KR102325138B1 - Pipe cutting device - Google Patents

Abstract

Disclosed is a pipe cutting apparatus. The pipe cutting apparatus of the present invention comprises: a rotation body into which a pipe is inserted in the front-rear direction, and which rotates by receiving power from a motor; a tool holder coupled to the rotation body to rotate together with the rotation body; a tool provided to cut or chamfer the pipe and fixed to the tool holder; and an adjustment assembly into which the rotation body is inserted and configured to move the tool holder in the radial direction of the rotation body. The present invention provides the pipe cutting apparatus capable of forming the high-quality pipe cut surface while minimizing generation of noise and dust.

Description

Pipe cutting device {PIPE CUTTING DEVICE}

The present invention relates to a pipe cutting device, and more particularly, to a pipe cutting device in which chamfering is performed together with the cutting of the pipe.

In general, synthetic resin pipes are manufactured by extrusion molding equipment.

Such a pipe extrusion manufacturing apparatus may basically include a compressor, a die, a sizing die, a cooling device, a cutting device, and the like.

That is, the thermoplastic resin on pellets is put into the hopper attached to the compressor, and the molten resin is pushed toward the extrusion die by the rotation of the screw inside the compressor, and it is molded by a certain shape of the extrusion die, and the product is formed through the sizing die. The product is continuously molded and manufactured by adjusting the dimensions, cooling and solidifying it.

The pipe continuously molded and manufactured in this way is cut to a predetermined length by using a cutting device provided at the end of the extrusion molding device for the convenience of distribution and on-site assembly.

One form of such a cutting device is disclosed in Korean Utility Model Publication No. 1995-0013618. Since such a conventional cutting device cuts a product using a rotary cutter, a large amount of burrs are generated on the cut surface of the product in the product cutting process by the rotary cutter method, thereby reducing the quality of the product, There was a problem in that the perpendicularity of the cut surface with respect to the longitudinal direction was poor.

In addition, since it is necessary to additionally perform a separate chamfering operation on the cut surface after cutting the pipe, additional operation time and cost were required.

Moreover, since the rotary cutter has a large exposed area of the saw blade, there is a high possibility that the operator may be injured by the saw blade of the rotary cutter, and a large amount of dust is generated during product cutting, thereby making the work environment poor.

Korea Utility Model Publication No. 1995-0013618

The present invention provides a pipe cutting device capable of forming a high-quality pipe cut surface while minimizing the generation of noise and dust.

The present invention provides a pipe cutting device capable of performing both a pipe cutting operation and a pipe chamfering operation.

The present invention provides a pipe cutting device that allows an operator to perform tool replacement or device repair without fear of malfunction.

The present invention provides a pipe cutting device for subdividing strip swarf into a form that can be easily discharged.

A pipe cutting device according to the spirit of the present invention includes a rotating body in which a pipe is inserted in the front and rear directions, and rotates by receiving power from a motor; a tool holder coupled to the rotating body and rotating together with the rotating body; a tool provided to cut or chamfer a pipe and fixed to the tool holder; and an adjustment assembly into which the rotating body is inserted and configured to move the tool holder in a radial direction of the rotating body.

The rotating body includes a rotating body having a cylindrical shape extending in the front-rear direction; and a guide rail extending radially from one end of the outer peripheral surface of the rotating body, wherein the tool holder includes a holder body slidably coupled to the guide rail; and a fixture extending from one end of the holder body toward the central axis of the rotating body, to which the tool is fixed.

The tool holder may further include a Hall sensor disposed on one surface of the holder, and the tool may further include a magnet disposed to correspond to the Hall sensor.

a case forming a working room in which the tool holder and the tool are disposed, and including a door for opening and closing the working room; a door sensor for detecting opening and closing of the door; a motor driving unit for driving the motor; and a control unit configured to control the motor driving unit based on signals from the hall sensor and the door sensor, wherein the control unit is configured to prevent the motor from being driven when it is determined that the door is opened based on a signal from the door sensor control the motor driving unit, determine whether the tool is separated from the tool holder based on a signal from the hall sensor in a state in which the door is opened, and determine whether the tool is fixed to the tool holder and after the door is opened When it is determined that a predetermined time has elapsed, the motor driving unit may be controlled to drive the motor.

The tool holder may further include a shielding cover that is fixed to the holder and covers the periphery of the tool to prevent scattering of cutting debris.

The tool holder further includes a heating wire that is fixed to the shielding cover so as to be positioned in a moving direction of the tool according to the rotation of the tool holder, and capable of generating heat by receiving power, wherein the heating wire generates heat at a predetermined period, and the tool It can be cut by melting the cutting debris generated in the process of cutting or chamfering this pipe.

The present invention can minimize the amount of noise and dust generated in the cutting operation by cutting the outer circumferential surface of the pipe in the circumferential direction using a tool, and obtain a cut surface with excellent perpendicularity to the longitudinal direction of the pipe.

The present invention can perform chamfering of the cut surface of the pipe while cutting the pipe using various tool tips.

The present invention can prevent an operator from being injured by operating the device while the operator is changing a tool by using various sensors.

The present invention utilizes a hot wire cutter to cut and remove strip swarfs before they damage the pipe or contaminate the tool.

1 is a perspective view of a pipe cutting device according to an embodiment of the present invention.
Figure 2 is a side view showing the configuration of the pipe cutting device shown in Figure 1;
FIG. 3 is an exploded view showing a partial configuration of the pipe cutting device shown in FIG. 2 .
FIG. 4 is a view showing an adjustment assembly of the pipe cutting device shown in FIG. 2 .
5 is an example of a tool tip of the pipe cutting device shown in FIG.
6 is a block diagram of a pipe cutting device according to another embodiment of the present invention.
7 is a view showing a tool holder portion of the pipe cutting device shown in FIG.
8 is a control diagram according to an embodiment in the pipe cutting device shown in FIG.
9 to 10 are pipe cutting apparatus according to another embodiment of the present invention.
11 is a diagram schematically illustrating the arrangement of the heating wire shown in FIG. 10 .
12 is a side view showing the configuration of the pipe cutting device shown in FIG.

The configuration shown in the embodiments and drawings described in this specification is only a preferred example of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings of the present specification at the time of filing of the present application.

The same reference numerals or reference numerals in each drawing in this specification indicate parts or components that perform substantially the same functions. The shapes and sizes of elements in the drawings may be exaggerated for clear explanation.

The terminology used herein is used to describe the embodiments, and is not intended to limit and/or limit the disclosed invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more other features It does not preclude the possibility of the presence or addition of figures, numbers, steps, operations, components, parts, or combinations thereof.

As used herein, terms including ordinal numbers such as “first”, “second”, etc. may be used to describe various components, but the components are not limited by the terms, and the terms are It is used only for the purpose of distinguishing a component from other components. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term “and/or” includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Terms such as "... unit", "... group", and "module" described in the specification mean a unit that processes at least one function or operation, which is implemented by hardware or software or a combination of hardware and software can be Also, "a or an", "one", "the" and like related terms are used herein in the context of describing various embodiments (especially in the context of the claims that follow). Unless otherwise indicated or clearly contradicted by context, it may be used in a sense including both the singular and the plural.

The terms "upper", "lower", "front", "rear", etc. used below are defined based on the drawings, and the shape and position of each component is not limited by these terms.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a pipe cutting device according to an embodiment of the present invention. Figure 2 is a side view showing the configuration of the pipe cutting device shown in Figure 1; FIG. 3 is an exploded view showing a partial configuration of the pipe cutting device shown in FIG. 2 . FIG. 4 is a view showing an adjustment assembly of the pipe cutting device shown in FIG. 2 . 5 is an example of a tool tip of the pipe cutting device shown in FIG.

1 to 5 , the pipe cutting device 1 includes a case 20 , a conveyor 10 , a driving unit 500 , a rotating body 100 , a bearing 600 , a tool holder 300 , and a tool. 400 , and some or all of the adjustment assembly 200 . Meanwhile, the pipe P to be cut of the pipe cutting device 1 may be formed of a plastic (eg, polyvinyl chloride (PVC)) material, but is not limited thereto.

The case 20 may form a working room 20a and a machine room 20b therein. Specifically, the case 20 is arranged in a space surrounded by the outer wall 21 forming the outer wall 21 and the outer wall 21 forming the work room 20a and the machine room 20b and forming the work room 20a and the machine room 20b. It may include a partition wall 22 for partitioning. The partition wall 22 may have a through hole provided so that the rotating body 100 can pass therethrough.

In the working room 20a, the pipe P cutting and/or chamfering process may be performed. A part of the rotating body 100 , the tool holder 300 , the tool 400 , and at least a part of the adjustment assembly 200 may be disposed inside the working chamber 20a . A driving unit 500 for rotating the rotating body 100 may be disposed in the machine room 20b. However, the present invention is not limited thereto, and at least a portion of the driving unit 500 may be disposed outside the case 20 .

The case 20 may include a door 23 for opening and closing the working chamber 20a. The door 23 may be hinged to the outer wall 21 of the case 20 .

The case 20 has a pipe inlet 21a through which the uncut pipe P is introduced into the case 20, and a pipe outlet through which the cut pipe P is discharged from the inside of the case 20 to the outside ( 21b) may be included. The pipe inlet 21a may be formed in the outer wall 21 forming the front surface of the case 20 , and the pipe outlet 21b may be formed in the outer wall 21 forming the rear surface of the case 20 .

The conveyor 10 may continuously move the pipe P. The conveyor 10 may introduce the pipe P into the pipe inlet 21a. The pipe P by the conveyor 10 may be conveyed toward the rotating body 100 (or the pipe inlet 21a).

The conveyor 10 includes a motor 11 , a drive pulley 12 rotated by the motor 11 , a belt 13 coupled to the drive pulley 12 , and a belt 13 coupled to the belt 13 . ) may include a driven pulley 14 receiving the power of the motor 11 through the medium. The driven pulley 14 may move the pipe P as it rotates.

The conveyor 10 may include a friction ring 15 fixed to the outer peripheral surface of the driven pulley 14 and rotated together with the driven pulley 14 . The friction ring 15 may be in direct contact with the outer circumferential surface of the pipe P, and the driven pulley 14 uses the frictional force between the friction ring 15 and the outer circumferential surface of the pipe P to move the pipe P in the front-rear direction. can be moved to

However, the present invention is not limited thereto, and the conveyor 10 may include conveyors of various structures and shapes commonly used.

The pipe cutting device 1 may include a plurality of rollers 16 and/or support rails 17 disposed under the pipe P to support the pipe P. The roller 16 and/or the support rail 17 may guide the forward and backward movement of the pipe P.

The driving unit 500 is coupled to a motor 510 (or “drive motor”) for generating power required for rotation of the rotating body 100 and a shaft of the motor 510 to be rotated by the motor 510 . It may include a driving pulley 520 and a belt 530 coupled to the driving pulley 520 and the rotating body 100 and transmitting the rotational force of the driving pulley 520 to the rotating body 100 .

The rotating body 100 may rotate by receiving the power of the motor 510 with the pipe P inserted in the front and rear directions. The rotating body 100 may be rotatably coupled to the case 20 . The bearing 600 may be fixed to the through hole of the partition wall 22 , and the rotating body 100 may be rotatably supported by the bearing 600 fixed to the partition wall 22 .

The rotating body 100 extends in the front-rear direction and extends in the radial direction from one end of the outer peripheral surface of the rotating body 110 having a cylindrical shape having a hollow 111 and the rotating body 110 and the movement of the tool holder 300 . It may include a guide rail 120 for guiding the, and a pulley part 112 formed on the outer peripheral surface of the other end of the rotating body 110 and to which the belt 530 is coupled. The guide rail 120 may include a plurality of guide rails 121 and 122 .

The rotating body 110 may be partially disposed in the working room 20a and the rest may be disposed in the machine room 20b by penetrating the partition wall 22 . The guide rail 120 may be connected to a part of the rotating body 110 (ie, the front end of the rotating body) disposed in the working room 20a, and the pulley part 112 is a rotating body disposed in the machine room 20b. It may be formed in a portion of the entire body 110 (ie, the rear end of the rotating body).

A pipe P to be cut may be disposed in the hollow 111 of the rotating body 110 . Rotating body 110 may surround the pipe (P). The pipe P may pass through the rotating body 110 .

The rotating body 110 may rotate about the central axis of the rotating body 110 extending in the front-rear direction in a state in which the pipe P is disposed in the hollow 111 .

As the rotating body 110 rotates, the guide rail 120 fixed to the rotating body 110 may also be rotated.

Meanwhile, the rotating body 100 may include elastic members 131 and 132 (eg, springs). The elastic members 131 and 132 may be compressed or stretched by the tool holder 300 . The elastic members 131 and 132 may apply a restoring force (or elastic force) to the tool holder 300 . One end of the elastic members 131 and 132 may be coupled to one end of the guide rails 121 and 122 connected to the rotating body 110 , and the other end may be coupled to the tool holders 310 and 320 .

The tool holder 300 may be slidably coupled to the guide rail 120 . The tool holder 300 may slide along the guide rail 120 in the radial direction of the rotating body 100 . The tool holder 300 may include a plurality of tool holders 310 and 320 . The guide rail 120 may include a pair of a first guide rail 121 and a second guide rail 122 , and the elastic members 131 and 132 are a first elastic member corresponding to the first guide rail 121 . The second elastic member 132 corresponding to the 131 and the second guide rail 122 may be included, and the tool holder 300 may include a pair of tool holders 300 corresponding thereto. The pair of tool holders 300 may include a first tool holder 310 corresponding to the first guide rail 121 and a second tool holder 320 corresponding to the second guide rail 122 .

The tool 410 fixed to the first tool holder 310 and the tool 420 fixed to the second tool holder 320 may be the same or different from each other. For example, the first tool 410 fixed to the first tool holder 310 may include a disk-shaped cutting tool tip 411 having a rotating disk, and the first tool 410 fixed to the second tool holder 320 . The second tool 420 may include a chamfering tool tip 421 having an inclined surface 421a inclined at a predetermined angle with respect to the front-rear direction. A plurality of tools with different tool tips may be interchangeable with each other, and a user may change the tool fixed to the tool holder to suit the application.

When the rotating body 100 rotates, the first tool 410 of the first tool holder 310 may cut the pipe P, and the second tool 420 of the second tool holder 320 may cut the pipe. The cut portion of the pipe (P) can be chamfered while cutting (P). Such cutting and chamfering can be performed continuously and simultaneously. Therefore, it is possible to produce a pipe that has been cut and chamfered without a separate chamfering operation.

The tool holder 300 extends from one surface of the holder body 311 and 321 and the holder body 311 and 321 toward the central axis of the rotating body 110 (or toward the pipe P) and the tools 411 and 421 are fixed. It may include a holder roller (313, 323) coupled to one end of the holder (312, 322) and the holder body (311, 321). The configuration of the first tool holder may be expressed by attaching “first”, and the configuration of the second tool holder may be expressed by attaching “second”.

The holder bodies 311 and 321 may be slidably coupled to the guide rails 121 and 122 . For example, the guide rails 121 and 122 may include rail grooves 121a and 122a formed inside to extend in the radial direction of the rotating body, and the holder bodies 311 and 321 are inserted into the rail grooves 121a and 122a. It may include coupling protrusions 314 and 324 that are slidably coupled. At this time, one end of the elastic members 131 and 132 may be coupled to the corresponding coupling protrusions 314 and 324, and according to the movement of the holder bodies 311 and 321 (eg, coupling protrusions 314 and 324), the elastic members 131 and 132 are compressed or tensioned. can be

However, the present invention is not limited thereto, and since the guide rails 121 and 122 slidably penetrate the holder bodies 311 and 321 , the tool holders 310 and 320 may be slidably coupled to the guide rails 121 and 122 .

The adjustment assembly 200 may coordinate radial movement of the tool holder 300 . In other words, the adjustment assembly 200 may move the tool holders 310 and 320 in the radial direction (or the radial direction of the rotating body 100 ) along the guide rails 121 and 122 .

The adjustment assembly 200 includes a moving block 210 for moving the tool holder 300 , a slide ring 22 for moving the moving block 210 , and a driving cylinder for generating power to move the slide ring 220 ( 240 , and a power transmission link 230 for transmitting the power of the driving cylinder 240 to the slide ring 220 .

The moving block 210 may be slidably coupled to the rotating body 100 (eg, rotating body 110). The moving block 210 may move in the front-rear direction relative to the rotating body 100 . The moving block 210 may be disposed in front of the slide ring 220 .

The moving block 210 has a cylindrical shape having a hollow 212, and the rotating body 110 is fixed to the outer peripheral surface of the moving block body 211 and the moving block body 211 is inserted into the hollow 212 and a tool holder. It may include guide holders 213,214,215,216 that are slidably coupled to the 300.

The inner peripheral surface of the moving block body 211 may correspond to and contact the outer peripheral surface of the rotating body 110 . The central axis of the moving block body 211 may coincide with the central axis of the rotating body 110 . The moving block body 211 may be disposed between the guide rail 120 and the slide ring 220 . The moving block body 211 may be disposed at the rear of the guide rail 120 , and may be disposed at the front of the slide ring 220 .

The guide holders 213 , 214 , 215 , 216 may be disposed at the rear end of the moving block body 211 .

The guide holders 213 , 214 , 215 , and 216 may include a plurality of guide holders 213 , 214 , 215 and 216 . The guide holders 213 , 214 , 215 , 216 include a first guide holder 213 and a second guide holder 214 coupled to the first tool holder 310 , and a third guide holder 215 coupled to the second tool holder 320 . and a fourth guide holder 216 . The first guide holder 213 and the second guide holder 214 may be parallel to each other (or parallel). The third guide holder 215 and the fourth guide holder 216 may be parallel to each other (or parallel).

Hereinafter, the shape features of the guide holder (213, 214, 215, 216) will be described by taking the first guide holder (213) as an example. Of course, these descriptions may be directly applied to the second to fourth guide holders 214 , 215 , and 216 . Afterwards, the configuration of the first guide holder 213 can be attached to "first", the configuration of the second guide holder 214 can be attached to the "second", and the configuration of the third guide holder 215 is "Third" can be attached, and "fourth" can be attached to the configuration of the fourth guide holder 216 .

Each of the plurality of guide holders 213,214,215,216 is a vertical extension extending in one direction (eg, the radial direction of the moving block body 211, or the secant line of the cross-sectional circle of the moving block body 211, or the vertical direction) ( 213a) and extending in a direction substantially perpendicular to the one direction from one end of the vertical extension part 213a (eg, the direction in which the directional rotating body 110 or the moving block body 211 extends, or the front-rear direction) At one end (eg, the front end) of the horizontal extension portion 213b and the horizontal extension portion 213b to be bent and extended in a direction away from the central axis of the moving block body 211 (or the central axis of the rotating body) A bent portion 213c may be included.

The horizontal extension portion 213b may extend forward from one end of the vertical extension portion 213a toward the guide rail 120 (or the tool holder 300 ). The bent part 213c may be connected to the front end of the horizontal extension part 213b, and the vertical extension part 213a may be connected to the rear end of the horizontal extension part 213b. The horizontal extension portion 213b and the bent portion 213c of each of the plurality of guide holders 213 , 214 , 215 and 216 may be disposed on the same plane.

The bent portion 213c extends from one end (eg, the front end) of the horizontal extension portion 213b to one (eg, forward) (or toward the guide rail 120 ) from the central axis of the moving block body 211 . It may be inclined with respect to the horizontal extension part 213b so as to move away from it. An angle between the horizontal extension portion 213b and the bent portion 213c may be approximately 40° or more and 60° or less.

The guide holder 213 may include a guide groove 213d formed in the bent portion 213c and into which the holder roller 313 of the tool holder 310 is inserted and coupled. The guide groove 213d may extend in a direction in which the bent portion 213c extends. That is, the guide groove 213d may extend along the bent portion 213c.

The holder roller 313 may slide inside the guide groove 213d. Specifically, the holder roller 313 of the first tool holder 310 may be slidably inserted into the guide groove 213d of the first and second guide holders 213 and 214 , and the holder of the second tool holder 320 . The roller 323 may be slidably inserted into the guide grooves of the third and fourth guide holders 215 and 216 . Accordingly, the tool holder 320 may be coupled to the guide holder 213-216 to be movable along the guide groove 213d. The holder rollers 313 and 323 may be a pair of wheels rotatably coupled to the rear ends of the holder bodies 311 and 321 so as to correspond to a pair of guide holders 213-216 coupled to one tool holder 310, 320, It may have a cylindrical shape that is fixed so as not to be rotated.

The slide ring 220 may have a ring shape. The slide ring 220 may be rotatably coupled to the rotating body 110 . The rotating body 110 may be inserted into the slide ring 220 and may pass through the slide ring 220 . The slide ring 220 may be disposed at the rear of the moving block 210 .

The slide ring 220 can receive the power of the driving cylinder 240 through the power transmission link 230 and move in the forward and backward directions, and press the moving block 210 (eg, the moving block body 211) by pressing can be moved For example, the slide ring 220 may move the moving block 210 forward.

The driving cylinder 240 may be disposed on the case 20 . The driving cylinder 240 may be fixed to the outer wall 21 forming the upper surface of the case 20 . The driving cylinder 240 may include a hydraulic cylinder. The piston rod 241 of the driving cylinder 240 can be viewed rearward. On the other hand, when the driving cylinder 240 is disposed on the upper part of the case 20, the case 20 is a power transmission link 230 for connecting the driving cylinder 240 and the sliding ring 220 outside the case 20. It may include an opening 24 formed in the outer wall 21 forming the upper surface so that (eg, the first and second link members 232 and 234 ) can pass therethrough.

The power transmission link 230 includes a connecting bar 231 that is coupled (or hinged) to the piston rod 241 of the driving cylinder 240, and one end (eg, upper end) is rotated at both ends of the connecting bar 231 . A first link member 232 and a second link member 233 that are operably coupled (or pin coupled) and the other end (eg, lower end) is rotatably coupled (or pin coupled) to the side surface of the slide ring 220 . ) and a first support link 234 rotatably coupled (or pin-coupled) to approximately the middle portion of the first and second link members 232 and 233 and fixed to the case 20 (eg, partition wall 22). ) and may include a second support link. Meanwhile, the illustration of the second support link in FIG. 4 is omitted.

When the driving cylinder 240 is not driven and the piston rod 241 is not extended, the first and second link members 232 and 233 may be arranged to extend in an approximately vertical direction, and the slide ring 220 is It may be located in the first position (S1).

When the driving cylinder 240 is driven to extend the piston rod 241 toward the rear, the piston rod 241 pushes the connecting bar 231 rearward, and the first and second links to which the connecting bar 231 is coupled. The first and second link members 232 and 233 are support links 234 so that the upper ends of each of the members 232 and 233 face the rear and the lower ends of the first and second link members 232 and 233 to which the slide ring 220 is coupled face the front. ) and the combined axis (234a) can be rotated around. The slide ring 220 coupled to the lower ends of the first and second link members 232 and 233 may be moved forward together by the movement of the first and second link members 232 and 233 . The position at this time may be referred to as a second position S2. That is, by the driving cylinder 240 and the power transmission link 230 , the slide ring 220 may be moved to the second position S2 positioned in front of the first position S1 .

The first and second support links 234 may extend rearward from the shaft 234a and may be fixed to the partition wall 22 .

Hereinafter, the operation of the pipe cutting device 1 will be described in detail.

The conveyor 10 may transport the pipe P, and the pipe P may be inserted into the hollow 111 of the rotating body 110 .

The slide ring 220 at the first position S1 may be moved to the second position S2 by the driving cylinder 240 and the power transmission link 230 . That is, the slide ring 220 may be moved forward. As the slide ring 220 moves forward, the moving block 210 may be moved forward by pushing it. When the moving block 210 is moved forward, the guide groove 213d is translated forward, and as the guide groove 213d is translated forward, the guide holder 213-216 (eg, bent part 213c) ) can press the holder rollers 313 and 323 disposed in the guide groove 213d toward the central axis (or toward the pipe P), and the tool holder 300 pressed by the guide holder 213-216. (For example, the holder rollers 313 and 323) may be moved in a direction gradually approaching the pipe P along the guide rails 121 and 122. As the tool holders 310 and 320 move in a direction closer to the pipe P, the elastic members 131 and 132 may be elastically deformed (eg, compressed) by the tool holders 310 and 320 .

When positioned in the second position (S2), the tool 400 may be in contact with the pipe (P). In a state in which the tool 400 is in contact with the pipe P, the rotating body 100 may be rotated by the motor 510 .

The guide rail 120 , the tool holder 300 , and the tool 400 rotated together with the rotating body 100 may cut the pipe P and chamfer the cut surface of the pipe P at the same time. Specifically, the first tool 410 including the disk-shaped cutting tool tip 411 can cut the pipe P, and the second tool 420 including the chamfering tool tip 421 is the pipe ( P) can be cut and chamfered.

At this time, the slide ring 220 and the moving block 210 may be moved forward little by little while the cutting operation is in progress, and the tool holder 300 may be gradually moved toward the central axis of the pipe P during the cutting operation. .

After the cutting and chamfering operation is completed, the slide ring 220 may be restored to the first position S1. When the slide ring 220 is moved rearward, the elastic members 131 and 132 that have been deformed by the tool holder 300 are restored and a restoring force may be applied to the tool holder 300 . The elastic members 131 and 132 may apply a restoring force to the tool holder 300 in a direction away from the pipe P, and thereby, the tool holder 300 is moved along the guide rail 120 in a direction away from the pipe P. have a tendency to move. The tool holder 300 receiving the restoring force while being disposed in the guide groove 213d may press the guide holder 213-216 in a direction perpendicular to the center axis of the rotating body 100 . At this time, since the slide ring 220 supporting the rear end of the moving block 210 does not support the moving block 210 away from the rear end, the moving block 210 (eg, guide holder 213-216) is a tool. The holder 300 cannot withstand the pressure of the holder 300 and is moved backward, and the tool holder 300 may move along the guide rail 120 to move away from the pipe P.

6 is a block diagram of a pipe cutting device according to another embodiment of the present invention. 7 is a view showing a tool holder portion of the pipe cutting device shown in FIG. 8 is a control diagram according to an embodiment in the pipe cutting device shown in FIG. The above-described content with respect to the pipe cutting device shown in Figs. 1 to 5 can be applied as it is to the pipe cutting device shown in Figs. A description of overlapping parts will be omitted.

6 to 8 , the pipe cutting device 1 includes a door sensor 30 , a hall sensor 50 , a first communication module 40 , a second communication module 60 , a control unit 70 , and A motor driving unit 80 for driving the motor 510 may be further included. The motor driving unit 80 may control whether the motor 510 is driven (or operated), a speed of the motor, a rotation direction of the motor, and the like.

The door sensor 30 may acquire information on whether the door 23 of the case 20 is opened or closed. For example, when the door 23 is closed, the door sensor 30 may generate a detection signal, and when the door 23 is open, the door sensor 30 may not generate a detection signal. The door sensor 30 may include a commonly used door sensor. The door sensor 30 may be disposed on the door 23 and/or the outer wall 21 of the case 20 .

The first communication module 40 may transmit the signal of the door sensor 30 to the controller 70 in a wired or wireless manner. The door sensor 30 and the control unit 70 may transmit and receive signals to each other via the first communication module 40 . The first communication module 40 may be disposed on the outer surface of the case 20 or inside the case 20 .

The hall sensor 50 may acquire information on whether the tool 400 is separated (or coupled). Specifically, the hall sensor 50 may sense or detect whether the tool 400 is detached from the tool holder 300 (eg, the fixtures 321 and 322 ) or is coupled to the tool holder 300 . The Hall sensor 50 may include a first Hall sensor disposed on the first tool holder 310 and a second Hall sensor disposed on the second tool holder 320 . Hereinafter, a case in which the Hall sensor 50 is disposed in the second tool holder 320 will be described as an example, but the present invention is not limited thereto. Of course.

The second communication module 60 may transmit a signal of the Hall sensor 50 to the controller 70 in a wired or wireless manner. The hall sensor 50 and the control unit 70 may transmit/receive signals to each other via the second communication module 60 . The second communication module 60 may be disposed on the tool holder 320 or may be integrally formed with the Hall sensor 50 .

The Hall sensor 50 may be disposed on one surface (eg, a front surface) of the holder 322 to which the tool 420 is fixed. The hall sensor 50 may receive power through a battery fixed to the tool holder 320 , or may receive power from the outside of the case 20 through an electric wire. When power is supplied from the outside of the case 20 through the electric wire, the electric wire may be disposed on the outer circumferential surface of the rotating body 110 or may be disposed on the inner circumferential surface of the rotating body 110, the rotating body 110 ) may be provided with a slip ring at the rear end and electrically connected to the electrode of the slip ring.

The tool 420 is in contact with the pipe P and includes a tool tip 421 for cutting and/or chamfering the pipe P, a weight 422 supporting the tool tip 421, and a hall sensor 50 and A magnet 423 disposed on one surface of the tool 420 (eg, the rear surface of the weight 422 ) may be included to correspond to it. The tool 420 (eg, the weight 422) may be fixed to the holder 322 by a fastening member (eg, a bolt, etc.).

When the tool 420 is coupled to the tool holder 320, the magnet 423 is positioned adjacent to the Hall sensor 50, and the Hall sensor 50 senses or senses the magnet 423 to generate a detection signal. have. When the tool 420 is separated from the tool holder 320 , the hall sensor 50 may not sense or sense the magnet 423 and may not generate a detection signal.

The controller 70 may control the motor driving unit 80 based on signals (or detection signals) of the door sensor 30 and the hall sensor 50 .

When the control unit 70 determines that the door 23 is opened through the door sensor 30 ( S100 ), the control unit 70 controls the motor 510 not to be driven (or to stop the motor 510 ). It is possible to control the motor driving unit 80 (S200).

Thereafter, the control unit 70 may determine whether the tool 420 is separated from the tool holder 320 through the hall sensor 50 ( S300 ).

If it is determined that the tool 420 is separated from the tool holder 320 , the control unit 70 may control the motor driving unit 80 so that the motor 510 is not driven (or the motor 510 is stopped). (S200).

When it is determined that the tool 420 is not separated from the tool holder 320 in a state in which the door 23 is opened (that is, if it is determined that the tool 420 is coupled to the tool holder 320), the control unit 70 can determine how much time has elapsed with the door 23 open (S400). For example, the control unit 70 may determine how much time has elapsed in the state in which the door 23 is opened through a time during which a detection signal is not received from the door sensor 30 .

When it is determined that a predetermined time (eg, 10 minutes) has elapsed (or exceeded) with the door 23 open while the tool 420 is fixed to the tool holder 320 , the controller 70 controls the motor 510 . ) can be controlled to drive the motor driving unit 80 (S500).

The control unit 70 may continuously and continuously repeat the above-described process from the step S100 of determining whether the door 23 is opened or closed.

In this way, it can be prevented that the door for opening and closing the work room is accidentally opened or the pipe cutting device is operated for safety while the door is left open and the tool is replaced. In addition, the pipe cutting device of the present disclosure can determine that the door is operated by intentionally opening the door for reasons such as adding a process when a predetermined time elapses after the door is opened in a state in which the tool is coupled, and the motor operates in the open state can be driven to perform cutting and chamfering operations.

9 to 10 are pipe cutting apparatus according to another embodiment of the present invention. 11 is a diagram schematically illustrating the arrangement of the heating wire shown in FIG. 10 . 12 is a side view showing the configuration of the pipe cutting device shown in FIG. The above-described content with respect to the pipe cutting device shown in Figs. 1 to 5 and/or the above-mentioned content with respect to the pipe cutting device shown in Figs. It can be directly applied to the cutting device. A description of overlapping parts will be omitted.

9 to 12, the tool holder 320 may further include a shielding cover 700 that covers the perimeter of the tool 420 to prevent scattering of cutting debris (or "swarf"). can The shielding cover 700 may be fixed to the holder 322 of the tool holder 320 with an adhesive, a fastening member, or the like. The shielding cover 700 may be formed of a substantially transparent or translucent material such as glass or acrylic. However, the present invention is not limited thereto, and may be formed of an opaque material such as metal. The shielding cover 700 may be rotated together with the rotating body 100 and the tool holder 320 .

The shielding cover 700 includes a first cover portion 710 covering the horizontal circumference of the tool 420 , and a second cover extending from the upper end of the first cover portion 710 and covering the upper portion of the tool 420 . A unit 720 may be included. The first cover part 710 and the second cover part 720 may be connected and may be integrally formed.

The shielding cover 700 (eg, the first cover part 710 ) may be disposed on the moving direction of the tool 420 by the rotation of the rotating body 100 . The shielding cover 700 (eg, the first cover part 710 ) may be disposed in front (or upstream) of the tool 420 in the traveling direction of the tool 420 . Since the cutting debris or dust in the shape of a thin string formed while the tool tip 421 is cutting is mainly formed between the shielding cover 700 (in particular, the first cover part 710 ) and the tool tip 421 , , the shielding cover 700 can effectively block the scattering of cutting debris or dust.

The tool holder 320 may further include heating wire cutters 730 and 740 that include a heating wire 730 capable of generating heat, and cut the string-shaped cutting residue into short pieces to fall to the floor.

The heating wire cutters 730 and 740 may include a heating wire 730 fixed to the shielding cover 700 (eg, the first cover part 710), and a heating wire control module 740 for controlling heat generation of the heating wire 730. have.

One end of the heating wire 730 may be fixed to the shielding cover 700 , and the other end of the heating wire 730 may be fixed to the shielding cover 700 and/or the fixing base 322 . The heating wire control module 740 may be fixed on one surface of the holder 322 . The heating wire control module 740 may include a battery for supplying power, or may receive power from the outside of the case 20 through an electric wire similarly to the description of the hall sensor 50 . The heating wire control module 740 and the heating wire 730 may be electrically connected.

The heating wire 730 may extend in a direction inclined with respect to the extending direction (or front-rear direction) of the pipe (P) (or the rotating body 110). However, the present invention is not limited thereto, and the heating wire 730 may extend in parallel with a direction in which the pipe P (or the rotating body 110 ) extends (or a front-rear direction).

The heating wire 730 may be disposed adjacent to the tool tip 421 . The heating wire 730 may be positioned in a traveling direction of the tool tip 421 . The heating wire 730 may be disposed in front (or upstream) of the tool tip 421 in a traveling direction of the tool tip 421 . As the pipe P is cut by the tool tip 421 , the heating wire 730 may melt and cut cutting debris extending forward of the tool tip 421 in the moving direction of the tool tip 421 . A portion of the cutting debris in contact with the hot wire 730 may be cut.

The heating wire control module 740 may supply power to the heating wire 730 . The heating wire control module 740 controls the heating wire 730 to generate heat for a short time (or "heating duration") (eg, 0.5 seconds) in a certain period (or "heating cycle") (eg, 3 seconds). It can be controlled to repeat. Specifically, the heating wire control module 740 can regulate the power supplied to the heating wire 730, and by adjusting the power supply time and the intermittent period, the heating duration and heating cycle can be adjusted.

The shorter the heating cycle of the hot wire 730 is, the smaller the size of the cutting debris cut by the hot wire 730 is. can grow

The pipe cutting device 1 may further include a basket 800 disposed on the floor of the working chamber 20a and receiving pieces of cutting debris that are cut by the hot wire cutters 730 and 740 and fall. The basket 800 may have a substantially open box shape.

In this way, since cutting residues extending in a string shape using the hot wire cutters 730 and 740 can be cut and removed before they become lumps, the environment of the working room 20a can be kept clean and the tool 420 can be minimized from contamination. can In addition, since the shortened pieces of cutting debris fall and are put in the basket 800 , the user can easily clean the work room by emptying the basket.

In the above, specific embodiments have been shown and described. However, it is not limited only to the above-described embodiments, and those of ordinary skill in the art to which the invention pertains can make various changes without departing from the spirit of the invention described in the claims below. .

One; pipe cutting device
10; conveyor
20; case
100; rotating body
200; adjustment assembly
300; tool holder
400; tool
500; drive unit

Claims (6)

A rotating body in which a pipe is inserted in the front-rear direction and rotated by receiving power from a motor, the rotating body having a cylindrical shape extending in the front-rear direction and a guide rail extending radially from one end of the outer peripheral surface of the rotating body rotating body;
a tool holder coupled to the rotating body and rotating together with the rotating body;
a tool provided to cut or chamfer a pipe and fixed to the tool holder; and
an adjustment assembly into which the rotating body is inserted and moving the tool holder in a radial direction of the rotating body;
the tool holder
a holder body slidably coupled to the guide rail;
a fixture extending from one end of the holder body toward the central axis of the rotating body, the tool being fixed;
a shielding cover fixed to the fixture and covering the periphery of the tool to prevent scattering of cutting debris; and
A heating wire that is fixed to the shielding cover so as to be positioned in the moving direction of the tool according to the rotation of the tool holder and capable of generating heat by receiving power;
The hot wire
A pipe cutting device that generates heat in a certain period and melts and cuts cutting debris generated in the process of the tool cutting or chamfering the pipe.
delete According to claim 1,
the tool holder
It further includes; a hall sensor disposed on one surface of the fixture;
the tool is
A pipe cutting device further comprising a; magnet disposed to correspond to the hall sensor. 4. The method of claim 3,
a case forming a working room in which the tool holder and the tool are disposed, and including a door for opening and closing the working room;
a door sensor for detecting opening and closing of the door;
a motor driving unit for driving the motor; and
Further comprising; a control unit for controlling the motor driving unit based on the signals of the hall sensor and the door sensor;
the control unit
When it is determined that the door is opened based on the signal of the door sensor, the motor driving unit is controlled so that the motor is not driven,
determining whether the tool is separated from the tool holder based on a signal from the hall sensor in a state in which the door is opened;
When it is determined that the tool is fixed to the tool holder and it is determined that a predetermined time has elapsed after the door is opened, a pipe cutting device for controlling the motor driving unit to drive the motor


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