Synchronous spinning device for arc variable-wall-thickness shaped charge cover

Abstract

The utility model discloses a synchronous spinning device for an arc variable-wall-thickness shaped charge cover, which belongs to the technical field of shaped charge cover processing, comprises a sliding rod and a sliding sleeve movably arranged on the sliding rod, and is characterized in that the sliding rod comprises a bottom rod, a guide piece is arranged at the end part of the bottom rod, a mounting cavity with an opening is arranged at the end part of the guide piece, the sliding sleeve is sleeved on the outer wall of the guide piece, and the sliding sleeve is movably arranged on the bottom rod. An operation cavity matched with the outer wall of the guide part is formed in the sliding sleeve, a mandrel is arranged in the installation cavity, the working end of the mandrel extends into the operation cavity, a loading step is arranged at the end of the operation cavity, a loading groove is formed in the middle of the loading step, a copper plate is placed in the loading groove, and a through hole communicated with the operation cavity is formed in the middle of the loading groove. The problems that according to an existing mode of clamping a copper plate through a core shaft and a tail top of the explosive-shaped cover, the copper plate is prone to being jacked through after pressure is too large, and the copper plate is not firmly clamped and fixed when the pressure is too small are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medicine liner processing, and in particular relates to a synchronous spinning device for a circular arc variable wall thickness medicine liner. Background Art

[0002] With the continuous development of long-range detection fuzes, the range of tandem armor-piercing projectiles has been further improved, and the requirements for the power of the front-stage armor-piercing bullets of the ammunition have become higher and higher. At this time, the K-type charge structure was proposed to ensure the stability of the power of the front-stage shaped charge at 30 times the explosion height. In the K-type charge structure, the charge liner is the core part to achieve the power of the projectile, and it mostly adopts an arc variable wall thickness structure;

[0003] The existing processing method of the charge liner is generally a mandrel + tail top clamping copper plate method, but it has the following defects: (1) under the influence of the tail top pressure, the copper plate is easily penetrated when the pressure is too high, and the copper plate is not firmly clamped when the pressure is too low;

[0004] (2) Affected by the pressure of the tail top, the liner will form a circular plane after spinning, which will affect the subsequent processing and the power of the ammunition;

[0005] (3) Due to the influence of the clamping method, it is necessary to find the center and center of mass of the copper plate blank in advance. When the tail is working, it must be pressed exactly on the center and center of mass to prevent the blank from being thrown away during the high-speed rotation of the spinning machine. Utility Model Content

[0006] To solve the problems raised in the above background technology, the utility model provides a synchronous spinning device for arc variable wall thickness charge liner, which can fix the copper plate without tail top, and the arc top surface of the charge liner will not be flat after processing, but all are arc surface, and it is easy to install and has higher loading efficiency.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a synchronous spinning device for an arc variable wall thickness charge cap, comprising a slide rod and a slide sleeve movably arranged on the slide rod, characterized in that: the slide rod comprises a bottom rod, a guide piece is provided at the end of the bottom rod, a mounting cavity with an opening is provided at the end of the guide piece, a slide sleeve is provided on the outer wall of the guide piece, a running cavity matched with the outer wall of the guide piece is provided inside the slide sleeve, a core shaft is provided in the mounting cavity, and its working end extends into the running cavity, a loading step is provided at the end of the running cavity, a loading trough is provided in the middle of the loading step, a copper plate is placed in the loading trough, a through hole communicating with the running cavity is provided in the middle of the loading trough, a pressure cover is installed on the outer wall of the loading step, and a material exposure trough is provided in the middle of the pressure cover.

[0008] Preferably, the core shaft includes a mounting body installed in the mounting cavity, a limiting ring is provided at the end of the mounting body, a working head is provided at the end of the limiting ring, and the working head can pass through the through hole to contact the copper plate, and a process column is provided at one end of the mounting body away from the limiting ring.

[0009] Preferably, the guide member is provided with a keyway near the core shaft, and the process column extends into the keyway.

[0010] Preferably, a slide groove is provided on the side wall of the guide member, a threaded hole is provided on the side wall of the sliding sleeve, a limiting bolt is provided in the threaded hole and extends into the slide groove.

[0011] Preferably, round holes are provided at the corners of the charging trough.

[0012] Preferably, the gland is connected to the charging step via a thread, and the material exposure groove and the charging groove are offset by 45°.

[0013] Preferably, the side wall of the material exposure trough is provided with a wrench groove

[0014] Preferably, the mounting body is in the shape of a truncated cone.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The synchronous spinning device for arc variable wall thickness liner described in the utility model adopts a coaxial fixing method to force the spinning material and the mandrel to rotate synchronously. It can be used for the three main shaft gears of the spinning machine, namely low, medium and high, and can shorten the time from starting to high speed gear of the main shaft of the spinning lathe, avoiding the phenomenon of not sticking to the mold and large wall thickness difference of the spinning part caused by the friction of the spinning wheel on the spinning part.

[0017] 2. The arc variable wall thickness liner synchronous spinning device described in the utility model can directly spin the top arc of the processed spinning part. Because there is no influence of the spinning tail top, the starting point of the spinning wheel can be as close to the rotation axis as possible during spinning, and the arc on the top of the spinning part can be spun in place at one time. It also avoids the circular plane of the spinning part center pre-top caused by the use of tail top clamping.

[0018] 3. The synchronous spinning device for arc variable wall thickness medicine cap described in the utility model is more convenient for loading and unloading materials than the tail top clamping method. The through hole of the gland is designed as a square hole. When loading and unloading materials are required, the gland can be turned 45° to load or remove the material. The square step of the material fixed by the sliding sleeve is at its geometric center, that is, the material automatically finds the center after being loaded into the step, and there is no need to locate the center of the material by other means. Through these two designs, the efficiency of clamping materials can be increased.

[0019] 4. The synchronous spinning device for the arc variable wall thickness charge cap described in the utility model adopts the countersunk step in the sliding sleeve to clamp and fix the material. During the spinning process, the material will not deflect or fall, and the feeding is uniform, which can effectively improve the product quality and qualified rate.

[0020] 5. The synchronous spinning device for the arc variable wall thickness charge liner described in the utility model, 6. Compared with the traditional spinning, the tail top device is removed, which saves the tail top pressure adjustment and tail top centering processes. At the same time, there is no tail top pre-pressure, which is better adapted to the processing of thin-walled materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 for Figure 2 Schematic diagram of the cross-section structure;

[0023] Figure 3 It is an exploded schematic diagram of the three-dimensional structure of the utility model;

[0024] In the figure: 1. Slide rod; 2. Slide sleeve; 3. Pressure cover; 4. Copper plate; 5. Limit bolt; 6. Slide groove; 7. Mandrel; 8. Running cavity; 9. Installation cavity; 10. Installation body; 11. Limit ring; 12. Working head; 13. Threaded hole; 14. Loading step; 15. Loading trough; 16. Through hole; 17. Exposed material groove; 18. Wrench groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-3The utility model provides the following technical solutions: a synchronous spinning device for arc variable wall thickness medicine-shaped caps, comprising a slide bar 1 and a slide sleeve 2 movably arranged on the slide bar 1, characterized in that: the slide bar 1 comprises a bottom bar, a guide is arranged at the end of the bottom bar, a mounting cavity 9 with an opening is arranged at the end of the guide, a slide sleeve 2 is sleeved on the outer wall of the guide, a running cavity 8 adapted to the outer wall of the guide is arranged inside the slide sleeve 2, a mandrel 7 is arranged in the mounting cavity 9, and its working end extends into the running cavity 8, a loading step 14 is arranged at the end of the running cavity 8, a loading trough 15 is arranged in the middle of the loading step 14, a copper plate 4 is placed in the loading trough 15, a through hole 16 communicating with the running cavity 8 is arranged in the middle of the loading trough 15, a pressure cover 3 is installed on the outer wall of the loading step 14, a material exposure groove 17 is arranged in the middle of the pressure cover 3, wherein the slide sleeve 2 is used to position and fix the copper plate to realize synchronous spinning. It is made of 45# steel. The inner diameter of the running cavity 8 of the sleeve 2 is Φ90mm, which matches the outer diameter of the guide member of the slide rod 1 of Φ90mm, so that the sleeve 2 can slide axially along the slide rod 1. The through hole 16 in the middle of the charging groove 15 of the sleeve 2 has a diameter of Φ51mm, which is used for the core shaft 7 to pass through. The charging step 14 is a square step with a side length of 58mm, which is used to fix and position the copper plate. The size can be designed and adjusted according to the copper plate material to ensure that the copper plate can be placed in the charging groove 15. The depth of the charging groove 15 should be smaller than the thickness of the copper plate, which should be 0.3mm to 1mm smaller. Specifically, the mandrel 7 includes a mounting body 10 installed in the mounting cavity, a stop ring 11 is provided at the end of the mounting body 10, a working head 12 is provided at the end of the stop ring 11, and the working head 12 can pass through the through hole 16 to contact the copper plate 4, and a process column is provided at the end of the mounting body 10 away from the stop ring 11. The mounting body 10 is truncated. The mandrel 7 is a key part for the molding of the arc variable wall thickness shroud, and is generally made of common mold materials such as Cr12 or T10A, and the quenching hardness is HRC58-60. Its mounting body 10 is matched with the mounting cavity 9 of the slide rod 1, generally with a Morse taper of No. 5, and the length should not be less than 100mm; the shape of the end of the working head 12 is the same as the inner arc of the required spinning arc variable wall thickness shroud, and a margin is left, and its diameter should be 8-12mm larger than the maximum diameter of the shroud, and the extra margin is convenient for trimming and determining the total length; the middle part of the working head 12 can adopt a cylindrical end transition and serve as a reference during processing.

[0027] Specifically, a keyway is provided near the mandrel 7 of the guide part, and the process column extends into the keyway. The slide rod 1 is an adapter that connects to the spinning machine, fixes the mandrel, and guides the sleeve. It generally adopts common mold materials such as Cr12 or T10A, and the quenching hardness is HRC58-60.

[0028] The bottom rod of the slide bar 1 is matched with the main shaft hole of the spinning machine, and there should be a threaded hole in the middle to facilitate the fixation of the bottom rod with the spinning machine to prevent it from moving and falling off. The installation cavity on the guide of the slide bar 1 is matched with the installation body 10 of the mandrel 7, which is generally Morse taper No. 5, and the effective length should be greater than 100mm; the outer diameter is Φ90, which is the same as the inner diameter of the running cavity 8 in the sliding sleeve 2. A keyway is provided near the mandrel 7 of the guide, and the process column extends into the keyway, which is convenient for the later staff to use the triangular inclined iron to insert into the keyway and squeeze the process column so that the mandrel 7 can be taken out.

[0029] Specifically, a slide groove 6 is provided on the side wall of the guide member, and a threaded hole 13 is provided on the side wall of the sleeve 2. A limit bolt 5 is provided in the threaded hole 13 and extends into the slide groove 6 to enable the sleeve 2 to slide smoothly; a slide groove 6 is provided on the side wall of the guide member, and the length of the slide groove 6 is greater than the running length of the sleeve 2. Its function is to enable the sleeve 2 to rotate synchronously with the slide rod 1, and the sleeve 2 and the slide rod 1 can slide axially.

[0030] Specifically, round holes are provided at the corners of the loading trough 15. When the corners of the copper plate 4 are slightly deformed, the round holes can accommodate part of the deformed part, so that the deformation error of the incoming copper plate 4 can be relaxed, thereby better ensuring production.

[0031] Specifically, the gland 3 is connected to the charging step 14 through a thread. Both the material exposure groove 17 and the charging groove 15 are square, and the two are offset by 45°. The gland 3 is the main component for fixing the copper plate 4. It is formed by processing 45# steel. The internal thread of M82×2 is matched with the external thread of the charging step 14. The material exposure groove 17 of the gland 3 is a square hole with a side length of 58, which is matched with the charging groove 15 of the sliding sleeve 2 to facilitate the removal of materials. The end of the gland 3 away from the charging step 14 is provided with a 6° inclined surface, which is determined and adjusted according to the rotary wheel of the spinning machine. When the rotary wheel is large, the angle can be appropriately reduced, but it must be able to avoid interference and prevent the rotary wheel from contacting the tooling.

[0032] Specifically, a spanner slot 18 is provided around the side wall of the material exposure slot 17, and the size of the spanner slot 18 is 10 mm in width and 4 mm in depth. A half-moon spanner of corresponding size can be used to tighten and remove the gland 3.

[0033] Working principle and use process of the utility model: The arc variable wall thickness liner synchronous spinning device described in the utility model is to install the slide bar 1 on the spinning machine, then load the copper plate 4 into the loading groove 15, and tighten the pressure cover 3 on the loading step 14 by using a half-moon wrench and the wrench groove 18, and make the material exposure groove 17 and the loading groove 15 offset by 45° to ensure that the corner point of the copper plate 4 is limited and fixed. Then start the spinning machine, the machine tool spindle starts, and drives the core shaft 7 on the slide bar 1 to rotate; at the same time, the sliding sleeve 2 is driven to rotate at the same speed due to the action of the limit bolt 5. At the same time, the spinning wheel of the spinning machine constantly approaches and contacts the outer wall of the copper plate 4 and spins. The spinning wheel is controlled by the CNC program and moves along the trajectory of the pre-set outer arc of the liner. In the spinning process, the sliding sleeve 2 is resisted by the spinning wheel and gradually moves axially toward the slide bar 1, so that the working head 12 spins the inner wall of the copper plate 4 until the spinning is completed. When the CNC program of the spinning machine tool is completed, the spinning work is finished, and the worker rotates the gland 3 with a half-moon wrench to make the gland 3 separate from the loading step 14, and takes out the spinning part (arc variable wall thickness medicine liner). The processing is completed.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A synchronous spinning device for a circular arc variable wall thickness liner, comprising a slide rod (1) and a slide sleeve (2) movably arranged on the slide rod (1), characterized in that: The slide rod (1) comprises a bottom rod, a guide member is provided at the end of the bottom rod, a mounting cavity (9) having an opening is provided at the end of the guide member, a sliding sleeve (2) is provided on the outer wall of the guide member, a running cavity (8) matched with the outer wall of the guide member is provided inside the sliding sleeve (2), a core shaft (7) is provided in the mounting cavity (9), and its working end extends into the running cavity (8), a loading step (14) is provided at the end of the running cavity (8), a loading trough (15) is provided in the middle of the loading step (14), a copper plate (4) is placed in the loading trough (15), a through hole (16) communicating with the running cavity (8) is provided in the middle of the loading trough (15), a pressure cover (3) is installed on the outer wall of the loading step (14), and a material exposure trough (17) is provided in the middle of the pressure cover (3).

2. The synchronous spinning device for arc variable wall thickness liner according to claim 1, characterized in that: The core shaft (7) comprises a mounting body (10) mounted in the mounting cavity, a limiting ring (11) is provided at the end of the mounting body (10), a working head (12) is provided at the end of the limiting ring (11), and the working head (12) can pass through the through hole (16) to contact the copper plate (4), and a process column is provided at one end of the mounting body (10) away from the limiting ring (11).

3. The synchronous spinning device for arc variable wall thickness liner according to claim 2, characterized in that: The guide member is provided with a keyway near the core shaft (7), and the process column extends into the keyway.

4. The synchronous spinning device for arc variable wall thickness liner according to claim 1, characterized in that: The side wall of the guide member is provided with a slide groove (6), the side wall of the sliding sleeve (2) is provided with a threaded hole (13), and a limiting bolt (5) is provided in the threaded hole (13) and extends into the slide groove (6).

5. The synchronous spinning device for arc variable wall thickness liner according to claim 1, characterized in that: Circular holes are provided at the corners of the charging trough (15).

6. The synchronous spinning device for arc variable wall thickness liner according to claim 1, characterized in that: The gland (3) is connected to the charging step (14) via a thread, and the material exposure groove (17) and the charging groove (15) are offset by 45 degrees.

7. The synchronous spinning device for arc variable wall thickness liner according to claim 1, characterized in that: The side wall of the material exposure trough (17) is provided with a wrench groove (18).

8. The synchronous spinning device for arc variable wall thickness liner according to claim 2, characterized in that: The mounting body (10) is in the shape of a truncated cone.

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