Spring-up knockout forging die

Abstract

The utility model belongs to the field of forging die, especially a spring upper ejection forging die, mainly used in spline sleeve forging piece cup shape in vehicle CVT gearbox. A spring upper ejection forging die, including upper die assembly, lower die assembly and elastic mechanism, the upper die assembly is installed on the lower die assembly, the elastic mechanism is embedded in the upper die assembly and sets up, the upper die assembly and the lower die assembly surround the forming chamber for forming product, and the elastic mechanism includes flat spring and upper ejector rod, and the upper ejector rod can be telescopic movement relative to the forming chamber, the utility model sets up the elastic mechanism and makes due to forging piece no longer sticks the upper die core, improves production efficiency, and improves the die life, eliminates the temperature rapid rise after the upper die core is stuck by the product, leads to the die annealing softening, scrapes and so on problem.

Description

Technical Field

[0001] This application relates to the field of forging die technology, and in particular to a spring ejection forging die. Background Technology

[0002] Forging dies are core process equipment in forging production. Without suitable forging dies, it is impossible to achieve mass production, high precision, and high performance of forgings, and their quality directly determines the usability of the forgings. Existing patent CN223369991U discloses a slanted ejector mechanism for injection molds. A fixed guide plate is fixedly installed on the inner side of the mold base, and an ejector plate located on the top surface of the fixed guide plate is slidably installed on the inner side of the mold base. A guide rod connected to the bottom surface of the mold is fixedly installed on the surface of the fixed guide plate, and the ejector plate is slidably sleeved on the surface of the guide rod. The bottom surface of the mold has an elastic reset rod connected to the surface of the ejector plate. Through the slanted sliding engagement structure of the fixed slant block and the sliding wedge block, the ejector plate is synchronously and horizontally lifted under the action of the drive rod, thereby causing several ejector rods to be ejected synchronously. However, this invention still suffers from low production efficiency, easy adhesion of the mold core to the product, short mold life, and rapid temperature rise after the upper mold core is stuck, leading to mold softening during annealing and affecting the performance. Summary of the Invention

[0003] This invention addresses the problems of low production efficiency, easy adhesion of products to the mold core, short mold life, and rapid temperature rise of the upper mold core after adhesion, leading to mold softening during annealing. It proposes a spring-loaded forging mold that improves production efficiency, prevents products from sticking to the upper mold core, and extends the mold's lifespan.

[0004] The above-mentioned technical problem of this utility model is solved by the following technical solution: a spring-loaded forging die, comprising an upper die assembly, a lower die assembly and an elastic mechanism, wherein the upper die assembly is mounted on the lower die assembly; the elastic mechanism is embedded in the upper die assembly, and the upper die assembly and the lower die assembly surround and form a forming cavity for forming a product; the elastic mechanism includes a flat wire spring and an upper ejector rod, the upper ejector rod being able to extend and retract relative to the forming cavity.

[0005] It should be noted that the lower die assembly is fixed on the worktable of the external press and remains stationary, while the upper die assembly is mounted on the slider of the external press and moves up and down with the slider to forge the spline sleeve forging. The external press is a publicly available extrusion device and is not shown in the accompanying drawings. The elastic mechanism is used to eject the spline sleeve forging and prevent the forging from sticking to the upper die assembly.

[0006] Preferably, the upper mold assembly includes an upper mold sleeve, an upper mold pad is embedded inside the upper mold sleeve, and an upper mold core is fixedly installed below the upper mold pad; the lower mold assembly includes a lower mold sleeve, a lower mold pad is embedded inside the lower mold sleeve, and a lower mold core is fixedly installed above the lower mold pad; the upper mold assembly is provided with an elastic mechanism.

[0007] By setting up upper and lower mold pads, the upper and lower mold cores can be well fixed and connected, making the mold more robust during operation. The upper and lower mold cores are compatible with each other and form a forming cavity, the shape of which is suitable for processing spline sleeve forgings in vehicle CVT transmissions.

[0008] Preferably, the elastic mechanism extends downward through the upper mold pad and the upper mold core; the lower mold pad has a lower ejector rod embedded in it, which extends from the lower mold core into the molding cavity.

[0009] By setting a lower ejector pin that passes through both the lower mold pad and the lower mold core and extends into the molding cavity, the product can be demolded from above by an external press pressing the lower ejector pin during the demolding process.

[0010] Preferably, the lower mold pad has a first countersunk hole inside, and the lower mold core has a first through hole inside, with the first countersunk hole and the first through hole being coaxially arranged; the lower ejector rod passes through the first countersunk hole and the first through hole, and the outer contours of the first countersunk hole and the first through hole are adapted to the outer contours of the lower ejector rod.

[0011] By setting a first countersunk hole and a first through hole that are compatible with the lower ejector pin, the lower ejector pin can slide freely within them, increasing the practicality of the mold.

[0012] Preferably, the elastic mechanism includes a flat wire spring and an upper ejector rod. A second countersunk hole is provided between the upper mold pad and the upper mold core, and the inner diameter of the second countersunk hole is adapted to the outer diameter of the flat wire spring. A second through hole is also provided in the upper mold core. The second countersunk hole and the second through hole are coaxially arranged, and the outer contour of the second through hole is adapted to the outer contour of the upper ejector rod.

[0013] By setting a second countersunk hole and a second through hole that are compatible with the upper push rod, the upper push rod can slide freely in them, allowing the flat wire spring to easily drive the upper push rod, thereby achieving the effect of opening the product.

[0014] Preferably, the upper ejector rod includes an ejector rod, a guide rod is installed above the ejector rod, a flange is provided between the guide rod and the ejector rod, and the outer contour of the flange is adapted to the outer contour of the second countersunk hole; the flat wire spring is sleeved and installed on the outer layer of the guide rod, one end of the flat wire spring abuts against the inner wall of the upper mold pad, and the other end of the flat wire spring abuts against the flange.

[0015] By setting guide rods, the flat wire spring can be effectively guided and will not deviate during processing; the two ends of the flat wire spring are restricted by the upper mold pad and flange, so the upper ejector rod will be in a stable state, improving efficiency during mold processing.

[0016] Preferably, the upper push rod is axially sliding up and down relative to the second countersunk hole; the inner diameter of the second countersunk hole is larger than the inner diameter of the second through hole.

[0017] By setting a flange that matches the second countersunk hole, and because the inner diameter of the second countersunk hole is larger than the inner diameter of the second through hole, the upper ejector rod will not extend too far when the flat wire spring releases its elasticity, thus eliminating the influence of the upper ejector rod on the material during mold processing.

[0018] In summary, this utility model has the following advantages compared with the prior art: 1. By setting an elastic mechanism, this utility model improves production efficiency and ensures a smooth production process because the forgings no longer stick to the mold core; 2. This utility model improves the mold life and eliminates problems such as rapid temperature rise after the upper mold core is stuck to the mold by the product, which leads to mold softening during annealing and scrapping. Attached Figure Description

[0019] Figure 1 This is a schematic cross-sectional view of the present invention; Figure 2 This is a schematic diagram of the interface when using this utility model.

[0020] The numbers in the diagram are as follows: 1. Upper mold assembly; 11. Upper mold sleeve; 12. Upper mold pad; 13. Upper mold core; 2. Lower mold assembly; 21. Lower mold sleeve; 22. Lower mold pad; 23. Lower mold core; 3. Elastic mechanism; 31. Flat wire spring; 32. Upper ejector rod; 321. Ejector rod; 322. Guide rod; 323. Flange; 33. Second countersunk hole; 34. Second through hole; 4. Lower ejector rod; 41. First countersunk hole; 42. First through hole. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 and Figure 2 As shown, this embodiment discloses a spring-loaded forging die, including an upper die assembly 1, a lower die assembly 2, and an elastic mechanism 3. The upper die assembly 1 is mounted on the lower die assembly 2. The elastic mechanism 3 is embedded in the upper die assembly 1. The upper die assembly 1 and the lower die assembly 2 surround and form a forming chamber for forming products. The elastic mechanism 3 includes a flat wire spring 31 and an upper ejector rod 32, which can extend and retract relative to the forming chamber.

[0023] The upper mold assembly 1 includes an upper mold sleeve 11, in which an upper mold pad 12 is embedded, and an upper mold core 13 is fixedly installed below the upper mold pad 12; the lower mold assembly 2 includes a lower mold sleeve 21, in which a lower mold pad 22 is embedded, and a lower mold core 23 is fixedly installed above the lower mold pad 22; the upper mold assembly 1 is provided with an elastic mechanism 3.

[0024] The elastic mechanism 3 is disposed downward through the upper mold pad 12 and the upper mold core 13; the lower mold pad 22 is embedded with a lower ejector rod 4, which extends from the lower mold core 23 into the molding cavity.

[0025] The lower mold pad 22 has a first countersunk hole 41 inside, and the lower mold core 23 has a first through hole 42 inside. The first countersunk hole 41 and the first through hole 42 are coaxially arranged. The lower ejector rod 4 passes through the first countersunk hole 41 and the first through hole 42. The outer contours of the first countersunk hole 41 and the first through hole 42 are adapted to the outer contours of the lower ejector rod 4.

[0026] The elastic mechanism 3 includes a flat wire spring 31 and an upper ejector rod 32. A second countersunk hole 33 is provided coaxially between the upper mold pad 12 and the upper mold core 13. The inner diameter of the second countersunk hole 33 is adapted to the outer diameter of the flat wire spring 31. A second through hole 34 is also provided in the upper mold core 13. The second countersunk hole 33 and the second through hole 34 are coaxially arranged. The outer contour of the second through hole 34 is adapted to the outer contour of the upper ejector rod 32.

[0027] The upper ejector rod 32 includes an ejector rod 321, and a guide rod 322 is installed above the ejector rod 321. A flange 323 is provided between the guide rod 322 and the ejector rod 321. The outer contour of the flange 323 is adapted to the outer contour of the second countersunk hole 33. The flat wire spring 31 is sleeved on the outer layer of the guide rod 322. One end of the flat wire spring 31 abuts against the inner wall of the upper mold pad 12, and the other end of the flat wire spring 31 abuts against the flange 323. The upper ejector rod 32 can slide up and down axially relative to the second countersunk hole 33. The inner diameter of the second countersunk hole 33 is larger than the inner diameter of the second through hole 34.

[0028] The specific operation process of this embodiment is as follows: the lower die assembly 2 is fixed on the worktable of the external press and remains stationary; the upper die assembly 1 is installed on the slider of the external press and moves up and down with the slider of the external press to forge the spline sleeve forging; the external press is a publicly available extrusion device, which is not shown in the accompanying drawings of the specification.

[0029] When the upper mold assembly 1 moves downward and does not contact the lower mold assembly 2, the flange 323 on the upper ejector rod 32 is elastically compressed by the flat wire spring 31, and the flange 323 abuts against the inner wall of the second countersunk hole 33. At this time, the upper ejector rod 32 is in a stable extended state. During the continuous downward movement of the upper mold assembly 1, the upper ejector rod 32 contacts the material. At this time, the flange 323 will leave the inner wall of the second countersunk hole 33, and the flat wire spring 31 will be further compressed. As the upper mold assembly 1 continues to move downward, the upper ejector rod 32 will continue to compress the flat wire spring 31. After molding is completed, the upper mold assembly 1 returns to its initial state. At this time, the elastic force of the flat wire spring 31 is released, thereby pushing the product away from the upper mold core 13 and preventing the product from sticking to the upper mold core 13. Finally, during demolding, the lower ejector rod 4 is pushed by an external press to eject the product out of the molding chamber.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A spring-ejecting forging die, comprising an upper die assembly (1), a lower die assembly (2), and an elastic mechanism (3), characterized in that, The upper mold assembly (1) is mounted on the lower mold assembly (2); the elastic mechanism (3) is embedded in the upper mold assembly (1), and the upper mold assembly (1) and the lower mold assembly (2) surround and form a molding cavity for molding products; the elastic mechanism (3) includes a flat wire spring (31) and an upper push rod (32), which can extend and retract relative to the molding cavity.

2. The spring ejector forging die according to claim 1, characterized in that, The upper mold assembly (1) includes an upper mold sleeve (11), an upper mold pad (12) is embedded inside the upper mold sleeve (11), and an upper mold core (13) is fixedly installed below the upper mold pad (12); the lower mold assembly (2) includes a lower mold sleeve (21), a lower mold pad (22) is embedded inside the lower mold sleeve (21), and a lower mold core (23) is fixedly installed above the lower mold pad (22); the upper mold assembly (1) is provided with an elastic mechanism (3).

3. The spring ejector forging die according to claim 2, characterized in that, The elastic mechanism (3) is disposed downward through the upper mold pad (12) and the upper mold core (13); the lower mold pad (22) is embedded with a lower ejector rod (4), which extends from the lower mold core (23) into the molding cavity.

4. The spring ejector forging die according to claim 3, characterized in that, The lower mold pad (22) has a first countersunk hole (41) inside, and the lower mold core (23) has a first through hole (42) inside. The first countersunk hole (41) and the first through hole (42) are coaxially arranged. The lower ejector rod (4) passes through the first countersunk hole (41) and the first through hole (42). The outer contours of the first countersunk hole (41) and the first through hole (42) are adapted to the outer contours of the lower ejector rod (4).

5. The spring ejector forging die according to claim 2, characterized in that, The elastic mechanism (3) includes a flat wire spring (31) and an upper ejector rod (32). A second countersunk hole (33) is provided between the upper mold pad (12) and the upper mold core (13) on the same axis. The inner diameter of the second countersunk hole (33) and the outer diameter of the flat wire spring (31) are adapted to each other. A second through hole (34) is also provided in the upper mold core (13). The second countersunk hole (33) and the second through hole (34) are coaxially arranged. The outer contour of the second through hole (34) is adapted to the outer contour of the upper ejector rod (32).

6. The spring ejector forging die according to claim 5, characterized in that, The upper ejector rod (32) includes an ejector rod (321), and a guide rod (322) is installed above the ejector rod (321). A flange (323) is provided between the guide rod (322) and the ejector rod (321). The outer contour of the flange (323) is adapted to the outer contour of the second countersunk hole (33). The flat wire spring (31) is sleeved and installed on the outer layer of the guide rod (322). One end of the flat wire spring (31) abuts against the inner wall of the upper mold pad (12), and the other end of the flat wire spring (31) abuts against the flange (323).

7. The spring ejector forging die according to claim 6, characterized in that, The upper push rod (32) can slide up and down axially relative to the second countersunk hole (33); the inner diameter of the second countersunk hole (33) is set to be larger than the inner diameter of the second through hole (34).

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