JP2966955B2 - Grinding method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding method and apparatus for forming curved surfaces in two different directions of a workpiece, for example, a slipper surface of a rocker arm.

[0002]

2. Description of the Related Art For example, a rocker arm for operating a valve of an automobile engine has a slipper surface in contact with a cam portion provided on a cam shaft.
Conventionally, a process of grinding the slipper surface into a curved surface shape has been performed.
No. 12010 discloses this.

In this prior art, a slipper surface of a rocker arm is pressed against a grinding surface formed in a direction perpendicular to a rotation axis of a disc-shaped grindstone, and the rocker arm is swung around a swing center of a jig. Then, the slipper surface is curved. Therefore, in the swing direction of the slit surface
, While the rounded surface is formed through the ground surface, the rocking
Width direction crossing the moving direction that has a linear shape.

Incidentally, the contact portion between the slipper surface and the cam portion is manufactured with high precision in order to achieve high surface pressure and high sliding speed. There is a possibility that one-sided hit occurs. Especially,
If the width direction of the slipper surface is linear as described above, the slipper surface 4 of the rocker arm 2 and the cam portion 6 are likely to hit one another, as shown in FIG. In addition, there arises a problem that the opening / closing operation of the valve cannot be controlled as designed.

Therefore, in the above prior art, an annular grinding surface having a constant width is provided around the end face of the disc-shaped grinding wheel.
It has been considered to form a curved surface in the width direction of the slipper surface using the inner corner portion of the annular ground surface .

[0006]

However, as described above, when grinding is performed at the inner diameter corner portion of the annular grinding surface of the disk-shaped grinding wheel, the grinding wheel is required to be shaped according to the widthwise dimension of the slipper surface.
Of it is necessary to set the diameter, the diameter of the grinding wheel resulting in considerably large Tsu Na. In addition, it has been pointed out that there is a problem that chipping and abrasion of the inner diameter corner portion become remarkable. Further
In, when to change the width direction of the curved shape of the sliding surface is
It is necessary to change the diameter of the grinding wheel according to the curved surface shape.
You. For this reason, the curved shape of the slipper surface in the width direction is changed.
Each time it is used, it is necessary to replace the grindstones with different diameters, which is inefficient and uneconomical.

The present invention solves this kind of problem, and can easily form a curved surface on a workpiece in two different directions, and can cope with a change in the shape of the curved surface. It is an object of the present invention to provide a grinding method and apparatus capable of grinding.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a work held by a jig, which swells in an axial direction from a peripheral edge of an end face and extends in a direction perpendicular to an axis. It is arranged a disc-shaped grindstone having a flat inclined ground surface inclined at a predetermined angle against the tilt by rotating the pre-Symbol grindstone
While forming part of the conical grinding surface with the grinding surface, the cone
Away from the axis of the conical grinding surface in the radial direction of the conical grinding surface
Through a jig having a swing axis crossing in the radial direction at a position
Then, the workpiece is moved along the inclination direction of the conical grinding surface.
The Rukoto slide, and carrying out simultaneously curved grinding the in the width direction intersecting the workpiece to the swinging direction and the swing direction in the inclined ground surface.

Further, the present invention provides a disk-shaped grinding wheel having a flat inclined grinding surface which swells in the axial direction from the peripheral edge of the end face and is inclined at a predetermined angle with respect to a direction perpendicular to the axis, and And the inclined grinding surface is
To form a part Rutotomoni, a movable movable body oriented to the workpiece, said conical Labs from the axis of the conical grinding surface
The rocking crossing in the radial direction at a position separated in the radial direction of the cut surface
And has a shaft, said a rocking means for sliding by holding the workpiece along a machining surface of the workpiece to the inclination direction of the conical grinding surface, for modifying the inclined ground surface And a grindstone correcting means.

[0010]

In the grinding method according to the present invention, the workpiece held by the jig is swung at a position corresponding to the inclined grinding surface of the grindstone. In addition to the direction, the curved grinding is performed in two different directions corresponding to the shape of the inclined grinding surface.

Further, in the grinding apparatus according to the present invention, it is possible to arrange the grindstone with respect to the grindstone correcting means, and to perform the work of correcting the inclined grinding surface by the grindstone correcting means.
At this time, it is possible to easily change the curved shape of the workpiece by selecting the inclination angle of the inclined grinding surface of the grindstone to a desired angle.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a grinding method and apparatus according to the present invention.

In FIG. 1, reference numeral 10 denotes a grinding wheel according to this embodiment. The grinding wheel 10 has an inclined grinding surface 1 inclined by a predetermined angle に 対 し て with respect to its axis O.
2 is provided. The inclined grinding surface 12 is provided in a ring shape on the side surface of the grindstone 10 and is inclined inward of the radius of the grindstone 10.

The grinding wheel 10 constructed as described above is mounted on a grinding device 20. As shown in FIG.
Numeral 0 denotes a movable main body 22 that rotates the grindstone 10 and is movable in an axial direction (arrow X direction) and a direction crossing the same (arrow Z direction), and a slipper surface (working) of the rocker arm 2 as a workpiece. Surface 4 is held opposite the inclined grinding surface 12 of the grindstone 10, a swing jig (swing means) 24 for swinging the slipper surface 4, and a device for correcting the inclined grinding surface 12. And a grindstone correcting means 26.

The movable main body 22 has a Z-axis rail 30 disposed on a base 28. The Z-axis rail 30 has a Z-axis that can move forward and backward through a ball screw 34 connected to a Z-axis motor 32. The table 36 is engaged. This Z axis table 3
The X-axis rail 38 and the X-axis motor 40 are disposed on the X-axis motor 6, and the X-axis table 44 is engaged with a ball screw 42 connected to the X-axis motor 40. A grindstone drive motor 46 is arranged on the X-axis table 44, and the grindstone 10 is fixed to a rotating shaft 48 connected to the grindstone drive motor 46.

The swing jig 24 has a rotary table 54 driven to rotate by a motor 50 and a speed reducer 52, and the rocker arm 2 is positioned and fixed to the rotary table 54 via a clamp means 56.

The grinding wheel correcting means 26 has a motor 60 fixed on a base 58, and a rotating shaft 62 of the motor 60 holds a dressing member 64 such as a diamond roll.

Next, the grinding wheel 1 constructed as described above is used.
0 and the operation of the apparatus 20 will be described in relation to the grinding method according to the present embodiment.

First, the rocker arm 2 is positioned and fixed on the rotary table 54 constituting the swing jig 24 via the clamp means 56. Further, the movable body 22 moves in the directions of the arrow Z and the arrow X under the action of the Z-axis motor 32 and the X-axis motor 40, and the grindstone 10 fixed to the movable body 22 is moved to the slipper surface of the rocker arm 2. 4 is determined.

Then, while the grindstone driving motor 46 is driven to rotate the rotary shaft 48 and the grindstone 10 integrally, the rotating table 54 is driven by the motor 50 through the speed reducer 52.
Swings in the direction of arrow C integrally with the rocker arm 2 within a predetermined angle range. For this reason, as shown in FIG.
The slipper surface 4 of the rocker arm 2 swings along an arc-shaped locus having a radius R and is ground into a curved surface corresponding to the arc.

At this time, the inclined grinding surface 12 of the grindstone 10 constitutes a part of the inner surface of a cone F having an apex as shown in FIG. 1 and FIG. Therefore, when the slipper surface 4 swings and displaces in the direction of arrow C, the surface of the slipper surface 4 in the width direction (direction of arrow D) is ground to a convex curved surface corresponding to the inner surface shape of the cone F over the width W. .

In this case, in this embodiment, the inclined grinding surface 12 is formed on the grindstone 10, and the slipper surface 4 of the rocker arm 2 is swung in the direction of arrow C with respect to the inclined grinding surface 12 only by swinging displacement. The effect is obtained that the surface of the slipper surface 4 in the direction of the arrow C and the surface of the slipper surface 4 in the direction of the arrow D can be easily and accurately ground to a desired convex curved surface. In addition, it is possible to reduce the loss and wear of the grindstone 10 at a stroke as compared with the conventional one using the inner corner portion of the grindstone, so that the grindstone 10 can be effectively used for a long time. With
The slipper surface 4 can be ground with high precision. Furthermore, the diameter of the grindstone 10 can be reduced as compared with the conventional grindstone, and the advantage that the manufacturing cost of the grindstone 10 can be easily reduced is also obtained.

When the shape of the slipper surface 4 to be ground is different, the inclination angle of the inclined grinding surface 12 of the grinding wheel 10 may be changed by the grinding wheel correcting means 26 constituting the grinding device 20. In other words, the grinding wheel 10 is
After being arranged corresponding to the dressing member 64 of FIG.
Drive control of the axis motor 32 and the X-axis motor 40 moves the grindstone 10 in the arrow Y direction in FIG. At that time,
By driving the grinding wheel drive motor 46 and the motor 60, the grinding wheel 1
By rotating the 0 and the dressing member 64, the correction processing is performed at a predetermined angle on the inclined grinding surface 12 of the grindstone 10 via the dressing member 64.

Therefore, in the grinding apparatus 20 according to the present embodiment, even if the curved surface shape of the slipper surface 4 is changed,
It is not necessary to replace the wheel, and it is possible to easily cope with the operation of the grinding wheel correcting means 26. Thereby, the slipper surface 4
There is no need to prepare a large number of grindstones in response to the change in the curved surface shape, and the effect of being extremely economical can be obtained.

In the above-described embodiment, even when the moving direction of the movable body 22 of the grinding apparatus 20 is limited to the X direction and the grinding wheel correcting means 26 is configured to be movable in the X direction and the Z direction, Similarly, the grinding operation of the grindstone 10 can be performed. Further, the moving direction of the movable main body 22 of the grinding device 20 is limited to only the X direction, and the grinding wheel 1
The angle with respect to 0 may be arbitrarily settable.

Next, a grindstone 80 according to another embodiment of the present invention will be described.
Is shown in FIG.

The grindstone 80 has an inclined grinding surface 82 inclined by a predetermined angle に 対 し て 1 with respect to its axis O1. The inclined grinding surface 82 is provided in a ring shape on the side surface of the grindstone 80, and is inclined toward the outside of the radius of the grindstone 80, and a part of the outer surface of the cone F1 having the vertex substantially at A1. Is composed.

Therefore, when the surface N to be processed is oscillated in the direction of the arrow C1, the surface of the surface N in the width direction becomes a cone F
1 is ground into a concave curved surface corresponding to the outer shape. That is, in the grinding stone 80, an effect is obtained that a convex curved surface and a concave curved surface can be simultaneously formed with high accuracy with respect to the surface N to be processed.

[0029]

According to the grinding method of the present invention, the following effects can be obtained.

Since the workpiece held by the jig is swung at a position corresponding to the inclined grinding surface of the grindstone, the workpiece has not only the swing direction but also the shape of the inclined grinding surface. Correspondingly, curved grinding is performed in different directions. In other words, when the grindstone swells in the axial direction from the peripheral edge of the end face,
Both inclined at a predetermined angle to the direction perpendicular to the axis
An inclined grinding surface is provided, and the grinding wheel rotates
The inclined grinding surface forms a part of a conical grinding surface. this
Therefore, when the workpiece swings, the workpiece
At the same time as the curved grinding process is performed in the swinging direction,
For the inner surface shape of the conical grinding surface in the width direction crossing the swing direction
A corresponding curved grinding process is performed. As a result, a curved surface can be formed on the workpiece in two different directions simultaneously and with high precision. In addition, since the durability is superior to that using a corner portion of the grindstone, the grindstone can be used efficiently.

Further, in the grinding apparatus according to the present invention, the grindstone is arranged on the grindstone correcting means, and the work of correcting the inclined grinding surface can be performed by the grindstone correcting means. In this case, by controlling the moving direction of the movable main body or controlling the grindstone correcting means, the inclination angle of the inclined grinding surface can be selected to a desired angle, and the curved surface shape of the workpiece can be easily changed. Become.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a grinding wheel applied to the method of the present invention.

FIG. 2 is an explanatory perspective view of a grinding apparatus according to the present invention.

FIG. 3 is an explanatory view of processing by the grinding wheel.

FIG. 4 is a schematic explanatory view of a grinding wheel according to another embodiment.

FIG. 5 is an explanatory view of a conventional one-side contact between a rocker arm and a cam portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Rocker arm 4 ... Slipper surface 10 ... Grinding grindstone 12 ... Inclined grinding surface 20 ... Grinding device 22 ... Movable main body 24 ... Swing jig 26 ... Grinding stone correction means 32, 40, 46, 50, 60 ... Motor 64 ... Dressing member 80 ... Grinding wheel 82 ... Inclined grinding surface

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiya Komatsu 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. (72) Inventor Kazuki Kawai 1-10-1 Shinsayama, Sayama City, Saitama Honda Engineering (56) References JP-A-64-12010 (JP, A) JP-A-62-282856 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B24B 19/00

Claims (3)

(57) [Claims] 1. A disk-shaped workpiece having a workpiece held by a jig and a flat inclined grinding surface swelling in the axial direction from a peripheral edge of the end face and inclined at a predetermined angle with respect to a direction perpendicular to the axis. It is arranged a grinding wheel, the conical grinding surface in the inclined ground surface by rotating the pre-Symbol grindstone
While forming a part, the conical grinding surface
The radially intersecting position at the radially separated position of the conical grinding surface
Through the jig having the inserted swing axis, the workpiece is
The Rukoto slid along the inclination direction of the cone-shaped grinding surface,
A grinding method comprising simultaneously performing a curved grinding process on the workpiece in a swing direction and a width direction intersecting the swing direction on the workpiece on the inclined grinding surface. 2. The grinding method according to claim 1, wherein the workpiece is a rocker arm, and the slipper surface of the rocker arm is ground by a grinding surface of a grindstone. 3. A disk-shaped grindstone having a planar inclined grinding surface which swells in the axial direction from a peripheral edge of the end face and is inclined at a predetermined angle with respect to a direction perpendicular to the axis. Rotate the conical grinding surface with the inclined grinding surface
The rewritable forms part, directed to a movable movable body to the workpiece, the radial direction of the conical grinding surface from the axis of the conical grinding surface
Has a swing axis crossing in the radial direction at a position separated from
With a swinging means for sliding the working surface of the workpiece along the inclination direction of the conical grinding surface while holding the workpiece, and the grinding wheel correction means for correcting the inclined ground surface An apparatus for grinding, comprising: