CN115431011A - Method for processing high-density radiating teeth - Google Patents
Method for processing high-density radiating teeth Download PDFInfo
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- CN115431011A CN115431011A CN202210973476.8A CN202210973476A CN115431011A CN 115431011 A CN115431011 A CN 115431011A CN 202210973476 A CN202210973476 A CN 202210973476A CN 115431011 A CN115431011 A CN 115431011A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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Abstract
The invention relates to the technical field of radiator processing technology, in particular to a processing method of high-density radiating teeth for electronic equipment. The method specifically comprises the following steps: forming the radiating teeth in a die-casting forming mode; and machining the die-cast heat dissipation teeth to obtain the heat dissipation teeth meeting the heat dissipation conditions of the electronic equipment. Compared with a pure machining mode, the manufacturing efficiency of the high-density radiating tooth is improved by more than 70% by a mode of combining die casting and machining, and compared with a pure die casting process, the weight of the radiating tooth is reduced, and the radiating efficiency is also improved. Because of high-speed mold filling, the mold filling time is short, the metal liquid is quickly solidified, and the cycle speed of the die casting operation is high; in a common manufacturing process, the die casting process has the highest production efficiency and is suitable for mass production of high-density radiating teeth.
Description
Technical Field
The invention belongs to the technical field of radiator processing technology, and particularly relates to a processing method of a high-density radiating tooth for electronic equipment.
Background
When designing the electronic equipment that the individual soldier was born, for the purpose that the soldier was on foot after bearing, restricted the equipment gross weight. The electronic equipment has larger heat productivity, so the mode of manufacturing the heat dissipation teeth by adopting a machining process is adopted while the total quantity of the heat dissipation teeth of the electronic equipment radiator is ensured, the thickness of a single tooth sheet is reduced to lighten the weight of the radiator, and further the total weight of the whole electronic equipment is lightened.
When the heat dissipation teeth are manufactured in small batch production, the machining process can barely meet the requirements of production efficiency and cost. However, when the heat dissipation teeth are manufactured in a large scale, the production requirements cannot be met. For example, in the prior art, the original processing technology of the flat plate blade tooth extrusion type radiating fin is simplified from cutting-woodworking-alkaline washing-stamping into cutting-alkaline washing-continuous die stamping, so that the processing technology is simplified, the stability in the processing process is improved, the labor cost is reduced, and meanwhile, the processing technology still cannot adapt to mass production and manufacturing, and the problem of low efficiency still exists; in the disclosed preparation method of the semi-solid state die-casting formed radiator, the base plate and the cylinder body part are separately formed by semi-solid state die-casting, and then the cylinder body part is combined with the upper surface of the base plate in a hot-pressing fusion mode, so that the traditional die-casting integrated forming mode is replaced, the forming process is effectively simplified, the cost is reduced, but the thickness of a single heat dissipation column (tooth sheet) is still thicker, and the total weight of the radiator is increased.
Based on the above analysis, there is a need to improve the current method for machining high-density heat dissipation teeth, and a method for machining high-density heat dissipation teeth suitable for electronic devices is proposed.
Disclosure of Invention
The invention provides a method for processing a high-density radiating tooth for electronic equipment, which can at least solve part of problems in the prior art.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
a processing method of a high-density heat dissipation tooth comprises the following steps:
s1: forming the radiating teeth in a die-casting forming mode;
s2: and machining the die-cast heat dissipation teeth to obtain the heat dissipation teeth meeting the heat dissipation conditions of the electronic equipment.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the method comprises the following steps: in the step S1, the method specifically includes the following steps:
s1.1, a pre-pouring stage: liquid metal used for manufacturing heat dissipation teeth in a pressure chamber of a die casting machine is led to a pouring gate without eddy current, and an injection piston moves at a constant speed or acceleration;
s1.2, a mold filling process: after a short acceleration, rapidly performing at a stable speed so as to enable the liquid metal in the pouring gate to reach a stable flowing speed;
s1.3, pressurizing and solidifying: the die casting in the die cavity is densified by quickly pressing the liquid metal in the accommodating chamber, the pressurization in the die cavity is kept until the casting is solidified, and the radiating teeth are formed.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the method comprises the following steps: in step S1.3, the fast voltage build-up is performed by a supercharger or by direct control of injection.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the method comprises the following steps: in the step S1.3, the pressurization range is 90-100 Mpa.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the method comprises the following steps: and in the step S1.3, after the casting is solidified, demolding and taking out the casting from the mold cavity through the cooperation of the ejector rod and the manipulator.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the method comprises the following steps: in the step S2, a cleaning and drying step is performed after machining.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the processing method comprises the following steps: in the step S2, the die-cast blank is machined by using a milling machine or CNC equipment, and the unformed tooth piece is machined to obtain the heat dissipation tooth with the required technological parameters and precision, so as to complete the machining of the high-density heat dissipation tooth.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the processing method comprises the following steps: the method further comprises step S3: and carrying out secondary machining on the machined heat dissipation teeth.
As a preferable scheme of the processing method of the high-density heat dissipation tooth, the method comprises the following steps: and in the step S3, performing quality inspection and packaging after secondary machining.
Advantageous effects
Compared with the prior art, the invention has obvious advantages and beneficial effects, and specifically, the technical scheme includes that:
(1) The mode of combining die casting and machining after die casting is carried out firstly, so that the manufacturing efficiency of the high-density radiating tooth is improved by more than 70% compared with the pure machining mode, the weight of the radiating tooth is reduced compared with the pure die casting process, and the radiating efficiency is also improved.
(2) Die casting technology in this application, the size precision of die casting is higher, only needs can assemble the use through a small amount of machining, and some die castings can the direct assembly use. The material utilization rate is about 60-80%, and the blank utilization rate is as high as 90%. Because of high-speed mold filling, the mold filling time is short, the metal liquid is quickly solidified, and the cycle speed of the die-casting operation is high. In a common manufacturing process, the die-casting process has the highest production efficiency and is suitable for mass production of high-density radiating teeth.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for manufacturing a high-density heat sink tooth according to the present application;
FIG. 2 is a schematic view illustrating a die-casting method for manufacturing a high-density heat dissipation tooth according to the present application;
fig. 3 is a schematic plan view illustrating a die-casting molding method for manufacturing a high-density heat dissipation tooth according to the present application;
FIG. 4 is a schematic view of a machining process of a high-density heat dissipation tooth according to the present application;
FIG. 5 is a first embodiment of a method for manufacturing a high-density heat sink tooth according to the present application;
fig. 6 is a second implementation schematic diagram of a processing method of a high-density heat dissipation tooth according to the present application.
The reference numbers illustrate:
s1-die casting forming and S2-machining process
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Example 1
The embodiment 1 of the invention discloses a method for processing a high-density radiating tooth, which comprises the following steps of:
s1: forming the radiating teeth in a die-casting forming mode;
die casting is generally divided into three stages: in a first pouring stage or pre-pouring stage, liquid metal in a pressure chamber is led to a pouring gate as free of eddy current as possible, and a injection piston moves slowly at a constant speed or acceleration; the second casting phase, which is the actual filling process, proceeds very quickly at a steady speed after a short acceleration. So as to lead the liquid metal in the pouring gate to reach stable flow speed; in the third pouring stage (pressurization), the die casting in the die cavity is densified by quickly building pressure on the liquid metal in the accommodating chamber, the building of the pressure is completed by a booster or directly controlling injection, and the pressurization in the die cavity is kept until the casting is solidified.
It should be noted that the whole die casting system (pressure chamber, gating system, cavity, etc.) is communicated with the atmosphere, the molten metal is filled at high pressure and high speed, if the ordered and stable flowing state can not be realized, the molten metal can generate vortex, the molten metal can roll in the gas coil, the casting can be scrapped due to casting defects such as air holes and bubbles generated on the casting, and therefore, the liquid metal is ensured to be led to the pouring gate without vortex.
According to various factors such as the complexity of a die, the wall thickness of a product and the like, and also in combination with comprehensive consideration of specific pressure, temperature and speed, all die-casting parameters are determined through die testing (a simple grinding tool is usually used once, and a complex grinding tool is used for 2-3 times), and the parameters are recorded as the basis of subsequent production. Generally, when the specific pressure of the die is higher, low temperature and high pressure are adopted to ensure the fluidity of the metal liquid, and when the specific pressure is lower, the temperature is increased to reduce the viscosity of the metal to ensure the fluidity.
The die-casting process determines the quality of the heat-dissipating teeth, necessary to ensure a non-turbulent movement of the liquid metal in the chamber during the first casting phase; in the second pouring stage, the die stamping time is shortened by increasing the speed of the pouring piston so as to reduce the defects of casting inside and outside pouring, and the wall thickness requirement of the casting is met.
The containing chamber is a place for storing liquid metal in the die-casting chamber, even if the density of a die-casting piece is increased, the phenomenon that bubbles or a cavity is not completely filled is prevented, the defects are usually avoided by using high pressure and pressure maintaining, the pressure maintaining time is determined by testing the die according to various factors such as the complexity of the die, and the recorded parameters are used as the production basis in the future.
In addition, the transition time from the second pouring stage to the third pouring stage is minimized when the casting is densified until the pouring piston stops moving. The injection mechanism is not limited in the present application, and those skilled in the art can understand that various injection mechanisms that can be implemented can be applied to the die casting process. The casting process and the die stamping process should be optimized as much as possible with the aim of reducing porosity, burrs and other die casting defects in the die casting process. The die-casting precision of the radiating teeth is guaranteed in the process, the radiator with excellent performance is manufactured, and the performance of the product is improved.
S2: machining the die-cast heat dissipation teeth;
and machining the die-cast blank by using equipment such as a milling machine or a CNC (computer numerical control) machine, machining an unformed tooth sheet to obtain the heat dissipation tooth with required technological parameters and precision, and finishing the machining of the high-density heat dissipation tooth.
After the machining, the heat dissipation teeth can be cleaned and dried, and can be directly put in storage for later use if the quality inspection requirement is met; if the precision does not meet the assembly requirement, secondary machining is carried out on the machined heat dissipation gear as appropriate, and the steps of quality inspection, packaging and warehousing are repeatedly carried out after the secondary machining.
Certainly, also can be according to the machining precision requirement, select the clamping anchor clamps that can accomplish heat dissipation tooth machine and add the requirement, the clamping anchor clamps use a plurality of faces of processing product on a station as the preference, reduce the clamping number of times, when improving production efficiency, reduce the cost of processing production.
Example 2
Embodiment 2 of the present invention discloses a method for processing a high-density heat dissipation tooth, as shown in fig. 2 to 6:
fig. 2 shows a blank after die-casting, and a final product obtained by processing the unformed part of the heat dissipation teeth is shown in fig. 4. In the plan view shown in fig. 3, compared with the method for manufacturing the tooth sheet with the same thickness as the machining process, the margin of the pure machining process required by the die-cast heat dissipation tooth blank is much less, the machining time of the die-cast tooth sheet is obviously reduced, the single-piece time is reduced, the machining of batch products is accumulated, the production efficiency is obviously improved, and the manufacturing cost is reduced.
In fig. 5-6, schematic views of the machining of heat dissipating teeth of different tooth thicknesses and tooth spacings are given:
in fig. 5: tooth thickness 1.4, tooth spacing 3
The heat dissipation teeth are manufactured by a die casting process. The limit of the compression casting process is that the single-chip tooth thickness of the heat dissipation tooth is generally 1.2-1.5mm, and the tooth space is generally 2.5-3mm, so that the compression casting process can effectively reduce the manufacturing cost and improve the production efficiency under the condition of mass production.
In fig. 6: tooth thickness 0.84, tooth spacing 2
Under the conditions of large heat productivity of equipment and limited total mass of the equipment, the tooth thickness (which can be less than 1 mm) of the single-chip heat dissipation tooth is reduced by a machining method, and the mass of the equipment can be effectively reduced under the condition of ensuring the heat dissipation capacity of the equipment.
In order to reduce the manufacturing cost and improve the production efficiency, and simultaneously break through the limit of a die-casting process and manufacture thinner tooth sheets, a machining process of a heat-dissipation tooth with interval type thickness is designed, after the die-casting manufacturing is finished, a product is machined for the second time, and the tooth sheets with the same machining thickness can be manufactured. Compared with a pure machining process, the production efficiency is obviously improved.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (9)
1. A processing method of high-density radiating teeth is provided, the high-density radiating teeth are used for radiating heat of electronic equipment carried by a single soldier, and the processing method is characterized in that: the processing method comprises the following steps:
s1: forming the radiating teeth in a die-casting forming mode;
s2: and machining the die-cast heat dissipation teeth to obtain the heat dissipation teeth meeting the heat dissipation conditions of the electronic equipment.
2. The method for manufacturing a high-density heat dissipating tooth according to claim 1, wherein: the step S1 includes the steps of:
s1.1, a pre-pouring stage: liquid metal used for manufacturing heat dissipation teeth in a pressure chamber of a die casting machine is led to a pouring gate without eddy current, and an injection piston moves at a constant speed or acceleration;
s1.2, filling a mold: after a short acceleration, rapidly performing at a stable speed so as to enable the liquid metal in the pouring gate to reach a stable flowing speed;
s1.3, pressurizing and solidifying: the die casting in the die cavity is densified by quickly pressing liquid metal in the accommodating chamber, the pressurization in the die cavity is kept until the casting is solidified, and the radiating teeth are formed.
3. The method for manufacturing a high-density heat dissipating tooth according to claim 2, wherein: in step S1.3, the fast voltage build-up is performed by a supercharger or by direct control of injection.
4. The method for manufacturing a high-density heat dissipating tooth according to claim 2, wherein: in the step S1.3, the pressurization range is 90-100 Mpa.
5. The method for manufacturing a high-density heat dissipating tooth according to claim 2, wherein: and in the step S1.3, after the casting is solidified, demolding and taking out the casting from the mold cavity through the cooperation of the ejector rod and the manipulator.
6. The method for manufacturing a high-density heat dissipating tooth according to claim 1, wherein: in the step S2, a cleaning and drying step is performed after machining.
7. The method for manufacturing a high-density heat dissipating tooth according to claim 1, wherein: in the step S2, the die-cast blank is machined by CNC equipment, and the unformed tooth piece is machined to obtain the heat dissipation tooth with the required technological parameters and precision.
8. The method for processing a high-density heat-dissipating tooth according to any one of claims 1 to 7, wherein: the method further comprises step S3: and carrying out secondary machining on the machined heat dissipation teeth.
9. The method for manufacturing a high-density heat dissipating tooth according to claim 8, wherein: and in the step S3, performing quality inspection and packaging after secondary machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210973476.8A CN115431011A (en) | 2022-08-15 | 2022-08-15 | Method for processing high-density radiating teeth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210973476.8A CN115431011A (en) | 2022-08-15 | 2022-08-15 | Method for processing high-density radiating teeth |
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| CN115431011A true CN115431011A (en) | 2022-12-06 |
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| CN202210973476.8A Pending CN115431011A (en) | 2022-08-15 | 2022-08-15 | Method for processing high-density radiating teeth |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274361A (en) * | 2008-05-08 | 2008-10-01 | 南昌航空大学 | Low speed vacuum squeeze casting technology |
| JP2010201497A (en) * | 2009-03-06 | 2010-09-16 | Nissan Motor Co Ltd | Heat sink for strong electric car parts, heat sink unit using the same, and method for producing heat sink for strong electric car parts |
| CN204396834U (en) * | 2014-12-30 | 2015-06-17 | 苏州市永创金属科技有限公司 | A kind of compression mod for the manufacture of aluminium section bar embedded filters |
| CN204621048U (en) * | 2015-02-10 | 2015-09-09 | 深圳市立德宝电器有限公司 | The die cast structure of blade extrusion section bar |
| CN112427617A (en) * | 2020-11-23 | 2021-03-02 | 厦门格耐尔科技有限公司 | Pressure casting method for multi-section uniform acceleration injection of liquid metal |
| CN216463145U (en) * | 2021-11-16 | 2022-05-10 | 菲斯达精密工业部件（苏州）有限公司 | Filter cavity heat dissipation tooth milling fixture |
| CN216977299U (en) * | 2021-11-05 | 2022-07-15 | 北京热刺激光技术有限责任公司 | Radiator and air-cooled laser |
-
2022
- 2022-08-15 CN CN202210973476.8A patent/CN115431011A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274361A (en) * | 2008-05-08 | 2008-10-01 | 南昌航空大学 | Low speed vacuum squeeze casting technology |
| JP2010201497A (en) * | 2009-03-06 | 2010-09-16 | Nissan Motor Co Ltd | Heat sink for strong electric car parts, heat sink unit using the same, and method for producing heat sink for strong electric car parts |
| CN204396834U (en) * | 2014-12-30 | 2015-06-17 | 苏州市永创金属科技有限公司 | A kind of compression mod for the manufacture of aluminium section bar embedded filters |
| CN204621048U (en) * | 2015-02-10 | 2015-09-09 | 深圳市立德宝电器有限公司 | The die cast structure of blade extrusion section bar |
| CN112427617A (en) * | 2020-11-23 | 2021-03-02 | 厦门格耐尔科技有限公司 | Pressure casting method for multi-section uniform acceleration injection of liquid metal |
| CN216977299U (en) * | 2021-11-05 | 2022-07-15 | 北京热刺激光技术有限责任公司 | Radiator and air-cooled laser |
| CN216463145U (en) * | 2021-11-16 | 2022-05-10 | 菲斯达精密工业部件（苏州）有限公司 | Filter cavity heat dissipation tooth milling fixture |
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