A processing technology for a GIS housing with a corner

Abstract

The present invention provides a GIS shell processing technology with a corner, comprising the following steps: S1: blanking the first main cylinder, fixing it on a lathe for rough turning to a fixed length; S2: fixing the first main cylinder on a marking tool, the marking tool comprising a marking ring, the marking ring comprising a relative marking bevel and a calibration plane, marking a cutting line with an angle of α° to the end face along the marking bevel and cutting to form a first cutting surface; S3: using the marking tool to mark a cutting line with an angle of α° to the end face on the second main cylinder and cutting to form a second cutting surface; S4: pre-positioning the first main cylinder and the second main cylinder by a welding tool, so that the angle between the central axes of the first main cylinder and the second main cylinder is 2α°; S5: fitting the first cutting surface and the second cutting surface tightly, welding the first main cylinder and the second main cylinder to form a cylinder with a corner. The GIS shell processing technology with a corner of the present invention can effectively meet the beneficial effects of high precision, low overall manufacturing cost and convenient operation.

Description

Technical Field

[0001] The present invention relates to the technical field of GIS housing processing, and more specifically, to a processing technology for a GIS housing with a corner Background Art

[0002] The GIS housing is used as a basic carrier in the power transmission system. Its structure generally includes a cylindrical barrel and two end flanges. Since high-voltage power transmission has a long span and complex route conditions, multiple GIS housings need to be spliced to meet the installation of long-distance high-voltage transmission lines. At the same time, the GIS housing also needs to be provided with a corner to meet the turning of the high-voltage transmission line and avoid obstacles below.

[0003] The existing processing technology for a GIS housing with a corner is as follows:

[0004] First, provide two barrels. At one end of the two barrels, an inclined surface with the same angle is formed by manual cutting. The two inclined surfaces are welded to form a barrel with a corner. Further install flanges at both ends of the barrel, and then perform rough machining and finish machining on the flanges. Finally, a GIS housing with a corner is formed, as Figure 1 shown.

[0005] However, the above technology has three technical problems:

[0006] 1. When manually cutting one end of the barrel, the inclined surface is marked by manually cooperating with an angle gauge, and the marked angle line often has a large deviation from the actual requirement;

[0007] 2. When the two barrels are welded and spliced, there is no special tool, and only two corresponding supporting brackets can be used to slowly move the barrels to fit and then butt;

[0008] 3. After installing the flange on the barrel, in order to further perform rough machining and finish machining to ensure concentricity with the barrel, so as to ensure that there is no risk of electric leakage due to insufficient splicing accuracy or poor stability when splicing with the flange of other barrels at different heights. When performing finish machining on the flange installed on the barrel, due to the angle between the two barrels, it is impossible to accurately find the central axis of the flange, resulting in poor accuracy when the boring machine turns the outer circle of the flange.

[0009] In summary, how to provide a processing technology for a GIS housing with a corner that has high precision, low overall manufacturing cost and is easy to operate has become an urgent technical problem in this field. Summary of the Invention

[0010] The purpose of the present invention is to provide a processing technology for a GIS housing with a corner that has high precision, low overall manufacturing cost and is easy to operate.

[0011] To achieve the above object, the present invention adopts the following technical solutions:

[0012] A GIS shell processing technology with a corner includes the following steps:

[0013] S1: The first main barrel is unloaded and fixed on the lathe for rough turning to fixed length;

[0014] S2: Fix the first main cylinder on a marking tool, wherein the marking tool comprises a marking ring, wherein the marking ring comprises opposite marking slopes and a calibration plane, so that one end surface of the first main cylinder is flush with the calibration plane, and the marking slope is arranged around the first main cylinder, a cutting line with an angle of α° to the end surface is drawn along the marking slope, and the first main cylinder is cut along the cutting line to form a first cutting surface;

[0015] S3: Referring to step S2, use a marking tool to mark a cutting line at an angle of α° to the end surface on the second main tube, and cut the second main tube along the cutting line to form a second cutting surface;

[0016] S4: Pre-positioning the first main cylinder and the second main cylinder by welding the tooling so that the angle between the central axes of the first main cylinder and the second main cylinder is 2α°;

[0017] S5: Fit the first cutting surface and the second cutting surface tightly together, and weld the first main cylinder and the second main cylinder to form a cylinder with a corner.

[0018] As a further improvement, the S4 step specifically includes: the welding tooling includes a first limit seat, a second limit seat and an angle clamping block, the first limit seat and the second limit seat are provided with a limit block with a circular arc notch for positioning the first main cylinder and the second main cylinder, the first limit seat and the second limit seat are both provided with clamping grooves for respectively clamping the two ends of the angle clamping block, so that the angle between the first limit seat along the center axis of the first main cylinder and the second limit seat along the center axis of the second main cylinder is 2α°.

[0019] As a further improvement, after any one of the steps, the following steps are further included:

[0020] SA: Provide at least one flange for rough turning and opening of fixing holes, and weld the flange to the uncut end face of the first main cylinder and / or the second main cylinder.

[0021] As a further improvement, the S4 step further includes the following steps: providing two flanges for rough turning and opening fixing holes, welding the flanges to the uncut end faces of the first main cylinder and the second main cylinder to form a GIS shell with a corner; a plurality of arc-shaped limiting holes are opened on the limiting block of the flange, and at least two positioning pins are inserted into the limiting holes and the fixing holes to achieve positioning between the flange and the cylinder.

[0022] As a further improvement, after the step S5, the following steps are further included:

[0023] S6: Install a scribing block along the weld formed by welding the first cutting surface and the second cutting surface. The scribing block includes at least two hypotenuses arranged parallel to the central axes of the first main cylinder and the second main cylinder respectively. The surface of the scribing block in contact with the main cylinder is an arc surface and is provided with a weld fixing groove, and scribing is performed on the first main cylinder and the second main cylinder along the two hypotenuses.

[0024] As a further improvement, the scribing block is in the shape of a right trapezoid, its inclined waist is parallel to the central axis of the first main cylinder, its bottom edge is parallel to the central axis of the second main cylinder, and an auxiliary line forming an angle of 2α° with the inclined waist is scribed along the bottom edge.

[0025] As a further improvement, the following steps are further included:

[0026] S7: Correct the position of the boring machine spindle to be parallel to the auxiliary line, and adjust the spindle height to coincide with the central axis of the second main cylinder, and start the boring machine to perform finish machining on the flange.

[0027] As a further improvement, the following steps are further included:

[0028] S8: Remove the housing from the boring machine, support and fix the first cylinder body at one end through a flange detection tooling, provide an auxiliary support seat at the other end to support and fix the bottom of the second cylinder body, then fix a detection strip block to the flange, and open a center line on the detection strip block to align with the auxiliary line.

[0029] As a further improvement, the following steps are further included:

[0030] S9: Provide an internal installation block tooling, which includes a positioning fixing disk, a bent extension part and an installation block fixing ring. Connect and fix the positioning fixing disk to the flange on one side of the second cylinder body. The bent extension part includes two bent strips forming an angle of 2α°. A plurality of installation block fixing positions are provided on the installation block fixing ring.

[0031] As a further improvement, the welding tooling further includes at least one third limit seat, and the limit block with an arc notch on the third limit seat is used to assist in supporting the relatively long first main cylinder or second main cylinder.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. The processing technology of the GIS housing with a corner of the present invention can quickly and accurately scribe the required cutting line through the cooperation of the scribing inclined plane and the calibration plane, avoiding the technical problem of large errors caused by manual scribing judged by the human eye.

[0034] 2. The processing technology of the GIS housing with a corner of the present invention can accurately and quickly splice the first main cylinder and the second main cylinder at the required angle through the structure of the welding tooling. It has strong applicability and can be applied to the precise docking of other GIS housings with corners of different specifications by replacing the angle clamping blocks with different lengths and angles, so as to facilitate high-precision welding work. Compared with the traditional method of manually adjusting the positions of the two toolings by the naked eye to achieve splicing, the error rate is greatly reduced.

[0035] 3. In the processing technology of the GIS housing with a corner of the present invention, through the scribing of the two hypotenuses of the scribing block, taking the center line of the first main cylinder as the reference, the center line of the second main cylinder can be scribed. Then, taking the center line of the second main cylinder as the reference, the boring machine can be controlled to find the central axis of the second main cylinder, so as to realize the precision machining of the outer circle and end face and other parts of the second cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is the finished product structure diagram in the processing technology of the GIS housing with a corner of the present invention;

[0038] Figure 2 It is the structural schematic diagram after installing the scribing tooling outside the first main cylinder in the processing technology of the GIS housing with a corner of the present invention;

[0039] Figure 3 It is the structural schematic diagram of the scribing tooling in the processing technology of the GIS housing with a corner of the present invention;

[0040] Figure 4 It is the structural schematic diagram of the first main cylinder and the second main cylinder after cutting in the processing technology of the GIS housing with a corner of the present invention;

[0041] Figure 5 It is the structural schematic diagram of the welding tooling in the processing technology of the GIS housing with a corner of the present invention;

[0042] Figure 6 It is the structural schematic diagram when the first main cylinder and the second main cylinder are installed on the welding tooling in the processing technology of the GIS housing with a corner of the present invention;

[0043] Figure 7It is a schematic structural diagram of installing a flange behind the flange in a processing technology of a GIS housing with a corner of the present invention;

[0044] Figure 8 It is a schematic structural diagram of installing a scribing block on the housing in a processing technology of a GIS housing with a corner of the present invention;

[0045] Figure 9 It is a schematic structural diagram of the scribing block in a processing technology of a GIS housing with a corner of the present invention;

[0046] Figure 10 It is a schematic structural diagram of installing the housing on a flange detection tooling and an auxiliary support seat in a processing technology of a GIS housing with a corner of the present invention;

[0047] Figure 11 It is a schematic structural diagram of the detection bar block in a processing technology of a GIS housing with a corner of the present invention;

[0048] Figure 12 It is a schematic structural diagram of the auxiliary support seat in a processing technology of a GIS housing with a corner of the present invention;

[0049] Figure 13 It is a schematic structural diagram of the internal mounting block tooling in a processing technology of a GIS housing with a corner of the present invention;

[0050] Figure 14 It is a schematic structural diagram of the mounting block arranged on the housing in a processing technology of a GIS housing with a corner of the present invention.

[0051] Main component symbol description

[0052] 10. First main cylinder; 20. Second main cylinder; 30. Scribing tooling; 31. Scribing ring; 40. Welding tooling; 41. First limit seat; 42. Second limit seat; 43. Angle clamping block; 44. Third limit seat; 50. Flange; 60. Scribing block; 61. Weld fixing groove; 70. Flange detection tooling; 80. Auxiliary support seat; 90. Detection bar block; 100. Internal mounting block tooling; 101. Positioning fixing disk; 102. Bent extension part; 103. Mounting block fixing ring; 110. Mounting block. Detailed implementation manners

[0053] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of 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 those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0054] A GIS shell processing technology with a corner includes the following steps:

[0055] S1: The first main barrel 10 is unloaded and fixed on the lathe for rough turning to a fixed length. When unloading the pipe, the unloading personnel must confirm that the pipe to be unloaded has no mechanical damage such as scratches and dents on its appearance. At the same time, it must be ensured that the straightness and roundness of the pipe to be unloaded meet the roundness tolerance requirements and straightness requirements. If the straightness and roundness do not meet the above requirements, the pipe to be unloaded must be calibrated on the calibration machine. Unloading can only be carried out after the calibration is qualified;

[0056] S2: Please refer to Figures 2 to 4 , one end of the first main cylinder 10 is fixed on the marking tool 30, and the other end can be fixed on the flange detection tool 70 described below, the marking tool 30 includes a marking ring 31, and the marking ring 31 includes a relative marking bevel and a calibration plane, so that one end face of the first main cylinder 10 is flush with the calibration plane, and the marking bevel is arranged around the first main cylinder 10, and a cutting line with an angle of α° with the end face is drawn along the marking bevel, and the first main cylinder 10 is cut along the cutting line to form a first cutting surface. The required cutting line can be quickly and accurately drawn through the cooperation of the marking bevel and the calibration plane, avoiding the technical problem of large errors caused by manual marking by human naked eye judgment;

[0057] S3: Referring to step S2, use the marking tool 30 to mark a cutting line with an angle of α° with the end surface on the second main tube 20, and cut the second main tube 20 along the cutting line to form a second cutting surface, such as Figure 4 As shown;

[0058] S4: Please refer to Figure 5 and Figure 6 , the first main cylinder 10 and the second main cylinder 20 are pre-positioned by welding tool 40, so that the angle between the central axes of the first main cylinder 10 and the second main cylinder 20 is 2α°, and the angle can be any angle required by the shell by controlling the angle value of α;

[0059] Furthermore, the welding tooling 40 includes a first limiting seat 41, a second limiting seat 42 and an angle clamping block 43. The first limiting seat 41 and the second limiting seat 42 are provided with a limiting block with an arc-shaped notch for positioning the first main cylinder 10 and the second main cylinder 20. Clamping grooves are formed on both the first limiting seat 41 and the second limiting seat 42 for clamping both ends of the angle clamping block 43 respectively, so that the included angle between the central axis of the first limiting seat 41 along the first main cylinder 10 and the central axis of the second limiting seat 42 along the second main cylinder 20 is 2α°. The clamping grooves are two limiting grooves formed on the base. The two clamping grooves on the first limiting seat 41 or the second limiting seat 42 are inclined at 2α° in the width direction, so that when the first limiting seat 41 and the second limiting seat 42 are connected by the angle clamping block 43, the included angle is 2α°, and at the same time, the length of the angle clamping block 43 can also be correspondingly set according to the installation distance between the first main cylinder 10 and the second main cylinder 20.

[0060] Through the structure of the welding tooling 40, the first main cylinder 10 and the second main cylinder 20 can be accurately and quickly spliced at the required angle. It has strong applicability. By replacing the angle clamping blocks 43 with different lengths and different angles, it can be applicable to the precise docking of other GIS shells with different specifications and corners, so as to facilitate high-precision welding work. Compared with the traditional method of manually adjusting the positions of the two toolings by the naked eye to achieve splicing, the error rate is greatly reduced.

[0061] Please refer to Figure 6 , the welding tooling 40 further includes at least one third limiting seat 44. The limiting block with an arc-shaped notch on the third limiting seat 44 is used to assist in supporting the first main cylinder 10 or the second main cylinder 20 with a longer length. At the same time, a flange 50 alignment hole can be formed on the limiting block of the third limiting seat 44. By passing a positioning pin through the flange 50 alignment hole and the fixing hole, the alignment and support of one end of the cylinder can be further carried out, and the accuracy and stability during welding can be further improved.

[0062] S5: Fit the first cutting surface and the second cutting surface tightly and perform welding so that the first main cylinder 10 and the second main cylinder 20 form a cylinder with a corner. The specific process of forming the shell includes the following operations: 1. Clean the weld bead: First, use a grinding machine to polish the weld bead until it shows metallic luster, and then clean it with acetone; 2. TIG manual welding; 3. After welding is completed, use a grinding machine to polish the weld seam and the surrounding 10MM range to remove black smoke and welding slag; 4. After welding, check the appearance of the weld seam. There should be no welding defects such as sand holes and incomplete welding; 5. After welding and cooling, perform non-destructive testing on the weld seam; 6. After welding, turn to grinding and grind the weld seam flat.

[0063] Through the above process, the process accuracy requirements after welding of the two main cylinders are ensured, and at the same time, basic conditions are provided for the subsequent operation of installing the scribing block 60 on the weld, facilitating the installation of the scribing block 60.

[0064] Please refer to Figure 7 , after any one of the steps S1 to S5, the following steps are further included:

[0065] SA: Provide at least one flange 50 for rough turning and opening fixing holes, and weld the flange 50 to the uncut end face of the first main cylinder 10 or / and the second main cylinder 20. By installing the flange 50, the connection and splicing between multiple shells are realized to meet the installation of high-voltage transmission lines with large spans.

[0066] Specifically, the following steps are further included in the S4 step: Provide two flanges 50 for rough turning and opening fixing holes, and weld the flanges 50 to the uncut end faces of the first main cylinder 10 and the second main cylinder 20 to form a GIS shell with a corner; Please refer to Figure 6 , a number of arc-shaped distribution limiting holes are opened on the flange 50 on the limiting block, and at least two positioning pins are inserted into the limiting holes and the fixing holes to realize the positioning between the flange 50 and the cylinder body, improving the accuracy and stability during welding.

[0067] Please refer to Figure 8 and Figure 9 , the following steps are further included after the S5 step:

[0068] S6: Install the scribing block 60 along the weld formed by welding the first cutting surface and the second cutting surface. The scribing block 60 includes at least two hypotenuses arranged parallel to the central axes of the first main cylinder 10 and the second main cylinder 20 respectively. The surface of the scribing block 60 in contact with the main cylinder is an arc surface and is provided with a weld fixing groove 61, and scribing is performed on the first main cylinder 10 and the second main cylinder 20 along the two hypotenuses.

[0069] Through the scribing of the two hypotenuses, with the center line of the first main cylinder 10 as the reference, the center line of the second main cylinder 20 can be scribed, and then with the center line of the second main cylinder 20 as the reference, the boring machine can be controlled to find the central axis of the second main cylinder 20, so as to realize the precision machining of the outer circle and end face and other parts of the second cylinder body.

[0070] Specifically, please refer to Figure 9, the scribing block 60 is in the shape of a right trapezoid, its inclined waist is parallel to the central axis of the first main cylinder 10, and its bottom side is parallel to the central axis of the second main cylinder 20. An auxiliary line is scribed along the bottom side at an angle of 2α° with the inclined waist. Since the length of the bottom side is longer than the top side, scribing the bottom side can perform a longer calibration with the main shaft of the boring machine, providing its calibration accuracy. At the same time, taking the flange 50 as the standard, the cross-center standard line of the housing is scribed along the entire circumference of the housing. Horizontal lines are drawn starting from the upper and lower endpoints, and the horizontal lines are extended to the edge of the cylinder to further calibrate the position of the auxiliary line.

[0071] Adopting the structure of the wire-hanging block, not only its manufacturing cost is low, but also its ingenious structure can effectively match the weld seam and the outer surface of the cylinder on the one hand, and can quickly calibrate the center line of the second main cylinder 20 on the other hand, and the function is easy to implement.

[0072] Furthermore, it includes the following steps:

[0073] S7: Correct the position of the boring machine main shaft and the auxiliary line to make them parallel, and adjust the height of the main shaft to coincide with the central axis of the second main cylinder 20. Start the boring machine to perform finish machining on the flange 50, and perform finish machining on the outer diameter, end face, R corner and other parameters of the flange 50 to ensure the dimensional requirements.

[0074] Please refer to Figures 10 to 12 , further including the following steps:

[0075] S8: Remove the housing from the boring machine. One end is supported and fixed to the first cylinder through the flange detection tooling 70, and the other end provides an auxiliary support seat 80 to support and fix the bottom of the second cylinder. The auxiliary support seat 80 includes two support rods with different heights for clamping and fixing the front and back sides of the flange 50. Then, a detection strip 90 is fixed to the flange 50. A center line is opened on the detection strip 90 to align with the auxiliary line. Thread holes and detection lines are opened on the detection block for installing the detection block to the flange 50 through the thread holes, and then check whether the detection line is flush with the center line to inspect the parameters of the finish-machined flange 50

[0076] Please refer to Figure 13 and Figure 14 , further including the following steps:

[0077] S9: Provide an internal installation block tooling 100. The internal installation block tooling 100 includes a positioning fixed disk 101, a bent extension part 102 and an installation block fixing ring 103. Connect and fix the positioning fixed disk 101 to the flange 50 on one side of the second cylinder. The bent extension part 102 includes two bent strips at an angle of 2α°. By splicing bent strips with different angles, the adaptation to GIS housings with different corner angles can be realized. A plurality of installation block 110 fixing stations are provided on the installation block fixing ring 103.

[0078] Since the GIS housing often needs to pre-install several mounting blocks 110 inside the cylinder to support the pot insulator, and there are tolerance requirements for the distance from the mounting position of the mounting block 110 to the flange 50 plate, and its position accuracy requirement is very high. The traditional riveting method is to mark manually inside the cylinder by visual inspection and then weld and install, with poor position accuracy, seriously affecting the overall use of the subsequent GIS housing.

[0079] Therefore, the position of the fixing hole on the flange 50 is matched with the hole position on the positioning fixing plate 101 to indirectly position the pre-positioning block position of the mounting block 110 on the mounting block fixing ring 103 through the existing hole positions on the flange 50 plate, so as to ensure the accurate fixing position of the final mounting block 110. The overall structure design is ingenious and simple, avoiding the insufficient accuracy caused by manual positioning and thus affecting the overall use of the final GIS housing.

[0080] Furthermore, a relief opening is provided in the middle of the positioning fixing plate 101 for allowing people to enter the inside of the GIS housing for operation, and a plurality of mounting block pre-positioning blocks are further provided on the outer side of the mounting block fixing ring 103 close to the inner wall of the GIS housing.

[0081] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A processing technology for a GIS housing with a corner, characterized in that, The following steps are involved: S1: The first main cylinder (10) is unloaded and fixed on a lathe for rough turning to a fixed length; S2: fixing the first main cylinder (10) on a marking tool (30), wherein the marking tool (30) comprises a marking ring (31), wherein the marking ring (31) comprises opposing marking slopes and a calibration plane, so that one end surface of the first main cylinder (10) is flush with the calibration plane, and the marking slope is arranged around the first main cylinder (10), a cutting line is drawn along the marking slope at an angle of α° to the end surface, and the first main cylinder (10) is cut along the cutting line to form a first cutting surface; S3: Referring to step S2, use a marking tool (30) to mark a cutting line on the second main tube (20) at an angle of α to the end surface, and cut the second main tube (20) along the cutting line to form a second cutting surface; S4: Pre-positioning the first main cylinder (10) and the second main cylinder (20) by means of a welding tool (40) so that the angle between the central axes of the first main cylinder (10) and the second main cylinder (20) is 2α°; S5: The first cutting surface and the second cutting surface are closely matched and welded to form a cylindrical body with a corner by the first main cylinder (10) and the second main cylinder (20); S6: A marking block (60) is installed along the weld formed by welding the first cutting surface and the second cutting surface, wherein the marking block (60) comprises at least two oblique edges which are respectively arranged parallel to the central axis of the first main cylinder (10) and the central axis of the second main cylinder (20), and the surface of the marking block (60) which is in close contact with the main cylinder is an arc surface and is provided with a weld fixing groove (61), and marking is performed on the first main cylinder (10) and the second main cylinder (20) along the two oblique edges.

2. The processing technology for a GIS housing with a corner according to claim 1, characterized in that, The S4 step specifically includes: the welding tool (40) includes a first limit seat (41), a second limit seat (42) and an angle clamping block (43); the first limit seat (41) and the second limit seat (42) are provided with a limit block with an arc notch for positioning the first main cylinder (10) and the second main cylinder (20); the first limit seat (41) and the second limit seat (42) are both provided with clamping grooves for respectively clamping the two ends of the angle clamping block (43), so that the angle between the first limit seat (41) along the central axis of the first main cylinder (10) and the second limit seat (42) along the central axis of the second main cylinder (20) is 2α°.

3. The processing technology for a GIS housing with a corner according to claim 2, characterized in that, After any one of the steps, the following steps are further included: SA: Provide at least one flange (50) for rough machining and opening of fixing holes, and weld the flange (50) to the uncut end surface of the first main cylinder (10) or / and the second main cylinder (20).

4. The processing technology for a GIS housing with a corner according to claim 3, characterized in that, The step S4 further comprises the following steps: providing two flanges (50) for rough turning and opening fixing holes, welding the flanges (50) to the uncut end faces of the first main cylinder (10) and the second main cylinder (20) to form a GIS shell with a corner; and opening a plurality of arc-shaped limiting holes on the limiting block of the flange (50), inserting at least two positioning pins into the limiting holes and the fixing holes to achieve positioning between the flange (50) and the cylinder.

5. The processing technology for a GIS housing with a corner according to claim 1, characterized in that: The scribing block (60) is in the shape of a right trapezoid, with its inclined waist parallel to the central axis of the first main cylinder (10) and its bottom side parallel to the central axis of the second main cylinder (20). An auxiliary line is scribed along the bottom side at an angle of 2α° with the inclined waist.

6. The processing technology for a GIS housing with a corner according to claim 5, characterized in that, The following steps are further included: S7: Calibrate the position of the boring machine spindle to be parallel to the auxiliary line, and adjust the spindle height to coincide with the central axis of the second main cylinder (20). Start the boring machine to perform finish machining on the flange (50).

7. The processing technology for a GIS housing with a corner according to claim 6, characterized in that, The following steps are further included: S8: Remove the housing from the boring machine. Support and fix one end of the first cylinder through the flange detection tooling (70), provide an auxiliary support seat (80) at the other end to support and fix the bottom of the second cylinder. Then fix a detection bar block (90) to the flange (50), and open a center line on the detection bar block (90) to align with the auxiliary line.

8. The processing technology for a GIS housing with a corner according to claim 7, characterized in that, The following steps are further included: S9: Provide an internal mounting block tooling (100). The internal mounting block tooling (100) includes a positioning fixed disk (101), a bent extension part (102), and a mounting block fixing ring (103). Connect and fix the positioning fixed disk (101) to the flange (50) on one side of the second cylinder. The bent extension part (102) includes two bent bars at an angle of 2α°. A plurality of mounting block (110) fixing stations are provided on the mounting block fixing ring (103).

9. The processing technology for a GIS housing with a corner according to claim 1, characterized in that: The welding tooling (40) further includes at least one third limit seat (44). The limit block with an arc notch on the third limit seat (44) is used to assist in supporting the relatively long first main cylinder (10) or second main cylinder (20).

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