KR101579807B1 - Tube Expanding Apparatus and Tube Expanding Method - Google Patents

Tube Expanding Apparatus and Tube Expanding Method Download PDF

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Publication number
KR101579807B1
KR101579807B1 KR1020150123075A KR20150123075A KR101579807B1 KR 101579807 B1 KR101579807 B1 KR 101579807B1 KR 1020150123075 A KR1020150123075 A KR 1020150123075A KR 20150123075 A KR20150123075 A KR 20150123075A KR 101579807 B1 KR101579807 B1 KR 101579807B1
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KR
South Korea
Prior art keywords
tube
connector
expanding
pin
main body
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KR1020150123075A
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Korean (ko)
Inventor
엄운섭
한창훈
이동규
이도영
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주식회사 기원
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Priority to KR1020150123075A priority Critical patent/KR101579807B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/045—Closing or sealing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

The present invention relates to a tube expanding apparatus and a tube expanding method. The present invention provides the tube expanding apparatus comprising: a main body; a pin jig installed in an upper surface of the main body having pin insertion grooves formed for pins having tube insertion holes to be inserted as being equally spaced; a first connector and a second connector installed to be detachable at an entrance port and an exit port of a tube, under a state which the tube is inserted into the tube insertion hole of the pin; an expanded tube fluid supply unit which supplies water to the tube through the first connector or the second connector; and a cleaning gas supply unit which supplies air to remove, clean, and dry residual water to the tube through the first connector or the second connector, and the expanding method using the expanding apparatus. As such, tube expanding is performed without collapse of an inner pin, thus an efficiency thereof is highly increased; concerns about a leakage due to welding exclusion are diminished for tubes of various shapes and not for a linear shape; and the apparatus has an effect of improving workability by not performing component replacement, cleaning, drying, and etc.

Description

[0001] The present invention relates to a tube expanding apparatus and a tube expanding method,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an expanding device and an expanding method, and more particularly, to a method of expanding a tube used for manufacturing a fin-tube type heat exchanger to a fluid pressure without damaging the inner fin And to a method and a device.

Generally, a refrigerator or a refrigerating device such as a refrigerated display case is provided with a heat exchanger such as an evaporator. The heat exchanger is manufactured by the following two methods.

As a first method, a tube expanding device including two straight tube, a plurality of plate pins each having two holes, and a tube extension ball attached to one end of the wire and wire are prepared. Next, the two tubes are inserted through the respective holes of the respective plate pins to arrange the plate pins in parallel within a plurality of groups of pins spaced on the tube in the longitudinal direction.

Next, the wire of the tube extender is pressed and extended through the tube, and inserted at the other end to firmly fit the plate pin of each pin group around the tube. The two tubes are welded to each other at one end, which is the opposite end of the U-shaped bend, and the two tubes are connected to each other by the bend, thereby manufacturing the tube with the fin for the heat exchanger.

The tubes thus manufactured are bent in a zigzag fashion as a whole in a portion having no pin group (non-batch section), thereby manufacturing a heat exchanger.

On the other hand, researches for the use of a hydrocarbon refrigerant, which destroys the ozone layer and reduces the influence on global warming in refrigerator, freezer display case, or similar refrigerating apparatus as a substitute refrigerant for a glow fluorocarbon refrigerant, Since such a hydrocarbon refrigerant is flammable, there is a need to suppress its leakage as much as possible.

However, when the heat exchanger is manufactured by the above-described first method, since the tube with the fin is welded to the U-shaped bent portion, it can have a gap, so that it is likely to leak into such a gap.

Further, in the case of providing a tube having inner fins, that is, a fin extending in the longitudinal direction on the inner surface of the tube for improving the refrigerating efficiency, there is a fear that the expanding ball may collapse the inner pin, And damaging the refrigerating performance. In addition, it is difficult to expand the tubes of various shapes, such as the U-shaped tube or the S-shaped tube, which are not linear.

In addition, in the case of the first method, since the expanding ball or the tip is used for forced expansion, it is necessary to periodically replace the expansion-related parts, thereby increasing the expense due to expansion and preventing the bending and rupture inside the tube (Toxic hazardous substances) to the inside of the tube, it is necessary to wash and dry the tube. As the number of work is increased, the number of workers is also increased and the workability of the tube is lowered.

A second method of manufacturing the heat exchanger will be described below.

First, a tube extender comprising a hairpin tube, a plurality of plate pins each having two spaced apart holes, a pressure rod and an expanding mandrel are prepared.

Next, in the hairpin tube, the two straight tube portions are inserted through the respective holes of the respective plate pins and arranged in parallel. The tube is then expanded as a mandrel of the tube extender and pressurized from the open end of the hairpin into the straight tube to securely fit the plate pin, thereby producing a tube with a fin for the heat exchanger.

Next, the tube with pins is bent in a zigzag fashion as a whole in a portion not having a pin group, thereby manufacturing a heat exchanger.

However, when the heat exchanger is manufactured by the above-described second method, the expansion mandrel also tends to collapse the inner fin when the inner fin is extended in the longitudinal direction inside the tube to improve the refrigerating efficiency. Resulting in increased resistance to flow and impaired refrigeration performance.

That is, in the case of a tube having an inner fin, that is, an inner pin extending in the longitudinal direction for the purpose of improving the refrigerating efficiency, there is a fear that the expanding mandrel may collapse the inner pin, so that an increased resistance to the flow of refrigerant and an impaired refrigerating performance And it is difficult to expand tubes having various shapes other than the straight shape, for example, a tube having a curvature such as a U-shaped tube or an S-shaped tube.

In addition, in the case of the second method, since the expanding mandrel is forcibly expanded, it is necessary to periodically replace the expansion-related parts, thereby increasing the expense due to expansion. In order to prevent bending and rupture inside the tube (Toxic hazardous substances) to the inside of the tube, it is necessary to wash and dry the tube. As the number of work is increased, the number of workers is also increased and the workability is lowered.

It is an object of the present invention to provide an expanding device and an expanding method capable of expanding processing without causing collapse of the inner pin by making the expanding pipe made of fluid pressure.

In addition, the embodiment of the present invention allows the tube to be expanded to various types of tubes, such as a U-shaped tube or an S-shaped tube, In order to provide a tube expanding device and a tube expanding method for expanding a tube having various curved shapes as in the conventional art, there is no need to weld after completing a plurality of tubes to eliminate the concern of leakage due to suppression of crevice generation There is a purpose.

It is also an object of the present invention to provide an expanding apparatus and method for eliminating an increase in cost due to replacement of components due to the elimination of separate expansion related components for expansion.

Further, according to the present invention, since the fluid is expanded by the pressure of the fluid and the inside of the tube is cleaned with the cleaning gas (air pressure), it is not necessary to use a separate expansion oil (toxic hazardous substance) The present invention is also directed to an apparatus and method for expanding a workpiece with a greatly improved workability by reducing the number of workings and thereby reducing the number of workers.

The problems to be solved are not limited thereto, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided an apparatus comprising: a device body having an elongated base frame; A fin jig disposed on the base frame of the apparatus main body and having pin insertion grooves into which pins (single or plural pin groups) of heat exchangers having tube insertion holes are inserted; A first connector detachably installed at an inlet end and an outlet end of an aluminum (Al) tube inserted into a tube insertion hole of the pins supported by the pin jig, respectively, and configured to open and close the inlet and outlet ends of the tube, A second connector; A condensing fluid supply means for injecting water into the tube through the first connector or the second connector at a high pressure (90 kg / cm 2 or more) to expand the tube to the water pressure; A pressing means for preventing the tube from being damaged by the expansion phenomenon by pressing the non-arrangement section where the fins are not located in the tube when the water is injected into the tube, thereby restricting the expansion of the tube; And a cleaning gas supply means for cleaning the inside of the tube by injecting a cleaning gas (preferably, air) into the tube through the first connector or the second connector can be provided.

Here, the pin insertion grooves constitute a pin support portion for supporting the pins. In order to expand the tube, other liquid or gas, or a mixture of liquid and gas, may be used instead of water. When a liquid is used as the expanding fluid, the cleaning gas also serves to remove residual liquid in the tube and dry it.

The diameter of the tube insertion hole in the fin is preferably larger than the diameter of the tube.

The pressing means includes a link portion rotated with respect to the main body; And a plurality of pressurizing portions for pressing a portion (non-disposition section) where the pins are not positioned in the tube while being lifted and lowered relative to the link portion.

In the case of supplying water (expanding fluid) to the tube through the first connector or the second connector at a high pressure, it is preferable that another connector to which no water is supplied is closed. When the cleaning gas (air) is supplied into the tube through the first connector or the second connector, it is preferable that the other connector to which the cleaning gas is not supplied is opened.

A connector connected to the expanded fluid supply means and the cleaning gas supply means among the first connector and the second connector and another connector which is not connected to the expanded fluid supply means and the cleaning gas supply means, May be provided on opposite sides of the main body.

Alternatively, the first connector and the second connector may be provided so as to be parallel to each other in either direction with respect to the main body.

Or one of the first connector and the second connector, which is connected to the expanding fluid supply means and the cleaning gas supply means, and another connector which is not connected to the expanded fluid supply means and the cleaning gas supply means (Another connector: a third connector) which is provided on the opposite side to the main body, and which is not connected to the expanding fluid supply means and the cleaning gas supply means, And may be provided in parallel with one connector (the first connector or the second connector) in one direction.

According to another aspect of the present invention, there is provided a method of expanding a tube using an expanding apparatus, comprising: (a) sequentially inserting fins having through holes formed in insertion grooves of a pin jig; (b) inserting a tube into the insertion hole of the pin; (c) installing the first connector at the inlet end of the tube and installing the second connector at the outlet end of the tube; (d) after the first connector or the second connector is closed, the expanding fluid supply means supplies water into the tube through the unclosed second connector or the first connector, and the tube expands by the water pressure, So that the pins are engaged with the circumference of the tube; (e) after the closed connector of the first connector or the second connector is opened, the cleaning gas supply means supplies air into the tube through the non-closed second connector or the first connector, Removing the residual water, washing and drying the residual water.

In this case, in the step (a), it is preferable that the pins are inserted into the insertion grooves of the pin jig while repeating the process of inserting the pins at a predetermined interval and not inserting the pins at regular intervals.

It is preferable that the method further comprises a step of pressing a portion of the tube where the pin is not positioned, as a pressing means, with a predetermined force after the step (b) or (c).

Means for solving the problems will be more specifically and clarified through the embodiments, drawings, and the like described below. In addition, various solution means other than the above-mentioned solution means may be further proposed.

As described above, according to the water pipe expansion device and method according to the present invention, the expansion is performed by the pressure of the fluid (water pressure), whereby the expansion is performed without collapsing the inner pin, and the efficiency is greatly increased .

In addition, since the present invention is expanded by the fluid pressure, it is possible to easily expand the tubes of various shapes other than the straight type, for example, the U-shaped tube or the bent tube such as the S-shaped tube. In order to expand the tubes having various shapes with curvature, it is also possible to eliminate the fear of leakage due to the suppression of crevices due to no need to weld after expanding the tubes.

The present invention also provides the effect of eliminating the cost increase due to the replacement of components due to the elimination of separate expansion related components for expansion.

In addition, since the present invention is expanded by the pressure of the fluid and the inside of the tube is cleaned by the pressure of the cleaning gas, it is not necessary to use a separate expansion oil (toxic hazardous substance) As a result, work efficiency is greatly improved as the number of working hours is reduced and the number of working people is reduced as much as possible.

1 is a front view of an expansion device according to the present invention;
2 is a plan view of an expansion device according to the present invention;
Fig. 3 is a side view of the expansion device according to the present invention, Fig. 3a is a view showing a state in which a pressurizing portion is opened, and Fig. 3b is a view showing a state in which a pressurizing portion is rotated to press a pin jig.
4 is a perspective view of a pin jig applied to an expanding device according to the present invention;
FIG. 5A is a perspective view of the pin jig shown in FIG. 4 in which a pin and a tube are inserted, FIG. 5A is a view showing a state where the pin is inserted into the insertion groove of the pin jig, Drawings in the inserted state.
FIG. 6 is a view showing a state in which the pressing means is pressed against a portion where the pin is not positioned in FIG. 5B; FIG.
7 (a) is a view showing a state in which a pin is fitted around the outer surface of a single straight tube, (b) is a view showing a state where a pin is fitted around the outer periphery of the tube And Fig. 8 (c) is a view showing a state in which a pin is fitted around an outer surface of a U-shaped tube.
8 is a perspective view of a completed state after a tube is inserted into the insertion hole of the fin and the tube is expanded.
9 is a cross-sectional view showing an internal view of a tube having been expanded.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. For a better understanding of the invention, it is to be understood that the size of elements and the thickness of lines may be exaggerated for clarity of understanding. Further, the terms used to describe the embodiments of the present invention are mainly defined in consideration of the functions of the present invention, and thus may be changed depending on the intentions and customs of the user and the operator. Therefore, the terminology should be interpreted based on the contents of the present specification throughout.

FIG. 1 is a front view of an expansion device according to the present invention, FIG. 2 is a plan view of an expansion device according to the present invention, FIG. 3 is a side view of an expansion device according to the present invention, And Fig. 3B is a view showing a state in which the pressing portion is rotated to press the pin jig.

5 is a perspective view showing a state where a pin and a tube are inserted into the pin jig of Fig. 4. Fig. 5a is a perspective view of the pin jig shown in Fig. FIG. 5B is a view showing a state in which a tube is inserted into an insertion hole of a pin. FIG. FIG. 6 is a view showing a state in which the pressing means is pressed against a portion where the pin is not positioned in FIG. 4B. FIG.

7 (a) to 7 (c) are views showing a state in which the tube is expanded so that the pin is fitted around the outer surface of the tube, and Fig. 8 is a cross- And FIG. 9 is a cross-sectional view showing an inner appearance of the tube having been expanded.

1 to 3B, an expansion device according to the present invention includes a main body 10 installed on a floor surface of a factory or the like, and a main body 10 installed on the upper surface of the main body 10 in the longitudinal direction, And a pin jig 20 in which pin insertion grooves 22 for inserting the pins 80 formed with the insertion holes 82 at equal intervals are formed.

4, the pin jig 20 is installed horizontally on the upper surface of the main body 10 so that the pin jig 20 is inserted horizontally into the main body 10, (22) are formed.

Here, the reference numeral 24, which is not described in the drawing, is formed so as to correspond to a part of the tube insertion hole 82 of the pin 80 in a state where the pin 80 is inserted into the pin insertion groove 22, 30 to be inserted.

The tube expanding apparatus according to the present invention is detachably installed at the inlet end and the outlet end of the tube 30 in a state where the tube 30 is inserted into the tube insertion hole 82 of the pin 80 And further includes a first connector (40) and a second connector (50).

Here, the first connector 40 is formed with an insertion port into which the inlet end of the tube 30 is inserted and an opening / closing port through which water or air is allowed to pass. The opening / closing port is opened / closed by an opening / closing valve Thereby opening and closing.

The second connector 50 is formed with an insertion port for receiving the outlet end of the tube 30 and an opening and closing port for opening or closing water or air so that the opening and closing port is also opened by an opening and closing valve Thereby opening and closing.

The expansion device according to the present invention includes expansion fluid supply means (not shown) for supplying water through the openings of the first connector 40 or the second connector 50, Or a cleaning gas supply means (not shown) for supplying air through an opening / closing port of the second connector 50. [

The tube 80 is inserted into the pin insertion groove 22 of the pin jig 20 and the tube 30 is inserted into the tube insertion hole 82 of the pin 80 A portion of the tube 30 where the fins 80 are not positioned is pressed by a constant force to expose the tube 30 with excessive water pressure during the expansion of the tube 30 due to the water pressure before the tube 30 is expanded, (70) for preventing bursting or breakage of the battery as it expands rapidly.

The pressing means 70 includes a link portion 72 provided at one side of the main body 10 and rotated to be positioned at an upper side in a direction parallel to the upper surface of the main body 10, And a plurality of pressing portions 74 which are moved up and down with respect to the pipe 72 to press a portion where the pin is not positioned in the pipe.

A method of expanding the pipe using the expanding device having the above-described structure will be described as follows.

First, as shown in FIGS. 1, 4 and 5A, the pins 80 are inserted into the pin insertion grooves 22 of the pin jig 20 at regular intervals, .

At this time, the method of inserting the pins 80 into the pin insertion groove 22 of the pin jig 20 can be automatically inserted by using a separate jig.

Herein, the process of repeatedly performing the process of inserting the pin 80 at a predetermined interval in the entire length of the pin jig 20 and then preventing the pin from being inserted at a predetermined interval is repeatedly performed so that the pins of the bundle . Therefore, a portion where the pin is not positioned at a predetermined interval in the pin jig 20 is generated.

On the other hand, the pins 80 inserted into the pin insertion grooves 22 of the pin jig 20 have a structure in which the tube insertion holes 82 are formed in parallel to each other. On both sides of the upper surface of the pin jig 20, And a semicircular groove 24 corresponding to the tube insertion hole 82 of the pin 80 is formed in the pin insertion hole 82 of the pin 80. When the pin 80 is inserted into the pin jig 20, Is in horizontal alignment with the semicircular grooves (24) of the pin jig (20).

5B, when the tube 30 is inserted into the tube insertion hole 82 of the pin 80 at a certain length through either end, the tube 30 is inserted into the tube insertion hole 82 of the pin 80, And is seated in the upper end of the semicircular groove (24) of the pin jig (20) in a state of being inserted into the tube insertion hole (82).

The diameter of the tube 30 is smaller than the diameter of the tube insertion hole 82 so that the insertion of the tube 30 into the tube insertion hole 82 of the pins 80 is very easy do.

In this state, as shown in Figs. 3A, 3B and 6, by using the pressing means 70 formed on one side of the main body 10, a portion of the tube 30 where the fins 80 are not located is pressed .

That is, after the pressing unit 70 is rotated so that the link unit 72 is positioned in parallel with the upper surface of the main body 10, the pressing unit 74 is lowered, The portion where the pin 80 is not located is pressed with a constant force.

Next, the inlet end and the outlet end of the tube 30 are respectively fitted to the first connector 40 and the second connector 50 provided on the front and rear sides of the main body 10 by the up-and-down movement and the back-and-forth movement .

The inlet end of the tube 30 is drawn into the insertion port of the first connector 40 by moving the first connector 40 and the second connector 50 up and down, To be inserted into the insertion port of the second connector (50).

The rotation of the link portion 72 and the ascending and descending of the pressing portion 74 by the pressing means 70 and the ascending and descending of the first and second connectors 40, And can be configured to be automatically performed by the action of the user. That is, it is preferable that the pressing means 70 and the connectors 40, 50 are configured to be automatically rotated, raised and lowered by hydraulic or pneumatic cylinders.

As described above, the first connector 40 and the second connector 50 are connected to the first connector 40 or the second connector 50 in a state where the first connector 40 and the second connector 50 are airtightly inserted into the inlet and outlet ends of the tube 30, The formed opening / closing port is closed by the opening / closing valve, and the expanded fluid supply means supplies water to the inside of the tube 30 by supplying water at a high pressure through the opening / closing port formed in the corresponding second connector 50 or the first connector .

At this time, the primary water pressure is generated through the opening / closing port of the first connector (40) or the second connector (50) connected to the expanding fluid supply means so that the tube (30) reaches the yield point, The secondary water pressure is generated, and the inside of the tube 30 is expanded while the water pressure rises to the set pressure.

Here, the pressing portion 74 of the pressing means 70 presses the portion of the tube 30 where the pin 80 is not positioned, with a certain force, so that the tube 30 is blown or broken by the sudden water pressure .

Thus, the tube 30 is expanded to enlarge the diameter of the tube 30 as shown in FIG. 9A, and the tube insertion hole 82 of the pin 80 is fitted around the tube 30 The opening / closing valve of the first connector 40 or the second connector 50, which is not connected to the expanding fluid supply means, opens the opening / closing port, so that the water inside the tube 30 flows into the opening / So that the user can get out of the room.

Thereafter, the cleaning gas supply means provided in parallel with the expanding fluid supply means supplies air through the openings of the second connector 50 or the first connector 40 so that the residual water remaining inside the tube 30 And discharged to the outside. Here, the air and the residual water are discharged to the outside through the openings of the first connector (40) or the second connector (50) which are not connected to the cleaning gas supply means.

Here, the expanded fluid supply means and the rinse gas supply means are arranged in parallel to selectively supply water and air through the opening / closing port of the second connector 50, thereby realizing a more compact configuration.

The first connector 40 is hermetically connected to the inlet end of the tube 30 and the first connector 40 is connected to the outlet end of the tube 30 in an airtight manner 7 (c), the tube 30a is U-shaped, and the inlet and outlet ends of the tube 30a are connected to the main body 10, The first connector 40 and the second connector 50 may be provided on either side of the main body 10. [

In particular, it is possible to expand the tubes of various shapes having the curvature, such as the straight or U-shaped tubes 30 and 30a, by the above-described method only by replacing the pin jig 20 provided on the main body 10 to be.

Here, in the case of the straight tube 30, the first connector 40, which is hermetically coupled to the inlet end of the tube 30, and the second connector 50, which is hermetically coupled to the outlet end of the tube 30, And a first connector 40 which is hermetically coupled to the inlet end of the tube 30a in the case of the U-shaped tube 30a and a second connector 40 which is hermetically coupled to the outlet end of the tube 30a in the case of the U- The connector 50 is disposed on one side of the main body 10. The connector 10 is provided with a connector connected to the expanding fluid supply means and the cleaning gas supply means on either side of the main body 10, And a connector for discharging water and air is provided on the opposite side of the tube 30, so that it is possible to expand all the tubes having all the bends without depending on the shape of the tubes 30 and 30a to be expanded Leave.

Of course, as shown in FIG. 7 (b), depending on the installation of the pin jig 20, it is possible to expand the straight tube 30 of multiple rows at the same time, Various types of heat exchangers can be easily manufactured.

As described above, after the tube 30 is expanded, the first connector 40 and the second connector 50 are returned back to their home positions by forward and backward movement, and the pressurizing means 70 and the pressurizing portion And the tube 30 is lifted upward from the pin jig 20 after returning to the home position by the upward movement of the link portion 72 and the rotation of the link portion 72. As a result, The production of a heat exchanger equipped with pins 80 is completed.

As described above, the tube 30 that has been produced as described above is expanded by the water pressure without being forcedly expanded by the solid body such as the expanding ball or the tip, or the expanding mandrel. As shown in Fig. 9, , So that the inner pin 32 is not damaged and is expanded.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Further, the technical ideas described in the embodiments of the present invention may be performed independently of each other, or two or more may be implemented in combination with each other.

10: main body 20: pin jig
22: pin insertion groove 24: semicircular groove
30: tube 32: inner pin
40: inlet side connector (first connector) 50: outlet side connector (second connector)
70: pressing means 72:
74: pressing portion 80: pin
82: tube insertion hole

Claims (7)

A body;
A pin jig provided on the main body and provided with a pin support portion for supporting the heat exchanger pins formed with the tube insertion holes;
A first connector and a second connector each of which is detachably installed at an inlet end and an outlet end of a tube inserted into a tube insertion hole of the fins to be supported by the pin jig and is configured to respectively open and close the inlet end and the outlet end, Wow;
Expanding fluid supply means for injecting an expanding fluid into the tube through the first connector or the second connector to expand the tube to the pressure of the injected expanding fluid;
A pressing means for pressing the non-arrangement section in which the pins are not located in the tube to restrict the expansion of the tube when the expanding fluid is injected into the tube;
And a cleaning gas supply means for cleaning the tube by injecting a cleaning gas into the tube through the first connector or the second connector,
When the expanding fluid is injected into the tube through the first connector or the second connector, one connector to be supplied with the expanding fluid is opened and the remaining connector is closed,
Wherein when the cleaning gas is injected into the tube through the first connector or the second connector, both connectors are opened,
Expansion device. The method according to claim 1,
Wherein the pressing means comprises:
A link portion rotated with respect to the main body;
And a pressurizing portion that pressurizes the non-batch section in which the pins are not positioned in the tube while being lifted up and down relative to the link portion.
Expansion device. delete The method according to claim 1,
Wherein the first connector and the second connector are provided on opposite sides of the main body so as to face each other,
Expansion device. The method according to claim 1,
Wherein the first connector and the second connector are provided on either side of the main body,
Expansion device. The method according to claim 1,
Wherein the first connector and the second connector are provided on opposite sides of the main body so as to face each other,
Wherein the expansion device further comprises a third connector, wherein the third connector is disposed parallel to the first connector or the second connector,
Expansion device. A method for expanding a tube using the expanding apparatus according to claim 1,
a) supporting pins for a heat exchanger in which a tube insertion hole is formed in a pin support of a pin jig;
b) inserting a tube into the tube insertion hole of the fin;
c) installing a first connector and a second connector at the inlet and outlet ends of the tube, respectively;
d) pressurizing the non-batch section in which no pins are located in the tube after step b) or step c);
e) expanding the tube to the pressure of the expanding fluid by closing the first connector or the second connector and then injecting the expanding fluid into the tube through the unclosed connector by the expanding fluid supply means, ; ≪ / RTI >
f) opening said closed connector and then injecting a cleaning gas into said tube through said first connector or said second connector by means of a cleaning gas supply means to clean said tube,
How to expand.
KR1020150123075A 2015-08-31 2015-08-31 Tube Expanding Apparatus and Tube Expanding Method KR101579807B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180049520A (en) * 2016-11-03 2018-05-11 주식회사 세아에프에스 Heat exchager and manufacturing method thereof
KR20190122927A (en) * 2018-04-23 2019-10-31 최병월 Apparatus for expanding pipe using fluid pressure
KR20190122926A (en) * 2018-04-23 2019-10-31 최병월 Apparatus and method for expanding pipe
CN116354590A (en) * 2023-02-09 2023-06-30 江苏圣达石英制品有限公司 Quartz tube expanding device and method

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Publication number Priority date Publication date Assignee Title
JPH09192766A (en) * 1995-06-01 1997-07-29 Kyoshin Kogyo Kk Method and device for manufacturing heat exchanger
JP2004190906A (en) * 2002-12-10 2004-07-08 Showa Denko Kk Heat exchanger tube with fin, heat exchanger, and device and method for manufacturing heat exchanger tube with fin

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH09192766A (en) * 1995-06-01 1997-07-29 Kyoshin Kogyo Kk Method and device for manufacturing heat exchanger
JP2004190906A (en) * 2002-12-10 2004-07-08 Showa Denko Kk Heat exchanger tube with fin, heat exchanger, and device and method for manufacturing heat exchanger tube with fin

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180049520A (en) * 2016-11-03 2018-05-11 주식회사 세아에프에스 Heat exchager and manufacturing method thereof
KR101928627B1 (en) * 2016-11-03 2019-03-14 주식회사 세아에프에스 Heat exchager and manufacturing method thereof
KR20190122927A (en) * 2018-04-23 2019-10-31 최병월 Apparatus for expanding pipe using fluid pressure
KR20190122926A (en) * 2018-04-23 2019-10-31 최병월 Apparatus and method for expanding pipe
KR102066347B1 (en) * 2018-04-23 2020-01-14 최병월 Apparatus for expanding pipe using fluid pressure
KR102090379B1 (en) 2018-04-23 2020-03-17 최병월 Apparatus and method for expanding pipe
CN116354590A (en) * 2023-02-09 2023-06-30 江苏圣达石英制品有限公司 Quartz tube expanding device and method
CN116354590B (en) * 2023-02-09 2023-12-01 江苏圣达石英制品有限公司 Quartz tube expanding device and method

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