KR101931640B1 - Milling apparatus and method for circular structure - Google Patents

Abstract

The present invention relates to a milling apparatus for repairing a cylindrical structure and a milling method using the milling apparatus. More particularly, the present invention relates to a milling apparatus for repairing a cylindrical structure by installing a rail capable of raising and lowering along the outside of a structure at a site where a large cylindrical structure is installed, If a milling device is installed outside the structure to repair the cracks in the structure or to mill the part for welding, the milling work through the milling device can be performed even if the worker does not climb or hang on the outside of the high structure. And more particularly, to a milling apparatus for repairing a cylindrical structure capable of performing a milling operation very quickly and safely, and a milling method using the same.
A milling apparatus for repairing a cylindrical structure according to the present invention is a milling apparatus installed outside a cylindrical structure having a predetermined radius to perform a milling operation. The milling apparatus includes a rail portion arranged to surround the periphery of the structure at a predetermined height, ; A bed frame provided vertically movably along the outer periphery of the structure and provided with rollers which are seated on the rail, a main shaft and a guide rail on which cutting tools are arranged in a direction orthogonal to the outer surface of the structure, A milling machine including an LM guide unit for guiding the upward and downward movement of the main shaft; A winch means constituted by a winch seated and fixed to the upper portion of the structure and operated to raise or lower the rail or the milling machine through a wire wound on the winch; .
A method of milling a cylindrical structure according to the present invention is a milling method for a cylindrical structure using a milling device, the method comprising: a winch installation step in which the winch means is fixed to an upper surface of the structure; A rail mounting step of coupling the rail portion to surround the structure; A milling machine installation step of installing the milling machine on the rail by lifting the milling machine through the winch unit; A rail and a work machine lifting step for lifting the rail part and the milling machine while the milling machine is installed on the rail part; A milling preparation step of preparing the milling machine by moving the milling machine to a position where the milling of the structure is required; A milling operation step of performing a milling operation when the milling machine is moved to a predetermined position; .

Description

Technical Field [0001] The present invention relates to a milling apparatus for a cylindrical structure, and a milling method using the milling apparatus. [0002] MILLING APPARATUS AND METHOD FOR CIRCULAR STRUCTURE [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical structure milling apparatus and a milling method using the same. More particularly, the present invention relates to a cylindrical structure milling apparatus, If the milling device is installed outside of the structure to repair the cracks in the structure or to mill the part for welding, etc., it is possible to facilitate the milling work through the milling device even if the worker does not climb or hang on the outside of the high structure. The present invention relates to a cylindrical structure milling apparatus capable of performing a milling operation very quickly and safely, and a milling method using the same.

Generally, in the industrial field, a large structure made of various shapes such as cylindrical shape and square shape is used for transportation or storage.

Such large structures may become aged after a long period of time after installation, or if cracks or breakage occur in various parts for various reasons, if the operator hangs up in the air at a certain height outside the structure through a lifting device or climbs through a ladder After attaching a separate safety device, it will come to the maintenance work.

Meanwhile, as an example of the large structure as described above, a structure such as a circular special cask (CASK) may be used.

Nuclear power plants use cask made of metal containers to safely protect spent nuclear fuel from external impact to transport or store nuclear waste.

The cask may be provided with a housing space provided therein, and a container-shaped body having a thick wall may be provided so as to have a structure in which a neutron shielding material of a predetermined thickness surrounds the cask. The cask is designed to improve efficiency and workability Submerged arc welding (SAW) is mainly used, but the deep penetration depth is large and the amount of heat input is low, which lowers the low temperature toughness of welded joints. As a result, the safety of the cask is low There was another problem of losing.

In addition, since the cask is very large and has a large cylindrical structure, it is difficult to manufacture the cask in one piece. Therefore, the cask can be manufactured by dividing the unit block into a plurality of unit blocks and then combining the divided unit blocks.

Meanwhile, in recent years, the body of the cask is made to be heterogeneous. In the case where the body of the cask is differently constructed as described above, in order to engage the body parts of mutually overlapping parts, So that the fastening members are fastened at predetermined intervals.

In this case, the body of the cask may be cracked at a cross-section of the portion through which the fastening member penetrates. In order to perform welding work for repairing such cracks, at the outer surface of the cask, The milling work was required to the part.

However, in the case of the large cylindrical structure as described above, that is, in the case of the conventional cask, it is difficult to move to another place for work. Therefore, when the milling operation is performed in the field as a preceding work for welding, It was possible to cause a safety accident during the work because the work machine was lifted up to a certain height of the cask and hanged in the air and the work was carried out. In the state where the cask was hanged or raised in the air, Since the machining work must be performed continuously at regular intervals, it was a very difficult and hard work that the work was difficult and the worker easily tired.

Therefore, the repairing operation of the large cylindrical structure as described above has been inevitably slowed down. As described above, in various industrial sites, when a milling operation is required as a preceding operation for repairing a large structure, A machining apparatus capable of performing milling work of a large structure in a safe and prompt manner was desperately required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a milling machine and a railway machine in which a weight portion and a milling machine are secured to the outside of a cylindrical structure having a certain radius, The present invention provides a cylindrical structure milling apparatus capable of easily performing milling work on the outer surface of a workpiece through a milling machine installed so as to be movable along a rail portion and a method of milling using the same.

It is another object of the present invention to provide a milling apparatus and a milling apparatus capable of easily performing a milling operation on an outer surface of a workpiece for a welding operation or the like even if the worker hangs or does not work hardly in a state of climbing up through a ladder, The present invention provides a cylindrical structure milling apparatus and a milling method using the same, which enable a continuous milling work of the object to be processed through the milling apparatus, thereby enabling a safe and quick milling work.

According to an aspect of the present invention, there is provided a milling apparatus for milling a cylindrical structure, the milling apparatus being installed outside a cylindrical structure having a predetermined radius, the milling apparatus comprising: A rail part arranged to surround the rail part; And a guide rail which is guided by a main shaft and a guide rail which are installed to be movable along the outer circumference of the structure and in which the cutting tool is disposed in a direction orthogonal to the outer surface of the structure, A milling machine including an LM guide unit for inducing a descent; A winch means constituted of a plurality of winches which are seated and fixed to the upper portion of the structure and operated to raise or lower the rail portion or the milling machine through the wire wound on the winch; .

Further, in the cylindrical structure milling apparatus according to the present invention, the rail section is constituted by a pair of upper and lower rails which are arranged at a predetermined height in a predetermined height portion of the structure, and the upper and lower rails, A first side rail and a second side rail each of which is divided into a pair, and the first side rail and the second side rail are arranged facing each other toward the outer surface of the structure.

Further, in the cylindrical structure milling apparatus according to the present invention, the rail portions are arranged at regular intervals along the longitudinal direction of the upper and lower rails so that both end portions in the longitudinal direction are perpendicular to the upper and lower rails And further comprises a plurality of support rods which are coupled to each other.

Further, in the cylindrical structure milling apparatus according to the present invention, the milling machine may include an upper roller on which the roller is seated above the upper rail and a lower roller that is in rolling contact with the lower portion of the lower rail, And fixing means for moving the lower roller up and down so as to be supported in a state of being closely attached to the lower end of the lower rail or to be separated from the lower rail.

Further, in the cylindrical structure milling apparatus according to the present invention, the upper rail and the lower rail have a rhombic cross section.

Further, in the cylindrical structure milling apparatus according to the present invention, the winch means comprises an X-shaped fixed frame extended and fixedly extended so as to cross the center in the cross direction on the upper surface of the structure, And at least one pair of winchs installed at each end of the stationary frame, wherein a pulley is installed at each end of the stationary frame so that the wire wound on the winch can be vertically lifted from the outside of the circumference of the structure .

The milling machine according to the present invention is characterized in that the milling machine comprises a bed frame provided with the roller at the front side and the LM guide unit at the rear side and vertically arranged outside the structure, A vertical axis moving block mounted on the rear of the LM guide unit and capable of moving up and down in the longitudinal direction of the bed frame by being guided through the LM guide unit, A horizontal axis moving block which can be moved back and forth in the lateral direction of the bed frame through a ball screw, and a horizontal axis moving block connected to the main axis and the horizontal axis moving block in a curved structure so that the cutting tool moves in a direction perpendicular to the outer surface of the structure One side of which is fixed to the horizontal axis moving block and the other side of which is perpendicular to the outer surface of the structure The angle forming bracket is connected to one side of the angle forming bracket so that the main shaft is vertically guided on the other side so that the main shaft can be moved back and forth in a direction close to or away from the outer surface of the structure And a front and rear shaft guide block.

A method of milling a cylindrical structure according to the present invention is a milling method for a cylindrical structure using a milling device, the method comprising: a winch installation step in which the winch means is fixed to an upper surface of the structure; A rail mounting step of coupling the rail portion to surround the structure; A milling machine installation step of installing the milling machine on the rail by lifting the milling machine through the winch unit; A rail and a work machine lifting step for lifting the rail part and the milling machine while the milling machine is installed on the rail part; A milling preparation step of preparing the milling machine by moving the milling machine to a position where the milling of the structure is required; A milling operation step of performing a milling operation when the milling machine is moved to a predetermined position; .

A method of milling a cylindrical structure according to the present invention includes: a milling fixing step of closely fixing the roller of the milling machine to the rail part in a state where the milling machine is installed on the rail part; And further comprising:

According to the cylindrical structure milling apparatus and the milling method using the cylindrical structure milling apparatus according to the present invention, when the milling operation is required on the outer surface of the object to be welded, the worker directly ascends to the outer side of the object to be processed A milling machine provided so as to be able to move along the rail portion can smoothly perform the milling work on the outer surface of the workpiece and can perform the continuous milling work of the workpiece, It has a possible advantage.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the entire configuration of a cylindrical structure milling apparatus according to an embodiment of the present invention; FIG.
2 is an exploded perspective view showing a rail portion of a cylindrical structure milling apparatus according to an embodiment of the present invention;
3 is a perspective view illustrating a milling machine of a cylindrical structure milling apparatus according to an embodiment of the present invention.
FIG. 4 is a side view showing a state in which a milling machine of a cylindrical structure milling apparatus according to an embodiment of the present invention is coupled to a rail. FIG.
FIG. 5 is an enlarged view of a portion A of FIG. 4 and shows a state of use for showing an operation example of the fixing means. FIG.
6 is a perspective view illustrating a winch unit of a cylindrical structure milling apparatus according to an embodiment of the present invention;
7 is a flowchart illustrating a milling method using a cylindrical structure milling apparatus according to an embodiment of the present invention.
FIG. 8 and FIG. 9 are flowcharts showing work steps of a milling method using a cylindrical structure milling apparatus according to an embodiment of the present invention. FIG.

Hereinafter, a cylindrical structure milling apparatus (hereinafter referred to as a "milling apparatus") according to the present invention and a milling method using the same will be described in detail with reference to the embodiments shown in the drawings.

FIG. 1 is a perspective view showing an overall configuration of a cylindrical structure milling apparatus according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a rail part of a cylindrical structure milling apparatus according to an embodiment of the present invention, FIG. 3 is a perspective view illustrating a milling machine of a cylindrical structure milling apparatus according to an embodiment of the present invention. FIG. 4 is a cross- FIG. 5 is an enlarged view of a portion A of FIG. 4 to show an operation example of the fixing means, and FIG. 6 is a side view of the winch unit of the cylindrical structure milling apparatus according to the embodiment of the present invention. Fig.

Referring to the drawings, a milling apparatus 1 according to an embodiment of the present invention includes a milling apparatus (not shown) installed outside a cylindrical structure having a predetermined radius (hereinafter, referred to as an "object to be processed" , A rail part (10), a milling machine (20), and a winch unit (30).

First, in the embodiment of the present invention, the cylindrical object, that is, the object 2 to be milled using the milling apparatus 1 may be a cask used in a nuclear power plant.

The cask is a cylindrical heavy structure used for transporting or storing spent nuclear fuel in a nuclear power plant. In this case, the cask has a cylindrical body 2a having a predetermined height, And a lid portion 2b covering the upper opening to shield the space.

The rail part (10) is arranged so as to be wrapped around the outer periphery of the object at a predetermined height of the object.

The rail part 10 is configured such that the milling machine 20 described later can be moved along the circumferential direction of the structure. The rail part 10 is provided at a predetermined height portion of the object 2 so as to be vertically spaced And a pair of rails 11 and 12.

The pair of rails are constituted by a pair of upper and lower rails 11 and 12 spaced apart from each other by a predetermined distance in a predetermined height portion of the body 2b of the object 2.

1 and 2, the upper rail 11 and the lower rail 12 may be formed of a plurality of split type rails having a circular shape, and in an embodiment of the present invention, The first side rails 11a and 12a and the second side rails 11b and 12b, each of which is divided into a pair.

The first side rails 11a and 12a and the second side rails 11b and 12b are each hemispherical and have engagement surfaces 111 and 121 which are flange-joined to each other at their both ends through an interlocking member .

Therefore, in the embodiment of the present invention, the first side rails 11a, 12a and the second side rails 11b, 12b are arranged to face each other toward the outer surface of the object to be processed, Can be firmly coupled.

At this time, the operation of joining the first side rails 11a, 12a and the second side rails 11b, 12b of the upper rail 11 and the lower rail 12, It will be easy to do in the field. That is, even if the worker does not go up to the high position of the object 2, the worker precedes the work of coupling the upper rail 11 and the lower rail 12 to the lower side of the object 2 on the ground The upper rail 11 and the lower rail 12 are lifted up through a winch means 30 which will be described later up to a predetermined height point at which the upper rail 11 and the lower rail 12 are to be installed, It is possible to carry out a simple finishing work for firmly connecting the fastening members of the fastening members.

The rails 10 further include a plurality of support rods 13 connected to the upper rails 11 and the lower rails 12 so as to connect the upper ends of the upper rails 11 and the lower rails 12 vertically.

The plurality of support rods 13 are arranged at predetermined intervals along the longitudinal direction of the upper rail 11 and the lower rail 12 and are coupled to each other. The first and second side rails 11a and 12a and the pair of second side rails 11b and 12b are vertically spaced apart from each other.

Thus, the roller 211 of the milling machine 20 described later can be stably moved along the rail part 10. [

At this time, in the embodiment of the present invention, the upper rail 11 and the lower rail 12 have a rhombic cross-section. It is easy to work such that the upper and lower rails 11 and 12, that is, the first and second side rails 11a and 12a and the second side rails 11b and 12b are arc- So that the rollers 211 of the milling machine 20 can be stably supported only by the operation of placing them. In addition, when the upper and lower rails 11 and 12 of the rhombic shape are divided into a pair of equally spaced rails, it is very easy to process the joints by welding or separately joining them so as to form an arc An effect is generated.

That is, when the upper rail 11 and the lower rail 12 are formed in an "I" shape, the rollers 211 of the milling machine 20 are rotated in the upper and lower rails 11, The rail is formed in a rhombic shape so that the rollers 211 are mounted on the fixing means 250 of the milling machine 20 to be described later, So that the milling machine 20 can be stably moved along the rail part 10. [0035]

The milling machine 20 is installed outside the object 2 to perform a milling operation. The milling machine 20 includes a bed frame 210, a main shaft 220, An LM guide unit 230, a conveying unit 240, and a fixing unit 250. [

Referring to FIG. 3, the bed frame 210 is vertically connected to the rail part 10 so as to be movable along the outer circumference of the object 2.

The bed frame 210 may have a length sufficient to correspond to the distance between the upper rail 11 and the lower rail 12.

The roller 211 is disposed in front of the bed frame 210 so that the roller 211 can be seated on the upper end of the upper rail 11 from one side in the longitudinal direction of the bed frame 210, Which can be supported in a rolling contact with the lower end of the lower rail 12 by the fixing means 250 described later on the other side of the bed frame 210 in the longitudinal direction, And a lower roller 211b.

In addition, the bed frame 210 is formed with a pair of hooking portions 212 on one side in the longitudinal direction, that is, on both sides of the upper end so as to be lifted by the winch means 30 described later.

When the bed frame 210 is moved along the rail part 10 by the rollers 211, the milling machine 20 is stably positioned in a state of being spaced apart from the outer surface of the object 2 by a predetermined distance And a guide member 213 for guiding the guide member 213 to be movable.

The guide member 213 includes a pair of upper guides 213a protruding from both sides of the longitudinal direction of the bed frame 210 and a pair of upper guides 213b protruding from both sides of the bed frame 210 And a pair of lower guides 213b.

In addition, the pair of upper guides 213a and the pair of lower guides 213b are structured so that the ball screws can be operated in the forward and backward directions.

The main shaft 220 has a configuration in which the cutting tool 221 is disposed in a direction orthogonal to the outer surface of the object 2.

The main shaft 220 moves the cutting tool 221 in the up, down, left, right, and forward directions through the LM guide unit 230 and the transfer means 240, which will be described later.

The main shaft 220 stably supports a chuck 222 connected to a spindle rotated by receiving power from a motor and is driven by the milling processing operation through the cutting tool 221 mounted on the chuck 222. [ .

The LM guide unit 230 is guided by the guide rail 231 to guide the up and down movement of the main shaft 220.

In the present invention, the LM (Linear Motion) guide unit adopts a linear motion system commonly used in the art. The linear motion system includes a servo motor or a linear motor that generates a driving force, a spline shaft, a linear actuator, The LM guide block and the rail are fastened to the screw or the like so that the necessary constituent devices are moved forward and backward in accordance with the forward and backward movement of the LM guide block. Therefore, in the present invention, a specific configuration of the LM guide unit 230 and a part of the configuration of the conveying unit 240, which will be described later, are the same or similar to those of a normal milling apparatus, A detailed description of the operation of the LM guide unit will be omitted.

The conveying unit 240 is guided through the LM guide unit 230, and the main shaft can be transferred vertically, horizontally, and longitudinally.

The conveying unit 240 may include a vertical axis moving block 241, a horizontal axis moving block 242, an angle forming bracket 243, and a front and rear axis guide block 244.

The vertical axis moving block 241 is mounted on the rear side of the bed frame 210 and guided through the LM guide unit 230 to move up and down in the longitudinal direction of the bed frame 210 The horizontal axis moving block 242 is mounted on the rear side of the general axis moving block 241 and is moved forward and backward in the lateral direction of the bed frame 210 through a ball screw rotated by receiving the power of the horizontal motor And the front and rear shaft guide block 244 is rotatably supported by the main shaft 220 so that the main shaft 220 can be moved forward or backward in a direction toward or away from the outer surface of the object 2, .

The vertical movement block 241, the horizontal axis movement block 242, and the front and rear axis guide block 244, as well as the LM guide unit 230, The configuration may be universally configured in a conventional milling apparatus, and some of such configurations may be combined with each other in a variety of ways in a conventional milling apparatus so that the milling apparatus can move the tool in the X-, Y-, . A handle capable of being operated to move the vertical axis moving block 241, the horizontal axis moving block 242 and the front and rear axis guide block 244 in the X axis, the Y axis, and the Z axis, It will be appreciated that members such as a motor, a ball screw, and a gear may be provided, and therefore, a detailed description thereof will be omitted.

Meanwhile, in the embodiment of the present invention, the conveying unit 240 includes the angle forming bracket 243.

The angle forming bracket 243 is configured such that the cutting tool 221 which can be vertically mounted on the main shaft 220 can correspond to the cylindrical outer surface of the object 2 in a vertical direction.

The angle forming bracket 243 has one side fixed to the horizontal axis moving block 242 and the other side formed with a coupling surface orthogonal to the outer surface of the object to be processed 2, So as to be in line with the center of the center of gravity.

In a state where one side of the front and rear axial movement block 244 is vertically coupled to the coupling surface of the angle forming bracket 243, the main shaft 220 is attached to the other side of the front and rear axial movement block 244 The main shaft portion 220 and the horizontal axis moving block 242 can be curved with each other so that the cutting tool 221 mounted on the main shaft portion 220 can be moved It is arranged in a direction orthogonal to the outer surface of the object to be subjected to the milling work.

In the milling apparatus 1 according to the embodiment of the present invention, the lower roller 211b is fixed to the lower end of the lower rail 12, And the fixing means 250 for moving up and down the movable member 211b.

When the roller 211 provided in front of the bed frame 210 is composed of the upper roller 211a and the lower roller 211b, The fixing unit 250 may be fixed to the fixing table 251 through the guide hole 252 and the fixing member 253 and the tightening unit 253. In this embodiment, 254).

4 and 5, the fixing table 251 is integrally connected to the lower roller 211b to rotatably support the lower roller 211b, A horizontal surface capable of being press-supported by the means 254 is formed at the lower end.

The guide holes 252 are formed to be elongated by a predetermined length in the vertical direction at a position in parallel with the fixing table 251 of the bed frame 210.

The fixing member 253 is inserted into the guide hole 252 in a vertical direction so that the fixing member is fixed at a predetermined height along the guide hole 252.

The tightening means 254 is configured to support the horizontal plane of the fixing table 251 so that the fixing table 251 can move up and down. When the fixing member 253 is tightened or loosened in a state in which the fixing member 253 is loosened, Can be easily adjusted so as to raise or lower the slider 253.

When the milling machine 20 is to be installed in the roller unit 10, the fixing unit 250 may be operated to release the tightening unit 254 so that the lower roller 211b is rotated in the guide hole 252, The upper roller 211 is first placed on the upper rail 11 in a state where the upper roller 211 is positioned below the upper rail 11 and then the fixing unit 251 is raised by a predetermined height by adjusting the tightening means 254, So that the roller 211b is brought into close contact with the lower end of the lower rail 12 so as to be in rolling contact therewith.

Therefore, the milling apparatus 1 according to the embodiment of the present invention can easily mount the milling machine 20 to the rail part 10 in weight by the simple adjustment of the fixing means 250, The milling machine 20 is installed so as to be stably movable along the rail part 10.

The winch unit 30 is configured to raise the rails 10 and the milling machine 20 up or down to a predetermined height of the object 2.

Referring to FIG. 6, in an embodiment of the present invention, the winch means 30 includes a fixed frame 31, a plurality of winches 32, and a pulley 33.

The fixed frame 31 has a structure in which the plurality of winches 32 are stably fixed to the upper portion of the object 2 and the milling machine 20 is lifted by the winch 32 And can be firmly fixed to the upper surface of the object 2 through the fastening member.

Accordingly, the fixed frame 31 may be formed to have a cross shape or a " + "shape with a size corresponding to the upper surface of the lid portion 2a of the object 2.

At this time, the stationary frame 31 is provided with a plurality of lifting hooks which can be lifted and lowered by a device such as a crane so that the installation direction of the fixed frame 31 can be different from that of the upper surface of the object 2. Accordingly, the fixed frame 31 can be detachably coupled with the upper surface of the object 2 while being rotated at a predetermined angle.

The plurality of winches 32 are fixedly mounted to the longitudinal end portions of the fixed frame 31. The pair of winch 32 may be mounted at mutually opposite positions. The winch 32 may be composed of four winches 32 such that two pairs of the winch 32 are installed in the mutually facing directions as shown in FIG.

The four winches 32 are integrally mounted by the fixed frame 31 of the cross shape and can be arranged at regular intervals in the four directions along the circumference of the upper end portion of the object 2, The wire 32a wound on the winch 32 is connected to operate the rails 10 and the milling machine 20 to move up or down.

The pulley 33 is constructed so that the wire wound around the winch 32 can be vertically raised and lowered outside the periphery of the structure so that the wire 32a wound on the winch 32 is wound or unwound. It assists to reliably lift the rail part 10 and the milling machine 20 without being caught by the lid part 2a of the object 2. [

Hereinafter, a method for milling a cylindrical structure according to the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIG. 7 is a flowchart illustrating a milling method using a cylindrical structure milling apparatus according to an embodiment of the present invention. FIGS. 8 and 9 illustrate a milling process using a cylindrical structure milling apparatus according to an embodiment of the present invention. Fig. 3 is a flowchart showing the operation steps of the method. Fig.

The milling method (hereinafter referred to as "milling method") using a cylindrical structure milling apparatus according to an embodiment of the present invention includes a winch installation step S10, a rail installation step S20, A machine mounting step S30, a rails and a machine lifting step S40, a milling preparation step S50, and a milling operation step S60.

The winch installing step S10 is a step of fixing the winch means 30 to the upper surface of the object 2 to be fixed.

The winch installation step S10 is to lift the fixed frame 31 to the upper part of the object 2 by means of a device such as a crane to determine the placement direction of the winch 32 installed in all directions, 31 are firmly fixed to the upper surface of the object 2, that is, the upper surface of the lid 2a of the object 2 through the fastening member.

The step of mounting the rail (S20) is a step of coupling the rail part (10) so as to surround the object (2).

At this time, it is preferable that the rail installation step S20 is performed on the ground, and the worker has a pair of the upper rails 11 and the lower rails 12 and the plurality of support rods 13 on the ground, A step of assembling to wrap the periphery of the object 2 is performed.

That is, the rail mounting step S20 may include a step of connecting the first side rails 11a, 12a and the second side rails 11b, 12b of the upper rail 11 and the lower rail 12, So that it can be easily and easily performed at the site where the object 2 is located.

The machining machine installation step S30 is a step of installing the milling machine 20 on the rail part 10 by lifting the milling machine 20 through the winch part 30. [

Therefore, in the embodiment of the present invention, the machine installation step S30 may include a processor lifting step S31, a machine mounting step S32, and a processor fixing step S33.

In the lifting step S31, the wire 32a wound on the winch 32 is hooked on the hooking portion 212 of the milling machine 20, while the milling machine 20, 10 so that they can be moved easily.

That is, the lifting step S31 may be omitted when at least a plurality of workers lift up the milling machine 20 by gravity. However, in an embodiment of the present invention, So that the milling machine (20) can be easily installed through the means (30).

The machine placing step S32 is a step of first placing the upper roller 211a of the rollers 211 of the milling machine 20 on the upper rail 11. [

That is, since the upper rail 11 and the lower rail 12 are formed in a rhombic cross-section, the upper roller 211a of the milling machine 20 is inserted into the rail part 10, So that it can be stably supported only by the operation of resting on the upper rail 11. [

The machining machine fixing step S33 is a step of closely fixing the roller 211 of the milling machine 20 to the rail part 10 in a state where the milling machine 20 is installed on the rail part 10. [

That is, in the machining machine fixing step S33, the milling machine 20 is supported by the fixing unit 250 in a state where the milling machine 20 is temporarily placed on the rail part 10 in the machining machine mounting step S32, The upper and lower ends of the milling machine 20 are stably supported along the upper and lower rails 11 and 12 by closely fixing the roller 211b to the lower end of the lower rail 12 in a rolling contact manner, , The milling machine (20) is allowed to roll and roll along the rail (10).

Accordingly, the milling method according to an embodiment of the present invention can easily install the milling machine 20 on the rail part 10 even with a small work force, so that the preparation work for milling can be performed very quickly and safely It will be possible to proceed.

The rail and the machine lifting step S40 is a step of lifting the rail part 10 and the milling machine 20 while the milling machine 20 is installed on the rail part 10. [

8, the rails and the machine lifting step S40 are carried out in a state where the milling machine 20 is installed on the rail part 10 through the machine installation step S30, And the joining surfaces 111 and 121 of the upper rails 11 and the lower rails 12 to fasten the fastening members so that the rails 10 are fastened to the upper surface of the object 2 So that it can be firmly fixed on the circumferential surface.

The milling preparation step S50 is a step of preparing the milling machine 20 by moving the milling machine 20 to a position where the milling of the object 2 is required.

9, the milling preparation step S50 is a step in which the milling machine 20 moves the workpiece 2 in a state where the rail part 10 is firmly engaged at a predetermined height of the object 2, In the circumferential direction of the rail part 10, that is, to a predetermined position.

That is, the milling preparation step S50 is performed in a state where the milling machine 20 is stably fixed to the rail part 10 via the fixing unit 250, along the outer peripheral surface of the object 2 And can be moved in the horizontal direction by a certain distance toward the left or right.

In the milling preparation step S50, in a state where the winch 32 is disassembled from the rail part 10 or the milling machine 20 so that the milling machine 20 can be easily moved, The wire 32a of the winch 32 is fastened to the hook ring formed on the engaging surfaces 111 and 121 of the rail part 10 so that the rail part 10 can be moved An embodiment in which the problem of falling due to the own weight of the milling machine 20 is prevented is also sufficiently possible.

The milling operation step (S60) is a step of performing a milling operation when the milling machine is moved to a predetermined position.

That is, the milling operation step S60 is a step of cutting the milling machine 20 while the milling machine 20 is moved along the rail part 10 so as to be disposed at a predetermined position of the object 2 The main shaft 222 on which the tool 221 is mounted is moved upward or downward by a predetermined distance to perform a milling operation, that is, a cutting operation.

The milling device and the milling method according to the present invention are characterized in that the rail part (10) and the milling machine (20) as a weight are connected to each other through the winch device (30) So that it can be easily installed outside.

Further, through the milling machine 20 thus installed, the worker can perform the milling work on the object 2 very quickly and at the same time can safely perform the work, Even if the worker hangs outside the object 2 or does not work hardly in a state of climbing up through a ladder or the like, the milling operation of the object 2 can be carried out very easily through the simple installation of the milling apparatus 1 of the present invention An effect that can be conveniently performed is generated.

The cylindrical structure milling apparatus and the milling method using the same as described above and shown in the drawings are only one embodiment for carrying out the present invention and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the following claims, and the embodiments improved and changed without departing from the gist of the present invention are obvious to those having ordinary skill in the art to which the present invention belongs It will be understood that the invention is not limited thereto.

1 Milling device 2 Object to be processed
10 rail part 11 upper rail
12 Lower rail 13 Multiple support rods
11a, 12a First side rails 11b, 12b Second side rails
20 Milling machine 210 bed frame
211 roller 211a upper roller
211b lower roller 212 hooking portion
213 guide member 220 spindle
221 Cutting tool 222 chuck
230 LM Guide Unit 231 Guide rail
240 conveying means 241 vertical axis moving block
242 Horizontal axis moving block 243 Angle forming bracket
244 Axis moving block 250 Fixing means
260 winch means 31 fixed frame
32 Winch 33 Pulley

Claims (9)

1. A milling apparatus for milling work installed outside a cylindrical structure having a predetermined radius,
A rail portion disposed to surround the structure at a predetermined height;
A bed frame provided vertically movably along the outer periphery of the structure and provided with rollers which are seated on the rail, a main shaft and a guide rail on which cutting tools are arranged in a direction orthogonal to the outer surface of the structure, A milling machine including an LM guide unit for guiding the upward and downward movement of the main shaft;
A winch means comprising a winch seated and fixed to the upper portion of the structure and operated to raise or lower the rail or the milling machine through a wire wound on the winch; Including,
The rail portion includes a pair of upper and lower rails spaced apart from each other by a predetermined distance in a predetermined height portion of the structure, and both end portions in the longitudinal direction are connected to the upper rail and the lower rail vertically, And a plurality of support rods arranged at predetermined intervals along the longitudinal direction of the lower rail,
Wherein the milling machine comprises an upper roller on which the roller is seated above the upper rail and a lower roller which is in rolling contact with the lower part of the lower rail,
Further comprising fixing means for moving the lower roller up and down so that the lower roller is supported or detached in a state of being closely attached to the lower end of the lower rail,
The fixing means may include a fixing block for rotatably supporting the lower roller, a guide hole formed in a longitudinal direction of the fixing block so as to have a predetermined length in the vertical direction, And a tightening means for tightly or loosely adjusting the fixing member in a state that the fixing member is loosened to support the fixing base movably up and down,
The winch unit may further include a fixed frame fixedly coupled to an upper surface of the structure so that a plurality of winches are arranged at regular intervals along the circumference of the upper end,
Wherein the fixed frame is rotatably and detachably coupled to the upper surface of the structure at a predetermined angle. The method according to claim 1,
The upper rail and the lower rail each comprise a first side rail and a second side rail each of which is divided into a pair and the first side rail and the second side rail are opposed to each other and coupled to the outer surface of the structure And a cylindrical structure milling apparatus. delete delete The method according to claim 1,
Wherein the upper rail and the lower rail have a rhombic cross-section. The method according to any one of claims 1, 2, and 5,
Wherein the winch unit is integrally mounted to the fixed frame so that the plurality of winches are arranged at regular intervals along the circumferential direction of the upper end of the structure,
Further comprising: a pulley installed so that a wire wound on the winch can be vertically lifted and lowered from a periphery of the structure. The method according to any one of claims 1, 2, and 5,
The milling machine further comprises a feeding means which is guided through the LM guide unit and is capable of feeding the main shaft in the up-and-down, left-right and forward-backward directions,
The conveying means includes a vertical axis moving block mounted at the rear of the bed frame and guided through the LM guide unit so as to be able to move up and down in the longitudinal direction of the bed frame, A horizontal axis moving block which can be moved back and forth in a lateral direction of the bed frame through a rotating ball screw by receiving the power of the horizontal axis moving block and the horizontal axis moving block, An angle forming bracket having one side fixed to the horizontal axis moving block and the other side being perpendicular to an outer surface of the structure so as to be disposed in a direction orthogonal to the outer surface of the structure, In order that the main shaft can be moved forward or backward in a direction close to or away from the outer surface of the structure, And a front and rear shaft guide block connected to the base shaft so as to be guided. A method of milling a cylindrical structure using the milling apparatus according to claim 1,
A winch installation step in which the winch means is fixedly installed on an upper surface of the structure;
A rail mounting step of coupling the rail portion to surround the structure;
A milling machine installation step of installing the milling machine on the rail by lifting the milling machine through the winch unit;
A rail and a work machine lifting step for lifting the rail part and the milling machine while the milling machine is installed on the rail part;
A milling preparation step of preparing the milling machine by moving the milling machine to a position where the milling of the structure is required;
A milling operation step of performing a milling operation when the milling machine is moved to a predetermined position; Wherein the milling process is performed by using a cylindrical structure milling apparatus. 9. The method of claim 8,
A milling fixing step of closely fixing the rollers of the milling machine to the rail part in a state where the milling machine is installed on the rail part; Wherein the method further comprises the step of milling the cylindrical structure.

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