Automobile terminal production forming equipment

Abstract

The application belongs to the technical field of electrical component production, and discloses a production forming equipment for automobile wiring terminals, which comprises a punching die set, wherein the punching die set comprises a movable die and a fixed die; the movable die comprises a movable base, a center punch is arranged on the movable base, an adjusting punch is arranged on the periphery of the center punch in a sliding mode, and the adjusting punch has switchable working and storage states along the axial direction of the center punch; the fixed die comprises a fixed base, a forming concave hole corresponding to the adjusting punch is formed in the fixed base, and a bending lower die is arranged in the forming concave hole. The punching and the anti-rebound bending of waste materials are integrated in the same station and are continuously completed in a single stroke, so that the problems of die jamming and product bruising caused by waste material rebound in the punching scene of thin material and small holes are fundamentally solved.

Description

Technical Field

[0001] This invention belongs to the field of electrical component manufacturing technology, specifically relating to a molding equipment for automotive terminal blocks. Background Technology

[0002] Automotive terminal blocks are typically formed from metal strips through a progressive die. The forming process includes punching, trimming, bending, end sealing, and crimping. The punching process creates positioning holes, snap-fit ​​holes, or wire-passing holes on the terminal body, while the bending process folds the terminal body into a specific spatial configuration to meet assembly requirements. In existing technologies, these processes are usually distributed across different stations of the progressive die. After material separation at the punching station, waste material is discharged downwards through the die's discharge channel by gravity, while burrs are removed in subsequent processes or post-processing.

[0003] However, as automotive electronic systems become smaller and lighter, the thickness of terminal materials is continuously decreasing, and the corresponding punching diameter is also shrinking. In such thin-material, small-hole punching scenarios, the scrap size is extremely small and its weight is extremely light. At the moment of punching separation, the frictional force and elastic recovery force between the scrap and the die wall are far greater than the scrap's own weight. This causes the scrap to be unable to be smoothly discharged by gravity, but instead to be carried out of the die or bounced back to the strip surface during the punch's return stroke, resulting in scrap springback. The springback scrap is carried into the next station during subsequent feeding, causing die jamming, product damage, or even production line stoppage. Meanwhile, during the punching of thin materials with small holes, the gap between the punch and die is relatively large compared to the material thickness. As a result, the crack propagation path is unstable during the fracture separation process, and it is difficult to form a complete bright band on the fracture surface. This results in burrs with a height of 0.02mm to 0.05mm remaining on the inner wall of the hole. When the terminal is plugged into the mating terminal, the burrs will scratch the plating of the mating terminal, causing increased contact resistance and unstable signal transmission. In severe cases, it can lead to connector failure. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an automotive terminal block manufacturing and molding equipment to solve the problems existing in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is an automotive terminal block manufacturing and forming equipment, including a punching module, wherein the punching module includes a moving die and a fixed die; the moving die includes a moving base, on which a central punch is disposed, and an adjusting block is slidably disposed around the central punch, the adjusting block having a switchable working state and a retracted state along the axial direction of the central punch; in the working state, the bottom end of the adjusting block is lower than the bottom end of the central punch in the vertical direction; in the retracted state, the bottom end of the adjusting block is higher than the bottom end of the central punch in the vertical direction; the fixed die includes a fixed base, on which an opening is formed for the adjusting block. The adjusting block has a corresponding forming concave hole, and a bending die is provided in the forming concave hole. When the die is closed, the adjusting block first switches to the working state, and the bottom end of the adjusting block is lower than the bottom end of the center punch, which contacts the strip first and cooperates with the forming concave hole to complete the punching separation, and the waste material falls into the forming concave hole. Subsequently, the adjusting block switches to the storage state, and the bottom end of the adjusting block rises above the bottom end of the center punch, making way for the axial passage of the center punch. The center punch continues to descend with the moving die, enters the forming concave hole and cooperates with the bending die, applying pressure to the waste material that has fallen into the forming concave hole to produce plastic deformation and prevent the waste material from springing back.

[0006] Preferably, a linear control component is provided between the adjusting punch and the center punch, the linear control component is mounted on the center punch, and the output end of the linear control component is connected to the adjusting punch.

[0007] Furthermore, the lower bending die includes bending members symmetrically arranged radially on the fixed base along the forming concave hole and a control member located on at least one side of the fixed base. A transmission member is horizontally slidably arranged on the fixed base between the control member and the bending members. After the central punch applies pressure to the waste material, it drives the control member to move. The control member drives the bending members on both sides to synchronously close towards the center of the forming concave hole in the horizontal direction through the transmission member, thereby bending and deforming the waste material. After bending is completed, the bending members synchronously unfold outward in the horizontal direction, releasing the bent waste material so that it falls and is discharged.

[0008] Furthermore, the transmission component includes a piston chamber formed within the fixed base and transmission blocks located at both ends of the piston chamber, with the piston blocks at both ends respectively connected to the control component and the bending component.

[0009] Furthermore, an elastic reset member is provided between the transmission component and the fixed base. Under the preload of the elastic reset member, the bending component tends to close towards the center of the forming concave hole. A driving component is provided on the same side of the moving base as the control component. Guide slopes are provided on the opposing surfaces of the driving component and the control component. When the mold is closed, the moving mold moves downward, and the guide slopes of the driving component and the control component fit together, driving the control component to move through the inclined plane driving action.

[0010] Preferably, a pressure plate is slidably disposed on the moving base, the pressure plate being located around the center punch and the adjusting punch; when the mold is closed, the pressure plate contacts the strip before the adjusting punch and presses the strip onto the fixed base, and then the adjusting punch and the center punch pass through the pressure plate in sequence to complete the punching and waste bending operations.

[0011] Preferably, the end of the adjusting punch block facing the fixed base is provided with a forward punching cutter, and the end of the adjusting punch block facing the moving base is provided with a reverse deburring cutter.

[0012] Furthermore, the forming concave hole includes, from top to bottom, a cutting edge section, a bending section, and a blanking section; the cutting edge section is a straight-walled section with a punching cutting edge on its inner wall. When the adjusting punch is in the working state, the forward punching cutter extends into the cutting edge section to complete the punching separation; the bending section is located below the cutting edge section, and the bending die is provided in the bending section. The central punch enters the bending section to apply pressure to the waste material; the blanking section is located below the bending section, and the diameter of the blanking section is larger than the diameter of the bending section, used to guide the bent waste material downwards for discharge.

[0013] Furthermore, the outer wall of the central punch is provided with a guide groove along the axial direction, and the inner wall of the adjusting punch is provided with a guide rib that slides in cooperation with the guide groove; the adjusting punch slides along the guide groove through the guide rib, thereby realizing the axial switching of the adjusting punch between the working state and the storage state.

[0014] The main technical effects of this invention are reflected in the following aspects: By integrating punching and scrap anti-springback bending functions into a single stroke at the same station, the problem of scrap springback causing mold jamming and product damage in thin-material, small-hole punching scenarios is fundamentally solved. Specifically, the adjusting punch first contacts the strip to complete the punching separation in the working state. The scrap falls into the bending section through the forming concave hole under the push of the forward punching cutter. Then, the adjusting punch switches to the storage state to make way for the axial channel of the center punch. The center punch then follows and enters the forming concave hole, applying axial pressure to the scrap that has fallen into the concave hole and causing plastic deformation of the scrap through the bending die to form a flange structure. The entire punching and scrap bending process is seamlessly connected in the same stroke. The scrap is bent and locked from the moment of separation, and the springback time window is close to zero. Compared to existing technologies where the punching station and waste disposal station are separated, and waste is discharged through the die discharge channel by its own gravity, while thin-walled waste with small holes cannot be discharged smoothly due to insufficient weight, this solution eliminates the time gap and spatial distance between the separation of waste from punching and the bending lock. This allows the waste to complete plastic deformation and lock before it shows any signs of springback, avoiding the risk of the waste being carried out of the die by the punch or springing back onto the surface of the strip. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention; Figure 2 for Figure 1 Structural diagram of the moving mold; Figure 3 for Figure 1 Structural diagram of the intermediate mold; Figure 4 for Figure 2 Structural diagram of the lower die for intermediate bending; In the diagram: 1. Moving die; 11. Moving base; 12. Center punch; 13. Adjusting punch; 2. Fixed die; 21. Fixed base; 22. Forming recess; 23. Lower bending die; 231. Bending component; 232. Control component; 233. Transmission component; 234. Drive component; 235. Guide slope. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master. In the embodiments, it should be understood that the terms "middle," "upper," "lower," "top," "right side," "left end," "above," "back," "center," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection commonly used in the prior art, etc., and therefore will not be described in detail in this embodiment.

[0017] This embodiment provides a molding equipment for producing automotive terminal blocks. Its core design concept is to integrate three functions—punching, scrap anti-springback bending, and hole deburring—into a single stroke at the same station. This fundamentally solves the technical problem that the two problems of scrap springback and hole burrs are coupled in the scenario of thin material and small hole punching, and that a single process cannot take care of both simultaneously.

[0018] The equipment includes a punching module, which consists of a moving die 1 and a fixed die 2. The moving die 1 reciprocates vertically under the drive of a press, while the fixed die 2 is fixedly mounted on the worktable and remains stationary. When the moving die 1 and the fixed die 2 close together, the punching process of the material strip is completed. The moving die 1 includes a moving base 11, and a central punch 12 is fixedly mounted at the center of the moving base 11. An adjusting block 13 is slidably sleeved around the central punch 12. The adjusting block 13 has a switchable working state and a retracted state along the axial direction of the central punch 12. In the working state, the bottom end of the adjusting block 13 is lower than the bottom end of the central punch 12 in the vertical direction. At this time, the adjusting block 13 contacts the material strip before the central punch 12 and independently completes the punching and separation action. In the retracted state, the bottom end of the adjusting block 13 is higher than the bottom end of the central punch 12 in the vertical direction. At this time, the adjusting block 13 completely clears the axial channel in front of the central punch 12 to make way for the subsequent downward movement of the central punch 12. The fixed mold 2 includes a fixed base 21, on which a forming recess 22 corresponding to the adjusting punch 13 is provided. A bending lower die 23 is disposed within the forming recess 22. During mold closing, the adjusting punch 13 first switches to the working state, with its lowest point lower than the lowest point of the central punch 12, making initial contact with the strip material and cooperating with the forming recess 22 to complete punching separation, with the scrap falling into the forming recess 22. Subsequently, the adjusting punch 13 switches to the retracted state, with its lowest point rising above the lowest point of the central punch 12, providing an axial passage for the central punch 12. The central punch 12 continues to descend with the moving mold 1, entering the forming recess 22 and cooperating with the bending lower die 23, applying pressure to the scrap material that has fallen into the forming recess 22 to produce plastic deformation and prevent the scrap material from springing back. In the above structure, the adjusting punch 13 and the center punch 12 adopt a coaxial nested layout. By dynamically switching the axial position, the two functions of punching and scrap bending are separated in the same station. There is no need to add an independent station, which fundamentally eliminates the time gap between the separation of scrap from punching and bending locking, making the springback time window approach zero.

[0019] Regarding the position adjustment of the adjusting block 13 on the central punch 12: A linear control component is provided between the adjusting block 13 and the central punch 12. The linear control component is mounted on the central punch 12, and its output end is connected to the adjusting block 13. It is used to drive the adjusting block 13 to slide along the axial direction of the central punch 12 to switch between the working state and the storage state. The linear control component can be either a cylinder or an electromagnetic actuator. When using a cylinder or an electromagnetic actuator, the switching timing and stroke can be precisely controlled by a program, which is suitable for high-speed continuous stamping scenarios. The linear control component ensures that the state switching of the adjusting block 13 does not depend on an external independent drive source, but is integrated inside the central punch 12. It has a compact structure and rapid response, and the switching timing is precisely synchronized with the stamping stroke.

[0020] Preferably, the bending die 23 includes bending members 231 symmetrically arranged radially on a fixed base 21 along the forming recess 22, and a control member 232 located on at least one side of the fixed base 21. A transmission member 233 is horizontally slidably arranged on the fixed base 21 between the control member 232 and the bending members 231. After the center punch 12 applies pressure to the waste material, it drives the control member 232 to move. The control member 232 drives the bending members 231 on both sides to synchronously close towards the center of the forming recess 22 in the horizontal direction through the transmission member 233, thus bending and deforming the waste material. After bending, the bending members 231 synchronously unfold outward in the horizontal direction, releasing the bent waste material so that it falls out. The bending members 231 are arranged radially symmetrically to ensure that the waste material is subjected to uniform radial extrusion force in the bending section, avoiding uneven force causing the waste material to warp or get stuck on one side. The control component 232 is located to the side of the fixed base 21. It transmits the horizontal driving force to the bending component 231 through the transmission component 233, thereby achieving consistency between the driving force input direction and the movement direction of the bending component 231 and reducing energy loss in the transmission process. A pressure plate is also slidably mounted on the moving base 11. The pressure plate is located around the center punch 12 and the adjusting punch 13.

[0021] Furthermore, the pressure plate is elastically connected to the lower part of the moving base 11 via a pressure spring, and the pressure plate can float vertically relative to the moving base 11. The bottom surface of the pressure plate is a flat pressure surface, with clearance holes for the center punch 12 and the adjusting punch 13 to pass through. During mold closing, the pressure plate contacts the strip before the adjusting punch 13 and presses the strip onto the fixed base 21. Subsequently, the adjusting punch 13 and the center punch 12 pass through the pressure plate in sequence to complete the punching and scrap bending operations. The purpose of the pressure plate design is to press the strip onto the fixed base 21 before the punching action occurs, preventing thin materials from warping or shifting due to elastic recovery caused by material separation during punching, thus ensuring the accuracy of the punching position. The spring force of the pressure spring is selected according to the material and thickness of the strip to ensure that the pressure force is sufficient to overcome the warping tendency of the strip during punching, while not leaving indentations on the strip surface.

[0022] Furthermore, an elastic reset member is provided between the transmission component 233 and the fixed base 21. Under the preload of the elastic reset member, the bending component 231 tends to close towards the center of the forming concave hole 22. The elastic reset member can be a compression spring or a disc spring, and its preload is determined according to the extrusion force required for bending the waste material, ensuring that the bending component 231 remains closed when there is no external driving force, and can be pushed open to the unfolded position when subjected to sufficient external driving force. On the moving base 11, a driving component 234 is provided on the side corresponding to the control component 232. The driving component 234 is a wedge block fixedly mounted on the moving base 11, with the wedge surface facing downwards. The control component 232 is provided with a driven inclined surface that cooperates with the wedge surface, and guide slopes 235 are provided on the opposing surfaces of the driving component 234 and the control component 232. During mold closing, the moving mold 1 descends, and the wedge surface of the wedge block slides along the driven inclined surface of the control component 232. The wedge action generates a horizontal force, propelling the control component 232 horizontally. The design of the drive component 234 and the guide slope 235 converts the vertical movement of the moving mold 1 into the horizontal movement of the control component 232. This, in turn, drives the bending component 231 through the transmission component 233, achieving mechanical linkage between the various actions without requiring an additional independent drive source. During the descent of the moving mold 1, the drive component 234 descends synchronously with it. The wedge surface of the wedge block gradually penetrates deeper into the driven inclined surface of the control component 232, gradually increasing the horizontal force. This pushes the control component 232 outward, overcoming the preload of the elastic reset component. The force transmission medium within the piston chamber then drives the bending component 231 to unfold outward synchronously. When the mold opens, the moving mold 1 moves upward, and the wedge block moves upward and disengages from the control component 232. The control component 232 is reset under the action of the elastic reset component, which drives the bending component 231 to close back to the initial position, ready for the next punching cycle.

[0023] It is worth noting that the transmission component 233 includes a piston chamber formed within the fixed base 21 and piston blocks located at both ends of the piston chamber. The piston blocks at both ends are respectively connected to the control component 232 and the bending component 231. In the actual production of automotive terminal blocks, the layout of the punching station is often constrained by the complex configuration of the terminal body. When the holes to be punched on the terminal body are located within the obstruction range of the bending area, the tapering area, or other protruding structures, the spatial path between the control component 232 and the bending component 231 is not a simple straight connection, but rather involves structural interference or path bending. In such complex punching scenarios, if a traditional rigid transmission rod is used to directly transmit the driving force, the transmission rod needs to be arranged around obstacles, which not only occupies a large amount of mold space, but also the transmission rod with an excessively large slenderness ratio is prone to buckling instability under high pressure conditions, and the reliability of force transmission cannot be guaranteed. This embodiment adopts a hydraulic transmission method of piston chamber and piston block, precisely to solve the technical problem that the rigid transmission rod cannot directly transmit force. The piston chamber can be arranged along any path inside the fixed base 21, without being restricted by a straight channel, and can bypass structural interference areas to transmit the driving force of the control component 232 to the bending component 231. The piston chamber is filled with hydraulic oil or compressed gas as the force transmission medium. When the control component 232 is displaced by an external driving force, the force transmission medium in the piston chamber uniformly transmits the pressure to the piston block at the other end, driving the bending component 231 to move horizontally. Because the force transmission medium is a fluid, its pressure transmission is not limited by the path shape. Even if the piston chamber's layout path has bends or branches, the driving force can still be transmitted to the bending component 231 without loss. The sealing structure of the piston chamber ensures that the force transmission medium does not leak during operation, guaranteeing transmission accuracy and response speed. The clearance between the piston block and the piston chamber is controlled between 0.01mm and 0.02mm, ensuring smooth sliding of the piston block and preventing leakage of the force transmission medium under high pressure. In addition, by adjusting the area ratio of the piston blocks at both ends of the piston chamber, the transmission force can be amplified or reduced, which makes it easy to flexibly adjust the transmission ratio according to the extrusion force required for bending the waste material, and adapt to the bending requirements of different material thicknesses and different waste material sizes.

[0024] Preferably, the adjusting block 13 is equipped with a forward cutting blade at the end facing the fixed base 21 and a reverse deburring blade at the end facing the moving base 11. In operation, the adjusting block 13 moves downwards, and the forward cutting blade extends into the forming recess 22 to complete forward cutting and separation. Subsequently, the adjusting block 13 moves upwards to switch to a retracted state, and the reverse deburring blade moves upwards with the adjusting block 13, engaging with the opening of the forming recess 22 to reverse-shear the burrs at the opening. The forward cutting blade and the reverse deburring blade are located at opposite ends of the adjusting block 13 and function at different stages of the adjusting block 13's movement. The forward cutting blade completes material separation when the adjusting block 13 moves downwards, at which point burrs are generated on one side of the opening. After punching, during the upward return stroke of the adjusting punch block 13, the reverse deburring cutter removes the burrs at the hole opening by reverse shearing, with the cutting depth controlled between 0.005mm and 0.01mm, removing only the burr layer without enlarging the hole diameter. In a single downward and upward stroke, the adjusting punch block 13 simultaneously completes both forward punching and reverse deburring functions, eliminating the need for a separate deburring station and perfectly complementing the single-station integrated solution.

[0025] The forming concave hole 22 comprises three functional areas from top to bottom: a cutting edge section, a bending section, and a blanking section. The cutting edge section, located at the top, is a straight-walled section with a punching cutting edge on its inner wall. When the adjusting punch block 13 is in operation, the forward punching cutter extends into the cutting edge section to complete the punching separation. The inner wall of the cutting edge section has a micro-chamfer, which helps guide the waste material smoothly into the concave hole and reduces wear on the cutting edge section. The bending section is located below the cutting edge section and contains a bending die 23. The central punch 12 enters the bending section to apply pressure to the waste material. At least one pair of symmetrical inclined grooves are formed on the inner wall of the bending section. The groove depth is 0.05mm to 0.15mm, and the grooves extend inclined downwards and inwards from top to bottom, with the inclination direction consistent with the waste material discharge direction. The inclined groove functions in conjunction with the bending component 231 of the lower bending die 23 to apply radial extrusion force to the waste material passing through the bending section, causing plastic deformation and forming a flange structure, thereby achieving mechanical interlocking of the waste material and preventing springback. The blanking section is located below the bending section, and its aperture is larger than that of the bending section, used to guide the bent waste material downwards. The aperture of the blanking section is more than 50% larger than the maximum envelope size of the waste material to ensure that the bent waste material can pass smoothly without jamming. On the fixed base 21, a negative pressure suction port is provided on one side of the forming concave hole 22. The negative pressure suction port is connected to an external negative pressure source, and its diameter is 2mm to 3mm. A metal filter screen is provided at its inlet end, and the mesh size of the metal filter screen is no larger than 0.5mm. The negative pressure suction port is designed to remove metal chips generated by the reverse deburring cutter in real time when the adjusting punch 13 switches to the storage state, preventing the chips from accumulating in the forming recess 22 and affecting the subsequent stamping accuracy. The three-section structure clearly separates the three functional areas of punching, bending, and waste removal. The functional parameters of each section can be optimized independently without interference, improving the versatility and maintainability of the mold.

[0026] Finally, a guide groove is formed axially on the outer wall of the central punch 12, and a guide rib is provided on the inner wall of the adjusting punch 13 to slide in cooperation with the guide groove. The adjusting punch 13 slides along the guide groove via the guide rib, realizing the axial switching of the adjusting punch 13 between the working state and the storage state. The cooperation between the guide groove and the guide rib ensures the accuracy of the axial sliding of the adjusting punch 13 and prevents the adjusting punch 13 from circumferentially deflecting during the sliding process, ensuring that the adjusting punch 13 and the forming concave hole 22 are coaxially aligned in the working state. The length of the guide groove determines the switching stroke of the adjusting punch 13, and its length is determined according to the axial displacement between the working state and the storage state. The clearance between the guide rib and the guide groove is controlled between 0.005mm and 0.01mm to ensure smooth sliding and prevent radial shaking of the adjusting punch 13 during high-speed switching. A guide assembly is also provided between the moving mold 1 and the fixed mold 2. The guide assembly includes a guide post fixedly mounted on the fixed base 21 and a guide sleeve slidably mounted on the guide post. The guide sleeve is fixedly mounted on the moving base 11. The clearance between the guide post and the guide sleeve is 0.01mm to 0.03mm to ensure the alignment accuracy of the moving mold 1 and the fixed mold 2 when they are closed. The guide assembly ensures that the moving mold 1 can be accurately aligned with the fixed mold 2 during each downward movement, keeping the coaxiality deviation between the center punch 12 and the forming concave hole 22 within a very small range. This is crucial for the positional accuracy of small-diameter punching.

[0027] The following describes the complete working process of the device.

[0028] In the initial state, the moving die 1 is at the top dead center position. The adjusting punch 13 is in operation under the spring force of the linear control component. The bottom of the adjusting punch 13 is lower than the bottom of the center punch 12 in the vertical direction, and the forward cutting blade extends below the bottom of the center punch 12. The pressure plate is in a naturally drooping state under the action of the pressure spring, and its bottom surface is lower than the bottom of the forward cutting blade. The bending component 231 of the bending die 23 is in a closed state under the preload of the elastic reset component, and the end of the bending component 231 extends into the inclined groove of the bending section of the forming concave hole 22. The strip is fed by the feeder to the top of the fixed base 21, ready to enter the die closing and blanking stage.

[0029] When the correct operating condition is reached, the press drives the moving die 1 downwards. First, the bottom surface of the pressure plate contacts the strip and presses it firmly against the top surface of the fixed base 21. As the moving die 1 continues to descend, the pressure spring is compressed, and the strip is continuously pressed to ensure that the strip does not lift or shift during the punching process. Subsequently, the forward punching cutter on the adjusting block 13 passes through the clearance hole on the pressure plate, contacts the strip first, and extends into the cutting edge section of the forming recess 22, cooperating with the punching cutting edge of the cutting edge section to complete the punching separation. The waste material generated by the punching separation is pushed by the forward punching cutter and enters the bending section of the forming recess 22 through the cutting edge section. At this time, since the adjusting block 13 is in the working state, its bottom end is lower than the bottom end of the center punch 12, and the center punch 12 has not yet contacted the strip. The punching action is completed independently by the adjusting block 13. After punching is completed, the linear control component receives a control signal, overcomes the elastic force of the spring, and drives the adjusting punch block 13 to slide upward along the guide groove, switching to the retracted state. In the retracted state, the bottom of the adjusting punch block 13 rises above the bottom of the center punch 12, and the adjusting punch block 13 as a whole clears the axial channel in front of the center punch 12, making way for the subsequent downward movement of the center punch 12. At the same time, during the upward movement of the adjusting punch block 13, the reverse deburring cutter at its top moves upward with the adjusting punch block 13, and cooperates with the edge of the opening of the forming concave hole 22 to reverse-shear the burrs on the inner wall of the opening. The cutting depth of the reverse deburring cutter is controlled between 0.005mm and 0.01mm, removing only the burr layer without enlarging the hole diameter. The metal chips generated by shearing are removed in real time by the negative pressure suction port and will not accumulate in the forming concave hole 22. After the adjusting punch block 13 is retracted, the center punch 12 continues to move downward with the moving die 1 and enters the bending section of the forming concave hole 22. The bottom end face of the center punch 12 is flat, and its outer diameter is smaller than the inner diameter of the forming concave hole 22. After the center punch 12 enters the bending section, its bottom end face contacts the top surface of the scrap material that has fallen into the bending section, and the scrap material is pressed into the lower bending die 23 by axial pressure. While the center punch 12 applies pressure to the scrap material, the continuous downward movement of the moving die 1 drives the driving component 234, i.e., the wedge block, to move downward synchronously. The wedge surface of the wedge block slides along the driven inclined surface of the control component 232, and a horizontal component force is generated by the wedge action of the inclined surface, which pushes the control component 232 to move in the horizontal direction. The control component 232 transmits the displacement to the piston blocks at both ends through the force transmission medium in the piston chamber, which drives the bending components 231 on both sides to overcome the preload of the elastic reset component and unfold synchronously outward in the horizontal direction. However, in this embodiment, the unfolding action of the bending component 231 occurs after the scrap material has been pressed into the inclined groove by the center punch 12. Specifically, the center punch 12 first presses the waste material into the inclined groove of the bending section. Under the constraint of the inclined groove, the waste material undergoes plastic deformation to form a flange structure, completing the bending and locking. Subsequently, the wedge block continues to descend, driving the bending component 231 to unfold outward through the control component 232 and the transmission component 233, releasing the clamping of the waste material, so that the bent waste material is discharged downward through the dropping section under its own weight and the pushing of the center punch 12.Because the diameter of the blanking section is larger than that of the bending section, the bent scrap can smoothly pass through the blanking section into the scrap collection box below the mold without jamming. When the mold opens, the moving mold 1 moves upward, and the wedge block moves upward and disengages from the control component 232. The control component 232 is reset under the action of the elastic reset component, which drives the bending component 231 to close back to the initial position, ready for the next punching cycle.

[0030] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A molding equipment for producing automotive terminal blocks, characterized in that, Includes a punching module, which comprises a moving die and a fixed die; The moving mold includes a moving base, on which a central punch is disposed. An adjusting punch block is slidably disposed around the periphery of the central punch. The adjusting punch block has a switchable working state and a retracted state along the axial direction of the central punch. In the working state, the bottom end of the adjusting punch block is lower than the bottom end of the central punch in the vertical direction. In the retracted state, the bottom end of the adjusting punch block is higher than the bottom end of the central punch in the vertical direction. The fixed mold includes a fixed base, on which a forming recess corresponding to the adjusting punch is provided, and a bending lower mold is provided in the forming recess; During mold closing, the adjusting punch first switches to the operating state, with its bottom end lower than the bottom end of the central punch, making initial contact with the strip material and engaging with the forming recess to complete the punching separation, allowing the waste material to fall into the forming recess. Subsequently, the adjusting punch switches to the storage state, with its bottom end rising above the bottom end of the central punch, providing an axial passage for the central punch. The central punch continues to descend with the moving mold, entering the forming recess and engaging with the lower bending die, applying pressure to the waste material that has fallen into the forming recess to induce plastic deformation and prevent the waste material from springing back.

2. The automotive terminal block manufacturing equipment as described in claim 1, characterized in that, A linear control component is provided between the adjusting punch and the center punch. The linear control component is mounted on the center punch, and its output end is connected to the adjusting punch.

3. The automotive terminal block manufacturing equipment as described in claim 1, characterized in that, The bending die includes a bending member symmetrically arranged on the fixed base along the radial direction of the forming concave hole and a control member located on at least one side of the fixed base. A transmission member is horizontally slidably arranged on the fixed base between the control member and the bending member. After the central punch applies pressure to the waste material, it drives the control component to move. The control component, through the transmission component, drives the bending components on both sides to move synchronously towards the center of the forming concave hole in the horizontal direction, bending and deforming the waste material. After bending, the bending components move synchronously outward in the horizontal direction, releasing the bent waste material so that it falls and is discharged.

4. The automotive terminal block manufacturing equipment as described in claim 3, characterized in that, The transmission component includes a piston chamber formed within the fixed base and transmission blocks located at both ends of the piston chamber. The piston blocks at both ends are respectively connected to the control component and the bending component.

5. The automotive terminal block manufacturing equipment as described in claim 4, characterized in that, An elastic reset member is provided between the transmission component and the fixed base. Under the preload of the elastic reset member, the bending component tends to close towards the center of the formed concave hole. A driving component is provided on the same side as the control component on the moving base, and guide slopes are provided on the opposite surfaces of the driving component and the control component. When the mold is closed, the moving mold moves downward, and the guide slope of the driving component and the guide slope of the control component are in contact with each other, and the control component is driven by the inclined plane.

6. The automotive terminal block manufacturing equipment as described in claim 1, characterized in that, A pressure plate is also slidably disposed on the moving base, and the pressure plate is located around the central punch and the adjusting punch; When the mold is closed, the pressure plate contacts the strip before the adjusting punch and presses the strip onto the fixed base. Then the adjusting punch and the center punch pass through the pressure plate in sequence to complete the punching and waste bending operations.

7. The automotive terminal block manufacturing and forming equipment as described in any one of claims 1 to 6, characterized in that, The adjusting punch block is provided with a forward cutting blade at one end facing the fixed base, and a reverse deburring blade at the other end facing the moving base.

8. The automotive terminal block manufacturing equipment as described in claim 7, characterized in that, The forming concave hole includes, from top to bottom, a cutting edge section, a bending section, and a blanking section; The cutting edge section is a straight wall section, and its inner wall is provided with a punching cutting edge. When the adjusting punch block is in the working state, the forward punching cutter extends into the cutting edge section to complete the punching separation. The bending section is located below the cutting edge section, and the bending lower die is provided in the bending section. The center punch enters the bending section to apply pressure to the waste material. The material discharge section is located below the bending section, and the diameter of the material discharge section is larger than that of the bending section, which is used to guide the waste material after bending to be discharged downward.

9. The automotive terminal block manufacturing equipment as described in claim 7, characterized in that, The outer wall of the central punch is provided with a guide groove along the axial direction, and the inner wall of the adjusting punch is provided with a guide rib that slides in cooperation with the guide groove. The adjusting block slides along the guide groove via the guide rib, thereby enabling the adjusting block to switch axially between the working state and the storage state.

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