JP5086754B2 - Shearing method for sheet steel - Google Patents

Description

  The present invention relates to a method of cutting a plate (particularly, a steel plate) with a press shear, a press shear device therefor, and a shearing machine. In particular, the present invention relates to a method and apparatus for cutting (shearing) a thin steel plate with a press shear for a thick steel plate (or a press shear having a larger clearance than that for a thin steel plate shear).

  It was impossible to cut a thin plate of less than 4.5 mm with an apparatus that cuts a thick steel plate of 4.5 mm to 70.0 mm with a press shear.

  For example, even when trying to cut a thin plate of less than 4.5 mm with a press shear device for a thick steel plate with a clearance (gap) between the upper and lower blades of the press shear of 2.0 mm, it cannot be cut only by bending. It was.

  As a method for solving this, a method of adjusting the clearance as listed in the following patent document has been considered, but a complicated mechanism for adjusting the clearance is required, or a press shear device for a thick steel plate is large. I couldn't make full use of my processing power. For this reason, in steel sheet scrap recycling sites where various plates must be processed, there is a need for a method that can continuously cut both thick and thin steel plates using a normal press shear device for thick steel plates. It was.

JP 2000-117528 A JP-A-8-276313 Japanese Utility Model Publication No. 6-21816

  An object of the present invention is to continuously apply a thin steel plate (for example, less than 4.5 mm) without adjusting the clearance while utilizing the processing capability of a press shear for thick steel plate (for example, corresponding to 4.5 mm to 70.0 mm). It is to provide a method of cutting. In particular, an object of the invention is a method of cutting a thin plate having a clearance equal to or less than the clearance between the upper blade and the lower blade.

  In order to solve the above-described problems, the present invention provides a thin plate that cannot be cut depending on the clearance between the upper blade and the lower blade in order to cut the thin plate with a press shear for a thick steel plate. And a method of continuously cutting with a press shear (the upper blade moves up and down and the lower blade remains fixed) after being overlapped with the plate and pressed with a prepress device.

  The present invention also provides a press shear (upper plate) after several thin plates are pressure-contacted with a pre-pressing device in order to cut a thin plate having a clearance below the upper blade and lower blade with a thick plate steel press shear. A method in which the blade moves up and down and the lower blade remains fixed.

  In the present invention, in order to cut a thin plate below the clearance between the upper blade and the lower blade by a thick plate steel press shear, the thin plate and the thick plate are overlapped and pressed by a pre-press means, A method in which the upper blade moves up and down and the lower blade remains fixed.

  The present invention also provides a plate stacking means for stacking a thin plate that cannot be cut due to the size of the clearance between the upper blade and the lower blade and another plate so as to have a predetermined thickness or more. A press shear device is provided, characterized by comprising pre-press means for press-contacting the stacked plates by means before cutting.

  The present invention also provides a plate stacking unit for stacking thin plates that cannot be cut due to the clearance between the upper blade and the lower blade and making the thickness equal to or greater than a predetermined thickness. There is provided a press shear device comprising pre-pressing means for press-contacting a plate before cutting.

  The thickness of the thin plate cut by the press shear device can be equal to or less than the clearance between the upper blade and the lower blade.

  Advantageously, the plate stacking means automatically controls the stacking operation (for example by a robot) so that the thickness of the stacked plates is within a predetermined range.

  This automatic control of the overlapping means itself can be realized by known optical, mechanical, electrical, or electronic control, and is not described in detail in this specification. For example, a known thickness sensor element and an electronic calculator are used. It is clear that the stacking operation is controlled to be the maximum (or maximum cost performance) thickness within the processing range (for example, 4.5 mm to 70.0 mm) of the thick plate steel plate press shear by cooperation with the robot arm and the like. Is possible. This can be clearly implemented with reference to the present specification in cooperation with those skilled in the shearing machine field, those in the robot field, and those in the computer field. Among these, the computer can incorporate a program for obtaining an approximate solution of the knapsack problem by a known algorithm or obtaining an optimal solution by full search. A function in the program allows you to enter a set of plates that can be stacked immediately in the current field work situation and the thickness of each plate measured by the sensor element. A set of plates to be stacked can be output.

The invention described in claims 1 to 6 is a thin steel plate that could not be cut conventionally by attaching a pre-press device (pre-press means) to the front stage of the press shear and press-contacting several thin plates or a thin plate and a thick plate. Can be cut continuously.
According to the seventh aspect of the present invention, the continuous cutting according to the present invention can be labor-saving, efficient, and operable for a long time by automatically controlling the stacking operation in the plate stacking means.

  A plate shearing means (lifting magnet and rail) is added to a thick plate steel press shear device (for 4.5mm to 70.0mm) with a fixed upper blade and lower blade clearance (2.0mm) to realize a cutting line. Then, scrap steel plates having a thickness of 0.6 mm to 70.0 mm were fed to the cutting line by adjusting the direction and the like with rails while adjusting the number of stacked steel plates with a lifting magnet (for on-site transportation).

FIG. 1 is a sectional view of a line showing an implementation method according to the present invention that makes full use of a thick plate steel press shear.
10a is obtained by stacking several thin steel plates such as scraps with a lifting magnet (plate stacking means 14).
Reference numeral 11 denotes a steel plate feeder (oscillating conveyor rail, drive unit is omitted), which feeds steel plates that overlap each other at a speed that can be controlled by a swing and a gradient by a swing mechanism (not shown).
Reference numeral 12 denotes a pressure contact table that also serves as a mount for the lower blade (15a).
Reference numeral 13 denotes a pre-pressing device (material pressing cylinder) that presses the overlapped steel plates in cooperation with the pressing table 12 immediately before cutting.
Reference numeral 14 denotes a plate stacking means, which includes a lifting magnet and a rail (not shown).
15a is a lower blade of a known material and shape capable of cutting a steel plate. The shape seen from the front of the line will be described later with reference to FIG.
15b is an upper blade of a known material and shape capable of cutting a steel plate. The shape viewed from the front of the line is a shape obtained by combining two parallelograms, and will be described later with reference to FIG.
Reference numeral 16 denotes a known upper blade mount, which, like a thick steel plate, also plays a role of pushing the cut thin steel plates (overlapping) downward.
Reference numeral 17 denotes a known upper blade actuator (hydraulic cylinder), which moves the upper blade mount 16 up and down to enable cutting and feeding of a new cut portion.
18 is a known stopper. It is possible to continuously stop the steel sheet feeding by tilting and swinging the steel sheet feeding device 11 and continuously cutting it to the required size (100 mm in this case).
19 A lower chute lamp that facilitates transporting the cut steel sheet from the line to the end.

FIG. 2 is an explanatory diagram showing several implementation methods according to the present invention.
10a is an enlarged view of 10a in FIG. 1, and illustrates a mode in which two 3.2 mm steel plates are stacked and cut.
10b explains a mode in which a 1.6 mm steel plate is placed on top and a 3.2 mm steel plate is placed on top and cut two times.
10c describes a mode in which a 3.2 mm steel plate is placed on top and a 1.6 mm steel plate is placed on the bottom and then cut.
10d describes a mode in which four 1.6 mm steel plates are stacked and cut.

FIG. 3 is an explanatory view showing the shapes of the upper blade and the lower blade before and after cutting employed in several methods according to the present invention.
An upper blade 15b having a shape obtained by combining two parallelograms (the upper blade mount 16 is not shown) descends with a hydraulic cylinder 17 (not shown) at 150 mm / second and has a front and rear clearance of 2.0 mm. It shows a view from the front, overlapping.
As can be seen from the figure, since the upper blade has a shape in which two parallelograms are stacked, the steel sheet is cut from both sides, and finally the central part is cut and falls to the lower chute lamp 19 of FIG. become.

In this example, the thin plates were brought into pressure contact with each other by the prepress means 13 (material pressing cylinder) to form several thin plates into a thick plate shape, and cutting was attempted with a thick plate steel press shear device (FIG. 1). A thin steel plate of 0.6 mm to 3.2 mm could not be cut only by being sandwiched and bent by a gap of 2.0 mm, which is the clearance between the upper blade and the lower blade. However, in the case of 0.6 mm, 10 or more sheets were overlapped to make a total of 6.0 mm or more, and in the case of 3.2 mm, 2 or more sheets could be stacked and cut. In addition, although it was not able to cut | disconnect well only by simply stacking without using the prepress means 13, it press-contacts by a prepress before cutting | disconnection, and by making several thin plates into one plate shape, press shear (15, 16 and 17). Similarly, in the case of a thin plate and a thick plate (in the case of 10b and 10c in FIG. 2), it was possible to cut by pressing with a pre-press apparatus.
As described above, 10 or more 0.6 mm steel plates that are clearly smaller than the clearance (2.0 mm) can be stacked and cut normally to 6.0 mm or more, and the present invention can clearly cut steel plates that are less than the clearance. It is to make.

In another embodiment, the computer recognizes the appropriate superposition of the steel plates in the stock of scrap steel plates of various thicknesses, the thickness and size of each steel plate being recognized by an optical method such as a camera. Planning is performed by the program, and the lifting magnet 14 is automatically controlled so as to be fed into the line of the first embodiment, so that unmanned operation and labor saving are achieved.
In yet another embodiment, the shape (position) and orientation of the blade are different from those in the above embodiment, and a plate (particularly a steel plate) that is temporarily pressed so as to increase the rigidity is applied to the pressed surface. By cutting in the vertical direction, even when the gap between the upper blade and the lower blade is larger than the thickness of the plate before pressure welding, cutting is performed in a manner that avoids bending due to tension due to the rigid force increased by pressure welding. It is possible.
Also, including this embodiment, the present invention has been described with respect to a method of cutting while the upper blade moves up and down and the lower blade remains fixed, but the blades face each other and exhibit the effects of the present invention. If so, the positional relationship between the upper blade and the lower blade may not be required, the moving blade may not be the upper blade, and the moving blade may be both blades.

  The present invention can be used for cutting for recycling scrap steel plates. Moreover, it can be widely used at the recycling site of plate-like members.

It is sectional drawing which shows the implementation method by this invention which made full use of the press shear for thick steel plates. Example 1 It is explanatory drawing which showed some implementation methods by this invention. It is explanatory drawing which showed the shape before and behind the cutting | disconnection of the upper blade and lower blade which were employ | adopted with some implementation methods by this invention.

Explanation of symbols

10a, 10b, 10c, 10d Stacked thin steel plates such as scraps 11 Steel plate feeding device (oscillating conveyor rail, drive unit, etc. are omitted)
12 Pressure welding table and lower blade mount 13 Pre-press device (material pressing cylinder)
14 Plate stacking means (omitted lifting magnet and rail not shown)
15a Lower blade 15b Upper blade 16 Upper blade mount 17 Actuator (hydraulic cylinder)
18 Stopper 19 Under-shoot lamp

Claims (2)

In the press shear for thick steel plate,
Steel scraps of various thicknesses, including thin steel plate scraps and thick steel plate scraps,
To cut continuously without adjusting the clearance,
About thin plates with various thicknesses that are thinner than the clearance, which cannot be cut due to the clearance between the upper blade and the lower blade,
After stacking with other various steel plate scraps of various thicknesses by lifting magnet,
The cutting thickness is equal to or greater than a predetermined thickness according to the size of the clearance, and is equal to or less than the cutting ability of the thick plate steel plate press shear,
How to get cut continuously thick steel plates for Puresusha over without adjusting the clearance. After optically recognizing the thickness of each steel plate so that the thickness of the stacked plates is a value that approximates the thickness of the cost performance maximum of the thick plate steel plate press shear ,
The method according to, characterized, according to claim 1 that automatically controls the overlapped by planning a suitable superposition by electronic computer.

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