JPS5834258B2 - Copying wheel correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a profiling grindstone correction device for correcting a grindstone having a straight portion and arcuate portions at both ends thereof by template copying using a low-crit diamond roll. This invention relates to a device that includes a concavely curved arc correction surface having a radius larger than the radius of the grinding wheel, and performs tracing correction by inscribing the arc portion of the grindstone with the arc correction surface.

The main object of the present invention is to provide an arc-inscribed profiling grindstone correction device that has a long contact arc between the grindstone and the diamond roll, thereby reducing the load on the grindstone and improving surface roughness. That's true.

Conventionally, a grinding wheel 10 consisting of a straight line part and an arc part as shown in FIG. A diamond roll is rotatably supported around an axis perpendicular to the grinding wheel axis, and by moving this diamond roll according to a template, its outer periphery circumscribes the grinding wheel arc and corrects it.

In this type of profile correction using a diamond roll, the correction speed does not increase excessively when the arc part of the grinding wheel is corrected. Although there are advantages that do not necessarily require deceleration,
Since the contact between the diamond roll and the grinding wheel is in a circumscribed relationship as described above, the length of the contact arc is short,
Therefore, there was a problem in that it was not possible to expect an improvement in the surface roughness of the arc portion of the grindstone.

The present invention was made in view of such conventional problems, and
The gist is to provide a profiling grinding wheel correction device in which the arc correction surface of a diamond roll for correcting the arc portion of the grindstone is a concave curved surface and has a radius larger than the radius of the arc portion of the grindstone. It is.

Embodiments of the present invention will be described above based on the drawings.

In FIGS. 1 and 2, reference numeral 10 denotes a grindstone that is rotatably supported on a circuit's grindstone head. The grinding surface of this grindstone 10 has a straight section S and circular arc sections CI, C2 (with radius r1) at both ends thereof.
(see Figure 3) is formed.

A pace 11 is installed on the grindstone head, and a cutting slide 12 is slidably mounted on this base 11.

A traverse table 13 is mounted on the cutting slide 12 so as to be slidable in the grinding wheel axis direction, and a traverse cylinder 14
The traverse motion is given by.

A ram 15 is slidably inserted into the traverse table 13 in a direction perpendicular to the axis of the grinding wheel, and this ram 15 is constantly applied with a constant pressure by a pressing cylinder 17 via a plate 16 integrally attached to the upper end of the ram 15. It is pressed toward the grindstone 10.

A roll support 18 is fixed to the tip of the ram 15, and a roll diamond roll 20 driven by a rotary motor 19 is rotatably supported on this support 18 around an axis parallel to the grinding wheel axis. There is.

On the correction surface of the diamond roll 20, as shown in an enlarged view in FIG. 3, a linear correction surface 21 for correcting the straight portion S of the grinding wheel 10 is formed at the center in the axial direction,
Also, the arcuate portions C of the grinding wheel 10 are located at both ends of this straight line correction surface 21.
1. Arc-shaped correction surface 22 for correcting C2 respectively.
．． 23 is formed.

The arc correction surfaces 22 and 23 have a concave curved shape in which the roll diameter gradually decreases from both ends of the linear correction surface 21, and the arc radius r2 thereof is set to be sufficiently larger than the radius r1 of the grindstone arc portions CI and C2. There is.

As a result, the arc correction surface 22 of the diamond roll 20.
23, the grindstone circular arc portions CI and C2 are corrected so as to be inscribed therein.

Note that each boundary between the linear correction surface 21 and the arc correction surface 22, 23 of the diamond roll 20 is cut out so as not to contact the whetstone arc portions C1 and C2 when the diamond roll 20 is moved according to a template to be described later. It's dark.

A template 25 having a profiling surface matching the shape of the grindstone to be corrected is fixed to the cutting slide 12, and a stylus 26 that comes into contact with the template 25 is fixed to the plate 16 of the ram 15.

The stylus 26 has a shape that matches the shape of the modified surface of the diamond roll 20, and is pressed into contact with the template 25 by the action of the pressing cylinder 17 with a constant contact pressure.

Thus, the stylus 26 is moved along the template 25 by the traverse motion of the driver table 13 by the traverse cylinder 14, and the stylus 26 is moved along the template 25.
The circular/arc correction surface 22, the straight line correction surface 21, and the circular arc correction surface 23 sequentially correct the arc portion C1, straight portion S, and arc portion C2 of the grindstone 10.

In particular, when modifying the arc portion CLC2, use the arc correction surface 22.2.
3, and such an internal connection can maintain a large contact arc length between the diamond roll 20 and the grinding wheel 10, and as a result, it is possible to maintain a large contact arc length between the diamond roll 20 and the grinding wheel 10, and as a result, the diamond Many diamond grains of the roll 20 can be applied, thereby reducing the load on the grinding wheel 10 and improving the surface roughness.

Note that the shapes of the template 25 and the stylus 26 are not limited to those that match the shapes of the grinding wheel 10 and the diamond roll 20 as described above;
Template 27 and squirrel 2 shaped as shown in the figure
8 can also give the diamond roll 20 a tracing motion along the same trajectory.

Next, the operation of correcting the straight line part S and the circular arc part CLC2 of the grinding wheel 10 by the profiling grinding wheel correction device configured as described above will be explained. Normally, the traverse table 13 is positioned at the left end as shown in FIG. Stylus 26
is in contact engagement with the bottom surface of the end of the template 25, thereby holding the diamond roll 20 at a position slightly spaced apart from the grindstone 10.

In this state, when the traverse table 13 is traversed rightward at a constant speed (Uo) by the traverse cylinder 14, the stylus 26 moves toward the template 2.
5, and the diamond roll 20 is given a tracing motion according to the template shape.

As a result, one arc correction surface 22 of the diamond roll 20 is brought into contact with one arc part C1 of the grindstone 10, and the contact (correction) point is in the axial direction of the diamond roll 20, as is clear from FIGS. 3A and 3B. As the displacement increases, the grinding wheel 1
0 to the circular arc end connected to the side surface of the grindstone 10.

Such repair of the arc portion C1 is performed by a concave curved arc correction surface 2.
2, the contact arc length L between the arc correction surface 22 and the arc portion C1 is, as is clear from FIG. 1 (FIG. 6B), and as a result, many diamond grains are simultaneously applied to correct the circular arc, and as a result, the surface roughness of the circular arc portion C1 can be greatly improved.

In this way, the grinding wheel arc portion C1 is connected to the diamond roll 2.
Correction is made by template copying by the circular arc correction surface 22 of 0, but the correction speed U is r1''U0--[However, r
I LL circle 'X part U: (r 2 - r 1 ) cos
The radius of OCl, r2 is the radius of the arc correction surface 22, UO is the traverse speed, and θ is the correction point angle of the arc portion C1).

That is, by increasing the ratio of the radius r1 of the circular arc portion C1 to the radius r2 of the circular arc correction portion 22, the correction speed U in the circular arc portion C1 can be effectively reduced, and from this point as well, the surface roughness of the circular arc portion C1 can be improved. can.

When the repair of the grindstone circular arc portion C1 is completed, the straight line portion S of the grindstone 10 is subsequently corrected by the straight line correction surface 21 of the diamond roll 20 as shown in FIG. The other arc portion C2 of the grindstone 10 is corrected sequentially from the arc end side connected to the side surface of the grindstone 10 by the arc correction surface 23 .

FIG. 5 shows a correction speed diagram when the arc radius r1 of the grindstone 10 and the arc radius r2 of the diamond roll 20 are set at a ratio of 1=5, and the correction order is as clear from the above explanation b-) a.

b→c, c-+d.

In this way, the diamond roll 20 modifies the grindstone 10 into a predetermined shape by copying the template, and when the traverse table 13 reaches the right end, this is confirmed by the open limit switch, and based on this confirmation signal, the pressure of the pressing sill 17 is The oil supply and discharge are switched, and the ram 15
is retracted to the retraction end.

Subsequently, the traverse table 13 is traversed to the left end, and then the ram 15 is moved forward again to return to the original position shown in FIG.

FIG. 7 shows another embodiment of the present invention, in which the shape of the diamond roll is changed.

That is, the diamond roll of this embodiment has a grindstone 10
A diamond roll 31 and a grindstone 1 for correcting the straight line part of the
each diamond roll 32 for correcting the arcuate portions at both ends of 0;
The diamond rolls 32 and 33 for correcting the circular arc portion of the grinding wheel are arranged at intervals on both sides of the diamond roll 31 for correcting the straight portion of the grinding wheel.

Therefore, the diamond rolls 32 and 33 at both ends have arc correction surfaces 34 and 35 that have a concave curved shape in which the roll diameter gradually decreases toward the center diamond roll 31 and have a radius larger than the radius of the grinding wheel's arc portion. each formed.

By moving the diamond roll assembly 31, 32° 33 together with the stylus 37 that follows the template 36, the straight portion S and the arcuate portions CI, C2 of the grindstone 10 can be corrected in the same manner as described above, and the correction can be carried out. In FIG. 5, the order is d→c, b-)c, b-)a.

As is clear from the above description, the profiling grinding wheel correction device of the present invention has a concave arc correction portion having a radius larger than the radius of the arc portion of the grinding wheel on a diamond roll rotatably supported in parallel with the grinding wheel axis. Since the arc part of the grinding wheel is inscribed in this arc correction part and the grinding wheel is traced and corrected, the arc of contact between the diamond roll and the grinding wheel is extremely long compared to the conventional circumscribed type. This has the characteristic that the surface roughness of the grinding wheel's arc portion can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a front view of a profiling grindstone correction device showing an embodiment of the present invention, Fig. 2 is a schematic sectional view taken along the line n-I of Fig. 1, and Fig. 3 is the correspondence between the diamond roll and the grindstone, and the stylus and template. Fig. 4 is a diagram showing the stylus and template before different implementations, Fig. 5 is a diagram showing the corrected speed diagram, and Fig. 6 is the contact arc length between inscribed type copying and circumscribed type copying. FIG. 7 is a diagram showing another embodiment of the present invention. 10... Grinding wheel, S... Straight section, C1,
C2... Arc part, 20... Diamond roll, 22° 23... Arc correction surface, 25.
...Template, 26...Squillus.

Claims (1)

[Claims] 1 In a copying grinding wheel correction device in which a rotary diamond roll is moved according to a template to correct the straight and circular parts of the grinding wheel, the diamond roll is rotatably supported in parallel with the axis of the grinding wheel, and the diamond roll is attached to the grinding wheel. A profiling grindstone correction device provided with a concave arc correction surface that has a radius larger than the radius of the arc portion and inscribes and corrects the arc portion of the grindstone.