JP2004114080A - Guide device for section steel rolling mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remarkably reduce the possessive number of guides, to impart guiding function of surely guiding a rolled stock into a rolling mill without having especially large-scale equipment and also to perform roll changing work of the rolling mill easily and quickly. <P>SOLUTION: This device is a guide device 10 for section steel rolling mills in which a work-side housing 14 and a drive-side housing 13 for pivotally supporting a set of rolling rolls are connected with an upper tie rod 17 and a lower tie rod 18 and supporting frames 34, 35 are provided between the upper tie rod 17 and the lower tie rod 18. An upper shaft 36 and a lower shaft 37 are horizontally provided above and below the supporting frames 34, 35 and upper guides 40, 41 which are divided in two in the directions of the work side and the drive side are provided on the upper shaft 36 so that the mounting interval in the width direction is adjustable by an upper adjusting means. Lower guides 42, 43 which are divided in two in the directions of the work side and the drive side are provided on the lower shaft 37 so that the mounting interval in the width direction is adjustable by a lower adjusting means. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a guide device for a section steel rolling mill which is disposed on at least one of the entry side and the exit side of a section steel rolling mill such as a universal rolling mill or an edger rolling mill and guides a rolling material to the rolling mill.
[0002]
[Prior art]
At least one of the entry side and the exit side of a section steel rolling mill such as a universal rolling mill and an edger rolling mill, the rolling material is mainly used to improve the dimensional accuracy of a product to be rolled. Is provided. In such a guide device, as a conventional technique for reliably guiding a rolling material to a rolling mill during rolling and performing a roll changing operation in the rolling mill simply and quickly, for example, Patent Document 1 shown below is disclosed. Is disclosed. The outline of this technology is that the guide body is directly attached to the roll chock, and is configured to be detachable from the housing by moving the guide body together with the working side housing so as to be off the rolling line of the rolling line, When changing the rolls, it is not necessary to remove the guide from the housing of the rolling mill as in the related art, and the change of rolls does not have to be performed.
On the other hand, as another conventional technique in a guide device for a section steel rolling mill, for example, Patent Documents 2 to 4 shown below and the like are disclosed.
The outline of these techniques is that the upper and lower guides divided into two are arranged in the housing of the rolling mill so that the mounting interval in the width direction thereof can be adjusted, and the arrangement interval of the upper and lower guides can be adjusted by the elevating means. Even if the size of the rolled material is variously changed by this configuration, rolling can be performed without replacing the guide each time.
[0003]
[Patent Document 1]
JP 10-272504 A [Patent Document 2]
JP-A-4-228216 [Patent Document 3]
JP-A-5-23725 [Patent Document 4]
Japanese Patent Publication No. 6-59497
[Problems to be solved by the invention]
However, the guide device disclosed in Japanese Patent Application Laid-Open No. 10-272504, which is the related art, has the following two major problems.
At present, there are 20 types of product sizes of the H-section steels to be rolled by the present invention. Here, since the conventional guide disclosed in Japanese Patent Application Laid-Open No. 10-272504 is of an integral shape, a dedicated guide is required for each size of the rolled material in order to roll all the above-mentioned types of H-beams. So you have to have 20 kinds of guides. For this reason, the initial cost and running cost of the equipment become enormous. In addition, each time the size is changed, the guide is attached to or detached from the roll chock, which requires time and effort for reassembly.
[0005]
The second problem is that the guide of the related art has a function of elevating and lowering the guide because it is fixed to the roll chock, but the shape is, as described above, an integral shape, and a widthwise direction. Does not have a guide adjustment function. For example, in actual rolling of an H-section steel, the flange width of a rolled material gradually changes for each pass through a plurality of rolling passes in the rolling mill. Therefore, a change in the gap occurs particularly between the rolled material and the guide.
In such a state, in the guide on the entry side of the rolling mill, the center of the rolled material is rolled out of alignment with the hole shape of the roll, so that the flange thickness becomes uneven, and the rolling resistance of the flange portion is reduced. The rolled material is bent due to the force imbalance, resulting in misroll. Further, even the guide on the delivery side of the rolling mill cannot correct the left and right bending of the rolled material.
[0006]
Further, the techniques disclosed in Japanese Patent Application Laid-Open Nos. Hei 4-228216, Hei 5-23725, and Hei 6-59497 have the following problems.
In the conventional guide device, the guide device is separately provided before and after the rolling mill, or is detachably provided in a housing or the like of the rolling mill. Therefore, when replacing the roll incorporated in the rolling mill, since the guide device interferes with the roll chock, it is necessary to retreat or remove the guide device each time, spending a lot of time when replacing the roll, and Min productivity decreases.
In view of the above-mentioned problems of the prior art, the present invention drastically reduces the number of guides held, and has a guide function for reliably guiding a rolling material to a rolling mill without having special large-scale equipment. It is an object of the present invention to provide a guide device for a shaped steel rolling mill that can easily and quickly perform a roll changing operation.
[0007]
[Means for Solving the Problems]
A guide device for a section steel rolling mill according to a first aspect of the present invention has a housing configuration in which a working-side housing and a driving-side housing that support a set of rolling rolls are connected by an upper tie rod and a lower tie rod. A guide device for a section steel rolling mill, wherein a support frame is provided between the upper tie rod and the lower tie rod, an upper shaft and a lower shaft are respectively provided horizontally above and below the support frame, and the upper shaft is driven with a working side. An upper guide divided into two in the lateral direction is provided so that the mounting interval in the width direction can be adjusted in width by the upper adjustment means, and a lower guide divided into two in the working side and the drive side is provided on the lower shaft in the width direction. Are provided so that the width can be adjusted by the lower adjustment means.
[0008]
The guide device for a shaped steel rolling mill according to a second invention is the guide device for a shaped steel rolling mill according to the first invention, wherein each of the upper shaft and the lower shaft is a rotatable eccentric shaft. , The gap between the upper guide and the lower guide can be adjusted.
The guide device for a section steel rolling mill according to a third invention is the guide apparatus for a section steel rolling mill according to the first and second inventions, wherein the upper adjustment means and the lower adjustment means have a right-hand thread part on one side. On the other hand, it has a feed rod having a left-hand thread and a rotary drive source for rotating the feed rod, and the feed rod is screwed to the upper and lower guides divided into two.
The guide device for a section steel rolling mill according to a fourth invention is the guide apparatus for a section steel rolling mill according to the first to third inventions, wherein the set of rolling rolls is a pair of upper and lower horizontal rolls, or upper and lower It consists of a pair of horizontal rolls and a pair of left and right vertical rolls.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described to provide an understanding of the present invention.
Here, FIG. 1 is a front view of a universal rolling mill incorporating a guide device for a section steel rolling mill according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 1, FIG. 4 is a partially enlarged view of a guide device for the same-shaped steel rolling mill as viewed from the front side, FIG. 5 is a cross-sectional view taken along a line CC in FIG. 4, and FIG. FIG. 7 is a plan view of a tandem roll stand group equipped with a guide device for the same-shaped steel mill, and FIG. 8 is a side view of a universal rolling mill using the guide device for the same-shaped steel mill at the time of roll replacement. Is shown.
[0010]
As shown in FIGS. 1 to 3, a universal rolling mill 11 provided with a guide device 10 for a section steel rolling mill according to an embodiment of the present invention includes a section steel to be rolled (in this embodiment, A drive-side housing 13 and a working-side housing 14 are provided on the right and left around the H-shaped steel 12). The front and rear housings 13 and 14 on the driving side and the working side are connected by two upper tie rods 17 and lower tie rods 18 with tie rod sleeves (collars) 15 and 16 attached to their middle portions, respectively. 17, the left and right housings 14 and 13 are tightly held in a pre-loaded state by a prestressed cylinder 19 (see FIG. 6) of a well-known structure provided on one side of the lower tie rod 18 to form one housing configuration. In this housing configuration, a pair of upper and lower horizontal rolls 20 and 21 (an example of a set of rolling rolls) having a well-known structure supported on both sides by bearings, and left and right vertical rolls 22 and 23 supported on bearings vertically ( The rolling and forming of the web and the flange of the shaped steel 12 are performed.
A drive means (not shown) of a well-known structure for driving a pair of upper and lower horizontal rolls 20 and 21 is provided on the side of the drive side housing 13.
[0011]
Housing wheels 24 to 27 are provided at lower positions of the housings 14 and 13 on the working side and the driving side, respectively, and a hydraulic cylinder 29 (see FIGS. 7 and 8) which is an example of a transport unit is provided. Thereby, the housings 13 and 14 can be moved between the rolling line 30 and the rolling roll exchange line 31 shown in FIG. In FIG. 1, reference numeral 32 denotes a movable trolley. Wheels 33 for the movable trolley are provided on the front, rear, left and right of the lower part of the movable trolley 32, and are rolled by driving means (not shown) in the same manner as the housings 13, 14. It is movable between the line 30 and the roll exchange line 31.
[0012]
The guide device 10 for a section steel rolling mill according to an embodiment of the present invention is provided in the universal rolling mill 11 having the above main configuration. The details will be described below with reference to FIGS. 4, 5 and 6.
In these figures, reference numerals 20 and 21 denote the horizontal rolls provided in the housings 13 and 14, and reference numerals 22 and 23 denote vertical rolls. By the two rolls 20, 21, 22, and 23, the section steel 12 as a rolled material is transported to another rolling mill (not shown) disposed before and after the universal rolling mill 11.
Support frames 34 and 35 are provided between a pair of upper and lower tie rods 17 and 18 provided before and after the housings 13 and 14, respectively, and the left and right support frames 34 and 35 and the support frames 34 and 35 are substantially The shape obtained by combining the upper and lower tie rod sleeves 15 and 16 which are connected to each other has a substantially rectangular shape when viewed from the front, and forms a space through which the shaped steel 12 is inserted in the center.
Fixing means 34a and 34b are provided before and after the housings 13 and 14, respectively, in order to securely fix the support frames 34 and 35 to the housings 13 and 14 (see FIG. 3). The fixing means 34a, 34b are well known and include wedge portions provided on the support frames 34, 35, and hydraulic cylinders 35a, 35b for moving a clamp wedge for pressing the wedge portions against the housings 13, 14. ing. By expanding and contracting the hydraulic cylinders 35a, 35b, the support frames 34, 35 can be fixed to or released from the housings 13, 14.
[0013]
The left and right pair of support frames 34 and 35 are supported by the support frames 34 and 35, and eccentric shafts 36 and 37, which are examples of an upper shaft and a lower shaft, are horizontally provided vertically. The eccentric shafts 36, 37 have eccentric portions 38, 39 (see FIG. 6) in which the inner portions are eccentric with respect to the axis of the portion supported by the support frames 34, 35, respectively. The eccentric portion 38 is provided with upper guides 40 and 41 divided into two in the working side and the drive side, and the eccentric portion 39 is provided with lower guides 42 and 43 divided into two in the working side and the drive side.
As shown in FIGS. 4 and 6, worm reducers 44 and 45 are provided on one side of the eccentric shafts 36 and 37, respectively. A worm wheel 46 and a worm 47 are provided inside the worm speed reducers 44 and 45. The worm speed reducers 44 and 45 are set in different rotation directions with respect to the input shafts of the same rotation, and drive the guide gap adjusting motor 47 a connected to the worm 47 so that the eccentric shafts 36 and 37 are mutually moved. By rotating in the opposite direction, the upper guides 40 and 41 attached to the eccentric portions 38 and 39 can be moved in the vertical direction, and the lower guides 42 and 43 can be moved in the lower and upper directions to adjust the distance therebetween.
[0014]
Opposite brackets 50 to 53 are provided on both ends of the eccentric portions 38 and 39 of the eccentric shafts 36 and 37, and the feed rods constituting a part of the upper adjustment means are provided on the brackets 50 and 51. Both ends of a screw shaft 54, which is an example of a feed rod constituting a part of the lower adjustment means, are supported at both ends of a screw shaft 54, which is an example of the above, and both ends of brackets 52, 53, respectively. Motor mounting seats 56, 57 are provided on one of the brackets 50, 52, respectively. The motor mounting seats 56, 57 are provided with adjusting motors 58, 59, which are examples of a rotary drive source for rotating the screw shafts 54, 55. Is provided. The screw shafts 54 and 55 have left and right threaded portions formed on the left and right, respectively, with reference to the center.
Strictly, the upper guides 40 and 41 are slidably fixed to the eccentric portion 38 via the mounting frames 60 and 61, and the lower guides 42 and 43 are slidably fixed to the eccentric portion 39 via the mounting frames 62 and 63. Fixed. The upper mounting frames 60 and 61 are provided with nut portions screwed to the left and right screw portions of the screw shaft 54 on the upper side, respectively, and are fixed to the mounting frames 60 and 62 by rotating the screw shaft 54. The distance between the upper guides 40 and 41 can be adjusted. In addition, the lower mounting frames 62 and 63 are also provided with nut portions to be screwed to the left and right thread portions of the lower screw shaft 55, respectively. The position can be adjusted by moving it closer or farther away. The above-described upper adjustment means includes brackets 50 and 51, a screw shaft 54, a motor mounting seat 56, an adjustment motor 58, and mounting frames 60 and 61 provided with nut portions. The means includes brackets 52 and 53, a screw shaft 55, a motor mounting seat 57, an adjusting motor 59, and mounting frames 62 and 63 having nut portions.
[0015]
The centers of the upper guides 40 and 41 and the lower guides 42 and 43 are provided on the center line m1 of the rolling line 30 symmetrically and are arranged in advance. Accordingly, by driving the adjustment motor 58, the upper guides 40 and 41 forming a pair move while maintaining the left and right distances at equal intervals around the center line m1, and the rotation of the adjustment motor 58 is stopped. Sometimes it is held in that position. In addition, by driving the adjustment motor 59, the lower guides 42 and 43 move while maintaining a constant distance from the center line m1, and are fixed and held at that position by stopping the adjustment motor 59.
On the other hand, since the vertical center positions of the upper guides 40 and 41 and the lower guides 42 and 43 are set in advance to the transport height level m2 of the shaped steel 12, that is, the intermediate position between the upper and lower horizontal rolls 20 and 21, By driving the guide gap adjusting motor 47a, the upper guides 40 and 41 and the lower guides 42 and 43 move up and down while maintaining the center position m2. When the rotation of the guide gap adjusting motor 47a is stopped, it is self-locked by the worm speed reducers 44 and 45 and fixed at that position. Even in this case, it is preferable to use a motor with a brake as the guide gap adjusting motor 47a, whereby the upper guides 40, 41 and the lower guides 42, 43 are securely locked at that position.
[0016]
In actual rolling of a section steel, that is, there are currently 20 types of H-section product sizes that are targeted by a rolling mill to which the guide apparatus 10 for a section steel rolling mill is applied. With only one type of horizontal roll and one type of vertical roll, it is difficult to roll all shaped steel, so it is necessary to replace rolling rolls according to the product size of the shaped steel. In addition, it is necessary to replace the rolling roll due to the wear or wear of the rolling roll. Hereinafter, a method of exchanging rolls of a rolling mill provided with the guide device 10 for a section steel rolling mill according to one embodiment of the present invention will be described below.
As shown in FIG. 7, a rough universal rolling mill 71, an edger rolling mill 72, and a finishing coarse universal rolling mill 73 are sequentially arranged along a rolling line 30 to constitute the tandem roll stand group 74. The rolling material reciprocates between the tandem roll stand groups 74 and is rolled into a predetermined shape. Each of the above-described rolling mills 71 to 73 is provided with a guide device 10 for a section steel rolling mill according to an embodiment of the present invention, and FIG. 7 shows a part of the configuration. Guides 40, 41 are shown. In FIG. 7, the upper side of the drawing shows the driving side of the rolling roll, and the lower side shows the working side.
[0017]
As described above, reference numeral 31 denotes a rolling roll exchange line for exchanging new and old rolling rolls off-line, and on the right side of the rolling roll exchange line 31, moving carts 75 to 75 on which new rolling rolls to be exchanged are previously loaded. A new rolling roll group 78 in which 77 stands by is formed. The moving carts 75 to 77 move left and right on the rail 79, and the old rolling rolls to be replaced when old rolling rolls to be replaced taken out of the rolling line 30 are stacked on the left side of the rolling roll replacement line 31. A roll group 80 is configured.
Next, an outline of a method of exchanging rolling rolls of a universal rolling mill 71 (same for 73) provided with a guide device 10 for a section steel rolling mill according to an embodiment of the present invention will be described with reference to FIGS. 8 and 7. I do.
As shown in FIG. 8, a solid line disposed around the rolling line 30 shows an overall view of the universal rolling mill 71 (similarly, 73) being rolled, and the drive-side housing 13 of the rolling mill 71 and the work. The side housing 14 is firmly held by the upper and lower tie rods 17 and 18 as described above, and by opening the upper and lower tie rods 17 and 18, the drive-side and working-side housings 13 and 14 are respectively moved. It has a structure that can be divided.
[0018]
In FIG. 8, reference numeral 31 denotes the above-described roll exchange line, reference numeral 81 denotes a retreat line, and a hydraulic cylinder 29 includes the work-side housing 14, the roll to be replaced, and the guide device 10 when the roll is replaced. It is a transport means for driving the old roll set to the retreat line 81 or a roll set including a newly replaced rolling roll and the guide device 10 and the working side housing 14 to the rolling line 30.
The procedure when the rolling at the position of the rolling line 30 indicated by the solid line is completed and the rolling roll is replaced will be described below.
[0019]
(1) First, the upper and lower tie rods 17 and 18 are loosened from the state of the rolling mill 71 indicated by the solid line, and a set of rolls to be replaced (horizontal rolls 20 and 21 and vertical rolls 22 and 23) are placed on the movable carriage 32. Then, a roll set 82 having upper guides 40 and 41 and lower guides 42 and 43 is placed.
(2) Next, the hydraulic cylinder 29 moves the roll set 82 and the working side housing 14 to the retreat line 81 once.
(3) Remove the old roll set 82 from the working side housing 14.
(4) The movable cart 32 is driven to move the old roll set 82 to the location of the old rolling roll group 80 shown in FIG. 7, and then the old roll set 82 is lowered from the movable cart 32 by, for example, a crane.
(5) The movable carriage 32 is moved to the position of the new rolling roll group 78 shown in FIG. 7, and a new roll set 82 in which a roll to be newly replaced at another place is previously mounted on the movable carriage 32. I do.
(6) A new roll set 82 is united with the retracted working side housing 14, and the combined unit is moved to the rolling line 30 by driving the hydraulic cylinder 29, and the two units are moved by the upper and lower tie rods 17 and 18. The housings 13 and 14 are tightened.
With the above (1) to (6), the exchange of the rolling roll is all completed.
[0020]
In the above-described embodiment, the exchange of the rolls in the rough and finish universal rolling mills 71 and 73 has been described. However, the roll exchange in the edger rolling mill 72 may be performed in the same manner as in the above-described universal rolling mill. Omitted.
In addition, the present invention is not limited to the above-described embodiments, and changes can be made without departing from the spirit of the present invention. For example, some or all of the above-described embodiments and modifications may be implemented. The case where the guide device for a section steel rolling mill of the present invention is configured in combination is also included in the scope of the present invention.
[0021]
【The invention's effect】
As is apparent from the above description, the guide device for a section steel rolling mill according to claims 1 to 4 has an upper shaft divided into two in the working side and the driving side direction on the upper shaft, and the mounting interval in the width direction thereof is set. The width adjustment is provided by the upper adjustment means, and the lower guide is further provided on the lower shaft with the lower guide divided into two in the working side and the drive side so that the widthwise mounting interval can be adjusted by the lower adjustment means. There is no need to prepare and replace a plurality of types of upper guides and lower guides according to the sizes of the plurality of types of shaped steel. Specifically, for example, in the case of an H-section steel having a height of 200 to 900 mm, only one type of the upper guide and the lower guide is required for 20 types of the conventional method, and it is possible to greatly reduce equipment cost.
Furthermore, even during rolling, the guide width can be adjusted for each rolling pass, so that the rolling material can always be guided stably.
In particular, in the guide device for a section rolling mill according to the second aspect, the upper shaft and the lower shaft can each be a rotatable eccentric shaft, and the gap between the upper guide and the lower guide can be adjusted by rotation of each eccentric shaft. Therefore, the means for raising and lowering the guide disclosed in Japanese Patent Application Laid-Open Nos. Hei 4-228216, Hei 5-23725, and Japanese Patent Publication No. Hei 6-59497 becomes unnecessary, and the apparatus is accordingly reduced. Is compact and easy to maintain.
[Brief description of the drawings]
FIG. 1 is a front view of a universal rolling mill incorporating a guide device for a section steel rolling mill according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along the line AA in FIG.
FIG. 3 is a sectional view taken along line BB in FIG. 1;
FIG. 4 is a partially enlarged view of a guide device for the same section rolling mill as viewed from the front side.
5 is a sectional view taken along the line CC in FIG. 4;
FIG. 6 is a plan view of FIG. 5;
FIG. 7 is a plan view of a tandem roll stand group equipped with a guide device for the same section rolling mill.
FIG. 8 is a side view of a universal rolling mill using the same section rolling mill guide device when a roll is replaced.
[Explanation of symbols]
10: guide device for section steel rolling mill, 11: universal rolling mill, 12: section steel, 13: drive side housing, 14: working side housing, 15, 16: tie rod sleeve, 17: upper tie rod, 18: lower tie rod, 19: prestressed cylinder, 20, 21: horizontal roll, 22, 23: vertical roll, 24-27: housing wheel, 29: hydraulic cylinder, 30: rolling line, 31: rolling roll exchange line, 32: moving carriage, 33: Wheel for mobile trolley, 34: Support frame, 34a, 34b: Fixing means, 35: Support frame, 35a, 35b: Hydraulic cylinder, 36, 37: Eccentric shaft, 38, 39: Eccentric part, 40, 41: Upper Guide, 42, 43: lower guide, 44, 45: worm reducer, 46: worm wheel, 47: worm, 47a: guide gap Adjusting motors, 48, 49: enlarged diameter portions at both ends, 50 to 53: bracket, 54, 55: screw shaft, 56, 57: motor mounting seat, 58, 59: adjusting motor, 60 to 63: mounting frame, 71 : Rough universal rolling mill, 72: edger rolling mill, 73: finishing coarse universal rolling mill, 74: tandem roll stand group, 75 to 77: movable carriage, 78: new rolling roll group, 79: rail, 80: old rolling roll Group, 81: Evacuation line, 82: Roll set

Claims (4)

A working device and a drive-side housing that support a set of rolling rolls are guide devices for a section steel rolling mill having a housing configuration connected by an upper tie rod and a lower tie rod,
A support frame is provided between the upper tie rod and the lower tie rod, and an upper shaft and a lower shaft are horizontally provided above and below the support frame, respectively.
An upper guide divided into two in the working side and the driving side direction is provided on the upper shaft such that the mounting interval in the width direction can be adjusted by the upper adjusting means,
Further, the lower shaft is provided with a lower guide which is divided into two in the working side and the driving side so that the width of the lower guide can be adjusted in width by lower side adjusting means. . The guide device for a section steel rolling mill according to claim 1, wherein the upper shaft and the lower shaft are each an eccentric shaft that can be rotated, and the gap between the upper guide and the lower guide can be adjusted by rotation of each of the eccentric shafts. A guide device for a section steel rolling mill, characterized in that: The guide device for a section steel rolling mill according to any one of claims 1 and 2, wherein the upper adjustment unit and the lower adjustment unit each include a feed rod having a right-hand thread portion and a left-hand thread portion on the other, And a rotary drive source for rotating the feed rod, wherein the feed rod is screwed to the upper and lower guides divided into two parts, respectively. The guide device for a shaped steel rolling mill according to any one of claims 1 to 3, wherein the set of rolling rolls is a pair of upper and lower horizontal rolls, or a combination of a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls. A guide device for a section steel rolling mill, comprising:

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