JPH0480788B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a work holding device used in a processing machine that processes works such as optical elements and molds.

[Conventional technology]

A workpiece holding device used in a processing machine for processing a workpiece such as an optical element or a mold is configured as shown in FIG. 10, for example. That is, the figure shows the principle diagram of the patent application filed by the applicant on October 31, 1986. In the figure, 1 is the workpiece,
It is held by a workpiece support part 3 supported by a U-shaped upper arm 2. 4 is the workpiece support shaft. Atsupah arm 2
is connected via a support shaft 6 to a swinging arm 5 formed in a U-shape in plan, and the swinging arm 5
is connected to the stay 8 via a support shaft 7. If the axis of the support shaft 7, which is the center of rotation of the swing arm 5, is X, the axis of the support shaft 6, which is the center of rotation of the upper arm 2, is Y, and the axis of the workpiece support shaft 4 is Z, then each axis X , Y, and Z are set so that they intersect at one point 0.

FIG. 11 is a diagram for explaining conditions for stably processing the workpiece 1. In the figure, point P is a point on the outer periphery of workpiece 1, and the line segment PH
is the tangent at point P. Further, point H indicates the intersection of the central axis of the workpiece 1, that is, the axis Z of the workpiece support shaft 4 in FIG. 10, and the tangent at the point P. In Figures 10 and 11, the first
By aligning the intersection 0 in Figure 0 with or sufficiently close to the point H in Figure 11, the workpiece 1
can be stably processed.

The first configuration example is a more specific version of the above principle configuration.
Shown in Figure 2 a and b. Fig. 12a shows an example of a configuration in which a convex-shaped workpiece 1 is held on a workpiece support part (applying plate, lens holder, etc.) 3, and Fig. 12b shows a configuration example in which a concave-shaped workpiece 1 is held on a workpiece support part 3. Part 3
This shows an example of a configuration in which the As shown in the figure, in both figures, the intersection point 0 of the three axes, which corresponds to the 0 point in FIG. The structure is such that stable workpiece holding and processing can be performed by placing them close to each other (including coincident).

Therefore, according to the configuration shown in FIGS. 12a and 12b, the 0 point shown in FIG. 10 and the H point shown in FIG.
The points can be made sufficiently close to each other, and the workpiece 1 can be stably machined along the convex and concave surfaces of the workpiece 1.

[Problems to be solved by the invention] In the prior art shown in Figures 12a and b,
As shown in the figure, by changing the height dimension in the axis Z direction of the workpiece support part 3 consisting of a pasting plate, a lens holder, etc., the point 0 and point Efforts have been made to bring the H and H points sufficiently close together.

However, since the workpiece support part 3 is supported by the upper arm 2 via the bearing 10, the amount of adjustment of the workpiece support part 3 in the axis Z direction is regulated by the lower end Q of the bearing 10, so that machining is not possible. There was an inconvenience that the radius of curvature of the workpiece 1 was limited to a narrow range. In this case, a configuration may be considered in which the height of the upper arm 2 is set large in advance and the adjustment range of the workpiece support section 3 is set large. However, in this case,
Swinging motion (circle, arc, ellipse, straight line, etc.) of the upper shaft section located at the top of stay 8 (see Figure 10)
When attempting to process the workpiece 1, the upper arm 2 around the support shaft 6 and the support shaft 7 is
The moment of inertia (the moment of inertia due to the weight of the upper arm 2, which is composed of the weight of the upper arm 2 itself, the weight of the bearing 10, etc.) becomes extremely large, and undesirable force acts on the machining surface when the workpiece 1 is oscillated. This results in the inconvenience that proper processing cannot be performed.

For the above reasons, the height of the upper arm 2 cannot be set large, so when processing multiple workpieces 1 with greatly different radii of curvature, it is necessary to prepare multiple upper arms 3, which increases the number of man-hours for setup changes and manufacturing costs. There was a problem in that it required high costs.

In addition, when machining is performed using a plurality of upper arms 2, the height of each upper arm 2 is different, so the position of the lower end of the upper arm 2, that is, the lower end Q of the bearing 10 is different from that of the work holding device or the upper arm 2. Therefore, when performing automated processing, there was a problem that the equipment and take-out position of the workpiece 1 using an autoloading device etc. were different, making it impossible to adapt to automation.

The present invention has been developed in view of the problems of the prior art described above, and uses the minimum number of workpiece holding devices to accommodate a wider range of curvature radii without creating any inconvenient machining conditions. The purpose is to provide a work holding device that is easy to handle.

[Means for solving problems]

In the figure, processing machines such as polishing equipment (not shown)
A stay member 20 is fixed to and supports the machining pressure applied during machining of a workpiece, and a stay member 20 is rotatable about the axis of the first support shaft via a first support shaft 21 on the lower end side of the stay member 20. supported by the first support shaft 2
The swing arm 2 has a second support shaft 24 having an approximately U-shape with the symmetrical axis 1 as the symmetrical axis, and has an axis Y intersecting the axis X of the first support shaft 21 at its tip.
There are 2.

The second support shaft 2 is provided at both ends of the swing arm 22.
4, a pair of legs 23a each rotatably supported around the axis of a second support shaft;
There is an upper arm 23 that can form a substantially U-shape or a substantially H-shape (not shown) from the horizontal portion 23b connecting between the upper arms 3a. One end of a work support part 26 that holds a work 25 is supported on the horizontal part 23b of the upper arm 23 via a support part 27, and the work 25 is configured to be rotatable via the work support part 26. There is.

As mentioned above, the axis of the first support shaft 21 of the swing arm 22 is set to
Let Y be the axis of the support shaft 24, and Z be the rotational axis of the workpiece 25.The axes X, Y, and Z are set to intersect at one point 0.

The position of the first support shaft 21, the position of the second support shaft 24, and the position of the support part 27 are the same as those of the work support part 2.
6 in the axial direction, that is, in the direction of the rotational axis of the workpiece,
It is configured to be movable in an analog or digital manner. In addition, the leg portion 23 of the upper arm 23
When connecting a and the horizontal part 23b via the connecting part 28, the position of the connecting part 28 is the same as that of the work supporting part 2.
6, that is, the rotational axis direction of the workpiece.

[Effect]

In the above configuration, the workpiece support section 26 holding the workpiece 25 is moved in the axial direction by the adjustment mechanism, so that stable machining can be performed over a wide range of curvature radii of the workpiece. .

Specifically, in the case where the first and second support shafts 21 and 24 or the support section 27 of the workpiece support section 26 or the upper arm 23 are configured via the connection section 28, at least one By appropriately moving and adjusting the position in the axial direction of the workpiece support portion 26 (that is, in the rotational axis direction of the workpiece), point 0 and point H shown in FIGS. 10 and 11 can be brought sufficiently close to each other. or,
By changing the mounting positions of the workpiece support shaft 27, the second support shaft 24 and the first support shaft 21, or the connecting portion 28 and the first support shaft 21, the points 0 and H can be brought close enough to each other. In addition, the position of the horizontal portion 23b of the upper arm 23 (the position corresponding to point Q in FIGS. 12a and 12b) or the holding position of the workpiece 1 can be kept constant.

〔Example〕

Hereinafter, specific examples will be described using FIGS. 2 to 9.

(First Embodiment) FIG. 2 is a front view showing a first embodiment of the workpiece holding device 30 according to the present invention.

Stay 3 fixed to the upper shaft (not shown)
A swinging arm (seesaw plate) 32 formed in a U-shape at the center of the lower end of the support shaft (first support shaft) 33
It is attached via a shaft. At both ends of the opening of the swing arm 32, there are upper arms 3 formed in a U-shape with the horizontal part as the base, similar to the swing arm 32.
4 are rotatably connected via a support shaft (second support shaft) 35. A female thread 36 is threaded in the center of the upper arm 34 in a direction intersecting the rotational axis Y of the upper arm 34.
6 is screwed with the upper part of a workpiece support portion 38 having a male thread 37 threaded thereon that engages with the female thread 36. The upper part of the workpiece support part 38 is provided with nut members 39 and 40.
It is fixed to the upper arm 34 via
By loosening these nut members 39 and 40, the length of screwing into the upper arm 34 can be adjusted.

A work holder 42 for holding a work 41 is rotatably supported at the lower part of the work support part 38 via a bearing 43. Therefore, when processing the workpiece 41, the workpiece 41 rotates together with the workpiece holder 42 about the central axis of the bearing 43, so that the axis of rotation of the workpiece 41 is on the central axis.

The work 41 is placed in a work holder 42 with a cushioning material 4.
The workpiece 41 is held through the workpiece 4, and is configured to facilitate replacement of the workpiece 41.

According to the above configuration, the position of the workpiece 41 can be adjusted in minute units by the cooperative action of the female screw 36, the male screw 37, and the nut members 39, 40. Therefore, there is no need to replace the upper arm 34 each time when processing workpieces 41 having different radii of curvature, and it is possible to improve workability and efficiency and reduce costs.

Further, when the upper part of the workpiece support part 38 is adjusted to move by screwing, the horizontal part 34a of the upper arm 34 remains in a constant position, which has the advantage of facilitating automation.

To summarize the effects of this embodiment as described above, by using the minimum number of workpiece holding devices 30, it is possible to handle workpieces 41 with a wider range of curvature radii, without creating any inconvenient machining conditions, and to cope with automation, etc. This is something that can make it easier.

(Second Embodiment) FIGS. 3a and 3b show a second embodiment of the present invention. The feature of this embodiment is that the upper part of the workpiece support part 38, which does not have a threaded part, can be moved and adjusted in the direction of the axis Z of the workpiece support part 38 via a fixed ring 50 fixed between the pair of legs 34a of the upper arm 34. The point is that it is constructed so that it can be fixed and held freely. That is, the horizontal part of the upper arm 34 is formed into a circular fixed ring 50 as shown in FIG. 3b, and the axial hole 5 of the fixed ring 50 is
After the upper part of the work supporting part 38 is inserted into the upper part of the work supporting part 1, the upper part of the work supporting part 38 can be fixedly held by a bolt 52 and a nut 53. Reference numeral 54 indicates a slot as a tightening allowance. Other members that are the same as those in the first embodiment are given the same reference numerals and their explanations will be omitted.

Even in the above configuration, the same functions and effects as in the first embodiment can be achieved.

(Third Embodiment) FIG. 4 shows a third embodiment of the present invention. The feature of this embodiment is that, in FIG. 3 shown in the second embodiment, a step 60 is formed in the middle part of the workpiece support part 38, and the upper part of the step 60 is formed to have a slightly smaller diameter. In addition, the workpiece support portion 38 is configured to be fixedly held via the fixed ring 50 at a position determined by a spacer 61 ring-mounted in this small diameter portion. That is, the spacer 61 is used for positioning the workpiece 41, and therefore, it is sufficient to prepare a spacer 61 of a length corresponding to the workpiece 41 for each workpiece 41. In particular, this embodiment has the advantage that the time required for setting the workpiece position can be shortened.

(Fourth example) A fourth embodiment of the present invention is shown in FIGS. 5-7.

The feature of this embodiment is that in the configuration shown in FIGS. 3a and 3b, the fixed ring 50 constituting the horizontal portion is
It is constructed by replacing the fixing plate 70 as shown in the figure, and this fixing plate 70 is attached to the left and right upper arms 34.
The workpiece support section 38 is configured to be adjustable in the vertical direction by supporting the legs 34a, 34a so as to be vertically movable. That is, at both ends of the fixing plate 70, there are two vertically long rows of guide holes 7 provided in each leg portion 34a, 34a of the upper arm 34.
1 and 71 in a protruding manner, and the fixing plate 70
It is possible to adjust the movement in the vertical direction by sliding it up and down along the guide hole 71, and at the upper end, the fixing plate 70 and each leg 34a,
34a forms a U-shape, and the intermediate portion forms an H-shape. Fixed plate 70
A tapped hole 73 is screwed into the center of both end faces of the upper arm 34, and the fixing plate 70 can be fixed to the upper arm 34 by screwing a bolt 74 from the outside of the legs 34a, 34a of each upper arm. It's getting old. Note that guide holes 75 for escape of bolts 74 are provided in parallel to guide holes 71 in the leg portions 34a, 34a of each upper arm so that the fixing plate 70 can be fixed at any sliding position. 76 is a spacer. A screw 77 is cut into the upper end of the workpiece support portion 38, and the workpiece support portion 38 is screwed and fixed to a screw plate 78 provided on the fixing plate 70 via the screw 77.

According to the above configuration, by moving the fixing plate 70 up and down, the workpiece support part 38 can be easily adjusted in the direction of its axis Z, and the fluctuation of the moment of inertia caused by the dead weight of the fixing plate 70 around the rotation axis Z can be suppressed. It can be made smaller than that of the second and third embodiments, and can be made more suitable for machining the workpiece 41.

(Fifth Embodiment) FIG. 8 shows a fifth embodiment of the present invention. The feature of this embodiment is that both support leg portions of the upper arm 34 extend in the longitudinal direction, and the support shaft 35 is maintained at an appropriate interval (appropriate pitch) along the longitudinal direction at the extended portion.
The point is that a plurality of holes 80, 80, . . . for insertion are formed at opposing positions. Hole 80, 80
The center line of ... is set to be orthogonal to the rotation axis Z. Also, the distance between holes 80 and 80 (pitch)
are set so that they can be set at optimal positions corresponding to the shape of the workpiece 41.

According to the above configuration, the position corresponding to the work 41 can be accurately and reliably set, and the position corresponding to the work 41 can be accurately and reliably set.
1, the moment of inertia generated by the weight of the upper part of the upper arm 34 can be reduced by the extending legs extending downward from the upper arm 34, which has the advantage of being able to obtain stable machining conditions. .

(Sixth Embodiment) FIGS. 9a and 9b show a sixth embodiment of the present invention. The feature of this embodiment is that, similarly to the fifth embodiment, extending portions 34a are provided on both support leg portions of the upper arm 34, and at least two or more insertion holes 90 are provided in each extending portion 34a at appropriate intervals. In addition, holes 91 for fitting the support shaft 33 are formed at appropriate intervals in the extending portion 31a extending at the lower part of the stay 31. In this embodiment, the workpiece 41 is held in a pasting plate (holder) 93 supported by the upper arm 34 via a bearing 92.

According to the above configuration, when processing different workpieces 41, the lower part Q of the upper arm 34 is always held in a fixed position by combining the hole 90 on the upper arm 34 side and the hole 91 on the stay 31 side according to the shape of the workpiece. It becomes possible to do so. That is, the intersection point 0 of the point H determined on the workpiece 41 (see FIG. 11) and the axis of the workpiece support device 30 (see FIG. 1)
By adjusting the position of the support shaft 35 by the adjusted length, the lower Q of the upper arm 34 can be adjusted.
can be held in place. Therefore, when the workpiece 41 is loaded or unloaded (supplied, taken out) by an autoloading device (not shown) for automated processing, the Q point is always at the fixed position regardless of the shape of the workpiece. Processing by autoloading becomes easier.

In addition, in this embodiment, since the pasting plate 93 is used, it is easy to adapt to the shape of the workpiece, recess processing (multiple workpieces pasting) is possible, and the fifth
In order to further reduce the moment of inertia described in the embodiment, it becomes easier to reduce the distance from the workpiece processing surface to the Q section. Therefore, this embodiment has the advantage of being able to accommodate any workpiece shape, reducing the moment of inertia that is inconvenient to machining, and facilitating automated machining.

In addition, in this embodiment, the upper arm 3
Although the hole 90 provided in the fourth embodiment and the hole 91 provided in the stay 31 have been explained, the hole 91 provided in the stay 31 is explained using the fourth embodiment and the sticking plate 93 of this embodiment.
Of course, the same effect can be obtained by combining the two.

〔Effect of the invention〕

As described above, according to the present invention, a workpiece having a planar shape, a workpiece close to a planar shape,
Workpieces with various curvature radii, such as convex and concave workpieces, can be held in a manner compatible with automated processing, and workability, work efficiency, and cost reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the principle structure of the device according to the present invention, FIG. 2 is a partially cutaway front view showing the first embodiment of the present invention, and FIGS. FIG. 4 is a partially cutaway explanatory diagram showing the second embodiment, and FIG. 4 is a partially cutaway front view showing the third embodiment of the present invention, and FIGS.
FIG. 8 is an explanatory diagram showing a fourth embodiment of the present invention, and FIG. 8 is a partially cutaway front view showing a fifth embodiment of the present invention.
FIGS. 9a and 9b are partially sectional front views showing a sixth embodiment of the present invention, and FIGS. 10 to 12 a and b are explanatory views of the prior art. 20... Stay member, 21, 24... Support shaft, 22...
Swing arm, 23... upper arm, 25... workpiece, 26... workpiece support section.

Claims (1)

[Scope of Claims] 1. A stay member that is fixed to a processing machine and supports machining pressure applied to a workpiece during machining the workpiece, and a stay member that rotates about the axis of the first support shaft via a first support shaft. The second support shaft is movably supported, has a substantially U-shape with the first support shaft as the axis of symmetry, and has a second support shaft having an axis that intersects the axis of the first support shaft at its tip. a swinging arm; a pair of legs supported at both ends of the swinging arm so as to be rotatable about the axis of the second support shaft via the second support shaft; a substantially U-shaped or substantially H-shaped upper arm formed from a connecting horizontal portion; one end of the upper arm is supported by the horizontal portion, the other end holds the work; a workpiece support part that is rotatable; and configured such that the axes of the first and second support shafts intersect with the rotational axis of the workpiece, and for moving the workpiece support part in the direction of the axis thereof. A workpiece holding device characterized by being provided with an adjustment mechanism. 2. The workpiece holding device according to claim 1, wherein the workpiece held by the workpiece supporter or the position of the workpiece supporter is substantially constant by the adjustment mechanism. 3 Adjusting the movement of the workpiece support in its axial direction involves adjusting at least one of the position of the first support shaft, the position of the second support shaft, or the support position of the workpiece support to the axis of the workpiece support. The workpiece holding device according to claim 1, characterized in that the workpiece holding device performs the workpiece holding device by moving in the direction. 4. A patent claim characterized in that the movement and adjustment of the workpiece support part in the axial direction is performed by moving the connection position between the leg part and the horizontal part of the upper arm in the axial direction of the workpiece support part. The work holding device according to item 1.