JP2612486B2 - Remove side notching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a production line for continuously processing a material to be welded, such as a steel strip, on a delivery side of a welding device for mutually welding these steel strips. The present invention relates to a side notching device that is installed and cuts and removes both side ends of a welding line.

[Conventional technology]

FIG. 3 shows a conventional side notching apparatus of this kind disclosed in, for example, JP-A-56-11114, which is shown together with a flash welding apparatus disclosed in, for example, Japanese Patent Publication No. 57-56432. In the drawing, (1) is a flash welding device, which sequentially runs from left to right in the drawing, that is, from the entry side to the exit side, and sequentially welds the ends of the steel strip (2) to be processed. Things. The flash welding apparatus (1) clamps both ends of the steel strip (2) and a pair of rotary shear units (3) for cutting both ends of the steel strip (2) prior to welding. An electrode side (4) and an electrode side (5) are provided to press the both end surfaces together and to apply a welding current at the same time. However, since they are not the main subject of the present invention, their detailed description is omitted. . (2a) is a portion already welded by the flash welding device (1), that is, a welding line.

Next, (6) is a side notching device provided on the exit side of the flash welding device (1). Hereinafter, this is combined with FIG. 4 which is a side view of the device, that is, a diagram viewed from the traveling direction of the steel strip (2). The configuration will be described. In the figure, (7) is a frame having an opening (7a) through which the steel strip (2) passes, (8)
Is a notching head configured to be movable in a direction perpendicular to the traveling direction of the steel strip (2) by wheels (9), and (10) is driven up and down by a cylinder (11) attached to the notching head (8). The upper knife (12) is a lower die for cutting the steel strip (2) in combination with the upper knife (10), and (13) is a cylinder for driving the notching head (8). In addition, upper knife (10) and lower die (12)
And constitute a cutting mechanism. The center (14) is a steel strip (2) for detecting the welding position in the process after welding.
A punching device for providing a hole of a predetermined diameter in the center of
It comprises a punch (15) and a die (16), and a piston (17) for driving the punch (15) up and down.

Next, the operation, particularly the operation centering on the side notching step after the welding step and the step of verifying the welding quality will be described. When the welding by the flash welding device (1) is completed, the steel strip (2) is fed from the entry side to the exit side by a line feed device (not shown), and the welding line (2a) reaches the side notching device (6). By the way, stop temporarily. Here, by operating the cylinder (13), the notching head (8) is set at a predetermined position corresponding to the width dimension of the steel strip (2) at the welding line (2a). Next, by operating the cylinder (11), the upper knife (10) is lowered and the lower die (12) is used to hold both ends of the welding line (2a) of the steel strip (2) as shown in FIG. A so-called side notching is performed for cutting and removing over a region (2b) having a radius (usually about 200 mm). The side notching is performed
This is performed for preventing the fracture of the welded portion, and particularly for moving the blade in the width direction of the side trimmer device (which cuts off the degraded portions at both ends of the steel strip) when the steel strips having different width dimensions are welded.

After this side notching step, the welding quality of the welding line (2a) is verified. First, a visual inspection is performed by an operator, and if the result is good, the steel strip (2) is sent to the exit side. If the quality cannot be confirmed only by visual inspection, the welding line (2a) is returned to the position of the flash welding device (1) and the welding line (2a) of the steel strip (2) is rotated using the rotary shear unit (3). Cut out a test piece (2c) of specified dimensions from the part containing ()). Then, as shown in FIG. 6, using a separate bulge tester, a punch having a spherical surface with a specified radius R is pressed against the weld line (2a) of the test piece (2c) and squeezed. And the quality of welding is verified by the fracture mode. If the result is good, re-weld the specimen (2c).

[Problems to be solved by the invention]

The configuration of the conventional side notching device or the method of verifying the welding quality of the welding line is as described above. At the time of side notching, only visual inspection can be performed. If the visual inspection cannot determine the welding line (2a), It is necessary to return to the position of the flash welding device (1), cut out the test piece (2c), and separately perform a bulge test with a tester, which causes a significant downtime on the production line and reduces production efficiency. There was a problem.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a side notching device that can perform a bulge test at the same time as side notching and does not require re-welding after the bulge test. And

[Means and actions for solving the problem]

The side notching device according to the present invention is provided with a pressing mechanism that presses the vicinity of both ends in the width direction of the welding line from the front and back with a punch and a die of a predetermined shape, thereby forming a squeezing deformation required for a bulge test. After the bulge test performed by observing the squeezing deformation caused by the pressing mechanism, the cutting mechanism cuts and removes the material to be welded over the region including the squeezed deformation portion on the welding line generated in the test.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view (A) and a side view (B) showing one of a pair of notching heads (8) of the entire apparatus. In the figure, (9) to (12) are equivalent to the conventional case. (19) is a pressing mechanism installed on the notching head (8), which is a punch (20) for forming a squeezing deformation required for a bulge test, and a cylinder (21) and a die (22) for driving the same up and down. And is mounted close to the entry side of a cutting mechanism including an upper knife (10) for side notching and a lower die (12). The punch (20) and the like are of course set to the shape and size specified by the bulge test method.

Next, the operation will be described. After welding by the flash welding device (1), first, the welding quality of the welding line (2a) is verified. As before, this is first performed visually by the operator, but if it cannot be determined, the cylinder (21) is operated when the welding line (2a) matches the position of the pressing mechanism (19). Then, a squeezing deformation defined by the bulge test punch (20) and the die (22) is generated. A mark (23) indicated by a dotted line in FIG. 2 indicates this squeezed deformed portion. Then, the operator judges the welding quality from the form of breakage of the welding line (2a) due to the squeezing deformation, and if it is good, further advances the steel strip (2), and aligns the welding line (2a) with the cutting mechanism. After operating the cylinder (11), operate the upper knife (10) and lower die (12)
Then, predetermined regions (2b) at both ends of the welding line (2a) are cut and removed as shown by the solid line in FIG. In this case, each of the upper knives (2) is moved relative to the traveling steel strip (2) so that the squeezing deformed portion (23) based on the pressing mechanism (19) is included in the area (2b) cut and removed by the cutting mechanism. 10) The lower die (12), punch (20), and die (22) are mounted and adjusted, so the squeezed part (23) is automatically removed in the side notching process, and the line is smooth. Proceed to

When it is determined that the welding line (2a) is defective, the welding line (2a) is returned to the position of the flash welding device (1), and re-welding is performed.

In the above embodiment, the cylinder (11) for the cutting mechanism is used.
A cylinder for the pressing mechanism (21) is provided separately from the above, but a common cylinder is provided, and a drive selection mechanism for selecting the connection between the upper knife (10) and the punch (20) is provided. May be used to drive both devices.

Further, in the above embodiment, the case of the production line using the flash welding device (1) has been described. However, if the production line requires the side notching and the bulge test, the production line may use a welding device of another type. It can be applied similarly and has the same effect as above.

[Effects of the Invention] As described above, in the present invention, the pressing mechanism is attached to the side notching device, and after the bulge test performed by observing the squeezing deformation formed by the pressing mechanism, by the cutting mechanism,
As the material to be welded was cut and removed over the area including the squeezed deformation part on the weld line generated in the above test,
The bulge test can be easily performed without stopping the production line, and the squeezed deformed portion based on the test is simultaneously removed in the subsequent side notching step, so that the production efficiency is greatly improved.

[Brief description of the drawings]

1 (A) and 1 (B) are a front view and a side view showing an essential part in one embodiment of the present invention, and FIG. 2 is a view for explaining a situation of a bulge test and side notching in that case, FIG. FIG. 4 is a front sectional view and a side view showing a conventional side notching device installed on the exit side of the flash welding device, respectively. FIGS. 5 and 6 show the situation of the side notching and bulge test in the conventional case, respectively. FIG. In the figure, (2) is a steel strip as a material to be welded, (2a) is a welding line, (2b) is a region cut and removed by side notching, (6) is a side notching device, (19) is a pressing mechanism, (20) and (22) are punches and dies for a bulge test, respectively, and (23) is a squeezed deformation part. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] 1. A welding device for welding the ends of a strip-shaped material to be welded running in a longitudinal direction to each other along a width direction, wherein both ends in the width direction of a welding line formed by the welding are provided. In a side notching apparatus provided with a cutting mechanism for cutting and removing over a predetermined area, an area near both ends in a width direction of the welding line and cut and removed by the cutting mechanism prior to cutting and removing at the welding line by the cutting mechanism. A side notching device, comprising: a pressing mechanism for forming a necessary deformation for a bulge test by pressing an inner portion with a punch and a die having a predetermined shape from the front and back.