KR20170075093A - Apparatus for cutting scrap - Google Patents

Abstract

The present invention relates to a scrap cutting apparatus, comprising: a base; A pair of chopper units mounted on the base; And a turret portion provided to rotate the base while supporting the base, so that it is possible to easily switch to the preliminary chopper portion which is prepared in advance in the event of an unexpected situation, so that productivity and quality defects can be prevented do.

Description

[0001] Apparatus for cutting scrap [0002]

The present invention relates to a scrap cutting apparatus capable of preventing productivity deterioration and quality defects.

Generally, in the production of a hot-rolled steel sheet or a cold-rolled steel sheet, side trimming is performed in which both ends of the steel sheet are sheared by a correcting line in order to match the width dimension of the product.

1 is a view schematically showing a scrap cutting apparatus applied to side trimming. A scrap cutting device 4 for cutting a scrap into a plurality of pieces 5 is used in order to process a narrow strip shaped scrap 3 generated when the end of the steel strip 1 is sheared in the side trimmer 2 .

The most important of these scrap cutting devices is the gap and wear of the knife. However, as the demand for high tensile strength steel is increased, the high-tensile steel sheet is mainly manufactured, and the knife is frequently replaced due to the deformation of the equipment and the decrease in precision due to the wear of the knife.

Since the knife can not be replaced during operation of the line, problems such as breakage of the knife may cause side trimming or slow down the line speed. Failure to do the side trimming will not satisfy the requirements of the customer, which will eventually require reprocessing, and the productivity will decline when the line is decelerated.

In addition, if cutting failure occurs due to an abnormality of the scrap cutting apparatus, the side trimming becomes poor and affects the quality. If the scrap can not be cut, it may be scattered or cause scratches on the steel strip. Moreover, scrap that has not been cut off must be cut manually by the operator, leading to serious problems of exposure to safety accidents.

(Patent Document 1) KR 2003-0045283 A

Accordingly, it is a main object of the present invention to provide a scrap cutting device capable of preventing productivity deterioration and quality defects.

A scrap cutting apparatus according to an embodiment of the present invention includes: a base; A pair of chopper units mounted on the base; And a turret portion provided to rotate the base while supporting the base.

As described above, according to the present invention, the turret portion can be easily switched to the preliminary chopper portion prepared beforehand in the event of an unexpected situation, so that productivity and quality defects can be prevented due to breakage or the like.

Further, according to the present invention, since scrap is not accumulated due to the occurrence of cutting failure, manual cutting operation by the operator is unnecessary, and thus, safety accident can be prevented in advance.

1 is a view schematically showing a scrap cutting apparatus applied to side trimming.
2 is a front view schematically showing a scrap cutting apparatus according to an embodiment of the present invention.
3 is a plan view schematically showing a scrap cutting apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 2 is a front view schematically showing a scrap cutting apparatus according to an embodiment of the present invention, and FIG. 3 is a plan view.

As shown in these figures. A scrap cutting apparatus according to an embodiment of the present invention includes a base 10; A pair of chopper units 20A and 20B installed on the base; And a turret portion 30 installed to rotate the base while supporting the base.

Two bases 10 are installed one by one on both sides of the path of the steel strip 1 or the scrap 3. In addition, a pair of chopper units 20A and 20B can be installed on one base, respectively.

These chopper portions 20A and 20B placed on one base 10 can be arranged side by side along the path of the steel strip 1 or the scrap 3. Moreover, these chopper parts have a bearing point-symmetric with respect to each other with respect to the center of the corresponding base.

Since the configurations of the pair of chopper units 20A and 20B placed on one base 10 are the same as each other, one chopper unit will be described below.

The first chopper section 20A includes a housing 21, a pair of rotors 22 mounted on the housing and having a knife 23 mounted on the outer periphery thereof, and a transmission device (not shown) such as a decelerator for rotating these rotors ). A pair of rotors are installed up and down with a predetermined interval so that the knives are engaged while rotating according to the driving of the transmission.

The knife 23 is mounted parallel to the axial direction of the rotor at regular intervals in the circumferential direction of the respective rotors 22. The knife of one rotor and the knife of the other rotor engage with each other, and the scrap 3 passing between the knives is cut to a predetermined length.

A scraper cutting apparatus according to an embodiment of the present invention includes a first clutch 25 provided on a first rotating shaft 24 extending from a transmission device for rotating a knife 23 of a rotor 22, A second gear 15 provided on the motor shaft of the drive motor 19 and connected to the first clutch 15 and connected to the first clutch 14, a second gear 16 provided on the opposite side of the second clutch from the second rotation shaft, And a first gear 17 engaged with the second gear. Here, the drive motor 19 may be located on a separate support member spaced apart from the base 10.

Thus, when the first clutch 25 and the second clutch 15 are connected and the drive motor 19 is rotated, the driving force of the drive motor is transmitted to the first gear 17, the second gear 16, The scrap 3 is cut into pieces 5 (see Fig. 1) while the knife 23 is rotated, as shown in Fig. 1, and the rotor 22 is rotated via the first clutch 25 and the transmission. The drive motor may be directly connected to the second rotary shaft 14 of the second clutch without the first gear and the second gear.

The turret portion 30 is connected to the pivot shaft 11 provided on the base 10. The turret portion is rotatably mounted relative to the pivot shaft via a bearing which is not shown.

The turret unit 30 includes a turret body 31 for slidably supporting the base 10, a swing motor 32 disposed on one side of the turret body, a drive gear 33 provided on the output shaft of the swing motor, And a driven gear (34) provided on the pivot shaft of the base in engagement with the drive gear.

2, the driving gear 33 and the driven gear 34 are illustrated as a bevel gear. However, the present invention is not limited thereto. For example, any other driving force transmitting mechanism such as a worm and a worm gear may be employed.

 As a result, the base 10 can be rotated on the turret 30 by the drive of the swing motor 32.

When the cutting load is increased due to wear or breakage of a specific portion of the knife 23 in the rotor 22 of the first chopper unit 20A, the base 10 is rotated by the operation of the swing motor 32, 11, that is, the second chopper unit 20B, which has been reserved.

The entire first scrap cutting device is rotated in the direction of the arrow 34 shown in Fig. 3 and then the first clutch 25 of the second chopper portion 20B having the uncut knife 23 is rotated by the drive motor 19), it is possible to continuously cut the scrap 3 without deteriorating the productivity.

On the other hand, the knife 23 of the worn first chopper portion 20A can be polished or replaced with a new knife while the knife of the second chopper portion 20B cuts the scrap 3. Thereby, the first chopper portion can be prepared as the spare chopper portion.

By repeating the above-described method, the entire scrap cutting device can be used, and a stable strap processing operation can be performed. Therefore, even if the knife is broken, the side trimming can not be performed, the speed of the line need not be reduced, the cutting defect does not occur, the quality is not adversely affected, the worker does not have to manually cut An accident can be prevented.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: steel plate 3: scrap
10: Base 20A: First chopper part
20B: second chopper section 21: housing
22: rotor 23: knife
30: Turret portion

Claims (6)

Base;
A pair of chopper units mounted on the base; And
And a turret portion provided to rotate the base while supporting the base,
.
The method according to claim 1,
Wherein the pair of chopper units are oriented symmetrically with respect to each other with respect to the center of the base.
3. The method of claim 2,
The chopper unit
housing,
A pair of rotors provided on the housing and having knives mounted on the outer circumferential surface thereof,
A transmission device for rotating the rotor
And a scraping device for scraping the scraper.
The method of claim 3,
A first clutch disposed on a first rotation shaft extending from the transmission,
A second clutch installed on the second rotation shaft and connected to the first clutch, and
And a driving motor connected to the second rotation shaft.
The method according to claim 1,
Wherein the turret comprises:
A turret body for slidably supporting the base,
A swing motor disposed on one side of the turret body,
A drive gear provided on an output shaft of the swing motor,
And a driven gear provided on the pivot shaft of the base,
And a scraping device for scraping the scraper.
6. The method of claim 5,
Wherein the scrap cutting device is disposed one by one in both sides of the path of the scrap.

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