JPH09182928A - Production of flat heat exchanging tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a size of production equipment as a whole by continuously make a metal sheet stock passing between a center work roll and all planetary work rolls so as to form a sheet like constituting member. SOLUTION: A device to produce a lower constituting member is provided with an uncoiler 31, in which an aluminum brazing sheet 30 having a brazing filler metal layer on one side is coiled so that the brazing filler metal layer comes to outer peripheral side, a preliminary rolling mill 32, finish rolling mill 33 and delivery roll 34. The aluminum brazing sheet 30 is delivered from the uncoiler 31, sent to the preliminary rolling mill 32, passed the preliminary rolling mill 32 and then sent to the finish rolling mill 33 subjecting to finish rolling, thus, the lower constituting member is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention manufactures components for a flat heat exchange tube used in a heat exchanger such as a car air conditioner condenser, a room air conditioner condenser, an automobile oil cooler, an industrial machine oil cooler and the like. The present invention relates to a method and a method for manufacturing a flat heat exchange tube using a component manufactured by this method.

In this specification, FIG. 1, FIG. 12 and FIG.
7, FIG. 20, FIG. 22, and FIG. 24 are referred to as upper and lower sides and left and right sides, respectively.

[0003]

2. Description of the Related Art Recently, for example, as a condenser for car cooler, as shown in FIG. 26, a pair of headers (121) (122) which are arranged in parallel to each other at intervals. And both ends have both headers (121)
(122) parallel flat refrigerant flow pipe connected to (123)
(The heat exchange pipe) and the adjacent refrigerant flow pipes (123) are arranged in the ventilation gap, and the corrugated fins (124) brazed to both the refrigerant flow pipes (123) and the left header ( 12
1) The inlet pipe (125) connected to the upper end of the peripheral wall, the outlet pipe (126) connected to the lower end of the peripheral wall of the right header (122), and the inside above the middle of the left header (121). The left partition plate (127) provided in the right header (122) and the right partition plate (128) provided in the lower part of the middle of the right header (122) are provided, and the inlet pipe (125) and the left partition plate are provided. Number of refrigerant distribution pipes (123) between (127), refrigerant distribution pipes (1) between left partition plate (127) and right partition plate (128)
23) and the number of refrigerant distribution pipes (123) between the right partition plate (128) and the outlet pipe (126) are gradually reduced from the top to form a passage group, and the flow from the inlet pipe (125) The vapor phase refrigerant, which has become a liquid phase from the outlet pipe (126), flows out,
A so-called multi-flow type capacitor (see Japanese Examined Patent Publication No. 3-45300), which is designed to flow in a meandering manner in each unit of a passage group, has improved performance and low performance in place of a conventional serpentine type capacitor. It has been widely used as a material that can realize pressure loss and ultra compactness.

Since the high-pressure gas refrigerant is introduced into the flat refrigerant flow pipe used for the condenser, pressure resistance is required. In order to meet this demand and increase the heat exchange efficiency, the refrigerant flow pipe is made of an aluminum hollow extruded shape having flat upper and lower walls and a reinforcing wall that extends over the upper and lower walls and extends in the length direction. Had been. By the way, in view of the improvement of the heat exchange efficiency and the downsizing of the condenser, it is desirable that the flat refrigerant flow pipe is thin and the height is as low as possible. However, in the case of extruded shapes, there is a limit in reducing the pipe height and reducing the wall thickness due to the restriction on the extrusion technique.

In order to solve this problem, therefore, the present applicant firstly proposed that the upper and lower walls, the left and right side walls extending over the left and right side edges of the upper and lower walls, and the upper and lower walls and extending in the lengthwise direction and extending mutually. A flat heat exchange tube comprising a plurality of reinforcing walls provided at predetermined intervals in a plate shape, which is formed by rolling a plate material, and in which a side wall forming portion and a reinforcing wall forming portion are integrally formed. A flat heat exchange tube manufactured by using the constituent members has been proposed (see JP-A-5-164484 and JP-A-6-281373).

However, the plate-shaped component of the flat heat exchange tube is manufactured by sequentially passing the metal base plate through a plurality of rolling mills, and the whole manufacturing facility is required to use the plurality of rolling mills. However, there is a problem that it becomes large.

An object of the present invention is to provide a method for manufacturing a flat heat exchange tube which solves the above problems.

[0008]

Means for Solving the Problems Claim 1 according to the present invention
The method of manufacturing a flat heat exchange tube of the above, the upper and lower walls, the left and right side walls that straddle the left and right side edges of the upper and lower walls, and the plurality of plurality of spanning the upper and lower walls and extending in the longitudinal direction at predetermined intervals. In the method of manufacturing a flat heat exchange tube consisting of the reinforcing wall of the central work roll and the periphery of the central work roll in a method of manufacturing using a plate-shaped component member in which the side wall forming part and the reinforcing wall forming part are integrally molded. A rolling mill equipped with a plurality of satellite work rolls arranged at intervals in the circumferential direction is used, and a sidewall forming portion forming annular groove is formed on the circumferential surface of either one of the work rolls of the rolling mill. And the annular groove for forming the reinforcing wall forming portion is provided over the entire circumference, and the plate-shaped component is formed by continuously passing the metal base plate between the central work roll and all satellite work rolls. Features It is intended.

According to the method of claim 1, a rolling mill provided with a central work roll and a plurality of satellite work rolls arranged around the central work roll at intervals in the circumferential direction is used, Since the annular groove for forming the side wall forming portion and the annular groove for forming the reinforcing wall forming portion are provided over the entire circumference on the peripheral surface of either one of the two work rolls, the metal base plate serves as the central work roll and all satellites. By continuously passing between the work roll and the work roll, a component in which the side wall forming part and the reinforcing wall forming part are integrally formed can be manufactured in one pass by this one rolling mill. Therefore, it is possible to reduce the size of the entire manufacturing facility without requiring a plurality of rolling mills as in the conventional case.

According to a second aspect of the present invention, in the method for manufacturing a flat heat exchange tube according to the first aspect, the flat heat exchange tube is formed in an upward ridge shape on the lower wall forming portion and the lower wall forming portion. It is manufactured by joining a plate-shaped lower constituent member composed of left and right side wall forming portions and a reinforcing wall forming portion integrally formed with each other, and a flat plate-shaped upper constituent member extending over both side wall forming portions of the lower constituent member. On both sides of the work roll of the rolling mill, the annular groove for forming both side wall forming parts and the annular groove for forming the reinforcing wall forming part are provided over the entire circumference, and the metal base plate is the central work roll. The lower component is formed by continuous passage between the above and all satellite work rolls.

Also according to the method of the second aspect, it is possible to reduce the size of the entire manufacturing facility without requiring a plurality of rolling mills as in the conventional case.

According to a third aspect of the present invention, in the method of manufacturing a component for a flat heat exchange tube according to the second aspect, the peripheral surface of one of the center work roll and the satellite work roll of the rolling mill is provided. The formed annular grooves for forming the reinforcing wall portion are made equal in depth, and the width of the annular groove for forming both side wall forming portions is made wider than that of the reinforcing wall forming annular groove. Equal to the depth of the reinforcing wall forming portion forming annular groove, further forming a narrow annular groove in the portion of the bottom surface of both side wall forming portion forming annular groove toward both axial ends of the work roll, over the entire circumference, Use a metal base plate with thick parts on both edges to equalize the wall thickness and height of all reinforcing walls of the lower component, and reinforce the wall thickness of both side wall forming parts. Greater than the wall thickness Ku, and equal to its height and the height of the reinforcing wall forming portion, is further than this outside in the width direction of the upper end of both side walls forming portion so as to form across the upwardly projecting walls thin in length. In this case, since the metal base plate having the thick-walled portions on both side edges is used, the metal of the thick-walled portion is sufficiently contained in the reinforcing-wall-forming-portion-forming annular groove and the narrow annular groove. The flow, the wall thickness and height of the reinforcing wall forming portion, and the wall thickness and height of the upward protruding wall can be molded as designed.

In the method for manufacturing the flat heat exchange tube described above,
The rolling mill is equipped with guide shoes arranged between adjacent satellite work rolls, and means for urging the guide shoes toward the center work roll, and both side edges of the guide shoes have the center work roll and the satellite work rolls. May get stuck in the roll. In this case, the elongation of the metal base plate in the length direction is suppressed while the metal base plate passes through the rolling mill, and the bulging from between the adjacent satellite work rolls is suppressed. Therefore, each groove formed in the central work roll is completely transferred to the metal base plate, and a constituent member having a desired shape is obtained.

In the method for manufacturing the flat heat exchange tube described above,
A notch may be formed in the supply wall forming portion. In this case, the flat wall heat exchange tube manufactured by using the obtained component has a communication hole formed in the reinforcing wall for connecting the adjacent fluid passages through the reinforcing wall. As a result, the fluid flowing through each fluid passage flows in the width direction of the flat heat exchange tube through the communication hole, is distributed over all the fluid passages, and is mixed, so that there is no temperature difference between the fluid passages. Therefore, the heat exchange efficiency is improved.

In the method for manufacturing the flat heat exchange tube described above,
Protrusions for forming notches are provided on the bottom surface of the annular groove for forming the reinforcing wall forming portion at intervals in the circumferential direction, and the metal plate is passed between the central work roll and all satellite work rolls. When molding a component, a notch may be simultaneously formed in the reinforcing wall forming portion. In this case, it is not necessary to form the notch in a step different from the step of forming the reinforcing wall forming portion, the number of steps is reduced, and the work is facilitated.

According to a seventh aspect of the present invention, in the method for manufacturing a flat heat exchange tube, the upper and lower walls, the left and right side walls extending over the left and right side edges of the upper and lower walls, and the upper and lower walls and extending in the lengthwise direction are mutually extended. In a method of manufacturing a flat heat exchange tube consisting of a plurality of reinforcing walls provided at predetermined intervals,
A lower component formed by the method according to claim 3 and a flat upper component are used, and both side edges of the upper component are placed on both side wall forming portions of the lower component and then projected upward. The present invention is characterized in that both constituent members are temporarily fixed by bending the wall inward, and then both constituent members are brazed.
According to this method, the brazed portions of both constituent members form a lap joint, so that the pressure resistance of the brazed portions is improved. Moreover, since both constituent members are brazed after being temporarily fixed, if this brazing is performed after the temporary fixing object, the heat exchanger header and the fins are combined, the heat exchanger can be manufactured in one operation. be able to.

According to the eighth aspect of the present invention, in the method for manufacturing a flat heat exchange tube, the upper and lower walls, the left and right side walls extending over the left and right side edges of the upper and lower walls, and the upper and lower walls and extending in the lengthwise direction are mutually extended. A flat heat exchange tube composed of a plurality of reinforcing walls provided at predetermined intervals is formed into a lower wall forming portion, left and right side wall forming portions integrally formed with the lower wall forming portion in an upwardly protruding shape, and reinforcing wall forming In a method of manufacturing by joining a plate-shaped lower constituent member composed of a portion and a flat plate-shaped upper constituent member that straddles both side wall forming portions of the lower constituent member, a central work roll, and a circumference thereof around the central work roll. Using a rolling mill provided with a plurality of satellite work rolls arranged at intervals in the direction, on the circumferential surface of either one of both work rolls of the rolling mill, both side wall forming part forming annular groove and Reinforcing wall forming part forming ring The grooves are provided over the entire circumference, and the depths of all the reinforcing wall forming portion forming annular grooves are made equal, and a plurality of notch forming convex portions are provided on the bottom surface of the grooves at circumferential intervals. Similarly, the width of the annular groove for forming both side wall forming portions is made wider than the width of the annular groove for forming the reinforcing wall portion, and the depth thereof is made equal to the depth of the annular wall forming portion for the reinforcing wall forming portion. A narrow annular groove is formed over the entire circumference on the bottom of the forming annular groove near the axial ends of the work roll, and a metal material with thick parts on both edges is used as the central work roll. By continuously passing between the satellite work rolls of
All the reinforcing wall forming parts have the same height, and a plurality of notches are formed in the upper edge of the reinforcing wall forming part at intervals in the lengthwise direction. It is larger than the wall thickness and its height is equal to the height of the reinforcing wall forming part, and the upper projecting wall, which is thinner than this, is formed over the entire width on the outer side in the width direction of the upper ends of both side wall forming parts. After forming the lower component member, placing both side edge portions of the flat upper component member on both side wall forming portions of the lower component member, and bending the upper projecting wall inward to temporarily fix both component members. At the same time, the upper component closes the opening of the notch of the reinforcing wall forming part, and then both components are brazed. According to this method, the brazed portions of both constituent members form a lap joint, so that the pressure resistance of the brazed portions is improved. Moreover, since both constituent members are brazed after being temporarily fixed, if this brazing is performed after the temporary fixing object, the heat exchanger header and the fins are combined, the heat exchanger can be manufactured in one operation. be able to.
Further, the reinforcing wall of the manufactured flat heat exchange tube is formed with a communication hole for communicating adjacent fluid passages via the reinforcing wall. As a result, the fluid flowing through each fluid passage flows in the width direction of the flat heat exchange tube through the communication hole, is distributed over all the fluid passages, and is mixed, so that there is no temperature difference between the fluid passages. Therefore, the heat exchange efficiency is improved.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
This will be described with reference to the drawings. In the following description, the term "aluminum" includes aluminum alloy in addition to pure aluminum. In addition, the same parts and the same parts will be denoted by the same reference symbols throughout the drawings, without redundant description.

Embodiment 1 This embodiment is shown in FIGS. 1 to 10.

1 to 3 show a flat heat exchange tube (A) manufactured in this embodiment.

1 to 3, a flat heat exchange tube (A)
Between the flat top and bottom walls (1) (2), the left and right side walls (3) (4) that straddle the left and right side edges of the top and bottom walls (1) (2), and the left and right side walls (3) (4). A plurality of reinforcing walls that straddle the upper and lower walls (1) and (2) and extend in the lengthwise direction and are provided at predetermined intervals.
(5) and has parallel fluid passages (6) inside.

The heat transfer area is respectively formed on the inner surface of the lower wall (2) between the left and right side walls (3) and (4) and the reinforcing wall (5) and the adjacent reinforcing walls (5). A plurality of ridges (7) extending in the lengthwise direction are integrally formed in the shape of an upward ridge for the purpose of increasing the distance. Further, the inner surface of the upper wall (1) is also preferably roughened for the purpose of increasing the heat transfer area, and for example, it is preferable to form ridges or grid-like irregularities extending in the length direction. The reinforcing wall (5) has a plurality of communication holes (8) through which the parallel fluid passages (6) pass. The communication holes (8) are arranged in a zigzag pattern when viewed from above. When the communication hole (8) is opened, the fluid flowing in each of the parallel fluid passages (6) flows in the width direction of the flat heat exchange tube (A) through the communication hole (8), and all the fluid flows. There is no temperature difference in the fluid between the fluid passages (6) due to mixing throughout the passages (6). Therefore, the heat exchange efficiency is improved. All communication holes in each reinforcing wall (5)
The aperture ratio, which is the ratio of (8), is preferably in the range of 10 to 40%, particularly 10 to 30%, and is preferably about 20%. In this case, the effect of improving the heat exchange efficiency by forming the communication hole (8) becomes remarkable. The pitch of the reinforcing wall (5) in the pipe width direction is 4
It is preferably less than or equal to mm. Further, the height of the reinforcing wall (5) is preferably set to 2 mm or less.

The flat heat exchange tube (A) is composed of an aluminum lower component (10) which constitutes the lower wall (2), left and right side walls (3) and (4) and a reinforcing wall (5), and an upper wall ( It is formed by the flat plate-shaped aluminum upper constituent member (20) which constitutes (1). The lower component (10) includes a flat lower wall forming part (11), both side wall forming parts (12) integrally formed in a rising shape on both side edges of the lower wall forming part (11), and a lower wall forming part. Side wall forming part (1)
2) A plurality of reinforcing wall forming portions (13) extending in the lengthwise direction which are integrally formed in a rising shape and at predetermined intervals from each other.
And the trapezoidal notches (14) are formed in the upper edge of the reinforcing wall forming part (13) at predetermined intervals in the lengthwise direction so as to be arranged in a zigzag pattern when viewed in a plan view. . Lower component (1
The height of both side wall forming portions (12) of (0) is equal to that of the reinforcing wall forming portion (13), and the thickness thereof is larger than that of the reinforcing wall forming portion (13). Further, an upward projecting wall (15) is integrally formed at the left and right outer portions of the upper ends of the side wall forming portions (12). Further, the ridge (7) is formed integrally with the lower wall forming portion (11). The upper surfaces of both side edges of the upper component (20) are inclined surfaces (21) inclined downward toward the outside. The lower component (10) is made of an aluminum brazing sheet having a brazing material layer (not shown) on the outer surface, that is, the lower surface of the lower wall forming portion (11) and the outer surfaces of both side wall forming portions (12). The upper component (20) is made of an aluminum brazing sheet having a brazing material layer (not shown) on both sides.

The upper protruding wall (15) of the lower component (10)
Is inwardly bent and engaged with both side edges of the upper component (20), and in this state, the upper end of the both side wall forming part (12) and the reinforcing wall forming part (13) are flat. The flat protruding heat exchange tube is formed by joining the bent upper protruding wall (15) to the inclined surface (21) of the upper component (20) while being joined to the member (20). In the communication hole (8), trapezoidal notches (14) provided at predetermined intervals on the upper edge of the reinforcing wall forming portion (13) of the lower component (10) are formed by the upper component (20). It is formed by closing the open part. In this case, multiple reinforcement walls
Since the communication holes (8) formed in (5) are staggered when viewed from the top, the joining of both constituent members (10) and (20) in the width direction of the flat heat exchange tube (A) is performed. Since the part exists, sufficient bonding strength is secured.

The flat heat exchange tube (A) is manufactured as follows.

First, the apparatus shown in FIGS. 4 to 6 is used to have a lower wall forming portion (11), both side wall forming portions (12) and a notch portion (14) as shown in FIGS. 7 and 8. Multiple reinforcing wall formations (1
3), lower component with upper protruding wall (15) and ridge (7)
Mold (10).

In FIG. 4, an apparatus for manufacturing the lower component (10) is such that an aluminum brazing sheet (30) (metal base plate) having a brazing material layer on one side is wound so that the brazing material layer surface is on the outer peripheral side. It is equipped with an uncoiler (31), a preliminary rolling mill (32), a finishing rolling mill (33) and a feed roll (34). Then, the aluminum brazing sheet (30) wound around the uncoiler (31) is fed from the uncoiler (31) and sent to the preliminary rolling mill (32), and the preliminary rolling mill (3
After passing through 2), the lower component (10) is molded by being sent to the finish rolling mill (33) for finish rolling.

As shown in FIG. 9, the pre-rolling mill (32) projects the opposite side of the brazing material layer of the aluminum brazing sheet (30) to form the thick portions (30a) on both side edges thereof. belongs to. Here, for example, the total width W of the lower component (10) to be molded is 18 mm, the wall thickness T of the lower wall forming portion (11) is 0.35 mm, and the height H of both side wall forming portions (12) is 1 mm. The wall thickness T1 is 1.4 mm, the height H1 of the upward protruding wall (15) is 0.65 mm, the wall thickness T2 is 0.4 mm, and the reinforcing wall forming portion is
The height H2 of (13) is 1 mm, the same thickness T3 is 0.4 mm, the pitch P between the reinforcing wall forming portions (13) is 0.8 mm, and the ridges are
The height H3 of (7) is 0.2 mm and the same thickness T4 is 0.2 mm.
, The width of the pre-rolled aluminum brazing sheet (30) is w, the width of the thick part (30a) is w1, and the thin part is
Assuming that the wall thickness of (30b) is t and the wall thickness of the thick portion (30a) is t1, w = 18 mm, w1 = 1.34 mm, t = 0.57.
mm, when t1 = 1.13 mm, w = 18 mm,
w1 = 1.49 mm, t = 0.62 mm, t1 = 1.1
9 mm and w = 18 mm, w1 = 1.6
When 3 mm, t = 0.68 mm, and t1 = 1.25 mm, the lower component (10) can be molded according to the above design dimensions.

In FIG. 9, the thick part (30a) is formed by projecting the side of the aluminum brazing sheet (30) opposite to the brazing material layer, but the brazing material layer side is the opposite. The thick portion may be formed by being projected, or the thick portion may be formed by being projected on both sides.

The finish rolling mill (33) has a central work roll (3
5) and a plurality of satellite work rolls (36) arranged around the center work roll (35) at equal intervals in the circumferential direction. The center work roll (35) is configured to be rotated by a driving unit (not shown). Each satellite work roll (36) is connected to the center work roll (35) by a gear device (not shown).
By rotating all satellite work rolls (36)
Rotates at the same peripheral speed as the central work roll (35). Incidentally, each satellite work roll (36) may be provided with a driving means so that the satellite work roll (36) can be rotated at a constant peripheral speed with the center work roll (35). The finishing mill (33) includes a trapezoidal guide shoe (37) between the adjacent satellite work rolls (36) and a spring (38) for urging the guide shoe (37) toward the center work roll (35). ). Both edges of the guide shoe (37) are at the center work roll (3
It is inserted between the satellite work roll (36) and the satellite work roll (36) and is in sliding contact with the satellite work roll (36). Guide shoe (37), aluminum brazing sheet (30)
While passing through the finishing mill (33), the aluminum brazing sheet (30) is suppressed from elongating in the longitudinal direction, and is prevented from bulging out between adjacent satellite work rolls (36). Suppression of the lengthwise extension of the aluminum brazing sheet (30) is also performed by rotating all satellite work rolls (36) at the same peripheral speed as the center work roll (35). As a result, the grooves (39) (40) (41) (42) described below formed in the central work roll (35) are completely transferred to the aluminum brazing sheet (30), and the lower structure having a desired shape is formed. A member (10) is obtained. Further, since the elongation in the length direction of the aluminum brazing sheet (30) is suppressed, the aluminum brazing sheet (30) which is a bare plate
As a material, a thin material can be used as compared with a plate material used as a base plate in the conventional method, and the material cost is reduced. In addition, the rolling reduction can be smaller than that of the conventional method.

As shown in FIGS. 5 and 6, on both sides of the central work roll (35) of the finish rolling mill (33), both side wall forming portion forming annular grooves (39) and reinforcing wall forming portion forming annular rings are formed. Groove (40)
Is provided over the entire circumference. At this time, the width and the depth of all the annular grooves (40) for forming the reinforcing wall forming portion are made equal. Further, the width of the both-side wall forming portion forming annular groove (39) is made wider than the width of the reinforcing wall portion forming annular groove (40), and the depth thereof is set to the depth of the reinforcing wall forming portion forming annular groove (40). Further, narrow annular grooves (41) are provided on the bottom surface of the both-sides wall forming portion forming annular groove (39) at portions near both axial ends of the central work roll (35) over the entire circumference. In addition, between the adjacent reinforcing wall forming portion forming annular grooves (40) on the peripheral surface of the central work roll (35) and between the reinforcing wall forming portion forming annular groove (40) and the side wall forming portion forming annular groove ( A plurality of annular grooves (42) for forming ridges are provided over the entire circumference between each of them and the groove (39). Further, the notch forming convex portion (43) is provided on the bottom surface of the reinforcing wall forming portion forming annular groove (40). Therefore, the aluminum brazing sheet (30) should be fitted with such a central work roll (35) and all satellite work rolls (36).
When it is continuously passed between the lower part and the lower part, the lower component (10) as shown in FIGS. 7 and 8 is molded. When passing through the finish rolling mill (33), the reinforcing wall forming part (13) is not always required.
It is not necessary to form the notch (14) at the same time in this case.In this case, the notch forming convex portion is formed on the bottom surface of the reinforcing wall forming portion forming annular groove (40) on the peripheral surface of the central work roll (35). There is no need to provide (43). At this time, the notch (14) is formed separately after passing through the finish rolling mill (33).

On the other hand, as shown in FIG. 8, from the aluminum brazing sheet whose both surfaces are covered with the brazing filler metal layer, the inclined surface (21) which is flat and inclined downward toward the outer side is formed on the upper surfaces of both side edge portions. The formed upper component (20) is molded.

Next, after degreasing the upper and lower constituent members (20) and (10), a brazing flux is applied to them.

Then, the both side edges of the upper component (20) are connected to the upper protruding walls on the upper surfaces of both side wall forming parts (12) of the lower component (10).
It is placed on a portion inside the (15) (see FIG. 10), and the upper projecting wall (15) of the lower component (10) is bent to form the upper component (20).
The two constituent members (10) and (20) are temporarily fixed by closely contacting them with the inclined surface (21). As shown in FIG. 11, such a work is performed by bending a pair of upper and lower forming rolls (8) for bending the upper protruding wall (15).
0) and a pair of upper and lower sandwiching rolls (81) for sandwiching the upper and lower constituent members (20) and (10) from the upper and lower sides, and the temporary fixing machine is continuously used.

Then, the temporarily fixed product is cut into a predetermined length by a shear to obtain a heat exchange tube intermediate product. The cutting is performed from the height direction of the intermediate product, that is, from above or below. This can prevent deformation of the reinforcing wall forming part (13). If the cutting is performed from the width direction of the intermediate product, that is, from the left side or the right side, the reinforcing wall forming portion (13) may be deformed.

Then, the heat exchange tube intermediate product is combined with a header or fins and brazed together. Then, the upper ends of both side wall forming portions (12) and the reinforcing wall forming portion (13) of the lower component (10) of the intermediate product are brazed to the lower surface of the upper component (20) and bent upward. The wall (15) is brazed to the inclined surface of the upper component (20) by a lap joint. Thus,
At the same time as the heat exchanger is assembled, the flat heat exchange tubes (A) are manufactured.

In the above, after the upper and lower constituent members (20) and (10) are temporarily fixed, they may be pre-brazed by a high frequency brazing method or the like. After the temporary fixing, the upper and lower constituent members (2
The 0) and (10) may be brazed to form a finished heat exchange tube, which may be combined with headers and fins when the heat exchanger is assembled.

Embodiment 2 This embodiment is shown in FIGS. 12 to 15.

12 and 13 show a flat heat exchange tube (A1) manufactured according to this embodiment.

12 and 13, the left and right side walls (50) and (51) of the flat heat exchange tube (A1) have a double structure.

The flat heat exchange tube has a lower wall (2) and left and right side walls.
(50) (51) and the lower component (60) made of aluminum that composes the reinforcing wall (5) and the upper component (70) made of aluminum that composes the upper wall (1) and the left and right side walls (50) (51). ) And are formed by.

Both side wall forming portions (61) of the lower component (60) and all reinforcing wall forming portions (13) have the same thickness and height. The outer surface of the connecting portion between the lower wall forming portion (11) of the lower component (60) and the side wall forming portions (61) is an inclined surface (62).
The upper constituent member (70) is formed integrally with a flat upper wall forming portion (71) in a hanging shape on both side edges of the upper wall forming portion (71), and both side wall forming portions of the lower constituent member (60) ( 61) Both side wall formations that overlap the outside
(72) (pendant wall). The width of the upper wall forming portion (71) of the upper constituent member (70) is slightly wider than the width of the lower constituent member (60), and is adapted to cover the lower constituent member (60). Upper component
The height of both side wall forming portions (72) of (70) is slightly higher than the height of both side wall forming portions (61) of the lower component (60). Also,
The outer surfaces of the lower end portions of the side wall forming portions (72) are inclined inwardly downward to facilitate bending.

Then, both side wall forming portions (7) of the upper component (70) are
The lower projecting member (60) in (2) is protruded inward from both side wall forming portions (61) and is bent inward to form the lower building member (6).
0) is engaged with the inclined surface (62), and in this state the lower component
The upper ends of both side wall forming parts (61) and the reinforcing wall forming part (13) of (60) are joined to the upper wall forming part (71) of the upper constituent member (70), and both constituent members (60) (70 ), The both side wall constituent members (61) and (72) are joined together, and the both side wall forming portions of the upper constituent member (70) are further joined.
The bent part of (72) is the inclined surface (6
The flat heat exchange tube (A1) is formed by being joined to 2). In this flat heat exchange tube (A1), left and right side walls (50) (51)
Has a double structure, the pressure resistance of this portion is improved.

The flat heat exchange tube (A1) is manufactured as follows.

First, by using the same apparatus shown in FIGS. 4 to 6 as that used in the first embodiment, the lower wall forming portion (11), the both side wall forming portions (61) and the cutting portion as shown in FIG. A lower component (60) having a plurality of reinforcing wall forming portions (13) having notches (14) and a ridge (7) is formed.

In this case, the device is not equipped with a pre-rolling mill (32) and therefore the finishing mill (33) is fed with a flat aluminum brazing sheet (30). Further, the width and depth of the annular grooves for forming both side wall forming parts and all the annular grooves for forming reinforcing wall forming parts provided on the peripheral surface of the central work roll (35) of the finish rolling mill (33) are set to be equal. At the same time, the connecting portion between the bottom surface of the annular groove for forming both side wall forming portions and the outer side surface is set as an inclined surface. Therefore, the aluminum brazing sheet (30) is used for such a central work roll (35).
When it is continuously passed between the satellite work roll 36 and all the satellite work rolls 36, the lower component 60 as shown in FIG. 14 is formed.

On the other hand, as shown in FIG. 14, an upper component having an aluminum brazing sheet whose both surfaces are covered with a brazing material layer and having an upper wall forming portion (71) and both side wall forming portions (72).
Mold (70).

Next, after degreasing the upper and lower constituent members (70) and (60), a brazing flux is applied to them.

Then, as shown in FIG.
Fitting (70) onto the lower component (60), bending the lower ends of both side wall forming parts (72) of the upper component (70) to make them adhere to the inclined surface (62) of the lower component (60), Both components (60) (70) are temporarily fixed. After that, in the same manner as in Embodiment 1, the flat heat exchange tube
(A1) is manufactured.

In the second embodiment, the upper component shown in FIG. 16 may be used. In FIG. 16, a thin wall portion (7) is formed at the lower end portion of the side wall forming portion (76) of the upper component (75).
7) is formed and the outer surface of the thin portion (77) is inclined inwardly downward, and this portion is easily bent. Then, the upper component (75) is replaced with the lower component (60)
The thin part (77) and then bend the thin part (77)
By closely contacting the inclined surface (62) of (0), both constituent members (6
0) and (75) are temporarily fixed.

Embodiment 3 This embodiment is shown in FIGS. 17 to 19.

FIG. 17 shows a flat heat exchange tube (A2) manufactured according to this embodiment.

In FIG. 17, the left side wall (85) of the flat heat exchange tube (A2) has a downward left side wall forming portion (85a) integrally formed on the left side edge of the upper wall (86) and a lower side wall forming portion (85a). It is formed by brazing the tips of the left side wall forming part (85b), which is integrally formed on the left side edge of the wall (87) in a rising shape, in a butt shape, and its outer surface is arcuate in cross section. Has become. The abutting part between the left side wall forming parts (85a) and (85b) has an oblique cross section in order to increase the brazing area. The right side wall (88) is formed integrally with the upper wall (86) and the lower wall (87), and has a circular arc shape projecting outward in its cross section. The reinforcing wall (89) includes a downward reinforcing wall forming portion (89a) integrally formed in a hanging shape on the upper wall (86), and a lower wall (8
The upward reinforcing wall forming part (8
It is formed by brazing the tips with 9b) in a butt shape. The communication holes (90) are spaced in the longitudinal direction at the lower edge of the downward reinforcement wall forming portion (89a) of the upper wall (86) and the upper edge of the upward reinforcement wall forming portion (89b) of the lower wall (87). It is formed by aligning a pair of notched portions (90a) (90b) provided with a gap. In this case as well, the communication holes (90) formed in the plurality of reinforcing walls (89) are in a staggered arrangement when seen in a plan view. The opening ratio, which is the ratio of all the communication holes (90) in each reinforcing wall (89), is 10 to 4
It is 0%, preferably 10 to 30%, desirably about 20%.

In the flat heat exchange tube (A2), one plate-shaped member made of an aluminum brazing sheet having a brazing material layer on both sides is bent like a hairpin at the center of the width, and both left side wall forming portions ( It is formed by brazing 85a) and (85b) and reinforcing wall forming parts (89a) and (89b) in a butt state.

The flat heat exchange tube (A2) is manufactured as follows.

First, using the same apparatus shown in FIGS. 4 to 6 as that used in the first embodiment, an aluminum brazing sheet having brazing material layers on both sides is used to form an upper wall forming portion (see FIG. 18). 91), a flat connecting part (9
2) a lower wall forming portion (93) connected through, left side wall forming portions (85a) (85b) integrally formed on both side edges in upward ridges, respectively,
And a plurality of reinforcing walls integrally formed in the upper and lower wall forming portions (91) and (93) so as to be bilaterally symmetrical with respect to the connecting portion (92) and having notches (90a) and (90b). Forming part
A plate-shaped component member (94) including (89a) and (89b) is molded.

In this case, as shown in FIG. 19, the peripheral surface of the central work roll (35) of the finish rolling mill (33) of the above-mentioned device is made to match the cross sectional shape of the constituent member (94), as shown in FIG. An annular groove (95) (96) for forming the left side wall forming portion and an annular groove (97) for forming the reinforcing wall forming portion are provided in advance. At this time, the bottom surface of the one left side wall forming part forming annular groove (95) is inclined toward the center side toward the outside, and the bottom side of the other left side wall forming part forming annular groove (96) is directed to the outside. Incline outward in the radial direction. Further, a notch forming convex portion (99) is provided on the bottom surface of the reinforcing wall forming portion forming annular groove (97). Satellite work roll
Outward flanges (98) whose inner surfaces are curved outward in the radial direction are provided at both ends of (36). Further, the above-mentioned apparatus does not include the pre-rolling mill (32), and therefore, the flat aluminum brazing sheet is fed to the finish rolling mill (33). Place the aluminum brazing sheet on the central work roll (35) and all satellite work rolls (3
When it is continuously passed between 6) and 6), a component (94) as shown in FIG. 18 is molded.

Then, after degreasing the constituent member (94), a brazing flux is applied.

Thereafter, the constituent member (94) is bent at the connecting portion (92) into a hairpin shape, and both left side wall forming portions (85a) (85b) and the reinforcing wall forming portions (89a) (89b) are butted. Braze. Thus, the flat heat exchange tube (A2) is manufactured.

Embodiment 4 This embodiment is shown in FIGS. 20 and 21.

FIG. 20 shows a flat heat exchange tube (A3) manufactured by this embodiment.

In this case, the reinforcing wall (100) in the flat heat exchange tube (A3) has a downward wall forming portion (100a) integrally formed in an inwardly protruding shape with respect to the upper wall (86). (87) The upper wall (86) is formed by being joined to the inner surface, and the upward reinforcing wall forming portion (100b) integrally formed inward from the lower wall (87).
There are two types, one bonded to the inner surface, and the other two are arranged alternately. The communication hole (101) is a notch formed in the lower edge of the downward facing reinforcing wall forming portion (100a) and the upper edge of the upward facing reinforcing wall forming portion (100b) at predetermined intervals in the longitudinal direction. The (101a) and (101b) are formed by closing the open part of one of the upper and lower walls (86) and (87). In this case as well, the communication holes (101) formed in the plurality of reinforcing walls (100) are in a staggered arrangement when seen in a plan view. Also, the opening ratio, which is the ratio of all the communication holes (8) in each reinforcing wall (100), is 10 to 40%, preferably 10%.
It is about 30%, preferably about 20%. Other configurations are the same as those of the flat heat exchange tube (A2) manufactured in the third embodiment.

The flat heat exchange tube (A3) is manufactured as follows.

First, using an apparatus similar to that used in Embodiment 1 shown in FIGS. 4 to 6, from an aluminum brazing sheet having brazing material layers on both sides, an upper wall forming portion (shown in FIG. 21) is formed. 91), a flat connecting part (9
2) a lower wall forming portion (93) connected through, left side wall forming portions (85a) (85b) integrally formed on both side edges in upward ridges, respectively,
And a plurality of upper and lower wall forming portions (91) and (93) integrally formed in the shape of upward ridges and having notches (101a) and (101b) so as to deviate from the connecting portion (92) to the left and right by 1/2 pitch. The plate-shaped component member (10a) provided with the reinforcing wall forming portions (100a) (100b)
2) Mold.

In this case, on the peripheral surface of the central work roll (35) of the finish rolling mill (33) of the above apparatus, the left side wall forming portion forming annular shape is formed so as to match the transverse sectional shape of the constituent member (102). The groove and the annular wall for forming the reinforcing wall forming portion are provided. And
Aluminum brazing sheet, center work roll
By continuously passing between (35) and all satellite work rolls (36), a component as shown in FIG. 21 is formed.

Then, after degreasing the constituent member (102), a brazing flux is applied.

Thereafter, the constituent member (102) is bent at the connecting portion (92) into a hairpin shape, and both left side wall forming portions (85a) (85b) are butted to each other and brazed together, and the reinforcing wall forming portion (100
The tip of a) (100b) is brazed to either one of the upper and lower wall forming parts (91) (93). Thus, the flat heat exchange tube (A3) is manufactured.

Embodiment 5 This embodiment is shown in FIGS. 22 and 23.

FIG. 22 shows a flat heat exchange tube (A4) manufactured by this embodiment.

In this case, the reinforcing wall (105) in the flat heat exchange tube (A4) has a downwardly facing reinforcing wall forming portion (105a) formed integrally with the upper wall (86) in an inwardly protruding shape. (87) It is formed by being joined to the inner surface. The communication hole (106) has a notch (106a) provided at a lower edge of the downward facing reinforcing wall forming portion (105a) at a predetermined interval in the longitudinal direction, and the open portion of the lower wall (87) is closed. It is formed by peeling. In this case as well, the communication holes (106) formed in the plurality of reinforcing walls (105) are in a staggered arrangement when seen in a plan view. The opening ratio, which is the ratio of all the communication holes (106) in each reinforcing wall (105), is also 10 to 40%, preferably 10 to 30%, and desirably about 20%. Other configurations are the same as those of the flat heat exchange tube (A2) manufactured in the third embodiment.

The flat heat exchange tube (A4) is manufactured as follows.

First, using an apparatus similar to that used in Embodiment 1 shown in FIGS. 4 to 6, from an aluminum brazing sheet having brazing material layers on both surfaces, an upper wall forming portion (shown in FIG. 23) is formed. 91), a flat connecting part (9
2) a lower wall forming portion (93) connected through, left side wall forming portions (85a) (85b) integrally formed on both side edges in upward ridges, respectively,
And, the plate-shaped component (107) is formed in the upper wall forming part (91) integrally with the upward protruding shape and is provided with a plurality of reinforcing wall forming parts (105a) having the notches (106a).

In this case, on the peripheral surface of the central work roll (35) of the finish rolling mill (33) of the above-mentioned device, the left side wall forming portion forming annular shape is formed so as to match the cross sectional shape of the constituent member (107). The groove and the annular wall for forming the reinforcing wall forming portion are provided. And
Aluminum brazing sheet, center work roll
(35) and all the satellite work rolls (36) are continuously passed so that the components (1
07) is molded.

Then, after degreasing the constituent member (107), a brazing flux is applied.

Thereafter, the constituent member (107) is bent into a hairpin at the connecting portion (92), the left wall forming portions (85a) and (85b) are butted to each other and brazed together, and the reinforcing wall forming portion (105) is formed.
The tip of a) is brazed to the lower wall forming part (93). Thus, the flat heat exchange tube (A4) is manufactured.

Embodiment 6 This embodiment is shown in FIGS. 24 and 25.

FIG. 24 shows a flat heat exchange tube (A5) manufactured by this embodiment.

In FIG. 24, the right side wall (110) of the flat heat exchange tube (A5) has a downward facing right side wall forming portion (110a) integrally formed on the right side edge of the upper wall (86) and a lower side. An upward right wall forming portion (110b) integrally formed on the right edge of the wall (87) in a rising shape.
It is formed by brazing the tip portions of and with each other in a butt shape. Other configurations are the same as those of the flat heat exchange tube (A2) manufactured in the third embodiment. Therefore, the flat heat exchange tube (A5) includes an upper wall forming part (111), downward left and right side wall forming parts (85a) (110a), and a cutout part (90).
a) having a plurality of downward reinforcing wall forming portions (89a) having a), a lower wall forming portion (113), upward left and right side wall forming portions (85b) (110b), and notches ( 90b) having a plurality of upwardly facing reinforcing wall forming portions (89b) and a lower component (1
14) consists of.

The flat heat exchange tube (A5) is manufactured as follows.

First, using two devices similar to those used in Embodiment 1 as shown in FIGS. 4 to 6, from an aluminum brazing sheet having brazing material layers on both sides, as shown in FIG. The upper and lower constituent members (112) (114) are molded.

In this case, the finish rolling mill of the one of the above devices
On the peripheral surface of the central work roll (35) of (33), the upper component (1
An annular groove for forming the left side wall forming portion and an annular groove for forming the reinforcing wall forming portion are provided so as to match the cross-sectional shape of 12).
Further, on the peripheral surface of the central work roll (35) of the finish rolling mill (33) of the other device, a left side wall forming portion forming annular groove is formed so as to match the cross sectional shape of the lower component (114). An annular groove for forming the reinforcing wall forming portion is provided. Then, place the aluminum brazing sheet on the center work roll (35) of both devices.
By continuously passing it between the satellite work roll (36) and all satellite work rolls (36), the upper and lower constituent members (1
12) Mold (114).

Next, after degreasing the upper and lower constituent members (112) (114), a brazing flux is applied.

After that, the upper and lower constituent members (112) and (114) of the left and right side wall forming portions (85a) (85b) (110a) (110b) and the reinforcing wall forming portions (89a) and (89b) are connected to each other. Match and braze. Thus, the flat heat exchange tube (A5) is manufactured.

In the flat heat exchange tubes of Embodiments 3 to 6, the ridges are formed on the inner surfaces of the upper and lower walls in the same manner as the flat heat exchange tubes of Embodiments 1 and 2 for the purpose of increasing the heat transfer area. It may be formed.

In Embodiments 2 to 6 above, the aluminum brazing sheet is passed through the finish rolling mill to form the component having the reinforcing wall forming portion, and at the same time the notch portion is formed. You may shape | mold in a separate process, after shape | molding the structural member which has a reinforcement wall formation part.

In all the above-mentioned embodiments, various annular grooves are formed on the central work roll (35) of the finish rolling mill, but instead of this, various annular grooves are formed on the satellite work roll (36). May be.

[0087]

As described above, according to the method for manufacturing the flat heat exchange tube of the first aspect of the present invention, the size of the manufacturing equipment as a whole can be reduced as described above.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a flat heat exchange tube manufactured by a method according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is a view schematically showing an apparatus for producing a lower component of the flat heat exchange tube of FIG. 1;

FIG. 5 is an enlarged sectional view taken along line VV of FIG.

FIG. 6 is a partially enlarged perspective view showing the peripheral surface of the central roll of the apparatus of FIG. 4 in a developed manner.

7 is a cross-sectional view of a lower component of the flat heat exchange tube of FIG.

FIG. 8 is a partially enlarged perspective view showing a state in which an upper constituent member and a lower constituent member are combined in the method of the first embodiment.

9 is an enlarged cross-sectional view of an aluminum brazing sheet rolled by a preliminary rolling mill of the apparatus of FIG.

FIG. 10 is a transverse cross-sectional view showing a state in which an upper constituent member and a lower constituent member are combined in the method of the first embodiment.

FIG. 11 is a perspective view showing an apparatus for temporarily fixing the upper constituent member and the lower constituent member in the method of the first embodiment.

FIG. 12 is a cross-sectional view of a flat heat exchange tube manufactured by the method of Embodiment 2 of the present invention.

13 is a partially enlarged view of FIG.

FIG. 14 is a partially enlarged perspective view showing a state in which an upper constituent member and a lower constituent member are combined in the method of the second embodiment.

FIG. 15 is a cross-sectional view showing a state in which an upper constituent member and a lower constituent member are combined in the method of the second embodiment.

16 is a partially enlarged cross-sectional view showing a modified example of the upper component used in the method of Embodiment 2. FIG.

FIG. 17 is a cross-sectional view of a flat heat exchange tube manufactured by the method of Embodiment 3 of the present invention.

FIG. 18 is a perspective view showing constituent members of the flat heat exchange tube of FIG. 17.

19 is a cross-sectional view corresponding to FIG. 5 of a finish rolling mill for manufacturing the constituent members of FIG. 18.

FIG. 20 is a cross-sectional view of a flat heat exchange tube manufactured by the method of Embodiment 4 of the present invention.

21 is a perspective view showing components of the flat heat exchange tube of FIG. 20. FIG.

FIG. 22 is a transverse cross-sectional view of a flat heat exchange tube manufactured by the method of Embodiment 5 of the present invention.

23 is a perspective view showing constituent members of the flat heat exchange tube of FIG. 22. FIG.

FIG. 24 is a transverse cross-sectional view of a flat heat exchange tube manufactured by the method of Embodiment 6 of the present invention.

FIG. 25 is a perspective view showing upper and lower constituent members of the flat heat exchange tube of FIG. 24.

FIG. 26 is a front view of a condenser in which a flat refrigerant flow pipe (heat exchange pipe) is used.

[Explanation of symbols]

(1) (86) Upper wall (2) (87) Lower wall (3) (50) (85) Left side wall (4) (51) (88) (110) Right side wall (5) (89) (100) (105) Reinforcing wall (10) (60) (114) Lower component (11) (93) (113) Lower wall forming part (12) (61) Both side wall forming part (13) (89a) (89b) ( 100a) (100b) (105a) Reinforcement wall forming part (20) (70) (75) (112) Upper component (30) Blazing sheet (metal base plate) (33) Finishing mill (35) Central work roll ( 36) Satellite work roll (39) (95) (96) Side wall forming annular groove (40) (97) Reinforcing wall forming annular groove (85a) (85b) Left side wall forming (91) Upper wall Forming part (94) (102) (107) Component (110a) (110b) Right side wall forming part (A) (A1) (A2) (A3) (A4) (A5) Flat heat exchange tube

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Hozumi 6-224 Kaiyamacho, Sakai City, Showa Aluminum Co., Ltd. (72) Inventor Masashi Sakaguchi 6-224, Kaiyamacho, Sakai City Showa Aluminum Co., Ltd. ( 72) Inventor ▲ Tsuru ▼ Yukihiro Mi, 6-224, Kaiyamacho, Sakai City, Showa Aluminum Co., Ltd.

Claims (8)

[Claims] 1. An upper and lower wall, left and right side walls extending over both left and right edges of the upper and lower walls, and a plurality of reinforcing walls extending over the upper and lower walls and extending in the longitudinal direction at predetermined intervals. In a method for manufacturing a flat heat exchange tube by using a plate-shaped component in which a side wall forming portion and a reinforcing wall forming portion are integrally formed, a center work roll and a circumferential space around the center work roll are provided. Using a rolling mill equipped with a plurality of satellite work rolls that are arranged in place, on one circumferential surface of either of the work rolls of the rolling mill, a side wall forming annular groove and a reinforcing wall forming part forming An annular groove for the entire circumference is provided, and a plate-shaped component is formed by continuously passing a metal base plate between the central work roll and all satellite work rolls. Exchange tube Manufacturing method. 2. A flat heat exchange tube, and a plate-shaped lower component member comprising a lower wall forming portion, left and right side wall forming portions integrally formed on the lower wall forming portion in an upwardly protruding shape, and a reinforcing wall forming portion. , A flat plate-shaped upper member that straddles both side wall forming parts of the lower component is joined to produce, and both side wall forming parts are formed on the peripheral surface of either one of both work rolls of the rolling mill. An annular groove and an annular groove for forming a reinforcing wall forming portion are provided over the entire circumference, and the lower component is formed by continuously passing a metal plate between the central work roll and all satellite work rolls. Item 2. A method for manufacturing a flat heat exchange tube according to Item 1. 3. All of the annular wall grooves for forming the reinforcing wall forming portion formed on the peripheral surface of one of the center work roll and the satellite work roll of the rolling mill have the same depth, and both side wall formations are performed. The width of the part forming annular groove is made wider than the width of the reinforcing wall part forming annular groove, and its depth is made equal to the depth of the reinforcing wall forming part forming annular groove, and further, both side wall forming part forming annular grooves are formed. A narrow annular groove is formed over the entire circumference in a portion of the bottom surface close to both ends in the axial direction of the work roll, and a metal base plate having thick portions on both side edges is used. The heights of all the reinforcing wall forming parts are made equal, the wall thickness of both side wall forming parts is larger than the wall thickness of the reinforcing wall forming part, and the height is equal to the height of the reinforcing wall forming part. The widthwise outside of the upper edge of the wall forming part 3. The method for manufacturing a flat heat exchange tube according to claim 2, wherein the thin upper protruding wall is formed over the entire length. 4. The rolling mill comprises guide shoes arranged between adjacent satellite work rolls, and means for urging the guide shoes toward the center work roll, and both side edges of the guide shoes are centered. The method for manufacturing a flat heat exchange tube according to claim 1, wherein the flat heat exchange tube is inserted between the work roll and the satellite work roll. 5. The method for manufacturing a flat heat exchange tube according to claim 1, wherein a notch is formed in the reinforcing wall forming portion. 6. A notch forming convex portion is provided on the bottom surface of the reinforcing wall forming portion forming annular groove at intervals in the circumferential direction, and a metal base plate is provided between the center work roll and all satellite work rolls. The method for manufacturing a flat heat exchange tube according to claim 5, wherein a notch is formed in the reinforcing wall forming portion at the same time when the component is formed by passing it between them. 7. An upper and lower wall, left and right side walls extending over both left and right edges of the upper and lower walls, and a plurality of reinforcing walls extending over the upper and lower walls and extending in the longitudinal direction at predetermined intervals. A method for manufacturing a flat heat exchange tube, wherein a lower component formed by the method according to claim 3 and a flat upper component are used, and both side edges of the upper component are provided on both sides of the lower component. A method for manufacturing a flat heat exchange tube, which comprises temporarily mounting both constituent members by bending the upward projecting wall inward after placing on the wall forming portion, and then brazing both constituent members. 8. An upper and lower wall, left and right side walls extending over both left and right side edges of the upper and lower walls, and a plurality of reinforcing walls extending over the upper and lower walls and extending in the longitudinal direction at predetermined intervals. A flat heat exchange pipe, a lower wall forming portion, a plate-shaped lower constituent member consisting of left and right side wall forming portions integrally formed in the lower wall forming portion in the shape of upward ridges, and a reinforcing wall forming portion; In the method of manufacturing by joining a flat plate-shaped component member that straddles both side wall forming parts, a center work roll and a plurality of satellite work rolls arranged around the center work roll at intervals in the circumferential direction thereof. Using a rolling mill equipped with, the annular groove for forming both side wall forming parts and the annular groove for forming reinforcing wall forming parts are provided on the peripheral surface of either one of both work rolls of the rolling machine over the entire circumference. Forming all reinforced walls The annular grooves for forming are made equal in depth, and a plurality of notch forming convex portions are provided on the bottom surface of the grooves at intervals in the circumferential direction. The width is made wider than the width of the part forming annular groove, and its depth is made equal to the depth of the reinforcing wall forming part forming annular groove. By forming a narrow annular groove over the entire circumference in a part and continuously passing a metal material with thick parts on both side edges between the central work roll and all satellite work rolls , The heights of all the reinforcing wall forming portions are equal, and a plurality of notches are formed in the upper edge of the reinforcing wall forming portions at intervals in the lengthwise direction, and the wall thicknesses of both side wall forming portions are equal to each other. Is larger than the wall thickness of Has a height equal to the height of the reinforcing wall forming portion, and further, a lower component member in which an upper protruding wall that is thinner than this is formed over the entire length on the outer side in the width direction of the upper ends of both side wall forming portions is molded, After placing both side edges of the flat plate-shaped upper component on both side wall forming parts of the lower component, bend the upward projecting wall inward to temporarily fix both components and form a reinforcing wall by the upper component. Close the open part of the notch part of the part,
After that, both components are brazed to each other, and a method for manufacturing a flat heat exchange tube.