A thin-walled parts deformation control and shape correction device

Abstract

The utility model provides a thin-walled part deformation control and shape correction device, comprising a lower base plate, a central connecting shaft, an upper pressure piece, an upper cover plate and a fastening connecting piece, the upper surface of the lower base plate protrudes upward and is provided with an inner cylinder support part and an outer cylinder support part, the outer cylinder support part is arranged around the outer periphery of the inner cylinder support part; the lower end of the first part is sleeved on the inner cylinder support part; the lower end of the second part is sleeved on the outer cylinder support part; the lower end surface of the first part presses against the surface where the inner cylinder support part is located, and the lower end surface of the second part presses against the surface where the outer cylinder support part is located; one end of the central connecting shaft is connected to the center of the inner cylinder support part, and the other end is connected to the upper pressure piece; the upper pressure piece can move along the central axis of the central connecting shaft to press against the first part; the fastening connecting piece is arranged on the outside of the outer cylinder support part, one end of the fastening connecting piece is connected to the lower base plate, and the other end is connected to the upper cover plate, and the fastening connecting piece is used to fix the second part located between the upper cover plate and the outer cylinder support part.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding tooling for high-temperature alloy thin-walled parts, and in particular relates to a deformation control and shape correction device for thin-walled parts. Background Art

[0002] High-temperature alloy thin-walled sheet metal parts used in the aerospace field are core parts of engines. The parts include an outer cylinder, an annular top plate and an inner cylinder, wherein both the outer cylinder and the inner cylinder are cylindrical structures, the upper end diameter of the outer cylinder is larger than the lower end diameter, the outer cylinder is sleeved on the inner cylinder, and the outer cylinder and the inner cylinder are coaxially arranged, and the upper end of the outer cylinder and the upper end of the inner cylinder are connected via the annular top plate.

[0003] Since the aerospace high temperature alloy thin-walled parts are welded by the outer cylinder, the annular top plate and the inner cylinder, the above three parts will be severely bent and twisted during the welding process, and there will be dimensional deviation after welding.

[0004] In particular, the coaxiality requirements for the outer and inner cylinders in this part are high. After welding, severe bending and twisting deformations and overall axial deformation will occur, making it difficult to ensure the final size requirements. The overall axial deformation of the above-mentioned parts refers to the relative position of the outer and inner cylinders along the central axis, and the deformation caused by welding the outer and inner cylinders. Although conventional tooling can ensure the coaxiality of the two, there is a stress concentration problem after welding, which leads to stress release after the parts are disassembled, and axial deformation of the outer and inner cylinders.

[0005] During welding, if there is no tooling to control the deformation of the parts, the parts will be greatly deformed after welding and the parts will not meet the qualification requirements.

[0006] Conventional technical means are to correct and reshape the parts after welding. There are correction marks on the surface of the corrected parts, the appearance quality is poor, the springback of high-temperature alloy thin-walled parts is large, and the axial deformation is difficult to correct, resulting in a high scrap rate of parts. Due to the large size of the parts, the material and processing costs are relatively high, the production cycle is long, and the scrapping of parts will greatly increase the production cost. Utility Model Content

[0007] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a thin-walled parts deformation control and shape correction device, which can ensure the coaxiality and axial deformation of the parts, and achieve the effect of controlling the deformation of the parts after welding.

[0008] To achieve this purpose, the utility model adopts the following technical solutions:

[0009] A thin-walled parts deformation control and shape correction device, comprising a lower base plate, a central connecting shaft, an upper pressing piece, an upper cover plate and a fastening connecting piece;

[0010] The upper surface of the lower base plate is upwardly protruding and provided with an inner tube support portion and an outer tube support portion, wherein the outer tube support portion is arranged around the outer periphery of the inner tube support portion;

[0011] The lower end of the first part is sleeved on the inner tube support part, and the inner tube support part is used to support and position the first part; the lower end of the second part is sleeved on the outer tube support part, and the outer tube support part is used to support and position the second part, and the second part is sleeved on the outer periphery of the first part;

[0012] The lower end surface of the first part is pressed against the surface where the inner tube support portion is located, and the lower end surface of the second part is pressed against the surface where the outer tube support portion is located;

[0013] One end of the central connecting shaft is connected to the center of the inner cylinder support portion, and the other end is connected to the upper pressing member;

[0014] The upper pressing member can move along the central axis of the central connecting shaft to press against the first part;

[0015] The fastening connector is arranged on the outside of the outer cylinder support portion, one end of the fastening connector is connected to the lower base plate, and the other end is connected to the upper cover plate, and the fastening connector is used to fix the second part located between the upper cover plate and the outer cylinder support portion;

[0016] The upper cover plate and the upper pressing member are both made of red copper.

[0017] Preferably, the second part comprises an outer cylinder and an annular top plate, the lower bottom surface of the upper cover plate is provided with a positioning groove, and the top end of the annular top plate and the outer cylinder is located in the positioning groove;

[0018] The positioning groove is used to position the upper cover plate and the outer cylinder.

[0019] Preferably, an escape groove is provided on the outer periphery of the upper cover plate, and the escape groove provides a welding space for the outer cylinder and the annular top plate.

[0020] Preferably, the first part comprises an inner cylinder, and the inner peripheral end surface of the annular top plate is pressed against the upper end surface of the inner cylinder;

[0021] A welding avoidance hole is provided at the center of the upper cover plate, and the welding avoidance hole is used for welding the annular top plate and the inner cylinder; the upper pressing member can pass through the welding avoidance hole and move along the central axis of the central connecting shaft;

[0022] A positioning portion is provided on the inner periphery of the welding avoidance hole, and the positioning portion extends downward from the bottom of the positioning groove. The outer peripheral side wall of the positioning portion presses against the annular top plate and the inner side wall of the upper end of the inner cylinder at the same time.

[0023] Preferably, the inner cylinder support portion is circular, the outer cylinder support portion is annular, and the inner cylinder support portion and the outer cylinder support portion are coaxially arranged along the axis of the central connecting shaft.

[0024] Preferably, a mounting groove is formed on the lower base plate, and the mounting groove is arranged between the inner tube support portion and the outer tube support portion.

[0025] Preferably, a support platform is further provided on the lower base plate, and the support platform is arranged around the outer cylinder support portion.

[0026] Preferably, the outer cylinder comprises an outer cylinder member and an annular member, the lower end of the outer cylinder member is a third conical portion closing inwardly, the annular member is sleeved on the lower end of the outer cylinder member, and the upper end of the annular member is welded to the outer wall of the outer cylinder member, and the lower end surface of the annular member protrudes from the lower end surface of the third conical portion;

[0027] The outer cylinder support portion comprises a first support portion and a second support portion which are arranged in sequence in an annular manner. The first support portion is used to support and position the outer cylinder member, and the second support portion is used to support and position the annular member.

[0028] Preferably, the fastening connectors include a plurality of fastening connectors, which are arranged on the outside of the outer cylinder support portion and are evenly distributed along the outer circumference of the outer cylinder support portion.

[0029] Preferably, the fastening connector includes a screw head, a screw portion and a threaded portion, the screw head is connected to one end of the screw portion, the threaded portion is arranged at the other end of the screw portion, the screw portion passes through the upper cover plate, the screw head is pressed against the upper cover plate, and the threaded portion is threadedly connected to the lower base plate.

[0030] Compared with the prior art, the utility model has the following beneficial effects: in the utility model, the thin-walled part deformation control and shape correction device positions and fixes the first part through the upper pressure piece and the inner tube support part, and positions and fixes the second part through the upper cover plate and the outer tube support part, and ensures the relative position of the first part and the second part through the relative position of the inner tube support part and the outer tube support part.

[0031] Since the lower end surface of the first part presses against the surface where the inner tube support portion is located, and the lower end surface of the second part presses against the surface where the outer tube support portion is located, the relative positions of the first part and the second part along the central axial direction of the central connecting axis are adjusted by utilizing the relative heights of the surfaces where the inner tube support portion is located and the surfaces where the outer tube support portion is located along the central connecting axis.

[0032] After assembling the first part and the second part, the first part and the second part are welded. After welding, the tooling is disassembled, and the welded first part and the second part are removed. Axial deformation may occur between the first part and the second part due to springback and welding stress concentration. If the axial deformation does not meet the requirements, the relative height of the surface where the inner tube support part is located and the surface where the outer tube support part is located along the axial direction of the central connecting axis can be readjusted to re-clamp the welded first part and the second part, and the welded first part and the second part are compared using the tooling, and the welded parts are removed again to make the central axial deformation of the two meet the requirements, thereby reducing the scrap rate of the parts.

[0033] Therefore, the tooling can solve the bending and twisting deformation problems caused by the welding of thin-walled parts, and can correct the shape of some parts with small axial deformation after welding. After correction, they are still qualified products, reducing the scrap rate of products. In addition, the tooling has a simple structure and can be operated by ordinary workers using ordinary equipment. It can achieve positioning and control the central axial deformation of parts without the need for professional personnel to adjust, greatly reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a first angle of the thin-walled parts deformation control and shape correction device in the utility model;

[0035] Figure 2 It is a structural schematic diagram of a second angle of the thin-walled parts deformation control and shape correction device in the utility model;

[0036] Figure 3 It is a cross-sectional view of the thin-walled parts deformation control and shape correction device in the utility model;

[0037] Figure 4 It is a structural schematic diagram of the lower base plate in the utility model;

[0038] Figure 5 It is a structural schematic diagram of the upper cover plate in the utility model;

[0039] Figure 6 It is a front view of the thin-walled parts deformation control and shape correction device in the utility model;

[0040] Figure 7 It is a cross-sectional view of the thin-walled parts deformation control and shape correction device in the utility model;

[0041] Figure 8 It is a structural schematic diagram of a high-temperature alloy thin-walled part in the utility model at a first angle;

[0042] Fig. 9 It is a front view of the high temperature alloy thin-walled part in the utility model;

[0043] Fig.10 It is a cross-sectional view of the high-temperature alloy thin-walled part in the utility model.

[0044] Among them, 10, high-temperature alloy thin-walled parts; 101, inner cylinder; 102, outer cylinder; 1021, outer cylinder member; 1022, annular member; 103, annular top plate; 104, first conical portion; 105, second conical portion; 106, intermediate cylinder; 107, third conical portion; 1, lower bottom plate; 11, inner cylinder support portion; 12, outer cylinder support portion; 121, first support portion; 122, second support portion; 14, mounting groove; 15, support platform; 2, center connecting shaft; 3, upper pressure member; 4, upper cover plate; 41, avoidance groove; 42, welding avoidance hole; 43, positioning portion; 40, positioning groove; 5, fastening connector; 6, first fastening nut; 7, second fastening nut. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] like Figure 1-Figure 7 As shown, in this embodiment, a thin-walled part deformation control and shape correction device is provided, which includes a lower base plate 1, a central connecting shaft 2, an upper pressure piece 3, an upper cover plate 4 and a fastening connection piece 5.

[0053] The upper surface of the lower base plate 1 is protruded upward to form an inner tube support portion 11 and an outer tube support portion 12 , and the outer tube support portion 12 is arranged around the outer periphery of the inner tube support portion 11 .

[0054] The lower end of the first part is sleeved on the inner tube support part 11, and the inner tube support part 11 is used to support and position the first part. The lower end of the second part is sleeved on the outer tube support part 12, and the outer tube support part 12 is used to support and position the second part. The second part is sleeved on the outer periphery of the first part.

[0055] The lower end surface of the first part is pressed against the surface where the inner tube support portion 11 is located, and the lower end surface of the second part is pressed against the surface where the outer tube support portion 12 is located.

[0056] One end of the central connecting shaft 2 is connected to the center of the inner tube support portion 11 , and the other end of the central connecting shaft 2 is connected to the upper pressing member 3 .

[0057] The upper pressing member 3 can move along the central axis of the central connecting shaft 2 to press against the first part.

[0058] Specifically, the upper pressing member 3 can press against the top end surface of the first part directly or indirectly, or when the first part includes a reducing portion and the size of the upper end of the reducing portion is larger than the size of the lower end, the upper pressing member 3 presses against the reducing portion of the first part.

[0059] After the upper pressing member 3 is fastened, the upper pressing member 3 and the inner tube support portion 11 can fix the first component located therebetween.

[0060] The fastening connector 5 is arranged outside the outer tube support portion 12, one end of the fastening connector 5 is connected to the lower base plate 1, and the other end is connected to the upper cover plate 4. The fastening connector 5 is used to fix the second part between the upper cover plate 4 and the outer tube support portion 12.

[0061] Specifically, the size of the inner tube support portion 11 matches the size of the lower end of the first part, and the size of the outer tube support portion 12 matches the size of the lower end of the second part, ensuring that the first part contacts the side wall of the inner tube support portion 11 after being sleeved on the inner tube support portion 11, and the second part contacts the side wall of the outer tube support portion 12 after being sleeved on the outer tube support portion 12.

[0062] The relative heights of the surface pressed by the lower end surface of the first part and the surface pressed by the lower end surface of the second part are adjusted, thereby adjusting the relative positions of the first part and the second part along the central connecting axis 2.

[0063] The inner tube support portion 11 is used to support and position the first part, and the outer tube support portion 12 is used to support and position the second part. Specifically, after the first part is sleeved on the inner tube support portion 11, the inner tube support portion 11 supports the first part. At the same time, because the inner side wall of the first part contacts the side wall of the inner tube support portion 11, the inner tube support portion 11 also positions the first part. Similarly, the outer tube support portion 12 supports and positions the second part.

[0064] In this embodiment, the thin-walled part deformation control and shape correction device positions and fixes the first part through the upper pressure piece 3 and the inner tube support part 11, and positions and fixes the second part through the upper cover plate 4 and the outer tube support part 12. The relative position of the first part and the second part is ensured by the relative position of the inner tube support part 11 and the outer tube support part 12.

[0065] Since the lower end surface of the first part presses against the surface where the inner tube support portion 11 is located, and the lower end surface of the second part presses against the surface where the outer tube support portion 12 is located, the relative positions of the first part and the second part along the central axial direction of the central connecting axis 2 are adjusted by utilizing the relative heights of the surfaces where the inner tube support portion 11 and the outer tube support portion 12 along the central connecting axis 2.

[0066] After assembling the first part and the second part, the first part and the second part are welded. After welding, the tooling is disassembled, and the welded first part and the second part are removed. Axial deformation may occur between the first part and the second part due to springback and welding stress concentration. If the axial deformation does not meet the requirements, the relative height of the surface where the inner tube support part 11 is located and the surface where the outer tube support part 12 is located along the axial direction of the central connecting axis 2 can be readjusted to re-clamp the welded first part and the second part, and the welded first part and the second part are compared using the tooling, and the welded parts are removed again to make the central axial deformation of the two meet the requirements, thereby reducing the scrap rate of the parts.

[0067] Therefore, the tooling can solve the bending and twisting deformation problems caused by the welding of thin-walled parts, and can correct the shape of some parts with small axial deformation after welding. After correction, they are still qualified products, reducing the scrap rate of products. In addition, the tooling has a simple structure and can be operated by ordinary workers using ordinary equipment. It can achieve positioning and control the central axial deformation of parts without the need for professional personnel to adjust, greatly reducing production costs.

[0068] Specifically, the first part in this embodiment includes an inner cylinder 101, and the second part includes an outer cylinder 102 and an annular top plate 103. Specifically, in this embodiment, the outer cylinder 102 and the annular top plate 103 are separately provided, and both are welded after being installed on the tooling, and the inner circumferential end surface of the annular top plate 103 is pressed against the upper end surface of the inner cylinder 101.

[0069] In other embodiments, the outer peripheral end surface of the annular top plate 103 is pressed against the upper end surface of the outer cylinder 102, and the two are welded. Alternatively, the outer cylinder 102 is sleeved on the annular top plate 103, and the outer peripheral end surface of the annular top plate 103 is welded to the inner wall of the outer cylinder 102.

[0070] Preferably, a positioning groove 40 is provided on the lower bottom surface of the upper cover plate 4, and the top ends of the annular top plate 103 and the outer cylinder 102 are located in the positioning groove 40. The positioning groove 40 is used to position the upper cover plate 4 and the outer cylinder 102.

[0071] In this embodiment, the structural shape of the positioning groove 40 matches the structural shape of the annular top plate 103 .

[0072] Preferably, an escape groove 41 is provided on the outer circumference of the upper cover plate 4 , and the escape groove 41 provides a welding space for the outer cylinder 102 and the annular top plate 103 , and the upper cover plate and the outer cylinder 102 are spot-welded through the set escape groove 41 .

[0073] Specifically, the avoidance grooves 41 are evenly distributed along the outer circumference of the upper cover plate 4 to ensure that the welding positions of the outer cylinder 102 and the annular top plate 103 are evenly arranged along the circumferential direction, further reducing stress concentration after welding and reducing axial deformation.

[0074] Preferably, the avoidance groove 41 is an arc-shaped groove.

[0075] Preferably, a welding avoidance hole 42 is provided at the center of the upper cover plate 4, and the welding avoidance hole 42 is used for welding the annular top plate 103 and the inner cylinder 101. The welding avoidance hole 42 is provided to weld the inner cylinder 101 and the annular top plate 103, and the two are spot welded or partially welded.

[0076] A positioning portion 43 is provided on the inner periphery of the welding avoidance hole 42. The positioning portion 43 extends downward from the bottom of the positioning groove 40. The outer peripheral side wall of the positioning portion 43 presses against the inner side wall of the annular top plate 103 and the upper end of the inner cylinder 101. The positioning portion 43 is used to position the annular top plate 103 and the upper end of the inner cylinder 101.

[0077] Specifically, the positioning portion 43 extends from the inner circumference of the welding avoidance hole 42 toward the center of the upper cover plate 4 , and at the same time extends downward along the bottom of the avoidance groove 41 .

[0078] Preferably, the positioning portions 43 are evenly distributed along the inner circumference of the welding avoidance hole 42, and two adjacent groups of positioning portions 43 are arranged at a preset arc interval. This arrangement ensures that the welding positions of the inner cylinder 101 and the annular top plate 103 are evenly arranged along the circumference, further reducing stress concentration after welding and further reducing axial deformation after welding.

[0079] Figure 8-Figure 10As shown, the high temperature alloy thin-walled part 10 in this embodiment is used for the combustion chamber of an aircraft engine. The high temperature alloy thin-walled part 10 comprises the inner cylinder 101, the outer cylinder 102 and the annular top plate 103, the outer cylinder 102 is sleeved in the inner cylinder 101, the annular top plate 103 is arranged horizontally, the annular top plate 103 is annular, the inner and outer edges of the annular top plate 103 are both provided with arc portions, the inner arc portion of the annular top plate 103 is connected to the top end of the inner cylinder 101, and the outer arc portion of the annular top plate 103 is connected to the top end of the outer cylinder 102.

[0080] After the arc portion of the inner circumference of the annular top plate 103 of the high-temperature alloy thin-walled part 10 is welded to the inner cylinder 101, and after the arc portion of the outer circumference of the annular top plate 103 is welded to the outer cylinder 102, the curved surface deformation accuracy of the parts is high, and there are many welding positions for the three, and the heat generated during the welding process is large. The material thickness of the part is 0.5mm, the welding method used for the part is butt welding, and the contour of the part is 0.1mm.

[0081] In this embodiment, if Figure 1-Figure 10 As shown, the inner tube support portion 11 and the outer tube support portion 12 in this embodiment are both integrally arranged with the lower base plate 1. The inner tube support portion 11, the outer tube support portion 12 and the lower base plate 1 are processed separately and need to be assembled, which is easy to affect the relative position accuracy of the inner tube support portion 11 and the outer tube support portion 12.

[0082] The lower end surface of the inner cylinder 101 is pressed against the surface where the inner cylinder support portion 11 is located. The lower end of the inner cylinder 101 is sleeved on the inner cylinder support portion 11, and the inner side wall of the lower end of the inner cylinder 101 contacts the side wall of the outer cylinder support portion 12. The lower end surface of the outer cylinder 102 is pressed against the surface where the outer cylinder support portion 12 is located. The inner side wall of the lower end of the outer cylinder 102 contacts the side wall of the outer cylinder support portion 12.

[0083] The inner tube support 11 positions the lower end of the inner tube 101, and the outer tube support 12 positions the lower end of the outer tube 102. The relative positions of the inner tube support 11 and the outer tube support 12 ensure the relative positions of the inner tube 101 and the outer tube 102.

[0084] One end of the central connecting shaft 2 is connected to the lower base plate 1 , and the upper pressing member 3 is connected to the central connecting shaft 2 . The upper pressing member 3 can move along the central axis of the central connecting shaft 2 and press against the inner cylinder 101 .

[0085] One end of the fastening connector 5 is connected to the upper cover plate 4, and the other end is connected to the lower bottom plate 1. The upper cover plate 4 can be pressed on the upper surface of the annular top plate 103. The fastening connector 5 is used to fasten the upper cover plate 4 and the lower bottom plate 1, thereby fixing the annular top plate 103 and the outer cylinder 102 located between the upper cover plate 4 and the lower bottom plate 1. The fastening connector 5 can adjust the fastening force of the upper cover plate 4 and the lower bottom plate 1 on the annular top plate 103 and the inner cylinder 101, and the annular top plate 103 and the outer cylinder 102.

[0086] In this embodiment, the inner cylinder 101 is sleeved on the inner cylinder support portion 11, and the inner side wall of the lower end of the inner cylinder 101 contacts the side wall of the inner cylinder support portion 11. The lower end of the inner cylinder 101 is supported by the inner cylinder support portion 11, and the lower end surface of the inner cylinder 101 is pressed against the surface where the inner cylinder support portion 11 is located. The upper pressing member 3 can move along the central axis of the central connecting shaft 2 to press against the inner cylinder 101 and be fixed to the central connecting shaft 2. The inner cylinder 101 is fixed by the upper pressing member 3 and the lower base plate 1.

[0087] At the same time, the outer cylinder 102 is sleeved on the outer cylinder support part 12, and the inner side wall of the lower end of the outer cylinder 102 contacts the side wall of the outer cylinder support part 12. The lower end of the outer cylinder 102 is supported by the outer cylinder support part 12, and the upper cover plate 4 presses the upper surface of the annular top plate 103. The upper cover plate 4 presses the annular top plate 103, and the annular top plate 103 presses the inner cylinder 101 and the outer cylinder 102 at the same time. The annular top plate 103 is pressed down by the upper cover plate 4, so that the lower end surface of the outer cylinder 102 presses against the surface where the outer cylinder support part 12 is located, and the axial position of the outer cylinder 102 is in place, and the lower end surface of the inner cylinder 101 presses against the surface where the inner cylinder support part 11 is located, and the axial position of the inner cylinder 101 is in place. Afterwards, the fastening connector 5 fixes the upper cover plate 4 and the lower base plate 1, thereby fixing the annular top plate 103 and the outer cylinder 102 and the inner cylinder 101.

[0088] In addition, the positioning portion 43 simultaneously positions the upper end of the inner cylinder 101 and the annular top plate 103, further ensuring the relative position between the two.

[0089] Preferably, the upper pressing piece 3 can pass through the welding avoidance hole 42 and move along the central axis of the central connecting shaft 2 , so that the upper pressing piece 3 presses against the inner cylinder 101 .

[0090] In this embodiment, when the central axes of the inner cylinder 101 and the outer cylinder 102 are not coaxial, the inner cylinder 101 is supported and positioned by the inner cylinder support portion 11, and the outer cylinder 102 is supported and positioned by the outer cylinder support portion 12, so that the relative positions of the central axes of the inner cylinder 101 and the outer cylinder 102 can be ensured.

[0091] Preferably, the inner cylinder support portion 11 and the outer cylinder support portion 12 are coaxially arranged to position the inner cylinder 101 and the outer cylinder 102 coaxially, thereby ensuring the coaxiality of the inner cylinder 101 and the outer cylinder 102 .

[0092] Further preferably, in this embodiment, the inner cylinder support portion 11 is circular, the outer cylinder support portion 12 is annular, and the inner cylinder support portion 11 and the outer cylinder support portion 12 are coaxially arranged along the axis of the central connecting shaft 2 .

[0093] In this embodiment, the thin-walled part deformation control and shape correction device can position and fix the inner cylinder 101 and the outer cylinder 102, ensure the relative position and axial position of the inner cylinder 101 and the outer cylinder 102, and solve the problem of relative position and axial deformation of the inner cylinder 101 and the outer cylinder 102 after welding.

[0094] In addition, when the axial deformation of the high-temperature alloy thin-walled part 10 after welding exceeds the predetermined required value, the welded part is repeatedly installed on the thin-walled part deformation control and correction device, and the relative height of the surface where the inner tube support part 11 and the surface where the outer tube support part 12 are located along the central axis of the central connecting shaft 2 is adjusted. At the same time, the distance between the upper cover plate 4 and the lower bottom plate 1 is adjusted by the fastening connector 5, that is, the fastening force between the inner tube 101 and the annular top plate 103, and the outer tube 102 and the annular top plate 103 are adjusted, so that the lower end surface of the inner tube 101 of the high-temperature alloy thin-walled part 10 is in contact with the surface where the inner tube support part 11 is located, and the lower end surface of the outer tube 102 is in contact with the surface where the outer tube support part 12 is located, that is, the correction force of the welded part is adjusted by the fastening connector 5, and then the part is removed by flame shaping and / or holding for a predetermined time. The thin-walled part deformation control and correction device can correct the shape of some parts with small axial deformation after welding, and they are still qualified products after correction, thereby reducing the scrap rate of the product.

[0095] In this embodiment, the high temperature alloy thin-walled part 10 is a circular body of revolution. The inner cylinder 101 and the outer cylinder 102 are both circular bodies of revolution.

[0096] Specifically, in this embodiment, the lower end of the inner cylinder 101 protrudes from the lower end of the outer cylinder 102, and a mounting groove 14 is provided on the lower bottom plate 1. The mounting groove 14 is arranged between the inner cylinder support portion 11 and the outer cylinder support portion 12, and the inner cylinder support portion 11 is coaxially arranged with the mounting groove 14. The lower end of the inner cylinder 101 is sleeved on the inner cylinder support portion 11, and the lower end surface of the inner cylinder 101 is pressed against the bottom of the mounting groove 14. Further specifically, the mounting groove 14 in this embodiment is a circular annular groove.

[0097] In this embodiment, the inner cylinder 101 includes an intermediate cylinder 106, a first tapered portion 104 connected to the lower end of the intermediate cylinder 106, and a second tapered portion 105 connected to the upper end of the intermediate cylinder 106. The first tapered portion 104 gradually expands outward along the axial direction of the intermediate cylinder 106 downward, and the second tapered portion 105 gradually expands outward along the axial direction of the intermediate cylinder 106 upward.

[0098] The inner cylinder support portion 11 is a first truncated cone, and the inner side wall of the first conical portion 104 contacts the outer side wall of the first truncated cone. The upper pressing member 3 is inserted into the second conical portion 105 and presses against the inner surface of the second conical portion 105. Specifically, the upper pressing member 3 is a second truncated cone, and the inner side wall of the second conical portion 105 contacts the outer side wall of the second truncated cone.

[0099] In this embodiment, the outer cylinder 102 includes an outer cylinder member 1021 and an annular member 1022. The lower end of the outer cylinder member 1021 is a third conical portion 107 that closes inward. The annular member 1022 is sleeved on the lower end of the outer cylinder member 1021, and the upper end of the annular member 1022 is welded to the outer wall of the outer cylinder member 1021. The lower end surface of the annular member 1022 protrudes from the lower end surface of the third conical portion 107.

[0100] Preferably, the outer cylinder support portion 12 includes a first support portion 121 and a second support portion 122 which are arranged in sequence in an annular manner. The first support portion 121 is used to support and position the outer cylinder member 1021 , and the second support portion 122 is used to support and position the annular member 1022 .

[0101] Further preferably, the first support portion 121 is disposed around the outer circumference of the inner tube support portion 11 , and the second support portion 122 is disposed around the outer circumference of the first support portion 121 .

[0102] In this embodiment, the lower end of the outer cylinder 1021 is sleeved on the first support portion 121, and the inner side wall of the lower end of the outer cylinder 1021 contacts the side wall of the first support portion 121. The lower end surface of the outer cylinder 1021 presses against the surface where the first support portion 121 is located, that is, the lower end surface of the outer cylinder 1021 presses against the upper surface of the second support portion 122. The outer cylinder 1021 is fixed by the upper cover plate 4 and the first support portion 121.

[0103] The lower end of the annular member 1022 is sleeved on the second support portion 122, and the inner side wall of the lower end of the annular member 1022 contacts the side wall of the second support portion 122. The lower end surface of the annular member 1022 presses against the surface where the second support portion 122 is located, and the annular member 1022 is fixed by the upper cover plate 4 and the second support portion 122.

[0104] In this embodiment, the lower end surface of the annular member 1022 protrudes from the lower end surface of the outer cylinder member 1021 , and correspondingly, the height of the first supporting portion 121 is smaller than the height of the second supporting portion 122 .

[0105] In this embodiment, the first support portion 121 and the second support portion 122 are both in annular shape.

[0106] Preferably, a support platform 15 is provided on the lower base plate 1, and the support platform 15 is arranged around the outer periphery of the second support portion 122, and the second support portion 122 is located on the upper surface of the support platform 15. In this embodiment, the lower end surface of the annular member 1022 is pressed against the upper surface of the support platform 15. Since the surface in contact with the lower end surface of the annular member 1022 has a high precision requirement, the support platform 15 is provided to support the lower end surface of the outer cylinder member 1021. At the same time, the axial precision of the outer cylinder member 1021 after installation is further guaranteed, and no large axial deformation will occur after welding, thereby avoiding unqualified parts.

[0107] Preferably, there are multiple fastening connectors 5, which are arranged outside the outer cylinder support portion 12 and are evenly distributed along the outer circumference of the outer cylinder support portion 12. Specifically, there are eight groups of screws, which are evenly distributed along the circumference of the upper cover plate 4.

[0108] Further preferably, the fastening connector 5 includes a screw head, a screw portion and a threaded portion, the screw head is connected to one end of the screw portion, the threaded portion is arranged at the other end of the screw portion, the screw portion passes through the upper cover plate 4, the screw head is pressed against the upper cover plate 4, and the threaded portion is threadedly connected to the lower base plate 1. After the outer cylinder 102 is installed, the screw is screwed so that the lower end surface of the outer cylinder 1021 contacts the surface where the first support portion 121 is located, and the lower end surface of the annular member 1022 contacts the surface where the second support portion 122 is located, so as to ensure that after welding, no axial deformation occurs between the inner cylinder 101 and the outer cylinder 102.

[0109] In other embodiments, one end of the screw passes through the lower base plate 1, and the other end is threadedly connected to the upper cover plate 4. After the outer cylinder 102 is installed, the screw is screwed to adjust the lower end surface of the outer cylinder member 1021 to contact with the surface where the first support portion 121 is located, and the lower end surface of the annular member 1022 to contact with the surface where the second support portion 122 is located.

[0110] Preferably, the thin-walled part deformation control and correction device further comprises a first fastening nut 6, which is threadedly connected to the central connecting shaft 2 and can be pressed against the upper surface of the upper pressing member 3. The upper pressing member 3 is fastened by the first fastening nut 6. In other embodiments, the upper pressing member 3 is threadedly connected to the central connecting shaft 2. In this embodiment, a limiting portion is provided on the central connecting shaft 2 to limit the upper pressing member 3 to an extreme position of downward movement along the central axis of the central connecting shaft 2.

[0111] Preferably, the thin-walled part deformation control and correction device also includes a second fastening nut 7, the lower end of the center connecting shaft 2 is threadedly connected to the lower base plate 1, the second fastening nut 7 is threadedly connected to the center connecting shaft 2, and can be pressed against the upper surface of the inner tube support part 11, and the second fastening nut 7 locks the center connecting shaft 2.

[0112] Preferably, the upper cover plate 4 and the upper pressing member 3 are made of copper to ensure the structural strength of the upper cover plate 4 and the upper pressing member 3, and to facilitate the fixing of the outer cylinder 102, the inner cylinder 101 and the annular top plate 103. At the same time, during welding, rapid heat dissipation can be ensured, thereby reducing thermal deformation during welding.

[0113] Preferably, the material of the lower base plate 1 is 45 steel, which reduces the production cost while ensuring the structural strength.

[0114] The working process of the thin-walled parts deformation control and shape correction device in this embodiment is as follows:

[0115] The lower end of the inner cylinder 101 is sleeved on the inner cylinder support portion 11, and the lower end surface of the inner cylinder 101 is pressed against the surface where the inner cylinder support portion 11 is located. The upper pressing piece 3 is connected to the central connecting shaft 2. After the upper pressing piece 3 is pressed against the inner surface of the inner cylinder 101, the upper pressing piece 3 is fixed to ensure that the lower end surface of the inner cylinder 101 is completely in contact with the surface where the inner cylinder support portion 11 is located.

[0116] Because the outer cylinder 1021 and the annular member 1022 are welded to form the outer cylinder 102, when the outer cylinder 102 is installed in the device, the outer cylinder 1021 is sleeved on the first support portion 121, and the lower end surface of the outer cylinder 1021 presses against the surface where the first support portion 121 is located. The annular member 1022 is sleeved on the second support portion 122, and the lower end surface of the annular member 1022 presses against the surface where the second support portion 122 is located. The annular top plate 103 is placed on the inner cylinder 101 and the outer cylinder 102, and the upper cover plate 4 is installed so that the upper cover plate 4 and the annular top plate 103 are in full contact. The tightness of the fastening connector 5 and the lower base plate 1 is adjusted to adjust the gap between the outer cylinder member 1021 and the surface where the first support portion 121 is located, and the gap between the annular member 1022 and the surface where the second support portion 122 is located, so that the lower end surface of the outer cylinder member 1021 is in full contact with the surface where the first support portion 121 is located, and at the same time, the lower end surface of the annular member 1022 is in full contact with the surface where the second support portion 122 is located.

[0117] After installation is completed, spot weld the weld between the inner cylinder 101 and the annular top plate 103, and spot weld the weld between the outer cylinder 1021 and the annular top plate 103. After the parts are welded, disassemble the tooling, remove the parts, and fully weld the weld between the outer cylinder 1021 and the annular top plate 103, and the weld between the inner cylinder 101 and the annular top plate 103.

[0118] After the parts are cooled, check whether the central axial deformation of the parts is qualified. Since the welded parts may have stress concentration and springback problems, the welded parts may have unqualified axial deformation. If the central axial deformation of the parts exceeds the predetermined value, reinstall the parts on the lower base plate 1, and adjust the relative position between the surface where the lower end surface of the inner cylinder 101 is located and the surface where the lower end surface of the outer cylinder 102 is located. Specifically, this can be achieved by replacing different lower base plates 1, or by adding gaskets on the surface where the lower end surface of the inner cylinder 101 is located, or on the surface outside the lower end surface of the outer cylinder 102. When the adjustment is completed, reposition and fix the welded parts, and adjust the tightness of the fastening connector 5 until the welded parts are in full contact with the lower base plate 1, that is, adjust the fastening force of the welded parts. At the same time, the parts can be corrected by heating with a flame and / or keeping the parts for a predetermined time, and then removing the parts.

[0119] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A thin-walled parts deformation control and shape correction device, characterized in that: It comprises a lower base plate (1), a central connecting shaft (2), an upper pressing member (3), an upper cover plate (4) and a fastening connecting member (5); The upper surface of the lower base plate (1) is protruding upwards and is provided with an inner cylinder support portion (11) and an outer cylinder support portion (12), wherein the outer cylinder support portion (12) is arranged around the outer periphery of the inner cylinder support portion (11); The lower end of the first part is sleeved on the inner tube support portion (11), and the inner tube support portion (11) is used to support and position the first part; the lower end of the second part is sleeved on the outer tube support portion (12), and the outer tube support portion (12) is used to support and position the second part, and the second part is sleeved on the outer periphery of the first part; The lower end surface of the first part presses against the surface where the inner tube support portion (11) is located, and the lower end surface of the second part presses against the surface where the outer tube support portion (12) is located; One end of the central connecting shaft (2) is connected to the center of the inner cylinder support portion (11), and the other end is connected to the upper pressing member (3); The upper pressing member (3) is capable of moving along the central axis of the central connecting shaft (2) to press against the first part; The fastening connection member (5) is arranged on the outside of the outer cylinder support portion (12), one end of the fastening connection member (5) is connected to the lower base plate (1), and the other end is connected to the upper cover plate (4), and the fastening connection member (5) is used to fix the second part located between the upper cover plate (4) and the outer cylinder support portion (12); The upper cover plate (4) and the upper pressing member (3) are both made of red copper.

2. The thin-walled parts deformation control and shape correction device according to claim 1 is characterized in that: The second part comprises an outer cylinder (102) and an annular top plate (103); a positioning groove (40) is provided on the lower bottom surface of the upper cover plate (4); and the top ends of the annular top plate (103) and the outer cylinder (102) are located in the positioning groove (40); The positioning groove (40) is used to position the upper cover plate (4) and the outer cylinder (102).

3. The thin-walled parts deformation control and shape correction device according to claim 2 is characterized in that: An escape groove (41) is provided on the outer periphery of the upper cover plate (4), and the escape groove (41) provides a welding space for the outer cylinder (102) and the annular top plate (103).

4. The thin-walled parts deformation control and shape correction device according to claim 2, characterized in that: The first part comprises an inner cylinder (101), and the inner circumferential end surface of the annular top plate (103) is pressed against the upper end surface of the inner cylinder (101); A welding avoidance hole (42) is provided at the center of the upper cover plate (4), and the welding avoidance hole (42) is used for welding the annular top plate (103) and the inner cylinder (101); the upper pressing member (3) can pass through the welding avoidance hole (42) and move along the central axis of the central connecting shaft (2); A positioning portion (43) is provided on the inner periphery of the welding avoidance hole (42), and the positioning portion (43) extends downward from the bottom of the positioning groove (40), and the outer peripheral side wall of the positioning portion (43) is pressed against the inner side wall of the upper end of the annular top plate (103) and the inner side wall of the inner cylinder (101) at the same time.

5. The thin-walled parts deformation control and shape correction device according to claim 1, characterized in that: The inner cylinder support portion (11) is circular, the outer cylinder support portion (12) is annular, and the inner cylinder support portion (11) and the outer cylinder support portion (12) are coaxially arranged along the axis of the central connecting shaft.

6. The thin-walled parts deformation control and shape correction device according to claim 4, characterized in that: The lower base plate (1) is provided with a mounting groove (14), and the mounting groove (14) is arranged between the inner cylinder support portion (11) and the outer cylinder support portion (12).

7. The thin-walled parts deformation control and shape correction device according to claim 1, characterized in that: A support platform (15) is also provided on the lower base plate (1), and the support platform (15) is arranged around the outer cylinder support portion (12).

8. The thin-walled parts deformation control and shape correction device according to claim 4, characterized in that: The outer cylinder (102) comprises an outer cylinder member (1021) and an annular member (1022); the lower end of the outer cylinder member (1021) is a third conical portion (107) closing inwardly; the annular member (1022) is sleeved on the lower end of the outer cylinder member (1021); the upper end of the annular member (1022) is welded to the outer wall of the outer cylinder member (1021); and the lower end surface of the annular member (1022) protrudes from the lower end surface of the third conical portion (107); The outer cylinder support portion (12) comprises a first support portion (121) and a second support portion (122) which are arranged in sequence in an annular manner, wherein the first support portion (121) is used to support and position the outer cylinder member (1021), and the second support portion (122) is used to support and position the annular member (1022).

9. The thin-walled parts deformation control and shape correction device according to any one of claims 1 to 8, characterized in that: The fastening connectors (5) include a plurality of fastening connectors (5), which are arranged outside the outer cylinder support portion (12) and are evenly distributed along the outer circumference of the outer cylinder support portion (12).

10. The thin-walled parts deformation control and shape correction device according to any one of claims 1 to 8, characterized in that: The fastening connection piece (5) comprises a screw head, a screw portion and a threaded portion, the screw head being connected to one end of the screw portion, the threaded portion being arranged at the other end of the screw portion, the screw portion passing through the upper cover plate (4), the screw head being pressed against the upper cover plate (4), and the threaded portion being threadedly connected to the lower base plate (1).

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