CN111940527A - Extrusion die for forming substrate of insert radiator - Google Patents
Extrusion die for forming substrate of insert radiator Download PDFInfo
- Publication number
- CN111940527A CN111940527A CN202010735370.5A CN202010735370A CN111940527A CN 111940527 A CN111940527 A CN 111940527A CN 202010735370 A CN202010735370 A CN 202010735370A CN 111940527 A CN111940527 A CN 111940527A
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- die
- cavity
- working cavity
- die face
- working
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- 238000001125 extrusion Methods 0.000 title claims abstract description 28
- 239000000758 substrate Substances 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 6
- 238000010892 electric spark Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 230000002776 aggregation Effects 0.000 abstract description 4
- 238000004220 aggregation Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/06—Making sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses an extrusion die for forming an insert radiator substrate, which comprises a die face part, a working cavity and a die face cavity, wherein the working cavity and the die face cavity are formed in the die face part and are communicated; the cross section shape of the working cavity is consistent with that of the substrate of the inserted sheet radiator, the cross section of the inlet of the working cavity is the same as that of the substrate of the inserted sheet radiator, and the cross section area of the working cavity is continuously increased along the material feeding direction. According to the invention, the original working zone is changed into the integral working cavity structure by adding a primary idle cutter hierarchical structure, so that the integral working cavity structure can be integrally formed by adopting wire cutting, and the idle cutter position is prevented from being machined in an electric spark process, thereby reducing the risk of local microcracks generated by electric discharge machining, increasing the rigidity of the working zone part of the die, and prolonging the service life. Because no empty knife step groove exists, the risks of hand feeling aluminum extrusion lines and large-size particle aggregation generated in the extrusion process are reduced, and the surface quality of the radiator is improved.
Description
Technical Field
The invention relates to the technical field of mold design, in particular to an extrusion mold for forming a substrate of an insert radiator.
Background
In order to improve the heat dissipation performance of the electrical elements/equipment, the heat dissipation structure of the electrical elements/equipment mostly adopts a high-density gear insert type aluminum alloy structure. As shown in figure 1, an inserted sheet radiator base plate 4 of an aluminum profile which is directly contacted with a heating element needs to adopt a zigzag sawtooth structure, and then radiating fins with the thickness of about 1mm are used in an inserting and combining way. For the guarantee to insert and join in marriage the effect, the sawtooth structure groove depth on inserted sheet radiator base plate 4 is mostly less than 5mm, and the groove width is mostly less than 2 millimeters.
The tab radiator substrate 4 is typically extruded from an aluminum ingot in an extrusion die. The conventional structure of the working cavity of the die face portion 1 adopts a hierarchical design scheme (a typical working tape and blank cutter structure), an inner cavity profile corresponding to the size of the working tape is generally machined by a wire cutting method, and then a blank cutter structure at the rear part of the working tape is machined by electric discharge of an electric spark device, as shown in fig. 2, so as to form the working cavity in the form of a step groove (i.e., a working tape cavity 10+ a blank cutter cavity 20). To reduce the loss of rigidity, the step height D of a typical primary blank structure is only 0.3mm, as shown in fig. 3. The structure increases the processing difficulty of the die working belt, the precision is difficult to accurately control, and the strength of the die working belt is reduced. Meanwhile, the empty knife is easy to generate the aggregation of aluminum particles (pickup), so that obvious aluminum extrusion lines or particles are generated, and the failure risk of the electrical equipment in the use process is increased.
The Chinese patent CN201820115934.3 discloses an oblique hollow cutter cavity die, the wall surface of the hollow cutter cavity is an oblique surface, and the oblique surface can remove the stacking force generated by friction, thereby avoiding die blocking. However, the working cavity of the device is still the traditional working band blank adding knife cavity structure, and the problems still exist when the device is used for forming the substrate of the insert radiator.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the extrusion die for forming the insert sheet radiator substrate, which has long service life, is easy to form and can improve the surface quality of a formed part.
In order to solve the technical problems, the invention adopts the following technical scheme:
an extrusion die for forming an insert radiator substrate comprises a die face part, and a working cavity and a die face cavity which are formed in the die face part, wherein the working cavity is positioned at the feeding end of the die face part, the die face cavity is positioned at the discharging end of the die face part, and the working cavity is communicated with the die face cavity; the cross section shape of working chamber is unanimous with the cross section shape of inserted sheet radiator base plate, the cross section of working chamber entrance is the same with the cross section size of inserted sheet radiator base plate, the cross sectional area of working chamber increases along material direction of feed in succession.
The invention changes the original working area of the die surface of the insert radiator substrate forming die added with a primary blank cutter hierarchical structure into a working cavity integral structure, thereby being integrally formed by adopting linear cutting. The original mould processing procedure is optimized, the empty cutter position can be prevented from being processed by the electric spark procedure, so that the risk of generating local microcracks due to electric discharge processing is reduced, the rigidity of the working part of the mould is increased, and the service life is prolonged. Because no empty knife step groove exists, the risks of hand feeling aluminum extrusion lines and large-size particle aggregation generated in the extrusion process are reduced, and the surface quality of the radiator is improved.
As a further improvement of the above technical solution:
the wall surface of the working cavity and the material feeding direction form an included angle of 1-2 degrees.
Practice shows that the inclination angle of the wall surface of the working cavity has obvious influence on the forming quality of the substrate of the insert radiator.
When the angle is too small, the friction surface between the aluminum alloy and the inner wall of the working cavity of the die is enlarged, and the friction force is increased, 1) the fluidity of the aluminum alloy is influenced, local high temperature is caused, crystal grains grow up, and the texture structure of the aluminum alloy is influenced; 2) will seriously influence ejection of compact size, both sides metal flow resistance grow the range far beyond the resistance of middle part increase, lead to both sides metal extrusion speed to slow down, the working chamber metal filling speed is not enough to the thick both ends thin phenomenon in middle appears.
The contact surface of the aluminum alloy and the inner wall of the working cavity is too small due to too large angle, the stress concentration of the tip of the die occurs, 1) the supporting force is not enough, and the forming part of the die is easy to generate local abrasion and even brittle fracture; 2) resulting in local deformations that produce dimensional variations out of tolerance.
The length of the working cavity along the material extending direction is 20-25mm, and excessively long length can cause excessive contact friction between the aluminum alloy and the working cavity to generate deformation, so that the die is easily scrapped.
The front end of the die face portion along the material feeding direction is connected with a flow guide portion, the rear end of the die face portion along the material feeding direction is connected with a die pad portion, a flow guide cavity is formed in the flow guide portion, a die pad cavity is formed in the die pad portion, and the flow guide cavity, the working cavity, the die face cavity and the die pad cavity are communicated in sequence.
The die surface die cavity comprises a primary die surface die cavity communicated with the working cavity and a secondary die surface die cavity communicated with the die cushion cavity.
The flow guide part and the die surface part and the die cushion part are connected through pin bolts in a locking mode.
Compared with the prior art, the invention has the advantages that:
1. the invention changes the original working area of the die surface of the insert radiator substrate forming die added with a primary blank cutter hierarchical structure into a working cavity integral structure, thereby being integrally formed by adopting linear cutting. The original mould processing procedure is optimized, the empty cutter position can be prevented from being processed by the electric spark procedure, so that the risk of generating local microcracks due to electric discharge processing is reduced, the rigidity of the working part of the mould is increased, and the service life is prolonged. Because no empty knife step groove exists, the risks of hand feeling aluminum extrusion lines and large-size particle aggregation generated in the extrusion process are reduced, and the surface quality of the radiator is improved.
2. The invention ensures the molding quality of the radiator by optimizing the structure of the working cavity.
Drawings
FIG. 1 is a schematic view of a substrate of an insert heat sink.
Fig. 2 is a partial structural view of a die face working cavity in the prior art.
Fig. 3 is a partial cross-sectional structural schematic view at a die face working cavity of the prior art.
Fig. 4 is a schematic side view of an extrusion mold for forming a substrate of an insert sheet heat sink according to an embodiment of the invention.
Fig. 5 is a schematic cross-sectional structural view of an extrusion die for forming a substrate of an insert sheet heat sink according to an embodiment of the present invention.
FIG. 6 is a schematic view of a partial structure of a die face working cavity according to an embodiment of the present invention.
Fig. 7 is an enlarged view of a portion a in fig. 5.
Illustration of the drawings: 1. molding a face part; 11. a working chamber; 12. a die face cavity; 121. a primary die face cavity; 122. a secondary die surface cavity; 2. a flow guide part; 21. a flow guide cavity; 3. a die pad portion; 31. a die cushion cavity.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
Example (b):
as shown in fig. 4-7, the extrusion die for forming the substrate of the insert sheet heat sink in the present embodiment includes a flow guiding portion 2, a die face portion 1 and a die cushion portion 3, which are sequentially connected by a pin bolt lock.
A diversion cavity 21 is formed in the diversion part 2, a working cavity 11 and a die surface cavity 12 are formed in the die surface part 1, a die cushion cavity 31 is formed in the die cushion part 3, and the diversion cavity 21, the working cavity 11, the die surface cavity 12 and the die cushion cavity 31 are sequentially communicated along the material feeding direction.
The cross section shape of the working cavity 11 is consistent with that of the substrate of the inserting sheet radiator, the cross section of the inlet of the working cavity 11 is the same as that of the substrate of the inserting sheet radiator, the cross section area of the working cavity 11 is continuously increased along the material feeding direction, and the wall surface of the working cavity 11 forms an included angle of 1.5 degrees with the material feeding direction. The length of the working cavity 11 along the extending direction of the material is 20-25 mm.
When 6063 aluminum alloy is extruded, the high-temperature aluminum alloy cast ingot is subjected to plastic deformation under triple pressure effects of the extrusion cylinder, the extrusion rod and the guide plate, the guide plate is filled firstly and then is molded through the working belt of the face die, and then flows out of the die after passing through the supporting pad without obstacles, so that the deformation extrusion molding process of the aluminum alloy is completed.
The novel zero-clearance cutter structure is adopted at the working belt position of the face die, namely the 1.5-degree integral inclination is adopted, the flat working belt for forming is cancelled, and the forming part of the working belt and the clearance cutter are directly integrally processed, so that the forming can be processed and formed at one time through a slow-walking wire cutting device, the risk of local microcrack generated by electric spark machining is avoided, die collapse scrapping is avoided, the consistency of the performance of the working belt structure is effectively guaranteed, and the risk of surface quality defect of a product is reduced.
The surface die working belt is designed according to the standard of the size precision of the aluminum profile in the compression surface forming size, the longitudinal friction contact surface of the surface die working belt and the extrusion direction are in a 1.5-degree angle adduction structure, and when the aluminum alloy passes through the surface die working belt, the friction between the die and the aluminum alloy is reduced to the greatest extent while the size precision of the aluminum profile product is met, so that the surface quality of the aluminum profile is improved, and the service life of the die is prolonged.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (6)
1. An extrusion die for forming an insert radiator substrate comprises a die face portion (1), and a working cavity (11) and a die face cavity (12) which are formed in the die face portion (1), wherein the working cavity (11) is located at a feeding end of the die face portion (1), the die face cavity (12) is located at a discharging end of the die face portion (1), and the working cavity (11) is communicated with the die face cavity (12); the heat exchanger is characterized in that the cross section of the working cavity (11) is consistent with that of the substrate of the inserting sheet radiator, the cross section of the inlet of the working cavity (11) is the same as that of the substrate of the inserting sheet radiator, and the cross section area of the working cavity (11) is continuously increased along the material feeding direction.
2. The extrusion die for forming the substrate of the fin radiator according to claim 1, wherein the wall surface of the working cavity (11) forms an included angle of 1-2 degrees with the material feeding direction.
3. The extrusion die for forming the substrate of the fin radiator according to claim 1, wherein the length of the working cavity (11) along the extending direction of the material is 20-25 mm.
4. The extrusion die for forming the substrate of the fin radiator according to any one of claims 1 to 3, wherein the front end of the die face portion (1) along the material feeding direction is connected with a flow guide portion (2), the rear end of the die face portion (1) along the material feeding direction is connected with a die pad portion (3), a flow guide cavity (21) is formed in the flow guide portion (2), a die pad cavity (31) is formed in the die pad portion (3), and the flow guide cavity (21), the working cavity (11), the die face cavity (12) and the die pad cavity (31) are sequentially communicated.
5. The extrusion die for forming of tab heat sink substrates as recited in claim 4, wherein the die face cavities (12) comprise a primary die face cavity (121) in communication with the working cavity (11), and a secondary die face cavity (122) in communication with the die cushion cavity (31).
6. The extrusion die for forming the substrate of the fin radiator according to claim 4, wherein the flow guide part (2) and the die face part (1) and the die pad part (3) are connected through pin bolts in a locking manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010735370.5A CN111940527A (en) | 2020-07-28 | 2020-07-28 | Extrusion die for forming substrate of insert radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010735370.5A CN111940527A (en) | 2020-07-28 | 2020-07-28 | Extrusion die for forming substrate of insert radiator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111940527A true CN111940527A (en) | 2020-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010735370.5A Pending CN111940527A (en) | 2020-07-28 | 2020-07-28 | Extrusion die for forming substrate of insert radiator |
Country Status (1)
| Country | Link |
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| CN (1) | CN111940527A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002001423A (en) * | 2000-06-16 | 2002-01-08 | Showa Denko Kk | Die for extruder and method for manufacturing heat sink |
| US20040231390A1 (en) * | 2001-12-19 | 2004-11-25 | Makoto Fujioka | Extrusion tool, method for manufacturing shaped article with fins, and heat sink |
| CN1820866A (en) * | 2006-03-16 | 2006-08-23 | 江阴市江顺模具有限公司 | Hot extruding mould for gear shaping sheet heat radiator aluminium profile |
| CN102441583A (en) * | 2012-01-20 | 2012-05-09 | 惠州智科实业有限公司 | Aluminum extrusion mould without working zones |
| CN204396507U (en) * | 2014-11-25 | 2015-06-17 | 昆山国展金属工业有限公司 | High multiple fin the Aluminum-Extruding Die |
| CN105080990A (en) * | 2015-09-24 | 2015-11-25 | 江阴市江顺模具有限公司 | Zero working tape die |
| CN205110407U (en) * | 2015-10-20 | 2016-03-30 | 江阴市江顺模具有限公司 | Splint class section bar shelters from formula hot extrusion die |
| CN207756626U (en) * | 2018-01-23 | 2018-08-24 | 东莞市宏锦金属制品有限公司 | A kind of oblique empty knife cavity mould |
| CN207756627U (en) * | 2018-01-23 | 2018-08-24 | 东莞市宏锦金属制品有限公司 | A kind of aluminium alloy hot-extrusion die |
| CN109207755A (en) * | 2018-10-31 | 2019-01-15 | 辽宁忠旺集团有限公司 | A kind of 1 line aluminium alloy plank stuff production technology |
| CN109731941A (en) * | 2019-01-23 | 2019-05-10 | 广东坚美铝型材厂（集团）有限公司 | A kind of radiator mould work belt, work belt processing method and its radiator mould |
| CN110270605A (en) * | 2019-07-23 | 2019-09-24 | 锐新昌轻合金（常熟）有限公司 | A kind of high power tooth radiator extrusion die and extrusion process |
| CN213409855U (en) * | 2020-07-28 | 2021-06-11 | 湖南中创空天新材料股份有限公司 | Extrusion die |
-
2020
- 2020-07-28 CN CN202010735370.5A patent/CN111940527A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002001423A (en) * | 2000-06-16 | 2002-01-08 | Showa Denko Kk | Die for extruder and method for manufacturing heat sink |
| US20040231390A1 (en) * | 2001-12-19 | 2004-11-25 | Makoto Fujioka | Extrusion tool, method for manufacturing shaped article with fins, and heat sink |
| CN1820866A (en) * | 2006-03-16 | 2006-08-23 | 江阴市江顺模具有限公司 | Hot extruding mould for gear shaping sheet heat radiator aluminium profile |
| CN102441583A (en) * | 2012-01-20 | 2012-05-09 | 惠州智科实业有限公司 | Aluminum extrusion mould without working zones |
| CN204396507U (en) * | 2014-11-25 | 2015-06-17 | 昆山国展金属工业有限公司 | High multiple fin the Aluminum-Extruding Die |
| CN105080990A (en) * | 2015-09-24 | 2015-11-25 | 江阴市江顺模具有限公司 | Zero working tape die |
| CN205110407U (en) * | 2015-10-20 | 2016-03-30 | 江阴市江顺模具有限公司 | Splint class section bar shelters from formula hot extrusion die |
| CN207756626U (en) * | 2018-01-23 | 2018-08-24 | 东莞市宏锦金属制品有限公司 | A kind of oblique empty knife cavity mould |
| CN207756627U (en) * | 2018-01-23 | 2018-08-24 | 东莞市宏锦金属制品有限公司 | A kind of aluminium alloy hot-extrusion die |
| CN109207755A (en) * | 2018-10-31 | 2019-01-15 | 辽宁忠旺集团有限公司 | A kind of 1 line aluminium alloy plank stuff production technology |
| CN109731941A (en) * | 2019-01-23 | 2019-05-10 | 广东坚美铝型材厂（集团）有限公司 | A kind of radiator mould work belt, work belt processing method and its radiator mould |
| CN110270605A (en) * | 2019-07-23 | 2019-09-24 | 锐新昌轻合金（常熟）有限公司 | A kind of high power tooth radiator extrusion die and extrusion process |
| CN213409855U (en) * | 2020-07-28 | 2021-06-11 | 湖南中创空天新材料股份有限公司 | Extrusion die |
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Application publication date: 20201117 |