JP4184587B2 - Automatic shearing method for short steel sheets - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic shearing method for a steel sheet short material capable of shearing and conveying both side edge portions in a steel plate of a short material.
[0002]
[Prior art]
When cutting a rolled steel plate (thick plate) into a custom product, it is roughly divided into a predetermined dimension in the longitudinal direction according to the plate cutting dimension in advance, and the width is cut according to the width of each product (ear cutting or middle cutting) The product is then cut into lengths according to the product length, and the product is collected.
In the both side ear part (edge part) shearing device (double side shear) in the present situation where such a steel sheet cutting method is adopted, between the pinch rolls sandwiching the longitudinal ends of the steel sheet with upper and lower rolls Since the double side shear is installed in the steel plate, a device having a space corresponding to the capacity (arrangement) of the existing equipment is arranged in the longitudinal direction of the steel plate.
[0003]
In such existing facilities, the distance between the pinch rolls located above and downstream of the conveyance line of the double side shear portion of the steel sheet is usually around 6 m (depending on the facility capacity (arrangement)), and below this dimension When the steel sheet that has been divided and cut is transported to the downstream side and released from the clamping force of the upstream pinch roll, the steel sheet has a short length so that it does not reach the downstream pinch roll. Losing the means to be driven, the steel plate stays inside the double side shear, causing a major trouble that the production line must be stopped.
[0004]
Therefore, when the order size of the steel sheet (mainly 3m or more) is the short dimension as described above, it is unavoidable that the dimension is within the range that can be clamped by either the upstream or downstream pinch roll according to the equipment capacity. In order to do so, the steel sheet with the short dimension to be sheared is combined with the other steel sheets before and after, and cut into long dimensions. The plate was cut to a predetermined size by cutting to fit each size.
[0005]
[Problems to be solved by the invention]
As described above, in a double-sided shear of a steel plate, it is impossible to shear a short material alone, and since the product cutting operation of the combined material is usually performed by off-line gas cutting, it is It took a lot of time and was regarded as a problem because it was a major factor in inhibiting productivity and increasing costs in a series of processes.
[0006]
Under such circumstances, development of a technique for processing a steel sheet having a short dimension online has been strongly desired. An object of the present invention is to provide a technique for dealing with such a demand.
[0007]
[Means for Solving the Problems]
The present invention has been made in order to solve the problems in the above-described conventional methods, and the gist thereof is the following means.
(1) A traverse girder installed so as to traverse above the upper and downstream pinch rolls when processing a short steel sheet that cannot be sandwiched by the upper and downstream pinch rolls in the shearing machine at both side edge portions of the steel plate. A traveling girder is installed to be able to travel between, and a magnet is suspended on a gantry that can move on the traveling girder, and a steel plate to be transported by the magnet is magnetically supported to shear both side edges of the steel plate. And automatic shearing method for short steel sheet material to be conveyed.
(2) The automatic shearing method for a steel sheet short material according to (1), wherein a traveling propulsion mechanism is provided in a traveling girder when the steel plate is conveyed by the magnet, and the frame can be traveled by the traveling propulsion mechanism.
[0008]
(3) When magnetically attaching a steel plate with the magnet, a rack and a pinion device are provided for the traveling girder and the traveling girder, respectively, for moving the magnet at the same time as the moving shear body. The automatic shearing method of a steel sheet short material according to (1) or (2), wherein the shearing machine body can follow the traveling opening and closing movement according to the cutting width of the steel sheet and traverse the traveling girder.
(4) When demagnetizing the magnet magnetized with the steel plate, a frame body is provided to surround the magnet in order to release the steel plate from the magnet, and the frame body is lowered below the magnet magnetized surface. The method for automatically shearing a short steel sheet material according to any one of (1) to (3).
[0009]
(5) When magnetically attaching the magnet to the steel plate, the magnetic force excited to the magnet is divided into several stages so that it can be appropriately selected according to the conditions of the steel plate. Automatic shearing method for short steel sheets.
(6) When the magnet is magnetically attached to a steel plate, a universal joint is used at the joint between the magnet and the column that suspends the magnet. The steel plate short material according to any one of (1) to (5) Automatic shearing method.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
From the standpoint that it is difficult to install a complicated dedicated drive device and the accompanying control mechanism due to the capacity of existing facilities (space problem) and productivity problems, the present inventors As a result of earnestly studying whether to secure the means for moving the short steel plate, the means for fixing the steel plate (including prevention of skew feeding of the steel plate) and transporting it within the large constraints on the equipment (securing space) As a means (corresponding to a state in which the steel plate is free between the pinch rolls), the use of a magnet has led to the temporary fixation of the steel plate (magnetic adhesion support) and subsequent conveyance (magnetic adhesion transfer).
[0011]
In the present invention, the magnetized carrying of a steel plate by a magnet means that the steel plate is held in a magnetized state without being lifted by the magnet, and the magnetizing transfer means that the steel plate is magnetically carried by the magnet. In this state, it means to move while sliding on the center roller located at the center in the width direction of the steel sheet.
[0012]
Furthermore, the present inventors have to move the steel plate freely between the upstream and downstream pinch rolls in order to shear the edge portion of the steel plate and transfer the steel plate. Then, we examined further about the apparatus and method of what form is most suitable.
[0013]
For the movement in the width direction of the steel plate, use the movement on the operating side of the double side shear main body of the existing equipment, and for the movement in the length direction of the steel plate, the traverse girder installed at the upper part of the upper / downstream pinch roll housing If a new girder (for traveling) is installed in between and the magnets are moved in the desired direction using both girders, it does not occupy a large space and requires only the addition of the minimum required drive mechanism. Therefore, the conclusion has been reached that the problem can be easily solved with a small equipment cost.
[0014]
Hereinafter, the contents of the present invention will be described based on a side view 1, a front view 2 and a perspective view 3 showing a general part of the equipment used in the present invention.
A traveling girder 3 is installed between the existing transverse girders 13a and 13b installed above the upper and downstream pinch rolls 10a and 13b so as to be movable in the width direction (arrow direction) of the steel plate 1, and a magnet is provided on the girder 3. A magnet mount 4 having a built-in suspension 2 is disposed. The gantry 4 includes a magnet 2 and its attached devices, for example, an elevating cylinder 4a.
[0015]
As the traveling propulsion mechanism of the gantry 4, there are a screw propulsion method (pole screw mechanism), a chain propulsion method, and the like. In this example, the screw propulsion method is used.
That is, the screw shaft 5 is placed on the traveling girder 3 and the female screw body 5a to be screwed into the screw shaft 5 and the gantry 4 are combined and placed, and the motor 6 provided at one end of the screw shaft 5 is placed. The structure which can move the mount frame 4 on the traveling girder 3 in the direction of the downstream pinch roll 10b by propelling the female screw body 5a by rotating the screw shaft 5 by a rotational force is adopted.
[0016]
When shearing the steel plate edge in the shearing machine, both sides must be sheared in accordance with the width of the steel plate 1 being conveyed, so the double side shear is a double side shear main body that supports the fixed shear blade 11. 7b and the double side shear main body 7a that supports the moving-side shearing blade 12 that is movable in the steel plate width direction, and the edge portion can be sheared appropriately in accordance with the steel plate width dimension. It is configured as follows.
[0017]
Therefore, since the steel plate width usually fluctuates to about 1 to 5.5 m, it is necessary to attract the magnet 2 at the center of the steel plate 1 as much as possible when the steel plate 1 is magnetized and supported and transported by the magnet 2. . If this operation is neglected, the steel plate 1 may be skewed, and the steel plate 1 may be sheared while being skewed. Not only does the edge portion cannot be sheared as desired, There is a risk of damage.
[0018]
For this reason, regarding the traversing of the magnet 2, the traverse girder 13 and the rack 9a fixed on the upstream and downstream sides of the movable side 7a of the double side shear main body, the rack 9b fixed to the fixed side 7b of the double side shear main body, Due to the movement of the traverse synchronization pinion 8 installed so as to be movable in the longitudinal direction of the traveling girder 3, the traveling girder 3 also moves along with the movement of the movable side 7a of the double side shear main body by setting the width of the target short steel plate 1. Follow.
[0019]
Since the rack and pinion system is used for the traveling propulsion mechanism of the traveling girder 3 as described above, the magnet 2 suspended from the traveling girder 3 always has a function of being positioned at the center in the width direction of the steel plate 1.
In this way, no unique drive device is required, and the magnet 2 is positioned in the double side shear width setting operation, so it can be saved in a space-saving manner. have.
[0020]
Further, in conjunction with the above operation, the center roller 15 is also moved at the same time and placed at the center in the width direction of the steel plate, and when the steel plate 1 is magnetically supported by the magnet 2, the center roller 15 is moved over the center roller 15. Now you can move while sliding. Further, the upper and downstream pinch rolls 10a and 10b have the same movement on the moving side, so that there is no problem in sandwiching the steel plate 1.
[0021]
When the magnet 2 is positioned at the center of the steel plate 1, the lifting cylinder 4 a is reduced, the magnet 2 is lowered and placed on the steel plate 1 and magnetically attached, and then the screw shaft 5 is driven to remove the steel plate 1. If the magnet 2 is placed on the steel plate 1 and magnetically attached, the load of the magnet 2 is applied to the steel plate 1.
When the steel sheet 1 is conveyed in this state, the running resistance changes with the center roller 15, causing skewing and requiring a propulsive force corresponding to the load. In order to prevent this, after magnetizing the steel plate 1 with the magnet 2, it is preferable to extend the lifting cylinder 4 a so that the magnet 2 is lightly in contact with the steel plate 1.
[0022]
Next, as a problem after the steel plate is magnetized by the magnet 2, when the steel plate 1 once magnetized by the magnet 2 is detached from the magnet 2 by demagnetization, the magnetism remains in the steel plate 1 even if the magnet 2 is demagnetized. Therefore, when the magnet 2 is lifted, the steel plate 1 is temporarily lifted, but since the magnetic adhesion force is weak, it immediately falls and causes the steel plate 1 to skew, or the magnet 2 is not completely demagnetized. In this state, when the steel plate 1 is transported by the downstream pinch roll 10b, the steel plate 1 is moved by dragging the magnet 2, which may cause equipment damage.
[0023]
Therefore, in the present invention, a frame body 14 surrounding the magnet 2 without being fixed to the magnet 2 is provided (see FIG. 3), and when the magnet 2 is demagnetized and raised, the frame body 14 is moved upward from a cylinder or the like. By applying a pressing force to the steel plate 1 (not shown), the steel plate 1 is forcibly separated from the magnet 2 and can be easily separated (equipped with a kick-off device).
[0024]
Furthermore, as for the exciting force of the magnet 2 to the steel plate 1, if the exciting force is too large, the magnetic force remains on the steel plate 1 and there is a possibility that an inconvenient situation of adsorbing excess shearing waste or the like may occur. .
On the other hand, if the excitation force is too small, the attractive force on the steel plate 1 is too weak, so that the steel plate 1 may be skewed due to a decrease in the attractive force between the steel plate 1 and the magnet 2. Applying an appropriate excitation force for the magnet is a large selection factor when the magnet 2 is used.
[0025]
Therefore, if the exciting force of the magnet 2 can be switched to several stages (for example, four stages), the exciting force corresponding to the fluctuation of the plate thickness, length and width of the steel sheet 1 can be appropriately selected. The magnetizing force on one magnet 2 can be maintained in an optimum state, and the steel plate 1 can be supported and transported smoothly.
[0026]
Furthermore, since the surface shape of the steel plate 1 in the as-roll is not necessarily a smooth shape, if the surface of the magnet 2 when contacting the steel plate 1 is fixed in a horizontal plane, the magnet 2 Even if one of the surfaces of the magnet 2 is smoothly bonded to the steel plate 1, a gap is generated between the two and the other surface is not bonded. Things happen.
[0027]
In such a state, the adsorption of the steel plate 1 with the magnet 2 becomes uncertain, and even if the steel plate 1 is temporarily supported, the adsorption state of the steel plate 1 is released by some kind of stagnation during transport. There is a possibility that the edge portion of the steel plate 1 may be damaged by the impact of the contact with the apparatus, and the magnetic steel sheet 1 cannot be held in a reliable state.
Furthermore, skew may occur during transfer of the steel sheet 1 by the magnet 2, and there is a possibility that an appropriate shearing process cannot be performed. In particular, the skew of the material having a poor shape is remarkable.
[0028]
Therefore, in the present invention, the use of a simple universal joint (or pinning) at the joint between the magnet 2 and the column that suspends the magnet 2 prevents the above-described disadvantageous situation from occurring. Since the surface of the magnet 2 adheres as closely as possible to the surface of the steel plate 1, the occurrence of a gap between the two can be minimized and reliable magnetic adhesion is possible.
[0029]
【Example】
Hereinafter, the present invention will be described in detail based on examples.
When the length of the steel plate to be treated is 6 m or more, it can be carried out by a conventional method without using the present invention (in this example, the pinch roll interval is 5.8 m or less). About the thing of 3 m (minimum order length), this invention related apparatus and the motion of the steel plate were shown.
For easy understanding, FIG. 4a shows a schematic plan view of a double side shear zone, and FIG. 4b shows movements of magnets and pinch rolls according to the state of transfer of the steel plate.
[0030]
For example, when an as-roll material in which a product A (width 3500 mm, length 3000 mm) and a product B (width 3800 mm, length 3000 mm) are combined is processed in a shearing line, conventionally, a short shear of 6000 mm or less (including a through plate) is used. ) Was impossible, the products A and B were combined and passed through as-roll, and the gas was cut off-line.
In the present invention, since a short steel plate can be sheared, it is divided into short steel plates A and B by an upstream split shearing machine and subjected to ear cutting with respective product widths.
[0031]
(1) First, the as-roll material in which the products A and B are combined is divided into short pieces (6 m or less) by a split shearing machine located upstream of the double side shear, and the steel plates 1A and 1B are independent. It becomes a short divided piece and is conveyed to the double side shear having the automatic short shearing function of the present invention.
The double side shear main body movable side 7a moves in order to set a cutting target width (product width 3500 mm) of the steel plate 1A that has been conveyed (width 3800 mm). Following this movement, the magnet traveling girder 3 is positioned at the center of the double side shear body 7 by the rack and pinion mechanisms 8, 9a, 9b. That is, the magnet 2 is set at the center in the width direction of the steel plate 1A.
After the steel plate 1A is positioned at a predetermined position, the steel plate 1A is sandwiched by the pinch roll 10a on the upstream side of the double side shear and conveyed into the double side shear. At the same time, the magnet 2 calculates the center position in the length direction of the steel plate 1 from the division length of the steel plate 1A that can be held as a priori information, travels to that position, and puts it in a standby state.
[0032]
(2) Stop the tail end of the transfer steel plate 1A by about 100mm before the upstream pinch roll 10a by tracking, lower the magnet 2 that has been waiting in advance, and magnetically attach and carry the steel plate 1A, then the upstream pinch The roll 10a is opened, and the gantry 4 on which the magnet 2 is suspended is moved on the traveling girder 3 by the screw propulsion mechanism of the traveling girder 3, and the steel plate 1A is conveyed in the transfer direction.
[0033]
(3) The steel plate 1A is stopped at the cutting edge stop position of the double side shear, and both edge portions of the steel plate 1A are sheared by the double side shear.
{Circle over (4)}, {circle over (5)} The steel plate 1A is continuously conveyed for a predetermined distance while being magnetically held, and cutting (basically about 1250 mm cut) is repeated.
[0034]
(6), (7) When the shearing of the entire length of the steel plate 1A is completed, the tip of the steel plate 1A is transported to a position where it can be clamped by the downstream pinch roll 10b, and the upper pinch roll is lowered to the lower pinch roll. Hold it. Thereafter, the magnet 2 is demagnetized and raised, and at the same time, the frame body 14 (kicking device) is operated to completely separate the steel plate 1A from the magnet 2, and then the magnet 2 is retracted to the predetermined standby position.
The steel plate 1A having the edge portion cut into the product size is further conveyed to the next step by the transfer force of the downstream pinch roll 10b.
[0035]
By sequentially performing the above series of operations, shearing and conveyance of both edge portions of the short steel plate are completed. In addition, this series of transfer operations by the magnet has a plurality of patterns depending on the steel plate length, and a method with higher productivity can be adopted.
[0036]
【The invention's effect】
Previously, it was considered impossible to process short materials, and when processing short materials, they were passed as long by combining with other materials, and each product was collected off-line by gas cutting, which is inconvenient in the work process. Although it has been forced to go through complicated steps, the present invention enables online processing and unnecessary processing is unnecessary, which can greatly contribute to improvement in productivity and cost. Can be reduced. Furthermore, a great effect can be exhibited in rationalizing the production process.
[Brief description of the drawings]
FIG. 1 is a side view showing an outline of a double side shear zone of a steel plate used in the present invention. FIG. 2 is a front view showing an outline of a double side shear zone of a steel plate used in the present invention. Fig. 4 is a schematic perspective view of each facility shown to show movement. Fig. 4 is a schematic plan view of a double side shear zone, and a schematic side view showing movement of magnets and pinch rolls according to the state of steel sheet transfer.
DESCRIPTION OF SYMBOLS 1 Steel plate 2 Magnet 2a Support | pillar 3 Traveling girder 4 Magnet mount 4a Lifting cylinder 5 Screw shaft 5a Female thread body 6 Motor 7 Double side shear body 8 Pinion 9 Rack 10 Pinch roll 11 Fixed side shear blade 12 Moving side shear blade 13 Transverse Girder 14 Frame 15 Center roller

Claims (6)

When processing short steel plates that cannot be sandwiched between the upper and downstream pinch rolls of the shearing equipment in the shearing machine at both side edge portions of the steel plate, it travels between the traverse girders installed so that it can traverse above the upper and downstream pinch rolls. A girder is provided so that the girder can run, and a magnet is suspended from a gantry that can move on the running girder, and the steel plate to be transported by the magnet is magnetically supported to shear and transport both side edge portions of the steel plate. An automatic shearing method for a steel sheet short material characterized by being performed. 2. The automatic shearing method for short steel sheets according to claim 1, wherein a traveling propulsion mechanism is provided in a traveling girder so that the frame can be traveled by the traveling propulsion mechanism when transporting the steel sheet by the magnet. . When magnetizing a steel plate with the magnet, in order to set the magnet at the center position in the width direction of the steel plate, a transverse girder that is movable simultaneously with the moving shear body and a rack and a pinion device are arranged on the traveling girder, respectively. 3. The automatic shearing method for short steel sheets according to claim 1 or 2, characterized in that the main body can follow the traveling opening and closing movement according to the cutting width of the steel sheet and traverse the traveling girder. When demagnetizing the magnet magnetized with the steel plate, a frame surrounding the magnet is provided to detach the steel plate from the magnet, and the frame is lowered below the magnet magnetized surface so that the steel plate and the magnet are separated. The automatic shearing method for a short steel sheet material according to any one of claims 1 to 3, wherein the automatic shearing method is performed. The magnetic force excited on the magnet is divided into several stages when the magnet is magnetically attached to the steel plate, and can be selected as appropriate according to the conditions of the steel plate. Automatic shearing method for short steel sheets. The steel plate short material according to any one of claims 1 to 5, wherein a universal joint is used at a joint portion between the magnet and a support column that suspends the magnet when the magnet is magnetically attached to the steel plate. Automatic shearing method.

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