Stamping die convenient to demould

Abstract

The utility model discloses a stamping die convenient to demould, and particularly relates to the technical field of stamping dies, the stamping die convenient to demould comprises a support frame mechanism, an upper die mechanism and a lower die disc, the support frame mechanism comprises a top plate and a bottom plate, and the upper die mechanism and the lower die disc are distributed up and down and located between the top plate and the bottom plate; transmission mechanisms and guide mechanisms are arranged on the two sides of the upper mold mechanism and the two sides of the lower mold disc correspondingly, and the lower mold mechanism is arranged below the lower mold disc. The upper mold mechanism comprises an upper mold, a demolding pressing ring and an inserting rod. Through the cooperation of the lower mold, the transmission mechanism and the guide mechanism, hydraulic oil flows to complete demolding when the guide mechanism moves upwards on the upper mold, multiple layers of springs are not needed, the maintenance period is prolonged, and the cost is reduced; due to the design of centrosymmetric sliding grooves, uniform force application and stable jacking are ensured; the chassis is fixed through bolts, and internal sliding connection facilitates installation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a stamping die that is easy to demold. Background Technology

[0002] Stamping dies are precision tooling used for sheet metal forming. Installed on stamping equipment, they utilize pressure to separate or deform metallic or non-metallic materials within the die, thereby obtaining parts of the desired shape and size. They consist of upper and lower die bases, working parts (such as punches and dies), positioning parts, and unloading devices. They are characterized by high efficiency, high precision, and low cost, and are widely used in the production of parts in the automotive, electronics, and home appliance industries.

[0003] A stamping die with easy demolding, disclosed in announcement number CN222587868U, relates to the field of stamping dies. It includes an operating table, positioning columns, a lifting plate, a hydraulic mechanism, an upper die, an annular pressure block, and a lower die. The lower die has a groove corresponding to the upper die on its end face. A top plate is provided at the bottom of the groove. Multiple sliding cavities are formed on the lower side of the groove. A driving block is installed in each sliding cavity, with its side away from the groove connected to the inner wall of the corresponding sliding cavity via a return spring. A first sliding groove is formed at the end of the driving block near the groove. A push rod is slidably mounted in the first sliding groove, with its end away from the driving block connected to the top plate. This stamping die enables automatic demolding of stamped parts, reducing unloading time and improving stamping efficiency.

[0004] The inventors have discovered at least the following problems in the prior art:

[0005] Firstly, the equipment uses multiple layers of springs in the lower mold, along with grooves and annular blocks, to push the formed workpiece out of the mold after stamping. However, after prolonged use, this will cause the springs to lose force, making demolding impossible, and the maintenance cycle is short.

[0006] Secondly, the demolding device is installed inside the lower mold, making it troublesome to maintain or replace the internal demolding mechanism.

[0007] Therefore, the aforementioned technical problems need to be solved. Utility Model Content

[0008] To overcome the shortcomings of the existing technology, this utility model proposes a stamping die that is easy to demold. The die can automatically demold the formed workpiece through the cooperation of the set lower die mechanism, transmission mechanism and guiding mechanism, without the need for multiple layers of return springs, thereby extending the maintenance cycle and reducing maintenance costs and downtime.

[0009] To solve the above-mentioned technical problems, the basic technical solution proposed by this utility model is as follows:

[0010] A stamping die for easy demolding includes a support frame mechanism, an upper die mechanism, and a lower die plate. The support frame mechanism includes a top plate and a bottom plate. The upper die mechanism and the lower die plate are distributed vertically and located between the top plate and the bottom plate. A transmission mechanism and a guide mechanism are provided on both sides of the upper die mechanism and the lower die plate. The lower die mechanism is located below the lower die plate. The upper die mechanism includes an upper die, a demolding pressure ring, and an insert rod. The lower die mechanism includes a base plate and a demolding ejector rod. A recessed groove is formed on the base plate at the demolding ejector rod. Sliding grooves are formed on both sides of the recessed groove, and the sliding grooves on both sides are centrally symmetrical. The transmission mechanism includes a connecting plate, a hydraulic cylinder one, a hydraulic cylinder two, and a push rod. The push rod is inserted into both sides of the base plate, with one end located inside the sliding groove. A stop block and a piston two are fixedly connected to both ends of the push rod, respectively. The guide mechanism includes a guide post one and a guide post two fixedly connected vertically, and a connecting slip ring sleeved around the guide post two. The guide post one penetrates the top plate.

[0011] Preferably, the connecting plate is penetrated by a hydraulic cylinder, and there are two hydraulic cylinders located above the connecting plate. The hydraulic cylinders are installed below the top plate.

[0012] Preferably, a linkage rod is inserted into the lower end of the hydraulic cylinder, the lower end of the linkage rod is fixedly connected to the connecting plate, and a piston is fixedly connected to one end of the linkage rod inside the hydraulic cylinder.

[0013] Preferably, the piston two is slidably connected inside the hydraulic cylinder two, and the ports of the hydraulic cylinder one and the hydraulic cylinder two are connected by a connecting pipe.

[0014] Preferably, a receiving plate is fixedly connected to the lower part of the demolding ejector pin, the receiving plate fits into the recessed groove, and springs are provided on both sides below the receiving plate.

[0015] Preferably, a connecting block is fixedly connected below the second guide post and the connecting block is located below the connecting plate. The connecting block is installed on the periphery of the upper mold. An elastic element is fixedly connected above the sliding ring and the elastic element is sleeved on the periphery of the second guide post.

[0016] Preferably, a recessed groove is provided above the lower mold plate, and the demolding ejector rod passes through the bottom surface of the recessed groove and is fixedly connected to the receiving plate.

[0017] Preferably, the upper mold has a protrusion at its lower part, which fits into the recessed groove. The insert rods are evenly distributed around the upper part of the demolding ring and are inserted into the lower part of the upper mold. A spring is provided around the insert rods, and the demolding ring is located around the protrusion.

[0018] The beneficial effects of this utility model are:

[0019] The technical solution of this utility model is as follows: By setting up a lower mold mechanism, a transmission mechanism and a guiding mechanism to cooperate with each other, when the upper mold moves upward, the hydraulic oil in the first hydraulic cylinder can enter the interior of the second hydraulic cylinder through the guiding mechanism, thereby completing the demolding. This eliminates the need for multiple layers of return springs for demolding, thereby extending the maintenance cycle, reducing maintenance costs and downtime. In addition, the abutment blocks in the centrally symmetrical slides apply force more evenly to the demolding ejector during the lifting process, resulting in a more stable lifting.

[0020] The technical solution of this utility model is as follows: the chassis is fixed to the lower mold plate by bolts, while the abutment, push rod and piston are slidably connected inside the chassis, making the entire stamping die easier and faster to install and maintain. Attached Figure Description

[0021] Figure 1 This is a perspective view of Embodiment 1 of the present utility model;

[0022] Figure 2 This is a schematic diagram of the overall internal structure of Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of the upper mold mechanism and guide mechanism according to Embodiment 1 of this utility model;

[0024] Figure 4 This is a schematic diagram of the lower mold mechanism structure according to Embodiment 1 of this utility model;

[0025] Figure 5 This is a schematic diagram of the transmission mechanism structure according to Embodiment 1 of this utility model;

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Support frame mechanism; 11. Top plate; 12. Support guide column; 13. Base plate; 14. Electric hydraulic cylinder; 15. Mounting plate;

[0028] 2. Upper mold mechanism; 21. Upper mold; 22. Protrusion; 23. Demolding ring; 24. Insert rod; 25. Spring 1;

[0029] 3. Lower mold mechanism; 31. Lower mold plate; 311. Recessed groove; 32. Base plate; 33. Ejector pin; 34. Support plate; 35. Spring 2; 36. Recessed groove; 37. Slide groove;

[0030] 4. Transmission mechanism; 41. Connecting plate; 42. Hydraulic cylinder one; 43. Linkage rod; 44. Piston one; 45. Hydraulic cylinder two; 46. Push rod; 47. Abutment block; 48. Piston two; 49. Connecting pipe;

[0031] 5. Guiding mechanism; 51. Guide post one; 52. Guide post two; 53. Connecting block; 54. Connecting slip ring; 55. Elastic element. Detailed Implementation

[0032] The following will be combined with the appendix Figure 1 To be continued Figure 5 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0033] It should be noted that, in the embodiments of this utility model, the directions shown in the accompanying drawings shall prevail, such as front and back. Figure 1 For the sake of accuracy, the specific details should be as follows: Figure 1 The left side is the front. Figure 1 The right side is the rear; at the same time, as Figure 2 As shown, the horizontal direction is roughly defined as left and right, and the vertical direction is defined as up and down. If a specific orientation changes, the directional indication will also change accordingly.

[0034] Reference Figures 1-5 As shown, this utility model provides a stamping die that is easy to demold, including a support frame mechanism 1, an upper die mechanism 2 and a lower die plate 31. The support frame mechanism 1 includes a top plate 11 and a bottom plate 13. The upper die mechanism 2 and the lower die plate 31 are distributed vertically and located between the top plate 11 and the bottom plate 13. A transmission mechanism 4 and a guide mechanism 5 are provided on both sides of the upper die mechanism 2 and the lower die plate 31. The lower die mechanism 3 is provided below the lower die plate 31.

[0035] The upper mold mechanism 2 includes an upper mold 21, a demolding pressure ring 23, and an insert rod 24;

[0036] The lower mold mechanism 3 includes a base plate 32 and a demolding ejector pin 33. The base plate 32 is provided with a recessed groove 36 at the demolding ejector pin 33. Sliding grooves 37 are provided on both sides of the recessed groove 36, and the sliding grooves 37 on both sides are centrally symmetrical.

[0037] The transmission mechanism 4 includes a connecting plate 41, a hydraulic cylinder 42, a hydraulic cylinder 45, and a push rod 46. The push rod 46 is inserted into both sides of the chassis 32 and one end is located inside the slide groove 37. The two ends of the push rod 46 are respectively fixedly connected to a stop block 47 and a piston 48.

[0038] The guiding mechanism 5 includes a first guide post 51 and a second guide post 52 that are fixedly connected at the top and bottom, and a connecting slip ring 54 sleeved around the second guide post 52. The first guide post 51 penetrates the top plate 11.

[0039] The support frame mechanism 1 also includes support guide columns 12, electric hydraulic cylinders 14 and mounting plates 15. The support guide columns 12 are located at the four corners of the top plate 11 and are fixedly connected to the top plate 11 and the bottom plate 13. The electric hydraulic cylinders 14 are installed above the top plate 11. The output end of the electric hydraulic cylinders 14 is equipped with the mounting plates 15. The mounting plates 15 are located above the upper mold 21. The electric hydraulic cylinders 14 are used to support the upper mold 21. The support frame mechanism 1, the upper mold mechanism 2 and the lower mold plate 31 constitute the stamping die in the prior art.

[0040] In a further embodiment, the connecting plate 41 is penetrated by a hydraulic cylinder 42, which is located above the connecting plate 41 and there are two hydraulic cylinders 42. The hydraulic cylinders 42 are installed below the top plate 11.

[0041] In this embodiment, hydraulic oil is provided inside the hydraulic cylinder 42 and above the piston 44, and hydraulic oil is also provided inside the hydraulic cylinder 45 and to one side of the piston 48. The amount of hydraulic oil here is constant; the length of the two hydraulic cylinders 42 is the same as the length of the hydraulic cylinder 45.

[0042] In a further embodiment, a linkage rod 43 is inserted into the lower end of the hydraulic cylinder 42, the lower end of the linkage rod 43 is fixedly connected to the connecting plate 41, and a piston 44 is fixedly connected to one end of the linkage rod 43 inside the hydraulic cylinder 42.

[0043] In this embodiment, both piston 44 and piston 48 are surrounded by rubber oil seals, and the holes at the joints of linkage rod 43 and push rod 46 are larger than the diameters of linkage rod 43 and push rod 46, allowing air to enter, but not to pass through piston 44 and piston 48.

[0044] In a further embodiment, piston 48 is slidably connected inside hydraulic cylinder 45, and the ports of hydraulic cylinder 42 and hydraulic cylinder 45 are connected by connecting pipe 49.

[0045] In this embodiment, both hydraulic cylinder 42 and hydraulic cylinder 45 are provided with oil inlet and outlet ends, which are connected to connecting pipe 49 to deliver hydraulic oil.

[0046] In a further embodiment, a receiving plate 34 is fixedly connected below the ejector pin 33, the receiving plate 34 fits into the recessed groove 36, and springs 35 are provided on both sides below the receiving plate 34.

[0047] In this embodiment, spring 35 is used as a temporary support after the bottom of the receiving plate 34 loses the support of the abutment block 47.

[0048] In a further embodiment, a connecting block 53 is fixedly connected below the second guide post 52 and the connecting block 53 is located below the connecting plate 41. The connecting block 53 is installed on the periphery of the upper mold 21. An elastic element 55 is fixedly connected above the sliding ring 54 and is sleeved on the periphery of the second guide post 52.

[0049] In this embodiment, the total length of guide post 1 51 and guide post 2 52 is the downward stroke of the upper mold 21, and the diameter of guide post 1 51 is larger than that of guide post 2 52. The length of guide post 2 52 allows the connecting block 53 to just contact the bottom of the connecting plate 41 when the protrusion 22 moves out of the recessed groove 311. At the same time, when the upper mold 21 reaches its highest point, the abutment block 47 can completely push out the receiving plate 34 and the demolding ejector rod 33. The abutment block 47 has an inclined surface, so that the linkage rod 43 can be pushed out when moving. Guide post 1 51 and guide post 2 52 are connected by threads. The docking slip ring 54 only contacts the connecting plate 41 when the upper mold 21 moves down to one-third of the total length of guide post 1 51 and guide post 2 52. The docking slip ring 54, together with the elastic element 55, is mainly used to delay the pushing of the connecting plate 41.

[0050] In a further embodiment, a recessed groove 311 is provided above the lower mold plate 31, and the ejector pin 33 passes through the bottom surface of the recessed groove 311 and is fixedly connected to the receiving plate 34.

[0051] In this embodiment, the lower mold plate 31 and the base plate 32 are provided with mounting holes, so that they can be fixed by bolt connection; the bottom end of the demolding ejector rod 33 is provided with threads so that it can be connected to the receiving plate 34, thereby facilitating installation, disassembly and maintenance.

[0052] In a further embodiment, a protrusion 22 is provided below the upper mold 21, the protrusion 22 fits into the recessed groove 311, the insert rods 24 are evenly distributed around the upper part of the demolding ring 23, and the insert rods 24 are inserted into the lower part of the upper mold 21. A spring 25 is provided around the outside of the insert rods 24, and the demolding ring 23 is located around the protrusion 22.

[0053] In this embodiment, after the workpiece is stamped, part of the workpiece will be adsorbed on the periphery of the protrusion 22, and the demolding ring 23 can remove the workpiece by the rebound of the spring 25. This is the prior art and will not be described in detail.

[0054] The working principle of this utility model is as follows:

[0055] When the electric hydraulic cylinder 14 operates, causing the upper mold mechanism 2 to move downward as a whole, the demolding ring 23 will first contact the surface of the lower mold plate 31 and then compress the spring 25. After that, the protrusion 22 will be inserted into the interior of the recessed groove 311, and the demolding ejector rod 33 in the recessed groove 311 will also move downward until the top of the demolding ejector rod 33 is flush with the bottom surface of the recessed groove 311. At this time, the workpiece can be stamped and formed. After completion, after the upper mold 21 moves upward a certain distance, the demolding ejector rod 33 will be lifted by the cooperation of the guide mechanism 5 and the transmission mechanism 4, thereby allowing the workpiece to leave the interior of the recessed groove 311 and complete the demolding.

[0056] In the cooperation of the above-mentioned guide mechanism 5 and transmission mechanism 4, when the upper mold 21 moves down, it will drive the guide mechanism 5 to move down as a whole. During the downward movement, the docking slip ring 54 will first contact the upper part of the connecting plate 41, and as it continues to move down, the elastic element 55 will be compressed. When the elastic element 55 can no longer be compressed, it will drive the connecting plate 41, the linkage rod 43 and the piston 44 to move down. This will cause the hydraulic cylinder 42 to draw hydraulic oil from the hydraulic cylinder 45 through the connecting pipe 49, which will then cause the entire abutment 47, push rod 46 and piston 48 to move and retract to one side of the hydraulic cylinder 45, so that the abutment 47 no longer supports the receiving plate. 34 and demolding ejector 33. At this time, after the protrusion 22 enters the recessed groove 311, it can press down the demolding ejector 33. Conversely, when the upper mold 21 moves up a certain distance, the connecting block 53 will lift the connecting plate 41, thereby causing the connecting plate 41, the linkage rod 43 and the piston 44 to move up. This allows the hydraulic oil in the piston 44 to enter the interior of the hydraulic cylinder 45 through the connecting pipe 49. This causes the abutment 47, the push rod 46 and the piston 48 to move away from the hydraulic cylinder 45. As a result, the abutment 47 will lift the receiving plate 34 and the demolding ejector 33. In this way, the molded workpiece can be demolded without the use of a return spring, thus extending the maintenance cycle.

[0057] During the process of 34 and 33 being lifted by 47, since 4 is distributed symmetrically on both sides of 31 with the center of 31, a force can be applied evenly to 34 during the lifting process, thus making it more stable when lifting 33.

[0058] In addition, since 47, 46 and 48 are slidably connected inside 32, and 32 is bolted to the bottom of 31, installation and maintenance are more convenient.

[0059] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A stamping die that facilitates demolding, comprising a support frame mechanism (1), an upper die mechanism (2), and a lower die plate (31), characterized in that, The support frame mechanism (1) includes a top plate (11) and a bottom plate (13). The upper mold mechanism (2) and the lower mold plate (31) are distributed vertically and located between the top plate (11) and the bottom plate (13). The upper mold mechanism (2) and the lower mold plate (31) are provided with a transmission mechanism (4) and a guide mechanism (5) on both sides. The lower mold mechanism (3) is provided below the lower mold plate (31). The upper mold mechanism (2) includes an upper mold (21), a demolding pressure ring (23), and an insert rod (24). The lower mold mechanism (3) includes a base plate (32) and a demolding ejector pin (33). The base plate (32) has a recessed groove (36) at the demolding ejector pin (33). The recessed groove (36) has sliding grooves (37) on both sides, and the sliding grooves (37) on both sides are centrally symmetrical. The transmission mechanism (4) includes a connecting plate (41), a hydraulic cylinder one (42), a hydraulic cylinder two (45) and a push rod (46). The push rod (46) is inserted into both sides of the chassis (32) and one end is located inside the slide groove (37). The two ends of the push rod (46) are respectively fixedly connected to the abutment (47) and the piston two (48). The guiding mechanism (5) includes a guide post one (51) and a guide post two (52) fixedly connected at the top and bottom, and a docking slip ring (54) sleeved around the guide post two (52). The guide post one (51) passes through the top plate (11).

2. The stamping die for easy demolding according to claim 1, characterized in that: The connecting plate (41) is penetrated by a hydraulic cylinder (42). There are two hydraulic cylinders (42) located above the connecting plate (41) and the hydraulic cylinders (42) are installed below the top plate (11).

3. A stamping die for easy demolding according to claim 1, characterized in that: The lower end of the hydraulic cylinder (42) is connected to a linkage rod (43), the lower end of the linkage rod (43) is fixedly connected to the connecting plate (41), and the piston (44) is fixedly connected to one end of the linkage rod (43) inside the hydraulic cylinder (42).

4. A stamping die for easy demolding according to claim 1, characterized in that: The piston two (48) is slidably connected inside the hydraulic cylinder two (45), and the ports of the hydraulic cylinder one (42) and the hydraulic cylinder two (45) are connected by a connecting pipe (49).

5. A stamping die for easy demolding according to claim 1, characterized in that: A receiving plate (34) is fixedly connected to the lower part of the demolding ejector pin (33). The receiving plate (34) fits into the recessed groove (36). Springs (35) are provided on both sides below the receiving plate (34).

6. A stamping die for easy demolding according to claim 1, characterized in that: A connecting block (53) is fixedly connected below the second guide post (52), and the connecting block (53) is located below the connecting plate (41). The connecting block (53) is installed on the periphery of the upper mold (21). An elastic element (55) is fixedly connected above the sliding ring (54), and the elastic element (55) is sleeved on the periphery of the second guide post (52).

7. A stamping die for easy demolding according to claim 1, characterized in that: A recessed groove (311) is provided above the lower mold plate (31), and the demolding ejector rod (33) passes through the bottom surface of the recessed groove (311) and is fixedly connected to the receiving plate (34).

8. A stamping die for easy demolding according to claim 1, characterized in that: The upper mold (21) is provided with a protrusion (22) below, the protrusion (22) fits the recessed groove (311), the insert rod (24) is evenly distributed around the upper part of the demolding pressure ring (23), and the insert rod (24) is inserted into the lower part of the upper mold (21). A spring (25) is provided around the insert rod (24), and the demolding pressure ring (23) is located around the protrusion (22).

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