JPS58102662A - Plane and curved surface processing apparatus - Google Patents

Abstract

PURPOSE:To contrive to allow a machining pin to hold a lens to be trained toward the sphercial center of a tool rest in such a way that a parallel link mechanism is installed on the main link which is rocked by a cracnk in a lens grinder and one end of this link is arranged to slide on a guide member. CONSTITUTION:A main link 10 is swingably driven by a crank 15 through a pin 10. When a main supporting link 20 is rocked on a pin serving as the fulcrum, following rocking of the main link 10, an arm 41 moves integrally with the supporting link 20, instead of turning on a pin 40 serving as the fulcrum. In order to move a machining pin 27, following the surface to be machined of a tool rest by means of a link mechanism consisting of the main link 10 and a main supporting arm 20, the machining pin 27 is moved on a routine such as d1 d2 d1 d3, also a roll member 42 at the free end part of the arm 41 is moved along a guide face 45a, so that it may entirely follow the surface to be machined of the tool rest 3.

Description

[Detailed description of the invention] Related to surface and curved surface machining equipment.

Various lens polishing devices have been proposed in the past, but in order to be able to process everything from flat surfaces to curved surfaces, the existing devices use, for example, weights to move the processing pin along the surface to be processed. However, there was a problem in that the pressure applied from the machining pin to the machined surface was not constant.

Furthermore, since the axis of the machining pin is substantially parallel to the tool axis that supports the tool surface and is not directed toward the spherical center, there is also the problem that the pressure applied from the machining pin to the machining surface is unstable.

The present invention has been made in view of the above circumstances, and its first object is to provide a device that uses a simple link device to move a machining pin substantially following the machining surface. A second object of the present invention is to provide a device that uses a simple link device to move the machining pin almost in a similar manner, and also allows the axis of the machining pin to always be directed toward the spherical center.

The flat and curved surface machining device of the present invention which achieves the above first object has a main link that is oscillated by a drive device erected on a base equipped with a tool axis, and a main support that is approximately horizontal to the main link. Intermediate portions of the links are rotatably connected, a machining pin is provided at one end of the main support link located on the tool axis so as to be movable in the axial direction, and means for pressurizing the machining pin is provided. Further, a roller member is provided at the other end of the main support link, and a guide member whose inclination angle is adjustable is provided on the base to guide the roller member as the main link swings. There is.

The flat and curved surface machining device of the present invention which achieves the above second object has a main link that is erected on a pace provided with a tool axis and that is oscillated by a drive device, and a substantially horizontal The middle part of the main support link is rotatably connected, and the sub-support link, which supports a machining pin movably in the axial direction, is rotatably connected to one end of the main support link located on the front tool axis. A connecting link is provided between the sub-support link and the main link via a bottle, a means for pressurizing the processing pin is provided, and a roller member is provided at the other end of the main support link. , and on the base,
Previous □Record It is characterized by the provision of a guide member whose inclination angle can be adjusted to guide the roller member as the main link swings.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an example of the present invention, and numeral 1 in the figure is a base. On this base 1, a tool shaft 2 is rotatably mounted with its axis vertically via a bearing (not shown). A tool face 3 is attached to the upper end of the tool shaft 2, and the lower end of the tool shaft 2 protrudes below the base 1, and a goury 4 is provided at the lower end. A belt 7 is stretched between the googly 4 and the belt 6 of a motor 5 installed below the base 1, and the motor 5 rotates the tool shaft 2 and the tool face 3.

At a position adjacent to the tool shaft 2 of the base 1, there is a main link 1o.
passes through the base 1 and is erected so as to be swingable via the bin 11. The raw link 10 swings around the bin 11 as a fulcrum by a drive device 12 installed below the base 1. The drive device 12 includes a motor 14 and this motor 1.
4, a crank pin 16 engaged with a diametrical groove 16a of the crank grate 15, and a lower end of the main link 10 protruding downward of the base 1 are connected. When the motor 14 rotates, the crank plate 15, the crank pin 16, and the transmission shaft 1
The rotational-linear motion conversion mechanism 7 converts the motion into linear motion and transmits the motion to the main link 10. Main link 1
The amount of oscillation of o is adjusted by changing the position of the crank pin 16 with respect to the crank grating 15.

An intermediate portion of a horizontal main support link 20 is swingably connected to the upper part of the main link 10 via a pin 21 .

A lower end portion of a sub-support link 23 is connected via a pin 24 to one end portion of the main support link 2o on the tool shaft 2 side (left side in the drawing). A cylinder 25 operated by hydraulic pressure or pneumatic pressure is fixed to this sub-support link 23.
A machining pin 2 is attached to the cylinder rond 26 of this cylinder 25.
7 is provided. The processing pin 27 is moved by the cylinder 25 in its axial direction. Also.

The machining pin 27 is equipped with a holder 29 that holds a lens 28 to be polished by the machining surface 3a of the tool surface 3. Further, one end of a connecting link 30 is rotatably connected to the intermediate height position of the sub-support link 23 via a pin 31. The other end of the connecting link 30 is rotatably connected to a pin 33 movably engaged in an arcuate groove 32a of a block 320 fixed to the upper part of the main link 10. The groove 32a is formed along an arc drawn around the pin 31, and by rotating the connecting link 30 about the pin 31 as a fulcrum, the position of the pin 33 in the groove 32a is adjusted. In addition, pin 3
3 can also be provided directly on the top of the main link 10.

However, in this case, as shown in FIG. 6, when machining the lens, the machining pin 27 (holder 29) momentarily passes over the rotation center axis of the tool surface 3, and the lens is rotated by the tool surface 3. A situation may arise where the polishing is not completed without polishing. In order to avoid this, the position of the pin 33 is adjustable as described above.

A link device 36 is constructed above the main link 10 by the main support link 20, sub-support link 23, connecting link 30, and block 32 (main link 10). As will be described later, this link device 36 is for ensuring that the fine center of the processing pin 27 always points toward the spherical center G (see FIGS. 5a and 5b) when processing the lens 28. It is necessary to achieve the second objective. In order to achieve the first object of the present invention, it is sufficient that the processing pin 27 is supported at one end of the main support link 20 so as to be movable in the axial direction thereof.

An arm 41 is swingably supported on the lower surface of the other end (right side in the drawing) of the main support arm 20 via a pin 40, and a roller member 42 is provided at the free end of this arm 41. ing. The roller member 42 pushes the guide member 4 by a pressing member 43 provided on the upper surface of the other end of the main support link 20.
It is pressed so as not to separate from the substantially flat guide surface 45a of No. 5. Therefore, the roller member 42 reciprocates along the guide surface 45H as the main link 10 swings. A stopper 46 is provided near the pin 40 on the lower surface of the other end of the main support link 20, and this stopper 46 is connected to the pivoting portion of the arm 41 (pin width 0) 91! The rotation of the arm 41 is restricted by contacting the arm 41. That is, when the main support link 20 swings about the pin 21 as the main link 10 swings, the arm 41 moves together with the support link 20 to prevent it from rotating about the pin 40. I have to.

The guide member 45 is swingably supported by a guide support stand 46 erected on the base 1 . A handle portion 478 of an adjustment screw 47 screwed onto the guide support base 46 is engaged with the end of the guide member 45, and the inclination angle of the guide surface 45a is adjusted by the adjustment screw 47. When adjusting the inclination angle, the flang 4B provided on the guide support stand 46 is loosened to make the guide member 46 swingable.

In order to move the machining pin 27 following the machining surface 3a of the tool surface 3 using the link device consisting of the main link 10 and the main support arm 20, as shown in FIG. 2(a), FIG. 3, and FIG. As the main link 10 swings, the other end of the main support link 20 may be moved from C1 to C2 to C1 to C3. As a result, the processing pin 21 moves from d1 to d2 as shown in the figure.
→dB −+ d, and completely follows the machining surface 3a of the tool surface 3. Note that FIG. 2a shows the case of machining a concave curved surface, FIG. 3 shows the case of machining a flat surface, and FIG. 4 shows the case of machining a convex curved surface.

However, in this case, guides matching the movement locus (Ct→Shima→C1→Cs) of the other end of the main support link 20 must be prepared, which is troublesome.

The present invention solves this problem as follows.

That is, a substantially flat guide surface 45a obtained by combining the respective movement trajectories is used. For example, when machining a concave curved surface, instead of moving the other end of the main support link 20 in a concave curve from C1, C2, and C8 as shown in FIG. It is moved along a substantially flat guide 9 surface 452.

Then, the machining pin 27 can be moved substantially following the machining surface 3a of the tool surface 3. When the machining pin 27 moves to the moving point, it is raised by an amount h from its original position [(initial position when completely imitated by the machining surface 3a), but this point is moved by the cylinder 25 to the machining pin 27.
This is solved by suppressing the problem with a constant downward pressure. In this case, at the position d2, the pressure acting on the machining surface 3a from the machining pin 27 changes to be slightly smaller than at the dl position, but since the machining pin 27 is moved almost following the machining surface 3a, it is different from the conventional method. The degree of pressure change is much smaller than in the case of .

Furthermore, when processing a flat or convex curved surface, the other end of the main support link 20 is similarly moved along the substantially flat guide surface 458.

Note that when machining a concave curved surface, a convex curved surface, and a flat surface, the direction and angle of inclination of the guide surface 458 are different, so adjust the direction and angle of the inclination of the guide surface 453 according to the surface to be machined to match the actual one. Minimize the deviation.

This eliminates the need to prepare guides for each.

Next, the operation of the above-mentioned apparatus will be explained with reference to FIGS. 1 and 5.

First, set the lens 28 on the holder 29 and
Place it on top. Then, pressure oil or air is sent to the cylinder 25 to press the lens 28 against the processing surface 3a via the processing bottle 27 and boulder 29. Also, clan 7' 48
, adjust the inclination angle of the guide surface 45a with the adjusting screw 7, and then tighten the clamp 48 again.

In this state, the motors 5 and 14 are driven to rotate the tool face 3, while the main link 1° is swung about the pin 11 as a fulcrum. Then, as shown in FIG. 5, as the main link 1o swings, the roller member 42 at the other end of the main support link 20 reciprocates on the guide surface 45a, thereby causing the one end side of the main support link 20 to move back and forth on the guide surface 45a. The machining bin 27 moves almost following the machining surface 3a of the tool surface 3. At this time,
The axis of the processing bottle 27 is always aligned with the spherical center G by the link device 36.
directed towards. Also, the machining bin 27 is lifted up by h from the future bit (the position when it completely follows the machining surface 3a) at the d2 position, but since the machining bin 27 is moved downward by the cylinder 25, nothing happens. There is no problem. However, in these four positions, the pressure to press the lens 28 against the processing surface via the processing bottle 27 holder 29 is lower than in the other d1 position (a position that completely follows the processing surface 3a and has no deviation). becomes slightly smaller.

In addition, although the said Example showed the case where the processing bottle 27 was pressurized using the cylinder 25, it is not limited to this, For example, a spring or a damper may be used.

As explained above, according to the flat and curved surface machining device of the present invention, by combining a simple link device consisting of a main link and a main support link and a guide member, machining and pins can be moved almost following the machining surface of the tool surface. Since it can be moved, the pressure applied from the processing bottle to the processing surface does not change compared to when the processing bottle is moved along the processing surface by simply using a weight, and lens polishing etc. can be performed better. It is done.

Further, the link device consisting of the main link and the main support link is further combined with a sub support link and a connecting link,
Not only can the machining bottle be moved almost following the machining surface of the tool surface, but the axis of the machining bottle can always be oriented toward the spherical center, which makes the pressure applied from the machining bottle to the machining surface even more stable. , lens polishing, etc. can be done well and accurately, improving processing accuracy.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing one embodiment of the present invention, and FIG.
Figures (a), 3, and 4 are explanatory diagrams explaining the movement locus of the other end of the main support link, Figures 2 (b) and 5 are diagrams explaining the operation, and Figure 6 is an explanatory diagram of the tool. It is an explanatory view of the positional relationship between a surface and a holder. 1... Pace, 2... Tool axis, 3... Tool surface, 1
0... Main link, 11... Pin, 12... Drive device, 20... Main support link, 21... Pin, 23...
- Sub-support link, 24... pin, 25... means for pressurizing (cylinder), 27... processing bottle, 30...
Connecting link, 31. 33... Pin, 42... Roller member, 45... Guide member.

Claims (1)

[Claims] 1. A drive device (
A main link (10) that swings by the main link (12) is erected, and the intermediate part of the main support link (20) is rotatably connected to the main link (10), and the main support link (
A machining pin (20) is provided at one end located on the tool shaft (2) so as to be movable in its axial direction, and a means (25) for pressurizing the machining pin (27) is provided; A roller member (42) is provided at the other end of the main support link (20), and the main link (10) is provided on the pace (1).
A flat and curved surface machining device provided with a guide member (45) whose inclination angle can be adjusted to guide a roller member (42) as the roller member (42) swings. 2. Drive unit on the tool axis (Pace (1) with power!
A main link (10) that swings is erected by a main link (12), and an intermediate portion of a substantially horizontal main support link (20) is rotatably connected to the main link (10). A sub-support link (23) that supports a machining pin (27) movably in the axial direction is rotatably connected to one end located on the tool shaft (2) of 20). (23) and the main link (10), the pin (31
), a connecting link (30) is provided via (33),
Also, the processing pin (means (26) for pressurizing it with two forces)
further provided with a roller member (42) at the other end of the main support link (20), and on the pace (1),
As the main link (10) swings, the roller member (4)
2) A guide member (45) whose inclination angle can be adjusted to guide the
Flat and curved surface processing equipment equipped with