JPH0347814Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a workpiece support device for an internal grinder.

[Conventional technology]

In internal grinding machines, the so-called one-shoe two-roller system is conventionally known as a support method for the workpiece, and as shown in FIG. , held by the fixed shoe 24 and the pressure roller 29,
The side surface of the workpiece 22 is pressed against the guide plate 26 by the rotor 25 of the pressure cylinder, and the roller 2
This method rotates the workpiece 22 by rotating the workpieces 3 and 29, and this method has the advantage that the support rigidity of the workpiece during grinding is high and automation of grinding is relatively easy. In addition, in the figure, 27 is a grinding wheel.

Furthermore, in the internal grinding machine equipped with the one-shoe, two-roller type workpiece support device described above, the inner ring groove of the annular workpiece, for example, the inner ring groove 28a of the bearing outer race 28 as shown in FIG. When grinding is performed using 28b as a reference, the machined inner ring groove 28a is required to be perpendicular to the outer race outer peripheral surface 28b or parallel to the outer race side surface 28c.

In order to ensure the perpendicularity or parallelism of the inner ring groove, the outer circumferential surface and side surfaces of the outer race are required to be at right angles to each other. It is difficult to process it so that it is perpendicular, and in reality, the side surface is often inclined by about 10 to 20 microns with respect to the outer circumferential surface.

[Problem that the invention attempts to solve]

However, in the conventional one-shoe, two-roller type workpiece support device, as shown in FIG.
Since the side surface of the annular workpiece is supported by pressure on the entire surface of a, the bearing outer race 2 is tilted as described above.
8, the outer race side surface 28c
As shown in Figures a and b, the inner ring groove 28 is not parallel to the pressing surface 25a and the supporting surface 26a, and in that state
When a was ground, there was a problem that the inner ring groove 28a was not parallel to the outer race side surface 28c, as shown in FIG. 7c.

In view of such problems, this invention was developed for an internal grinding machine that can perform internal grinding parallel to the side surface of the workpiece even when the side surface of the workpiece is inclined with respect to the outer peripheral surface. The purpose is to provide a support device.

[Means for solving problems]

Therefore, in the workpiece support device for an internal grinding machine according to this invention, the supporting surface of the guide plate and the pressing surface of the rotor of the presser cylinder are placed on the shoe support side with respect to the plane whose intersection line passes through the center of the fixed shoe. It was set up so that the

[Effect]

In this invention, the rotor pressing surface and the guide plate support surface of the pressure cylinder are arranged with a predetermined opening angle with respect to the fixed shoe, so that the outer peripheral surface of the workpiece is fixed and the side surface is fixed. The part near the shoe is pressed and supported at three points: the rotor pressing surface and the guide plate support surface, and even when the workpiece is rotated, the stationary shoe side part of the workpiece faces the rotor pressing surface or the guide plate supporting surface. By pressing the grinding wheel against the fixed shoe side portion of the inner surface of the workpiece, the workpiece is internally ground parallel to the side surface.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a workpiece support device for an internal grinding machine according to an embodiment of the present invention. In the figure, a stationary roller 2, a fixed shoe 3, and a pressure roller 4 are mounted on a base 1 to form an annular workpiece (workpiece).
The rotating shaft 6 of the stationary roller 2 is rotatably supported on the base 1, and the fixed shoe 3 is fixed to the base 1.
The rotating shaft 7 of the pressure roller 4 is connected to a swing bracket 8.
The rotating shafts 6 and 7 of the stationary roller 2 and the pressure roller 4 are supported by belts 9 and 10, respectively.
It is connected to drive motors 11 and 12 via. The swing bracket 8 is supported by the base 1 so as to be able to swing up and down, and the swing bracket 8 is provided with a clamping cylinder 13 for swinging it up and down.

Further, on the base 1, a front plate (guide plate) 14 and a guide regulating member 1 are arranged to sandwich a stationary roller 2, a fixed shoe 3, and a pressure roller 4.
5 is provided, and a rear plate (rotor) 16 is housed in the guide regulating member 15.
A pressure cylinder 17 is disposed behind the workpiece 6, and the rear plate 16 presses the side surface of the annular workpiece 5 against the front plate 14. Further, the front plate 14 is formed with an insertion hole 14b into which the grinding wheel 18 is inserted.

The base 1 also has an in-shute 19 for guiding the workpiece 5 between the rollers 2, 4 and the fixed shoe 3, and an outer chute 20 for discharging the workpiece 5 from between the rollers 2, 4 and the fixed shoe 3.
A workpiece pusher 21 is arranged behind the stationary shoe 3 to send the workpiece 5 guided by the insert 19 between the rollers 2, 4 and the stationary shoe 3.

In the workpiece support device of this embodiment, the support surface 14a of the front plate 14 and the pressing surface 16a of the rear plate 16 are located on the shoe support side with respect to a plane whose intersection line passes through the center of the fixed shoe 3. It is slanted like this.

Next, the effects will be explained.

In the present invention, the pressure roller 4 swings upward before its operation, and when this device is operated, the work pusher 21 first moves to the insert 19.
When the workpiece 5 located at the lower end is pushed out and comes between the stationary roller, fixed shoe 3, and pressure roller 4, the clamping cylinder 13 is activated and the pressure roller 4 swings downward, and the outer peripheral surface of the workpiece 5 is pushed out. is held under pressure by a stationary roller 2, a fixed shoe 3, and a pressure roller 4. At the same time, pressure cylinder 17
operates, the rear plate 16 presses the side surface of the workpiece 5 against the front plate 14, the side surface of the workpiece 5 presses against the front plate 14, and the side surface of the workpiece 5 presses against the support surface 14a of the front plate 14 and the pressing surface of the rear plate 16. It is pressed and held between 16a.

When the workpiece 5 is held in this way, the drive motors 11 and 12 are activated, the stationary roller 2 and the pressure roller 4 are rotated, and the workpiece 5 is accordingly rotated.
Further, the grinding wheel 18 is inserted into the workpiece 5 from the side of the front plate 14 through the plate insertion hole 14b and pressed against the inner peripheral surface of the workpiece 5, thereby grinding the groove 5a on the inner peripheral surface of the workpiece 5. . When the grinding process is finished, the pressure roller 4 swings upward again, and the finished workpiece 5 is transported to the outside via the outer chute 20, and in this state it waits for the next workpiece 5 to be brought in. .

At this time, in this device, since the front plate 14 and the rear plate 16 are arranged with a predetermined opening angle with respect to the fixed shoe 3, the workpiece 5 is placed on the supporting surface of the front plate 14.
4a, the upper end of the pressing surface 16a of the rear plate 16, and the tip of the fixed shoe 3, the side surface of the workpiece 5 is inclined with respect to the outer peripheral surface as shown in FIG. If you are
The part of the workpiece 5 located on the lower side in the figure changes to the left and right with respect to the fixed shoe 3, as shown by the solid line or the two-dot chain line in FIG. 4, but the part of the workpiece 5 located on the upper side in the figure does not displace. As a result, a groove 5a parallel to the side surface of the workpiece 5 is ground.

In the above embodiment, the case where an inner ring groove is ground is explained, but the present invention can of course be similarly applied to a case where a step is ground on the inner surface of a workpiece.

[Effect of idea]

As described above, according to the workpiece support device for an internal grinder according to the present invention, the support surface of the guide plate and the pressing surface of the rotor of the presser cylinder are aligned with respect to the plane whose intersection line passes through the center of the fixed shoe. Since it is provided so as to be located on the shoe support side, even if the perpendicularity of the side surface of the workpiece is not sufficient, there is an effect that internal grinding can be performed parallel to the side surface of the workpiece.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a workpiece support device for an internal grinder according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of the device, and FIG. 3 is an enlarged sectional view of the main parts of the device. FIG. 4 is a diagram for explaining the operation of the above device, FIGS. 5 a and b are a side view and a plan view for explaining the conventional device, respectively, and FIG. 6 is a cross section showing an example of a workpiece. Figures 7a, 7b, and 7c are diagrams for explaining the problems that the invention attempts to solve. 2...Fixed roller, 3...Fixed shoe, 4...
Pressure roller, 5...Work (workpiece), 14...
...Front plate (guide plate), 14a
...Press surface, 16...Rear plate (rotor),
16a...pressing surface.

Claims (1)

[Scope of Claim for Utility Model Registration] While the outer periphery of the workpiece is held by a stationary roller, a fixed shoe, and a pressure roller, the side surface of the workpiece is pressed against a guide plate by a rotor of a pressure cylinder, In an internal grinding machine that rotates the workpiece by rotating the roller and grinds the inner surface of the workpiece, the intersection line of the support surface of the guide plate and the pressing surface of the rotor is the line of intersection of the support surface of the guide plate and the pressing surface of the rotor. 1. A workpiece support device for an internal grinding machine, characterized in that the workpiece support device is provided at an angle to be located on the fixed shoe support side with respect to a plane passing through the center.