New energy automobile aluminum material stretching and delaying structure device

Abstract

The application discloses a new energy automobile aluminum material stretching and delaying structure device, which comprises a male die mechanism and a female die, and aluminum alloy sheet is placed on the female die. The male die mechanism comprises a male die top plate, a male die, a stripping plate, a pressing plate, a first limiting column and a second limiting column. The pressing plate is elastically connected to the stripping plate through a second elastic component. The first cooling pipeline is arranged in the pressing plate. The first limiting column and the second limiting column are symmetrically arranged at both ends of the pressing plate. The first liquid inlet pipeline is arranged in the first limiting column. The liquid outlet position of the first liquid inlet pipeline corresponds to the first liquid inlet branch of the first cooling pipeline. The first liquid outlet pipeline is arranged in the second limiting column. The liquid inlet position of the first liquid outlet pipeline corresponds to the first liquid outlet branch of the first cooling pipeline. Compared with the prior art, the edge part of the aluminum alloy sheet is locally strengthened during stretching and forming, and the springback after stamping can be further controlled after the edge of the aluminum alloy sheet is strengthened.

Description

Technical Field

[0001] This invention relates to the field of aluminum vehicle component forming technology, and in particular to a device for a stretching and delaying structure of aluminum materials for new energy vehicles. Background Technology

[0002] With increasing demands for lightweighting in automobiles, aluminum sheets are being used more and more in automotive panel manufacturing. For example, Chinese patent CN1 15780640A discloses a stamping method for an aluminum rear door outer panel, comprising the following five steps: drawing, with a supplementary design for a shallow shell state in the B-pillar position of the rear door outer panel; trimming, removing waste material around the product in sequence; first shaping, designed as a clamping shaping process, not directly shaping to the finished product state, but shaping to the over-drawn state; second shaping, shaping from the finished state of the first shaping process to the stepped surface state; and flanging, either straight flanging at 0 degrees according to the stamping direction or oblique flanging designed according to the pressing angle requirements, to complete the stamping of the aluminum rear door outer panel. The stamping method for the aluminum rear door outer panel of the automobile in this application, by designing a process supplement of drawing shallow shell shape and two forming processes, firstly clamping and forming the material to the over-drawing state, and secondly directly forming the product, solves the problem of cracking and wrinkling on the B-pillar step surface of the aluminum rear door outer panel, has better springback control, and can obtain better surface quality.

[0003] Because aluminum alloys have low elongation, they are prone to cracking and springback after forming during conventional stamping and stretching. Therefore, some forming dies use a method of heating the aluminum alloy before stamping and stretching. However, such forming dies simply heat and form the aluminum alloy sheet as a whole, and cannot strengthen local areas of the aluminum alloy sheet during the forming process. As a result, the aluminum alloy sheet cannot achieve different properties in different areas according to requirements, and springback after stamping cannot be effectively controlled. Summary of the Invention

[0004] The purpose of this invention is to provide a stretching and delay structure device for aluminum materials in new energy vehicles. During the stretching process, the edge of the aluminum alloy sheet is locally strengthened, so that the edge area and the central area of ​​the aluminum alloy sheet can have different characteristics according to the requirements. After strengthening the edge of the aluminum alloy sheet, the springback after stamping can be further controlled.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a stretching and delay structure device for aluminum materials in new energy vehicles, comprising: a punch mechanism and a die, an aluminum alloy sheet placed on the die, a forming groove provided on the die, a first heating element provided inside the die, the punch mechanism comprising a punch top plate, a punch, a stripper plate, a pressure plate, a first limiting post and a second limiting post, the punch being fixedly mounted on the punch top plate, the punch position corresponding to the forming groove, a second heating element provided inside the punch, the stripper plate being elastically connected to the punch top plate via a first elastic component, the pressure plate being elastically connected to the stripper plate via a second elastic component, and the punch being sequentially inserted through the stripper plate and the pressure plate from top to bottom. The pressure plate has a first cooling pipe inside. The pressure plate has a first limiting post and a second limiting post symmetrically arranged at both ends. The first limiting post is fixedly installed on the stripper plate and contacts the side of the stripper plate. The first limiting post has a first liquid inlet pipe inside and the liquid outlet of the first liquid inlet pipe corresponds to the first liquid inlet branch of the first cooling pipe. The second limiting post is fixedly installed on the stripper plate and contacts the side of the stripper plate. The second limiting post has a first liquid outlet pipe inside and the liquid outlet of the first liquid outlet pipe corresponds to the first liquid outlet branch of the first cooling pipe. The punch top plate has an upper limiting post and the die has a lower limiting post whose position corresponds to the upper limiting post.

[0006] As a further description of the above technical solution:

[0007] The first liquid inlet branch is arranged at an angle downwards from the side of the stripper plate.

[0008] As a further description of the above technical solution:

[0009] The first liquid outlet branch is arranged at an angle downwards from the side of the discharge plate.

[0010] As a further description of the above technical solution:

[0011] A first groove is provided on the end face of the pressure plate, which corresponds to the position of the first limiting post, and the first limiting post is slidably connected in the first groove.

[0012] As a further description of the above technical solution:

[0013] A second sliding groove is provided on the end face of the pressure plate, which corresponds to the position of the second limiting post, and the second limiting post is slidably connected in the second sliding groove.

[0014] As a further description of the above technical solution:

[0015] The back of the pressure plate is provided with two guards, which are symmetrically arranged on both sides of the pressure plate.

[0016] As a further description of the above technical solution:

[0017] The flange is detachably mounted on the back of the pressure plate.

[0018] As a further description of the above technical solution:

[0019] The flange is slidably connected to the pressure plate.

[0020] As a further description of the above technical solution:

[0021] The pressure plate is equipped with a slide rail, the cross-section of which is "T" shaped, and a third slide groove with a matching shape is provided on the side.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. In this invention, the first and second limiting posts, on the one hand, prevent the elastically connected pressure plate from shifting position, and on the other hand, through the internally provided first inlet and first outlet pipes, allow the cooling medium to be fed into and discharged from the first cooling pipe within the pressure plate. The flow of the cooling medium within the aforementioned cooling medium circulation pipe can cool the edge area of ​​the aluminum alloy sheet during stretching and forming, thereby strengthening the edge area of ​​the aluminum alloy sheet. Furthermore, in the open mold state, the outlet of the first inlet pipe within the first limiting post is sealed by the side end face of the pressure plate, and the end of the first inlet branch is sealed by the side of the first limiting post, preventing debris from entering the cooling medium circulation pipe.

[0024] 2. In this invention, the pressure plate is elastically connected to the stripper plate, which, on the one hand, works with the first and second limiting posts to achieve a constant pressing force; on the other hand, it enables delayed separation of the aluminum alloy sheet when the mold is opened, ensuring that the aluminum alloy sheet is separated from the punch.

[0025] 3. In this invention, the edge portion of the aluminum alloy sheet is locally strengthened during stretching, so that the aluminum alloy sheet can achieve different characteristics in the edge area and the central area according to the requirements. Strengthening the edge of the aluminum alloy sheet can further control the springback after stamping. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a stretching and delay structure device for aluminum materials in new energy vehicles.

[0028] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 3 This is a schematic diagram of the initial contact between the pressure plate and the aluminum alloy sheet in a stretching and delay structure device for aluminum materials in new energy vehicles.

[0030] Figure 4 This is a schematic diagram of the stripper plate descending to its limit position in a stretching and delay structure device for aluminum materials in new energy vehicles.

[0031] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.

[0032] Figure 6 This is a schematic diagram of the stretching and forming of aluminum alloy sheets in a stretching and delay structure device for aluminum materials in new energy vehicles.

[0033] Figure 7 This is a schematic diagram of the pressure plate in a stretching and delay structure device for aluminum materials in new energy vehicles.

[0034] Legend:

[0035] 1. Punch mechanism; 11. Punch top plate; 12. Punch; 13. Stripper plate; 131. First elastic component; 14. Pressure plate; 141. Second elastic component; 142. First cooling pipe; 1421. First liquid inlet branch; 1422. First liquid outlet branch; 143. First slide groove; 144. Side rail; 145. Slide rail; 15. First limiting post; 151. First liquid inlet pipe; 16. Second limiting post; 161. First liquid outlet pipe; 17. Upper limiting post; 2. Die; 21. Forming groove; 22. Lower limiting post; 3. Aluminum alloy sheet. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] Please see Figure 1-7This invention provides a technical solution: a stretching and delay structure device for aluminum materials in new energy vehicles, comprising: a punch mechanism 1 and a die 2, an aluminum alloy sheet 3 placed on the die 2, a forming groove 21 provided on the die 2, and a first heating element provided inside the die 2. The punch mechanism 1 includes a punch top plate 11, a punch 12, a stripper plate 13, a pressure plate 14, a first limiting post 15, and a second limiting post 16. The punch 12 is fixedly installed on the punch top plate 11, and the position of the punch 12 corresponds to the forming groove 21. A second heating element is provided inside the punch 12. The stripper plate 13 is elastically connected to the punch top plate 11 through a first elastic member 131, and the pressure plate 14 is elastically connected to the stripper plate 13 through a second elastic member 141. The punch 12 passes through the stripper plate 13 and the pressure plate 14 sequentially from top to bottom. A first limiting post 15 is provided inside the pressure plate 14. A cooling pipe 142 is provided. The pressure plate 14 is provided with a first limiting post 15 and a second limiting post 16 symmetrically arranged at both ends. The first limiting post 15 is fixedly installed on the stripper plate 13 and contacts the side of the stripper plate 13. A first liquid inlet pipe 151 is provided inside the first limiting post 151. The liquid outlet position of the first liquid inlet pipe 151 corresponds to the first liquid inlet branch 1421 of the first cooling pipe 142. The second limiting post 16 is fixedly installed on the stripper plate 13 and contacts the side of the stripper plate 13. A first liquid outlet pipe 161 is provided inside the second limiting post 16. The liquid outlet position of the first liquid outlet pipe 161 corresponds to the first liquid outlet branch 1422 of the first cooling pipe 142. An upper limiting post 17 is provided on the punch top plate 11, and a lower limiting post 22 corresponding to the upper limiting post 17 is provided on the die 2.

[0039] The first liquid inlet branch 1421 is arranged at an angle downward from the side of the stripper plate 13, which effectively prevents the cooling medium from leaking out from the first liquid inlet pipe 151 when the first liquid inlet pipe 151 and the first liquid inlet branch 1421 are misaligned.

[0040] The first liquid outlet branch 1422 is arranged at an angle downwards from the side of the stripper plate 13 to avoid leakage of the cooling medium. The principle is the same as that of the first liquid inlet branch 1421.

[0041] The pressure plate 14 has a first groove 143 on its end face, corresponding to the position of the first limiting post 15, and the first limiting post 15 is slidably connected in the first groove 143. The pressure plate 14 also has a second groove on its end face, corresponding to the position of the second limiting post 16, and the second limiting post 16 is slidably connected in the second groove. The first groove 143 and the second groove at both ends of the pressure plate 14 effectively position the pressure plate 14, preventing horizontal displacement when the pressure plate 14 moves up and down or changes position. At the same time, it effectively aligns the outlet of the first liquid inlet pipe 151 with the first liquid inlet branch 1421 of the first cooling pipe 142, and the inlet of the first liquid outlet pipe 161 with the first liquid outlet branch 1422 of the first cooling pipe 142, ensuring the smooth flow of the cooling medium circulation pipe.

[0042] The back of the pressure plate 14 is provided with two baffles 144, which are symmetrically arranged on both sides of the pressure plate 14. One baffle 144 contacts the first limiting post 15 and the other baffle contacts the second limiting post 16. Without increasing the thickness of the pressure plate 14, the baffles 144 effectively seal the first liquid inlet pipe 151 and the first liquid outlet pipe 161, preventing foreign matter from entering the cooling medium circulation pipe.

[0043] The retaining edge 144 is detachably mounted on the back of the pressure plate 14. Specifically, the retaining edge 144 is slidably connected to the pressure plate 14. The pressure plate 14 is provided with a slide rail 145, the cross-section of which is "T" shaped. The retaining edge 144 is provided with a third sliding groove that matches the shape of the slide rail 145, thereby enabling the retaining edge 144 to be detachably installed. This facilitates the replacement and installation of retaining edges 144 of different heights, allowing the retaining edge 144 to effectively seal the first liquid inlet pipe 151 and the first liquid outlet pipe 161.

[0044] Working principle: The aluminum alloy sheet 3 is a room temperature aluminum alloy sheet in a solution-treated state. Before stretching and forming, the aluminum alloy sheet 3 is placed on the die 2. The die 2 is heated by the first heating element below the bottom surface of the forming groove 21 and the punch 12 is heated by the second heating element through resistance heating. The die 2 heats the aluminum alloy sheet 3 by radiation heating and the punch 12 heats the aluminum alloy sheet 3 by radiation heating. When the aluminum alloy sheet 3 in the area above the forming groove 21 reaches the aging temperature, stretching and forming begins.

[0045] During stretching, the punch mechanism 1 descends as a whole, and the pressure plate 14 first presses and contacts the aluminum alloy sheet 3. Then, the punch mechanism 1 continues to descend, the position of the pressure plate 14 remains unchanged, the second elastic component 141 is compressed, and the stripper plate 13 continues to descend until the first limit post 15 and the second limit post 16 abut against the die 2. The stripper plate 13 descends to the limit position, and the bottom of the punch 12 contacts the aluminum alloy sheet 3. At this time, the punch 12 continues to descend, and the position of the stripper plate 13 will not change again. The length of the second elastic component 141 is maintained, so that the pressing effect of the pressure plate 14 on the aluminum alloy sheet 3 remains unchanged, ensuring that the blank holder force is constant. Simultaneously, the outlet of the first inlet pipe 151 is aligned with the first inlet branch 1421 of the first cooling pipe 142, and the inlet of the first outlet pipe 161 corresponds to the first outlet branch 1422 of the first cooling pipe 142. This allows the cooling medium (cooling water or cooling oil) to enter the first cooling pipe 142 from the first inlet pipe 151 via the first inlet branch 1421, and the cooling medium in the first cooling pipe 142 can be discharged to the first outlet pipe 161 via the first outlet branch 1422. No cooling medium is introduced at this time, but if the cooling medium flows within the aforementioned cooling medium circulation pipe, it can cool the edge region of the aluminum alloy sheet 3, thereby strengthening the edge region of the aluminum alloy sheet 3.

[0046] Subsequently, the punch top plate 11 continues to descend, the stripper plate 13 remains in position, the first elastic component 131 is compressed, and the punch 12 stretches the aluminum alloy sheet 3 downwards until it reaches the upper limit post 17, which abuts against the lower limit post 22. The punch 12 then descends to its limit position, and in conjunction with the forming groove 21, stretches and shapes the aluminum alloy sheet 3, maintaining pressure. Simultaneously, the first limit post 15 and the second limit post 16 allow cooling medium to be introduced and discharged into the first cooling pipe 142 of the stripper plate 13, achieving cooling of the edge area of ​​the aluminum alloy sheet 3 and strengthening the edge area, effectively preventing springback of the aluminum alloy sheet 3 after stamping.

[0047] After the pressure holding is completed, the punch mechanism 1 moves upward to disengage from the die 2, and the formed aluminum alloy sheet 3 is taken out, ending the stretching and forming process. The formed aluminum alloy sheet 3 is then transferred to an aging furnace for artificial aging treatment.

[0048] The first limiting post 15 and the second limiting post 16, on the one hand, prevent the elastically connected pressure plate 14 from shifting position, and on the other hand, through the internally provided first liquid inlet pipe 151 and first liquid outlet pipe 161, allow the cooling medium to be sent into and discharged from the first cooling pipe 142 within the pressure plate 14. Furthermore, in the open mold state, the outlet of the first liquid inlet pipe 151 within the first limiting post 15 is sealed by the side end face of the pressure plate 14, and the end of the first liquid inlet branch 1421 is sealed by the side of the first limiting post 15, preventing debris from entering the cooling medium circulation pipe. The first liquid outlet pipe 161 of the second limiting post 16 is handled similarly.

[0049] The pressure plate 14 is elastically connected to the stripper plate 13. On the one hand, it works with the first limiting post 15 and the second limiting post 16 to achieve a constant pressing force; on the other hand, it enables delayed separation of the aluminum alloy sheet 3 when the mold is opened, ensuring that the aluminum alloy sheet 3 is separated from the punch 12.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A time-delay structure device for aluminum materials in new energy vehicles, characterized in that, include: A punch mechanism (1) and a die (2) are provided. An aluminum alloy sheet (3) is placed on the die (2). A forming groove (21) is provided on the die (2). A first heating element is provided inside the die (2). The punch mechanism (1) includes a punch top plate (11), a punch (12), a stripper plate (13), a pressure plate (14), a first limiting post (15), and a second limiting post (16). The punch (12) is fixedly installed on the punch top plate (11). The position of the punch (12) corresponds to the forming groove (21). The forming groove (21) is provided with a second heating element inside the punch (12). The stripper plate (13) is elastically connected to the top plate (11) of the punch via a first elastic member (131). The pressure plate (14) is elastically connected to the stripper plate (13) via a second elastic member (141). The punch (12) passes through the stripper plate (13) and the pressure plate (14) sequentially from top to bottom. The pressure plate (14) is provided with a first cooling pipe (142). 14) A first limiting post (15) and a second limiting post (16) are symmetrically arranged at both ends. The first limiting post (15) is fixedly installed on the stripper plate (13) and contacts the side of the pressure plate (14). A first liquid inlet pipe (151) is provided inside the first limiting post (15). The outlet position of the first liquid inlet pipe (151) corresponds to the first liquid inlet branch (1421) of the first cooling pipe (142). The second limiting post (16) The second limiting post (16) is fixedly installed on the stripper plate (13), and the second limiting post (16) contacts the side of the pressure plate (14). The second limiting post (16) is provided with a first liquid outlet pipe (161). The liquid inlet of the first liquid outlet pipe (161) corresponds to the first liquid outlet branch (1422) of the first cooling pipe (142). The punch top plate (11) is provided with an upper limiting post (17), and the die (2) is provided with a lower limiting post (22) whose position corresponds to the upper limiting post (17). The back of the pressure plate (14) is provided with two guard edges (144), and the two guard edges (144) are symmetrically arranged on both sides of the pressure plate (14); The flange effectively seals the first liquid inlet pipe and the first liquid outlet pipe to prevent foreign matter from entering the cooling medium circulation pipe; In the open mold state, the outlet of the first liquid inlet pipe inside the first limiting post is closed by the side end face of the pressure plate, and the end of the first liquid inlet branch is closed by the side of the first limiting post to prevent debris from entering the cooling medium circulation pipe.

2. The new energy vehicle aluminum material stretching and delay structure device according to claim 1, characterized in that, The first liquid inlet branch (1421) is arranged at an angle downward from the side of the stripper plate (13).

3. The new energy vehicle aluminum material stretching and delay structure device according to claim 2, characterized in that, The first liquid outlet branch (1422) is arranged at an angle downward from the side of the stripping plate (13).

4. The new energy vehicle aluminum material stretching and delay structure device according to claim 1, characterized in that, The end face of the pressure plate (14) is provided with a first groove (143) corresponding to the position of the first limiting post (15), and the first limiting post (15) is slidably connected in the first groove (143).

5. The new energy vehicle aluminum material stretching and delay structure device according to claim 4, characterized in that, The end face of the pressure plate (14) is provided with a second sliding groove corresponding to the position of the second limiting post (16), and the second limiting post (16) is slidably connected in the second sliding groove.

6. The new energy vehicle aluminum material stretching and delay structure device according to claim 1, characterized in that, The retaining edge (144) is detachably mounted on the back of the pressure plate (14).

7. The new energy vehicle aluminum material stretching and delay structure device according to claim 6, characterized in that, The retaining edge (144) is slidably connected to the pressure plate (14).

8. The new energy vehicle aluminum material stretching and delay structure device according to claim 7, characterized in that, The pressure plate (14) is provided with a slide rail (145), the cross-section of the slide rail (145) is "T" shaped, and the side guard (144) is provided with a third groove that matches the shape of the slide rail (145).

Images