JPH0451272B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a strip connecting device for welding the rear end of a leading strip and the leading end of a trailing strip using a laser beam.

[Conventional technology]

7 to 11 show a conventional strip connecting device disclosed in, for example, Japanese Patent Laid-Open No. 171590/1983. Reference numeral 1 denotes a base having a predetermined width and length, and 2 a moving frame that moves on the base 1, on which a shearing device and a welding device are mounted. 3 is a cylinder for moving the movable frame 2, which moves the movable frame 2 along the guide 4. 5 is an exit clamp device, 6a is a leading strip, 6b is a trailing strip, 7 is a cylinder for operating the exit clamp device 5, 8 is an entry clamp device, and 9 is a link between the entry clamp device 8 and the exit clamp device 5. 10 is a cylinder that operates the entry side clamp device 8. 11
12 is a processing head capable of irradiating a laser beam, and 12 is a carriage supporting the processing head 11, which runs on a rail 13. Note that the rail 13 is attached to the moving frame 2. 14 is a motor that drives the carriage 12. 15 is an oscillator (not shown)
This is a transmission device that guides the laser beam from the processing head 11 to the processing head 11. Incidentally, laser beam welding device 16 is configured by 11 to 15. Reference numeral 17 denotes a welding back bar attached to the moving frame 2, which is raised and lowered by a cylinder 18 and guided by guides 19a and 19b. Reference numeral 20a denotes a movable blade device that cuts the strip 6 in cooperation with a fixed blade device 20b attached to the movable frame 2, and is supported by the movable frame 2 so as to be able to come into contact with and separate from the fixed blade device 20b. That is, the cylinder 21 moves up and down along guides 22a and 22b attached to the movable frame 2. On the other hand, fixed blade device 20b
is guided by guides 24a and 24b supported by the movable frame 2, and is moved up and down by a cylinder 23. In addition, 20a, 20b, 2
A cutting device 25 is formed by 1, 22a, 22b, 23, 24a, and 24b.

As shown in FIG. 9, the strip connecting device constructed as described above has clamp devices 5 and 8 arranged in the running line of the strips 6a and 6b, and a cutting device 25 and a back bar device 17 mounted on a movable frame. It is possible to move between a cutting position and a welding position on rails 4.

In the steel process line, strips 6a and 6b are run in the direction of arrow A in FIG. When the rear end of the leading strip 6a traveling in this manner reaches a predetermined position with respect to the outlet clamp 5, the cylinder 7 is driven and the leading strip 6a is clamped by the outlet clamping device 5. The trailing strip 6b is fed until the tip of the trailing strip 6b reaches a predetermined distance from the rear end of the clamped leading strip 6a, and the input side clamping device 8 is operated by the drive of the cylinder 10. The trailing strip 6b is clamped by an entry clamping device 8. After both stops 6a, 6b are clamped by both clamping devices 5, 8, each blade device 20a, 20b is placed between both clamping devices 5, 8 as shown in FIG. In this state, the fixed blade device 20b is raised by the cylinder 23,
Thereafter, the rear end of the leading strip 6a and the leading end of the trailing strip 6b are simultaneously cut by the movable blade device 20a. When the cutting device 25 completes its operation, the cylinder 3 operates to move the back bar device 17 and welding device 16 to the operating position of the line center, and the cylinder 9 of the entry side clamp device 8 operates to move the trailing strip 6b. advance. As a result, the rear 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 cylinder 18 raises the bathock bar device 17 to a position where it comes into contact with both the strips 6a, 6b. Thereafter, the abutting portions of both strips 6a and 6b are welded with a laser beam irradiated from the processing head 11.

[Problem that the invention seeks to solve]

Since the conventional strip connecting device is constructed as described above, the quality of the connecting portion is influenced by the shape of the connecting portion, that is, the welding portion before welding. In general, as shown in Figure 10, when plates are cut using a cutting device with a fixed blade and a movable blade, minute gaps occur in the thickness direction due to sagging, burrs, etc. There was a problem in that it was difficult to improve the welding quality of the joints.

This invention was made in order to solve the above-mentioned problems, and its purpose is to provide a strip connecting device that improves the quality of the connecting part by improving the quality of the abutting part of both strips. shall be.

[Means for solving problems]

The strip connecting device according to the present invention movably supports the carriage with a guide rail arranged substantially parallel to the line of contact between the leading and trailing strips,
A rotary shear, a finishing device, and a welding device are mounted on a carriage, and as the carriage travels in one direction, the rotary shear operates, and then as it travels in the same direction, the finishing device operates and the end face cut by the rotary shear is activated. The strips are finished and welded between the two strips as the carriage moves in the other direction.

[Effect]

In the strip connecting device of this invention, the end faces of both strips are cut by a rotary shear while the carriage runs in one direction along a guide rail, the cut ends are finished by a finishing device, and the carriage runs in the opposite direction. During this process, a welding device welds the two strips together.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 6, the entrance clamp 8 and the exit clamp device 5 installed on the base 1 are similar to the conventional ones, but the frame 26 supporting the exit clamp device 5 is A guide rail 30 is attached. A carriage 2 equipped with a rotary shear device 27 on this guide rail 30, a cylinder 28 for raising and lowering the rotary shear device 27, finishing devices 32 and 33 for cutting and cutting the cut end surface, and a welding device 16 for welding.
9 is configured to run. Its driving source is a motor 31. The rotary shear device 27 and the cutting device 32 are arranged so as to cut and cut the ends of both the slips 6a and 6b by a predetermined amount, respectively. The rotary shear device 27, cutting device 32, and welding device 16 are mounted on the same carriage 29 and are configured to be movable on the same rail 30.

In such a strip connecting device, as shown in FIG.
3 and the welding device 16 are waiting at predetermined positions (solid line positions). In this state, when the tips of the leading strip 6a and the trailing strip 6b come to predetermined positions, the clamp devices 5 and 8 are activated and the third
As shown, both strips 6a, 6b are clamped by clamping devices 5, 8, respectively. Thereafter, the rotary shear device 33 runs crosswise to the line and cuts the ends of both strips 6a, 6b. During this cutting process, the cut end surface is finished by the device 3.
2 and 33 operate to finish the cut end face with a predetermined accuracy. When this operation is completed, the carriage 2
9 is waiting on the left side of the figure. Next, as shown in FIG. 2, the entry side clamp 8 moves forward to bring the rear end of the leading strip 6a into contact with the leading end of the trailing strip 6b. In this state, the back bar device 17 is raised by the cylinder 18 and welded by the laser beam irradiated from the welding device 16. Welding is performed while the carriage 29 moves to the right.

In the above embodiment, the case where the cut surface of the strip was cut with a cutting member was explained, but the same effect as in the above embodiment can be expected even if the cut surface is ground with a cutting member.

〔Effect of the invention〕

As described above, according to the present invention, (1) after cutting the strip, cutting the cut end surface;
Since processing corrections such as grinding are performed, sag and burrs peculiar to cutting are eliminated, and a highly accurate butt condition (no butt gap) can be formed, resulting in high quality welded joints that do not burn through. can get.

(2) Since the cutting device, the cutting device, and the welding device are mounted on the same carriage and run on the same guide, the strip welding device traces the strip, resulting in a stable welded joint that does not cause weld misalignment.

[Brief explanation of the drawing]

FIG. 1 is a front view of a strip connecting device according to an embodiment of the present invention, FIG. 2 is a side view of the processing head of the laser beam seen from the cross-sectional direction of FIG. 1, and FIG. A side view of the rotary shear device section seen from the cross-sectional direction, FIG. 4 is a diagram showing the state of cutting by the rotary shear device, FIG. 5 is a diagram showing the finished state showing the state of processing correction, FIG. Side view of conventional strip connection device, No. 8
9 is a cross-sectional view showing a welded state, FIG. 10 is an enlarged butted view of the cut surfaces of the strip, and FIG. 11 is an explanatory view showing the state of the groove. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. The rear end of the leading strip and the tip of the trailing strip are cut with a rotary shear, each cut surface of both strips is processed and finished with a finishing device, and the cut surfaces are brought into contact. In the strip welding device, a carriage is movably supported by a guide rail arranged approximately parallel to the contact line, and the rotary shaft is attached to the carriage. and the above-mentioned finishing device and the above-mentioned welding device, the rotary shear operates to cut each end face of the strip as the carriage travels in one direction, and the A finishing device is operated to finish each end face of the strip cut by the rotary shear,
The strip connection is characterized in that the welding device operates to weld the two strips together while the carriage travels in a direction opposite to one direction in which the rotary shear and finishing device operate. Device. 2. The strip connecting device according to claim 1, wherein the welding device is a laser beam welding device. 3. The strip connecting device according to claim 1 or 2, wherein the finishing device is a cutting device. 4. The strip connecting device according to claim 1 or 2, wherein the finishing device is a grinding device. 5. The strip connecting device according to claim 1 or 2, wherein the finishing device is a cutting tool.