JP3048917B2 - Method and apparatus for preforming web material of welded H-section steel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for preforming a web material of a welded H-section steel. The present invention relates to a web material preforming method and apparatus.

[0002]

2. Description of the Related Art FIG. 7 shows an arrangement of a general production line for a welded H-section steel. In FIG. 7, (a) is a side view,
(B) is a cross-sectional view taken along the line AA of (a), in which 5 is a welded H-section steel (hereinafter also referred to simply as an H-section steel), 11 is a plate straightening machine, 12 is a flange material, and 13 is a web. 14 is a web material preforming device, 15 is a welding machine, 16 is a vertical straightening machine, and 17 is a horizontal straightening machine.

[0003] As shown in the figure, a web material 13 is conveyed from left to right in the figure, with the flange material 12 having a horizontal width on the upper and lower sides in a state of being set up vertically. Of the upper and lower flange materials 12 and the web material 13 corrected by the plate straightening machine 11, the flange material 12 is directly sent to the welding machine 15, but the web material 13 secures a strength equal to or higher than the base material at the welded joint. In order to increase the crimping area, that is, to process the upper and lower ends into a dog bone shape, it is sent to the web material preforming apparatus 14. Then, by the high frequency resistance heating in the welding machine 15, the upper and lower end portions of the web material 13 and the vicinity of the central portion of the width of the flange material 12 are
Welding is performed while heating to 1200-1350 ° C and pressing. The H-shaped steel 5 welded and formed into an I shape in this way is straightened and formed while passing through the vertical straightening machine 16 and the horizontal straightening machine 17 sequentially.

[0004] The problem in the above manufacturing process is that, as shown in the cross-sectional view of FIG. 8, when the web material 13 is preformed, the dog bone shape becomes one-sided (a), asymmetric (b), falling / buckling ( c) and the like. This turbulent shape makes the strength of the H-section steel unstable and impairs aesthetics, and is therefore abhorrent. In order to prevent the occurrence of such a turbulent shape, as shown in an explanatory view of the web material preforming process in FIG. The upper and lower ends are preformed by pressing down the upper and lower ends with the end pressing rolls 20 while restraining the deformation of the side portions by restricting by the part constraining rolls 21. However, if the product size (especially the web height) changes, ,
Role change work is required. Note that the side restraint roll
21 is near the end where metal flow occurs due to the effect of processing,
It is configured to be able to rotate independently of the central part without it.

However, due to the large number of product sizes, the frequency of this roll change operation is high and requires time and labor every time, which is one of the major factors hindering the improvement in the operation rate of the welded H-section steel production line. I have.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a welding H-shape capable of performing a roll changing operation in a web material preforming apparatus without reducing the operation rate of a welding H-section steel production line.
An object of the present invention is to provide a method and an apparatus for preforming a web material of a section steel.

[0007]

According to a first aspect of the present invention, there is provided a fixed roll cassette which can be installed and removed at a fixed position on a pass line on which a web material is preformed, and has an internal structure of the roll cassette. In such a way that the end pressing rolls and the side restraining rolls can be set in a roll set corresponding to various sizes of the product, and the roll change operation is performed in advance on the roll cassette offline, and the product is formed as needed. A method of preforming a web material of welded H-section steel, wherein a roll cassette set in a roll set corresponding to a size is installed and removed from the fixed position.

According to a second aspect of the present invention, there is provided a roll housing fixed at a fixed position on a pass line on which a web material is preformed, an installation / removal to / from the roll housing being free, and an end portion inside the roll housing. A fixed roll cassette capable of setting a pressing roll and a side restraining roll in a roll set corresponding to various sizes of a product, and a roller table for carrying the roll cassette to an installation position in the roll housing, the roll housing comprising: An apparatus for preforming a web material of welded H-section steel, comprising cassette fixing means for easily fixing a roll cassette to an installation position.

In the second aspect of the present invention, it is preferable that a caliber roll for adjusting the shape of the preformed end of the web material is further provided on the roll housing.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the first present invention (referred to as the method of the present invention) will be described. FIG. 1 is an explanatory diagram of the method of the present invention. In FIG. 1, 1 is a roll cassette, 100 is a fixed position on the pass line, and the same members as those in FIG. As shown in FIG. 1, the method of the present invention includes a fixed roll cassette 1 which can be installed and removed at a fixed position 100 on a pass line 30 where the web material 13 is preformed, and the internal structure of the roll cassette 1 So that the end pressing roll 20 and the side restraining roll 21 can be set in a roll set corresponding to various sizes of the product, and the roll change work is performed in advance on the roll cassette 1 offline. A method for preforming a web material of a welded H-section steel, wherein a roll cassette 1 already set in a roll set corresponding to a product size is installed and removed from the fixed position 100 as needed.

According to the method of the present invention, the roll change operation is performed in advance on the roll cassette 1 offline,
When changing the size of the web material, the roll cassette 1 already set in a roll set according to the size is installed at a fixed position 100 on the pass line 30 as needed. The roll cassette 1 is of a fixed type and can be freely installed and removed at a fixed position 100, so that the installation and removal work does not take much time. Therefore, pass line 30 for roll change
The occupation time is greatly reduced, and the operation rate of the line for preforming the web material of the welded H-section steel is remarkably improved as compared with the conventional case.

Next, the second present invention (referred to as a device of the present invention) will be described. 2 is a front view of the apparatus of the present invention, FIGS. 3, 4 and 5 are views taken along arrows AA, BB and CC in FIG. 2, respectively, and FIG. 6 is a view taken along DD in FIG. 2 to 6, reference numeral 2 denotes a roll housing, reference numeral 3 denotes a roller table, reference numeral 4 denotes cassette fixing means, and reference numerals 4A and 4B denote those which clamp the roll cassette inside the roll housing in a direction parallel to and perpendicular to the pass line. Is a vertical guide roll for guiding the side surfaces of the web material on the inlet side and the outlet side of the roll housing, 7 is a caliber roll, 8 is a roll joint of an end pressing roll, 9 is a rolling motor connected to the roll joint and omitted from the drawing. A coupling joint 50 for transmitting the driving force of the roller, 50 is a roll position adjusting hole, 51 is a caliber roll height adjusting handle, and 101 and 102 are center lines of an installation position and a standby position, respectively. The same members as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 2 to 6, the apparatus of the present invention comprises a roll housing 2 fixed at a fixed position on a pass line 30 on which a web material is preformed,
A fixed-type roll cassette 1 which can be freely attached to and detached from the inside and in which an end pressing roll 20 and a side restraining roll 21 can be set in a roll set corresponding to various sizes of a product, Roll housing 2
And a roller table 3 for carrying the roll cassette 2 to an installation position therein, wherein the roll housing 2 has cassette fixing means 4 for easily fixing the roll cassette 1 to the installation position in a detachable manner. Device.

The roll cassette 1 is of a fixed type, and can be easily transported to the installation position inside the roll housing 2 simply by pushing it on the roller table 3. The cassette fixing means 4 provided at a predetermined portion of the roll housing 2 is used. It can be fixed in that position by clamping from two directions perpendicular to each other. Since it is fixed by a clamp, removal is easy.

The roll cassette 1 is provided with roll position adjusting means in the height direction such as a roll position adjusting hole 50 shown in FIG. 3, and an appropriate space for holding a shim or the like for adjusting the interval between the left and right side restraining rolls 21. Therefore, it is possible to off-line assemble the end pressing roll 20 and the side restraining roll 21 in a roll assembling form corresponding to various product sizes.

Naturally, the roll cassette 1 is designed so that the roll assembly (roll arrangement) performed offline when the installation position is fixed is exactly overlapped with the appropriate roll arrangement position in the preforming position. After the cassette 1 is installed in the roll housing 2, the roll change is completed when the roll joint 8 of the end pressing roll 20 projecting from above and below the roll cassette 1 is fitted into the coupling joint 9 as shown in FIG. 6, for example. Put the material into a position where it can be passed.

Therefore, by providing the device of the present invention,
A roll cassette 1 in which a roll set of an end pressing roll 20 and a side restraining roll 21 corresponding to various product sizes is set in advance offline is prepared as a so-called "corresponding cassette" for each product size, and the product size is changed. In response to the change order, the corresponding cassette is
The method according to the present invention can be easily carried out in such a manner that the cassette corresponding to the preceding web material is removed from the installation position of the roll housing 2 at any time, and the subsequent cassette corresponding to the web material is fixed.

Although this embodiment discloses a case in which each of the end-side pressing rolls and the side restraining rolls set in the roll cassette 1 is a pair, it is possible that these pairs may be plural. Of course. In the device of the present invention,
It is preferable to further provide a caliber roll 7 for adjusting the shape of the end of the preformed web material on the roll housing 2. The height (roll interval) of the caliber roll 7 is determined by, for example, a caliber roll height adjusting handle 51 as shown in FIG.
It can be easily adjusted by providing.

As a result, the apparatus can be made more compact, and the displacement between the roll cassette 1 (the end pressing roll 20 and the side restraining roll 21) and the caliber roll 7 is less likely to occur. Disturbance in the end shape of the preformed web material is further reduced.

[0020]

[Example] Product size from 3.2 × 4.5 × 100 × 100 to 4.
2 to 6 (web thickness x flange thickness x web height x flange width; unit mm). Such an apparatus was provided, and the method of the present invention was implemented. Thirteen types of cassettes are available for each product size. As a result, the average line stoppage time due to the roll change was 3 minutes from 72 minutes in the past.
, And the occurrence rate of shape disorder at the end of the web material was sharply reduced to 1/8 to 1/10 of the conventional one.

[0021]

According to the present invention, there is a remarkable effect that the roll changing operation can be performed in the web material preforming apparatus without lowering the operation rate of the welding H-section steel production line.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the method of the present invention.

FIG. 2 is a front view of the device of the present invention.

FIG. 3 is a view taken in the direction of arrows AA in FIG. 2;

FIG. 4 is a view taken in the direction of arrows BB in FIG. 2;

FIG. 5 is a view taken in the direction of the arrow CC in FIG. 2;

FIG. 6 is a view as seen from the direction of the arrow DD in FIG. 3;

FIG. 7 is a layout view of a general production line for a welded H-section steel.

FIG. 8 is a cross-sectional view of a web material in a turbulent shape during preforming.

FIG. 9 is an explanatory diagram of a web material preforming process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll cassette 2 Roll housing 3 Roller table 4 Cassette fixing means 5 H-section steel (welded H-section steel) 6 Vertical guide roll 7 Caliber roll 8 Roll joint 9 Coupling joint 11 Plate straightening machine 12 Flange material 13 Web material 14 Web Material pre-forming device 15 Welding machine 16 Vertical straightening machine 17 Horizontal straightening machine 20 End reduction roll 21 Side restraining roll 30 Pass line 50 Roll position adjustment hole 51 Caliber roll height adjustment handle 100 Fixed position on pass line 101 Installation position Centerline of 102 Centerline of standby position

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-122702 (JP, A) JP-A-63-101005 (JP, A) JP-A-63-5802 (JP, A) JP-A-61-122 33702 (JP, A) JP-A-5-200403 (JP, A) JP-A-63-309312 (JP, A) JP-A-61-150703 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 31/08 B21B 1/08 B21B 13/10 B23K 11/36

Claims (3)

(57) [Claims] 1. A fixed roll cassette which can be installed and removed at a fixed position on a pass line on which a web material is preformed is formed, and the internal structure of the roll cassette is formed by an end pressing roll and a side restraining roll. Can be set in a roll set corresponding to various product sizes, roll change work is performed in advance on the roll cassette offline, and the roll set to a roll set corresponding to the product size at any time A method for preforming a web material of a welded H-section steel, wherein the cassette is installed and removed from the fixed position. 2. A roll housing fixed at a fixed position on a pass line on which a web material is preformed, a roll housing which can be freely installed and removed from the roll housing, and has an end pressing roll and side portions inside. A fixed roll cassette capable of setting a constraining roll in a roll set corresponding to various sizes of a product, and a roller table for transporting the roll cassette to an installation position in the roll housing, wherein the roll housing positions the roll cassette at an installation position. An apparatus for preforming a welded H-section steel web material, comprising a cassette fixing means for easily fixing to and removing from a web. 3. The apparatus for preforming a welded H-section steel web material according to claim 2, wherein a caliber roll for adjusting the shape of the preformed web material end is further provided in the roll housing.