KR20220158338A - CNC Pipe Coaster - Google Patents

Abstract

The present invention relates to a CNC pipe coaster, and more specifically, to a CNC pipe coaster comprising an expansion reel inserted into and fixed to the inner surface of a pipe, a heat dam for protecting a rotating shaft from heat generated during a cutting process, a contact rod for stably cutting an irregular circle, and a turning roll provided with an air spring. The CNC pipe coaster comprises a turning roll rail fastened to a frame, the turning roll connected to the turning roll rail, the expansion reel inserted into the inner surface of the pipe to fix the pipe, a fixing chuck frame for rotating the expansion reel, and a cutting unit main body horizontally moving on a cutting rail, and a cutting unit fastened to the cutting unit main body. The CNC pipe coaster further comprises the heat dam having fixed-side frames symmetrically disposed at both ends of the frame, connected to the rotating shaft to move horizontally, and including a cooling water pipe. The turning roll includes: a turning roll frame supporting a driving roller and a driven roller; a motor fastened to one side of the turning roll frame to operate the driving roller; and the air spring fastened between the turning roll frame and a rail slider. The CNC pipe coaster further comprises a moving rail on which the fixed chuck frame can move horizontally.

Description

CNC Pipe Coaster {CNC Pipe Coaster}

The present invention relates to a CNC pipe coaster, and more particularly, an expansion reel capable of fixing a thick plate having a thickness of 50 to 250 mm and weighing 20 tons or more to the inner surface of a molded pipe, and protecting the rotating shaft from heat generated during the cutting process It relates to a CNC pipe costa characterized in that it is provided with a heat dam for stably cutting irregular circles, and a turning roll equipped with a contact rod and an air spring.

In general, a pipe coaster is a pipe cutting equipment that cuts a pipe cap or branch pipe, and a CNC pipe coaster creates cutting data by grafting CNC technology, cutting cap and branch pipe, and beveling with simple operation of CNC. It is a device dedicated to cutting that does the job.

8 is a conceptual diagram (A) of manufacturing an elbow after cutting a pipe using a CNC pipe coaster, and FIG. 8B is a perspective view (B) showing a working state in which a cutting operation is possible when a CNC pipe coaster is applied.

If the pipe coster is classified as a method of rotating the pipe, it is classified into a method of rotating the pipe with a turning roll and a fixed chuck method in which a chuck is fixed to the pipe and the pipe is supported by an X-shaped support.

Since the rotation method rotates the pipe with the weight of the pipe, slip may occur, so precise cutting cannot be performed, but the pipe can be simply cut into a circle and beveled.

Since the fixed chuck method fixes the pipe using a chuck, sophisticated cutting and beveling operations are possible as shown in FIG. 8 .

The present applicant is the only company in Korea that has a 20,000 ton hydraulic press, and specializes in manufacturing shells for pressure vessels. In particular, it specializes in forming thick plates with a thickness of 50 to 250mm. Its main products are shells for heat exchangers, drums for storage containers, Reactors of chemical reactors, columns of vertical container bodies, and parts molded from building plant materials, which are finally manufactured and manufactured as LNG ships, cryogenic containers, reactors in chemical manufacturing, and reaction containers in oil refinery manufacturing.

In the present invention, after bending and molding a thick plate with a minimum weight of 15 tons, a length of 12 m, and a thickness of 50 to 250 mm into a pipe, a CNC pipe costa capable of performing cutting and beveling operations is disclosed.

A technology was required to precisely rotate the pipe weight of more than 20 tons on average, and since the length is more than 12 m, it is impossible to rotate the pipe considering the weight and length, so a structure capable of beveling both ends of the pipe is required. did

In addition, when manufacturing a pipe after bending and molding a thick plate with a thickness of 50 to 250 mm, it is common to satisfy the error range within 1% of the outer diameter because it cannot be molded into a perfect circle. In the case of manufacturing a pipe by molding a thick plate having an outer diameter of 750 cm and a thickness of 25 cm according to an embodiment, the error range of the circular outer diameter may be satisfied within 7.5 cm.

Therefore, in order to cut and bevel the pipe having the irregular outer diameter, it is necessary to develop an auxiliary device capable of cutting and beveling the pipe while maintaining a certain distance therebetween.

1. KR 10-1522721 B1, 'Chuck roll type pipe costa', Registration date: 2015.05.18. 2. KR 10-1146286 B1, 'Automatic pipe shape cutting and beveling device', Registration date: 2012.05.08. 3. KR 10-2171939 B1, 'Plasma cutter', registration date: 2020.10.26.

The present invention was invented to solve the above problems, and is a CNC pipe coaster capable of cutting and beveling pipes with a minimum weight of 15 tons, a length of 12 m and a thickness of 50 to 250 mm, which can be fixed to the inner surface of the pipe. Disclosed a CNC pipe coaster characterized by having an expansion reel, a heat dam to protect the rotating shaft from heat generated during the cutting process, a contact rod for stably cutting irregular circles, and a turning roll equipped with an air spring It is the object of the present invention to do.

In order to achieve the above object, the present invention provides a structure that can simultaneously use a fixing method and a rotating method in order to precisely rotate a pipe weighing 20 tons or more, and fixing the pipe while expanding and contracting inside the pipe by inserting it into the inner receiving portion of the pipe It is intended to disclose a CNC pipe coaster equipped with an expansion reel and a turning roll equipped with a motor.

In addition, since the present invention cannot rotate a pipe with a length of 12 m, in order to perform cutting and beveling operations on both ends of the pipe, a structure in which fixed chuck frames are arranged on both sides of the pipe and the fixed chuck frame can be moved horizontally It is intended to disclose a CNC pipe costa having a moving rail with a movable rail.

In addition, to disclose a CNC pipe coaster having a turning roll with an air spring in order to bring the turning roll supporting a pipe having an irregular outer diameter into close contact with the pipe.

Finally, to disclose a CNC pipe coaster equipped with a contact rod in contact with the pipe so that the plasma cutter is located at a regular interval from the outer circumferential surface of the pipe of irregular outer diameter, and a distance measurer that can replace the contact rod.

Due to the above solutions, the present invention has the following effects.

First, both ends of the pipe can be cut without rotating the pipe due to the expansion reel inserted into the inner circumferential surface of the pipe to fix the pipe.

Second, by providing the motor and the air spring of the turning roll, it is possible to stably rotate the heavy pipe, and it is possible to bring the turning roll into tight contact with the rugged pipe.

Third, by providing the holder and the multi-joint elbow of the plasma cutter, it is possible to prepare for the impact and impact of the plasma cutter.

Fourth, by providing a contact rod and a contact holder, the plasma cutting machine can be positioned at a set distance from the rugged outer circumferential surface of the pipe, enabling stable cutting and beveling operations.

1 is a perspective view of a conventional CNC pipe costa.
2 is a perspective view of a preferred embodiment of the CNC pipe costa of the present invention.
3 is a perspective view (A) and a front view (B) of the CNC pipe costa with the pipe 100 removed.
4 is a perspective view (A) and a side view (B) of the expansion reel 60.
5 is a perspective view (A) and a side view (B) of the turning roll 20.
6 is a configuration diagram of the air spring 25 of the turning roll 20.
7 is a perspective view (A), a front view (B) and a side view (C) of the cut-off portion 30 .
8 is a conceptual diagram of elbow production using a CNC pipe costa (A) and a perspective view (B) in which various cutting operations are possible.
9 is a photograph of an embodiment of the multi-joint elbow 35 and the holder 36 to prepare for the impact or impact of the plasma cutting machine 31.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description (all matters such as electric circuits and other required parts) are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In addition, since the size, color, and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to those shown in the drawings. In order to clearly express various parts and areas in the drawing, the color of each component is expressed as in the drawing, but it is obvious that the scope of the patent right includes all various colors.

The thickness or size of the components in the drawing is also shown enlarged for clarity of expression. The thickness of some parts and regions is exaggerated.

1 is a perspective view of a CNC pipe costa of a conventional fixed chuck method.

The CNC pipe coaster of FIG. 1 is applied when the pipe weight is less than 2 tons and the length is less than 6 m, the pipe is rotated by fixing the pipe with a fixed chuck, and the plasma cutter moves 4 to 6 axes while supporting the pipe with an X-shaped support. Alternatively, a rotating cutting main body is provided to cut or bevel one side of the pipe, and the pipe is rotated 180 degrees using a crane to cut the other side.

In the present invention, after bending and molding a thick plate with a minimum weight of 15 tons, a length of 12 m, and a thickness of 50 to 250 mm into a pipe, a CNC pipe costa capable of performing cutting and beveling operations is disclosed.

A typical pipe coster performs the same operation by holding the pipe in a fixed chuck, then cutting and beveling into various shapes on the opposite side of the fixed chuck, and then rotating the pipe.

However, since the pipe applied to the present invention requires cutting and beveling at both ends of a pipe with an average weight of 20 tons or more and a length of 12 m, there is a risk of safety accident in rotating the pipe, and Need to secure space.

Therefore, to disclose a CNC pipe costa capable of cutting and beveling a pipe having a thickness of 50 to 250 mm without rotating a heavy pipe.

The technology applied to the present invention is, first, to simultaneously apply a fixed chuck method and a rotation method in order to precisely rotate a pipe with a high weight.

The fixed chuck method is intended to disclose an expansion reel 60 that fixes the pipe by inserting it inside the pipe and expanding it inside the pipe, rather than fixing the outer diameter of the pipe. The structure of the expansion reel preferably has a structure of an expansion reel in an uncoiler that fixes and rotates the rolling roller.

When the expansion reel 60 extends the inner length of the pipe and removes the finished pipe after cutting, the fixed axis frame can be horizontally moved to provide convenience in the work. Equipped with a moving rail 19 it is desirable

Second, by providing a rotation motor to the existing turning roll, it is possible to reduce the rotational load of the expansion reel 60, and to increase the adhesion of the pipe having an irregular outer diameter, the rotation method is a turning roll frame instead of an X-shaped support. It is characterized by having an air spring 25 fastened between (21) and the rail sliding 27.

Third, in case of cutting both ends of the pipe without rotating the pipe, in order to remove thermal deformation of the rotating shaft 13 of the fixed chuck with the heat of the plasma cutting machine 61, it is connected to the rotating shaft 13 and horizontally It moves and is characterized by having a heat dam 70 equipped with a cooling water pipe.

Fourth, to disclose a CNC pipe coaster equipped with a contact rod in contact with the pipe so that the plasma cutter 31 can maintain a constant distance from the outer circumferential surface of the pipe of irregular outer diameter, and a distance measurer that can replace the contact rod.

2 is a perspective view of a preferred embodiment of the CNC pipe costa of the present invention, and FIG. 3 is a perspective view (A) and a front view (B) of the CNC pipe costa with the pipe 100 removed.

2 and 3, the present invention relates to a frame 1 fixed to the ground, a turning roll rail 2 fastened to the frame 1, and a horizontal movement connected to the turning roll rail 2 A turning roll 20 that rotates while supporting the pipe 100, an expansion reel 60 that is inserted into the inner circumferential surface of the pipe 100 to horizontally fix one end of the pipe, and a turning roll that rotates the expansion reel 60 A fixed chuck frame 10 having a rotary shaft 13, a cutting rail 51 installed at a distance horizontally spaced apart from the frame 1, and a cutting unit body connected to the cutting rail 51 and moving horizontally In the CNC pipe coaster having a (50) and a cutting part (30) coupled to the cutting part body (50), the fixed side frame (10) is symmetrically disposed at both ends of the frame (1), and the rotary shaft a heat dam 70 connected to (13) and horizontally moving, and the turning roll 20 includes a turning roll frame 21 supporting the driving roller 23 and the driven roller 24; a motor 22 fastened to one side of the turning roll frame 21 and operating the driving roller 23; Further comprising an air spring 25 fastened between the turning roll frame 21 and the rail sliding 27, and a movable rail 19 capable of horizontally moving the fixed chuck frame 10 To disclose a CNC pipe costa, characterized in that.

The fixed chuck frame preferably includes a moving part capable of moving the rotary shaft 13 horizontally or vertically, and includes a motor and a reducer connected to and driven by the rotary shaft 13 .

The cutting part body 50 has a power source and a controller of the plasma cutting machine 31, and preferably includes a member capable of moving the plasma cutting machine 31 in a horizontal or vertical direction.

Depending on the weight of the pipe, the fixed side frame 10 is symmetrically arranged at both ends of the frame 1, and the pipe can be fixed on both sides with the expansion reel 60 and the pipe can be rotated. have.

4 is a perspective view (A) and a side view (B) of the expansion reel 60, and FIG. 5 is a perspective view (A) and a side view (B) of the turning roll 20.

As shown in FIG. 4, one of the key technologies of the present invention is that both ends can be cut or beveled without moving the pipe.

In order to achieve the above object, the present invention is to disclose an expansion reel (60) for fixing a pipe in a state in which the pipe is inserted to a certain depth on the inner circumferential surface of the pipe.

The expansion reel 60 is a technology imitating the expansion drum of an uncoiler applied to a rolled sheet material, and a fixed plate 65 fastened and fixed to the outer circumferential surface of the rotating shaft 13; One of the fixed plate 65 An extension link 62 hinged with the side part and the auxiliary link 64; A cylinder 61 having an accommodating portion penetrating the rotation shaft 13 and having one side portion connected to an extension link 62; A contact drum 63 hingedly connected to the end of the extension link 62 and in contact with the inner circumferential surface of the pipe.

The expansion reel 60, as the cylinder 61 fastened to the outside of the fixed plate 65 expands or contracts in the horizontal direction, the expansion link 62 and the auxiliary link 64 are hinged to the contact drum 63 It has a structure that contracts or expands.

In the present invention, in order to bevel both ends in a state where the pipe is not moved, the expansion reel 60 must be inserted into the inner circumferential surface of the pipe to a depth greater than a certain depth.

Therefore, in order to achieve the above object, two technologies are disclosed.

First, a movable rail 19 is provided at the lower end of the fixed chuck frame 10 so that the fixed chuck frame 10 can be moved in a horizontal direction.

The fixed chuck frame 10 is positioned on the moving rail 19 so that the fixed chuck frame 10 moves horizontally, so that the fixed chuck frame 10 is moved outward when discharging the pipe seated on the turning roll 20. When cutting or beveling is performed with the pipe seated on the turning roll, the fixed chuck frame 10 is moved inward and inserted into the inner circumferential surface of the pipe, and then the expansion reel 60 is driven to By expanding, the contact drum 63 rotates the pipe while contacting the inner surface of the pipe.

Republic of Korea Patent Registration No. 10-1522721, 'Chuck Roll Type Pipe Costa' also discloses a moving part that moves the jaw and chuck vertically and horizontally in close contact with the inner circumferential surface of the pipe, but the technique of the jaw closely adhered to the inner circumferential surface of the pipe and the present invention There is a difference in components, functions, and effects from the expansion reel 60, which is inserted into the inner circumferential surface of the pipe and fixed while expanding, and although the moving part of the fixed chuck is disclosed, compared to the method using the moving rail 19 of the present invention The difference is in the absolute distance traveled.

Second, when cutting the pipe end near the fixed axis frame 10, when cutting a thick plate having a thickness of 50 to 250 mm, because the thermal energy generated by the plasma cutter 31 is exposed for a long time, the rotating shaft ( 13) may also generate thermal deformation.

Therefore, in order to prevent or suppress thermal deformation of the rotating shaft 13, the present invention intends to disclose the heat dam 70.

It is preferable that the heat dam 70 has an internal accommodating portion penetrating the rotating shaft and includes a sliding structure capable of horizontally moving with the cooling water pipe.

5 is a perspective view (A) and a side view (B) of the turning roll 20, and FIG. 6 is a configuration diagram of the air spring 25 of the turning roll 20.

As shown in Figs. 5 and 6, the turning roll 20 applied to the present invention includes a turning roll frame 21 supporting a driving roller 23 and a driven roller 24; a motor 22 fastened to one side of the turning roll frame 21 and operating the driving roller 23; and an air spring 25 fastened between the turning roll frame 21 and the rail sliding 27.

The turning roll 20 of the present invention has two characteristics.

First, when rotating a pipe weighing 20 tons or more and relying only on the rotation of the expansion reel 60, the load on the fixed chuck frame 10 is greatly reduced and durability is remarkably deteriorated.

Therefore, in order to smoothly rotate the heavy pipe and precisely control the rotation, it is characterized by having a motor that is driven in conjunction with the rotation of the expansion reel 60 rather than a simple turning roll of the support.

Second, when a thick plate with a thickness of 50 to 250 mm is bent and molded into a pipe, it has a bumpy circular cross section, not a round cross section. Therefore, in order to evenly distribute the weight of the pipe and smoothly rotate the turning roll, a technique is required to bring the turning roll into close contact with the pipe.

In order to achieve the above object, an air spring 25 fastened between the turning roll frame 21 and the rail sliding 27; is included.

The air spring 25 preferably has a structure capable of individual control or group control.

7 is a perspective view (A), a front view (B) and a side view (C) of the cut-off portion 30 .

The cutting part 30 includes a holder 36 supporting the plasma cutter 31; A multi-joint elbow 35 fastened to the holder 36 and bent at various angles; an LM guide 32 coupled to the multi-joint elbow 35; a link part 33 coupled to the LM guide 32; a rotary shaft 34 connected to the link part 33 and the cutting part body 50 and rotating; a contact holder 81 that is fastened to the link part 33 and moves vertically; It is located at the end of the contact holder 81 and contacts the pipe 82; characterized in that it comprises a.

The cutting unit 30 enables horizontal reciprocating movement in the X-axis direction and vertical reciprocating movement in the Z-axis direction of the plasma cutter 31 by the operation of the cutting unit body 50 and the configuration of the cutting rail 51.

The cutting unit body 50 includes a power source and a controller of the plasma cutting machine 31 .

The rotary shaft 34 is preferably moved back and forth by the Y-axis horizontal moving cylinder of the cutting unit body 50, and is a device that rotates around the axis of the rotary shaft.

The link part 33 of the cutting part 30 enables the plasma cutter 31 to be tilted based on the center line of the pipe center.

The LM guide 32 is a rail capable of vertically moving the plasma cutter 31 in the Z-axis direction, and has a structure capable of fine adjustment.

9 is a photograph of an embodiment of the multi-joint elbow 35 and the holder 36 to prepare for the impact or impact of the plasma cutting machine 31.

As shown in FIG. 9, a technique for preparing for collision or bending of the plasma cutter 31 in the setting process before cutting and beveling of the pipe coaster is required.

Therefore, in the present invention, a multi-section elbow 35 capable of responding to a collision or bending and a holder capable of being easily removed when a collision or bending of the plasma cutter 31 occurs are disclosed.

The holder 36 is a support for supporting the plasma cutter 31, but it is not a structure that is completely fastened, but it is preferable to have a structure that can be easily removed when a pipe collision occurs. In some cases, a spring and an elastic member are used. can also be added.

The multi-joint elbow 35 has a disk-shaped structure connected to a permanent magnet or an electromagnet, or has a disk-shaped clutch plate and a spring capable of pressing the clutch plate, so that when an external force is transmitted, bending occurs at various angles It is desirable to have a structure that can be

One of the main technologies of the present invention is to provide a contact bar 81 that allows the plasma cutter 31 to cut and bevel at a position set on the outer circumferential surface of the pipe while in contact with the pipe.

Normally, the pipe coster calculates the movement trajectory of the plasma cutter on the premise of a perfect pipe, but since the pipe to which the present invention is applied has a bumpy circular shape rather than a perfect circle, the movement trajectory of the plasma cutter 31 is also uneven It is preferable to perform a cutting or beveling operation while moving in the same shape.

Therefore, it is preferable that the contact bar 82 is configured in the form of a sphere or a roller that can move while being in contact with the pipe.

It is preferable to be connected to the contact bar 82 at the end of the contact holder 81, and it is preferable to have an actuator capable of moving downward or upward according to the shape of the pipe.

The contact holder 81 and the contact bar 82 may be replaced with a distance measuring device, or may be replaced with a non-contact or optical distance measuring device.

1: main frame, 2: turning roll rail,
10: fixed chuck frame, 11: controller, 12: outer diameter fixed chuck,
13: rotating shaft, 19: moving rail
20: turning roll, 21: turning roll frame, 22: motor,
23: drive roller, 24: driven roller, 25: air spring,
26: lower frame, 27: rail sliding,
30: cutting unit, 31: plasma cutter, 32: LM guide,
33: link part, 34: rotary shaft, 35: multi-joint elbow,
36: holder,
50: cutting part body, 51: cutting rail,
60: expansion reel, 61: cylinder, 62: expansion link,
63: contact drum, 64: auxiliary link, 65: fixed plate,
70: heat dam;
81: contact holder, 82: contact rod,
100: pipe.

Claims (3)

A frame (1) fixed to the ground, a turning roll rail (2) fastened to the frame (1), and a turning roll connected to the turning roll rail (2) to move horizontally and rotate while supporting the pipe (100) (20), an expansion reel (60) inserted into the inner circumferential surface of the pipe (100) to horizontally fix one end of the pipe, and a rotating shaft (13) for rotating the expansion reel (60). 10), a cutting rail 51 installed at a horizontally spaced distance from the frame 1, a cutting part body 50 connected to the cutting rail 51 and moving horizontally, and the cutting part body 50 and In the CNC pipe costa having the fastened cutting part 30,
Fixed-side frames 10 are symmetrically disposed at both ends of the frame 1,
A heat dam 70 connected to the rotating shaft 13 to move horizontally and having a cooling water pipe;
The turning roll 20,
a turning roll frame 21 supporting the drive roller 23 and the driven roller 24;
a motor 22 fastened to one side of the turning roll frame 21 and operating the driving roller 23;
An air spring 25 fastened between the turning roll frame 21 and the rail sliding 27; is further provided,
The CNC pipe coaster, characterized in that the fixed chuck frame (10) further comprises a moving rail (19) capable of horizontal movement.
According to claim 1,
The cutting part 30,
a holder 36 supporting the plasma cutter 31;
A multi-joint elbow 35 fastened to the holder 36 and bent at various angles;
an LM guide 32 coupled to the multi-joint elbow 35;
a link part 33 coupled to the LM guide 32;
a rotary shaft 34 connected to the link part 33 and the cutting part body 50 and rotating;
a contact holder 81 that is fastened to the link part 33 and moves vertically;
Located at the end of the contact holder 81, the contact rod 82 in contact with the pipe; characterized in that it has a CNC pipe coaster.
According to claim 2,
The contact holder 81 and the contact rod 82 are replaced by a distance measuring device, characterized in that the CNC pipe costa.

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