JP3936580B2 - Manufacturing method of thin wire connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a connector used when connecting thin wires with high accuracy.
[0002]
[Prior art]
In the case of the electrocasting method, when the outer diameter is 1.0 mm or more, unevenness occurs on the surface, and it takes a long time, resulting in high costs.
Further, according to the core drawing drawing method, the outer diameter can be finished with high accuracy, but wrinkles or the like are generated on the inner diameter side, so that the inner surface with high accuracy cannot be obtained.
Furthermore, in order to remedy this drawback, there was a case where a core wire was inserted by a core drawing drawing method, but there was a fatal defect that the core wire could not be pulled out due to external pressure.
[0003]
[Problems to be solved by the invention]
By solving the above-mentioned problems caused by the conventional technology, a method for manufacturing a connector with good productivity is provided.
[0004]
[Means for Solving the Problems]
Finish the outer diameter of the core pipe by electrocasting method so that it is within 80% of the outer diameter of the connector, shorten the electrocasting time, and make the outer diameter within the range that can withstand the strength as the core of the core drawing method. .
Next, this electroformed pipe with a core wire is used as a core pipe of the core drawing method, and a pipe made of a predetermined material is polymerized through a die.
As a result, in the conventional drawing method, it has been necessary to pull out the core wire that has been put in place to prevent wrinkles generated on the inner surface of the pipe. However, in reality, it is possible to avoid a fatal defect that the core does not come off. done.
Moreover, this problem can be solved because the unevenness and the like generated due to the non-uniform electroformed layer on the outer surface by the electroforming method are completely covered with the inner diameter of the pipe of the core drawing method.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The core 01 for growing the inner pipe 02 by electroforming is prepared with a stainless steel wire having a diameter of 0.125 mm as shown in FIG. 1a, and installed in the electrolytic bath so that the plating layer grows uniformly on the surface. The inner pipe 02 was constructed as shown in FIG.
The surface of the inner pipe cut along the line connecting the cc points is an electroformed plating layer such as the stainless steel core 01 in the center portion is a perfect circle as shown in FIG. Even if we devised for uniform growth, the finish was far from the exact circle.
In the past, these surface irregularities had to be finished with high precision by mechanical polishing, so there was a defect that increased costs. In the present invention, this inner pipe is shown in cross section in FIG. By combining with the drawing pipe shown in the drawing, it is possible to produce a connection tool without performing a polishing process or the like.
That is, when the pipe 04 before drawing is made through the die 03 to form the outer pipe 05 and its cross section is enlarged and observed, the outer peripheral side becomes a perfect circle as shown in FIG. 2B, but the inner peripheral side 051 has wrinkles.
If the core wire is bitten in order to eliminate this wrinkle, the core wire cannot be pulled out, so that this pipe drawing method is inappropriate as a method of producing a connector.
In the present invention, the principle that the core wire cannot be removed when the core wire is bitten by this drawing method has been applied to provide a method for manufacturing a connector with high accuracy.
That is, as shown in a schematic sectional view in FIG. 3, the pipe material 04 before drawing is suitable for the outer diameter of the target connector (for example, 0.7 mm, 1.25 mm, 2.5 mm, etc.). Various types are put into practical use.) Are loaded into a die 03 having an inner pipe 02 having a stainless steel wire 01 in the core formed by the electroforming method described above at the center, Drawing work was performed, and the unevenness of the outer peripheral surface of the inner pipe 02 and the inner peripheral surface of the outer pipe were entangled and integrated.
FIG. 4 is a diagram of the surface cut by the line connecting the cc in FIG. 3 in the pipe for the connector of the present invention thus produced. As shown in FIG. 4, the outer diameter is drawn with high precision by a die, and the inner diameter is stainless steel. The shape is molded on the uniform surface of the core wire 01, and the finish level is such that there is no need for post-processing.
Further, in the next step, the pipe 05 with the pipe 05 drawn on the surface of the inner pipe 02 having the core wire 01 is cut, and the core wire 01 is pulled out. As is well known, the electroformed plating layer 02 on the surface of the stainless steel wire 01 can be easily extracted due to its properties.
Next, depending on the quality of the metal material used, surface treatment may be performed to improve weather resistance.
That is, it is a necessary condition to perform nickel plating or the like on a material which is easily corroded on a surface having poor weather resistance.
As shown in FIG. 5, the pipe for a connecting tool produced according to the present invention is completed by providing a gentle round at the joint surface with the thin wire, which is provided with an introduction taper at the thin wire insertion port.
[0006]
【The invention's effect】
The pipe for a connector according to the present invention has a pipe with a highly accurate outer peripheral surface formed by a drawing method on the outer side, and the inner pipe is a mold in which the surface of the core wire 01 is transferred by an electroforming method. Since the hollow holes 00 can be finished without any mechanical polishing treatment, a thin wire connector with low production cost can be provided.
[Brief description of the drawings]
FIG. 1 shows a production process of an inner pipe of the present invention by an electroforming method and an enlarged view of a cross section of the pipe.
FIG. 2 is a cross-sectional enlarged view of a pipe in a conventional drawing process by a drawing method.
FIG. 3 shows a production method of the thin wire connector of the present invention.
4 is an enlarged view of a surface cut by a cc arrow in FIG. 3;
FIG. 5 is a cross-sectional view showing an example of a thin wire connector made according to the present invention.
[Explanation of symbols]
00 Hollow hole into which fine wire is inserted 01 Stainless steel core wire 02 Grown plated layer 021 true circle 03 Die 04 Pipe before drawing 05 Pipe 051 after drawing

Claims (2)

A pipe made of a plating layer grown by electroplating on the surface of the core wire is used as a core for the core drawing drawing method, and a pipe made of a predetermined material is made through a die suitable for the outer diameter of the connector. A method for manufacturing a fine wire connector, characterized in that the wire is cut to a predetermined length, the core wire is extracted, finished, and processed. A method for manufacturing a connecting device, wherein the material of the connecting device according to claim 1 is plated so as to improve weather resistance.

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