CN110757023A

CN110757023A - Welding repair method and device for cartridge receiver parts

Info

Publication number: CN110757023A
Application number: CN201911031062.8A
Authority: CN
Inventors: 吕榛; 陈浪屿; 范雪莉; 皮克松; 陈张; 马秀萍; 嵇佳佳; 向建华; 吴锦波
Original assignee: AECC South Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-02-07
Anticipated expiration: 2039-10-28
Also published as: CN110757023B

Abstract

A welding repair method for a casing part comprises the following steps of A, providing a support ring, a tensioning ring, a driving disc and a pressing ring. An annular water tank is arranged in the support ring and used for clamping the casing part. And B, connecting a water path to enable the water to flow in the water tank, performing surfacing operation, and taking out the casing part after welding is completed to complete welding repair of the casing part. The welding repair method for the casing part can effectively control welding deformation, improve welding speed and improve production efficiency. The present invention provides an apparatus for use in the above method.

Description

Welding repair method and device for cartridge receiver parts

Technical Field

The invention relates to the technical field of welding, in particular to a method for welding and repairing a casing part of an aeroengine.

Background

Fig. 1 is a schematic cross-sectional structural diagram of a casing part of an aircraft engine, and referring to fig. 1, the casing part 1 in fig. 1 is formed by welding a first thin-wall member 11, a second thin-wall member 12 and a third thin-wall member 13 which are sequentially connected from inside to outside, the third thin-wall member 13 includes a first horizontal portion 131, a first connecting portion 132 and a second horizontal portion 133 which are sequentially arranged, and a downward first protruding portion 134 is arranged on a lower surface of the second horizontal portion 133.

In the use process after the third thin-walled member 13 is assembled to an aircraft engine, the upper surface of the second horizontal portion 133 of the third thin-walled member is used as a working surface, and the third thin-walled member is worn, so that the third thin-walled member needs to be returned to a factory for surfacing repair. In the overlay repair, an upper surface of the second horizontal portion 133 needs to be covered, that is, an annular region having an overlay thickness of about 1mm and an overlay width of about 5mm is formed on the upper surface of the second horizontal portion 133. The diameter D of the outer circle of the second horizontal part 133 is 342.5mm, and after surfacing repair, the diameter D is required to be not less than 342 mm.

In the conventional weld repair method, a jig is provided to support the lower surface of the first horizontal portion 131 and the lower surface of the second horizontal portion 133 inside the first protruding portion 134, and then the casing part 1 is clamped by the second thin-walled member 12 above the first horizontal portion 131. About 1mm with the thickness that the build-up welding relates to, the build-up welding width is the ring region about 5mm, divide equally into eight segmental arcs in circumference, and every segmental arc length is about 130mm, welds section by section, and in welding process, except by the welded segmental arc, other segmental arcs (also be other positions of the upper surface of second horizontal part 133) take the mode that the clamp plate compressed tightly to fix, and main welding parameters include: the welding current is 25-30A, the welding speed is about 21mm/min, and 4 hours are needed for welding one part. Therefore, the efficiency is low, and after the fixture is disassembled, the casing part 1 is easily deformed greatly and the diameter of the welded part shrinks, and the diameter shrinkage of the outer circle diameter D of the second horizontal part 133 may even reach 0.8-1mm, which means that the design requirement of not less than 342mm cannot be met, thereby causing the casing part 1 to be scrapped, and increasing the maintenance cost.

Disclosure of Invention

The present invention is directed to a method and apparatus for welding and repairing a casing component, which reduces or avoids the above-mentioned problems.

In order to solve the technical problem, the invention provides a welding repair method for a casing part, wherein the casing part is formed by welding a first thin-wall part, a second thin-wall part and a third thin-wall part which are sequentially connected from inside to outside, the third thin-wall part comprises a first horizontal part, a first connecting part and a second horizontal part which are sequentially arranged, and a downward first protruding part is arranged on the lower surface of the second horizontal part. The method for performing bead welding repair on the upper surface of the second horizontal portion includes the steps of,

step A, providing a support ring, a tensioning ring, a driving disc and a pressing ring.

The top of support ring be provided with the profile that the lower surface of second horizontal part corresponds, be provided with annular basin in the support ring, support ring outer wall symmetry be provided with a water supply connector and a water connectors of basin intercommunication.

And the top of the tensioning ring is provided with a molded surface corresponding to the lower surface of the first horizontal part and part of the inner surface of the first connecting part.

The driving disc comprises a threaded disc used for being connected with the tightening ring, and the threaded disc is connected with an operating disc through a connecting rod.

Firstly, the driving disc is connected with the tightening ring, then the tightening ring is arranged in the supporting ring, the tightening ring and the supporting ring are coaxial through a guide pin penetrating through the threaded disc, then the casing part is arranged on the supporting ring, the lower surface of the second horizontal part is attached to the top of the supporting ring, then the pressing ring is arranged on the casing part, and the casing part is clamped through the second thin-wall part above the first horizontal part. And then the operating plate is rotated, and the tightening ring is driven to move upwards through the threaded plate until the top of the tightening ring is tightly attached to the lower surface of the first horizontal part and the inner surface of part of the first connecting part.

And step B, communicating a water path through the water inlet joint and the water outlet joint, enabling the water to flow in the water channel, performing surfacing operation on the upper surface of the second horizontal part, rotating the operation disc after welding is completed, driving the tightening ring to move downwards through the threaded disc until the top of the tightening ring is separated from the lower surface of the first horizontal part and part of the inner surface of the first connecting part, detaching the pressing ring, taking out the casing part, and completing welding repair of the casing part.

Preferably, in step B, the water inlet pressure is set to 0.8 MPa.

Preferably, in the step B, when the surfacing operation is carried out, the upper surface of the second horizontal part is divided into 16 sections with the sequence number of z1-z16 in the circumferential direction, and the surfacing operation is carried out according to the sequence of z1-z9-z5-z13-z3-z11-z7-z15-z2-z10-z6-z14-z4-z12-z8-z 16.

Preferably, in step B, the movement locus of the welding machine during welding is a straight line pointing to the axis of the casing part, and the operation directions of the welding machine are opposite when adjacent welding seams are formed.

Preferably, in step B, each weld is 2mm wide.

Preferably, in step B, the welding parameters are: the welding current is 50-60A, and the welding speed is 42 mm/min.

The invention also provides a device for the method, which comprises a support ring, a tensioning ring, a drive disc and a press ring which are coaxially arranged, wherein the support ring and the drive disc are rotatably connected through a guide pin at the position of a central shaft, the drive disc is in threaded connection with the tensioning ring, and the press ring is connected with the support ring. The top of support ring be provided with the profile that the lower surface of second horizontal part corresponds, be provided with annular basin in the support ring, support ring outer wall symmetry be provided with a water supply connector and a water connectors of basin intercommunication. And the top of the tensioning ring is provided with a molded surface corresponding to the lower surface of the first horizontal part and part of the inner surface of the first connecting part.

Preferably, the driving disk comprises a threaded disk and an operating disk which are connected through a connecting rod, the supporting ring and the threaded disk and the operating disk are rotatably connected through a guide pin at a central shaft position, and the threaded disk is in threaded connection with the tightening ring.

Preferably, the support ring may be made by welding a bottom plate and a top ring. The top ring is provided with an annular groove used for forming the water tank, and the side wall of the top ring is provided with a water inlet hole and a water outlet hole communicated with the annular groove.

Preferably, the top ring is made of brass.

The welding repair method for the casing part can effectively control welding deformation, improve welding speed and improve production efficiency. The present invention provides an apparatus for use in the above method.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein the content of the first and second substances,

FIG. 1 is a schematic cross-sectional structural view of a casing component of an aircraft engine;

FIG. 2 is a schematic perspective exploded view of an apparatus for use in a method for welding repair of a casing component according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional structural view of the apparatus of FIG. 2;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

fig. 5 is a schematic view of the division of the welding zone.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

FIG. 1 is a schematic cross-sectional structural view of a casing component of an aircraft engine; FIG. 2 is a schematic perspective exploded view of an apparatus for use in a method for welding repair of a casing component according to an embodiment of the present invention; FIG. 3 is a schematic cross-sectional structural view of the apparatus of FIG. 2; the casing part 1 is shown in dotted lines in fig. 3, and fig. 4 is an enlarged view at a of fig. 3; fig. 5 is a schematic view of the division of the welding zone. Referring to fig. 1 to 5, the present invention provides a method for welding and repairing a casing part, wherein the casing part 1 is formed by welding a first thin-wall member 11, a second thin-wall member 12 and a third thin-wall member 13 which are sequentially connected from inside to outside, the third thin-wall member 13 includes a first horizontal portion 131, a first connecting portion 132 and a second horizontal portion 133 which are sequentially arranged, and a downward first protruding portion 134 is arranged on a lower surface of the second horizontal portion 133. The method for performing bead welding repair on the upper surface of the second horizontal portion 133 includes the steps of,

step A, providing a support ring 2, a tensioning ring 3, a driving disc 4 and a pressing ring 5.

The top of support ring 2 is provided with the profile that corresponds with the lower surface of second horizontal part 133, be provided with annular basin 21 in the support ring 2, support ring 2 outer wall symmetry be provided with a water supply connector 22 and a water connectors 23 of basin 21 intercommunication.

The top of the tightening ring 3 is provided with a profile corresponding to the lower surface of the first horizontal portion 131 and part of the inner surface of the first connecting portion 132.

The driving disk 4 comprises a threaded disk 41 for connection with the tensioning ring 3, and the threaded disk 41 is connected with an operating disk 43 through a connecting rod 42.

Firstly, the driving disc 4 is connected with the tightening ring 3, then the tightening ring 3 is arranged in the support ring 2, the tightening ring 3 and the support ring 2 are coaxial through a guide pin 6 penetrating through the threaded disc 41, then the casing part 1 is arranged on the support ring 2, the lower surface of the second horizontal part 133 is attached to the top of the support ring 2, then the pressing ring 5 is arranged on the casing part 1, and the casing part 1 is clamped through the second thin-wall part 12 above the first horizontal part 131. Then, the operating plate 43 is rotated to drive the tightening ring 3 to move upward through the threaded plate 41 until the top of the tightening ring 3 is closely attached to the lower surface of the first horizontal portion 131 and the inner surface of a portion of the first connecting portion 132.

And step B, communicating a waterway through the water inlet joint 22 and the water outlet joint 23 to ensure that the water body in the water tank 21 keeps flowing, wherein the water inlet pressure can be set to be 0.8 MPa.

The upper surface of the second horizontal part 133 is divided into 16 sections with the sequence number of z1-z16 in the circumferential direction, and the surfacing operation is carried out according to the sequence of z1-z9-z5-z13-z3-z11-z7-z15-z2-z10-z6-z14-z4-z12-z8-z 16.

After the welding of all 16 sections of areas is completed, the operation plate 43 is rotated, the tightening ring 3 is driven by the threaded plate 41 to move downwards until the top of the tightening ring 3 is separated from the contact with the lower surface of the first horizontal part 131 and part of the inner surface of the first connecting part 132, the pressing ring 2 is detached, the casing part 1 is taken out, and the welding repair of the casing part 1 is completed.

During welding, the welding parameters may be set as: the welding current is 50-60A, and the welding speed is 42 mm/min.

In the present invention, the top of the support ring 2 can be closely attached to almost the entire area of the lower surface of the second horizontal portion 133, and the annular water tank 21 is disposed in the support ring 2, so that heat generated at the welding portion can be effectively transferred to the water tank 21 and taken away by water flow during the welding process, thereby well preventing thermal deformation of the second horizontal portion 133.

Referring to fig. 3 and 4, in order to better show the composition structure of the support ring 2, the water inlet joint 22 in fig. 3 is omitted in fig. 4, the support ring 2 may be formed by welding a bottom plate 24 and a top ring 25, so that during production, an annular groove may be directly formed on the end surface of the top ring 25 connected to the bottom plate 24, a water inlet hole and a water outlet hole are formed on the side wall, after the top ring 25 is welded to the bottom plate 24, the bottom plate 24 may form a seal for the annular groove, thereby forming the water tank 21, and then the water inlet joint 22 and the water outlet joint 23 may be formed by connecting joints respectively at the water inlet hole and the water outlet hole. Therefore, the process difficulty and the cost can be greatly reduced. In addition, the top ring 25 may be made of brass, which is more advantageous for heat conduction.

Referring to fig. 4, when the annular groove for forming the water tank 21 is formed, there may be a portion of the structure entering the annular groove in consideration of the fact that the joint is inserted into the water inlet hole and the water outlet hole, and thus, the annular groove at the positions of the water inlet hole and the water outlet hole may be formed with an arc-shaped relief groove 211, which may ensure no influence on the assembly of the joint.

The tightening ring 3 can move vertically under the driving of the driving disc 4, so that the tight fit between the top of the tightening ring 3 and the lower surface of the first horizontal portion 131 and the inner surface of part of the first connecting portion 132 can be ensured. So that the deformation of the connection between the first horizontal portion 131 and the first connection portion 132 can be effectively prevented. The overall deformation of the casing part 1 can be effectively controlled.

Referring to fig. 2 and 3, the threaded disc 41 is in threaded connection with the inner hole of the tightening ring 3, and the connecting rod 42 is used to rotate the operating disc 43 to drive the threaded disc 41 to rotate, so as to control the vertical movement of the tightening ring 3. Although three connecting rods 3 are shown, only two connecting rods 3 can be provided as long as the strength is enough, and the height of the connecting rods 3 only needs to ensure that the operating panel 43 can be positioned outside the top ring 25 after assembly, so that the operation is convenient.

The support ring 2 the bracing ring 3 with the clamping ring 5 directly still can set up a plurality of uide pins (post) and locating pin, can do benefit to the assembly like this.

Fig. 5 is a schematic view of the division of the welding zone. Referring to fig. 5, the upper surface of the second horizontal portion 133 (i.e., an annular region with a thickness of about 1mm involved in bead welding and a bead welding width of about 5 mm) is divided into 16 segments of regions numbered z1-z16 in the circumferential direction, and bead welding operations are performed in the order of z1-z9-z5-z13-z3-z11-z7-z15-z2-z10-z6-z14-z4-z12-z8-z 16. Therefore, the influence of heat generated by welding on the thermal deformation of adjacent areas in the subsequent welding process can be reduced to the maximum extent.

Referring to the arrow direction in fig. 5, the movement locus of the welding machine during welding is a straight line pointing to the axis of the casing part 1, the effective width of each welding seam is about 2mm, and the operation directions of the welding machine are opposite when adjacent welding seams are formed, that is, during welding, two adjacent welding seams are formed in a reciprocating welding process. This allows for uniform coverage of the weld area and may even out the effects of thermal distortion in the radial direction.

The invention also provides a device for the method, which comprises a support ring 2, a tensioning ring 3, a driving disc 4 and a pressing ring 5 which are coaxially arranged, wherein the support ring 2 and the driving disc 4 are rotatably connected through a guide pin 6 at the central axis position, the driving disc 4 is in threaded connection with the tensioning ring 3, and the pressing ring 5 is connected with the support ring 2. The top of support ring 2 is provided with the profile that corresponds with the lower surface of second horizontal part 133, be provided with annular basin 21 in the support ring 2, support ring 2 outer wall symmetry be provided with a water supply connector 22 and a water connectors 23 of basin 21 intercommunication. The top of the tightening ring 3 is provided with a profile corresponding to the lower surface of the first horizontal portion 131 and part of the inner surface of the first connecting portion 132.

In a preferred embodiment, the driving disk 4 comprises a threaded disk 41 and an operating disk 43 connected by a connecting rod 42, the supporting ring 2 and the threaded disk 41 and the operating disk 43 are rotatably connected by a guide pin 6 at a central shaft position, and the threaded disk 41 is in threaded connection with the tightening ring 3.

In a preferred embodiment, the support ring 2 may be made by welding a bottom plate 24 and a top ring 25. The top ring 25 is provided with an annular groove for forming the water tank 21, and the side wall of the top ring 25 is provided with a water inlet hole and a water outlet hole communicated with the annular groove.

In a preferred embodiment, the top ring is made of brass.

It should be appreciated by those of skill in the art that while the present invention has been described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including technical equivalents which are related to the embodiments and which are combined with each other to illustrate the scope of the present invention.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the invention.

Claims

1. A welding repair method for a cartridge receiver part is characterized in that the cartridge receiver part is formed by welding a first thin-wall part, a second thin-wall part and a third thin-wall part which are sequentially connected from inside to outside, the third thin-wall part comprises a first horizontal part, a first connecting part and a second horizontal part which are sequentially arranged, and a downward first protruding part is arranged on the lower surface of the second horizontal part. The method for performing bead welding repair on the upper surface of the second horizontal portion includes the steps of,

And step B, communicating a water path through the water inlet joint and the water outlet joint to enable the water body to flow in the water tank 21, performing surfacing operation on the upper surface of the second horizontal part, rotating the operation disc after welding is completed, driving the tightening ring to move downwards through the threaded disc until the top of the tightening ring is separated from the lower surface of the first horizontal part and part of the inner surface of the first connecting part, detaching the pressing ring, taking out the casing part, and completing welding repair of the casing part.

2. The method according to claim 1, wherein in step B, the water inlet pressure is set to 0.8 MPa.

3. A method according to claim 1, wherein in step B, when performing the bead-welding operation, the upper surface of the second horizontal portion is divided circumferentially into 16 segments of area numbered z1-z16, and the bead-welding operation is performed in the order z1-z9-z5-z13-z3-z11-z7-z15-z2-z10-z6-z14-z4-z12-z8-z 16.

4. The method of claim 3, wherein in step B, the welding machine moves along a straight line pointing to the axis of the casing part, and the welding machine moves in the opposite direction when forming the adjacent welding seam.

5. The method of claim 4, wherein in step B, each weld is 2mm wide.

6. The method according to claim 5, wherein in step B, the welding parameters are: the welding current is 50-60A, and the welding speed is 42 mm/min.

7. An apparatus for use in the method of claim 1, comprising a support ring, a tightening ring, a drive plate, and a compression ring, the support ring and the drive plate being rotatably connected by a guide pin at a central axis location, the drive plate being threadably connected to the tightening ring, and the compression ring being connected to the support ring. The top of support ring be provided with the profile that the lower surface of second horizontal part corresponds, be provided with annular basin in the support ring, support ring outer wall symmetry be provided with a water supply connector and a water connectors of basin intercommunication. And the top of the tensioning ring is provided with a molded surface corresponding to the lower surface of the first horizontal part and part of the inner surface of the first connecting part.

8. The apparatus of claim 7, wherein the drive disk comprises a threaded disk and an operating disk connected by a connecting rod, the support ring is rotatably connected to the threaded disk and the operating disk by a guide pin at a central axis location, and the threaded disk is threadedly connected to the tightening ring.

9. The apparatus of claim 7, wherein the support ring is fabricated by welding a bottom plate and a top ring. The top ring is provided with an annular groove used for forming the water tank, and the side wall of the top ring is provided with a water inlet hole and a water outlet hole communicated with the annular groove.

10. The apparatus of claim 9, wherein the top ring is made of brass.