Detonating cord cutting device

Abstract

The utility model belongs to the technical field of initiating explosive device processing, and discloses a detonating cord cutting device which comprises a base (2), a plug (1), a pressing screw (3) and a cutting head (5). The base (2) is a high-strength steel hollow cylinder, and a detonating cord restraining channel is arranged in the base (2). A plug (1) and a cutting head (5) are respectively arranged at two ends of the detonating cord constraint channel; the front end of the detonating cord is inserted into the plug, and the to-be-cut end of the detonating cord penetrates out of the cutting head (5); the plug (1) and the cutting head (5) are connected with the base (2) through threads, and middle holes of the plug (1) and the cutting head (5) are connected into a straight line; and the rear end of the cutting head (5) is a smooth plane. According to the technical scheme, the length error is controlled within + / -0.2 mm through precise limiting matching of the base, the plug, the cutting head and the pressing screw.

Description

Technical Field

[0001] This utility model belongs to the field of pyrotechnics processing technology, specifically relating to a high-precision, high-quality, safe and universal cutting device for detonating cord. Background Technology

[0002] As a core component in commonly used pyrotechnic systems, the cutting quality of detonating cord directly affects detonation effects and safety requirements. In detonation transmission components and explosion networks, flexible detonating cords of varying lengths are frequently used. Current processes require cutting 10m-class detonating cords to millimeter-level precision. Traditional methods, such as direct cutting with a scalpel or circumferential cutting, have significant drawbacks: direct cutting is prone to incomplete cross-section deformation due to metal layer thickness limitations; circumferential cutting is prone to spiral cuts and cross-section skew due to variations in manual operation. Furthermore, the insufficient precision of manual marking (often exceeding ±2mm) results in millimeter-level length variations in the detonating cord, severely impacting the timing control and synchronization requirements of nanosecond-level explosion networks. In addition, manual fixing easily damages the roundness of the detonating cord, and burrs from ordinary cutting not only reduce detonation reliability but may even cause premature detonation, posing a risk of pre-detonation and endangering operational safety.

[0003] Therefore, designing a cable cutter that combines precise positioning, stable clamping, and efficient cutting to improve the length accuracy and cross-sectional quality of detonating cord has become a key technical requirement for enhancing the performance of explosive networks and ensuring the safety of pyrotechnic systems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this invention is: how to improve the length accuracy and cross-sectional quality of detonating cord.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a detonating cord cutting device, including a base 2, a plug 1, a screw 3, and a cutter 5; the base 2 is a high-strength steel hollow cylinder with a detonating cord restraint channel inside;

[0008] A plug 1 and a cutter 5 are installed at both ends of the detonating cord restraint channel, respectively; the front end of the detonating cord is inserted into the plug, and the end of the detonating cord to be cut out passes through the cutter 5; the plug 1 and the cutter 5 are connected to the base 2 by threads, and the central holes of the three are connected in a straight line; the rear end of the cutter 5 is set as a smooth plane.

[0009] Furthermore, the diameter of the detonating cord constraint channel is matched with the outer diameter of the detonating cord.

[0010] Furthermore, the plug is made of transparent acrylic glass.

[0011] Furthermore, the inside of the cut-off head is set with a gradually changing guide channel, its rear end is set with a guide section that fits with the detonating cord with a gap, and its front end is set with a cylindrical sizing section that fits tightly with the detonating cord.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) Precision control of dimensions: Through the precise limiting fit of the base, plug, cut-off head and press screw, the length error is controlled within ±0.2mm;

[0015] (2) Excellent end face quality: By designing a small gap cut head, the detonating cord cross-section is flat, burr-free, and highly round, effectively ensuring the quality of the detonating cord cross-section and ensuring the reliability and stability of detonation transmission;

[0016] (3) Enhanced safety performance: The high-strength body and closed constraint structure can control the detonation energy inside the device, reducing operational risks;

[0017] (4) Enhanced general performance: By replacing the base body module, it can be adapted to various detonating cord diameters and lengths, reducing the cost of repeated equipment purchases;

[0018] (5) Optimized operation efficiency: The transparent plug and scale lines work together to achieve rapid positioning, which significantly improves the operation efficiency of cutting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the detonating cord cutting tool structure of this utility model;

[0020] Figure 2 for Figure 1 Top view;

[0021] In the diagram: 1-plug; 2-base; 3-compression screw; 4-detonating cord; 5-cut end; 6-cut detonating cord. Detailed Implementation

[0022] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0023] This embodiment designs a high-precision, high-quality, safe, and universal cutting device for detonating cord. The device consists of a base, plugs, a clamping screw, and a cutting head assembly. The base body is a high-strength steel hollow cylinder with an internal detonating cord restraint channel. Transparent plugs and adjustable cutting heads are installed at both ends to effectively restrain and limit the detonating cord, ensuring accurate positioning and precise cutting. Its core features include:

[0024] (1) Safety restraint structure: The base is made of high-strength steel, and the diameter of the internal channel matches the outer diameter of the detonating cord to form a closed detonation energy restraint cavity;

[0025] (2) Precision positioning design: The plug is made of transparent organic glass, and the operator can align the end of the detonating cord with the preset scale through the visual window to ensure positioning accuracy;

[0026] (3) High-precision cutting structure: The small gap cutter adopts a gradual guide channel, which consists of a guide section at the inlet end (with the inner diameter reduced to the diameter of the detonating cord) and a cylindrical sizing section at the outlet end (which fits tightly with the detonating cord). The small gap cutter can achieve precise positioning and radial positioning of the detonating cord before cutting, ensuring that the cutting surface is flat and highly round.

[0027] (4) Modular adjustment component: The device is a split design, which can be extended in length through threaded connection to adapt to the cutting requirements of 40mm to 1000mm detonating cord.

[0028] Process of action:

[0029] (1) Select the corresponding specifications of base, end cap and cutter according to the target length;

[0030] (2) Screw the plug into the front end of the base and insert the detonating cord until it is pressed against the inside of the plug through the conical clamping surface;

[0031] (3) Pass the tail of the detonating cord through the cut end and tighten the clamping screw to the base to fix the detonating cord;

[0032] (4) Tighten the external thread of the cutter to the inside of the straight base, and use a blade to radially cut the detonating cord from the smooth section of the cutter.

[0033] The high-precision, high-quality, safe, and universal cutting device for detonating cord using this structure has been applied to cutting detonating cord in various types of warhead explosive network detonation components. Products that draw on its design concepts and mature technologies can be applied in equipment with similar technical requirements, and have broad application prospects.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A detonating cord cutting device, characterized in that, It includes a base (2), a plug (1), a screw (3), and a cut-off head (5); the base (2) is a high-strength steel hollow cylinder with a detonating cord restraint channel inside; A plug (1) and a cut-off head (5) are installed at both ends of the detonating cord restraint channel; the front end of the detonating cord is inserted into the plug, and the end of the detonating cord to be cut out is passed out through the cut-off head (5); the plug (1) and the cut-off head (5) are connected to the base (2) by threads, and the central holes of the three are connected in a straight line; The rear end of the cutter head (5) is set to a smooth plane.

2. The detonating cord cutting device as described in claim 1, characterized in that, The diameter of the detonating cord restraint channel matches the outer diameter of the detonating cord.

3. The detonating cord cutting device as described in claim 1, characterized in that, The plug is made of transparent acrylic glass.

4. The detonating cord cutting device as described in claim 1, characterized in that, The cut-off head has a gradually changing guide channel inside, with its rear end configured as a guide section that fits with the detonating cord with a gap, and its front end configured as a cylindrical sizing section that fits tightly with the detonating cord.

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