CN211317084U - Replacement part structure for shell strength test - Google Patents
Replacement part structure for shell strength test Download PDFInfo
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- CN211317084U CN211317084U CN201921859404.0U CN201921859404U CN211317084U CN 211317084 U CN211317084 U CN 211317084U CN 201921859404 U CN201921859404 U CN 201921859404U CN 211317084 U CN211317084 U CN 211317084U
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- shell
- disc
- strength test
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Abstract
The utility model provides a replacement structure for shell intensity test belongs to the experimental field of shell target range. The newly designed special part for the strength test replaces a false fuse or a picking fuse, and the replacing part structure for the shell strength test comprises a disc and a cylindrical end connected with the lower end of the disc, wherein the disc and the cylindrical end are integrated; the diameter of the disc is smaller than the bore of the artillery; the cylindrical end connected with the lower end of the disc comprises a thread matched with the semi-prepared shot, and the thread size is the thread size matched with the semi-prepared shot. The strength test requirements of the shell body and parts of the shell are met, and the recovery and detection of the shell are facilitated.
Description
Technical Field
The utility model relates to a special-purpose member is used in test of shell body and spare part intensity belongs to the experimental field of shell target range.
The special strength test part is used for replacing a false fuse or a picking fuse of the head in the strength test of the shell body and parts of the shell, so that the flight resistance is increased, the shot range is reduced, and the detection of recovered shots is facilitated.
Background
When the shell and the bullet are launched, the action of high temperature, high pressure and high overload generated by the combustion of the launched charge is borne in the bore of the cannon. The shell projectile has to be subjected to a large number of shell body and part strength tests, so that the structural strength, the assembly firmness and the action reliability of the shell body and the parts are ensured.
The intensity test of the shell body and parts of the shell adopts sand bullets, false fuzes or fire fuzes and strong powder charge, wherein the fire fuzes or the false fuzes are the same as the real fuzes in the shape and size, if a large-angle shooting is adopted, the falling points of the bullets are scattered and are not easy to find, and meanwhile, the bullets fall to the ground and then penetrate into the ground to be deeper (generally 3-6 m), so that the recovery measurement of the bullets is not convenient. If small-angle shooting is adopted, ricochet is easy to generate, the flying distance of the ricochet is long, the direction is uncertain, and potential safety hazards exist on the site.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose of technique: the newly designed special strength test part is adopted to replace a false fuse or a picking fuse, so that the strength test requirements of the shell body and parts of the shell are met, and the recovery and detection of the shell are facilitated. Namely, the utility model provides a substitute structure for shell intensity test.
The technical scheme of the utility model: a substitute structure for a shell strength test is characterized by comprising a disc and a cylindrical end connected with the lower end of the disc, wherein the disc and the cylindrical end are integrated; the diameter of the disc is smaller than the bore of the artillery; the cylindrical end connected with the lower end of the disc comprises a thread matched with the semi-prepared shot, and the thread size is the thread size matched with the semi-prepared shot.
Further, the diameter of the disc is larger than the diameter of the mouth part of the semi-prepared pellet of the shell and smaller than 90% of the diameter of the centering part of the semi-prepared pellet.
Further, the thread profile angle of the cylindrical end thread is consistent with that of the semi-prepared shot.
The technical effects of the utility model:
the special part for the strength test is used for replacing a false fuse or a fire fuse to carry out the strength test of the shell body and parts, and the problem that the falling point of the bullet is scattered greatly and is not easy to find and recover is solved. The special part for the strength test is easy to realize generalization and serialization, ensures that the inner ballistic performance is unchanged, reduces the manufacturing cost and is convenient to use.
Drawings
Dummy or fuse-picking fuses as substitutes in fig. 1
FIG. 2 is a schematic view of a substitute part
FIG. 3 is a detailed view of a substitute
Figure 4 strength test projectile
1 replacing part 2 semi-prepared pellet
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The strength test is in the structural form of a substitute part shown in figure 2.
As shown in fig. 1, the substitute member comprises a disk and a cylindrical end connected with the lower end of the disk, and the diameter phi A of the disk is larger than the diameter of the mouth part of the semi-prepared pellet and smaller than 90% of the diameter of the centering part of the semi-prepared pellet.
The cylindrical end connected with the lower end of the disc comprises a thread matched with the semi-prepared shot, the size of the thread is the size of the thread matched with the semi-prepared shot,
consistent with the weight of the fuse replaced.
As in fig. 2, Φ a is greater than the diameter of the mouth of the semi-prepared pellet and less than 90% of the diameter of the centering portion of the semi-prepared pellet; the screwing length of B meets the requirements of 4.5-4.8 GJB 814A; c, adjusting the weight and the size; the actual fuse weight approaches (weight error is within a certain range); phi D is the thread size matched with the semi-prepared shot.
The design and structure should meet the following requirements:
a. the inner bore of the gun barrel and a brake should not be scratched; the diameter is smaller than the inner chamber of the gun, (preferably, phi A is larger than the diameter of the mouth part of the semi-reserve shot and smaller than 90 percent of the diameter of the centering part of the semi-reserve shot)
b. The weight of the special part is consistent with that of the fuse;
c. the thread tooth form angle, the thread size and the tolerance of the semi-prepared pellet are the same as those of the matched fuse;
d. the length of the thread connection with the semi-prepared shot is the same as the length of the thread of the semi-prepared shot;
e. the external dimension of the long connecting part meets the relevant requirements;
f. the special parts are preferably made of 20# to 60# carbon steel materials.
The function principle of the utility model
In the strength test of the shell body and parts of the cannonball, the maximum outer diameter of the special part for the strength test is designed to be close to the caliber of the cannonball under the condition of not influencing the performance of the inner trajectory, the flight resistance and the terminal landing resistance are increased through the change of the outer trajectory, the landing speed and the landing range of the cannonball are reduced, and the landing point of the cannonball is small in distribution. If small-angle shooting is adopted, the landing speed is low, the resistance is high, the bouncing flying distance is short, and the recovery of the shots is convenient. When the weight of the special piece is consistent with that of the fuse, the ballistic performance in the shot of the projectile is not changed.
The special part for the strength test has the following characteristics:
the test device is suitable for strength tests of shells and parts of shells with various types and calibers.
Secondly, the principle of increasing the flight resistance of the shot by using special parts for the strength test is adopted, so that the landing speed of the shot is low, the landing resistance is large, the range is controllable, and the recovery is convenient.
And the ballistic performance in the shot launching is unchanged, and the strength test requirements are met.
Compared with a false fuse or a fire fuse, the special part for the strength test has a simple structure, is convenient to process and low in price, and reduces the test cost.
And fifthly, the drop point scattering is small and controllable, and the recovery efficiency of the shot is greatly improved.
The implementation mode is as follows:
(1) design and manufacture of special parts for strength test
According to the caliber of the strength test shell, the thread size of the shell opening, the weight of a fuse and the like, a special strength test piece of a product with a specific model is designed, and a 20# to 60# carbon steel material is selected to manufacture the special strength test piece. The processing quality of special parts such as the weight, the external dimension, the appearance quality, the mark and the like of the special parts is checked according to the regulations.
(2) Shell body and part strength test
The special inspection piece should be perfect in appearance, free of rust, and free of deformation and damage of the thread.
All threads of the special part are screwed into the bullet body clockwise, and the special part is screwed tightly clockwise, so that the inner circular bead surface of the special part is tightly propped against the end surface of the bullet opening. If not screwed in place, priming and firing are inhibited.
And (4) carrying out a strength shooting test on the qualified strength test projectile of the special assembly piece to obtain the shape change information of the projectile body before and after the projectile body is launched.
Claims (3)
1. A substitute structure for a shell strength test is characterized by comprising a disc and a cylindrical end connected with the lower end of the disc, wherein the disc and the cylindrical end are integrated; the diameter of the disc is smaller than the bore of the artillery; the cylindrical end connected with the lower end of the disc comprises a thread matched with the semi-prepared shot, and the thread size is the thread size matched with the semi-prepared shot.
2. A substitute member structure for shell strength tests as claimed in claim 1, wherein the diameter of the disc is greater than the diameter of the mouth of the half-prepared pellet of the shell and less than 90% of the diameter of the centering portion of the half-prepared pellet.
3. A projectile strength test dummy member construction as claimed in claim 1, wherein the cylindrical end thread is at a thread profile angle corresponding to that of the semi-prepared projectile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859404.0U CN211317084U (en) | 2019-10-31 | 2019-10-31 | Replacement part structure for shell strength test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859404.0U CN211317084U (en) | 2019-10-31 | 2019-10-31 | Replacement part structure for shell strength test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211317084U true CN211317084U (en) | 2020-08-21 |
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ID=72055469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921859404.0U Active CN211317084U (en) | 2019-10-31 | 2019-10-31 | Replacement part structure for shell strength test |
Country Status (1)
| Country | Link |
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| CN (1) | CN211317084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503781A (en) * | 2021-08-26 | 2021-10-15 | 中国人民解放军32272部队51分队 | Rotary drop hammer type fuse test method |
-
2019
- 2019-10-31 CN CN201921859404.0U patent/CN211317084U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503781A (en) * | 2021-08-26 | 2021-10-15 | 中国人民解放军32272部队51分队 | Rotary drop hammer type fuse test method |
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