Stamping die for preventing a stamping body covering from being released from a mold

Abstract

The present application relates to the technical field of automobile body covering stamping die, and provides a stamping die for preventing stamping automobile body covering from being demolded and deformed, which comprises a die base, a top plate is arranged at the top end of the die base, an upper die is arranged below the top plate, a lower die is arranged at the top end of the die base, lateral separation mechanisms are arranged at the length direction sides of the lower die, composite positioning mechanisms are arranged at the inside width direction sides of the die base, and a top rod buffer mechanism is further arranged inside the die base; a hydraulic cylinder is fixedly installed at the upper end of the top plate, an installation plate is fixedly connected to the output end of the hydraulic cylinder, and the upper die is fixedly installed at the bottom end of the upper die. Through the above technical scheme, the technical problem that the fixed positioning pin hinders the falling of waste after stamping, the waste is easily stuck on the positioning pin, and the automatic production rhythm is affected in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of stamping dies for vehicle body panels, and more specifically, to a stamping die for preventing demolding deformation when stamping vehicle body panels. Background Technology

[0002] Automotive body panels are mostly thin-walled curved sheet metal parts, characterized by their thinness, complex curvature, weak rigidity, and high forming precision requirements. They are core components of automotive appearance quality. After the body panels are stamped, a large amount of unevenly distributed residual stress remains inside the sheet metal. During demolding and material removal, defects such as warping, dents, edge deformation, and edge misalignment are prone to occur, seriously affecting the product's appearance and assembly compatibility.

[0003] In existing technologies, large body panels are at risk of displacement during the stamping process. Due to the large area and thin thickness of the body panel blank, uneven stress during stamping can easily cause horizontal displacement, affecting forming accuracy. Existing positioning methods mostly use fixed positioning pins, but these pins can hinder the shedding of scrap after stamping, and scrap can easily get stuck on the positioning pins, affecting the automated production cycle. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a stamping die for preventing demolding deformation of stamped body panels, which solves the technical problem in the prior art that the fixed positioning pin will hinder the removal of scrap after stamping, and the scrap is easily stuck on the positioning pin, affecting the automated production cycle.

[0005] According to one aspect, at least one embodiment of the present invention provides a stamping die for preventing demolding deformation of a stamped body panel, comprising: a die base, a top plate mounted on the top of the die base, an upper die mounted below the top plate, a lower die mounted on the top of the die base, lateral separation mechanisms mounted on both sides of the lower die in the length direction, a composite positioning mechanism mounted on both sides of the die base in the internal width direction, and a push rod buffer mechanism mounted inside the die base; A hydraulic cylinder is fixedly installed at the upper end of the top plate, and an installation plate is fixedly connected to the output end of the hydraulic cylinder. The upper mold is fixedly installed at the bottom end of the upper mold. The lateral separation mechanism includes a forming side and an inclined block, the inclined block being fixedly installed on both sides of the bottom end of the upper mold; The composite positioning mechanism includes a positioning cylinder, a positioning pin, and a top post. The positioning cylinder is fixedly installed on one side of the mold base. The composite positioning mechanism is used to position the raw material and actively push away the scrap generated during stamping.

[0006] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, a connecting rod is fixedly connected to the output end of the positioning cylinder, a sliding block is fixedly connected to the upper end of the connecting rod, and a cam block is fixedly connected to the top end of the sliding block; The bottom ends of the positioning pin and the top material column are rotatably connected to pulleys, and the bottom ends of the pulleys abut against the upper surface of the sliding block or the top end of the cam block. Positioning sliders are fixedly connected to both sides of the lower end of the positioning pin and the top column. A limit rod is slidably installed at one end of the positioning slider. An auxiliary spring is sleeved on the surface of the limit rod above the positioning slider. The bottom end of the auxiliary spring is fixedly connected to the positioning slider.

[0007] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, a plurality of limiting grooves are symmetrically opened on both sides of the bottom of the lower die, and guide ramps are fixedly connected to both sides of the lower die in the width direction. The end of the guide ramp away from the lower die is flush with the edge of the die base, and a sliding roller is rotatably installed on the surface of the guide ramp.

[0008] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, a positioning groove and an ejector groove are provided on both sides of the lower die in the width direction, and an inner sliding groove is provided on both sides of the positioning groove and the ejector groove. The outer diameter of the positioning pin matches the inner diameter of the positioning groove, and the positioning pin is movably installed inside the positioning groove. The outer diameter of the top material column matches the inner diameter of the top material groove, and the top material column is movably installed inside the top material groove.

[0009] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, the limiting rod is fixedly installed inside the inner slide groove, the outer diameter of the sliding block matches the inner diameter of the inner slide groove, and the top end of the auxiliary spring is fixedly connected to the top and bottom of the inner slide groove.

[0010] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, symmetrical sliding cavities are provided on both sides of the inner width direction of the die base, the outer diameter of the sliding block matches the inner diameter of the sliding cavity, and the sliding block is slidably installed inside the sliding cavity.

[0011] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, a first limiting post is fixedly connected to each of the four corners of the bottom end of the top plate, the bottom end of the first limiting post is fixedly installed on the surface of the die base, and the first limiting post slides through the mounting plate.

[0012] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, a cutting groove is provided in the middle of the forming side, a side slider is fixedly connected to the bottom end of the forming side, a side positioning post is slidably connected to the side slider, the side positioning post is fixedly installed inside the limiting slide groove, a side spring is sleeved on the surface of the side positioning post, one end of the side spring is fixedly connected to the side slider, and the other end of the side spring is fixedly connected to the inner wall of the limiting slide groove.

[0013] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided in at least one embodiment of the present invention, the forming side is slidably mounted on both sides of the lower die in the length direction by the side slider; The upper mold has cutting blades fixedly connected to the bottom ends on both sides along its length, and the mold base also has an internal cavity.

[0014] For example, in a stamping die for preventing demolding deformation of a stamped body panel provided by at least one embodiment of the present invention, the ejector rod buffer mechanism includes an ejector cylinder and a second limiting post. The ejector cylinder is fixedly installed at the center of the bottom end inside the inner cavity. An ejector plate is fixedly connected to the output end of the ejector cylinder. A plurality of ejector rods are fixedly connected to the top end of the ejector plate. The top end of the ejector rod slides through the bottom end of the lower die, and the top surface of the ejector rod is flush with the inner bottom surface of the lower die. The second limiting post is fixedly installed on both sides inside the inner cavity. The second limiting post slides through both ends of the top plate, and the top plate is slidably installed inside the inner cavity through the second limiting post.

[0015] The beneficial effects of this invention are as follows: (1) In this invention, the composite positioning mechanism adopts a cam-pushing vertical lifting structure, which is converted into the vertical movement of the positioning pin and the ejector column through the horizontal drive of the positioning cylinder, so as to realize the dual functions of precise positioning of the sheet metal and active separation of scrap. Before stamping, the positioning pin extends to position, which can effectively limit the offset and movement of the sheet metal during the stamping process and ensure the stability of the workpiece forming dimensions; after stamping, the ejector column actively lifts the scrap, realizing the automatic separation of the scrap and the formed workpiece, and avoiding the scrap sticking to the workpiece and causing pulling deformation when demolding. The reset structure with limit rod and auxiliary spring can ensure smooth operation of the positioning structure, timely reset, strong structural linkage and low failure rate. The combination of guide ramp and sliding roller can reduce the frictional resistance of the sheet metal loading and unloading, protect the integrity of the sheet metal surface, and facilitate the rapid unloading of scrap.

[0016] (2) In this invention, a side separation mechanism with adaptive sliding reset is provided, which differs from the traditional fixed side forming structure. During the mold closing process, the inclined block extrudes the forming side to fit inward against the workpiece, ensuring the forming accuracy of the workpiece side; during the mold opening process, the forming side automatically retracts and resets through the elastic force of the side spring, quickly separating from the workpiece side surface. This structure can completely eliminate the contact pressure and frictional resistance between the mold sidewall and the forming workpiece, avoiding the workpiece side being pulled or scratched by the mold during the mold opening and demolding stages, effectively improving problems such as workpiece edge warping, deformation, and burrs. At the same time, the forming side integrates a cutting groove structure, which can be used with a cutting knife to realize the simultaneous completion of stamping and scrap trimming, simplifying the production process and improving processing efficiency.

[0017] (3) In this invention, the ejector rod buffer mechanism adopts a multi-point uniform ejection structure, coupled with the second limiting post for full-process guidance. Compared with the traditional single-point rigid ejection structure, it can significantly increase the force-bearing area of ​​the workpiece, disperse the ejection force, and avoid the deformation of the thin-walled cover part due to local force concentration, such as indentation, dent, and bulge. The ejector rod is initially flush with the bottom surface of the mold cavity, which will not interfere with the stamping process of the sheet metal. The ejection process is stable and uniform, which can realize the slow and uniform demolding of the workpiece, allowing the residual stress inside the workpiece to be released gradually and uniformly, avoiding the overall warping and twisting problems caused by the instantaneous release of stress, and significantly improving the forming flatness of the workpiece after demolding. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the upper mold structure in the embodiment; Figure 3 for Figure 1 A schematic diagram of the lower mold structure in the embodiment; Figure 4 for Figure 3 An enlarged schematic diagram of part A in the embodiment; Figure 5 for Figure 1 A schematic diagram of the composite positioning mechanism structure in the embodiment; Figure 6 for Figure 1 A schematic diagram of the planar structure of the composite positioning mechanism in the embodiment; Figure 7 for Figure 1 A schematic diagram of the top rod buffer mechanism in the embodiment.

[0020] In the diagram: 1. Mold base; 11. Slide cavity; 12. Inner cavity; 2. Top plate; 21. First limiting post; 22. Hydraulic cylinder; 23. Mounting plate; 3. Upper mold; 31. Cutting blade; 4. Lower mold; 41. Limiting slide groove; 42. Guide ramp; 43. Sliding roller; 44. Positioning groove; 45. Ejector groove; 46. Inner slide groove; 5. Lateral separation mechanism; 51. Molding side; 52. Side slider; 53. Side 54. Positioning pin; 55. Side spring; 56. Inclined block; 57. Knife groove; 68. Compound positioning mechanism; 69. Positioning cylinder; 60. Connecting rod; 61. Sliding block; 62. Cam block; 63. Positioning pin; 64. Top material pin; 65. Pulley; 66. Positioning slider; 67. Limiting rod; 68. Auxiliary spring; 79. Top rod buffer mechanism; 70. Top material cylinder; 71. Top material plate; 72. Top rod; 73. Second limiting pin. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1-6 As shown, it illustrates a stamping die for preventing demolding deformation of a stamped body panel according to an embodiment of the present invention, comprising: a die base 1, a top plate 2 mounted on the top of the die base 1, an upper die 3 mounted below the top plate 2, a lower die 4 mounted on the top of the die base 1, lateral separation mechanisms 5 mounted on both sides of the lower die 4 in the length direction, a composite positioning mechanism 6 mounted on both sides of the inner width direction of the die base 1, and a push rod buffer mechanism 7 also mounted inside the die base 1; A hydraulic cylinder 22 is fixedly installed at the upper end of the top plate 2, and an installation plate 23 is fixedly connected to the output end of the hydraulic cylinder 22. The upper mold 3 is fixedly installed at the bottom end of the upper mold 3. The lateral separation mechanism 5 includes a forming side 51 and an inclined block 55, with the inclined block 55 fixedly installed on both sides of the bottom end of the upper mold 3. The composite positioning mechanism 6 includes a positioning cylinder 61, a positioning pin 65, and a ejector pin 66. The positioning cylinder 61 is fixedly installed on one side of the mold base 1. The composite positioning mechanism 6 is used to position the raw material and actively push away the scrap generated by stamping.

[0027] The output end of the positioning cylinder 61 is fixedly connected to a connecting rod 62, the upper end of the connecting rod 62 is fixedly connected to a sliding block 63, and the top end of the sliding block 63 is fixedly connected to a cam block 64. The bottom ends of the positioning pin 65 and the top material column 66 are rotatably connected to pulleys 67, and the bottom end of the pulleys 67 abuts against the upper surface of the sliding block 63 or the top end of the cam block 64. Positioning pin 65 and top column 66 are fixedly connected to positioning sliders 68 on both sides of their lower ends. A limit rod 69 is slidably installed on one end of the positioning slider 68. An auxiliary spring 610 is sleeved on the surface of the limit rod 69 located above the positioning slider 68. The bottom end of the auxiliary spring 610 is fixedly connected to the sliding block 63.

[0028] Multiple limiting grooves 41 are symmetrically opened on both sides of the bottom of the lower mold 4. Guide ramps 42 are fixedly connected to both sides of the width direction of the lower mold 4. The end of the guide ramp 42 away from the lower mold 4 is flush with the edge of the mold base 1. A sliding roller 43 is rotatably installed on the surface of the guide ramp 42.

[0029] The lower mold 4 has a positioning groove 44 and an ejector groove 45 on both sides in the width direction, and an inner sliding groove 46 is provided on both sides of the positioning groove 44 and the ejector groove 45. The outer diameter of the locating pin 65 matches the inner diameter of the locating groove 44, and the locating pin 65 is movably installed inside the locating groove 44. The outer diameter of the top material column 66 matches the inner diameter of the top material groove 45, and the top material column 66 is movably installed inside the top material groove 45.

[0030] The limiting rod 69 is fixedly installed inside the inner slide groove 46. The outer diameter of the sliding block 63 matches the inner diameter of the inner slide groove 46. The top of the auxiliary spring 610 is fixedly connected to the top and bottom of the inner slide groove 46.

[0031] This embodiment provides a stamping die for preventing demolding deformation of stamped body panels. The positioning cylinder 61 in the composite positioning mechanism 6 drives the sliding block 63 and the cam block 64 to slide horizontally through the connecting rod 62, so that a single power source can simultaneously control the lifting and lowering of the positioning pin 65 and the ejector pin 66, which helps to reduce the number of driving components, reduce equipment costs and control system complexity.

[0032] The engagement between the pulley 67, which is rotatably connected to the bottom of the locating pin 65 and the top of the ejector pin 66, and the upper surface of the sliding block 63 or the top of the cam block 64, converts the horizontal sliding of the sliding block 63 into the vertical movement of the locating pin 65 and the ejector pin 66. This method results in high motion conversion efficiency and a simple structure. The rolling contact between the pulley 67 and the surface of the cam block 64 helps reduce frictional resistance during movement and minimizes component wear.

[0033] The specific arrangement of the locating pin 65 being movably installed in the locating groove 44 and the ejector pin 66 being movably installed in the ejector groove 45 restricts the vertical movement of the locating pin 65 and the ejector pin 66 within their respective slots, helping to ensure the accuracy of the movement direction. Before mold closing, the locating pin 65 extends out of the locating groove 44 to insert into the blank's locating hole. During the mold closing and stamping process, it remains extended to prevent blank displacement. After stamping, it retracts into the locating groove 44 to release scrap material, thus integrating positioning and waste removal functions.

[0034] The auxiliary spring 610 is disposed on the surface of the limiting rod 69 above the positioning slider 68. The bottom end of the auxiliary spring 610 is fixedly connected to the positioning slider 68, and the top end is fixedly connected to the bottom of the top of the inner slide groove 46. When the positioning slider 68 moves downward, the auxiliary spring 610 is compressed. When the positioning cylinder 61 resets, the auxiliary spring 610 releases its elastic force to help the positioning slider 68 reset upward, which helps to improve the reset speed and reliability of the positioning pin 65 and the top material column 66.

[0035] The sliding block 63 is slidably installed inside the inner slide groove 46, which restricts the sliding trajectory of the sliding block 63 within the inner slide groove 46, helping to ensure the linearity of the vertical movement of the positioning pin 65 and the top material column 66. The sliding block 63 is also slidably installed inside the slide cavity 11, which restricts the sliding trajectory of the sliding block 63 within the slide cavity 11, helping to ensure the linearity of the horizontal movement of the sliding block 63, thereby ensuring the matching accuracy of the cam block 64 and the pulley 67.

[0036] The guide ramps 42 and sliding rollers 43 fixedly connected to both sides of the lower mold 4 in the width direction and the sliding rollers 43 rotatably mounted on their surfaces, when the scrap material pushed out by the ejector pin 66 slides down the guide ramps 42, the rolling action of the sliding rollers 43 converts the sliding friction into rolling friction, which helps to reduce the resistance of the scrap material sliding down and makes the scrap material exit the mold area more smoothly.

[0037] like Figures 1 to 7 As shown, it illustrates a stamping die for preventing demolding deformation of a stamped body panel according to an embodiment of the present invention, comprising: a mold base 1 with symmetrically opened sliding cavities 11 on both sides in the internal width direction, the outer diameter of the sliding block 63 matching the inner diameter of the sliding cavity 11, and the sliding block 63 being slidably installed inside the sliding cavity 11.

[0038] The top plate 2 has four fixed corners at the bottom, each with a first limiting post 21. The bottom of the first limiting post 21 is fixedly installed on the surface of the mold base 1, and the first limiting post 21 slides through the mounting plate 23.

[0039] A groove 56 is provided in the middle of the forming side 51. A side slider 52 is fixedly connected to the bottom end of the forming side 51. A side positioning post 53 is slidably connected to the side slider 52. The side positioning post 53 is fixedly installed inside the limiting slide groove 41. A side spring 54 is sleeved on the surface of the side positioning post 53. One end of the side spring 54 is fixedly connected to the side slider 52, and the other end of the side spring 54 is fixedly connected to the inner wall of the limiting slide groove 41.

[0040] The forming side 51 is slidably mounted on both sides of the lower mold 4 along its length via the side slider 52; Cutting blades 31 are fixedly connected to the bottom ends of both sides of the upper mold 3 along its length, and an inner cavity 12 is also provided inside the mold base 1.

[0041] The ejector rod buffer mechanism 7 includes an ejector cylinder 71 and a second limiting post 74. The ejector cylinder 71 is fixedly installed at the center of the bottom end inside the inner cavity 12. The output end of the ejector cylinder 71 is fixedly connected to an ejector plate 72. The top end of the ejector plate 72 is fixedly connected to a plurality of ejector rods 73. The top end of the ejector rods 73 slides through the bottom end of the lower mold 4, and the top surface of the ejector rods 73 is flush with the inner bottom surface of the lower mold 4. The second limiting post 74 is fixedly installed on both sides inside the inner cavity 12. The second limiting post 74 slides through both ends of the top plate 72, and the top plate 72 is slidably installed inside the inner cavity 12 through the second limiting post 74.

[0042] This embodiment provides a stamping die for preventing demolding deformation of stamped body panels. The lateral separation mechanism 5 features inclined blocks 55 fixedly installed on both sides of the bottom end of the upper die 3, and forming sides 51 slidably installed on both sides of the lower die 4 along its length via side sliders 52. As the upper die 3 moves upward, the inclined blocks 55 disengage from the forming sides 51, and the side springs 54 push the forming sides 51 to slide outward, completing the lateral separation action. This process requires no additional power source, and the timing of the action is synchronized with the mold opening process, helping to reduce the complexity of equipment control.

[0043] The groove 56 structure in the middle of the forming side 51 provides a space for the cutting blade 31 of the upper mold 3 during the mold closing process, so that the cutting blade 31 can pass through the forming side 51 to cut the scrap material, without affecting the forming function of the forming side 51 to the side wall of the cover part, which helps to realize the online division of scrap material.

[0044] The arrangement of the side springs 54 sleeved on the surface of the side positioning posts 53 ensures that the compression and extension movements of the side springs 54 occur along a fixed axis, which helps to ensure the consistency of the movement direction of the formed side 51 during the sliding process. The side positioning posts 53 also serve as guides and limiters, which helps to simplify the mechanism structure.

[0045] The limiting groove 41 restricts the sliding range of the side slider 52, so that the sliding stroke of the molding side 51 is limited to the set range, thus avoiding excessive sliding of the side slider 52 and interference with other components.

[0046] The top rod buffer mechanism 7 has a structure in which the top material cylinder 71 is fixedly installed at the bottom of the inner cavity 12, and the top material plate 72 is slidably engaged with the second limiting post 74. This structure allows the vertical movement of the top material plate 72 to be precisely guided by the second limiting post 74, which helps to ensure that each top rod 73 rises synchronously and makes the distribution of the ejection force on the bottom surface of the cover more uniform.

[0047] The top surface of the ejector pin 73 is flush with the inner bottom surface of the lower mold 4. During the stamping process, the ejector pin 73 does not participate in the formation of the forming surface, thus avoiding its impact on the surface quality of the cover part. During demolding, the ejector pin 73 pushes the cover part out, and the ejection force is distributed across the bottom surface of the cover part through multiple points, which helps to reduce the risk of localized dents in the cover part due to excessive force at a single point.

[0048] Specific operation process: In the initial state, the positioning cylinder 61 is in the retracted state, the sliding block 63 is in the initial position of the sliding cavity 11, and the lowest point of the cam block 64 is in contact with the pulley 67. Under the action of the auxiliary spring 610, the positioning pin 65 is in the state of extending out of the positioning groove 44, and the upper guide part of the positioning pin 65 is higher than the upper surface of the lower mold 4. Under the action of the auxiliary spring 610, the ejector pin 66 is in the state of retracting into the ejector groove 45, and the ball end of the ejector pin 66 is lower than the upper surface of the lower mold 4.

[0049] The blank is placed on the upper surface of the lower die 4, and the pre-drilled positioning holes on the blank are aligned with the tapered guide of the positioning pin 65 and the positioning pin 65 is inserted. The positioning pin 65 positions the blank horizontally to prevent the blank from shifting horizontally during subsequent stamping. Hydraulic cylinder 22 is activated, pushing mounting plate 23 and upper mold 3 downward along the first limiting post 21. During the downward movement of upper mold 3, the inclined surface of tilting block 55 first contacts the mating inclined surface of forming side 51, pushing forming side 51 to slide along side positioning post 53 towards the center of lower mold 4 via side slider 52. Side spring 54 is compressed during this process; The upper die 3 continues to descend, and the punch enters the concave die cavity, cooperating with the lower die 4 to complete the stamping of the cover part. Simultaneously, the cutting blade 31 descends with the upper die 3, passing through the cutting groove 56 of the forming side 51, and cooperating with the trimming edge of the lower die 4 to cut the annular scrap around the blank into left and right halves from the middle position. During the stamping process, the locating pin 65 remains extended, and the cylindrical mating part of the locating pin 65 engages with the locating hole in the blank to prevent the blank from shifting horizontally due to uneven force. After stamping, the hydraulic cylinder 22 reverses its direction, causing the mounting plate 23 and the upper mold 3 to move upwards along the first limiting post 21. The tilting block 55 moves upwards with the upper mold 3, disengaging from the mating inclined surface of the forming side 51. The side spring 54 releases its elastic potential energy, pushing the side slider 52 and the forming side 51 to slide and reset along the side positioning post 53 in a direction away from the center of the lower mold 4. The forming side 51 slides outwards, creating a separation gap between the inner surface of the forming side 51 and the side wall of the forming cover, completing the lateral separation action.

[0050] After the upper mold 3 has fully risen, the positioning cylinder 61 is activated. The positioning cylinder 61 pushes the connecting rod 62 and the sliding block 63 to slide horizontally along the sliding cavity 11 toward the interior of the mold base 1. During the sliding process, the surface of the sliding block 63 that contacts the bottom pulley 67 of the positioning pin 65 transitions from the upper surface of the sliding block 63 to the top of the cam block 64; First, the pulley 67 at the bottom of the locating pin 65 rolls along the upper surface of the sliding block 63. Since the upper surface of the sliding block 63 is horizontal, the locating pin 65 remains extended during this stage, and the scrap material is still fitted onto the locating pin 65. Subsequently, pulley 67 rolls to the top of cam block 64. The top of cam block 64 is an arc-shaped protrusion. As sliding block 63 continues to slide, the top of cam block 64 pushes locating pin 65 upward. However, because the upper end of locating pin 65 is restricted by scrap material and locating groove 44, locating pin 65 cannot move upward. In fact, locating pin 65 remains stationary relative to lower mold 4. The continued sliding of sliding block 63 and cam block 64 causes pulley 67 at the bottom of locating pin 65 to be pushed upward by cam block 64. Locating pin 65 is subjected to a downward reaction force. This reaction force is transmitted to locating cylinder 61 through pulley 67, cam block 64, sliding block 63, and connecting rod 62. At the same time, locating pin 65 compresses auxiliary spring 610 downward. Locating pin 65 overcomes the elastic force of auxiliary spring 610 and moves downward, retracting into locating groove 44. During the retraction of locating pin 65, its guide part and cylindrical mating part exit from the locating hole of scrap material, allowing scrap material to escape the constraint of locating pin 65. The locating pin 65 continues to move downwards until the locating slider 68 contacts the bottom of the inner groove 46 or the upper end face of the locating pin 65 is lower than the upper surface of the lower mold 4. At this point, the scrap material fitted onto the locating pin 65 has completely detached from the locating pin 65.

[0051] The sliding block 63 continues to slide, and the pulley 67 at the bottom of the ejector pin 66 rolls from the upper surface of the sliding block 63 to the top of the cam block 64. The top of the cam block 64 pushes the ejector pin 66 upward, and the ejector pin 66 moves upward against the elastic force of the auxiliary spring 610, extending out of the ejector groove 45. The ball end of the ejector pin 66 contacts the lower surface of the scrap material, pushing the scrap material upward. Since the ejector pins 66 are located on both sides of the width direction of the lower mold 4, and the ejector pins 66 on both sides extend synchronously, the left half and the right half of the scrap material are respectively pushed up by the ejector pins 66 on both sides.

[0052] The scrap material, pushed upwards by the ball end of the ejector pin 66, moves along the axis (vertical direction) of the ejector pin 66. Then, under its own weight and the lateral force of the ball end of the ejector pin 66, it slides away from the center of the lower mold 4. The scrap material slides onto the upper surface of the guide ramp 42, and with the rolling assistance of the sliding roller 43, slides out of the mold area along the guide ramp 42 and falls into the pre-set waste collection device.

[0053] After the scrap material is discharged, the ejector cylinder 71 is activated. The ejector cylinder 71 pushes the ejector plate 72 upward along the second limit post 74. The ejector plate 72 drives each ejector rod 73 to move upward synchronously. The top of the ejector rod 73 extends from the inner bottom surface of the lower mold 4 and contacts the bottom surface of the molded cover. Since there are multiple ejector rods 73 and they are evenly distributed, the ejection force is evenly distributed on the bottom surface of the cover.

[0054] The ejector pin 73 continues to move upward, pushing the molded cover out of the concave mold cavity. Since the lateral separation mechanism 5 has completed the lateral separation, there is a separation gap between the side wall of the molded cover and the molded side edge 51, so the side wall will not rub against the mold when the cover is ejected.

[0055] After the cover is pushed out to a predetermined height by the push rod 73, the cover is removed from the mold area by a robot or manually.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A stamping die for preventing demolding deformation of stamped body panels, characterized in that, include: A mold base (1) is provided with a top plate (2) at the top of the mold base (1), an upper mold (3) is provided below the top plate (2), a lower mold (4) is provided at the top of the mold base (1), a lateral separation mechanism (5) is provided on both sides of the length direction of the lower mold (4), a composite positioning mechanism (6) is provided on both sides of the internal width direction of the mold base (1), and a push rod buffer mechanism (7) is also provided inside the mold base (1). A hydraulic cylinder (22) is fixedly installed at the upper end of the top plate (2), and an installation plate (23) is fixedly connected to the output end of the hydraulic cylinder (22). The upper mold (3) is fixedly installed at the bottom end of the upper mold (3). The lateral separation mechanism (5) includes a forming side (51) and an inclined block (55), the inclined block (55) being fixedly installed on both sides of the bottom end of the upper mold (3); The composite positioning mechanism (6) includes a positioning cylinder (61), a positioning pin (65), and a top material column (66). The positioning cylinder (61) is fixedly installed on one side of the mold base (1). The composite positioning mechanism (6) is used to position the raw material and actively push away the scrap generated by stamping.

2. The stamping die for preventing demolding deformation of stamped body panels according to claim 1, characterized in that, The output end of the positioning cylinder (61) is fixedly connected to a connecting rod (62), the upper end of the connecting rod (62) is fixedly connected to a sliding block (63), and the top end of the sliding block (63) is fixedly connected to a cam block (64). The bottom ends of the positioning pin (65) and the top material column (66) are rotatably connected to pulleys (67), and the bottom end of the pulleys (67) abuts against the upper surface of the sliding block (63) or the top end of the cam block (64). Positioning sliders (68) are fixedly connected to both sides of the lower end of the positioning pin (65) and the top column (66). A limiting rod (69) is slidably installed at one end of the positioning slider (68). An auxiliary spring (610) is sleeved on the surface of the portion of the limiting rod (69) above the positioning slider (68). The bottom end of the auxiliary spring (610) is fixedly connected to the positioning slider (68).

3. The stamping die for preventing demolding deformation of stamped body panels according to claim 2, characterized in that, Multiple limiting grooves (41) are symmetrically opened on both sides of the bottom of the lower mold (4). Guide ramps (42) are fixedly connected on both sides of the width direction of the lower mold (4). The end of the guide ramp (42) away from the lower mold (4) is flush with the edge of the mold base (1). A sliding roller (43) is rotatably installed on the surface of the guide ramp (42).

4. The stamping die for preventing demolding deformation of stamped body panels according to claim 3, characterized in that, The lower mold (4) has a positioning groove (44) and an ejector groove (45) on both sides in the width direction, and an inner sliding groove (46) is provided on both sides of the positioning groove (44) and the ejector groove (45). The outer diameter of the positioning pin (65) matches the inner diameter of the positioning groove (44), and the positioning pin (65) is movably installed inside the positioning groove (44). The outer diameter of the top material column (66) matches the inner diameter of the top material groove (45), and the top material column (66) is movably installed inside the top material groove (45).

5. A stamping die for preventing demolding deformation of stamped body panels according to claim 4, characterized in that, The limiting rod (69) is fixedly installed inside the inner slide groove (46), the outer diameter of the sliding block (63) matches the inner diameter of the inner slide groove (46), and the top end of the auxiliary spring (610) is fixedly connected to the top and bottom of the inner slide groove (46).

6. A stamping die for preventing demolding deformation of stamped body panels according to claim 5, characterized in that, The mold base (1) has symmetrical sliding cavities (11) on both sides in the width direction. The outer diameter of the sliding block (63) matches the inner diameter of the sliding cavity (11). The sliding block (63) is slidably installed inside the sliding cavity (11).

7. A stamping die for preventing demolding deformation of stamped body panels according to claim 6, characterized in that, The top plate (2) has four fixed corners at the bottom, each connected to a first limiting post (21). The bottom of the first limiting post (21) is fixedly installed on the surface of the mold base (1). The first limiting post (21) slides through the mounting plate (23).

8. A stamping die for preventing demolding deformation of stamped body panels according to claim 7, characterized in that, A cutting groove (56) is provided in the middle of the forming side (51). A side slider (52) is fixedly connected to the bottom end of the forming side (51). A side positioning post (53) is slidably connected to the side slider (52). The side positioning post (53) is fixedly installed inside the limiting slide groove (41). A side spring (54) is sleeved on the surface of the side positioning post (53). One end of the side spring (54) is fixedly connected to the side slider (52), and the other end of the side spring (54) is fixedly connected to the inner wall of the limiting slide groove (41).

9. A stamping die for preventing demolding deformation of stamped body panels according to claim 8, characterized in that, The forming side (51) is slidably mounted on both sides of the lower mold (4) in the length direction via the side slider (52); The upper mold (3) has a cutting blade (31) fixedly connected to the bottom of both sides along its length, and the mold base (1) also has an inner cavity (12).

10. A stamping die for preventing demolding deformation of stamped body panels according to claim 9, characterized in that, The push rod buffer mechanism (7) includes a push cylinder (71) and a second limiting post (74). The push cylinder (71) is fixedly installed at the center of the bottom end inside the inner cavity (12). The output end of the push cylinder (71) is fixedly connected to a push plate (72). The top end of the push plate (72) is fixedly connected to a plurality of push rods (73). The top end of the push rods (73) slides through the bottom end of the lower mold (4), and the top surface of the push rods (73) is flush with the inner bottom surface of the lower mold (4). The second limiting post (74) is fixedly installed on both sides inside the inner cavity (12). The second limiting post (74) slides through both ends of the top plate (72). The top plate (72) is slidably installed inside the inner cavity (12) through the second limiting post (74).

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