A semi-prepared cartridge closure device

Abstract

The application discloses a semi-ready cartridge closing device, which is compact in structure and reasonable in layout. The original integrated closing die is split into a die and a die mounting piece, and the die can be simply and conveniently replaced by using a limiting tool, so that the die replacement efficiency and safety are improved. The problems of inconvenient die replacement, high labor intensity and low efficiency in the existing semi-ready cartridge assembly process are solved. The semi-ready cartridge closing device can be applied to the assembly processes of cartridges of various calibers or other similar products requiring closing.

Description

Technical Field

[0001] This invention relates to the field of ammunition assembly technology, and in particular to a semi-spare ammunition closing device with a mold that can be quickly replaced. Background Technology

[0002] In the assembly process of artillery shells, it is usually necessary to achieve the closing process between the projectile and the shell body. As artillery shells are now showing a trend of multiple varieties and small batches, higher requirements are placed on the flexibility of assembly equipment. In the existing technology, the working method is usually that the closing cone sleeve drives the closing mold assembly (the closing mold assembly consists of multiple closing molds and multiple radial compression springs, etc.) to close into place, and the closing mold assembly acts on the surface of the shell body to complete the closing action.

[0003] However, different types of ammunition require different closing mold components during the closing process. Since the closing mold components have many parts and large dimensions, disassembly and installation are quite troublesome, which not only increases labor intensity and reduces production efficiency but also poses certain dangers.

[0004] Therefore, how to provide a simple and convenient quick-change mold closing device is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, the present invention provides a semi-ready ammunition closing device to overcome or at least partially solve the above problems. It solves the problems of inconvenient mold replacement, high labor intensity, and low efficiency in the existing ammunition assembly process.

[0006] This invention provides the following solution:

[0007] A semi-ready ammunition retraction device, comprising:

[0008] The main drive unit includes an upper end cover, a lower end cover, a DW guide sleeve, a piston guide rod, a cylinder, a tapered sleeve, several mold mounting pieces, and several tapered molds. The cylinder is located between the upper and lower end covers, the tapered sleeve is disposed within the cylinder, and the DW guide sleeve is connected to the upper end cover. The piston guide rod passes through the upper end cover and is fixedly connected to the tapered sleeve. The inner side of the tapered sleeve has a flared structure with a diameter decreasing from bottom to top. Several mold mounting pieces are located inside the flared structure and are freely disposed between the lower end cover and the DW guide sleeve. After each mold mounting piece is tightly fitted, its outer surface forms a tapered surface structure with a diameter decreasing from bottom to top. A radial compression spring is disposed between two adjacent mold mounting pieces. A piston is disposed at the end of the piston guide rod away from the cylinder. The piston is connected to a hydraulic system to drive the tapered sleeve to move up and down, so that the tapered sleeve drives several mold mounting pieces to move radially to drive several tapered molds to open and close.

[0009] Each of the mold mounting segments is provided with a first countersunk hole extending radially and a second countersunk hole communicating with the first countersunk hole and extending axially; each of the closing molds is provided with a positioning shaft protruding from the outer side and extending radially; the plurality of closing molds are connected to the first countersunk holes of the plurality of mold mounting segments in a shaft-hole fit manner through their respective positioning shafts.

[0010] The positioning shaft can slide along the axial direction of the first countersunk hole; the local diameter of the positioning shaft shrinks inward to form a positioning groove; and an elastic ejector pin assembly is provided in the second countersunk hole.

[0011] When the closing mold is not subjected to an external force that restricts its radial opening, the front end of the elastic ejector assembly abuts against the positioning groove to provide axial pressure to the positioning shaft so that the positioning shaft is confined within the first countersunk hole.

[0012] When the closing mold is in a closed state and is subjected to an external force that restricts its radial opening, the elastic ejector assembly is compressed axially during the outward return process of the closing cone sleeve, so that the front end of the elastic ejector assembly disengages from the positioning groove and the positioning shaft disengages from the first countersunk hole.

[0013] Preferably, each of the closing molds is provided with a third countersunk hole that faces downward and extends axially; the third countersunk hole is used to connect with a pin of a limiting fixture when the closing molds are in a closed state, so that the limiting fixture provides an external force to the closing mold to restrict its radial opening.

[0014] Preferably, the elastic ejector pin assembly includes an ejector pin, a spring, and a clamping screw. The two ends of the spring are respectively connected to the ejector pin and the clamping screw, and the screw is connected to the second countersunk hole by a threaded connection.

[0015] Preferably, the upper end of the ejector pin is provided with a spherical structure.

[0016] Preferably, the upper end cover is provided with a displacement sensor, and the probe of the displacement sensor extends freely into the fourth countersunk hole of the tapered sleeve.

[0017] Preferably, it further includes a main frame unit, the main frame unit including a guide mechanism, the upper part of which is connected to a movable beam; the main drive unit is connected to the lower end of the movable beam.

[0018] Preferably, the system further includes a lifting drive unit, which is connected to the main frame unit and the moving beam respectively. The lifting drive unit is used to drive the moving beam and the main drive unit to move up and down along the guide mechanism.

[0019] Preferably, the main frame unit further includes an upper crossbeam and a lower crossbeam, and the guide mechanism includes a plurality of columns disposed between the upper crossbeam and the lower crossbeam.

[0020] Preferably, the lifting drive unit includes a plurality of lifting cylinders disposed between the lower crossbeam and the moving beam.

[0021] Preferably, a cartridge holder is provided on the upper part of the lower crossbeam, the cartridge holder being used to hold a semi-ready cartridge with the bullet tip facing upwards.

[0022] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0023] This application provides a semi-ready ammunition closing device with a compact structure and reasonable layout. By disassembling the original integrated closing mold into a separate structure consisting of the mold and the mold mounting piece, a limiting tooling can be used to achieve simple and convenient mold replacement, improving mold replacement efficiency and safety. This solves the problems of inconvenient mold replacement, high labor intensity, and low efficiency in the existing semi-ready ammunition assembly process. It can be applied to the assembly process of various caliber artillery shells or other similar products requiring closing.

[0024] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a semi-ready ammunition closing device provided in an embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of the main drive unit provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the radial compression spring position provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the connection between the closing mold and the mold mounting flap provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the limiting tooling provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram showing the positional relationship between the closing mold and the limiting fixture before or after installation, according to an embodiment of the present invention.

[0032] In the diagram: 1. Upper crossbeam; 2. Moving beam; 3. Main drive unit; 3. Upper end cover; 31. Lower end cover; 32. DW guide sleeve; 33. Piston guide rod; 34. Cylinder body; 35. Closing cone sleeve; 36. Fourth countersunk hole; 361. Mold mounting flap; 37. First countersunk hole; 3701. Second countersunk hole; 3702. Closing mold; 38. Positioning shaft; 3801. Third countersunk hole; 3802. Radial compression spring; 39. Elastic ejector assembly; 310. Ejector pin; 31001. Spring; 31002. Clamping screw; 31003. Displacement sensor; 311. Lifting cylinder; 4. Lower crossbeam; 5. Spring seat; 6. Column; 7. Half-spare spring to be closed; 8. Limiting fixture; 9. Pin; 91. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0034] See Figure 1 , Figure 2 , Figure 3 , Figure 4 This invention provides a semi-ready ammunition closing device, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the device may include:

[0035] The main drive unit 3 includes an upper end cover 31, a lower end cover 32, a DW guide sleeve 33, a piston guide rod 34, a cylinder body 35, a tapered sleeve 36, several mold mounting plates 37, and several tapered molds 38. The cylinder body 35 is located between the upper end cover 31 and the lower end cover 32. The tapered sleeve 36 is disposed inside the cylinder body 35. The DW guide sleeve 33 is connected to the upper end cover 31. The piston guide rod 34 passes through the upper end cover 31 and is fixedly connected to the tapered sleeve 36. The inner side of the tapered sleeve 36 has a flared structure with a diameter decreasing from bottom to top. The mold mounting petals 37 are all located inside the flared structure and are freely disposed between the lower end cover 32 and the DW guide sleeve 33; after each mold mounting petal 37 is tightly fitted, its outer surface forms a conical structure with a diameter decreasing from bottom to top; a radial compression spring 39 is disposed between two adjacent mold mounting petals 37; a piston is disposed at the end of the piston guide rod 34 away from the cylinder 35, and the piston is used to connect to the hydraulic system to drive the constricting cone sleeve 36 to move up and down, so that the constricting cone sleeve 36 drives several mold mounting petals 37 to move radially to drive several constricting molds 38 to open and close.

[0036] Each of the mold mounting segments 37 is provided with a first countersunk hole 3701 extending radially and a second countersunk hole 3702 communicating with the first countersunk hole 3701 and extending axially; each of the closing molds 38 is provided with a positioning shaft 3801 protruding from the outer side and extending radially; the plurality of closing molds 38 are connected to the first countersunk holes 3701 of the plurality of mold mounting segments 37 in a shaft-hole fit manner through their respective positioning shafts 3801.

[0037] The positioning shaft 3801 can slide along the axial direction of the first countersunk hole 3701; the local diameter of the positioning shaft 3801 shrinks inward to form a positioning groove; and an elastic ejector pin assembly 310 is provided in the second countersunk hole 3702.

[0038] When the closing mold 38 is not subjected to an external force that restricts its radial opening, the front end of the elastic ejector assembly 310 abuts against the positioning groove to provide axial pressure to the positioning shaft 3801 so that the positioning shaft 3801 is confined within the first countersunk hole 3701.

[0039] When the closing mold 38 is closed and subjected to an external force that restricts its radial opening, the elastic ejector assembly 310 is compressed axially during the outward return of the closing cone sleeve, so that the front end of the elastic ejector assembly 310 disengages from the positioning groove and the positioning shaft 3801 disengages from the first countersunk hole 3701.

[0040] The semi-ready ammunition closing device provided in this application embodiment can realize the closing action of the projectile and cartridge case of the semi-ready ammunition through the main drive unit 3. The closing cone sleeve 36 can move up and down under the drive of the piston guide rod 34. Since the closing cone sleeve 36 and the mold mounting petal 37 are connected by a cone-shaped fit, and the mold mounting petal 37 can only move radially under the limiting action of the upper and lower cover plates, the cone surface structure of the mold mounting petal 37 can move radially after being pressured by the closing cone sleeve 36. During the radial movement of the mold mounting petal 37, the closing mold 38 can be driven to retract radially inward to complete the closing of the semi-ready ammunition located inside the closing mold 38.

[0041] Meanwhile, since the closing mold 38 and the mold mounting petal 37 are connected by a shaft-hole fit, when the closing mold 38 is not subjected to an external force that restricts its radial opening, the front end of the elastic ejector assembly 310 abuts against the positioning groove, ensuring that the closing mold 38 is always connected to the mold mounting petal 37. When the closing mold 38 is subjected to an external force that restricts its radial opening, the elastic ejector assembly 310 is compressed axially, and the front end of the elastic ejector assembly 310 disengages from the positioning groove, causing the positioning shaft 3801 to disengage from the first countersunk hole 3701. This separates the closing mold 38 from the mold mounting petal 37, allowing several closing molds 38 to be quickly removed from the inside of the mold mounting petal 37.

[0042] To facilitate providing a force to limit the radial opening of the plurality of closing molds 38, the embodiments of this application may also provide that each of the closing molds 38 is provided with a third countersunk hole 3802 with its opening facing downward and extending axially; the third countersunk hole 3802 is used to connect with the pin 91 of the limiting fixture 9 when the plurality of closing molds 38 are in the closed state, so that the limiting fixture 9 provides an external force to the closing mold 38 to limit its radial opening.

[0043] A dedicated limiting fixture 9 can be used to provide a force to restrict the radial opening of several closing molds 38. The number of pins 91 included in the limiting fixture 9 can be the same as the number of closing molds 38, and the distribution of each pin 91 can be the same as the distribution of the third countersunk holes 3802 included in the several closing molds 38 in the closed state. This allows the user to hold the handle of the limiting fixture 9 and insert each pin 91 into the corresponding third countersunk hole 3802 for picking up and putting down several closing molds 38.

[0044] The ejector pin assembly provided in this application embodiment is used to provide axial pressure for connecting the positioning shaft 3801 to the first countersunk hole 3701, and can be compressed so that the positioning shaft 3801 can enter the first countersunk hole 3701. In specific implementation, this application embodiment can provide the elastic ejector pin assembly 310 including an ejector pin 31001, a spring 31002 and a clamping screw 31003. The two ends of the spring 31002 are respectively connected to the ejector pin 31001 and the clamping screw 31003. The screw 31003 is connected to the second countersunk hole 3702 by a threaded connection.

[0045] To facilitate the insertion and exit of the ejector pin from the positioning groove, this embodiment of the application may also provide a spherical structure at the upper end of the ejector pin 31001. The upper end of the spherical structure contacts the positioning groove, ensuring radial pressure is provided to the positioning groove. Simultaneously, when the positioning shaft 3801 is withdrawn from the first countersunk hole 3701, the resistance between the ejector pin and the edge of the positioning groove is reduced, making it easier for the positioning shaft 3801 to be withdrawn.

[0046] Since the vertical movement distance of the closing cone sleeve 36 determines the inward closing distance of the closing mold 38, the closing mold 38 can be completely closed after the closing cone sleeve 36 moves downward a certain distance. To prevent the closing cone sleeve 36 from moving too downward and causing the closing mold 38 to be over-closed, it is necessary to detect the movement distance of the closing cone sleeve 36. In order to detect the vertical movement distance of the closing cone sleeve 36, this embodiment of the application can provide a displacement sensor 311 on the upper end cover 31, and the probe of the displacement sensor 311 extends freely into the fourth countersunk hole 361 of the closing cone sleeve 36.

[0047] It can be understood that the main drive unit 3 provided in this application embodiment is used to close the semi-spare ammunition located inside a plurality of closing molds 38, wherein the semi-spare ammunition can be supplied to the inside of the plurality of closing molds 38 by means of manual placement or other methods. In order to facilitate the placement of semi-spare ammunition, this application embodiment may also provide a main frame unit, the main frame unit including a guide mechanism, the upper part of the guide mechanism being connected to a movable beam 2; the main drive unit 3 is connected to the lower end of the movable beam 2.

[0048] Furthermore, embodiments of this application may also provide a lifting drive unit, which is connected to the main frame unit and the moving beam 2 respectively. The lifting drive unit is used to drive the moving beam 2 and the main drive unit 3 to move up and down reciprocally along the guide mechanism.

[0049] Specifically, the main frame unit also includes an upper crossbeam 1 and a lower crossbeam 5, and the guide mechanism includes a plurality of columns 7 disposed between the upper crossbeam 1 and the lower crossbeam 5.

[0050] The lifting drive unit includes a plurality of lifting cylinders 4 disposed between the lower crossbeam 5 and the moving beam 2.

[0051] The upper part of the lower crossbeam 5 is provided with a cartridge holder 6, which is used to place the semi-ready cartridge 8 with the bullet head facing upward.

[0052] The structure and usage of the device provided in the embodiments of this application will be described in detail below.

[0053] The closing mold 38 and the mold mounting petal 37 are located inside the cylinder 35 of the main drive unit 3. The hydraulic system provides power for the closing of the mold and the movement of the moving beam 2. The main drive unit 3 is mounted on the moving beam 2. The moving beam 2 is guided by the column 7 and connected to the lifting cylinder 4. The lifting cylinder 4 drives the moving beam 2 to move up and down.

[0054] The main drive unit 3 includes a piston guide rod 34, an upper end cover 31, a cylinder body 35, a tapered sleeve 36 (in this cylinder, the piston rod and the tapered sleeve 36 can be designed as an integral structure), an end cover, a mold mounting petal 37, a tapering mold 38, a DW guide sleeve 33, a displacement sensor 311, and a radial compression spring. The tapering mold 38 is installed in the elastic hole of the mold mounting petal 37 and connected to the tapering mold 38 via an ejector pin. The clamping screw can adjust the reliability of the connection of the tapering mold 38. The radial compression spring is placed between the two mold mounting petals 37. The displacement sensor 311 is used to monitor the position information of the tapered sleeve 36 in real time, i.e., the tapering depth of the tapering mold 38.

[0055] The specific workflow of the device provided in this application embodiment is as follows:

[0056] During the closing process, the hydraulic system provides power for the lifting cylinder 4 and the main cylinder. First, the moving beam 2 is in the highest position. After the closing half-spare cartridge 8 is placed on the cartridge seat 6, the lifting cylinder 4 drives the moving beam 2 to move downward into position. Then, the main drive unit 3 starts, and the piston guide rod 34 drives the closing cone sleeve 36 to move downward. The closing cone sleeve 36 acts on the mold mounting petal 37, and the mold mounting petal 37 drives the closing mold 38 to shrink inward. The closing mold 38 squeezes the surface of the half-spare cartridge, causing the shell to close inward. The position sensor provides real-time feedback on the position information of the closing cone sleeve 36, and stops after the closing depth is reached.

[0057] After the closing process is completed, the piston guide rod 34 drives the closing cone sleeve 36 to move upward. The closing cone sleeve 36 returns, and the mold mounting petals 37 open under the action of the radial compression spring. Each closing mold 38 separates from the semi-spare cartridge, completing the closing action. The lifting cylinder 4 drives the moving beam 2 to move upward into position. The user can then remove the closed semi-spare cartridge and reposition it to be assembled, repeating this process to achieve continuous closing of the semi-spare cartridges.

[0058] The schematic diagram of the connection structure between the mold mounting petal 37 and the closing mold 38 is shown below. Figure 4 As shown, the closing mold 38 is installed in the elastic hole of the mold mounting petal 37 and is connected to the closing mold 38 through the ejector pin. The tightening screw can adjust the connection reliability of the closing mold 38.

[0059] When changing molds, the equipment must be in an idle running state, and the limit fixture structure should be as follows: Figure 5 As shown. The main drive unit 3 is activated, and the piston guide rod 34 drives the closing cone sleeve 36 downwards. The closing cone sleeve 36 acts on the mold mounting petal 37, and the closing mold 38 begins to close. When the closing mold 38 is fully closed, the pins 91 of the limiting fixture 9 are aligned one by one with the end face holes (third countersunk hole 3802) on the mold and inserted. After the fixture is in place, the piston guide rod 34 drives the closing cone sleeve 36 upwards. The closing cone sleeve 36 returns, and the mold mounting petal 37 opens. Under the action of the fixture, each closing mold 38 cannot open normally and remains fully closed. The spring is compressed, the ejector pin retracts, and the closing mold 38 disengages from the elastic hole of the mold mounting petal 37, completing the mold disassembly.

[0060] When installing the mold, the limiting fixture 9 is also inserted into the end hole of the closing mold 38, such as... Figure 6 As shown, the closing mold 38 is then placed into the cavity of the mold mounting petal 37. The closing cone sleeve 36 is moved downwards in a jog, and the mold mounting petal 37 closes. At the same time, the closing mold 38 is shaken until it is stuck in the elastic hole. The shaking of the closing mold 38 is then stopped. After the mold mounting petal 37 is pressed tight, the tooling is removed, and the replacement of the closing mold 38 is completed.

[0061] In summary, the semi-ammunition retraction device provided in this application has a compact structure and a reasonable layout. By disassembling the original integrated retraction mold into a separate structure consisting of the mold and the mold mounting segment, the mold can be easily and conveniently replaced using limiting tooling, improving mold replacement efficiency and safety. This solves the problems of inconvenient mold replacement, high labor intensity, and low efficiency in the existing semi-ammunition assembly process. It can be applied to the assembly process of various caliber artillery shells or other similar products requiring retraction.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0064] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A semi-ready ammunition retraction device, characterized in that, include: The main drive unit includes an upper end cover, a lower end cover, a DW guide sleeve, a piston guide rod, a cylinder, a tapered sleeve, several mold mounting pieces, and several tapered molds. The cylinder is located between the upper and lower end covers, the tapered sleeve is disposed within the cylinder, and the DW guide sleeve is connected to the upper end cover. The piston guide rod passes through the upper end cover and is fixedly connected to the tapered sleeve. The inner side of the tapered sleeve has a flared structure with a diameter decreasing from bottom to top. Several mold mounting pieces are located inside the flared structure and are freely disposed between the lower end cover and the DW guide sleeve. After each mold mounting piece is tightly fitted, its outer surface forms a tapered surface structure with a diameter decreasing from bottom to top. A radial compression spring is disposed between two adjacent mold mounting pieces. A piston is disposed at the end of the piston guide rod away from the cylinder. The piston is connected to a hydraulic system to drive the tapered sleeve to move up and down, so that the tapered sleeve drives several mold mounting pieces to move radially to drive several tapered molds to open and close. Each of the mold mounting segments is provided with a first countersunk hole extending radially and a second countersunk hole communicating with the first countersunk hole and extending axially; each of the closing molds is provided with a positioning shaft protruding from the outer side and extending radially; the plurality of closing molds are connected to the first countersunk holes of the plurality of mold mounting segments in a shaft-hole fit manner through their respective positioning shafts. The positioning shaft can slide along the axial direction of the first countersunk hole; the local diameter of the positioning shaft shrinks inward to form a positioning groove; and an elastic ejector pin assembly is provided in the second countersunk hole. When the closing mold is not subjected to an external force that restricts its radial opening, the front end of the elastic ejector assembly abuts against the positioning groove to provide axial pressure to the positioning shaft so that the positioning shaft is confined within the first countersunk hole. When the closing mold is in a closed state and is subjected to an external force that restricts its radial opening, the elastic ejector assembly is compressed axially during the outward return process of the closing cone sleeve, so that the front end of the elastic ejector assembly disengages from the positioning groove and the positioning shaft disengages from the first countersunk hole.

2. The semi-ready ammunition closing device according to claim 1, characterized in that, Each of the closing molds is provided with a third countersunk hole that faces downward and extends axially; the third countersunk hole is used to connect with a pin of a limiting fixture when the closing molds are in a closed state, so that the limiting fixture provides an external force to the closing mold to restrict its radial opening.

3. The semi-ready ammunition closing device according to claim 1, characterized in that, The elastic ejector pin assembly includes an ejector pin, a spring, and a clamping screw. The two ends of the spring are respectively connected to the ejector pin and the clamping screw, and the screw is connected to the second countersunk hole by a threaded connection.

4. The semi-ready ammunition closing device according to claim 3, characterized in that, The upper end of the ejector pin is provided with a spherical structure.

5. The semi-ready ammunition closing device according to claim 1, characterized in that, The upper end cover is equipped with a displacement sensor, and the probe of the displacement sensor extends freely into the fourth countersunk hole of the tapered sleeve.

6. The semi-ready ammunition closing device according to claim 1, characterized in that, It also includes a main frame unit, which includes a guide mechanism, and a movable beam is connected to the upper part of the guide mechanism; the main drive unit is connected to the lower end of the movable beam.

7. The semi-ready ammunition closing device according to claim 6, characterized in that, It also includes a lifting drive unit, which is connected to the main frame unit and the moving beam respectively. The lifting drive unit is used to drive the moving beam and the main drive unit to move up and down along the guide mechanism.

8. The semi-ready ammunition closing device according to claim 7, characterized in that, The main frame unit also includes an upper crossbeam and a lower crossbeam, and the guide mechanism includes a number of columns disposed between the upper crossbeam and the lower crossbeam.

9. The semi-ready ammunition closing device according to claim 8, characterized in that, The lifting drive unit includes a plurality of lifting cylinders disposed between the lower crossbeam and the moving beam.

10. The semi-ready ammunition closing device according to claim 8, characterized in that, The upper part of the lower crossbeam is provided with a cartridge holder, which is used to place the semi-ready cartridge with the bullet head facing upwards.

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