JPH11237197A - Radiator core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent defective brazing of radiator core while enhancing productivity thereof. SOLUTION: Supporting members 16 are arranged on the opposite sides of a radiator core body 11 comprising tubes 12, tins 13 and core plates 14. An inflated section 17 having substantially semicircular cross-section is formed on the supporting member 16 in order to absorb stress occurring in the longitudinal direction. The supporting member 16 comprises a supporting part 16a and a pair of turn up parts 16b each of which is provided with one or more than one cut 16c and the inflated section 17 for absorbing stress is formed at the supporting part 16a between the cuts 16c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator core having support members on both sides.

[0002]

2. Description of the Related Art A vehicle is provided with a radiator to prevent the engine from overheating. In this type of radiator, core plates are fixed to both ends of a large number of tubes having fins fixed to the outer peripheral surface by brazing,
An inlet tank and an outlet tank are provided at the cooling water inflow portion and the outflow portion of the radiator core to which the core plate is fixed as described above. A radiator hose is connected to the inlet tank and the outlet tank, and the cooling water heated by the engine flows into the inlet tank through the hose and moves downward or sideways through the tube of the radiator core from the inlet tank. Cooled. The cooling water cooled by the radiator core then returns to the engine from the outlet tank via a hose, and cools the engine again.

On the other hand, when aluminum is used for tubes and fins constituting a radiator core, the brazing is performed by disposing support members on both sides of a core body composed of tubes, fins and a core plate. It is known that the main body is fastened together with the support member by a fastening material such as a wire or a wire and brazed. In this manner, the core body is brazed by tightening with the fastening material, thereby preventing brazing failure due to thermal expansion of each member due to heat at the time of brazing.

[0004]

However, since the support member is fixed to the core body and the core plate by brazing, if the radiator is used while the support member is fixed to the core body and the core plate, the support member and the core are fixed. Body,
In particular, due to the difference in the coefficient of thermal expansion between the tube and the tube, there is a problem that stress is concentrated on the brazing portion of the radiator core in actual use. That is, when the high-temperature cooling water flows through the tube of the core body, the temperature of the tube itself rises, and the tube rises due to the temperature rise and extends in the longitudinal direction. This elongation of the tube increases the dimension between the core plates, but the elongation of the support member is different from the elongation of the tube because the temperature rise of the support member is different from the temperature increase of the tube. For this reason, there is a problem that stress concentrates on a brazing point of the core body, particularly a brazing point of the tube and the core plate. In order to solve this problem, a part of the support member brazed together with the core body is brazed and cut to prevent stress from being concentrated at the brazed portion. There is also a problem that it is difficult and reduces the productivity of the radiator core. An object of the present invention is to provide a radiator core that can prevent poor radiator core brazing and can improve the productivity of the radiator core.

[0005]

The invention according to claim 1 is
As shown in FIG. 1, this is an improvement of a radiator core in which support members 16 are disposed on both sides of a core body 11 including a tube 12, fins 13, and a core plate 14. The characteristic configuration is that the supporting member 16 is formed with a stress absorbing bulging portion 17 whose cross section for absorbing the stress generated in the longitudinal direction bulges in a substantially semicircular shape. If the radiator is used with the support member fixed to the core body, the temperature of the tube 12 itself rises when the cooling water heated by the engine flows through the tube 12, and the tube 12 thermally expands due to this temperature rise. Extends in the longitudinal direction. This extension of the tube 12 increases the dimension between the core plates 14,
With the increase in the size, the supporting member 16 having a different temperature rise is pulled and generates a tensile stress in the longitudinal direction. Support member 1
The swelling portion 17 for stress absorption formed in the support member 16
Is absorbed by the deformation of the stress-absorbing bulging portion 17 to allow the dimension between the core plates 14 to increase. By allowing an increase in the size between the core plates 14, stress is prevented from being concentrated on the brazing point of the core body 11, particularly the brazing point of the tube 12 and the core plate 14.

According to a second aspect of the present invention, in the first aspect of the present invention, the support member 16 comprises a support portion 16a and a support portion 16a.
a pair of folded portions 16b formed on both sides in the longitudinal direction of FIG.
And each of the pair of folded portions 16b has 1 or 2
The above notch 16c is formed, and the stress absorbing bulging portion 17 is formed.
Is a radiator core formed on the support portion 16a between the notches 16c. The folded portion 16b reinforces the support portion 16a to prevent the deformation of the support portion 16a at the time of brazing,
The swelling portion 17 for stress absorption is a support member 1 after brazing.
6 absorbs deformation in the longitudinal direction. The notch 16c prevents the folded portion 16b from becoming a resistance to the deformation when the stress absorbing bulging portion 12b is deformed.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, a radiator core 10 according to the present embodiment is of a so-called downflow type in which cooling water moves downward inside a tube 12, and is made of a tube 12 made of aluminum, a fin 13 and a core. It has a core body 11 composed of a plate 14. The tube 12 is formed from a hoop of aluminum strip by a tube rolling device, and the cross-sectional shape of the tube 12 is formed in an elliptical shape. Fin 13
Is formed in a corrugated form from an aluminum hoop by a gear-type roll. Although not shown, a plurality of louvers are simultaneously formed as necessary. The tubes 12 and the fins 13 are arranged alternately, and are joined together with the core plate 14 attached to both ends of the tube 12 so that the core body 1
1 is formed.

[0008] The tube 12, the fins 13 and the core plate 14 are joined by brazing. At this time, supporting members 16 are provided on both sides of the core body 11. The support member 16 has a support portion 16a that comes into contact with the tube 12 or the fin 13, and a pair of folded portions 16b for reinforcing the support portion 16a and preventing deformation of the support portion 16a during brazing. A pair of folded portions 16
"b" is formed on both sides in the longitudinal direction of the support portion 16a. A notch 16 is formed at the center of the pair of folded portions 16b.
c are formed so as to be opposed to each other at one position, and the support portion 16a between the notches 16c has a swelling portion 17 for absorbing the stress.
Is formed. As shown in FIG.
7 is formed by expanding the support portion 16a in a substantially semicircular cross section, and generates a tensile or compressive stress generated in the longitudinal direction of the support member 16 as shown by a solid line arrow. It is configured to deform and absorb as shown by the two-dot chain line.

The provision of the support member 16 having the above-described structure on the core body 11 is performed by attaching the core body 11 to the support member 16.
At the same time, it is performed by fastening with a fastening material such as a wire or a wire (not shown). In this state, the core body 11 is left in a brazing furnace, and the tubes 12, the fins 13, and the core plate 14 are brazed to each other.
As shown in FIG.
Then, the support portions 16a are simultaneously brazed to the fins 13, respectively. Although not shown, the edge of the folded portion 16b of the core plate 16 is similarly brazed to the core plate 14. After brazing, the fastening member (not shown) fastened at the time of brazing is removed, but the supporting member brazed together with the core body 11 is used as the radiator core 10 in a state of being fixed to the core body 11.

The radiator core 10 constructed as described above
In the upper and lower portions of the apparatus, an inlet tank and an outlet tank (not shown) are provided for actual use.
One end of a radiator hose (not shown) is connected to the inlet tank and the outlet tank, and the other end of each of the radiator hoses is connected to an outlet and an inlet of a cooling passage of the engine. The cooling water heated by the engine flows into the inlet tank via the hose, moves downward from the inlet tank through the tube 12, and the heat of the cooling water is radiated outside through the fins 13 joined to the tube 12. The cooling water is cooled. After cooling, the cooling water reaches the outlet tank from the tube 12, returns to the engine via the hose, and cools the engine again.

In the radiator core configured as described above, the temperature of the tube 12 itself rises when the cooling water heated by the engine flows through the tube 12, and the tube 12 thermally expands due to the rise in temperature. 2 extends in the longitudinal direction as indicated by the solid arrow. This extension of the tube 12 increases the dimension C between the core plates 14 shown in FIG. On the other hand, the temperature rise value of the support member 16 is lower than the temperature rise value of the tube 12 through which the cooling water flows, and the elongation rate due to the thermal expansion of the tube 12 and the support member 16 immediately after starting the engine is different. . here,
Since both ends of the support member 16 are brazed to the core plate 14, the support member 16 is pulled with an increase in the dimension between the core plates 14, and a tensile stress is generated in the longitudinal direction. The stress absorbing bulging portion 17 formed on the support member 16 absorbs thermal stress generated in the longitudinal direction of the support member 16 by deforming as shown by a two-dot chain line in FIG. Allow C (FIG. 1) to increase. Since the increase in the dimension between the core plates 14 is allowed in this manner, stress is prevented from being concentrated on the brazing point of the core body 11, particularly the brazing point of the tube 12 and the core plate 14. The notch 16c formed in the folded portion 16b prevents the folded portion 16b from becoming a resistance to the deformation when the stress absorbing bulging portion 12b is deformed.

In the embodiment described above, the support 1
Although the supporting member having the folded portions 16b formed on both sides in the longitudinal direction of 6a has been described, the supporting member may be a flat plate having no folded portions as long as deformation at the time of brazing can be prevented. Further, in the above-described embodiment, the description has been made using the core body 11 composed of the tube 12 made of aluminum, the fins 13, and the core plate 14, but the core body is made of another metal material such as copper. Is also good.

[0013]

As described above, according to the present invention, the supporting member has a stress absorbing bulging portion whose cross section for absorbing the stress generated in the longitudinal direction bulges in a substantially semicircular shape. The stress-absorbing bulging portion absorbs the stress generated in the support member due to the difference in thermal expansion, and allows the dimension between core plates to increase. For this reason, it is possible to prevent stress from being concentrated on the brazing portion of the core body, particularly the brazing portion between the tube and the core plate, without cutting the support member after brazing as in the related art. it can. As a result, it is possible to prevent the radiator core from being poorly brazed, and to omit the conventional cutting step, thereby improving the productivity of the radiator core.

In the case where the supporting member has a supporting portion and a pair of folded portions for reinforcing the supporting portion and preventing deformation of the supporting portion at the time of brazing, one pair of the folded portions is provided.
Or, by forming two or more notches and forming a stress absorbing bulge in the support between the notches, it is possible to prevent the folded part from becoming a resistance when the stress absorbing bulge is deformed. can do. As a result, the stress generated in the longitudinal direction of the support member can be effectively absorbed by the stress absorbing bulging portion without impairing the essential function of the support member.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a radiator core according to the present invention.

FIG. 2 is a cross-sectional view of FIG.
FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1 showing a stress absorbing bulging portion of the support member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Radiator core 11 Core main body 12 Tube 13 Fin 14 Core plate 16 Support member 16a Support part 16b Folding part 16c Notch 17 Swelling part for stress absorption

Claims (2)

[Claims] 1. Support members are provided on both sides of a core body (11) comprising a tube (12), fins (13) and a core plate (14).
In the radiator core provided with (16), the supporting member (16) is formed with a stress absorbing bulging portion (17) in which a cross section for absorbing a stress generated in a longitudinal direction thereof bulges in a substantially semicircular shape. A radiator core characterized by the following. 2. A support member (16) and a pair of folded portions formed on both sides in the longitudinal direction of the support portion (16a) and the support portion (16a).
(16b), one or more notches (16c) are formed in each of the pair of folded portions (16b), and the stress absorbing bulging portion (17) is formed in the notch (16c). 2. The radiator core according to claim 1, wherein the radiator core is formed on the supporting portion (16a) therebetween.