Titanium alloy thin-walled strut fixing case welding deformation control clamp and control method

Abstract

The application discloses a titanium alloy thin-wall strut fixed machine case welding deformation control clamp and a control method, which mainly comprises a base plate, a hook-shaped pressing plate, a seat, a taper shaft, a mandrel, a top plate, a hook-shaped bolt, an air hose, a positioning bushing and a nut, etc. The first stop opening on the base plate and the second stop opening on the top plate are used for positioning the large-diameter end mounting edge and the small-diameter end mounting edge of the strut fixed machine case, so as to ensure the radial dimension of the strut fixed machine case. The hook-shaped pressing plate is used for pressing the large-diameter end mounting edge of the strut fixed machine case, the hook-shaped bolt is used for pressing the small-diameter end mounting edge of the strut fixed machine case, and the base plate, the seat and the top plate are used for limiting the axial dimension of the strut fixed machine case, so as to ensure the size precision of the strut fixed machine case after welding. The application reduces the influence of welding on the deformation of the thin-wall part of the strut fixed machine case, improves the quality of the strut fixed machine case, improves the machining efficiency and reduces the production cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding, and particularly relates to a titanium alloy thin-wall strut fixed casing welding deformation control clamp and a control method. BACKGROUND

[0002] The strut fixed casing is an important core component of a turbine supporting casing in an aero-engine, is in a high-temperature and high-pressure complex environment, and bears a large amount of mechanical and aerodynamic loads. Figure 1 As shown in the figure, the strut fixed casing is largely made of thin-wall titanium alloy material and is made by argon arc welding. The thin-wall titanium alloy strut fixed casing is prone to deformation in the welding process, which makes it difficult to control the welding size, and the size precision of the strut fixed casing cannot be effectively guaranteed. Therefore, it is necessary to design a titanium alloy thin-wall strut fixed casing welding deformation control clamp to control the welding deformation. SUMMARY

[0003] The application aims to provide a titanium alloy thin-wall strut fixed casing welding deformation control clamp and a control method, reduce the influence of welding on the deformation of the thin-wall part of the strut fixed casing, improve the quality of the strut fixed casing, improve the processing efficiency, and reduce the production cost.

[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0005] The titanium alloy thin-wall strut fixed casing welding deformation control clamp comprises,

[0006] A bottom disc, a first stop opening matched with the outer circle of the mounting edge of the large outer diameter end of the strut fixed casing is arranged on the upper end surface of the bottom disc;

[0007] Hook-shaped pressing plates, the hook-shaped pressing plates are installed on the upper end surface of the bottom disc, and a plurality of hook-shaped pressing plates are uniformly distributed on the same circumference of the upper end surface of the bottom disc;

[0008] A mandrel, the mandrel is installed on the upper end surface of the bottom disc, an air inlet pipe is arranged in the mandrel and extends from the top of the mandrel to the circumferential surface of the mandrel, the air inlet end of the air inlet pipe is located at the top of the mandrel, and the air outlet end of the air inlet pipe is located at the circumferential surface of the mandrel;

[0009] A seat, the seat is installed on the upper end surface of the bottom disc and is coaxial with the mandrel, a ventilation groove is formed in the surface of the seat, and a ventilation pipe is arranged in the seat, the air outlet end of the ventilation pipe is in communication with the ventilation groove, and the air inlet end of the ventilation pipe is located at the top of the seat;

[0010] A tapered shaft, the tapered shaft is installed on the bottom disc and is coaxial with the seat and located on the outer side of the seat, the circumferential outer surface of the tapered shaft is a tapered surface, a ventilation hole is formed in the tapered shaft and penetrates through the circumferential inner surface and the circumferential outer surface of the tapered shaft, and the ventilation hole is in communication with the air outlet end of the ventilation pipe of the seat;

[0011] A top disc is connected to the mandrel and located above the seat and the taper shaft, and the lower end surface of the top disc is provided with a second stop opening matched with the outer circle of the small outer diameter end mounting edge of the strut fixing cartridge;

[0012] Hook-shaped bolts are mounted on the top disc, and the hook-shaped bolts are uniformly distributed on the same circumference of the lower end surface of the top disc;

[0013] An air pressure rubber tube is connected to the air inlet end of the top air duct of the seat and the air outlet end of the air inlet duct in the mandrel.

[0014] Further, the mandrel is threadedly connected to the top disc, and the mandrel is a stepped shaft, wherein one stepped surface forms a positioning surface of the mandrel and the top disc.

[0015] Further, the mandrel presses the top disc on the positioning surface of the mandrel through a positioning bushing, an enlarged washer, and a third nut.

[0016] Further, the circumferential outer edge surface of the top disc is provided with a handle.

[0017] Further, the materials of the bottom disc, the hook-shaped pressing plate, the seat, the mandrel, the top disc, and the hook-shaped bolts are 45 steel, and the material of the taper shaft is H62 brass.

[0018] A titanium alloy thin-walled strut fixing cartridge welding deformation control method adopts the aforementioned deformation control fixture, and comprises the following steps:

[0019] The first stop opening on the bottom disc and the second stop opening on the top disc jointly position the large outer diameter end mounting edge and the small outer diameter end mounting edge of the strut fixing cartridge, so as to ensure the radial dimension of the strut fixing cartridge;

[0020] The hook-shaped pressing plate presses the large outer diameter end mounting edge of the strut fixing cartridge, the hook-shaped bolt presses the small outer diameter end mounting edge of the strut fixing cartridge, and the bottom disc, the seat, and the top disc jointly limit the axial dimension of the strut fixing cartridge, so as to ensure the size precision of the strut fixing cartridge after welding.

[0021] A titanium alloy thin-walled strut fixing cartridge welding deformation control method adopts the aforementioned deformation control fixture, and comprises the following steps:

[0022] Step one: the top disc is removed from the mandrel, then the strut fixing cartridge is placed into the bottom disc, ensuring that the large outer diameter end mounting edge enters the first stop opening, then the top disc is mounted into the mandrel, ensuring that the small outer diameter end mounting edge of the strut fixing cartridge enters the second stop opening, the third nut is tightened, and then the hook-shaped pressing plate and the hook-shaped bolt are pressed respectively;

[0023] Step two: protective gas is introduced into the air inlet end of the air inlet duct at the top of the mandrel, and the protective gas is blown into the inner cavity of the strut fixing cartridge through the air vent holes on the surface of the taper shaft until the air in the inner cavity of the strut fixing cartridge is exhausted.

[0024] Step three, welding is implemented to the strut fixed machine case.

[0025] Compared with the prior art, the welding deformation control clamp and the control method have the following advantages:

[0026] (1) Simple operation: only need to tighten the hook-shaped bolt on the top disc, the hook-shaped pressing plate on the bottom disc, the nut on the top of the mandrel, the strut fixed machine case size control constraint can be completed, and then the welding deformation of the thin-walled part is controlled.

[0027] (2) Improve the welding quality and processing efficiency: by using the clamp control, the deformation of the strut fixed machine case is reduced, and the welding quality of the strut fixed machine case is improved; the welding back gas protection device is provided, the welding can be carried out in the atmospheric environment, the use of vacuum box is avoided, the welding processing efficiency is improved, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a strut fixed machine case sectional view;

[0029] Figure 2 It is a welding deformation control clamp sectional view;

[0030] In the figure: 1. bottom disc; 2. hook-shaped pressing plate; 3. seat; 4. tapered shaft; 5. sealing gasket; 6. first connector; 7. mandrel; 8. top disc; 9. hook-shaped bolt; 10. washer; 11. second connector; 12. air hose; 13. first nut; 14. stud; 15. first screw; 16. second screw; 17. first cylindrical pin; 18. second cylindrical pin; 19. stop pin; 20. handle; 21. washer; 22. second nut; 23. positioning bushing; 24. enlarged washer; 25. third nut. DETAILED DESCRIPTION

[0031] The application will be further described below in combination with the drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the application is limited to the following embodiments. Any modifications, replacements and changes made according to the ordinary technical knowledge and conventional means in the art without departing from the above technical idea of the application are included in the scope of the application.

[0032] Referring to Figure 2 , the titanium alloy thin-walled strut fixed machine case welding deformation control clamp mainly comprises a bottom disc 1, a hook-shaped pressing plate 2, a seat 3, a tapered shaft 4, a mandrel 7, a top disc 8, a hook-shaped bolt 9, an air hose 12, a positioning bushing 23 and a third nut 25.

[0033] The lower end of the mandrel 7 is fixed to the base 1 by the second screw 16. In use, the mandrel 7 passes through the center of the strut fixing machine case and is fixed to the top plate 8 through the positioning bushing 23, the enlarged washer 24 and the third nut 25.

[0034] The seat 3 is connected to the base 1 by the first cylindrical pin 17. The upper part of the seat 3 is provided with the first connector 6. The first connector 6 is connected to the third connector on the circumferential surface of the mandrel 7 through the air hose 12. The third connector is inserted into the exhaust end of the air duct of the mandrel 7. The lower part of the seat 3 is provided with a vent groove which is connected to the vent hole on the taper shaft 4 and constitutes the argon protection pipeline of the welding seam to ensure the welding seam quality of the strut fixing machine case.

[0035] The top plate 8 and the base 1 are respectively machined with the stopper corresponding to the two different outer diameter installation edges of the strut fixing machine case. The two different outer diameter installation edges of the strut fixing machine case are positioned together to ensure the radial size of the strut fixing machine case.

[0036] The plurality of hook-shaped pressing plates 2 are evenly distributed on a circumference of the base 1 through the first nut 13 and the stud 14. Similarly, the hook-shaped bolts 9 are evenly distributed on a circumference of the top plate 8 through the washer 21, the stop pin 19 and the second nut 22. The base 1, the seat 3, the top plate 8 and the taper shaft 4 jointly limit the axial size of the strut fixing machine case to ensure the size precision of the strut fixing machine case after welding. The outer taper surface of the taper shaft 4 is used to match the inner surface of the strut fixing machine case.

[0037] The materials of the base 1, the hook-shaped pressing plate 2, the seat 3, the mandrel 7, the top plate 8 and the hook-shaped bolt 9 are 45 steel. The material of the taper shaft 4 is H62 brass.

[0038] The sealing gasket 5 is used in cooperation with the first connector 6 to ensure that there is no leakage of the protective gas at the connection. The second connector 11 is inserted into the upper end of the mandrel 7 and is used to connect the external protective gas source. The air hose 12 connects the protective gas in the mandrel 7 and the seat 3. The second cylindrical pin 18 is used to install the taper shaft 4. The handle 20 is installed on the outer edge of the top plate 8 to facilitate the operation of the top plate 8.

[0039] The specific operation steps of the deformation control clamp are as follows:

[0040] 1. Press the strut fixing machine case: The strut fixing machine case is first put into the deformation control clamp to ensure that the installation edge of the strut fixing machine case is tightly fitted into the stopper of the base 1 and the top plate 8. Then, the hook-shaped pressing plate 2 on the base 1 and the hook-shaped bolt 9 on the top plate 8 are tightened. Next, the third nut 25 at the upper end of the mandrel 7 is tightened to press and fix the entire strut fixing machine case.

[0041] 2. Argon protection: the second connecting nozzle 11 on the upper end of the mandrel 7 is connected with the external pipeline and then argon gas is input. The argon gas is input from the welding seam back by the air pressure rubber tube 12, and after the air in the inner cavity of the support fixed machine case is discharged, the welding is performed again.

[0042] 3. Construction welding: the welding seam is welded, and after the support fixed machine case is cooled to room temperature, the support fixed machine case is disassembled.

[0043] The contents not described in detail in the specification of the present application belong to the prior art known to the person skilled in the art. Although the present application is described in the specific embodiments, so that the person skilled in the art can understand the present application, it should be clear that the present application is not limited to the scope of the specific embodiments, and for the person skilled in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the claims, these changes are obvious, and all the inventions and creations utilizing the concept of the present application are within the protection scope of the present application.

Claims

1. A titanium alloy thin-walled strut stationary fixture for welding distortion control, characterized in that: The utility model relates to a kind of variable control clamps, including, The upper end surface of chassis (1) is provided with the first stopper that matches with the outer circle of the large-diameter end mounting edge of strut fixing machine case; Hook-shaped pressing plate (2) is installed on the upper end surface of chassis (1), and a plurality of hook-shaped pressing plates (2) are uniformly distributed on the same circumference of the upper end surface of chassis (1); Spindle (7) is installed on the upper end surface of chassis (1), and the air inlet pipe is arranged in the spindle (7) and extends from the top to the circumferential surface, the air inlet end of the air inlet pipe is located at the top of the spindle (7), and the air outlet end of the air inlet pipe is located at the circumferential surface of the spindle (7); Seat (3) is installed on the upper end surface of chassis (1) and coaxial with spindle (7), and the surface of seat (3) is provided with a vent groove, and the inside of seat (3) is provided with a vent pipe, the air outlet end of the vent pipe is communicated with the vent groove, and the air inlet end of the vent pipe is located at the top of seat (3); Taper shaft (4) is installed on the chassis (1) and coaxial with the seat (3) and located outside the seat (3), the circumferential outer surface of taper shaft (4) is a tapered surface, and the vent hole is formed in the taper shaft (4) and penetrates the circumferential inner surface and the circumferential outer surface, and the vent hole is communicated with the air outlet end of the vent pipe of the seat (3); Top disc (8) is connected to the spindle (7) and located above the seat (3) and the taper shaft (4), and the lower end surface of the top disc (8) is provided with the second stopper that matches with the small-diameter end mounting edge outer circle of strut fixing machine case; Hook-shaped bolt (9) is installed on the top disc (8), and a plurality of hook-shaped bolts (9) are uniformly distributed on the same circumference of the lower end surface of the top disc (8); Air pressure rubber tube (12) is connected to the air inlet end of the vent pipe at the top of the seat (3) and the air outlet end of the air inlet pipe in the spindle (7) respectively; The first stopper on the chassis (1) and the second stopper on the top disc (8) are used to position the large-diameter end mounting edge and the small-diameter end mounting edge of the strut fixing machine case, so as to ensure the radial dimension of the strut fixing machine case; The hook-shaped pressing plate (2) is used to press the large-diameter end mounting edge of the strut fixing machine case, the hook-shaped bolt (9) is used to press the small-diameter end mounting edge of the strut fixing machine case, and the chassis (1), the seat (3) and the top disc (8) are used to limit the axial dimension of the strut fixing machine case, so as to ensure the size precision of the strut fixing machine case after welding.

2. The titanium alloy thin-walled strut fixture welding distortion control fixture of claim 1, wherein: The spindle (7) is threadedly connected with the top disc (8), and the spindle (7) is a stepped shaft, and one of the stepped surfaces forms a positioning surface of the spindle (7) and the top disc (8).

3. The titanium alloy thin-walled strut fixture welding distortion control fixture of claim 2, wherein: The spindle (7) is used to press the top disc (8) on the positioning surface of the spindle (7) through the positioning bushing (23), the enlarged washer (24) and the third nut (25).

4. The titanium alloy thin-walled strut fixture welding distortion control fixture of claim 1, wherein: The circumferential outer edge surface of the top disc (8) is provided with a handle (20).

5. The titanium alloy thin-walled strut fixture welding distortion control fixture of claim 1, wherein: The materials of the chassis (1), the hook-shaped pressing plate (2), the seat (3), the spindle (7), the top disc (8) and the hook-shaped bolt (9) are 45 steel, and the material of the taper shaft (4) is H62 brass.

6. A method for controlling welding distortion of a titanium alloy thin-walled strut stationary frame, characterized in that: The variable control clamp of claim 3 is used, and the method comprises the following steps: Step one, remove the top plate (8) from the mandrel (7), then put the strut fixing machine case into the bottom plate (1), make sure the large outer diameter end of the installation edge into the first stop, then put the top plate (8) into the mandrel (7), make sure the small outer diameter end of the strut fixing machine case into the second stop, tighten the third nut (25), then press the hook-shaped pressing plate (2) and the hook-shaped bolt (9) respectively; Step two, put the protective gas into the air inlet end of the air inlet pipe from the top of the mandrel (7), blow the protective gas into the inner cavity of the strut fixing machine case through the air hole on the surface of the taper shaft (4) until the air in the inner cavity of the strut fixing machine case is exhausted; Step three, weld the strut fixing machine case.

Images