Aluminum alloy die-casting heat sink brazing device

Abstract

The present invention discloses a device for brazing heat sinks of aluminum alloy die castings, comprising a clamping assembly, a rotating platform, a base, and a brazing manipulator; the rotating platform is symmetrically provided with two clamping assemblies; the clamping assembly comprises a fixed rod, a rod body of the fixed rod having a through slot, a movable plate pinned in the through slot, one end of the movable plate being connected to a pressure plate via a spring, an adjusting screw being screwed to the rod body of the fixed rod, a connecting rod being provided in the through slot of the fixed rod, one end of the connecting rod having a connecting plate, a plate surface of the connecting plate being slidably engaged with two clamping plates, a steel wire rope being connected between the two clamping plates, the middle portion of the steel wire rope passing through the through slot of the fixed rod and connected to the other end of the movable plate. The present invention can quickly complete the precise positioning and clamping operation between the heat sink and the aluminum alloy die casting, greatly improving assembly efficiency and welding accuracy, being applicable to heat sinks and die castings of different sizes, and having good versatility and flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of brazing, in particular to a brazing device for a heat sink of an aluminum alloy die-casting. Background Art

[0002] As the requirements for heat dissipation performance of modern electronic equipment and industrial products continue to increase, the connection quality between aluminum alloy die-castings and heat sinks becomes particularly important. Among them, brazing, as a common connection process, is widely used in the manufacture of such structures. For example, the patent with authorization announcement number CN210498706U discloses a high-frequency brazing heat sink, which includes a die-casting and a heat sink. The heat sink includes an extruded profile or a cold-forged component. The die-casting and the heat sink are fixed to each other by brazing. The brazing material is distributed at the edge where the die-casting and the heat sink are fixed to each other, forming a sealing connection filler layer along the edge of the die-casting and the heat sink.

[0003] Existing brazing methods mostly use manual operation or semi-automatic equipment for welding, which has problems such as low efficiency, poor welding accuracy, and difficulty in ensuring consistency. Especially when welding complex structures or combinations of die-castings and heat sinks of different specifications, multiple clamping or manual adjustments are often required. In addition, the positioning and clamping are not precise enough, which can easily lead to defects such as welding position offset and insufficient joint strength, affecting the overall performance and service life of the product, and further reducing production efficiency and welding quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide an aluminum alloy die-casting heat sink brazing device, which can quickly complete the precise positioning and clamping operations between the heat sink and the aluminum alloy die-casting, greatly improving the assembly efficiency and welding accuracy, and can be applied to heat sinks and die-castings of different sizes and specifications. It has good versatility and flexibility and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device for brazing heat sinks of aluminum alloy die-castings, comprising a clamping assembly, a rotating platform, a base and a brazing manipulator; a rotating platform and a brazing manipulator are provided on the upper portion of the base, and two clamping assemblies are symmetrically provided on the rotating platform; the clamping assembly includes a fixing rod, a rod body of the fixing rod is provided with a through slot, a movable plate is pinned in the through slot, one end of the movable plate is connected to a pressure plate for pressing the aluminum alloy die-casting on the aluminum alloy die-casting through a spring, the rod body of the fixing rod is screwed with an adjusting screw that resists the movable plate; a connecting rod is also provided at one end of the connecting rod, a connecting plate is slidably fitted on the plate surface of the connecting plate, two clamps for positioning and fixing the side surfaces of the heat sink are connected between the two clamps, a steel wire rope is connected between the two clamps, the middle of the steel wire rope passes through the through slot of the fixing rod and is connected to the other end of the movable plate; the brazing manipulator comprises a three-axis robotic arm, which is connected to a laser brazing head that emits a laser beam to irradiate the junction of the aluminum alloy die-casting and the heat sink.

[0006] Preferably, the rod body of the connecting rod is threadedly connected to two nuts, the two nuts are located on both sides of the through slot of the fixing rod, and the connecting rod is connected to the connecting plate through a spring.

[0007] Preferably, two fixing rings are symmetrically provided on the upper side of the connecting plate about its center, and the steel wire rope passes through the two fixing rings. A fixing ring is provided at the lower part of one end of the movable plate, and the middle part of the steel wire rope passes through the fixing ring.

[0008] Preferably, the rod body of the fixing rod is further threadedly connected with a tightening screw rod for positioning the aluminum alloy die-casting, and a rubber block is provided at the end of the tightening screw rod.

[0009] Preferably, the rotating platform includes a servo motor, the servo motor is fixed on the base, and the output end of the servo motor is provided with a tooling platform.

[0010] Preferably, a positioning block for positioning the side of the aluminum alloy die-casting is provided on the upper portion of the tooling platform.

[0011] Preferably, the tooling platform is provided with a long slot, the fixing rod passes through the long slot, and the rod body of the fixing rod is threadedly connected to two nuts, and the two nuts are located at the upper and lower parts of the tooling platform.

[0012] Preferably, the three-axis robotic arm includes an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, and the X-axis moving mechanism, the Y-axis moving mechanism and the Z-axis moving mechanism are all screw-nut kinematic pairs driven by servo motors.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by providing a clamping assembly, combined with the coordinated action of components such as an adjusting screw, a movable plate, a pressure plate, a connecting rod, a clamping plate, and a wire rope, the freedom of the heat sink in the XYZ directions can be restricted by turning the adjusting screw, thereby quickly completing the precise positioning and clamping operation between the heat sink and the aluminum alloy die-casting, greatly improving assembly efficiency and welding accuracy, and being applicable to heat sinks and die-castings of different sizes and specifications, with good versatility and flexibility. In summary, the present invention has efficient positioning and clamping, precise positioning, and strong adaptability, and is particularly suitable for efficient, high-quality laser brazing operations between various types of aluminum alloy die-castings and heat sinks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0016] Figure 3 This is a schematic structural diagram of the clamping assembly of the present invention;

[0017] Figure 4 Schematic diagram of the three-axis robotic arm structure of the present invention.

[0018] In the picture:

[0019] 1. Clamping assembly, 1.1 fixing rod, 1.2 adjusting screw, 1.3 movable plate, 1.4 pressure plate, 1.5 connecting rod, 1.6 tightening screw, 1.7 connecting plate, 1.8 wire rope, 1.9 clamping plate;

[0020] 2 rotating platform, 2.1 servo motor, 2.2 tooling platform, 2.3 positioning block, 2.4 long slot;

[0021] 3 base;

[0022] 4. Brazing robot, 4.1 three-axis robot arm, 4.2 laser brazing head. DETAILED DESCRIPTION

[0023] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0024] See also Figure 1-4 , the present invention provides the following technical solutions:

[0025] Example 1: A device for brazing heat sinks of aluminum alloy die castings, comprising a clamping assembly 1, a rotating platform 2, a base 3, and a brazing manipulator 4; the upper portion of the base 3 is provided with a rotating platform 2 and a brazing manipulator 4, and two clamping assemblies 1 are symmetrically provided on the rotating platform 2; the clamping assembly 1 comprises a fixed rod 1.1, the rod body of the fixed rod 1.1 is provided with a through slot, a movable plate 1.3 is pinned in the through slot, one end of the movable plate 1.3 is connected to a pressing plate 1.4 for pressing the heat sink onto the aluminum alloy die casting via a spring, and the rod body of the fixed rod 1.1 is screwed with an adjusting screw that contacts the movable plate 1.3 The screw rod 1.2 and the through slot of the fixed rod 1.1 are further provided with a connecting rod 1.5, one end of which is provided with a connecting plate 1.7. The plate surface of the connecting plate 1.7 is slidably engaged with two clamping plates 1.9 for positioning and fixing the side surfaces of the heat sink. A steel wire rope 1.8 is connected between the two clamping plates 1.9. The middle portion of the steel wire rope 1.8 passes through the through slot of the fixed rod 1.1 and is connected to the other end of the movable plate 1.3. The brazing robot 4 includes a three-axis robot arm 4.1, which is connected to a laser brazing head 4.2 that emits a laser beam to irradiate the joint between the aluminum alloy die-casting and the heat sink.

[0026] The fins are then positioned so that the fins can be fixed to the fins by means of the clamping assembly 1. The fins are then positioned so that the fins can be fixed to the fins by means of the clamping assembly 1.

[0027] Specifically, the three-axis robotic arm 4.1 includes an X-axis moving mechanism, a Y-axis moving mechanism, and a Z-axis moving mechanism, each of which is a screw-nut kinematic pair driven by a servo motor;

[0028] It should be noted that the movable plate 1.3 is connected to the pressure plate 1.4 via a spring. The spring is provided to increase the margin. For example, when the movable plate 1.3 is swinging, the pressure plate 1.4 has already pressed and fixed the upper part of the heat sink, while the two clamping plates 1.9 have not yet clamped and fixed the sides of the heat sink. The movable plate 1.3 needs to continue to swing. At this time, the spring is compressed to avoid hard squeezing and damaging the heat sink.

[0029] Furthermore, the rod body of the fixing rod 1.1 is also threadedly connected with a tightening screw rod 1.6 for positioning the aluminum alloy die casting. A rubber block is provided at the end of the tightening screw rod 1.6, and the aluminum alloy die casting is tightened and fixed by the tightening screw rod 1.6.

[0030] Example 2: Different from Example 1, the rod body of the connecting rod 1.5 is threadedly connected to two nuts, which are located on both sides of the through slot of the fixing rod 1.1. The connecting rod 1.5 is adjusted by screwing the two nuts. The connecting rod 1.5 is connected to the connecting plate 1.7 through a spring to increase elastic deformation and avoid hard extrusion to damage the heat sink.

[0031] Example 3: Different from Example 1, two fixing rings are symmetrically provided on the upper side of the connecting plate 1.7 about its center, and the wire rope 1.8 passes through the two fixing rings. A fixing ring is provided at the lower part of one end of the movable plate 1.3, and the middle part of the wire rope 1.8 passes through the fixing ring to limit the moving trajectory of the wire rope 1.8, that is, the wire rope 1.8 passes through the fixing ring at the lower end of the movable plate 1.3, and then the two ends of the wire rope 1.8 respectively pass through the two fixing rings on the connecting plate 1.7 and are respectively connected to the two splints 1.9.

[0032] Example 4: Unlike Example 1, the rotating platform 2 includes a servo motor 2.1, which is fixed to the base 3. The output end of the servo motor 2.1 is provided with a tooling platform 2.2. The servo motor 2.1 drives the tooling platform 2.2 to rotate, and the tooling platform 2.2 rotates to switch the brazing position of the aluminum alloy die casting and the heat sink;

[0033] Furthermore, a positioning block 2.3 for positioning the side of the aluminum alloy die casting is provided on the upper part of the tooling platform 2.2;

[0034] In addition, the tooling platform 2.2 is provided with a long slot 2.4, through which the fixing rod 1.1 passes, and the rod body of the fixing rod 1.1 is threadedly connected to two nuts, which are located at the upper and lower parts of the tooling platform 2.2. The fixing rod 1.1 can be moved to adjust the position of the clamping assembly 1 according to the aluminum alloy die-casting and the heat sink.

[0035] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the content of the present invention.

Claims

1. A brazing device for heat sinks of aluminum alloy die castings, characterized by: The invention comprises a clamping assembly (1), a rotating platform (2), a base (3) and a brazing manipulator (4); the upper part of the base (3) is provided with a rotating platform (2) and a brazing manipulator (4); two clamping assemblies (1) are symmetrically provided on the rotating platform (2); the clamping assembly (1) comprises a fixed rod (1.1); the rod body of the fixed rod (1.1) is provided with a through slot; a movable plate (1.3) is pinned in the through slot; one end of the movable plate (1.3) is connected to a pressing plate (1.4) for pressing a heat sink onto an aluminum alloy die-casting through a spring; the rod body of the fixed rod (1.1) is screwed with an adjusting screw (1.2) that contacts the movable plate (1.3); the through slot of the fixed rod (1.1) is further provided with a connecting rod (1.5); one end of the connecting rod (1.5) is provided with a connecting plate (1 .7), the plate surface of the connecting plate (1.7) is slidably matched with two clamping plates (1.9) for positioning and fixing the side surfaces of the heat sink, a steel wire rope (1.8) is connected between the two clamping plates (1.9), the middle part of the steel wire rope (1.8) passes through the through slot of the fixing rod (1.1) and is connected to the other end of the movable plate (1.3); the upper side of the connecting plate (1.7) is symmetrically provided with two fixing rings about its center, the steel wire rope (1.8) passes through the two fixing rings, the lower part of one end of the movable plate (1.3) is provided with a fixing ring, the middle part of the steel wire rope (1.8) passes through the fixing ring; the brazing manipulator (4) includes a three-axis manipulator (4.1), the three-axis manipulator (4.1) is connected to a laser brazing head (4.2) that emits a laser beam to radiate the joint between the aluminum alloy die-casting and the heat sink.

2. The aluminum alloy die casting heat sink brazing device according to claim 1, characterized in that: The connecting rod (1.5) is threadedly connected to two nuts, which are located on both sides of the through slot of the fixing rod (1.1). The connecting rod (1.5) is connected to the connecting plate (1.7) via a spring.

3. The aluminum alloy die casting heat sink brazing device according to claim 1, characterized in that: The rod body of the fixing rod (1.1) is also threadedly connected to a tightening screw rod (1.6) for positioning the aluminum alloy die-casting, and a rubber block is provided at the end of the tightening screw rod (1.6).

4. The aluminum alloy die casting heat sink brazing device according to claim 1, characterized in that: The rotating platform (2) comprises a servo motor (2.1), the servo motor (2.1) is fixed on a base (3), and a tooling platform (2.2) is provided at the output end of the servo motor (2.1).

5. The aluminum alloy die casting heat sink brazing device according to claim 4, characterized in that: A positioning block (2.3) for positioning the side of the aluminum alloy die-casting is provided on the upper part of the tooling platform (2.2).

6. The aluminum alloy die casting heat sink brazing device according to claim 4, characterized in that: The tooling platform (2.2) is provided with a long slot, the fixing rod (1.1) passes through the long slot, and the rod body of the fixing rod (1.1) is threadedly connected to two nuts, which are located at the upper and lower parts of the tooling platform (2.2).

7. The aluminum alloy die casting heat sink brazing device according to claim 1, characterized in that: The three-axis robotic arm (4.1) comprises an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, wherein the X-axis moving mechanism, the Y-axis moving mechanism and the Z-axis moving mechanism are all screw-nut kinematic pairs driven by servo motors.

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