JPH0252105A - Method and device for buckling preventing in edging press in rolling line - Google Patents

Abstract

PURPOSE:To reduce an edging time in a rolling line and to improve the working efficiency by pressing the top and bottom surfaces of a stock near the acting cetroid point of an edging force by necessary number of pressing rolls installed according to a width of the stock. CONSTITUTION:A stock is edge drafted by an edging press where metal dies 35 for edging are installed to be able to close to and separate from the stock in both the sides of a rolling line S for the stock. In that press, a pair of narrow width pressing rolls 17 and two pair of wide pressing rolls 27, 28 being able to close to and separate from the top and bottom surfaces of the stock and movable in the stock length direction are installed. Thus, the top and bottom surfaces of the stock near to acting centroid point of an edge force are pressed by the necessary number of the rolls 17, 27, 28 according to a stock width. Hence, an edging time in the rolling line is reduced and the working efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for preventing buckling of a width reduction press in a rolling line.

[Prior Art] Conventionally, as shown in FIGS. 4 and 5, buckling prevention means for width reduction presses in rolling lines have been used to prevent material a such as slabs.
In a width reduction press in which metals a and b are arranged opposite to each other across the line of the material to perform width reduction of material a by pressing both sides of the press, One presser roll C is arranged on the lower surface, and width reduction is performed while pressing the material a from above and below with the presser rolls C, thereby preventing buckling of the material a during width reduction.

[Problems to be Solved by the Invention] However, in the buckling prevention means of the width reduction press described above, only one presser roll C is provided on each of the upper and lower surfaces of the material a, so buckling of the material a cannot be prevented. There is a limit to the width reduction that can be done, and the reduction molding opening that can be made in one width reduction is usually 350 m.
It is about i.

Therefore, if material a is to be reduced in width by 35 (lsn+) or more, material a must be reduced in width by repeating the reduction multiple times, which is an obstacle to improving work efficiency.

The present invention solves the above-mentioned problem and aims to prevent material buckling when the width reduction amount is increased.

[Means for Solving the Problems] Among the present inventions, the first invention is to reduce the width of the material by adjusting the lower surface of the material in the vicinity of the center of gravity of the workpiece of the width reduction force to the required number of times when the width reduction press is used to reduce the width of the material. It is characterized by being pressed by a presser roll.

Among the present invention, the second invention is a width reduction press in which width reduction dies are arranged on both sides of a material line so that they can approach and separate from each other. It has a configuration in which one set of narrow width presser rolls is movable in the direction of the material, and two sets of wide width presser rolls are provided, each set of which can be moved toward and away from the other and movable in the longitudinal direction of the material.

[Function] In the first invention, buckling of the material is prevented by pressing the upper and lower surfaces of the material in the vicinity of the center of gravity of the action of the width reduction force with a required number of presser rolls in accordance with the width of the material during width reduction of the material in the width reduction press. To prevent.

In the second invention, a set of narrow width presser rolls, or one set or two sets of wide width presser rolls, which move the upper and lower surfaces of the material near the center of gravity of action of the width reduction force during width reduction of the material in the width reduction press. to prevent buckling of the material.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention, and in a width reduction press in which molds 35 for width reduction are arranged on both sides of a rolling line S so as to be able to approach and separate, the rolling line between the molds 35 is used. S
A first rail 1 extending above and parallel to the rolling line S
A first frame 3 having a desired shape and having a wheel 2 pivotally mounted on the upper part thereof is mounted on the first rail 1 so as to be movable, and a piston rod that can move forward and backward is mounted on one end of the first rail l. 4 is fixed via a required member, and the piston rod 4 of the first cylinder 5 is fixed to the first cylinder 5.
Connect to frame 3 of

The first cylinder 5 is located below the first rail 1, and is arranged so that the piston rod 4 is parallel to the first rail 1.

A first frame 3 extending downward from the first rail l
A second frame 10, in which a second rail 7 extending parallel to the first rail 1 is fixed to the leg portion 6 of the frame 10, and wheels 8.9 are pivotally connected to the second rail 7 at respective required positions; Third
The frame 11 is placed so that it can run.

The second frame IO is arranged closer to the entry side of the material line, and the third frame 11 is arranged closer to the exit side of the material line.

A second cylinder 13 having a piston rod 12 movable forward and backward at one end of the second rail 7, and a third cylinder 15 having a piston rod 14 movable forward and backward at the other end, each piston rod 12. The second cylinder 13 is fixed to the second cylinder 13 through a member having a desired shape so that
The piston rod 12 of the third cylinder 15 is connected to the second frame 10, and the piston rod I4 of the third cylinder 15 is connected to the third frame 11.

The second and third cylinders 13.15 are connected to the second rail 7.
The piston rods 12 and 14 are arranged in parallel with the second rail 7.

An axle box 18 rotatably supporting a narrow presser roll 17 is fitted into the guide portion 1B of the second frame IO extending below the second rail 7 so as to be slidable in the vertical direction. 2
A fourth cylinder 20 having a piston rod 19 that can move forward and backward is fixed to the upper surface of the frame 10 so that the piston rod I9 faces vertically and downward, and the piston rod 19 is connected to the axle box 18.

The narrow presser roll 17 is arranged so that its axis is parallel to the width direction of the rolling line S.

The fifth frame 22 is fitted into the guide portion 21 of the third frame 11 extending below the second rail 7 so as to be able to slide in the vertical direction, and can move forward and backward on the upper surface of the third frame 11. a fifth cylinder 2 having a piston rod 23;
4 is fixed with its piston rod 23 facing vertically and downward, and the piston rod 23 is attached to the fifth frame 2.
Connect to 2.

An axle box 2 in which wide presser rolls 27 and 28 are rotatably supported on guide portions 25 and 26 of a fifth frame 22 extending downward.
A sixth cylinder 33 and a seventh cylinder 34 have piston rods 31 and 32 that can move forward and backward on the −L surface of the fifth frame 22, and have piston rods 31 and 32 that are slidably fitted in the vertical direction. are fixed so that each piston rod 31, 32 faces vertically and downward, and the piston rod 31 is fixed to the axle box 2.
9, the piston rods 32 are also connected to the axle boxes 30, respectively.

The wide presser rolls 27 and 28 are arranged so that their axes are parallel to the axis of the narrow presser roll 17.

Furthermore, below the rolling line S between the molds 35, a device which is an upside-down version of the above-mentioned device is arranged symmetrically to the rolling line S so that the narrow presser roll 17 and the wide presser rolls 27 and 28 face each other. do.

Next, the operation of this embodiment will be explained.

When reducing the width of the material, when preventing buckling of the material using only the narrow width presser roll 17, the piston rod 12 of the second cylinder 13 is moved forward and the third cylinder 15 is moved forward.
The piston rod 14 of the second frame 1 is moved backward.
0 to approximately the center of the first frame 3, and the third frame 11 is retracted toward the exit side of the rolling line S of the first frame 3.

When the third frame 11 is retracted in the exit direction of the rolling line S, the piston rod 23 of the fifth cylinder 24
The axle box 29.3 is moved back through the fifth frame 22.
The wide presser rolls 27 and 28 supported at 0 are vertically separated from the rolling line S.

Further, the piston rod 4 of the first cylinder 5 is moved forward or backward to move the first frame 3 by a predetermined amount in the entrance direction or exit direction of the rolling line S, and the narrow presser roll 17 is moved.
After adjusting the center of gravity position for the width reduction force, the piston rod 19 of the fourth cylinder 20 is moved forward and the axle box 1 is moved forward.
A narrow width presser roll 17 supported by a roller 8 is brought vertically close to the rolling line S, and the narrow width presser roll 17 presses the material from above and below to prevent buckling of the material during width reduction. When preventing buckling of the material, the piston rod 12 of the second cylinder 13 is moved backward, and the piston rod 1 of the third cylinder 15 is
4 is moved forward, the second frame 10 is retracted toward the entrance side of the rolling line S of the first frame 3, and the third frame II
is moved to approximately the center of the rolling line S.

When the second frame 10 is retracted toward the entrance side of the rolling line S, the screws of the fourth cylinder 20 and the rod 1
The narrow presser roll 1 is supported by the axle box 18 with the roll 9 moved backward.
7 is vertically separated from the rolling line S.

Furthermore, in the same way as when using the narrow width presser roll 17,
The piston rod 4 of the first cylinder 5 is moved forward or backward to adjust the position of the center of gravity of the wide presser roll 27 with respect to the width reduction force.

Once the position of the wide presser roll 27 is determined, the piston rod 23 of the fifth cylinder 24 is moved forward to bring the fifth frame 22 vertically close to the rolling line S, and the piston rod 32 of the seventh cylinder 34 is moved forward. is moved backward to move the wide presser roll 27 supported by the axle box 30 vertically away from the rolling line S, and the piston rod 31 of the sixth cylinder 33 is advanced to move the wide presser roll 27 supported by the axle box 29 away from the rolling line S. It is placed perpendicularly close to the rolling line S and presses the material from above and below with wide press rolls 27 to prevent buckling of the material during width reduction.

Further, at this time, the sixth and seventh cylinders 33 and 34 may be operated in the opposite direction to press the material from above and below with the wide press roll 28 to prevent buckling of the material during width reduction.

When preventing buckling of the material using both the wide presser rolls 27 and 28, the second frame IO is retracted in the entrance direction of the rolling line S, as in the case when only the wide presser rolls 27 are used. The narrow presser roll 17 is vertically moved away from the rolling line S, and the piston rod 4 of the first cylinder 5 is moved forward or backward to move the wide presser roll 27.
The center of gravity position for the width reduction force of 28 is adjusted.

Furthermore, the piston rod 23 of the fifth cylinder 24 and the sixth,
Piston rod 31.32 of seventh cylinder 33.34
are moved forward respectively to bring the fifth frame 22 vertically close to the rolling line S, and at the same time, the wide presser rolls 27 and 28 supported by the shafts 29 and 30 are brought vertically close to the rolling line S to roll the wide The press rolls 27 and 28 press the material from above and below to prevent the material from buckling during width reduction.

At this time, the wide presser rolls 27, 28 can be raised and lowered separately by the sixth and seventh cylinders 33, 34, so even if the shape of the material in the height direction changes, the material can be raised accordingly. It can be pressed from the bottom.

FIG. 3 is a table showing the results of an experiment using the device of this example. In this experiment, the dimensions of the narrow presser roll 17 were 750φ
An experiment was conducted to prevent buckling during width reduction of a slab having a thickness of 250+u and a width of 900 to 2200 mm using a wide presser roll 27.28 having dimensions of 750φ x 750+u.

As can be seen from Fig. 3, by selecting or combining the narrow width presser roll I7 and the wide width presser roll 27, 28 to press the material from above and below, buckling of the slab can be prevented and slabs with a width of 900 to 2200 m5 can be produced. 150 under one width pressure
It was possible to reduce the width by an arbitrary amount of 1×1 of ~6005 m.

The method and device for preventing buckling of a width reduction press in a rolling line according to the present invention are not limited to the above-described embodiments, and various modifications may be made without departing from the gist of the present invention. Of course.

[Effects of the Invention] As explained above, according to the method and device for preventing buckling of a width reduction press in a rolling line of the present invention, various excellent effects as described below can be achieved.

1) Since the material can be pressed from above and below by selecting or combining narrow width presser rolls and wide width presser rolls, the material does not buckle even when materials of various widths are rolled down with a large width reduction amount.

2) Since it is possible to increase the amount of material rolled in one width reduction, the time required to form the material into a predetermined size is shortened, and work efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
A plan view showing the relationship between the narrow and wide presser rolls and the mold of the device shown in the figure, Figure 3 is a table showing the experimental results using the device shown in Figure 1, and Figure 4 is a conventional width reduction press. FIG. 5 is a view taken along the line V-■ in FIG. 4, showing the anti-buckling device. In the figure, 17 is a narrow press roll, 27 and 28 are wide press rolls, and 35 is a mold. Bamboo 3 diagram ◎ No presser roll required O presser roll IL 750@X 400 mm 1m (
? For △ Presser foot low IL, 750g5x 750mm
1:t[ffi opening presser foot O-+L 75055x7
50 mm Zura 7” for 21 flights f=2
50mm W=900~2200mmFig. 1 Fig. 2 Fig. 4 Fig. 5

Claims (1)

[Claims] 1) A rolling line characterized in that, during width reduction of the material by a width reduction press, the upper and lower surfaces of the material near the center of gravity of the action of the width reduction force are pressed by a required number of presser rolls in accordance with the width of the material. Method for preventing buckling of width reduction presses. 2) In contrast to a width reduction press in which width reduction dies are arranged on both sides of the material line so that they can be moved close to and separated from each other, a set of narrow width reduction dies that can be moved close to and separated from the upper and lower surfaces of the material between the dies and that can be moved in the longitudinal direction of the material is installed. A buckling prevention device for a width reduction press in a rolling line, characterized in that a width presser roll and two sets of wide width presser rolls, each set of which can be moved toward and away from each other and movable in the longitudinal direction of the material, are provided.