A press point riveting tool

Abstract

This utility model provides a crimping tool for inertial switches. The crimping tool is used for inertial switches, which include a contact sleeve, a contact rod housed in the contact sleeve, a safety spring elastically abutting against the contact sleeve and the contact rod, and a cover plate on the contact sleeve. The crimping tool includes a first mold structure and a second mold structure. The first mold structure can accommodate the inertial switch and includes a base, a first mold on the base, and a core rod on the first mold. The second mold structure can cooperate with the first mold structure and includes a second mold, a core on the second mold, and a punch on the upper end of the core. This crimping tool has high crimping efficiency and high pass rate, and is suitable for crimping and riveting non-threaded cover plates on similar types of inertial switches for various products.

Description

Technical Field

[0001] This utility model relates to the field of inertial switch riveting technology, and in particular to a pressing riveting fixture. Background Technology

[0002] The inertial switch, consisting of a contact sleeve, safety spring, contact rod, and cover, is assembled at the bottom of the lower part of the fuze and plays a crucial role in its operation. Upon impact with the target, the contact switch on the projectile's head closes or the inertial switch activates, connecting the ignition circuit to the detonating detonator, thus detonating the main warhead. When the projectile grazes the ground, the inertial switch activates again, connecting the ignition circuit to the detonating detonator, further detonating the main warhead. Therefore, during the riveting process, it is essential to ensure the quality of the inertial switch riveting, ensuring that its conductivity is not compromised to guarantee the fuze's reliability. However, traditional inertial switch riveting often involves manual riveting with steel needles, which is time-consuming, labor-intensive, unsafe, has a high scrap rate, low efficiency, and results in significant costs for mass assembly after riveting. Utility Model Content

[0003] The purpose of this utility model is to provide a pressing point riveting fixture to solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a pressing point riveting fixture, the pressing point riveting fixture is used for an inertial switch, the inertial switch includes a connecting sleeve, a connecting rod housed in the connecting sleeve, a safety spring elastically abutting against the connecting sleeve and the connecting rod, and a cover plate provided on the connecting sleeve, the pressing point riveting fixture includes a first mold structure and a second mold structure, the first mold structure can accommodate the inertial switch, the first mold structure includes a base, a first mold on the base and a core rod provided on the first mold, the second mold structure can cooperate with the first mold structure, the second mold structure includes a second mold, a core provided on the second mold and a punch provided on the upper end of the core.

[0005] Preferably, the core and the punch are fixedly connected to the second die sleeve via an M-screw.

[0006] Preferably, the first mold sleeve is coaxial with the base.

[0007] Preferably, the first mold sleeve has a first connecting hole, and the core rod passes through the first connecting hole.

[0008] Preferably, the second mold sleeve has a second connecting hole, and the core passes through the second connecting hole.

[0009] The beneficial effects of this utility model are:

[0010] This utility model discloses a pressing and riveting fixture. First, a cover plate pressing fixture presses the cover plate of the inertial switch into the electrical sleeve. Then, the pre-pressed inertial switch is placed into the riveting fixture for riveting. After riveting, the cover plate is flat and free of cracks, and the riveting points are uniform and reliable, meeting the requirements. This utility model's pressing and riveting fixture offers high riveting efficiency and a high pass rate, applicable to non-threaded cover plate pressing and riveting on similar types of inertial switches for various products. Compared with manual steel needle riveting, this structure is safer, saves time and labor, effectively reduces costs, and improves the yield rate. It facilitates batch riveting assembly of inertial mechanisms on the production line. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the pressing point riveting fixture of this utility model from one perspective;

[0013] Figure 2 for Figure 1 A structural schematic diagram of the riveting fixture at the shown pressing point from another perspective;

[0014] Figure 3 for Figure 1 A schematic diagram of the core structure of the crimping fixture shown;

[0015] Figure 4 for Figure 3 A magnified view of part A of the core shown;

[0016] Figure 5 This is a schematic diagram of a non-threaded, screw-operated inertial switch according to one embodiment.

[0017] Legend: Base 1, First mold sleeve 2, Core rod 3, Punch 4, Core 5, Second mold sleeve 6, Screw 7, Electrical connection sleeve 81, Safety spring 82, Electrical connection rod 83, Cover plate 84. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figures 1-5 This utility model provides a crimping point riveting fixture for an inertial switch. The inertial switch includes a junction sleeve 81, a junction rod 83 housed in the junction sleeve, a safety spring 82 elastically abutting against the junction sleeve and the junction rod, and a cover plate 84 disposed on the junction sleeve. The crimping point riveting fixture includes a first mold structure and a second mold structure. The first mold structure can accommodate the inertial switch and includes a base 1, a first mold 2 disposed on the base, and a core rod 3 disposed on the first mold. The second mold structure can cooperate with the first mold structure and includes a second mold 6, a core 5 disposed on the second mold, and a punch 4 disposed on the upper end of the core.

[0021] Specifically, the inertial switch's contact sleeve, safety spring, contact rod, and cover plate are sequentially placed on the base. A process pin passes through the first mold sleeve 2 to hold the cover plate in place before lowering the first mold sleeve 2, ensuring that the first mold sleeve and the base are essentially coaxial. This ensures the cover plate is correctly pressed, without misalignment or loosening. The core rod 3 is placed into the first connecting hole of the first mold sleeve 2 and pressed under a pneumatic punch, completing step one. The core 5 is placed into the second connecting hole of the second mold sleeve 6, and its position and guidance are locked by tightening the M4 screw 7. After the pressed inertial switch is placed on the base 1, it is riveted, completing step two. It is understood that the base 1 of the pressing and riveting fixtures is the same, possessing interchangeability and versatility.

[0022] The single-sided riveting allowance between the cover plate and the electrical sleeve of the inertial switch is small, only 2.7mm, requiring 4 riveting points. Therefore, the riveting angle of the 4 claws on the head of the core 5 is designed to be 10°, with a length of 0.3mm~0.5mm, ensuring uniform and reliable riveting. This design has been verified in production and is now used in mass production. A punch 4 is inserted into the hole of the core 5, and the bottom plane of the punch matches the riveting angle of the core head, effectively ensuring that the cover plate is flat and does not deform after riveting.

[0023] The cover plate has a non-threaded screw-on structure. First, process pins are used to press the various components of the inertial switch into a pressing fixture, ensuring that the first mold sleeve 2 and the base 1 are essentially coaxial, thus guaranteeing the correct pressing position of the cover plate. Only after forming a complete inertial switch structure can spot riveting be performed. Specifically, the process pins are made of wood or copper rods to avoid damaging the components.

[0024] In one embodiment, the core and the punch are fixedly connected to the second die sleeve via an M4 screw 7. After the M4 screw 7 is tightened, the punch 4, the core 5, and the second die sleeve 6 form an integral structure, reducing the assembly steps of tooling parts during riveting.

[0025] In one embodiment, the first mold sleeve is coaxial with the base.

[0026] In one embodiment, the first mold sleeve has a first connecting hole, and the core rod passes through the first connecting hole.

[0027] In one embodiment, the second mold sleeve has a second connecting hole, and the core passes through the second connecting hole.

[0028] The working principle of this utility model's pressing and riveting fixture is as follows: The inertial switch's contact sleeve, safety spring, contact rod, and cover are sequentially placed on the base 1. Because of the spring, the cover needs to be pressed down. Then, a process pin passes through the first mold sleeve 2 to press against the cover, adjusting the cover to the center position. The first mold sleeve 2 is then lowered, ensuring that the first mold sleeve 2 and the base 1 are basically coaxial, thus ensuring the cover is pressed in the correct position without misalignment or loosening. The core rod 3 is then inserted into the hole of the first mold sleeve 2 for pressing. After the pressed inertial switch is placed on the base 1, the M4 screw 7 passes through the second mold sleeve 6, extends into the appropriate position of the punch 4, and is tightened. The core 5 is then inserted into the hole of the punch 4 for spot riveting.

[0029] This utility model discloses a pressing and riveting fixture. First, a cover plate pressing fixture presses the cover plate of the inertial switch into the electrical sleeve. Then, the pre-pressed inertial switch is placed into the riveting fixture for riveting. After riveting, the cover plate is flat and free of cracks, and the riveting points are uniform and reliable, meeting the requirements. This utility model's pressing and riveting fixture offers high riveting efficiency and a high pass rate, applicable to non-threaded cover plate pressing and riveting on similar types of inertial switches for various products. Compared with manual steel needle riveting, this structure is safer, saves time and labor, effectively reduces costs, and improves the yield rate. It facilitates batch riveting assembly of inertial mechanisms on the production line.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A press-fit point riveting tool characterized by, The crimping fixture is used for an inertial switch. The inertial switch includes a junction sleeve, a junction rod housed in the junction sleeve, a safety spring elastically abutting against the junction sleeve and the junction rod, and a cover plate disposed on the junction sleeve. The crimping fixture includes a first mold structure and a second mold structure. The first mold structure can accommodate the inertial switch. The first mold structure includes a base, a first mold on the base, and a core rod disposed on the first mold. The second mold structure can cooperate with the first mold structure. The second mold structure includes a second mold, a core disposed on the second mold, and a punch disposed on the upper end of the core.

2. The crimping tooling according to claim 1, wherein the core and the punch are fixedly connected to the second die sleeve by an M-screw.

3. The press point riveting tool of claim 1, wherein: The first mold sleeve is coaxial with the base.

4. The press point riveting tool of claim 1, wherein: The first mold sleeve has a first connecting hole, and the core rod passes through the first connecting hole.

5. The press point riveting tool of claim 1, wherein: The second mold sleeve has a second connecting hole, and the core passes through the second connecting hole.

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