JP2005254339A - Brush polishing device of metal ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brush polishing device of a metal ring, restraining abrasion and reforming of a polishing brush to reduce maintenance work, and polishing the metal ring with high accuracy over a long period of time with a brush. <P>SOLUTION: This brush polishing device 1 includes: a ring holding means for cylindrically holding the metal ring W; and a ring rotating means for rotating the metal ring in its peripheral direction through the ring holding means. Further, the brush polishing device 1 includes: a brush holding means 7 for holding a polishing brush 2 formed by bundling a plurality of linear materials in a cylindrical shape to freely rotate taking the longitudinal direction of bristles of the polishing brush 2 as an axis; and a brush moving means for moving the polishing brush 2 to cross a rotary track of the metal ring W held in the ring holding means 6 through the brush holding means 7 and abutting the polishing brush on one edge of the metal ring W to polish the metal ring W. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a metal ring brush polishing apparatus for polishing an edge of a thin cylindrical metal ring with a polishing brush.

  2. Description of the Related Art In a power transmission belt employed in a continuously variable transmission, a belt in which a plurality of elements arranged in a ring shape are bundled by a laminated ring formed by laminating a plurality of metal rings is used. A metal ring constituting this type of laminated ring is formed in an endless belt shape by cutting a cylindrical metal drum into a ring for each predetermined width. And since the metal ring cut from the cylindrical drum has a very sharp side edge, it is necessary to polish the side edge of the metal ring and finish the side edge into a highly accurate curved shape. Become.

  Conventionally, barrel polishing is used as a method for polishing the side edge of a metal ring (see Patent Document 1). In this type of barrel polishing, a metal ring is mixed in a barrel filled with a grindstone called a medium, and the metal ring is rotated together with the medium in the barrel. As described above, the metal ring is agitated in the barrel together with the medium so that the medium comes into contact with the side edge of the metal ring and the side edge of the metal ring is polished.

  However, in barrel polishing, the metal ring is agitated in the barrel together with the media to bring the media into contact with the side edges of the metal ring, so the degree of polishing tends to be uneven and the processing of the side edges of the metal ring is difficult. There is a disadvantage that the shape cannot be accurately controlled so as to be a desired shape.

  Further, in order to eliminate the disadvantages of barrel polishing, the polishing brush is brought into contact with one side edge of the metal ring while rotating the metal ring in the circumferential direction so that the polishing brush crosses the rotation track of the metal ring. It is conceivable that the side edge of the metal ring is polished by moving the metal ring. In this case, after polishing one side edge of the metal ring, the other side edge of the metal ring may be similarly polished. By doing so, the shape of the side edge of the metal ring can be polished to a desired shape only by adjusting the amount of contact of the polishing brush with the metal ring.

However, this type of polishing brush is generally formed by bundling nylon wire with abrasive material, and the polishing brush always abuts the metal ring from the same direction when crossing the rotating track of the metal ring. When used for polishing a metal ring for a long period of time, the wear of the polishing brush is biased, or the polishing brush is wrinkled in a bent state along the contact direction with the metal ring. When a polishing brush with wear or wrinkles is used, the contact of the polishing brush with the metal ring becomes insufficient, and the side edge of the metal ring is not polished into a desired shape. For this reason, in order to maintain high polishing accuracy, it is not only necessary to perform dressing of the polishing brush frequently, but the polishing brush is worn out in a short time due to frequent dressing, and new polishing is performed. There is an inconvenience that the brush must be replaced frequently.
JP 2001-241512 A (page 4 0032)

  The present invention eliminates such inconveniences, and the present invention can suppress the wear and wrinkles of the polishing brush to reduce the dressing work extremely, and reduce the frequency of replacing the polishing brush to reduce the trouble of maintenance work and replacement work. An object of the present invention is to provide a metal ring brush polishing apparatus that can drastically reduce the life of the metal ring and that can perform high-precision brush polishing on the metal ring over a long period of time by extending the life of the polishing brush. .

  In order to achieve such an object, a brush polishing apparatus for a metal ring according to the present invention comprises a ring holding means for holding a thin cylindrical metal ring in a circular shape with one end thereof exposed, and a ring holding means. A ring rotating means for rotating the metal ring in its circumferential direction, and a polishing brush formed by bundling a plurality of wire rods in a columnar shape so as to be rotatable about the longitudinal direction of the bristles of the polishing brush. A brush holding means, and the polishing brush is moved across the rotation orbit of the metal ring held by the ring holding means via the brush holding means and brought into contact with one edge of the metal ring And a brush moving means for polishing the metal ring.

  According to the present invention, the metal ring is rotated in the circumferential direction by the ring rotating means while being held in a circular shape by the ring holding means. On the other hand, the polishing brush is moved by the brush moving means so as to cross the rotation trajectory of the metal ring held by the ring holding means while being held by the brush holding means. Then, when the polishing brush crosses the rotating track of the metal ring, the edge of the metal ring is polished by the contact of the polishing brush with the edge of the metal ring. At this time, since the polishing brush is held by the brush holding means so as to be rotatable about the longitudinal direction of the bristles, the polishing brush rotates by receiving the rotation of the metal ring when contacting the metal ring. By such rotation of the polishing brush, the portion of the polishing brush that comes into contact with the metal ring is always different, so that the bias of wear is reduced and the wrinkle can be suppressed. This prevents abrasion of the polishing brush without frequent dressing of the polishing brush, thus extending the life of the polishing brush and enabling accurate polishing over a long period of time without replacing the polishing brush. The number of times can be drastically reduced to achieve higher efficiency.

  In the present invention, it is preferable that the brush moving unit alternately repeats the movement of the polishing brush in the forward direction and the movement in the reverse direction every predetermined time. As a result, the metal ring W can be polished evenly, and the wrinkle of the polishing brush can be more reliably suppressed.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a metal ring whose both edges are polished in this embodiment, FIG. 2 is an explanatory perspective view schematically showing a brush polishing apparatus of this embodiment, and FIG. 3 is a ring holding means and a polishing brush. 4 is an explanatory sectional view schematically showing the configuration of the brush head, FIG. 5 is an explanatory view schematically showing the operation of the polishing brush, and FIG. 6 is a polishing state of the metal ring by the polishing brush. It is explanatory drawing which shows.

  As shown in FIG. 1, the metal ring W is formed in a thin plate-like endless belt shape, and is used for an endless belt of a continuously variable transmission. Although not shown, the metal ring W is formed in an endless belt shape by cutting a cylindrical metal drum into a ring for each predetermined width. The metal ring W immediately after being cut from the cylindrical drum has a very sharp side edge. In the present embodiment, by polishing the side edge of the metal ring W, both edges are processed into a predetermined curved shape as shown in a cross section in the enlarged view of FIG.

  As schematically shown in FIG. 2, the brush polishing apparatus 1 that is an apparatus of this embodiment includes a cylindrical brush head 3 in which a plurality of polishing brushes 2 are provided on the circumference, and six metal rings W. And a holding table 4.

  The table 4 is provided with ring holding means 5 for holding the metal ring W from the inside. The ring holding means 5 is formed by six abutting members 6 as shown in FIG. 3, with the six abutting members 6 being brought close to each other, a metal ring W is placed around the six abutting members 6 By separating the abutting member 6 from the inner peripheral surface, the abutting member 6 is abutted against the metal ring W and held in a circular shape. The ring holding means 5 is driven to rotate by a motor (not shown) which is a ring rotating means. Thereby, each metal ring W is rotated in the circumferential direction.

  As shown in FIG. 4, the brush head 3 includes a disc-shaped brush holding plate 7 serving as a brush holding means, and a rotating shaft 8 connected to the axis of the brush holding plate 7. The rotating shaft 8 is connected to a motor (not shown) which is a brush moving means. When the brush holding plate 7 is rotated by the motor, each polishing brush 2 is moved along a circumferential track. Further, the brush holding plate 7 is provided with a rotating member 10 incorporating a bearing 9 at a holding position of each polishing brush 2.

  Each polishing brush 2 is formed by bundling a plurality of nylon wires containing an abrasive in a cylindrical shape, and the binding state is firmly maintained by the binding member 11 at the base end portion. Each polishing brush 2 is detachably connected to the rotating member 10 of the brush holding plate 7 via a binding member 11 by a set screw 12. As a result, each polishing brush 2 is rotatable about the longitudinal direction of the bristles.

  Further, the brush head 3 includes a support plate 13 that supports the tip of each polishing brush 2 in a penetrating state. The support plate 13 regulates unnecessary spreading of each polishing brush 2 by a through hole 14 that opens to a size that does not prevent the rotation of each polishing brush 2. Further, the support plate 13 is provided so as to be movable up and down by a plurality of support rods 15 that are adjustable to extend and contract. The polishing brush 2 that protrudes downward from the support plate 13 has a predetermined protruding amount and is suitable for the polishing brush 2. With high rigidity and processing power.

  Then, when the brush head 3 is rotated, as shown in FIG. 5, each polishing brush 2 moves across each rotating metal ring W, and the polishing brush is applied to one side edge of the metal ring W. Polishing is performed over the entire periphery of one side edge of the metal ring W by contacting the two. That is, as shown in FIG. 6, the polishing brush 2 gets over one side end edge of the metal ring W, and one side end edge of the metal ring W is polished into a predetermined curved shape. Further, at this time, as shown in FIG. 3, when the polishing brush 2 comes into contact with the metal ring W, the polishing brush 2 rotates as the metal ring W rotates. Thereby, since the contact part with the metal ring W in the polishing brush 2 is always different, not only the wear unevenness of the polishing brush 2 is reduced, but also the wrinkle can be suppressed.

  The brush head 3 may be rotationally driven by the motor so as to alternately repeat forward rotation and reverse rotation. Specifically, the polishing brush 2 is rotated clockwise to polish the metal ring W for a predetermined time, and then the polishing brush 2 is rotated counterclockwise to perform polishing for a predetermined time. Thus, by rotating the polishing brush 2 clockwise and counterclockwise, the metal ring W can be uniformly polished, and the polishing brush 2 can be further prevented from being wrinkled.

Explanatory drawing which shows the metal ring by which the both-ends edge was grind | polished in this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS Explanatory perspective view which shows the brush grinding | polishing apparatus of this embodiment typically. Explanatory drawing which shows typically an action | operation of a ring holding means and an abrasive brush. Explanatory sectional drawing which shows the structure of a brush head. Explanatory drawing which shows the action | operation of an abrasive brush typically. Explanatory drawing which shows the grinding | polishing state of the metal ring with a grinding | polishing brush.

Explanation of symbols

  W ... metal ring, 1 ... brush polishing device, 2 ... polishing brush, 5 ... ring holding means, 7 ... brush holding plate (brush holding means).

Claims (2)

A ring holding means for holding a thin cylindrical metal ring in a circular shape with one edge thereof exposed;
Ring rotating means for rotating the metal ring in its circumferential direction via ring holding means;
A brush holding means for holding a polishing brush formed by bundling a plurality of wire rods in a cylindrical shape so as to be rotatable about the longitudinal direction of the bristles of the polishing brush;
The polishing brush is moved across the rotating track of the metal ring held by the ring holding means via the brush holding means and is brought into contact with one end edge of the metal ring to polish the metal ring. A brush polishing apparatus for a metal ring, comprising: a brush moving means.   2. The brush polishing apparatus for a metal ring according to claim 1, wherein the brush moving means alternately repeats the movement of the polishing brush in the forward direction and the movement in the reverse direction at predetermined time intervals.

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