CN209140217U - Welding pre-determined bit expansion tooling - Google Patents
Welding pre-determined bit expansion tooling Download PDFInfo
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- CN209140217U CN209140217U CN201822060300.5U CN201822060300U CN209140217U CN 209140217 U CN209140217 U CN 209140217U CN 201822060300 U CN201822060300 U CN 201822060300U CN 209140217 U CN209140217 U CN 209140217U
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Abstract
The utility model discloses a kind of welding to be pre-positioned expansion tooling, belongs to New-energy electric vehicle production technical field, and solving the problems, such as traditional header, process is tedious, manufacturing cost is high, welding base metal is easily-deformable with elbow pipe welding.It mainly include power source mechanism, tubular workpiece A positioning mechanism, mandril expansion mechanism, tubular workpiece B hold-down mechanism and the base support mechanism playing supporting role.The utility model design is very ingenious, effectively reduces traditional bend pipe and header welding sequence step, and without high welding technique sophistication is trained, cost of goods manufactured is greatly lowered；Easy to operate, pre-determined bit fastening is stablized, and the product of the high welding quality, neat and artistic, the high qualification rate of appearance that go out for subsequent production lays good basis；Manufacture is easy, and manufacturing cost is low, and practicability is very strong, and economical, societal benefits are significant, has very important significance in liquid cooling system manufacturing field and New-energy electric vehicle technical field.
Description
Technical field
The utility model belongs to New-energy electric vehicle production technical field, specifically, more particularly to one kind can subtract
Few production process is greatly lowered that enterprise's manufacturing cost, to improve product quality, smart structural design, pre-determined bit fastening, operation fast
Prompt convenient welding pre-determined bit expansion tooling.
Background technique
For the power demands for meeting high-power electric appliance, can generally be formed using multiple batteries serial or parallel connection battery pack come into
Row power supply.Multiple batteries power supply necessarily leads to larger heat, if not taking effective cooling system to be cooled down, not only seriously
The service life of battery is influenced, and there is very big security risk.Harmonica-shaped tube-afflux tubular type cooling system is light-weight with its,
Heat dissipation performance well be used widely in New-energy electric vehicle industry by advantage.Harmonica-shaped tube-afflux tubular type cooling system is
The coolant liquid circulation loop being made of harmonica-shaped tube, header, bend pipe, hose assembly.As shown in Figure of description Figure 10, bend pipe is
Welding procedure is used to be fixedly connected after being socketed in header.There are two types of welding procedure is general, one kind be Welding technique, one
Kind is flame welding welding procedure.Welding be product is integral braze-welded into soldering oven, the Product jointing quality produced is high, produces
Product will not deform, product appearance is completely beautiful, but the welding of bend pipe and header can not directly adopt soldering processes, because
After bend pipe is inserted in header, bend pipe can opposite header generate deflection gap, product is not after which will lead to welding
Yield is very high.So the welding for header and bend pipe, enterprise uses always flame welding welding procedure, but it is known that
Flame welding is completed in an oxidation environment, and soldering, which is followed by head surface, has pincers agent residue and heat dirt, later period to need to polish,
Not only increase process, increases enterprise's production cost, and heating temperature is difficult to grasp when manual operations, the welding to operating personnel
Technical level requires very high.In addition, gas brazing is a Local Heating Process, stress or hair may be caused in welding base metal
Raw deformation.The Welding Problems of header and bend pipe become the hang-up of enterprise's urgent need to resolve.
Utility model content
The purpose of this utility model be in view of the deficienciess of the prior art, provide one kind can reduce production process,
Enterprise's manufacturing cost is greatly lowered, improves product quality, smart structural design, pre-determined bit fastening, weldering swift and convenient to operate
Connect pre-determined bit expansion tooling.
The utility model is achieved through the following technical solutions:
A kind of welding is pre-positioned expansion tooling, including power source mechanism, tubular workpiece A positioning mechanism, mandril expansion mechanism,
Tubular workpiece B hold-down mechanism and the base support mechanism playing supporting role；
The mandril expansion mechanism includes plug, the plug locating piece of the fixed plug position, setting in the plug
Interior mandril；The mandril runs through the plug, and head end is fixedly connected with the power output end of the power source mechanism, end
End is equipped with the riveter along the upward tilt slide in its side, and the riveter exposes the riveter hole being arranged on the plug, by institute
It states riveter hole and limits the movement of the riveter in the horizontal direction；
The tubular workpiece A positioning mechanism is used for supporting tubular workpiece A；
The tubular workpiece B hold-down mechanism is used to tubular workpiece B being pressed on the tubular workpiece A；
Preferably, the tubular workpiece A positioning mechanism includes workpiece A supporting block 6,6 fixed bearing of workpiece A supporting block
In the base support mechanism；
The tubular workpiece B hold-down mechanism includes active grab 7, and the end of the active grab 7 is equipped with company fixed thereto
The briquetting 8 connect, the active grab 7 are fixedly supported upon in the base support mechanism through clamp supporting element.
Preferably, 3 end of mandril is tapered ramp, and 3 side of the mandril is equipped with and tilts with the tapered ramp 9
The consistent oblique groove 10 of angle, the region between 10 top edge of oblique groove and the tapered ramp 9 constitute the small skewback of mandril
11；The riveter 4 is equipped with the sliding oblique groove 12 that matches with the small skewback 11 of the mandril, the small skewback 11 of mandril along
The sliding oblique groove 12 slides；Region between sliding 12 lower edge of oblique groove and 4 bottom edge of the riveter is constituted
The small skewback 13 of riveter, the small skewback 13 of riveter match with the oblique groove 10, slide along the oblique groove 10.
Preferably, the plug 1 is equipped with workpiece A locating piece 14, and the workpiece A locating piece 14 is to be socketed in the plug
Rectangular block on 1, the rectangular block top is opposite opened, and split part is adopted and is bolted connection.
Preferably, the cross recess of the T-shaped shape of the plug 1, T connector portion and plug locating piece 2 is interference fitted.
Preferably, the power source mechanism includes cylinder 15.
Preferably, the piston rod of the cylinder 15 is fixedly connected through jointing 16 with the head end of the mandril 3.
Preferably, the clamp supporting element includes fixed block 17, slide bar 18, the pedestal being fixed as one with the slide bar 18
19,7 ontology of active grab is fixed on the fixed block 17, and the fixed block 17 connects through bolt and the slide bar 18 are fixed
It connects, the pedestal 19 is fixedly supported upon in the base support mechanism.
Preferably, the base support mechanism includes bottom plate 20 and side plate 21, the side plate 21 and 20 bolt of bottom plate
It is fixedly connected.
Preferably, the tubular workpiece A is header, and the tubular workpiece B is bend pipe.
Compared with prior art, the utility model has the beneficial effects that
1. the utility model design is very ingenious, the movement in horizontal direction is turned by succinct cleverly structure design
The movement being changed on vertical direction realizes that the expanded joint of bend pipe and header is pre-positioned to the extruding of bend pipe using riveter；This is practical
The novel traditional bend pipe of effective reduction and header welding sequence step, without high welding technique sophistication is trained, significantly
Reduce cost of goods manufactured；The utility model is easy to operate, and pre-determined bit fastening is stablized, the high welding matter gone out for subsequent production
It measures, the product of neat and artistic, the high qualification rate of appearance lays good basis；
2. the utility model manufacture is easy, manufacturing cost is low, and practicability is very strong, and economical, societal benefits are significant, in liquid cooling system
System manufacturing field and New-energy electric vehicle technical field have very important significance.
Detailed description of the invention
Fig. 1 is the utility model structure diagram one；
Fig. 2 is the utility model structure diagram two；
Fig. 3 is the utility model overlooking structure diagram；
Fig. 4 is the utility model mandril, plug, riveter fit structure schematic diagram；
Fig. 5 is the utility model mandril, riveter fit structure schematic diagram one；
Fig. 6 is the utility model mandril, riveter fit structure schematic diagram two；
Fig. 7 is the utility model push rod structure schematic diagram；
Fig. 8 is the utility model riveter structural schematic diagram；
Fig. 9 is the utility model mandrel structure schematic diagram；
Figure 10 is header and elbow fittings connection schematic diagram.
In figure: 1. plugs；2. plug locating piece；3. mandril；4. riveter；5. riveter hole；6. workpiece A supporting block；7. quickly
Clamp；8. briquetting；9. tapered ramp；10. oblique groove；11. the small skewback of mandril；12. sliding oblique groove；13. the small skewback of riveter；
14. workpiece A locating piece；15. cylinder；16. jointing；17. fixed block；18. slide bar；19. pedestal；20. bottom plate；21. side plate；
22. tubular workpiece A；23. tubular workpiece B.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
A kind of welding is pre-positioned expansion tooling, including power source mechanism, tubular workpiece A positioning mechanism, mandril expansion mechanism,
Tubular workpiece B hold-down mechanism and the base support mechanism playing supporting role；
The mandril expansion mechanism includes plug 1, the plug locating piece 2 of the fixed plug position, setting in the core
Mandril 3 in stick 1；The mandril 3 runs through the plug 1, the fixed company of the power output end of head end and the power source mechanism
It connects, end is equipped with the riveter 4 along the upward tilt slide in its side, and the riveter 4 exposes the riveting being arranged on the plug 1
Head bore 5 limits the movement of the riveter 4 in the horizontal direction by the riveter hole 5；
The tubular workpiece A positioning mechanism is used for supporting tubular workpiece A22；
The tubular workpiece B hold-down mechanism is used to tubular workpiece B23 being pressed on the tubular workpiece A22；
Preferably, the tubular workpiece A positioning mechanism includes workpiece A supporting block 6,6 fixed bearing of workpiece A supporting block
In the base support mechanism；
The tubular workpiece B hold-down mechanism includes active grab 7, and the end of the active grab 7 is equipped with company fixed thereto
The briquetting 8 connect, the active grab 7 are fixedly supported upon in the base support mechanism through clamp supporting element.
Preferably, 3 end of mandril is tapered ramp, and 3 side of the mandril is equipped with and tilts with the tapered ramp 9
The consistent oblique groove 10 of angle, the region between 10 top edge of oblique groove and the tapered ramp 9 constitute the small skewback of mandril
11；The riveter 4 is equipped with the sliding oblique groove 12 that matches with the small skewback 11 of the mandril, the small skewback 11 of mandril along
The sliding oblique groove 12 slides；Region between sliding 12 lower edge of oblique groove and 4 bottom edge of the riveter is constituted
The small skewback 13 of riveter, the small skewback 13 of riveter match with the oblique groove 10, slide along the oblique groove 10.
Preferably, the plug 1 is equipped with workpiece A locating piece 14, and the workpiece A locating piece 14 is to be socketed in the plug
Rectangular block on 1, the rectangular block top is opposite opened, and split part is adopted and is bolted connection.
Preferably, the cross recess of the T-shaped shape of the plug 1, T connector portion and plug locating piece 2 is interference fitted.
Preferably, the power source mechanism includes cylinder 15.
Preferably, the piston rod of the cylinder 15 is fixedly connected through jointing 16 with the head end of the mandril 3.
Preferably, the clamp supporting element includes fixed block 17, slide bar 18, the pedestal being fixed as one with the slide bar 18
19,7 ontology of active grab is fixed on the fixed block 17, and the fixed block 17 connects through bolt and the slide bar 18 are fixed
It connects, the pedestal 19 is fixedly supported upon in the base support mechanism.
Preferably, the base support mechanism includes bottom plate 20 and side plate 21, the side plate 21 and 20 bolt of bottom plate
It is fixedly connected.
Preferably, the tubular workpiece A is header, and the tubular workpiece B is bend pipe.
Embodiment 1:
The present embodiment includes power source mechanism, tubular workpiece A positioning mechanism, mandril expansion mechanism, tubular workpiece B compacting machine
Structure and the base support mechanism playing supporting role；Mandril expansion mechanism includes the plug positioning of plug 1, stationary core rod position
Block 2, the mandril 3 being arranged in plug 1；Mandril 3 runs through plug 1, the fixed company of the power output end of head end and power source mechanism
It connects, end is equipped with the riveter 4 along the upward tilt slide in its side, and the riveter 4 exposes the riveter hole being arranged on plug 1
5, the movement of riveter 4 in the horizontal direction is limited by riveter hole 5；Tubular workpiece A positioning mechanism is used for supporting tubular workpiece A22；
Tubular workpiece B hold-down mechanism is used to tubular workpiece B23 being pressed on tubular workpiece A22.
Tubular workpiece B hold-down mechanism is unclamped first, is allowed in non-impaction state；Tubular workpiece A22 is placed on outside plug 1
Side, tubular workpiece A22 is supported by tubular workpiece A positioning mechanism, and the peace that tubular workpiece A22 is connect with tubular workpiece B23
The center for filling the center alignment riveter 4 in hole, by (such as explanation in the mounting hole of tubular workpiece B23 insertion tubular workpiece A22 after alignment
Shown in book attached drawing Figure 10).Tightly tubular workpiece B23 is pressed on tubular workpiece A22 using workpiece B hold-down mechanism.At this point, opening
The output end driving mandril 3 of dynamic power source mechanism, power source mechanism does horizontal rectilinear motion, and the terminal position of mandril is equipped with along top
Bar side faces upward the riveter 4 of tilt slide, and the linear motion of mandril 3 is converted to and is tilted upward to move by riveter 4.Riveter 4 is exposed
Riveter hole 5 on plug 1 is set, the movement of riveter 4 in the horizontal direction is limited by riveter hole 5, so the fortune tilted upward
Turn is changed to be moved straight up.Riveter 4 is designed to head in size design to body gradually wide structure type, in order to bend pipe
Squeezing action is played, makes bend pipe together with the firm expanded joint of header, plays the role of pre-determined bit.
The present embodiment design is very ingenious, is converted to the movement in horizontal direction by succinct cleverly structure design
Movement on vertical direction realizes that the expanded joint of bend pipe and header is pre-positioned to the extruding of bend pipe using riveter；The present embodiment has
Effect reduces traditional bend pipe and header welding sequence step, and without high welding technique sophistication is trained, production is greatly lowered
Product manufacturing cost；The present embodiment is easy to operate, pre-determined bit fastening stabilization, the high welding quality gone out for subsequent production, appearance
The product of neat and artistic, high qualification rate lays good basis；The present embodiment is easy to operate, and pre-determined bit fastening is stablized, after being
The product for continuing the high welding quality, neat and artistic, the high qualification rate of appearance produced lays good basis.
Embodiment 2:
The present embodiment includes power source mechanism, tubular workpiece A positioning mechanism, mandril expansion mechanism, tubular workpiece B compacting machine
Structure and the base support mechanism playing supporting role；Mandril expansion mechanism includes the plug positioning of plug 1, stationary core rod position
Block 2, the mandril 3 being arranged in plug 1；Mandril 3 runs through plug 1, the fixed company of the power output end of head end and power source mechanism
It connects, end is equipped with the riveter 4 along the upward tilt slide in its side, and the riveter 4 exposes the riveter hole being arranged on plug 1
5, the movement of riveter 4 in the horizontal direction is limited by riveter hole 5；Tubular workpiece A positioning mechanism is used for supporting tubular workpiece A22；
Tubular workpiece B hold-down mechanism is used to tubular workpiece B23 being pressed on tubular workpiece A22.
The present embodiment tubular workpiece A is header, and tubular workpiece B is bend pipe.
Tubular workpiece A positioning mechanism includes workpiece A supporting block 6, and workpiece A supporting block 6 is fixedly supported upon base support mechanism
On；Tubular workpiece B hold-down mechanism includes active grab 7, and the end of active grab 7 is equipped with the briquetting 8 of connection fixed thereto, quickly
Clamp 7 is fixedly supported upon in base support mechanism through clamp supporting element.3 end of mandril is tapered ramp, and 3 side of mandril is equipped with
With the consistent oblique groove 10 of 9 tilt angle of tapered ramp, the region between 10 top edge of oblique groove and tapered ramp 9 constitutes mandril
Small skewback 11；Riveter 4 is equipped with the sliding oblique groove 12 to match with the small skewback 11 of mandril, and the small skewback 11 of mandril is oblique along sliding
Groove 12 slides；The region slided between 12 lower edge of oblique groove and 4 bottom edge of riveter constitutes the small skewback 13 of riveter, and riveter is small
Skewback 13 matches with oblique groove 10, slides along oblique groove 10.Wherein, the U-shaped shape in the section of briquetting 8 is designed to U-shaped shape
It is to match bend pipe, the end of briquetting 8 is pressed on the convex ridge of bend pipe.
Plug 1 is equipped with workpiece A locating piece 14, and workpiece A locating piece 14 is the rectangular block being socketed on plug 1, rectangular block
Top is opposite opened, and split part is adopted and is bolted connection.The T-shaped shape of plug 1, T connector portion and plug locating piece 2
Cross recess interference fit.Power source mechanism includes cylinder 15, and cylinder 15 is fixed on side plate 21.The piston rod of cylinder 15 is through connecting
Connector 16 is fixedly connected with the head end of mandril 3.Clamp supporting element includes that fixed block 17, slide bar 18 and slide bar 18 are fixed as one
Pedestal 19,7 ontology of active grab are fixed on fixed block 17, and fixed block 17 is fixedly connected through bolt with slide bar 18, and pedestal 19 is solid
Surely it is supported in base support mechanism.Base support mechanism includes bottom plate 20 and side plate 21, and side plate 21 is fixed with 20 bolt of bottom plate
Connection.
The handle for pressing active grab 7 first lifts briquetting 8；The center of header mounting hole needs to be aligned in riveter 4
The heart, so needing first to have predefined position of the workpiece A locating piece 14 on plug 1 according to the length of header.Workpiece A positioning
Block 14 is the rectangular block being socketed on plug 1, and rectangular block top is opposite opened, and split part is positioned workpiece A using bolt
Block is fastenedly connected with plug 1.Then by afflux pipe sleeve on plug 1, header is supported by workpiece A supporting block 6, and header arrives at
When at workpiece A locating piece 14, bend pipe is put into header after alignment by the center of the center alignment riveter 4 of header mounting hole
In mounting hole, lift 7 handle of active grab after setting position, briquetting 8 moves downward and the U-shaped mouth of briquetting 8 is pressed on bend pipe
Convex ridge on, being pressed on header steadily by bend pipe of briquetting 8.
After compressing two workpiece, start cylinder 15, the piston rod driving mandril 3 of cylinder 15 does horizontal rectilinear motion, pushing up
The end of bar is equipped with riveter.3 end of mandril is tapered ramp, and 3 side of mandril is equipped with consistent with 9 tilt angle of tapered ramp
Oblique groove 10, the region between 10 top edge of oblique groove and tapered ramp 9 constitute the small skewback 11 of mandril；Riveter 4 is equipped with and top
The sliding oblique groove 12 that the small skewback 11 of bar matches, the small skewback 11 of mandril are slided along sliding oblique groove 12；Slide oblique groove 12
Region between 4 bottom edge of lower edge and riveter constitutes the small skewback 13 of riveter, and the small skewback 13 of riveter matches with oblique groove 10,
It is slided along oblique groove 10.The linear motion of mandril 3 is converted to and is tilted upward to move by riveter 4, but riveter 4 exposes setting and exists
Riveter hole 5 on plug 1, riveter hole 5 limit the movement of riveter 4 in the horizontal direction, so the movement conversion tilted upward
To move straight up.Riveter 4 is designed to that gradually wide structure type, riveter 4 gradually squeeze head upwards to body in size design
Bend pipe, bend pipe together with the firm expanded joint of header, eliminate by the deflection gap between bend pipe and header, also just plays predetermined
Position effect.Finally, the workpiece after pre-determined bit enters soldering oven and is brazed.
The present embodiment design is very ingenious, is converted to the movement in horizontal direction by succinct cleverly structure design
Movement on vertical direction realizes that the expanded joint of bend pipe and header is pre-positioned to the extruding of bend pipe using riveter；The present embodiment has
Effect reduces traditional bend pipe and header welding sequence step, and without high welding technique sophistication is trained, production is greatly lowered
Product manufacturing cost；The present embodiment is easy to operate, pre-determined bit fastening stabilization, the high welding quality gone out for subsequent production, appearance
The product of neat and artistic, high qualification rate lays good basis；The present embodiment is easy to operate, and pre-determined bit fastening is stablized, after being
The product for continuing the high welding quality, neat and artistic, the high qualification rate of appearance produced lays good basis.The present embodiment manufacture is held
Easily, manufacturing cost is low, and practicability is very strong, and economical, societal benefits are significant, in liquid cooling system manufacturing field and New energy electric vapour
Vehicle technical field has very important significance.
In conclusion the preferred embodiment of only the utility model, is not used to limit the utility model implementation
Range, all equivalent changes according to carried out by shape described in the utility model claims range, construction, feature and spirit with repair
Decorations, should be included in the scope of the claims of the utility model.
Claims (10)
1. a kind of welding is pre-positioned expansion tooling, it is characterised in that: including power source mechanism, tubular workpiece A positioning mechanism, mandril
Expansion mechanism, tubular workpiece B hold-down mechanism and the base support mechanism playing supporting role；
The mandril expansion mechanism includes plug, the plug locating piece for fixing the plug position, is arranged in the plug
Mandril；The mandril runs through the plug, and head end is fixedly connected with the power output end of the power source mechanism, and end is set
There is the riveter along the upward tilt slide in its side, and the riveter exposes the riveter hole being arranged on the plug, by the riveting
Head bore limits the movement of the riveter in the horizontal direction；
The tubular workpiece A positioning mechanism is used for supporting tubular workpiece A；
The tubular workpiece B hold-down mechanism is used to tubular workpiece B being pressed on the tubular workpiece A.
2. welding according to claim 1 is pre-positioned expansion tooling, it is characterised in that: the tubular workpiece A positioning mechanism
Including workpiece A supporting block, the workpiece A supporting block is fixedly supported upon in the base support mechanism；
The tubular workpiece B hold-down mechanism includes active grab, and the end of the active grab is equipped with the pressure of connection fixed thereto
Block, the active grab are fixedly supported upon in the base support mechanism through clamp supporting element.
3. welding according to claim 1 is pre-positioned expansion tooling, it is characterised in that: the jack end is that wedge shape is oblique
Face, and the mandril side is equipped with and the consistent oblique groove of tapered ramp tilt angle, the oblique groove top edge and institute
The region stated between tapered ramp constitutes the small skewback of mandril；The riveter is equipped with the sliding to match with the small skewback of the mandril
Oblique groove, the small skewback of mandril are slided along the sliding oblique groove；The sliding oblique groove lower edge and the riveter bottom
Region between end margin constitutes the small skewback of riveter, and the small skewback of riveter matches with the oblique groove, along described oblique
Groove sliding.
4. welding according to claim 1 is pre-positioned expansion tooling, it is characterised in that: the plug is fixed equipped with workpiece A
Position block, the workpiece A locating piece is the rectangular block being socketed on the plug, and the rectangular block top is opposite opened, and split
Part, which is adopted, to be bolted connection.
5. welding according to claim 1 is pre-positioned expansion tooling, it is characterised in that: the T-shaped shape of plug, T-type
The cross recess of head and plug locating piece is interference fitted.
6. welding according to claim 1 is pre-positioned expansion tooling, it is characterised in that: the power source mechanism includes gas
Cylinder.
7. welding according to claim 6 is pre-positioned expansion tooling, it is characterised in that: the piston rod of the cylinder is through connecting
Connector is fixedly connected with the head end of the mandril.
8. welding according to claim 2 is pre-positioned expansion tooling, it is characterised in that: the clamp supporting element includes fixing
Block, slide bar, the pedestal being fixed as one with the slide bar, the active grab ontology are fixed on the fixed block, the fixation
Block is fixedly connected through bolt with the slide bar, and the pedestal is fixedly supported upon in the base support mechanism.
9. welding according to claim 1 is pre-positioned expansion tooling, it is characterised in that: the base support mechanism includes bottom
Plate and side plate, the side plate are fixedly connected with the bed bolt.
10. welding according to claim 1 is pre-positioned expansion tooling, it is characterised in that: the tubular workpiece A is afflux
Pipe, the tubular workpiece B are bend pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822060300.5U CN209140217U (en) | 2018-12-07 | 2018-12-07 | Welding pre-determined bit expansion tooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822060300.5U CN209140217U (en) | 2018-12-07 | 2018-12-07 | Welding pre-determined bit expansion tooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209140217U true CN209140217U (en) | 2019-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822060300.5U Active CN209140217U (en) | 2018-12-07 | 2018-12-07 | Welding pre-determined bit expansion tooling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332991A (en) * | 2018-12-07 | 2019-02-15 | 扬州嘉和新能源科技有限公司 | Welding pre-determined bit expansion tooling and the small assembly welding method of header using it |
-
2018
- 2018-12-07 CN CN201822060300.5U patent/CN209140217U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332991A (en) * | 2018-12-07 | 2019-02-15 | 扬州嘉和新能源科技有限公司 | Welding pre-determined bit expansion tooling and the small assembly welding method of header using it |
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