JP2010201488A - Butt joining apparatus for beltlike metal sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and correctly perform a butting operation between the termination of a preceding beltlike metal sheet and the start end of a succeeding beltlike metal sheet even in wide beltlike metal sheets. <P>SOLUTION: A butt joining apparatus for beltlike metal sheets includes: a cabinet body 1 provided with a table 2 for work to be mounted with the preceding beltlike metal sheet W1 and the succeeding beltlike metal sheet W2; an upper clamp 4 holding the upper face of the termination part of the preceding beltlike metal sheet W1 and the upper face of the start end part of the succeeding beltlike metal sheet W2; a lower fixture 5 holding and fixing the vicinity of the butted parts of the preceding beltlike metal sheet W1 and the succeeding beltlike metal sheet W2 with the upper clamp 4; a center plate 6 performing the positioning of both beltlike metal sheets W1, W2; and welding equipment 8 butt-welding the butted parts of both beltlike metal sheets W1, W2. In the butt joining apparatus, the lower fixture 5 is provided with a workpiece clamp 7 holding and fixing the termination part of the preceding beltlike metal sheet W1 and the start end part of the succeeding beltlike metal sheet W2 to the upper face of the lower fixture 5 so as to be a close contact state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes a slitter line for cutting a strip metal sheet into a predetermined width, an annealing line for annealing the strip metal sheet, a plating line for surface treatment of the strip metal sheet, and a pipe forming line for producing pipes from the strip metal sheet Installed on the press line that produces various parts such as lead frames from the strip metal sheet, and joined the end of the previous strip metal sheet flowing on the line by butt welding to the end of the new strip metal sheet In particular, the present invention relates to an improvement in a butt-joining apparatus for strip-shaped metal thin plates, and in particular, even for a strip-shaped metal thin plate having a thin thickness (0.1 mm to 0.4 mm) and a wide width (100 mm or more), It is easy and easy to perform the abutment work between the end and the beginning of the following strip metal sheet, overlapping and misalignment of the butt sections of both strip metal sheets, and partial gaps between the butt sections. It relates butt joint device of the belt-like thin metal plate so as to perform an ideal butt no.

  In general, improved productivity in slitter lines, annealing lines, plating lines, pipe making lines, press lines, etc. that continuously process, heat-treat, and surface-treat metal strips wound in a coil shape. In addition, in order to stabilize the quality, etc., the beginning of the new strip metal sheet is joined to the end of the preceding strip metal sheet flowing on the line by butt welding, and the new strip metal sheet is continuously connected to each line. Has been done to supply.

  Conventionally, as a device for joining the beginning of a new succeeding strip-shaped metal thin plate to the end of the preceding strip-shaped thin metal plate flowing on the line by butt welding, the butt-joining device for the strip-shaped thin metal plate previously developed by the present inventor Is known (see, for example, Patent Document 1 and Patent Document 2).

  That is, the strip metal butt joining apparatus is not shown, but the cabinet main body provided with a work table for supporting and placing the terminal end of the preceding belt metal thin plate and the start end of the succeeding belt metal thin plate, A cutting device that cuts the terminal end of the preceding strip metal sheet and the starting end of the subsequent strip metal sheet along the width direction, and is disposed above the work table in an opposing manner with a gap therebetween. Left and right upper clamps that hold the upper surface of the end of the strip metal sheet and the starting end of the subsequent strip metal sheet, and a center position of the work table that is positioned below the upper surface by a predetermined distance. It is arranged and pushed up to the same height as the work table by the cylinder, and in the state where the end of the preceding strip metal sheet and the start end of the following strip metal sheet are butted together, left The lower clamp (lower jig) that is clamped and fixed from above and below by the upper clamp of the upper clamp, and the upper clamp protrudes upward from the upper surface of the lower clamp at the lower position and is inserted into the center of the lower clamp. A fixed center plate that positions the end of the strip metal sheet and the start of the subsequent strip metal sheet, and a work table that can be moved up and down, hold and fix both strip metal sheets on the work table. It consists of a welding device or the like that butt welds the left and right work clamps and the butted portions of both strip-shaped metal thin plates.

  Thus, in the case of joining the beginning of the succeeding strip-shaped metal thin plate to the end of the preceding strip-shaped metal thin plate by butt welding using the above-described strip-shaped metal thin plate butt joining device, first, in the width direction by the cutting device. The leading end of the preceding strip metal sheet and the starting end of the succeeding strip metal sheet cut along the left and right work clamps are inserted below the left and right work clamps, respectively. The starting ends (cut end surfaces) of the strip metal sheets are brought into contact with both side surfaces of the center plate, and in this state, the left and right work clamps are operated to hold and fix the strip metal sheets to the upper surface of the work table.

  Next, after the left and right upper clamps are moved forward and positioned above the lower clamp, the lower clamp is raised to the same height position as the work table by the cylinder. If it does so, the upper end part of a center plate will be pulled out from the cutting | disconnection end surface of both strip | belt-shaped metal thin plates. Along with this, the leading end of the preceding strip metal sheet and the starting end of the following strip metal sheet are bent by the step between the work table and the lower clamp, so each strip sheet has It moves in the direction approached by the elastic force, and the upper and lower clamps on the left and right sides of the two strips of metal strips are in close contact with the end of the strip of thin metal strips and the starting end of the strip of strip metal strips. And are held and fixed from above and below.

  Then, when the vicinity of the butt portion of both strip metal sheets is clamped and fixed by the upper clamp and the lower clamp, the welding device is operated to butt weld the butt portions of both strip metal sheets.

  The band-shaped metal thin plate butt-joining apparatus is configured to butt the end surfaces of the band-shaped metal plates by utilizing the bending and elastic force of the band-shaped metal thin plates. , The end faces of the strip metal sheet can be butted together easily and accurately using the elastic force or the like of the strip metal sheet. As a result, ideal butt welding without partial overlap and gaps can be performed.

However, in the conventional butt joining apparatus for strip metal sheets, when a wide strip metal sheet having a width of 100 mm or more is to be abutted, the preceding strip metal sheet and the subsequent strip metal sheet are moved to the upper surface of the work table by work clamping. When held and fixed, the amount of bending of both strip metal sheets is often uneven between the front side and the back side, and the end of the preceding strip metal sheet and the beginning of the subsequent strip metal sheet are completely There is a problem that the preceding strip-shaped metal thin plate and the subsequent strip-shaped metal thin plate partially overlap each other, or a partial gap is formed at the butted portion of both the strip-shaped metal thin plates.
If both strip metal thin plates are butt-welded in such a state, holes will be formed in the welded portion or overlapped defects, and precise butt welding cannot be performed.
In particular, in the case of an extremely thin strip-shaped metal sheet having a thickness of about 0.1 mm to 0.4 mm and a width of 100 mm or more, it is extremely difficult to accurately and completely abut both strip-shaped metal sheets. There was a problem that welding could not be performed.

Japanese Patent No. 2899276 Japanese Patent No. 3564006

  The present invention has been made in view of such problems, and the object thereof is the end of the preceding strip-shaped metal sheet and the subsequent strip-shaped metal sheet, even if it is a thin wide strip-shaped metal sheet. The strip metal sheet can be easily and easily matched to the beginning of the belt, and can be ideally matched with no overlap or misalignment between the two butted metal strips and no partial gap between the butted parts. The object is to provide a butt joining apparatus.

  In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is for working to support and place the end portion of the preceding strip-shaped metal thin plate and the start end portion of the subsequent strip-shaped metal thin plate cut along the width direction. The left and right sides of the cabinet main body provided with the table and the upper and lower ends of the preceding strip-shaped metal thin plate and the leading end top surface of the following strip-shaped metal thin plate are arranged opposite to each other above the work table. The upper clamp and the work table are arranged so as to be movable up and down, and in the state where the end of the preceding strip metal sheet and the start end of the following strip metal sheet are butted together, A flat plate-like lower jig that is clamped and fixed in the vertical direction by the upper clamp, and a center that is inserted vertically into the lower jig and positions the end of the preceding strip metal sheet and the starting end of the following strip metal sheet Plate and thin metal strip A belt-shaped metal sheet butt-joining apparatus comprising a welding device for butt welding the butt-parts of the first and second strips, and a lower end jig of the preceding belt-shaped metal sheet and a starting end of the subsequent band-shaped metal sheet. It is characterized in that the left and right work clamps that are held and fixed in close contact with the upper surface of the lower jig are arranged so as to be movable up and down.

  According to the second aspect of the present invention, the flat plate-like lower jig is held at the center of the work table at the same height as the upper surface of the work table, and in the vicinity of the butt portion of the two strip-shaped metal thin plates. Is characterized in that it is configured to be pushed up to a position above the upper surface of the work table by the fluid pressure cylinder when holding and fixing the upper and lower clamps from above and below.

According to a first aspect of the present invention, there is provided a butt-joining device for a strip-shaped metal thin plate, wherein a flat strip-shaped lower portion that clamps and fixes the vicinity of a butt portion of a preceding strip-shaped metal thin plate and a succeeding strip-shaped metal thin plate from above and below with left and right upper clamps The left and right work clamps that hold the upper end of the preceding strip-shaped metal sheet and the start end of the subsequent strip-shaped sheet metal in close contact with the upper surface of the lower jig are arranged on the jig so as to be movable up and down. Therefore, when the end of the preceding strip metal sheet and the starting end of the following strip metal sheet are abutted and fixed on the upper surface of the lower jig, the end portion of the preceding strip metal sheet and the following strip metal sheet The belt-like metal thin plates can be butt-fixed in a state in which the flat plate is straight with the starting end of the belt.
As a result, by using the strip metal butt joining apparatus according to claim 1 of the present invention, the end of the preceding strip metal sheet and the beginning of the subsequent strip metal sheet even if the strip metal sheet is thin and wide. Can be performed easily and accurately with high accuracy, and ideal matching can be performed with no overlap or misalignment between the butted portions of the two belt-like metal thin plates and no partial gap between the butted portions. As a result, there is no perforation or overlap defect in the welded portion, and stable and precise butt welding can be performed even if the worker is a beginner.

  Further, in the butt-joining apparatus for strip-shaped metal thin plates according to claim 2 of the present invention, the flat plate-like lower jig is held at the same height position as the upper surface of the work table at the center of the work table, When the vicinity of the abutting part of both strip metal sheets is clamped and fixed from the top and bottom with the left and right upper clamps, it is configured to be pushed up above the upper surface of the work table by the fluid pressure cylinder. Since the upper surface of the lower jig is flush with the upper surface of the work table, the upper end of the lower metal plate and the starting end of the subsequent strip-shaped metal thin plate are flush with each other. Furthermore, it is possible to more easily and easily perform the abutting work between the two strip-shaped metal thin plates.

It is a perspective view of the butt joining apparatus of the strip | belt-shaped metal thin plate which concerns on embodiment of this invention. It is a front view of the butt joining apparatus of a strip | belt-shaped metal thin plate. It is a side view of the butt joining apparatus of a strip | belt-shaped metal thin plate. The left and right upper clamps and the welding device are shown. (A) is a plan view of the upper clamp and the welding device, and (b) is a side view of the upper clamp and the welding device. It is the AA line expanded sectional view of FIG. FIG. 5 is an enlarged sectional view taken along line BB in FIG. 4. It is a top view of the lower jig | tool which has arrange | positioned the work clamp. It is a side view of the lower jig which provided the work clamp. It is a bottom view of a lower jig provided with a work clamp. It is a vertical front view of the lower jig | tool which has arrange | positioned the work clamp. With the left and right work clamps, the lower end of the leading strip metal sheet and the leading end of the trailing strip metal sheet are bottom-treated with the leading end of the preceding strip metal sheet abutting the starting edge of the trailing strip metal sheet. It is a vertical front view of the principal part of the state hold | maintained and fixed to the upper surface of a tool. The lower jig is raised, the vicinity of the butt part of both strips of metal sheet is clamped and fixed from above and below by the upper and lower clamps on the left and right, and the butt part of both strips of sheet metal is butt welded by a welding device. It is a vertical front view of a part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 to FIG. 3 show a strip metal butt joining apparatus according to an embodiment of the present invention. The strip metal butt joining apparatus processes, heat-treats, and processes the strip metal thin plate wound in a coil shape. It is installed on each line such as slitter line, annealing line, plating line, pipe making line, press line, etc. that performs processing etc. continuously, and it is new at the end of the preceding strip metal sheet W1 flowing on the line The starting end of the strip-shaped metal thin plate W2 is joined by butt welding so that the new succeeding strip-shaped metal thin plate W2 can be supplied onto the line following the preceding strip-shaped metal thin plate W1.

  That is, as shown in FIG. 1 to FIG. 3, the belt-shaped metal sheet butt-joining apparatus is used for horizontal work for supporting and placing the end portion of the preceding belt-shaped metal sheet W1 and the starting end portion of the succeeding band-shaped metal sheet W2. A cabinet body 1 provided with a table 2, a cutting device 3 for cutting along the width direction the end portion of the preceding strip-shaped metal thin plate W 1 and the start end portion of the following strip-shaped metal thin plate W 2, and above the work table 2 Left and right upper clamps 4 which are arranged in a facing manner with a space between them and hold the upper surface of the end portion of the preceding strip-shaped metal thin plate W1 and the upper surface of the start end portion of the subsequent strip-shaped thin metal plate W2, and the central portion of the work table 2 The upper and lower clamps are disposed in the vicinity of the abutting portions of the two strip metal thin plates W1 and W2 with the end of the preceding strip metal thin plate W1 and the beginning of the subsequent strip metal thin plate W2 butted. 4 and hold from the top and bottom A flat plate-like lower jig 5 and a vertically movable center plate 6 that is vertically inserted into the lower jig 5 and positions the end of the preceding strip-shaped metal thin plate W1 and the start end of the subsequent strip-shaped metal thin plate W2. And the lower jig 5 is arranged to be movable up and down, and the end portion of the preceding strip metal thin plate W1 and the start end portion of the following strip metal thin plate W2 are held and fixed in close contact with the upper surface of the lower jig 5, respectively. The right and left work clamps 7, the welding device 8 that butt-welds the butted portions of both strip metal thin plates W1 and W2, and the welded portion of both strip metal thin plates W1 and W2 are rolled to uniformize the thickness and structure of the welded portion. And the end of the preceding strip metal thin plate W1 even if it is a wide strip metal plate having a plate thickness of 0.1 mm to 0.5 mm and a width of 100 mm or more. Matching with the beginning of the trailing strip metal sheet W2 Business of performing in a simple and accurately precision, overlap and misalignment of the butted portion of the two strip-like sheet metal, partial clearance of the butt section is obtained so as to perform an ideal butt weld no.

  The cutting device 3 and the rolling device 9 are disposed in the cabinet body 1 on the back side of the work table 2 so as to be reciprocally movable in the front-rear direction (the width direction of the two strip metal thin plates W1, W2). At the time of cutting the strip-shaped metal thin plates W1 and W2, they are pulled out to the working table 2 side at the time of rolling the welded portions of both strip-shaped metal thin plates W1 and W2. Since the cutting device 3 and the rolling device 9 have the same structure as that conventionally known, detailed description thereof is omitted here.

As shown in FIG. 1, the cabinet body 1 includes a work table 2 in a horizontal position at an intermediate portion on the front side, and a rectangular portion in which a lower jig 5 is accommodated in the center of the work table 2. A large opening 2a is formed.
Further, on the front side of the cabinet body 1, a touch panel 10 for displaying welding current, welding speed, and the like by setting welding conditions and the like, various switches 11 and the like are disposed.
Further, a welding power supply device and its control device, a welding gas cylinder and its accessories, a cutting device 3 and a control device for the welding device 8 are stored in the cabinet body 1 (all not shown). .

  The left and right upper clamps 4 are accommodated in the cabinet main body 1 and horizontally moved to a position above the opening 2a of the work table 2 on the lower surface side of the upper frame 12 of the welding apparatus 8, and the widths of the two strip-like thin metal plates W1, W2 It is arranged in a posture along the direction and facing each other with a predetermined gap, and holds the upper surface of the end portion of the preceding strip-shaped metal thin plate W1 and the upper surface of the start end portion of the subsequent strip-shaped metal thin plate W2. The left and right upper clamps 4 mainly block arc spreading when welding the butted portions of both strip metal thin plates W1 and W2, and concentrate arc energy at the butted portions of both strip metal thin plates W1 and W2. To give.

Specifically, as shown in FIGS. 4 to 6, the left and right upper clamps 4 are formed in a long plate shape longer than the width of the two strip-like metal thin plates W1 and W2 with a copper material. The two strip-shaped metal thin plates W1 and W2 travel on the lower surface side of the sheet metal via the left and right slide plates 13 and a plurality of linear guides 14 (the linear guide 14 includes a guide rail 14a and a slider 14b sliding on the guide rail 14a). It is attached so as to be reciprocally movable in the direction, and is configured such that the gap can be adjusted according to the thickness of the two strip-shaped metal thin plates W1, W2 to be butt welded.
The left and right upper clamps 4 are attached to the lower surface side of the left and right slide plates 13 that reciprocate in the traveling direction of the two belt-like metal thin plates W1 and W2 by a plurality of bolts 15 so as to be swingable in the vertical direction. A plurality of compression coil springs 16 interposed between the left and right slide plates 13 and the left and right upper clamps 4 are biased downward, and the tip portions formed in an acute angle are in the vicinity of the butt portions of the two strip-shaped metal thin plates W1 and W2. It is made to contact elastically with the upper surface of.
Further, the left and right upper clamps 4 are reciprocally moved in the running direction of the two strip metal thin plates W1 and W2 by a clamp width adjusting mechanism 17 provided between the upper frame 12 and the left and right slide plates 13, and are both strip-shaped for butt welding. The gap between the left and right upper clamps 4 can be finely adjusted according to the thickness of the metal thin plates W1 and W2.

As shown in FIG. 5, the clamp width adjusting mechanism 17 has a clamp width adjusting bracket 17a fixed to the upper surface of the left and right slide plates 13 and a posture along the traveling direction of the two strip metal thin plates W1 and W2 on the upper frame 12. The clamp width adjustment bolt 17b is supported between the upper frame 12 and the clamp width adjustment bracket 17a. The clamp width adjustment bolt 17b is supported between the upper frame 12 and the clamp width adjustment bracket 17a. The clamp width adjusting bracket 17a and the compression coil spring 17c for urging the left and right slide plates 13 in the approaching direction are provided, and when the clamp width adjusting bolt 17b is rotated forward or backward, the clamp width adjusting bolt 17b The clamp width adjusting bracket 17a and the left and right slide plates 13 are moved to the clamp width adjusting bolt 17b each time the motor rotates once. By the pitch of the formed thread is moved toward the travel direction of both strip sheet metal W1, W2.
Accordingly, the left and right upper clamps 4 attached to the lower surfaces of the left and right slide plates 13 are also moved in the traveling direction of the two strip-shaped metal thin plates W1 and W2, and the gap between the left and right upper clamps 4 is adjusted.

  The lower jig 5 is disposed in a rectangular opening 2a formed in the central portion of the work table 2 so as to be movable up and down, and the end of the preceding strip-shaped metal sheet W1 and the subsequent strip-shaped metal sheet W2 are disposed. In this state, the vicinity of the butted portions of the two strip-shaped metal thin plates W1 and W2 is clamped and fixed with the left and right upper clamps 4 in the vertical direction. The lower jig 5 absorbs excess heat when butt-welding the butted portions of the two strip metal thin plates W1 and W2 to prevent the beads from being melted or perforated. A shield gas such as argon gas is allowed to flow on the back side of the butt portion of W2 to prevent oxidation of the welded portion.

  That is, as shown in FIG. 10, the lower jig 5 is disposed in a lower jig base 18 having a cross-sectional shape attached to the lower surface side of the peripheral edge of the opening 2a of the work table 2 so as to be movable up and down. The lower clamp 5 ′ located in the opening 2 a of the table 2 and a pair of back bars 5 ″ fitted and fixed to the upper surface of the substantially central portion of the lower clamp 5 ′ in a replaceable manner. Two lower jig fluid pressure cylinders 19 provided on the side move up and down with respect to the work table 2.

  Specifically, as shown in FIGS. 7 and 10, the lower clamp 5 ′ is formed by a copper material in a rectangular thick plate shape slightly smaller than the opening 2 a of the work table 2. A groove-like recess 5a into which a pair of back bars 5 "are exchangeably fitted is formed on the upper surface. This recess 5a is substantially along the width direction of the strip-shaped metal thin plate on the upper surface of the lower clamp 5 '. A narrow groove 5b through which a shield gas flows is formed on the bottom surface.

  On the other hand, as shown in FIGS. 7 and 10, the pair of back bars 5 ″ are formed in a long plate shape having the same thickness as the depth of the recess 5a of the lower clamp 5 ′ by using a copper material. The recesses 5a are fitted in the recesses 5a with the side surfaces facing each other, and are fixed in the recesses 5a by a plurality of bolts 20. At this time, the upper surfaces of the pair of back bars 5 "and the lower clamps 5 ' These are flush with each other, and a slit-like groove is formed between the pair of back bars 5 ″ so that the shield gas flows in communication with the narrow groove of the lower clamp 5 ′.

  The lower jig 5 is located in the opening 2 a of the work table 2 and is disposed in the lower jig base 18 so as to be movable up and down. The lower jig 5 is provided on the lower surface side of the lower jig base 18. When the tool fluid pressure cylinder 19 is shortened, the upper surface of the lower jig 5 (the upper surface of the lower clamp 5 'and the upper surface of the back bar 5 ") is held at the same height as the upper surface of the work table 2, and the lower portion When the jig fluid pressure cylinder 19 is extended, the upper surface of the lower jig 5 is pushed up to a position higher than the upper surface of the work table 2.

  The lower clamp 5 'of the lower jig 5 is provided with a start tab 21 for generating an initial arc. The start tab 21 is formed of a copper material in a cylindrical shape, and is screwed and fixed at a position on the back side of the lower clamp 5 ′ and in the vicinity of one end of the groove-like recess 5 a so that the height can be adjusted.

  As shown in FIG. 10, the center plate 6 is formed in a long plate shape with a thin steel plate, and is formed in a slit groove 5c formed on the bottom surface of the narrow groove 5b through which the shielding gas of the lower clamp 5 'flows. The center plate 6 is vertically arranged between the pair of back bars 5 ″ and is freely movable up and down. The center plate 6 is elongated in the rod of the center plate hydraulic cylinder 22 attached to the lower surface of the lower clamp 5 ′. The center plate fluid pressure cylinder 22 is housed in the lower jig 5 when the center plate fluid pressure cylinder 22 is shortened. The lower jig 5 protrudes upward from the upper surface (the upper surface of the lower clamp 5 ′ and the upper surface of the back bar 5 ″) by several millimeters.

  The left and right work clamps 7 are disposed on the inner side of the lower clamp 5 'of the lower jig 5 so as to be movable up and down, and the end portions of the preceding strip-shaped metal thin plate W1 and the trailing strip-shaped metal thin plate W2 are arranged. Each of the start ends is held and fixed in close contact with the upper surface of the lower jig 5.

  Specifically, as shown in FIGS. 7 to 10, the left and right work clamps 7 include a clamp claw 7a having a reverse L-shaped cross section inserted into the back side portion of the lower clamp 5 'so as to freely move up and down, The clamp claw fluid pressure cylinder 7b fixed to the lower surface of the clamp 5 ', and the clamp claw 7a and a cylinder connector 7c for interlockingly connecting the rods of the clamp claw fluid pressure cylinder 7b, At the time of shortening, a gap is formed between the front end of the clamp claw 7a and the upper surface of the lower clamp 5 'so that the side portions of the strip-like metal thin plates W1 and W2 can be inserted, and when the clamp claw fluid pressure cylinder 7b is extended. The clamp claw 7a is pushed down via the cylinder connector 7c, and the belt-like metal thin plates W1 and W2 are held and fixed to the upper surface of the lower clamp 5 'by the tip of the clamp claw 7a. It has become.

  Note that a positioning stopper 24 for positioning the both strip-shaped metal thin plates W1, W2 in the width direction is disposed in the vicinity of the left and right work clamps 7 and in the lower jig 5. The positioning stopper 24 is fixed by bolts 25 at positions near the left and right workpiece clamps 7 and on the upper surface of the lower clamp 5 ′ of the lower jig 5.

  The welding device 8 is disposed at a position above the lower jig 5 so as to be able to reciprocate in the front-rear direction, and a standby position located in the cabinet body 1 and a welding work position located above the lower jig 5. Can be taken. The welding device 8 is pulled forward when the butt welding of the two strip metal thin plates W1, W2, and the welding torch 29 moves linearly along the butt portion of the two strip metal thin plates W1, W2 at a predetermined speed. It has become.

That is, as shown in FIGS. 1, 4 and 5, the welding apparatus 8 includes a substantially frame-shaped upper frame 12 supported in the cabinet body 1 so as to be reciprocally movable in the front-rear direction, and the upper frame 12 as a standby position. A drive unit (not shown) such as a fluid pressure cylinder that reciprocates over the welding work position, and a reciprocating movement along the width direction of both strip-shaped metal thin plates W1 and W2 via the guide roller 26 on the upper frame 12. The torch travel member 27 supported, the welding torch 29 supported by the tip of the torch travel member 27, flowing the shield gas from the tip, and having the tungsten electrode rod 28 attached thereto, the torch travel member 27 and the welding Torch travel drive comprising a motor 30a, a rack 30b, a pinion gear (not shown) and the like for reciprocally moving the torch 29 along the width direction of both strip-shaped metal thin plates W1, W2. And a location 30 like.
Further, the upper frame 12 is provided with a locking piece 12a which is inserted into a receiving hole 31a of the upper frame receiver 31 fixed to the upper surface on the front side of the work table 2 at the tip thereof. At the welding work position, the locking piece 12a is inserted and locked into the receiving hole 31a of the upper frame receiver 31, and the upper frame 12 is prevented from shaking in the lateral direction and the vertical direction. As a result, the welding torch 29 moves accurately along the abutting portions of the two strip-shaped metal thin plates W1 and W2, and good welding can be performed.

  Next, a description will be given of a case where the start end of a new succeeding strip-shaped metal thin plate W2 is joined by butt welding to the end of the preceding strip-shaped thin metal plate W1 flowing on the line using the above-described strip-shaped thin metal plate butt joining apparatus. .

  In addition, for both strip metal thin plates W1 and W2, wide thin strip metal plates with a thickness of 0.1 mm to 0.5 mm and a width of 100 mm to 200 mm such as copper, aluminum, stainless steel, titanium, magnesium, etc. are used. ing. Also, welding conditions such as welding current, arc length, supply amount of shielding gas, traveling speed of welding torch 29, tip shape of tungsten electrode rod 28, etc., depend on the material, thickness, width, etc. of the strip metal sheet. Of course, it is set under optimum conditions.

  First, the cutting device 3 is pulled out to the work table 2 side, and the cutting device 3 cuts the end portion of the preceding strip-shaped metal thin plate W1 and the start end portion of the succeeding strip-shaped thin metal plate W2 in a straight line along the width direction. After that, the cutting device 3 is retracted and stored in the cabinet body 1.

  Next, the center plate 6 is raised by the center plate fluid pressure cylinder 22 so that the upper end portion of the center plate 6 protrudes upward from the upper surface of the lower jig 5.

  When the center plate 6 is protruded upward from the upper surface of the lower jig 5, the side of the starting end of the succeeding strip-shaped metal thin plate W 2 is inserted below the clamp claw 7 a of the left work clamp 7, and the succeeding strip-shaped metal strip W 2 is inserted. The side of the starting end portion of the thin metal plate W2 is pressed against the left positioning stopper 24, and the subsequent strip-shaped thin metal plate W2 is positioned in the width direction. Further, the cut end face (cut end face) of the succeeding strip metal thin plate W2 is pressed against one side surface of the center plate 6, and the start end side edge of the follow strip metal thin plate W2 is pressed against the start tab 21. In this state, the work clamp 7 on the left side is operated to hold and fix the starting end portion of the subsequent strip-shaped metal thin plate W2 in close contact with the upper surface of the lower jig 5 by the work clamp 7 on the left side.

  Thereafter, the center plate 6 is lowered by the center plate fluid pressure cylinder 22 and stored in the lower jig 5, and the end side of the preceding strip-shaped metal thin plate W <b> 1 is moved below the clamp claw 7 a of the right work clamp 7. Insert and press the end side of the preceding strip metal thin plate W1 against the right positioning stopper 24 to position the preceding strip metal thin plate W1 in the width direction. Further, the cut end surface (cut end surface) of the preceding strip-shaped metal thin plate W1 is first held and fixed on the upper surface of the lower jig 5 by visual observation, and is abutted against the start end surface of the subsequent strip-shaped metal thin plate W2, and the preceding strip-shaped metal plate W1. The end edge of the thin metal plate W1 is pressed against the start tab 21. In this state, the right work clamp 7 is operated, and the leading end of the preceding strip metal thin plate W1 is moved to the upper surface of the lower jig 5 by the right work clamp 7. It is held and fixed in close contact (see FIG. 11).

At this time, the left and right sides of the flat plate-like lower jig 5 are held and fixed to the upper surface of the lower jig 5 in close contact with the end portion of the preceding belt-like metal thin plate W1 and the start end portion of the following belt-like metal thin plate W2. Since the workpiece clamp 7 is arranged so as to be movable up and down, when the end of the preceding strip metal thin plate W1 and the start end of the subsequent strip metal thin plate W2 are butted and fixed on the upper surface of the lower jig 5, The both strip metal thin plates W1 and W2 can be butt-fixed in a state where the end portion of the preceding strip metal thin plate W1 and the start end portion of the following strip metal thin plate W2 are straight plates.
As a result, even if it is a thin and wide strip-shaped metal thin plate, the abutting operation between the end of the preceding strip-shaped metal thin plate W1 and the start of the subsequent strip-shaped metal thin plate W2 can be easily and accurately performed with high accuracy. It is possible to perform an ideal butt without any overlap or misalignment between the butt portions of the two strip-shaped metal thin plates W1 and W2 and no partial gap between the butt portions.
In particular, the flat plate-like lower jig 5 is held at the center of the work table 2 at the same height as the upper surface of the work table 2, so that the end of the preceding belt-like metal thin plate W <b> 1 and the following belt shape are formed. When the butt end of the metal thin plate W2 is abutted and fixed on the upper surface of the lower jig 5, it can be performed more easily and easily than the abutting of the two strip metal thin plates W1 and W2.
Further, since the positioning stopper 24 for positioning the both strip-shaped metal thin plates W1, W2 in the width direction is disposed in the vicinity of the left and right workpiece clamps 7 and on the lower jig 5, both the strip-shaped metal thin plates W1, W2 are disposed. Can be accurately matched without shifting in the width direction.

  When the end of the preceding strip metal thin plate W1 and the start end of the subsequent strip metal thin plate W2 are abutted and fixed on the upper surface of the lower jig 5, the upper frame 12 of the welding device 8 is moved from the standby position to the welding work position. The left and right upper clamps 4 are moved forward to a position above the abutting portion of both strip-shaped metal thin plates W1 and W2. In this state, the lower jig 5 is raised by the lower jig fluid pressure cylinder 19, and the height position of the upper surface of the lower jig 5 is set to a height position substantially the same as the height position of the lower surface of the upper clamp 4. As a result, the vicinity of the abutting portion of both strip-shaped metal thin plates W1 and W2 is clamped and fixed from above and below by the upper clamp 4 and the lower jig 5 (see FIG. 12).

At this time, since both the strip-shaped metal thin plates W1 and W2 are lifted upward together with the lower jig 5 in a state where the cut end surfaces are completely butted by the left and right work clamps 7, the end surfaces of the cut end portions are In a state of being accurately and surely abutted, the left and right upper clamps 4 and the lower jig 5 are tightly clamped and fixed.
In addition, since the tip portions of the left and right upper clamps 4 are elastically brought into contact with the upper surfaces in the vicinity of the abutting portions of the two strip metal thin plates W1 and W2 by a plurality of compression coil springs 16, a wide strip metal thin plate is used. Even if it exists, the whole edge part can be uniformly pressed to the upper surface of the lower jig | tool 5 over the width direction, and both strip | belt-shaped metal thin plates W1 and W2 can be matched with high precision.

  When the vicinity of the abutting portion of both the strip-shaped metal thin plates W1 and W2 is clamped and fixed from above and below by the left and right upper clamps 4 and the lower jig 5, the height of the welding torch 29 of the welding apparatus 8 is adjusted, and then the welding torch 29 An arc is generated between the tip of the tungsten electrode rod 28 and the start tab 21. When the arc is stabilized, the welding torch 29 moves along the width direction of the strip metal thin plates in this state, and butt welds the butt portions of both strip metal thin plates W1 and W2.

  When the butt welding of the butt portions of the two strip metal thin plates W1, W2 is completed, the arc and shield gas are stopped, the lower jig 5 is lowered, and the welding device 8 is retracted from the welding work position to the standby position. Further, the holding and fixing state of the two belt-like metal thin plates W1 and W2 by the left and right work clamps 7 is released. Thereby, both the strip | belt-shaped metal thin plates W1 and W2 butt-welded will be in a free state.

  Finally, both strip-shaped metal thin plates W1 and W2 in a free state are rolled by the manual rolling device 9, and the thickness and structure of the welded portions of both strip-shaped metal thin plates W1 and W2 are made uniform. Is done.

In this way, the above-described band-shaped metal thin plate butt-joining apparatus has the flat jig-like lower jig 5 with the end portion of the preceding belt-like metal thin plate W1 and the start end portion of the following belt-like metal thin plate W2 as the lower jig 5. Since the left and right work clamps 7 that are held and fixed to the upper surface of the lower metal plate 5 are disposed, the end of the preceding strip-shaped metal thin plate W1 and the start end of the subsequent strip-shaped metal thin plate W2 are abutted and fixed on the upper surface of the lower jig 5. In some cases, the belt-like metal thin plates W1 and W2 can be butt-fixed in a state in which the end portion of the preceding belt-like metal thin plate W1 and the start end portion of the succeeding belt-like metal thin plate W2 are straight plates.
As a result, even if it is a wide strip-shaped metal thin plate having a small thickness, the abutting operation between the end of the preceding strip-shaped metal thin plate W1 and the start end of the subsequent strip-shaped metal thin plate W2 can be easily and accurately performed with high accuracy. Ideal matching can be performed with no gaps or overlaps between the butting parts and no deviation of the butting parts. As a result, there is no perforation or overlap defect in the welded portion, and stable and precise butt welding can be performed even if the worker is a beginner.

  In the above embodiment, the lower clamp 5 'of the lower jig 5 is formed so that the planar shape is rectangular, and a pair of back bars 5 "are fitted and fixed at substantially the center thereof. Although the groove-shaped recess 5a is formed, although not shown in other embodiments, the lower clamp 5 'is divided into two left and right lower clamps, and the left and right lower clamps are opposed to each other. A narrow notch may be formed on the upper surface of the corner of the side edge, and the back bar 5 ″ may be fitted and fixed to the notches of the left and right lower clamps.

  Further, in the above embodiment, the starting end portion of the succeeding strip-shaped metal thin plate W2 is first positioned and then held and fixed to the upper surface of the lower jig 5 by the left work clamp 7, and thereafter The end of the strip metal thin plate W1 is abutted against the starting end of the subsequent strip metal thin plate W2, and the end of the preceding strip metal thin plate W1 is held and fixed to the upper surface of the lower jig 5 by the work clamp 7 on the right side. In other embodiments, the leading end of the preceding strip-shaped metal thin plate W1 is first positioned and then held and fixed to the upper surface of the lower jig 5 by the right work clamp 7, and then the subsequent strip-shaped strip is formed. The starting end of the thin metal plate W2 may be abutted against the end of the preceding belt-like metal thin plate W1, and the starting end of the following belt-like metal thin plate W2 may be held and fixed to the upper surface of the lower jig 5 by the work clamp 7 on the left side. .

  1 is a cabinet body, 2 is a work table, 4 is upper and lower clamps, 5 is a lower jig, 6 is a center plate, 7 is left and right work clamps, 8 is a welding device, 19 is a hydraulic cylinder for lower shafts, W1 is a preceding strip metal sheet, and W2 is a subsequent strip metal sheet.

Claims (2)

  Cabinet main body (1) provided with a work table (2) for supporting and placing the end portion of the preceding strip metal sheet (W1) cut along the width direction and the start end portion of the following strip metal sheet (W2) And arranged above the work table (2) with a space therebetween, holding the upper end surface of the preceding strip metal sheet (W1) and the upper end surface of the following strip metal sheet (W2). The left and right upper clamps (4) and the work table (2) are arranged to be movable up and down, and protrude from the end of the preceding strip metal sheet (W1) and the beginning of the subsequent strip metal sheet (W2). A flat plate-like lower jig (5) for holding the belt-shaped metal thin plates (W1) and (W2) near the butted portions with the upper and lower upper clamps (4) from above and below in the assembled state, and the lower jig (5) is inserted vertically and the end and rear of the preceding strip metal sheet (W1) A strip-shaped metal sheet comprising a center plate (6) for positioning the starting end of the strip-shaped metal sheet (W2) and a welding device (8) for butt welding the butted portions of both strip-shaped metal sheets (W1), (W2). In the butt joining apparatus, the lower jig (5) is connected to the end of the preceding strip metal thin plate (W1) and the start end of the subsequent strip metal thin plate (W2), respectively. A strip-shaped metal thin plate butt joining apparatus, wherein left and right work clamps (7) that are held and fixed in close contact with the upper surface of the metal plate are vertically movable.   The flat plate-like lower jig (5) is held at the center of the work table (2) at the same height as the upper surface of the work table (2). When the vicinity of the butting portion of W2) is clamped and fixed with the left and right upper clamps (4) from above and below, the fluid pressure cylinder (19) is pushed up above the upper surface of the work table (2). 2. The apparatus for butt-joining strip metal sheets according to claim 1.

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