WO2017067317A1

WO2017067317A1 - Process for manufacturing variable cross section metal flow channel water-cooling heat dissipation die-cast cavity

Info

Publication number: WO2017067317A1
Application number: PCT/CN2016/096421
Authority: WO
Inventors: 李先超; 陈小军
Original assignee: 成都泰格微波技术股份有限公司
Priority date: 2015-10-23
Filing date: 2016-08-23
Publication date: 2017-04-27
Also published as: CN106612604B; CN106612604A

Abstract

Provided is a process for manufacturing a variable cross section metal flow channel water-cooling heat dissipation die-cast cavity, comprising the following steps: S1. selecting a metal plate (1), and machining a variable cross section cavity (2) on the metal plate (1); S2. welding a metal cover (3) at the top of the variable cross section cavity (2) to form a closed box flow channel, and at the same time opening a hole and tapping at both the head and tail of the box flow channel; S3. introducing a high-temperature oil into the metal box flow channel; S4. sealing the inlet and outlet with bolts (5), so as to prevent the high-temperature oil from overflowing from the metal flow channel; S5. placing the metal box flow channel into the die-casting mould; S6. closely wrapping the box flow channel with a die-casting aluminium alloy liquid under the action of a pressure injecting force of a die-casting machine, to form a complete product; S7. opening the mould and taking out the cast; and S8. deburring, and opening the bolts at the inlet and outlet of the metal flow channel, followed by blowing a compressed air to blow the high-temperature oil out of the metal flow channel. The manufacture process has a low processing cost, avoids a phenomenon of melting or thermal deformation of the metal flow channel in the die-casting process, and satisfies a heat dissipation effect for electronic components.

Description

Description: A manufacturing process for a water-cooling heat-dissipating cavity of a variable-section metal runner

[0001] The present invention relates to the technical field of manufacturing heat dissipation of electronic components, and more particularly to a manufacturing process of a water-cooling heat-dissipating die-casting cavity of a variable-section metal runner.

Background technique

[0002] Any electronic device has a certain loss during operation, and most of the loss becomes heat. Low-power devices have low losses, no heat sinks, and high-power devices have large losses. If heat dissipation is not taken, the temperature of the device can reach or exceed the allowable junction temperature and the device will be damaged. Therefore, it is necessary to add a heat sink. The most common one is to install the power device on the heat sink, and use the heat sink to dissipate the heat to the surrounding space. If necessary, add a cooling fan to enhance the cooling and cooling at a certain wind speed. Flow cooling water cooling plates are also used on power devices in some large equipment, which have better heat dissipation.

[0003] At present, with the continuous development of electronic technology, the power of equipment is getting larger and larger, and the requirements for heat dissipation are getting higher and higher. The existing heat dissipating cavity is a machine for CNC machining the extruded aluminum alloy sheet into a cavity and a buried metal tube, and applying a thermal conductive glue to the groove and then loading the metal tube. The following defects are encountered in the processing of this process: 1. The extruded aluminum alloy sheet material is processed into the cavity and the groove for installing the metal tube, and the material waste is large; 2. The product processing cycle is long; 3. The product processing cost High; 4, processing the groove on the aluminum alloy sheet, then applying the thermal conductive glue in the groove, installing the metal tube, the process is complicated, and the technical level of the operator is high; 4. There is a gap between the metal tube and the aluminum alloy cavity , non-seamless contact, low heat dissipation efficiency.

technical problem

[0004] The object of the present invention is to overcome the shortcomings of the prior art, and provide a low cost of raw materials, low processing cost, satisfying the heat dissipation effect of electronic components, and avoiding melting or squeezing of the metal flow path during the die-casting process. The manufacturing process of the water-cooling heat-dissipating cavity of the variable-section metal flow channel with the phenomenon of pressure deformation, simple production process and high heat dissipation efficiency.

Problem solution

Technical solution

[0005] The object of the present invention is achieved by the following technical solutions: A variable cross section metal flow channel water-cooling heat-dissipating die-casting cavity The manufacturing process of the body, which includes the following steps:

[0006] Sl, selecting a metal plate, working a variable-section cavity on the metal plate, and processing the heat-dissipating teeth;

[0007] S2, welding a metal cover plate on the top of the variable section cavity to form a closed box flow passage, and simultaneously boring and tapping at the end of the box flow passage;

[0008] S3, after the end of step S2, the high temperature oil is introduced into the flow channel of the box;

[0009] S4, sealing the inlet and the outlet of the flow passage of the casing with screws to prevent high temperature oil from overflowing from the metal flow passage; [0010] S5, placing the flow passage of the casing into the die casting mold, and positioning in the die casting mold The device is positioned; [0011] S6, die-casting, die-casting aluminum alloy liquid tightly wraps the casing flow channel under the action of the die-casting machine to form a complete product;

[0012] S7, die-carrying parts: After the injection is completed and under the action of supercharging, the aluminum alloy and the metal flow channel are tightly integrated into one body, and an aluminum alloy die-casting part is formed between them, when the casting is kept for 10s~15s The mold is taken out of the casting;

[0013] S8, deburring, and hit the screw at the end of the metal flow channel, and then blow compressed air to blow high temperature oil from the metal flow channel;

[0014] S9, using a cleaning agent to remove high temperature oil in the metal flow channel;

[0015] S10, performing partial CNC machining on the surface of the aluminum alloy die-casting part to obtain a finished variable-section metal flow channel water-cooling heat-dissipating die-casting cavity.

[0016] The shape of the metal flow channel is circular, elliptical, square, irregular or variable cross section.

[0017] The metal flow channel may be made of aluminum, steel, copper, iron, or a titanium alloy.

Advantageous effects of the invention

Beneficial effect

[0018] The present invention has the following advantages: (1) The metal flow channel is die-casted into the interior of the aluminum alloy casting by means of a pre-buried metal flow passage, without processing the flow passage after molding, saving raw materials and raw material costs. Low, low processing costs. (2) The heat dissipation cavity is integrated with the metal flow path at one time. This method shortens the product processing cycle, simplifies the manufacturing process, reduces the manufacturing difficulty, and requires less technical level for the operator. (3) The heat dissipation cavity is die-casted from aluminum alloy. The heat of the electronic components is transferred to the die-casting cavity, and then transferred to the metal flow channel by the cavity, and the heat is taken away by the cooling water in the metal flow channel. The metal flow passage is pre-buried and die-cast in the aluminum alloy casting, and is formed once, and the metal flow passage and the aluminum alloy cavity are in seamless contact, and the heat dissipation efficiency is high. (4) In the mold clamping process, the high temperature aluminum alloy solution cannot melt gold It is a flow channel, and the metal flow channel does not undergo thermal deformation, which ensures that the product can be applied to the radar.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of processing a variable section cavity and a heat dissipating tooth on a metal plate;

2 is a structural schematic view of welding a metal cover plate on a variable-section cavity and clogging a screw at a head-to-tail exit of a variable-section cavity; [0020] FIG.

[0021] FIG. 3 is a schematic structural view of a water-cooling heat-dissipating die-casting cavity of a variable-section metal runner;

Figure 4 is a cross-sectional view taken along line A-A of Figure 3;

[0023] In the figure, 1-metal plate, 2-variable section cavity, 3-metal cover, 4-heating tooth, 5-screw, 6-aluminum alloy die casting.

Embodiments of the invention

[0024] The present invention will be further described below with reference to Figs. 1 to 4, and the scope of protection of the present invention is not limited to the following:

[0025] A manufacturing process for a water-cooling heat-dissipating cavity of a variable-section metal runner, comprising the following steps:

[0026] As shown in Figure 1, Sl, select the metal plate 1, on the metal plate 1 to work the variable section cavity 2, and the heat dissipation teeth 4;

[0027] As shown in FIG. 2, S2, the metal cover 3 is welded on the top of the variable-section cavity 2 to form a closed casing flow path.

, the same pupil in the end of the box flow channel and tapping;

[0028] S3, after the end of step S2, the high temperature oil is introduced into the flow channel of the casing;

[0029] S4, plugging the inlet and outlet of the flow channel of the casing with a screw 5 to prevent high temperature oil from overflowing from the metal flow channel; [0030] As shown in FIG. 3, S5, placing the flow path of the casing into the die casting mold And positioning with a positioning device in the die casting mold;

[0031] S6, die-casting, die-casting aluminum alloy liquid tightly wraps the casing flow channel under the action of the die-casting machine to form a complete product, because the high-temperature oil has a high thermal conductivity, when the high-temperature aluminum alloy solution After contact with the metal flow channel, the heat on the aluminum alloy solution is directly absorbed by the high temperature oil, thereby avoiding the aluminum alloy solution melting the metal flow channel. In addition, the hydraulic pressure of the high temperature oil offsets the pressure acting on the metal flow path, and The role of supporting the metal flow channel avoids the deformation of the metal flow channel. [0032] S7, stencil take-up: After the injection is completed and under the action of supercharging, the aluminum alloy and the metal flow channel are tightly integrated into one body, and an aluminum alloy die-casting part 6 is formed between them, when the casting is kept for 10s~15s The casting mold is taken out from the rear die;

[0033] S8, deburring, and hitting the screw 5 at the end of the metal flow channel, and then blowing compressed air to blow the high temperature oil out of the metal flow channel;

[0034] S9, using a cleaning agent to remove high temperature oil in the metal flow channel;

[0035] S10, performing partial CNC machining on the surface of the aluminum alloy die-casting part 6 to obtain a finished variable-section metal flow channel water-cooling calendering die-casting cavity.

[0036] The processed variable-section metal flow channel water-cooling heat-dissipating die-casting cavity is used as follows: The electronic component is mounted on the top surface of the water-cooling heat-dissipating cavity of the variable-section metal runner and above the heat dissipating tooth, The heat generated by the electronic components is transferred to the aluminum alloy die-casting parts, and the aluminum alloy die-casting parts transfer the heat to the heat-dissipating teeth, and the heat of the heat-dissipating teeth 4 is discharged from the metal flow channels by the cooling liquid, which greatly enhances the reinforcement. The heat dissipation effect of the heat dissipation cavity ensures the normal operation of the electronic components.

[0037] After the cavity is added by the CNC machine and the metal tube is embedded in the electronic component, the operating temperature of the electronic component is about 80 ° C, and the water-cooled heat-compression cavity of the variable-section metal flow channel is mounted on the cavity. After the electronic components, the operating temperature of the electronic components is about 50 °C. It can be seen that the heat dissipation effect of the heat dissipation cavity obtained by the process is obviously superior to the conventional use of the CNC machine to add the cavity and then embed the metal. The heat dissipation effect of the tube.

Claims

Claim

[Claim 1] A manufacturing process of a water-cooling heat-dissipating die-casting cavity of a variable-section metal runner, characterized in that it comprises the following steps:

51. Using a metal plate (1), a variable-section cavity (2) is machined on the metal plate (1), and a heat-dissipating tooth (4) is machined;

52. Welding a metal cover plate (3) on the top of the variable-section cavity (2) to form a closed box flow passage, and boring and tapping at the end of the box flow passage;

53. After the step S2 is finished, the high temperature oil is introduced into the flow passage of the box body;

54. Seal the inlet and outlet of the flow path of the box with screws (5) to prevent high temperature oil from overflowing from the metal flow path;

55. The box flow passage is placed in a die-casting mold and positioned by a positioning device in the die-casting mold;

56. Die-casting, die-casting aluminum alloy liquid tightly wraps the flow path of the casing under the pressure of the die-casting machine to form a complete product;

57. Die-carrying parts: After the injection is completed and under the action of supercharging, the aluminum alloy and the metal flow channel are tightly integrated into one body, and aluminum alloy die-casting parts (6) are formed between them, and the castings are kept for 10s~15s. The mold is taken out of the casting;

58. Deburr, and hit the screw (5) at the end of the metal runner, then blow compressed air to blow the high temperature oil out of the metal runner;

59. Cleaning the high temperature oil in the metal flow channel with a cleaning agent;

S10, partial CNC machining is performed on the surface of the aluminum alloy die-casting part (6) to obtain a water-cooling heat-dissipating cavity of the finished variable-section metal runner.

[Claim 2] The manufacturing process of the water-cooling heat-dissipating cavity of the variable-section metal channel according to claim 1, wherein: the shape of the metal channel is circular, elliptical, square, and irregular Or variable cross section.

[Claim 3] The manufacturing process of the water-cooling heat-dissipating cavity of the variable-section metal channel according to claim 1, wherein the metal channel is made of aluminum, steel, copper, iron, or Titanium alloy.