JP2007050456A - Angular grinding method and device therefor in centerless grinding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform a high precision angular grinding at high efficiency and low cost by improving an angular grinding technique in a centerless grinding machine, and without requiring special skills and considerable labor. <P>SOLUTION: An auxiliary axis Θ or the auxiliary axis Φ is assumed in the horizontal rectangular coordinates X-Z. A diagonal slide 16 in the auxiliary axis Θ direction is provided to mount a grinding wheel 4 as an example (A). Alternatively, the diagonal slide 17 in the auxiliary axis Φ direction is provided to mount an adjusting wheel 2 and a blade 1 as an example (B). The grinding wheel does not require a special shape for an angular grinding and requires a standard shape (cylindrical shape) which is good enough. When the diagonal slide 16 is operated and the grinding wheel 4 is fed in the arrow d direction, the corner 3c of a workpiece 3 is ground. Alternatively, even when the diagonal slide 17 is operated and the adjusting wheel 2 and the blade 1 are fed in the arrow e direction, the corner 3c is also ground. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to angular grinding in a centerless grinding machine. In other words, the angular grinding according to the prior art has been improved to eliminate the need for using a specially shaped grinding wheel, and to enable highly accurate angular grinding with high efficiency and low cost.

2A and 2B are views for explaining standard centerless grinding. FIG. 2A is a schematic plan view, and FIG. 2B is a schematic front view.
The basics of centerless grinding are that the grinding wheel 4 that is a grinding wheel is brought into contact with the workpiece while the cylindrical workpiece 3 is supported and rotated by the adjusting wheel 2 that is a grinding wheel and the blade 1 that is a stationary member. And grind.
Set the Z axis along the center line of the workpiece 3, set the Y axis in the substantially vertical direction,
A substantially horizontal X axis orthogonal to both Z-Y axes is set.

The base 10 of the centerless grinding machine is shown in FIG. The base 10 is substantially horizontal, but is often slightly inclined due to various considerations.
The three axes X, Y, and Z are set with reference to the base 10 without using the earth as a reference.
When the workpiece 3 having the head 3a is subjected to centerless grinding, the shaft portion (a portion other than the head) is supported.

The operation of bringing the grinding wheel 4 into contact with the workpiece 3 is called cutting.
There are two methods for cutting.
One of them is that a grinding wheel base 12 that supports the grinding wheel shaft 11 of the grinding wheel 4 is mounted on a grinding wheel slide 13, and the grinding wheel slide is moved as indicated by a reciprocating arrow cc '(in the X-axis direction). It is to slide.
The other is to make the grinding wheel 4 relatively cut and feed by moving the adjusting wheel base 6 supporting the wheel shaft 5 of the adjusting wheel 2 in the X-axis direction.

As described above, the adjustment grindstone 2 supports the workpiece 3 in cooperation with the blade 1 under general working conditions except in special cases, and therefore moves independently without cooperating with the blade. There is no.
Therefore, the adjusting grindstone bed 6 is mounted on the upper slide 7, and this upper slide is further installed on the lower slide 8.
On the other hand, the blade 1 is mounted on the lower slide 8 via a work rest.
By moving the lower slide 8 in the X-axis direction as indicated by the reciprocating arrow b-b ', the adjusting grindstone performs a (relatively) cutting feed operation in the X-axis direction while keeping the positional relationship with the blade constant. .
There is an example in which a horizontal swivel 9 is provided between the upper slide 7 and the lower slide 8, but even if this horizontal swivel is provided, the adjusting grindstone shaft 5 is maintained in the Z-axis direction in the X-axis direction. There is no change in parallel movement.

FIG. 3 is a view for explaining the angular grinding.
When the workpiece 3 has a head 3a as shown in FIG. 5A and the workpiece neck lower surface 3b and corner 3c must be precisely ground, angular grinding is performed as shown in FIG. Is done.
The blade 1, the adjusting grindstone 2 and the workpiece 3 are the same as those shown in FIG. 2A (conventional example), but a grinding grindstone 14 having a special shape is formed.

That is, it has a main conical surface 14a that contacts the shaft portion of the work 3 and a sub-conical surface 14b that contacts the work neck lower surface 3b, and the cross-sectional shape in the vicinity of the intersecting line of both conical surfaces forms a right-angled edge 14c. ing.
As a result, the grinding wheel shaft 15 is inclined with respect to the Z axis.
In the angular grinding of the conventional example, the grinding wheel axis is inclined with respect to the Z axis,
In addition, the outer peripheral surface of the grinding wheel is conical.
In FIG. 3B, the special grinding wheel 14 is cut and fed in a direction perpendicular to the grinding wheel shaft 15 as indicated by an arrow θ.
In this way, the oblique infeed feed is performed by simultaneously providing the feed in the arrow χ direction and the feed in the arrow z direction shown in the figure and combining the vectors in the arrow θ direction.
The following structure is also known as a conventional advantage different from the above.
Only the cutting feed in the z direction is given to the special grinding wheel 14, and the cutting feed in the a ′ direction is given to the adjusting grinding stone 2 to relatively cut the special grinding wheel 14 in the direction of the arrow θ.
In any of the above conventional examples, a special grinding wheel 14 having two conical surfaces is required.
In the prior art, there are many examples in which the adjusting grindstone is cut and slid in the θ direction.
JP-A-9-11097 JP-A-7-328921

In the conventional angular grinding (see FIG. 3B), a specially shaped grinding wheel (14) is used, and the outer peripheral surface has a conical shape.
As a result, for example, the circumferential speed of rotation differs between the point L and the point S shown in the figure. Accordingly, it is naturally impossible to "grind at the optimum peripheral speed".
In addition, the dressing operation of the special grinding wheel 14 requires special skills and a great deal of labor, and has a problem that the life of the grinding wheel is short.
Furthermore, as described with reference to FIG. 3B, not only the arrow χ but also the feed in the direction of the arrow z must be given, so that the mechanism is complicated and the machining accuracy is lowered.

The present invention has been made in view of the above-mentioned circumstances, and it is not necessary to use a specially shaped grinding wheel (it is not impossible to use it), and it has exceptional skill and a great deal. It is an object of the present invention to provide a method and an apparatus capable of performing angular grinding with high efficiency and high accuracy at low cost without requiring labor.
For this reason, there are many conventional examples in which the adjusting grindstone is cut and slid in the θ direction.

  In order to achieve the above object, the present invention assumes a horizontal auxiliary shaft in addition to the three orthogonal axes X, Y, and Z, and translates the grinding wheel (grinding wheel or adjusting wheel) in the direction of the auxiliary shaft. Furthermore, in addition to the cutting operation in the auxiliary axis direction, it is also recommended to provide oscillation in the auxiliary axis direction.

The configuration of the inventive device according to claim 1 is as follows (see FIG. 1 (A)):
Three orthogonal axes X, each consisting of a substantially vertical coordinate axis X, a substantially horizontal coordinate axis Z parallel to the center line m of the workpiece 3 supported by the blade 1, and a Y axis perpendicular to both the X and Z axes. Assuming Y, Z,
Set an auxiliary axis Θ that intersects the X axis at an angle θ in the XZ plane,
The adjusting grindstone shaft 5 is parallel to the Z axis,
A skew slide 16 in the Θ-axis direction is provided,
The grinding wheel 4 is mounted on the oblique slide with the grinding wheel shaft 11 aligned in the Z-axis direction,
The grinding wheel is characterized in that it can be translated in the Θ-axis direction while rotating around the axis.

The configuration of the invention device according to claim 2 is as follows (see FIG. 1B) in the centerless grinding machine,
Three orthogonal axes X, each consisting of a substantially vertical coordinate axis X, a substantially horizontal coordinate axis Z parallel to the center line m of the workpiece 3 supported by the blade 1, and a Y axis perpendicular to both the X and Z axes. Assuming Y, Z,
Set the auxiliary axis Φ that intersects the X axis and the angle φ in the XZ plane,
The grinding wheel shaft 11 is parallel to the Z axis,
An oblique slide 17 in the Φ axis direction is provided,
The adjusting grindstone 2 is mounted on the oblique slide together with the blade 1 by aligning the adjusting grindstone shaft 5 in the Z-axis direction.
The adjusting grindstone is capable of translating in the Φ axis direction while supporting the work 3 in cooperation with the blade.

The configuration of the inventive device according to claim 3 is in addition to the configuration requirements of the inventive device according to claim 1 or claim 2,
The angle θ or the angle φ can be increased or decreased.

The configuration of the inventive device according to claim 4 is in addition to the configuration requirements of the inventive device according to claim 1 or claim 2,
The oblique slide is provided with a driving means so that the grinding wheel (4) or the adjusting wheel (2) can be cut and fed in the auxiliary axis direction,
In addition, at the same time as the above-described cutting feed, the oscillation can be given in the auxiliary axis direction with a shorter stroke and a higher cycle than the cutting feed.

The configuration of the invention method according to claim 5 is a method of angular grinding by a centerless grinding machine (see FIG. 1A),
Three orthogonal axes comprising a substantially vertical coordinate axis X, a coordinate axis Z parallel to the center line (m) of the work 3 supported by the blade 1 and substantially horizontal, and a Y axis perpendicular to both the X and Z axes. Assuming X, Y, Z,
Set an auxiliary axis Θ that intersects the X axis at an angle θ in the XZ plane,
The adjusting grindstone shaft 5 is made parallel to the Z axis, and a skew slide 16 in the Θ axis direction is provided in advance,
The rotating shaft 11 of the grinding wheel is aligned with the Z-axis direction and mounted on the above-mentioned oblique slide,
The grinding wheel is translated in the direction of the auxiliary axis (Θ axis) while being rotated around the axis, and is cut and fed to the workpiece 3 in the direction of the auxiliary axis.

The configuration of the invention method according to claim 6 is a method of angular grinding by a centerless grinding machine (see FIG. 1B),
Three orthogonal axes comprising a substantially vertical coordinate axis X, a coordinate axis Z parallel to the center line (m) of the work 3 supported by the blade 1 and substantially horizontal, and a Y axis perpendicular to both the X and Z axes. Assuming X, Y, Z,
Set the auxiliary axis Φ that intersects the X axis and the angle φ in the XZ plane,
The adjusting grindstone shaft 5 is made parallel to the Z axis, and a skew slide 17 in the Φ axis direction is provided in advance,
The rotating shaft 5 of the adjusting grindstone is aligned in the Z-axis direction and mounted on the above-mentioned oblique slide together with the blade 1
While rotating the adjusting grindstone around the axis and supporting the workpiece in cooperation with the blade 1, the adjusting grindstone and the workpiece are translated in the Φ axis direction,
The grinding wheel 4 is cut relative to the workpiece 3 in the auxiliary axis (Φ axis) direction.

The configuration of the inventive method according to claim 7 is in addition to the configuration requirements of the inventive method of claim 5 or claim 6,
The crossing angle θ or the crossing angle φ is increased or decreased in accordance with the material, shape, and finishing accuracy of the work 3.

The configuration of the inventive method according to claim 8 is in addition to the configuration requirements of the inventive method of claims 5 to 7,
When the oblique slide is fed in the auxiliary axis direction (Θ axis or Φ axis direction), the oblique slide is oscillated with a shorter stroke and higher cycle than the cutting feed.

According to the first aspect of the present invention, the grinding wheel (4) is reliably and easily translated in the auxiliary axis direction (the Θ axis direction) by the oblique slide (16), so that high-precision angular grinding is reduced. Can be done at cost.
According to the apparatus of the first aspect of the present invention, a cylindrical grinding wheel can be used (not necessarily using a conical grinding wheel).
For this reason, the rotational peripheral speed of each part of the outer peripheral surface of the grinding wheel is equal, the centerless grinding can be performed without difficulty, and the grinding finish quality (particularly the surface roughness) is excellent.
In addition, since no conical special grinding wheel is used, special skill and great effort are not required, and dressing work of the grinding wheel is particularly easy, and the life of the grinding wheel is long.

According to the invention of the second aspect, the adjusting grindstone (2) is reliably and easily translated in the auxiliary axis direction (Φ axis direction) by the oblique slide (17), so that high-precision angular grinding is reduced. Can be done at cost.
According to the invention device of the second aspect, a cylindrical grinding wheel can be used (a conical grinding wheel cannot be used).
For this reason, the rotational peripheral speed of each part of the outer peripheral surface of the grinding wheel is equal, the centerless grinding can be performed without difficulty, and the grinding finish quality (particularly the surface roughness) is excellent.
In addition, since no conical special grinding wheel is used, special skill and great effort are not required, and dressing work of the grinding wheel is particularly easy, and the life of the grinding wheel is long.

  According to the third aspect of the invention, the inclination angle of the auxiliary shaft can be selected in a process design according to the shape of the workpiece (workpiece), and each of the various workpieces can be optimally operated. Angular grinding can be performed under certain conditions.

According to the fourth aspect of the present invention, since the oscillation in the same direction as the cutting feed direction of the grinding wheel (auxiliary axis direction oblique to the Z axis) is given, the angular grinding exhibits an aspect that could not be considered conventionally. If this is expressed figuratively, it will be a form of repeating “cutting forward and backward cutting”.
Further, considering the contact pressure between the grinding wheel and the workpiece, the contact pressure repeatedly increases and decreases in a high cycle.
For this reason, the grinding liquid easily flows between the grinding wheel and the workpiece, heat dissipation is improved, the grinding resistance is reduced, and the ground surface is smooth and beautiful.

According to the fifth aspect of the invention, the grinding wheel (4) can be reliably and easily translated in the auxiliary axis direction (the Θ axis direction) by the oblique slide (16), so that high-precision angular grinding is low. Realized at cost.
According to the method of the present invention of claim 5, a cylindrical grinding wheel can be used (not necessarily using a conical grinding wheel).
For this reason, the rotational peripheral speed of each part of the grinding wheel outer peripheral surface is equal, and centerless grinding can be performed without difficulty, and excellent grinding finish quality (particularly surface roughness) can be obtained.
In addition, since no conical special grinding wheel is used, special skill and great effort are not required, and dressing work of the grinding wheel is particularly easy, and the life of the grinding wheel is long.

According to the method of the present invention of claim 6, the adjusting grindstone (2) can be surely and easily translated in the auxiliary axis direction (Φ axis direction) by the oblique slide (17). Can be cut in the direction of the auxiliary shaft, and high-precision angular grinding can be realized at low cost.
The method of the present invention of claim 6 is characterized by the feeding form of the adjusting grindstone, and it is not necessary to greatly change the prior art for the grindstone. Therefore, a cylindrical grinding wheel can be used as in the non-angular grinding (standard type) of the conventional example (a conical grinding wheel cannot be used).
For this reason, the rotational peripheral speed of each part of the grinding wheel outer peripheral surface is equal, and centerless grinding can be performed without difficulty, and excellent grinding finish quality (particularly surface roughness) can be obtained.
In addition, since no conical special grinding wheel is used, special skill and great effort are not required, and dressing work of the grinding wheel is particularly easy, and the life of the grinding wheel is long.

  According to the method of the invention of claim 7, since the inclination angle of the auxiliary shaft is selected in the process design according to the shape of the workpiece (workpiece), the optimum working conditions are applied to various workpieces. Angular grinding can be performed.

According to the eighth aspect of the invention, since the oscillation in the same direction as the cutting feed direction of the grinding wheel (auxiliary axis direction oblique to the Z axis) is provided, the angular grinding has an aspect that could not be considered in the past. If this is expressed figuratively, it will be a form of repeating “cutting forward and backward cutting”.
Further, considering the contact pressure between the grinding wheel and the workpiece, the contact pressure repeatedly increases and decreases in a high cycle.
For this reason, it becomes easy for the grinding liquid to flow between the grinding wheel and the workpiece, heat dissipation is improved, grinding resistance is reduced, and a smooth and beautiful ground surface is obtained.

1A and 1B show an embodiment of the present invention, in which FIG. 1A is a schematic plan view corresponding to claims 1 and 5, and FIG. 1B is a schematic plan view corresponding to claims 2 and 6. FIG.
Since it is a plan view, a horizontal coordinate axis XZ appears. The Y axis is perpendicular to the paper surface and passes through the intersection of both the X and Y axes.
The orthogonal coordinate axes X, Y, and Z in the present invention are the same as those described above in paragraph 0003 with reference to FIG. 2B, and the base (10 in FIG. 3B) is XZ. Set as a face.

(See FIG. 1 (A)) The adjusting grindstone 2 is arranged so that the adjusting grindstone shaft 5 is aligned in the Z-axis direction and is sent in the X-axis direction as indicated by a reciprocating arrow aa ′.
These functions are the same as those in FIG. 2A depicting the conventional example.
Such a function is obtained by a structure similar to that shown in FIG. 2B depicting a conventional example (obtained by the lower slide 8 or an equivalent structure).

The grinding wheel 4 of the present embodiment does not necessarily have a special shape. A grinding wheel head (not shown in the figure, the same constituent member as the grinding wheel base 12 in FIG. 2) for supporting the grinding wheel shaft 11 is mounted on the oblique slide 16.
The sliding direction of the oblique slide is the auxiliary axis Θ direction.
The Θ axis is in the XZ plane and intersects the X axis at an angle θ. The skew slide 16 in the present embodiment is configured such that the value of the angle θ can be adjusted.
Because of such a structure, angular grinding can be performed without necessarily performing vector composition feed in the χ direction and the z direction, as shown in FIG. Therefore, the apparatus is simple, the production cost is low, and the grinding accuracy is high.
The centerless grinding machine of this embodiment is provided with an X slide 18 that slides in the X-axis direction, and a skew slide 16 is mounted on the X slide 18. With this configuration, normal centerless grinding can be performed by operating the X slide 18 while the skew slide 16 is stopped, and the X slide 18 and the skew slide 16 are used in combination. High-level centerless grinding can also be performed.

The grinding wheel 4 of this example has a cylindrical shape, and its planar projection shape is a rectangle. When this grinding wheel is fed in the Θ-axis direction as shown by the arrow d by the oblique slide 16, the corner 3c of the workpiece 3 is ground with high accuracy. At the same time, the shaft portion 3d and the neck lower surface 3b of the workpiece are also ground to perform angular grinding.
When angular grinding is performed by the centerless grinding machine of this example, the angle is adjusted to the optimum angle θ mainly based on the shape of the workpiece 3 and taking into consideration the material and finishing accuracy of the workpiece.

Since the grinding wheel 4 of this example is cylindrical, the peripheral speed when rotating any part of the cylindrical surface is equal. Therefore, centerless grinding can be performed under the optimum conditions at the same peripheral speed over the entire length of the shaft portion 3d of the workpiece 3.
Further, since the grinding wheel 4 and the adjusting wheel 2 are cylindrical, dressing can be performed without requiring special skill and great labor, and the life of the grinding wheel is long.
Although not shown, the angular grinding apparatus of the present invention can also be applied to “a workpiece having a tapered surface”.

The oblique slide 16 is slid in the Φ-axis direction as indicated by a reciprocating arrow d, but in addition to this, it can be oscillated in the same direction (Φ-axis direction).
In other words, it is reciprocated in the same direction as the above slide with a short stroke and a high cycle.
By applying oscillation to the angular grinding, the grinding fluid can easily enter between the grinding wheel and the workpiece, the grinding resistance is reduced, the generation of grinding heat is reduced, and the dissipation of the grinding heat is improved. As a result, work efficiency can be improved while maintaining high accuracy (particularly surface roughness).

FIG. 1B shows an embodiment different from FIG. 1A described above, and the setting of the coordinate axes X and Z is the same as in FIG. 1B (therefore, the Y axis is also the same).
Assume an auxiliary axis Φ located in the Z-X plane and intersecting the X axis at an angle φ. A skew slide 17 is disposed along the axis Φ, and the adjusting grindstone 2 is mounted. Specifically, an adjustment wheel head for supporting the adjustment wheel shaft is mounted. These constituent members are similar to those of the conventional example (see FIG. 2B).
A blade 1 is mounted on the skew slide 17 together with the adjusting grindstone 2 so that the state in which the work 3 is supported by the adjusting grindstone and the blade is not disturbed.

The grinding wheel 4 and its supporting structure and drive mechanism in the embodiment of FIG. 1 (B) are similar to the conventional example shown in FIG. 2 (B), as shown by a reciprocating arrow cc ′. It can slide.
In short, the embodiment of FIG. 1B is characterized in that the adjusting grindstone 2 and the blade 1 are mounted on the oblique slide 17 and sent in the direction of the auxiliary shaft Φ.
Also in this example, as in the embodiment of FIG. 1A described above, the oblique slide 17 can be oscillated in the auxiliary axis Φ direction, and the inclination angle φ of the auxiliary axis Φ is increased or decreased. Can be adjusted.

1 shows an embodiment of the present invention, (A) is a schematic plan view of one embodiment, (B) is a schematic plan view of an embodiment different from the above. A typical example of a centerless grinding machine is shown, (A) is a schematic plan view, and (B) is a schematic front view. It is shown in order to explain angular grinding in centerless grinding, (A) is an external front view depicting an example of a workpiece, (B) is a grinding wheel, blade, workpiece, and adjusting wheel of special shape A plan view schematically showing the arrangement relationship

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Blade 2 ... Adjusting grindstone 3 ... Work 3a ... Work head 3b ... Work neck lower surface 3c ... Corner 3d ... Shaft 4 ... Grinding wheel
5 ... Adjusting wheel axis
6 ... Adjusting wheel head
7 ... Upper slide
8 ... Lower slide
9 ... Horizontal swivel
10 ... Base
11 ... Grinding wheel axis
12 ... Grinding wheel head
13 ... Grinding wheel slide
14 ... Special grinding wheel
14a ... Main conical surface
14b ... Subconical surface
14c ... right angle edge
15 ... grinding wheel shaft
16 ... Slant slide
17 ... Slant slide
18 ... X slide

Claims (8)

In centerless grinding machine,
From a substantially vertical coordinate axis X, a substantially horizontal coordinate axis Z parallel to the center line (m) of the workpiece (3) supported by the blade (1), and a Y axis perpendicular to both the X and Z axes. Assuming orthogonal three axes X, Y, Z consisting of
Set an auxiliary axis Θ that intersects the X axis at an angle θ in the XZ plane,
The adjustment wheel axis (5) is parallel to the Z axis,
A skew slide (16) in the Θ-axis direction is provided,
The grinding wheel (4) is mounted on the skew slide with the grinding wheel shaft (11) aligned in the Z-axis direction,
An angular grinding apparatus in a centerless grinding machine, wherein the grinding wheel is adapted to be able to translate in the Θ-axis direction while rotating around an axis. In centerless grinding machine,
From a substantially vertical coordinate axis X, a substantially horizontal coordinate axis Z parallel to the center line (m) of the workpiece (3) supported by the blade (1), and a Y axis perpendicular to both the X and Z axes. Assuming orthogonal three axes X, Y, Z consisting of
Set the auxiliary axis Φ that intersects the X axis and the angle φ in the XZ plane,
The grinding wheel axis (11) is parallel to the Z axis,
A skew slide (17) in the Φ axis direction is provided,
The adjusting grindstone (2) is mounted on the oblique slide together with the blade (1) by aligning the adjusting grindstone shaft (5) in the Z-axis direction,
An angular grinding apparatus in a centerless grinding machine, wherein the adjusting grindstone is adapted to be able to translate in the Φ-axis direction while supporting a workpiece (3) in cooperation with a blade.   The angular grinding apparatus in the centerless grinding machine according to claim 1 or 2, wherein the angle θ or the angle φ can be adjusted to be increased or decreased. The oblique slide is provided with a driving means so that the grinding wheel (4) or the adjusting wheel (2) can be cut and fed in the auxiliary axis direction,
And, at the same time as the infeed, the oscillation can be given in the auxiliary axis direction with a shorter stroke and a higher cycle than the infeed. Angular grinding equipment for centerless grinding machines. In the method of angular grinding with a centerless grinding machine,
From a substantially vertical coordinate axis X, a substantially horizontal coordinate axis Z parallel to the center line (m) of the workpiece (3) supported by the blade (1), and a Y axis perpendicular to both the X and Z axes. Assuming orthogonal three axes X, Y, Z consisting of
Set an auxiliary axis Θ that intersects the X axis at an angle θ in the XZ plane,
The adjusting grindstone axis (5) is made parallel to the Z axis, and a skew slide (16) in the Θ axis direction is provided in advance,
The rotating shaft (11) of the grinding wheel is aligned with the Z-axis direction and mounted on the skew slide.
An angular grinding method in a centerless grinding machine, characterized in that the grinding wheel is translated in the Θ-axis direction while rotating around an axis and cut and fed in the auxiliary axis direction with respect to the work (3). In the method of angular grinding with a centerless grinding machine,
From a substantially vertical coordinate axis X, a substantially horizontal coordinate axis Z parallel to the center line (m) of the workpiece (3) supported by the blade (1), and a Y axis perpendicular to both the X and Z axes. Assuming orthogonal three axes X, Y, Z consisting of
Set the auxiliary axis Φ that intersects the X axis and the angle φ in the XZ plane,
The adjusting grindstone shaft (5) is made parallel to the Z-axis, and a skew slide (17) in the Φ-axis direction is provided in advance,
Align the rotating shaft (5) of the adjusting grindstone with the Z-axis direction and mount it on the above-mentioned skew slide together with the blade (1)
While rotating the adjusting grindstone around the axis and supporting the workpiece in cooperation with the blade (1), the adjusting grindstone and the workpiece are translated in the Φ axis direction,
An angular grinding method in a centerless grinding machine, characterized in that the grinding wheel (4) is cut relative to the workpiece (3) in the Φ axis direction.   The angular grinding method in the centerless grinding machine according to claim 5 or 6, wherein the intersection angle θ or the intersection angle φ is increased or decreased according to the material, shape, and finishing accuracy of the workpiece (3). 8. The method according to claim 5, wherein when the oblique slide is fed in the auxiliary axis direction, the oblique slide is oscillated with a shorter stroke and a higher cycle than the cutting feed. Angular grinding method for centerless grinding machines.

Images