JPH0241368B2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides scalene angle steel, channel steel and other
This invention relates to a similar straightening roller for straightening shaped steel materials with defects such as bends and angular defects.

Shaped steel such as angle steel and channel steel are generally produced by hot rolling, but when producing in small quantities, flat steel, angle steel, etc. are appropriately combined and welded to produce scalene angle steel and channel steel. Sometimes.

However, these shaped steels suffer from shape defects such as bends and poor angles during cooling after rolling or welding, which is undesirable from the viewpoint of strength and aesthetics, and correction is performed to correct the shape.

Conventionally, press straightening devices and roller straightening devices shown in FIGS. 4 and 5 have generally been used as shape steel straightening devices to deal with shape defects such as bending and angular defects. The former type of press straightening has poor productivity and accuracy of correction, except in cases such as small-scale rework, so the latter type of roller straightening is generally adopted. FIG. 4 shows a cross section of a main part of an apparatus for straightening angle steel, and FIG. 5 shows a cross section of a main part of an apparatus for straightening channel steel. When straightening equilateral angle bars with the straightening rollers shown in FIG. 4, no particular inconvenience occurs. However, when attempting to straighten the scalene angle bar with the apparatus shown in FIG. 4, a waving phenomenon occurs on the wide side protruding from the rollers, as shown in FIG. For this purpose, it is necessary to use a roller with a large diameter and a large roller width, which increases the cost. Furthermore, when straightening groove-shaped steel, especially stainless steel, with the straightening roller shown in FIG. 5, points A and B of the groove-shaped steel in FIG. Niggari (burn-in)
Sometimes this occurred, making it impossible to correct the problem. In this case, in order to prevent seizure from occurring, it is possible to increase the gap between the upper and lower correction rollers, but if the clearance is increased, there are problems such as the inability to correct perpendicularity defects. .

The present invention has been made in view of the above-mentioned drawbacks, and provides a straightening roller for shaped steel that can straighten both scalene angle steel and channel steel without increasing the roller shape, especially the outer peripheral diameter of the roller. It provides equipment.

That is, the straightening roller used in the straightening roller device for shaped steel of the present invention is composed of a plurality of fixed rollers arranged in a staggered pattern and a plurality of lifting rollers. One of the rollers has a valley shape on its outer peripheral surface in a cross section parallel to the rotation axis of the roller, and the angle between the bisector of the bottom angle of the valley and the center axis of the roller is 50 to The other roller of the fixed roller and the lifting roller has a ring-shaped groove at an angle of 85 degrees, and the other roller of the fixed roller and the lifting roller has a substantially symmetrical relationship with the outer circumferential surface of the one roller on its outer circumferential surface, and the rotation of the other roller A slope that is chevron-shaped in a cross section parallel to the axis, the angle between the bisector of the apex angle of the chevron and the central axis of the roller is 50 to 85 degrees, and one of the slopes forming the chevron has a ring-shaped protrusion that is inclined at an angle of 5 to 40 degrees with respect to the rotational axis of the roller, and the apex angle between the slope and the side surface adjacent to it is 90 degrees or less in cross section; The feature is that the two sides of the shaped steel are straightened by pressure applied by the rollers.

For the part to which the correction roller of the present invention is attached, that is, the other parts of the correction apparatus except for the correction roller, the parts of a conventional correction apparatus can be used as they are. In other words, a roller straightening device can be obtained by using the pair of straightening rollers of the present invention in place of the conventional fixed roller and lifting roller.

In the straightening roller of the present invention, one roller has a ring-shaped groove with a valley-shaped cross section on its outer peripheral surface, and the other roller has a ring-shaped protrusion with a chevron-shaped cross section on the contrary.

Furthermore, in the correction roller of the present invention, the cross-sectional valley-shaped, chevron-shaped grooves and protrusions of the pair of rollers are inclined at a certain angle with respect to the rotation axis. In other words, 1 that forms a valley-shaped cross section and a mountain-shaped cross section.
The bisectors of the base and apex angles of the pair of slopes are inclined at 50 to 85 degrees with respect to the axis of rotation. Often the base and apex angles are 90 degrees. Therefore, one slope of the valley and the mountain forming the valley-shaped cross section and the mountain-shaped cross section are in the range of 5 degrees to 40 degrees with respect to the axis of rotation. Moreover, the other slope is in the range of 95 degrees to 130 degrees with respect to the rotation axis. Furthermore, for a roller that has a ring-shaped protrusion with a chevron-shaped cross section on its outer peripheral surface, of the two slopes forming the protrusion with a chevron-shaped cross section, the slope that is closer to parallel to the axis of rotation of the roller is It is a slope with an inclination of 5 to 40 degrees with respect to the rotation axis, and the apex angle formed by the adjacent side surface is 90 degrees or less in cross section. Note that the roller having a valley-shaped cross section and the roller having a chevron-shaped cross section are symmetrical to each other.

Therefore, the width of the slope inclined at an angle of 5 to 40 degrees with respect to the rotation axis can be made wider than other slopes. As a result, it is possible to form a trapezoidal cross-section or a chevron-shaped cross-section in the shape of a scalene triangle in which one side of the two sides has a different width than the other side. In this case, since the width of the slope that is at an angle of 5 to 40 degrees with the rotation axis is widened, the circle at the side end of the slope can be kept small.

In the straightening roller of the present invention, in which the slope for straightening the section steel has a scalene triangular cross section, even if the width of one of the slopes is increased, the maximum diameter of the roller can be made relatively small. can. Therefore, there is no difference in circumferential speed between the correction roller having the ring-shaped groove with a valley-shaped cross section and the correction roller having the ring-shaped protrusion with a chevron-shaped cross section, and galling (seizing) does not occur. In addition, both correction rollers have become more compact.
The cost will not be high. Furthermore, in the above-mentioned straightening roller having a ring-shaped protrusion having a chevron-shaped cross section, the outer circumferential surface of the roller is formed of only both slopes having a chevron-shaped cross section, and the slopes are inclined at an angle of 5 to 40 degrees with respect to the rotation axis of the roller. Since the apex angle formed by the and the adjacent side surface is 90 degrees or less in cross section, when straightening the channel steel, there is less risk of the straightening roller having the ring-shaped protrusion with a chevron-shaped cross section hitting the channel steel. Therefore, it is possible to straighten channel steel having various types of groove spacing, from wide groove spacing to narrow groove spacing, with the roller having the same ring-shaped protrusion.

Examples will be explained below.

Embodiment 1 A first embodiment of a typical shape steel straightening roller of the present invention is shown in FIG. This straightening roller includes a first roller 1 having a ring-shaped groove 1a with a valley-shaped cross section on its outer peripheral surface, and a ring-shaped protrusion 2a with a chevron-shaped cross section on its outer peripheral surface.
and a second roller 2 having a diameter. FIG. 1 shows a state in which the first roller 1 is a fixed roller and is connected to a fixed drive shaft 3 with a bolt 31. Further, the second roller 2 is used as an elevating roller, and is shown fixed with a bolt 41 to a vertically movable driven roller shaft 4 that is pressed against a fixed roller with a constant biasing force. Although the first roller 1 and the second roller 2 are drawn above the second roller 2 in the drawing of FIG. 1, in reality, as shown in FIG. A large number of first rollers 1 and second rollers 2 are arranged in a staggered manner between 51 and 52 at regular intervals, and the shaped steel W is pressed by the plurality of rollers 1 and 2 in a staggered pattern to change its shape. be corrected. In order to specifically clarify the shapes of the outer peripheral surfaces of the first roller 1 and the second roller 2, FIG.
It is depicted as if it were located. V-shaped valley 1a in cross section including rotation axis 1b of first roller 1
The first slope 11 forming the
15 degrees, and the second slope 12 is at 105 degrees with respect to the rotation axis 1b. Also, the width of the first slope 11 is the width of the second slope 11.
The length is about 1.5 times the width of the slope 12. The outer circumferential surface of the second roller 2 is formed into a protrusion 2a having a chevron-shaped cross section, and the angle of the first slope 21 of the two slopes forming the chevron is relative to the rotating shaft 2b.
15 degrees, and the second slope 22 is 105 degrees. Furthermore, the apex angle formed by the first slope 21 of the second roller 2 and the side surface 23 adjacent thereto is 80 degrees in cross section. The configuration of the shape steel straightening roller of the first embodiment is as described above.

A pair of correction rollers 1 and 2 of the first embodiment have a first correction roller that is inclined at 15 degrees with respect to their rotation axes 1b and 2b.
The width of the second slopes 11 and 21 is 1.5 times wider than the width of the second slopes 12 and 22. However, the maximum diameter of each roller 1, 2 is defined by the narrower second slope. Therefore, the maximum diameter of each roller 1, 2 has not increased much. Therefore, there is no difference in circumferential speed between the rollers 1 and 2, and galling (seizing) does not occur. Furthermore, even when straightening a large scalene angle steel, it is possible to straighten it with a relatively small straightening roller. Furthermore, by using the straightening rollers 1 and 2 of the first embodiment, it is possible to straighten not only scalene angle steel but also channel steel as shown in the figure. Furthermore, since the apex angle formed by the first slope 21 of the second roller 2 and the side surface 23 adjacent thereto is set to 80 degrees in cross section, even if the channel steel W has a relatively narrow groove width, As shown in the figure, correction is possible without contacting the side surface 23 of the second roller 2.

Reference Example A pair of correction rollers of a reference example is shown in FIG. These pair of correction rollers are composed of a first roller 6 and a second roller 7.
Similar to the rollers 1 and 2, it has a groove 6a with a valley-shaped cross section and a protrusion 7a with a chevron-shaped cross section. However, unlike the first embodiment, the apex angle between the first slope 71 of the second roller 7 and the side surface 73 adjacent thereto is 90 degrees or more. For this reason, in the case of a channel steel W having a relatively wide groove width, it is possible to straighten it without coming into contact with the side surface 73 of the second roller 7 as shown in the figure, but the straightening roller 1 of the first embodiment , 2, which has a relatively narrow groove width, may come into contact with the second roller 7. In this way, the pair of correction rollers 6 and 7 of this reference example are
Although it is suitable for straightening channel steel W with a wide groove width or certain scalene angle steel, etc., it is suitable for straightening a channel steel W with a narrow groove width such as the one straightened by the straightening rollers 1 and 2 of the first embodiment. It is not very suitable for straightening steel.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a main part of a roller straightening device showing a straightening roller according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of a roller straightening device showing a straightening roller of a reference example, and FIG. FIG. 1 is a side view of the main parts of a straightening device using a straightening roller, FIG. 4 is a roller arrangement diagram of a roller straightening device showing a conventional straightening roller, and FIG. 5 is a diagram of a roller straightening device showing another conventional straightening roller. 6 is a partial perspective view showing the state of the section steel straightened by the conventional roller straightening device of FIG. 4. FIG. 1, 6...first roller, 2,7...second roller, 1
a, 6a... Valley-shaped groove, 2a, 7a... Chevron-shaped protrusion.

Claims (1)

[Scope of Claims] 1 Consisting of a plurality of fixed rollers arranged in a staggered pattern and a plurality of lifting rollers, one of the fixed rollers and the lifting roller has a surface on its outer peripheral surface. , having a ring-shaped groove that is valley-shaped in cross section parallel to the rotation axis of the roller, and the angle between the bisector of the bottom angle of the valley and the central axis of the roller is 50 to 85 degrees. , the other roller of the fixed roller and the lifting roller has a chevron-shaped cross section on its outer circumferential surface which is in a substantially symmetrical relationship with the outer circumferential surface of the one roller and is parallel to the rotation axis of the other roller; The angle between the bisector of the apex angle of the chevron and the central axis of the roller is 50 to 85 degrees, and one slope of the slopes forming the chevron is 5 to 40 degrees with respect to the rotation axis of the roller. It has a ring-shaped protrusion that slopes at an angle of 90 degrees and the apex angle between the slope and the adjacent side surface is 90 degrees or less in cross section. A straightening roller used in a roller straightening device for shaped steel, characterized in that the straightening roller is adapted to straighten. 2. Of a pair of slopes forming the groove of one roller having a ring-shaped groove with a valley-shaped cross section, the width of the slope near parallel to the rotational axis of the inner roller is wider than the width of the other slope, and the width of the slope is chevron-shaped in cross-section. Claim 1: The width of the slope of the pair of slopes forming the ring-shaped projection of the other roller, which is closer to parallel to the axis of rotation of the inner roller, is wider than the width of the other slope. Straightening roller as described in section.