Die structure for pressing U-shaped grain

Abstract

According to the die structure for pressing the U-shaped grain, during charging, the grain is formed through two-time pressing (pre-pressing and pressing forming), and therefore the stability of the density and the size of the grain is guaranteed. A die structure for pressing a U-shaped grain comprises a gland I (1), a punch I (2), a punch II (3), a die cylinder (4), a base (5) and a gland II (6). In the pressing process, the gland I is replaced by the gland II, the gland II is provided with an annular groove matched with the punch II 3, the punch II extrudes the explosive of the annular part in the pressing process, the explosive of the annular part moves towards the bottom through sliding and translation, the density of the auxiliary grain is improved again, and the density of the annular part of the auxiliary grain is obviously improved. Therefore, the density of the annular part of the auxiliary grain is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of precision pressed medicine, and in particular relates to a method for forming a medicine column by pressing twice (pre-pressing and pressing into shape) when pressing a "U-shaped medicine column". Background Art

[0002] The main target of the armor-piercing warhead is the tank. In addition to requiring the projectile to have sufficient penetration ability, the jet is also required to have a corresponding aftereffect after penetrating the steel armor to destroy the internal structure of the tank, kill personnel, and eventually make the tank lose its combat effectiveness. In addition, the jet armor-piercing effect of the warhead is also required to be stable and have low sensitivity to various random factors. These performance requirements are related to the warhead structure, shooting conditions, etc. The charge structure of the warhead includes the type of charge, the shape and size of the charge column, and the configuration of the partition.

[0003] The pressing die structure of the auxiliary charge column ("U-shaped charge column") in the charge structure with a partition, during the conventional pressing process, adopts an existing punch to press. It often happens that the portion from the A end face of the auxiliary charge column to the bottom of the auxiliary charge column meets the requirements first, and the punch cannot continue to move downward, resulting in a very low density of the annular portion from the B end face to the A end face, which does not meet the design requirements, and the overall height of the auxiliary charge column is too high.

[0004] The utility model realizes the forming of the medicine column through two pressing steps (pre-pressing and pressing forming), thereby ensuring that the average density and size of the medicine column meet the design requirements. Utility Model Content

[0005] (1) Purpose of new technology:

[0006] The utility model provides a mold structure for pressing a U-shaped medicine column. When charging medicine, the medicine column is formed by pressing twice (pre-pressing and pressing to form), thereby ensuring the stability of the density and size of the medicine column.

[0007] (2) The purpose of the new method is achieved through the following technical solutions:

[0008] A mold structure for pressing a U-shaped drug column, characterized in that it comprises a pressure cap I1, a punch I2, a punch II3, a die barrel 4, a base 5, and a pressure cap II6; the outer diameter of the cylindrical part below the pressure cap I1 is clearance-matched with the inner diameter of the inner cavity of the punch I2; the punch I

[0009] 2 is a hollow cylindrical structure, the outer diameter of which is the same as the inner diameter of the auxiliary medicine column, and has a clearance match with the inner diameter of the punch II3; the punch II3 is a thick-walled barrel structure, the thickness of which is the same as the thickness of the annular part of the auxiliary medicine column, and the height is shorter than that of the punch I2, and the outer diameter of which is a clearance match with the inner diameter of the die barrel 4; the die barrel 4 is a thick-walled barrel structure, the inner diameter of which is the same as the maximum diameter of the auxiliary medicine column; the outer diameter of the cylindrical part below the pressure cap II6 has a clearance match with the inner diameter of the inner cavity of the punch I2; the lower surface of the pressure cap II6 has an annular groove; it cooperates with the punch I3.

[0010] Furthermore, the height of the groove of the pressure cap II6 is 0.6H, the inner diameter is larger than the outer diameter of the punch I2, and the outer diameter is the same as the outer diameter of the punch II3, and H is the height of the edge of the U-shaped drug column.

[0011] Furthermore, the inner diameter of the gland II is 2 mm larger than the outer diameter of the punch I2.

[0012] Furthermore, the total length of the punch I2 is 1.6H longer than the total length of the punch II3, where H is the height of the edge of the U-shaped charge column.

[0013] (3) Beneficial effects:

[0014] The utility model realizes the forming of the charge column by two pressings (pre-pressing and pressing forming), which solves the problem of low density of the annular part of the auxiliary charge column in one pressing forming. According to the test, the annular density of the auxiliary charge column (using poly-Ao-8 explosive) is increased from the original 1.76g / cm 3 Increased to 1.83g / cm 3 As above, the density is significantly improved and the size meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the drug column structure;

[0016] Figure 2 It is a schematic diagram of the pre-compression structure;

[0017] Figure 3 It is a schematic diagram of the pressing structure;

[0018] In the figure, 1-pressure cover I, 2-punch I, 3-punch II, 4-die cylinder, 5-base, 6-pressure cover II. DETAILED DESCRIPTION

[0019] The utility model is further described in conjunction with the accompanying drawings.

[0020] A mold structure for pressing a "U-shaped" drug column, comprising a pressure cap I1, a punch I2, a punch II3, a mold barrel 4, a base 5, and a pressure cap II6;

[0021] Among them, the pressure cover I1, the punch I2, the punch II3, the die barrel 4, and the base 5 form a pre-pressing die structure for pre-pressing. Among them, the punch I2, the punch II3, the die barrel 4, the base 5, and the pressure cover II6 form a pressing die structure for pressing.

[0022] The die barrel 4 is mounted on the base 5, and the explosive is located inside the die barrel. The punch II is located inside the die barrel 4, and the punch I2 is placed inside the punch II3; the pressure cap I1 is installed in the hole of the punch I2, and the pressure cap I1 can rotate freely, and the pre-pressing is started until the pre-pressing is completed, and the pressure cap I1 is removed, and the pressure cap II6 is installed in the hole of the punch I2, and the pressure cap II6 can rotate freely, and the pressing is started until the pressure is completed, and then the die is removed.

[0023] like Figure 2 The pre-pressing die structure comprises: a pressure cap I1, a punch I2, a punch II3, a die cylinder 4, and a base 5.

[0024] The outer diameter of the cylindrical part below the gland I1 forms a precise clearance fit with the inner diameter of the inner cavity of the punch I2, ensuring that the gland I1 will not move radially during the pressing process. The punch I2 is a hollow cylindrical structure, and its outer diameter is the same as the inner diameter of the inner cavity of the auxiliary medicine column, and forms a precise clearance fit with the inner diameter of the punch II3; the punch II3 is a thick-walled barrel structure, and its thickness is the same as the thickness of the annular part of the auxiliary medicine column, and its height is 1.6H shorter than that of the punch I2, and its outer diameter forms a precise clearance fit with the inner diameter of the die barrel 4. The die barrel 4 is a thick-walled barrel structure, and its inner diameter is the same as the maximum diameter of the auxiliary medicine column.

[0025] like Figure 3 The pressing die structure includes: a gland II6, a punch I2, a punch II3, a die barrel 4, and a base 5. The outer diameter of the cylindrical part below the gland II6 forms a clearance fit with the inner diameter of the inner cavity of the punch I2 to ensure that the gland II does not move radially during the pressing process. There is an annular groove on the lower surface of the gland II6 (the groove height is 0.6H, the inner diameter is 2mm larger than the outer diameter of the punch I2, and the outer diameter is the same as the outer diameter of the punch II3) that cooperates with the punch I3 to achieve that the punch II3 moves first during the pressing process, squeezes the annular part of the explosive, and increases the density of this part of the explosive.

[0026] The pressing process of the utility model adopts the constant pressure method (when the pressure of the press reaches the set value, the pressure no longer increases), and the weight of the explosive is fixed. The total length of the punch I2 is 1.6H longer than the total length of the punch II3 (it can be adjusted appropriately according to the height of H). During the pre-pressing, as the gland I1, the punch I2, and the punch II3 move downward, the explosives reduce the gaps between the explosives and redistribute the mass of the explosives by sliding and translating under the action of pressure. The density of the part from the end face of the auxiliary column A to the bottom of the auxiliary column gradually increases, and part of the explosives is squeezed to the annular part of the auxiliary column. However, since the part from the end face of the auxiliary column A to the bottom of the auxiliary column is subjected to greater force, the molding is faster, and the density increases rapidly. When the density of the part from the end face of the auxiliary column A to the bottom of the auxiliary column reaches the requirement, the density of the explosive in the annular part of the auxiliary column is low and cannot meet the use requirements.

[0027] During the pressing process, the pressure cap I1 is replaced with the pressure cap II6. The pressure cap II6 has an annular groove (groove height is 0.6H) and cooperates with the punch II3. During the pressing process, the punch II3 first moves downward to squeeze the annular part of the explosive. This part of the explosive moves toward the bottom through sliding and translation, so that the density of the auxiliary explosive column is increased again, which is mainly manifested in that the density of the annular part of the auxiliary explosive column is significantly increased, thereby ensuring the density of the annular part of the auxiliary explosive column. As the pressure cap II6 moves downward until the punch I2 fits, the size of the pressure cap II6, the punch I2, and the punch II3 cooperate to ensure the height of the annular part of the auxiliary explosive column, that is, to ensure the appearance size of the auxiliary explosive column.

[0028] according to Figure 2 Install the mold barrel 4 on the base 5, pour the loose explosives into the mold barrel, and spread the explosives flatly around the periphery, put the punch II3 into the mold barrel, and put the punch I2 into the punch II3; install the pressure cover I1 in the hole of the punch I2, the pressure cover I1 can rotate freely, start pre-pressing, until the pre-pressing is completed, remove the pressure cover I1, install the pressure cover II6 in the hole of the punch I2, the pressure cover II6 can rotate freely, start pressing, until the pressure holding is completed, and then withdraw the mold.

Claims

1. A mold structure for pressing a U-shaped drug column, characterized in that: It comprises a gland I (1), a punch I (2), a punch II (3), a die barrel (4), a base (5), and a gland II (6); The outer diameter of the cylindrical part below the pressure cap I (1) is in clearance with the inner diameter of the inner cavity of the punch I (2); the punch I (2) is a hollow cylindrical structure, the outer diameter of which is the same as the inner diameter of the inner cavity of the auxiliary charge column, and is in clearance with the inner diameter of the punch II (3); Punch II (3) is a thick-walled barrel structure, the thickness of which is the same as the thickness of the annular portion of the auxiliary charge, the height is shorter than punch I (2), and the outer diameter thereof is clearance-matched with the inner diameter of the die barrel (4); the die barrel (4) is a thick-walled barrel structure, the inner diameter of which is the same as the maximum diameter of the auxiliary charge; The outer diameter of the cylindrical part below the pressure cover II (6) is clearance-matched with the inner diameter of the inner cavity of the punch I (2); the lower surface of the pressure cover II (6) is provided with an annular groove, which is matched with the punch I (2).

2. A mold structure for pressing a U-shaped drug column according to claim 1, characterized in that: The groove height of the pressure cap II (6) is 0.6H, the inner diameter is larger than the outer diameter of the punch I (2), and the outer diameter is the same as the outer diameter of the punch II (3). H is the height of the edge of the U-shaped charge column.

3. A mold structure for pressing a U-shaped drug column according to claim 1, characterized in that: The inner diameter of the gland II is 2 mm larger than the outer diameter of the punch I (2).

4. A mold structure for pressing a U-shaped drug column according to claim 1, characterized in that: The total length of punch I (2) is 1.6H longer than that of punch II (3), where H is the height of the edge of the U-shaped charge column.

5. The mold structure for pressing a U-shaped drug column according to claim 1, characterized in that: The mold barrel (4) is mounted on a base (5), and the explosive is located inside the mold barrel.

6. The mold structure for pressing a U-shaped drug column according to claim 1, characterized in that: Punch II (3) is placed into the die barrel, and punch I (2) is placed into punch II (3).

7. The mold structure for pressing a U-shaped drug column according to claim 1, characterized in that: The pressure cover I (1) is installed in the hole of the punch I (2), and the pressure cover I (1) can rotate freely.

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