JPH06192899A - Production of tapered wire for polishing micropore - Google Patents

Abstract

PURPOSE:To produce a tapered wire having a tapered part and a straight part with good productivity at the time of producing the tapered wire for polishing micropores by electrolytic polishing by adjusting the amt. of electrolytic current to be applied or the conveying speed of the material wire. CONSTITUTION:A steel wire WA is rewound from a rewinding reel 1, brought into contact 'with a guide roller 2 as one electrode, passed through a Pb cathode cylinder 9 in a sulfuric acid elecrtolyte 8 in an electrolytic cell 3 and electrolytic polished. In this case, a current to be applied between the roller 2 and the cylinder 9 is gradually decreased to decrease the polishing amt. of the electrolyte or the traveling speed of the wire WA in the electrolyte is gradually increased and then fixed, and an intermediate wire WB provided with a tapered part 10 and a straight part 11 is formed. The process is repeated to prepare a continuous wire having plural intermediate wires WB, which is passed through a cleaning tank 4 and a drier 5 and wound on a reel 7. The continuous wire is cut into plural intermediate wires WB, and a tapered wire is produced with good productivity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a ferrule for an optical fiber connector made of a hard and brittle material such as ceramics and ruby, and a tapered wire used for polishing fine holes formed in a bearing for a watch. It is a thing.

[0002]

2. Description of the Related Art Generally, a taper wire 22 composed of a taper portion 20 and a straight portion 21 as shown in FIG. 3 is used for polishing a hole of a hard and brittle material. This taper wire 22 is designed so that the taper portion 20 gradually polishes the hole wall to a predetermined hole size, the straight portion 21 adjusts the hole size, and the surface condition of the hole wall is polished to a desired finished state. ing.

The taper wire 22 is used for polishing a hole of a hard and brittle material in the state shown in FIG. In the figure, reference numeral 30 denotes a hard and brittle material, which has a pre-drilled hole. A plurality of the hard and brittle materials 30 are arranged in parallel, and the tapered wires 22 are inserted into the holes to connect the beads, and an abrasive material such as diamond die powder is interposed between the hole walls and the wires. Then, by rotating and reciprocating the hard and brittle material 30 while traveling along the wire 22, the wire 22 is pressed and slid on the hole wall together with the abrasive, and the hole wall is polished.

The taper wire 22 as described above is generally formed by cutting a wire rod drawn to a required wire diameter into a required length of about 10 to 15 m, and then hanging the required length from one end of the wire rod into an electrolytic solution. It is manufactured by immersing and adjusting the immersing time to adjust the amount of corrosion in the longitudinal direction of the wire to form a tapered portion having a required dimension.

[0005]

In the case of the above-mentioned conventional manufacturing method, the wire rod is cut into a required length and then electrolytically polished to form a taper portion for each wire, so that the work is very complicated. is there. That is, in the case of the above-described conventional manufacturing method, a step of winding on a reel at the time of cutting, a step of introducing into an electrolytic solution at the time of electrolytic polishing and a step of taking back are required, and the steps are complicated, which makes the work complicated. . In addition, it is necessary to apply tension to the wire rod in order to properly adjust the amount of corrosion of the wire rod during electrolytic polishing, and the work is complicated because measures such as attaching a weight to one end of the wire rod are taken.

Further, according to the above conventional manufacturing method, since no treatment is applied to the straight portion, the surface skin of the straight portion remains in a very smooth surface state in which the wire is drawn up. The surface condition of the hole wall is closely related to the polishing force,
The polishing force varies depending on the state of the abrasive brought into the hole, that is, the surface state of the straight portion of the wire. Therefore, in order to finish the surface condition of the hole wall as desired, it is necessary to appropriately adjust the surface texture of the straight portion, but this adjustment is left to chemical treatment and mechanical treatment to be separately performed. Therefore, the work is complicated and the manufacturing cost is high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of manufacturing a tapered wire for polishing fine holes, which has excellent workability and can reduce the manufacturing cost.

[0008]

A method of manufacturing a tapered wire for polishing fine holes according to the present invention comprises: running a wire in an electrolytic solution; and electrolytically polishing the wire while adjusting the amount of corrosion of the wire. After forming a wire having a taper portion and a substantially straight portion repeatedly, the wire is cut into a required length, and the above object is achieved by this structure.

In the above construction, when electrolytic polishing is performed, it is possible to adjust the amount of corrosion of the wire by changing the amount of current and the traveling speed of the wire, and it is possible to change either one in operation. It is suitable.

[0010]

According to the manufacturing method of the present invention having the above structure,
At least until the electrolytic polishing step is completed, the manufacturing process can be continuously performed by a series of steps, so that the labor required for paying out and winding can be remarkably reduced as compared with the conventional method, and the workability is improved. Further, since the wire is passed through the electrolytic solution, the surface skin of the substantially straight portion can be freely adjusted during electrolytic polishing.
No separate adjustment is required, which improves workability and reduces manufacturing costs.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a schematic explanatory view of an apparatus in an electrolytic polishing step, in which a payout reel 1 is wound with a wire WA to which a required wire diameter is given by wire drawing. This wire W
A is guided to the electrolytic bath 3 by the guide roller 2, and then wound on the take-up reel 7 via the washing bath 4, the drying device 5, and the guide roller 6. An electrolytic solution 8 is placed in the electrolytic bath 3.
And a cathode tube 9 energized by the cathode is submerged in the liquid 8. Further, the guide roller 2 is energized with an anode so that when the wire WA passes through the electrolytic solution 8, electrolytic polishing is performed. Sulfuric acid is used as the electrolytic solution 8 and a lead tube is used as the cathode tube 9.
Although the washing tank 4 is charged with hot water and is washed with hot water, it may be subjected to neutralization treatment with an alkali. An insulating roller is used as the guide roller 6.

Next, an embodiment of the manufacturing method of the present invention using the above electropolishing apparatus will be described below.

(Embodiment 1) A steel wire WA having a wire diameter of 0.125 mm is fed from a feeding reel 1 at a constant speed of 2 m / min, and is brought into contact with a guide roller 2 which is energized with an anode, and an electrolytic solution 8 in an electrolytic cell 3 I let it pass through. The current value for energizing the guide roller 2 was set to 80 A, and then the current value was gradually decreased to 5 A or less in 4 minutes to form a taper portion 10 having a taper ratio of 0.025 mm / 8 m on the wire WA. After that, the current value was not changed for 3 minutes, and a substantially straight portion 11 having a length of 6 m was formed on the wire WA so as to be continuous with the tapered portion 10. Electrolytic polishing is performed while repeatedly adjusting the current value as described above to form the intermediate wire WB as shown in FIG. 2, which is washed and dried, and then temporarily wound on the reel 7, and then the intermediate wire WB is cut. Taper 10
And the taper wire which has the substantially straight part 11 was obtained.

(Embodiment 2) A steel wire WA having a wire diameter of 0.125 mm is unwound from a unwind reel 1 and in a electrolytic solution 8 in an electrolytic cell 3 while being in contact with a guide roller 2 which is anodically energized at a constant current value of 60 A. Passed through. The passing speed of the wire WA in the electrolyte 8 is gradually increased from 1.5 m / min to 40 m / min after 8 m.
A taper part 10 with a taper ratio of 0.025 mm / 8 m
Was formed. After that, a speed of 40 m / min was maintained for 4 seconds, and a substantially straight portion 11 having a length of 6 m was formed on the wire WA continuously from the tapered portion. Electrolytic polishing is performed while repeatedly adjusting the traveling speed of the wire WA as described above to form the intermediate wire WB as shown in FIG. 2, which is washed and dried, and then temporarily wound on the reel 7 and then the intermediate wire WB. WB was cut to obtain a tapered wire having a tapered portion 10 and a substantially straight portion 11.

In each of the above embodiments, when the surface skin of the substantially straight portion is formed in a desired state, the surface roughness Rt = is obtained by appropriately adjusting the electrolytic solution concentration, the current value, the wire traveling speed and the like.
It is possible to make it coarse or fine in the range of about 0.2 to 1.2 μm.

[0016]

According to the present invention, since the taper portion is continuously formed in-line by electropolishing, the number of man-hours required for repetition, winding and transporting is about half that of the conventional method, and the labor required is remarkably high. The tapered wire for polishing fine holes can be manufactured with reduced workability and productivity.
In addition, since the surface texture of the substantially straight portion can be freely adjusted during electrolytic polishing, no separate adjustment is required, and the workability can be improved and the manufacturing cost can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an electrolytic polishing apparatus used in an example of the present invention.

FIG. 2 is an intermediate wire W obtained in Examples 1 and 2 of the present invention.
It is a schematic diagram of B.

FIG. 3 is a schematic view of a conventional tapered wire.

FIG. 4 is a schematic explanatory view showing a hole polishing processing state with a tapered wire.

[Explanation of symbols]

 1 Feeding Reel 2, 6 Guide Roller 3 Electrolytic Tank 4 Cleaning Tank 5 Drying Device 7 Take-up Reel 8 Electrolyte 9 Cathode Cylinder 10 Tapered Part 11 Almost Straight Part WA Wire WB Intermediate Wire

Claims (3)

[Claims] 1. A wire is passed through an electrolytic solution, and electrolytic polishing is performed while adjusting the amount of corrosion of the wire.
A method for producing a tapered wire for polishing fine holes, comprising forming a wire having a taper portion and a substantially straight portion repeatedly in the longitudinal direction and then cutting the wire. 2. The method for manufacturing a tapered wire for polishing fine holes according to claim 1, wherein the amount of corrosion of the wire is adjusted by changing the amount of current. 3. The method for producing a tapered wire for polishing fine holes according to claim 1, wherein the running speed of the wire is changed to adjust the amount of corrosion of the wire.