JPH0370565B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a continuous angle rolling device for continuously manufacturing angle bars having a desired cross-sectional shape using rolling mills arranged in parallel. <Prior art and its problems> Conventionally, when manufacturing a long angle material by rolling, a plurality of rolling mills are arranged in parallel, and the rolled material is transferred to the rolling mill by cross-feeding using a transfer or the like. It was common practice to sequentially fit the rolled material into the rolls of each rolling mill while transferring the material to a desired cross-sectional shape. However, with this method, it takes too much time to transfer the rolled material between rolling mills, resulting in a significant drop in the temperature of the material, which not only accelerates the wear of the roll caliber and deteriorates the roll source unit, but also causes damage to the product surface. It was also pointed out that the problem was that it could lead to a deterioration in the quality of the product. Incidentally, in recent years, when rolling flat steel materials and steel bars is carried out using a plurality of rolling mills arranged in parallel, a repeater as shown in FIG. It has become common practice to continuously guide rolled material between the rolls of each rolling mill. A plan view is shown in FIG. 9a, and the A
In the repeater whose cross-sectional view of -A is shown in FIG. 9b, an inner wall 32 curved with a desired curvature is fixed on a bottom plate 31, and a guide groove 33 for conducting specific rolled material is formed opposite to this inner wall 32. The outer wall 34 is installed so that it can be raised and lowered by a lifting device (not shown), and when the rolled material is continuously sent out from the rolling mill 35, the tip of the material first moves up and down as shown by the arrow in FIG. 9a. However, the driving force of the rolling mill 35 causes the guide groove 33 to enter the repeater.
Immediately before or at the moment when the tip of the material to be rolled, which is progressing while curving inside, comes off the repeater and is bitten by the next rolling mill 36, an elevating device linked to the detection device is activated, and the outer wall 34 is moved. It can be raised to the position shown by the dashed line in FIG. 9b. By the way, in this type of continuous rolling, the speed at which the material to be rolled is bitten into the rolling mill 36 is set to be slightly slower than the speed at which it is sent out from the rolling mill 35, in order to ensure flexibility in the rolling operation. However, as mentioned above, when the tip of the material to be rolled advances by itself along the guide groove 33 and reaches the next rolling mill, the outer wall 34 is raised and the outer periphery of the guide groove 33 is raised. Since the guide groove 33 is opened, the material to be rolled sent out from the rolling mill 35 protrudes from the guide groove 33 without any hindrance and forms a loop, allowing smooth and stable continuous rolling. In this way, we focused on the fact that by adopting a repeater, it became possible to perform continuous multi-stand rolling using a plurality of rolling mills arranged in parallel, significantly improving work efficiency and product quality, and we developed the present invention. When researchers tried to apply such a repeater to rolling angle materials, they found that conventional repeaters could not curve smoothly due to the rigidity of the material to be rolled, and it was difficult to produce products with accurate cross-sectional shapes. The result was that we had no choice but to conclude that it would be extremely difficult to secure this. <Means for Solving the Problems> From the above-mentioned viewpoint, the present invention applies a conventional rolling device in which a plurality of rolling mills are arranged in parallel as is to smoothly and stably continuously roll angle materials. The invention was completed through the research of the present inventors, who conducted numerous experiments and investigations in order to find a method to solve the problem. In, on the side opposite to the supply side of the rolled angle material of the three-roll rolling mill 1, there is an entry side guide 2 and an exit side guide equipped with a pinch roll 9 for correcting the direction of biting of the rolled angle material into the rolling rolls. 4, an inner cover 5 whose entry side end is partially cut out to define the inner circumferential surface of the rolled angle material guide groove;
The outer peripheral surface of the guide groove is defined, and the inner cover 5 is
and an outer cover 7 detachably supported by the rolling mill 1, and the guide groove defined by the inner cover 5 and the outer cover 7 rotates around an axis parallel to the roll axis of the rolling mill 1. and a vertically rotating repeater in which the position of the exit end forms a spiral arc curve deviated in the axial direction from that of the entrance end, and an inner open opening 8 is formed by a notch in the inner cover 5. The main body 3 is arranged, and the three-roll rolling mill 1
(a) On the rolled material delivery side of the three-roll rolling mill 1 and the next rolling mill 18 arranged in parallel, An entry side twist guide 12 having a guide diameter constituted by a plurality of twist rollers 22 (see Fig. 3) with a gradually increasing inclination for guiding the horizontally rotating repeater main body 13 while gradually twisting; b) Inner cover 15 for defining the inner peripheral surface of the guide groove
A plurality of guide rollers 23 (see FIG. 4) whose inclination gradually increases in succession to the inclination of the inner path of the rolled angle material of the input side twist guide are attached to the inner surface, and an attachment/detachment device (for example, an air cylinder) is attached to the inner surface. 16, and an outer cover 17 for defining the guide groove outer circumferential surface which is detachably supported by the inner cover 15, and as shown in FIG. (c) a horizontally rotating repeater main body 13 having an arcuate guide groove formed by providing a rolled angle material bulging detection device 26 at a position near the outer peripheral surface of the bulging portion 25; and (c) the horizontally rotating repeater main body 13 A plurality of rollers whose inclination gradually increases in succession to the inclination of the guide rollers 23 of the horizontally rotating repeater main body 13 are used to guide the rolled angle material sent out with its running direction changed by further twisting it to the next rolling mill 18. an exit twist guide having a guide path constituted by twist rollers 22; Angle material is 180
The inclination angles of the twist rollers 22 of the entrance twist guide 12, the guide rollers 23 of the horizontally rotating repeater main body 13, and the twist rollers 22 of the exit twist guide 14 are adjusted so that they are twisted by an angle of [degrees]. This apparatus is characterized in that a rotating repeater is arranged to constitute a continuous angle rolling apparatus. In FIG. 1, the reference numeral 10 is a vertical holding plate, and the reference numeral 11 is a phototube device for detecting passage of the tip of the material to be rolled. The above-mentioned "spiral arc curve" includes, of course, a spirally twisted arc, but the rolled material guided by the guide groove turns smoothly and is guided to a predetermined position without buckling. This is used as a general term for the curves shown in Figure 1. However, from the viewpoint of minimizing the repeater installation space, the exit side, which allows the rolled material to be turned with the minimum turning diameter and effectively prevents bending of the rolled material when the rolled material enters the repeater, is It is recommended to use an involute curve that gradually converges as it progresses. In addition, "arc-like" here includes not only a perfect circular arc, but also a curve in which the rolled material guided by the guide groove turns smoothly and is guided to a predetermined position without bending. It was used as a generic term. It goes without saying that the terms "vertical" and "horizontal" used here are not limited to their strict meanings, and may have some range of meaning. The guide groove of each repeater main body may also be formed using a surface such as the vertical holding plate 10 shown in FIG. It goes without saying that it may be defined as such. Furthermore, the pinch roll 9 for correcting the biting direction of the rolled material attached to the exit guide 4 may be of any type as long as it pinches the rolled material and lightly pushes it out in the roll biting direction of the rolling mill. Because the guide groove of the repeater body is twisted, the high-temperature rolled material that has been progressing at an angle to the roll biting direction can easily change its traveling direction to the roll biting direction. This will be corrected. However, with the repeater of this example, the angle material was continuously rolled using pinch rolls of the type shown in FIG. 2, and very good results were achieved. That is, the pinch roll shown in FIG.
As shown in Figure a and the schematic diagram, the upper roll is supported and adjusted by an air cylinder 19, and the angle of one is adjusted in the direction of progress of the rolled material from the repeater main body, and the other is adjusted in the direction of biting of the rolling roll. 2
It consists of a pair of upper and lower rolls, and only one of the lower rolls is driven by a motor 20. As shown in the cross-sectional shapes of the upper and lower rolls in FIG. 2b, the lower roll is provided with a groove 21 for protecting the ridge angle (pin angle) of the angle material. By the way, the running of the material to be rolled from entering the entry guide 2 to reaching the exit guide 4 is based only on the feeding force of the rolling rolls, so in order to ensure smooth running, the following steps are necessary: It is desirable to arrange guide rollers in a row on the inner surface of the upper wall of the entry guide 2 and the exit guide 4 and on the inner peripheral surface of the outer cover of the vertically rotating repeater main body 3. In particular, when rolling shaped materials such as angle materials, smooth guidance of the material to be rolled is particularly important. It is strongly recommended that you do so. Of course, a normal type guide roller is sufficient. FIG. 3 shows an example of the arrangement of the twist rollers 22 of the entrance twist guide 12 of a horizontally rotating repeater.
FIG. 4 shows an example of the arrangement of the guide rollers 23 in the horizontally rotating repeater body 13, FIG. 5 shows an example of the guide groove bulge 25 in the horizontally rotating repeater body 13, and FIG. Examples of the arrangement of the rollers 22 are shown. Here, the twisting angle of the rolled angle material from the time it enters the entry guide until it comes out from the exit guide is determined to be 180 degrees.The reason for twisting the rolled angle material in this way is This is because, without twisting, it is impossible to bend the rolled angle material without bending and maintaining an accurate cross-sectional shape.Furthermore, since the roll axis of the rolling mill is usually horizontal, twisting does not occur. This is because if the angle is not 180 [degrees], the material may flow inside the rolling mill or cause poor biting. From these explanations, it will be understood that the above-mentioned "180 [degrees]" does not refer to a particularly strict value. Next, the functions of the angle material continuous rolling apparatus configured as described above will be explained. Now, in the apparatus shown in FIG. 1, the rolled angle material sent out from the three-roll rolling mill 1 is first guided by the entrance guide 2 and enters the vertically rotating repeater body 3. The angle material that has turned along the guide groove is guided by the outlet guide 4 and its direction is corrected by the pinch rolls 9, and then bitten into the three-roll rolling mill 1 again. When the phototube device 11 detects the point at which the tip is sent out from the exit guide 4, the attaching and detaching device (air cylinder device) 6 interlocked with this causes the outer cover 7 to be retracted toward the front in FIG. It starts working. and,
At the next moment, the tip of the rolled angle material that is continuously sent out from the three-roll rolling mill 1 and reaches the roll again temporarily stops its progress due to the repulsion caused by the collision with the roll and the "slip" of the roll. Since it stops (instantaneous), the rear part of the subsequent rolled angle material will produce a slight kink at the position of the inner opening 8 of the guide groove, as shown in FIG. Therefore, the tip of the rolled angle material is pulled back as shown by the arrow in FIG. 7, and the outer cover 7
The pressing force of the rolled angle material, which was in close contact with the inner surface of the outer cover 7, is slightly loosened, and the outer cover 7 can be easily and reliably retracted. As a matter of course, the kink portion of the material to be rolled does not become so large that it does not cause any particular trouble in the next rolling. In this way, the tip of the angle material to be rolled is bitten by the roll of the rolling mill at the same time as the outer cover 7 is retracted from the guide groove position, so that continuous rolling continues as it is, but the outer periphery of the guide groove of the repeater body is opened. As a result, the rolled angle material entering the repeater at a faster speed than the re-biting speed can expand the loop without any hindrance.
Furthermore, since the biting direction is corrected by the pinch rolls 9, the material to be rolled does not flow within the roll caliber, and smooth continuous rolling can be continued. Next, the rolled angle material that has been rolled again in the three-roll rolling mill 1 is guided to the horizontally rotating repeater main body 13 while being twisted by the twist rollers 22 (non-driven) of the entrance twist guide 12. . In this example, an entrance twist guide with 5 pairs of twist rollers with a pitch of 600 to 700 mm was used, and each twist roller was adjusted to an angle as shown in Figure 3. It was confirmed that the roll passed between the twist rollers in accordance with the torsional inertia given by the rollers, and that the loss of rolling feed-out energy was extremely small.
The hatched diagram at the bottom of FIG. 3 schematically shows the twist angle of the rolled angle material at each part of the entrance guide. The rolled angle material guided to the horizontally rotating repeater main body 13 is guided by guide rollers 23 arranged in a row on the outer cover 17, and gradually increases its twist angle and curves smoothly toward the next rolling mill 18. It runs on its own and is then guided to the next rolling mill 18 while being further twisted by the twist rollers (non-driven) of the exit twist guide 14. At this time, a detection device (not shown, for example, a photocell device is placed near the entrance or exit of the outlet guide) detects the moment when the tip of the rolled angle material is bitten by the next rolling mill 18 or the moment it gets bitten. ), the outer cover attaching/detaching device (air cylinder) 16 is activated, and the outer cover 17 is lifted from the position of the guide groove. After the tip of the rolled angle material reaches the rolling mill 18 and before it is bitten by the rolls, there is warping due to the impact when the rolls and the rolled material collide, and the rolls are bent when biting. Due to slippage, etc.
This results in a very slight but inevitable time lag. For this reason, the rolled angle material 27 that is still continuously fed out from the three-roll rolling mill 1 momentarily bends, but the guide groove has a bulge 25 (from the normal running position of the rolled angle material). (It is best to bulge out about 180 mm), the bending part is limited as shown by the dashed line in FIG. 5, and the bending part is absorbed, making it difficult to lift the outer cover 17. This prevents interference with operation. Therefore, the angle material to be rolled after being bitten by the next rolling mill 18 will protrude from the guy groove without any hindrance and form a loop, allowing smooth and stable continuous rolling. Furthermore, even if the rolled angle material that is passing through the guide groove of the horizontally rotating repeater body 13 is about to bend for some reason, the bulged portion 2
The bent part can be limited to the part of the rolled angle material that was located at 5, and a rolled angle material bulge detection device (limit switch) 26 is installed at a position near the outer peripheral surface of the bulged portion 25. So,
It becomes possible to quickly detect the occurrence of bending and release the outer cover 17. Therefore, a situation where the rolling operation has to be interrupted can be quickly avoided. In the embodiment described above, all of the twist rollers and the guide rollers of the horizontally rotating repeater main body 13 are non-driven. It is recommended to install a leveler type pinch roll 28. In the pinch roll shown in Fig. 8, only the upper roll (preferably the upper roll is provided with grooves 14 as shown in Fig. 2b) is driven by a motor 29; This not only supplements the propulsive force of the rolled angle material, but also ensures that the ridge angles (pin angles) of the rolled angle material are aligned to prevent the material from flowing inside the roll caliber. is also possible. As is clear from the above explanation, in the continuous angle rolling machine of the present invention, the angle bar to be rolled is introduced into the machine with the edge angle (pin angle) facing upward, which is the easiest to transport. Since the rolled material and the rolled product are delivered from the device in the same posture, special auxiliary equipment is not required for handling the rolled material and rolled product. Although the present invention has been described above with reference to Examples, these Examples are merely illustrative of the present invention, and it goes without saying that the technical scope of the present invention is not limited thereby. <Overall Effects> As described above, according to the present invention, it is now possible to continuously roll angle materials with multiple stands using multiple rolling mills arranged in parallel, which was previously considered impossible, resulting in good quality. This brings about extremely excellent industrial effects, such as making it possible to provide highly efficient products.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing an embodiment of the continuous angle rolling machine of the present invention, and Fig. 2 shows the pinch rolls attached to the outlet guide of the vertically rotating repeater of the machine of the present invention. Figure a is a schematic diagram of the entire structure, Figure 2 b is a sectional view of essential parts of the upper and lower pinch rolls, Figure 3 is a schematic diagram showing an example of the twist roller arrangement of the entrance twist guide, and Figure 4 is a horizontal rotation FIG. 5 is a schematic diagram showing an example of the guide roller arrangement in the repeater main body. FIG. 5 is a schematic diagram showing an example of the guide groove bulge in the horizontally rotating repeater main body. FIG. 6 is an example of the twist roller arrangement of the exit side twist guide. FIG. 7 is a schematic diagram for explaining the behavior of the rolled material in a vertically rotating repeater, and FIG. 8 is an example of a pinch roll suitable for application to the exit twist guide. The schematic diagram shown in FIG. 9 shows a conventional repeater used for continuous rolling in rolling mills arranged in parallel, and FIG. 9 a is a schematic plan configuration diagram thereof, and FIG. 9 b
is a sectional view taken along line A-A in FIG. 4a. In the drawings, 1...three-roll rolling mill, 2...
...Inlet guide, 3...Vertical rotation repeater body, 4
...Exit guide, 5...Inner cover, 6...Detachable device, 7...Outer cover, 8...Inner opening, 9...
Pinch roll, 10... Vertical holding plate, 11... Phototube device, 12... Entrance side twist guide, 13...
...Horizontal rotation repeater main body, 14...Outside twist guide, 15...Inner cover, 16...Attachment/detaching device,
17...Outer cover, 18...Rolling machine, 19...Air cylinder, 20...Motor, 21...Groove, 22
...Twist roller, 23, 24...Guide roller, 25...Bulging portion, 26...Bulging detection device for rolled angle material, 27...Rolled angle material, 28
... Pinch roller, 29 ... Motor, 31 ... Bottom plate, 32 ... Inner wall, 33 ... Guide groove, 34 ...
Outer wall, 35, 36...Rolling mill.

Claims (1)

[Scope of Claims] 1. A three-roll rolling mill equipped with an entry side guide and an output pinch roll for correcting the direction of biting of the rolled angle material into the rolling rolls on the side opposite to the supply side of the rolled angle material. An inner cover having a partially cut out entrance end for defining the inner circumferential surface of the guide groove of the rolled angle material, and an inner cover that defines the outer circumferential surface of the guide groove and connecting the inner cover with the inner cover via the side guide. The guide groove has an outer cover detachably supported by the cover, and the guide groove defined by the inner cover and the outer cover rotates around an axis parallel to the roll axis of the rolling mill and rotates around an axis parallel to the roll axis of the rolling mill. A vertically rotating repeater main body is disposed in which the position of the side end forms a spiral arc-shaped curve offset in the axial direction from that of the entrance end, and an inner open opening is formed by the notch of the inner cover. At the same time, on the rolled material delivery side of the three-roll rolling mill and between the three-roll rolling mill and the next rolling mill arranged in parallel, (a) from the three-roll rolling mill; (b) an entry side twist guide having a guide path constituted by a plurality of twist rollers with gradually increasing inclinations for guiding the fed rolled angle material to the horizontal rotating repeater body while gradually twisting it; and (b) the guide. An inner cover for defining the inner peripheral surface of the groove and a plurality of guide rollers whose inclination gradually increases in succession to the inclination of the rolled angle material guide path of the input side twist guide are attached to the inner surface, and the cover is removed by an attaching/detaching device. and an outer cover for defining the outer circumferential surface of the guide groove, which is detachably supported by the guide groove, and the inlet end bulges in the outer circumferential direction, and the rolled angle material bulges at a position near the outer circumferential surface of the bulged portion. A horizontally rotating repeater body having an arc-like guide groove provided with a detection device, and (c) the rolled angle material whose running direction is changed by the horizontally rotating repeater body and sent out is further twisted and rolled to the next stage. It consists of an exit twist guide having a guide path formed by a plurality of twist rollers whose inclination gradually increases in line with the inclination of the guide roller of the horizontally rotating repeater main body for guiding the machine to the machine. The twist rollers of the entry side twist guide,
An angle material continuous rolling apparatus, characterized in that a horizontally rotating repeater is disposed in which the inclination angles of the guide rollers of the repeater main body and the twist rollers of the exit side twist guide are adjusted.