KR20140107076A - Forming Roller for rounding an edge of shape steel, Forming Device including the Roller, and the methed thereof - Google Patents

Abstract

The present invention relates to a forming roller for rounding a flange edge of various types of shape steel, especially plane steel, T-shaped steel, H-shaped steel and the like, which are used for a ship or a structure, a forming apparatus and a method for forming the same. By rounding the flange edge of shape steel or a steel material, the time and process required to forming round edges can be reduced, thus reducing process time and costs to enhance productivity. Painting on a painted edge of the shape steel are prevented from wearing and can be maintained for a long period, thus guaranteeing the high quality of the shape steel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a forming roller including a roller for forming a corner portion, a forming device including the roller,

The present invention relates to a steel pipe having various cross-sectional shapes used for ships and structures, in particular, a roller for round-forming flange edges of steel pipes or steel such as flat steel, T-shaped steel and H- The present invention relates to a method of forming a rounded corrugated steel sheet and a method of forming the rounded corrugated steel sheet by simultaneously rounding flange edges of the steel or steel material to reduce the time and process required for molding the rounded corners, To a molding roller capable of securing a high-quality section steel by keeping the color in a long period without being peeled off, and a molding method thereof.

Shape steel and flat steel such as flat steel, T-beam and H-beam are used as structural materials in various fields, especially in ships. However, since the ship is operated in a water environment such as seawater or fresh water, corrosion of steel or steel used as a structural material thereon can easily occur, which may cause safety problems of a ship. Therefore, the section steel used for the ship is to be used for the ship after painting. However, since the steel strip has a sharp edge, it is difficult to paint sharp edges when painted in this state, and it is easily peeled off after coating and becomes a starting point of corrosion. In order to prevent this problem, there is a process of removing the sharp edges of the corners before painting. In the past, the worker has rounded the edge of the section steel to form four corners in the case of flat steel and 8 corners in the case of H- Since the corners have to be individually ground, it takes a lot of manpower and time, resulting in poor workability and high production costs.

In addition, although a device for automatically machining the sharp edges of the corners is described in Korean Patent Registration No. 10-10478912 entitled " Edge Automatic Finishing Device ", it is difficult to change the cutting bits frequently because the edges are cut with cutting bits And machining process. However, it takes a lot of time, and at the same time, it can not process all the corners of the section steel at the same time. Furthermore, there is a limit to the radius of curvature of machinable corners.

Korean Patent Registration No. 10-10478912

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method of manufacturing a flat- Which can simultaneously perform round molding, thereby remarkably improving workability, a molding apparatus including the roller, and a molding method therefor.

Another object of the present invention is to provide a molding space in which a metal material can flow in the process of forming an edge in forming an edge, so that the edge can be further rounded to prevent peeling of the paint after coating and furthermore, And a molding apparatus including the roller and a method of molding the same.

It is still another object of the present invention to provide a method for forming a corner portion of a molding cavity in which the first curvature portion of the forming groove has a smaller radius of curvature than the second curvature portion so that the material flows naturally, A roller, and a roller, and a molding method thereof.

It is still another object of the present invention to provide a method of manufacturing a steel sheet for forming a corner section of a steel sheet, which can form one or more forming grooves having various widths in the first roller and the second roller, And a molding apparatus including the roller and a molding method thereof.

It is still another object of the present invention to provide a method of manufacturing a steel sheet for forming corner corners, which can form the corners of the steel sheet having the webs of various lengths into a single device by moving the first roller and the second roller right and left, , A molding apparatus including the roller, and a molding method thereof.

It is still another object of the present invention to provide a method of manufacturing a steel plate for forming a steel corner corner which is capable of forming a variety of standard steel bars having flanges of various widths by adjusting the distance between the first roller and the second roller, The present invention also provides a molding apparatus including a roller and a molding method thereof.

In order to achieve the above object, the present invention has an embodiment having the following configuration.

 According to one embodiment of the present invention, the present invention provides a method of manufacturing an image forming apparatus, comprising: a first forming unit and a second forming unit, wherein the first forming unit and the second forming unit include one or more first rollers Wherein the first roller and the second roller are spaced apart from each other by a predetermined distance and the forming groove of the first roller is aligned with the forming groove of the second roller so that the first roller Both side edges of the section steel can be drawn into the forming groove of the second roller and rounded at the same time.

According to another embodiment of the present invention, the forming grooves of the first roller and the second roller are formed by being embedded in the radial direction at a predetermined depth along the circumference of the roller and have a first radius of curvature at both inner corner portions And a second curvature portion continuing between the first curvature portion and the second curvature portion defining a molding space through which the corner material of the section formed by the first curvature portion can flow, .

According to another embodiment of the present invention, the present invention is characterized in that the radius of curvature of the first curvature portion is smaller than the radius of curvature of the second curvature portion, so that the material to be molded is naturally introduced into the molding space.

According to another embodiment of the present invention, the present invention is characterized in that the number of forming grooves of the first roller and the second roller is two or more, the widths of the respective forming grooves are different from each other, The forming grooves of the groove and the second roller are characterized in that the forming grooves having the same width are aligned in a line with each other.

According to another embodiment of the present invention, the first roller of the first forming part and the second roller of the second forming part are movable in the axial direction, respectively.

According to another embodiment of the present invention, the first forming part is movable in a direction perpendicular to the axial direction.

According to another embodiment of the present invention, the present invention is characterized in that the first shaping portion includes a first rotation axis passing through the center of at least one of the first rollers, and the second shaping portion includes a center of one or more of the second rollers And the second shaping portion is driven by the second roller receiving the power from the electric motor while the second roller is integrally rotated with the second rotation shaft, and the second rotation shaft is driven by receiving power from the electric motor.

According to still another embodiment of the present invention, the present invention includes a moving means for moving the first shaping portion in a direction perpendicular to the axial direction, and the moving means includes a first shaping portion and a second shaping portion, And a conveying screw, wherein the conveying screw is self-locking.

According to another embodiment of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: a first curvature portion formed by being inserted into a predetermined depth in a radial direction along a circumference of a circumference and having a first radius of curvature at both inner corner portions; And the second curvature portion defines a molding space through which the edge material of the section steel formed by the first curvature portion can flow.

According to another embodiment of the present invention, the present invention is characterized in that the radius of curvature of the first curvature portion is smaller than the radius of curvature of the second curvature portion, so that the material to be molded is naturally introduced into the molding space.

According to another embodiment of the present invention, a first roller of a first forming part and a second roller of a second forming part are spaced apart from each other by a predetermined distance so that the forming groove of the first roller and the forming groove of the second roller are aligned A step of inserting a steel sheet into a space between the first roller and the second roller and inserting the flange edge of the steel sheet into the forming groove of the second roller facing the forming groove of the first roller, A roller pressing step of pressing the first roller of the first forming part in the flange direction of the section steel so that the flange edge of the section steel can be pressed into the forming groove of the second roller facing the forming groove of the first roller, The flange edge of the forming groove of the first roller and the forming groove of the second roller is rounded by the first curvature portion of the forming groove and the flowing material flows into the second curvature portion to have a larger radius of curvature To be able to mold corners And a forming step of forming a molding surface.

According to another embodiment of the present invention, the present invention is characterized in that the roller aligning step further comprises a distance adjusting step of adjusting a distance between the at least one first roller and the at least one second roller.

According to another embodiment of the present invention, the roller aligning step includes a roller selecting step of selecting a first roller and a second roller having a forming groove having a width corresponding to the flange thickness of a section steel to be formed Further comprising:

The present invention has the following effects with the above configuration.

The present invention has the effect of remarkably improving the workability by aligning the forming grooves of the second roller opposed to the forming grooves of the first roller in a row, and at the same time rounding all the corners of the flange of the section steel simultaneously.

The present invention provides a molding space in which a metal material can flow during corner molding in the process of forming corners, so that it is possible to further round the corners, thereby preventing the peeling of the paint after coating and further improving the corrosion resistance The effect can be achieved.

The first curvature of the forming groove is formed to have a curvature radius smaller than that of the second curvilinear portion so that the material can flow naturally so that the formability is increased so that the additional process is not required and the productivity is improved .

It is possible to form one or more forming grooves having various widths in the first roller and the second roller so that the various types of steel having various flanges of various thicknesses can be formed into one apparatus.

The present invention has the effect that the first roller and the second roller can be moved to the left and right to adjust the gap between the rollers so that the edges of the H-shaped steel having webs of various lengths can be formed into a single device.

The present invention is capable of adjusting the distance between the first roller and the second roller, so that it is possible to mold a steel sheet of various sizes having flanges of various widths into one apparatus.

1 is a perspective view of a molding apparatus according to an embodiment of the present invention;
Fig. 2 is an exploded perspective view of the molding apparatus shown in Fig. 1; Fig.
Fig. 3 is a state of use showing a working relationship between the first forming portion and the second forming portion in Fig. 1; Fig.
Fig. 4 is a view showing the roller forming groove in Fig. 3, and is an enlarged view of a portion A in Fig. 3;
Fig. 5 is a state of use showing the alignment state of the first forming unit and the second forming unit in Fig. 1; Fig.
FIG. 6 is a state of use showing the left and right movement and the upward and downward movement states of the first roller and the second roller in the molding apparatus of FIG. 1;
7 is a perspective view showing a process of inserting an H-shaped steel into the molding apparatus shown in Fig.
8 is a use state diagram of Fig.
9 is a detailed view showing a process in which a corner of a steel section is formed in a molding groove by a molding apparatus according to an embodiment of the present invention;
FIG. 10 is a detailed view showing a process of forming a roller with a molding groove having no second curvature portion; FIG.
Figs. 11 and 12 are use-state diagrams showing the process of adjusting the distance between the first roller and the second roller to form two H-shaped beams having flanges of the same thickness but different web lengths. Fig.
13 is a use state diagram showing a process of aligning the forming grooves of a corresponding width to form an H-shaped steel having flanges different in thickness from the H-shaped steel of FIGS. 11 to 12. FIG.
14 is a perspective view of a molding apparatus according to another embodiment of the present invention;
Figs. 15 to 16 are use state diagrams showing a process of forming a T-shaped steel and a flat steel by using the molding apparatus shown in Fig. 14. Fig.
17 is a flowchart showing a forming method of a section steel according to another embodiment of the present invention.

The Applicant will now describe the present embodiment in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a molding apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the molding apparatus shown in FIG. 1. FIG.

1 and 2, the molding apparatus 1 of the present invention includes a first molding section 4 and a second molding section 6. As shown in Fig. According to another embodiment of the present invention, the molding apparatus 1 includes a support body 2 for supporting the first molding section 4 and the second molding section 6, And a base (3) for supporting the support body (2). According to another embodiment of the present invention, a driving means 7 for driving the second forming portion 6 may further be included.

2, the first forming unit 4 includes a first roller 42 and a first rotating shaft 40. [ The first roller 42 is formed of one or more rollers, and each of the rollers has a cylindrical shape as a whole, and a forming groove formed at a predetermined depth along the circumference of the roller is formed. As shown in FIGS. 3, 5, 11, 12 and 13, the molding grooves are spaced apart from each other by a predetermined distance in the axial direction to form a first molding groove 421, a second molding groove 422, (423), and the like. The widths of the first through third molding grooves may be different from each other or may be different from each other depending on the standard of the section steel required for molding. Since the length L of the web, the height H of the flange, and the thickness T of the flange are different in the case of the section steel to be formed, for example, H-shaped steel, the width w1 of the various forming grooves, W2, and the number of forming grooves. Herein, the axial direction means the direction of the center line on which the rotation shaft rotates, and the radial direction means the direction extending from the outer peripheral surface of the roller to the center direction.

4, the forming groove is formed in a "u " shape with a predetermined depth in the radial direction, and has a first curvature portion 420a having a first radius of curvature R1 at both inner corner portions, And a second curvature portion 420b having a second curvature radius R2 formed between the first curvature portions 420a.

The first curvature portion 420a has a first radius of curvature and is formed at an edge of the inner side surface of the groove. The flange edge f1 of the steel pipe to be inserted into the forming groove is pressed to form the first round. Since the first curvature portion is provided on both sides of the inner side, the two edges f1 of the flange f are simultaneously rounded.

The second curvature portion 420b is a portion formed between the two first curvature portions 420a and has a second radius of curvature. As shown in FIG. 9, The flow of the metal material in the molding process occurs like the arrow M and provides the molding space G in which the flowing metal material can flow naturally when rounded by the one curvature portion. The second curvature radius R2 of the second curvature portion is preferably larger than the first curvature radius R1 so that the curvature of the first curvature portion is made gentler so that the metal material naturally flows into the molding space G, I will. Here, the high degree of molding completeness means that the edges of the flange after molding as shown in Fig. 9 mean that the curvature is gently connected as a whole, and that additional machining after molding is not necessary or can be minimized. When the radius of curvature of the second curvature portion is smaller than that of the first curvature portion, the molding space G formed by the second curvature portion becomes large, and the metal material flowing and shaped by the first curvature portion Or the curvature of the first curvature is terminated and the curvature suddenly becomes sudden at the portion leading to the second curvature portion so that a natural curved surface can not be formed at the corner of the formed steel after the forming, so that an additional machine such as another grinding at the corner A processing step is required and the productivity is lowered.

10 shows a molding process in the case where only the first curvature portion is formed without the second curvature portion. In this case, although the corner is roundly formed by the first curvature portion 420a, There is no forming space. Therefore, a flow-free material flows out of the forming groove to form a burr f2 in the vicinity of the edge, and an additional process for grinding or cutting burrs later is required It will reduce productivity. This results in a large-scale effect compared with the conventional molding method.

At least one of the first rollers 42 is inserted into the first rotary shaft 40. The number of corners of the flange to be formed at the same time is appropriately selected depending on whether the section steel is an H-section steel, a flat steel section or a T- .

The first rotation shaft 40 may be rotated integrally with the first roller as the axis into which the first roller 42 is inserted or the first rotation axis may be fixed and only the first roller may be rotated with respect to the first rotation axis And a reduced diameter portion 401 to be inserted into the conveying body 53 of the moving means 5 at both ends, and the shaft diameter portion is inserted into the conveying body. When the first rotation shaft rotates, it is coupled to the conveying body 53 so as to be rotatable, and is fixed so as not to be rotatable when rotation is not required. Importantly, the first roller 42 inserted in the first rotation shaft must rotate. When the first roller and the first rotation shaft are integrated, a key groove is formed on the inner peripheral surface of the shaft hole of the first rotation shaft and the first roller and the key is inserted into the key groove, On the other hand, when the first rotation shaft does not rotate, only the first roller needs to be rotated, so that a structure such as a key or a key groove is not required.

The second forming part 6 includes a second roller 62 and a second rotating shaft 60 like the first forming part 6. The second roller 62 has a forming groove like the first roller, and the forming groove includes at least one first forming groove 621, a second forming groove 622, a third forming Grooves 623 and the like, and each of the molding grooves includes a first curvature portion 620a and a second curvature portion 620b like the previously-formed molding groove of the first roller, and their curvature radius degrees 1 roller, and a description thereof will be omitted. The second roller 62 includes a key groove 625a on the inner circumferential surface of the shaft hole 625 into which the second rotation shaft is inserted. The power of the second rotation shaft is transmitted to the second roller .

The second rotary shaft 60 includes a reduced-diameter portion 601 at both ends thereof in the same manner as the first rotary shaft, and is inserted and fixed to the conveying member 53. However, the difference from the first rotation axis is that the second rotation axis must be rotated unlike the first rotation axis, which may or may not rotate. One end of the second rotary shaft 60 is connected to the driving means 7 and receives power from the driving means 7 to rotate. The driving means includes both an electric motor driven by electricity and a hydraulic means acting on the hydraulic pressure. The second rotation shaft 60 has a key groove 602 in the axial direction and the key groove 602 is aligned with the key groove 625a of the second roller 62 and a key K is inserted therebetween And when the second rotating shaft is rotated by the driving means 7, the second roller is also rotated to feed the section steel.

The support body 2 is a plate-shaped member for supporting the first rotation shaft 40 of the first forming part and the both side ends of the second rotation shaft 60 of the second forming part movably in the direction perpendicular to the axial direction, And includes a guide hole 21 formed in a longitudinal direction allowing movement of the rotary shafts at predetermined positions and a guide protrusion 22 protruding from the inner side surface of the guide hole. The guide hole 21 is a hole slotted in a longitudinal direction on a certain portion of the support body, and a conveying body to be described later is inserted and guided. The guide protrusions 22 are protrusions formed on both sides or one side of the inner side surface of the guide hole, and are guided in a state in which the guide member is inserted. It goes without saying that the guide groove may be used instead of the guide projection.

The conveying means 50 includes a conveying member 53 fixed to the rotary shaft, a conveying screw 52 for moving the conveying member, and a handle 51 coupled to the conveying screw to transmit a rotating force .

The conveying member 53 includes a first conveying member 531 and a second conveying member 532 as members having a constant shape, for example, a hexahedron shape complementary to the guide holes 21. [

The first conveying member 531 is a conveying member coupled to the first rotating shaft. The conveying member includes a screw coupling hole 531a to which one end of the conveying screw 52 is rotatably coupled, (Not shown). The screw coupling hole 531 includes a bearing (not shown) on its inner circumferential surface, and one side of the conveying screw can be coupled thereto. When the conveying screw is rotated, as the conveying screw ascends and descends, And can move synchronously along the projections 22 together. In addition, the rotation shaft coupling hole 531b is inserted and fixed such that the insertion shaft 401 of the first rotation shaft is positioned to bear a bearing (not shown). If the first rotation shaft is to be rotated, the bearing may be rotatably mounted. Otherwise, if only the first roller can be rotated, the insertion shaft 401 may be press-fitted and fixed without showing the bearing .

The second conveying member 532 may have the same configuration as the first conveying member, but the difference is that unlike the first conveying member 531 in which the first rotating shaft is rotatably or not coupled, So as to be rotatable. This is because the second rotary shaft 532 is to be synchronized with the axis of the driving means because it is transmitted by the driving means 7.

The conveying screw 52 is threaded on the outer circumferential surface and is coupled to the first conveying member through the screw hole 23 of the support body 2. [ When the conveying screw 52 is rotated, the conveying screw is screwed into the screw hole of the screw hole 23 of the support body 2, And when it reaches a predetermined position, it is stopped by the self-locking function.

The handle 51 is coupled to one end of the opposite side of the conveying screw so that the conveying screw can be easily rotated.

According to another embodiment of the invention, the molding apparatus 1 further comprises a base 3, which can comprise a base plate 31 and a leg 33 supporting it .

Applicants will now review the working relationship or other embodiments of the present invention with reference to Figures 3 to 17 below.

6, the first roller 42 is mounted on the first rotary shaft 40 and the second roller 62 is mounted on the second rotary shaft 60 so as to be movable in the direction of the arrow C in the axial direction. Both ends of the first rotation shaft are coupled to the first conveying member 531 and both ends of the second rotation shaft are coupled to the second conveying member 532. The conveying screw 52 is rotatably coupled to the screw engaging hole 531a of the first conveying member 531. Accordingly, when the handle 51 is turned, the feed screw claw 52 is moved in the direction perpendicular to the axial direction, and the first rotary shaft coupled to the handle 51 ascends and descends in the direction of arrow D together. Further, since the second roller 62 is coupled to the second rotation shaft 60 through the key K, when the second rotation axis is rotated by the driving means 7, the second roller also rotates together. As such, the second rotation axis is rotated by the driving means, while the first rotation axis is rotated by the rotation of the second rotation axis, and the second roller is also rotated by the force when the section steel starts to be inserted. If the first roller 42 is coupled to the first rotation shaft 42 through the key K, the first rotation shaft also needs to rotate together. Therefore, the insertion shaft 401 of the first rotation shaft is rotated together with the rotation axis combination And the bearing is inserted into the hole 531b so as to be rotatable relative to the first rotation shaft.

Further, the forming method of the present invention includes an aligning step s1, a step of inserting a section steel (s2), a roller pressing step (s3) and a forming step (s4) as shown in Fig.

The aligning step s1 includes a roller selecting step s11 and a distance adjusting step s12.

The roller selecting step (s11) is a step of selecting rollers that meet the flange thickness T, the length L of the web, and the height H of the flange in consideration of the type and size of the section steel to be formed. It is very important to have a variety of rollers to form sections of various sizes with one molding machine. For example, the width W of the forming groove, the number of the forming grooves in one roller, that is, the number of the forming grooves, the number of forming grooves, and the diameter of the rollers It is necessary to provide a roller as a unit.

The distance adjustment step s12 is a step of adjusting the distance between the rollers of the first roller and the rollers of the second roller, and adjusting the distance between the first roller and the second roller.

As shown in FIGS. 3 and 5, when the first forming unit 4 and the second forming unit 6 are aligned, a gap between the first and second rollers is formed to be equal to a predetermined distance n do. The distance n is determined according to the dimension of the section steel to be formed, specifically the flange height H of the section steel.

As described above, at least one of the first roller 42 and the second roller 62 is provided. In the case of forming the flange edge of the flat or T-shaped steel, at least one In case of H-shaped steel, it should be composed of at least two rollers. Further, when the first roller 42 and the second roller 62 are aligned, the forming grooves of the second roller opposed to the forming grooves of the first roller must be aligned with each other along the aligning line B in FIG. 5 . This is because the edge of one side of the flange of the section steel is inserted into the forming groove of the first roller and the other opposite edge is inserted into the forming groove of the second roller so that all edges of the flange of the section steel inserted into the forming groove are formed at the same time It is a very important factor.

In addition, the distance between the rollers of the first roller and the rollers of the second roller is determined by the dimension of the section steel to be molded, specifically the length L of the web of section steel. Referring to FIGS. 11 and 12, when the H-shaped steel having the length L1 of the web and the H-shaped steel having the length L2 are formed, the distances between the rollers are adjusted to D1 and D2. 13 shows a process of selecting a forming groove according to the flange thickness T2 of the section steel. 11 and 12, the sections are aligned on the basis of the third forming grooves 423 and 623 in order to form a section having a thickness T1. However, in the case of FIG. 13, .

7 and 8, when the roller aligning step is completed, the step of inserting the section steel (s2) is performed by inserting a flange edge of a predetermined section steel into the forming grooves of the first and second rollers to be.

The roller pressing step s3 is a step of pressing the first roller downward by rotating the conveying screw 52 when the forming of the section steel is completed, So that an unnecessary space is not formed between the flange and the molding groove, thereby increasing the molding efficiency. As described above, since the conveying screw 52 has a self-locking function, the locked state can not be released even when it is pressurized, so that the pressurized state of the section steel is maintained.

When the aligning step, the pressing step, and the like are completed as described above, the shaping step is performed by operating the driving means 7 to rotate the second rotation shaft 60 and rotate the second roller 62, The edge f1 of the flange (f) of the section steel located in the forming groove of the first roller and the forming groove of the second roller, as shown in Fig. 9, moves along the forming groove of the second roller, 620a, and the material flowing in the molding process flows into the molding space G formed by the second curved portions 420b, 620b in the direction of arrow M so that the corners are rounded as a whole. The important point here is that the second curvature portion absorbs the natural flow of the material so that the corners of the section can be formed more rounded than before. For example, in the past, the corner has a maximum of about 1.5R, but according to the present invention, it is possible to form a shape of 3R or more. As such, the reason for the more rounded molding is to increase the safety and durability of the ship or structure by preventing the ease of painting and the corrosion starting from the edge of the steel frame after painting. It is preferable that the curvature radius R2 of the second curvature portion is larger than the curvature radius R1 of the first curvature portion so that the curvature radius R2 of the second curvature portion R2 is more smoothly realized, It is possible to increase the moldability by reducing the resistance against the flow, and furthermore, the radius of curvature of the second curvature portion becomes small, the molding space becomes large and is rounded by the first curvature portion, So that the machining process does not occur. 10, when there is no forming space, the material flows out of the forming groove (f2) during the forming process, and an additional machining process such as cutting or grinding is required to remove it, do.

14 to 16 show another embodiment of the present invention. FIG. 14 shows a case where only one of the first roller and the second roller is used, so that a T-shaped steel (see FIG. 15) And shows a molding apparatus for molding an edge.

While the applicant has described various embodiments for implementing the technical idea of the present invention, the scope of the present invention should not be limited to the embodiment, but various modifications and embodiments are possible.

1: Molding device
2: support body 21: guide hole 22: guide projection
3: base 31: top plate 33: leg
4: first forming part 40: first rotating shaft 401:
42: first roller, 421: first molding groove, 420a: first curvature portion, 420b: second curvature portion,
R1: first radius of curvature, R2: second radius of curvature, G: molding space,
422: second molding groove, 423: third molding groove
6: second forming part 60: second rotating shaft 601: insertion shaft
62: second roller, 621: first molding groove, 620a: first curvature portion, 620b: second curvature portion,
622: second molding groove, 623: third molding groove
5: Up and down lever, 51: Handle, 52: Feed screw, 53: Feed body
s: section steel, f: flange, f1: edge

Claims (13)

1. A molding apparatus for forming rounded corners of a section steel,
The first forming part and the second forming part each having at least one first roller and at least one second roller each having a forming groove along a circumference thereof,
The forming groove is formed in the outer peripheral surface of the first roller and the second roller at a certain depth in the radial direction to have a "u" shape,
Wherein the first roller and the second roller are spaced apart from each other by a predetermined distance and the forming groove of the first roller is aligned with the forming groove of the second roller so that the forming groove of the first roller and the second roller And both side edges of the section steel can be drawn into the forming groove of the forming die at the same time and can be rounded at the same time. 2. The image forming apparatus according to claim 1, wherein the forming grooves of the first roller and the second roller have a first curvature portion having a first radius of curvature at both inner corner portions and a second curvature portion extending between the first curvature portions, And the second curvature portion defines a molding space through which the edge material of the section steel formed by the first curvature portion can flow. The apparatus as claimed in claim 2, wherein the curvature radius of the first curvature portion is smaller than the curvature radius of the second curvature portion, so that the material to be molded flows into the forming space naturally. 4. The process cartridge according to any one of claims 1 to 3, wherein the number of forming grooves of the first roller and the second roller is two or more, the widths of the respective forming grooves are different from each other, Wherein the forming groove of the groove and the forming groove of the second roller are aligned in a line with each other. 4. The forming apparatus according to any one of claims 1 to 3, wherein the first roller of the first forming unit and the second roller of the second forming unit are movable in the axial direction, respectively The apparatus as claimed in claim 5, wherein the first shaping portion is movable in a direction perpendicular to the axial direction 7. The apparatus of claim 6 wherein the first shaping portion includes a first rotational axis passing through the center of at least one of the first rollers and the second shaping portion includes a second rotational axis passing through the center of at least one of the second rollers And the second shaping portion is driven by the second roller being rotated together with the second rotation shaft, and the second rotation axis is driven by receiving power from the driving means. 8. The image forming apparatus according to claim 7, further comprising moving means for moving the first forming portion in a direction perpendicular to the axial direction, wherein the moving means includes a conveying screw fastened to both ends of a first rotation shaft of the first forming portion, Wherein the screw is capable of self-locking. A first curvature portion formed in a "u " shape with a predetermined depth in the radial direction along the circumference of the circumference and having a first radius of curvature at both inner corner portions, and a second curvature portion extending between the first curvature portions And the second curvature portion defines a molding space through which the edge material of the section steel formed by the first curvature portion can flow. The forming roller according to claim 9, wherein a radius of curvature of the first curvature portion is smaller than a radius of curvature of the second curvature portion, so that the material to be molded flows into the forming space naturally. A method of manufacturing a molding machine, comprising: forming a first roller of a first forming part and a second roller of a second forming part of a forming device according to any one of claims 1 to 8 at a predetermined distance, A roller aligning step for aligning the roller,
A step of inserting a section steel into a space between the first roller and the second roller and inserting the flange edge of the section steel into a forming groove of the second roller facing the forming groove of the first roller;
A roller pressing step of pressing the first roller of the first forming part in the flange direction of the section steel so that the flange edge of the section steel can be pressed into the forming groove of the second roller facing the forming groove of the first roller,
The flange edge of the forming groove of the first roller and the forming groove of the second roller is formed to be rounded by the first curvature portion of the forming groove and the flowing material flows to the second curvature portion, And a forming step of forming a corner having a radius. 12. The method according to claim 11, wherein the roller aligning step further comprises a distance adjusting step of adjusting a distance between the at least one first roller and the at least one second roller. 13. The method according to claim 12, wherein the roller aligning step further comprises a roller selecting step of selecting a first roller and a second roller having a forming groove having a width corresponding to a flange thickness of a section steel to be formed Molding method of corner corners.

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