JP5470210B2 - Running side trimming method - Google Patents

Description

The present invention relates to a running side trimming method for changing cut widths at both ends in the width direction while transporting strips having different widths.

Conventionally, in a processing line for strips (for example, steel plates), a side trimmer that cuts both ends in the width direction of the strip is used as equipment for finishing the strip width to a preset width.
This strip includes a plurality of types of strips having different plate widths. In order to continuously process the strips of each plate width in the above-described processing line, the strips are transported by joining the end portions in the transport direction. . For this reason, in the part (joining position) where the strip width changes, it is necessary to stop the conveyance of the strip and change the position of the side trimmer in the width direction of the strip.

However, when the strip width is changed without stopping the strip conveyance, the following effects can be obtained. Therefore, there is an increasing demand for adjusting the plate width while conveying the strip.
1) The capacity of a strip storage facility such as a loop tower for retaining the strip can be afforded.
2) When a rolling mill exists between the side trimmer and the strip storage facility, it is possible to avoid the generation of stop marks that can be caused by stopping the conveyance of the strip.
3) When changing the width of the side trimmer by stopping the conveyance of the strip, the shearing blade is inserted into the end portion of the strip, so that a half-moon notch formed in the strip becomes unnecessary.

Thus, for example, Patent Document 1 discloses a side trimmer that can change the cutting width of the strip during the conveyance of the strip. Specifically, a housing having a shearing blade is provided on a carrier that can move back and forth in the width direction of the strip, the housing is rotated with respect to the carrier with reference to the rotation center of the housing, and the cutting width of the strip is changed. It is configured to get.
Patent Document 2 discloses a method for calculating the turning speed of the side trimmer housing in the horizontal plane according to a predetermined algorithm based on a sine function using the distance from the width change start to the width change end as a parameter. .

Japanese Patent Publication No.54-15151 JP 2003-89008 A

However, the conventional technique still has the following problems to be solved.
Patent Document 1 describes the device structure of the side trimmer, but the trajectory control of the shearing blade has not been studied. For this reason, if the trajectory control of the shearing blade is not properly performed, the shearing blade receives a large amount of frictional heat when the shearing blade interferes with the shearing end surface of the strip. As it decreases, the durability is impaired.
In Patent Document 2, as shown in FIG. 5A, when the shearing blade 90 is turned, the side trimmer 91 is turned around the center point p of the housing 92. When adjusting the plate width of the strip 93, the housing 92 of the side trimmer 91 is swung on the spot with respect to the transported strip 93. However, for convenience of explanation, in FIG. On the other hand, the side trimmer 91 is shown moving.

In this Patent Document 2, since the shear point of the shear blade 90 is at a position different from the turning center of the shear blade 90 in plan view, the movement trajectory of the housing 92 is also calculated when calculating the trajectory of the shear blade 90. It is necessary to consider, the calculation formula (concept) becomes complicated, and the plate width adjustment for the strips 93 of various plate widths cannot be handled. Further, normally, if the strip is cut with a shearing blade, a cut surface 94 (shaded portion) having a substantially constant depth is formed on the upper side of the strip 93 as shown in FIG. In the method shown in FIG. 5A, a wavy cut surface 95 (shaded portion) may be formed on the upper side of the strip 93 as shown in FIG. In addition, the part except the cut surface of the strip 93 (the lower side of the strip 93) is a broken surface of the strip.
Here, when the cut surface shown in FIG. 5C is formed on the strip, it is determined that the cut surface is rough, and a running cost is required to replace the shear blade regardless of the life of the shear blade.
Moreover, in patent document 2, there is no description regarding the rotational speed of the shear blade with respect to the strip conveyance speed, that is, the lead rate, and there is a possibility that proper cutting may not be performed.

The present invention has been made in view of such circumstances, and provides a running side trimming method capable of forming a good cut surface while easily obtaining a blade trajectory of a shearing blade and suppressing damage to the shearing blade. Objective.

The running side trimming method according to the first invention that meets the above-mentioned object is a plan view of the shearing points of the shearing blades arranged on both sides in the width direction of the joined strips having different widths and cutting the ends of the strips. A side trimming method for changing the cutting width of the strip by using a side trimmer matched to the vicinity of the turning center of the shearing blade and moving each shearing blade in the width direction of the strip while conveying the strip Because
The movement amount D of the shear blade in the width direction of the strip is calculated by the equation (1), and the turning angle θ of the shear blade with respect to the transport direction of the strip is calculated by the equations (2) and (3). , which controls the amount of movement D of the shear blade turning angle theta, and a read rate R _L of higher than the transportation speed of the strip the rotational speed of the shear blades 20% or less than 0, the strip Cutting.
D = C / 2 × cos {π / (L ₀ / V) × t} + C / 2 (1)
θ = tan ⁻¹ V _K −θ ₀ (2)
V _K = C / 2 × {π / (L ₀ / V) / V} × sin {π / (L ₀ / V) × t} (3)
Here, C is the moving distance (mm) of the shearing blade in the width direction of the strip from the change start position or change end position of the strip cutting width to the joining position of the strip, and L ₀ is the change start position of the strip cutting width or Distance in the transport direction of the strip from the change end position to the joining position of the strip (mm), t is a time variable until the shearing blade reaches the joining position of the strip or a variable of time (seconds) from the joining position, V Represents the strip conveyance speed (mm / sec), and θ ₀ represents the initial turning angle (degree) of the shearing blade up to the start position of the change of the cutting width of the strip.

The running side trimming method according to the second aspect of the present invention that meets the above-mentioned object is a plan view of shear points of shearing blades that are arranged on both sides in the width direction of the joined strips having different widths and that respectively cut the ends of the strips. A side trimming method for changing the cutting width of the strip by using a side trimmer matched to the vicinity of the turning center of the shearing blade and moving each shearing blade in the width direction of the strip while conveying the strip Because
The moving speed of the shearing blade in the width direction of the strip is divided into acceleration, constant speed, and deceleration. The shearing blade travel amount Da, the constant speed travel amount Du, and the deceleration. The movement amount Dr at the time is calculated by the equations (4) to (6), respectively, and the turning angle θ of the shear blade with respect to the transport direction of the strip is set as the movement amount Da at the acceleration and the movement at the constant speed. The amount Du and the amount of movement Dr at the time of deceleration are calculated by the equations (7) and (8) to (10), the amount of movement Da at the time of acceleration, the amount of movement Du at the constant speed, and While controlling the movement amount Dr at the time of deceleration and the turning angle θ, the lead rate _RL that makes the rotational speed of the shearing blade faster than the conveying speed of the strip is made to be more than 0 and 20% or less. Cutting.
Da = vt / (2 × ta) × t ² (4)
Du = vt × t + Dta−vt × ta (5)
Dr = −vt / (tr × 2) × t ² + a × t + b (6)
θ = tan ⁻¹ V _K −θ ₀ (7)
V _K = dDa / dL = vt / (ta + V ² ) × L (8)
V _K = dDu / dL = vt / V (9)
V _K = dDr / dL = −vt / (tr + V ² ) × L + a / V (10)
Here, vt is the maximum moving speed of the shearing blade in the width direction of the strip (mm / second), ta is the moving time when the shearing blade is accelerated (seconds), tr is the moving time when the shearing blade is decelerated (seconds), t is a time variable until the shearing blade reaches the joining position of the strip or a time variable (seconds) from the joining position, and Dta is a distance (mm) that the shearing blade moves in the width direction of the strip when the shearing blade is accelerated. , A and b are coefficients for continuing Equations (4) to (6), L is the distance (mm) in the strip conveyance direction from the current position of the shearing blade to the joining position of the strip, and V is the conveyance of the strip The speed (mm / sec), θ ₀ indicates the initial turning angle (degree) of the shear blade up to the start position of the change of the cutting width of the strip.

In the running side trimming method according to the first and second aspects of the invention, the lead rate _RL is calculated and controlled by equation (11).
R _L = √ {V ² + (V × V _K ) ² } / V + R _L0 (11)
Here, R _L0 indicates the initial read rate up to the start position of the change of the cutting width of the strip.

The running side trimming method according to the present invention uses a side trimmer in which the shear point of the shearing blade is matched with the vicinity of the center of rotation of the shearing blade in plan view. A trajectory can be obtained. For this reason, the movement amount and the turning angle of the shear blade in the width direction of the strip do not affect each other, that is, the movement amount is expressed by the expression (1) or the expressions (4) to (6). , Formula (2) and Formula (3), or Formula (7) and Formula (8) to Formula (10), respectively.
Therefore, the blade trajectory of the shearing blade can be easily obtained, and a good cutting surface can be formed on the strip while suppressing damage to the shearing blade.
Further, when controlling the moving amount and the turning angle of the shearing blade, the lead rate _RL of the shearing blade is also adjusted, so that a good cut surface can be formed on the strip while further suppressing damage to the shearing blade.

In particular, since the read rate R _L are defined in formula (11), thereby enabling adequate shear than the control of the movement amount and the turning angle of the shearing blades.

It is explanatory drawing of the running side trimming method which concerns on one embodiment of this invention. It is explanatory drawing of the running side trimming method which concerns on Example 1. FIG. It is explanatory drawing of the running side trimming method which concerns on Example 2. FIG. It is explanatory drawing of the running side trimming method which concerns on Example 3. FIG. (A) is explanatory drawing of the running side trimming method concerning a prior art example, (B) is the schematic diagram of the longitudinal cross-section of the conveyance direction of the normally cut | disconnected strip, (C) is cut | disconnected by the method based on a prior art example It is a schematic diagram of the longitudinal cross-section of the conveyance direction of a strip.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
First, after explaining the side trimmer to which the running side trimming method according to the embodiment of the present invention is applied, the running side trimming method will be explained.

As shown in FIG. 1, the side trimmer 10 includes a pair of shearing blades 13 and 14 disposed on both sides in the width direction of the joined strips 11 and 12 having different widths. Since the one described in Japanese Patent No. 15151 can be used, a brief description will be given below.
The side trimmer 10 is attached and fixed at a predetermined position set in advance, and the joined strips 11 and 12 are conveyed to the side trimmer 10 in the direction of the arrow shown in FIG. In FIG. 1, the side trimmer 10 is shown moving relative to the strips 11 and 12.

The side trimmer 10 has transport tables 15 and 16 disposed on both sides of the strips 11 and 12 in the width direction. Each of the transport tables 15 and 16 is configured to approach or separate from the center position in the width direction of the strips 11 and 12 on a base table (not shown). In addition, although each conveyance stand 15 and 16 becomes a structure which moves synchronously, it is good also as a structure which moves separately.
Housings 17 and 18 having shearing blades 13 and 14 are attached to the respective carriages 15 and 16 so as to be rotatable with respect to the respective carriages 15 and 16 in a horizontal plane.

The shearing blade 13 (the same applies to the shearing blade 14) includes blade portions 19 and 20 that form pairs to sandwich the strips 11 and 12 from both sides in the thickness direction. The blade portions 19 and 20 are rotated by a drive motor (not shown) so that the rotation axis thereof is in the horizontal direction and the strips 11 and 12 can be transported in the transport direction.
Thereby, it has the structure which can cut | disconnect the width direction both ends 21 and 22 of the strips 11 and 12 pinched | interposed.

The housing 17 (similar to the housing 18) is pivotally attached to the carriage 15 via a hinge pin (not shown), and the shear of the shearing blade 13 is located near the axis of the hinge pin, that is, in the vicinity of the pivot center P of the housing 17. A point (cutting position of the strips 11 and 12 by the blade portions 19 and 20) is located. Thereby, the shearing point of the shearing blade 13 is matched with the vicinity of the turning center P of the shearing blade 13 in plan view.
Here, the shear point is adjusted to the vicinity of the turning center P in plan view because the structure of the side trimmer 10, specifically, the pair of blades sandwiching the strip from both sides in the thickness direction is the thickness direction of the strip. And by changing the lapping allowance as the thickness of the strip changes. Therefore, the above-mentioned vicinity is not only when the shear point completely coincides with the turning center P, but also when the shear point is located in the vicinity (peripheral portion) of the turning center P (for example, the shear point is the turning center P). It also includes a case where the radius is 30 mm (and 20 mm) as the center.
In addition, the movement amount of each conveyance stand 15 and 16 in the width direction of the strips 11 and 12, the turning angle θ of each housing 17 and 18, and the rotational speed of each shear blade 13 and 14 are controlled by a control device (not shown). doing.

Next, a running side trimming method according to an embodiment of the present invention will be described with reference to FIG.
In the running side trimming method, the shear blades 13 and 14 are moved in the width direction of the strips 11 and 12 while conveying the strips 11 and 12 having different joint widths without stopping the processing line. This is a method of changing the cutting widths (trimming widths) of both end portions 21 and 22 in the width direction 11 and 12. In addition, the thick line described in the width direction both sides of the strips 11 and 12 in FIG. 1 is a locus | trajectory (blade locus | trajectory) of the shearing blades 13 and 14. FIG.

As shown in FIG. 1, in the strip processed by the running side trimming method, the plate width of the preceding strip 11 is narrower than the plate width of the subsequent strip 12 joined thereto. The width of the strip may be narrower than the width of the preceding strip. Further, in order to smoothly transport the strips 11 and 12 without hindering the transport of the strips 11 and 12 by the corners of the wide strip 12 on both sides of the joining position 23 of the strip 11 and the strip 12, The concave portions (also referred to as side clipping) 24 and 25 are formed, but may not be formed depending on the plate width of the strip to be joined.
Furthermore, the strip is a steel plate, but is not particularly limited, and may be a metal plate such as an aluminum plate or a copper plate, for example, as long as the strips have different widths.

When the strips 11 and 12 are conveyed to the side trimmer 10 and the plate width in the vicinity of the joining position 23 of the strips 11 and 12 is changed, the strips 11 and 12 are arranged so that the plate width at the joining position 23 becomes the smallest. The both ends 21 and 22 are cut. This is because the recesses 24 and 25 described above are formed.
Specifically, the amount of movement of each carriage 15, 16 in the width direction of the strips 11, 12, that is, the amount of movement (blade trajectory) D of the shearing blades 13, 14 is calculated by the equation (1), and each housing 17, turning angle (with respect to the transport direction of the strip 11, 12) for each transport boards 15 and 16 of 18, that is, the width direction of the strip 11, 12 the shearing blade 13, 14 with respect to the tool path _{(V K} line in FIG. 1) The turning angle θ tilted toward the center side is calculated by the equations (2) and (3), and the movement amount D and the turning angle θ are controlled by the control device.
D = C / 2 × cos {π / (L ₀ / V) × t} + C / 2 (1)
θ = tan ⁻¹ V _K −θ ₀ (2)
V _K = C / 2 × {π / (L ₀ / V) / V} × sin {π / (L ₀ / V) × t} (3)

Further, the amount of movement (blade trajectory) of the shearing blades 13 and 14 in the width direction of the strips 11 and 12 is determined by changing the moving speed of the shearing blades 13 and 14 at the time of acceleration, constant speed, and deceleration of the shearing blades 13 and 14. divided, the movement amount Da in each speed range, Du, calculated in each equation Dr (4) ~ (6), with respect to each shear blade 13 and 14 thereof tool trajectory _{(V K} line in FIG. 1) Then, the turning angle θ tilted toward the center in the width direction of the strips 11 and 12 is calculated for each of the movement amounts Da, Du, and Dr in each speed range by the equations (7) and (8) to (10). Further, it is also obtained by a method in which the movement amounts Da, Du, Dr and the turning angle θ are controlled by the control device.
Da = vt / (2 × ta) × t ² (4)
Du = vt × t + Dta−vt × ta (5)
Dr = −vt / (tr × 2) × t ² + a × t + b (6)
θ = tan ⁻¹ V _K −θ ₀ (7)
V _K = dDa / dL = vt / (ta + V ² ) × L (8)
V _K = dDu / dL = vt / V (9)
V _K = dDr / dL = −vt / (tr + V ² ) × L + a / V (10)

Here, C is the moving distance C1 (mm) of the shearing blades 13 and 14 in the width direction of the strip 11 from the change start position S of the cutting width of the strip 11 to the joining position 23 of the strips 11 and 12 in the strip 11. In the strip 12, the moving distance C2 (mm) of the shearing blades 13 and 14 in the width direction of the strip 12 from the cutting end change position E of the strip 12 to the joining position 23.
The moving distances C1 and C2 are, for example, 0 or more than 0 and 300 mm or less depending on the width of the strips 11 and 12 to be joined (preferably, when the lower limit exceeds 0, the lower limit is 25 mm, and further 50 mm The upper limit can be set to 250 mm and even 200 mm.

Further, L ₀ is a distance L1 (mm) in the transport direction of the strip 11 from the change start position S of the cut width of the strip 11 to the joining position 23 in the strip 11, and the cut width of the strip 12 in the strip 12 The distance L2 (mm) in the transport direction of the strip 12 from the change end position E to the joining position 23.
The distances L1 and L2 in the transport direction can be set to, for example, 500 to 5000 mm (preferably the lower limit is 800 mm, the upper limit is 4000 mm, and further 3500 mm) according to the width of the strips 11 and 12 to be joined.

T is a variable (seconds) of time until the shearing blades 13 and 14 reach the joining position 23 in the strip 11, and t of the time from the joining position 23 of the shearing blades 13 and 14 in the strip 12. Variable (seconds). Further, the conveying speed (mm / sec) of the V strip 11, 12, theta ₀ in to change the start position S of the cutting width of the strip 11, the shearing blades 13 and 14 thereof tool trajectory _{(V K} line in FIG. 1) The initial turning angle (initial toe-in: degree) inclined toward the center in the width direction of the strips 11 and 12 is shown.
Here, the time t is, for example, −5 to +5 seconds (preferably the lower limit is −3 seconds and the upper limit is +3 seconds) based on the joining position 23 in consideration of the transport speed V of the strips 11 and 12, etc. Can be set. The conveyance speed V is, for example, about 500 to 7000 mm / second (preferably, the lower limit is 1000 mm / second, the upper limit is 5000 mm / second, and further 3000 mm / second).
Further, the initial turning angle θ ₀ can be set to, for example, 0.1 to 0.25 degrees (preferably, the lower limit is 0.13 degrees and the upper limit is 0.2 degrees).

vt (V _KY ) is the maximum moving speed (mm / second) of the shearing blades 13 and 14 in the width direction of the strips 11 and 12, and depends on the plate thickness of the strips 11 and 12 to be joined, the equipment capacity of the side trimmer 10, etc. Accordingly, for example, it can be set to about 50 to 250 mm / second (preferably, the lower limit is 100 mm / second and the upper limit is 200 mm / second).
Further, ta is a moving time (second) when accelerating the moving speed of the shearing blades 13, 14 that was “0 mm / sec” to the cutting width change start position S, and the inertia of each shearing blade 13, 14. The moment can be set to over 0 and less than 1 second.
Tr is a moving time (second) when the moving speed of the shearing blades 13 and 14 once accelerated is decelerated to a moving speed “0 mm / sec” after the cutting width change end position E; The moment of inertia of each of the shearing blades 13 and 14 can be set to be over 0 and about 1 second or less.
L is a distance (mm) in the transport direction of the strips 11 and 12 from the current position of the shearing blades 13 and 14 to the joining position 23 of the strips 11 and 12.

Dta is the distance (mm) that the shearing blades 13 and 14 moved in the width direction of the strips 11 and 12 when the shearing blades 13 and 14 are accelerated, and the distance that one shearing blade 13 or the shearing blade 14 moved is It is represented by ta × vt / 2.
Further, a and b are coefficients for making the expressions (5) and (6) continuous.
The boundary position between the constant speed and the decelerated speed after the shearing blades 13 and 14 are accelerated is determined by determining the time tr during the deceleration and using the transport speed V and the maximum moving speed vt of the shearing blades 13 and 14. . Therefore, although the value “a × t + b” is obtained by this calculated value, it is also preferable to use the following equation.
a = vt + vt / tr × (ta + tu)
b = C + vt / (tr × 2) × tt−a × tt
Here, tu is the moving time (seconds) at the constant speed from the end of acceleration of the shearing blades 13 and 14 to the start of deceleration, and exceeds 0, for example, 1 depending on the width of the strips 11 and 12 to be joined. Can be set to about seconds or less.
Further, tt is the total movement time (seconds) of the shearing blades 13 and 14 from the cutting width change start position S to the change end position E, and is the total movement time during acceleration, constant speed, and deceleration, ie, “Ta + tu + tr”.

Furthermore, the lead rate _RL that makes the rotational speed of each of the shearing blades 13 and 14 faster than the conveying speed of the strips 11 and 12 exceeds 0 and is 20% or less (preferably, the lower limit is 2% and the upper limit is 10%). However, it is preferable that the read rate _RL is calculated and controlled by the equation (11).
R _L = √ {V ² + (V × V _K ) ² } / V + R _L0 (11)
Here, R _L0 indicates the initial read rate up to the start position of the change of the cutting width of the strip.
The initial read rate R _L0 can be set to, for example, more than 0 and 10% or less (preferably, the lower limit is 2% and the upper limit is 5%).

First, the above equation (1) will be described.
Equation (1) is a cosine function.
Specifically, the strip 11 is a cosine function with a distance L1 from the change start position S to the joining position 23 being ½ period, and the blade locus on both sides in the width direction of the strip 11 narrows toward the joining position 23. As described above, the strip 11 is symmetrical with respect to the center position in the width direction. Note that the starting point of each cosine function of the strip 11 (the point at which the interval between the blade trajectories is maximized) is continuous with the blade trajectory preset in the strip 11 at the change start position S.

Further, the strip 12 is a cosine function with a distance L2 from the joining position 23 to the change end position E being ½ cycle, so that the blade locus on both sides in the width direction of the strip 12 spreads toward the change end position E. In addition, the strip 12 is symmetrical about the center position in the width direction. Each cosine function of the strip 12 has a starting point (a point at which the interval between the blade trajectories is minimum) that is continuous with the respective blade trajectories of the strip 11 at the joining position 23, and an end point (the interval between the blade trajectories is maximized). Point) continues to the blade trajectory preset in the strip 12 at the change end position E.

Even when the plate width of the succeeding strip is narrower than the plate width of the preceding strip, as described above, a cosine function having a different period can be set for each joined strip. However, only the cosine of the preceding strip can be set. You can also set a function.
That is, using a cosine function with a distance L1 from the change start position S to the joining position being ½ cycle, the strip width center of the strip is narrowed toward the joining position so that the blade locus on both sides in the width direction of the preceding strip narrows toward the joining position. It is made symmetrical about the position. Each cosine function of the preceding strip has its starting point (the point at which the interval of the blade trajectory is maximized) continues to the blade trajectory preset in the preceding strip at the change start position S, and its end point (the blade trajectory). The point at which the interval is the minimum) continues to the cutter trajectory preset in the subsequent strip at the change end position E.

Next, the above formulas (2) and (3) will be described.
As shown in the enlarged view of FIG. 1, the turning angle θ'moving speed of the strip in the direction _V K (mm / sec) of the shearing blades 13 and 14, the moving speed in the width direction of the strip (Y direction) _{V KY} ( mm / sec), and the transport speed in the strip transport direction (X direction) is V (mm / sec), it is expressed by equation (12).
_{V KY = V K × V ···} (12)
Further, the turning angle θ ′ of the shearing blades 13 and 14 is expressed by Expression (13).
tan θ ′ = V _KY / V (13)

From the above equations (12) and (13), the turning angle θ ′ of the shearing blades 13 and 14 is expressed by equation (14).
tan θ ′ = V _K
θ ′ = tan ⁻¹ V _K (14)
Since the turning angle θ of the shearing blades 13 and 14 includes the initial turning angle θ ₀ (degrees) of the shearing blades 13 and 14 up to the cutting width change start position S of the strip 11, the equation (14) ) And θ ₀ , and the above-described equation (2) is obtained.

Here, V _K is expressed by Expression (15) by the minute movement amount dD of the shearing blades 13 and 14 and the minute movement amount dL in the strip conveyance direction.
V _K = −dD / dL (15)
Further, the distance L is expressed by Expression (16) by the transport speed V and the time t.
L = V × t (16)
Therefore, the above-described formula (3) is obtained by differentiating the above-described formula (1) with respect to L.
The initial turning angle θ ₀ is set so that the distance between the shearing blades 13 and 14 in plan view is narrower in the strip conveyance direction than the turning angle θ ′. Thereby, the end portions 21 and 22 cut from the strips 11 and 12 are smoothly discharged to the outside of the strips 11 and 12.

Next, the above formulas (4) to (6) will be described.
Equations (4) and (6) are quadratic functions obtained by the equation of motion, and equation (5) is a linear function continuous with equations (4) and (6).
Before and after the change of the cutting width of the strip, since the cutting width is constant, the speed at which each of the shearing blades 13 and 14 moves in the width direction of the strip is 0 mm / second, that is, in a stopped state.
However, when changing the cutting width, the shearing blades 13 and 14 in the strip width direction are moved in the width direction of the strip, moved at a constant speed, and then stopped again. It is necessary to categorize the movement speeds at the time of acceleration, constant speed, and deceleration.

Here, the case where the blade trajectory of the strip 11 shown in FIG. 1 is expressed by the above-described equations (4) to (6) will be described.
First, in the acceleration region of the moving speed of the shearing blades 13 and 14, that is, the region of the moving time ta at the time of acceleration from the cutting width change start position S of the strip 11, the blade trajectories on both sides in the width direction of the strip 11 are joined positions. Equation (4) is symmetric about the center position in the width direction of the strip 11 so as to narrow toward 23. Note that the starting point of equation (4) (the point at which the interval between the blade trajectories is maximized) is continuous with the blade trajectory preset in the strip 11 at the change start position S.

Next, in the constant speed region of the moving speed of the shearing blades 13, 14, that is, the region of the moving time tu at the constant speed after acceleration, the blade locus on both sides in the width direction of the strip 11 is narrowed toward the joining position 23. In addition, Expression (5) is symmetric with respect to the center position in the width direction of the strip 11. Note that the starting point of equation (5) (the point at which the interval between the blade tracks is the maximum) is continuous with the blade track set in equation (4) at the acceleration end position.

And about the deceleration area | region of the moving speed of the shearing blades 13 and 14, ie, the area | region of the movement time tr at the time of deceleration after constant speed, the blade locus | trajectory of the width direction both sides of the strip 11 narrows toward the joining position 23. Equation (6) is symmetrical with respect to the center position of the strip 11 in the width direction. Note that the start point (the point at which the distance between the blade trajectories is the maximum) in Expression (6) is continuous to the blade locus set in Expression (5) at the constant speed end position, and the end point (the distance between the blade paths is the minimum). Is continuous with the blade trajectory of the strip 12 at the joining position 23.

Next, the case where the blade trajectory of the strip 12 shown in FIG. 1 is expressed by the above formulas (4) to (6) will be described.
First, in the acceleration region of the moving speed of the shearing blades 13, 14, that is, the region of time ta at the time of acceleration from the joining position 23, the blade locus on both sides in the width direction of the strip 12 is expanded toward the change end position E. Equation (4) is symmetrical with respect to the center position of the strip 11 in the width direction. Note that the starting point of equation (4) (the point at which the interval between the blade tracks is minimum) is continuous to the blade track of the strip 11 at the joining position 23.

Next, in the constant speed region of the moving speed of the shearing blades 13, 14, that is, the region of time tu at the constant speed after acceleration, the blade locus on both sides in the width direction of the strip 12 is expanded toward the change end position E. In addition, Expression (5) is symmetrical with respect to the center position of the strip 12 in the width direction. Note that the starting point of equation (5) (the point at which the interval between the blade tracks is the minimum) is continuous with the blade track set in equation (4) at the acceleration end position.

Then, in the deceleration region of the moving speed of the shearing blades 13, 14, that is, in the region of time tr during deceleration from the constant speed to the cutting width change end position E of the strip 12, the blade locus on both sides in the width direction of the strip 12. (6) is symmetric with respect to the center position in the width direction of the strip 12 so as to spread toward the end position E. Note that the start point (the point at which the distance between the blade traces is the smallest) in the equation (6) is continuous to the blade locus set in the equation (5) at the constant speed end position, and the end point (the distance between the blade traces is the maximum). At the end point E of the change, the blade trajectory set in advance in the strip 12 is continuous.

Next, the above formula (7) and formula (8) to formula (10) will be described. Since formula (7) is the same as the above formula (2), formula (8) to formula (10) ) Only.
As described above, when the cutting width of the strip is changed, the moving speeds of the shearing blades 13 and 14 are different. Therefore, during acceleration of the shearing blades 13 and 14, at a constant speed, and for each region at the time of deceleration, it is necessary to obtain the respective moving speed V _K.
This V _K is expressed by the above-described equation (15) by the minute movement amounts dDa, dDu, dDr of the shearing blades 13, 14 and the minute movement amount dL in the strip conveyance direction. Moreover, t shown in Formula (4)-Formula (6) has the relationship of above-described Formula (16).
Therefore, by differentiating the above-described expressions (4) to (6) with respect to L, the above-described expressions (8) to (10) are obtained.

Next, the above equation (11) will be described.
As shown in the enlarged view of FIG. 1, the moving distance of the shearing blades 13 and 14 in the direction of the rotation angle θ ′ of the shearing blades 13 and 14 is longer than the moving distance of the strip in the conveying direction. _RL needs to be increased.
Here, the moving speed V _K (mm / sec) of the strip is expressed by Expression (17).
V _K = √ (V ² + V _KY ² ) (17)
By substituting Equation (12) described above into Equation (17), Equation (18) is obtained.
V _K = √ {V ² + (V × V _K ) ² } (18)

Note that the lead rate _RL is a value that makes the rotational speed of each of the shearing blades 13 and 14 faster than the conveying speed V of the strips 11 and 12, and therefore, is represented by Expression (19).
R _L = V _K / V + R _L0 (19)
Therefore, by substituting equation (18) into equation (19), equation (11) described above is obtained.
As described above, the movement amount D of the shearing blades 13 and 14 is calculated by the above-described equation (1), and the turning angle θ of the shearing blades 13 and 14 is calculated by the above-described equations (2) and (3). Then, while controlling the movement amount D and the turning angle θ by the control device, the control device performs the control so that the lead rate _RL exceeds 0 and is 20% or less (further, the above equation (11)). 11 and 12 are cut.
Further, the moving speeds of the shearing blades 13 and 14 in the width direction of the strips 11 and 12 are divided at the time of acceleration, constant speed, and deceleration, and the moving amount Da when the shearing blades 13 and 14 are accelerated, the movement at the constant speed. The amount Du and the moving amount Dr at the time of deceleration are calculated by the equations (4) to (6), respectively, and the turning angle θ of the shearing blades 13 and 14 is calculated by the equation (7) for each of the moving amounts Da, Du, and Dr. And the movement amounts Da, Du, Dr and the turning angle θ are controlled by the control device, and the lead rate _RL exceeds 0 and is less than or equal to 20% by the control device (8) to (10). Furthermore, the strips 11 and 12 can be cut by performing the control according to the above-described formula (11).

The movement amount D and the turning angle θ of the shearing blades 13 and 14 and the lead rate _RL can be calculated, for example, every 0.001 to 0.1 seconds. However, the shorter the time interval, the higher the accuracy. Therefore, the upper limit is preferably set to 0.05 seconds, and more preferably 0.01 seconds.
Thereby, the blade locus | trajectory of the shearing blades 13 and 14 is calculated | required easily, and a favorable cut surface can be formed, suppressing the damage of the shearing blades 13 and 14.

Next, examples carried out for confirming the effects of the present invention will be described.
Example 1
First, regarding the running side trimming method in the case where the plate width of the preceding strip is wider than the plate width of the subsequent strip joined thereto, one side of the shearing blades arranged on both sides in the width direction of the strip is set to the WS side. The other side will be described below as the DS side.
When the strip width direction is the Y coordinate, the transport direction is the X coordinate, the strip cutting width change start position Y coordinate is “0”, and the strip joining position X coordinate is “0”, the shear blade WS side a moving amount D _W of the moving amount D _D shear blades WS side, the above-mentioned using equation (1), respectively are shown as follows. Note that the X coordinate before the change start position of the strip cutting width (before the weld line) is negative, the X coordinate after the change start position (after the weld line) is positive, and one side in the strip width direction (here, the strip width) The Y coordinate on the left side of the transport direction was positive, and the Y coordinate on the other side was negative.
D _W = C1 / 2 × cos {π / (L1 / V) × t} + C1 / 2
D _D = − [C1 / 2 × cos {π / (L1 / V) × t} + C1 / 2]

Further, the turning angle theta _W shear blades WS side, turning angle theta _D of shear blades DS side, the above-mentioned using Equation (2) is shown as follows. “Tan ⁻¹ V _K ” in the formula (2) was multiplied (multiplied) by “180 / π” for conversion.
θ _W = tan ⁻¹ V _K −θ ₀
θ _D = − [tan ⁻¹ V _K −θ ₀ ]
Since the lead rate _RL is the same for each shear blade, the above-described formula (11) is used.
Tables 1 and 2 show the results of calculating the movement amounts D _W and D _D , the turning angles θ _W and θ _D , and the lead rate _RL of each shear blade using the above-described equations.

In the calculation, the moving distance C1 is 150 mm, the moving distance C2 is 0 mm, the conveying direction distance L1 is 3000 mm, and the conveying direction distance L2 is 0 mm.
Further, the time t was set to 2.5 seconds before the weld line, 1.0 second after the weld line, and the conveyance speed V was 1420 mm / second, based on the joining position of the strip (“0”).

As described above, the distance L1 in the transport direction is set to 3000 mm, and the transport speed V is set to 1420 mm / second, whereby the change start position S of the cutting width of the strip is 2.113 seconds (= 3000 / 1420).
The initial turning angle θ ₀ was set to 0.18 degrees, and the initial read rate R _L0 was set to 0.03.
Each numerical value is calculated every 0.1 seconds, but this is for the purpose of reducing the total number of data for convenience of explanation.

The trajectories (WS side trimming trajectory and DS side trimming trajectory) of each shearing blade obtained from this calculation result are shown in FIG.
As shown in FIG. 2, the trajectory of each shearing blade from the preceding strip to the succeeding strip is smooth.
Based on this calculation result, the strip was cut by the control device while controlling the movement amount D _W , D _D , the turning angle θ _W , θ _D , and the lead rate _RL of each shear blade. It was confirmed that a good cut surface could be formed while suppressing damage to the blade.

(Example 2)
Subsequently, with respect to the running side trimming method in the case where the plate width of the preceding strip is narrower than the plate width of the subsequent strip joined thereto, one side of the shearing blade disposed on both sides in the width direction of the strip is set to WS. The following description will be made with the other side as the DS side. The movement amount D _W, D _D and the turning angle theta _W, theta _D of each shearing blade, with the formulas described in Example 1 above. Also, here, the X coordinate before the change start position of the strip cutting width (before the welding line) is negative, the X coordinate after the change start position (after the welding line) is positive, and one side of the strip width direction (here, The Y coordinate on the left side of the strip in the transport direction was changed from positive to negative, and the Y coordinate on the other side was changed from negative to positive.
Tables 3 and 4 show the results of calculating the movement amounts D _W and D _D , the turning angles θ _W and θ _D , and the lead rate _RL of each shear blade.

In the calculation, the moving distance C1 was 75 mm, the moving distance C2 was 150 mm, the conveying direction distance L1 was 1000 mm, and the conveying direction distance L2 was 2000 mm.
Further, the time t is set to -1.0 seconds before the weld line, 1.5 seconds after the weld line, and the conveyance speed V is set to 1420 mm / second, based on the joining position of the strip ("0"). .

As described above, the distance L1 in the transport direction is set to 1000 mm, and the transport speed V is set to 1420 mm / second, so that the change start position S of the strip cutting width is 0.704 seconds (= 1000 / 1420). Further, by setting the distance L2 in the transport direction to 2000 mm and the transport speed V to 1420 mm / second, the strip cutting width change end position E is 1.408 seconds (= 2000/1420) from the joining position. Become.
The initial turning angle θ ₀ was set to 0.18 degrees, and the initial read rate R _L0 was set to 0.03.
Each numerical value is calculated every 0.1 seconds, but this is for the purpose of reducing the total number of data for convenience of explanation.

FIG. 3 shows the trajectories (WS-side trimming trajectory and DS-side trimming trajectory) of each shearing blade obtained from this calculation result.
As shown in FIG. 3, the trajectory of each shearing blade from the preceding strip to the succeeding strip is smooth.
Based on this calculation result, the strip was cut by the control device while controlling the movement amount D _W , D _D , the turning angle θ _W , θ _D , and the lead rate _RL of each shear blade. It was confirmed that a good cut surface could be formed while suppressing damage to the blade.

(Example 3)
Subsequently, with respect to the running side trimming method in the case where the plate width of the preceding strip is narrower than the plate width of the subsequent strip joined thereto, one side of the shearing blade disposed on both sides in the width direction of the strip is set to WS. The following description will be made with the other side as the DS side.
The width direction of the strip is the Y coordinate, the transport direction is the X coordinate (corresponding to the distance L in the transport direction), the Y coordinate of the strip cutting width change start position is “0”, and the X coordinate of the strip joining position is “0”. If a "and the moving amount D _W of shearing blades WS side, the movement amount D _D shear blades WS side, by using the equations (4) to (6), respectively shown as follows. Note that the X coordinate before the change start position of the strip cutting width (before the weld line) is negative, the X coordinate after the change start position (after the weld line) is positive, and one side in the strip width direction (here, the strip width) The Y coordinate on the right side in the transport direction was negative, and the Y coordinate on the other side was positive.
Acceleration: D _W = −Da, constant speed: D _W = −Du, and deceleration: D _W = −Dr
During acceleration: D _D = Da, at constant speed: D _D = Du, and during deceleration: D _D = Dr

Further, the turning angle θ _W on the shear blade WS side and the turning angle θ _D on the shear blade DS side are expressed as follows using the above-described equation (7). “Tan ⁻¹ V _K ” in the formula (7) was multiplied (multiplied) by “180 / π” for conversion.
θ _W = tan ⁻¹ V _K −θ ₀
θ _D = − [tan ⁻¹ V _K −θ ₀ ]
Since the lead rate _RL is the same for each shear blade, the above-described formula (11) is used.
Tables 5 and 6 show the results of calculating the movement amounts D _W and D _D , the turning angles θ _W and θ _D , and the lead rate _RL of each shear blade using the above-described equations.

In the calculation, the moving distance C1 is 0 mm, the moving distance C2 is 100 mm, the moving time ta during acceleration is 0.5 seconds, the moving time tr during deceleration is 0.5 seconds, and the maximum moving speed vt is 120 mm. Per second. Further, the time t is set to −0.750 seconds before the welding line, 1.875 seconds after the welding line, and the conveyance speed V is set to 5000 mm / second, based on the joining position of the strip (“0”). .
From the movement times ta and tr and the maximum movement speed vt, the distance Dta that the shearing blade has moved in the width direction of the strip during acceleration and the distance Dtr that the shearing blade has moved in the width direction of the strip during deceleration can be obtained. By obtaining the difference between the distance C2, the distance Dta, and the distance Dtr, the distance Dtu that the shearing blade has moved in the width direction of the strip at the constant speed can be obtained. Further, since the travel time Tu at the constant speed is obtained from the distance Dtu and the maximum travel speed vt, the total travel time at the time of acceleration, constant speed and deceleration, that is, “ta + tu + tr” is obtained. Accordingly, the distance L2 in the transport direction is 6666.7 mm from the total movement time and the transport speed V.

As described above, by setting the moving time ta at the time of acceleration to 0.5 seconds and the moving time tr at the time of deceleration to 0.5 seconds, the acceleration region of the moving speed of the shearing blade is determined by the joining position of the strip (cut width). From the change start position S) to 0.5 seconds, the deceleration area is from the cutting width change end position E to -0.5 seconds, and the area excluding the acceleration area and the deceleration area is It becomes a constant velocity region.
The initial turning angle θ ₀ was set to 0.18 degrees, and the initial read rate R _L0 was set to 0.03.
The numerical values are calculated every 0.075 seconds, but this is for the purpose of reducing the total number of data for convenience of explanation.

FIG. 4 shows the trajectories (WS-side trimming trajectory and DS-side trimming trajectory) of each shearing blade obtained from this calculation result.
As shown in FIG. 4, the trajectory of each shearing blade from the preceding strip to the succeeding strip is smooth.
Based on this calculation result, the strip was cut by the control device while controlling the movement amount D _W , D _D , the turning angle θ _W , θ _D , and the lead rate _RL of each shear blade. It was confirmed that a good cut surface could be formed while suppressing damage to the blade.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, a case where the running side trimming method of the present invention is configured by combining some or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
The side trimmer to which the running side trimming method of the present invention can be applied is not particularly limited as long as the shear point of the shearing blade is configured to match the vicinity of the turning center of the shearing blade in plan view.
Moreover, although the specific numerical value was described in the said embodiment, this invention is not limited to this.

10: Side trimmer, 11, 12: Strip, 13, 14: Shear blade, 15, 16: Carrier, 17, 18: Housing, 19, 20: Blade, 21, 22: End, 23: Joining position, 24, 25: recess

Claims (2)

A side trimmer in which the shear points of the shearing blades arranged on both sides in the width direction of the joined strips having different widths and cutting the end portions of the strips are aligned with the vicinity of the center of rotation of the shearing blade in plan view, A running side trimming method for changing the cutting width of the strip by moving each shear blade in the width direction of the strip while conveying the strip,
The movement amount D of the shear blade in the width direction of the strip is calculated by the equation (1), and the turning angle θ of the shear blade with respect to the transport direction of the strip is calculated by the equations (2) and (3). , which controls the amount of movement D of the shear blade turning angle theta, and a read rate R _L of higher than the transportation speed of the strip the rotational speed of the shear blades 20% or less than 0, further, the A running side trimming method characterized in that the lead rate _RL is calculated and controlled by equation (11) to cut the strip.
D = C / 2 × cos {π / (L ₀ / V) × t} + C / 2 (1)
θ = tan ⁻¹ V _K −θ ₀ (2)
V _K = C / 2 × {π / (L ₀ / V) / V} × sin {π / (L ₀ / V) × t} (3)
R _L = √ {V ² + (V × V _K ) ² } / V + R _L0 (11)
Here, in the equations (1) to (3), C is the moving distance (mm) of the shearing blade in the width direction of the strip from the change start position or change end position of the strip cutting width to the joining position of the strip, L ₀ is the distance (mm) in the transport direction of the strip from the change start position or change end position of the cutting width of the strip to the joining position of the strip, and t is a time variable or joining until the shearing blade reaches the joining position of the strip time variable from the position (s), V is the transport speed of the strip (mm / sec), theta ₀ is shown initial turning angle of the shearing blades to change the starting position of the cutting width of the strip (degrees), respectively, in the formula (11), R _L0 is shows the initial lead content of up change start position of the cutting width of the strip. A side trimmer in which the shear points of the shearing blades arranged on both sides in the width direction of the joined strips having different widths and cutting the end portions of the strips are aligned with the vicinity of the center of rotation of the shearing blade in plan view, A running side trimming method for changing the cutting width of the strip by moving each shear blade in the width direction of the strip while conveying the strip,
The moving speed of the shearing blade in the width direction of the strip is divided into acceleration, constant speed, and deceleration. The shearing blade travel amount Da, the constant speed travel amount Du, and the deceleration. The movement amount Dr at the time is calculated by the equations (4) to (6), respectively, and the turning angle θ of the shear blade with respect to the transport direction of the strip is set as the movement amount Da at the acceleration and the movement at the constant speed. The amount Du and the amount of movement Dr at the time of deceleration are calculated by the equations (7) and (8) to (10), the amount of movement Da at the time of acceleration, the amount of movement Du at the constant speed, and a moving amount Dr during speed reducer, performs control of turning angle theta, a read rate R _L of higher than the transportation speed of the strip the rotational speed of the shear blades to 20% or less than 0, the read rate R _L is controlled is calculated by the formula (11 '), to perform the cutting of the strip A side trimming method between the runs.
Da = vt / (2 × ta) × t ² (4)
Du = vt × t + Dta−vt × ta (5)
Dr = −vt / (tr × 2) × t ² + a × t + b (6)
θ = tan ⁻¹ V _K −θ ₀ (7)
V _K = dDa / dL = vt / (ta + V ² ) × L (8)
V _K = dDu / dL = vt / V (9)
V _K = dDr / dL = −vt / (tr + V ² ) × L + a / V (10)
R _L = √ {V ² + (V × V _K ) ² } / V + R _L0 (11 ′)
Here, in the equations (4) to (10), vt is the maximum moving speed (mm / sec) of the shearing blade in the width direction of the strip, ta is the moving time during acceleration of the shearing blade, tr is the deceleration of the shearing blade. Travel time, t is the time variable until the shear blade reaches the joining position of the strip or the time variable (seconds) from the joining position, Dta is the shear blade moving in the width direction of the strip when the shearing blade is accelerated The distance (mm), a and b are coefficients for continuing the equations (5) and (6), L is the distance (mm) in the transport direction of the strip from the current position of the shearing blade to the joining position of the strip, the conveying speed of the V strip (mm / sec), theta ₀ is the initial pivot angle of shear blades to change the starting position of the cutting width of the strip (degrees), were shown, respectively, in the formula (11 '), R _L0 is To start position of strip width change It shows the initial lead rate.

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