KR100445612B1 - Apparatus and method for forming a 3D article having closed crosssectional portions from a metal plate and, device therein used for fixing folded portions - Google Patents

Abstract

The present invention is to provide a roll-forming sheet metal sheet mill for easily forming a three-dimensional product having a closed cross-section from a plate-shaped sheet metal sheet, sheet metal supply unit for supplying the sheet metal processing device to release the sheet metal from the sheet metal roll at an appropriate speed, and sheet metal And a production unit for forming a product having a desired shape by folding or folding the product, and a product shipment unit for cutting and shipping the finished product to an appropriate length, wherein the production unit has an initial stage having a straight cross section of the sheet metal supplied by the feeder 220. A series of forming rolls 230 which gradually deform from the state to the terminal state having the desired cross-sectional shape, and both end portions of the sheet metal that has been formed downstream of the last roll of the series of forming rolls 230 are joined to an intermediate portion. A joining means for completing a shape of the product having a closed cross section, said joining means along a longitudinal direction; Stamping rolls 270 continuously forming the stamp portion at regular intervals, the sheet metal supply portion includes a notching unit 250 for forming a crosswise notch for each predetermined length of the sheet metal, the product delivery unit is formed and bonded A downstream shear 280 for cutting the finished product by a desired length, the downstream shear 280 includes a knife reciprocating up and down by a hydraulic cylinder, the knife is the notching unit 250 And cut the product by digging into the notches formed with

Description

Roll forming type sheet metal processing apparatus for forming three-dimensional products with closed cross-section and method for forming three-dimensional products by using such sheet metal processing plant {Apparatus and method for forming a 3D article having closed cross section portions from a metal plate and, device therein used for fixing folded portions}

The present invention relates to a sheet metal processing apparatus, and more particularly, to a roll forming sheet metal processing apparatus for folding a sheet metal to form a three-dimensional product of the same cross-sectional shape over the entire length.

Roll-forming sheet metal processing apparatuses are useful in folding sheet metal to form three-dimensional products having the same cross-sectional shape over the whole length.

1 shows a side view of a conventional roll forming sheet metal working apparatus, and FIG. 2 shows a plan view thereof. As shown in Figures 1 and 2, the conventional roll-forming sheet metal processing apparatus 100 has an uncoiler (110; uncoiler) and an uncoiler (110) for stacking the sheet metal roll and releasing the sheet metal from the sheet metal roll at an appropriate speed. Feeder (120; feeding apparatus) for supplying the sheet metal released from the) to the processing line, and a series of gradually transforming the sheet metal supplied by the feeder 120 from the initial state having a straight cross-section to the end state having a desired cross-sectional shape A series of forming rolls 130, and a run-out conveyor 140 disposed downstream of the series of forming rolls 130.

On the other hand, the inventors of the present invention invented that a member having a closed cross section in which at least one of both end portions of the sheet metal overlaps with the middle portion between the two end portions has a very good structural characteristic. This member is pending as filed Patent Application No. 2000-4523 on 29 January 2000. In order for a member having such a closed cross section to have good structural properties, the side end portion overlapped with the middle portion of the sheet metal must be firmly bonded to the middle portion.

In addition, in a roll forming sheet metal processing apparatus, a three-dimensional product formed from a sheet metal that is rolled and rolled in a very long time cannot be wound, unlike a sheet metal in a raw state, and thus, it is required to cut and laminate it to an appropriate length for storage and transportation. .

However, deformation of the sheet metal may occur in the process of cutting the three-dimensional product, and such deformation may be a serious defect of the product.

The present invention is to provide a roll-forming sheet metal fabrication factory that can perform the molding and joining of the product sequentially in the same work line in the conventional roll-forming sheet metal processing apparatus as described above.

In addition, the present invention is to provide a roll-forming sheet metal mill factory for neatly cutting the molded three-dimensional product without the sheet metal distortion.

1 is a side view schematically showing a conventional roll-forming sheet metal processing plant,

2 is a plan view of the roll-forming sheet metal processing apparatus shown in FIG.

Figure 3 is a side view schematically showing a roll forming sheet metal sheet mill in accordance with an embodiment of the present invention,

4 is a plan view of the roll-forming sheet metal processing apparatus shown in FIG.

FIG. 5 is a cross-sectional view illustrating a product that may be manufactured by the roll forming apparatus shown in FIG. 3.

FIG. 6 is an enlarged plan view illustrating components of a fabrication part of the roll forming apparatus shown in FIG. 4;

7 is a view showing a forming gap of each roll of a series of forming rolls of the roll forming sheet metal processing apparatus used to produce the product shown in FIG.

8 is an exploded view showing the circumferential surface of the stamping roll of the roll forming sheet metal processing apparatus shown in FIG.

In order to achieve the above object, the present invention provides a roll-forming sheet metal processing plant that can easily form a three-dimensional product having a closed cross-section from a flat sheet metal. Sheet metal processing plant according to the present invention is to supply the sheet metal supply unit to release the sheet metal from the sheet metal roll at a suitable speed, the production unit for bending the sheet metal folded or molded into a product of the desired shape, and to cut and ship the finished product to the appropriate length It includes the product shipping unit. The fabrication unit comprises a series of forming rolls for gradually transforming the sheet metal supplied by the feeder from an initial state having a straight cross section to a terminal state having a desired cross sectional shape, and a last roll of the series of forming rolls. And joining means for joining both end portions of the sheet metal to which the molding is completed downstream of the intermediate portion to complete the shape of the product having the closed cross section.

As the joining means, a stamping roll may be used to continuously form the stamp portion at regular intervals along the longitudinal direction.

Preferably, upstream of the series of forming rolls is provided with a guide for guiding the sheet metal supplied from the sheet metal supply portion into the forming gap of the first forming roll, the guide to adjust the sheet metal passage width by the handle It is good to be able to be configured.

It is preferable to install the roofing table conveyor between the sheet metal supply unit and the fabrication unit so that the sheet metal is transported with a slight sag.

The sheet metal supply unit includes an uncoiler for loading a sheet metal roll and releasing the sheet metal from the sheet metal roll at an appropriate speed, a feeding apparatus for supplying the sheet metal released from the uncoiler to a processing line, and a predetermined length of the sheet metal. It is preferable to include a notching unit for forming a crosswise notch each time, and an upstream shearing machine for cutting the sheet metal at a predetermined length of the sheet metal.

It is preferable to install a roofing table conveyor between the uncoiler and the feeder so that the sheet metal is transported with a slight sag.

Preferably, the series of forming rolls and stamping rolls can be configured to be driven by one motor.

Preferably, the stamping roll has a pair of rolls, the surface of the first roll is formed in two rows with protrusions at regular intervals along the circumferential surface, and the surface of the second roll corresponds to the projection of the first roll. A recess is formed.

The cross-sectional shape of the protrusion may have at least one shape selected from the group consisting of a rectangle, a circle, and other polygons.

Preferably, the series of forming rolls consists of a total of 22 cassette-type rolls, each forming roll from the top roll to the last roll to accommodate the step changing shape from sheet metal to the final product. Has

The product delivery unit preferably includes a downstream shearing machine for cutting the finished product by molding to a desired length, and a run-out conveyor for transporting the cut product.

Preferably, the downstream shear comprises a knife reciprocating up and down by a hydraulic cylinder, the knife being configured to dig into the notch formed using the notching unit to cut the product.

According to another aspect of the present invention, there is provided a sheet metal bonding apparatus for joining both end portions of a sheet metal to an intermediate portion in a three-dimensional product molded from a flat sheet metal to complete a shape of a product having a closed cross section. The sheet metal joining apparatus may include a stamping roll that continuously forms the stamped portions at regular intervals along the longitudinal direction.

Preferably, the stamping roll has a pair of rolls, the surface of the first roll is formed in two rows with protrusions at regular intervals along the circumferential surface, and the surface of the second roll corresponds to the projection of the first roll. A recess is formed.

The cross-sectional shape of the protrusion may have at least one shape selected from the group consisting of squares, circles, and other polygons.

According to another aspect of this invention, a method of molding a three-dimensional article from a flat sheet metal is provided. This method includes a sheet metal supplying step of releasing and feeding the sheet metal from the sheet metal roll at an appropriate speed, and a forming step of bending or folding the sheet metal into a desired shape product using a series of forming rolls, and forming both ends of the completed sheet metal. Bonding step to complete the shape of the product having a closed cross-section by bonding to the middle portion, and product shipment step of shipping the finished product is cut to the appropriate length.

The bonding step is preferably configured to form a stamping portion continuously at regular intervals along the longitudinal direction using a stamping roll.

Preferably, the sheet metal supplying step additionally includes a notching step of forming a crosswise notch at a predetermined length of the sheet metal using a notching unit, wherein the product shipping step includes downstream shearing. It further comprises a cutting step of cutting the final product by a desired length using a machine), in the cutting step is preferably configured to start cutting from the notch formed in the notching step.

Hereinafter will be described in detail the configuration of the roll-forming sheet metal processing apparatus according to a preferred embodiment of the present invention while looking at the accompanying drawings.

This embodiment relates to a roll forming sheet metal processing apparatus embodied for forming a three-dimensional product as shown in FIG. 5 from a flat sheet metal.

Roll forming type sheet metal processing apparatus 200 according to this embodiment, as shown in Figures 3 and 4, in addition to the uncoiler 210, the feeder 220 and the series of forming roll 230 and runout conveyor 240, A notching unit 250, an upstream shearing machine 260, a stemping roll 270, and a downstream shearing machine 280 are included.

The uncoiler 210, the feeder 220, and the series of forming rolls 230 and the runout conveyor 240 are the uncoiler 110 and the feeder of the roll forming sheet metal processing apparatus 100 shown in FIGS. 1 and 2. 120 and a series of forming rolls 130 and runout conveyor 140 may be used, and other uncoilers and feeders and a series of forming rolls and runout conveyors may be used.

The notching unit 250 is installed downstream of the feeder 220 to form a notch in the transverse direction for each predetermined length of the sheet metal, and the upstream shear 260 is installed downstream of the feeder 220 to determine the sheet metal. It serves to cut sheet metal in length. Here, the portion including the uncoiler 210, the feeder 220, the notching unit 250, and the upstream shear 260 will be referred to as a sheet metal supply unit. Even though the uncoiler 210 does not smoothly loosen the sheet metal, the sheet metal is somewhat stretched between the uncoiler 210 and the feeder 220 so that the feeder 220 can supply the sheet metal at a constant speed. Leave a room to spare.

Upstream of the series of forming rolls 230, a guide 291 is preferably arranged to guide the sheet metal supplied from the sheet metal supply portion into the forming gap 231A of the first forming roll 230A. Guide 291 is configured to be able to adjust the sheet metal through width by the handle 291A. Between the guide 291 and the supply part, the sheet metal passing through the forming roll 230 continuously continues even though the supply part's notching unit 250 or the upstream shear 260 stops supplying the sheet metal for notching or shearing. Allow some time for the sheet metal to stretch slightly to be supplied.

On the other hand, in the present invention, in the roll forming sheet metal processing apparatus for forming the product, both ends of the sheet metal in the initial state are superimposed on the middle part, and a joining means for joining the two overlapping sheet metals together is provided with a series of forming rolls ( Downstream of the last roll of 230, in this embodiment such joining means is embodied as a stamping roll 270 which continuously forms stamping portions at regular intervals along the longitudinal direction. By the way, sheet metal is generally a highly elastic material with a large elastic limit. Most of the deformation amount formed by the series of stamping rolls 230 from the initial state of the plate type to the desired final state is a permanent deformation amount exceeding the elastic limit, but some of such deformation amount is elastic to be restored to the original state when the forcing is removed. Deformation amount. Therefore, even if the intermediate product exits the last roll of the forming roll 230 in the desired final shape, as the distance from the last roll of the forming roll 230 decreases the forcing to maintain the desired final shape, the deformation restoration phenomenon occurs. This can happen. Accordingly, the stamping roll 270 is preferably disposed as close to the last roll of the forming roll 230 as possible.

Herein, a part including its parts, such as a stamping roll 270 and a guide 291 for joining the overlapping sheet metal with the forming roll 230 for forming the shape of the product, will be referred to as a fabrication part, and in FIG. The configuration of is shown in detail.

In this embodiment, the series of forming rolls 230 is composed of a total of 22 cassette type rolls, and as shown in FIG. 6, the series of forming rolls 230 and the stamping rolls 270 have one motor 231. Driven by). That is, the motor 231 installed near the stamping roll 270 rotates the stamping roll 270 by inputting a rotational driving force to the gearbox 235 connected to the roll shaft of the stamping roll 270, and the gearbox 235. Another output shaft of the input shaft rotates the 22nd forming roll 230V by inputting a rotational driving force to the gearbox 234 connected to the roll shaft of the 22nd forming roll 230V, and the other output shaft of the gearbox 234 is the 15th output shaft. The rotational driving force is input to the gear box 233 connected to the roll shaft of the forming roll 230O to rotate the fifteenth forming roll 2230, and another output shaft of the gear box 233 is the roll shaft of the seventh forming roll 230G. The seventh forming roll 230G is rotated by inputting a rotation driving force to the gear box 232 connected thereto. The first forming roll 230A to the sixth forming roll 230F, the eighth forming roll 230H to the fourteenth forming roll 230N, and the sixteenth forming roll 230P to the twenty first forming roll 230U are rotation driving force. There is a pair of free rotating mandrel which is not input each.

As shown in FIG. 7, the top end roll of the series of forming rolls 230, that is, the first forming roll 230A, has a straight forming gap 401 that can smoothly accommodate the full width of the sheet metal between a pair of free rotating mandrel. And the third forming roll 230C has a forming gap 403 that can be accommodated by bending down the first position near the width end portion of the sheet metal by about one half of the predetermined forming angle, and the fifth forming roll. 230E has a forming gap 405 that can be folded down to receive a first position near the width end of the sheet metal by a predetermined molding angle, and the seventh forming roll 230G is located near the width end of the sheet metal. It has a forming gap 407 that can be accommodated by bending the second position up to about one half of the predetermined forming angle, and the ninth forming roll 230I moves the second position near the width end of the sheet metal by the predetermined forming angle. With a forming gap 409 that can be folded up and received, the eleventh forming roll 230K is intended to form a third position near the width end of the sheet metal. Has a forming gap 411 that can be folded up and received by about one third of the thirteenth forming roll, and the thirteenth forming roll 230M folds up a fourth position near the width end of the sheet metal by about one third of the predetermined forming angle. The forming gap 413, which can be accommodated, and the fifteenth forming roll 2302 can accommodate the forming gap 415 by bending a third position near the width end of the sheet metal to about 2/3 of the predetermined forming angle. The seventeenth forming roll 230Q has a forming gap 417 that can be accommodated by bending a fourth position near the width end portion of the sheet metal to about 2/3 of a predetermined forming angle, and the nineteenth forming roll 230S. ) Has a forming gap 419 that can be accommodated by folding a fourth position near the width end of the sheet metal by a predetermined forming angle, and the twenty-first forming roll 230U indicates the third position near the width end of the sheet metal. It has a molding gap 421 that can be folded and accommodated by a predetermined molding angle. At the moment passing through the forming gap 421 of the twenty-first forming roll 230U, the sheet metal is completely formed into the shape of the desired product, and the last end roll, that is, the twenty-second forming roll 230V is formed of the twenty-first forming roll 230U. By holding the shape of the product firmly with the forming gap of the same shape as the forming gap 421, the shape of the product is prevented from being deformed upon stamping by the subsequent stamping roll 270.

Downstream shears 280 are disposed downstream of the fabrication section to cut the finished product by the desired length by the desired length, and downstream of the downstream shears 280 to transport the final product on a transport plate (not shown). The run-out conveyer 240 which loads is arrange | positioned. The delivery unit 240 may be composed of several rotating mandrels arranged in several places with a plurality of free mandrel and several free mandrels interposed therebetween, or may be constituted by an endless circulation belt driven and circulated by rotating spindles at both ends. . The tip of the product exiting the forming roll 230 is pushed by the subsequent part to be advanced onto the discharger 240, but when cut by the downstream shear 280, the further part is no longer pushed forward and thus is not moved forward. No. In this state, a separate driving force is required to completely put the product on the transmitter 240. A feeding roll 293 provided between the downstream shear 280 and the feeder 240 may provide this driving force.

Here, the portion including the downstream shear 280, the transfer roll 293 and the run-out conveyor 240 will be referred to as the product delivery unit.

Below is a sheet metal supply part and production unit and product shipment of the roll-forming sheet metal processing apparatus 200 according to the present invention for producing a product of the shape shown in Figure 5 as a standard for use as a frame or frame for wall formation of prefabricated buildings The shape and size of the negative components will be described in detail.

First, referring to the specification for using the product 300 having the shape shown in FIG. 5 as a frame or wall forming frame of a prefabricated building, the sheet metal has a thin and high strength of 2.0 mm or less and the surface is galvanized. This is used, and a steel sheet having a thickness of about 1.0mm is mainly used in consideration of workability and economy. A steel sheet having a predetermined width is supplied to the roll forming machine 200 so that the middle portion of the steel sheet forms the web 307 of the finished product and the portions adjacent to both ends thereof form the flanges 305 and 306.

The uncoiler 210 used in this embodiment loads a sheet metal coil wound with a maximum width of 400 mm, a maximum weight of 3 tons, an inner diameter of 470 to 520 mm, and a maximum outer diameter of 1,200 mm, and slowly releases the sheet metal from the outermost turn. It is a mandrel type uncoiler, uses 2.2KW of power, weighs 500Kg, and has a length of about 1,200mm in the line advancing direction.

The feeder 220 is a feeding roll consisting of four rolls having a diameter of 160 mm in two stages. The roll is preferably surface treated by chrome coating after a high-frequency heat treatment, and in order to closely adhere the surface of the roll to the sheet metal surface. An air cylinder is used, the drive roll is driven by a 1.5KW motor whose speed is controlled by a numerical controller, and the sheet metal passage width is controlled by a screw shaft.

The notching unit 250 comprises two punchers, each punching machine having a straight punching edge operated by a hydraulic cylinder, so that the appropriate position in the width direction of the sheet metal, i.e., between the first position and the second position in FIG. And form a notch having a constant length from the portion to the middle portion of the third position and the fourth position.

The upstream shear 260 is configured to cut the sheet metal in the width direction by a cutting blade that is hydraulically raised and lowered.

The feeder 220, the notching unit 250, and the upstream shears 260 are arranged in order from the upstream side to the downstream side on the integrated work bench, and the length of the work bench in the line advancing direction is about 2,000 mm.

Between the uncoiler 210 and the feeder 220, a roofing table conveyor 294 having a length of about 2,000 mm in the line advancing direction is preferably installed. The roofing table conveyor 294 is an uncoiler 210. And the sheet metal hanging between the feeder 220 so as to be transported without being damaged on the surface.

In this embodiment, each of the forming rolls 230A to 230V is a cassette type roll having a diameter of 80 mm and a surface heat-treated and chrome-coated roll disposed in a frame having a width of 1,500 mm and a height of 900 mm. Driven to form a sheet metal having a thickness of 0.1 to 2.0 mm at a maximum forming speed of 15 m / min, and a total of 22 forming rolls from the first forming roll 230A to the 22nd forming roll 230V have a length of 13,675. The stamping roll is disposed on the support frame of mm mm so that the distance between adjacent stands is 600 mm, and is installed downstream of the twenty-second forming roll 230V from the guide 291 provided upstream of the first forming roll 230A. The length to 270 is about 15,670 mm.

Between the upstream shear 260 and the guide 291, a roofing table conveyor 295 having a length of about 2,000 mm in the line advancing direction is preferably provided. The roofing table conveyor 295 is an upstream shear ( The sheet metal hanging between the 260 and the guide 291 is supported so that it can be transported without damaging the surface.

In this embodiment, the stamping roll 270 has a pair of rolls having a diameter of 270 to 280 mm, and a rectangular protrusion 272 is formed on the surface 271 of the first roll as shown in the development view of FIG. 8. Accordingly, two rows are formed at intervals of about 25 mm, and recesses corresponding to the projections of the first roll are formed on the surface of the second roll. The difference in the dimensions of the recess and the projection 272 is determined by the thickness of the sheet metal used as the working material, the shape is not limited to the square as shown in the figure, it can be transformed into a circle or polygon, The spacing can also be changed. The stamping roll 270 is provided with a set of rolls formed with various protrusions and recesses to accommodate such a change, and is configured to be easily replaced as necessary.

The downstream shear 280 is configured to cut the product with a knife reciprocating up and down by a hydraulic cylinder driven by a servomotor having a capacity of about 2.2KW. However, the molded three-dimensional product is not straight in its outline, so it is complicated to provide a support to cooperate with the knife, and thus, it is difficult to provide a support to cooperate with the knife at the time of cutting. In the present invention, in order to solve such a problem, the notching unit 250 is used to form a notch having an appropriate dimension at a suitable position of the width of the sheet metal before molding the sheet metal into a product. In this embodiment, a notch having a length of 40 mm is formed from a position of 60 mm to a position of 100 mm from both width ends of the sheet metal to the middle, whereby the notch is formed on the flanges 305 and 306 in a state where the molding of the product is completed. It is situated in the upper portions 313 and 314 and in portions of the side walls 311 and 312 and in portions of the inclined walls 315 and 316. If the knife is lowered in this state, the knife cuts into the notch and moves downward to cut the product. By cutting in this way, the knife alone can cut the product without distortion without providing a support to cooperate with the knife. Sheet metal according to this embodiment because the sheet metal to form a notch before entering the forming roll 230, the sheet metal has to be molded into the product and passed through the forming roll 230 to lower the knife exactly to the position where the notch is formed, The processing apparatus 200 is provided with a numerical control system for accurately matching the notching timing and the cutting timing, and a detector for accurately detecting the position of the notch. In this embodiment, the downstream shear 280 is installed on a support frame having a length of about 3,800 mm, and the stamping roll 270 and the downstream shear 280 are spaced apart by a distance of about 500 mm.

In this embodiment, the feeder 240 consists only of a plurality of free mandrel arranged at intervals of about 300 mm on a support frame having a length of about 16,000 mm, each mandrel having a length of 400 mm and a diameter of about 48 mm. This is a chrome coated roller. A feed roll 293 is disposed near an upstream end of the feeder 240, and the feed roll 293 advances the product cut by the downstream shear 280 to a downstream side of the mandrel of the feeder 240. Or on another product that has been sent out and loaded on the mandrel. The loaded product is packaged by a separate tool and loaded onto the transport.

Hereinafter, a process of producing a product having the shape shown in FIG. 5 by using the roll forming-type sheet metal processing apparatus 200 according to the present invention will be described in detail.

First, a coil having a sheet thickness of 0.8 mm and a width of 388 mm is wound on the uncoiler 210 and the end of the sheet metal is unwound to be fed to the feeder 220 to prepare the sheet metal processing apparatus 200 to operate. . When the preparation is completed, the driving power is supplied to each machine constituting the sheet metal processing apparatus 200 by turning on the main switch on a control panel (not shown).

When the power is supplied, the uncoiler 210 slowly releases the sheet metal from the coil, and between the uncoiler 210 and the feeder 220, the sheet metal released from the coil sags on the roofing table conveyor 294. have.

As the roller of the feeder 220 rotates, the sheet metal hanging on the roofing table conveyor 294 is attracted and pushed downward. The sheet metal pushed by the feeder 220 passes through the notching unit 250 and the upstream shear 260 and enters the forming roll 230 through the guide 291. The guide 291 serves to adjust the position of the sheet metal so that the sheet metal can easily pass through the forming gap of the first forming roll 230A, and the feeder (260) between the upstream shear 260 and the guide 291. The sheet metal pushed by 220 is limp on roofing table conveyor 295.

The notching unit 250 has a length at two positions from 2/12 to 3/12 of the width and 9/12 to 10/12 of the width from one end of the sheet metal having a width of 388 mm every fixed length from the tip of the sheet metal. Each notch having a width of 1/12 is formed. This notch is located at the distal ends 313, 314 of the flanges 305, 306 in the finished product, ie, in the shape shown in FIG. 5.

The sheet metal engaged with the forming gap 407 of the seventh forming roll 230G through the guide 291 is pulled by the rotation of the roll to form the forming gap 401 to the seventh forming roll of the first forming roll 230A ( After being deformed in stages while passing through the forming gap 407 of 230G, it is continued to be pushed by the seventh forming roll 230G and proceeds to the forming gap of the eighth forming roll 230H to the fifteenth forming roll 230O. Progressively deformed. When the sheet metal reaches the fifteenth forming roll 230O, the traction force and the propulsion force are added by the rotation of the fifteenth forming roll 230O, and the steel sheet continues to advance to the twenty-second forming roll 230V. After passing through the forming gap of the twenty-second forming roll 230V, it is completely deformed into the desired product shape.

The sheet metal having passed through the forming gap of the twenty-second forming roll 230V passes through the stamping roll 270, and the sheet metal overlapping the middle portion of the web 307 of the product 300 shown in FIG. Pressed by the projection 272 of the first roll of 270 and pushed into the recess of the second roll, the stamps 321 and 322 as shown in FIG. 5 are spaced at regular intervals in the longitudinal direction of the product. Generated in two rows. The two overlapping sheet metals are joined to each other by stamps 321 and 322, and this engagement is maintained well even when a force is applied to the flanges 305 and 306 or web 307 of the product.

After the forming and stamping is completed, the dehumidification passes through the lower portion of the knife of the downstream shear 280 and is advanced on the free mandrel of the delivery machine 240. When the notch formed in the notching unit 250 reaches the bottom of the knife, the knife As it descends, it cuts into the notch to cut the side walls 311 and 312 and the inclined walls 315 and 316 of the flanges 305 and 306 and cut the web 307. At this time, the downstream shear 280 only supports the outer plane of the web 307 by the support plate, and the side walls 311 and 312 and the inclined walls 315 and 316 of the flanges 305 and 306 are separate members. It is cut by the knife while maintaining its shape by the rigidity of the sheet metal itself without being supported by it. When notches are formed in the upper portions 313 and 314 of the flanges 305 and 306, the flanges 305 and 306 are pressed when the knife descends and presses the upper portions 313 and 314 of the flanges 305 and 306. The side walls 311 and 312 and the inclined walls 315 and 316 of the flanges 305 and 306 will be collapsed before the tops 313 and 314 of the top are cut. On the other hand, at the moment when the knife descends and cuts the flanges 305 and 306 and the web 307 of the product, it is preferable that the forming roll 230 and the stamping roll 270 stop the operation of the product for a while and the progress of the product is stopped. Do.

The operator may input the length and quantity of the product to be produced on a control panel (not shown), the notching unit 250 forms a notch for each input length, and the downstream shear 280 for each position where the notch is formed. Cutting, the upstream shear 260 cuts the sheet metal at the moment when the sheet metal of length to produce the input quantity. In this embodiment, this operation is controlled by a control unit (not shown), and each unit or roll is provided with a sensor or a measuring instrument to obtain the information necessary for the control. That is, at least one of the feeder 220, the notching unit 250, the upstream shear 260 and the workbench in which they are integrally disposed should have a length measuring device for measuring the length of passage of the sheet metal, and the downstream shear ( 280 must include at least one of a detector for detecting the notch and a length measuring device for measuring the length of passage of the product.

Although this embodiment is described based on molding a three-dimensional product having the shape shown in FIG. 5, the present invention is not limited to molding a three-dimensional product having such a shape, and is not limited to the roll of the forming roll 230. By replacing them, three-dimensional or planar products of various shapes can be formed.

Although the invention has been described above based on the preferred embodiments of the invention, this is for illustrative purposes only and is not intended to be limiting of the invention. It will be apparent to those skilled in the art that modifications, changes, or adjustments may be made from the above-described embodiments without departing from the spirit of the invention. It is intended that the appended claims cover all such alterations, modifications and variations as fall within the scope of protection.

The roll forming sheet metal fabrication apparatus according to the present invention makes it possible to easily form a three-dimensional product having a closed cross-section from a flat sheet metal, and the molding and joining of the product can be performed sequentially in the same work line, and the three-dimensional shape is completed. The product can be cut cleanly without undulating sheet metal.

Claims (18)

A roll forming sheet metal processing apparatus for forming a three-dimensional product from a flat sheet metal, An uncoiler that loads sheet metal rolls and releases the sheet metal from the sheet metal rolls at an appropriate speed, a feeder for supplying the sheet metal released from the uncoiler to the processing line, a notching unit that forms a crosswise notch for each predetermined length of sheet metal Sheet metal supply unit consisting of an upstream shear for cutting the sheet metal at a predetermined length of; A series of forming rolls for gradually transforming the sheet metal supplied by the feeder from an initial state having a straight cross section to a terminal state having a desired cross-sectional shape, and both end portions of the sheet metal completed to be formed downstream of the last roll of the series of forming rolls. Producing unit consisting of a stamping roll to bond the intermediate portion to complete the shape of the product having a closed cross-section; And A roll forming type sheet metal processing apparatus including a downstream shear for cutting the finished product by a desired length by a desired length and a runout conveyor for transporting the cut product. delete The method of claim 1, Upstream of the series of forming rolls is provided with a guide for guiding the sheet metal supplied from the sheet metal supply portion into the forming gap of the first forming roll, The guide is a roll-forming sheet metal processing apparatus, characterized in that configured to adjust the width of the sheet metal through the handle. The method according to claim 1 or 3, Roll forming type sheet metal processing apparatus characterized in that the sheet metal is transported while the sheet metal is slightly stretched by installing a roofing table conveyor between the sheet metal supply unit and the manufacturing unit. delete The method of claim 1, Roll-forming sheet metal processing apparatus, characterized in that the sheet metal is transported while being slightly stretched by installing a roofing table conveyor between the uncoiler and the feeder. The method of claim 1, Roll forming sheet metal processing apparatus, characterized in that the series of forming roll and stamping roll is driven by a single motor. The method of claim 1, The stamping roll has a pair of rolls, On the surface of the first roll, projections are formed in two rows at regular intervals along the circumferential surface, The roll forming-type sheet metal processing apparatus characterized by the recessed part corresponding to the protrusion of a 1st roll formed in the surface of a 2nd roll. The method of claim 8, Roll-forming sheet metal processing apparatus, characterized in that the cross-sectional shape of the protrusion has at least one shape selected from the group consisting of squares, circles and other polygons. The method according to any one of claims 1, 3, 7, 7, 8, and 9, The series of forming rolls comprises a total of 22 cassette type rolls. Roll forming sheet metal processing apparatus, characterized in that each roll from the top end roll to the last end roll has a forming gap that can accommodate the shape changing step by step from the sheet metal to the final product. delete The method according to claim 1 or 3, The downstream shear includes a knife reciprocating up and down by a hydraulic cylinder, The knife is a roll forming sheet metal processing apparatus, characterized in that the cut into the notch formed by using the notching unit to cut the product. delete delete delete As a method of forming a three-dimensional product from a flat sheet metal, A sheet metal supplying step of supplying the sheet metal from the sheet metal roll at an appropriate speed; A notching step of forming a notch in a lateral direction for each of a predetermined length of the sheet metal supplied in the sheet metal supplying step; Forming step of bending or folding the sheet metal to a product of a desired shape using a series of forming rolls; Joining both ends of the formed sheet metal to an intermediate portion to complete a shape of a product having a closed cross section; A cutting step of cutting the sheet metal product completed in the joining step based on the notch formed in the notching step; And And a product shipment step of shipping the sheet metal product completed in the cutting step. delete delete