JPH0538616A - How to guide trim scraps - Google Patents

Abstract

PURPOSE:To properly guide trim scraps to a pass-line without being wound around the shaft of a guide roll by cutting off the width-directional end of a band steel as a trim scrap, and by guiding the trim scrap by the guide roll on the surface of which spiral guide grooves are formed so that it cannot be deviated from the pass-line of a chopper cutter part. CONSTITUTION:Spiral grooves 12 are formed on the roll surface of a guide roll 11. Thereby, even if a trim scrap 3 is fed to the guide roll 11 so as to be deviated from a pass-line, the trim scrap 3 moves toward the width-center of the roll 11, so that it can be correctly guided to the pass-line of a chopper cutter part. Further, since the guide grooves 12 are formed in this way, the friction coefficient of the roll 11 surface is increased, and the trim scrap 3 can be securely held on the surface of the roll 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim scrap guiding method for correctly guiding trim scrap generated in a side trimmer of a thin steel sheet line to a chopper-cutter.

[0002]

2. Description of the Related Art In a side trimmer of a thin plate line, both widthwise ends of a steel strip are cut and aligned to adjust the width dimension and the end shape of the steel strip. The trim scraps separated from the steel strip by the side trimmer are guided to the chopper-cutter part while being pinched by the chopper-pinch roll. At the chopper-cutter part, strip-shaped trim scraps are cut into chips of a predetermined length, and the chips are dropped into a scrap collection box.

[0003]

However, in the conventional guiding method, when the trim scrap is guided to the chopper-cutter by the pinch roll, the roll surface of the pinch roll is mirror-finished. The strip-shaped trim scraps slip on the roll surface, slip off the center of the pass line, and are not properly guided by the chopper-cutter. In particular, if the trim scraps of the steel strip coated with oil on the surface are to be guided only by the pinch force of the rolls, the trim scraps are largely displaced from the pass line in the width direction. Therefore, the trim chips cannot be cut into desired chips at the chopper-cutter portion. In addition, a pinch-ro for guidance
When the so-called trim dislodgement of the trim scraps from the roll becomes remarkable, the trim scraps may wind around the roll shaft and stop the operation.

The present invention has been made in view of the above circumstances, and the trim scraps can be continuously and correctly guided to the chopper-cutter without being wound around the guide roll shaft or the like. It is an object of the present invention to provide a method for inducing.

[0005]

A method for guiding trim scraps according to the present invention is a guide roll in which a widthwise end portion of a steel strip is separated as trim scraps and a spiral guide groove is formed on a roll surface.
The trim waste is guided so as not to deviate from the pass line of the chopper-cutter section.

[0006]

In the method for guiding trim scraps according to the present invention, since the spiral groove is formed on the roll surface of the guide roll, the trim scraps are removed from the pass line and sent to the guide roll. Even when fed, trim debris moves along the groove toward the center of the width of the roll and is correctly guided to the pass line of the chopper-cutter section. Further, since the guide groove is formed, the friction coefficient of the roll surface is increased, and the trim dust can be reliably caught on the roll surface.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 2, a side trimmer (not shown) is provided on the downstream side of the thin steel sheet production line so that the widthwise end of the steel strip 2 is cut off into a predetermined width. .. Although the drawing shows the state in which only one end of the steel strip 2 is separated, the other end of the steel strip 2 is also separated by a side trimmer.

Guide rolls 10 and 11 are provided on the further downstream side of the side trimmer so that strip-shaped trim scraps are guided toward a chopper-cutter (not shown).

The upper roll 10 of the induction rolls is a free roll.
It is a roll and applies a desired pinch force to the trim scrap 3. On the other hand, the shaft 13 of the lower roll 11 is
Drive shaft (not shown) of the motor.

The chopper-cutter (not shown) has a pair of shearing blades orthogonal to the pass line. The timing cutter moves the shearing blades up and down at regular intervals to remove trim scraps by a predetermined length. It can be sheared for each. A scrap collection box (not shown) below the chopper-cutter
Is provided so that the chips fall into the collection box.

As shown in FIG. 3, the drive side shaft 13 and the non-drive side shaft 14 of the lower roll 11 are supported by a fixed frame (not shown) via bearings 15. .. A spiral groove 12 is formed on the roll surface of the lower roll 11. The groove direction of the spiral groove 12 is divided into right and left at the center of the roll 11, and as shown in FIG.
The trim scraps 3 approach the center of the roll as the roll rotates. The inclination angle θ of the spiral groove 12 with respect to the roll axis is preferably set in the range of about 70 to 85 °. The length of the roll surface of the lower roll 11 is
It has a diameter of 300 mm and a roll diameter of 200 mm, and is induction hardened at a depth of at least 3 mm from the surface.

As shown in FIG. 4, the spiral groove 12 is formed.
Has a U-shaped cross section, and the grooves 12 are formed at equal intervals. In this case, the cross-sectional shape of the groove 12 is V-shaped,
It may have various shapes such as a rectangular shape and a semicircular shape. The spiral groove 12 has a groove depth of 0.5 to 2.0 mm,
It is preferable to select the groove width in the range of 0.5 to 2.0 mm and the pitch interval between the grooves in the range of 5 to 10 mm. Next, the operation will be described.

A side trimmer cuts off the widthwise end of the steel strip 2 to a predetermined width and sends it to the guide rolls 10 and 11. The strip-shaped trim scrap 3 thus separated is guided between the rolls of the rolls 10 and 11 by a guide member (not shown) around the strip. If the trim scrap 3 is deformed or displaced, the
The trim scraps 3 are sandwiched near the end portions in the width direction of the tools 10 and 11.

As shown in FIG. 1, as the roll 11 rotates, the trim scrap 3 moves toward the center of the roll 11 by the spiral groove 12. As a result, the trim scrap 3 is
Without being wound around the shaft 13 of the guide roll 11, the guide roll 11 is correctly guided toward the chopper-cutter. As a result, there is no longer an accident that would result in a shutdown.

In the above embodiment, the spiral groove is formed on the roll surface of the guide roll. However, the present invention is not limited to this, and the roll surface is roll-rolled. It may be processed.

[0017]

According to the present invention, the trim dust is guided and filtered.
It can be correctly guided to the path line of the chopper-cutter without wrapping around the shaft of the reel. As a result, there will be no accidents that would stop the operation as in the past.

[Brief description of drawings]

FIG. 1 is a view showing a guide roll and a trim scrap used in a method for guiding trim scrap according to an embodiment of the present invention as viewed from the direction of a pass line.

FIG. 2 is a schematic perspective view schematically showing a part of a thin plate line.

FIG. 3 is a front view showing a guide roll.

FIG. 4 is an enlarged sectional view showing a groove forming portion of the guide roll.

[Explanation of symbols]

2; Steel strip, 3; Trim scrap, 10, 11; Induction roll, 1
2; groove, 13; roll shaft

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuhiro Watanabe 1-2, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Yoshio Fukunaga 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Inventor Yoshihiro Fujii 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (1)

[Claims] 1. A guide roll in which a widthwise end portion of a steel strip is separated as trim scraps and a spiral guide groove is formed on a roll surface.
A guide method for trim chips, wherein the trim chips are guided so as not to deviate from the pass line of the chopper-cutter section.