A special brazing fixture for a flow-through liquid cooling plate

Abstract

The present invention discloses a special brazing fixture for a flow-through liquid cooling plate, which comprises a brazing fixture body, a support mechanism and a clamping mechanism; the brazing fixture body includes a plurality of parallel longitudinal beams and two load-bearing cross beams connected to both ends of the longitudinal beams; the transverse support rods arranged on the load-bearing cross beams cooperate with the support strips laid on the longitudinal beams and the support mechanism to suspend and fix the flow-through liquid cooling plate on the brazing fixture, thus solving the adhesion problem between the two; in addition, the clamping mechanism can prevent the manifold from deforming due to heat during brazing, and the support strips laid on the longitudinal beams can maintain the flatness of the flow-through liquid cooling plate and prevent its micro-channel tube group from deforming due to heat during brazing, thus solving the problem of heat deformation of the liquid cooling plate; moreover, the vertical insertion posts and insertion holes arranged on the support mechanism can stack the special brazing fixtures on top of each other, achieving the purpose of batch brazing, facilitating the process turnover at the same time, and greatly improving the product quality and production efficiency of the liquid cooling plate.

Description

Technical Field

[0001] The present invention relates to a fixture, in particular to a special fixture for brazing a manifold liquid-cooled plate, belonging to the field of mechanical manufacturing. Background Art

[0002] The liquid-cooled plate is a key component for the heat dissipation of power batteries. Most of the existing liquid-cooled plates for heat dissipation of electric vehicle power batteries are manifold liquid-cooled plates composed of manifold tubes and shunt flat tubes. The manifold liquid-cooled plate is mostly integrally formed by high-temperature brazing. Therefore, there are many problems in production: First, the deformation problem. For large liquid-cooled plates (positive area 1800*980), on the one hand, the structural form of the liquid-cooled plate and the selected thin-walled aluminum material are prone to thermal stress deformation during high-temperature brazing; on the other hand, there are problems with the accuracy and deformation of the bracket itself, and the different deformation rates of the aluminum workpiece and the steel bracket at high temperatures. These reasons cause the produced liquid-cooled plates to be prone to defective products. Second, the adhesion problem. Since there is a 10% 4045 solder layer on the surface of the manifold tube, it is necessary to apply a soldering resist on the support position of the manifold tube on the fixture to prevent the adhesion between the manifold tube and the fixture during the brazing process. However, the daily management of applying the soldering resist is very difficult. Once the soldering resist is insufficiently applied or missed, the workpiece and the fixture will adhere and cannot be unloaded, or the workpiece will be damaged or have a poor appearance after unloading; these reasons cause the produced liquid-cooled plates to be prone to defective products, which not only wastes manpower, material resources and the financial resources of the enterprise, but also greatly affects the production efficiency of the liquid-cooled plate. Therefore, there is an urgent need for a method to solve these problems existing in the production of liquid-cooled plates. Summary of the Invention

[0003] To solve the above problems existing in the production of liquid-cooled plates, the present invention proposes a special fixture for brazing a manifold liquid-cooled plate, which not only solves the adhesion problem between the liquid-cooled plate and the fixture, but also avoids the deformation of the liquid-cooled plate, and at the same time can meet the needs of mass production. The specific technical solution is as follows:

[0004] A special fixture for brazing a manifold liquid-cooled plate, comprising a brazing fixture body, a support mechanism and a clamping mechanism; the brazing fixture body is used to support the manifold liquid-cooled plate, and it comprises a plurality of parallel longitudinal beams and two load-bearing cross beams connected to both ends of the longitudinal beams; the manifold liquid-cooled plate comprises two manifold tubes and a plurality of micro-channel tube groups arranged in parallel at equal intervals, and both ends of the micro-channel tube groups are respectively connected to the two manifold tubes; transverse fixing beams are arranged on the inner sides of the load-bearing cross beams, and transverse support rods for supporting both ends of the micro-channel tube groups are arranged on the transverse fixing beams; the support mechanism is arranged at both ends of the load-bearing cross beams and is used to support the corresponding side of the manifold tube; the clamping mechanism is used to clamp the manifold tube.

[0005] The aforementioned special brazing fixture for the flow-through liquid cooling plate, wherein the support mechanism includes a support fixing base fixed on the load-bearing cross beam, and the support fixing base is provided with a plug-in short rod and a limit short rod that are arranged in parallel and can be inserted and withdrawn. The plug-in short rod is located below the limit short rod and is used to insert and horizontally fix the manifold pipe, and the limit short rod is used to vertically limit and fix the manifold pipe.

[0006] Preferably, for the aforementioned special brazing fixture for the flow-through liquid cooling plate, there are several clamping mechanisms corresponding to each manifold pipe, and each clamping mechanism includes a clamping plate base, a clamping plate body and a central axis screw. The clamping plate base is fixed on the brazing fixture body, and the central axis screw passes through the clamping plate body and installs it on the clamping plate base. By rotating the central axis screw, the clamping plate body can be rotated to clamp or release the manifold pipe.

[0007] More preferably, for the aforementioned special brazing fixture for the flow-through liquid cooling plate, the clamping mechanisms corresponding to each manifold pipe are divided into two groups. One group is installed on the outside of the manifold pipe, and the other group is installed on the inside of the manifold pipe.

[0008] Even more preferably, the clamping mechanism on the outside of the manifold pipe is fixed on the load-bearing cross beam, the clamping mechanism on the inside of the manifold pipe is fixed on the horizontal support rod, and the clamping mechanism on the outside is arranged opposite to the micro-channel pipe group; the clamping mechanism on the inside is located within the interval of the micro-channel pipe group.

[0009] For the aforementioned special brazing fixture for the flow-through liquid cooling plate, a number of support bars are also horizontally and equally spaced between the longitudinal beam and the flow-through liquid cooling plate. The support bars are square steel pipes, and one side edge of them is welded in a V-shaped groove pre-cut on the longitudinal beam, and the side edge opposite to this side edge supports the micro-channel pipe group of the flow-through liquid cooling plate.

[0010] Preferably, the depth of the V-shaped groove is less than half of the diagonal length of the cross-section of the support bar.

[0011] Preferably, for the aforementioned special brazing fixture for the flow-through liquid cooling plate, a vertical plug-in column is also provided at the top of the support fixing base. Support plates are provided under both ends of the load-bearing cross beam, and plug-in holes for the vertical plug-in column to be inserted are provided on the support plates.

[0012] Preferably, for the aforementioned special brazing fixture for the flow-through liquid cooling plate, it further includes a handle for carrying the special brazing fixture. The handle is longitudinally arranged, and its two ends are connected to the support fixing base.

[0013] Preferably, for the aforementioned special brazing fixture for the flow-through liquid cooling plate, the two load-bearing cross beams are made of angle steel.

[0014] The beneficial effects of the present invention are:

[0015] The special fixture for brazing the flow-accumulating liquid cooling plate proposed by the present invention, the transverse support rods arranged on the load-bearing cross beam cooperate with the support strips and the support mechanism laid on the longitudinal beam to suspend and fix the flow-accumulating liquid cooling plate on the brazing fixture, thus solving the adhesion problem between the two; in addition, the clamping mechanism provided can prevent the flow-accumulating pipe from deforming due to heat during brazing, and the support strips laid on the longitudinal beam can maintain the flatness of the flow-accumulating liquid cooling plate and prevent the micro-channel pipe group from deforming due to heat during brazing, thus solving the problem of heat-induced deformation of the flow-accumulating liquid cooling plate during brazing; and the vertical insertion posts and insertion holes provided on the support mechanism can stack the special brazing fixtures on top of each other, achieving the purpose of batch brazing, facilitating the process turnover at the same time, and greatly improving the product quality and production efficiency of the liquid cooling plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of the special brazing fixture for the flow-accumulating liquid cooling plate and the flow-accumulating liquid cooling plate of the present invention;

[0017] Figure 2 FIG. is a schematic bottom structure diagram of the special brazing fixture for the flow-accumulating liquid cooling plate of the present invention;

[0018] Figure 3 FIG. is a schematic structural diagram of the special brazing fixture for the flow-accumulating liquid cooling plate of the present invention;

[0019] Figure 4 、 Figure 5 FIG. is a schematic structural diagram of the support assembly of the present invention;

[0020] Figures 6 to 8 FIG. is a schematic diagram of the structure and distribution of the clamping assembly of the present invention;

[0021] Figure 9 FIG. is a schematic structural diagram of the support plate of the present invention.

[0022] In the figure: 1. Load-bearing cross beam, 2. Longitudinal beam, 201. V-shaped groove, 3. Transverse fixed beam, 4. Flow-accumulating liquid cooling plate, 401. Flow-accumulating pipe, 402. Micro-channel pipe group, 5. Support assembly, 501. Insertion short rod, 502. Limit short rod, 503. Vertical insertion post, 6. Transverse support rod, 7. Clamping assembly, 701. Base plate of the clamping plate, 702. Body of the clamping plate, 703. Central axis screw, 8. Support strip, 9. Support plate, 901. Insertion hole, 10. Handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings:

[0024] Refer to Figures 1 to 9, A special brazing fixture for a flow-through liquid cooling plate, comprising a brazing fixture body, a support mechanism 5 and a clamping mechanism 7; the brazing fixture body is used to support the flow-through liquid cooling plate 4, and it includes several longitudinally arranged beams 2 and two load-bearing cross beams 1 connected to both ends of the longitudinally arranged beams 2; the flow-through liquid cooling plate 4 includes two manifold pipes 401 and a plurality of microchannel pipe groups 402 arranged in parallel at equal intervals, and both ends of the microchannel pipe groups 402 are respectively connected to the two manifold pipes 401; on the inner sides of the load-bearing cross beams 1, there are transversely fixed beams 3, and on the transversely fixed beams 3, there are transverse support rods 6 for supporting the microchannel pipe groups 402; the transverse support rods 6 support at the roots of the microchannel pipe groups 402, and the support mechanism is arranged at both ends of the load-bearing cross beams 1 for supporting the corresponding side of the manifold pipe 401; the transverse support rods 6 cooperate with the support mechanism to suspend the two manifold pipes 401 above the load-bearing cross beams 1, avoiding the contact between the manifold pipes 401 and the fixture body, thus solving the problem of adhesion between the manifold pipes 401 and the fixture body. The clamping mechanism is used to clamp the manifold pipes 401 and can prevent the manifold pipes 401 from being deformed by heat.

[0025] In this embodiment, the support mechanism 5 of the special brazing fixture for the flow-through liquid cooling plate includes a support fixing seat fixed on the load-bearing cross beam 1, and on the support fixing seat, there are parallelly arranged and insertable and extractable short insertion rods 501 and short limiting rods 502; the short insertion rods 501 are located below the short limiting rods 502 and are used to insert and transversely fix and support the manifold pipe 401, and the short limiting rods 502 are used to vertically limit and fix the manifold pipe 401. The short insertion rods 501 and the short limiting rods 502 are extracted, the flow-through liquid cooling plate 4 is placed on the fixture body, then the short insertion rods 501 are inserted into the manifold pipe 401 to prevent the flow-through liquid cooling plate 4 from shifting left and right, and the short limiting rods 502 are located above the manifold pipe 401 and cooperate with the aforementioned transverse support rods 6 to limit the up and down displacement of the flow-through liquid cooling plate 4.

[0026] For the special brazing fixture for the flow-through liquid cooling plate in this embodiment, there are several clamping mechanisms 7 corresponding to each manifold pipe 401, and each clamping mechanism 7 includes a clamping plate base 701, a clamping plate body 702 and a central axis screw 703. The clamping plate base 701 is fixed on the brazing fixture body, the central axis screw 703 passes through the clamping plate body 702 and installs it on the clamping plate base 701, and by rotating the central axis screw 703, the clamping plate body 703 can be rotated, so as to clamp or loosen the manifold pipe 401.

[0027] As a preferred embodiment, the clamping mechanism 7 corresponding to each manifold 401 is divided into two groups, one group is installed on the outside of the manifold 401, and the other group is installed on the inside of the manifold 401. Further preferably, the clamping mechanism 7 on the outside of the manifold 401 is fixed on the load-bearing cross beam 1, and the clamping mechanism 7 on the inside of the manifold 401 is fixed on the transverse support rod 6, and the clamping mechanism 7 on the outside is arranged facing the micro-channel tube group 402; the clamping mechanism 7 on the inside is located within the interval of the micro-channel tube group 402. This fully avoids the deformation of the manifold 401 caused by uneven force and heat.

[0028] In this embodiment, a number of support bars 8 are also laid horizontally and equidistantly between the longitudinal beams 2 and the manifold liquid cooling plate 4. The support bars 8 are square steel pipes, and one side rib of them is embedded and welded in the V-shaped groove 201 pre-cut on the longitudinal beam 2, and the side rib opposite to this side rib supports the micro-channel tube group 402 of the manifold liquid cooling plate 4, and the micro-channel tube group 402 of the manifold liquid cooling plate 4 is suspended and fixed on the brazing fixture, thereby further solving the adhesion problem between the manifold liquid cooling plate 4 and the fixture; in addition, the provided support bars 8 can maintain the flatness of the manifold liquid cooling plate 4, and a counterweight block that can prevent the micro-channel tube group 402 from arching and deforming upward due to heat during brazing is added during brazing, which can prevent the micro-channel tube group 402 from deforming due to heat during brazing; thus, the problem of heat deformation of the manifold liquid cooling plate 4 during brazing is further solved, and the product quality of the manifold liquid cooling plate 4 is greatly improved.

[0029] As a preferred embodiment, the depth of the V-shaped groove 201 is less than half of the diagonal length of the cross-section of the support bar 8. In this way, while playing a fixing role, it is beneficial to adjust the flatness, and at the same time saves labor costs and time, ensuring that all parts of the manifold liquid cooling plate 4 are fully supported.

[0030] In this embodiment, a vertical insertion column 503 is further provided at the top of the support fixing seat. Support plates 9 are provided below both ends of the load-bearing cross beam 1, and insertion holes 901 for inserting the vertical insertion column 503 are provided on the support plates 9. With this design, the brazing special fixture for the manifold liquid cooling plate of the present invention can be stacked up, thereby realizing the batch brazing of the manifold liquid cooling plate 4, making full use of the space of the brazing furnace and facilitating the process turnover, greatly improving the production efficiency and at the same time reducing the production cost of the enterprise.

[0031] As a preferred embodiment, the brazing special fixture for the manifold liquid cooling plate further includes a handle 10 for carrying the brazing special fixture. The handle 10 is longitudinally arranged, and its two ends are connected to the support fixing seat, which is convenient for workers to use and carry the fixture, and is easy to operate with a simple design and remarkable effect.

[0032] As a preferred embodiment, the two load-bearing crossbeams 1 are made of angle steel. Angle steel has good support and heat resistance, and is not easily deformed due to thermal stress. It is the basis for ensuring that the flow-accumulating liquid-cooling plate 4 does not deform. The two load-bearing crossbeams 1 are placed horizontally with their apexes facing each other, and one side of the load-bearing crossbeam 1 is placed horizontally upward. Both ends of the two transverse fixing beams 3 and all the longitudinal beams 2 are welded to the vertical surfaces of the two load-bearing crossbeams 1, so as to ensure the load-bearing and supporting functions of the two load-bearing crossbeams 1. The support plates 9 at both ends of the load-bearing crossbeams 1 are also preferably made of angle steel with an L-shaped cross-section, which can prevent them from deforming due to heat while ensuring support.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. In addition, it should be understood that although this specification is described according to embodiments, it does not only contain one technical solution. The narrative manner of this specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A special brazing fixture for a flow-through liquid cooling plate, characterized in that: it includes a brazing fixture body, a support mechanism and a clamping mechanism; the brazing fixture body is used to support the flow-through liquid cooling plate, and it includes several longitudinals arranged in parallel and two load-bearing crossbeams connected to both ends of the longitudinals; the flow-through liquid cooling plate includes two manifold pipes and a plurality of microchannel pipe groups arranged in parallel and at equal intervals, and both ends of the microchannel pipe groups are respectively connected to the two manifold pipes; transverse fixing beams are provided on the inner sides of the load-bearing crossbeams, and transverse support rods for supporting both ends of the microchannel pipe groups are provided on the transverse fixing beams; the support mechanism is arranged at both ends of the load-bearing crossbeams and is used to support the corresponding manifold pipes; the clamping mechanism is used to clamp the manifold pipes; the support mechanism includes a support fixing seat fixed on the load-bearing crossbeam, and a plug-in short rod and a limit short rod which are arranged in parallel and can be inserted and pulled out movably are provided on the support fixing seat; the plug-in short rod is located below the limit short rod and is used to insert and transversely fix and support the manifold pipe, and the limit short rod is used to vertically limit and fix the manifold pipe; The clamping mechanism corresponding to each manifold pipe is divided into two groups, one group is installed on the outer side of the manifold pipe, and the other group is installed on the inner side of the manifold pipe; A number of support bars are also laid horizontally and at equal intervals between the longitudinals and the flow-through liquid cooling plate. The support bars are square steel pipes, and one side rib of them is embedded and welded in a V-shaped groove pre-cut on the longitudinal, and the side rib opposite to this side rib supports the microchannel pipe group of the flow-through liquid cooling plate; The depth of the V-shaped groove is less than half of the diagonal length of the cross-section of the support bar.

2. The special brazing fixture for a flow-through liquid cooling plate according to claim 1, characterized in that: There are several clamping mechanisms corresponding to each manifold pipe, and each clamping mechanism includes a clamping plate base, a clamping plate body and a central axis screw. The clamping plate base is fixed on the brazing fixture body, the central axis screw passes through the clamping plate body and installs it on the clamping plate base, and the clamping plate body can be rotated by rotating the central axis screw, so as to clamp or loosen the manifold pipe.

3. The special brazing fixture for a flow-through liquid cooling plate according to claim 1, characterized in that: The clamping mechanism on the outer side of the manifold pipe is fixed on the load-bearing crossbeam, the clamping mechanism on the inner side of the manifold pipe is fixed on the transverse support rod, and the clamping mechanism on the outer side is arranged opposite to the microchannel pipe group; the clamping mechanism on the inner side is located within the interval of the microchannel pipe group.

4. The special brazing fixture for a flow-through liquid cooling plate according to claim 1, characterized in that: A vertical plug-in column is also provided at the top of the support fixing seat, support plates are provided below both ends of the load-bearing crossbeam, and plug-in holes for the vertical plug-in column to insert are provided on the support plates.

5. The special brazing fixture for a flow-through liquid cooling plate according to claim 1, characterized in that: It also includes a handle for carrying the special brazing fixture. The handle is arranged longitudinally, and both ends of it are connected to the support fixing seat.

6. The special brazing fixture for a flow-through liquid cooling plate according to claim 1, characterized in that: The two load-bearing crossbeams are made of angle steel.

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