JP3371832B2 - Trimming work method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trimming method for side trimming a metal strip when changing trim conditions such as transition from note rim work to trim work.

[0002]

2. Description of the Related Art With the diversification of demand, there is an increasing demand for continuously and efficiently processing products of various sizes and materials with the same equipment. This requirement also applies to side trimmer devices such as steel strip trimming lines that continuously side trim metal strips.

In the steel strip refining line, side trimming is performed in order to keep the strip width within a predetermined allowable width range. For the trimmer blade clearance and trimmer blade overlap, which are trimmer conditions, steel strip size,
An empirically determined reference value is preset for each material.

In order to perform the trimming work efficiently, the side trimmer device is used as a side trimmer device while running the metal strip.
A so-called automatic running width change trimmer that can change the trimmer conditions is adopted. In this device, the trimmer condition can be quickly changed to a condition corresponding to the trailing steel strip size and material during traveling of the steel strip in accordance with the time when the welded portion passes the trimmer blade position.

Some customers desire a product that is side-trimmed on the pickling line after hot rolling and not on the steel strip refining line. Therefore, in the finishing line, not only the trimming condition is changed according to various running steel strip dimensions and the like, but also the note rim work and the trim work are frequently switched.

[0006] However, in the automatic running width changing trimmer, there is little change in the thickness of the coil tip and tail at the time of transition from the note rim material to the trim material, plate width variation and trim margin at the running width changing start portion. However, due to the difficulty of cutting due to insufficient plate restraining force, etc., the trimming waste is not completely separated from the steel strip and the trimming often fails. If the trimming fails, the line is stopped and the tip is processed manually. Therefore, there is a problem in that the efficiency is reduced and the yield is reduced when the line is stopped.

[0007]

DISCLOSURE OF THE INVENTION The present invention, when changing the trim conditions such as the transition from the note rim material to the trim material,
An object of the present invention is to provide a trimming work method which does not have a problem of a decrease in efficiency and a decrease in yield due to line stop.

[0008]

[Means for Solving the Problems] Means for solving the problems described above are provided by a plurality of automatic running width changing trimmers.
In the method of side trimming a metal strip that is welded to a book strip ,
Side trimin on trip and welds of trailing strips
The trimmer blade clearance is smaller than the clearance when trimming a normal portion other than the welded portion, and / or the trimmer blade overlap is trimmed in a normal portion other than the welded portion. This is a trimming work method characterized in that the trimming work is performed larger than the overlap at the time of trimming.

By making the overlap at the start of the trimming work larger than the overlap of the normal part and / or making the clearance smaller than the clearance of the normal part, it becomes easy to separate the trimming chips at the tip part and the line caused by the failure of the trimming. There is no outage.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be further described below.

FIG. 1 is a view showing a main part of a running width changing trimmer for explaining an embodiment of the present invention, showing an example of a normal / non-returning combined trimmer. In FIG. 1, the side trimmer 1 is provided with a pair of upper and lower trimmer blades 11 that overlap each other in the thickness direction of the strip 10 and are arranged with a predetermined clearance in the width direction of the strip 10 on both sides of the strip 10. Separator rolls, 3 are masher rolls, and 4 and 5 are waste chutes. In the case of ordinary trim, the trimming scraps separated by the pair of upper and lower trimmer blades 11 are discharged from the scrap chute 4, and in the case of non-return trim, the trimming scraps cut by the pair of upper and lower trimmer blades 11 are separated by the separator roll 2. , Waste chute 5
Emitted from.

2A and 2B are views showing a clearance and an overlapping state of the trimmer blade 11, wherein FIG. 2A shows an example of normal trim and FIG. 2B shows an example of non-returning trim. The non-return trim has smaller clearance and overlap than the normal trim.

In the apparatus shown in FIG. 1, the side trimmer 1 includes an overlap adjusting actuator 12 for adjusting the overlap of the trimmer blade 11, a clearance adjusting actuator 13 for adjusting the clearance of the trimmer blade 11, and a trimmer. A trimmer traverse actuator 14 and a trimmer swivel actuator 15 for adjusting the width, a weld zone detector 21 for detecting the weld zone of the strip 10, a weld zone detection signal of the strip 10 detected by the weld zone detector 21, and a postscript. A trimmer control computer 23 that tracks the welded portion based on the traveling speed of the strip 10 from the bridle roll tachometer 26 and controls the actuators 12 to 15 based on the information from the host computer 22 and the tracking information. , Or Constructed.

In FIG. 1, reference numeral 24 is a bridle roll for conveying the strip 10, 25 is an electric motor for driving the bridle roll 24, and 26 is a bridle roll tachometer installed in the electric motor 25.

The upper computer 22 has a normal trim,
Non-returnable trim, depending on strip size and material,
The preset values of the clearance and overlap of the trimmer blade 11 in the normal part and the initial settings of the clearance and overlap of the trimmer blade 11 when the trim condition is changed such as the transition from the note rim material to the trim material are preset. The initial setting value of the clearance of the trimmer blade 11 is smaller than the setting value of the clearance of the normal part when the trim condition is changed such as the transition from the note rim material to the trim material, and the initial setting value of the overlap is Greater than the set value.

Since trimming is started in a state where the clearance of the trimmer blade 11 is smaller than the normal portion and / or the overlap is larger than the normal portion, trimming waste can be reliably separated from the strip, and trimming failure at the start of trimming can be prevented. it can.

After the trimming is started, the initial setting values of the clearance and overlap of the trimmer blade 11 are changed to the setting values of the normal portion before the trimming of the product portion is started.

When the trimming condition is changed while performing the trimming operation with both the leading material and the trailing material, the trimmer condition setting is changed when the welded portion passes the position of the trimmer blade 11.

At the front end of the steel strip, a part of the trimming work is out of proper trimming conditions. However, this part is conventionally used because of the inclusion of inevitable defects peculiar to the end and sampling of material test. Since it hits a portion that has been more scrapped, the product yield is not reduced.

Further, it is not preferable to reduce the clearance and increase the overlap from the viewpoint of the life of the trimmer blade, but since the condition of the normal part is quickly returned after the trimming is started, the life of the trimmer blade is substantially reduced. Does not affect

[0021]

According to the present invention, it is possible to prevent the occurrence of defective trimming at the time of changing the trim work such as the transition from the note rim material to the trim material. Therefore, it is possible to solve the problems of the efficiency reduction and the yield reduction due to the line stop and the notcher insertion due to the trimming failure.

[Brief description of drawings]

FIG. 1 is a view showing a main part of a running width changing trimmer for explaining an embodiment of the invention.

2A and 2B are diagrams showing a clearance and an overlapping state of a trimmer blade, FIG. 2A shows an example of normal trim, and FIG. 2B shows an example of non-returning trim.

[Explanation of symbols]

1 side trimmer 2 Separator roll 3 masher roll 4, 5 trimming waste chute 10 strips 11 trimmer blades 12 to 15 actuators 21 Weld zone detector 22 Host computer 23 Computer for trimmer control 24 bridle rolls 25 electric motor 26 bridle roll tachometer

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seishiro Hagiwara 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Hiroshi Sawada 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (56) Reference JP 62-224516 (JP, A) JP 62-213916 (JP, A) JP 6-126523 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) B23D 19/06

Claims (3)

(57) [Claims] 1. A plurality of skis using an automatic running width changing trimmer .
In the method of side trimming a metal strip welded to a trip, a welded precursor strip is used.
Side trimming of the welded part of the
The normal portion of the clearance of trimmer blade than the weld
It is smaller than the clearance when trimming and / or the overlap of the trimmer blade is a normal part other than the welded part.
The trimming work method is characterized in that the trimming is performed larger than the overlap when trimming. 2. Side trimming when changing trim conditions.
Side trimming from the preceding material strip
Characterized in that it is when moving to the trailing material strip
The trimming work method according to claim 1. 3. When the trim condition is changed, the side trim is changed.
From the leading material strip to the trailing material strip
The bird according to claim 1, wherein the bird is moving.
Ming work method.