Special crimping tool for a certain type of wire joint

Abstract

The utility model relates to aviation parts assembly technical field, specifically for the special crimping tool of certain type electric wire joint, including the crimping upper die of cooperation hydraulic cold pressure crimping pliers, crimping lower die, the crimping upper die includes the massive main body and the cylindrical joint of being established at its top, the middle transverse through trapezoidal recess is equipped in the upper die main body lower end surface, and the massive convex of inverted trapezoidal is equipped at the top of trapezoidal recess, the crimping lower die includes the massive main body and the cylindrical joint of being established at its below, and the middle transverse through semicircular notch is equipped in the lower die main body upper end surface, when the trapezoidal recess of upper die and the semicircular notch of lower die are pasted and aligned, the massive convex lower end surface of upper die and the semicircular notch bottom of lower die keep the distance of being equipped. The utility model can carry out the compression of joint in specific position when crimping electric wire, can guarantee that the wire after crimping will not be under pressure also will not be over pressure.

Description

Technical Field

[0001] This utility model relates to the field of aerospace component assembly technology, specifically a special crimping tool for a certain type of wire connector. Background Technology

[0002] In areas of an aircraft subject to strong vibrations, wire connectors are often crimped to prevent them from coming loose due to frequent vibrations. However, on a certain type of aircraft, some cable connectors have experienced frequent instances of crimped wires breaking off or coming loose during long-term flight and use. This has led to system malfunctions or abnormal system operation, seriously affecting product quality and even threatening flight safety.

[0003] The investigation revealed that the wires broke or came loose from the crimping point because: Currently, some wire connectors on this type of aircraft have special specifications that often break or come loose. There are no suitable crimping tools for this type of aircraft. When using existing traditional crimping tools to crimp these wire connectors, under-voltage or over-voltage is likely to occur. As a result, the wire pull-out force does not meet the requirements, and the wire connectors are prone to break or come loose in high-frequency vibration environments. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, this utility model provides a special crimping tool for a certain type of wire connector. By designing a special crimping mold for this type of wire connector, and in conjunction with hydraulic cold-press crimping pliers, the connector can be crimped at a specific position when crimping the wire, which can ensure that the crimped wire is neither under-crimped nor over-crimped, and ensure that the wire pull-out force meets the requirements.

[0005] The technical solution of this utility model is:

[0006] A special crimping tool for a certain type of wire connector, including an upper crimping die and a lower crimping die that can be used with hydraulic cold-press crimping pliers;

[0007] The pressing upper mold includes a rectangular block upper mold body and a cylindrical connector located on top of it. The cylindrical connector is provided with a snap-fit ​​groove for installation on a hydraulic cold pressing crimping pliers. A trapezoidal groove is provided horizontally through the middle of the lower end face of the upper mold body. An inverted trapezoidal block protrusion is provided at the top of the trapezoidal groove, and the head of the protrusion is higher than the lower end face of the pressing upper mold body.

[0008] The crimping die includes a rectangular block-shaped lower die body and a cylindrical connector located below it. The cylindrical connector is provided with a snap-fit ​​groove for installation on a hydraulic cold-press crimping pliers. A transverse semi-circular slot is provided in the middle of the upper end face of the lower die body.

[0009] The lower end face of the upper mold body and the upper end face of the lower mold body can be aligned and fitted together. When the lower end face of the upper mold body and the upper end face of the lower mold body are aligned and fitted together, the trapezoidal groove on the lower end face of the upper mold body and the semi-circular groove on the upper end face of the lower mold body can be aligned, so that the inverted trapezoidal block protrusion under the upper mold body can extend into the semi-circular groove on the lower mold body, and the lower end face of the inverted trapezoidal block protrusion under the upper mold body maintains a set distance from the bottom of the semi-circular groove on the lower mold body.

[0010] Furthermore, the curvature of the semi-circular groove on the main body of the pressing mold is determined according to the curvature of the wire connector on a certain type of aircraft, to ensure that the wire connector can fit against the surface of the groove when it is inserted.

[0011] Furthermore, when the lower end face of the upper pressing mold body is aligned and fitted with the upper end face of the lower pressing mold body, the distance between the lower end face of the inverted trapezoidal block protrusion under the upper pressing mold body and the bottom of the semi-circular groove on the lower pressing mold body is set according to the requirements of the wire connector end size on a certain type of aircraft.

[0012] Furthermore, the upper and lower pressing molds are manufactured using 30CrMnSiA material through quenching.

[0013] During use, the operator inserts the cylindrical connector above the upper crimping die into the same-sized circular hole on the upper end of the hydraulic cold-press crimping pliers and secures it to the pliers with a locking screw. The operator then snaps the cylindrical connector below the lower crimping die into the same-sized circular hole on the upper end of the hydraulic cold-press crimping pliers' air pressure valve, completing the installation. During crimping, first strip the insulation from the portion of the wire to be crimped according to the shape of the wire connector. Then, insert the wire into the cylindrical body at the end of the wire connector and push it to the end. Open the air release valve on the hydraulic cold-press crimping pliers and wait for the air pressure valve to fully descend to the bottom of the pliers. Then, place the wire connector along with the wire into the lower crimping die. At the bottom of the semi-circular groove on the main body of the mold, close the vent valve. At this time, ensure that the upper and lower molds are on the same axis. The wire connector is crimped gradually: keep the upper mold in place, and the lower mold rises with the air pressure valve. First, quickly raise the air pressure valve until the wire connector contacts the lower end of the inverted trapezoidal block protrusion under the main body of the upper mold. Then, slowly raise the air pressure valve until the lower end of the upper mold coincides with the upper end of the lower mold. Then, open the vent valve, and the air pressure valve will descend until it reaches the bottom. The wire connector can then be removed from the semi-circular groove of the lower mold.

[0014] Beneficial effects:

[0015] This utility model provides a special crimping tool for a certain type of wire connector. By designing a special crimping mold for this type of wire connector, and using hydraulic cold-press crimping pliers, the connector can be crimped at a specific position when crimping the wire, ensuring that the crimped wire is neither under-crimped nor over-crimped, and ensuring that the wire pull-out force meets the requirements. This utility model is simple to install, easy to disassemble, and inexpensive. Attached Figure Description

[0016] Figure 1 This is a front view of the pressing mold according to an embodiment of the present invention;

[0017] Figure 2 This is a side view of the pressing mold according to an embodiment of the present utility model;

[0018] Figure 3 This is a bottom view of the pressing mold according to an embodiment of the present utility model;

[0019] Figure 4 This is a front view of the pressing lower mold according to an embodiment of the present utility model;

[0020] Figure 5 This is a side view of the pressing lower mold according to an embodiment of the present utility model;

[0021] Figure 6 This is a schematic diagram of the pressing fit between the upper and lower molds in an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the hydraulic cold-press crimping pliers according to an embodiment of the present invention;

[0023] In the diagram: 1- Upper crimping die; 11- Main body of the upper crimping die; 12- Cylindrical connector of the upper crimping die; 13- Cylindrical connector locking groove of the upper crimping die; 14- Lower end face of the main body of the upper crimping die; 15- Trapezoidal groove under the main body of the upper crimping die; 16- Block-shaped protrusion under the main body of the upper crimping die; 2- Lower crimping die; 21- Main body of the lower crimping die; 22- Cylindrical connector of the lower crimping die; 23- Cylindrical connector locking groove of the lower crimping die; 24- Lower end face of the main body of the lower crimping die; 25- Semi-circular groove on the main body of the lower crimping die; 3- Hydraulic cold-press crimping pliers; 31- Circular hole on the body of the hydraulic cold-press crimping pliers; 32- Stop screw; 33- Circular hole on the air valve of the hydraulic cold-press crimping pliers; 34- Air valve of the hydraulic cold-press crimping pliers; 35- Air release valve of the hydraulic cold-press crimping pliers. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] like Figures 1 to 6As shown in the figure, in one embodiment of the present invention, a special crimping tool for a certain type of wire connector includes an upper crimping mold 1 and a lower crimping mold 2 that can be used with a hydraulic cold-press crimping pliers 3;

[0026] The upper pressing mold 1 includes a rectangular block upper mold body 11 and a cylindrical connector 12 disposed above it. The cylindrical connector 12 is provided with a snap-fit ​​groove 13 for mounting on a hydraulic cold pressing crimping pliers. A trapezoidal groove 15 is provided transversely in the middle of the lower end face 14 of the upper mold body 11. An inverted trapezoidal block protrusion 16 is provided at the top of the trapezoidal groove 15. The head of the protrusion 16 is higher than the lower end face 14 of the upper pressing mold body.

[0027] The lower die 2 includes a rectangular block-shaped lower die body 21 and a cylindrical connector 22 located below it. The cylindrical connector 22 is provided with a snap-fit ​​groove 23 for installation on a hydraulic cold-pressing crimping pliers. A semi-circular slot 25 is provided horizontally in the middle of the upper end face 24 of the lower die body 21.

[0028] The lower end face 14 of the upper mold body 11 and the upper end face 24 of the lower mold body 21 can be aligned and fitted together. When the lower end face 14 of the upper mold body 11 and the upper end face 24 of the lower mold body 21 are aligned and fitted together, the trapezoidal groove 15 on the lower end face of the upper mold body can be aligned with the semi-circular groove 25 on the upper end face of the lower mold body, so that the inverted trapezoidal block protrusion 16 under the upper mold body can extend into the semi-circular groove 25 on the lower mold body. Figure 6 As shown, the lower end face of the inverted trapezoidal block protrusion 16 under the upper mold body maintains a set distance from the bottom of the semi-circular groove 25 on the lower mold body.

[0029] In this embodiment, the curvature of the semi-circular groove 25 on the pressing mold body 21 is determined according to the curvature of the wire connector on a certain type of aircraft, to ensure that the wire connector can fit against the surface of the groove 25 when it is inserted.

[0030] In this embodiment, when the lower end face 14 of the upper pressing mold body 11 is aligned and fitted with the upper end face 24 of the lower pressing mold body 21, the distance between the lower end face of the inverted trapezoidal block protrusion 16 under the upper pressing mold body 11 and the bottom of the semi-circular groove 25 on the lower pressing mold body 21 is set according to the wire connector end size requirements of a certain type of aircraft.

[0031] In this embodiment, the upper pressing mold 1 and the lower pressing mold 2 are manufactured using 30CrMnSiA material through quenching.

[0032] In use, the operator inserts the cylindrical connector 12 above the crimping mold 1 into the circular hole 31 of the same size on the upper end of the hydraulic cold-press crimping pliers 3, and fixes it to the pliers body with a locking screw 32. Figure 7 As shown, the cylindrical connector 22 below the crimping die 2 is snapped into the same size circular hole 33 at the upper end of the air pressure valve 34 of the hydraulic cold-press crimping pliers 3, thus completing the installation. During the crimping operation, first strip the insulation layer of the wire to be crimped according to the shape of the wire connector, then insert the wire into the cylindrical body at the tail end of the wire connector and push it to the end. Open the air release valve 35 on the hydraulic cold-press crimping pliers 3. After the air pressure valve 34 has completely descended to the bottom of the pliers, then place the wire connector along with the wire into the bottom of the semi-circular slot 25 on the body 21 of the crimping die, and then close the air release valve 35. At this time, it should be ensured that the crimping die 1 The upper mold 1 and the lower mold 2 are on the same axis. The wire connector is crimped in a gradual manner: the upper mold 1 remains stationary, and the lower mold 2 rises with the rise of the air pressure valve 34. First, the air pressure valve 34 is quickly raised until the wire connector contacts the lower end face of the inverted trapezoidal block protrusion 16 under the upper mold body 11. Then, the air pressure valve 34 is slowly raised until the lower end face 14 of the upper mold 1 coincides with the upper end face 24 of the lower mold 2. Then, the vent valve 35 is opened, and the air pressure valve 34 is lowered until the bottom. The wire connector can then be removed from the semi-circular slot 25 of the lower mold 2.

[0033] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A special crimping tool for a certain type of wire connector, characterized in that: This includes upper and lower crimping dies that can be used with hydraulic cold-press crimping pliers; The pressing upper mold includes a rectangular block upper mold body and a cylindrical connector located on top of it. The cylindrical connector is provided with a snap-fit ​​groove for installation on a hydraulic cold pressing crimping pliers. A trapezoidal groove is provided horizontally through the middle of the lower end face of the upper mold body. An inverted trapezoidal block protrusion is provided at the top of the trapezoidal groove, and the head of the protrusion is higher than the lower end face of the pressing upper mold body. The crimping die includes a rectangular block-shaped lower die body and a cylindrical connector located below it. The cylindrical connector is provided with a snap-fit ​​groove for installation on a hydraulic cold-press crimping pliers. A transverse semi-circular slot is provided in the middle of the upper end face of the lower die body. The lower end face of the upper mold body and the upper end face of the lower mold body can be aligned and fitted together. When the lower end face of the upper mold body and the upper end face of the lower mold body are aligned and fitted together, the trapezoidal groove on the lower end face of the upper mold body and the semi-circular groove on the upper end face of the lower mold body can be aligned, so that the inverted trapezoidal block protrusion under the upper mold body can extend into the semi-circular groove on the lower mold body, and the lower end face of the inverted trapezoidal block protrusion under the upper mold body maintains a set distance from the bottom of the semi-circular groove on the lower mold body.

2. The special crimping tool for a certain type of wire connector according to claim 1, characterized in that: The curvature of the semi-circular groove on the main body of the pressing mold is determined according to the curvature of the wire connector on a certain type of aircraft, to ensure that the wire connector can fit against the surface of the groove when it is inserted.

3. The special crimping tool for a certain type of wire connector according to claim 1, characterized in that: When the lower end face of the upper pressing mold body is aligned and fitted with the upper end face of the lower pressing mold body, the distance between the lower end face of the inverted trapezoidal block protrusion under the upper pressing mold body and the bottom of the semi-circular groove on the lower pressing mold body is set according to the requirements of the wire connector end size on a certain type of aircraft.

4. The special crimping tool for a certain type of wire connector according to claim 1, characterized in that: The upper and lower pressing molds are made of 30CrMnSiA material and are quenched.

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