KR100659367B1 - Soldering device and method of cooling fin and tube - Google Patents

Abstract

A method for soldering a cooling pin and a tube and a soldering apparatus are provided to improve heat radiation efficiency and to reinforce intensity of adhesiveness between the cooling pin and the tube by performing completely a bonding process using a lead wire. A cooling pin is wound along a periphery of a tube. An acid cleaning process and a first flushing process are performed on the resultant structure. A chemical treatment is performed on the resultant structure in ZnCl2 aqueous solution. A first drying process is performed on the resultant structure for 30 minutes. The resultant structure is loaded on a loading/rotating unit of a soldering machine. A lead wire is interposed between the cooling pin and the tube. A soldering process is performed on the resultant structure in a predetermined temperature range of 150 to 350 degrees. Then, an air cooling process, a deeping process, a second flushing process and a second drying process are sequentially performed thereon.

Description

Soldering device and method of cooling fin and tube

1 is a cooling-fin and tube soldering method and soldering apparatus provided in the present invention

Process diagram showing one embodiment

Figure 2a is a cooling-fin and tube soldering method and soldering apparatus provided in the present invention

Front view showing one embodiment of

Figure 2b is a cooling-fin and tube soldering method and soldering apparatus provided in the present invention

Top view showing one embodiment of

Figure 2c is a cooling-fin and tube soldering method and soldering apparatus provided in the present invention

Left side view showing one embodiment of

Figure 2d is a cooling-fin and tube soldering method and soldering apparatus provided by the present invention

Right side view showing one embodiment of

3 is a cross-sectional view taken along the line 'A-A' of FIG. 2A

Figure 4a is a soldering apparatus of the present invention, the tube is mounted and rotated to drive

Front view showing the configuration of the mounting-rotating device

4B is a top view of FIG. 4A

4C is a left side view of the drive shaft driving unit of FIG. 4A;

Figure 4d is a right side view showing the configuration of the idle shaft of Figure 4a

Figure 5 shows a preferred embodiment of a soldering device in the present invention

Sea perspective

Figure 6a is a front configuration diagram of FIG.

Figure 6b is a plan view of Figure 5

Figure 6c is a left side view of Figure 5

7 is an enlarged cross-sectional view of a portion 'B' in FIG. 6C.

8A is a view of an automatic pedestal for supporting a tube in the soldering apparatus of the present invention.

Left side view showing a preferred embodiment

FIG. 8B is a front configuration view of FIG. 8A

Figure 9a is a plan view showing the top configuration of the automatic pedestal

9B is a front view of FIG. 9A

10 is fabricated by the cold-fin tube soldering apparatus provided by the present invention.

Front view showing an example of a cold fin tube

Figure 11a is a cooling-fin before passing through the soldering device provided in the present invention;

Side view showing enlargement of tube and enlarged cross section

Figure 11b is a cooling-fin after passing through the soldering device provided in the present invention;

Side view and enlarged cross-section of the tube showing the state in which the tube is joined by a lead wire

Saint

■ Explanation of symbols used in main part of drawing ■

1: cooling-pin 2: tube

3: soldering dedicated machine 4: lead wire

5: body 6: soldering device

7: Conveyer 8: Stationary Rotator

9: automatic pedestal 10: lead wire feeder

11: solder holder 12: rail

13: guide roller 14: geared motor

15: Coaxial 16: Pinion

17: rack gear 18: through hole

19: heater 20: drive shaft

21: Idle shaft 21a: Adjustment handle

22: bearing housing 23: adjustment mount

24: geared motor 25: chain coupling

26: Line Power 27: Chain Sprockets

28: chain sprocket 29: chain

30: air cylinder 31: piston

32: roller 33: bracket

The present invention relates to a cooling-fin and tube soldering method and a soldering apparatus, and more particularly, for the complete bonding of the cooling fin and the tube used for low temperature evaporator, such as LNG. It is an object of the present invention to provide a soldering method and a soldering apparatus.

In the conventional cooling-fin and tube used for low temperature evaporator, such as liquefied natural gas, because the cooling-fin is wound around the tube only by a certain pitch, the cooling-fin and the tube are in close contact with each other in a theoretical state. Since it could not be seen, the heat dissipation effect was lowered, and the strength of the fin was weak and tended to be pushed.

Therefore, the present invention is to provide a cooling-fin and tube soldering method and a soldering device of a new configuration that can solve the problems of the conventional cooling-fin and tube coupling structure as described above,

According to the present invention, the heat dissipation effect is increased by soldering and soldering the lead between the fin and the tube by the automatic soldering method, and the fins are pushed by the cooling fan due to the increase in the adhesion strength by the welding of the cooling fin and the tube. The present invention has been completed in view of the technical problem of the present invention in providing a cooling-fin and tube soldering method and a soldering device having a number of advantages such as no phenomenon.

1 is a process diagram showing the overall process of the cooling-fin (1) and tube (2) soldering method provided by the present invention, Figures 2a to 10 is a front view showing a soldering dedicated machine (3) of the present invention; 11A and 11B show side views and cross-sectional views before and after soldering operations of the cooling fins 1 and the tube 2 produced by the soldering method and the soldering apparatus of the present invention. The present invention will be described in detail with reference to these drawings.

The cooling-fin (1) and tube (2) soldering method of the present invention will be described first with a flowchart.

First, the cooling fins (1) are wound around the tube (2) using an auto soldering machine (auto soldering m / c; 3), pickled and retained (when oil), and the foreign matter is completely removed before washing with water. .

In order to ensure good soldering, a tube (2) wound with a cooling fin (1) is added to a 5% aqueous solution of zinc chloride (ZnCl ₂ ) to be chemically treated for 10 minutes.

After removing the tube (2) in the zinc chloride aqueous solution and dried for 30 minutes at room temperature, the tube (2) is mounted on a soldering machine (3).

That is, the welding material is prepared with lead wire (Sn60% + Pb40%) Ø0.5 ± 0.2mm, and operates the soldering machine 3 at a speed of 130mm / min ± 50mm at a temperature of 250 ° C ± 100 ° C. .

A bundle of lead wires (4) is installed on top of the soldering device (6), and one strand of lead wires (4) is inserted between the cooling-fins (1) and wound around the tube (2) two to three turns.

When the soldering device 6 moves and the tube 2 wound around the cooling fins 1 rotates, the lead wire 4 automatically cools as the cooling fins 1 are spirally wound around the tube 2. It is wound between (1).

As the soldering device 6 passes through the tube 2 on which the cooling-fin 1 is wound, the lead wire 4 melts and fusions while completely filling the air gap between the cooling-fin 1 and the tube 2.

In order to prevent sagging of the tube 2 due to heat deformation, a work support device 9 is installed at intervals of 1.5 m, and an auto sensor (not shown) and an air cylinder 30 are provided. To eliminate interference as the soldering device 6 passes.

When the product passes completely through the soldering device 6, the product is air cooled for 10 minutes.

Then, the product is removed from the soldering machine (3) and chemical polishing is performed to remove the surface of the product and remove foreign substances.

The chemical polishing is performed by dipping the product in an aqueous solution in which 15 l of water is added ₂ l of sulfuric acid (H ₂ SO ₄ ), 1 l of nitric acid (NHO ₃ ), and 100 g of sodium dichromate (Na ₂ Cr ₂ O ₇ ) for 20 minutes. .

Finally, after washing with water in a washing tank, it is dried for 30 minutes at room temperature after the air shower (air shower).

The configuration of the soldering dedicated machine 3 of the present invention for producing the cooling-fin 1 integral tube 2 of the present invention manufactured through the above process will be described in more detail below.

In the soldering machine 3 of the present invention, a soldering device 6 is fed to the main frame 5 from side to side by a feeding device 7 and can be continuously welded. Installed so that

After the cooling-fin (1) is spirally wound around the tube (2), the tube (2) can be smoothly mounted while passing through both ends of the tube (2) and supplying a lead wire (4) installed on the soldering device (6). A work piece turning device 8 is provided at both ends of the main body 5, and the long length tube 2 is an auto support device for preventing sagging due to weight and heat. (9) is installed in the main body 5 in several pieces (three in the figure shown).

In addition, a lead wire supply device 10 for automatically installing a lead wire 4 as a solvent between the cooling fins 1 and the tube 2 is installed at the front and rear ends of the soldering device 6.

The soldering operation principle of the soldering machine 3 of the present invention is applied to the drilling device of the spinning machine, the soldering device 6 moves to the left and right while the product is rotated by the stationary-rotating device 8, resulting in failure. The lead wires 4 wound on the solder holder 11 are continuously unwound and automatically wound between the spiral cooling fins 1 and when the soldering device 6 is moved back and forth to improve work efficiency. All have a structure that can be welded.

Hereinafter, the apparatus of the present invention will be described in more detail for each part.

The main body 5 is manufactured to have a length (about 6 m or more) that can be mounted to the long tube 2, and the front and rear upper surfaces of the main body 5 are provided with a rail 12 and soldering having a guide roller 13. Allows the device 6 to move left and right, and the transfer device 7 for driving the left and right of the soldering device 6 installs a geared motor 14 capable of forward and reverse driving on the soldering device 6, and The pinion 16 is axially fixed to the drive shaft 15 of the geared motor 14 so as to mutually bite on the rack gear 17 fixed in the longitudinal direction of the rail 12.

The soldering device 6 is formed of a roughly boxed body so that a through hole 18 is formed so that the tube 2 can pass therethrough, and the lead wire 4 is formed when the tube 2 passes through the through hole 18. A heater 19 is installed therein that is heated so as to be welded to the tube 2 together with the cooling fins 1. The temperature of the heater 19 is, of course, is installed a controller (not shown) that can be set automatically.

On the upper left and right sides of the soldering device 6, a plurality of bobbin-shaped solder holders 11 capable of storing and supplying the lead wire 4 in a wound state are provided on the left and right sides.

On the other hand, the mounting-rotating device 8 capable of holding and rotating the tube 2 coupled with the cooling-fin 1 at the left and right ends when soldering is driven at the left and right ends of the main body 5, respectively. The shaft 20 and the idle shaft 21 are installed in the bearing housing 22 and the adjustment mount 23, and the drive shaft 20 is connected to the geared motor 24 and the chain coupling installed below the main body 5. And a driven chain sprocket 28 axially fixed to an end of the drive chain sprocket 27 and the drive shaft 20, which are connected to the line power 26 and the line power 26, and axially mounted on the line power 26. 29) to drive the connection.

The idle shaft 21 is to be adjusted to the left and right spacing by the adjustment handle 21a on the adjustment mount (23).

In addition, the automatic support 9 for supporting the tube 2 to prevent sagging has a bracket 33 having a roller 32 at the upper end of the piston 31 of the air cylinder 30 installed in the vertical direction on the main body 5. ) Is installed to support the two rollers 32 in a pair to prevent sagging from the bottom of the tube (2). Reference numeral 34 in the figure shows a guide bar.

When fixing the cooling fins 1 to the tube 2 using the soldering machine 3 of the present invention having the above-described configuration, the cooling fins first processed in a spiral shape on the tube 2 ( Wind up 1), combine, pickle wash, remove oils and fats completely and wash with water.

In order to ensure good soldering, zinc chloride (ZnCl ₂ ) was chemically treated in a 5% aqueous solution for 10 minutes, dried in an aqueous zinc chloride solution, dried at room temperature for 30 minutes, and then cooled to a soldering machine (3). Mount the wound tube (2).

That is, the idle shaft 21 is rotated by adjusting the adjustment handle 21a by interposing a tube 2 having a predetermined length between the drive shaft 20 and the idle shaft 21 provided at both ends of the main body 5. As shown in FIG. 2, the tube 2 is completed by transferring to the left side, and the tube 2 is mounted through the through hole 18 formed on the soldering device 6 and the soldering device 6. In the upper part of the), a lead wire 4, which is a welding material, is installed in a solder holder 11 made of a bobbin in a wound state.

In addition, the air cylinder 30 constituting several automatic pedestals 9 installed on the main body 5 is extended and the piston 31 is raised, and the roller 32 installed on the upper bracket 33 of the piston 31 is raised. ) A pair of two supports the tube 2 stably so as not to sag downward due to thermal deformation.

In addition, the end of the lead wire (4) wound on the solder holder 11 is wound around 2-3 turns to be soldered while filling the gap between the cooling-fin (1) and the tube (2).

In this state, when the soldering device 6, the conveying device 7, and the stationary rotating device 8 are operated, the tube 2 on which the cooling fin 1 is wound rotates and the soldering device 6 As the pinion 16 is rotated by the drive of the geared motor 14), the gear moves gradually to the right as shown in FIG. 2 along the rack gear 17 installed in the longitudinal direction on the main body 5.

By moving the soldering device 6, the lead wires 4 spirally wound in the gaps between the cooling fins 1 and the tube 2 are automatically wound in the solder holder 11 while being unwound with the appropriate tension. And when passing through the through hole 18 of the soldering device 6 is melted by the heat source of the heater 19 is soldering is made to be completely fused while filling the gap.

When the lead wire 4 is fused to the cooling fin 1 and the tube 2 by the heater 19 through the through hole 18 of the soldering device 6, the mounting-rotation device 8 is stopped. After cooling the integrated product, the product was separated and the product was added to 15 liters of water for 20 minutes in an aqueous solution containing ₂ liters of sulfuric acid (H ₂ SO ₄ ), 1 liter of nitric acid (NHO ₃ ), and 100 g of sodium dichromate (Na ₂ Cr ₂ O ₇ ). Deeping

Finally, after washing with water in a washing tank, the product is completed by drying at room temperature for 30 minutes after an air shower.

As described in detail above, the cooling-fin and tube soldering method and the soldering apparatus provided by the present invention are automatically soldered for the complete bonding of the cooling-fin (1) and the tube (2) used for a low-temperature evaporator such as LNG. By heat soldering and soldering with lead wires 4 in the space between the cooling fins 1 and the tube 2 by the method and soldering device, the heat dissipation effect is increased and the cooling fins 1 and the tube 2 are welded. Since the adhesion strength is increased, the expected effect of the cooling-fin 1 by the cooling fan or the like does not appear.

Claims (5)

In which the cooling-fin (1) is wound by the tube (2) and integrated by the soldering method to fill the gap with the lead wire (4); Winding and cooling the cooling fins (1) on the outer circumferential surface of the tube (2), washing and washing with water, and Chemically treating the tube (2) wound on the washed cooling fin (1) in a 5% aqueous solution of zinc chloride (ZnCl ₂ ) for 10 minutes; After drying in the aqueous zinc chloride solution and drying for 30 minutes at room temperature and the tube (2) on the mounting-rotating device (8) of the soldering machine (3), and The lead wire wound on the solder holder 11 installed on the soldering device 6 is interposed in the gap between the cooling fin 1 and the tube 2 while rotating the tube 2 with the mounting-rotator 8. A process of soldering at a temperature of 250 ° C. ± 100 ° C. with the heater 19 via the through hole 18 of the soldering device 6 at a speed of 130 mm / min ± 50 mm, Air cooling the tube (2) integrated with the cooling-fin (1) passing through the soldering device (6) for 10 minutes; An aqueous solution in which the tube 2 integrated with the cooling fin 1 was added with 15 l of water to ₂ l of sulfuric acid (H ₂ SO ₄ ), 1 l of nitric acid (NHO ₃ ), and 100 g of sodium dichromate (Na ₂ Cr ₂ O ₇ ). Dipping the product for 20 minutes Cooling-fin and tube soldering method comprising a step of drying at room temperature for 30 minutes after the air shower (air shower) after washing in the washing tank after the dipping. In the construction of a soldering-only machine (3) which can be integrally fused and fixed by a soldering method by winding the cooling-fin (1) around the tube (2) and filling the gap with the lead wire (4); The soldering machine (3) is a soldering device (6) capable of reciprocating left and right by the conveying device (7) along the rail (12) installed in the main body (5), A lead wire supply device 10 comprising a solder holder 11 installed on the soldering device 6 and supplying a wound lead wire 4 wound into a gap between a cooling fin 1 and a tube 2; Mounted to the left and right of the main body 5, the mounting-rotating device (8) for driving the rotation after passing through the tube (2) wound around the cooling-pin (1), Cooling-fin and tube soldering, characterized in that it consists of several automatic pedestals (9) installed on the body (5) to prevent sagging of the tubes (2) mounted between the stationary-rotator (8). Device. The method of claim 2; The conveying device (7) is guided to the rail (12) and the guide roller (13) which is axially installed on the soldering device (6) to enable rolling motion; Cooling, characterized in that the pinion (16) geared to the rack gear (17) installed in the longitudinal direction inside the rail (12) is installed on the drive shaft (15) of the geared motor (14) capable of forward and reverse driving. -Pin and tube soldering device. The method of claim 2; The mounting-rotating device 8 is installed in the left and right ends of the main body 5, the drive shaft 20 and the idle shaft 21 as a bearing housing 22 and an adjustment mount 23, The drive shaft 20 is connected to the geared motor 24 and the chain coupling 25 and the line power 26 installed below the main body 5, the drive chain sprocket (axially installed on the line power 26) 27) and the driven chain sprocket 28 fixed to the end of the drive shaft 20 to be connected to each other by the chain 29, The idle shaft (21) is a cooling-pin and tube soldering device, characterized in that the left and right spacing can be adjusted by the adjustable screw (21a) on the adjustment mount (23). The method of claim 2; The automatic pedestal (9) connects and installs a bracket (33) having a roller (32) on the upper end of the piston (31) of the air cylinder (30) installed on the body (5) in a vertical direction. Cooling-pin and tube soldering device, characterized in that the two rollers (32) in a set to support the tube (2) so as not to sag from the bottom.

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