KR100862014B1 - Elbow Manufacturing Apparatus and Method of Spiral Duct - Google Patents

Abstract

The present invention intends to manufacture the elbow connecting the straight duct and the duct in a spiral duct, the step of bending the protruding corrugated portion of the metal plate cut straight and corrugated continuously by the ball caster bent upwards And transferring the metal sheet by a pair of feed rollers rotated by a first motor drive installed in the helical duct manufacturing apparatus, wherein the conveyed metal sheet is wound in a circular shape by a multi-joint jig, and the upper and lower compression rollers. The step of pressing the single folded portion and the double folded portion, characterized in that consisting of the step of cutting the elbow formed in the spiral duct manufacturing apparatus with the upper and lower cutters.

The present invention is capable of forming an elbow drawing a gentle curve, and by bending the protruding waveform of the metal sheet to form the elbow to smooth the flow of fluid flowing through the elbow, elbow production by molding the elbow in a continuous process It has a useful effect of increasing the productivity efficiency.

Corrugation bend, feeder, cutting part, articulated jig

Description

Elbow Manufacturing Apparatus and Method for Manufacturing the Spiral Duct {Elbow Manufacturing Apparatus and Method of Spiral Duct}

Figure 1 shows a conventional spiral duct manufacturing apparatus,

Figure 1a is a cross-sectional view.

Figure 1b is a front view cut a part.

Figure 1c is a perspective view showing a molded part.

1D is a perspective view showing a cut portion.

1E is a side view showing an operating state.

Figure 2a is a side view showing a device for manufacturing a spiral duct filed by the applicant.

Figure 2b is a side view showing the apparatus for producing a spiral duct filed by the applicant.

Figure 3a is a front view showing the elbow manufacturing apparatus of the spiral duct according to the present invention.

Figure 3b is a plan view showing the elbow manufacturing apparatus of the spiral duct according to the present invention.

Figure 4 shows the elbow manufacturing apparatus of the present invention,

4A is a front view.

4B is a plan view of FIG. 4A.

4C is a side view of FIG. 4A.

4D is a side cross-sectional view of FIG. 4A.

5 is a view showing a curved portion of the present invention,

5A is a front view.

Fig. 5B is a plan view of Fig. 5A.

Fig. 5C is an enlarged view showing the ball caster of the corrugation bend.

5D is a plan view of FIG. 5C.

Fig. 5E is a side cross-sectional view of Fig. 5D.

5F is a side view of FIG. 5D.

Figure 6 shows the forming and cutting of the present invention,

Figure 6a is a front view of the fixing device for fixing the articulated jig of the present invention.

Fig. 6B is a plan view of Fig. 6A.

6C is a side view of FIG. 6B.

6D is a side cross-sectional view of FIG. 6B.

6e to 6h illustrate the main portion of the fixing device for fixing the articulated jig of the present invention,

6E is a front view.

Fig. 6F is a plan view of Fig. 6E.

Fig. 6G is a right side view of Fig. 6E.

Figure 6h is a left side view of Figure 6e.

7 is a front view and a side view showing the articulated jig of the present invention.

Figure 8 is an enlarged view showing the forming and cutting of the elbow manufacturing apparatus of the present invention,

8A is a front view.

Fig. 8B is a right side view of Fig. 8A.

8C is a side cross-sectional view of FIG. 8A.

9 is a process chart showing the manufacturing method of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: uncoiler 200: waveform cutout

210: first slope forming roll 220: second slope forming roll

230: third inclined forming roll 240: gold squeeze roll

250: vertical forming roll 260: partitioning roll

270: inward inclined forming roll 280: second edge forming roll

290: guide roll 300: primary feed unit

400: wave form bend 410: detection sensor

420: ball caster 421: linear guide

422: upper ball caster 423: lower ball caster

424: inclined plate 425: cam

500: secondary transfer unit 510: first motor

520: universal joint 530: feed roller

531: upper frame 532: first adjustment lever

600: forming and cutting unit 610: second drive motor

615: encoder 616: idle sprocket

620: first gear 621: second gear

622: lower pressing roller 623: third gear

624: upper compression roller 640: fixing device

641: pedestal 642: brace

643: horizontal guide rail 644: moving port

645 vertical guide rail 646 moving port

650: articulated jig 651: split piece

652: Self-aligning bearing 653a, 653b: Cylinder

654: moving plate 660: cutter

661: upper cutter 662: lower cutter

663: frame 664: hinge axis

665: link 666: the first cylinder

667: rail 668: link

669: second cylinder 670: rotating device

671: driven gear 672: drive gear

673: servo motor

The present invention relates to an elbow manufacturing apparatus and a method of manufacturing the elbow of the spiral duct, and more particularly to the elbow connecting the bent portion between the duct and the spiral duct manufactured by cutting the metal plate into a wave shape and then wound into a spiral cylindrical shape. The present invention relates to an elbow manufacturing apparatus for forming a spiral duct and a method of manufacturing the same.

In general, spiral ducts are used throughout the industry, such as air conditioners and powder conveying pipelines.

The apparatus for manufacturing a spiral duct is formed by bending a sheet metal wound on a reel stand sequentially through a plurality of rows of compression rollers, and bending both ends of the sheet metal in a reverse direction, and bending both ends of the bent sheet. When forming the cylinder by pressing a pair of compression rollers while fitting the parts together, three to five protruding guide rods installed along the circumference of the cylinder support and guide the circumference to form a continuous spiral duct. When the molded helical duct is molded to a predetermined length, it is configured to cut with a circular cutter.

In addition, in the process of manufacturing the helical duct, the driving of the compression roller for bending both ends of the plate and the driving of the compression roller for pressing both ends of the plate are separated in order to compensate for the speed by a drive method using a plurality of gears or chains, respectively. .

The manufacturing apparatus of such a spiral duct is disclosed in the Republic of Korea Utility Model Publication No. 2000-19065 (hereinafter referred to as "prior art 1") of the manufacturing apparatus of the spiral duct, which is shown in Figures 1a to 1e.

As shown in FIG. 1, the spiral duct manufacturing apparatus of the prior art 1 passes a metal plate 18 supplied from a reel stand 19 through a bending roller 21 arranged in a plurality of rows of the plate 18. A device for bending ducts, pressing both ends of the bent plate member 18 with a compression roller 31 to form a cylindrical duct, and cutting the molded duct with a circular saw blade 42 to produce a duct. An outlet side of the bending roller 21 is connected to the cylinder 25, the lower roller 24 is operated up and down, and disposed in the upper portion corresponding to the lower roller 24, and transmits power by the drive motor 26. The conveying part 2 which comprises a pair of drive rollers 22 which consists of receiving upper rollers 23 is provided on the 1st table 11.

In addition, a pair in which the tip of the lever 33 to which the bolt 32 for adjusting the pressing force for engaging the bent portions 18a and 18b of the plate 18 supplied from the conveying unit 2 is coupled to the upper roller is coupled. The compression roller 31 and the guide roller 35 for guiding the duct 17 formed in the cylinder while passing through the compression roller 31 is formed of a circular frame 34 formed to be corrugated in the inner diameter in a spiral shape The part 3 is provided in the 2nd table 12. As shown in FIG.

In addition, the operation plate 41 which is positioned below the molding unit 3 and slides on the second table 12 is installed, and the duct formed by the bracket 46 is installed at the tip of the operation plate 41. A circular saw blade 42 for cutting the combination is coupled, the cutting portion 4 is provided with a motor 43 and a cylinder 44 for operating the circular saw blade 42 to rotate and move up and down, respectively, the second table ( 12) is installed.

In addition, a cylinder 47 for moving the cutting unit 4 for cutting the formed duct 17 and returning it to its original position is installed above the second table 12, and the first table 11 and the second table 12 are installed. ) Is connected between the guide plates (5).

The spiral duct manufacturing apparatus according to the prior art is a spiral duct is manufactured by winding a metal band supplied at an oblique angle in a cylindrical shape.

However, this spiral duct manufacturing apparatus is suitable for manufacturing a straight spiral duct, but there is a disadvantage that cannot be manufactured elbow-shaped spiral duct that must be bent at an angle depending on the place where the duct is installed.

In addition, Patent Application No. 2006-28859 filed by the present applicant (hereinafter referred to as "prior art 2") discloses a manufacturing apparatus and a manufacturing method of the spiral duct, which is shown in FIG.

As shown in Fig. 2, the prior art 2 has emerged from the first edge forming roll 10 and the first edge forming roll 10 for forming the double folded portions 31 at both edge portions of the metal bands. In order to cut the metal band 30 in a waveform or straight line along the longitudinal direction, the cutting roll 20 and the cut metal band 30 are installed in a spiral form so that the horizontal rotation angle is periodically varied, and the single folding portion ( 32) and a seam device 50 for coupling the double folds 31 together.

Such a spiral duct manufacturing apparatus can produce elbows as well as straight spiral ducts, but since the outer periphery of the elbows are molded into straight lines at equal intervals, the elbows are not shaped into a gentle curve, and are bent in a straight multiangle. There was a problem of being molded into elbows.

The present invention has been made to solve the above problems, an object of the present invention is to provide an elbow manufacturing apparatus of the helical duct to manufacture the elbow connecting the duct and the duct in a spiral duct and a manufacturing method thereof There is.

In addition, another object of the present invention is an elbow manufacturing apparatus of the spiral duct for producing a smooth curved elbow by cutting the metal plate wound in a reel form into a wave form and then bent the protruding portion of the wave form and its manufacture To provide a way.

In order to achieve the above object, the elbow manufacturing apparatus of the helical duct of the present invention is a curved wave bent portion to bend the upper portion of the protruding corrugated portion of the metal plate is supplied in a straight line and the waveform is continuously cut, the metal curved wave It comprises a conveying unit for conveying the sheet material, a seam device made of a molding and cutting portion is formed by cutting the elbow is formed by pressing the metal plate conveyed from the conveying member in a spiral cylinder.

In addition, the elbow manufacturing method of the helical duct of the present invention is a step of bending the protruding corrugated portion of the metal plate cut in a straight line and the wave continuously by a ball caster, the first motor installed in the spiral duct manufacturing apparatus Transporting the metal sheet by a pair of conveying rollers which are rotated by a drive, wherein the conveyed metal sheet is wound in a circular shape by a multi-joint jig and presses a single fold portion and a double fold portion with upper and lower pressing rollers. , Cutting the elbow formed by the spiral duct manufacturing apparatus with an upper and lower cutters.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 3a is a front view showing the elbow manufacturing apparatus of the spiral duct according to the present invention, Figure 3b is a plan view showing the elbow manufacturing apparatus of the spiral duct according to the present invention, Figure 4 shows the elbow manufacturing apparatus of the present invention 5 is a view showing a curved portion of the present invention, Figure 6 is a view showing the forming and cutting of the present invention, Figure 7 shows the main portion of the fixing device for fixing the articulated jig of the present invention. 8 is an explanatory view and a side view of the articulated jig of the present invention, Figure 9 is an enlarged view showing the forming and cutting of the elbow manufacturing apparatus of the present invention.

As shown in Figures 3 to 9, the elbow manufacturing apparatus of the present invention is a waveform for cutting the uncoiler 100 and the metal plate supplied from the uncoiler 100 to a corrugated shape to supply a metal plate having a predetermined width. Waveforms for bending upwardly the protruding waveforms of the metal plate material transferred from the primary feeder 300 and the primary feeder 300 to transfer the metal sheet from the cutout portion 200, the waveform cutout 200, and the waveform cutout 200. After bending the bent part 400 and the metal plate, the second conveying part 500 for pulling the metal plate and the forming and cutting part 600 for shaping and then cutting the metal plate material supplied from the secondary conveying part 500 into elbows. Is done.

In addition, the uncoiler 100 is wound with a metal plate for forming a spiral duct. As shown in FIGS. 3A and 3B, the metal plate has a corrugated curved portion 400, a secondary conveying portion 500, and a molding and cutting portion 600 symmetrically installed on the upper and lower sides.

The elbow manufacturing apparatus of the helical duct is to shape the two metal plates cut in the corrugated cut portion 200 to the elbow, respectively, thereby simultaneously molding the two cut metal plates to the elbow.

In addition, since the waveform cutting unit 200 is disclosed in Patent Application No. 2006-28859 filed by the present applicant, it will be briefly described in the present invention.

The corrugated cut portion 200 includes a first inclined forming roll 210 to flatten the metal sheet supplied from the uncoiler 100, a second inclined forming roll 220 to slightly bend the edge of the metal sheet downward, and a lower portion thereof. The first edge forming roll made of the third inclined forming roll 230 is formed to bend the edge of the metal plate bent upward again to form a double contact portion.

Along with this, the corrugated cut portion 200 is provided with a gold slit roll 240 for drawing a wave of gold on a metal sheet, and a vertical forming roll 250 for vertically forming an edge of the inclined metal sheet.

In addition, the corrugated cut portion 200 is provided with a partitioning roll 260 for cutting and dividing along the longitudinal direction of the metal plate, the partitioning roll 260 is a single '-' shape at the edge at the same time as the wave cutting of the metal plate Form a fold. Next to this partitioning roll 260 is an inwardly inclined forming roll 270 is installed to bend the edge of the vertically standing metal plate inward.

Along with this, the corrugated cut portion 200 is provided with a second edge forming roll 280, which bends the corrugated edges of the metal sheet to both sides to form a single cut portion, and guide rolls 290 for discharging two metal sheets discharged. This is installed.

In addition, the waveform cutting unit 200 is installed after the primary transfer unit 300 made of a conveyor so that the cut metal plate is stably transferred.

In addition, the elbow manufacturing apparatus of the helical duct, the corrugated bend 400, the secondary feeder 500, the forming and cutting 600 is installed up and down symmetrically as shown in Figure 3b, the same name for the symmetrical parts It demonstrates using a sign.

As shown in FIGS. 4 and 5, the waveform bent part 400 is provided with a detection sensor 410 for detecting a portion where a waveform starts from a metal plate that is cut and supplied in a separated state. The sensor 410 is elastically installed by the spring 411 so as to retreat and advance along the waveform.

Along with this, the curved portion 400 is provided with a ball caster 420 to bend round a portion of the curved portion protruding to the separated metal plate. The ball caster 420 is installed to be movable by the linear guide 421 as shown in Figures 4 and 5, the ball caster 420 is installed to be in contact with each other up and down.

The ball caster 420 is composed of an upper ball caster 422 and a lower ball caster 423, the lower ball caster 423, as shown in Figure 5c to 5f, the corrugated portion of the cut metal plate It is installed so as to retreat toward the linear guide 421 by the.

An inclined plate 424 which is inclined upward is fixed between the lower ball caster 423 and the linear guide 421, and a cam 425 which is elevated along the inclined plate 424 is movable on one side of the lower ball caster 423. Is installed.

In addition, the ball caster 420 is provided with a secondary transfer unit 500 for pulling and transporting the metal plate.

As shown in FIGS. 4 to 5, the secondary transfer part 500 is a pair of transfer rollers 530 which are connected to and rotated by the first motor 510 and the universal joint 520 driven by an applied power source. ) Is installed.

In addition, the conveying roller 530 of the secondary conveying unit 500 is installed to be adjustable according to the thickness of the supplied metal plate or the height of the metal plate, the height of the conveying roller 530 on the upper frame 531 The first adjusting lever 532 for adjusting is installed.

In addition, the forming and cutting unit 600 is provided with a cutting unit 600 for cutting the elbows while molding the elbows in a spiral cylindrical shape of the metal plate supplied in a state in which both sides are bent.

As shown in FIGS. 4C and 4D, the molding and cutting unit 600 is provided with a second driving motor 610 that generates power, and is supplied while transmitting a rotational force on the second driving motor 610. The encoder 615 for measuring the length of the metal plate is installed, the power transmission means is connected to each of the second drive motor 610 and the encoder 615 by a chain connected to the sprocket installed.

In addition, as shown in FIGS. 4C, 5A, and 6A, the encoder 615 is connected to a power transmission means chained to an idle sprocket 616 so as to transmit rotational force, and the sprocket 616 is connected to the encoder 615. The first gear 620 for transmitting the rotational force is integrally formed.

In addition, as shown in FIG. 4A, the second gear 621 is engaged with the first gear 620, and the lower compression roller 622 compresses the connection portion of the helical duct to the shaft end of the second gear 621. ) Is installed.

In addition, the third gear 623 is engaged to the upper portion of the second gear 621, the upper compression roller 624 for pressing the connecting portion of the helical duct to the end of the shaft, the lower compression roller 622 It is installed so as to be close to.

The lower pressing roller 622 and the upper pressing roller 624 are to compress the double folded portion and the single folded portion that is bent at the edge of the metal plate, the lower pressing roller 622 is formed with a groove.

Along with the upper and lower compression rollers 622 and 624, as illustrated in FIGS. 4C and 7, the articulated jig 650 is installed, and a fixing device 640 for fixing the articulated jig 650 is installed. do.

As shown in FIGS. 6A to 6H, the fixing device 640 is provided with a brace 642 on an upper surface of the pedestal 641, and a horizontal guide rail 643 is installed on the brace 642, and a guide rail. The mover 644 which is horizontally moved is coupled to the 642.

In addition, a vertical guide rail 645 is vertically installed at the tip of the movable tool 644, and a vertically movable movable tool 646 is coupled to the vertical guide rail 645, and the vertical guide rail of the fixing device 640 is coupled thereto. A lower portion of the 645 is provided with a multi-joint jig 650 for molding the supplied metal sheet into a spiral cylindrical shape.

As shown in FIG. 7, the articulated jig 650 has a circular shape with a portion open, and the articulated jig 650 is coupled in a plurality of separated states. That is, the articulated jig 650 is cut and divided at different angles, and the divided pieces 651 are combined with a self-aligning ball bearing (652) so that the flow is made in a state adjacent to each other.

In addition, the divided pieces 651 are provided with cylinders 653a and 653b to which the self-aligning bearings are coupled to adjust the lengths on both the left and right sides, respectively. It is fixed to the movable tool 646 which is coupled to the vertical guide rail 645 of 640.

One side of the articulated jig 650 is fixedly installed with a moving plate 654 bent toward the inner ring of the articulated jig 650 to be transported in a metal plate bite state.

In addition, the elbow manufacturing apparatus of the spiral duct, as shown in Figures 4 and 8, the cutter 660 for cutting the elbow formed on the front of the fixing device 640 is installed. The cutter 660 includes an upper cutter 661 installed at an upper portion and a lower cutter 662 provided at a lower portion.

Since the upper cutter 661 and the lower cutter 662 are installed to overlap each other, as shown in Figure 8, the upper cutter 661 is installed to protrude from the elbow manufacturing apparatus, so as not to interfere with the elbow being formed. It is installed to be lifted to the top.

That is, the upper cutter 661 is installed on one side of the frame 663, as shown in Figure 8, a hinge shaft 664 coupled with a bearing to be the center point of rotation is installed below the frame 663, the frame 663 Link 665 is installed on the other side thereof so as to rotate about one end.

In addition, the link 665 is provided with a first cylinder 666 for advancing and retracting the link 665.

Along with this, the lower cutter 662 is provided with a rail 667 perpendicular to the lower portion thereof, and a link 668 for elevating the lower cutter 662 is installed at one side of the rail 667, as shown in FIG. 4B. The link 668 is provided with a second cylinder 669 for horizontally moving the link 668.

In addition, the bottom of the frame 663 is provided with a rotating device 670 for rotating the frame 663 by a predetermined angle. The rotary device 670 is provided with a driven gear 671 having a tooth formed at a predetermined angle on one side of the bottom surface of the frame 663, the drive gear 672 is meshed with the driven gear 671, the drive gear 672 At the top, a servo motor 673 that rotates the drive gear 672 is coupled.

Of course, the elbow manufacturing apparatus of the spiral duct is provided with a controller for totally controlling the elbow manufacturing apparatus to form the spiral duct.

The elbow manufacturing apparatus of the helical duct of the present invention having such a configuration is installed so that the metal sheet continues to be supplied by hanging the metal sheet continuously wound on the uncoiler 100.

The metal plate is manually fixed to the ball caster 420, the feed roller 530, and the articulated jig 650 through the corrugated cut portion 200 and the primary transfer portion 300 by a worker.

As such, when the installation of the metal plate is completed by the worker, the metal plate wound on the uncoiler 100 is pulled by the corrugated cut part 200 and continuously supplied (S10).

In this way, the metal sheet supplied to the corrugated cut portion 200 is bent at both edges of the metal sheet by the guide rolls 290 installed in series from the first inclination forming roll 210, and the wavy portion of the metal sheet is wavy. To be cut, the bent two metal plate edges are cut (S11).

At this time, the metal plate to be cut is cut by adjusting the length cut in a straight line and waveform according to the size of the elbow to be molded in the elbow manufacturing apparatus. That is, the metal sheet is cut in a straight line at the proper length in the center of the metal sheet, and the metal sheet is cut into a continuous waveform to form a spiral cylindrical shape, the waveform is cut in the formula calculated according to the diameter and size of the elbow By the appropriate number of divided waveforms.

As described above, the metal sheet cut into two pieces is conveyed by the corrugated bend 400 and the conveying roller 530 from the guide roll 290 to the primary conveying part 300 of the guide conveyor. (S12).

The detection sensor 410 installed in the elbow manufacturing apparatus of the helical duct detects that the portion cut into the waveform is input from the metal sheet cut in a straight line. That is, the sensing sensor 410 detects the start portion at which the metal sheet cut into the waveform is input and sends it to the encoder 615, and the encoder 615 transfers the length of the metal sheet conveyed according to the elbow to an appropriate length. Measured to supply.

Subsequently, the supplied metal sheet is supplied to the ball caster 420 of the corrugated bend 400, and in the ball caster 420, a straight portion of the metal sheet just passes, and when the corrugated portion of the metal sheet is supplied, it is shown in FIG. 5E. As shown, the cam 425 is retracted by the protruding corrugated portion of the metal sheet.

The retracted cam 425 is raised along the inclined plate 424 installed on the right side in the drawing, and is maintained until the protruding corrugated portion of the metal plate passes while the cam 425 is retracted. In the state in which the ball caster 423 is raised, the corrugated portion of the metal sheet is bent upward (S13).

In addition, the cam 425 is lowered along the inclined plate 424 when the recessed waveform of the metal sheet passes, as well as the cam 425 is lowered in the straight portion of the metal sheet, so only the protruding corrugated portion of the metal sheet is raised. It is bent upwards.

When the cam 425 protrudes the protruding corrugated portion of the metal sheet, the cam 425 is raised along the inclined plate 424 by the corrugated portion to bend the corrugated portion of the metal sheet upward, and elbow forming as the metal sheet is curved. The curved portion of the sea elbow will bend smoothly.

As shown in FIG. 5, the metal plate having passed through the ball caster 420 is transmitted to the feed roller 530 connected to the universal joint 520 by the rotational force generated by driving the first motor 510 and rotates. The metal plate is conveyed by the conveying roller 530 (S14).

The metal sheet thus transferred is supplied to the articulated jig 650, and the single and double folded portions of the metal sheet are compressed by upper and lower pressing rollers 622 and 624 installed at the lower positions of the articulated jig 650. The elbows of the helical ducts being crimped, swing along the curve of the waveform.

In this way, the upper cutter 661 is installed to protrude further forward than the articulated jig 650, and is lifted to avoid interference with the spiral duct that is shaken while being molded.

At this time, the upper cutter 661 maintains the state lifted upward by the first cylinder 666, and is rotated about one side of the link 665 as the first cylinder 666 retreats. The rotation of the link 664 causes the frame 663 to be lifted upwardly about the hinge axis 664 so that the upper cutter 661 is lifted.

In addition, the lower cutter 662, the second cylinder 669 is retracted, the lower cutter 661 is lowered along the rail 667 as the link 668 is retracted as the second cylinder 669 is retracted. .

The upper cutter 661 and the lower cutter 662 maintain the spaced up and down, respectively, while the elbow of the spiral duct is made in the articulated jig 650.

The metal plate thus supplied is formed into an elbow shape through the articulated jig 650, and the elbow of the spiral duct is curved by the ball caster 420, as shown in FIG. The outer periphery is molded into a curved surface that draws a gentle curve rather than a polygonal shape that is bent in a straight line (S15).

When the elbow is formed, the encoder is cut by using a cutter installed in front of the articulated jig 650 when the elbow is molded by the length of the elbow to be formed by calculating the length separately from the length cut by the corrugated cut part 200. .

When the elbow molding is completed in this way and the boss having an elbow is formed in a straight section, the upper and lower cutters 661 and 662 are engaged to cut the elbow, and the rotating device 670 is rotated to cut the elbow in a straight line.

The rotation angle of the rotating device is rotated according to the calculated value according to the elbow, the rotation angle is in the range of 0 ~ 33 ° is controlled to an appropriate angle according to the size of the elbow.

The rotation of the rotary device 670 is driven by the power applied to the servo motor 673, the drive gear 672 is rotated, and the driven gear 671 meshed with the drive gear 672 is rotated frame 663 The whole is rotated to rotate the upper cutter 661 and the lower cutter 662.

By cutting the elbows while the upper and lower cutters 661 and 662 are rotated in this manner, the elbows are cut in a straight line (S16).

After the elbow is cut as described above, the metal sheet is continuously supplied from the uncoiler 100 to repeat the process of forming the elbow, thereby forming the elbow continuously.

The present invention is capable of forming an elbow drawing a gentle curve, and by bending the protruding waveform of the metal sheet to form the elbow to smooth the flow of fluid flowing through the elbow, elbow production by molding the elbow in a continuous process It has a useful effect of increasing the productivity efficiency.

Claims (20)

Corrugated bend to bend upwardly the protruding corrugated portion of the metal sheet supplied with the straight line and the corrugated wave continuously, Transfer unit for transferring the curved metal plate, The elbow manufacturing apparatus of the helical duct, characterized in that it comprises a forming and cutting unit for pressing and forming the elbow is formed by cutting while forming the metal plate conveyed in the conveying portion in a spiral cylindrical shape. The method of claim 1, The corrugated bend is a ball caster that is curved forward and backward to be curved upwards of the metal plate is a straight line and the wave is continuously cut, A cam installed on one side of the ball caster to raise the ball caster retracted by the protruding corrugated portion of the metal plate, Elbow manufacturing apparatus of the spiral duct, characterized in that the inclined plate is installed so that the cam is elevated by the advancing and retracting of the ball caster. The method of claim 1, The conveying unit is an elbow manufacturing apparatus of the spiral duct, characterized in that the conveying roller is rotatably installed by a universal joint coupled to the first motor, the conveying roller is formed in a pair of upper and lower so that the metal plate is conveyed. The method of claim 1, The molding and cutting unit is a lower compression roller installed to rotate by receiving power from the second drive motor, An upper compression roller installed on the lower compression roller to pressurize the bent metal sheet; Fixing device is fixed to the articulated jig is installed on the upper pressing roller to form a metal plate material supplied from the transfer portion in a cylindrical shape, Cutter consisting of an upper cutter and a lower cutter on the front and the bottom of the pressing roller to cut the metal plate formed in a cylindrical shape in the articulated jig, Spiral duct elbow manufacturing apparatus, characterized in that the rotary device for rotating the cutter horizontally by the drive of the servo motor further. The method of claim 2, The elbow manufacturing apparatus of the helical duct is installed in the corrugated curved portion is provided with a sensor for detecting the protruding corrugated portion of the metal plate is supplied in a state that the straight line and the waveform is continuously cut. The method of claim 4, wherein The molding and cutting unit is provided with an idle sprocket connected to the power transmission means so that the power of the second drive motor, the encoder for measuring the length of the metal plate supplied by the rotation of the idle sprocket is provided with Elbow manufacturing apparatus of the spiral duct, characterized in that. The method of claim 4, wherein The fixing device is an elbow manufacturing apparatus of the spiral duct, characterized in that the movable tool is coupled to the vertical guide rail so that the articulated jig is fixed, the movable tool coupled to the horizontal guide rail is coupled to one side of the movable tool. The method of claim 4, wherein The articulated jig has a plurality of divided pieces divided into arcs, Self-aligning bearing coupled to the split piece and the split piece so as to move freely so that interference does not occur in the traveling direction of the elbow in which the articulated jig is molded, Elbow manufacturing apparatus of the spiral duct, characterized in that consisting of a cylinder extending to one side of each of the divided pieces so that the articulated jig flows. The method of claim 4, wherein The rotating device is a servo motor installed on one side of the frame, Drive gear rotated by the drive of the servo motor, Elbow manufacturing apparatus of the helical duct, characterized in that the drive gear is engaged with the drive gear to rotate the frame. The method according to any one of claims 6 to 9, The upper cutter is provided with a hinge shaft that is a rotation center in the lower portion of the frame, the link is rotated around the fixed end is installed on the other side of the frame, the link is provided with a first cylinder for advancing the link Elbow manufacturing device for spiral ducts. The method according to any one of claims 6 to 9, The lower cutter is provided with a rail vertically below the lower pressing roller, a link is installed on one side of the rail to the bottom cutter, and the link is provided with a second cylinder for horizontally moving the link elbow elbow Manufacturing equipment. The method of claim 8, The elbow manufacturing apparatus of the helical duct is installed on the divided piece of the articulated jig to be guided by a metal plate bent toward one side and the inner ring of the divided piece to enter the articulated jig. The method of claim 4, wherein The lower compression roller is integrally formed with a second gear and meshed with the first gear formed on the sprocket rotated by the second driving motor, Elbow manufacturing apparatus of the helical duct, characterized in that the upper gear roller is integrally formed with a third gear is meshed with the second gear. The method of claim 10, The upper cutter is an elbow manufacturing apparatus of the spiral duct, characterized in that the elbow is formed when the elbow is molded in the articulated jig and the link is pulled by the first cylinder so as not to be in contact with the elevating shaft is maintained. The method of claim 9, The rotating device is an elbow manufacturing apparatus of the spiral duct, characterized in that for rotating the frame in the range of 0 ~ 33 ° according to the length measured by the encoder to cut the elbow formed in the articulated jig in a straight line. The method of claim 1, An uncoiler wound continuously in front of the corrugated bent metal plate, The elbow manufacturing apparatus of the spiral duct, characterized in that the corrugated cutting portion for further cutting the metal plate supplied from the uncoiler in a straight line and a continuous waveform. Bending the protruding corrugated portion of the metal sheet cut straight and corrugated continuously by a ball caster, Transporting the metal sheet by a pair of feed rollers rotated by a first motor drive installed in the elbow manufacturing apparatus of the spiral duct, The conveyed metal sheet is wound in a circular shape by a multi-joint jig to press the single folded portion and the double folded portion with the upper and lower pressing rollers, Elbow manufacturing method of the spiral duct, characterized in that the step of cutting the elbow formed in the elbow manufacturing apparatus of the spiral duct with the upper and lower cutters. The method of claim 17, The step of bending the metal plate upwards detects that the protruding waveform of the metal plate enters with a detection sensor and sends a detected signal to the encoder, the encoder measures the length of the metal plate supplied, and the ball caster supplies A method of manufacturing an elbow of a spiral duct, characterized in that the lower ball caster of the ball caster is retracted along the protruding waveform of the metal plate. The method of claim 17, The pressing of the spiral duct is an elbow manufacturing method of the spiral duct, characterized in that the single folded portion and the double folded portion is pressed by the upper and lower pressing rollers while the metal sheet is supplied to the articulated jig. The method of claim 17, In the cutting step, the upper cutter is elbow manufacturing method of the spiral duct, characterized in that the frame is lifted around the hinge axis when forming the elbow, the lower cutter is lowered along the rail when forming the elbow.

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