CN112296507B - Friction stir welding method for aluminum alloy water-cooled motor shell - Google Patents
Friction stir welding method for aluminum alloy water-cooled motor shell Download PDFInfo
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- CN112296507B CN112296507B CN202011198133.6A CN202011198133A CN112296507B CN 112296507 B CN112296507 B CN 112296507B CN 202011198133 A CN202011198133 A CN 202011198133A CN 112296507 B CN112296507 B CN 112296507B
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- friction stir
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- stir welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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Abstract
The invention belongs to the technical field of part welding, discloses a friction stir welding method for an aluminum alloy water-cooled motor shell, aims to solve the problem of repairing a keyhole after friction stir welding, and comprises the following steps: drilling a blind hole at the position of a threaded hole to be processed, which is between the adjacent ends of two sealing plates arranged on one side of the shell and paired with the shell and is superposed on the shell; respectively welding the two sealing plates by adopting friction stir welding according to a preset welding track, and enabling welding key holes of the two sealing plates to coincide with the blind hole; machining the blind hole into a threaded hole, and machining the rest threaded hole on the shell; and repeating the steps to process the other side of the shell. The method can avoid the problem of repairing the welded key hole of friction stir welding, effectively reduce the processing time, improve the production efficiency and ensure that the water-cooled motor shell obtains higher product quality and qualified rate after welding.
Description
Technical Field
The invention belongs to the technical field of part welding, and particularly relates to a friction stir welding method for an aluminum alloy water-cooled motor shell.
Background
As a novel solid phase connection technology, friction stir welding has the advantages of high quality, high efficiency, energy conservation, environmental friendliness and the like, and is successfully applied to the field of welding of aluminum alloys in recent years. However, when the friction stir welding is finished, a keyhole is left at the end of the welding seam, and the existence of the keyhole not only affects the aesthetic property of the surface of the welding seam, but also reduces the mechanical property of the welding seam to a certain extent. Therefore, in the engineering application process, the key hole is very necessary to be repaired. There are many kinds of repairing methods for the key hole at the welding position of friction stir welding, and the key hole is usually repaired by MIG TIG welding. However, the water-cooled motor shell has a working principle, a thick shell and a thin sealing plate. Defects such as air holes and holes are easy to appear in the repair welding process, the air tightness of the water-cooling motor shell is affected, the repair welding effect is not ideal, and the difficulty is increased for subsequent production.
Disclosure of Invention
In view of this, the invention aims to provide a friction stir welding method for an aluminum alloy water-cooled motor casing, which aims to solve the problem of repairing a keyhole after friction stir welding, so as to improve the product quality and the qualification rate of the water-cooled motor casing after welding and improve the production efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a friction stir welding method of an aluminum alloy water-cooled motor shell, which is used for welding a shell of the water-cooled motor shell and a pair of sealing plates which are respectively arranged at two sides of an upper water channel of the shell, and comprises the following steps: drilling a blind hole at the position of a threaded hole to be processed, which is between the adjacent ends of two sealing plates arranged on one side of the shell and paired with the shell and is superposed on the shell; respectively welding the two sealing plates by adopting friction stir welding according to a preset welding track, and enabling welding key holes of the two sealing plates to coincide with the blind hole; machining the blind hole into a threaded hole, and machining the rest threaded hole on the shell; and repeating the steps to process the other side of the shell.
Optionally, the diameter of the drilled blind hole is 4-6mm, and the depth of the blind hole is 1-2 mm.
Optionally, the surface of the housing is polished to metallic luster prior to assembly of the closure plates.
Optionally, the surface of the weld to be welded between the shell and the sealing plate is scrubbed by using absolute ethyl alcohol.
Optionally, the friction stir welding adopts laser tracking fixed-point welding, and welding parameters thereof include: the length of the stirring needle is 3.5-4.5mm, and the movement direction is anticlockwise; the stirring head is used for right-handed stirring, the rotating speed of the main shaft is 1100 plus 1300r/min, the welding speed is 680 plus 720mm/min, and the front inclination angle is 2-3 degrees.
Optionally, polishing to remove the welded surface burrs of the friction stir welding.
Optionally, the sealing plate is machined to remove the outer surface of the sealing plate by 1 mm.
The invention has the beneficial effects that: according to the method, the blind hole is machined at the position of the threaded hole on the end face of the shell of the water-cooled motor shell according to the product drawing, the welding receiving hole of the friction stir welding is overlapped with the blind hole, and the blind hole is used for machining the threaded hole required by the drawing paper and the requirements on the flatness of the end face of the shell and the like, so that the problem of repairing the key hole can be avoided, the machining time is effectively reduced, the production efficiency is improved, and the water-cooled motor shell can obtain higher product quality and qualified rate after being welded.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a top view of the end face of a water-cooled motor casing according to the present invention.
Fig. 2 is a top view of the water-cooled motor casing with a positioning hole sealing plate.
Fig. 3 is a welding trace diagram of the water channel upper closing plate of the water-cooled motor casing according to the present invention.
Fig. 4 is a partially enlarged view of fig. 3.
Reference numerals: 1 is a shell, 2 is a water channel, 3 is a blind hole, 4 is a sealing plate and 5 is a threaded hole.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The aluminum alloy water-cooled motor casing that this embodiment relates to is including casing 1, locate water course 2 on casing 1 and be used for covering a pair of shrouding 4 on water course 2 both sides respectively, and the internal diameter of its casing is 375mm, and the external diameter is 444mm, and the shrouding width is 20mm, and thickness is 4 mm. The cross section of one side of the shell consists of two seal plates, and 12 threaded holes are machined in the cross section subsequently. Therefore, the water-cooled motor shell is welded by adopting a full friction stir welding technology instead of the traditional arc welding fusion welding, and the welding defects, such as air holes, slag inclusion and the like, generated by the traditional welding method can greatly influence the post-welding quality of the water-cooled motor shell due to the special working principle and the special requirement on the air tightness of the container of the water-cooled motor shell. And the welding strength can be improved to the maximum extent by adopting the friction stir welding technology.
As shown in fig. 1-4, specifically, a shell 1 of a water-cooled motor shell is firstly assembled with two sealing plates 4 on a corresponding water channel 2, and a blind hole 3 with the processing depth of 1.5mm and the diameter of 5mm is drilled by selecting the position of a threaded hole 5 to be processed between the adjacent ends of the two sealing plates 4 and overlapping the adjacent ends of the shell 1, so that the position of a key hole of the friction stir welding can be determined during the welding, and the blind hole 3 can be overlapped with the position of the key hole during the subsequent welding; polishing the shell until the metal luster appears, and scrubbing the surface of a welding line by using absolute ethyl alcohol to be welded; welding according to a preset welding track, welding the two sealing plates 4 on the corresponding water channel 2, and leaving the welding key holes of the two sealing plates at the positions of the blind holes 3 to be processed before, wherein the weld penetration is 4.3 mm; the welding direction is anticlockwise, makes the shrouding in the welded side of advancing, and during the welding, the fixed point welding is adopted in the friction stir welding to the friction stir welding, and welding parameter is: the length of a stirring needle is 4.0mm, a right spiral stirring head is adopted, the rotating speed of a main shaft is 1200r/min, and the welding speed is 700 mm/min; the anteversion angle is 2.5 degrees, and the motion direction of the stirring pin is anticlockwise; then, a pneumatic angle grinder is used for polishing surface burrs generated on the welded surface, then the end face of the shell 1 is machined integrally to remove 1mm, the weld penetration is 3.3mm, and the requirements of flatness and the like of the end face of the water-cooled motor shell can be effectively met; then, a blind hole 3 (a key hole) in front of the end face of the shell 1 is reamed according to a product drawing, and then thread machining is carried out; machining the rest threaded holes 5 on the shell, namely machining the threaded holes with the diameter of M8 multiplied by 1.25 and the number of 12; and finally, repeating the steps and carrying out the same processing operation on the other side of the shell.
Therefore, according to the method, the blind hole is machined at the position of the threaded hole in the end face of the shell of the water-cooled motor shell according to the product drawing, the welding receiving hole of the friction stir welding is overlapped with the blind hole, and the blind hole is subsequently used for machining the threaded hole required by the drawing paper and the requirements of the flatness of the end face of the shell and the like, so that the problem of repairing the key hole can be avoided, the machining time is effectively reduced, the production efficiency is improved, and the water-cooled motor shell can obtain higher product quality and qualified rate after being welded.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (7)
1. The utility model provides an aluminum alloy water cooled machine shell friction stir welding method for to the casing (1) of water cooled machine shell with a pair of shrouding (4) that this casing water supply (2) both sides were divided implement the welding, its characterized in that includes:
b1, drilling a blind hole (3) at the position of a threaded hole (5) to be processed, which is selected between the adjacent ends of two sealing plates paired on one side of the shell and is superposed on the shell;
b2, respectively welding the two sealing plates by friction stir welding according to a preset welding track, and enabling welding key holes of the two sealing plates to coincide with the blind hole;
b3, machining the blind hole into a threaded hole, and machining the rest threaded hole on the shell;
b4, repeating the steps B1-B3, and processing the other side of the shell.
2. The friction stir welding method of the aluminum alloy water-cooled motor casing according to claim 1, wherein the bore diameter of the drilled blind hole is 4-6mm, and the bore depth is 1-2 mm.
3. The friction stir welding method of the aluminum alloy water-cooled motor casing as recited in claim 1, wherein the surface of the casing is polished to metallic luster before the sealing plate fitting.
4. The friction stir welding method of the aluminum alloy water-cooled motor casing according to claim 1, wherein the surface of the weld to be welded between the casing and the closing plate is scrubbed with absolute ethyl alcohol.
5. The friction stir welding method of the aluminum alloy water-cooled motor casing according to claim 1, wherein the friction stir welding is laser tracking spot welding, and welding parameters thereof include: the length of the stirring needle is 3.5-4.5mm, and the movement direction is anticlockwise; the stirring head is used for right-handed stirring, the rotating speed of the main shaft is 1100 plus 1300r/min, the welding speed is 680 plus 720mm/min, and the front inclination angle is 2-3 degrees.
6. The friction stir welding method of the aluminum alloy water-cooled motor casing according to claim 1, wherein burrs on the welded surface of the friction stir welding are removed by grinding.
7. The friction stir welding method of the aluminum alloy water-cooled motor casing as recited in claim 1, wherein the sealing plate is machined to a depth of 1mm from the outer surface thereof.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011198133.6A CN112296507B (en) | 2020-10-30 | 2020-10-30 | Friction stir welding method for aluminum alloy water-cooled motor shell |
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| CN202011198133.6A CN112296507B (en) | 2020-10-30 | 2020-10-30 | Friction stir welding method for aluminum alloy water-cooled motor shell |
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| CN112296507A CN112296507A (en) | 2021-02-02 |
| CN112296507B true CN112296507B (en) | 2022-03-25 |
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| CN113664363A (en) * | 2021-09-02 | 2021-11-19 | 中色（天津）特种材料有限公司 | Special-shaped track welding method for end face of water-cooled motor shell |
| CN115502545A (en) * | 2022-11-15 | 2022-12-23 | 江苏攀森智能科技有限公司 | Friction welding processing technology for water channel of driving motor shell |
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| JP5915042B2 (en) * | 2011-09-12 | 2016-05-11 | 株式会社ジェイテクト | Friction joint structure and pump device |
| CN105290607B (en) * | 2015-12-02 | 2017-12-19 | 北京航天新风机械设备有限责任公司 | A kind of stirring-head of aluminum alloy lapped structure friction stir spot welding |
| WO2020006806A1 (en) * | 2018-07-02 | 2020-01-09 | 精进电动科技股份有限公司 | Method for sealing and welding cooling water channel of electric motor housing |
| CN109807568A (en) * | 2019-03-20 | 2019-05-28 | 江阴海虹精密机械有限公司 | Tenui-exinous motor casing stirring friction-welding technique |
| CN210387931U (en) * | 2019-07-30 | 2020-04-24 | 航天工程装备（苏州）有限公司 | Stirring head for friction stir welding of water-cooled motor shell |
| CN110666464A (en) * | 2019-10-30 | 2020-01-10 | 辽宁忠旺铝合金精深加工有限公司 | Friction stir welding process for thin-wall motor casing |
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