JPH0985344A - Variable roll equipment for wide flange beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the roll position adjusting work to change the size with a relatively simple structure, and to reduce the number of rolls and roll supporting members in a roll equipment such as press rolls and welding support rolls for manufacturing welded wide beam flanges. SOLUTION: A bracket 6 of a welding support roll 2 to guide and support a side face of a web member is connected to a bracket 5 of a press roll 1 to roll down an outer face of a flange of a wide beam flange, and when only the web height is changed, the welding support roll 2 is moved in an interlocking manner with the press roll 1. In addition, the welding support roll 2 is fitted to the bracket 6 through a U-shaped groove shim 9 for fine adjustment, a screw 10, a nut 11, etc., and the roll position is adjusted by the change of the flange thickness. When the wide flange beam is large, an intermediate roll is arranged between the upper and lower welding support rolls 2. A back-up roll 4 is arranged as necessary to prevent the deflection of the welding support roll 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable roll device capable of adjusting the position of a roll for guiding and supporting a flange material and a web material in accordance with various sizes of H-section steel in the production of welded H-section steel. is there. Further, it can also be applied to a rolling roll of a universal mill used in manufacturing a rolled H-section steel.

[0002]

2. Description of the Related Art Generally, a welding light weight H-section steel production line is constructed by arranging an uncoiler, a leveler, a high-frequency welding machine, a roller straightening machine, a cutting machine, etc. in order from the upstream side, as shown in FIG. , The upper and lower flange material F and the web material W unwound from the uncoiler are combined in an I-shape when viewed from the front by a pair of upper and lower pressure contact rolls 1 and 1 and a pair of left and right welding support rolls 2 and 2 installed at the welding machine position
After the joint between the flange material and the web material is heated by a high-frequency current, it is welded by electric resistance or the like while applying pressure by the pressure roller 1.

In such a welded lightweight H-section steel production line, H-section steel having a wide web height H of, for example, 75 to 450 mm is produced, and when the size is changed, the web is changed. It is necessary to change the position of the pressure contact roll 1 according to the height H and to make the supporting state by the welding support roll 2 proper. With respect to the welding support roll 2,
Conventionally, as shown in FIG. 9, the side surface of the web material W is supported by a plurality of welding support rolls 2, and these welding support rolls 2 themselves are replaced.

That is, each conventional welding support roll 2 is shown in FIG.
As shown in (b), a pair of upper and lower roll bodies 50,
It consists of a roll bracket 51 that supports the middle part,
Such a roll body 50 or roll bracket 5
1 is prepared in a plurality of sizes, and the roll main body 50 and its roll bracket 51 are combined for each H-shaped steel web height inside dimension H '(the web height H may change and the flange thickness may change) to be offline. Prepared in
When the size was changed (when the setup was changed), all the tips from the bracket plate 51a were changed.

[0005]

However, in the above-described conventional roll structure and roll changing method, the welding support roll and its roll bracket are replaced every time the size of the web height inside the H-section steel H'changes. Therefore, there were problems such as long resize time, low operating rate, and large inventory of welding support rolls and their roll brackets.

As a method for solving such a problem,
A method of moving the welding support roll 2 in accordance with the inner height H ′ of the web is conceivable. With regard to the roller straightening machine for shaped steel, a method based on such an idea is proposed as shown below.

(1) Japanese Unexamined Patent Publication (Kokai) No. 5-328 (Roller for straightening roller of variable width) As shown in FIG. 10 (a), from a fixed work roll 60 and a movable work roll 61 for pressing down the H-section steel web. In the straightening roller, the spacer 62 and the cylindrical pressing cylinder 63 are provided on both sides of the movable work roll 61.
The strokes of the two pressing cylinders 63 are moved by hydraulic control to adjust the gap between the rolls 60 and 61, that is, the roll width infinitely.

However, in the method using the hydraulic cylinder, the roll width can be changed only by the hydraulic operation, and the workability is improved, but the apparatus becomes complicated and the equipment cost is increased because the hydraulic pressure is used. I wonder if the width W can be controlled in units of ± 1 mm, because of its structure, it is not possible to support the middle part of the web,
There are problems such as.

(2) Japanese Unexamined Patent Publication No. 4-178217 (Roller Straightening Machine for Shaped Steel) As shown in FIG. 10 (b), between the straightening rollers 70 and 71 of the roller straightening machine, the outer circumference of the drive shaft 72 is provided. Sleeve 73
The ring spacer 74 having a multi-step tapered claw 74a and the ratchet wheel spacer 75 having a multi-step tapered claw 75a rotatably attached to the sleeve 73 are arranged so that the claw surfaces of both taper claws contact each other. The spacer width can be changed by rotating the ratchet wheel spacer 75 and shifting the claw surfaces in contact with each other. After the change, it is fixed by tightening the nut 76.

However, in the method using the tapered claw,
After rotating the ratchet wheel spacer, the roller must be fixed with a nut, which makes the roll width adjustment work cumbersome.
There is a problem that the lowering of the movability is unavoidable, and in this case as well, it is impossible to support the intermediate portion of the web.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to easily perform roll position adjustment work for size change in a short time with a relatively simple structure. It is an object of the present invention to provide a variable roll device of H-section steel that can be manufactured and can reduce the number of rolls and its supporting members.

[0012]

A variable roll device for H-section steel according to the present invention comprises a flange roll and a web roll, which abut against the outer surface of the flange material of the H-section steel and the side surface of the web material at the same position, respectively. Set the position of these rolls to H
In an H-shaped variable roll device that can be adjusted according to the height of a shaped steel web, as shown in FIG. 1, a flange roll (pressing roll 1) supporting member (pressing roll bracket 5) is provided in the vicinity of the flange material. The supporting member (welding support roll bracket 6) of the web roll (welding support roll 2) located is connected to enable the web roll to move in conjunction with the movement of the flange roll. Fine adjustment U-groove shim 9 for the support member
It is characterized in that the screw 10 and the nut 11, a double nut for fine adjustment, a hydraulic cylinder or the like are attached so that the position can be adjusted.

Here, the H-section steel web height H (H-section steel height inner dimension H ') becomes large, and with only a pair of web rolls (upper and lower pair of welding support rolls 2) located near the flange, When there is a problem in the web supporting ability, as shown in FIG. 2, an intermediate web roll (intermediate welding supporting roll 3) is prepared in advance, and this intermediate web roll is inserted into the pair of web rolls (up and down). A pair of welding support rolls 2)
Place it in between.

Further, since the web support rolls such as the welding support roll 2 and the intermediate welding support roll 3 usually have a cantilever type support structure, a backup roll 4 that comes into contact with these web rolls is provided. The backup rolls 4 are arranged in a pair in the advancing direction of the H-section steel so as to sandwich the web roll behind the web-shaped roll on the side opposite to the H-section steel (see FIG. 3). Needless to say, the backup roll 4 can be omitted when the web roll has a double-sided support structure.

[0015]

With the above construction, when the size of the H-section steel is changed, the flange thickness may not change and only the web height H may change, or the flange thickness may change. Only the former web height H is changed. When changing, when the flange roll such as the pressure contact roll 1 is moved by a motor jack or the like according to the changed web height, the web roll near the flange such as the welding support roll 2 also moves in conjunction with this. The size changing work can be performed in an extremely short time without changing the roll.

In the latter case where the flange thickness changes, the fine adjustment U-groove shim 9 is replaced, or the double nut is adjusted, and the flange material F and the welding support roll 2 are changed by the amount corresponding to the change in the flange thickness. The roll gap g between them is adjusted. Since the shims are simply inserted and removed, the size change work can be performed easily and in a short time, compared with the case of replacing the conventional roll and its bracket. Further, it is possible to cope with various sizes (inside the height of the web) by using only one kind of the web for the flange vicinity web such as the welding support roll 2 and the fine adjustment member such as the U groove shim 9 for fine adjustment. As described above, since it is not necessary to prepare rolls of various sizes according to the inner height of the web, the number of rolls held can be reduced.

If the height of the web after the change of the H-section steel becomes large and there is a problem in the web material supporting ability only with the web rolls near the flange, such as the pair of upper and lower welding support rolls 2, the intermediate welding support rolls are used. Rolls for intermediate webs such as 3 are provided to secure the web material supporting ability. Even in this case, the roll change work is only for the intermediate web roll,
The roll replacement work can be performed in a shorter time than the conventional case where all the rolls are replaced. In addition, the roll for the intermediate web uses a roll of the same size as the roll for the flange vicinity web, and this can be dealt with by arranging this in an appropriate number of sets. The number of rolls held can be reduced compared to the case where a large number of rolls and brackets are prepared. Furthermore, the bracket of the web roll can be reduced.

Even if the web supporting roll such as the welding supporting roll 2 or the intermediate welding supporting roll 3 has a cantilever type supporting structure,
By using the backup roll 4, bending of the roll can be suppressed and the web supporting ability can be secured. The present invention is not limited to the variable roll device for welded H-section steel, but can be applied to a rolling roll in a universal mill for roll-rolled H-section steel.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the drawings. This is an example applied to a pressure welding roll and a welding support roll at the position of a welding machine in a light-weight welded H-section steel production line, and FIG. 1 shows an example of a variable roll device for welded H-section steel according to the present invention. FIG. 2 shows the use of the apparatus of FIG. 1 for a large size welded H-section steel. FIG. 3 shows a cross section of FIG. 1 and FIG.
6 and 7 show various modifications of the variable roll device shown in FIG.

The variable roll device for welded H-section steel according to the present invention is installed at the position of the welder, and as shown in FIGS. 1 and 2, mainly, the outer surface of the upper and lower flange members F of the H-section steel is rolled down. And a pair of left and right welding support rolls 1 and 1 for guiding and supporting the side surfaces of the web W in the vicinity of the upper and lower flange members from the left and right sides in the same vertical plane as the pressure contact positions by the pressure contact rolls 1 and 1. , 2 and a pair of left and right intermediate welding support rolls 3, 3 arranged between the upper and lower welding support rolls 2, 2 when the web height inner dimension H ′ is large.
It consists of backup rolls 4 that back up rolls 2 and 3 on both the left and right sides of the H-section steel.

The lower pressure contact roll 1 of the pair of upper and lower pressure contact rolls 1, 1 is fixed to a base or the like via a pressure contact roll bracket 5, and the upper pressure contact roll 1 uses the pressure contact roll bracket 5 as a roll stand or the like. The guide is supported so that it can move up and down, and is moved up and down by the motor jack 8 or the like, so that even if the web height H is changed, it can be easily and quickly dealt with. The pressure roll 1 is a non-driving roll in which the roll body is attached to the roll shaft via an internal bearing.

The pair of left and right welding support rolls 2 and 2 have their welding support roll brackets 6 and 6 fixed to the side plates of the pressure contact roll bracket 5, respectively, and the upper welding support rolls 2 and 2 move up and down together with the upper pressure contact roll 1. Allow to move. Furthermore, a pair of upper and lower welding support rolls 2, 2
Is vertically movable by inserting the vertical roll shaft 2b into the insertion hole 6a of the welding support roll bracket 6, and has a U-shaped groove in a plan view between the welding support roll 2 and the welding support roll bracket 6. The roll gap g can be finely adjusted by inserting the fine adjustment U-groove shim 9 and screwing the fixing nut 11 onto the screw 10 at the tip of the vertical roll shaft 2b.

The intermediate welding support rolls 3, 3 are attached to an intermediate welding support roll bracket 7, and the bracket 7 is detachably attached to a mounting base 12 fixed to a roll stand or the like via bolts 13 (see FIG. 2). ). Also,
The intermediate welding support rolls 3 and 3 have roll bodies 3a of the same type (same dimensions) as the roll body 2a of the welding support roll 2 and, as shown in Table 1 below, the web height of the H-section steel. The number of sets used is changed according to the range of the inner dimension H '.

[0024]

[Table 1]

The intermediate welding support roll bracket 7 has a U-shape when viewed from the front, which supports the upper and lower ends of the vertical roll shaft 3b which rotatably supports the roll body 3a of the intermediate welding support roll 3. As shown in FIG. 4, a slider 7a is provided at the base of the bracket 7, and a slide groove 12a of the slider 7a and a locking member 12b for preventing the slider 7a from being detached are provided on the mounting base 12 for intermediate welding support. The vertical position of the roll bracket 7 can be adjusted steplessly. After the adjustment, the locking member 12b is fastened to the mounting base 12 with the bolts 13 to fix the racket 7 to the mounting base 12.

Since the above-mentioned welding support roll 2 and intermediate welding support roll 3 are supported in a cantilever manner, a backup roll 4 is provided behind them to prevent the welding support rolls 2 and 3 from bending. This backup roll 4
Has a length such that it can contact the rolls 2 and 3 at the maximum size shown in FIG. 2, and the upper and lower ends thereof are rotatably supported by the support brackets 14, and as shown in FIG. So that the rear side of the rolls 2 and 3 on the side opposite to the web can be pinched from both sides.

In the variable roll device having the above-described structure, when changing the size of the H-section steel, the movement of the roll is adjusted and the roll is partially changed as follows.

(1) From the state of FIG. 1, when the flange thickness does not change and only the web height H increases, the roll gap g is constant, so the U-groove shim 9 is left as it is and the upper pressure contact roll 1 Is raised by the motor jack 8.
In conjunction with this, the upper welding support rolls 3, 3 also rise,
The position of the welding roll 3 can be easily adjusted at the same time as the position of the press roll 1 is adjusted.

(2) In the above (1), when the flange thickness is changed, the roll gap g is also changed by the amount of the change in the flange thickness. Therefore, it is not possible to deal with it only by raising the welding support rolls 3 and 3 described above. After loosening the nut 11 for
The U-groove shim 9 for fine adjustment is replaced and the upper and lower roll gaps g
To adjust. The shim 9 can be inserted and removed from the lateral direction, and the position can be easily adjusted.

(3) There is a problem in terms of the supporting ability of the web material W in order to cope with all sizes with only the pair of upper and lower welding support rolls 2 and 2. If the changed size is large, the changed size is used. According to the adjustment (1) or (2), one pair or two pairs of left and right intermediate welding support rolls 3, 3 are arranged between the pair of upper and lower welding support rolls 2, 2.

The position of the intermediate welding support roll 3 is vertically adjusted so that the space between the rolls becomes appropriate.

The results of the actual size change described above are shown below. Regarding the device of the present invention and the conventional device, (a)
Shortened size change time, (b) Welded support rolls and brackets inventories were compared.

[0033]

[Table 2]

In operation results, the flange thickness was changed 22 times / month, the flange thickness was the same and the web height inside dimension H ′ was changed 6 times / month, and the setup change time was changed from 560 minutes / month to 15 times.
We were able to reduce the time to 4 minutes / month (△ 406 minutes / month).
That is, in the present invention, the size change time can be shortened by about 7 hours (the operating rate is improved by 1.6%), and the roll maintenance time of 7 hours offline can be eliminated.

(B) Stock compression of welding support roll brackets As shown in FIG. 5, the inventory of welding support rolls is 350P.
To 200P (Δ150P), which was about half that. It should be noted that the conventional welding support roll uses three types, and one type is commonly used in the present invention. In addition, the bracket inventory will change from 41P to 10P (△ 31P),
It could be reduced to about 1/4. We were able to reduce the total to about 1/2.

Next, as shown in FIG. 6A, a double nut 20 is used instead of the U-groove shim for fine adjustment of the upper and lower sides of the welding support roll 2. On the side surface of the pressure welding roll bracket 5, a plate-shaped welding support roll bracket 21 is provided so as to project,
A screw 22 provided on the vertical roll shaft of the welding support roll 2 is inserted into this bracket 21, and the bracket 21 is clamped from above and below by a double nut 20 to be fixed. The position of the welding support roll 2 can be finely adjusted only by rotating the double nut 20.

FIG. 6B shows the hydraulic cylinder 23.
It is an example of hydraulic control using. The plate-like welding support roll bracket 21 is provided with a vertical roll shaft 2b of the welding support roll 2.
And the actuating pieces 24 are attached to the upper and lower sides of the bracket 21 on the vertical roll shaft 2b, respectively, and the upper and lower actuating pieces 24 (vertical roll axis 2b) are respectively attached to the upper and lower surfaces of the bracket 21 with respective hydraulic cylinders 23.
Move up and down. Although the equipment cost is high, the position of the welding support roll 2 can be finely adjusted quickly and accurately.

FIG. 7A shows an example in which the screw 25 and the bracket 26 having a U-shape when viewed from the front are both-supported. The plate-shaped welding support roll bracket 21 and the upper end of the bracket 26 are finely fixed by a screw 25 and a nut 28 via a U-groove shim 27, and a vertical guide shaft 29 arranged at the rear of the roll is mounted on the bracket. The bracket 26 is movably guided and supported by being inserted through the bracket 26. The bracket 7 of the intermediate welding support roll 3 is also inserted into the guide shaft 29 to be guided and supported. In this case, the backup roll can be omitted.

FIG. 7 (b) shows an example in which a welding support roll bracket 21 having a substantially U-shape in front view is attached to the bracket base 5a of the pressure contact roll bracket 5. The upper portion of the bracket 21 is fixed to the bracket base 5a by welding or the like, the screw 30 is inserted into the lower portion, and the U-shaped groove shim 31 and the fixing nut 32 are used for fine adjustment. In this case,
Although the arm-shaped bracket 21 becomes long and the bending of the welding support roll 2 increases, there is an advantage that the maintenance work of the pressure contact roll 1 becomes easy.

In the above, the example applied to the production line of the lightweight welded H-section steel is shown, but not limited to this, the width of the horizontal roll of the universal mill in the production line of the roll-rolled (hot-rolled) H-section steel. It can be applied to variable. In this case, the horizontal roll that rolls down the web is divided into left and right parts, and the pair of left and right horizontal rolls are attached to the pair of left and right vertical rolls that roll down the flange via roll brackets, and the horizontal movement of the pair of left and right vertical rolls is performed. A pair of left and right horizontal rolls can be moved left and right in conjunction with, and fine adjustments can be made with shims.

[0041]

As described above, according to the present invention, the support member for the flange roll is connected to the support member for the web roll located in the vicinity of the flange material, and the web for the web is interlocked with the movement of the flange roll. Since the roll can be moved and the web roll is attached to the support member so that the position of the roll can be adjusted, the following effects can be obtained.

(1) When only the web height changes, the web roll near the flange moves together with the flange roll, and when the flange thickness changes, use a fine adjustment member such as a U-groove shim for fine adjustment. Fine adjustment is possible, size change can be performed very easily and in a short time, and the operating rate and production rate can be improved.

(2) Various sizes (inner dimensions of the web height) can be accommodated only by the web roll near the flange and the fine adjustment member. Since it is not necessary to prepare a large number of rolls of different sizes, it is possible to reduce the number of rolls held and reduce the equipment cost.

(3) When the height of the web after the change of the H-section steel becomes large, an intermediate web roll of the same size as the web roll near the flange can be arranged, and the web material supporting ability can be improved. Can be secured. Even in this case,
The roll changing work is performed only for the intermediate web roll, and the roll changing work can be performed in a shorter time than the conventional case where all the rolls are changed. Further, the number of rolls held and the number of roll brackets held can be reduced as compared with the conventional case where a large number of web rolls or brackets of a plurality of sizes are prepared.

(4) In the case where the web roll has a cantilever type support structure, by using the backup roll, bending of the roll can be suppressed and the web support ability can be easily secured.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view showing an example of a variable roll device for welded H-section steel according to the present invention, showing a state in which the web height of the H-section steel is relatively small.

FIG. 2 is a partial cross-sectional front view showing a state in which the intermediate welding support roll is assembled in the variable roll device of FIG.

3A is a cross-sectional view of FIG. 1, and FIG. 3B is a cross-sectional view of FIG.

FIG. 4 shows a mounting portion of an intermediate welding support roll (a).
Is a plan view and (b) is a front view.

FIG. 5 is a graph showing inventory compression of a welded support roll bracket of the present invention.

FIG. 6 is a front view showing a modified example (1) of the variable roll device of FIG. 1.

FIG. 7 is a front view showing a modified example (No. 2) of the variable roll device of FIG. 1.

8A is a side view and FIG. 8B is a cross-sectional view showing a welded portion in a welded H-section steel production line.

9 (a) is a front view and FIG. 9 (b) is a partially enlarged view showing a conventional welding H-section steel rolling device.

FIG. 10 is a sectional view showing a variable width roll in a conventional roller straightening machine.

[Explanation of symbols]

 1 ... Pressure welding roll 2 ... Welding support roll 3 ... Intermediate welding support roll 4 ... Backup roll 5 ... Pressure welding roll bracket 6 ... Welding support roll bracket 7 ... Intermediate welding support roll bracket 8 ... Motor jack 9 ... Fine adjustment U groove shim 10 … Screw 11… Fixing nut 12… Mounting base 13… Bolt 14… Support bracket

Claims (2)

[Claims] 1. A flange roll and a web roll that contact the outer surface of the flange of the H-section steel and the side surface of the web at the same position, respectively, and the positions of these rolls can be adjusted according to the height of the H-section steel web. In the variable roll device of H-section steel, by connecting the support member of the web roll located near the flange material to the support member of the flange roll, the web roll can be moved in conjunction with the movement of the flange roll. A variable roll device for H-section steel, wherein the web roll is attached to the support member so that the position of the roll can be adjusted. 2. The variable roll device for H-section steel according to claim 1, further comprising a backup roll that comes into contact with the roll for web.