Drawing forming die for lower cross beam of new energy automobile

Abstract

The invention relates to the field of new energy automobile lower cross beams, and particularly discloses a new energy automobile lower cross beam drawing forming die which comprises an operation table. The lower mold is installed on the operation table, and a lower forming cavity and a first annular groove are sequentially formed in the lower mold from inside to outside; the upper mold is arranged on the operation table above the lower mold in a liftable mode, and an upper forming cavity, a second annular groove and a third annular groove are sequentially formed in the upper mold from inside to outside; the annular cutter is coaxially arranged in the first annular groove in a liftable mode and used for cutting off redundant metal edges on the edge of the cross beam drawing part; the annular polishing mechanism is arranged on the inner wall of the annular cutter and used for polishing burrs on the edge of the cross beam drawing part subjected to edge cutting; the edge pressing pipe is coaxially arranged in the third annular groove in a lifting manner and is used for pressing the edge of the cross beam drawing part on the lower die when burrs are polished; and the dust collector is used for sucking away the grinding scraps in the first annular groove. The machining efficiency and the overall precision of products can be improved.

Description

Technical Field

[0001] This application relates to the field of lower crossbeams for new energy vehicles, and in particular to a drawing die for a lower crossbeam of a new energy vehicle. Background Technology

[0002] The lower crossbeam of a new energy vehicle is a crucial component of the vehicle's body structure, typically referring to the frame crossbeam at the bottom of the vehicle, which is part of the chassis. Connecting the left and right sides of the body, much like the beams of a house, the lower crossbeam enhances the overall rigidity of the vehicle body, reduces body deformation caused by uneven road surfaces, cornering, and other factors during driving, and improves the vehicle's driving stability and handling performance. In a collision, the lower crossbeam plays a role in dispersing and absorbing impact energy.

[0003] In related technologies, the core of the drawing process for the lower crossbeam of new energy vehicles is to process flat metal sheets (mostly aluminum alloys or high-strength steel) into three-dimensional components that meet the requirements of the chassis structure through four major stages: "sheet pretreatment → multi-station stamping → precision correction → post-processing", taking into account both strength and lightweight requirements.

[0004] The aforementioned technologies have the following drawbacks: In the multi-station stamping forming → precision correction process, after the forming die draws the metal sheet into a drawn part, the drawn part needs to be sent to the trimming die for stamping and trimming. Burrs are easily generated during the trimming process. In order to improve the processing accuracy, it is also necessary to change stations to grind the burrs.

[0005] In the above process, drawing, stamping, and burr removal all require constantly changing the processing position of the drawn part, repeatedly loading and unloading materials, and changing processing equipment. The process is complex and troublesome, and the product precision is low. Summary of the Invention

[0006] In order to improve the processing efficiency and overall precision of the product, this application provides a drawing die for the lower crossbeam of a new energy vehicle.

[0007] The technical solution adopted in this application for a drawing and forming die for the lower crossbeam of a new energy vehicle is as follows: A drawing die for the lower crossbeam of a new energy vehicle includes an operating table; A lower mold is installed on the operating table. The lower mold has a lower forming cavity and a first annular groove arranged sequentially from the inside to the outside. The upper mold is vertically mounted on the operating platform above the lower mold. The upper mold is provided with an upper forming cavity, a second annular groove and a third annular groove from the inside to the outside. An annular cutter is coaxially and vertically mounted in the first annular groove for removing excess metal edges from the edge of the crossbeam drawing. An annular grinding mechanism is located on the inner wall of the annular cutter and is used to grind burrs off the edges of the cut beam drawing. The edge-pressing tube is coaxially and vertically arranged in the third annular groove, used to press the edge of the crossbeam drawing onto the lower die when grinding burrs; A vacuum cleaner is used to remove grinding debris from the first annular groove.

[0008] Optionally, the outer ring sidewall of the second annular groove is coplanar with the outer ring sidewall of the first annular groove; The outer ring sidewall of the third annular groove is coplanar with the inner ring sidewall of the first annular groove; The cutting edge of the annular cutter is coplanar with the inner sidewall of the second annular groove.

[0009] Optionally, the inner wall of the annular cutter is provided with a coaxial annular groove; the annular grinding mechanism includes; Multiple grinding stone components are disposed within the annular groove and distributed circumferentially along the annular groove, and are slidably connected to the inner wall of the annular cutter through the annular groove.

[0010] Optionally, the annular grinding mechanism further includes; Multiple sliders are provided, each corresponding to one of the grinding stone components, and all are located within the annular groove. The side of each slider facing the lower forming cavity has a receiving groove. The grinding stone assembly is disposed in the corresponding receiving groove, and the grinding stone assembly includes: Multiple grinding stone strips are vertically arranged and distributed at intervals along the circumference of the annular groove, and are movably disposed within the receiving groove.

[0011] Optionally, the upper end face and the lower end face of the grinding stone strip are both rounded with the side of the grinding stone strip facing the lower forming cavity.

[0012] Optionally, the grinding stone assembly further includes; A rubber strip is disposed in the receiving groove along the circumference of the annular groove, and the rubber strip is slidably connected to the slider; The grinding stone strip is disposed on the side of the rubber strip facing the lower molding cavity.

[0013] Optionally, the grinding stone assembly further includes; The first slide block is installed in the middle of the rubber strip and is horizontally slidably connected to the slider in the radial direction of the annular groove; Two sets of second slide blocks are respectively installed at both ends of the rubber strip, and both the upper and lower ends of the second slide blocks are in contact with the slider.

[0014] Optionally, a first spring is connected between the first slide and the bottom of the receiving groove; A second spring is connected between the second slide and the bottom of the receiving groove.

[0015] Optionally, both the first slide and the second slide are magnetic components; An electromagnet is installed at the bottom of the receiving tank.

[0016] Optionally, the annular grinding mechanism further includes; A steel wire rope is sequentially connected to all the sliders, and each end of the steel wire rope is connected to a reciprocating moving device via an elastic rope. The reciprocating moving device is mounted on the lower mold.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. This application utilizes an innovative integrated structural design to highly integrate the three core processes of drawing, stamping trimming, and deburring into a single mold and workstation. This solves the core problems of traditional multi-station production processes, such as complex procedures, repeated loading and unloading, equipment changes, and low production efficiency. By integrating an adaptively adjustable annular grinding mechanism onto the annular cutter, along with a pressure tube and a dust collector, efficient and thorough grinding of the workpiece edges is achieved immediately after trimming, while automatically collecting waste chips. This not only significantly improves production efficiency and reduces equipment investment and operational complexity, but also effectively improves grinding consistency and processing accuracy through a double-protected elastic pressing grinding mechanism using the elastic force of the first spring, the elastic force of the second spring, and the electromagnetic repulsion of the electromagnet, ensuring the forming quality and efficiency of the beam-drawn parts' edges.

[0018] 2. In this application, by setting up an annular cutter and using a first reciprocating lifting component to drive it to rise precisely along the inner wall of the second annular groove, the workpiece can be trimmed immediately after drawing. This eliminates the step of moving the workpiece to a dedicated trimming mold, reduces the accuracy loss that may be caused by workpiece handling and secondary clamping, and ensures the quality of the trimmed edges.

[0019] 3. The ring-shaped grinding mechanism in this application is the core innovation of this solution, directly solving the problem of burr removal. The grinding component is integrated into the ring cutter, with a compact structure and no need for additional workstations. A reciprocating moving device pulls the steel wire rope back and forth, driving multiple sliders to move the grinding stone along the circumferential edge of the workpiece, achieving thorough grinding of the irregular circumferential edge of the workpiece without dead angles. The grinding stone component, through the cooperation of the first and second slides and the first and second springs, allows the grinding stone to adaptively extend and retract according to the irregular shape of the workpiece edge, ensuring uniform grinding pressure and sufficient contact. The rounded corners of the upper and lower end faces of the grinding stone effectively grind the junction of the upper and lower end faces and the cut surface of the crossbeam drawing part, which is the area prone to burr formation, and prevents the grinding stone from getting stuck, improving grinding quality. The repulsive force between the electromagnet and the magnetic first and second U-shaped seats provides a continuous and adjustable clamping force for the grinding stone, enhancing the grinding force and stability, especially for materials with high hardness, ensuring grinding effectiveness.

[0020] 4. This application features an independent edge-pressing tube. During the grinding process, after the upper mold is raised, the edge-pressing tube can descend independently to press the workpiece body, suspending the edge area to be ground. This provides ample and unobstructed operating space for the ring grinding mechanism, ensuring that the grinding action can be carried out fully and effectively.

[0021] 5. In this application, the vacuum cleaner and the vacuum pipe connected to the first annular groove can promptly remove metal shavings and dust generated during the cutting and grinding process, keep the mold cavity clean, prevent waste from affecting the processing accuracy or damaging the mold surface, and improve the working environment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional structural diagram of an embodiment of this application; Figure 3 This is a top-view diagram showing the exploded structure of the upper and lower molds; Figure 4 This is a bottom view of the exploded structure of the upper and lower molds; Figure 5 This is a schematic diagram of the ring-shaped grinding mechanism; Figure 6 This is a schematic diagram of the grinding stone assembly; Figure 7 This is an exploded structural diagram of the grinding stone components.

[0024] Figure label: 10. Control panel; 1. Lower mold; 11. Lower forming cavity; 12. First annular groove; 13. Draw bead; 2. Upper mold; 21. Upper forming cavity; 22. Second annular groove; 23. Third annular groove; 3. Circular cutter; 31. Blade; 32. Blade edge; 301, Annular groove; 3011, Rope hole; 33. First reciprocating lifting component; 331. Sliding connecting rod; 4. Circular grinding mechanism; 41. Slider; 4101. Receiving groove; 42. Grinding stone assembly; 420. Rubber strip; 421. First U-shaped seat; 422. Second U-shaped seat; 423. Grinding stone strip; 424. First spring; 425. Second spring; 426. Electromagnet; 43. Steel wire rope; 44. Elastic rope; 45. Reciprocating motion device; 5. Edge pressing tube; 51. Second reciprocating lifting component; 6. Vacuum cleaner. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0026] This application discloses a drawing die for the lower crossbeam of a new energy vehicle.

[0027] Reference Figure 1 and Figure 2 A new energy vehicle lower crossbeam drawing forming die includes an operating table 10.

[0028] Reference Figure 2 , Figure 3 and Figure 4 The lower mold 1 is installed on the operating table 10. The lower mold 1 is provided with a lower forming cavity 11 and a first annular groove 12 coaxial with the lower forming cavity 11. The first annular groove 12 is located outside the lower forming cavity 11. Reference Figure 2 , Figure 3 and Figure 4The upper mold 2 is mounted on an operating platform 10 above the lower mold 1 and can be raised and lowered. The upper mold 2 has an upper forming cavity 21 and a second annular groove 22 and a third annular groove 23 coaxial with the upper forming cavity 21. The second annular groove 22 is located outside the upper forming cavity 21, and the third annular groove 23 is located outside the second annular groove 22. The outer ring sidewall of the second annular groove 22 is coplanar with the outer ring sidewall of the first annular groove 12, and the outer ring sidewall of the third annular groove 23 is coplanar with the inner ring sidewall of the first annular groove 12. The upper mold 2 and the lower mold 1 are closed to process the metal sheet into a crossbeam drawing part with excess metal edges. In order to improve the forming accuracy of the crossbeam drawing part, a drawing rib 13 is also provided between the upper mold 2 and the lower mold 1. The upper mold 2 can be raised and lowered in a conventional manner that meets production requirements.

[0029] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, the operating table 10, the lower mold 1, and the upper mold 2 constitute the basic frame and forming body of the mold. By setting coaxial lower forming cavity 11, upper forming cavity 21, and matching first annular groove 12, second annular groove 22, and third annular groove 23, precise structural space is reserved for subsequent edge trimming, grinding, and edge pressing processes. The draw bead 13 enhances the flow control of the sheet metal during the drawing process, improving the forming accuracy and surface quality of the drawn parts.

[0030] Reference Figure 2 , Figure 3 and Figure 4 The annular cutter 3 is coaxially and vertically mounted in the first annular groove 12, used to cut off excess metal edges of the crossbeam drawing. Specifically, the lower end blade 31 of the annular cutter 3 is provided with multiple vertically arranged sliding links 331. The multiple sliding links 331 are evenly spaced along the circumference of the annular cutter 3. The multiple sliding links 331 are vertically slidably connected to the lower mold 1. A first reciprocating lifting component 33 is installed below the lower mold 1 to drive the multiple sliding links 331 to rise and fall synchronously. The first reciprocating lifting component 33 can be a conventional reciprocating lifting device that meets production standards, such as a stamping machine. The second annular groove 22 provides travel space for the annular cutter 3 to rise and fall. When cutting the edge of the crossbeam drawing, the blade 32 of the annular cutter 3 rises along the inner ring side wall of the second annular groove 22, cuts off the excess edge of the crossbeam drawing, and then returns to its original position.

[0031] Reference Figure 2 , Figure 3 and Figure 4In this embodiment, the annular cutter 3, as one of the core execution components, enables precise trimming directly at the forming station. Driven by the first reciprocating lifting member 33, the cutting edge 32 rises along the inner wall of the second annular groove 22 to complete the trimming, eliminating the need to transfer the semi-finished product to a dedicated trimming mold, greatly shortening the processing cycle and reducing the accuracy loss that may occur due to workpiece handling and repeated positioning.

[0032] Reference Figure 2 , Figure 3 and Figure 4 The annular grinding mechanism 4 is coaxially mounted on the blade 31 of the annular cutter 3. The annular grinding mechanism 4 is used to grind the edge of the crossbeam drawing after cutting, remove burrs, and smooth the edge of the crossbeam drawing.

[0033] Reference Figure 2 , Figure 3 and Figure 4 Specifically, the inner wall of the blade 31 is provided with a coaxial annular groove 301. The annular grinding mechanism 4 includes multiple sliders 41 and multiple grinding stone components 42 corresponding to each slider 41. The multiple sliders 41 are slidably connected to the annular groove 301, and the multiple sliders 41 are evenly spaced along the circumference of the annular groove 301. The side of the slider 41 facing the lower forming cavity 11 is provided with a receiving groove 4101, and the grinding stone component 42 is disposed in the receiving groove 4101 corresponding to the slider 41.

[0034] Reference Figure 3 , Figure 5 , Figure 6 and Figure 7 The grinding stone assembly 42 includes: a rubber strip 420, which is circumferentially disposed in a receiving groove 4101 along an annular groove 301; a first slide block disposed in the receiving groove 4101, the first slide block being installed in the middle of the rubber strip 420 and horizontally slidably connected to the receiving groove 4101 in the radial direction of the annular groove 301, and a first spring 424 connecting the first slide block and the bottom of the receiving groove 4101; and two sets of second slide blocks, which are respectively installed at both ends of the rubber strip 420, the second slide blocks being disposed in the receiving groove 4101, and both the upper and lower ends of the second slide blocks contacting the side wall of the receiving groove 4101, and a second spring 425 connecting the second slide block and the bottom of the receiving groove 4101.

[0035] Reference Figure 5 , Figure 6 and Figure 7The inner side of the rubber strip 420 is provided with multiple vertically arranged grinding stone strips 423. Here, the inner side of the rubber strip 420 is the side of the rubber strip 420 facing the lower forming cavity 11. The multiple grinding stone strips 423 are evenly spaced along the circumference of the annular groove 301. The upper end face and the lower end face of the grinding stone strip 423 are rounded at the corners facing the lower forming cavity 11. The purpose of rounding the corners is to prevent the grinding stone strip 423 from being stuck by the crossbeam drawing part when it moves up and down, and to allow the grinding stone strip 423 to fully grind the edge of the crossbeam drawing part through the rounded corners. For example, since the grinding stone strip 423 can adaptively extend and retract under the elastic force of the first spring 424 or the second spring 425, and then elastically abut against the edge of the crossbeam drawing part, the burrs at the junction of the upper and lower end faces of the crossbeam drawing part and the cutting surface of the annular cutter 3 can also be contacted and ground by the grinding stone strip 423. In this application, the end of the grinding stone 423 facing the lower forming cavity 11 is a vertically arranged semi-circular plate. In addition, in order for the grinding stone 423 to press more forcefully against the edge of the crossbeam drawing part, an electromagnet 426 is provided at the bottom of the receiving groove 4101. The first slide and the second slide are both magnetic components. Under the repulsive force between the electromagnet 426 and the magnetic components, the first slide and the second slide can push the grinding stone 423 toward the crossbeam drawing part.

[0036] Reference Figure 5 , Figure 6 and Figure 7 During the lifting and lowering process of the first reciprocating lifting component 33 driving the annular cutter 3, the annular cutter 3 carries the annular grinding mechanism 4 and reciprocates, causing the grinding stone strip 423 to move up and down to grind the edge of the crossbeam drawing. Under the elastic force of the first spring 424 or the second spring 425, the grinding stone strip 423 can adaptively move according to the edge shape of the crossbeam drawing and elastically contact the edge of the crossbeam drawing. Under the repulsive force between the electromagnet 426 and the magnetic components (first slide block and second slide block), the first slide block and the second slide block push the grinding stone strip 423 to press more forcefully against the edge of the crossbeam drawing, improving the grinding force and effectiveness, and avoiding grinding failure due to insufficient pressure of the grinding stone strip 423. At the same time, multiple sliders 41 move synchronously back and forth along the annular groove 301, so that the grinding stone strip 423 can grind the crossbeam drawing in the circumferential direction, avoiding dead corners.

[0037] Reference Figure 5 , Figure 6 and Figure 7The annular grinding mechanism 4 also includes a steel wire rope 43, which is arranged along the length of the annular groove 301. The middle part of the steel wire rope 43 is connected to all the sliders 41 in sequence. Both ends of the steel wire rope 43 are connected to a reciprocating moving device 45. The reciprocating moving device 45 is installed on the lower mold 1. The steel wire rope 43 is driven by the reciprocating moving device 45 to pull the sliders 41 back and forth. Specifically, in this application, both ends of the steel wire rope 43 are connected to a reciprocating moving device 45 through an elastic rope 44. The reciprocating moving device 45 is installed on the lower mold 1. The blade 31 and the lower mold 1 are provided with rope holes 3011 for the steel wire rope 43 and / or the elastic rope 44 to pass through. Here, the reciprocating moving device 45 can be a reciprocating telescopic cylinder, an electric reel that can wind and unwind, or any other device that can drive the steel wire rope 43 to move back and forth.

[0038] Reference Figure 5 , Figure 6 and Figure 7 In this embodiment, the annular grinding mechanism 4 is the core innovation of the solution, directly solving the problem of burr removal. Firstly, the grinding components are integrated onto the annular cutter 3, resulting in a compact structure and eliminating the need for additional workstations. Secondly, the reciprocating motion device 45 pulls the steel wire rope 43, thereby driving multiple sliders 41 to move the grinding stone strip 423 circumferentially along the workpiece edge, achieving thorough grinding of the irregular circumferential edge of the workpiece without dead angles. Thirdly, the grinding stone assembly 42, through the cooperation of the first slide, the second slide, the first spring 424, and the second spring 425, allows the grinding stone strip 423 to adaptively extend and retract according to the irregular shape of the workpiece edge, ensuring uniform grinding pressure and sufficient contact. Fourthly, the rounded corners on the upper and lower end faces of the grinding stone strip 423 enable it to effectively grind the junction of the upper and lower end faces and the cut surface of the crossbeam drawing part, i.e., the area prone to burr formation, and prevent the grinding stone strip 423 from jamming, thus improving the grinding quality. Fifth, the repulsive force between the electromagnet 426 and the magnetic first U-shaped seat 421 and second U-shaped seat 422 provides a continuous and adjustable clamping force for the grinding stone strip 423, enhancing the grinding strength and stability, especially for materials with high hardness, ensuring the effectiveness of grinding.

[0039] Reference Figure 2 , Figure 3 and Figure 4The pressing tube 5 is coaxially and liftably installed in the third annular groove 23. It is used to press the edge of the crossbeam drawing part down onto the lower mold 1 inside the first annular groove 12. Specifically, the upper end of the pressing tube 5 is connected to the upper mold 2 by a second reciprocating lifting component 51. The second reciprocating lifting component 51 can be any conventional device that can drive the pressing tube 5 to rise or fall, such as a telescopic cylinder. When the annular grinding mechanism 4 grinds the edge of the crossbeam drawing part, it is necessary for the annular grinding mechanism 4 to make full contact with the edge of the crossbeam drawing part. At this time, in order to avoid the upper mold 2 from obstructing the effective contact between the annular grinding mechanism 4 and the edge of the crossbeam drawing part, the upper mold 2 needs to rise away from one end of the lower mold 1. Then the pressing tube 5 descends to press the edge of the crossbeam drawing part down onto the lower mold 1 inside the first annular groove 12. At this time, the edge of the crossbeam drawing part is suspended in the groove opening of the first annular groove 12, and the upper and lower parts of this part of the crossbeam drawing part are not directly contacted or blocked by other components. At this time, the annular grinding mechanism 4 can fully grind the edge of the crossbeam drawing part.

[0040] Reference Figure 2 , Figure 3 and Figure 4 In this embodiment, the pressing tube 5 serves as an auxiliary fixing module and plays a crucial role in the grinding process. When the upper mold 2 rises, the pressing tube 5 descends under the drive of the second reciprocating lifting component 51, stably pressing the workpiece edge against the lower mold 1. This action leaves the edge area to be ground suspended, providing unobstructed operating space for the annular grinding mechanism 4 and ensuring that the grinding stone strip 423 can fully contact the upper and lower, inner and outer sides of the workpiece edge, which is a necessary condition for achieving high-quality grinding.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The vacuum cleaner 6 is located on the operating table 10 below the lower mold 1. The vacuum cleaner 6's suction port is connected to the first annular groove 12 through the suction pipe, and is used to suck away the waste generated by grinding in the first annular groove 12.

[0042] Reference Figure 2 , Figure 3 and Figure 4 In this embodiment, the suction port is connected to the first annular groove 12 via a suction pipe, which can promptly remove metal shavings and dust generated during the cutting and grinding process. This not only keeps the mold cavity clean and prevents waste from affecting processing accuracy or damaging the mold surface, but also improves the working environment, meeting the environmental protection and safety requirements of modern production.

[0043] Reference Figure 2 , Figure 3 and Figure 4In summary, this application's embodiments, through innovative integrated structural design, highly integrate the three core processes of drawing, stamping trimming, and burr grinding into a single mold and station. This solves the core problems of complex processes, repeated loading and unloading, equipment changes, and low production efficiency inherent in traditional multi-station production processes. By integrating an adaptively adjustable annular grinding mechanism 4 onto the annular cutter 3, along with the edge-pressing tube 5 and a dust collector 6, efficient and thorough grinding of the workpiece edge is achieved immediately after trimming, while automatically collecting waste chips. This not only significantly improves production efficiency and reduces equipment investment and operational complexity, but also effectively improves grinding consistency and processing accuracy through a double-protected elastic pressing grinding mechanism using the elastic force of the first spring 424, the elastic force of the second spring 425, and the electromagnetic repulsion of the electromagnet 426, ensuring the forming quality and efficiency of the beam-drawn parts' edges.

[0044] The implementation principle of the drawing die for the lower crossbeam of a new energy vehicle in this application embodiment is as follows: First, the upper mold 2 moves downwards, closing with the lower mold 1 fixed on the operating table 10 to form the workpiece. Second, the flat metal sheet placed between the upper and lower molds 1 is pressed into the desired three-dimensional shape of the beam drawing part by the combined action of the upper forming cavity 21 and the lower forming cavity 11 after mold closing. During this process, the draw beads 13 effectively control the flow of the sheet metal, preventing wrinkling or tearing and ensuring forming accuracy. Finally, an excess metal edge that needs to be removed remains around the perimeter of the formed beam drawing part.

[0045] After the drawing process is completed, the upper die 2 is lifted upwards, moving a distance away from the lower die 1. At this point, the main body of the formed beam drawing is supported by the lower die 1. Next, as the upper die 2 rises, the blank holder 5, installed in the third annular groove 23 of the upper die 2, moves downwards independently under the drive of the second reciprocating lifting component 51 connected to it. Finally, the blank holder 5 firmly presses the excess metal edge of the beam drawing onto the lower die 1 table surface inside the first annular groove 12. This operation leaves the edge to be processed suspended in the air, directly below the first annular groove 12, providing unobstructed operating space for subsequent edge trimming and grinding.

[0046] Then, the workpiece edge is trimmed and polished. The annular cutter 3, located in the first annular groove 12, moves steadily upward through multiple sliding links 331 under the drive of the first reciprocating lifting member 33. The blade 32 of the annular cutter 3 rises close to the inner side wall of the second annular groove 22, cutting off the suspended excess metal edge. Next, when the first reciprocating lifting member 33 drives the annular cutter 3 to move up and down, the entire annular polishing mechanism 4, fixed in the annular groove 301 of its blade body 31, moves up and down together. During this process, the grinding stone 423 moves up and down to polish the burrs on the cut edge of the workpiece, and the rounded edges of the grinding stone 423 scrape the upper and lower edges of the cut edge of the workpiece, effectively removing burrs and rounding them. The reciprocating moving device 45 periodically retracts and extends the elastic rope 44 at the end of the steel wire rope 43, thereby reciprocatingly pulling the steel wire rope 43. The steel wire rope 43 passes through the rope hole 3011 on the blade body 31 and connects all the sliders 41. The reciprocating motion of the wire rope 43 drives all the sliders 41 to slide synchronously and in the same direction along the annular groove 301, so that the grinding stones 423 installed on each slider 41 can reciprocate and grind along the entire circumference of the workpiece edge. The connection method of the elastic rope 44 can buffer the impact of the movement, making the operation more stable. At the same time, when the reciprocating moving device 45 malfunctions or fails to accurately coordinate with the lifting and lowering of the annular cutter 3, the elastic rope 44 can adaptively extend and retract to coordinate with the lifting and lowering of the annular cutter 3, so that the wire rope 43 and the annular cutter 3 are less likely to have motion interference. Among them, the grinding stone assembly 42 provides the base elasticity through the rubber strip 420, and the first spring 424 and the second spring 425 respectively provide the initial clamping force, so that the grinding stone 423 can adaptively conform to the slight irregular shape that may exist on the edge of the workpiece. When the electromagnet 426 at the bottom of the receiving groove 4101 is energized, it generates a repulsive force on the first slide and the second slide, which are also magnetic components. This repulsive force, combined with the spring force, pushes the grinding stone 423 more forcefully against the edge of the workpiece, ensuring grinding power, especially suitable for high-strength materials.

[0047] During the cutting and grinding process, the vacuum cleaner 6 located below the operating table 10 works continuously. Its suction port is connected to the bottom of the first annular groove 12 through the suction pipe, which can promptly and effectively remove metal debris and dust generated during cutting and grinding, keep the mold cavity clean, ensure processing accuracy and equipment life, and maintain a good working environment.

[0048] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drawing die for the lower crossbeam of a new energy vehicle, characterized in that: Including the control panel (10); The lower mold (1) is installed on the operating table (10). The lower mold (1) is provided with a lower forming cavity (11) and a first annular groove (12) from the inside to the outside. The upper mold (2) is mounted on the operating table (10) above the lower mold (1) in a height-adjustable manner. The upper mold (2) is provided with an upper forming cavity (21), a second annular groove (22) and a third annular groove (23) from the inside to the outside. The annular cutter (3) is coaxially and vertically disposed in the first annular groove (12) for removing excess metal edges from the edge of the crossbeam drawing; The annular grinding mechanism (4) is located on the inner wall of the annular cutter (3) and is used to grind burrs off the edge of the crossbeam drawing after cutting. The edge pressing tube (5) is coaxially and vertically arranged in the third annular groove (23) for pressing the edge of the crossbeam drawing part onto the lower mold (1) when grinding burrs; A vacuum cleaner (6) is used to remove grinding debris from the first annular groove (12).

2. The drawing die for a lower crossbeam of a new energy vehicle according to claim 1, characterized in that: The outer ring sidewall of the second annular groove (22) is coplanar with the outer ring sidewall of the first annular groove (12); The outer ring sidewall of the third annular groove (23) is coplanar with the inner ring sidewall of the first annular groove (12); The cutting edge (32) of the annular cutter (3) is coplanar with the inner ring sidewall of the second annular groove (22).

3. The drawing die for a lower crossbeam of a new energy vehicle according to claim 1, characterized in that: The inner wall of the annular cutter (3) is provided with a coaxial annular groove (301); the annular grinding mechanism (4) includes; Multiple grinding stone components (42) are disposed within the annular groove (301) and distributed circumferentially along the annular groove (301), and are slidably connected to the inner wall of the annular cutter (3) through the annular groove (301).

4. The drawing die for a lower crossbeam of a new energy vehicle according to claim 3, characterized in that: The annular grinding mechanism (4) also includes; Multiple sliders (41) are arranged one-to-one with multiple grinding stone components (42), and are all located in the annular groove (301). The side of the slider (41) facing the lower forming cavity (11) is provided with a receiving groove (4101). The grinding stone assembly (42) is disposed in the corresponding receiving groove (4101), and the grinding stone assembly (42) includes; Multiple grinding stone strips (423) are vertically arranged and distributed circumferentially along the annular groove (301), and are movably disposed within the receiving groove (4101).

5. The drawing die for a lower crossbeam of a new energy vehicle according to claim 4, characterized in that: The upper end face and the lower end face of the grinding stone strip (423) are both rounded with the side of the grinding stone strip (423) facing the lower forming cavity (11).

6. The drawing die for a lower crossbeam of a new energy vehicle according to claim 5, characterized in that: The grinding stone assembly (42) also includes; A rubber strip (420) is arranged circumferentially in the receiving groove (4101) along the annular groove (301), and the rubber strip (420) is slidably connected to the slider (41); The grinding stone strip (423) is disposed on the side of the rubber strip (420) facing the lower molding cavity (11).

7. The drawing die for a lower crossbeam of a new energy vehicle according to claim 6, characterized in that: The grinding stone assembly (42) also includes; The first slide block is installed in the middle of the rubber strip (420) and is horizontally slidably connected to the slider (41) in the radial direction of the annular groove (301); Two sets of second slide blocks are respectively installed at both ends of the rubber strip (420), and both the upper and lower ends of the second slide blocks are in contact with the slider (41).

8. The drawing die for a lower crossbeam of a new energy vehicle according to claim 7, characterized in that: A first spring (424) is connected between the first slide and the bottom of the receiving groove (4101). A second spring (425) is connected between the second slide and the bottom of the receiving groove (4101).

9. The drawing die for a lower crossbeam of a new energy vehicle according to claim 8, characterized in that: Both the first slide and the second slide are magnetic components; An electromagnet (426) is provided at the bottom of the receiving tank (4101).

10. A drawing die for a lower crossbeam of a new energy vehicle according to claim 9, characterized in that: The annular grinding mechanism (4) also includes; A steel wire rope (43) is connected in sequence to all the sliders (41), and both ends of the steel wire rope (43) are connected to a reciprocating moving device (45) via an elastic rope (44), which is installed on the lower mold (1).

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