JP3394729B2 - Roll mill - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rolling mill. More specifically, the present invention relates to a roll rolling machine for rolling and forming bar steel, wire rods, pipes and the like into products. In addition, the "product" in this specification is a concept including a steel bar, a wire rod, and a pipe.

[0002]

2. Description of the Related Art A material is rolled by a 4-roll mill or a 3-roll mill from four or three directions, and then repeatedly rolled by a multi-stage roll mill to gradually reduce the cross-sectional shape. , Finish to the desired shape and size. The roll rolling machine disclosed in Japanese Patent Laid-Open No. 4-71704 is one of typical examples of the above-mentioned 4-roll mill. In this conventional example, a spur gear is attached to each of four roll shafts, and a gear for transmitting power by meshing with the spur gear is arranged on the back side or front side of the housing.
Further, as shown in FIG. 10, four rolls 102 to 105 are driven by one input shaft 101.
Bevel gears 102b, 103b, 104b, 105b are attached to the respective side surfaces of the rolls 102, 103, 104, 105 of the book, and the driving force is sequentially transmitted through the bevel gears 102b to 105b. In each of the conventional examples, since the gear drive mechanism is incorporated inside the housing, the structure is extremely complicated and the cost of the housing is high.

[0003]

On the other hand, in a tandem rolling mill such as a stretch reducer having a mill housing of 20 stands or more, it is necessary to prepare a spare housing according to the product size in addition to the housing with a main body. There are over 100 housings. Therefore, if all of the housings include the gear drive mechanism as in the conventional example, the total equipment cost becomes enormous.

In view of the above circumstances, the present invention has an object to make the housing compact and reduce the cost in a tandem rolling mill composed of a large number of rolling stands.

[0005]

According to a first aspect of the present invention, there is provided a roll rolling machine comprising: a roll unit, which holds a plurality of rolls arranged to roll a raw material, in an inner housing; and drive means for rotating the roll unit. consists of a drive unit which is held in a substantially ring-shaped outer <br/> side housing, wherein
The inner housing is attached and detached inside the outer housing.
The roll shaft of the roll unit and the transmission shaft of the drive unit are fixed to each other and are coupled to each other via a coupling coupling that can be separated and coupled. Rolling machine according to claim 2 is the invention of claim 1, wherein the inner housing of the roll unit has, on its outer periphery is formed with positioning portions of the four locations, the outer housing of the drive unit, among its Four positioning portions are formed on the circumference, and the roll unit is positioned with respect to the drive unit by bringing the positioning portion of the inner housing into contact with the positioning portion of the outer housing. And According to a third aspect of the present invention, in the roll rolling machine according to the second aspect, the mounting means of the roll unit to the drive unit is:
A stopper formed on one side of the outer housing so as to project inward from an inner edge of the outer housing, and on the other side of the outer housing, an inner edge of the outer housing and an outer portion of the inner housing. It is characterized in that it is composed of a backing plate that is bridged between the end edge and a fastening means that fastens the corresponding plate to the outer housing.
According to a fourth aspect of the present invention, in the roll rolling machine according to the first aspect, the inner housing has a half-divided structure including a front side section and a back side section, and the front and back housings are connected to each other so that each roll is Can hold,
Each roll can be taken out by separating the both housings. According to a fifth aspect of the present invention, in the roll rolling machine according to the first aspect of the invention, the outer housing has a half-divided structure including a front housing and a back housing, and the driving means is formed by connecting the front and back housings. It is characterized in that it can be held and the drive means can be separated and taken out by separating the front and back housings. The rolling mill according to claim 6, wherein the inner housing has four positioning portions,
Further, each of the four positioning portions of the outer housing has an abutting surface capable of positioning the inner housing in the vertical and horizontal directions with respect to the outer housing and positioning around the pass line.

According to the invention of claim 1, the roll unit and the drive unit can be assembled and arranged on the rolling mill, and the roll unit and the drive unit can be separately stored and managed by separating them by the coupling coupling. The roll unit required for multi-size rolling has almost no maintenance because it does not have a drive mechanism, and a large number of roll units (for example,
Even if the unit is prepared, the cost can be reduced significantly. In addition, the number of drive units required for the main body rolling mill (for example, 20 units) and for the standby stand (for example,
Since only 20 units need to be prepared, the total equipment cost can be significantly reduced. Furthermore, unlike the prior art drive mechanism built-in type, the drive unit does not need to disassemble the drive unit each time rolls are replaced, so roll replacement can be performed in an extremely short time and there is no risk of damaging the drive unit. In addition, since the drive unit can be lubricated to a complete package unit, it is not necessary to replace it every time the roll unit is replaced. According to the second aspect of the present invention, the roll unit can be accurately positioned in the up-down direction and the left-right direction with respect to the drive unit simply by bringing the positioning portion of the inner housing into contact with the positioning portion of the outer housing, and the ring-shaped outer portion Since the housing has a strong resistance to external force in the radial direction, rolling accuracy is improved. According to the invention of claim 3, since the inner housing can be inserted and fixed in the outer housing by the contact plate and the stopper, the restraint force of the roll unit with respect to the drive unit is strong and the displacement in the pass line direction does not occur. Accuracy is improved. According to the invention of claim 4, the rolls can be taken out only by separating the front and back sections, so that the rolls can be easily replaced. Also,
Since rolls can be easily exchanged, even if you do not prepare the number of roll units according to the total rolling size, you can use a smaller number of roll units and replace all the rolls to accommodate all rolling sizes. The cost can be reduced. According to the invention of claim 5, the drive means can be separated and assembled only by separating the front side section or the back side section, so maintenance and inspection can be performed very easily. Claim 6
According to the invention, since the positioning of the inner section with respect to the outer section can be performed not only in the vertical and horizontal directions but also in the rotational direction around the pass line, an unreasonable force is applied to the coupling coupling connecting the drive unit and the roll unit. No, you can drive smoothly.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a front view of a drive unit and a roll unit in a roll rolling machine according to an embodiment of the present invention, FIG. 2 is a front view of the drive unit without a front side section, and FIG. 3 is a front view of a roll unit. FIG. 4 is a sectional view of the drive unit and the roll unit combined, FIG. 5 is a partially enlarged view of the drive unit and the roll unit combined, and FIG. 6 is a plan view of the coupling coupling. FIG. 7 is a front view of the roll rolling machine of the present embodiment in an assembled state, FIG. 8 is a front view of a vertical horizontal roll excluding the front side section, and FIG. 9 is a front view of the inclined roll excluding the front side section. is there.

First, a four-roll mill in which the embodiment of the present invention is applied to vertical and horizontal rolls will be described. Figure 1
The figure (A) shows the drive unit A, and the figure (B) shows the roll unit B. The drive unit A includes an outer housing 3 including a front section 3a and a back section 3b, which are formed in a split mold, and a drive unit (described later) housed and held in the outer housing 3. In FIG. 1, the back side section 3b is not visible and the front side section 3a
Only shown. The outer housing 3 is substantially ring-shaped, and the positioning portions 14 that are formed flat are provided at four positions on the upper, lower, left, and right sides of the inner circumference of the outer housing 3. The roll unit B also has an inner housing 13 including a front side section 13a and a back side section 13b which are configured in a split type.
And four rolls 1 housed and held in it. In FIG. 1, the back section 13b is not visible and only the front section 13a is shown. The inner housing 13 has a substantially quadrangular shape, and flatly formed positioning portions 15 are provided at four corners on the outer periphery thereof.

FIG. 2 shows the drive unit A. Substantially ring-shaped outer housing 3 (rear section 3b shown)
A large-diameter ring-shaped driving bevel gear 4 is disposed in the inside (only shown). The outer diameter of the driving bevel gear 4 is slightly smaller than the inner diameter of the outer wall of the outer housing 3, and is arranged concentrically with the pass line.
It can be a ring-shaped gear with a considerably large diameter. Also,
The inner diameter of the driving bevel gear 4 is larger than the distance between the outer ends of the four rolls 1. An input shaft mechanism 5 includes an input shaft 6 and an input bevel key 7 attached to the input shaft 6.
It consists of When the input shaft 6 is rotated by a drive motor and a speed reducer (both not shown), the drive bevel gear 4 is rotated around the pass line. A transmission mechanism 8 includes a transmission bevel gear 10 that is rotated by meshing with the drive bevel gear 4 and a first transmission shaft 1.
It is composed of the first and second transmission shafts 12 and the like. The rolls 1 are rotationally driven by the transmission mechanism 8. At the end of the second transmission shaft 12, a coupling coupling 4 described later is provided.
Zero halves are attached.

FIG. 3 shows a roll unit B in which a pair of horizontal rolls 1 and 1 and a pair of vertical rolls 1 and 1 are assembled in the inner housing 13 (only the back section 13b is shown in the figure). There is. That is, this roll unit B is a four roll unit. The four rolls 1 are arranged so that the material can be rolled, and the rod groove of each roll 1 can be used to roll-form a rod wire or a pipe. A roll shaft 2 is fixed to the center of each roll 1, and each roll shaft 2 is rotatably supported by bearings held by a front section 13a and a back section 13b.
A coupling coupling 4 to be described later is provided at the end of the roll shaft 2.
Zero halves are attached.

As shown in FIG. 4, the outer housing 3
Is composed of a front side section 3a and a back side section 3b, and by connecting these, a driving means described later can be held. Further, the outer housing 3 is provided with mounting means for fixing the inner housing 13. That is, the stopper 16 protruding inward from the inner end edge (eg, the positioning portion 14) of the back side section 3b corresponding to one side of the outer housing 3 is formed, and the inner housing 13 is placed inside the outer housing 3. When inserted, the movement in the pass line direction is restricted by the stopper 16. On the other hand, a backing plate 17 that is bridged between the inner and outer edge (for example, the positioning portion 14) of the front side section 3a corresponding to the other side of the outer housing 3 and the outer edge (for example, the positioning portion 15) of the inner housing 13. Is provided, and the contact plate 17 is connected to the outer housing 3 by a bolt or the like as a fastening means.
Alternatively, it can be fixed to the inner housing 13.

The drive means is mainly composed of a drive bevel gear 4 and a transmission mechanism 8. The drive bevel gear 4 is composed of two bevel gears, a front drive bevel gear 4a and a back drive bevel gear 4b. Then, the bevel gears 4a, 4b for driving both of these are provided.
Is rotatably attached to each of the front housing 3a and the back housing 3b via bearings 31. The input shaft 6 is supported by a bearing 32 in the middle thereof and a bearing 33 at an inner end thereof, and is rotatable with respect to the outer housing 3. The input bevel gear 7 attached to the input shaft 6 meshes with the front and back two drive bevel gears 4a and 4b, and they rotate in opposite directions.

As shown in FIGS. 4 and 5, the transmission mechanism 8
The details of the transmission bevel gear 10 and the transmission shaft mechanism that configure the above are configured as follows. The first transmission shaft 11 is rotatably supported by bearings 34 and 35.
A small diameter transmission bevel gear 10 and a first cylindrical gear 21 are attached to the transmission shaft 11. This transmission bevel gear 10
Is rotated by the driving bevel gear 4 as described above,
The first transmission shaft 11 is rotated. On the other hand, the second transmission shaft 1
2 is provided parallel to the first transmission shaft 11 and is rotatably supported by bearings 36 and 37. A second cylindrical gear 22 is attached to the second transmission shaft 12, and the second cylindrical gear 22 meshes with the first cylindrical gear 21. The second transmission shaft 12 is attached to and detached from the coupling 40.
Is connected to the roll shaft 2. In addition, the first and second
The cylindrical gears 21 and 22 may be spur gears or helical gears.

As shown in FIG. 8, three rolls 1 out of the four rolls 1 are driven by the transmission mechanism 8.
As for the roll 1 closest to the input shaft 6, since the input shaft 6 is arranged at the place where the first transmission shaft 11 should be arranged, the roll 1 is attached to the input shaft 6 without providing the first transmission shaft. The transmission mechanism 8a configured to transmit the rotational drive from the first cylindrical gear 21 to the second transmission shaft 12 is adopted.

FIG. 6 shows an example of the coupling coupling 40. A spline 41 is formed at the tip of the second transmission shaft 12, and a coupling half body 42 is slidably fitted in the spline 41, and a coupling half body 43 is formed on the roll shaft 2 as a mating member.
Is fixed, and the coupling halves 42, 43 are coupled with each other by meshing teeth or dogs. Reference numeral 44 is a set bolt of the coupling half body 42 on the sliding side.
Since the coupling halves 42, 43 are separated by retracting the coupling half 42 on the sliding side, the roll unit B can be connected to or disconnected from the drive unit A. When the roll unit B is connected to the drive unit A, the coupling half 42
By pushing out and engaging with the mating coupling half 43, the power of the drive unit A can be transmitted to the roll unit B. The coupling 40 is not limited to the above example, and any type may be used as long as it is detachable.

7 and 8 show a state in which the drive unit A and the roll unit B are combined. This connected state is obtained as follows. That is, as shown in FIG. 7, the ring-shaped outer housing 3 of the drive unit A is
The inner housing 13 of the roll unit B is put inside.
In this state, the four positioning parts 1 of the outer housing 3
The four positioning portions 15 of the inner housing 13 come into contact with the inner housing 13 to ensure the positioning in the up-down direction and the left-right direction. At the same time, as shown in FIG. 4, the inner housing 13 serves as a stopper for the outer housing 3 (back side section 3b). Accepted at 16. Then, the contact plate 17 is passed between the positioning portion 14 of the outer housing 3 and the positioning portion 15 of the inner housing 13, that is, at the four abutting positions, and the contact plate 17 is fastened to the outer housing 3 by a fastener such as a bolt. It is firmly fastened to the inner housing 13. As a result, the roll unit B is positioned relative to the drive unit A in the pass line direction, and is restrained immovably. Then, by connecting the connection couplings 40 to each other,
Both units A and B are connected to the operating state.

In the above state shown in FIG. 8, each roll 1 can be rotated by rotating the driving bevel gear 4 as described above. Then, the inner housing 13 is provided with respect to the outer housing 3 both in the radial direction of the pass line (vertical direction and horizontal direction) and in the pass line direction.
Since it is constrained to be immovable, rolling accuracy can be improved.

As described above, in the roll rolling mill of this embodiment, the roll unit B and the drive unit A can be attached and arranged on the rolling mill, and when separated by the coupling coupling 40, the roll unit B and the drive unit A are separated. Can be stored and managed in. Since the roll unit B required for multi-size rolling does not have a drive mechanism, it is almost maintenance-free and the cost can be significantly reduced even if a large number (for example, 100 or more) units are prepared. Further, the number of drive units A required for the main body rolling mill (for example, 20
Stand) and standby stand (for example, 20 stands) only, so the total equipment cost can be significantly reduced.
Further, in the drive unit A, unlike the prior art drive mechanism built-in type, since it is not necessary to disassemble the drive unit each time the roll is replaced, the roll can be replaced in a very short time and there is a risk of damaging the drive unit. There is no need to replace the roll unit each time the roll unit is replaced because the drive unit can be completely lubricated. Further, since the rolls 1 can be taken out only by separating the front and back sections of the inner housing 13 from each other by separating 13a and 13b, the rolls can be easily exchanged. Further, since the rolls can be easily replaced, it is possible to prepare the number of roll units B corresponding to all rolling sizes,
Roll 1 with a smaller number of roll units B
Since all rolling sizes can be supported by exchanging only
Equipment costs can be reduced. Further, since the drive means can be separated and assembled only by separating the front side section 3a or the back side section 3b of the outer housing 3, maintenance and inspection can be performed very easily.

FIG. 9 shows an inclined roll in which four rolls 1 are arranged at an inclination. In this roll arrangement, since the transmission mechanism 8 does not exist in the horizontal position, all the rolls 1 are driven via the first transmission shaft 11 and the second transmission shaft 12. Therefore, only the input bevel gear 7 is attached to the input shaft 6, and it is not necessary to attach the first cylindrical gear. In the prior art, since the drive shaft of this inclined roll extends obliquely upward, the connecting portion with the speed reducer is bulky. However, in the present invention, since the input shaft 6 can be arranged horizontally as shown in the figure, the connecting portion The structure can be made compact with a low height.

Although the above-mentioned embodiments are all related to the 4-roll mill, the same transmission mechanism 8 and input shaft mechanism 5 can be used for a 3-roll mill. That is, three transmission mechanisms 8 are provided in association with three rolls arranged at 120 ° intervals around the pass line,
It can be rotationally driven using the same driving bevel gear 4. Moreover, in this case, since the input shaft of the input shaft mechanism can be arranged in the horizontal position, the connecting portion with the drive speed reducer does not become bulky.

[0021]

According to the invention of claim 1, since the roll unit required for multi-size rolling does not have a drive mechanism,
It is almost maintenance-free, and the cost can be greatly reduced even if many units are prepared. Further, since it is necessary to prepare only the required number of drive units for the main body rolling mill and for the standby stand, the total equipment cost can be significantly reduced. Further, since it is not necessary to disassemble the drive unit every time the roll is replaced, the roll can be replaced in a very short time and there is no risk of damaging the drive unit. Further, since the drive unit can be completely lubricated, it is not necessary to replace the roll unit each time. According to the second aspect of the present invention, the roll unit can be accurately positioned in the up-down direction and the left-right direction with respect to the drive unit simply by bringing the positioning portion of the inner housing into contact with the positioning portion of the outer housing, and the ring-shaped outer portion Since the housing has a strong resistance to external force in the radial direction, rolling accuracy is improved. According to the invention of claim 3, since the inner housing and the outer housing are fastened via the contact plate,
The binding force of the roll unit to the drive unit is strong,
Since the displacement in the pass line direction does not occur, the rolling accuracy is improved. According to the invention of claim 4, the rolls can be taken out only by separating the front and back sections, so that the rolls can be easily replaced. Also, since rolls can be easily replaced, it is possible to support all rolling sizes by replacing only the rolls by using a smaller number of roll units without preparing the number of roll units corresponding to all rolling sizes. The equipment cost can be reduced. According to the invention of claim 5, the drive means can be separated and assembled only by separating the front side section or the back side section. Therefore, maintenance and inspection can be performed very easily. According to the invention of claim 6, the positioning of the inner housing with respect to the outer housing can be performed not only in the vertical and horizontal directions but also in the rotational direction around the pass line, which is not possible for the coupling coupling for coupling the drive unit and the roll unit. You can drive smoothly without applying force.

[Brief description of drawings]

FIG. 1 is a front view of a drive unit A and a roll unit B in a roll rolling mill according to an embodiment of the present invention.

FIG. 2 is a front view of the drive unit A without a front section.

FIG. 3 is a front view of a roll unit B without a front section.

FIG. 4 is a side view showing a state in which a drive unit and a roll unit are combined.

FIG. 5 is a partially enlarged view of a state in which a drive unit and a roll unit are combined.

6 is a plan view of the coupling coupling 40. FIG.

FIG. 7 is a front view of an assembled state in the roll rolling machine of the present embodiment.

FIG. 8 is a front view of the vertical horizontal roll without a front section.

FIG. 9 is a front view showing a state in which a front side section of the inclined roll is removed.

FIG. 10 is a front view of a conventional roll rolling machine.

[Explanation of symbols]

1 roll 2 roll axis 3 housing 4 Drive bevel gear 40 coupling coupling A drive unit B roll unit

─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Insho Akira 5-9-11 Kitashinagawa, Shinagawa-ku, Tokyo Sumitomo Heavy Industries, Ltd. (72) Inventor Takaaki Toyooka 1-1, Kawasaki-cho, Handa-shi, Aichi Address Kawasaki Steel Co., Ltd. Chita Works (72) Inventor Motoaki Itaya 1-1 Kawasaki-cho, Handa-shi, Aichi Prefecture Kawasaki Steel Co., Ltd. Chita Works (72) Inventor Akira Ito 1-1, Kawasaki-cho, Handa-shi, Aichi Kawasaki Steel Co., Ltd. Chita Works (72) Inventor Toshio Onishi 1-1, Kawasaki-cho, Handa City, Aichi Prefecture Kawasaki Steel Co., Ltd. Chita Works (72) Inventor, Koji Sugano 1-1, Kawasaki-cho, Handa City, Aichi Prefecture Kawasaki Steel Works Inside Chita Works (72) Inventor Mikio Odaka 1-1 Kawasaki-cho, Handa-shi, Aichi Kawasaki Steel Works Inside Chita Works (72) ) Inventor Shinki Tanaka, 1-1, Kawasaki-cho, Handa-shi, Aichi Kawasaki Steel Co., Ltd. Chita Works (56) References JP-A-7-9011 (JP, A) JP-A-10-296308 (JP, A) Special JP-A-55-77912 (JP, A) JP-A-10-156406 (JP, A) JP-A-5-96308 (JP, A) JP-A-11-104706 (JP, A) JP-A-2000-271619 (JP , A) JP 2000-140915 (JP, A) Actual development 5-201 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 35/14 B21B 13/00 B21B 13 / 12 B21B 31/02

Claims (6)

(57) [Claims] 1. A plurality of materials arranged so that the material can be rolled.
A roll unit that holds the roll in the inner housing, Drive means for rotationally driving the roll unit, Rin
RuggedThe drive unit held by the outer housing
,The inner housing fits inside the outer housing.
It is detachably fixed and Transmission between the roll shaft of the roll unit and the drive unit
The drive shaft is connected via a connecting coupling that can be separated and connected.
The rolling mill is characterized by being 2. The inner housing of the roll unit comprises:
Its outer periphery is formed with positioning portions of the four locations, the outer housing of the drive unit, the positioning unit of the four locations on the inner periphery of that are formed, positioning the positioning portion of the inner housing of the outer housing The roll rolling machine according to claim 1, wherein the roll unit is positioned with respect to the drive unit by abutting against a section. 3. A stopper for attaching the roll unit to the drive unit, the stopper being formed on one side of the outer housing so as to project inward from an inner end edge of the outer housing, and the outer housing. On the other side, a pad plate provided between the inner edge of the outer housing and the outer edge of the inner housing, and a fastening means for fastening the plate to the outer housing. The rolling mill according to claim 2. 4. The inner housing has a half-divided structure consisting of a front side section and a back side section, the rolls can be held by joining the front and back housings, and the two housings can be separated to separate the rolls. The roll rolling machine according to claim 1, wherein each roll can be taken out. 5. The outer housing has a half-divided structure composed of a front housing and a back housing, the driving means can be held by connecting the front and back housings, and the front and back housings can be separated from each other. The rolling mill according to claim 1, wherein the driving means can be separated and taken out. 6. The four positioning portions of the inner housing and the four positioning portions of the outer housing are capable of positioning the inner housing in the vertical and horizontal directions with respect to the outer housing and positioning around the pass line. The rolling mill according to claim 2, having a contact surface.