Aero-engine is the heart of aircraft, is the thermal machine of a kind of high complexity and precision,
Predominantly airborne vehicle provides the electromotor of flight required drive.For to a certain extent, aviation
The height of engine technology directly affects performance, reliability and the economy of aircraft, is one
The important embodiment of national science and technology, industry and military capability of the country.Presently, with the development of science and technology,
Countries in the world are all in the research and development for gradually strengthening aero-engine.
Casing is one of part of aero-engine, and casing is generally various parts and is welded,
Accompanying drawing 1 provides a kind of existing casing.As shown in Figure 1, the casing 5 includes upper set
501 and trap 502, when specifically making, typically first by upper set 501 and trap 502 points and open forging,
Then by it is upper set 501 and trap 502 by fixture fixation welded, finally by after welding
Casing carries out polish.Because aero-engine generally requires offer ultra-large type power output, because
The overall dimensions of this aero-engine also than larger, corresponding casing size also than larger, typically
Above set 501 and the 502 height sum of trapping reach more than 290mm, upper set 501 and trap
502 diameter of up to 450mm.Further, since the requirement in casing itself quality and volume, on
Set 501 and trap 502 outer wall it is general all than relatively thin.It is special due to lacking in existing design
For the fixture of casing class part welding, in welding process, the size of casing each several part clamping force
With direction it is difficult to keep uniformity, part is easy to loosen when part is welded, and significantly impacts
The axiality of welding rear housing, can also affect welding quality, cause weld dangerous crackle occur,
Product is affected to use.
In sum, how providing one kind can make clamping force size and Orientation in casing welding process
Keep uniformity, it is ensured that casing accurate positioning, it is ensured that the satisfactory casing of casing axiality
Weld jig becomes those skilled in the art's problem demanding prompt solution.
The content of the invention
To provide a kind of casing weld jig, the casing is welded the technical problem to be solved in the present invention
Fixture can make clamping force size and Orientation in casing welding process keep equal by its structure design
It is even consistent, it is ensured that casing accurate positioning, it is ensured that casing axiality meets the requirements.
A kind of casing weld jig, for fixation and the positioning of casing in casing welding process, bag
Base, for the support of casing；
Mandrel, is vertically installed on the base, for the axially position of the casing；
Swelling disk, the mandrel is vertically arranged in the swelling disc centre, the swelling circle
Disk is used for the radial positioning of the casing；
Hold-down mechanism, the hold-down mechanism is arranged on the base, and the hold-down mechanism is used for
The compression of the casing.
Preferably, the hold-down mechanism includes pressing plate and connecting rod, and the pressing plate is used to be pressed on institute
State on casing, the connecting rod is used to for pressing plate to be fixed on the base.
Preferably, at least two-layer swelling disk is provided with the mandrel.
Preferably, it is provided with support bar between the adjacent layer swelling disk.
Preferably, airway is connected with the mandrel, the airway is for casing weldering
Shielding gas is passed through in termination process.
The invention has the beneficial effects as follows：The casing weld jig that the present invention is provided is set by its structure
Meter, can make clamping force size and Orientation in casing welding process keep uniformity, it is ensured that casing
Accurate positioning, it is ensured that casing axiality meets the requirements.
In order that those skilled in the art more fully understand the technical scheme in the application, below
By with reference to the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only some embodiments of the present application,
Rather than the embodiment of whole.
Based on the embodiment in the application, those of ordinary skill in the art are not making creativeness
The every other embodiment obtained under the premise of work, should all belong to the scope of the application protection.
Referring to accompanying drawing 2, accompanying drawing 2 provides a kind of being embodied as casing weld jig of the invention
Example, wherein, accompanying drawing 2 is a kind of casing weld jig overall structure diagram of the invention.
As shown in Figure 2, the casing weld jig is used for the fixation of casing in casing welding process
With positioning, including,
Base 1, for the support of casing.In being embodied as, it is contemplated that base 1 typically need to be put
Put on horizontal countertop, therefore the bottom surface of base 1 is usually horizontal plane, and on base 1
Surface is used for the support of casing, therefore, for convenience of the support of casing, the upper surface of base 1 is general
Match with the bottom shape of casing, the upper surface of base 1 can be arranged to horizontal plane, it is also possible to
It is arranged to other structures.
Mandrel 2, is vertically installed on base 1, for the axially position of casing.It is embodied as
In, mandrel 2 is positioned at the axle center of casing.
Swelling disk 3, mandrel 2 is vertically arranged in the center of swelling disk 3, and swelling disk 3 is used
In the radial positioning of casing.In being embodied as, swelling disk 3 can be clamped on the inner radius of casing,
The movement of casing radial direction in welding position fixing process is prevented, so as to realize the radial positioning of the casing.
Hold-down mechanism 4, hold-down mechanism 4 is arranged on base 1, and hold-down mechanism 4 is used for casing
Compression.In concrete welding process, hold-down mechanism 4 firmly can be pressed on base casing
On 1, such that it is able to effectively prevent the shake of casing, it is ensured that the welding quality of casing.
When casing is welded, comprise the steps (the hereafter i.e. explanation by taking the casing that accompanying drawing 1 is provided as an example
The specific implementation process of casing weld jig of the present invention)：
1st, by set 501 and 502 polishings of trapping on the component part of casing, and set is cleaned up
501 and trap 502 surface to be welded；
2nd, by upper set 501 and 502 bases 1 for being positioned over casing weld jig of the present invention of trapping
On, and by mandrel 2 be positioned at it is upper set 501 and trap 502 axle center at；
3rd, by swelling disk 3 be clamped on it is upper set 501 and trap 502 internal diameter on, by compress
Mechanism 4 will trap and 502 be pressed on base 1；
4th, it is upper set 501 and trap 502 junction allowance weld space, using manual argon arc
Weldering carries out tack-weld and controls solder joint volume, it is ensured that final solder joint can be covered by weld seam, be guarantor
Card welding quality, general control spot pitch 10mm, spot size 0.762-3.048mm, instead
Face diameter is less than 2.54mm；
5th, upper set 501 and the commissure between 502 of trapping are welded.
After the completion of welding, set 501 and weld seam between 502 of trapping can also be rolled using pincers worker,
Allow weld seam to flush, and pincers worker school type is carried out to defective place, so may further ensure that
The welding quality of casing, finally, then adopt machining apparatus processing casing both ends of the surface, it is cylindrical with
And perforate etc..
Generally, the casing weld jig that the present invention is provided can be relied on by its structure design
Mandrel 2 realizes that the axial direction of casing is positioned, and realizes that the radial direction of casing is entered by swelling disk 3
Row positioning, by hold-down mechanism 4 being fixed for the casing is realized, can make casing welding process
Middle clamping force size and Orientation keeps uniformity, it is ensured that casing accurate positioning, it is ensured that casing is same
Axle degree meets the requirements.
In the present embodiment, for convenience of compression of the hold-down mechanism 4 to casing, hold-down mechanism 4 includes
Pressing plate 401 and connecting rod 402, pressing plate 401 is used to be pressed on the casing, and connecting rod 402 is used
In pressing plate 401 is fixed on base 1.In being embodied as, machine is pressed on by pressing plate 401
On casket base plate, then pressing plate 401 is fixedly connected on base 1 by connecting rod 402, it is possible to
Firmly casing base plate is pressed on base 1.
It is the subject range for further expanding the casing weld jig in the present embodiment, mandrel 2
On be provided with least two-layer swelling disk 3.Thus, include several bodies regardless of the casing, all
The number of plies for changing swelling disk 3 can be passed through, arranging swelling disk 3 in vivo in each set is carried out
Radial positioning, certainly, for the distance between the diameter and adjacent layer of swelling disk 3, can
To be determined according to the structure of concrete casing.
In the present embodiment, to provide protection to the casing welding process, it is connected with mandrel 2 and leads
Trachea 6, airway 6 is used to be passed through shielding gas in casing welding process.Such as, casing welding
During be passed through argon in airway 6, can effectively prevent in welding process solder side with it is empty
The contact of oxygen in gas, effective guarantee weldquality.
In the present embodiment, to be further ensured that the stability of device, adjacent layer swelling disk 3 it
Between be provided with support bar 7.The casing weld jig provided in accompanying drawing 2 is provided with three layers of swelling
Disk 3, wherein, it is provided with support bar 7 between the two-layer swelling disk 3 in top layer and middle level.
A kind of casing weld jig provided by the present invention is described in detail above.Herein
In apply specific case to the present invention principle and embodiment be set forth, the above implement
The explanation of example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that
For those skilled in the art, under the premise without departing from the principles of the invention,
Some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the present invention
In scope of the claims.