JP2009279604A - Butt welding equipment for belt-like workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To block arc light during butt welding of a belt-like workpiece (the workpiece), to have a constantly fixed position for welding start position of the workpiece or rolling start position of a weld zone of the workpiece regardless of the width of the workpiece, and to surely and satisfactorily perform rolling of the weld zone of the workpiece. <P>SOLUTION: Butt welding equipment for the workpiece includes: right and left tables 2, 2 that fixedly clamp a preceding and a succeeding workpiece W1, W2 to make end faces abut on each other; a cutting device 3 for simultaneously cutting both workpieces W1, W2; welding device 5 for butt-welding both workpieces W1, W2; and a rolling apparatus 6 for rolling the weld zone of both workpieces W1, W2. The welding device 5 comprises: an upper frame 35 that freely reciprocates back and forth; a torch travelling base 38 which is arranged on the upper frame 35, and freely reciprocates in the width direction of the workpieces W1, W2; a welding torch 39 that is supported in a freely vertically movable manner on the torch travelling base 38; and a torch cover 42 which is attached to the torch travelling base 38 in a manner covering the welding torch 39 and which blocks the arc light. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is applied to a press line that continuously produces various products such as lead frames, connectors, chassis, etc. from a strip-shaped workpiece made of a metal plate such as stainless steel, iron, copper, and aluminum wound in a coil shape. The present invention relates to an improvement in a butt-joining apparatus for a strip-shaped workpiece in which the tip of a subsequent strip-shaped workpiece is joined to the rear end of a preceding strip-shaped workpiece that is installed and flowing on a line by butt welding. When welding the butt, the arc light is shielded to protect the eyes and skin of the worker, and it is related to the width of the band work when butt welding both belt works or rolling the welded parts of both belt works. The welding start position and rolling processing start position are always constant, and the workability and handleability are excellent. However, the belt-shaped workpiece can be reliably and satisfactorily rolled at the welded part of both belt-shaped workpieces. It relates butt joint device.

  In general, in press lines that form and process lead frames, connectors, chassis, etc. while continuously supplying strip-shaped workpieces made of metal plates wound in a coil shape, improvement in productivity and quality are achieved. To stabilize, etc., join the beginning of a new succeeding strip-shaped workpiece to the end of the preceding strip-shaped workpiece fed out on the line by butt welding, and continuously supply the new strip-shaped workpiece to the press line, etc. Has been done.

  In the butt welding of the belt-like workpiece as described above, high accuracy is required not only for ensuring the mechanical strength of the welded portion but also for the finishing accuracy of the welded portion (for example, the thickness and linearity of the welded portion). This is because, if the finishing accuracy of the welded portion is poor, the press die is damaged, or the quality of the molded product including the welded portion is extremely deteriorated.

  Conventionally, as an apparatus for performing butt welding of a strip-shaped workpiece, a butt-joining apparatus for a strip-shaped metal plate (band-shaped workpiece) disclosed in Japanese Patent Laid-Open No. 2004-34254 (Patent Document 1) previously developed by the present inventor is used. Are known.

  That is, although the butt joining device is not shown, the cutting device is provided in the cabinet body and simultaneously cuts the end portion of the preceding belt-like workpiece and the start end portion of the following belt-like workpiece along the width direction, and the cutting device. It is arranged at the left and right positions of the device so as to be able to reciprocate in the conveying direction of both belt-like workpieces, and holds and fixes the end portion of the preceding belt-like workpiece and the start end portion of the following belt-like workpiece, respectively, The left and right tables that abut end surfaces of each other, the clamping mechanism that clamps and fixes the vicinity of the abutting portion of both belt-like workpieces from above and below, and the reciprocating movement in the front-rear direction at the upper position of the cutting device. It comprises a welding device equipped with a welding torch with a tungsten electrode rod for butt welding the butt portion.

  In this butt joining device, a cutting device that simultaneously cuts the end portion of the preceding belt-like workpiece and the starting end portion of the following belt-like workpiece is disposed at a position directly below the welding device at the welding work position, Since the left and right tables that hold and fix both strip-shaped workpieces at the position and abut the cut ends are arranged, the cut ends of both cut strip-shaped workpieces can be automatically butted and the two strip-shaped workpieces Work cutting and butt welding can be performed continuously at the same position, and the work efficiency can be greatly improved.

However, there are still problems to be solved in the above-described belt-shaped workpiece butt joining apparatus.
That is, in the butt joining apparatus, since the welding torch can be seen from the surroundings, the tungsten electrode rod and the belt-like workpiece inserted into the welding torch when welding the butt portions of both belt-like workpieces, The intense light of the arc generated during the period leaks to the surroundings. As a result, there is a problem that the worker may directly look at the intense light from the arc, causing an obstacle to the eyes of the worker. In particular, arc light is even more problematic because it contains ultraviolet and infrared rays that are harmful to the eyes and skin in addition to intense visible light.

  In this butt joining apparatus, the left and right tables are divided into a front table and a rear table, and both the front table and the rear table are moved closer to each other by the driving device and attached to the upper surface of the front table. Since the belt-like workpiece supported and placed on both tables is held and fixed from the width direction by the front stopper and the rear stopper attached to the upper surface of the rear table, when the width of the belt-like workpiece to be butt welded is changed, The welding start position will inevitably change. As a result, the position of the welding torch has to be reset every time the width of the belt-like workpiece to be butt welded is changed, resulting in poor workability and handling.

Furthermore, since this butt joining device automatically matches the end of the preceding belt-like workpiece and the start end of the succeeding belt-like workpiece with the left and right tables, when performing extremely thin belt-like workpiece matching, There was a problem that the belt-like work would bend. Therefore, this butt joining apparatus is mainly used for butt welding of a strip-shaped workpiece having a plate thickness of 0.2 mm or more.
By the way, when performing butt welding of thick strip-shaped workpieces, since the tensile strength of the welded portion is weak in one welding, the butt portions of both strip-shaped workpieces are welded several times and the beads are overlapped to obtain the thickness of the welded portion. The thickness is increased to increase its strength. As a result, the thickness of the welded portion of both belt-like workpieces is often thicker than the thickness of both belt-like workpieces, and the welded portion of both belt-like workpieces and the vicinity thereof are affected by heat, increasing the hardness, Or there existed problems, such as a structure | tissue worsening and intensity | strength falling.

In order to solve this problem, it is necessary to uniformize the thickness and structure of the welded portion by rolling the welded portion of the strip-shaped workpiece with a rolling device.
However, since the butt joining device does not include a rolling device, the welded portion of the butt-welded strip-shaped workpiece must be rolled by a rolling device at another location, resulting in poor handling and workability. was there.

Incidentally, as a butt-joining device for a strip-shaped workpiece provided with a rolling device, a butt-joint of a strip-shaped metal plate (strip-shaped workpiece) disclosed in Japanese Patent Application Laid-Open No. 11-347792 (Patent Document 2) previously developed by the present inventor. The device is known.
That is, the rolling device of the butt joining device is not shown, but is composed of a receiving plate (rolling table), a rolling roller, and the like. The welding part of the belt-like workpiece is positioned on the receiving plate, and the rolling roller is belt-shaped. By rolling in the front-rear direction along the welded part of the workpiece, the welded part is pressed to make its thickness and structure uniform.

However, since the rolling apparatus rotatably attaches the rolling roller to the front end portion of the support member that reciprocates in the width direction of the strip-shaped workpiece, when the thickness of the strip-shaped workpiece on the receiving plate increases, the rolling roller There was a problem that it was not possible to roll over the welded portion of the steel sheet and the rolling process could not be performed.
In addition, since this rolling machine has a rolling roller rotatably attached to the tip of a support member that reciprocates in the width direction of the belt-like workpiece, the rolling roller is not pressed too strongly on the receiving plate, and the belt-like workpiece is welded. There has also been a problem that the thickness and structure of the welded portion cannot be reliably and satisfactorily uniformed during the rolling of the portion.
JP 2004-34254 A Japanese Patent Laid-Open No. 11-347792

  The present invention has been made in view of such problems, and its purpose is to protect the eyes and skin of workers by shielding arc light when welding the butt portions of both belt-like works. In addition, when butt welding both belt-like workpieces or rolling the welded portion of both belt-like workpieces, the welding start position and rolling start position are always constant regardless of the width of the belt-like workpieces, resulting in excellent workability. However, another object of the present invention is to provide a belt-shaped workpiece butt-joining apparatus capable of reliably and satisfactorily rolling the welded portions of both belt-shaped workpieces.

  In order to achieve the above object, the invention of claim 1 of the present invention is configured to clamp and fix the end portion of the preceding belt-like workpiece and the start end portion of the succeeding belt-like workpiece from the width direction, respectively, The left and right tables that can reciprocate and move up and down in the transport direction of the two strip-shaped workpieces that abut the leading ends of the two strip-shaped workpieces, and the left and right tables are disposed between the left and right tables. A cutting device that simultaneously cuts the starting end of the belt-like workpiece along the width direction, a clamp mechanism that holds and fixes the vicinity of the abutting portions of both belt-like workpieces from above and below, and a reciprocation in the front-rear direction to a position above the abutting portion of the belt-like workpieces A welding device that is movably arranged and butt welds the abutting portions of both belt-like workpieces clamped and fixed by a clamp mechanism, and is arranged at a side position of the downstream table of the left and right tables. A belt-like workpiece butt joining device comprising a manual rolling device that rolls the welded portions of both belt-like workpieces to uniformize the thickness and structure of the welded portion, wherein the welding device is a butt portion of the belt-like workpieces An upper frame that can reciprocate in the front-rear direction over a standby position located behind the belt and a welding work position that is located above the abutting portion of the belt-like workpiece, and can be reciprocated in the width direction of both belt-like workpieces on the upper frame An installed torch platform, a welding torch that is supported by the torch platform, and is automatically adjusted in height with a tungsten electrode rod inserted, and a state in which the welding torch is covered on the torch platform And a torch cover that shields arc light generated during welding.

  According to the second aspect of the present invention, safety covers are attached to both side surfaces of the upper frame so as to be movable up and down, and the safety covers are moved to the left and right when the left and right tables are raised with respect to the upper frame at the welding work position. It is characterized in that it is configured to cover up the gap generated between the upper frame and the left and right tables when the left and right tables are lowered and lowered together with the left and right tables. is there.

  The invention according to claim 3 of the present invention is such that the left and right tables are provided in a fixed state on the back side portion of the table, and contact with the side edge on the back side of the belt-like workpiece so that the belt-like workpiece is fixed at a fixed position regardless of its width. A movable plate and a movable side presser plate, which are disposed on the upper surface of the front part of the left and right tables so as to be reciprocally movable in the width direction of the belt-like workpiece and are in contact with the front side edge of the belt-like workpiece. It is provided with a presser plate drive device that reciprocates in the width direction of the belt-like workpiece, and the movable side presser plate is moved in the direction approaching the reference plate side by the presser plate drive device, and is supported and placed on the left and right tables, respectively. It is characterized in that the end portion of the preceding belt-like workpiece and the start portion of the following belt-like workpiece are clamped and fixed from the width direction by the reference plate and the movable side holding plate with respect to the position of the reference plate. .

  The invention of claim 4 of the present invention is characterized in that a notch portion into which an operator's finger enters is formed in a side edge portion of the movable side pressing plate facing the reference plate.

  The invention of claim 5 of the present invention is such that the rolling device is movable in the vertical direction and can be rotated in the vertical direction at the base of the rolling table on which the welded part of the belt-like workpiece is supported and mounted. The upper part of the rolling which can take the rolling position parallel to the rolling table and the open position where it stands upright with respect to the rolling table, and the upper part of the rolling are supported so as to be able to reciprocate in the width direction of the strip-shaped workpiece. A rolling roller table, a rolling roller that is rotatably supported by the rolling roller table, and rolls on the welded portion of the strip-shaped workpiece supported and mounted on the rolling table when the upper part of the rolling is in the rolling position, and the rolling table and the rolling It is provided between the upper part and is composed of a pressing means that presses the rolling upper part at the rolling position toward the rolling table and abuts the rolling roller to the welded part of the strip-shaped workpiece in a pressurized state. Rolling with pressure applied to the rolling table side by means Is characterized by rolling the longitudinal direction along the over La welds of both the strip-shaped workpiece to weld two strip-shaped workpiece that has been adapted to rolling.

  In the invention of claim 6 of the present invention, the position of the rolling roller base moved to the base end side of the upper part of the rolling is set so that the center of the rolling roller coincides with the side end on the back side of the welded portion of the belt-like workpiece. In addition, a stopper that controls the movement of the rolling roller by being in contact with the rolling roller base moved to the leading end side of the rolling upper part is provided on the leading end side of the rolling upper part so as to be movable and adjustable in the width direction of the strip-shaped workpiece. Is characterized in that it is configured to reciprocate on the welded portion of the belt-like workpiece.

  The invention according to claim 7 of the present invention is characterized in that a scale for facilitating positioning of the stopper is provided at the upper part of the rolling.

  Since the welding apparatus includes a torch cover that covers the welding torch, the arc light is generated by the torch cover when butt welding the butt portion of the band work. It will be shielded so that the worker can safely perform welding without directly looking at the intense light from the arc or being exposed to ultraviolet rays or infrared rays harmful to eyes and skin.

In addition to the above effects, the belt-like workpiece butt joining apparatus according to claims 2 to 7 of the present invention can further exhibit the following effects.
That is, the belt-like workpiece butt joining apparatus according to claim 2 of the present invention is configured such that a safety cover is attached to the upper frame of the welding apparatus so as to be movable up and down, and when the left and right tables are moved up and down by the safety cover, Since the gap formed between the left and right tables is covered, the operator does not accidentally put a finger or the like, and the welding operation can be performed more safely.

According to a third aspect of the present invention, the belt-shaped workpiece butt-joining apparatus abuts the side edges on the back side of the belt-like workpieces at the back side portions of the left and right tables, and positions the belt-like workpieces at a fixed position regardless of the width. A reference plate is provided, and a movable presser plate that contacts the front side edge of the belt-like workpiece is arranged on the upper surface of the front part of the left and right tables so as to be reciprocally movable in the width direction of the belt-like workpiece. Since the belt-like workpiece is clamped and fixed from the width direction by the side pressing plate, the belt-like workpiece is clamped and fixed from the width direction on the basis of the position of the reference plate regardless of the width. As a result, the welding start position is always the same regardless of the width of the belt-like workpiece, and the workability and the handleability are excellent.
Further, the belt workpiece butt joining apparatus according to claim 3 of the present invention is configured such that only the movable holding plate is moved to the reference plate side, and the both belt workpieces supported and placed on the left and right tables are clamped and fixed from the width direction. Therefore, like the conventional butt joining device, the left and right tables are divided into a front table and a rear table, and both the front table and the rear table are reciprocated in the width direction of the belt-like workpiece by the driving device. The structure can be simplified and the cost can be reduced as compared with the above.

  The belt-shaped workpiece butt-joining apparatus according to claim 4 of the present invention is formed with a notch portion into which the operator's finger enters at the side edge portion of the movable side pressing plate facing the reference plate. When holding and fixing the workpiece from the width direction with the reference plate and the movable side presser plate, if both belt-like workpieces are pressed against the left and right table sides with fingers so that the fingers enter the notch of the movable side presser plate, Even if the movable side presser plate is close to the reference plate, the operator can safely set the belt-like work without having the operator pinch his / her finger between the reference plate and the movable side presser plate.

The belt-like workpiece butt-joining apparatus according to claim 5 of the present invention has a rolling roller table and a rolling upper portion provided with a rolling roller at the base end portion of the rolling table on which the welded portions of both band-shaped workpieces are supported and placed in the vertical direction. Since it is configured to be movable and turnable in the vertical direction, the upper part of the rolling is pressed to the rolling table side by pressing means, and the rolling roller is in contact with the welded portion of the band-shaped workpiece in a pressurized state. During the rolling process of the welded part of the workpiece, the welded part can be rolled surely and satisfactorily, and the thickness and structure of the welded part can be made uniform reliably and satisfactorily.
Further, in the belt-like workpiece butt joining apparatus according to claim 5 of the present invention, the rolling upper portion provided with the rolling roller is attached to the base end portion of the rolling table so as to be movable in the vertical direction and to be rotatable in the vertical direction. Since it is possible to take a rolling position that is parallel to the table and an open position that is in an upright position with respect to the rolling table, even if the thickness of the strip-shaped workpiece is thick, the rolling roller is used as the welded portion of the strip-shaped workpiece. It can be mounted reliably, and rolling can be performed reliably.

The belt-like workpiece butt-joining apparatus according to claim 6 of the present invention is such that the position of the rolling roller base moved to the base end side of the upper part of the rolling is aligned with the side end of the rear side of the welding part of the belt-like work. In addition, the stopper that controls the movement of the rolling roller by contacting the rolling roller base moved to the leading end side of the rolling upper part can be adjusted in the width direction of the belt-like work. Since the rolling roller is configured to reciprocate on the welded portion of the strip-shaped workpiece, the rolling roller does not roll off from the welded portion of the strip-shaped workpiece, and reciprocates only on the welded portion of the strip-shaped workpiece. It will be. As a result, the rolling process of the welded portion of the belt-like workpiece can be performed reliably and satisfactorily.
According to a sixth aspect of the present invention, there is provided a belt-like workpiece butt-joining apparatus in which the position of the rolling roller base moved to the base end side of the upper part of the rolling is set to the side end of the center of the rolling roller on the back side of the welding part of the belt-like work. Therefore, the rolling processing start position is always the same regardless of the width of the belt-like workpiece, and the workability and the handleability are excellent.

  The belt-like workpiece butt-joining apparatus according to claim 7 of the present invention is provided with a scale for facilitating positioning of the stopper at the upper part of the rolling, so that even when the width of the belt-like workpiece to be rolled changes, the stroke of the rolling roller can be changed. It can be adjusted easily and easily.

  FIG. 1 shows a butt-joining apparatus for strip-like workpieces according to an embodiment of the present invention. The butt-joining apparatus includes a lead frame or the like from strip-like workpieces W1, W2 made of stainless steel, iron, copper or the like wound in a coil shape. It is installed in a press line that continuously produces various products such as chassis, and the starting end of a new succeeding strip-shaped workpiece W2 is joined by butt welding to the end of the preceding strip-shaped workpiece W1 flowing on the line. The new succeeding belt-like workpiece W2 can be supplied on the line following the preceding belt-like workpiece W1.

  That is, as shown in FIGS. 1 to 4, the butt-joining apparatus for the belt-like workpieces holds and fixes the cabinet body 1 and the end portion of the preceding belt-like workpiece W1 and the start end portion of the following belt-like workpiece W2 from the width direction. And the left and right tables 2 and 2 for abutting the cut end of the preceding belt-like workpiece W1 and the cut start end of the following belt-like workpiece W2; A cutting device 3 that simultaneously cuts the starting end portion of the workpiece W2 along the width direction, a clamp mechanism 4 that clamps and fixes the vicinity of the abutting portion of both the strip-like workpieces W1 and W2 from above and below, and the abutting portion of both the strip-like workpieces W1 and W2 Is composed of a welding device 5 for butt welding and a manual rolling device 6 for rolling the welded portion of both belt-like workpieces W1 and W2, and the like. It is one that is suitable for the case.

As shown in FIG. 1, the cabinet body 1 has a plurality of casters 7 and support legs 8 on the bottom side, and is provided with an intermediate plate 1a (see FIGS. 4 and 6) in a horizontal position at an intermediate portion. A touch panel 9 that displays welding current, welding speed, and the like, various switches 10, and the like are disposed at the upper position on the front side of the main body 1.
Further, inside the cabinet body 1, there are control devices such as a welding power supply device and its control device (all not shown), a welding gas cylinder and its accessories (all not shown), a cutting device 3 and a welding device 5. (Not shown) and the like are stored.

  The left and right tables 2 and 2 are reciprocally movable in the transporting direction of the strip-like workpieces W1 and W2 to the left and right positions of the cutting device 3 disposed at the center in the width direction of the intermediate plate 1a of the cabinet body 1, and are movable up and down, respectively. It is disposed, and the end portion of the preceding belt-like workpiece W1 and the starting end portion of the new succeeding belt-like workpiece W2 are supported and mounted from the width direction, and the belt-like workpieces W1, W2 are cut. The end faces are automatically matched.

That is, the left and right tables 2 and 2 are formed in a substantially rectangular shape as shown in FIGS. 2 and 3, and a plurality of guide holes along the width direction of the strip-like workpieces W1 and W2 are formed in the intermediate portion and both end portions. 2a is formed.
In addition, at the position closer to the front side of the opposing side edges of the left and right tables 2 and 2, there is a protruding piece 2 b that always overlaps regardless of the movement of the strip-like works W 1 and W 2 of the left and right tables 2 and 2 in the width direction. Each is formed and devised so that there is no gap at the front side position between the left and right tables 2, 2 even if the left and right tables 2, 2 move in the approaching or separating direction . As a result, the operator does not squeeze his / her fingers between the left and right tables 2 and 2, and safety is ensured.

As shown in FIGS. 4 and 6, the left and right tables 2 and 2 are lifted up and down supported on the upper surface side of the intermediate plate 1a of the cabinet body 1 through a plurality of vertical support shafts 11. By moving the plurality of fluid pressure cylinders 13 fixed to the intermediate plate 1a and interlockingly connected to the lifting platform 12 to extend and contract, the table 12 moves up and down together with the lifting platform 12. Yes.
The elevating platform 12 has a horizontally long rectangular base plate 12a in which a rectangular through hole 12a 'into which a part of the cutting device 3 is inserted is formed at the center, and a vertical posture at the front end of the base plate 12a. And a side plate 12c fixed in a vertical posture at both ends of the base plate 12a.

Further, as shown in FIGS. 4 and 6, the left and right tables 2 and 2 are supported on the upper surface of the base plate 12a of the lifting platform 12 through the guide rails 14 so as to be reciprocally movable in the conveying direction of the strip-like workpieces W1 and W2. The belt-like workpieces W1, W1 and W2 are respectively disposed on the left and right moving bases 15 by extending and contracting the fluid pressure cylinders 16 interposed between the left and right side plates 12c of the elevator 12 and the left and right moving bases 15, respectively. It moves back and forth in the conveyance direction of W2.
The left and right moving bases 15 include a planar U-shaped moving plate 15a supported on a guide rail 14 provided on the upper surface of the base plate 12a of the lifting platform 12 so as to be movable in the conveying direction of the strip-like workpieces W1 and W2. The front side plate 15b is fixed to the front side end of the plate 15a in a vertical posture, and the back side plate 15c is fixed to the back side end of the moving plate 15a in a vertical posture.

  Further, as shown in FIGS. 2, 3, 4 and 6, the left and right tables 2 and 2 are in contact with the side edges on the back side of the strip-like workpieces W1 and W2, and the strip-like workpieces W1 and W2 are related to the width thereof. A reference plate 17 that is positioned at a fixed position, a movable side presser plate 18 that is in contact with the front side edge of the strip-like workpieces W1 and W2 and can be reciprocated in the width direction of the strip-like workpieces W1 and W2, and a movable side presser plate And a presser plate drive device 19 for reciprocating the belt 18 in the width direction of the belt-like workpieces W1 and W2, respectively. The movable side presser plate 18 is moved by the presser plate drive device 19 toward the reference plate 17 side. The reference plate 17 and the movable side presser plate with respect to the position of the reference plate 17 with respect to the end portion of the preceding belt-like workpiece W1 and the starting end portion of the following belt-like workpiece W2 supported and mounted on the left and right tables 2 and 2, respectively. 18 by squeezing with 18 , So that it can be clamped fixing the W2 in the width direction.

  Specifically, as shown in FIGS. 2, 3, and 6, the reference plate 17 is formed in a thick and long plate shape, and is fitted into the back end portions of the left and right tables 2 and 2. It is being fixed to the upper surface of the back | inner side board 15c of the right-and-left moving stand 15 with the volt | bolt. The reference plate 17 serves as a reference position at the start of welding by the welding device 5 and a reference position at the start of rolling by the rolling device 6.

  In addition, as shown in FIGS. 2, 3, and 6, the movable side pressing plate 18 is formed in a long plate shape, and a plurality of workers' fingers can be inserted into the side edge portion facing the reference plate 17. And a plurality of protrusions 18b inserted into the plurality of guide holes 2a formed in the left and right tables 2 and 2 are formed on the lower surface side thereof. The movable-side presser plate 18 has a plurality of protrusions 18b on the lower surface side inserted into the guide holes 2a of the left and right tables 2 and 2, so that the widthwise direction of the strip-like workpieces W1 and W2 is formed on the upper surfaces of the left and right tables 2 and 2. Is slidably supported.

  Further, as shown in FIGS. 3, 4 and 6, the presser plate drive device 19 includes a belt-like workpiece W <b> 1 on a horizontal guide shaft 19 a laid between the front side plate 15 b and the back side plate 15 c of the movable table 15. A strip-shaped workpiece is supported between the front / rear moving plate 19b and the front plate 15b and the back plate 15c of the moving table 15 supported by a bolt on the lower surface side of the movable holding plate 18 and supported in a reciprocating manner in the width direction of W2. The connecting shaft 19c is slidably installed in the width direction of W1 and W2, and is slidably inserted into the central portion of the front and rear moving plate 19b. The fluid pressure cylinder 19d that slides in the width direction of W1 and W2 and the movable holding plate 18 are screwed into the front and rear moving plate 19b so as to be movable up and down, and the lower end is connected to the connecting shaft 19c. It is composed of a bolt shaft 19f with a lever 19e that is removably locked in a locking hole 19c 'formed on the upper surface at a constant pitch. The bolt shaft 19f with a lever 19e is used to move the front and rear moving plate 19b. The movable holding plate 18 can be reciprocated in the width direction of the strip-like workpieces W1 and W2 by being fixed to the connecting shaft shaft 19c and sliding the connecting shaft 19c by expanding and contracting the fluid pressure cylinder 19d in this state. It can be done.

  The distance between the reference plate 17 and the movable side presser plate 18 before the band-like workpieces W1 and W2 are clamped and fixed is set to be slightly larger than the width of the band-like workpieces W1 and W2 to be butt welded. This interval is determined by loosening the bolt shaft 19f with the lever 19e, moving the movable side presser plate 18 and the front / rear moving plate 19b in the width direction of the belt-like workpieces W1, W2, and tightening the bolt shaft 19f with the lever 19e at a predetermined position. The movable side pressing plate 18 and the front and rear moving plate 19b can be adjusted by fixing them to the connecting shaft 19c side.

  The cutting device 3 is disposed between the left and right tables 2 and 2 and is provided at the center of the base plate 12a of the lifting platform 12, and moves up and down together with the left and right tables 2 and 2. The end portion of the strip-shaped workpiece W1 and the start end portion of the subsequent strip-shaped workpiece W2 are simultaneously cut along the width direction.

  That is, as shown in FIGS. 2, 3, 4, 5, and 8, the cutting device 3 is disposed on the upper surface of the peripheral edge of the through hole 12a ′ of the base plate 12a of the lifting platform 12 so as to face the base plate. The left and right fixed bases 20 and 20 fixed in an upright position on the upper surface of 12a and the upper ends of the left and right fixed bases 20 and 20 are fixed in a posture along the width direction of the strip-like workpieces W1 and W2, and the cutting edges thereof are The left and right fixed blades 21 and 21 located at the same height as the top surfaces of the tables 2 and 2 and the upper half side are fixed to the left and right fixing bases 20 and 20 through the through holes 12a ′ of the base plate 12a. At the same time, the lower half part is supported below the peripheral edge of the through hole 12a ′ of the base plate 12a and the frame base 22, and is supported in the frame base 22 so as to be movable up and down. An insertion hole 23a is formed in which the start end of the workpiece W2 is inserted. The frame-shaped movable plate 23 is fixed to the upper edge side of the inner peripheral edge of the insertion hole 23a of the movable plate 23. The left and right movable blades 24, 24 that simultaneously cut the starting end portion of the belt-like workpiece W2 along the width direction, and the lower end portion of the movable plate 23, are vertically inserted into the lower end portion of the frame base 22 in a vertical posture. A pair of connecting shafts 25, 25, a tip block 26 that connects the lower ends of the pair of connecting shafts 25, 25, and a lower surface of the frame base 22 and the tip block 26 are interposed, and the movable plate 23 is lowered. A single-acting fluid pressure cylinder 27 composed of a cylinder 27a and a rod 27b, a return compression coil spring 28 interposed between the frame base 22 and the tip block 26, for returning the movable plate 23 upward, and a frame A post 29 on the base 22 and A lock provided with a lock pin 31a that is attached via a rate 30 and is inserted into a lock hole 22c 'formed in the frame base 22 and a lock hole 23b formed in the movable plate 23 to lock the movable plate 23 in a lowered position. And a hydraulic cylinder 31 for use.

  The frame base 22 is inserted into the through hole 12a 'of the base plate 12a and has a pair of convex side plates 22a, 22a whose upper half is fixed between the left and right fixing bases 20, 20, and a pair of convex side plates. A block-like lower member 22b fixed between the lower end portions of 22a and 22a and forming a working fluid supply port to the fluid pressure cylinder 27, and a lock hole 22c ′ into which the lock pin 31a of the lock fluid pressure cylinder 31 is inserted. And a pair of middle plates 22c and 22c having different heights, which are arranged opposite to each other on the upper surface of the lower member 22b and fixed between the pair of convex side plates 22a and 22a. ing.

  Further, the movable plate 23 to which the left and right movable blades 24 and 24 are attached has a part of the insertion hole 23a positioned on the conveying line of the belt-like workpieces W1 and W2 due to the elastic force of the return compression coil spring 28. The movable plate 23 as a whole is moved to the left and right tables 2 and 2 by the rising position (the position shown in FIGS. 5 and 8) where the end portions and the start end portions of the strip-like workpieces W1 and W2 can be inserted into 23a. A lowering position (position shown in FIG. 4) located below the upper surface of the head can be taken.

  Further, the left and right movable blades 24, 24 are located on the upper edge side of the inner peripheral edge of the insertion hole 23 a of the movable plate 23 in a state where the blade edge of one movable blade 24 is biased upward or downward relative to the blade edge of the other movable blade 24. A large load is applied to the cutting device 3 when simultaneously cutting the end portion of the preceding strip-shaped workpiece W1 and the start end portion of the following strip-shaped workpiece W2 by the cooperative action of the left and right fixed blades 21, 21. It is devised not to.

Thus, according to the cutting device 3, the leading end of the preceding strip-shaped workpiece W1 and the starting end of the trailing strip-shaped workpiece W2 are in the raised position in contact with the left and right fixed blades 21, 21, respectively. The movable plate 23 is inserted into the insertion hole 23a of the movable plate 23. In this state, the movable plate 23 and the left and right movable blades 24, 24 are lowered by the fluid pressure cylinder 27 from the raised position to the lowered position. And the left and right fixed blades 21, 21 can simultaneously cut the end portions and the start end portions of the strip-like workpieces W 1, W 2 along the width direction, and at the lock hole 22 c ′ of the frame base 22 and the lowered position. By inserting the lock pin 31 a of the locking fluid pressure cylinder 31 into the lock hole 23 b of a certain movable plate 23, the movable plate 23 can be locked at the lowered position, and further, the lock of the locking fluid pressure cylinder 31 can be locked. If it is missing pin 31a from the lock hole 23b of the movable plate 23, the movable plate 23 is adapted to return to the raised position from the lowered position by the elastic force of the return compression coil spring 28.
The cutting device 3 discharges the cut ends of the strip-like workpieces W1 and W2 cut by the left and right fixed blades 21 and 21 and the left and right movable blades 24 and 24 into the insertion hole 23a of the movable plate 23. It can be collected in a scrap case 32 disposed in the vicinity of the cutting device 3.

  As shown in FIGS. 4 and 9, the clamp mechanism 4 is disposed at an upper portion of the welding device 5 that is disposed horizontally above and below the cutting device 3 (above the abutting portions of the strip-like workpieces W1 and W2). An upper jig 4 'provided on the lower surface side of the frame 35 and holding the upper surface in the vicinity of the abutting portion of the preceding belt-like workpiece W1 and the succeeding belt-like workpiece W2 which are abutted by the left and right tables 2 and 2; 3 and a lower jig 4 ″ that clamps and fixes the vicinity of the abutting portion of the belt-like workpieces W1 and W2 between the upper jig 4 ′ and the upper jig 35 ′. Is moved forward to move the upper jig 4 ′ to a position above the lower jig 4 ″, and then the lifting platform 12 and the cutting device 3 are raised to bring the lower jig 4 ″ closer to the upper jig 4 ′. As a result, both belt-like workpieces W1 and W2 are matched And it is capable of tightly and firmly clamped fixed in the vertical direction out of the vicinity of the upper jig 4 'and the lower jig 4 ".

  Specifically, as shown in FIG. 9, the upper jig 4 ′ is in a posture along the width direction of the belt-like workpieces W <b> 1 and W <b> 2 on the lower surface side of the upper frame 35 of the welding apparatus 5 to be described later with a slight gap. The left and right upper clamps 4a and 4a are arranged so as to be opposed to each other and can come into contact with the upper surface in the vicinity of the abutting portion of both belt-like workpieces W1 and W2. The arc energy is intensively applied to the butt portion.

On the other hand, as shown in FIG. 9, the lower jig 4 ″ is inserted into and fixed to a recess formed in the upper end surface of the movable plate 23 of the cutting device 3 to form a gas flow path 4b ′ through which a shielding gas such as argon gas flows. The back jig 4b having a convex cross section and the gas jig through which the shield gas flows when welding the belt-like workpieces W1 and W2 are fixed to the upper surface of both sides of the back jig 4b, and the movable plate 23 is in the lowered position. It consists of a pair of back bars 4c and 4c that are flush with the upper surfaces of the left and right tables 2 and 2, and absorbs excess heat when butt-welding the butt portions of both belt-like workpieces W1 and W2. In addition to preventing meltdown and perforation of the belt, thermal distortion of both belt-like workpieces W1, W2, etc., a shield gas is flowed behind the butt portion of both belt-like workpieces W1, W2 to prevent oxidation of the welded portion. It is.
Reference numeral 4d denotes end blocks fixed to both ends of the upper end of the movable plate 23.

The welding device 5 is disposed at an upper position of the cutting device 3 (above the abutting portion of the strip-like workpieces W1 and W2) so as to be reciprocally movable in the front-rear direction, and is a standby position (behind the cutting device 3). The state of being housed in the cabinet body 1) and the welding work position (above the belt-like workpieces W 1 and W 2 butted by the left and right tables 2, 2) located above the cutting device 3 in which the movable plate 23 is in the lowered position. The state located above the part) can be taken.
This welding device 5 is pulled forward when welding the butted portions of the strip-like workpieces W1 and W2, the tip of the welding torch 39 is automatically adjusted in height, and the welding torch 39 is moved at a predetermined speed. The linear movement is made along the abutting portions of W1 and W2.

  That is, as shown in FIGS. 2, 3, 4, 6, and 10, the welding apparatus 5 has a plurality of guide shafts 34 on a mounting plate 33 that stands upright on the upper surface of the intermediate plate 1a of the cabinet body 1. A substantially frame-shaped upper frame 35 supported so as to be reciprocally movable in the front-rear direction via the intermediate plate 1a and disposed on the upper surface of the intermediate plate 1a along the width direction of the strip-shaped workpieces W1 and W2, and via the cylinder bracket 36 A rodless cylinder 37 (for example, a magnet-type rodless cylinder) that reciprocally moves 35 between a standby position (position shown in FIG. 6) and a welding work position (position shown in FIG. 7), and an upper frame 35 A torch traveling base 38 supported so as to be reciprocally movable in the width direction of the belt-like workpieces W1 and W2, and supported by the torch traveling base 38 so as to be movable up and down. A welding torch 39 with a rod 39a inserted therein, and a torch vertical drive device 40 which is provided on the torch traveling base 38 and moves the welding torch 39 up and down, and the torch traveling base 38 and the welding torch 39 are connected to the belt-like workpiece W1. , W2 for reciprocating in the width direction of W2, and for setting the gap between the tungsten electrode rod 39a of the welding torch 39 and the strip-like workpieces W1 and W2 before welding is started, during welding. An electrode contact detection device (not shown) that immediately detects a contact accident between the tungsten electrode rod 39a and the belt-like workpieces W1 and W2, a torch vertical drive device 40 and a torch travel drive device based on a detection signal from the electrode contact detection device A controller (not shown) for controlling 41 and the like, and an arc generated at the time of welding are attached to the torch carriage 38 so as to cover the welding torch 39. A torch cover 42 for shielding the light, and a vertically movably mounted on the upper frame 35 safety cover 43.

Specifically, the upper frame 35 is formed in a substantially frame shape, is formed in a thick and long plate shape, and is arranged on the left and right sides arranged in an opposing manner along the width direction of the strip-like workpieces W1 and W2. Upper side plates 35a, 35a, upper front plates 35b that connect the front ends of the left and right upper side plates 35a, 35a, and a horizontal upper connection plate 35c that connects the rear ends of the left and right upper side plates 35a, 35a The upper traveling plate 35d fixed to the lower surfaces of the left and right upper side plates 35a, 35a and the lower surface of the upper connecting plate 35c, and the lower traveling surface 35d fixed to the lower surface of the upper traveling plate 35d and slidably fitted to the guide shaft 34. A block body 35e and a boss portion 35f that protrudes from the upper front plate 35b and is removably inserted into a receiving hole of the upper frame receiver 61 fixed to the front surface of the cabinet body 1.
The upper frame 35 is reciprocally movable between a standby position (position shown in FIG. 6) and a welding work position (position shown in FIG. 7) by a rodless cylinder 37. The portion 35 f is inserted into the receiving hole of the upper frame receiver 61, and the tip portion is supported by the upper frame receiver 61.

  The torch carriage 38 is supported on the left and right upper side plates 35a and 35a of the upper frame 35 via a guide rail 44 so as to be able to reciprocate in the width direction of the belt-like workpieces W1 and W2, and the left and right upper side plates 35a and 35a. A torch up-and-down plate 38a located between them is provided.

  The welding torch 39 is mounted in a vertical posture through a torch mounting member 47 on the tip of a torch vertical arm 46 supported on the torch vertical plate 38a of the torch carriage 38 via a linear guide 45 so as to be movable up and down. The upper frame 35 is substantially frame-shaped. A conventionally known TIG welding torch 39 is used as the welding torch 39.

  The torch vertical drive device 40 includes a torch vertical motor 40b attached to the upper surface of the torch carriage 38 via a torch vertical bracket 40a, a ball nut 40c fixed to the torch vertical arm 46, and a torch vertical motor 40b. And a vertical ball screw 40e screwed into a ball nut 40c. When the ball screw 40e is rotated in the forward and reverse directions by the torch vertical motor 40b, the rotation is prevented. The ball nut 40c thus moved up and down along the ball screw 40e moves the torch up and down arm 46 and the welding torch 39 up and down.

  The torch travel drive device 41 includes a torch travel motor 41b attached to the upper surface of the torch travel platform 38 via a torch travel bracket 41a, a pinion 41c attached to the output shaft of the torch travel motor 41b, and the upper frame 35. The rack 41d is fixed in a posture along the width direction of the belt-like workpieces W1 and W2 on one upper side plate 35a, and is configured to be engaged with the pinion 41c. When the pinion 41c is rotated forward and backward by the torch travel motor 41b. The torch travel base 38 and the welding torch 39 supported by the torch travel base 38 are reciprocated in the width direction of both belt-like works W1 and W2.

  The electrode contact detection device (not shown) includes a welding voltage monitoring circuit for detecting whether or not a welding voltage is applied between the tungsten electrode rod 39a and the strip workpieces W1 and W2, and a tungsten electrode rod 39a and the strip workpieces W1 and W2. The electrode contact detection device disclosed in Japanese Patent Laid-Open No. 2001-300759 is used as this electrode contact detection device.

  The controller (not shown) drives and controls the torch up / down drive device 40 based on the detection signal from the electrode contact detection device, and the distance between the tip of the tungsten electrode rod 39a of the welding torch 39 and the belt-like workpieces W1, W2. (So-called arc length) is automatically adjusted to a predetermined value, and then the torch travel drive device 41 is driven and controlled to reciprocate the torch travel platform 38 in the width direction of the belt-like workpieces W1 and W2. The welding torch 39 supported by 38 is linearly moved along the abutting portions of the strip-like workpieces W1 and W2 at a predetermined speed. Further, when the tungsten electrode rod 39a and the strip-shaped workpieces W1, W2 come into contact with each other during welding, the controller stops the torch travel drive device 41 and shuts off the welding power source.

The torch cover 42 is fixed to the upper surface side of the torch traveling base 38 in a posture protruding forward from the torch traveling base 38, and a plate portion 42a having a torch insertion hole 42a 'into which the upper end side of the welding torch 39 is inserted. The box portion 42b is connected to the plate portion 42a so as to protrude upward, and includes a power supply cable, a shield gas supply hose and the like, and covers the periphery of the welding torch 39 and the upper frame 35 from the upper surface side. It shields intense light from the arc generated during welding and protects the operator from arc light.
When the torch cover 42 is fixed to the torch carriage 38, the upper end side of the welding torch 39 projects upward from the torch insertion hole 42a 'of the plate portion 42a. Therefore, the tungsten electrode rod 39a can be exchanged smoothly and satisfactorily without any hindrance when the tungsten electrode rod 39a is removed from or inserted into the welding torch 39.

  The safety cover 43 is supported on the outer surfaces of the left and right upper side plates 35a, 35a of the upper frame 35 via a linear guide 48 so as to be movable up and down. When the left and right tables 2, 2 are lifted, the left and right tables 2, 2 are supported. When the left and right tables 2 and 2 are lowered, they are lowered together with the left and right tables 2 and 2, and when the left and right tables 2 and 2 are moved up and down, The gap formed between the tables 2 and 2 is covered up.

The rolling device 6 rolls the welded portions of the two strip-like workpieces W1 and W2 that are disposed at the side position of the table 2 on the downstream side of the left and right tables 2 and 2 and are butt welded to each other. The rolling table 49 on which the welded portions of the belt-like workpieces W1 and W2 are supported and mounted, and the support bracket 51 and the pressure shaft 2 are provided at the base end of the rolling table 49. A rolling upper part 53 attached to the rolling upper part 53 so as to be movable in the vertical direction through the vertical direction, and a rolling roller table 55 supported by the rolling upper part 53 so as to be reciprocally movable in the width direction of the strip-like workpieces W1, W2. A rolling roller 57 that is rotatably supported by the rolling roller table 55 and rolls on the welded portion of the strip-shaped workpieces W1 and W2, and a rolling upper portion 53 is pressed toward the rolling table 49 so as to press the rolling roller 57 in a pressurized state. Contact the welded parts of workpieces W1 and W2 And a pressure means 60..
In this example, the rolling device 6 is disposed at a side position of the right table 2, and is attached to the outer surface of the right side plate 12 c of the lifting platform 12 and moves up and down synchronously with the left and right tables 2 and 2. It is like that.

  That is, as shown in FIGS. 2, 3, 11, 12, 13, and 14, the rolling device 6 is fixed to the outer surface of the side plate 12c of the lifting platform 12 in a posture along the width direction of the strip-like workpieces W1 and W2. The rolling table 49 on which the welded portions of the belt-like workpieces W1 and W2 are supported and mounted, and the support bracket that is supported and mounted on the upper surface of the base end of the rolling table 49 via the two guide shafts 50 so as to be movable up and down. 51 and a rolling position (position shown in FIG. 11) which is rotatably attached by a pressing shaft 52 with the base end portion having play to the support fitting 51 and parallel to the rolling table 49. A rolling upper part 53 that can take an open position (position shown in FIG. 13) in a standing position with respect to the platform 49, and a reciprocating movement in the width direction of the strip-like workpieces W1 and W2 via the linear guide 54 on the rolling upper part 53. A rolling roller base 55 with a handle 55a supported by It is rotatably supported by a rolling roller base 55 via a roller shaft 56, and rolls on the welded portion of the belt-like workpieces W1, W2 supported and placed on the rolling base 49 when the rolling upper part 53 is in the rolling position. A rolling roller 57, a stopper 58 with a lock screw 58a that is provided on the rolling upper portion 53 so as to be movable and adjustable in the width direction of the belt-like workpieces W1 and W2, and that controls the movement of the rolling roller 57 by contacting the rolling roller table 55, and rolling A scale 59 for determining the position of the stopper 58, which is affixed to the upper surface of the upper portion 53, and the rolling upper portion 53 at the rolling position are pressed toward the rolling table 49, and the rolling rollers 57 are pressed in a state where the belt-like workpieces W1, W2 are pressed. It comprises pressure means 60 that abuts on the welded part, and the rolling roller 57 to which the pressing force is applied toward the rolling table 49 side by the pressure means 60 is applied to the belt-like workpiece W1. Along the welds W2 by rolling the longitudinal direction of the welded portions of the strip-shaped workpiece W1, W2 is obtained so as to rolling.

  The pressurizing means 60 is attached to the lower surface side of the support bracket 51, and can be moved up and down through a base end portion of the rolling table 49 in a vertically movable fixed pressing shaft 60a. A fixed-side compression coil spring 60b that is interposed between the pressure shaft 60a and presses the proximal end portion of the rolling upper portion 53 toward the pressurizing table 49 via the support fitting 51, and the top end portion of the rolling table 49 in the vertical direction. A front-side pressure shaft 60c with a handle 60c 'that can be inserted into a bifurcated portion 53a formed at the tip of the rolling upper portion 53, and a front-side pressure shaft 60c. When the front pressure shaft 60c is inserted into the bifurcated portion 53a of the rolling upper portion 53 at the rolling position, a pressure collar 60d that is locked to the upper surface of the front end portion of the rolling upper portion 53, and a handle of the front pressure shaft 60c 60c 'and pressure collar 60d The front side compression shaft spring 60e presses the pressure collar 60d locked to the top surface of the top end of the rolling upper part 53 toward the front end side of the rolling top 53. When the pressure collar 60d is locked to the top surface of the tip of the rolling upper portion 53, the rolling upper portion 53 is held at the rolling position and the fixed side compression coil is inserted into the forked portion 53a of the rolling upper portion 53. The rolling upper portion 53 is pressed toward the rolling table 49 by the spring 60b and the front compression coil spring 60e, and the rolling roller 57 comes into contact with the strip-shaped workpieces W1 and W2 in a pressurized state.

  In this rolling apparatus 6, when the rolling roller base 55 moves to the base end side of the rolling upper portion 53, the center of the rolling roller 57 coincides with the side end on the far side of the welded portion of the two belt-like workpieces W1 and W2. In addition, when the rolling roller base 55 moves to the tip side of the rolling upper portion 53 and comes into contact with the stopper 58, the center of the rolling roller 57 is located on the front side of the welded portion of the belt-like workpieces W1 and W2. It is set to match the side edge. Accordingly, the rolling roller 57 reciprocates on the welded portion of the two strip-like workpieces W1 and W2.

  In FIGS. 1 and 2, 62 is a guide plate fixed to the left side plate 12c of the lifting platform 12 and the rolling platform 49 of the rolling device 6, and 63 is a front cover fixed to the front end of the base plate 12a of the lifting platform 12. , 64 are side covers fixed to both ends of the base plate 12 a of the lifting platform 12.

Next, a case where the preceding belt-like workpiece W1 and the succeeding belt-like workpiece W2 are joined by butt welding using the above-described butt joining device for the strip-like workpieces W1, W2 will be described.
The welding conditions such as the welding current, arc length, supply amount of shield gas, traveling speed of the welding torch 39, and the tip shape of the tungsten electrode rod 39a depend on the material, plate thickness, width, etc. of the strip workpieces W1, W2. Of course, the optimum conditions are set. In addition, the belt-like workpieces W1 and W2 made of stainless steel, iron, copper, copper alloy, aluminum alloy or the like having a thickness of 0.2 mm or more are used for the belt-like workpieces W1 and W2.

  First, the end of the preceding belt-like workpiece W1 is placed on the downstream table 2 (in this example, the right table 2), and the side edge on the back side of the preceding belt-like workpiece W1 is the reference plate 17 of the right table 2. Is inserted into the insertion hole 23a of the movable plate 23 at the ascending position of the cutting device 3, and the starting end of the succeeding belt-like workpiece W2 is located upstream. The rear strip-shaped workpiece is placed on the second table 2 (in this example, the left-side table 2) and the side edge of the rear strip-shaped workpiece W2 is in contact with the reference plate 17 of the left table 2. The starting end of W2 is inserted into the insertion hole 23a of the movable plate 23 at the raised position (see FIG. 15).

Next, the presser plate drive device 19 is operated in the state described above to move the movable side presser plates 18 of the left and right tables 2 and 2 toward the reference plate 17 side. Then, the end portion of the preceding belt-like workpiece W1 supported and placed on the left and right tables 2 and 2 and the start end portion of the succeeding belt-like workpiece W2 are fixed to the reference plate 17 and the movable side presser with respect to the position of the reference plate 17. The plate 18 is clamped and fixed from the width direction.
At this time, since only the movable side presser plate 18 is moved in the width direction of the strip-like workpieces W1, W2, the strip-like workpieces W1, W2 are viewed from the width direction with reference to the position of the reference plate 17 regardless of the width. It will be held and fixed.
In addition, since the plurality of notches 18a into which the operator's fingers enter are formed on the side edge portion of the movable side holding plate 18 facing the reference plate 17, the belt-like workpieces W1 and W2 having extremely narrow widths are used as the reference plate 17. And the movable side presser plate 18 are clamped and fixed in the width direction by pressing the belt-like workpieces W1 and W2 with the fingers toward the left and right tables 2 and 2 so that the fingers enter the notch 18a of the movable side presser plate 18. In other words, even if the movable holding plate 18 is close to the reference plate 17, the operator does not hold his finger between the movable holding plate 18 and the reference plate 17, and the strip-like workpieces W <b> 1 and W <b> 2. Can be set safely.

When the leading end of the preceding strip-shaped workpiece W1 and the starting end of the trailing strip-shaped workpiece W2 are clamped and fixed by the left and right tables 2 and 2, the cutting device 3 is operated to move the movable plate 23 in the raised position to the fluid pressure cylinder 27. To lower to the lowered position. Then, due to the cooperative action of the left and right movable blades 24, 24 and the left and right fixed blades 21, 21, the end portion of the preceding strip-like workpiece W1 and the start end portion of the following strip-like workpiece W2 are simultaneously cut along the width direction. (See FIG. 16).
At this time, since the end portion of the preceding belt-like workpiece W1 and the starting end portion of the following belt-like workpiece W2 are simultaneously cut by the left and right movable blades 24, 24 and the left and right fixed blades 21, 21, both belt-like workpieces W1, W2 Can be cut quickly. Further, since one of the left and right movable blades 24, 24 is biased upward or downward with respect to the other movable blade, a large load is not applied to the movable blade and the fixed blade when cutting the belt-like workpieces W1, W2. The belt-like workpieces W1 and W2 can be cut with a small driving force. Furthermore, the cut ends of both strip-like workpieces W1 and W2 that have been cut and dropped into the insertion hole 23a of the movable plate 23 are discharged from the insertion hole 23a of the movable plate 23 and collected in the scrap case 32. In addition, the movable plate 23 of the cutting device 3 is locked at the lowered position by the locking fluid pressure cylinder 31 after cutting both the band-like workpieces W1 and W2.

  When the end portion of the preceding belt-like workpiece W1 and the starting end portion of the succeeding belt-like workpiece W2 are cut along the width direction, the left and right tables 2 and 2 move in a direction closer to the fluid pressure cylinder 16 and the moving table 15. The cut end of the preceding belt-like workpiece W1 and the cut end of the succeeding belt-like workpiece W2 are brought into contact with each other in a close contact state (see FIG. 17).

When the end of the preceding belt-like workpiece W1 and the starting end of the following belt-like workpiece W2 are abutted, the upper frame 35 of the welding apparatus 5 is advanced from the standby position to the welding work position by the rodless cylinder 37, and the clamp mechanism 4 The upper jig 4 'is moved to a position above the abutting portion of both belt-like workpieces W1 and W2 (see FIG. 18). In this state, the lifting platform 12 is raised by the fluid pressure cylinder 13 to raise the left and right tables 2, 2 and the cutting device 3, and the lower plate provided on the upper surfaces of the left and right tables 2, 2 and the movable plate 23 of the cutting device 3. The upper surface of the tool 4 ″ and the lower surface of the upper jig 4 ′ are substantially at the same height. As a result, the belt-like workpieces W1 and W2 have their upper jig 4 ′ and lower jig 4 ″ in the vicinity of the butted portions. Thus, it is clamped and fixed from above and below (see FIG. 19).
When the left and right tables 2 and 2 are raised, the safety cover 43 attached to the upper frame 35 so as to be movable up and down is abutted and pushed up by the left and right tables 2 and 2, and the upper frame 35 and the left and right tables 2 and 2 are pushed up. Since the safety cover 43 covers the gap formed between the operator and the operator, the operator does not accidentally insert a finger or the like, and the operator can work more safely.

When the vicinity of the abutting portion of the belt-like workpieces W1 and W2 is clamped and fixed by the clamp mechanism 4, the welding torch 39 of the welding device 5 is automatically adjusted in height by the torch vertical drive device 40 and the like, and then the welding torch An arc is generated between the tip of the 39 tungsten electrode rod 39a and the butted portions of the two strip-like workpieces W1 and W2, and in this state, the torch carriage 38 is moved in the width direction of the strip-like workpieces W1 and W2 by the torch running drive device 41. It reciprocates and butt-welds the butt part of both belt-like workpieces W1 and W2.
At this time, since the welding torch 39 moves within the substantially frame-shaped upper frame 35 and the periphery of the welding torch and the upper frame 35 are covered from the upper surface side by the torch cover 42, the belt-like workpieces W1, W2 The arc light is almost completely shielded by the upper frame 35 and the torch cover 42 at the time of welding the butt, so that the operator can look directly at the intense light from the arc, or the ultraviolet rays and infrared rays that are harmful to the eyes and skin. You can safely perform welding without having to bathe.
In addition, the side edges of the strip-like workpieces W1 and W2 are brought into contact with a reference plate 17 provided in a fixed state at the back side portions of the left and right tables 2 and 2, and both strip-like workpieces W1 and W2 are brought into contact with the reference plate at this position. 17 and the movable side presser plate 18 are clamped and fixed from the width direction, the belt-like workpieces W1 and W2 always have the same welding start position regardless of the width, and the start position of the welding torch 39 is set to the belt-like workpieces W1 and W2. There is no need to change according to the width of W2.

  When the butt welding of the butt portions of both belt-like workpieces W1 and W2 is completed, the lifting platform 12 is lowered by the fluid pressure cylinder 13 to lower the left and right tables 2 and 2 and the cutting device 3, and the upper frame 35 of the welding device 5 is used. Is retracted from the welding work position to the standby position by the rodless cylinder 37. Further, the movable side pressing plates 18 of the left and right tables 2 and 2 are moved away from the reference plate 17 by the pressing plate driving device 19. As a result, both belt-like workpieces W1 and W2 that have been butt-welded become free.

The belt-like workpieces W1 and W2 in the free state are subsequently rolled at their welds by the manual rolling device 6.
In order to roll the welded portion of both belt-like workpieces W1 and W2, after placing the welded portion of both belt-like workpieces W1 and W2 on the rolling table 49 of the welding apparatus 5 in which the rolling upper portion 53 is in the open position, the rolling upper portion 53 is moved. The rolling upper portion 53 is pressed toward the rolling table 49 by the pressurizing means 60 (see FIGS. 13 and 14). That is, the front pressure shaft 60 c is rotated upward and inserted into the bifurcated portion 53 a of the rolling upper portion 53, and the pressure collar 60 d is locked to the upper surface of the tip end portion of the rolling upper portion 53. Then, while the rolling upper part 53 is held at the rolling position, the rolling upper part 53 is pressed toward the rolling table 49 by the fixed side compression coil spring 60b and the front side compression coil spring 60e, and the rolling roller 57 is in a pressurized state. It contacts the welded portion of the strip-like workpieces W1, W2.
At this time, since the rolling upper part 53 provided with the rolling roller 57 can take an open position where it stands up with respect to the rolling table 49 and a rolling position parallel to the rolling table 49, Even when W1 and W2 are thick, the rolling roller 57 can be reliably brought into contact with the welded portions of the strip-like workpieces W1 and W2.

When the rolling upper portion 53 is held at the pressing position by the pressing means 60, the rolling roller table 55 is moved back and forth in the width direction of the strip-like workpieces W1 and W2 by holding the handle 55a of the rolling roller table 55, and the rolling roller table 55 A rolling roller 57 rotatably supported by 55 is rolled on the welded portion of both belt-like workpieces W1 and W2. As a result, the welded portions of the belt-like workpieces W1 and W2 are rolled, and the thickness and structure of the welded portions of the belt-like workpieces W1 and W2 are made uniform.
At this time, the rolling roller 57 to which the pressing force is applied toward the rolling table 49 side by the pressurizing means 60 is rolled in the front-rear direction along the welded portions of the two strip-like workpieces W1, W2, thereby causing the two strip-like workpieces W1, W1. Since the welded portion of W2 is rolled, the welded portions of the strip-like workpieces W1 and W2 can be rolled reliably and satisfactorily, and the thickness and structure of the welded portion can be made uniform reliably and satisfactorily. it can.
Further, the position of the rolling roller table 55 moved to the base end side of the rolling upper portion 53 is set so that the center of the rolling roller 57 coincides with the side end on the back side of the welded portion of the belt-like workpieces W1 and W2. The stopper 58 that restricts the movement of the rolling roller 57 in contact with the rolling roller base 55 that has moved to the leading end side of the rolling upper portion 53 on the leading end side of the rolling upper portion 53 is moved and adjusted in the width direction of the belt-like workpieces W1 and W2. Since the rolling roller 57 is configured to freely reciprocate on the welded portions of the strip-shaped workpieces W1 and W2, the rolling roller 57 does not come off the welded portion of the strip-shaped workpieces W1 and W2.
However, the position of the rolling roller base 55 moved to the base end side of the rolling upper part 53 is set so that the center of the rolling roller 57 coincides with the side end on the back side of the welded portion of the strip-like workpieces W1 and W2. Therefore, the rolling processing start position is always the same regardless of the width of the strip-like workpieces W1, W2.

It is a front view of the butt joining apparatus of the strip | belt-shaped workpiece | work which concerns on embodiment of this invention. It is a perspective view of the principal part of a butt joining apparatus similarly. It is a top view of the principal part of a butt joining apparatus similarly. It is a vertical front view of the principal part of a butt-joining apparatus. It is a vertical front view of the table part of a butt-joining apparatus and a cutting device. It is a vertical section side view of a table part of a butt joining device and a welding device. It is the vertical side view of the state which showed the table part of the butt | jointing apparatus and the welding apparatus, and the welding apparatus advanced. It is a partially broken side view of the cutting device of a butt-joining apparatus. It is a vertical front view of the principal part of the cutting device of a butt-joining apparatus and a welding apparatus. It is a vertical side view of the welding apparatus of a butt joining apparatus. It is a right view of the rolling apparatus of a butt joining apparatus. It is a left view of the rolling apparatus of a butt joining apparatus. It is a right view of the state which shows the use condition of a rolling apparatus and a rolling upper part exists in a standing position. It is a right view of the state which shows the use condition of a rolling apparatus and is rolling the strip | belt-shaped workpiece. It is a longitudinal front view of the principal part of the state which inserted the termination | terminus part and the start end part of a strip | belt-shaped work into the insertion hole of the movable plate of a cutting device, and clamped and fixed the termination | terminus part and the start end part of the strip | belt-shaped work with the left and right tables. It is a vertical front view of the principal part of the state which cut | disconnected the termination | terminus part and the start end part of the strip | belt-shaped workpiece | work with the cutting device. It is a vertical front view of the principal part of the state which moved the table on either side, and faced the end and the start of the cut strip | belt-shaped workpiece | work. It is a vertical front view of the principal part of the state which the welding apparatus and the upper jig moved forward and moved to a position above the abutting part of the belt-like workpiece. A vertical front view of the main part in a state where the right and left tables and the lower jig, etc. are lifted and the vicinity of the butt portion of the belt-like workpiece is held by the upper jig and the lower jig, and the butt portion of the belt-like workpiece is butt welded by the welding device It is.

Explanation of symbols

  21 is a left and right table, 3 is a cutting device, 4 is a clamping mechanism, 5 is a welding device, 6 is a rolling device, 17 is a reference plate, 18 is a movable side retainer plate, 18a is a notch in the movable side retainer plate, and 19 is a retainer. Plate driving device, 35 is an upper frame, 38 is a torch carriage, 39 is a welding torch, 39 a is a tungsten electrode rod, 42 is a torch cover, 43 is a safety cover, 49 is a rolling table, 53 is a rolling upper part, and 55 is Rolling roller base, 57 is a rolling roller, 58 is a stopper, 59 is a scale, 60 is a pressing means, W1 is a preceding belt-like workpiece, W2 is a trailing belt-like workpiece.

Claims (7)

  The end of the preceding belt-like workpiece (W1) and the starting end of the following belt-like workpiece (W2) are clamped and fixed from the width direction, respectively, and the end of the preceding belt-like workpiece (W1) and the trailing belt-like workpiece (W2) are fixed. Between the left and right tables (2), (2) and the left and right tables (2), (2), which can be reciprocated and moved up and down in the conveying direction of the belt-like workpieces (W1), (W2). A cutting device (3) that simultaneously cuts the end portion of the preceding strip-shaped workpiece (W1) and the start end portion of the following strip-shaped workpiece (W2) along the width direction, and both strip-shaped workpieces (W1), A clamp mechanism (4) for holding and fixing the vicinity of the butting part of (W2) from above and below, and a position above the abutting part of both belt-like workpieces (W1) and (W2) so as to be reciprocally movable in the front-rear direction. Both belt-like workpieces clamped and fixed by mechanism (4) 1), a welding device (5) for butt welding the butt portion of (W2), and the left and right tables (2), (2), disposed at the side position of the downstream table (2), A belt-shaped workpiece butt-joining apparatus constituted by a manual rolling device (6) for rolling the welded portion of both belt-like workpieces (W1) and (W2) to uniformize the thickness and structure of the welded portion, The welding device (5) includes a standby position located behind the abutting portion of both belt-like workpieces (W1) and (W2) and a welding work position located above the abutting portion of both belt-like workpieces (W1) and (W2). An upper frame (35) that is reciprocally movable in the front-rear direction, and a torch carriage (not shown) that is disposed on the upper frame (35) so as to be reciprocally movable in the width direction of both belt-like works (W1), (W2). 38) and the torch platform (38) are supported so as to be movable up and down, A welding torch (39) that is automatically height-adjusted with a Nungsten electrode rod (39a) attached thereto, and a welding torch (39) that is attached to the torch carriage (38) so as to cover the welding torch (39) is generated during welding. A belt-shaped workpiece butt-joining apparatus comprising a torch cover (42) for shielding arc light.   Safety covers (43) are attached to both side surfaces of the upper frame (35) so as to be movable up and down, and the safety covers (43) are arranged on the left and right tables (2), When (2) is lifted, the left and right tables (2), (2) are pushed up against the left and right tables (2), and when the left and right tables (2), (2) are lowered, the left and right tables (2), ( 2) The belt-like workpiece according to claim 1, wherein the belt-like workpiece is lowered together with the upper frame (35) and covers a gap formed between the left and right tables (2), (2). Butt joining device.   The left and right tables (2) and (2) are provided in a fixed state on the back side of the tables (2) and (2), and are in contact with the side edges on the back side of the strip-like works (W1) and (W2). A reference plate (17) for positioning the belt-like workpieces (W1) and (W2) at a fixed position regardless of their widths, and the strip-like workpieces (W1) and (W2) on the upper surfaces of the front side portions of the tables (2) and (2). The movable side presser plate (18) which is disposed so as to be reciprocally movable in the width direction of the belt and abuts on the front side edge of the belt-like workpieces (W1) and (W2), and the movable side presser plate (18) are connected to the belt-like workpiece (W1). ), (W2) and a presser plate drive device (19) reciprocally moved in the width direction, and the movable side presser plate (18) is moved to the reference plate (17) side by the presser plate drive device (19). Leading strips that are supported and placed on the left and right tables (2) and (2), respectively. The reference plate (17) and the movable side presser plate (18) from the width direction with respect to the position of the reference plate (17) with respect to the terminal end of the workpiece (W1) and the start end of the subsequent strip-like workpiece (W2) 2. The belt-like workpiece butt joining apparatus according to claim 1, wherein the belt-like work is clamped and fixed.   The strip-shaped workpiece according to claim 3, wherein a plurality of notches (18a) into which an operator's finger enters are formed in a side edge portion of the movable side pressing plate (18) facing the reference plate (17). Butt joining device.   The rolling device (6) is movable in the vertical direction on the rolling table (49) on which the welded portions of the belt-like works (W1) and (W2) are supported and placed, and on the base end of the rolling table (49), and A rolling upper part (53) that is mounted so as to be pivotable in the vertical direction and can take a rolling position that is parallel to the rolling table (49) and an open position that is in a standing posture with respect to the rolling table (49), and rolling A rolling roller base (55) supported by the upper part (53) so as to reciprocate in the width direction of the strip-like workpieces (W1), (W2), and a rolling upper part (53) supported rotatably by the rolling roller base (55). ) Is in the rolling position, the rolling roller (57) rolling on the welded portion of the belt-like workpieces (W1) and (W2) supported and mounted on the rolling table (49), the rolling table (49) and the rolling It is provided between the upper part (53) and the upper rolling part (53) at the rolling position is placed on the rolling table (4 ) Side and pressurizing means (60) for bringing the rolling roller (57) into contact with the welded portion of the strip-like workpieces (W1) and (W2) in a pressurized state. ) Rolls the rolling roller (57) applied with pressure toward the rolling table (49) side in the front-rear direction along the welded portions of both belt-like workpieces (W1) and (W2). The belt-shaped workpiece butt joining apparatus according to claim 1, wherein the welded portions (W1) and (W2) are rolled.   The position of the rolling roller table (55) moved to the base end side of the upper part of the rolling (53) is such that the center of the rolling roller (57) is the side end on the back side of the welded portion of the strip-shaped workpieces (W1) and (W2). Also, the rolling roller (57) is moved in contact with the rolling roller base (55) moved to the leading end side of the rolling upper part (53) on the leading end side of the rolling upper part (53). A stopper (58) for regulating is provided so as to be movable and adjustable in the width direction of the belt-like workpieces (W1) and (W2), and the rolling roller (57) reciprocates on the welded portion of the belt-like workpieces (W1) and (W2). The butt-joining apparatus for a strip-shaped workpiece according to claim 5, wherein:   The belt-shaped workpiece butt joining apparatus according to claim 6, wherein a scale (59) for facilitating positioning of the stopper (58) is provided on the rolling upper part (53).

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