JP6508840B2 - Butt welding device for strip-shaped sheet metal - Google Patents

Description

  The present invention is, for example, a processing line for continuously performing rolling, heat treatment, surface treatment, etc. of strip-shaped metal thin plates such as electromagnetic steel sheets, or lead frames, connectors and chassis from strip-shaped metal thin plates such as stainless steel, iron, copper and aluminum. Is installed in a press line or tube production line that produces various parts such as pipes, etc., and the beginning end of a new trailing strip metal sheet is joined by butt welding to the end of the leading strip metal sheet flowing on the line The present invention relates to a butt-joining apparatus for strip-shaped metal thin plates, and more particularly, to a butt-joining apparatus for strip-shaped metal thin plates capable of recovering and removing welding fumes generated during welding of the strip-shaped metal sheets.

  Conventionally, as a butt joining apparatus of this kind of strip-like metal thin plate, the patent 3974464 (patent document 1), the patent 4733578 (patent document 2), the patent 4927782 which this inventor developed previously Those disclosed in (Patent Document 3), Patent No. 5180898 (Patent Document 4), Patent No. 5199920 (Patent Document 5), Patent No. 5809378 (Patent Document 6), and the like are known.

  That is, although the butt-joining apparatus for the strip-like metal thin plate is not shown, the cabinet main body provided with a horizontal work table for supporting and placing the strip-like metal thin plate, the end portion of the preceding strip-like metal thin plate and the following strip A cutting device for cutting the starting end of the thin metal plate along the width direction, and left and right pressing the vicinity of the butting portion from above with the cutting ends of the preceding thin sheet metal and the following thin sheet A welding apparatus equipped with an upper clamp and a TIG welding torch for butt welding the butt sections of both strip metal sheets, etc. is provided, and butt welding of the strip metal sheets can be performed with high accuracy and high efficiency. Have an advantage.

  By the way, in arc welding such as TIG welding, welding fumes are generated at the time of welding. In this welding fume, the metal melted by the heat of the arc becomes a vapor, and the vapor is cooled in the air to form solid (metal oxide) fine particles, which is very harmful to the human body. It is. When a large amount of the welding fumes is aspirated, metal fever may appear as an acute symptom and pneumoconiosis may be applied as a chronic symptom.

  However, in the conventional butt-joining apparatus for strip-like thin metal plates shown in Patent Documents 1 to 6, the circumference of the TIG welding torch is open in all cases, and welding is performed in the above state. The worker may suction the generated welding fumes or the surrounding workers may also suction the welding fumes, which causes a problem in safety.

  In addition, if a large amount of generated welding fumes adheres to the welds and around the welds of the strip-like thin metal plates, the corrosion resistance is significantly impaired, and the problem of having to newly perform operations such as cleaning as post-treatment is also is there.

  Further, in the butt-joining apparatus in which the work table is divided into right and left and can be moved up and down, the relatively large work table is lifted, and the upper and lower clamps press the vicinity of the butting portion of the strip metal thin plate from above. Therefore, a plurality of fluid pressure cylinders are required to vertically move the work table divided into right and left, which causes a problem that the structure becomes complicated and the cost increases.

Patent No. 3974464 gazette Patent No. 4733578 Patent No. 4927782 Patent No. 5180898 gazette Patent No. 5199920 gazette Patent No. 5809378 gazette

  The present invention has been made in view of such problems, and an object thereof is to recover and remove welding fumes generated at the time of welding of strip-like thin metal sheets to ensure the safety of workers and It is an object of the present invention to provide a butt-joining apparatus for strip-like thin metal sheets, which eliminates the need for post-treatments of the steel sheet and enables simplification of the structure.

In order to achieve the above object, the butt-joining apparatus for strip-shaped metal sheets according to the present invention supports and mounts the end of the preceding strip-shaped metal sheet cut along the width direction and the beginning of the trailing strip-shaped metal sheet. Cabinet body provided with a work table, and the left and right upper parts pressing the vicinity of the butt joint portion of both strip metal thin plates from above in a state where the end of the preceding strip metal thin plate and the start end of the following strip metal thin plates are butted A butt-joining apparatus for a strip-like metal thin plate, comprising: a clamp; and a welding device provided with a welding torch which reciprocates along the butt-joining portions of the two strip-like metal thin plates and butts welds the butt-joining portion. is provided with a welding fume collecting device is removed by collecting the welding fumes generated during welding, the welding fume collecting device is openably mounted et the front of the cabinet body A safety cover for covering the entire space around the welding torch which reciprocates along the butt portion of both strip metal thin plates and the entire upper surface of the work table to prevent the welding fumes generated during the welding operation from leaking to the outside; A vacuum generator provided in the main body and connected in a communicating manner to the inner space of the safety cover via a suction pipe or a suction hose, and attached to the side of the cabinet body, interposed in the middle of the suction pipe or suction hose And a welding fume recovery device for recovering the welding fumes sucked together with air by the vacuum generator .

Preferably , a welding fume suction hood is disposed within the safety cover and in the vicinity of the welding torch, and a suction pipe or suction hose is connected to the welding fume suction hood .

  Preferably, a plurality of welding fume recovery devices are interposed in series in the middle of the suction pipe or suction hose.

  The welding fume recovery device has a cyclone structure which separates the air sucked by the vacuum generator and the welding fume by a cyclone effect, and a dust case for recovering the welding fume separated from the air by the cyclone effect, a cyclone effect And a filter for removing welding fumes not separated by the

The welding apparatus includes an upper frame which is reciprocally movable in the width direction of the strip-like thin metal plate between a standby position located at the upper rear of the work table and a welding operation position located at the upper side of the work table provided with an upper clamp the left and right frame, the upper frame and vertically movable supported by one fluid pressure cylinder, and butt portion proximity of the strip-like sheet metal on the top clamp of the left and right is lowered by one fluid pressure cylinder the upper frame Is preferably pressed from above.

  The butt-joining apparatus for strip-shaped metal thin plates according to the present invention includes a welding fume recovery apparatus for recovering and removing welding fumes generated during welding, so that a worker does not suction the welding fumes during the welding operation. Extremely safe.

  Further, in the butt-joining apparatus for strip-shaped metal thin plates according to the present invention, since the welding fumes generated at the time of the welding operation are recovered and removed by the welding fume recovery unit, the generated welding fumes adhere to the welded portion of the strip-shaped metal sheets Needless to say, there is no need to perform post-treatments such as cleaning of welds.

  Further, in the butt-joining apparatus for strip-shaped metal sheets according to the present invention, the welding fume recovery unit of the welding fume recovery unit has a cyclone structure in which the air sucked by the vacuum generator and the welding fumes are separated by a cyclone effect. The dust case for recovering the welding fume separated from the air by the cyclone effect and the filter for removing the welding fume not separated from the air by the cyclone effect allow the recovery and removal of the welding fume generated during the welding operation. As the high rate increases, the filter is less likely to be clogged and the number of maintenances is reduced. In addition, when a plurality of welding fume collectors are connected in series in the middle of the suction pipe or the suction hose, the collection and removal rate of the welding fumes is further improved.

  Furthermore, in the butt-joining apparatus for strip-shaped metal sheets according to the present invention, the welding fume recovery apparatus covers at least the periphery of the welding torch that reciprocates along the abutting sections of both strip-shaped metal sheets, Since it has an openable and closable safety cover that prevents leakage of the welding fumes, the welding fumes generated during the welding operation do not float around the workers, and the generated welding fumes are recovered reliably and favorably. It can be removed.

  Furthermore, according to the present invention, the butt-joining apparatus for strip-shaped metal thin plates is configured such that the upper frame provided with the left and right upper clamps can be moved up and down by the fluid pressure cylinder, and the upper frame is lowered by the fluid pressure cylinder and the strip Since the vicinity of the butting portion of the thin plate is pressed from above, the number of fluid pressure cylinders can be reduced as compared with a butt bonding apparatus in which the work table is divided into right and left and can be moved up and down, and the structure is simplified. And cost reduction.

It is a front view of butt welding device of a strip shaped metal thin plate concerning one embodiment of the present invention. It is a side view of the butt welding apparatus similarly. It is a top view of a butt welding apparatus similarly. It is a perspective view of a work table and a cutting device. It is a perspective view of a cutting device. It is a perspective view of an upper clamp on either side and a welding device. It is a partially broken front view of a left upper clamp and a welding device. It is a partially broken side view of a left upper clamp and a welding device. It is a partially broken plan view of the upper clamp on either side and a welding device. FIG. 1 is a schematic view of a welding fume recovery system.

Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.
1 to 3 show a butt-joining apparatus for strip-shaped metal thin plates according to an embodiment of the present invention, wherein the butt-joining unit for strip-shaped metal thin plates comprises rolling, heat treatment, surface treatment, etc. Installed in a processing line to be performed continuously, or in a press line or pipe-making line that produces various parts such as lead frames, connectors, chassis, pipes, etc. from strip-like thin metal plates such as stainless steel, iron, copper and aluminum. The beginning of the new trailing strip metal sheet W2 is joined by butt welding to the end of the leading leading strip metal sheet W1 flowing on the line, and the new trailing strip metal sheet W2 is joined to the leading strip metal sheet W1. It is made to be able to supply continuously on the line.

  That is, as shown in FIGS. 1 to 3, in the butt-joining apparatus for the strip-like metal thin plate, the end of the preceding strip-like thin metal plate W1 and the starting end of the following strip-like thin metal plate W2 are respectively supported and placed Between the left and right work table 1 and the cabinet main body 2 provided with the left and right work tables 1 for abutting the cut end of the preceding strip metal thin plate W1 and the cut start end of the trailing strip metal sheet W2 A cutting device 3 disposed at the same time and simultaneously cutting the end portion of the preceding strip metal thin plate W1 and the start end portion of the following strip metal thin plate W2 along the width direction, and the vicinity of the butting portion of both strip metal thin plates W1 and W2 A lower jig 4 and upper and lower clamps 5 sandwiching and fixing them from above and below, and a welding device 7 provided with a welding torch 6 (TIG welding torch) for butt-welding the butted portions of both strip metal thin plates W1 and W2 , A manual type rolling device 8 provided on the net body 2 and rolling the welded portion of both strip-like metal thin plates W1 and W2 to equalize the thickness, hardness and structure of the welded portion, and collecting welding fumes generated during welding And a welding fume recovery device 9 to be removed.

  In FIGS. 1 to 3, 10 is an operation panel, 11 is a display light, 12 is a polishing machine, 13 is a scrap case, 14 is a foot lock, and 15 is a caster.

  The cabinet body 2 is provided with right and left working tables 1 formed in a rectangular shape at an intermediate portion on the front side, and the inside of the cabinet body 2 includes a welding power source device and its control device, a welding gas cylinder and the like Accessories, control devices of the cutting device 3 and the welding device 7 etc. are stored (all are not shown).

  Further, as shown in FIG. 4, the left and right work tables 1 of the cabinet body 2 can be reciprocated along the longitudinal direction of the strip-like metal thin plates W1 and W2 on the upper surface of the box-like table support base 16 whose upper portion is opened. It is disposed, and is reciprocated in the longitudinal direction of the strip-like metal thin plates W1 and W2 by a fluid pressure cylinder (not shown) interposed between the table support base 16 and the work table 1. The table support base 16 is provided horizontally at the front middle portion of the cabinet body 2.

  In FIG. 4, reference numeral 17 is movably provided on the back side of the table support 16 via a fluid pressure cylinder (not shown) so as to be movable up and down. Liftable left and right work clamps for holding and fixing the starting end of the head to the upper surface of the left and right work table 1, 18 is inserted and supported in the guide holes 1a formed in the left and right work table 1, fluid pressure cylinder (not shown) And reciprocates in the width direction of the strip metal thin plates W1 and W2, and abuts on the front side edge of the end of the preceding strip metal thin plate W1 and on the front side edge of the start of the trailing strip metal thin plate W2. Movable side pressing member for pressing both strip metal thin plates W1 and W2 to the left and right work clamp 17 side, 19 is provided at the back side portion of the table support base 16 and the back of the end portion of the preceding strip metal thin plate W1 A positioning stopper for positioning the side edges and in contact with both metal band sheet W1, W2 to the rear side of the side edge of the starting end of the strip-shaped metal sheet W2 of the trailing fixed position regardless of its width.

  The cutting device 3 is disposed between the left and right work tables 1 as shown in FIGS. 4 and 5 and is provided in a central portion of the table support 16 so as to pass through the base plate 16 a of the table support 16. The left and right fixing bases 20 disposed on the upper surface of the opening peripheral edge of the through hole (not shown) formed in the upper surface and fixed to the upper surface of the base plate 16a in a standing posture The left and right fixed blades 21 fixed in a posture along the width direction of the thin metal plates W1 and W2 and the upper half side are fixed between the left and right fixing bases 20 through the through holes of the base plate 16a. The frame base 22 located on the lower side of the opening peripheral edge of the through hole of the base plate 16a, and the end part of the preceding strip metal sheet W1 and the strip metal sheet W2 behind it Insertion hole 23 into which the start end of each is inserted And fixed to the upper edge side of the inner peripheral edge portion of the insertion hole 23a of the movable plate 23 in a posture along the width direction of the strip-like metal thin plates W1 and W2, and cooperation with the left and right fixed blades 21 It is connected to the left and right movable blade 24 which cuts together the end of the preceding strip metal thin plate W1 and the start of the trailing strip metal thin plate W2 along the width direction, and the lower end of the movable plate 23 A pair of connecting shafts 25 vertically vertically inserted into the lower end of the platform 22 in a vertical posture, a tip block 26 connecting the lower ends of the pair of linking shafts 25, and the lower surface of the frame 22 and the tip block 26 Between the frame 22 and the front end block 26, and provided between the frame base 22 and the end block 26. The return compression coil biases the movable plate 23 upward. The spring 28 and the plate 22 are Attached is provided with a locking fluid pressure cylinder 30 having a locking pin 30a of locking positions in the lowered movable plate 23, and a fixed blade reinforcing brackets 31 attached to the right and left fixing base 20.

  Further, in the movable plate 23 to which the movable blades 24 on the left and right sides are attached, a part of the insertion hole 23a is positioned on the conveying line of the strip metal thin plates W1 and W2 by the elastic force of the return compression coil spring 28 Lifting position (position shown in FIG. 4 and FIG. 5) where the end portion and the start end portion of the strip-like metal thin plates W1 and W2 can be inserted inside and the movable plate 23 whole is the left and right working table 1 A lower position (not shown) located below the upper surface can be taken.

  Thus, according to the cutting device 3, the end portion of the preceding strip metal thin plate W1 and the start end portion of the trailing strip metal thin plate W2 are in the raised position while being in contact with the left and right fixed blades 21 respectively. By inserting the movable plate 23 and the left and right movable blades 24 into the insertion hole 23a of the movable plate 23 and lowering the movable plate 24 and the left and right movable blades 24 from the raised position to the lowered position by the fluid pressure cylinder 27, the left and right movable blades 24 are fixed. The end and the start of the strip metal sheets W1 and W2 can be cut together along the width direction between the blade 21 and the movable plate 23 by operating the lock hydraulic cylinder 30. The movable plate 23 can be returned to the raised position from the lowered position by the elastic force of the return compression coil spring 28 when it can be locked in the lowered position and the lock fluid pressure cylinder 30 is inactivated. It has become to so that.

  The lower jig 4 is provided on the upper end portion of the movable plate 23 of the cutting device 3 as shown in FIG. 4 and FIG. 5, and a butt between both strip metal thin plates W1 and W2 with the left and right upper clamps 5. The part near the part is held and fixed.

Specifically, the lower jig 4 is formed of a copper material in a prismatic shape, and comprises a back bar inserted and fixed in a recess formed on the upper end surface of the movable plate 23 of the cutting device 3. A gas groove 4a through which a shield gas such as argon gas flows when welding the thin metal plates W1 and W2, and a gas hole 4b supplying the shield gas into the gas groove 4a are formed. The lower jig 4 absorbs excess heat when butt welding the butt portions of both strip-like metal thin plates W1 and W2 so that the beads are melted down or punctured, and thermal distortion of both strip-like metal thin plates W1 and W2 is In addition to the prevention, the shield gas is allowed to flow to the back side of the butting portion of both strip-like metal thin plates W1 and W2 to prevent the oxidation of the welded portion.
Reference numeral 32 denotes an end block fixed to both ends of the upper end portion of the movable plate 23.

  The left and right upper clamps 5, as shown in FIGS. 6 to 9, are provided on an upper and lower movable upper frame 46 of the welding device 7 horizontally moved in the width direction of the strip metal thin plates W1 and W2. The postures along the width direction of W1 and W2 are disposed opposite to each other with a predetermined gap, and the acute-angled tip end portions respectively abut on the upper surface in the vicinity of the abutting portions of both strip metal thin plates W1 and W2 It has become. The upper clamps 5 on the left and right mainly interrupt the spread of the arc when welding the butting portions of the both band-shaped metal thin plates W1 and W2 and concentrate the arc energy on the butt portions of the both band-shaped metal thin plates W1 and W2 It is something to give.

  Specifically, the left and right upper clamps 5 are formed of a copper material in a long plate shape longer than the widths of the both strip-shaped metal thin plates W1 and W2, and one upper clamp of the left and right upper clamps 5 is formed. 7 (the upper clamp 5 on the right in FIG. 7) can be moved and adjusted in the longitudinal direction of the strip metal thin plates W1 and W2 so that the distance between the left and right upper clamps 5 can be finely adjusted, and the other upper clamp 5 (FIG. 7) So that the upper clamp 5) on the left side can be swung up and down, and the tip of the upper clamp 5 is elastically brought into contact with the upper surface of one of the strip metal thin plates W1 and W2 by a plurality of pressure springs 40. There is.

That is, as shown in FIG. 6 to FIG. 8, one upper clamp 5 has a horizontal attitude on the adjustment base 33 mounted horizontally movably in the longitudinal direction of the strip metal thin plates W1 and W2 on the lower surface of the upper frame 46 of the welding device 7. Fixed so as to move horizontally in the longitudinal direction of the strip metal thin plates W1 and W2 by moving and adjusting the adjustment base 33 by the clamp width adjusting mechanism 34 provided between the upper frame 46 and the adjustment base 33. It has become.
Therefore, by moving one of the upper clamps 5 horizontally, it is possible to adjust the distance between the left and right upper clamps 5 in accordance with the thickness of the butted metal sheets W1 and W2 to be butt-welded.

The clamp width adjusting mechanism 34 is, as shown in FIG. 7, an adjustment fitting 35 fixed on the upper surface of the adjustment base 33, and an attitude in a state embedded in the adjustment fitting 35 and along the longitudinal direction of the strip metal thin plates W1 and W2. It is rotatably supported, and its tip is interposed between the adjustment bolt 36 screwed to the upper frame 46, and between the upper frame 46 and the adjustment bracket 35, and serves to prevent the adjustment bolt 36 from being loosened and the adjustment base 33 And a compression coil spring 37 for urging one upper clamp 5 away from the other upper clamp 5, and when adjusting bolt 36 is rotated forward or backward, each adjusting bolt 36 makes one rotation. The adjustment fitting 35 and the adjustment base 33 move in the longitudinal direction of the both strip metal thin plates W1 and W2 by the pitch of the screw formed on the adjustment bolt 36.
Accordingly, the one upper clamp 5 fixed to the lower surface of the adjustment base 33 also moves in the longitudinal direction of the both strip metal thin plates W1 and W2, and the gap between the left and right upper clamps 5 is adjusted.

  On the other hand, as shown in FIG. 7, the other upper clamp 5 is vertically fixed by a fixing base 38 fixed to the lower surface of the upper frame 46 of the welding device 7 by a clamp mounting bolt 39 inserted from the lower surface side of the upper clamp 5 to the upper clamp 5 By means of a plurality of pressure springs 40 (compression coil springs), which are mounted so as to be pivotable in the direction, and which are disposed between the fixed base 38 and the other upper clamp 5 and along the longitudinal direction of the upper clamp 5 The tip portion which is urged downward and has an acute angle is resiliently brought into contact with the upper surface in the vicinity of the butting portion of one of the strip-like thin metal plates W1 and W2.

  According to the left and right upper clamps 5, one of the left and right upper clamps 5 can be moved in the longitudinal direction of the strip metal thin plates W1 and W2 so that the distance between the left and right upper clamps 5 can be adjusted. The other upper clamp 5 can be swung in the vertical direction, and the tip of the upper clamp 5 is elastically brought into contact with the upper surface of one of the strip-like thin metal plates W1 and W2W by the pressure spring 40. Therefore, when the upper clamp 5 and the lower jig 4 sandwich the band metal thin plates W1 and W2 in the vertical direction, the lower end of the upper clamp 5 is used as a reference. The other upper clamp 5 can press the strip metal thin plates W1 and W2 uniformly by the action of the pressure spring 40.

  The welding device 7 has a standby position (backwardly stored in the cabinet body 2) located at the upper rear of the work table 1 and a welding operation position (bi-strip metal strip W1 located above the work table 1 and the cutting device 3). , W2) in the width direction of the strip-like metal thin plates W1 and W2), and is pulled forward when the two strip-like metal thin plates W1 and W2 are butt-welded. The welding torch is linearly moved along the abutting portions of the two thin metal strips W1 and W2 at a predetermined speed.

  That is, as shown in FIGS. 6 to 9, the welding device 7 has the upper base 41 in a horizontal posture disposed in the cabinet main body 2 and the upper surface of the upper base 41 with the linear metal plates W1 and W2 through the linear guide 42. A movable base 43 supported so as to reciprocate in the width direction, a cylinder base 44 provided on the upper surface of the movable base 43, a portal frame 45 disposed on the upper surface of the cylinder base 44, and an upper surface of the portal frame 45 The upper frame 46 is provided on the upper frame 41, and the movable base 43, the cylinder base 44 and the portal frame 45 are reciprocally moved in the width direction of the strip metal thin plates W1 and W2 A gateless frame 47 and an upper portion are interposed between a rodless cylinder 47 for reciprocally moving between a standby position and a welding operation position, a cylinder base 44 and a portal frame 45. A fluid pressure cylinder 48 supporting the frame 46 so as to move up and down, a torch traveling table 50 supported so as to reciprocate in the width direction of the strip metal thin plates W1 and W2 on the upper surface of the upper frame 46 via the linear guide 49 The torch upper and lower arm 51, which is positioned in the frame 46 and supported movably up and down on the torch carriage 50, is attached to the tip of the torch up and down arm 51, and shield gas flows from the tip and the tungsten electrode bar Torch vertical motor 52 and ball screw mechanism 53 provided on the welding torch 6 and the torch traveling table 50 for moving the torch vertical arm 51 and the welding torch 6 up and down, the torch traveling platform 50 and the welding torch 6 includes a torch back-and-forth motor 54 and a belt transmission mechanism 55 that reciprocate the belt 6 in the width direction of the both strip metal thin plates W1 and W2 That.

  The rolling device 8 has a structure similar to that of a conventionally known one, and thus the detailed description thereof is omitted here.

As shown in FIGS. 1 to 3 and 10, the welding fume recovery device 9 covers the periphery of the welding torch 6 that reciprocates along at least the abutting portions of the two thin metal strips W1 and W2, and is generated during the welding operation. Cover 56, a welding fume suction hood 57 disposed in the safety cover 56, and a welding fume suction hood 57 in the inner space of the safety cover 56. A vacuum generator 59 is connected in communication via a suction pipe 58, and a welding fume collector 60 which is interposed in the middle of the suction pipe 58 and collects welding fumes sucked together with air by the vacuum generator 59. Is equipped.
Of course, the suction hose 58 may be used instead of the suction pipe 58.

  Specifically, the safety cover 56 is formed in the shape of a box in which the lower surface and the back surface are open, and a part of the upper wall and the front wall is from outside the safety cover 56 closed at the time of the welding operation. It is formed of a transparent plastic plate 56a so that the inside can be confirmed.

  Further, the safety cover 56 is formed in a size to cover the peripheral space of the welding torch that reciprocates along the butting portion of the both strip-like metal thin plates W1 and W2 and the entire upper surface of the left and right working table 1 The front wall of the cover 56 has a handle 56b for opening and closing the safety cover 56, and a suction hole for sucking outside air into the safety cover 56 so that the inside of the safety cover 56 does not become vacuum. 56c are provided respectively.

The rear end portion of the upper wall of the safety cover 56 is attached to the angle member 61 fixed in a horizontal posture to the front wall front of the cabinet body 2 through the hinge 62, and the lower end of the safety cover 56 is Are closed positions where the rear end of the safety cover 54 abuts on the front wall front surface of the cabinet body 2 (the solid line shown in FIGS. 1 and 2) Position) and the open position where the safety cover 56 is pivoted upward (the position indicated by the alternate long and short dash line in FIG. 2).
In FIG. 1, reference numeral 63 denotes an air damper interposed between the cabinet body 2 and the safety cover 56.

  The vacuum generator 59 is provided in the cabinet body 2, and a suction pipe 58 (or a suction hose 58) is provided to a welding fume suction hood 57 provided on the front wall front of the cabinet body 2 and at a position near the welding torch 6. Connected via). For the vacuum generator 59, a vacuum ejector, a vacuum pump or a vacuum blower is used.

The welding fume recovery unit 60 is provided in the middle of the suction pipe 58 (or suction hose 58) and has an air inlet 60a and an air outlet 60b, and the air is drawn tangentially from the air inlet 60a. , A dust case 60B detachably mounted on the collecting body 60A for removing welding fumes separated from air by the cyclone effect, and the inside of the collecting body 60A. And a filter 60C disposed in the dust case 60B for removing welding fumes not separated from the air by the cyclone effect. The two welding fume recovery devices 60 are attached to the side of the cabinet body 2 for easy maintenance.
As a material of the filter, non-woven fabric made of chemical fiber, metal fiber, porous ceramics, etc. are used.

  According to the welding fume recovery device 9, when welding is performed with the vacuum generator 59 in operation, the welding fumes in the safety cover 56 generated at the time of the welding operation are welded fumes together with air. The air is aspirated from the suction hood 57 and flows into the welding fume recovery device 60 through the suction pipe 58 (or the suction hose 58).

  The air flowing into the welding fume recovery unit 60 and the welding fumes are given a swirling motion in the welding fume recovery device 60, and the relatively large welding fumes are separated from the air by the centrifugal force generated by the swirling motion, and the dust case It will accumulate in the bottom of 60B. As a result, relatively large welding fumes are collected in the dust case 60B.

  The air from which relatively large welding fumes have been separated is subsequently discharged from the welding fume collector 60 through the filter 60C. At this time, relatively small welding fumes in the air not separated by the cyclone effect are removed by the filter 60C.

  The air from which the welding fumes are recovered and removed flows into the vacuum generator 59 through the suction pipe 58 (or the suction hose 58) and is released to the atmosphere.

  Next, the case where the preceding strip metal thin plate W1 and the trailing strip metal thin plate W2 are joined by butt welding using the above-described butt welding apparatus for strip metal thin plates will be described.

  First, the safety cover 56 in the closed position is opened to the open position, and the end of the preceding strip metal sheet W1 is placed on the right work table 1, and the back side edge of the preceding strip metal sheet W1 And the end of the preceding strip metal thin plate W1 is inserted into the insertion hole 23a of the movable plate 23 in the raised position of the cutting device 3, and in this state the right work table The movable side pressing member 18 is moved toward the work clamp 17 on the right side by a fluid pressure cylinder (not shown). Then, the end of the preceding strip metal thin plate W1 is pushed to the right side of the work clamp 17, and the back side edge of the preceding strip metal thin plate W1 abuts on the positioning stopper 19 and the end of the preceding strip metal thin plate W1 The part is positioned.

  The work clamp 17 on the right side is operated in the above state, and the end of the preceding strip metal thin plate W1 is closely held and fixed on the upper surface of the work table 1 on the right side by the work clamp 17 on the right.

  In addition, the end of the trailing strip metal thin plate W2 is placed on the left working table 1, and the rear side edge of the trailing strip metal thin plate W2 is inserted below the left work clamp 17 and The end of the strip of thin metal plate W2 in the row is inserted into the insertion hole 23a of the movable plate 23 at the raised position of the cutting device 3, and in this state, the movable side pressing member 18 of the work table 1 on the left side It moves to the work clamp 17 side on the left side according to (omitted). Then, the end of the trailing strip metal thin plate W2 is pushed to the left work clamp 17 side, and the back side edge of the trailing strip metal thin plate W2 abuts on the positioning stopper 19 and the trailing strip metal strip The end of W2 is positioned.

  The work clamp 17 on the left side is operated in the above state, and the end of the trailing strip metal thin plate W2 is closely held and fixed on the upper surface of the work table 1 on the left side by the work clamp 17 on the left.

  When the end of the preceding strip metal sheet W1 and the start of the trailing strip metal sheet W2 are held and fixed to the left and right work tables 1, the cutting device 3 is operated to move the movable plate 23 in the raised position to the fluid pressure cylinder Lower to lower position by. Then, the end of the preceding strip metal thin plate W1 and the start of the trailing strip metal thin plate W2 are cut together along the width direction by the cooperative action of the left and right movable blades 24 and the left and right fixed blades. . Incidentally, the movable plate 23 of the cutting device 3 is locked at the lowered position by the locking fluid pressure cylinder after cutting and processing both strip-like metal thin plates W1 and W2.

  When the end portion of the preceding strip metal thin plate W1 and the start end portion of the trailing strip metal thin plate W2 are cut along the width direction, the left and right work tables 1 move in the direction approaching by the fluid pressure cylinder (not shown) The cut end of the preceding strip-shaped metal sheet W1 and the cut-off start end of the trailing strip-shaped metal sheet W2 are butted in close contact with each other.

  When the end of the leading strip W1 and the beginning of the trailing strip W2 are butted, the safety cover 56 in the open position is closed to the closing position, and the upper frame 46 of the welding device 7 is rodless. The cylinder is advanced from the standby position to the welding operation position, and the left and right upper clamps 5 are moved to the upper position of the butting portion of both strip metal thin plates W1 and W2. In this state, the portal frame 45 and the upper frame 46 are lowered by a fluid pressure cylinder, and the vicinity of the butting portion of both strip metal thin plates W1 and W2 is provided at the upper end of the left and right upper clamps 5 and the movable plate 23 of the cutting device 3 Hold and fix with lower jig 4.

  When the vicinity of the butting portion of the both strip-shaped metal thin plates W1 and W2 is clamped from above and below by the upper clamp 5 and the lower jig 4 on the left and right, the height of the welding torch 6 of the welding device 7 is automatically adjusted, An arc is generated between the tungsten electrode tip of the welding torch 6 and one end block 32. When the arc is stabilized, the torch carriage 50 moves in the width direction of the strip metal thin plates W1 and W2 in this state, and butt welds the butt portions of the both strip metal thin plates W1 and W2 by the welding torch 6.

  At this time, the vacuum generator 59 of the welding fume recovery device 9 is activated, and the welding fumes generated during the welding operation are recovered and removed, so that the operator does not suction the welding fumes during the welding operation, As well as being excellent in safety, it is not said that the generated welding fume adheres to the welded portion of the strip-like metal thin plates W1 and W2, and there is no need to perform post-treatment such as cleaning of the welded portion.

  When the butt welding of the butt portions of both strip metal thin plates W1 and W2 is completed, the portal frame 45 and the upper frame 46 are raised by the hydraulic cylinder, and the upper frame 46 of the welding device 7 is welded by the rodless cylinder 47 Move back to the standby position from. Further, the movable side pressing plates of the left and right work tables 12, 2 are moved in a direction away from the left and right work clamps 17 by a fluid pressure cylinder (not shown), and the left and right work clamps 17 are raised. As a result, the butt-welded both strip metal thin plates W1 and W2 become free.

  In the free state, the welded portion is rolled by the manual rolling device 8 to make the thickness, hardness, and structure of the welded portion uniform.

  In the above embodiment, two welding fume recovery devices 60 are interposed in series along the suction pipe 58 (or suction hose 58), but in another embodiment, the suction pipe 58 (or suction) Only one welding fume recovery unit 60 may be interposed in the middle of the hose 58), or three or more welding fume recovery units 60 may be interposed in series in the middle of the suction pipe 58 (or suction hose 58). You may.

  1 is a work table, 2 is a cabinet body, 5 is an upper clamp, 6 is a welding torch, 7 is a welding device, 9 is a welding fume recovery device, 46 is an upper frame, 56 is a safety cover, 58 is a suction pipe or suction Hose, 59 is a vacuum generator, 60 is a welding fume recovery unit, 60B is a dust case, 60C is a filter, W1 is a leading strip metal sheet, and W2 is a trailing strip metal sheet.

Claims (5)

A cabinet body (2) provided with a work table (1) for supporting and placing the end of a leading strip metal thin plate (W1) cut along the width direction and the beginning of a trailing strip metal thin plate (W2) And pressing the vicinity of the butting portion of both strip-like thin metal plates (W1) and (W2) from above in a state where the end of the preceding strip-like thin metal plate (W1) and the start of the following strip-like thin metal plate (W2) are butted Welding apparatus provided with a welding torch (6) for reciprocating along the butt joints of the left and right upper clamps (5) and the two band-like metal thin plates (W1) and (W2) (7) In the butt-joining apparatus for strip-shaped metal thin plates, the butt-joining apparatus includes a welding fume recovery apparatus (9) for recovering and removing welding fumes generated at the time of welding , the welding fume recovery apparatus 9) The work space (1) and the surrounding space of the welding torch (6) which is attached to the front of the net body (2) so as to be openable and closable and reciprocates along the abutting portions of the both strip metal thin plates (W1) and (W2) A safety cover (56) that covers the entire top surface and prevents welding fumes generated during welding from leaking to the outside, and is provided in the cabinet body (2), and a suction pipe is formed in the inner space of the safety cover (56) (58) or a vacuum generator (59) connected in communication via a suction hose (58), attached to the side of the cabinet body (2), and in the middle of the suction pipe (58) or the suction hose (58) And a welding fume recovery unit (60) for recovering welding fumes sucked together with air by a vacuum generator (59) . A welding fume suction hood (57) is disposed in the safety cover (56) and in the vicinity of the welding torch (6), and a suction pipe (58) or a suction hose (58) is attached to the welding fume suction hood (57). ) butt joint device of the band-shaped sheet metal according to claim 1, characterized in that the connecting.   3. The apparatus according to claim 2, wherein a plurality of welding fume recovery devices (60) are connected in series in the middle of the suction pipe (58) or the suction hose (58).   The welding fume recovery unit (60) has a cyclone structure that separates the air drawn by the vacuum generator (59) and the welding fume by a cyclone effect, and recovers the welding fume separated from the air by the cyclone effect. The butt welding of strip metal thin plates according to claim 2 or 3, comprising a dust case (60B) and a filter (60C) for removing welding fumes not separated from air by a cyclone effect. Bonding device. The welding device (7) is formed of strip-like metal thin plates (W1) and (W2) between a standby position located at the upper rear of the work table (1) and a welding operation position located above the work table (1). An upper frame (46) reciprocably movable in the width direction is provided, and the upper frame (46) is provided with left and right upper clamps (5), and the upper frame (46) is a hydraulic cylinder (48) The upper frame (46) is lowered by one fluid pressure cylinder (48), and the upper and lower clamps (5) move the upper and lower clamps (5) around the butting portion of the strip metal sheets (W1) and (W2) from above The butt welding apparatus according to claim 1, characterized in that the pressing is performed.

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