JP2002028862A - Rotary dresser device for flat surface grinding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary dresser device for a flat surface grinding machine simple in structure and miniaturized and capable of easily and surely dressing and truing a grinding wheel. SOLUTION: This rotary dresser device for the flat surface grinding machine is provided with a dress shaft 7 mounted with a grinding wheel 5 for dressing and/or a grinding wheel 6 for truing thereon and arranged at a substantially right angle with the grinding wheel shaft 2, an intermediate shaft 8 for rotatably supporting the dress shaft 7, a first driving means 9 for rotating and driving the dress shaft 7, a linear bearing 10 for slidably supporting the intermediate shaft 8 in the shaft direction, a main body case 11 for holding the linear bearing 10 and a second driving means 12 for moving and positioning the intermediate shaft 8 in the shaft direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary dresser device for a surface grinder, wherein a truing wheel and / or a dressing wheel can be moved in a direction substantially perpendicular to the wheel axis.

[0002]

2. Description of the Related Art Conventionally, as a rotary dresser device used for a double-sided surface grinding machine or the like, there is a swing type device in which the whole is swung as described in JP-A-10-286773.

[0003] This rotary dresser device is intended for truing and dressing the grinding wheel surface of a cup-shaped grinding wheel, and a swing frame is laterally arranged below a pair of grinding wheels. The swing frame is pivotally supported on the machine frame vertically by a swing shaft arranged in parallel with the grinding wheel axis, and a truing grindstone and a dressing grindstone are mounted on the grinding wheel side end of the swing frame. The dress shaft is arranged vertically, the drive means for rotating the dress shaft is arranged at the opposite end of the swing frame, and one of the bearing boxes supporting the swing shaft,
Equipped with a swing frame driving means.

While the swing frame is reciprocated vertically by the swing driving means, the dress shaft is driven around its axis by the rotating drive means, and the dressing grindstone is used to drive the dressing wheel. Dressing (shape correction) is performed, and truing (sharpening) of the grinding wheel surface of the grinding wheel is performed with a truing wheel.

[0005]

In a conventional rotary dresser, dressing and truing are performed while reciprocatingly oscillating a swing frame in a vertical direction. It is necessary to swing the entire swing frame including the means, the mass on the swing side is large, and there is a problem that the whole device becomes very large.Moreover, when grinding the workpiece, it is necessary to There is a problem that there is no room in space and workability is poor due to the retreat.

A dress shaft is vertically arranged at an end of the swing frame on the side of the grinding wheel, and a rotary drive means is arranged at the other end of the swing frame so that the drive shaft is parallel to the dress axis. However, since the dressing shaft is driven to rotate by the drive shaft of the rotation driving means via a belt transmission mechanism arranged along the swing frame, the structure of the drive system of the dressing shaft becomes complicated. is there.

In view of the above problems, the present invention has a simple structure and can be miniaturized, and after dressing and / or truing, can be retracted to the machine frame side to secure a space. It is an object of the present invention to provide a rotary dresser device for a surface grinding machine capable of easily and reliably performing truing.

[0008]

SUMMARY OF THE INVENTION The present invention provides a dressing shaft on which a dressing grindstone and / or truing grindstone is mounted and which is disposed substantially perpendicular to the grindstone shaft, and an intermediate shaft rotatably supporting the dressing shaft. First driving means for rotatingly driving the dress shaft, a linear bearing for supporting the intermediate shaft slidably in the axial direction, a main body case for holding the linear bearing, and And a second driving means for enabling movement and positioning.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

The drawings illustrate a rotary dresser apparatus for a horizontal double-ended surface grinder. 1 to 3, reference numeral 1 denotes a machine frame of a horizontal double-sided surface grinder, on which a pair of grinding wheels 3 mounted on a grinding wheel shaft 2 are arranged so as to face each other. A rotary dresser device 4 is disposed below the grinding wheels 3 in the vertical direction. In addition, grinding wheel 3
Uses a cup-shaped diamond wheel.

The rotary dresser device 4 has a dressing shaft 7 on which a dressing grindstone 5 and a truing grindstone 6 are mounted and which is disposed substantially at right angles to the grindstone shaft 2, and rotatably supports the dress shaft 7 around its axis. An intermediate shaft 8, a first driving means 9 for rotatingly driving the dress shaft 7, a linear bearing 10 for supporting the intermediate shaft 8 slidably in the axial direction, a linear bearing 10 held by the machine frame 1, Supported body case 11
A second drive means 12 for moving and positioning the intermediate shaft 8 in the axial direction thereof; and three second drive means 12 arranged on the flange 24 of the main body case 11 at substantially equal intervals in the circumferential direction to adjust the inclination of the dress shaft 7. Tilt adjustment means to fix body case 11 to machine frame 1 so that
With 25.

The dressing grindstone 5 is for dressing the grindstone surface of the grinding grindstone 3, and the truing grindstone 6 is for truing the grindstone surface of the grinding grindstone 3. The dressing grindstone 5 and the truing grindstone 6 are provided with a holding plate 13 and a bolt 14 so that their outer peripheral surfaces can selectively contact the grindstone surface of the grinding grindstone 3.
It is detachably attached to the upper end of the dress shaft 7 at predetermined intervals in the up-down direction via the like. The two dressing whetstones 5 are arranged above the truing whetstone 6, but may be one. The dressing shaft 7 may be provided with only one of the dressing grindstone 5 and the truing grindstone 6.

The dressing shaft 7 is provided in the up-down direction, and is arranged substantially concentrically in a cylindrical intermediate shaft 8. Dress axis 7
Is rotatably supported on the intermediate shaft 8 via a bearing 15 near the lower side of the truing grindstone 6, and
The lower end is rotatably supported on the intermediate shaft 8 via a bearing 16.

The first drive means 9 is for driving the dressing grindstone 5 and the truing grindstone 6 via the dressing shaft 7 during dressing and truing of the grinding grindstone 3, and includes a drive motor such as a servomotor. And a drive source 17 made up of a grinding wheel 5 for dressing and a grinding wheel 6 for truing. The drive source 17 is detachably attached to the lower end of the intermediate shaft 8 so that the drive shaft 18 is located on the axis of the dress shaft 7, and the drive shaft 18 has a shaft joint 19 at the lower end of the dress shaft 7. It is removably connected via.

The intermediate shaft 8 is slidably supported in a vertical axial direction by a cylindrical linear bearing 10 in a main body case 11, and a dressing grindstone 5 or a truing grindstone 6 is attached to the grindstone surface of the grinding grindstone 3. The dressing grindstone 5 and the truing grindstone 6 can move up and down freely between a selectively corresponding dressing position and a truing position, and a retracting position where the dressing grindstone 5 and the truing grindstone 6 are separated from the grinding grindstone 3 and retracted.

The linear bearing 10 has a cylindrical shape which slidably holds the intermediate shaft 8, and is fitted and fixed substantially concentrically on the inner peripheral side of the main body case 11 and is fixed on the outer peripheral side of the intermediate shaft 8. A cylindrical bearing case 20, which is loosely fitted concentrically, is disposed on the inner peripheral surface side of the bearing case 20 at substantially equal intervals (for example, 6 at equal intervals) in the circumferential direction and in the sliding direction of the intermediate shaft 8 (up and down). And a plurality of ball rows 21 arranged in a row in the direction (direction), and the outer peripheral surface of the intermediate shaft 8 is supported via the ball rows 21. Although the linear bearing 10 is divided into a plurality of upper and lower parts, it may be integrated. A plurality of linear bearings 10 may be provided at predetermined intervals in the vertical direction.

The main body case 11 has a substantially cylindrical shape long enough to accommodate the intermediate shaft 8, and a linear bearing 10 is fitted between end plates 22 and 23 which are detachably attached to upper and lower ends thereof. The main body case 11 includes a dressing whetstone 5 and a truing whetstone.
6, a flange 24 is integrally formed on the outer periphery on the upper side, and the lower side of the flange 24 is loosely fitted into the mounting hole 26 of the machine frame 1. The body case 11 is covered with a protective cover 27 so as to be movable up and down relative to the flange 24, and the protective cover 27 is detachably fixed to the intermediate shaft 8 near the lower side of the truing whetstone 6. Have been. At the lower side of the main body case 11, there is a gap 28 on the inner periphery thereof, so that the drive source 17 can fit into the gap 28 when the intermediate shaft 8 rises.

The second driving means 12 includes a dressing whetstone 5
The truing whetstone 6 is for vertically moving and positioning the intermediate shaft 8 between a dressing position corresponding to the grinding wheel 3, a truing position, and a retracted position retracted from the grinding wheel 3. It is arranged on the lower side of the main body case 11 on the lower side. The second driving means 12 moves the dressing grindstone 5 up and down within a required range at the dressing position and the truing grindstone 6 at the truing position.

The second drive means 12 includes a rack gear 29 formed vertically on the outer peripheral surface of the lower portion of the intermediate shaft 8, a worm gear 30 meshing with the rack gear 29, and a worm gear 30.
And a drive source 32 such as a servo motor for driving the worm 31. Worm gear 30
Is a gear shaft 34 in a direction substantially perpendicular to the intermediate shaft 8 in the gear case 33.
, And is meshed with the rack gear 29 on the side of the intermediate shaft 8 in a notch 35 formed in the linear bearing 10. The gear shaft 34 is provided on the side of the lid 36 detachably mounted on the gear case 33.

The gear case 33 is removably mounted on the outer surface of the main body case 11 so as to correspond to the notch portion 35. In the gear case 33, a worm 31 is provided below the worm gear 30. The worm shaft 37 provided is rotatably supported by a bearing. The worm shaft 37 includes the intermediate shaft 8 and the gear shaft 34.
Is arranged in a direction substantially perpendicular to the axial direction of the
The drive shaft 32 of the drive source 32 is operatively connected to a drive shaft 41 via a reduction gear train 40 in 39. The drive source 32 is removably mounted on the gear case 33 via a reduction case 39, and the drive shaft 41 is arranged substantially parallel to the worm shaft 37.

As shown in FIGS. 4 and 5, the tilt adjusting means 25 has a ring-shaped receiving member 42 arranged on the machine frame 1 on the outer periphery of the main body case 11, and is disposed on the receiving member 42. A spherical washer 43, a vertical screw hole 44 formed in the flange 24, an adjusting screw 45 screwed into the screw hole 44, and an operation for the adjusting screw 45 disposed above the flange 24. Body 46, operating body 46, adjustment screw body 45, spherical washer 43
And the machine frame 1
And a fastening bolt 47 screwed into the screw hole on the side.

The spherical washer 43 has a spherical concave portion 43a formed on the upper side, and is fitted in a concave portion 48 formed below the screw hole 44 of the flange portion 24. In the adjusting screw body 45, a spherical projection 45a that is in surface contact with the spherical recess 43a of the spherical washer 43 is formed on the lower side, and an engaging recess 45b is formed on the upper surface in a diametric direction. The operating body 46 is for operating the adjusting screw body 45, and has a tool engaging portion 46a for rotating operation at an appropriate place, such as forming an outer periphery in a six stroke shape.
And an engaging protrusion 46b for engaging with the engaging recess 45b of the adjusting screw body 45 in the screw hole 44, and is interposed between the head 47a of the tightening bolt 47 and the flange 24. ing.

The adjusting screw 45 and the operating body 46 are
When turning 46, the adjusting screw body 45 rotates in the screw hole 44,
In addition, it is sufficient that the adjusting screw body 45 and the operating body 46 are engaged so as to allow the relative movement of the tightening bolt 47 in the axial direction.
An engagement protrusion 46b may be provided on the adjustment screw body 45 side, and an engagement recess 45b may be provided on the operation body 46 side.

In the rotary dresser device 4, dressing and truing of the grinding wheel 3 are performed as follows. That is, when dressing or truing the grinding wheel surface of the grinding wheel 3, the dressing shaft is controlled by the first driving means 9.
7 to drive dressing grindstone 5 around dress axis 7.
With the truing grindstone 6 rotated, the second driving means 12 rotates the intermediate shaft until the dressing position where the dressing grindstone 5 contacts the grinding grindstone 3 or the truing position where the truing grindstone 6 contacts the grinding grindstone 3. 8
Is raised, and the dressing grindstone 5 or the truing grindstone 6 is reciprocally slid vertically within the required range at that position, while the rotating dressing grindstone 5 or the truing grindstone 6 is used to rotate the grinding grindstone. 3. Dressing or truing the ground surface.

When the drive source 32 of the second drive means 12 is started, the worm gear meshing with the rack gear 29 on the intermediate shaft 8 side from the drive shaft 41 via the reduction gear train 40, the worm shaft 37, and the worm 31. As the worm gear 30 rotates forward and backward, the intermediate shaft 8 slides in the axial direction while being guided by the linear bearing 10, and moves up and down.

Therefore, when dressing and truing the grinding wheel 3, the intermediate shaft 8 including the dressing wheel 5, the truing wheel 6, the dressing shaft 7, and the first driving means 9 may be slid in the axial direction. Therefore, the mass on the sliding side is smaller than that of the conventional swing type, and it is structurally simple and compact. In addition, since the intermediate shaft 8 supporting the dress shaft 7 is reciprocated in the axial direction, the support rigidity can be easily secured as compared with the case where the dress shaft 7 is moved in the axial direction. Truing can be performed easily and reliably with high precision.

Further, a cylindrical linear bearing is provided in the main body case 11.
Since the intermediate shaft 8 is slidably supported in the axial direction from the outer peripheral side by the linear bearing 10, the intermediate shaft 8 is supported and guided slidably in the axial direction by other support structures. In comparison with the above, the whole body including the main body case 11 can be made relatively small in diameter and can be downsized.

The second drive means 12 for driving the intermediate shaft 8 in the axial direction includes a rack gear 29 on the intermediate shaft 8 side, and a worm gear 30 on the main body case 11 side meshing with the rack gear 29. The worm gear 30 is used as a drive source outside the main body case 11.
Since it is driven by 32, it can be simplified compared to the one using a screw shaft or the like. Moreover, since the worm 31 and the worm gear 30 are used, the positional accuracy of the dressing whetstone 5 and the truing whetstone 6 can be sufficiently ensured and maintained despite the adoption of the rack system.

Furthermore, a notch 35 is formed in a part of the linear bearing 10 in the circumferential direction, and the worm gear 30 disposed in the notch 35 is engaged with the rack on the intermediate shaft 8 side.
The axial length of the entire apparatus including the intermediate shaft 8 and the like can be reduced while ensuring a sufficient range in the axial direction where the linear shaft 10 can support the intermediate shaft 8.

By adjusting the three tilt adjusting means 25, the tilt of the dress shaft 7 can be adjusted in any direction within a predetermined range.
At the time of this adjustment, the tightening bolt 47 is first loosened, and then the operating body 46 is turned in a predetermined direction by a suitable tool. Then, the adjusting screw body 45 screwed into the screw hole 44 of the flange portion 24 rotates in a predetermined direction, and the adjusting screw body 45 moves up or down relative to the flange portion 24.

In this case, since the spherical projection 45a of the adjusting screw body 45 is in surface contact with the spherical concave portion 43a of the spherical washer 43, the adjusting screw body 45 relatively moves on the spherical washer 43 according to the amount of rotation. Incline. Therefore, the adjusting screw body of the three inclination adjusting means 25
By appropriately adjusting 45, the entire body case 11 side including the dress shaft 7 is inclined in an arbitrary direction, and the inclination of the dress shaft 7 can be easily adjusted in an arbitrary direction. After that, the fastening bolts 47 may be tightened and fixed. When the tightening bolt 47 is tightened, it can be fixed in a state where the spherical projection 45a of the adjusting screw body 45 is in surface contact with the spherical recess 43a of the spherical washer 43.

Although the embodiment of the present invention has been described in detail, the present invention is not limited to this embodiment.
For example, in the embodiment, the horizontal double-sided surface grinding machine is exemplified, but a vertical double-sided surface grinding machine in which a pair of grinding wheels 3 are arranged vertically, or a single-head surface grinding in which the grinding wheel 3 is arranged only on one side. The same can be applied to a board.

In the embodiment, two dressing whetstones 5 and one truing whetstone 6 are provided on the upper end side of the dress shaft 7.
And a grinding wheel for dressing.
5 may be one. Further, the present invention can be similarly carried out even when one of the dressing whetstone 5 and the truing whetstone 6 is provided on the dress shaft 7.

The first driving means 9 for driving the dress shaft 7 includes:
In addition to the axially movable intermediate shaft 8 side, the main body case
It is also possible to provide on the 11 side. In this case, the drive source 17 of the first drive means 9 is fixed to the main body case 11 side, and its drive shaft 1
The shaft 8 and the dressing shaft 7 may be configured to allow the intermediate shaft 8 to slide in the axial direction via an expansion joint, a sliding joint, or the like.

The linear bearing 10 for guiding the intermediate shaft 8 slidably in the axial direction is most desirably formed in a cylindrical shape as exemplified in the embodiment, but the linear bearing 10 parallel to the axial direction of the intermediate shaft 8 is preferred. May be arranged in the circumferential direction on the inner peripheral side of the main body case 11, and the intermediate shaft 8 may be slidably guided in the axial direction by the plurality of linear bearings 10. Further, even when the linear bearing 10 holding the intermediate shaft 8 is used, the linear bearing 10 may be divided into a plurality of parts in the circumferential direction of the intermediate shaft 8.

The number of inclination adjusting means 25 may be four or more. Further, the spherical washer 43 of the inclination adjusting means 25 may be integrated with the receiving body 42, or when the spherical washer 43 is used, the receiving body 42 may be omitted. Further, the inclination adjusting means 25 may have another structure. However, at the same time as tilt adjustment
It is desirable that 11 can be fixed.

The second drive means 12 may not use the rack gear 29, the worm gear 30, etc., for example, may use a ball screw or the like. The rack gear 29 may be formed integrally with the outer peripheral surface of the intermediate shaft 8, or may be mounted separately on the outer peripheral surface of the intermediate shaft 8.

[0038]

According to the present invention, a dressing shaft on which a truing grindstone and / or a dressing grindstone is mounted and which is disposed substantially at right angles to the grindstone shaft, an intermediate shaft rotatably supporting the dressing shaft, First driving means for driving the dressing shaft, a linear bearing for supporting the intermediate shaft slidably in the axial direction, a main body case for holding the linear bearing, and a second case for moving and positioning the intermediate shaft in the axial direction. Since two driving means are provided, the structure is simple and compact, and after dressing and / or truing, the truing whetstone and / or the dressing whetstone are retracted to the machine frame side to secure a space and improve workability. In addition, there is an advantage that the shape of the grinding wheel can be corrected and / or sharpened easily and reliably.

The intermediate shaft is formed in a cylindrical shape, and the linear bearing is formed in a cylindrical shape. The first shaft is provided at the end of the intermediate shaft opposite to the truing grindstone and / or the dressing grindstone.
Since the drive means are mounted in series, the diameter of the whole including the intermediate shaft, the linear bearing and the main body case can be reduced, and
Although the intermediate shaft slides in the axial direction, the structure on the first driving means side can be simplified.

Further, the second drive means includes a rack gear provided in the axial direction of the intermediate shaft, a gear meshing with the rack gear, and a drive source for driving the gear.
The structure on the driving means side can be simplified.

Further, since at least three inclination adjusting means for fixing the flange portion of the main body case to the machine frame and adjusting the inclination of the dress axis are arranged at substantially equal intervals in the circumferential direction of the main body case, the dress axis is provided. And the body case can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rotary dresser device showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the rotary dresser device showing one embodiment of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 1;

FIG. 4 is a longitudinal sectional view of an adjusting unit according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a tilt adjusting unit according to an embodiment of the present invention.

[Explanation of symbols]

 2 Grinding wheel shaft 5 Dressing whetstone 6 Truing whetstone 7 Dress shaft 8 Intermediate shaft 9 First drive means 10 Linear bearing 11 Main body case 12 Second drive means 24 Flange 25 Tilt adjusting means 29 Rack gear 30 Worm gear

Claims (4)

[Claims] 1. A dressing shaft on which a dressing whetstone and / or a truing whetstone is mounted and arranged substantially at right angles to a whetstone shaft, an intermediate shaft rotatably supporting the dressing shaft, and a rotational drive of the dressing shaft. A first driving means, a linear bearing for supporting the intermediate shaft slidably in the axial direction, a main body case for holding the linear bearing, and a second case for enabling the intermediate shaft to be moved and positioned in the axial direction. A rotary dresser device for a surface grinding machine, comprising: two driving means. 2. The method according to claim 1, wherein the intermediate shaft has a cylindrical shape.
2. The linear bearing according to claim 1, wherein the linear bearing is formed in a cylindrical shape, and the first driving unit is mounted in series at an end of the intermediate shaft opposite to the dressing grindstone and / or truing grindstone. 3. A rotary dresser device for a surface grinding machine as described in the above. 3. The second driving means includes: a rack gear provided in the axial direction of the intermediate shaft; a gear provided on the body case side and meshing with the rack gear; and a drive for rotating the gear. And a source.
Or a rotary dresser device for a surface grinder according to 2. 4. The apparatus according to claim 1, wherein at least three inclination adjusting means for fixing the flange portion of the main body case to the machine frame and adjusting the inclination of the dress shaft are arranged substantially equally in a circumferential direction of the main body case. The rotary dresser device for a surface grinding machine according to any one of claims 1 to 3, wherein: