Bending and stamping device for buckle in fuel tank chuck

Abstract

The utility model discloses a fuel tank chuck inner buckle bending and stamping device in the field of fuel tank chuck machining, which comprises an upper die holder and a lower die holder which correspond to each other, a stripper plate is arranged between the upper die holder and the lower die holder, and a plurality of nitrogen springs are arranged on the lower side of the upper die holder and correspond to the stripper plate. The lower die base is provided with a lower fixing plate, the lower fixing plate is provided with a plurality of sets of sliding forming lower dies which are arranged at intervals in the circumferential direction and can move in the radial direction, and the lower side of the upper die base is provided with a driving fixing plate. A plurality of sets of upper die assemblies which are arranged at intervals in the circumferential direction are arranged on the driving fixing plate and correspond to the sliding forming lower dies, and a plurality of profiling material pressing components which are arranged at intervals in the circumferential direction are arranged on the discharging plate and correspond to the sliding forming lower dies. According to the utility model, the bending edge punched by the chuck is perfectly separated from the die, and the production capacity is stable.

Description

Technical Field

[0001] This utility model belongs to the field of fuel tank chuck processing, and specifically relates to a buckle bending and stamping device for fuel tank chuck. Background Technology

[0002] Most automotive fuel tanks are made of plastic. To install fuel pumps or other control valves, they need to be reinforced in certain areas. Therefore, a fuel tank chuck insert is used. This insert is made of stamped metal sheet. Its main structure includes a disc-shaped annular body with a central hole punched through it. The outer periphery of the annular body has several circumferentially spaced bent edges.

[0003] Currently, fuel tank chucks are generally manufactured using a punch press equipped with progressive dies. The feeding mechanism drives the material strip to move backward, and the punch press performs multi-station continuous punching on the material strip located between the upper and lower dies, thereby producing the fuel tank chuck.

[0004] When the die of a punch press is used to stamp the bent edge of a chuck, the part is prone to becoming stuck inside the die after the bending process, making it difficult to eject. Existing technologies use a slider structure to eject the part, but this still has the following problems: 1. The slider's dimensions are not stable due to the influence of the die's closing height; 2. When the return spring force of the slider weakens, there is no forced return, posing a risk of die breakage. Utility Model Content

[0005] The purpose of this utility model is to provide a buckle bending stamping device for fuel tank chucks, which can solve the problem that the stamped parts cannot be removed from the mold after bending, perfectly realize the removal of the bent edge stamped out of the mold by the chuck, and have stable production capacity.

[0006] The purpose of this utility model is achieved as follows: A buckle bending and stamping device for a fuel tank chuck includes an upper die base and a lower die base corresponding to each other. A stripper plate is provided between the upper die base and the lower die base. A plurality of nitrogen springs are provided on the lower side of the upper die base corresponding to the stripper plate. The lower end of each nitrogen spring elastically abuts against the upper side of the stripper plate. A lower fixing plate is provided on the lower die base. A plurality of sliding forming lower dies are arranged circumferentially and radially movable along the lower fixing plate. A drive fixing plate is provided on the lower side of the upper die base. A plurality of upper die assemblies are arranged circumferentially and spaced apart corresponding to each sliding forming lower die on the drive fixing plate. A plurality of contouring pressing parts are arranged circumferentially and spaced apart corresponding to each sliding forming lower die on the stripper plate. Each contouring pressing part corresponds to each set of upper die assemblies.

[0007] In this invention, the upper and lower dies serve as a bending and stamping station of a progressive die. The press is equipped with a material floating mechanism corresponding to the progressive die. The feeding mechanism drives the strip to move backward. The chuck workpiece to be bent and stamped is connected to the bending and stamping station of the strip (the chuck workpiece is part of the strip and has not yet undergone the last stamping station of the progressive die, so the chuck workpiece has not yet been separated from the strip). The material floating mechanism can lift the entire strip and the chuck workpiece on the strip. The upper and lower die holders of this invention are installed on the press, and the press slide drives the upper die holder to perform reciprocating up and down movement. The present invention features a stripper plate with several stripper sleeves vertically arranged on it. The upper end of each stripper sleeve passes through the upper die base, and a limiting step is provided on the outer periphery of the extended end of the stripper sleeve. The stripper plate is fixed to several guide pillars, each guide pillar passing through the corresponding stripper plate and perpendicular to it. A guide sleeve is provided on the upper and lower die bases corresponding to the upper and lower ends of each guide pillar, and the two ends of the guide pillar are movably connected to the corresponding upper and lower guide sleeves. When the upper die base is at its highest point, a nitrogen spring presses the stripper plate down to maximize the distance between the stripper plate and the upper die base. During the bending and stamping operation, the conforming pressing component presses down on the annular chuck workpiece, drives the reset upper die to cooperate with the sliding forming lower die, so that the sliding forming lower die positions the lower side of the L-shaped part to be bent on the chuck workpiece, and the upper die bending punch stamps the L-shaped part to be bent into a U-shape. After the stamping is completed, the upper die assembly rises, drives the reset upper die to cooperate with the sliding forming lower die, so that the sliding forming lower die disengages from the U-shaped part to be bent. Compared with the prior art, the beneficial effects of this utility model are: it can solve the problem that the stamped parts cannot be removed from the mold after bending, perfectly realize the removal of the bent edge stamped by the chuck from the mold, and has stable production capacity.

[0008] As a further improvement of this utility model, the unloading plate, the upper mold base and the lower mold base are all horizontally arranged, and the nitrogen spring is vertically arranged.

[0009] As a further improvement of this utility model, each of the sliding forming lower dies is evenly distributed circumferentially, and a sliding guide rail is correspondingly provided on both sides of the circumferential edge of each sliding forming lower die on the lower fixed plate. The sliding forming lower die is movably connected to the two corresponding circumferentially adjacent sliding guide rails, and the sliding forming lower dies and the sliding guide rails are arranged alternately along the circumferential direction. The sliding guide rails guide the radial movement of the sliding forming lower die.

[0010] As a further improvement of this utility model, a radial groove is formed on the lower fixed plate for each sliding forming lower die. A travel limit pin is vertically fixed on the sliding forming lower die, extending downward into the corresponding groove. The travel limit pin fits against the inner wall of the inner end of the groove. A reset drive spring is radially provided between the travel limit pin and the inner wall of the outer end of the corresponding groove. A lower template is fixed on the upper side of the lower fixed plate. After the sliding forming lower die moves radially outward, the reset drive spring can reset the sliding forming lower die. A mounting groove for installing each sliding forming lower die is opened in the middle of the lower template. A gap is left between the inner wall of the mounting groove and the outer periphery of the sliding forming lower die to prevent interference when the upper die bending punch bends the part to be bent.

[0011] As a further improvement of this utility model, an annular chuck workpiece to be bent and stamped is provided between the upper die assembly, the contouring pressing component, and the lower sliding forming die. The outer periphery of the chuck workpiece has several L-shaped bending portions evenly distributed circumferentially. An arc-shaped transition portion is provided between the bending portions and the chuck workpiece. An annular clearance groove is provided at the bottom of the unloading plate corresponding to the chuck workpiece. Several embedding grooves are provided on the unloading plate corresponding to each contouring pressing component. Each embedding groove is located above the clearance groove, and each contouring pressing component is fitted into its corresponding embedding groove. The lower part of the conforming pressing component has a pressing groove. The inner wall of the pressing groove is provided with a horizontal pressing surface one and an arc-shaped pressing surface two. After the chuck workpiece enters the clearance groove, the pressing surface one and the pressing surface two respectively press the upper end and the outer periphery of the annular chuck workpiece, and the horizontal section of the L-shaped part to be bent is in contact with the lower surface of the unloading plate. The upper die assembly includes a drive-reset upper die and an upper die bending punch. The drive-reset upper die and the upper die bending punch are located radially inside and outside the corresponding conforming pressing component, respectively. The unloading plate has several through holes corresponding to each drive-reset upper die and upper die bending punch. When the chuck workpiece enters the clearance groove, the pressing surface one and the pressing surface two of the conforming pressing component press the upper end and the outer periphery of the annular chuck workpiece, respectively. The drive-reset upper die and the upper die bending punch can move downward through the unloading plate.

[0012] As a further improvement of this utility model, both the drive reset upper die and the upper die bending punch are vertically arranged. The cross-section of the drive reset upper die is rectangular. A functional groove is provided on the lower outer side of the drive reset upper die, and a forced reset part is provided on the lower inner side of the drive reset upper die. The height of the functional groove is greater than the height of the forced reset part. The inner wall of the functional groove of the drive reset upper die is provided with a vertical first extrusion surface and an inclined second extrusion surface. An arc-shaped connecting surface is provided between the first extrusion surface and the bottom surface of the drive reset upper die. An arc-shaped connecting surface is provided between the first extrusion surface and the second extrusion surface. An arc-shaped connecting surface is provided between the second extrusion surface and the outer side surface of the drive reset upper die. The bottom surface of the forced reset part is flush with the bottom surface of the drive reset upper die. An inclined reset extrusion surface is also provided on the forced reset part. An arc-shaped connecting surface is provided between the reset extrusion surface of the forced reset part and the bottom surface. An arc-shaped connecting surface is provided between the reset extrusion surface and the inner side surface of the drive reset upper die. By driving the upper die to insert into the stroke groove and cooperate with the lower die to slide, the lower die is driven to move outward to compress the reset drive spring, and the lower die can be forced to reset. The arc-shaped connecting surface of the upper die is in contact with the inner wall of the stroke groove of the lower die. The arc-shaped flexible contact drive is smoother and avoids direct hard contact collisions.

[0013] As a further improvement of this utility model, the sliding forming lower die is provided with a stroke groove through the drive reset upper die. The stroke groove includes a main groove and an upper clearance groove and a lower reset groove located inside the main groove. The inner wall of the stroke groove is provided with an inner limiting surface vertically. The outer wall of the stroke groove is provided with an inclined upper pushing surface located above and a vertical lower pushing surface located below. The upper pushing surface and the lower pushing surface are provided with corresponding functional grooves. The lower reset groove is provided with a forced reset part. The distance between the inner and outer sides of the drive reset upper die is provided with a distance between the inner limiting surface and the lower pushing surface of the stroke groove. The outer side of the sliding forming lower die is provided with a bending groove that can accommodate the bending part. An arc-shaped connecting surface is provided between the inner wall of the upper clearance groove and the inner limiting surface, and an arc-shaped connecting surface is provided between the inner limiting surface and the inner wall of the lower reset groove. An arc-shaped connecting surface is provided between the upper pushing surface and the lower pushing surface. When the upper mold base moves downward, the first extrusion surface and the second extrusion surface of the driving reset upper mold contact the inner wall of the stroke groove of the sliding forming lower mold. When the upper mold base moves upward, the forced reset part of the driving reset upper mold contacts the lower reset groove of the stroke groove of the sliding forming lower mold.

[0014] As a further improvement of this utility model, the lower template is provided with a mounting groove for mounting each sliding forming lower die. When the unloading plate moves downward until each conforming pressing component presses the upper end face and outer periphery of the annular chuck workpiece, each part to be bent is located between the sliding forming lower die and the inner wall of the mounting groove. When the drive reset upper die moves downward until its outer side contacts the lower push surface of the stroke groove of the sliding forming lower die, the sliding forming lower die moves outward to the lower side of the corresponding part to be bent. The horizontal section of the part to be bent is located between the conforming pressing component and the sliding forming lower die. The upper die bending punch presses the part to be bent. When the upper die bending punch moves downward until the upper die reaches the lower dead point, the upper die bending punch bends the L-shaped part to be bent into a U-shape, and the sliding forming lower die is embedded in the U-shaped part to be bent.

[0015] As a further improvement of this utility model, when the driving reset upper mold moves upward until the forced reset part reaches between the inner limiting surface and the lower pushing surface of the sliding forming lower mold, the sliding forming lower mold separates from the U-shaped part to be bent. Attached Figure Description

[0016] Figure 1 This is a top view of each sliding forming lower die on the lower die base of this utility model.

[0017] Figure 2 This is a top view of each sliding forming lower die.

[0018] Figure 3 This is a schematic diagram of the workpiece on the chuck of the strip before bending.

[0019] Figure 4 for Figure 3 BB-direction sectional view.

[0020] Figure 5 This is a schematic diagram showing the structure in which the workpiece on the chuck of the strip floats up after bending.

[0021] Figure 6 for Figure 5 CC-direction sectional view.

[0022] Figure 7 for Figure 2 A sectional view along line AA (the upper mold base is at its highest point).

[0023] Figure 8 This is a top view of the sliding forming lower die and two adjacent sliding guide rails.

[0024] Figure 9 This is a vertical sectional view of the sliding forming lower die and two adjacent sliding guide rails.

[0025] Figure 10 for Figure 7 A magnified view of a portion of the image.

[0026] Figure 11This is a schematic diagram of the structure when the unloading plate begins to press the material.

[0027] Figure 12 A schematic diagram of the structure for driving the upper mold to contact and slide the lower mold during forming.

[0028] Figure 13 This is a schematic diagram of the structure when the unloading plate is pressed into place.

[0029] Figure 14 A schematic diagram of the structure for driving the upper mold to push the sliding forming lower mold outward.

[0030] Figure 15 This is a schematic diagram of the structure when the lower die of the sliding forming process moves radially outward into place.

[0031] Figure 16 This is a schematic diagram of the structure in the closed mold state.

[0032] Figure 17 A schematic diagram of the structure in which the forced reset part of the upper mold moves upward and contacts the inner wall of the lower reset groove of the sliding forming lower mold during the return stroke.

[0033] Figure 18 This is a schematic diagram of the structure when the lower die of sliding forming is reset by the drive to the upper die.

[0034] Figure 19 This is a schematic diagram of the mold opening state where the upper mold base returns to its highest point during the return stroke.

[0035] The components include: 1. Upper die base; 2. Lower die base; 3. Unloading plate; 4. Nitrogen spring; 5. Lower fixing plate; 6. Sliding forming lower die; 601. Stroke limit pin; 6a. Inner limit surface; 6b. Upper pushing surface; 6c. Lower pushing surface; 7. Drive fixing plate; 8. Contouring pressing component; 8a. Pressing surface one; 8b. Pressing surface two; 9. Sliding guide rail; 10. Slide groove; 11. Reset drive spring; 12. Lower template; 12a. Mounting groove; 13. Chuck workpiece; 13a. Bending part; 13a1. Transition part; 14. Clearance groove; 15. Drive reset upper die; 15a. Forced reset part; 15a1. Reset extrusion surface; 15b. First extrusion surface; 15c. Second extrusion surface; 16. Upper die bending punch; 17. Functional groove; 18. Main groove; 18a. Upper clearance groove; 18b. Lower reset groove; 19. Bending groove; 20. Material strip. Detailed Implementation

[0036] like Figure 1-19As shown, a fuel tank chuck buckle bending and stamping device includes an upper die base 1 and a lower die base 2 corresponding to each other. A stripper plate 3 is provided between the upper die base 1 and the lower die base 2. Several nitrogen springs 4 are provided on the lower side of the upper die base 1 corresponding to the stripper plate 3. The stripper plate 3, the upper die base 1 and the lower die base 2 are all horizontally arranged, and the nitrogen springs 4 are vertically arranged. The lower end of each nitrogen spring 4 elastically abuts against the upper side of the stripper plate 3. A lower fixing plate 5 is provided on the lower die base 2. Several sets of sliding forming lower dies 6 are arranged circumferentially and can move radially on the lower fixing plate 5. A driving fixing plate 7 is provided on the lower side of the upper die base 1. Several sets of upper die assemblies are arranged circumferentially and are arranged corresponding to each sliding forming lower die 6 on the driving fixing plate 7. Several circumferentially spaced contouring pressing parts 8 are arranged on the stripper plate 3 corresponding to each sliding forming lower die 6. Each contouring pressing part 8 is arranged one-to-one with each set of upper die assemblies.

[0037] Each of the sliding forming lower dies 6 is evenly distributed circumferentially. A sliding guide rail 9 is correspondingly provided on both sides of the circumferential edge of each sliding forming lower die 6 on the lower fixed plate 5. Each sliding forming lower die 6 is movably connected to two adjacent circumferential sliding guide rails 9. The sliding forming lower dies 6 and the sliding guide rails 9 are arranged alternately along the circumferential direction. The sliding guide rails 9 guide the radial movement of the sliding forming lower dies 6.

[0038] Each sliding forming lower die 6 has a radially formed groove 10 on the lower fixed plate 5. A stroke limiting pin 601 is vertically fixed on the sliding forming lower die 6, extending downward into the corresponding groove 10. The stroke limiting pin 601 fits against the inner wall of the inner end of the groove 10. A reset drive spring 11 is radially provided between the stroke limiting pin 601 and the inner wall of the outer end of the corresponding groove 10. A lower template 12 is fixed on the upper side of the lower fixed plate 5. After the sliding forming lower die 6 moves radially outward, the reset drive spring 11 can reset the sliding forming lower die 6. The lower template 12 has a mounting groove 12a in the middle for mounting each sliding forming lower die 6. A gap is left between the inner wall of the mounting groove 12a and the outer periphery of the sliding forming lower die 6 to prevent interference when the upper die bending punch 16 bends the bending part 13a.

[0039] Between the upper die assembly, the contouring pressing component 8, and the lower sliding forming die 6, an annular chuck workpiece 13 to be bent and stamped is provided. The outer periphery of the chuck workpiece 13 has several L-shaped bending portions 13a evenly distributed circumferentially. An arc-shaped transition portion 13a1 is provided between the bending portions 13a and the chuck workpiece 13. The bottom of the unloading plate 3 has an annular clearance groove 14 corresponding to the chuck workpiece 13. The unloading plate 3 has several embedding grooves corresponding to each contouring pressing component 8, each embedding groove being located above the clearance groove 14. Each contouring pressing component 8 is fitted into its corresponding embedding groove. The lower part of the contouring pressing component 8 has an opening... The chuck is provided with a pressure groove, and the inner wall of the pressure groove is provided with a horizontal pressing surface 8a and an arc-shaped pressing surface 8b. After the chuck workpiece 13 enters the clearance groove 14, the pressing surface 8a and the pressing surface 8b respectively press the upper end and the outer periphery of the annular chuck workpiece 13, and the horizontal section of the L-shaped bending part 13a is in contact with the lower surface of the unloading plate 3. The upper die assembly includes a drive reset upper die 15 and an upper die bending punch 16. The drive reset upper die 15 and the upper die bending punch 16 are located radially on the inner and outer sides of the corresponding conforming pressing part 8, respectively. The unloading plate 3 is provided with several through holes corresponding to each drive reset upper die 15 and upper die bending punch 16. When the chuck workpiece 13 enters the clearance groove 14, the pressing surface 8a and the pressing surface 8b of the conforming pressing component 8 press the upper end and the outer periphery of the annular chuck workpiece 13 respectively, and drive the reset upper die 15 and the upper die bending punch 16 to move downward through the unloading plate 3.

[0040] Both the drive reset upper die 15 and the upper die bending punch 16 are vertically arranged. The drive reset upper die 15 has a rectangular cross-section. A functional groove 17 is provided on the lower outer side of the drive reset upper die 15, and a forced reset part 15a is provided on the lower inner side of the drive reset upper die 15. The height of the functional groove 17 is greater than the height of the forced reset part. The inner wall of the functional groove 17 of the drive reset upper die 15 has a vertical first extrusion surface 15b and an inclined second extrusion surface 15c. An arc-shaped connecting surface is provided between the first extrusion surface 15b and the bottom surface of the drive reset upper die 15. An arc-shaped connecting surface is provided between the first extrusion surface 15b and the second extrusion surface 15c. An arc-shaped connecting surface is also provided between the second extrusion surface 15c and the outer surface of the drive reset upper die 15. The bottom surface of the forced reset part 15a is flush with the bottom surface of the drive reset upper die 15. A reset extrusion surface 15a1 is also inclinedly provided on the forced reset part 15a. An arc-shaped connecting surface is provided between the reset extrusion surface 15a1 and the bottom surface of the forced reset part 15a. An arc-shaped connecting surface is provided between the reset extrusion surface 15a1 and the inner surface of the drive reset upper die 15. By inserting the drive reset upper die 15 into the stroke groove and cooperating with the sliding forming lower die 6, the sliding forming lower die 6 is driven to move outward to compress the reset drive spring 11, and the sliding forming lower die 6 can be forcibly reset. The arc-shaped connecting surface of the drive reset upper die 15 contacts the inner wall of the stroke groove of the sliding forming lower die 6. The arc-shaped flexible contact drive is smoother and avoids direct hard contact collisions.

[0041] The sliding forming lower die 6 is provided with a stroke groove through the drive reset upper die 15. The stroke groove includes a main groove 18 and an upper clearance groove 18a14 and a lower reset groove 18b located inside the main groove 18. The inner wall of the stroke groove is provided with an inner limiting surface 6a vertically. The outer wall of the stroke groove is provided with an inclined upper pushing surface 6b located above and a vertical lower pushing surface 6c located below. The upper pushing surface 6b and the lower pushing surface 6c are provided with functional grooves 17. The lower reset groove 18b is provided with a forced reset part 15a. The distance between the inner and outer sides of the drive reset upper die 15 corresponds to the distance between the inner limiting surface 6a and the lower pushing surface 6c of the stroke groove. The outer side of the sliding forming lower die 6 is provided with a bending groove 19 that can accommodate the bending part 13a. An arc-shaped connecting surface is provided between the inner wall of the upper clearance groove 18a14 and the inner limiting surface 6a, and an arc-shaped connecting surface is provided between the inner limiting surface 6a and the inner wall of the lower reset groove 18b. An arc-shaped connecting surface is provided between the upper pushing surface 6b and the lower pushing surface 6c. When the upper mold base 1 moves downward, the first extrusion surface 15b and the second extrusion surface 15c of the drive reset upper mold 15 contact the inner wall of the stroke groove of the sliding forming lower mold 6. When the upper mold base 1 moves upward, the forced reset part 15a of the drive reset upper mold 15 contacts the lower reset groove 18b of the stroke groove of the sliding forming lower mold 6.

[0042] The lower template 12 is provided with mounting grooves 12a for mounting each sliding forming lower die 6. When the unloading plate 3 moves downward until each contouring pressing component 8 presses down on the upper end face and outer periphery of the annular chuck workpiece 13, each part to be bent 13a is located between the sliding forming lower die 6 and the inner wall of the mounting groove 12a. When the drive reset upper die 15 moves downward until its outer side contacts the lower push surface 6c of the stroke groove of the sliding forming lower die 6, the sliding forming lower die 6 moves outward to the lower side of the corresponding part to be bent 13a. The horizontal section of the part to be bent 13a is located between the contouring pressing component 8 and the sliding forming lower die 6. The upper die bending punch 16 punches the part to be bent 13a. When the upper die bending punch 16 moves downward until the upper die reaches the lower dead point, the upper die bending punch 16 bends the L-shaped part to be bent 13a into a U-shape, and the sliding forming lower die 6 is embedded in the U-shaped part to be bent 13a. When the drive reset upper mold 15 moves upward until the forced reset part 15a reaches between the inner limiting surface 6a and the lower pushing surface 6c of the sliding forming lower mold 6, the sliding forming lower mold 6 separates from the U-shaped bending part 13a.

[0043] The upper and lower dies of this utility model serve as a bending and stamping station of a progressive die. A floating mechanism is provided on the press corresponding to the progressive die. The feeding mechanism drives the strip 20 to move backward. The chuck workpiece 13 to be bent and stamped is connected to the bending and stamping station of the strip 20 (the chuck workpiece 13 is part of the strip 20 and has not yet undergone the last stamping station of the progressive die, so the chuck workpiece 13 has not yet been separated from the strip 20). The floating mechanism can lift the entire strip 20 and the chuck workpiece 13 on the strip 20. The upper die holder 1 and the lower die holder 2 of this utility model are installed on the press. The press slide drives the upper die holder 1 to perform up-and-down reciprocating lifting and lowering movements. The stripper plate 3 of this utility model is vertically provided with several stripper sleeves. The upper end of each stripper sleeve passes through the upper mold base 1 and the outer periphery of the extended end of the stripper sleeve is provided with a limiting step. The stripper plate 3 is fixed with several guide pillars. Each guide pillar passes through the corresponding stripper plate 3 and is perpendicular to the stripper plate 3. The upper mold base 1 and the lower mold base 2 are respectively provided with a guide sleeve at the upper and lower ends of each guide pillar. The two ends of the guide pillar are movably connected to the corresponding upper and lower guide sleeves. When the upper mold base 1 is at the highest point, the nitrogen spring 4 presses the stripper plate 3 down so that the distance between the stripper plate 3 and the upper mold base 1 is the maximum. During the bending and stamping operation, the conforming pressing component 8 presses down on the annular chuck workpiece 13, drives the reset upper die 15 to cooperate with the sliding forming lower die 6, so that the sliding forming lower die 6 positions the lower side of the L-shaped part to be bent 13a of the chuck workpiece 13, and the upper die bending punch 16 punches the L-shaped part to be bent 13a into a U-shape; after the stamping is completed, the upper die assembly rises, drives the reset upper die 15 to cooperate with the sliding forming lower die 6, so that the sliding forming lower die 6 disengages from the U-shaped part to be bent 13a.

[0044] The upper die holder 1 of this utility model is mounted on the punch press slide, such as Figure 7 When the mold is in the open state, the punch press slide reaches its highest point, the mold is fully open, the upper mold is completely separated from the lower mold, the stripper plate 3 is fully ejected by the nitrogen spring 4, and the sliding forming lower mold 6 is fully reset by the reset drive spring 11. The parts from the previous process are fed into this process through the process strip 20 by the feeding mechanism, and the strip 20 is supported by the floating mechanism of the lower mold; Figure 11 When the stripper plate 3 begins to press the material, the punch press slide moves downward, and the upper die, fixed on the punch press slide, moves downward together. The conformal pressing component 8 on the stripper plate 3 begins to press the material, and the guide pin is inserted into the guide hole on the strip 20 to precisely position the stamping part. The floating mechanism of the lower die contacts the stripper plate 3, and the stripper plate 3 begins to press down, driving the stamping part to move downward. Figure 12 The arc-shaped connecting surface between the first extrusion surface 15b of the upper die 15 and the bottom surface contacts the upper push surface 6b of the lower die 6, causing the press slide to move continuously downwards, driving the lower die 6 to move outwards. The stroke limit pin 601 compresses the reset drive spring 11; Figure 13The press slide continues downwards, the stripper plate 3 reaches its position and remains stationary, the upper die assembly continues to move downwards, and the nitrogen spring 4 is compressed backwards by the stripper plate 3, thus fixing the stamped part completely in the die-casting process; Figure 14 The punch press slide continues to move downwards, the first extrusion surface 15b is in contact with the lower push surface 6c and the second extrusion surface 15c is in contact with the upper push surface 6b, the drive reset upper die 15 begins to forcibly push the sliding forming lower die 6, the sliding forming lower die 6 continues to move forward, continuously compressing the reset drive spring 11; as Figure 15 The press slide continues to move downwards, driving the upper die 15 to push the lower die 6 to the set position. The outer side of the upper die 15 is in contact with the lower push surface 6c of the stroke groove, and the upper die bending punch 16 contacts the part to be bent 13a, thus initiating the bending stamping. Figure 16 At this point, the punch press slide reaches its lowest point, the mold is fully closed, the stripper plate 3 compresses the nitrogen spring 4, and the sliding forming lower mold 6 is fully driven into position by the drive reset upper mold 15. The bending portion 13a of the chuck workpiece 13 is pressed into the bending groove 19 by the punch and becomes U-shaped, thus completing the entire stamping process; Figure 17 At this time, the punch press slide begins to move upward, and the upper die holder 1 begins to move together with the punch press slide. The stripper plate 3 is held still by the nitrogen spring 4. The nitrogen spring 4 begins to reset, the stamped part remains still, and the drive reset upper die 15 is forced to return to its original position. The forced reset part 15a makes contact with the inner wall of the lower reset groove 18b, and the reset drive spring 11 drives the sliding forming lower die 6 to retract. Figure 18 At this time, the press slide continues to move upward, and the upper die holder 1 begins to move along with the press slide. The stripper plate 3 and nitrogen spring 4 return to their original positions and begin to move upward together with the upper die. The sliding forming lower die 6 is forced to return to its original position by the drive reset upper die 15. The part of the stamped part that was embedded in the sliding forming lower die 6 after bending is dislodged from the lower die due to the reset of the lower die. The lower die floating mechanism starts to work, lifting the chuck workpiece 13; Figure 19 The return stroke resets the die to the open state. At this point, the punch press slide reaches its highest point, the die is fully open, and the upper die is completely disengaged from the lower die. The process repeats after the feeder delivers the part from the previous process. Figure 7 action.

[0045] This invention can solve the problem that stamped parts cannot be removed from the mold after bending, and perfectly realizes the removal of the bent edge stamped by the chuck from the mold, and can have stable production capacity.

[0046] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A fuel tank chuck internal buckle bending and stamping device, comprising a corresponding upper die base and a lower die base, a stripper plate located between the upper die base and the lower die base, and a plurality of nitrogen springs disposed on the lower side of the upper die base corresponding to the stripper plate, the lower end of each nitrogen spring elastically abutting against the upper side of the stripper plate, characterized in that, The lower mold base is provided with a lower fixing plate, and the lower fixing plate is provided with a number of sets of sliding forming lower molds that are spaced apart circumferentially and can move radially. The lower side of the upper mold base is provided with a driving fixing plate, and the driving fixing plate is provided with a number of sets of upper mold assemblies that are spaced apart circumferentially corresponding to each sliding forming lower mold. The unloading plate is provided with a number of contouring pressing parts that are spaced apart circumferentially corresponding to each sliding forming lower mold, and each contouring pressing part is provided in a one-to-one correspondence with each set of upper mold assemblies.

2. The fuel tank chuck internal buckle bending and stamping device according to claim 1, characterized in that, The unloading plate, upper mold base, and lower mold base are all horizontally arranged, while the nitrogen spring is vertically arranged.

3. A fuel tank chuck internal buckle bending and stamping device according to claim 1 or 2, characterized in that, Each of the sliding forming lower dies is evenly distributed along the circumference. A sliding guide rail is provided on both sides of the circumferential edge of each sliding forming lower die on the lower fixed plate. The sliding forming lower die is movably connected to the two adjacent sliding guide rails in the corresponding circumferential direction. Each sliding forming lower die and each sliding guide rail are arranged alternately along the circumferential direction.

4. The fuel tank chuck internal buckle bending and stamping device according to claim 3, characterized in that, Each sliding forming lower die has a radially formed groove on the lower fixed plate. A travel limit pin is vertically fixed on the sliding forming lower die and extends downward into the corresponding groove. The travel limit pin fits against the inner wall of the inner end of the groove. A reset drive spring is radially provided between the travel limit pin and the inner wall of the outer end of the corresponding groove. A lower template is fixed on the upper side of the lower fixed plate.

5. The fuel tank chuck internal buckle bending and stamping device according to claim 4, characterized in that, A ring-shaped chuck workpiece to be bent and stamped is positioned between the upper die assembly, the contouring pressing component, and the lower sliding forming die. The outer circumference of the chuck workpiece has several L-shaped bending portions evenly distributed circumferentially. An arc-shaped transition portion is provided between the bending portions and the chuck workpiece. An annular clearance groove is provided at the bottom of the unloading plate corresponding to the chuck workpiece. Several embedding grooves are provided on the unloading plate corresponding to each contouring pressing component, with each embedding groove located above the clearance groove. Each contouring pressing component is fitted into its corresponding embedding groove. The contouring pressing component... The part is provided with a pressure groove, and the inner wall of the pressure groove is provided with a horizontal pressure surface one and an arc-shaped pressure surface two. After the chuck workpiece enters the clearance groove, the pressure surface one and the pressure surface two respectively press the upper end and the outer periphery of the annular chuck workpiece, and the horizontal section of the L-shaped part to be bent is in contact with the lower surface of the unloading plate; the upper die assembly includes a drive reset upper die and an upper die bending punch. The drive reset upper die and the upper die bending punch are located radially on the inner and outer sides of the corresponding conforming pressure component, respectively. The unloading plate is provided with several through holes corresponding to each drive reset upper die and upper die bending punch.

6. The fuel tank chuck internal buckle bending and stamping device according to claim 5, characterized in that, Both the drive reset upper die and the upper die bending punch are vertically arranged. The cross-section of the drive reset upper die is rectangular. A functional groove is provided on the lower outer side of the drive reset upper die, and a forced reset part is provided on the lower inner side of the drive reset upper die. The height of the functional groove is greater than the height of the forced reset part. The inner wall of the functional groove of the drive reset upper die has a vertical first extrusion surface and an inclined second extrusion surface. An arc-shaped connecting surface is provided between the first extrusion surface and the bottom surface of the drive reset upper die. An arc-shaped connecting surface is provided between the first extrusion surface and the second extrusion surface. An arc-shaped connecting surface is provided between the second extrusion surface and the outer side surface of the drive reset upper die. The bottom surface of the forced reset part is flush with the bottom surface of the drive reset upper die. An inclined reset extrusion surface is also provided on the forced reset part. An arc-shaped connecting surface is provided between the reset extrusion surface of the forced reset part and the bottom surface. An arc-shaped connecting surface is provided between the reset extrusion surface and the inner side surface of the drive reset upper die.

7. The fuel tank chuck internal buckle bending and stamping device according to claim 6, characterized in that, The sliding forming lower die has a stroke groove through which the driving reset upper die is opened. The stroke groove includes a main groove and an upper clearance groove and a lower reset groove located inside the main groove. The inner wall of the stroke groove has an inner limiting surface vertically. The outer wall of the stroke groove has an inclined upper pushing surface located above and a vertical lower pushing surface located below. The upper pushing surface and the lower pushing surface are provided with corresponding functional grooves. The lower reset groove is provided with a forced reset part. The distance between the inner and outer sides of the driving reset upper die is provided with a distance between the inner limiting surface and the lower pushing surface of the stroke groove. The outer side of the sliding forming lower die has a bending groove that can accommodate the bending part.

8. The fuel tank chuck internal buckle bending and stamping device according to claim 7, characterized in that, The lower template has mounting grooves for installing each sliding forming lower die. When the unloading plate moves downward until each conforming pressing component presses the upper end face and outer periphery of the annular chuck workpiece, each part to be bent is located between the sliding forming lower die and the inner wall of the mounting groove. When the drive reset upper die moves downward until its outer side contacts the lower push surface of the stroke groove of the sliding forming lower die, the sliding forming lower die moves outward to the lower side of the corresponding part to be bent. The horizontal section of the part to be bent is located between the conforming pressing component and the sliding forming lower die, and the upper die bending punch presses the part to be bent. When the upper die bending punch moves downward until the upper die reaches the lower dead point, the upper die bending punch bends the L-shaped part to be bent into a U-shape, and the sliding forming lower die is embedded in the U-shaped part to be bent.

9. The fuel tank chuck internal buckle bending and stamping device according to claim 8, characterized in that, When the upper drive reset die moves upward until the forced reset part reaches between the inner limiting surface and the lower push surface of the lower sliding forming die, the lower sliding forming die separates from the U-shaped part to be bent.

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