An assembly welding device for an inner ring assembly of an engine

Abstract

An assembly and welding device for a convex mounting seat in an engine inner ring assembly, comprising a chassis, a supporting ring, a steel positioning ring, a copper positioning ring, a guide column, a compression disc cover and a shoulder nut, the inner walls of the steel positioning ring and the copper positioning ring are both annular funnel-shaped, and the funnel-shaped mounting surface formed after the steel positioning ring and the copper positioning ring are connected and installed is adapted to the shape of the outer wall of the engine inner ring assembly to be processed. Compared with the traditional tooling, the limiting device provided by the application uses an inner surface to limit the sheet metal inner ring, two annular compression blocks with different diameters are used to compress and automatically align the axial and circumferential positions of the sheet metal inner ring, the clamping and positioning are accurate, fast, stable, convenient and quick; after assembly and welding, the concentricity of the two ends of the sheet metal inner ring and the mounting seat is good, at the same time, the use of the application shortens the processing cycle, avoids the occurrence of situations such as pressure injury and deformation in the process of large-scale correction and processing of parts, reduces the repair of parts, and greatly improves the processing efficiency of the parts.

Description

Technical Field

[0001] This invention belongs to the field of assembly and welding processing, and specifically relates to an assembly and welding device for an inner protruding mounting seat of an engine inner ring assembly. Background Technology

[0002] Currently, in the production of aero-engine components, large-diameter sheet metal forming parts suffer from significant surface errors and deformation. Numerous inwardly protruding mounting seats need to be assembled and welded onto these parts, resulting in a large welding workload, significant welding deformation, and substantial post-processing correction work. This part number significantly impacts the processing schedule. When welding mounting seats to these parts, issues arise such as significant deformation of the mounting seats towards the inner ring of the sheet metal, polygonal shapes appearing on the inner ring, and severe end-face warping, affecting subsequent machining and engine assembly. Because there are no dedicated tooling fixtures for this assembly and welding, the design space for limiting devices is extremely limited, making design very difficult. Welding in a free state leads to significant deformation of the mounting seats after welding, resulting in polygonal shapes and further increasing the heavy correction workload in subsequent machining. There is an urgent need to independently design and manufacture an assembly and welding limiting device to restrict the assembly of components during welding, control welding deformation, and ensure the proper mounting seat position. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides an assembly and welding device for an inner protruding mounting seat of an engine inner ring assembly and a method for using the same. It independently designs and manufactures an assembly and welding limiting device for an inwardly protruding mounting seat. During assembly and welding, the limiting device is used to limit the assembly parts to control the welding deformation of the parts and ensure the assembly position of the mounting seat.

[0004] The present invention is achieved through the following technical solutions.

[0005] This invention provides an assembly and welding device for an inner protruding mounting seat of an engine inner ring assembly, comprising a chassis, a support ring, a steel positioning ring, a copper positioning ring, a guide post, a clamping plate, and a pressure cap. The chassis is placed at the bottom, the steel positioning ring is fixedly mounted on the chassis, and the copper positioning ring is mounted on the steel positioning ring. The inner walls of both the steel and copper positioning rings are annular funnel-shaped, and the funnel-shaped mounting surface formed by the connection and installation of the steel and copper positioning rings is adapted to the shape of the outer wall of the engine inner ring assembly to be processed. The support ring is mounted on the chassis. Between the disc and the steel positioning ring, its inner diameter is smaller than the bottom inner diameter of the steel positioning ring, and its outer diameter is larger than the bottom inner diameter of the steel positioning ring. After the engine inner ring assembly to be processed is installed, it rests on the support ring. The clamping disc is disc-shaped, and its outer wall is adapted to the inner wall of the engine inner ring assembly to be processed. It has a through hole in its middle. The bottom of the chassis also has a corresponding through hole. During installation, the guide post passes through the through hole at the bottom of the chassis and the clamping disc and connects with the shoulder nut to press the engine inner ring assembly to be processed onto the copper positioning ring and the steel positioning ring.

[0006] Furthermore, it also includes a positioning pin. The outer wall of the copper positioning ring has a through hole. During installation, the positioning pin passes through the through hole in the outer wall of the copper positioning ring and is inserted into the inner ring assembly of the engine to be processed for positioning.

[0007] Furthermore, it also includes a pressure cap, which is annular, with an inner diameter smaller than the top inner diameter of the copper positioning ring and an outer diameter larger than the top inner diameter of the copper positioning ring. During installation, the pressure cap is fixedly installed on the top of the copper positioning ring, and the engine inner ring assembly to be processed is pressed against the inside of the copper positioning ring. Furthermore, it also includes a connecting plate and a movable handle. One end of the connecting plate is connected to the end of the positioning pin located outside the copper positioning ring, and the other end has a longitudinal through hole. The movable handle is inserted into the longitudinal through hole of the connecting plate.

[0008] Furthermore, it also includes a positioning bushing, which is installed at the through hole of the clamping plate, and the guide post passes through the positioning bushing and is connected to the shoulder nut.

[0009] Furthermore, it also includes a rotating washer and a stepped screw. The rotating washer is placed in the through hole of the clamping plate, and the shouldered nut and the clamping plate clamp the rotating washer therein. The stepped screw passes through the side of the rotating washer to fix the rotating washer to the clamping plate.

[0010] Furthermore, the chassis is uniformly and fixedly arranged with multiple lifting bolts along its outer side.

[0011] Furthermore, it also includes an air plug, an air nozzle, a small positioning pin, a pin, and a support. The support is fixedly installed inside the chassis and passes through the pressure cap perpendicular to the pressure cap. The upper end of the support has a through hole along the transverse direction, and the pin is placed in the through hole. The air plug is installed on the copper positioning ring. The air nozzle passes through the air plug and enters the inner cavity of the copper positioning ring, and is connected to the pin through the small positioning pin.

[0012] Furthermore, a cylindrical pin is inserted between the steel positioning ring and the chassis for positioning.

[0013] Furthermore, it also includes a guide sleeve, which is placed at the through hole on the outer wall of the copper positioning ring, and the positioning pin passes through the guide sleeve and enters the copper positioning ring.

[0014] The beneficial effects of this invention are as follows: Compared with traditional tooling, the limiting device provided by this invention has a unique structure. It uses an inner face to limit the sheet metal inner ring, and two annular pressure blocks of different diameters press and automatically align the axial and circumferential positions of the sheet metal inner ring. The clamping and positioning are accurate, fast, and stable, and disassembly is convenient and quick. After assembly and welding, the concentricity of both ends of the sheet metal inner ring and the mounting base is good, the deformation is small, the amount of correction work is small, the condition of the parts before machining is good, the machining dimensions and positions of the mounting base meet the requirements, and it is not easy to cut the main body of the sheet metal inner ring. The part processing qualification rate is increased to 100%. At the same time, using this invention shortens the processing cycle, avoids the occurrence of crushing and deformation during the large-scale correction process of the parts, reduces the rework of parts, and shortens the processing cycle from the original 72 hours to the current 15 hours. The amount of correction work is greatly reduced, and the processing efficiency of the parts is greatly improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a top view of the device of the present invention;

[0017] Figure 3 This is a side view of the device of the present invention;

[0018] Figure 4 This is the device of the present invention. Figure 3 AA direction view in the middle;

[0019] In the diagram: 1-Chassis; 2-Support ring; 3-Steel positioning ring; 4-Copper positioning ring; 5-Guide post; 6-Pressure plate; 7-Air plug; 8-Air nozzle; 9-Pressure cap; 10-Small positioning pin; 11-Pin; 12-Support; 13-Connecting plate; 14-Positioning pin; 15-Guide sleeve; 17-Cylindrical pin; 18-Rotating washer; 19-Step screw; 20-Positioning bushing; 21-Screw; 22-Shoulder nut; 38-Moving handle; 39-Lifting bolt. Detailed Implementation

[0020] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0021] like Figure 1As shown, an assembly and welding device for an inner protruding mounting seat of an engine inner ring assembly includes a chassis 1, a support ring 2, a steel positioning ring 3, a copper positioning ring 4, a guide post 5, a clamping plate 6, and a pressure cap 9. The chassis 1 is placed at the bottom. A cylindrical pin 17 is inserted between the steel positioning ring 3 and the chassis 1 for positioning. The steel positioning ring 3 is fixedly installed on the chassis 1. The copper positioning ring 4 is installed on the steel positioning ring 3. The inner walls of both the steel positioning ring 3 and the copper positioning ring 4 are annular funnel-shaped. The funnel-shaped mounting surface formed by the connection and installation of the steel positioning ring 3 and the copper positioning ring 4 corresponds to the shape of the outer wall of the engine inner ring assembly to be processed. The support ring 2 is installed between the chassis and the steel positioning ring. Its inner diameter is smaller than the bottom inner diameter of the steel positioning ring, and its outer diameter is larger than the bottom inner diameter of the steel positioning ring. After the engine inner ring assembly to be processed is installed, it rests on the support ring 2. The clamping plate 6 is disc-shaped, and its outer wall is adapted to the inner wall of the engine inner ring assembly to be processed. It has a through hole in its middle. The bottom of the chassis 1 also has a corresponding through hole. During installation, the guide post 5 passes through the through hole at the bottom of the chassis 1 and the clamping plate 6 and connects with the shoulder nut 22 to press the engine inner ring assembly to be processed onto the copper positioning ring 4 and the steel positioning ring 3.

[0022] It also includes a positioning pin 14. The outer wall of the copper positioning ring 4 is provided with a through hole. During installation, the positioning pin 14 passes through the through hole provided in the outer wall of the copper positioning ring 4 and is inserted into the inner ring assembly of the engine to be processed for positioning.

[0023] It also includes a pressure cap 9, which is ring-shaped. Its inner diameter is smaller than the top inner diameter of the copper positioning ring 4, and its outer diameter is larger than the top inner diameter of the copper positioning ring 4. During installation, the pressure cap 9 is fixedly installed on the top of the copper positioning ring 4, and the engine inner ring assembly to be processed is pushed into the copper positioning ring 4.

[0024] It also includes a connecting plate 13 and a movable handle 38. One end of the connecting plate 13 is connected to the end of the positioning pin 14 located outside the copper positioning ring 4, and the other end is provided with a longitudinal through hole. The movable handle 38 is inserted into the longitudinal through hole provided in the connecting plate 13.

[0025] It also includes a positioning bushing 20, which is installed in the through hole of the pressure plate 6. The guide post 5 passes through the positioning bushing 20 and is connected to the shoulder nut 22. It also includes a rotating washer 18 and a stepped screw 19. The rotating washer 18 is placed in the through hole of the pressure plate 6, and the shoulder nut 22 and the pressure plate 6 clamp the rotating washer 18 therein. The stepped screw 19 passes through the side of the rotating washer 18 and fixes the rotating washer 18 to the pressure plate 6. A plurality of lifting bolts 39 are evenly fixed along the outer side of the chassis 1.

[0026] It also includes an air plug 7, an air nozzle 8, a small positioning pin 10, a pin 11, and a support 12. The support 12 is fixedly installed in the chassis 1 and passes through the pressure cover 6 perpendicularly to the pressure cover 6. The upper end of the support 12 has a through hole along the horizontal direction, and the pin 11 is placed in the through hole. The air plug 7 is installed on the copper positioning ring 4. The air nozzle 8 passes through the air plug 7 and enters the inner cavity of the copper positioning ring 4, and is connected to the pin 11 through the small positioning pin 10.

[0027] It also includes a guide sleeve 15, which is placed at the through hole on the outer wall of the copper positioning ring 4. The positioning pin 14 passes through the guide sleeve 15 and enters the copper positioning ring 4. The assembly part is chamfered to facilitate assembly, based on the actual sheet metal inner ring profile and the position requirements of the mounting base. The assembly details are shown in the attached figure. Figure 1 , 2 As shown. From Figure 3-4 It is known that the sheet metal inner ring M has irregular holes and several inwardly protruding mounting seats N. The height of the sheet metal inner ring M is H0, the height of the center position of the mounting seat is H1, and the angles between two adjacent mounting seats and the center of the irregular hole in the circumferential direction are L0 and L1, respectively. The mounting seats N and the sheet metal inner ring M are connected by argon arc welding. The main function of the device is to limit the sheet metal inner ring in the axial and circumferential directions, and to use a clamping plate and a pressure cover to press and round the sheet metal inner ring, keeping the sheet metal inner ring in an ideal profile position. The middle pin fixes the position of the mounting seats. At the same time, a venting groove is opened on the copper positioning ring at the assembly gap of the mounting seats to prepare for the welding process of the mounting seats, and also to prevent assembly errors. During clamping, first insert the annular sheet metal part M into the bottom of the fixture along the inner surfaces of the copper positioning ring 4 and the steel positioning ring 3 until it fits against the support ring 2. Then, adjust the circumferential position of the sheet metal inner ring M by rotating the movable handle 38, causing the positioning pin 14 to move along the guide sleeve 15 towards the center of the fixture, ensuring that the positioning pin is fully inserted into the irregular hole of the sheet metal inner ring, thereby determining the circumferential position of the sheet metal inner ring on the fixture. Next, insert the clamping plate 6 into the bottom center of the fixture along the guide post 5 and the positioning bushing 20, and use the rotating washer 18 to hold the guide post 5 in place. Then, install the shoulder nut 22 onto the guide post 5 and rotate the shoulder nut 22. Apply the shoulder nut until the clamping plate 6 is tightened and the sheet metal inner ring M is rounded. Then, use the small locating pin 10 on the pin 11 to fix the center of the mounting seat N hole. Push the pin 11 to ensure that the mounting seat N matches the bottom hole on the sheet metal inner ring M, ensuring consistency on the surface. Tighten the fixing screw 30. Check that each square bottom hole on the sheet metal inner ring M has a mounting seat N to mate with it. At the same time, check that the back ventilation at the joint is normal before proceeding with subsequent work. Then, use the pressure cap to limit the large end outlet of the sheet metal inner ring M, tighten and round it to ensure that the part is in the ideal surface state. Finally, perform argon arc welding on the butt weld of each mounting seat N and the sheet metal inner ring M from the inside. After welding, wait for it to cool to room temperature before removing the part from the fixture.

Claims

1. An assembly and welding device for an inner protruding mounting seat of an engine inner ring assembly, characterized in that: Includes chassis, support ring, steel positioning ring, copper positioning ring, guide post, clamping plate, pressure cap, and shouldered nut. The chassis is placed at the bottom, the steel positioning ring is fixedly installed on the chassis, and the copper positioning ring is installed on the steel positioning ring. The inner walls of both the steel positioning ring and the copper positioning ring are annular funnel-shaped. The funnel-shaped mounting surface formed by the connection and installation of the steel positioning ring and the copper positioning ring is adapted to the shape of the outer wall of the engine inner ring assembly to be processed. The support ring is installed between the chassis and the steel positioning ring. Its inner diameter is smaller than the bottom inner diameter of the steel positioning ring, and its outer diameter is larger than the bottom inner diameter of the steel positioning ring. The engine inner ring assembly to be processed is installed and rests on the support ring. The clamping plate is disc-shaped, and its outer wall is adapted to the inner wall of the engine inner ring assembly to be processed. It has a through hole in its middle, and the bottom of the chassis also has a corresponding through hole. During installation, the guide post passes through the through hole at the bottom of the chassis and the clamping plate and connects to the shoulder nut to press the engine inner ring assembly to be processed onto the copper positioning ring and the steel positioning ring. It also includes a positioning pin. The outer wall of the copper positioning ring is provided with a through hole. During installation, the positioning pin passes through the through hole provided in the outer wall of the copper positioning ring and is inserted into the inner ring assembly of the engine to be processed for positioning. It also includes a pressure cap, which is ring-shaped. Its inner diameter is smaller than the top inner diameter of the copper positioning ring, and its outer diameter is larger than the top inner diameter of the copper positioning ring. During installation, the pressure cap is fixedly installed on the top of the copper positioning ring, and the engine inner ring assembly to be processed is pushed into the copper positioning ring. It also includes a positioning bushing, which is installed at the through hole of the pressure plate, and the guide post passes through the positioning bushing and is connected to the shoulder nut; It also includes a rotating washer and a stepped screw. The rotating washer is placed in the through hole of the clamping plate, and the shouldered nut and the clamping plate clamp the rotating washer therein. The stepped screw passes through the side of the rotating washer and fixes the rotating washer to the clamping plate. It also includes an air plug, an air nozzle, a small positioning pin, a pin, and a support. The support is fixedly installed in the chassis and passes through the pressure cap perpendicular to the pressure cap. The upper end of the support has a through hole along the horizontal direction, and the pin is placed in the through hole. The air plug is installed on the copper positioning ring. The air nozzle passes through the air plug and enters the inner cavity of the copper positioning ring, and is connected to the pin through the small positioning pin. A cylindrical pin is inserted between the steel positioning ring and the chassis for positioning.

2. The assembly and welding device for the inner protruding mounting seat of the engine inner ring assembly as described in claim 1, characterized in that: It also includes a connecting plate and a movable handle. One end of the connecting plate is connected to the end of the positioning pin located outside the copper positioning ring, and the other end is provided with a longitudinal through hole. The movable handle is inserted into the longitudinal through hole provided in the connecting plate.

3. The assembly and welding device for the inner protruding mounting seat of the engine inner ring assembly as described in claim 1, characterized in that: The chassis has multiple lifting bolts evenly fixed along its outer side.

4. The assembly and welding device for the inner protruding mounting seat of the engine inner ring assembly as described in claim 1, characterized in that: It also includes a guide sleeve, which is placed at the through hole on the outer wall of the copper positioning ring, and the positioning pin passes through the guide sleeve and enters the copper positioning ring.

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