JPH0261210B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for removing the insulation coating from the terminal portion of the electric wire.
The present invention relates to an electric wire terminal processing method in which the exposed core wire is preliminarily soldered.

[Prior Art] In order to connect electronic components to the terminals of electric wires or to connect the terminals to printed circuit boards, it has been conventional practice to remove the insulation coating from the terminals and pre-solder the core wires. It has been implemented. However, since the core wire of an electric wire is generally formed by twisting a large number of fine wires together, there is a troublesome problem that the end portion of the core wire tends to come undone when the insulation coating is removed. Therefore,
Before pre-soldering, it is necessary to go through the troublesome process of re-twisting the ends of the unraveled core wires, and once the ends of the core wires have been twisted together, it is difficult to return them to their original narrow diameter. There is a drawback that it is difficult to pass the soldered end of the core wire through the through hole of the printed circuit board.

[Object of the Invention] The object of the present invention is to provide a method for processing the end of an electric wire, which can be processed without unraveling the tip of the core wire when the insulation coating of the end of the electric wire is removed and preliminary soldering is performed on the end of the core wire. Our goal is to provide the following.

[Summary of the invention] The gist of the present invention for achieving the above object is as follows:
The first step is to make cuts in the insulation coating at the end of the wire and pull it out from the core wire at sufficient intervals to prevent it from falling off the core wire.
a second step of immersing the core wire exposed in the first step in a solder bath to apply solder to the core wire; and a step of cutting off the removed insulation coating by cutting the core wire. 3. A method of processing an end of an electric wire, characterized by comprising the steps of 3.

[Embodiments of the Invention] The method according to the present invention will be explained in detail based on illustrated embodiments.

In Figure 1 a to f, a wire 1 is paired with two core wires 2.
This is an example of the terminal processing process in the case where the terminal is composed of a and 2b. First, as shown in a, the core wires 2a, 2 are inserted into the insulation coating 3 at the end of the electric wire 1 using a knife blade.
Make a cut 4 to separate b and perform the crotch split. In this case, the cut 4 may be made completely up to the tip, but the process described later will be easier if only the tip is left as is without making the cut 4 as shown in the figure.

Next, as shown in b, attach a to the terminal part of the insulation coating 3.
Make a cut shown at C1-C1 and pull out the insulating coating 3a at the terminal part by a distance S without falling off the core wires 2a, 2b. That is, the core wires 2a and 2b are exposed within the range of the interval S.

Here, as shown in c, the core wire 2 in the range of the interval S
After the flux 5 is applied by dropping to the exposed parts of the wires a and 2b, this part is further immersed in molten solder in a solder bath, and preliminary solder 6 is applied to the core wires 2a and 2b as shown in d. At this stage, the core wire 2a,
Since the insulating coating 3a remains attached to the tip of the wire 2b, the preliminary solder 6 is attached only to the range of the interval S where the core wires 2a and 2b are exposed.

Next, as shown in e, by cutting the C2-C2 portion d near the end of the part to which the preliminary solder 6 is attached, a product as shown in f is obtained.

In the above steps, the step of making the splitting notch 4 in a may be performed after the cutting step in e.
Of course, if there is only one core wire, this splitting step is not necessary.

FIG. 2 shows an example of a wire end processing machine for continuously processing steps a to f shown in FIG.
The electric wires placed on the endless caterpillar 10 are sequentially split in process section A, then the insulation coating 3a is removed in process section B as shown in FIG. After dropping flux from No. 11, preliminary solder 6 is attached in process section D, and core wires 2a and 2b to which solder 6 is attached are cut in process section E, and unnecessary insulation coating 3a is cut off. It is.
In the figure, 12 indicates a solder bath, and 13 indicates a control panel.

[Effects of the Invention] As explained above, in the electric wire terminal treatment method according to the present invention, preliminary solder is applied to the exposed core wire while the end portion of the insulation coating remains attached to the core wire, the core wire is hardened, and then the wire is insulated. Since the covering is cut off, the core wire does not come undone, and the conventional step of twisting together the ends of the unraveled core wire can be omitted. Furthermore, since the ends of the core wire are solidified by solder without unraveling, the diameter of the core wire can be maintained as thin as it is, which is extremely advantageous for wiring work in the next process.

[Brief explanation of drawings]

The drawings show an embodiment of the method for treating the ends of electric wires according to the present invention, and FIGS.
The figure is a front view of a wire end treatment machine that implements the method of the present invention. 1 is an electric wire, 2a and 2b are core wires, 3 and 3a are insulation coatings, 4 is a notch, 5 is a flux, and 6 is a preliminary solder.

Claims (1)

[Scope of Claims] 1. A first step in which cuts are made in the insulation coating at the terminal portion of the electric wire and the core wire is pulled out at intervals such that the wire does not fall off the wire, and the core wire exposed in the first step is placed in a soldering bath. A method for processing an end of an electric wire, comprising: a second step of applying solder to the core wire by immersing it in water; and a third step of cutting off the removed insulation coating by cutting the core wire. 2. The electric wire terminal treatment method according to claim 1, further comprising a step of splitting the insulation coatings of the plurality of core wires before the first step. 3. The electric wire end treatment method according to claim 1, further comprising a step of splitting the insulation coatings of the plurality of core wires after the third step.