JPH11151609A - Flexible tandem slitting method and device for band steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To slit a band steel at any width in a multiple manner by setting the fitting position of a rotating blade on a drive spindle so that the relative position of the rotating blade on the drive spindle can satisfy a given requirement, and moreover so that the relative position of the rotating blade to the band steel toward the downstream side from the upstream side can satisfy a given requirement. SOLUTION: Slitters A, B, C, and D equipped with slit roll sets are arranged so that intervals can be reduced so that the slitter intervals of the respective roll sets can be A>B>C>D, toward a downstream side from an upper stream side, in order to improve slitting workability, and moreover the respective slitters are made so as to be rotatingly driven and slitted symmetrically with a band steel traveling speed, thereby making an initial band steel S gradually reduce its width to be slitted. The intervals of the slitters, equipped with four slit roll sets, can be controlled automatically for obtaining a desired size width.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible tandem slitting mechanism capable of slitting a steel strip (hoop) used for forming a pipe into a strip having an arbitrary width.

[0002]

2. Description of the Related Art Strip steel (hoop) used for forming pipes
In general, a slitter trades a cold rolled steel sheet as a material in advance into a hoop having a required width according to the needs of a customer, and purchases the hoop and supplies it to a pipe forming line. This slitting work is a pre-processing work before pipe forming, but recently the shift from diversification of products to high-mix low-volume production has become an extremely important technical issue, with unmanned and automated slitting work. It is getting.

[0003]

At present, the biggest problem of the slitting technique or the slitter which is most commonly performed is the change of the blade position due to the change of the slit width. Since the change of position depends on human power, workability is extremely poor, and it is difficult to secure stable hoop width accuracy, so that the best solution has not yet been found.

[0004]

First, the present inventors have studied various measures for solving the above problems in order to realize a flexible tandem slitting apparatus for steel strips which is an object of the present invention. It has been found that the object of the present invention can be achieved if the following can be achieved. That is, 1) that it is a multi-axis tandem type slitter, 2) that two to four rotating blades are incorporated in the drive shaft of each slitter, and 3) each rotation is on the drive shaft of each slitter. A sliding mechanism for moving the blade in the axial direction along the drive shaft is attached. 4) The sliding mechanism is capable of moving the drive shaft by a required distance together with each rotating blade by a numerical signal at a predetermined position. 5) has a function of fixing each rotating blade to the drive shaft; 5) a function of the sliding mechanism to release each rotating blade from the fixed state to the drive shaft and to return to a state movable along the drive shaft. 6) The amount of biting of the blades of each pair of rotating blades can be numerically arbitrarily adjusted by a rolling device incorporated in each stand. 7) Guides are installed between the stands and between the entrance and exit sides of the slitter to guide the steel band (hoop) while restraining it from the vertical direction at a required interval. 8) The vertical guides It is necessary that requirements such as that the position can be arbitrarily changed by a numerical signal are satisfied.

The present invention solves the above problems, satisfies the above requirements 1) to 8), and can arbitrarily change the slit width and the slit position of the steel strip. An object of the present invention is to provide a flexible tandem slitting method and device capable of achieving unmanned operation, the gist of which is as follows. (1) In a flexible tandem slitting method for slitting a strip into multiple strips with an arbitrary width, a pair of a plurality of rotating blades, two upper and lower drive shafts on which the rotating blades are mounted, a choke for supporting the drive shaft, and The drive shaft is provided with two or more pairs of rotating blades at arbitrary intervals in a direction perpendicular to the running direction of the steel strip, and is composed of a stand having a frame as a basic element. Can be changed freely and self-propelled on the drive shaft in accordance with an external instruction by the built-in electromechanical mechanism, and the steel strip is sheared by cutting the cutting edge of a pair of rotating blades. A plurality of stands having a slitting mechanism that can be separated are arranged in tandem in the running direction of the steel strip, and are arranged on the steel strip from the upstream side to the downstream side. By setting the mounting position of the rotary blade on the drive shaft so that the relative position of the rotary blade satisfies a predetermined requirement, the steel strip can be slit into multiple strips of any width. Flexible tandem slitting method for steel.

(2) Strips which are arranged in tandem in the strip feeding direction, and which have a small space above and below the strip running between the slitting mechanisms arranged in the tandem and support the strip vertically. A guide, a plurality of pairs of rotating blades, a stand having, as basic elements, two drive shafts for mounting the rotating blades, a choke and a frame supporting the drive shafts, and a direction orthogonal to the running direction of the steel strip. The drive shaft is equipped with two or more pairs of rotating blades at arbitrary intervals, and according to an external instruction on the drive shaft by an electromechanical mechanism incorporating a relative position between the strip and each pair of rotating blades. A traveling direction of a strip having a slitting mechanism which can be freely and self-propelled and has a slitting mechanism capable of shearing and separating the strip by cutting a cutting edge of a pair of rotating blades. A plurality of stands arranged in tandem, and the slitting mechanism adjusts the mounting position of the rotary blade on the drive shaft so that the relative position of the rotary blade with respect to the strip from the upstream side to the downstream side satisfies a predetermined requirement. A flexible tandem slitting device for a steel strip, characterized in that the steel strip can be slit into multiple strips with an arbitrary width by providing a setting mechanism.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a bird's-eye view of the flexible tandem slitting device according to the present invention as viewed from the upstream side,
A rotating roll set having a pair of left and right upper and lower rotating blades constituting a slitting mechanism that forms a slitting mechanism centering on the center of the traveling steel strip in the traveling direction of the steel strip (hoop) S, and rotating in opposite directions to each other. Each of the lands having a slitting mechanism in which the outer peripheries of the rotating rolls are arranged in a staggered manner so as to slightly overlap each other, and each of which has a slitting mechanism for applying a shearing force to the steel strip slit at the overlapping portion between the rotating rolls and slitting the strips. 1
Stage, No. No. 2 stage, No. No. 3 stage and No. It is configured to perform three-stage and four-stage slits, and a slit roll set is arranged in tandem with A, B, C, and D in each slitting stage. Here, a description will be given of the case of a slitter having four slit roll sets and a four-stage slitting stage. However, it is needless to say that the slitter can be arbitrarily increased or decreased according to a desired slit width. In the slitters A, B, C, and D provided with these slit roll sets, the slitter interval of each roll set is A>B>C> D from the upstream side to the downstream side in order to improve the workability of the slit. Thus, the slits are arranged so as to gradually reduce the intervals, and each of them is driven to rotate in synchronization with the running speed of the steel strip and slit. As a result, the width of the initial steel strip S is gradually reduced and the steel strip S is slit.

That is, in the steel strip S having the initial width, both ends S1 of the steel strip S are slit by the slitter A, both ends S2 of the steel strip S1 are slit by the slitter B, and the steel strip S2 is further slit by the slitter C. Both ends S3 are slit, and finally both ends S4 of the steel strip S3 are slit by the slitter D to leave the steel strip of S5, and tension is applied to the entire steel strip by a winding machine (not shown).

It is easy for a computer to automatically control the interval between the slitters provided with the four sets of slit rolls described above in order to obtain a desired size width. Immediately thereafter, it is wound by a winder (not shown). Further, when the final steel strip S5 is sent to a forming line for forming in actual work, the slitting apparatus according to the present invention can be directly connected to the forming line.

A rotating roll set having a pair of upper and lower rotating blades H on the left and right and constituting a slitting mechanism centering on the center of the running steel strip in the running direction of the steel strip (hoop) S. (Only one side is described for the sake of convenience because it is a left-right symmetric). From the upstream side, the rotating roll set A rotationally drives the rotating rolls 1 and 2, the choke frames C1 and C2 supporting these rotating rolls, and the rotating rolls. The rotating roll set B includes rotating motors M1 and M2, and the rotating roll set B includes rotating rolls 3 and 4, choke frames C3 and C4 that support these rotating rolls, and driving motors M3 and M4 that rotationally drive the rotating rolls.
The rotating roll set C includes rotating rolls 5 and 6, choke frames C5 and C6 for supporting the rotating rolls, and driving motors M5 and M6 for rotating the rotating rolls. , 8 and chock frames C7, C8 supporting these rotating rolls
And a drive motor M for rotatingly driving the rotary roll
7 and M8, and are arranged in a staggered manner so that the outer peripheries of the upper and lower rotating rolls slightly overlap, and a shear force is applied to the strip that is slit at the overlapping portion between the rotating rolls to perform slitting. It is configured as follows.

FIG. 2 is a side view of a flexible tandem slitting apparatus according to the present invention. In FIG. 2, the rotating roll set A stand to the rotating roll set D stand are arranged in tandem from the upstream side.
The guides 9 for supporting the belt from above and below are provided between the rotating roll set A and the rotating roll set B, between the rotating roll set B and the rotating roll set C, and between the rotating roll set C and the rotating roll set D, respectively. Guides 10, 1 for supporting the
1 and 12 are provided. This prevents meandering and flapping of the steel strip during the slitting operation. Similarly, on the delivery side, a delivery guide 13 that supports the slit steel strip S5 from above and below is arranged to facilitate winding and feeding in the next step.

By adopting such a configuration, the rotating roll having the rotating blade is axially moved, fixed, and opened by inserting a spacer in accordance with a predetermined gap between the rotating blades, and forming the rotating blade with the rotating blade. The spacers can be freely moved, fixed and released in the axial direction of the rotary drive shaft of the drive motor alternately for adjusting the gap between the rotary blades. It is also possible to set the rotary blade once at a predetermined position and then inflate a sleeve incorporated in the rotary drive shaft to apply pressure from the inner diameter side of the rotary blade to move, fix and release. Also,
In the present invention, as shown in FIG. 1 and FIG. 2, an example in which the number of rotating blades incorporated in each rotating roll is two has been described. Needless to say, the structure and the control system are simplified, and improvement in reliability and simplification of maintenance can be realized. Further, when implementing the present invention, it is possible to select a combination most suitable for actual requirements in consideration of the gain when increasing the number of tandem-type stand stands and when increasing the number of rotating blades per axis.

[0013]

As described above, in the flexible tandem slitting apparatus according to the present invention, the slit width of the steel strip and the position of the rotation roll interval based on the slit width can be arbitrarily set according to the steel strip width required in the pipe forming process. It is possible to realize labor saving and unmanned slitting work, and to achieve a large improvement in the operation rate even for small lot production.

[Brief description of the drawings]

FIG. 1 is a schematic bird's-eye view of the entire flexible tandem slitting apparatus of the present invention.

FIG. 2 is a schematic side view of the flexible tandem slitting apparatus of the present invention.

[Explanation of symbols]

S: Strip steel S1, S2, S3, S4, S5: Slit strip steel A, B, C, D: Slitter 1, 2, 3, 4, 5, 6, 7, 8 ... Rotary roll set of slitter C1 , C2, C3, C4, C5, C6, C7, C8 ... Chock frames M1, M2, M3, M4, M5, M6, M7, M8 ... Driving motor H ... Rotating blade 9 ... Entry guides 10, 11, 12 ... Intermediate guide 13: Exit guide

Claims (2)

[Claims] In a flexible tandem slitting method for slitting a steel strip into multiple strips of an arbitrary width, a plurality of pairs of rotary blades, two upper and lower drive shafts on which the rotary blades are mounted, and the drive shaft are supported. It is composed of a stand having a chock and a frame as basic elements, equipped with two or more pairs of rotating blades on the drive shaft at arbitrary intervals in a direction orthogonal to the running direction of the strip, and An electromechanical mechanism incorporating the relative position with the pair can be freely and self-propelledly changed on the drive shaft in accordance with an external instruction, and the steel strip is cut by cutting the cutting edge of the pair of rotating blades. A plurality of stands having a slitting mechanism capable of shearing the steel strip are arranged in tandem in the running direction of the steel strip, and the steel strip is arranged from the upstream side to the downstream side. By setting the mounting position of the rotary blade on the drive shaft so that the relative position of the rotary blade with respect to a predetermined requirement satisfies a predetermined requirement, the strip can be slit into multiple strips with an arbitrary width. Flexible tandem slitting of steel strip. 2. A strip guide which is arranged in tandem in the strip feeding direction and has a small interval above and below the strip running between the stripping mechanism and the slitting mechanism arranged in tandem, and supports the strip in the up and down direction. A stand having a pair of a plurality of rotating blades, two upper and lower drive shafts on which the rotating blades are mounted, a chock and a frame supporting the drive shafts as basic elements, and a direction perpendicular to the running direction of the strip. The drive shaft is provided with two or more pairs of rotating blades at an interval of, and is freely driven on the drive shaft according to an external instruction on the drive shaft by an electromechanical mechanism incorporating a relative position between the strip and each pair of rotating blades. It can be changed in a self-propelled manner, and has a slitting mechanism capable of shearing and separating the steel strip by cutting the cutting edge of a pair of rotating blades. Multiple stands arranged in dem,
By providing a mechanism for setting the mounting position of the rotary blade on the drive shaft so that the relative position of the rotary blade with respect to the strip from the upstream side toward the downstream side satisfies a predetermined requirement, A flexible tandem slitting apparatus for a steel strip, wherein the steel strip can be slit into multiple strips of any width.