Fastener machining die based on metal additive manufacturing

Abstract

The fastener machining mold based on metal additive manufacturing comprises an upper mold body and a lower mold body which are designed in a split mode, and a first crown body cavity capable of forming the upper portion of a bolt blank crown body is formed in the center of the bottom of the upper mold body; a second crown body cavity capable of forming the lower part of the crown body of the bolt blank is formed in the center of the top of the first die body; the centers of the first die body, the second die body and the third die body are provided with containing holes which are communicated with one another and can contain a bolt blank rod body. A centering assembly is arranged in the second die body. A material returning assembly is arranged on the lower portion of the containing hole in the third die body. According to the automatic positioning device, the bolt blank and the axis of the die are automatically positioned before the bolt blank is subjected to punch forming, so that the quality of a finished product is guaranteed, and the automatic positioning device has the effects that modular quick-disassembly type combination design is achieved, all parts in the die are convenient to maintain and replace, and production and machining can be conducted in a metal additive manufacturing mode.

Description

Technical Field

[0001] This invention relates to the field of fastener processing mold technology, and in particular to a fastener processing mold based on metal additive manufacturing. Background Technology

[0002] In the bolt manufacturing industry, stamping technology is commonly used. Specifically, the stamping process uses stamping dies and equipment to apply strong pressure, causing plastic deformation at one end of the bolt blank, thereby transforming the blank into a bolt part with a predetermined shape, size, and performance. This process not only improves production efficiency but also reduces production costs. Traditional bolt molds are manufactured using cold forging, but this method is limited by forging processes and cutting tools, making it difficult to achieve complex cavities, irregular flow channels, and concave undercut structures. This limitation restricts its application to the production of bolt molds with complex internal structures. To address these issues, metal additive manufacturing (metal 3D printing) offers a better solution for producing and processing bolt molds with complex internal structures. Traditional cold forging requires material preparation, forging, rough or fine machining, heat treatment, polishing, and assembly, taking weeks to months. Metal additive manufacturing, on the other hand, transforms a 3D model into a finished product in just hours to days, eliminating many steps, resulting in a shorter production cycle and lower costs. Therefore, using metal additive manufacturing to produce bolt molds is currently the preferred solution, offering advantages such as design freedom, rapid delivery, low cost, and flexible customization. It is particularly suitable for new product development, small-batch customization, irregular bolts, and rapid trial production in the fastener industry. However, existing bolt molds have design shortcomings. First, the lower mold in existing bolt molds is mostly a one-piece molding design. Once the internal cavity is worn or the internal ejection mechanism used for demolding is damaged, the repair work is difficult, and usually the entire mold is discarded and a new mold is used. Second, the placement hole inside the lower mold is used to limit the bolt blank shank. The diameter of the placement hole is usually consistent with the diameter of the bolt blank. However, it is possible that the diameter of some bolt blanks may deviate, resulting in a large gap between the bolt blank and the hole wall when the bolt blank is placed inside the placement hole. This causes the axis of the bolt blank to be offset from the axis of the placement hole, resulting in an asymmetrical bolt crown after molding, which leads to the final product being unqualified and discarded. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fastener processing mold based on metal additive manufacturing. Before the bolt blank is stamped, the invention automatically positions the bolt blank and the axis of the mold to ensure the quality of the finished product. It also has a modular quick-release assembly design, which facilitates maintenance and replacement of various parts in the mold, and can be produced and processed by metal additive manufacturing.

[0004] This invention is achieved through the following technical solution: This invention discloses a fastener processing mold based on metal additive manufacturing, including a split upper mold and a lower mold. The upper mold has a first crown cavity at the center of its bottom, capable of forming the upper part of the bolt blank crown. The lower mold includes a first mold body, a second mold body, and a third mold body with the same diameter, arranged vertically. The first mold body has a second crown cavity at the center of its top, capable of forming the lower part of the bolt blank crown. The first mold body, the second mold body, and the third mold body have interconnected placement holes at their centers, capable of accommodating the bolt blank rod. The second mold body has a centering component inside, which controls the automatic positioning of the bolt blank axis with the placement hole axis. Both sides of the junction of the first mold body and the second mold body, and the second mold body and the third mold body, are provided with quick-release devices that can control the rapid connection or separation of the first mold body and the second mold body, as well as the second mold body and the third mold body. The lower part of the placement hole in the third mold body has a material ejection component that can automatically eject the formed bolt from the mold.

[0005] Furthermore, the centering component includes a centering ring. The second mold body has a through mounting port at its center, and the centering ring is located at the mounting port. The upper and lower ends of the centering ring are flush with the upper and lower ends of the mounting port. The outer side of the centering ring has several through grooves evenly distributed in a circle. A centering block is slidably connected to each through groove. The centering block can slide along the through groove about the central axis of the centering ring. The two sides of one end of the centering block abut against the end of the through groove near the center of the centering ring.

[0006] Furthermore, the outer side of the centering ring is provided with a first recessed portion that is recessed into the centering ring, and each centering block has a second recessed portion at its side end that is connected to the first recessed portion at both ends. O-rings are fitted at the first and second recessed portions. The shape of the end of the centering block near the center of the centering ring matches the outer shape of the bolt blank rod.

[0007] Furthermore, the outer side of the centering ring is slidably connected to the mounting port via a slider and a groove, and the centering ring can be detachably inserted into the mounting port of the second mold via the groove and the slider.

[0008] Furthermore, the top of the centering block is provided with a bevel at the end near the center of the centering ring, and the end of the centering block near the center of the centering ring is provided with several micro-balls spaced vertically and rotatingly.

[0009] Furthermore, the quick-release device includes a first connecting component and a second connecting component. A top-open connecting port is provided on one side of the top of the second mold body. The first connecting component is located on one side of the bottom of the first mold body, and the second connecting component is located at the bottom inside the connecting port. The first connecting component is located directly above the second connecting component and the two are mirror images of each other. The first connecting component and the second connecting component have the same structure.

[0010] Furthermore, the first connecting component includes a connecting box located at the bottom of the first mold body. A protrusion is provided on one side of the bottom of the connecting box, and an arc-shaped recess is provided at the side end of the protrusion. An opening is provided at the side end of the connecting box where the protrusion is not provided. A semi-circular locking block is provided inside the arc-shaped recess. One end of the semi-circular locking block is located inside the connecting box. A toggle lever is provided on one side of the semi-circular locking block, and an elastic strap is fitted between one side of the toggle lever and the inner side wall of the connecting box.

[0011] Furthermore, one side of the connecting box is provided with an opening to facilitate the passage and movement of one end of the toggle lever; the toggle lever in the first connecting assembly passes through the side end of the second mold body and is located outside the second mold body, and the side end of the second mold body is provided with an opening that communicates with the connecting port and facilitates the movement of the toggle lever, and the end of the toggle lever located outside the second mold body is provided with a toggle block.

[0012] Furthermore, the ejector assembly includes an ejector rod that is vertically slidably connected to a placement hole inside the third mold body. A spring is vertically installed inside the placement hole inside the third mold body. The bottom of the spring is connected to the bottom of the placement hole, and the top of the spring is connected to the bottom of the ejector rod. The top of the ejector rod is flush with the top of the third mold body.

[0013] Furthermore, the third module is split along the axis into a first shell and a second shell of the same size, and the joint between the first shell and the second shell is detachably connected by screws and threaded joints.

[0014] The present invention has the following advantages: (1) In this invention, when the bolt blank is vertically inserted into the placement hole of the lower mold, the centering component can automatically adjust the position of the bolt blank so that its axis corresponds to the axis of the placement hole. The centering component and the placement hole have a limiting effect on the bolt blank, preventing it from shifting during the stamping process. During the forming process, the centering component automatically positions the bolt blank, avoiding the problem of asymmetry of the bolt crown caused by the shift of the axis position due to the gap between the diameter of the bolt blank and the diameter of the placement hole. This effectively ensures the quality of the finished product after the bolt blank is formed and improves the product qualification rate.

[0015] (2) In this invention, the lower mold adopts a split quick-release assembly design. The lower mold is divided into a first mold body with a second crown cavity, a second mold body with a centering component, and a third mold body with a material ejection component. The three are detachably connected by a quick-release device. When the mold has been used for a long time, and it is necessary to maintain or replace the second crown cavity, the centering component, or the material ejection component, it is only necessary to control the corresponding mold body to disconnect the connection relationship through the corresponding quick-release device, so that the corresponding mold body can be removed and its internal components can be maintained or replaced. Unlike traditional one-piece molds that are difficult to repair, the maintainability of this mold is greatly improved, which saves the manufacturing cost of bolt molds to a certain extent and improves the service life of the mold. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the upper mold in this invention; Figure 3 This is a side sectional view of the upper mold in this invention; Figure 4 This is a three-dimensional structural diagram of the lower mold in this invention; Figure 5 This is a side sectional view of the lower mold in this invention; Figure 6 This is a three-dimensional structural diagram of the first module and the quick-release device in this invention; Figure 7 This is a side sectional view of the second model in this invention; Figure 8 This is a side view unfolded sectional view of the second module and centering component in this invention; Figure 9 This is a three-dimensional structural diagram of the centering component in this invention; Figure 10 This is a top view of the centering component in this invention; Figure 11 This is a schematic diagram of the unfolded structure of the centering component in this invention; Figure 12 This is a three-dimensional structural diagram of the centering block in this invention; Figure 13 This is a side sectional view of the quick-release device in this invention when it is connected; Figure 14 This is a side sectional view of the quick-release device in this invention when it is disassembled; Figure 15 These are side sectional views of the second and third phantoms in this invention; Figure 16 This is a three-dimensional structural diagram of the bolt blank and the formed bolt in this invention.

[0017] In the diagram: 1. Upper mold; 11. First crown cavity; 2. Lower mold; 21. First mold body; 211. Second crown cavity; 22. Second mold body; 23. Third mold body; 231. First shell; 232. Second shell; 3. Placement hole; 4. Centering assembly; 41. Centering ring; 42. Mounting port; 43. Through groove; 44. Centering block; 45. First recess; 46. Second recess; 47. O-ring; 48. Miniature ball bearing; 5. Quick release device; 51. First connecting assembly; 511. Connecting box; 512. Protrusion; 513. Arc-shaped recess; 514. Semi-circular locking block; 515. Actuating rod; 516. Elastic strap; 517. Actuating block; 52. Second connecting assembly; 6. Unloading assembly; 61. Unloading rod; 62. Spring. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. In the description of the present invention, words such as "front", "rear", "left", and "right" that indicate orientation or positional relationship are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limitations on the present invention. Example

[0019] Example 1 discloses a fastener processing mold based on metal additive manufacturing, such as Figures 1-16 As shown, the device includes a split upper mold 1 and a lower mold 2. The upper mold 1 has a first crown cavity 11 at the bottom center that can form the upper part of the bolt blank crown. The lower mold 2 includes a first mold body 21, a second mold body 22, and a third mold body 23 of the same diameter arranged vertically. The first mold body 21 has a second crown cavity 211 at the top center that can form the lower part of the bolt blank crown. The first mold body 21, the second mold body 22, and the third mold body 23 have interconnected spaces at their centers that can accommodate... The bolt blank rod has a placement hole 3; the second mold body 22 is equipped with a centering component 4 that controls the automatic positioning of the bolt blank axis and the placement hole 3 axis; both sides of the first mold body 21 and the second mold body 22 and the third mold body 23 are equipped with a quick-release device 5 that can control the quick connection or quick separation of the first mold body 21 and the second mold body 22 and the second mold body 22 and the third mold body 23; the lower part of the placement hole 3 in the third mold body 23 is equipped with a material ejection component 6 that can automatically eject the formed bolt from the mold.

[0020] Furthermore, in this embodiment, the centering component 4 includes a centering ring 41. The second mold body 22 has a vertically penetrating mounting port 42 at its center, and the centering ring 41 is located at the mounting port 42. The upper and lower ends of the centering ring 41 are flush with the upper and lower ends of the mounting port 42. The outer side of the centering ring 41 has a plurality of circularly distributed through grooves 43. Each through groove 43 is slidably connected to a centering block 44. The centering block 44 can slide along the through groove 43 with the central axis of the centering ring 41. The two sides of one end of the centering block 44 abut against the end of the through groove 43 near the center of the centering ring 41. Furthermore, the outer side of the centering ring 41 is provided with a first recessed portion 45 that is recessed into the centering ring 41, and each centering block 44 has a second recessed portion 46 at its side end that is connected to the first recessed portion 45 at both ends. An O-ring rubber ring 47 is fitted at the first recessed portion 45 and the second recessed portion 46. The shape of the end of the centering block 44 near the center of the centering ring 41 matches the shape of the outer side of the bolt blank. Furthermore, the outer side of the centering ring 41 is slidably connected to the mounting port 42 via a slider and a sliding groove, and the centering ring 41 can be detachably inserted into the mounting port 42 of the second mold body 22 via the sliding groove and the slider. Furthermore, the top of the centering block 44 is provided with a bevel at one end near the center of the centering ring 41, and the end of the centering block 44 near the center of the centering ring 41 is provided with a plurality of micro-balls 48 spaced vertically and rotatingly. like Figures 7 to 12 As shown, in this embodiment, in the initial state, the side ends of several centering blocks 44 protrude slightly from the inner surface of the centering ring 41, and the inner sides of several centering blocks 44 are arranged in a perfect circle with the center of the circle corresponding to the center of the centering ring 41. When the rod of the bolt blank is inserted into the centering ring 41, the outer side of the rod contacts the side ends of several centering blocks 44. The centering blocks 44 are first squeezed by the side ends of the rod, causing the O-ring rubber ring 47 to expand. Then the O-ring rubber ring 47 is reset, causing several centering blocks 44 to reset to the state where their inner center corresponds to the center of the centering ring 41. This finely adjusts the position of the bolt blank rod, so that the center of the rod corresponds to the center of the centering ring 41, thereby realizing automatic positioning of the bolt blank. This avoids the problem of asymmetry of the bolt crown after molding caused by the axial position offset due to the gap between the diameter of the bolt blank and the diameter of the placement hole 3, effectively ensuring the quality of the finished product after the bolt blank is molded and improving the product qualification rate. After long-term use, other components such as the O-ring 47 or centering block 44 may need maintenance or replacement. Since the centering ring 41 and the second mold 22 adopt a slot-type detachable design, simply push the centering ring 41 upward to separate the centering component 4 from the second mold 22, so as to facilitate maintenance or replacement of each component of the centering component 4. By setting the beveled edge of the arc surface at the top of each centering block 44, the resistance encountered by the bolt blank when it is inserted into the inner side of the centering blocks 44 is eliminated, making the process of it penetrating into the inner side of the centering blocks 44 smoother and more natural. At the same time, by designing several rotating micro-balls 48 on the contact surface between the centering block 44 and the bolt blank rod, the friction force when the rod slides along the side of the centering block 44 is reduced, so that the process of demolding the bolt blank through the ejector assembly 6 after processing is smoother and the problem of demolding jamming is avoided.

[0021] Furthermore, the quick-release device 5 includes a first connecting component 51 and a second connecting component 52. The top of the second mold 22 is provided with a top-open connecting port on one side. The first connecting component 51 is located on one side of the bottom of the first mold 21, and the second connecting component 52 is located at the bottom inside the connecting port. The first connecting component 51 is located directly above the second connecting component 52 and the two are mirror images of each other. The first connecting component 51 and the second connecting component 52 have the same structure. Furthermore, the first connecting component 51 includes a connecting box 511 located at the bottom of the first mold body 21. A protrusion 512 is provided on one side of the bottom of the connecting box 511. An arc-shaped recess 513 is provided on the side end of the protrusion 512. An opening is provided on the side end of the connecting box 511 where the protrusion 512 is not provided. A semi-circular locking block 514 is provided inside the arc-shaped recess 513. One end of the semi-circular locking block 514 is located inside the connecting box 511. A toggle lever 515 is provided on one side of the semi-circular locking block 514. An elastic strap 516 is sleeved between one side of the toggle lever 515 and the inner side wall of the connecting box 511. The connecting box 511 has an opening on one side to allow one end of the lever 515 to pass through and move; the lever 515 in the first connecting assembly 51 passes through the side of the second mold 22 and is located outside the second mold 22, and the side of the second mold 22 has an opening that communicates with the connecting port and allows the lever 515 to move, and the end of the lever 515 located outside the second mold 22 is provided with a lever block 517.

[0022] like Figures 13 to 15As shown, in this embodiment, the first module 21, the second module 22, and the third module 23 achieve modular and detachable quick connection and separation through the quick-release device 5. The specific working principle of the quick-release device 5 is as follows: In the initial state, the connecting boxes 511 in the first connecting assembly 51 and the second connecting assembly 52 are far apart. When connection is required, the first module 21 and the second module 22, or the second module 22 and the third module 23, are manually controlled to approach each other and complete docking. During the docking process, the connecting boxes 511 in the first connecting assembly 51 and the second connecting assembly 52 dock together to form a whole, and the protrusions 512 in both are inserted into the openings on the side ends of the connecting boxes 511 on the opposite side. The protrusions 512 compress the semi-circular locking blocks 514 on the opposite side, causing them to deflect to a completely horizontal state. Then, under the action of the elastic strap 516, they are reset to the initial state. At the initial angle, the two semi-circular locking blocks 514 abut against the arc-shaped recesses 513 inside the protrusions 512 on the opposite side, so that the two connecting boxes 511 are locked to each other, thereby connecting and locking the first mold body 21 and the second mold body 22 or the second mold body 22 and the third mold body 23. When it is necessary to disassemble the first mold body 21, the second mold body 22 or the third mold body 23, manually move the toggle blocks 517 on both sides of the corresponding quick-release device 5 to drive the semi-circular locking blocks 514 to deflect to a horizontal state to release the abutment state with the arc-shaped recesses 513, so that the first connecting component 51 and the second connecting component 52 are separated, thereby realizing the quick disassembly work. Unlike traditional one-piece molds that are difficult to repair, the maintainability of this mold is greatly improved, which saves the manufacturing cost of bolt molds to a certain extent and extends the service life of the mold.

[0023] Furthermore, the ejector assembly 6 includes an ejector rod 61 that is vertically slidably connected to the placement hole 3 inside the third mold body 23. A spring 62 is vertically provided inside the placement hole 3 inside the third mold body 23. The bottom of the spring 62 is connected to the bottom of the placement hole 3, and the top of the spring 62 is connected to the bottom of the ejector rod 61. The top of the ejector rod 61 is flush with the top of the third mold body 23. like Figure 15 As shown, in this embodiment, after the bolt blank is inserted into the placement hole 3 inside the first mold body 21 and the second mold body 22, the bottom of the bolt blank rod contacts the top of the ejector rod 61. When the upper mold 1 closes with the first mold body 21, the bolt blank is pressed down, which drives the ejector rod 61 to descend synchronously. The spring 62 contracts. After molding is completed, the upper mold 1 separates from the first mold body 21, the spring 62 loses pressure and extends to reset, which drives the ejector rod 61 to rise, thereby driving the bolt blank to rise automatically and completing the demolding work with the lower mold 2.

[0024] Furthermore, the third module 23 is split into a first shell 231 and a second shell 232 of the same size around the axis, and the joint between the first shell 231 and the second shell 232 is detachably connected by screws and threaded joints. like Figure 15 As shown, in this embodiment, the third mold body 23 is designed to be detachable via threaded holes and screws. When it is necessary to maintain or replace the ejector rod 61 and spring 62 inside the third mold body 23, the screws can be removed directly to disassemble and separate the third mold body 23, exposing the spring 62 and ejector rod 61 inside, which facilitates maintenance or replacement work and further improves the maintainability of this mold.

[0025] In this embodiment, during operation: the lower mold 2 is fixed to the base of the stamping device, and the upper mold 1 is located at the stamping end of the stamping device. The bolt blank is vertically inserted into the placement hole 3 of the lower mold 2. After placement, the centering component 4 can automatically adjust the position of the bolt blank so that its axis corresponds to the axis of the placement hole 3. The centering component 4 and the placement hole 3 cooperate to limit the bolt blank, preventing it from shifting during the stamping process. The stamping device controls the upper mold 1 to descend and close with the lower mold 2. With the cooperation of the first crown cavity 11 and the second crown cavity 211, the crown of the bolt blank is stamped and formed, so that the bolt blank is formed into a bolt. After stamping, the ejection component 6 works to push the formed bolt upward and demold it from the lower mold 2. The formed bolt can then be taken out, thus completing the work of stamping and forming the bolt blank through this mold. During the molding process, the centering component 4 automatically positions the bolt blank, avoiding the problem of asymmetry of the bolt crown caused by the offset of the axial position due to the gap between the diameter of the bolt blank and the diameter of the placement hole 3. This effectively ensures the quality of the finished product after the bolt blank is formed and improves the product qualification rate. The lower mold 2 in this device adopts a split quick-release assembly design. The lower mold 2 is divided into a first mold body 21 with a second crown cavity 211, a second mold body 22 with a centering component 4, and a third mold body 23 with a material ejection component 6. The three are detachably connected by a quick-release device 5. When the mold has been used for a long time and the second crown cavity 211, the centering component 4, or the material ejection component 6 needs to be maintained or replaced, it is only necessary to control the connection relationship of the corresponding mold body through the corresponding quick-release device 5 to remove the corresponding mold body and maintain or replace its internal components. Unlike traditional one-piece molding molds that are difficult to repair, the maintainability of this mold is greatly improved, which saves the manufacturing cost of bolt molds to a certain extent and extends the service life of the mold. The upper mold 1, first mold body 21, second mold body 22, and third mold body 23 in this mold can all be manufactured using metal additive manufacturing. Compared with the traditional cold forging process, the production cycle is shorter and it can be put into use more quickly. Traditional cold forging molds require material cutting, forging, rough or fine machining, heat treatment, polishing, and assembly, with a cycle of several weeks to several months. Metal additive manufacturing can take only a few hours to a few days from 3D model to finished product, saving many processes, resulting in a shorter production cycle and lower cost. Using metal additive manufacturing to produce bolt molds is the preferred bolt mold production solution today, with advantages such as design freedom, fast delivery, low cost, and flexible customization. It is particularly suitable for new product development, small batch customization, irregular bolts, and rapid trial production scenarios in the fastener industry.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fastener processing mold based on metal additive manufacturing, characterized in that, It includes a split upper mold (1) and a lower mold (2), wherein the upper mold (1) has a first crown cavity (11) at the bottom center that can form the upper part of the bolt blank crown. The lower mold (2) includes a first mold body (21), a second mold body (22) and a third mold body (23) with the same diameter arranged in an upper and lower combination. The first mold body (21) has a second crown cavity (211) at the top center that can form the lower part of the bolt blank crown body. The first mold (21), the second mold (22) and the third mold (23) are provided with interconnected placement holes (3) that can accommodate bolt blank rods at their centers; The second mold (22) is equipped with a centering component (4) that automatically positions the bolt blank shaft and the placement hole (3) shaft. A quick-release device (5) is provided on both sides of the combination of the first module (21) and the second module (22) with the second module (22) and the third module (23), which can control the quick connection or quick separation of the first module (21) and the second module (22) as well as the second module (22) and the third module (23); The lower part of the placement hole (3) in the third mold body (23) is provided with a material ejection component (6) that can automatically eject the molded bolts and demold them.

2. The fastener processing mold based on metal additive manufacturing as described in claim 1, characterized in that, The centering component (4) includes a centering ring (41). The second mold body (22) has a vertically penetrating mounting port (42) at its center, and the centering ring (41) is located at the mounting port (42). The upper and lower ends of the centering ring (41) are flush with the upper and lower ends of the mounting port (42). The outer side of the centering ring (41) is evenly distributed with several through grooves (43). Each through groove (43) is slidably connected to a centering block (44). The centering block (44) can slide along the through groove (43) with the central axis of the centering ring (41). The two sides of one end of the centering block (44) abut against the end of the through groove (43) near the center of the centering ring (41).

3. A fastener processing mold based on metal additive manufacturing as described in claim 2, characterized in that, The outer side of the centering ring (41) is provided with a first recess (45) that is recessed into the centering ring (41). Each centering block (44) has a second recess (46) at its side end that is connected to the first recess (45) at both ends. An O-ring (47) is fitted at the first recess (45) and the second recess (46). The shape of the end of the centering block (44) near the center of the centering ring (41) matches the shape of the outer side of the bolt blank rod.

4. A fastener processing mold based on metal additive manufacturing as described in claim 3, characterized in that, The outer side of the centering ring (41) is connected to the mounting port (42) by sliding block and slide groove, and the centering ring (41) can be detachably inserted into the mounting port (42) of the second mold body (22) by slide groove and slider.

5. A fastener processing mold based on metal additive manufacturing as described in claim 4, characterized in that, The centering block (44) has a beveled edge at one end near the center of the centering ring (41), and a number of miniature balls (48) are spaced vertically and rotated at the other end of the centering block (44) near the center of the centering ring (41).

6. A fastener processing mold based on metal additive manufacturing as described in claim 5, characterized in that, The quick-release device (5) includes a first connecting component (51) and a second connecting component (52). The top of the second mold (22) has an open connection port on one side. The first connecting component (51) is located on one side of the bottom of the first mold (21), and the second connecting component (52) is located at the bottom inside the connection port. The first connecting component (51) is located directly above the second connecting component (52) and the two are mirror images of each other. The first connecting component (51) and the second connecting component (52) have the same structure.

7. A fastener processing mold based on metal additive manufacturing as described in claim 6, characterized in that, The first connecting component (51) includes a connecting box (511) located at the bottom of the first mold body (21). A protrusion (512) is provided on one side of the bottom of the connecting box (511). An arc-shaped recess (513) is provided on the side end of the protrusion (512). An opening is provided on the side end of the connecting box (511) where the protrusion (512) is not provided. A semi-circular locking block (514) is provided inside the arc-shaped recess (513). One end of the semi-circular locking block (514) is located inside the connecting box (511). A toggle rod (515) is provided on one side of the semi-circular locking block (514). An elastic strap (516) is sleeved between one side of the toggle rod (515) and the inner side wall of the connecting box (511).

8. A fastener processing mold based on metal additive manufacturing as described in claim 7, characterized in that, The connecting box (511) has an opening on one side to allow one end of the lever (515) to pass through and move; the lever (515) in the first connecting assembly (51) passes through the side end of the second mold (22) and is located outside the second mold (22), and the side end of the second mold (22) has an opening that communicates with the connecting port and allows the lever (515) to move, and the end of the lever (515) located outside the second mold (22) has a lever block (517).

9. A fastener processing mold based on metal additive manufacturing as described in claim 8, characterized in that, The ejector assembly (6) includes an ejector rod (61) that is vertically slidably connected to the placement hole (3) inside the third mold body (23). A spring (62) is vertically provided inside the placement hole (3) inside the third mold body (23). The bottom of the spring (62) is connected to the bottom of the placement hole (3), and the top of the spring (62) is connected to the bottom of the ejector rod (61). The top of the ejector rod (61) is flush with the top of the third mold body (23).

10. A fastener processing mold based on metal additive manufacturing as described in claim 9, characterized in that, The third module (23) is split into a first shell (231) and a second shell (232) of the same size along the axis. The first shell (231) and the second shell (232) are detachably connected by screws and threaded joints.

Images