Continuous die structure for deep cup-shaped structural parts
By setting a continuous punching die structure with an insert on the upper die and a punch on the lower die, the product can be drawn upwards and automatically demolded, which solves the problems of difficult removal and burr removal in the forming production of deep cylindrical structural parts, improves production efficiency and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN QIANGFA METAL PROD CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-29
AI Technical Summary
In the existing technology, the molding and production of deep cylindrical structural parts requires manual or robotic removal of the product, and secondary deburring is required, resulting in high production costs and low efficiency.
The continuous die structure is adopted. By setting several inserts on the upper die, which cooperate with the punches on the lower die, the product is drawn upward, the burrs are cut off and left on the upper surface of the product, and the product is automatically removed from the die by using air pipes and cavities.
This ensures product appearance quality, eliminates the deburring process, reduces production costs, improves production efficiency, and enables automatic demolding, making it economical and efficient.
Smart Images
Figure CN224294467U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stamping die technology, and in particular to a continuous stamping die structure for deep cylindrical structural parts. Background Technology
[0002] In the forming of deep cylindrical structural parts using stamping dies, the current majority of die structures employ downward drawing, which reduces the likelihood of sheet metal tearing and simplifies the die structure. However, this forming process presents two problems: first, the product must be manually or with the aid of a robotic arm removed from the lower die after forming; second, burrs on the product's end face need to be removed a second time. This is because, due to the sheet metal being drawn downwards to the die, the subsequent process of using punches on the upper die to cut the upper contour of the product leaves burrs along the upper edge. Furthermore, although an ejector module is provided on the lower die, it only lifts the product from the die insert; the product does not detach from the lower die and still requires external force to remove it. Therefore, the stamping production of such structural products requires dedicated manpower or a material transfer module to remove the product and necessitates an additional burr removal process, making it difficult to reduce production costs. Utility Model Content
[0003] To address the problems existing in the prior art, this utility model provides a continuous stamping die structure for deep cylindrical structural parts. By setting several inserts on the upper die and cooperating with several punches on the lower die, the product can be drawn upwards. This leaves the cut burrs on the product near the drawn end face, i.e., the lower end face of the upper part of the product. This not only ensures the appearance quality of the product, but also eliminates the need for subsequent deburring processes based on the actual use of the product, reducing production costs. At the same time, the undercut product can be left on the upper die. With the help of the cavity and air pipe, the product can be automatically and completely removed from the die. This is economical, efficient, and fast, improving production efficiency and further reducing production costs.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] A continuous stamping die structure for deep cylindrical structural parts, comprising an upper die, a lower die, and a forming module; the forming module includes two or more lifting and drawing modules and a stripping module arranged sequentially along the material strip's forward direction, wherein:
[0006] The drawing depth of the plurality of lifting and drawing modules gradually increases along the forward direction of the strip, and a buffer module is provided between each pair of adjacent lifting and drawing modules. Each lifting and drawing module includes a forming punch that matches each other and is respectively provided on the lower die and a forming insert provided on the upper die. The plurality of forming punches increase in height and decrease in diameter along the traveling direction of the strip. Each buffer module includes a buffer insert provided on the upper die.
[0007] The stripping module includes a matching stripping punch and a stripping insert. The stripping punch is located on the lower die and can cut the product off the strip. The stripping insert is located on the upper die and has a cavity at its upper end that is connected to and extends to the outer wall of the upper die. An air pipe is located next to the cavity and is connected to an air pump. The airflow in the air pipe can blow the product that falls into the cavity away from the upper die.
[0008] As a further explanation of the above technical solution:
[0009] In the above technical solution, each of the lifting and drawing modules further includes a lower lifting plate provided on the lower die and a higher lifting plate provided on the upper die: each higher lifting plate is adapted to the upper end of the semi-finished product at the current work station, and each lower lifting plate is connected to the first elastic component provided on the lower die.
[0010] In the above technical solution, the stripping module further includes a lower stripping plate disposed on the lower mold and an upper stripping template disposed on the upper mold: the upper stripping template is adapted to the upper end of the product.
[0011] In the above technical solution, one or more shaping modules are provided between the lifting and drawing module and the stripping module at the last end. Each shaping module includes a shaping punch on the lower die and a shaping insert on the upper die. Each shaping insert is adapted to a shaping punch and to the semi-finished product at the current station.
[0012] In the above technical solution, a buffer module is provided between the shaping module and the lifting and drawing module, and between the shaping module and the unloading module.
[0013] In the above technical solution, a punching module for forming the upper end face structure of the drawn part of the product is also provided on the front side of the lifting and drawing module at the foremost end. The punching module includes a punching insert and a punching lower template provided on the lower die, and a punching upper stripper and a punching punch provided on the upper die. The punching lower template is adapted to the upper end of the product. The punching punch matches the punching insert and is fixed on the punching lower template. The punching upper stripper is connected to the second elastic component provided on the upper die.
[0014] In the above technical solution, the upper mold includes an upper cover plate and an upper mold base mounted below it. Each of the lifting upper mold plates is fixed below the upper mold base. The upper mold base is slidably equipped with a plurality of ejector pins extending along the mold opening direction and disposed around each of the forming inserts. The upper end of each ejector pin is connected to the upper cover plate through a third elastic component, and its lower end can pass through the upper mold and extend below it to push the material strip and drive the semi-finished product on it to leave the upper mold.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a number of inserts on the upper mold and cooperating with a number of punches on the lower mold, the product can be drawn upwards, thereby leaving the cutting burrs on the product near the drawn end face, that is, the lower end face of the upper end of the product. This not only ensures the appearance quality of the product, but also eliminates the need for subsequent deburring process according to the actual use of the product, reducing production costs. At the same time, the undercut product can be left on the upper mold. With the help of the cavity and air pipe, the product can be automatically and completely removed from the mold, which is economical, efficient and fast, improving production efficiency and further reducing production costs. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure during mold opening in this embodiment;
[0017] Figure 2 This is a structural schematic diagram from another perspective during mold opening in this embodiment;
[0018] Figure 3 This is a front view structural diagram of the mold opening process in this embodiment;
[0019] Figure 4 This is a front view structural diagram of the mold closing process in this embodiment.
[0020] In the diagram: 100, Upper die; 11, Upper cover plate; 12, Upper die base; 200, Lower die; 21, Lower die base; 22, Lower pad plate; 300, Material strip; 400, Lifting and drawing module; 41, Forming punch; 42, Forming insert; 43, Lifting lower stripper plate; 44, Lifting upper template plate; 500, Stripping module; 51, Stripping punch; 52, Stripping insert; 53, Cavity; 55, Stripping lower stripper plate; 56, Stripping upper template plate; 600, Buffer module; 61, Buffer insert; 700, Shaping module; 71, Shaping punch; 72, Shaping insert; 800, Punching module; 81, Punching insert; 82, Punching lower template plate; 83, Punching upper stripper plate; 84, Punching punch; 1, First elastic component; 2, Second elastic component; 3, Third elastic component; 4, Product. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings.
[0022] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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 limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0023] like Figure 1-2 As shown, the continuous stamping die structure for the deep cylindrical component includes an upper die 100, a lower die 200, and a forming module. The forming module comprises two or more lifting and drawing modules 400 and a stripping module 500 arranged sequentially along the forward direction of the strip 300.
[0024] The drawing depth of several lifting and drawing modules 400 gradually increases along the forward direction of the strip 300. A buffer module 600 is provided between each pair of adjacent lifting and drawing modules 400. Each lifting and drawing module 400 includes a forming punch 41 that is matched with each other and is respectively provided on the lower die 200 and a forming insert 42 provided on the upper die 100. Several forming punches 41 increase in height and decrease in diameter along the forward direction of the strip 300. Each buffer module 600 includes a buffer insert 61 provided on the upper die 100.
[0025] The stripping module 500 includes a stripping punch 51 and a stripping insert 52 that are matched with each other. The stripping punch 51 is set on the lower die 200 and can cut the product off the strip 300. The stripping insert 52 is set on the upper die 100 and has a cavity 53 formed at its upper end that is connected to it and extends to the outer wall of the upper die 100. An air pipe is provided on the side of the cavity 53 and is connected to an air pump. The airflow in the air pipe can blow the product that falls into the cavity 53 away from the upper die 100.
[0026] Figure 1-4 The structural diagrams of the lifting and drawing module 400, stripping module 500, buffer module 600, shaping module 700, and punching module 800 of the progressive die in the open and closed states are shown from different perspectives:
[0027] Each lifting and drawing module 400 also includes a lifting lower stripping plate 43 on the lower die 200 and a lifting upper template 44 on the upper die 100: each lifting upper template 44 is adapted to the upper end of the semi-finished product at the current work station, and each lifting lower stripping plate 43 is connected to the first elastic component 1 on the lower die 200.
[0028] The stripping module 500 also includes a stripping lower stripping plate 55 on the lower mold 200 and a stripping upper template 56 on the upper mold 100: the stripping upper template 56 is adapted to the upper end of the product 4.
[0029] One or more shaping modules 700 are provided between the lifting and drawing module 400 and the stripping module 500 at the last end. Each shaping module 700 includes a shaping punch 71 on the lower die 200 and a shaping insert 72 on the upper die 100. Each shaping insert 72 is adapted to a shaping punch 71 and to the semi-finished product at the current station. A buffer module 600 is provided between a shaping module 700 and the lifting and drawing module 400, and between a shaping module 700 and the stripping module 500.
[0030] A punching module 800 for forming the upper end face structure of the drawn part of the product 4 is also provided on the front side of the lifting and drawing module 400 at the front end. The punching module 800 includes a punching insert 81 and a punching lower template 82 provided on the lower die 200, and a punching upper stripper plate 83 and a punching punch 84 provided on the upper die 100. The punching lower template 82 is adapted to the upper end of the product 4. The punching punch 84 matches the punching insert 81 and is fixed on the punching lower template 82. The punching upper stripper plate 83 is connected to the second elastic component 2 provided on the upper die 100.
[0031] like Figure 3 As shown, the upper mold 100 includes an upper cover plate 11 and an upper mold base 12 mounted below it. Each lifting upper mold plate 44 is fixed below the upper mold base 12. Several ejector pins 13 extending along the mold opening direction and located around each forming insert 42 are slidably mounted on the upper mold base 12. The upper end of each ejector pin 13 is connected to the upper cover plate 11 via a third elastic member 3, and its lower end can pass through the upper mold 100 and extend below it to push the material strip 300 to drive the semi-finished product on it away from the upper mold 100. The lower mold 200 includes several lower pads 22 and a lower mold base 21 mounted on them. Several first elastic members 1 are mounted on the lower mold base 21, and each elastic member 1 is connected to the lower ejector plate on the lower mold.
[0032] During mold closing, the strip 300 first passes through the punching module 800 to punch and form the closed structure at the top of the product. Subsequently, multiple lifting and drawing modules 400 progressively draw the strip 300 upwards. A buffer module 600 between the lifting and drawing modules 400 provides a buffer time between them, preventing or mitigating tearing of the strip and its semi-finished product. The shaping module 700 then fine-tunes the contour of the drawn semi-finished product. Finally, the stripping module 500 punches the formed product off the strip 300 and pushes it into the upper mold 100. Inside the stripper 52 on the upper die, during the next die closing, the next product is pushed into the stripper 52. This product pushes the previous product into the cavity 53, and the airflow blows it out of the upper die 100. During the die opening process, the ejector pins 13 on the upper die 100, located next to the forming insert 42, buffer insert 61 and shaping insert 72, extend to the outside of the upper die plate under the rebound force of the third elastic component 3, pushing the strip 300 together with the semi-finished product connected to it away from the upper die 100, and falling into the next station under the action of the automatic feeding mechanism.
[0033] In application, in order to ensure the forward direction of the strip, the upper end of the lower die 200 is provided with two rows of guide blocks on both sides of the strip 200 for guiding the strip 300.
[0034] This invention, by setting several inserts on the upper mold 100 and cooperating with several punches on the lower mold 200, enables the upward drawing of the product. This leaves the burrs on the product near the drawn end face, i.e., the lower end face of the upper part of the product. This not only ensures the appearance quality of the product, but also eliminates the need for subsequent deburring processes based on the actual use of the product, reducing production costs. At the same time, the undercut product can be left in the upper mold 100. With the help of the cavity 54 and the air pipe, the product can be automatically and completely removed from the mold. This is economical, efficient, and fast, improving production efficiency and further reducing production costs.
[0035] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.
Claims
1. A progressive die structure for deep cylindrical structural parts, wherein the progressive die is provided with an upper die, a lower die, and a forming module; characterized in that, The forming module includes two or more lifting and drawing modules and a stripping module arranged sequentially along the forward direction of the strip, wherein: The drawing depth of the plurality of lifting and drawing modules gradually increases along the forward direction of the strip, and a buffer module is provided between each pair of adjacent lifting and drawing modules. Each lifting and drawing module includes a forming punch that matches each other and is respectively provided on the lower die and a forming insert provided on the upper die. The plurality of forming punches increase in height and decrease in diameter along the traveling direction of the strip. Each buffer module includes a buffer insert provided on the upper die. The stripping module includes a matching stripping punch and a stripping insert. The stripping punch is located on the lower die and can cut the product off the strip. The stripping insert is located on the upper die and has a cavity at its upper end that is connected to and extends to the outer wall of the upper die. An air pipe is located next to the cavity and is connected to an air pump. The airflow in the air pipe can blow the product that falls into the cavity away from the upper die.
2. The continuous stamping die structure for deep cylindrical structural members according to claim 1, characterized in that, Each of the lifting and drawing modules further includes a lower lifting plate on the lower die and an upper lifting plate on the upper die: each upper lifting plate is adapted to the upper end of the semi-finished product at the current work station, and each lower lifting plate is connected to a first elastic component on the lower die.
3. The continuous stamping die structure for deep cylindrical structural members according to claim 1, characterized in that, The stripping module also includes a lower stripping plate on the lower mold and an upper stripping template on the upper mold: the upper stripping template is adapted to the upper end of the product.
4. The continuous stamping die structure for deep cylindrical structural members according to claim 1, characterized in that, One or more shaping modules are provided between the lifting and drawing module and the stripping module at the last end. Each shaping module includes a shaping punch on the lower die and a shaping insert on the upper die. Each shaping insert is adapted to a shaping punch and to the semi-finished product at the current station.
5. The continuous stamping die structure for deep cylindrical structural members according to claim 4, characterized in that, A buffer module is provided between the shaping module and the lifting and drawing module, and between the shaping module and the unloading module.
6. The continuous stamping die structure for deep cylindrical structural members according to claim 1, characterized in that, A punching module for forming the upper end face structure of the drawn part of the product is also provided on the front side of the lifting and drawing module at the foremost end. The punching module includes a punching insert and a punching lower template on the lower die, and a punching upper stripper and a punching punch on the upper die. The punching lower template is adapted to the upper end of the product. The punching punch matches the punching insert and is fixed on the punching lower template. The punching upper stripper is connected to a second elastic component on the upper die.
7. The continuous stamping die structure for deep cylindrical structural members according to claim 2, characterized in that, The upper mold includes an upper cover plate and an upper mold base mounted below it. Each of the lifting upper mold plates is fixed below the upper mold base. The upper mold base is slidably equipped with a number of ejector pins that extend along the mold opening direction and are located around each of the forming inserts. The upper end of each ejector pin is connected to the upper cover plate through a third elastic component, and its lower end can pass through the upper mold and extend below it to push the material strip and drive the semi-finished product on it to leave the upper mold.