JPS582600A - Hollow control crushing head section for exploding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to explosive devices, and more particularly to a hollow controlled fragmentation head of an explosive device, and provides a rapid and inexpensive manufacturing technique for an explosive fragmentation device.・For explosive devices such as bullets, it is customary to use a firing head made of fragmentation material. For example, US patent spear 2
, 933,799, the fracturing member is a helically wound wire having spaced notches, with adjacent turns welded together. In this system, the notch constitutes a weak zone that increases the fragmentation of the projectile head by detonation of the explosive. The crushing gives good short range stopping ability.

However, it has the disadvantage that welding the turns of wire together is time consuming.

In another arrangement, as described in West German Pat. . With this shell, the velocity imparted by the detonation of the explosive is extremely limited. The main reason for this is that the shock wave that destroys the inner tube partially passes through the steel ball gap, so that the entire energy generated by the explosion cannot be concentrated onto the steel ball. Also, the manufacture of this type of launch head is relatively complex and difficult to adapt to small devices. - When the properties of these conventional crushing heads are taken together, they are mainly (a) effective for short distances, but less effective for long distances;

(b) They are complex and time consuming to manufacture.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a well-controlled fragmentation explosive device with improved long-range stopping capability, yet sufficiently reliable that even small launch heads can be manufactured easily and quickly. There is something to do.

The present invention provides a hollow controlled fragmentation head for a double-walled cage-like explosive device, the outer wall of which is constructed of a helically wound wire; Cutouts extending over a portion of the thickness of the wire and spaced at predetermined intervals are provided, the inner wall being a continuous wall surrounding the chamber containing the explosive, and between the outer wall and the inner wall. A plurality of bullet forming members are inserted.

Preferably, the bullet-forming member forms the intermediate layer.

It is also advantageous for the bullet-forming element to be partially inserted into the gap of the wire winding, which has been previously cut out.

Furthermore, the fracture portion and the bullet-forming member defined within the wire by the notch are preferably dimensioned such that the amount of the bullet-forming member is less than the amount of the fracture portion.

Further, it is preferable that the cutout portion extends from the inner wall surface of the wire in the radial direction of the screen.

Advantageously, the bullet-forming element is a steel ball.

The present invention further provides an explosive device including a head as described above.

The preferred hollow head according to the invention has good stopping ability. This is achieved by optimizing the velocity of the pre-notched fragmentation body of the invention since the velocity imparted by the shock wave from the explosion is much better than that of conventional projectile heads. Further, according to the present invention, the windings of the wire with the pre-cut notches are not connected to each other, and the head is an independent screen-like body, so that manufacturing is simple and quick. The blind can be made separately and can be easily placed on various types of projectiles. Also, by making the hollow head in the form of a blind in advance, the preparation of various explosive projectiles can be speeded up. That is, the casing can be made from two parts.

Embodiments of the present invention will be described below with reference to the drawings.

The hollow head according to the invention has a double-walled cage 10 which is placed inside an explosive projectile or shell. Curtain body 10
has an outer wall 1, an inner wall 2, and a number of bullet-forming members 6, and the members 3 may be, for example, steel balls or have various other shapes; It is placed between. An explosive is placed in the hollow interior 20 of the screen-like body 10. The outer wall 1 is composed of a spirally wound wire 4 with a rectangular cross section. The wire 4 is pre-provided with notches 5 at regular intervals extending from its inner surface in the radial direction of the screen over a portion of the thickness of the wire 4. This notch 5
Some of these are shown. These notches 5 act as weak strength areas for defining the parts that will become the crushed pieces 6.

The fragments 6 are separated when the explosive inside the chamber 20 is detonated. The turns of the precut wire 4 are in no case connected to each other.

A steel member 3 is arranged between the two walls 1 and 2.

In the embodiment of FIG. 1, the member 6 is a steel ball forming the intermediate layer.

The embodiment shown in Fang 2 is the same as the embodiment shown in Fang 1, except that a portion of the steel ball is fitted into the gap between adjacent turns of wire 4, which has been previously cut out. This feature is advantageous in making a small hollow head, and regardless of the method used, a strong impact force can be obtained.

In a preferred embodiment, the dimensional relationship between the steel member 3 and the crushed body 6 is such that the amount of the steel member 3 is smaller than the amount of the crushed body 6.

The velocity imparted to the crushing body 6 by the explosion thereby ensures a good long-range impact.

[Brief explanation of drawings]

Figure 1 is a partially exploded sectional view of an embodiment of the head fang 1 according to the present invention. Fang 2 is a similar cross-sectional view of an embodiment of Fang 2. [Explanation of symbols of main parts] Double-walled cage-like body −−−−−−−−−−−−−−−−−−−
−−−−−−−−−−−−i.

Claims (1)

[Claims] 1. It has a double-walled cage-like body; its outer wall is formed by spirally winding wire, and the outer wall has a wire extending over a part of the thickness of the wire. In addition, cutouts are provided at predetermined intervals, the inner wall is a continuous wall surrounding the chamber for storing the explosive, and a plurality of bullet-forming members are inserted between the outer wall and the inner wall. A hollow controlled fragmentation head for an explosive device characterized by: 2. In the crushing head described in claim 1,
The bullet-forming member forms an intermediate layer. 3. Fracture part 1 described in claim 1 or claim 2
In this case, the bullet-forming member is partially housed in the gap between the turns of the wire, which are pre-notched. 4. In the crushing head according to any one of claims 1 to 3, the crushing part defined in the wire by the notch and the bullet-forming member are a bullet-forming member. The size is such that the amount of the crushed portion is smaller than the amount of the crushed portion. 5. In the crushing head according to any one of claims 1 to 4, the notch extends from the inner surface of the wire in the radial direction of the cage-like body. 6. In the crushing head according to any one of claims 1 to 5, the bullet forming member is made of steel. 2. An explosive device having a crushing head according to any one of claims 1 to 7.