Explosive-charging pressing die set for annular shaped charge cutting bombs

Abstract

The utility model discloses a charging structure pressing die set for an annular shaped charge cutting bomb, which comprises a primary powder pressing die, a secondary powder pressing die and a demoulding die, and the primary powder pressing die consists of a powder pressing die cylinder, a powder pressing base, a primary powder pressing punch, a powder pressing block and a core rod; the secondary explosive pressing die is composed of an explosive pressing die barrel, a secondary explosive pressing punch, a primary explosive pressing punch, an explosive pressing block and a core rod. The demolding mold is composed of a secondary explosive pressing mold and a demolding cylinder. According to the explosive pressing die, positive and negative distribution explosive pressing is adopted, firstly, the primary explosive pressing punch is used for pressing the main explosive on the inner surface of the upper end of the shaped charge liner, then the explosive pressing base is detached, the secondary explosive pressing punch is installed to press the main explosive on the inner surface of the lower end of the shaped charge liner, and finally the annular explosive charging structure is withdrawn through the die withdrawing cylinder. By means of the structural design, pressing of the charging structure for annular cutting is achieved, charging quality is guaranteed, and process efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the oil and gas field downhole string stuck accident handling technical field relates to the production frock of the shaped charge, concretely relates to a kind of pressing die set of annular shaped charge charge BACKGROUND

[0002] In oil and gas field drilling and production operation, the conventional solution of pipe string stuck accident is to use annular shaped charge to realize the cutting of pipe string, and the annular charge structure is the core component of the shaped charge. The annular shaped charge structure is mainly composed of a shaped charge cup and a main explosive, wherein the shaped charge cup adopts a symmetrical split structure design, and the main explosive needs to be accurately pressed into the inner surface of the shaped charge cup by a special mold. The mechanism of the annular shaped charge is that the high-energy shock wave generated by the detonation of the main explosive collapses the metal shaped charge cup, forming a radial annular metal jet (speed up to 4000-5000 m / s), which realizes efficient cutting of the target pipe string.

[0003] For the pressing process of the annular charge structure, the existing mold cannot meet the pressing needs of the symmetrical shaped charge structure, which affects the charge quality and process efficiency. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a pressing die set for annular shaped charge charge, which solves the technical problem that the charge quality and process efficiency are affected due to the lack of pressing tool for annular charge structure in the prior art.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A pressing die set for annular shaped charge charge structure, comprising a primary pressing die, a secondary pressing die and a stripping die, the primary pressing die and the secondary pressing die are inverted in direction, and the secondary pressing die and the stripping die are consistent in direction. The primary pressing die is composed of a pressing die cylinder, a pressing die base, a primary pressing punch, a pressing block and a core rod. The secondary pressing die is composed of a pressing die cylinder, a secondary pressing punch, a primary pressing punch, a pressing block and a core rod. The stripping die is composed of a pressing die cylinder, a secondary pressing punch, a primary pressing punch, a pressing block, a core rod and a stripping cylinder.

[0007] The utility model also has the following technical features:

[0008] Specific, the primary pressure medicine mold includes pressure medicine mold cylinder, the axial both ends of pressure medicine mold cylinder are open, the axial one end of pressure medicine mold cylinder is provided with pressure medicine base, the axial other end of pressure medicine mold cylinder is provided with primary pressure medicine punch;The center of pressure medicine base and primary pressure medicine punch is provided with center hole, and the center hole of pressure medicine base and primary pressure medicine punch is provided with core rod;The inside of the middle position of pressure medicine mold is provided with medicine cover, and a pair of pressure medicine blocks are arranged between medicine cover and pressure medicine mold, and the pair of pressure medicine blocks are oppositely arranged with the central axis of pressure medicine mold as the axis of symmetry, and the radial inner side of pressure medicine block is in contact with the radial outer side of medicine cover;The axial both ends of medicine cover are open;The axial one end of medicine cover is inserted into the axial one end of pressure medicine base, and the axial other end of medicine cover is in contact with the end face of the axial one end of primary pressure medicine punch;The space surrounded by medicine cover, core rod, pressure medicine base and primary pressure medicine punch is primary pressure medicine cavity, and the first part of main explosive is filled in primary pressure medicine cavity;

[0009] Specific, the primary pressure medicine mold includes pressure medicine mold cylinder, the axial both ends of pressure medicine mold cylinder are open, the axial one end of pressure medicine mold cylinder is provided with pressure medicine base, the axial other end of pressure medicine mold cylinder is provided with primary pressure medicine punch;The center of pressure medicine base and primary pressure medicine punch is provided with center hole, and the center hole of pressure medicine base and primary pressure medicine punch is provided with core rod;The inside of the middle position of pressure medicine mold is provided with medicine cover, and a pair of pressure medicine blocks are arranged between medicine cover and pressure medicine mold, and the pair of pressure medicine blocks are oppositely arranged with the central axis of pressure medicine mold as the axis of symmetry, and the radial inner side of pressure medicine block is in contact with the radial outer side of medicine cover;The axial both ends of medicine cover are open;The axial one end of medicine cover is inserted into the axial one end of pressure medicine base, and the axial other end of medicine cover is in contact with the end face of the axial one end of primary pressure medicine punch;The space surrounded by medicine cover, core rod, pressure medicine base and primary pressure medicine punch is primary pressure medicine cavity, and the first part of main explosive is filled in primary pressure medicine cavity;

[0010] Specific, the primary pressure medicine mold includes pressure medicine mold cylinder, the axial both ends of pressure medicine mold cylinder are open, the axial one end of pressure medicine mold cylinder is provided with pressure medicine base, the axial other end of pressure medicine mold cylinder is provided with primary pressure medicine punch;The center of pressure medicine base and primary pressure medicine punch is provided with center hole, and the center hole of pressure medicine base and primary pressure medicine punch is provided with core rod;The inside of the middle position of pressure medicine mold is provided with medicine cover, and a pair of pressure medicine blocks are arranged between medicine cover and pressure medicine mold, and the pair of pressure medicine blocks are oppositely arranged with the central axis of pressure medicine mold as the axis of symmetry, and the radial inner side of pressure medicine block is in contact with the radial outer side of medicine cover;The axial both ends of medicine cover are open;The axial one end of medicine cover is inserted into the axial one end of pressure medicine base, and the axial other end of medicine cover is in contact with the end face of the axial one end of primary pressure medicine punch;The space surrounded by medicine cover, core rod, pressure medicine base and primary pressure medicine punch is primary pressure medicine cavity, and the first part of main explosive is filled in primary pressure medicine cavity;

[0011] Compared with the prior art, the utility model has the following technical effects:

[0012] The medicine pressing die adopts positive and reverse distribution medicine pressing, the primary medicine pressing punch is used to press the main explosive on the inner surface of the upper end of the shaped case, the medicine pressing base is removed, the secondary medicine pressing punch is loaded to press the main explosive on the inner surface of the lower end of the shaped case, and finally the annular charge structure is taken out through the die withdrawing cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the medicine pressing die set for the annular shaped charge cutting bomb. Figure 1 (A) shows the structure of the primary medicine pressing die, (B) shows the structure of the secondary medicine pressing die, and (C) shows the structure of the die withdrawing die.

[0014] Figure 2 It is a structure schematic view of the medicine pressing cylinder.

[0015] Figure 3 It is a structure schematic view of the medicine pressing base.

[0016] Figure 4 It is a structure schematic view of the primary medicine pressing punch.

[0017] Figure 5 It is a structure schematic view of the core rod.

[0018] Figure 6 It is a structure schematic view of the medicine pressing block.

[0019] Figure 7 It is a structure schematic view of the secondary medicine pressing punch.

[0020] Figure 8 It is a structure schematic view of the die withdrawing cylinder.

[0021] The meanings of the numbers in the drawing are as follows: 1 is a medicine pressing cylinder, 2 is a medicine pressing base, 3 is a primary medicine pressing punch, 4 is a core rod, 5 is a medicine pressing block, 6 is a secondary medicine pressing punch, 7 is a die withdrawing cylinder, 8 is a shaped case, and 9 is a main explosive.

[0022] 101 is a first section of the medicine pressing cylinder, 102 is a second section of the medicine pressing cylinder, 103 is a third section of the medicine pressing cylinder, and 104 is a fourth section of the medicine pressing cylinder.

[0023] 201 is a first section of the medicine pressing base, 202 is a second section of the medicine pressing base, and 203 is a third section of the medicine pressing base.

[0024] 301 is a central small column of the primary medicine pressing punch, 302 is a main body of the primary medicine pressing punch, and 303 is a circular table of the primary medicine pressing punch.

[0025] 401 is a main body of the core rod, and 402 is an end head of the core rod.

[0026] 601 - secondary explosive pressing punch body, 602 - secondary explosive pressing punch center small column.

[0027] 701 - first section of the stripping cylinder, 702 - second section of the stripping cylinder, 703 - third section of the stripping cylinder.

[0028] The specific content of the utility model is further explained and described in detail in combination with the embodiments. DETAILED DESCRIPTION

[0029] It should be noted that all the components and main explosives used in the utility model, without special instructions, adopt the components and main explosives known in the art, for example: the shaped charge 8 adopts the conventional shaped charge known in the prior art. The main explosive 9 adopts the conventional main explosive known in the prior art, such as hexogen, octogen, etc.

[0030] It should be noted that in the utility model, the "axial one end" is in the same direction as the bottom end of the primary explosive pressing mold, and the "axial other end" is in the same direction as the top end of the primary explosive pressing mold. Since the direction of the secondary explosive pressing mold and the primary explosive pressing mold is reversed, the "axial one end" is in the same direction as the top end of the secondary explosive pressing mold, and the "axial other end" is in the same direction as the bottom end of the secondary explosive pressing mold.

[0031] According to the above technical solution, the specific embodiments of the utility model are given below. It should be noted that the utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical solution of the present application falls within the scope of protection of the utility model.

[0032] Embodiment:

[0033] This embodiment gives a kind of annular polyenergetic cutting bomb charge pressing mold group, as shown in Figure 1, including primary explosive pressing mold, secondary explosive pressing mold and stripping mold. Figure 1 As shown in Figure 1, the primary explosive pressing mold includes a first pressing mold body 1, a first pressing mold center small column 2 and a first pressing mold center column 3.

[0034] As shown in Figure 1, the secondary explosive pressing mold includes a second pressing mold body 4, a second pressing mold center small column 5 and a second pressing mold center column 6. Figure 1As shown in (A), the primary pressing mold includes a pressing cylinder 1, which is open at both axial ends. A pressing base 2 is provided inside one axial end of the pressing cylinder 1, and a primary pressing punch 3 is provided inside the other axial end of the pressing cylinder 1. A central hole is provided at the center of both the pressing base 2 and the primary pressing punch 3, and a core rod 4 is provided inside the central hole of both the pressing base 2 and the primary pressing punch 3. A shaped medicine cover 8 is provided inside the middle position of the pressing cylinder 1, and a pair of pressing cylinders are provided between the shaped medicine cover 8 and the pressing cylinder 1. Block 5, a pair of pressing blocks 5 are arranged opposite each other with the central axis of the pressing mold cylinder 1 as the axis of symmetry. The radial inner side of the pressing block 5 is in contact with the radial outer side of the shaped charge liner 8. Both axial ends of the shaped charge liner 8 are open. The pressing base 2 extends into one axial end of the shaped charge liner 8, and the other axial end of the shaped charge liner 8 is in contact with the end face of one axial end of the primary pressing punch 3. The space enclosed by the shaped charge liner 8, the core rod 4, the pressing base 2 and the primary pressing punch 3 is the primary pressing chamber, which is filled with the first part of the main explosive 9.

[0035] like Figure 1 (B) The secondary pressing mold includes a pressing cylinder 1, which is open at both axial ends. A secondary pressing punch 6 is installed inside one axial end of the pressing cylinder 1, and a primary pressing punch 3 is installed inside the other end of the pressing cylinder 1. A central hole is provided at the center of both the secondary pressing punch 6 and the primary pressing punch 3, and a core rod 4 is installed inside the central hole of both the secondary pressing punch 6 and the primary pressing punch 3. A shaped medicine cover 8 is installed inside the middle position of the pressing cylinder 1, and a pair of pressing blocks 5 are arranged between the shaped medicine cover 8 and the pressing cylinder 1. With the central axis of the pressing cylinder 1 as the axis of symmetry, the inner radial side of the pressing block 5 is in contact with the outer radial side of the shaped charge liner 8; both axial ends of the shaped charge liner 8 are open; the other axial end of the secondary pressing punch 6 is in contact with one axial end of the shaped charge liner 8, and the other axial end of the shaped charge liner 8 is in contact with the end face of one axial end of the primary pressing punch 3; the space enclosed by the shaped charge liner 8, the core rod 4, the secondary pressing punch 6 and the primary pressing punch 3 is the secondary pressing cavity, which is filled with the first part of the main explosive 9 and the second part of the main explosive 9.

[0036] like Figure 1 As shown in (C), the demolding mold includes a demolding cylinder 7, both ends of the demolding cylinder 7 are open in the axial direction, and a secondary pressing mold is provided in one axial end of the demolding cylinder 7; the pressing cylinder 1 of the secondary pressing mold is installed on one axial end of the demolding cylinder 7, and the primary pressing punch 3 of the secondary pressing mold extends into the demolding cylinder 7.

[0037] In this embodiment, the pressing die cylinder 1, the pressing base 2, the primary pressing punch 3, the pressing block 5 and the core rod 4 jointly constitute a primary pressing die; the pressing die cylinder 1, the secondary pressing punch 6, the primary pressing punch 3, the pressing block 5 and the core rod 4 jointly constitute a secondary pressing die; the pressing die cylinder 1, the secondary pressing punch 6, the primary pressing punch 3, the pressing block 5, the core rod 4 and the ejector cylinder 7 (i.e. the secondary pressing die and the ejector cylinder 7) jointly constitute an ejector die; the primary pressing die and the secondary pressing die are upside down in the direction, and the secondary pressing die and the ejector die are consistent in the direction. The final annular shaped charge for energy-gathering cutting ammunition is composed of the liner 8 and the primary explosive 9 pressed and formed.

[0038] As a specific scheme of this embodiment, as shown in the figure, Figure 2 the pressing die cylinder 1 comprises a first pressing die cylinder segment 101, a second pressing die cylinder segment 102, a third pressing die cylinder segment 103 and a fourth pressing die cylinder segment 104 which are integrally arranged; the end face of the axial one end of the fourth pressing die cylinder segment 104 is in contact with the pressing base 2.

[0039] As a specific scheme of this embodiment, as shown in the figure, Figure 2 the middle part of the second pressing die cylinder segment 102 is a ring-shaped cylindrical structure, the axial both ends of which are provided with shoulders, and the shoulder segment is a ring-shaped circular truncated cone structure; the first pressing die cylinder segment 101, the third pressing die cylinder segment 103 and the fourth pressing die cylinder segment 104 are all ring-shaped cylindrical structures; the outer diameter of the first pressing die cylinder segment 101 and the outer diameter of the third pressing die cylinder segment 103 are equal, and both are smaller than the outer diameter of the fourth pressing die cylinder segment 104; the outer diameter of the fourth pressing die cylinder segment 104 and the outer diameter of the middle part of the second pressing die cylinder segment 102 are equal.

[0040] As a specific scheme of this embodiment, as shown in the figure, Figure 3 the pressing base 2 comprises a first pressing base segment 201, a second pressing base segment 202 and a third pressing base segment 203 which are integrally arranged, and the third pressing base segment 203 is in contact with the end face of the axial one end of the pressing die cylinder 1.

[0041] As a specific scheme of this embodiment, as shown in the figure, Figure 3 the first pressing base segment 201 and the second pressing base segment 202 are both ring-shaped cylindrical structures; the third pressing base segment 203 is composed of a ring-shaped cylindrical structure and a ring-shaped circular truncated cone structure; the outer diameter of the first pressing base segment 201 is greater than the maximum outer diameter of the third pressing base segment 203, and the maximum outer diameter of the third pressing base segment 203 is greater than the outer diameter of the second pressing base segment 202.

[0042] As a specific scheme of this embodiment, as shown in the figure, Figure 4As shown in the figure, the primary pressing punch 3 comprises a primary pressing punch center small column 301, a primary pressing punch main body 302 and a primary pressing punch circular platform 303 which are integrally arranged; the primary pressing punch center small column 301 extends into the shell 8; and the end face of the axial one end of the primary pressing punch main body 302 is in contact with the axial other end of the shell 8.

[0043] As a specific scheme of the embodiment, as shown in the figure, Figure 4 As shown in the figure, the primary pressing punch center small column 301 and the primary pressing punch circular platform 303 are both annular cylindrical structures; the primary pressing punch main body 302 is a two-section annular cylindrical structure; the outer diameter of the primary pressing punch circular platform 303 is greater than the maximum outer diameter of the primary pressing punch main body 302; and the minimum outer diameter of the primary pressing punch main body 302 is much greater than the outer diameter of the primary pressing punch center small column 301.

[0044] As a specific scheme of the embodiment, as shown in the figure, Figure 5 As shown in the figure, the core rod 4 comprises a core rod main body 401, and the axial two ends of the core rod main body 401 are integrally provided with core rod end heads 402 respectively; the core rod main body 401 is a circular rod structure; and the core rod end heads 402 are hemispherical structures. In the embodiment, the design of the small two ends of the core rod 4 facilitates the insertion and extraction of the core rod 4 into and out of the central holes of the pressing base 2, the primary pressing punch 3 and the secondary pressing punch 6.

[0045] As a specific scheme of the embodiment, as shown in the figure, Figure 6 As shown in the figure, the pressing block 5 is shaped to match the shape of the shell 8; the shell 8 is a whole symmetrical structure and is composed of two hollow circular platforms arranged integrally, the diameter of the upper hollow circular platform gradually decreases from top to bottom, and the diameter of the lower hollow circular platform gradually increases from top to bottom; the pressing block 5 is a two-lobed symmetrical structure and is composed of a pair of half pressing blocks, the pair of half pressing blocks are arranged oppositely and are sleeved at the middle part of the shell 8, and the shapes of the half pressing blocks are completely the same; the half pressing block is a structure similar to a half circular ring, the axial two end faces of the half pressing block gradually shrink inward along the radial direction, the radial inner ends of the axial two end faces meet, and the circumferential two end faces of the half pressing block are triangular.

[0046] As a specific scheme of the embodiment, as shown in the figure, Figure 7 As shown in the figure, the secondary pressing punch 6 comprises a secondary pressing punch main body 601 and a secondary pressing punch center small column 602 which are integrally arranged; the secondary pressing punch center small column 602 extends into the shell 8, and the end face of the axial other end of the secondary pressing punch main body 601 is in contact with the axial one end of the shell 8.

[0047] As a specific scheme of the embodiment, as shown in the figure, Figure 7As shown, the secondary powder pressing punch body 601 is a two-section annular cylindrical structure; the secondary powder pressing punch center small column 602 is an annular cylindrical structure; the minimum outer diameter of the secondary powder pressing punch body 601 is much larger than the outer diameter of the secondary powder pressing punch center small column 602.

[0048] As a specific scheme of the embodiment, as shown in the figure, Figure 8 As shown, the ejection cylinder 7 comprises an integrally arranged ejection cylinder first section 701, an ejection cylinder second section 702 and an ejection cylinder third section 703, the other axial end of the powder pressing cylinder 1 is installed in the ejection cylinder first section 701, and the primary powder pressing punch 3 extends into the ejection cylinder first section 701.

[0049] As a specific scheme of the embodiment, as shown in the figure, Figure 8 As shown, the ejection cylinder first section 701 and the ejection cylinder third section 703 are both annular cylindrical structures; the middle part of the ejection cylinder second section 702 is an annular cylindrical structure, and the axial two ends are provided with shoulders, and the shoulder section is an annular frustum structure; the outer diameters of the ejection cylinder first section 701 and the ejection cylinder third section 703 are equal and larger than the outer diameter of the middle part of the ejection cylinder second section 702.

[0050] As a specific scheme of the embodiment, the maximum outer surface of the powder pressing base 2 and the inner surface of the powder pressing cylinder 1 are gap-fitted, the tolerance of the maximum outer surface of the powder pressing base 2 is ensured to be between -0.02mm and -0.06mm, and the tolerance of the inner surface of the powder pressing cylinder 1 is ensured to be between 0mm and 0.04mm.

[0051] As a specific scheme of the embodiment, the maximum outer surfaces of the primary powder pressing punch 3 and the secondary powder pressing punch 6 and the inner surface of the powder pressing cylinder 1 are gap-fitted, and the tolerance of the maximum outer surfaces of the primary powder pressing punch 3 and the secondary powder pressing punch 6 is ensured to be between -0.02mm and -0.06mm.

[0052] As a specific scheme of the embodiment, the outer surface of the powder pressing block 5 and the powder pressing cylinder 1 are gap-fitted; and the tolerance of the outer surface of the powder pressing block 5 is ensured to be between -0.02mm and -0.06mm.

[0053] The working process of the utility model is as follows:

[0054] First, clamp the two halves of the powder pressing block 5 at the middle position outside the shaped charge liner 8, and then place it on the upper end surface of the powder pressing base 2.

[0055] Second, the powder pressing block 5, the shaped charge liner 8 and the powder pressing base 2 are sleeved into the powder pressing cylinder 1 as a whole, and the lower end surface of the powder pressing cylinder 1 is seated at the step surface at the bottom of the powder pressing base 2.

[0056] Third, insert the core rod 4 into the center hole of the powder pressing base 2, and the bottom end of the core rod 4 is flush with the bottom surface of the powder pressing base 2.

[0057] Fourth, the first part of the main charge 9 poured into the end surface of the liner 8, and set into the first pressing punch 3, through the hydraulic press to complete the first pressing.

[0058] Fifth, after the pressing, the mold is inverted 180 degrees, the charge base 2 is removed, and the second part of the main charge 9 is poured into the lower end surface of the liner 8, and the second pressing punch 6 is set in, and the second pressing is completed through the oil press.

[0059] Sixth, after the pressing, the entire pressing mold is placed on the retreating mold cylinder 7 upper end step surface, and the pressed annular charge structure is withdrawn through the oil press.

Claims

1. A compression die set for a ring-shaped charge for a shaped charge, characterized by comprising: The application relates to a one-time pressing explosive mold, a secondary pressing explosive mold and a mold stripping mold. The one-time pressing explosive mold comprises a pressing explosive mold cylinder (1), the axial two ends of the pressing explosive mold cylinder (1) are open, a pressing explosive base (2) is arranged in the axial one end of the pressing explosive mold cylinder (1), and a one-time pressing explosive punch (3) is arranged in the axial other end of the pressing explosive mold cylinder (1); a center hole is formed in the center of the pressing explosive base (2) and the one-time pressing explosive punch (3), and a core rod (4) is arranged in the center hole of the pressing explosive base (2) and the one-time pressing explosive punch (3); a grain case (8) is arranged in the middle position of the pressing explosive mold cylinder (1), a pair of pressing blocks (5) are arranged between the grain case (8) and the pressing explosive mold cylinder (1), the pair of pressing blocks (5) are oppositely arranged with the middle axis of the pressing explosive mold cylinder (1) as the axis of symmetry, the radial inner side of the pressing block (5) is in contact with the radial outer side of the grain case (8); the pressing explosive base (2) extends into the axial one end of the grain case (8), and the axial other end of the grain case (8) is in contact with the end face of the axial one end of the one-time pressing explosive punch (3); the space formed by the grain case (8), the core rod (4), the pressing explosive base (2) and the one-time pressing explosive punch (3) is a one-time pressing explosive cavity, and the one-time pressing explosive cavity is filled with a first part of main loading explosives (9). The secondary pressing explosive mold comprises a pressing explosive mold cylinder (1), a secondary pressing explosive punch (6) is arranged in the axial one end of the pressing explosive mold cylinder (1), and a one-time pressing explosive punch (3) is arranged in the other end of the pressing explosive mold cylinder (1); a center hole is formed in the center of the secondary pressing explosive punch (6) and the one-time pressing explosive punch (3), and a core rod (4) is arranged in the center hole of the secondary pressing explosive punch (6) and the one-time pressing explosive punch (3); a grain case (8) and a pair of pressing blocks (5) are arranged in the middle position of the pressing explosive mold cylinder (1), and the arrangement mode is the same as that of the grain case (8) and the pressing blocks (5) in the one-time pressing explosive mold; the axial other end of the secondary pressing explosive punch (6) is in contact with the axial one end of the grain case (8); the space formed by the grain case (8), the core rod (4), the secondary pressing explosive punch (6) and the one-time pressing explosive punch (3) is a secondary pressing explosive cavity, and the secondary pressing explosive cavity is filled with a first part of main loading explosives (9) and a second part of main loading explosives (9). The mold stripping mold comprises a mold stripping cylinder (7), the axial two ends of the mold stripping cylinder (7) are open, a secondary pressing explosive mold is arranged in the axial one end of the mold stripping cylinder (7), the pressing explosive mold cylinder (1) of the secondary pressing explosive mold is arranged on the axial one end of the mold stripping cylinder (7), and the one-time pressing explosive punch (3) of the secondary pressing explosive mold extends into the inside of the mold stripping cylinder (7).

2. The press die set for a ring-shaped charge of a shaped charge according to Claim 1, wherein The pressing explosive mold cylinder (1) comprises a first pressing explosive mold cylinder section (101), a second pressing explosive mold cylinder section (102), a third pressing explosive mold cylinder section (103) and a fourth pressing explosive mold cylinder section (104) which are integrally arranged; the end face of the axial one end of the fourth pressing explosive mold cylinder section (104) is in contact with the pressing explosive base (2).

3. The press die set for a ring-shaped charge of a shaped charge according to Claim 1, wherein The pressing base (2) comprises a first segment (201), a second segment (202) and a third segment (203) of the pressing base, the third segment (203) is in contact with the end face of the axial one end of the pressing die (1).

4. The press die set for a ring-shaped charge of a shaped charge according to Claim 1, wherein The primary pressing punch (3) comprises a central small column (301), a main body (302) and a circular table (303) of the primary pressing punch, the central small column (301) is inserted into the shell (8), the end face of the axial one end of the main body (302) is in contact with the axial other end of the shell (8).

5. The press die set for a ring-shaped charge of a shaped charge according to Claim 1, wherein The core rod (4) comprises a main body (401), the axial two ends of the main body (401) are respectively provided with a core rod end (402).

6. The press die set for a ring-shaped charge of a shaped charge according to Claim 1, wherein The pressing block (5) is composed of a pair of half pressing blocks, the pair of half pressing blocks are oppositely arranged and sleeved in the middle part of the shell (8), and the shapes of the half pressing blocks are completely same; the axial two end faces of the half pressing block are gradually contracted in the radial direction, the radial inner ends of the axial two end faces are converged, and the circumferential two end faces of the half pressing block are triangular.

7. The press die set for a ring-shaped charge of a shaped charge according to Claim 1, wherein The secondary pressing punch (6) comprises a main body (601) and a central small column (602) of the secondary pressing punch, the central small column (602) is inserted into the shell (8), and the end face of the axial other end of the main body (601) is in contact with the axial one end of the shell (8).

8. The press die set for a ring-shaped charge of a shaped charge according to Claim 1, wherein The die withdrawal cylinder (7) comprises a first segment (701), a second segment (702) and a third segment (703) of the die withdrawal cylinder, the axial other end of the pressing die (1) is installed in the first segment (701), and the primary pressing punch (3) is inserted into the first segment (701).

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