CN102403643B - Steel-cored aluminum strand crimping assistant fixture - Google Patents

Abstract

The invention relates to the field of a lead wire crimping assistant tool for power transformation engineering construction, particularly to a steel-cored aluminum strand crimping assistant fixture, which comprises a clamp sleeve and a wire core pressing die; the clamp sleeve comprises an upper clamp sleeve and a lower clamp sleeve; one sides of the arc-shaped upper clamp sleeve and the arc-shaped lower clamp sleeve are hinged and arranged oppositely, while the other sides of the upper clamp sleeve and the lower clamp sleeve are parallelly provided with lips; the head of a hinged bolt is arranged on a pin shaft at the lip defect of the upper or lower clamp sleeve, and the screw rod of the hinged bolt is provided with a butterfly-shaped nut; the inner arc surfaces of the upper and lower clamping sleeves are provided with locating pins respectively; and the wire core pressing die comprises an upper pressing die and a lower pressing die, and the inner arc diameter of a combination of the upper and lower pressing dies is matched with that of the wire core. Compared with the prior art, the steel-cored aluminum strand crimping assistant fixture has the advantages that: 1) the fixture is simple in structure and convenient to use; 2) the fixture is convenient to insert, and the binding position of the fixture can be adjusted anytime; and 3) the pressure is avoided being dispersed towards middle section of the lead wire in a pressing process, and the manufacture quality of a connector for the lead wire with a large diameter of above 10mm is effectively improved.

Description

Auxiliary jig for crimping steel-cored aluminum stranded wire

technical field

The invention relates to the field of wire crimping auxiliary tools for substation engineering construction, in particular to an auxiliary crimping fixture for steel-cored aluminum stranded wires.

Background technique

At present, during the construction and wiring of power substation projects, it is necessary to make copper or aluminum joints at both ends of wires with various wire diameters. Special crimping pliers are used for small wire diameter wires, which is more convenient to make and can meet the quality requirements of the joints; Diameter wires are generally used in high-current occasions. When there is a poor contact, it will cause the contact to heat up. In severe cases, the contact will be melted and the wire will be blown. Through observation, it is found that the following problems exist in the production process:

1) Since the wire is multi-core, its ends are easy to disperse, and it is difficult to insert it neatly into the sleeve of the crimping tube. After crimping the sleeve, the outer layer of the end of the wire cannot be in reliable contact with the inner wall of the crimping tube, and there is poor contact When the wire is crimped, heat is unavoidable; the current crimping process is: wire binding, scribing and mold crimping. Before the wire is crimped, the wire is bound with aluminum wire, which is troublesome and consumes more wire.

2) When crimping short wires, especially those with a length of less than one meter, when one end is crimped and the other end is crimped, the wire core at the end of the wire will be under the action of the pressing force. Some loose wires are prone to so-called "lantern flowers". Under the action of the "skin effect" of the current, the loose wires will overheat and burn out in severe cases, but there is currently no effective way to avoid it.

Contents of the invention

The purpose of the present invention is to provide an auxiliary fixture for crimping of aluminum-steel wire, which overcomes the deficiencies of the prior art. The ends of the wires are neatly pressed into a bundle, which is convenient for insertion and connection, and can prevent local wire cores from loosening due to uneven force during pressing, and improve the crimping quality of large-diameter wires.

In order to solve the problems of the technologies described above, the technical solution of the present invention is:

A steel-cored aluminum stranded wire crimping auxiliary jig, including a jacket and a wire core die, the jacket includes an upper jacket and a lower jacket, and the arc-shaped upper jacket is hingedly arranged opposite to one side of the lower jacket , the other side of the upper jacket and the lower jacket are respectively provided with a lip parallel to the axial direction, the middle part of the lip is missing, and the head of the swing bolt is set on the pin shaft at the lip defect of the upper jacket or the lower jacket, The screw rod of the swing bolt is provided with a wing nut, and the inner arc surfaces of the upper jacket and the lower jacket are respectively provided with positioning pins; After the dies are assembled, the diameter of the inner arc matches the specification of the wire core, and the outer arcs of the upper and lower dies are provided with positioning grooves at the positioning pins corresponding to the inner arcs of the upper jacket and the lower jacket.

After the upper die and the lower die are pressed together, the inner hole is oblate, and the smallest hole diameter is 1-2mm smaller than the diameter of the wire core.

There are one or two or more than two positioning pins.

The upper die and the lower die are provided with threaded holes respectively, and the threaded holes correspond to the mounting holes on the upper jacket and the lower jacket respectively.

The jacket is made of aluminum alloy, and the surface is oxidized; the wire core die is made of carbon steel and treated with anticorrosion.

Compared with the prior art, the beneficial effects of the present invention are: 1) The structure is simple, easy to manufacture and convenient to use. 2) Before the end of the wire is inserted into the crimping tube sleeve, the end of the wire is neatly pressed into a bundle, which is convenient for insertion, and the binding position can be adjusted at any time according to the insertion depth. 3) When crimping both ends of a short wire, after one end is crimped, clamp it with a jig before the other end is crimped, which can prevent the pressure from spreading to the middle of the wire during pressing, prevent the wire from being partially loose, and effectively increase the length by more than 10mm. Splice fabrication quality for large diameter wires.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention;

Fig. 2 is a schematic diagram of the application state of the present invention.

In the figure: 1-upper jacket 2-lower jacket 3-pin 1 4-lip 5-swing bolt 6-pin 2 7-wing nut 8-locating pin 9-upper die 10-down press Die 11-positioning slot 12-threaded hole 13-installation hole 14-fixture 15-wire 16-socket 17-crimping tube 18-screw

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

See Figure 1, which is a structural schematic diagram of an embodiment of an aluminum steel cored wire crimping auxiliary jig of the present invention, including a jacket and a wire core die, the jacket is made of aluminum alloy, and the surface is oxidized; the wire core die is The carbon steel has undergone anti-corrosion treatment. The jacket includes an upper jacket 1 and a lower jacket 2. One side of the arc-shaped upper jacket 1 and the lower jacket 2 are hinged to each other through a pin-3. The upper jacket 1 and the lower jacket The other side of the jacket 2 is respectively provided with a lip 4 parallel to the axial direction, and the middle part of the lip 4 is defective. A wing nut 7 is provided on the screw rod of the upper jacket 1 and a positioning pin 8 is respectively arranged on the inner arc surface of the lower jacket 2; After the combination of 9 and lower die 10, the diameter of the inner arc matches the specification of the wire core, and the outer arcs of the upper die 9 and the lower die 10 correspond to 8 positioning pins on the inner arcs of the upper jacket and the lower jacket. A positioning groove 11 is provided.

After the upper die 9 and the lower die 10 are pressed together, the inner hole is oblate, and the smallest hole diameter is 1-2mm smaller than the diameter of the wire core specification, which can meet the deformation of the wire core after being pressed and ensure the crimping pressure.

The structural form of the positioning pin 8 is not limited, and the number can be one or two or more, as long as it can satisfy the positioning of the wire core die between the jackets.

In order to further ensure the positioning of the wire core die in the jacket, threaded holes 12 are respectively provided on the upper die 9 and the lower die 10. The holes 13 correspond to each other and are fastened and positioned by screws 18 .

As shown in Figure 2, the fixture 14 is set on the rear side of the socket 16 at the end of the wire 15 when in use, and the socket 16 is tightly pressed into a bundle before being inserted into the sleeve of the crimping tube 17, which is convenient for insertion It can also limit the displacement of the copper wire when pressing the casing, and can significantly improve the production quality of the wire joint. This fixture is especially suitable for the steel-reinforced aluminum stranded wire with a wire diameter of 10mm or more.

Claims (5)

1. jig is assisted in a steel reinforced aluminium conductor crimping, it is characterized in that, comprise chuck and core pressing mold, described chuck comprises chuck and following chuck, hinged being oppositely arranged in one side of the last chuck of arc and following chuck, the another side of last chuck and following chuck is respectively along the parallel lip limit that is provided with of axis direction, middle part, lip limit is damaged, the eyelet bolt head is arranged on chuck or down on the bearing pin at the damaged place, lip limit of chuck, the screw rod of eyelet bolt is provided with wing nut, is respectively equipped with alignment pin on the intrados of last chuck and following chuck; Described core pressing mold comprises top die and dip mold, and top die and dip mold make up its inner arc diameter dimension of back and core specification coupling, and the alignment pin place on described top die and the dip mold extrados on the intrados of corresponding upward chuck and following chuck is provided with location notch.

2. the auxiliary jig of a kind of steel reinforced aluminium conductor crimping according to claim 1 is characterized in that, endoporus is oblate after described top die and the dip mold pressing, and minimum place, aperture is than the little 1-2mm of core format diameter.

3. the auxiliary jig of a kind of steel reinforced aluminium conductor crimping according to claim 1 and 2 is characterized in that, described alignment pin be one or two or more than two.

4. the auxiliary jig of a kind of steel reinforced aluminium conductor crimping according to claim 3 is characterized in that, is respectively equipped with screwed hole on described top die and the dip mold, and this screwed hole is corresponding with the installing hole on last chuck and the following chuck respectively.

5. the auxiliary jig of a kind of steel reinforced aluminium conductor crimping according to claim 1 is characterized in that described chuck is aluminum alloy material, and the surface is through oxidation processes; The core pressing mold is that carbon steel is through preservative treatment.

Images