APPARATUS FOR MANUFACTURING WINDOW/DOOR FRAMES OR BENT METAL PRODUCTS

Abstract

Provided is an apparatus for manufacturing window/door frames or bent metal products, in which a forming roll set that forms window/door frames or bent metal products includes upper and lower surface support rollers, left and right side support rollers and forming rollers, and that makes the upper and lower surface support rollers and the left and right side support rollers transfer a uniform force to a plate-shaped or sheet member, to thus prevent a reaction force to be caused by the forming rollers that form the plate-shaped member and to thereby fundamentally block a wave phenomenon from occurring in the plate-shaped or sheet member that passes through the forming roll set. The forming roll set includes: upper and lower support rollers; cylindrical folding rollers; and cylindrical left and right side surface support rollers. Accordingly, a wave phenomenon is fundamentally blocked from occurring during forming a plate-shaped or sheet member.

Description

TECHNICAL FIELD

The present invention relates to an apparatus for manufacturing window/door frames or bent metal products, and more particularly, to an apparatus for manufacturing window/door frames or bent metal products, in which the window/door frame or bent metal product manufacturing apparatus is configured to include upper and lower surface support rollers, left and right side support rollers and forming rollers as a forming roll set that forms window/door frames or bent metal products, to thus prevent a reaction force that the forming rollers influence upon a plate-shaped member during a process that the upper and lower surface support rollers and the left and right side support rollers support the plate-shaped or sheet member, and to thereby fundamentally block a wave phenomenon from occurring in the plate-shaped or sheet member that passes through the forming roll set.

BACKGROUND ART

In general, insulation windows/doors have an insulation function and a soundproof function, and are mainly used extensively for general houses, commercial houses, apartment houses, apartment building with stores, offices, etc. Aluminum or PVC is used as a material of the insulation windows or doors. The insulation windows or doors include a sash that is fixed on a wall and a window/door frame that is hinge-combined with the sash. Meanwhile, a structural stainless steel plate-shaped or sheet member for producing the insulation windows/doors is standardized by 1 m wide and 3 m or 4 m long, and sold on the market. However, a window frame of a general commercial store in the first floor is 2.6 m-2.7 m high. Therefore, an expensive stainless steel plate of 3 m long is cut into not more than 2.7 m and then abandoned remnants of 30 cm long or more are disposed as scrap metal. In addition, since the stainless steel plate is standardized to l1 wide, a lot of remnants and leftovers occur when it is cut to be manufactured into a window/door frame, to then become a great cause of rising cost and cause a big waste of resources.

In addition, a frame bending process includes: the steps of sequentially pressing a V-cut portion of a sheet member with a blade of a folding machine; making a required angle; sequentially turning and bending the sheet member upside down while replacing the blade of the folding machine depending upon a frame, to thereby complete the frame. Further, a fraction defective and a product quality may be determined according to ability of an artisan. Although the conventional frame bending process has the above-described defects, a traditional processing method of bending a window/door frame has been performed by only a bending method using a conventional folding machine.

Also, the window/door frame that is made using the conventional folding machine is weak in view of soundproof, wind resistance and dustproof, and especially is poor in view of insulation property, to thereby cause energy loss during air-conditioning. Mohair grooves exist in upper and lower H-type bars of a reinforced glass door, respectively, in order to realize soundproof, wind resistance, and dustproof, in which mohair is fitted into the mohair grooves. Here, the H-type bars are stainless steel frames that are fitted in the upper and lower ends of the reinforced glass door to thus protect glass and to make a floor hinge lot attached and fixed to the stainless steel frames. However, there are gaps between the stainless steel frame and the reinforced glass door. Dusts and winds may be easy to come in through the gaps. In order to prevent dusts and winds from coming in through the gaps, paper weather strips or tapes are attached to the stainless steel frame and the reinforced glass door to block the gaps, to accordingly cause poor appearance and no practicality.

Meanwhile, to solve these problems, the present applicant filed a Korean Patent Application No. 2006-85246 entitled a window/door frame manufacturing apparatus including a pinch roll set and a forming roll set that can make a plate-shaped member for the window/door frame move freely, on Sep. 5, 2006, and registered as a Korean Patent No. 0791647, to thus selectively apply a physical pressure to a bent portion of a product and to accordingly enhance an economical efficiency as well as provide a more convenient manufacturing process.

By the way, since the plate-shaped member that is formed using the above-described frame manufacturing apparatus, are made to contact the upper and lower structure of the forming roll set, on a surface to surface basis, a physical force is not uniformly transferred to a portion of the plate-shaped member to be bent during bending. As a result, a wave phenomenon that the plate-shaped member becomes uneven has occurred.

In other words, the conventional forming roll set is designed to make the plate-shaped member contact each other on a surface to surface basis using upper rollers and lower rollers, and to rotate to make the plate-shaped member transformed into an appropriate shape. However, since a forming roll of a portion to be bent is configured into a conical shape, a first half portion and a second half portion of the forming roll set are made to rotate once at an identical time. Accordingly, there is a difference between a distance through which the first half of the forming roll set rotates and a distance through which the second half of the forming roll set rotates. Therefore, since the second half of a big diameter moves farther than the first half during a time that the first half of a small diameter rotates by a shorter distance than the second half, the physical force that is applied to the plate-shaped member is not identical in the first and second halves. As a result, the wave phenomenon occurs during bending the plate-shaped member.

Finally, since a uniform force is not transferred to the plate-shaped member during bending the plate-shaped member using the conventional forming roll set, the wave phenomenon that the plate-shaped member becomes uneven cannot be avoided.

DISCLOSURE OF THE INVENTION

To solve the above problems, it is an object of the present invention to provide an apparatus for manufacturing window/door frames or bent metal products, in which a forming roll set adopts upper and lower surface support rollers and left and right side support rollers at the upper and lower portions and the left and right sides of a plate-shaped or sheet member, to thus stably support the plate-shaped or sheet member and to then form window/door frames or bent metal products, and transfers a uniform physical force to the plate-shaped or sheet member, to thereby fundamentally block a wave phenomenon from occurring in the plate-shaped or sheet member that passes through the forming roll set.

To accomplish the above object of the present invention, according to an aspect of the present invention, there is provided an apparatus for manufacturing window/door frames or bent metal products, the apparatus comprising:

a puncher 10 that partially punches a V-cut plate-shaped or sheet member to make a chamfer on the V-cut plate-shaped or sheet member;

a leveler 20 that presses upper and lower portions of the plate-shaped or sheet member with a roller to heighten flatness of the plate-shaped or sheet member;

a number of groups of pinch roll sets 30 that are configured into active type upper and lower roller shapes that receive power transmitted from outside to thus compulsively transfer the plate-shaped or sheet member, and that are arranged in a straight line at regular intervals to thus enable the plate-shaped or sheet member to be continuously transferred in various forming operation sections; and

a number of groups of forming roll sets 40 that are arranged in the forming operation section that is placed in the middle of the pinch roll sets at regular intervals and applies a constant pressure on the plate-shaped or sheet member that is transferred through the pinch roll sets, to thereby make the plate-shaped or sheet member selectively bent,

wherein each of the forming roll sets 40 comprises;

upper and lower support rollers 40a and 40b that are installed on the upper or lower surface of the plate-shaped or sheet member or the upper and lower surfaces thereof, and whose cylindrical outer circumferential surfaces closely contact the plate-shaped or sheet member, to thus support the upper or lower surface of the plate-shaped or sheet member or the upper and lower surfaces thereof that move through the pinch roll sets;

folding rollers 42a and 42b that are installed on the inner or outer surface of the plate-shaped or sheet member, and whose cylindrical outer circumferential surfaces closely contact the inner or outer surfaces of the plate-shaped or sheet member, to thus apply a uniform pressure to the plate-shaped or sheet member to thereby form a three-dimensional plate-shaped or sheet member whose side surface is bent; and

left and right side surface support rollers 41a and 41b that are installed on the side surface of the plate-shaped or sheet member, and whose cylindrical outer circumferential surfaces closely contact the vertical surface of the plate-shaped or sheet member that has been bent into the three-dimensional plate-shaped or sheet member by the folding rollers 42a and 42b, to thus support the plate-shaped or sheet member to thereby maintain the plate-shaped or sheet member into a vertically bent shape.

In addition, each of the forming roll sets 40 further comprises upper and lower auxiliary support rollers 43a and 43b that are installed at both sides of the upper and lower support rollers 40a and 40b, and that auxiliarily support the upper or lower surface or both of the upper and lower surfaces of the plate-shaped or sheet member.

In addition, the upper and lower support rollers 40a and 40b and the left and right side support rollers 41a and 41b are configured to have a cylindrical structure in which the edges of upper and lower support rollers 40a and 40b and the left and right side support rollers 41a and 41b contact the upper and lower surfaces of the plate-shaped or sheet member or the left and right side surfaces thereof on a surface to surface basis.

In addition, the upper and lower support rollers 40a and 40b and the left and right side support rollers 41a and 41b are configured to have a disc-shaped structure in which the edges of upper and lower support rollers 40a and 40b and the left and right side support rollers 41a and 41b contact the bent portion of the plate-shaped or sheet member on a line to line basis.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects and advantages of the present invention will become more apparent by describing the preferred embodiments thereof in detail with reference to the accompanying drawings in which:

FIG. 1 is a configurational diagram showing an apparatus for manufacturing window/door frames that is applied in the present invention;

FIG. 2 is a configurational diagram showing motors that are applied in the present invention;

FIGS. 3A through 3E are configurational diagrams showing pinch roll sets that are applied in the present invention;

FIG. 4 shows a working state of a first working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the lower direction;

FIG. 5 shows a working state of a second working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the lower direction;

FIG. 6 shows a working state of a third working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the upper direction, around a central portion of the plate-shaped or sheet member;

FIG. 7 shows a working state of a fourth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the upper direction, around a central portion of the plate-shaped or sheet member;

FIG. 8 shows a working state of a fifth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the lower direction, around a central portion of the plate-shaped or sheet member, at a state where the central portion of the plate-shaped or sheet member is maintained at right angles;

FIG. 9 shows a working state of a sixth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the horizontal direction, at a state where the central portion of the plate-shaped or sheet member is maintained at right angles;

FIG. 10 shows a working state of a seventh working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the lower direction;

FIG. 11 shows a working state of an eighth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the lower direction; and

FIG. 12 shows an actual installation of the working embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinbelow, an apparatus for manufacturing window/door frames, according to preferred embodiments of the present invention will be described with reference to the accompanying drawings. Like or similar functional blocks or elements are denoted by like or similar reference numerals through the drawings. The detailed description of the relevant known functions or elements will be omitted in order to avoid the gist of the present invention from being blurred unnecessarily.

FIG. 1 is a configurational diagram showing an apparatus for manufacturing window/door frames that is applied in the present invention, and FIG. 2 is a configurational diagram showing motors that are applied in the present invention. As shown in FIGS. 1 and 2, an apparatus for manufacturing window/door frames that is applied in the present invention, largely includes a puncher 10, a leveler 20, a pinch roll set 30, a forming roll set 40 and an electric motor set 50. The puncher 10 is installed to perform chamfering operations that is required at regular intervals on a V-cut plate-shaped or sheet member, to thereby perform the chamfering operations while unwinding a plate-shaped or sheet member that is wound in a coil form. The leveler 20 consists of upper and lower rollers and presses the V-cut plate-shaped or sheet member from the top and bottom portions of the plate-shaped or sheet member, to thereby heighten flatness of the plate-shaped or sheet member and thus produce products of a better quality.

FIGS. 3A through 3E are configurational diagrams showing pinch roll sets 30 that are applied in the present invention. As shown in FIGS. 3A through 3E, various types of the pinch roll sets 30 may be provided. The pinch roll set 30 is an active roller that compulsively transfers the plate-shaped or sheet member, and includes an upper roller 30a and a lower roller 30b. The upper roller 30a is formed into a cylindrical shape without flection and is connected to an electric motor to thus receive external power and to then rotate, and the lower roller 30b is formed into a variety of curves as forms of forming the plate-shaped or sheet member that coincides with each stage of the operation, to thus transfer the plate-shaped or sheet member smoothly. Flection is formed in the lower roller in correspondence to the shape of the formed plate-shaped or sheet member.

In other words, a reason why the lower roller 30b of the pinch roll set 30 is formed so as to have a variety of types of flection is because a form of the plate-shaped or sheet member is formed at each manufacturing step, and flection should be formed along with this form of the plate-shaped or sheet member, to accordingly enable the lower roller 30b to move smoothly.

These pinch roll sets 30 are installed at regular intervals to thus make a plate-shaped or sheet member to be formed move to other forming operation sections smoothly.

The configuration of the puncher 10, the leveler 20, the pinch roll sets 30, and the electric motor set 50 according to the present invention is the same as that of the conventional art, but the configuration of the forming roll sets 40 that are positioned in the middle of the pinch roll set 30s differs from that of the conventional art, to thus fundamentally prevent a wave phenomenon of the plate-shaped or sheet member and to thereby complete a product of the bent window/door frame.

FIG. 4 shows a working state of a first working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the lower direction. FIG. 5 shows a working state of a second working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the lower direction. FIG. 6 shows a working state of a third working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the upper direction, around a central portion of the plate-shaped or sheet member. FIG. 7 shows a working state of a fourth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the upper direction, around a central portion of the plate-shaped or sheet member.

As shown in FIGS. 4 through 7, the forming roll set 40 according to the present invention includes upper and lower support rollers 40a and 40b, upper and lower auxiliary support rollers 43a and 43b, left and right side support rollers 41a and 41b and folding forming rollers 42a and 42b.

The upper and lower support rollers 40a and 40b are disc-shaped or cylindrical rollers that are coupled with support shafts. The upper and lower support rollers 40a and 40b whose rotating surfaces closely contact the upper and lower surfaces of the plate-shaped or sheet member, play a role of supporting the upper and lower surfaces of the plate-shaped or sheet member. The upper and lower support rollers 40a and 40b do not rotate by a separate power source but rotate by a power source of the pinch roll sets while contacting the plate-shaped or sheet member when the plate-shaped or sheet member compulsively moves by the power source of the pinch roll sets.

The left and right side support rollers 41a and 41b are disc-shaped or cylindrical rollers that are coupled with support shafts. The left and right side support rollers 41a and 41b whose rotating surfaces closely contact the left and right side surfaces of the plate-shaped or sheet member, play a role of supporting the left and right side surfaces of the plate-shaped or sheet member. Like the upper and lower support rollers 40a and 40b, the left and right side support rollers 41a and 41b do not rotate by a separate power source but rotate by the power source of the pinch roll sets while contacting the plate-shaped or sheet member when the plate-shaped or sheet member compulsively moves by the power source of the pinch roll sets.

As described above, the upper and lower support rollers 40a and 40b or the left and right side support rollers 41a and 41b contact the plate-shaped or sheet member simultaneously. As a result, although the folding forming rollers 42a and 42b apply a force to the plate-shaped or sheet member 100, the upper and lower portions and left and right sides of the plate-shaped or sheet member are bent stably.

FIG. 10 shows a working state of a seventh working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the lower direction. Further, as shown in FIG. 10, the upper and lower auxiliary support rollers 43a and 43b are additionally installed at the sides of the upper and lower support rollers 40a and 40b, respectively, as necessary. Accordingly, an operation of forming the upper and lower portions or the left and right side portions of the plate-shaped or sheet member is easily performed at a state where the plate-shaped or sheet member is more stably supported, to thereby block a wave phenomenon of the plate-shaped or sheet member.

FIG. 11 shows a working state of an eighth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the lower direction. In addition, as shown in FIG. 11, at least one of the upper and lower support rollers 40a and 40b is fabricated into a disc-shaped roller, to thus make a sloped edge portion that is positioned at the end of the roller contact the plate-shaped or sheet member on a line to line basis when in use and to thereby press the plate-shaped or sheet member. As a result, at least one of the upper and lower support rollers 40a and 40b that is fabricated into a disc-shaped roller plays a role of assisting to perform the bending operation of the plate-shaped or sheet member more stably, and the other one of the upper and lower support rollers 40a and 40b plays a role of supporting movement of the plate-shaped or sheet member, to thereby make the plate-shaped or sheet member move stably.

On the following, the folding forming rollers 42a and 42b will be described in more detail.

The folding forming rollers 42a and 42b are installed on lateral support shafts that are bent at a certain angle, respectively. Accordingly, the folding forming rollers 42a and 42b rotate at a state where they have been bent at a certain angle, respectively. The plate-shaped or sheet member contacts the rotating surfaces of the folding forming rollers 42a and 42b, to then be bent.

In other words, the plate-shaped or sheet member is three-dimensionally bent by the folding forming rollers 42a and 42b. In this case, the folding forming rollers 42a and 42b are installed in pairs so as to correspond to both sides of the plate-shaped or sheet member, to thus bend both sides of the plate-shaped or sheet member simultaneously. Here, since the plate-shaped or sheet member contacts the folding forming rollers 42a and 42b uniformly on a surface to surface basis, a wave phenomenon is fundamentally prevented from occurring in the plate-shaped or sheet member.

In other words, according to the conventional art, a cone-shaped forming roller contacts the plate-shaped or sheet member on a surface to surface basis, in order to bend the plate-shaped or sheet member. Accordingly, the first and second half portions of the cone-shaped forming roller cause difference between the one-revolution moving distances thereof during rotation of the cone-shaped forming roller, to thereby cause a wave phenomenon to occur when the plate-shaped or sheet member is bent.

However, according to the present invention, the upper and lower support rollers 40a and 40b, the left and right side support rollers 41a and 41b, the upper and lower auxiliary support rollers 43a and 43b, and the folding forming rollers 42a and 42b all of which are configured into cylindrical or disc-shape rollers and whose one-revolution moving distances are same, are adopted, to thereby make the folding forming rollers 42a and 42b bend the plate-shaped or sheet member at a state of stably supporting the plate-shaped or sheet member 100, and to accordingly make it possible to bend the plate-shaped or sheet member without causing a wave phenomenon to occur in the plate-shaped or sheet member. In particular, the moving distances of the folding forming rollers 42a and 42b when they rotate are same in the first and second half portions of the rollers 42a and 42b, to thereby make the plate-shaped or sheet member bent stably and to thus prevent a wave phenomenon from occurring in the plate-shaped or sheet member. As described above, the plate-shaped or sheet member is supported and bent using the upper and lower support rollers 40a and 40b, the left and right side support rollers 41a and 41b, the upper and lower auxiliary support rollers 43a and 43b, to thereby fundamentally prevent the wave phenomenon from occurring in the plate-shaped or sheet member.

For reference, the folding forming rollers 42a and 42b have been described and depicted in pairs in the drawings and embodiments of the present invention, but a folding forming roller may be installed at only one side of the plate-shaped or sheet member, to thereby make it possible to bend only one side of the plate-shaped or sheet member. In other words, when only one folding forming roller is disposed at only one side of the plate-shaped or sheet member to bend one side of the plate-shaped or sheet member, it is possible to bend only one side of the plate-shaped or sheet member without bending both sides of the plate-shaped or sheet member.

FIGS. 4 to 7 show that a plate-shaped or sheet member is bent with the folding forming rollers at a state where the upper and lower support rollers 40a and 40b are provided, respectively. Here, the folding forming rollers that are sloped by 45 or 90 degrees contact the plate-shaped or sheet member on a surface to surface basis to then bend the plate-shaped or sheet member, during a process that the upper and lower support rollers 40a and 40b stably support the plate-shaped or sheet member and make the plate-shaped or sheet member move. In this case, the folding forming rollers 42a and 42b are formed into the cylindrical shape, to thus prevent the wave phenomenon from occurring during bending of the plate-shaped or sheet member. Moreover, the plate-shaped or sheet member is three-dimensionally formed by the folding forming rollers 42a and 42b.

FIG. 8 shows a working state of a fifth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent by 45 degrees in the lower direction, around a central portion of the plate-shaped or sheet member, at a state where the central portion of the plate-shaped or sheet member is maintained at right angles. FIG. 9 shows a working state of a sixth working embodiment of the present invention in which both ends of a plate-shaped or sheet member is bent perpendicularly in the horizontal direction, at a state where the central portion of the plate-shaped or sheet member is maintained at right angles.

FIGS. 8 and 9 show left and right side support rollers 41a and 41b.

In FIG. 8, the perpendicular bending surfaces of a plate-shaped or sheet member are supported by the left and right side support rollers 41a and 41b, at a state where the central portion of the plate-shaped or sheet member has been bent at right angles, and both sides of the upper portion of the plate-shaped or sheet member are bent by 45 degrees at the state where the central portion of the plate-shaped or sheet member has been bent at right angles. For this purpose, the folding forming rollers 42a and 42b that are sloped by 45 degrees are disposed on the upper portion of the plate-shaped or sheet member 100. Accordingly, it is possible to stably support the central portion of the plate-shaped or sheet member with the left and right side support rollers 41a and 41b and bend the upper portion of the plate-shaped or sheet member 100 by 45 degrees.

In FIG. 9, the perpendicular bending surfaces of a plate-shaped or sheet member are supported by the left and right side support rollers 41a and 41b, at a state where the central portion of the plate-shaped or sheet member has been bent at right angles, and both sides of the upper portion of the plate-shaped or sheet member are bent in the horizontal direction at the state where the central portion of the plate-shaped or sheet member has been bent at right angles. Accordingly, it is possible to bend both sides of the plate-shaped or sheet member 100 using the folding forming rollers 42a and 42b at a state where the central portion of the plate-shaped or sheet member has been supported by the left and right side support rollers 41a and 41b. In other words, the left and right side support rollers 41a and 41b support the perpendicular bending surfaces of the plate-shaped or sheet member at a state where the plate-shaped or sheet member has been three-dimensionally formed by the folding forming rollers 42a and 42b. Here, the folding forming rollers 42a and 42b form both sides of the plate-shaped or sheet member again at a state where the left and right side support rollers 41a and 41b have supported the perpendicular bending surfaces of the plate-shaped or sheet member.

FIGS. 10 and 11 show that a plate-shaped or sheet member 100 is bent using the folding forming rollers 42a and 42b at a state where the upper surface roller 40a is provided and upper and lower auxiliary support rollers 43a and 43b are disposed. That is, FIGS. 10 and 11 show that a plate-shaped or sheet member 100 is bent by 45 or 90 degrees in a desired shape at a state where the plate-shaped or sheet member is stably supported by the upper surface roller 40a and the upper and lower auxiliary support rollers 43a and 43b. As shown, since the upper surface roller 40a and the upper and lower auxiliary support rollers 43a and 43b stably support the plate-shaped or sheet member, and further the cylindrical folding forming rollers 42a and 42b bend the plate-shaped or sheet member, the wave phenomenon can be prevented in advance from occurring un the process of bending the plate-shaped or sheet member 100.

FIG. 12 shows an actual installation of an example of the present invention. As shown, a number of supporting bars are provided. In FIG. 12, the supporting bars are configured to pass through the folding forming rollers 42a and 42b and the lower auxiliary support roller 43b, at a state where the supporting bars have been configured to pass through the upper and lower support rollers 40a and 40b. In this way the plate-shaped or sheet member is bent at a certain angle. In other words, the plate-shaped or sheet member 100 is made to move by movement of the pinch roll set, at a state where all of the upper and lower support rollers 40a and 40b, the upper and lower auxiliary support rollers 43a and 43b, the left and right side support rollers 41a and 41b, and the folding forming rollers 42a and 42b are fixed to the supporting bars. Excepting for FIG. 12, the supporting bars are omitted for convenience of explanation of the remaining elements of the other drawings according to the present invention.

The operation of the present invention will be described as follows.

First, as shown in FIGS. 1 through 3, forming roll sets 40 that are denoted as A1 to A4, B1 to B4 and C1 to C4 are disposed according to a model of a window/door frame and are properly distributed between pinch roll sets 30 that are denoted as X1 to X7.

If the forming roll sets 40 are completely distributed, the pinch roll sets 30 are driven by motors 50, to thereby make the plate-shaped or sheet member 100 compulsively move. The plate-shaped or sheet member 100 passes through the leveler 20 and is chamfered at the puncher 10, to then enter the pinch roll sets 30. Of course, the plate-shaped or sheet member is at a state that it has been completely V-cut.

Then, the plate-shaped or sheet member passes through the selected forming roll sets 40 to thus selectively bending the V-cut portion to be bent to be completed into a desired type of a model.

In this case, the forming roll set 40 slowly bends the plate-shaped or sheet member 100 while employing a variation of a proper angle. When the forming roll set 40 bends the plate-shaped or sheet member by 90 degrees, it is desirable that the former slowly bends the latter two times 45 degrees by 45 degrees. FIGS. 4 through 11 show that a certain shape of a plate-shaped or sheet member is fabricated in sequence using the folding forming rollers 42a and 42b, at a state where the upper and lower surfaces or the left and right side surfaces of the plate-shaped or sheet member by the upper and lower support rollers 40a and 40b, the left and right side support rollers 41a and 41b, and the upper and lower auxiliary support rollers 43a and 43b. Thus, it can be seen that the forming roll sets 40 are properly disposed to thereby fabricate a desired shape of the plate-shaped or sheet member in sequence without causing a wave phenomenon. The above-described embodiments of the present invention have been described with respect to the case that the plate-shaped or sheet member is bent by 45 degrees and thereafter is bent again by 45 degrees in order to bend the plate-shaped or sheet member by 90 degrees. However, it is of course possible to bend a plate-shaped or sheet member in sequence by fragmenting a bent angle of the plate-shaped or sheet member in various angles into 30 or 60 degrees.

Finally, the present invention includes the forming roll sets 40 including the upper and lower support rollers 40a and 40b that support the upper and lower surfaces of the plate-shaped or sheet member 100, the left and right side support rollers 41a and 41b that support the left and right sides of the plate-shaped or sheet member, and the upper and lower auxiliary support rollers 43a and 43b that auxiliarily support the upper and lower surfaces of the plate-shaped or sheet member. In addition, the present invention includes the folding forming rollers 42a and 42b that bend the plate-shaped or sheet member by various angles. Accordingly, the plate-shaped or sheet member 100 is uniformly bent and simultaneously the wave phenomenon of the plate-shaped or sheet member is fundamentally blocked.

As described above, the present invention has been described with respect to particularly preferred embodiments. However, the present invention is not limited to the above embodiments, and it is possible for one who has an ordinary skill in the art to make various modifications and variations, without departing off the spirit of the present invention. Thus, the protective scope of the present invention is not defined within the detailed description thereof but is defined by the claims to be described later and the technical spirit of the present invention.

EFFECTS OF THE INVENTION

The present invention includes the forming roll sets including the upper and lower support rollers 40a and 40b that closely contact the upper and lower surfaces of the plate-shaped or sheet member to support the upper and lower surfaces of the plate-shaped or sheet member 100, and the left and right side support rollers 41a and 41b that closely contact the left and right side surfaces of the plate-shaped or sheet member to support the left and right sides of the plate-shaped or sheet member, to thereby prevent a reaction that occurs during forming the plate-shaped or sheet member, and also includes the cylindrical folding forming rollers that closely contact the plate-shaped or sheet member to thus apply a uniform pressure to the plate-shaped or sheet member to bend the plate-shaped or sheet member, and to thereby fundamentally block the wave phenomenon from occurring in forming the plate-shaped or sheet member.

Claims

1. An apparatus for manufacturing window/door frames or bent metal products, the apparatus comprising:

a puncher that partially punches a V-cut plate-shaped or sheet member to make a chamfer on the V-cut plate-shaped or sheet member;

a leveler that presses upper and lower portions of the plate-shaped or sheet member with a roller to heighten flatness of the plate-shaped or sheet member;

a number of groups of pinch roll sets that are configured into active type upper and lower roller shapes that receive power transmitted from outside to thus compulsively transfer the plate-shaped or sheet member, and that are arranged in a straight line at regular intervals to thus enable the plate-shaped or sheet member to be continuously transferred in various forming operation sections; and

a number of groups of forming roll sets that are arranged in the forming operation section that is placed in the middle of the pinch roll sets at regular intervals and applies a constant pressure on the plate-shaped or sheet member that is transferred through the pinch roll sets, to thereby make the plate-shaped or sheet member selectively bent,

wherein each of the forming roll sets comprises:

upper and lower support rollers that are installed on the upper or lower surface of the plate-shaped or sheet member or the upper and lower surfaces thereof, and whose cylindrical outer circumferential surfaces closely contact the plate-shaped or sheet member, to thus support the upper or lower surface of the plate-shaped or sheet member or the upper and lower surfaces thereof that move through the pinch roll sets;

folding rollers that are installed on the inner or outer surface of the plate-shaped or sheet member, and whose cylindrical outer circumferential surfaces closely contact the inner or outer surfaces of the plate-shaped or sheet member, to thus apply a uniform pressure to the plate-shaped or sheet member to thereby form a three-dimensional plate-shaped or sheet member whose side surface is bent; and

left and right side surface support rollers that are installed on the side surface of the plate-shaped or sheet member, and whose cylindrical outer circumferential surfaces closely contact the vertical surface of the plate-shaped or sheet member that has been bent into the three-dimensional plate-shaped or sheet member by the folding rollers, to thus support the plate-shaped or sheet member to thereby maintain the plate-shaped or sheet member into a vertically bent shape.

2. The apparatus for manufacturing window/door frames or bent metal products according to claim 1, wherein each of the forming roll sets further comprises upper and lower auxiliary support rollers that are installed at both sides of the upper and lower support rollers and that auxiliarily support the upper or lower surface or both of the upper and lower surfaces of the plate-shaped or sheet member.

3. The apparatus for manufacturing window/door frames or bent metal products according to claim 1, wherein the upper and lower support rollers and the left and right side support rollers are configured to have a cylindrical structure in which the edges of upper and lower support rollers and the left and right side support rollers contact the upper and lower surfaces of the plate-shaped or sheet member or the left and right side surfaces thereof on a surface to surface basis.

4. The apparatus for manufacturing window/door frames or bent metal products according to claim 1, wherein the upper and lower support rollers and the left and right side support rollers are configured to have a disc-shaped structure in which the edges of upper and lower support rollers and the left and right side support rollers contact the bent portion of the plate-shaped or sheet member on a line to line basis.