CN110193553B - Punch forming process for copper radiating fins - Google Patents
Punch forming process for copper radiating fins Download PDFInfo
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- CN110193553B CN110193553B CN201910183829.2A CN201910183829A CN110193553B CN 110193553 B CN110193553 B CN 110193553B CN 201910183829 A CN201910183829 A CN 201910183829A CN 110193553 B CN110193553 B CN 110193553B
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- copper
- punching
- radiating fin
- substrate
- copper radiating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Forging (AREA)
Abstract
The invention relates to the field of metal part processing, and discloses a punch forming process of a copper radiating fin, which comprises the following steps: 1, treating a copper substrate; 2, concave-convex stamping forging is carried out on the surface of the copper substrate; punching the extension part of the copper radiating fin on the copper substrate, and punching a straight groove which is vertical to the edge of the extension part of the copper radiating fin; punching and forging the surface of the copper material substrate, punching for three times, and gradually increasing the punching pressure to form a concave-convex structure required by the copper radiating fin on the surface of the copper material substrate, and simultaneously, not punching through the inner hole part of the copper radiating fin, and reserving a material with the thickness of 0.25-0.35 mm; 3, forming the outline of the copper radiating fin; and 4, carrying out inner hole punching of the copper radiating fin. The invention combines the punching and the die cutting, solves the problem of edge collapse or cracking of the copper substrate, and has the advantages of simple steps, high processing efficiency, good processing precision and good use effect.
Description
Technical Field
The invention relates to the field of metal part processing, in particular to a punch forming process of a copper radiating fin.
Background
The radiating fin is a device for radiating heat of electronic elements which are easy to generate heat in electrical appliances, and is made of aluminum alloy, brass or bronze into a plate shape, a sheet shape, a plurality of sheet shapes and the like, for example, a CPU (central processing unit) in a computer needs to use a relatively large radiating fin, and power tubes, row tubes and power amplifier tubes in a power amplifier in a television set need to use the radiating fin. The heat that electronic components sent conducts on the fin, distributes to the surrounding air through the fin again and goes, plays the radiating effect of cooling to electronic components, avoids electronic components to appear overheated burnout.
The radiating fins in the existing high-precision electronic equipment are mostly formed by processing copper sheets for ensuring the heat-conducting property, but the copper materials have high hardness and higher processing difficulty. The existing process for processing the copper sheet has the problems of complicated steps, low processing efficiency and poor processing precision.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a punch forming process for a copper radiating fin, which improves the processing efficiency and the processing precision by combining the punch forging with high impact pressure and the traditional punching, and solves the problems of complicated steps, low processing efficiency and poor processing precision of the existing process for processing the copper sheet.
In order to achieve the purpose, the technical scheme of the invention is as follows: a punch forming process for a copper radiating fin comprises the following steps:
step 1, processing a copper material substrate; punching the copper plate to obtain a copper substrate, wherein the shape of the copper substrate is the same as that of the copper radiating fin, and the size of the copper substrate is 3.5-8mm of the outward extension of the outline of the copper radiating fin; carrying out ultrasonic cleaning on a copper substrate to remove oil stains on the surface; coating lubricating oil on the surface of a copper material substrate;
step 2, carrying out concave-convex impact forging on the surface of the copper substrate; punching the extension part of the outline of the copper radiating fin on the copper material substrate, punching straight grooves which are vertical to the edge of the outline of the copper radiating fin, wherein the straight grooves are arranged at intervals, the distance between each straight groove and the outline of the copper radiating fin is 0.1-0.25mm, and the distance between every two adjacent straight grooves is 1.2-2.0 mm; punching and forging the surface of the copper material substrate, punching for three times, and gradually increasing the punching pressure to form a concave-convex structure required by the copper radiating fin on the surface of the copper material substrate, and simultaneously, not punching through the inner hole part of the copper radiating fin, and reserving a material with the thickness of 0.25-0.35 mm;
step 3, forming the outline of the copper radiating fin; 1. carrying out reverse rough punching on the copper base sheet, wherein the punching size is that the outline of the copper radiating fin is expanded by 0.1-0.2mm on one side, and the punching depth is more than three quarters of the thickness of the copper base sheet; 2. carrying out forward rough punching on the copper substrate, making a zero clearance on a lower die insert block, and punching the copper substrate to enable the size of the copper radiating fin to be 0.1mm of the single-side expansion of the outline of the copper radiating fin; 3. fine punching the copper material substrate, forward punching, ensuring a punching gap of 0.02-0.04mm between an upper die punching head and a lower die insert, and punching and forming;
and 4, punching an inner hole of the copper radiating fin, and punching and forming the inner hole part of the copper radiating fin.
As a preferable scheme of the invention, in the step 2, when the punching forging operation is carried out, the punching forging die reserves 0.010-0.015mm of punching forging resilience.
In a preferred embodiment of the present invention, in step 2, the press pressures of 80T, 130T and 150T are 3 times of the press forging operation.
As a preferred scheme of the invention, the scheme also comprises a step 5 of performing discharge finishing on the side wall of the inner hole of the copper radiating fin; and the side wall of the inner hole of the copper radiating fin is subjected to discharge machining, so that the precision and the flatness of the side wall of the inner hole of the copper radiating fin are improved.
As a preferable scheme of the invention, the scheme further comprises a step 6 of cleaning; and cleaning the copper radiating fins to remove surface lubricating oil.
Through the technical scheme, the technical scheme of the invention has the beneficial effects that: the invention processes and shapes the copper radiating fin, because the copper radiating fin is thicker, and the copper material is harder, adopt the traditional method, can't be very good to stretch, the machining precision is bad, the edge is apt to appear the burr, and the invention combines the stamp forging with die cutting, the step is simple, the machining efficiency is high, the machining precision is good, the result of use is good, the edge of the copper radiating fin processed is burr-free, the intensity is high, the precision is good, the radiating effect is good.
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 drawings without creative efforts.
Fig. 1 is a schematic structural view of a copper heat sink sheet processed according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With reference to fig. 1, the invention processes the copper heat sink with similar structure, the surface of the copper heat sink has concave and convex stripes, which can improve the surface area of the copper heat sink and the heat dissipation efficiency, and the copper heat sink has an inner hole for installation and positioning.
The invention specifically adopts the following technical method to process the copper radiating fin:
step 1, processing a copper material substrate. And punching the copper plate to obtain a copper substrate, wherein the shape of the copper substrate is the same as that of the copper radiating fin, and the size of the copper substrate is 3.5-8mm of the outward extension of the outline of the copper radiating fin. (reserve the profile extension on the copper product substrate and can effectively avoid the forging pressure too big, lead to the edge of copper product substrate to sink or the fracture, guarantee the quality of copper product substrate.) carries out ultrasonic cleaning to the copper product substrate, gets rid of the surface greasy dirt. In order to improve the surface quality of the copper material substrate in the subsequent stamping and forging and play a role in heat dissipation in the whole processing process, lubricating oil is coated on the surface of the copper material substrate.
And 2, carrying out concave-convex impact forging on the surface of the copper material substrate. In order to avoid cracking at the forge edge, reduce the internal stress action and improve the precision, the extension part of the outline of the copper radiating fin on the copper material substrate is punched, straight grooves which are vertical to the edge of the outline of the copper radiating fin are punched, the straight grooves are arranged at intervals, the distance between each straight groove and the outline of the copper radiating fin is 0.1-0.25mm, and the distance between adjacent straight grooves is 1.2-2.0 mm. Punching and forging the surface of the copper material substrate, wherein in order to improve the punching and forging precision, punching is carried out for three times, the punching pressure is gradually increased, so that a concave-convex structure required by the copper radiating fin is formed on the surface of the copper material substrate, and in order to avoid the deformation of the copper material substrate, the inner hole part of the copper radiating fin is not punched through, and a material with the thickness of 0.25-0.35mm is reserved. In this step, preferably, the punch forging die is reserved with 0.010-0.015mm of punch forging resilience when performing the punch forging operation.
And step 3, forming the outline of the copper radiating fin. Because the thickness of copper product substrate is thick relatively, can not appear burr and edge collapse phenomenon in order to avoid the edge, adopt three step blanking shaping in this step: 1. carrying out reverse rough punching on the copper base sheet, wherein the punching size is that the outline of the copper radiating fin is expanded by 0.1-0.2mm on one side, and the punching depth is more than three quarters of the thickness of the copper base sheet; 2. carrying out forward rough punching on the copper substrate, making a zero clearance on a lower die insert block, and punching the copper substrate to enable the size of the copper radiating fin to be 0.1mm of the single-side expansion of the outline of the copper radiating fin; 3. and (3) carrying out fine blanking on the copper material substrate, carrying out forward blanking, ensuring a blanking clearance of 0.02-0.04mm by an upper die punch and a lower die insert, and carrying out die-cutting forming. After the step of processing, the edge of the outline of the copper radiating fin is good in quality and high in precision, outline finishing is not needed, and the processing step is simplified.
And 4, punching an inner hole of the copper radiating fin, and punching and forming the inner hole part of the copper radiating fin.
In order to have good surface effect after stamping, in step 2, the stamping operation is performed for 3 times under 80T pressure, 130T pressure and 150T pressure.
In order to improve the inner hole precision of the copper radiating fin, the side wall of the inner hole of the copper radiating fin is subjected to discharge finishing; and the side wall of the inner hole of the copper radiating fin is subjected to discharge machining, so that the precision and the flatness of the side wall of the inner hole of the copper radiating fin are improved.
The dimensional tolerance of the processed copper radiating fin is +/-0.01 m, the surface roughness reaches Ry0.2-0.4 mu m, the flatness reaches 0.01mm, the phenomena of edge burrs and edge collapse are not found in the copper radiating fin, and the processing precision is good.
Through the specific embodiment, the beneficial effects of the invention are as follows: the invention processes and shapes the copper radiating fin, because the copper radiating fin is thicker, and the copper material is harder, adopt the traditional method, can't be very good to stretch, the machining precision is bad, the edge is apt to appear the burr, and the invention combines the stamp forging with die cutting, the step is simple, the machining efficiency is high, the machining precision is good, the result of use is good, the edge of the copper radiating fin processed is burr-free, the intensity is high, the precision is good, the radiating effect is good.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A punch forming process for a copper radiating fin is characterized by comprising the following steps:
step 1, processing a copper material substrate; punching the copper plate to obtain a copper substrate, wherein the shape of the copper substrate is the same as that of the copper radiating fin, and the size of the copper substrate is 3.5-8mm of the outward extension of the outline of the copper radiating fin; carrying out ultrasonic cleaning on a copper substrate to remove oil stains on the surface; coating lubricating oil on the surface of a copper material substrate;
step 2, carrying out concave-convex impact forging on the surface of the copper substrate; punching the extension part of the outline of the copper radiating fin on the copper material substrate, punching straight grooves which are vertical to the edge of the outline of the copper radiating fin, wherein the straight grooves are arranged at intervals, the distance between each straight groove and the outline of the copper radiating fin is 0.1-0.25mm, and the distance between every two adjacent straight grooves is 1.2-2.0 mm; punching and forging the surface of the copper material substrate, punching for three times, and gradually increasing the punching pressure to form a concave-convex structure required by the copper radiating fin on the surface of the copper material substrate, and simultaneously, not punching through the inner hole part of the copper radiating fin, and reserving a material with the thickness of 0.25-0.35 mm;
step 3, forming the outline of the copper radiating fin; 1. carrying out reverse rough punching on the copper base sheet, wherein the punching size is that the outline of the copper radiating fin is expanded by 0.1-0.2mm on one side, and the punching depth is more than three quarters of the thickness of the copper base sheet; 2. carrying out forward rough punching on the copper substrate, making a zero clearance on a lower die insert block, and punching the copper substrate to enable the size of the copper radiating fin to be 0.1mm of the single-side expansion of the outline of the copper radiating fin; 3. fine punching the copper material substrate, forward punching, ensuring a punching gap of 0.02-0.04mm between an upper die punching head and a lower die insert, and punching and forming;
and 4, punching an inner hole of the copper radiating fin, and punching and forming the inner hole part of the copper radiating fin.
2. The copper heat sink stamping forming process according to claim 1, wherein in step 2, the stamping die reserves 0.010-0.015mm of stamping resilience during the stamping operation.
3. The copper heat sink stamping forming process according to claim 1, wherein in step 2, the 3 stamping pressures of the stamping operation are 80t pressure, 130t pressure and 150t pressure respectively.
4. The stamping forming process of the copper heat sink sheet according to claim 1, further comprising step 5 of performing discharge finishing on the side wall of the inner hole of the copper heat sink sheet; and the side wall of the inner hole of the copper radiating fin is subjected to discharge machining, so that the precision and the flatness of the side wall of the inner hole of the copper radiating fin are improved.
5. The copper heat sink stamping forming process according to claim 4, further comprising step 6, cleaning; and cleaning the copper radiating fins to remove surface lubricating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910183829.2A CN110193553B (en) | 2019-03-12 | 2019-03-12 | Punch forming process for copper radiating fins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910183829.2A CN110193553B (en) | 2019-03-12 | 2019-03-12 | Punch forming process for copper radiating fins |
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| Publication Number | Publication Date |
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| CN110193553A CN110193553A (en) | 2019-09-03 |
| CN110193553B true CN110193553B (en) | 2020-12-15 |
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| CN201910183829.2A Active CN110193553B (en) | 2019-03-12 | 2019-03-12 | Punch forming process for copper radiating fins |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7562444B2 (en) * | 2005-09-08 | 2009-07-21 | Delphi Technologies, Inc. | Method for manufacturing a CPU cooling assembly |
| US20120240401A1 (en) * | 2007-05-28 | 2012-09-27 | Delta Electronics, Inc. | Manufacturing method of a heat sink |
| CN101480686B (en) * | 2008-01-08 | 2014-07-30 | 奇鋐科技股份有限公司 | Method for producing radiating rib |
| CN103230974B (en) * | 2013-05-09 | 2016-08-03 | 惠州智科实业有限公司 | A kind of low cost high productivity panel leaf-teeth extruding type radiating fin processing process |
| CN103354678B (en) * | 2013-07-02 | 2015-04-29 | 吴会霞 | Electromagnetic heating device and electromagnetic heat-supplying device |
| CN108811196B (en) * | 2018-07-09 | 2024-06-04 | 江苏众众电热科技有限公司 | New energy automobile PTC heater multi-core shared radiating fin and manufacturing method thereof |
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