KR101794953B1 - Refrigerants pipe expanding apparatus and manufacturing method of refrigerants pipe using thereof - Google Patents

Abstract

The present invention relates to a cooling pipe expansion pipe system capable of fixing a cooling fin while forming a single pipe without connecting a cooling pipe constituting a cooling system by welding, and a cooling pipe expansion method using the same.
The cooling pipe extending pipe according to the present invention is characterized in that the cooling fin having the through hole is inserted and fixed while keeping the gap therebetween. A fixing unit for fixing the inserted cooling pipe inserted along the through hole of the cooling fin fixed to the jig; A power transmission unit for converting the rotational motion of the motor as a drive source into a linear reciprocating motion; Expanding means for expanding the inner diameter of the cooling pipe installed in the power transmission portion and fixed to the fixed portion while linearly reciprocating together with the power transmission portion to a predetermined outer diameter; An oil supply unit for supplying oil to the inside of the cooling pipe to prevent rupture and thermal deformation of the cooling pipe that is expanded when the expanding means is activated; And a control unit for controlling the driving of the fixing unit, the expansion means, and the oil supply unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling pipe expanding apparatus and a cooling pipe expanding method using the same,

The present invention relates to a cooling pipe expanding apparatus and a cooling pipe expanding method using the same, and more particularly, to a cooling pipe expanding method and a cooling pipe expanding method using the same, And a method of expanding a cooling pipe using the same.

Consumer appliances such as refrigerators, air conditioners, and water purifiers are provided with cooling systems for cooling. The conventional refrigeration system for household appliances includes a compressor for compressing gaseous refrigerant at a high temperature and a high pressure, a condenser for condensing high-temperature and high-pressure refrigerant gas discharged from the compressor, a low-temperature and low-pressure liquid And an evaporator in which the refrigerant absorbs the latent heat of evaporation to cool the evaporator.

In this cooling system, the cooling operation is performed while repeating the process of circulating the refrigerant from the evaporator through the condenser and the capillary to the evaporator by driving the compressor.

The condenser constituting the cooling system includes a cooling pipe through which the coolant flows and a cooling fin fitted to the outer circumferential surface of the cooling pipe to make the surface area in contact with the air as large as possible to enable rapid heat exchange.

The cooling pipe is made of a pipe having a predetermined inner diameter by using an aluminum alloy or the like having a high thermal conductivity, and is cut into a predetermined length and used.

The cooling fins to be assembled here are also formed into a thin plate shape using an aluminum alloy or the like having a high thermal conductivity and have a structure in which a through hole is opened so that the cooling pipe can be inserted.

In order to assemble the cooling fins in the cooling pipe, a plurality of cooling fins are firstly inserted into the jig at predetermined intervals and fixed in a row, and then the cooling fins are inserted into the cooling fins The cooling pipe is inserted along the through-hole of the pipe.

In order to fix the cooling fin inserted in the cooling pipe to the cooling pipe, a spreading ball is inserted into the cooling pipe, and when it is pulled from the front, the expansion pipe passes through the cooling pipe and the cooling pipe is expanded, The cooling fins are fixed while being in surface contact with the holes.

When a plurality of cooling pipes with a cooling fin in a fixed form are manufactured through the above operation, one end of the cooling pipe is cut into a predetermined length, and the other end is bent in a "U"

The cooling pipe made in such a unit length has one end in the form of a straight line and the other end in the form of a " U "shape. The cooling pipe is divided into a U- Insert the sleeve inside and connect it from outside by welding.

By connecting the plurality of cooling pipes to each other by welding in the same manner, the evaporator can be manufactured to have a predetermined size corresponding to the cooling capacity.

However, such a structure is disadvantageous in that when the cooling pipe is welded, the sleeve is welded with the sleeve inserted thereinto, so that when the refrigerant flows into the cooling pipe, resistance is received by the sleeve.

In addition, there is a possibility that the welded portion is leaked due to vibrations or shocks and the coolant may leak out.

In addition, since the conventional cooling pipe expansion apparatus has a structure in which the expansion pipe is expanded by inserting a expansion ball into the cooling pipe and pulling the expansion ball from the front side, it is inevitable to expand the cooling pipe only when the cooling pipe is in the form of a straight line.

After completion of the expansion work, one end is bent to a "U" shape and welded to another cooling pipe having the same structure, so that much work is required.

Korean Patent Publication No. 10-2009-0012574

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a cooling pipe expanding apparatus capable of fixing a cooling fin while forming a single pipe without connecting a cooling pipe by welding, And to provide a method for expanding the cooling pipe.

The cooling pipe expansion apparatus proposed by the present invention includes a jig having cooling fins having through holes formed therein so that they can be inserted and fixed while maintaining a gap therebetween. A fixing unit for fixing the inserted cooling pipe inserted along the through hole of the cooling fin fixed to the jig; A power transmission unit for converting the rotational motion of the motor as a drive source into a linear reciprocating motion; Expanding means for expanding the inner diameter of the cooling pipe installed in the power transmission portion and fixed to the fixed portion while linearly reciprocating together with the power transmission portion to a predetermined outer diameter; An oil supply unit for supplying oil to the inside of the cooling pipe to prevent rupture and thermal deformation of the cooling pipe that is expanded when the expanding means is activated; And a control unit for controlling the driving of the fixing unit, the expansion means, and the oil supply unit.

Wherein the fixing part is formed of two clamps which are arranged to face each other and linearly moved by the respective driving parts, one of the clamps is formed with a supporting groove in which one side of the cooling pipe is seated and supported, The clamp is formed with a projection for pressing and restraining the other side of the cooling pipe supported by the support groove.

The one of the clamps is provided with a cutting edge for cutting the end portion of the cooling pipe to a predetermined length while being driven by the driving force of the driving portion.

The power transmission unit includes a drive sprocket connected to a rotation axis of a motor configured to rotate forward and reverse and rotating forward and reverse, a driven sprocket for transmitting driving force of the drive sprocket, and a drive sprocket connected to the drive sprocket and the driven sprocket. A chain for converting the rotational motion of the chain into a linear reciprocating motion, and a first fixing bracket for transmitting the driving force of the chain to the expanding means.

And the expanding means includes a rod that linearly moves by the driving force of the power transmitting portion. And a guide tip coupled to a distal end of the rod and extending along the inner surface of the cooling pipe together with the rod to expand the inner diameter of the cooling pipe and a guide tip assembled at the distal end of the expansion ball.

The load is provided with a plurality of second fixing brackets so that a driving force of the power transmission portion is transmitted to the rod.

The guide and guide pins are formed with a passage through which oil can pass so that the oil in the oil supply unit can be supplied to the inside of the cooling pipe to be expanded. .

An air discharge hole is formed in the expansion ball to discharge the air inside the cooling pipe to the outside of the cooling pipe, and the rod and the expansion ball are assembled to be detachable by a screw fastening method on the guide tip.

The oil supply unit includes a check valve installed in an oil storage tank and an oil discharge pipe through which oil is discharged from the oil storage tank to guide the oil in only one direction while preventing backflow of oil, And an air compressor for applying pressure to supply the oil to the expanding means.

The air compressor and the expansion means are connected to each other through a connection pipe. A solenoid valve is installed at an end of the connection pipe so as to intermittently supply the compressed air supplied by the expansion means at a predetermined interval.

The expansion means is configured to be operated after a predetermined time has elapsed after the oil supply portion is operated under the control of the control portion.

The present invention also provides a method of manufacturing a semiconductor device, comprising: a step of aligning and fixing cooling fins having fixing holes in a plurality of rows by inserting the cooling fins into insertion grooves of a jig provided with a plurality of rows; A step of bending an intermediate portion of the cooling pipe fitted in the cooling fin fixing holes of each of the columns in a "U" shape; And an expanding step of expanding the cooling pipe to a predetermined outer diameter by moving the expanding means along the inner surface of the cooling pipe.

An oil supply process is further performed inside the cooling pipe in order to prevent rupture and thermal deformation of the cooling pipe that is expanded during the expansion process.

After the bending process, a cutting process is further performed to cut the end portions of the cooling pipes in order to align both ends of the cooling pipe with a predetermined length.

The cooling pipe expansion pipe according to the present invention and the cooling pipe expansion method using the cooling pipe extension method according to the present invention are characterized in that a cooling fin is inserted into a cooling fin in a state in which a middle portion of a cooling pipe constituting one evaporator is bent in a & Since the cooling fins can be fixed, the cooling pipe can be manufactured without welding.

For this reason, all of the defects due to welding can be eliminated, and a high-quality cooling system can be manufactured.

In addition, since the middle portion of the cooling pipe can be first bent in the "U " shape, and the expanding operation can be simultaneously performed at both ends of the bent cooling pipe, the time for expanding the cooling pipe can be shortened. In addition, when the cooling pipe is expanded, the oil can be intermittently injected into the cooling pipe to prevent the excessive supply of oil, and the air trapped in the unexpanded cooling pipe can be smoothly discharged.

1 is a front view of a cooling pipe expansion apparatus according to the present invention.
2 is a plan view of a cooling pipe expansion piping according to the present invention.
3 is a perspective view for explaining a jig provided in a cooling pipe expansion pipe according to the present invention.
4 is a view for explaining a fixing part provided in a cooling pipe expansion pipe according to the present invention.
5 is a partial cross-sectional view for explaining the expanding means provided in the cooling pipe expanding apparatus according to the present invention.
6 is a view showing an oil supply portion provided in a cooling pipe expansion pipe according to the present invention.
FIG. 7 is a perspective view of a cooling pipe extending apparatus according to the present invention in which a cooling pipe is inserted into a cooling fin. FIG.
8 is an enlarged cross-sectional view showing the expansion of the cooling pipe using the cooling pipe expansion pipe according to the present invention.
9 is a view for explaining operation of the expanding means of the cooling pipe expansion pipe system according to the present invention.

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

FIG. 1 is a front view of a cooling pipe expansion apparatus according to the present invention, and FIG. 2 is a plan view of a cooling pipe expansion apparatus according to the present invention.

As shown in the drawings, the cooling pipe expansion apparatus according to the present invention includes a jig 2 having a cooling fin F to which a cooling pipe P to be expanded is inserted, , A fixing part (4) for fixing the cooling pipe (P) to be expanded, which is inserted along the through hole of the cooling fin (F) fixed to the motor (6) An expanding means for expanding the cooling pipe (P) fixed to the fixing portion (4) to a predetermined outer diameter while linearly reciprocating by driving the power transmission portion, and a cooling pipe An oil supply portion 8 for supplying oil to the inside of the cooling pipe in order to prevent rupture and thermal deformation of the pipe P and a control portion for controlling the driving of the fixing portion 4 and the expansion means and the oil supply portion 8 10).

The jig 2, the fixing portion 4, the expansion means, the oil supply portion 8 and the control portion 10 constituting the cooling pipe expansion pipe set are fixed to the frame 12 or installed do.

The frame 12 is provided with various switches 14 for operating and stopping the expansion pipe of the present invention. The switch 14 may be a button or a panel.

The cooling fins F are formed in a substantially rectangular shape and one or more than two through holes H are formed so that the cooling pipes P can be inserted. And the cooling pipe F can be fixed to the cooling pipe P with respect to the cooling pipe P.

The shape of the cooling fin F may be a rectangle or a square. The shape of the cooling fin F is not limited thereto. For example, the cooling fin F may have various shapes such as a polygon.

3, the jig 2 is formed with an insertion groove 16 in a vertical direction while being spaced apart from each other along the longitudinal direction. The cooling fins F are inserted into the insertion groove 16, . The jig 2 is fixedly installed on the frame 12 in a spaced-apart relationship.

The operation of inserting the cooling fins F into the jig 2 in a line can be performed by the cooling fin inserting apparatus of the applicant's patent No. 0960243, and thus a detailed description thereof will be omitted.

At this time, the cooling pin (F) is installed in a module unit in a certain interval maintaining the interval, and the module is inserted in a continuously repeated section in which a certain section is not installed. As will be described in detail later, the starting end and the end portion of the cooling pipe P whose middle portion is bent in the form of the U-shape are inserted into the through hole H of the cooling fin F and the cooling pipe P is extended And then the cooling pipe P in a section where the cooling fin F is not installed is bent in a predetermined shape so that the cooling fin can be fixed while forming the cooling pipe as a single pipe without welding.

4 shows the fixing part 4 in which the fixing part 4 is provided so as to be opposed to the upper and lower sides and includes an upper clamp 22 and a lower part 22 which are linearly moved by the respective driving parts 18 and 20, And a clamp 24.

The driving units 18 and 20 may be cylinders or the like and the upper and lower clamps 22 and 24 may be brought close to each other or vice versa by driving the driving units 18 and 20, (P) can be fixed or released.

The lower clamp 24 is formed with a support groove 26 in which a side surface of the cooling pipe P is seated and supported and the upper clamp 22 is provided with a cooling pipe P supported on the support groove 26, A projection 28 for pressing and restraining the projection lens 28 with a predetermined pressing force is formed.

The support groove 26 is formed by a downward inclined surface which gradually narrows down from the upper portion toward the lower portion. Accordingly, the cooling pipe P can be restrained by the upper clamp 22 in a state where the cooling pipe P is stably mounted on the lower clamp 24.

A cutting blade 30 is provided outside the upper clamp 22 for cutting the end of the cooling pipe P to a predetermined length while being driven by the driving force of the driving unit 18. [

When the switch 14 is operated in a state where the cooling pipe P is seated in the support groove 26, the fixing portion 4 is moved to the upper and lower clamps 22 and 24 while the driving portions 18 and 20 are driven The cooling pipe P is restrained and fixed therebetween.

When the switch for operating the cutter blade 30 is pressed in the switch 14, the cutter blade 30 is linearly moved by the driving of the drive unit 18 and the end of the cooling pipe P fixed to the fixing unit 4 is fixed Cut to length.

The fixing part 4 is configured to fix a plurality of cooling pipes P at a time and the cutting blade 30 is also configured to cut a plurality of cooling pipes P at a time .

The power transmitting portion for driving the expanding means includes a motor 6 configured to be capable of forward rotation and reverse rotation, a drive sprocket 32 connected to the rotation shaft of the motor 6 for forward rotation and reverse rotation, A chain 36 connected to the drive sprocket 32 and the driven sprocket 34 to convert the rotational motion of the drive sprocket 32 into a linear reciprocating motion, And a first fixing bracket (38) installed on the chain (36) for transmitting the driving force of the chain (36) to the expanding means.

The rotation of the motor 6 is rotated forward until the rod 42 constituting the expanding means, which will be described in detail later, advances by a predetermined length. At this time, when the rod is advanced by the predetermined length by the detection sensor The signal of the sensor is transmitted to the control unit 10 and the rotation direction of the motor 6 is reversely reversed by the control of the control unit 10 so that the expansion means including the rod 42 is retracted and returned.

Accordingly, the expansion means is advanced and retreated by forward rotation and reverse rotation of the motor 6, so that the cooling pipe P is constantly expanded to a predetermined length and then returned to the initial position.

A first fixing bracket 38 for transmitting the drive force of the chain to the expanding means is provided at a predetermined interval in the chain 36 so that the first fixing bracket 38 can linearly move while the chain 36 linearly moves The first fixing bracket 38 allows the expanding means to be driven.

The first fixing bracket 38 is configured to be movable in a linear direction along a rail 40 installed along both longitudinal directions.

Fig. 5 is a view for explaining the expanding means. The expanding means of the present invention includes a rod 42 that linearly moves by the driving force of the power transmitting portion. A expansion bulb 44 coupled to the distal end of the rod 42 to expand the inner diameter of the cooling pipe while advancing along the inner surface of the cooling pipe P together with the rod, And a guide tip 46.

A plurality of second fixing brackets 48 are fixed to the rod 42 so that a driving force of the power transmitting portion is transmitted to the rod 42. The second fixing bracket 48 is configured to be able to move in a linear direction along the rails 50 provided along both longitudinal directions.

The second fixing bracket 48 and the first fixing bracket 38 are spaced apart from each other with the same interval being maintained between the first fixing bracket 38 and the second fixing bracket 38, Is linearly moved by a force pushing the second fixing bracket 48. [

The second fixing bracket 48 is provided with a vibration absorbing pad capable of absorbing an impact so that the first fixing bracket 38 can move while absorbing an impact caused by collision with the second fixing bracket 48 .

After the rod 42 advances and the expansion operation is completed, the rod 42 is retracted again so that the first fixing bracket 38 and the second fixing bracket 48 can be positioned at a predetermined interval as in the initial state A gap retaining rod is provided between the second fixing brackets (48).

The inner diameter of the cooling pipe P can be enlarged by moving the expansion bulb 44 and the guide tip 46 together by the linear movement of the rod 42. At this time, Oil passages 52 and 54 are formed in the rod 42 and the expansion ball 44 so that oil can be supplied to the guide pin 46. The guide tip 46 is connected to the oil passages 52 and 54 An oil discharge hole 56 for discharging the oil supplied to the front side of the expansion ball 44 is formed.

The rod 42 and the expansion ball 44 are constructed so that they can be removably assembled to the guide tip 46 by a screw fastening method. For this purpose, a male screw is formed on the outer circumferential surface of the guide tip 46, And a corresponding female threaded portion is formed on the inner side surface of the expansion bulb 44. [

The tip portion of the guide tip 46 is formed as a tapered surface and serves as a guide when the expansion bulb 44 moves and expands along the inside of the cooling pipe P. [

An air vent hole 58 formed in a groove shape along the front end portion and the rear end portion of the expansion bulb 44 and the inner wall of the inner central portion is formed to allow the air inside the cooling pipe P to be expanded to the outside of the cooling pipe have.

Accordingly, even if the middle portion of the cooling pipe P is bent in a U-shape and then both the free ends of the cooling pipe P are expanded at the same time, the air inside the cooling pipe P flows into the air discharge hole 58 to the outside of the cooling pipe (P).

6 is a view for explaining the oil supply unit 8. The oil supply unit 8 is provided in the oil storage tank 60 and the oil discharge pipe 62 through which the oil in the oil storage tank 60 is discharged A check valve 64 for guiding the oil to flow only in one direction while preventing reverse flow of oil and an air compressor 66 for forcibly feeding oil to the expanding means by applying pressure to the oil passed through the check valve 64 .

The oil discharged from the oil storage tank 60 is configured to be supplied or shut off to the expansion means by the main solenoid valve 70 and the distribution solenoid valve 71 which are driven under the control of the control unit 10. [

The main solenoid valve 70 serves to supply and shut off the oil supplied to the expanding means and the solenoid valve 71 for distributing serves to supply the compressed air supplied to each of the expanding means expanding the respective pipes P As shown in FIG.

The air compressor 66 and each expansion means are connected to each other through a connection line 68 and the distribution solenoid valve 71 is connected to the expansion means through the air compressor 66 at a predetermined time interval And can be supplied intermittently.

Therefore, when the expanding operation of the cooling pipe P proceeds through the expanding means, the oil can be injected with the force of the compressed air at predetermined time intervals. The injection interval of the oil can be configured, for example, by spraying twice per second, so that sufficient oil can be injected when the cooling pipe (P) is expanded. In addition, when the oil is intermittently sprayed in this way, excessive supply of oil can be prevented while the rod 42, the expansion ball 44, and the guide tip 46 are inserted into the cooling pipe P bent in the U- The air trapped in the cooling pipe that has not been expanded at the time when the oil is not sprayed flows through the air discharge hole 58 formed in the expansion ball 44 to smoothly discharge .

After the oil is first supplied to the cooling pipe P, a predetermined time has elapsed under the control of the control unit 10, and then the expanding means can be operated.

The oil supply portion 8 may be fixed to the chain 36 so as to move with the expanding means.

Reference numeral 72, which is not described in the drawing, is a cooling fin inserting device of the applicant's patent No. 0960243, and reference numeral 74 denotes a fastening portion.

In order to expand the cooling pipe by using the cooling pipe expansion apparatus of the present invention as described above, first, the cooling pipe is inserted into the insertion groove 16 formed along the longitudinal direction of the jig 2, as shown in FIG. 3, ), And fix the cooling fins (F) in a row.

This operation can be performed by inserting cooling fins F into a plurality of jigs at the same time and inserting cooling fins into a plurality of jigs in a row.

At this time, the cooling pin (F) is installed in a module unit for a predetermined period, and a section in which a certain section is not installed is continuously inserted repeatedly.

The cooling pipe P is prepared through a separate process from that described above. At this time, the cooling pipe P is prepared by a separate process as shown in FIG. 7, in which the middle portion is bent in a "U & This cooling pipe P is inserted into the through hole H of the cooling fin F assembled to the jig 2 with both free ends thereof inserted therein.

In this state, the switch 14 is operated so that the upper and lower clamps 22 and 24 are brought close to each other by driving each of the driving units 18 and 20 while the cooling pipe 22 is inserted into the support groove 26 of the lower clamp 24, The projection P is inserted and the projection 28 of the upper clamp 22 is pressed to fix the cooling pipe P to the fixing part 4. [

In this state, when the switch 14 is operated to drive the driving unit 18, the cutting edge 30 located on the outer side of the upper clamp 22 is lowered and the free end of the cooling pipe P is cut into a certain length . When the cutting operation is completed, the cutting edge 30 is raised to its original position by the driving of the driving unit 18. [

Then, after confirming that the cutting has proceeded normally, the rod 42 is manually advanced forward to enlarge the cooling pipe P so that the expansion ball 44 mounted on the tip of the rod 42 enters the cooling pipe P to be expanded .

When the movable switch 14 is operated in this state, the main solenoid valve 70 is opened under the control of the control unit 10 to discharge the oil from the oil storage tank 60 and the check valve 64 and then stored in the oil discharge pipe 62. [

At this time, the air compressor (66) and the solenoid valve for distribution (71) are also operated to pressurize the oil in the oil discharge line (62) and transfer the oil together with the compressed air to the expanding means by the force of the compressed air.

The oil to be transferred travels along the oil passage 52 and 54 formed in the rod 42 and the expansion ball 44 and then flows into the oil discharge hole 56 at the tip end of the guide tip 46 located on the front side of the expansion ball 44, Lt; / RTI >

In this operation, since the distribution solenoid valve 71 is repeatedly opened or closed at predetermined time intervals to supply the compressed air at predetermined time intervals, the oil discharged from the oil discharge pipe line 62 is also supplied at a predetermined time interval And is injected into the cooling pipe (P) to be expanded together with compressed air. The oil injection interval can be continuously injected twice per second.

The motor 6 is driven under the control of the control unit 10 when a certain time (about 2 seconds) elapses after the oil is injected into the cooling pipe P as described above.

The driving sprocket 32 is rotated by the driving of the motor 6 and at the same time the chain 36 is linearly moved together to linearly move the first fixing bracket 38 at the rear end in one direction. When the first fixing bracket 38 linearly moves, the other first fixing bracket on the front side thereof is put in place, and the first fixing bracket 38 on the rear end is moved so that the second fixing bracket 48 The second fixing bracket 48 at the rear end is also moved by the force so that the rod 42 moves forward as well.

At this time, when the second fixing bracket 48 at the rear end moves, the other second fixing bracket at the front side is in place.

When the first fixing bracket 38 and the second fixing bracket 48 at the rear end move together and the second fixing bracket 48 contacts the next first fixing bracket 38 in front of the first fixing bracket 38 and the second fixing bracket 48, When the first fixing bracket 38 moves together and comes into contact with the second fixing bracket 48 on the front side thereof, the rod 42 is moved in such a manner as to advance the rod 42 (see FIG. 9).

That is, the first fixed bracket 38 moves along with the rectilinear movement of the chain 36 by driving the motor 6 so that the second fixed bracket 48 is sequentially advanced, The first fixing bracket 38 and the second fixing bracket 48 are moved as much as the forward length of the rod 42 is. At this time, the second fixing bracket 48 serves as a guide for preventing deformation of the rod 42 and maintaining a straight line state.

As a result of this operation, the rod 42 advances forward, and the expansion bulb 44 coupled to the distal end of the rod 42 advances to expand the cooling pipe P as shown in FIG.

As the cooling pipe P is expanded by this enlarging operation, the outer diameter of the cooling pipe P is expanded and the through hole H of the cooling fin F is in surface contact so that the cooling pin F is attached to the cooling pipe P .

At this time, since the middle portion of the cooling pipe (P) is bent in the shape of "U", the expanding operation can be performed at both free ends at the same time. And is discharged to the rear side of the cooling pipe P that has been expanded through the hole 58.

When the rod 42 and the expansion ball 44 advance by a predetermined distance and the expansion work of the cooling pipe P is completed by this operation, a sensor (not shown) senses the advancing length of the rod 42, And stops the operation of the air compressor 66 of the oil supply unit 8 under the control of the control unit 10 to stop the supply of the oil and at the same time the control unit 10 controls the motor 6 ) In the reverse direction.

As a result of this action, the chain 36 moves linearly in the opposite direction and moves to the original position, and the expanding means including the first and second fixing brackets 38 and 48 and the rod 42 are also retracted.

When the cooling fins F are installed outside the cooling pipe P in module units for a predetermined interval and the sections where the cooling fins F are not installed for a certain period are continuously repeatedly formed, It is possible to constitute the cooling system by bending the cooling pipe P in a predetermined section in a predetermined shape.

While the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

2: Jig 4: Fixed part
6: motor 8: oil supply part
10: control unit 12: frame
14: switch 16: insertion groove
18, 20: driving part 22: upper clamp
24: Lower clamp 26: Support groove
28: projection 30: cutting edge
32: drive sprocket 34: driven sprocket
36: chain 38: first fixing bracket
40, 50: rail 42: rod
44: Zoom out 46: Guide tip
48: second fixing bracket 52, 54:
56: Oil discharge hole 58: Air discharge hole
60: Oil storage tank 62: Oil discharge pipe
64: Check valve 66: Air compressor
68: connection channel 70: main solenoid valve
71: Solenoid valve for distribution
72: cooling fin inserting device 74: fastening part

Claims (17)

A jig having a through-hole formed therein so that a cooling fin can be inserted and fixed while maintaining a gap therebetween;
A fixing unit inserted along both of the through holes of the cooling fins fixed to the jig, the fixing part fixing the expanding cooling pipe whose middle portions are bent in the shape of "U" and whose both ends are free ends;
A power transmission unit for converting the rotational motion of the motor as a drive source into a linear reciprocating motion;
Expanding means for expanding the inner diameter of the cooling pipe installed in the power transmission portion and fixed to the fixed portion while linearly reciprocating together with the power transmission portion to a predetermined outer diameter;
An oil supply unit for supplying oil to the inside of the cooling pipe to prevent rupture and thermal deformation of the cooling pipe that is expanded when the expanding means is activated;
A control unit for controlling the driving of the fixing unit, the expansion means, and the oil supply unit;
Lt; / RTI >
The expansion means includes two rods that linearly move by the driving force of the power transmission portion. Two expansion balls coupled to the distal ends of the rods and advancing together with the rods while simultaneously expanding the inside diameters of the pipes at both sides of the cooling pipes and two guide tips assembled to the distal ends of the expansion balls,
Wherein each of the rod and each of the expansion balls is provided with a flow passage through which oil can pass so that the oil in the oil supply section can be supplied to the inside of the cooling pipe to be expanded, An oil discharge hole for discharging the oil to the cooling pipe to be expanded,
An air discharge hole having a groove shape for discharging the air in the cooling pipe that has not been expanded as the expansion is progressed to the rear end side of the cooling pipe having been expanded,
The expansion means is configured to be operated after a predetermined time has elapsed after the oil supply portion is operated under the control of the control portion,
The oil supply unit includes a check valve installed in an oil storage tank and an oil discharge pipe through which oil is discharged from the oil storage tank to guide the oil to flow only in one direction while preventing reverse flow of oil, And an air compressor for applying pressure to the inside of the cooling pipe to be expanded,
The oil supplied to the inside of the cooling pipe to be expanded through the oil supply unit is supplied to the cooling solenoid valve by the solenoid valve for distribution which is controlled by the control unit so as to repeatedly supply and shut off the compressed air of the air compressor, Pipe expanding system. The method according to claim 1,
The fixing part is constituted by two clamps which are installed so as to be opposed to each other and linearly moved by the respective driving parts. One clamp has a support groove in which one side of the cooling pipe is seated and supported, and the other clamp Is provided with a protrusion for pressing and restraining the other side surface of the cooling pipe supported by the support groove. The method of claim 2,
Wherein one of the two clamps is provided with a cutting blade for cutting the end of the cooling pipe to a predetermined length while being driven by the driving force of the driving unit. The method according to claim 1,
The power transmission unit includes a drive sprocket connected to a rotation axis of a motor configured to rotate forward and reverse and rotating forward and reverse, a driven sprocket for transmitting driving force of the drive sprocket, and a drive sprocket connected to the drive sprocket and the driven sprocket. And a first fixing bracket for transmitting the driving force of the chain to the expanding means. delete The method according to claim 1,
And a plurality of second fixing brackets are fixed to the rod so that a driving force of the power transmission portion is transmitted to the rod. delete delete The method according to claim 1,
Wherein the rod and the expansion ball are assembled in a detachable manner by a screw fastening method on the guide tip. The method according to claim 1,
And the tip end of the guide tip is made of a tapered surface. delete delete delete delete delete delete delete

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