Ring mill main roll unit

Abstract

The present invention relates to a ring mill main roll unit comprising: a core die arranged spaced apart from a ring-shaped metal material and rotating around a rotation axis in the same direction as the rotation axis of the ring-shaped metal material, and having a lower locking portion formed along the circumferential direction at the bottom and extending outwardly; at least one replacement die arranged along the circumferential direction in a manner that surrounds the core die, having one side seated and supported by the lower locking portion, configured to be detachably attached to the core die, and pressing the outer surface of the ring-shaped metal material during the ring mill process; a fastening means for detachably connecting the core die and the replacement die; and at least one binding plate that covers and connects the upper part of the core die and the other side of the replacement die to maintain the bonded state between the core die and the replacement die.

Description

Technology Field

[0001] The present invention relates to a ring mill main roll unit, and more specifically, to a ring mill main roll unit with an improved structure that eliminates the need for repeated complete replacement of the main roll in the event of wear and damage to the main roll for a ring mill process, thereby increasing work efficiency and enabling a reduction in working time. Background Technology

[0002] Generally, the ring mill process is a process of processing a large ring-shaped metal material with a square or rectangular cross-section to a predetermined thickness to enlarge the diameter of the ring. Large ring products include not only rings in the general sense but also races, flanges, or rock plates. While ring products may have a square or rectangular cross-section, most are irregular rings with complex irregular outer or inner cross-sections. To produce such irregular ring products, a ring with a square cross-section is first obtained using a general press device, and the outer diameter of the obtained ring is rolled with a main roll to enlarge the diameter of the ring.

[0003] Referring to FIG. 1, a conventional ring mill device includes a mandrel (2) that contacts and supports the inner surface of a heated ring-shaped metal material (W), and a main roll (4) that presses the outer surface of the ring-shaped metal material (W) to form the thickness and outer diameter shape of the ring-shaped metal material (W). Both the mandrel (2) and the main roll (4) rotate, and the ring-shaped metal material (W) also rotates in place. Additionally, the conventional ring mill device further comprises an upper axial roll (5a) and a lower axial roll (5b) that support and smooth the upper and lower surfaces of the rotating ring-shaped metal material (W).

[0004] In such conventional ring mill devices, when the main roll, which adheres to and processes the outer surface of a ring-shaped metal material, wears out, the entire main roll must be replaced repeatedly, and the ring mill device must be disassembled to replace the main roll. Furthermore, conventional ring mill devices have the problem of reducing work efficiency and lowering product productivity during the ring mill process due to the repeated replacement of the main roll.

[0005] Prior art is Published Patent Application No. 10-2009-0007309. The problem to be solved

[0006] The present invention has been devised to solve the aforementioned problems, and the objective of the present invention is to provide a ring mill main roll unit that eliminates the need for repeated complete replacement of the main roll upon wear and eliminates the need for disassembly of the ring mill device for main roll replacement, improves work efficiency during the execution of the ring mill process, enables reduction of working time, and increases product productivity.

[0007] The problems solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0008] A ring mill main roll unit according to the present invention for achieving the above objective comprises: a core mold that is spaced apart from a ring-shaped metal material and rotates around a rotation axis in the same direction as the rotation axis of the ring-shaped metal material, and has a lower locking portion formed along the circumferential direction at the bottom and extending outwardly; at least one replacement mold that is arranged along the circumferential direction in a manner that surrounds the core mold, has one side seated and supported by the lower locking portion, is configured to be detachably attached to the core mold, and presses the outer surface of the ring-shaped metal material during the ring mill process; a fastening means for detachably connecting the core mold and the replacement mold; and at least one binding plate that covers and connects the upper part of the core mold and the other side of the replacement mold to maintain the bonded state between the core mold and the replacement mold.

[0009] Preferably, the above fastening means comprises: at least one dovetail portion formed protruding from the outer surface of the core mold, which is provided on the outer surface of the core mold and spaced apart along the circumferential direction of the core mold; and a locking groove portion provided on the inward surface of the replacement mold facing the core mold, which has an inner shape corresponding to the outer shape of the dovetail portion and enables fastening between the core mold and the replacement mold during the process of inserting the dovetail portion.

[0010] The above dovetail portion can be formed with a width that gradually increases towards the outer side.

[0011] It is preferable that the width of the locking groove portion gradually increases towards the inside.

[0012] It is preferable that the lower locking portion forms an inwardly inclined surface that slopes downward toward the inner side of the core mold so as to stably support the replacement mold.

[0013] The above fastening means may include: a horizontal groove portion formed as a groove structure on the outer surface of the core mold, which is arranged spaced apart along the circumferential direction of the core mold; an insertion fixing portion formed protruding from the inner surface of the replacement mold facing the core mold, which is provided at a position corresponding to the horizontal groove portion and inserted into the horizontal groove portion, and having a rod passage that communicates with a latch rod receiving hole formed in the core mold and formed to intersect the horizontal groove portion; and a latch rod that is inserted into the latch rod receiving hole of the core mold and arranged to pass through the rod passage to maintain the replacement mold attached to the core mold. Effects of the invention

[0014] The ring mill main roll unit according to the present invention, having the configuration described above, is configured such that the replacement mold is arranged along the circumferential direction of the core mold and is detachably coupled to the core mold by means of a fastening means, thereby enabling replacement in case of wear or damage during the ring mill process; the fastening means enables the connection between the core mold and the replacement mold, and a connecting plate covers and connects the upper part of the core mold and the other side of the replacement mold to maintain the connected state between the replacement mold and the core mold, thereby eliminating the need for repeated complete replacement of the main roll when the main roll for the ring mill process wears out, eliminating the need for disassembly of the ring mill device for main roll replacement, and improving work efficiency during the performance of the ring mill process, enabling a reduction in working time, and having the effect of increasing product productivity.

[0015] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0016] FIG. 1 is a drawing for explaining a ring mill device according to the prior art. FIG. 2 is a perspective view of a ring mill main roll unit according to an embodiment of the present invention. FIG. 3 is a drawing illustrating the separated state of an embodiment of the present invention. FIG. 4 is a cross-sectional view of an embodiment of the present invention. FIG. 5 is a perspective view of a ring mill main roll unit according to another embodiment of the present invention. FIG. 6 is a drawing illustrating a separated state of another embodiment of the present invention. FIG. 7 is a drawing for explaining the fastening means employed in another embodiment of the present invention. Specific details for implementing the invention

[0017] In order to clarify the understanding of the present invention in the following description, descriptions of known technologies regarding the features of the present invention will be omitted. The following embodiments are detailed descriptions to aid in understanding the present invention and are not intended to limit the scope of the rights of the present invention. Accordingly, equivalent inventions that perform the same function as the present invention will also fall within the scope of the rights of the present invention.

[0018] Furthermore, in the following description, identical identification symbols denote identical configurations, and unnecessary redundant descriptions and descriptions of known technologies are omitted. Additionally, descriptions of each embodiment of the present invention below that overlap with the description of the technology forming the background of the invention are also omitted.

[0019] Hereinafter, a ring mill main roll unit according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

[0020] FIG. 2 is a perspective view of a ring mill main roll unit according to an embodiment of the present invention, FIG. 3 is a drawing showing the separated state of an embodiment of the present invention, and FIG. 4 is a cross-sectional view of an embodiment of the present invention.

[0021] As illustrated in these drawings, a ring mill main roll unit (10) according to one embodiment of the present invention is configured to press the outer side of a ring-shaped metal material and process the outer side, and comprises a core mold (20), a replacement mold (30), a fastening means, and a binding plate (40).

[0022] As shown in FIG. 2, the core mold (20) is provided with a shaft passage (21a) in the center, allowing a shaft (100) to be placed in the shaft passage (21a), and enabling rotation of the replacement mold (20) while rotating together with the shaft. The core mold (20) is positioned spaced apart from a rotating ring-shaped metal material, rotates around a rotation axis in the same direction as the rotation axis of the ring-shaped metal material, and is provided with a lower locking part (23).

[0023] The core mold (20) is connected to replacement molds (30) arranged along the circumferential direction on the outer surface, enabling ring mill processing of ring-shaped metal materials by the replacement molds. The connection between the core mold (20) and the replacement molds (30) can be achieved by fastening means and a connecting plate (40). The lower locking portion (23) of the core mold (20) is provided along the circumferential direction at the bottom of the core mold facing the floor and extends outward, and supports and supports one side of the replacement mold (30) connected to the core mold by the fastening means and the connecting plate (40).

[0024] As shown in FIG. 3, the above replacement mold (30) may be made up of multiple units and arranged along the circumferential direction in a manner that surrounds the core mold (20), and each is configured to be detachably attached to the core mold (20). One side of the above replacement mold (30) facing the bottom is seated and supported on the lower locking part (23) of the core mold (20), and while attached to the core mold (20), it rotates to press and process the outer surface of the ring-shaped metal material during the ring mill process.

[0025] The above replacement mold (30) is detachably attached to the outside of the core mold (20) by means of a fastening means and a binding plate (40), and can be replaced after being separated from the core mold (20) when it is worn or damaged during the process of processing the ring-shaped metal material during the ring mill process, thereby making it unnecessary to replace the entire ring mill main roll when it is worn or damaged during the ring mill process and preventing an increase in working time.

[0026] The above replacement mold (30) is made up of multiple units and arranged along the circumferential direction of the core mold, and a gap can be formed between each of the replacement molds (30) in the longitudinal direction, thereby enabling the replacement mold to expand when heat is generated due to friction with the ring-shaped metal material, preventing twisting of the replacement mold due to the expansion, and preventing defects in the product.

[0027] The above fastening means is configured to connect the core mold (20) and the replacement mold (30), and includes a dovetail portion (21c) and a locking groove portion (32) to be described later, thereby enabling the core mold (20) and the replacement mold (30) to be connected or separated from each other, thereby allowing easy replacement and connection of the replacement mold (30) depending on the situation.

[0028] The above-mentioned binding plate (40) covers and connects the upper part of the core mold (20) and the other side of the replacement mold (30), thereby maintaining the binding state between the core mold (20) and the replacement mold (30). The above-mentioned binding plate (40) is formed in the shape of a flat ring to cover the upper part of the core mold (20) and the other side of the replacement mold (30), and through holes (42) are formed through which a plurality of screws (51) that are screw-coupled to the core mold and the replacement mold pass. Here, the through holes (42) accommodate the head portion of the screw and are provided with a bolt receiving groove (41) in which the head portion is caught.

[0029] The above replacement mold (30) can be maintained in a state of being connected to the binding plate (40) and the core mold (20) by a screw that passes through each through hole (42) of the binding plate (40) and is inserted into the screw hole (21e) of the core mold and the screw hole (33) of the replacement mold, respectively, and is connected to the core mold and the replacement mold.

[0030] A ring mill main roll unit according to an embodiment of the present invention having such a configuration has the replacement mold (30) arranged along the circumferential direction of the core mold (20) and detachably coupled to the core mold by means of a fastening means so that it can be replaced in case of wear or damage during the ring mill process, the fastening means enables the connection between the core mold (20) and the replacement mold (30), and the fastening plate (40) covers and connects the upper part of the core mold (20) and the other side of the replacement mold (30) to maintain the connection state between the replacement mold and the core mold, thereby making it unnecessary to replace the entire main roll when the main roll for the ring mill process wears out, making it unnecessary to disassemble the ring mill device for replacing the main roll, and improving work efficiency during the performance of the ring mill process while enabling a reduction in working time as well as increasing product productivity.

[0031] Meanwhile, the above fastening means is for detachably connecting the replacement mold (30) and the core mold (20) as previously described, and preferably includes a dovetail portion (21c) and a locking groove portion (32). The dovetail portion (21c) of the fastening means is formed in multiple numbers and is provided on the outer surface of the core mold (20), is spaced apart along the circumferential direction of the core mold (20), and is formed to protrude from the outer surface of the core mold. The dovetail portion (21c) is formed long from the upper side to the lower side of the core mold (20) and is inserted into the locking groove portion (32).

[0032] The locking groove portion (32) of the above-mentioned fastening means is provided on the inner surface (31) of each replacement mold (20) facing the core mold (20), and has an inner shape corresponding to the outer shape of the dovetail portion (21c), and enables the connection between the core mold (20) and the replacement mold (30) during the process of inserting the dovetail portion (21c).

[0033] The dovetail portion (21c) of the above-mentioned fastening means is formed with a width that gradually increases toward the outside, and the locking groove portion (32) is formed with a width that gradually increases toward the inside, thereby preventing the dovetail portion (21c) from detaching from the locking groove portion (32).

[0034] The lower catch portion (23) of the core mold (20) employed in this embodiment preferably has an inwardly inclined surface (23a) as shown in FIG. 4. The inwardly inclined surface (23a) of the lower catch portion (23) has a structure that slopes downward from an outer end facing outward to an inner end facing inward, thereby enabling one side of the replacement mold seated on the lower catch portion to be stably supported. Here, the one side of the replacement mold has a structure that is inclined in the same way as the inwardly inclined surface (23a) so that it can come into contact with the inwardly inclined surface (23a) without any gap.

[0035] The ring mill main roll unit according to one embodiment of the present invention has been described above. Below, a ring mill main roll unit according to another embodiment of the present invention will be described.

[0036] FIG. 5 is a perspective view of a ring mill main roll unit according to another embodiment of the present invention, FIG. 6 is a drawing showing a separated state of another embodiment of the present invention, and FIG. 7 is a drawing for explaining a fastening means employed in another embodiment of the present invention.

[0037] This embodiment is similar in most of its configuration to the previously described embodiment, but differs in the structure of the fastening means and the structure of the replacement mold (30). That is, the fastening means employed in this embodiment is preferably formed to include a horizontal groove (21f), an insertion fixing part (37), and a latch rod (45), as shown in FIGS. 6 and 7.

[0038] The horizontal groove portion (21f) of the above fastening means is provided on the outer surface (21) of the core mold (20), is spaced apart to form a gap along the circumferential direction of the core mold, and is formed as a groove structure on the outer surface so that the insertion fixing portion (37) is inserted therein.

[0039] The insertion fixing portion (37) of the above-mentioned fastening means is formed protrudingly on the inward surface (31) of the replacement mold (30) facing the core mold (20), and is provided at a position corresponding to the horizontal groove portion (21f) and inserted into the horizontal groove portion (21f). The insertion fixing portion (37) is provided with a rod passage (37a) that communicates with the latch rod receiving hole (21g) of the core mold, which is formed in the core mold and is formed to intersect with the horizontal groove portion (21f).

[0040] The latch rod (45) of the above-mentioned fastening means is inserted into the latch rod receiving hole (21g) of the core mold (20) and positioned to pass through the rod passage (37a), thereby maintaining the replacement mold (30) attached (bonded) to the core mold (20). At this time, the binding plate (40) covers and connects the upper part of the core mold (20) and the other side of the replacement mold (30), thereby maintaining the bonded state between the core mold and the replacement mold.

[0041] The above latch rod (45) is inserted into the latch rod receiving hole (21g), and the head portion is placed in a clearance groove (21h) that communicates with the latch rod receiving hole. Additionally, a plurality of through holes (42) are formed in the binding plate (40), allowing a screw to pass through each of the through holes. The through holes communicate with the screw holes (35) of the replacement mold (30) and the screw holes of the core mold. The screw (51) passes through the through holes (42) and is then inserted into each screw hole to be screw-coupled to the core mold and the replacement mold, thereby connecting the upper part of the core mold and the other side of the replacement mold to each other by means of the binding plate (40).

[0042] It is preferable that one side of the replacement mold (30) be seated and supported on the lower locking part (25) of the core mold (20). Additionally, as shown in FIGS. 5 and 6, the replacement mold (30) may be provided with boundary sloped surfaces (31a) on each adjacent outer side. The boundary sloped surfaces (31a) of the replacement mold (30) are formed to be inclined from the other side of the replacement mold toward one side and are arranged at a predetermined interval, thereby enabling the replacement mold to expand when heat is generated due to friction with the ring-shaped metal material, preventing twisting of the replacement mold due to the expansion, and preventing product defects. Furthermore, when processing the outer surface of the ring-shaped metal material, it is possible to prevent scratches or dents caused by contact with the replacement mold on the outer surface.

[0043] Although various embodiments of the present invention have been described above, these embodiments and the drawings attached to this specification merely clearly illustrate a part of the technical concept included in the present invention. It is obvious that variations and specific embodiments that can be easily deduced by a person skilled in the art within the scope of the technical concept included in the specification and drawings of the present invention are all included within the scope of the rights of the present invention. Explanation of the symbols

[0044] 10: Ring mill main roll unit 20: Core mold 21a: Shaft passage 21c: Dovetail section 21e: Screw hole 21f: Horizontal groove 21g: Latch rod receiving hole 21h: Clearance groove 23: Bottom catch 23a: Inwardly sloping surface 25: Bottom catch 30: Replacement mold 31: Inward slope 31a: Boundary slope 32: Locking groove 33: Screw hole 35: Screw hole 37: Insertion fixing part 37a: Road passage 40: Binding plate 41: Bolt receiving groove 42: Through hole 45: Latch rod 51: Screw 100: Shaft

Claims

Claim 1 A core mold spaced apart from a ring-shaped metal material, rotating around a rotation axis in the same direction as the rotation axis of the ring-shaped metal material, and having a lower locking portion formed along the circumferential direction at the bottom and extending outward; at least one replacement mold arranged along the circumferential direction in a manner that surrounds the core mold, having one side seated and supported by the lower locking portion, configured to be detachably connected to the core mold, and pressing the outer surface of the ring-shaped metal material during a ring mill process; and a fastening means for detachably connecting the core mold and the replacement mold. A ring mill main roll unit comprising: at least one binding plate that covers and connects the upper part of the core mold and the other side of the replacement mold to maintain a binding state between the core mold and the replacement mold; wherein the lower locking portion forms an inwardly inclined surface that slopes downward toward the inner side of the core mold so as to stably support the replacement mold, and the inwardly inclined surface of the lower locking portion is provided in a portion facing the binding plate and has a structure that slopes downward toward the inner side from an outer end facing outward, and the replacement mold is arranged to form a gap from each other along the circumferential direction of the core mold and is provided on the outer side of each replacement mold adjacent to each other, and has a boundary inclined surface formed to slope from the other side of the replacement mold toward one side. Claim 2 A ring mill main roll unit according to claim 1, wherein the fastening means comprises: at least one dovetail portion formed protruding from the outer surface of the core mold, spaced apart along the circumferential direction of the core mold; and a locking groove portion provided on the inner surface of the replacement mold facing the core mold, having an inner shape corresponding to the outer shape of the dovetail portion, and enabling fastening between the core mold and the replacement mold during the process of inserting the dovetail portion. Claim 3 A ring mill main roll unit according to claim 2, characterized in that, so as to prevent the dovetail portion from detaching from the locking groove portion, the width of the dovetail portion is formed to gradually increase towards the outside, and the width of the locking groove portion is formed to gradually increase towards the inside. Claim 4 delete Claim 5 A ring mill main roll unit according to claim 1, wherein the fastening means comprises: a horizontal groove portion formed as a groove structure on the outer surface of the core mold, arranged spaced apart along the circumferential direction of the core mold; an insertion fixing portion formed protruding from the inner surface of the replacement mold facing the core mold, arranged at a position corresponding to the horizontal groove portion and inserted into the horizontal groove portion, and having a rod passage communicating with a latch rod receiving hole formed in the core mold and formed to intersect the horizontal groove portion; and a latch rod inserted into the latch rod receiving hole of the core mold and arranged to pass through the rod passage to maintain the replacement mold attached to the core mold.

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