A stamping forming die for an automobile fuel tank shell

Abstract

The application relates to the technical field of forming dies, and discloses a stamping forming die for an automobile oil tank shell, which comprises a bottom die plate, a middle die plate, a pressing die plate and a pressing seat, the upper portion of the middle die plate is provided with an upper material positioning mechanism for guiding the calibration position of a metal plate; the lower portion of the upper material positioning mechanism is provided with a die closing mechanism for performing a stamping step; the side surface of the die closing mechanism is provided with a cleaning mechanism for removing interference stamping scraps; the upper surface of each linear motor of the upper material positioning mechanism is fixedly connected with a track, the upper surface of the linear motor is fixedly connected with a bracket plate, the moving die plate is fixedly connected with four groove sliding rods, the four groove sliding rods are in two groups, the outer surfaces of the groove sliding rods in each group are slidably connected with a calibration push block, the positioning precision is improved, and unilateral stress is avoided to cause the plate to be skewed.

Description

Technical Field

[0001] This invention relates to the field of molding die technology, specifically to a stamping die for an automotive fuel tank shell. Background Technology

[0002] In the automotive parts manufacturing industry, fuel tank shell stamping dies are key process equipment for ensuring product sealing and structural strength. Traditional fuel tank shell stamping processes often face problems such as material positioning deviations, uneven die closing clearances, and particulate contamination on the die surface. These defects can easily lead to quality problems such as wrinkling, cracking, or local thinning after the shell is formed. At the same time, excessive pressure during the stamping process may also damage the die or reduce the dimensional accuracy of the product. Therefore, developing a composite functional stamping die that can achieve automatic centering, graded die closing, die surface cleaning, and overload protection is of great significance for improving the forming quality and production stability of fuel tank shells.

[0003] Patent CN223946602U discloses a stamping die for a gasoline generator fuel tank shell, including a die body, a base, support columns, a hydraulic cylinder, an anti-error structure, and a waste collection structure. Several support columns are fixedly connected to the four corners of the base's bottom. A lower die is mounted on the upper end of the base, with a discharge port in the center of the lower die's interior. Positioning pins are provided on the upper surface of the lower die. A heat-conducting plate is located between the lower die and the base, with a cooling fin at the bottom of the heat-conducting plate. An upper die is located above the base, and a cooling structure is provided at the rear end of the lower die. The anti-error structure is located inside the lower die, and the waste collection structure is located at the bottom of the base. This structure solves the problems of cumbersome replacement of easily damaged parts, difficult waste removal, and low cooling efficiency in existing stamping dies, improving production efficiency, reducing scrap rates, and improving the working environment. However, this patent suffers from low positioning accuracy and sheet metal skewing due to unilateral force application. Therefore, a stamping die for an automotive fuel tank shell is proposed to address these problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a stamping die for automobile fuel tank shell, which addresses the shortcomings of the prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a stamping die for an automobile fuel tank shell, including a bottom die, a middle die, a pressure die, and a pressure seat, wherein a feeding and positioning mechanism for guiding the metal plate to be aligned is provided above the middle die; Below the feeding and positioning mechanism is a mold closing mechanism for merging the molds to perform the stamping step; The mold closing mechanism is provided with a cleaning mechanism on its side for removing debris that interferes with stamping. The feeding and positioning mechanism includes two linear motors. Each linear motor has a track installed on its inner side. A moving template is fixedly connected to the upper surface of the track. A bracket plate is fixedly connected to the upper surface of the linear motor. Four grooved sliding rods are fixedly connected to the moving template. The four grooved sliding rods are arranged in pairs, and a positioning push block is slidably connected to the outer surface of each pair of grooved sliding rods. A push plate is fixedly connected to the side of each positioning push block. A baffle plate is slidably connected to the side of the push plate. A push block guide rod is fixedly connected to the side of each positioning push block. A push plate guide rod is fixedly connected to the side edge of the baffle plate. The surface of the bracket plate is respectively provided with baffle rail grooves and push block rail grooves.

[0006] According to the above technical solution, the feeding and positioning mechanism also includes two side-parting molds. The top surface of each side-parting mold is fixedly connected to a hinge. The end of the hinge away from the side-parting mold is fixedly connected to the moving template. The side pivot of the hinge is fixedly connected to a hinge shaft. The end of the hinge shaft is fixedly connected to a flipping wheel block. The upper and lower sides of the bracket plate are provided with slots.

[0007] According to the above technical solution, the bottom surface of the bracket plate is provided with a support block, and the support block is fixedly connected to the middle template. The baffle rail groove is slidably connected to the push plate guide rod, the push block rail groove is slidably connected to the push block guide rod, and the hinge shaft rod is rotatably connected to the moving template.

[0008] According to the above technical solution, the side cross-section of the bracket plate is L-shaped, and the side of the bracket plate is provided with a long groove for the sliding of the flipping wheel block. The side splitting mold located on the front side is set upward by the flipping wheel block connected to the hinge rod, and the side splitting mold located on the rear side is set downward by the flipping wheel block connected to the hinge rod.

[0009] According to the above technical solution, the mold closing mechanism includes two short guide rods, each of which has two thin sliding rods on its side, and a long sliding rod slidably connected above each thin sliding rod. Multiple support columns are fixedly connected to the upper surface of the bottom template, and a column base plate is fixedly connected to the top of each support column. A lower closing mold is fixedly connected to the upper surface of the column base plate. An inner through groove is opened on the upper surface of the middle template, and a lower pressing mold is fixedly connected to the bottom surface of the pressing template.

[0010] According to the above technical solution, the thin sliding rod is fixedly connected to the top surface of the bottom template, the short guide rod is fixedly connected to the bottom template, and the long sliding rod is fixedly connected to the middle template.

[0011] According to the above technical solution, the cleaning mechanism includes a sliding guide rod, the top end of which is slidably connected to a limiting cylinder, and the top side of the limiting cylinder is fixedly connected to an air guide pipe. The interior of the middle template is provided with an inner cavity, and the side wall of the inner through groove is provided with an air jet groove.

[0012] According to the above technical solution, the limiting cylinder is fixedly connected to the middle template, the air jet groove is connected to the inner cavity, and the end of the air guide pipe away from the limiting cylinder is connected to the inner cavity.

[0013] The present invention, by adopting the above technical solution, can bring the following beneficial effects: This automotive fuel tank shell stamping die uses a positioning pusher block that slides along a grooved slide bar and approaches the metal plate edge above the barrier plate. This ensures the positioning pusher block moves smoothly and accurately. The positioning pushers on both sides approach each other and contact the four corners of the metal plate edge through connected push plates. This allows the metal plate to move to the accurate position under the clamping of the push plates. The position of the metal plate is simultaneously corrected from the four corners, improving positioning accuracy and avoiding skewing of the plate due to unilateral force. The hinge shaft rod causes the hinge to flip from a bent right angle state to a flat state. The moving template itself drives the die to close, eliminating the need for additional cylinders or motors. The structure is compact and the operation is reliable. The hinge flipping also drives the side parting molds to close. The two side parting molds that close the mold support the metal plate falling from the barrier plate from the top. The metal plate is supported from the bottom by the closed mold at the moment of falling, preventing the metal plate from falling freely and causing displacement or collision. The stamping die for the car fuel tank shell moves to the empty slot position via a flipping wheel block connected to the hinge rod. At this point, the flipping wheel block is no longer blocked by the bracket plate, and the side parting die flips downward under the action of gravity, allowing the formed die to be demolded and fall through the transfer template for material ejection. This gravity flipping demolding method does not require an additional ejection mechanism and relies on its own weight to complete automatic material ejection, simplifying the structure and reducing the failure rate.

[0014] The stamping die for the automotive fuel tank shell is in a pre-tensioned state via a long sliding rod and a short guide rod connected to the pressure platen and the bottom platen. This pre-tension provides initial guiding tension for subsequent mold closing, ensuring that each platen maintains coaxiality during sliding. At the same time, the stamping force automatically eliminates the parting surface gap of the side parting die, preventing flash from forming. The pressure platen then slides along the long sliding rod to drive the lower pressing die to stamp the metal sheet. Through a step-by-step mold closing sequence, the lower closing die first closes and locks with the side parting die, and then the upper lower pressing die performs the stamping. This ensures that the metal sheet is formed in a completely closed cavity, reducing the risk of displacement and cracking.

[0015] This automotive fuel tank shell stamping die can blow clean the die surface before each die closing to prevent particles from pressing into the metal sheet surface and causing indentations or scratches, thus affecting the stamping quality. At the same time, the limiting cylinder, as a limiter for the pressing die, together with the short guide rod, prevents excessive pressure. This double limiting structure can prevent excessive stamping pressure from damaging the die or causing the metal sheet to become too thin, thus improving the safety and stability of the stamping process. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall frontal three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall rear-view three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the feeding and positioning mechanism of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram of A in the middle; Figure 5 This is a schematic diagram of the hinge shaft connection structure of the present invention; Figure 6 This is a schematic diagram of the mold closing mechanism of the present invention; Figure 7 This is a schematic diagram of the cleaning mechanism of the present invention.

[0017] In the diagram: 1. Bottom template; 2. Middle template; 3. Pressing template; 4. Pressing seat; 5. Feeding and positioning mechanism; 501. Linear motor; 502. Track; 503. Bracket plate; 504. Moving template; 505. Groove slide bar; 506. Positioning push block; 507. Push plate; 508. Barrier plate; 509. Push block guide rod; 510. Push plate guide rod; 511. Barrier plate rail groove; 512. Push block rail groove; 513. Side splitting mold; 514. 515. Hinge; 516. Flipping wheel block; 517. Hollow slot; 6. Mold closing mechanism; 601. Short guide post; 602. Thin slide rod; 603. Long slide rod; 604. Column plate; 605. Support column; 606. Lower closing mold; 607. Inner through slot; 608. Lower pressing mold; 7. Cleaning mechanism; 701. Sliding plug guide rod; 702. Limiting cylinder; 703. Air guide pipe; 704. Inner cavity; 705. Air jet groove. Detailed Implementation

[0018] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-7 One embodiment of the present invention is: a stamping die for an automobile fuel tank shell, including a bottom template 1, a middle template 2, a pressure template 3, and a pressure seat 4. A feeding and positioning mechanism 5 for guiding the metal plate to be aligned is provided above the middle template 2. Below the feeding and positioning mechanism 5 is a mold closing mechanism 6 for merging the molds to perform the stamping step; The mold closing mechanism 6 is provided with a cleaning mechanism 7 on its side for removing interfering stamping debris; The feeding and positioning mechanism 5 includes two linear motors 501. Each linear motor 501 has a track 502 installed on its inner side. A moving template 504 is fixedly connected to the upper surface of the track 502. A bracket plate 503 is fixedly connected to the upper surface of the linear motor 501. Four grooved slide rods 505 are fixedly connected to the moving template 504. The four grooved slide rods 505 are in pairs. A positioning push block 506 is slidably connected to the outer surface of each pair of grooved slide rods 505. A push plate 507 is fixedly connected to the side of each positioning push block 506. A baffle plate 508 is slidably connected to the side of the push plate 507. A push block guide rod 509 is fixedly connected to the side of each positioning push block 506. A push plate guide rod 510 is fixedly connected to the side edge of the baffle plate 508. A baffle plate groove 511 and a push block groove 512 are respectively opened on the surface of the bracket plate 503.

[0020] The feeding and positioning mechanism 5 also includes two side-parting molds 513. Each side-parting mold 513 has a hinge 514 fixedly connected to its top surface. The end of the hinge 514 away from the side-parting mold 513 is fixedly connected to the moving template 504. The side pivot of the hinge 514 is fixedly connected to a hinge rod 515. The end of the hinge rod 515 is fixedly connected to a flipping wheel block 516. The upper and lower sides of the bracket plate 503 are provided with slots 517.

[0021] The bottom surface of the bracket plate 503 is provided with a support block, and the support block is fixedly connected to the middle template 2. The baffle rail groove 511 is slidably connected to the push plate guide rod 510, the push block rail groove 512 is slidably connected to the push block guide rod 509, and the hinge shaft rod 515 is rotatably connected to the moving template 504.

[0022] The bracket plate 503 has an L-shaped side cross-section. A long groove is provided on the side of the bracket plate 503 for the sliding of the flipping wheel block 516. The front side-parting mold 513 is positioned upwards via the flipping wheel block 516 connected to the hinge shaft rod 515, while the rear side-parting mold 513 is positioned downwards via the flipping wheel block 516 connected to the hinge shaft rod 515. After the metal plate is moved above the transfer template 504, it is held in place by the blocking plate 508. Subsequently, the linear motor 501 drives the track 502 to move. The transfer template 504 connected to the track 502 moves with the track 502, and also moves the upper connected alignment push block 506. During the movement of the alignment push block 506, it moves along the push block guide rod 509 along the push block rail groove 512 on the bracket plate 503. The alignment push block 506 slides along the groove slide rod 505 and moves closer to the edge of the metal plate above the barrier plate 508. Then, the alignment push blocks 506 on both sides move closer to each other and contact the four corners of the edge of the metal plate through the connected push plate 507, so that the metal plate moves to the accurate position under the clamping of the push plate 507. At the same time, the barrier plate 508 slides along the barrier plate rail groove 511 through the connected push plate guide rod 510. After the barrier plate 508 and the alignment push block 506 slide relative to each other, they move away from the metal plate. In addition, the movement of the moving template 504 drives the movement of the two side split molds 513 connected by the hinge 514. The hinge 514 connected to the side split molds 513 is connected to the flipping wheel block 516 through the hinge shaft rod 515. The flipping wheel block 516 moves from the empty space on the bracket plate 503. As the slot 517 moves with the moving template 504, the flipping wheel block 516 is guided to rotate by the bracket plate 503, and the hinge 514 is flipped from a bent right angle state to a flat state through the hinge shaft rod 515. The flipping of the hinge 514 drives the side parting mold 513 to close. The two side parting molds 513 that are closed support the metal sheet falling from the barrier plate 508 from the top surface. At this time, the closed side parting molds 513 move with the moving template 504 to the bottom of the pressure plate 3 to prepare for stamping the metal sheet. After the stamping is completed, the linear motor 501 drives the track 502 to move the moving template 504 from the bottom of the pressure plate 3 to the initial position. When the hinge 514 of the side parting mold 513 moves to the empty slot 517 through the flipping wheel block 516 connected to the hinge shaft rod 515, After positioning, the flipping wheel block 516 is no longer blocked by the bracket plate 503. The side-parting mold 513 flips downward under gravity, allowing the formed mold to be demolded and fall through the transfer plate 504 for material removal. The positioning push block 506 slides along the groove slide rod 505 and moves towards the edge of the metal plate above the barrier plate 508, ensuring that the positioning push block 506 moves smoothly and accurately. The positioning push blocks 506 on both sides move closer to each other and contact the four corners of the metal plate edge through the connected push plate 507, so that the metal plate moves to the accurate position under the clamping of the push plate 507. The position of the metal plate is simultaneously corrected from the four corners, improving the positioning accuracy and avoiding the skewing of the plate due to unilateral force. The hinge rod 515 causes the hinge 514 to flip from a bent right angle state to a flat state.The mold closing mechanism utilizes the self-moving power of the transfer template 504, eliminating the need for additional cylinders or motors. This results in a compact structure and reliable operation. The hinge 514 flips, causing the side-parting molds 513 to close. The two side-parting molds 513, now closed, support the falling metal sheet from the top surface of the barrier plate 508. The metal sheet is supported from the bottom by the closed molds during its fall, preventing it from shifting or colliding during free fall. Furthermore, after the flipping wheel block 516, connected to the hinge shaft 515, moves to the empty slot 517, it is no longer obstructed by the bracket plate 503. The side-parting molds 513 then flip downwards under gravity, allowing the formed mold to demold and fall through the transfer template 504 for material removal. This gravity-driven demolding method eliminates the need for an additional ejection mechanism, relying on its own weight for automatic material removal, simplifying the structure and reducing the failure rate.

[0023] The mold closing mechanism 6 includes two short guide rods 601, each short guide rod 601 has two thin sliding rods 602 on its side, and each thin sliding rod 602 is slidably connected to a long sliding rod 603 above it. Multiple support columns 605 are fixedly connected to the upper surface of the bottom mold plate 1, and a column base plate 604 is fixedly connected to the top of the support columns 605. A lower closing mold 606 is fixedly connected to the upper surface of the column base plate 604. An inner through groove 607 is opened on the upper surface of the middle mold plate 2, and a lower pressing mold 608 is fixedly connected to the bottom surface of the pressing mold plate 3.

[0024] The thin sliding rod 602 is fixedly connected to the top surface of the bottom template 1, the short guide rod 601 is fixedly connected to the bottom template 1, and the long sliding rod 603 is fixedly connected to the middle template 2. The worktable of the stamping frame is fixed to the bottom template 1. One end of the punch of the stamping frame is connected to the pressure seat 4 on the pressure plate 3. Before the stamping die is made, the punch of the stamping frame is away from the worktable. At this time, the middle template 2 is in a pulled state through the long sliding rod 603 and the short guide rod 601 connected to the pressure plate 3 and the bottom template 1, respectively. When the moving template 504 drives the side parting die 513... When the metal sheet is transferred to the underside of the lower die 608, the punch of the stamping frame pushes the pressure plate 3, which slides along the long slide rod 603. At the same time, the bottom die 1 pushes the connected short guide rod 601 and thin slide rod 602 upwards relative to the middle die 2. The thin slide rod 602 slides on the inner wall of the long slide rod 603. As the bottom die 1 and the middle die 2 approach each other, the bottom die 1 drives the connected support column 605 and column base plate 604 to make the lower die 606 pass through the inner through groove 607 of the middle die 2. The lower mold 606 closes near the bottom of the side mold 513 and contacts its bottom surface. The lower mold 606 presses against the side mold 513 through the contact surface, and the side mold 513, in turn, is closed by the reaction force from the edge of the moving mold plate 504. Subsequently, the pressure mold 3 slides along the long slide rod 603, driving the lower pressure mold 608 to stamp the metal plate. The long slide rod 603 and the short guide rod 601, connected to the pressure mold 3 and the bottom mold plate 1, are in a stretched state. This pre-stretched state provides initial guidance for subsequent mold closing. Tension ensures that each template maintains coaxiality during sliding. At the same time, the punching force automatically eliminates the gap on the parting surface of the side parting mold 513, avoiding flash during forming. The pressure plate 3 then slides along the long slide rod 603 to drive the lower pressure mold 608 to punch the metal plate. Through the step-by-step mold closing sequence, the lower closing mold 606 first closes and locks with the side parting mold 513, and then the upper lower pressure mold 608 punches, which can ensure that the metal plate is formed in a completely closed cavity, reducing the risk of displacement and cracking.

[0025] The cleaning mechanism 7 includes a sliding guide rod 701, the top of which is slidably connected to a limiting cylinder 702, and the top side of the limiting cylinder 702 is fixedly connected to an air guide pipe 703. The interior of the middle template 2 is provided with an inner cavity 704, and the side wall of the inner through groove 607 is provided with an air jet groove 705.

[0026] The limiting cylinder 702 is fixedly connected to the middle template 2, the air jet 705 is connected to the inner cavity 704, and the end of the air guide pipe 703 away from the limiting cylinder 702 is connected to the inner cavity 704. When the side parting mold 513 and the lower closing mold 606 are closed, the middle template 2 and the pressure plate 3 move closer to each other, causing the air in the limiting cylinder 702 to be squeezed by the sliding guide rod 701. The air in the limiting cylinder 702 is discharged into the inner cavity 704 through the air guide pipe 703, and the air jet 705 connected in the inner cavity 704 sprays air onto the rising lower closing mold 606 to remove the debris generated by the stamping. Dust particles can be blown away to avoid affecting the stamping of the metal sheet. At the same time, the limiting cylinder 702, as a limiter for the pressing platen 3, together with the short guide rod 601, prevents excessive pressure. The mold surface can be blown away before each mold closing to prevent particles from being pressed into the surface of the metal sheet, causing indentations or scratches, which would affect the stamping quality. The limiting cylinder 702, as a limiter for the pressing platen 3, together with the short guide rod 601, prevents excessive pressure. This double limiting structure can prevent excessive stamping pressure from damaging the mold or causing the metal sheet to become too thin, thus improving the safety and stability of the stamping process.

[0027] Working principle: After the metal plate is moved above the moving template 504, it is held in place by the barrier plate 508. Subsequently, the linear motor 501 drives the track 502 to move. The moving template 504 connected to the track 502 moves with the track 502, and also drives the upper connected positioning push block 506 to move together. During the movement of the positioning push block 506, it slides along the push block groove 512 on the bracket plate 503 through the connected push block guide rod 509. The positioning push block 506 slides along the groove slide rod 505 and moves towards the metal plate above the barrier plate 508. As the plate edges approach each other, the alignment push blocks 506 on both sides move closer together and contact the four corners of the metal plate edge via the connected push plate 507, causing the metal plate to move to the accurate position under the clamping of the push plate 507. Simultaneously, the barrier plate 508 slides along the barrier plate rail groove 511 via the connected push plate guide rod 510. After sliding relative to the alignment push blocks 506, the barrier plate 508 moves away from the metal plate. Furthermore, the movement of the template 504 drives the movement of the two side-parting molds 513 connected by hinges 514. The hinges 514 connected to the side-parting molds 513... 4. The hinge rod 515 is connected to the flipping wheel block 516. As the flipping wheel block 516 moves with the moving template 504 from the slot 517 on the bracket plate 503, it is guided to rotate by the bracket plate 503. The hinge rod 515 causes the hinge 514 to flip from a bent right angle state to a flat state. The flipping of the hinge 514 drives the side parting mold 513 to close. The two side parting molds 513 that are closed then support the metal sheet falling from the barrier plate 508 from the top surface. At this time, the closed side parting molds 513 move with the moving template 504. Move to the bottom of the pressing plate 3 to prepare for stamping the metal plate. After the stamping is completed, the linear motor 501 drives the track 502 to move the moving plate 504 from the bottom of the pressing plate 3 to the initial position. When the hinge 514 of the side parting mold 513 moves to the empty slot 517 position through the flipping wheel block 516 connected to the hinge shaft rod 515, the flipping wheel block 516 is no longer blocked by the bracket plate 503. The side parting mold 513 flips down under the action of gravity, and the formed mold is demolded and falls through the moving plate 504 to be ejected. The worktable of the stamping frame is fixed to the bottom template 1. One end of the punch of the stamping frame is connected to the pressure seat 4 on the pressure plate 3. Before pressing, the punch of the stamping frame is away from the worktable. At this time, the middle template 2 is in a pulled state through the long slide rod 603 and the short guide rod 601 connected to the pressure plate 3 and the bottom template 1, respectively. When the moving template 504 drives the side parting mold 513 to transfer the metal plate to directly below the lower pressing mold 608, the punch of the stamping frame pushes the pressure plate 3. The pressure plate 3 slides along the long slide rod 603. At the same time, the bottom template 1 pushes the connected short guide rod 601 and thin slide rod 602 upward to meet the middle template 2. For sliding, the thin slide bar 602 slides on the inner wall of the long slide bar 603. As the bottom template 1 and the middle template 2 approach each other, the bottom template 1 drives the connected support column 605 and column plate 604 to make the lower closing mold 606 pass through the inner through groove 607 of the middle template 2 and approach the bottom of the side parting mold 513, and contact the bottom surface of the side parting mold 513 to close the mold. The lower closing mold 606 squeezes the side parting mold 513 through the contact surface, and the side parting mold 513 is closed by the reaction force of the moving template 504 edge. Then, the pressing template 3 slides along the long slide bar 603 to drive the lower pressing mold 608 to press the metal plate. When the side parting mold 513 and the lower closing mold 606 are closed, the middle mold plate 2 and the pressure mold plate 3 approach each other, causing the air in the limiting cylinder 702 to be squeezed by the sliding guide rod 701. The air in the limiting cylinder 702 is discharged into the inner cavity 704 through the air guide pipe 703, and blows away the debris or dust particles generated by stamping through the air jet groove 705 connected in the inner cavity 704 to the rising lower closing mold 606, so as to avoid affecting the stamping and forming of the metal sheet. At the same time, the limiting cylinder 702, as a limiter for the pressure mold plate 3 to press down, together with the short guide rod 601, prevents excessive pressure.

[0028] This invention provides a stamping die for an automotive fuel tank casing. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A stamping die for an automobile fuel tank shell, comprising a bottom die (1), a middle die (2), a pressure die (3), and a pressure seat (4), characterized in that: Above the template (2) is a feeding and positioning mechanism (5) for guiding the metal plate to the calibration position. Below the feeding and positioning mechanism (5) is a mold closing mechanism (6) for merging the molds to perform the stamping step. The mold closing mechanism (6) is provided with a cleaning mechanism (7) on its side for removing interfering stamping debris. The feeding and positioning mechanism (5) includes two linear motors (501). Each linear motor (501) has a track (502) installed on its inner side. A moving template (504) is fixedly connected to the upper surface of the track (502). A bracket plate (503) is fixedly connected to the upper surface of the linear motor (501). The moving template (504) is fixedly connected to four grooved slide rods (505). The four grooved slide rods (505) are arranged in pairs, and the outer surface of each pair of grooved slide rods (505) slides... A positioning push block (506) is dynamically connected, and a push plate (507) is fixedly connected to the side of each positioning push block (506). A barrier plate (508) is slidably connected to the side of the push plate (507). A push block guide rod (509) is fixedly connected to the side of each positioning push block (506). A push plate guide rod (510) is fixedly connected to the side edge of the barrier plate (508). A barrier rail groove (511) and a push block rail groove (512) are respectively opened on the surface of the bracket plate (503). The feeding and positioning mechanism (5) also includes two side-parting molds (513). Each side-parting mold (513) has a hinge (514) fixedly connected to its top surface. The end of the hinge (514) away from the side-parting mold (513) is fixedly connected to the moving template (504). The side pivot of the hinge (514) is fixedly connected to a hinge rod (515). The end of the hinge rod (515) is fixedly connected to a flipping wheel block (516). The bracket plate (503) has slots (517) on both the upper and lower sides. The bottom surface of the bracket plate (503) is provided with a support block, and the support block is fixedly connected to the middle template (2). The baffle rail groove (511) is slidably connected to the push plate guide rod (510). The push block rail groove (512) is slidably connected to the push block guide rod (509). The hinge rod (515) is rotatably connected to the moving template (504). The bracket plate (503) has an L-shaped side cross section. The side of the bracket plate (503) is provided with a long groove for the sliding of the flipping wheel block (516). The side-separating mold (513) located on the front side is set upward through the flipping wheel block (516) connected to the hinge rod (515), and the side-separating mold (513) located on the rear side is set downward through the flipping wheel block (516) connected to the hinge rod (515).

2. The stamping die for an automotive fuel tank shell according to claim 1, characterized in that: The mold closing mechanism (6) includes two short guide rods (601), each of which has two thin sliding rods (602) on its side. Each of the thin sliding rods (602) is slidably connected to a long sliding rod (603) above it. The upper surface of the bottom template (1) is fixedly connected to multiple support columns (605). The top of each support column (605) is fixedly connected to a column base plate (604). The upper surface of the column base plate (604) is fixedly connected to a lower closing mold (606). The upper surface of the middle template (2) is provided with an inner through groove (607). The bottom surface of the pressure template (3) is fixedly connected to a lower pressing mold (608).

3. The stamping die for an automotive fuel tank shell according to claim 2, characterized in that: The thin sliding rod (602) is fixedly connected to the top surface of the bottom template (1), the short guide rod (601) is fixedly connected to the bottom template (1), and the long sliding rod (603) is fixedly connected to the middle template (2).

4. The stamping die for an automotive fuel tank shell according to claim 3, characterized in that: The cleaning mechanism (7) includes a sliding guide rod (701), the top end of which is slidably connected to a limiting cylinder (702), and the top side of the limiting cylinder (702) is fixedly connected to an air guide pipe (703). The interior of the middle template (2) is provided with an inner cavity (704), and the side wall of the inner through groove (607) is provided with an air jet groove (705).

5. The stamping die for an automotive fuel tank shell according to claim 4, characterized in that: The limiting cylinder (702) is fixedly connected to the middle template (2), the jet groove (705) is connected to the inner cavity (704), and the end of the air guide pipe (703) away from the limiting cylinder (702) is connected to the inner cavity (704).

Images