JPH08290322A - Shearing method and device therefor - Google Patents

Abstract

PURPOSE: To prevent the generation of burrs to the sheared end face by shearing a plate along a shear line after pressing the predetermined shear line on the plate and a shearing predetermined area including both sides of the shear line from the top and back sides of the plate to compression-deform the plate. CONSTITUTION: At the time of passing a shearing predetermined part pressing means, a shearing predetermined area including a predetermined shear line L on band material P is compression-deformed. In the case of this example, step difference (d) caused by shearing force is generated to the end part of a shearing predetermined area Z by compressive deformation. The compression- deformed shearing predetermined part Z is not sheared along the predetermined shear line L at the time of passing a rotary shearing edge pair 2. The shearing force working at this time is in a reverse direction to the case of the pressing means. At this time, burrs 6 formed at the sheared end faces of the respective band material pieces p1, p2 are not protruded from the band material surface not compression-deformed by the step difference (d).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a plate material shearing method and a strip material shearing device.

[0002]

2. Description of the Related Art Conventionally, there has been known a rotary shearing device for cutting a wide strip into strips having a predetermined width. Such a rotary shearing device (B) is inserted into and attached to a pair of rotary shafts (b1) and (b1) arranged in parallel in the vertical direction and each rotary shaft (b1) as shown in FIG. 6, for example. A plurality of shear blades (b2) and a spacer (b3) that fixes each shear blade (b2) on each rotating shaft (b1) at a predetermined interval.
And a bearing member (b4) for driving and transmitting the rotation of each rotary shaft (b1) in a predetermined direction.

By the way, as shown in FIG. 7, a so-called burr (10) is generated on the sheared end face of the strip (product) (p) sheared by the rotary shearing device (B). .
When the burr (10) is formed, there are inconveniences such as scratches on the surface when the products are stacked on each other, and injuries if the product is accidentally touched during transportation.

[0004]

DISCLOSURE OF THE INVENTION The present invention is limited to the generation of burrs when shearing a plate material, such that burrs do not occur on the sheared end surface, or even when products are stacked, they are not scratched and are not touched during transportation. It is to provide a shearing method and a shearing device to be obtained.

[0005]

Thus, according to the invention of "Claim 1" of the present application, "a plate (P) is sheared to a predetermined width by a pair of rotary shear blades (2) and (2)". The plate material
(P) Planned shear line (L) and the planned shear region (Z) including both sides of the plate material (P) are pressed and deformed by compression from the front and back, and then along the shear line (L). And a shearing method.

In the shearing method of the present invention, the compressive deformation applied to the shearing zone (Z) of the plate material (P) is performed by pressing from the front and back of the plate material (P). The deformation is performed so as to form a step (d) sufficient to absorb the height of a so-called burr (6) generated on the sheared end surface.

Further, it is preferable that a shearing force acts in addition to the pressing force during the above-mentioned compression deformation. When applying this shearing force, it is more preferable that the shearing direction is opposite to the shearing direction exerted by the rotary shearing blade.

The present invention can also provide an apparatus for performing the above method. That is, according to the invention of "Claim 2" of the present application, "the rotating shafts (1) (1) arranged in a pair in the upper and lower direction"
A drive / transmission means (4) for rotating each rotating shaft (1) in a predetermined direction, and a driving / transmitting means (4) inserted into each rotating shaft (1) and fixed at a predetermined position, between the rotating shafts (1), (1). At least a pair of upper and lower rotary shear blades (2) and (2) that shear the plate material (P) passing through the plate material (P), and the plate material Shear line (L) that is arranged above and below via P) and is planned for the plate material (P) and the planned shear area (Z) including both sides of it.
Shearing device (A) comprising at least one pair of press rolls (5a) (5a) having at least one pair of press rolls (5a) (5a) that can be compressed and deformed by pressing the plate material (P) from the front and back sides. It

In the shearing device (A) of the present invention, a shearing device or its constituent members known in the art can be used as they are, except that the pre-shearing portion pressing means (5) is provided.

The shearing portion pressing means (5) is provided in front of the rotary shearing blade pair (2) (2) when viewed from the plate material conveying direction. The pre-shearing portion pressing means (5) is arranged above and below the plate material (P), and the shear line (L) is planned for the plate material (P).
And at least one pair of press rolls (5a) (5a) capable of compressing and deforming the planned shearing region (Z) including both sides thereof from the front and back of the plate (P).

The means for pressing the planned shearing portion (5) is
As shown in "Claim 3" of the present application, "a pair of rotary shear blades"
(2) It is further preferable that it is configured so as to give a shearing force substantially opposite to the shearing force received by the plate material (P) by (2).

[0012]

According to the invention of "Claim 1" or "Claim 2" of the present application, the planned shear line (L) on the plate (P) and the planned shear zone (Z) including both sides thereof are sheared. Prior to that, it is pressed from the front and back to be compressed and deformed. The compression-deformed portion is lower than the other portions, and a step (d) is generated at these boundaries. Next, it will be sheared along the shear line (L) scheduled for this compressed and deformed portion, but even if a burr (6) occurs on the sheared end face due to shearing, the step ( Due to d), the burr (6) does not reach the surface of the plate material that has not been compressed and deformed.

According to the invention of "Claim 3" of the present application,
The planned shearing area (Z) of the plate material (P) is compressed and deformed by the shearing part pressing means (5) prior to shearing, and a step (step) is formed between the compressed and uncompressed part. In addition to the occurrence of d), shearing force is also applied to the compressed and deformed portion. Next, a pair of rotary shear blades along the planned shear line (L) for this compressed and deformed part.
(2) It will be sheared by (2), but since the shearing force acting at this time is in the opposite direction to the shearing force exerted by the pressing means (5), burrs (6) generated on the sheared end face
Will be sufficiently lower than the step (d).

[0014]

The present invention will be described in detail below with reference to the illustrated embodiments, but the present invention is not limited thereto. Example 1 FIG. 1 is a schematic front sectional view conceptually showing the basic structure of an example of a shearing device for carrying out the shearing method of the present invention in a sheared state, and FIG. 2 is a schematic side sectional view of an essential part of FIG. . In these figures, the basic constitution of the shearing device (A) is that the rotating shafts (1) (1) arranged in parallel in a pair in the upper and lower direction and the rotating shafts (1) described above.
Plural pairs of upper and lower rotary shear blades (2) and (2) that are inserted into and fixed at predetermined positions, and the rotary shear blades (2) that are inserted and fixed to each rotary shaft (1) at predetermined intervals. A spacer (3) for holding, a bearing member (4) for driving and transmitting rotation in a predetermined direction to each rotating shaft (1), and a shearing portion pressing means (5) provided in front of the rotary shearing blade pair (2). ) And are mainly composed of.

The pre-shearing portion pressing means (5) comprises a plurality of pairs of press rolls (5a) arranged vertically, and each press roll pair (5a) corresponds to each rotary shear blade pair (2). It is provided. In each press roll pair (5a), as shown in detail in FIG. 3, the press roll main body is formed in a truncated cone shape.
The rotation axis (52) of the (51) is inclined so that the pressing surface thereof is substantially parallel to the surface of the plate material (P).

Further, in the press roll pair (5a), the press roll main bodies (51) are provided with a shear line (L) expected to the plate material (P) and a shear zone (Z) including both sides of the shear line (Z).
The arrangement is such that (P) has portions that overlap each other in the vertical direction so that they can be pressed and deformed by being pressed from the front and back.

As clearly shown in FIG. 1, in this example,
The arrangement of the press rolls in each press roll pair (5a) is
The combination of the corresponding rotary shear blade pairs (2) is set in the opposite direction, and the shearing action on the plate material (P) is reversed.

The operation of the shearing device (A) constructed as described above will be explained by taking a wide strip as an example, which is fed from an uncoiler, is passed through the shearing device, is sheared, and is then wound around a decoiler. The uncoiled strip (P) is
In the shearing device (A), after passing between the press roll pair (5a) of the scheduled shearing means pressing means (5), a pair of rotating shafts (1) (1)
It passes through the space and is transported.

First, when passing through the shearing portion pressing means (5), the shearing zone (Z) including the scheduled shear line (L) on the strip (P) is compressed as shown in FIG. Be transformed. In the case of this example, a step (d) due to the shearing force is generated at the end of the region (Z) to be sheared due to the compressive deformation.

Next, the area to be sheared which has undergone compressive deformation.
(Z) will be sheared along its intended shear line (L) as it passes through the rotary shear blade pair (2) (see FIG. 4). The shearing force acting at this time is in the opposite direction to that in the case of the pressing means (5).

As a result, burrs (6) are slightly generated on the sheared end faces of the strips (p1) (p2) cut as shown in FIG. 5, but these burrs (6) Does not protrude from the strip surface (PS) that is not compressed and deformed by the step (d), so even if the cut strips (p1) and (p2) are overlapped with each other, they will not be damaged and will not be transported. You will not be injured because direct contact is prevented.

[0022]

EFFECTS OF THE INVENTION According to the present invention, since burrs do not occur on the sheared end face, or even if burrs are generated, the position is lower than the surface position of the plate materials, even if the cut plate material pieces are superposed on each other, these surfaces will not be formed. It won't hurt, so it won't reduce the product value. Further, even if a hand touches the vicinity of the sheared end when carrying the cut plate material piece, since the burr does not project from the surface of the cut piece, there is no fear of injury due to the burr and it is safe.

[Brief description of drawings]

FIG. 1 is a schematic front sectional view conceptually showing the basic structure in a sheared state of an example of a shearing device for carrying out the shearing method of the present invention.

FIG. 2 is a schematic side sectional view of an essential part of FIG.

FIG. 3 is a schematic cross-sectional view of an essential part for explaining the action of the scheduled shearing part pressing means.

FIG. 4 is a schematic cross-sectional view of essential parts for explaining a shearing state by a rotary shearing blade.

FIG. 5 is a cross-sectional view illustrating the shape of the sheared end surface of the plate material piece immediately after shearing.

FIG. 6 is a view corresponding to FIG. 1 of a rotary shearing device of a conventional example.

7 is a schematic cross-sectional view of a main part for explaining a shearing state by the apparatus of FIG.

[Explanation of symbols]

(A)… Shearing device (1)… Rotating shaft (2)… Rotating shearing blade (3)… Spacer (4)… Bearing member (5)… Pressing means for shearing part (5a)… Press roll pair (6)… Burr (51)… Press roll body (52)… Roll shaft (P)… Plate material (Z)… Shear area

Claims (3)

[Claims] 1. A method of shearing a plate material to a predetermined width with a pair of rotary shearing blades, wherein a predetermined shear line on the plate material and a region to be sheared including both sides thereof are pressed from the front and back sides of the plate material and compressed. After transforming,
A shearing method comprising shearing along the shear line. 2. A rotating shaft arranged in a pair of upper and lower,
Drive / transmission means for rotating each rotary shaft in a predetermined direction; at least a pair of upper and lower rotary shearing blades that are inserted into the rotary shafts and are fixed at predetermined positions to shear a plate material passing between the rotary shafts; Set in the preceding stage of the rotary shearing blade when viewed from the passing direction of the plate material, arranged vertically through the plate material, and pressing the planned shear line on the plate material including the shear line and both sides thereof from the front and back sides of the plate material. A shearing device comprising a pre-shearing portion pressing means having at least one pair of press rolls that can be deformed by compression. 3. The shearing device according to claim 2, wherein the scheduled shearing portion pressing means is configured to apply a shearing force in a direction substantially opposite to the shearing force applied to the plate material by the pair of rotary shearing blades.