KR101439335B1 - Flange cutting device - Google Patents

Abstract

The present invention relates to a flange cutting device comprising: a fixing part fixing a flange by covering the flange connected to a pipe; a moving part able to move along the circumference of the fixing part; and a torch part connected to the moving part, which at least some part is moved along the circumference of the pipe as the moving part moves, and cutting the pipe. Provided is a flange cutting device which does not require an extra improvement work of a cutting surface of the pipe because the cutting surface can be even as the torch part cuts a pipe by moving along the circumference of the pipe.

Description

Flange cutting device

The present invention relates to a flange cutter.

In general, piping is used as an example for conveying various fluids. At this time, if the distance for transporting the fluid is relatively long, it is necessary to use a long pipe. However, it may be difficult to manufacture a long pipe. In order to solve this problem, it is possible to consider a case where two pipes are connected to each other. In order to connect the two pipes, a flange having a larger outer diameter than the pipe can be connected through welding or the like and the flanges can be bolted to each other .

On the other hand, even when the flange is connected to the pipe or after the flange is connected to the pipe, the flange is erroneously welded to the pipe, for example, in a distorted manner, or the material of the flange welded to the pipe is wrongly selected, Problems such as poor quality of the flange may occur. When such a problem occurs, it is desirable to replace the flange connected to the pipe. Conventionally, a worker manually carries out a process of cutting a pipe connected to the flange by a torch.

However, if the pipe is manually cut, the cut surface of the pipe becomes uneven, and it may be difficult to re-weld the new flange to the cut pipe. Therefore, the cutting surface of the piping is improved by a separate equipment. In this case, the cost and the time required for the piping are high, resulting in a problem of inefficiency.

SUMMARY OF THE INVENTION The present invention provides a flange cutter in which the cutting surface of a pipe is uniform when a pipe connected to a flange is cut, thereby saving cost and time due to a separate improvement work.

A flange cutter according to an embodiment of the present invention includes a fixed portion surrounding a flange connected to a pipe to fix the flange, a movable portion movable along the periphery of the fixed portion, and a movable portion connected to the movable portion, And a torch portion for cutting at least a part of the pipe along the circumference of the pipe.

Here, the fixing unit may include a plurality of sub-fixing units, and a joining member for joining the sub-fixing units.

The outer side surface of the fixing portion may be provided with a first guide portion for guiding movement of the moving portion.

The first guide portion may be a first gear portion.

The moving unit may include a driving unit, and a second gear unit rotated by receiving the driving force of the driving unit, the second gear unit being engaged with the first gear unit.

The controller may further include a controller for controlling power and rotational speed of the driving unit.

The outer surface of the fixing part may be provided with a second guide part for guiding movement of the moving part.

Further, the second guide portion may be a groove portion.

The moving part may be provided with a roller part that is rotated by friction while being in contact with the groove part.

The flange may further include a fitting portion coupled to an outer surface of the flange and interposed between the flange and the fixing portion.

In addition, the fitting portion may be coupled to the outer surface of the flange so as to be spaced apart from each other.

In addition, the moving unit may further include a tension unit that pulls the moving unit in the direction of the fixed unit.

According to another aspect of the present invention, there is provided a flange cutter comprising: a fixing portion for fixing a flange connected to a pipe to an upper portion thereof; a moving portion disposed at a lower portion of the fixing portion and rotatable; At least a part of which is rotated along the circumference of the pipe, and includes a torch portion for cutting the pipe.

The fixing unit may further include a height adjusting unit having a shaft portion penetrating the moving unit and connected to the fixing unit, the height adjusting unit adjusting a height of the fixing unit.

The shaft portion of the height adjusting portion may support the moving portion so as to be rotatable.

Further, the apparatus may further include a support portion located at a lower portion of the moving portion, and the shaft portion of the height adjusting portion may penetrate the support portion to fix the support portion.

The moving part may include a body part and an extension part extending from the body part and connected to the torch part.

The supporting portion may include a first supporting portion fixed to the shaft portion of the height adjusting portion and a second supporting portion positioned between the first supporting portion and the moving portion and having an opening therein.

The body portion of the moving portion may include a first body portion located on the second support portion and a second body portion connected to the first body portion and spaced from the first support portion inside the opening portion of the second support portion, 2 body portion.

Further, it may further include a driving unit having a third gear unit, and a fourth gear unit coupled to the third gear unit may be provided on an outer surface of the second main unit.

The apparatus may further include a pedestal positioned below the height adjuster to support the height adjuster.

The support unit may further include a support plate positioned below the height control unit, and a wheel unit connected to a lower portion of the support plate and having a plurality of wheels.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may appropriately define the concept of a term in order to best describe its invention The present invention should be construed in accordance with the spirit and scope of the present invention.

According to the flange cutter of the present invention, the piping is cut while the torch portion connected to the moving portion is moved along the pipe, so that the cutting surface of the pipe is uniform and no further improvement work is required, Can be saved.

1 is a perspective view of a flange cutter according to an embodiment of the present invention.
2 is an exploded perspective view of the fixing portion of the flange cutter shown in Fig.
Fig. 3 is a cross-sectional view of the flange cutter shown in Fig. 1 as viewed from the front; Fig.
4 is a plan view showing a state in which the first gear portion of the fixed portion of the flange cutter shown in FIG. 1 and the second gear portion of the moving portion are engaged.
5 is an exploded perspective view showing a fitting portion and a fixing portion of a flange cutter according to a modification of the flange cutter shown in FIG.
6 is a cross-sectional view of the flange cutter in a state where the fitting part and the fixing part shown in Fig.
7 is a perspective view of a flange cutter according to another embodiment of the present invention.
8 is a cross-sectional view of the flange cutter shown in Fig.
9 is a plan view showing a state in which the third gear portion of the driving portion of the flange cutter shown in FIG. 7 is engaged with the fourth gear portion of the moving portion.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and examples taken in conjunction with the accompanying drawings. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a flange cutter 100 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a fixing portion 110 of the flange cutter 100 shown in FIG. Hereinafter, the flange cutter 100 according to the present embodiment will be described with reference to the drawings.

1 and 2, the flange cutter 100 according to the present embodiment includes a fixing portion 110 for surrounding and fixing the flange 300, a movable portion 110 which is movable along the periphery of the fixing portion 110, And a toothed part 130 connected to the moving part 120 and cutting the pipe 310. [

The fixing portion 110 is a member that surrounds the flange 300 connected to the pipe 310 and fixes the flange 300.

Here, the fixing portion 110 is a fixed member that is not moved during the cutting process, and the flange 300 and the pipe 310 connected thereto can be prevented from moving during the cutting process. The fixing unit 110 may include a joining member (not shown) for joining the sub-fixing unit 111 and the sub-fixing unit 111, which are divided into a plurality of sub-fixing units 111. For example, as shown in FIG. 2, it is possible to have two sub-securing portions 111 each having a semicircular shape. At this time, the two sub-securing portions 111 are provided with threaded holes on both sides, By joining the coupling members embodied by the bolts into the holes, they can be coupled with each other. Further, the flange 300 can be positioned in the circular space while the sub-fixing portions 111 are engaged, thereby fixing the flange 300. At this time, ribs 114 may be provided on the upper and lower portions of each sub-fixing part 111 so as to prevent the flange 300 from flowing in the vertical direction, thereby limiting the upward and downward flow of the flange 300. The protruding portion 115 may protrude from the rib portion 114 in the rib portion 114 of the sub fixing portion 111.

The outer surface of the fixing part 110 may be provided with a first guide part for guiding the movement of the moving part 120, which will be described later. 3 and 4) of the moving part 120 is provided in the first gear part 116. The second gear part 122 of the moving part 120 Can be engaged. At this time, the first gear portion 116 may be positioned in the form of a rail around the fixing portion 110. In addition, the outer surface of the fixing portion 110 may be provided with a second guide portion as a member capable of guiding the movement of the moving portion 120 additionally. Here, the second guide portion may be implemented as a groove portion 117, for example, and the roller portion 124 of the moving portion 120 may be guided in the groove portion 117. It should be noted that the first guide portion and the second guide portion are not limited to the first gear portion 116 and the groove portion 117 but may be any means capable of guiding the movement of the movement portion 120.

FIG. 3 is a cross-sectional view of the flange cutter 100 shown in FIG. 1, and FIG. 4 is a cross-sectional view of the flange cutter 100 shown in FIG. And the second gear portion 122 of the first gear portion 120 are engaged with each other. Hereinafter, the moving unit 120 and the fixing unit 110 according to the present embodiment will be described with reference to the drawings.

The moving part 120 is a member movable along the periphery of the fixing part 110. The moving part 120 is connected to the torch part 130 that performs the actual cutting process and the torch part 130 can move along the pipe 310 connected to the flange 300 to perform the cutting process . The moving part 120 also includes a driving part 121 and a second gear part 122 which is engaged with a first guide part implemented by, for example, a first gear part 116 as shown in FIG. 4 And the second gear portion 122 may be connected to the driving shaft of the driving portion 121 implemented by, for example, a motor. Accordingly, when the driving unit 121 is driven, the second gear unit 122 engaged with the first gear unit 116 rotates. The first gear unit 116 is in a fixed state, and the second gear unit 122 And can be moved along the circumference of the first gear portion 116. As a result, the entire moving portion 120 connected to the second gear portion 122 can be moved or revolved around the fixed portion 110.

At this time, the flange cutter 100 according to the present embodiment may further include a control unit 123. [ Here, the control unit 123 may control the driving unit 121 to adjust the power and rotational speed of the driving unit 121. More specifically, the control unit 123 can control the on / off state of the driving unit 121 and adjust the rotation speed of the second gear unit 122 by controlling the rotation speed, The moving speed of the driving unit 121 can be adjusted.

The moving unit 120 may further include a roller unit 124. Here, the roller unit 124 may have a separate shaft and may be rotatable, and the second gear unit 122 may not be provided with its own power means connected to the driving unit 121 to transmit the driving force. The roller portion 124 may be provided at a position corresponding to the groove portion 117 which is the second guide portion of the fixing portion 110 and may be rotated by the frictional force in contact with the groove portion 117 in the groove portion 117 . That is, when the moving part 120 is rotated, the roller part 124 can be rotated by the frictional force in contact with the groove part 117, thereby guiding the movement of the moving part 120 to provide a sense of stability.

The moving part 120 may be provided with a tension part 125 that closely contacts the moving part 120 in the direction of the fixing part 110. The tension unit 125 may include a rotating roller 126 extending from the main body of the moving unit 120. The rotating roller 126 rotates from the rib portion 114 of the fixing unit 110 It can come into contact with the protruding projection 115 and can be rotated due to frictional force. A tension is generated in the tension part 125 so that the moving part 120 can be prevented from moving away from the fixed part 110 and the moving part 120 is moved along the fixed part 110 A sense of stability can be provided.

The toe portion 130 is connected to the moving portion 120 and is moved together when the moving portion 120 is moved to cut the pipe 310 connected to the flange 300.

The torch portion 130 may include a torch 131 and a connecting portion 132 connecting the torch 131 and the moving portion 120. The connecting portion 132 may be formed by connecting the torch 131 to the pipe 310 The position of the torch 131 can be set so that the torch 131 faces. Thus, when the moving part 120 is rotated along the circumference of the flange 300, the torch 131 is rotated along the circumference of the pipe 310, thereby cutting the circumference of the pipe 310. At this time, the bar torch 131, in which the moving part 120 is stably moved along the circumference of the fixing part 110, is also stably moved so that the pipe 310 can be cut so that the cut surface of the pipe 310 is uniform. The flange 300 is erroneously welded to the pipe 310 or the material of the flange 300 welded to the pipe 310 is erroneously selected or the quality of the flange 300 welded to the pipe 310 is reduced It may be effective when a problem occurs and the flange 300 is to be replaced. In detail, it is easy to connect another flange to the pipe 310 so that the cut surface of the pipe 310 connected to the flange 300 should be uniform when the flange 300 is to be replaced. However, the flange cutter 100) is used, since the cut surface of the pipe 310 is uniform, it is easy to weld and use another flange. If the cutting surface of the pipe 310 is not uniform, it may take time and manpower to improve the welding of the pipe 310. Therefore, the flange cutter 100 according to the present embodiment can reduce the time and cost And can be very effective.

Meanwhile, the torch 131 may be, for example, an oxygen torch using oxygen.

5 is an exploded perspective view showing a fitting portion 140 and a fixing portion 110 of a flange cutter according to a modification of the flange cutter 100 shown in FIG. 1, and FIG. 6 is an exploded perspective view showing a fitting portion 140 And the fixing part 110 are coupled to each other. Hereinafter, the fitting portion 140 of the flange cutter according to the modified embodiment will be described with reference to FIG.

The fitting portion 140 may be coupled to the outer surface of the flange 300 and interposed between the flange 300 and the fixing portion 110. Therefore, it can be seen that the flange 300, the fitting portion 140, and the fixing portion 110 are sequentially positioned from the inner side. The fitting portion 140 is used to cut the flange 300 having a plurality of thicknesses into a single flange cutter 100, which will be described in detail with reference to FIG. For example, there is no problem in fixing the flange 300 using the fixing portion 110 when the outer diameter of the flange 300 and the inner diameter of the fixing portion 110 fit each other have. However, when the outer diameter of the flange 300 is smaller than the inner diameter of the fixed portion 110, the flange 300 may be pulled out or the gap may be generated from the fixed portion 110, It may be difficult to fix. At this time, the outer diameter of the fitting portion 140 can be fitted into the inner diameter of the fixing portion 110 by fitting the fitting portion 140 on the outer surface of the flange 300, (300) can be stably fixed. In addition, by providing the fitting portion 140 having various thicknesses and heights, it is possible to correspond to the flanges 300 having various outer diameters and heights, and accordingly, the various flanges 300 can be formed into a single flange cutter 100, It is possible to stably fix the fixing part 110 to the fixing part 110.

Meanwhile, the fitting portion 140 may be formed in a ring shape or a plurality of the fitting portions 140 may be spaced apart from each other as shown in FIG.

FIG. 7 is a perspective view of a flange cutter 200 according to another embodiment of the present invention, and FIG. 8 is a sectional view of the flange cutter 200 shown in FIG. Hereinafter, the flange cutter 200 according to the present embodiment will be described with reference to the drawings.

7 and 8, the flange cutter 200 according to the present embodiment includes a fixing portion 210 for fixing the flange 300 to an upper portion thereof, And a toe part 230 connected to the moving part 220 and cutting the pipe 310. [

The fixing part 210 can fix the flange 300 at the upper part, unlike the previous embodiment.

The protrusion 211 may be formed on the upper surface of the fixing part 210 and the protrusion 211 may be inserted into the fluid passage hole 301 or the bolt hole 302 of the flange 300, Can be fixed. Further, due to the fixing of the fixing portion 210, the flange 300 and the pipe 310 connected thereto may not move during the cutting process.

Meanwhile, the fixing portion 210 may be connected to the shaft portion 261 of the height adjusting portion 260 and supported on a ground, a facility, or the like.

9 is a plan view showing a state in which the third gear portion 241 of the driving portion 240 of the flange cutter 200 shown in FIG. 7 and the fourth gear portion 224 of the moving portion 220 are engaged. Hereinafter, the moving unit 220 according to the present embodiment will be described with reference to FIGS. 7 to 9. FIG.

The moving part 220 may be positioned below the fixing part 210 and be rotatable, i.e., rotatable. At this time, the shaft portion 261 of the height adjusting portion 260 located at the lower portion of the moving portion 220 is connected to the fixing portion 210, and the moving portion 220 may have the through hole 221 formed therein. The shaft portion 261 of the height adjusting portion 260 can pass through the through hole 221 formed in the moving portion 220 to fix and support the fixing portion 210. [ The moving part 220 may be supported on the shaft part 261 of the height adjusting part 260. The moving part 220 may be supported on the shaft part 261 using a ball bearing or the like so as to be rotatable. . The moving part 220 may include, for example, a body part 222 and an extension part 223. The main body part 222 may be formed of a member having a disk shape below the fixing part 210 and the extended part 223 may extend from the main body part 222 and be connected to the torch part 230.

Meanwhile, in this embodiment, as the member for rotating the moving unit 220, a driving unit 240 such as a motor may be included. The third gear portion 241 may be provided at an end portion of the drive shaft 240 of the drive portion 240. When the drive portion 240 is driven, the third gear portion 241 is rotated, . Specifically, the main body portion 222 of the moving portion 220 is located at a lower portion of the first main body portion 222a and the first main body portion 222a located below the fixing portion 210. For example, The second body portion 222b may include a fourth gear portion 224 which is engaged with the third gear portion 241. The fourth gear portion 224 may be formed on the outer surface of the second body portion 222b, May be provided. Accordingly, when the third gear portion 241 is rotated, the position of the third gear portion 241 is fixed, and the fourth gear portion 224 meshed with the third gear portion 241 is rotated so that the rotational force is transmitted to the first main portion 222a And is transmitted to the extended portion 223 connected thereto so that the moving portion 220 can be rotated integrally (see FIG. 9). The control unit 242 may control the driving unit 240 to control the rotation power and the rotation speed of the moving unit 220.

When the moving part 220 is rotated, the torch part 230 connected to the moving part 220 through the extended part 223 may be rotated. The torch 231 of the torch part 230 may be rotated by the flange 300, The pipe 310 can be cut while rotating around the pipe 310 of the pipe 310.

The supporting part 250 is positioned below the moving part 220 to guide and support the movement of the moving part 220.

The support portion 250 may be positioned below the second body portion 222b at a lower portion of the movement portion 220. The shaft portion 261 of the height adjustment portion 260 may pass through the support portion 250, And a portion of the penetrating shaft portion 261 may be connected to the fixing portion 210. The support portion 250 includes a first support portion 251 fixed to the shaft portion 261 of the height adjustment portion 260 and a second support portion 251 disposed between the first support portion 251 and the first body portion 222a. (252). The second support portion 252 may have a ring shape and the second body portion 222b of the movement portion 220 may be formed in the opening portion 253. In this case, The third gear portion 241 of the driving portion 240 engaged with the second main portion 222b of the shifting portion 220 and the fourth gear portion 224 of the second main portion 222b is positioned outside As shown in FIG. At this time, the second support portion 252 is formed to have a size corresponding to that of the first main body portion 222a, so that steps or the like caused by the size when viewed from the outside can be prevented.

The main body portion 222 of the moving portion 220 can be rotated by the first body portion 222a of the moving portion 220 in contact with the upper surface of the second body portion 222b, So that it can be stably rotated without being vertically moved. Since the second supporting portion 252 is formed in a ring shape and has a relatively small contact area with the first body portion 222a of the moving portion 220, the first body portion 222a and the second supporting portion 252, (252) can be minimized. However, the present invention is not limited to this, and even if the first body part 222a and the second support part 252 are spaced apart from each other, the first body part 222a of the moving part 220 may be separated from the height adjustment part 260 It can be realized to be sufficiently supported by the shaft portion 261. [

The height adjusting portion 260 is a member for adjusting the height of the fixing portion 210.

The height adjusting portion 260 includes a shaft portion 261 which penetrates through the support portion 250 and the moving portion 220 and is connected to the fixing portion 210. The height adjusting portion 260 adjusts the height of the shaft portion 261, 210 can be adjusted. When the handle 262 is rotated, the height of the shaft portion 261 is adjusted in such a manner that the screw connected to the handle is rotated. Accordingly, the height adjusting portion 260 adjusts the height of the shaft portion 261, Can be adjusted. Meanwhile, the height adjusting unit 260 may not necessarily be configured to adjust the height of the fixing unit 210 only. For example, the shaft portion 261 of the height adjusting portion 260 may be connected to adjust the height of the moving portion 220 and / or the supporting portion 250 as well as the fixing portion 210.

In this case, the height adjustment part 260 can cut the flange 300 located at various heights by adjusting the height of the fixing part 210, and in particular, the pipe 310 connected to the flange 300 is long or very large It can be very useful when the flange cutter 200 needs to be aligned with the position of the pipe 310 and the flange 300.

The support portion 270 is a member that is positioned below the height adjustment portion 260 and supports the height adjustment portion 260.

The pedestal portion 270 includes a pedestal plate 271 positioned at a lower portion of the height adjusting portion 260 so as to support the pedestal height adjusting portion 260 and a plurality of wheels 273 connected to a lower portion of the pedestal plate 271, And a wheel portion 272 having a plurality of wheels. Accordingly, the flange cutter 200 according to the present embodiment can be freely moved by the catching portion 270, thereby moving the pipe 310 or the flange cutter 200 to a position where the pipe 310 is installed It is possible to provide convenience when the flange 300 and the pipe 310 are cut and separated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be apparent that modifications and improvements can be made by those skilled in the art.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

110, 210: fixing portion 111:
116: first gear portion 117:
120, 220: moving part 121, 240: driving part
122: second gear portion 124: roller portion
125: tension portion 130, 230:
131, 231: torch 140: fitting part
222: main body portion 224: fourth gear portion
241: third gear portion 250: support portion
260: height adjuster 270:
300: flange 310: piping

Claims (22)

A fixing part surrounding the flange connected to the pipe to fix the flange;
A movable part movable along the periphery of the fixing part; And
A torch portion connected to the moving portion and at least a part of which is moved along the circumference of the pipe according to the movement of the moving portion, wherein the torch portion cuts the pipe;
Lt; / RTI >
And a second guide portion for guiding movement of the moving portion is formed on an outer surface of the fixing portion. The method according to claim 1,
The fixing unit includes:
A plurality of sub-fixed portions; And
An engaging member for engaging the sub-engaging portions;
Wherein the flange cutter comprises: The method according to claim 1,
And a first guide part for guiding movement of the moving part is provided on an outer surface of the fixing part. The method of claim 3,
Wherein the first guide portion is a first gear portion. 5. The method of claim 4,
The moving unit includes:
A driving unit; And
A second gear portion that is rotated by receiving the driving force of the driving portion and is engaged with the first gear portion;
Wherein the flange cutter comprises: 6. The method of claim 5,
A control unit for controlling power and rotational speed of the driving unit;
Wherein the flange cutter further comprises: delete The method according to claim 1,
And the second guide portion is a groove portion. 9. The method of claim 8,
Wherein the moving portion is provided with a roller portion that is rotated by friction while being in contact with the groove portion. The method according to claim 1,
A fitting portion coupled to an outer surface of the flange and interposed between the flange and the fixing portion;
Wherein the flange cutter further comprises: 11. The method of claim 10,
Wherein the fitting portions are coupled to an outer surface of the flange so as to be spaced apart from each other. The method according to claim 1,
The moving unit includes:
A tension unit for pulling the moving unit in a direction of the fixing unit;
Wherein the flange cutter further comprises: A fixing part for fixing the flange connected to the pipe to the upper part;
A movable part located at a lower portion of the fixing part and rotatable;
A torch portion connected to the moving portion and rotated at least partially along the circumference of the pipe in accordance with the rotation of the moving portion, wherein the torch portion cuts the pipe; And
And a shaft portion connected to the fixing portion through the moving portion, the height adjusting portion adjusting the height of the fixing portion;
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And the shaft portion of the height adjusting portion supports the moving portion so as to be rotatable. delete delete 14. The method of claim 13,
A supporting part located below the moving part;
Further comprising:
And the shaft portion of the height adjusting portion passes through the support portion to fix and support the support portion. 17. The method of claim 16,
Wherein the moving part includes a body part and an extension part extending from the body part and connected to the torch part. 18. The method of claim 17,
The support portion
A first supporting part fixed to the shaft part of the height adjusting part; And
A second support portion positioned between the first support portion and the moving portion and having an opening therein;
Wherein the flange cutter comprises: 19. The method of claim 18,
Wherein the main body part of the moving part comprises:
A first body portion positioned on the second support portion; And
A second body portion connected to the first body portion and positioned to be spaced apart from the first support portion inside the opening portion of the second support portion;
Wherein the flange cutter comprises: 20. The method of claim 19,
A driving unit having a third gear unit;
Further comprising:
And a fourth gear portion engaged with the third gear portion is provided on the outer surface of the second body portion. 14. The method of claim 13,
A pedestal portion positioned below the height adjusting portion and supporting the height adjusting portion;
Wherein the flange cutter further comprises: 22. The method of claim 21,
[0030]
A base plate positioned below the height adjusting unit; And
A wheel portion connected to a lower portion of the receiving plate and having a plurality of wheels;
Wherein the flange cutter further comprises:

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