JPS6346221Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The invention provides a lens surface roughening machine, more specifically, prior to polishing a lens to be processed using a polishing machine.
This invention relates to a lens spherical surface roughening machine for processing a spherical surface by roughening.

(Prior Art) In the conventional lens spherical surface roughening machine, as shown in FIGS. 8A and 8B, a workpiece spindle 102 to which a lens holder 101 is fixed is moved in the directions of arrows a and b by means of a guide rail 104 on a main body base 103. A grindstone spindle 106 is mounted on the main body base 103 by a swivel shaft 107 so as to be swingable in the directions of arrows c and d. And in the state before lens processing,
The work axis (the axis of the lens holder 101 to which the lens to be processed 108 is attached) 109 orthogonal to the swivel axis 107 is aligned with the grindstone axis (the axis of the grindstone spindle 105 to which the grindstone 110 is attached) 111, so that during lens processing, In the case, the workpiece spindle 10
2 moves forward in the direction of arrow a toward the grindstone stock 106, and the lens 108 to be processed comes into contact with the grindstone 110. In this state, the grindstone stock 106 performs a swinging motion about the swivel shaft 107.

By the way, in the lens spherical roughening machine mentioned above,
Since the centerline 112 of the sliding part of the workpiece spindle 102 relative to the main body base 103 and the workpiece axis 109 are on the same line, the grinding fluid applied to the lens to be processed 108 and the grindstone 110 during lens processing is applied to the main body base 103. It gets stuck on the upper part on which the workpiece spindle 102 slides, that is, the two guide rails 104 and the part sandwiched between them. This grinding fluid contains abrasives, glass chips, and the like, and it is undesirable for it to come into contact with the sliding portion.
Furthermore, since the grinding fluid applied to the sliding part stagnates in this sliding part due to the presence of the two guide rails 104, the main body base 103 and the workpiece spindle 1
It was very difficult to remove the grinding fluid that had accumulated in the deep part between the two.

(Purpose) The purpose of the present invention is to provide a lens spherical surface roughening machine that prevents grinding fluid from directly coming into contact with the sliding part of the workpiece spindle.

(Overview) The lens spherical surface roughening machine of the present invention has a workpiece shaft lower table and a grindstone shaft lower table provided on the main body base, and a workpiece shaft upper table with a lens holder fixed thereon and a grindstone shaft upper table with a grindstone spindle fixed thereon. The center line of the sliding part of both upper stands is located away from the work axis (work holder axis) and the grinding wheel axis (grinding wheel spindle axis), and the sliding part is covered with a bellows. It is ivy.

(Example) Hereinafter, the present invention will be explained based on the illustrated example.

Figures 1 and 2 show an embodiment of the lens spherical surface roughening machine of the present invention. In FIGS. 1 and 2, a lens holder 2 that holds a lens to be processed 1 and a motor 4 that transmits rotational force to a rotating part of the lens holder 2 via a belt 3 are fixed to a workpiece shaft support 5. As shown in FIGS. Further, a grindstone spindle 7 that holds a grindstone 6 for processing the lens 1 to be processed, and a motor 9 that transmits rotational force to the rotating shaft of the spindle 7 via a belt 8 are fixed to a grindstone top stand 10. There is.

The work shaft upper stand 5 has a work shaft lower stand 12 fixed to the main body base 11, a guide 21, a rail 22,
It is slidably attached via a sliding guide mechanism consisting of a servo motor 23, etc., and the above-mentioned grindstone shaft upper stand 10 is attached to a grindstone spindle lower stand 13 which is slidably provided on the main body base 11, with a guide 31, a rail 32, It is slidably attached via a sliding guide mechanism consisting of a servo motor 33 or the like. The axis of the lens holder 2, that is, the work axis 14,
The axis of the grindstone spindle 7, that is, the grindstone spindle 15
The workpiece spindle stand 5 and the grindstone spindle stand 10 are configured to slide by the sliding guide mechanism in a state where they are aligned. The grindstone shaft lower stand 13 is configured to swing on the main body base 11 about a swivel shaft 16 provided between the main body base 11 and perpendicular to the work shaft 14 and the grindstone shaft 15. The drive mechanism for performing this swinging motion includes a motor 17 fixed to the main body base 11 by a bracket 11A, a small gear 18 fixed to the drive shaft of the motor 17, and a drive mechanism fixed to the grindstone shaft lower stand 13. It consists of a large gear 19 that transmits the rotation of the small gear 18 to the grindstone shaft lower stand 13. A guide portion 20 is formed on the main body base 11 to guide the swinging movement of the grindstone shaft lower stand 13.

The sliding guide mechanism provided between the upper grindstone spindle stand 10 and the lower grindstone spindle stand 13 is constructed as shown in FIGS. 3 to 5. That is, as shown in FIGS. 3 to 5, four guides 31 are fixed to the lower surface of the whetstone shaft upper stand 10, and these guides 31 are fixed to the lower surface of the whetstone shaft lower stand 13.
It is slidably placed on two rails 32 fixed above. In addition, on the lower surface of the grinding wheel spindle top stand 10,
A well-known ball screw nut 34 having a steel ball in an internal thread groove is fixed at a central position equidistant from the position where the four guides 31 are arranged.
The above two rails 3 are attached to the ball screw nut 34.
A ball screw 35 parallel to these rails 32 is screwed together at an intermediate position between the two rails 32, and the ball screw 35 is rotatably supported by a support member 36 on the lower grindstone shaft 13, and is connected to a servo motor 33 fixed to the lower grindstone shaft 13. It is connected to the drive shaft by a coupling 37. Therefore, as for the operation of this sliding guide mechanism, when the servo motor 33 performs rotational driving, the ball screw 35 rotates, the ball screw nut 34 is fed, and the grindstone spindle table 10 slides on the rail 32. The central axis of the ball screw 35, that is, the 2
The center line 38 of the sliding part in the sliding guide mechanism constructed between the book rails 32 is parallel to the grindstone shaft 15 and located at a relatively large distance from the grindstone shaft 15. Further, the sliding guide mechanism provided between the work shaft upper table 5 and the work shaft lower table 12 is configured similarly to the sliding guide mechanism shown in FIGS. 3 to 5 above, and the servo motor 23 rotates. Then, the work shaft table 5 slides on the rail 22. Sliding part center line 28 in the sliding guide mechanism of this workpiece spindle
(see Fig. 1) coincides with the center line 38 of the sliding part in the sliding guide mechanism of the grindstone head, so the center line 28 of the sliding part is also parallel to the work shaft 14, and the work shaft 14 It is located relatively far away from the

In this way, the workpiece shaft 14 and the grindstone shaft 15 are spaced apart from the sliding center line 28 in the sliding guide mechanism of the workpiece spindle and the sliding part center line 38 in the sliding guide mechanism of the grindstone spindle, respectively. The reason for this is to prevent the grinding fluid used during lens processing from coming into contact with the sliding guide mechanism. Furthermore, bellows 29 and 39 are provided on each sliding guide mechanism in order to prevent the grinding fluid from directly contacting the two sliding guide mechanisms,
The bellows 29 covers between the two rails 22 that are exposed to the outside between the workpiece spindle upper stand 5 and the workpiece spindle lower stand 12, and the bellows 39 covers the two rails 32 that are exposed to the outside between the grindstone spindle upper stand 10 and the grindstone lower stand 13. It covers the space between.

In addition, the surface of the main body base 11 is high at the part where both the sliding guide mechanisms are located, and from the lens processing position centering on the work shaft 14 and the grindstone shaft 15 to the front side of the main body base (lower side in FIG. 1). The parts are formed low. A discharge hole 30 for discharging used grinding fluid is provided at a position before the swivel shaft 16 where lens processing is performed.

As described above, since the lens spherical surface roughening machine of this embodiment is configured, when the servo motors 23 and 33 rotate during lens processing, the work shaft upper table 5 and the grindstone shaft upper table 10 are moved to their respective sliding guides. The mechanism causes the lenses 1 to be processed to slide toward each other along the center lines 28 and 38 of the sliding parts, and the lens 1 to be processed held in the lens holder 2 is in contact with the grinding wheel 6 held in the grinding wheel spindle 7. Sliding stops.
Then, the lens holder 2 is rotated by the rotation of the motor 4.
rotates, the rotation of the motor 9 rotates the grindstone spindle 7, and the rotation of the motor 17 causes the lower grindstone shaft base 13 to swing around the swivel shaft 16, thereby roughening the spherical surface of the lens 1 to be processed. Printing is done. During this lens processing, grinding fluid is applied to the processing surface of the lens 1 to be processed, but the work shaft 14 and the grindstone shaft 15 are located at a position away from the sliding guide mechanism of the work shaft top table 5 and the grindstone shaft top table 10. Because of this, the grinding fluid does not come into contact with the sliding guide mechanism directly, and even if the grinding fluid splashes, the droplets are blocked by the bellows 29 and 39, and the sliding guide mechanism is free from the grinding fluid. You won't get wet due to the water. Further, the used grinding fluid flows down to the front side of the main body base 11, that is, the opposite side of the position where the sliding guide mechanism is provided, and
The liquid is easily discharged from the discharge hole 30 without remaining on the surface of the liquid.

In the lens spherical surface roughening machine of the above embodiment, the servo motor 23 is used as the driving source for sliding the workpiece spindle table 5 and the grindstone spindle table 10 along the sliding part center lines 28 and 38 by their respective sliding guide mechanisms.
33 is used, however, in addition to using electric power as the driving source for sliding the workpiece spindle table 5 and the grindstone spindle table 10, hydraulic pressure or pneumatic pressure may be used.

FIGS. 6 and 7 show a sliding guide mechanism in which the grindstone spindle table is slid by hydraulic pressure or air pressure. Grinding wheel spindle stand 50 shown in FIGS. 6 and 7
At a position away from the grindstone shaft 15 , a guide portion 52 is formed on the lower surface of the grindstone shaft upper stand 50 and protrudes from the grindstone shaft lower stand 51 . A sliding contact portion 53 in the form of a so-called dovetail groove is formed to fit into the grinding wheel shaft 15 and slidingly guide the grinding wheel shaft upper stand 50 in a direction parallel to the grinding wheel shaft 15 . Then, the guide section 52
The center of the sliding contact part 53 is the sliding part center line 38, and a cylinder 54 operated by hydraulic pressure or pneumatic pressure is installed at one end of the grinding wheel spindle table 50, coinciding with the sliding part center line 38. A piston rod 55 is connected. Therefore, by controlling the oil pressure or air pressure of the cylinder 54 fixed to the lower grindstone shaft 51, the piston rod 55 is driven, and the upper grindstone shaft upper stand 5 is driven.
0 slides on the grindstone shaft lower stand 51 along the sliding center line 38. Such a sliding guide mechanism using hydraulic pressure or pneumatic pressure is similarly configured for sliding guide of the workpiece shaft upper table and the workpiece shaft lower table.

(Effects of the invention) As described above, according to the invention, since the lens processing part is located away from the sliding parts of the workpiece spindle and the grinding wheel stock, and the sliding parts are covered with bellows, the grinding Liquid will not come into contact with the sliding parts. Also,
The grinding fluid used for lens processing exhibits excellent effects such as being able to be easily removed from the main body base without accumulating deep within the main body.

[Brief explanation of the drawing]

1 and 2 are a plan view and a front view, respectively, of a lens spherical surface roughening machine showing an embodiment of the present invention, and FIG. 3 shows a sliding guide mechanism for the grinding wheel spindle stand in FIG. The plan view shown in FIG. 4 is a sectional view taken along the - line in FIG. 3, and FIG.
Left side view of the sliding guide mechanism shown in Fig. 3 above, No. 6
The figure is a plan view showing another example of the sliding guide mechanism used in the present invention, FIG. 7 is a left side view of the sliding guide mechanism shown in FIG. 6, and FIGS. 8A and B are conventional They are a plan view and a left side view, respectively, showing an example of a lens spherical surface roughening machine. 1,108... Lens to be processed, 2,101...
Lens holder, 4... Lens holder rotation motor, 5... Work shaft table, 6... Grindstone, 7...
Grinding wheel spindle, 9... Grinding wheel spindle rotation motor, 10, 50... Grinding wheel spindle stand, 11...
Main body base, 12... Work shaft lower stand, 13, 51
... Grinding wheel shaft lower stand, 14,109 ... Work shaft, 1
5,111... Grinding wheel shaft, 16,107... Swivel shaft, 17... Grinding wheel shaft lower stand rocking motor, (21,
31... Guide, 22, 32, 104... Rail) (sliding guide mechanism), 23, 33... Sliding servo motor, 28, 38, 112... Sliding part center line, 29, 39... Bellows , (52...guidance department, 5
3...Sliding contact part) (sliding guide mechanism).

Claims (1)

[Scope of Claim for Utility Model Registration] A work shaft upper stand to which a lens holder for fixing a lens to be processed and a motor for rotating the lens holder are fixed, a work shaft lower stand fixed to the main body base, and the above work shaft upper stand. The center line of the sliding part is provided between the work shaft lower stand and the work shaft which is the axis of the lens holder, and the sliding part center line is provided between the work shaft lower stand and the work axis upper stand. a first sliding guide mechanism for guiding in a direction parallel to the grinding wheel; a grinding wheel spindle table to which a grinding wheel spindle for fixing the grinding wheel and a motor for rotating the spindle are fixed; A lower grindstone shaft is provided on the main body base so as to be swingable around a swivel shaft perpendicular to the grindstone shaft, and the grindstone shaft is provided between the upper grindstone shaft and the lower grindstone shaft. a sliding part center axis located at a position away from the grinding wheel shaft, and guides the grinding wheel spindle upper stand in a direction parallel to the grinding wheel spindle relative to the grinding wheel spindle lower stand with the grinding wheel spindle aligned with the workpiece axis. A lens spherical surface roughening device comprising: a sliding guide mechanism according to item 2; and a bellows that covers the first and second sliding guide mechanisms and prevents grinding liquid or the like from entering the inside thereof. Machine.