A forming die and forming method for an arcuate thin-walled connecting piece

Abstract

The application discloses a forming die and a forming method of an arc-shaped thin-wall connecting piece. The arc-shaped thin-wall connecting piece comprises a first arc-shaped thin-wall body, a second arc-shaped thin-wall body and a connecting positioning piece connected between the two. The forming die comprises a forming stamping die, a split stamping die and a welding die. The forming die disclosed by the application can sequentially position and form split components of the arc-shaped piece, and can ensure welding precision and welding strength when welding subsequently. In addition, the forming raw material of the arc-shaped thin-wall connecting piece is a thin plate, which can solve the problems of material waste, cost increase and long processing period in the processing of the workpiece at present, and can greatly reduce the production cost of processing the product.

Description

Technical Field

[0001] This invention relates to the field of arc-shaped thin-walled connector molding technology, and in particular to a molding die and molding method for arc-shaped thin-walled connectors. Background Technology

[0002] Bow-shaped thin-walled components, resembling the structure of a bow and arrow, have a certain usage rate in specialized fields. Bow-shaped thin-walled connectors, as described in the instruction manual, are... Figure 1-2 As shown, it includes a first arc-shaped thin-walled body, a second arc-shaped thin-walled body, and a connecting and positioning member connecting the two; the three are an integral structure. Figure 10 As shown, the first and second arc-shaped thin-walled bodies have deformable structures in three spatial directions. Therefore, when forming workpieces with this type of structure, due to the complexity and numerous deformable structures, the current processing method involves milling the entire workpiece from a block blank using a machine tool. This means "carving out" the first and second arc-shaped thin-walled bodies from the blank, while the connecting positioning parts, being cylindrical structures, can be machined by turning. However, milling the first and second arc-shaped thin-walled bodies results in significant material waste, a longer processing cycle for each workpiece, and increased costs for tools, labor, and materials. Consequently, the cost for companies processing this type of workpiece is high, while the profit is low.

[0003] In actual milling of the first and second bow-shaped thin-walled bodies, as they gradually take shape within the block blank, their thickness gradually decreases to the design dimensions. Consequently, the connection strength between them on the block blank further declines, making them unable to effectively resist the machining forces of the milling tool. This leads to the workpiece deviating before reaching the design dimensions due to the reduced connection strength, thus affecting the machining accuracy. Currently, to solve this problem, machining is usually stopped when the connection strength between the workpiece and the blank is insufficient. The workpiece and blank are then sawn apart, followed by manual grinding. However, due to the complex structure, the grinding accuracy cannot be effectively guaranteed, further increasing the workpiece forming time. Furthermore, because the workpiece is formed by welding multiple separate components, its bow-shaped structure is difficult to position effectively, resulting in compromised accuracy and strength after welding. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a forming mold for an arc-shaped thin-walled connector. Compared to the current method of milling arc-shaped thin-walled connectors from block blanks, this invention can solve the problems of material waste, increased costs, and long processing cycles in the current processing of this type of workpiece, and can greatly reduce production costs for processing such products.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a molding die for an arc-shaped thin-walled connector, the arc-shaped thin-walled connector comprising a first arc-shaped thin-walled body, a second arc-shaped thin-walled body, and a connecting positioning member connected between the two, characterized in that the molding die comprises:

[0006] A forming stamping die, used to stamp sheet blanks into integral parts consisting of a first arc-shaped thin-walled body and a second arc-shaped thin-walled body;

[0007] The split stamping die is used to stamp the integral part into the first bow-shaped thin-walled body and the second bow-shaped thin-walled body, and to make the ends of the first bow-shaped thin-walled body and the second bow-shaped thin-walled body fit with the connecting positioning member.

[0008] A welding mold is used to position the first arc-shaped thin-walled body, the second arc-shaped thin-walled body, and the connecting positioning parts relative to each other, and then weld them together using welding equipment.

[0009] Furthermore, the forming stamping die includes an upper forming die and a lower forming die, both of which are provided with an upper protrusion and a lower groove that respectively fit against the two sides of the integral part, and a punching rod is provided in the lower groove at the connection position of the connecting positioning member, and a blind hole is provided in the upper protrusion to fit the punching rod.

[0010] Furthermore, the split stamping die has a split upper die and a split lower die, on which the upper groove and the lower protrusion are sequentially provided. A split column for forming and connecting positioning is provided in the upper groove, and a matching split groove is provided in the lower protrusion. A positioning rod at the same position as the punching rod is provided in the split groove.

[0011] Furthermore, the welding mold has positioning protrusions that fit the first and second arc-shaped thin-walled bodies, and a positioning placement groove for embedding and placing the connecting positioning member is also provided in the middle of the positioning protrusions.

[0012] A method for forming an arc-shaped thin-walled connector, characterized by comprising the following steps:

[0013] S1. Position the thin plate blank in the lower groove of the forming lower mold;

[0014] S2. The upper forming die moves down to contact the thin plate blank and cooperates with the lower forming die to form the integral part;

[0015] S3. Position the integral part on the lower protrusion of the split lower mold;

[0016] S4. The split upper mold moves down and contacts the integral part, and the integral part is divided into a first arc-shaped thin-walled body and a second arc-shaped thin-walled body by the split column;

[0017] S5. Embed the connecting positioning component into the positioning groove of the welding mold, and attach the first arc-shaped thin-walled body and the second arc-shaped thin-walled body to the two sides of the positioning protrusion of the welding mold respectively.

[0018] S6. Weld the connecting positioning parts to the joints of the first and second arc-shaped thin-walled bodies respectively to form an arc-shaped thin-walled connecting part with an integral structure.

[0019] The beneficial effects of this invention are: the molding die disclosed in this application can sequentially form the separate parts of the bow-shaped component, and at the same time, it can ensure the welding accuracy and welding strength during subsequent welding. In addition, the thin plate used in this application is the forming material for the bow-shaped thin-walled connector. Compared with the current milling process using block blanks, this can solve the problems of material waste, increased costs and long processing cycles in the current processing of this workpiece, and can greatly reduce the production cost for processing such products. Attached Figure Description

[0020] Figure 1 This is a front view of the bow-shaped thin-walled connector of the present invention.

[0021] Figure 2 This is a top view of the bow-shaped thin-walled connector of the present invention.

[0022] Figure 3 This is a schematic diagram of the split structure of the bow-shaped thin-walled connector of the present invention.

[0023] Figure 4 For the present invention Figure 3 Top view of the structure.

[0024] Figure 5 This diagram illustrates the placement of the forming stamping die and the sheet metal blank according to the present invention.

[0025] Figure 6 For the present invention Figure 5 Diagram showing the positioning of both ends of a thin slab blank.

[0026] Figure 7 This is a diagram illustrating the stamping process of the thin sheet blank of the present invention (illustrating the skew and offset of the thin sheet blank due to the stamping action).

[0027] Figure 8 For the present invention Figure 6 Enlarged view of the structure at point A (using a rubber sheet to further position the thin sheet blank).

[0028] Figure 9 This is a front view of the integral part after stamping according to the present invention.

[0029] Figure 10 This is a cross-sectional view of the integral component of the present invention.

[0030] Figure 11 This is a top view of the overall structure of the present invention.

[0031] Figure 12 This is a schematic diagram illustrating the assembly structure of the split stamping die and the integral part of the present invention.

[0032] Figure 13 This is a top view of the first and second bow-shaped thin-walled bodies after the split stamping process of this invention.

[0033] Figure 14 This is a structural diagram illustrating the welding mold of the present invention in conjunction with the first arc-shaped thin-walled body, the second arc-shaped thin-walled body, and the connecting positioning component.

[0034] Figure 15 For the present invention Figure 14 Top view of the structure.

[0035] Figure 16 For the present invention Figure 15 Enlarged view of the structure at point B in the middle.

[0036] Figure 17 This diagram illustrates the artificial variation in the welding gap between the intermediate connector and the first and second arc-shaped thin-walled bodies of the present invention.

[0037] Figure 18 This is a front view of the gap positioning sleeve of the present invention.

[0038] Figure 19 This is a diagram illustrating the fitting of the gap positioning sleeve and the connecting positioning component of the present invention.

[0039] Figure 20 This is a diagram showing the first and second arc-shaped thin-walled bodies of the present invention being positioned in contact with the side wall of the gap positioning sleeve.

[0040] Figure 21 For the present invention Figure 20 After spot welding, the gap positioning sleeve is disengaged from the connecting positioning component as shown in the diagram.

[0041] Figure 22 This is a front view of the bow-shaped thin-walled connector of the present invention.

[0042] Figure 23 This is a top view of the bow-shaped thin-walled connector of the present invention.

[0043] Figure 24 This is a front view of the overall component of the present invention.

[0044] Figure 25 This is a top view of the overall component of the present invention.

[0045] Figure 26 This is a top view of the modular components of the present invention.

[0046] Figure 27 The diagram illustrates the welding mold of the present invention and the first and second bow-shaped thin-walled bodies that are manually supported.

[0047] Figure 28 Strength test of the bow-shaped thin-walled connector manufactured for this invention Figure 1 .

[0048] Figure 29 Strength test of the bow-shaped thin-walled connector manufactured for this invention Figure 2 .

[0049] In the diagram: a1-First arched thin-walled body; a2-Second arched thin-walled body; a3-Connecting positioning component; a-Integral part; 11-Forming upper mold; 12-Forming lower mold; 11a-Upper protrusion; 12a-Lower groove; 13-Punching rod; 14-Positioning plate; 15-Rubber plate; 151-Positioning ridge; 21-Splitting upper mold; 22-Splitting lower mold; 21a-Upper groove; 22a-Lower protrusion; 21b-Splitting column; 22b-Splitting groove; 23-Positioning rod; 3-Welding mold; 3a-Positioning protrusion; 3b-Positioning placement groove; 4-Adjusting ejector screw; 5-Gap positioning sleeve; 5a-Weld joint. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] See attached document Figures 1-21 The diagram shows a molding die for an arc-shaped thin-walled connector, the arc-shaped thin-walled connector comprising a first arc-shaped thin-walled body a1, a second arc-shaped thin-walled body a2, and a connecting positioning member a3 connecting the two, the three forming an integral structure of the workpiece as shown. Figure 1-2 As shown, the split structural components are as follows Figure 3-4 As shown. Preferably, the connecting positioning member a3 is a cylindrical structure. To solve the problems of material waste, increased costs, and long processing cycles in the current workpiece processing, this application provides a forming mold, which includes:

[0052] A forming stamping die is used to stamp thin sheet metal blanks into an integral part a, consisting of a first arched thin-walled body a1 and a second arched thin-walled body a2. The forming stamping process is as follows: Figure 5-7 As shown, the structure of the integral part a after molding is as follows: Figure 9 As shown.

[0053] A split stamping die is used to stamp the integral part a into a first arc-shaped thin-walled body a1 and a second arc-shaped thin-walled body a2, such that the ends of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 are in a fitted structure with the connecting positioning member a3. The split stamping process is as follows: Figure 12As shown, the structures of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 after molding are as follows: Figure 13 As shown.

[0054] Welding mold 3 is used to position the first arc-shaped thin-walled body a1, the second arc-shaped thin-walled body a2, and the connecting positioning member a3 relative to each other, and then welds them together using welding equipment. Welding mold 3 is as follows... Figure 14-15 As shown, the integral workpiece after welding is as follows: Figure 1-2 As shown.

[0055] Specifically, such as Figure 5-7 As shown, the forming stamping die includes an upper forming die 11 and a lower forming die 12, both of which have upper protrusions 11a and lower grooves 12a that respectively conform to the two side surfaces of the integral part a. A punching rod 13 is provided in the lower groove 12a at the connection position of the connecting positioning member a3. A blind hole (not shown in the figure) is provided in the upper protrusion 11a to accommodate the punching rod 13. During the stamping operation, the sheet metal blank is placed in the lower groove 12a in the lower forming die 12, and the length of the sheet metal blank extending into the lower groove 12a on both sides is kept equal (e.g., ...). Figure 5 As shown), this ensures that the deformation lengths on both sides of the sheet metal blank are equal after it is formed into the integral part a. After the sheet metal blank is positioned on the lower forming die 12, the upper forming die 11 moves down to contact the sheet metal blank and cooperates with the lower forming die 12 to form the sheet metal blank into the integral part a with an arc-shaped structure. At the same time, during the stamping process, a positioning hole is punched out on the sheet metal blank through the punching rod 13. This positioning hole is located at the position of the intermediate connecting part, which will be removed later. The formed positioning hole is used for positioning during subsequent split stamping.

[0056] Before stamping, the lengths of the thin sheet metal extending beyond the ends of the forming die 12 on both sides cannot be guaranteed to be equally accurate when manually adjusted, resulting in uneven horizontal widths on both sides after stamping. Therefore, to solve this problem, such as... Figure 6 As shown, the positioning plates 14, which are obliquely arranged on both sides of the lower forming mold 12, are used during operation to place the thin sheet blank in the lower groove 12a of the lower forming mold 12, so that both ends of the thin sheet blank contact the inner walls of the positioning plates 14 on both sides. This ensures that the length of the thin sheet blank extending out of the lower forming mold 12 on both sides is equal, effectively guaranteeing the forming accuracy of the integral part a. The oblique arrangement of the positioning plates 14 allows the ends of the thin sheet blank to effectively abut against the inner wall of the positioning plates 14, avoiding the problem of left and right deviation of the thin sheet blank due to the placement gap between the positioning plates 14 and the thin sheet blank when the positioning plates 14 are set vertically. This achieves a precise positioning function.

[0057] like Figure 7As shown, during the process of the stamping equipment driving the upper forming die 11 downward, the working force transmission of the stamping equipment usually causes the thin sheet blank to sway, which in turn leads to... Figure 7 The offset and skew of the thin plate workpiece indicated by the middle arrow will also affect the stamping accuracy of the entire part a. Therefore, to solve this problem, such as... Figure 8 As shown, rubber plates 15 are provided on the inner sidewalls of the positioning plate 14, and positioning ridges 151 are provided at intervals on the inner surface of the rubber plates 15. After the thin sheet blank is placed on the forming lower die 12, the positioning ridges 151 exert downward pressure on the ends of the thin sheet blank, thereby overcoming the problem of the thin sheet blank shifting or deviating before stamping due to its light weight and the force transmitted by the stamping equipment. This effectively ensures the stamping accuracy of the integral part a.

[0058] After stamping the sheet metal blank into the integral part a structure as described above, split stamping is performed, such as... Figure 12 As shown, the split stamping die has a split upper die 21 and a split lower die 22, on which are sequentially provided an upper groove 21a and a lower protrusion 22a. A split post 21b for forming and connecting the positioning element a3 is provided in the upper groove 21a, and a matching split groove 22b is provided in the lower protrusion 22a. A positioning rod 23, positioned at the same location as the punching rod 13, is provided in the split groove 22b. Preferably, a positioning hole (not shown in the figure) is provided in the upper groove 21a for the positioning rod 23 to be inserted. During operation, the hole punched on the integral part a by the punching rod 13 is fitted with the positioning rod 23 to achieve positioning and assembly of the integral part a and the split lower die 22. Then, by moving the split upper die 21 downwards and contacting the integral part, the integral part a can be stamped and divided into a first arc-shaped thin-walled body a1 and a second arc-shaped thin-walled body a2, as shown in the figure. Figure 13 As shown.

[0059] After the above-mentioned split stamping is completed, welding is performed to connect them. Specifically, as follows: Figure 14-15 As shown, the welding mold 3 has positioning protrusions 3a that fit the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2, and a positioning groove 3b for embedding and placing the connecting positioning member a3 is also provided in the middle of the positioning protrusions 3a. During the welding operation, the connecting positioning member a3 is embedded and positioned in the positioning groove 3b of the welding mold 3, and the separated first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 are sequentially attached to the positioning protrusions 3a on both sides of the connecting positioning member a3. Then, the joint between the connecting positioning member a3 and the two parts is welded to form an integral arc-shaped workpiece.

[0060] To achieve the relative vertical positioning of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2, such as... Figure 14As shown, an adjusting screw 4 is embedded in the positioning slot 3b. The height of the connecting positioning member a3 can be adjusted by the adjusting screw 4 to ensure its relative positioning accuracy with the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 in the vertical direction.

[0061] like Figure 14 As shown, the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2, placed on the positioning protrusion 3a, will move along due to their own weight. Figure 14 The downward movement of the arrowhead increases the distance between the object and the connecting positioning component a3, resulting in unequal extension lengths of the first and second arc-shaped thin-walled bodies a1 and a2 after welding, affecting their later use. However, if the first and second arc-shaped thin-walled bodies a1 and a2 are manually supported to solve the problem of downward movement due to gravity, it will form a... Figure 17 As shown, if the support distance is too small, the gap between the support and the connecting positioning component a3 will increase, and the extension length of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 cannot be guaranteed. At the same time, the gap must accommodate a large amount of welding material. Conversely, if the support distance is too large, the gap between the support and the connecting positioning component a3 will be too small. While the extension length of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 on both sides still cannot be guaranteed, the gap will also contain too little welding material, leading to insufficient welding strength (welding strength test results are as follows). Figures 28-29 As shown, when a 20kg weight is applied, the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 on both sides do not break with the connecting positioning part a3. Therefore, to solve this problem:

[0062] like Figure 18 As shown, a gap positioning sleeve 5 is also fitted onto the outer wall of the connecting positioning member a3. A welding port 5a is provided on its outer wall, partially exposing the junction of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 with the connecting positioning member a3. The lower side of this welding port 5a has a through-hole structure. During welding, the connecting positioning member a3 is first embedded in the positioning groove 3b and its height is adjusted using a set screw. Then, the gap positioning sleeve 5 is fitted onto the outside of the connecting positioning member a3, as shown. Figure 20 As shown; then the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 are attached to the outer wall of the gap positioning sleeve 5, and the gap positioning sleeve 5 achieves equidistant positioning of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 on both sides with the connecting positioning member a3.

[0063] The welding joint 5a allows the partial contact points between the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 and the connecting positioning member a3 to be exposed externally. Spot welding connection between the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 and the connecting positioning member a3 can be achieved through this welding joint 5a. After spot welding and tightening, because the bottom side of the welding joint 5a has a through-hole structure, it can... Figure 21 As indicated by the middle arrow, disengage the gap positioning sleeve 5 from the connecting positioning component a3, and then perform full welding operation between the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 and the connecting positioning component a3.

[0064] This application also provides a method for forming an arc-shaped thin-walled connector, comprising the following steps:

[0065] S1, such as Figure 5-6 As shown, the thin plate blank is positioned in the lower groove 12a of the lower forming mold 12, and both ends of the thin plate blank are in contact with the inner walls of the positioning plates 14 on both sides; then the positioning ridges 151 of the rubber plate 15 achieve a downward pressing effect on the ends of the thin plate blank, thereby achieving the relative positioning of the thin plate blank relative to the lower forming mold 12 and overcoming the offset displacement of the thin plate blank caused by the downward movement of the upper forming mold 11;

[0066] S2, the upper forming mold 11 moves downward to contact the thin plate blank, and cooperates with the lower forming mold 12 to form the blank as shown in the figure. Figure 9-11 The integral component a shown;

[0067] S3, such as Figure 12 As shown, the integral part a is fitted and positioned on the lower protrusion 22a of the split lower mold 22. The positioning and assembly of the integral part a and the split lower mold 22 are achieved by fitting the hole punched in the integral part a by the punching rod 13 and the positioning rod 23.

[0068] S4. The split upper mold 21 moves downward to contact the integral part a, and the integral part a is stamped and divided into a first arc-shaped thin-walled body a1 and a second arc-shaped thin-walled body a2 by the split column 21b, as shown. Figure 13 The molding structure shown;

[0069] S5. The connecting positioning piece a3 is embedded into the positioning placement groove 3b of the welding mold 3, and the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 are respectively attached to the two sides of the positioning protrusion 3a of the welding mold 3. Then, the height of the connecting positioning piece a3 can be adjusted by adjusting the adjusting screw 4 to ensure the relative positioning accuracy of it with the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 in the vertical direction.

[0070] Then, the gap positioning sleeve 5 is fitted onto the outside of the connecting positioning part a3, such as... Figure 19 As shown; then the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 are attached to the outer wall of the gap positioning sleeve 5.

[0071] S6. Spot weld the connection points of the connecting positioning part a3 with the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 from the welding port 5a. After the spot weld connection is tightened, separate the gap positioning sleeve 5 from the connecting positioning part a3. Then, perform full welding operation between the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 and the connecting positioning part a3 to form an arc-shaped thin-walled connector with an integral structure.

[0072] The principle of this invention is as follows: When performing the forming operation of the bow-shaped thin-walled connector, the thin plate blank is first positioned in the lower groove 12a of the forming lower mold 12, and the two ends of the thin plate blank are in contact with the inner walls of the positioning plates 14 on both sides; then the positioning ridges 151 of the rubber plate 15 achieve the downward pressure on the ends of the thin plate blank, thereby achieving the relative positioning of the thin plate blank relative to the forming lower mold 12;

[0073] Next, the upper forming die 11 is driven down by the stamping equipment to contact the sheet metal blank and cooperate with the lower forming die 12 to form the integral part a;

[0074] Next, the integral part a is fitted and positioned on the lower protrusion 22a of the split lower mold 22. The positioning rod 23 is sleeved on the hole punched by the punching rod 13 on the integral part a to achieve the positioning and assembly of the integral part a and the split lower mold 22.

[0075] Next, the split upper mold 21 moves down to contact the integral part a, and the integral part a is stamped and divided into the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 by the split column 21b;

[0076] Next, the connecting positioning piece a3 is embedded into the positioning groove 3b of the welding mold 3, and the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 are respectively attached to the two sides of the positioning protrusion 3a of the welding mold 3; at the same time, the height of the connecting positioning piece a3 is adjusted by adjusting the set screw 4.

[0077] Then the gap positioning sleeve 5 is fitted onto the outside of the connecting positioning member a3, and then the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 are attached to the outer wall of the gap positioning sleeve 5.

[0078] Next, spot weld the connection points of the connecting positioning component a3 with the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 from the welding port 5a. After the spot weld connection is tightened, the gap positioning sleeve 5 is separated from the connecting positioning component a3, and then the full welding operation of the first arc-shaped thin-walled body a1 and the second arc-shaped thin-walled body a2 with the connecting positioning component a3 can be performed to form an arc-shaped thin-walled connector with an integral structure.

[0079] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A molding die for an arc-shaped thin-walled connector, the arc-shaped thin-walled connector comprising a first arc-shaped thin-walled body, a second arc-shaped thin-walled body, and a connecting positioning member connecting the two, characterized in that, The molding die includes: A forming stamping die, used to stamp sheet blanks into integral parts consisting of a first arc-shaped thin-walled body and a second arc-shaped thin-walled body; The split stamping die is used to stamp the integral part into the first bow-shaped thin-walled body and the second bow-shaped thin-walled body, and to make the ends of the first bow-shaped thin-walled body and the second bow-shaped thin-walled body fit with the connecting positioning member. A welding mold is used to position the first arc-shaped thin-walled body, the second arc-shaped thin-walled body, and the connecting positioning parts relative to each other, and then weld them together using welding equipment. The forming stamping die includes an upper forming die and a lower forming die, and both are provided with an upper protrusion and a lower groove that respectively fit with the two sides of the integral part. A punching rod is provided in the lower groove and at the connection position of the connecting positioning part. A blind hole is provided in the upper protrusion to fit the punching rod. Positioning plates are obliquely arranged on both sides of the lower forming mold; Rubber plates are provided on the inner sidewalls of the positioning plates, and positioning ridges are provided at intervals on the inner surface of the rubber plates. The split stamping die includes a split upper die and a split lower die, on which an upper groove and a lower protrusion are sequentially provided. A split column for forming a connecting positioning component is provided in the upper groove, and a matching split groove is provided in the lower protrusion. A positioning rod at the same position as the punching rod is provided in the split groove. The welding mold has a positioning protrusion that fits the first and second arc-shaped thin-walled bodies, and a positioning placement groove for embedding and placing the connecting positioning component is also provided in the middle of the positioning protrusion. An adjusting screw is embedded in the positioning slot; A gap positioning sleeve is also fitted on the outer wall of the connecting positioning member, and a welding port is opened on its outer wall to partially expose the junction of the first and second arc-shaped thin-walled bodies with the connecting positioning member, and the lower side of the welding port is a through-hole structure.

2. A method for forming an arc-shaped thin-walled connector using the molding die according to claim 1, characterized in that, Includes the following steps: S1. Position the thin plate blank in the lower groove of the forming lower mold; S2. The upper forming die moves down to contact the thin plate blank and cooperates with the lower forming die to form the integral part; S3. Position the integral part on the lower protrusion of the split lower mold; S4. The split upper mold moves down and contacts the integral part, and the integral part is divided into a first arc-shaped thin-walled body and a second arc-shaped thin-walled body by the split column; S5. Embed the connecting positioning component into the positioning groove of the welding mold, and attach the first arc-shaped thin-walled body and the second arc-shaped thin-walled body to the two sides of the positioning protrusion of the welding mold respectively. S6. Weld the connecting positioning parts to the joints of the first and second arc-shaped thin-walled bodies respectively to form an arc-shaped thin-walled connecting part with an integral structure.

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