KR101723226B1

KR101723226B1 - Cutting Machine

Info

Publication number: KR101723226B1
Application number: KR1020160153661A
Authority: KR
Inventors: 조벽래; 김경섭
Original assignee: (주)케이텍플러스
Priority date: 2016-11-17
Filing date: 2016-11-17
Publication date: 2017-04-05

Abstract

The present invention relates to an on-site cutting processing apparatus which can be used in on-site repairing or recovering a component of a facility directly such as a plant, etc., comprising: a rotating shaft; a rotating arm wherein the rotating shaft penetrates and is coupled thereto; a clutch unit; a first gear wherein the clutch unit is coupled or is separated; a second gear which is installed to be able to rotate inside the rotating arm, and engages with the first gear such that the second gear is rotated or is not rotated around a second axis line; and a cutting unit formed in one end portion of the rotating arm and moving in a protruding direction along a second direction from one end portion of the rotating arm while the second gear is being rotated.

Description

Field Cutting Machine {Cutting Machine}

BACKGROUND OF THE INVENTION Field of the Invention [0002] The present invention relates to a field cutting apparatus capable of performing cutting work for repairing or restoring parts directly in a facility such as a power plant.

Equipment or equipment in use in a power plant may be unexpectedly damaged due to long-term operation in a state of continuous exposure to high-temperature, high-pressure and high-load environments, and in some cases, serious damage to equipment may occur.

The power industry, such as power, is a national infrastructure industry. The power plant should operate as planned without interruption. If the power plant is damaged due to damage, the power plant will be damaged. .

However, most parts of power generation facilities such as turbine casings and bearings are difficult to disassemble and assemble in a state where they are installed in the field, and it is impossible to move them to the processing plant in case of damage. Is often difficult or delayed.

In this case, it is necessary to repair or repair the damaged parts in such a way that they are processed directly at the site without moving the damaged parts. An example of a field cutting apparatus having such a purpose is Korean Patent No. 10-0973182 entitled " On-site workpiece processing apparatus ".

According to the present invention, there is provided a portable terminal comprising: a base fixed to a floor; a body slidably mounted on the base and slidable in the X-axis direction along the base; a fixing member fixed to both the left and right sides of the body; And a machining head which is coupled to the slide member and slides along the slide in the Z-axis direction.

However, the conventional field cutting apparatus including the above-mentioned registered patent has very limited shape and structure to be machined, so that there are not many parts that can be machined. In particular, it is not easy to cut the inner surface or the side surface of the large diameter part.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for repairing or repairing equipment in a plant, And to provide a field cutting and machining apparatus capable of performing such a machining operation.

A field cutting apparatus according to an embodiment of the present invention includes a rotary shaft rotatable about a first axis having an axial direction in a first direction; A rotary arm having a longitudinal direction formed in a second direction perpendicular to the first direction, the rotary shaft being inserted through the center and rotated together with the rotary shaft; A clutch portion movably disposed; The clutch portion is engaged or disengaged according to the movement of the clutch portion so that the clutch portion is disengaged and the clutch portion is disengaged so that the clutch portion is rotated in the first state when the rotation shaft rotates, A first gear that is in a second state that is not rotated despite the rotation of the rotating shaft; The first gear being rotatably mounted on a second shaft having an axial direction in the second direction inside the rotary arm, the first gear being meshed with the first gear so that, while the first gear is in the first state, A second gear that is not rotated about the second axis and is rotated about the second axis while the first gear is in the second state; And a cutting portion formed at one end of the rotary arm and being moved in a direction protruding from the one end of the rotary arm along the second direction while the second gear is rotated about the second axial line do.

In the field cutting apparatus according to the embodiment of the present invention, the cutting unit may include a first body disposed to be movable along a second direction within one end of the rotary arm, and a second body disposed on one side of the first body And a second body that is moved together when the first body is moved and a cutting edge can be formed at the end thereof.

In the field cutting apparatus according to the embodiment of the present invention, the second gear is formed so as to extend from the end of the second gear toward the one end of the rotary arm, and is rotated together with the rotation of the second gear. And a second gear thread formed inside the rotary arm, wherein the first body is disposed inside the rotary arm with the second gear thread portion threadedly engaged with the second gear thread portion, And can be moved in the second direction in accordance with the rotation.

In the field cutting apparatus according to the embodiment of the present invention, the rotary arm is mounted so as to be rotatable about the second axis while facing the second gear in the inside of the rotary arm, A third gear that is not rotated about the second axis while the first gear is in the first state and is rotated about the second axis while the first gear is in the second state; And a balance weight portion formed at the other end portion of the rotary arm and being moved in a direction protruding from the other end portion of the rotary arm along the second direction while the third gear is rotated about the second axial line .

In the field cutting apparatus according to an embodiment of the present invention, the balance weight unit may include a third body that is arranged to be movable along a second direction inside the other end of the rotary arm.

In the field cutting apparatus according to the embodiment of the present invention, the third gear is formed to extend from the end of the third gear toward the other end of the rotary arm, and is rotated together with the rotation of the third gear. And a third gear thread formed inside the rotary arm, wherein the third body is disposed inside the rotary arm with the third gear thread portion threadedly engaged with the third gear thread portion, And can be moved in the second direction in accordance with the rotation.

In the field cutting apparatus according to the embodiment of the present invention, the clutch unit may be coupled to the rotating shaft so that the rotating shaft passes therethrough, and may be arranged to be movable along the first direction on the rotating shaft.

In the field cutting apparatus according to the embodiment of the present invention, one of the clutch and the first gear may have a protrusion and the other may have a groove to which the protrusion can be coupled.

According to the present invention, parts required for repair or restoration can be directly repaired or restored on the spot without being separated and transferred to a separate processing site, so that the time required for repairing or repairing can be greatly shortened, Is greatly reduced.

Further, since the cutting portion can be selectively fixed in the rotary arm or can be moved in the direction protruding from the rotary arm, it is possible to easily cut the inner and outer surfaces of the component.

In addition, since the balance weight portion is moved together with the movement of the cutting portion, the weight balance of the rotary arm can be easily and stably maintained, and accurate machining can be stably performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a principal part of a field cutting and working apparatus according to an embodiment of the present invention;
FIG. 2 is a view of the rotary arm shown in FIG. 1 taken along the axial direction of the rotary shaft,
FIG. 3 is a view of the rotary arm shown in FIG. 1 in a direction perpendicular to the axial direction of the rotary shaft.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A field cutting apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view of the rotary arm shown in Fig. 1 viewed from the axial direction of the rotary shaft, and Fig. 3 is a view showing the rotation of the rotary shaft shown in Fig. 1 And the arm is viewed from a direction perpendicular to the axial direction of the rotating shaft.

The field cutting apparatus 1 according to the embodiment of the present invention includes a rotary shaft 10, a rotary arm 20, a clutch 30, a first gear 40, a second gear 50, , And a cutting portion (70).

The rotary shaft 10 may be supported by a supporting means such as a support stand 2 that can be installed at a facility site such as a power plant and rotated about a first axis A1 having an axial direction in the first direction. The rotary shaft 10 can be rotated by receiving a rotational force by a driving means such as a motor or the like.

The rotary arm 20 is formed in a longitudinal direction in a second direction perpendicular to the first direction. A rotary shaft 10 is coupled to a center of the rotary arm 20 so that relative rotation of the rotary arm 20 with respect to the rotary shaft 10 is not allowed. Therefore, the rotary arm 20 is also rotated together with the rotary shaft 10 when the rotary shaft 10 rotates.

The clutch portion 30 is arranged to be movable and can be engaged or disengaged with the first gear 40, which will be described later according to the movement. As an example of the arrangement structure of the clutch portion 30, the present embodiment is configured such that the clutch portion 30 is movable along the first direction on the rotary shaft 10 while being coupled to the rotary shaft 10 such that the rotary shaft 10 is passed therethrough The proposed structure is deployed. 1 shows a state in which the clutch portion 30 is separated from the first gear 40 and separated.

The clutch portion 30 is fixed so as not to rotate despite the rotation of the rotating shaft 10. [ As an example of the fixed structure, although not shown, it can be fixed so as not to be rotated by connecting the clutch portion 30 to a separate fixing member extending from the above-mentioned support 2, for example. It can be fixed not to rotate with various other structures. The clutch portion 30 may be coupled to the rotary shaft 10 by the first bearing 310 so that the rotation of the rotary shaft 10 is allowed.

In a state where the clutch unit 30 is not rotated, the clutch unit 30 can be moved along the first direction by manually moving the clutch unit 30. Or an electromagnetic clutch structure using an electromagnet together with the first gear 40, and may be moved in an electromagnetic clutch manner under the control of the operator. Or may be moved within the mechanical structure, for example by the action of fluid pressure. And may be moved in various other structures or ways.

The clutch portion 30 is not limited to the above-described arrangement structure. It is not necessary to be coupled to the rotary shaft 10 as in the illustrated example if the clutch 30 can be engaged or disengaged from the first gear 40 as the rotary shaft 10 rotates, So as to be moved by a separate moving means.

The first gear 40 is disposed between the rotary arm 20 and the clutch portion 30 in the illustrated example. The first gear 40 constitutes a bevel gear structure together with the second gear 50 or the third gear 60 to be described later. When the first gear 40 is viewed as a ring gear, the second gear 50 and the third gear 60 can be regarded as driving pinion gears.

The first gear 40 is coupled to the rotary shaft 10 such that the rotary shaft 10 passes therethrough. The first gear 40 is rotated integrally with the rotary shaft 10 in accordance with the rotation of the rotary shaft 10 in a state in which the clutch 30 is separated from the first gear 40 and separated. The state of rotation as described above will be defined as a 'first state'.

However, when the clutch unit 30 is moved and coupled to the first gear 40, the first gear 40 is not rotated by the engagement of the clutch unit 30 because the clutch unit 30 is fixed so as not to rotate . The state of not rotating as described above will be defined as a 'second state'. A second bearing 410 may be interposed between the first gear and the rotary shaft 10 such that the first gear 40 is in the second state, that is, the relative rotation of the rotary shaft 10 is permitted.

The clutch 30 and the first gear 40 may have protrusions on one and grooves on the other, and the protrusions are coupled to the grooves as the clutch 30 moves, And can be combined so as not to be allowed.

In the illustrated example, four pin-shaped protrusions 320 spaced apart at equal intervals along the circumferential direction are formed on one surface of the clutch portion 30, and the protrusion 320 is coupled to one surface of the first gear 40 And four grooves 420 are formed.

The second gear 50 is mounted so as to be rotatable about a second axis A2 having an axial direction in the second direction inside the rotary arm 20. [ The second gear 50 can function as a driving pinion gear as described above and is rotatably supported by the first gear 40 and rotatably supported by the first gear 40 And is converted into rotational force at the center of the second axis A2 to be transmitted.

Specifically, while the first gear 40 is in the first state, that is, while the first gear 40 is rotated about the first axis A1 together with the rotary shaft 10 and the rotary arm 20, The second gear 50 is not rotated about the second axis A2.

However, while the first gear 40 is in the second state, the rotary arm 20 is rotated relative to the first gear 40 so that the second gear 50 is rotated about the second axis A2. By rotating in this manner, the rotational force of the center of the first axis A1 is transmitted by the rotational force of the center of the second axis A2.

The rotational force at the center of the second axis A2 transmitted by the second gear 50 is transmitted to the cutting portion 70 so that the cutting portion 70 is moved along the second direction. As an example of a structure in which rotational force is transmitted to the cutting portion 70, the present embodiment is shown to be structured to be transmitted by the second gear thread portion 55.

Specifically, the second gear 50 may include a second gear thread 55, which is formed in the interior of the rotary arm 20. And extends from one end of the second gear 50 toward one end of the rotary arm 20 and is rotated together with the second gear 50 in accordance with the rotation of the second gear 50. The rotational force of the second gear thread portion 55 is transmitted to the cutting portion 70 so that the cutting portion 70 is moved.

The cutting portion 70 is formed at one end of the rotary arm 20 and is rotatably supported at one end of the rotary arm 20 while the second gear 50 is rotated in one direction about the second axial line A2. And can be moved in the direction of protruding along the direction.

The cutting portion 70 may include a first body 710 and a second body 720 as shown in FIG.

The first body 710 is accommodated in one end of the rotary arm 20 and is arranged to be movable along the second direction. 3, the first body 710 is formed so as to have a greater width than the other side (the right side with reference to FIG. 3) so as not to be separated from the rotary arm 20, .

The shape of the space for accommodating the first body 710 formed in the rotary arm 20 and the shape of the space for accommodating the first body 710 such that the first body 710 is stably moved only in the second direction in relation to the rotary arm 20, The outer shape of the body 710 may have a shape corresponding to each other.

The first body 710 is accommodated in one end portion of the rotary arm 20 and is engaged with the second gear thread portion 55 in a threaded manner. Accordingly, when the second gear thread portion 55 is rotated, the first body 710 having the second gear thread portion threadedly engaged therewith and movable in the rotary arm 20 moves along the second direction .

Specifically, when the second gear thread portion 55 is rotated in one direction, the first body 710 moves so that the cutting portion 70 is moved in a direction protruding from the one end of the rotary arm 20 along the second direction When the second gear thread portion 55 is rotated in the other direction, the first body 710 is moved so that the cutting portion 70 is moved in the opposite direction.

The second body 720 is formed on one side of the first body 710 and moves together with the movement of the first body 710. The second body 720 may be provided with a cutting edge 722 at the end thereof for cutting the part surface.

The cutting edge 722 may be replaceably or integrally formed in the second body 720. The second body 720 having the cutting edge 722 formed therein can be detachably mounted on the first body 710 by the fixing bolts 730 as shown in the illustrated example. Or the first body 710 and the second body 720 may be integrally formed.

In order to confirm the relative position between the first body 710 and the rotary arm 20 or to confirm the movement distance of the first body 710 and the movement speed of the first body 710, (711) may be formed. A scale 721 may be formed on the second body 720 to check the relative position between the first body 710 and the second body 720 or the degree of movement of the second body 720. [

The first body 710 and the second gear thread 55 may be separately mounted on the rotary arm 20 so that the first body 710 and the second gear thread 55 can be separated from each other, When the conditions for the degree of movement of the first body 710 are differently set, the first body 710 and the second gear thread 55 can be easily adjusted to the required machining conditions by replacing the first body 710 and the second gear thread 55 with another set suitable for the condition.

A process of operating the field machining apparatus 1 according to the present embodiment having the above structure according to the machining conditions will be schematically described as follows.

First, at the site in the power plant, parts necessary to be machined for repair or restoration or necessary parts of the parts are prepared to be exposed. A support base 2 can be installed around the parts, and the field cutting machine 1 can be installed on the support base 2 and can be stably supported during cutting.

For example, in the case where the inner surface of the cylindrical part is to be cut (first processing condition) in a state where the field cutting device 1 is installed, the cutting part 70 cuts the inner surface of the part with a predetermined inner diameter to be machined The first body 710 is moved to a predetermined position, and the clutch 30 is moved and positioned to be separated from the first gear 40.

When the rotary shaft 10 is rotated in this state, the first gear 40 is in the first state and the second gear 50 does not transmit the rotational force in the center of the second axis A2. Accordingly, the first body 710 is not moved along the second direction, but is fixed while cutting the inner surface of the component. At this time, a fixing bolt 210 for fixing the first body 710 may be coupled to the rotary arm 20 so that the first body 710 is firmly fixed in place.

In order to further process the inner surface of the part with another inner diameter, the first body 710 may be moved and fixed again, and then the cutting process may be performed in the above-described manner.

In the case where the side surface of the part is to be cut as another machining condition (second machining condition), the cutting edge 722 must be moved in the second direction during machining. In the case of the second machining condition, the first body 710 is not fixed by the fixing bolt 210, and the clutch part 30 is moved and engaged with the first gear 40. [

In this state, when the rotary shaft 10 and the rotary arm 20 are rotated, the first gear 40 is brought into the second state and the second gear 50 and the second gear thread 55 are engaged with the second axis A2, The rotational force of the center is transmitted to the first body 710. As a result, the first body 710 is continuously moved along the second direction and the cutting edge 722 of the second body 720 is also continuously moved together in the second direction so that the component side is cut from the viewpoint to the end point.

On the other hand, in the case where the cutting portion 70 is moved and fixed to a position in the first machining condition and / or is moved and fixed to another position for further machining, The balance of the weight of the rotary shaft 10 and the rotary arm 20 may not be balanced.

This vibration may be transmitted to the cutting edge, resulting in a problem that precise machining can not be performed. This problem may also be caused when the cutting portion 70 is continuously moved under the second machining condition.

Therefore, it is necessary to maintain the balance of the weight during the cutting process. To this end, the field cutting device 1 according to the present embodiment may further include a structure for maintaining the balance of the weight. As an example of this structure, the present embodiment shows an example of a structure including the third gear 60 and the balance weight portion 80.

Specifically, the third gear 60 is mounted so as to be rotatable about the second axis A2 while being disposed to face the second gear 50 in the inside of the rotary arm 20. As shown in Fig. The first gear 40 is meshed with the first gear 40 so that the first gear 40 is not rotated about the second axis A2 while the first gear 40 is in the first state, And is rotated about the two-axis line A2. The third gear 60 functions as a drive pinion gear in the same manner as the second gear 50.

The third gear 60 may include a third gear thread portion 65 for transmitting rotational force about the second axis A2 to the balance weight portion 80. [ The third gear thread portion 65 is formed inside the rotary arm 20 and is formed to extend from the end portion of the third gear 60 toward the other end portion of the rotary arm 20. [ Then, it is rotated together with the rotation of the third gear 60.

The balance weight portion 80 is formed at the other end portion of the rotary arm 20 so that the third gear 60 is rotated from the other end of the rotary arm 20 to the second end of the rotary arm 20 while the third gear 60 is rotated in one direction about the second axis A2. And is moved in a direction protruding along the direction.

The balance weight portion 80 can be formed and moved at the other end portion of the rotary arm 20 in the same structure as the structure in which the cutting portion 70 is moved in accordance with the rotation of the second gear thread portion 55, And a third body 810 disposed in the rotary arm 20 in the same structure as the first body 710.

The third body 810 is disposed inside the rotary arm 20 and is engaged with the third gear thread portion 65 in a threaded manner so that the first body 710 Is moved in accordance with the rotation of the third gear thread portion 65 in the same manner as the manner in which the third gear thread portion 65 is moved. The third body 810 may be fixed to the rotary arm 20 by a fixing bolt 220.

The balance weight portion 80 may include a fourth body 820 formed at one side of the third body 810 and the third and fourth bodies 810 and 820 may be integrally formed with the fixing bolt 830 (Not shown). However, the balance weight portion 80 does not necessarily have to include the third body 810 and the fourth body 820, and the weight balance portion 80 may be formed of a single body, The structure may be a combined structure.

The field machining apparatus 1 according to the present embodiment further includes the balance weight maintaining structure such that when the cutting portion 70 is moved along the second direction in the rotary arm 20, the balance weight portion 80 Are also moved along the second direction, whereby the balance of the weight can be maintained and the stable cutting process can proceed.

The embodiments according to the present invention have been described in detail above. It should be noted that the above-described embodiments illustrate preferred embodiments of the present invention and the present invention is not limited to the above-described embodiments. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

1: Field cutting device 2: Support
10: rotating shaft 20: rotating arm
210, 220: Fixing bolt 30: Clutch part
310: first bearing 320: projection
40: first gear 410: second bearing
420: groove 50: second gear
55: second gear thread portion 60: third gear
65: third gear thread portion 70: cutting portion
710: First body 711: Ruler
720: Second body 721: Ruler
722: cutting edge 730: fixing bolt
80: Balance weight portion 810: Third body
820: Fourth body 830: Fixing bolt

Claims

A rotary shaft (10) rotatable about a first axis (A1) having an axial direction in a first direction;
A rotary arm 20 having a longitudinal direction formed in a second direction perpendicular to the first direction, a rotary shaft 10 coupled to the rotary shaft 10 at the center and rotated together with the rotary shaft 10;
A clutch portion (30) arranged to be movable;
The clutch unit 30 is engaged or disengaged according to the movement of the clutch unit 30 and the clutch unit 30 is disengaged so that the rotating shaft 10 is rotated, A first gear 40 that is in a first state rotated together or in a second state in which the clutch portion 30 is engaged and thereby is not rotated despite the rotation of the rotary shaft 10;
The first gear 40 is rotatably mounted on the second axis A2 having an axial direction in the second direction within the rotary arm 20. The first gear 40 is meshed with the first gear 40, A second gear (50) that is not rotated about a second axis (A2) during the first state and is rotated about a second axis (A2) while the first gear (40) is in the second state; And
The rotation of the second gear 50 which is formed at one end of the rotary arm 20 and is rotated around the second axis line A2 while the second gear 50 is rotated about the second axis line A2 And a cutting part (70) which is moved in a direction projecting from the one end of the rotary arm (20) along the second direction.

The cutting tool according to claim 1, wherein the cutting portion (70)
A first body 710 disposed at one end of the rotary arm 20 so as to be movable along the second direction and a second body 710 formed at one side of the first body 710, And a second body (720) which is moved together and on which the cutting edge (722) can be formed.

The method of claim 2,
The second gear 50 is formed to extend from the end of the second gear 50 toward one end of the rotary arm 20 and is rotatably supported by the rotary arm 20 so as to be rotated together with the rotation of the second gear 50. [ And a second gear thread portion 55 formed inside the first gear thread portion 55,
The first body 710 is disposed inside the rotary arm 20 with the second gear thread portion 55 threadedly engaged therewith so that the second gear thread portion 55 is engaged with the second gear thread portion 55 in the second direction Is moved to the second position.

The method according to claim 1,
The first gear 40 and the second gear 40 are rotatably mounted on the inside of the rotary arm 20 so as to be rotatable about the second axis A2 while facing the second gear 50, Is not rotated around the second axis (A2) while the first gear (40) is in the first state and the third gear (60) is rotated about the second axis ); And
Is formed at the other end of the rotary arm 20 and is extended from the other end of the rotary arm 20 along the second direction while the third gear 60 is rotated about the second axis A2 And a balance weight portion (80) which is moved.

The balance weight unit according to claim 4, wherein the balance weight unit (80)
And a third body (810) arranged to be movable along a second direction inside the other end of the rotary arm (20).

The method of claim 5,
The third gear 60 is formed to extend from the end of the third gear 60 toward the other end of the rotary arm 20 and is rotatably supported by the rotary arm 20 so as to be rotated together with the rotation of the third gear 60. [ And a third gear thread portion (65) formed inside the first gear thread portion
The third body 810 is disposed inside the rotary arm 20 with the third gear thread portion 65 threadedly engaged therewith so that the third gear thread portion 65 is engaged with the third gear thread portion 65 in the second direction Is moved to the second position.

The method according to claim 1,
Wherein the clutch unit (30) is coupled to the rotary shaft (10) such that the rotary shaft (10) penetrates the rotary shaft (10) and is arranged to be movable along the first direction on the rotary shaft (10).

The method of claim 7,
Wherein a protrusion (320) is formed on one of the clutch portion (30) and the first gear (40), and a groove (420) Cutting device.