Forming die of bogie side beam, bogie side beam and manufacturing method

Abstract

The embodiment of the invention provides a forming die of a bogie side beam, the bogie side beam and a manufacturing method. The lower die is provided with a first workpiece groove and a second workpiece groove; the shape of the inner wall of the first workpiece groove is matched with that of the part, needing to be bent for the first time, of the bogie side beam plate; the shape of the inner wall of the second workpiece groove is matched with that of the part, needing to be bent for the second time, of the side beam plate; an upper mold; the upper die is provided with a first protruding part and a second protruding part. The surface shape of the first protruding part is matched with the inner wall of the first workpiece groove, and the surface shape of the second protruding part is matched with the inner wall of the second workpiece groove. According to the forming die of the bogie side beam, the bogie side beam and the manufacturing method provided by the embodiment of the invention, the occupied operation space can be reduced, the yield is improved, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to die-making technology, and more particularly to a forming die for a bogie side beam, a bogie side beam, and a manufacturing method thereof. Background Technology

[0002] The bogie is a crucial component of rail vehicles, located beneath the car body to support its weight and enable running and steering functions. The bogie frame is manufactured using two methods: integral casting and steel plate welding. In the steel plate welding process, the upper side beam, lower side beam, and side plates are welded together to form a box-shaped structure.

[0003] For the cold pressing of the bogie side beams, a thousand-ton hydraulic press is usually used, and a special forming mold is developed for each side beam. The steel plate is placed in the forming mold, which is then installed on the press. After the mold is closed, the press applies pressure to make it bend and deform.

[0004] The bogie side beams have a complex shape with multiple bends, requiring a specific mold to be designed and manufactured for each bend. During the molding process, each mold needs to be mounted on a press. Due to the large size of the molds, the assembly and disassembly time is lengthy, resulting in a large workload and high labor costs. Therefore, to reduce the number of mold changes, typically one mold is installed after the press, and multiple side beams are molded sequentially for the first time. After molding, the mold is changed, and the same batch of side beams is molded a second time, repeating this process multiple times until all side beams are molded. During this process, multiple side beams need to be stored near the press, occupying a significant amount of space. On the one hand, this requires a large number of people to coordinate the placement, loading, unloading, and recording operations, which is inefficient and difficult, leading to low production efficiency and a long production cycle. On the other hand, stacking multiple side beams together can easily cause mixing, resulting in defective products and seriously affecting product quality. Summary of the Invention

[0005] To address one of the aforementioned technical deficiencies, this application provides a forming mold for a bogie side beam, a bogie side beam, and a manufacturing method thereof.

[0006] According to a first aspect of the embodiments of this application, a forming mold for a bogie side beam is provided, comprising: The lower mold is provided with a first workpiece groove and a second workpiece groove. The shape of the inner wall of the first workpiece groove matches the shape of the part of the bogie side beam plate that needs to be bent for the first time. The shape of the inner wall of the second workpiece groove matches the shape of the part of the side beam plate that needs to be bent for the second time. The upper mold is provided with a first protrusion and a second protrusion; the surface shape of the first protrusion matches the inner wall of the first workpiece groove, and the surface shape of the second protrusion matches the inner wall of the second workpiece groove.

[0007] According to a second aspect of the embodiments of this application, a method for manufacturing a bogie side beam is provided, comprising: Install the lower mold and the upper mold of the forming mold onto the press respectively, so that the lower mold and the upper mold are in the open state; Place the bogie side beam plate into the first workpiece slot of the forming mold; Start the press and move the upper mold until the first protrusion of the upper mold contacts the side beam plate. Continue to move downward until the upper mold and the lower mold close together to complete one forming process. After one forming, the upper mold is moved upward to the open mold state; the one-formed bogie side beam plate is flipped up and down and then placed into the second workpiece slot of the forming mold; Start the press, which moves the upper mold until the second protrusion of the upper mold contacts the side beam plate. Continue to move downwards until the upper mold and the lower mold close together, completing the secondary forming.

[0008] According to a third aspect of the embodiments of this application, a bogie side beam is provided, which is manufactured using the forming mold described above, or manufactured using the method described above.

[0009] The technical solution provided in this application embodiment uses a lower mold with a first workpiece groove and a second workpiece groove; the shape of the inner wall of the first workpiece groove matches the shape of the part of the bogie side beam plate that needs to be bent for the first time; the shape of the inner wall of the second workpiece groove matches the shape of the part of the side beam plate that needs to be bent for the second time; the upper mold has a first protrusion and a second protrusion; the surface shape of the first protrusion matches the inner wall of the first workpiece groove, and the surface shape of the second protrusion matches the inner wall of the second workpiece groove, which can reduce the occupation of working space, improve the yield, and reduce production costs. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the traditional method for molding the side beams of the bogie. Figure 2 This is a schematic diagram of the unformed side beam plate of the bogie; Figure 3 This is a schematic diagram of the bogie side beam after it has been formed. Figure 4 This is a schematic diagram of the structure of the lower mold in the forming mold provided in the embodiments of this application; Figure 5 This is a schematic diagram of the lower mold in the forming mold provided in the embodiment of this application from another angle; Figure 6 This is a schematic diagram of the structure of the upper mold in the forming mold provided in the embodiments of this application; Figure 7 This is a schematic diagram illustrating the application of a forming mold to a press in an embodiment of this application; Figure 8 This is a schematic diagram of the structure for removing the first and second air pressure pads from the lower mold, provided in an embodiment of this application. Figure 9 This is a schematic diagram of the structure of the first air pressure cushion in the lower mold provided in an embodiment of this application; Figure 10 This is a schematic diagram of the structure of the second air pressure cushion in the lower mold provided in an embodiment of this application; Figure 11 A schematic diagram of the structure in which the side beam plate is placed in the first workpiece groove of the lower mold during the manufacturing process of the bogie side beam provided in the embodiment of this application; Figure 12 A schematic diagram of the upper mold being closed during the manufacturing process of the bogie side beam provided in this application embodiment; Figure 13 A schematic diagram of the bogie side beam being formed in one step during the manufacturing process of the embodiment of this application; Figure 14 A schematic diagram of the structure of the first clamping mechanism lifting the side beam plate after the first forming is completed in the manufacturing process of the bogie side beam provided in the embodiment of this application; Figure 15 A schematic diagram of the structure in which the side beam plate is flipped over and placed into the second workpiece slot during the manufacturing process of the bogie side beam provided in the embodiment of this application; Figure 16 Another structural diagram illustrating the joining of the upper mold and the upper mold during the manufacturing process of the bogie side beam provided in this application embodiment; Figure 17 A schematic diagram of the structure of the bogie side beam after secondary forming during the manufacturing process provided in the embodiments of this application; Figure 18 This is a schematic diagram of the structure of the second clamping mechanism that lifts the side beam plate after the second forming is completed during the manufacturing process of the bogie side beam provided in this application embodiment.

[0011] Figure label: 1-Lower mold; 11-First workpiece groove; 12-Second workpiece groove; 13-Mold closing guide groove; 14-First forming arc; 15-First air pressure cushion; 151-First positioning protrusion; 152-First anti-rotation protrusion; 153-First cylinder support groove; 16-First air pressure cylinder; 17-Weight reduction hole; 18-Second forming arc; 19-Second air pressure cushion; 191-Second positioning protrusion; 192-Second anti-rotation protrusion; 110-Second air pressure cylinder; 111-Limit block; 2-Upper mold; 21-First protrusion; 22-Second protrusion; 23-Mold closing guide block; 24-First guide arc; 25-Second guide arc; 3-Side beam plate; 31-First forming part; 32-Second forming part; 4-Supporting components; 5-Pressure press. Detailed Implementation

[0012] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0013] In the traditional approach, the cold pressing of the bogie side beams is usually done using a thousand-ton hydraulic press. A special forming mold is developed for each side beam. The steel plate is placed in the forming mold, which is then installed on the press. After the mold is closed, pressure is applied by the press to bend and deform it.

[0014] like Figure 1 As shown, one of the forming molds developed for the side beam plate includes a lower mold 1 and an upper mold 2. The lower mold 1 and the upper mold 2 are respectively provided with a concave structure and a convex structure, which are used to apply pressure to the side beam plate 3 under the action of a press to make it bend and deform. An elastic support member 4 is provided in the lower mold to support the side beam plate 3 from below.

[0015] Before the side beam plate 3 is formed, as shown Figure 2 As shown, after forming... Figure 3 As shown. To form Figure 3 The structure shown requires two forming processes for the side beam plate 3, bending it at the first forming part 31 and the second forming part 32. Traditional methods cannot achieve rapid and efficient production, occupy a large working space, and are prone to material mixing, leading to poor yield.

[0016] This embodiment provides a forming die for forming a bogie side beam. When installed on a press, the forming die can complete the forming operations of the first forming portion 31 and the second forming portion 32 of the side beam plate.

[0017] like Figures 4 to 8 As shown, the forming mold includes a lower mold 1 and an upper mold 2. The lower mold 1 has a first workpiece groove 11 and a second workpiece groove 12. The shape of the inner wall of the first workpiece groove 11 matches the shape of the part of the bogie side beam plate 3 that needs to be bent for the first time, and the shape of the inner wall of the second workpiece groove 12 matches the shape of the part of the side beam plate 3 that needs to be bent for the second time.

[0018] The part that needs to be bent for the first time can be Figure 3 The first forming part 31, the part that needs to be bent a second time can be Figure 3 The second forming portion 32 is formed by first forming the first forming portion 31 and then forming the second forming portion 32. The solution provided later in this embodiment describes this sequence.

[0019] Alternatively, the part that needs to be bent the first time can be... Figure 3 The second forming part 32, the part that needs to be bent a second time can be Figure 3 The first forming part 31 is formed by first forming the second forming part 32 and then forming the first forming part 31.

[0020] The upper mold 2 is provided with a first protrusion 21 and a second protrusion 22. The surface shape of the first protrusion 21 matches the inner wall of the first workpiece groove 11, and the surface shape of the second protrusion 22 matches the inner wall of the second workpiece groove 12.

[0021] In the application of the above-mentioned forming mold, the lower mold 1 and the upper mold 2 are first installed on the press 5, and the two are in the mold separation state. Then, the side beam plate is placed in the first workpiece groove 11, and the press is started to move the upper mold 2 downward until the first protrusion 21 contacts the side beam plate 3, and continues to move downward to apply pressure to the side beam plate 3 until the lower mold 1 and the upper mold 2 close. The side beam plate is bent by the cooperation of the first protrusion 21 and the first workpiece groove 11, completing one forming.

[0022] Next, the upper mold 2 is moved upward to the parting state, the side beam plate after one-time forming is flipped over and placed in the second workpiece groove 12. The press is started to move the upper mold 2 downward until the second protrusion 22 contacts the side beam plate 3, and continues to move downward to apply pressure to the side beam plate 3 until the lower mold 1 and the upper mold 2 are closed. The side beam plate is bent by the cooperation of the second protrusion 22 and the second workpiece groove 21, completing the secondary forming.

[0023] The aforementioned forming mold allows for the continuous bending of a side beam plate, which can then be directly fed into the next process without the need for temporary storage at the work site. This solves the problem of poor yield caused by material mixing in traditional methods. Furthermore, since a single forming mold can be used to bend the side beam plate, the number of molds required is reduced, lowering mold manufacturing costs and the workload of disassembling and reassembling the molds on the press, thus significantly improving production efficiency.

[0024] The technical solution provided in this embodiment uses a lower mold with a first workpiece groove and a second workpiece groove. The shape of the inner wall of the first workpiece groove matches the shape of the part of the bogie side beam plate that needs to be bent for the first time. The shape of the inner wall of the second workpiece groove matches the shape of the part of the side beam plate that needs to be bent for the second time. The upper mold has a first protrusion and a second protrusion. The surface shape of the first protrusion matches the inner wall of the first workpiece groove, and the surface shape of the second protrusion matches the inner wall of the second workpiece groove. This can reduce the occupation of working space, improve the yield rate, and reduce production costs.

[0025] Based on the above technical solution, this embodiment provides an implementation method in which the first workpiece groove 11 and the second workpiece groove 12 are arranged side by side in the middle of the lower mold 1. Mold closing guide grooves 13 are respectively provided on the opposite two side edges of the lower mold 1. Correspondingly, mold closing guide blocks 23 are provided on the corresponding two sides of the upper mold 2, and the position, size, and shape of the mold closing guide blocks 23 match the mold closing guide grooves 13. During the downward movement of the upper mold 2, the mold closing guide blocks 23 are inserted into the mold closing guide grooves 13 and move within them. The two work together to guide the mold during the mold closing process, achieving accurate mold closing.

[0026] The two end sidewalls of the first workpiece groove 11 are inwardly recessed first forming arcs 14, and the curvature of the first forming arcs 14 is consistent with the curvature of the two end bending areas (first forming part 31) of the side beam plate 3.

[0027] The aforementioned forming arc and guide arc can be set according to the specific shape of the side beam plate, and are not limited to the figures in this embodiment.

[0028] A first clamping mechanism is provided in the middle of the first workpiece groove 11. The first clamping mechanism is used to support the middle of the side beam plate 3. The first clamping mechanism includes a first air pressure pad 15 and a first air pressure cylinder 16. The first air pressure cylinder 16 is disposed on the bottom surface of the first workpiece groove 11 and is perpendicular to the bottom surface of the first workpiece groove 11. There are multiple first air pressure cylinders 16, which are distributed in the first workpiece groove 11 to support different positions of the side beam plate 3.

[0029] The first air pressure pad 15 is disposed on the top of the first air pressure cylinder 16. The outer surface of the first air pressure pad 15 is provided with a first positioning protrusion 151 and a first anti-rotation protrusion 152. The first positioning protrusion 151 is inserted into the positioning hole in the middle of the side beam plate 3 to position the side beam plate 3. The first anti-rotation protrusion 152 is correspondingly inserted into the anti-rotation hole in the middle of the side beam plate 3. The cooperation between the first positioning protrusion 151 and the first anti-rotation protrusion 152 and the side beam plate prevents the side beam plate 3 from rotating horizontally during the forming process. There can be two first anti-rotation protrusions 152, arranged on both sides of the first positioning protrusion 151.

[0030] like Figure 9 As shown, the inner side of the first air pressure cushion 15 is provided with a plurality of first cylinder support grooves 153, and the telescopic rod of the first air pressure cylinder 16 abuts against the first cylinder support groove 153 to push the first air pressure cushion 15 up and down.

[0031] Correspondingly, in the upper mold 2, the first protrusion 21 is roughly a cuboid structure, and its two end sidewalls are outwardly protruding first guide arcs 24. The curvature of the first guide arc 24 is consistent with the curvature of the first forming arc 14, and also consistent with the curvature of the bending areas at both ends of the side beam plate 3.

[0032] Based on the above technical solution, the two end sidewalls of the second workpiece groove 12 are inwardly recessed second forming arcs 18, and the curvature of the second forming arcs 18 is consistent with the curvature of the middle bending area (second forming part 32) of the side beam plate 3.

[0033] A second clamping mechanism is provided within the second workpiece groove 12, which supports the middle portion of the side beam plate 3. The second clamping mechanism includes a second air pressure pad 19 and a second air pressure cylinder 110. The second air pressure cylinder 110 is located on the bottom surface of the second workpiece groove 12 and is perpendicular to the bottom surface of the second workpiece groove 12. Multiple second air pressure cylinders 110 are distributed within the second workpiece groove 12 to support different positions of the side beam plate 3.

[0034] The second air pressure pad 19 is disposed on the top of the second air pressure cylinder 110. The outer surface of the second air pressure pad 19 is provided with a second positioning protrusion 191 and a second anti-rotation protrusion 192. The second positioning protrusion 191 is inserted into the positioning hole in the middle of the side beam plate 3 to position the side beam plate 3. The second anti-rotation protrusion 192 is correspondingly inserted into the anti-rotation hole in the middle of the side beam plate 3. The cooperation between the second positioning protrusion 191 and the second anti-rotation protrusion 192 and the side beam plate prevents the side beam plate 3 from rotating horizontally during the forming process. There can be two second anti-rotation protrusions 192, arranged on both sides of the second positioning protrusion 191.

[0035] like Figure 10 As shown, the inner side of the second air pressure cushion 19 is provided with a plurality of second cylinder support grooves 193, and the telescopic rod of the second air pressure cylinder 110 abuts against the second cylinder support groove 193 to push the second air pressure cushion 19 up and down.

[0036] Correspondingly, in the upper mold 2, the second protrusion 22 is roughly a cuboid structure, with its two end sidewalls being outwardly protruding second guide arcs 25. The curvature of the second guide arc 25 is consistent with the curvature of the second forming arc 18, and also consistent with the curvature of the middle bending area of ​​the side beam plate 3.

[0037] Along the width direction of the side beam plate 3, the first forming arc 14 may have a curvature change, and the first guide arc 24 is set accordingly; the second forming arc 18 may have a curvature change, and the second guide arc 25 is set accordingly.

[0038] Specifically, in the one-time forming process, in the lower mold 1, the relationship between the edge curvature a1 and the middle curvature b1 of the first forming arc 14 is: a1 = b1 < one-time forming arc of the side beam plate. In the upper mold 2, the relationship between the edge curvature a2 and the middle curvature b2 of the first guide arc 24 is: a2 = b2 < one-time forming arc of the side beam plate.

[0039] During the secondary forming process, in the lower mold 1, the springback amount is small at two abrupt break points along the length of the second forming arc 18 on one side, and the arc diameter is close to the product arc. On the other side, the springback amount is large at the non-abrupt break points along the length. Therefore, the arc size should be far away from the product size. That is, the edge curvature c1 and the middle curvature d1 of the second forming arc 18 in the lower mold should satisfy c1 < d1 < the secondary forming arc of the side beam plate. The edge curvature c2 and the middle curvature d3 of the second guide arc 25 in the upper mold should satisfy c2 < d2 < the secondary forming arc of the side beam plate.

[0040] In the above scheme, the first pneumatic cylinder 16 is a nitrogen cylinder, and the second pneumatic cylinder 110 can also be a nitrogen cylinder, with nitrogen as the working gas to generate the driving force. Replacing the steel spring in the traditional scheme with a nitrogen cylinder as the support component solves the problem of poor stability of the pressure force of the pneumatic pad. The gentle elastic change of the nitrogen cylinder improves the lateral stiffness and positioning ability of the pneumatic pad, ensuring accurate pad positioning and improving product molding quality.

[0041] The lower mold 1 and the upper mold 2 can be made of casting. The bottom surface of the lower mold 1 is also provided with multiple weight reduction holes 17. The weight reduction holes 17 are arranged at the position where the first pneumatic cylinder 16 is not installed, so as to realize the lightweight design of the mold.

[0042] A limiting block 111 is set at the top of the lower mold 1, and a corresponding limiting groove is set on the upper mold 2. During the mold closing process, the limiting block 111 is inserted into the limiting groove. The length of the limiting block matches the depth of the limiting groove to limit the upper mold from being excessively squeezed during the mold closing process, thereby preventing excessive deformation of the side beam plate and ensuring product quality.

[0043] The above solution only requires flipping the side beam plate once to achieve both primary and secondary forming, which greatly improves forming efficiency, shortens the forming process, and reduces the difficulty of storing the side beam plate.

[0044] Based on the above technical solution, this embodiment also provides a method for manufacturing a bogie side beam using the above-mentioned forming mold, including: Step 1: Install the lower mold and upper mold from the forming mold onto the press and lock them in place so that the lower mold and upper mold are in the open state.

[0045] Step two: Place the bogie side beam plate into the first workpiece slot of the forming mold. (Example) Figure 11 As shown, the side beam plate 3 is flat and is placed in the first workpiece groove 11. The first air pressure cushion 15 supports the middle part of the side beam plate 3, and the two ends of the side beam plate 3 are supported by the lower mold.

[0046] Step 3: Start the press, moving the upper mold 2 until its first protrusion 21 contacts the side beam plate 3. Continue moving downwards until the upper mold 2 and lower mold 1 close, completing one forming operation. Figure 12 As shown. The press can use a four-column hydraulic cylinder to push the upper mold 2 up and down.

[0047] Step four: After one forming process, move the upper mold 2 upwards to the open mold position, as shown below. Figure 13 As shown.

[0048] In this step, the first clamping mechanism is also activated to lift the side beam plate 3, causing the side beam plate 3 to disengage from the first workpiece groove 11, such as... Figure 14 As shown.

[0049] Then, the side beam plate 3, which has been formed in one step, is flipped up and down and placed into the second workpiece slot 12 of the forming mold, as shown. Figure 15 As shown.

[0050] Step 5: Start the press, moving the upper mold 2 until the second protrusion 22 of the upper mold 2 contacts the side beam plate 3, and continue moving downwards until the upper mold 2 and the lower mold 1 close, completing the secondary forming. Figure 16 As shown.

[0051] After the secondary forming, the upper mold 2 is moved upwards to the open mold state, as follows: Figure 17 As shown.

[0052] Then, the second clamping mechanism is activated to lift the side beam plate 3, causing it to disengage from the second workpiece groove 12. Figure 18 As shown.

[0053] This embodiment also provides a bogie side beam, which is manufactured using any of the forming molds described above, or manufactured using the methods described above. The side beam provided in this embodiment has the same technical effects as the forming molds described above.

[0054] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0058] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A forming mold for a bogie side beam, characterized in that, include: Lower mold; the lower mold is provided with a first workpiece groove and a second workpiece groove; The shape of the inner wall of the first workpiece groove matches the shape of the part of the bogie side beam plate that needs to be bent for the first time; the shape of the inner wall of the second workpiece groove matches the shape of the part of the side beam plate that needs to be bent for the second time. The upper mold is provided with a first protrusion and a second protrusion; the surface shape of the first protrusion matches the inner wall of the first workpiece groove, and the surface shape of the second protrusion matches the inner wall of the second workpiece groove.

2. The forming mold according to claim 1, characterized in that, The first workpiece groove and the second workpiece groove are arranged side by side in the middle of the lower mold; the opposite two sides of the lower mold are respectively provided with mold closing guide grooves, which are used to match the mold closing guide blocks provided on both sides of the upper mold.

3. The forming mold according to claim 1, characterized in that, The first workpiece groove is provided with a first clamping mechanism in the middle, which is used to support the middle of the bogie side beam plate; the two end side walls of the first workpiece groove are first shaped arcs that are recessed inward. The two end sidewalls of the first protrusion are outwardly protruding first guide arcs; the curvature of the first guide arc is consistent with the curvature of the first forming arc, and also consistent with the curvature of the bending areas at both ends of the side beam plate.

4. The forming mold according to claim 3, characterized in that, The first tightening mechanism includes: The first air pressure cushion; the outer side of the first air pressure cushion is provided with a first positioning protrusion and a first anti-rotation protrusion for positioning with the side beam plate; the inner side of the first air pressure cushion is provided with multiple first cylinder support grooves; The first pneumatic cylinder is located on the bottom surface of the first workpiece groove; the telescopic rod of the first pneumatic cylinder abuts against the first cylinder support groove to push the first pneumatic pad up and down.

5. The forming mold according to claim 1, characterized in that, The second workpiece groove is equipped with a second clamping mechanism, which is used to support the middle part of the bogie side beam; the two end side walls of the second workpiece groove are inwardly recessed second forming arcs. The two end walls of the second protrusion are outwardly protruding second guide arcs; The curvature of the second guide arc is consistent with the curvature of the second forming arc, and also consistent with the curvature of the central bending region of the side beam plate.

6. The forming mold according to claim 5, characterized in that, The second tightening mechanism includes: The second air pressure pad; the outer side of the second air pressure pad is provided with a second positioning protrusion and a second anti-rotation protrusion for positioning with the side beam plate; the inner side of the second air pressure pad is provided with multiple second cylinder support grooves; The second pneumatic cylinder is located on the bottom surface of the second working groove; the telescopic rod of the second pneumatic cylinder abuts against the second cylinder support groove to push the second pneumatic pad up and down.

7. The forming mold according to claim 4 or 7, characterized in that, The first pressure cylinder is a nitrogen cylinder; the second pressure cylinder is a nitrogen cylinder.

8. A method for manufacturing a bogie side beam using the forming mold according to any one of claims 1-7, characterized in that, include: Install the lower mold and the upper mold of the forming mold onto the press respectively, so that the lower mold and the upper mold are in the open state; Place the bogie side beam plate into the first workpiece slot of the forming mold; Start the press and move the upper mold until the first protrusion of the upper mold contacts the side beam plate. Continue to move downward until the upper mold and the lower mold close together to complete one forming process. After one forming, the upper mold is moved upward to the open mold state; the one-formed bogie side beam plate is flipped up and down and then placed into the second workpiece slot of the forming mold; Start the press, which moves the upper mold until the second protrusion of the upper mold contacts the side beam plate. Continue to move downwards until the upper mold and the lower mold close together, completing the secondary forming.

9. The manufacturing method according to claim 8, characterized in that, After one forming, it also includes: activating the first clamping mechanism to lift the side beam plate, so that the side beam plate is disengaged from the first workpiece groove; After the secondary forming, the process also includes: activating the second clamping mechanism to lift the side beam plate, causing the side beam plate to disengage from the second workpiece groove.

10. A bogie side beam, characterized in that, It is manufactured using the forming mold described in any one of claims 1-7, or by the method described in any one of claims 8 or 9.

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