A forming process method for a small-aperture liquid-cooled radiator

Abstract

The present invention belongs to the technical field of liquid-cooled radiators, and particularly relates to a process for forming a small-aperture liquid-cooled radiator. The technical solution is as follows: a process for forming a small-aperture liquid-cooled radiator, comprising the following steps: S1: assembling a sealing tool and connecting it to an external temperature and pressure control device; S2: sealing the liquid inlet to the collection tank with primary temperature and pressure control; S3: sealing the liquid inlet to the collection tank with secondary temperature and pressure control; S4: sealing the liquid outlet to the collection tank with primary temperature and pressure control; S5: sealing the liquid outlet to the collection tank with secondary temperature and pressure control. The present invention provides a process for forming a small-aperture liquid-cooled radiator, ensuring reliable sealing between 1,000 micro-aperture metal pipes and the adapter holes in the collection tank, and ensuring that the connection between the two has a certain tensile strength.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid-cooled radiators, and in particular relates to a forming process method for a small-aperture liquid-cooled radiator. Background Art

[0002] Small micro-aperture pipe liquid-cooled radiators have the characteristics of high heat transfer coefficient, compact size and simple structure. However, the connection between the small micro-aperture metal pipes and the liquid collection tank needs to be sealed. Due to the small outer diameter of the metal pipes and the large number of them, the traditional vacuum brazing process or reflow soldering process cannot achieve the sealing effect and easily causes the micro-aperture pipes to be blocked.

[0003] 1,000 micro-aperture metal pipes with a wall thickness of 0.2mm or less and an outer diameter of 0.8mm or less must be inserted into a manifold with a matching hole. The gaps between the pipes and the manifold holes must be welded and sealed simultaneously. Because the metal pipe walls are too thin to withstand pressure, existing vacuum brazing processes are impractical. During tin-lead reflow soldering, the surface tension of the solder prevents the solder from entering the gap between the pipes and the matching holes, preventing a reliable seal. Summary of the Invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a small-aperture liquid-cooled radiator forming process method to ensure reliable sealing between 1,000 micro-aperture metal pipes and the adapter holes of the liquid collecting tank, and to make the connection between the two have a certain tensile strength.

[0005] The technical solution adopted in the present invention is:

[0006] A small-aperture liquid-cooling radiator forming process method comprises the following steps:

[0007] S1: Sealing tooling assembly and connection with external temperature and pressure control equipment;

[0008] S2: Initial temperature and pressure control to seal the liquid inlet collection tank and micro-aperture metal tube;

[0009] S3: secondary temperature-controlled sealed liquid inlet collection tank and micro-aperture metal tube;

[0010] S4: First temperature and pressure control to seal the liquid outlet tank and micro-aperture metal tube;

[0011] S5: Secondary temperature control seal liquid outlet collection tank and micro-aperture metal tube.

[0012] The present invention can achieve the sealing of micro-aperture metal tubes with an outer diameter of ≤0.8mm and a wall thickness of ≤0.2mm and the matching holes of a liquid collecting box; achieve the simultaneous sealing of the gaps between the metal tubes and the matching holes when the number of metal tubes is ≥1000; and achieve the compressive strength between the tube wall and the gap after sealing to be ≥1Mpa, and the tensile strength and pressure ≤20N.

[0013] As a preferred embodiment of the present invention, step S1 is specifically as follows:

[0014] After passing the micro-aperture metal tube through several fixing plates, it is passed into the liquid inlet collecting box and the liquid outlet collecting box, and the liquid inlet collecting box and the liquid outlet collecting box are fixed on the support frame; two low elastic modulus rubber plates are glued on the backing and respectively adhered to the inner surface bosses of the two constraint cover plates; the two constraint cover plates are respectively installed into the liquid inlet collecting box and the liquid outlet collecting box, and fastened with screws.

[0015] As a preferred embodiment of the present invention, step S2 is specifically as follows:

[0016] Place the assembled sealing tooling upright, connect the air booster, pressure regulating valve and pressure gauge in series to the inlet end of the liquid inlet collecting tank, and open the restraint cover at the liquid inlet collecting tank; inject sealing rubber into the liquid inlet collecting tank; quickly install the restraint cover back into the liquid inlet collecting tank, open the air booster, and adjust the pressure regulating valve until the pressure gauge shows 20kPa, so that the rubber can overcome its surface tension under the action of external pressure and fully penetrate into the gap between the metal pipe and the adapter hole. After stabilizing for a certain period of time, disconnect the pressurization, bake the sealing tooling, and let it stand.

[0017] As a preferred solution of the present invention, the sealing rubber is injected into the liquid inlet collecting tank so that the injection depth is lower than the edge of the pit of the liquid inlet collecting tank.

[0018] As a preferred embodiment of the present invention, when baking and standing the sealing tool, the sealing tool is placed in a 45° C. oven and left to stand for 4 hours.

[0019] As a preferred embodiment of the present invention, step S3 is specifically as follows:

[0020] Take out the sealing tooling, turn it over and stand it upright again, inject resin-based sealant into the pit outside the liquid inlet and collecting box, and place it in an 80°C oven for curing; after taking it out, turn the sealing tooling over again, open the restraining cover of the liquid inlet and collecting box, and inject resin-based sealant into the box again. The injection amount should be lower than the port height of the micro-aperture metal tube, and then place it in an 80°C oven for curing again.

[0021] As a preferred embodiment of the present invention, step S4 is specifically as follows:

[0022] Place the assembled sealing tooling upright, connect the air booster, pressure regulating valve and pressure gauge in series to the inlet end of the liquid outlet collecting tank, and open the restraint cover at the liquid outlet collecting tank; inject sealing rubber into the liquid outlet collecting tank; quickly install the restraint cover back into the liquid outlet collecting tank, open the air booster, and adjust the pressure regulating valve until the pressure gauge shows 20kPa, so that the rubber can overcome its surface tension under the action of external pressure and fully penetrate into the gap between the metal pipe and the adapter hole. After stabilizing for a certain period of time, disconnect the pressurization, bake the sealing tooling, and let it stand.

[0023] As a preferred embodiment of the present invention, the sealing rubber is injected into the liquid outlet and liquid collecting tank so that the injection depth is lower than the edge of the pit of the liquid outlet and liquid collecting tank.

[0024] As a preferred embodiment of the present invention, when baking and standing the sealing tool, the sealing tool is placed in a 45° C. oven and left to stand for 4 hours.

[0025] As a preferred embodiment of the present invention, step S5 is specifically as follows:

[0026] Take out the sealing tooling, turn it over and stand it upright again, inject resin-based sealant into the pit outside the liquid outlet and collecting box, and place it in an 80°C oven for curing; after taking it out, turn the sealing tooling over again, open the restraining cover of the liquid outlet and collecting box, and inject resin-based sealant into the box again. The injection amount height should be lower than the port height of the micro-aperture metal tube, and then place it in an 80°C oven for curing again.

[0027] The beneficial effects of the present invention are:

[0028] This invention can seal micro-aperture metal tubes with an outer diameter of ≤0.8mm and a wall thickness of ≤0.2mm with the matching holes of a liquid collection tank. It can also simultaneously seal the gaps between ≥1000 metal tubes and the matching holes in batches. After sealing, the compressive strength between the tube wall and the gap is ≥1 MPa, and the tensile strength is ≤20N. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of a liquid cooling radiator;

[0030] Figure 2 It is the front view of the present invention after assembly;

[0031] Figure 3 is a bottom view of the present invention after assembly;

[0032] Figure 4 is a schematic diagram of the structure of the present invention when connected to an air supercharger;

[0033] Figure 5 It is a schematic diagram of the structure of the present invention after flipping;

[0034] Figure 6is a schematic diagram of the structure of the present invention after being flipped again;

[0035] Figure 7 It is a process flow chart of the present invention.

[0036] In the figure: 1-micro-aperture metal tube; 2-liquid inlet collecting box; 3-liquid outlet collecting box; 4-fixing plate; 5-support frame; 6-low elastic modulus rubber plate; 7-constraint cover plate; 8-screw; 9-air booster; 10-pressure regulating valve; 11-pressure gauge; 12-external support pit. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.

[0039] like Figure 1 As shown, in order to ensure reliable sealing between 1,000 micro-aperture metal pipes and the adapting holes of the liquid collecting tank, and to ensure that the connection between the two has a certain tensile strength, the sealing process adopts the temperature control and pressure composite potting method of organic materials. The main sealing processes are divided into:

[0040] 1) Assemble the sealing tooling and connect it to external temperature and pressure control equipment;

[0041] 2) Initial temperature and pressure control sealing;

[0042] 3) Secondary temperature control and sealing.

[0043] See the process flow chart Figure 7 shown.

[0044] First, pass the micro-aperture metal tube 1 through the three fixed plates 4, and then pass it into the liquid inlet collection box 2 and the liquid outlet collection box 3, and fix the liquid inlet collection box 2 and the liquid outlet collection box 3 on the support frame 5. At this time, the micro-aperture metal tube 1 is not constrained in its axial direction and can move freely. After the two low elastic modulus rubber plates 6 are glued on the inner surface bosses of the two constraint cover plates 7, they are installed into the liquid inlet collection box 2 and the liquid outlet collection box 3 and fastened with screws 8. By controlling the absolute distance between the two low elastic modulus rubber plates 6, interference contact of the micro-aperture metal tube 1 is achieved. Since the axial flexural resistance of the micro-aperture metal tube 1 is improved under the support of the fixed plates 4, the liquid inlet collection box 2 and the liquid outlet collection box 3, the interference size is compensated by the compression deformation of the low elastic modulus rubber plates 6, and the airtightness of the two ends of the micro-aperture metal tube 1 is achieved. After installation, as shown Figure 2 and Figure 3 shown.

[0045] Place the assembled sealing tooling upright, connect the air booster 9, pressure regulating valve 10 and pressure gauge 11 in series to the inlet end of the liquid inlet collecting tank 2, and open the restraining cover 7 at the liquid inlet collecting tank 2. Figure 4 As shown. Inject potting rubber with low dynamic viscosity into the inlet manifold 2, to a depth below the edge of the recess in the inlet manifold 2. Quickly reinstall the restraining cover 7 into the inlet manifold 2, open the air booster 9, and adjust the pressure regulating valve 10 until the pressure gauge 11 reads 20 kPa. This will allow the rubber, under the action of external pressure, to overcome its surface tension and fully penetrate the gap between the metal tube and the adapter hole. After stabilization for a certain period of time, disconnect the pressurization and place the sealing fixture in a 45°C oven for 4 hours.

[0046] Take out the sealing tool and turn it upside down again. Figure 5 As shown, inject a resin-based sealant with good fluidity into the outer pit 12 of the liquid inlet and liquid collection box 2, and put it into an 80℃ oven for curing. After taking it out, turn the sealing tool over again and open the restraining cover 7 of the liquid inlet and liquid collection box 2, as shown in FIG. Figure 6 As shown, a resin-based sealant with good fluidity is injected into the box again, the injection height is lower than the height of the port 1 of the micro-aperture metal tube, and the box is placed in an 80°C oven for curing again.

[0047] The above steps complete the sealing process on one side of the liquid inlet collecting box 2, and the sealing process between the liquid outlet collecting box 3 and the micro-aperture metal tube 1 can be completed by repeating the above steps.

[0048] Based on the above sealing process steps, the gap between the metal tube and the adapter hole is uniformly sealed with silicone. The silicone's good elasticity effectively mitigates gap size variations caused by vibration or thermal expansion coefficient variations in the metal tube. Coating the silicone rubber with a resin-based sealant with good strength and hardness effectively increases the connection strength between the metal tube and the manifold.

[0049] The invention overcomes the disadvantage of poor sealing performance of traditional vacuum brazing and tin-lead reflow soldering in porous and small gap welding, and proposes a composite temperature and pressure control sealing process method.

[0050] The present invention realizes the sealing of a micro-aperture metal tube 1 with an outer diameter of ≤0.8mm and a wall thickness of ≤0.2mm and the adapter hole of a liquid collecting box; realizes the batch and simultaneous sealing of the gaps between the metal tubes and the adapter holes when the number of metal tubes is ≥1000; and the compressive strength between the tube wall and the gap after sealing is ≥1Mpa, and the tensile strength and pressure are ≤20N.

[0051] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention falls within the scope of protection of the present invention.

Claims

1. A small-aperture liquid-cooled radiator forming process method, characterized by: The following steps are involved: S1: Sealing tooling assembly and connection with external temperature and pressure control equipment; S2: First temperature and pressure control to seal the liquid inlet collecting box (2) and the micro-aperture metal tube (1); S3: secondary temperature-controlled sealed liquid inlet collecting tank (2) and micro-aperture metal tube (1); S4: First temperature and pressure control to seal the liquid outlet collecting tank (3) and the micro-aperture metal tube (1); S5: secondary temperature-controlled sealed liquid outlet collecting tank (3) and micro-aperture metal tube (1); Step S1 is specifically as follows: After passing the micro-aperture metal tube (1) through a plurality of fixing plates (4), the micro-aperture metal tube (1) is passed through the liquid inlet collecting box (2) and the liquid outlet collecting box (3), and the liquid inlet collecting box (2) and the liquid outlet collecting box (3) are fixed on the support frame (5); two low elastic modulus rubber plates (6) are respectively glued to the inner surface bosses of the two constraint cover plates (7); the two constraint cover plates (7) are respectively installed in the liquid inlet collecting box (2) and the liquid outlet collecting box (3), and fastened with screws (8); Step S2 is specifically as follows: The assembled sealing tooling is placed upright, the air booster (9), the pressure regulating valve (10) and the pressure gauge (11) are connected in series to the inlet end of the liquid inlet collecting box (2), and the restraining cover (7) at the liquid inlet collecting box (2) is opened; the sealing rubber is injected into the liquid inlet collecting box (2); the restraining cover (7) is quickly installed back into the liquid inlet collecting box (2), the air booster (9) is opened, and the pressure regulating valve (10) is adjusted until the pressure gauge shows 20 kPa, so that the rubber overcomes its surface tension under the action of external pressure and fully penetrates into the gap between the metal pipe and the adapter hole. After stabilization for a certain period of time, the pressurization is disconnected, and the sealing tooling is baked and left to stand; Step S3 is specifically as follows: The sealing tool is taken out, turned over and erected again, and a resin-based sealant is injected into the outer pit (12) of the liquid inlet collecting box (2), and the box is placed in an 80°C oven for curing. After taking it out, the sealing tool is turned over again, and the restraining cover (7) of the liquid inlet collecting box (2) is opened, and the resin-based sealant is injected into the box again, with the injection amount height being lower than the port height of the micro-aperture metal tube (1), and the box is placed in an 80°C oven for curing again.

2. The method for forming a small-aperture liquid-cooled radiator according to claim 1, characterized in that: The sealing rubber is injected into the liquid inlet collecting box (2) so that the injection depth is lower than the edge of the pit of the liquid inlet collecting box (2).

3. The method for forming a small-aperture liquid-cooled radiator according to claim 1, characterized in that: When baking and resting the sealing tooling, place the sealing tooling in a 45°C oven and let it rest for 4 hours.

4. The method for forming a small-aperture liquid-cooled radiator according to claim 1, wherein: Step S4 is specifically as follows: The assembled sealing tooling is placed upright, the air booster (9), the pressure regulating valve (10) and the pressure gauge (11) are connected in series to the inlet end of the liquid outlet collecting box (3), and the restraining cover (7) at the liquid outlet collecting box (3) is opened; the sealing rubber is injected into the liquid outlet collecting box (3); the restraining cover (7) is quickly installed back into the liquid outlet collecting box (3), the air booster (9) is opened, and the pressure regulating valve (10) is adjusted until the pressure gauge shows 20 kPa, so that the rubber overcomes its surface tension under the action of external pressure and fully penetrates into the gap between the metal pipe and the adapter hole. After stabilization for a certain period of time, the pressurization is disconnected, and the sealing tooling is baked and left to stand.

5. The method for forming a small-aperture liquid-cooled radiator according to claim 4, characterized in that: The sealing rubber is injected into the liquid outlet collecting box (3) so that the injection depth is lower than the edge of the pit of the liquid outlet collecting box (3).

6. The method for forming a small-aperture liquid-cooled radiator according to claim 4, characterized in that: When baking and resting the sealing tooling, place the sealing tooling in a 45°C oven and let it rest for 4 hours.

7. The method for forming a small-aperture liquid-cooled radiator according to claim 4, characterized in that: Step S5 is specifically as follows: The sealing tool is taken out, turned over and erected again, and a resin-based sealant is injected into the outer pit (12) of the liquid outlet collecting box (3), and the box is placed in an 80°C oven for curing; after being taken out, the sealing tool is turned over again, and the restraining cover (7) of the liquid outlet collecting box (3) is opened, and the resin-based sealant is injected into the box again, with the injection amount height being lower than the port height of the micro-aperture metal tube (1), and the box is placed in an 80°C oven for curing again.

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