JPH01115562A - Superfinish device - Google Patents

Abstract

PURPOSE:To ensure the straightforwardness of worked surface of a workpiece and improve the finished surface by providing a means for holding the supply side polishing film and the take-up side polishing film respectively with pinching frictional forces on a vibration head for vibrating axially a hard roller. CONSTITUTION:A polishing film 40 is trained over a hard contact roller 50 and pressed against a workpiece W rotating clockwise. Then, the roller 50 is axially vibrated by a vibration head while the polishing film 40 is taken up to vibrate and polish the worked surface of workpiece W while maintaining the straightforwardness of workpiece. Then, push rollers (frictional holding means) 51, 52 provided on the vibration head are pressed against the contact roller 50 so that the polishing film 40 semicircularly passing by the contact roller 50 contacts completely intimately the hard contact roller 50 to increase the contact resistance force of both 40, 50 larger than the polishing resistance force of workpiece W. Thus, the worked surface can be always ground into a satisfactory finished surface without directional properties.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a superfinishing apparatus used for superfinishing a workpiece made of soft material such as rubber, and particularly a round surface to be machined.

``Background of the Invention'' Superfinishing equipment has the characteristic that it always provides stable machining efficiency and precision, and does not require any skill because it is a disposable tool system that is easy to handle.

As a general superfinishing device, there is one shown in FIGS. 10 and 11, for example.

That is, a contact roller 3 wrapped with an abrasive film 2 is placed at a position facing the round material l that is the workpiece, and the abrasive film 2 is a thin polyester film coated with well-controlled abrasive grains that are uniformly dispersed. The contact roller 3 is generally made of a rubber elastic body. By lightly pressing the back surface of the polishing film 2 against the surface to be processed, rotating the round material l in the A direction in FIG. 10, vibrating the contact roller 3 and the polishing film 2 in the B direction, and winding the polishing film 2 in the C direction. Surface finishing is progressing, and the locus 1a of the abrasive particles of the polishing film 2 during operation has a waveform as shown by the broken line in FIG. 1θ, and therefore the finished surface has no directionality.

FIG. 11 is a schematic diagram of the configuration of the superfinishing device, in which the polishing film 5 is wound from the supply spool 4 to the take-up spool IO via guide rollers 6°7, 8.9, and the contact roller is attached to the movable support 11. 12 is attached and operated by a pneumatic cylinder 19. A vibrating head frame 17 is movably supported on guide shafts 13.14, 15.16 and is vibrated and driven by a motor 18. A round work piece W is attached to a lathe, and a super finishing device is attached to a cross slide of a table T of the lathe facing the round work piece W.

In the above-mentioned super finishing device, the contact roller 12 and the polishing film 5 are required to match their vibrational movements, and the contact roller 12 is
The condition is that the contact resistance between the surface and the back surface of the polishing film 5 is greater.

Conventionally, there have been many demands for super finishing of hard workpieces such as metal materials, and the above conditions have been satisfied by using a soft material such as rubber as the contact roller 12.

In recent years, there has been a demand for super finishing of soft workpieces.

``Invention or problem to be solved'' However, conventional general super finishing! In this case, since the contact roller 12 is made of soft material such as rubber, there is a problem that if the workpiece is soft, the straightness of the work surface cannot be ensured.

Furthermore, if the contact roller 12 is simply made of a hard material, the magnitude relationship between the polishing resistance force and the contact resistance force becomes unstable, which poses the problem that appropriate superfinishing cannot be achieved.

The present invention was made by focusing on these problems.
It is an object of the present invention to provide a super-finishing device that can ensure the straightness of the work surface of a workpiece and perform appropriate polishing.

"Means for Solving the Problems" What is the gist of the present invention to achieve these objects?

The supplied polishing film is wrapped around a hard roller, and the wrapped portion is pressed against a soft workpiece,
A super-finishing device that polishes a workpiece by vibrating the roller in the axial direction and winding up the used polishing film, the apparatus comprising: a vibrating head that vibrates the roller in the axial direction; The present invention resides in a super-finishing device characterized by being provided with friction holding means for sandwiching and holding the polishing film on the supply side and the polishing film on the winding side by frictional force.

``Operation'' Since the roller is made of a hard material, the straightness of the surface to be worked on during vibration polishing can be ensured.

In addition, due to the friction holding means, during vibration polishing of a soft workpiece, the polishing film comes into close contact with the hard roller, and the contact resistance between the roller and the polishing film increases and becomes greater than the polishing resistance of the workpiece, causing the polishing film to shift from the roller. Since the vibration motions coincide without any deviation, the effect of vibration polishing, which has no directionality on the finished surface, can be maintained.

"Embodiment" The basic configuration of a superfinishing apparatus in an embodiment of the present invention will be described below with reference to FIGS. 8 and 9.

As shown in FIGS. 8 and 9, a supply spool 37 is rotatably connected to the main frame 46 by a rolling shaft 38, and a take-up spool 36 is rotatably connected to the main body frame 46 by a drive shaft 39. ing. A polishing film 40 is wound around a take-up spool 36 via guide rollers 22, 23, 24° 25, and a belt gear 3 fixed to a drive shaft 39.
A toothed belt 34 is wound around the polishing film 5 and the motor 33 side, and the polishing film 40 is wound up by the motor 33 at a low speed.

4 installed between the main body frame 46 and the shaft end fixing plate 47
Wooden guide shafts 27.28, 29.30.

A vibrating head frame 26 is supported so as to be movable in the axial direction. At the center of the vibrating head frame 26, a pneumatic cylinder 31. The piston rod connecting fitting 32 and the contact roller mounting are connected with the movable fitting 21, and the contact hole 20 is protruded a predetermined distance by air pressure, and the distance from the work surface and the pressing state are automatically adjusted. It is designed to be adjusted to

A vibration drive motor 41 is placed facing downward on the upper plate of the main body frame 46 and is connected to an intermediate shaft 43 via a coupling 42. The lower shaft end of the intermediate shaft 43 is an eccentric shaft, and the connecting culm 44 is fitted on the outside. The connecting culm 44 and a connecting fitting 45 attached to the side surface of the vibrating head frame 26 are connected by pins, so that the vibrating head frame 2
6 is driven to vibrate, and the contact roller 20 is also configured to vibrate.

In the above-mentioned super-finishing apparatus, as explained in FIG. 11, the base plate of the main body frame 46 is fixed to the cross slide of the lathe table (not shown), and the workpiece W is rotated by the lathe, so it is an accessory tool of the lathe. Or, it will be made into a special machine for mass production.

Next, the characteristic structure of the superfinishing apparatus according to the embodiment of the present invention will be explained based on FIGS. 1 to 7.

1 to 5 show a first embodiment of the present invention.

The superfinishing apparatus according to the first embodiment has the basic structure described above with reference to FIGS. 8 and 9, but the vicinity of the contact roller 20 has been modified.

That is, as shown in FIG.
3, 24, and 25, and is wound around a take-up spool 36, and a contact roller 50 is attached to a movable metal fitting 53.

The contact roller 50 is a so-called rigid body made of metal for the purpose of supporting the polishing film 40 in a straight manner.

As shown in FIG. 4, the movable metal fitting 53 has a U-shaped arm portion, and a contact roller 50 is rotatably supported by the arm portion, and the contact roller 50 has a predetermined movement range.

As shown in FIG. 1, the arm portion of the movable metal fitting 53 is formed in a single character shape, and U-shaped notch grooves 53c and 53d are carved in each end of the vertically projecting arms 53a and 53b. ing. The notches 51a at both ends of the push roller 51 are fitted into the cut grooves 53c, and the notches 52a at both ends of the push roller 52 are fitted into the cut grooves 53d.

The push rollers 51 and 52 are thereby supported, and a margin for movement of the contact roller 50 toward the center is provided.

As shown in FIGS. 1 to 4, the push rollers 51 and 52 are inserted from above and below, and the common pin bolts 57 are passed through the holes 51b and 52b for end attachment, and the push rollers 51 and 52 are inserted from the top and bottom.
A compression spring 54 that urges the contact roller 52 toward the center of the contact roller 50 is assembled with a washer 55 and a thumbscrew 56.

As shown in FIG. 5, each of the push rollers 51 and 52 has a cylindrical body and an elastic body such as rubber is fitted onto the outside of the body.

That is, the friction holding means is formed by a compression spring 54 urging the push rollers 51 and 52 toward the center of the contact roller 50.

Next, the effect will be explained.

As shown in FIG. 1, the polishing film 40 is wound around the contact roller 5o, pressed against the workpiece W rotating clockwise, vibrated in the axial direction of the contact roller 5o, and wound and polished in the direction of the arrow.

Since the contact roller 50 is made of a hard material, the straightness of the surface can be maintained even during vibration polishing of a soft work surface, and a vibration effect, that is, a non-directional finished surface can be obtained.

During polishing, the push rollers 51 and 52 are pressed against the contact roller 50, and then the polishing film 40 is
During this period, the polishing film 4o, which is sandwiched between the contact rollers 50 and 50 and passing through the contact roller 50 in a semicircular manner, is in close contact with the completely hard contact roller 5o, and the contact resistance between the contact roller 50 and the polishing film 4o increases, and the workpiece W is The polishing resistance force becomes larger than the polishing resistance force, and the polishing film 40 is not drawn toward the contact roller 50 during vibration polishing of the workpiece W, and the effect of vibration polishing without directionality on the finished surface can be maintained.

The winding force of the polishing film 40 is slightly increased by providing the push rollers 51, 52, and can be increased or decreased by adjusting the compression spring 54.

6 and 7 show a second embodiment of the invention.

The difference from the super-finishing apparatus according to the first embodiment lies in the friction holding means, and the polishing film 40 on the supply side is moved between the guide rollers 22 and 22.
Press the pressing roller 61 and press the polishing film 4 on the winding side.
0 is held down by the guide roller 23 and the push roller 62.

The side plate 67 of the vibrating head has projecting portions 67a and 67a extending vertically from positions corresponding to the guide rollers 22 and 23, respectively.
67b is formed, and a 0-shaped notch @67c is formed in the overhanging portions 67a and 67b.

The notches 61a at both ends of the push roller 61 are fitted into the cut grooves 67c, and the notches 62 at both ends of the push roller 62 are fitted into the cut grooves 67d.
A is fitted.

A compression spring 65 is attached to the guide roller 22 with a pin bolt 64 and a thumb screw 66 to press the push roller 61, and similarly, a compression spring 65 or a pin bolt 64 and a thumb screw are attached to the guide roller 23 to press the push roller 62. 66
It is installed with.

The push rollers 61 and 62 are adjusted separately. The contact roller 60 is attached to a movable holding fitting 63 and is a so-called rigid body made of metal.

Thereby, during winding and vibration operation, the contact roller 60 and the polishing film 4° are always kept in close contact with each other by the pair of push rollers 61 and 62.

"Effects of the Invention" According to the super-finishing device of the present invention, it is possible to ensure straightness in super-finishing a soft workpiece, and to obtain a non-directional finished surface in vibration polishing, thereby producing a product of a predetermined quality. can be obtained stably.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a partial side view showing the vicinity of the contact roller, and FIG.
The figure is also a partial front view, and Figure 3 is a side view of the super finishing equipment.
FIG. 4 is a partial plan view showing the vicinity of the contact roller, FIG. 5 is a detailed sectional view of the push roller, FIGS. 6 and 7 are a second embodiment of the present invention, and FIG. 6 is a contact roller. FIG. 7 is a partial front view of the rollers, FIG. 7 is a partial front view of the roller, and FIGS. 8 and 9 show the basic configuration of this embodiment. FIG. 8 is a side view of the superfinishing device. FIG. 9 is a front view, and FIGS. 10 and 11 are explanatory diagrams of a conventional superfinishing apparatus. W...Work 12.20,50.60...Contact roller 10.
36... Take-up spool 4.37-- Supply spool 2.5.40-... Polishing film 51.52, 61.62-... Push roller Fig. 3 Fig. 4 Fig. 5

Claims (1)

[Claims] The supplied polishing film is wound around a hard roller, and the wound portion is pressed against a soft workpiece,
A super-finishing device that polishes a workpiece by vibrating the roller in the axial direction and winding up the used polishing film, the apparatus comprising: a vibrating head that vibrates the roller in the axial direction; A super-finishing device characterized by being provided with frictional holding means for sandwiching and holding the polishing film on the supply side and the polishing film on the winding side using frictional force.