Small-aperture liquid cooling radiator forming process method

Abstract

The invention belongs to the technical field of liquid cooling radiators, and particularly relates to a forming process method of a small-aperture liquid cooling radiator. According to the technical scheme, the forming process method for the small-aperture liquid cooling radiator comprises the following steps that S1, a sealing tool is assembled and connected with temperature-control and pressure-control external equipment; s2, sealing the liquid inlet and collecting box by controlling temperature and pressure for the first time; s3, secondary temperature control is conducted, and the liquid inlet and collecting box is sealed; s4, sealing the liquid outlet and collecting box by controlling temperature and pressure for the first time; and S5, secondary temperature control is conducted, and the liquid outlet and collecting box is sealed. The invention provides a forming process method of a small-aperture liquid cooling radiator, which ensures reliable sealing between 1000 magnitude-order micro-aperture metal pipelines and adaptive holes of a liquid collecting box, and enables the connection between the two to have certain tensile strength.

Description

Technical Field

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

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

[0003] The wall thickness of the micro-aperture metal pipe is ≤0.2mm, the outer diameter is ≤0.8mm, and the number reaches 1000. 1000 micro-aperture metal pipes need to be inserted into the liquid collecting box with the matching hole. The gaps between the 1000 micro-aperture metal pipes and the matching holes of the liquid collecting box need to be welded and sealed at the same time. Since the metal pipe wall is thin and cannot withstand pressure, the existing vacuum brazing process cannot be carried out. In the tin-lead reflow soldering, due to the surface tension of the solder, the solder cannot enter the gap between the metal pipe and the matching hole, and the reliable sealing effect cannot be achieved. 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 molding 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 by the present invention is:

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

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

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

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

[0010] S4: First temperature and pressure control to seal the liquid outlet and collecting tank and the 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 a micro-aperture metal tube with an outer diameter of ≤0.8mm and a wall thickness of ≤0.2mm and an adapter hole of a liquid collecting box; achieve the simultaneous sealing of the metal tubes with a number of ≥1000 and the gaps between the metal tubes and the adapter holes; after sealing, the compressive strength between the tube wall and the gap is ≥1Mpa, and the tensile strength and pressure are ≮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 inserted 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 inner surface bosses of the two constraint cover plates; the two constraint cover plates are respectively installed in 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:

[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, and bake and let the sealing tooling stand.

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

[0018] As a preferred embodiment of the present invention, when the sealing tool is baked and allowed to stand, the sealing tool is placed in a 45° C. oven and allowed 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 collecting box, and put it into an 80°C oven for curing; after taking it out, turn the sealing tooling over again, open the restraining cover of the liquid inlet 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 put it into an 80°C oven for curing again.

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

[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 to the liquid outlet collecting tank, open the air booster, 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 box so that the injection depth is lower than the edge of the pit of the liquid outlet and liquid collecting box.

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

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

[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 collecting box, and put it into an 80°C oven for curing; after taking it out, turn the sealing tooling over again, open the restraining cover of the liquid outlet 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 put it into an 80°C oven for curing again.

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

[0028] 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 hole of the liquid collecting box. The present invention can achieve the batch and simultaneous sealing of the gaps between the metal tubes and the matching holes when the number of metal tubes is ≥1000. After sealing, the compressive strength between the tube wall and the gap is ≥1Mpa, and the tensile strength and pressure are ≮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 after the present invention is assembled;

[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 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- supporting frame; 6- low elastic modulus rubber plate; 7- restraining cover plate; 8- screws; 9- air booster; 10- pressure regulating valve; 11- pressure gauge; 12- external support pit. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 here 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 merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0039] like Figure 1 As shown, in order to ensure reliable sealing between 1,000 micro-aperture metal pipes and the adapter holes of the liquid collecting box, and to make the connection between the two have a certain tensile strength, the sealing process adopts organic material temperature control and pressurized composite potting. The main sealing processes are divided into:

[0040] 1) Sealing tooling assembly and connection with external temperature and pressure control equipment;

[0041] 2) The first temperature and pressure controlled sealing;

[0042] 3) Secondary temperature control sealing.

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

[0044] First, the micro-aperture metal tube 1 is passed through the three fixed plates 4, and then passed into 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. 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 adhesively bonded to the inner surface bosses of the two constraining cover plates 7, they are installed into the liquid inlet collecting box 2 and the liquid outlet collecting 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 collecting box 2 and the liquid outlet collecting 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 Figure 2 and Figure 3 shown.

[0045] Place the assembled sealing tooling upright, connect the air booster 9, the pressure regulating valve 10 and the 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 collecting box 2, and the injection depth is lower than the edge of the pit of the inlet collecting box 2. Quickly install the restraining cover plate 7 back to the inlet collecting box 2, open the air booster 9, and adjust the pressure regulating valve 10 until the pressure gauge 11 shows 20kpa, so that the rubber can overcome its surface tension under the external pressure and fully penetrate into the gap between the metal pipe and the adapter hole. After stabilization for a certain period of time, disconnect the pressurization, and put the sealing tooling into a 45℃ oven for 4 hours.

[0046] Take out the sealing tool and turn it upside down again. Figure 5 As shown, a resin-based sealant with good fluidity is injected into the outer pit 12 of the liquid inlet and liquid collecting box 2, and then placed in an 80°C oven for curing. After taking it out, the sealing tool is turned over again, and the restraining cover plate 7 of the liquid inlet and liquid collecting box 2 is opened, 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 can be sealed more evenly with silicone. Since silicone has good elasticity, it can effectively alleviate the gap size changes caused by the vibration of the metal tube or the different thermal expansion coefficients. Covering the outside of the silicone rubber with a resin-based sealant with good strength and hardness can effectively increase the connection strength between the metal tube and the liquid collecting box.

[0049] The invention overcomes the disadvantage of poor sealing performance of conventional vacuum brazing and tin-lead reflow soldering in porous small gap welding, and proposes a composite temperature-controlled and pressure-controlled 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 an 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 various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A forming process method for a small-aperture liquid-cooled radiator, characterized in that: 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: firstly controlling the temperature and pressure to seal the liquid outlet collecting box (3) and the micro-aperture metal tube (1); S5: Secondary temperature control and sealing of the liquid outlet and collecting tank (3) and the micro-aperture metal tube (1).

2. The method for forming a small-aperture liquid-cooled radiator according to claim 1, characterized in that: Step S1 is specifically as follows: After passing through a plurality of fixing plates (4), the micro-aperture metal tube (1) is passed into 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 a support frame (5); two low elastic modulus rubber plates (6) are respectively glued to the inner surface bosses of two restraining cover plates (7); the two restraining cover plates (7) are respectively installed into the liquid inlet collecting box (2) and the liquid outlet collecting box (3), and are fastened with screws (8).

3. The method for forming a small-aperture liquid-cooled radiator according to claim 2, characterized in that: Step S2 is specifically as follows: The assembled sealing tool 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 tool is baked and left to stand.

4. The method for forming a small-aperture liquid-cooled radiator according to claim 3, 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).

5. The method for forming a small-aperture liquid-cooled heat sink according to claim 3, characterized in that: When the sealing tool is baked and left to stand, the sealing tool is placed in a 45°C oven and left to stand for 4 hours.

6. The method for forming a small-aperture liquid-cooled heat sink according to claim 3, characterized in that: Step S3 is specifically as follows: The sealing tool is taken out, turned over and stood upright again, and a resin-based sealant is injected into the outer pit (12) of the liquid inlet and liquid collecting box (2), 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 inlet and liquid 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.

7. The method for forming a small-aperture liquid-cooled heat sink according to claim 2, characterized in that: Step S4 is specifically as follows: The assembled sealing tool 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 tool is baked and left to stand.

8. The method for forming a small-aperture liquid-cooled heat sink according to claim 7, 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).

9. The method for forming a small-aperture liquid-cooled heat sink according to claim 7, characterized in that: When the sealing tool is baked and left to stand, the sealing tool is placed in a 45°C oven and left to stand for 4 hours.

10. The method for forming a small-aperture liquid-cooled heat sink according to claim 7, characterized in that: Step S5 is specifically as follows: The sealing tool is taken out, turned over and stood upright again, and a resin-based sealant is injected into the outer pit (12) of the liquid outlet and 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 and 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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