JPH04100610A - Rolling mill - Google Patents

Abstract

PURPOSE:To prevent the camber and slip-on of rolled stock and to enable the stable bite and pass of rolled stock by subsidiarily driving revolving the other side of a roll group with a motor as well as one side of the roll group which is driving revolved. CONSTITUTION:A rolled stock is held between roll groups which are respectively situated on the upside and downside of the rolled stock and also rolling work is executed by driving revolving one side of the roll group. At this time, the other side of the roll group is subsidiarily revolved with the motor 11 through a universal joint 14 and electromagnetic clutches 17, 37. Then, at the time of setting a gap between rolls and rolling, the rotational speed of the other side of roll group is properly controlled adapting to the rotational speed of one side of the roll group. Therfore, the camber and slip-on of rolled stock which is generated in the case the rotational speed of work roll is high are prevented and the stable bite and pass of rolled stock are enabled.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention not only drives and rotates one of the four rolls that are positioned to sandwich the rolled material, but also rotates the other roll auxiliary to perform rolling processing. Regarding the rolling mill, it is applicable to a single-side drive different diameter multi-stage cluster rolling mill.

<Conventional technology> Conventionally, when rolling metal materials such as steel materials, the rolled material is passed between a plurality of rolls installed in parallel in the vertical direction, and rolling processing is performed by the pressing force from these rolls. Multi-high rolling mills were known.

For example, a multi-stage cluster rolling mill as shown in FIG. 4 is one example.

As shown in FIG. 4, a small-diameter upper work roll 1 is disposed on the upper side of the passing surface of a rolled steel strip 1°, and this upper work roll 1 is connected to a pair of intermediate rolls. 2, the upper divided reinforcing roll 3a is divided into five parts in the roll axis direction.
.

3b and is supported in contact with it.

The intermediate roll 2 among these rolls 1, 2, 3a, and 3b is connected to an intermediate roll chock 103, which is a bearing box fitted to the intermediate roll outer chock 102 so as to be movable up and down.
Both ends are supported by the upper split reinforcing roll 3a.
.

3b is supported by a frame 6 fitted into the upper part of the housing 9 so as to be movable up and down.

On the other hand, at a position facing the upper work roll 1 with the rolled material 10 in between, the lower work roll 4 is supported at both ends by a lower work roll chock 107 that can move up and down, and
A lower reinforcing roll 5 supporting the lower work roll 4 is supported by a lower reinforcing roll chock 8 that is movable up and down.

That is, the multi-high rolling mill used to roll the rolled material 10 is as follows:
The upper work roll 1 and the lower work roll 4 are pressed and supported by the upper divided reinforcing rolls 3a and 3b, the intermediate roll 2, and the lower reinforcing roll 5 so that the upper and lower work rolls 1 and 4 form a predetermined crown shape. The structure is such that the lower work roll 4 is driven and rotated to allow the rolled material 10 to pass through.

Therefore, by driving and rotating only the lower work roll 4, the rotational speed of the lower work roll 4 and the rotation speed of the upper work roll 1 rotated by the contact with the rolled material 10 as the rolled material 10 passes during the rolling operation. When a difference of several percent occurs between the rotational speed and the rolling load decreases, upper work roll 1, upper work roll chock 101, middle 18
o-ru 2, intermediate roll chock 103a, and upper split reinforcing roll 3a.

3b, frame 6, etc. can be easily reassembled into one roll.

In addition, since only the lower work roll 4 is driven and rotated as shown below, when setting the inter-roll gap to provide an appropriate gap between the rolls, it is necessary to set the upper work roll 1 and the lower work roll before rolling. Both work rolls are brought into contact with the work roll 4 and rotated, and just before the start of rolling, the upper work roll 1 and the lower work roll 4 are separated by a hydraulic lowering device (not shown) to set a predetermined gap between the rolls. It is said that

<Problems to be Solved by the Invention> When setting the inter-roll gap in the above-mentioned rolling mill, there is a problem in the time between the separation of the upper work roll 1 and the lower work roll 4 and the time when rolling actually starts. It has a predetermined time. For this reason, the roll group on the side that is not driven and rotated is a roll group on the non-drive side (upper m work roll 1, intermediate roll 2, and upper split reinforcing rolls 3a and 3b) causes a speed attenuation from the set speed due to friction of the seal portion, etc.

As a result, when the rolled material 10 is inserted, a rotational speed difference that is larger than an appropriate speed difference occurs between the work rolls 1 and 4 on the driving side and the non-driving side, which causes the rolled material 10 to warp or hit. becomes.

The present invention was proposed to solve the above-mentioned problems, and compensates for the large speed attenuation that occurs from the setting of the gap between rolls to the start of rolling, and prevents the occurrence of warpage and bumps in the rolled material. The purpose is to prevent

Means for Solving the Problems> In the rolling mill according to the present invention, a roll group including at least a work roll that contacts and rolls a rolled material and a reinforcing sail that presses and supports the outer circumferential surface of the work roll, In a rolling mill in which one of the roll groups is driven and rotated and is located so as to correspond to the upper and lower surfaces of the material, a motor that auxiliarily drives and rotates the other roll group while controlling the speed thereof; a universal joint that transmits drive rotation to the other roll group; and a clutch that is located between the motor and the universal joint and that transmits the drive rotation of the motor to the universal joint in an intermittent manner. It is characterized by this.

Function> The rolled material is sandwiched between roll groups located on the upper surface side and the lower surface side, respectively, and rolling work is performed by driving rotation of one of the roll groups.

At this time, the other roll group is also auxiliary rotated by the motor via the universal joint and clutch.

Therefore, when setting the gap between rolls and during rolling,
The rotation speed of the other roll group is appropriately controlled in accordance with the rotation speed of one roll group.

Example of implementation FIG. 1 shows a first embodiment of a rolling mill according to the present invention.

This embodiment is shown in FIGS. 2 and 4, and will be described based on these figures.

Note that the same members as those described in the related art are given the same reference numerals and redundant explanation will be omitted.

As shown in FIGS. 1 and 2, the upper spindle (not shown) of the four-high rolling mill is removed, and a multi-stage cluster roll 110 as shown in FIG. 4 is inserted into the upper spindle side. After inserting this multistage cluster roll 110, it is mounted on the pinion stand 15 that transmits power to the lower work roll 4 via the spindle 16 and on the foundation 22, and is integrated with the mount 12 and the mount 12, which can be easily removed. A small motor 11 is installed.

Furthermore, a first gear mechanism 13a and a second gear mechanism 13b connected thereto are installed on the pedestal 12, and this first gear mechanism 13a is connected to a small motor for driving via an electromagnetic clutch 17. 11, and transmits and releases the drive rotation of the small motor 11 by the attachment/detachment operation of the electromagnetic clutch 17, and also has a gear mechanism 13a.

13b decelerates the rotation of the small motor 11.

Furthermore, a pinion stand 21 is installed on the pedestal 12, one end of which is connected to the second gear mechanism 13b, and the other end of the universal joint 14 is connected to the base end. The distal end of the universal joint 14 is connected to a pair of intermediate rolls 2 and supported by a coupling support 20, as shown in FIG. The cylinder 19 holding the universal joint 20 moves up and down to facilitate the connection of the universal joint 14 when connecting the tip of the universal joint 14 and the intermediate roll 2. Therefore, the rotation decelerated by the connected cholera pinion stand 21, universal joint 14, etc. is transmitted to the intermediate roll 2.

That is, on the drive side, which is the side where the pinion stand 15 etc. for driving the lower work roll 4 are installed, a luva drive mechanism consisting of a small motor 11, an electromagnetic clutch 17, a universal joint 14, etc. is provided. Become.

From the above, from the setting of the inter-roll gap to the biting of the rolled material, or during rolling, the small motor 11 rotates the upper work roll 1 via the intermediate roll 2,
By matching the rotational speed with the lower work roll 4 or maintaining an appropriate speed difference with the lower work roll 4, stable biting and threading of the rolled material 10 is possible.

Next, a second embodiment of the rolling mill of the present invention is shown in FIGS. 3 and 4.
The present embodiment will be explained based on the drawings.

Incidentally, the same members as those described in the prior art and the first embodiment are given the same reference numerals, and redundant explanation will be omitted.

A helper drive mechanism similar to that of the first embodiment is installed on the work side, which is opposite to the drive side where the motor for driving the lower work roll 4, the pinion stand 15, etc. are installed, with the rolls in between. is shown in Figure 3.

After loading the multistage cluster roll 110 into the rolling mill main body,
A pedestal 32 and a small motor 11 integrated with the pedestal 32 are attached using a crane, a roll changing device, etc. (not shown). Further, the pedestal 32 includes a gear mechanism 33.
One end of this gear mechanism 33 is connected to the small motor 11 via an electromagnetic clutch 37, and the other end is connected to the intermediate roll 2 via a universal joint 14. The universal joint 14 is supported by a coupling support 40 via an arm 32a extending from the pedestal 32.

Therefore, similarly to the first embodiment, the small motor 11 rotates the upper work roll 1 via the intermediate roll 2 during the period from setting the inter-roll gap to biting the rolled material or during rolling. As a result, stable biting and threading of the rolled material 10 is made possible by matching the rotational speed with the lower work roll 4 or maintaining an appropriate speed difference with the lower work roll 4.

In the first and second embodiments, the universal joint 14 is connected to the intermediate roll 2, but it may be connected directly to the upper work roll 1, for example.

<Effects of the Invention> According to the rolling mill of the present invention, not only one roll group that is driven and rotated, but also the other roll group can be auxiliary driven and rotated by the motor, and as a result, the rolling mill The rotational speeds of the upper and lower work rolls, which are located above and below the work rolls, can be made to match, which prevents warpage and bumping of the rolled material that occurs when there is a large difference in the rotational speed of the work rolls, resulting in stable rolling. Enables material to be inserted into the board.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of a first embodiment of the rolling mill of the present invention, FIG. 2 is a plan view of the main parts, and FIG. 3 is a front view of the main parts of the second embodiment of the rolling mill of the present invention. FIG. 4 is a side view of a main part showing an example of a multi-high rolling mill according to the present invention and a conventional technique. In the drawing, 1 is an upper work roll, 2 is an intermediate roll, 3a, 3b,
5 is a reinforcing roll, 4 is a lower work roll, 11 is a small motor, 13a, 13b. 33 is a gear mechanism, 14 is a universal joint, 17
．． 37 is an electromagnetic clutch. Figure 3 Ganjingyo Co., Ltd. Tetsu Co., Ltd. Hitoshi Hidetoshi (and 1 other person) Mitsubishi Heavy Industries Shin Nippon Seisaku Agent for patents

Claims (1)

[Claims] A roll group including at least a work roll that contacts and rolls the rolled material, and a reinforcing roll that presses and supports the outer circumferential surface of the work roll is located so as to correspond to the upper and lower surfaces of the rolled material, and one In a rolling mill in which the roll group is driven and rotated, a motor that auxiliarily drives and rotates the other roll group while controlling its speed; a universal joint that transmits the drive rotation of the motor to the other roll group; A rolling mill characterized by comprising a clutch located between a motor and the universal joint for transmitting drive rotation of the motor to the universal joint in an intermittent manner.