KR100877713B1 - Method and apparatus for manufacturing a heat exchanger tube - Google Patents

Abstract

A method and an apparatus for manufacturing a heat-transfer tube are provided to improve productivity and durability of the heat-transfer tube by coiling a band-shaped thin strip on a bare tube and welding the thin strip to the bare tube, thereby forming heat-transfer fins. A manufacturing method of a heat-transfer tube in which heat-transfer fins are formed on an outer peripheral surface of a pipe-shaped bare tube comprises: a bare tube preparing step(21) of preparing a pipe-shaped tube in which a flowing hole is formed; a step(22) of preparing a band-shaped fin matrix having a width corresponding to height of the heat-transfer fins; a step(23) of coating the surface of the fin matrix with metal capable of being welded to the bare tube to form a fin-forming member; a coiling step(24) of fixing a front end part of the fin-forming member to the bare tube, rotating and moving forward the bare tube, and coiling the fin-forming member on the outer peripheral surface of the bare tube; and a heating step(25) of heating the fin-forming member to weld the fin-forming member onto the bare tube by melting the metal coated on the fin-forming member.

Description

Heat transfer pipe manufacturing method and its manufacturing apparatus {METHOD AND APPARATUS FOR MANUFACTURING A HEAT EXCHANGER TUBE}

The present invention relates to a heat transfer tube manufacturing method and a manufacturing apparatus thereof, and more particularly, to a heat transfer tube manufacturing method and a manufacturing apparatus capable of forming a heat transfer fin by winding and welding a strip-shaped steel sheet on a smooth tube.

In general, a plurality of heat transfer tubes are installed in a heat exchanger installed for performing a heat exchange action in an industrial facility, an air conditioning facility, and various mechanical devices.

The heat transfer tube is composed of a bare tube in the form of a pipe, and a plurality of heat transfer fins formed on the outer circumferential surface of the smooth tube.

The heat transfer fins may be configured in various forms according to the purpose of use or use, but as shown in FIG. 1, a structure in which a heat transfer fin 14 having a screw shape is formed on the outer circumferential surface of the smooth tube 12 is widely used, and is endothermic. Or it is formed to have as large a surface area as possible for the effective performance of the heat radiation function.

The manufacturing method of the heat exchanger tube 10 is formed by the rolling process which applies plastic deformation so that the heat transfer fin 14 of a screw form may protrude on the surface of the said copper pipe by a rolling roller.

In such a conventional method of manufacturing a heat pipe, a heat treatment fin 14 must be formed by physical force, and thus a relatively long processing time is required. In order to form a thin heat transfer fin 14 by rolling, raw materials should be made of a flexible material such as copper pipe. However, copper pipe is an expensive material that is 10 times more expensive per unit weight than iron. An increase in production costs has resulted.

On the other hand, recently, as shown in Figure 2 has been proposed a heat transfer tube 10 to improve the heat transfer efficiency by forming a corrugated portion (14a) on the heat transfer fin 14 to increase the surface area and to disturb the flow of fluid. .

However, since the heat pipe 10 has to form a wrinkled portion 14a on the heat transfer fin 14, the heat transfer pipe 10 cannot be manufactured by the manufacturing method by rolling. Alternatively, after forming the pleats on the heating fins, the heating fins may be coupled to the outer circumferential surface of the smooth tube by a fixing method by an auxiliary tool such as a fixing cap or by an adhesive method, but this manufacturing method is very efficient in manufacturing. It is low and has a disadvantage in that the fixed strength of the heat transfer fin is weak and lacks in durability.

The present invention has been proposed in view of the above, by providing a heat transfer pipe manufacturing method and apparatus for improving the productivity and durability of the heat transfer pipe by winding and forming a heat transfer fin by winding a strip-shaped thin plate on a smooth pipe. The purpose is.

In particular, the present invention is to provide a heat transfer tube manufacturing method and apparatus for reducing the production cost by allowing the heat transfer fin to be formed by using a low-cost thin steel plate mainly composed of iron on the copper smooth tube.

In order to achieve the above object, a heat pipe manufacturing method according to the present invention comprises a heat pipe fin manufacturing method is formed on the outer peripheral surface of the pipe smooth pipe, preparing a smooth pipe for forming a pipe-shaped pipe formed with a flow hole; Preparing a strip-like fin base material to have a width corresponding to the height of the heat transfer fins; A coating step of forming a fin forming member by coating a metal of a material that can be deposited on the smooth tube on the surface of the fin base material; A winding step of winding the pin forming member on the outer circumferential surface of the smooth tube by fixing the distal end portion of the pin forming member to the smooth tube and rotating and moving the smooth tube simultaneously. And a heating step of melting the metal coated on the fin forming member to heat the fin forming member to be welded onto the smooth tube.

Here, it may include a wrinkle forming step of repeatedly forming a wrinkle portion in the longitudinal direction on the pin forming member supplied for performing the winding step.

The smooth tube may be formed of a copper material, and the pin forming member may coat and form a metal having the same material as that of the smooth tube on a strip-shaped steel sheet mainly composed of iron.

In order to achieve the above object, the heat pipe manufacturing apparatus according to the present invention, in the manufacturing apparatus for manufacturing a heat pipe with a heat transfer fin is formed on the outer peripheral surface of the pipe-like smooth pipe, rotating and smoothing the smooth pipe at a predetermined speed at a predetermined speed Tube transfer unit; A pin member supply part for supplying a band-shaped pin forming member coated with a weld metal to be wound on an outer circumferential surface of the smooth tube conveyed by the pipe conveying part; And a heating unit which heats the fin-forming member to be welded onto the smooth tube while the weld metal is melted.

Here, the pipe transfer unit, the driving means; Power transmission means connected to the driving means to transmit a rotational force; A gear box configured to output rotational force to a plurality of output shafts by a single input shaft connected to the power transmission means; A rotary connecting rod having one end connected to each output shaft of the gear box; And a rotating roller which is coupled to the other end of each rotary connecting rod and rotates and is disposed in close contact with the outer circumferential surface of the smooth tube.

The pin member supply unit may include: a reel device rotatably configured so that the pin forming member is rolled and stored in a roll shape and sequentially released; And a guide block in which a vertical groove is recessed to be supplied to the outer circumferential surface of the smooth pipe in a state where the pin forming member supplied from the reel device is inserted and upright, and a pipe guide member is inserted and transported. Can be.

The heating unit may be composed of a gas torch is installed so that the high-temperature flame is radiated by the supplied combustible gas and the flammable gas, the angle can be adjusted.

Here, it may include a wrinkle forming portion configured to repeatedly shape the wrinkle portion along the longitudinal direction on the movement path of the pin forming member.

The pleats may be rotatably installed and constitute a pair of gears engaged with each other.

The heat transfer pipe manufacturing method and apparatus for manufacturing the same of the present invention improve the productivity of the heat transfer pipe compared with the conventional rolled processing, because the coil is formed by winding a strip-shaped thin plate on the smooth tube, and the strip-shaped thin plate is welded. It is fixed to the smooth pipe by the has the effect of increasing the fixed strength and durability.

In particular, since the heating fin can be formed using a low-cost thin steel sheet on the copper smooth tube, the manufacturing cost of the heat transfer tube is significantly reduced.

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

3 is a process chart showing a heat pipe manufacturing method according to an embodiment of the present invention, Figure 4 is a view for explaining a heat pipe manufacturing method according to an embodiment of the present invention.

3 and 4, the method of manufacturing a heat transfer tube according to an embodiment of the present invention comprises the steps of preparing a smooth tube 21, preparing a pin base material 22, coating step 23, winding step ( 24) and a heat transfer tube 10 having a screw-type heat transfer fins 14 on the outer circumferential surface of the smooth tube 12 by a process including a heating step 25.

The step 21 of preparing a smooth tube is to prepare a pipe in the form of a pipe having a flow hole through which fluid flows, and has various materials and diameters suitable for the type, purpose, and use of a heat exchanger to be applied. The pipe may be prepared, but in this embodiment, a pipe of the same material having high heat transfer efficiency and generally applied to a heat exchanger is prepared and performed.

Preparing the pin base material 22 is a step of preparing to have a strip shape by cutting the thin plate to have a width corresponding to the height of the heat transfer fin 14 formed on the outer peripheral surface of the smooth tube 12, in this embodiment It is prepared by winding a thin steel sheet containing iron (Fe) as a main component in the form of a coil. At this time, the pin base material may be formed in a variety of thickness, but in consideration of the heat transfer efficiency within the range of a predetermined strength is prepared as a thin plate thickness possible.

In particular, in the present embodiment it is possible to reduce the manufacturing cost of the heat transfer pipe because the material of the fin base material is to use a significantly lower price than the copper material.

Coating step 23 is a step of forming a fin forming member 15 by coating a metal of a material that can be welded to the smooth tube 12 on the surface of the fin base material (15a), as shown in FIG. On the surface of the pin base material prepared in step 22 of preparing the base material, the welding metal 15b is deposited on the surface of the smooth tube in the heating step 25 described below. At this time, the weld metal 15b may be selected from various materials having a low melting point and excellent heat transfer efficiency and rigidity, but in the present embodiment, the weldability in the heating step is improved by coating the same copper as the material of the smooth pipe. .

The coating step 23 is to sequentially release the pin base material wound in the coil form to perform the copper coating on the surface and then to be wound again in the coil form. As the coating method, conventional electroplating, hot dip plating, or the like may be applied.

The winding step 24 fixes the tip of the pin forming member 15 to the smooth tube 12, rotates the smooth tube 12, and moves forward and moves the pin forming member 15 to the smooth tube 12. It is a step of winding on the outer circumferential surface. That is, when the smooth pipe 12 is moved forward with the rotational motion, the pin forming member 15 fixed to the smooth pipe is wound in a spiral form while being pulled out.

At this time, the fin forming member 15 is supplied in an upright state, the heat transfer fin 14 having a height corresponding to the width of the fin forming member 15 in the state wound on the surface of the smooth tube 12 is obtained To lose.

The heating step 25 is a step of integrating the fin forming member by heating the fin forming member so that the fin forming member 15 is welded onto the smooth tube 12 while the metal coated on the surface thereof is melted. That is, when the fin forming member 15 is heated at the melting temperature of the welding metal 15b, the thinly coated welding metal 15b melts and flows down to the smooth tube 12 to be welded. At this time, the smooth tube 12 is also the same material as the weld metal 15b, so that the surface is melted to some extent while being fused to each other, thereby having a more rigid fixed state.

And, the heating step 25 can be carried out in a variety of ways. For example, the method may be performed by transferring a smooth tube 12 wound around the fin forming member 15 into a heating furnace such as a brazing furnace that maintains a high temperature, or heating by using an oxygen acetylene welding torch. There will be.

The heat pipe manufacturing method according to the present embodiment may further include a pleat forming step 26 for repeatedly forming the pleat 14a in the longitudinal direction on the fin forming member.

Wrinkle forming step 26 is performed before the winding step 24, so that the lower end of the corrugated pin forming member in the winding step 24 is in close contact with the outer peripheral surface of the smooth tube (12). That is, it can be implemented by configuring the device for the formation of wrinkles on the movement path of the pin forming member 15 supplied to the smooth tube 12 side for the winding step 24.

 In addition, the wrinkle portion 14a formed by the wrinkle forming step 26 increases the surface area of the heat transfer fins 24 and performs a function of improving the heat transfer efficiency by disturbing the flow of the fluid. In addition, since the contact area with the outer circumferential surface of the smooth tube 12 is increased by the pleats 14a, the welding area is increased in the heating step 25, and the heat transfer fin 14 is more firmly fixed.

Hereinafter, a heat pipe manufacturing apparatus according to an embodiment of the present invention will be described in detail.

5 is a view showing the technical spirit of the heat pipe manufacturing apparatus according to the present invention.

Referring to Figure 5, the heat pipe manufacturing apparatus according to the present invention is a device for manufacturing a heat pipe by forming a heat transfer fin on the outer circumferential surface of the smooth tube, the pipe transfer unit 110, the fin member supply unit 120, and the heating unit ( 130).

The pipe conveying unit 110 is a device unit for advancing and conveying at a predetermined speed while rotating the smoothing tube by applying frictional force to the outer circumferential surface of the smoothing tube 12, and forming pins supplied by the pin member supply unit 120 to be described later. The member 15 is wound in the form of a screw on the outer circumferential surface of the smooth tube 12.

The fin member supply unit 120 is a device unit for supplying the fin forming member forming the heat transfer fins 14 on the outer circumferential surface of the smooth tube 12 conveyed by the tube transfer unit 110, and the fin member supply unit 120. The pin forming member 15 supplied by the thin plate has a strip form coated with the weld metal 15b. At this time, the pin forming member 15 is unwound in a coil form to be supplied continuously.

The heating unit 130 is an apparatus unit for heating the weld metal 15b coated on the surface of the fin forming member 15 to be melted and welded onto the smooth tube 12. The heating unit 130 may melt the weld metal 15b. The device may be configured in various ways by various heating mechanisms such as various heating furnaces and welding torches.

Figure 6 is a perspective view showing a heat pipe manufacturing apparatus according to an embodiment of the present invention, the heat pipe manufacturing apparatus as shown in this, the tube transfer portion 110, the fin member supply from one side of the frame 140 having a predetermined shape 120 and the heating part 130 are arrange | positioned sequentially.

The pipe conveying unit 110 is provided with a driving means 111, a power transmission means 112, a gear box 113, a rotary connecting rod 114, and a rotary roller 115.

The drive means 111 is configured to generate power to move forward and move while rotating the smooth tube 12. The drive means 111 is installed in the lower portion of the frame 140 by a geared motor, and the drive sprocket 111 a is formed at an end of the rotation shaft. Is installed.

The power transmission means 112 is a configuration for transmitting the power of the driving means 111 to the gear box 113, for example, the chain 112a, one side of which is connected to the driving sprocket 111a, and the other side of the chain 112a. The driven sprocket 112b to be connected, and the drive shaft 112c coupled to the center of the driven sprocket 112b.

The gear box 113 is configured to output rotational force to a plurality of output shafts by a single input shaft connected to the power transmission means 112, and the box body 113a having a feed hole for moving the smooth tube to the center thereof, In the center of the input shaft gear (not shown), a plurality of output shaft gears (not shown) and meshed with the input shaft gear (not shown), which is built in the box body 113a and coupled to the drive shaft (112c) It has an output shaft 113b to be coupled.

The rotary connecting rod 114 is configured to transmit rotational force to the rotary roller 115 having one end connected to each output shaft 113b and connected to the other end. The rotary connecting rod 114 may be configured as a rod-like structure having a length corresponding to the distance between the gearbox 113 and the rotary roller 115, but preferably the first connecting rod 114a connected to the output shaft 113b. ), A second connecting rod 114b inserted into and installed at the center of the rotary roller 115, and a coil spring-type connecting coil 114c connected to the first connecting rod 114a and the second connecting rod 114b. .

In addition, the second connecting rod 114b is rotatably supported by a separate support member 116 installed on the frame 140 to prevent swinging during the rotation operation.

According to the rotary connecting rod 114 of this structure, the transmission of power is stably performed by the buffering action by the connecting coil (114c) installed between the first connecting rod (114a) and the second connecting rod (114b). In addition, since the connection coil 114c can be adjusted to some extent within the elastic range, the installation of the rotary roller 115 to secure the straightness of the smooth pipe 12 moved through the gear box 113 is possible. You will be able to set the location correctly. That is, even if the first connecting rod 114a and the second connecting rod 114b are not positioned on the same horizontal line to secure the straightness (straight mobility) of the smooth pipe, the connecting coil 114c can be adjusted to some extent. The rotational force can be transmitted stably by connecting with each other.

Rotating roller 115 is rotated by receiving a rotational force from the rotary connecting portion 114 coupled to the center, the outer peripheral surface is in close contact with the outer peripheral surface of the smooth tube 12 to act as a friction force, in this embodiment three The rotary roller 115 was arranged in a triangular configuration so that the smooth tube 12 is located in the inner center.

The rotary roller 115 may be made of a silicon-based material having a relatively large friction coefficient and high durability. The shape of the rotary roller 115 has a substantially wheel shape, but is formed so that the forward feed force is applied to the smooth pipe 12 in close contact. That is, the rotary roller 115 is formed so that the entry side outer diameter of the smoothing tube 12 has a larger outer diameter than the discharge side outer diameter so that the entry side outer peripheral surface is in close contact with the smoothing tube 12 and rotates forwardly. Let's go.

The pin member supply unit 120 includes a reel device 121 for storing the pin forming member 15 wound in a roll shape, and a guide block for guiding the pin forming member 15 to the outer circumferential surface of the smooth tube 12. 122 is provided.

The reel device 121 is a support plate 121a installed in the vertical direction, a lower plate 121b installed on the upper side of the support plate 121a, and having a pin forming member 15 wound in a roll shape on the upper surface thereof, and The upper plate 121b is spaced apart at predetermined intervals and includes a upper plate 121c installed to accommodate the pin forming member 15 therein. The upper plate 121c is formed in a detachable structure for replacing the pin forming member 15 wound in a roll shape, and the winding amount of the pin forming member accommodated therein is drilled on the upper surface of the upper hole forming plate 121d. It is formed so that you can check.

Guide block 122 is installed on the front of the rotary roller 115 to guide the movement of the pin forming member 15 is configured to guide the outer circumferential surface of the smooth tube (12). The guide block 122 has a substantially rectangular parallelepiped shape, but vertical grooves 122a are recessed so that the pin forming member 15 is supplied to the outer circumferential surface of the smooth tube 12 in an upright state. The pipe guide member 122b to be conveyed is formed.

The pipe guide member 122b is a pipe-shaped member in which a moving hole corresponding to the outer diameter of the smooth tube 12 is formed, and the smooth tube 12 is moved through the moving hole of the pipe guide member to be exposed to the outside and at the same time, a vertical groove. It is configured to perform a winding operation with the pin forming member 15 passed through (122a).

The heating unit 130 may be variously configured as long as it is a heating means capable of melting the deposited metal 15b coated on the fin forming member 15. However, in the present embodiment, the heating unit 130 may be heated at high temperature by the combustible gas and the flammable gas. Consists of the gas torch 131 of the flame is radiated, it is rotatably coupled to the angle adjuster 132 is installed to adjust the radiation angle of the flame.

In addition, an exhaust duct device (not shown) for discharging the exhaust gas generated in the heating process of the fin forming member 15 may be configured at the installation position of the heating unit 130.

In the heat pipe manufacturing apparatus according to the present embodiment, the fin forming member 15 further includes a wrinkle forming part 150 for forming the wrinkle part 14a along the longitudinal direction.

The pleats 150 consist of a pair of gears 151 engaged with each other. The gear 151 is rotatably installed on the fixing bracket 153 provided on the upper end of the support shaft 152 installed in a predetermined length.

Preferably, the wrinkle forming portion 150 is installed on the movement path of the pin forming member. That is, when the reel device 121 and the guide block 122 is installed at a position corresponding to the pin forming member 15 to be moved through the engagement portion of the gear 151, wrinkles caused by the shattering of the gear 151 Molding of the portion 14a is performed.

On the other hand, in the heat pipe manufacturing apparatus according to the present embodiment, the guide rail (not shown) is configured on the initial entry side of the smooth tube 12 and the discharge side of the heat transfer tube 10 passing through the heating unit 130, It is preferable to guide the entry of 12) and the discharge of the heat pipe 10.

Hereinafter, the operation of the heat pipe manufacturing apparatus according to an embodiment of the present invention.

First, the smooth tube 12 is inserted so that its tip portion is positioned on the discharge side through the pipe guide member 122b of the guide block 122, and the pin forming member 15 coated with copper on the pin base material 15a. ) Is wound in the form of a coil and installed in the reel device 121, and then the release end of the pin forming member 15 is released to be inserted through the vertical groove 122a of the guide block 122, and the end thereof is a smooth pipe ( Fix in the tip through hole of 12).

At this time, the fixing method of the pin forming member 15 is to insert the end of the pin forming member into the through hole of the smooth tube 12 and insert the fixing rod into the inside of the through hole by the pin forming member (15). The distal end of is fixed to the distal end of the smooth tube 12.

When the driving means 111 is operated in such a state, the output shaft 113b is rotated while the rotational force is transmitted to the gearbox 113 via the power transmission means 112, and the rotary connecting rod coupled to the output shaft 113b ( The rotary roller 115 is rotated by the rotation of the 114.

 Since the rotary roller 115 is in close contact with the outer circumferential surface of the smooth tube 12, the smooth tube 12 is moved and moved while being rotated by the applied frictional force, and at the same time, the pin forming member 15 fixed to the smooth tube 12 is fixed. ) Is pulled and spirally wound on the outer circumferential surface of the smooth tube 12. At this time, the fin forming member 15, which is pulled and released from the reel device 121, is erected via the vertical groove 122a of the guide block 122, so that a heat transfer fin having a structure erected on the smooth tube is obtained.

In addition, the smooth tube 12 in which the pin forming member 15 is wound is advanced and moved to pass through the heating unit 150 side, and the welding metal 15b coated on the pin forming member 15 in this moving process. The fin forming member 15 is integrally fixed to the smooth tube 12 to form the heat transfer fin 14 because the fin is formed on the outer circumferential surface of the smooth tube while being melted by the heating unit 130.

What has been described above is just one embodiment for carrying out the heat pipe manufacturing method and the manufacturing apparatus according to the present invention, the present invention is not limited to the above embodiment, as claimed in the following claims Those skilled in the art to which the present invention pertains without departing from the spirit of the present invention will have the technical idea of the present invention to the extent that various changes can be made.

1 and 2 are a perspective view showing a general heat pipe,

3 is a process chart showing a heat pipe manufacturing method according to an embodiment of the present invention;

Figure 4 is a view for explaining a heat pipe manufacturing method according to an embodiment of the present invention,

5 is a view showing the technical spirit of the heat pipe manufacturing apparatus according to the present invention,

Figure 6 is a perspective view showing a heat pipe manufacturing apparatus according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

10: heat pipe, 12: smooth pipe

14: heating fin, 14a: wrinkles

15: pin forming member 21: preparing a smooth tube

22: preparing the pin base material 23: coating step

24: winding stage 25: heating stage

110: pipe transfer unit 111: driving means

112: power transmission means 113: gear box

114: rotary connector 115: rotary roller

120: pin member supply portion 121: reel device

122: guide block 130: heating unit

140: frame 150: wrinkle molding

Claims (9)

In the heat pipe manufacturing method in which the heat transfer fin is formed on the outer peripheral surface of the pipe smooth pipe, Preparing a smooth pipe for preparing a pipe having a flow hole formed therein; Preparing a strip-like fin base material to have a width corresponding to the height of the heat transfer fins; A coating step of forming a fin forming member by coating a metal of a material that can be deposited on the smooth tube on the surface of the fin base material; A winding step of winding the pin forming member on the outer circumferential surface of the smooth tube by fixing the distal end portion of the pin forming member to the smooth tube and rotating and moving the smooth tube simultaneously. And And a heating step of melting the metal coated on the fin forming member to heat the fin forming member to be welded onto the smooth tube. The method of claim 1, And a corrugation forming step of repeatedly forming a corrugation portion along the longitudinal direction of the fin forming member supplied for performing the winding step. The method according to claim 1 or 2, The smooth tube is formed of a copper material, the fin forming member is a heat pipe manufacturing method characterized in that the coating of the metal of the same material as the smooth tube on a strip-shaped steel sheet mainly composed of iron. In the manufacturing apparatus for manufacturing a heat transfer tube is formed on the outer peripheral surface of the pipe smooth pipe, A pipe conveying unit which rotates the smooth tube and moves forward and at a predetermined speed; A pin member supply part for supplying a band-shaped pin forming member coated with a weld metal to be wound on an outer circumferential surface of the smooth tube conveyed by the pipe conveying part; And And a heating unit which heats the fin-forming member to be welded onto the smooth tube while the weld metal is melted. The method of claim 4, wherein The pipe transfer unit, Drive means; Power transmission means connected to the driving means to transmit a rotational force; A gear box configured to output rotational force to a plurality of output shafts by a single input shaft connected to the power transmission means; A rotary connecting rod having one end connected to each output shaft of the gear box; And Heat pipe tube manufacturing apparatus characterized in that it comprises a rotary roller is coupled to the other end of the rotary connecting rod is rotated in close contact with the outer circumference of the smooth tube. The method of claim 4, wherein The pin member supply unit, A reel device configured to be rotatable so that the pin forming member is wound and stored in a roll shape and sequentially released; And And a guide block in which a vertical groove is recessed to be supplied to the outer circumferential surface of the smooth pipe in a state where the pin-forming member supplied from the reel device is inserted and upright, and a pipe guide member for inserting and transporting the smooth pipe is formed. Heat pipe manufacturing apparatus characterized in that. The method of claim 4, wherein The heating unit is a heat pipe manufacturing apparatus, characterized in that the gas flame is installed by the high temperature flame is radiated by the combustible gas and the flammable gas supplied, the angle adjustable. The method according to any one of claims 4 to 7, Heat pipe manufacturing apparatus characterized in that it comprises a wrinkle forming portion configured to repeatedly shape the wrinkle portion along the longitudinal direction on the movement path of the fin-forming member. The method of claim 8, The corrugated molding unit is rotatably installed, characterized in that consisting of a pair of gears to be engaged with each other.

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