JP3745501B2 - Cylindrical processing equipment for header pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylinder processing apparatus for a header pipe for manufacturing a cylindrical header pipe by abutting a pair of halved cylindrical portions disposed opposite to each other at a predetermined angle on both sides of a connecting portion.
[0002]
[Prior art]
Conventionally, in a heat exchanger such as a condenser of an automobile, for example, as disclosed in Japanese Utility Model Laid-Open No. 4-63982, a partition is provided in a header to change a fluid flow path.
[0003]
Conventionally, this type of partitioned heat exchanger header is manufactured as described below.
First, as shown in FIG. 4 (a), an aluminum alloy pipe material whose outer surface is clad with a brazing material is cut into a predetermined dimension, and a header pipe 11 is obtained.
Thereafter, as shown in (b), a tube insertion hole 13, a divide slit 15, a fluid inlet 17 and a fluid outlet 19 are formed in the pipe 11.
[0004]
Next, as shown in (c), an aluminum alloy divide 21 clad with brazing material on both sides is inserted into the divide slit 15, and an aluminum alloy patch 23 is press-fitted into both ends of the pipe ll. .
However, in such a conventional header for a heat exchanger with a partition, since an expensive pipe material formed in a cylindrical shape in advance is used, there is a problem that the material cost increases.
[0005]
Further, there is a problem that a brazing failure between the pipe 11 and the divider 21 may occur.
Conventionally, as a solution to such a problem, a method of manufacturing a pipe with a partition disclosed in Japanese Patent Application Laid-Open No. 7-314035 filed earlier by the present applicant is known.
[0006]
In this method of manufacturing a pipe with a partition, as shown in FIGS. 5 and 6, a pipe with a partition is manufactured in which a partition portion 33 including a pair of half-partition portions 32 is formed at the center of a cylindrical pipe portion 31. Is done.
And this pipe with a partition is manufactured as follows.
First, by a forming step shown in FIG. 7, a plate material made of aluminum is formed to form a pair of halved cylindrical portions 35.
[0007]
The pair of halved cylindrical portions 35 are formed in parallel via an arc-shaped connecting portion 37.
The pair of halved cylindrical portions 35 are formed with U-shaped partition forming portions 39 protruding inward.
The radius of the pair of half cylindrical portions 35 is made about 2 mm smaller than the radius of the pipe portion 31 to be formed, and an edge portion 41 is formed outside the half cylindrical portion 35.
[0008]
The molding process described above is performed by sandwiching a flat plate between predetermined molds and press molding.
Next, by the cutting step shown in FIG. 8, the connecting portion 37 located between the partition forming portions 39 indicated by hatching in FIG. 8A and the edge portions 41 located on both sides of the partition forming portion 39 are left over. It is excised together with the part 41a.
[0009]
This cutting process is performed by trim piercing with a press machine.
Thereafter, the partition forming portion 39 is compressed from both sides by the compression step shown in FIG. 9 to form the half partition portion 32.
In this compression step, as shown in FIG. 10, the outer side of the half cylinder portion 35 is pressed by a work presser 51 urged by a spring 49, while the both sides of the partition molding portion 39 inside the half cylinder portion 35. In addition, the compression member 53 is disposed, and the partition forming portion 39 is compression-molded by the compression member 53.
[0010]
In this compression molding, the dimension correction block 55 is disposed between the compression members 53, and the projection length H to the inside of the half partition 32 is corrected by the dimension correction block 55.
Next, the edge portions 41 on both sides of the pair of half cylinder portions 35 are formed by the edge portion forming step shown in FIG. 11, and the edge portions 41 are formed into the half cylinder portions 35 as shown in FIG. It is formed in the following arc shape.
[0011]
This edge forming step is performed by sandwiching a pair of halved cylindrical portions 35 between predetermined dies and press forming them.
Thereafter, in the facing step shown in FIG. 12, the connecting portion 37 is protruded from the inside, and the pair of half cylindrical portions 35 are disposed to face each other.
This facing step is performed by accommodating the outer side of the half cylinder portion 35 in the mold 57 and pressing the connecting portion 37 against the arc portion 61 of the mold 57 by the punch 59.
[0012]
Next, the pair of halved cylindrical portions 35 in an opposed state are abutted by the abutting step shown in FIG.
This abutting step is performed by accommodating the outside of the half cylinder portion 35 in a pair of molds (not shown) and moving the mold. At this time, the half cylinder portion 35 is formed into a pipe shape. .
[0013]
Then, a joining process is performed, a pair of half cylinder part 35 and a pair of half partition part 32 are joined mutually, and the pipe with a partition shown in FIG.5 and FIG.6 is manufactured.
This joining process is performed by brazing using a non-corrosive flux, for example.
[0014]
FIG. 14 shows a header for a partitioned heat exchanger manufactured by such a manufacturing method for a pipe with a partition, and the partitioned heat exchanger header has a partition section 33 at the center of a cylindrical pipe section 31A. Is formed.
A tube insertion hole 63 is formed on one side of the outer periphery of the pipe portion 31A at a predetermined interval.
[0015]
Further, both end openings of the pipe portion 31 </ b> A are closed by the lid member 65.
In this method of manufacturing a header for a heat exchanger with partitions, after the edge forming step shown in FIG. 11, as shown in FIG. 15, the tube insertion holes 63 are formed in one half cylindrical portion 35 at a predetermined interval. At the same time, a fluid inlet 65 and a fluid outlet 67 through which the heat medium flows in and out are formed.
[0016]
This step is performed by slit piercing with a press machine.
In such a heat exchanger header with a partition, since it is possible to easily obtain the pipe portion 31A integrally formed with the partition portion 33 from a single plate material, an expensive pipe material previously formed in a cylindrical shape is used. There is no need to use it, and the material cost can be greatly reduced as compared with the prior art.
[0017]
Further, since the partition is made as one body, the number of parts can be reduced and the cost can be reduced as compared with the production with a cylindrical pipe.
Furthermore, since the tube insertion hole 63 can be processed in a semicircular state, the strength of the mold of the tube insertion hole 63 can be sufficiently increased, the processing time can be shortened, and the cost can be reduced.
[0018]
In addition, since the pair of half cylinders 35 and the half partitions 32 can be reliably joined by brazing, it is possible to reliably prevent the heat medium from leaking from the partitions 33 to the outside.
[0019]
[Problems to be solved by the invention]
However, in such a conventional method for manufacturing a header for a partitioned heat exchanger, when the pair of halved cylindrical portions 35 are pressed together by a pair of molds in the butting step shown in FIG. As shown in the figure, there was a problem that indentations 68 were formed on both sides of the portion that was the connecting portion 37 in the facing step of FIG. 12, and a protrusion 69 was formed at the center of the portion that was the connecting portion 37 at the same time.
[0020]
That is, if both sides of the portion that was the connecting portion 37 are recessed and the center of the portion that was the connecting portion 37 protrudes at the same time, it is difficult to reliably braze the piping connector, the mounting bracket, and the like. .
[0021]
As a result of earnest research to solve such a conventional problem, the present inventor shows that the both sides of the portion that is the connecting portion 37 are recessed and the center of the portion that is the connecting portion 37 protrudes at the same time. It has been found that the processing flaw at the time of forming the connecting portion 37 in the forming step shown in FIG.
The present invention has been made on the basis of such knowledge, and is a header pipe that can reliably butt-process a pair of halved cylindrical portions that are opposed to each other with a predetermined angle on both sides of the connecting portion. An object is to provide a cylindrical machining apparatus.
[0022]
[Means for Solving the Problems]
The cylinder processing apparatus for a header pipe according to claim 1 is a cylinder processing of a header pipe for producing a cylindrical header pipe by abutting a pair of half-cylinder portions opposed to each other at a predetermined angle on both sides of a connecting portion. In the apparatus, a lifter that supports the connecting portion, an urging means that urges the lifter toward the connecting portion, and is rotatably disposed on both sides of the lifter. A pair of punches formed with mating semicircular butting recesses, and a pressing means for moving the pair of punches toward the pair of half-split cylindrical portions and rotating toward the connecting portion side It is characterized by having.
[0023]
A cylinder processing apparatus for a header pipe according to a second aspect of the present invention is the cylinder processing apparatus for a header pipe according to the first aspect, further comprising a lifter pressing lever that rotates together with the punch to press the lifter.
The header pipe cylinder processing apparatus according to claim 3, wherein the header pipe cylinder processing apparatus has stop means for stopping movement of the lifter at a bottom dead center of the pressing means. To do.
[0024]
(Function)
In the header pipe cylindrical processing apparatus according to claim 1, the pressing means is operated in a state where the pair of half-cylinder portions opposed to each other at a predetermined angle are placed on both sides of the connecting portion and placed on the lifter. Due to the movement toward the split cylindrical portion, the recesses for butting the punches, which are rotatably arranged on both sides of the lifter, are fitted to the outer peripheries of the pair of half split cylindrical portions, and then the punch is rotated by the pressing means. Thus, the pair of halved cylindrical portions are brought into contact with each other.
[0025]
At this time, the connecting portion between the pair of halved cylindrical portions is always pressed with a predetermined pressure by the urging means via the lifter, so that the processing rod at the time of forming the connecting portion may be restored. Be blocked.
In the cylindrical processing apparatus of the header pipe according to the second aspect, the lifter pressing lever is rotated together with the punch, the lifter is pressed against the urging force of the urging means, and the pressing force acting on the connecting portion is restricted.
[0026]
In the cylindrical processing apparatus of the header pipe according to claim 3, the movement of the lifter is stopped at the bottom dead center of the pressing means by the stopping means, and the butted portions of the pair of half cylindrical portions are deformed by the further rotation of the punch. Be blocked.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0028]
1 and 2 show a first embodiment of a cylindrical processing apparatus for header pipe according to the present invention. Reference numeral 71 denotes a lifter on which a workpiece 73 is placed.
In this embodiment, the work piece 73 is formed on both sides of the connecting portion 37 by arranging a pair of half cylindrical portions 35 so as to face each other at a predetermined angle.
The lifter 71 is accommodated in the holding member 75 so as to be movable in the vertical direction.
[0029]
A flange 71 a is formed at the lower end of the lifter 71, and the flange 71 a is in contact with an inner flange 75 a formed at the upper end of the holding member 75, thereby preventing the lifter 71 from coming off from the holding member 75. ing.
The lower end of the holding member 75 is fixed to the base member 77, and a coil spring 79, which is an urging means for urging the lifter 71 upward, is interposed between the base member 77 and the flange portion 71a of the lifter 71. A plurality are arranged at predetermined intervals in the longitudinal direction of 71.
[0030]
The base member 77 is fixed to the lower holder 81.
A pair of punches 83 are rotatably disposed on both sides of the lifter 71.
The punch 83 is formed with a semicircular butting recess 83 a that fits to the outer periphery of the half cylinder portion 35.
A rectangular support portion 83 b is formed at the rear end of the punch 83, and the support portion 83 b is fitted and fixed to a rectangular recess 85 a formed on the rotating shaft 85.
[0031]
The rotating shaft 85 is rotatably supported by an arcuate recess 87 a formed on the cam slide 87 disposed on both sides of the lifter 71.
The rotary shaft 85 is formed with a notch groove 85a, and the pair of punches 83 are opened by urging the notch groove 85a with a plunger 89.
The cam slide 87 is movable in the horizontal direction along the guide member 91 and is biased outward by a biasing mechanism (not shown).
[0032]
The guide member 91 is fixed to the base member 77.
Above the lower holder 81, an upper holder 93 that is a pressing means is arranged.
In the center of the upper holder 93, a block member 95 for pressing the pair of punches 83 downward is disposed at a position above the lifter 71.
Cam drivers 97 are arranged on both sides of the upper holder 93.
[0033]
The cam driver 97 is disposed so as to be insertable between the backup heel 99 disposed on both sides of the lower holder 81 and the cam slide 87.
The cam driver 97 is formed with a cam surface 97 a that contacts the cam surface 87 b of the cam slide 87.
[0034]
In the header pipe cylindrical processing apparatus described above, the butt processing of the pair of halved cylindrical portions 35 is performed as described below.
First, as shown in FIG. 1, the cam surface 97 a of the cam driver 97 is brought into contact with the cam surface 97 b of the cam slide 87 and the pair of punches 83 are opened by the plunger 89. In addition, a workpiece 73 in which a pair of halved cylindrical portions 35 are arranged to face each other on both sides of the connecting portion 37 is placed.
[0035]
In this state, the block member 95 of the upper holder 93 is sufficiently separated from the pair of punches 83, and the pair of cam slides 87 is sufficiently separated.
From this state, when the upper holder 93 as the pressing means is moved downward, the cam surface 87b of the cam slide 87 is pressed by the cam surface 97a of the cam driver 97, and the pair of cam slides 87 moves in the opposite direction. The cam surface 97a of the cam driver 97 is disengaged from the cam surface 87b of the cam slide 87, and the cam driver 97 can be pivoted to both sides of the lifter 71 with the cam driver 97 completely positioned between the cam slide 87 and the backup heel 99. The butted recess 83a of the punch 83 to be disposed is fitted to the outer periphery of the pair of halved cylindrical portions 35.
[0036]
In this state, the block member 95 of the upper holder 93 is in contact with the upper ends of the pair of punches 83. When the upper holder 93 is moved downward from this state, the pair of punches 83 are rotated, and this rotation is performed. By the movement, as shown in FIG. 2, the pair of halved cylindrical portions 35 are abutted.
At this time, the connecting portion 37 between the pair of half cylinder portions 35 is always pressed with a predetermined pressure by the coil spring 79 via the lifter 71, so that the processing wrinkle at the time of forming the connecting portion 37 is reduced. Resurrection is prevented.
[0037]
In the header pipe cylindrical processing apparatus configured as described above, the coupling portion 37 between the pair of half-split cylindrical portions 35 is always pressed by the coil spring 79 via the lifter 71 at a predetermined pressure. It is prevented that the processing rod at the time of molding of the connecting portion 37 is restored, and thus, the pair of half-cylindrical portions 35 arranged opposite to each other at a predetermined angle on both sides of the connecting portion 37 are reliably butted in a cylindrical shape. Can be processed.
[0038]
FIG. 3 shows a second embodiment of the header pipe cylindrical processing apparatus of the present invention. In this embodiment, a lifter pressing lever 101 that rotates together with the punch 83 and presses the lifter 71 is disposed.
A rectangular attachment portion 101 a is formed at the rear end of the lifter pressing lever 101, and the attachment portion 101 a is fixed to the end surface of the support portion 83 b of one punch 83.
[0039]
In addition, a cylindrical pressing portion 101 b is formed at the tip of the lifter pressing lever 101.
The pressing portion 101b has an outer diameter that is substantially the same as the outer diameter when the pair of halved cylindrical portions 35 are butted, and the center thereof is the same as the center of the butting recess 83a formed in the punch 83. Located in position.
[0040]
In this embodiment, stop means for stopping the movement of the lifter 71 at the bottom dead center of the upper holder 93 is arranged.
This stopping means is composed of the positioning block 103, is arranged below the lifter 71 inside the holding member 75, and is fixed to the base member 77.
In the header pipe cylindrical processing apparatus of this embodiment, since the lifter pressing lever 101 that rotates together with the punch 83 and presses the lifter 71 is disposed, the pressing force acting on the connecting portion 37 is restricted, and thereby the biasing means The biasing force of a certain coil spring 79 can be increased.
[0041]
That is, in the header pipe cylindrical processing apparatus of the first embodiment, the length of the lifter 71 in the longitudinal direction is required in order to apply the same apparatus to the required header pipes of various lengths. If the length of the longest header pipe that can be processed is set and the biasing force of the coil spring 79 is set to correspond to this length, the biasing force of the coil spring 79 becomes large and the workpiece 73 having a short length is processed. When doing so, the workpiece 73 may be deformed inward.
[0042]
However, in this embodiment, since the lifter pressing lever 101 that rotates together with the punch 83 and presses the lifter 71 is disposed, the pressing force acting on the connecting portion 37 is restricted, and thereby the coil spring 79 that is a biasing means is controlled. The biasing force can be set to a biasing force capable of processing the longest required header pipe.
In the header pipe cylindrical processing apparatus described above, the movement of the lifter 71 is stopped at the bottom dead center of the upper holder 93 by the positioning block 103, so that the punch 83 is reliably rotated at the bottom dead center. It is stopped, and it is possible to reliably prevent the butted portions of the pair of half cylinder portions 35 from being deformed by the further rotation of the punch 83.
[0043]
【The invention's effect】
As described above, in the cylindrical processing apparatus of the header pipe according to claim 1, the connecting portion between the pair of halved cylindrical portions is always pressed at a predetermined pressure by the biasing means via the lifter. It is prevented that the processing rods at the time of molding of the connecting portion are restored, and thereby, a pair of half-cylindrical cylindrical portions that are arranged to face each other at a predetermined angle on both sides of the connecting portion are reliably butted into a cylindrical shape. Can do.
[0044]
In the cylindrical processing apparatus for the header pipe according to claim 2, since the lifter pressing lever that rotates together with the punch and presses the lifter is disposed, the pressing force acting on the connecting portion is restricted, thereby increasing the biasing force of the biasing means. can do.
In the cylindrical processing apparatus for the header pipe according to claim 3, since the movement of the lifter is stopped at the bottom dead center of the pressing means by the stop means, the rotation of the punch is surely stopped at the bottom dead center, and the further punch It is possible to reliably prevent the butted portions of the pair of half-cylindrical portions from being deformed by the rotation.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view showing a state before processing of a first embodiment of a cylindrical processing apparatus for a header pipe of the present invention.
2 is a front view showing a state after processing of the cylindrical processing apparatus for the header pipe of FIG. 1; FIG.
FIG. 3 is a front view showing a state after processing of the second embodiment of the cylindrical processing apparatus of the header pipe of the present invention.
FIG. 4 is an explanatory view showing a conventional method for manufacturing a pipe with partition.
FIG. 5 is a cross-sectional view showing a pipe with a partition manufactured by a conventional method for manufacturing a pipe with a partition.
6 is a cross-sectional view taken along line II-II in FIG.
FIG. 7 is an explanatory view showing a conventional molding process.
FIG. 8 is an explanatory view showing a conventional cutting process.
FIG. 9 is an explanatory view showing a conventional compression process.
10 is an explanatory diagram showing a state in which the compression process of FIG. 9 is performed. FIG.
FIG. 11 is an explanatory view showing a conventional edge forming step.
FIG. 12 is an explanatory view showing a conventional facing process.
FIG. 13 is an explanatory view showing a conventional matching process.
FIG. 14 is a side view showing a conventional header pipe with a partition in which a tube insertion hole is formed.
FIG. 15 is an explanatory view showing a conventional tube insertion hole forming step.
FIG. 16 is an explanatory view showing header pipes that have been matched by a conventional matching process.
[Explanation of symbols]
35 Half-divided cylindrical part 37 Connecting part 71 Lifter 79 Coil spring 83 Punch 83a Butting recess 93 Upper holder 101 Lifter pressing lever 103 Positioning block

Claims (3)

In a cylinder processing apparatus for a header pipe for manufacturing a cylindrical header pipe by abutting a pair of half cylinder portions (35) arranged opposite to each other at a predetermined angle on both sides of a connecting portion (37),
A lifter (71) for supporting the connecting portion (37);
Biasing means (79) for biasing the lifter (71) toward the connecting portion (37);
A pair of punches (83) in which semicircular butting recesses (83a) that are rotatably arranged on both sides of the lifter (71) and are fitted on the outer periphery of the pair of half cylinders (35) are formed. When,
A pressing means (93) for moving the pair of punches (83) toward the pair of halved cylindrical portions (35) and rotating toward the connecting portion (37);
A cylinder processing apparatus for a header pipe, comprising: In the cylindrical processing apparatus of the header pipe according to claim 1,
A cylinder processing apparatus for a header pipe, comprising a lifter pressing lever (101) that rotates together with the punch (83) to press the lifter (71). In the cylindrical processing apparatus of the header pipe according to claim 1 or 2,
A cylinder processing apparatus for a header pipe, comprising stop means (103) for stopping the movement of the lifter (71) at a bottom dead center of the pressing means (93).

Images