JP2021030272A - Automatic cutting system of edge and edge debris of steel plate - Google Patents

Abstract

To provide an automatic cutting system of edges and edge debris of a steel plate which can automatically cut the edges and edge debris of a steel plate.SOLUTION: An automatic cutting system 100 is provided that comprises: a traveling frame 10 arranged above a cutting object steel plate S to follow the width direction of the cutting object steel plate S, and being movable in the direction (hereinafter called as "traveling direction") following a longitudinal direction of the cutting object steel plate; a traversing block 20 being movable in the direction (hereinafter called as "traversing direction") conforming the longitudinal direction of the traveling frame 10; and a torch unit 50 mounted to the traversing block 20. The torch unit 50 comprises: an edge-cutting torch 51 performing the gas cutting of edges of the cutting object steel plate; an edge debris-cutting torch 52 performing the gas cutting of edge debris of the cutting object steel plate; a traveling direction movement mechanism moving the edge debris-cutting torch 52 in the traveling direction; and a traversing direction movement mechanism for moving the edge debris-cutting torch 52 in the traversing direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to an automatic gas cutting system for a steel sheet, particularly an automatic cutting system for ears and ear scraps of the steel sheet (steel to be cut).

Patent Document 1 discloses a steel sheet automatic gas cutting system including three torches. In Patent Document 1, two of the three torch are used to cut both ends of the steel sheet to be cut in the longitudinal direction (both ears of the steel sheet to be cut) at the same time. However, during the ear cutting, the steel plate to be cut is displaced due to the warp of the ear dust. Therefore, after the ear cutting, it is necessary to cut the ear dust at a predetermined interval (for example, about 4.5 m). At present, this eardust cutting is performed manually by an operator.

Japanese Unexamined Patent Publication No. 4-231175

An object to be solved by the present invention is to provide an automatic cutting system for steel sheet ears and eardust, which can automatically cut steel sheet ears and eardust.

According to the present invention, there is provided an automatic cutting system for ears and eardust of the following 1 to 4 steel plates.
1. 1.
A traveling frame that is placed above the steel plate to be cut so as to be along the width direction of the steel plate to be cut and can be moved in a direction along the longitudinal direction of the steel plate to be cut (hereinafter referred to as "traveling direction").
A traverse block that can move in a direction along the longitudinal direction of the traveling frame (hereinafter referred to as "traverse direction"), and
It is equipped with a torch unit attached to the traversing block.
The torch unit runs through an ear cutting torch for gas cutting the ear of the steel plate to be cut, an ear waste cutting torch for gas cutting the ear waste of the steel plate to be cut, and the ear waste cutting torch. Includes a traveling direction moving mechanism for moving the ear waste cutting torch and a traversing direction moving mechanism for moving the eardust cutting torch in the transverse direction.
The ear cutting torch and the ear debris cutting torch are an automatic cutting system for steel plate ears and ear debris that can be raised and lowered.
2.
The torch unit is attached to the traversing block via an elevating shaft, and by raising and lowering the elevating shaft, the ear cutting torch and the ear debris cutting torch move up and down in synchronization with the above 1. Automatic cutting system for steel plate ears and torches.
3. 3.
2. The ears and ears of a steel plate according to 2, wherein a moving block is further provided so as to be movable in the traveling direction with respect to the traversing block, and the elevating shaft is attached to the traversing block via the moving block. Automatic scrap cutting system.
4.
The automatic cutting system for ear and ear dust of a steel plate according to any one of 1 to 3 above, wherein the traversing direction moving mechanism can change the moving speed of the ear dust cutting torch in the traversing direction.

According to the present invention, the ear and ear debris of the steel plate can be automatically cut by the ear cutting torch and the ear debris cutting torch.

The schematic plan view of the automatic cutting system of the ear and the ear waste of the steel plate which is one Embodiment of this invention. The main parts of the automatic cutting system for the ears and ear scraps of the steel plate shown in FIG. 1 are shown, (a) is a plan view, and (b) is a front view. The plan view which shows the cutting outline of the ear and the ear waste. The conceptual diagram which shows the relationship between the ear cutting speed, the ear waste cutting speed, and the ear waste cutting combined speed.

FIG. 1 shows an automatic cutting system (hereinafter, simply referred to as “automatic cutting system”) 100 for ears and ear scraps of a steel plate, which is an embodiment of the present invention.
The automatic cutting system 100 is arranged above the steel plate S to be cut so as to be along the width direction of the steel plate S to be cut, and is a traveling frame that can move in the direction along the longitudinal direction of the steel plate S to be cut, that is, in the traveling direction. It is provided with a gate-shaped frame 10. Specifically, the gate-shaped frame 10 is arranged so as to straddle (install) the width direction of the steel plate S to be cut, and can move on the rails R and R in the traveling direction. The drive mechanism (motor or the like) for running the gantry frame 10 is not shown.

Two traversing blocks 20 are attached to the gantry frame 10. Specifically, each of the two traversing blocks 20 is movably attached in a direction along the longitudinal direction of the portal frame 10, that is, in the traversing direction. The transverse direction is also a direction along the width direction of the steel sheet 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, respectively. The torch unit 50 includes an ear cutting torch 51 for gas cutting the ear of the steel plate S to be cut, and an ear waste cutting torch 52 for gas cutting the ear waste of the steel plate to be cut. The ear cutting torch 51 and the ear dust cutting torch 52 can be raised and lowered, and the ear cutting torch 52 can be moved in both the traveling direction and the transverse direction.

FIG. 2 shows a main part (torch unit 50 part) of the automatic cutting system 100.
In the torch unit 50, in addition to the ear cutting torch 51 and the ear waste cutting torch 52, the traveling direction moving mechanism 53 for moving the ear dust cutting torch 52 in the traveling direction and the ear waste cutting torch 52 are moved in the transverse direction. Includes a traverse direction moving mechanism 54 for causing the torch.

The traveling direction moving mechanism 53 includes a holding member 53a for holding the eardust cutting torch 52 and a holding plate 53b for holding the holding member 53a so as to be movable in the traveling direction. By moving in the traveling direction along the holding plate 53b, the eardust cutting torch 52 is moved in the traveling direction. By moving the ear waste cutting torch 52 in the traveling direction in this way, the distance (distance) in the traveling direction between the ear cutting torch 51 and the ear waste cutting torch 52 (hereinafter, "distance between torches in the traveling direction"). ".) Can be adjusted.

The transverse direction moving mechanism 54 includes a moving member 54a connected to the holding plate 53b and a holding plate 54b for holding the moving member 54a so as to be movable in the transverse direction, and the moving member 54a is held by a driving mechanism (not shown). By moving in the transverse direction along 54b, the eardust cutting torch 52 is moved in the transverse direction. By moving the ear dust cutting torch 52 in the transverse direction in this way, the ear dust can be cut, and the distance (distance) in the transverse direction between the ear cutting torch 51 and the ear dust cutting torch 52. ) (Hereinafter referred to as "distance between traversing torches") can be adjusted.

The drive mechanism for moving the eardust cutting torch 52 in the traveling direction and the traversing direction can be various motors such as a stepping motor and an AC servomotor. In particular, the eardust cutting torch 52 is traversed. The drive mechanism for moving in the direction is preferably an AC servomotor so that the eardust cutting speed can be smoothly changed.

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

As described above, the torch unit 50 is attached to the traverse block 20 via the moving block 30 and the elevating shaft 40. 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 movably attached to the traverse block 20 in the traveling direction. Has been done.

Since the torch unit 50 is fixedly attached to the elevating shaft 40 in this way, the ear cutting torch 51 and the ear debris cutting torch 52 included in the torch unit 50 are synchronized with the elevating operation of the elevating shaft 40. To go 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 torch 51 for cutting the ear and the torch for cutting the ear waste included in the torch unit 50 are used. The position of the torch 52 in the traveling direction can be adjusted.

Next, a method of cutting the ears and ear scraps of the steel sheet 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 torches in the traveling direction is set. This is because if the distance D1 between the torches in the traveling direction is too short, a defect occurs on the product side of the steel plate S to be cut due to gouging or the like when cutting the ear dust with the ear dust cutting torch 52. That is, the distance D1 between the torches in the traveling direction is set according to the thickness of the steel plate S to be cut and the like from the viewpoint of suppressing defects on the product side. The traveling direction torch distance D1 is set longer as the thickness of the steel plate S to be cut is thicker, but the specific set value of the traveling direction torch distance D1 according to the plate thickness of the steel plate S to be cut is determined by an experiment. Determine in advance.

To start ear cutting, the ear cutting torch 51 is moved to the ear cutting start position S1. The movement (alignment) of the ear cutting torch 51 to the ear cutting start position S1 can be performed by traveling the portal frame 10 and traversing the traversing block 20. The ends of the steel sheet S to be cut are often not straight, and the ear cutting start positions S1 and S1 on both sides are displaced in the traveling direction. When the ear cutting start positions S1 and S1 on both sides are misaligned in the traveling direction in this way, the ear cutting start position S1 of the ear cutting torch 51 is roughly moved by the traveling of the portal frame 10 and the traversing of the traversing block 20. By moving the moving block 30 in the traveling direction after performing proper alignment, the ear cutting torch 51 included in the torch unit 50 can be accurately aligned with the ear cutting start position S1.
In starting the ear cutting, the ear cutting torches 51 on both sides do not necessarily have to be accurately aligned with the ear cutting start position S1, and some misalignment in the traveling direction is allowed. Even if there is a slight misalignment in the traveling direction, ear cutting can be started by adjusting (shifting) the firing timing of the ear cutting torches 51 on both sides. Therefore, in the automatic cutting system 100 of the present embodiment, the moving block 30 can be omitted.

After burning at the ear cutting start position S1, the ear is cut by running the portal frame 10. The ear cutting speed (running speed of the portal frame 10) is set according to the thickness of the steel plate S to be cut. The thickness of the steel sheet S to be cut may fluctuate in the traveling direction, but it does not affect the ear cutting speed.
On the other hand, if the thickness of the steel plate S to be cut fluctuates in the traveling direction, the distance between the tip (crater) of the torch 51 for ear cutting and the surface of the steel plate S to be cut fluctuates. May affect the stability of the ear amputation. 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 ear cutting torch 51 is raised by the elevating operation of the elevating shaft 40 according to the detected value of the height sensor. The position can also be adjusted automatically.

During ear cutting, the eardust cutting torch 52 is retracted to, for example, the ear side. This evacuation operation is performed by moving the eardust cutting torch 52 in the transverse direction by the transverse direction moving mechanism 54.

When the ear dust generated by the ear cutting reaches a predetermined length (for example, about 4.5 m), the ear dust cutting is performed. When cutting the ear dust, the distance D2 between the torches in the transverse direction at the start of cutting the ear dust (when the torch 52 for cutting the ear dust is burned) is set. This is because if the distance D2 between the torches in the transverse direction is too short, it becomes difficult to burn the torch 52 for cutting eardust, and the product side of the steel plate S to be cut is scratched or otherwise scratched. That is, the distance D2 between the torches in the transverse direction at the start of cutting the eardust is set according to the thickness of the steel plate S to be cut from the viewpoint of ease of burning and suppression of flaws on the product side. The transverse torch distance D2 at the start of cutting eardust is set longer as the thickness of the steel plate S to be cut is thicker, but the specific distance D2 between the torch in the transverse direction according to the thickness of the steel plate S to be cut is set. The set value is determined in advance by experiment. Further, when the width of the ear dust is narrow, the warp becomes large due to the influence of thermal stress, and when the ear dust warps outward, it becomes difficult to burn. The specific set value of the transverse torch distance D2 according to the plate thickness of the steel plate S to be cut is determined in advance by an experiment.
On the other hand, since the edge sensor 55 is provided in the present embodiment, the traverse direction distance D2 at the start of cutting the ear dust is set according to the edge position of the ear dust detected by the edge sensor 55, and the set value and the set value are set. Therefore, the eardust cutting torch 52 can be moved in the transverse direction by the transverse direction moving mechanism 54.

After burning the eardust cutting torch 52, the eardust cutting torch 52 is moved in the transverse direction by the transverse direction moving mechanism 54 to cut the eardust. As shown in FIG. 4, the actual ear cutting speed is the combined speed c of the ear cutting speed (running speed of the portal frame 10) a and the ear waste cutting speed (traverse speed by the traverse direction moving mechanism 54) b. However, this combined eardust cutting speed c gradually accelerates from the start of eardust cutting. In addition, the speed is gradually reduced when the cutting of eardust is completed.
In this way, in order to enable the combined eardust cutting speed c (eardust cutting speed b) to be smoothly changed, it is preferable that the drive mechanism of the transverse movement mechanism 54 is an AC servomotor. That is, for example, in a stepping motor, it is difficult to smoothly change the cutting speed of eardust, and vibration occurs when stopped, and this vibration may cause a flaw on the product side of the steel sheet S to be cut.

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

As described above, according to the automatic cutting system 100 of the present embodiment, the ear debris can be automatically cut by the ear debris cutting torch 52 while the ear is cut by the ear cutting torch 51. After cutting the ears and ear scraps, the steel plate S to be cut can be cut in the width direction using, for example, an ear cutting torch 51 to obtain a product having a predetermined size.

In the present 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 synchronization with each other. And the torch 52 for cutting eardust can be raised and lowered independently. For example, by attaching a portion other than the ear cutting torch 51 in FIG. 2 to a separate lifting shaft, the ear cutting torch 51 and the ear waste cutting torch 52 can be raised and lowered independently. However, from the viewpoint of simplifying 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 synchronization as in the present embodiment. Is preferable.

Further, in the present embodiment, the portal frame 10 is provided with two traversing blocks 20 (torch units 50), but the number of traversing blocks 20 (torch units 50) may be one. However, it is preferable to provide two traverse blocks 20 (torch unit 50) per steel plate to be cut from the viewpoint of simultaneously cutting the ears and ear scraps on both sides to improve the cutting efficiency. That is, when there is one steel plate to be cut as in the present embodiment, two traverse blocks 20 (torch unit 50) may be provided, but when there are two steel plates to be cut, four may be provided. When there are three steel plates, it is preferable to provide six.

100 automatic cutting system 10 gate type frame (running frame)
20 Traverse block 30 Moving block 40 Elevating shaft 50 Torch unit 51 Torch for cutting ears 52 Torch for cutting ear scraps 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 Cut steel plate S1 Ear cutting start position R Rail D1 Travel direction distance between torches D2 Traverse direction Distance between torches

Claims (4)

A traveling frame that is placed above the steel plate to be cut so as to be along the width direction of the steel plate to be cut and can be moved in a direction along the longitudinal direction of the steel plate to be cut (hereinafter referred to as "traveling direction").
A traverse block that can move in a direction along the longitudinal direction of the traveling frame (hereinafter referred to as "traverse direction"), and
It is equipped with a torch unit attached to the traversing block.
The torch unit runs through an ear cutting torch for gas cutting the ear of the steel plate to be cut, an ear waste cutting torch for gas cutting the ear waste of the steel plate to be cut, and the ear waste cutting torch. Includes a traveling direction moving mechanism for moving the ear waste cutting torch and a traversing direction moving mechanism for moving the eardust cutting torch in the transverse direction.
The ear cutting torch and the ear debris cutting torch are an automatic cutting system for steel plate ears and ear debris that can be raised and lowered. The torch unit is attached to the traversing block via an elevating shaft, and by raising and lowering the elevating shaft, the ear cutting torch and the ear waste cutting torch move up and down in synchronization with each other. An automatic cutting system for the described steel plate ears and ear debris. The ear of a steel plate according to claim 2, further comprising a moving block that is movably attached to the traversing block in the traveling direction, and the elevating shaft is attached to the traversing block via the moving block. Automatic cutting system for eardust. The automatic cutting system for ear and ear dust of a steel plate according to any one of claims 1 to 3, wherein the traversing direction moving mechanism can change the moving speed of the ear dust cutting torch in the traversing direction. ..

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