An impact testing device

Abstract

The utility model discloses an impact test device, including cylindrical elastic body and cylindrical hollow shell, one end of cylindrical elastic body is pressed into hollow shell, the other end of cylindrical elastic body is connected with elastic support, the front end of elastic support is connected with cylindrical elastic body, and the tail end of elastic support is fixed with the fragment for impact structure damage test.

Description

Technical Field

[0001] This utility model relates to the field of air gun testing, specifically an impact testing device. Background Technology

[0002] In air gun impact structural damage tests using large fragments, stable support and attitude control of the large fragments are required to ensure the impact speed and angle requirements are met.

[0003] Current fragment impact damage tests typically use a rope to pull a small mass block at the tail of the projectile. During flight, the air resistance of the mass block is transferred to the projectile via the rope, ensuring the projectile's flight direction remains constant. However, this method cannot guarantee the projectile's attitude stability. As the projectile travels from the gun barrel to the impact structure, it undergoes rotation and tumbling, making it impossible to guarantee the impact attitude of large fragments. Therefore, existing rope-pulled mass block technology is unsuitable for impact damage tests on large fragments. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an impact testing device to solve the problem of rotation and flipping that occur in existing large fragment impact tests.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an impact testing device, comprising a cylindrical projectile and a cylindrical hollow cartridge case, one end of the cylindrical projectile being pressed into the hollow cartridge case, the other end of the cylindrical projectile being connected to a projectile support, the front end of the projectile support being connected to the cylindrical projectile, and the end of the projectile support being fixed with fragments for impact structure damage testing.

[0006] As a preferred embodiment of this invention, the fragment is glued to the end of the sabot.

[0007] In a preferred embodiment of this invention, the sabot is cylindrical, and a groove is provided at the connection point between the cylindrical projectile and the sabot, the groove being adapted to the front end of the sabot. In another preferred embodiment, both the sabot and the cylindrical projectile are made of polyurethane foam.

[0008] As a preferred embodiment of this invention, the sabot has multiple tail feathers fixed on the side near the cylindrical projectile.

[0009] As a preferred embodiment of this invention, the tail feathers are made of plastic ribbons.

[0010] As a preferred embodiment of this invention, the hollow cartridge case is made of aluminum.

[0011] Compared with the prior art, the present invention provides an impact testing device with the following advantages:

[0012] One end of the cylindrical projectile is pressed into the hollow cartridge case, and a sabot is connected to the other end of the cylindrical projectile. The front end of the sabot is connected to the cylindrical projectile, and the end of the sabot is fixed with fragments for impact structural damage testing. The fragments are fixed to the tail of the cylindrical projectile, and the movement of the fragments is consistent with that of the cylindrical projectile. In the large fragment impact test, there will be no independent rotation or flipping, which can ensure the impact attitude of the large fragments and ensure the impact speed and angle requirements of the structural damage test. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Attached image references: 1. Fragment; 2. Salamander; 3. Tail feathers; 4. Cylindrical projectile body; 5. Hollow cartridge case; 6. Groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 This utility model provides an impact testing device, comprising two parts: a cylindrical projectile 4 and a cylindrical hollow cartridge case 5. The cylindrical projectile 4 further includes a sabot 2 and fragments 1 for impact structural damage testing. The hollow cartridge case 5 is made of aluminum.

[0017] The sabot 2 and the cylindrical projectile 4 are made of lightweight foam. For example, the sabot 2 and the cylindrical projectile 4 are made of polyurethane foam.

[0018] Furthermore, since the cylindrical projectile 4 is made of lightweight foam, it possesses a certain degree of elasticity. One end of the cylindrical projectile 4 is pressed into the hollow cartridge case 5, and the front end of the hollow cartridge case 5 is closed. Therefore, the cylindrical projectile 4 and the hollow cartridge case 5 are relatively fixed in position. In this utility model, the sabot 2 is a cylinder adapted to the hollow portion of the hollow cartridge case 5.

[0019] The other end (i.e., the tail end) of the cylindrical projectile 4 is connected to a sabot 2. Therefore, the front end of the sabot 2 is connected to the cylindrical projectile 4, and the end of the sabot 2 is fixed with a fragment 1 used for impact structure damage testing. In summary, the fragment 1 and the cylindrical projectile 4 form a relatively fixed integrated structure, avoiding the movement of the fragment 1 or flipping caused by ropes in the prior art. This application solves the impact posture problem existing in the prior art by using a relatively fixed structure.

[0020] Furthermore, the fragment 1 is glued to the end of the sabot 2. For example, the fragment 1 is fixed to the sabot 2 using tape, or liquid adhesive is used to fix the fragment 1 and the sabot 2.

[0021] Furthermore, in this utility model, a groove 6 is provided at the position where the cylindrical projectile 4 connects to the sabot 2. For example... Figure 1 As shown, the groove 6 is a groove 6 that is dug out in the central area of ​​the tail end of the cylindrical projectile 4 to match the sabot 2. Specifically, the groove 6 is adapted to the front end of the sabot 2. When connecting the two, the sabot 2 can be placed into the groove 6, and then the sabot 2 and the groove 6 can be bonded together with adhesive.

[0022] Furthermore, to ensure the stability of the projectile's impact posture, the sabot 2 is fixed with multiple tail feathers 3 on the side near the cylindrical projectile body 4. For example... Figure 1 As shown, four or more tail feathers 3 can be fixed, with one end of the tail feather 3 fixed and the other end being a free end.

[0023] In this invention, the tail feather 3 is made of plastic ribbon; of course, other materials such as cloth ribbons can also be used instead.

[0024] When making the shell, the tail feathers 3 can be fixed to the sabot 2 with tape, and then the sabot 2 can be fixed to the fragments 1 with tape. Then, the inner cylinder of the shell casing is gently pressed into the cylindrical shell body 4. Finally, the sabot 2 is inserted into the groove 6 of the cylindrical shell body 4, and the shell is finally made.

[0025] In operation, open the air cannon barrel, load the prepared projectile into the barrel, and then close the barrel. Activate the air cannon control system to pressurize the air cannon. Once the pressure reaches the test set value, issue a firing command. The air cannon fires, the projectile is launched and hits the test specimen. Check and record the test results; the test is then complete.

[0026] This invention presses one end of a cylindrical projectile 4 into a hollow cartridge case 5, and connects a sabot 2 to the other end of the cylindrical projectile 4. The front end of the sabot 2 is connected to the cylindrical projectile 4, and the end of the sabot 2 is fixed with a fragment 1 for impact structural damage testing. The fragment 1 is fixed to the tail of the cylindrical projectile 4, and the movement of the fragment 1 is consistent with that of the cylindrical projectile 4. The fragment 1 will not rotate or flip on its own during the impact test, which can ensure the impact posture of the fragment 1 and ensure the impact speed and angle requirements of the structural damage test.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An impact testing apparatus, characterized in that... It includes a cylindrical projectile and a cylindrical hollow cartridge case. One end of the cylindrical projectile is pressed into the hollow cartridge case, and the other end of the cylindrical projectile is connected to a sabot. The front end of the sabot is connected to the cylindrical projectile, and the end of the sabot is fixed with fragments for impact structure damage testing.

2. The impact testing apparatus according to claim 1, characterized in that... The fragment is glued and fixed to the end of the sabot.

3. The impact testing apparatus according to claim 2, characterized in that... The sabot is cylindrical, and a groove is provided at the position where the cylindrical projectile connects to the sabot. The groove is adapted to the front end of the sabot.

4. The impact testing apparatus according to claim 3, characterized in that... , The sabot and the cylindrical projectile are made of polyurethane foam.

5. The impact testing apparatus according to claim 1 or 2, characterized in that... The sabot has multiple tail feathers fixed on one side near the cylindrical projectile.

6. The impact testing apparatus according to claim 5, characterized in that... The tail feathers are made of plastic ribbons.

7. The impact testing apparatus according to claim 1 or 2, characterized in that... The hollow cartridge case is made of aluminum.

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