JPH0647607A - Centering device for rotating material holder - Google Patents

Abstract

PURPOSE:To enable a centering process to be carried with high accuracy, by constructing a device so that its structural members are relatively slid in feeding direction by a distance equivalent to its tangent of an angle of feeding direction of an operating body. CONSTITUTION:A base plate 2, the first plate member 3 and the second plate member which serves as a rotating material holder side are mounted in mutually superposed state. Between the base plate 2 and the first plate member 3, and between the first plate member 3 and the second plate member, operating bodies 5 are interposed respectively so that the interposed base plate 2 and base member 3 are respectively slid relatively in a direction perpendicular to a screw feeding direction by a distance equivalent to tangent of an angle of a feeding direction when the operating bodies are screw-fed. When the operating bodies 5 are screw-fed, the interposed base plate 2 and the base member 3 are respectively slide relatively by a product of a fed amount and tangent of its feed direction angle, but when the angle is small, a sliding amount becomes small accordingly, so that highly accurate centering may be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to so-called centering for adjusting the center of a held rotating object to a predetermined position in a rotating object holder such as a chuck or collet. In particular, the present invention relates to a centering device for a rotating object holder that has a high centering accuracy and that is low in cost by suppressing the number of parts and processing accuracy.

[0002]

2. Description of the Related Art In a conventional centering device for a rotating object holder,
Two plates that can slide in mutually orthogonal directions are stacked on the substrate, and a feed screw mechanism for relative movement is interposed between the substrate and the first plate, and between the first plate and the second plate. It had been.

[0003]

In the conventional centering device for a rotary object holder, the centering accuracy is determined by the pitch of the feed screw mechanism, and a reliable value is at most several .mu.m-1.
It is about 0 μm, and there is a problem in that it cannot be centered with an accuracy of the order of 1 μm or sub μm. In order to solve this problem, a method of using a differential micrometer instead of the lead screw mechanism will be considered. However, when the differential micrometer is incorporated, the size of the entire apparatus becomes large and parts such as the differential micrometer require high processing accuracy, resulting in a problem of high cost. The present invention has been made in view of the above circumstances, and provides a centering device for a rotating object holder that is capable of centering with high accuracy and that is compact in size and does not increase cost. is there.

[0004]

According to the present invention, when a screw is fed in a second direction between a substrate and a first plate member, the substrate is separated by a tangent of a first predetermined angle. When a first actuating body that relatively moves the first plate member in the first direction is interposed, and when the first plate member and the second plate member are screw-fed in the first direction. Tangent of the second predetermined angle (ta
ngent) is a centering device for a rotating object holder, in which a second actuating member that relatively moves the first plate member and the second plate member in the second direction is interposed.

The detailed construction is as follows: a substrate, a first plate member slidably held with respect to the substrate in a first direction orthogonal to the axis of a rotating object holder to be centered, and the first plate member. The first plate member is slidably held in a direction orthogonal to the axis of the rotating object holder to be centered and in a second direction orthogonal to the first direction, and further to the rotating object holder. Is provided directly or indirectly, a second plate member is provided, and on one side of the substrate and the first plate member, a first recess extending in the second direction is provided on the other side. First groove portions that extend at a first predetermined angle with the second direction are formed in the facing portions of the concave portions of the first concave portion and are fitted in the first concave portion between the substrate and the first plate member. Mating base that is slidable in the second direction and the first groove that is slidable in the direction of the first predetermined angle. The convex portion is formed with a first operating member that is screw feeding in a second direction is interposed, in addition,
A second recess extending in the first direction is provided on either one of the first plate member and the second plate member, and a second direction is provided on the opposite side of the second recess on the other side. Second groove portions extending at a predetermined angle are formed, and the second groove portion is fitted between the first plate member and the second plate member and is slidable in the first direction. A base part and a convex part that fits in the second groove part and is slidable in the direction of the second predetermined angle. Is a centering device for the rotating object holder. The smaller the first and second predetermined angles are, the smaller the tangent value is, and as a result, high-precision positioning can be performed. However, if the first and second predetermined angles are too small, a problem that machining becomes complicated occurs. 2 ° ~
5 ° is included.

[0006]

[Operation] When the first actuator is screw-fed in the second direction,
The substrate and the first plate member relatively move in the first direction by the product of the feed amount and the tangent of the first predetermined angle. When the second actuating member is screw-fed in the first direction, the second plate member and the second plate member are relatively moved in the second direction by the product of the feed amount and the tangent of the second predetermined angle. Moving.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the embodiments shown in FIGS. However, the present invention is not limited to the embodiments. Centering device for rotating object holder 1
1 to 6, a substrate 2, plate members 3 and 4, and actuating bodies 5 and 6 are provided. Further, the centering device 1 for the rotating object holder is provided with means for adjusting the inclination of the rotating object holder. That is, the centering device 1 for the rotating object holder is provided with the holder 7, the base 8 and the six spacers 9. The cross roller guides 10 and 11 are interposed between the substrate 2 and the plate member 3, and the plate member 3 slides with respect to the substrate 2 in the arrow X direction which is a direction orthogonal to the axis of the rotating object holder to be centered. It is possible.
The substrate 2 is formed with a recess 12 that extends in the direction of arrow Y, which is orthogonal to the axis of the centered rotating object holder and is also orthogonal to the direction of arrow X, and a female screw hole 13 that communicates with this recess 12. The arrow Y direction and 3
Grooves 14 extending at an angle of ° are formed. Then, the recess 13 and the groove 1 are provided between the substrate 2 and the plate member 3.
An actuating member 5 that engages with the screw 4 and is screw-fed in the direction of the arrow Y is interposed. That is, the actuating body 5 is provided with a base portion 15 which is fitted in the concave portion 12 and slidable in the arrow Y direction, and a convex portion 16 which is fitted in the groove portion 14 and slidable in the direction of the arrow Y direction by 3 °. A through hole 18 into which a screw feed member 17 screwed into the female screw through hole 13 is inserted and locked is formed.

Therefore, when the screw feed member 17 is operated to screw feed the actuation body 5 in the direction of the arrow Y, the substrate 2 and the plate member are multiplied by the product of the feed amount and the tangent of the angle of 3 °. 3 relatively slides in the direction of arrow X. If the pitch of the screw feed member 17 is 0.5 mm, and if the minimum angle at which most workers can reliably rotate manually is 5 °,
The plate member 3 can be slid with respect to the substrate 2 in the direction of the arrow X at a distance whose minimum unit is as follows. 0.5 mm × 5 ° ÷ 360 ° × tan3 ° ≈0.36 μm A clamp means is interposed between the substrate 2 and the plate member 3,
When the position of the plate member 3 in the arrow X direction is obtained by operating the screw feed member 17, that is, when the centering in the arrow X direction is obtained, the position is held. The clamp means is formed on the substrate 2 and the block 19 fixed to the plate member 3 with screws, and the block 19 is formed.
And a female screw hole 21 formed in the substrate 2.
It is mainly composed of a male screw rod 22 which is screwed into the block 19 and contacts the block 19 to regulate the position of the block 19.

Cross roller guides 23 and 24 are interposed between the plate member 3 and the plate member 4, and the plate member 4 is the plate member 3
On the other hand, it is slidable in the arrow Y direction which is orthogonal to the axis of the rotating object holder to be centered and is also orthogonal to the arrow X direction. The plate member 3 has a recess 25 extending in the direction of the arrow X and a female screw through hole 2 communicating with the recess 25.
6 is formed, and the plate member 4 is provided with a groove portion 27 that extends at an angle of 3 ° with the direction of the arrow X in the portion facing the recess 25. Then, the recess 2 is formed between the plate member 3 and the plate member 4.
5 and the groove 27, and the actuating body 6 which is screw-fed in the arrow X direction is interposed. That is, the actuating body 6 has the concave portion 2
5, a base portion 28 that is slidable in the arrow X direction and a projection portion 29 that is slidable in the groove portion 27 in the direction of the arrow X and are slidable in the direction of 3 ° are provided. A communicating hole 31 through which the screw feeding member 30 is inserted is formed.

Therefore, when the screw feed member 30 is operated to screw feed the operating body 6 in the direction of the arrow X, the plate member 3 and the plate member 4 are multiplied by the product of the feed amount and the tangent of the angle of 3 °. Moves relatively in the direction of arrow Y. Screw feed member 30
If the minimum pitch at which most workers can reliably rotate manually is 5 ° when the pitch of 1 is 0.5 mm, the plate member 3
On the other hand, the plate member 4 can be slid in the direction of the arrow Y at a distance whose minimum unit is as follows. 0.5 mm × 5 ° ÷ 360 ° tan3 ° ≈0.36 μm A clamp means is interposed between the plate member 3 and the plate member 4, and the screw feeding member 30 is operated to move the plate member 4 from the plate member 3. The position in the arrow Y direction is obtained, that is, the arrow Y
When the directional alignment is obtained, the position is maintained. The clamp means is screwed and fixed to the plate member 4, a block 32 formed in the plate member 3, a recess 33 for accommodating the block 32, and a female screw hole 34 formed in the plate member 3 and screwed into the block 34. It is mainly configured by a male screw rod (not shown) that abuts and regulates the position of the block 32.

In the means for adjusting and shaving the tilt of the rotating object holder, the holder 7 holds the rotating object holder such as a chuck or a collet. The base 8 is formed with a flange portion 35 extending in the axial direction on the outer periphery of the donut plate, and is fixed to the plate member 4 together with the holder 7 with screws. The surface of the base 8 on the plate member 4 side is a flat surface. The surface of the base 8 opposite to the plate member 4 side is formed as a concave surface 36 with the axis as the center.

Six spacers 9 are interposed between the holder 7 and the base 8 facing each other. Spacer 9
When placed at a fixed position on the same circumference, the surface of the spacer 9 facing the base 8 is formed as a convex surface 37 corresponding to the concave surface 36 of the base 8. The holder 7 and the surface of the spacer 9 facing the holder 7 are both formed flat. When the spacers 9 are arranged at fixed positions on the same circumference, they can be screwed in the radial direction independently of each other. That is, each spacer 9 is formed with the female screw portion 38 that advances in the radial direction with respect to the axis, and the feed screw 40 that is inserted through the hole 39 formed in the flange portion 35 of the base 8 is screwed into the female screw portion 38. . Therefore,
When the feed screw 40 is rotated, the spacer 9 moves to the base 8
The spacer 9 is screw-fed in the radial direction and moves along the concave portion of the base 8, and the distance between the base 8 and the holder 7 changes. Therefore, the distance between the base 8 and the holder 7 can be adjusted at six places where the spacer 9 is interposed, and as a result, the inclination of the holder 7 with respect to the base 8 can be adjusted.

As described above, the centering device 1 for the rotating object holder has a screw feed amount and a tangent of a predetermined angle between the substrate 2 and the plate member 3 and between the plate member 3 and the plate member 4, respectively. By interposing the actuating members 5 and 6 which can be slid by the product of, the rotary object holder can be centered with high accuracy of sub-μm. Moreover, it does not require a large-scale means such as a differential micrometer, and only needs to add members such as the actuating bodies 5 and 6, the screw feed members 17 and 30, and the like, and the entire apparatus becomes large-scale. It is finished compactly. Further, it can be manufactured at low cost.

In the centering device 1 for the rotary object holder, the groove portion 14 and the portion 16 have an angle of 3 ° with respect to the feeding direction of the operating body 5, that is, the arrow Y direction. It may be appropriately selected according to the pitch of the screw of the member 17 and the minimum amount of sliding of the plate member 3 with respect to the substrate 2. The same applies to the feed direction of the actuation body 6, that is, the angles of the groove portion 27 and the convex portion 29 with respect to the arrow X direction. In the centering device 1 for the rotating object holder, the actuator 5 is provided between the substrate 2 and the plate member 3.
The relationship between the concave portion 12 and the groove portion 14 which respectively fit and slide the base portion 15 and the convex portion 16 may be reversed.
The same applies to the actuation body 6 interposed between the plate member 3 and the plate member 4. In the centering device 1 for a rotating object holder, the actuating members 5 and 6 have prisms each having a quadrangular cross section, with the respective convex portions 16 and 29. However, the convex portions 5 and 6 may be, for example, columnar bodies having a semicircular cross section, and therefore the groove portions 14 and 27 have the same shape as the convex portions 5 and 6.
It may be appropriately selected according to the sectional shape of.

[0015]

According to the present invention, when an actuating body is screw-fed in a direction orthogonal to the feed direction, only the tangent of the angle formed by the actuating body with respect to the feed direction causes the member to move relative to the feed direction. Since it is configured to slide in, it is possible to perform much finer feeding than simply performing screw feeding, it is possible to perform centering with higher accuracy, and moreover, without requiring large-scale members or means, It is a compact centering device for a rotating object holder, which can keep the manufacturing cost low and does not make the entire device large.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of essential parts of the embodiment shown in FIG.

FIG. 3 is an exploded perspective view of essential parts of the embodiment shown in FIG.

FIG. 4 is an exploded perspective view of essential parts of the embodiment shown in FIG.

5 is a sectional view taken along line I-I of the embodiment shown in FIG.

6 is a sectional view taken along the line II-II of the embodiment shown in FIG.

[Illustration of sign]

 1 ... Centering device for rotating object holder 2 ... Substrate 3, 4 ... Plate member 5, 6 ... Actuator 12, 25 ... Recessed portion 14, 27 ... Groove portion 15, 58 ... Substrate 16, 29 ... Convex portion 17, 30 ... Screw feed member

Claims (1)

[Claims] 1. A substrate, a first plate member slidably held with respect to the substrate in a first direction orthogonal to an axis of a rotating object holder to be centered, and a first plate thereof. The member is slidably held by a member in a direction orthogonal to the axis of the rotating object holder to be centered and in a second direction orthogonal to the first direction, and the rotating object holder is directly or indirectly attached. A second plate member for holding the first plate member is provided on one side of the substrate and the first plate member, and a first recess extending in the second direction is provided on the other side of the first plate member. A first groove portion extending in the second direction and having a first predetermined angle with each other is formed, and is fitted into the first recess between the substrate and the first plate member. Formed with a base that is slidable in any direction and a protrusion that fits in the first groove and is slidable in the direction of the first predetermined angle And a first actuating body which is screw-fed in the second direction is interposed, and further, on one side of the first plate member and the second plate member, a second extending in the first direction is provided. A second groove portion is formed on the other side of the concave portion, facing the second concave portion and extending at a second predetermined angle with respect to the first direction. Between the plate members, a base portion that fits in the second concave portion and is slidable in the first direction, and a convex portion that fits in the second groove portion and is slidable in the second predetermined angle direction are provided. Centering device for the rotating object holder, which is formed by interposing a second actuating member that is screw-fed in the first direction.