CN206567733U - A kind of weld jig - Google Patents
A kind of weld jig Download PDFInfo
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- CN206567733U CN206567733U CN201720211496.6U CN201720211496U CN206567733U CN 206567733 U CN206567733 U CN 206567733U CN 201720211496 U CN201720211496 U CN 201720211496U CN 206567733 U CN206567733 U CN 206567733U
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Abstract
The utility model discloses a kind of weld jig, including base, mandrel, the first compressing member and the first swelling device；Wherein, base is used to carry to-be-welded pieces；The first end of mandrel is arranged on base and vertical with base；First compressing member is arranged at the second end of mandrel, and the first compressing member can make the weld part of two to-be-welded pieces contact with each other with base engagement；First swelling device is arranged on mandrel, and the first swelling device includes the first support end that several are evenly distributed, and several first support ends can be along the radial stretching, extension of radial direction of mandrel with the weld part of two to-be-welded pieces of swelling；Above-mentioned weld jig utilizes the cooperation of the first compressing member and the first swelling device, the solder side of two to-be-welded pieces can be compressed, and the welding position of two to-be-welded pieces is supported, so as to ensure the axiality of two to-be-welded pieces, the problem of avoiding dislocation, deformation of part etc. from influenceing welding quality occurs, so as to realize raising crudy, shorten the purpose of process-cycle.
Description
Technical field
The utility model is related to part processing technique field, more particularly to a kind of weld jig.
Background technology
When to some parts, such as thin walled welds casing class part progress girth joint processing, because such part carries out ring
The fit clearance of one-piece unit requires high when weld seam is processed, and size and position accuracy demand are tight, cause current weld jig difficult
To be applicable, with part during weldering is yielding, dislocation, axiality of annular element etc. requires to be difficult to ensure that, part crudy and
Process-cycle is unstable.
Therefore, a kind of weld jig how is provided, to ensure the axiality of annular element, it is to avoid part deformation, dislocation etc. are existing
The generation of elephant, improves part crudy, as those skilled in the art's important technological problems urgently to be resolved hurrily.
Utility model content
In view of this, the utility model provides a kind of weld jig, to reach to ensure the axiality of annular element, it is to avoid
The generation of the phenomenons such as part deformation, dislocation, improves the purpose of part crudy.
To achieve the above object, the utility model provides following technical scheme：
A kind of weld jig, including：
Base；
Mandrel, first end is arranged on the base and vertical with the base；
First compressing member at the end of mandrel second is arranged at, first compressing member can make two with the base engagement
The weld part of individual to-be-welded pieces contacts with each other；
The first swelling device on the mandrel is arranged at, first swelling device includes what several were evenly distributed
First support end, several described first support ends can be along the radial synchronous extension of radial direction of the mandrel with two institutes of swelling
State the weld part of to-be-welded pieces.
Preferably, it is provided with the base for one in two to-be-welded pieces to be fixed on into the base
The second compressing member.
Preferably, second compressing member includes several around the circumferentially uniform pressure strip of the mandrel, the pressure strip
It is connected to by press mechanism on the base.
Preferably, the press mechanism includes double threaded screw and nut, and one end of the double threaded screw is fixed on described
On base, the other end coordinates through the pressure strip with the nut.
Preferably, the press mechanism also includes the first elastic component being arranged between the pressure strip and the base.
Preferably, the bar shaped regulating tank for being passed through for the double threaded screw, the compression are provided with the pressure strip
Plate coordinates the compression end for making the pressure strip closer or far from the mandrel by the bar shaped regulating tank and the double threaded screw.
Preferably, second compressing member also includes supporting structure, and it is remote that the supporting structure is arranged at the press mechanism
From the side of the compression end of the pressure strip, the supporting structure include liftably be arranged at the support rod on the base with
And it is arranged at the bar shaped stopper slot on the pressure strip lower surface, the bar shaped stopper slot length direction and the bar shaped regulating tank
Length direction it is consistent and width of the bar shaped stopper slot is identical with the diameter of the support bar.
Preferably, first swelling device includes the first yoke frame and several first support arms, first top
Push piece is in round table-like, and first yoke frame and the mandrel are coaxial and can be moved axially along the mandrel, and several described the
The first end of one support arm is abutted with the side of first yoke frame, and the second end is used as first support end, described first
The first return unit is provided between support arm and the mandrel.
Preferably, the second end of several first support arms is provided with air drain, and the first end opening of the air drain is made
For gas input, the second end opening is as gas output end and is opened in the table that first support arm is contacted with to-be-welded pieces
On face.
Preferably, in addition to the second swelling device for being arranged on the base upper surface, the second swelling device bag
Several are included around the second circumferentially uniform support end of the mandrel, several described second support ends can be along the footpath of the mandrel
To radial synchronous extension so that the to-be-welded pieces being fixed on the base and the mandrel are coaxial.
It can be seen from the above technical proposal that the weld jig that the utility model is provided, including base, mandrel, the first pressure
Tight part and the first swelling device；Wherein, base is used to carry to-be-welded pieces；The first end of mandrel be arranged on base and with bottom
Seat is vertical；First compressing member is arranged at the second end of mandrel, and the first compressing member can make two to-be-welded pieces with base engagement
Weld part contacts with each other；First swelling device is arranged on mandrel, and the first swelling device includes that several are evenly distributed
One support end, several first support ends can be along the radial stretching, extension of radial direction of mandrel with the welding of two to-be-welded pieces of swelling
Portion；
When in use, the first to-be-welded pieces are enclosed on outside mandrel first and be placed on base, then filled using the first swelling
Put and pre-determined bit is carried out to it, it is kept coaxial with mandrel, the second to-be-welded pieces are then contrasted into the first swelling device and the
The position of one to-be-welded pieces is placed into the first to-be-welded pieces, and by the first compressing member that the first to-be-welded pieces and second are to be welded
Fitting is compressed, and then makes the first swelling device swelling, the weld of the first to-be-welded pieces and the second to-be-welded pieces is supported；
From the above, it is seen that using the cooperation of the first compressing member and the first swelling device, can be by the weldering of two to-be-welded pieces
Junction is compressed, and the welding position of two to-be-welded pieces is supported, so as to ensure the axiality of two to-be-welded pieces, it is to avoid
The problem of dislocation, deformation of part etc. influence welding quality occurs, so as to realize raising crudy, shortens the mesh of process-cycle
's.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation for the weld jig that Fig. 1 provides for the utility model embodiment；
The structural representation of second compressing member in the weld jig that Fig. 2 provides for the utility model embodiment.
Embodiment
The utility model provides a kind of weld jig, to reach to ensure the axiality of annular element, it is to avoid part deformation,
The generation of the phenomenons such as dislocation, improves the purpose of part crudy.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Referring to Fig. 1, the structural representation for the weld jig that Fig. 1 provides for the utility model embodiment.
A kind of weld jig that the utility model is provided, including base 1, mandrel 2, the first compressing member 4 and the first swelling
Device 3.
Wherein, base 1 is used to carry to-be-welded pieces, and plays weld jig entirety together with to-be-welded pieces fixed to processing
Effect on lathe；The first end of mandrel 2 is arranged on base 1 and vertical with base 1；First compressing member 4 is arranged at mandrel 2
Second end, the first compressing member 4 can coordinate with base 1 makes the weld part of two to-be-welded pieces contact with each other；First swelling device 3
It is arranged on mandrel 2, the first swelling device 3 includes the first support end that several are evenly distributed, several first support ends
Can be along the radial stretching, extension of radial direction of mandrel 2 with the weld part of two to-be-welded pieces of swelling.
Compared with prior art, the weld jig that the utility model is provided, when in use, first by the first to-be-welded pieces b
It is enclosed on outside mandrel 2 and is placed on base 1, pre-determined bit then is carried out to it using the first swelling device 3, it is kept with mandrel 2
Coaxially, the second to-be-welded pieces a then is placed into first according to the position of the first swelling device 3 and the first to-be-welded pieces b to treat
On weldment b, and first to-be-welded pieces b and the second to-be-welded pieces a is compressed by the first compressing member 4, then make the first swelling
The swelling of device 3, is supported to the first to-be-welded pieces b and the second to-be-welded pieces a weld；From the above, it is seen that
Using the cooperation of the first compressing member 4 and the first swelling device 3, the solder side of two to-be-welded pieces can be compressed, and to two
The welding position of to-be-welded pieces is supported, so as to ensure the axiality of two to-be-welded pieces, it is to avoid dislocation, deformation of part etc.
The problem of influence welding quality, occurs, so as to realize raising crudy, shortens the purpose of process-cycle.
To make to-be-welded pieces more be firmly secured on base 1, so that avoid it from being misplaced in welding process,
In the utility model embodiment, be provided with base 1 for one in two to-be-welded pieces is fixed on base 1 second
Compressing member 5.
In the utility model embodiment, referring to Fig. 2, in the weld jig that Fig. 2 provides for the utility model embodiment
The structural representation of second compressing member 5, the second compressing member 5 includes several around the circumferential uniform pressure strip 51 of mandrel 2, pressure strip
51 are connected on base 1 by press mechanism 52.
The second above-mentioned compressing member 5 is only a kind of preferred embodiment that the utility model embodiment is provided, the second pressure
The structure of tight part 5 is not limited thereto, and the compression to to-be-welded pieces can also be realized using such as piston cylinder structure.
Further optimize above-mentioned technical proposal, in the utility model embodiment, press mechanism 52 includes double threaded screw 521
And nut 522, one end of double threaded screw 521 is fixed on base 1, and the other end coordinates through pressure strip 51 with nut 522.
In addition to the mechanism that above-mentioned double threaded screw 521 and nut 522 coordinate, press mechanism 52 can be also used as under cam
The grade of press mechanism 52 others structure, is not limited herein.
In the utility model embodiment, press mechanism 52 also includes first be arranged between pressure strip 51 and base 1
Elastic component 523, thus unclamp nut 522 after, pressure strip 51 can upspring in the presence of the first elastic component 523, be easy to by
To-be-welded pieces are removed from base 1.
Because the diameter of to-be-welded pieces has difference, in order that the second compressing member 5 can adapt to treating for different-diameter size
Weldment, in the utility model embodiment, is provided with the bar shaped regulating tank for being passed through for double threaded screw 521 on pressure strip 51
51a, pressure strip 51 coordinates the compression end for making pressure strip 51 closer or far from core by bar shaped regulating tank 51a and double threaded screw 521
Axle 2, passes through said structure so that pressure strip 51 can be slided along bar shaped regulating tank 51a so that the compression end of pressure strip 51 with
The distance between mandrel 2 is adjustable, to adapt to the to-be-welded pieces of different diameters.
Due to needing to open up bar shaped regulating tank 51a on pressure strip 51, it is therefore desirable to by its length set it is longer, and be
When the press mechanism 52 that the utility model embodiment is provided coordinates, because the compression end of pressure strip 51 is contacted with to-be-welded pieces, meeting
Cause compression end to upwarp the other end higher than pressure strip 51, pressure strip 51 and the contact area of to-be-welded pieces is diminished, influence is treated
The fixed effect of weldment, to solve the above problems, in the utility model embodiment, the second compressing member 5 also includes supporting knot
Structure 53, supporting structure 53 is arranged at the side of compression end of the press mechanism 52 away from pressure strip 51, and supporting structure 53 includes rising
Drop the support rod being arranged on base 1 and the bar shaped stopper slot 51b being arranged on the lower surface of pressure strip 51, bar shaped stopper slot
51b length directions are consistent with bar shaped regulating tank 51a length direction and diameter phase of width of bar shaped stopper slot 51b and support bar
Together.By above-mentioned supporting structure 53, the two ends of pressure strip 51 can be made to be maintained at the same horizontal plane or keep certain angle
So as to ensure that the lower surface of pressure strip 51 is in close contact with to-be-welded pieces, increase contact area, and by setting bar shaped spacing
Groove 51b, can avoid pressure strip 51 from being rotated around double threaded screw 521, so as to avoid pressure strip 51 from misplacing.
On the one hand the effect of first swelling device 3 is to make two to-be-welded pieces keep coaxial, further aspect is that to two
The welding position of individual to-be-welded pieces is supported, to realize above-mentioned effect, in the utility model embodiment, the first swelling device
3 include the first yoke frame 31 and several first support arms 32, and the first yoke frame 31 is in round table-like, the first yoke frame 31 and core
Axle 2 is coaxial and can be moved axially along the mandrel 2, the first end of several the first support arms 32 and the side of the first yoke frame 31
Abut, the second end is provided with the first return unit 33 as the first support end between the first support arm 32 and mandrel 2.Refer to figure
1, as the first yoke frame 31 is moved down on mandrel 2, its side can pushing tow several first support arms 32 it is synchronous outwards
Stretch out, the second end of the first support arm 32 is abutted with the welding position of two to-be-welded pieces, when the first yoke frame 31 is on mandrel 2
When moving up, the first support arm 32 is withdrawn in the presence of the first return unit 33, is easy to remove weldment.First support arm 32
The inside of weldment is arranged on, therefore accommodation can be carried out according to the internal structure of weldment, from figure 1 it appears that being
Evade the internal structure of weldment, the first support arm 32 employs the structure of S-shaped.
Further optimize above-mentioned technical proposal, in the utility model embodiment, the second of several the first support arms 32
End is provided with air drain 32a, air drain 32a the first end opening as gas input, the second end opening as gas output end and
It is opened on the surface that the first support arm 32 is contacted with to-be-welded pieces.Due to the first support arm 32 in welding process it is highly stable
Ground is maintained at the welding position of two to-be-welded pieces, opens up air drain 32a on the first support arm 32, ensure that to welding position
Stable inert gas is provided to improve welding quality, while help to simplify structure, without set extra structure with to
Welding position provides inert gas.
To be further easy to the fixation of to-be-welded pieces, it is ensured that the axiality of two to-be-welded pieces, implement in the utility model
In example, weld jig also includes the second swelling device 6 being arranged on the upper surface of base 1, and the second swelling device 6 includes several
Around circumferential the second uniform support end of mandrel 2, several second support ends can be along the radial stretching, extension of radial direction of mandrel 2 so that solid
The to-be-welded pieces and mandrel 2 being scheduled on base 1 are coaxial.So, can when one of to-be-welded pieces are fixed on base 1
First passing through the second swelling device 6 makes the weldment keep coaxial with mandrel 2, is then fixed in bottom using the second compressing member 5
On seat 1, the alignment centering operation of two to-be-welded pieces can be made simpler.
In the utility model embodiment, the second swelling device 6 and the first swelling device 3 employ identical structure, i.e.,
Second swelling device 6 includes the second yoke frame and several second support arms, and the second yoke frame is in round table-like, the second yoke frame
Coaxial and be slidably disposed on mandrel 2 with mandrel 2, the second support arm is slidably disposed on base 1 and the second support
The first end of arm is abutted with the side of the second yoke frame, and the second end is set as the second support end between the second support arm and base 1
It is equipped with the second return unit 7.
Preferably, the first yoke frame 31 and the second yoke frame coordinate with the screw thread of mandrel 2.
First swelling device 3 and the second swelling device 6 are not limited to the structure of the utility model embodiment offer, remove
Outside above-mentioned structure, expansion mechanism can also be using other structures, such as expansion mechanism can make several around mandrel 2 weeks
To equally distributed piston cylinder, by cam mechanism of Motor Control etc., as long as can extend radially out or retract along mandrel 2
, when using piston cylinder as expansion mechanism, to ensure that each piston cylinder can synchronously stretch out, can make on hydraulic circuit
With flow divider-combiner to ensure that the flow for flowing into piston cylinder is identical, so that the overhang of piston cylinder is identical.
Further optimize above-mentioned technical proposal, in the utility model embodiment, the second return unit 7 include fixed block and
Second elastic component, fixed block is arranged on base 1 and is sleeved in the bar shaped chute of the second support arm, and the length of bar shaped chute is big
In the length of fixed block, width is identical with the width of fixed block, and the second elastic component is arranged on the side wall of fixed block and bar shaped chute
Between.
To be easy to operate the second swelling device 6 when to-be-welded pieces are fixed on base 1, while being easy to consolidate base 1
Determine onto the workbench of machining tool, in the utility model embodiment, base 1 includes spaced bottom plate 11 and carrying
Plate 12, the first end of mandrel 2 is arranged on bottom plate 11, and the second end passes through on loading plate 12 and extended to distal end.Further, hold
The through hole for being available for the yoke frame of mandrel 2 and second to pass through is provided with support plate 12, the operating side of the second yoke frame is located at loading plate
Between 12 and bottom plate 11.So, formd between bottom plate 11 and loading plate 12 empty available for the operation of the second swelling device 6 of control
Between, it is easy to operate the second swelling device 6, the bottom surface of base 1 is protruded from by avoiding the end of mandrel 2, is easy to bottom
Seat 1 is fixed on the workbench of machining tool.
In the utility model embodiment, as shown in figure 1, the first compressing member 4 includes compressing cover lid 43 and clamp nut
41, compress cover lid 43 and be sleeved on mandrel 2, clamp nut 41 coordinates with the screw thread of mandrel 2 pushes compression cover lid 43.
Further optimize above-mentioned technical proposal, in the utility model embodiment, the lower end for compressing cover lid 43 is provided with use
In the step surface with the cooperation of the upper surface of one of to-be-welded pieces.The lower end for compressing cover lid 43 can also be according to to-be-welded pieces
Upper surface carries out other accommodations, and its purpose is all better able to the upper surface cooperation with to-be-welded pieces, it is ensured that energy
It is enough to be pressed together two to-be-welded pieces.
To avoid the upper table facial disfigurement for compressing cover lid 43, so as to cause its lower end good with the upper surfaces of to-be-welded pieces
Coordinate, in the utility model embodiment, be provided between clamp nut 41 and compression cover lid 43 for increasing clamp nut 41
With the end cap 42 for the contact area for compressing cover lid 43.
As shown in fig. 1, some handles 8 are also evenly equipped with the circumference of base 1, in order to the movement of weld jig.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (10)
1. a kind of weld jig, it is characterised in that including：
Base；
Mandrel, first end is arranged on the base and vertical with the base；
First compressing member at the end of mandrel second is arranged at, first compressing member can make two to treat with the base engagement
The weld part of weldment contacts with each other；
The first swelling device on the mandrel is arranged at, first swelling device includes first that several are evenly distributed
Support end, several described first support ends can be treated along the radial direction radial synchronous extension of the mandrel described in swelling two
The weld part of weldment.
2. weld jig according to claim 1, it is characterised in that be provided with the base for will be treated described in two
One in weldment the second compressing member for being fixed on the base.
3. weld jig according to claim 2, it is characterised in that second compressing member includes several around the core
The circumferentially uniform pressure strip of axle, the pressure strip is connected on the base by press mechanism.
4. weld jig according to claim 3, it is characterised in that the press mechanism includes double threaded screw and spiral shell
Mother, one end of the double threaded screw is fixed on the base, and the other end coordinates through the pressure strip with the nut.
5. weld jig according to claim 4, it is characterised in that the press mechanism also includes being arranged at the compression
The first elastic component between plate and the base.
6. weld jig according to claim 4, it is characterised in that be provided with the pressure strip for supplying the double end
The bar shaped regulating tank that screw rod is passed through, the pressure strip is coordinated by the bar shaped regulating tank and the double threaded screw makes the compression
The compression end of plate is closer or far from the mandrel.
7. weld jig according to claim 6, it is characterised in that second compressing member also includes supporting structure, institute
The side that supporting structure is arranged at compression end of the press mechanism away from the pressure strip is stated, the supporting structure includes rising
Drop the support rod being arranged on the base and the bar shaped stopper slot being arranged on the pressure strip lower surface, the bar shaped
Stopper slot length direction is consistent with the length direction of the bar shaped regulating tank and width of the bar shaped stopper slot and the support
The diameter of bar is identical.
8. the weld jig according to claim any one of 1-7, it is characterised in that first swelling device includes first
Yoke frame and several first support arms, first yoke frame are in round table-like, and first yoke frame and the mandrel are same
Axle and it can be moved axially along the mandrel, the first end of several first support arms and the side of first yoke frame are supported
Connect, the second end is provided with the first return unit as first support end between first support arm and the mandrel.
9. weld jig according to claim 8, it is characterised in that the second end of several first support arms is set
There is air drain, the first end opening of the air drain is as gas input, and the second end opening is as gas output end and is opened in institute
State on the surface that the first support arm is contacted with to-be-welded pieces.
10. the weld jig according to claim any one of 1-7, it is characterised in that also including being arranged on the base
The second swelling device on surface, second swelling device includes several around the second circumferentially uniform support of the mandrel
End, several described second support ends can be along the radial synchronous extension of radial direction of the mandrel so as to be fixed on the base
To-be-welded pieces and the mandrel it is coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211496.6U CN206567733U (en) | 2017-03-06 | 2017-03-06 | A kind of weld jig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211496.6U CN206567733U (en) | 2017-03-06 | 2017-03-06 | A kind of weld jig |
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| CN206567733U true CN206567733U (en) | 2017-10-20 |
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| CN201720211496.6U Active CN206567733U (en) | 2017-03-06 | 2017-03-06 | A kind of weld jig |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225275A (en) * | 2018-01-09 | 2018-06-29 | 无锡富瑞德测控仪器股份有限公司 | A kind of image instrument workpiece swelling fixed mechanism |
| CN108890207A (en) * | 2018-09-10 | 2018-11-27 | 中国航发航空科技股份有限公司 | Device for aeroengine combustor buring room casing assembly positioning welding |
| CN112676720A (en) * | 2020-12-25 | 2021-04-20 | 浙江安胜科技股份有限公司 | Clamp for laser seamless welding |
| CN114273856A (en) * | 2021-12-14 | 2022-04-05 | 中航贵州飞机有限责任公司 | Part processing method for solving friction force attenuation problem of front cabin accelerator control console |
| CN115055800A (en) * | 2022-06-29 | 2022-09-16 | 中国航发动力股份有限公司 | Electron beam welding deformation control equipment and method for short ring parts |
-
2017
- 2017-03-06 CN CN201720211496.6U patent/CN206567733U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225275A (en) * | 2018-01-09 | 2018-06-29 | 无锡富瑞德测控仪器股份有限公司 | A kind of image instrument workpiece swelling fixed mechanism |
| CN108225275B (en) * | 2018-01-09 | 2024-03-29 | 无锡富瑞德测控仪器股份有限公司 | Image appearance work piece expands and fastens mechanism |
| CN108890207A (en) * | 2018-09-10 | 2018-11-27 | 中国航发航空科技股份有限公司 | Device for aeroengine combustor buring room casing assembly positioning welding |
| CN112676720A (en) * | 2020-12-25 | 2021-04-20 | 浙江安胜科技股份有限公司 | Clamp for laser seamless welding |
| CN114273856A (en) * | 2021-12-14 | 2022-04-05 | 中航贵州飞机有限责任公司 | Part processing method for solving friction force attenuation problem of front cabin accelerator control console |
| CN115055800A (en) * | 2022-06-29 | 2022-09-16 | 中国航发动力股份有限公司 | Electron beam welding deformation control equipment and method for short ring parts |
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Address after: 412000 No. 2 Airway Road, Lusong District, Zhuzhou City, Hunan Province Patentee after: Hunan Nanfang General Aviation Engine Co., Ltd. Address before: 412000 No. 2 Airway Road, Lusong District, Zhuzhou City, Hunan Province Patentee before: AVIC HUNAN GENERAL AVIATION ENGINE CO., LTD. |