JP6007049B2 - Centerless grinding machine - Google Patents

Description

  The present invention relates to a centerless grinder, and more particularly, to a centerless grinder that performs angular grinding.

  As a conventional angular type centerless grinding machine, for example, a grinding wheel is provided with a conical outer peripheral surface and a conical end surface, and the buses of both are set to be orthogonal, and the orthogonal portions are the cylindrical surface and end surface of the workpiece. There has been proposed a grinding wheel that is inclined by a predetermined angle (angular angle) so as to be in contact with both of them (see, for example, Patent Document 1). In this centerless grinding machine, in the angular grinding stage, the adjusting wheel is retracted in a direction perpendicular to the workpiece axis in conjunction with the cutting operation of the grindstone on the cylindrical surface and end surface of the workpiece (workpiece). It is characterized in that the cutting amount of the workpiece end surface with respect to the cutting amount of the cylindrical surface is variable. Here, in this centerless grinder, the cylindrical surface and the end surface of the work are simultaneously ground by the conical outer peripheral surface and the conical end surface of the grinding wheel by cutting the grinding wheel into the work. In this case, the cutting direction of the grinding wheel is generally set at a right angle to the axle of the grinding wheel. For this reason, the ratio of the cutting depth between the cylindrical surface and the end surface of the workpiece to be ground is determined by the angular angle. Taking the case of a commonly used angular angle of 10 degrees as an example, this ratio is 1: tan 10 degrees, which is about 1: 0.178.

Japanese Patent No. 3635724

  However, in the conventional centerless grinding machine, the amount of cut into the cylindrical surface and end face of the workpiece is determined by the angular angle setting, but the angular angle is about 10 to 15 degrees due to the structural restrictions of the centerless grinding machine. As described above, it is difficult to take a large size, and there is a problem in that the end surface of the workpiece is smaller than the cylindrical surface.

  In centerless grinding, the end face cannot be machined unless the cylindrical surface is machined and the workpiece is rotating. Therefore, if the chamfer on the end face is larger than the amount determined by the angular angle, grinding is difficult. It was.

  However, in the prior art given in Reference 1, in the case of angular grinding, the workpiece wheel is moved backward by a certain amount at a speed slower than the cutting speed of the grindstone in conjunction with the cutting operation of the grindstone. Since the amount of cut into the surface is reduced and the ratio to the amount of cut into the end face is changed, the rotational force of the workpiece due to grinding on the cylindrical surface decreases when the retracting amount of the adjustment wheel increases. There is a problem that grinding on the cylindrical surface becomes unstable.

  Therefore, the present invention has been made paying attention to such problems, and even when angular grinding is performed in a centerless grinding machine, grinding on the cylindrical surface does not become unstable and the cylindrical surface and the end surface of the workpiece are not affected. An object of the present invention is to provide a centerless grinding machine capable of freely setting the ratio of the depth of cut.

To achieve the above object, centerless grinding machine according to the present invention, on the machine base, adjusting a wheel mount for rotating the grinding wheel having a grinding wheel by the grinding wheel rotating motor, a regulating wheel with a regulating wheel a regulating wheel mount for rotating the grinding wheel rotation motor, the regulating wheel and of the predetermined is any intersection of the axle between the one axle inclined with respect to the other axle by a predetermined angular angle the grinding wheel The apex of the angular angle is located on the rotation transmitting portion side where the rotation of the adjusting wheel rotating motor and the grinding wheel rotating motor is transmitted to the adjusting wheel and the grinding wheel in the adjusting wheel and the grinding wheel, respectively. wherein while inclined by a predetermined angular angle and arranged opposite, word on disposed blade that between the regulating wheel mount and the grinding wheel mount to The click, a centerless grinding machine for grinding a cylindrical surface and an end of the workpiece by using the conical outer peripheral surface and the conical end surface adjacent thereto of said grinding wheel,
The cutting direction moving means for moving the cutting direction to the work of the grinding wheel mount and each of the regulating wheel mount with respect to the machine base,
And cross-direction moving means for moving at least one of the grinding wheel mount or the regulating wheel mount in a direction crossing to said cutting direction,
Said the cutting direction moving means in conjunction with said intersecting direction moving means, to set the ratio of the depth of cut for the cylindrical surface and the end face of the workpiece by adjusting the amount of movement of the cutting direction and the cross direction of the grinding wheel relative to the workpiece anda cutting angle control means for controlling the cutting angle of the grinding wheel Te,
A rotary truer is attached to the adjusting wheel between the adjusting wheel and a rotation transmitting portion that is coaxial with the adjusting wheel and transmits the rotation of the adjusting wheel rotating motor, and the cutting direction moving means. wherein by interlocking the intersecting direction moving means and truing to Rukoto the grinding wheel in a shape corresponding to the predetermined angular angle with.
Further, another centerless grinding machine according to the present invention includes a grinding wheel mounting base for rotating a grinding wheel having a grinding wheel by a grinding wheel rotating motor on a machine base, and an adjusting wheel having an adjustment grinding wheel for adjusting the grinding wheel. An adjusting wheel mounting base that is rotated by a motor is tilted at a predetermined angular angle with respect to the other axle by either the adjusting wheel or the grinding wheel, and the predetermined angular angle that is the intersection of the axles. The predetermined position is such that the apex is located on the side of the rotation transmitting portion to which the rotation of the adjusting wheel rotating motor and the grinding wheel rotating motor is transmitted to the adjusting wheel and the grinding wheel in the adjusting wheel and the grinding wheel, respectively. The workpiece on the blade disposed between the grinding wheel mounting base and the adjustment wheel mounting base is arranged to face each other while being inclined by an angular angle of A centerless grinding machine for grinding a cylindrical surface and an end of the workpiece by using the conical outer peripheral surface of the grinding and conical end surface adjacent thereto,
A cutting direction moving means for moving each of the grinding wheel mounting base and the adjustment wheel mounting base in the cutting direction into the workpiece with respect to the machine base;
Crossing direction moving means for moving at least one of the grinding wheel mounting base or the adjustment wheel mounting base in a direction crossing the cutting direction;
By adjusting the cutting direction moving means and the crossing direction moving means to adjust the cutting direction of the grinding wheel relative to the work and the amount of movement in the crossing direction, the ratio of the cutting amount to the cylindrical surface and the end surface of the work is set. Cutting angle control means for controlling the cutting angle of the grinding wheel,
A rotary truer is attached to the grinding wheel between the grinding wheel and a rotation transmitting portion that is coaxial with the grinding wheel and to which the rotation of the grinding wheel rotating motor is transmitted. And the crossing direction moving means are interlocked, and the adjusting grindstone is trued into a shape corresponding to the predetermined angular angle .
Here, the cutting angle control means, cut by setting the cutting direction of the grinding stone to cut angle exceeding the predetermined angular angle to the end face of the workpiece, when that cut at the same angle as the predetermined angular angle Occurs when the grinding wheel is formed by increasing the predetermined angular angle in accordance with the cutting angle exceeding the predetermined angular angle by increasing the ratio of the cutting amount between the cylindrical surface and the end surface with respect to the end surface side. Grinding may be performed without increasing the influence of the peripheral speed difference on the outer peripheral surface of the cone of the grinding wheel on the cylindrical surface of the workpiece.
Moreover, the the moving direction to the grinding wheel mount of the cutting direction by the cutting direction moving means is orthogonal to the moving direction to the grinding wheel mount of the intersecting direction by the intersecting direction moving means, and the with grinding wheel axles are parallel to the moving direction to the grinding wheel mount in the transverse direction, the predetermined angular angle with respect to the direction of movement of the to regulating wheel axles the wheel mount in the transverse direction May be included.
Moreover, the the moving direction to the grinding wheel mount of the cutting direction by the cutting direction moving means is orthogonal to the moving direction to the grinding wheel mount of the intersecting direction by the intersecting direction moving means, and , together with the grinding wheel axle is at a predetermined of said predetermined angular angle with respect to the moving direction to the grinding wheel mount in the transverse direction, the regulating wheel axle of the grinding wheel mount the cross direction It may be parallel to the moving direction.
Further, the moving direction to the grinding wheel mount of the cutting direction by the cutting direction moving means, the predetermined angular angle and movement direction to the grinding wheel mount of the intersecting direction by the intersecting direction moving means form and, and, together with the grinding wheel of the axle is perpendicular to the grinding wheel mounts cutting direction, parallel the adjustment wheel axles and movement direction to the grinding wheel mount in the transverse direction There may be.
In the present invention, the position where the blade is provided is not particularly limited, and may be fixed on the machine base as shown in FIG. 1 to be described later, or on the adjustment vehicle mounting base side, that is, on the adjustment vehicle mounting base or FIG. As shown in the figure, it is provided on the pedestal that moves together with the adjusting wheel mounting base, and the adjusting wheel mounting base moves to the grinding wheel mounting base together with the blade, and the workpiece is pressed against the grinding wheel and ground. May be.

As described above, according to the centerless grinding machine according to the present invention, the cutting direction and the crossing direction of the grinding wheel with respect to the workpiece of the grinding wheel when the angular grinding is performed by interlocking the cutting direction moving unit and the crossing direction moving unit. Since the cutting angle of the grinding wheel is controlled by setting the ratio of the cutting depth to the cylindrical surface and end surface of the workpiece by adjusting the movement amount of the workpiece, grinding on the cylindrical surface is unstable even when performing angular grinding The ratio of the amount of cut with respect to the cylindrical surface and the end surface of the workpiece can be set freely.
In particular, in the centerless grinding machine according to the present invention, either the adjusting wheel or the grinding wheel is tilted with respect to the other axle by a predetermined angular angle, and the apex of the predetermined angular angle, which is the intersection of the axles, is adjusted. The grinding wheel and the grinding wheel in the grinding wheel are respectively placed facing each other while being inclined by a predetermined angular angle so as to be positioned on the rotation transmission part side where the rotation of the grinding wheel rotation motor and the grinding wheel rotation motor is transmitted. The rotary wheel is attached to the adjusting wheel between the adjusting wheel and the rotation transmitting portion that is coaxial with the adjusting wheel and transmits the rotation of the adjusting wheel rotating motor, and moves in the cross direction with the cutting direction moving means. By linking the means, the grinding wheel is trued into a shape corresponding to a predetermined angular angle, or the grinding wheel is coaxial with the grinding wheel, By attaching a rotary truer between the grinding wheel and the rotation transmission part to which the rotation of the grinding wheel rotation motor is transmitted, and by interlocking the cutting direction moving means and the cross direction moving means, the adjusting grindstone has a predetermined angular angle. It is configured to truing into a shape corresponding to.
As a result, according to the centerless grinding machine according to the present invention, not only the cost of the rotary truer can be reduced, but also the outer diameter of the rotary truer can be reduced, and the rotary truer can be reduced in size by rotating the rotary truer. Since the blur becomes smaller and the blur of the rotary truer at the time of rotation also becomes smaller from the point close to the rotation transmitting portion, the adjusting grindstone or the grinding grindstone can be accurately trued .

It is a front view of the centerless grinding machine of the embodiment concerning the present invention. It is a top view of the centerless grinding machine of an embodiment. FIG. 3 is an enlarged plan view of the centerless grinder shown in FIG. 2. (A), (b) is the AA sectional view taken on the line of the grinding wheel in FIG. 3, and the BB sectional view taken on the adjustment wheel, respectively. It is the elements on larger scale of the C section in FIG. It is a simplified top view which shows an example of the truing process of the grinding stone in the centerless grinding machine of embodiment. It is a simplified top view which shows an example of the truing process of the adjustment grindstone in the centerless grinding machine of embodiment. It is a simplified top view which shows the other example of the truing process of the adjustment grindstone in the centerless grinding machine of embodiment. It is a top view which shows the other arrangement | positioning in a centerless grinder. It is a top view which shows the other arrangement | positioning in a centerless grinder. It is a front view which shows the other example in the centerless grinding machine which provided the braid | blade in the adjustment vehicle mounting base side.

  Embodiments 1 to 3 of the centerless grinding machine according to the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 and 2, the centerless grinding machine A includes a pair of grinding wheel mounting base 2 and adjustment wheel mounting base 3 provided on a machine base 1, and this grinding wheel mounting base 2 and adjustment wheel. Grinding wheel 4 and adjusting wheel 5 mounted in a state of being opposed to each of the mounting table 3, a grinding table 6 disposed between the grinding wheel 4 and the adjusting wheel 5, and a work supported by the grinding table 6 And a blade 7 on which the workpiece W is placed.

  In the present embodiment, the grinding wheel 4 and the adjustment wheel 5 are constituted by a so-called shaft-fixed grinding wheel unit. In the grinding wheel 4, as shown in FIG. 4A, a rotating cylinder 10 is fitted on the outer periphery of the grinding wheel shaft 8 via a bearing 9 such as thrust, radial, or slip, and the outer periphery of the rotating cylinder 10 is In this case, a pulley 10a for rotational movement is provided around one end, while a grinding wheel 11 around which a diamond correcting blade 11a is provided is provided at a central portion, and both end portions of the grinding wheel axle 8 are mounted on a mounting base. 2 is fixed and attached to both ends.

  As shown in FIG. 4B, the adjustment wheel 5 is also configured in the same manner as the grinding wheel 4, and the rotating cylinder 14 is disposed on the outer periphery of the adjustment wheel 12 via a bearing 13 such as last, radial, or slip. A pulley 14a for rotational movement is provided around one end of the rotating cylinder 14, and an adjusting grindstone 15 is provided around the central portion. Further, in this adjusting wheel 5, a disk-shaped rotary rotary luer 16 around which the diamond correction blade 16 a is provided is located near the other end of the rotating cylinder 14 so that there is a gap coaxially with the adjusting grindstone 15. The both ends of the adjustment axle 12 are fixedly attached to the mounting base 3 in a supported manner.

  Each of the grinding wheel mounting base 2 and the adjustment wheel mounting base 3 includes a pair of support parts 17, 17. Each of the support parts 17, 17 has a receiving side 17 a having an upward semicircle receiving part and a downward semicircle receiving part. The two ends of the grinding wheel axle 8 of the grinding wheel 4 and the axle shaft 12 of the adjustment wheel 5 are sandwiched by the semicircular receiving portions of the support portions 17 and 17 from the diameter direction. In this state, the bolts 18 are fastened and fixed in a doubly supported manner.

Each of the grinding wheel 4 and the adjusting wheel 5 includes a grinding wheel rotating motor 19 disposed on each of the pulley portions 10a and 14a of the rotary cylinders 10 and 14, the grinding wheel mounting base 2 and the adjusting wheel mounting base 3, respectively. And the grinding wheel rotating motor 19 and the adjusting wheel rotating motor 20 are rotated by belts 21 and 21 suspended between pulleys 19a and 20a of the adjusting wheel rotating motor 20. Each of the wheel 4 and the adjusting wheel 5 can be easily removed from the grinding wheel mounting base 2 and the adjusting wheel mounting base 3 by loosening the bolts (not shown) of the support portions 17 and 17 and removing the belts 21 and 21. Can be removed.

The grinding wheel mounting base 2 is configured so that the grinding wheel 4 is turned into the grinding wheel axle 8 during grinding by a drive motor 22a which is a cutting direction moving means on the grinding wheel 4 side and a screw shaft (ball screw) 23a which is rotated by the driving motor 22a. The grinding wheel 4 is attached to the grinding wheel by a drive motor 24 which is a crossing direction moving means on the grinding wheel 4 side and a screw shaft 25 which is rotated by the driving motor 24 while moving the workpiece W in the perpendicular cutting direction. The stage 2 is configured to move parallel to the axis of the grinding wheel axle 8. In the description of the present embodiment, the cutting direction moving means and the crossing direction moving means have been described as moving means using the drive motors 22a, 24 and the screw shafts 23a, 25. However, the present invention is not limited to this, and linear motors, etc. Of course, the moving means may be used.

On the other hand, the adjustment vehicle mounting base 3 is orthogonal to the adjustment axle 12 during grinding by a drive motor 22b which is a cutting direction moving means on the adjustment vehicle 5 side and a screw shaft 23b which is rotated by the drive motor 22b. The workpiece W is cut by moving in the cutting direction. In the example shown in FIGS. 1 to 10, a cutting direction moving means including a drive motor 22 a and a screw shaft 23 a and a cross direction moving means including a drive motor 24 and a screw shaft 25 are provided on the grinding wheel 4 side. In order to explain that angular grinding is performed by interlocking the cutting direction moving means and the crossing direction moving means on the grinding wheel 4 side with a cutting angle control means (not shown), the drive motor 22b or The moving means including the screw shaft 23b and the drive motor 24a and the screw shaft 25a shown in FIGS. 6 to 8 are unnecessary and may be omitted, and the adjustment vehicle mounting base 3 may be fixed on the machine base 1. .

In the centerless grinding machine A, the workpiece W is placed on the blade 7, and the grinding wheel rotating motor 19 and the adjusting wheel rotating motor 20 of each of the grinding wheel mounting base 2 and the adjusting wheel mounting base 3 are connected to the belt. The grinding wheel 4 and the adjustment wheel 5 are rotated through 21 and 21, and the grinding wheel mounting base 2 and the adjustment wheel mounting base 3 are linked to the cutting direction by screw shafts 23a and 23b rotated by drive motors 22a and 22b. The peripheral surface of the workpiece W is sharpened by the rotational grinding force of the grinding wheel 11 in the grinding wheel 4 while being moved.

The grinding wheel rotating motor 19 and the adjusting wheel rotating motor 20 for rotating the grinding wheel 11 and the adjusting wheel 15 are controlled by a grinding wheel rotation control means such as an NC control unit or a programmable controller (not shown). The drive motors 22a, 22b, and 24 for moving the grinding wheel mounting base 2 and the adjustment wheel mounting base 3 are controlled by a cutting angle control means such as an NC control unit (not shown). What are the grinding wheel rotation control means and the cutting angle control means? One NC control unit or the like may be controlled.

Here, in the centerless grinding machine A of the present embodiment, as shown in FIGS. 2, 3, and 5, the movement direction of the grinding wheel mounting base 2 by the drive motor 22 a and the screw shaft 23 a in the cutting direction, and the drive motor 24 and the screw shaft 25 are orthogonal to the direction of movement of the grinding wheel mounting base 2 in the crossing direction , and the grinding wheel axle 8 of the grinding wheel 4 is parallel to the direction of movement of the grinding wheel mounting base 2 in the crossing direction . The adjusting axle 12 of the adjusting wheel 3 forms a predetermined angular angle α with respect to the moving direction of the grinding wheel mounting base 2 in the intersecting direction, that is, the direction of the grinding wheel shaft 8 of the grinding wheel 4.

<Angular grinding operation>
Next, in the centerless grinding machine A of the present embodiment, when angular grinding is performed by a cutting angle control means (not shown), the driving motor 22a and the driving motor 24 are interlocked to cut the grinding wheel 11 into the workpiece W. By adjusting the amount of movement in the direction intersecting with the direction , the ratio of the amount of cut with respect to the cylindrical surface W1 (see FIG. 5) and the end surface W2 (see FIG. 5) of the workpiece W is set, and the cutting angle of the grinding wheel 11 is set. Control.

  At that time, in the centerless grinding machine A of the present embodiment, the cutting angle control means sets the cutting direction of the grindstone to a cutting angle that exceeds the angular angle α with respect to the end surface of the workpiece, for example, and is the same as the angular angle α. By increasing the ratio of the cut amount of the cylindrical surface W1 and the end surface W2 with respect to the end surface side when cutting at an angle, the angular angle α is increased in accordance with the cut angle exceeding the angular angle α, and the grinding wheel 11 is made. Grinding can be performed without increasing the influence of the peripheral speed difference between the upper end portion and the lower end portion of the conical outer peripheral surface 11a1 of the grinding wheel on the cylindrical surface W1 of the workpiece W, which can occur when forming. Thereby, in the centerless grinding machine A of the present embodiment, the cylindrical surface W1 of the workpiece W can be ground without making the grinding of the cylindrical surface W1 of the workpiece W unstable even when the angular grinding is performed.

In the centerless grinder A, the angular angle α can usually be taken only from 10 degrees to 20 degrees due to the construction of the machine. However, like the centerless grinder A, the cutting direction of the grinding wheel mounting base 2 by the cutting direction moving means including the driving motor 22a and the screw shaft 23a and the cross direction moving means including the driving motor 24 and the screw shaft 25, etc. The moving direction of the grinding wheel mounting base 2 by the crossing direction is orthogonal to the crossing direction , and the cutting angle control means moves the cutting direction by the cutting direction moving means and the moving direction of the grinding wheel mounting base 2 by the crossing direction moving means in the crossing direction . In the case of performing two-axis control interlocking in both directions, the angle can be increased up to a cutting angle of 45 degrees where the ratio of the cutting amount between the cylindrical surface W1 and the end surface W2 of the workpiece W is 1: 1. As shown in FIG. 5, the cutting angle can be arbitrarily set to, even if the angle formed by the conical outer peripheral surface 11a1 and the conical end surface 11a2 of the grinding wheel 11 is not changed. It can be cut to the click W.

  Therefore, according to the centerless grinding machine A of the present embodiment, a grindstone that forms an angle formed by the conical outer peripheral surface 11a1 and the conical end surface 11a2 of the grinding grindstone 11 that is normally required for a notch that matches the angular angle α. Molding can be eliminated. That is, even if the angular angle α increases, it is not necessary to form a grindstone to reduce the tip angle of the conical outer peripheral surface 11a1 of the grinding wheel 11, that is, the angle formed between the conical outer peripheral surface 11a1 and the conical end surface 11a2.

  Therefore, it is not necessary to form a grindstone to reduce the angle formed between the conical outer peripheral surface 11a1 and the conical end surface 11a2 of the grinding wheel 11, and therefore the upper end portion of the conical outer peripheral surface 11a1 when the grinding wheel 11 rotates with respect to the cylindrical surface W1 of the workpiece W And the difference in peripheral speed between the lower end portions can be prevented. As a result, if the peripheral speed difference between the upper end portion and the lower end portion of the conical outer peripheral surface 11a1 of the grinding wheel 11 becomes large, the grinding process becomes unstable and the wear of the grinding wheel becomes non-uniform, and the life between the dresses of the grinding wheel 11 is short. However, according to the centerless grinding machine A of the present embodiment, the peripheral speed difference between the upper end and the lower end of the cone outer peripheral surface 11a1 of the grinding wheel 11 with respect to the cylindrical surface W1 of the workpiece W is increased. It is possible to prevent, stabilize the grinding process, make the wear of the grinding wheel uniform, and extend the interdressing life of the grinding wheel 11.

<True processing>
Next, the truing process in the centerless grinding machine A of this embodiment will be described.

  In the centerless grinding machine A of this embodiment, the truing process for correcting the surface state and shape of the grinding wheel 11 of the grinding wheel 4 and the adjustment grinding wheel 15 of the adjustment wheel 5 is mounted on the adjustment wheel 5 on the adjustment wheel mounting base 3 side. This is done with a rotary trule 16.

That is, in the centerless grinding machine A of the present embodiment, the rotary wheel 16 is mounted on the adjustment wheel 5 coaxially with the adjustment wheel 15, so that the grinding wheel 11 used for grinding the workpiece W is moved in the cutting direction. The grinding wheel 11 can be arbitrarily angular by linking the cutting direction moving means composed of the drive motor 22a and the screw shaft 23a to be moved with the cross direction moving means composed of the drive motor 24 and the screw shaft 25 moved in the cross direction. Truing to a shape corresponding to the angle α.

Specifically, it moves the grinding wheel 11 in the direction of the rotary tool lure 16 from the regulating wheel 15 by the intersection direction moving means comprising a driving motor 24 Yaneji shaft 25 and the like to move in the transverse direction, the drive motor 22a Yaneji shaft The grinding wheel 11 is moved in the direction of the rotary truer 16 by the cutting direction moving means composed of 23a or the like, and the grinding wheel 11 is trued by the rotary tool 16 as shown in FIG. Arrange. The truing process (reshape) may include a dressing process (reshape).

Therefore, in the centerless grinding machine A of the present embodiment, the cutting direction moving means including the driving motor 22a and the screw shaft 23a for moving the grinding wheel 11 in the cutting direction, the driving motor 24 and the screw shaft 25 for moving in the intersecting direction , and the like. When the grinding wheel 11 is trued into a shape corresponding to an arbitrary angular angle α by interlocking with the cross direction moving means consisting of truing at a position where the blade 7 does not interfere with the rotary truer 16 during the truing process. Processing can be performed, and truing processing is facilitated.

Further, as shown in FIG. 7, the dressing process of the adjusting wheel 15 in the adjusting wheel 5 is performed by moving in the crossing direction with a cutting direction moving means including a drive motor 22a and a screw shaft 23a that move the grinding wheel 11 in the cutting direction. by interlocking the intersecting direction moving means comprising a driving motor 24 Yaneji shaft 25 and the like which, as shown in FIG. 7, by contacting the grinding wheel 11 to the regulating wheel 15, adjusted by the grinding wheel 11 of the grinding wheel 4 A dressing process is performed on the grindstone 15. In addition, as shown in FIG. 7, the grinding wheel 4 is ground in a mode in which the crossing direction moving means by the drive motor 24 a and the screw shaft 25 a is arranged on the adjustment wheel mounting base 3 on the adjustment wheel 5 side. A means for dressing the grinding wheel 11 and the adjustment grindstone 15 by controlling and moving the adjustment wheel mounting base 3 with respect to the grindstone 11, and a cutting direction moving means for both the grinding wheel mounting base 2 and the adjustment wheel mounting base 3; There is also means for using cross direction moving means together.

Further, as shown in FIG. 8, similarly to the configuration of the adjustment wheel 5, a rotary truer 16 ′ is arranged in parallel to the rotary cylinder 10 in the grinding wheel 4 in a state coaxial with the grinding wheel 11 and at a predetermined interval. The grinding wheel 4 of the grinding wheel 4 is fixed by interlocking the cutting direction moving means composed of the drive motor 22a and the screw shaft 23a with the cross direction moving means composed of the drive motor 24 and the screw shaft 25 moved in the cross direction . You may make it dress the adjustment grindstone 15 of the adjustment wheel 5 by moving rotary truer 16 '. This is suitable when the peripheral surface of the grinding wheel 11 is stepped or the like and it is difficult to use the grinding wheel 11 as a dresser. In addition, the adjusting grindstone 15 is configured so that a bite type dressing tool (not shown) attached to the grinding wheel side grinding wheel mounting base 2 and a cutting direction moving means composed of a drive motor 22a, a screw shaft 23a, and the like are crossed . There is also a means for dressing by moving it toward the adjusting grindstone 15 by interlocking with a cross direction moving means consisting of a drive motor 24 to be moved, a screw shaft 25 and the like.

  The grinding wheel 4 and the adjustment wheel 5 in this embodiment are so-called fixed shaft type grinding wheel units as described above, but of course the same applies to the axial rotation type grinding wheel unit.

In the centerless grinding machine A of this embodiment, as shown in FIGS. 2, 3, and 5, the driving motor 22 a and the screw shaft 23 a move in the cutting direction of the grinding wheel mounting base 2 and the driving motor 24. And the direction of movement of the grinding wheel mounting base 2 by the screw shaft 25 in the crossing direction is orthogonal to the grinding wheel axle 8 of the grinding wheel 4 and parallel to the direction of movement of the grinding wheel mounting base 2 in the crossing direction . The adjustment axle 12 of the adjustment wheel 3 is disposed so as to form a predetermined angular angle α with respect to the direction of movement of the grinding wheel mounting base 2 in the intersecting direction , that is, the direction of the grinding wheel axle 8 of the grinding wheel 4. In the present invention, the present invention is not limited to this, and a centerless grinding machine B shown in FIG. 9 or a centerless grinding machine C shown in FIG.

That is, in the centerless grinding machine B shown in FIG. 9, the moving direction in the cutting direction of the grinding wheel mounting base 2 by the cutting direction moving means including the driving motor 22a and the screw shaft 23a, and the driving motor 24 and the screw shaft 25 are used. The moving direction of the grinding wheel mounting base 2 in the crossing direction by the crossing direction moving means is orthogonal to each other, and the grinding wheel axle 8 of the grinding wheel 4 is predetermined with respect to the moving direction of the grinding wheel mounting base 2 in the crossing direction . And the adjustment axle 12 of the adjustment wheel 5 is parallel to the direction of movement of the grinding wheel mounting base 2 in the crossing direction , that is, perpendicular to the cutting direction of the grinding wheel mounting base 2. Arrange.

Further, in the centerless grinding machine C shown in FIG. 10, the moving direction of the grinding wheel mounting base 2 in the cutting direction by the cutting direction moving means including the driving motor 22a and the screw shaft 23a, and the driving motor 24 and the screw shaft 25 are used. The moving direction of the grinding wheel mounting base 2 in the crossing direction by the crossing direction moving means is a predetermined angular angle α, and the grinding wheel axle 8 of the grinding wheel 4 is in the cutting direction of the grinding wheel mounting base 2. The adjustment wheel 5 is arranged so that the adjustment axle 12 of the adjustment wheel 5 is parallel to the moving direction of the grinding wheel mounting base 2 in the crossing direction .

In the description of the present embodiment, the blade 6 is described as being fixed on the machine base 1 via the grinding table 6 as shown in FIG. 1, but the present invention is not limited to this, for example, FIG. As shown in Fig. 4, the adjusting vehicle mounting base 3 or the base that moves together with the adjusting vehicle mounting base 3 is provided via the grinding table 6, and intersects with the cutting direction moving means comprising the drive motor 22b and the screw shaft 23b. The adjustment wheel mounting base 3 is moved toward the grinding wheel mounting base 2 together with the blade 6 by interlocking with the cross direction moving means including the drive motor 24a, the screw shaft 25a, etc., which move in the direction, and the workpiece W is moved to the grinding wheel. Of course, it may be configured so as to be angularly ground by being pressed against the surface 11. In this case, as shown in FIG. 11, the drive motor 22a and the screw shaft 23a, the drive motor 24 and the screw shaft 25 may be omitted, and the grinding wheel mounting base 2 may be fixed so as not to move onto the machine base 1. However, as shown in FIGS. 1 to 10 described above, the drive motor 22a and the screw shaft 23a, and the drive motor 24 and the screw shaft 25 may be left so that they are not operated during the angular grinding.

A, B, C: Centerless grinding machine W ... Work 1 ... Machine base 2 ... Grinding wheel mounting base 3 ... Adjustment wheel mounting base 4 ... Grinding wheel 5 ... Adjustment wheel 6 ... Grinding base 7 ... Blade 8 ... Grinding wheel axle 10a ... Pulley Part (rotation transmission part)
14a ... pulley section (rotation transmission section)
DESCRIPTION OF SYMBOLS 11 ... Grinding wheel 12 ... Adjustment axle 15 ... Adjustment wheel 16, 16 ' ... Rotary truer 17 ... Support part
19 ... Grinding wheel rotation motor
20 ... Adjustment wheel rotating motor
21 ... belt 22a ... drive motor (cutting direction moving means)
22b ... Drive motor (cutting direction moving means)
23a ... Screw shaft (cutting direction moving means)
23b ... Screw shaft ( cutting direction moving means )
24 ... Drive motor ( crossing direction moving means)
24a ... Drive motor ( cross direction moving means)
25 ... Screw shaft ( cross direction moving means)
25a ... Screw shaft ( cross direction moving means)

Claims (6)

On the machine base, a grinding wheel mount for rotating the grinding wheel having a grinding wheel by the grinding wheel rotating motor, and a regulating wheel mount for rotating the regulating wheel rotating motor the adjustment wheel with a regulating wheel, the adjustment the adjustment drive or vertices of the predetermined angular angle which is an intersection of the axle between the one axle inclined with respect to the other axle by a predetermined angular angle of the grinding wheel in the grinding wheel respectively and the regulating wheel oppositely disposed while inclined at the predetermined angular angle as the rotation of the relative grinding wheel and the grinding wheel and the regulating wheel rotating motor the grinding wheel rotating motor is located in the rotation transmission portion to be transmitted, the the workpiece on disposed blade that between the grinding wheel mount and the adjustment wheel mount, the conical outer circumferential surface and the conical end surface adjacent thereto of said grinding wheel A centerless grinding machine for grinding a cylindrical surface and an end of the workpiece using a
The cutting direction moving means for moving the cutting direction to the work of the grinding wheel mount and each of the regulating wheel mount with respect to the machine base,
And cross-direction moving means for moving at least one of the grinding wheel mount or the regulating wheel mount in a direction crossing to said cutting direction,
Said the cutting direction moving means in conjunction with said intersecting direction moving means, to set the ratio of the depth of cut for the cylindrical surface and the end face of the workpiece by adjusting the amount of movement of the cutting direction and the cross direction of the grinding wheel relative to the workpiece anda cutting angle control means for controlling the cutting angle of the grinding wheel Te,
A rotary truer is attached to the adjusting wheel between the adjusting wheel and a rotation transmitting portion that is coaxial with the adjusting wheel and transmits the rotation of the adjusting wheel rotating motor, and the cutting direction moving means. wherein by interlocking the intersecting direction moving means, centerless grinding machine, characterized in truing to Rukoto the grinding wheel in a shape corresponding to the predetermined angular angle with. The adjustment of the grinding wheel mounting base for rotating the grinding wheel having the grinding wheel by the grinding wheel rotating motor and the adjusting wheel mounting base for rotating the adjusting wheel having the adjusting grinding wheel by the adjustment wheel rotating motor on the machine base. Either the wheel or the grinding wheel is tilted by a predetermined angular angle with respect to the other axle, and the apex of the predetermined angular angle that is the intersection of the axles is the adjustment in each of the adjusting wheel and the grinding wheel. Positioning the grinding wheel and the grinding wheel opposite to each other while tilting the predetermined angular angle so as to be positioned on the rotation transmission portion side to which the rotation of the adjusting wheel rotating motor and the grinding wheel rotating motor is transmitted, A workpiece on a blade disposed between the grinding wheel mounting base and the adjusting wheel mounting base is formed by connecting a cone outer peripheral surface of the grinding wheel and a conical end surface adjacent thereto. A centerless grinding machine for grinding a cylindrical surface and an end of the workpiece using a
A cutting direction moving means for moving each of the grinding wheel mounting base and the adjustment wheel mounting base in the cutting direction into the workpiece with respect to the machine base;
Crossing direction moving means for moving at least one of the grinding wheel mounting base or the adjustment wheel mounting base in a direction crossing the cutting direction;
By adjusting the cutting direction moving means and the crossing direction moving means to adjust the cutting direction of the grinding wheel relative to the work and the amount of movement in the crossing direction, the ratio of the cutting amount to the cylindrical surface and the end surface of the work is set. Cutting angle control means for controlling the cutting angle of the grinding wheel,
A rotary truer is attached to the grinding wheel between the grinding wheel and a rotation transmitting portion that is coaxial with the grinding wheel and to which the rotation of the grinding wheel rotating motor is transmitted. A centerless grinding machine characterized in that the adjusting grindstone is trued into a shape corresponding to the predetermined angular angle by interlocking the crossing direction moving means . In the centerless grinding machine according to claim 1 or 2,
The cutting angle control means, the cylindrical surface of the notch is set to cut angle exceeding the predetermined angular angle cutting direction with respect to the end face of the work of the grinding wheel, if that cut at the same angle as the predetermined angular angle and Workpiece that may occur when the grinding wheel is formed by increasing the predetermined angular angle in accordance with the cutting angle exceeding the predetermined angular angle by increasing the ratio of the cutting amount with the end surface with respect to the end surface side. A centerless grinding machine characterized in that grinding is performed without increasing the influence of the peripheral speed difference on the outer peripheral surface of the cone of the grinding wheel on the cylindrical surface of the grinding wheel. In the centerless grinding machine according to any one of claims 1 to 3,
Wherein the moving direction to the grinding wheel mount of the cutting direction by the cutting direction moving means is orthogonal to the moving direction to the cross direction of the grinding wheel mount by the intersecting direction moving means, and said with grinding wheel axles are parallel to the moving direction to the grinding wheel mount in the transverse direction, the adjustment wheel of the axle is the predetermined angular angle with respect to the moving direction to the grinding wheel mount in the transverse direction A centerless grinding machine characterized by In the centerless grinding machine according to any one of claims 1 to 3,
Wherein the moving direction to the grinding wheel mount of the cutting direction by the cutting direction moving means is orthogonal to the moving direction to the cross direction of the grinding wheel mount by the intersecting direction moving means, and said with grinding wheel axle is at a predetermined of said predetermined angular angle with respect to the moving direction to the grinding wheel mount in the transverse direction, moving the regulating wheel axle to the grinding wheel mount in the transverse direction A centerless grinder characterized by being parallel to the direction. In the centerless grinding machine according to any one of claims 1 to 3,
The moving direction to the grinding wheel mount of the cutting direction by the cutting direction moving means, the moving direction to the grinding wheel mount of the intersecting direction by the intersecting direction moving means forms a predetermined angular angle and, and, said grinding wheel axles with are perpendicular with respect to the grinding wheel mounts cutting direction, the adjustment wheel of the axle is parallel to the moving direction to the grinding wheel mount in the transverse direction A centerless grinding machine featuring

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