CN113210897B

CN113210897B - Composite tool for welding thrust chamber body and welding process thereof

Info

Publication number: CN113210897B
Application number: CN202110435147.3A
Authority: CN
Inventors: 杨瑞康; 袁宇; 宣智超; 韩建业
Original assignee: Landspace Technology Co Ltd
Current assignee: Landspace Technology Co Ltd
Priority date: 2019-03-04
Filing date: 2019-03-04
Publication date: 2022-09-09
Anticipated expiration: 2039-03-04
Also published as: CN113210898A; CN109834396B; CN109834396A; CN113210897A; CN113210898B

Abstract

The application provides a be used for thrust room body portion welded composite frock and welding process thereof for thrust room body portion welded composite frock includes: the clamping device comprises a mandrel assembly, a clamping sleeve tire, a pressure ring assembly and a pressing assembly; the mandrel assembly, the sleeve clamping tire, the pressure ring assembly and the pressure applying assembly are matched for use, and the body part pushed by the thrust chamber and the inner wall of the spray pipe sleeve section are clamped so as to assist butt welding of the body part of the thrust chamber and the spray pipe sleeve section. Compare with the required many sets of single frock of current spray tube welding, this application composite frock not only the function is more complete, the quantity of the single frock that can significantly reduce moreover, further reduces the preparation process before the welding, simplifies production technology, reduces the manufacturing cost of spray tube.

Description

Composite tool for welding thrust chamber body and welding process thereof

The application is a divisional application of an invention patent application with the application date of 2019, 03 and 04, the application number of 201910159991.0 and the name of 'composite tool for thrust chamber welding and thrust chamber welding process'.

Technical Field

The application belongs to the technical field of rocket engine manufacturing, and particularly relates to a composite tool for welding a thrust chamber body and a welding process thereof.

Background

The jet pipe is a part in the liquid rocket engine, which is responsible for accelerating the expansion and ejection of fuel gas to obtain reverse thrust. In order to bear the high temperature of the fuel gas, the spray pipe generally adopts a cooling jacket structure, and the heat of the fuel gas is taken away by utilizing the flow of hundreds of micro channels of the propellant in the spray pipe structure, so that the metal material of the spray pipe structure is prevented from being ablated and burnt by the fuel gas. The cooling jacket structure of the spray pipe consists of a milled groove inner wall and a milled groove outer wall, and all parts of the structure can be connected together by adopting welding, bolt connection and other modes after being manufactured respectively.

The manufacturing method of the existing spray pipe cooling jacket structure mainly comprises the following steps: vacuum pressure brazing, diffusion welding, electroforming, and welding. A plurality of sets of tools are needed in the existing spray pipe manufacturing process to ensure the welding of all parts. The used tools comprise a series of matched tools such as a pressing tool, a brazing tool, a welding tool and an electroforming tool. In the production process of the existing spray pipe, the tools respectively bear the functions of the tools and have no universality, so that the following problems exist in the manufacturing process of the spray pipe: the preparation procedures before welding are many, the process is complex, the realization difficulty is high, the equipment is expensive, the debugging/trial-manufacturing period is long, the production energy consumption is high, the mechanical property of the joint is lower than that of the base metal, and the like.

Disclosure of Invention

In order to overcome the problems in the related art at least to a certain extent, the application provides a composite tool for welding a thrust chamber body and a welding process thereof.

According to a first aspect of the embodiments of the present application, the present application provides a composite tool for welding a body part of a thrust chamber, which includes: the clamping device comprises a mandrel assembly, a clamping sleeve tire, a pressure ring assembly and a pressing assembly;

the mandrel assembly, the sleeve clamping tire, the pressure ring assembly and the pressure applying assembly are matched for use, and the body part pushed by the thrust chamber and the inner wall of the spray pipe sleeve section are clamped to assist butt welding of the body part of the thrust chamber and the spray pipe sleeve section.

In the composite tool for welding the body part of the thrust chamber, the mandrel component is fixedly arranged on the inner central axis of the jacket tire along the length direction of the jacket tire, and the jacket tire is used for positioning the inner wall and the outer wall of the jacket section of the spray pipe;

the pressure ring assembly is used for pressing the inner wall and the outer wall of the jacket section of the spray pipe on the jacket tire;

the pressing assembly is used for adjusting the butt joint gap between the body of the thrust chamber and the welding line of the jacket section of the spray pipe to a preset value.

In the composite tool for welding the thrust chamber body, the mandrel component comprises a central shaft, a mandrel nut and a large-end clamping steel sleeve; the jacket tire comprises a jacket tire I section and a jacket tire II section;

the clamping sleeve tire II section adopts a circular truncated cone structure, and the clamping sleeve tire I section is connected to the small-caliber end of the clamping sleeve tire II section;

one end of the central shaft sequentially penetrates through the sleeve clamping tire I section and the sleeve clamping tire II section along the length direction of the sleeve clamping tire, and is fixed at the large-caliber end of the sleeve clamping tire II section through the large-end clamping steel sleeve; the other end of the central shaft is fixedly connected with the pressure applying assembly through the mandrel nut.

Furthermore, an air path and liquid path nozzle is arranged on the section I of the jacket tire and used for introducing working media required by welding into the section II of the jacket tire.

Further, the section II of the jacket tire comprises an outer cylinder, an inner cylinder and ribs;

the outer cylinder and the inner cylinder are coaxially arranged along the length direction of the II section of the jacket tire, and a plurality of ribs are fixedly arranged between the outer cylinder and the inner cylinder in the circumferential direction; and the width of each rib varies with the shape of the outer cylinder.

Further, the pressure ring assembly comprises a jacket outer pressure ring, a pressure ring bolt and a pressure ring nut;

the two jacket outer rings are sleeved on the outer wall of the jacket tire II section close to the large-caliber end of the jacket tire II section in parallel and are used for tightly pressing the inner wall and the outer wall of the spray pipe jacket section on the jacket tire II section;

and the compression ring bolt and the compression ring nut are arranged on the jacket outer pressure ring along the circumferential direction and used for leveling and clamping the inner wall and the outer wall of the spray pipe jacket section pressed on the jacket tire II section.

Further, the pressure applying assembly comprises a pressure applying upper plate, a pressure applying lower plate, an O-shaped rubber ring and a second adjusting bolt;

the pressing upper plate and the pressing lower plate are arranged at one end, close to the small-caliber end of the jacket tire II section, of the central shaft along the direction from the small-caliber end to the large-caliber end of the jacket tire II section, and the pressing lower plate is used for being connected with the cylindrical end of the body part of the thrust chamber through the O-shaped rubber ring;

and the second adjusting bolt is circumferentially arranged on the pressure applying upper plate and is used for matching with the pressure applying upper plate and the pressure applying lower plate to adjust the butt joint gap between the body part of the thrust chamber and the welding seam of the spray pipe jacket section to a preset value.

According to a second aspect of an embodiment of the present application, the present application further provides a welding process of the composite tool for welding the body part of the thrust chamber, where the welding process includes the following steps:

clamping the body part of the thrust chamber and the inner wall of the spray pipe clamping sleeve section, and butt-welding the body part of the thrust chamber and the spray pipe clamping sleeve section;

and taking down the welded thrust chamber from the jacket tire to finish tire unloading.

In the welding process of the composite tool for welding the body part of the thrust chamber, the body part of the thrust chamber and the inner wall of the sleeve section of the spray pipe are clamped, and the butt welding process of the body part of the thrust chamber and the sleeve section of the spray pipe is as follows:

clamping the inner wall and the outer wall of the jacket section of the spray pipe welded by the longitudinal rib welding seam on the second section of the jacket tire, and pressing the jacket section of the spray pipe by an outer pressing ring of the jacket; the inner wall and the outer wall of the jacket section of the spray pipe are leveled and clamped through compression ring nuts and compression ring bolts which are distributed in the circumferential direction by matching with a height gauge;

sequentially loading the body part of the thrust chamber of the machined part to be welded, the O-shaped rubber ring, the pressing lower plate, the pressing upper plate, a second adjusting bolt and a mandrel nut from one end of a central shaft close to the small-caliber section of the II section of the jacket tire, and adjusting the butt joint gap between the body part of the thrust chamber and the welding seam of the nozzle jacket section to a preset value by adjusting the second adjusting bolt on the pressing upper plate;

passing through preformed holes correspondingly arranged on the upper pressing plate and the lower pressing plate, introducing welding shielding gas into the II section of the jacket tire through a gas circuit and liquid circuit nozzle, and performing girth weld joint welding on the body part of the thrust chamber and the inner wall of the sleeve section of the spray pipe clamp;

and stopping introducing the shielding gas, passing through the preformed holes correspondingly arranged on the upper pressing plate and the lower pressing plate, introducing welding cooling water into the II section of the jacket tire through the gas circuit and liquid circuit pipe nozzle, and performing girth welding on the outer wall overlapping ring of the sleeve section of the nozzle pipe clamp to complete butt welding of the body part of the thrust chamber and the sleeve section of the nozzle pipe clamp.

According to the above embodiments of the present application, at least the following advantages are obtained: adopt this application to be used for thrust chamber body portion welded composite frock to carry out the clamping to the body portion of thrust chamber and the inner wall of spout pipe clamp cover section, can realize the girth weld welding of the body portion of thrust chamber and the inner wall of spout pipe clamp cover section, and the girth weld welding of the outer wall overlap joint ring of spout pipe clamp cover section, finally accomplish the butt welding to the body portion of thrust chamber and spout pipe clamp cover section, compare with the required many sets of single frock of thrust chamber body portion welding among the prior art, the composite frock of this application not only the function is more complete, and the quantity of the single frock that can significantly reduce, further reduce the preparation process before the welding, simplify production technology, reduce the manufacturing cost etc. of spray tube.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification of the application, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic view of a use state of a composite tool for welding in a short mandrel state according to an embodiment of the present application.

Fig. 2 is a schematic view of a use state of the composite tool for welding in a long mandrel state according to the specific embodiment of the present application.

Fig. 3 is a schematic diagram of relative positions of longitudinal rib welds of a nozzle pipe clamp sleeve section in a short mandrel state of the composite tool according to the embodiment of the present application.

Fig. 4 is a schematic connection relationship between a body of a thrust chamber and inner and outer walls of a jacket section of a nozzle in a composite tool for welding according to an embodiment of the present disclosure.

Description of reference numerals:

1. a mandrel assembly; 11. a central shaft; 12. a spindle nut; 13. clamping a steel sleeve at the large end;

2. clamping a sleeve tire; 21. clamping a sleeve tire I section; 211. a road fluid road pipe nozzle; 212. tightening the tire bolt; 22. clamping a sleeve tire II section; 221. an outer cylinder; 222. an inner barrel; 223. a rib; 224. lightening holes;

3. a pressure ring assembly; 31. jacket outer pressure ring; 32. pressing a ring bolt; 33. pressing a ring nut;

4. pressing the components; 41. pressing a cover plate; 42. a cover plate shaft sleeve; 43. pressing a backing ring; 44. a first adjusting bolt;

5. a pressure application assembly; 51. pressing an upper plate; 52. pressing the lower plate; 53. an O-shaped rubber ring; 54. and a second adjusting bolt.

10. The inner wall and the outer wall of the spray pipe clamping sleeve section; 101. a weld track; 20. a body portion of the thrust chamber; 30. the outer wall is connected with a ring.

Detailed Description

For the purpose of promoting a clear understanding of the objects, aspects and advantages of the embodiments of the present application, reference will now be made to the accompanying drawings and detailed description, wherein like reference numerals refer to like elements throughout.

The illustrative embodiments and descriptions of the present application are provided to explain the present application and not to limit the present application. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.

As used herein, "first," "second," …, etc., are not specifically intended to mean in a sequential or chronological order, nor are they intended to limit the application, but merely to distinguish between elements or operations described in the same technical language.

With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

As used herein, "and/or" includes any and all combinations of the described items.

References to "plurality" herein include "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".

As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. In general, the range of slight variations or errors that such terms modify may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.

Certain terms used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.

Fig. 1 is a schematic view of a use state of a composite tool for welding in a short mandrel state according to an embodiment of the present application. Fig. 2 is a schematic view of a use state of the composite tool for welding in a long mandrel state according to the specific embodiment of the present application.

As shown in fig. 1, 2 and 4, the composite tooling for welding of the present application includes a mandrel assembly 1, a clamping fixture 2, a pressing ring assembly 3, a pressing assembly 4 and a pressing assembly 5. Under the state of a short mandrel, the mandrel component 1, the jacket tire 2, the pressure ring component 3 and the pressing component 4 are matched for use, and the inner wall 10 and the outer wall 10 of the spray pipe jacket section in the thrust chamber are positioned, clamped and pressed, so that the longitudinal rib welding seam of the spray pipe jacket section is conveniently welded; in a long mandrel state, the mandrel component 1, the jacket tire 2, the pressure ring component 3 and the pressure applying component 5 are matched for use, and the body part 20 of the thrust chamber and the inner wall of the spray pipe jacket segment are clamped, so that the circumferential weld welding of the body part 20 of the thrust chamber and the inner wall of the spray pipe jacket segment and the circumferential weld welding of the outer wall overlapping ring 30 of the spray pipe jacket segment are conveniently completed; finally, the butt welding of the body part 20 of the thrust chamber and the sleeve section of the nozzle pipe is finished.

This application is arranged in welded compound frock, and dabber subassembly 1 is fixed along the length direction who presss from both sides cover child 2 and is set up on the inside axis of pressing from both sides cover child 2, presss from both sides cover child 2 and is used for fixing a position the spray tube and presss from both sides the cover section inside and outside wall. And the pressure ring assembly 3 is used for pressing the inner wall and the outer wall of the spray pipe jacket segment on the jacket tire 2. And the pressing component 4 is used for pressing and attaching the inner wall and the outer wall of the jacket section of the spray pipe in a short mandrel state of the composite tool. The pressing assembly 5 is used for adjusting the butt joint gap between the body part 20 of the thrust chamber and the welding seam of the nozzle jacket section to a preset value in the long mandrel state of the composite tool.

The composite tool for welding can simultaneously realize the pressing of the inner wall and the outer wall 10 of the spray pipe jacket section in the thrust chamber, the welding of the longitudinal rib welding line of the spray pipe jacket section, the circumferential welding of the inner wall of the body part 20 of the spray pipe jacket section and the thrust chamber and the circumferential welding of the outer wall overlapping ring 30 of the spray pipe jacket section. For many sets of single frock such as the required clamp cover pressfitting frock of current spray tube welding, clamp cover frock of brazing, clamp cover body portion inner wall welding frock, clamp cover body portion outer wall overlap ring 30 welding frock, this application is used for the quantity of the single frock of welded that can significantly reduce, reduces the occupation of land and the management of many sets of single frock, reduces the risk that many sets of single frock use was makeed mistakes, further reduces the manufacturing cost of spray tube.

In the present embodiment, the mandrel assembly 1 comprises a central shaft 11, a mandrel nut 12 and a large-end clamping steel sleeve 13, and the jacketed tire 2 comprises a jacketed tire I section 21 and a jacketed tire II section 22.

Wherein, press from both sides cover child II section 22 and adopt the round platform structure, press from both sides cover child I section 21 and connect the small-bore end at press from both sides cover child II section 22. Specifically, the jacketed tire I section 21 is connected to the jacketed tire II section 22 by the tight tire bolt 212. The jacket tire I section 21 is also provided with a gas path and liquid path nozzle 211, and the gas path and liquid path nozzle 211 is used for introducing working media such as cooling water or shielding gas required by welding into the jacket tire II section 22.

One end of the central shaft 11 sequentially passes through the jacket tire I section 21 and the jacket tire II section 22 along the length direction of the jacket tire 2, and is fixed at the large-caliber end of the jacket tire II section 22 through the large-end clamping steel sleeve 13. The other end of the central shaft 11 is fixedly connected with the pressing component 4 or the pressing component 5 through a mandrel nut 12.

Specifically, the central shaft 11 may employ a short mandrel or a long mandrel. The short mandrel and the long mandrel can be two independent mandrels, and the long mandrel can also be a long mandrel obtained by lengthening the short mandrel through a coupler.

The jacket tire I section 21 is made of stainless steel materials, so that the accuracy of clamping a to-be-welded part can be guaranteed, and the abrasion resistance of the to-be-welded part is guaranteed. The jacket tire II section 22 is made of materials such as aluminum, aluminum alloy, copper alloy or iron and has good heat dissipation performance. The jacket tire 2 adopts a split tire design, and can ensure that welding shrinkage allowance is reserved while positioning is realized, so that the nozzle jacket is clamped on the tire once again after welding shrinkage deformation.

Specifically, the jacketed tire II section 22 includes an outer cylinder 221, an inner cylinder 222, and ribs 223. Wherein, along the length direction of the jacket tire II section 22, the outer cylinder 221 and the inner cylinder 222 are coaxially arranged, a plurality of ribs 223 are circumferentially and fixedly arranged between the outer cylinder 221 and the inner cylinder 222, and the width of each rib 223 is changed along with the shape of the outer cylinder 221. In order to reduce the weight of the jacketed tire II section 22, each rib 223 is provided with a plurality of weight reduction holes 224.

In the present embodiment, the pressure ring assembly 3 includes a jacket outer pressure ring 31, a pressure ring bolt 32, and a pressure ring nut 33. The two jacket outer rings 31 are sleeved on the outer wall of the jacket tire II section 22 close to the large-caliber end of the jacket tire II section 22 in parallel and are used for pressing the inner wall and the outer wall of the spray pipe jacket section on the jacket tire II section 22. And a pressure ring bolt 32 and a pressure ring nut 33 are arranged on the jacket outer ring 31 along the circumferential direction and used for leveling and clamping the inner wall and the outer wall of the nozzle jacket segment pressed on the jacket tire II segment 22.

In the present embodiment, the pressing assembly 4 includes a pressing cover 41, a cover sleeve 42, a pressing backing ring 43 and a first adjusting bolt 44. The pressing cover plate 41 is assembled at one end of the central shaft 11 close to the small-caliber end of the jacket tire II section 22 through a cover plate shaft sleeve 42, the edge of the opening end of the pressing cover plate 41 is arranged at the outer side of the inner wall and the outer wall of the nozzle jacket section to be welded, and the pressing backing ring 43 and the first adjusting bolt 44 are used for pressing and attaching the inner wall and the outer wall of the nozzle jacket section to be welded and adjusting to a preset required pressing state. A press fit backing ring 43 is provided between the inside of the open end edge of the press fit cover plate 41 and the nozzle jacket segment to be welded to mitigate damage to the nozzle jacket segment. The first adjusting bolts 44 are arranged on two side walls of the pressing cover plate 41 forming the opening end, and the inner wall and the outer wall of the jacket section of the spray pipe can be aligned through the first adjusting bolts 44, so that the joint state before welding of the inner wall and the outer wall of the jacket section of the spray pipe is ensured.

In the present embodiment, the pressing assembly 5 includes a pressing upper plate 51, a pressing lower plate 52, an O-ring rubber 53, and a second adjusting bolt 54. The upper pressing plate 51 and the lower pressing plate 52 are arranged at one end of the central shaft 11 close to the small-caliber end of the jacketed tire II section 22 in the direction from the small-caliber end to the large-caliber end of the jacketed tire II section 22, and the lower pressing plate 52 is used for connecting with the cylindrical end of the body portion 20 of the thrust chamber through an O-shaped rubber ring 53. And a second adjusting bolt 54 is circumferentially arranged on the pressing upper plate 51 and is used for matching with the pressing upper plate 51 and the pressing lower plate 52 to adjust the gap between the butt joint of the body part 20 of the thrust chamber and the welding seam of the nozzle jacket section to a preset value.

The lower pressing plate 52 adopts an O-shaped rubber ring 53 for centering, and can realize self-adaptive centering within 2 mm. The gap of the butt joint annular seam of the thrust chamber can be adjusted through 8 second adjusting bolts 54 on the upper pressing plate 51, and the requirement on the gap before welding is guaranteed.

The composite tool for welding adopts the design of the replaceable mandrel, and the mandrel can be replaced in a clamping state, so that the process of repeatedly clamping the tool can be omitted, the error of repeated positioning of composite work is reduced, and the welding precision is improved. The sleeve clamping tire II section 22 is supported in a circular truncated cone-shaped positioning mode, the workload of welding, clamping and positioning can be effectively reduced, and the welding positioning precision is improved.

The application is used for the welded composite tool, can be applicable to the welding of all kinds of high-energy ion beams such as laser welding and plasma welding to parts to be welded.

Based on the composite tool for welding that this application provided, this application still provides a thrust chamber welding process, and it includes following step:

s1, positioning, clamping and pressing the inner wall and the outer wall 10 of the spray pipe jacket section in the thrust chamber in the short mandrel state of the composite tool, and welding longitudinal rib welding seams of the inner wall and the outer wall of the spray pipe jacket section, wherein the specific process is as follows:

s11, clamping the inner wall and the outer wall of the nozzle clamp sleeve section of the to-be-welded part to the second section 22 of the clamp sleeve tire, and pressing the inner wall and the outer wall through the outer clamp ring 31 of the clamp sleeve. And the inner wall and the outer wall of the jacket section of the spray pipe are leveled and clamped through a compression ring nut 33 and a compression ring bolt 32 which are distributed in the circumferential direction by matching with a height gauge.

S12, sequentially arranging a cover plate shaft sleeve 42, a press-fit cover plate 41 and a mandrel nut 12 at one end of the short mandrel close to the small-caliber end of the jacket tire II section 22, arranging a press-fit backing ring 43 between the edge of the press-fit cover plate 41 and the jacket tire I section 21, pressing and attaching the inner wall and the outer wall of the to-be-welded spray pipe jacket section through the press-fit cover plate 41, and adjusting the press-fit cover plate 41 to a preset press-fit state through 16 first adjusting bolts 44 at the edge of the press-fit cover plate 41.

And S13, introducing cooling water through the gas path and liquid path nozzle 211, and welding the longitudinal rib welding seam under a cooling condition along the welding seam track 101 preset in the length direction of the jacket tire II section 22 according to the welding seam position shown in the figure 3.

S2, taking down the inner and outer walls of the jacket section of the spray pipe welded by the longitudinal rib welding seam from the jacket tire 2 to finish the lower tire, wherein the concrete process is as follows:

s21, the mandrel nut 12, the pressing cover plate 41, the cover plate shaft sleeve 42, the pressing backing ring 43 and the first adjusting bolt 44 are sequentially dismounted.

And S22, sequentially dismounting the pressure ring nut 33, the jacket outer pressure ring 31 and the pressure ring bolt 32, and dismounting the inner wall and the outer wall of the spray pipe jacket segment to finish the tire dismounting.

S3, clamping the body part 20 of the thrust chamber and the inner wall of the spray pipe clamping sleeve section in the long mandrel state of the composite tool, and butt-welding the body part 20 of the thrust chamber and the spray pipe clamping sleeve section, wherein the specific process is as follows:

s31, the composite tool is used for replacing the short mandrel with the long mandrel in the clamping state of the tapered locating surface and the clamping jaw of the positioner.

And S32, re-clamping the inner wall and the outer wall of the nozzle jacket section welded by the longitudinal rib welding seam to the II section of the jacket tire 2, and pressing the inner wall and the outer wall by the jacket outer pressure ring 31. And the inner wall and the outer wall of the jacket section of the spray pipe are leveled and clamped by matching with a height gauge and through a compression ring nut 33 and a compression ring bolt 32 which are distributed in the circumferential direction.

S33, sequentially installing the body part 20 of the thrust chamber of the to-be-welded piece, the O-shaped rubber ring 53, the pressing lower plate 52, the pressing upper plate 51, the second adjusting bolt 54 and the mandrel nut 12 from one end of the central shaft 11 close to the small-diameter section of the jacket tire II section 22, and adjusting the butt joint gap between the body part 20 of the thrust chamber and the welding seam of the nozzle jacket section to a preset value by adjusting 8 second adjusting bolts on the pressing upper plate 51.

S34, passing through the preformed holes correspondingly arranged on the upper pressing plate 51 and the lower pressing plate 52, introducing welding shielding gas into the II section of the jacket tire through the gas path and liquid path nozzle 211, and performing circumferential weld welding on the body part 20 of the thrust chamber and the inner wall of the sleeve section of the nozzle tube.

And S35, stopping introducing the protective gas, penetrating through the preformed holes correspondingly arranged on the upper pressing plate 51 and the lower pressing plate 52, introducing welding cooling water into the jacket tire II section 22 through the gas path and liquid path nozzle 211, and performing girth welding on the outer wall overlapping ring 30 of the jacket tire section. At this point, the butt welding of the body portion 20 of the thrust chamber and the nozzle clamp sleeve section is completed.

S4, taking down the welded thrust chamber from the jacket tire 2 to finish the tire unloading, wherein the specific process comprises the following steps:

s41, sequentially detaching the mandrel nut 12, the second adjusting bolt 54, the pressing upper plate 51, the pressing lower and the O-shaped rubber ring 53.

And S42, sequentially detaching the pressure ring nut 33, the jacket outer pressure ring 31 and the pressure ring bolt 32, detaching the body part 20 of the thrust chamber and the inner and outer walls of the nozzle jacket segment, and completing tyre unloading.

In the welding process of the thrust chamber, the jacket tire II section 22 adopts one of an aluminum tire, an aluminum alloy tire, a copper alloy tire, an iron tire and the like with high heat conductivity, and the design of a cooling liquid film is added, so that the temperature rise in the welding process can be obviously reduced, and the welding stress in the welding process of the longitudinal rib welding seam of the inner wall and the outer wall of the spray pipe jacket section can be effectively reduced. Meanwhile, working media such as cooling water or shielding gas required by welding are introduced into the II section 22 of the jacket tire through the gas circuit and liquid circuit nozzle 211, so that two cooling modes of air cooling and water cooling can be selected in the welding process of the lap joint ring, and the thermal deformation of the girth welding of the lap joint ring is effectively reduced.

In the welding process of the thrust chamber, the composite tool changes a short mandrel into a long mandrel under the conical positioning surface of the positioner and the clamping state of the clamping jaws, then sequentially loads the body part 20 of the thrust chamber and the pressing component 5, adjusts the butt joint gap between the body part 20 of the thrust chamber and the welding seam of the jacket section of the spray pipe to a preset value by adjusting 8 second adjusting bolts on the pressing upper plate 51, and introduces welding protection gas into the jacket tire II section 22 through the gas path and liquid path nozzle 211 to weld dissimilar metals between the body part 20 of the thrust chamber and the inner wall of the jacket section of the spray pipe. Then cooling water is introduced to complete the welding of the overlapping ring 30 on the outer wall of the jacket section of the spray pipe, the tyre of the thrust chamber is removed through the tyre-detachable bolt, the welding of the body part 20 of the thrust chamber and the jacket section of the spray pipe is completed, and the risk of pulling and cracking the welding seam on the inner wall of the jacket section of the spray pipe during hoisting can be eliminated.

The foregoing is merely an illustrative embodiment of the present application, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present application shall fall within the protection scope of the present application.

Claims

1. The utility model provides a be used for thrust room body portion welded compound frock which characterized in that includes: the clamping device comprises a mandrel assembly, a clamping sleeve tire, a pressure ring assembly and a pressing assembly;

the mandrel assembly, the sleeve clamping tire, the pressure ring assembly and the pressure applying assembly are used in a matched mode, the body of the thrust chamber and the inner wall of the spray pipe sleeve clamping section are clamped, and therefore butt welding of the body of the thrust chamber and the spray pipe sleeve clamping section is assisted;

the mandrel component comprises a central shaft, a mandrel nut and a large-end clamping steel sleeve; the jacket tire comprises a jacket tire I section and a jacket tire II section;

the sleeve clamping tire II section adopts a circular truncated cone structure, and the sleeve clamping tire I section is connected to the small-caliber end of the sleeve clamping tire II section;

one end of the central shaft sequentially penetrates through the sleeve clamping tire I section and the sleeve clamping tire II section along the length direction of the sleeve clamping tire, and is fixed at the large-caliber end of the sleeve clamping tire II section through the large-end clamping steel sleeve; the other end of the central shaft is fixedly connected with the pressure applying assembly through the mandrel nut;

the pressure applying assembly comprises a pressure applying upper plate, a pressure applying lower plate, an O-shaped rubber ring and a second adjusting bolt;

the second adjusting bolt is circumferentially arranged on the pressure applying upper plate and is used for matching with the pressure applying upper plate and the pressure applying lower plate to adjust the butt joint gap between the body of the thrust chamber and the welding seam of the spray pipe jacket section to a preset value;

the gas path and liquid path nozzle is arranged on the section I of the jacket tire and used for introducing a working medium required by welding into the section II of the jacket tire;

the compression ring assembly comprises a jacket outer compression ring, a compression ring bolt and a compression ring nut;

2. The composite tool for welding the body part of the thrust chamber according to claim 1, wherein the mandrel assembly is fixedly arranged on an inner central axis of the jacket tire along the length direction of the jacket tire, and the jacket tire is used for positioning the inner wall and the outer wall of the jacket section of the jet pipe;

3. The composite tool for the thrust chamber body part welding according to claim 2, wherein the jacket tire II section comprises an outer cylinder, an inner cylinder and a rib;

4. The welding process of the composite tool for the thrust chamber body part welding according to the claims 1 to 3, is characterized by comprising the following steps:

5. The welding process of the composite tool for the body part welding of the thrust chamber according to claim 4, wherein the process of clamping the body part of the thrust chamber and the inner wall of the nozzle pipe clamping section and butt-welding the body part of the thrust chamber and the nozzle pipe clamping section comprises the following steps:

clamping the inner wall of the jacket section of the spray pipe welded by the longitudinal rib welding seam on the second section of the jacket tire, and pressing the inner wall by an outer pressing ring of the jacket; the inner wall and the outer wall of the jacket section of the spray pipe are leveled and clamped through compression ring nuts and compression ring bolts which are distributed in the circumferential direction by matching with a height gauge;

passing through the preformed holes correspondingly arranged on the upper pressing plate and the lower pressing plate, introducing welding shielding gas into the section II of the jacket tire through the gas path and liquid path pipe nozzle, and performing circumferential weld welding on the body part of the thrust chamber and the inner wall of the sleeve section of the nozzle tube;

and stopping introducing the shielding gas, passing through the preformed holes correspondingly arranged on the upper pressing plate and the lower pressing plate, introducing welding cooling water into the II section of the jacket tire through the gas circuit and liquid circuit pipe nozzle, and performing circular welding on the outer wall overlapping ring of the sleeve section of the spray pipe clamp.