KR101853556B1 - Pipe cutting machine - Google Patents

Abstract

[0001] The present invention relates to a pipe cutting apparatus, and more particularly, to a pipe cutting apparatus that adjusts the length of advancement of a torch in accordance with the shape and condition of a pipe cutting process, So that the initial gap between the pipes can be continuously maintained.
According to the present invention, a bed serving as a base of the apparatus constitution; A main shaft disposed on one side of the bed in the longitudinal direction and rotating while supporting a pipe as an object to be cut; A reciprocating table on which a torch head equipped with a torch, which is a cutting tool of the pipe, A positioning device for adjusting an advance length of the torch so that an initial gap between the torch and the pipe is kept constant while the torch head is additionally mounted on the torch head; And a roundness meter for measuring whether or not the pipe is full-circle, further installed on the bed, and actively controlling the operation of the positioning device by the drive controller based on the measurement value .

Description

[0001] PIPE CUTTING MACHINE [0002]

[0001] The present invention relates to a pipe cutting apparatus, and more particularly, to a pipe cutting apparatus that adjusts the length of advancement of a torch in accordance with the shape and condition of a pipe cutting process, So that the initial gap between the pipes can be continuously maintained.

Plant means an integrated facility that produces a planned output through a combined process. It means production facilities or factories such as industrial machinery, machine tools and telecommunication machinery as well as industrial infrastructure such as power generation, fresh water, oil refining, petrochemical, crude oil and gas processing, offshore facilities and environmental facilities.

The integrated facility refers to an aggregate of materials, parts, units, subassemblies, instruments, containers, piping, and structures that are combined in an organic and systematic manner so as to have independent functions.

In this regard, the plant industry can create high added value because it requires a variety of knowledge services as well as advanced design and manufacturing technologies. In addition, it has a large effect on the bar industry that can generate profit in various fields such as design and engineering, consulting, equipment manufacturing, construction and commissioning, and contributes to the advancement of industrial structure.

Since the plant construction for constructing the facilities of this plant industry is rarely produced by the same design even if similar products are produced due to the nature of the industrial system which is produced according to each demand, The geographical and social environment of the place where it is located, and the climate, geographical conditions and social conditions should be fully reflected in the system design. Therefore, it is almost impossible to apply the same plant to other regions with different natural, geographical and social conditions.

On the other hand, the most commonly used materials for the above-mentioned plant construction are iron and steel, and steel pipes or pipes having a circular cross section or a rectangular cross section are mainly used. These pipes can be used as pure structure at the same time as piping type (piping type), easy to make and easy to modify because they are installed quickly.

In particular, off-shore plant construction has advantages such as less wind, wave and ocean currents, and buoyancy. However, depending on the type and application, the structure of the pipe is different, and it must be processed according to the contact method and requirements of the contact between the pipe and the pipe or the contact between the pipe and the other structure.

As described above, since the shape of the pipe machining (cutting) surface must be different according to the contact method and requirements of the contact portion, a high cutting technique is required, which requires more precise machining.

A pipe cutting apparatus for this purpose supports a pipe with a chuck, and a torch, which is a cutting tool, cuts a predetermined portion of the pipe. Laser, plasma, gas, water jet, or the like is used for the cutting method. It is important to precisely process the gap between the torch and the pipe to be the workpiece.

Based on this technical idea, Korean Patent No. 10-1460224 discloses a pipe cutter capable of cutting corrugated or circular cuts of a pipe body, stably maintaining the cutting quality of the pipe, and improving productivity. A machining apparatus has been disclosed.

FIG. 1 is a block diagram of a conventional tube cutting apparatus. In the conventional tube cutting apparatus, as shown in FIG. 1, a plasma torch 910 is disposed at a center of the tube p, (920) provided on the other side of the angle adjusting means (920) and rotated about the center of the plasma torch (910) to place the plasma torch (910) The plasma torch 910 includes a rotating unit 930 for adjusting the angle of the plasma and a rotating unit 930 connected to the rotating unit 930. The rotating unit 930 is moved up and down in the longitudinal direction of the housing, And elevating means (not shown) for adjusting the elevating height.

The angle adjusting means 920 includes a link body 921 incorporating a drive unit (electric motor) so as to adjust the angle of the plasma torch 910 to a downward position; A first horizontal link 922 having one end connected to the upper end of the plasma torch 910 and disposed horizontally; A second horizontal link 923 disposed parallel to the lower side of the first horizontal link 922 and longer than the first horizontal link 922 and having one end connected to the lower end of the plasma torch 910, Wow; A first vertical link 924 having one end vertically connected to the other end of the first horizontal link 922 and the other end connected to the front side of the link body 921; And one end of the second vertical link 923 is connected to the other side end of the second horizontal link 923 and the other end of the second vertical link 923 is connected to the rear side of the link body 921, And a link device 926 including a link device 925.

The plasma torch 910 for cutting the tubular body p can be raised or lowered and moved forward or backward or the center of the tubular body p can be moved along the axis The plasma torch 910 can be rotated left and right or the angle of the plasma torch 910 can be adjusted so that the tubular body p can be subjected to a waveform or circular cutting as well as a simple cutting operation.

In addition, since it is possible to stably maintain the cutting quality of the tube p regardless of the skill of the operator and to improve the productivity, it is possible to produce a wider variety of products, .

However, if the gap between the plasma torch 910 and the tubular body p is greater than a specific distance, complete cutting is not performed and the cut surface becomes rough. Particularly, when the inclination of the plasma torch 910 is broken by more than a predetermined angle, there is a problem that the torch body and the tube p collide with each other. As a result, detailed machining becomes impossible, Resulting in damage to the apparatus due to the use of the apparatus.

Korean Registered Patent No. 10-1460224 (Registration date: April 04, 2014.)

It is an object of the present invention to provide a positioning device for automatically adjusting the advance length of a torch in accordance with an angle of a tilt of a torch and a roundness of a pipe, So that the collision between the torch head and the pipe can be prevented.

Further, it is possible to further maintain the initial gap between the torch and the pipe by adjusting the advance length of the torch corresponding to the surface curvature of the pipe whose roundness is not ensured by further comprising a roundness measuring device for continuously measuring the roundness of the pipe to be cut And a pipe cutting device for cutting the pipe.

According to an aspect of the present invention, there is provided a bed comprising: A main shaft disposed on one side of the bed in the longitudinal direction and rotating while supporting a pipe as an object to be cut; A reciprocating table on which a torch head equipped with a torch, which is a cutting tool of the pipe, A positioning device for adjusting an advance length of the torch so that an initial gap between the torch and the pipe is kept constant while the torch head is additionally mounted on the torch head; And a roundness meter for measuring whether the pipe is full-circle, further installed on the bed, and for actively controlling the operation of the positioning device by the drive controller based on the measured value.

The reciprocating unit may include a guide unit for mounting the torch head and moving the torch head at one end thereof and adjusting the angle of the torch so that the angle of the torch is adjusted before and after along the longitudinal direction of the pipe Wherein the torch head is mounted on one side of the carriage and is capable of being moved up and down by a hydraulic cylinder in a state of being mounted on one side of the carriage, And a tilting link for adjusting the angle of the secondary tilting angle in which the angle of the torch is adjusted to the left and right along the width direction of the pipe by adjusting the angle of the mounting table between the mounting tiles, The angle of the tilting link and the mounting table is adjusted so that the primary inclining angle of the torch attached to the mounting table is adjusted The link arm is hinged to the lock.

In addition, the positioning device may include a lift block integrally assembled with the torch so as to be moved upward and downward in the upper portion of the mounting table for adjusting the advancing length of the torch, A lead screw extending from the drive shaft of the servo motor and rotated simultaneously by the drive shaft when the servo motor is driven; A screw nut integrally coupled to one end of the lifting block and assembled to the leadscrew so that the lifting block is moved up and down by being moved along a screw thread when the servomotor is driven; And a plurality of vertically guided blocks that guide the upward and downward movement of the lifting block in a state of passing through the lifting block A shaft fixing member disposed on an upper side of the mounting table so as to support and fix the lead screw and the guide shaft; and a secondary settling portion of the torch according to the operation of the tilting link, A first balance sensor that senses an angle and automatically moves up and down the elevation block by driving the servo motor and driving the servo motor by the drive control unit and the second balance sensor by the third bracket, And a first position sensor and a second position sensor for detecting the movement position of the screw nut, respectively, in a state that the first position sensor and the second position sensor are disposed on the upper and lower sides at predetermined intervals, respectively.

The circularity measuring device may further include a supporter which is disposed at a predetermined position on the upper end of the bed and which is erected in such a manner that the horizontally rotatable member is horizontally rotatable in both left and right directions, And a control unit for controlling the driving of the servo motor by the drive control unit and the phase of the lift block by driving the servomotor by measuring a flow displacement of the detection unit, And a second balance sensor for automatically performing the downward movement.

As can be clearly understood from the above description, the pipe cutting apparatus of the present invention is capable of sufficiently adjusting the angle of the first and second downlays relative to the conventional apparatus, And a variety of cutting operations, such as the possibility of linear cutting of pipes and sections, can be achieved.

Further, since the length of the advancement of the torch can be adjusted by using the positioning device and the roundness meter, when the height of the torch head is increased by the advancing length of the torch so that the angle of the torch is over a certain range, It is possible to simultaneously solve the problem of difficulty in finishing the cutting process and the one point cutting according to the continuous maintenance of the initial gap between the torch and the pipe, It is effective.

At the same time, it is necessary to change the shape of the pipe according to the contact method and requirements of the contact portion between the pipe and the pipe or between the pipe and the other structure in order to achieve various effects as in the past. Therefore, And / or a pipe cutting process with sufficient cutting quality to be used for various pipes used as a pure structure, it is possible to expect the effect of import substitution through localization of a pipe cutting device, which has been largely dependent on imports, It is a very useful invention that can greatly contribute to the development and activation of the plant industry and plant construction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a conventional tube cutting and processing apparatus according to the prior art;
FIGS. 2A and 2B are a front view and a side view showing the entire structure of a pipe cutting apparatus according to the present invention;
3 is a perspective view showing a configuration of a torch head and a positioning device in a pipe cutting apparatus according to the present invention.
4 is a perspective view showing the configuration of the roundness measuring apparatus in the pipe cutting apparatus according to the present invention.
5 is an enlarged view of an embodiment showing a working relationship of the torch head in the pipe cutting apparatus according to the present invention.
6 (a) and 6 (b) are enlarged views showing the configuration and operating relationship of the positioning device in the pipe cutting apparatus according to the present invention.
7 (a) and 7 (b) are views showing an operating relationship of the roundness measuring apparatus in the pipe cutting apparatus according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. First, in adding reference numerals to the constituents of the drawings, it is to be noted that the same constituents are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 3 is a perspective view showing a configuration of a torch head and a positioning device in a pipe cutting apparatus according to the present invention. FIG. FIG. 4 is a perspective view showing a configuration of the circularity measuring apparatus in the pipe cutting apparatus according to the present invention, FIG. 5 is an enlarged view of an embodiment showing the operation of the torch head in the pipe cutting apparatus according to the present invention, 6 (a) and 6 (b) are enlarged views showing the configuration and operating relationship of the positioning device in the pipe cutting apparatus according to the present invention, and Figs. 7 (a) Fig. 8 is a view showing an operating relationship of the roundness measuring apparatus.

As shown in FIGS. 2A and 2B, a pipe cutting apparatus A according to the present invention includes a bed 1 serving as a base of the apparatus structure, A main shaft 2 which rotates while supporting a pipe (p / tube) which is an object to be processed, and a cutting tool A reciprocating table 3 in which a torch head 31 equipped with a torch t is connected to the torch head 31; a positioning device 4 for keeping the initial gap between the pipe p and the pipe p constant and maintaining the gap between the pipe p and the pipe p; And a roundness meter 5 for actively controlling the operation of the positioning device 4 based on the measured values .

Here, the operation of the positioning device 4 as described above is based on a preset program execution of a drive control unit (not shown) provided with the circularity measurement value of the pipe (p) by the roundness measuring device 5.

The bed 1 is a large table formed in a long direction in one direction in consideration of the length (size) of the pipe p pierced by the main shaft 2 so that the pipe p is supported and supported stably A plurality of necessary pedestals 11 are arranged at regular intervals.

In addition, a no-load rotating roll 111 for smooth rotation support of the pipe p axially rotating at RPM (number of revolutions per minute) determined by the main shaft 2 is provided at each upper portion of the pedestal 11 .

The headstock 2 is a means for enabling external cylindrical cutting of the pipe p using the torch t and is used for rotating the pipe p while tightly supporting the pipe p A chuck 21 is mounted.

The carriage 3 is a means for adjusting the primary angle of inclination of the torch (t) and for shifting the position of the torch (t) together with the co-mounting of the torch head 31 to which the torch 1), and guiding means (not shown) for mounting and moving the torch head 31 upward and downward is coupled to one end of the torch head 31 facing the pipe p (Not shown) for adjusting the angle of the primary inclining angle so that the angle of the torch t is adjusted in the longitudinal direction of the pipe p.

The torch head 31 is for positioning and adjusting the angle of the torch t for cutting the pipe p and the torch head 31 is provided on the side of the torch head 3 as shown in Fig. A mounting table 312 to which the torch t is connected in cooperation with a platform 311 which is movable up and down by a hydraulic cylinder 300 mounted on one side of the platform 311, A tilting link 313 for adjusting the angle of secondary inclination of the torch (t) is adjusted to the left and right along the width direction of the pipe (p) by adjusting the angle of the mounting table (312) .

Here, the hydraulic cylinder 300 is an actuator that performs a mechanical operation using fluid energy. If the hydraulic cylinder 300 can exhibit the same operational relationship as a pneumatic cylinder using compressed air other than hydraulic pressure, It is possible to do otherwise.

The tilting link 311 is connected to the tilting link 312 so that the tilting link 312 and the mounting table 313 are angled when the tilting link 312 is driven, The link arm 311-1 is hinged to adjust the primary inclination angle of the torch t.

The positioning device 4 is used for maintaining the gap between the torch t and the pipe p in accordance with the advancement length of the torch t and for preventing the collision between the torch head 31 and the pipe p As shown in Figs. 3 and 6 (a), the upper and lower portions of the mounting table 313 are integrally assembled to the torch t to adjust the advance length of the torch t, A servo motor 43 driven to rotate when power is applied in a state of being coupled to one end of the mounting bracket 313 by the first bracket 42-1, A lead screw 44 which simultaneously rotates by a drive shaft when the servomotor 43 is driven in a state of being extended from a drive shaft of the servo motor 43 and a lead screw 44 which is rotated by the second bracket 42-2, (43) is integrally coupled to one end of the lead screw (41) and assembled with the lead screw (44) A screw nut 45 vertically moved from the upper end of the mounting table 313 to move up and down the upper surface of the lifting block 41, 41 and a shaft fixing member 31 which is spaced apart from the mounting base 313 for supporting and fixing the lead screw 44 and the guide shaft 46, (T) according to operation of the tilting link (312) in a state where the tilting link (312) is provided on the shaft fixing table (47) A first balance sensor 48 for automatically moving the lifting block 41 upward and downward through the lifting block 41 and a second balancing sensor 48 for lifting the lifting block 41 by a predetermined distance at one side of the lead screw 44 by the third bracket 42-3 The screw nut 45 is moved in a state where it is positioned on the upper and lower sides, A first position sensor 49-1 and a second position sensor 49-2 for sensing the position of the object.

The circularity measuring instrument 5 is a means for the pipe p to measure the circularity and to control the operation of the positioning device 4 therethrough. As shown in Figs. 4 and 7 (a) A support part 51 disposed at a predetermined position on the upper end of the bed 1 and standing upright in a state rotatable horizontally in both left and right directions, A rod-shaped detector 52 hinged to the upper side of the supporter 51 so as to be able to move upward and downward; and a controller 52 for measuring the displacement of the detector 52, and a second balance sensor 53 for automatically driving the servo motor 43 to adjust the advance length of the lifting block 41 and moving the lifting block 41 upward and downward.

The first and second balance sensors 48 and 53 are provided with a gyro sensor (Gyro) for measuring a change in the azimuth of the object by using a property of always keeping the constant direction initially set with high accuracy regardless of the rotation of the earth Sensor). However, the present invention is not limited to this, and it is possible that the configuration may be changed as long as it can exhibit the same operational relationship.

Hereinafter, the operation of the pipe cutter A according to the present invention will be described in detail.

As mentioned above, the most commonly used pipes in plant construction can be used as pure structures at the same time as piping. They are easy to make and easy to modify because they are fast to install, but they have different structures depending on their types and uses. Or the contact method and requirements of the portion where the pipe and the other structure are in contact with each other, a high-level cutting technique is required. For this reason, more precise machining is required.

Particularly, in the case of a tube pipe dedicated to an offshore plant, when the left and right tilting angles of the torch are in the range of ± 75 ° or more, even if the torch and the pipe do not contact each other, And it is highly likely that the manufacturing defects are caused, which leads to a problem of an increase in production costs.

Furthermore, the rear pipe is a product manufactured by bending an iron plate rather than a standard pipe, and it is difficult to ensure the out of roundness, so that the torch (t) and the pipe it is not easy to maintain the initial clearance between the pores (p). These problems can be solved simply by using the pipe cutting apparatus A of the present invention.

More specifically, as shown in Figs. 2A and 2B, the pipe p to be cut is rotated in a state of being bitten by the chuck 21 of the main shaft 2, Is cut into a desired shape using the torch (t) mounted on the mounting table (313) of the torch head (31).

At this time, to rotate the link arm 311-1 of the torch head 31 by operating the rotating means incorporated in the reciprocating table 3 to change the shape and condition of cutting the pipe p, And adjusts the primary inclining angle so that the angle of the torch (t) is adjusted before and after the rotation.

In addition, as shown in FIG. 5, the pipe p cutting operation is performed in a secondary down-angle adjustment state in which the angle of the torch t is adjusted to the left and right by the operation of the tilting link 312 In this case, the first balance sensor 48 provided on the shaft fixing table 47 of the positioning device 4 senses the first and second reclining angles of the torch t, The drive control device drives the servo motor 43 of the positioning device 4 on the basis of a predetermined program so that the servo motor 43 is rotated by the servo motor 43 as shown in Fig. The screw nut 45 assembled to the lead screw 44 is moved downward along the screw thread of the lead screw 44 to thereby move the torch 44 integrally with the elevating block 41 and the elevating block 41 t of the torch head 31 are lowered together with the lower end of the mounting table 313 of the torch head 31 Depending on the length adjustment operation of an entrance, its advanced length as it is possible to increase the gap between the torch head 31 with the pipe (p) is also made possible to avoid collision between each other.

In the case of the pipe p cutting operation in which the roundness is not guaranteed, the drive control device actively operates the positioning device 4 on the basis of the roundness measurement value of the pipe p by the roundness measuring device 5 So that the initial gap between the torch (t) and the pipe (p) can be maintained constantly.

More specifically, as shown in FIG. 7 (a), the detection part 52 of the roundness measuring instrument 5, which flows upward and downward in accordance with the surface curvature of the pipe p in a state in which its tip is in close contact with the upper surface of the pipe p, The second balance sensor 53 of the roundness measuring device 5 continuously measures the flow displacement and based on the measured value, the drive control device controls the servo motor (not shown) of the positioning device 4 43 so that the screw nut 45 is moved upward and downward along the screw thread of the lead screw 44 rotated by the servo motor 43 to move the lift block 41, And the length of the torch (t) integrated with the elevating block 41 is made to advance or retreat to the lower side of the mounting table 313 so that the initial gap between the torch (t) and the pipe (p) So that the same position is cut with the same quality One point cutting is possible.

7 (b), the support portion 51 of the roundness measuring device 5 is rotated left and right so that interference between the chuck 21 and the detection portion 52 is prevented , It is possible to increase the cutting range to a position as close as possible to the end of the pipe (p), thereby making it possible to reduce the production cost by increasing the material utilization.

The length of the advancement of the torch (t) is automatically adjusted in accordance with the irregular roundness of the pipe (p) and the adjustment of the angle of the first and second downers of the torch head (31) The effect of preventing the collision between the torch head 31 and the pipe p as well as the initial gap between the torch t and the pipe p can be maintained.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the claims should be construed as being included in the scope of the present invention.

A: pipe cutting device, t: torch, 1: bed
2: main shaft, 3: carriage, 4: positioning device
5: roundness measuring instrument, 11: pedestal, 21: chuck
31: torch head, 41: lift block, 42-1: first bracket
42-2: second bracket, 42-3: third bracket, 43: servo motor
44: lead screw, 45: screw nut, 46: guide shaft
47: shaft holder, 48: first balance sensor, 49-1: first position sensor
49-2: second position sensor, 51: support section, 52: detection section
53: second balance sensor, 111: rotating roll, 311:
311-1: Link arm, 312: Tilting link, 313: Mounting base

Claims (4)

A bed serving as the base of the device configuration;
A main shaft disposed on one side of the bed in the longitudinal direction and rotating while supporting a pipe as an object to be cut;
A reciprocating table on which a torch head equipped with a torch, which is a cutting tool of the pipe,
A positioning device for adjusting an advance length of the torch so that an initial gap between the torch and the pipe is kept constant while the torch head is additionally mounted on the torch head; And
And a roundness meter for measuring whether the pipe is full-length, further installed on the bed, and actively controlling the operation of the positioning device by the drive controller based on the measured value,
The reciprocating unit includes guide means for mounting the torch head and moving the torch head at one side end thereof and a rotation for adjusting the primary downward angle in which the angle of the torch is adjusted forward and backward along the longitudinal direction of the pipe Means are built-in,
Wherein the torch head comprises: a platform that is movable upward and downward by a hydraulic cylinder in a state of being mounted on one side of the shuttle; a mounting table on which the torch is mounted in association with the mounting table; And a tilting link for adjusting the angle of the secondary downward angle in which the angle of the torch is adjusted to the left and right along the width direction of the pipe,
The tilting link and the tilting link are connected to each other so that the angle of the tilting link and the mounting table is adjusted when the tilting link is driven to adjust the primary tilting angle of the torch attached to the mounting table, Is hinged,
The positioning device includes a lifting block integrally assembled with the torch, the lifting block being moved upward and downward in the upper portion of the mounting table for adjusting the advancing length of the torch,
A servomotor rotatably driven at the time of power application in a state of being coupled to one end of the mount by a first bracket;
A lead screw extending from a drive shaft of the servo motor and rotated simultaneously by the drive shaft when the servo motor is driven,
A screw nut integrally coupled to one end portion of the elevating block by the second bracket and being moved along the screw thread when the servomotor is driven in a state that the elevating block is assembled to the lead screw, Wow,
A plurality of guide shafts vertically provided from the upper end of the mounting table and guiding the upward and downward movement of the elevating block in a state of passing through the elevating block,
A shaft fixing table disposed on the mounting table for holding and fixing the lead screw and the guide shaft,
Wherein the tilting link operation is provided on the shaft fixing table to detect the angle of the tilting of the torch so that the driving of the servomotor by the driving control unit and the upward and downward movement of the elevating block by driving the servomotor A first balance sensor to be automatically performed,
And a first position sensor and a second position sensor for detecting a movement position of the screw nut in a state where the first and second brackets are disposed on upper and lower sides of the lead screw at predetermined intervals at one side of the lead screw, Pipe cutting device.
delete delete The method according to claim 1,
Wherein the roundness measuring device includes a support portion that is disposed at a predetermined position on the upper end of the bed and is erected in a state in which it is horizontally rotatable in both left and right directions,
A bar-shaped detection unit hinged to the upper side of the supporter so as to be able to move upward and downward along a surface bending state in contact with the upper surface of the pipe,
And a second balance sensor for measuring the flow displacement of the detection unit and automatically moving the servo motor by the drive control unit and moving the up / down block by driving the servo motor. Pipe cutting device.

Images