A welding fixture for machining turbine shell

Abstract

The present invention discloses a welding fixture for processing a turbine shell, and relates to the technical field of welding processing. The welding fixture for processing a turbine shell comprises a welding table, a motor is fixedly installed on the top of the welding table, a processing table is fixedly installed on the top of the welding table, a reciprocating screw is rotatably installed on the top of the welding table, the fixing device comprises a clamping table, the clamping table is fixedly installed on the top of the processing table, an electric clamping rod is fixedly penetrated through the surface of the clamping table, the welding fixture for processing a turbine shell comprises a threaded rod that rotates to drive an arc plate to move in a direction away from the fixed plate until the turbine shell is fixed to the processing table, thereby achieving preliminary fixation of the turbine shell, facilitating subsequent welding work, and for a turbine shell with a complex shape, the preliminary fixation can ensure that it is always in a predetermined accurate position during the welding process, thereby meeting complex welding requirements.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, in particular to a welding fixture for processing a turbine shell. Background Art

[0002] The turbine housing is an important component in a turbine engine, usually used to carry the turbine and its related components. The main function of the turbine housing is to protect the turbine blades and their accessories, ensure the safe operation of the turbine during operation, and support the turbine shaft, guide the flow, seal, etc. It is usually made of high-strength alloy materials and has good high temperature resistance and pressure resistance.

[0003] The patent with patent announcement number CN212858365U relates to a welding fixture for turbine shell processing, including a base, a fixing device arranged on the base to fix the turbine shell, and a limiting device arranged on the base to position the bushing, the fixing device includes a fixing plate installed on the base, a circular positioning table installed on the fixing plate to perform reference positioning on the air outlet on the turbine shell, a positioning member installed on the fixing plate and abutting against the air inlet end face of the turbine shell, an abutment plate that slides against the mating surface of the turbine shell, and a driving mechanism that drives the abutment plate to slide, and a limiting member for abutting against a bypass valve to close its valve port is provided on the abutment plate. This patent has the effect of effectively improving the welding efficiency of the turbine shell rocker arm.

[0004] In the above patent, a limiter is provided on the abutment plate for abutting the bypass valve to close its valve port, which has the effect of effectively improving the welding efficiency of the turbine casing rocker arm. However, when welding the turbine casing, it may shift horizontally to the left or right or shake, which may cause its weld to fail to meet the standards or cause a hidden welding process. For this reason, a welding fixture for processing the turbine casing is designed, which has the function of initially fixing and clamping the circumferential surface. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a welding fixture for machining a turbine casing, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a welding fixture for turbine shell processing, comprising a welding table, a motor is fixedly installed on the top of the welding table, a processing table is fixedly installed on the top of the welding table, a reciprocating screw is rotatably installed on the top of the welding table, and a fixing device for fixing and clamping the circumferential surface and bottom of the turbine shell for subsequent welding or processing work is provided on the top of the processing table, the fixing device comprises a clamping table, the clamping table is fixedly installed on the top of the processing table, an electric clamping rod is fixedly penetrated through the surface of the clamping table, an arc plate is slidably installed on the inner wall of the processing table, a fixing plate is fixedly installed on the surface of the processing table, a telescopic elastic rod is fixedly installed on the surface of the fixing plate, a threaded rod is rotatably penetrated through the surface of the arc plate, and a turntable is fixedly installed on the circumferential surface of the reciprocating screw, so as to ensure that the workpiece remains stable during the welding process and reduce the movement or vibration of the workpiece during the welding process, thereby ensuring the accuracy of the welding process, avoiding deviation, and ensuring that the weld quality meets the design requirements.

[0007] According to the above technical solution, the shape of the arc plate is set to be an arc, the surface of the electric clamping rod away from the clamping table is set to be an arc, the turntable contacts the circumferential surface of the threaded rod, and the turbine shell is fixed on the processing table to achieve preliminary fixation of the turbine shell, which facilitates subsequent welding work.

[0008] According to the above technical solution, the clamping table is slidably connected to the processing table, the free end of the telescopic elastic rod is fixedly connected to the arc plate, the threaded rod and the arc plate are threadedly connected, and a transmission belt is provided between the motor and the reciprocating screw rod. For a turbine shell with a complex shape, preliminary fixation can ensure that it is always in a predetermined accurate position during the welding process, thus meeting complex welding requirements.

[0009] According to the above technical solution, the circumferential surface of the reciprocating screw rod 1 is provided with a clamping device for clamping the center of the turbine shell and supporting the inner wall thereof, the clamping device includes a sliding table, the sliding table is slidably installed on the circumferential surface of the reciprocating screw rod 1, an electric telescopic table is fixedly installed on the top of the sliding table, a clamping cylinder is fixedly installed on the inner wall of the electric telescopic table, an electric push rod is fixedly installed on the surface of the clamping cylinder, a fixed disk is fixedly installed on the output end of the electric push rod, a clamping disk is fixedly installed on the surface of the fixed disk, an extension plate is fixedly installed on the surface of the clamping cylinder, a rotating shaft 1 is fixedly passed through the surface of the extension plate, and one end of the rotating shaft 1 is away from the extension plate A rotating plate is rotatably installed, and a rotating shaft 2 is fixedly penetrated at one end of the rotating plate away from the rotating shaft 1, a clamping plate is fixedly penetrated on the circumferential surface of the rotating shaft 2, a connecting block is fixedly installed on the surface of the fixed plate, a rotating rod 1 is fixedly penetrated on the surface of the connecting block, a rotating rod 2 is fixedly penetrated on the surface of the extension plate, a rotating rod 3 is fixedly penetrated on the surface of the clamping plate, an L-shaped connecting plate is rotatably installed on the end of the rotating rod 1 away from the connecting block, and the axis of the turbine shell is clamped, which improves the stability and consistency of the turbine shell during subsequent welding work and avoids shaking or trembling during processing due to unstable clamping, thereby affecting the welding process or causing improper situations.

[0010] According to the above technical solution, the reciprocating screw rod 1 is connected to the sliding table by a threaded connection, the rotating shaft 2 is fixed through the surface of the clamping plate, and the shape of the L-shaped connecting plate is set to be L-shaped, which supports and fixes the inner wall of the turbine shell axis, further improving the stability and consistency of the turbine shell during the welding process.

[0011] According to the above technical solution, the L-shaped connecting plate is rotatably connected to the second rotating rod, the L-shaped connecting plate is rotatably connected to the third rotating rod, and the shape of the clamping plate is set to be L-shaped, which effectively controls the position and posture of the workpiece, reduces frequent adjustments caused by the instability of the workpiece, thereby reducing the burden on the equipment and extending the service life of the equipment.

[0012] According to the above technical scheme, the surface of the sliding table is provided with a knocking device for knocking the turbine shell to clean dust and adjust according to its size, the knocking device includes a slider, the slider is fixedly mounted on the surface of the sliding table, the surface of the processing table is fixedly mounted with a fixed frame, the surface of the fixed frame is rotatably penetrated by two reciprocating screws, the circumferential surface of the two reciprocating screws is fixedly mounted with an eccentric wheel, the inner wall of the clamping table is slidably mounted with a knocking rod, the end of the knocking rod close to the eccentric wheel is fixedly mounted with a knocking plate, the surface of the clamping table is fixedly mounted with two telescopic elastic rods, and the surface of the electric telescopic table is fixedly mounted with a telescopic connecting rod, the turbine shell is knocked to shake off dust impurities or welding slag attached to its surface, so that its surface after processing is smoother, the appearance quality is improved, and the stress inside the material is helped to be released and homogenized, especially in the cooling process after welding, knocking can effectively relieve residual stress and reduce the risk of cracks caused by stress concentration.

[0013] According to the above technical solution, the second reciprocating screw rod rotates and penetrates the surface of the slider, the second reciprocating screw rod and the slider are connected by a thread, the free end of the second telescopic elastic rod is fixedly connected to the surface of the knocking plate, and the telescopic connecting rod is fixedly connected to the surface of the clamping table, so that it can better adapt to turbine shells of different sizes, make the knocking position closer to the center of the workpiece, thereby improving the knocking effect, and can make the material more uniform when subjected to force, thereby improving the overall stability of the turbine shell, especially the ability to resist deformation under high temperature and high pressure conditions.

[0014] The present invention provides a welding fixture for machining a turbine shell, which has the following beneficial effects: (1) The welding fixture for processing the turbine shell starts the electric clamping rod, and the output end of the electric clamping rod moves to clamp the circumferential surface of the turbine shell, ensuring that the workpiece remains stable during the welding process and reducing the movement or vibration of the workpiece during the welding process, thereby ensuring the accuracy of the welding process, avoiding offset, and ensuring that the weld quality meets the design requirements. The threaded rod rotates to drive the arc plate to move away from the fixed plate until the turbine shell is fixed on the processing table, thereby achieving preliminary fixation of the turbine shell, facilitating subsequent welding work. For turbine shells with complex shapes, preliminary fixation can ensure that they are always in a predetermined accurate position during the welding process, meeting complex welding requirements.

[0015] (2) The welding fixture for processing the turbine shell drives the fixed plate to move by moving the electric push rod, and the fixed plate moves toward the axis of the turbine shell, driving the clamping plate to move. At this time, the electric push rod is started, and the output end of the electric push rod moves to drive the clamping plate to clamp the axis of the turbine shell, thereby improving the stability and consistency of the turbine shell during subsequent welding work, and avoiding shaking or trembling during processing due to unstable clamping, which may affect the welding process or cause improper situations.

[0016] (3) The welding fixture for processing the turbine shell drives the rotating rod three to move upward by rotating the L-shaped connecting plate, and the movement of the rotating rod three drives the clamping plate to move. At this time, the clamping plate moves under the action of the rotating rod three to support and fix the inner wall of the turbine shell axis, further improving the stability and consistency of the turbine shell during the welding process, effectively controlling the position and posture of the workpiece, reducing frequent adjustments caused by the instability of the workpiece, thereby reducing the burden on the equipment and extending the service life of the equipment.

[0017] (4) The welding fixture for processing the turbine shell contacts and squeezes the knocking plate to move toward the processing table through the rotation of the eccentric wheel. At the same time, the movement of the knocking plate drives the knocking rod to move. The knocking rod moves to knock on the turbine shell, thereby shaking off the dust impurities or welding slag attached to its surface, making its surface smoother after processing, improving the appearance quality, and helping to release and homogenize the stress inside the material. Especially in the cooling process after welding, knocking can effectively relieve residual stress and reduce the risk of cracks caused by stress concentration.

[0018] (5) The welding fixture for processing the turbine shell drives the clamping table to move by moving the telescopic connecting rod, and the movement of the clamping table drives the movement of the electric clamping rod. The movement of the electric clamping rod makes it possible to adapt to and fix turbine shells of different sizes. At the same time, the movement of the clamping table drives the movement of the knocking rod, so that it can better adapt to turbine shells of different sizes, so that the knocking position is closer to the center of the workpiece, thereby improving the knocking effect and making the material more uniform when subjected to force, thereby improving the overall stability of the turbine shell, especially the ability to resist deformation under high temperature and high pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall internal structure of the present invention; Figure 3 It is a schematic diagram of the position structure of the threaded rod and the rotating disk of the present invention; Figure 4 It is a schematic diagram of the position structure of the reciprocating screw rod 1 and the sliding table of the present invention; Figure 5 It is a schematic diagram of the position structure of the electric push rod and the fixed plate of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure of the middle part is enlarged; Figure 7 It is a schematic diagram of the position structure of the slider and the reciprocating screw rod 2 of the present invention; Figure 8 It is a schematic diagram of the position structure of the reciprocating screw rod 2 and the eccentric wheel of the present invention.

[0020] In the figure: 1, welding table; 2, motor; 3, processing table; 4, reciprocating screw rod 1; 51, clamping table; 52, electric clamping rod; 53, arc plate; 54, fixed plate; 55, telescopic elastic rod 1; 56, threaded rod; 57, turntable; 61, sliding table; 62, electric telescopic table; 63, clamping cylinder; 64, electric push rod; 65, fixed plate; 66, clamping plate; 67, extension plate; 68, rotating shaft 1; 69, rotating plate; 610, rotating shaft 2; 611, clamping plate; 612, connecting block; 613, rotating rod 1; 614, rotating rod 2; 615, rotating rod 3; 616, L-shaped connecting plate; 71, sliding block; 72, fixed frame; 73, reciprocating screw rod 2; 74, eccentric wheel; 75, knocking rod; 76, knocking plate; 77, telescopic elastic rod 2; 78, telescopic connecting rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0022] See also Figure 1-Figure 8 One embodiment of the present invention is: a welding fixture for processing a turbine shell, comprising a welding table 1, a motor 2 is fixedly installed on the top of the welding table 1, a processing table 3 is fixedly installed on the top of the welding table 1, a reciprocating screw rod 4 is rotatably installed on the top of the welding table 1, and a fixing device for fixing and clamping the circumference and bottom of the turbine shell to facilitate subsequent welding or processing operations is provided on the top of the processing table 3. The fixing device comprises a clamping table 51, the clamping table 51 is fixedly installed on the top of the processing table 3, an electric clamping rod 52 is fixedly penetrated on the surface of the clamping table 51, an arc plate 53 is slidably installed on the inner wall of the processing table 3, a fixing plate 54 is fixedly installed on the surface of the processing table 3, a telescopic elastic rod 55 is fixedly installed on the surface of the fixing plate 54, a threaded rod 56 is rotatably penetrated on the surface of the arc plate 53, and a turntable 57 is fixedly installed on the circumferential surface of the reciprocating screw rod 4, and the rotation of the reciprocating screw rod 4 drives the turntable 57 to rotate, and the rotation of the turntable 57 drives the threaded rod 56 to rotate.

[0023] The shape of the arc plate 53 is set to be an arc, the surface of the electric clamping rod 52 away from the clamping platform 51 is set to be an arc, the turntable 57 is in contact with the circumferential surface of the threaded rod 56, and the rotation of the turntable 57 drives the threaded rod 56 to rotate.

[0024] The clamping table 51 is slidably connected to the processing table 3, the free end of the telescopic elastic rod 55 is fixedly connected to the arc plate 53, the threaded rod 56 is threadedly connected to the arc plate 53, and a transmission belt is connected between the motor 2 and the reciprocating screw rod 4. Since the threaded rod 56 and the arc plate 53 are threadedly connected, the rotation of the threaded rod 56 drives the arc plate 53 to move in a direction away from the fixed plate 54 until the turbine shell is fixed on the processing table 3.

[0025] When this embodiment is working: the staff places the turbine shell on the surface of the processing table 3, starts the electric clamping rod 52, and the output end of the electric clamping rod 52 moves to clamp the circumferential surface of the turbine shell, ensuring that the workpiece remains stable during the welding process, reducing the movement or vibration of the workpiece during the welding process, thereby ensuring the accuracy of the welding process, avoiding offset, and ensuring that the weld quality meets the design requirements, and starting the motor 2 at the same time. The output end of the motor 2 rotates to drive the transmission belt 1 to rotate, and at the same time, the transmission belt 1 rotates to drive the reciprocating screw rod 14 to rotate, and the reciprocating screw rod 14 rotates to drive the turntable 57 to rotate, and the turntable 57 rotates to drive the threaded rod 56 to rotate. Because the threaded rod 56 and the arc plate 53 are connected by threads, the threaded rod 56 rotates to drive the arc plate 53 to move away from the fixed plate 54 until the turbine shell is fixed on the processing table 3, achieving preliminary fixation of the turbine shell, facilitating the subsequent welding work, and for the turbine shell with a complex shape, the preliminary fixation can ensure that it is always in the predetermined accurate position during the welding process, meeting the complex welding requirements, See also Figure 1-Figure 8On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a clamping device for clamping the center of the turbine shell and supporting the inner wall is provided on the circumferential surface of the reciprocating screw rod 4, and the clamping device includes a sliding table 61, and the sliding table 61 is slidably installed on the circumferential surface of the reciprocating screw rod 4, and an electric telescopic table 62 is fixedly installed on the top of the sliding table 61, and a clamping cylinder 63 is fixedly installed on the inner wall of the electric telescopic table 62, and an electric push rod 64 is fixedly installed on the surface of the clamping cylinder 63, and a fixed disk 65 is fixedly installed on the output end of the electric push rod 64, and a clamping disk 66 is fixedly installed on the surface of the fixed disk 65, and an extension plate 67 is fixedly installed on the surface of the clamping cylinder 63, and a rotating shaft 68 is fixedly penetrated on the surface of the extension plate 67, and the rotating shaft 68 is far away A rotating plate 69 is rotatably installed at one end of the extension plate 67, and a rotating shaft 2 610 is fixedly penetrated at one end of the rotating plate 69 away from the rotating shaft 1 68, and a clamping plate 611 is fixedly penetrated on the circumferential surface of the rotating shaft 2 610, a connecting block 612 is fixedly installed on the surface of the fixed plate 65, and a rotating rod 1 613 is fixedly penetrated on the surface of the connecting block 612, a rotating rod 2 614 is fixedly penetrated on the surface of the extension plate 67, and a rotating rod 3 615 is fixedly penetrated on the surface of the clamping plate 611, and an L-shaped connecting plate 616 is rotatably installed at one end of the rotating rod 1 613 away from the connecting block 612, and the movement of the rotating rod 1 613 drives the L-shaped connecting plate 616 to rotate with the rotating rod 2 614 as the center of the circle, and at the same time, the rotation of the L-shaped connecting plate 616 drives the rotating rod 3 615 to move upward.

[0026] The reciprocating screw rod 4 is connected to the sliding table 61 by a threaded connection, the rotating shaft 610 is fixed through the surface of the clamping plate 611, the shape of the L-shaped connecting plate 616 is set to be L-shaped, and the rotating rod 3 615 moves to drive the clamping plate 611 to move. At this time, the clamping plate 611 moves under the action of the rotating rod 3 615 to support and fix the inner wall of the turbine shell axis.

[0027] The L-shaped connecting plate 616 is rotatably connected to the second rotating rod 614, and the first rotating rod 613 moves to drive the L-shaped connecting plate 616 to rotate around the second rotating rod 614 as the center of the circle. The L-shaped connecting plate 616 is rotatably connected to the third rotating rod 615, and the shape of the clamping plate 611 is set to be L-shaped.

[0028] The surface of the sliding table 61 is provided with a knocking device for knocking the turbine shell to clean dust and adjust it according to its size. The knocking device includes a slider 71, which is fixedly mounted on the surface of the sliding table 61. A fixing frame 72 is fixedly mounted on the surface of the processing table 3. A reciprocating screw rod 73 rotates through the surface of the fixing frame 72. An eccentric wheel 74 is fixedly mounted on the circumferential surface of the reciprocating screw rod 73. A knocking rod 75 is slidably mounted on the inner wall of the clamping table 51. A knocking plate 76 is fixedly mounted on one end of the knocking rod 75 close to the eccentric wheel 74. A telescopic spring rod 77 is fixedly mounted on the surface of the clamping table 51. A telescopic connecting rod 78 is fixedly mounted on the surface of the electric telescopic table 62. When the electric telescopic table 62 moves the axis to calibrate turbine shells of different sizes, it will drive the telescopic connecting rod 78 to move. At the same time, the movement of the telescopic connecting rod 78 drives the clamping table 51 to move.

[0029] The reciprocating screw rod 2 73 rotates and penetrates the surface of the slider 71. The reciprocating screw rod 2 73 and the slider 71 are connected by threads. The free end of the telescopic elastic rod 2 77 is fixedly connected to the surface of the knocking plate 76. The telescopic connecting rod 78 is fixedly connected to the surface of the clamping platform 51. The movement of the telescopic connecting rod 78 drives the clamping platform 51 to move, and the movement of the clamping platform 51 drives the electric clamping rod 52 to move.

[0030] When this embodiment is working: when the turbine shell is initially fixed, the reciprocating screw rod 4 rotates under the action of the motor 2. Because the reciprocating screw rod 4 is connected to the sliding table 61 by a threaded connection, the rotation of the reciprocating screw rod 4 drives the sliding table 61 to move in the direction close to the processing table 3. At the same time, the movement of the sliding table 61 drives the electric telescopic table 62 to move, and the electric telescopic table 62 drives the clamping cylinder 63 to move. The movement of the clamping cylinder 63 drives the electric push rod 64 to move. At the same time, the movement of the electric push rod 64 drives the fixed plate 65 to move. The fixed plate 65 moves in the direction close to the axis of the turbine shell and drives the clamping plate 66 to move. At this time, the electric push rod 64 is started, and the output end of the electric push rod 64 moves to drive the clamping plate 66 to move to clamp the axis of the turbine shell, thereby improving the stability and consistency of the turbine shell in the subsequent welding process and avoiding the unstable clamping and thus the machining process. The electric push rod 64 moves and drives the fixed plate 65 to move toward the direction close to the turbine shell, driving the connecting block 612 to move. The connecting block 612 moves and drives the rotating rod 1 613 to move. The rotating rod 1 613 moves and drives the L-shaped connecting plate 616 to rotate with the rotating rod 2 614 as the center. At the same time, the L-shaped connecting plate 616 rotates and drives the rotating rod 3 615 to move upward. The rotating rod 3 615 moves and drives the clamping plate 611 to move. At this time, the clamping plate 611 moves under the action of the rotating rod 3 615 to support and fix the inner wall of the turbine shell axis, further improving the stability and consistency of the turbine shell during the welding process, effectively controlling the position and posture of the workpiece, reducing the frequent adjustments caused by the instability of the workpiece, thereby reducing the burden on the equipment and extending the service life of the equipment. When the sliding table 61 moves toward the processing table 3 under the action of the reciprocating screw rod 4, the sliding table 61 moves and drives the sliding block 71. Because the sliding block 71 is connected to the reciprocating screw rod 4 by a threaded connection, the movement of the sliding block 71 drives the reciprocating screw rod 4 to rotate. At this time, the rotation of the reciprocating screw rod 4 drives the eccentric wheel 74 to rotate. The eccentric wheel 74 rotates to contact and squeeze the knocking plate 76 to move toward the processing table 3. At the same time, the movement of the knocking plate 76 drives the knocking rod 75 to move. The knocking rod 75 moves to knock on the turbine shell, and the dust, impurities or welding slag attached to its surface are shaken off, making the surface smoother after processing, improving the appearance quality, and helping to release and homogenize the stress inside the material. Especially in the cooling process after welding, the knocking can In order to effectively relieve residual stress and reduce the risk of cracks caused by stress concentration, when the electric telescopic table 62 moves the axis to calibrate turbine shells of different sizes, it will drive the telescopic connecting rod 78 to move. At the same time, the movement of the telescopic connecting rod 78 drives the clamping table 51 to move, and the movement of the clamping table 51 drives the electric clamping rod 52 to move. The movement of the electric clamping rod 52 makes it possible to adapt to turbine shells of different sizes and fix them. At the same time, the movement of the clamping table 51 drives the knocking rod 75 to move, so that it can better adapt to turbine shells of different sizes, and make the knocking position closer to the center of the workpiece, thereby improving the knocking effect, and can make the material more uniform when subjected to force, thereby improving the overall stability of the turbine shell, especially the ability to resist deformation under high temperature and high pressure conditions.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for machining a turbine casing, comprising a welding table (1), characterized in that: A motor (2) is fixedly mounted on the top of the welding table (1), a processing table (3) is fixedly mounted on the top of the welding table (1), a reciprocating screw (4) is rotatably mounted on the top of the welding table (1), a fixing device for fixing and clamping the circumference and bottom of the turbine shell to facilitate subsequent welding or processing operations is provided on the top of the processing table (3), the fixing device comprises a clamping table (51), the clamping table (51) is fixedly mounted on the top of the processing table (3), an electric clamping rod (52) is fixedly penetrated through the surface of the clamping table (51), an arc plate (53) is slidably mounted on the inner wall of the processing table (3), a fixing plate (54) is fixedly mounted on the surface of the processing table (3), a telescopic elastic rod (55) is fixedly mounted on the surface of the fixing plate (54), a threaded rod (56) is rotatably penetrated through the surface of the arc plate (53), and a turntable (57) is fixedly mounted on the circumferential surface of the reciprocating screw (4).

2. A welding fixture for machining a turbine shell according to claim 1, characterized in that: The shape of the arc plate (53) is set to be an arc, the surface of the end of the electric clamping rod (52) away from the clamping platform (51) is set to be an arc, and the rotating disk (57) is in contact with the circumferential surface of the threaded rod (56).

3. A welding fixture for machining a turbine shell according to claim 2, characterized in that: The clamping table (51) is slidably connected to the processing table (3), the free end of the telescopic elastic rod (55) is fixedly connected to the arc plate (53), the threaded rod (56) is threadedly connected to the arc plate (53), and a transmission belt is provided between the motor (2) and the reciprocating screw rod (4).

4. A welding fixture for machining a turbine shell according to claim 3, characterized in that: The circumferential surface of the reciprocating screw rod (4) is provided with a clamping device for clamping the center of the turbine shell and supporting the inner wall thereof, the clamping device comprising a sliding table (61), the sliding table (61) being slidably mounted on the circumferential surface of the reciprocating screw rod (4), an electric telescopic table (62) being fixedly mounted on the top of the sliding table (61), a clamping cylinder (63) being fixedly mounted on the inner wall of the electric telescopic table (62), an electric push rod (64) being fixedly mounted on the surface of the clamping cylinder (63), a fixed disk (65) being fixedly mounted on the output end of the electric push rod (64), a clamping disk (66) being fixedly mounted on the surface of the fixed disk (65), an extension plate (67) being fixedly mounted on the surface of the clamping cylinder (63), and a clamping plate (67) being fixedly mounted on the surface of the extension plate (67). A rotating shaft (68) is passed through the fixed disk (65), and a rotating plate (69) is rotatably mounted on one end of the rotating shaft (68) away from the extension plate (67); a rotating shaft (610) is fixedly passed through one end of the rotating plate (69) away from the rotating shaft (68); a clamping plate (611) is fixedly passed through the circumferential surface of the rotating shaft (610); a connecting block (612) is fixedly mounted on the surface of the fixed disk (65); a rotating rod (613) is fixedly passed through the surface of the connecting block (612); a rotating rod (614) is fixedly passed through the surface of the extension plate (67); a rotating rod (615) is fixedly passed through the surface of the clamping plate (611); and an L-shaped connecting plate (616) is rotatably mounted on one end of the rotating rod (613) away from the connecting block (612).

5. A welding fixture for machining a turbine shell according to claim 4, characterized in that: The reciprocating screw rod 1 (4) is connected to the sliding platform (61) via a threaded connection, the rotating shaft 2 (610) is fixedly passed through the surface of the clamping plate (611), and the shape of the L-shaped connecting plate (616) is set to be L-shaped.

6. A welding fixture for machining a turbine shell according to claim 5, characterized in that: The L-shaped connecting plate (616) is rotatably connected to the second rotating rod (614), the L-shaped connecting plate (616) is rotatably connected to the third rotating rod (615), and the shape of the clamping plate (611) is set to be L-shaped.

7. A welding fixture for machining a turbine shell according to claim 6, characterized in that: The surface of the sliding table (61) is provided with a knocking device for knocking the turbine shell to clean dust and adjust according to its size, the knocking device comprising a slider (71), the slider (71) being fixedly mounted on the surface of the sliding table (61), a fixing frame (72) being fixedly mounted on the surface of the processing table (3), a reciprocating screw rod (73) being rotatably penetrated through the surface of the fixing frame (72), an eccentric wheel (74) being fixedly mounted on the circumferential surface of the reciprocating screw rod (73), a knocking rod (75) being slidably mounted on the inner wall of the clamping table (51), a knocking plate (76) being fixedly mounted on one end of the knocking rod (75) close to the eccentric wheel (74), a telescopic spring rod (77) being fixedly mounted on the surface of the clamping table (51), and a telescopic connecting rod (78) being fixedly mounted on the surface of the electric telescopic table (62).

8. A welding fixture for machining a turbine shell according to claim 7, characterized in that: The second reciprocating screw rod (73) rotates and penetrates the surface of the slider (71); the second reciprocating screw rod (73) and the slider (71) are connected via threads; the free end of the second telescopic elastic rod (77) is fixedly connected to the surface of the knocking plate (76); and the telescopic connecting rod (78) is fixedly connected to the surface of the clamping platform (51).

Images