not shown). Since this load is a load that the central holding roll 7 receives from the first intermediate roll 3 and the second intermediate roll 4, the bending stress acting on the first intermediate roll 3 and the second intermediate roll 4 is estimated based on this load. be able to. Accordingly, the position adjusting mechanism 30 described above allows the first intermediate roll 3 and the first intermediate roll 3 to be adjusted so that the bending stress acting on the first intermediate roll 3 and the second intermediate roll 4 is equal to or lower than the allowable bending stress while looking at the detected value. What is necessary is just to adjust the position of the center holding | maintenance roll 7 which rolls down 2 intermediate | middle rolls 4.

  As described above, according to the present invention, the load acting on the central backup roll axle box 15 is detected by the load detector (sub load cell 38), and based on the detected value, the overall backup roll axle box of the central reserve roll axle box 15 is detected. Since the position adjustment mechanism 30 adjusts the relative position in the vertical direction with respect to 9, the bending stress acting on the first intermediate roll 3 and the second intermediate roll 4 can be easily within an allowable range regardless of complicated geometric calculation. The effect that it can be adjusted to is obtained.

  Also. By sliding the wedge member 31, the central retainer roll axle box 15 can be displaced in the vertical direction, whereby the position of the central retainer roll 7 can be adjusted, so that the position adjusting mechanism 30 can be configured easily. In other words, since the present invention mechanically adjusts the position by the wedge mechanism, roll replacement and handling at the roll shop are much easier and more convenient than when a hydraulic cylinder is employed. . In addition, since the pair of wedge members 31 can be operated simultaneously by rotating the rotating rod 32, the position adjustment of the central central roll roll box 15 on both sides can be performed with a good balance. That is, the bending stress acting on the first intermediate roll 3 and the second intermediate roll 4 can be easily adjusted to be equal to or less than the allowable bending stress.

  In the above-described embodiment of the present invention, the pair of wedge members 3 are arranged such that the tapered surfaces 31a face each other, but conversely, the tapered surfaces 31a may be arranged so that they face each other. In addition, the tapered surfaces 31a are opposite to each other. However, the tapered surfaces 31a may be inclined in the same direction. In this case, the screw portions at both ends of the rotating rod 32 are set in the same direction, and the rotating rod 32 is rotated. The pair of wedge members 3 are moved in the same direction.

  In the above-described embodiment, the handle 36 is connected to the rotating rod 32 and manually rotated. However, as another embodiment, the rotating rod 32 may be driven by a drive motor. In this case, a control unit that controls the drive motor may be provided so that the bending stress acting on the first and second intermediate rolls is less than or equal to the allowable bending stress based on the detection value of the sub load cell 38. .

  In addition, the technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

It is a perspective view which shows embodiment of this invention. It is sectional drawing which shows embodiment of this invention. It is AA sectional drawing of FIG. FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3, illustrating a configuration of a shaft box fixing mechanism. It is a figure which shows another embodiment of a shaft box fixing mechanism. It is a figure explaining operation | movement of a position adjustment mechanism. 2 is a cross-sectional view of a “multi-high rolling mill” in Patent Document 1. FIG. It is a figure which shows arrangement | positioning of each roll of the rolling mill of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll material 2 Work roll 3 1st intermediate roll 4 2nd intermediate roll 5 1st backup roll 6 2nd backup roll 7 Center backup roll 8 Intermediate roll axle box 9 Reserve roll whole axle box 9a Opening 9b Groove part 10 Cluster type rolling Machine 15 Central stand roll axle box 17 Axle box push-up cylinder 18 Bending cylinder 19 Frame 21 Main load cell 22 Roll reduction cylinder 30 Position adjustment mechanism 31 Wedge member 31a Tapered surface 32 Rotating rod 33 Rod 35 Restraint bracket 36 Handle 37 Tapered block 38 Load Detector (sub load cell)
39 Connecting / Removing Coupling 40 Shaft Box Fixing Mechanism 42 Bolt 43a Nut 43b Auxiliary Nut 44 Spring 45 Receiving Seat

Claims (3)

A pair of upper and lower work rolls, an intermediate roll that is in close contact with the upper and lower sides of the work roll, and a backup roll that is in close contact with the upper and lower sides of the intermediate roll. 1 intermediate roll and a 2nd intermediate roll closely_contact | adhered to a work roll from back diagonal direction, The said backup roll is back to the 1st reverse roll closely_contact | adhered to a 1st intermediate roll from the front diagonal direction, and 2nd intermediate roll A cluster-type rolling mill comprising a second holding roll in close contact from an oblique direction and a central holding roll in close contact with both the first intermediate roll and the second intermediate roll,
An intermediate roll axle box that pivotally supports both ends of the first intermediate roll and the second intermediate roll; and an entire axle roll axle box that pivotally supports both ends of the first and second backup rolls. The central storage roll shaft box is fixed to the overall storage box so that the relative position in the vertical direction relative to the storage box can be adjusted, and the central storage roll shaft box that supports both ends of the central storage roll and the central storage roll shaft box. A load detector for detecting a load, and a position adjusting mechanism for adjusting the relative position of the central stay roll axle box,
The relative position of the central stand roll axle box is adjusted based on the detection value by the load detector so that the bending stress acting on the first intermediate roll and the second intermediate roll is within a predetermined range. A cluster type rolling mill characterized by that.   The position adjusting mechanism includes a pair of wedge members that are interposed between the entire roll box box and the central roll box box on both sides and slide in a horizontal direction perpendicular to the pass line, and the pair of wedge members Is formed with a tapered surface that is inclined so as to displace the central retainer roll axle box in the vertical direction relative to the entire retainer roll axle box by sliding the wedge member. The cluster type rolling mill according to claim 1.   The position adjusting mechanism has a rotating rod that penetrates and is screwed into both of the pair of wedge members, and the tapered surfaces of the pair of wedge members are formed in opposite inclinations, and the rotation of the rotating rod causes the rotation of the rotating rod. The cluster type rolling mill according to claim 2, wherein the relative position of the central storage roll axle box is displaced by moving a pair of wedge members close to or apart from each other.

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