Heat pipe pressing assembly based on soft contact top rolling process

Abstract

The present invention discloses a heat dissipation pipe pressing assembly based on a soft contact top rolling process, comprising an upper force cylinder, a lower force cylinder, a rolling assembly, a buffer positioning platform and a rolling fixture for positioning and clamping the heat dissipation pipe to be flattened, the rolling assembly comprising an upper rolling assembly and a lower rolling assembly, the rolling assembly comprising a force shaft, a rolling bracket, a rolling shaft, a rolling roller, a transmission assembly, and a buffer assembly for adjusting the top angle and soft contact with the heat dissipation pipe, the buffer positioning platform comprising a gas spring and a positioning slide rail, the rolling fixture is provided with a through groove for forming a flat heat dissipation pipe, and a positioning spring pin is provided on the inner side wall of the through groove, the pressing assembly uses the force cylinder to apply pressure to the rolling assembly at the same time, and applies pressure to the heat dissipation pipe at the same time and with the same force; a soft contact method is adopted to realize synchronous and uniform pressing action, and the force is evenly applied to prevent the heat dissipation pipe from instantaneously deforming and causing defects; the defects in the rolling process are effectively improved, and the heat dissipation pipe flattening yield rate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic product radiators, and in particular to a heat dissipation pipe pressing assembly based on a soft-contact top-to-top flattening process. Background Art

[0002] As electronic products become more intelligent and convenient, laptops have become indispensable tools for work, home, and travel. As laptops become increasingly integrated and their high-performance chip components generate increasing heat, the performance requirements for heat sinks continue to rise, especially in terms of the thermal conductivity of heat pipes, and production quality control is becoming more stringent. Heat pipes are typically filled with thermal conductive fluid. To accommodate a larger area of ​​heat pipe material within the limited motherboard space, the heat pipes need to be flattened and rolled. This flattened heat pipe must be extremely flat, otherwise it will affect the vaporization and liquefaction flow rates of the thermal conductive fluid within the pipe, limiting its thermal conductivity.

[0003] The traditional flattening process is to place the cylindrical heat pipe in a specific jig with a groove on the lower end and an open upper end, and then use a roller to flatten it to obtain the flattened heat pipe. This has a better flattening effect for straight heat pipes, but for heat pipes with curved configurations, it is placed in a jig. Figure 8 , it is easy to cause cracks, tears and other defects due to uneven force at the bend. The best solution is to apply force to the upper and lower end surfaces at the same time. The force direction is controllable and extensible, which greatly alleviates the uneven force on the heat pipe during the flattening process, causing stress concentration in the structure and leading to cracks. For this reason, it is necessary to design a process equipment that can apply force to the upper and lower end surfaces of the heat pipe at the same time, synchronously, at the same speed and with the same force to improve the defects in the flattening process and improve the flattening yield of the heat pipe. Summary of the Invention

[0004] Purpose of the present invention: In view of the fact that the existing flattening and rolling process used in the background technology is to place a cylindrical heat dissipation tube in a specific jig with a groove on the lower end face and an opening on the upper end face, and to flatten it by a pressing roller, so as to obtain a flattened heat dissipation tube. This has a better flattening effect for straight heat dissipation tubes, but for heat dissipation tubes with a bent configuration, when placed in a jig, it is easy to cause cracks, tears and other defects due to uneven force at the bend. We design a heat dissipation tube pressing assembly based on a soft contact top-to-top flattening process, which can apply force to flatten the upper and lower end faces of the heat dissipation tube simultaneously, synchronously, at the same speed and with the same force, so as to improve the defects in the flattening process and improve the flattening yield of the heat dissipation tube.

[0005] The technical solutions adopted to solve the above problems are:

[0006] A heat pipe pressing assembly based on a soft contact top-to-top flattening process comprises an upper force cylinder fixed on a support frame, a lower force cylinder fixed on a workbench, flattening assemblies symmetrically arranged in upper and lower positions, a buffer positioning platform, and a flattening fixture for positioning and clamping the heat pipe to be flattened.

[0007] The flattening assembly includes an upper flattening assembly and a lower flattening assembly. The upper flattening assembly is fixedly connected to the push rod of the upper force cylinder and is used to roll down and flatten the upper end surface of the heat dissipation pipe on the jig. The lower flattening assembly is fixedly connected to the push rod of the lower force cylinder and is used to roll up and flatten the lower end surface of the heat dissipation pipe on the jig.

[0008] The flattening assembly includes a force-bearing shaft, a U-shaped flattening bracket, a flattening shaft, a flattening roller, a transmission assembly, and a buffer assembly for adjusting the top angle and soft contact with the heat dissipation pipe. The force-bearing shaft is fixedly connected to the top rod, and the force-bearing shaft is fixedly connected to the flattening bracket as a whole. Both ends of the flattening bracket are provided with waist-shaped holes, which are sleeved with the horizontal axis holes of the flattening shaft. The flattening shaft is sleeved with the axis holes of the flattening roller. The flattening roller is arranged in the middle of the flattening bracket, and the flattening roller faces the upper end face or the lower end face of the heat dissipation pipe. The transmission assembly is a transmission motor principle structure, including a stator part arranged in the middle of the flattening shaft and a rotor part arranged on the cylindrical inner wall of the flattening roller. When the stator part is energized, the rotor part rotates to actively roll on the upper and lower end faces of the heat dissipation pipe. The buffer assembly includes adjustment screws, buffer springs and buffer pressure rods symmetrically arranged on both sides of the flattening bracket.

[0009] The buffer positioning platform is symmetrically arranged on both sides of the flattening assembly, including gas springs and positioning rails arranged symmetrically up and down. The upper and lower end surfaces of the positioning rails are fixedly connected to the top rods of the gas springs, and the gas springs at the upper and lower positions jointly push to maintain balance. The inner side of the positioning rail is provided with a sliding groove that slides with the side of the flattening fixture.

[0010] A through slot for forming a flat heat dissipation pipe is provided in the middle of the flattening fixture, and positioning spring pins are evenly arranged at intervals on the inner sidewall of the through slot. The positioning spring pins face the outer wall of the heat dissipation pipe to clamp and position the heat dissipation pipe.

[0011] Furthermore, the adjusting screw is threadedly engaged with the threaded hole opened in the flattening bracket, and cooperates with the buffer spring to push the buffer pressure rod to the outer periphery of the shaft head of the flattening shaft, which is used to press the shaft head of the flattening shaft, and push back to buffer when the flattening roller is subjected to the reaction force of the heat dissipation pipe, thereby protecting the heat dissipation pipe structure.

[0012] Furthermore, the shaft heads at both ends of the flattening roller are screwed and positioned by locking nuts and washers, and can slide up and down in the waist-shaped holes.

[0013] Furthermore, a bearing is provided between the flattening roller and the flattening shaft.

[0014] Furthermore, the gas spring can be replaced by a tension spring to pull the positioning rail to maintain balance.

[0015] Furthermore, the positioning slide rail is limited in the horizontal and vertical directions by a slider slide rail assembly arranged in a vertical manner.

[0016] Furthermore, a horizontal positioning pin is provided on the side of the slide groove facing the flattening jig, and the positioning pin is pushed and strengthened by a positioning spring to clamp and position the flattening jig toward the center.

[0017] Furthermore, the rear end of the positioning pin is equipped with a push spring to tightly press the positioning pin, and the front end of the positioning pin is provided with a cylindrical curved surface, which is in close contact with the outer wall of the heat dissipation pipe.

[0018] Furthermore, semi-cylindrical grooves are provided on both sides of the inner wall of the through groove to support the flattened heat dissipation tube without over-pressure and facilitate shaping. The upper end of the semi-cylindrical groove on one side of the through groove is open to facilitate the removal and blanking of the flattened heat dissipation tube.

[0019] The beneficial effects of the present invention are:

[0020] 1. The heat pipe pressing assembly based on the soft contact top rolling process uses a force cylinder to apply pressure to the rolling assembly and to the heat pipe at the same time and with the same force;

[0021] 2. Driven by the transmission assembly, the heat dissipation tube is rolled and continuously rolled, and the heat dissipation tube is fully flattened and shaped in the flattening jig;

[0022] 3. The soft contact method can achieve synchronous and uniform pressing action, uniform force, and prevent the heat dissipation pipe from instantaneous deformation and causing defects;

[0023] 4. The positioning slide rail with elastic lifting action can effectively release the internal stress concentration of the heat dissipation pipe after being crushed, and evenly distribute the force;

[0024] 5. This design effectively improves the defects in the flattening process and improves the yield rate of heat pipe flattening. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the heat pipe pressing assembly based on the soft contact top rolling process of this embodiment;

[0026] Figure 2 This is a side plan view of the rolling assembly described in this embodiment;

[0027] Figure 3 is a cross-sectional view of the rolling assembly described in this embodiment;

[0028] Figure 4 for Figure 1A partial enlarged view of point A in the middle;

[0029] Figure 5 for Figure 1 A partial enlarged view of point B in the middle;

[0030] Figure 6 Schematic diagram of the structure of the flattening jig according to this embodiment;

[0031] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0032] Figure 8 Schematic diagram of the structure of the flattening jig for the bent heat pipe according to this embodiment;

[0033] Figure 9 This is a schematic diagram of the structure of the heat dissipation pipe after being flattened according to this embodiment;

[0034] Figure 10 This is a schematic diagram of the process of removing and cutting the heat dissipation pipe after it has been flattened;

[0035] Among them, 1-lower force cylinder, 2-lower gas spring, 3-lower flattening assembly, 4-buffer positioning platform, 5-gas spring push rod, 6-upper gas spring, 7-upper force cylinder, 8-force shaft, 9-upper flattening assembly, 10-flattening fixture, 11-support frame, 12-adjusting screw, 13-flattening bracket, 14-flattening roller, 15-locking nut, 16-buffer spring, 17-buffer pressure rod, 18-flattening shaft, 19-bearing, 20-rotor part, 21-stator part, 22-positioning spring, 23-positioning ejector, 24-heat dissipation pipe, 25-push spring, 26-positioning pin, 27-semi-cylindrical groove on the left, 28-semi-cylindrical groove, 29-through groove, 30-flat heat dissipation pipe, 31-heat dissipation pipe for blanking. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely in the following by way of embodiments with reference to the accompanying drawings.

[0037] See also Figure 1-10 This embodiment proposes a heat pipe pressing assembly based on a soft contact top-to-top flattening process, including an upper force cylinder 7 fixed on a support frame 11, a lower force cylinder 1 fixed on a workbench, a flattening assembly symmetrically arranged in the upper and lower positions, a buffer positioning platform 4, and a flattening fixture 10 for positioning and clamping the heat pipe 24 to be flattened.

[0038] Specifically, see Figure 1The flattening assembly includes an upper flattening assembly 9 and a lower flattening assembly 3. The upper flattening assembly 9 is fixedly connected to the top rod of the upper force cylinder 7 and is used to roll down and flatten the upper end surface of the heat dissipation pipe 24 on the jig 10. The lower flattening assembly 3 is fixedly connected to the top rod of the lower force cylinder 1 and is used to roll up and flatten the lower end surface of the heat dissipation pipe 24 on the jig 10. Figure 2 and Figure 3 The flattening assembly includes a force-bearing shaft 8, a U-shaped flattening bracket 13, a flattening shaft 18, a flattening roller 14, a transmission assembly, and a buffer assembly for adjusting the top angle and soft contact with the heat dissipation pipe 24. The force-bearing shaft 8 is fixedly connected to the top rod, and the force-bearing shaft 8 is fixedly connected to the flattening bracket 13 as a whole. Both ends of the flattening bracket 13 are provided with waist-shaped holes to facilitate the movement of the flattening shaft within a limited distance in the vertical direction, and cooperate with the horizontal axis hole of the flattening shaft 18 through the sleeve. The flattening shaft 18 is sleeved with the axis hole of the flattening roller 14. The flattening roller 14 is arranged in the middle of the flattening bracket 13, and the flattening roller 14 is facing the upper end face or the lower end face of the heat dissipation pipe 24. The transmission assembly is a transmission motor principle structure (belonging to the principle of existing technology). ), including a stator part 21 arranged in the middle of the flattening shaft 18 and a rotor part 20 arranged on the cylindrical inner wall of the flattening roller 14. When the stator part 21 is energized, the rotor part 20 rotates to actively roll on the upper and lower end surfaces of the heat dissipation tube 24. The buffer assembly includes an adjusting screw 12, a buffer spring 16 and a buffer pressure rod 17 symmetrically arranged on both sides of the flattening bracket 13. The adjusting screw 12 is screwed into the threaded hole opened in the flattening bracket 13, and cooperates with the buffer spring 16 to push the buffer pressure rod 17 to the outer periphery of the shaft head of the flattening shaft 18, which is used to press the shaft head of the flattening shaft 18, and push back to buffer when the flattening roller 14 is subjected to the reaction force of the heat dissipation tube 24, thereby protecting the structure of the heat dissipation tube 24.

[0039] See Figure 4 The buffer positioning platform 4 is symmetrically arranged on both sides of the flattening assembly, including gas springs and positioning slides arranged symmetrically up and down. The upper and lower end surfaces of the positioning slides are fixedly connected to the top rods 5 of the gas springs, and the gas springs at the upper and lower positions jointly push to maintain balance. The inner side of the positioning slide is provided with a slide groove that cooperates with the side sliding of the flattening fixture 10.

[0040] See Figure 5 A through slot 29 for forming a flat heat dissipation tube 30 is opened in the middle of the flattening jig 10, and positioning spring pins 26 are evenly spaced on the inner wall of the through slot 29. The positioning spring pins 26 face the outer wall of the heat dissipation tube 24 to clamp the heat dissipation tube 24 in place.

[0041] A further embodiment is to refer to Figure 3 The shaft heads at both ends of the flattening roller 14 are screwed and positioned by locking nuts 15 and washers, and can slide up and down in the waist-shaped hole.

[0042] A further embodiment is to refer to Figure 3 A bearing 19 is provided between the flattening roller 14 and the flattening shaft 18 .

[0043] As a further alternative, the gas spring may be replaced by a tension spring to pull the positioning rail to maintain balance.

[0044] A further embodiment is that the positioning slide rail is limited in the horizontal and vertical directions by a slider slide rail assembly (not shown in the figure) arranged in a vertical manner.

[0045] A further embodiment is to refer to Figure 4 A horizontal positioning pin 23 is provided in the chute on the side facing the flattening jig 10. The positioning pin 23 is pushed by the positioning spring 22 to clamp the flattening jig 10 toward the center.

[0046] A further embodiment is to refer to Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 The rear end of the positioning pin 26 is equipped with a push spring 25 to tightly press the positioning pin 26. The front end of the positioning pin 26 is provided with a cylindrical surface, which is close to the outer wall of the heat dissipation pipe 24.

[0047] A further embodiment is to refer to Figure 9 and Figure 10 Semi-cylindrical grooves 28 are provided on both sides of the inner wall of the through groove 29 to support the flattened heat dissipation tube 30 without over-pressure and to facilitate shaping. The upper end of the semi-cylindrical groove 28 on one side of the through groove 29 is open, which is convenient for removing and cutting the flattened heat dissipation tube 30.

[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes, modifications, substitutions and variations can be made within the scope of knowledge possessed by ordinary technicians in this field without departing from the spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A heat pipe pressing assembly based on a soft contact top-to-top flattening process, characterized by: It includes an upper force cylinder fixed on a support frame, a lower force cylinder fixed on a workbench, a flattening assembly symmetrically arranged in upper and lower positions, a buffer positioning platform, and a flattening fixture for positioning and clamping the heat pipe to be flattened. The flattening assembly includes an upper flattening assembly and a lower flattening assembly. The upper flattening assembly is fixedly connected to the push rod of the upper force cylinder and is used to roll down and flatten the upper end surface of the heat dissipation pipe on the jig. The lower flattening assembly is fixedly connected to the push rod of the lower force cylinder and is used to roll up and flatten the lower end surface of the heat dissipation pipe on the jig. The flattening assembly includes a force-bearing shaft, a U-shaped flattening bracket, a flattening shaft, a flattening roller, a transmission assembly, and a buffer assembly for adjusting the top angle and soft contact with the heat dissipation pipe. The force-bearing shaft is fixedly connected to the top rod, and the force-bearing shaft is fixedly connected to the flattening bracket as a whole. Both ends of the flattening bracket are provided with waist-shaped holes, which are sleeved with the horizontal axis holes of the flattening shaft. The flattening shaft is sleeved with the axis holes of the flattening roller. The flattening roller is arranged in the middle of the flattening bracket, and the flattening roller is facing the upper end face or the lower end face of the heat dissipation pipe. The buffer assembly includes adjustment screws, buffer springs and buffer pressure rods symmetrically arranged on both sides of the flattening bracket. The transmission assembly is a transmission motor principle structure, including a stator part arranged in the middle of the flattening shaft and a rotor part arranged on the cylindrical inner wall of the flattening roller. When the stator part is energized, the rotor part rotates to actively roll on the upper and lower end surfaces of the heat dissipation pipe; The buffer positioning platform is symmetrically arranged on both sides of the flattening assembly, including gas springs and positioning rails arranged symmetrically up and down. The upper and lower end surfaces of the positioning rails are fixedly connected to the top rods of the gas springs, and the gas springs at the upper and lower positions jointly push to maintain balance. The inner side of the positioning rail is provided with a sliding groove that slides with the side of the flattening fixture. A through slot for forming a flat heat dissipation pipe is provided in the middle of the flattening fixture, and positioning spring pins are evenly arranged at intervals on the inner sidewall of the through slot. The positioning spring pins face the outer wall of the heat dissipation pipe to clamp and position the heat dissipation pipe.

2. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: The adjusting screw is threadedly engaged with the threaded hole provided on the rolling bracket, and cooperates with the buffer spring to push the buffer pressure rod to the outer periphery of the shaft head of the rolling shaft, pressing the shaft head of the rolling shaft.

3. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: The shaft heads at both ends of the flattening roller are screwed and positioned by locking nuts and washers, and can slide up and down in the waist-shaped holes.

4. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: A bearing is provided between the flattening roller and the flattening shaft.

5. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: The gas spring can be replaced by a tension spring to pull the positioning slide rail to maintain balance.

6. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: The positioning slide rail is limited in the horizontal and vertical directions by a slider and slide rail assembly arranged in a vertical manner.

7. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: A horizontal positioning pin is provided on the side of the slide groove facing the flattening jig. The positioning pin is pushed and strengthened by a positioning spring to clamp and position the flattening jig toward the center.

8. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: The rear end of the positioning elastic pin is matched with a push spring to tightly press the positioning elastic pin, and the front end of the positioning elastic pin is provided with a cylindrical curved surface, which is in close contact with the outer wall of the heat dissipation pipe.

9. The heat pipe pressing assembly based on the soft contact top-to-top flattening process according to claim 1 is characterized in that: Semi-cylindrical grooves are provided on both sides of the inner wall of the through groove, and the upper end of the semi-cylindrical groove on one side of the through groove is open.

Images