KR100416910B1 - Apparatus for manufacturung fin-tube in the heat exchanger - Google Patents

Abstract

An object of the present invention is to be able to integrally form a pin larger than the diameter of the tube on its outer peripheral surface while advancing the tube in a non-rotating state,

An integrated fin-tube manufacturing apparatus for a heat exchanger according to the present invention for achieving the above object, the transfer means for continuously conveying a tube of a constant length; A chuck rotating means installed to face a predetermined distance from the conveying means and having a through hole penetrated at both ends thereof so that the tube is drawn into and discharged from the inside of the conveying means; A jaw installed on the surface of the chuck facing the conveying means so as to be slidably moved in a center direction thereof; A jaw driving means provided in the chuck rotating means and providing a driving force to forcibly slide the jaw a predetermined distance; A block having an empty space inside and provided with a passage hole through which the tube transferred by the transfer means passes, the block being coupled to the chuck and rotating together with the chuck; A processing means fixed to the jaw and rotating together with the chuck to cut the outer circumferential surface of the tube discharged from the through hole of the block and to stand up to process the pin larger than the outer diameter of the tube; It characterized in that it comprises a tube bending prevention means for preventing the tube from bending by the cutting force of the processing means on the inner surface of the block.

Description

Integrated fin-tube manufacturing device for heat exchanger {APPARATUS FOR MANUFACTURUNG FIN-TUBE IN THE HEAT EXCHANGER}

The present invention relates to an integrated fin-tube manufacturing apparatus for a heat exchanger, and more particularly, an integral fin-tube for a heat exchanger that can form a fin larger than the diameter of the tube on its outer circumferential surface while advancing the tube in a non-rotating state. It relates to a manufacturing apparatus.

In general, heat exchange between two fluids at different temperatures and separated by solid walls can be found in many industrial applications, and the equipment that performs these heat exchanges is called a heat exchanger, and is used for space heating, air conditioning, power generation, and waste heat. It is applied in the recovery chemical process.

In particular, the heat exchanger is applied to the air conditioner, for example, is applied to air conditioners, refrigerators, cold and hot water purifiers and the like.

Since the efficiency of the heat exchanger is greatly influenced by the structure of the tube through which the heat medium moves, the technical development of this heat exchanger has been actively made recently.

As a prior art of a recently developed heat exchanger, for example, patent application No. 19959541616 filed on November 16, 1995.

Schematic of the technique, the wall is pressed between the mandrel and the pinning disc as the tube is rotated, and then under pressure the metal flows into the grooves between the pinning discs to form a ridge or pin on the tube outer surface. .

By the way, the heat exchanger adopting the tube according to the above configuration has a problem in that the heat exchange efficiency is achieved to some extent because the height of the fin is not formed higher than the height of the outer peripheral surface of the tube.

Another example of a recently developed prior art is patent application 1998-22695 filed June 17, 1998.

When the above technique is briefly described, in a fin tube formed by fusion of fins in a spiral shape at predetermined intervals on the outer circumference of a pipe-shaped tube of a predetermined size which is a metal material, the pin is made of a band-like material having a thickness of 0.2 mm and a height of 15 mm or less, and the predetermined pressure is applied. While pressing by 3 to 5 kg / cm ² in sequence on the outer periphery of the tube rotated by the rotating means by means, the connector of the high frequency welder operated at 400 to 600 kHz is fused between the welding position of the outer periphery of the tube and the adhesive portion of the pin. It is manufactured and constituted by the method of energizing so that it may be in close contact with the outer periphery and pin of the tube which are the positions spaced 3-12 mm from the welding point currently being made.

However, the above-described other conventional embodiment configured as described above has a process of manufacturing a tube because the fins are wound in a spiral shape on the outer circumferential surface of the tube and then joined by welding after separately manufacturing the tube and the fin constituting the heat exchanger; There is also a problem in that the manufacturing process is complicated because the process proceeds to the three steps of the process of manufacturing, and the process of welding and coupling the pin and tube.

The present invention has been made to solve the above problems, and provides an integrated fin-tube manufacturing apparatus for heat exchangers that can form a fin larger than the diameter of the tube integrally on its outer peripheral surface while advancing the tube in a non-rotating state. Its purpose is to.

1 is a perspective view showing the overall appearance of the integrated fin-tube manufacturing apparatus for heat exchangers according to the present invention.

Figure 2 is an exploded perspective view showing the configuration of the chuck rotation means and the block and the pin processing means and tube bending means of the present invention.

3 is a cross-sectional view showing the internal configuration of the manufacturing apparatus according to the present invention.

Figure 4 is a cross-sectional view showing the internal configuration of the processing means installed on the chuck main part of the present invention.

5 is a longitudinal sectional view of the conveying means shown in FIG.

6 is a perspective view showing a state in which the cutter constituting the processing means of the present invention is located in the tube.

Figure 7 is a cross-sectional view showing a state that the pin of the tube is processed by the cutter of the present invention.

Figure 8a is a perspective view showing the appearance of the cutter of the present invention.

8B is a plan view of a cutter according to the present invention.

8C is a cross-sectional view taken along the line A-A of FIG. 8B.

8D is a cross-sectional view taken along the line B-B in FIG. 8B.

9 is a cross-sectional view showing the article produced by the manufacturing apparatus of the present invention.

10 is a cross-sectional view showing a state bent to apply the article of Figure 9 to the heat exchanger.

<Description of the symbols for the main parts of the drawings>

100: tube

200: transfer means

300: chuck rotation means

310: Chuck

400: Jaw

500: block

600: processing means

700: tube bending prevention means

An integrated fin-tube manufacturing apparatus for a heat exchanger according to the present invention for achieving the above object, the transfer means for continuously conveying a tube of a constant length; A chuck rotating means installed to face a predetermined distance from the conveying means and having a through hole penetrated at both ends thereof so that the tube is drawn into and discharged from the inside of the conveying means; A jaw installed on the surface of the chuck facing the conveying means so as to be slidably moved in a center direction thereof; A jaw driving means provided in the chuck rotating means and providing a driving force to forcibly slide the jaw a predetermined distance; A block having an empty space inside and provided with a passage hole through which the tube transferred by the transfer means passes, the block being coupled to the chuck and rotating together with the chuck; A processing means fixed to the jaw and rotating together with the chuck to cut the outer circumferential surface of the tube discharged from the through hole of the block and to stand up to process the pin larger than the outer diameter of the tube; It characterized in that it comprises a tube bending prevention means for preventing the tube from bending by the cutting force of the processing means on the inner surface of the block.

Hereinafter, a preferred embodiment of the integrated fin-tube manufacturing apparatus for a heat exchanger according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the overall appearance of the integrated fin-tube manufacturing apparatus for a heat exchanger according to the present invention, Figure 2 is a view showing the configuration of the chuck rotation means and the block and the pin processing means and tube bending prevention means of the present invention 3 is a cross-sectional view showing the internal configuration of the manufacturing apparatus according to the present invention, Figure 4 is a cross-sectional view showing the internal configuration of the processing means installed in the chuck of the present invention, Figure 5 is shown in Figure 3 6 is a perspective view showing a state in which a cutter constituting a processing means of the present invention is located in a tube, and FIG. 7 is a cross-sectional view showing a state in which a pin of a tube is processed by the cutter of the present invention. 8A is a perspective view showing the appearance of the cutter of the present invention, FIG. 8B is a plan view of the cutter according to the present invention, FIG. 8C is a cross-sectional view of the AA line of FIG. 8B, FIG. 8D is a cross-sectional view of the BB line of FIG. 8B, 9 is a cross-sectional view showing the article manufactured by the manufacturing apparatus of the present invention, Figure 10 is a cross-sectional view showing a state bent to apply the article of Figure 9 to the heat exchanger.

As shown, the present invention includes a conveying means 200 for continuously conveying a tube 100 of a constant length; It is installed to face a predetermined distance from the conveying means 200, the through hole 301 is provided with both ends through the tube 100 is drawn into and discharged therein, the chuck rotation for rotating the chuck 310 Means (300); A jaw (400) installed on the surface of the chuck (310) facing the transfer means (200) so as to be slidably moved in a center direction thereof; A jaw driving means provided in the chuck rotating means 300 and providing a driving force to forcibly slide the jaw 400 a predetermined distance; It has an empty space 501 inside, and provided with a through hole 502 through which the tube 100 conveyed by the conveying means 200 passes through is installed to be coupled to the chuck 310 and the chuck A block 500 that rotates with 310; The outer peripheral surface of the tube 100 is fixed to the jaw 400 and rotated together with the chuck 310 while being discharged from the through hole 502 of the block 500, and then stands up of the tube 100. Processing means 600 for processing the pin 110 larger than the outer diameter; The inner surface of the block 500 comprises a tube bending preventing means 700 for preventing the tube 100 is bent by the cutting force of the processing means 600.

Here, the chuck rotation means 300 is configured to rotate the chuck 310 by a separate driving means, for example, a drive motor 330, as shown in Figure 1, the jaw (400) ) Is installed to the chuck 310 by the jaw driving means.

The through hole 301 formed in the chuck rotating means 300 is formed in the chuck 310 as a matter of course.

The chuck rotation means 300 and the jaw 400 and the jaw driving means is a device that is commonly used as a detailed description thereof will be omitted.

As shown in FIGS. 3 and 4, the transfer means 200 includes an upper press roller 210, a lower press roller 220, and a drive motor 240.

The upper press roller 210 has a rounded groove 211 formed at the outer circumference such that the outer circumferential half of the tube 100 is inserted therein and is rotatably installed on the support bracket 230.

The lower pressing roller 220 is spaced apart from the upper pressing roller 210 so that a rounded groove 221 is formed on the outer circumference so that the remaining outer circumferential half of the tube 100 is inserted to be rotatable on the support bracket 230a. Is installed.

The drive motor 240 serves to provide a driving force so that any one of the upper and lower pressure rollers (210, 220) is rotated.

On the other hand, it is further provided with a roller gap adjusting means 250 for moving any one of the upper and lower pressure rollers (210, 220) up and down to adjust the gap therebetween.

Here, the roller gap adjusting means 250 may be a commonly used air or hydraulic cylinder, it is also possible to use a means for converting the rotational movement to a vertical straight line by rotating the lever.

Friction members 260 are further provided on the surfaces of the grooves 211 and 221 of the upper and lower pressure rollers 210 and 220.

The friction member 260 is preferably a rubber coating.

Meanwhile, as shown in FIGS. 2 and 3, the guide means 800 for guiding the tube 100 while the tube 100 passing through the moving means 200 passes through the block 500. This is further provided.

The guide means 800 is composed of a housing 810, a guider 820, and a bearing 830.

The housing 810 is fixed to the outer surface of the block 500 is rotated with it.

The guider 820 has one end outer surface pressed into the inner circumferential surface of the through hole 502 of the block 500, the other end protrudes a predetermined length to the outer surface of the block 500, and the tube 100 is tight. It has a through hole 821 so as to be inserted and discharged.

Here, the gap between the outer circumferential surface of the tube 100 and the inner diameter of the through-hole 821 of the guider 820 should be designed to be conveyed while the tube 100 is smoothly guided.

Therefore, it is stated that no provision is made on the dimensions of the gap.

The bearing 830 is interposed between the guider 820 and the housing 810 to prevent the guider 820 from rotating when the housing 810 rotates.

The guider 820 is provided with a cutting oil supply path 822 to supply cutting oil.

Meanwhile, as illustrated in FIGS. 2 and 4, the processing unit 600 includes a cutter 610, a fixing member 620, and a connecting unit 650.

The cutter 610 serves to cut the outer circumferential surface of the tube 100, as shown in Figures 8a, 8b, 8c, 8d, the preferred embodiment is the upper surface (611a) and lower surface (611b) and It is formed in the shape of a column having six sides of the left and right sides 611c and 611d and the front and rear sides 611e and 611f, and the angle θ1 formed by the upper surface 611a and the left side 611c is 115 °. ˜130 °, the angle θ2 between the upper surface 611a and the front side 611e is 120 ° to 140 °, and the portion where the upper surface 611a and the front side 611e meet is called a line L1. Assuming that the portion where the upper surface 611a and the left surface 611c meet is the line L2, the radius R1 of the portion where the line L1 and the line L2 meet is 2 mm to 3 mm. When the portion where the lower surface 611b and the front side surface 611e meet each other is a line L3 and the portion where the lower surface 611b and the left side 611c meet each other is a line L4. L3) and line (L4) only Is the radius (R2) of the portion is configured to be 0.3㎜ ~ 1㎜.

More preferably, the angle θ3 formed by the line L3 and the right surface 611d is 80 ° to 85 °.

The fixing member 620 is fixed to the jaw 400.

As shown in FIG. 4, the connecting means 650 serves to connect the cutter 610 to the fixing member 620.

The connecting means 650 includes a cutter holder 651, a holder clamp 652, a pressure bolt 653, and a pressure nut 654.

An insertion groove 651a is formed in the cutter holder 651 so that the cutter 610 is inserted into a predetermined length. The insertion hole 651a communicates with the insertion groove 651a so that the fastening bolt 651c is screwed to the insertion groove ( In order to fix the cutter 610 inserted into the 651a, a fastening hole 651b is formed in angular communication with the insertion groove 651a so that the fastening bolt 651c is screwed.

The holder clamp 652 has an insertion groove 652a formed at one end thereof so that a portion of the cutter holder 651 can be rotatably inserted therein, and a screw hole for communicating with the insertion groove 652a at the other end thereof. 652d) is formed, and the fastening hole 652b communicated with the insertion groove 652a so that the fastening bolt 652c is screwed to fix the cutter holder 651 inserted into the insertion groove 652a. Have

The pressurizing nut 654 is screwed to the screw hole 652d of the holder clamp 652, and screwed to the pressurizing bolt 653, the other end of the holder clamp 652 Play a supportive role.

Meanwhile, an angle variable long hole 652e having a constant curvature is formed in the holder clamp 651 so that the holder clamp 651 is variably installed in the fixing member 620, and the angle variable long hole 652e is formed. The fastening bolt 621 is inserted through the screw is screwed to the fixing member 620.

On the other hand, the tube bending preventing means 700, as shown in Figures 2 and 3, the support rod 710 is fixed to the inner surface of the block 500 and the support rod 710 to be rotatable Combination is installed is composed of a bearing 720 in contact with the outer peripheral surface of the tube (100).

At least two support rods 710 are installed in the block 500, and the support rods 710 are divided so that the angle formed with the processing means 600 is 120 °.

Referring to the operation of the manufacturing apparatus according to the present invention configured as described above are as follows.

First, by operating the roller gap adjusting means 250 to space the predetermined distance between the upper pressure roller 210 and the lower pressure roller 220, and then manually insert the tube 100 therebetween.

Next, the roller gap adjusting means 250 is operated again so that the grooves 211 and 221 formed in each of the upper press roller 210 and the lower press roller 220 are in contact with the outer peripheral surface half of the tube 100, respectively. do.

After the above operation, the driving motor 240 is driven so that any one of the upper and lower pressure rollers 210 and 220 is rotated.

When any one of the upper and lower pressure rollers 210 and 220 starts to rotate by the driving of the driving motor 240 as described above, the tube 100 is each of the upper pressure roller 210 and the lower pressure roller 220. In the grooves 211 and 221 formed in the by the frictional force with the friction member 260 is started to move forward to the block 500 side.

As described above, the operator guides the front end of the tube 100 to be moved forward into the through hole 502 of the block 500.

In this case, the tube 100 passes through the inside of the block 500 while continuously moving forward.

Thereafter, when the end of the tube 100 passes through the area of the cutter 610 of the processing means 600, the driving of the transfer means 200 is temporarily stopped, and then the operation of setting the position of the cutter 610 is performed. Will be implemented.

Hereinafter, an operation of setting the position of the cutter 610 will be described.

First, loosen the fastening bolt 651c fastened to the cutter holder 651 to adjust the length of the cutter 610 in the insertion groove 651a of the cutter holder 651, and then tighten the fastening bolt 651c again. Proceed.

Next, by loosening the fastening bolt 652c for fastening the cutter holder 651 to the holder clamp 652, the cutter holder 651 is rotated in the insertion groove 652a of the holder clamp 652 by a length and a predetermined angle. The direction of 610 is adjusted to be in the state as shown in FIG. 6, and then the fastening bolt 652c is tightened again.

Next, the pressure bolt 653 and the press nut 654 are fastened to the screw hole of the holder clamp 652 to reliably prevent the flow of the cutter holder 651.

Next, the fastening bolt 621 is released to perform the operation to change the angle of the holder clamp 651 with respect to the fixing member 620.

That is, when the fastening bolt 621 is rotated and the holder clamp 651 is rotated, the fastening bolt 621 moves along the angular variable long hole 652e, and eventually the holder clamp 651 with respect to the fixing member 620. ) Will change the angle.

As described above, when the holder clamp 651 is changed in angle with respect to the fixing member 620, the position of the cutter 610 illustrated in FIG. 6 is changed on the tube 100.

The fundamental reason for varying the angle of the holder clamp 651 as described above is because the outer peripheral surface of the tube 100 cannot be cut at the initial setting angle when the outer diameter of the tube 100 is different.

The setting operation of the processing means 600, the setting operation of the cutter 610 as described above may be performed before fastening the fixing member 620 to the jaw 400, fastening the fixing member 620 to the jaw 400 May be done afterwards.

When the setting work of the cutter 610 is completed as described above, the jaw driving means is driven to move the jaw 400 in the center direction of the chuck 310 by a predetermined distance.

When the jaw 400 moves as described above, the entire processing means 600 moves together with the jaw 400.

Thus, as shown in FIG. 8A, the "e" portion of the cutter 610 is drilled into the tube 100 at a predetermined cutting depth.

When the above operation is completed, the jaw driving means is driven to move the jaw 400 a predetermined distance in the direction of the outer circumferential surface of the chuck 310 to reverse the processing means 600.

Thereafter, the chuck rotating means 300 is driven to allow the block 500 to be rotated together with the chuck 310, and the chuck rotating means 300 is restarted, and the jaw driving means is driven again to drive the jaw driving means again. The jaw 400 is moved a predetermined distance in the center direction of the 310 to allow the "e" portion of the cutter 610 to dig a predetermined depth into the tube 100.

In this state, the tube 100 is advanced at a predetermined speed, and the cutter 610 is inserted into the tube 100 at a predetermined cutting depth with the chuck 310 and the tube 100. It will rotate along the outer circumference of).

Accordingly, the outer peripheral surface of the tube 100 is cut along the shape of the end of the cutter 610, and the cut part is continuously helically formed according to the shape of the end of the cutter 610. In the fin 100 is formed with a diameter larger than the outer diameter of the tube (100).

On the other hand, the bending of the tube 100 is generated during the processing of the processing means 600 as described above, it is prevented by the tube bending prevention means 700.

That is, the cutting force of the cutter 610 is reversely supported at the point opposite to the cutting direction so that the tube 100 is not bent.

In addition, in the process of rotating the cutter 610 to cut the outer circumferential surface of the tube 100 which is advanced in the non-rotating state, the tube 100 itself is distorted, which causes the transfer means 200 described above. By adjusting the distance and pressure between the grooves 211 and 221 formed in the upper and lower pressure rollers 210 and 220 to be configured, the torsion phenomenon of the tube 100 can be prevented.

On the other hand, the guide means 800 in the configuration of the present invention is to more smoothly transfer the transfer of the tube 100, through the cutting oil supply path 822 formed in the guider 820 constituting the guide means 800 The cutting oil can be supplied to the cutter 610.

The integrated fin-tube 100 for a heat exchanger produced according to the configuration and operation of the present invention as described above has a fin 110 integrally larger than the outer diameter of the tube 10 in a spiral shape as shown in FIG. I can have it.

It is a matter of course that the one-piece pin-tube produced as described above can be bent into a zigzag type as shown in FIG.

As described above, according to the integrated fin-tube manufacturing apparatus for the heat exchanger according to the present invention, by advancing the tube in a non-rotating state by integrally forming a fin larger than the diameter of the tube on its outer peripheral surface, further improve heat exchange efficiency In addition, the manufacturing process is also easily proceeded to be able to greatly improve the productivity.

Claims (15)

A conveying means 200 for continuously conveying a tube 100 of a predetermined length; It is installed to face a predetermined distance from the conveying means 200, the through hole 301 is provided with both ends through the tube 100 is drawn into and discharged therein, the chuck rotation for rotating the chuck 310 Means (300); A jaw (400) installed on the surface of the chuck (310) facing the transfer means (200) so as to be slidably moved in a center direction thereof; A jaw driving means provided in the chuck rotating means 300 and providing a driving force to forcibly slide the jaw 400 a predetermined distance; It has an empty space 501 inside, and provided with a through hole 502 through which the tube 100 conveyed by the conveying means 200 passes through is installed to be coupled to the chuck 310 and the chuck A block 500 that rotates together with 310; The outer peripheral surface of the tube 100 is fixed to the jaw 400 and rotated together with the chuck 310 while being discharged from the through hole 502 of the block 500, and then stands up of the tube 100. Processing means 600 for processing the pin 110 larger than the outer diameter; Integral fin-tube for heat exchanger, characterized in that the inner surface of the block 500 includes a tube bending preventing means 700 for preventing the tube 100 from being bent by the cutting force of the processing means (600). Production equipment. The method of claim 1, The transfer means 200, An upper pressure roller 210 formed with a groove 211 rounded so that the outer circumferential half of the tube 100 is inserted in the outer circumference and rotatably installed on the support bracket 230; A lower pressure roller 220 spaced apart from the upper pressure roller 210 so as to have a rounded groove 221 formed on the outer circumference thereof so as to insert the remaining outer circumferential half of the tube 100 is rotatably installed on the support bracket 230a. Wow; An integrated fin-tube manufacturing apparatus for a heat exchanger, comprising a drive motor (240) for providing a driving force so that any one of the upper and lower pressure rollers (210, 220) is rotated. The method of claim 2, An integrated fin-tube manufacturing apparatus for a heat exchanger, further comprising a roller gap adjusting means 250 for moving one of the upper and lower pressure rollers 210 and 220 upward and downward to adjust the gap therebetween. . The method of claim 2 or 3, The grooves (211) (221) surface of the upper and lower pressure rollers (210) (220), the integrated fin-tube manufacturing apparatus for a heat exchanger, characterized in that the friction member 260 is further provided. The method of claim 4, wherein The friction member 260 is an integrated fin-tube manufacturing apparatus for a heat exchanger, characterized in that the rubber coating process. The method of claim 1, Integrated fins for heat exchanger, characterized in that the guide means for guiding the tube 100 is further provided while the tube 100 passing through the moving means 200 passes through the block 500. Tube making equipment. The method of claim 6, The guide means 800, A housing 810 fixed to the outer surface of the block 500 and rotated with the housing 810; One end of the outer surface is pressed into the inner circumferential surface of the through hole 502 of the block 500, the other end protrudes a predetermined length to the outer surface of the block 500, the through hole so that the tube 100 is closely inserted and discharged A guider 820 having 821; An integrated fin-tube manufacturing apparatus for a heat exchanger, which is interposed between the guider 820 and the housing 810 so as to prevent the guider 820 from rotating when the housing 810 rotates. . The method of claim 7, wherein The guider 820 is an integrated fin-tube manufacturing apparatus for a heat exchanger, characterized in that the cutting oil supply path 822 is formed to supply the cutting oil. The method of claim 1, The processing means 600, A cutter 610 for cutting the outer circumferential surface of the tube 100; A fixing member 620 fixed to the jaw 400; Integrated fin-tube manufacturing apparatus for a heat exchanger, characterized in that it comprises a connection means for connecting the cutter 610 to the fixing member (620). The method of claim 9, The connecting means 650, Insertion groove 651a is formed so that the cutter 610 is inserted into a predetermined length, and the cutter is inserted into the insertion groove 651a by being fastened to the insertion groove 651a so that the fastening bolt 651c is screwed into the insertion groove 651a. A cutter holder 651 having a fastening hole 651b which is in angular communication with the insertion groove 651a such that the fastening bolt 651 is screwed to fix the 610; An insertion groove 652a is formed at one end of the cutter holder 651 so as to be rotatably inserted, and a screw hole 652d is formed at the other end so as to communicate with the insertion groove 652a. A holder clamp 652 having a fastening hole 652b angularly communicated with the insertion groove 652a such that the fastening bolt 652c is screwed to fix the cutter holder 651 inserted into the groove 652a; A pressure bolt 653 that is screwed into the screw hole 652d of the holder clamp 652; And a press nut (654) screwed to the press bolt (653) to support the other end of the holder clamp (652). The method of claim 10, An angle variable long hole 652e having a constant curvature is formed in the holder clamp 651 so that the holder clamp 651 is variably installed in the fixing member 620, and the angle variable long hole 652e is formed. Fastening bolt 621 is inserted through the integrated fin-tube manufacturing apparatus for a heat exchanger, characterized in that the screw is coupled to the fixing member (620). The method according to claim 9 or 10, The cutter 610 is formed in a columnar shape having a top surface 611a, a bottom surface 611b, a left and right side surfaces 611c and 611d, and a front surface of the front and rear surfaces 611e and 611f. ) And the left side surface 611c have an angle θ1 of 115 ° to 130 °, and the top surface 611a and the front side 611e have an angle θ2 of 120 ° to 140 °. A line where the upper surface 611a and the left side 611c meet as a line L2 is assumed to be a line L1. The line L1 and the line L2 are assumed to be lines L2. The radius R1 of the portion where) meets is 2 mm to 3 mm, assuming that the portion where the lower surface 611a and the front side surface 611e meet is a line L3, the lower surface 611b and the left side surface 611c. Assuming that the meeting portion is a line (L4), the radius (R2) of the portion where the line (L3) and the line (L4) meet is characterized in that the fin-tube manufacturing apparatus for a heat exchanger characterized in that 0.3mm ~ 1mm. The method of claim 12, The angle (θ3) formed by the line (L3) and the right side (611d) is an integrated fin-tube manufacturing apparatus for a heat exchanger, characterized in that 80 ° ~ 85 °. The method of claim 1, The tube bending preventing means 700, Heat exchanger comprising a support rod 710 fixedly installed on the inner surface of the block 500 and a bearing 720 rotatably coupled to the support rod 710 to be in contact with the outer circumferential surface of the tube 100. Integral pin-tube making machine The method of claim 14, At least two supporting rods (710) are installed in the block (500), and the fin-tube manufacturing apparatus for a heat exchanger, characterized in that the split is installed so that the angle formed with the processing means 600 is 120 degrees.