JPH0115453Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to an improvement of a drilling device for drilling relatively small holes of 1 mm or less.

A plug, which is a main component of an optical fiber connector, will be explained as an example. This type of plug has an outer diameter of 2~
It has a cylindrical shape of 4 mm and a length of 6 to 15 mm, and a relatively small hole of 0.05 to 0.15 mm is coaxially bored at one end on the side through which the optical fiber is passed. The coaxiality with respect to the outer diameter of this hole has a significant effect on optical transmission loss, so extremely high precision of 2 μm or less is required. In order to achieve this level of precision, traditionally the drill was rotated at a low speed and the alignment and runout were adjusted while being observed under a microscope during processing. However, in reality, it has been difficult to perform highly accurate centering on the order of 1 μm.

This idea was made in view of the above circumstances, and consists of holding the drilling tool and the workpiece on an X-Y fine movement device, and using these devices to adjust the centers of the two to match each other before machining. It is an object of the present invention to provide a drilling device that can perform extremely high precision machining.

This invention will be explained below based on drawings showing examples.

In FIG. 1, on one end of the base 1,
A slide table 2 is provided so as to reciprocate along a guide 4 by rotation of a feed screw 3 forming a feed mechanism. A rotating shaft of an electric motor 5 fixed to the end of the base 1 is coaxially connected to the feed screw 3. Further, a support body 6 is installed on the slide table 2, and a first X-Y fine movement device 7, which constitutes a second adjustment device, is attached to the side surface thereof facing the tool holder side, which will be described later. There is. This first X-Y fine movement device 7 is used to finely move a workpiece 20, which will be described later, in the X-Y direction along a plane perpendicular to the plane of the paper of FIG. 1, thereby performing precise positioning. Further, a workpiece holder 8 is attached to the first XY fine movement device 7 . On the other hand, at the other end of the base 1, a hydrostatic fluid bearing 9 using, for example, pressurized air as the fluid is installed. Spindle 1 supported by this bearing 9
A second X-Y fine movement device 11, which serves as a first adjustment device, is attached to one end portion of the device 0 facing the support body 6 side. This second X-Y fine movement device 11
This is for finely moving a drill 12, which will be described later, in the X-Y direction along a plane perpendicular to the paper plane of FIG. 1 to perform precise positioning. This second X-Y
A tool holder 13 to which a drill 12 as a drilling tool is fixed is protruded from the fine movement device 11 .
A pulley 14 is attached to the other end of the spindle 10, and the spindle 10 is driven to rotate by a drive device (not shown) installed inside the base 1 via a belt 15 wrapped around the pulley 14. I'm starting to do that. Furthermore, on the base 1, a first
A displacement detector 16 is removably installed.
Further, one end portion of a rod-shaped arm 17 is detachably attached to the spindle 10 via a magnet 18. A second displacement detector 19 is installed at the other end of the arm 17.

Next, the drilling process using the above device will be described.

First, one end of the arm 17 is attached to the spindle 10 using the magnet 18. At this time, the longitudinal direction of the arm 17 is set to be the axial direction of the spindle 10. Next, the tip of the detector 19a of the second displacement detector 19 attached to the other end of the arm 17 is brought into contact with the outer peripheral surface of the cylindrical workpiece 20 held by the holder 8. Next, the spindle 10 is manually rotated, and the workpiece 2 is
Detects 0 runout. Along with this, the first
Adjust this vibration by operating the X-Y fine movement device 7. Also, on the drill 12 side, the runout of the drill 12 is adjusted in the same manner. That is, after removing the arm 17, the first displacement detector 16 is installed on the base 1, the tip of the detector 19a is brought into contact with the cylindrical base of the drill 12, and the spindle 10 is also manually rotated. Then, the runout of the drill 12 is measured. Regarding this swing of mind, please refer to the second X-Y
Adjustments are made by operating the fine adjustment device 11.

After the drill 12 and workpiece 20 are aligned with the axis of the spindle 10 through the above operations, that is, after they are coaxial, the displacement detector 1
If the holes 6 and 19 are removed from the base 1 and drilling is performed, a hole with extremely high coaxiality will be formed in the workpiece 20.

As described above, the drilling device of this invention adjusts the run-out of both the tool and the workpiece, and aligns the centers of both axes before machining, thereby achieving extremely high coaxiality. You will be able to perform high quality processing.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of this invention. 1: Base, 3: Feed screw (feed mechanism), 6: Support body, 7: First X-Y fine movement device (second adjustment device) 10: Spindle, 11: Second X-Y fine movement device (first adjustment device), 12: drill (drilling tool), 16: first displacement detector, 19: second displacement detector, 20: workpiece.

Claims (1)

[Scope of claims for utility model registration] (1) A punching device characterized by having the following configuration. (a) Base. (b) A spindle supported on one end of the base. (c) A drive source that rotationally drives the spindle. (d) A first adjustment device attached to one end of the spindle so that its position can be adjusted along a plane orthogonal to the axial direction of the spindle. (E) A drilling tool held by the first adjustment device and positioned by the first adjustment device at a position coaxial with the spindle. (F) A first displacement detector that is removably installed on the base and detects the runout of the drilling tool with respect to the spindle. (g) A support provided at the other end of the base. (h) A cylindrical workpiece is attached to the support body so as to be freely adjustable in position along a plane perpendicular to the axial direction of the spindle, facing the first adjusting device, and by adjusting the position, the cylindrical workpiece is moved between the spindle and the spindle. A second adjustment device for holding in a coaxial position. (li) A second displacement detector that is rotatably provided around the same axis as the spindle and detects the runout of the workpiece relative to the spindle, which is held by the second adjustment device. (v) A feeding mechanism for moving the spindle forward and backward relative to the support. (2) The drilling device according to claim 1, wherein the second displacement detector is detachably attached to the spindle.