KR100254591B1 - A method of making a brazeable metal pipe having tube-insertion apertures formed with guide lugs - Google Patents

Abstract

A metal pipe for soldering, which has a guide member projecting in parallel with the tube on the at least one side edge of the elliptical tubular insertion hole in the shorter direction, does not require a boring mold having a complicated shape. It can be manufactured without the occurrence of crushing or deformation.

In the first manufacturing method, the strip-shaped platelet 30 having the press-fitted portion is bent into a cross-sectional uneven shape to form an arc portion 39, and pressurizes inward to form the bulging portion 42. Subsequently, the tubing insertion hole 5 is bored by carrying out a punching process in a state in which at least one side portion in the shorter direction of the diameter of the bulging portion 42 remains. Next, the non-circular portions 40 and 40 except for the arc portion 39 are bent to form a pipe having a shape opposite to both side edges. According to the second manufacturing method, the lower hole 31 corresponding to the tube insertion hole is formed in the strip-shaped plated plate 30 in a state in which the protrusion 32 for forming the guide member is left on the side edge of the shorter diameter direction. do. The band-shaped platen plate 30 is bent to form an arc portion 39, and the guide member forming protrusions 32 are formed by bending to form a guide member, and the non-arc portion 40 is bent. By the above method, a perforated mold having a complicated shape becomes unnecessary, and can be manufactured without causing collapse or deformation of the tube wall.

Description

Manufacturing method of soldering metal pipe having guide member in tubing insertion hole

(Figs. 1 to 31 are the first embodiment.)

FIG. 1 is a perspective view showing the header pipe and the tub of the heat exchanger used by using the soldering pipe produced according to the present invention as a header pipe, and the tube separately.

FIG. 2A is a front view of the heat exchanger shown in FIG.

FIG. 2B is a plan view of the heat exchanger shown in FIG.

3 is a cross-sectional view taken along line 3-3 of FIG. 2A.

4 is a cross-sectional view taken along the line 4-4 of FIG. 2A.

5 is a cross-sectional view taken along line 5-5 of FIG. 2A.

6 is a longitudinal sectional view of a soldering pipe produced in accordance with the present invention.

7 is a cross-sectional view taken along line 7-7 of FIG.

FIG. 8 is a front view of the soldering pipe of FIG. 6.

FIG. 9 is a rear view of the soldering pipe of FIG. 6.

10 is a perspective view of a strip-shaped molded platen as a raw material of the soldering pipe.

11 is a cross-sectional view taken along line 11-11 of FIG.

12 is a perspective view of a state in which a thick relief hole is provided in a strip-shaped plated plate.

FIG. 13 is a perspective view of a state in which a press-fitting part is formed on a strip-shaped molded plate.

14 is a cross-sectional view taken along line 14-14 of FIG.

FIG. 15 is a plan view of a state where a recess for inserting a partition plate or a recess for connecting a refrigerant inlet pipe is provided in a molded platelet.

FIG. 16 is a cross-sectional view of a state where the surface is formed on both edges in the width direction of the molded platelet.

17 is a perspective view after the arc portion is formed.

18 is a perspective view after formation of a bulge portion by throttling.

19 is a cross-sectional view taken along the 19-19 line in FIG.

20 is a sectional view taken along the 20-20 line in FIG.

21 is a perspective view after drilling the tube insertion hole.

22 is a cross-sectional view taken along the 22-22 line in FIG.

23 is a cross-sectional view taken along the 23-23 line in FIG.

24 is a cross-sectional view after the reverse V-shaped bending process.

25 is a cross-sectional view after the reverse U type bending process.

FIG. 26 is a cross-sectional view after the pipe is formed.

FIG. 27 is a perspective view of a state in which a leading thickness relief hole is formed on one long brazing sheet.

FIG. 28 is a perspective view after transferring the brazing sheet of FIG. 27 and performing the next step.

FIG. 29 is a perspective view after transferring the brazing sheet to perform the next step.

30 and 31 are perspective views before the pipe separating step is performed.

(Figures 32 to 55 are the second embodiment.)

Fig. 32 is a perspective view showing the header pipe and the tub of the heat exchanger used by using the soldering pipe produced by the present invention as the header pipe.

FIG. 33A is a front view of the heat exchanger shown in FIG.

33B is a plan view of the heat exchanger shown in FIG.

34 is a sectional view taken along the 34-34 line in FIG. 33A.

35 is a sectional view taken along the 35-35 line in FIG. 33A.

36 is a cross-sectional view taken along line 36-36 of FIG. 33A.

37 is a longitudinal cross-sectional view of the soldering pipe produced in accordance with the present invention.

38 is a cross-sectional view taken along the 38-38 line in FIG.

FIG. 39 is a front view of the soldering pipe of FIG.

40 is a rear view of the soldering pipe of FIG. 37.

FIG. 41 is a perspective view of a strip-shaped plated plate as a raw material of a soldering pipe.

42 is a cross-sectional view taken along the 42-42 line in FIG.

43 is a perspective view of a state in which a lower hole is drilled and installed in the strip-shaped plated plate.

44 is a sectional view taken along the 44-44 line in FIG.

45 is a cross-sectional view of a state where the surface is formed on both edges in the width direction of the strip-shaped plated plate.

FIG. 46 is a plan view of a state in which a partition plate is inserted into a molded platelet and a coolant inlet pipe connection hole is provided.

47 is a perspective view after the arc portion is formed.

48 is a cross-sectional view after the V-shaped bending process.

49A is a cross-sectional view after the guide member is formed by a burring process.

49B is a cross-sectional view along a 49-49 line in a.

50 is a cross-sectional view after the U-shaped bending process.

51 is a cross-sectional view after molding into a pipe.

FIG. 52 is a perspective view of a state in which a leading strip-shaped platelet is formed on one long brazing sheet.

FIG. 53 is a perspective view after transferring the brazing sheet of FIG. 52 to perform the next step.

54 and 55 degrees is a perspective view before performing a pipe separation process.

[Industrial use]

This invention is suitable as a header pipe of a heat exchanger such as a condenser for air conditioners, radiators, evaporators, etc., which is manufactured by a soldering metal pipe made of aluminum (containing an alloy thereof) or the like. It relates to a method of manufacturing a metal pipe for soldering holding a guide member in the tubing insertion hole used to make.

[Prior art]

For example, as the heat exchanger described above, an elliptical flat shape having a plurality of cross sections in a pair of hollow header pipes 3 and 4 arranged in parallel, as shown in a and b of FIG. 2. The so-called parallel flow type in which the tubs 1 are connected in a parallel shape and connected to the header pipe, and a fin 2 is disposed between the adjacent tubs 1 and 1. There is a heat exchanger called.

As the above-described header pipes 3 and 4 of the heat exchanger, a brazing sheet coated with a solder material layer on one or both surfaces of the core is generally formed in a pipe shape. The one in which a plurality of elliptical tube insertion holes are arranged in line with the cross section of the tube in the longitudinal direction of the pipe is used.

Then, the tube 1 is inserted into the tube insertion hole of the header pipes 3 and 4, and the header pipes 3 and 4 and the tube 1 are joined by soldering. have.

Conventionally, the header pipe as described above was manufactured by drilling and installing a tube insertion hole in a sealing pipe made of a brazing sheet, and the pipe was pressed because the drilling was carried out in a pipe state. It was easy to be crushed or deformed.

Therefore, in order to solve the above-mentioned shortcomings, the present applicant bends and forms a part of the widthwise or longitudinal direction of the strip-shaped platelet composed of a brazing sheet in an arc shape in cross section, and then drills a hole in the circular arc to form a tube. By forming a woofer insertion hole and then forming a shape in which both edges of the molding material are opposed to each other, a manufacturing method of a soldering pipe to be molded into a pipe has been proposed (Japanese Patent Application No. 3-18982).

According to this method, a perforation can be carried out in a state where a supporting frame of a shape conforming to the circular arc portion is supported from one side of the circular arc portion, eliminating crushing and deformation of the pipe wall, and manufacturing a pipe with high precision. The desired effect was as good as possible.

However, in the above-described manufacturing method of the brazing metal pipe, the advantage can be best obtained when the tubular insertion hole has a simple shape such as an elliptical shape. However, in recent years, the simple shape as described below will be described. In some cases, the necessity of drilling holes rather than the above occurs, and in such a case, the following new problems arise.

In other words, in recent years, the tube insertion hole provided in the header pipe can be easily facilitated and smoothed, the shaking after insertion can be eliminated, and the connection area between the tube and the header pipe can be increased. For the purpose, as shown in FIG. 1, the guide member 7 which protrudes in parallel with the insertion tube 1 to the side edge of at least one side of the elliptical tube insertion hole 5 is short in the direction. The installation has been carried out.

Thus, in order to form such a guide member 7, first, a lower hole having a guide portion forming flesh portion formed at the side edge of the elliptical diameter in the short direction is laid, and then a burring is made in this lower hole. It is considered to protrude the meat portion in the thickness direction by performing the machining and to use it as a guide member.

However, in order to drill a lower hole which is formed by bending a portion of the strip-shaped platelets into a circular arc shape in cross section, a blade which is coincided with the lower hole shape when viewed from the bottom in a punched shape and conforms to the arc surface when viewed from the side ( The use of a three-dimensional shape holding the part) must be used, which results in a new problem that the machining of perforated molds is complicated and the cost is high or the blade parts are easily damaged or worn.

The present invention has been made in view of the above technical background, and has an elliptical tubular insertion hole, and a guide in which the diameter of the tube insertion hole protrudes in equilibrium with the insertion tube on at least one side edge in the shorter direction. It is an object of the present invention to provide a manufacturing method therefor for the purpose of allowing a brazing metal pipe for holding a member to be manufactured without a perforated mold having a complicated shape and without the occurrence of deformation caused by pressing distortion of the tube wall.

[Summary of invention]

In order to achieve the above object, the present invention is basically a step of bending a part of a strip-shaped plated plate into an arc cross section in the same manner as the above-mentioned proposal, and a step of performing a punching operation on the arc portion; In addition, while adopting a sequential implementation of a process of forming a pipe into a shape opposite to both edges of a molded platelet, a new study has been conducted to eliminate the perforation of the lower hole of a complicated shape.

That is, the structure which is the 1st characteristic concerning this invention has the elliptical tubular insertion hole 5 so that it may display with reference to the code | symbol of the figure, and the diameter of the tubular insertion hole 5 is shorter direction. In the manufacturing method of the metal pipe for soldering which has the guide member 7 which protrudes in parallel with the insertion tube 1 in at least one side edge of the side, the solder material layer ( A step of forming a circular arc portion 39 by bending a part of the width direction or the longitudinal direction of the strip-shaped plated plate 30 made of a brazing sheet to which 30b) is deposited, in an arc cross section. The diameter of the bulging part is shorter in the bulging part 42 formed by the bulging process of the tube insertion hole formation predetermined part in the circular arc part 39 in the bulging shape in the thickness direction, and the aforementioned throttling process. At least one side of the direction In which the drilling process is carried out in the state where it remains, and the elliptical tubular insertion hole 5 is installed, and the non-circular part 40 except for the circular arc part 39 in the aforementioned strip-shaped plated plate 30 is provided. And a method for producing a brazing metal pipe for holding a guide member in a tub insertion hole, which comprises a step of bending 40 to form a pipe having a shape opposite to both edges thereof.

The second feature of the present invention is that the tubular insertion hole 5 has an elliptical shape, and at least one side portion of the tube insertion hole 5 has a diameter shorter than the insertion tube 1. In the manufacturing method of the brazing metal pipe which has the guide member 7 which protrudes in parallel with this, WHEREIN: The strip | belt-shaped shaping | molding plate which consists of a brazing sheet in which the solder material layer 30b was deposited on at least one surface of the core 30a. The step of forming the at least one pair of thin press-fitting portions 31 on the strip-shaped platelet 30 by pressing the 30 at the predetermined portions of the tube insertion holes, and the press-fitting portion 31 Forming a circular arc portion 39 by bending a part of the width direction or the longitudinal direction of the strip-shaped shaped platen 30 in a circular arc shape in a state of being located on the circular arc surface, and on the circular arc portion 39. Between a pair of press-fitting portions 31 and 31 At least one of the diameters of the swelling portion in the swelling portion 42 formed by the step of axially swelling the upper portion in the swelling shape in the thickness direction and the swelling portion 42 formed by the aforementioned press-fitting portions 31 and 31 and throttling processing. Non-circular part except for the circular arc part 39 in the process of carrying out the drilling process with the side part remaining, drilling and installing the elliptical tubular insertion hole 5, and the strip-shaped plated plate 30 mentioned above ( A method of manufacturing a metal pipe for soldering holding a guide member in a tube insertion hole, comprising the steps of bending 40 and 40 to form a pipe having a shape opposite to both edges. .

In addition, the manufacturing process as described above also includes a step of forming a strip-shaped plated plate, and it is preferable to continuously carry out one long elongated brazing sheet while intermittently transferring it in the longitudinal direction.

That is, the third characteristic feature of the present invention is that the tubular insertion hole 5 has an elliptical shape, and the diameter of the tube insertion hole is at least one side edge in the shorter direction. In the manufacturing method of the brazing metal pipe which has the guide member 7 which protrudes in parallel with (circle), the brazing sheet 50 by which the solder material layer 30b was deposited on at least one surface of the core 30a is partially. By removing, the process of forming the strip-shaped platen plate 30 in which the both ends of the longitudinal direction or the width direction connected to the surplus support member 52 of the outer side via the connection member 51, and the strip-shaped platen plate 30 mentioned above Forming a circular arc portion 39 by bending a portion of the width direction or the longitudinal direction of the circular arc portion in a cross-sectional arc shape, and expanding a predetermined portion of the tube insertion hole formation portion in the arc portion 39 in the thickness direction. Throttled into shape In the swelling portion 42 formed by the step and the throttling processing, the swelling portion is drilled in a state in which at least one side portion of the swelling portion in the shorter direction remains, and the tubing insertion hole 5 is drilled and installed. Intermediate through the connecting member 51 by bending the non-circular portions 40 and 40 except for the circular arc portion 39 in the above-described strip-shaped plated plate 30 so as to have a shape opposite to both edges. Forming a pipe connected to the surplus support member 52, and separating the pipe from the surplus support member 52, from the formation process of the band-shaped platelet 30 to the pipe separation process. The metal wave for soldering holding the guide member in the tube insertion hole, characterized in that each step of the step is carried out continuously while conveying one long length of the brazing sheet 50 in the longitudinal direction intermittently. And a method for manufacturing a profile with a base.

The fourth feature of the present invention is that the tubular insertion hole 5 has an elliptical shape, and the tubing insertion hole 1 is provided at at least one side edge of the tubular insertion hole in a shorter direction. In the manufacturing method of the brazing metal pipe which has the guide member 7 which protrudes in parallel with (circle), the brazing sheet 50 by which the solder material layer 30b was deposited on at least one surface of the core 30a is partially. Forming a strip-shaped plated plate 30 in which both ends in the longitudinal or width direction are connected to the surplus support member 52 on the outside through the connecting member 51, and the brazing sheet 50 described above At least one pair of thin press-fitting portions 31 are formed by pressing the band-shaped platelets 30 at the predetermined portions at both ends of the tube insertion hole, and the press-fitting portions 31 are positioned on the arc surface. Of the strip-shaped molded platen 30 A step of forming a circular arc portion 39 by bending a portion in a direction or a longitudinal direction into a circular arc shape, and a portion between the pair of press-fit portions 31 and 31 in the arc portion 39. At least one side portion of the swelling portion in the swelling direction in the thickness direction and the diameter of the swelling portion in the swelling portion 42 formed by the press-fitting portions 31 and 31 and the throttling processing. Non-circular part 40, except for the process of carrying out the drilling process in the state which remains, and drilling and installing the tube insertion hole 5, and the circular arc part 39 in the strip | belt-shaped platen 30 mentioned above. Forming a pipe connected to the surplus support member 52 via the connecting member 51 and bending the pipe 40 from the surplus support member 52 by bending 40 to form a shape opposite to both edges. Including, forming process of the band-shaped forming platen 30 The metal pipe for soldering which holds the guide member in the tube insertion hole, characterized in that each step from the West to the pipe separation step is continuously carried out while intermittently transferring one long brazing sheet 50 in the longitudinal direction. The manufacturing method of this is made into a summary.

In addition, preferably, after the hole 32 is provided in advance in the planned portion of the press-fitting portion 31 in the strip-shaped plated plate 30, the periphery including the hole for escaping the gout is pressurized. It is preferable to form the press-fit part 31.

After bending part of the width direction or the longitudinal direction of the strip | belt-shaped shaping | molding plate | board 30 in circular arc shape, the predetermined part of the tube insertion hole formation part in the arc part 39 is expanded, and the bulging part is expanded. Since the diameter of 42 is at least one side of the shorter direction, the hole is formed by drilling, thereby forming the tube insertion hole 5, so that the elliptical tube insertion hole 5 is directly drilled in the drilling. If it is, the remaining part of the bulging part 42 is shown as the guide member 7 as it is.

Therefore, there is no need to drill the lower hole in which the guide member forming protrusions 102 remain in the side edges of the shorter diameter direction.

Of course, the drilling is not performed on the tubular pipe, but the circular arc portion 39. Therefore, the drilling is performed in a state where the support frame of the shape conforming to the circular arc portion is supported from one side of the circular arc portion 39. As a result, there is no danger of causing crushing or deformation of the pipe wall.

In addition, in the case where at least one pair of thin-walled press-fitting portions 31 are formed in the strip-shaped plated plate 30 by pressing the strip-shaped platen plate 30 at the predetermined portions at both ends of the tube insertion hole, The risk of inhibiting the insertion of the tube is reduced by creating burrs at the edges of both ends of the insertion hole.

In addition, each step from the formation process of the strip-shaped plated plate 30 to the pipe separation process is carried out continuously while intermittently transferring one long brazing sheet 20 in the longitudinal direction. Metal pipes are produced continuously and efficiently.

In addition, by providing a hole 32 for gushing out in advance at the site where the press-fitting part 31 is to be formed, the gushing tooth that is about to be deformed due to the pressing force at the time of forming the press-fitting part is pushed out into the exiting hole 32 and press-fitted. Swelling is prevented by the gushing out around the part.

The fifth characteristic feature of the present invention is that the tubing insertion hole 105 has an elliptical shape, and the insertion tubing 101 is provided at at least one side edge of the tubing insertion hole 105 in the shorter direction. In the manufacturing method of the brazing metal pipe having the guide member 107 protruding in parallel to the (), a strip-shaped platelet made of a brazing sheet having a solder material layer (130b) deposited on at least one side of the core (130a) The process of installing and drilling the lower hole 131 corresponding to the tube insertion hole and the shape corresponding to the tubular insertion hole in the state where the guide member shape protrusion 132 remains on the side edge in the shorter diameter direction and the lower hole ( A step of forming the arc portion 139 by bending a portion of the band-shaped forming plate 130 in the width direction or the longitudinal direction in a circular arc shape with the 131 positioned on the arc surface, and after the bending molding, Bur in the lower hole (131) The arcing part in the molded plate plate 130 described above is formed after the step of forming the guide member 107 by protruding the guide member forming protruding portion 132 in the thread thickness direction by performing the etching process. Metal for soldering holding the guide member in the tube insertion hole, comprising the step of bending the non-circular portions 140 and 140 except for 139 to form a pipe having a shape inclined to both edges. The manufacturing method of a pipe is a summary.

The manufacturing process as described above also includes a step of forming a strip-shaped plated plate, and is preferably carried out continuously while intermittently transferring one long brazing sheet in the longitudinal direction. That is, the sixth characteristic feature of the present invention is that the tubing insertion hole 105 has an elliptical shape, and the insertion tubing 101 is inserted into at least one side edge of the tubing insertion hole in the shorter direction. In the manufacturing method of the soldering metal pipe which has the guide member 107 which protrudes in parallel with (circle), the brazing sheet 150 by which the solder material layer 130b was deposited on at least one surface of the core 130a is partially. The brazing sheet 150 described above with the step of forming the strip-shaped plated plate 130 connected to the surplus support member 152 on the outer side in the longitudinal direction or the width direction through the connection member 151 is removed. Alternatively, the step of drilling and installing the lower hole 131 corresponding to the tube insertion hole and the corresponding shape in the strip-shaped plated plate 130 with the guide member forming protrusion 132 remaining on the side edge in the shorter diameter direction is installed. And, that After forming the arc portion 139 by bending a part of the widthwise or longitudinal direction of the strip-shaped forming platelet 130 in a circular arc shape with the lower hole 131 positioned on the arc surface, and after the bending molding. By performing the burring process on the lower hole 131, the guide member forming protrusions 132 are projected in the thickness direction to form the guide member 107, and after the guide member is formed, the formed platelets ( The non-arc portions 140 and 140 except for the arc portion 139 in 130 are bent to form a shape opposite to both edges, so that the surplus support member 152 is interposed therebetween. Forming a connected pipe, and separating the pipe from the excess support member 152. The length of each of the processes from the formation of the band-shaped platelet plate 130 to the separation of the pipes is one length. Long bra While the gong sheet 150 intermittently in the longitudinal conveying direction, to a method of manufacturing a metal pipe for soldering to hold the guide member in the probe tube insertion hole, characterized in that for performing successively with a base.

Preferably, before bending the strip-shaped plated plate 130 to the circular arc portion 139, the inner edges of the lower hole 131 are deformed in a pipe-forming state by pressing and deforming the inner edge portions at both ends in the longitudinal direction. On the tapered portion 133 positioned parallel to the tube insertion direction, the outer edges of both ends in the longitudinal direction of the lower hole are pipe-formed to the outside of the tube thickness in the pipe forming direction. It is preferable to form it as the vertical shear part 134 which inclines in the shape which spreads toward the side.

After the lower hole 131 of the tubular insertion hole corresponding shape is drilled and installed in the strip-shaped plated plate 130 with the guide member forming protrusion 132 remaining on the side edge in the shorter diameter direction, Part of the widthwise or longitudinal direction of the strip-shaped platelet plate 130 is bent into a cross-sectional arc shape in a state where the hole 131 is located on the arc surface, so that the bottom hole 131 is drilled and installed after bending molding. Complex perforations are unnecessary.

In addition, since the perforation of the lower hole 131 is performed at the stage of the strip-shaped platelet 130 before the bending molding, there is no risk of crushing or deformation of the pipe.

In the case where the steps from the forming step of the strip-shaped plated plate 130 to the pipe separating step are carried out continuously while intermittently transferring a long length of the bracing sheet 150 in the longitudinal direction, the guide member is attached. Metal pipes for soldering are produced continuously and efficiently.

In addition, before the bending of the molded plate plate 130, the tapered portion 133 for positioning the inner edge portions of both ends of the lower hole 131 in the longitudinal direction in a pipe forming state in parallel with the tube insertion direction. On the other hand, the lower end 131 is formed with a vertical shear portion 134 which inclines the outer edges of both ends in the longitudinal direction in a pipe-forming state to a shape that extends outward to the middle of the thickness of the tubing insertion direction. As a result, when both ends of the tub 101 are inserted into the tubing insertion holes 105 of the header pipes 103 and 104, the vertical shear portion 134 of the tubular in the width direction ends thereof is changed. The tub 101 is inserted smoothly while being guided to the guide surface 134 'at both ends of the insertion hole, and the taper portion 133 is restricted to the parallel portions 133' at both ends of the insertion hole.

In contrast to the drawings that show the embodiments, the following detailed description will further clarify the objects and advantages of the present invention.

[Examples of the Invention]

[First Embodiment]

Next, an embodiment of this invention is signed.

This embodiment shows a method of manufacturing a header pipe used as a heat exchanger made of aluminum (including its alloy) as a capacitor for a car cooler shown in FIGS. 1 to 5.

1 to 5, (1) is a plurality of tubs arranged in the vertical direction in the horizontal state, (2) corrugated fin interposed between the adjacent tube (1) (1) ), (3) and (4) are left and right aluminum header pipes of circular cross section, and these header pipes use a soldering pipe manufactured according to the present invention.

The header pipes 3 and 4 described above are manufactured as follows.

That is, as shown in FIG. 10 and FIG. 11, the strip | belt-shaped molded plate | board 30 which coat | covered and formed the solder material layer 30b on both surfaces of the core 30a which consists of aluminum is prepared.

Generally, as the solder material layer 30b, an Al-Si alloy having a Si content of about 6 to 13 wt% is used.

Preferably, as shown in Figs. 13 and 14, a pair of thin D-shaped press-fitting portions are formed by pressing the predetermined portions at both ends of the tube insertion hole in the molded platelet 30 by embossing. 31).

This press-in part 31 is formed.

As described later, the press-fitting portion 31 serves to prevent burrs from being generated at the edges of both ends of the insertion hole when the tubing insertion hole 5 is installed.

In this embodiment, the tubing insertion hole 5 is a direction in which the longitudinal direction thereof coincides with the width direction of the strip-shaped molded plate 30, and is provided at equal intervals in the longitudinal direction. The press-fitting portions 31 and 31 are formed at symmetrical positions with the center line in the longitudinal direction of the molded plate 30 interposed therebetween, and a plurality of pairs thereof are installed in a state in which the plurality of pairs are arranged in the longitudinal direction of the molded plate 30. .

In addition, the formation of the indentation portion described above does not necessarily have to be performed.

In the formation of the press-fitting portion 31, since the extermination of the platelet 30, which is subjected to the pressing force, which is deformed to the periphery, is drawn out around the press-fitting portion, and the outer periphery of the press-fitting portion is expanded, the tub insertion hole 5 There is a risk that the shape of the tip edge of the cuff will change, causing a burr.

Thus, in order to absorb the gushing out of the press-fitting part 31, a small hole 32 through which the gushing-out gushing out is formed in advance in a predetermined portion of the press-fitting part, preferably, as shown in FIG. In addition, it is recommended to form the press-fit portion 31 by pressing the peripheral portion including the hole 32 through which the gout is removed.

By the way, it is preferable to make the outer end edge 31a (refer FIG. 14) of the indentation part 31 formed by the above bar in the inclined surface which spreads outward slightly in the vertical plane parallel to the flesh thickness direction.

The reason for this is that after forming the pipe, the end edge 31a is inclined in the shape of spreading outward to the middle of the flesh thickness with respect to the insertion direction of the tube 1, as shown in Figs. This is to ensure that the guide face 34 contributes to the smoothness and ease of insertion when the tube is inserted.

Next, as shown in FIG. 15, after forming the recessed part 37 for connecting a refrigerant | coolant inlet_pipe at the same position of the edge part of the width direction of the shaping | molding platen 30 in the width direction, it continues to form shaping | molding plate like that. A plurality of incisions in the same position in the width direction both side edge portion of the 30 (38) is formed.

The incisions 38 correspond to each other after joining the edge portions on both sides thereof, so as to provide a partition plate 6 for the refrigerant circulation in the heat exchanger shown in FIGS. 1 to 5. The partition plate insertion hole 11 is formed.

Next, both edge portions in the width direction of the strip-shaped plated plate 30 described above are pressed by pressing or the like in the thickness direction to form a surface.

This pressurization is applied gradually from the lower edge portion to the upper edge portion on one side edge portion, as shown in FIG. 16, by pressing the lower surface portion on one side edge portion and the upper surface portion on the other side edge portion. The surface is formed by the inclined surface 35a which becomes thin, and the surface is formed by the inclined surface 35b which gradually becomes thinner toward the lower edge from the upper edge to the other side edge portion.

In addition, the solder material layer 30b exists on any of the inclined surfaces 35a and 35b.

By forming the both side edge portions in the width direction of the strip-shaped molded plate 30 in this manner, as shown in FIG. 7, as shown in FIG. Can be joined in an overlapping state, and the solder material layer can be interposed on the bonded surface, and then the butt portion 36 can be sufficiently joined by soldering.

In addition, the process of forming this surface may be performed before formation of the refrigerant | coolant inlet_pipe connection recess 37 and the cutting 38 mentioned above.

Next, as shown in FIG. 17, the intermediate portion in the width direction of the formed platen 30 including the press-fitting portions 31 and 31 described above is bent into a cross-sectional arc shape by pressing or the like along the longitudinal direction of the circular arc. The part 39 is formed and the whole is hat-shaped in cross section.

The bending molding to the arc part 39 is performed in the direction which makes the press-in part 31 located outside.

Next, as shown in FIG. 18 to FIG. 20, in the circular arc portion 39, a portion between each pair of the press-fit portions 31 and 31 is circularly arced by bead processing. It expands toward the inside of the part 39.

The expansion is performed such that the length of the generated bulge 42 in the shorter direction is slightly larger than the length of the tubular insertion hole 5 in the shorter direction.

Next, as shown in Figs. 21 to 23, the bulging part 42 and the press-fitting part 31 are drilled, and the elliptical tubular insertion hole 5 is provided.

Since the length of the bulging part 42 is shorter than the length of the tube insertion hole 5 in the shorter direction, the bulging part 42 has the length of the bulging part 42 by the above-mentioned drilling process. Both sides of the shorter diameter direction remain, and the remaining portion is used as the guide member 7 of the tube insertion hole.

In addition, when the press-fitting part 31 is provided, since the thickness of the press-fitting part 31 is thin, the press-fitting part 31 is smoothly cut by the punching process so that burrs are not generated at the end edge of the press-fitting part 31. Do not.

Next, the non-circular portions 40 and 40, which are horizontal shapes on both sides of the arc portion 39, are press-fitted in a direction to close each other, and the entire shape is bent to have an inverted V shape in cross section (Fig. 24). After pressing the circular arc portions 40 and 40 again in the approaching direction to bend the entire cross section into an inverted U shape (FIG. 25), the non-arc circular portion 40 is continuously connected to the circular arc portion 39. Bending is carried out in a circular cross section to form a header pipe having a shape in which both edge portions are opposed to each other (Fig. 26).

After that, preferably, the pipe cross-sectional shape including the protruding shape of the guide member 7 is corrected to obtain header pipes 3 and 4 having the desired dimensions.

By the way, in the manufacture of the header pipe as described above, the plurality of strip-shaped platelets 30 may be manufactured first, and the above-described steps may be performed on the strip-shaped platelets 30, but the strip-shaped platelets ( It is particularly preferable to carry out all the processes including the manufacturing process of 30) continuously while conveying one long brazing sheet 50 intermittently in the longitudinal direction.

That is, as shown in FIG. 27, after forming the hole 32 which gushes out at the predetermined position of the front end part of the long brazing sheet 50 in the longitudinal direction, the brazing sheet 50 is moved to the predetermined amount forward direction. Transfer it to stop.

Next, as shown in FIG. 28, by stripping unnecessary portions of the brazing sheet around the perforated portion where the gushing out is formed, the band-shaped molded plate 30 long in the width direction of the brazing sheet 50 is formed. It is produced by connecting to the surplus support member 52 on the outside via the connecting member 51 at both ends of the longitudinal direction.

At the same time, the next new gush-out hole 32 is drilled in the rear of the strip-shaped plated plate 30.

Moreover, what is necessary is just to set the length and width of a strip | belt-shaped shaping | molding plate suitably according to the dimension, such as the header pipe of a heat exchanger to be scavenged.

Reference numeral 53 is a clearance hole provided in the surplus support member 52 at the lateral position of the connecting member 51.

Next, the brazing sheet 50 is again transported and stopped, and as shown in FIG. 29, the press-fitting portion 31 is formed at the position of the hole where the leading strip of the leading strip-shaped platen 30 escapes, A new band-shaped platelet 30 is formed at the rear of the band-shaped platelet 30, and the third new toothed-out hole 32 is drilled again.

In the same procedure as described below, the brazing sheet 50 is intermittently transferred, and each step of the molding plate 30 and the new molding plate 30 are continuously performed.

In addition, the forming process of the strip-shaped plated platen 30 may be performed in the reverse order, or the hole 32 may be drilled out after forming the plated plate 30 first. You may install it.

In addition, the hole 32 through which the gushing out is drilled first may be installed, and then the press-in portion 31 may be formed, followed by the forming platelet.

In the continuous manufacturing method in which the brazing sheet 50 as described above is carried out in this way, the execution of each process for the strip-shaped plated plate 30 is connected to the surplus support member 52 via the connecting member 51. Since the pipe molding is completed, the pipe molded body 41 can be obtained while being connected to the surplus support member 52 as shown in FIG. 30 when the molding process to the pipe is completed.

Thus, in the final step, the pipe molded body 41 is cut and separated from the connecting member 51 to obtain a scavenged header pipe.

The header pipe thus produced is washed as necessary and then transferred to the product assembly process.

Since the header pipe is to be soldered afterwards, the butt portion is naturally joined in the soldering process, so that the butt portion 36 does not need to be closed by welding like an electric sealing tube.

Preparation of the heat exchanger mentioned above is performed as follows.

In other words, both ends of the tube 1 are inserted into the tube insertion holes 5 of the header pipes 3 and 4.

When the tubing 1 is inserted, both ends of the tubular in the width direction are guided to the guide face 34 at both ends of the tubing insertion hole 5 so that the tubing can be inserted smoothly. Guided by the guide member (7), the tub (1) is inserted straight.

In addition, since the guide member 7 is firmly guided even after being inserted, the tube 1 rarely shakes in the height direction, and the header pipes 3 and 4 and the tube 1 form a right angle shape and are temporarily fixed. Connected.

After inserting the tub, the corrugated pin 2, which is also made of brazing sheets, is placed between the adjacent tubs 1 and 1 and outside the outermost tubing, and the partition plate insertion hole of the pipe ( 11) Insert the partition plate 6 into the upper and lower side plates 12 and 12 on the outer side of the outermost corrugated pin, and then assemble them, and then, these components are made by furnace brazing. Solder all at once.

After soldering, as shown in FIG. 3, sufficient fillet is formed at the connection portion between the header pipes 3 and 4 and the tubing 1 so that the header pipe and the tubing are firmly joined together and integrated. It becomes one.

In addition, the guide surface 34 spreading outward at both ends of the insertion hole is a place where lead is accumulated, and lead is introduced at the same time, and the joining portion of the guide member 7 and the tubing 1 is widely joined, so that a more firm connection is achieved. do.

In addition, a fillet is formed in each butt portion 36 of the header pipes 3 and 4, and the butt portion 36 is joined in a sealed state.

In addition, since the header pipes 3 and 4 are pressed and deformed at both edges of the molded platen 30 in the manufacturing step, they are continuously pressed and crushed in the state of thin flesh, so that the butt portion 36 is formed after pipe forming. ) Are matched in an overlapping state, and the solder material layer 30b exists between the surfaces to be joined to each other, so that the joining of the butt portions 36 can be more surely and sufficiently ensured.

In addition, 8 and 8 shown in FIG. 2 are upper and lower cover members in each header pipe 3 and 4, and these cover members are cap-shaped as shown in FIG. It is molded to cover the end of the header pipe before soldering after forming the header pipes (3) and (4), thereby acting as a blockage of the pipe, and preventing the butt of the header pipe from being opened due to heat changes during soldering heating. It even doubles.

9, the refrigerant inlet tube 10 is a cold outlet tube, and these outlet tubes are also soldered consistently like other parts.

In addition, in the above embodiment, in the case of producing the header pipes 3 and 4 in which the longer direction of the tube insertion hole 5 is matched in the width direction of the strip-shaped plated plate 30, Although the explanation has been given, the insertion hole in a state where the longer diameter direction coincides in the longitudinal direction of the molded platen 30 may be provided.

According to the invention described in Claim 1, after bending a part of the width direction or the longitudinal direction of the strip-shaped plated plate into a circular arc shape in cross section, the tube tubing hole formation scheduled portion of the arc portion is expanded in the thickness direction, and the expansion thereof is expanded. Since at least one side part of the short diameter part is left in the state where the side is left, the hole is formed to form a tubing insertion hole. Therefore, when the oval tubular insertion hole is directly drilled in the drilling, the remaining portion of the bulge portion remains intact. It is a guide member.

Therefore, the shorter diameter direction eliminates the need to drill the lower hole by leaving the guide member forming protrusions at the side edges, and the complicated perforated frame that is matched to the lower hole shape as viewed from the bottom to form the lower hole is unnecessary. As a result, the machining of perforated molds can be complicated and the risk of blade damage or wear can be reduced.

Of course, the perforation is not performed on the cylindrical pipe, but rather on the arc part, so that the perforation can be performed from the one side of the arc part to the support frame, which is a shape conforming to the arc part. Pressing can reduce the risk of crushing or deformation.

In addition, according to the invention described in claim 2, since the thin-walled press-fitting portion is formed in advance at the predetermined portions of the tubing-insertion holes in the molded platelet, burrs are formed at both end edges of the tubing-insertion holes. The risk of inhibiting tubing insertion can be reduced by releasing.

In addition, according to the invention described in Claims 3 and 4, since each step from the forming step of the strip-shaped platelet to the pipe separating step is continuously carried out while intermittently transferring one long brazing sheet in the longitudinal direction, It is possible to continuously and efficiently produce the brazing metal pipe with the guide member and to be manufactured by full automation.

In addition, according to the invention described in claim 5, by providing a hole to be pushed out in advance in a predetermined part of the press-fitted portion, it is possible to let the gush-out to be deformed to the surroundings when the press-fitted part is formed by pressing into the exiting hole. In this way, the dents can escape from the periphery of the press-fitting portion, thereby preventing swelling, and furthermore, the thickness thickness at the end edge of the tube insertion hole and the occurrence of burr can be more effectively prevented.

Second Embodiment

Next, a second embodiment of this invention will be described.

This embodiment shows a method for producing a header pipe for use in a heat exchanger made of aluminum (including its alloy) as a condenser for a car cooler shown in FIGS. 32 to 36.

32 to 36, (101) is a plurality of tubs arranged in the vertical direction in a horizontal state, and (102) are adjacent tubs (101). Corrugated fins (103) and (104) interposed between (101) are the left and right aluminum header pipes of circular cross section, and as these header pipes, a soldering pipe manufactured according to the present invention is used. .

The header pipes 103 and 104 described above are manufactured as follows.

That is, first, as shown in FIGS. 41 and 42, a strip-shaped plated plate 130 having a solder material layer 130b coated and formed on both surfaces of an aluminum core 130a is prepared.

As the solder material layer 130b, an Al-Si alloy having a Si content of about 6 to 13 wt% is generally used.

Next, as shown in FIG. 43, the lower hole 131 in the direction in which the longer diameter direction coincides in the width direction of the molded platen in the widthwise middle portion of the molded platen 130 is formed. They are laid at equal intervals in the longitudinal direction.

The lower hole 131 is an elliptical tubular insertion hole 105 in the future, and the guide portion forming protrusions 132 are formed at both side edges of the tube insertion hole 105 in the shorter direction. ) And the snow is left.

As the above-described lower hole punched holes are carried out on the strip-shaped plated plate 130 before bending, it is possible to use a planar two-dimensional shape that conforms to the lower hole shape when viewed in a plane and is viewed from the side as a punched die. Therefore, there is no need to use a three-dimensional shape from the side.

The above-described lower hole 131 is drilled so as to pass straight through the flesh thickness of the strip-shaped plated plate 130.

After drilling, preferably, the diameter of the lower hole 131 is formed by pressing and deforming the edge portion of one end in the flesh thickness direction at both ends in the long direction, and as shown in FIG. 44, the middle of the flesh thickness. A tapered portion 133 is formed to be inclined in a tapered shape from the position.

The tapered portion 133 is positioned in parallel with the tube insertion direction in the pipe forming state as shown in FIG. 37 and FIG. 38, so that both ends of the tube 101 in the width direction of the tube 101 are inserted at the time of tube insertion. It is installed to allow sufficient solder joints by fitting the surface into the surface contact state and further preventing the occurrence of gaps between the insertion tube.

Accordingly, the inclined angle of the tapered portion 133 is determined in advance so that the tubular insert is parallel to the direction after pipe forming.

On the other hand, the other end edge portion in the flesh thickness direction at both ends of the lower hole 131 in the longer diameter direction remains as the vertical shear portion 134 straight cut in the flesh thickness direction as shown in FIG.

After forming the pipe, the vertical shearing portion 134 is inclined in the outwardly expanding shape to the middle of the thickness of the tubing 101 as shown in FIG. 38, and thus the guide surface at the time of the tubing insertion. It plays a role in contributing to the smoothness and ease of insertion.

Next, both edge portions in the width direction of the strip-shaped plated plate 130 described above are pressed by pressing or the like in the thickness direction to form a surface.

This pressing is applied to the lower surface of one side edge portion and the upper surface of the other side edge portion, so that the inclined surface gradually becomes thinner from the lower edge toward the upper edge as shown in FIG. The surface is formed on 135a), and on the other side edge portion, the surface is formed on the inclined surface 135b that becomes gradually thinner from the upper edge toward the lower edge.

In addition, the solder material layer 130b exists on any of the inclined surfaces 135a and 135b.

By forming both edges of the strip-shaped plated plate 130 in this manner, as shown in FIG. 38, when the edges of both sides are formed to be opposite to each other, they are overlapped in the shape overlapped with the butts 136, and a solder layer is formed on the contact surface. It can interpose, and afterwards, sufficient joining of the butt | matching part 136 can be ensured by soldering.

Subsequently, as shown in FIG. 46, after the refrigerant inlet pipe connecting hole 137 is laid in the predetermined portion, a plurality of incisions are made at the same position on both side edges in the width direction of the strip-shaped plated plate 130. 138).

This incision 138 is a partition tube insertion hole for installing the partition plate 106 for the refrigerant meandering flow in the heat exchanger shown in FIG. To form (111).

Next, as shown in FIG. 47, the intermediate portion in the width direction of the molded platelet 130 including the formation range of the lower hole 131 is bent into a cross-sectional arc shape by a press or the like along the longitudinal direction, thereby forming the circular arc portion 139. The whole is made into a cross-section hat shape.

Further, as shown in FIG. 48, the horizontal non-circular arc portions 140 and 140 on both sides of the arc portion are pressed in the closing direction to bend and shape the whole in a substantially V-shaped cross section.

The arc portion 139 is formed in the bending direction such that the tapered portions 133 of both ends of the lower hole 131 are positioned inward, and the vertical shear portions 134 are positioned outward. Set up and run.

By this bending molding, the tapered portions 133 at both ends of the lower hole 131 in the longitudinal direction are parallel to the tube insertion direction, and the vertical shear portion 134 has an outer-expanded guide surface 134 '. (See FIG. 38).

Next, as shown in FIG. 49A and B, the guide member 107 is formed by carrying out a burring process to the lower hole 131. As shown in FIG.

The bearing may be carried out by inserting a punch from the outside with respect to the lower hole 131, as in the known method.

By this burring process, the tube insertion hole 105 which holds the guide member 107 which protrudes inwardly in the tube insertion direction is formed in the both side edges of this short direction now.

Subsequently, the non-arc portions 140 and 140 are pressed again in the approach direction to bend the entire shape into a substantially U-shaped cross section (FIG. 50), and then the non-arc portion 140 is subsequently moved to the arc portion 139. ) Is formed into a circular cross section continuous to the cross section, and formed into a header pipe having a shape opposite to both side edges (FIG. 51).

After that, the pipe cross section including the shape of the guide member 107 is preferably modified to obtain header pipes 103 and 104 having the desired dimensions.

By the way, in the manufacture of the header pipe as described above, a plurality of strip-shaped platelets 130 may be produced first, and each of the strip-shaped platelets 130 may be subjected to the above-described steps. It is particularly preferable from the point of production efficiency that all the processes including the manufacturing process of 130 are carried out continuously while one sheet conveys the long brazing sheet 150 intermittently in the longitudinal direction.

That is, as shown in FIG. 52, the strip-shaped molded plate 130, which is long in the width direction of the brazing sheet, is punched by punching unnecessary portions of the longitudinal distal end portion of the long brazing sheet 150 in both longitudinal directions thereof. The part is manufactured by being connected to the surplus support member 152 on the outside by the connecting member 151.

Reference numeral 153 denotes a clearance hole provided in the excess support member 152 at the side position of the connecting member 151.

Next, the brazing sheet 150 is transferred to a predetermined amount in the forward direction, and then stopped, and the lower hole 131 for the tubing insertion hole is laid in the band-shaped platelet 13 formed as shown in FIG. At the same time, the next satin-shaped plated plate 130 is formed behind the leading strip-shaped platen plate 130.

Then, the brazing sheet 150 is again transferred to a predetermined amount, and then stopped. The tapered portion 133 is formed in the lower hole 131 for the leading strip-shaped plated plate 130, and the second strip-shaped. For the molded platen 130, a lower hole 131 is laid, and a third new strip-shaped plated plate 130 is formed behind the second band-shaped platen 130, and the brazing sheet ( While performing the intermittent transfer of 120, the processes for the molded platelets 130 and the formation of the new molded platelets 130 are continuously performed.

In addition, in the formation process of the strip-shaped plated plate 130 and the drilling process of the lower hole, the order of implementation may be changed, and first, the lower hole 131 is laid in the brazing sheet 150, or the lower hole 131 The tapered portions 133 may be formed after the tapered portions 133 are formed at both edge portions to remove unnecessary portions.

Thus, in this case, the implementation of each process for the strip-shaped plated plate 130 is carried out while being connected to the surplus support member 152 by the connecting member 151. As shown in the drawing, the pipe molded body 141 is obtained while being connected to the surplus support member 152.

Thus, in the final step, the pipe molded body 141 is cut off from the connecting member 151 to obtain a header pipe for scavenging.

The header pipe thus produced is cleaned as necessary and then transferred to the product assembly process.

Since this header pipe is to be soldered afterwards, the butt portion is inevitably joined in the soldering process, and thus it is not necessary to close the butt portion 136 by welding like an electric field tube.

The heat exchanger shown in FIG. 32 to FIG. 35 is manufactured as follows.

That is, both ends of the tube 101 are inserted into the tube insertion holes 105 of the header pipes 103 and 104.

In the insertion of the tub 101, as shown in FIGS. 37 and 38, both widthwise ends of the tub are guided to the guide surfaces 134 'at both ends of the tubing insertion hole 105, and then inserted again. The tube 101 is inserted straight by being guided by the guide member 107 of the insertion hole while being inserted smoothly by being restricted to the parallel portions 133 'at both ends of the hole.

In addition, after insertion, the guide member 107 is firmly guided so that there is almost no fluctuation in the height direction of the tub 101, and the header pipes 103, 104 and the tub 101 are formed at right angles to be connected temporarily. do.

After the tube is inserted, a corrugated pin 102, which is also a brazing sheet, is placed between the adjacent tubes 101, 101 and the outermost tube, and the diaphragm plate insertion hole 111 of the pipe is inserted. Insert the diaphragm plate 106 into the upper and lower side plates 112 and 112 on the outer side of the outermost corrugated pin, and then assemble these components. Solder all at once.

After the soldering, sufficient fillet is formed at the connection portion between the header pipes 103 and 104 and the tub 101, and the header pipe and the tub are firmly joined together tightly.

In particular, the outer extension surface 134 ′ at both ends of the insertion hole is where the solder lumps, so that the solder flows in and the contact portion between the guide member 107 and the tub 101 is soldered widely to ensure a firmer bond. .

Fillets are also formed in the butt portions 136 of the header pipes 103 and 104, and the butt portions 136 are joined in a sealed state.

In addition, since the header pipes 103 and 104 are squeezed in a thin thickness state by pressing and deforming both side edge portions of the strip-shaped plated plate 130 in the widthwise direction at the manufacturing stage thereof, the pipes 103 and 104 are formed in FIG. As shown in the figure, the butts 136 are overlapped with each other, and the solder material layer 130b is present between the contact surfaces, so that the bonding of the butts 136 can be more reliably and sufficiently guaranteed.

(108) and (108) shown in FIG. 33A are upper and lower cover members of each of the header pipes (103) and (104), and these cover members are formed in a cap shape as shown in FIG. After forming the pipes 103 and 104, they are applied to the ends of the header pipes before soldering, and serve to block the pipes and to prevent the abutment of the header pipes due to thermal deformation during soldering heating.

Reference numeral 109 shown in FIG. 33A denotes a refrigerant inlet tube, and 110 is a refrigerant outlet tube, and these entrance and exit tubes are also soldered together as in the other components.

In the above embodiment, the case where the tubular insertion hole 105 whose long diameter is matched in the width direction of the band-shaped molded plate plate 130 is provided has been described, but the long direction of the diameter is the molded plate plate 30. The insertion holes may be provided in a state coinciding in the longitudinal direction.

According to the invention as set forth in claim 7, a metal pipe for soldering is produced which has an elliptical tube insertion hole and has a guide member protruding in parallel with the insertion tube on at least one side edge of the tube insertion hole. The bottom hole of the strip-shaped platelet is formed on the side edge in the shorter diameter direction, and the lower hole is located on the circular arc surface. Because part of the part is bent into a circular arc shape, it is possible to avoid the need for complicated punching mold such as when laying the lower hole after bending molding, and to complicate the machining of the punching mold and risk of damage or abrasion of the blade part. Not only can reduce the pressure, but also because the bottom hole is drilled before bending. It can reduce the risk.

In addition, since the burring process for forming the guide member is performed in the arc portion after bending molding, it is not possible as a rib for preventing the bending of the guide member as in the case of bending the arc portion after the formation of the guide member. Since the smooth bending process can be performed, the risk of deformation of the pipe can be further reduced.

In addition, according to the invention described in claim 8, since each step from the band forming platelet forming step to the pipe separating step is carried out continuously, a brazing metal pipe provided with a guide member can be produced continuously and efficiently. At the same time, it becomes possible to manufacture by fully automatic.

According to the invention of claim 9, the longer side of the lower hole forms a tapered portion in which both inner edge portions of the lower hole are formed in a pipe-forming state in parallel with the tubing insertion direction. The outer edges of both ends of the longer diameter pipe are formed in a vertically sheared portion that is stiffened outwardly in the shape of a pipe in the pipe-forming state until the thickness of the tube is inserted. In inserting the two ends of the groove, the widthwise ends of the tube are guided to the guide faces of both ends of the changed tube insertion holes of the vertical shear portion, which are posted, and are regulated in parallel to both ends of the changed insertion holes of the tapered portion. Therefore, the tubing can be inserted into the insertion hole smoothly, and the soldering wave excellent in the ease of assembly to the heat exchanger, etc. It can be a program.

Claims (12)

A guide member having an elliptical tubular insertion hole 5 and protruding in parallel with the insertion tube 1 on at least one side edge of the tube insertion hole 5 in the shorter direction ( 7) A method of manufacturing a brazing metal pipe having a width in a width direction or a length direction of a strip-shaped plated plate 30 made of a brazing sheet having a solder material layer 30b deposited on at least one surface of a core 30a. A step of forming a circular arc portion 39 by bending a part in an arc shape in a cross section, and a step of throttling the tubular insertion hole formation scheduled portion in the arc portion 39 in a bulging direction in the thickness direction; Drilling is performed on the bulging portion 42 formed by the above-described axial machining in a state in which at least one side portion of the bulging diameter remains in the shortest direction, and then drills and installs the oval tubular insertion hole 5. And bending the non-circular portions 40 and 40 except for the arc portion 39 in the band-shaped platelet 30 described above to form a pipe having a shape opposite to both edges thereof. A method of manufacturing a metal pipe for soldering, comprising a guide member in a tubing insertion hole. A guide member having an elliptical tubular insertion hole 5 and protruding in parallel with the insertion tube 1 on at least one side edge of the tube insertion hole 5 in the shorter direction ( 7) A method of manufacturing a metal pipe for soldering, in which a strip-shaped plated plate 30 made of a brazing sheet having a solder material layer 30b deposited on at least one surface of a core 30a is provided with a tube insertion hole. By pressurizing at a predetermined portion at the end, a step of forming at least a pair of thin press-fit portions 31 on the strip-forming molded platen 30, and a band-shaped mold in a state where the press-insert portions 31 are positioned on an arcuate surface. Forming a circular arc portion 39 by bending a portion of the platelet 30 in the width direction or the longitudinal direction in a circular arc shape, the pair of press-fit portions 31 in the arc portion 39, (31) in the bulge shape in the flesh thickness direction Drilling is performed in a state in which the swelling portion has at least one side portion with a short diameter in the swelling portion 42 formed by the axial machining step and the swelling portion 42 formed by the indentation portions 31 and 31 described above. And the non-circular portions 40 and 40 except for the circular arc portion 39 in the above-described strip-shaped platelet 30 are formed by bending the elliptical tubular insertion hole 5. A method of manufacturing a metal pipe for soldering, comprising a guide member in a tube insertion hole, comprising the step of forming a pipe having a shape opposite to both edges. Guide member 7 having an elliptical tubular insertion hole 5 and protruding in parallel with the insertion tube 1 on at least one side edge of the tube insertion hole 5 in the shorter direction. In the manufacturing method of the soldering metal pipe which has (), it lengths through the connection member 51 by partially removing the brazing sheet 50 by which the solder material layer 30b was deposited on at least one surface of the core 30a. Forming a strip-shaped platen plate 30 in which both ends of the strip-shaped platen plate 30 are connected to the surplus support member 52 on the outer side, and a portion of the strip-shaped platen plate 30 in the width direction or the longitudinal direction thereof is a circular arc. Forming a circular arc portion 39 by bending it into a shape; and axially drilling a predetermined portion of the tube insertion hole formation portion in the arc portion 39 in an expanded shape in the thickness direction; In the bulge 42 formed by In the step of drilling the tube insertion hole 5 and installing it by drilling in a state in which at least one side part of the diameter of the bulging portion remains in the short direction, and in the band-shaped molded plate 30 described above, The process of forming into a pipe connected to the surplus support member 52 via the connecting member 51 by bending the non-circular portions 40 and 40 except for the circular arc portion 39 to form a shape opposite to both edges. And a step of separating the pipe from the surplus support member 52, wherein each step from the forming step of the strip-shaped plated plate 30 to the pipe separating step is one long brazing sheet 50. A method of manufacturing a soldering metal pipe for holding a guide member in a tubing insertion hole, characterized in that it is carried out continuously while feeding intermittently in the longitudinal direction. The guide member 7 which has an elliptical tubular insertion hole 5 and protrudes in parallel with the insertion tube 1 at the side edge of at least one side of the said tubular insertion hole in the short direction is provided. In the manufacturing method of the brazing metal pipe to be retained, the brazing sheet 50 having the solder material layer 30b deposited on at least one surface of the core 30a is partially removed so as to be longitudinally interposed through the connecting member 51. Or a step of forming a band-shaped platen plate 30 in which both ends in the width direction are connected to the surplus support member 52 on the outer side, and the brazing sheet 50 or the band-shaped plate plate 30 in the tubing insertion hole. The step of forming at least a pair of thin press-fit portions 31 by pressing at predetermined portions at the end portions of the die, and the width of the strip-shaped molded platen 30 in a state where the press-fit portions 31 are located on the arcuate surface. Circle in a direction or part of the longitudinal direction The step of forming the arc portion 39 by bending in a shape and the portion between the pair of press-fit portions 31 and 31 in the arc portion 39 in the bulging direction in the thickness direction. The punching process is performed in the state to which the indentation part 31 and 31 and the bulging part 42 formed by the throttling process remain | survive at least one side part of the diameter direction of the bulging part remaining short. The step of drilling the tubing insertion hole 5 and the non-circular portions 40 and 40 except for the arc portion 39 in the strip-shaped plated plate 30 are bent to face both edges. The belt-shaped forming platelet includes a step of forming a pipe connected to the surplus support member 52 through the connecting member 51 by forming a shape, and a step of separating the pipe from the surplus support member 52. Angles from the forming step (30) to the separating step of the pipe A process for producing a brazing metal pipe for holding a guide member in a tube insertion hole, characterized in that the step is carried out continuously while intermittently transferring one long brazing sheet (50) in the longitudinal direction. The method according to claim 2, wherein after the installation of the hole 32 for gushing out in the predetermined portion of the press-fitting portion 31 in the strip-shaped plated plate 30, the periphery including the hole for gushing out is pressed. And a press-fitting part (31) for producing a metal pipe for soldering, wherein the guide member is held in the tubing insertion hole. The vertical plane parallel to the thickness direction of the outer end edge 31a of the press-fitting portion 31 is slightly outwardly before bending of the strip-shaped platen 30 to the arc portion 36. A method for manufacturing a soldering metal pipe having a guide member in a tubing insertion hole, characterized in that it is formed with an inclined surface. A guide member having an elliptical tubular insertion hole 105 and protruding in parallel with the insertion tube 101 on at least one side edge of the tube insertion hole 105 in a shorter direction ( 107). A method of manufacturing a metal pipe for soldering, comprising a tube inserting hole corresponding to a strip-shaped plated plate 130 formed of a brazing sheet having a solder material layer 130b deposited on at least one surface of a core 130a. A step of drilling a lower hole 131 having a shape in a state where the guide member forming protrusion 132 remains at a side edge in a shorter diameter direction, and a state where the lower hole 131 is located on an arcuate surface; Forming a circular arc portion 139 by bending a part of the widthwise or longitudinal direction of the furnace strip-shaped plated plate 130 into a circular arc shape, and after the bending, a burring process on the lower hole 131. Guide by carrying out The non-circular part except the circular arc part 139 in the shaping | molding plate plate 130 mentioned above after forming the guide member 107 by protruding the member formation protrusion part 132 in the thread thickness direction, and forming guide member. A method of manufacturing a metal pipe for soldering, comprising a guide member in a tube insertion hole, comprising the steps of bending the parts 140 and 140 to form a pipe having a shape opposite to both edges. A guide member 107 having an elliptical tubular insertion hole 105 and protruding in parallel with the insertion tube 101 on at least one side edge of the tube insertion hole whose diameter is short; In the manufacturing method of the brazing metal pipe to be retained, the longitudinal direction is interposed through the connecting member 151 by partially removing the brazing sheet 150 having the solder material layer 130b deposited on at least one surface of the core 130a. Or a step of forming a strip-shaped plated plate 130 connected to the surplus support member 152 on both sides in the width direction, and a tube insertion hole in the brazing sheet 150 or the strip-shaped plate plate 130. And a step of drilling the lower hole 131 corresponding to the shape of the hole with the guide member forming protrusion 132 remaining on the side edge in the shorter diameter direction, and the lower hole 131 located on the arcuate surface. In state to do The process of forming the arc part 139 by bending part of the width direction or the longitudinal direction of the die plate 130 to circular arc shape, and carrying out a burring process to the lower hole 131 after the bending shaping | molding. The non-circular part except the circular arc part 139 in the shaping | molding plate plate 130 mentioned above after forming the guide member 107 by protruding the member formation protrusion part 132 in a flesh-thickness direction, and forming guide member. And forming a pipe connected to the surplus support member 152 via the connection member 151 by bending the 140 and 140 to form a shape opposite to both edges, and forming the pipe as a surplus support member 152. And a step of transferring the long brazing sheet 150 intermittently in the longitudinal direction from the forming step of the strip-shaped platelet 130 to the separating step of the pipe. A method of manufacturing a metal pipe for soldering, comprising a guide member in a tube insertion hole, which is carried out continuously. The method of claim 7, wherein the inner edge portion in the pipe-forming state by pressing and deforming the inner edge portion of both ends of the lower hole 131 in the longitudinal direction before bending the belt-shaped plated plate 130 into the arc portion 139 It is formed in the taper portion 133 positioned parallel to the tube insertion direction, and the outer edges of both ends of the lower hole in the longitudinal direction are outwardly in the pipe forming state until the middle of the thickness of the tube insertion direction. A method of manufacturing a soldering metal pipe having a guide member in a tube insertion hole, characterized in that it is formed with a vertical shear portion 134 which is inclined in a shape that opens toward the side. 5. The method according to claim 4, wherein after the hole 32 for escaping the gout is formed in a predetermined portion of the press-fitting portion 31 in the belt-shaped plated plate 130, the peripheral portion including the hole for escaping the gush is pressed. And a press fitting portion (31) for producing a metal pipe for soldering, wherein the guide member is held in the tubing insertion hole. The vertical surface parallel to the thickness direction of the outer end edge 31a of the press-fitting portion 31 is slightly outwardly before bending of the strip-shaped platelet 130 to the arc portion 139. A method for manufacturing a soldering metal pipe having a guide member in a tubing insertion hole, characterized in that it is formed with an inclined surface. The method of claim 8, wherein the inner edge portion of the lower hole 131 is deformed in a pipe forming state by pressing and deforming both inner edge portions of the lower hole 131 in the longitudinal direction before bending the strip-shaped plated plate 130 to the arc portion 139. It is formed in the taper portion 133 positioned parallel to the tube insertion direction, and the outer edges of both ends of the lower hole in the longitudinal direction are outwardly in the pipe forming state until the middle of the thickness of the tube insertion direction. A method of manufacturing a soldering metal pipe having a guide member in a tubing insertion hole, characterized in that it is formed with a vertical shear portion 134 which is inclined in a shape that opens toward the side.