Gas turbine diffuser front disc and thickened ring welding tool and welding method

Abstract

The invention discloses a gas turbine diffuser front disc and thickening ring welding tool and welding method. The gas turbine diffuser front disc and thickening ring are stacked on the tool chassis, and the coaxiality is ensured by positioning the tool pressure ring. The diffuser front disc bottom plate and the inner edge of the thickening ring are pressed by the tool pressure ring, the tool chassis, the locking pressure ring bolts, and the adjusting bolts, so as to enhance the structural rigidity of the welding part and limit the thermal deformation of the diffuser front disc welding area; in addition, the spacing between the diffuser front disc bottom plate and the tool chassis is adjusted by the adjusting bolts, so as to change the pressing force of the diffuser front disc and the thickening ring. The gas turbine diffuser front disc and thickening ring welding tool has a simple structure, convenient installation, and flexible operation. It can not only prevent the separation of the welding surface of the diffuser front disc and the thickening ring, but also effectively reduce the local thermal deformation of the diffuser front disc caused by uneven temperature distribution during welding, ensure the welding depth, and avoid cracks.

Description

Technical Field

[0001] The invention relates to gas turbine technology, in particular to a welding tool and a welding method for a front disc and a thickened ring of a gas turbine diffuser. Background Art

[0002] A gas turbine is a rotary power machine that uses a continuously flowing gas as a working fluid and converts the heat energy of the working fluid into mechanical work. It is the highest-end product in the field of energy and power equipment and represents the highest level of science and technology. Small gas turbines have a wider range of applications and greater demand. They are core equipment in the fields of distributed energy supply, natural gas power generation, industrial drive, military power supply, upgraded power and vehicle and ship power. They are of great significance to improving energy efficiency, reducing pollutant emissions, and improving the level of weapons and equipment and combat capabilities. The high temperature, high pressure and high stress working environment of the gas turbine requires extremely high control of thermal deformation. The intake diffuser of the gas turbine can effectively control the flow direction of the airflow to reduce the flow loss along the way, thereby improving the working efficiency of the compressor. In the manufacturing process of the diffuser, due to the complex structure, welding is usually used to weld and assemble the machined parts, including the welding assembly of the diffuser front disc and the thickened ring. The strength and processing accuracy of the diffuser front disc structure determine the fit clearance between the stator and rotor of the gas turbine in the cold state, and more seriously affect the working safety of the rotor and the efficiency of the gas turbine in the hot state. Therefore, it is very important to reduce the thermal deformation during welding of the diffuser front disc and the thickening ring to ensure the fit dimensional accuracy.

[0003] Since the thickness of the diffuser front disc and the thickening ring is relatively small, and in order to ensure the strength of the gas turbine under working conditions, the welding is required to reach a certain depth of penetration, the strength requirements and thermal deformation requirements are contradictory, and the diffuser front disc is very thin, and the welding deformation is extremely large without the support of the tooling. Therefore, it is necessary to design a tooling that can reduce the deformation of the diffuser front disc during the welding process. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a welding tool for the front disc and the thickened ring of a gas turbine diffuser, which has a simple structure, is easy to install, and is flexible to operate. It can not only prevent the welding surface of the front disc of the diffuser from being separated from the thickened ring, but also effectively reduce the local thermal deformation of the front disc of the diffuser caused by uneven temperature distribution during welding, thereby ensuring the welding penetration and avoiding the generation of cracks.

[0005] In order to solve the above technical problems, the present invention provides a gas turbine diffuser front disc and thickening ring welding tool, the diffuser front disc 10 bottom plate 11 is annular, and a circle of mounting holes is evenly formed along the axis of the bottom plate 11, the inner diameter of the thickening ring 50 is consistent with the inner diameter of the diffuser front disc 10 bottom plate 11; the welding tool includes a tool chassis 20, a tool pressure ring 40, an adjusting bolt 34, a locking pressure ring bolt 33 and a chassis bolt 35;

[0006] The tooling pressure ring 40 is an angular circular ring, and an outward radial lug 42 is formed on the upper end of its main body 41. The outer diameter of the main body 41 is between 0.99r and r, where r is the inner diameter of the bottom plate 11 of the diffuser front disc 10. The main body 41 is evenly formed with a circle of vertical pressure ring through holes 412;

[0007] The tooling chassis 20 is in the shape of a circular plate, and the outer diameter of the tooling chassis 20 is smaller than R and larger than (R+r) / 2, where R is the outer diameter of the bottom plate 11 of the diffuser front disc 10;

[0008] Corresponding to the circle of mounting holes on the bottom plate 11 of the diffuser front disc 10, the tooling chassis 20 is formed with a circle of pre-tightening through holes around its axis;

[0009] Corresponding to the circle of pressing ring through holes 412 of the tooling pressing ring 40, the tooling chassis 20 is formed with a circle of chassis locking holes around its axis;

[0010] The tooling chassis 20 is also formed with a circle of adjusting screw holes around its axis, and the circle of adjusting screw holes is between the circle of pre-tightening through holes and the circle of chassis locking holes;

[0011] The adjusting bolt 34 is used to pass through the adjusting screw hole of the tooling chassis 20 from bottom to top, and the upper end abuts against the lower side of the bottom plate 11 of the diffuser front disc 10. By rotating the adjusting bolt 34, the distance between the bottom plate 11 of the diffuser front disc 10 and the tooling chassis 20 can be adjusted;

[0012] The locking pressure ring bolt 33 is used to pass through the pressure ring through hole 412 of the tooling pressure ring 40 from top to bottom and enter the corresponding chassis locking hole of the tooling chassis 20, and lock the diffuser front plate 10 and the inner edge of the thickening ring 50 coaxially placed on the tooling chassis 20 from bottom to top between the lug 42 of the tooling pressure ring 40 and the upper end of the adjusting bolt 34;

[0013] The chassis bolts 35 are used to pass through the pre-tightening through holes of the tooling chassis 20 from bottom to top and enter the mounting holes of the bottom plate 11 of the diffuser front disc 10 to pre-tighten and fix the diffuser front disc 10 to the tooling chassis 20 .

[0014] Preferably, the gas turbine diffuser front disk and thickened ring welding tool further includes a tool positioning column 30;

[0015] The upper end of the tooling positioning column 30 is used for installation and fixation connection to the center of the lower side of the tooling chassis 20, and the lower end is used for connection to the motor output shaft.

[0016] Preferably, the tooling positioning column 30 is evenly formed with a circle of central bolt through holes 37 around the axis;

[0017] The upper end of the tooling positioning column 30 is axially symmetrically formed with two positioning blind holes 36;

[0018] Corresponding to the circle of central bolt through holes 37 of the tooling positioning column 30, the tooling chassis 20 is formed with a circle of positioning screw holes around its axis;

[0019] Corresponding to the two blind positioning holes 36 of the tooling positioning column 30, two positioning pin holes are axially symmetrically formed on the lower side of the tooling chassis 20;

[0020] The tooling positioning column 30 is positioned with the tooling chassis 20 by inserting the upper ends of the two positioning pins 32 into the corresponding positioning pin holes and the lower ends into the corresponding positioning blind holes 36, so as to ensure that the tooling positioning column 30 and the tooling chassis 20 are coaxial.

[0021] The tooling positioning column 30 is fastened together with the tooling chassis 20 by passing each center bolt 31 upward through the corresponding center bolt through hole 37 of the tooling positioning column 30 and fastening it to the corresponding positioning screw hole of the tooling chassis 20 .

[0022] Preferably, the tooling positioning column 30 is evenly formed with four central bolt through holes 37 around the axis.

[0023] Preferably, the positioning blind hole 36 is surrounded by the circle of central bolt through holes 37 .

[0024] Preferably, the main body 41 of the tooling pressure ring 40 is evenly formed with 12 vertical pressure ring through holes 412 around the axis.

[0025] In order to solve the above technical problems, the present invention provides a welding method using the gas turbine diffuser front disk and thickened ring welding tooling, which comprises the following steps:

[0026] S1. Place the diffuser front plate 10 coaxially on the tooling chassis 20, pass the adjusting bolt 34 through the adjusting screw hole of the tooling chassis 20 from bottom to top, and the upper end of the adjusting bolt 34 abuts against the lower side of the bottom plate 11 of the diffuser front plate 10. Adjust the distance between the bottom plate 11 of the diffuser front plate 10 and the tooling chassis 20 by rotating the adjusting bolt 34;

[0027] S2. The chassis bolt 35 passes from bottom to top through the pre-tightening through hole of the tooling chassis 20 and enters the mounting hole of the diffuser front plate 10 bottom plate 11, and pre-tightens the diffuser front plate 10 to the tooling chassis 20;

[0028] S3. A thickened ring 50 is coaxially placed on the bottom plate 11 of the diffuser front disc 10;

[0029] S4. A tooling pressure ring 40 is coaxially placed on the tooling chassis 20, and the lug 42 of the tooling pressure ring 40 is pressed onto the upper side of the thickened ring 50, and the outer wall of the main body 41 of the tooling pressure ring 40 fits the inner wall of the bottom plate 11 of the diffuser front disc 10 and the inner wall of the thickened ring 50;

[0030] S5. Pass the locking ring bolt 33 from top to bottom through the ring hole 412 of the tooling ring 40 and into the corresponding chassis locking hole of the tooling chassis 20, and coaxially place the diffuser front plate 10 and the inner edge of the thickening ring 50 on the tooling chassis 20 from bottom to top, and lock them between the lug 42 of the tooling ring 40 and the upper end of the adjusting bolt 34;

[0031] S6. The motor output shaft is connected to the center of the lower side of the tooling chassis 20 to drive the tooling chassis 20 to rotate;

[0032] S7. Welding the diffuser front disc 10 to the thickened ring 50.

[0033] The gas turbine diffuser front disc and thickening ring welding tool of the present invention, the gas turbine diffuser front disc 10 and the thickening ring 50 are stacked on the tool chassis 20, and the tool pressure ring 40 is used to position and ensure coaxiality, and the tool pressure ring 40, the tool chassis 20, the locking pressure ring bolt 33, and the adjusting bolt 34 are used to press the bottom plate 11 of the diffuser front disc 10 and the inner edge of the thickening ring 50, so as to enhance the structural rigidity of the welding part and limit the thermal deformation of the compressor front disc 10 welding area (the junction of the inner edge of the thickening ring 50 and the bottom plate 11 of the compressed diffuser front disc 10); in addition, the spacing between the bottom plate 11 of the diffuser front disc 10 and the tool chassis 20 is adjusted by the adjusting bolt 34, so as to change the pressing force of the diffuser front disc 10 and the thickening ring 50, and the welding process can be adjusted and verified; when welding, the motor works to rotate its output shaft to drive the tool chassis 20 to rotate, and the bottom plate 11 of the diffuser front disc 10 and the thickening ring 50 are welded. The gas turbine diffuser front disk and thickened ring welding tooling has a simple structure, is easy to install, and is flexible to operate. It can not only prevent the welding surface of the diffuser front disk 10 and the thickened ring 50 from separating, but also effectively reduce the local thermal deformation of the diffuser front disk 10 caused by uneven temperature distribution during welding, ensure welding penetration, and avoid cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic cross-sectional view of the overall structure of an embodiment of a gas turbine diffuser front disk and thickened ring welding tooling of the present invention;

[0036] Figure 2 It is a cross-sectional schematic diagram of a tooling positioning column of an embodiment of a tooling for welding a front disc and a thickened ring of a gas turbine diffuser according to the present invention;

[0037] Figure 3 It is a top view of a tooling positioning column of an embodiment of a tooling for welding a front disc and a thickened ring of a gas turbine diffuser according to the present invention;

[0038] Figure 4 It is a schematic diagram of a tooling pressure ring of an embodiment of a tooling for welding a front disc and a thickened ring of a gas turbine diffuser according to the present invention.

[0039] Description of reference numerals:

[0040] 10 diffuser front plate; 11 bottom plate; 50 thickening ring; 20 tooling chassis; 30 tooling positioning column; 40 tooling pressure ring; 41 main body; 42 lug; 412 pressure ring through hole; 34 adjusting bolt; 33 locking pressure ring bolt; 35 chassis bolt; 37 center bolt through hole; 36 positioning blind hole; 32 positioning pin; 31 center bolt. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1

[0043] like Figure 1 As shown, the bottom plate 11 of the diffuser front disc 10 is annular, and a circle of mounting holes is evenly formed along the axis of the bottom plate 11, which is used to mount the diffuser front disc to the air inlet of the gas turbine by passing bolts through the mounting holes; the inner diameter of the thickened ring 50 is consistent with the inner diameter of the bottom plate 11 of the diffuser front disc 10;

[0044] The gas turbine diffuser front disc and thickened ring welding tool comprises a tool chassis 20, a tool pressure ring 40, an adjusting bolt 34, a locking pressure ring bolt 33 and a chassis bolt 35;

[0045] The tooling pressure ring 40 is an angular circular ring, and an outward radial lug 42 is formed on the upper end of its main body 41. The outer diameter of the main body 41 is between 0.99r and r, where r is the inner diameter of the bottom plate 11 of the diffuser front disc 10. The main body 41 is evenly formed with a circle of vertical pressure ring through holes 412;

[0046] The tooling chassis 20 is in the shape of a circular plate, and the outer diameter of the tooling chassis 20 is smaller than R and larger than (R+r) / 2, where R is the outer diameter of the bottom plate 11 of the diffuser front disc 10;

[0047] Corresponding to the circle of mounting holes on the bottom plate 11 of the diffuser front disc 10, the tooling chassis 20 is formed with a circle of pre-tightening through holes around its axis;

[0048] Corresponding to the circle of pressing ring through holes 412 of the tooling pressing ring 40, the tooling chassis 20 is formed with a circle of chassis locking holes around its axis;

[0049] The tooling chassis 20 is also formed with a circle of adjusting screw holes around its axis, and the circle of adjusting screw holes is between the circle of pre-tightening through holes and the circle of chassis locking holes;

[0050] The adjusting bolt 34 is used to pass through the adjusting screw hole of the tooling chassis 20 from bottom to top, and the upper end abuts against the lower side of the bottom plate 11 of the diffuser front disc 10 to support the diffuser front disc 10. By rotating the adjusting bolt 34, the distance between the bottom plate 11 of the diffuser front disc 10 and the tooling chassis 20 can be adjusted;

[0051] The locking pressure ring bolt 33 is used to pass through the pressure ring through hole 412 of the tooling pressure ring 40 from top to bottom and enter the corresponding chassis locking hole of the tooling chassis 20, and lock the diffuser front plate 10 and the inner edge of the thickening ring 50 coaxially placed on the tooling chassis 20 from bottom to top between the lug 42 of the tooling pressure ring 40 and the upper end of the adjusting bolt 34;

[0052] The chassis bolts 35 are used to pass through the pre-tightening through holes of the tooling chassis 20 from bottom to top and enter the mounting holes of the bottom plate 11 of the diffuser front disc 10 to pre-tighten and fix the diffuser front disc 10 to the tooling chassis 20 .

[0053] The welding method using the gas turbine diffuser front disk and thickened ring welding tool comprises the following steps:

[0054] S1. Place the diffuser front plate 10 coaxially on the tooling chassis 20, pass the adjusting bolt 34 through the adjusting screw hole of the tooling chassis 20 from bottom to top, and the upper end of the adjusting bolt 34 abuts against the lower side of the bottom plate 11 of the diffuser front plate 10. Adjust the distance between the bottom plate 11 of the diffuser front plate 10 and the tooling chassis 20 by rotating the adjusting bolt 34;

[0055] S2. The chassis bolt 35 passes from bottom to top through the pre-tightening through hole of the tooling chassis 20 and enters the mounting hole of the diffuser front plate 10 bottom plate 11, and pre-tightens the diffuser front plate 10 to the tooling chassis 20;

[0056] S3. A thickened ring 50 is coaxially placed on the bottom plate 11 of the diffuser front disc 10;

[0057] S4. A tooling pressure ring 40 is coaxially placed on the tooling chassis 20, and the lug 42 of the tooling pressure ring 40 is pressed onto the upper side of the thickened ring 50, and the outer wall of the main body 41 of the tooling pressure ring 40 is in contact with (close to) the inner wall of the bottom plate 11 of the diffuser front disc 10 and the inner wall of the thickened ring 50;

[0058] S5. Pass the locking ring bolt 33 from top to bottom through the ring hole 412 of the tooling ring 40 and into the corresponding chassis locking hole of the tooling chassis 20, and coaxially place the diffuser front plate 10 and the inner edge of the thickening ring 50 on the tooling chassis 20 from bottom to top, and lock them between the lug 42 of the tooling ring 40 and the upper end of the adjusting bolt 34;

[0059] S6. The motor output shaft is connected to the center of the lower side of the tooling chassis 20 to drive the tooling chassis 20 to rotate;

[0060] S7. Welding the diffuser front disk 10 to the thickened ring 50 (may be laser welding).

[0061] In the first embodiment, the front disc and thickening ring welding tool of the gas turbine diffuser are stacked on the tool chassis 20, and the tool pressure ring 40 is used to position and ensure coaxiality. The bottom plate 11 of the diffuser front disc 10 and the inner edge of the thickening ring 50 are pressed by the tool pressure ring 40, the tool chassis 20, the locking pressure ring bolts 33, and the adjusting bolts 34, so as to enhance the structural rigidity of the welding part and limit the thermal deformation of the welding area of ​​the diffuser front disc 10 (the junction between the inner edge of the thickening ring 50 and the bottom plate 11 of the compressed diffuser front disc 10); in addition, the spacing between the bottom plate 11 of the diffuser front disc 10 and the tool chassis 20 is adjusted by the adjusting bolts 34, so as to change the pressing force of the diffuser front disc 10 and the thickening ring 50, so as to adjust and verify the welding process; during welding, the motor works to rotate its output shaft to drive the tool chassis 20 to rotate, and the bottom plate 11 of the diffuser front disc 10 and the thickening ring 50 are welded. The gas turbine diffuser front disk and thickened ring welding tooling of Example 1 has a simple structure, is easy to install, and is flexible to operate. It can not only prevent the welding surface of the diffuser front disk 10 and the thickened ring 50 from being separated, but also effectively reduce the local thermal deformation of the diffuser front disk 10 caused by uneven temperature distribution during welding, ensure welding penetration, and avoid cracks.

[0062] Embodiment 2

[0063] Based on the first embodiment, the gas turbine diffuser front disk and thickened ring welding tool further includes a tool positioning column 30;

[0064] The upper end of the tooling positioning column 30 is used for installation and fixation connection to the center of the lower side of the tooling chassis 20, and the lower end is used for connection to the motor output shaft.

[0065] In the second embodiment, the gas turbine diffuser front disk and thickened ring welding tooling is used. During welding, the motor is operated to rotate its output shaft, and the tooling chassis 20 is driven to rotate through the tooling positioning column 30 to weld the diffuser front disk 10 bottom plate 11 and the thickened ring 50.

[0066] Embodiment 3

[0067] Based on the gas turbine diffuser front disc and thickened ring welding tooling of embodiment 1, Figure 2 , Figure 3 As shown, the tooling positioning column 30 is evenly formed with a circle of central bolt through holes 37 around the axis;

[0068] The upper end of the tooling positioning column 30 is axially symmetrically formed with two positioning blind holes 36;

[0069] Corresponding to the circle of central bolt through holes 37 of the tooling positioning column 30, the tooling chassis 20 is formed with a circle of positioning screw holes around its axis;

[0070] Corresponding to the two blind positioning holes 36 of the tooling positioning column 30, two positioning pin holes are axially symmetrically formed on the lower side of the tooling chassis 20;

[0071] The tooling positioning column 30 is positioned with the tooling chassis 20 by inserting the upper ends of the two positioning pins 32 into the corresponding positioning pin holes and the lower ends into the corresponding positioning blind holes 36, so as to ensure that the tooling positioning column 30 and the tooling chassis 20 are coaxial.

[0072] The tooling positioning column 30 is fastened together with the tooling chassis 20 by passing each center bolt 31 upward through the corresponding center bolt through hole 37 of the tooling positioning column 30 and fastening it to the corresponding positioning screw hole of the tooling chassis 20 .

[0073] Preferably, the tooling positioning column 30 is evenly formed with four central bolt through holes 37 around the axis.

[0074] Preferably, the positioning blind hole 36 is surrounded by the circle of central bolt through holes 37 .

[0075] Preferably, the main body 41 of the tooling pressure ring 40 is evenly formed with 12 vertical pressure ring through holes 412 around the axis.

[0076] The front disk of the gas turbine diffuser of the third embodiment is welded to the thickened ring, and the lower end of the tooling positioning column 30 is completely in contact with the connecting surface of the motor output shaft to ensure a safe and reliable connection between the motor and the tooling; the tooling positioning column 30 and the tooling chassis 20 are positioned by the positioning pin 32 and locked by the center bolt 31.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas turbine diffuser front disc and thickening ring welding tool, the diffuser front disc (10) bottom plate (11) is annular, and a circle of mounting holes is evenly formed along the axis of the bottom plate (11), and the inner diameter of the thickening ring (50) is consistent with the inner diameter of the diffuser front disc (10) bottom plate (11); It is characterized in that The welding tool comprises a tool chassis (20), a tool pressure ring (40), an adjusting bolt (34), a locking pressure ring bolt (33) and a chassis bolt (35); The tooling pressure ring (40) is an angular circular ring, and the upper end of the main body (41) is formed with a radial lug (42) facing outward, the outer diameter of the main body (41) is between 0.99r and r, r is the inner diameter of the bottom plate (11) of the diffuser front disk (10), and the main body (41) is evenly formed with a circle of vertical pressure ring through holes (412); The tooling chassis (20) is in the shape of a circular plate, and the outer diameter of the tooling chassis (20) is smaller than R and larger than (R+r) / 2, where R is the outer diameter of the bottom plate (11) of the diffuser front disc (10); Corresponding to a circle of mounting holes on the bottom plate (11) of the diffuser front disc (10), the tooling chassis (20) is formed with a circle of pre-tightening through holes around its axis; Corresponding to a circle of pressing ring through holes (412) of the tooling pressing ring (40), the tooling chassis (20) is formed with a circle of chassis locking holes around its axis; The tooling chassis (20) is also formed with a circle of adjusting screw holes around its axis, and the circle of adjusting screw holes is between the circle of pre-tightening through holes and the circle of chassis locking holes; The adjusting bolt (34) is used to pass through the adjusting screw hole of the tooling chassis (20) from bottom to top, and the upper end abuts against the lower side of the bottom plate (11) of the diffuser front disc (10). By rotating the adjusting bolt (34), the distance between the bottom plate (11) of the diffuser front disc (10) and the tooling chassis (20) can be adjusted; The locking pressure ring bolt (33) is used to pass through the pressure ring through hole (412) of the tooling pressure ring (40) from top to bottom and enter the corresponding chassis locking hole of the tooling chassis (20), and lock the diffuser front plate (10) and the inner edge of the thickening ring (50) coaxially placed on the tooling chassis (20) from bottom to top between the lug (42) of the tooling pressure ring (40) and the upper end of the adjusting bolt (34); The chassis bolts (35) are used to pass through the pre-tightening through holes of the tooling chassis (20) from bottom to top and enter the mounting holes of the bottom plate (11) of the diffuser front disc (10), so as to pre-tighten and fix the diffuser front disc (10) to the tooling chassis (20).

2. The gas turbine diffuser front disc and thickened ring welding tool according to claim 1, It is characterized in that The gas turbine diffuser front disk and thickened ring welding tool further comprises a tool positioning column (30); The upper end of the tooling positioning column (30) is used for installation and fixation connection to the center of the lower side surface of the tooling chassis (20), and the lower end is used for connection to the motor output shaft.

3. The gas turbine diffuser front disc and thickened ring welding tool according to claim 2, It is characterized in that The tool positioning column (30) is evenly formed with a circle of central bolt through holes (37) around the axis; Two blind positioning holes (36) are axially symmetrically formed on the upper end of the tool positioning column (30); Corresponding to a circle of central bolt through holes (37) of the tooling positioning column (30), the tooling chassis (20) is formed with a circle of positioning screw holes around its axis; Corresponding to the two blind positioning holes (36) of the tooling positioning column (30), two positioning pin holes are axially symmetrically formed on the lower side of the tooling chassis (20); The tooling positioning column (30) and the tooling chassis (20) are positioned by inserting the upper ends of the two positioning pins (32) into the corresponding positioning pin holes and the lower ends into the corresponding positioning blind holes (36) to ensure that the tooling positioning column (30) and the tooling chassis (20) are coaxial. The tooling positioning column (30) is fastened together with the tooling chassis (20) by passing each central bolt (31) upward through the corresponding central bolt through hole (37) of the tooling positioning column (30) and fastening it to the corresponding positioning screw hole of the tooling chassis (20).

4. The gas turbine diffuser front disc and thickened ring welding tool according to claim 3, It is characterized in that The tool positioning column (30) is evenly formed with four central bolt through holes (37) around the axis.

5. The gas turbine diffuser front disc and thickened ring welding tool according to claim 3, It is characterized in that The positioning blind hole (36) is surrounded by the circle of central bolt through holes (37).

6. The gas turbine diffuser front disc and thickened ring welding tool according to claim 3, It is characterized in that The tooling pressure ring (40) main body (41) is evenly formed with 12 vertical pressure ring through holes (412) around the axis.

7. A welding method for a gas turbine diffuser front disk and a thickened ring welding tool according to any one of claims 1 to 6, It is characterized in that It includes the following steps: S1. The diffuser front plate (10) is coaxially placed on the tooling chassis (20), and the adjusting bolt (34) is passed through the adjusting screw hole of the tooling chassis (20) from bottom to top, and the upper end of the adjusting bolt (34) is abutted against the lower side of the bottom plate (11) of the diffuser front plate (10), and the distance between the bottom plate (11) of the diffuser front plate (10) and the tooling chassis (20) is adjusted by rotating the adjusting bolt (34); S2. The chassis bolt (35) is passed from bottom to top through the pre-tightening through hole of the tooling chassis (20) and enters the mounting hole of the diffuser front plate (10) bottom plate (11), and the diffuser front plate (10) is pre-tightened to the tooling chassis (20); S3. A thickened ring (50) is coaxially placed on the bottom plate (11) of the diffuser front disk (10); S4. A tooling pressure ring (40) is coaxially placed on the tooling chassis (20), the lug (42) of the tooling pressure ring (40) is pressed onto the upper side of the thickened ring (50), and the outer wall of the main body (41) of the tooling pressure ring (40) fits the inner wall of the bottom plate (11) of the diffuser front disc (10) and the inner wall of the thickened ring (50); S5. The locking pressure ring bolt (33) is passed from top to bottom through the pressure ring through hole (412) of the tooling pressure ring (40) and enters the corresponding chassis locking hole of the tooling chassis (20), and the diffuser front plate (10) and the inner edge of the thickening ring (50) coaxially placed on the tooling chassis (20) from bottom to top are locked between the lug (42) of the tooling pressure ring (40) and the upper end of the adjusting bolt (34); S6. The motor output shaft is connected to the center of the lower side of the tooling chassis (20) to drive the tooling chassis (20) to rotate; S7. Welding the diffuser front disc (10) and the thickened ring (50).

Images