Welding fixture for titanium alloy half-tube part of aircraft

Abstract

The utility model discloses a welding fixture for an aircraft titanium alloy half-tube part. The welding fixture comprises a bottom plate; a left supporting block and a right supporting block are connected to the top of the bottom plate through screws, a first groove is formed in the top end of the right side wall of the left supporting block, a second groove is formed in the top end of the left side wall of the right supporting block, and a mold core is connected between the first groove and the second groove. An upper pressing plate connected with the left supporting block and the right supporting block through screws is arranged above the mold core, and protective gas channels which are transversely arranged are formed in the front side wall and the rear side wall of the mold core. The welding fixture for the titanium alloy half-pipe parts of the airplane is reasonable in structural design, the two half-pipe parts can be fixed on the outer wall of the mold core through the upper pressing plate, the upper pressing block and the middle supporting block, the parts can be effectively fixed, protective gas is introduced into the protective gas channel during welding, the protective gas can completely cover the reverse sides of welding seams of the parts, and the welding quality is improved. The purpose of protecting welding seams is achieved, and production requirements are met.

Description

Technical Field

[0001] The utility model relates to a welding fixture for titanium alloy half-tube parts of aircraft. Background Art

[0002] At present, a tubular titanium alloy part is used in aircraft structures. When making such a tubular titanium alloy part, two semi-tubular curved parts need to be welded together to form an irregular tubular structure. Titanium alloy parts will generate a lot of heat during the welding process, which is prone to quality problems such as oxidation and cracks. Therefore, argon protection is required during the welding process to meet the weld grade requirements. Therefore, a specific welding fixture is needed to fix and protect it to ensure the welding quality. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides a welding fixture for aircraft titanium alloy half-tube parts.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a welding fixture for aircraft titanium alloy half-tube parts, comprising:

[0005] Base plate;

[0006] It is characterized in that: a left support block and a right support block are connected to the top of the bottom plate by screws, a middle support block is provided between the left support block and the right support block, a first groove is provided at the top end of the right side wall of the left support block, a second groove is provided at the top end of the left side wall of the right support block, a mold core is connected between the first groove and the second groove, an upper pressure plate connected to the left support block and the right support block respectively by screws is provided above the mold core, an upper pressure block is provided between the upper pressure plate and the mold core, and transversely arranged protective gas channels are provided on the front and rear side walls of the mold core, and the two protective gas channels are connected by a straight hole.

[0007] In the above structure, the left end of the mold core is fixed inside the first groove by screws, and the right end of the mold core is fixed inside the second groove by screws.

[0008] In the above structure, a left baffle and a right baffle are fixed on the left and right sides of the mold core by means of bayonet pins, and an air inlet pipe and an air outlet pipe are provided on the right side wall of the right baffle. The air inlet pipe and the air outlet pipe are respectively connected to the two protective gas channels.

[0009] In the above structure, the upper pressing block and the upper pressing plate are fixed by screws.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the welding fixture structure of the aircraft titanium alloy half-tube parts of the utility model is reasonably designed, and the two half-tube parts can be fixed on the outer wall of the mold core through the upper pressure plate, the upper pressure block and the middle support block, which can effectively fix the parts and prevent the parts from deformation. During welding, protective gas is introduced into the protective gas channel, and the protective gas can completely cover the back side of the part weld, thereby achieving the purpose of protecting the weld and meeting production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a welding fixture for aircraft titanium alloy half-tube parts according to an embodiment of the utility model;

[0012] Figure 2 This is an exploded view of a welding fixture for an aircraft titanium alloy half-tube part according to an embodiment of the utility model;

[0013] Figure 3 It is a schematic diagram of the exploded structure of a mold core in a welding fixture for an aircraft titanium alloy half-tube part according to an embodiment of the utility model;

[0014] Figure 4 It is a reference diagram of the use state of a mold core in a welding fixture for an aircraft titanium alloy half-tube part described in an embodiment of the utility model.

[0015] In the figure:

[0016] 1. Bottom plate; 2. Left support block; 3. Right support block; 4. Middle support block; 5. First groove; 6. Second groove; 7. Mold core; 8. Upper pressure plate; 9. Upper pressure block; 10. Protective gas channel; 11. Straight hole; 12. Bayonet; 13. Left baffle; 14. Right baffle; 15. Inlet pipe; 16. Outlet pipe; 17. Semi-tubular parts. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] like Figure 1-3 As shown, a welding fixture for an aircraft titanium alloy half-tube part comprises:

[0019] Bottom plate 1;

[0020] It is characterized in that: a left support block 2 and a right support block 3 are connected to each other by screws at the top of the bottom plate 1, a middle support block 4 is arranged between the left support block 2 and the right support block 3, a first groove 5 is arranged at the top end of the right side wall of the left support block 2, a second groove 6 is arranged at the top end of the left side wall of the right support block 3, a core 7 is connected between the first groove 5 and the second groove 6, an upper pressure plate 8 connected to the left support block 2 and the right support block 3 respectively by screws is arranged above the core 7, an upper pressure block 9 is arranged between the upper pressure plate 8 and the core 7, and transversely arranged protective gas channels 10 are arranged on the front and rear side walls of the core 7, and the two protective gas channels 10 are connected by a straight hole 11.

[0021] In the above structure, the left end of the mold core 7 is fixed inside the first groove 5 by screws, and the right end of the mold core 7 is fixed inside the second groove 6 by screws.

[0022] In the above structure, a left baffle 13 and a right baffle 14 are respectively fixed on the left and right sides of the mold core 7 by a bayonet 12, and an air inlet pipe 15 and an air outlet pipe 16 are provided on the right side wall of the right baffle 14. The air inlet pipe 15 and the air outlet pipe 16 are respectively connected to the two protective gas channels 10.

[0023] In the above structure, the upper pressing block 9 and the upper pressing plate 8 are fixed by screws.

[0024] When the welding fixture of the aircraft titanium alloy half-tube parts of the utility model is used, other parts are installed in sequence (such as Figure 4 As shown in the figure, two semi-tubular parts 17 are placed on the outer wall of the mold core, the left baffle and the right baffle are installed and locked with a bayonet, and then the two ends of the mold core with the installed accessories are fixed between the first groove and the second groove by screws, and the upper pressure block is fixed to the bottom end surface of the upper pressure plate by screws, and then the installed upper pressure plate is fixed to the left support block and the right support block by screws. The upper pressure block presses the parts to prevent the parts from loosening; the protective gas enters the device from the air inlet pipe, and the protective gas can be sent into the protective gas channel and evenly distributed. The protective gas (argon) with a purity of 99.99% is connected for at least 20S, and the parameters are adjusted to make the protective gas fill the entire reverse side of the weld to form a stable protective gas field to achieve welding conditions and protect the weld.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A welding fixture for aircraft titanium alloy half-tube parts, comprising: Bottom plate (1); The invention is characterized in that: a left support block (2) and a right support block (3) are connected to the top of the bottom plate (1) by screws, a middle support block (4) is provided between the left support block (2) and the right support block (3), a first groove (5) is provided at the top of the right side wall of the left support block (2), a second groove (6) is provided at the top of the left side wall of the right support block (3), a mold core (7) is connected between the first groove (5) and the second groove (6), an upper pressure plate (8) connected to the left support block (2) and the right support block (3) by screws is provided above the mold core (7), an upper pressure block (9) is provided between the upper pressure plate (8) and the mold core (7), and a transversely arranged protective gas channel (10) is provided on the front and rear side walls of the mold core (7), and the two protective gas channels (10) are connected by a straight hole (11).

2. The welding fixture for aircraft titanium alloy half-tube parts according to claim 1 is characterized in that: The left end of the mold core (7) is fixed inside the first groove (5) by means of screws, and the right end of the mold core (7) is fixed inside the second groove (6) by means of screws.

3. The welding fixture for aircraft titanium alloy half-tube parts according to claim 1 is characterized in that: A left baffle (13) and a right baffle (14) are respectively fixed on the left and right sides of the mold core (7) by means of a bayonet (12); an air inlet pipe (15) and an air outlet pipe (16) are provided on the right side wall of the right baffle (14); the air inlet pipe (15) and the air outlet pipe (16) are respectively connected to the two protective gas channels (10).

4. The welding fixture for aircraft titanium alloy half-tube parts according to claim 1 is characterized in that: The upper pressing block (9) and the upper pressing plate (8) are fixed by screws.

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