JPH0775968A - Belt sleeve polishing method - Google Patents

Abstract

PURPOSE:To provide a belt sleeve polishing method removing polished powder liable to stick to the surface of a belt sleeve. CONSTITUTION:In this belt sleeve polishing method, a cylindrical vulcanized belt sleeve 8 with a conductor embedded in a rubber layer is stretched over a drive roller 10 and a driven roller 11 and made travel under the specified tension. A polishing wheel 12 put in rotation is brought into contact with the traveling belt sleeve 8 so as to polish to form a groove part on the surface of the belt sleeve 8. A rotary brush 15 is brought into contact with the belt sleeve 8 and rotated at the same time. Polished powder stuck to the belt sleeve 8 after polishing is thereby removed and moreover discharged outside by a suction part 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt sleeve polishing method, and more particularly to a belt sleeve polishing method for polishing a running belt sleeve with a polishing wheel and removing abrasive powder adhering to the belt sleeve. It is about.

[0002]

2. Description of the Related Art A conventional V-ribbed belt is obtained by vulcanizing a reverse molded body obtained by laminating canvas, an upper rubber layer, a tensile member and a lower rubber layer on a mandrel as shown in Japanese Patent Publication No. 5217552. The obtained vulcanizing sleeve was manufactured by a grinder method in which a plurality of V-shaped grooves were ground by a grinding wheel in which a cylindrical surface portion and a portion having a plurality of V-shaped grooves were connected and integrated.

Further, recently, in a long V-ribbed belt, a vulcanized belt sleeve is hung on a driving roll and a driven roll to run, and the surface of the running belt sleeve is V-shaped by a grinding wheel having a diamond mounted on the surface. It was manufactured by a method of polishing in a groove shape. A belt sleeve in which short fibers made of synthetic fibers such as nylon fibers and aramid fibers are arranged in the rubber in the width direction has been used.

[0004]

However, according to the prior art, since the belt sleeve is conventionally ground in the air by a grinding wheel, the ground surface of the belt sleeve after grinding has V-shaped groove bottoms (rib valleys) or ribs. There is a problem in that the polishing residue remains attached to the surface of the mountain portion or is not completely polished and remains fixed on the belt sleeve surface. When a V-ribbed belt obtained from a belt sleeve to which such polishing powder or polishing dust is attached is mounted on each pulley of an accessory drive device of an automobile and run, noise is generated due to the polishing powder or polishing dust. was there. Moreover, the polishing powder and the polishing dust attached to the rib valleys were not removed from the belt when the belt was mounted on the pulley and run.

Therefore, in the final step, the operator manually brushes the belt sleeve or the V-ribbed belt cut into a predetermined width, or suctions with a vacuum to remove the polishing powder, but especially the bottom of the V-shaped groove. It took time and effort to remove the polishing powder adhering to the vicinity. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of polishing a belt sleeve that removes abrasive powder that tends to adhere to the surface of the belt sleeve.

[0006]

That is, the feature of the present invention which meets the above-mentioned object is to hang a cylindrical vulcanized belt sleeve having a core wire embedded in a rubber layer on a driving roll and a driven roll. In the belt sleeve polishing method, in which a grooved portion is polished on the surface of the belt sleeve by bringing the rotated polishing wheel into contact with the running belt sleeve under a predetermined tension, There is a method of polishing a belt sleeve in which the polishing powder adhered to the belt sleeve after polishing is removed by contacting with the sleeve and rotating at the same time, and the polishing powder is discharged to the outside by suction.

[0007]

In the method of polishing a belt sleeve according to the present invention, the polishing powder adhered to the surface of the belt sleeve after polishing and the polishing residue left fixed on the surface of the belt sleeve are removed by a rotating brush and immediately discharged to the outside by suction. Therefore, the remaining amount of the polishing powder adhering to the surface of the belt sleeve is greatly reduced. In particular, since the rotary brush penetrates evenly into the rib valleys and rib peaks, which are difficult to remove, the polishing powder adhering thereto can be easily and easily removed.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partial sectional view of a belt sleeve used in the present invention.
A tensile layer 3 around which a plurality of cover canvases 2 are wound, a cushion rubber layer 4, a core wire 5 made of a rope spirally wound around the layer 4, and a compression rubber layer 6 are sequentially laminated. This laminate is vulcanized to form the belt sleeve 8. The compressed rubber layer 6 is made of aramid fiber, polyester fiber, nylon fiber, cotton or the like and has a length of 1 to 10
1 to 15 vol% of cut fibers of mm are mixed and arranged in the width direction of the belt sleeve 8.

The belt sleeve 8 is ground by a grinding wheel 12 as shown in FIG. That is, the belt sleeve 8 is hung on the driving roll 10 and the driven roll 11 so that the compressed rubber layer 6 is located on the surface side and runs under a predetermined tension. The traveling speed of the belt sleeve 8 is not particularly limited. Further, the rotating grinding wheel 12 is disposed on the driving roll 10 or the driven roll 11 side, and moves so as to come into contact with the running belt sleeve 8 and a plurality of grooves of 3 to 100 grooves are formed on the surface of the belt sleeve 8. The profile 9 is polished at once. The rotation direction of the polishing wheel 12 may be the same as or opposite to that of the belt sleeve 8, but in the case of this embodiment, it is the opposite direction. The rotation speed of the polishing wheel 12 is 400 to 2,000 rpm.

A part of the polishing powder discharged from the polishing wheel 12 adheres to the belt sleeve 8, and the other powder is sucked from a duct (not shown) surrounding the polishing wheel 12 and used in the polishing machine. It is released to the outside. On the other hand, the polishing powder adhering to the belt sleeve 8 after polishing is removed by the rotating brush 15 and immediately discharged to the outside of the polishing machine by the operation of the vacuum device 16.

The rotating brush 15 is located on the drive roll 10 side and is installed on a support plate 19 connected to a cylinder 18. The rotating brush 15 is the transmission belt 2
It is connected to the drive motor 21 via 0 and rotates in the direction opposite to the running direction of the belt sleeve 8. When the cylinder 18 operates, the support plate 19 moves to bring the rotary brush 15 into contact with or away from the surface of the belt sleeve 8. The rotation speed of the rotating brush is 100
~ 800 rpm, and the pressure when the rotating brush 15 contacts the belt sleeve 8 is 2 to 6 kg / cm (linear pressure).
Is. The rotating brush 15 is always the belt sleeve 8
Since it is necessary to contact the surface of the plate with a constant pressure, it is moved during polishing.

The rotating brush 15 has a filament of synthetic fibers such as nylon and polyester, or a metal wire such as brass, which is implanted on the surface of the rotating shaft.

Further, the suction portion 17 of the vacuum device 16
Is a cover material 2 that partially surrounds the rotating brush 15.
The polishing powder removed from the rotary brush 15 is discharged to the outside by operating the suction device 24. A plurality of the suction units 17 may be installed. That is,
When the polishing powder attached to the surface of the belt sleeve 8 is removed by the rotating brush 15, the abrasive powder is sucked from the inside of the cover material 23 into the suction portion 17, and is discharged to the outside of the polishing machine through the pipe 25.

The polishing wheel 12 used here is not particularly limited, but for example, as shown in FIG. 3, a polishing portion 30 protruding at a constant pitch along the circumferential direction (indicated by the arrow in the drawing) is provided. Rib portions 31 and concave portions 3 which are alternately provided and whose polishing portions 30 have a triangular cross section at a constant pitch in the width direction and along the diagonal direction with respect to the rotation axis of the wheel 12.
2 and 2 alternately. The rib portion 31 and the concave portion 32
Particles 37 of 100 to 120 mesh made of diamond or the like are adhered to the surface of the front end surface 3 including the edge 34 of the rib portion 31 of the polishing portion 30 at the same time.
5, that is, the surface contacting the belt sleeve 8 is also attached.

The groove-shaped slit portion 36 provided between the polishing portions 30 serves as an area for temporarily releasing the stress applied to the surface to be polished of the belt sleeve 8 during processing and restoring the deformation. As a result, the surface to be polished is processed again by the polishing section 30 without leaving any distortion, which enables highly accurate polishing. For this reason, it is preferable that the number of slits 36 is large.

The belt sleeve 8 thus obtained
As shown in FIG. 4, a plurality of groove-shaped portions 9 are polished, and cut fibers are exposed from the surface in contact with the pulley.

The results of comparing the amount of abrasive powder adhered to the belt sleeve surface between the belt sleeve polishing method of the present invention and the conventional polishing method will be described below. First, as the belt sleeve 8 used in the polishing method of the present invention, the cover canvas 2 is a plain woven fabric in which both warp yarns and weft yarns are made of cotton yarn, and a stretchable woven fabric with rubber called a wide-angle canvas whose crossing angle is about 110 degrees. 1 ply is used, chloroprene rubber is used as cushion rubber 4, polyester fiber rope is used as core wire, chloroprene rubber is used as compressed rubber layer 6, and 8 vol% of nylon fiber 6 mm in length and length 3
3 mm by volume of aramid fiber cut yarns arranged in the width direction of the sleeve and mixed therein were used. The belt sleeve 8 is manufactured by reverse molding as shown in FIG.

As shown in FIG. 2, the belt sleeve 8 is hung on a driving roll 10 and a driven roll 11 and is run under a predetermined tension. , 800 rp
The belt sleeve 8 was rotated by m rotations and brought into contact with the belt sleeve 8. At the same time, the rotating brush 15 made of brass is rotated at 450 rpm in the direction opposite to the running direction of the belt sleeve 8, and
Belt sleeve 8 with rotating brush pressure of 2.0 kg / cm ^2.
Pressed against. Further, the vacuum device 16 is operated to set the vacuum amount to 25 m / sec. Adjusted to. As a result, 80 groove portions 9 were polished on the surface at once. The groove 9 had a depth of about 2 mm and the polishing time was 3.5 minutes.

The belt sleeve 8 after polishing was cut into a width of 25 ribs, the polishing powder adhering to the belt was cleaned with a brush, and the weight of the polishing powder removed was measured. As a result, the powder adhesion amount was 0.0087 g / 25 ribs. On the other hand, as a comparative example, when polishing was performed without mounting the rotating brush 15 and the vacuum device 16, the powder adhesion amount was 0.0962 g / 25 ribs.

[0020]

As described above, according to the method of polishing a belt sleeve of the present invention, the polishing powder adhering to the surface of the rib valley portion or the rib peak portion of the belt sleeve after polishing or the polishing meal left fixed on the sleeve surface is rotated. Brushed off,
In addition, since it is immediately discharged to the outside by suction, the remaining amount of the polishing powder adhering to the surface of the belt sleeve is greatly reduced, and the vacuum process, which is the final process of the operator, is eliminated and the production efficiency is greatly improved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a belt sleeve used in the present invention.

FIG. 2 is a front view showing a state in which a belt sleeve is being polished.

FIG. 3 is a partial perspective view of a polishing wheel used in the method of the present invention.

FIG. 4 is a partially enlarged view of a belt sleeve obtained by the method of the present invention.

[Explanation of symbols]

 8 Belt Sleeve 9 Groove 10 Drive Roll 11 Driven Roll 12 Polishing Wheel 15 Rotating Brush 16 Vacuum Device 17 Suction Part 23 Cover Material

Claims (2)

[Claims] 1. A cylindrical vulcanized belt sleeve in which a core wire is embedded in a rubber layer is hung on a driving roll and a driven roll to run under a predetermined tension, and further rotated on the running belt sleeve. In the method of polishing a belt sleeve in which the grooved portion is polished on the surface of the belt sleeve by bringing the polishing wheel into contact with the belt sleeve, the rotating brush is brought into contact with the belt sleeve and simultaneously rotated to adhere to the belt sleeve after polishing. A polishing method for a belt sleeve, characterized in that the polishing powder is removed and the polishing powder is discharged to the outside by suction. 2. The method for polishing a belt sleeve according to claim 1, wherein the rotating brush rotates in a direction opposite to that of the belt sleeve.