JPH0716708B2 - H-section steel straightness straightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Objects of the Invention> Industrial field of use The present invention relates to a flange squareness straightening device for H-section steel, and more particularly, to H after rolling without depending on the sensitivity of a conventional operator. The present invention relates to a straightening device because the squareness of a flange of a shaped steel can be quickly and accurately straightened.

2. Description of the Related Art Generally, H-section steel is hot-formed by a universal mill that is coaxially provided with upper and lower horizontal rolls and vertical rolls. The hot-formed H-section steel is cooled after rolling, and warpage that occurs during cooling is generated. The bend is corrected by a roller straightener.

However, since the upper and lower horizontal rolls are loosened or elastically deformed during rolling, the flanges may have different thicknesses when moved in the roller axial direction. Further, a temperature difference occurs due to a temperature difference between the inner surface and the outer surface of the flange, a long cooling process, a thickness difference between a root of the web and the flange, and a flange portion.

As a result of these, the H-section steel 1 after cooling is shown in FIG.
Squareness defects such as shown in (b), (c), (d) and (e) are likely to occur. Since these deformations cannot be straightened by a roller straightening machine, press straightening and heat straightening are performed, but since all of these work depend on the sensitivity of the worker, workability, productivity, labor saving and It is a big problem in terms of quality.

On the other hand, as a method of correcting the squareness online, a method of pressing the outside of the flange with a pressing roller is proposed in Japanese Patent Publication No. 55-30923.

This method is effective for straightening the flange (see FIGS. 6 (c), (d) and (e)). However, it is not very effective in correcting the inclination of the flange (see FIGS. 6 (a) and 6 (b)).

As shown in FIG. 7, when the one side of the flange of the H-section steel 1 in which the web is constrained from above and below by the web constraining roll 6 is straightened by the method of pushing from the outside by the flange pushing roll 2, the pushing amount is If it becomes large, there is a problem in that a fold occurs when correcting the inclination. Figure 8 shows the relationship between the difference in the flange pushing ([delta] ₀₎ and vertical deformation of the flange at this time (δ ₁ ~δ _0), the occurrence of broken This difference is Oshihakara.

In the case of straightening as shown in FIG. 7, the web restraint roll 6
Often interfere with other rollers unless they are installed inside the flange, that is, at a considerable distance from the base of the flange. For this reason, even in the case of FIG. 7, the binding force to the web becomes weak and a sufficient correction effect cannot be obtained.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention aims to solve these problems. Specifically, when correcting the flange squareness of H-section steel, this H
The web of shaped steel is restrained to the root of the flange by the web restraint roll, and then the flange is pushed from the outside by the flange pushing roll and the flange restraining roll provided along the axis perpendicular to the longitudinal direction of the H-section steel. On the other hand, there is provided an H-section straightness straightening device for H-section steel which is supported from the inside, and in particular, is arranged inside the flange to be straightened so that the flange restraint roll does not interfere with the web restraint roll.

<Structure of the Invention> Means for Solving the Problems and Their Actions That is, the straightening device according to the present invention is a flange pressing roll for pushing the upper and lower flanges on both sides of the H-shaped steel whose flanges are to be straightened from the outside, The upper and lower flange restraint rolls restrain the front end portions of the upper and lower flanges from inside, and the pair of upper and lower web restraint rolls restrains the upper and lower flanges from the both sides of the web up to the base of the web. While the flange pressing rolls and the upper and lower flange restraint rolls are rotatably supported by the respective rotary shafts that form a right angle with each other, the space that can accommodate each flange restraint roll at the surface corresponding to the inside of the flange by each web restraint roller. And each flange restraining roll is housed in each space.

The structure and operation of the present invention will be described below with reference to the drawings.

1 is a vertical cross-sectional view of a correction device according to one embodiment of the present invention, FIG. 2 is a vertical cross-sectional view taken along the line AA of the arrow, and FIG. 3 is shown in FIG. It is a graph which shows the correction effect of the apparatus shown in FIG. 4, FIG. 4 is a partial longitudinal cross-sectional view of the correction apparatus which concerns on the other Example of this invention, and FIG. 5 (a) and (b).
FIGS. 6 (a), 6 (b), 6 (c), 6 (d) and 6 (e) are vertical sectional views of another embodiment of the flange pressing roll, respectively, and FIGS. It is a longitudinal cross-sectional view of the flange portion shown, FIG. 7 is an explanatory diagram showing an example of a conventional inclination correcting method, and FIG. 8 is a relationship between the embedding amount and the difference between the vertical deformation amount of the flange in the representative example. It is a graph which shows.

First, in FIG. 1, reference numeral 1 denotes an H-shaped steel to be straightened, 2 denotes a flange pressing roll that presses the flange of the H-shaped steel 1 from the outside, and 3 denotes a flange restraint roll that supports the flange of the H-shaped steel 1 from the inside. The rolls 2 and 3 are arranged on both sides of the H-shaped steel 1 as the material to be straightened.

Further, as shown in FIG. 1, on both sides of the H-shaped steel 1 on one side, the flange pressing roll 2 and the flange restraining roll 3 are rotatably supported by a bifurcated yoke member on each side.

Further, in order to adjust the distance between the flange pressing roll 2 and the flange restraining roll 3, a flange thickness adjusting device 4 is provided on the yoke member 9, and the flange pressing roll 2 is provided.
And the flange restraint roll 3 have a predetermined distance, that is,
The size is adjusted according to the thickness of the flange.

The upper and lower sides of the yoke member 9 that supports the flange pressing roll 2 are independently reduced by the upper and lower reduction devices 5 and 5, and the respective reduction devices 5 are independently driven by the respective drive devices 8 and 8. Therefore, the vertical movement of one of the flange pressing rolls 2 supported by the yoke member 9, that is, a predetermined inclination amount (= difference in vertical pushing amount), is driven by driving each driving device 8 to reduce the respective pressing devices. It is adjusted and driven down by driving Nos. 5 and 5.

Further, reference numeral 20 denotes a lower frame, 21 denotes an upper frame, and the upper frame 21 is configured to be movable up and down with respect to the lower frame 20. The brackets 15 and 15 are projected so as to face the upper and lower frames 20 and 21, respectively. A rotary shaft 14 is attached to the tip of each bracket 15, and web restraint rolls 6 are rotatably attached to both sides of these rotary shafts 14, respectively.

The web restraint roll 6 further enhances the effect of straightening the flange squareness by restraining the web of the H-section steel 1 while the flange pressing roll 2 straightens the flange.

The gap between the upper and lower web restraint rolls 6 is adjusted by the gap adjusting device 7 so that the upper frame 21 is moved up and down with respect to the lower frame 20, and in this way, the gap is adjusted according to the web thickness.

As shown in FIG. 1, the web restraint roll 6 has, for example, a U-shaped cross section, and forms a void on the side facing the inside of the flange of the H-section steel 1 to be straightened. When the void is formed in this way, the flange restraint roll 3 can be housed in this void, and even if the web restraint roll 6 is extended to the web at the root of the flange of the H-section steel 1, the flange pushing roll 2 is It does not interfere with the web restraint roll 6.

The web restraint roll 6 is rotatably supported by the upper and lower frames 20, 21 via the brackets 16 around the shaft 14, and the distance between the left and right web restraint rolls 6 is: It can be adjusted according to the web height of the H-section steel 1 to be straightened, for example, by the size of the spacer 15, and by such adjustment, the restraint by the web restraint roll 6 can be extended to the root of the flange.

That is, as described above, the straightening device according to the present invention restrains the web from the inner surface of the flange to the root of the web by the web restraining rolls 6 above and below the rotation axis of the flange restraining roll 3 or beyond that, and in this restrained state. Straighten the flange. The effect of this place is shown in FIG. That is, in FIG. 3, the mark ● indicates the case where the web restraint roll 6 is extended to above the axis of the flange restraint roll 3, and ×
The mark indicates the other case. From this comparison, when the web restraint roll 6 is not extended to the axis of the flange restraint roll 2, the correction effect is small and the variation is large.
On the other hand, when the web restraint roll 6 is extended to the axis of the flange restraint roll 3, it is clearly seen that the correction effect is large and the variation is small.

Further, the difference due to the presence or absence of the flange restraint roll 3 can always keep the flange surface flat by disposing the flange restraint roll 3. Therefore, there is no difference in the amount of deformation above and below the flange, and as shown in FIG. 8 that there is no difference, the flange does not break at all.

As described above, in the straightening device according to the present invention, the flange pressing roll 2 and the flange restraining roll 3 are rotatably arranged on each axis perpendicular to the longitudinal direction of the H-section steel to be straightened, and the web restraining roll 6 is provided. Is extended to the axis of the flange restraint roll 3 to restrain the base of the flange and the web. Therefore, this straightening device can effectively straighten the squareness of the flange.

Further, when straightening is performed, as shown in FIG. 4, the flange pressing roll 2 may be divided into upper and lower parts (2a, 2a) and the tilt amount may be controlled independently in the vertical direction. As shown in FIG. 5, the drum shape 2b or the drum shape 2c capable of straightening may be formed.

That is, in the case of the structure shown in FIG. 4, the holding member 10 is position-controlled by the pressing mechanism 5 and its drive 8, and the pair of tilting yoke members 11 is rotatably moved by the pin 13 of the holding member 10. Be combined. Each tilting yoke member
The tilting drive mechanism 12 at both ends of the holding member 10 can swivel about the pin 13 and the divided flange pressing roll 2a.
Is adjusted to an arbitrary angle. The flange restraining roll 3 has the same structure as in FIG. 1, but tilts integrally with the flange pushing roll 2a. In FIG. 4, the web restraint roll 6
Although not shown, it has the same configuration as in FIG.

<Effects of the Invention> As described above, in the straightening device according to the present invention, the flange of the H-shaped steel is pressed from the outside by the flange pressing roll, the tip of the flange is constrained from the inside by the flange constraining roll, and further the web. The restraint roll restrains the web up to the base of the base to correct the inclination of the flange of the H-section steel.

With the straightening device according to the present invention having this configuration, the straightening work of the flange perpendicularity, which has conventionally depended on the sensitivity of the operator,
Safe and online, continuous and automatic without breaking.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a straightening device according to one embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view taken along the line AA of FIG.
FIG. 3 is a graph showing the effect of straightening by the straightening device according to the present invention in comparison with a comparative example, and FIG. 4 is an enlarged view of a part of the straightening device according to another embodiment of the present invention. Partial vertical sectional views, FIGS. 5 (a) and 5 (b) are vertical sectional views showing other shapes of the flange pressing roll, and FIGS. 6 (a), (b), (c), (d) and (). e) is a vertical cross-sectional view showing an example of defective flange perpendicularity of H-section steel, respectively.
The figure is explanatory drawing which shows an example of the correction aspect of a flange inclination, 8th
The figure is a graph showing the relationship between the pressing amount of the flange and the difference between the vertical deformation amount of the flange when correcting the perpendicularity of the flange. Reference numeral 1 ... H-shaped steel to be straightened 2 ... Flange pressing roll 2a ... Divided flange pressing roll 2b ... Flange pressing roll of another example 2c ... Flange pressing roll of another example 3 ... Flange Restraint roll 4 …… Flange thickness adjustment mechanism 5 …… Flange push roll reduction device 6 …… Web restraint roll 7 …… Web thickness adjustment mechanism 8 …… Drive device for driving flange push roll reduction device 9 ...... Yoke member 10 …… Holding member 11 …… Tilting yoke member 12 …… Tilting yoke member drive 13 …… Pin 20 …… Lower frame 21 …… Upper frame

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshio Yoshimura 1-chome, Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture (no address) Inside Kawashima Steel Co., Ltd. Mizushima Works (56) References ) Actual development Sho 52-120134 (JP, U)

Claims (1)

[Claims] 1. A flange pushing roll for pushing the upper and lower flanges on both sides of an H-shaped steel whose flanges are to be straightened from the outside, an upper and lower flange restraining rolls for restraining the respective tip portions of the upper and lower flanges from the inside, and the upper and lower rolls. A pair of upper and lower web restraint rolls restraining from both sides of the web up to the base of the flange and the web, and the flange pushing rolls and the upper and lower flanges at each rotary shaft forming a right angle with the longitudinal direction of the H-section steel. While rotatably supporting the constraining rolls, a space portion for accommodating each of the flange constraining rolls is provided at a surface corresponding to the inside of the flange by each of the web constraining rollers, and each of the flange constraining members is accommodated in each of the spaces. A flange straightness straightening device for H-section steel, characterized in that the roll is housed.