JPH0647138B2 - Assembling apparatus and assembling method for cross-finch tube heat exchanger - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger assembling apparatus and method, and a method for inserting a hairpin pipe after stacking a large number of fins of the heat exchanger for stacking. TECHNICAL FIELD The present invention relates to an assembling apparatus and an assembling method for an exchanger.

[Background of the Invention]

In the conventional automatic assembly equipment for cross-finch Ube heat exchanger, loading is done in the state that many fins are stacked on the fixture on the rotary table, and while inserting the pipe into the fin's pipe insertion hole while rotating the rotary table intermittently. There is known a general-purpose assembling apparatus that can automatically perform the above-mentioned process and can freely perform the assembly by changing the model of the heat exchanger having different fin lengths.

However, there are many problems such as fin supply, fin separation, front side plate supply, and pipe insertion for aligning fin pipe insertion holes, first row pipe insertion, second row pipe insertion, irregular pipe insertion, work unloading, etc. Since the rotary table consisting of steps is used, the device becomes large and requires a large installation space.

Further, in the above-mentioned device, in the case of heat exchangers of one row and two rows in which the pipes are arranged only in the row direction when the number of the fin pipe insertion holes in each row is even (see (a), ( b)), or in the case of a two-row heat exchanger in which only one pipe is arranged in a direction different from the row direction when the number of fin insertion holes is odd (FIGS. 7 (c) and (d)). )), There is flexibility in changing the model of heat exchangers with different fin lengths. However, in the case of a heat exchanger having two or more rows in which the pipe arrangement is complicated, a large number of steps (a dedicated device for automatically inserting in the same pipe direction) are required for inserting the pipe.

Further, since the pipes are inserted into the vertically stacked fins, a frictional force due to the weight of the stacked fins acts to prevent the fin's pipe insertion hole from moving to fit the pipe. Therefore, the fins are compressed and deformed when the pipe is inserted. In order to prevent the fins from being deformed by compression, a partition plate has been conventionally provided in the middle of the stacked fins. The partition plate reduces the frictional force so that the fins can move easily when the pipe is inserted.

However, in the case of a heat exchanger with three or more rows of pipes,
The partition plate cannot be provided. Therefore, there is a problem that a smooth pipe cannot be inserted.

One such example is Japanese Examined Patent Publication No. 59-41817.

[Object of the Invention]

An object of the present invention is to provide an assembling apparatus and an assembling method for a cross-finch uve heat exchanger which has a small number of steps of inserting a hairpin pipe into a fin of a heat exchanger and prevents compression deformation of the fin when the pipe is inserted. is there.

[Outline of Invention]

In order to achieve the above object, the present invention is a heat exchanger in which a large number of plate fins and heat exchanger pipes are combined, and the fins of the heat exchanger are stacked one by one on a stacking stack and then the fins are stacked. The stacking hire is tilted at a right angle so that the surface of the cross is vertical, and while the fin pipe insertion holes are positioned sequentially, the hairpin pipe is pushed horizontally and the pipe is inserted to insert the pipe. It is an assembly method.

That is, in the present invention, since the pipe is inserted in the horizontal direction, the weight of the fin displaced by the tip of the pipe is limited to the weight of the fin at the portion through which the tip of the pipe passes. By this, the hairpin pipe being inserted can be moved so that the pipe insertion hole of the fin fits.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. FIG. 1 is a diagram showing a processing step of forming a collective fin in which a plurality of fins are integrated. 1 is an aluminum thin plate, which is an extremely thin plate having a thickness of 0.08 to 0.15 mm. Two
Is a pipe insertion hole, and 3 is a first width cutting blade, which forms a continuous width cutting line 5 by continuously cutting in the feed direction of the aluminum thin plate 1. Reference numeral 4 denotes a second width-cutting cutting edge, which cuts at a constant interval in the feed direction of the aluminum thin plate 1 to form cuts leaving the uncut portion 7 and form a width-cutting line 6 leaving the end. The uncut portion 7 may be provided on both sides or only one side of the edge-width cutting line 6.
8 is a length cutting blade, which is a continuous width cutting line 5 at the uncut portion 7 position.
Is cut at a right angle to form the aggregate fin 9. Reference numeral 10 denotes a round small hole, which is provided at the end of the width cutting line 6 leaving the end so that the collective fin 9 can be easily cut into a plurality of fins. In FIG. 1, a large number of pipe insertion holes 2 are press-molded in an aluminum thin plate 1, and then a wide fin that is fed by a predetermined width is fed by a first width cutting blade 3 and a second width cutting blade 4 in a predetermined width. Cut off into. Here, the first width cutting edge 3 forms a continuous width cutting line 5 in the fin, and the second width cutting edge 4 forms an edge-remaining width cutting line 6 leaving an uncut portion 7. In this embodiment, there are shown 6 rows of aggregate fins 9 formed by arranging 3 rows of 2 rows at the same time in the width direction. However, by changing the mounting positions of the first width cutting blade 3 and the second width cutting blade 4, six or three fins in one row are provided.
It is also possible to form two row fins at the same time. That is,
The number of columns of the aggregate fin may be any number, for example, 2 in this embodiment.
Assuming a 12-column set fin with double the number of columns, 1 column, 2
There is flexibility that can accommodate five types of fins: three, four, and six.

In this way, the assembly fin 9 having the width cutting line 6 left at the end
Has less bending of the fins than the fins formed from the beginning with the conventional product row number. This is because the size of the collecting fins is several times larger than that of the conventional fins, and in particular, since the width dimension is large, bending is unlikely to occur during cutting. Therefore, it becomes easy to stack a large number of collective fins 9 one by one on the stacking hire 11 while cutting them to a desired length by the length cutting blade 8. FIG. 2 is a diagram in which the collecting fins are loaded into the stacking employment.
Numeral 11 is a stacking employment, and the outer diameter is slightly smaller than the diameter of the pipe insertion hole 2 of the collecting fin 9 and larger than the outer diameter of the hairpin pipe by the required number according to the size of the collecting fin 9 to be loaded. The stacking bar 13 is arranged. Reference numeral 12 is a fin pressing plate, and the fin pressing plates 12 are used to lightly press and support the continuous width cutting line 5 of the stacked fins 9. 14
Is a side plate for hiring stacking staff, 15 is an upper frame for hiring stacking staff, 16 is a main pillar, and 17 is a moving frame, which is guided by the main pillar 16. Reference numeral 18 is a rack for hiring a stacking staff, to which a stacking bar 13 is attached. 19 is an elevating plate, on which a collecting fin is placed and a stacking bar 13
It is also used for positioning. The stacking hire 11 shown in FIG. 2 can stack a large number of stacked fins 9 so that the position of the pipe insertion hole 2 does not shift and insertion of the hairpin pipe is easy.
This is mainly because the outer diameter of the stacking bar 13 is slightly smaller than the inner diameter of the pipe insertion hole 2 of the collecting fin 9 and larger than the outer diameter of the hairpin pipe. For example, when the inner diameter of the pipe insertion hole 2 of the collecting fin 9 is 9.9 mm and the outer diameter of the hairpin pipe is 9.5 mm, the outer diameter of the stacking bar 13 is preferably about 9.6 mm. Then, the large number of stacked fins 9 are supported by being lightly pressed by the fin pressing plate 12 at the continuous width cutting line 5 portion of the large number of collective fins 9. This is to prevent the stacking bar 13 from bending downward due to gravity when the stacking employment 11 is tilted 90 degrees as shown in FIG. This prevents deformation of the lower end of the collecting fin 9 inserted into the tip of the stacking bar 13 and prevents the pipe insertion hole 2 of the fin 9 from bending so that the hairpin pipe 28 can be inserted. It makes it easy.

FIG. 3 is a perspective view showing the assembly of the collecting fin and the pipe of the present invention. Reference numeral 20 is a front fin pressing plate, 21 is a pipe guide plate, and 21a is a pipe guide hole having an inclined surface for facilitating the insertion of the pipe. 22 is a Y table,
It operates in the direction of arrow Y. An X table 23 operates in the direction of arrow X. A Z table 24 operates in the direction of arrow Z. Reference numeral 25 is an NC table (NUMERICAL CONTOROL table) constituted by the X, Y, Z tables 22, 23, 24. 26 is a pipe tip positioning mechanism, and 27 is an insertion claw that pushes the hairpin pipe 28 in the direction of arrow C. Figure 4 shows
It is a plane sectional view of the pipe insertion part of FIG. Reference numeral 26a is a pipe tip positioning plate showing an embodiment of the pipe tip positioning member, and the pipe tip positioning mechanism 2 is constituted by the centering plate 26b and the pipe supporting plate 31 which is a pipe supporting member.
Make up 6. 28a and 28b are hairpin pipes 2
At the tip of 8, 28c is a bent portion. 29a is a front side plate. FIG. 5 is a perspective view showing a pipe tip positioning mechanism and a pipe insertion mechanism. 30 is a spring,
This is for moving the centering plate 26b in the direction of arrow B. 31 is a pipe support plate. FIG. 6 is a perspective view of the collective heat exchanger 32. 29b is a rear side plate. According to the above apparatus, the stacking employment in the state shown in FIG. 2 is tilted 90 degrees so that the side plate is on the lower side and placed on the NC table 25.

The NC table 25 shown in the figure is a Y table 22, an X table 23, and a Z table 24 in order from the top, but the arrangement order of each table is X, Y, Z, and N of three axes.
Any order may be used as long as it has the C function.

Next, according to the hairpin pipe arrangement of the heat exchanger, the front fin pressing plate 20 to which the pipe guide plate 21 having the pipe guide holes 21a is attached is provided on the front surface of the stacking hire 11. If the heat exchanger to be assembled is small, the size of the front fin pressing plate 20 is also small, so the pipe guide plate 21 may be integrated with the front fin pressing plate 20.
In accordance with the stacking height when the collecting fins 9 are stacked, the moving frame 17 to which the elevating plates 19a and 19b are attached is moved with the main pillar 16 as a guide, and the collecting fins 9 stacked a large number are added in the Y direction. Pressure support. To the extent that the fins are supported under pressure,
As shown in FIG. 4, the pipe insertion holes 2 of the collecting fin 9 are in close contact with each other and the pipe insertion holes 2 are not deformed or crushed. When the fins are pressure-supported in this manner, the weights of the other fins are not added to the fins, so that the fins can easily move individually. Therefore, the fin pipe insertion hole can move in accordance with the positions of the hairpin pipe tips 28a and 28b. As a result, the hairpin pipe can be easily inserted and deformation of the fin can be prevented.

On the other hand, the hairpin pipe 28 is moved by the pipe tip positioning mechanism 26 as shown in FIGS.
At the position of 1a, the tips 28a, 28b of the hairpin pipe
To match. Then, the insertion holes 27 are simultaneously operated in the direction of arrow C. In FIG. 3, two hairpin pipes 28 are shown in the vertical direction, but the number of hairpin pipes may be any number, and the total number of hairpin pipes may be automatically inserted at the same time. The total number of hairpin pipes 28 to be inserted into the fins may be divided into several times and automatically inserted.

Also, depending on the heat exchanger, some hairpin pipes
There is an oblique one like the hairpin pipe 28 'shown in FIG.

In this case, insert horizontally and insert diagonally separately. And when inserting at an angle,
The member shown in FIG. 5 may be rotated in the direction of arrow A.

Next, the tip portion 28a of the hairpin pipe is positioned by the pipe tip positioning plate 26a and the centering plate 26b, but the center of the pipe insertion hole 2 may be displaced by Δx as shown in FIG. The main cause of the deviation is deformation of the pipe. Even in this case, the tip portion 28a of the hairpin pipe is guided by the tapered portion of the pipe guide hole 21a. Therefore, no insertion error will occur. Further, as shown in FIG. 9, the tip portions 28a ', 2 of the hairpin pipe are
If 8b 'is contracted and the tip is formed in an R shape, the insertability of the pipe is further improved.

As a method for inserting the hairpin pipe, for example, as shown in FIG. 5, the hairpin pipe 28 is supported by the pipe support plate 31a, and then the hairpin pipe is pushed in the direction of arrow C by the insertion claw 27. As a result, the hairpin pipe 28
Is inserted into the fin pipe insertion hole 2. At this time, since the centering plate 26b is moved vertically by the spring 30, the bent portion 28c of the hairpin pipe can pass through the pipe tip positioning mechanism.

Further, FIG. 8 shows an embodiment of a pipe tip positioning mechanism different from that of FIG. That is, the pipe tip positioning plate 26a
The pipe support plate 31a is integrally formed, and the centering plate 26b is moved in the arrow B direction by a driving device such as a spring or a cylinder. It should be noted that, in addition to the pipe tip positioning mechanism of FIGS. 5 and 8, a mechanism for rotating in the direction of arrow A is added to the hairpin pipe 28, 28 'as shown in FIG. 7 (c) or (d). Even if the arrangement directions of are different, they can be inserted at the same time.

According to the present embodiment, the fin is fixed in the stacking hire 11 and the pipe guide plate 21 is provided so that the pipe insertion hole 2 is not displaced, so that there is no mistake in inserting the hairpin pipe into the fin and the fin is easy. Multiple hairpin pipes can be automatically inserted into.

Further, in the present embodiment, a collective fin including a plurality of fins is assembled to form a collective heat exchanger including a plurality of heat exchangers, and the final product is obtained by cutting into a number of rows as necessary. is there. For this reason, it is possible to deal with a large number of rows of heat exchangers.

〔The invention's effect〕

According to the present invention, the number of steps for inserting the hairpin pipe into the fin of the heat exchanger is small, so that the device can be downsized and the installation space of the device can be reduced. Further, it is possible to prevent the fin from being compressed and deformed when the pipe is inserted, so that the pipe can be smoothly inserted.

[Brief description of drawings]

FIG. 1 is a perspective view explaining a processing step of forming a collective fin, FIG. 2 is a perspective view of a stacking hire for loading a collective fin, and FIG. 3 is an assembly method of a collective fin and a pipe according to the present invention. The perspective view shown in FIG. 4 is a sectional view showing the state of the collecting fin, the pipe, and the pipe guide plate when the pipe is inserted. FIG. 5 is the perspective view showing the pipe tip positioning mechanism. FIG. 7 is a perspective view of the collective heat exchanger, FIG.
(B), (c) and (d) are explanatory views showing the difference in pipe arrangement, FIG. 8 is a perspective view showing another embodiment of the pipe tip positioning mechanism, and FIG. 9 is It is sectional drawing of the front-end | tip part of a hairpin pipe. 1 ... Aluminum thin plate, 2 ... Pipe insertion hole, 3 ... Width cutting edge A, 4 ... Width cutting edge B, 5 ... Continuous width cutting line, 6
…… Left end width cutting line, 7 …… Uncut part, 8 …… Length cutting edge, 9 …… Assembly fin, 9 ′ …… Product fin, 10 ...
… Round eyelets, 11 …… Stucking hire, 12 …… Fin presser plates, 12a, 12b, 12c, 12d …… Fin presser plates, 13 …… Stacking bars, 14 …… Side plates,
15 ... upper frame, 16 ... main pillar, 17 ... moving frame, 18 ...
... Frame, 19 ... Elevating plate, 19a, 19b ... Each elevating plate, 20 ... Front fin pressing plate, 21 ... Pipe guide plate, 21a ... Pipe guide hole, 22 ... Y table, 2
3 ... X table, 24 ... Z table, 25 ... NC
Table, 26 ... Pipe tip positioning mechanism, 26a ...
... Pipe tip positioning plate, 26b ... Centering plate,
27 ... Insertion claw, 28 ... Hairpin pipe, 28 '...
Irregular pipe (hairpin pipe), 28a, 28b
...... Hairpin pipe tip, 28c ...... Hairpin pipe bend, 29a ...... Front side plate, 29b ......
... rear side plate, 30 ... spring, 31 ... pipe support plate, 32 ... collective heat exchanger.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yukio Kitayama 800 Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Hitachi Co., Ltd. Tochigi factory (72) Inventor Katsuharu Uehara 800 Tomita, Ohira-machi, Shimotsuga-gun, Tochigi Hitachi, Ltd. Factory Tochigi Plant (72) Inventor Masahiro Miyagi Oita-cho, Shimotsuga-gun, Tochigi 800 Tomita Co., Ltd.Hitachi, Ltd.Tochigi Factory (72) Inventor Takahiko Exit Oita-cho, Tochigi Prefecture 800 Tomita Co., Ltd.Hitachi, Ltd. Tochigi Factory

Claims (2)

[Claims] 1. A front fin having a stacking cover for stacking and inserting a number of fins and having a stacking 90 ° reversible, and a pipe guide plate having a pipe guide hole arranged in front of the stacking stack. A pressing plate and a pipe tip positioning mechanism, wherein the pipe tip positioning mechanism comprises a pipe support member, a pipe tip positioning member, and a centering member operable to allow the bent portion of the hairpin pipe to pass therethrough. An assembly device for a cross-finch Uve heat exchanger characterized by: 2. A heat exchanger comprising a combination of a large number of plate fins and heat exchanger pipes, wherein the fins of the heat exchanger are stacked for stacking and then the fins have vertical plate surfaces. Assembling a cross-finch uve heat exchanger characterized in that the stacking employment is tilted at a right angle and the hairpin pipe is inserted into the fin insertion hole in a horizontal direction while sequentially positioning the hairpin pipe by the pipe tip positioning mechanism. .