JP3517060B2 - O-ring deburring - Google Patents

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 method for removing burrs formed on the inner and outer peripheral sides of an O-ring.

[0002]

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

Ordinary O-ring a used for general industry
After manufacturing, the flashes c and d can be completely removed by freezing them once and then applying a strong impact in a state where the flashes c and d are sufficiently hardened. However, such a method of refrigerating the O-ring a causes deterioration of the material of the surface of the wire b in the refrigerating process, and therefore cannot be adopted in the O-ring a for precision equipment used in aircraft and the like. . Therefore, in the conventional O-ring a for precision instruments, the outer burr c or the inner burr d is manually removed by a skilled worker using a lute (grinder). That is, the worker slides the inner and outer peripheral surfaces of the O-ring a on the rotating whetstone surface of the lute while fitting a large number of O-rings a on the finger. Then, a slight 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, so that the outer burr c on the outer peripheral side of the O ring a or The inner burr d on the inner peripheral side was removed by grinding.

[0004]

However, the above-mentioned method of removing the outer burr c and the inner burr d by hand is extremely delicate and requires a high degree of skill, and is also inefficient and troublesome for a skilled worker. Therefore, there has been a problem that poor productivity in the removal process of the outer burr c and the inner burr d hinders cost reduction of the product. Moreover, in this manual work, since the talc is attached to the finger in order to generate an appropriate friction with the O-ring a, the cleaning process for removing the talc adhering to the O-ring a is newly added. There was also a problem that talc that was needed or scattered during work deteriorates the work environment. In addition, the O-ring surface other than the burr may be cut, resulting in deterioration of quality.

The present invention has been made in view of such circumstances, and it is possible to surely remove the burr of the O-ring without manual work and without cutting the surface of the O-ring other than the burr. It is intended to provide a method for removing burr on a ring.

[0006]

In order to achieve the above object, a method for removing burrs of an O-ring according to the present invention is applied to an outer peripheral surface.
With a pulley that has a circumferential groove in the
An O-ring is hung on the pulley, and the O-ring travels endlessly and is rotatable, while the inner burr grindstone member and outer bar are rotatable.
A method for removing burrs on an O-ring for removing burrs on an inner circumference and an outer circumference with a grinding wheel member for re- grinding, wherein the above-mentioned inner burrs grinding tool
The stone member and the grindstone member for the outer burr are spread over the inner circumference of the O-ring.
And the outer peripheral burr, and then the O-ring is run endlessly, and one of the above pulleys having a peripheral groove on the outer peripheral surface.
The cross-sectional shape of the outer peripheral surface while preventing the O-ring from meandering by
Is the linear one of the above-mentioned pulleys,
Preventing, when said O-ring has reached a predetermined rotational speed, the
The inner burr polishing with the O-ring kept at the predetermined number of revolutions.
A predetermined rotational power is applied to the stone member and the outer burr grindstone member to remove the burr. At this time, the O
It is preferable to use a grindstone member made up of a grindstone body having a concave circumferential groove in which a part of the ring is fitted, and an abrasive provided at the bottom of the concave circumferential groove of the grindstone body corresponding to the burr. .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view of a deburring device used in the method for removing deburring of an O-ring according to the present invention. This deburring device includes large and small pulleys 2 and 3 on which an O-ring 1 is hung, and large and small pulleys 2 and 3. O in the state of being hung on
An inner burr grindstone member 4 disposed on the inner peripheral side of the ring 1,
Grinding stone member 5 for outer burr arranged on the outer peripheral side of the O-ring 1.
And

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

The O-ring 1 is attached to the large and small pulleys 2, 3 such that the inner burr 1a (see FIG. 5 etc.) of the O-ring 1 is directed toward the inner peripheral side and the outer burr 1b (see FIG. 5 etc.) thereof is directed toward the outer peripheral side. Can be hung. In this case, the large pulley 2 is the driving side and the small pulley 3 side is the driven side. That is, the large pulley 2 is rotated by a drive device (not shown), so that the O-ring 1 runs endlessly along the large and small pulleys 2 and 3.

By the way, the peripheral groove 7 of the small pulley 3 is for preventing the O-ring 1 from meandering during traveling, but in general,
As shown in FIG. 4, not only the O-ring but also a plurality of pulleys 15
The belt 16 (flat belt, etc.) hung on is trying to climb to the large diameter side. However, the tension of the belt 16 and the pulley 15
Due to the relationship between the friction between the belt 16 and the belt 16, if the climbing limit is exceeded, it will slide down to the original position, resulting in rolling of the O-ring 1 and the like. If the outer peripheral surface 8 of the large pulley 2 has a linear cross-section, the O-ring 1 and the like do not roll and retain the original state.

Therefore, as described above, by combining two types of pulleys having different properties, the O-ring 1 is endless in a state where there is little meandering and no rolling.
Can be driven.

However, the inner burr grindstone member 4 and the outer burr grindstone member 5 are each formed of a disk body. In the case of the inner burr grindstone member 4, the inner burr grindstone member 4 is provided on the inner peripheral side of the O-ring 1 on the large pulley 2 side. The inner burr 1a of the running O-ring 1 is polished by the drive mechanism (not shown) that moves closer to and away from the O-ring 1 and is driven to rotate about its axis as shown in FIG. In the case of the outer burr grindstone member 5, the outer burr grindstone member 5 is disposed on the outer peripheral side of the O-ring 1 on the side of the large pulley 2 and is moved toward and away from the O-ring 1 by a drive mechanism (not shown). Then, Fig. 7
As shown in FIG. 4, the outer burr 1b of the running O-ring 1 can be polished (cut) by the rotational drive around the axis.

Next, a method of removing the inner and outer burrs 1a and 1b attached to the O-ring 1 by using the burr removing device configured as described above will be described. As shown in FIG. 1, the O-ring 1 is hooked on the large pulley 2 and the small pulley 3. In this case, the inner burr 1a
To the inner peripheral side and the outer burr 1b to the outer peripheral side.
The inner and outer burr grindstone members 4 and 5 are brought into contact with the burrs 1a and 1b of the O-ring 1, respectively, and then the large pulley 2 is rotationally driven to move the O-ring 1 as shown by an arrow A in FIGS. 6 and 7. , Run.

At this time, the inner and outer burr grindstone members 4, 5 are set in a free state, and the inner and outer burr grindstone members 4, 5 are rotated by the frictional force with the O-ring 1. That is, the peripheral speed (rotation speed) of the O-ring 1 and the peripheral speed (rotation speed) of each of the inner and outer burr grindstone members 4, 5 are made to match. 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 grindstone members 4 and 5 to raise the peripheral speed to a predetermined peripheral speed (for example, 500 m / min), and the inner and outer burr grindstone members 4 and 5 are used.
Polish (cut) a and 1b. That is, the speed obtained by subtracting the peripheral speed of the O-ring 1 from the peripheral speed of the grindstone members 4, 5 becomes the polishing (cutting) speed.

When the removal of burrs is completed, conversely, first, the rotational driving of the grindstone members 4, 5 is stopped to bring the grindstone members 4, 5 into a free state. That is, the peripheral speed of the grindstone members 4, 5 is made to match the peripheral speed of the O-ring 1. After that, the rotation drive of the large pulley 2 is stopped to stop the traveling of the O-ring 1, the grindstone members 4, 5 are separated from the O-ring 1, and the O-ring 1
By removing from the large and small pulleys 2, 3, the deburring work of the O-ring 1 is completed.

Therefore, the inner and outer burrs 1 are formed by the method as described above.
By polishing a and 1b, the O-ring 1 can run along the large and small pulleys 2 and 3 without causing meandering and rolling during polishing (cutting).
b can be reliably removed. Moreover, FIG. 8 (a)
The biting part 9 as shown in (b) is not formed in the O-ring 1. On the other hand, if the whetstone members 4 and 5 that are rotationally driven are brought into contact with the running O-ring 1, the burr 1
By cutting the surface of the O-ring 1 other than a and 1b, as shown in FIG.
(B) The biting portion 9 as shown in (B) is formed.

However, in order to prevent the formation of the bite portion 9, the grindstone members 4 and 5 may be those as shown in FIG. In this case, the grindstone members 4 and 5 include a grindstone body 11 having a semicircular concave circumferential groove 10 formed on the outer peripheral surface thereof, and an abrasive material 12 embedded in the bottom portion of the concave circumferential groove 10 of the grindstone body 11, Consists of. Therefore, in the case of the grindstone member 4 for the inner burr, it is arranged on the inner peripheral side of the O-ring 1 on the large pulley 2 side, and is driven to rotate about its axis, so that the inner peripheral portion of the O-ring 1 running is In the case of the outer peripheral side of the O-ring 1 on the side of the large pulley 2 in the case of the grindstone member 5 for the outer burr, the inner burr 1a can be ground (cut) with the abrasive 12 so as to fit into the concave peripheral groove 10. The outer peripheral portion of the running O-ring 1 is fitted into the concave circumferential groove 10 so that the outer burr 1b is ground (cut by an abrasive material 12). )can do.

That is, the axial length L of the exposed abrasive material 12 is set to be substantially the same as the axial length of the burrs 1a and 1b, and the ranges L ₁ and L _{2 on} both sides of the abrasive material 12 are guide portions. As a result, 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 circumferential length, etc., and by changing the axial distance between the pulleys 2 and 3. If the tension is large, the peripheral groove 7 of the small pulley 3 rolls down the O-ring 1 to roll down the burrs 1a and 1b, and if the tension is small, the O-ring 1 However, the tension of the O-ring 1 must be set to an appropriate value in consideration of the above materials and the like.

The sizes of the large and small pulleys 2 and 3 and the axial distance between the large and small pulleys 2 and 3 can be changed. By changing these, the O-ring 1 having various sizes can be changed.
The inner and outer burrs 1a and 1b can be polished (cut). Further, if this burr removing device is combined with an automatic O-ring supplying device, it is possible to achieve complete unmanned production of the O-ring.

[0022]

Since the present invention is configured as described above, it has the following effects.

It is possible to prevent the deburring start portion and the deburring end portion from being cut into the grindstone member by cutting, and to reliably remove only the burrs. Only the burr can be removed, the O-ring surface other than the burr is not scratched, and the burr removal work is stable. In particular, claim 2
According to the described burr removal method, it is possible to reliably prevent excessive scraping of the O-ring surface. 2 with different properties
A type of pulley (a pulley 3 having a peripheral groove 7 on the outer peripheral surface 6,
The outer peripheral surface 8 is combined with a pulley 2 having a linear sectional shape)
By making it possible, there is little meandering and no rolling
You can run the O-ring 1 endlessly with
It Therefore, be sure to remove the inner and outer burrs 1a and 1b.
You can

[Brief description of drawings]

FIG. 1 is a simplified diagram of a deburring device used in a method 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 diagram of a biting part.

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 the O-ring with burrs attached.

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

[Explanation of symbols]

1 O-ring 4 Whetstone member 5 Grindstone member 10 concave groove 11 Grindstone member 12 Abrasive

Claims (2)

(57) [Claims] 1. A pulley having a peripheral groove on its outer peripheral surface, and an outer peripheral surface.
Put an O-ring on the pulley whose cross section is straight,
Inner freely rotate while running the O-ring in an endless shape
A O-ring burr removing method for removing <br/> burrs inner and outer circumference with burr grinding wheel member and the outer burr grindstone member, the inner burr grinding wheel member and the outer burr stone free state After the member is brought into contact with the burrs on the inner and outer peripheries of the O-ring, the O-ring is made to run endlessly and a peripheral groove is formed on the outer peripheral surface.
One of the above pulleys prevents the O-ring from meandering.
On the other hand, the other pulley with the outer peripheral surface having a linear cross-sectional shape is
The O-ring is prevented from rolling, and when the O-ring reaches a predetermined number of revolutions, the inner burr grindstone member and the outer burr grindstone member are kept in predetermined positions while maintaining the predetermined number of revolutions of the O-ring. A method for removing burrs from an O-ring, which comprises removing the burrs by applying the rotational power of 1. 2. A grindstone main body having a concave circumferential groove in which a part of an O-ring is fitted on the outer peripheral surface, and an abrasive provided at the bottom of the concave circumferential groove of the grindstone main body in correspondence with burrs. The method for removing burrs from an O-ring according to claim 1, wherein a grindstone member is used.