JP2000110910A - Indexing locating device for revolving body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the manual locating operation for indexing in revolution of a revolving body. SOLUTION: An indexing locating device for a revolving body supported on a support resolvably round the center of revolution is equipped with stopping members 50 and 60 for suppressing revolutions of the revolving body in the specified angular position in indexing, and the stooping members are provided selectively in a plurality of positions revolved round the mounting axis and perform suppression and out of suppression of the revolution of the revolving body depending upon the revolutional position. For example, the stopping members are mounted on the support selectively in a plurality of attitudes upon being revolved round the mounting axis and furnished with engaging parts 52 and 62 capable of abutting to the abutting part of the revolving body in such a positioning eccentric from the mounting axis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indexing and positioning device for a revolving body, for example, a revolving tool head in a machine tool, a revolving work table, and the like.

[0002]

2. Description of the Related Art A swivelable grindstone of a prior art grinder is of a type that rotates by power (for example, Japanese Utility Model Publication No. 7-319).
No. 57 gazette) and a type of turning by manual operation of an operator. In the case of turning by power, the turning drive means is controlled in accordance with the detected value of the turning angle to perform index positioning, and in the case of turning by manual operation, turning between the turning movable portion and the fixed portion is performed. The displacement is indexed and read by visually reading the scale.

[0003]

The above-mentioned prior art, in which the indexing and positioning is performed by power using the wheel head of the revolvable grinding machine, has a complicated structure and is expensive. In addition, in the type of turning by manual operation, the structure is simplified and the cost is reduced, but the operation by the operator is troublesome. SUMMARY OF THE INVENTION It is an object of the present invention to simplify the operation of an operator while adopting a form in which the structure is simplified and the cost is reduced in a swivelable grindstone base, which is manually operated.

[0004]

A revolving structure indexing and positioning device according to the present invention suppresses the revolving structure at a predetermined indexing angular position and a revolving structure supported by a support so as to be revolvable about a revolving center. A revolving structure indexing and positioning device having a stop member, wherein the stop member is selectively provided with a plurality of postures rotated about a mounting axis, and the turning posture suppresses and non-suppresses the turning of the revolving body. Is selectively performed.

[0005] In particular, the stop member is selectively attached to the support in a plurality of postures swiveling around the mounting axis, and the stop member has an engaging portion capable of abutting against the abutting portion of the revolving body from the mounting axis. It is formed with your heart in mind.

Another type of stop member is provided on the support so as to be pivotable about a mounting axis to first, second and third positions, and the stop member is separated from the revolving body in the pivot direction. The first and second contact portions at two positions are formed eccentrically from the mounting axis so as to contact the first contact portion and the second contact portion. The turning of the turning body makes contact with the first contacting part, the turning of the turning body in the other direction at the second position makes the contact with the second contacting part, and the turning of the turning body does not engage with the engaging part of the turning body at the third position. ing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In an embodiment of the present invention, a grindstone head capable of turning and indexing a grinder will be exemplified as a revolving body, and the grindstone head will be described with reference to the drawings. 1 and 2
In FIG. 3 and FIG. 3, the bed 1 is cut along a guide surface (for example, a V slide surface 3 and a flat slide surface 4) by a ball screw mechanism 2 in which a grindstone H is rotationally driven by a drive source (not shown). 1, a traverse table 7 provided with a work headstock 5 and a tailstock 6 facing each other in the traverse direction (left and right directions in FIG. 1). It is mounted so that it can be moved in the traverse direction by a feeding device (not shown).

[0008] As shown in Figs. 3 and 4,
It is slidably mounted on the V slide surface 3 and the flat slide surface 4 on the bed 1, and is cut by the ball screw mechanism 2 in the cutting direction (FIG. 3).
Moving table 11, moving table 1 in the direction perpendicular to the paper surface
1, the turning base 12, which is mounted on a circular guide bearing 12 a in the outer peripheral area of the turning base 12 so as to be able to turn and slide, and on the center axis of the turning base 12 as described later. The upper end of the piston rod of the fixed piston 17 provided is defined as the central shaft portion 13, which is defined as the center of rotation (the center of rotation P in FIG. 1), and guided by the circular guide support portion 12 a in the outer peripheral area of the rotating base 12. The swivel 14 and the grindstone main body 15 integrally mounted on the swivel 14 are stacked.

That is, the turning base 12 is fixed on the moving base 11 by fixing bolts inserted into bolt holes of a flange portion 12c described later (see FIG. 11), and the fixed base is integrated with the moving base 11. Thus, the grindstone main body 15 integrated with the swivel base 14 serves as a swivel body for the movable base 11 and is indexed and positioned.

[0010] In the center area of the upper surface of the turning base 12, a concave part which is open upward is formed, and the guide support part 12a in the outer peripheral area thereof is
A guide projection is formed on the outer periphery, a suitable slide material is attached to the bearing surface, and the lubricating oil passage 12b is open. The lubricating oil passage 12b includes the moving base 11 and the turning base 1
2 and communicates with an external lubricant supply source (not shown).

At the lower end of the outer peripheral surface of the turning base 12, positioning stoppers (50, 60, 7) which stand upright as described later are provided.
0,80) is formed in the required circumferential range (see FIG. 11) to the entire circumference. A flange portion 14c is formed all around the upper end of the outer peripheral surface of the swivel base 14, and a lower surface thereof is fitted to the outer peripheral surface of the swivel base 14 to guide the projecting portion of the support portion 12a of the swivel base 12. A cylindrical labyrinth member 23 with a turning angle scale that engages with the bolt is fixed by bolting.

Further, on the lower surface of the flange portion 14c, an arcuate cylindrical contact member 40 hanging down in the outer peripheral region of the cylindrical labyrinth member 23 as described later is detachably attached by bolting. In the example shown in the drawing, the flange portion 14 c has a cylindrical labyrinth member 2 other than the attachment range of the contact member 40.
Although the diameter is reduced to the required mounting diameter of 3, the diameter may be uniform over the entire circumference.

As shown in FIG. 4, an upwardly open concave portion formed in the central area of the turning base 12 has a space for accommodating positioning fixing means surrounding the fixing piston 17 together with the central space of the annular turning table 14. The upper portion of the space 16 is covered with a lid 14 a attached to the swivel 14. In the space 16, a fixed piston 17 is provided on the center axis line of the swivel base 12, the lower end of a piston rod of the fixed piston 17 is fixed to the swivel base 12, and the upper end of the piston rod is a lid of the swivel base 14. It penetrates the center hole 14b of the portion 14a.

A first annular body 19 of a hearth coupling is mounted on the lower surface of the flange 18a on the outer periphery of the movable cylinder 18 surrounding the fixed piston 17, and the first annular body 19 is mounted on the bottom of the space 16. A second annular body 20 and a third annular body 21 of the hearth coupling facing the body 19 are provided in a concentric inner and outer relationship. Radial engagement teeth meshing with each other are formed on the opposing surfaces of the first annular body 19, the second annular body 20, and the third annular body 21, respectively.

The inner second annular body 20 is fixed to the bottom of the space 16. The outer third annular body 21 is bolted to the lower end of the elastic bellows cylindrical body 22 inserted between the outer peripheral surface of the flange portion 18 a of the movable cylinder 18 and the outer peripheral surface of the first annular body 19 and the inner peripheral surface of the space 16. It is fixed. The upper end of the elastic bellows cylindrical body 22 having rigidity in the rotation direction and functioning as a tension spring in the axial direction is provided with a swivel table 14 and its lid 14.
It is fixed to a by bolts.

Since the outer third annular body 21 is attached to the movable swivel 14 via the elastic bellows cylindrical body 22, it is possible to absorb an assembling error in assembling the apparatus, thereby simplifying the operation and reducing production. Cost is reduced. An oil passage 18d and an oil passage 18e communicate with an upper oil chamber 18b and a lower oil chamber 18c of a movable cylinder 18, which is vertically divided by a fixed piston 17, and a switching valve (not shown) is connected to the oil passage 18d and the oil passage 18e. It is connected to a pressure oil source and an oil tank via the same.

As shown in FIG. 1 and FIG.
A grindstone shaft driving motor 24 is mounted on the top of 5, that is, on the upper surface of the lid 15b, and a pulley 25 is mounted on the motor shaft. On the front side (traverse table 7 side) of the grinding wheel main body 15 at the normal position, a horizontal grinding wheel shaft 2 having both ends protruding from both left and right sides of the grinding wheel main body 15.
6 is rotatably supported, a flat grindstone G1 is provided on one protruding portion of the grindstone shaft 26, and an angular grindstone G2 is provided on the other protruding portion.
Is attached, and one of the protrusions
A pulley 28 around which a belt 27 is wound is attached to a pulley 25 of a motor shaft of the grinding wheel shaft driving motor 24.

A grinding wheel shaft bearing device 31 for supporting an inner surface grinding wheel shaft 30 parallel to the grinding wheel shaft 26 via a bracket 29 and a motor 32 for driving the grinding wheel shaft are mounted on the rear side of the grinding wheel body 15. The internal grinding wheel shaft 30 and the motor shaft of the wheel shaft driving motor 32 are connected by a belt / pulley transmission mechanism 33. At the tip of the inner surface grinding wheel shaft 30, a grinding wheel G3 for inner surface grinding is mounted.

In the wheelhead H, the wheelhead body 15 is pivoted so that the desired wheel (flat wheel G1, angular wheel G2 or inner surface grinding wheel G3) is in the required direction with respect to the way the traverse table 7 is fed. It is positioned at the required index position around it. In the illustrated example, in the case of grinding with the flat grinding wheel G1, the grinding wheel head is set so that the grinding wheel shaft 26 is parallel to the feed direction of the traverse table 7 on the front surface of the grinding wheel table H as shown in FIGS. The main body 15 is indexed and positioned. (For example, indexing angle 0
Every time)

In the case of grinding with an angular grindstone G2, as shown in FIG. 15, a grindstone shaft 26 is in front of a grindstone table H, and one of the grindstone surfaces crossing at right angles is parallel to the feed direction of the traverse table 7. The grindstone main body 15 is indexed and positioned so that the other is vertical. (For example, indexing angle 30 degrees)

In the case of the inner surface grinding with the inner surface grinding wheel G3, as shown in FIG. 15, the inner surface of the grinding wheel main body is set so that the inner surface grinding wheel shaft 30 is parallel to the feed direction of the traverse table 7 on the front surface of the grinding wheel base H. 15 is indexed and positioned. (For example, indexing angle 180 degrees)

The indexing positioning of the main body 15 which can be swiveled is performed in such a manner that when the swivel base 14 is swung, the contact member 40 attached to a predetermined circumferential position of the flange portion 14c of the swivel base 14 is rotated. Positioning stoppers (50, 50) attached at predetermined circumferential positions of the flange portion 12c
60, 70, and 80) (see FIGS. 11 to 14), the contact member 40 and the positioning stoppers (50, 60, 70, and 80) will be described.

As shown in FIGS. 5 and 6, a contact member 40 is attached to a predetermined circumferential position of the flange portion 14c of the swivel base 14 by bolts 91, 91 inserted into bolt holes 40c, 40c described later. Is formed from an arc-shaped base 40a having a quadrangular cross section and an arc-shaped cylindrical body 40b that extends downward on the inner peripheral side of the base 40a and has a width that is substantially half the base 40a. The inner peripheral surface of the arc-shaped cylindrical body portion 40b is the same cylindrical surface, and the base portion 40a has an appropriately longer arc length than the arc-shaped cylindrical body portion 40b, and the bolt holes 4 in the vertical direction are formed.
Portions where the holes 0c and 40c are formed protrude from both ends of the arc-shaped cylindrical body 40b. The lower end surface of the arc-shaped cylindrical body portion 40b protrudes with a narrow arc length on one side end surface 40f side to form a step portion 40d.

The arc length and side end face 4 of the arc-shaped cylindrical body 40b
The arc length between 0f and the step portion 40d is determined by the positioning stopper (5) attached to the flange portion 12c of the turning base 12.
0, 60, 70, 80) is determined as described later in relation to the mounting position and dimensions. The inner diameter of the contact member 40 is slightly larger than the outer diameter of the cylindrical labyrinth member 23, and the axial length is equal to the flange 12 c of the turning base 12 when attached to the flange 14 c of the turning base 12. The end portions 40e, 40f of the contact member 40 and the step portion 40d have a length capable of contacting the upright engaging portions of the positioning stoppers (50, 60, 70, 80) attached to the positioning stoppers (50, 60, 70, 80). 60, 70, 80).

Next, the positioning stoppers (50, 60, 70, 80) for positioning each indexing angle, which are mounted at predetermined circumferential positions of the flange portion 12c of the turning base 12, will be described. As shown in FIG. 7, a first positioning stopper 50 used for positioning at an index angle of 0 degree and 180 degrees.
Is a base 51 attached to the upper surface of the flange 12c.
And an upright engaging portion 52 standing upright therefrom. The base portion 51 has bolt holes 53, 53 for mounting bolts at both ends of the base portion 51 which is appropriately narrower than the width of the flange portion 12c and has an appropriate length. The upright engaging portion 52, which is formed in a vertical direction and has a rectangular planar shape, has a required height of approximately half the width of the base portion 51 and has a required height at the center between the bolt holes 53, 53 in the width direction. It stands upright on one side.

The first positioning stopper 50 is provided with a bolt hole 53 at a predetermined circumferential position on the upper surface of the flange portion 12c of the turning base 12, that is, at a 0-degree position A and a 180-degree position B, respectively. It is attached by bolts 92, 92 inserted in 53. The first posture in which the upright engagement portion 52 is on the turning center P side, that is, the inside, and the outer peripheral side of the turning base 12, that is, the second posture. Is selected and fixed.

The height of the upright engaging portion 52 is such that it can come into contact with the contact member 40 attached to the flange portion 14c of the swivel base 14 when attached in the first position (see FIG. 11). In addition, both end surfaces of the upright engagement portion 52 are contact surfaces with both end surfaces 40e and 40f of the contact member 40.

As shown in FIG. 8, a second positioning stopper 60 used for positioning at an indexing angle of 30 degrees has the same width as the base 61 at the center of the base 61, which is appropriately narrower than the width of the flange 12c and has an appropriate length. Thus, an upright engaging portion 62 having a required height is formed. The base portion 61 on one end side from the upright engaging portion 62 has an S-shaped planar shape, and the first concave portion 6 on the upright engaging portion 62 side.
3 and a second concave portion 64 on the distal end side are formed so as to open to opposite sides, and a bolt hole 65 for a mounting bolt is vertically formed in the other end of the base 61.

The second positioning stopper 60 is provided with a holding piece 66 used for attaching the second positioning stopper 60 to the flange portion 12c. The holding piece 66 is a block having a concave shape on the side surface forming an upward recess 67 sized to be able to contact the base 61 of the second positioning stopper 60, and the bolt holes 6 for the lateral mounting bolts at both ends.
8,68 are drilled. And, it is detachably attached to the outer peripheral surface of the flange portion 12c of the turning base 12 by a bolt inserted into the bolt holes 68, 68 at a position corresponding to the second positioning stopper 60.

The second positioning stopper 60 is attached by a bolt 93 inserted into the bolt hole 65 at a predetermined circumferential position on the upper surface of the flange portion 12c of the turning base 12, that is, at a 30 ° position C as described later. Then, the first posture is turned around the bolt 93 to move outward from the flange portion 12c, or the flange portion 12c of the turning base 12 is rotated.
Is fixed to the second posture or the third posture along the arrow.

In the first position (see FIGS. 8 and 11),
One end of the base 61 having an S-shaped planar shape is engaged with and fixed to the recess 67 of the holding piece 66. In the second posture (see FIG. 12), the flange portion 12 is positioned away from the bolt 93.
The second concave portion 64 engages and is fixed to the bolt 95 screwed into the position c, and the upright engaging portion 62 moves away from the 0 degree position. In the third posture (see FIG. 13), the first recess 63 is engaged with and fixed to the bolt 96 screwed into the flange portion 12 c at a position opposite to the bolt 93 around the bolt 93,
The upright engagement portion 62 approaches the 0-degree position.

The first position of the second positioning stopper 60
The posture changing operation between the second posture and the third posture includes the bolt 93 inserted into the bolt hole 65, the bolt 96 engaging with the first recess 63, and the bolt 95 engaging with the second recess 64.
You only have to loosen it a little without removing it from the screw hole,
After the posture change, the bolts 93, 95 and 96 need only be tightened again, so that the operation is simple and there is no risk of the second positioning stopper 60 and the bolts being lost. The work of changing the posture of the first positioning stopper 50 is rarely performed, whereas the work of changing the posture of the second positioning stopper 60 is frequently performed.

The height of the upright engaging portion 62 is as shown in FIG.
30 degree position C on the upper surface of the flange portion 12c of the turning base 12
When it is mounted in the third position, it does not come into contact with one side end surface 40e of the contact member 40 attached to the flange portion 14c of the swivel table 14, but comes into contact with the step portion 40d. The end surface of the joint portion 62 on the bolt 93 side is a contact surface with the contact member 40.

In the illustrated example, the indexing angle of the grinding wheel head H is
A first limit stopper 70 and a second limit stopper 80, which are of three types of 0 degree, 30 degrees and 180 degrees, and which are symmetrically defined to define both-end limit stop positions outside the index angle range are provided. As shown in FIGS. 9 and 10, the first and second limit stoppers 70 and 80 have an L-shaped side surface, and the width is appropriately smaller than the width of the flange portion 12c.

A base 71 of an appropriate length, at least an inner surface of which is a cylindrical concave surface having the same shape as the inner peripheral surface of the contact member 40,
81 is a bolt hole 72, 7 for a vertical mounting bolt.
2: 82, 82 are drilled side by side. Since the first limit stopper 70 and the second limit stopper 80 are symmetrically identical, only the positions of the upright engaging portions 73 and 83 are opposite when the ends of the base portions 71 and 81 are viewed from the cylindrical concave surface side. Is the difference.

The first limit stopper 70 and the second limit stopper 80 are positioned at a predetermined circumferential position on the upper surface of the flange portion 12c of the turning base 12, that is, at positions -15 degrees and -15 degrees.
It is attached to the 95-degree position E by bolts 97, 97 inserted into the bolt holes 72, 72; 82, 82, but the cylindrical concave side is located on the turning locus of the inner peripheral surface of the contact member 40, and the upright engagement is performed. The parts 73 and 83 face each other toward the turning area of the contact member 40. (See Fig. 11)

The height of the upright engaging portions 73 and 83 is such that the abutting member 40 attached to the flange portion 14c of the swivel base 14 when mounted on the flange portion 12c of the swivel base 12.
And the outer end surfaces of the upright engaging portions 73 and 83 are abutting surfaces with the abutting members 40.

The operation of the grinding machine provided with the grinding wheel head H will be described. The workpiece W supported between the work headstock 5 and the tailstock 6 or supported by the work headstock 5 is:
The work headstock 5 is driven to rotate. The traverse table 7 is moved in the traverse direction by a feeding device (not shown).

On the other hand, in the grindstone head H, the grindstone body 15 is rotated about the center of rotation P so that the desired grindstone (flat grindstone G1, angular grindstone G2, or grindstone G3 for inner surface grinding) is oriented in a required direction with respect to the workpiece. It is positioned at the required indexing position. In the case of grinding with the flat whetstone G1, FIGS.
As shown in FIG. 5, the grindstone main body 15 is indexed and positioned so that the grindstone shaft 26 is parallel to the feed direction of the traverse table 7 on the front surface of the grindstone head H. (For example, indexing angle 0 degrees)

In the case of the grinding process using the angular grindstone G2, as shown in FIG. 15, the grindstone shaft 26 is in front of the grindstone table H, and one of the grindstone surfaces crossing at right angles is parallel to the feed direction of the traverse table 7. The grindstone main body 15 is indexed and positioned so that the other is vertical. (For example, indexing angle 30 degrees)

In the case of the inner surface grinding by the inner surface grinding wheel G3, as shown in FIG. 15, the inner surface of the wheel head main body is set so that the inner surface grinding wheel shaft 30 is parallel to the feed direction of the traverse table 7 in front of the wheel head H. 15 is indexed and positioned. (For example, indexing angle 180 degrees)

The first positioning stoppers 50, 50, the second positioning stopper 60, and the first and second limit stoppers 70 and 80 are located at predetermined circumferential positions on the upper surface of the flange portion 12 c of the turning base 12. A, B, C,
The first positioning stopper 5 is attached to D and E in accordance with a desired indexing angle prior to indexing positioning of the wheel head main body 15 around the turning center P in the wheel head H.
The mounting positions of the 0, 50 and the second positioning stopper 60 are changed.

In the case of index positioning at index angles of 0 ° and 180 °, as shown in FIG. 11, the first positioning stoppers 50, 50 are at the 0 ° position A and 180 ° in the first posture. The second positioning stopper 60 is attached to the position B, and the second positioning stopper 60 is attached to the position C at 30 degrees in the first posture.

Then, when the swivel base 14 and the grindstone main body 15 rotate clockwise and counterclockwise in FIG.
0 passes through the inner peripheral side of the upright engaging portion 52 of the second positioning stopper 60 in the first posture, but the upright engaging portion 52 of the first positioning stopper 50 at the 0 degree position A has a contact member. 40
The side end surface 40e of the turning table 14 and the grinding wheel base body 15
Is the 0-degree indexing position, and the upright engaging portion 52 of the first positioning stopper 50 at the 180-degree position B is
The side end face 40f of the wheel abuts, and the swivel 14 and the grindstone body 15
Is a 180-degree indexing position.

The arc length between one side surface of the upright engaging portion 52 of the first positioning stopper 50 at the 0-degree position A and the other side surface of the upright engaging portion 52 of the first positioning stopper 50 at the 180-degree position B. The angle formed by the arc length obtained by adding the arc length of the contact member 40 is 180 degrees.

In the case of indexing at index angles of 0 ° and 30 °, as shown in FIG. 12, the first positioning stopper 50 is attached to the 0 ° position A in the first posture, and The 2 positioning stopper 60 is attached to the position C at 30 degrees in the second posture.

Then, when the swivel base 14 and the grindstone main body 15 are rotated clockwise and counterclockwise in FIG.
0 indicates that the side end surface 40e of the contact member 40 contacts the upright engaging portion 52 of the first positioning stopper 50 at the 0 degree position A,
The swivel base 14 and the grindstone main body 15 are located at the 0-degree indexing position, and the upright engaging portion 62 of the second positioning stopper 60 at the 30-degree position C is brought into contact with the side end face 40f of the contact member 40,
The swivel 14 and the grindstone main body 15 are at a 30-degree indexing position.

In the case of indexing at the indexing angles of 30 degrees and 180 degrees, as shown in FIG. 13, the first positioning stopper 50 is attached to the 180 degree position B in the first posture, and The 2 positioning stopper 60 is attached at the 30 ° position C in the third posture.

Then, when the turntable 14 and the grindstone main body 15 turn clockwise and counterclockwise in FIG.
The step portion 40d of the abutment abuts on the upright engaging portion 62 of the second positioning stopper 60 at the 30 ° position C, and the turntable 14 and the grindstone main body 15 are located at the 30 ° indexing position. 40f is the first positioning stopper 5 at the 180 degree position B
The rotating table 14 and the grindstone main body 15 are brought into the 180-degree indexing position by contacting the upright engaging portion 52 of the zero. The arc length between the side end surface 40f of the contact member 40 and the step portion 40d is equal to the length of one side surface of the upright engaging portion 62 of the second positioning stopper 60 in the second posture and the upright engaging portion 62 of the stopper 60 in the third posture. It corresponds to the arc length between the other side.

In addition to the above-described case of positioning at a specific angle, in the case where the turntable 14 and the grindstone base body 15 are turned arbitrarily within the range between both end limit angles (for example, -15 degrees to 195 degrees), For example, when tapering by plunge cutting, when indexing and positioning the grindstone surface so as to be inclined by a desired taper inclination angle, the 0 degree position A
The first positioning stopper 50 at the 0-degree position B is attached in the second posture, and the second positioning stopper 60 at the 30-degree position C is attached in the first posture.

Then, when the turntable 14 and the grindstone main body 15 turn clockwise and counterclockwise in FIG.
0 passes through the inner peripheral side of the upright engaging portion 52 of the first positioning stopper 50 in the second posture and the inner peripheral side of the upright engaging portion 62 of the second positioning stopper 60 in the first posture. ,
Upright engaging portion 7 of first limit stopper 70 at -15 degree position D
3, the side end surface 40 e of the contact member 40 abuts, and the turntable 14 and the grindstone body 15 are at the -15 degree stop position,
Upright engagement portion 83 of second limit stopper 80 at 95 degree position D
, The side end surface 40f of the contact member 40 is in contact with the
4. The wheel head body 15 is at the 195 degree stop position. That is, the swivel 14 and the grindstone main body 15 are in the range of -15 degrees to 19 degrees.
Any angular position can be set within a range of 5 degrees.

Then, under the control of a switching valve (not shown), pressure oil is supplied from a pressure oil source (not shown) to an upper oil chamber 18b of the movable cylinder 18 via an oil passage 18d, and the pressure oil is supplied from a lower oil chamber 18c. When the oil is discharged to an oil tank (not shown) through the oil passage 18e, the first annular body 19 of the hearth coupling that rises together with the movable cylinder 18 is separated from the second annular body 20 and disengaged from each other.

Since the elastic bellows cylindrical body 22 functions as a tension spring, the third annular body 21 is in the first annular shape when the elastic bellows cylindrical body 22 is raised to an appropriate height by contraction until the elastic bellows cylindrical body 22 is in a no-load state. Although the engagement with the body 19 is maintained, the first annular body 19 rising together with the movable cylinder 18 to a height higher than the height of the third annular body 21 by the elastic bellows cylindrical body 22 in a no-load state is the third annular body 21. And disengage each other.

Thus, the grindstone main body 15 integrated with the swivel base 14 is rotatable around the central shaft 13 with respect to the fixed swivel base 12. When the turntable 14 is made rotatable, the turntable 14 does not need to be lifted.
Of the foreign matter into the guide support portion 12a.

Next, as described above, the swivel base 14 is appropriately rotated so as to be positioned at a predetermined indexing angle position. That is, the wheel head main body 15 slides on the bearing surface of the guide support portion 12a of the turning base 12 lubricated with the lubricating oil supplied from the lubricating oil passage 12b, and the wheel shafts 26, 30 around the turning center P. Both of them rotate by a predetermined indexing angle. By turning the indexing angle, the various grindstones (G1, G2, G3) necessary for the required grinding work are oriented in a predetermined direction with respect to the traverse feed direction as described above.

After the predetermined indexing angle is determined, the lower oil chamber 18 of the movable cylinder 18 is controlled under the control of a switching valve (not shown).
When the pressure oil is supplied from a pressure oil source (not shown) to an oil tank (not shown) through an oil passage 18d to an oil tank (not shown) via an oil passage 18d, the hearth coupling descends together with the movable cylinder 18. The first annular body 19 first engages with the third annular body 21, presses the third annular body 21 downward to extend the elastic bellows tubular body 22, and eventually engages with the second annular body 20. And stop.

Thus, the swivel base 14 is provided with the first annular body 19
And the second annular body 20 and the third annular body 21 are pressed against the support surface of the guide support portion 12a by the tension spring force of the elastic bellows cylindrical body 22, and the rotating base 12 on the fixed side is pressed.
Is positioned and fixed at a predetermined indexing position. That is,
The grindstone main body 15 integrated with the swivel 14 is positioned and fixed at a predetermined indexing position.

Then, the grinding wheel head H is moved on the V slide surface 3 and the flat slide surface 4 on the bed 1 by the ball screw mechanism 2 in the cutting direction (the direction perpendicular to the paper surface in FIG. 2). In combination with the traverse feed of the traverse table 7, the workpiece W is subjected to desired grinding. When tapering the workpiece W, the axis of the workpiece W is inclined by the taper angle with respect to the feed direction of the traverse table 7. In the above-described embodiment, the wheel head of the grinding machine has been described as an example of the tool head of the machine tool. However, it goes without saying that the present invention can be easily applied to the tool head of another machine tool.

[0059]

According to the revolving unit indexing and positioning apparatus of the present invention, since the revolving unit is rotated by a manual operation by an operator, the structure is complicated and the cost is high as in the type in which the revolving unit is operated by power. In addition, the positioning of the predetermined index angle is performed without error, without the trouble of reading the scale of the revolving body by visual inspection of the turning displacement as in the indexing operation of the revolving body by the manual operation of the operator. Moreover, it is convenient for indexing positioning of a plurality of indexing angles. Furthermore, in the indexing and positioning device for a revolving body according to the third aspect, when the posture of the stop member is frequently changed, the operation is easy.

[Brief description of the drawings]

FIG. 1 is a plan view of a grinding machine according to an embodiment of the present invention.

FIG. 2 is a plan view of a grindstone stand of the grinding machine according to the embodiment of the present invention.

FIG. 3 is a front sectional view of a grindstone stand of the grinding machine according to the embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of a lower part of FIG. 3;

FIG. 5 is an enlarged cross-sectional view of a turning base of the grinding wheel stand and an outer peripheral portion of the turning table according to the embodiment of the present invention.

FIG. 6 is a perspective view of a contact member of the grinding wheel head according to the embodiment of the present invention.

FIG. 7 is a perspective view of a first positioning stopper of the grinding wheel head according to the embodiment of the present invention.

FIG. 8 is a perspective view of a second positioning stopper of the grinding wheel head according to the embodiment of the present invention.

FIG. 9 is a perspective view of a first limit stopper of the grinding wheel head according to the embodiment of the present invention.

FIG. 10 shows a second example of the grinding wheel head according to the embodiment of the present invention.
It is a perspective view of a limit stopper.

FIG. 11 is an explanatory diagram (0-degree / 180-degree index positioning) of a contact member, a positioning stopper, and a limit stopper of the grinding wheel head according to the embodiment of the present invention.

FIG. 12 is an explanatory diagram (0 ° / 30 ° index positioning) of a contact member, a positioning stopper, and a limit stopper of the grinding wheel head according to the embodiment of the present invention.

FIG. 13 is an explanatory diagram (30 ° / 180 ° index positioning) of a contact member, a positioning stopper, and a limit stopper of the grinding wheel head according to the embodiment of the present invention.

FIG. 14 is an explanatory diagram of the arrangement of a contact member, a positioning stopper, and a limit stopper of a grinding wheel base (an arbitrary angle index positioning within a limit) according to the embodiment of the present invention;

FIG. 15 is an explanatory diagram showing directions and positions of various grindstones with respect to a workpiece of the grinding machine according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 bed 2 ball screw mechanism 3 V slide surface 4 flat slide surface 5 work headstock 6 tailstock 7 traverse table H grindstone 11 moving base 12 turning base 12a guide support part 12b lubricating oil passage 12c flange part 13 center shaft part 14 Revolving table 14a, 15b Lid 14b Center hole 14c Flange 15 Grindstone main body 16 Space 17 Fixed piston 18 Movable cylinder 18a Flange 18b Upper oil chamber 18c Lower oil chamber 18d, 18e Oil passage 19 First annular body 20 Second Annular body 21 Third annular body 22 Elastic bellows cylindrical body 23 Cylindrical labyrinth member 24 Motor for driving grindstone shaft 25, 28 Pulley 26 Grindstone shaft 27 Belt 29 Bracket 30 Inner surface grindstone shaft 31 Grindstone shaft bearing device 32 For driving grindstone shaft Motor 33 belt-pulley transmission mechanism 40 contact member 40a base 40b Arc-shaped cylindrical body part 40c Bolt hole 40d Step part 40e, 40f End face 50 First positioning stopper 51 Base 52 Upright engaging part 53 Bolt hole 60 Second positioning stopper 61 Base 62 Upright engaging part 63 First concave part 64 Second concave part 65, 68 Bolt hole 66 Holding piece 67 Depression 70 First limit stopper 80 Second limit stopper 71, 81 Base 72, 82 Bolt hole 73, 83 Upright engaging portion 91, 92, 93, 95, 96, 97 Bolt P turning Center A, B, C, D, E (Stopper mounting) Angular position G1 Flat grindstone G2 Angular grindstone G3 Grinding wheel for inner surface grinding W Workpiece

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 10, 1998 (1998.12.
10)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 7

FIG. 2

FIG. 3

FIG. 4

FIG. 5

FIG. 6

FIG. 8

FIG. 9

FIG. 10

FIG. 11

FIG.

FIG. 13

FIG. 14

FIG.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Motoi Ishiyama 1-1-1 Asahi-cho, Kariya-shi, Aichi Pref. Inside Toyota Machine Works Co., Ltd. 3 Toyouchi Co., Ltd. F term (reference) 3C028 EE10 FF04

Claims (3)

[Claims] An indexing and positioning device for a revolving body, comprising: a revolving body rotatably supported on a support body around a revolving center; and a stop member for suppressing the revolving body at a predetermined indexing angle position. The stopping member is selectively provided in a plurality of postures swiveling around the mounting axis, and selectively inhibits and non-inhibits the swiveling of the revolving body according to the revolving posture. apparatus. 2. An indexing and positioning device for a revolving body, comprising: a revolving body rotatably supported on a support body around a revolving center; and a stop member for inhibiting the revolving body from rotating at a predetermined indexing angle position. The stop member is attached to the support by selectively selecting a plurality of postures swiveled around the attachment axis,
An indexing positioning device for a revolving body, characterized in that an engaging portion that can abut on a contact portion of the revolving body is formed eccentrically from a mounting axis on the stop member. 3. An indexing and positioning device for a revolving body, comprising: a revolving body rotatably supported on a support body around a revolving center; and a stop member for inhibiting the revolving body from rotating at a predetermined indexing angle position. The stop member is provided on the support so as to be able to pivot to the first, second and third positions about the mounting axis, and the stop member has a first contact portion and a first contact portion of the revolving body at two positions separated in the pivot direction. An engaging portion capable of contacting the second contact portion is formed eccentrically from the mounting axis, and the engaging portion of the stop member is configured to rotate in one direction in the revolving structure in the first position to make the first contact of the revolving structure. A rotating body in a second position, wherein the rotating body rotates in the other direction and abuts on a second abutting portion of the rotating body, and in a third position, the rotating body does not engage with the abutting portion of the rotating body. Indexing positioning device.