Method for manufacturing porous high-frequency welded aluminum pipe for full-aluminum brazed heat sink water tank and aluminum pipe

Abstract

The present application relates to a kind of full-aluminum brazing heat-dissipating water tank's porous high-frequency welding aluminum pipe manufacturing method, comprising the following steps: (1) after guiding, the aluminum strip is pressed, and after the aluminum strip is pressed, the aluminum strip fin;(2) on the upper and lower sides of the aluminum strip fin, roll coating flux is carried out;(3) after the aluminum strip fin is compounded with welding pipe aluminum strip, roll pressing is carried out, until gradually roll pressed into round aluminum pipe with weld, and the weld is arranged along the length direction of round aluminum pipe;(4) round aluminum pipe is guided and enters high-frequency welding area;(5) round aluminum pipe entering high-frequency welding area passes through direct current high-frequency induction coil;The present application has the advantages that: it realizes that the inside of full-aluminum radiator water tank is one pipe and porous, and the water flow in water tank, pressure bearing is dispersed.It not only solves the deficiency on heat dissipation, but also improves the anticorrosion performance, pressure resistance and anti-seismic problem of water tank, saves production cost, and realizes the goal of increasing efficiency and reducing carbon.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of full aluminum brazing heat dissipation water tank's porous high-frequency welding aluminum pipe manufacturing method, belong to aluminum pipe preparation field. BACKGROUND

[0002] At present, large horsepower engine radiator water tank is all made of various caliber extruded porous aluminum flat tube and high-frequency welded single-hole aluminum flat tube by brazing. The equipment using large horsepower engine (large car, agricultural machinery, engineering machinery, generator set, etc.) generally has poor working environment, large vibration, large load, strong instantaneous output burst force and other characteristics, which requires strictness of water tank as a whole in heat dissipation, vibration, corrosion resistance and structure.

[0003] Since the extruded aluminum pipe is generally extruded and drawn in semi-molten state under heating (540°-570°), the extrusion die and drawing die are greatly worn during the production of porous caliber aluminum pipe. If the extrusion force, die design and extrusion speed are not properly controlled, the yield strength, tensile strength and elongation of aluminum are easily caused to be uneven, with bubbles and scratches. Due to the high-temperature extrusion characteristics, it is impossible to add a protective layer to the surface of the aluminum pipe during the extrusion process, which brings great production cost pressure and risk factors to the radiator water tank enterprises, and the product quality is also relatively fragile and unstable. The high-frequency induction magnetic property of aluminum material is poorer than that of other materials, and the temperature and speed technology during high-frequency welding of aluminum pipe production process requires high control. At present, the heat generated during the high-frequency welding process of aluminum pipe is cooled by direct spraying of cooling water. Therefore, the material and physical properties of the aluminum pipe weld edge change in the process of instantaneous heat and cold change, and the yield strength, tensile strength and elongation of aluminum are affected. SUMMARY

[0004] In order to overcome the defects of the prior art, the present application provides a kind of full aluminum brazing heat dissipation water tank's porous high-frequency welding aluminum pipe manufacturing method, and the technical scheme of the present application is:

[0005] A kind of full aluminum brazing heat dissipation water tank's porous high-frequency welding aluminum pipe manufacturing method, comprising the following steps:

[0006] (1) the aluminum strip is pressed after being guided, and the aluminum strip fin is obtained after the aluminum strip is pressed;

[0007] (2) roll-coat flux on the upper and lower sides of the aluminum strip fin;

[0008] (3) roll the aluminum strip fin and the welding pipe aluminum strip after compounding, until gradually roll into a round aluminum pipe with weld, and the weld is arranged along the length direction of the round aluminum pipe;

[0009] (4) the round aluminum pipe is guided into a high-frequency welding area;

[0010] (5) The circular aluminum pipe entering the high-frequency welding area passes through a direct current high-frequency induction coil, and the weld of the circular aluminum pipe is instantaneously melted by the magnetic field effect generated during the energization of the direct current high-frequency induction coil;

[0011] (6) The circular aluminum pipe enters a ceramic extrusion roller mold with internal circulating cooling water to perform instant extrusion, so that the welds are melted together, and the circular aluminum pipe forms a seamless aluminum pipe; after the circular aluminum pipe instantaneously passes through the ceramic extrusion roller mold, the weld temperature is instantaneously and uniformly diffused to the entire surface of the circular aluminum pipe, and the temperature of the circular aluminum pipe is controlled at 300°-320°;

[0012] (7) The seamless aluminum pipe passes through high-strength compressed air, and at this time, the temperature of the seamless aluminum pipe drops to 150°-180°;

[0013] (8) The seamless aluminum pipe is deburred and the weld slag is scraped off, and at this time, the temperature of the seamless aluminum pipe is maintained at 120°-150°;

[0014] (9) The seamless aluminum pipe enters a multi-pass variable-diameter sizing mold to perform continuous rolling until the desired size is reached, and at this time, the temperature of the seamless aluminum pipe is 70°-80°;

[0015] (10) The sized seamless aluminum pipe is straightened, and during the straightening process, the temperature of the seamless aluminum pipe is maintained at 30°-40°;

[0016] (11) The straightened seamless aluminum pipe is cut according to requirements.

[0017] In the step (7), the pressure of the compressed air is 6-8 MPa.

[0018] In the step (5), the high-frequency coil is made of a copper pipe, and the inside of the copper pipe is filled with circulating cooling water.

[0019] In the step (1), the aluminum strip is tension-free during the guiding operation; and in the step (3), the welded pipe aluminum strip is tension-free during the load operation.

[0020] A full-aluminum brazing heat dissipation water tank multi-hole high-frequency welded aluminum pipe is prepared by a full-aluminum brazing heat dissipation water tank multi-hole high-frequency welded aluminum pipe manufacturing method.

[0021] The aluminum strip fin is provided with a plurality of bending sections and is arranged in a continuous bending shape. The aluminum strip fin is tightly attached to the inner wall of the seamless aluminum pipe. The end of the aluminum strip fin forms an arc-shaped portion which is tightly attached to the corner of the seamless aluminum pipe. The weld of the seamless aluminum pipe is located on the inner wall of the seamless aluminum pipe, and the weld on the inner wall is located on the plane of the seamless aluminum pipe.

[0022] Each of the bending sections is provided with a water passing hole.

[0023] The advantage of the present application is that the internal pipe of the full-aluminum radiator water tank is provided with multiple holes, so that the water flow and pressure bearing in the water tank are dispersed, the problem of insufficient heat dissipation is solved, the corrosion resistance, pressure resistance and shock resistance of the water tank are improved, the production cost is saved, and the goal of increasing efficiency and reducing carbon is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the main structure diagram of the full-aluminum brazing connection radiator water tank of the present application.

[0025] Figure 2 is the schematic diagram of the output of the aluminum strip of the present application.

[0026] Figure 3 is the schematic diagram of the aluminum strip passing through the guide device of the present application.

[0027] Figure 4 is the schematic diagram of the first embodiment of the aluminum strip fin forming of the present application.

[0028] Figure 5 is the schematic diagram of the second embodiment of the aluminum strip fin forming of the present application.

[0029] Figure 6 is the schematic diagram of the aluminum strip fin of the present application passing through the mold rolling coating device.

[0030] Figure 7 is the schematic diagram of the aluminum strip fin of the present application and the welded pipe aluminum strip.

[0031] Figure 8 is the schematic diagram of the aluminum strip fin of the present application and the welded pipe aluminum strip passing through the roller mold.

[0032] Figure 9 is the structure schematic diagram of the round aluminum pipe of the present application.

[0033] Figure 10 is the schematic diagram of the round aluminum pipe of the present application passing through the ceramic guide wheel group.

[0034] Figure 11 is the schematic diagram of the round aluminum pipe of the present application passing through the high-frequency welding area.

[0035] Figure 12 is the schematic diagram of the seamless aluminum pipe of the present application passing through the ceramic extrusion roller mold.

[0036] Figure 13 is the schematic diagram of the seamless aluminum pipe of the present application passing through high-strength compressed air.

[0037] Figure 14 is the schematic diagram of the seamless aluminum pipe of the present application for burr removal. is the schematic diagram of the seamless aluminum pipe of the present application for burr removal.

[0038] Figure 15 is the schematic diagram of the seamless aluminum pipe of the present application when passing through multiple sizing dies.

[0039] Figure 16 is the schematic diagram of the present application when straightening the seamless aluminum pipe. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with specific embodiments. The advantages and features of the present application will become more apparent as the description proceeds. However, these embodiments are only exemplary and do not constitute any limitation on the scope of the present application. Those skilled in the art should understand that the details and forms of the technical solutions of the present application can be modified or replaced without departing from the spirit and scope of the present application, and such modifications and replacements fall within the protection scope of the present application.

[0041] Referring to Figures 1 to 16 , the present application relates to a manufacturing method of a porous high-frequency welded aluminum pipe of an all-aluminum brazed heat dissipation water tank, comprising the following steps:

[0042] (1) After the aluminum strip 01 is guided (guided through a guiding device 001), it enters a roller die 03, and the aluminum strip is pressed through the roller die 03, and the aluminum strip fin 04 is formed after the aluminum strip 01 is pressed; in this step (1), the aluminum strip 01 is output through a decoiling device, and the aluminum strip 01 can be a composite aluminum strip containing a brazing layer and an aluminum core layer or an aluminum strip 01 without a brazing layer and an aluminum core layer; the aluminum strip fin 02 is arranged in a continuous bending shape (for example, each bending section is arranged in a U-shaped form);

[0043] (2) The flux 06 is rolled on the upper and lower sides of the aluminum strip fin 04 through a die rolling device 05, and the flux is a conventional component, which can promote the surface cleaning of the combined core material during brazing, enhance the wettability of the combined core material, and improve the brazing quality and overall performance;

[0044] (3) The aluminum strip fin 04 is compounded with the welded pipe aluminum strip 07 and then rolled until it is gradually rolled into a round aluminum pipe 10 with a weld (through multiple roller dies 09), and the weld is arranged along the length direction of the round aluminum pipe 10; in the step (3), the welded pipe aluminum strip is tension-free during operation, and tension during decoiling can easily cause aluminum strip scratches, cause instability in the later forming process, and cause defects in the weld, resulting in the risk of leakage of the subsequent seamless steel pipe;

[0045] (4) The round aluminum pipe 10 is guided through a ceramic guide wheel set 11 and then enters a high-frequency welding area;

[0046] (5) The circular aluminum pipe entering the high-frequency welding area passes through the direct current high-frequency induction coil 12, and the weld 11 of the circular aluminum pipe 10 is instantaneously melted by the magnetic field effect generated during the energization of the direct current high-frequency induction coil 12, and the temperature of the circular aluminum pipe at the weld reaches 658-665 degrees; the high-frequency coil is made of a copper pipe filled with circulating cooling water inside the copper pipe;

[0047] (6) The circular aluminum pipe 10 enters the ceramic extrusion roller die 13 with circulating cooling water to perform instant extrusion, so that the welds are melted together, and the circular aluminum pipe forms a seamless aluminum pipe 14, at this time the edge part of the circular aluminum pipe is instantaneously at a temperature of 658-665 degrees; after the circular aluminum pipe 10 instantaneously passes through the ceramic extrusion roller die 13, the weld temperature is instantaneously uniformly diffused to the entire surface of the circular aluminum pipe, and the temperature of the circular aluminum pipe is controlled at 300-320 degrees, without affecting the change of the overall material quality of the aluminum pipe;

[0048] (7) The seamless aluminum pipe 14 passes through high-strength compressed air 15 at this time, and the temperature of the seamless aluminum pipe 14 drops to 150-180 degrees, and the pressure of the compressed air is 6-8 MPa.

[0049] (8) The seamless aluminum pipe 14 is removed by the burr scraper 151 to remove the burr 16, and the weld slag is scraped off at this time, and the temperature of the seamless aluminum pipe is maintained at 120-150 degrees;

[0050] (9) The seamless aluminum pipe enters the multi-pass variable-diameter sizing die 17 to perform continuous rolling until the required size is reached, at this time the temperature of the seamless aluminum pipe is 70-80 degrees;

[0051] (10) The sized seamless aluminum pipe 14 is straightened, and the temperature of the seamless aluminum pipe is maintained at 30-40 degrees during the straightening process;

[0052] (11) The straightened seamless aluminum pipe 14 is cut according to the requirements (cut and collected).

[0053] The application also relates to a full-aluminum brazing heat-dissipating water tank multi-hole high-frequency welded aluminum pipe prepared by the full-aluminum brazing heat-dissipating water tank multi-hole high-frequency welded aluminum pipe manufacturing method.

[0054] The aluminum strip fin 04 is provided with a plurality of bending sections and is arranged in a continuous bending shape, the aluminum strip fin 04 is tightly attached to the inner wall of the seamless aluminum pipe, the end of the aluminum strip fin 04 forms an arc-shaped part, and the arc-shaped part 3 is tightly attached to the corner 4 of the seamless aluminum pipe 14; the weld of the seamless aluminum pipe is located on the inner wall of the seamless aluminum pipe, and the weld on the inner wall is located on the plane of the seamless aluminum pipe; a water passing hole is formed at each of the bending sections.

[0055] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for manufacturing a porous high-frequency welded aluminum pipe for an all-aluminum brazed heat dissipation water tank, characterized by comprising: a step of welding an aluminum pipe by high frequency welding; a step of forming a plurality of holes in the aluminum pipe; and a step of forming a plurality of fins on the aluminum pipe. It comprises the following steps: (1) pressing the aluminum strip after guiding, the aluminum strip forms aluminum strip fin after pressing; (2) roll coating flux on the upper and lower sides of the aluminum strip fin; (3) rolling the aluminum strip fin and the welded pipe aluminum strip until gradually rolling into a circular aluminum pipe with a gap, the gap is arranged along the length direction of the circular aluminum pipe; (4) guiding the circular aluminum pipe into the high-frequency welding area; (5) making the circular aluminum pipe passing through the direct current high-frequency induction coil, the magnetic field effect generated in the process of the direct current high-frequency induction coil electrifying makes the gap of the circular aluminum pipe melt; (6) making the circular aluminum pipe enter the ceramic extrusion roller die with circulating cooling water to extrude, so that the gap is melted together, and the circular aluminum pipe forms a seamless aluminum pipe; the temperature of the circular aluminum pipe after passing through the ceramic extrusion roller die is controlled at 300-320 DEG C; (7) making the seamless aluminum pipe pass through high-strength compressed air, and the temperature of the seamless aluminum pipe drops to 150-180 DEG C; the pressure of the compressed air is 6-8 MPa; (8) removing burrs and slag from the seamless aluminum pipe, and scraping off the slag, in this process, the temperature of the seamless aluminum pipe is maintained at 120-150 DEG C; (9) making the seamless aluminum pipe enter the multi-pass reducing sizing die for continuous rolling until the required size is reached, and the temperature of the seamless aluminum pipe is maintained at 70-80 DEG C during rolling; (10) straightening the sized seamless aluminum pipe, and the temperature of the seamless aluminum pipe is maintained at 30-40 DEG C during straightening; (11) cutting the straightened seamless aluminum pipe according to requirements.

2. The method for manufacturing a porous high-frequency welded aluminum tube for an all-aluminum brazed radiator according to claim 1, characterized in that, In the step (5), the direct current high-frequency induction coil is made of a copper pipe filled with circulating cooling water.

3. The method of claim 1 or 2, wherein the method is characterized by: In the step (1), the aluminum strip is tensionless during guiding; in the step (3), the welded pipe aluminum strip is tensionless during running.

4. A porous high-frequency welded aluminum pipe for an all-aluminum brazed heat-dissipating water tank, characterized by comprising: an aluminum pipe body; and a plurality of fins formed on an outer surface of the aluminum pipe body. The multi-hole high-frequency welded aluminum pipe is prepared by the method of claim 1-3.

5. The porous high-frequency welded aluminum pipe of an all-aluminum brazed heat dissipation water tank according to claim 4, characterized in that, The aluminum strip fin is provided with a plurality of bending sections and is arranged in a continuous bending shape, the aluminum strip fin is tightly attached to the inner wall of the seamless aluminum pipe, the end of the aluminum strip fin forms an arc-shaped part, and the arc-shaped part is tightly attached to the corner of the seamless aluminum pipe.

6. The porous high-frequency welded aluminum pipe of an all-aluminum brazed heat dissipation water tank according to claim 5, characterized in that, A water passing hole is formed at each bending section.

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