Machining method of split casing

Abstract

The invention discloses a machining method of a split casing. The machining method comprises the following steps that (1) components are machined; 2) welding a support plate; 3) welding a horizontal flange; (4) the insert and the boss are welded; (5) linear cutting; (6) partition plate welding; (7) machining; and 8) spraying. According to the machining method, the forming quality of the split brake is ensured, and the machining qualification rate is greatly increased.

Description

Technical Field

[0001] The invention relates to the technical field of parts processing, and in particular to a processing method for a split casing. Background Art

[0002] like Figure 2-4 The split engine gate shown is an important component of the main power gas turbine, and its processing quality directly affects the performance of the main power gas turbine. The split engine gate has many components, the processing procedures are complicated, and the processing qualification rate is low. Therefore, a processing method for the split engine case is designed to ensure its processing quality and guarantee the processing qualification rate. Summary of the invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a processing method for a split casing, which ensures the molding quality of the split casing and greatly improves the processing qualification rate.

[0004] The present invention provides a processing method for a split casing, which comprises a coaxial inner cylinder and an outer cylinder; a plurality of support plates are circumferentially distributed between the inner cylinder and the outer cylinder; a top inner flange is arranged on the top of the inner cylinder, and a bottom inner flange is arranged on the bottom; a top outer flange is arranged on the top of the outer cylinder, and a bottom outer flange is arranged on the bottom; a plurality of bosses are circumferentially arranged near the top of the outer wall of the outer cylinder; the outer cylinder comprises a first half outer cylinder and a second half outer cylinder distributed symmetrically on the left and right, and the first half outer cylinder and the second half outer cylinder are fixedly connected by a horizontal flange; the inner cylinder comprises a first half inner cylinder and a second half inner cylinder distributed symmetrically with respect to a symmetric plane of the first half outer cylinder and the second half outer cylinder, a first partition is arranged near the second half outer cylinder between the first half outer cylinder and the first half inner cylinder on the same side, and a second partition is arranged near the first half outer cylinder between the second half outer cylinder and the second half inner cylinder on the same side; the processing method comprises the following steps:

[0005] 1) Component processing;

[0006] Machining the inner cylinder, the first half outer cylinder and the second half outer cylinder, wherein the top inner flange, the bottom inner flange, the top outer flange and the bottom outer flange have margins in thickness and radial direction;

[0007] 2) Welding support plate;

[0008] The inner cylinder, the first half outer cylinder and the second half outer cylinder are positioned and fixed by the positioning tool, and the inner cylinder and the first half outer cylinder and the second half outer cylinder are supported; during the positioning and fixing process, each support plate is installed between the inner cylinder and the first half outer cylinder and the second half outer cylinder; then each support plate is welded one by one, and heat treated after welding to eliminate stress;

[0009] 3) Welding horizontal flange;

[0010] The excess on the top surface of the top outer flange is removed by turning, and positioning marks are made on the top surfaces of the top inner flange and the top outer flange; the first process block is welded at the top and bottom between the first half outer cylinder and the second half outer cylinder; the inner cylinder body and the outer cylinder body are then fixed and clamped by a clamping tool, and welding windows are respectively milled on both sides between the first half outer cylinder and the second half outer cylinder based on the positioning marks;

[0011] A notch is milled on the outer side of the top of any horizontal flange, and then the two horizontal flanges are aligned and a number of second process blocks are welded on both sides and the bottom, and the first support rods are respectively welded in the inner cylinder and between the inner cylinder and the outer cylinder. The first support rods are distributed on the symmetry plane and are located at the top and bottom of the double-opening machine gate; the two horizontal flanges are welded to the first half outer cylinder and the second half outer cylinder in a one-to-one correspondence in the welding window, and heat treatment is performed after welding to eliminate welding stress;

[0012] 4) Welding inserts and bosses;

[0013] Taking the notch on the horizontal flange as a reference, positioning holes corresponding to the bosses are milled on the side wall of the outer cylinder, and the bosses are welded to the corresponding positioning holes one by one; an upper insert is placed between the top end of the horizontal flange and the corresponding top outer flange and welded together, and a lower insert is placed between the bottom end of the horizontal flange and the corresponding bottom outer flange and welded together;

[0014] 5) Wire cutting;

[0015] The second support rods are welded in the inner cylinder and between the inner cylinder and the outer cylinder respectively, and the second support rods are symmetrically distributed on both sides of the symmetry plane and located at the top and bottom of the double-opening machine gate; the excess of the bottom inner flange and the bottom outer flange bottom surface are removed by turning; the inner cylinder is wire-cut along the symmetry plane to decompose it into the first half inner cylinder and the second half inner cylinder; then the first process block and the second process block are removed by grinding;

[0016] 6) Welding partitions;

[0017] Milling a partition groove between the first half inner cylinder and the first half outer cylinder, and between the second half inner cylinder and the second half outer cylinder, grinding each partition groove, placing the first partition and the second partition into the corresponding partition grooves respectively and welding them together, and performing heat treatment after welding to eliminate welding stress;

[0018] 7) Machining;

[0019] Remove the second support rod, mill the joint surface between the first half inner cylinder, the first half outer cylinder and the second half inner cylinder, the second half outer cylinder, and the through hole on the horizontal flange; fix the corresponding horizontal flanges with bolts; fix the split machine gate with a clamping fixture, and roughly turn the allowance of each part, leaving a margin of 0.5-1.5mm; let it stand for 60-72 hours to release the residual machine stress; fine turn the allowance of each part of the split machine gate, and fine mill the boss and profile; drill and bore the end holes on the top inner flange, the top outer flange and the bottom outer flange; benchwork deburrs and taps the end holes;

[0020] 8) Spraying: spray a protective coating on the outer surface of the double-opening machine gate.

[0021] Furthermore, in the step 1), the thickness reserve margin of the top inner flange, the bottom inner flange, the top outer flange and the bottom outer flange is 8-10 mm, and the radial reserve margin is 4-5 mm.

[0022] Furthermore, the positioning tooling includes:

[0023] A first bottom plate, the top surface of which is provided with an inner positioning step and an outer positioning step, the outer diameter of the inner positioning step is in clearance with the inner diameter of the bottom inner flange, and the inner diameter of the outer positioning step is in clearance with the outer diameter of the bottom outer flange;

[0024] A support assembly, comprising a plurality of support plates fixedly disposed on the top surface of the first bottom plate, wherein the plurality of support plates are uniformly distributed between the inner positioning step and the outer positioning step along the circumferential direction;

[0025] A first fixing assembly includes a plurality of first pressing plates evenly distributed on the inner circumference above the inner positioning step, one end of the first pressing plate is pressed on the inner flange at the bottom end, a first pad is provided at the bottom of the other end, and the first pressing plate is connected to the inner positioning step by a first screw;

[0026] The second fixing assembly includes a plurality of second pressure plates evenly distributed on the outer periphery above the outer positioning step, one end of the second pressure plate is pressed on the bottom outer flange, and a second pad is provided at the bottom of the other end. The second pressure plate is connected to the outer positioning step by a second screw.

[0027] Furthermore, the positioning mark includes a line and a reference hole; the top surface of the top outer flange is symmetrically provided with the line on both sides of the symmetry plane; the top surfaces of the top inner flange and the top outer flange are respectively provided with the reference holes on the symmetry plane.

[0028] Furthermore, the clamping tool comprises:

[0029] A second bottom plate, the top surface of which is provided with a positioning step, the outer diameter of the positioning step is in clearance with the inner diameter of the bottom inner flange, and lower avoidance grooves are symmetrically provided on both sides of the second bottom plate;

[0030] A fixing assembly includes a cover plate and a pull rod, wherein the cover plate is arranged above the second base plate, upper avoidance grooves are opened on both sides of the cover plate corresponding to the lower avoidance grooves, and the top surface of the second base plate is located on the outer periphery of the positioning step and a plurality of pull rods are evenly distributed, the top end of the pull rod slides through the cover plate and is threadedly connected with a nut, and a disc spring is arranged between the nut and the cover plate.

[0031] Furthermore, a margin of 8-10 mm is reserved on a side of the first partition plate and a side of the second partition plate close to the symmetric plane.

[0032] Furthermore, in step 7), the bonding surfaces are ground and color checked to ensure that the alignment and fit of the bonding surfaces is higher than 95%; and the gap between the bonding surfaces is detected by a feeler gauge to ensure that there is no penetrating gap.

[0033] Furthermore, the coating includes a water-based high temperature resistant paint coating and a sealing coating, and the thickness of the coating is 30-60um.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] The processing method of the present invention is used to process and shape the double-opening machine gate. First, the inner cylinder, the first half outer cylinder and the second half outer cylinder with a margin of flange are machined; then the positioning tool is used to position and complete the welding of the support plate to ensure the welding accuracy of the support plate; then the clamping tool is used to clamp and open the welding window, and then the horizontal flanges are welded to ensure the welding accuracy of the horizontal flanges; then the inserts and bosses are welded according to the reference; then the inner cylinder is decomposed into the first half inner cylinder and the second half inner cylinder by wire cutting, and then the partition is welded; then the structural features of the double-opening machine gate are machined, and then the spraying treatment is completed. The processing method of the present application ensures the molding quality of the double-opening machine gate and greatly improves the processing qualification rate.

[0036] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0038] Figure 1 A flow chart of a method for processing a split receiver;

[0039] Figure 2 It is a schematic diagram of the structure of the split receiver;

[0040] Figure 3 It is a schematic diagram of the cross-sectional structure of the split receiver;

[0041] Figure 4 It is a schematic diagram of the structure in which the first half inner cylinder and the first half outer cylinder of the opening machine brake are separated from the second half inner cylinder and the second half outer cylinder;

[0042] Figure 5 It is a structural schematic diagram of the positioning tooling;

[0043] Figure 6 It is a structural diagram of the installation of the double-opening machine gate on the positioning tooling;

[0044] Figure 7 It is a schematic diagram of the cross-sectional structure of the double-opening machine gate installed on the positioning tooling;

[0045] Figure 8 It is a schematic diagram of the position of the positioning mark on the opening gate;

[0046] Fig. 9 It is a structural schematic diagram of the clamping tooling;

[0047] Fig.10 It is a structural schematic diagram of a welding window for a split casing;

[0048] Fig.11 This is a schematic diagram of the structure of welding horizontal flanges on split casings;

[0049] Fig.12 It is a schematic diagram of the placement position of the upper insert and the lower insert.

[0050] Numbers in the figure: 1, split casing; 2, positioning tool; 3, clamping tool; 4, first process block; 5, welding window; 6, second process block; 7, first support rod; 8, second support rod; 9, positioning mark;

[0051] 11. first half inner tube; 12. second half inner tube; 13. first half outer tube; 14. second half outer tube; 15. support plate; 16. top inner flange; 17. bottom inner flange; 18. top outer flange; 19. bottom outer flange; 110. boss; 111. horizontal flange; 112. first baffle; 113. second baffle; 114. notch; 115. positioning hole; 116. upper insert; 117. lower insert; 118. end hole;

[0052] 21. first bottom plate; 22. inner positioning step; 23. outer positioning step; 24. support plate; 25. first pressing plate; 26. first cushion block; 27. first screw; 28. second pressing plate; 29. ​​second cushion block; 210. second screw;

[0053] 31. Second bottom plate; 32. Positioning step; 33. Lower avoidance groove; 34. Cover plate; 35. Pull rod; 36. Upper avoidance groove; 37. Nut; 38. Disc spring;

[0054] 91. Marking; 92. Reference hole. DETAILED DESCRIPTION

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0056] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] Please refer to Figures 1 to 12 The embodiment of the present invention provides a processing method for a split receiver, wherein the split receiver 1 comprises a coaxial inner cylinder and an outer cylinder; a plurality of support plates 15 are circumferentially distributed between the inner cylinder and the outer cylinder; a top inner flange 16 is provided at the top of the inner cylinder, and a bottom inner flange 17 is provided at the bottom; a top outer flange 18 is provided at the top of the outer cylinder, and a bottom outer flange 19 is provided at the bottom; a plurality of bosses 110 are circumferentially provided near the top of the outer wall of the outer cylinder; the outer cylinder comprises a first half outer cylinder 13 and a second half outer cylinder 13 symmetrically distributed on the left and right. 14, the first half outer cylinder 13 and the second half outer cylinder 14 are fixedly connected by a horizontal flange 111; the inner cylinder body comprises a first half inner cylinder 11 and a second half inner cylinder 12 symmetrically distributed on the symmetry plane of the first half outer cylinder 13 and the second half outer cylinder 14, a first baffle 112 is arranged between the first half outer cylinder 13 and the first half inner cylinder 11 on the same side near the second half outer cylinder 14, and a second baffle 113 is arranged between the second half outer cylinder 14 and the second half inner cylinder 12 on the same side near the first half outer cylinder 13; the processing method comprises the following steps:

[0058] 1) Component processing;

[0059] The inner cylinder, the first half outer cylinder 13 and the second half outer cylinder 14 are machined, wherein the top inner flange 16, the bottom inner flange 17, the top outer flange 18 and the bottom outer flange 19 are reserved with allowances in thickness and radial direction;

[0060] 2) Welding the support plate 15;

[0061] The inner cylinder, the first half outer cylinder 13 and the second half outer cylinder 14 are positioned and fixed by the positioning tool 2, and the inner cylinder and the first half outer cylinder 13 and the second half outer cylinder 14 are supported; during the positioning and fixing process, each support plate 15 is installed between the inner cylinder and the first half outer cylinder 13 and the second half outer cylinder 14; then, each support plate 15 is welded one by one, and heat-treated after welding to eliminate stress;

[0062] 3) welding horizontal flange 111;

[0063] The excess on the top surface of the top outer flange 18 is removed by turning, and positioning marks 9 are made on the top surfaces of the top inner flange 16 and the top outer flange 18; the first process block 4 is welded at the top and bottom between the first half outer cylinder 13 and the second half outer cylinder 14; the inner cylinder body and the outer cylinder body are then fixedly clamped by the clamping tool 3, and the welding windows 5 are respectively milled on both sides between the first half outer cylinder 13 and the second half outer cylinder 14 based on the positioning marks 9;

[0064] A notch 114 is milled on the outer side of the top of any horizontal flange 111, and then the two horizontal flanges 111 are aligned and a number of second process blocks 6 are welded on both sides and the bottom, and first support rods 7 are welded in the inner cylinder and between the inner cylinder and the outer cylinder respectively. The first support rods 7 are distributed on the symmetry plane and are located at the top and bottom of the double-opening machine gate 1; the two horizontal flanges 111 are welded and connected with the first half outer cylinder 13 and the second half outer cylinder 14 in a one-to-one correspondence in the welding window 5, and heat treatment is performed after welding to eliminate welding stress;

[0065] 4) welding the insert and the boss 111;

[0066] Taking the notch 114 on the horizontal flange 111 as a reference, positioning holes 115 corresponding to the bosses 110 are milled on the side wall of the outer cylinder, and the bosses 110 are welded to the corresponding positioning holes 115 one by one; an upper insert 116 is placed between the top end of the horizontal flange 111 and the corresponding top end outer flange 18 and welded, and a lower insert 117 is placed between the bottom end of the horizontal flange 111 and the corresponding bottom end outer flange 19 and welded;

[0067] 5) Wire cutting;

[0068] The second support rods 8 are welded in the inner cylinder and between the inner cylinder and the outer cylinder respectively. The second support rods 8 are symmetrically distributed on both sides of the symmetry plane and are located at the top and bottom of the double-opening machine gate 1; the margins of the bottom inner flange 17 and the bottom outer flange 19 are removed by turning; the inner cylinder is wire-cut along the symmetry plane to decompose it into the first half inner cylinder 11 and the second half inner cylinder 12; and then the first process blocks 4 and the second process blocks 6 are removed by grinding;

[0069] 6) Welding partitions;

[0070] Milling and processing partition grooves between the first half inner cylinder 11 and the first half outer cylinder 13, and between the second half inner cylinder 12 and the second half outer cylinder 14, grinding each partition groove, placing the first partition 112 and the second partition 113 in the corresponding partition grooves respectively and welding them together, and performing heat treatment after welding to eliminate welding stress;

[0071] 7) Machining;

[0072] Remove the second support rod 8, mill the joint surface between the first half inner cylinder 11, the first half outer cylinder 13 and the second half inner cylinder 12, the second half outer cylinder 14, and the through hole on the horizontal flange 111; fix the corresponding horizontal flange 111 by bolts; fix the split machine gate 1 by the clamping tool 3, and roughly turn the allowance of each part, leaving a margin of 0.5-1.5mm; let it stand for 60-72 hours to release the residual machine stress; fine turn the allowance of each part of the split machine gate 1, and fine mill the boss 110 and the profile; drill and bore the end holes 118 on the top inner flange 16, the top outer flange 18 and the bottom outer flange 19; deburr and tap the end holes 118 by benchwork;

[0073] 8) Spraying: spraying a protective coating on the outer surface of the double-opening machine gate 1.

[0074] In this embodiment, when the split gate 1 is machined, the inner cylinder body, the first half outer cylinder 13 and the second half outer cylinder 14 with a margin left by the flange are first machined; the reserved margin is subsequently machined away to offset the slight deformation caused during the machining process;

[0075] Then, the support plate 15 is positioned and welded by the positioning tool 2 to ensure the welding accuracy of the support plate 15; then the first process block 4 is welded to strengthen the structure to reduce deformation after subsequent window opening; at this time, the first support rods 7 are welded at the top and bottom of the double-opening machine gate 1 to form a support in the double-opening machine gate 1, which can effectively prevent the problem of shrinkage and deformation of parts when welding the horizontal flange 111, thereby ensuring the welding quality; then, the clamping tool 3 is used to clamp and open the welding window 5, and then the horizontal flanges 111 are welded; the horizontal flange 111 is a long plate-shaped connecting piece, on which a through hole is provided for bolts to fix and connect the two components; the two horizontal flanges 111 are fixed together and aligned by the second process block 6, thereby ensuring the welding quality and accuracy of the horizontal flange 111;

[0076] Then, the upper insert 116 and the lower insert 117 are welded according to the reference, and the gaps between the horizontal flange 111 and the top outer flange 18 and the bottom outer flange 19 are filled; then, the positioning hole 115 is opened and the boss 110 is welded, so as to ensure the welding accuracy of the boss 110;

[0077] Then, the second support rods 8 are welded at the top and bottom of both sides of the symmetry plane to support the inside of the split gate 1, so as to prevent the split gate 1 from deforming due to lack of internal support after being separated by wire cutting; at this time, the inner cylinder is decomposed by wire cutting to form the first half inner cylinder 11 and the second half inner cylinder 12; then, the partition is welded, and the partition supports the inner side of the split gate 1, and the second support rods 8 can be removed; finally, the structural features of the split gate 1 are machined and sprayed. The processing method of the present application ensures the molding quality of the split gate 1 and greatly improves the processing qualification rate.

[0078] In a preferred embodiment, in step 1), the thickness reserve margin of the top inner flange 16, the bottom inner flange 17, the top outer flange 18 and the bottom outer flange 19 is 8-10 mm, and the radial reserve margin is 4-5 mm. The reserve margin is suitable, and after machining, the slight deformation of the parts can be effectively offset.

[0079] In a preferred embodiment, if Figure 5 to Figure 7 As shown, the positioning tool 2 includes:

[0080] The first bottom plate 21 has an inner positioning step 22 and an outer positioning step 23 on its top surface. The outer diameter of the inner positioning step 22 is in clearance with the inner diameter of the bottom inner flange 17, and the inner diameter of the outer positioning step 23 is in clearance with the outer diameter of the bottom outer flange 19;

[0081] A support assembly, comprising a plurality of support plates 24 fixedly disposed on the top surface of the first bottom plate 21, wherein the plurality of support plates 24 are uniformly distributed between the inner positioning step 22 and the outer positioning step 23 along the circumferential direction;

[0082] The first fixing assembly includes a plurality of first pressing plates 25 evenly distributed on the inner circumference above the inner positioning step 22, one end of the first pressing plate 25 is pressed on the bottom inner flange 17, and a first cushion block 26 is provided at the bottom of the other end. The first pressing plate 25 is connected to the inner positioning step 22 by a first screw 27;

[0083] The second fixing assembly includes a plurality of second pressure plates 28 evenly distributed on the outer periphery above the outer positioning step 23. One end of the second pressure plate 28 is pressed on the bottom outer flange 19, and a second pad 29 is provided at the bottom of the other end. The second pressure plate 28 is connected to the outer positioning step 23 by a second screw 210.

[0084] In this embodiment, when welding the support plate 15, first, the inner cylinder is buckled on the inner positioning step 22, and then the bottom inner flange 17 is pressed and fixed by the first pressing plate 25; then the support plate 15 is assembled to one side of the inner cylinder, and the bottom outer flange 19 of the first outer cylinder 13 is embedded in the outer positioning step 23, and then the support plate 15 and the second outer cylinder 14 on the other side are arranged; then the bottom outer flange 19 is pressed and fixed by the second pressing plate 28, and then the support plate 15 can be welded and connected, and the positioning is accurate, ensuring the welding quality of the support plate 15.

[0085] In a preferred embodiment, if Figure 8 As shown, the positioning mark 9 includes a line 91 and a reference hole 92; the top surface of the top outer flange 18 is symmetrically provided with a line 91 on both sides of the symmetry plane; the top surface of the top inner flange 16 and the top outer flange 18 are respectively provided with a reference hole 92 on the symmetry plane, which serves as a reference for subsequent window opening, ensuring the positioning accuracy of the welding window 5 processing.

[0086] In a preferred embodiment, if Fig. 9 and Fig.10 As shown, the clamping tool 3 includes:

[0087] The second bottom plate 31 has a positioning step 32 on its top surface, the outer diameter of the positioning step 32 is clearance-matched with the inner diameter of the bottom inner flange 17, and lower avoidance grooves 33 are symmetrically opened on both sides of the second bottom plate 31;

[0088] The fixing assembly includes a cover plate 34 and a pull rod 35. The cover plate 34 is arranged above the second bottom plate 31. Upper avoidance grooves 36 are opened on both sides of the cover plate 34 corresponding to the lower avoidance grooves 33. The top surface of the second bottom plate 31 is located on the outer periphery of the positioning step 32 and is evenly distributed with a plurality of pull rods 35. The top end of the pull rod 35 slides through the cover plate 34 and is threadedly connected with a nut 37. A disc spring sheet 38 is arranged between the nut 37 and the cover plate 34.

[0089] In this embodiment, when welding the horizontal flange 111, first, the bottom inner flange 17 is placed on the positioning step 32 for positioning; then, the double-opening machine gate 1 is rotated to align the welding window 5 with the lower avoidance groove 33 and the upper avoidance groove 36, and then the cover plate 34 is buckled on the top of the double-opening machine gate 1 and locked and fixed by the nut 37, and the disc spring 38 ensures the fixing effect of the nut 37.

[0090] In a preferred embodiment, a margin of 8-10 mm is reserved on the side close to the symmetry plane of the first partition plate 112 and the second partition plate 113. When machining the joint surface, removing the margin can effectively eliminate the slight deformation caused by welding.

[0091] In a preferred embodiment, in step 7), the mating surfaces are ground and color checked to ensure that the alignment of the mating surfaces is higher than 95%; the gap between the mating surfaces is checked by a feeler gauge to ensure that there is no through gap. The parts are inspected to ensure their processing quality.

[0092] In a preferred embodiment, the coating includes a water-based high temperature resistant paint coating and a sealing coating, and the thickness of the coating is 30-60 um.

[0093] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0094] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for processing a split casing, the split casing (1) comprising a coaxial inner cylinder and an outer cylinder; a plurality of support plates (15) are circumferentially distributed between the inner cylinder and the outer cylinder; a top inner flange (16) is provided at the top of the inner cylinder, and a bottom inner flange (17) is provided at the bottom; a top outer flange (18) is provided at the top of the outer cylinder, and a bottom outer flange (19) is provided at the bottom; a plurality of bosses (110) are circumferentially provided near the top of the outer wall of the outer cylinder; the outer cylinder comprises a first half outer cylinder (13) and a second half outer cylinder (14) which are symmetrically distributed on the left and right sides, the first half outer cylinder The first half outer cylinder (13) and the second half outer cylinder (14) are fixedly connected by a horizontal flange (111); the inner cylinder body comprises a first half inner cylinder (11) and a second half inner cylinder (12) symmetrically distributed on a symmetric plane of the first half outer cylinder (13) and the second half outer cylinder (14); a first partition plate (112) is arranged between the first half outer cylinder (13) and the first half inner cylinder (11) on the same side near the second half outer cylinder (14); a second partition plate (113) is arranged between the second half outer cylinder (14) and the second half inner cylinder (12) on the same side near the first half outer cylinder (13); characterized in that: The processing method comprises the following steps: 1) Component processing; The inner cylinder, the first half outer cylinder (13) and the second half outer cylinder (14) are machined, wherein the top inner flange (16), the bottom inner flange (17), the top outer flange (18) and the bottom outer flange (19) are reserved with allowances in thickness and radial direction; 2) Welding the support plate (15); The inner cylinder, the first half outer cylinder (13) and the second half outer cylinder (14) are positioned and fixed by a positioning tool (2), and the inner cylinder and the first half outer cylinder (13) and the second half outer cylinder (14) are supported; during the positioning and fixing process, each support plate (15) is installed between the inner cylinder and the first half outer cylinder (13) and the second half outer cylinder (14); then, each support plate (15) is welded one by one, and after welding, it is subjected to heat treatment to eliminate stress; 3) Welding horizontal flange (111); The excess on the top surface of the top outer flange (18) is removed by turning, and positioning marks (9) are made on the top surfaces of the top inner flange (16) and the top outer flange (18); the first process block (4) is welded at the top and bottom between the first half outer cylinder (13) and the second half outer cylinder (14); the inner cylinder body and the outer cylinder body are then fixedly clamped by a clamping tool (3), and welding windows (5) are respectively milled on both sides between the first half outer cylinder (13) and the second half outer cylinder (14) based on the positioning marks (9); A notch (114) is milled on the outer side of the top of any horizontal flange (111), and then the two horizontal flanges (111) are aligned and a plurality of second process blocks (6) are welded on both sides and the bottom, and first support rods (7) are respectively welded inside the inner cylinder and between the inner cylinder and the outer cylinder. The first support rods (7) are distributed on the symmetry plane and are located at the top and bottom of the double-opening machine gate (1); the two horizontal flanges (111) are welded and connected to the first half outer cylinder (13) and the second half outer cylinder (14) in a one-to-one correspondence in the welding window (5), and heat treatment is performed after welding to eliminate welding stress; 4) Welding the insert and the boss (110); Taking the notch (114) on the horizontal flange (111) as a reference, positioning holes (115) corresponding to the bosses (110) are milled on the side wall of the outer cylinder, and the bosses (110) are welded to the corresponding positioning holes (115) one by one; an upper insert (116) is arranged between the top end of the horizontal flange (111) and the corresponding top end outer flange (18) and welded to each other; and a lower insert (117) is arranged between the bottom end of the horizontal flange (111) and the corresponding bottom end outer flange (19) and welded to each other; 5) Wire cutting; A second support rod (8) is welded inside the inner cylinder and between the inner cylinder and the outer cylinder respectively, and the second support rod (8) is symmetrically distributed on both sides of the symmetry plane and located at the top and bottom of the split machine gate (1); the excess of the bottom inner flange (17) and the bottom outer flange (19) are removed by turning; the inner cylinder is wire cut along the symmetry plane to decompose it into a first half inner cylinder (11) and a second half inner cylinder (12); and then the first process block (4) and the second process block (6) are removed by grinding; 6) Welding partitions; Milling a partition groove between the first half inner cylinder (11) and the first half outer cylinder (13), and between the second half inner cylinder (12) and the second half outer cylinder (14), grinding each partition groove, placing the first partition (112) and the second partition (113) in the corresponding partition grooves and welding them, and performing heat treatment after welding to eliminate welding stress; 7) Machining; Remove the second support rod (8), mill the joint surfaces between the first half inner cylinder (11), the first half outer cylinder (13) and the second half inner cylinder (12), the second half outer cylinder (14), and the through hole on the horizontal flange (111); fix the corresponding horizontal flange (111) by bolts; fix the split machine gate (1) by a clamping tool (3), and roughly turn the allowance of each part, leaving a margin of 0.5-1.5 mm; let it stand for 60-72 hours to release the residual machine stress; fine turn the allowance of each part of the split machine gate (1), and fine mill the boss (110) and the profile; drill and bore the end holes (118) on the top inner flange (16), the top outer flange (18) and the bottom outer flange (19); remove burrs by benchwork and tap the end holes (118); 8) Spraying: spraying a protective coating on the outer surface of the double-opening machine gate (1).

2. The processing method of the split receiver according to claim 1, characterized in that: In the step 1), the thickness reserve margin of the top inner flange (16), the bottom inner flange (17), the top outer flange (18) and the bottom outer flange (19) is 8-10 mm, and the radial reserve margin is 4-5 mm.

3. The processing method of the split receiver according to claim 1, characterized in that: The positioning tool (2) comprises: A first bottom plate (21), the top surface of which is provided with an inner positioning step (22) and an outer positioning step (23), the outer diameter of the inner positioning step (22) being in clearance with the inner diameter of the bottom inner flange (17), and the inner diameter of the outer positioning step (23) being in clearance with the outer diameter of the bottom outer flange (19); A support assembly, comprising a plurality of support plates (24) fixedly arranged on the top surface of the first bottom plate (21), wherein the plurality of support plates (24) are evenly distributed between the inner positioning step (22) and the outer positioning step (23) along the circumferential direction; A first fixing assembly comprises a plurality of first pressing plates (25) uniformly distributed on the inner circumference above the inner positioning step (22), one end of the first pressing plate (25) is pressed on the bottom inner flange (17), and a first cushion block (26) is arranged at the bottom of the other end, and the first pressing plate (25) is connected to the inner positioning step (22) by a first screw (27); The second fixing assembly includes a plurality of second pressure plates (28) evenly distributed on the outer periphery above the outer positioning step (23), one end of the second pressure plate (28) is pressed on the bottom outer flange (19), and a second cushion block (29) is provided at the bottom of the other end. The second pressure plate (28) is connected to the outer positioning step (29) by a second screw (210).

4. The processing method of the split receiver according to claim 1, characterized in that: The positioning mark (9) includes a scribe line (91) and a reference hole (92); the top surface of the top outer flange (18) is symmetrically provided with the scribe line (91) on both sides of the symmetric plane; the top surfaces of the top inner flange (16) and the top outer flange (18) are respectively provided with the reference holes (92) on the symmetric plane.

5. The method for processing a split receiver according to claim 1, characterized in that: The clamping tool (3) comprises: A second bottom plate (31), the top surface of which is provided with a positioning step (32), the outer diameter of the positioning step (32) being in clearance with the inner diameter of the bottom inner flange (17), and lower avoidance grooves (33) being symmetrically provided on both sides of the second bottom plate (31); A fixing assembly comprises a cover plate (34) and a pull rod (35), wherein the cover plate (34) is arranged above the second bottom plate (31), upper avoidance grooves (36) are provided on both sides of the cover plate (34) corresponding to the lower avoidance grooves (33), the top surface of the second bottom plate (31) is located on the periphery of the positioning step (32) and a plurality of pull rods (35) are evenly distributed, the top end of the pull rod (35) slides through the cover plate (34) and is threadedly connected with a nut (37), and a disc spring sheet (38) is provided between the nut (37) and the cover plate (34).

6. The processing method of the split receiver according to claim 1, characterized in that: A margin of 8-10 mm is reserved on the side of the first partition plate (112) and the side of the second partition plate (113) close to the symmetric plane.

7. The method for processing a split receiver according to claim 1, characterized in that: In the step 7), the bonding surfaces are ground and color checked to ensure that the alignment and fit of the bonding surfaces is higher than 95%; the gap between the bonding surfaces is detected by a feeler gauge to ensure that there is no penetrating gap.

8. The method for processing a split receiver according to claim 1, characterized in that: The coating comprises a water-based high temperature resistant paint coating and a sealing coating, and the thickness of the coating is 30-60um.

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