JP4398160B2 - Method and apparatus for processing metal ring for endless metal belt - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a method and apparatus for processing a thin metal ring used for an endless metal belt.
[0002]
[Prior art]
For example, 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 predetermined width with a thin disc-shaped grindstone. Moreover, since the metal ring cut | disconnected from the cylindrical drum has the burr | flash in the side edge, it is necessary to grind | polish the burr | flash.
[0003]
As a conventional method for polishing the side edge of a metal ring, a method disclosed in Patent Document 1 below is known. The metal ring processing method disclosed in Patent Document 1 is a method called barrel polishing. A metal ring as a workpiece is mixed in a barrel filled with a grindstone called a medium, and the metal ring is combined with the medium. Rotate 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.
[0004]
However, when barrel polishing is performed, there is a case where a part of the grindstone is dropped from the medium due to the collision between the medium and the metal ring, and the dropped grindstone is attached to the surface of the metal ring. Further, some grindstones adhering to the surface of the metal ring cannot be removed even by cleaning. As described above, the metal ring having the grindstone attached to the surface has a disadvantage that the grindstone is driven into the metal ring when rolled in a subsequent process and cannot be used. In addition, when the metal ring is put into the barrel and when the barrel is polished, the metal rings may collide with each other to cause scratches. Although such a metal ring is removed by inspection, it has been a cause of worsening the yield.
[0005]
On the other hand, in the following Patent Document 2, a method of polishing a side edge of a metal ring with a grindstone is disclosed. However, in grinding with a grindstone, the shape of the side edge of the metal ring depends on the shape of the grindstone. Therefore, it is necessary to frequently perform maintenance such as dressing and replacement of the grindstone in order to maintain a predetermined dimension after grinding. is there.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-241512 (page 3, FIG. 4)
[0007]
[Patent Document 2]
Japanese Patent Laid-Open No. 2002-248522 (second page, FIG. 3)
[0008]
[Problems to be solved by the invention]
The present invention aims to improve a processing method and apparatus for a metal ring, and more specifically, in order to eliminate the inconvenience, the side edge of the metal ring can be polished without performing barrel polishing or polishing with a grindstone. It aims at providing the processing method and apparatus of a metal ring.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the metal ring processing method of the present invention is a method of processing a thin plate-shaped metal ring used for an endless metal belt, the step of cutting the metal ring from a thin plate-shaped metal drum, the cut metal ring, is rotated in the circumferential direction and held in a substantially circular shape, the rotation trajectory of the metal rings so as to cross at a predetermined angle, the abrasive brush to one side edge of the metal ring those by contact and a step of polishing the side edge, in the step of polishing the metal ring, the trajectory of the polishing brush, a center of at least the polishing brush with respect to the rotation trajectory of the metal ring 20 ° to 45 ° angle of incidence enters the inside of the metal ring, between the center of rotation of the metal ring and the inner peripheral surface of the metal ring, as the whole of the polishing brush, the gold At least the center of the polishing brush with respect to the rotation trajectory of the ring is equal to or away from the metal ring 20 ° to 45 ° exit angle.
[0010]
According to the metal ring processing method of the present invention, since the side edge of the metal ring is polished by the polishing brush, there is no possibility that the grindstone adheres to the ring surface unlike conventional barrel polishing. Moreover, it is not necessary to perform dressing of the grindstone or the like unlike the conventional grindstone polishing.
[0011]
In the processing method of the metal ring of the present invention, and the incident angle and the exit angle was 20 ° to 45 °. By making the incident angle and the retraction angle of the polishing brush with respect to the metal ring 20 ° to 45 °, good chamfering of the side edge of the metal ring can be performed. When the incident angle and the withdrawal angle are less than 20 °, the polishing amount of the side edge of the metal ring is reduced, so that the polishing brush speed must be increased or the polishing time must be increased. If the incident angle is less than 20 °, the polishing brush contacts the inner peripheral surface of the metal ring and is polished to the inner peripheral surface. On the other hand, when the incident angle and the withdrawal angle exceed 45 °, only the top of the side edge of the metal ring is polished, and good chamfering cannot be performed.
[0012]
In the metal ring processing method of the present invention, in the step of polishing the metal ring , the polishing brush is moved in the forward direction to prevent the polishing brush from being damaged , and the metal ring is moved for a predetermined time. After polishing the ring, the metal ring is preferably polished for a predetermined time by moving the polishing brush in the reverse direction. As a result, the metal ring can be polished uniformly, and the polishing brush can be prevented from becoming hazy.
[0013]
Moreover, in the processing method of the metal ring of this invention, it is preferable to arrange | position the said polishing brush on the circumference larger diameter than the outer periphery of the said metal ring. Thus, since the metal ring can be polished by rotating the polishing brush by arranging the polishing brush on the circumference, the polishing apparatus including the polishing brush has a simple configuration. be able to.
[0014]
In the metal ring processing method of the present invention, it is preferable that in the step of cutting out the metal ring from the metal drum, the metal drum is pushed out with a cutter having a chevron. When the metal drum is cut by cutting the metal drum with a thin disc-shaped grindstone as in the past, the side edge of the metal ring becomes quadrangular in a cross-sectional view, so the side edge of the metal ring is chamfered from this state. In order to do this, the machining allowance must be increased. In the present invention, since the metal ring is cut by a cutter having a chevron, the side edge of the metal ring is chamfered by transferring the shape of the cutter. Therefore, the cutting allowance can be reduced as compared with the conventional case of cutting with a grindstone.
[0015]
The metal ring processing apparatus of the present invention is a device for processing a thin metal ring used for an endless metal belt, and holds a metal ring cut out from a thin cylindrical metal drum in a substantially circular shape. When polishing one side edge of the conveyance table and the metal ring rotated in the circumferential direction, the side edge is set so that the incident angle and the withdrawal angle are 20 ° to 45 ° and cross the rotation track of the metal ring. Brush moving means for bringing an abrasive brush into contact with an edge, and the brush moving means is disposed between an inner peripheral surface of the metal ring and a rotation center of the metal ring when traversing a rotation orbit of the metal ring. All of the polishing brush is allowed to pass.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, an example of an embodiment of a method and apparatus for polishing a side edge of a metal ring according to the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view showing a metal ring processed by the processing method of the present embodiment, FIG. 2 is an explanatory view showing a process of cutting out the metal ring from the metal drum, and FIG. 3 is a cut surface in a state where the metal ring is cut out. FIGS. 4 and 5 are explanatory views showing a metal ring polishing apparatus, and FIGS. 6 and 7 are explanatory views showing the relationship between the metal ring and the path of the polishing brush.
[0017]
First, as shown in FIG. 1, the metal ring 1 is formed in a thin plate-like endless belt shape, and is used for an endless metal belt in a belt-type continuously variable transmission. As shown in the enlarged view of FIG. 1, the cross-sectional shape of the side edge is chamfered in a substantially arc shape.
[0018]
Next, with reference to FIG.2 and FIG.3, the cutting device 2 of the metal ring 1 is demonstrated. As shown in FIG. 2, the cutting device 2 includes a holding member 4 that holds the metal drum 3 in a cylindrical shape, a disk-shaped cutter 5 having a chevron surface, and a cutter that rotatably holds the cutter 5. A holding unit 6 and a receiving roller 7 that contacts the outer peripheral surface of the metal drum 3 and rotates as the metal drum 3 rotates are provided. The receiving roller 7 is made of a synthetic resin having elasticity, and presses the metal drum 3 from the outer peripheral side when the cutter 5 pushes the metal drum 3 from the inner peripheral side.
[0019]
Next, the polishing apparatus 8 for the metal ring 1 will be described with reference to FIGS. As shown in FIG. 4, the polishing apparatus 8 in the present embodiment includes a columnar brush head 10 in which a polishing brush 9 is provided on the circumference, and a transport table 11 that holds four metal rings 1. ing. The polishing brush 9 is a bundle of nylon wires containing an abrasive and can be processed from roughing to finishing by selecting abrasives having different roughness. The brush head 10 is controlled so as to alternately repeat forward rotation and reverse rotation by a motor (not shown).
[0020]
The transfer table 11 is provided with a clamp 12 that holds the metal ring 1 from the inside. The clamp 12 is formed by two members as shown in FIG. 6, and the metal ring 1 is placed around the two members in a state in which the two members are close to each other, and the two members are separated from each other. The metal ring 1 is held from the peripheral surface. The clamp 12 is rotatable in one direction by a motor (not shown).
[0021]
Further, in the present embodiment, as shown in FIG. 5, the transfer table 11 is mounted on the turntable 13 that rotates clockwise, and the side edge of the metal ring 1 is continuously polished in five areas. Do it. First, the carrying table 11 is mounted on the turntable 13, the carry-in area A, the coarse processing area B that is polished by the smaller (coarse) polishing brush 9a, and the count that is used in the coarse processing area B. Intermediate processing area C where polishing is performed with a large (fine) polishing brush 9b, then finishing area D where final polishing is performed with the largest (fine) polishing brush 9c, and finally the transfer table 11 is carried out of the turntable 13. It is a carry-out area E to be performed. In this embodiment, the count of the polishing brush 9a is # 46, the count of the polishing brush 9b is # 120, and the count of the polishing brush 9c is # 320.
[0022]
Next, the processing method of the metal ring 1 of this embodiment is demonstrated with reference to FIG. 2 thru | or FIG. First, as shown in FIGS. 2 and 3, the metal ring 1 is cut out from the metal drum 3. Specifically, as shown in FIG. 2, the cutter 5 is pressed against the inner peripheral surface of the metal drum 3 by the cutter holder 6 while rotating the metal drum 3 mounted on the holding member 4. At this time, the outer peripheral surface of the metal drum 3 against which the cutter 5 is pressed is held by the receiving roller 7. Since the receiving roller 7 is made of a synthetic resin having elasticity, the metal drum 3 pushed up by the cutter 5 is pushed by the cutter 5 while being bent toward the receiving roller 7 side. When the cutter 5 is separated from the metal drum 3, the cut surface (side edge) of the metal ring 1 is chamfered by the cutter 5 as shown in FIG. 3.
[0023]
Next, the side edge of the metal ring 1 is polished by the polishing apparatus 8. First, in the carry-in area A in FIG. 5, the transfer table 11 in which the four metal rings 1 are held by the clamps 12 is mounted on the turntable 13. Thereafter, the turntable 13 is rotated clockwise in FIG. During the movement by the turntable 13, the side edge of the metal ring 1 and the polishing brush 9a provided in the roughing area B are not in contact with each other because there is a predetermined interval.
[0024]
In the rough machining area B, the metal ring 1 is rotated clockwise by the clamp 12. Further, the brush head 10 is rotated clockwise, the polishing brush 9a is brought close to the metal ring 1 so as to abut the side edge of the metal ring 1, and the side edge of the metal ring 1 is polished by the polishing brush 9a. At this time, the trajectory of the polishing brush 9a and the trajectory of the metal ring 1 are such that both the incident angle and the exit angle are θ as shown in FIG. In the present embodiment, this θ is set to about 35 °.
[0025]
Then, the polishing brush 9a is rotated clockwise to polish the metal ring 1 for a predetermined time, and then the polishing brush 9a is rotated counterclockwise to perform polishing for a predetermined time. In this embodiment, since the polishing brush 9a is rotated clockwise and counterclockwise in this manner, the metal ring 1 can be polished uniformly, and the polishing brush 9a can be prevented from being wrinkled. ing.
[0026]
Next, also in the intermediate processing area C, as in the rough processing area B, the polishing brush 9 b is rotated clockwise and counterclockwise to polish the side edge of the metal ring 1. Also in the finishing area D, the polishing brush 9c is rotated clockwise and counterclockwise to polish the side edge of the metal ring 1. Thus, in the present embodiment, the polishing of the side edge of the metal ring 1 is performed by the polishing brushes 9a to 9c having different counts. Then, in the carry-out area E, the transfer table 11 is paid out from the turntable 13.
[0027]
Through the above steps, the polishing of one side of the side edges of the metal ring 1 is completed. The metal ring 1 paid out from the carry-out area E is once removed from the clamp 12 of the transfer table 11, and then held by the clamp 12 so that the other side edge that has not been processed faces upward. The other side edge is polished by the same process as the polishing process. When both side edges are polished as described above, the metal ring 1 shown in FIG. 1 is formed.
[0028]
Here, with reference to FIG. 7, the relationship between the metal ring 1 and the polishing brush 9 when the track of the metal ring 1 and the polishing brush 9 are 20 ° and 45 ° will be described. As shown in FIG. 7 a, when the angle between the track of the metal ring 1 and the track of the polishing brush 9 is less than 20 °, the outer portion of the polishing brush 9 passes without contacting the metal ring 1. Further, the polishing brush 9 comes into contact with the inner peripheral surface of the metal ring 1 and the inner peripheral surface of the metal ring 1 is polished. In order to avoid such a situation, the outer diameter of the polishing brush 9 must be made small as shown by 9s in FIG. 7a. However, when the diameter of the brush 9 is reduced in this way, the waist of the brush becomes weak and sufficient polishing cannot be performed.
[0029]
On the other hand, when the angle between the track of the metal ring 1 and the track of the polishing brush 9 exceeds 45 ° as shown in FIG. 7b, when the polishing brush 9 comes into contact with the metal ring 1, the metal ring as shown in FIG. Only the top of the side edge of 1 is polished, and the polishing amount w in the width direction of the metal ring 1 is insufficient. For the above reason, in this embodiment, the angle between the track of the metal ring 1 and the track of the polishing brush 9 is set to 20 ° to 45 °.
[0030]
In the above embodiment, the polishing brush 9 is disposed on the brush head 10 in the circumferential direction, and the brush head 10 is rotated to perform polishing. As long as the incident angle and the exit angle are maintained at a predetermined angle, polishing may be performed with another track. For example, you may grind | polish by making the grinding | polishing brush 9 contact | abut to the side edge of the metal ring 1 which rotates while moving with a linear rail. Further, the trajectory of the polishing brush 9 may have an incident angle and a withdrawal angle different from each other.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a metal ring processed by the processing method of the embodiment.
FIG. 2 is an explanatory view showing a step of cutting a metal ring from a metal drum.
FIG. 3 is an explanatory view showing a cut surface in a state where a metal ring is cut out.
FIG. 4 is an explanatory view showing a polishing apparatus for a metal ring.
FIG. 5 is an explanatory view showing a polishing apparatus for a metal ring.
FIG. 6 is an explanatory view showing the relationship between the metal ring and the path of the polishing brush.
FIG. 7 is an explanatory diagram showing the relationship between the raceway of the metal ring and the polishing brush.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Metal ring, 2 ... Cutting device, 3 ... Metal drum, 8 ... Polishing device, 9 ... Polishing brush.

Claims (5)

In a method of processing a thin metal ring used for an endless metal belt ,
Cutting a metal ring from a thin cylindrical metal drum;
The cut metal ring, is rotated in the circumferential direction and held in a substantially circular shape, the rotation trajectory of the metal rings so as to cross at a predetermined angle, the abrasive brush to one side edge of the metal ring those by contact and a step of polishing the side edge,
In the step of polishing the metal ring, the orbit of the polishing brush enters the inside of the metal ring at an incident angle of 20 ° to 45 ° at least with respect to the rotation orbit of the metal ring. ,
Between the inner peripheral surface of the metal ring and the rotation center of the metal ring, the entire polishing brush passes,
A method of processing a metal ring, characterized in that at least the center of the polishing brush is separated from the metal ring with a retraction angle of 20 ° to 45 ° with respect to the rotation track of the metal ring. In the step of polishing the metal ring, the polishing brush is moved in the forward direction and the metal ring is polished for a predetermined time in order to prevent the polishing brush from being damaged, and then the polishing brush is moved in the reverse direction. The metal ring processing method according to claim 1 , wherein the metal ring is polished for a predetermined time after being moved.   The metal ring processing method according to claim 1, wherein the polishing brush is disposed on a circumference larger in diameter than the outer circumference of the metal ring. In the step of cutting the metal ring from the metal drum, working method of the metal ring according to any one of claims 1 to 3, characterized in that Oshikiru the metal drum blade face is at chevron cutter. In an apparatus for processing a thin metal ring used for an endless metal belt,
A transport table that holds a metal ring cut out from a thin cylindrical metal drum in a substantially circular shape and rotates it in a circumferential direction;
When polishing one side edge of the metal ring, a brush movement is made so that a polishing brush abuts on the side edge so that an incident angle and a withdrawal angle are 20 ° to 45 ° and traverse the rotation track of the metal ring. Means, and
The brush moving means allows the entire polishing brush to pass between an inner peripheral surface of the metal ring and a rotation center of the metal ring when traversing a rotation orbit of the metal ring. Processing equipment.

Images