CN111230188A - Stirring head for friction stir manufacturing and method for preparing water cooling channel by using stirring head - Google Patents
Stirring head for friction stir manufacturing and method for preparing water cooling channel by using stirring head Download PDFInfo
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- CN111230188A CN111230188A CN202010065217.6A CN202010065217A CN111230188A CN 111230188 A CN111230188 A CN 111230188A CN 202010065217 A CN202010065217 A CN 202010065217A CN 111230188 A CN111230188 A CN 111230188A
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- water
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- stirring
- handed thread
- cooling channel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/04—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/21—Copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/28—Details of hard metal, i.e. cemented carbide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/32—Details of high speed steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/76—Silver
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/84—Steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/18—Ceramic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a stirring head for friction stir manufacturing and a method for preparing a water cooling channel by applying the stirring head, and belongs to the technical field of water cooling plate manufacturing. The invention solves the problems that the existing water cooling plate preparation process is time-consuming and labor-consuming, has high processing difficulty and is easy to cause water leakage due to the defects in the welding process. The invention provides a stirring head, wherein a stirring pin of the stirring head is of an integrally formed structure and sequentially comprises a left-handed thread circular table, a boss and a right-handed thread circular table from top to bottom. This stirring head can realize carrying out the integral type processing of water-cooling channel to water-cooling plate blank, directly obtains one continuous controllable water-cooling channel on water-cooling plate blank, need not extra welding step, does not have the risk of revealing, and the security is high. Meanwhile, the method has the advantages of simple process, low cost, high volume-to-volume ratio of the water cooling channel, large heat dissipation area, good cooling performance and good repeatability.
Description
Technical Field
The invention relates to a stirring head for friction stir manufacturing and a method for preparing a water cooling channel by applying the stirring head, and belongs to the technical field of water cooling plate manufacturing.
Background
Along with the rapid development of new energy automobile technology, the power lithium battery is widely applied to the production and manufacturing of electric automobiles. Due to the application scene requirements, the power lithium battery is used as a mobile energy source, and the requirements on the volume and the energy density are as high as possible on the premise of safety, so that the more durable cruising ability is achieved. Meanwhile, users of new energy vehicles also want to be able to safely and quickly charge, which causes the energy density and the dissipated power of the whole battery system to be increased sharply. The battery pack under the requirement of high density and high charge rate brings a severe heat management problem, and researches show that the heat dissipation is important in various factors influencing the reliability of a power battery pack system, and the heat dissipation is often improved by matching with a water cooling plate.
The existing water cooling plate is assembled by adopting a structure combined from top to bottom, the interface of the existing water cooling plate and the existing water cooling plate needs to be sealed in a large area, welding modes such as brazing, argon arc welding and the like need to be introduced in the process so as to avoid the problem of water leakage, the process is time-consuming and labor-consuming, the processing difficulty is high, and the risk of water leakage is easily caused by the defect problem possibly occurring in the welding process. In addition, the water-cooling plate is further processed and manufactured in a mode of plugging after drilling, the water-cooling channel is usually longer, the performance requirement on a drill bit is extremely high, high processing cost is brought, most of processed water-cooling channels are round holes, the heat dissipation area is limited, and the water-cooling plate is not suitable for the processing requirement of large-size large-scale water-cooling plates. Therefore, it is necessary to provide a novel method for preparing a water cooling channel.
Disclosure of Invention
In order to solve the preparation problem of the water-cooling plate, the invention provides a water-cooling channel preparation process based on a friction stir principle, which has the advantages of simple process, good cooling effect, good sealing performance and good repeatability, and a corresponding stirring head manufactured by friction stir.
The technical scheme of the invention is as follows:
a stirring head for friction stir manufacturing comprises an upper mounting body 1 and a lower stirring body 2, wherein the upper mounting body 1 and the lower stirring body 2 are of an integrally formed structure, the upper mounting body 1 is a cylinder, and a clamping mounting surface 1-1 is arranged on the cylinder; the lower stirring body 2 comprises a shaft shoulder 2-1 and a stirring pin 2-2, the upper end surface and the lower end surface of the shaft shoulder 2-1 are respectively connected with the lower end surface of the upper mounting body 1 and the upper end surface of the stirring pin 2-2, and the lower end surface of the shaft shoulder 2-1 is in an outward convex arc shape; the stirring pin 2-2 is of an integrally formed structure and sequentially comprises a left-handed thread circular truncated cone 2-2-1, a boss 2-2-2 and a right-handed thread circular truncated cone 2-2-3 from top to bottom.
Further limiting, the diameter D of the cross section of the lower end of the shaft shoulder 2-1 is 10 mm-30 mm, and the convex angle theta of the lower end surface of the shaft shoulder 2-12Is 0 to 20 degrees.
Further limiting, the diameter d of the connecting part of the stirring pin 2-2 and the shaft shoulder 2-11Is 0.2 to 0.5 times of the diameter D of the cross section at the lower end of the shaft shoulder 2-1.
Further limiting, the axial length of the stirring pin 2-2 is L1，L1The value range of (A) is 3 mm-10 mm.
Further defining the diameter d of the boss 2-2-22Is 0.4 to 0.8 times of the diameter D of the cross section of the lower end of the shaft shoulder 2-1, and D2Not less than diameter d1Height L of boss2Is L10.2 to 0.5 times the length.
Further limiting, the left-handed thread round platform 2-2-1 is formed by forming a left-handed thread on the conical surface of a conical platform, the thread pitch of the left-handed thread is 0.3 mm-1 mm, the right-handed thread round platform 2-2-3 is formed by forming a right-handed thread on the conical surface of the conical platform, the thread pitch of the right-handed thread is 0.3 mm-1 mm, the thread pitch of the left-handed thread round platform 2-2-1 is equal to the thread pitch of the right-handed thread round platform 2-2-3, and the included angles between the rotating shafts of the left-handed thread round platform 2-2-1 and the right-handed thread round platform 2-21，θ1The value range of (A) is 5-15 degrees.
Further limiting, the material of the stirring head is hot die steel, high-speed steel, hard alloy or ceramic.
The method for preparing the water cooling channel by using the stirring head comprises the following specific operation processes: and the stirring head enters the water-cooling plate blank 3 from the side edge of the water-cooling plate blank 3 along the inlet of the water-cooling channel at the rotating speed of 50-10000rpm, the edge of the lower end face of the shaft shoulder 2-1 is 0.05-0.3 mm higher than the upper surface of the water-cooling plate blank, the feeding speed of the stirring head is 50-3000 mm/min, and finally the water-cooling plate blank is withdrawn from the outlet of the water-cooling channel to finish the processing of the water-cooling channel 4 on the water-cooling plate blank 3.
Further defined, the water-cooled slab 3 is a plate prepared by casting, machining or extrusion.
Further, the material of the water-cooled plate blank 3 is aluminum, aluminum alloy, copper alloy, silver or silver alloy.
The invention has the following beneficial effects: the invention adopts the stirring head to carry out integrated processing of the water cooling channel on the water cooling plate blank, the left-handed thread round table of the stirring head exerts an upward flowing effect on the material when the stirring head rotates anticlockwise, the boss exerts an effect of flowing away from the axis on the material when the stirring head rotates anticlockwise, and the right-handed thread round table exerts a downward flowing effect on the material when the stirring head rotates anticlockwise. Meanwhile, the method has the advantages of simple process, low cost, high volume-to-volume ratio of the water cooling channel, large heat dissipation area, good cooling performance and good repeatability.
Drawings
FIG. 1 is a schematic structural view of a stirring head;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a schematic diagram of a working process of a stirring head for preparing a water cooling channel on a water cooling plate blank;
FIG. 4 is a schematic view showing the local flow behavior of the material during the operation of the stirring head for preparing the water cooling channel on the water cooling plate blank;
in the figure, 1-an installation body, 2-a lower stirring body, 3-a water-cooling plate blank, 4-a water-cooling channel, 5-a material discharge area, 1-1-a clamping installation surface, 2-1-a shaft shoulder, 2-2-a stirring pin, 2-2-1-a left-handed thread circular truncated cone, 2-2-2-a boss and 2-2-3-a right-handed thread circular truncated cone.
Detailed Description
The experimental procedures used in the following examples are conventional unless otherwise specified. The materials, reagents, methods and apparatus used, unless otherwise specified, are conventional in the art and are commercially available to those skilled in the art.
Embodiment mode 1: as shown in fig. 1 and 2, the stirring head of the present invention comprises an upper mounting body 1 and a lower stirring body 2, wherein the upper mounting body 1 and the lower stirring body 2 are of an integrally formed structure, the upper mounting body 1 is a cylinder, and a clamping mounting surface 1-1 is arranged on the cylinder; the lower stirring body 2 comprises a shaft shoulder 2-1 and a stirring pin 2-2, the upper end surface and the lower end surface of the shaft shoulder 2-1 are respectively connected with the lower end surface of the upper mounting body 1 and the upper end surface of the stirring pin 2-2, and the lower end surface of the shaft shoulder 2-1 is in an outward convex arc shape; the stirring pin 2-2 is of an integrally formed structure and sequentially comprises a left-handed thread circular truncated cone 2-2-1, a boss 2-2-2 and a right-handed thread circular truncated cone 2-2-3 from top to bottom. According to the arrangement, the left-handed thread round table 2-2-1 exerts an upward flowing effect on the material when the stirring head rotates anticlockwise, the boss 2-2-2 exerts an effect of far away from the axis to flow on the material when the stirring head rotates anticlockwise, the right-handed thread round table 2-2-3 exerts a downward flowing effect on the material when the stirring head rotates anticlockwise, the three effects are combined in the stirring friction process, so that the thermoplastic water cooling plate material is far away from the central area of the stirring needle, meanwhile, redundant material is discharged in a flash or scrap form from the edge of the shaft shoulder 2-1, a continuous controllable water cooling channel is formed, and finally, the integrated manufacturing of the water cooling plate is realized.
Wherein the diameter D of the cross section of the lower end of the shaft shoulder 2-1 of the stirring head is 20mm, and the convex angle theta of the lower end surface of the shaft shoulder 2-12Is 10 deg.. Diameter d of the joint of the stirring pin 2-2 and the shaft shoulder 2-11Is 8mm, and the axial length of the stirring pin 2-2 is L1Is 8mm, the diameter d of the boss is 2-2-22Is 12mm, and the height L of the boss22mm, the left-hand thread pitch of the left-hand thread round platform 2-2-1 is 0.75mm, and the right-hand thread pitch of the right-hand thread round platform 2-2-3The thread pitch of the thread is 0.75mm, and the included angles between the rotating shafts of the left-handed thread round platform 2-2-1 and the right-handed thread round platform 2-2-3 and the generatrix are all theta when the included angles are the same115 degrees, the material of the stirring head is hot-work die steel.
Embodiment mode 2: the stirring head of the embodiment 1 is applied to processing a water-cooling channel on a water-cooling plate blank, and the specific processing process comprises the following steps: as shown in fig. 3 and 4, on the surface of a water-cooling plate blank prepared in advance, a stirring head enters the water-cooling plate blank along the inlet of a water-cooling channel laterally at the rotating speed of 1200rpm, wherein the edge of a shaft shoulder 2-1 is 0.15mm higher than the upper surface of the water-cooling plate, so that redundant materials are discharged from the edge of the shaft shoulder 2-1 in the form of flash or scraps, and meanwhile, the stirring head moves along the shape of the required water-cooling channel at the advancing speed v of 2000mm/min and finally exits from the outlet of the water-cooling channel, so that a continuous controllable water-cooling channel structure is realized; and (4) polishing and cleaning the inlet and the outlet of the water-cooling channel and the upper surface of the water-cooling plate, and washing the inside of the water-cooling channel to obtain the required water-cooling plate.
Claims (10)
1. A stirring head for friction stir manufacturing is characterized by comprising an upper mounting body (1) and a lower stirring body (2), wherein the upper mounting body (1) and the lower stirring body (2) are of an integrally formed structure, the upper mounting body (1) is a cylinder, and a clamping mounting surface (1-1) is arranged on the cylindrical surface; the lower stirring body (2) comprises a shaft shoulder (2-1) and a stirring needle (2-2), the upper end surface and the lower end surface of the shaft shoulder (2-1) are respectively connected with the lower end surface of the upper mounting body (1) and the upper end surface of the stirring needle (2-2), and the lower end surface of the shaft shoulder (2-1) is in an outer convex arc shape; the stirring pin (2-2) is of an integrally formed structure and sequentially comprises a left-handed thread round table (2-2-1), a boss (2-2-2) and a right-handed thread round table (2-2-3) from top to bottom.
2. The stirring head for friction stir manufacturing according to claim 1, wherein the cross-sectional diameter D of the lower end of the shoulder (2-1) is 10mm to 30mm, and the outward convex angle θ of the lower end surface of the shoulder (2-1)2Is 0 to 20 degrees.
3. A method as claimed in claim 2The stirring head for friction stir manufacturing is characterized in that the diameter d of the joint of the stirring needle (2-2) and the shaft shoulder (2-1)1Is 0.2 to 0.5 times of the diameter D of the cross section of the lower end of the shaft shoulder (2-1).
4. Head for friction stir manufacturing according to claim 3, characterized in that said needles (2-2) have an axial length L1，L1The value range of (A) is 3 mm-10 mm.
5. A pin for friction stir manufacturing according to claim 4 wherein said boss (2-2-2) has a diameter d2Is 0.4 to 0.8 times of the diameter D of the cross section of the lower end of the shaft shoulder (2-1), and D2Not less than diameter d1Height L of boss2Is L10.2 to 0.5 times the length.
6. The stirring head for friction stir manufacturing according to claim 5, wherein the left-handed thread round table (2-2-1) is formed by forming a left-handed thread on the conical surface of a cone table, the pitch of the left-handed thread is 0.3mm to 1mm, the right-handed thread round table (2-2-3) is formed by forming a right-handed thread on the conical surface of a cone table, the pitch of the right-handed thread is 0.3mm to 1mm, the pitch of the left-handed thread round table (2-2-1) is equal to the pitch of the right-handed thread round table (2-2-3), and the included angles between the rotating shafts of the left-handed thread round table (2-2-1) and the right-handed thread round table (2-2-3) and the generatrix are all the same as θ1，θ1The value range of (A) is 5-15 degrees.
7. The pin tool of claim 1, wherein the pin tool is made of hot die steel, high speed steel, cemented carbide, or ceramic.
8. The method for preparing the water cooling channel by using the stirring head as claimed in claim 1 is characterized by comprising the following specific operation processes: and the stirring head enters the water-cooling plate blank (3) from the side edge of the water-cooling plate blank (3) along the inlet of the water-cooling channel at the rotating speed of 50-10000rpm, the edge of the lower end surface of the shaft shoulder (2-1) is 0.05-0.3 mm higher than the upper surface of the water-cooling plate blank, the advancing speed of the stirring head is 50-3000 mm/min, and finally the water-cooling plate blank is withdrawn from the outlet of the water-cooling channel, so that the processing of the water-cooling channel (4) on the water-cooling plate blank (3) is finished.
9. The method for preparing the water cooling channel by the stirring head as recited in claim 8, wherein the water cooling plate blank (3) is a plate prepared by casting, machining or extrusion forming.
10. The method for preparing the water cooling channel by the stirring head as recited in claim 9, wherein the material of the water cooling plate blank 3 is aluminum, aluminum alloy, copper alloy, silver or silver alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010065217.6A CN111230188A (en) | 2020-01-20 | 2020-01-20 | Stirring head for friction stir manufacturing and method for preparing water cooling channel by using stirring head |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010065217.6A CN111230188A (en) | 2020-01-20 | 2020-01-20 | Stirring head for friction stir manufacturing and method for preparing water cooling channel by using stirring head |
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| CN202010065217.6A Pending CN111230188A (en) | 2020-01-20 | 2020-01-20 | Stirring head for friction stir manufacturing and method for preparing water cooling channel by using stirring head |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798930A (en) * | 2021-09-23 | 2021-12-17 | 天津大学 | High-precision metal mirror surface machining method based on stirring friction treatment |
| CN115213546A (en) * | 2022-08-12 | 2022-10-21 | 燕山大学 | Tool for forming and processing heat dissipation pore in metal and friction stir welding equipment |
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| CN105689885A (en) * | 2016-04-14 | 2016-06-22 | 江苏科技大学 | Double-shaft-shoulder stir friction head water-cooling cooling device and stir friction welding device and method |
| CN207038664U (en) * | 2017-06-30 | 2018-02-23 | 李树成 | A kind of new-energy automobile and its battery cooled plate structure |
| CN109434273A (en) * | 2018-12-24 | 2019-03-08 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of tool and method manufacturing micro-channel |
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| CN110640295A (en) * | 2019-09-26 | 2020-01-03 | 沈阳航空航天大学 | Stirring head and method for repairing friction stir welding of threaded hole |
| CN110640296A (en) * | 2019-09-26 | 2020-01-03 | 沈阳航空航天大学 | Friction stir welding stirring head capable of improving material flowing behavior |
-
2020
- 2020-01-20 CN CN202010065217.6A patent/CN111230188A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6029879A (en) * | 1997-09-23 | 2000-02-29 | Cocks; Elijah E. | Enantiomorphic friction-stir welding probe |
| CN103817428A (en) * | 2009-06-01 | 2014-05-28 | 日本轻金属株式会社 | Welding method |
| CN105689885A (en) * | 2016-04-14 | 2016-06-22 | 江苏科技大学 | Double-shaft-shoulder stir friction head water-cooling cooling device and stir friction welding device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798930A (en) * | 2021-09-23 | 2021-12-17 | 天津大学 | High-precision metal mirror surface machining method based on stirring friction treatment |
| CN115213546A (en) * | 2022-08-12 | 2022-10-21 | 燕山大学 | Tool for forming and processing heat dissipation pore in metal and friction stir welding equipment |
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Application publication date: 20200605 |