JP2003340524A - Method and device for manufacturing member having folding part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily form folding parts without necessitating a die. <P>SOLUTION: In a manufacturing device 20, a belt-like metal sheet 10 constituting an entire width of a side plate 6 is provided. The side plate 6 is continuously formed by forming the folding parts at both end parts of the metal sheet 10 while the metal sheet 10 is conveyed from a tip part 10a to a folding part forming means 24 and cutting the sheet 10 to a prescribed length. The device 20 comprises a conveying passage 21 of the metal sheet 10, and a processing mechanism 23, a preliminary folding mechanism 25 and a folding finishing mechanism 26 as the folding part forming means 24 each disposed on the conveying passage 21, and is provided with a cutting mechanism 27. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a member with a bent portion, in which a bent portion is provided along a length direction at an end portion in the width direction of a metal plate, and an apparatus therefor, and more particularly to a folded portion. The present invention relates to a technique suitable for continuously manufacturing a member with a bent portion.

[0002]

2. Description of the Related Art For example, a heat exchanger used for a car air conditioner or the like is shown in FIG. In the figure, reference numeral 1 is a multi-flow type heat exchanger such as a gas cooler (radiator) or an evaporator (evaporator).
A large number of flat tubes 4 for flowing a refrigerant are connected between the three. Then, when the refrigerant is supplied to the upper part of the header 2 from the inlet 5a connected to the header 2, it flows into the upper part of the header 3 through the flat tube 4 on the upper stage side, and from the header 3 to the flat part on the middle stage side. Header 2 via tube 4
Flat tube 4 flowing into the lower part of the
It is led to the lower part of the header 3 via the and is discharged from the outlet 5b.

A side plate 6 as a member with a bent portion is mounted on the pair of headers 2 and 3. As shown in FIG. 8, the side plate 6 is formed in a U-shape by providing bent portions 6b that stand upright at both ends of the main body 6a. Such a side plate 6 is made of aluminum or its alloy, and when manufactured, as shown in FIG. 9, a material 60 having a dimension in the length direction is preliminarily provided with a notch 61, a hole 62, or the like. And then
The metal plate 63 is cut into the plate width dimensions shown by the chain lines.
Is formed. After that, the cut metal plate 63 is bent by a dedicated mold (not shown) to form the U-shaped side plate 6 shown in FIG. In FIG. 7, reference numeral 7 is a corrugated fin provided between the flat tubes 4 for the purpose of increasing the heat transfer area on the air side for heat exchange with the refrigerant in the flat tubes 4, and 8 is a pair of corrugated fins. A partition member for partitioning the headers 2 and 3 into upper and lower parts.

[0004]

By the way, the side plate 6 as a member with a bent portion as described above is used for the heat exchanger 1, so that the metal plate 6 formed from the raw material 60 is used.
Although 3 is bent and formed in a U shape by a mold, if the type of the heat exchanger 1 is different, side plates having different lengths are used accordingly. Therefore, if you try to mold side plates with different lengths, you have to replace the mold each time, so it takes time to set up, and moreover, molds corresponding to each type are required,
Therefore, there is a problem that labor and time are required and that the cost is considerably increased.

The present invention has been made in consideration of such circumstances, and an object thereof is a method of manufacturing a member with a bent portion which can easily form the bent portion without requiring a mold. Another object of the present invention is to provide an apparatus for manufacturing a member with a bent portion, which can accurately carry out the above method.

[0006]

In order to achieve the above object, the present invention proposes the following means. The invention according to claim 1 is a method for manufacturing a member with a bent portion, comprising a bent portion along a length direction at an end portion in the width direction of a metal plate, wherein a width dimension of the member with a bent portion is provided. While carrying the leading end portion of the strip-shaped metal plate, after forming a bent portion at the end portion of the metal plate, the metal plate is cut into a desired length to form a member with a bent portion. To do.

According to the manufacturing method of the present invention, the bent portion is formed at the end of the metal plate while the metal plate is being conveyed, and then the metal plate with the bent portion is cut into a predetermined length. Since the side plate is formed by doing so, the bent portion can be surely formed without using a mold.

According to a second aspect of the present invention, in the method of manufacturing a member with a bent portion according to the first aspect, when the bent portion is formed, the metal plate is conveyed while the end portion of the metal plate is moved. It is characterized in that the preliminary bending portion is formed by bending the preliminary bending portion at an angle smaller than the angle reaching the bending portion, and then the preliminary bending portion is further bent to a predetermined angle to form the bending portion.

According to the manufacturing method of the present invention, when the bent portion is formed, the bent portion is formed after the preliminary bent portion is formed at the end portion of the metal plate. Even when it is formed, the bent portion can be formed without damage, and the bent portion can be reliably formed.

According to a third aspect of the present invention, in the method for manufacturing a member with a bent portion according to the first or second aspect, when forming the preliminary bent portion, the metal plate is subjected to necessary primary processing. To do.

According to the manufacturing method of the present invention, when the metal plate is subjected to the necessary processing, it becomes unnecessary to perform any additional machining on the member with the bent portion after cutting the metal plate. Thus, the member with the bent portion can be formed well.

According to a fourth aspect of the present invention, there is provided an apparatus for manufacturing a member with a bent portion, wherein a bent portion along the length direction is provided at an end portion in the width direction of a strip-shaped metal plate, and the metal plate is a tip. A transport path for sequentially transporting the metal plate, and a bent portion forming means for bending the end portion of the front end portion of the metal plate along the length direction to form a bent portion when the metal plate is transported; And a cutting mechanism for cutting the metal plate having a bent portion into a desired length.

According to the manufacturing apparatus of the present invention, since the metal plate sequentially passes through the bent portion forming means and the cutting mechanism on the conveying path, the member with the bent portion is continuously formed. By transporting it, you can perform a series of processing,
The member with the bent portion can be formed reliably and satisfactorily.

According to a fifth aspect of the present invention, in the apparatus for manufacturing a member with a bent portion according to the fourth aspect, the bent portion forming means is an angle at which the end of the tip of the metal plate reaches the bent portion. The present invention is characterized by comprising a preliminary bending mechanism that bends at a smaller angle to form a preliminary bending portion, and a folding finishing mechanism that further bends the preliminary bending portion to a predetermined angle to form a folding portion.

According to the manufacturing apparatus of the present invention, since the metal plate is passed through both the pre-bending mechanism and the folding finishing mechanism, the pre-bending portion is formed, and then the folding portion is formed. Is formed at a large angle,
The bent portion can be formed without damage, and the bent portion can be reliably formed.

According to a sixth aspect of the present invention, in the apparatus for manufacturing a member with a folding portion according to the fourth or fifth aspect, the preliminary folding mechanism and the folding finishing mechanism are rotatably installed on a conveying path, and A forming roller on which the metal plate is placed, and a pressing roller for pressing the metal plate on the roller against the roller are provided.

According to the manufacturing method of the present invention, the bent portion is formed by the forming roller and the pressing roller, and the pressing roller presses the metal plate against the forming roller to form the bent portion. It can be reliably performed without requiring a mold.

According to a seventh aspect of the present invention, in the apparatus for manufacturing a member with a bent portion according to the fourth to sixth aspects, a forming mechanism is provided which, when forming the metal plate, performs a necessary primary process on the metal plate. Is characterized by.

According to the manufacturing apparatus of the present invention, when the working mechanism performs the necessary primary working on the metal plate, thereafter, after the metal plate is cut, any additional work is performed on the member with the bent portion. Since it is unnecessary, the member with the bent portion can be easily formed.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing the principle of the manufacturing method of the present invention, and FIGS. 2 to 6 show a manufacturing apparatus for carrying out the manufacturing method of the present invention. In this embodiment, a member with a bent portion manufactured by a manufacturing apparatus is applied to a side plate 6 provided in a heat exchanger such as a car air conditioner, and the side plates 6 are provided at both end portions in the width direction of the main body 6a. A bent portion 6b is provided (see FIG. 8).

In this manufacturing apparatus, a strip-shaped metal plate 10 which constitutes the entire width dimension of the side plate 6 is prepared in advance, and the metal plate 10 passes through the bent portion forming means 24 as shown in FIG. Then, the bent portion forming means 24 causes the bent portions 6b to extend from the tip portion 10a of the metal plate 10 to both ends thereof.
And the metal plate 10 having the bent portion 6b is formed,
After that, the side plate 6 shown in FIG. 8 is continuously formed by cutting it into a predetermined length.
The strip-shaped metal plate 10 is made of a plate body of aluminum or its alloy.

The above-mentioned manufacturing apparatus will be specifically described below.
As shown in FIG. 2, the manufacturing apparatus 20 includes a transport path 21 for the metal plate 10, a processing mechanism 23 installed on the transport path 21, a preliminary bending mechanism 25 as a bending portion forming means 24, and a bending finish. Mechanism 26, cutting mechanism 2
7 and are provided. A drum 22 around which the metal plate 10 is wound is installed on the upstream side of the transport path 21.
The tip portion 10a of the metal plate 10 set to 2 is sequentially fed from the tip portion to the downstream side by a pulling means (not shown).

The processing mechanism 23 comprises a press device, and when the metal plate 10 is fed in, as shown in FIG.
By providing the notch 11, the hole 12 and the like at the predetermined position, all the primary processing required for forming the side plate 6 is performed. In FIG. 3, the chain line 13 represents a cutting line, and the arrow 14 represents the transport direction of the metal plate 10 as in the case of FIG.

As shown in FIGS. 4 and 5, the pre-folding mechanism 25 of the folded portion forming means 24 is formed by a pair of two rotatably installed at both ends on the transport path 21 in a tilted state. The metal plate 10 has a roller 25a and a pair of pressing rollers 25b rotatably supported.
When the front end portion 10a of the metal plate 10 is fed onto the forming roller 25a, the pressing roller 25b descends toward the main body 6a as shown by the arrow in FIG. Preliminary bent portions 15 are formed at both ends in the direction by inclining along the forming roller 25a.

In this case, the forming roller 25a is inclined at an angle smaller than the angle of the bent portion 6b formed on the side plate 6 so that the preliminary bent portion 15 can be formed. The pressing roller 25b is separated from the pressing roller 25b by a distance between the pressing roller 25b and the main body 6a of the side plate 6, and the pressing roller 25b moves downward by a driving mechanism (not shown) to continuously press the fed metal plate 10. .

As shown in FIG. 6, the folding finishing mechanism 26 is supported by a pair of two forming rollers 26a rotatably mounted on the conveying path 21 about a vertical axis and a pair of forming rollers 26a rotatable about the vertical axis. A pair of pressing rollers 26
b. In this case, the forming roller 26a is installed at both ends on the conveying path 21 so as to be rotatable around a vertical axis.

The folding mechanism 25 is provided with a pressing roller 26b when the metal plate 10 is fed onto the forming roller 25.
Falls on the main body 6a of the metal plate 10 and presses both ends of the metal plate 10, whereby the pressing roller 26b and the forming roller 26a adjacent to the pressing roller 26b stand up the pre-folded portion at a right angle to the main body 6a. Therefore, the bent portion 6b is formed. Therefore, the rollers 25a and 25b of the pre-bending mechanism 25 and the rollers 2 of the folding finishing mechanism 26 are
6a and 26b are made of a hard metal body capable of bending the metal plate 10.

Although not shown in detail, the cutting mechanism 27 is composed of a cutter or the like, and cuts when the material 10 having the bent portion 6b is fed to a predetermined length each time.

Since the manufacturing apparatus 20 of this embodiment has the above-mentioned configuration, one embodiment of the manufacturing method will be described next in relation to its operation. Now, after the strip-shaped metal plate 10 is set on the drum 22, the leading end of the metal plate 10 is fed onto the transport path 21 by a pulling means (not shown), and when the leading end reaches the processing mechanism 23, the processing mechanism 23 The notch 11, the hole 12 and the like necessary for forming the side plate 6 at a predetermined position of the metal plate 10 are processed by 23, and then the metal plate 10 is preliminarily bent by the bending portion forming means 25 and finished by bending. The mechanism 26 and the cutting mechanism 27 are sequentially passed.

At this time, when the tip portion 10a of the metal plate 10 is fed onto the pair of forming rollers 25a of the pre-folding mechanism 25, the pressing roller 25b descends as shown by the arrow in FIG. By pressing the metal plate 10 against the forming roller 25a as shown in b), the pre-bent portions 15 are formed at both ends of the metal plate 10 by inclining obliquely upward, and the metal plate 10 is conveyed in that state. When continued, the pre-bent portion 15 is formed along the length direction. Therefore,
By feeding the metal plate 10 to the pre-bending mechanism 25, the pre-bending portions 15 that are inclined obliquely upward are formed in the longitudinal direction at both ends of the metal plate 10.

Then, when the metal plate 10 on which the pre-bending portion 15 is formed is subsequently fed onto the forming roller 26a of the folding and finishing mechanism 26, a pair of pressing rollers 26b.
6 as shown by the arrow in FIG. 6A, presses the metal plate 10 against the forming roller 26a as shown in FIG. 6B, and the pressing rollers 26b together with the forming rollers 26a adjacent to each other, Since the preliminary bending portion 15 is sandwiched, the preliminary bending portion 15 is bent in an upright state with respect to the main body 6a, and when the metal plate 10 is continuously conveyed in this state, the bending portion 6b moves in the longitudinal direction. It is formed. Therefore, when the metal plate 10 is fed into the folding finishing mechanism 26, the pre-bending portion 15 is erected at an angle of 90 degrees to form the bending portion 6b.

When the metal plate 10 on which the bent portion 6b is formed further reaches the cutting mechanism 27, the metal plate 10 is cut into a desired length there, so that the metal plate 10 has a predetermined length. The side plate 6 is formed. In this case, the cutting mechanism 27 repeats cutting every time the metal plate 10 is loaded in the length dimension of the side plate 6, so that the side plate 6 is continuously formed as shown in FIG. .

That is, according to this manufacturing method, the metal plate 10 is
While the bent portion 6b is formed on both ends of the metal plate 10 while the metal plate 10 is conveyed on the conveying path 21, the side plate 6 is cut by cutting the metal plate 10 with the bent portion 6b into a predetermined length. Since it is formed continuously, without using a mold,
The bent portion can be reliably formed. Therefore, when manufacturing side plates having different lengths, the cutting length may be adjusted so as to correspond to the lengths, and the pre-bending mechanism 25 and the bending finishing mechanism 26, which are the bent portion forming means 24, are not required. No need to change.

As a result, since it is only necessary to adjust the cutting length by the cutting mechanism 27, it is not necessary to set a mold according to the type of the side plate as in the conventional case, and the mold setup is performed. The time and labor required for the process can be omitted, and the cost can be reduced.

In the process of transporting the metal plate 10 onto the transport path 21, the metal plate 10 is subjected to primary processing, bending portion 6b formation processing, and side plate 6 length cutting processing. Therefore, the side plate 6 can be reliably formed during the series of transportation steps, and the side plate 6 can be manufactured well.

Moreover, when the bent portion 6b is formed, the metal plate 10 is preliminarily bent by the bending mechanism 25 and the bending finishing mechanism 2.
6 and the bent portion 6b is formed after the preliminary bent portion 15 is formed.
Even when forming at a large angle of 90 degrees with respect to a,
The bent portion 6b can be formed without damage,
The bent portion 6b can be reliably formed.

The manufacturing apparatus 20 of this embodiment is
A primary processing mechanism 23, a bent portion forming means 24, and a cutting mechanism 27 are installed on the transport path 21 of the metal plate 10,
Since the side plate 6 is continuously formed by sequentially passing the metal plate 10 through 23 to 26, a series of necessary processing such as the notch 11, bending processing, and cutting processing is performed while the metal plate 10 is being conveyed. The steps can be performed, and the side plate 6 can be formed reliably and satisfactorily.

Further, since the bent portion forming means 24 is provided with the pre-bending mechanism 25 and the bending finishing mechanism 26, both ends of the metal plate 10 are bent in two steps, and the bent portion 6b is formed by sequentially bending the both ends. Even if the object is metal,
Further, the bent portion 6b can be formed reliably and satisfactorily without using a mold.

In the illustrated embodiment, since the relatively soft metal plate 10 made of aluminum or its alloy is formed, an example in which the pre-bending mechanism 25 and the folding finishing mechanism 26 are configured in two stages has been shown. When forming a softer and thinner metal plate, it is possible to form the bent portions 6b at both ends of the metal plate at a stretch with only the bending and finishing mechanism 26, while when forming a hard metal plate, the preliminary bending mechanism is used. It is also possible to provide one or more sets of intermediate mechanisms between 25 and the folding finishing mechanism 26, and to gradually increase the angle of the pre-bending portion 15 step by step, and therefore, it is not limited to the illustrated embodiment.

Further, in the illustrated embodiment, since it is applied to the side plate 6 of the heat exchanger as a member with a bent portion,
I showed an example of applying primary processing such as drilling and notching,
The present invention is not limited to this, and the point is that bent portions may be formed at both ends in the width direction intersecting the length direction of the member with bent portions. Further, since it is applied to the side plate 6, an example of a U-shape in which the bent portions 6b are provided at both ends in the width direction of the main body 6a is shown, but it is formed in an L-shape provided at one end. It can also be applied to the member.

[0041]

As described above, according to the first aspect of the invention, the bent portion is formed at the end of the metal plate while the metal plate is being conveyed, and then the metal plate with the bent portion is formed. Since the side plate is formed by cutting into a predetermined length, not only the mold is unnecessary, but also the time and labor required for the mold setup can be omitted, and the cost can be reduced. The effect that can be achieved is obtained.

According to the second aspect of the present invention, when forming the bent portion, the preliminary bent portion is formed at the end of the metal plate, and then the bent portion is formed, and the bent portion is formed at a large angle. Even in this case, the bent portion can be formed without damage, and the bent portion can be reliably formed.

According to the third aspect of the present invention, it becomes unnecessary to perform any additional work on the member with the bent portion after cutting the metal plate, and the member with the bent portion can be formed well. The effect that can be obtained is obtained.

According to the invention of claim 4, the required series of forming can be performed on the member with the bent portion while the metal plate is being conveyed, and the member with the bent portion can be formed reliably and satisfactorily. The effect that can be obtained is obtained.

According to the invention of claim 5, even if the bent portion is at an angle which is vertical, it is possible to prevent the bent portion from being damaged, and the bent portion can be formed well. The effect that can be obtained is obtained.

According to the sixth aspect of the invention, since the pressing roller presses the metal plate against the forming roller, the bent portion can be reliably formed without the need for a mold.

According to the invention of claim 7, it is not necessary to perform any additional machining on the member with the bent portion after cutting the metal plate, and the member with the bent portion can be formed well. The effect that can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the principle of the manufacturing method of the present invention.

FIG. 2 is an overall schematic diagram showing a manufacturing apparatus for carrying out the manufacturing method of the present invention.

FIG. 3 is a plan view showing a state where a metal plate of a member with a bent portion is subjected to necessary primary processing by a processing die in a manufacturing apparatus.

FIG. 4 is an explanatory view showing a preliminary bending mechanism of a bent portion forming means.

FIG. 5 is a plan view showing the preliminary bending mechanism.

FIG. 6 is an explanatory view showing a bending finishing mechanism of a bent portion forming means.

FIG. 7 is an overall perspective view showing a heat exchanger having a side plate as a member with a bent portion.

FIG. 8 is a perspective view showing a side plate.

FIG. 9 is a conventional explanatory diagram when manufacturing a side plate.

[Explanation of symbols]

6 Side plate (member with bent part) 6b Bent section 10 Band-shaped metal plate 20 Manufacturing equipment 21 Transport route 23 Processing mechanism 24 Bent portion forming means 25 Pre-bending mechanism 25a forming roller 25b pressing roller 26 Bending and finishing mechanism 26a Forming roller 26b Pressing roller 27 cutting mechanism

Claims (7)

[Claims] 1. A method of manufacturing a member with a bent portion, comprising a bent portion along a length direction at an end portion of the metal plate in the width direction, wherein a strip-shaped metal plate having a width dimension of the member with the bent portion. While forming the bent portion at the end of the metal plate while transporting the tip of the metal plate, the metal plate is cut into a desired length to form a member with a bent portion. Manufacturing method of a member with a part. 2. The method for manufacturing a member with a bent portion according to claim 1, wherein an angle at which an end of the metal plate reaches the bent portion while the metal plate is being conveyed when the bent portion is formed. A method for manufacturing a member with a bent portion, comprising bending the bent portion to a smaller angle to form a preliminary bent portion, and then bending the preliminary bent portion further to a predetermined angle to form the bent portion. 3. The method for manufacturing a member with a bent portion according to claim 1, wherein the metal plate is subjected to a necessary primary working in forming the preliminary bent portion. Manufacturing method. 4. A manufacturing apparatus for a member with a bent portion, comprising a bent portion along the length direction provided at an end portion in the width direction of a strip-shaped metal plate, wherein the metal plate is sequentially conveyed from the front end portion. A path, a bent portion forming means for bending the end portion of the tip of the metal plate along the length direction to form a bent portion when the metal plate is being conveyed, and the bent portion. A device for manufacturing a member with a bent portion, comprising: a cutting mechanism for cutting a metal plate to a desired length. 5. The apparatus for manufacturing a member with a bent portion according to claim 4, wherein the bent portion forming means bends the end portion of the tip portion of the metal plate to an angle smaller than an angle reaching the bent portion. An apparatus for manufacturing a member with a bending portion, comprising: a preliminary bending mechanism for forming a preliminary bending portion; and a bending finishing mechanism for further bending the preliminary bending portion to a predetermined angle to form a bending portion. . 6. The manufacturing apparatus for a member with a bending portion according to claim 4, wherein the preliminary bending mechanism and the bending finishing mechanism are:
Bending comprising a forming roller that is rotatably installed on the conveying path and that mounts the metal plate, and a pressing roller that presses the metal plate on the roller against the roller. Equipment for manufacturing parts with parts. 7. The apparatus for manufacturing a member with a bent portion according to claim 4, further comprising a processing mechanism for performing necessary processing on the metal plate when forming the metal plate. Equipment for manufacturing attached parts.