KR20130101745A - Method for manufacturing the radiator - Google Patents

Abstract

PURPOSE: A radiator manufacturing method is provided to input a radiator assembly including a radiator core in which upper and lower tanks are joined into a brazing furnace and to heat the radiator assembly, thereby welding the upper and lower tanks and the headers. CONSTITUTION: A radiator manufacturing method includes the following steps of: forming a radiator core by assembling a plurality of air units and a plurality of cooling units to be mutually laminated (S110); joining upper and lower tanks to the radiator core respectively (S120); and welding the radiator core and the upper and lower tanks by inputting a radiator assembly including the radiator core in which the upper and lower tanks are joined into a brazing furnace and heating the radiator assembly (140). [Reference numerals] (S110) Assemble a radiator core; (S120) Combine upper and lower tanks with the radiator core; (S130) Combine pipes; (S140) Heat the pipes in a brazing furnace

Description

Radiator manufacturing method {METHOD FOR MANUFACTURING THE RADIATOR}

The present invention relates to a method for manufacturing a radiator for cooling a coolant provided for driving a vehicle, and more particularly, to manufacturing a radiator capable of performing bonding between a radiator core and an upper and lower tanks at a low cost and in a short time. It is about a method.

Generally, in driving an engine such as a ship or an automobile, the temperature of the combustion gas in the combustion chamber reaches 2000 ° C or more, and a considerable amount of this temperature is conducted to the cylinder, the cylinder head, the piston, and the valve.

Excessively high temperatures in these parts reduce the strength of the part material, resulting in failure or shortening of life, and poor combustion, leading to knocking and premature ignition, resulting in lower engine output.

In addition, in the incomplete cooling state, failures such as abnormal lubrication and seizure due to deterioration of the lubrication function such as breakage of the oil film on the cylinder wall and deterioration of the cooling water can occur. On the contrary, since excessive cooling causes a large amount of heat lost by cooling, the engine thermal efficiency is lowered and fuel consumption is increased. Therefore, the engine temperature must be maintained. The radiator is a device that cools the temperature of the heated cooling water to an appropriate level through the engine.

The radiator includes an upper tank having an inlet formed with an inlet for cooling water, a lower tank having a drainage port, and a radiator core for cooling the coolant introduced from the upper tank by external air flowing orthogonal to the cooling water.

On the other hand, the conventional radiator first assembled each component of the radiator core and completed through brazing welding, and then joined the upper and lower tanks to the radiator cores, and joined pipes for supplying and discharging cooling water to the upper and lower tanks. It is manufactured by working individually.

At this time, the bonding between each tank and the radiator and the pipe to each tank in the above process is usually made through TIG (Tungsten Inert Gas) welding. Here, TIG welding shields the arc and the molten part with an inert gas such as argon (Ar) or helium (He) in a touch using a tungsten rod as an electrode to block the ingress of oxygen and nitrogen in the atmosphere, An arc is generated between them to melt and weld the base metal and filler metal with the heat.

Since the TIG welding is easy to adjust the welding heat input has a very good advantage for thin plate welding, it is mainly used for joining the upper and lower tanks to the radiator core.

However, joining the radiator core and the upper and lower tanks through TIG welding has a disadvantage that the TIG welding is relatively slow in welding speed and costly as compared with other welding methods.

Therefore, the present invention is to solve the above problems, an object of the present invention is to provide a manufacturing method that can produce a radiator in a short time while reducing the cost.

Upper tank of the present invention to achieve the above object; A lower tank spaced apart from the upper tank; A pair of headers disposed between the upper and lower tanks, and a radiator core configured to be laminated to each other so that external air and cooling water flows perpendicularly between each other between the pair of headers. silver,

(a) a plurality of cooling units including a pair of tube plates, an oil fin disposed between the pair of tube plays, and a tube bar disposed before and after the oil fin, respectively;

A plurality of air units disposed on both sides of each of the cooling units and including air fins and head bars disposed above and below the air fins;

To assemble the radiator core,

(b) respectively combining the upper and lower tanks to the radiator core;

(c) joining the upper and lower tanks and the radiator core by heating the radiator assembly including the radiator core to which the upper and lower tanks are coupled to a brazing furnace and heating the same.

The upper and lower tanks are formed with a first extension portion whose end is bent outward and a second extension portion extending from the first extension portion to the radiator core side,

In the step (b), the first extension part is seated at the upper end or the lower end of the head bar and the tube bar of the radiator core, and the second extension part is provided to surround the front and rear surfaces of the head bar and the tube bar of the radiator core. It features.

In the step (c), the upper and lower tanks and the head bar and the tube bar are at least joined to each other, and the joining surface is made of clad aluminum, and the joining surface is melted in the process of heating the radiator assembly into the brazing furnace, thereby filling the fillet. Characterized in that they are joined together so that they can be produced.

After the step (b) further comprises coupling a pipe for the inlet and drainage of the cooling water to the upper and lower tanks,

The pipe coupled to the upper and lower tanks is characterized in that the bonding in the process (c).

As described above, the radiator manufacturing method of the present invention has the effect of reducing the time and cost compared to the conventional TIG welding by using brazing welding when the radiator core and the upper and lower tanks are joined.

1 is a perspective view showing a radiator of the present invention.
2 is a front view of the radiator of the present invention.
3 is an enlarged view of a portion A in Fig.
Figure 4 is a perspective view of the air fin of the radiator core of the present invention.
5 is a plan view showing a radiator core of the present invention.
6 is an enlarged view of a portion B in Fig.
7 is a perspective view showing a cooling fin of the radiator core of the present invention.
8 is a cross-sectional view taken along the line CC ′ of FIG. 1 to explain the coupling structure of the radiator core and each tank in the radiator of the present invention.
9 is a flowchart illustrating a method of manufacturing a radiator of the present invention.
10 is an enlarged cross-sectional view illustrating a coupling state of the radiator core and the upper and lower tanks in the present invention.

Hereinafter, the structure of the radiator of the present invention will be described in detail.

Referring to FIG. 1, the radiator of the present invention includes upper and lower tanks 10 and 20, and a radiator core 30 joined to each tank 10 and 20 between each tank 10 and 20. .

First, the upper tank 10 is formed with an inlet through which the coolant used to heat the engine of the vehicle is introduced. In addition, the lower tank 20 is formed with a drain port through which the coolant flowing through the upper tank 10 and passing through the radiator core 30 is discharged.

The radiator core 30 includes an air portion and a coolant portion configured to allow air and coolant to flow perpendicularly to each other, as shown in FIG. 2. Reference numeral 35 is a core guard disposed on both sides of the radiator core to protect.

As shown in FIGS. 2 to 4, the air unit includes a plurality of air units 40. Each air unit 40 includes an air pin 41 and a head bar 43 disposed above and below the air pin 41.

As shown in the drawing, the air fins 41 are disposed between the tube plates 51 of the cooling water part to be described later and joined. The air fins 41 are formed in a corrugated shape of a metal sheet, and the unit pins 41a of the mountain type are continuously connected in a second direction perpendicular to the flow direction (first direction) of air. do.

A plurality of air passage holes 41b which are expanded are formed in the mountain unit pin 41a, and the plurality of air passage holes 41b are spaced apart from each other in the air flow direction (first direction).

At this time, the air passage hole 41b is preferably formed such that the opening is directed toward one surface (second negative direction) of the mountain-type unit pin 41a and toward the other surface (second bidirectional). As described above, when the air passing holes 41b are formed on both sides of the unit pins 41a, the air flowing into the air pins 41 passes through the air passing holes 41b, and thus the air passing holes 41b. The air passing through it drops its flow rate somewhat.

This is to increase the time the air stays in the air fin 41 so as to allow sufficient heat transfer between the air and the coolant. In addition, the air pin 41 contributes to the formation of the vortex in the air in the air pin (33). In the heat transfer of the fluid, if the flowing fluid forms a vortex, the heat transfer efficiency between the fluids is much improved. Therefore, the heat transfer efficiency of the air fin of the present invention is dramatically increased.

The cooling water unit includes a plurality of cooling units 50 as shown in FIGS. 5 to 7, and air units 40 are disposed at both sides of each cooling unit 50. That is, the air unit 40 is disposed on the left side and the right side of any one of the cooling units 50 so that the air and the coolant can flow perpendicularly to each other.

The cooling unit 50 is provided with a pair of tube plates 51, cooling fins 53 disposed between the pair of tube plates 51, and the front and rear of the cooling fins 53, respectively. It includes a tube bar (55).

The air plate 41 and the head bar 43 of each air unit 40 are bonded to the tube plate 51 as shown, and the cooling pin 53 and the tube bar 55 of each cooling unit 50 are joined. ) Is also joined. That is, since the air fins 41 and the cooling fins 53 are respectively joined to the tube plate 51, the temperature of the coolant flowing in the orthogonal flow is reduced by making thermal contact with the cold air. Therefore, in order to facilitate heat transfer from the high temperature cooling water to the air that is the cooling medium, the air fins 41, the cooling fins 53, and the tube plate 51 may be formed of a material having excellent thermal conductivity.

The cooling fins 53 are formed in such a way that the convex unit pins 53a and 53b of the waveforms are alternately arranged in a first direction perpendicular to the flow direction (second direction) of the cooling water. In addition, a coolant passage hole 53c is formed between the unit pins 53a and 53b which are staggered with each other so that the coolant can pass through the thermal contact.

The cross-sectional shape of the unit pins 53a and 53b may be selectively used in arcs, squares and trapezoidal shapes, and the like, which is advantageous in that the rectangular or trapezoidal shape may increase the thermal contact area.

In addition, by adopting the structure of the cooling fins 53 of the present invention, it is possible to easily form the vortex of the cooling water, thereby improving heat transfer efficiency. In addition, by changing the degree of staggering of the unit fins (53a, 53b) can change the size of the cooling water through hole (53c) it is easy to change the structure of the cooling fins according to the surrounding environment.

As described above, the tube bar 55 is disposed at the front and the rear of the cooling fin 53 to prevent the cooling water introduced through the upper tank 10 from leaking out in the process of passing through the cooling unit 50. .

On the other hand, in the radiator of the present invention look at the coupling structure of the radiator core and each tank as follows.

Referring to FIG. 8, the coupling structure of the radiator core 30 and each of the tanks 10 and 20 of the present invention includes edges of the upper and lower portions of the radiator core 30 in which the respective tanks 10 and 20 are assembled. After bonding so as to surround the joint is made by joining the brazing welding.

To this end, the lower end of the upper tank 10 and the upper end of the lower tank 20 are provided in a shape extending to the radiator core 30 side again after being bent outward as shown.

In other words, the upper and lower tanks 10 and 20 are bent outwardly so that the upper end or the lower end of the radiator core 30, specifically, the upper end of the head bar 43, the tube bar 55 and the core guard 35 or The first extension part 15 seated at the lower end and the edge of the radiator core 30 extending from the first extension part 15, specifically, the front and rear and cores of the head bar 43 and the tube bar 55. It includes a second extension portion 16 surrounding a portion of the outer surface of the guard (35). The upper and lower tanks 10 and 20 having end portions of the above shapes may be manufactured by a method such as a press.

The upper and lower tanks 10 and 20 are made of a clad aluminum alloy so that the radiator core 30 and the radiator core 30 can be joined to each other by brazing welding. In particular, the upper and lower tanks (10, 20) is preferably made of a material of the clad aluminum alloy inner surface directly in contact with the radiator core (head bar, tube bar and core guard).

In addition, at least contact surfaces of the head bar 43, the tube bar 55, and the core guard 35 of the radiator core 30 in contact with the upper and lower tanks 10 and 20 are made of a clad aluminum alloy. desirable.

Hereinafter, with reference to the drawings will be described in detail a manufacturing method of the radiator of the present invention.

9, in order to manufacture the radiator of the present invention, the radiator core 30 is first assembled (S110). At this time, the radiator core 30 has a structure in which a plurality of air units 40 through which the outside air flows and a plurality of cooling units 50 through which the coolant flows are stacked left and right so that the outside air and the cooling water flow orthogonal to each other. Prepared.

After the radiator core 30 is assembled, the upper and lower tanks 10 and 20 are coupled to the upper and lower edges of the radiator core 30 (S120). At this time, the process of coupling the upper and lower tanks 10 and 20 to the radiator core 30, the first extension portion 15 of the upper and lower tanks 10 and 20, the head bar 43, the tube bar ( 55), the core guard 35 is seated on the upper end or the lower end, and the second extension 16 of the upper and lower tanks 10 and 20, the head bar 43, the front and rear of the tube bar 55, The outer surface of the core guard 35 is to be wrapped.

Next, after the upper and lower tanks 10 and 20 are coupled to the radiator core 30, the upper and lower tanks 10 and 20 are coupled to the pipes such as the inflow pipe and the drain pipe, thereby coupling to each component of the radiator. Complete (S130).

After completing the coupling of each component of the radiator, the completed radiator is heated in a brazing furnace (not shown). When the thus completed radiator is put into a brazing furnace and heated, the components of the radiator core 30 are joined, and the joining portions of the radiator core 30 and the upper and lower tanks 10 and 20 are joined to each other, , Pipes are coupled to the lower tank (10, 20) (S140).

In particular, in the present invention, as the components of the upper and lower tanks 10 and 20 and the radiator core 30 in contact therewith are made of a clad aluminum alloy as described above, the brazing furnace as shown in FIG. When put into the heating, the surfaces are partially joined to each other so that the fillets 18 can form.

Therefore, in the present invention, unlike the prior art for joining the upper and lower tanks by TIG welding to the radiator core, the upper and lower tanks are joined to the radiator core and put in a brazing furnace to reduce the time and cost required for the mutual joining. Can be.

In particular, after combining the components of the radiator core to complete the manufacture through brazing welding, the upper and lower tanks are joined to the radiator cores by TIG welding, and the pipes are then joined to the upper and lower tanks again by TIG welding. Unlike, in the present invention, each component of the radiator core is combined, the upper and lower tanks are coupled to the radiator core, and the completed radiator assembly is put into the brazing furnace by combining pipes to the upper and lower tanks. By joining each component of the radiator through heating, the individual joining of each component of the radiator reduces the time required and at the same time prevents cost increases.

10: upper tank 15: first extension part
16: second extension 18: fillet
20: lower tank 30: radiator core
40: air unit 41: air pin
43: head bar 50: cooling unit
51 tube plate 53 cooling fins
55: tube bar

Claims (3)

Upper tank;
A lower tank spaced apart from the upper tank;
In the radiator manufacturing method comprising a; radiator core disposed between the upper and lower tanks, the radiator core configured to allow the coolant and the external air to flow through the upper tank orthogonal to each other;
(a) a plurality of cooling units including a pair of tube plates, oil fins disposed between the pair of tube plays, and tube bars disposed before and after the oil fins, respectively;
A plurality of air units disposed on both sides of each of the cooling units and including air fins and head bars disposed above and below the air fins;
To assemble the radiator core,
(b) respectively combining the upper and lower tanks to the radiator core;
(c) joining the upper and lower tanks and the radiator core by heating the radiator assembly including the radiator core to which the upper and lower tanks are coupled to a brazing furnace and heating the same.
The upper and lower tanks are formed with a first extension portion whose end is bent outward and a second extension portion extending from the first extension portion to the radiator core side,
In the step (b), the first extension part is seated at the upper end or the lower end of the head bar and the tube bar of the radiator core, and the second extension part is provided to surround the front and rear surfaces of the head bar and the tube bar of the radiator core. Radiator manufacturing method characterized in that. The method of claim 1,
In the step (c), the upper and lower tanks and the head bar and the tube bar are at least joined to each other, and the joining surface is made of clad aluminum, and the joining surface is melted in the process of heating the radiator assembly into the brazing furnace, thereby filling the fillet. Radiator manufacturing method characterized in that they are bonded to each other to be produced. The method of claim 2,
After the step (b) further comprises coupling a pipe for the inlet and drainage of the cooling water to the upper and lower tanks,
The pipe coupled to the upper and lower tanks is a radiator manufacturing method, characterized in that joined in the process (c).

Images