JPH11734A - Cylindrically working device of header pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely butt in a cylindrical shape a pair of half-split cylindrical parts which are arranged opposite to each other with the prescribed angle on each side of a connection part in a cylindrically working device of a header pipe to manufacture the cylindrical header pipe by batting a pair of half-split cylindrical parts to each other. SOLUTION: A cylindrically working device of a header pipe is provided with a lifter 71 to support a connection part 37, an energizing means 79 to energize the lifter 71 against the connection part 37 side, a pair of punches 83 in which semi-circular recessed parts 83a for butting which are turnably arranged can etch side of the lifter 71 and fitted to the outer circumference of a pair of half-split cylindrical parts 35, and a pressing means 93 which moves a pair of punches 83 to the side of a pair of half-split cylindrical parts 35 and turns them toward the connection part 37 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a header pipe cylinder processing apparatus for manufacturing a cylindrical header pipe by abutting a pair of half-cylindrical sections opposed to each other at a predetermined angle on both sides of a connecting section. About.

[0002]

2. Description of the Related Art Conventionally, in a heat exchanger such as a condenser of an automobile, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 4-63682, a partition is provided in a header to change a fluid flow path. Have been.

[0003] Conventionally, this type of header for a heat exchanger with a partition is manufactured as described below.
First, as shown in FIG. 4A, a pipe material of an aluminum alloy having an outer surface clad with a brazing material is cut into a predetermined size, and a pipe 11 for a header is obtained. Thereafter, as shown in (b), a tube insertion hole 13, a divide slit 15, and a fluid inlet 1 are formed in the pipe 11 as shown in FIG.
7. A fluid outlet 19 is formed.

Next, as shown in FIG. 1C, a divide 21 of an aluminum alloy clad with a brazing material on both surfaces is inserted into the divide slit 15 and a pipe 11 is formed.
, Aluminum alloy patches 23 are press-fitted into both ends. However, in such a conventional header for a heat exchanger with a partition, an expensive pipe material formed in a cylindrical shape in advance is used, so that there is a problem that the material cost increases.

Further, there is a problem that a brazing defect between the pipe 11 and the divide 21 may occur. Conventionally,
As a solution to such a problem, there is known a method of manufacturing a pipe with a partition disclosed in Japanese Patent Application Laid-Open No. 7-314035, which was previously filed by the present applicant.

In this method of manufacturing a pipe with a partition, FIG.
As shown in FIG. 6, a partitioned pipe in which a partition portion 33 including a pair of half-divided partition portions 32 is formed at the center of a cylindrical pipe portion 31 is manufactured. This pipe with a partition is manufactured as described below.
First, in a forming step shown in FIG. 7, a plate material made of aluminum is formed to form a pair of half-cylindrical portions 35.

[0007] The pair of half-cylindrical portions 35 are formed in parallel via an arc-shaped connecting portion 37. And
The pair of half-cylindrical portions 35 are formed with U-shaped partition forming portions 39 protruding inward. The radius of the pair of half-cylindrical cylindrical portions 35 is two times larger than the radius of the pipe portion 31 to be formed.
An edge portion 41 is formed outside the half-cylindrical portion 35.

The above-described molding step is performed by sandwiching a flat plate between predetermined molds and press-molding. Next, by the cutting process shown in FIG. 8, the connecting portions 37 located between the partition forming portions 39 indicated by oblique lines in FIG. 8A and the edge portions 41 located on both sides of the partition forming portion 39 are left over. It is cut off together with the part 41a.

This cutting step is performed by trim piercing with a press machine. Thereafter, in the compression step shown in FIG. 9, the partition forming section 39 is compressed from both sides to form the half-divided partition section 32. This compression step is shown in FIG.
As shown in FIG. 0, the outside of the half cylinder 35 is held down by a work holder 51 urged by a spring 49, while the partition molding 39 inside the half cylinder 35.
This is performed by arranging compression members 53 on both sides of the partition member and compression-forming the partition forming portion 39 with the compression members 53.

In this compression molding, between the compression members 53,
A dimensional correction block 55 is arranged, and the dimensional correction block 55 corrects the protruding length H to the inside of the half-split part 32. Next, by the edge forming step shown in FIG.
Edges 41 on both sides of the pair of half-cylindrical portions 35 are formed,
As shown in (b) of the figure, the edge portion 41 is divided into half the cylindrical portion 35.
Is formed in the shape of an arc following.

This edge forming step is performed by holding a pair of half-cylindrical portions 35 between predetermined molds and press-forming. Thereafter, the facing step shown in FIG.
The connecting portion 37 is protruded from the inside, and the pair of half-cylindrical portions 3
5 are arranged facing each other. This facing process is performed by the half cylindrical part 3
The outside of the mold 5 is accommodated in a mold 57, and the connecting portion 37 is pressed against an arc 61 of the mold 57 by a punch 59.

Next, in a butting process shown in FIG. 13, the pair of half-cylinder portions 35 facing each other are butted. The butting process is performed by housing the outside of the half-cylindrical portion 35 in a pair of dies (not shown) and moving the dies. At this time, the half-cylindrical portion 35 is formed into a pipe shape. .

Thereafter, a joining process is performed, and the pair of half-cylindrical portions 35 and the pair of half-partition portions 32 are joined to each other to produce the pipe with a partition shown in FIGS. . This joining step is performed by, for example, brazing using a non-corrosive flux.

FIG. 14 shows a header for a partitioned heat exchanger manufactured by such a method for manufacturing a partitioned pipe. The header for the partitioned heat exchanger is provided at the center of a cylindrical pipe portion 31A. A part 33 is formed. Further, a tube insertion hole 63 is formed on one side of the outer periphery of the pipe portion 31A at a predetermined interval.

Further, both ends of the pipe portion 31A are closed by a 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, tube insertion holes 63 are formed in one half-cylindrical portion 35 at predetermined intervals. At the same time, a fluid inlet 65 and a fluid outlet 67 through which the heat medium flows in and out are formed.

This step is performed by a slit machine using a press machine.
This is performed by piercing. In such a header for a heat exchanger with a partition, the partition portion 3 is formed from a single plate.
Since it becomes possible to easily obtain the integrally formed pipe portion 31A, it is not necessary to use an expensive pipe material formed in a cylindrical shape in advance, and the material cost can be significantly reduced as compared with the conventional case. become.

Further, as compared with the case of manufacturing with a cylindrical pipe, since the partition is integrally formed, the number of parts can be reduced and the cost can be reduced. Further, the tube insertion hole 63
Can be machined in a semicircular state, so that the tube insertion hole 63
In this case, the strength of the mold can be sufficiently secured, the processing time can be shortened, and the cost can be reduced.

Further, since the pair of half-cylindrical portions 35 and half-partition portions 32 can be securely joined by brazing, it is possible to reliably prevent the heat medium from leaking from the partition portions 33 to the outside. Can be.

[0019]

However, in such a conventional method for manufacturing a header for a heat exchanger with a partition, a pair of half-cylindrical cylindrical portions 35 are pressed by a pair of dies in a butting process shown in FIG. Then, as shown in FIG. 16, recesses 68 are formed on both sides of the portion that was the connecting portion 37 in the facing step of FIG.
At the same time, there is a problem that a projection 69 is formed at the center of the portion that was the connecting portion 37.

That is, when the both sides of the portion which was the connecting portion 37 are depressed and the center of the portion which was the connecting portion 37 projects at the same time, the brazing of the piping connector, the mounting bracket and the like can be surely performed. It becomes difficult.

The inventor of the present invention has made intensive studies to solve such a conventional problem. As a result, both sides of the connecting portion 37 are depressed, and at the same time, the center of the connecting portion 37 protrudes. Are the connecting portions 37 in the forming step shown in FIG.
It was found that the processing habit at the time of molding was to be revived. The present invention has been made based on such knowledge,
An object of the present invention is to provide a header pipe cylindrical processing device capable of reliably butting a pair of half-cylindrical cylindrical portions opposed to each other at a predetermined angle on both sides of a connecting portion into a cylindrical shape.

[0022]

According to the first aspect of the present invention, a cylindrical header pipe is formed by abutting a pair of half-cylindrical portions opposed to each other at a predetermined angle on both sides of a connecting portion. In a cylindrical processing device for a header pipe for manufacturing, a lifter that supports the connecting portion, and a biasing unit that biases the lifter toward the connecting portion,
A pair of punches, which are rotatably arranged on both sides of the lifter and have a semicircular butting recess formed to fit on the outer periphery of the pair of half-cylindrical cylinders, and And a pressing unit that moves toward the cylindrical portion and rotates toward the connecting portion.

According to a second aspect of the present invention, there is provided a header pipe cylindrical machining apparatus according to the first aspect, further comprising a lifter pressing lever which rotates together with the punch and presses the lifter. Claim 3
The header pipe cylindrical processing device according to claim 1 or 2
The cylindrical processing apparatus for a header pipe as described above, further comprising a stopping means for stopping the movement of the lifter at a bottom dead center of the pressing means.

(Action) In the cylindrical apparatus for processing a header pipe according to the first aspect, the pressing means is arranged such that the pair of half-cylindrical sections which are opposed to each other at a predetermined angle on both sides of the connecting section are placed on the lifter and the pressing means is provided. When the punch is moved to the half-cylindrical portion side of the punch, the butting recesses of the punch rotatably arranged on both sides of the lifter are fitted to the outer circumferences of the pair of half-cylindrical portions, and then pressed. The pair of half-cylindrical cylinders are butted by the rotation of the punch by the means.

At this time, since the connecting portion between the pair of half-cylindrical cylindrical portions is constantly pressed at a predetermined pressure via the lifter by the urging means, the processing habit of the forming of the connecting portion is restored. Is prevented. According to the second aspect of the present invention, the lifter pressing lever is rotated together with the punch, and the lifter is pressed against the urging force of the urging means, so that the pressing force acting on the connecting portion is regulated.

According to the third aspect of the present invention, the movement of the lifter is stopped at the bottom dead center of the pressing means by the stopping means, and the butting portion of the pair of half-cylindrical cylindrical parts is deformed by the further rotation of the punch. Is prevented.

[0027]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of a header pipe cylindrical machining apparatus according to the present invention. Reference numeral 71 denotes a lifter on which a workpiece 73 is placed. In this embodiment, the workpiece 73 is formed by arranging a pair of half-cylindrical portions 35 on both sides of the connecting portion 37 at a predetermined angle. The lifter 71 includes a holding member 75
It is movably accommodated in the vertical direction.

A flange 71a is formed at the lower end of the lifter 71. The flange 71a comes into contact with an inner flange 75a formed at the upper end of the holding member 75, so that the lifter 71 can be removed from the holding member 75. Has been blocked. The lower end of the holding member 75 is fixed to the base member 77,
Between the base member 77 and the flange 71a of the lifter 71, a plurality of coil springs 79, which are urging means for urging the lifter 71 upward, are arranged at predetermined intervals in the longitudinal direction of the lifter 71.

The base member 77 is fixed to the lower holder 81. On both sides of the lifter 71, a pair of punches 83 are rotatably arranged. The punch 83 is formed with a semicircular butted concave portion 83a fitted on the outer periphery of the half-cylindrical cylindrical portion 35. At the rear end of the punch 83, a rectangular support portion 83b is formed. The support portion 83b is formed in a rectangular recess 85 formed on the rotating shaft 85.
a.

The rotary shaft 85 is formed with an arc-shaped concave portion 87a formed on a cam slide 87 disposed on both sides of the lifter 71.
Is rotatably supported. A notch groove 85 a is formed in the rotating shaft 85, and the notch groove 85 a is urged by a plunger 89, so that a pair of punches 83 are opened. The cam slide 87 is movable in the horizontal direction along the guide member 91, and is urged outward by an urging mechanism (not shown).

The guide member 91 is fixed to the base member 77. Above the lower holder 81, an upper holder 93 serving as a pressing means is arranged. In the center of the upper holder 93, a pair of punches 8 is provided at a position above the lifter 71.
A block member 95 for pressing the third member 3 downward is provided. Further, cam drivers 97 are arranged on both sides of the upper holder 93.

The cam driver 97 is arranged so as to be inserted between the backup heel 99 arranged on both sides of the lower holder 81 and the cam slide 87. The cam driver 97 is provided with a cam surface 97a that contacts the cam surface 87b of the cam slide 87.

In the above-described cylindrical apparatus for processing a header pipe, the butting of the pair of half-cylindrical sections 35 is performed as described below. First, as shown in FIG.
A cam driver 97 is provided on the cam surface 97b of the cam slide 87.
With the pair of punches 83 opened by the plunger 89, the pair of half-cylindrical portions 35 face the upper surface of the lifter 71 at predetermined angles on both sides of the connecting portion 37. The placed workpiece 73 is placed thereon.

In this state, the block member 95 of the upper holder 93 is sufficiently separated from the pair of punches 83,
Further, the pair of cam slides 87 are sufficiently separated. When the upper holder 93, which is a pressing means, is moved downward from this state, 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 the cam surface 87 of the cam slide 87.
b, the cam driver 97 is completely located between the cam slide 87 and the backup heel 99,
Butts 83a of the punches 83 rotatably arranged on both sides of the lifter 71 are fitted to the outer circumferences of the pair of half-cylindrical cylindrical portions 35.

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 rotate, and by this rotation, the pair of half-cylindrical cylindrical portions 35 abut as shown in FIG. At this time, the connecting portion 37 between the pair of half-cylindrical cylindrical portions 35 is connected to the lifter 71 by the coil spring 79.
, The pressing force is always pressed at a predetermined pressure, so that the habit of forming the connecting portion 37 at the time of molding is prevented from being restored.

In the header pipe cylindrical machining apparatus configured as described above, the connecting portion 37 between the pair of half-cylindrical cylindrical portions 35 is constantly pressed at a predetermined pressure by the coil spring 79 via the lifter 71. Because the connection part 37
It is prevented that the working habit at the time of molding is restored, whereby the pair of half-cylindrical portions 35 which are opposed to each other at a predetermined angle on both sides of the connecting portion 37 are securely butted into a cylindrical shape. Can be.

FIG. 3 shows a second embodiment of the cylinder processing apparatus for a header pipe according to the present invention. In this embodiment, a lifter pressing lever 101 which rotates together with a punch 83 and presses a lifter 71 is arranged. ing. At the rear end of the lifter pressing lever 101, a rectangular mounting portion 101a is formed, and the mounting portion 101a is fixed to an end face of a support portion 83b of one punch 83.

At the tip of the lifter pressing lever 101, a columnar pressing portion 101b is formed. The pressing portion 101b has an outer diameter that is substantially the same as the outer diameter when the pair of half-cylindrical cylindrical portions 35 are abutted.
It is located at the same position as the center of the butting recess 83 a formed on the punch 83.

In this embodiment, a stop means for stopping the movement of the lifter 71 at the bottom dead center of the upper holder 93 is provided. This stopping means is composed of a positioning block 103, is disposed below the lifter 71 inside the holding member 75, and is fixed to the base member 77. In the header pipe cylindrical processing device of this embodiment, the lifter pressing lever 101 that rotates together with the punch 83 and presses the lifter 71 is disposed, so that the pressing force acting on the connecting portion 37 is regulated, and thereby the urging means is used. The urging force of a certain coil spring 79 can be increased.

That is, in the header pipe cylindrical machining apparatus of the first embodiment, in order to apply the same apparatus to header pipes of various required lengths, the length of the lifter 71 in the longitudinal direction is reduced. If the longest required header pipe can be machined and the biasing force of the coil spring 79 is set in accordance with this length, the biasing force of the coil spring 79 increases, and the work piece having a short length is reduced. 73
When processing is performed, the workpiece 73 may be deformed inward.

However, in this embodiment, since the lifter pressing lever 101 which rotates together with the punch 83 and presses the lifter 71 is arranged, the pressing force acting on the connecting portion 37 is regulated, and the coil acting as the urging means is thereby controlled. It is possible to set the biasing force of the spring 79 to a biasing force capable of processing the required longest header pipe. Further, in the above-described cylindrical processing device for a header pipe, since the movement of the lifter 71 is stopped at the bottom dead center of the upper holder 93 by the positioning block 103, the rotation of the punch 83 is surely performed at the bottom dead center. It is possible to reliably prevent the butted portion of the pair of half-cylindrical portions 35 from being deformed by being stopped and further rotated by the punch 83.

[0043]

As described above, in the header pipe cylindrical processing apparatus of the first aspect, the connecting portion between the pair of half-cylindrical cylindrical portions is always pressed at a predetermined pressure via the lifter by the biasing means. Because of this, it is prevented that the processing habit during molding of the connecting portion is restored, and thereby, a pair of half-cylindrical cylindrical portions that are opposed to each other at a predetermined angle on both sides of the connecting portion,
Butt processing can be performed reliably in a cylindrical shape.

According to the second aspect of the present invention, since the lifter pressing lever which rotates together with the punch and presses the lifter is arranged, the pressing force acting on the connecting portion is regulated, and thereby the urging means is provided. You can increase your power. In the header pipe cylindrical machining apparatus according to the third aspect, the movement of the lifter is stopped at the bottom dead center of the pressing means by the stopping means. It is possible to reliably prevent the butting portion of the pair of half-cylindrical portions from being deformed due to the rotation of.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a header pipe cylindrical processing apparatus of the present invention.
It is a front view showing a state before processing of an embodiment.

FIG. 2 is a front view showing a state after processing of the cylindrical processing device for the header pipe of FIG. 1;

FIG. 3 shows a second example of the header pipe cylindrical processing apparatus of the present invention.
It is a front view showing the state after processing of an embodiment.

FIG. 4 is an explanatory view showing a conventional method for manufacturing a pipe with a partition.

FIG. 5 is a cross-sectional view showing a partitioned pipe manufactured by a conventional method for manufacturing a partitioned pipe.

FIG. 6 is a cross-sectional view taken along the line II-II in FIG.

FIG. 7 is an explanatory view showing a conventional molding step.

FIG. 8 is an explanatory view showing a conventional excision step.

FIG. 9 is an explanatory view showing a conventional compression step.

FIG. 10 is an explanatory diagram showing a state in which the compression step of FIG. 9 is being performed.

FIG. 11 is an explanatory view showing a conventional edge forming step.

FIG. 12 is an explanatory view showing a conventional facing step.

FIG. 13 is an explanatory view showing a conventional butting 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 a header pipe butted by a conventional butting process.

[Explanation of symbols]

 35 Half cylinder 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)

[Claims] 1. A header pipe cylindrical processing device for manufacturing a cylindrical header pipe by abutting a pair of half-cylindrical portions (35) opposed to each other at a predetermined angle on both sides of a connecting portion (37). In the above, a lifter (71) that supports the connecting portion (37), a biasing means (79) that biases the lifter (71) toward the connecting portion (37), and a lifter (71) on both sides of the lifter (71). A pair of punches (83) that are rotatably arranged to form a semicircular butting recess (83a) fitted to the outer periphery of the pair of half-cylindrical cylindrical portions (35); and the pair of punches (83). ) Moving toward the pair of half-cylindrical cylindrical portions (35) and rotating toward the connecting portion (37). apparatus. 2. The apparatus according to claim 1, wherein the lifter (71) rotates together with the punch (83).
A cylindrical processing device for a header pipe, comprising a lifter pressing lever (101) for pressing a cylinder. 3. The header pipe cylindrical processing device according to claim 1, further comprising a stopping means (103) for stopping movement of the lifter (71) at a bottom dead center of the pressing means (93). Characteristic header pipe processing equipment.