Composite flexible welding tool for aircraft duct and using method of composite flexible welding tool

Abstract

The embodiment of the invention discloses a composite flexible welding tool for aircraft conduits and a using method of the composite flexible welding tool, a platform part of a welding platform in the tool is arranged to be a hole platform, mounting holes with preset intervals are formed in the end face of the platform in the transverse direction and the longitudinal direction correspondingly, and the mounting holes are used for positioning and mounting various types of positioning assemblies; the positioning assemblies are locked through the quick positioning and locking shafts; the multiple groups of types of positioning assemblies comprise an end head positioning assembly, a guide pipe positioning assembly and a pipe clamp positioning assembly; the end positioning assembly is used for positioning a joint part which is in butt joint or lap welding with the guide pipe through a joint positioner; the catheter positioning assembly supports a catheter through a catheter positioner with the top arranged to be of a V-shaped structure so as to keep the spatial position of the catheter. The pipe clamp positioning assembly is assembled at the hoop position of the guide pipe in a holding mode through the pipe clamping device and used for keeping the space posture of the guide pipe.

Description

Technical Field

[0001] The present invention relates to the field of but not limited to the technical field of catheter positioning welding, and in particular to a composite flexible welding tool for aircraft catheters and a use method thereof. Background Art

[0002] There are basically three types of aircraft ducts: straight ducts, curved ducts in a plane, and curved ducts in three-dimensional space. Due to the different shapes of ducts and the diversity of duct diameters, there are usually many types and quantities of ducts in an aircraft.

[0003] Traditionally, the welding of aircraft ducts involves first manufacturing duct samples, then placing the welded samples on a welding platform for assembly of welding fixtures, and finally clamping the duct parts on the assembled welding fixtures for welding. Since one type of aircraft requires hundreds of aircraft ducts of different specifications, duct samples need to be manufactured for each specification of duct. With the continuous accumulation of aircraft models, the number of duct samples has reached thousands, and the storage and management of on-site ducts requires a lot of manpower and material resources. Summary of the invention

[0004] Purpose of the present invention: In order to solve the above technical problems, the embodiments of the present invention provide a composite flexible welding tool for aircraft ducts and a method of using the same, so as to solve the problem that the storage and management of on-site ducts require a lot of manpower and material resources due to the large number of duct specifications and corresponding duct samples in various types of aircraft.

[0005] The technical solution of the present invention: The embodiment of the present invention provides a composite flexible welding tool for aircraft ducts, comprising: a welding platform, and various types of positioning components formed by assembling different assembling components; wherein the assembling components include: a joint locator 7, an arm sleeve 8, a connecting support, a duct locator 10, a pipe clamp 11 and a quick positioning locking shaft 14;

[0006] The welding platform 1 is a basic component of the flexible welding tooling, and its platform part is set as a hole system platform. The platform end surface of the welding platform 1 is provided with mounting holes with preset spacing in the horizontal and vertical directions, respectively, for positioning and mounting various types of positioning components through its mounting holes; the quick positioning locking shaft 14 is used to position and lock each positioning component on the mounting hole of the welding platform 1;

[0007] The positioning components of different types are formed by assembling different assembling components, including: an end positioning component, a catheter positioning component and a pipe clamp positioning component;

[0008] The end positioning assembly at least comprises: a connection support for positioning and connecting with the welding platform 1, an arm sleeve 8 mounted on the slide groove of the connection support, and a joint positioner 7 inserted into the arm sleeve 8 through a connection shaft 16; the end positioning assembly is used to position the joint parts for butt welding or lap welding with the catheter through the joint positioner 7;

[0009] The catheter positioning assembly at least comprises: a connecting support for positioning and connecting with the welding platform 1, and a catheter positioner 10 installed on the slide groove of the connecting support; the catheter positioning assembly is used to support the catheter through the catheter positioner 10 with a V-shaped structure at the top to maintain the spatial position of the catheter;

[0010] The pipe clamp positioning assembly at least comprises: a connecting support for positioning and connecting with the welding platform 1, a pipe clamp 11 installed on the sliding groove of the connecting support, and the pipe clamp 11 is configured as an annular pipe clamp with a circular caliber formed by two semicircular pipe clamps arranged and installed oppositely; the pipe clamp positioning assembly is used to hold the clamp position assembled on the pipe through the pipe clamp 11 to maintain the spatial posture of the pipe;

[0011] The connecting support members in each positioning component include at least one of a connecting member 9 and a height supporting element 13; wherein, the connecting member 9 is configured as an L-shaped angle seat, which is positioned and installed on the welding platform 1 through its horizontal bottom plate, and is connected to the assembly elements at the corresponding positions in each positioning component through the slide grooves of its side plates; the height supporting element 13 is positioned and installed on the welding platform 1, or fixedly installed on the horizontal bottom plate of the connecting member 9, and is used to support the height of the positioning element in the positioning component in which it is located; the positioning elements include a joint locator 7, a catheter locator 10, and a tube clamp 11.

[0012] Optionally, in the composite flexible welding tool for aircraft duct as described above,

[0013] The connecting member 9 is used to position and connect the positioning assembly where it is located to the welding platform 1. The connecting member 9 is set to an L-shaped angle seat structure, including the following structures: a hole connecting member 18, a longitudinal groove connecting member 19, a transverse groove connecting member 20 and an angle connecting member 21;

[0014] The side plates of the connectors 9 of various structures are all set as slide groove structures, which are used to cooperate with the height support element 13, the support arm sleeve 8, the catheter positioner 10, the tube clamp 11, or the direction adapter plate 12; the connectors 9 of various structures are respectively positioned and connected to the welding platform 1 through their horizontal bottom plates, and are locked and connected by a quick positioning locking shaft 14;

[0015] There are two positioning holes on the horizontal bottom plate of the hole system connector 18, and the spacing between the two positioning holes is the same as the spacing between two adjacent mounting holes on the welding platform 1;

[0016] A waist-shaped groove is provided in the longitudinal direction on the horizontal bottom plate of the longitudinal groove connecting member 19, so as to adjust the longitudinal installation position of the longitudinal groove connecting member 19 through the waist-shaped groove;

[0017] A waist-shaped groove is provided on the upper side of the horizontal bottom plate of the transverse groove connecting member 20, so as to adjust the transverse installation position of the transverse groove connecting member 20 through the waist-shaped groove;

[0018] A circular hole and an arc-shaped groove are provided on the horizontal bottom plate of the angle connector 21 , so that the angle connector 21 can be rotated around the circular hole to both sides at a preset angle to adjust the installation angle of the angle connector 21 on the welding platform 1 .

[0019] Optionally, in the composite flexible welding tool for aircraft duct as described above,

[0020] The height support element 13 is used to support and adjust the height of various assembly elements, and cooperate with the installation and positioning of the conduit; the height support element 13 is set to a U-shaped structure, wherein the two side end surfaces forming the L shape are respectively provided with horizontal and vertical cross-arranged sliding groove structures for installing sliding type assembly elements, one side end surface is provided with a waist groove, and the other side end surface is provided with a double positioning hole structure, and the end surface with the waist groove and the end surface with the double positioning holes are both used to cooperate and connect with the installation hole of the welding platform 1;

[0021] The height support element 13 includes a hollow square support 30 and a hollow rectangular support 31 .

[0022] Optionally, in the composite flexible welding tool for aircraft duct as described above,

[0023] In the end positioning assembly, the joint positioner 7 includes a replaceable positioning pin 17 and a connecting shaft 16 vertically installed on one end surface thereof, and the support arm sleeve 8 includes a sleeve and a rectangular plate vertically arranged along the axial direction on the outer side of the sleeve and the sleeve wall to form a T-shaped structure, a waist-shaped groove is provided on the rectangular plate, and a scale is provided on the side end surface of the rectangular plate; the joint positioner 7 is sleeved in the sleeve of the support arm sleeve 8 through its connecting shaft 16, and the support arm sleeve 8 is installed in cooperation with the sliding groove of the connecting piece 9 or the height support element 13 through the waist-shaped groove of its rectangular plate;

[0024] The end positioning assembly is used to adjust and fix the position of the joint positioner 7 through the support arm sleeve 8, and to position the joint parts that are butt-jointed or overlap-welded with the catheter through the joint positioner 7.

[0025] Optionally, in the composite flexible welding tool for aircraft duct as described above,

[0026] In the catheter positioning assembly, a V-shaped block is arranged at one end of the catheter positioner 10, and a rectangular plate connected to the bottom of the V-shaped block is arranged at the other end, a waist-shaped hole is opened on the rectangular plate, and a scale is arranged on the side end surface of the rectangular plate; the catheter positioner 10 is installed in cooperation with the connecting member 9 or the slide groove of the height support element 13 through the waist-shaped hole of the rectangular plate;

[0027] The catheter positioner 10 comprises: at least one of a positioner 22 having a single-layer V-shaped block and a positioner 23 having a double-layer V-shaped block; the top of the V-shaped block at one end of the two positioners is set as a V-shaped groove; the catheter positioner 10 is used to support the catheter arranged in a three-dimensional space through its V-shaped block to maintain the spatial position of the catheter, and its V-shaped groove is used to achieve the positioning requirements of catheters with different diameters;

[0028] The catheter positioning assembly is used to adjust the height position of the V-block through the rectangular plate of the catheter positioner 10, and support the catheter arranged in the three-dimensional space through the V-block to maintain the spatial position of the catheter.

[0029] Optionally, in the composite flexible welding tool for aircraft duct as described above,

[0030] In the pipe clamp positioning assembly, the pipe clamp 11 includes: an upper semicircular pipe clamp 24, a lower semicircular pipe clamp 25 and a positioning pad 26; wherein the upper semicircular pipe clamp 24 and the lower semicircular pipe clamp 25 are configured as semicircular pipe clamps with the same diameter, the semicircular diameters of the upper semicircular pipe clamp 24 and the lower semicircular pipe clamp 25 are relatively arranged, and the same side ends are hinged by positioning pins to form a hinge structure, and the other ends of the two semicircular pipe clamps are locked by clamping nuts, and after locking, a ring-shaped pipe clamp with a circular diameter is formed; the bottom of the lower semicircular pipe clamp 25 has a rectangular plate vertically connected as an integral structure, a waist-shaped hole is opened on the rectangular plate, and a scale is provided on the side end surface of the rectangular plate;

[0031] The positioning pad 26 includes semicircular ring pieces of various thicknesses, the outer diameter of the semicircular ring piece matches the semicircular inner diameter of the upper and lower semicircular tube clamps, and the inner diameter of the semicircular ring piece matches the outer diameter of the catheter;

[0032] The tube clamp positioning assembly is used to hold the clamp sleeved on the conduit through the tube clamp 11 to maintain its spatial posture of holding the conduit, and the position of the tube clamp 11 is adjusted through the lower semicircular tube clamp 25.

[0033] Optionally, the composite flexible welding tool for aircraft duct as described above further includes: a tube pressing assembly 15; the tube pressing assembly 15 includes: an adapter plate 32, a connecting rod 33, a thin nut 34, a support rod 35, a long arm sleeve 36, a clamping screw 37, a V-shaped clamp 38 and a quick positioning locking shaft 14;

[0034] The adapter plate 32 is provided with a mounting hole and a countersunk hole, and the quick positioning locking shaft 14 positions and connects the adapter plate 32 to the welding platform 1 through the mounting hole; the connecting rod 33 is provided with an internal threaded hole, and its bottom end is connected to the countersunk hole position of the adapter plate 32 through a countersunk screw, and the bottom end of the support rod 35 is threadedly connected to the internal threaded hole of the connecting rod 33, located above the connecting rod 33, and locked by a thin nut 34;

[0035] One end of the long arm sleeve 36 is sleeved on the top of the support rod 35, so that the long arm sleeve 36 can slide up and down along the support rod 35 to adjust its height position. An internal threaded hole is provided in the other end of the long arm sleeve 36 for threaded connection with the clamping screw 37, and the bottom end of the clamping screw 37 is connected to a V-shaped pressure block 38. The height position of the V-shaped pressure block 38 is adjusted by the clamping screw 37, so that the catheter is pressed onto the catheter locator 10 by the V-shaped pressure block 38.

[0036] Optionally, in the composite flexible welding tooling for aircraft ducts as described above, the assembly elements further include: a direction adapter plate 12 used in various types of positioning components;

[0037] The direction adapter plate 12 includes at least one of the following: a direction movable adapter plate 27a, an L-shaped double-sided groove adapter plate 28, a straight double-sided groove adapter plate 29, and a plane movable adapter plate 27b;

[0038] The direction-movable adapter plate 27a is an L-shaped angle seat, and both side plates are rectangular plates, with waist-shaped holes on the rectangular plates, and a scale on the side end surface of the rectangular plates; one side rectangular plate is connected with the connecting member 9 or the slide groove of the height support element 13, and the other side rectangular plate is used in conjunction with the slide groove of the L-shaped double-sided groove adapter plate 28 or the straight double-sided groove adapter plate 29;

[0039] The L-shaped double-sided groove adapter plate 28 and the straight double-sided groove adapter plate 29 have slide groove structures arranged horizontally and vertically on both sides, and the slide grooves are used in conjunction with the rectangular plate of the direction-moving adapter plate 27a to convert the movement of the positioning element in one direction into the movement in another direction; wherein the positioning element is a joint positioner 7, a catheter positioner 10, or a tube clamp 11;

[0040] The plane movable adapter plate 27b includes a rectangular plate and a slide groove connecting plate located in the same plane, the rectangular plate is provided with a waist-shaped hole, and a scale is provided on the side end face of the rectangular plate; the rectangular plate is connected to the slide groove of the connecting member 9 or the height support element 13 through the rectangular plate, and is connected to the positioning element through the slide groove connecting plate, so as to adjust the position of the positioning element in the plane.

[0041] Optionally, in the composite flexible welding tool for aircraft duct as described above,

[0042] The welding platform 1 comprises: a base plate 2, a bushing 3, four legs 4, four lifting rings 5, and four footings 6; four legs 4 are respectively installed at the four corners of the bottom of the base plate 2, four lifting rings 5 ​​are correspondingly installed at the same height on the outside of each leg 4, and four footings 6 are correspondingly installed on the inside of each leg 4;

[0043] The base plate 2 is used as a platform for positioning and installing various positioning components. The platform end surface of the base plate 2 is provided with mounting holes with preset spacing in the horizontal and vertical directions, forming multiple rows of mounting holes in the horizontal direction and multiple columns of mounting holes in the vertical direction, and partition lines are respectively engraved on the midlines of adjacent rows and adjacent columns of the mounting holes. The horizontal side edges of the base plate 2 are respectively marked with the column numbers of the mounting holes, and the vertical side edges are respectively marked with the row numbers of the mounting holes, so that each mounting hole has a coordinate area represented by the row number and the column number, which is used for quickly positioning the positioning component to be installed;

[0044] A bushing 3 is installed in each of the mounting holes, and is used to adjust the hole distance deviation between the mounting holes within a preset threshold through the bushing 3.

[0045] The embodiment of the present invention further provides a method for using a composite flexible welding tool for an aircraft duct, wherein the composite flexible welding tool for an aircraft duct described in any one of the above items is used to flexibly assemble the aircraft duct, comprising:

[0046] Step 1, determining the coordinate positions of both end surfaces of the aircraft duct on the welding platform 1 according to the design drawing of the aircraft duct, and determining the coordinate positions where the aircraft duct needs to be supported or positioned;

[0047] Step 2, according to the coordinate positions determined in step 1, various types of positioning components are formed by assembling various assembling components, including: an end positioning component, a plurality of catheter positioning components, a plurality of pipe clamp positioning components and a plurality of pipe pressing components;

[0048] Step 3, according to the design drawing, find the coordinate area of ​​the installation position of each positioning component on the welding platform 1, and place it at the corresponding position, and then use the quick positioning locking shaft 14 to fix each positioning component to the welding platform 1;

[0049] Step 4: For the installed catheter positioning assembly, use the tube pressing assembly 15 to install it to the catheter position that needs to be pressed.

[0050] Beneficial effects of the present invention: The traditional welding assembly concept is that a physical duct sample must be available before the assembly components can be assembled based on the physical duct sample. If there is no physical duct sample, the installation position of the assembly components cannot be found. This results in the flexible welding platform for aircraft ducts being a separate hole system platform or a slot system platform, that is, there is no hole system slot system composite platform. In view of the problems existing in the traditional aircraft duct splicing platform and its assembly scheme, the embodiment of the present invention provides a composite flexible welding tool for aircraft ducts and a method of using the same. In the composite flexible welding tool, positioning components of various types and different structural forms can be freely combined according to the structural form and use function of the assembly components, including: end positioning components, duct positioning components and pipe clamp positioning components, wherein the welding platform 1 is a hole system platform, and the connector 9 of the splicing component and the height support component 13 have hole system connection and groove system connection structures, forming a platform with a hole system and groove system composite structure; for various types of positioning components, after the welding platform 1 finds the coordinate area of ​​its installation position and places it in the corresponding position, each positioning component can be fixedly connected to the welding platform 1 by using a quick positioning locking shaft 14. In addition, for the duct positioning component that has been installed, the pipe pressing component 15 can be further installed to the duct part that needs to be pressed, usually installed in the duct positioning component at the position directly above the duct positioner 10, that is, the flexible assembly work of the aircraft duct by the flexible welding tool is completed. The composite flexible welding tooling and the method of using the same provided by the embodiment of the present invention break through the traditional concept of welding assembly. By combining the hole system platform with the assembly components of the hole system and the slot system, it is ensured that the assembly components can be installed in place according to the theoretical design digital model. The composite flexible welding tooling provided by the embodiment of the present invention is based on the diversity and structural design of the positioning components in the assembly components, and the assembly components are combined and assembled. According to the three-dimensional digital model, the manufacturing and assembly of the welding tooling can be completed quickly and efficiently, which can meet the welding requirements of catheters of different diameters, directions, and structures. It can also reduce the number of special welding tooling, reduce the tooling cost, and improve the manufacturing efficiency of the welding tooling. Furthermore, the composite flexible welding tooling has high reconfigurability and flexibility, which meets the demand for reducing tooling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0052] Figure 1 A schematic structural diagram of a welding platform in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention;

[0053] Figure 2A schematic diagram of the structure of a terminal positioning assembly in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention, Figure 2 Figure a shows one assembly structure of the end positioning assembly, and Figure b shows another assembly structure of the end positioning assembly;

[0054] Figure 3 A schematic diagram of the structure of a duct positioning assembly in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention, Figure 3 Figure a shows one assembly structure of the catheter positioning component, and Figure b shows another assembly structure of the catheter positioning component;

[0055] Figure 4 The schematic diagram of the structure of the pipe clamp positioning assembly in the composite flexible welding tooling for aircraft ducts provided by the embodiment of the present invention is as follows: Figure 4 Figure a shows one assembly structure of the pipe clamp positioning assembly, and Figure b shows another assembly structure of the pipe clamp positioning assembly;

[0056] Figure 5 A schematic diagram of the structure of a connector in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention, Figure 5 Figures a, b, c and d in the figure respectively illustrate connecting members 9 of different structures;

[0057] Figure 6 A schematic diagram of the structure of a high-support component in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention, Figure 6 Figures a and b in the figure respectively illustrate different structures of the height support element 13;

[0058] Figure 7 for Figure 2 The schematic diagram of the structure of the joint locator and the support arm sleeve in the end positioning assembly provided by the embodiment shown, Figure 7 Figure a is the joint locator, and figure b is the support arm sleeve;

[0059] Figure 8 for Figure 3 The schematic diagram of the structure of the catheter positioner in the catheter positioning assembly provided in the embodiment shown, Figure 8 Figure a in the figure shows a positioner 22 with a single-layer V-shaped block, and Figure b shows a positioner 23 with a double-layer V-shaped block;

[0060] Fig. 9 A schematic structural diagram of a medium-pressure pipe assembly of a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention;

[0061] Fig.10 for Figure 4 A schematic diagram of the structure of a tube clamp in a catheter positioning assembly provided by the illustrated embodiment;

[0062] Fig.11 A schematic diagram of the structure of a directional adapter plate in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention, Fig.11 Figures a, b and c are adapter plates of different structural forms respectively;

[0063] Fig.12 A schematic diagram of an assembly structure for flexibly assembling an aircraft duct using the composite flexible welding tool for the aircraft duct provided by an embodiment of the present invention;

[0064] Fig.13 The diagram is a schematic diagram of another assembly structure for flexibly assembling aircraft ducts by using the composite flexible welding tool for aircraft ducts provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0066] As described in the above background technology, there are many types and quantities of ducts in aircraft structures, and the traditional welding method of aircraft ducts requires the formation of duct samples of ducts of various specifications. However, due to the large number of duct samples, the storage and management of ducts on site requires a lot of manpower and material resources.

[0067] With the development of CAD technology, it is now possible to establish physical digital models of all aircraft ducts in the CAD system according to actual conditions. Therefore, it is urgent to provide a universal flexible welding tool that can be assembled on-site with a combination fixture according to a three-dimensional digital model. Based on the above problems and needs, the embodiment of the present invention provides a composite flexible welding tool for aircraft ducts and a method of using the composite flexible welding tool. The composite flexible welding tool can ensure that the assembled components can be quickly and accurately installed in place during the assembly process, and can also be applied to the welding of various types of flexible ducts with different structures, diameters, shapes, and directions in aircraft.

[0068] The combination fixture can be used to quickly and efficiently manufacture and assemble welding tooling based on the three-dimensional digital model. It has high reconfigurability and flexibility, meeting the need to reduce tooling costs.

[0069] The present invention provides the following specific embodiments which can be combined with each other. The same or similar concepts or processes may not be described in detail in some embodiments.

[0070] Figure 1 The schematic diagram of the structure of the welding platform in the composite flexible welding tooling for aircraft ducts provided by the embodiment of the present invention. Figure 1 As shown, the structure of the composite flexible welding tooling for aircraft ducts provided in an embodiment of the present invention includes: a welding platform 1, and multiple types of positioning components formed by assembling different assembling components; the assembling components in the embodiment of the present invention include at least: a joint locator 7, an arm sleeve 8, a connecting support, a duct locator 10, a tube clamp 11, a direction adapter plate 12 and a quick positioning locking shaft 14, wherein the connecting support includes at least one of a connecting member 9 and a height support element 13.

[0071] The welding platform 1 in the embodiment of the present invention is a basic component of a flexible welding tool, and its platform part is set as a hole system platform. The welding platform 1 is a basic component of a flexible welding tool, and its platform part is set as a hole system platform. The end surface of the base plate 2 in the welding platform 1 is respectively provided with mounting holes with preset spacing in the horizontal and vertical directions, that is, the mounting holes are arranged in a matrix, which are used to position and install various types of positioning components through its mounting holes.

[0072] In the embodiment of the present invention, different assembling elements are assembled to form multiple types of positioning assemblies, including: an end positioning assembly, a catheter positioning assembly, and a pipe clamp positioning assembly. Figure 2 A schematic diagram of the structure of a terminal positioning assembly in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention, Figure 2 Figure a shows one assembly structure of the end positioning assembly, and Figure b shows another assembly structure of the end positioning assembly; Figure 3 A schematic diagram of the structure of a duct positioning assembly in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention, Figure 3 Figure a shows one assembly structure of the catheter positioning component, and Figure b shows another assembly structure of the catheter positioning component; Figure 4 The schematic diagram of the structure of the pipe clamp positioning assembly in the composite flexible welding tooling for aircraft ducts provided by the embodiment of the present invention is as follows: Figure 4 Figure a in the figure is an assembly structure of the pipe clamp positioning assembly, and Figure b is another assembly structure of the pipe clamp positioning assembly. In addition, the composite flexible welding tool provided in the embodiment of the present invention may also include: a pipe pressing assembly 15 used in conjunction with the catheter positioning assembly.

[0073] like Figure 2 The end positioning assembly formed by assembly as shown includes at least: a connecting support for positioning and connecting with the welding platform 1, an arm sleeve 8 installed on the connecting support slide groove, and a joint locator 7 inserted into the arm sleeve 8 through a connecting shaft 16; the end positioning assembly is used to locate the joint parts for butt welding or lap welding with the catheter through the joint locator 7.

[0074] like Figure 3The catheter positioning assembly shown is formed by assembly and includes at least: a connecting support for positioning and connecting with the welding platform 1, and a catheter positioner 10 installed on the connecting support slide groove; the catheter positioning assembly is used to support the catheter through the catheter positioner 10 with a V-shaped structure at the top to maintain the spatial position of the catheter.

[0075] like Figure 4 The pipe clamp positioning assembly formed by assembly as shown at least comprises: a connecting support for positioning and connecting with the welding platform 1, a pipe clamp 11 installed on the connecting support slide, wherein the pipe clamp 11 is configured as an annular pipe clamp with a circular caliber formed by two semicircular pipe clamps arranged and installed oppositely; the pipe clamp positioning assembly is used to hold the clamp position assembled on the conduit through the pipe clamp 11 to maintain the spatial posture of the conduit.

[0076] It should be noted that the connecting support members in each positioning component in the above-mentioned embodiments of the present invention include at least one of a connecting member 9 and a height supporting element 13; wherein, the connecting member 9 is configured as an L-shaped angle seat, which is positioned and installed on the welding platform 1 through its horizontal bottom plate, and is connected to the assembly elements at the corresponding positions in each positioning component through the slide grooves of its side plates; the height supporting element 13 is positioned and installed on the welding platform 1, or fixedly installed on the horizontal bottom plate of the connecting member 9, and is used to support the height of the positioning element in the positioning component in which it is located; the positioning elements include a joint locator 7, a catheter locator 10, and a tube clamp 11.

[0077] In the specific implementation of the embodiment of the present invention, the positioning components of various types and structures can be freely combined according to the structural form and use function of the assembled components, that is, including the terminal positioning component, the catheter positioning component and the pipe clamp positioning component in the above embodiment. For example, a terminal positioning component of a structural form composed of a joint positioner 7, a support arm sleeve 8 and a connector 9, such as Figure 2 Another example, the catheter positioning assembly composed of a connecting member 9 and a catheter positioner 10 in a structural form, such as Figure 3 Another example, the clamp 11, the direction adapter plate 12, the height support element 13 constitutes a structural form of the clamp positioning assembly, such as Figure 4 Figure a in the figure. For the various types of positioning components mentioned above, after the welding platform 1 finds the coordinate area of ​​its installation position and places it at the corresponding position, the quick positioning locking shaft 14 can be used to fix each positioning component to the welding platform 1. In addition, for the installed catheter positioning component, the tube pressing component 15 can be further used to install it to the catheter part that needs to be pressed, usually installed in the catheter positioning component at the position directly above the catheter positioner 10, that is, the flexible assembly work of the flexible welding tooling on the aircraft catheter is completed.

[0078] The connector 9 in the embodiment of the present invention is used to connect the assembly element with the welding platform 1, for example, it has a variety of structures, such as a hole connector 18, a longitudinal groove connector 19, a transverse groove connector 20 and an angle connector 21, and the above-mentioned various connectors 19 are all L-shaped angle seat structures; one end is a slide groove structure for use with the rectangular plates of different assembly elements, and is equipped with bolt holes for screw fixation; the other end is connected to the welding platform 1, and is locked and connected by using a quick positioning locking shaft 14. The quick positioning locking shaft 14 is a locking element, which can quickly position and lock the assembly element with the welding platform 1 to meet the requirements of simple and fast installation. The top of the catheter positioner 10 is set as a V-shaped block to support the position of the catheter in space, which can adapt to the positioning of catheters of different diameters. The tube clamp 11 can hold the clamp position of the assembled catheter, and the two semicircular tube clamps form a circular hinge mechanism to maintain the spatial posture of the catheter. The direction adapter plate 12 can convert the movement of the assembly element connected to it in one direction into movement in another direction, changing the adjustment position of the assembly element. The height support element 13 is used to support the height of the assembled components and coordinate the installation and positioning of the product. The tube pressing assembly 15 can press the conduit to the positioning element to ensure that the position of the conduit remains unchanged during the processing. By using the assembled components in conjunction with the welding platform 1, different welding tools can be assembled according to the structural forms of conduits with different diameters to meet the welding requirements of different conduit parts.

[0079] In one implementation of the embodiment of the present invention, a welding platform 1 is provided in the form of a structure such as Figure 1 As shown, the welding platform 1 includes: a base plate 2, a bushing 3, four legs 4, four lifting rings 5, and four anchors 6; four legs 4 are installed at the four corners of the bottom of the base plate 2, and four lifting rings 5 ​​are installed at the same height on the outer side of each leg 4, and four anchors 6 are installed on the inner side of each leg 4.

[0080] In this implementation, the base plate 2 is used as a platform for positioning and installing various positioning components. The platform end surface of the base plate 2 is provided with mounting holes with preset spacing in the horizontal and vertical directions, forming multiple rows of mounting holes in the horizontal direction and multiple columns of mounting holes in the vertical direction, and partition lines are respectively engraved on the midlines of adjacent rows and adjacent columns of the mounting holes. The horizontal sides of the base plate 2 are respectively marked with the column numbers of the mounting holes, and the vertical sides are respectively marked with the row numbers of the mounting holes, so that each mounting hole has a coordinate area represented by the row number and the column number, which is used to quickly locate the positioning component to be installed. In addition, a bushing 3 is installed in each of the mounting holes, which is used to adjust the hole spacing deviation between the mounting holes within the preset threshold through the bushing 3.

[0081] Furthermore, two rows of mounting holes are provided on the two lateral end surfaces of the base plate 2 along the height direction, and each row of mounting holes corresponds to the position of each row of mounting holes on the end surface of the platform. Two columns of mounting holes are provided on the two longitudinal end surfaces along the height direction, and each column of mounting holes corresponds to the position of each column of mounting holes on the end surface of the platform, which are used to expand the platform through the mounting holes on the side end surfaces, or to position and install the positioning components.

[0082] In one implementation of the embodiment of the present invention, various possible implementation structures of the connecting member 9 are provided, such as Figure 5 FIG. 1 is a schematic diagram of the structure of a connector in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention. Figure 5 Figures a, b, c and d in the figure respectively illustrate connecting members 9 of different structures.

[0083] The function of the connector 9 in the embodiment of the present invention is to position and connect the positioning assembly to the welding platform 1, and for example, it includes four structures, namely: a hole system connector 18 (such as Figure 5 Figure a), longitudinal groove connecting member 19 (such as Figure 5 b), transverse groove connecting member 20 (such as Figure 5 c) and angle connector 21 (as Figure 5 d in the figure); the connectors 9 of the above-mentioned various structures are all L-shaped angle seats. The side plates of the above-mentioned various connectors 9 are all set as slide groove structures for use with rectangular plates of different assembly elements, and are equipped with bolt holes for screw fixing; the bottom plate fits the welding platform 1, and the welding platform 1 and the connector 19 are locked and connected by a quick positioning locking shaft 14.

[0084] In a specific implementation, the side plate of the connector 9 configured as an L-shaped angle seat is provided with a slide groove of equal width 30H7 that is staggered horizontally and vertically, and is used in conjunction with a variety of assembly elements (such as a height support element 13, an arm sleeve 8, a catheter positioner 10, a tube clamp 11, or a direction adapter plate 12), and is fixed with screws through assembled bolt holes; the L-shaped angle seat is positioned and connected to the welding platform 1 through its base plate, and is locked with a quick positioning locking shaft 14.

[0085] In this implementation, two positioning holes are provided on the horizontal bottom plate of the hole system connector 18, and the spacing between the two positioning holes is the same as the spacing between two adjacent mounting holes on the welding platform 1, for example, the spacing between the two positioning holes is 50 mm; a waist-shaped groove is provided on the upper longitudinal portion of the horizontal bottom plate of the longitudinal groove system connector 19, and a waist-shaped groove is provided on the upper transverse portion of the horizontal bottom plate of the transverse groove system connector 20, and the longitudinal installation position of the longitudinal groove system connector 19 and the transverse installation position of the transverse groove system connector 20 can be adjusted accordingly through the waist-shaped groove; a circular hole and an arc-shaped groove are provided on the horizontal bottom plate of the angle connector 21, and the angle connector 21 can be rotated 45° to both sides around the circular hole to adjust the angle installation of the angle connector 21 on the welding platform 1; various connectors 9 of the L-shaped angle seat structure are used in conjunction with the mounting holes of the welding platform 1 through the positioning holes, waist-shaped grooves and arc-shaped grooves on the upper portions of their respective horizontal bottom plates.

[0086] In one implementation of the embodiment of the present invention, various possible implementation structures of the height support element 13 are provided, such as Figure 6 FIG. 1 is a schematic diagram of the structure of a high-support element in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention. Figure 6 Figures a and b in the figure respectively illustrate the height support elements 13 with different structures.

[0087] The height support element 13 in the embodiment of the present invention has the function of supporting and adjusting the height of different assembly elements and cooperating with the installation and positioning of the conduit; the height support element 13 can be used alone or in combination with the connector 9.

[0088] In this implementation, the height support element 13 includes a hollow square support 30 and a hollow rectangular support 31. Figure 6 Figure a shows a hollow square support 30, and Figure b shows a hollow rectangular support 31. The height support element 13 is a U-shaped structure, in which the two side end faces forming the L shape are respectively provided with horizontal and vertical cross-arranged slide groove structures, which can be used to install sliding assembly elements with rectangular plates (for example, the support arm sleeve 8, the catheter positioner 10, the pipe clamp 11, and the direction adapter plate 12 can be installed). One side end face is provided with a waist groove, and the other side end face is provided with a double positioning hole structure (that is, two positioning holes are provided). The end face with the waist groove and the end face with the double positioning holes can be connected with the mounting hole of the welding platform 1.

[0089] It should be noted that the connecting parts 9 or the height supporting elements 13 in each embodiment of the present invention are installed on the welding platform 1 through the quick positioning locking shaft 14; the quick positioning locking shaft 14 is a standard locking element, which squeezes the internal middle ball by tightening the screw, and pushes the middle ball to squeeze the three locking balls to achieve the purpose of quick locking. The outer diameter of the quick positioning locking shaft is a precision shaft, which can meet the purpose of quick positioning.

[0090] The following describes in detail the composition structures of various types of positioning components in the present invention through a plurality of different assembly combination implementation methods:

[0091] Implementation 1

[0092] like Figure 2 The end positioning assembly in Figure a includes: a joint positioner 7, a support arm sleeve 8 and a connecting piece 9; wherein the joint positioner 7 is used to position the joint parts that are butt-jointed or overlap-welded with the catheter. Figure 7 for Figure 2 The schematic diagram of the structure of the joint locator and the support arm sleeve in the end positioning assembly provided by the embodiment shown, Figure 7 Figure a is the joint locator, and figure b is the support arm sleeve.

[0093] The joint locator 7 in this implementation includes a connecting shaft 16 and a replaceable positioning pin 17, wherein the connecting shaft 16 is vertically mounted on one side end face of the replaceable positioning pin 17, and the support arm sleeve 8 includes a rectangular plate vertically arranged along the axial direction on the outer side of the sleeve and its wall, and a waist-shaped hole is provided on the rectangular plate; the joint locator 7 is sleeved in the sleeve of the support arm sleeve 8 through its connecting shaft 16, that is, the connection with the support arm sleeve 8 is realized, and the support arm sleeve 8 is assembled into the notch of the connector through the waist-shaped hole of its rectangular plate. In this end positioning assembly, the support arm sleeve 8 is used to fix the position of the joint locator 7, and is connected with the notch of the connector 9 through the rectangular plate of the support arm sleeve 8.

[0094] Reference Figure 2 and Figure 6 As shown in FIG. 1 , the replaceable positioning pin 17 is processed into matching specifications according to the shapes of catheter joints of different specifications, and is fixedly connected to the connecting shaft 16 by screws to meet the positioning requirements of different catheter joints.

[0095] Reference Figure 2 and Figure 6 As shown in b, the support arm sleeve 8 is a T-shaped structure, one end of which is set as a sleeve for being fitted and connected to the connecting shaft 16 of the joint locator, and the other end is set as a rectangular plate with a width of 30f7 for being connected to the sliding groove of the connecting support member. A scale is engraved on one side of the rectangular plate for adjusting the height position of the support arm sleeve 8.

[0096] Implementation 2

[0097] like Figure 3 The catheter positioning assembly in Figure a includes: a catheter positioner 10 and a connector 9. Figure 8 for Figure 3 The schematic diagram of the structure of the catheter positioner in the catheter positioning assembly provided in the embodiment shown, Figure 8Figure a in the figure shows a positioner 22 with a single layer of V-blocks, and Figure b shows a positioner 23 with a double layer of V-blocks.

[0098] In this implementation, reference Figure 3 and Figure 8 One end of the catheter positioner 10 is set as a V-shaped block, and the other end is set as a rectangular plate connected to the bottom of the V-shaped block. It is used to support the catheter arranged in a three-dimensional space through its V-shaped block to maintain the spatial position of the catheter. Its V-shaped structure can adapt to the positioning of catheters with different diameters.

[0099] like Figure 8 As shown, the catheter positioner 10 in this implementation includes, for example: a positioner 22 with a single-layer V-shaped block, and a positioner 23 with a double-layer V-shaped block. The difference between the above two positioners is that the upper end of the V-shaped block at one end of the catheter positioner 10 is set as a single-layer V-shaped structure or a double-layer V-shaped structure, and the upper end of the V-shaped block is a V-shaped groove, which is used to support the outer diameter of the catheter and can meet the positioning requirements of catheters of different diameters. The other end of the V-shaped block is a rectangular plate with a width of 30f7, which is used to cooperate with the slide groove of the connecting piece 9. A waist groove is opened in the middle of the rectangular plate for bolt compression, and a scale is engraved on one side of the rectangular plate for adjusting the height position of the V-shaped block.

[0100] Implementation 3

[0101] With respect to the catheter positioning assembly in the above-mentioned implementation manner 2, a pipe pressing assembly 15 for use therewith may also be provided in the composite flexible welding tool. Fig. 9 A schematic structural diagram of a medium-pressure pipe assembly of a composite flexible welding tool for an aircraft duct provided in an embodiment of the present invention.

[0102] The tube pressing assembly 15 in this implementation includes: an adapter plate 32, a connecting rod 33, a thin nut 34, a support rod 35, a long arm sleeve 36, a clamping screw 37, a V-shaped clamp 38 and a quick positioning locking shaft 14. Among them, the adapter plate 32 is provided with a mounting hole and a countersunk hole, and the quick positioning locking shaft 14 positions and connects the adapter plate 32 to the welding platform 1 through the mounting hole. The connecting rod 33 is provided with an internal threaded hole, and the bottom end of the connecting rod 33 is connected to the countersunk hole position of the adapter plate 32 by a countersunk screw, and the bottom end of the support rod 35 is threadedly connected above the connecting rod 33 and locked by a thin nut 34. One end of the long arm sleeve 36 is sleeved on the top of the support rod 35, so that the long arm sleeve 36 as a whole can slide up and down along the support rod 35 to adjust its height position. An internal threaded hole is provided in the other end of the long arm sleeve 36 for threaded connection with the clamping screw 37, and the bottom end of the clamping screw 37 is connected to a V-shaped pressure block 38.

[0103] In this implementation, the height position of the V-shaped pressing block 38 can be adjusted by the pressing screw 37, so that the V-shaped pressing block 38 is pressed on the corresponding position of the catheter.

[0104] It should be noted that, during the specific installation process, the tube pressing assembly 15 can be installed to the corresponding installation hole position of the welding platform 1 through the pre-designed installation coordinates. In addition, the tube pressing assembly 15 can be used to press the catheter onto the catheter positioner 10 to ensure that the position of the catheter remains unchanged during the processing.

[0105] Implementation 4

[0106] like Figure 4 The pipe clamp positioning assembly in Figure a includes: a pipe clamp 11, a height support element 13 and a direction adapter plate 12; Figure 4 The pipe clamp positioning assembly in Figure b includes: a pipe clamp 11 and a connecting piece 9. Fig.10 for Figure 4 The illustrated embodiment provides a schematic structural diagram of a tube clamp in a catheter positioning assembly.

[0107] The tube clamp 11 in this implementation includes: an upper semicircular tube clamp 24, a lower semicircular tube clamp 25, and a positioning pad 26. The upper semicircular tube clamp 24 and the lower semicircular tube clamp 25 are configured as semicircular tube clamps with the same diameter. The semicircular diameters of the upper semicircular tube clamp 24 and the lower semicircular tube clamp 25 are relatively arranged, and the same side ends are hinged by positioning pins to form a hinge structure. The other ends of the two semicircular tube clamps are locked by clamping nuts. After locking, an annular tube clamp with a circular diameter is formed, and the diameter of the circular diameter is fixed. The positioning pad 26 includes semicircular ring sheets of various thicknesses, whose outer diameters match the upper and lower semicircular tube clamps, and whose inner diameters match the outer diameters of the catheters. Different thicknesses are processed to meet the positioning requirements of catheters of different diameters.

[0108] In addition, the bottom of the lower semicircular tube clamp 25 has a rectangular plate vertically connected to form an integrated structure, for example, a rectangular plate with a width of 30f7, and a waist-shaped hole is opened on the rectangular plate for connecting with the connecting piece 9 or the slide groove of the height support element 13; and a scale is engraved on one end face of the rectangular plate for adjusting the position of the tube clamp 11.

[0109] In the pipe clamp positioning assembly provided in this implementation, the pipe clamp 11 can hold the clamp position of the assembled pipe to maintain its spatial posture of holding the pipe, and the position of the pipe clamp 11 can be adjusted by the lower semicircular pipe clamp 25.

[0110] Implementation 5

[0111] On the basis of the above-mentioned various implementations, the assembly element may further include: a direction adapter plate 12; the direction adapter plate 12 may be applied to the structures of the above-mentioned various positioning components. Fig.11FIG. 1 is a schematic diagram of the structure of a direction adapter plate in a composite flexible welding tool for an aircraft duct provided by an embodiment of the present invention. Fig.11 Figure a, Figure b and Figure c are adapter plates with different structural forms.

[0112] The direction adapter plate in this implementation may include at least one of the following structures: a direction-moving adapter plate 27a, an L-shaped double-sided groove adapter plate 28, a straight double-sided groove adapter plate 29, and a flat adapter plate 27b (such as Figure 3 (Fig. b).

[0113] like Fig.11 The direction-movable adapter plate 27a shown in Figure a is set as an L-shaped corner seat, and both side plates are rectangular plates with a width of 30f7. Each rectangular plate is provided with a waist-shaped hole, and each rectangular plate is marked with a scale; one side of the rectangular plate is connected to the sliding groove of the connecting piece 9 or the height support element 13, and the other side of the rectangular plate is used in conjunction with the sliding groove on one side end face of the L-shaped double-sided groove adapter plate 28 or the straight double-sided groove adapter plate 29.

[0114] like Fig.11 The L-shaped double-sided groove adapter plate 28 shown in Figure b and the straight-line double-sided groove adapter plate 29 shown in Figure c are provided with horizontal and vertical cross-arranged slide groove structures on both side end faces. The slide groove is used in conjunction with the rectangular plate on the other side of the direction-movable adapter plate 27a to convert the movement of a positioning element (such as a joint locator 7, or a catheter locator 10, or a tube clamp 11) in one direction into movement in another direction.

[0115] like Figure 3 In the catheter positioning assembly of Figure b, a plane-movable adapter plate 27b is used. The plane-movable adapter plate 27b includes a rectangular plate and a slide groove connecting plate located in the same plane. A waist-shaped hole is opened on the rectangular plate, and a scale is provided on the side end face of the rectangular plate. The rectangular plate is connected to the slide groove of the connecting piece 9 or the height support element 13, and is connected to the positioning element through the slide groove connecting plate, so as to adjust the position of the positioning element in the plane.

[0116] In this implementation 5, based on the structure of the positioning components of the above-mentioned implementations 1 to 4, by adding a direction adapter plate 12 in the positioning components of various types and structures, the movement of the positioning element in one direction can be converted into movement in another direction, or the position of the positioning element in the plane can be adjusted, that is, the purpose of changing the spatial position of the assembled elements is achieved.

[0117] Implementation 6

[0118] Based on the above various implementations, a specific structure of the welding platform 1 is provided, such as Figure 1As shown, the welding platform 1 includes a base plate 2, a bushing 3, four legs 4, four rings 5, and four feet 6. The base plate 2 is formed by butt welding of multiple steel plates (for example, 5 plates). The weld is polished after welding, and the surface of the platform is nitrided to prevent welding slag from damaging the working surface. The base plate 2 is provided with mounting holes with a spacing of 50 mm in the horizontal and vertical directions, and partition lines are drawn between adjacent mounting holes. The two sides of the horizontal mounting holes of the base plate 2 are marked with numbers 1 to 39, and the two sides of the mounting holes are marked with letters A to S. Each mounting hole corresponds to a coordinate area composed of letters and numbers, which is convenient for the rapid installation of the assembled components. In addition, the base plate 2 is provided with 6 reference holes, which are used to establish a detection coordinate system after the assembly components are installed. The bushing 3 is installed in the mounting hole of the base plate 2, and the hole spacing deviation between two adjacent mounting holes is kept within 0.02 mm. The bushing 3 is used to ensure the hole spacing deviation. The four legs 4 are of the same specifications, screwed to the base plate 2, and are welded from square tube profiles and steel plates. Wheels are installed at the bottom to meet the needs of platform mobility. Lifting rings 5 ​​are installed on the four legs for lifting welding tools. Four footings 6 are installed on the inner side of the legs 4 to ensure the stability of the platform.

[0119] The traditional welding assembly concept is that a physical catheter sample must be available before the assembly components can be assembled based on the physical catheter sample. If there is no physical catheter sample, the installation position of the assembly components cannot be found. This results in that the flexible welding platforms for aircraft catheters are all separate hole-type platforms or slot-type platforms, that is, there is no hole-system slot-system composite platform. In view of the problems existing in the traditional aircraft catheter splicing platform and its assembly scheme, the embodiment of the present invention provides a composite flexible welding tool for aircraft catheters and a method of use thereof. In the composite flexible welding tool, positioning components of various types and different structural forms can be freely combined according to the structural form and use function of the assembly components, including: end positioning components, catheter positioning components and pipe clamp positioning components, wherein the welding platform 1 is a hole-system platform, and the connector 9 of the splicing component and the height support component 13 have a hole-system connection and a slot-system connection structure, forming a platform with a hole-system slot-system composite structure; for various types of positioning components, after the welding platform 1 finds the coordinate area of ​​its installation position and is placed in the corresponding position, each positioning component can be fixedly connected to the welding platform 1 by a quick positioning locking shaft 14. In addition, for the installed catheter positioning assembly, the tube pressing assembly 15 can be further installed to the catheter part that needs to be pressed, usually installed in the catheter positioning assembly at the position directly above the catheter positioner 10, that is, the flexible assembly work of the flexible welding tool on the aircraft catheter is completed. The composite flexible welding tool and its use method provided by the embodiment of the present invention break through the traditional welding assembly concept, and by combining the hole system platform with the assembly elements of the hole system and the groove system, it is ensured that the assembly elements can be installed in place according to the theoretical design digital model; the composite flexible welding tool provided by the embodiment of the present invention is used, based on the diversity and structural design of the positioning elements in the assembly elements, and the assembly elements are combined and assembled in the form of combination, and the manufacturing and assembly of the welding tool can be completed quickly and efficiently according to the three-dimensional digital model, which can meet the welding requirements of catheters of different diameters, directions, and structures, and can also reduce the number of special welding tools, reduce tooling costs, and improve the manufacturing efficiency of welding tools. Furthermore, the composite flexible welding tool has high reconfigurability and flexibility, which meets the demand for reducing tooling costs.

[0120] Based on the composite flexible welding tool for aircraft ducts provided by the above embodiments of the present invention, the present invention also provides a method for using the composite flexible welding tool for aircraft ducts. The composite flexible welding tool for aircraft ducts provided by any of the above embodiments can be used to position and install the aircraft duct, including the following steps:

[0121] Step 1, determining the coordinate positions of both end surfaces of the aircraft duct on the welding platform 1 according to the aircraft duct model, and determining the coordinate positions where the aircraft duct needs to be supported or positioned;

[0122] Step 2, according to the coordinate positions determined in step 1, various types of positioning components are formed by assembling various assembling components, including: an end positioning component, a plurality of catheter positioning components, a plurality of pipe clamp positioning components and a plurality of pipe pressing components;

[0123] Step 3, according to the aircraft duct model, find the coordinate area of ​​the installation position of each positioning component on the welding platform 1, and place it at the corresponding position, and then use the quick positioning locking shaft 14 to fix each positioning component to the welding platform 1;

[0124] Step 4: For the installed catheter positioning assembly, use the tube pressing assembly 15 to install it to the catheter position that needs to be pressed.

[0125] like Fig.12 As shown, it is a schematic diagram of an assembly structure for flexibly assembling an aircraft duct using the composite flexible welding tool for the aircraft duct provided by an embodiment of the present invention; Fig.13 As shown, it is a schematic diagram of another assembly structure for flexibly assembling aircraft ducts using the composite flexible welding tool for aircraft ducts provided by an embodiment of the present invention. It can be seen that the composite flexible welding tool for aircraft ducts provided by the above-mentioned embodiments of the present invention can be assembled into different welding tools according to the structural forms of ducts of different diameters to meet the welding requirements of different duct parts; that is, the composite flexible welding tool can be applied to welding tools of flexible ducts of different diameters and shapes in aircraft, and the manufacturing and assembly of welding tools can be completed quickly and efficiently based on three-dimensional digital models by using assembling components for combined assembly. In addition, the composite flexible welding tool has high reconfigurability and flexibility, which meets the demand for reducing tooling costs.

[0126] The following provides an application method of a composite flexible welding tool for an aircraft duct during installation, including:

[0127] 1) First, according to the aircraft duct model, the assembly components used to form different positioning components are called, and the assembly and installation of various positioning components and the pressure tube assembly 15 are completed through the arrangement and combination of the assembly components with different functions;

[0128] 2) Secondly, various positioning components and pressure tube components 15 are quickly installed according to the aircraft duct model. The assembly sequence is to start from the end of one side of the duct and complete the fixed installation of each group of positioning components and pressure tube components 15 required on the duct path on the welding platform 1 in sequence according to the direction of the duct;

[0129] 3) Finally, use a three-coordinate measuring machine (or articulated arm) to select the three reference holes on the welding platform 1, establish a detection coordinate system, detect the surface or hole position of the positioning element, and check whether the combined fixture meets the manufacturing requirements of the welding fixture.

[0130] The assembly and installation methods of steps 1 and 2 above follow the following principles:

[0131] (a) Each group of positioning components and pipe pressing components 15 is assembled from bottom to top. First, the assembly components connected to the welding platform 1 are installed, including the connector 9 and the height support component 13. One of the two components can be selected according to the height of the catheter, and the connection is made by a quick positioning locking shaft; secondly, if the component includes a direction adapter plate or a support arm sleeve, the installation of the direction adapter plate and the support arm sleeve must be completed first. The installation of the direction adapter plate and the support arm sleeve with the connector and the height support component is achieved by matching the slide groove with the rectangular plate, and then locking the connection with the screw; finally, the installation of the positioning components is completed, including the joint locator, the catheter locator, and the tube clamp. The joint locator is used in conjunction with the support arm sleeve, and the connection is completed by matching the shaft hole and the pin positioning. The catheter locator and the tube clamp are connected to the connector, the height support component, or the direction adapter plate according to the needs by matching the rectangular plate with the slide groove.

[0132] (b) Since the connector 9 is divided into four structures, the connection between the connector 9 and the welding platform 1 is divided into two ways. For the hole connector, the positioning hole of the connector can be directly used to match the mounting hole of the welding platform to complete the quick installation of the connector. For the longitudinal groove connector, the transverse groove connector and the angle connector, the connector needs to be placed in the corresponding position according to the installation coordinates, and then the side of the connector is matched with the mounting hole of the nearby welding platform for installation. First, a positioning pin is inserted into the nearby mounting hole, and the distance between the side of the connector and the nearby mounting hole is measured through the model. The position of the connector is determined by using a standard gauge block, and then it is locked using a quick positioning locking shaft.

[0133] (c) When a rectangular plate and a slide groove are used as the connection method, it is necessary to measure the distance between the end face of the rectangular plate and the end face of the slide groove through a model, use a standard gauge block to determine the relative position of the two components, and then use screws to tighten them to complete the installation.

[0134] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A composite flexible welding tool for aircraft ducts, characterized in that: include: A welding platform, and various types of positioning components formed by assembling different assembly components; wherein the assembly components include: a joint locator (7), an arm sleeve (8), a connecting support, a catheter locator (10), a tube clamp (11) and a quick positioning locking shaft (14); The welding platform (1) is a basic component of the flexible welding tooling, and its platform part is configured as a hole system platform. The platform end surface of the welding platform (1) is provided with mounting holes with preset spacing in the transverse and longitudinal directions, respectively, for positioning and mounting various types of positioning components through the mounting holes; the quick positioning locking shaft (14) is used to position and lock each positioning component on the mounting hole of the welding platform (1); The positioning components of different types are assembled to form multiple groups, including: end positioning components, catheter positioning components and pipe clamp positioning components; The end positioning assembly at least comprises: a connection support member for positioning and connecting with the welding platform (1), an arm sleeve (8) mounted on a slide groove of the connection support member, and a joint positioner (7) inserted into the arm sleeve (8) via a connection shaft (16); the end positioning assembly is used to position a joint part for butt welding or lap welding with a catheter via the joint positioner (7); The catheter positioning assembly comprises at least: a connecting support member for positioning and connecting with the welding platform (1), and a catheter positioner (10) mounted on a slide groove of the connecting support member; the catheter positioning assembly is used to support the catheter through the catheter positioner (10) having a V-shaped structure at the top, so as to maintain the spatial position of the catheter; The pipe clamp positioning assembly at least comprises: a connecting support for positioning and connecting with the welding platform (1), a pipe clamp (11) installed on the sliding groove of the connecting support, wherein the pipe clamp (11) is configured as an annular pipe clamp with a circular caliber formed by two semicircular pipe clamps arranged oppositely and installed; the pipe clamp positioning assembly is used to hold the clamp position assembled on the pipe through the pipe clamp (11) to maintain the spatial posture of the pipe; The connecting support member in each positioning assembly includes at least one of a connecting member (9) and a height support element (13); wherein the connecting member (9) is configured as an L-shaped angle seat, is positioned and installed on the welding platform (1) through its horizontal bottom plate, and is connected to the assembly elements at the corresponding positions in each positioning assembly through the slide grooves of its side plates; the height support element (13) is positioned and installed on the welding platform (1), or is fixedly installed on the horizontal bottom plate of the connecting member (9), and is used to support the height of the positioning element in the positioning assembly in which it is located; the positioning element includes a joint positioner (7), a catheter positioner (10), and a tube clamp (11).

2. The composite flexible welding tool for aircraft ducts according to claim 1, characterized in that: The connecting piece (9) is used to position and connect the positioning assembly where it is located to the welding platform (1), and the connecting piece (9) is configured as an L-shaped angle seat structure, including the following structures: a hole connecting piece (18), a longitudinal groove connecting piece (19), a transverse groove connecting piece (20) and an angle connecting piece (21); The side plates of the connecting pieces (9) of various structures are all arranged as slide groove structures, which are used for matching and connecting with the height support element (13), the support arm sleeve (8), the catheter positioner (10), the tube clamp (11), or the direction adapter plate (12); the connecting pieces (9) of various structures are respectively positioned and connected to the welding platform (1) through their horizontal bottom plates, and are locked and connected by using a quick positioning locking shaft (14); Wherein, two positioning holes are provided on the horizontal bottom plate of the hole system connector (18), and the spacing between the two positioning holes is the same as the spacing between two adjacent mounting holes on the welding platform (1); A waist-shaped groove is longitudinally provided on the horizontal bottom plate of the longitudinal groove connecting member (19), so that the longitudinal installation position of the longitudinal groove connecting member (19) can be adjusted through the waist-shaped groove; A waist-shaped groove is provided in the horizontal upper portion of the horizontal bottom plate of the transverse groove connecting member (20) so as to adjust the transverse installation position of the transverse groove connecting member (20) through the waist-shaped groove; A circular hole and an arc-shaped groove are provided on the horizontal bottom plate of the angle connecting member (21), so that the angle connecting member (21) can be rotated around the circular hole to two sides at preset angles to adjust the installation angle of the angle connecting member (21) on the welding platform (1).

3. The composite flexible welding tool for aircraft ducts according to claim 1, characterized in that: The height support element (13) is used to support and adjust the height of various assembly elements, and cooperate with the installation and positioning of the catheter; the height support element (13) is set as a U-shaped structure, wherein the two side end surfaces forming the L shape are respectively provided with horizontal and vertical cross-arranged sliding groove structures for installing sliding type assembly elements, one side end surface is provided with a waist groove, and the other side end surface is provided with a double positioning hole structure, and the end surface with the waist groove and the end surface with the double positioning holes are both used for matching and connecting with the installation hole of the welding platform (1); Wherein, the height support element (13) includes a hollow square support (30) and a hollow rectangular support (31).

4. The composite flexible welding tool for aircraft ducts according to claim 1, characterized in that: In the end positioning assembly, the joint positioner (7) includes a replaceable positioning pin (17) and a connecting shaft (16) vertically installed on one end surface thereof, and the support arm sleeve (8) includes a sleeve and a rectangular plate vertically arranged along the axial direction on the outer side of the sleeve and the sleeve wall to form a T-shaped structure, a waist-shaped groove is opened on the rectangular plate, and a scale is provided on the side end surface of the rectangular plate; the joint positioner (7) is sleeved in the sleeve of the support arm sleeve (8) through its connecting shaft (16), and the support arm sleeve (8) is installed in cooperation with the sliding groove of the connecting piece (9) or the height support element (13) through the waist-shaped groove of its rectangular plate; The end positioning assembly is used to adjust and fix the position of the joint positioner (7) through the support arm sleeve (8), and to position the joint parts that are butt-welded or overlap-welded with the catheter through the joint positioner (7).

5. The composite flexible welding tool for aircraft ducts according to claim 1, characterized in that: In the catheter positioning assembly, a V-shaped block is arranged at one end of the catheter positioner (10), and a rectangular plate connected to the bottom of the V-shaped block is arranged at the other end, a waist-shaped hole is opened on the rectangular plate, and a scale is arranged on the side end surface of the rectangular plate; the catheter positioner (10) is installed in cooperation with the connecting piece (9) or the sliding groove of the height support element (13) through the waist-shaped hole of the rectangular plate; The catheter positioner (10) comprises: at least one of a positioner (22) having a single-layer V-shaped block and a positioner (23) having a double-layer V-shaped block; the top of the V-shaped block at one end of the two positioners is provided with a V-shaped groove; the catheter positioner (10) is used to support a catheter arranged in a three-dimensional space through its V-shaped block to maintain the spatial position of the catheter, and its V-shaped groove is used to achieve the positioning requirements for catheters of different diameters; The catheter positioning assembly is used to adjust the height position of the V-shaped block through the rectangular plate of the catheter positioner (10), and to support the catheter arranged in the three-dimensional space through the V-shaped block to maintain the spatial position of the catheter.

6. The composite flexible welding tool for aircraft ducts according to claim 1, characterized in that: In the pipe clamp positioning assembly, the pipe clamp (11) comprises: an upper semicircular pipe clamp (24), a lower semicircular pipe clamp (25) and a positioning pad (26); wherein the upper semicircular pipe clamp (24) and the lower semicircular pipe clamp (25) are arranged as semicircular pipe clamps with the same diameter, the semicircular diameters of the upper semicircular pipe clamp (24) and the lower semicircular pipe clamp (25) are arranged relatively, and the same side ends are hinged by positioning pins to form a hinge structure, and the other ends of the two semicircular pipe clamps are locked by clamping nuts, and after locking, a ring-shaped pipe clamp with a circular diameter is formed; the bottom of the lower semicircular pipe clamp (25) has a rectangular plate vertically connected to form an integrated structure, a waist-shaped hole is opened on the rectangular plate, and a scale is provided on the side end surface of the rectangular plate; The positioning pad (26) comprises semicircular ring pieces of various thicknesses, the outer diameter of the semicircular ring piece matches the semicircular inner diameter of the upper and lower semicircular tube clamps, and the inner diameter of the semicircular ring piece matches the outer diameter of the catheter; The tube clamp positioning assembly is used to hold the clamp sleeved on the catheter through the tube clamp (11) to maintain its spatial posture of holding the catheter, and to adjust the position of the tube clamp (11) through the lower semicircular tube clamp (25).

7. The composite flexible welding tool for aircraft ducts according to any one of claims 1 to 6, characterized in that: Also includes: A pipe pressing assembly (15); the pipe pressing assembly (15) comprises: an adapter plate (32), a connecting rod (33), a thin nut (34), a support rod (35), a long arm sleeve (36), a clamping screw (37), a V-shaped clamping block (38) and a quick positioning locking shaft (14); The adapter plate (32) is provided with a mounting hole and a countersunk hole, and the quick positioning locking shaft (14) positions and connects the adapter plate (32) to the welding platform (1) through the mounting hole; the connecting rod (33) is provided with an internal threaded hole, and its bottom end is connected to the countersunk hole position of the adapter plate (32) through a countersunk screw, and the bottom end of the support rod (35) is threadedly connected to the internal threaded hole of the connecting rod (33), located above the connecting rod (33), and locked by a thin nut (34); One end sleeve of the long support arm sleeve (36) is sleeved on the top end of the support rod (35), so that the long support arm sleeve (36) can slide up and down along the support rod (35) to adjust its height position. An internal threaded hole is provided in the other end sleeve of the long support arm sleeve (36) for threaded connection with a clamping screw (37), and a V-shaped pressure block (38) is connected to the bottom end of the clamping screw (37). The height position of the V-shaped pressure block (38) is adjusted by the clamping screw (37), so that the catheter is pressed onto the catheter positioner (10) by the V-shaped pressure block (38).

8. The composite flexible welding tool for aircraft ducts according to any one of claims 1 to 6, characterized in that: The assembly element also includes: a direction adapter plate (12) used in various types of positioning components; The direction transfer plate (12) comprises at least one of the following: a direction movable type transfer plate (27a), an L-shaped double-sided groove system transfer plate (28), a straight double-sided groove system transfer plate (29), and a plane movable type transfer plate (27b); The direction-movable adapter plate (27a) is an L-shaped angle seat, and both side plates are rectangular plates, waist-shaped holes are opened on the rectangular plates, and a scale is provided on the side end surface of the rectangular plate; one side rectangular plate is connected with the slide groove of the connecting member (9) or the height support element (13), and the other side rectangular plate is used in conjunction with the slide groove of the L-shaped double-sided groove adapter plate (28) or the straight double-sided groove adapter plate (29); The L-shaped double-sided groove adapter plate (28) and the straight double-sided groove adapter plate (29) have sliding groove structures arranged horizontally and vertically on both sides, and the sliding grooves are used in conjunction with the rectangular plate of the direction-moving adapter plate (27a) to convert the movement of the positioning element in one direction into the movement in another direction; wherein the positioning element is a joint positioner (7), a catheter positioner (10), or a tube clamp (11); The plane movable adapter plate (27b) comprises a rectangular plate and a slide groove connecting plate located in the same plane, the rectangular plate is provided with a waist-shaped hole, and a scale is provided on the side end surface of the rectangular plate; the rectangular plate is connected to the slide groove of the connecting member (9) or the height support element (13) through the matching connection, and is connected to the positioning element through the slide groove connecting plate, so as to adjust the position of the positioning element in the plane.

9. The composite flexible welding tool for aircraft ducts according to any one of claims 1 to 6, characterized in that: The welding platform (1) comprises: a base plate (2), a bushing (3), four legs (4), four lifting rings (5), and four footings (6); four legs (4) are respectively installed at the four corners of the bottom of the base plate (2); four lifting rings (5) are installed at the same height on the outer side of each leg (4); and four footings (6) are installed on the inner side of each leg (4); The base plate (2) serves as a platform for positioning and installing various positioning components. The platform end surface of the base plate (2) is provided with mounting holes with preset spacing in the horizontal direction and the vertical direction, forming multiple rows of mounting holes in the horizontal direction and multiple columns of mounting holes in the vertical direction, and partition lines are respectively engraved on the midlines of adjacent rows and columns of the mounting holes. The horizontal side edges of the base plate (2) are respectively marked with the column numbers of the mounting holes, and the vertical side edges are respectively marked with the row numbers of the mounting holes, so that each mounting hole has a coordinate area represented by the row number and the column number, which is used for quickly positioning the positioning component to be installed. A bushing (3) is installed in each of the mounting holes, and is used to adjust the hole spacing deviation between the mounting holes to be within a preset threshold through the bushing (3).

10. A method for using a composite flexible welding tool for aircraft ducts, characterized in that: The composite flexible welding tool for aircraft ducts according to any one of claims 1 to 9 is used to flexibly assemble aircraft ducts, comprising: Step 1, determining the coordinate positions of both end surfaces of the aircraft duct on the welding platform (1) according to the aircraft duct model, and determining the coordinate positions where the aircraft duct needs to be supported or positioned; Step 2, according to the coordinate positions determined in step 1, various types of positioning components are formed by assembling various assembling components, including: an end positioning component, a plurality of catheter positioning components, a plurality of pipe clamp positioning components and a plurality of pipe pressing components; Step 3, according to the design drawing, find the coordinate area of ​​the installation position of each positioning component on the welding platform (1), place them at the corresponding position, and use the quick positioning locking shaft (14) to fix each positioning component to the welding platform (1); Step 4: For the installed catheter positioning assembly, use the tube pressing assembly (15) to install it to the catheter position that needs to be pressed.

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