JPS594228B2 - Radiator core brazing jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radiator core brazing jig, and the present invention relates to a radiator core brazing jig. It is an object of the present invention to provide a radiator core brazing jig configured so that linear expansion in a direction that generates contact pressure between fins is approximately equal to linear expansion of the brazing jig in the same direction.

When manufacturing a radiator core made of real aluminum by the brazing method, the linear expansion coefficient of the brazing jig in the furnace must be equal to or close to the linear expansion coefficient of the aluminum radiator core material in the furnace. desirable.

10 However, the linear expansion coefficient of aluminum is 0 to 600.
℃, 28×10 −610 c, which is extremely large.No alloy currently available for use as a jig has such a large coefficient of linear expansion.

15 Therefore, the radiator core is restrained by a jig with a smaller thermal expansion than the radiator core, which causes defects such as deformation, poor brazing, and dimensional defects when plating a radiator core with a complicated shape. There were many things that happened.

20 Conventionally, in order to eliminate this drawback, a spring method, a sacrificial fin method, and the like have been used as methods for clamping the radiator core, but neither method was fully satisfactory.

The present invention aims to eliminate the above-mentioned drawbacks, and one embodiment of the present invention will be described below with reference to the drawings.

1 is a radiator core brazing jig according to the present invention;
2 and 3 are side support plates 30 that contact and support the left and right side surfaces of the radiator core 10 fitted into the jig 1;
4' and 5, 5' are support members having an L-shaped cross section and made of the same material as the side support plates 2, 3 and fixed to the outer surfaces of the front and rear edges of the side support plates 2, 3, respectively.

Reference numeral 6 denotes a first bar for connecting the front parts of the side support plates 2 and 3 to each other, and both ends thereof are the upper end of the front support member 4 and the lower end of the support member 5, respectively. It is rotatably supported with a pin 8 at the bottom.

Reference numeral 7 denotes a second bar for connecting the front parts of the side support plates 2 and 3 to each other, and the two ends of the bar 7 are connected to the center of the first bar 6 so as to intersect with each other. ,Each,
At the upper end of the front support member 5 and the lower end of the support member 4,
It is rotatably supported with a pin 8.

Further, both the bars 6 and 7 are rotatably supported by a pin 9 at their central intersections.

Bars 6'' and 7' similar to the bars 6 and 7 are also provided on the rear surface of the brazing jig 1, respectively, and connect the rear portions of the side support plates 2 and 3 in the same manner.

As the bars 6, 6', 7, 7', the linear expansion coefficients thereof are similar to those of the supporting members 4, 4', 5, 5'. If you give one stroke, the support member 4
, 4', 5, 5', the linear expansion coefficient is 11.8X10
-6 (/℃) stainless steel (SUS24), and the bars 6, 7, 6', 7' have a linear expansion coefficient of 18
．． 7×l [6 (/°C) stainless steel μSus27) is used.

As shown in FIG. 2, 1/2 of the total length of the radiator core 10
A-250mm, the hole 6 at the upper end of the support member 4,
From the connection point with 7, horizontal line a including the intersection of 6 and 7
-a', the vertical distance D = 300 mm, the distance E from the intersection of pins 6 and 7, that is, the pin 9, to the end connection point of the support members 4 and 5 = 403.61 mm, and the width of the support members 4 and 5. If 1/2 is F=20mm, between these,
The relationship A=F "F1 F...1" is established.

If this relationship holds true even in a high-temperature furnace, deformation of the radiator core, etc. will be prevented. By the way, with the radiator core 10 assembled in the jig 1,
When fed into a furnace at 580°C, the dimensions A. D. E. F
changes as follows.

That is, the above-mentioned dimension A. D. Letting the dimensions corresponding to E and F be A', D', and E'F', respectively, the following will be obtained. A'=A(1+Ta)=250(1
+580x28x10-6)254.1mm...2D
'=D(1+Td)=300(1+580×11.8×
1Cf'6) 302.1mm...3E'=E(1+T
e) −403.61 (1+580×18.7X10−6
)408.0mm...4 F5=F(1+Td)=20(1+580><11.8
×10-6)=20.2mm・・・5h[]72−
F'=254.1mm...6 where a=linear expansion coefficient of aluminum radiator core 28X10-6 (/C)
d - Coefficient of linear expansion of support member 11.8 x 10-6 (/C)
e: linear expansion coefficient of 18.7×10 −6 (/(1)).

Equation 6 is the horizontal distance from the intersection of bars 6 and 7 of the jig 1 in the furnace, that is, the pin 9, to the support members 4 and 5. It matches the dimension A'.

This means that according to the present invention, the jig 1 has an x-shaped structure consisting of the support members 4, 5 and the bars 6, 7, and the materials of the bars 6, 7 are different from those of the support members 4, 5. This can only be achieved by setting the coefficient of linear expansion to be larger than that of the bar 5, and by making the slope of the bars 6 and 7 gradually become smaller as they elongate.

In other words, if the bars 6 and 7 are long and their slope is small,
The horizontal component of the elongation eventually becomes equal to the horizontal elongation of the radiator core 10.

Thus, according to the present invention, by appropriately selecting the material, dimensions, and coefficient of linear expansion of each component of the jig, it is possible to almost perfectly match the linear expansion in the horizontal direction that occurs when the core and the jig are heated. It is possible to do so.

However, it is not necessary to completely match type 6 with type 2; for example, between the cooling fins 11 and the water pipes 12,
If you want to obtain a predetermined contact pressure in the furnace, you can make Equation 6 a slightly smaller value than Equation 2 by using materials with an appropriate coefficient of linear expansion for the support members and bars. The desired contact pressure can be obtained.

In any case, the coefficient of linear expansion of the bar must be larger than that of the support member.

As is clear from the above description, the radiator core brazing jig of the present invention uses a member having a coefficient of linear expansion considerably smaller than that of the radiator core. Since the construction is such that the linear expansion in the direction that generates contact pressure between the cooling fins is almost the same as the linear expansion of the brazing jig, the radiator core fins and water tubes will not be deformed during the furnace. Furthermore, problems such as poor bonding between the fins and the tubes are eliminated. In the embodiment, the central intersections of the X-shaped crossbars 6, 7, and 6', 7' are rotatably supported by pins 9; This is to stabilize the holding of each member that would otherwise fall apart when not in use, and may be omitted.

[Brief explanation of drawings]

FIG. 1 is a front perspective view showing an embodiment of the radiator core brazing jig according to the present invention with a radiator core installed, and FIG. 2 is for explaining the state of linear expansion of the jig shown in FIG. 1. FIG. 1...Radiator core brazing jig, 2,
3...Side support plate, 4,4'5,5''...
・・Supporting member, 6, 6′, 7, 7′・・・・Bar one
8, 9...Pin, 10...Radiator core, 11...Cooling fin, 12...
Water pipe.

Claims (1)

[Claims] 1 Pins are attached to the left and right side support members that support the left and right side surfaces of the radiator core made of aluminum, intersecting in an x-shape, and having both ends at the upper and lower ends of the front and rear edges of the side support members, respectively. The structure includes two sets of x-shaped cross bars, front and rear, which are rotatably supported with a radiator core. By making the material larger than the coefficient of linear expansion of the member, the inclination of the bar becomes gradually smaller as it expands during heating, and the horizontal component of the elongation becomes larger than that of the radiator core. A radiator core brazing jig characterized by making the elongation in the horizontal direction as equal as possible.