A precision cold stamping forming die

Abstract

The application discloses a precision cold-punching forming die and relates to the technical field of cold-punching dies.The precision cold-punching forming die comprises a workbench and a core-pulling assembly.A lower die is slidably connected to the middle part of the workbench, and a stand is arranged on the top of the workbench.A hydraulic cylinder is fixedly connected to the top of the stand, and a lifting seat is connected to the output end of the hydraulic cylinder.A rotating assembly is arranged on the bottom of the lifting seat, and an upper die assembly is arranged on the bottom of the rotating assembly.The upper die assembly is automatically closed and the inner wall of the lower die is circumferentially limited, so that the upper die module is effectively prevented from being separated and misaligned during the stamping process, the precision of the forming size is ensured, the pin core is automatically inserted when the lower die is lowered, the hole part is accurately formed, the core is automatically pulled out when the die is opened, no independent driving device is needed, the die structure is simplified, the manufacturing cost is reduced, the product is automatically taken out by the wrapping force of the upper die after forming, the manual taking step is saved, the cycle time is shortened, and the production efficiency and operation safety are improved.

Description

Technical Field

[0001] This invention relates to the field of cold stamping die technology, specifically to a precision cold stamping forming die. Background Technology

[0002] Cold stamping, also known as cold pressing, is a processing technology that uses pressure equipment and special molds to apply external force to metal sheets at room temperature, causing the material to undergo plastic deformation or separation, directly obtaining parts of the required shape and size. It does not require heating the blank and has the characteristics of fast production speed, good consistency, and suitability for mass production. It is widely used in the manufacturing of sheet metal housings, hardware connectors, and automotive parts.

[0003] For example, patent CN205763375U discloses a cold stamping forming die for automobile frames. This patent uses half-clamp cold stamping and is equipped with an automatic demolding mechanism, which has the characteristics of convenient demolding, high pass rate and high production efficiency, and is particularly suitable for large-scale assembly line operations. However, during use, the cylindrical workpiece is formed by extrusion from the outside. After forming, burrs are easily generated at the mold-closing interface of the two half-clamp blocks, which reduces the dimensional accuracy of the workpiece. Summary of the Invention

[0004] The purpose of this invention is to provide a precision cold stamping die to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a precision cold stamping forming die, comprising a worktable and a core-pulling assembly, wherein a lower die is slidably connected to the middle of the worktable, and a support frame is mounted on the top of the worktable; a hydraulic cylinder is fixedly connected to the top of the support frame, and a lifting seat is connected to the output end of the hydraulic cylinder; a rotating assembly is mounted at the bottom of the lifting seat, and an upper die assembly is mounted at the bottom of the rotating assembly; the core-pulling assembly is located at the lower part of the lower die, and the core-pulling assembly includes a pad; a pad is fixedly connected to the bottom of the lower die, and a support spring is sleeved on the outer side of the pad; a stop bar is mounted on the outer side of the support spring, and a pin is slidably connected inside the support spring; a drive rod is mounted at one end of the pin, and a slotted plate is sleeved on the outer side of the drive rod.

[0006] Furthermore, the upper and lower ends of the support spring abut against the lower mold and the worktable respectively, and the worktable is fixedly connected to the slotted plate.

[0007] Furthermore, the rotating assembly includes a guide rod, which is fixedly connected to the middle of one end of the upright frame. A guide groove is provided on the outer side of the guide rod, and a ball sleeve is fitted on the outer side of the guide rod. Balls are installed inside the ball sleeve and are placed in the guide groove and can roll along the guide groove. A gear is connected to the outer side of the ball sleeve through a one-way bearing, and a gear ring meshes with the outer side of the gear. A rotating seat is fixedly connected to the outer side of the gear ring, and a positioning groove is provided on the outer circumferential surface of the rotating seat. A ball screw is installed at the bottom of the lifting seat.

[0008] Furthermore, the guide groove is composed of an upper vertical groove, a spiral groove, and a lower vertical groove connected from top to bottom, and there are two guide grooves.

[0009] Furthermore, the ball bearing sleeve is rotatably connected to the lifting seat, and the lifting seat is slidably connected to the rotating seat.

[0010] Furthermore, the upper mold assembly includes a lifting lug, the bottom of the rotating seat is fixedly connected to the lifting lug, and a connecting rod is slidably connected inside the lifting lug. A compression spring is sleeved on the outside of the connecting rod, and one end of the connecting rod is fixedly connected to the upper module. A protruding post is provided inside the upper module, and a side plate is placed at the other end of the connecting rod. A sliding post is rotatably connected to the lower part of the side plate.

[0011] Furthermore, the two ends of the compression spring abut against the lifting lug and the upper module respectively, and the upper module is slidably connected to the rotating seat.

[0012] Furthermore, a discharge platform is provided on one side of the workbench, and a support plate is installed on the upper part of one side of the workbench, with guide blocks symmetrically arranged on one side of the support plate.

[0013] Furthermore, a receiving assembly is connected to one side of the lifting seat, and the receiving assembly includes a pressure frame. The pressure frame is installed on one side of the lifting seat, and a clearance groove is opened on one side of the middle part of the pressure frame. The lower part of the pressure frame abuts against a pulley seat, and one end of the pulley seat is connected to a drive shaft. The drive shaft is rotatably connected to the worktable through a damping bearing. A receiving frame is fixedly connected to the end of the drive shaft, and one side of the receiving frame abuts against an elastic plate. The elastic plate is fixedly connected to the unloading table.

[0014] Furthermore, a constant force spring is rotatably connected to one side of the receiving frame, and a baffle is fixedly connected to the end of the constant force spring. A light rod is slidably connected inside the lower end of the baffle, and the light rod is fixedly connected to the receiving frame. A buffer head is installed at the bottom of the light rod.

[0015] This invention provides a precision cold stamping forming die, which has the following beneficial effects: 1. This invention effectively prevents the upper die from separating and misaligning during stamping by automatically closing the upper die assembly and circumferentially limiting the inner wall of the lower die, thus ensuring the precision of the formed dimensions. At the same time, the pin core is automatically inserted synchronously when the lower die moves downward, achieving precise forming of the hole. The core is automatically pulled out when the die is opened, eliminating the need for an independent drive device, simplifying the mold structure, reducing manufacturing costs, and automatically pulling out the formed product by the clamping force of the upper die, eliminating the need for manual material handling, shortening the cycle time, and improving production efficiency and operational safety.

[0016] 2. This invention utilizes the single lifting power of the lifting seat to achieve a time-sharing action logic of automatic upward rotation and stable downward stamping through a spiral groove and unidirectional transmission structure. It eliminates the need for additional independent rotation drive and indexing mechanism, greatly simplifying the mold structure and shortening the single-process cycle. During the rotation process, the elastic holding and shaft hole locking form a double fixation, effectively preventing the product from loosening and falling off. After reaching the position, it automatically locks to ensure the mold closing and alignment accuracy. During unloading, the upper module is automatically separated and the product is unloaded by its own weight through pure mechanical linkage guided by the inclined plane. There is no need to add additional drive source and electrical control components, reducing manufacturing costs and energy consumption, and realizing efficient production of continuous cold stamping.

[0017] 3. This invention achieves the entire process of automatic vertical feeding, slow reverse rotation, and horizontal unloading of the receiving frame through pure mechanical linkage, without the need for additional drive or manual intervention. During the feeding process, the baffle automatically closes the side opening, providing full circumferential protection and preventing product collisions. After the product falls in, the receiving frame rotates smoothly under damping to prevent it from being thrown out or impacted. During unloading, the baffle automatically opens, and the product rolls out smoothly. The entire set of actions is smoothly connected, effectively avoiding the adverse effects of unloading impact on product precision and ensuring the consistency of molding quality and batch size. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a precision cold stamping forming die according to the present invention; Figure 2 This is a schematic diagram of the rotating component structure of a precision cold stamping die according to the present invention; Figure 3 This is a schematic diagram of the upper mold assembly structure of a precision cold stamping forming die according to the present invention; Figure 4 This is a schematic diagram of the core-pulling component structure of a precision cold stamping forming die according to the present invention; Figure 5 This is a schematic diagram of the lower die cross-sectional structure of a precision cold stamping forming die according to the present invention; Figure 6 This is a schematic diagram of the material receiving assembly structure of a precision cold stamping die according to the present invention; Figure 7 This is a schematic diagram of the baffle structure of a precision cold stamping forming die according to the present invention.

[0019] In the diagram: 1. Workbench; 2. Lower mold; 3. Stand; 4. Hydraulic cylinder; 5. Lifting seat; 6. Rotating assembly; 601. Guide rod; 602. Guide groove; 603. Ball sleeve; 604. Gear; 605. Gear ring; 606. Rotating seat; 607. Positioning groove; 608. Ball screw; 7. Upper mold assembly; 701. Lifting lug; 702. Connecting rod; 703. Compression spring; 704. Upper module; 705. Protruding column; 706. Side plate; 707. Sliding column; 8. Core pulling device. Components; 801, pad block; 802, support spring; 803, stop bar; 804, pin; 805, drive rod; 806, slotted plate; 9, unloading platform; 10, support plate; 11, guide block; 12, receiving assembly; 1201, pressure frame; 1202, clearance groove; 1203, pulley seat; 1204, drive shaft; 1205, receiving frame; 1206, elastic plate; 1207, constant force spring; 1208, baffle; 1209, smooth rod; 1210, buffer head. Detailed Implementation

[0020] Please see Figures 1 to 5 The present invention provides a technical solution: a precision cold stamping forming mold, comprising a worktable 1 and a core-pulling assembly 8. A lower mold 2 is slidably connected to the middle of the worktable 1, and a support frame 3 is mounted on the top of the worktable 1. A hydraulic cylinder 4 is fixedly connected to the top of the support frame 3, and the output end of the hydraulic cylinder 4 is connected to a lifting seat 5. A rotating assembly 6 is mounted at the bottom of the lifting seat 5, and an upper mold assembly 7 is mounted at the bottom of the rotating assembly 6. The core-pulling assembly 8 is located at the lower part of the lower mold 2, and the core-pulling assembly 8 includes a pad block 801. A pad block 801 is fixedly connected to the bottom of the lower mold 2, and a support spring 802 is sleeved on the outside of the pad block 801. A stop strip 803 is installed on the outside of the support spring 802, and a pin 804 is slidably connected inside the support spring 802. A drive rod 805 is installed at one end of the pin 804, and a slotted plate 806 is sleeved on the outside of the drive rod 805. The upper and lower ends of the support spring 802 abut against the lower mold 2 and the worktable 1 respectively, and the worktable 1 is fixedly connected to the slotted plate 806. The specific operation is as follows: During the cold stamping process, the blank to be processed is first placed smoothly into the cavity of the lower die 2. Then, the hydraulic cylinder 4 is activated, and the hydraulic cylinder 4 drives the upper die assembly 7 downward through the lifting seat 5. During the downward movement, the two adjacent upper modules 704 will be pre-closed and molded under the elastic thrust of the compression spring 703, and then simultaneously inserted into the upper opening of the lower die 2. The inner wall of the lower die 2 can form a circumferential limit on the outer side of the upper module 704, effectively preventing the upper module 704 from separating and misaligning outward during the stamping process, ensuring the mold closing accuracy and the stability of the cavity size, and providing a basic condition for high-precision cold stamping. As the lifting seat 5 rises, the upper die assembly 704 will be further lowered and molded. The lowering seat 5 continues to press down, and the stamping load is transferred to the lower die 2 through the blank. This pushes the lower die 2 to compress the support spring 802 and slide smoothly downward along the worktable 1 until the pad 801 is tightly attached to the surface of the worktable 1, achieving a hard limit on the downward movement of the lower die 2. During the synchronous downward movement of the lower die 2, the drive rod 805, guided by the inclined slot of the slot plate 806, drives the pin 804 to be horizontally inserted into the cavity of the lower die 2. This acts as a core to precisely shape the hole position of the blank and provide inner wall support. Subsequently, during the stamping stage, the blank is completely constrained within the closed cavity formed by the lower die 2 and the upper die assembly 7, and is subjected to pressure deformation. Material flow is restricted. The strict limitation of the cavity wall surface effectively suppresses molding flash, dimensional deviations, and shape distortion, significantly improving the molding accuracy and batch production consistency of the product. After molding, when the product needs to be removed from the lower mold 2, the hydraulic cylinder 4 drives the lifting seat 5 to move upward and reset. The upper mold assembly 7 no longer applies pressure to the product. The support spring 802, under its own elastic restoring force, continuously pushes the lower mold 2 upward along the worktable 1 until the stop strip 803 is in contact with the bottom surface of the worktable 1 to complete the upward limit. At the same time, under the reverse limit guidance of the slot hole of the slot plate 806, the drive rod 805 pulls the pin 804 to be smoothly pulled out from the hole of the product, realizing... The synchronous automatic core pulling during the mold opening process eliminates the need for an additional independent core pulling drive device. This avoids the core obstructing the product demolding, simplifies the overall mold structure, and reduces manufacturing costs. Furthermore, as the upper mold assembly 7 moves upward with the lifting seat 5, the product can be automatically pulled out of the cavity of the lower mold 2 by the clamping force between the molded product and the upper mold structure. This facilitates the subsequent automatic unloading process, eliminates the need for manual material handling, effectively shortens the single-process cycle time, and improves the overall production efficiency and operational safety of cold stamping. In addition, the bottom of the pad block 801 and the top of the stop bar 803 are equipped with rubber buffer layers to reduce collision damage.

[0021] Please see Figure 2 , Figure 3 and Figure 6The rotating assembly 6 includes a guide rod 601. The guide rod 601 is fixedly connected to the middle of one end of the support frame 3. A guide groove 602 is provided on the outer side of the guide rod 601. A ball sleeve 603 is fitted on the outer side of the guide rod 601. Balls are installed on the inner side of the ball sleeve 603 and are placed in the guide groove 602 and can roll along the guide groove 602. The guide groove 602 is composed of an upper vertical groove, a spiral groove and a lower vertical groove connected from top to bottom. There are two guide grooves 602. A gear 604 is connected to the outer side of the ball sleeve 603 through a one-way bearing. A gear ring 605 meshes with the outer side of the gear 604. A rotating seat 606 is fixedly connected to the outer side of the gear ring 605. A positioning groove 607 is provided on the outer circumferential surface of the rotating seat 606. The ball sleeve 603 is rotatably connected to the lifting seat 5, and the lifting seat 5 slides with the rotating seat 606. The bottom of the lifting seat 5 is equipped with a ball screw 608. The upper mold assembly 7 includes a lifting lug 701. The bottom of the rotating seat 606 is fixedly connected to the lifting lug 701, and the lifting lug 701 is slidably connected to the inside of the lifting lug 701. A compression spring 703 is sleeved on the outside of the connecting rod 702. One end of the connecting rod 702 is fixedly connected to the upper module 704. The upper module 704 is provided with a protruding post 705. The other end of the connecting rod 702 is equipped with a side plate 706. The lower part of the side plate 706 is rotatably connected to a sliding post 707. The two ends of the compression spring 703 abut against the lifting lug 701 and the upper module 704 respectively. The upper module 704 is slidably connected to the rotating seat 606. A discharge table 9 is provided on one side of the worktable 1. A support plate 10 is provided on the upper part of one side of the worktable 1. Guide blocks 11 are symmetrically arranged on one side of the support plate 10. The specific operation is as follows: After the upper mold assembly 7 pulls the product out of the cavity of the lower mold 2, as the hydraulic cylinder 4 drives the lifting seat 5 to continuously move upward and reset, the ball sleeve 603, which is fixed to the lifting seat 5, will slide upward along the outer wall of the guide rod 601. When the balls inside the ball sleeve 603 travel to the spiral groove section of the guide groove 602, the linear lifting motion is converted into rotational motion by the spiral groove, causing the ball sleeve 603 to rotate circumferentially. This rotation is then driven by the one-way bearing to rotate the gear 604 synchronously. The gear 604 transmits torque to the gear ring 605 through meshing transmission, applying a stable circumferential driving force to the rotating seat 606. At this time, the steel balls of the ball screw 608 are dislodged from the positioning groove 607 by the circumferential thrust of the rotating seat 606, releasing the circumferential force on the rotating seat 606. Locking allows the rotating seat 606 to rotate precisely half a turn under the vertical limiting constraint of the lifting seat 5, automatically moving the upper mold assembly 7 carrying the product directly above the unloading table 9, completing the automatic switching between the stamping station and the unloading station. During this rotation process, the compression spring 703 continuously applies an inward elastic pushing force to the upper module 704, which, together with the limiting effect of the protrusion 705 tightly fitting into the product shaft hole, forms a dual fixing effect of elastic holding and shaft hole locking. This effectively prevents the product from loosening or falling off during the rotation and repositioning process, ensuring the reliability of the rotation process and the product's positional accuracy. When the rotating seat 606 rotates to the target angle, the steel ball of the ball screw 608 will be locked into the corresponding positioning groove 607 under the action of the spring force, thus fixing the rotating seat 606. The circumferential angle of 6 is precisely locked to ensure mold closing alignment accuracy and forming quality. When the lifting seat 5 descends again, driving another set of upper mold components 7 into the cold stamping process, the lifting seat 5 simultaneously drives the ball sleeve 603 to move downward along the guide rod 601. The balls travel in the opposite direction along the spiral groove section of the guide groove 602, causing the ball sleeve 603 to rotate in the opposite direction. At this time, the one-way bearing between the ball sleeve 603 and the gear 604 is in an idle state, and the rotational motion will not be transmitted to the gear 604 and the rotating seat 606. The rotating seat 606 maintains a fixed angle under the positioning of the ball screw 608, thus realizing the time-sharing action logic of automatic upward indexing and unloading, and stable downward stamping forming. No additional independent rotary drive and indexing mechanism are required; it only relies on the hydraulic cylinder 4. A single lifting mechanism can complete the entire process of stamping, indexing, and unloading, significantly simplifying the overall mold structure, shortening the single-process cycle, enabling continuous cold stamping operations, and effectively improving overall processing efficiency. Furthermore, when the upper mold assembly 7, located above the unloading table 9, descends with the lifting seat 5, the corresponding sliding column 707 of this upper mold assembly 7 will first contact the top inclined surface of the guide block 11 and roll down along the inclined surface contour. The lateral force of the inclined surface will push the side plate 706 outward through the sliding column 707, which in turn pulls the upper module 704 through the connecting rod 702, compressing the corresponding compression spring 703, causing the two upper modules 704 to separate from each other, releasing the product from its holding and locking function. The product is automatically unloaded under its own weight, requiring no manual intervention throughout the entire process.The entire unloading process is also precisely timed through pure mechanical linkage, eliminating the need for additional cylinders, motors, or other drive sources and electronic control components, thus reducing overall manufacturing costs and energy consumption.

[0022] Please see Figure 6 and Figure 7 A receiving assembly 12 is connected to one side of the lifting seat 5, and the receiving assembly 12 includes a pressure frame 1201. The pressure frame 1201 is mounted on one side of the lifting seat 5, and a clearance groove 1202 is provided on one side of the middle of the pressure frame 1201. The lower part of the pressure frame 1201 abuts against a pulley seat 1203, and one end of the pulley seat 1203 is connected to a drive shaft 1204. The drive shaft 1204 is rotatably connected to the worktable 1 through a damping bearing, and the end of the drive shaft 1204 is fixedly connected to a receiving assembly. The material frame 1205 is provided, and an elastic plate 1206 is abutted on one side of the receiving frame 1205. The elastic plate 1206 is fixedly connected to the unloading platform 9. A constant force spring 1207 is rotatably connected to one side of the receiving frame 1205. A baffle 1208 is fixedly connected to the end of the constant force spring 1207. A smooth rod 1209 is slidably connected inside the lower end of the baffle 1208. The smooth rod 1209 is fixedly connected to the receiving frame 1205. A buffer head 1210 is installed at the bottom of the smooth rod 1209. The specific operation is as follows: During the unloading operation, when the lifting seat 5 drives the upper mold assembly 7 downward, the pressure frame 1201 fixed to the side of the lifting seat 5 moves downward synchronously. The lower inclined surface of the pressure frame 1201 first abuts against the pulley seat 1203, pushing the pulley seat 1203 to deflect around the axis of the transmission shaft 1204, thereby driving the transmission shaft 1204 to rotate synchronously until the pulley of the pulley seat 1203 is in contact with the vertical side of the pressure frame 1201 and is limited. At this point, the transmission shaft 1204 just drives the receiving frame 1205 to rotate a quarter turn, so that the receiving frame 1205 is in a vertical receiving state and abuts against the lower side of the support plate 10. The support plate 10 completes the hard limit of the rotation angle, ensuring the accuracy and stability of the receiving posture of the receiving frame 1205. When 205 is in a vertical position, the direction of gravity of baffle 1208 is perpendicular to the direction of tension of constant force spring 1207. The weight of baffle 1208 itself will not exert a load on constant force spring 1207 along the axis of smooth rod 1209. Therefore, constant force spring 1207 can stably pull baffle 1208 to slide smoothly along the axis of smooth rod 1209. The rubber layer on the surface of baffle 1208 can buffer the impact of collision when closing and reduce operating noise. At the same time, baffle 1208 forms a closed shield for the side opening of receiving frame 1205, preventing the product from coming out from the side and falling off during subsequent unloading, providing full circumferential receiving protection for the product. When the lifting seat 5 drives the upper mold assembly 7 to continue to descend, the vertically suspended product can be smoothly inserted into receiving frame 1205. Internally, when the upper modules 704 separate under the inclined drive of the guide block 11, the inner wall of the receiving frame 1205 forms a horizontal limiting constraint on the product, preventing the product from moving laterally with the protrusion 705, allowing the protrusion 705 to be smoothly pulled out of the product's shaft hole, completely releasing the engagement relationship with the product. The product then falls into the bottom of the receiving frame 1205 under its own weight. The rubber pad on the inner side of the receiving frame 1205 can buffer the impact of the falling material, avoiding indentations and bumps on the product surface. After the upper module 704 is completely separated from the product, the lifting seat 5 drives the pressure frame 1201 to continue to feed downwards, causing the clearance groove 1202 in the middle of the pressure frame 1201 to move to the corresponding position of the pulley seat 1203. The pressure frame 1201 no longer forms a constraint on the pulley seat 1203. The receiving frame 1205, under the eccentric gravity of itself and the guide rod 1209, begins to rotate in the opposite direction around the drive shaft 1204, forming lateral shielding and limiting constraints. During this process, the damping bearing between the drive shaft 1204 and the worktable 1 provides continuous rotational damping, effectively reducing the rotational speed of the drive shaft 1204 and preventing the receiving frame 1205 from rapidly flipping and causing the product to be thrown out or impacted, making the material transfer process more stable and controllable. When the receiving frame 1205 rotates to the horizontal unloading state, the elastic plate 1206 fixed to the side of the unloading table 9 will form a buffer limit on the side wall of the receiving frame 1205, absorbing the impact energy at the end of the rotation and avoiding mold wear and product vibration caused by rigid collision. At the same time, during the gradual rotation of the receiving frame 1205...As the direction of gravity of the baffle 1208 and the direction of tension of the constant force spring 1207 gradually converge, when the receiving frame 1205 is completely horizontal and the direction of gravity and the direction of spring tension are completely collinear, the self-weight of the baffle 1208 is greater than the tension of the constant force spring 1207. The baffle 1208 then slides vertically downwards along the smooth rod 1209 to open. The buffer head 1210 at the bottom of the smooth rod 1209 can buffer and limit the downward stroke of the baffle 1208, reducing the impact of opening and closing. At this time, the side opening of the receiving frame 1205 is fully open, and the product received inside can smoothly roll onto the unloading platform 9 under its own weight. The entire process is achieved through pure mechanical linkage, realizing automatic receiving, slow material transfer, and smooth unloading without additional drive or manual intervention. This ensures the stability of the unloading process and effectively avoids the impact of unloading impact on product precision, guaranteeing the molding quality and batch size consistency of the finished product.

[0023] In summary, this precision cold stamping die is used as follows: First, the blank to be processed is placed into the cavity of the lower mold 2. The hydraulic cylinder 4 is started, and the upper mold assembly 7 is driven to move downward through the lifting seat 5. During the downward movement, the two adjacent upper modules 704 are pre-closed and molded under the action of the compression spring 703, and are simultaneously inserted into the upper opening of the lower mold 2. The inner wall of the lower mold 2 forms a circumferential limit on the outer side of the upper module 704. Secondly, the lifting seat 5 continues to press down, and the stamping load is transmitted to the lower die 2 through the blank, pushing the lower die 2 to compress the support spring 802 and slide down along the worktable 1 until the rubber buffer layer at the bottom of the pad 801 is in contact with the worktable 1, completing the downward hard limit of the lower die 2. During the downward movement of the lower die 2, the drive rod 805, guided by the inclined slot of the slot plate 806, drives the pin 804 to be horizontally inserted into the cavity of the lower die 2. The blank is pressed and cold stamped in the closed cavity enclosed by the lower die 2 and the upper die assembly 7. Next, after molding is completed, hydraulic cylinder 4 drives lifting seat 5 to move upward and reset, upper mold assembly 7 releases the pressure on the product, support spring 802 pushes lower mold 2 upward until the rubber buffer layer at the top of stop bar 803 is in contact with the bottom surface of worktable 1, completing the upward limit of lower mold 2. Simultaneously, under the reverse guidance of slot hole in slot plate 806, drive rod 805 pulls pin 804 out of product hole, upper mold assembly 7 moves upward with lifting seat 5, and relies on the clamping force between product and upper mold structure to bring product out of lower mold 2 cavity; Then, the lifting seat 5 continues to move upward, and the ball sleeve 603, which is fixed to the lifting seat 5, slides upward along the outer wall of the guide rod 601. When the balls inside the ball sleeve 603 move to the spiral groove section of the guide groove 602, the ball sleeve 603 rotates circumferentially. Through the one-way bearing, it drives the gear 604 to rotate synchronously. Through the gear ring 605, it drives the rotating seat 606 to rotate half a turn, rotating the upper mold assembly 7 carrying the product to the top of the unloading table 9. The steel ball of the ball screw 608 is inserted into the positioning groove 607, completing the circumferential locking of the rotating seat 606. When the lifting seat 5 moves downward again, the ball sleeve 603 moves in the opposite direction along the guide groove 602 and rotates. The one-way bearing between the ball sleeve 603 and the gear 604 is in a free-spinning state. The rotating seat 606 maintains a fixed angle. Synchronously, the upper mold assembly 7 located above the unloading table 9 moves downward with the lifting seat 5. The corresponding sliding column 707 contacts the top inclined surface of the guide block 11 and rolls along the inclined surface. The movement, via the side plate 706 and connecting rod 702, pulls the upper module 704 and compresses the corresponding compression spring 703, causing the two upper modules 704 to separate. Simultaneously, the pressure frame 1201 fixed to the side of the lifting seat 5 moves downwards, pushing the pulley seat 1203 to deflect around the drive shaft 1204 and causing the drive shaft 1204 to rotate until the pulley of the pulley seat 1203 is in contact with the vertical side of the pressure frame 1201. The drive shaft 1204 then drives the receiving frame 1... 205 rotates a quarter turn to a vertical position and abuts against the lower side of the support plate 10 to complete the rotation limit. At this time, the constant force spring 1207 pulls the baffle 1208 to slide along the axial direction of the light rod 1209, forming a shield at the side opening of the receiving frame 1205. The product is inserted into the receiving frame 1205 as the upper mold assembly 7 moves down. After the upper module 704 separates, the protrusion 705 is pulled out from the product shaft hole. The product falls into the bottom of the receiving frame 1205 under its own weight. Finally, after the upper module 704 is completely detached from the product, the lifting seat 5 drives the pressure frame 1201 to continue descending, causing the clearance groove 1202 in the middle of the pressure frame 1201 to move to the corresponding position of the pulley seat 1203. The pressure frame 1201 releases its lateral restraint on the pulley seat 1203. Under the eccentric gravity of itself and the guide rod 1209, the receiving frame 1205 rotates in the opposite direction around the drive shaft 1204. The damping bearing between the drive shaft 1204 and the worktable 1 reduces the rotation speed. When the receiving frame 1205 rotates to the horizontal position... In the current state, the elastic plate 1206 forms a buffer limit on the receiving frame 1205. Simultaneously, the direction of gravity of the baffle 1208 gradually coincides with the direction of tension of the constant force spring 1207. The baffle 1208 overcomes the spring tension and slides down along the light rod 1209 to open. After being buffered and limited by the buffer head 1210, the side opening of the receiving frame 1205 is fully opened. The internal product rolls to the table surface of the unloading table 9 under its own weight, completing a single cold stamping and automatic unloading cycle, which can be continuously processed.

[0024] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A precision cold stamping forming die, characterized in that, The assembly includes a worktable (1) and a core-pulling assembly (8). A lower mold (2) is slidably connected to the middle of the worktable (1), and a support frame (3) is mounted on the top of the worktable (1). A hydraulic cylinder (4) is fixedly connected to the top of the support frame (3), and a lifting seat (5) is connected to the output end of the hydraulic cylinder (4). A rotating assembly (6) is mounted on the bottom of the lifting seat (5), and an upper mold assembly (7) is mounted on the bottom of the rotating assembly (6). The core-pulling assembly (8) is located at the lower part of the lower mold (2). The core-pulling assembly (8) includes a pad (801), the bottom of the lower mold (2) is fixedly connected to the pad (801), and a support spring (802) is sleeved on the outside of the pad (801). A stop bar (803) is arranged on the outside of the support spring (802), and a pin (804) is slidably connected inside the support spring (802). A drive rod (805) is arranged at one end of the pin (804), and a slotted plate (806) is sleeved on the outside of the drive rod (805).

2. The precision cold stamping forming die according to claim 1, characterized in that, The upper and lower ends of the support spring (802) abut against the lower mold (2) and the worktable (1) respectively, and the worktable (1) is fixedly connected to the slotted plate (806).

3. The precision cold stamping forming die according to claim 1, characterized in that, The rotating assembly (6) includes a guide rod (601). The guide rod (601) is fixedly connected to the middle of one end of the stand (3). A guide groove (602) is provided on the outer side of the guide rod (601). A ball sleeve (603) is fitted on the outer side of the guide rod (601). A ball is installed on the inner side of the ball sleeve (603). The ball is placed in the guide groove (602) and can roll along the guide groove (602). A gear (604) is connected to the outer side of the ball sleeve (603) through a one-way bearing. A gear ring (605) meshes with the outer side of the gear (604). A rotating seat (606) is fixedly connected to the outer side of the gear ring (605). A positioning groove (607) is provided on the outer circumferential surface of the rotating seat (606). A ball screw (608) is installed at the bottom of the lifting seat (5).

4. A precision cold stamping forming die according to claim 3, characterized in that, The guide groove (602) is composed of an upper vertical groove, a spiral groove and a lower vertical groove connected from top to bottom, and there are two guide grooves (602).

5. A precision cold stamping forming die according to claim 3, characterized in that, The ball bearing sleeve (603) is rotatably connected to the lifting seat (5), and the lifting seat (5) is slidably connected to the rotating seat (606).

6. A precision cold stamping forming die according to claim 3, characterized in that, The upper mold assembly (7) includes a lifting lug (701). The bottom of the rotating seat (606) is fixedly connected to the lifting lug (701), and a connecting rod (702) is slidably connected inside the lifting lug (701). A compression spring (703) is sleeved on the outside of the connecting rod (702), and an upper module (704) is fixedly connected to one end of the connecting rod (702). A protruding post (705) is provided inside the upper module (704), and a side plate (706) is placed at the other end of the connecting rod (702). A sliding post (707) is rotatably connected to the lower part of the side plate (706).

7. A precision cold stamping forming die according to claim 6, characterized in that, The two ends of the compression spring (703) abut against the lug (701) and the upper module (704) respectively, and the upper module (704) is slidably connected to the rotating seat (606).

8. A precision cold stamping forming die according to claim 1, characterized in that, A discharge platform (9) is provided on one side of the workbench (1), and a support plate (10) is installed on the upper part of one side of the workbench (1), and guide blocks (11) are symmetrically arranged on one side of the support plate (10).

9. A precision cold stamping forming die according to claim 8, characterized in that, The lifting seat (5) is connected to a receiving assembly (12) on one side, and the receiving assembly (12) includes a pressure frame (1201). The lifting seat (5) is provided with a pressure frame (1201) on one side, and a clearance groove (1202) is provided on one side of the middle part of the pressure frame (1201). The lower part of the pressure frame (1201) abuts against a pulley seat (1203), and one end of the pulley seat (1203) is connected to a drive shaft (1204). The drive shaft (1204) is rotatably connected to the worktable (1) through a damping bearing. The end of the drive shaft (1204) is fixedly connected to a receiving frame (1205), and one side of the receiving frame (1205) abuts against an elastic plate (1206). The elastic plate (1206) is fixedly connected to the unloading table (9).

10. A precision cold stamping forming die according to claim 9, characterized in that, A constant force spring (1207) is rotatably connected to one side of the receiving frame (1205), and a baffle (1208) is fixedly connected to the end of the constant force spring (1207). A light rod (1209) is slidably connected to the lower end of the baffle (1208), and the light rod (1209) is fixedly connected to the receiving frame (1205). A buffer head (1210) is installed at the bottom of the light rod (1209).

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