JPH1044012A - O ring deburring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an O ring deburring device capable of simply and assuredly deburring inner and outer burrs stuck on the O ring. SOLUTION: This O ring debarring device is provided with a large pulley 2 and a small pulley 3, an inner burr grinding stone material 4 arranged on the inner circumference of the O ring 1, and an outer burr grinding stone member 5 arranged on the outer circumference of the O ring 1. The small pulley 3 includes a V shape or a U shape circumferential groove on its outer circumference of fitting the O ring and the large pulley 2 has its outer circumferential cross section made linearly. The O ring 1is fitted into the circumferential groove on the small pulley 3 and locked to the outer circumference of the large pulley 2 with its inner burr faced toward the inner circumferential side and the outer burr locked toward the outer circumferential side. The I ring 1 is run endlessly under this condition and the inner and the outer burrs are cut by the inner and the outer burr grinding stones 4, 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an O-ring deburring apparatus for removing inner burrs formed on the inner peripheral side of an O-ring and outer burrs formed on the outer peripheral side.

[0002]

2. Description of the Related Art As shown in FIG. 10, an O-ring a is formed by forming a rubber elastic body wire b having a circular cross section into a ring shape, and is shielded by being inserted into a bearing portion to which pressure is applied. Used as a material. This O-ring a is generally manufactured by sandwiching a material on a sheet between upper and lower molds, and immediately after this forming, as shown in FIGS. An outer burr c and an inner burr d are respectively formed on the outer peripheral side and the inner peripheral side of the element wire b.
Since such burrs c and d are in the form of a thin film, most of them can be easily peeled off. However, if the burrs c and d that have spread greatly are simply removed by hand, small burrs c and d of less than 1 mm may remain on the inner and outer peripheries of the strand b. Then, in the shield portion to which pressure is applied, even such small burrs c and d may possibly hinder the sealing, so that it is necessary to completely remove these burrs.

[0003] Ordinary O-ring a used for general industry
The burrs c and d can be completely removed by applying a strong impact in a state where the burrs c and d are sufficiently hardened by being frozen once after production. However, such a method of freezing the O-ring a deteriorates the material on the surface of the strand b by the freezing process, and therefore cannot be used for the O-ring a for precision equipment used in an aircraft or the like. . Therefore, in the conventional O-ring a for precision equipment, the outer burr c or the inner burr d is manually removed by a skilled worker using a luter (grinder). That is, the worker slides the inner and outer peripheral surfaces of the O-rings a with the rotating grindstone surface of the luter while a large number of the O-rings a are fitted to the fingers. Then, a delicate friction is generated between the finger and the O-ring a, and a difference in peripheral speed is generated between the O-ring a and the grindstone surface. The inner burr d on the inner peripheral side was removed by grinding.

[0004]

However, the method of removing the outer burrs c and the inner burrs d by the above manual work is not only extremely delicate and requires a high level of skill, but also is inefficient and troublesome for a skilled worker. Therefore, there has been a problem that poor productivity in the step of removing the outer burrs c and the inner burrs d is an obstacle to cost reduction of products. In addition, in this manual operation, talc is attached to a finger in order to generate appropriate friction between the O-ring a and the talc. Therefore, a cleaning step for removing talc attached to the O-ring a is newly added. There was also a problem that talc that became necessary or was scattered during work deteriorated the work environment.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an O-ring deburring apparatus which can easily and surely remove burrs inside and outside an O-ring.

[0006]

In order to achieve the above-mentioned object, an O-ring deburring apparatus according to the present invention has an inner burr of an O-ring directed toward an inner peripheral side and an outer burr of the O-ring. A large / small pulley that is hung in a state directed toward the outer periphery to make the O-ring run endlessly, an inner burr grindstone member disposed on the inner periphery of the O-ring, and an outer periphery of the O-ring And an outer burr grindstone member disposed on the
A V-shaped or U-shaped peripheral groove into which the O-ring is fitted is provided on the outer peripheral surface of the small pulley, and the cross-sectional shape of the outer peripheral surface of the large pulley is linear. In this case, it is preferable that the outer diameter of the large pulley be approximately twice the outer diameter of the small pulley.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a simplified view of an O-ring deburring device according to the present invention. The deburring device includes large and small pulleys 2 and 3 on which an O-ring 1 is mounted, and a state of being mounted on the large and small pulleys 2 and 3. The O-ring 1 includes an inner burr grinding wheel member 4 disposed on the inner peripheral side and an outer burr grinding wheel member 5 disposed on the outer peripheral side of the O-ring 1.

As shown in FIG. 2, the small pulley 3 is provided with a V-shaped or U-shaped peripheral groove 7 on the outer peripheral surface 6 thereof, and the O-ring 1 is fitted into the peripheral groove 7. As shown in FIG. 3, the large pulley 2 has a linear outer peripheral surface 8 having a linear cross section, and the O-ring 1 is engaged with the outer peripheral surface 8.
In this case, the large and small pulleys 2 and 3 are arranged on the same vertical plane. Further, the outer diameter of the large pulley 2 is about twice as large as the outer diameter of the small pulley 3, but is not limited to this.

The O-ring 1 is mounted on the large and small pulleys 2 and 3 such that the burrs 1a (see FIG. 5 and the like) are directed toward the inner periphery and the outer burrs 1b (see FIG. 5 and the like) are directed toward the outer periphery. Can be hung. In this case, the large pulley 2 is the driving side, and the small pulley 3 is the driven side. That is, the large pulley 2 is rotated by a driving device (not shown), whereby the O-ring 1 runs endlessly along the large and small pulleys 2 and 3.

The circumferential groove 7 of the small pulley 3 is for preventing the O-ring 1 from meandering during traveling.
As shown in FIG. 4, not only the O-ring but also a belt 16 (a flat belt or the like) hung on a plurality of pulleys 15 tends to climb to the large diameter side. However, due to the relationship between the tension of the belt 16 and the friction between the pulley 15 and the belt 16, if the climbing limit is exceeded, the O-ring 1 and the like will roll to the original position. Further, in the case where the cross-sectional shape of the outer peripheral surface 8 is linear like the large pulley 2, the O-ring 1
Etc. do not roll and maintain their original state.

That is, according to the present invention, there are two different characteristics.
By combining the types of pulleys, the O-ring 1 can be run endlessly with little meandering and no rolling.

The inner burr grindstone member 4 and the outer burr grindstone member 5 are each formed of a disk, and in the case of the inner burr grindstone member 4, the inner burr of the O-ring 1 on the large pulley 2 side. The O-ring 1 is disposed near the O-ring 1 by a drive mechanism (not shown), and the inner burr 1a of the running O-ring 1 is polished by a rotational drive around the axis as shown in FIG. In the case of the outer burr grindstone member 5, it is disposed on the outer peripheral side of the O-ring 1 on the side of the large pulley 2, and approaches and separates from the O-ring 1 by a drive mechanism (not shown). And FIG.
As shown in (1), the outer burr 1b of the running O-ring 1 can be polished (cut) by the rotational drive about the axis.

Next, a method of removing the inner and outer burrs 1a and 1b adhered to the O-ring 1 by using the burr removing device having the above-described structure will be described. As shown in FIG. 1, the O-ring 1 is hung on the large pulley 2 and the small pulley 3. In this case, the inner burr 1a is directed toward the inner periphery and the outer burr 1b is directed toward the outer periphery. Then, after the inner and outer burr grinding stone members 4 and 5 are brought into contact with the burrs 1 a and 1 b of the O-ring 1, respectively, the large pulley 2 is rotationally driven to move the O-ring 1 as shown by arrows A in FIGS. 6 and 7. And run.

At this time, the rotation of each of the inner and outer burr grinding stone members 4 and 5 is set to a free state, and the inner and outer burr grinding stone members 4 and 5 are rotated by the frictional force with the O-ring 1. In other words, the peripheral speed (rotation speed) of the O-ring 1 and the peripheral speed (rotation speed) of each of the inner and outer burr grinding stone members 4 and 5 are matched. At this time, the peripheral speed of the O-ring 1 is set to, for example, about 50 m / min.

Thereafter, rotational power is applied to each of the inner and outer burr grinding stone members 4 and 5 to increase the peripheral speed to a predetermined peripheral speed (for example, 500 m / min).
a, 1b is polished (cut). That is, the speed obtained by subtracting the peripheral speed of the O-ring 1 from the peripheral speed of the grindstone members 4 and 5 is the polishing (cutting) speed.

When the deburring is completed, on the contrary, first, the rotational drive of the grindstone members 4 and 5 is stopped, and the grindstone members 4 and 5 are set in a free state. That is, the peripheral speed of the grindstone members 4 and 5 is made to match the peripheral speed of the O-ring 1. After that, the rotation of the large pulley 2 is stopped to stop the running of the O-ring 1, and the grindstone members 4 and 5 are separated from the O-ring 1, so that the O-ring 1
Is removed from the large and small pulleys 2 and 3, the deburring operation of the O-ring 1 is completed.

Therefore, the inner and outer burrs 1 are formed by the above-described method.
If a and 1b are polished, the O-ring 1 can travel along the small and large pulleys 2 and 3 without meandering and rolling during polishing (cutting).
b can be reliably removed. Moreover, FIG.
The biting portion 9 as shown in (b) is not formed on the O-ring 1. On the other hand, when the rotating grindstone members 4 and 5 are brought into contact with the running O-ring 1, the flash 1
The surface of the O-ring 1 other than a and 1b was cut, and FIG.
(A) The biting portion 9 as shown in (B) is formed.

Further, in order to further prevent the formation of the biting portion 9, the grindstone members 4 and 5 may be as shown in FIG. In this case, the grindstone members 4 and 5 are composed of a grindstone main body 11 having a semicircular concave circumferential groove 10 formed on the outer peripheral surface thereof and the grindstone main body 11.
Abrasive 12 buried in the bottom of the concave circumferential groove 10.
Therefore, in the case of the inner burr grinding stone member 4, the O on the large pulley 2 side
It is arranged on the inner peripheral side of the ring 1 and is driven to rotate around its axis, so that the inner peripheral portion of the running O-ring 1 is fitted into the concave peripheral groove 10 and the inner burr 1a is polished. Polishing (cutting) with material 12
In the case of the outer burr grindstone member 5, the outer burr member is disposed on the outer peripheral side of the O-ring 1 on the side of the large pulley 2, and is driven to rotate about its axis, so that the outer peripheral portion of the running O-ring 1 is moved. Is concave circumferential groove
The outer burr 1b can be polished (cut) by the abrasive material 12 by being fitted to the shape 10.

That is, the axial length L of the exposed abrasive 12 is set substantially equal to the axial length of the burrs 1a and 1b, and the range L ₁ and L _{2 on} both sides of the abrasive 12 Accordingly, the burrs 1a and 1b are surely cut, and the surface of the O-ring 1 other than the burrs 1a and 1b is not cut.

However, the tension of the O-ring 1 is O
It can be changed by changing the material of the ring 1, the wire diameter, the circumference, and the like, or by changing the distance between the pulleys 2 and 3 between the shafts. If the tension is large, the peripheral groove 7 of the small pulley 3 rolls up the O-ring 1 and falls down, and the burrs 1a and 1b cannot be reliably cut. Conversely, if the tension is small, the O-ring 1 Therefore, the tension of the O-ring 1 needs to be set to an appropriate value in consideration of the above-mentioned materials and the like.

The sizes of the large and small pulleys 2 and 3 and the distance between the axes of the large and small pulleys 2 and 3 can be changed. By changing these, the O-rings 1 of various sizes can be changed.
The inner and outer burrs 1a and 1b can be polished (cut). Further, by combining this deburring device and an automatic O-ring supply device, it is possible to achieve completely unmanned O-ring production.

[0022]

Since the present invention is configured as described above, the following effects can be obtained.

The inner burr 1a and the outer burr 1b can be removed at the same time. During polishing (cutting), the O-ring 1 can travel along the small and large pulleys 2 and 3 without meandering and rolling, and the inner and outer burrs 1a and 1b can be reliably removed. That is, the surface of the O-ring 1 other than the burrs is not cut, and the burrs removing operation is stabilized. Since nitrogen gas is not used unlike a frozen deburring machine,
Running costs can be significantly reduced. In particular, according to the O-ring deburring apparatus of claim 2, meandering and rolling of the O-ring 1 can be reliably prevented,
Burrs can be removed with high accuracy.

[Brief description of the drawings]

FIG. 1 is a simplified diagram of an apparatus for removing burrs of an O-ring according to the present invention.

FIG. 2 is a sectional view of a small pulley.

FIG. 3 is a sectional view of a large pulley.

FIG. 4 is an operation explanatory view.

FIG. 5 is an explanatory view of the direction of burrs.

FIG. 6 is an explanatory diagram of a burr polishing state.

FIG. 7 is an explanatory diagram of a burr polishing state.

FIG. 8 is an explanatory view of a biting portion.

FIG. 9 is a sectional view of a main part of another grindstone member.

FIG. 10 is a perspective view of an O-ring.

FIG. 11 is a perspective view of an O-ring with burrs attached.

FIG. 12 is a cross-sectional view of an O-ring with burrs attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 O-ring 1a Inner burr 1b Outer burr 2 Large pulley 3 Small pulley 4 Inner burr grindstone member 5 Outer burr grindstone member 6 Outer peripheral surface 7 Peripheral groove 8 Outer peripheral surface

Claims (2)

[Claims] 1. Large and small pulleys which are hung in a state where inner burrs of an O-ring are directed to an inner peripheral side and outer burrs of the O-ring are directed to an outer peripheral side, and which run the O-ring endlessly. An inner burr grinding wheel member disposed on the inner periphery side of the O-ring; and an outer burr grinding wheel member disposed on the outer periphery side of the O-ring. A V-shaped or U-shaped peripheral groove in which the large pulley is fitted, and a cross-sectional shape of an outer peripheral surface of the large pulley is linear. 2. The O-ring deburring device according to claim 1, wherein the outer diameter of the large pulley is about twice as large as the outer diameter of the small pulley.