Integrated efficient forming and bottom cutting die for retainer

Abstract

The utility model discloses an integrated efficient forming and bottom cutting die for a retainer. The integrated efficient forming and bottom cutting die comprises a stretching female die assembly, a stretching male die assembly, a blank holder assembly and a punching male die assembly. A through discharging channel is formed in the center of the stretching male die assembly, the punching male die assembly is embedded in the center of the stretching female die assembly, the size of a punching male die is matched with that of the discharging channel, the retainer forming process and the bottom cutting process are integrated, the transfer frequency of semi-finished products between dies is reduced, and therefore the labor intensity is greatly reduced, and the production efficiency is improved. Manual operation links are reduced, the smoothness and efficiency of the whole production line are improved, the requirements for manual carrying and semi-finished product positioning are reduced, workers only need to be responsible for feeding and discharging and monitoring the production process, the labor intensity is remarkably reduced, the purchase and maintenance cost of multiple sets of molds is reduced, and due to the improvement of the production efficiency and the reduction of the labor cost, the production efficiency is greatly improved. And the overall production cost is optimized.

Description

Technical Field

[0001] This application belongs to the field of cage processing equipment, and particularly relates to an integrally efficient forming and bottom-cutting die for a cage. Background Art

[0002] In the stamping manufacturing process of a bearing cage, the first step is the blanking process. In this process, the steel plate raw material is precisely cut into a standard circular blank by blanking technology, which serves as the base material for subsequent processing. Immediately following is the forming stage. In this stage, using a specific forming die and under the action of a press, the circular blank is shaped into a semi-finished product structure with a bowl-shaped contour. This process requires precise die design to ensure the accuracy and consistency of the shape. Subsequently, it enters the bottom-cutting process. This step involves using another set of special bottom-cutting dies. With the assistance of a press, the excess metal material at the inner diameter of the formed cage is precisely removed to form the final required inner diameter size.

[0003] However, the current manufacturing process that involves multiple steps and multiple dies has significant drawbacks: First, the operation is complex, requiring manual transfer of semi-finished products between two sets of dies frequently, increasing labor intensity and operation time. Second, the efficiency is low. Due to the connection and waiting between processes, the overall production efficiency is limited. Third, the difficulty of precision control increases. Multiple transfers and positioning may lead to cumulative errors, affecting the final precision of the product. Finally, the procurement and maintenance of multiple sets of dies also increase production costs. Therefore, exploring more efficient and precise stamping manufacturing technology and automated production lines for bearing cages has become an important direction for the development of the industry. Thus, the existing technology needs to be further improved and enhanced. Summary of the Utility Model

[0004] The utility model provides an integrally efficient forming and bottom-cutting die for a cage, integrating the cage forming and bottom-cutting processes, reducing the number of transfers of semi-finished products between dies, thereby significantly reducing labor intensity and improving production efficiency.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An integrally efficient forming and bottom-cutting die for a cage includes a drawing female die assembly, a drawing male die assembly, a blank holder assembly, and a punching male die assembly;

[0007] A through discharging channel is provided at the center of the drawing male die assembly. The blank holder assembly is arranged around it. The blank holder assembly has an initial blank holding position and a forming blank holding position. At the initial blank holding position, the upper surface of the blank holder assembly is flush with the top surface of the drawing male die assembly, jointly forming a horizontal positioning surface for placing the blank. When the drawing female die moves downward, it pushes the blank holder assembly from the initial blank holding position to the forming blank holding position. The blank is extruded between the drawing male die and the drawing female die to complete the stretching and forming of the blank;

[0008] The punching punch assembly is embedded in the center of the stretching die assembly. The size of the punching punch is adapted to the blanking channel. The stretching die assembly and the punching punch assembly move synchronously. When the blank holder assembly reaches the forming blank holding position, the punching punch assembly penetrates the center of the formed blank to complete the operation of punching the bottom hole.

[0009] In the above structure, by integrating the stretching forming and punching and bottom cutting functions in the same set of molds, the stretching forming and punching and bottom cutting operations of the cage are continuously completed in the same mold, without the need to transfer semi-finished products between multiple molds. Therefore, the waiting time and transfer time in the production process are greatly reduced, the manual operation links are reduced, the smoothness and efficiency of the overall production line are improved, the need for manual handling and positioning of semi-finished products is reduced, and the workers only need to be responsible for loading and unloading and monitoring the production process, significantly reducing the labor intensity, reducing the procurement and maintenance costs of multiple sets of molds. Due to the improvement of production efficiency and the reduction of labor costs, the overall production cost is optimized.

[0010] In a preferred implementation manner, the stretching punch assembly includes a lower clamping plate and a lower die base. The lower clamping plate is located above the lower die base and is used to fix and support the stretching punch. The lower clamping plate and the lower die base are provided with blanking holes, and the blanking channel is communicated with the blanking holes.

[0011] In a preferred implementation manner, the blank holder assembly includes a blank holder. The blank holder is connected to a push rod. The push rod passes through the lower clamping plate and the lower die base and is connected to a bearing plate. The bearing plate is provided with a reset mechanism. When the stretching die rises, the reset mechanism can make the blank holder return from the forming blank holding position to the initial blank holding position.

[0012] In a preferred implementation manner, the reset mechanism includes a screw rod. The screw rod is fixedly connected to the lower die base. The screw rod is provided with a bearing plate and a fixing plate. A spring is arranged between the two plates. The push rod is connected to the upper bearing plate, and the bearing plate can linearly move relative to the screw rod.

[0013] In a preferred implementation manner, the stretching die assembly includes an upper clamping plate and an upper die base. The upper clamping plate is arranged on the upper die base. The stretching die is fixedly connected to the upper clamping plate. The center of the stretching die has an inner forming cavity, and the inner forming cavity is adapted to the shape of the stretching punch.

[0014] In a preferred implementation manner, the punching punch is fixedly connected to the upper clamping plate and is located above the inner forming cavity. There is an annular space between the punching punch and the stretching die. A blanking and blank holding mechanism is installed in the annular space. The blanking and blank holding mechanism can cooperate with the punching punch to clamp the blank at the edge of the punching area during the punching process of the punching punch, and can unload the bottom-cut formed blank lifted by the punching punch when the punching punch rises.

[0015] In a preferred implementation, the blanking and blank-holding mechanism includes an inner blank-holder plate, a knockout rod, and a knockout plate. The knockout plate is disposed in the working chamber inside the upper die holder. One end of the knockout rod is connected to the knockout plate, and the other end passes through the upper clamping plate and is connected to the inner blank-holder plate. The knockout plate is connected to a lifting rod, and the lifting rod passes through the upper die holder. The lifting of the lifting rod causes the knockout plate to drive the knockout rod and the inner blank-holder plate to move downward, so that the inner blank-holder plate can abut against the blank at the edge of the punching area or push down the blank lifted by the punching punch after the forming process.

[0016] In a preferred implementation, the blanking and blank-holding mechanism includes an inner blank-holder plate and a knockout rod. One end of the knockout rod is connected to the upper clamping plate, and the other end is connected to one end of an elastic element, and the other end of the elastic element is connected to the inner blank-holder plate.

[0017] In a preferred implementation, the inner blank-holder plate is provided with a limiting boss, and the drawing die is provided with a limiting step. The limiting boss and the limiting step cooperate to limit the excessive displacement of the inner blank-holder plate. Description of the Drawings

[0018] The drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a schematic embodiment of the blank-holding ring assembly of the present application in the initial blank-holding position is shown;

[0020] Figure 2 A schematic structural diagram of a schematic embodiment of the blank-holding ring assembly of the present application in the forming blank-holding position is shown;

[0021] Reference Numerals:

[0022] 1 - Upper die holder; 2 - Upper clamping plate; 3 - Drawing die; 30 - Limiting step; 4 - Blank-holding ring; 5 - Lower clamping plate; 6 - Lower die holder; 7 - Knockout plate; 8 - Knockout rod; 9 - Punching punch; 10 - Inner blank-holder plate; 100 - Limiting boss; 11 - Drawing punch; 110 - Discharge channel; 12 - Ejector rod; 13 - Screw; 14 - Bearing plate; 15 - Spring; 16 - Fixed plate; 17 - Blanking hole. Detailed Description of the Embodiments

[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.

[0025] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed by an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature.

[0027] The present utility model will be described below in conjunction with the drawings of the specification.

[0028] The specific solution adopted is as follows:

[0029] As Figure 1-2 shown, the present utility model provides an integrally formed and highly efficient bottom-cutting die for a cage, including a stretching female die assembly, a stretching male die assembly, a blank-holder ring assembly, and a punching male die assembly;

[0030] A through discharging channel 110 is provided at the center of the stretching male die assembly, and the blank-holder ring assembly is arranged around it. The blank-holder ring assembly has an initial blank-holding position and a forming blank-holding position. At the initial blank-holding position, the upper surface of the blank-holder ring assembly is flush with the top surface of the stretching male die assembly, jointly forming a horizontal positioning surface for placing the blank. When the stretching female die 3 moves downward, it pushes the blank-holder ring assembly from the initial blank-holding position to the forming blank-holding position, and the blank is extruded between the stretching male die 11 and the stretching female die 3 to complete the stretching and forming of the blank.

[0031] The punching punch assembly is embedded in the center of the stretching female die assembly. The size of the punching punch 9 is adapted to the blanking channel 110. The stretching female die assembly and the punching punch assembly move synchronously. When the blank holding ring assembly reaches the forming blank holding position, the punching punch assembly penetrates the center of the formed blank to complete the operation of punching the bottom hole.

[0032] The integrated high-efficiency forming and bottom-cutting die integrates two key processes of stretching forming and punching the bottom hole. When the blank holding ring assembly is at the initial blank holding position, it jointly forms a horizontal positioning surface with the stretching punch assembly to ensure the accurate placement and positioning of the blank. As the stretching female die moves downward, the blank holding ring assembly switches to the forming blank holding position, and the stretching punch 11 exposes and enters the stretching female die 3. The synchronous movement design of the punching punch assembly and the stretching female die assembly enables the punching of the bottom hole immediately after the blank is stretched and formed. The blanking channel design of the stretching punch assembly enables the smooth discharge of excess material during the stretching process. The close cooperation between the stretching female die and the stretching punch ensures that the blank is subjected to uniform pressure during the stretching process, reducing the material transfer and positioning times between processes, thereby reducing the labor intensity and improving the production efficiency. Due to its improvement in production efficiency, reduction in scrap rate and labor cost, it can bring significant economic benefits in the long-term operation. At the same time, reducing the demand for multiple sets of dies and maintenance costs also helps to reduce the overall production cost.

[0033] See Figure 1 and Figure 2 The blank holding ring assembly includes a blank holding ring 4. The blank holding ring 4 is connected to a ejector rod 12. The ejector rod passes through the lower clamping plate 5 and the lower die base 6 and is connected to the bearing plate 14. The bearing plate 14 is provided with a reset mechanism. When the stretching female die rises, the reset mechanism can make the blank holding ring 4 return from the forming blank holding position to the initial blank holding position.

[0034] Specifically, the reset mechanism includes a screw 13. The screw is fixedly connected to the lower die base 6. The screw is provided with a bearing plate 14 and a fixing plate 16. A spring 15 is provided between the two plates. The ejector rod 12 is connected to the upper bearing plate, and the bearing plate can linearly move relative to the screw.

[0035] See Figure 1 and Figure 2, the drawing punch assembly includes a lower clamping plate 5 and a lower die base 6. The lower clamping plate is located above the lower die base. The drawing punch assembly and the drawing die assembly are key parts in the metal drawing forming process, and they work together to shape metal sheets or strips into the required shapes. Among them, the lower clamping plate of the drawing punch assembly is a flat plate structure located above the lower die base, mainly used to fix and support the drawing punch. It ensures that during the drawing process, the punch can stably maintain its position and shape without deviation or deformation; the lower die base is the bottom support structure of the drawing punch assembly, which provides the stability and rigidity of the entire assembly. The lower die base is connected to the workbench of the press and bears the reaction force during the drawing process. To facilitate the discharge of waste materials after drawing forming, blanking holes 17 are opened on the lower clamping plate and the lower die base and are connected to the discharge channel 110 to ensure that the waste materials can be discharged smoothly without affecting continuous production.

[0036] The upper clamping plate 2 of the drawing die assembly is arranged on the lower side of the upper die base 1 and is used to fix the drawing die 3. The upper clamping plate ensures the stability of the die during the drawing process and prevents it from deforming due to uneven force; the upper die base is the top support structure of the drawing die assembly, which is connected to the slider of the press and moves up and down with the slider during the drawing process; the drawing die is fixedly connected to the upper clamping plate, and its center has an inner forming cavity adapted to the shape of the drawing punch. The shape of the inner forming cavity of the drawing die matches the outer shape of the required part. Through the die closing action of the upper and lower dies, the metal sheet gradually conforms and forms under the action of the drawing force.

[0037] The punching punch 9 is fixedly connected to the upper clamping plate and is located above the inner forming cavity. There is an annular space between the punching punch 9 and the drawing die 3. A blanking and blank holding mechanism is installed in the annular space. The blanking and blank holding mechanism can cooperate with the punching punch to clamp the blank at the edge of the punching area during the punching process of the punching punch, and can unload the bottom-cut formed blank lifted by the punching punch when the punching punch rises. The main function of the punching punch is to cut out the required holes on the metal sheet through its sharp cutting edge. The blanking and blank holding mechanism plays a key role during the punching process. It can quickly clamp the blank at the edge of the punching area when the punching punch presses down. This clamping effect helps to prevent the deformation or unevenness of the material edge during the punching process and improves the punching quality. When the punching is completed and the punching punch rises, the blanking and blank holding mechanism can timely release and unload the bottom-cut formed blank lifted by the punching punch. This automatic unloading function not only improves production efficiency but also reduces manual intervention and operation risks.

[0038] Specifically, the blanking and blank-holding mechanism includes an inner stripper plate 10, a knockout rod 8, and a knockout plate 7. The knockout plate is disposed in the working chamber inside the upper die base 1. One end of the knockout rod is connected to the knockout plate, and the other end passes through the upper clamping plate to connect to the inner stripper plate. The knockout plate is connected to a lifting rod, and the lifting rod passes through the upper die base. The lifting of the lifting rod causes the knockout plate to drive the knockout rod and the inner stripper plate to move downward, so that the inner stripper plate can abut against the blank at the edge of the punching area or push down the blank lifted by the punching punch after the forming process.

[0039] Working process: Refer to Figure 1 , Initial state: Before punching starts, the inner stripper plate, knockout rod, knockout plate, and lifting rod are in the first position under their own gravity. The knockout plate contacts the lower side of the working chamber, and the blank-holding ring is flush with the upper surface of the drawing punch. Place the blank disc.

[0040] Pressing process: Refer to Figure 2 , When the drawing die and the punching punch start to press down for forming and punching, the inner stripper plate will first contact the blank at the edge of the punching area. As the drawing die continues to press down the blank-holding ring, the drawing punch gradually exposes and enters the inner forming cavity, pushing the inner stripper plate 10. The inner stripper plate pushes the knockout plate and the lifting rod upward through the knockout rod. Due to the limiting effect of the working chamber, the knockout plate can only rise to a certain height, that is, the limiting position for pressing the edge of the blank. At this time, the inner stripper plate tightly presses the edge of the blank.

[0041] Forming and punching process: While pressing the blank, the forming and punching actions of the blank are completed.

[0042] Unloading process: After forming and punching are completed, the drawing die starts to rise. The inner stripper plate and the connected knockout rod, knockout plate, and lifting rod naturally descend under the action of gravity, pushing down the formed and bottom-cut processed product lifted by the punching punch, realizing automatic unloading.

[0043] Furthermore, the inner stripper plate is provided with a limiting boss, and the drawing die is provided with a limiting step. The limiting boss 100 and the limiting step 30 cooperate to limit the excessive downward displacement of the inner stripper plate.

[0044] As the inner stripper plate, knockout rod, and knockout plate descend and the blank-holding ring resets, the entire mechanism returns to the initial state, ready for the next forming, punching, and unloading cycle, making full use of the principles of gravity and mechanical transmission, realizing the functions of automatically pressing the edge of the blank and automatically unloading the waste, and improving production efficiency and safety.

[0045] As a preferred embodiment under this embodiment, one end of the knockout rod is connected to the upper clamping plate, and the other end is connected to one end of an elastic element. The other end of the elastic element is connected to the inner stripper plate. The inner stripper plate can also be reset up and down independently by the spring force. It is not shown in the figure and will not be elaborated in this application.

[0046] What is not described in this utility model can be achieved by adopting or referring to the existing technology.

[0047] The above is only the specific implementation manner of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by this utility model can easily think of various changes or substitutions, and these should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model shall be subject to the protection scope of the claims.

Claims

1. A high-efficiency bottom cutting die for integrally forming a retainer, characterized in that: It includes a stretching female die assembly, a stretching male die assembly, a blank holder assembly and a punching male die assembly; A through discharging channel is provided in the center of the stretching male die assembly, and the blank holder assembly is arranged around it. The blank holder assembly has an initial blank holding position and a forming blank holding position. At the initial blank holding position, the upper surface of the blank holder assembly is flush with the top surface of the stretching male die assembly, jointly forming a horizontal positioning surface for placing the blank. When the stretching female die moves downward, it pushes the blank holder assembly from the initial blank holding position to the forming blank holding position, and the blank is extruded between the stretching male die and the stretching female die to complete the stretching and forming of the blank; The punching male die assembly is embedded in the center of the stretching female die assembly. The size of the punching male die is adapted to the discharging channel. The stretching female die assembly and the punching male die assembly move synchronously. When the blank holder assembly reaches the forming blank holding position, the punching male die assembly penetrates the center of the formed blank to complete the operation of punching the bottom hole.

2. The cage integrated high-efficiency forming bottom-cutting die according to claim 1, wherein The stretching male die assembly includes a lower clamping plate and a lower die base. The lower clamping plate is located above the lower die base and is used to fix and support the stretching male die. The lower clamping plate and the lower die base are provided with blanking holes, and the discharging channel communicates with the blanking holes.

3. The cage integrally and efficiently formed bottom-cutting die according to claim 2, wherein The blank holder assembly includes a blank holder. The blank holder is connected to a ejector rod. The ejector rod passes through the lower clamping plate and the lower die base and is connected to a bearing plate. The bearing plate is provided with a reset mechanism. When the stretching female die rises, the reset mechanism can make the blank holder return from the forming blank holding position to the initial blank holding position.

4. The cage integrated high-efficiency forming and bottom-cutting die according to claim 3, characterized in that, The reset mechanism includes a screw rod. The screw rod is fixedly connected to the lower die base. The screw rod is provided with a bearing plate and a fixing plate. A spring is arranged between the two plates. The ejector rod is connected to the upper bearing plate, and the bearing plate can linearly move relative to the screw rod.

5. The cage integrally and efficiently formed bottom-cutting die according to claim 2, wherein The stretching female die assembly includes an upper clamping plate and an upper die base. The upper clamping plate is arranged on the upper die base. The stretching female die is fixedly connected to the upper clamping plate. The center of the stretching female die has an inner forming cavity, and the inner forming cavity is adapted to the shape of the stretching male die.

6. The cage integrated high-efficiency forming bottom-cutting die according to claim 5, characterized in that, The punching male die is fixedly connected to the upper clamping plate and is located above the inner forming cavity. There is an annular space between the punching male die and the stretching female die. A blanking and blank holding mechanism is installed in the annular space. The blanking and blank holding mechanism can cooperate with the punching male die to clamp the blank at the edge of the punching area during the punching process of the punching male die, and can unload the bottom-formed blank lifted by the punching male die when the punching male die rises.

7. The cage integrally and efficiently formed bottom-cutting die according to claim 6, wherein The blanking and blank holding mechanism includes an inner stripper plate, a punching rod and a punching plate. The punching plate is arranged in the working chamber inside the upper die base. One end of the punching rod is connected to the punching plate, and the other end passes through the upper clamping plate and is connected to the inner stripper plate. The punching plate is connected to a lifting rod. The lifting rod passes through the upper die base. The lifting of the lifting rod makes the punching plate drive the punching rod and the inner stripper plate to move downward, so that the inner stripper plate can abut against the blank at the edge of the punching area or push the blank lifted by the punching male die to fall after the forming process.

8. The cage integrated high-efficiency forming and bottom-cutting die according to claim 6, characterized in that, The blanking and blank holding mechanism includes an inner stripper plate and a punching rod. One end of the punching rod is connected to the upper clamping plate, and the other end is connected to one end of an elastic element. The other end of the elastic element is connected to the inner stripper plate.

9. The cage integrally and efficiently formed bottom-cutting die according to any one of claims 7 or 8, characterized in that The inner stripper plate is provided with a limiting boss, and the stretching female die is provided with a limiting step. The limiting boss and the limiting step cooperate to limit the excessive displacement of the inner stripper plate.

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