JP6338629B2 - Butt joining device for strip metal sheet - Google Patents

Description

  The present invention is installed, for example, in a press line for producing various parts such as a lead frame from a strip-shaped metal thin plate such as stainless steel, iron, copper, and aluminum, a pipe forming line for producing a pipe from a strip-shaped metal thin plate, etc. The present invention relates to a strip metal sheet butt-joining apparatus in which the leading end of a new subsequent strip metal sheet is joined to the end of a flowing preceding strip metal sheet by butt welding, and in particular, the strip metal sheet along the width direction. The present invention relates to a butt-joining apparatus for strip-like metal thin plates, which is an improved cutting apparatus.

  Conventionally, as this type of butt-joint apparatus for belt-shaped metal thin plates, Japanese Patent No. 3970790 (Patent Document 1), Japanese Patent No. 486959 (Patent Document 2), and Japanese Patent No. 49277782 previously developed by the present inventors. (Patent Literature 3), Japanese Patent No. 5180898 (Patent Literature 4), Japanese Patent No. 5199920 (Patent Literature 5), Japanese Patent No. 5809378 (Patent Literature 6), and the like are known.

  That is, the strip-shaped metal sheet butt-joining apparatus is not shown, but the cabinet body having a horizontal work table for supporting and mounting the band-shaped metal sheet, the terminal end of the preceding sheet-shaped metal sheet, and the following band-shaped device A cutting device that cuts the starting end portion of the thin metal plate along the width direction, and a clamp that holds the vicinity of the butted portion from above and below in a state where the cutting ends of the preceding thin metal strip and the following thin thin metal plate are in contact with each other A mechanism and a welding device equipped with a TIG welding torch that butt welds the butt portions of both strip metal sheets, and a manual type machine that rolls the weld portions of both strip metal sheets to make the thickness and structure of the weld portions uniform. It has a rolling device and has an advantage that butt welding of a strip-shaped metal thin plate can be performed with high accuracy and high efficiency.

  Further, the cutting device of the butt joining apparatus includes a fixed blade disposed along the width direction of the strip-shaped metal thin plate, a movable blade disposed so as to be movable up and down with respect to the fixed blade, and a movable blade moved up and down. The movable blade is moved up and down by the fluid pressure cylinder, and the strip-shaped metal thin plate is cut along the width direction by the cooperative action with the fixed blade.

  By the way, since the cutting devices of the conventional butt-joining devices all use pneumatic cylinders as fluid pressure cylinders that move the movable blades up and down, the pneumatic cylinders are actuated to cut the strip metal sheet with the movable blades and fixed blades. When doing so, the working air to the pneumatic cylinder will be compressed. As a result, there was a problem that the movable blade suddenly moved and made a loud sound called “dawn”, generating noise.

  In order to solve the above-mentioned problem, although not shown, an oil booster (pressure intensifier) is installed to convert the air pressure into hydraulic pressure, and the fluid pressure cylinder of the cutting device is operated with non-compressible oil. You may do it.

  However, when an oil booster is used, the oil booster must be installed separately, and an installation space for the oil booster is required, making it difficult to make the system compact. Another problem is that costs will increase.

  In addition, the cutting device of the conventional butt-joining device tilts the blade edge of the movable blade in the vertical direction so that a large load is not applied when cutting the strip-shaped metal thin plate, so when cutting the strip-shaped metal thin plate The band-shaped metal thin plate may be pushed and moved by the inclined blade edge of the movable blade, and there has been a problem that cutting of the band-shaped metal thin plate cannot be performed accurately.

Japanese Patent No. 3970790 Japanese Patent No. 4861959 Japanese Patent No. 4927782 Japanese Patent No. 5180898 Japanese Patent No. 5199920 Japanese Patent No. 5809378

  The present invention has been made in view of such problems, and its purpose is to greatly reduce the noise generated when cutting a strip-shaped metal thin plate, and to reduce installation space and complicated piping work. An object of the present invention is to provide a butt joining apparatus for strip metal sheets that can cut the strip metal sheets with high accuracy without being required.

  In order to achieve the above object, a strip metal sheet butt-joining device according to the present invention is a pair of strips formed by butting the cut ends of a pair of strip metal sheets cut along the width direction by a cutting device. In a butt-joining device for a strip-shaped metal thin plate that is joined by butt welding the butt portion with a welding device in a state in which the metal thin plate is pressed, the cutting device includes a shearing head having an opening through which the strip-shaped metal thin plate can pass. The fixed blade fixed to the inner peripheral edge of the opening of the shearing head in a posture along the width direction of the belt-shaped metal thin plate, and provided in the shearing head to move up and down in a posture along the fixed blade. A movable blade that cuts the thin metal strip along the width direction, a cutting cylinder that is provided on the shearing head and moves the movable blade up and down, and a shearing head And a pressure-increasing cylinder that is operated by air pressure, and an oil passage that is connected to the cutting cylinder and the pressure-increasing cylinder and is filled with hydraulic oil that operates the cutting cylinder. .

  The pressure-increasing cylinder is preferably built in a shearing head.

  The pressure increasing cylinder has a large cylinder and a small cylinder arranged in series in a shearing head. The large cylinder slides in a gastight state in a large diameter cylinder hole formed in the shearing head and a large diameter cylinder hole. A large-diameter piston, which is movably inserted and divides a large-diameter cylinder hole into a low-pressure pressurization chamber and an air chamber, and an air supply / exhaust port for working air communicating with the low-pressure pressurization chamber, A small-diameter cylinder hole that is formed in the head and communicates in series with the large-diameter cylinder hole, and a small-diameter cylinder hole that is slidably inserted in an airtight state, and is filled with hydraulic oil at the tip of the small-diameter cylinder hole A small-diameter piston that forms a chamber and is connected to a large-diameter piston via a piston rod, and an oil supply / discharge port for hydraulic oil that communicates with the pressure-increasing chamber and is connected to a cutting cylinder. Door is preferable.

  The movable blade is provided with a pressing mechanism for pressing the band-shaped metal thin plate with the fixed blade at the time of cutting the band-shaped metal thin plate, the pressing mechanism is fixed to the supporting rod, and a support rod supported vertically by the movable blade, A pressing plate on which a cushioning material that can be brought into contact with the belt-shaped metal thin plate in a surface contact state is attached; and an elastic body that biases the pressing plate toward the belt-shaped metal thin plate, and the surface of the cushioning material of the pressing plate is It is preferable that the elastic body protrudes toward the band-shaped metal thin plate side from the movable blade by the elastic force of the elastic body.

  The strip metal butt joining device according to the present invention is a cutting device that cuts the strip metal plate along the width direction, and a pressure increasing cylinder that operates by air pressure is linked to a cutting cylinder that moves the movable blade up and down. Since the cutting cylinder and the pressure increasing cylinder are connected in a continuous manner by an oil passage filled with hydraulic oil, the cutting cylinder will operate with non-compressible hydraulic oil when cutting the strip metal sheet, As a result, it is not said that the movable blade suddenly moves and makes a loud sound, and the noise generated when the strip metal sheet is cut can be greatly reduced.

  Further, the strip metal butt joining apparatus according to the present invention is a cutting device that cuts the strip metal sheet along the width direction. The shearing head includes a pressure increasing cylinder formed by connecting a large cylinder and a small cylinder in series. The built-in configuration eliminates the need for installation space and can be downsized. Also, the length of the oil passage connecting the cutting cylinder and the booster cylinder is reduced, and piping work is simplified. Cost.

  Furthermore, the belt-shaped metal thin plate butt joining apparatus according to the present invention includes a presser mechanism in which the cutting device for cutting the belt-shaped metal thin plate along the width direction presses the belt-shaped metal thin plate with the fixed blade when the belt-shaped metal thin plate is cut. Therefore, when the strip metal sheet is cut, the strip metal sheet is not pushed and moved by the cutting edge of the movable blade, and the strip metal sheet can be cut with high accuracy. As a result, the end of the cut preceding strip-shaped metal thin plate and the start end of the succeeding strip-shaped metal thin plate can be matched with high precision, and precise butt welding can be performed. In addition, since the belt-like metal thin plate is pressed against the fixed blade side by the presser plate provided with the cushioning material of the presser mechanism, the belt-like metal thin plate can be prevented from being deformed or damaged.

It is a front view of the butt joining apparatus of the strip | belt-shaped metal thin plate which concerns on one Embodiment of this invention. It is a side view of a butt joining apparatus similarly. It is a top view of a butt joining apparatus similarly. It is a front view of the front-back unit for cutting devices which moves a cutting device back and forth. It is a side view of the front-and-rear unit for cutting devices which moves a cutting device back and forth. It is a top view of the front-back unit for cutting devices which moves a cutting device back and forth. It is a perspective view of a cutting device. It is a front view of a cutting device. It is a partially cutaway side view of a cutting device. It is a top view of a cutting device. FIG. 10 is a sectional view taken along line AA in FIG. 9.

Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.
1 to 3 show a strip metal butt joining apparatus according to an embodiment of the present invention. The strip metal butt joining apparatus is a strip metal thin plate (for example, thick) made of stainless steel, iron, copper, aluminum, or the like. Is installed in a press line or the like that produces various parts such as lead frames from the end of the preceding strip-shaped metal sheet W1 that flows on the line. They are joined by butt welding so that a new succeeding strip metal sheet W2 can be supplied onto the line following the preceding strip metal sheet W1.

  That is, as shown in FIGS. 1 to 3, the butt-joining apparatus for the strip-shaped metal thin plate includes a cabinet main body 2 provided with a horizontal work table 1 on which the strip-shaped metal thin plates W 1 and W 2 are supported and placed, and a leading position in a horizontal posture. A cutting device 3 that cuts the end portion of the strip-shaped metal thin plate W1 and the start end portion of the subsequent strip-shaped metal thin plate W2 along the width direction, and a central portion of the work table 1, both the strip-shaped metal thin plates W1, W2. The lower jig table 4 that can move up and down to support and place the cut end of the metal plate, the back bar 5 that is fitted and fixed to the upper surface of the lower jig table 4, and the belt-like metal thin plate that is protruded through the back bar 5 A center plate (not shown) for positioning the cut ends of W1 and W2 and a lower jig table 4 are arranged so as to be movable up and down, and the cut end portions of both strip-like metal thin plates W1 and W2 are respectively arranged on the lower jig table 4. Dense to the top of the The left and right work clamps 6 that are held and fixed in the state and the upper position of the lower jig table 4 are opposed to each other with a space therebetween, and the vicinity of the butted portions of the two strip-shaped metal thin plates W1 and W2 Left and right upper clamps 7 that are clamped and fixed with the back bar 5 from above and below, a welding device 8 that includes a TIG welding torch 8a that butt welds the butted portions of both strips of thin metal plates W1 and W2, and both strips of thin metal plates W1 , W2 includes a manual rolling device 9 for rolling the welded portion of W2 to uniformize the thickness and structure of the welded portion.

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

  The cabinet body 2 other than the cutting device 3, the lower jig table 4, the back bar 5, the center plate, the left and right work clamps 6, the left and right upper clamps 7, the welding device 8 and the rolling device 9 are conventionally known ones. Since the structure is similar, detailed description thereof is omitted here.

  The cutting device 3 is disposed at a side position of the work table 1 so as to be reciprocally movable in the front-rear direction of the cabinet body 2 (the width direction of the two strip-shaped metal thin plates W1, W2 in the horizontal posture) from the front / rear unit 16 for the cutting device. The leading strip metal sheet W1 and the trailing strip metal sheet W2 are pulled out to the work table 1 side during the cutting operation.

  As shown in FIGS. 4 to 6, the cutting device front / rear unit 16 includes a fixed base 17 disposed and fixed at a position below the side end of the work table 1, and a fixed base 17 along the front / rear direction of the cabinet body 2. A linear guide 18 comprising a guide rail 18a and a slider 18b sliding on the guide rail 18a, a moving base 19 fixed to the slider 18b of the linear guide 18 to which the cutting device 3 is attached, and a fixed base 17 and moving A fluid pressure cylinder 20 interposed between the base 19 and the side of the work table 1 and a standby position where the cutting device 3 is located in the cabinet body 2 by extending and contracting the fluid pressure cylinder 20. The cabinet main body 2 can be reciprocated in the front-rear direction over the cutting work position located at the position.

  As shown in FIGS. 7 to 11, the cutting device 3 includes a shearing head 22 having an opening 21 through which the strip metal thin plates W1 and W2 can pass, and strip metal strips W1 and W2 at the inner peripheral edge of the opening 21 of the shearing head 22. The fixed blade 23 fixed in a posture along the width direction of the plate and the shearing head 22 are provided so as to freely move up and down in a posture along the fixed blade 23. A movable blade 24 that cuts along the direction and a shearing head 22 provided on the shearing head 22 and a cutting cylinder 25 that moves the movable blade 24 up and down, and a shearing head 22 that are operated by air pressure to increase at low pressure to high pressure. A pressure increasing cylinder 26 that can be pressurized, and an oil passage filled with hydraulic fluid that connects the pressure increasing cylinder 26 and the cutting cylinder 25 in a continuous manner and operates the cutting cylinder 25 7, is provided on the movable blade 24, and a pressing mechanism 28 for pressing the band-like thin metal plate W1, W2 between the fixed blade 23 during the cutting of the belt-like sheet metal W1, W2.

  Specifically, the shearing head 22 is formed of a metal material in a thick plate shape, and is fixed to the movable table 19 with a fixing bolt (not shown) or the like in a vertical posture. A substantially rectangular opening 21 through which the belt-like metal thin plates W1 and W2 can pass is formed at the center of the shearing head 22.

  The fixed blade 23 is formed in a long plate shape with a metal material, and extends along the width direction of the strip-shaped metal thin plates W1 and W2 by a plurality of fixing bolts 29 at a position above the inner peripheral edge of the opening 21 of the shearing head 22. Fixed in posture. As for this fixed blade 23, the ridgeline part of the lower end becomes the blade edge 23a (cutting blade).

  The movable blade 24 is formed of a metal material into a substantially rectangular plate shape, and is provided at a position below the inner peripheral edge of the opening 21 of the shearing head 22 in a posture along the fixed blade 23 and movable up and down. . As for this movable blade 24, the ridgeline part of the upper end becomes the blade edge 24a (cutting blade).

  In this embodiment, the movable blade 24 is arranged in a posture along the fixed blade 23 at a position below the inner peripheral edge portion of the opening 21 of the shearing head 22. The movable blade holding plate 30 is fixed to both side positions by a plurality of fixing bolts 29, and both ends of the movable blade 24 are vertically moved between the inner peripheral edge portion of the opening 21 of the shearing head 22 and the movable blade holding plate 30. By being held movably, the shirring head 22 is provided so as to be movable up and down.

  Further, the cutting edge 24a of the movable blade 24 is formed in a downwardly inclined shape as it goes in the forward direction, and a large load is applied to the cutting device 3 when cutting the strip-shaped metal thin plates W1 and W2 by cooperation with the fixed blade 23. It has been devised so as not to hang.

  Further, the movable blade 24 is moved downward by a shortening operation of the cutting cylinder 25, which will be described later, so as to form a gap enough to insert the strip metal thin plates W1 and W2 between the movable blade 24 and the extending operation of the cutting cylinder 25. The cutting edge 24a of the movable blade 24 is positioned above the cutting edge 23a of the fixed blade 23, and can be set at a raised position where the strip-shaped metal thin plates W1 and W2 are cut along the width direction.

  As shown in FIGS. 9 and 11, the cutting cylinder 25 is fixed to the lower end surface of the shearing head 22 by a fixing bolt 29 in a vertical posture with the rod 25i facing upward, and the cylinder tube 25a and the cylinder tube 25a The head cover 25b that closes the lower end opening, the rod cover 25c that closes the upper end opening of the cylinder tube 25a, and the cylinder tube 25a are slidably inserted in an airtight state via the O-ring 25d, and then move through the cylinder tube 25a. A piston 25g that is divided into a moving side chamber 25e and a returning side chamber 25f, a rod 25i that is connected to the piston 25g and is slidably inserted into the rod cover 25c through a rod packing 25h in an airtight state, and a head cover 25b. A forward side port 25j communicating with the forward side chamber 25e, The forward side pipe joint 25k connected to the port 25j, the backward side port 25l formed in the rod cover 25c and communicating with the backward side chamber 25f, and the backward side pipe joint 25m connected to the backward side port 25l. Etc.

  Further, the rod 25i of the cutting cylinder 25 is linked to the movable blade 24 via the connecting shaft 25n, and the movable blade 24 is moved between the lowered position and the raised position as the cutting cylinder 25 expands and contracts. To move up and down.

  In this embodiment, the rod 25i of the cutting cylinder 25 is linked to the movable blade 24 via the connecting shaft 25n. However, in other embodiments, the connecting shaft 25n is omitted and the rod 25i is omitted. May be directly linked to the movable blade 24.

  As shown in FIG. 9, the pressure-increasing cylinder 26 is built in a vertical orientation at one side end of the shearing head 22, and a large cylinder 26 'and a small cylinder 26 "having a smaller diameter than the large cylinder 26' are arranged in series. The high pressure oil for driving the cutting cylinder 25 is generated from the low pressure air, that is, the pressure increasing cylinder 26 is an air pressure supplied from an air supply source (not shown) such as a compressor. Is a cylinder that generates a hydraulic pressure that is increased several times (in this example, twice), and the pressure increase ratio is equal to the ratio of the pressure receiving area of the large diameter piston 26e and the pressure receiving area of the small diameter piston 26n. .

  As shown in FIG. 9, the large cylinder 26 'of the pressure-increasing cylinder 26 is slid in an airtight state through a vertical large-diameter cylinder hole 26a formed in the shearing head 22 and an O-ring 26b through the large-diameter cylinder hole 26a. A large-diameter piston 26e that is movably inserted and divides the large-diameter cylinder hole 26a into a low-pressure pressurizing chamber 26c and an air chamber 26d, and is fixed to the upper end surface of the shearing head 22 by a fixing bolt 29. A cover 26f that is closed, an air supply / discharge port 26g of working air that is formed in the cover 26f and communicates with the low-pressure pressurization chamber 26c, a pipe joint 26h for low-pressure air connected to the air supply / discharge port 26g, and the shearing head 22 And an air vent hole 26i that opens the air chamber 26d to the atmosphere.

  On the other hand, as shown in FIG. 9, the small cylinder 26 ″ of the pressure increasing cylinder 26 is formed on the bottom surface of the large diameter cylinder hole 26a so as to have a smaller diameter than the large diameter cylinder hole 26a, and communicates in series with the large diameter cylinder hole 26a. The small-diameter cylinder hole 26j and the small-diameter cylinder hole 26j are slidably inserted in an airtight state through the O-ring 26k, and the distal end side (lower end side) of the small-diameter cylinder hole 26j is filled with hydraulic oil. A pressure increasing chamber 26l is formed, a small diameter piston 26n connected to the large diameter piston 26e via a piston rod 26m, and a lower end surface of the shearing head 22. The cutting cylinder 25 communicates with the pressure increasing chamber 26l. And a hydraulic oil pipe joint 26p connected to the oil supply / discharge port 26o.

  As shown in FIGS. 7 and 9, the oil passage 27 is formed by connecting a cutting cylinder 25 and a pressure increasing cylinder 26 in a communicating manner and filled with hydraulic oil for operating the cutting cylinder 25. The forward side pipe joint 25k of the cylinder 25 and the hydraulic oil pipe joint 26p of the pressure increase cylinder 26 are connected by a metal pipe 27a, and the pressure increase of the pressure increase cylinder 26 is made in the forward side chamber 25e of the cutting cylinder 25. It is formed by filling hydraulic oil in the chamber 26l and a metal pipe 27a.

  Note that an air supply source (not shown) such as a compressor is connected to the return side pipe joint 25m of the cutting cylinder 25 and the low pressure air pipe joint 26h of the pressure increasing cylinder 26 via a pipe (not shown). The working air is supplied from an air supply source.

  As shown in FIGS. 9 and 11, the presser mechanism 28 includes a pair of block-shaped guide bodies 28a fixed to one side surface of the movable blade 24 by a fixed bolt 29 with a predetermined interval, and each guide body 28a. A pair of support rods 28b that are inserted and supported so as to freely move up and down, urethane fixed to the upper end of the support rod 28b in parallel with the fixed blade 23, and in contact with the lower surfaces of the strip metal thin plates W1 and W2 in a surface contact state. An elastic body 28e (compression coil spring) interposed between the pressing plate 28d with the cushion material 28c attached and the guide bodies 28a and the pressing plate 28d and urging the pressing plate 28d toward the strip metal thin plates W1 and W2. ).

  Further, the presser mechanism 28 is in a state in which the surface of the cushion material 28c attached to the pressing plate 28d protrudes from the cutting edge 24a of the movable blade 24 toward the strip metal thin plates W1 and W2 by the elastic force of the elastic body 28e. When the movable blade 24 is lifted by the cutting cylinder 25, the pressing plate 28d is elastically applied to the lower surfaces of the strip metal thin plates W1 and W2 via the cushion material 28c before the movable blade 24 is lifted. In contact with each other, the belt-like metal thin plates W1 and W2 are sandwiched and fixed by the fixed blade 23 and the pressing plate 28d.

  4 and 5, 31 is a shearing cover, and 32 is a scrap shooter.

  Next, the cutting end 3 of the preceding strip-shaped metal thin plate W1 flowing on the line or the starting end portion of the new succeeding strip-shaped thin metal plate W2 is cut using the cutting device 3 of the above-described strip-shaped metal sheet butt joining device. Will be described.

  First, the cutting device 3 in the standby position is moved forward by the cutting device front / rear unit 16 and pulled out to the cutting work position.

  Next, the terminal end of the preceding strip-shaped metal thin plate W1 or the start end of the subsequent strip-shaped thin metal plate W2 is inserted between the fixed blade 23 and the movable blade 24 in the lowered position. The cutting cylinder 25 is operated to raise the movable blade 24 from the lowered position to the raised position.

  That is, when low-pressure air is supplied from an air supply source (not shown) to the low-pressure pressurizing chamber 26c of the pressure-increasing cylinder 26, the air in the air chamber 26d of the pressure-increasing cylinder 26 is discharged into the atmosphere from the air vent hole 26i. At the same time, the large cylinder 6 'extends.

  Along with this, the hydraulic oil in the pressure increasing chamber 26l of the small cylinder 6 ″ is increased and pushed out, and this reaches the forward side chamber 25e of the cutting cylinder 25 via the oil passage 27 (pipe 27a). Is extended to raise the movable blade 24 from the lowered position to the raised position.

  Then, the end portion of the preceding strip-shaped metal thin plate W1 or the start end portion of the subsequent strip-shaped metal thin plate W2 is cut along the width direction by the fixed blade 23 and the movable blade 24.

  At this time, since the belt-like metal thin plates W1 and W2 are sandwiched between the presser plate 28d of the presser mechanism 28 and the fixed blade 23, the belt-like metal blades W1 and W2 are cut by the blade edge 24a of the movable blade 24 when cutting the belt-like metal thin plates W1 and W2. The metal thin plates W1, W2 are not pushed and moved, and the strip metal thin plates W1, W2 can be cut with high accuracy. As a result, it is possible to perform the butt end of the cut preceding strip metal thin plate W1 and the start end of the subsequent strip metal thin plate W2 with high accuracy and perform precise butt welding.

  The cut and removed portion is discharged from the scrap shooter 32 and collected in the scrap case 10.

  In order to shorten the cutting cylinder 25, a switching valve (not shown) provided in an air circuit (not shown) is switched to discharge air pressure from the large cylinder 26 'and disconnect from an air supply source (not shown). The working air is supplied to the return side chamber 25f of the cylinder 25 for cutting, and the cutting cylinder 25 is shortened. As a result, the movable blade 24 is lowered from the raised position to the lowered position.

  With the shortening operation of the cutting cylinder 25, the hydraulic oil in the forward side chamber 25e of the cutting cylinder 25 is returned to the pressure increasing chamber 26l of the small cylinder 6 ″ through the oil passage 27 (pipe 27a), and the large cylinder 6 ′ is Shorten.

  As described above, the cutting device 3 of the belt-like sheet metal butt-joining device described above is connected to the cutting cylinder 25 that moves the movable blade 24 up and down by interlockingly connecting the pressure increasing cylinder 26 that is operated by air pressure. Since the pressure cylinder 26 is connected to the pressure cylinder 26 by an oil passage 27 filled with hydraulic oil, the cutting cylinder 25 is operated by the incompressible hydraulic oil when the strip-like metal thin plates W1 and W2 are cut. As a result, the movable blade 24 does not move suddenly and makes a loud sound, and the noise generated when the strip metal thin plates W1 and W2 are cut can be greatly reduced.

  Further, the cutting device 3 of the strip metal thin plate butt joining device has a configuration in which the pressure increasing cylinder 26 formed by connecting the large cylinder 26 ′ and the small cylinder 26 ″ in series is built in the shirring head 22, so that the installation space is reduced. The oil passage 27 connecting the cutting cylinder 25 and the pressure-increasing cylinder 26 is shortened, the piping work is simplified, and the cost can be reduced. .

  In the above embodiment, the fixed blade 23 is disposed above the inner peripheral edge of the opening 21 of the shearing head 22, and the movable blade 24 is disposed below the inner peripheral edge of the opening 21 of the shearing head 22. However, in another embodiment, the fixed blade 23 is positioned below the inner peripheral edge of the opening 21 of the shearing head 22, and the movable blade 24 is positioned above the inner peripheral edge of the opening 21 of the shearing head 22. May be provided respectively.

  1 is a work table, 2 is a cabinet body, 3 is a cutting device, 4 is a lower jig table, 5 is a back bar, 6 is a work clamp, 7 is an upper clamp, 8 is a welding device, 8a is a TIG welding torch, 9 Is a rolling machine, 10 is a scrap case, 11 is a polishing machine, 12 is an operation panel, 13 is an operation switch, 14 is a foot lock, 15 is a caster, 16 is a front / rear unit for a cutting device, 17 is a fixed base, 18 is a linear guide , 18a is a guide rail, 18b is a slider, 19 is a moving table, 20 is a fluid pressure cylinder, 21 is an opening, 22 is a shearing head, 23 is a fixed blade, 23a is a blade of a fixed blade, 24 is a movable blade, 24a is movable The cutting edge of the blade, 25 is a cutting cylinder, 25a is a cylinder tube, 25b is a head cover, 25c is a rod cover, 25d is an O-ring, 25e is Moving side chamber, 25f is a return side chamber, 25g is a piston, 25h is a rod packing, 25i is a rod, 25j is a forward side port, 25k is a forward side fitting, 25l is a backward side port, and 25m is a backward side pipe. 25 n is a coupling shaft, 26 is a pressure increasing cylinder, 26 ′ is a large cylinder, 26 ″ is a small cylinder, 26 a is a large diameter cylinder hole, 26 b is an O-ring, 26 c is a low pressure pressurizing chamber, 26 d is an air chamber, 26 e Is a large diameter piston, 26f is a cover, 26g is an air supply / exhaust port, 26h is a pipe joint for low pressure air, 26i is an air vent hole, 26j is a small diameter cylinder hole, 26k is an O-ring, 26l is a pressure increasing chamber, and 26m is a piston rod , 26n is a small-diameter piston, 26o is an oil supply / discharge port, 26p is a hydraulic oil pipe joint, 27 is an oil passage, 27a is a pipe, 28 is a holding mechanism, 28a is a guide body, and 28b is a support rod. 28c is a cushioning material, 28d is a pressing plate, 28e is an elastic body, 29 is a fixing bolt, 30 is a holding plate for a movable blade, 31 is a shearing cover, 32 is a scrap shooter, W1 is a preceding strip metal sheet, W2 is A trailing strip metal sheet.

Claims (4)

  The cutting ends of the pair of strip metal sheets (W1) and (W2) cut along the width direction by the cutting device (3) are butted against each other, and the pair of strip metal sheets (W1) and (W2) that are butted are pressed. In the butt-joining apparatus for the strip-shaped metal thin plate in which the butt portion is joined by butt-welding with the welding device (8) in this state, the cutting device (3) includes the strip-shaped metal thin plates (W1) and (W2). A shearing head (22) having an aperture (21) that can pass through, and an inner peripheral edge of the opening (21) of the shearing head (22) fixed in a posture along the width direction of the strip metal thin plates (W1) and (W2) The fixed blade (23) and the shearing head (22) are provided so as to be vertically movable in a posture along the fixed blade (23), and the strip-like metal thin plates (W1) and (W2) are provided in cooperation with the fixed blade (23). Cut along the width direction A movable blade (24) that is provided, a cutting cylinder (25) that is provided on the shearing head (22) and moves the movable blade (24) up and down, and a pressure increasing cylinder that is provided on the shearing head (22) and that is operated by air pressure. (26) and an oil passage (27) filled with hydraulic oil for connecting the cutting cylinder (25) and the pressure increasing cylinder (26) in communication and operating the cutting cylinder (25). A strip-shaped metal sheet butt-joining apparatus characterized by the above.   The belt-like metal sheet butt joining apparatus according to claim 1, wherein the pressure-increasing cylinder (26) is built in the shearing head (22).   The pressure-increasing cylinder (26) has a large cylinder (26 ') and a small cylinder (26 ") provided in series in a shearing head (22), and the large cylinder (26') is a shearing head. The large-diameter cylinder hole (26a) formed in (22) and the large-diameter cylinder hole (26a) are slidably inserted in an airtight state, and the large-diameter cylinder hole (26a) is inserted into the low-pressure pressurization chamber (26c) and air. The small cylinder 26 ″ includes a large-diameter piston (26e) partitioned into a chamber (26d) and an air supply / discharge port (26g) for working air communicating with the low-pressure pressurizing chamber (26c). The small diameter cylinder hole (26j) communicated in series with the large diameter cylinder hole (26a) and the small diameter cylinder hole (26j) are slidably inserted into the small diameter cylinder hole (26j). Ahead A pressure increasing chamber (261) filled with hydraulic oil is formed on the part side, and a small diameter piston (26n) connected to the large diameter piston (26e) via a piston rod (26m), and a pressure increasing chamber (261) 3. The butt of the strip-shaped metal sheet according to claim 1, further comprising an oil supply / discharge port (26 o) for hydraulic oil connected to the cutting cylinder (25) in communication with the cutting cylinder (25). Joining device.   The movable blade (24) is provided with a presser mechanism (28) for holding the belt-shaped metal thin plates (W1), (W2) between the movable blade (24) and the fixed blade (23) when the strip-shaped metal thin plates (W1), (W2) are cut. The presser mechanism (28) is fixed to the support rod (28b) supported by the movable blade (24) in a vertically movable manner and the support rod (28b), and is in surface contact with the strip-shaped metal thin plates (W1) and (W2). A pressing plate (28d) to which a cushioning material (28c) capable of abutting is attached, and an elastic body (28e) for urging the pressing plate (28d) toward the strip-shaped metal thin plates (W1) and (W2). The cushion material (28c) of the pressing plate (28d) protrudes toward the strip metal thin plates (W1) and (W2) from the movable blade (24) by the elastic force of the elastic body (28e). The apparatus for butt-joining strip metal sheets according to claim 1.

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