JPH06262285A - Device for expanding pipe - Google Patents

Abstract

PURPOSE:To improve working efficiency by constituting the structure of a pipe expanding device so as to facilitate attaching, detaching and changing works of a heat exchanger before and after expanding the pipe. CONSTITUTION:(1) In a heat exchanger laying table 3, a heat exchanger shifting body 3b having a receiving tool 3c which can lay the heat exchanger 8 to be expanded, is provided at the tip part of a mandrel 6a arranged in a reciprocating working body 6 and arranged so as to be freely shifted in the crossing direction at the right angle in reciprocating direction of the reciprocating working body 6. (2) A heat exchanger holding device 4 which can hold the heat exchanger 8 laid on the shifting body 3b by the shifting distance, is arranged in either the heat exchanger shifting body 3b or the hear exchanger laying table 3, or in the proximity thereof. (3) The receiving tool 3c is constituted with an elastic body. By this method, the heat exchanger before and after expanding the pipe is firmly held and the working time for attaching, detaching and exchanging, etc., is shortened and the production efficiency can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe expanding device, and more particularly to a pipe expanding device provided with a heat exchanger mounting table and a heat exchanger holding device for continuously supplying and discharging a heat exchanger.

[0002]

2. Description of the Related Art Conventionally, as a tube expanding device used in a tube expanding process of a heat exchanger, for example, as shown in FIGS.
Reciprocating body that can be moved up and down through the cylinder 12.
A plurality of pipe expanding mandrels 14 are hung on the pipe 13, and a predetermined number of heat radiation fins 16 and a plurality of pipes 15 to be pipe-expanded inserted into the heat radiation fins 16 are provided below the reciprocating body 13. The formed heat exchanger 17 is placed on the reciprocating body.
Heat exchanger mounting table 19 for setting to the descending position of 13,
There is a pipe expanding device 20 rotatably provided on a base 20a by a hydraulic cylinder 18 and a predetermined rotating mechanism, and is used in a pipe expanding process of various heat exchangers.

When the heat exchanger 17 for expanding the pipe is supplied to the pipe expanding device 20 having the above-mentioned structure, the worker himself / herself transfers the heat exchanger 17 through a carriage (not shown) or the like.
The heat exchanger 17 was expanded to the heat exchanger mounting table 19 and sequentially set to supply the heat exchanger 17 to the tube expanding device 20.

[0004]

However, as in the conventional case, the operator transfers the heat exchanger 17 transferred by a worker himself / herself through a carriage (not shown) or the like to the heat exchanger mounting table 19. In the case of sequentially supplying the heat exchanger 17 that expands the pipes by sequentially setting the pipes to the pipe expanding device 20, the following problems occur.

That is, in the tube expanding device 20 using the conventional heat exchanger mounting table 19, the heat exchanger 17 after tube expansion is taken out from the heat exchanger mounting table 19, and then the heat exchange for performing the tube expansion is performed. The heat exchanger 17 must be set again on the heat exchanger mounting table 19, and the expanded heat exchanger 17 must be transferred to some transfer means and transferred to the next step.

Therefore, the heat exchanger mounting table of the tube expanding device 20
If a conveyor for supplying heat exchangers up to 19 is installed, complicated work related to the setting of the heat exchanger 17 can be solved, but in any case, the heat exchanger 17 before expansion has a plurality of radiating fins.
Since it has a very unstable structure in which the pipe 15 for expanding the pipe is simply attached to the pipe 16, the pipe 15 is detached from the heat radiation fin 16 or heated in the process of placing it on a conveyor and transferring it. Distortion will also occur in the overall shape of the exchanger 17,
It is also impossible to simply place the heat exchanger 17 before pipe expansion on a conveyor or the like for transfer.

Therefore, there is a time loss such as the taking out time of the heat exchanger 17 after the pipe expansion, the setting time of the next heat exchanger 17, and the transfer time of the heat exchanger 17 for transferring to the next process. As a result, the operating time of the pipe expanding device 20 is significantly hindered, and the productivity and work efficiency are significantly reduced, which is a serious problem.

Further, the heat exchanger 17 expanded by the expansion device 20 as described above may have different outer diameters and insertion patterns of the tubes 15 inserted into the plurality of heat radiation fins 16 depending on the product number and the specification. Each is different.

Therefore, a heat exchanger having different product numbers and specifications
In the case of mounting 17 on the heat exchanger mounting table 19, the heat exchanger 17 has a diameter corresponding to the outer diameter or the mounting pattern of the pipe 15 inserted into the heat exchanger 17 to be expanded. Not only was the receiver 21 for the pipe 15 required, but the replacement work was also very complicated.

However, the present invention solves all of the above problems, and always holds firmly a heat exchanger having an extremely unstable structure before and after pipe expansion, and at the same time, the heat exchanger. Since it can be continuously transferred to a predetermined location on a straight line, it takes time to take out the heat exchanger after pipe expansion, set time for the next heat exchanger for pipe expansion, and further transfer the heat exchanger to the next process. In addition to eliminating the time loss such as transfer time to a trolley, etc., the outer diameter of the pipe inserted in the heat exchanger and the insertion pattern may differ depending on the product number and specifications. Another object of the present invention is to provide a tube expanding device which has excellent workability and does not require any complicated replacement of the receiving device at all, and which has extremely high production efficiency.

[0011]

That is, according to the present invention, a receiver capable of mounting a heat exchanger 8 expanded in the direction of the tip of a mandrel 6a provided on a reciprocating body 6 through the mandrel 6a. A heat exchanger mounting table 3 having a heat exchanger transfer body 3b provided with 3c is provided movably in a direction intersecting the reciprocating direction of the reciprocating body 6, and the heat exchanger transfer body 3b or The heat exchanger 8 mounted on the heat exchanger transfer body 3b can be held at a predetermined transfer distance either in the heat exchanger mounting table 3 or in the vicinity of the heat exchanger mounting table 3. The point is that the heat exchanger holding device 4 is provided.

Further, the receiving member 3c is formed of an elastic body.

[0013]

In the tube expanding device having the above structure, the receiving member 3c capable of mounting the heat exchanger 8 expanded through the mandrel 6a in the distal direction of the mandrel 6a provided on the reciprocating body 6. A heat exchanger mounting table 3 having a heat exchanger transfer body 3b provided with is provided movably in a direction intersecting the reciprocating direction of the reciprocating body 6, and the heat exchanger transfer body 3b or the heat exchanger transfer body 3b. The heat that can hold the heat exchanger 8 placed on the heat exchanger transfer body 3b at a predetermined transfer distance, either in the heat exchanger mount 3 or in the vicinity of the heat exchanger mount 3 Since the exchanger holding device 4 is provided, it is possible not only to prevent the pipe of the heat exchanger 8 before pipe expansion from coming off from the heat radiation fin, but also to perform heat exchange before and after pipe expansion. 8 Heat exchange consisting of an unstable structure without causing distortion in the overall shape 8 always can be transported and firmly held.

Further, since the receiving member 3c is formed of an elastic body, the outer diameter or the insertion of the tube inserted into the heat exchanger 8 depends on the product number and the specification of the heat exchanger 8 for expanding the tube. Even when the wearing patterns are different, the heat exchanger can be placed on the heat exchanger transfer body 3b instantaneously and reliably without any complicated replacement of the receiving device.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a pipe expanding device composed of two columns 1b standing on a base 1a.

Reference numeral 2 is a cylinder provided to vertically move a reciprocating body 6 having a pipe expanding mandrel 6a vertically installed, and two pipes are provided above the pipe expanding device 1 so as to be vertically movable through two guide posts 7. It becomes.

Below the reciprocating body 6, a flare punch plate 5 having a flare punch 5a for subjecting the pipe of the heat exchanger after pipe expansion to a predetermined flare process is provided with a predetermined suspension rod body (not shown). (3) is suspended from the reciprocating body 6.

3 receives a pipe (not shown) inserted into a heat exchanger 8 expanded via a pipe expanding mandrel 6a vertically installed on the reciprocating body 6 to move the heat exchanger 8 A heat exchanger mount capable of mounting a plurality of heat exchanger transfer bodies 3b equipped with mountable plate-shaped rubber receivers 3c in a line in a direction intersecting the reciprocating direction of the reciprocating body 6. 3 shows a heat exchanger mounting table having a portion 3a.

The heat exchanger mounting portion 3a intersects the longitudinal direction of the heat exchanger mounting base 3 having the heat exchanger mounting portion 3a, that is, the reciprocating direction of the reciprocating body 6. A predetermined number of rotating rollers 9 are arranged side by side so that each of the heat exchanger transfer bodies 3b on which the heat exchanger 8 is mounted can be reciprocated in a free state.

Numeral 4 designates substantially the same interval as that of the heat exchangers 8 so as to simultaneously hold the heat exchangers 8 which are sequentially mounted in a row on the heat exchanger mounting table 3 and at the same time. The heat exchanger holding | maintenance apparatus continuously provided along the longitudinal direction of the stand 3 is shown.

In addition, each of the heat exchanger holding devices 4 has:
Each of the heat exchangers 8 mounted on the heat exchanger mounting portion 3a via the plate-shaped rubber receiver 3c of the heat exchanger transfer body 3b is faced from both sides of the heat exchanger 8. A pair of heat exchanger holding devices provided with a rotatable heat exchanger holding body 4b for holding as much as possible.
The pair of heat exchanger holding devices 4a provided with the heat exchanger holding device 4 are connected to a rotating device 10 that can rotate in forward and reverse directions, and have a male screw portion of a predetermined pitch ( A rod rod 10a having a not-shown) is inserted, and the heat exchanger holding body 4b is faced to approach or separate by the forward and reverse rotation of the rod rod 10a.

Reference numeral 11 denotes a large rodless device provided with a horizontal reciprocating movable body 11a for reciprocating each of the heat exchanger holding devices 4 connected in series along the longitudinal direction of the heat exchanger mounting table 3. Indicates a cylinder.

The tube expanding device according to the present embodiment has the above-described structure. Next, the case of using the tube expanding device will be described.

First, as shown in FIGS. 1 and 2 (a), the heat exchanger 8 expanded by a pipe expanding mandrel 6a suspended from the reciprocating body 6 of the pipe expanding device 1 is heat-exchanged. The heat exchanger transfer body via the plate-shaped rubber receiver 3c of the heat exchanger transfer body 3b
3b, and then the heat exchanger transfer body 3b is sequentially arranged on the rotary roller 9 provided side by side on the heat exchanger mounting portion 3a of the heat exchanger mounting table 3 with a predetermined interval. When placed, each of the heat exchangers 8 is attached to the heat exchanger holding device 4a of each heat exchanger holding device 4 that is continuously provided along the longitudinal direction of the heat exchanger placement table 3. It is held (arrow A) from both sides via the exchanger holding body 4b and firmly held as shown in FIG.

Next, as shown in FIG. 5C, each of the heat exchangers 8 has a heat exchanger holding device 4a of the heat exchanger holding device 4.
The heat exchanger holding device 4 holding the heat exchanger 8 after being firmly held via the heat exchanger holding body 4b provided in
Each of the heat exchangers 8 moves by moving with a horizontal reciprocating body 11a that moves in one longitudinal direction of the heat exchanger mounting table 3 along a predetermined guide rail 11b by a certain distance (arrow B). Is also transferred by a fixed distance on the rotary roller 9 arranged in parallel on the heat exchanger mounting portion 3a.

It should be noted that each of the heat exchangers 8 transferred by the above-mentioned fixed distance is, as shown in FIG.
Through the release (arrow C) of the heat exchanger holding body 4b of the heat exchanger holding device 4 for holding the heat exchanger holding device 4, it is temporarily opened as shown in FIG.

Next, as shown in FIG. 3C, with the heat exchanger 8 temporarily opened, both the horizontal reciprocating body 11a and the heat exchanger holding device 4 are connected to the guide rail 11b. Move back to the initial position again (arrow D)
By doing so, each of the heat exchangers 8 mounted in a line on the rotating roller 9 juxtaposed on the heat exchanger mounting portion 3a of the heat exchanger mounting base 3 can be simultaneously held again.

Therefore, since the heat exchangers mounted on the heat exchanger mounting table can be successively transferred while being firmly held, the entire heat exchangers can be transferred before and after expansion. Without distorting the shape etc., further taking out time of the heat exchanger after tube expansion, setting time of the next tube expansion heat exchanger, and further transfer time to a dolly etc. for transportation to the next process It is possible to eliminate various time losses such as, and to have high-efficiency productivity and workability. Also, due to the difference in the product number and specifications of the heat exchanger that expands the pipe, Even if the outer diameter, the insertion pattern, etc. are different, the heat exchanger can be placed on the heat exchanger transfer body instantly and reliably without any complicated replacement of the receiver. is there.

In the above-described embodiment, the tube expanding device is provided with a reciprocating body having two mandrel for pipe expanding vertically via two cylinders provided above the tube expanding device. Although it is configured to be able to move up and down, it may be a single cylinder, or four guide posts may be provided at four corners of the reciprocating body, and the reciprocating body is a pipe expanding device. It may be configured to reciprocate via an LM guide provided along a column vertically installed on the base.

Further, in the above-described embodiment, in the tube expanding device, the heat exchanger mounting base forming the heat exchanger mounting portion by the rotating rollers arranged in parallel intersects with the reciprocating direction of the reciprocating body. The heat exchanger transfer body on which the heat exchanger expanded from one side is mounted can be continuously supplied, and the heat exchanger after the expansion is provided so as to be sequentially discharged to the other side, but not necessarily the rotating roller. However, for example, an endless annular belt body (not shown) may be spanned between the rotating bodies such as the rotating roller to form the heat exchanger mounting portion, and further, a predetermined interval. The heat exchanger mounting portion may be formed by a ball body (not shown) that is embedded in and rolls.

Further, a rail body (not shown) in which the heat exchanger mounting portion is provided along the longitudinal direction of the heat exchanger mounting base.
And a plurality of heat exchanger mounting plates (not shown) equipped with a rotating tool (not shown) that rolls along the rail body (not shown).

Further, in the above embodiment, the plate of the heat exchanger transfer body on the heat exchanger mounting table is provided in the vicinity of the heat exchanger mounting table along the longitudinal direction of the heat exchanger mounting table. A heat exchanger holding device continuously provided at substantially the same interval as the distance between the heat exchangers for simultaneously holding each of the heat exchangers mounted via the rubber-shaped rubber receiver, and Each of the heat exchanger holding devices holds a heat exchanger mounted on a heat exchanger transfer body on the heat exchanger mounting table so as to hold the heat exchanger from opposite sides of the heat exchanger so that the heat exchanger is rotatable. A pair of heat exchanger holding devices provided with a device holding body are provided, and each of the pair of heat exchanger holding devices is connected to a rotating device capable of normal and reverse rotation, and a male screw part having a predetermined pitch. The heat exchanger holding body is rotatably operated by forward and reverse rotation of a rod bar (not shown) formed therein. However, it is not always necessary to operate the heat exchanger holding body by the forward and reverse rotation of the rod rod, and it may be power of a cylinder, an electric motor, etc., and a specific operation of the heat exchanger holding body. Regardless of the means, the means is that at least each of the heat exchangers mounted on the heat exchanger mounting table can be held at the same time, and the heat exchangers may be held in the front-rear direction. The specific shape, quantity, and mounting location of the container holder are not limited.

Further, each of the heat exchanger holding devices is fixed in the longitudinal direction of the heat exchanger mounting table by a horizontal moving body moving through a large rodless cylinder and a predetermined interlocking mechanism (not shown). While moving by the distance of
After moving a certain distance, it is configured to move back to the initial position again. For example, each of the heat exchanger holding devices is independent of each other without a horizontal moving body and a predetermined interlocking mechanism (not shown). It may be configured to be operated by a power source such as a cylinder or an electric motor, and the point is that each of the heat exchanger holding devices simultaneously moves in one direction by a fixed distance, and again after moving by a fixed distance. The specific reciprocating mechanism of each heat exchanger holding device is not limited as long as it is configured to move backward to the initial position in the other direction.

Further, in the above embodiment, a plurality of heat exchangers are mounted on the heat exchanger mounting portion of the heat exchanger mounting table via the plate-shaped rubber receivers of the plurality of heat exchanger transfer bodies. Are arranged in one row, but are not necessarily limited to one row, and may be two rows or three rows. The point is that a plurality of heat exchangers can be placed in at least one row at predetermined intervals, and As long as the heat exchangers can be held at the same time and transferred at a fixed distance, the specific mechanism, shape, location, arrangement of the heat exchanger mounting table and the heat exchanger holding device can be set. The number of installations is not limited, either.

Further, in the above-mentioned embodiment, the heat exchanger mounting table includes a plurality of heat exchanger transfer bodies equipped with a plate-shaped rubber receiver on which the heat exchanger can be mounted, and the reciprocating body. Although it has a heat exchanger mounting portion that can be mounted in a line in a direction intersecting the reciprocating direction of, and is provided below the pipe expanding device so as to pass through the inside of the pipe expanding device from one side to the other side, It is not always necessary to pass under the tube expanding device, and for example, the heat exchanger mounting table may be provided so as to bend from the front side of the tube expanding device to the lateral side at a substantially right angle. A mounting table is provided at the front or side of the tube expanding device, and transfers the heat exchanger transfer body on which the heat exchanger before tube expansion is mounted from one to a position facing the reciprocating body of the tube expanding device,
Further, after the pipe expansion, the heat exchanger transfer body may be configured to be reciprocally movable so as to move in the opposite direction again to one side. The moving direction of the heat exchanger transfer body placed on the stand is not limited, either.

Further, in the above embodiment, the heat exchanger holding device is continuously provided along the longitudinal direction of the heat exchanger mounting table, but the point is that it intersects with the reciprocating direction of the reciprocating body. The heat exchanger transfer body, the heat exchanger mounting table, or the heat exchanger mount for holding the heat exchanger mounted on the heat exchanger transfer body movably in a predetermined direction by a predetermined transfer distance. If they are provided in the vicinity of the table, they are not necessarily connected in series, and the heat exchanger holding device is a single unit and holds the heat exchanger for a predetermined distance and transfers it. May be.

Further, in the above-mentioned embodiment, the heat exchanger receiver provided on the heat exchanger transfer body is a pipe inserted into the heat exchanger depending on the product number and the specification of the heat exchanger. Even if the outer diameter and the insertion pattern of the heat exchanger are different, it is possible to mount the heat exchanger instantly and reliably on the heat exchanger transfer body without any complicated replacement of the receiving device. However, the type of the rubber may be a synthetic rubber containing natural rubber or butadiene rubber as a main component. The point is that the outer diameter of the pipe inserted into the heat exchanger, the insertion pattern, etc. Irrespective of the above, the heat exchanger can be placed on the heat exchanger transfer body by receiving a tube protruding from the heat exchanger, and the tube can be unidirectionally pressed through the mandrel when the tube is expanded. If it is an elastic body that can receive the tube energized with, polyurethane, poly salt It may be a resin material such as vinyl or thermoplastic elastomer, or may be integrally formed of a fibrous material, and the specific material, shape, etc. of the receiver made of the elastic body are by no means limited, Needless to say, a plurality of elastic bodies may be provided in the heat exchanger transfer body.

Further, in the above-described embodiment, the tube expanding device is provided with a reciprocating body which can be moved up and down along two guide posts via a cylinder provided between two columns supported upright on the base. The vertical pipe expanding device has, but the reciprocating body may be a horizontal pipe expanding device capable of reciprocating in the horizontal direction,
Further, the operating mechanism of the flare punch plate equipped with the flare punch for performing the predetermined flare processing on the tube of the heat exchanger after the tube expansion and the presence or absence of the flare punch plate are by no means limited.

[0040]

As described above, according to the present invention, the heat is provided in the direction of the tip of the mandrel provided on the reciprocating body, and the heat exchanger is provided with the heat exchanger which is expanded through the mandrel. A heat exchanger mounting table provided with an exchanger transfer body is movably provided in a direction intersecting the reciprocating direction of the reciprocating body, and the heat exchanger transferring body, the heat exchanger mounting table, or the heat exchanger mounting table. Since a heat exchanger holding device capable of holding the heat exchanger mounted on the heat exchanger transfer body by a predetermined transfer distance is provided in any of the vicinity of the exchanger mounting table, Not only can the pipes of the heat exchanger before expansion be prevented from coming off from the radiation fins, but also the shape of the entire heat exchanger will be stable without distortion both before and after expansion. It is possible to always hold and transfer the structured heat exchanger firmly. Come.

Further, since the receiving member is formed of an elastic body, the outer diameter and the insertion pattern of the tube inserted into the heat exchanger are expanded depending on the product number and the specification of the heat exchanger for expanding the tube. Even when the heat exchangers are different, the heat exchanger can be placed on the heat exchanger transfer body instantly and reliably without any complicated replacement of the receiving device.

Therefore, the heat exchanger having a very unstable structure is always firmly held before and after the pipe expansion, and the heat exchanger is continuously transferred linearly to a predetermined position. Therefore, it is possible to remove the heat exchanger after pipe expansion, set time for the next heat exchanger for pipe expansion, and transfer time to a truck to transfer the heat exchanger to the next process. In addition to eliminating the problem, even if the outer diameter of the tube inserted into the heat exchanger and the insertion pattern differ due to differences in product numbers and specifications, there is no need for complicated replacement of the receiver at all. It has a special effect that it is possible to provide a pipe expanding device having excellent properties and extremely high production efficiency.

[Brief description of drawings]

FIG. 1 is a front view of a tube expanding device according to the present invention.

FIG. 2 shows a transfer state of the heat exchanger in the pipe expanding apparatus of the present invention, FIG. 2 (A) is an enlarged plan view of a main part, FIG.
(C) is an enlarged front view of the main part.

FIG. 3 shows a transfer state of the heat exchanger in the tube expanding device of the present invention, FIG. 3 (A) is an enlarged plan view of an essential part, FIG.
(C) is an enlarged front view of the main part.

FIG. 4 is a perspective view of a conventional tube expanding device.

FIG. 5 is a side view showing a supply state of a heat exchanger in a conventional tube expanding device.

[Explanation of symbols]

 1 ... Tube expansion device 3 ... Heat exchanger mounting table 3a ... Heat exchanger mounting part 3b ... Heat exchanger transfer body 3c ... Receptor 4 ... Heat exchanger holding device 4a ... Heat exchanger holding device

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[Procedure amendment]

[Submission date] March 5, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

That is, according to the present invention, a receiver capable of mounting a heat exchanger 8 expanded in the direction of the tip of a mandrel 6a provided on a reciprocating body 6 through the mandrel 6a. A heat exchanger mounting table 3 having a heat exchanger transfer body 3b provided with 3c is provided to move the heat exchanger transfer body 3b in a direction intersecting the reciprocating direction of the reciprocating body 6. ,
Further, a heat exchanger 8 mounted on the heat exchanger transfer body 3b is provided at a predetermined position in any of the heat exchanger transfer body 3b, the heat exchanger mounting base 3 or the vicinity of the heat exchanger mounting base 3. Is provided with a heat exchanger holding device 4 capable of holding only the transfer distance.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

[0013]

In the tube expanding device having the above structure, the receiving member 3c capable of mounting the heat exchanger 8 expanded through the mandrel 6a in the distal direction of the mandrel 6a provided on the reciprocating body 6. A heat exchanger mounting table 3 having a heat exchanger transfer body 3b provided with is provided to move the heat exchanger transfer body 3b in a direction intersecting the reciprocating direction of the reciprocating body 6.
Further, a heat exchanger 8 mounted on the heat exchanger transfer body 3b is provided at a predetermined position in any of the heat exchanger transfer body 3b, the heat exchanger mounting base 3 or the vicinity of the heat exchanger mounting base 3. Since the heat exchanger holding device 4 capable of holding only the transfer distance of the pipe is provided, not only can the pipe of the heat exchanger 8 before pipe expansion be prevented from being removed from the radiation fin, but also the pipe expansion The heat exchanger 8 having an unstable structure can be always firmly held and transferred without causing distortion in the overall shape of the heat exchanger 8 both before and after expansion.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction content]

[0040]

As described above, according to the present invention, the heat is provided in the direction of the tip of the mandrel provided on the reciprocating body, and the heat exchanger is provided with the heat exchanger which is expanded through the mandrel. A heat exchanger mounting table provided with an exchanger transfer body is provided to move the heat exchanger transfer body in a direction intersecting the reciprocating direction of the reciprocating body, and the heat exchanger transfer body or A heat exchanger holder capable of holding the heat exchanger mounted on the heat exchanger transfer body by a predetermined transfer distance, either in the heat exchanger mounting table or in the vicinity of the heat exchanger mounting table. Since the device is installed, not only can the pipes of the heat exchanger before pipe expansion be prevented from coming off from the radiation fins, but the shape of the heat exchanger as a whole can be adjusted both before and after pipe expansion. Always strengthen the heat exchanger with an unstable structure without causing distortion. It can be transported and held in.

Claims (4)

[Claims] 1. A mandrel (6a) for expanding a pipe, which is inserted into a heat exchanger (8) to be expanded and has a mandrel (6a) for expanding the pipe, and is opposed to the pipe. In the tube expanding device (1) having the reciprocating body (6) that reciprocates,
A heat exchanger in which the mandrel (6a) provided on the reciprocating body (6) is expanded in the distal direction through the mandrel (6a).
A heat exchanger transfer body (3
The heat exchanger mounting table (3) provided with b) is the reciprocating body (6).
Is provided so as to be movable in a direction intersecting the reciprocating direction of the heat exchanger transfer body (3b) or the heat exchanger mounting table.
(3) or near the heat exchanger mounting table (3), hold the heat exchanger (8) mounted on the heat exchanger transfer body (3b) by a predetermined transfer distance. Heat exchanger holding device
(4) is provided, The pipe expanding device characterized by the above-mentioned. 2. The heat exchanger holding device (4) holds the heat exchanger (8) placed on the heat exchanger transfer body (3b), and at the same time, the heat exchanger transfer body (3b). Move in one direction with,
The pipe expanding device according to claim 1, wherein the held heat exchanger (8) is opened after a certain distance of movement. 3. The heat exchanger mounting table (3) is provided with a plurality of heat exchanger transfer bodies (3b), and the heat exchanger holding device (4) is provided with the heat exchanger transfer bodies (3). Each of the heat exchangers (8) placed on 3b) is simultaneously held and moved in one direction by a fixed distance, and after moving a fixed distance, each of the held heat exchangers (8) is moved. At the same time, and again in order to simultaneously hold each of the heat exchangers (8) placed on the heat exchanger transfer body (3b) at the same time, the heat exchanger mounting table (3) is moved in the opposite direction. Alternatively, the pipe expanding apparatus according to claim 1, which is provided in at least one of the vicinity of the heat exchanger mounting table (3). 4. The tube expanding device according to claim 1, wherein the receiving member (3c) is an elastic body.