JPH0417282Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention improves the outer periphery of the terminal plug of an optical connector used for optical connection between optical fiber cables or between optical fiber cables and other optical devices. The present invention relates to a tool position adjustment mechanism for a centering machine for optical connectors, which is used to accurately finish a small-diameter hole of a terminal plug or a concentric circle with an optical fiber core portion fixed in a small-diameter hole.

[Prior Art] A conventional tool position adjustment mechanism of this type is shown in FIGS. 5 and 6. In the figure, 10 is a tool holder, 12 is a tool fixed to the tool holder 10, 15 is a tool head base, 17 is a block-shaped laminated piezoelectric element, 18 is a slider, and 19 is a guide provided on the tool head base.

In the conventional tool position adjustment mechanism described above, as shown in FIGS. 5 and 6, each slide 8 carrying the tool holder 1 is moved onto the guide 9 for rough adjustment and fixation, and the two tool tools are adjusted. 2 is fixed to a tool holder 1 having one fulcrum offset from the tool 2, and the position of the tool 2 is finely adjusted by applying a voltage to the block-shaped laminated piezoelectric element 7 through a lead wire 6. I was doing it.

[Problems to be Solved] In the conventional tool position adjustment mechanism described above, the position of each tool is adjusted using each tool holder having one fulcrum, but the fulcrum of the tool holder is Because it is offset, the tool bit moves slightly in the direction of rotation around the fulcrum of the tool holder, and as each tool bit position is adjusted, the cutting angle (rake angle) of the tool tip relative to the workpiece changes.
The drawback is that the surface roughness of the workpiece is likely to deteriorate. Furthermore, since each tool bit is fixed with a set screw after adjusting the position of each tool, there is a drawback that the tool moves slightly when fixed, and does not match the set dimensions in submicron units.

[Means for solving the problem] The present invention solves the above-mentioned conventional problems by aligning the outer periphery of the terminal plug with respect to the small diameter hole of the terminal plug of the optical connector or the central axis of the optical fiber core fixed to the small diameter hole. In the tool position adjustment mechanism of a centering machine that processes concentrically with two or more tools, a ring-shaped laminated piezoelectric element is provided on the tool head base, and the tool bit is fixed within the ring-shaped layered piezoelectric element, which is elastically deformable. It consists of installing a tool holder.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1a is a plan view of a cutting tool position adjustment mechanism according to an embodiment of the present invention, FIG. 1b is a side sectional view of the cutting tool position adjustment mechanism according to an embodiment, and FIG. It is a perspective view of the tool holder of a position adjustment mechanism.

First, the principle of the block-shaped laminated piezoelectric element shown in FIG. 3 will be explained. In FIG. 3, ceramic layers 20 with high piezoelectricity and internal electrode layers 21 are alternately laminated, and each internal electrode layer 21 is electrically connected in parallel by an external electrode 22 on the side surface of the piezoelectric element. When a voltage is applied to the external electrode 12 of the block-shaped laminated piezoelectric element having such a structure, the piezoelectric element extends in the longitudinal direction due to the piezoelectric longitudinal effect. For example, when DC100V is applied to a piezoelectric element with a cross section of 2 x 3 mm, a length of 10 mm, and a distance between internal electrodes of 100 μm, it will extend by about 9 μm.
The stress generated at this time is as large as 350Kg/cm ² (according to a report by the Piezoelectric Ceramic Actuator Application Research Group).

The block-shaped laminated piezoelectric element is thermally pressed by a green sheet method, and since this pressed body is an unsintered body, it can be easily machined. Therefore, it is also possible to manufacture a ring-shaped laminated piezoelectric element as shown in FIG. 4 (according to Japan Industrial Technology Center, Essentials of Piezoelectric Actuator Development and Application).

The ring-shaped laminated piezoelectric element shown in FIG.
It basically has the same characteristics as the block-shaped laminated piezoelectric element shown in the figure, and when a voltage is applied, its diameter is reduced by a certain length ΔD as shown in FIG. 4b.

A cutting tool position adjustment mechanism according to an embodiment of the present invention uses the ring-shaped laminated piezoelectric element to adjust the tooling tool, as shown in FIGS. 1a, b and 2 below. I will explain.

The cutting tool position adjustment mechanism of this embodiment uses a ring-shaped laminated piezoelectric element 3 provided on the cutting tool head base.
, a cutting tool holder 1 held by the ring-shaped laminated piezoelectric element 3, and two cutting tools 2 fixed to the cutting tool holder 1 in advance. The tool holder 1 has a plurality of slits 4 radially inserted therein, for example, like a collector chuck, and is an elastic body that deforms and contracts in accordance with the contraction of the ring-shaped laminated piezoelectric element 3.

The cutting tool 2 shown in FIG. 2 is roughly fixed to the cutting tool holder 1 using a separate jig and is fitted into the ring-shaped laminated piezoelectric element in a state before voltage is applied.

Next, a bias voltage is applied to the ring-shaped laminated piezoelectric element 3 to hold the tool holder 1, and then the applied voltage is further controlled to indirectly move the tool 2 slightly. As a result, the cutting tools 2 move slightly in the direction of the central axis of the ring-shaped laminated piezoelectric element 3 in submicron units, and each cutting tool 2 maintains the relative positional relationship.

Therefore, it is possible to easily adjust the position of the cutting edge spacing in submicron units, and stable cutting conditions can be obtained.

Further, the position adjustment work can also be easily performed by adjusting the applied voltage.

[Effects of the invention] As explained above, according to the invention, by applying a constant voltage using a ring-shaped laminated piezoelectric element, it is possible to make minute adjustments of the cutting tool in submicron units, making position adjustment work easier. can be done. In addition, since the cutting angle of the cutting edge of the cutting tool relative to the workpiece does not change when adjusting the cutting tool position, the problem that the surface roughness of the workpiece tends to deteriorate as in the past is eliminated. On the other hand, the structure is simple,
Since it can be easily made smaller and lighter, and the same cutting precision as the conventional method can be obtained, it has the effect of making it possible to perform centering processing at the installation site.

[Brief explanation of the drawing]

FIG. 1a is a plan view of a cutting tool position adjustment mechanism according to an embodiment of the present invention, FIG. 1b is a side sectional view of the tooling tool position adjustment mechanism according to an embodiment, and FIG. FIG. 3 is an external view of a block-shaped laminated piezoelectric element, FIG. 4a is a perspective view of a ring-shaped laminated piezoelectric element used in the present invention, and FIG. FIG. 5 is a plan view of a conventional cutting tool position adjusting mechanism, and FIG. 6 is a perspective view of a cutting tool holder and a slider of the conventional cutting tool position adjusting mechanism. 1... Bit holder, 2... Bit, 3... Ring-shaped laminated piezoelectric element, 4... Slit, 10...
Bit holder, 12... Bit, 15... Bit head base, 17... Block-shaped laminated piezoelectric element, 20... Ceramic layer, 21... Internal electrode layer.

Claims (1)

[Scope of claim for utility model registration] With respect to the small diameter hole of the terminal plug of the optical connector or the central axis of the optical fiber core fixed to the small diameter hole,
In the tool position adjustment mechanism of the centering machine that processes the outer periphery of the terminal plug into concentric circles using two or more tools, a ring-shaped laminated piezoelectric element is provided on the tool head base, and the tool tool is inserted into the ring-shaped layered piezoelectric element. A tool position adjustment mechanism characterized by installing a fixed and elastically deformable tool holder.