A copper tube pre-forming die and a pre-forming method

Abstract

The application provides a copper pipe pre-molding die and a pre-molding method, the die is used for molding a copper pipe into a D-shaped structure, the D-shaped structure is that the upper surface of the cross section of the copper pipe is a plane and the lower surface is a curved surface, the die comprises a lower die base, a die core, a floating core and an upper die base, the die core is fixed on the lower die base, the floating core is arranged in the die core, the floating core can float up and down within a certain distance relative to the front surface of the lower die base, a spring is arranged between the floating core and the lower die base, a D-shaped cavity is formed on the die core and the floating core, and the D-shaped cavity is used for mounting the copper pipe to be molded. The application solves the assembly scheme of the D-shaped copper pipe based on the alumina ceramic substrate, the copper pipe does not need to be crimped and molded in the alumina ceramic substrate, and the molded D-shaped copper pipe can be easily assembled into the alumina ceramic substrate and then solidified by epoxy resin.

Description

Technical Field

[0001] This invention mainly relates to the technical field of copper tube plastic deformation process, specifically a copper tube pre-forming mold and pre-forming method. Background Technology

[0002] Traditional copper tube liquid cooling radiators use aluminum alloy as the substrate, which has high strength and is not easily deformed. The processing method is as follows: the outer diameter and shape of the copper flow channel are pre-processed on the substrate, and then the copper tube is pressed into the flow channel in a D-shape by a press to increase the heat dissipation contact area. Epoxy resin is used to fill the gaps and air bubbles, thereby achieving the combination of copper tube and aluminum alloy substrate to achieve the best heat dissipation effect.

[0003] For copper tube liquid-cooled radiators used in specific electromagnetic radiation environments (such as MRI equipment), the strong electromagnetic radiation generated by the medical MRI equipment during operation means that the conductivity of the metal substrate radiator would generate a large number of electromagnetic eddy currents, significantly affecting the imaging quality and lifespan of the equipment. While alumina ceramics possess excellent insulation and radiation resistance, making them suitable as a substrate for heat dissipation in electromagnetic environments, their extreme brittleness prevents the interference fit of copper tubes or even their shaping into a D-shape. This severely limits the application of alumina ceramic substrates in copper tube radiators. Summary of the Invention

[0004] To address the shortcomings of current technologies, this invention, based on existing technologies and practical applications, provides a copper tube pre-forming mold and pre-forming method. This invention solves the problem of easily achieving an assembly solution for D-shaped copper tubes on an alumina ceramic substrate, eliminating the need for pressing and shaping copper tubes within the alumina ceramic substrate. The shaped D-shaped copper tube can be easily inserted into the alumina ceramic substrate and cured with epoxy resin.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] According to one aspect of the present invention, a copper tube pre-shaping mold is provided, the mold being used to shape the copper tube into a D-shaped cross-section, wherein the D-shape is such that the upper surface of the copper tube cross-section is a plane and the lower surface is an arc surface, characterized in that the mold comprises: a lower mold base, a mold core, a floating core and an upper mold base;

[0007] The mold core is fixed on the lower mold base, and the floating core is disposed inside the mold core. The floating core can float up and down within a certain distance relative to the front of the lower mold base. A spring is provided between the floating core and the lower mold base to push the floating core upward a certain distance. A D-shaped cavity is formed on the mold core and the floating core together. The copper tube to be shaped is installed in the D-shaped cavity. The upper mold base is used to apply force to the copper tube so that the copper tube is shaped in the D-shaped cavity.

[0008] Furthermore, a semi-D-shaped cavity is provided on the mold core, and a semi-D-shaped cavity is provided on the float core. The semi-D-shaped cavity of the mold core and the semi-D-shaped cavity of the float core together form a D-shaped cavity for shaping the copper tube.

[0009] Furthermore, the bottom of the float core is connected to an equal-height screw, which is slidably engaged with the lower mold base. A corresponding limiting step is provided between the equal-height screw and the lower mold base to limit the floating distance of the float core.

[0010] Furthermore, a positioning block is provided on one side of the mold core, the positioning block is fixed on the lower mold base, and the positioning block is provided with a positioning groove for positioning the copper tube.

[0011] Furthermore, both the mold core and the positioning block are fixed to the lower mold base by screws.

[0012] Furthermore, there are multiple springs, arranged in multiple rows side by side.

[0013] According to another aspect of the present invention, a pre-forming method using the above-described copper tube pre-forming mold is provided, the method comprising: assembling a lower mold base, a mold core, and a floating core to form a lower mold structure; and placing the copper tube to be shaped into a positioning groove in a positioning block;

[0014] Close the upper mold base and place the mold on the hydraulic press working platform; set a certain pressure to press the mold together with the copper tube to the mold core fiber limit position, and the copper tube creeps into the pre-made D-shaped cavity in the mold core and float core, thereby obtaining the shaped D-shaped copper tube.

[0015] The beneficial effects of this invention are:

[0016] This invention solves the problem of easily realizing D-shaped copper tubes on alumina ceramic substrate. Figure 1 The assembly-type solution eliminates the need for pressing and shaping copper tubes. When using this mold, the copper tube can be shaped into a D-shape after the mold is closed by a press, and it can be easily removed without causing other deformations to the copper tube. The shaped D-shaped copper tube can be easily inserted into an alumina ceramic substrate and cured with epoxy resin. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the copper tube structure of the present invention;

[0018] Appendix Figure 2 This is a schematic diagram of the cross-sectional structure of the copper tube of the present invention;

[0019] Appendix Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0020] Appendix Figure 4 This is a schematic diagram showing the overall structure of the present invention in its disassembled state;

[0021] Appendix Figure 5 This is a schematic diagram of the structure of the present invention after removing the upper mold base and the copper tube;

[0022] Appendix Figure 6 This is a schematic diagram showing the disassembled state of the float core and the mold core of the present invention;

[0023] Appendix Figure 7 This is a schematic diagram of the lower mold base, spring, and equal-height screw structure of the present invention;

[0024] Appendix Figure 8 This is a schematic diagram of the equal-height screw installation method of the present invention. Detailed Implementation

[0025] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0026] This invention provides a copper tube pre-forming mold and a pre-forming method. It is applied to copper tube liquid-cooled heat sinks used in specific electromagnetic radiation environments with alumina ceramic as the substrate.

[0027] Because alumina ceramics possess excellent insulation and radiation resistance, they can be used as a substrate for heat dissipation in electromagnetic environments; however, due to the extreme brittleness of ceramics, it is impossible to press copper tubes into the substrate using interference fitting or even molding them into a D-shape. The technical solution of this invention solves the problem of easily realizing D-shaped copper tubes based on an alumina ceramic substrate. Figure 1 The prefabricated design eliminates the need for crimping copper tubing and shaping. The "D-shape" refers to... Figure 2 As shown, the cross-section of the copper tube is D-shaped.

[0028] This invention comprises a lower mold base 1, a spring 2, a height-equalizing screw 3, a mold core 4, a positioning block 5, a floating core 6, a copper tube 7, and an upper mold base 8. Its principle is that after the mold is closed by a press, the copper tube is molded into a D-shape and can be easily removed.

[0029] To achieve this shaping technology, in this invention, two rows of springs 2 are specifically installed inside the lower mold base 1, and a float core 6 is installed above the springs 2. The float core 6 has a half-D-shaped cavity on the front and a threaded hole on the back. Equal height screws 3 are used to connect the distance between the back of the float core 6 and the springs 2. The equal height screws 3 can make the bottom of the float core 6 and the front of the lower mold base 1 float up and down by a certain distance.

[0030] Install the mold core 4 and positioning block 5 and lock them with screws. The front of the mold core 4 has a semi-D-shaped cavity. At this time, the lower mold structure is assembled. Place the copper tube 7 in the positioning groove (U-shaped groove) of the positioning block 5, close the upper mold base 8, and place it on the hydraulic press work platform. Set a certain pressure to press the copper tube together with the mold to the mold core limit position. Under the action of external force, the copper tube in the stainless steel mold core creeps into the pre-made D-shaped cavity in the mold core 4 and the floating core 6 respectively, so as to obtain the shaped D-shaped copper tube. When the press block is released, the floating core 6 pushes the copper tube 7 out of the mold core 4 under the reaction force of the spring 2, without causing other deformation of the copper tube 7.

[0031] This invention solves the problem of easily achieving D-shaped copper tube assembly on an alumina ceramic substrate without the need for copper tube crimping and shaping. The shaped D-shaped copper tube can be easily installed into the alumina ceramic substrate and cured with epoxy resin.

Claims

1. A copper tube pre-forming mold, the mold being used to shape a copper tube into a D-shaped cross-section, wherein the D-shape is characterized by the upper surface of the copper tube cross-section being a plane and the lower surface being an arc surface, characterized in that... The mold includes: a lower mold base, a mold core, a floating core, and an upper mold base; The mold core is fixed to the lower mold base, and the floating core is disposed within the mold core. The floating core can float up and down within a certain distance relative to the front of the lower mold base. A spring is provided between the floating core and the lower mold base to push the floating core upward a certain distance. A D-shaped cavity is formed together on the mold core and the floating core. The copper tube to be shaped is installed in the D-shaped cavity, and the upper mold base is used to apply force to the copper tube to shape it within the D-shaped cavity. The bottom of the float is connected to an equal-height screw, which slides in conjunction with the lower mold base. A corresponding limiting step is provided between the equal-height screw and the lower mold base to limit the floating distance of the float.

2. The copper tube pre-forming mold according to claim 1, characterized in that, The mold core is provided with a semi-D-shaped cavity, and the float core is provided with a semi-D-shaped cavity. The semi-D-shaped cavities of the mold core and the float core together form a D-shaped cavity for shaping copper tubes.

3. The copper tube pre-forming mold according to claim 1, characterized in that, A positioning block is provided on one side of the mold core. The positioning block is fixed on the lower mold base and has a positioning groove for positioning the copper tube.

4. The copper tube pre-forming mold according to claim 3, characterized in that, Both the mold core and the positioning block are fixed to the lower mold base by screws.

5. A copper tube pre-forming mold according to claim 1, characterized in that, There are multiple springs, arranged in multiple rows side by side.

6. A pre-shaping method using the copper tube pre-shaping mold according to any one of claims 1 to 5, characterized in that, The method includes: assembling the lower mold base, mold core, and floating core to form a lower mold structure; placing the copper tube to be shaped into the positioning groove of the positioning block; Close the upper mold base and place the mold on the hydraulic press working platform; set a certain pressure to press the mold together with the copper tube to the mold core limit position, and the copper tube creeps into the pre-made D-shaped cavity in the mold core and the floating core, thereby obtaining the shaped D-shaped copper tube.

Images