CN109807568A - Tenui-exinous motor casing stirring friction-welding technique - Google Patents
Tenui-exinous motor casing stirring friction-welding technique Download PDFInfo
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- CN109807568A CN109807568A CN201910214791.0A CN201910214791A CN109807568A CN 109807568 A CN109807568 A CN 109807568A CN 201910214791 A CN201910214791 A CN 201910214791A CN 109807568 A CN109807568 A CN 109807568A
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Abstract
The invention belongs to the technical fields of water cooled machine shell processing, disclose a kind of tenui-exinous motor casing stirring friction-welding technique, its key points of the technical solution are that including molding casing blank, step machining, forming cover board, form clip, assemble cover board and carry out Friction Stir Welding, with in the case where housing exterior walls are with a thickness of 4mm, the effect that cover board is successfully welded in step using the stirring-head of conventional 4-10, and housing exterior walls can effectively be avoided to deform or collapse.
Description
Technical field
The present invention relates to the technical field of water cooled machine shell processing, in particular to a kind of tenui-exinous motor casing agitating frictions
Welding procedure.
Background technique
Agitating friction weldering is a relatively advanced welding procedure, is generated using high-speed rotating soldering set and friction of workpiece
Heat makes materials to be welded local plastic.When soldering set is moved forward along weld interface, by the material of plastification in soldering set
Under rotation friction effect posteriorly by the frontal flow of soldering set, and fine and close solid phase weld seam is formed under the extruding of soldering set.
Compared with traditional welding method, agitating friction soldering set has weld strength height, welding point flat appearance, postwelding residual
The advantages that residue stress is small, deformation is small, pollution-free, energy-efficient is known as " the environmentally protective welding skill of high quality, low cost
Art ".And aluminium alloy water cooling motor housing is more demanding for the welding quality of water channel end face, it is desirable that face of weld is smooth, leakproofness
Well, microstructure is uniform, does not allow gas hole defect occur, therefore the water channel welding of water cooling motor housing mostly uses greatly agitating friction
Weldering.
As Chinese patent that publication No. is CN106181268A disclose a kind of new-energy automobile water-cooled motor case and
Its friction welding technological, water-cooled motor case include motor housing, and cooling water channel is equipped with inside motor housing, and cooling water channel is
Spiral channel is equipped with water channel slot in motor case outer surface, and the length of water channel slot is consistent with motor case axis direction, water channel slot
Bottom be equipped with the consistent hole of spiral channel circle number, each hole be connected to spiral channel, and water channel slot and cover board cooperation rub
Welding are as follows: agitating friction weldering special plane machining blanks welding surface-punching press cover board-welding-test air-tightness-turns following process
Process is to warehousing finished products.
Motor case in this new-energy automobile water-cooled motor case and its friction welding technological is not only simple in structure, and
And it is conveniently used for electric motor temperature reduction, the cooling efficiency of motor is improved, effectively prevent the generation of water leakage situation between adjacent water channel, simultaneously
Welding procedure, which saves, beats the processes such as groove and cleaning interface, reduces live turnover, improves production efficiency, reduces production
Cost.
The casing blank of existing a kind of water cooled machine, as shown in Figure 1, it includes cylinder shell 1, the outside of shell 1
Wall is equipped with eight reinforcing ribs 2, and reinforcing rib 2 and is uniformly distributed around 1 axis of shell along the elongated setting of axis direction of shell 1.
Eight sinks 3 are offered in the wall thickness of shell 1, sink 3 is located at two neighboring along the elongated setting of axis direction of shell 1
Between reinforcing rib 2, cross section is arc-shaped.
The housing outer diameter of this casing blank is 240mm, overall thickness 17mm.Wherein, the groove width of sink is 6mm, sink
Inner wall thickness at place is 7mm, and outer wall thickness is then 4mm.In addition, being between two sidewalls adjacent with shell on reinforcing rib
The junction of 45 ° of angles, reinforcing rib and shell is equipped with chamfering, and chamfer radius is 8mm, and reinforcing rib is backwards to the two sides of shell
Equipped with chamfering, and chamfer radius is 5mm.
Said machine casing blank needs to be further processed, and as shown in Figures 2 and 3, offers at the top of the lateral wall of shell 1 into water
Mouth 4 and water outlet 5, the two are connected to two adjacent sinks 3 respectively.1 both ends of shell then offer arc-shaped step 6 respectively, remove
Water inlet 4 and water outlet 5 position, each step 6 is across twice sink 3 and a reinforcing rib 2, and 1 both ends of shell
Step 6 is staggered.6 depth of step is 7mm, is inside welded with the cover board 7 with a thickness of 7mm, 6 bottom of step and 2 phase of reinforcing rib
Pair position offer through-hole 10, one end of two neighboring sink 3 is connected to.Each sink 3 is contacted from beginning to end, cooperates 4 He of water inlet
Water outlet 5 ultimately forms complete water channel.
When being welded on cover board in step using agitating friction weldering, if using stirring-head (the mixing needle length H of routine 4-10
=4mm, shaft shoulder diameter D=10mm), theoretically motor casing outer wall thickness at least needs 5mm.Forging force when because of Friction Stir Welding
Up to 3~6KN at least needs to prevent motor casing outer wall to be squeezed and deformed even be collapsed, motor casing outer wall thickness by stirring-head
7mm。
In the case where housing exterior walls thickness only has 4mm, the stirring-head of conventional 4-10 can not be successfully welded cover plate, outside shell
Wall.If the outer wall thickness of motor casing is increased to 7mm or more, the total weight of motor casing is increased, and new-energy automobile is to vehicle
The control of body weight is more stringent, increases motor casing weight and is unfavorable for vehicle body Reduction of Students' Study Load.According to the smaller stirring-head of the shaft shoulder, then can
Welding efficiency is substantially reduced, and the service life of small-sized stirring-head is short.
Summary of the invention
The object of the present invention is to provide a kind of tenui-exinous motor casing stirring friction-welding techniques, have in housing exterior walls thickness
In the case where for 4mm, cover board is successfully welded in step using the stirring-head of conventional 4-10, and can effectively avoid outside shell
The advantages of wall is deformed or is collapsed.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of tenui-exinous motor casing stirring friction-welding technique, the specific steps are as follows:
S1: molding casing blank, including shell, sink and reinforcing rib；
S2: step, inlet and outlet are processed on casing blank；
S3: molding cover board；
S4: molding clip, in a ring, the internal diameter of clip is not less than the outer diameter of shell to the clip, opens up on the inner sidewall of clip
There is the holding tank for accommodating reinforcing rib；
S5: by cover board assembly in step, by hoop sleeve on shell, and the two is fixed by clamping tooling, is then carried out
Friction stir weld, depth of weld 4mm.
By using above-mentioned technical proposal, when carrying out friction stir weld, solid clip wales shell, and mixing needle is squeezed into
Between cover board and inner walls and housing exterior walls, inner walls are inwardly pushed up, housing exterior walls are pushed up outward, wherein inner walls
With a thickness of 7mm, there is enough compression strength, housing exterior walls are then close to the inner wall of clip, when housing exterior walls are outwardly convex
When playing the trend of deformation, stopped by clip inner wall, only needs clip that there is enough structural strengths, housing exterior walls can be formed
Stable support prevents it from deforming or collapse；In the case where housing exterior walls are with a thickness of 4mm, using the stirring of conventional 4-10
Cover board is successfully welded in step by head, and housing exterior walls can effectively be avoided to deform or collapse.
Further, chamfering is equipped at the slot bottom and notch of the holding tank.
By using above-mentioned technical proposal, the chamfering in chamfering, with reinforcing rib is set at the slot bottom and notch of holding tank
Agree with, clip is enable to avoid reinforcing rib, be preferably bonded with housing exterior walls, thus steadily supporing shell outer wall.
Further, the radius of chamfering is 7.85mm at the holding tank notch.
By using above-mentioned technical proposal, when reinforcing rib is in holding tank, with the junction of shell and holding tank
Notch contact, sets 7.85mm for the radius of chamfering at holding tank notch, is slightly less than reinforcing rib and housing junction chamfering
Radius, due to reinforcing rib and housing junction indent, therefore there are certain gaps between clip and shell, reserve for shell certain
Deformation space, after avoiding shell from lying directly against clip, by clip spalling, and the deflection of shell is smaller, can be in itself elasticity
Lower recovery；Since processing technology is limited, often there is certain error in machine-shaping in clip and shell, if by clip and shell
It is sized to agree with completely, once there is the situation that clip internal diameter is less than normal or housing outer diameter is bigger than normal, then will lead to clip
It can not be successfully and cover in hull outside.
Further, the radius of chamfering is 5.15mm at the holding tank slot bottom.
By using above-mentioned technical proposal, when reinforcing rib is in holding tank, the slot backwards to shell side and holding tank
Bottom contact, sets 5.15mm for the radius of chamfering at holding tank notch, falls at the two sides of shell slightly larger than reinforcing rib
The radius at angle, since reinforcing rib is backwards to the two sides evagination of shell, therefore there are certain gaps between clip and reinforcing rib, are shell
Certain deformation space is reserved with reinforcing rib, after avoiding reinforcing rib from lying directly against clip, by clip spalling, and shell and reinforcing rib
Deflection it is smaller, can restore under the elasticity of itself；Since processing technology is limited, clip and reinforcing rib are past in machine-shaping
Toward there are certain errors, if clip and reinforcing rib are sized to agree with completely, once occur clip internal diameter it is less than normal or
Reinforcing rib outer diameter situation bigger than normal, then will lead to clip and can not be successfully and cover in hull outside.
Further, the internal diameter of the clip is 240.3mm.
By using above-mentioned technical proposal, the internal diameter of clip is slightly larger than housing outer diameter, and it is empty to reserve certain deformation for shell
Between, after avoiding shell from lying directly against clip, by clip spalling, and the deflection of shell is smaller, can restore under the elasticity of itself；
Since processing technology is limited, often there is certain error in machine-shaping in clip and shell, if by the size of clip and shell
It is set as agreeing with completely, once there is the situation that clip internal diameter is less than normal or housing outer diameter is bigger than normal, then will lead to clip can not be suitable
Benefit is covered in hull outside.
Further, the clip is made of two symmetrically arranged half hoops.
By using above-mentioned technical proposal, clip is spliced by two half hoops, and when welding is fixed by clamping tooling respectively,
It can be quickly and conveniently by hoop sleeve on shell.
Further, in welding process, stirring-head rolls tiltedly towards revolution, and between the axis of stirring-head and weld seam vertical line
Angle be 3 °.
By using above-mentioned technical proposal, stirring-head rolls tiltedly towards revolution, so that before the aluminium alloy of softening concentrates flow direction
Diffuse to entire weld seam into side, and from the side, aluminium alloy again curing molding when it is more uniform, each interregional connection in commissure is steady
Fixed, internal flaw is few.
Further, the rotation speed of stirring-head is between 1600~2000r/min, and movement speed is in 400~600mm/
Between min.
By using above-mentioned technical proposal, between 1600~2000r/min, movement speed exists the rotation speed of stirring-head
When between 400~600mm/min, flawless weld seam can be obtained, guarantees the leakproofness of cover board and housing junction.
In conclusion the invention has the following advantages:
1. housing exterior walls thickness is without increasing, so that motor weight be avoided to increase；
2. the stirring-head using routine 4-10 can be normally carried out Friction Stir Welding, the stirring without the smaller shaft shoulder of otherwise designed
Head, welding efficiency is high, long service life；
It, will not be collapsed, deformation 3. certifiable motor casing outer wall is intact.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of casing blank；
Fig. 2 is the casing blank after processing, connection relationship diagram between cover board；
Fig. 3 is the structural schematic diagram of step and through-hole；
Fig. 4 is overall schematic of the invention；
Fig. 5 is the structural schematic diagram of clip in embodiment.
In figure, 1, shell；2, reinforcing rib；3, sink；4, water inlet；5, water outlet；6, step；7, cover board；8, half hoop；9,
Holding tank；10, through-hole.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment:
A kind of tenui-exinous motor casing stirring friction-welding technique, as shown in Figure 4, the specific steps are as follows:
S1: using casting die by casing blank moulding by casting, including shell 1, sink 3 and reinforcing rib 2, for forming sink 3
Sand core be then made of precoated sand.
S2: machining, molding step 6, water inlet 4 and water outlet 5 are carried out to casing blank on numerically controlled lathe.Using
The burr of chemical method removal 6 inner wall of step.
S3: using casting die by 7 moulding by casting of cover board, and the burr on 7 surface of cover board is removed.
S4: using casting die by a pair of of 8 moulding by casting of half hoop, the two is sliceable to form complete clip.
S5: by the assembly of cover board 7 in step 6, by hoop sleeve on shell 1, and the two is fixed by clamping tooling, so
After carry out friction stir weld, depth of weld 4mm.In welding process, control the rotation speed of stirring-head 1600~
Between 2000r/min, movement speed rolls stirring-head tiltedly towards revolution, and stirring-head between 400~600mm/min
Axis and weld seam vertical line between angle be 3 °.
As shown in figure 5, the whole semicircular in shape of half hoop 8, two symmetrically arranged half hoops 8 can be spliced to form complete card
Hoop.
As shown in figure 5, the internal diameter of clip is equal to 240.3mm, slightly larger than the outer diameter of shell 1, thickness is then 15mm.
As shown in figure 5, eight holding tanks 9 are offered on the inner sidewall of clip, with reinforcing rib 2(referring to Fig. 1) it corresponds,
Also it is uniformly distributed around the axle center of clip.
As shown in figure 5, the interface of two half hoops 8 is just by 9 equal part of two of them holding tank, to enhance 8 both ends of half hoop
Structural strength, the wall thickness at 8 both ends of half hoop increases to 15mm.
As shown in figure 5, in order to reinforcing rib 2(referring to Fig. 1) on chamfering everywhere match, the slot bottom and slot of holding tank 9
It is equipped with chamfering at mouthful, and the radius of chamfering is 7.85mm at 9 notch of holding tank, the radius of chamfering is 5.15mm at slot bottom.
When hoop sleeve is on shell 1, the inner sidewall of holding tank 9 is bonded with the two sides of shell 1 neighbouring on reinforcing rib 2,
The bottom surface of holding tank 9 is bonded with reinforcing rib 2 backwards to the side of 1 side of shell, and then there are certain intervals at each chamfering.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (8)
1. a kind of tenui-exinous motor casing stirring friction-welding technique, it is characterised in that: specific step is as follows:
S1: molding casing blank, including shell (1), sink (3) and reinforcing rib (2)；
S2: step (6), water inlet (4) and water outlet (5) are processed on casing blank；
S3: molding cover board (7)；
S4: molding clip, in a ring, the internal diameter of clip is not less than the outer diameter of shell (1) to the clip, opens on the inner sidewall of clip
Equipped with the holding tank (9) for accommodating reinforcing rib (2)；
S5: cover board (7) being assemblied in step (6), by hoop sleeve on shell (1), and is fixed the two by clamping tooling,
Then friction stir weld, depth of weld 4mm are carried out.
2. a kind of tenui-exinous motor casing stirring friction-welding technique according to claim 1, it is characterised in that: the receiving
Chamfering is equipped at the slot bottom and notch of slot (9).
3. a kind of tenui-exinous motor casing stirring friction-welding technique according to claim 2, it is characterised in that: the receiving
The radius of chamfering is 7.85mm at slot (9) notch.
4. a kind of tenui-exinous motor casing stirring friction-welding technique according to claim 2, it is characterised in that: the receiving
The radius of chamfering is 5.15mm at slot (9) slot bottom.
5. a kind of tenui-exinous motor casing stirring friction-welding technique according to claim 1, it is characterised in that: the clip
Internal diameter be 240.3mm.
6. a kind of tenui-exinous motor casing stirring friction-welding technique according to claim 1, it is characterised in that: the clip
It is made of two symmetrically arranged half hoops (8).
7. a kind of tenui-exinous motor casing stirring friction-welding technique according to claim 1, it is characterised in that: welding process
In, stirring-head rolls tiltedly towards revolution, and the angle between the axis of stirring-head and weld seam vertical line is 3 °.
8. a kind of tenui-exinous motor casing stirring friction-welding technique according to claim 1, it is characterised in that: stirring-head
Rotation speed is between 1600~2000r/min, and movement speed is between 400~600mm/min.
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| CN201910214791.0A CN109807568A (en) | 2019-03-20 | 2019-03-20 | Tenui-exinous motor casing stirring friction-welding technique |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110756959A (en) * | 2019-11-27 | 2020-02-07 | 山西汾西重工有限责任公司 | Semicircular hoop welding structure with internal circulation cooling water path and welding forming method |
| CN112296507A (en) * | 2020-10-30 | 2021-02-02 | 辽宁忠旺铝合金精深加工有限公司 | Friction stir welding method for aluminum alloy 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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| 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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Application publication date: 20190528 |