Turbine guide vane shell welding and setting device and welding setting method thereof

Abstract

The present application relates to turbine guide shell welding shaping device and its welding shaping method, for welding front mounting edge, guide shell, rear mounting edge, comprising radial positioning assembly, axial positioning assembly; The axial assembly comprises a rotating shaft and two positioning discs sleeved on the rotating shaft, and the welding front mounting edge and the rear mounting edge can be respectively correspondingly clamped into the inner side surfaces of the two positioning discs and sleeved on the rotating shaft through the positioning discs; The radial positioning assembly comprises a positioning inner sleeve and a positioning outer sleeve; The guide shell is clamped by the positioning inner sleeve and the positioning outer sleeve to form a shell structure in the shape of an arc piece to realize radial positioning of the guide shell.The beneficial effects of the present application are that it can prevent welding deformation and ensure that the size of the guide shell meets the requirements of the drawings after welding and heat treatment.

Description

Technical Field

[0001] This invention relates to the field of welding engine turbine guide vane housings, and more specifically to a turbine guide vane housing welding shaping device and a welding shaping method thereof. Background Technology

[0002] The turbine guide vane of a certain type of helicopter engine is assembled from multiple thin-walled components welded together. Its housing consists of a front mounting edge, a rear mounting edge, and a guide vane outer sleeve, all made of 1Cr18Ni9Ti material. The guide vane outer sleeve has a wall thickness of 1mm and an outer diameter of Φ190mm, and is an open structure. The maximum diameter and thickness of the front and rear mounting edges are both 2mm. As the guide vane housing is a thin-walled component, both the welding process and post-weld heat treatment will cause severe deformation.

[0003] Therefore, a turbine guide housing welding shaping device is proposed. During the welding of the outer shell of the engine turbine guide, the front mounting edge, the guide housing, and the rear mounting edge are positioned to ensure the post-weld dimensions, which helps to prevent welding deformation and ensures that the post-weld dimensions meet the drawing specifications. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a welding and shaping device and method for a certain type of helicopter engine turbine guide housing. During the welding of the outer shell of the engine turbine guide, the front mounting edge, the guide housing, and the rear mounting edge are positioned to ensure the post-weld dimensions. At the same time, it facilitates the subsequent use of post-weld heat treatment processes to eliminate welding stress, improve weld structure and overall performance, stabilize the external dimensions of the guide housing, and ensure that the dimensions of the guide housing conform to the drawing specifications after welding and heat treatment.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A turbine guide vane housing welding and shaping device is used for welding the front mounting edge, guide vane housing, and rear mounting edge. It includes a radial positioning assembly and an axial positioning assembly. The axial assembly includes a rotating shaft and two positioning discs rotatably mounted on the shaft. The front and rear mounting edges can be respectively engaged with the inner surfaces of the two positioning discs and mounted relative to each other on the rotating shaft via the positioning discs. The radial positioning assembly includes an inner positioning sleeve and an outer positioning sleeve. The guide vane housing is clamped by the inner and outer positioning sleeves to form an arc-shaped shell structure to achieve radial positioning of the guide vane housing.

[0007] During welding, the inner and outer positioning sleeves are fitted onto the rotating shaft and positioned between the front and rear mounting sides, so that the two ends of the guide housing are respectively connected to the front and rear mounting sides. The outer positioning sleeve has a notch, and the joint between the front mounting side and the guide housing, and the joint between the guide housing and the rear mounting side can be partially exposed through the notch.

[0008] Before welding, there is no assembly and positioning mechanism between the three parts: the front mounting edge, the guide housing, and the rear mounting edge. This solution uses positioning plates, radial positioning components, axial limiting nuts, and other parts to limit the relative positions between the front mounting edge, the guide housing, and the rear mounting edge. Therefore, the welding process of this solution can be defined as follows: first, use the tooling of this solution to spot weld the three components of the front mounting edge, the guide housing, and the rear mounting edge housing to fix their external dimensions, and then weld them together as a whole.

[0009] During the overall welding process, a rotating mechanism is formed by the rotation of the shaft, which makes the device rotate during the welding process until the welding is completed.

[0010] In a preferred embodiment of this solution, the welding shaping device further includes a base plate, two support blocks mounted on the base plate, and a rotating shaft detachably rotatably mounted on the top of the two support blocks at both ends; a rotating shaft handwheel is provided after one end of the rotating shaft passes through the corresponding support block; the rotating shaft and the rotating shaft handwheel are detachably connected. This facilitates manual rotation of the rotating shaft during the welding process, and thus facilitates manual rotation of the overall structure consisting of the front mounting edge, guide housing, and rear mounting edge during the welding process.

[0011] In a preferred embodiment of this solution, the rotating shaft is provided with a stepped shaft in the middle, the width of which is adapted to the width of the guide housing; threaded sections are also provided on both sides of the stepped shaft, and axial limiting nuts are threaded into the threaded sections. During welding, the two positioning discs can be fitted on both sides of the stepped shaft and pressure is applied to the middle of the rotating shaft through the axial limiting nuts so that the front mounting edge, the guide housing, and the rear mounting edge come into contact.

[0012] In a preferred embodiment of this solution, the positioning sleeve includes a left positioning plate and a right positioning plate; the left and right positioning plates are screwed onto left and right screw rods, which are mounted on a base plate, and the threads on both sides of the left and right screw rods are opposite to drive the left and right positioning plates to move relative to each other or away from each other; each of the left and right positioning plates has an arc-shaped part on its opposite surface, and when the left and right positioning plates move relative to each other until they contact each other, the two arc-shaped parts form a ring structure with a notch at the top.

[0013] In a preferred embodiment of this solution, a screw handwheel is provided at one end of the left and right screws for easy manual operation.

[0014] In a preferred embodiment of this solution, the base plate is further provided with a slide rail, and the bottom of the left positioning plate and the bottom of the right positioning plate are respectively provided with limiting blocks corresponding to the slide rail. Through the cooperation of the slide rail and the limiting blocks, the left and right positioning plates can move relative to each other or in opposite directions during the rotation of the left and right screws.

[0015] In a preferred embodiment of this solution, the top of the support block is provided with a half hole for supporting the end of the rotating shaft; the top of the support block is also provided with a rotating shaft pressing block, one end of which is hinged to one side of the half hole, and the other end of which is locked to the other side of the half hole by a rotating shaft pressing screw and a pin.

[0016] This solution also provides a welding shaping method using the aforementioned turbine guide vane housing welding shaping device, the welding shaping method comprising the following steps:

[0017] S0. Assemble the turbine guide housing welding shaping device. After assembly, part of the guide housing is visible at the notch.

[0018] S1. Spot weld the guide housing at the exposed notch;

[0019] S2. Rotate the shaft and rotate the shaft and the guide housing together by a certain angle, then spot weld the guide housing at the exposed notch.

[0020] S3. Repeat the above operation until the front and rear mounting edges of the guide housing are spot welded in a complete circle.

[0021] S4. After the entire circle of spot welding is completed, rotate the screw handwheel. The left and right positioning plates will move outward along the shaft axis at the same time. The left and right positioning plates will not retract from the inner end face of the front and rear mounting sides. The radial distance between the left and right positioning plates and the guide housing is -mm.

[0022] S5. Weld the front mounting edge to the guide housing at the top notch of the left and right positioning plates. While welding, rotate the shaft handwheel to rotate the guide one revolution to complete the welding of the front mounting edge to the guide housing. Repeat this operation to complete the welding of the mounting edge to the guide housing.

[0023] In a preferred embodiment of this solution, the welding shaping method further includes step S6 after step S5:

[0024] S6. After welding is completed, rotate the handwheel of the rotating shaft. The left and right positioning plates move axially towards the rotating shaft at the same time, retracting the left and right positioning plates until they contact the outer wall of the guide housing. At this time, the guide housing is axially clamped by the two positioning plates, and the inner and outer circles of the guide housing are clamped by the left and right positioning plates and the positioning inner sleeve. The shape of the guide housing is controlled by this welding shaping device. Afterward, the guide housing together with this welding shaping device is placed in a high-temperature furnace for heat treatment to eliminate welding stress.

[0025] The beneficial effects of this invention are:

[0026] (1) This solution uses an axial positioning assembly consisting of a rotating shaft, a positioning plate, an axial limiting nut, and other parts, as well as a radial positioning assembly consisting of a positioning inner sleeve and a positioning outer sleeve, to restrict the position of a certain type of helicopter engine turbine guide housing, thereby achieving welding positioning between the three workpieces: the front mounting edge, the guide housing, and the rear mounting edge.

[0027] Meanwhile, this solution achieves radial positioning by using the inner and outer positioning sleeves to clamp the inner and outer surfaces of the guide housing.

[0028] Furthermore, the radial positioning component does not need to be locked while controlling the circumferential size of the guide housing. By rotating the shaft, the workpiece can be rotated to gradually rotate the part to be welded to the top notch of the radial positioning component, where welding can be performed at various points on the circumference of the workpiece.

[0029] Therefore, this solution can accurately position the front mounting edge, guide housing, and rear mounting edge, solving the problem of shape determination during the welding and manufacturing of a certain type of helicopter engine turbine guide housing;

[0030] In addition, the rotating shaft is mounted on the support block, and a handwheel is provided at one end of the rotating shaft. After the three parts of the front mounting side, guide housing and rear mounting side are initially welded together, the rotating shaft can be turned by hand to drive the rotation of the guide housing.

[0031] The welding method achieved by gradually rotating the shaft can be specifically designed as spot welding followed by full welding. That is, the shaft is rotated gradually for the first time, and spot welding is performed during the rotation to determine the shape of the guide housing. Then, the shaft is rotated gradually for the second time to achieve full welding. This solution can help avoid the problem of severe deformation during welding and ensure that the dimensions after welding meet the drawing specifications.

[0032] (2) In this scheme, the rotating shaft is detachably installed on the support block. After welding, the rotating shaft and the workpiece on the rotating shaft can be put into a high-temperature furnace for heat treatment to eliminate welding stress, improve weld structure and comprehensive performance, and stabilize the outer dimensions of the guide housing. Thus, this scheme can ensure that the dimensions of the guide housing conform to the drawings after welding and heat treatment. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the present invention;

[0034] Figure 2 This is a schematic cross-sectional view of the present invention;

[0035] Figure 3 This is a schematic diagram of the product welded according to the present invention. Detailed Implementation

[0036] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0037] It should be noted that, since the guide housing is a thin-walled component, both the welding process and post-weld heat treatment will cause severe deformation. Ensuring the post-weld dimensions of the guide housing and controlling its deformation within the range specified in the drawings are key design considerations. Therefore, the following design scheme was implemented.

[0038] like Figures 1-3 As shown, a welding and shaping device for a certain type of helicopter engine turbine guide housing includes a base plate 1, two support blocks 2, and a housing positioning mechanism; the housing positioning mechanism includes a radial positioning component and an axial positioning component.

[0039] The guide housing has a wall thickness of 1mm and an outer diameter of Φ190mm. It is an open structure. The diameters of the front mounting edge a and the rear mounting edge c, as well as the maximum thickness of the guide housing b, are all 2mm. During welding, the front mounting edge a and the rear mounting edge c are not drilled, so their radial direction is non-directional and there is no need to control the circumferential direction. However, the guide housing b is an open structure, and its inner and outer circumferential diameters need to be positioned. Therefore, this solution designs a radial positioning component to control its circumferential dimensions. At the same time, this solution designs an axial positioning component to control the overall axial dimensions of the guide housing b.

[0040] Specifically, the axial assembly includes a rotating shaft 3 and two positioning discs 5 that can be fitted onto the rotating shaft 3, and the radial positioning assembly includes an inner positioning sleeve 4 and an outer positioning sleeve.

[0041] The positioning disk 5 has an annular groove on its inner side that matches the outer contour of the front mounting edge a or the rear mounting edge c. The two ends of the rotating shaft 3 are detachably rotatably mounted on the top of the two support blocks 2. The rotating shaft 3 has a stepped shaft 301 in the middle, and the width of the stepped shaft 301 matches the width of the guide housing b. The front mounting edge a and the rear mounting edge c can be respectively installed in the annular grooves on the inner side of the two positioning disks 5, and are fitted onto the rotating shaft 3 by the positioning disks 5. The guide housing b is fitted between the inner positioning sleeve 4 and the outer positioning sleeve. The inner positioning sleeve 4 and the outer positioning sleeve cooperate to form radial positioning of the guide housing b. During welding, the inner positioning sleeve 4 and the outer positioning sleeve are fitted onto the rotating shaft 3 and located between the front mounting edge a and the rear mounting edge c.

[0042] Meanwhile, in this embodiment, threaded sections 302 are provided on both sides of the stepped shaft 301. The threaded sections 302 are threaded with axial limiting nuts 7. The two positioning discs 5 can be fitted on both sides of the stepped shaft 301 and apply pressure to the middle of the rotating shaft 3 through the axial limiting nuts 7, so that the two ends of the guide housing b are respectively connected to the front mounting side a and the rear mounting side c, thereby achieving axial positioning.

[0043] Furthermore, in this embodiment, the positioning jacket is provided with a notch, and the welding positions between the front mounting edge a and the guide housing b, and between the guide housing b and the rear mounting edge c, can be partially exposed from the notch to facilitate welding operations at the notch.

[0044] During welding, the guide housing must be in accordance with Figure 3 The indicated position is circumferentially welded; the guide housing b is a thin-walled part, and after welding, it needs to be heat-treated to stabilize its post-weld state.

[0045] Furthermore, in this solution, the outer casing positioning mechanism includes a left positioning plate 601 and a right positioning plate 602; the left positioning plate 601 and the right positioning plate 602 are screwed onto left and right screw rods 8, which are mounted on the base plate 1, and the threads on both sides of the left and right screw rods 8 are opposite to drive the left positioning plate 601 and the right positioning plate 602 to move relative to each other or away from each other; each of the left positioning plate 601 and the right positioning plate 602 has an arc-shaped part on its opposite surface, and when the left positioning plate 601 and the right positioning plate 602 move relative to each other until the left positioning plate 601 and the right positioning plate 602 contact each other, the two arc-shaped parts form a circular structure with a notch.

[0046] Optionally, in this embodiment, the outer shell positioning mechanism further includes a slide rail 16. The bottom of the left positioning plate 601 and the bottom of the right positioning plate 602 are respectively provided with limiting blocks corresponding to the slide rail 16, so that when the left and right screws 8 are rotated, the left positioning plate 601 and the right positioning plate 602 can move relative to each other or in opposite directions along the slide rail 16.

[0047] refer to Figure 1 As shown, in this scheme, one end of the left and right screws 8 is provided with a screw handwheel 13 to drive the left positioning plate 601 and the right positioning plate 602 to move relative to each other or in opposite directions; one end of the rotating shaft 3 is provided with a rotating shaft handwheel 14, through which the rotating shaft 3 can be manually rotated to facilitate the rotation of the guide housing for spot welding and full welding.

[0048] In this embodiment, the welding shaping device also includes a rotating shaft pressure block 10 and a rotating shaft clamping screw sleeve 9; the tops of the two mounting support blocks 2 are respectively provided with half holes to support the two ends of the rotating shaft 3; one end of the rotating shaft pressure block 10 is hinged to one side of the half hole, and the other end of the rotating shaft pressure block 10 is locked and installed on the other side of the half hole by the rotating shaft clamping screw sleeve 11 and the pin 12. The design of the rotating shaft pressure block 10 makes it easy to remove the entire guide housing upwards for post-weld heat treatment.

[0049] Instructions for operation in this embodiment:

[0050] Before welding, remove the rotating shaft 3, rotate it to the top and install the axial limiting nut 7 and a positioning plate 5 on one side. Rotate the axial limiting nut 7 to press it against one end face of the stepped shaft 301 of the rotating shaft 3. Then install the front mounting side a, the guide housing b, and the rear mounting side c on the rotating shaft 3 in sequence. Install the positioning inner sleeve 4 in the inner hole of the guide housing b.

[0051] Then, another positioning plate 5 and another axial limiting nut 7 are sequentially installed on the rear mounting edge c end of the rotating shaft 3. Rotating the axial limiting nut 7 presses down the guide housing b assembly (note that at this time, the stops of the front mounting edge a and the rear mounting edge c are already inserted into the outer diameter of the guide housing b, but the three should not be pressed together; there is a certain gap that can be adjusted). At this point, the rotating shaft 3 (along with all the parts mounted on it) is placed into the half-holes of the end support blocks 2. Rotating the screw handwheel 13 on the left and right screws 8 causes the left positioning plate 601 and the right positioning plate 602 to move axially toward the rotating shaft 3 simultaneously, adjusting the rotating shaft 3. Position the left positioning plate 601 and right positioning plate 602 so that they are in the middle of the front and rear mounting sides of the guide housing b; rotate the screw handwheel 13 on the left and right screws 8 until the left positioning plate 601 and right positioning plate 602 are in contact in the middle and cannot be moved. At this time, the left positioning plate 601 and right positioning plate 602 form a circle with a notch. The guide housing b is inside the circle formed by the left positioning plate 601 and right positioning plate 602. Since the guide housing b is an open structure, the left positioning plate 601, right positioning plate 602 and positioning inner sleeve 4 on the device are used to radially clamp it to determine its inner and outer ring dimensions.

[0052] Then, rotate the axial limiting nut 7 at the rear mounting edge c to press the guide housing b tightly. The axial dimension of the guide housing b is limited by the upper stepped shaft 301 of the rotating shaft 3. After the axial limiting nut 7 is pressed, the rotating shaft pressure block 10 is lowered and the rotating shaft clamping nut 11 is tightened to complete the assembly of the welding and shaping device for the engine turbine guide housing b. At this time, only the upper openings (i.e., the circular notches) of the left positioning plate 601 and the right positioning plate 602 are visible in the shape of the guide housing b. Then, spot welding is performed on the guide housing exposed at the upper openings of the left positioning plate 601 and the right positioning plate 602. After spot welding the front mounting edge a and the rear mounting edge c at this exposed position to the guide housing b, rotate the rotating shaft handwheel 14 to rotate the rotating shaft 3 and the guide as a whole by a certain angle. Then, spot welding is performed on the guide housing exposed at the upper openings of the left positioning plate 601 and the right positioning plate 602.

[0053] Repeat the above operation until the front and rear mounting edges of the guide housing b are spot welded in a complete circle;

[0054] After spot welding is completed, rotate the screw handwheel 13. The left positioning plate 601 and the right positioning plate 602 move outward along the shaft 3 simultaneously. The left positioning plate 601 and the right positioning plate 602 do not retract from the inner end face of the front mounting edge a and the rear mounting edge c. The radial distance between the left positioning plate 601 and the right positioning plate 602 and the guide housing is 3-4 mm. Then, weld the joint position between the front mounting edge a and the guide housing b at the opening of the left positioning plate 601 and the right positioning plate 602. At the same time as welding, rotate the shaft handwheel. After rotating the guide one revolution using the shaft 3, the welding of the front mounting edge a and the guide housing b is completed. Then, repeat this operation to complete the welding of the joint position between the mounting edge c and the guide housing b.

[0055] After welding is completed, rotate the handwheel 14 of the rotating shaft. The left positioning plate 601 and the right positioning plate 602 move axially toward the rotating shaft 3 simultaneously, retracting the left positioning plate 601 and the right positioning plate 602 until they contact the outer wall of the guide housing b. At this time, the guide housing b is axially clamped by the two positioning discs 5, and the inner and outer circles of the housing are clamped by the left and right positioning plates 602 and the positioning inner sleeve 4. The shape of the guide housing b is controlled by this welding shaping device. Afterward, the guide housing b, together with this welding shaping device, is placed in a high-temperature furnace for heat treatment to eliminate welding stress, improve weld structure and comprehensive performance. At the same time, this device limits the post-weld dimensions so that the dimensions of the guide housing b conform to the drawing specifications after heat treatment.

[0056] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A welding shaping method for a turbine guide vane housing welding shaping device, wherein the turbine guide vane housing welding shaping device is used for welding the pre-installation side (a), the guide vane housing (b), and the post-installation side (c), characterized in that: The turbine guide vane housing welding and shaping device includes a radial positioning assembly and an axial positioning assembly; The axial positioning assembly includes a rotating shaft (3) and two positioning discs (5) rotatably mounted on the rotating shaft (3). The pre-welding mounting edge (a) and the post-welding mounting edge (c) can be respectively inserted into the inner side of the two positioning discs (5) and mounted on the rotating shaft (3) via the positioning discs (5). The radial positioning assembly includes a positioning inner sleeve (4) and a positioning outer sleeve; The guide housing (b) is clamped by the positioning inner sleeve (4) and the positioning outer sleeve to form a circular arc-shaped housing structure to achieve radial positioning of the guide housing (b); During welding, the inner positioning sleeve (4) and the outer positioning sleeve are fitted onto the rotating shaft (3) and positioned between the front mounting edge (a) and the rear mounting edge (c), so that the two ends of the guide housing (b) are respectively connected to the front mounting edge (a) and the rear mounting edge (c); The positioning sleeve has a notch, and the joint between the front mounting edge (a) and the guide housing (b), and the joint between the guide housing (b) and the rear mounting edge (c) can be partially exposed from the notch; The welding shaping device also includes a base plate (1), two support blocks (2) mounted on the base plate (1), and a rotating shaft (3) detachably mounted on the top of the two support blocks (2) at both ends; a rotating shaft handwheel (14) is provided after one end of the rotating shaft (3) passes through the corresponding support block (2); the rotating shaft (3) and the rotating shaft handwheel (14) are detachably connected. The positioning sleeve includes a left positioning plate (601) and a right positioning plate (602); the left positioning plate (601) and the right positioning plate (602) are screwed onto left and right screw rods (8) respectively, the left and right screw rods (8) are mounted on the base plate (1), and the threads on both sides of the left and right screw rods (8) are opposite to drive the left positioning plate (601) and the right positioning plate (602) to move relative to each other or away from each other; each of the left positioning plate (601) and the right positioning plate (602) has an arc-shaped part on its opposite surface. When the left positioning plate (601) and the right positioning plate (602) move relative to each other until the left positioning plate (601) and the right positioning plate (602) contact each other, the two arc-shaped parts form a ring structure with a top notch; One end of the left and right screws (8) is provided with a screw handwheel (13); The welding shaping method includes the following steps: S0. Assemble the turbine guide housing welding shaping device. After assembly, part of the guide housing (b) is visible at the notch. S1. Spot weld the guide housing at the exposed notch; S2. Rotate the shaft (3) and rotate the shaft (3) and the guide housing together by a certain angle, and then spot weld the guide housing at the exposed notch. S3. Repeat the above operation until the front and rear mounting edges of the guide housing (b) are spot welded in a complete circle; S4. After the entire circle of spot welding is completed, rotate the screw handwheel (13). The left positioning plate (601) and the right positioning plate (602) move outward along the axis of the rotating shaft (3) at the same time. The left positioning plate (601) and the right positioning plate (602) do not retract from the inner end face of the front mounting edge (a) and the rear mounting edge (c). The radial distance between the left positioning plate (601) and the right positioning plate (602) and the guide housing is 3-4mm. S5. Weld the front mounting edge (a) and guide housing (b) at the top notch of the left positioning plate (601) and right positioning plate (602). While welding, rotate the shaft handwheel (14) and rotate the guide one turn using the shaft (3) to complete the welding of the front mounting edge (a) and guide housing (b). Then repeat this operation to complete the welding of the mounting edge (c) and guide housing (b).

2. The welding shaping method of the turbine guide vane housing welding shaping device according to claim 1, characterized in that: The rotating shaft (3) is provided with a stepped shaft (301) in the middle, and the width of the stepped shaft (301) is adapted to the width of the guide housing (b); The stepped shaft (301) is also provided with threaded sections (302) on both sides. The threaded sections (302) are threaded with axial limiting nuts (7). During welding, the two positioning discs (5) can be fitted on both sides of the stepped shaft (301) and pressure is applied to the middle of the rotating shaft (3) through the axial limiting nuts (7) so that the front mounting edge (a), the guide housing (b), and the rear mounting edge (c) come into contact.

3. The welding shaping method of the turbine guide vane housing welding shaping device according to claim 1, characterized in that: The base plate (1) is also provided with a slide rail (16), and the bottom of the left positioning plate (601) and the bottom of the right positioning plate (602) are respectively provided with limiting blocks corresponding to the slide rail (16).

4. The welding shaping method of the turbine guide vane housing welding shaping device according to claim 3, characterized in that: The support block (2) has a half hole at the top to support the end of the rotating shaft (3); The top of the support block (2) is also provided with a rotating shaft pressure block (10). One end of the rotating shaft pressure block (10) is hinged to one side of the half hole, and the other end is locked and installed on the other side of the half hole by the rotating shaft clamping screw sleeve (11) and the pin (12).

5. The welding shaping method of the turbine guide vane housing welding shaping device according to claim 1, characterized in that: The welding shaping method further includes step S6 after step S5: S6. After welding is completed, rotate the handwheel (14) of the rotating shaft. The left positioning plate (601) and the right positioning plate (602) move axially toward the rotating shaft (3) at the same time, and retract the left positioning plate (601) and the right positioning plate (602) until they contact the outer wall of the guide housing (b). At this time, the guide housing (b) is clamped axially by the two positioning plates (5), and the inner and outer circles of the guide housing are clamped by the left positioning plate (601), the right positioning plate (602) and the positioning inner sleeve (4). The shape of the guide housing (b) is controlled by this welding shaping device. After that, the guide housing (b) together with this welding shaping device is placed in a high-temperature furnace for heat treatment to eliminate welding stress.

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