JPH0538614A - Side trimming of metal band and manufacture thereof - Google Patents

Abstract

PURPOSE:To carry out side-trimming of a metal band precisely in uniform plate width in a stable state without causing surface defect such as a scratch or plate breakage on the surface and even when plate thickness is less than 0.5mm and plate width is more than 1000mm. CONSTITUTION:At the time of side-trimming of a metal band, which is in the state given a specified tensile force that one face is bent along a second deflector roll 3 after the other face is bent along a first deflector roll 2, through outlet side deflector rolls 5, 6 or a pinch roll after side-trimming of the metal band 9 with round blades 1ba, 1bb of a side trimming device 1, side trimming is carried out by providing a supporting roll 4 making contact with at least a face making contact with the second deflector roll 3 of the metal band 9 and a face on the opposite side in the neighbourhood of a side trimmer 1 between the side trimmer 1 and the second deflector roll 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is more difficult as the plate thickness becomes thinner and the plate width becomes wider without causing surface defects such as scratches and scratches on the surface of the metal strip, and defects such as plate folds and wrinkles. Even in an increasing number of metal strips (hereinafter, also referred to as wide and thin metal strips), it is possible to perform side trimming method of a metal strip that can perform side trimming to a uniform and accurate plate width in a stable state, and to implement this method. It relates to a suitable device.

[0002]

2. Description of the Related Art To trim a metal strip to a target strip width or to remove defective portions at both end portions (both sides) of the strip, it is usually necessary to perform various strip processing of the strip. A pair of round blades are fixed at predetermined positions on both sides of the upper and lower shafts of the side trimming device installed in the processing line with an appropriate gap (horizontal blade edge interval) between the upper and lower round blades ( At this time, an appropriate vertical wrap is formed between the upper and lower round blades, and a metal band is passed between the upper and lower round blades fixed in this way to continuously cut off both ends of the metal band. Then, a metal strip having a target plate width was used.

The round blade in this side trimming device is used while continuously removing both end portions of the metal strip, and the blade edge becomes blunt in some cases, resulting in chipping of the blade, resulting in abnormal cutting or poor cutting. Since it will be used repeatedly after being properly treated by polishing, etc., there will be a diameter change from the maximum diameter of a new product to the minimum diameter at which it cannot be used according to the device specifications. I was rejecting it. Therefore, in the device that passes the metal strip and side trims,
It is necessary to set and adjust the wrap between a pair of upper and lower round blades in order to properly cut off both end portions of the metal strip depending on the thickness of the threaded metal strip, and the diameter change of such round blades. Even if a lap occurs, the side trimming level of the metal strip with the round blade (the vertical threading position and stripping level of the metal strip that is cut by passing through the device) does not change. Of the type designed to, the lower round blade is arranged at a fixed position in the device, and the upper round blade moves up and down according to the diameter change of the upper and lower round blades, and the side trimming level of the metal band changes. There is a type that is designed as such (often a relatively large number of this type, and vice versa). The former is of a type in which the side trimming level of the metal strip is always invariable, so that the upper and lower round blades are respectively raised and lowered according to the change in the diameter of the round blades, and an appropriate lap setting is configured.

Further, as a side trimming device, the tension generated in the line by the self-weight of the metal strip itself or the inside of the line with respect to the metal strip which is passed through the device and whose both end portions are cut off by the round blades. The minimum required tension (for example, about 5 N / mm ² ) is applied to the guide to pass through and wind it up, but it is configured to side-trim a metal band that seems to be tensionless for side-trimming. Depending on the situation, the material of the metal band to be cut, the quality reasons after cutting, and various circumstances before and after the device installed in the line, a predetermined tension (for example, 5 N / mm ^{2 to} 200 N or more
In some cases, it is configured to side-trim the metal strip in the state where / mm ² ) is applied.

However, when side trimming of a metal strip is performed using such a side trimming device, the metal strip between a pair of round blades arranged on both sides from the vicinity of the entrance side of the device is , If it becomes bent due to its own weight, and if a certain amount of tension is applied to the metal strip in the sheet passing direction, the strain that is caused by that tension is multiplied by the Poisson's ratio to generate the strain. Since it also acts in the width direction of the metal strip, especially when the metal strip to be side-trimmed is a wide and thin metal strip, the contact surface with the roll that the metal strips located between the round blades on both sides touched last Since the plate width accuracy of the metal strip is often further deteriorated due to excessive bending in a gutter shape with the side inside,
The device as shown in FIG.

That is, the side trimming device 1 in which the round blades 1ba and 1bb are sandwiched from both sides by a ring 1a whose surface is lined with an elastic body such as urethane rubber is arranged at a position where the metal strip 9 passes through. Then, each ring 1a clamps both side ends of the metal strip 9 at positions corresponding to predetermined trim positions on both side ends of the metal strip 9.
Both sides of the metal strip 9 are sandwiched by a holding plate 8 whose surface is made of a felt pad 8a made of a material such as a chemical fiber.
The metal strip 9 is restrained by bending sideways while preventing the bending of the metal strip 9 and passed through in a stable state to improve the plate width accuracy of the metal strip 9 after the side trimming.

However, when side trimming is performed by the above-mentioned device, the metal strip 9 is passed through the felt-shaped pad 8a so that it slides on the felt-shaped pad 8a at the central portion held by the holding plate 8. There is a defect that surface defects such as scratches occur on the surface of the metal strip 9 due to the metal powder or metal pieces attached to the felt-like pad 8a, and when the plate width of the metal strip 9 is changed, the rings on both sides changed. Since the holding plate 8 having a width matching the interval between 1a must be reassembled each time, the holding plates 8 of various widths must be prepared, which is uneconomical and time-consuming for this reassembling work. It took time and the workability and safety were poor. Further, even if the metal strip 9 is sandwiched between the rings 1a on both sides by the pressing plate 8 as described above, the metal strip 9 is a particularly wide and thin metal strip and is in a state where the shape defect or the plate thickness variation is large. When the tension fluctuation applied to the metal strip is greatly applied to this, the metal strip 9 meanders through the ring 1a on both sides depending on the degree to which the metal strip 9 is clamped by the pressing plate 8.
Between the metal strips 9
There were also wrinkles, plate breaks, and narrowing down.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art and causes wrinkles, plate folds, flexures and plate escapes even for metal strips of various materials, thicknesses and widths. It is possible to improve the plate width accuracy of the side trimmed metal strip by passing it through the side trimming device in a stable state without performing the operation, especially with high precision and high speed even for wide and thin metal strips or badly shaped metal strips. It is an object of the present invention to provide a side trimming method for a metal strip that can perform side trimming and can perform side trimming on a metal strip without deteriorating the surface quality of the metal strip, and an apparatus suitable for implementing this method. To do.

[0009]

As a result of intensive studies to solve the above problems, the present inventor has found that various problems can be solved and side trimming can be carried out without problems even in a wide thin metal strip which is difficult to trim side by side. The method of performing side trimming in a state where a predetermined tension is applied in advance to the metal strip threaded through the side trimming device is adopted in the position between a pair of round blades arranged on both sides of the side trimming device. In order to surely prevent the bending of the metal strip that occurs, deflector rolls are arranged on the inlet side and the outlet side of the side trimming device in the direction of passage of the metal strip, and the tensioned metal strip is passed through these deflector rolls. By passing the metal strip, a restraining force is applied in the width direction of the metal strip, and the metal generated by the restraining force in the width direction of the metal strip is further applied. Deflection is of the present invention has been completed by investigating that may be constrained by the entry side support roll disposed in the vicinity of the side trimming apparatus of the strip.

A metal strip side trimming method according to the present invention and a metal strip side trimming apparatus according to the present invention suitable for carrying out this method will be described in detail below with reference to the drawings. FIG. 1 is a front explanatory view showing a state in which the method of the present invention is being carried out by one embodiment of a side trimming device for metal strips according to the present invention, and FIG. 2 shows an entrance side portion of the side trimming device for metal strips in FIG. FIG. 3 is a front view showing a state in which the method of the present invention is being carried out by another embodiment of the side trimming device for metal strips according to the present invention.

In order to carry out the method of the present invention, the side trimming device incorporating the pressing plate 8 shown in FIG. 4 which has been used conventionally is not used, but instead, explanatory views and perspective views of FIGS. 1 to 3 are used. It is carried out by using the device configured as shown in FIG. 4, but the side trimming device itself is basically the same as the device shown in FIG. 4 and described above except that the holding plate 8 is not present. There is no inconvenience when using the apparatus having the structure, and it is possible to use either the type in which the side trimming level of the metal strip by the round blade as described above is always invariable or the type in which the side trimming level changes. However, depending on which type is used, the structure of the inventive method and apparatus changes as described below. Wide thin metal strips such as wide thin metal strips (for example, a metal strip having a thickness of 0.5 mm or less and a strip width of 1000 mm or more), shape defects, and the like, which are difficult to side-trim in the past, have various drawbacks. In order to eliminate the above problem and to carry out plate passing without any problem and side trimming, it is necessary to apply a tension generated by an arbitrary tension generating mechanism, that is, a substantially predetermined tension to the metal strip. Further, it is preferable that the predetermined tension can be adjusted during the threading according to the metal strip to be threaded. As described above, the mechanism for generating the tension applied to the metal band may be a generally used mechanism, for example, a tension bridle roll, a tension reel, a pinch roll, or a combination of these, and the adjustments associated with each are possible. What has a control mechanism may be appropriately used.

Therefore, as shown in FIGS. 1 and 2, a state in which a predetermined tension generated by an arbitrary tension generating mechanism (not shown) is applied to the front side of the side trimming device 1 and the rear side of the outlet side of the line. In order to side trim both side ends of the metal strip 9 which is continuously threaded through, the side trimming device 1 is sandwiched by rings 1a lined with elastic bodies such as urethane rubber from the both sides. A ring provided on each of the round blades 1ba, 1bb by arranging the pair of round blades 1ba, 1bb in correspondence with predetermined trim positions at both end portions of the metal strip 9 to be side-trimmed.
Both ends of the metal strip 9 are cut off by the round blades 1ba and 1bb while sandwiching both ends of the metal strip 9 at positions corresponding to predetermined trim positions with 1a.

At the entrance side of the side trimming device 1,
A first deflector roll 2 that bends one surface of the metal strip 9 in a state in which a predetermined tension is applied along its outer peripheral surface, and the other surface of the metal strip 9 that is bendable along the first deflector roll 2 Second deflector roll 3 for bending
Are arranged. And this second deflector roll 3
Is preferable in that it can be effectively provided with a restraining force in the width direction on the metal strip 9 that passes through the side trimming device 1. However, for the reasons described later, the side trimming device 1 is preferable. In many cases, it cannot be installed in the vicinity of. These deflector rolls 2 and 3 have metal strips 9
The roll may be a free roll that bends in a predetermined direction along a predetermined amount depending on the case, but may be a roll provided with an auxiliary drive device so as to rotate in synchronization with the passage speed of the metal strip 9. The first and second deflector rolls 2
When 3 and 3 are free rolls, the moment of inertia (GD ^{2) of the} load is prevented so as to prevent the surface of metal strip 9 from causing surface defects such as scratches by rotating in synchronization with the passage speed of metal strip 9. The roll diameter, the roll internal structure, the surface properties, and the like are appropriately set so that the value of () is an appropriate value.

In the vicinity of the side trimming device 1 between the second deflector roll 3 and the side trimming device 1, a flat support roll 4 lined with urethane rubber or the like on the surface is provided on the second side of the metal strip 9. It is arranged on the surface opposite to the surface in contact with the deflector roll 3 over the entire width of the metal strip 9 so as to at least slightly contact with it. The support roll 4 may be a free roll or a roll provided with an auxiliary drive device so as to rotate in synchronization with the threading speed of the metal strip 9. Further, an elevating means is provided so that the contact state with the metal strip 9 can be adjusted. Is preferably provided. Although there are various means as the elevating means, a worm jack method by manual operation or electric conduction is preferable because it can be accurately controlled and adjusted. Further, since the support roll 4 contacts the second deflector roll 3 and is constrained in the width direction and bent, the metal band 9 is bent in a gutter shape with the surface in contact with the second deflector roll 3 inside. Since it plays the role of surely preventing it, it is preferable that the contact state with the metal strip 9 can be set and adjusted according to the plate thickness, the plate width, the shape, the material (proof strength, hardness, etc.) of the metal strip 9. For example, when the metal strip 9 is a wide and thin metal strip, its shape is deteriorated, or it is passed in an unstable state due to its high yield strength and hardness, the surface of the metal strip 9 is slightly It is preferable to adjust to a pressed state to increase the restraining force in the width direction.

It should be noted here that when the contact of the support roll 4 with the metal strip 9 is made larger than necessary and the metal strip 9 is strongly pressed, the surface of the metal strip 9 in contact with the support roll 4 is inward. Since the metal strip 9 bends like a gutter, the contact state of the support roll 4 with the metal strip 9 is appropriately set by the elevating means according to the size, shape, material, etc. of the metal strip 9. And adjust. The contact state of the support roll 4 with the metal strip 9 is, for example, the plate thickness.
Metal strip 9 of 0.5 mm or less and a plate width of 1000 mm to 1600 mm
It has been confirmed by the present inventor that the desired effect can be obtained if the contact winding angle of the support roll 4 with the support roll 4 is in the range of 0 ° to 10 °. Also this support roll 4
Is a second deflector roll 3 and a side trimming device 1
It is installed in the vicinity of the side trimming device 1 between and, and in order to prevent slip flaws from occurring on the metal strip 9, the surface of the metal strip 9 can withstand at least a state of being slightly pressed. The roll diameter, the roll internal structure, and the surface properties thereof may be appropriately set so that the strength and wear resistance and the moment of inertia (GD ² ) of the load thereof have appropriate values.

On the output side of the side trimming device 1, there are disposed output side deflector rolls 5 and 6 for restraining the metal strip 9 or pinch rolls 7 composed of a pair of rolls 7a and 7b, and the output side deflector roll 5 is provided. , 6 or the pinch roll 7 is preferably arranged at a position as close as possible to the side trimming device 1 so that a restraining force in the width direction can be effectively applied to the metal strip 9 that passes through.

In the method of applying the restraining force in the width direction of the metal strip 9 by passing through the deflector rolls 2, 3 and 5, 6 as described above, the deflector rolls 3 or 5 of the side trimming device 1 are used. The shorter the distance is, the more effectively the binding force in the width direction of the metal strip 9 that passes through the side trimming device 1 can be effectively given.
The deflector rolls 2 and 3 and the deflector rolls 5 and 6 are provided with auxiliary devices for adjusting the tension applied to the metal strip 9, or the side trimming device 1 itself is provided with a drive device or the like. Since there is a space where the round blades can be exchanged, there is a limit to shortening the distance from the deflector roll 3 or 5 to the side trimming device 1, and the wider the strip width of the metal strip 9 is, As the plate thickness becomes thinner, the rigidity of the metal strip 9 in the width direction becomes lower, and the metal strip 9 bends in a gutter shape, swings or meanders in an unstable state as shown by the alternate long and short dash line in FIG. Since the plate width accuracy of the metal strip 9 that has been passed through and side trimmed is deteriorated, and if the shape of the metal strip 9 is bad or the tension changes abruptly, bending, wobbling or meandering is likely to occur Size to width If the plate width precision of the metal strip 9 unable trimming or the worst deterioration is the state that can not be side trimmed or is excised bent occurs.

Therefore, in carrying out the method of the present invention, it is important to set the distance from the deflector roll 3 or 5 to the side trimming device 1 as short as possible, but it is difficult to set the distance as short as possible because of the above limit. The above-mentioned support roll 4 is arranged within this distance, and the unstable passing state and defective state are eliminated by the action of increasing the restraining force of the roll 4 in the width direction of the metal strip 9.

The above description of the method of the present invention and the apparatus related thereto is the side trimming apparatus 1 itself, in which the side trimming level of the metal strip 9 by the round blades 1ba and 1bb is always unchanged. Although it can be applied to both the type and the changing type, the following description will be given only when the latter changing type is applicable and applicable, omitting the duplicated description. Description will be made with reference to the same FIGS. The lower round blade 1bb is arranged at a fixed position in the side trimming device 1 arranged at a fixed position in the line. As mentioned above, not only the lower round blade 1bb but also the upper round blade 1ba are cared for and used repeatedly, so the diameter changes from new to scrap. Due to such a diameter change, side trimming is performed while vertically moving the upper round blade 1ba up and down with respect to the lower round blade 1bb in a fixed position and performing an appropriate lap setting.

Therefore, the metal strip 9 passing through the side trimming device 1 must be vertically moved (moved) in accordance with the vertical movement of the upper round blade 1ba. That is,
The side trimming level of the metal strip 9 in the side trimming device 1 must be raised or lowered (moved). Further, in the method of the present invention for side-trimming the metal strip 9 in the tensioned state, the side-trimming device 1 is always matched with the side-trimming level of the metal strip 9 which is changed by moving up and down as described above. It is necessary to keep the metal strip 9 that passes through the plate horizontal or almost horizontal. That is, the metal strip 9 from the entrance side to the exit side of the side trimming device 1
However, it is necessary to pass the plate horizontally when it is horizontal.
This is a metal strip 9 to which a particular tension is applied to the side trimming device 1 at an angle in the vertical and diagonal directions.
When the metal strip 9 is passed through and passed through, the metal strip 9 is wound around the round blades 1ba, 1bb and the ring 1a by a certain amount, not only the wear of the ring 1a is increased, but also both end portions are cut off. This is because the circular blades 1ba and 1bb and the tip of the blades cause the pressing pattern and the flaws on the surface of the metal strip 9.

Therefore, such a side trimming device 1
In the case of using, the metal strip 9 continuously threaded to the side trimming device 1 arranged at a fixed position in the line is used.
The first deflector roll 2 and the outlet deflector roll 6, which are respectively arranged at predetermined positions on the inlet side and the outlet side of the roller, rotate at the respective predetermined positions, and on the other hand, the side trimming device 1 is displaced from the deflector rolls 2, 6 respectively. The second deflector roll 3 and the outgoing deflector roll 5 disposed in the side trimming device 1 can be moved up and down so as to follow the side trimming level of the metal strip 9 that changes according to the diameter change of the pair of round blades 1ba and 1bb in the side trimming device 1. Further, the support roll 4 arranged near the entrance side of the side trimming device 1 is lifted and rotated so that the metal strip 9 passing through the roll surface is slightly pressed and at least contacted. Then, the side trimming device 1 can perform side trimming while passing the metal strip 9 through each roll in sequence.

In this case, the second deflector roll 3 and the exit-side deflector roll 5 are capable of following the side trimming level of the metal strip 9 which changes according to the diameter change of the round blades 1ba and 1bb, and also pass through the metal strip 9. Corresponding to the above, the amount of bending and winding along both deflector rolls 3 and 5 (the winding amount of the metal strip 9 or the winding angle thereof) is also adjusted so that it can be vertically moved and rotated. It is desirable to keep it. Further, as shown in FIG. 3, it is possible to dispose the rolls 2, 3, 4, 5 and 6 shown in FIG. The pinch roll 7 is used in place of the output side deflector rolls 5 and 6 for passing the metal strip 9 that has been side-trimmed by the side trimming device 1, although the restraining force in the width direction of the metal strip 9 is slightly weakened. It is also desirable to raise and lower and rotate the pair of rolls 7a and 7b. As the elevating means for the respective deflector rolls 5 and 6, a worm jack system is preferable as in the elevating means for the support roll 4.

[0023]

The method of the present invention utilizes the apparatus of the present invention constructed as described above, and one surface of the first deflector roll 2
Between the second deflector roll 3 and the side trimming device 1 by bending the metal strip 9 along the second deflector roll 3 and then bending the other surface along the second deflector roll 3 under a predetermined tension. 2nd near the side trimming device 1
At least the entire width of the support roll 4 is brought into contact with the surface opposite to the surface in contact with the deflector roll 3 and then passed through the side trimming device 1. Then, the metal strip 9 which has been side-trimmed by the side-trimming device 1 is passed through the exit-side deflector rolls 5 and 6.
Prior to this threading, the round blade 1b is well-maintained and has a known diameter.
Since a and 1bb are rearranged, the side trimming level of the metal strip 9 in the side trimming device 1 is determined and set. The second deflector roll 3 and the outgoing deflector roll 5 or the pinch roll 7 in place of the roll 5 is moved up and down by the respective lifting means so as to match the set side trimming level. Further, the support roll 4 is adjusted and set by the elevating means so as to achieve the purpose accompanying these sets, and the metal strip 9 is continuously threaded. The adjustment of the support roll 4 is not normally performed during the passage of the plate, but the tension applied to the metal strip 9 is adjusted according to the metal strip 9 in the passage.

Further, the method of the present invention can be carried out anywhere when the side trimming is performed in a state where a predetermined tension is applied to the metal strip 9 which is passed through the side trimming device 1, and this metal strip is used. The plate passing direction A of 9 is not limited to the horizontal direction as shown in FIGS. 1 to 3 and described above, and it is possible to pass the plate in the vertical direction. In any case, when the tensioned metal strip 9 is passed through the side trimming device 1, the metal strip 9 passing through the second deflector roll 3 is tensioned. Deflection in a gutter shape with the surface of the metal strip 9 along the deflector roll 3 inside is such that at least the support roll 4 is in contact with the surface of the metal strip 9 opposite to the surface along the second deflector roll 3. Thus, the restraining force of the metal strip 9 in the width direction can be prevented by the main action of further increasing it.

[0025]

[Embodiment] The first side of 200 mm in diameter having urethane rubber lined on the entrance side of the side trimming device 1 in which the round blades 1ba and 1bb having a diameter of 305 mm are incorporated.
And the second deflector rolls 2 and 3 such that the second deflector roll 3 is located 700 mm from the side trimming device 1 and the exit side of the side trimming device 1 is urethane rubber-lined on the surface and has a diameter of 200 m.
The output deflector rolls 5 and 6 of m are respectively arranged so as to be located at a position 900 mm from the side trimming device 1, and urethane rubber is provided on the surface at a position 300 mm from the side trimming device 1 at the entrance side of the side trimming device 1. SUS30 with a thickness of 0.2mm and a width of 1555mm by installing a support roll 4 with a diameter of 120mm
While applying a tension of 100 N / mm ² to the wide ultra-thin stainless steel strip of 4, the lower surface is bent along the first deflector roll 2 and the upper surface is bent along the second deflector roll 3 so as to pass substantially horizontally. While pressing the support roll 4 on the lower surface so that the winding angle is 5 degrees, (1524 + 5) ~ (1524-
As a result of performing side trimming to a width of 0) mm, when the support roll 4 is not used, the surface where the stainless steel strip comes into contact with the second deflector roll 3 between the second deflector roll 3 and the side trimming device 1. Although it could only be side trimmed to a width of 1530 to 1542 mm by bending it like a gutter with the support roll 4 used, the stainless steel strip did not vibrate or meander, and was stable in a flat plate shape. Thus, it was possible to perform side trimming to a uniform desired width of 1525 to 1527 mm without passing through the side trimming device 1 and causing surface defects such as scratches.

Further, in the same manner as the above-mentioned method, the passing conditions of the metal strip 9 are as follows: the thickness is 0.5 mm to 0.1 mm and the width is 1000 mm to 1600.
metal tension imparting wide vaguely stainless steel strip of various SUS304 in the sheet passing direction A in mm is to 20N / mm ² ~100N / mm ² range (about average 40N / mm ^2), and the support roll 4 When the wrapping angle of the belt 9 is in the range of 0 to 10 degrees and the side trimming is performed by passing through the above side trimming device, the same desired result can be obtained without causing surface defects such as scratches. I was able to do side trimming on the board width.

[0027]

As described above in detail, the side trimming method according to the present invention and the apparatus suitable for carrying out the method are the metal strips reversed by the first and second deflector rolls on the entrance side of the side trimming apparatus. The side trimming device prevents bending of the metal strip by bending at the same direction and at least contacting the support roll with the surface of the metal strip opposite to the surface in contact with the second deflector roll, thereby stabilizing the vibration without meandering. Since it can be passed through the plate, it has various effects as listed below, and its industrial value is very large.

Since there is no member that slides on the surface of the metal strip, scratches do not occur on the side-trimmed metal strip, and a product with excellent surface quality can be manufactured with good productivity. Not only is it economical because no pressing plate is used, but there are no members to be reassembled when the plate width is changed, improving line availability, workability, and safety. When performing side trimming of a metal strip in a state where tension is applied, it can be carried out anywhere, even if it is a metal strip that is threaded vertically as well as horizontally, Further, even if the metal strip to be side-trimmed is a wide and thin metal strip or the shape thereof is deteriorated, the metal strip can be passed through the side-trimming device in a stable state in which deflection is prevented. ,
It is possible to manufacture products with excellent plate width accuracy. In a device that has been side trimmed while applying tension to a conventional metal strip, the above effect can be achieved simply by installing a deflector roll or a support roll.
It can be implemented easily and economically.

[Brief description of drawings]

FIG. 1 is a front explanatory view showing a state in which the method of the present invention is being carried out by an embodiment of a side trimming device for a metal strip according to the present invention.

FIG. 2 is a perspective view showing an entry side portion of the side trimming device for the metal strip in FIG.

FIG. 3 is a front explanatory view showing a state in which the method of the present invention is being carried out by another embodiment of the side trimming device for a metal strip according to the present invention.

FIG. 4 is a sectional view showing a conventional method in which a holding plate is arranged between side trimming devices to perform side trimming.

[Explanation of symbols]

 1 Side trimming device 1a Ring 1ba Upper round blade 1bb Lower round blade 2 1st deflector roll 3 2nd deflector roll 4 Support roll 5 and 6 Deflection side deflector roll 7 Pinch roll 7a, 7b Pinch roll roll 8 Presser plate 8a Felt shape Pad 9 Metal strip A Passing direction of metal strip

Claims (7)

[Claims] 1. A side trimming device (1) having a pair of round blades (1ba, 1bb) at both end portions of a metal strip (8) which is continuously threaded in a state where a predetermined tension is applied in advance. A side trimming method in which one surface is bent along the first deflector roll (2) and then the other surface is bent along the second deflector roll (3) and tension is applied. Side trimming device (1) for metal strip (9)
When performing side trimming with the second metal band (9)
A support roll (4) having a surface opposite to the surface in contact with the deflector roll (3) arranged near the side trimming device (1) between the second deflector roll (3) and the side trimming device (1). Side trimming while slightly pressing the surface of at least while contacting, and then passing the side trimmed metal strip (9) through the deflector rolls (5, 6) or pinch rolls (7). Side trimming method for metal strips. 2. A first deflector arranged at a predetermined position on the inlet side and the outlet side of a metal strip (9) continuously threaded with respect to a side trimming device (1) arranged at a fixed position. The roll (2) and the exit side deflector roll (6) rotate at their respective predetermined positions, while the second deflector roll (3) is arranged closer to the side trimming device (1) than both deflector rolls (2, 6). And the exit-side deflector roll (5) move up and down so as to follow the side trimming level of the metal strip (9) that changes according to the diameter change of the pair of round blades (1ba, 1bb) in the side trimming device (1) and rotate. Then, the support roll (4) arranged near the entrance side of the side trimming device (1)
Is pushed up and down so that it can at least come into contact with the surface of the metal strip (9) that is being threaded by the roll surface,
The side trimming method for a metal strip according to claim 1, wherein side trimming is performed by a side trimming device (1) while passing the metal strip (9) through each roll. 3. The second deflector roll (3) and the outgoing deflector roll (5) change according to the diameter change of the pair of round blades (1ba, 1bb) in the side trimming device (1) arranged at a fixed position. The amount of bending that can follow the side trimming level of the metal strip (9) and that is bent along both deflector rolls (3, 5) according to the passing metal strip (9) (the amount of winding of the metal strip) Or, the support roll (4) arranged in the vicinity of the entrance side of the side trimming device (1) is moved up and down so that it can be finely adjusted in accordance with the winding angle of the support roll (4). The side trimming device (1) side trims while slightly pressing the surface of the metal strip (9), moving up and down so as to make at least contact, and rotating, and passing the metal strip (9) through each roll. Or side trimming of the metal strip described in 2. Method. 4. When a pinch roll (7) is used instead of the deflector rolls (5, 6) for passing the metal strip (9) which has been side-trimmed by the side trimming device (1), 4. The side trimming method for a metal strip according to claim 1, wherein the pinch rolls (7a, 7b) are moved up and down and rotated. 5. The tension to be applied during the threading is adjusted according to the metal strip (9) which is continuously threaded in the state where a predetermined tension is applied in advance. The method of side trimming the metal strips described. 6. A tension generator capable of preliminarily applying a predetermined tension to a metal strip (9) to be side-trimmed by a side trimming device (1) and adjusting the applied tension during passing through the strip according to the metal strip (9). Equipped with a mechanism, side trimming device
Bending one side of the metal strip (9) that is threaded in a state where tension is applied to the entrance side of (1) along the outer peripheral surface of the roll
A deflector roll (2) and a second deflector roll (3) for bending the other surface of the metal strip (9) along the outer peripheral surface of the roll are provided, and the second deflector roll (3) and the side trimming device are provided. Side trimming device between (1)
In the vicinity of (1), the surface opposite to the surface contacting the second deflector roll (3) is slightly pressed by the roll surface, and at least the support roll (4) which is in contact can adjust the contact state with the metal band (9). The deflector rolls (5, 6) or pinch rolls (7) are provided with lifting means and pass the metal strip (9) that has been side-trimmed to the exit side of the side trimming device (1). A side trimming device for a metal band, wherein the side trimming device is provided. 7. A second deflector roll (3) and an outlet deflector roll (5) according to a diameter change of a pair of round blades (1ba, 1bb) in a side trimming device (1) arranged at a fixed position. 7. The metal strip side trimming device according to claim 6, further comprising an elevating means capable of following the changing side trimming level of the metal strip (9).