JPH0632244Y2 - Shake correction axis - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a holder for holding a chuck or center for holding a workpiece provided on a machine tool such as a lathe or a grinding machine, or a tool for holding a drill or the like. The present invention relates to a shake correction axis that eliminates the shake of the heart.

(Prior Art) Heretofore, a collet chuck having a centering function as the main one has been applied by the present applicant as Japanese Patent Application No. 62-027862. This is a structure as shown in FIG. In the figure, 31 is a collet chuck, and a driven flange 32 that holds the collet chuck 31 is attached to the driving flange 33 so as to be movable in the radial direction for centering.

That is, an insertion hole 32a that engages with the sleeve surface 31a of the collet chuck 31 is provided, and a main body portion 32b that has a key 38 that engages with the key groove 31b of the collet chuck 31 is provided, and a flange integrally formed with this main body portion 32b. The driven flange 3 in which an adjusting screw 36 is provided in the portion 32c, and an annular space is provided inside the flange portion 32c in which the adjusting screw 36 is provided
2 and a cylindrical portion 33a projecting with a gap C provided in the annular space of the driven flange 32, and a rear portion thereof is provided with a flange portion 33b in close contact with the end surface of the driven flange 32.
Inside the flange portion 33, there is provided a driving flange 33 provided with a screw portion 34 which is screwed to a main shaft (not shown), and the cylindrical portion 33a is arranged in the annular space of the driven flange 32 and a fixing screw is provided. It was configured to be fastened by 37. Then, the adjusting screw 36 provided on the driven flange 32
It is intended to adjust the deflection of the axial center in the radial direction.

(Problems to be Solved by the Invention) In the above-mentioned configuration, the center of the collet chuck only moves parallel to the center of the spindle, and adjustment is not possible when the center of the collet chuck is tilted to the center of the spindle. is there.
Generally, when a workpiece is gripped and processed by the collet chuck, not only the center of the workpiece gripped by the collet chuck is aligned with the center of the spindle, but also the center of the workpiece is aligned. There must be.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a shake correction axis for aligning the center of a workpiece with the center of a main axis.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention is provided on a main shaft for transmitting a rotational force, and has at least three outer peripheral surfaces for adjusting the axial center in the radial direction. The drive flange is provided with a shaft runout adjusting screw and is attached to the drive flange via a fixing screw so as to be able to come into contact with and separate from the drive flange. The adjusting screw has an overlapping portion which is a contact surface, and at least three inclination adjusting screws for adjusting the inclination of the axial center in the axial direction are provided in the overlapping portion, and sliding contact with the end surface of the drive flange is performed. The driven flange, which has a concave spherical bearing surface on the flange part, is attached to the driven flange so as to be able to come into contact with and separate from the driven flange via a fixing screw, and has a gap with respect to the inner surface of the driven flange. While polymerizing in the axial direction And a shake correction having a chuck sleeve having a flange portion provided with a convex spherical bearing portion that slides on the bearing surface of the driven flange It is an axis.

(Operation) In the shake correction shaft configured as described above, the driven flange is provided between the drive flange provided on the main shaft and the driven flange that is attached to and separated from the drive flange with a gap. Adjust in the radial direction of the shaft center. A shaft deflection adjusting screw is provided, and a spherically formed bearing portion is provided between the driven sleeve and a chuck sleeve that is attached to and separated from the driven flange with a gap, and the driven flange is driven. Since the inclination of the chuck sleeve in the axial direction is adjusted by the inclination adjusting screw provided on the flange, the deflection and inclination of the center of the workpiece with respect to the main shaft can be eliminated.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. Particularly, FIGS. 1 to 6 use a spherical bearing, and FIGS. 7 to 10 show a bearing surface side which is a bearing inclined surface.

FIG. 1 is a sectional view showing the most basic structure of the shake correction shaft of the present invention. In the figure, 1 is a shake correction axis,
A drive flange 2 attached to a main shaft that transmits a rotational force of a lathe, a driven flange 3 attached to the opposite side of the drive flange 2 from the main shaft attachment side, and a drive flange 3 attached to the driven flange 3 and at the center thereof. It is composed of three parts of a chuck sleeve 4 for attaching a center, a collet chuck and the like.

The structures of the above three parts will be described below. The drive flange 2 is provided with a mounting portion 2a screwed to a main shaft that transmits a rotational force, and a small diameter portion 2b is formed on the outer periphery of the mounting portion 2a. A large-diameter portion 2c is formed on the opposite side in the axial direction where the small-diameter portion 2b is provided, and the large-diameter portion 2c has a first stepped portion 2d with a predetermined wall thickness. This first
A second step portion 2e is provided inside the step portion 2d. The first step portion 2d and the second step portion 2e are formed in a concentric cylindrical shape, and the second step portion 2e is provided with a through hole 2f inserted from the outer peripheral surface. The through hole 2f is an insertion hole for a tightening bar when the drive flange 2 is screwed onto the main shaft. Further, screw holes 5 are provided at least at three locations on the large diameter portion 2c of the drive flange 2 toward the center of the large diameter portion 2c at equal intervals in three directions. A shaft runout adjusting screw 6 slightly attached to the first step is attached. This shaft runout adjustment screw 6
At least three through holes 2g are formed at an intermediate position of the screw hole 5 on the large diameter portion 2c provided with.

The driven flange 3 has an overlapping portion 3a that is axially superposed while having a gap with respect to the diameter of the large step portion 2d provided on the large diameter portion 2c of the driving flange 2, and the large diameter portion 2c.
Formed with a flange portion 3b that is closely attached to the end surface of
A hole 3c for inserting a chuck sleeve 4 described later is provided at the center thereof. A bearing surface 7 formed in a concave spherical shape is provided on the abutting surface of the hole 3c and the flange 3b, and at least three places of the bearing surface 7 are provided with screw holes 8 arranged at equal intervals. It is provided. Further, on the flange portion 3b provided with the bearing surface 7, socket holes 9 for accommodating socket screws are provided at equal intervals in at least three locations in the axial direction. The driven flange 3 is fixed to the driving flange 2 by a fixing screw 10 screwed into a screw hole provided in the end surface of the driving flange 2 in the socket hole 9. By attaching the driven flange 3 to the drive flange 2, the protruding portion of the shaft runout adjusting screw 6 provided on the large-diameter portion 2c of the drive flange 2 comes into contact with the overlapping portion 3a of the driven flange 3 to adjust the shaft runout. The driven flange 3 is moved and adjusted in the radial direction by tightening and loosening the screw 6.

The chuck sleeve 4 is composed of a cylindrical overlapping portion 4a and a flange portion 4b projecting on the outer periphery of the overlapping portion 4a, and a tapered hole 4c for locking a center or a collet is provided at the center. And the flange portion 4
A convex spherical bearing portion 11 that engages with the concave spherical bearing surface 7 provided on the driven flange 3 is formed on one side surface of b. Flange portion 4b provided with this bearing portion 11
At least three socket holes 12 provided at equal intervals are provided on the flat surface of the, and the fixing screw 13 for attaching the chuck sleeve 4 to the driven flange 3 in a manner attachable to and detachable from the socket hole 12 is attached to the socket holes 12. To be Then, when the chuck sleeve 4 is fastened and fixed to the driven flange 3, the tilt adjusting screw 14 for adjusting the axial tilt provided on the driven flange 3 is applied to the outer peripheral surface of the overlapping portion 4 of the chuck sleeve 4. It is configured to touch. By tightening and loosening the tilt adjusting screw 14, the chuck sleeve 4 is moved to the bearing portion 11
The inclination in the axial direction can be adjusted along the spherical surface of the bearing surface 7 and the bearing surface 7.

FIG. 2 is an example in which the shake correction shaft of the present invention is used for a drive flange integrated with a main shaft. A flange portion 15a having a large diameter portion is provided at one end of the main shaft 15. This flange part 1
A driven flange 3 is attached to the inside of 5a.
Inside the driven flange 3, a chuck sleeve 4A is attached via the bearing surface 7 of the driven flange 3,
A straight hole 18 for mounting a center 17 having a straight shank 16 is provided inside the chuck sleeve 4A. Chuck sleeve 4A flange 4A
The boss portion 4ab projecting outwardly from a is provided with a screw hole 19 for tightening after mounting the center 17. In such a configuration, the shaft runout adjusting screw 6 for adjusting the driven flange 3 in the radial direction is provided on the flange portion 15a of the main shaft 15.
It is possible to adjust the deflection of the center in the radial direction. Further, the tilt of the axial center can be adjusted by the action of the bearing surface 7 provided on the driven flange 3 and the tilt adjusting screw 14.

FIG. 3 shows the same construction as the one in which the drive flange is integrally formed on the main shaft shown in FIG. 2, but with a different chuck sleeve structure. This chuck sleeve 4B is provided with a tapered hole 21 inside for mounting the center 17 having the tapered shank 20, and the bearing portion 1 provided on the flange portion 4Ba of the chuck sleeve 4B.
Reference numeral 1 is a convex spherical surface that engages with the bearing surface 7 of the driven flange 3. Then, the chuck sleeve 4B is fixed to the driven flange 3 by the fixing screw 13, and the center shake in the radial direction is adjusted by the shaft runout adjusting screw 6 provided on the drive flange 15a of the main shaft 15. Further, the inclination of the axial center is adjusted by the action of the inclination adjusting screw 14 provided on the driven flange 3 and the bearing surface 7.

FIG. 4 shows the shake correction shaft of the present invention applied to a collet chuck. In the figure, a spindle 1 for transmitting a rotational force
5 drive flange 15a is provided, this drive flange 15a
The driven flange 3 is attached to the drive flange 3 with a fixing screw 10. The driven flange 3 has a bearing surface 7, and the bearing portion 11 provided on the flange portion 4Ca of the chuck sleeve 4C is engaged with the bearing surface 7, and the flange portion 4
It is attached by a fixing screw 13 provided on Ca.
A collet chuck 21 is held at the center of the chuck sleeve 4C, and an intermediate drawbar 22 and a drawbar 23 that reciprocate when the collet chuck 21 holds and releases a workpiece are connected to the rear portion thereof. In such a configuration, the drive flange 15a is provided with the shaft runout adjusting screw 6, and the shaft runout adjusting screw 6 adjusts the center runout of the workpiece held by the collet chuck 21 in the radial direction. Further, the tilt of the axial center is adjusted by the action of the tilt adjusting screw 14 provided on the driven flange 3 and the bearing surface 7.

FIG. 5 shows a shake correction shaft of the present invention which is detachably formed on the main shaft. In the figure, 2A is a drive flange, and a screw portion 24 screwed to the main shaft is provided on the rear surface (right side of the figure) of the drive flange 2A.
Is provided. Drive flange 2 provided with this screw portion 24
A driven flange 3 is fixed to the driving flange 2A by a fixing screw 10 on the front surface (left side in the drawing) of A, and a chuck sleeve 4C is attached to a bearing surface 7 of the driven flange 3 by a fixing screw 13. A collet chuck 21 is mounted at the center of the chuck sleeve 4C, and an intermediate drawbar 22 and a drawbar 23 are connected to the rear portion of the collet chuck 21. When the drive flange 2A is screwed onto the main shaft, the intermediate drawbar 22 and the drawbar 2 are connected.
3 is housed in a hollow cylindrical portion inside the main shaft. With such a configuration, the adjustment screw 6 provided on the drive flange 2A adjusts the deflection of the center of the workpiece held by the collet chuck 21 in the radial direction. Further, the tilt of the axial center is adjusted by the action of the tilt adjusting screw 14 provided on the driven flange 3 and the bearing surface 7.

FIG. 6 shows a shake correction shaft of the present invention used in a chuck sleeve using a spring chuck. In this case, the chuck sleeve 4E has a bottomed cylindrical body 4Ea.
And the flange portion 4 provided so as to project on the outer periphery of the main body portion 4Ea.
The flange 4Eb is provided with a convex spherical flange which serves as the bearing 11. A coil spring 25 is provided in the chuck sleeve 4E.
The collet chuck 21a is provided via the, and the cap nut 26 is screwed to the screw portion 4Ed provided on the boss portion 4Ec of the chuck sleeve 4E on the front side of the collet chuck 21a.
The collet chuck 21a is prevented from protruding and the workpiece held by the collet chuck 21a is fastened. The chuck sleeve 4E accommodating such a collet chuck 21a is attached to the driven flange 3 by the fixing screw 13, and the driven flange 3 is attached to the driving flange 2 by the fixing screw 10. Then, the center shake in the radial direction is adjusted by the shaft runout adjusting screw 6 provided on the large diameter portion 2c of the drive flange 2, and the tilt adjusting screw 14 provided on the driven flange 3 and the bearing surface 7 act to cause the shaft to move. The tilt is adjusted to the center of the direction.

Each of the shake correction shafts shown in FIGS. 1 to 6 described above has a surface contact mechanism between the concave spherical bearing surface provided on the driven flange and the convex spherical bearing portion of the chuck sleeve. The tilt of the center in the axial direction due to the action with the tilt adjusting screw can be adjusted, and the shake of the center in the radial direction can be adjusted by the shaft shake adjusting screw provided on the drive flange.

7 to 10, the concave spherical bearing surface provided on the driven flange is linearly contacted with the convex spherical bearing portion of the chuck sleeve as a linear inclined surface.

FIG. 7 shows the same structure as that shown in FIG. 1, in which 1 is a shake correction shaft and 2 is a drive flange. The overlapping portion 3Aa of the driven flange 3A is inserted into the first step portion 2d provided in the large diameter portion 2c of the driving flange 2 with a gap, and the flange portion 3Ab of the driven flange 3A is the driving flange 2A. It is attached by a fixing screw 10 closely to the end face of the. The tip end of at least three shaft runout adjusting screws 6 provided in the large diameter portion 2c of the drive flange 2 is in contact with the outer periphery of the overlapping portion 3Aa. Further, at least three inclination adjusting screws 14 are provided in the overlapping portion 3Aa of the driven flange 3A toward the center direction, and the center angle is approximately 120 ° on the front end face of the flange portion 3Ab of the driven flange 3A. The bearing inclined surface 7A having the inclination of is provided. A bearing portion 11 formed in a convex spherical shape provided on the back side of the flange portion 4b of the chuck sleeve 4 is closely contacted with the bearing inclined surface 7A, and is attached to the driven flange 3A by a fixing screw 13. The tip of the inclination or adjustment screw 14 is in contact with the portion 4a. In the above-described configuration, the center runout in the radial direction is adjusted by the shaft runout adjusting screw 6, and the driven flange 3A
The tilt of the center in the axial direction is adjusted by the action of the tilt adjusting screw 14 and the bearing sloped surface 7A.

FIG. 8 shows an example of the same construction as that shown in FIG. 2, in which the deflection of the present invention is applied to a drive flange in which a correction shaft is integrated with a main shaft. Flange part 15 consisting of large diameter part of main shaft 15
a is provided, and the driven flange 3A is attached to the inside of the flange portion 15a. A chuck sleeve 4A is attached to the driven flange 3A via a bearing inclined surface 7A, and a straight hole 18 for mounting a center 17 having a straight shank 16 is provided inside the chuck sleeve 4A. In such a configuration, the axial deflection of the chuck sleeve 4A can be adjusted by the axial deflection adjusting screw 6 provided on the flange portion 15a of the main shaft 15. Further, the inclination of the center in the axial direction can be adjusted by the action of the inclined bearing surface 7A provided on the driven flange 3A and the inclination adjusting screw 14.

FIG. 9 shows the same structure as that of FIG. 8 in which a drive flange is integrally formed on the main shaft, but a chuck sleeve having a different structure is attached. This chuck sleeve 4B is provided with a tapered hole 21 inside for mounting the center 17 having the tapered shank 20, and the bearing portion 1 provided on the flange portion 4Ba of the chuck sleeve 4B.
1 has a convex spherical shape. Then, the chuck sleeve 4B is fixed to the driven flange 3A by the fixing screw 13, and the central shake in the radial direction is adjusted by the shaft runout adjusting screw 6 provided on the drive flange 15a of the main shaft 15.
Further, the tilt of the center in the axial direction is adjusted by the action of the tilt adjusting screw 14 provided on the driven flange 3A and the bearing inclined surface 7A.

Similar to FIG. 5, FIG. 10 shows a shake correction shaft of the present invention which is detachably formed on the main shaft. In the drawing, 2A is a drive flange, and the drive flange 2A has a main shaft on the rear surface (right side of the drawing). A screw portion 24 for screwing is provided. On the front surface (left side in the figure) of the driving flange 2A provided with the screw portion 24, the driven flange 3A is fixed by the fixing screw 10 to the driving flange 2A.
The chuck sleeve 4C is fixed to the driven slope 3A of the driven flange 3A by the fixing screw 13. A collet chuck 21 is attached to the center of the chuck sleeve 4C, and an intermediate drawbar 22 and a drawbar 23 are connected to the rear portion of the collet chuck 21. When the drive flange 2A is screwed onto the main shaft, the intermediate drawbar 22 and the drawbar 23 are connected. Is housed in a hollow cylindrical portion in the main shaft. In such a configuration, the shaft runout adjusting screw 6 provided on the drive flange 2A adjusts the runout of the workpiece held by the collet chuck 21 in the radial direction. Further, the inclination of the axial center is adjusted by the action of the inclination adjusting screw 14 provided on the driven flange 3A and the bearing inclined surface 7A.

In each of the embodiments described above, at least three shaft runout adjusting screws for adjusting the radial direction are provided on the drive flange, and the drive flange is mounted with a gap to adjust the axial tilt. A driven flange having at least three tilt adjusting screws and a bearing surface or a bearing sloping surface on the flange surface, and a bearing portion engaging the bearing surface or the bearing sloping surface of the driven flange with a chuck sleeve. This is the shake correction axis.

In order to adjust the shake correction shaft configured as described above, first, a workpiece, a collet chuck holding a test bar, a center shank, or the like is attached to the chuck sleeve. Next, the fixing screw fixing the chuck sleeve is slightly loosened so that the chuck sleeve can slide on the bearing surface or the bearing slope. In this state, turn the spindle and check the tilt in the axial direction with a dial gauge or the like. At this time, if the axis of the workpiece, etc. is tilted with respect to the axis, when the maximum point of the tilt can be identified, stop the rotation of the spindle and adjust the tilt adjustment screws provided at the three locations. To zero the inclination and tighten the chuck sleeve fixing screw to fix the chuck sleeve. Next, the subject is rotated by applying the dial gauge or the like to the shaft of the workpiece or the like. Confirm that this rotation causes the shaft center to be eccentric. When the eccentricity of the shaft center can be identified, the fixing screw fixing the driven flange is slightly loosened so that the driven flange can slide on the end surface of the driving flange. In this state, turn the spindle to check the radial runout, and when the maximum point of the runout can be identified, stop turning the spindle and adjust the runout adjusting screw provided on the drive flange to eliminate eccentricity. By tightening the fixing screw on the driven flange, radial runout is corrected. Of course, since the shaft runout and the shaft tilt influence each other, it is possible to correct with an accuracy of 1 micron or less by alternately performing the above adjustment.

(Effect of the Invention) As described in detail above, the shake correction shaft of the present invention is provided on the main shaft for transmitting the rotational force, and at least three shafts for radially adjusting the shaft center are provided on the outer peripheral surface thereof. A drive flange provided with a screw for adjusting the shaft runout is attached to the drive flange so as to be able to come in contact with and separate from the drive flange via a fixing screw, and is superposed in the axial direction with a gap on the inner side surface of the vibration flange. It has a overlapped portion which becomes the contact surface of the runout adjusting screw, and at least 3 for adjusting the inclination of the axial center in this overlapped portion.
A tilted spherical adjustment surface is provided on the flange part that slides in close contact with the end face of the drive flange, and a driven flange that has a concave spherical bearing surface can be attached to and separated from the driven flange via a fixing screw. Mounted on the bearing surface of the driven flange, the bearing flange of the driven flange has a overlapping portion that overlaps with the inner surface of the driven flange in the axial direction and overlaps in the axial direction. Since it is configured with a chuck sleeve having a flange portion provided with a moving convex spherical bearing portion, there is an effect that axial runout due to radial direction and axial runout due to axial tilt can be corrected very easily and in a short time. .

[Brief description of drawings]

1 to 10 show an embodiment of the present invention, and FIGS. 1 to 6 show respective examples of a shake correction shaft provided with a concave spherical bearing surface, and FIG. 1 is a basic example. 2 is a cross-sectional view of the shake correction shaft, in which a straight center shank is attached, 3 is a cross-sectional view of the shake correction shaft in which a tapered center shank is attached, and 4 is a collet chuck. FIG. 5 is a sectional view of a shake correction shaft attached with a collet chuck and is screwed to a main shaft, and FIG. 6 is a sectional view of the shake correction shaft with a spring collet attached. FIG. 10 is an example of a shake correction shaft provided with a bearing slope, FIG. 7 is a sectional view of a basic shake correction shaft, FIG. 8 is a sectional view of a shake correction shaft to which a straight center shank is attached, and FIG. Is a tapered center Sectional view of the shake correction shaft mounting the Yanku, FIG. 10 is a sectional view of the correction shaft runout is screwed to the main shaft is attached to the collet chuck, FIG. 11 is an explanatory cross-sectional view of a conventional example. 1 ... shake correction axis, 2, 2A ... drive flange, 3, 3
A: driven flange, 3a, 3Aa: overlapping part, 4, 4
A, 4B, 4C, 4D ... Chuck sleeve, 4a ...
Overlapping part, 4b ... Flange part, 6 ... Shaft deflection adjusting screw,
7 ... Bearing surface, 7A ... Bearing slope, 10, 13 ... Fixing screw, 11 ... Bearing part, 14 ... Inclination adjusting screw, 15 ...
... spindle.

Claims (2)

[Scope of utility model registration request] 1. A drive flange provided on a main shaft for transmitting a rotational force, and provided on the outer peripheral surface thereof with at least three shaft deflection adjusting screws for adjusting a shaft center in a radial direction, and a drive flange fixed to the drive flange. It is attached so as to be able to come into contact with and separate from it via a screw, and has an overlap portion that overlaps in the axial direction while having a gap with respect to the inner surface of the drive flange and serves as a contact surface of the shaft runout adjusting screw. The driven part is provided with at least three tilt adjusting screws for adjusting the tilt of the axial center in the axial direction, and a concave spherical bearing surface is provided on the flange part that is in sliding contact with the end face of the driving flange. The flange and the driven flange are attached to each other via a fixing screw so as to be separable from each other, and overlap with each other in the axial direction while having a gap with respect to the inner surface of the driven flange to contact the contact surface of the tilt adjusting screw. Having a polymerized part consisting of Shake correction shaft, characterized in that it is constituted by a chuck sleeve having a flange portion having a convex spherical bearing unit for sliding the bearing surface of the drive flange. 2. The shake correction shaft according to claim 1, wherein the driven flange is a bearing slant surface in which a bearing surface of the flange portion is an inclined surface.