JP3270369B2 - Rolling machine for wire rods and bars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill for wire rods and steel bars, and more particularly to a simple, efficient, and easy maintenance of a four-roll mill for automatically changing a mill stand.

[0002]

2. Description of the Related Art When sizing and rolling wires and bars of various sizes using a four-roll mill, a plurality of four-roll mill stands may be arranged in series and rolled. For example, a "ten" type stand in which two pairs of four rolling rolls are orthogonal to a cross in the horizontal and vertical directions, and a "ten" type stand in which the four rolling rolls are inclined in an X-shape to reduce the rolling direction. The “X” type stand, which is shifted by 45 ° from the
Since the stand and the second stand are arranged in series and the strip W is sizing-rolled by shifting the rolling direction by 45 ° between the first pass and the second pass, a product with high dimensional accuracy can be manufactured. , Has recently received particular attention.

In the sizing and rolling of wire rods and bars of various sizes by such a four-roll mill, when the sizing range of the same roll is exceeded or when the roll is re-cut, a spare stand prepared in advance is required. Rearrange. Since this roll rearrangement operation is performed after the rolling is temporarily stopped, it must be performed as quickly and efficiently as possible and is automated.

[0004] As a conventional on-line wire rod / bar rolling mill having roll changing equipment, for example, a first stand P1 and a second stand P2 and two four-roll mill stands are arranged on a mill line, and a main motor is provided on a driving side. ,
A drive system of a two-stand independent drive system including a switching speed reducer and a mill drive is arranged. A "ten" type stand is installed in the mill stand P1, and an "X" type stand having different roll arrangements is installed in the mill stand P2. On the opposite side of the drive, a sled truck carrying a standby stand integrated with a "ten" type stand and an "X" type stand, and a rearranged truck (transverse truck) for transporting the sled truck are installed. Are known.

[0005] The spare stand mounted on the sled carriage is loaded on the rearranged carriage together with the sled carriage from the mill yard and transported along the mill line. On the other hand, in the stands P1 and P2 on the mill line, the "ten" type stand and the "X" type stand are pulled out of the line together with the sled carriage, and the standby stand on the rearranged carriage is replaced with the sled carriage to the mill line. It is sent and connected to the mill drive of the drive system.

[0006]

However, the "ten"
The phase of the roll arrangement is shifted by 45 ° between the mold stand and the “X” type stand, and therefore, the drive input shaft (the output shaft of the mill drive) for inputting the driving force of the mill motor to the roll drive shaft also has a shift of 45 °. . For example, as shown in FIG. 5, in the case of the “ten” type stand 5, the output shaft 3 _P1 of the mill drive 3 and the drive input shaft 5 a of the roll are connected in the horizontal direction via the detachment mechanism 18. On the other hand, in the case of the "X" type stand 6, the output shaft _3P2 of the mill drive 3 and the drive input shaft 6a of the roll are both inclined by 45 degrees as shown in FIG. Is performed in a 45 ° inclined direction with respect to the horizontal plane.

That is, the operation of connecting the output shaft of the mill drive to the drive input shaft is performed by pulling the sled carriage 7 by the drive cylinder 17 horizontally installed on the side of the mill drive 3 and extending the attachment / detachment mechanism 18. However, in the case of the "ten" type stand 5 having a horizontal input / output axis, a good connection is easily obtained even if the accuracy of the pulling position by the drive cylinder 17 is not so precise. However, in the case of the "X" type stand 6 in which the input / output axis is inclined, the input / output axis (6a, _3P2 ) will not be coaxial unless the pulling position by the drive cylinder 17 is extremely accurate. Is difficult to perform, and the connection cannot be performed as quickly as in the case of the “ten” type stand 5.

Therefore, the present invention has been made in view of the problem of the work of replacing the "X" type mill stand in such a conventional wire rod and bar rolling mill, and the phase of the roll drive shaft is set in the horizontal plane. An object of the present invention is to provide a rolling mill for wire rods and steel bars that can be connected collectively to a plurality of mill stands that are displaced from each other and that can be easily rearranged.

[0009]

To achieve the above object, the present invention according to claim 1 comprises a pair of horizontal rolls and another pair of horizontal rolls.
A "+" type stand consisting of a pair of vertical rolls and a pair
Roll and another pair of tilts perpendicular to the roll
The "+" type stand provided with a roll
In a wire rod and steel bar rolling mill in which a plurality of sets of four roll stands composed of an “x” -type stand shifted by 5 ° are arranged in series, the plurality of sets of roll stands are loaded on a common thread cart , The plurality of sets of roll rolls
The drive mechanism connected to the drive input shaft of the “x” type stand is mounted on the same sled carriage , and the drive mechanism is connected to the drive mechanism.
The input shaft to the drive mechanism provided is provided in the drive mechanism in a direction orthogonal to the mill line and in a horizontal direction.
Also, an output shaft connected to the drive input shaft of the "x" type stand
At an angle of 45 ° with respect to the horizontal direction .

[0010] The present invention according to claim 2 is characterized in that a pair of water
A "+" type roll consisting of a flat roll and another pair of vertical rolls
A stand, a pair of inclined rolls, and the orthogonal to the inclined rolls
With the other pair of inclined rolls, the rolling direction is the “+” type.
The stand is composed of an “x” -type stand shifted by 45 °.
A line in which multiple sets of 4-roll stands are arranged in series
In a rolling mill for materials and bars, the plurality of sets of roll stands are used.
Load on a common sled cart, and
Drive input of "x" type stand among roll stands
The drive mechanism connected to the shaft via a bevel gear has the same thread.
And the drive provided on the drive mechanism
The input shaft to the mechanism is horizontal and perpendicular to the mill line
An “x” -type stand provided in the drive mechanism in the direction
The output shaft connected to the drive input shaft of
And at an angle of 45 ° .

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an on-line wire rod and steel bar rolling mill facility including the roll changing facility of the present invention, and a first stand P on a mill line ML.
Two four-roll mill stands of the first and second stands P2 are arranged, and a drive system of a two-stand independent drive system including two main motors 1, a switching reducer 2 and a mill drive 3 is arranged on the drive side. I have. A “ten” type stand 5 is used for the mill stand P 1, and an “X” type stand 6 having a different roll arrangement is used for the mill stand P 2. Both stands 5 and 6 are installed on the same trolley (thread trolley) 7. I have.

On the other hand, on the opposite side to the drive side, a "ten" type stand 5
In addition, a rearranged trolley (transverse trolley) 9 for transporting a trolley 7 mounted with a spare stand 8 in which a pair of "X" stands 6 are combined along the mill line ML is provided.

A number of spare stands 8 are prearranged in a mill yard (not shown).
It is loaded on top and transported. On the other hand, mill line ML
The "ten" type stand 5 and the "X" type stand 6 are pulled out of the mill line together with the bogie 7 and the standby stand 8 on the rearranged bogie 9 which has been waiting enters the mill line ML instead of the bogie 7 instead. , Each mill stand P1,
At P2, they are separately connected to the mill drive 3 of the drive system.

[0014] Of the "ten" type stand 5 and the "X" type stand 6 assembled in a pair on a common cart 7,
In the "ten" type stand 5, the output shaft 3 _P1 of the mill drive 3 and the drive input shaft 5a of the roll are connected in the horizontal direction via the detachment mechanism 18 as in FIG. Absent.

On the other hand, in the case of the "X" type stand 6, as shown in FIG. 2, the drive input shaft 6a to the stand is inclined at 45 degrees to the horizontal and protrudes outside the stand casing. The stand 6 shown is of a one-roll axis drive type in which the roll drive input shaft is one axis, and the other three rolls are driven by gear transmission.

A drive system mechanism 12 having a pair of bevel gears 11 built into the inclined drive input shaft 6a,
The output shaft 3 _p2 extending in the horizontal direction of the mill drive 3 is connected. The drive mechanism 12 is mounted on the common carriage 7 together with the “x” type stand 6,
Output shaft 11a of the bevel gear 11 of the mill drive 3
It is inclined at an angle of 45 ° with respect to the horizontal direction, and is connected in advance to the drive output shaft 6 a to the “x” type stand 6. And
The input shaft 11b of the bevel gear 11 is a mill line ML
It extends in a direction orthogonal to the horizontal direction and in the horizontal direction, and projects outside the casing of the drive system mechanism 12. The input shaft 11 b to the drive system mechanism 12 is “x” of the mill drive 3.
It is set to be coaxial with the output shaft _3p2 for the mold stand. Although not shown, a drive cylinder for driving the carriage 7 is horizontally installed on the mill drive 3 side.

Reference numeral 13 denotes an auto coupler, which automatically connects utilities such as an electric signal system, a hydraulic system, and a lubrication system. Also,
Reference numeral 14 denotes an electric motor for adjusting the pressure of each roll of the “X” type stand 6, which is installed on the mill drive device 3, and is attached to and detached from the mill stand by a clutch 15. The reduction amount control of the electric motor 14 for the reduction adjustment is performed via the encoder 16 for the reduction adjustment.

FIG. 3 shows an operation flow of the automatic exchange of the mill stand by the cart 7 for changing the stand of the rolling mill for wire rods and steel bars. After stopping the rolling mill, first, from the first stand P1 and the second stand P2 on the mill line ML,
The carriage 7 with the “ten” -shaped stand 5 and the “X” -shaped stand 6 loaded thereon is pulled out as indicated by the arrow 20.

When the pulled out carriage 7 is mounted on the rearrangement carriage 9 mounted on the standby track with the spare stand 8 mounted thereon, the rearrangement carriage 9 shifts in the direction of the arrow 21.

When the spare stand 8 comes to a position facing the first stand P1 and the second stand P2 by shifting the rearranged cart 9, the spare stand 8 is moved by the bogie driving cylinder (not shown) on the mill drive 3 side. It is pulled in with the carriage 7 in the direction of arrow 22 (the direction orthogonal to the mill line ML).

When the auxiliary stand 8 on the carriage 7 is pulled in horizontally, the drive input shaft 5a extending in the horizontal direction of the "ten" type stand 5 is connected to the output shaft 3 _P1 of the mill drive 3. At the same time, which the input shaft 11b to the bevel gear extending horizontal "X" stand 6 is connected to the output shaft 3 _P2 of the mill drive 3.

Thus, the first stand P1 of the mill line
And the work of changing the mill stand of the second stand P2 is completed. Thus, according to this embodiment, in the conventional reassembling operation, particularly, the "X" type stand 6 which requires high-precision positioning and handling of the housing and is difficult to quickly replace is also replaced by "10". As in the case of the mold stand 5, it can be performed easily and quickly, and the efficiency of the assembling work is remarkably improved. Moreover,
Since installed a drive system mechanism 12 that mediates the connection between the "X" type output shaft 3 _P2 which is horizontally extended in the inclined drive input shaft 6a and the mill drive 3 stand 6 on the bogie 7, in the mill drive The gear mechanism is simplified, and maintenance work such as oil supply to the bevel gear 11 serving as the intermediate gear can be performed without stopping the operation of the mill.

FIG. 4 shows another embodiment of the present invention. FIG. 4 is a front view of the four-roll rolling mill viewed from a direction indicated by an arrow 20 in FIG. 1, and shows a state in which the sled carriage 7 is mounted on the traversing carriage 9. On the sled carriage 7, a “ten” type stand 5 on the front side and an “X” type stand 6 on the rear side
Are fixed to each other via a base frame 21. In the figure, reference numeral 7a denotes a wheel of the truck 7, reference numeral 7b denotes a traveling rail thereof, reference numeral 9a denotes a wheel of the traversing truck 9, and reference numeral 9b denotes a traveling rail thereof. Reference numeral 17r denotes a piston rod of a drive cylinder horizontally installed on the side of the mill live 3, and an up-and-down hook 2 provided on the bogie 7 with a hook 22 attached to the tip of the piston rod 17r.
3, the cart 7 is pushed and pulled.

The "ten" type stand 5 shown on the front side in the figure
The roll drive input shaft 5a extends horizontally from the side of the stand casing 5c via a detachable coupling 24, and has an end supported by a bearing 25. The bearing 25 is fixed to the carriage 7 by a drive system mechanism. 12 are fixed to the housing 12h. On the other hand, the roll drive input shaft 6a of the “X” type stand 6 shown on the
c, extends downward through a detachable coupling 26 at an angle of 45 ° from the side of the bearing, and a lower end thereof is connected to a bearing 27 fixed to a housing 12h of the drive system mechanism 12 and a pedestal 28 inside the housing 12h. And is supported by a bearing 29 fixed on the carriage 7. A driven bevel gear 30 is interposed between the two bearings 27 and 29 that support the roll drive input shaft 6a. The drive-side bevel gear 31 that meshes with the driven-side bevel gear 30 is connected to the input shaft 11b of the drive system mechanism horizontally supported by two bearings 32 and 33 fixed to the outer surface of the housing 12h of the drive system mechanism 12. It is installed. Thus, the input shaft (5) for driving the roll of the “ten” type stand 5
a) and the end of the input shaft (11b) for driving the rolls of the "X" type stand 6 protrude from the carriage 7 in the horizontal direction, and the couplings 34, 35 are respectively pulled by pulling the piston rod 17r. The drive is connected to the mill drive 3 via the power supply.

The operation and effect of the second embodiment are almost the same as those of the first embodiment. In each of the above embodiments, the traveling of the carriage 7 at the time of rearrangement of the stand is performed by the drive cylinder 17 provided on the mill drive side. However, the traveling means of the carriage 7 is not limited to this. A method in which a motor is mounted on the carriage 7 itself, a method in which a motor is mounted on another carriage and the carriage 7 is moved,
There are a method in which a screw is used instead of the drive cylinder 17, a method in which the floor surface moves up and down, and the like.

Further, in each of the above embodiments, two stands of the "ten" type stand 5 and the "X" type stand 6 are incorporated on the carriage 7 as the four roll stand. The present invention is also applicable to a case where two or more sets of four-roll stands are incorporated, for example, two "ten" stands and one "X" stand according to the stand configuration.

Although the one-roll axis drive system in which the roll drive input shaft of the four-roll stand is one axis has been described, the present invention is not limited to this, and the present invention can be applied to a two-roll axis drive system.

[0028]

As described above, according to the rolling mill for wire rods and bars according to the present invention, the "x" type stand in which the drive input shaft to the rolling roll is inclined can be used . Star
Loaded on the same sled cart as the sled cart loaded with the
The connection in the horizontal direction can be made via the mounted driving mechanism, and the connection in the horizontal direction can be made as in the case of the "+" type stand with a horizontal drive input shaft. There is an effect that it is possible to reassemble a plurality of displaced mill stands collectively extremely quickly and easily.

[Brief description of the drawings]

FIG. 1 is an overall layout diagram of an online facility of an embodiment of a rolling mill for wire rods and steel bars according to the present invention.

FIG. 2 is a schematic diagram of a connection configuration between a mill drive and an “X” type stand of the rolling mill of FIG. 1;

FIG. 3 is a flowchart showing a procedure of automatic stand replacement of the online facility shown in FIG. 1;

FIG. 4 is a front view showing another embodiment of the rolling mill according to the present invention.

FIG. 5 is a cross-sectional view of a conventional mechanism for attaching and detaching a “ten” type stand and a mill drive.

FIG. 6 is a cross-sectional view of a conventional mechanism for attaching and detaching an “X” type stand and a mill drive.

[Explanation of symbols]

 3 Mill drive 5 4 roll stand ("10" type stand) 5a Drive input shaft (of "10" type stand) 6 4 roll stand ("X" type stand) 6a Drive input shaft (of "X" type stand) 7 Threaded trolley (trolley) 8 Spare stand 9 Rearranged trolley (traversing trolley) 11, 30, 31 Bevel gear 11b Input shaft (of drive system mechanism) 12 Drive system mechanism

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Giant Castle Imamura 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. 1-chome (without address) Kawasaki Steel Corporation Mizushima Works (72) Inventor Shigeharu Ochi 5-2 Sokaicho, Niihama City, Ehime Prefecture Sumitomo Heavy Industries Machinery Corporation Niihama Works (72) Inventor Takeshi Tange Niihama, Ehime Prefecture No. 5-2, Sosokai-cho, Ichigo, Niihama Works, Sumitomo Heavy Industries, Ltd. (56) References JP-A-7-9010 (JP, A) JP-A-5-200403 (JP, A) JP-A-9-253705 ( JP, A) Japanese Utility Model Hei 7-3802 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 13/10 B21B 31/08 B21B 35/00 B21B 13/12 B21B 1 / 18

Claims (2)

(57) [Claims] 1. A pair of horizontal rolls and another pair of vertical rows.
And a pair of inclined rolls
And a pair of other inclined rolls orthogonal to the inclined rolls.
The rolling direction is shifted 45 ° from the “+” type stand
In a wire rod and steel bar rolling mill in which a plurality of sets of four roll stands composed of an “x” type stand are arranged in series, the plurality of sets of roll stands are loaded on a common threaded bogie, and Out of the roll stand
The drive mechanism connected to the drive input shaft of the "x" type stand is mounted on the same sled carriage , and the input shaft to the drive mechanism provided in the drive mechanism is arranged in a direction orthogonal to the mill line .
And "x" type provided in the drive mechanism in the horizontal direction.
The output shaft connected to the drive input shaft of the stand
A rolling mill for wire rods and bars, which is inclined at an angle of 45 ° to the direction . 2. A pair of horizontal rolls and another pair of vertical rows.
And a pair of inclined rolls
And a pair of other inclined rolls orthogonal to the inclined rolls.
The rolling direction is shifted 45 ° from the “+” type stand
Multiple sets of 4 rolls composed of an "x" shaped stand
In a wire rod and bar rolling mill in which stands are arranged in series, a plurality of the roll stands are mounted on a common thread carriage.
And the roll stand of the plurality of sets
Connected to the drive input shaft of the “x” type stand via bevel gear
The drive mechanism to be connected is mounted on the same sled carriage, and the drive
The input shaft to the drive mechanism provided in the
To the drive mechanism in a direction perpendicular to the
Connected to the drive input shaft of the "x" -shaped stand
That the output shaft is at an angle of 45 ° to the horizontal
Characteristic rolling mill for wire rods and bars.