JPH0530802Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to rolling equipment for steel bars and wire rods, and particularly relates to a looper device for bending a plurality of rod-shaped materials made by separating rolled materials at thin-walled portions. .

(Prior art) Generally, in rolling equipment equipped with a plurality of rolling mills that continuously roll rolled materials such as wires and steel bars, rolling rolls are applied to the rolled materials between the front and rear rolling mills. Differences in transfer speed occur due to differences in rotation speed, rolling ratio, etc., so in order to maintain stable rolling operations, it is essential to absorb this difference in transfer speed of the rolled material. In order to absorb the above-mentioned difference in transfer speed of the rolled material, a so-called looper device is provided to curve the bar-shaped material being transferred, separated from the rolled material, between the rolling mills in the front and back rolling processes. .

The following is a looper device such as the one described above used in rolling equipment for wire and bar rolling.
61-17201) is shown in FIG. 4, which is an explanatory side view of the rolling equipment in which this looper device is installed.
This will be explained with reference to FIG. 5, which is an explanatory diagram of the planar configuration.

That is, on the side of the rolling mill 50 in the pre-rolling process of the pass line between the rolling mill 50 in the pre-rolling process that rolls the steel into a shape having a thin section in the longitudinal direction and the bar rolling mill 80 in the post-rolling process that rolls it into a bar. , there is a separating device 60 that separates the rolled material at a thin wall portion formed along the longitudinal direction of the central portion, and a looper device that bends the separated bar material in the horizontal and horizontal directions on the bar rolling mill 80 side. 70 are arranged respectively.

More specifically, the separation device 60 separates the rolled material at the narrow groove portion from a pair of pinch rolls 61 that press a narrow groove at the center of the thin wall portion of the rolled material in order from the rolling mill 50 side of the pre-rolling process. a separation roller 62 that converts the bar-shaped material into a bar-shaped material, and two pairs of drive rollers 63 that transport the separated bar-shaped material at upper and lower positions of the pass line, respectively;
64, and the looper device 70 includes, in order from the separating device 60 side, an entrance guide roller 71 that aligns the separated bar-shaped material with the pass line;
A guide roller 72 that curves and guides the bar-shaped material that has passed through the guide roller 71 in the left-right direction of the pass line, a pair of guides 73 that guides the bar-shaped material guided by the guide roller 72 toward the pass line side, and this guide. The bar material guided by 73 is passed through a bar rolling mill 80
and an exit guide roller 74 that guides the exit.

Next, the mode of operation of the separating device 60 and the looper device 70 having the above-described configuration will be explained below.

That is, the rolled material that has been rolled by the rolling mill 50 in the previous rolling process into a shape having a thin walled portion in the longitudinal direction at the center is conveyed to the pinch rolls 61, and the pinch rolls 61 roll the thin walled portion at the center of the thin walled portion. A narrow groove is pressed in. Then, the rolled material is separated into rod-shaped materials at the narrow groove portion by the separation roller 62, and the separated rod-shaped materials are separated into upper and lower portions of the pass line and transported by drive rollers 63 and 64, respectively.

Next, the entrance guide rollers 71 move the bar-like materials to a position that is spaced apart from the pass line at a predetermined distance in the horizontal direction and coincides with the pass line, and then separated into left and right parts again by the guide rolls 72, and each separated bar-shaped material is separated into a pair of bars. Each bar-shaped material is guided by a guide 73 in a curved state toward the pass line side, and each bar-shaped material is guided to a steel bar rolling mill 80 by an exit guide roller 74 .

In response to the degree of curvature between the guide roll 72 and guide 73 of this bar-shaped material, a speed difference occurs based on the rotational speed and rolling ratio of the rolling rolls of both rolling mills 50 and 80 in the front and rear rolling steps. is absorbed, each bar-shaped material is rolled by the rolling mill 80 without any trouble, and a steel bar is produced by rolling.

(Problems to be solved by the invention) The conventional technology described above has few functional problems and is useful in its own way, but from the viewpoint of installation space and maintenance and inspection, there are still problems as explained below. Have points.

That is, before transferring the rolled material separated by the separation device to the looper device, it is necessary to straighten the bar into a straight line in order to improve the conductivity of the bar. It must be made longer;
In addition to requiring a large installation space, there are problems in that maintenance and inspection of these devices requires a great deal of effort since there are many parts that make up these devices.

Therefore, it is an object of the present invention to solve the above-mentioned problems and provide a looper device for rolled material that can be installed in a narrower space than before and that is easy to maintain and inspect.

(Means for Solving the Problems) The configuration of the looper device for rolled material according to the present invention includes a separation roller that separates the rolled material rolled by the rolling mill in the previous rolling process into rod-shaped materials at a thin section in the longitudinal direction. In a looper device disposed at a position corresponding to a pass line with a guide roller that guides each of the rolled bar materials to a rolling mill for a post-rolling process, a bulging surface that bulges in the vertical direction is provided between the two rollers. a fixed guide having a fixed guide, a swinging guide supported swingably about the shaft center at predetermined intervals in the longitudinal direction of the shaft center on the guide roller side, and having a curved surface facing the bulged surface; In addition to a speed control device that controls the rotational speed of the rolling roll based on the detection signal of the bending amount detection device of the bar-shaped material, the swinging guide is arranged around the swinging support portion and facing the bulging surface of the fixed guide. It is characterized by comprising an opening/closing device that opens and closes within a range of positions and predetermined opening degrees.

(Function) In the present invention, since the structure of the loosening device is as described above, the rolled material rolled by the rolling mill in the previous rolling process is separated at the thin wall portion through the separation roller, and is shaken into a plurality of bar-shaped materials. The rolling guide is guided to a rolling mill for a post-rolling process via guide rolls between the curved surface of the movable guide and the bulging surface of the fixed guide, and the swinging guide is opened to a predetermined opening degree by an opening/closing device.

Even if there is a difference in the transfer speed of the bar based on the rotation speed and rolling ratio of the rolling rolls of both rolling mills, and the amount of curvature of the bar increases due to this speed difference,
Since the curved portion of this bar-shaped member does not come into sliding contact with the curved surface of the swing guide, the curved state of this bar-shaped member is maintained normally.

On the other hand, the amount of curvature of this bar material is maintained at a substantially constant amount because the rotational speed of the rolling rolls of both rolling mills is adjusted by a speed adjustment device that operates based on the detection signal of the curvature amount detection device. continues to be.

In this way, the bar separated by the separation roller is bent only once during transfer between the two rolling mills, so in order to achieve a normal curved state in the bar, it is necessary to There is no need to straighten the material.

(Example) An embodiment of the present invention is shown in Fig. 1, which is an explanatory diagram of the overall configuration of a rolling equipment equipped with a looper device according to the present invention, Fig. 2, which is a side view of a partially cutaway part of the rolling equipment, and Fig. 2, which is a side view of a partially cutaway part thereof. The following description will be made with reference to FIG. 3, which is a sectional view taken along the line -2 in FIG.

That is, as shown in FIG. 1, a pass line is placed between the separation roll 23 near the rolling mill 21 side in the pre-rolling process and the guide roll 24 near the rolling mill 22 side in the post-rolling process in the longitudinal direction. A looper device 20 is provided for a rod-shaped material 26, which is formed by separating a rolled material 25 having a thin-walled portion in the center along the .

More specifically, as shown in FIG. 2 and FIG.
are erected so as to be parallel to the direction in which these rod-shaped materials 26 are transported, and a left side plate 2 and a right side plate are provided on both sides of this support plate 1 with an interval that allows the rod-shaped materials 26 to pass through. Board 3 was installed.

The upper side surface between the left side plate 2 and the support plate 1 has a bulging surface 4a that bulges upward, and this upper side surface is formed so as to gently intersect with the horizontal line as it approaches the guide roll 24. A left fixed guide 4 consisting of a 3-dimensional structure was held between the support plate 1 and a right side plate 3, and a right fixed guide 5 in which the left fixed guide 4 was turned upside down was held between the support plate 1 and the right side plate 3.

Further, above the left fixed guide 4 and below the right fixed guide 5, there are bulged surfaces 4 of both guides 4 and 5.
It has curved surfaces 6a, 7a corresponding to the shapes of a, 5a, and the curved surfaces 6a, 7a and the bulging surfaces 4a, 5.
The left and right swing guides 6 and 7, which can be opened to a predetermined opening degree from a position where the distance between which the wire material 26 can pass can be maintained between the support plate 1 and the side plates 2 and 3, are inserted through the support plate 1 and A long support shaft 8 is supported by the right side plate 3 and the support plate 1 and protrudes from the outer surface of the right side plate 7, and a short support shaft 9 is supported by the right side plate 3 and the support plate 1 and projects from the outer side of the right side plate 3. Supported so that it can swing freely.

A stopper 10 is provided upright on the opposite surface of the left side plate 2 on the free end side of the left swing guide 6, and a long arc-shaped hole 11 having a curvature with the center of the long support shaft 8 as the center of rotation is formed. Provided on the left side plate 2, this stopper 1
0 was inserted through the elongated hole 11 so as to be movable in the longitudinal direction.

Further, a lever 1 is provided at the protruding end of both the shafts 8 and 9.
2, 13 are fixed at one end side, and the tip of a rod of a hydraulic cylinder (not shown) is pivotally connected to the opposite free end side thereof via links 14, 15. For detecting the amount of curvature of the rod-shaped material 26 transferred through these spaces,
Elongated holes 16 and 17 are provided in the vertical direction, and although not shown, a light emitting device is disposed in one of these elongated holes 16 and 17, and a light receiver is disposed in the other, so that the light from the light emitting device is blocked. A bending amount detection device is provided to detect the amount of bending of the bar material 26, and the output side of the detection signal of this bending amount detection device is set to a rotation speed for controlling the rotation speed of the rolling rolls of both rolling mills 21 and 22. The configuration is such that it is connected to the input side of the control device.

Next, the looper device 2 having the configuration as described above is
The mode of action of 0 will be explained below.

Rolled material 2 rolled by the rolling mill 21 in the previous rolling process
5 is separated at the thin wall portion through the separation roller 23, and becomes a plurality of rod-shaped members 26, which are formed between the curved surfaces 6a, 7a of both swinging guides 6 and 7 and the bulging surfaces 4a, 5a of both fixed guides 4 and 5. Guide roll 24 passing through the gap
The swing guides 6 and 7 are guided to the rolling mill 22 for the post-rolling process via the opening/closing device. It is opened to the position where it touches the.

Even if a transfer speed difference occurs in the bar-shaped material 26 based on the rotation speed and rolling ratio of the rolling rolls of both rolling mills 21 and 22, and the amount of curvature of the bar-shaped material 26 increases due to this speed difference, this bar-shaped material Since the curved portion 26 does not come into sliding contact with the curved surfaces 6a, 7a of the swing guides 6 and 7, the curved state of the rod-shaped member 26 is maintained normally. Moreover, the amount of curvature of the bar-shaped material 26 is determined by the rotational speed of the rolling rolls of both rolling mills 21 and 22, and the light emitted from the light emitters passing through the vertically elongated holes 16 and 17 is received by the light receiver.
Since the speed adjustment device operates based on the detection signal of the curvature amount detection device that detects the curvature amount of the curve, the curvature amount continues to be maintained at a substantially constant amount.

In this way, the bar 26 separated by the separating roller 23 is bent only once during transfer between the rolling mills 21 and 22, so that the bar 26 is not bent normally like a conventional looper device. In order to realize a curved state, it is now possible to roll two steel bars in parallel without straightening the curved bar material 26 into a straight line.

In this embodiment, two fixed guides with the vertical directions reversed are provided, but these fixed guides can be replaced with integrally formed guides having bulged surfaces on the upper and lower surfaces, respectively. can.

In addition, the bulging surface was a curved surface that was smoothly continuous from the inlet side to the outlet side of the bar material to match the curved condition of the bar material, but by providing a mid-low part or a horizontal part in the center part, a discontinuous state was created. Even if the surface is curved, there will be no problem in guiding the rod-shaped material.

Furthermore, in this embodiment, the rotational speed of the rolling rolls of the rolling mills 21 and 22 in the front and rear rolling processes is controlled by the rotational speed control device, but the rotational speed of the rolling rolls of either one of the rolling mills is controlled by the rotational speed control device. Even if the speed is controlled more or less, it is possible to achieve the above-mentioned purpose of maintaining the amount of curvature of the rod-shaped material constant.

(Effect of the invention) The present invention includes a looper device that includes a fixed guide having a bulging surface, a swinging guide having a curved surface corresponding to the bulging surface, and a bar-shaped member separated between the bulging surface and the curved surface. In order to avoid sliding contact between the curved bar and the curved surface, the swing guide is opened at a predetermined opening degree, and the rolling machine of the back and forth rolling process is operated based on the detection signal of the curvature amount detection device of the amount of curvature of the bar. The rotation speed of the rolling rolls can be controlled.

Since the looper device is configured as described above, the bar-shaped material separated by the separating rollers is only bent once during transfer between the two rolling mills, so the bar-shaped material cannot be bent like a conventional looper device. In order to achieve a normal curved state, it is not necessary to straighten this curved bar into a straight line, and there is no need for a separation device to once straighten the bar into a straight state.
It can now be installed in a smaller space than before.

Furthermore, since the above-mentioned separation device is no longer necessary, the looper device is the only part that requires maintenance and inspection, and the effort required for maintenance and inspection can be reduced accordingly.

Furthermore, the looper device according to the present invention requires less installation space than conventional devices, and has the effect of shortening the length of the rolling equipment line.

Therefore, with the present invention, it has been possible to realize an extremely excellent and useful looper device that can be installed in a narrower space than before and is easy to maintain and inspect.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the overall configuration of a rolling equipment equipped with a looper device according to the present invention, Fig. 2 is a partially cutaway side view of the main part of the looper device according to the present invention, and Fig. 3 is a diagram showing the overall configuration of a rolling equipment equipped with a looper device according to the present invention.
Fig. 4 is a cross-sectional view taken along the - line in the figure.
The figure is an explanatory diagram of the overall planar configuration of a rolling facility equipped with a conventional looper device. 1...Support plate, 2, 3...Side plate, 4, 5...Fixed guide, 4a, 5a...Bulging surface, 6, 7...Swivel guide, 6a, 7a...Curved surface, 8...Length Support shaft, 9...Short support shaft, 10...Stopper, 11...
...Curved long hole, 12, 13... Actuation lever, 1
4, 15...Link, 16, 17...Elongated hole for detecting the amount of curvature, 20...Looper device, 21, 22...Rolling machine, 23...Separation roller, 24...Guide roller, 25...Rolled material , 26...bar-shaped material.

Claims (1)

[Claims for Utility Model Registration] Separation rollers that separate the rolled material rolled by the rolling mill in the previous rolling process into rod-shaped materials at the thin wall portion in the longitudinal direction, and each of the separated bar-shaped materials is transferred to the rolling mill in the post-rolling process. In a looper device disposed at a position corresponding to a path line with a guide roller to be guided, a fixed guide having a bulging surface that bulges in the vertical direction is provided between the two rollers, and the longitudinal axis of the guide roller side a swinging guide supported swingably about the axis at predetermined intervals in the direction and having a curved surface opposite to the bulging surface, and rolling based on a detection signal of the bending amount detection device of the bar-shaped material. In addition to a speed control device that controls the rotational speed of the roll, the swing guide is also provided with an opening/closing device that opens and closes the swing guide in a predetermined opening range and a fixed position facing the bulging surface of the fixed guide around the swing support part. A looper device that is characterized by the ability to