JPH11221603A - Rolling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change the calibers of rolling rolls of each rolling mill in accordance with required dimensions or the like of a material to be rolled in a rolling device which unnecessitates a holding guide which is provided between respective rolling mills by shortening the distance between the rolls of two rolling mills. SOLUTION: By abutting a horizontal stand 12 and vertical stand 32 each other, the distance between the centers of rotary shafts of the horizontal rolls 10 and vertical rolls 30 are made not larger than a prescribed distance and the holding guide to be provided between respective stands 12, 32 is unnecessitated. In the horizontal stand 12, the horizontal rolls 10 on which many calibers A are formed along the direction (horizontal direction) of a rotary shaft are provided and, in the vertical stand 32, the vertical rolls 30 on which many calibers B are formed along the direction (vertical direction) of the rotary shaft are provided, besides, on these horizontal stand 12 and vertical stand 32, a shifting cylinder 24 and elevating/lowering cylinder 50 for moving these respective stands 12, 34 in the axial directions of, the respective rolls 10, 30 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling apparatus which enables guideless rolling by setting the distance between the centers of rolling rolls in adjacent rolling mills to a predetermined distance or less.

[0002]

2. Description of the Related Art Conventionally, when rolling a material to be rolled such as a steel bar or a wire rod, a rolling mill provided with a pair of rolls (rolling rolls) having a groove for rolling is used. The required rolling is performed by passing the material to be rolled through the groove (Kariba) formed in the above.

[0003] The rolling method of the material to be rolled is such that a rolling mill having an oval (elliptical) hole shape and a rolling machine having a round hole shape are alternately used as the hole shape of the rolling roll. The oval-round method in which the material is rolled in order, or the rhomb-square method in which the material to be rolled is rolled by alternately using a rolling mill with a rhombic hole type and a rolling mill with a square hole type When rolling one material to be rolled into a desired shape such as a circle or a square by rolling, a plurality of rolling mills are usually used.

[0004] In performing such rolling,
In the above-mentioned oval-round method, a holding guide composed of a roller or the like is provided on the entry side of the material to be rolled into the round hole type, and the material to be rolled by the oval hole type is guided to the round hole type in a correct posture. , Accurate rolling is performed.
Also in the case of the square method, a similar holding guide for the material to be rolled is installed on the entrance side of the square hole type as necessary in order to secure a high surface reduction rate.

However, when the gap between the rolling rolls is adjusted by a rolling-down device provided in the rolling mill, the holding guide attached to the rolling mill can be adjusted to an appropriate position accordingly. It is necessary, and there is a disadvantage that the time required for adjustment accompanying a change in required dimensions of the material to be rolled (hereinafter referred to as a change in rolling size) or the like becomes long. In addition, since poor guiding of the holding guide leads to defective rolling products, maintenance of bearings, inspection of surface defects of rollers, inspection of rotation status, and the like must be frequently performed. Further, since the holding guide is provided between the rolling mills, the structure becomes complicated, and there is a problem that the equipment cost is increased.

Therefore, in order to solve such a problem,
For example, in Japanese Patent Application Laid-Open No. 7-60301, as a rolling device used when rolling a material to be rolled by each of the above methods,
The rotation axes of the rolling rolls are orthogonal to each other at an angle of 90 °,
In addition, the distance between the centers of the rolling rolls is 1.2 mm of the roll diameter.
The use of a rolling device having two rolling mills arranged so that the rolling speed is not more than twice, so that rolling of the material to be rolled (guideless rolling) can be performed without providing the holding guide between the rolling mills. Has been proposed.

[0007] The rolling mill proposed in this proposal is an oval to round,
Alternatively, by shortening the distance between the rolls of two rolling mills used in rolling the material to be rolled from a rhombus to a square, the holding guide conventionally required is unnecessary, and by providing the holding guide, The resulting problem can be solved.

[0008]

However, in the rolling apparatus proposed above, since the rolling roll provided in each rolling mill is a so-called single caliber having one hole shape for rolling, the rolling size is small. Although the position adjustment of the holding guide and the maintenance of the holding guide accompanying the change or the like can be made unnecessary, at the time of rolling size change, etc., each time in each rolling mill according to the required size of the material to be rolled, It was necessary to replace the rolling roll or the rolling mill itself. In addition, since the change operation takes time, there is a problem that the operation rate of the rolling device is reduced and the productivity of the material to be rolled is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in consideration of the above-described problem, and in a rolling apparatus in which the distance between two rolling mills is reduced to eliminate the need for a holding guide provided between the rolling mills, An object of the present invention is to make it possible to easily change the roll form according to the required dimensions of the material to be rolled.

[0010]

Means for Solving the Problems, Embodiments of the Invention, and Effects of the Invention According to the first aspect of the present invention, which has been made to achieve the above object, a mold for rolling a material to be rolled is formed. By arranging two rolling mills provided with a rolling roll composed of a pair of rolls, the rotation axes of the rolling rolls are orthogonal to each other, and the distance between the axes of the rolling rolls is equal to or less than a predetermined distance. In a rolling apparatus that enables guideless rolling, each rolling mill is provided with a rolling roll in which a plurality of the die are formed in the axial direction as the rolling roll, and a material to be rolled in each rolling roll is provided. Rolling machine moving means for moving each of the rolling mills in the axial direction of each of the rolling rolls in order to set and change the shape of the holes arranged on the pass line.

As described above, in the rolling apparatus of the present invention, the two rolling mills are arranged such that the rotation axes of the rolling rolls of each rolling mill are orthogonal to each other and the distance between the axes of the rolling rolls is a predetermined distance. By arranging as described below, it is possible to perform guideless rolling without the need for the above-described holding guide. Each rolling mill is provided with a rolling roll in which a plurality of rolling molds are formed in the axial direction as rolling rolls.

Therefore, according to the rolling apparatus of the present invention, by eliminating the need for the holding guide, not only can the position adjustment of the holding guide and the maintenance of the holding guide accompanying the change of the rolling size and the like be unnecessary. By moving each rolling mill in the axial direction of the rolling roll, it is possible to easily change the dies used for rolling in each rolling mill (that is, the dies arranged on the pass line of the material to be rolled). Therefore, when there is a change in the rolling size or the like, as in the past, replacing the rolling rolls provided in each rolling mill,
Alternatively, by changing the rolling mill itself, it is not necessary to change the form used for rolling, and the change operation can be easily performed.

Further, since the rolling apparatus of the present invention is provided with rolling mill moving means for moving each rolling mill in the axial direction of the rolling roll, the die used in each rolling mill according to a change in rolling size or the like. When changing the rolling mill, it is not necessary to move each rolling mill manually, and the rolling mill can be moved very easily using the rolling mill moving means.

That is, a so-called multi-caliber type rolling mill provided with a rolling roll in which a plurality of cavities are formed along the axial direction is conventionally known as a rolling mill.
In addition to simply applying a multi-caliber type rolling mill to the above-described conventional apparatus, by providing rolling mill moving means for moving such a multi-caliber type rolling mill in the axial direction of the rolling roll, each type of rolling mill is changed in accordance with a change in rolling size. When changing the form used for rolling in a rolling mill, the changing operation can be performed easily and in a short time.

Therefore, according to the rolling apparatus of the present invention, the operation of adjusting the rolling apparatus in accordance with the change of the rolling size can be performed in a very short time. Can be improved in productivity. By the way, when rolling a material to be rolled using a rolling mill in this way, it is necessary to rotate a rolling roll of each rolling mill using an electric motor. Conventionally, as a method of driving the rolling rolls of such rolling mills, an individual driving method in which each of the rolling rolls of each rolling mill is driven using a dedicated electric motor, and a single electric motor that drives the rolling rolls of a plurality of rolling mills. There is known a common driving method for driving using a common driving method.

For this reason, in the rolling apparatus of the present invention,
To rotate the rolling rolls of each rolling mill, one of these two types of driving methods will be used,
In particular, in the present invention, since each rolling mill is a multi-calibre type, as described in claim 2, an electric motor and a power transmission device that transmit power to each rolling mill to rotate each rolling roll are provided. It is desirable that the driving system of each rolling mill be an independent driving system by providing for each rolling mill.

In other words, in the present invention, each rolling mill is of a multi-caliber type, and various types of holes are formed on the rolling rolls, from large diameter to small diameter. Then, at the time of rolling the material to be rolled, one of the plurality of holes is selectively used. Further, in order to successfully roll the material to be rolled in each rolling mill, the rotational speed of the rolling roll in each rolling mill is reduced by the reduction of the material to be rolled which is determined by the size of the die used in each rolling mill. It is necessary to set an optimum value corresponding to the area ratio and the like. However, in the rolling device of the present invention, when the rolling rolls of each rolling mill are driven by a common drive system, the rotation speed ratio of the rolling rolls in each rolling mill is determined by the power transmitted from the electric motor to each rolling roll. Even if the rotation speed of the electric motor is adjusted, it is difficult to set the rotation speed of each rolling roll to an optimum value according to the form used in each rolling mill because the rotation speed of the electric motor is fixed by the transmission device. is there.

On the other hand, in the rolling apparatus of the present invention, the drive system for the rolling rolls of each rolling mill is configured as described in claim 2, and the rolling rolls of each rolling mill are driven independently. If driven, the rotation speed of each rolling roll can be individually adjusted by adjusting the power supplied to each electric motor, so that good rolling characteristics can always be realized.

Further, even when it is necessary to guide the material to be rolled into the groove, this guide may be used to guide the leading end of the material to be rolled so as to enter the groove of the other rolling mill to be rolled next. Well, unlike the conventional holding guide, it is not necessary to form the material to be rolled firmly to prevent the inclination of the material to be rolled.
As compared with the case where a conventional holding guide is provided, the holding guide can be formed easily, and maintenance and the like thereof can be omitted, so that the intended object of the present invention can be sufficiently achieved.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, FIG. 1 is a front view showing a schematic configuration of an entire rolling apparatus of an embodiment to which the present invention is applied, FIG. 2 is a right side view thereof, and FIG. 3 is provided in the rolling apparatus of the embodiment. FIG. 3 is an explanatory view showing two sets of rolling rolls, a horizontal roll 10 and a vertical roll 30.

As shown in FIGS. 1 and 2, the rolling apparatus of the present embodiment comprises a horizontal roll 10 comprising a pair of rolls 10a and 10b in which a plurality of rolling molds A are formed along the axial direction.
A horizontal stand 12 (see FIG. 3) provided rotatably.
Similarly, a vertical stand 32 provided rotatably with a vertical roll 30 (see FIG. 3) composed of a pair of rolls 30a and 30b formed with a plurality of rolling die B along the axial direction.

The horizontal stand 12 and the vertical stand 32 correspond to two rolling mills of the present invention.
During the rolling of the material to be rolled, the stand clamps 14, 34
Are used in contact with each other on one side along the vertical direction. As shown in FIG. 2, when the horizontal stand 12 and the vertical stand 32 come into contact with each other, the horizontal roll 10 and the vertical roll 30 are arranged such that the distance between their rotation axes is equal to or less than a predetermined distance that does not require a holding guide. Position.

Next, the horizontal stand 12
The rotation axis of the vertical roll 30 is fixed to the clamp base 16 via the stand clamp 14 so that the rotation axis of the roll 0 crosses the pass line L of the material to be rolled in the horizontal direction. The stand clamp 34 is arranged to intersect the material pass line L in the vertical direction.
And is fixed to the clamp base 36 via the.

The clamp bases 16 and 36 are fixed to the floor of a facility where the rolling mill is installed so as to sandwich the horizontal stand 12 and the vertical stand 32. The horizontal stand 1 is fixed to the clamp bases 16 and 36 by hydraulic pressure or the like.
2 and the vertical stand 32 are urged toward the end face where the rolls 10.30 are provided, so that the horizontal stand 12 and the vertical stand 32 abut on the end face side where the rolls 10 and 30 are provided. The distance between the rotation axes of the rolls 10 and 30 is maintained at a predetermined distance or less.

The horizontal stand 12 and the vertical stand 32 are detachably connected to the stand clamps 14 and 36, respectively.
It can be moved with respect to the clamp bases 16 and 36 along the axial direction of the horizontal roll 10 and the vertical roll 30, or can be removed from the clamp bases 16 and 36 and changed to another stand.

On the other hand, as shown in FIG.
Are the rolls 10a, 10b constituting the horizontal roll 10.
Spindles 18a for transmitting power for rotating the
The pinion stand 20 is connected to the rotation shaft of the electric motor 22 via a pinion stand 20 via a pin 18b. In addition, the pinion stand 20
Upon receiving power from the rotating shaft of the electric motor 22, the spindle 18
a, 18b, which has a built-in power transmission gear mechanism for transmitting power, and the pinion stand 20 and the electric motor 22 are similar to the clamp bases 16, 36 described above.
It is fixed to a floor or the like of a facility where the rolling device is installed.

Further, by changing the distance between the pinion stand 20 and the horizontal stand 12,
A shift cylinder 24 for moving the horizontal stand 12 in the axial direction of the horizontal roll 10 is provided. As a result, each of the stands 12, 32 by the stand clamps 14, 34 is used.
Is weakened and the hydraulic pressure applied to the shift cylinder 24 is adjusted to displace the horizontal stand 12 in the horizontal direction as shown by the dotted line in FIG.
The hole shape A located on the pass line of the material to be rolled can be changed as appropriate.

Next, the vertical stand 32 is fixed to a clamp base 36 via a stand clamp 34 on the side opposite to the side on which the vertical roll 30 is provided. The whole is placed on an elevating frame 46 arranged below it. And
A pinion stand 40 for transmitting power for rotating the rolls 30a and 30b constituting the vertical roll 30 to the vertical stand 32 via spindles 38a and 38b is provided below the lifting frame 46. Further, the pinion stand 40 is connected to a rotating shaft of the electric motor 42.

The pinion stand 40, like the pinion stand 20, has a built-in power transmission gear mechanism for receiving power from the rotating shaft of the electric motor 42 and transmitting the power to the spindles 38a and 38b. In addition, the pinion stand 40 and the electric motor 42 are fixed to the clamp bases 16 and 36 and a floor or the like formed below the fixed position of the pinion stand 20 and the electric motor 22.

The vertical stand 32 is moved in the axial direction of the vertical roll 30 by changing the distance between the lifting frame 46 and a frame portion 48 that supports the lifting frame 46 so as to be able to move up and down. An elevating cylinder 50 is provided. As a result, the stand clamps 14, 3
4 by weakening the connection between the stands 12 and 32 and adjusting the hydraulic pressure applied to the lifting cylinder 50, the vertical stand 32 is displaced in the vertical direction as shown by the dotted line in FIG. The hole type B located can be changed appropriately.

In the rolling apparatus of the present embodiment, the horizontal stand 12 and the vertical stand 32 are moved in the axial direction of the horizontal roll 10 and the vertical roll 30 via the shift cylinder 24 and the lifting cylinder 50, respectively. And the spindles 18a, 18b and 38a, 3 for transmitting power to the rolls 10, 30 respectively.
8b is a spline shaft, and the horizontal stand 12 and the vertical stand 32
Power can be transmitted to each of the rolls 10 and 30 even when the rolls move in the zero axis direction.

As described above, according to the rolling apparatus of the present embodiment, the horizontal stand 12 has the horizontal roll 10 on which the large number of cavities A are formed along the rotation axis direction (in other words, the horizontal direction). The vertical stand 32 is provided with a vertical roll 30 in which a large number of hole types B are formed along the rotation axis direction (in other words, the vertical direction). Further, the horizontal stand 12 and the vertical stand 32 The stands 12 and 34 can be moved in the axial direction of the rolls 10 and 30 via the shift cylinder 24 and the elevating cylinder 50, respectively.

Therefore, according to the present embodiment, the horizontal stand 12 and the vertical stand 32 are brought into contact with each other via the clamp bases 16 and 36, so that the horizontal roll 10 and the vertical By setting the distance between the rotation axes of the roll 30 to a predetermined distance or less, each stand 1
In addition to eliminating the need for a holding guide provided between the rolls 2 and 32, when the rolling size is changed, the shape of the hole used for rolling by the horizontal stand 12 and the vertical stand 32 is changed to the required size of the material to be rolled. Can be changed by a very simple operation. Therefore, according to the rolling device of the present embodiment, it is possible to perform the adjusting operation of the rolling device in a very short time in accordance with the change of the rolling size, etc. Can be improved.

In the rolling apparatus of this embodiment, two motors 22 and 42 are provided for driving the rolls 10 and 30 provided on the horizontal stand 12 and the vertical stand 32, respectively. The rotation of 22, 22 is performed by the dedicated pinion stands 20, 40, and the spindles 18 (18a, 18b), 38 (38a, 38), respectively.
Since the transmission is performed to each of the rolls 10 and 30 using b), the horizontal roll 10 and the vertical roll 30 in each of the stands 12 and 32 can be independently driven. Therefore, even when the hole types A and B used for rolling are changed in each of the rolls 10 and 30 due to a change in the rolling size and the like, the rotation speed of each of the rolls 10 and 30 is adjusted to the reduction rate of the material to be rolled. It can be set optimally according to it, and the rolling of the material to be rolled can be performed very well.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a schematic configuration of an entire rolling mill according to an embodiment.

FIG. 2 is a right side view of the rolling mill shown in FIG.

FIG. 3 is an explanatory diagram showing a horizontal roll 10 and a vertical roll 30 provided in the rolling device of the present embodiment.

[Explanation of symbols]

10: horizontal roll, A: hole type, 12: horizontal stand, 1
4: Stand clamp, 16: Clamp base, 18
a, 18b: spindle, 20: pinion stand, 2
2 ... Electric motor, 24 ... Shift cylinder, 30 ... Vertical roll, B ... Hole type, 32 ... Vertical stand, 34 ... Stand clamp, 36 ... Clamp base, 38a, 38b ... Spindle, 40 ... Pinion stand, 42 ... Electric motor, 46
... Elevating frame, 48 ... Frame part, 50 ... Elevating cylinder, L
…Path line.

Claims (2)

[Claims] 1. A rolling mill comprising a pair of rolls each having a pair of rolls formed with a mold for rolling a material to be rolled, comprising: In a rolling device that enables guideless rolling by arranging the center distance between the rolls to be equal to or less than a predetermined distance, in each of the rolling mills, a plurality of the die are formed in the axial direction as the rolling rolls. In order to set and change the form of the rolls to be arranged on the pass line of the material to be rolled in each of the rolling rolls, the respective rolling mills are moved in the axial direction of each of the rolling rolls. A rolling mill moving means for moving the rolling mill. 2. The rolling apparatus according to claim 1, wherein an electric motor and a power transmission device for transmitting power to each of the rolling mills and rotating each of the rolling rolls are provided for each of the rolling mills. .