JPH0635056B2 - Butt welding connection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a butt welding connection device, for example, a strip line, in which a trailing end of a leading strip and a leading end of a trailing strip are cut and brought into contact with each other. The present invention relates to a butt welding connection device for welding a laser beam between the two cut portions along the contact line.

[Prior Art] FIGS. 9 to 12 show a conventional butt-welding connection device for strip connection, which is disclosed in, for example, JP-A-57-171590.

In the figure, reference numeral (1) is a base having a predetermined width and length,
(2) is a moving frame that moves on the base (1), and is equipped with a shear device and a welding device. (3) is a cylinder for moving the moving frame (2), which moves the moving frame (2) along the guide (4). (5) is a clamping device for one of the workpieces, for example,
Output side clamp device, (6a) is one of the materials to be welded, for example, a leading strip, (6b) is the other welding material, for example, a trailing strip, (7) is a cylinder for operating the output side clamping device (5),
(8) is the other clamp device, for example, the inlet side clamp device, (9)
Is a cylinder for operating the inlet-side clamp device (8) toward and away from the outlet-side clamp device (5), and (10) is a cylinder for operating the inlet-side clamp device (8).

Also, (11) is a processing head that can irradiate a laser beam, and (1)
2) is a carriage that supports the processing head (11) and is a rail (1
3) Drive over. The rail (13) is attached to the moving frame (2). Reference numeral (14) is a motor for driving the carriage (12), and reference numeral (15) is a transmission device for guiding a laser beam from an oscillator (not shown) to the processing head (11).

A laser beam butt welding device (16), which is a butt welding device, is configured by the members indicated by reference numerals (11) to (15).

Next, (17) is a back bar mounted on the moving frame (2), which is moved up and down by the cylinder (18) to guide (19a), (19b).
Will be guided by.

(20a) is a fixed blade device (20a) attached to the moving frame (2).
It is a movable blade device that cuts the leading and trailing strips (6a) and (6b) in cooperation with b), and is supported by a movable frame (2) so that it can come in contact with and separate from the fixed blade device (20b). That is, along the guides (22a) and (22b) attached to the movable frame (2), the cylinder (2
Go up and down by 1).

On the other hand, the fixed blade device (20a) is guided by guides (24a), (24b) supported by the movable frame (2), and the cylinder (23).
It is configured to be lifted and lowered by.

Incidentally, reference numerals (20a), (20b), (21), (22a), (22b), (23), (24a),
A cutting device (25) is formed by the member shown by (24b).

In the butt welding connection device configured as described above, as shown in FIG. 11, the output side and the input side clamp devices (5) and (8) are arranged in the traveling lines of the strips (6a) and (6b). Is
The cutting device (25) and the back bar device (17) are mounted on a movable frame so that they can be moved to a cutting position and a welding position by a guide (4).

In the steel process line, leading and trailing strips (6a) and (6b) are run in the direction of arrow A in FIG.
When the trailing end of the leading strip (6a) running in this way comes to a predetermined position with respect to the delivery side clamp device (5), the cylinder (7) is driven to cause the delivery side clamp device (5) to move forward. The strip (6a) is clamped. The trailing strip (6b) is fed until the leading end of the trailing strip (6b) is at a predetermined distance from the clamped trailing end of the leading strip (6a), and the trailing strip (6b) is driven by the cylinder (10). The side clamping device (8) operates and the transition strip (6b) is clamped by the entrance side clamping device (8). After clamping both strips (6a), (6b) with both clamp devices (5), (8), the movable blades and fixed blade devices (20a), (20b) are moved to the exit side as shown in FIG. It is arranged between the entry side clamp devices (5) and (8).

In this state, the fixed blade device (20b) is raised by the cylinder (23), and after that, the movable blade device (20a) cooperates with each other, and the rear end of the preceding strip (6a) and the trailing strip (6b). The tip of and is cut at the same time.

When the cutting device (25) finishes operating, the cylinder (3) operates to operate the back bar device (17) and the laser beam butt welding device (16) to the operating position of the line center, and the inlet side clamping device ( The cylinder (9) of 8) operates and advances the trailing strip (6b).

As a result, the trailing end of the leading strip (6a) and the leading end of the trailing strip (6b) come into contact with each other.

When the operation of the entry side clamp (8) is completed, the back bar device (17) is raised by the cylinder (18) to a position where it comes into contact with the leading and trailing strips (6a), (6b).

After that, the abutting portions of the leading and trailing strips (6a) and (6b) are welded by the laser beam emitted from the working head (11).

[Problems to be solved by the invention]

Since the conventional butt welding connection device is configured as described above, the linearity (straightness) of the movable blade and the fixed blade is straight.
It is difficult to secure the same, and therefore the linearity of the cut portion of each strip after cutting cannot be obtained more than the linearity of these movable blades and fixed blades. In particular, in butt welding of thin plates, there is a problem that it is difficult to secure the welding quality of the welded joint if there is a gap between the gear of the butt weld and the running of the processing head with respect to the butt line, and there is also the problem of guillotine type shearing. The device also has a problem that its structure becomes large.

The present invention has been made to solve the above problems, and reduces the butt gear gap of both materials to be welded, and allows the butt welding device to correctly trace and run on the abutted contact line. The purpose is to obtain a butt welding connection device.

[Means for solving problems]

The butt welding connection device according to the present invention forms a cut surface with less deformation by moving and cutting the upper blade and the lower blade in the cutting direction by a rotary shear device that is displaced from each other by a predetermined amount in the cutting direction. Butt welding is performed by moving the abutting line that is abutted on the indoor member that is provided substantially parallel to the cutting line by a butt welding device that is provided in parallel with the carriage equipped with the rotary shear device in the cutting direction. To do.

[Action]

The butt welding connection device according to the present invention is such that the carriage is moved by the rotary shear device mounted on the carriage traveling on the guide member to cut the material to be welded, and the cut surfaces are brought into butt contact with each other, and then the carriage is moved to move. ,
Welding is carried out by a butt welding device mounted on this carriage.

〔Example〕

The present invention will be described below with reference to the drawings showing an embodiment thereof.

1 to 5, the inlet side clamp device (8) and the outlet side clamp device (5) installed on the base (1) are the same as the conventional ones, but the outlet side clamp device is the same. The frame (26) supporting the device (5) has a guide rail as a guide member.
(30) is provided on the guide rail (30) for welding the rotary shear device (27), the cylinder (28) for moving the rotary shear device (27) up and down, and the leading and trailing strips. A butt welding device, for example, a carriage (29) equipped with a laser beam butt welding device (16) runs. (3
1) is the motor that is the drive source.

The rotary shear device (27) is equipped with a traveling and trailing strip (6
The ends of a) and (6b) are arranged so that each end can be cut by a predetermined amount.

The rotary shear device (27) and the laser beam butt welding device (16) are mounted on the same carriage (29) and are configured to be movable on the same guide rail (30).

The rotary shear device according to the present invention takes the following two measures in order to reduce the deformation at the time of cutting.

(1) As shown in FIG. 4, the upper blade (27a) and the lower blade (27b)
They are offset from each other by a predetermined amount in the cutting direction.
That is, as shown in FIG. 6A, the upper blade (27a) and the lower blade (27a)
When the center line of b) and the center line of b) coincide, the cutting edge is greatly deformed. This is because the perspective portion is pushed down as shown in FIG. 6A at the time of cutting, and as a result, as shown in FIG. 6B, a warp (y ₁ ) occurs at the cut edge portion. That is, residual strain is generated in the strip, which is the material to be welded, to be cut due to the bending moment due to the difference in cutting reaction force distribution applied to the upper blade (27a) and the lower blade (27b) during cutting.
If the peripheral strips are clamped and welded in a state where the deformation is large, a step is generated in the height direction between the leading strip and the trailing strip, that is, in the plate thickness (t) direction, and good welding cannot be performed.

When the offset amount of the upper blade (27a) and the lower blade (27b) is set to the optimum value S ₃ as shown in FIG. 8A, the bending moment becomes almost 0, and as shown in FIG. 8B. Deformation amount is almost 0
Becomes

FIG. 7A is a diagram showing a case where an offset amount intermediate between those in FIGS. 6A and 8A is given. According to this, as shown in FIGS. 6B, 7B, and 8B, the deformation amount also differs depending on the offset amount.

(2) When the thin plate is cut by the rotary shear device, the upper blade (27a) and the lower blade (27b) of the rotary shear device are, for example, the upper blade (2
By rotationally driving the shaft supporting 7a) and the lower blade (27b), the shaft is rotationally driven in the cutting direction. Thus, when rotated, cutting waves, so-called wrinkles, do not occur when the strip is cut.

This is self-evident when comparing the case of cutting only by pushing the round blade without rotating and the case of cutting while rotating.

In such a butt welding connection device, as shown in FIG. 1, the inlet and outlet clamp devices (8) and (5) are located on the line center, and the rotary shear device (27) and the laser beam butt welding device ( The carriage (29) equipped with 16) is standing by at a predetermined position (solid line position).

In such a state, when the trailing end of the leading strip (6a) and the line end of the trailing strip (6b) come to predetermined positions, the output side and input side clamping devices (5), (8) operate. As shown in FIG. 3, the leading and trailing strips (6a) and (6b) are clamped by the outlet side and inlet side clamp devices (5) and (8), respectively.

After that, the rotary shear device (2
7) runs in the cross direction with respect to the line by the guide rail (30) and cuts the ends of the leading and trailing strips (6a) and (6b), respectively.

When this cutting operation is completed, the carriage (29) is on standby on the left side of the drawing.

Next, as shown in FIG. 2, the entrance side clamp device (8) is advanced to the trailing strip (6) at the rear end of the preceding strip (6a).
Contact the tip of b).

In this state, the back bar device (17) is raised by the cylinder (18) to support the back, and then the laser beam butt welding device (1
Butt welding is performed by the laser beam emitted from 6). Naturally, the butt welding is performed while moving the carriage (29) to the right side in FIG.

In the above embodiment, the laser beam butt welding device was provided as the butt welding device, but the present invention is not limited to this, and any butt welding device may be used, and a strip butt welding connection device for steel lines will be described as the butt welding connection device. However, this is not limited to the above, and any plate-shaped butt welding connection device for the materials to be welded may be used.

〔The invention's effect〕

As described above, according to the present invention, since the cutting device and the butt welding device are mounted on the same carriage and run on the guide member, the butt welding device correctly traces the contact lines of both materials to be welded. Therefore, no welding deviation occurs, high trace accuracy is obtained, and a stable welded joint is obtained.As a cutting device, the upper blade and the lower blade are arranged with a predetermined amount offset from each other in the cutting direction. In addition, since a rotary shearing device for rotating and driving in the cutting direction is provided, the cutting portion of the material to be welded is deformed, especially a cutting wave that is apt to occur when cutting a thin plate, so-called cutting wrinkle is also generated. As a result, a high-quality welded joint can be obtained in which butting can be performed accurately, there is no discrepancy in the thickness direction, and there is no deformation such as wrinkles in cutting. Has the effect of contact connecting device is obtained.

[Brief description of drawings]

FIG. 1 is a front view of a strip butt connection apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of a processing head portion of a laser beam viewed from a sectional direction taken along line II-II of FIG.
FIG. 3 is a side view of the rotary shearing device section as seen from the sectional direction along line II-II in FIG. 1, FIG. 4 is a cutting state diagram by the rotary shearing device in FIG. 1, FIG. 5 is a welding execution state diagram, 6A, FIG. 7A and FIG. 8A are explanatory views of cutting deformation when cutting is performed by the rotary shear device, and FIG.
Is a cutting state diagram when the amount of offset between the upper blade and the lower blade is 0, FIG. 6B is a perspective view of a modified example of the strip material cut according to FIG. 6A, and FIG. 8A is the optimum offset. FIG. 8B is a perspective view of a modified strip member according to FIG. 8A, and FIG. 7A is a case where an intermediate offset amount between FIGS. 6A and 8A is given. FIG. 7B is a perspective view of a modified strip material according to FIG. 7A, FIG. 8B is a perspective view of a modified strip material according to FIG. 8A, and FIG. FIG. 10 is a side view of a conventional strip butt welding connection device, FIG. 10 is a sectional view showing a state of FIG. 9 at the time of cutting, FIG. 11 is a sectional view showing a state of butt welding of FIG. 9, and FIG. It is a top view of FIG. (5) …… Output side clamp device, (6a) …… Welding material (preceding strip), (6b) …… Welding material (trailing strip),
(8) …… Inlet side clamp device, (16) …… Butt welding device (laser beam butt welding device), (27) …… Cutting device (rotary shear device), (27a) …… Upper blade, (27b)… … Lower blade, (29) …… Carriage, (30) …… Guide member (guide rail).

Claims (4)

[Claims] 1. Butt welding in which welding ends of two plate-shaped materials to be butt-welded are cut, the cut portions are butt-contacted, and then butt-welded and connected along corresponding tangent lines. In the connection device, a guide member provided substantially parallel to the contact line, a carriage guided and moved by the guide member, and the welding end cutting provided in the carriage in parallel in the moving direction. A rotary shear device for use and a butt welding device for welding between the cutting ends along the contact line, and the upper blade and the lower blade of the rotary device are arranged so as to be displaced from each other by a predetermined amount in the cutting direction. Butt welding connection device. 2. The butt joint according to claim 1, wherein the two materials to be welded are leading and trailing strips, and the butt welding connection device is a strip butt welding connection device for strip connection in a strip line. Welding connection device. 3. The butt welding connection device according to claim 1, wherein the butt welding device is a laser beam butt welding device. 4. The butt welding connection device according to any one of claims 1 to 3, wherein the upper blade and the lower blade of the rotary shearing device are rotationally driven in the cutting direction.