JPH0760306A - Rolling device - Google Patents

Abstract

PURPOSE: To eliminate the need for holding guides and to enable the shortening of the time required for an order change and the simplification of a structure. CONSTITUTION: The positions holding the pass line of the stand 24 of the rolling mill 12 are bored with a pair of through-holes 24a. A pair of eccentric members 26 are freely turnably inserted apart a prescribed spacing axially in the respective through-holes 24a. The eccentric members 26 are bored with eccentric through-holes 26a. A rolling shaft 28 onto which a rolling roll 13 is fitted is freely turnably inserted and supported into the eccentric through-holes 26a. A pair of regulating shafts 32 are freely turnably disposed in the stand 24. Worm 34 intermeshed with the tooth parts 26b of the respective eccentric members 26 are integrally rotatably fitted onto the regulating shafts 32. Gears commonly intermeshed with the regulating gears are disposed at the shaft ends of both regulating shafts 32. The position of the rolling roll 13 is changed via the eccentric members 26 by turning the regulating gears.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling apparatus in which two rolling mills for rolling a material to be rolled such as a steel bar and a wire rod are arranged in series, and the distance between the centers of the rolling rolls arranged in both rolling mills is large. The present invention relates to a rolling apparatus in which the means for guiding the material to be rolled between the two rolling mills can be made unnecessary by setting a short length.

[0002]

2. Description of the Related Art A plurality of rolling mills are arranged in series along a pass line of a material to be rolled such as a steel bar or a wire rod, and the material to be rolled is passed through these rolling mills to roll the material to a required size. The equipment is known. Each rolling mill is provided with a pair of rolling rolls in a housing so as to be rotatable, and a required material is rolled by passing a material to be rolled through a roll hole die (caliber) formed between the both rolls. In the stretch rolling of the material to be rolled in the rolling equipment, the roll hole type is an oval-round type in which an oval hole type and a round hole type are sequentially arranged alternately, or a rhombus type and a square hole type are alternately arranged. The rhombus-corner method is properly used. Further, in the finish rolling performed at the final stage of rolling, a round hole type as close to a perfect circle as possible is used in the oval-round system.

In the above-mentioned oval-round system, a holding guide made up of rollers or the like is installed on the inlet side of the material to be rolled into the round hole type, and the material to be rolled is guided to the round hole type in a correct posture for accurate rolling. I am trying to do. Also in the case of the rhomboidal method, a similar holding guide for the material to be rolled is installed on the entrance side of the square hole die in order to secure a high surface reduction rate.

Further, in the above rolling mill, in order to change the cross-sectional dimension of the material to be rolled, it is indispensable to provide a reduction device for adjusting the gap between the rolling rolls facing each other. This reduction device is configured to move the other rolling roll closer to and away from one rolling roll arranged at a fixed position.
That is, a stand having one rolling roll rotatably provided in the housing is movably arranged, and the roll gap is adjusted by moving the stand by an appropriate driving means.

[0005]

The holding guide attached to the rolling mill moves to a proper position in accordance with the adjustment of the gap between the rolling rolls by the reduction device provided in the rolling mill. Adjustment is necessary, and there is a drawback that the time required for adjustment due to order change etc. becomes long. Further, defective guides of the holding guides lead to defective rolled products, so that maintenance of bearings, surface flaw inspection of rollers, inspection of rotation condition, etc. must be frequently performed. Further, it is pointed out that since the holding guide is provided between the rolling mills, the structure becomes complicated and the equipment cost increases.

In the above rolling mill, the housing posts for supporting the stand in the rolling down device are located on the inlet side and the outlet side of the material to be rolled, so that the thickness of the post corresponds to the upstream and downstream rolling mills. The distance between and becomes longer. Moreover, since the above-mentioned holding guides are installed between the rolling mills, there is a problem that the total length of the equipment becomes long and the installation space in the factory becomes large.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned various problems, and it has been proposed to solve the problems by reducing the distance between the axial centers of adjacent rolling rolls. It is an object of the present invention to provide a rolling apparatus that can achieve compactness and can shorten the time required for order change and simplify the structure by eliminating the need for a holding guide.

[0008]

[Means for Solving the Problems] In order to overcome the above-mentioned problems and preferably achieve the intended purpose, a rolling apparatus according to the present invention comprises:
A rolling mill comprising two rolling mills arranged such that the rotational axes of adjacent rolling rolls are displaced at an angle of 90 °, and the distance between the axial centers of the rolling rolls in both rolling mills is It is characterized in that the diameter is set to 1.2 times or less the diameter of the rolling roll.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a rolling apparatus according to the present invention will be described with reference to the preferred embodiments with reference to the accompanying drawings. In the embodiment, the case where the rolling device 10 is used as the sizing mill used for the finish rolling in the rolling equipment shown in FIG. 12 will be described, but the sizing mill can be appropriately adopted for the intermediate train. As shown in FIGS. 2 and 3, the rolling apparatus 10 includes three rolling mills 12, 14, 16 arranged in series, and each rolling roll 1 arranged in each of the rolling mills 12, 14, 16.
3, 15 and 17 are arranged such that the rotational axes of the adjacent rolling rolls are alternately deviated by 90 °. In the embodiment, as shown in FIG. 7, the first rolling mill 12 on the upstream side in the feeding direction of the material 20 to be rolled and the third rolling mill 16 on the downstream side.
Of the rolling rolls 13 and 17 arranged in
The axis of 5 is set vertically. In addition, the rolling rolls 1 of the three rolling mills 12, 14, 16 that constitute the rolling mill 10
3, 15 and 17 are reduction gears 1 driven by one drive motor 18.
It is configured to be driven via 9.

Then, the first rolling mill 12 and the second rolling mill 1
The distance P between the axial centers of the rolling rolls 13 and 15 with respect to 4 is set to 1.2 times or less the diameter R of the rolling rolls 13 (15, 17). By shortening the distance P between the axes of the adjacent rolling rolls 13 and 15 as described above, the material to be rolled can be rolled without providing a guide means for the material 20 to be rolled between the rolling mills 12 and 14. It is possible to accurately guide and supply the fourteen hole types. By adopting the mechanism described later as a rolling down device for adjusting the gap between the facing rolling rolls 13, 13/15, 15/17, 17 in the rolling mills 12, 14, 16, the rolling rolls 13, 15 Since it is possible to set the inter-axis distance P of the rolling center to be short, the configuration of the rolling mills 12, 14, 16 will be described next.

FIG. 1 is a plan view showing a first rolling mill 12 and a second rolling mill 14 in a rolling mill 10 in a cross-sectional view. The first rolling mill 12, the second rolling mill 14 and the third rolling mill are shown. The configuration of 16 is different only in the rotational axes of the adjacent rolling rolls 13, 15, 17 alternately by 90 °, and other configurations are substantially the same, so only the configuration of the first rolling mill 12 will be described. The same members of the second rolling mill 14 and the third rolling mill 16 are designated by the same reference numerals, and detailed description thereof will be omitted.

The housing 22 of the rolling apparatus 10 shown in FIG.
As shown in FIG. 4, the stand 24 arranged in the position of the stand 24 has a pass line P of the material 20 to be rolled in a portion deviated to the downstream side.
A pair of through holes 24a, 24a are formed at upper and lower positions sandwiching L in a direction intersecting with the pass line PL. Each through hole 2
As shown in FIG. 1, a pair of eccentric members 26, 26 are rotatably mounted in the shaft 4a at predetermined intervals in the axial direction, and both eccentric members 26, 26 are provided with respect to the shaft center of the through hole 24a. Eccentric through holes 26a, 26a are formed by displacing the shaft center.
The rolling shaft 28 is rotatably inserted through and supported by the eccentric through holes 26a and 26a via bearings 30 and 30, respectively. The rolling roll 13 is externally fitted to the rolling shaft 28 so as to integrally rotate at a position facing between the eccentric members 26, 26.
The material to be rolled 20 is passed through a die formed by rolling rolls 13, 13 which are paired up and down.
The finish rolling of 0 is done. Rolling axis 28
Is the eccentric through hole 2 of the eccentric member 26, as clearly shown in FIG.
The shaft center C ₁ is set to deviate by a required amount from the shaft center C ₂ of the eccentric member 26 by being inserted into and supported by the 6a, and both eccentric members 26, 26 are moved in the forward and reverse directions by a mechanism described later. The rotation of the rolling shaft 28 causes the axis C ₁ of the rolling shaft 28 to be displaced.

Rolling shafts 28, 2 in the stand 24
A pair of adjusting shafts 32, 32 intersecting with the rolling shafts 28, 28 are provided on the upstream side of the position where the rolling shafts 28, 28 are arranged.
It is rotatably arranged at a position corresponding to the eccentric members 26, 26 that are fitted onto the outer circumference 8. As shown in FIG.
As shown in FIG. 6, the worms 34 are externally fitted to the rolling shafts 28, 28 at positions corresponding to the respective eccentric members 26 located on the right side or the left side of the rolling rolls 13, 13 which are fitted on the rolling shafts 28, 28, respectively. There is. Each worm 34 is set so as to mesh with the tooth portion 26b formed on the outer periphery of the corresponding eccentric member 26. The two worms 34, 34 arranged on each adjusting shaft 32 are set so that their twisting directions are opposite to each other, and correspond to the eccentric members 26, 26 externally fitted on the same rolling shaft 28. Worm 34,34
The twist directions are set to be the same. Further, as shown in FIG. 5, a gear 36 is attached to the shaft ends of both adjusting shafts 32, 32.
Are arranged so that they can rotate integrally, and both gears 36, 36 are
It is commonly meshed with an adjusting gear 38 pivotally supported by the stand 24. That is, when the adjusting gear 38 is rotated in the forward and reverse directions by an appropriate driving means such as a motor, the pair of adjusting shafts 32, 32 is rotated in the same direction, and the corresponding eccentricities are provided via the worms 34, 34. The members 26, 26 are rotated. As a result, the distance between the axes of the rolling shafts 28, 28 supported by the pair of eccentric members 26, 26 changes (FIGS. 9 and 11), and the gap between the opposing rolling rolls 13, 13 is adjusted. This is done (FIGS. 8 and 10).

As described above, in the first rolling mill 12 which employs the rolling-down device using the eccentric member 26, as shown in FIG. 4, it is arranged on the downstream side of the stand 24 (on the side where the rolling shaft 28 is eccentrically arranged). The thickness is set extremely thin. On the other hand, in the second rolling mill 14, as shown in FIG. 1, the rolling shaft 28 is eccentrically arranged on the upstream side of the stand 24, whereby the thickness of the upstream side of the stand 24 is set to be extremely thin. And the 1st rolling mill 12 and the 2nd rolling mill 14 are
The rolling rolls 13 of both rolling mills 12 and 14 are arranged so as to be adjacent to each other so that the sides whose thickness dimensions are set to be thin face each other.
It becomes possible to set the distance P between the axes of 15 to 1.2 times or less of the diameter R of the roll 13 (15). The second
Since the stand surfaces of the rolling mill 14 and the third rolling mill 16 on the side where the rolling-down device of the second rolling mill 14 is disposed face each other, the distance between the axes of the rolling rolls 15 and 17 is the diameter of the roll 13. Although it is longer than 1.2 times R, it can be suppressed to 2 times or less.

[0015]

The operation of the rolling apparatus according to this embodiment having the above-described structure will be described below. Figure 1
The material 20 to be rolled, which has been rolled on the upstream side in the rolling equipment shown in FIG. 2, is introduced into the first rolling mill 12 of the rolling mill 10 shown in FIG. The required rolling is performed by passing through a die defined between 13. The material 20 to be rolled is continuously fed to the second rolling mill 1
4 between the rolling rolls 15 and 15
Rolling is carried out by 5,15. At this time, the first rolling mill 12 and the second rolling mill 14 are
Since the distance P between the shaft centers is set to 1.2 times the diameter of the roll 13 or less, the material 20 to be rolled is formed into the hole shape of the second rolling mill 14 without providing the guide means unlike the prior art. Can be supplied accurately. Further, the rolling rolls 13 and 13 in the first rolling mill 12 also act as a guide means for the material 20 to be rolled, and twisting of the material 20 is effectively prevented.
Since the final one pass in finish rolling is set so that a skin pass is performed, the distance between the axes of the rolling rolls 15 and 17 between the second rolling mill 14 and the third rolling mill 16 is the roll diameter. However, the twist of the material to be rolled 20 can be sufficiently suppressed within an allowable range.

Next, the actual adjustment of the gap between the opposing rolling rolls in the rolling mill will be described for the first rolling mill 12. First, when rolling a material 20 to be rolled having a small diameter, as shown in FIG. 8, the gap between the facing rolling rolls 13, 13 in the first rolling mill 12 is set to a predetermined value, and both rolling rolls 13, 13 are rolled. Rotate in opposite directions.
At this time, the axis C ₁ of the rolling shaft 28 of the first rolling mill 12 and the axis C ₂ of the eccentric member 26 have the relationship shown in FIG. 9. Therefore, both rolling rolls 13, 13 of the first rolling mill 12
When the material 20 to be rolled is supplied in the meantime, the material 20 is supplied to the second rolling mill 14 after being subjected to required rolling.

Next, the rolling apparatus 10 is changed by changing the order.
When rolling the material 20 to be rolled having a large diameter, the adjusting gear 38 is rotated in the required direction by the driving means, and both adjusting shafts 38, 38 are rotated in the same direction. As shown in FIG. 4, the worms 34, 34 disposed on each adjusting shaft 32 are eccentric members 2 fitted on the upper or lower rolling shaft 28.
Since the tooth portions 26b and 26b of the gears 6 and 26 are meshed with each other, the eccentric members 26 and 26 are attached to the stand 2 as the adjustment shaft 32 rotates.
The inside of the through hole 24a of 4 is rotated in a required direction. Since the twisting directions of the worms 34, 34 arranged on the adjusting shafts 32, 32 are set as described above, the upper eccentric member 2
6, 26 and the lower eccentric members 26, 26 rotate in mutually opposite directions, and as shown in FIG. 11, the axis C _{1 of} the rolling shafts 28, 28 supported by the respective eccentric members 26, 26, The distance of C ₁ changes. As a result, as shown in FIG.
The gaps between the rolling rolls 13 and 13 which are fitted onto the outer surfaces 8 and 28 and face each other are widened. And the gap between the rolling rolls 13, 13 is
When the value set according to the size of the material 20 to be rolled is reached, the rotation of the adjusting gear 38 is stopped to complete the gap adjustment. Therefore, the material to be rolled 2 whose order is changed
When 0 is supplied to the first rolling mill 12, the material 20 is subjected to the required rolling by the opposing rolling rolls 13, 13.

Various arrangements of the rolls of each rolling mill in the rolling mill other than the illustrated embodiment can be assumed. For example, the axes of the rolls 13 and 17 of the first rolling mill 12 and the third rolling mill 16 may be vertical, and the axis of the roll 15 of the second rolling mill 14 may be horizontal. Further, in the embodiment, the case where the rolling apparatus is configured by three rolling mills has been described, but it goes without saying that it may be configured by only two rolling mills. Further, each rolling mill of the rolling mill may be driven by an independent drive motor.

[0019]

As described above, according to the rolling apparatus of the present invention, the distance between the axes of the rolling rolls in the adjacent rolling mills is set to 1.2 times or less the diameter of the rolling rolls. It is possible to effectively prevent twisting of the material to be rolled during rolling. Further, since it is not necessary to install a roller guide or the like as the material guiding means, the structure of the rolling device can be simplified and the cost can be kept low.
Moreover, there is an advantage that defective products due to the guide means are eliminated and complicated inspection work can be omitted. Moreover, since the apparatus can be made compact, the length of the entire rolling equipment can be shortened, and the space in the factory can be effectively used.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of essential parts in a rolling device according to a preferred embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the rolling device according to the embodiment.

FIG. 3 is a plan view of a rolling device according to an embodiment.

FIG. 4 is a vertical sectional front view of a first rolling mill in a rolling mill.

FIG. 5 is a schematic plan view of a first rolling mill in the rolling mill.

FIG. 6 is a schematic explanatory view showing a reduction device in the first rolling mill.

FIG. 7 is an explanatory diagram showing a roll arrangement of each rolling mill in the rolling mill according to the embodiment.

FIG. 8 is an explanatory diagram showing a relationship between rolling rolls facing each other in a state of rolling a material to be rolled having a small diameter.

9 is an explanatory diagram showing the relationship between the axis of the rolling shaft and the axis of the eccentric member in the state shown in FIG.

FIG. 10 is an explanatory diagram showing a relationship between rolling rolls facing each other in a state of rolling a material to be rolled having a large diameter.

11 is an explanatory diagram showing the relationship between the axis of the rolling shaft and the axis of the eccentric member in the state shown in FIG.

FIG. 12 is an explanatory diagram of rolling equipment in which a rolling device is arranged.

[Explanation of symbols]

 10 Rolling Equipment 12 First Rolling Machine 13 Rolling Roll 14 Second Rolling Machine 15 Rolling Roll 20 Rolling Material 24 Stand 24a Through Hole 26 Eccentric Member 26a Eccentric Through Hole 26b Teeth 28 Rolling Shaft 32 Adjusting Shaft 34 Worm PL Pass Line

Front Page Continuation (72) Inventor Keiwa Takai 13-1 Shikannondo West, Tashiro-cho, Chikusa-ku, Nagoya, Aichi (72) Inventor Hideo Kobayashi 1-6 Minamitsugaoka, Chita-shi, Aichi (72) Inventor Yoshio Kato 42 (72) Inventor Tatsuya Ishihama, 5 Omotesama, Ashi-cho, Akita-cho, Chita-gun, Aichi Prefecture 203 (72) Inventor Harold Woodrow United States 01532 Northboro, Massachusetts, USA Green street 100

Claims (3)

[Claims] 1. A rolling mill (10) comprising two rolling mills (12, 14) arranged such that the rotational axes of adjacent rolling rolls (13, 15) are offset at an angle of 90 °. It is characterized in that the center distance between the rolling rolls (13, 15) in both rolling mills (12, 14) is set to 1.2 times or less the diameter of the rolling rolls (13, 15). And rolling equipment. 2. The rolling mill (12, 14) is provided with a pass line (PL) of the material (20) at a position biased upstream or downstream in the feeding direction of the material (20) to be rolled in the stand (24). A pair of through holes (24a, 24a) formed at positions sandwiching the hole, and an eccentric through hole that is rotatably mounted in each of the through holes (24a) and that is eccentric from the axis of the through hole (24a). Eccentric member (2a)
6,26), the eccentric member (26) is rotatably inserted into the eccentric through hole (26a), the rolling roll (13, 15) is integrally rotatably fitted on the rolling shaft (28, 28) and a tooth portion formed on the outer periphery of each eccentric member (26) rotatably disposed downstream or upstream with respect to the through hole drilling position of the stand (24) in the material feeding direction. 26b) Gears (3
4) is equipped with an adjusting shaft (32) which is fitted so as to be integrally rotatable, and the adjusting shaft (32) is rotated in the forward and reverse directions to rotate each eccentric member (26) in the through hole (24a). The rolling apparatus according to claim 1, wherein the gap between the opposing rolling rolls (13, 13/15, 15) is adjusted by performing the above. 3. The rolling mill (12, 14) according to claim 2, wherein the two rolling mills (12, 14) are arranged adjacent to each other so that the through holes (24a) of each stand (24) are biased. Rolling equipment.