A spherical product die forging device

Abstract

The utility model discloses a kind of spherical product die forging devices, it is related to metal plastic forming technical field.The device includes die, ejection mechanism, workbench, power actuator and idle stroke structure.Die is composed of upper die, middle die and bottom die, three form spherical cavity.Upper die connects power actuator, middle die is hysteresis linkage with idle stroke structure, the utility model discloses the die line at the die of middle die and upper die is equipped with overflow groove, and flash is generated on the equator of sphere.The utility model is designed by three division die and overflow groove, greatly reduces subsequent polishing workload, and using ejection mechanism and idle stroke structure, realizes safe, convenient stripping and taking, improves production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of metal plastic forming technology, and in particular to a die forging device for spherical products. Background Technology

[0002] In the metal forging industry, the mainstream hot die forging equipment for spheres generally adopts a two-part die structure, where each part of the die has a hemispherical cavity, which, when closed, forms a complete spherical cavity. This traditional two-part die structure has several inherent drawbacks: First, flash is generated at the maximum diameter of the sphere, i.e., the equator, which is the most noticeable location. It must be removed by an additional grinding or punching process, which not only increases production time and labor costs but may also damage the surface of the sphere during grinding, affecting the final roundness and quality of the product.

[0003] Secondly, the even distribution of flash at the equator means that all excess metal is wasted, and material utilization needs to be improved. Furthermore, during the die-cutting process, operators must place the high-temperature billet into the die cavity. The billet lacks effective support within the cavity and may slip or overturn, detaching from the die and posing a safety threat to personnel and equipment. After forging, the sphere often becomes stuck in the lower die cavity, making it difficult to remove quickly and safely. Operators typically need to use auxiliary tools to pry or knock it away, which is not only inefficient but also easily scratches the sphere's surface or damages the die.

[0004] While some attempts to use multi-cavity molds aim to improve efficiency, uneven metal flow can lead to inconsistent filling states in each cavity, affecting product quality. Furthermore, the complex demolding mechanism reduces the reliability of the equipment.

[0005] Therefore, there is an urgent need in this field for a new type of hot forging equipment that can fundamentally change the location of flash generation from the mold structure, thereby simplifying or even eliminating subsequent processing steps, while achieving safe and convenient part removal operations, and taking into account both operational safety and forming quality. Utility Model Content

[0006] To address the above technical problems, this utility model provides a spherical product forging device, comprising a power actuator and a mold mounted on a worktable, wherein the output end of the power actuator cooperates with the mold. The mold comprises an upper mold, a middle mold, and a bottom mold. The upper mold is mounted on the output end of the power actuator. The middle mold is linked to the power actuator via a lag linkage structure. The upper mold, middle mold, and bottom mold cooperate to form a spherical cavity. The middle mold has an overflow groove located at the parting line of the upper mold and the middle mold.

[0007] Furthermore, one end of the idle stroke structure is mounted on the power actuator, and the other end is movably connected to the middle mold, for use in the return stroke of the power actuator to separate the middle mold and the bottom mold.

[0008] Furthermore, the bottom mold includes a bottom mold body and an ejector head. The bottom mold body is provided with an ejector chamber, and the ejector head is located in the ejector chamber. The ejector head cooperates with the ejector mechanism for demolding spherical products.

[0009] Specifically, the ejection mechanism includes a connecting rod, a base, a contact head, and a pressing component. The base is mounted on the worktable, and the connecting rod is hinged to the base. One end of the connecting rod is provided with a pressing component, and the other end is provided with a contact head, which cooperates with the ejection head.

[0010] Specifically, the power actuator includes a hydraulic device, a spring, and a guide device. The guide device consists of a guide truss mounted on the workbench and a guide block slidably connected to the guide truss. The hydraulic device is mounted on the guide truss and its output end is connected to the guide block. The upper mold is mounted on the guide block, and the spring is sleeved outside the upper mold and mounted on the guide block.

[0011] To address the shortcomings of the prior art, this utility model achieves the following significant benefits through a three-part mold design and a pre-reserved overflow groove: By setting the overflow groove in the middle mold, the flash is generated above the equator of the sphere, which fundamentally reduces the subsequent polishing process and lowers processing costs and material waste.

[0012] Safe to operate and easy to remove parts: The unique three-part mold design provides an open space for safe placement of blanks; combined with the ejection mechanism, it further simplifies the demolding operation and improves work efficiency and safety.

[0013] Reliable operation and easy maintenance: The guide device and spring work together to effectively prevent sticking and ensure stable demolding and reliable operation; the idle stroke structure precisely controls the mold closing depth and ensures molding accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention in the mold-closed state; Figure 2 This is a schematic diagram of the structure of the present invention in the mold-opening state; Figure 3 This is a schematic diagram of the power actuator in this utility model; Figure 4 This is an exploded view of the mold used in this utility model; Figure 5 This is a cross-sectional view of the mold of this utility model in the mold-closed state; Figure 6This is a schematic diagram of the ejection mechanism in this utility model.

[0015] The attached figures are labeled as follows: 1. Mold; 11. Upper mold; 12. Middle mold; 13. Bottom mold; 14. Overflow groove; 15. Ejector head; 2. Ejection mechanism; 21. Contact head; 22. Connecting rod; 23. Base; 24. Pressing component; 3. Worktable; 4. Power actuator; 41. Spring; 42. Guide truss; 43. Guide block; 5. Idle structure. Detailed Implementation

[0016] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be noted that the embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model.

[0017] This utility model provides a spherical forging device, mainly used for forging metal spherical products (such as steel balls, copper balls, etc.). By optimizing the mold structure, this device effectively controls the formation position of flash, achieving efficient demolding of spherical products.

[0018] like Figures 1 to 6 As shown, the forging device includes a power actuator 4, a die 1, a worktable 3, and an ejection mechanism 2. The die 1 is set on the worktable 3, and the power actuator 4 is installed above the worktable 3, with its output end connected to the upper die 11 of the die 1 (the die 1 consists of an upper die 11, a middle die 12, and a bottom die 13).

[0019] In this embodiment, the power actuator 4 is a hydraulic press or a mechanical press, and the upper mold 11 is fixedly installed at the output end of the power actuator 4 by bolts.

[0020] like Figure 4 and Figure 5 As shown, the upper mold 11 has a spherical cavity at its bottom, and the middle mold 12 has a spherical cavity that mates with the upper mold 11. The spherical cavity and the spherical cavity form an upper hemispherical cavity. An overflow groove 14 is provided at the parting line of the upper mold 11 and the middle mold 12, and the upper hemispherical cavity of the overflow groove 14 is through it. The bottom mold 13 has a lower hemispherical cavity, which mates with the upper hemispherical cavity to form a spherical cavity. When the upper mold 11, the middle mold 12, and the bottom mold 13 are closed, they together form a complete spherical cavity to accommodate the metal blank.

[0021] like Figure 1 and Figure 2 As shown, the intermediate mold 12 is linked to the power actuator 4 by means of the idle structure 5. The idle structure 5 is hammer-shaped, with one end fixedly installed at the output end of the power actuator 4, and the other end of the hammer-shaped structure passes through the through hole of the intermediate mold 12 and interferes with it (the end of the idle structure 5 is larger than the through hole, and when it moves upward, it will drive the intermediate mold 12 upward).

[0022] When the power actuator 4 outputs (the output end moves downward), the upper die 11 and the middle die 12 move downward with the output end of the power actuator 4. After moving to a certain extent, the middle die 12 engages with the bottom die 13. After continuing to output, the upper die 11 extends into the middle die 12. After moving to a certain extent, the forging of the metal billet is completed.

[0023] During the mold closing process, the metal billet fills the spherical cavity, and the excess billet enters the overflow groove 14, causing the excess waste from the forging process to remain there as flash. By optimizing the mold structure, the flash is moved upward from its original equatorial position, fundamentally reducing subsequent grinding processes, lowering processing costs and material waste, and improving material utilization.

[0024] After forging is completed, the power actuator 4 returns to its original position. After a short idle stroke, the hammer-shaped structure of the idle stroke structure 5 drives the middle die 12 upward, separating it from the bottom die 13. At this time, the spherical product remains in the cavity of the bottom die 13.

[0025] like Figure 1 , Figure 5 and Figure 6 As shown, to facilitate the removal of spherical products, the bottom mold 13 has undergone structural improvements in this design. Specifically, the bottom mold 13 includes a bottom mold body and an ejector head 15. An ejector chamber is provided inside the bottom mold body, and the ejector chamber is in the shape of a stepped hole. The ejector head 15 is located inside the ejector chamber. The ejector head 15 cooperates with the ejection mechanism 2 to achieve demolding.

[0026] Specifically, such as Figure 6 As shown, the ejection mechanism 2 includes a connecting rod 22, a base 23, a contact head 21, and a pressing component 24. The base 23 is fixed below the worktable 3, and the connecting rod 22 is hinged to the base 23 in the middle. One end of the connecting rod 22 is connected to the pressing component 24, and the other end is provided with the contact head 21. When the pressing component 24 is driven, the connecting rod 22 pushes the contact head 21 upward, and the contact head 21 lifts the ejector head 15, thereby smoothly ejecting the spherical product from the bottom mold 13. The arc-shaped design of the contact head 21 avoids stress concentration and prevents damage to the product surface. In addition, when mechanical assistance is not used to remove the spherical product, the ejection mechanism 2 can also be designed with a transmission linkage. When the pedal connected to the pressing component 24 is stepped on, the operator can use pliers to remove the spherical product.

[0027] like Figure 3As shown, the power actuator 4 includes a hydraulic device, a spring 41, and a guide device. The guide device consists of a guide truss 42 mounted on the worktable 3 and a guide block 43 slidably connected to the guide truss 42. The hydraulic device is mounted on the guide truss 42, and its output end is connected to the guide block 43. The upper mold 11 is mounted on the guide block 43. This arrangement allows the output end of the actuator 4 to reciprocate smoothly along the axial direction of the guide column 14, which is beneficial for guiding the movement of the upper mold 11 and ensuring mold closing accuracy. The spring 41 is sleeved on the upper mold 11 and mounted on the guide block 43 to provide auxiliary pulling force when the upper mold 11 returns, ensuring that the upper mold 11 separates smoothly from the spherical product.

[0028] Based on the above structural description of the spherical product forging apparatus, a production step for spherical products is first provided: S1 Blank Placement: The cylindrical blank heated to 1100℃ is placed in the cavity formed by the bottom mold 13 and the middle mold 12. The cavity formed by the bottom mold 13 and the middle mold 12 is larger than the hemispherical cavity, and the blank is restrained by the middle mold 12 and will not tip over. It is safer than the traditional two-part mold. Operators can use clamps to safely place the high-temperature blank and effectively avoid the risk of burns.

[0029] S2 Mold Closure and Forging: The hydraulic device is activated, and the power actuator 4 drives the upper die 11 to move downward. In the initial stage, the idler structure 5 is not triggered, and the middle die 12 and the upper die 11 remain relatively stationary. After the middle die 12 engages with the bottom die 13, the idler structure 5 continues to descend with the power actuator 4. When the upper die 11 contacts the blank, it continues to press down to the predetermined position. At this time, the spherical cavity gradually closes, and the metal fills the cavity under pressure. Excess metal forms flash through the overflow groove 14. Since the overflow groove 14 is located above the equator of the sphere, the flash does not cover the maximum diameter of the sphere, significantly reducing the amount of subsequent grinding.

[0030] S3 Demolding and Part Removal: After forging, the hydraulic device returns, and spring 41 pushes the upper die 11 back to its original position quickly to prevent sticking. During the later stages of the return stroke, the idle stroke structure 5 pulls the middle die 12 upwards, separating it from the bottom die 13. At this point, the upper half of the ball and the flash are fully exposed. The operator uses the pressing component 24 to drive the contact head 21 via the connecting rod 22 to lift the ejector head 15, smoothly ejecting the ball from the bottom die 13.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spherical product forging apparatus, comprising a power actuator (4) and a die (1) mounted on a worktable (3), wherein the output end of the power actuator (4) cooperates with the die (1), characterized in that, The mold (1) includes an upper mold (11), a middle mold (12) and a bottom mold (13). The upper mold (11) is installed at the output end of the power actuator (4). The middle mold (12) is linked to the power actuator (4) with a lag through a free-stroke structure (5). The upper mold (11), the middle mold (12) and the bottom mold (13) cooperate to form a spherical cavity. The middle mold (12) is provided with an overflow groove located at the mold parting line of the upper mold (11) and the middle mold (12).

2. The spherical product forging apparatus according to claim 1, characterized in that, One end of the idle structure (5) is installed on the power actuator (4), and the other end is movably connected to the middle mold (12) for the power actuator (4) to separate the middle mold (12) and the bottom mold (13) during the return stroke.

3. The spherical product forging apparatus according to claim 1, characterized in that, The bottom mold (13) includes a bottom mold body and an ejector head (15). The bottom mold body is provided with an ejector chamber, and the ejector head (15) is located in the ejector chamber. The ejector head (15) cooperates with the ejector mechanism (2) for demolding spherical products.

4. The spherical product forging apparatus according to claim 3, characterized in that, The ejection mechanism (2) includes a connecting rod (22), a base (23), a contact head (21), and a pressing component (24). The base (23) is mounted on the workbench (3). The connecting rod (22) is hinged to the base (23). One end of the connecting rod (22) is provided with a pressing component (24), and the other end is provided with a contact head (21). The contact head (21) cooperates with the ejection head (15).

5. The spherical product forging apparatus according to claim 1, characterized in that, The power actuator (4) includes a hydraulic device, a spring (41) and a guide device. The guide device consists of a guide truss (42) set on the workbench (3) and a guide block (43) slidably connected to the guide truss (42). The hydraulic device is installed on the guide truss (42) and its output end is connected to the guide block (43). The upper mold (11) is installed on the guide block (43). The spring (41) is sleeved on the upper mold (11) and installed on the guide block (43).

Images