A guided contact trigger fuse and a preparation method thereof

Abstract

The application belongs to the technical field of missile fuze, and provides a guided trigger fuze and a preparation method thereof. The guided trigger fuze comprises an optical dome, an open ring-shaped metal ring and a wire. The optical dome is a concave dome-shaped body, and the open ring-shaped metal ring is fixed at the concave edge of the optical dome. The wire is welded at both ends of the open ring-shaped metal ring. The copper ring is combined with the optical dome closely, and the copper ring can be broken along with the breakage of the optical dome, so that the trigger of the detonation signal is realized. The detonation circuit effect is reliable, the structure is simple, the processing and manufacturing are convenient, the guiding function of the optical dome is not affected, the trigger time is short, and the detonation effect is good.

Description

Technical Field

[0001] This invention belongs to the field of missile fuze technology, and specifically relates to a guidance-type trigger fuze and its preparation method. Background Technology

[0002] Based on their operating principle, trigger fuses can be classified into mechanical trigger fuses, electrical trigger fuses, optical trigger fuses, chemical trigger fuses, and combined trigger fuses. Mechanical trigger fuses have a target-sensitive device composed of mechanical components such as an inertial body. The target's reaction force upon impact or the inertial force of the fuse's forward impact acts on the ignition device, igniting the ignition element (perfume cap), which then detonates the explosive element (detonator), or directly detonates the explosive elements in a sequence. Impact-type piezoelectric fuses have a target-sensitive device composed of piezoelectric elements and electronic components such as wires. The target-sensitive device is installed in the fuse head. The bottom of the fuse consists of components such as an electric detonator, explosion-proof plate, detonating tube, explosive charge, and detonating tube. The target's reaction force or the fuse's forward inertial force compresses the fuse head, causing deformation. The deformation energy of the piezoelectric element is converted into electrical energy for ignition, which is transmitted through the wire from the fuse head to the electric detonator at the bottom of the fuse, causing the electric detonator to detonate. The target sensing device of an electrically triggered fuse consists of various types of impact switches or inertial switches, etc. Its function is simply to close the switch upon impact with the target, thereby activating the ignition control circuit and enabling it to function normally. This patent utilizes the breakage of the conductive ring during rectifier triggering to transmit an instantaneous detonation electrical signal, without affecting the laser guidance of the rectifier.

[0003] In recent years, with the enhancement of the country's comprehensive strength, the military has successively begun live-fire exercises. With the upgrading of weapons, there is a growing need for increasingly precise guidance methods and instantaneous detonation methods. At the same time, the instability of the international situation has led to small-scale wars. All these factors have promoted the explosive growth of guided warhead-related military products. Summary of the Invention

[0004] The inventor, who has been engaged in military product design for many years, proposed a guided trigger fuse and its preparation method to address the above problems. The fuse is optimized for guided weapons and has a simple structure, is easy to process and manufacture, and has a good detonation effect.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: a guided trigger fuse is designed, including an optical radome, a non-closed annular metal ring and a wire; the optical radome is a hood-shaped body that is concave to one side, and the non-closed annular metal ring is fixed at the edge of the concave surface inside; the wire is welded to both ends of the non-closed annular metal ring.

[0006] Furthermore, the non-closed annular metal ring is a non-closed copper ring deposited using a vacuum coating method.

[0007] Furthermore, the non-closed annular metal ring is a non-closed copper ring formed by bonding copper foil with adhesive.

[0008] Furthermore, the optical radome is made of glass.

[0009] This invention also proposes a method for preparing a guidance-type trigger fuse, comprising the following steps: Step 1: Fixture positioning. Calculate the location of the coating hole based on the distance between the non-closed annular metal ring and the edge of the optical rectifier, and the radius of the concave surface of the optical rectifier. Calculate the opening width based on the width of the non-closed annular metal ring and the radius of the concave surface of the optical rectifier as required by the drawings. To increase the adhesion of the coating layer, the step is recessed in the fixture design, so that the coating hole is close to the coating position on the inner surface of the glass, to prevent the evaporation angle from being too large and the coating layer from being weak. Step 2: Coating process: 1. Using a barrier evaporation method; 2. Crystal control rate and thickness; 3. Coating temperature: 100℃ cold coating; 4. Film structure: G / Cr / Cu / A, where G is for the optical hood, A is for air, and Cr is for increasing the adhesion between the copper film layer and the optical hood. Step 3: Weld wires to both ends of the non-closed annular metal ring.

[0010] This invention also proposes a method for preparing a guidance-type trigger fuse, comprising the following steps: Step 1: Calculate the inner and outer diameters of the non-closed annular metal ring based on its width and position, and determine the diameter and height of the tooling platform to match the optical radome and the non-closed annular metal ring. Step 2: The tooling platform is designed to ensure that the non-closed annular metal ring does not fall off. The diameter of the platform should be larger than the diameter of the ring. The copper ring is fitted with the copper ring by utilizing its ductility, which increases the friction between the ring and the platform to prevent the ring from falling off or failing to maintain its shape and position during the gluing and calendering process. Step 3: Photosensitive adhesive is used for rapid initial and post-curing between the optical rectifier and the copper sheet; after the wires are soldered, GH-4 epoxy adhesive is applied to the upper surface of the glass and the copper sheet to encapsulate them; the wire soldering temperature is 300±10℃ and the soldering time is ≤10″.

[0011] The beneficial effects of this invention are as follows: The copper ring is tightly integrated with the optical rectifier, and the copper ring can break as the optical rectifier breaks, thereby triggering the detonation signal. The detonation circuit is reliable, has a simple structure, is easy to process and manufacture, does not affect the guiding function of the optical rectifier, has a short triggering time, and has a good detonation effect. Attached Figure Description

[0012] Figure 1This invention provides a schematic diagram of the overall structure of a guidance-type trigger fuze. Figure 2 A flowchart illustrating the plating process for creating a non-closed copper ring for this invention; Figure 3 This is a schematic diagram of the tooling platform for the copper ring. Detailed Implementation

[0013] Example 1, see Figure 1 A guided trigger fuse includes an optical radome 1, a non-closed annular metal ring 2, and a wire 3; the optical radome 1 is a hood-shaped body recessed to one side, and the non-closed annular metal ring 2 is fixed at the edge of the concave surface inside it; the wire 3 is welded to both ends of the non-closed annular metal ring 2.

[0014] Furthermore, the non-closed annular metal ring 2 is a non-closed copper ring plated by vacuum coating.

[0015] Furthermore, the non-closed annular metal ring 2 is a non-closed copper ring formed by bonding copper foil with adhesive.

[0016] Furthermore, the optical radome 1 is made of glass.

[0017] Example 2, see Figure 1 , 2 This invention also proposes a method for preparing a guidance-type trigger fuse, comprising the following steps: Step 1: Fixture positioning. Calculate the position of the coating hole based on the distance of the non-closed annular metal ring 2 from the edge of the optical rectifier and the radius of the concave surface of the optical rectifier. Calculate the opening width based on the width of the non-closed annular metal ring 2 and the radius of the concave surface of the optical rectifier 1 as required by the drawing. To increase the film adhesion, the step is recessed in the fixture design, so that the coating hole is close to the coating position on the inner surface of the glass, to prevent excessive evaporation angle and weak film adhesion. Step 2: Coating process: 1. Using a barrier evaporation method; 2. Crystal control rate and thickness; 3. Coating temperature: 100℃ cold coating; 4. Film structure: G / Cr / Cu / A, where G is the optical hood, A is air, and Cr is to increase the adhesion between the copper film layer and the optical hood 1. Step 3: Weld wires 3 to both ends of the non-closed annular metal ring 2.

[0018] Example 3, see Figure 1 , 3 This invention also proposes a method for preparing a guidance-type trigger fuse, comprising the following steps: Step 1: Calculate the inner and outer diameters of the non-closed annular metal ring 2 based on its width and position, and determine the platform diameter and height of the tooling table 4 to match the optical rectifier 1 and the non-closed annular metal ring 2. Step 2: The tooling table 4 platform is to ensure that the non-closed annular metal ring 2 does not fall off. The diameter of the platform should be larger than the diameter of the ring. The copper ring is fitted with the copper ring by utilizing the ductility of the copper ring, which increases the friction between the ring and the platform to prevent the ring from falling off or failing to maintain its shape and position during the glue application and calendering process. Step 3: Photosensitive adhesive is used for rapid initial and post-curing between the optical rectifier 1 and the copper sheet; after the wires 3 are soldered, GH-4 epoxy adhesive is applied to the upper surface of the glass and the copper sheet to achieve the function of encapsulation; the wire soldering temperature is 300±10℃ and the soldering time is ≤10″.

[0019] The beneficial effects of this invention are as follows: The copper ring and the optical rectifier are tightly integrated, and the copper ring can break as the optical rectifier breaks, thereby triggering the detonation signal. The detonation circuit is reliable, has a simple structure, is easy to process and manufacture, and has a good detonation effect.

Claims

1. A guided trigger fuse, characterized in that: It includes an optical radome, a non-closed annular metal ring, and wires; the optical radome is a hood-shaped body that is concave to one side, and the non-closed annular metal ring is fixed at the edge of the concave surface inside; the wires are welded to both ends of the non-closed annular metal ring.

2. The guided trigger fuse as described in claim 1, characterized in that: The non-closed annular metal ring is a non-closed copper ring plated using a vacuum coating method.

3. A guided trigger fuse as described in claim 1, characterized in that: The non-closed annular metal ring is a non-closed copper ring formed by bonding copper foil with adhesive.

4. A guided trigger fuse as described in claim 1, characterized in that: The optical radome is made of glass.

5. A method for preparing a guidance-type trigger fuze, characterized in that, Includes the following steps: Step 1: Fixture positioning. Calculate the location of the coating hole based on the distance between the non-closed annular metal ring and the edge of the optical rectifier, and the radius of the concave surface of the optical rectifier. Calculate the opening width based on the width of the non-closed annular metal ring and the radius of the concave surface of the optical rectifier as required by the drawings. To increase the adhesion of the coating layer, the step is recessed in the fixture design, so that the coating hole is close to the coating position on the inner surface of the glass, to prevent the evaporation angle from being too large and the coating layer from being weak. Step 2: Coating process:

1. Using a barrier evaporation method; 2. Crystal control rate and thickness; 3. Coating temperature: 100℃ cold coating; 4. Film structure: G / Cr / Cu / A, where G is for the optical hood, A is for air, and Cr is for increasing the adhesion between the copper film layer and the optical hood. Step 3: Weld wires to both ends of the non-closed annular metal ring.

6. A method for preparing a guidance-type trigger fuze, characterized in that, Includes the following steps: Step 1: Calculate the inner and outer diameters of the non-closed annular metal ring based on its width and position, and determine the diameter and height of the tooling platform to match the optical radome and the non-closed annular metal ring. Step 2: The tooling platform is designed to ensure that the non-closed annular metal ring does not fall off. The diameter of the platform should be larger than the diameter of the ring. The copper ring is fitted with the copper ring by utilizing its ductility, which increases the friction between the ring and the platform to prevent the ring from falling off or failing to maintain its shape and position during the gluing and calendering process. Step 3: Photosensitive adhesive is used for rapid initial and post-curing between the optical rectifier and the copper sheet; after the wires are soldered, GH-4 epoxy adhesive is applied to the upper surface of the glass and the copper sheet to achieve the function of encapsulation; The wire welding temperature is 300±10℃, and the welding time is ≤10″.

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