JP7304625B2 - Automatic cutting system for lugs and lugs of steel plates - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic gas cutting system for steel plates, and more particularly to an automatic cutting system for lugs and lug scraps of the steel plates (steel plates to be cut).

As an automatic gas cutting system for steel plates, Patent Document 1 discloses a system provided with three torches. In Patent Document 1, two torches out of three torches are used to simultaneously cut both longitudinal ends of the steel plate to be cut (both edges of the steel plate to be cut). However, since the steel sheet to be cut is misaligned due to the warp of the selvedge during the selvedge cutting, it is necessary to cut the selvedge at a predetermined interval (for example, about 4.5 m) after the selvedge is cut. At present, this cutting of the selvedge is manually performed separately by an operator.

JP-A-4-231175

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic cutting system for lugs and lugs of a steel plate that can automatically cut the lugs and lugs of the steel plate.

According to the present invention, the following 1 to 2 steel plate selvedge and selvedge automatic cutting systems are provided.
1.
a traveling frame disposed above the steel plate to be cut along the width direction of the steel plate to be cut and movable in a direction along the longitudinal direction of the steel plate to be cut (hereinafter referred to as “traveling direction”);
a traversing block movable in a direction along the longitudinal direction of the traveling frame (hereinafter referred to as “traverse direction”);
and a torch unit attached to the traverse block,
The torch unit includes an edge cutting torch for gas cutting the edge of the steel plate to be cut, an edge cutting torch for gas cutting the edge of the steel plate to be cut, and the edge cutting torch in the traveling direction. and a transverse movement mechanism for moving the earwax cutting torch in the transverse direction,
The ear cutting torch and the ear waste cutting torch are movable up and down,
The torch unit is attached to the traversing block via an elevating shaft, and by elevating the elevating shaft, the ear cutting torch and the ear waste cutting torch are raised and lowered in synchronism,
An automatic cutting system for selvedges and selvedges of a steel plate, further comprising a moving block attached to the traversing block so as to be movable in the traveling direction, wherein the elevating shaft is attached to the traversing block via the moving block. .
2.
2. The system for automatically cutting selvedges and selvedges of a steel plate according to 1 above, wherein the transverse movement mechanism can change the speed of movement of the selvedge cutting torch in the transverse direction.

According to the present invention, the selvedge and selvedges of a steel plate can be automatically cut by the selvedge cutting torch and the selvedge cutting torch.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view of an automatic cutting system for lugs and lug shavings of a steel plate, which is one embodiment of the present invention. 1. The principal part of the automatic cutting system of the selvedge and selvedge of the steel plate shown in FIG. 1 is shown, (a) is a top view, (b) is a front view. The top view which shows the cutting|disconnection outline|summary of an ear and ear waste. FIG. 4 is a conceptual diagram showing the relationship between the ear-cutting speed, the ear-was-cutting speed, and the combined ear-was-cutting speed.

FIG. 1 shows an automatic cutting system (hereinafter simply referred to as "automatic cutting system") 100 for selvedges and selvedges of steel plates, which is one embodiment of the present invention.
This automatic cutting system 100 is arranged above the steel plate S to be cut along the width direction of the steel plate S to be cut, and is movable in the direction along the longitudinal direction of the steel plate S to be cut, that is, in the running direction. A portal frame 10 is provided. Specifically, the gate-shaped frame 10 is arranged so as to straddle (construct) the steel plate S to be cut in the width direction, and is movable on the rails R, R in the running direction. A drive mechanism (motor, etc.) for running the portal frame 10 is omitted from the drawing.

Two horizontal blocks 20 are attached to the portal frame 10 . Specifically, each of the two transverse blocks 20 is attached so as to be movable in the direction along the longitudinal direction of the portal frame 10, that is, in the transverse direction. The transverse direction is also the direction along the width direction of the steel plate S to be cut.

A torch unit 50 is attached to each of the two traversing blocks 20 via a moving block 30 and an elevating shaft 40 . The torch unit 50 includes an edge cutting torch 51 for gas cutting the edges of the steel plate S to be cut, and an edge cutting torch 52 for gas cutting the edge chips of the steel plate S to be cut. The selvedge cutting torch 51 and the selvedge cutting torch 52 are movable up and down, and the selvedge cutting torch 52 is movable in both the running direction and the transverse direction.

FIG. 2 shows the main part of the automatic cutting system 100 (torch unit 50 part).
The torch unit 50 includes, in addition to the ear-cutting torch 51 and the ear-was-cutting torch 52, a running-direction moving mechanism 53 for moving the ear-was-cutting torch 52 in the running direction, and the ear-was-cutting torch 52 in the transverse direction. and a transverse movement mechanism 54 that allows the .

The traveling direction moving mechanism 53 includes a holding member 53a that holds the earwax cutting torch 52 and a holding plate 53b that holds the holding member 53a movably in the traveling direction. By moving in the running direction along the holding plate 53b, the earwax cutting torch 52 is moved in the running direction. By moving the earwax cutting torch 52 in the running direction in this manner, the space (distance) in the running direction between the earwax cutting torch 51 and the earwax cutting torch 52 (hereinafter referred to as the "running direction distance between the torches") ) can be adjusted.

The transverse movement mechanism 54 includes a movement member 54a connected to a holding plate 53b, and a holding plate 54b that holds the movement member 54a movably in the transverse direction. By moving in the transverse direction along 54b, the earwax cutting torch 52 is moved in the transverse direction. By moving the earwax cutting torch 52 in the transverse direction in this manner, the earwax can be cut, and the distance between the earwax cutting torch 51 and the earwax cutting torch 52 can be increased in the transverse direction. ) (hereinafter referred to as “traverse direction inter-torch distance”) can be adjusted.

The driving mechanism for moving the earwax cutting torch 52 in the traveling direction and the traversing direction can be various motors such as a stepping motor and an AC servomotor. The drive mechanism for the directional movement is preferably an AC servomotor so that the selvedge cutting speed can be varied smoothly.

In this embodiment, the torch unit 50 further includes an edge sensor 55 for detecting edges of earwax.

The torch unit 50 is attached to the traverse block 20 via the moving block 30 and the lifting shaft 40 as described above. Specifically, the torch unit 50 is fixedly attached to the elevating shaft 40, the elevating shaft 40 is fixedly attached to the moving block 30, and the moving block 30 is attached to the traversing block 20 so as to be movable in the traveling direction. It is

Since the torch unit 50 is fixedly attached to the elevation shaft 40 in this way, the ear cutting torch 51 and the ear waste cutting torch 52 included in the torch unit 50 are synchronized with the elevation operation of the elevation shaft 40. up and down.
Further, since the torch unit 50 is attached to the traversing block 20 via the moving block 30, by moving the moving block 30 in the traveling direction, the ear cutting torch 51 and the ear waste cutting torch 51 included in the torch unit 50 can be adjusted. The position of the torch 52 in the traveling direction can be adjusted.

Next, a method for cutting the edge and edge shavings of the steel plate S to be cut by the automatic cutting system 100 of the present embodiment will be described. FIG. 3 shows an outline of the cutting.

Prior to cutting, the distance D1 between the traveling direction torches is set. This is because if the distance D1 between the torches in the running direction is too short, the product side of the steel sheet S to be cut will be scratched when the selvedge cutting torch 52 cuts the selvedge. That is, the distance D1 between the torches in the running direction is set according to the thickness of the steel sheet S to be cut, etc., from the viewpoint of suppressing flaws on the product side. The distance D1 between the torches in the running direction is set longer as the thickness of the steel plate S to be cut is thicker. Decide in advance.

When starting ear cutting, the ear cutting torch 51 is moved to the ear cutting start position S1. The movement (alignment) of the edge cutting torch 51 to the edge cutting start position S1 can be performed by moving the portal frame 10 and moving the traverse block 20 . It should be noted that the edges of the steel plate S to be cut are often not straight, and the edge cutting start positions S1, S1 on both sides are misaligned in the running direction. In this way, when the edge cutting start positions S1, S1 on both sides are misaligned in the traveling direction, the traveling of the gate-shaped frame 10 and the transverse movement of the traversing block 20 roughly move the edge cutting torch 51 to the edge cutting start position S1. By moving the moving block 30 in the traveling direction after performing such alignment, the edge cutting torch 51 included in the torch unit 50 can be accurately aligned with the edge cutting start position S1.
It should be noted that when starting the edge cutting, the edge cutting torches 51 on both sides do not necessarily have to be accurately aligned with the edge cutting start position S1, and some positional deviation in the traveling direction is allowed. Even if there is some positional deviation in the running direction, the edge cutting can be started by adjusting (shifting) the timing of firing the edge cutting torches 51 on both sides. Therefore, the moving block 30 can be omitted in the automatic cutting system 100 of this embodiment.

After the heating is performed at the edge cutting start position S1, the edge is cut by running the portal frame 10. - 特許庁The edge cutting speed (running speed of the portal frame 10) is set according to the thickness of the steel plate S to be cut. Although the thickness of the steel plate S to be cut may vary in the running direction, it does not affect the edge cutting speed.
On the other hand, if the thickness of the steel plate S to be cut fluctuates in the running direction, the distance between the tip (cradle) of the edge cutting torch 51 and the surface of the steel plate S to be cut fluctuates. May affect ear amputation stability. Therefore, in the present embodiment, a height sensor for detecting the surface height of the steel plate S to be cut is separately provided, and the height of the edge cutting torch 51 is adjusted by the elevation operation of the elevation shaft 40 according to the detection value of this height sensor. You can also adjust the position automatically.

It should be noted that the selvedge cutting torch 52 is retracted, for example, toward the selvedge during the selvedge cutting. This retracting operation is performed by moving the ear waste cutting torch 52 in the transverse direction by means of the transverse movement mechanism 54 .

When the selvedge produced by the selvedge cutting reaches a predetermined length (for example, about 4.5 m), the selvedge is cut. When cutting the selvedge, the distance D2 between the transverse torches at the start of the selvedge cutting (when the selvedge cutting torch 52 is heated) is set. This is because if the distance D2 between the torches in the transverse direction is too short, it becomes difficult to ignite the selvedge cutting torch 52, and the product side of the steel sheet S to be cut is damaged such as gouging. That is, the distance D2 between the torches in the horizontal direction at the start of cutting the selvedge is set according to the thickness of the steel sheet S to be cut, etc., from the viewpoint of easiness of burning and prevention of scratches on the product side. Note that the transverse direction inter-torch distance D2 at the start of edge cutting is set longer as the thickness of the steel plate S to be cut is thicker. A set value is determined in advance by experiment. In addition, when the width of the selvedge is narrow, the warp increases due to the influence of thermal stress. A specific set value of the distance D2 between the torches in the transverse direction according to the thickness of the steel plate S to be cut is determined in advance by experiment.
On the other hand, since the present embodiment has the edge sensor 55, the distance D2 between the torches in the transverse direction at the start of cutting the ear scraps is set according to the edge position of the ear scraps detected by the edge sensor 55. In this way, the ear crumb cutting torch 52 can also be moved in the transverse direction by the transverse movement mechanism 54 .

After the selvedge cutting torch 52 is ignited, the selvedge cutting torch 52 is moved in the transverse direction by the traverse direction moving mechanism 54 to cut the selvedge. The substantial edge cutting speed is, as shown in FIG. However, this selvedge cutting composite speed c gradually accelerates from the start of selvedge cutting. In addition, the speed is gradually decelerated at the end of cutting the selvedge.
In this way, in order to smoothly change the selvedge cutting composite speed c (the selvedge cutting speed b), it is preferable to use an AC servomotor as the driving mechanism of the traverse direction moving mechanism 54 . That is, for example, it is difficult to smoothly change the selvedge cutting speed with a stepping motor, and vibration occurs when the motor is stopped.

Although the combined selvedge cutting speed c shown in FIG. 4 naturally has an upper limit, the selvedge cutting speed a is desired to be as high as possible in order to secure the working efficiency of selvedge cutting. Therefore, in actual work, the upper limit of the selvedge cutting speed b is set in consideration of the upper limit of the combined selvedge cutting speed c.

As described above, according to the automatic cutting system 100 of the present embodiment, the ear waste can be automatically cut by the ear waste cutting torch 52 while cutting the ear with the ear cutting torch 51 . After the selvedge and selvedge are cut, for example, the selvedge cutting torch 51 is used to cut the steel plate S to be cut in the width direction to obtain a product of a predetermined size.

In this embodiment, the torch unit 50 is fixedly attached to the elevating shaft 40 so that the ear cutting torch 51 and the ear waste cutting torch 52 are moved up and down in synchronism. , and the torch 52 for cutting ear crumbs can be moved up and down independently of each other. For example, by attaching parts other than the ear cutting torch 51 in FIG. 2 to separate elevating shafts, the ear cutting torch 51 and the ear waste cutting torch 52 can be moved up and down independently. However, in order to simplify the control system for raising and lowering the cutting torch 51 and the ear waste cutting torch 52, the ear cutting torch 51 and the ear waste cutting torch 52 are moved up and down in synchronism as in the present embodiment. It is preferable to

In addition, in the present embodiment, the portal frame 10 is provided with two transverse blocks 20 (torch units 50), but the number of transverse blocks 20 (torch units 50) may be one. However, it is preferable to provide two traversing blocks 20 (torch units 50) for one steel plate to be cut from the viewpoint of simultaneously cutting the selvedges and selvedges on both sides to improve the cutting efficiency. That is, when the number of steel plates to be cut is one as in the present embodiment, two traversing blocks 20 (torch units 50) may be provided. When the number of steel plates is three, it is preferable to provide six.

100 automatic cutting system 10 portal frame (running frame)
20 Traversing block 30 Moving block 40 Elevating shaft 50 Torch unit 51 Ear cutting torch 52 Ear dust cutting torch 53 Traveling direction moving mechanism 53a Holding member 53b Holding plate 54 Traverse direction moving mechanism 54a Moving member 54b Holding plate 55 Edge sensor S Cover Steel plate to be cut S1 Edge cutting start position R Rail D1 Distance between torches in running direction D2 Distance between torches in transverse direction

Claims (2)

a traveling frame disposed above the steel plate to be cut along the width direction of the steel plate to be cut and movable in a direction along the longitudinal direction of the steel plate to be cut (hereinafter referred to as “traveling direction”);
a traversing block movable in a direction along the longitudinal direction of the traveling frame (hereinafter referred to as “traverse direction”);
and a torch unit attached to the traverse block,
The torch unit includes an edge cutting torch for gas cutting the edge of the steel plate to be cut, an edge cutting torch for gas cutting the edge of the steel plate to be cut, and the edge cutting torch in the traveling direction. and a transverse movement mechanism for moving the earwax cutting torch in the transverse direction,
The ear cutting torch and the ear waste cutting torch are movable up and down,
The torch unit is attached to the traversing block via an elevating shaft, and by elevating the elevating shaft, the ear cutting torch and the ear waste cutting torch are raised and lowered in synchronism,
An automatic cutting system for selvedges and selvedges of a steel plate, further comprising a moving block attached to the traversing block so as to be movable in the traveling direction, wherein the elevating shaft is attached to the traversing block via the moving block. . 2. The system for automatically cutting selvedges and selvedges of a steel plate according to claim 1 , wherein said laterally moving mechanism can change the moving speed of said selvedge cutting torch in the lateral direction.

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