JP4398103B2 - Metal ring shape measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal ring shape measuring apparatus for measuring a curved shape of an endless belt-like metal ring.
[0002]
[Prior art]
For example, in a belt for power transmission employed in a continuously variable transmission, a laminated ring formed by laminating a plurality of endless band-shaped metal rings to bind together a plurality of elements arranged in a ring shape. Used. A metal ring constituting this kind of laminated ring is subjected to a rolling process for expanding the ring diameter so as to have a predetermined peripheral length and a peripheral length correction, and thereafter, a predetermined number of layers are laminated through aging / nitriding treatment. .
[0003]
However, when the rolling process is performed, the metal ring may be formed in a tapered shape due to a difference in peripheral length between the peripheral edge on one side and the peripheral edge on the other side. That is, in the rolling step, the diameter of the metal ring is expanded in a state where a certain tension is applied to the metal ring by extending the metal ring over a pair of rollers. At this time, for example, each roller is supported only on one end side of each shaft (so-called cantilever), so that each shaft receives the stress of the metal ring and the other end side of each shaft approaches each other. May tilt. And the metal ring supported by the roller whose axis | shaft inclined at the time of rolling will be formed in a taper shape as mentioned above.
[0004]
In this way, when forming the laminated ring, the tapered metal ring has a low laminating accuracy due to a gap or the like between each metal ring due to a difference in peripheral length or distortion of both side peripheries of each metal ring. When used in a machine belt, there is a disadvantage that the belt is shaken and reliable power transmission cannot be performed. Therefore, prior to assembling the continuously variable transmission belt, the shape of the metal ring is inspected to remove the defective metal ring.
[0005]
Conventionally, as an apparatus for inspecting the shape of a metal ring, the one shown in Japanese Patent Publication No. 5-50684 is known. This type of device includes a pair of rollers that span a metal ring and rotate by driving a motor, and a pair of displacement sensors that face each other in the width direction via the metal ring that is spanned between both rollers. ing. Then, the displacement of both ends of the metal ring when the metal ring is rotated by both rollers is detected by both displacement sensors, and the degree of distortion of the metal belt is measured based on the detected displacement amount.
[0006]
However, according to this type of device, vibration generated from the motor is transmitted to the rotating metal ring through the roller, and the rotation causes the metal ring to be displaced relative to the two rollers. There is an inconvenience that a measurement error occurs because the displacement sensor cannot detect the displacement of both end edges in a stable state. Furthermore, the detection of the displacement of both end edges by the both displacement sensors is performed while rotating the metal ring by rotating the roller, so that if a slip occurs between the metal ring and the roller, it is accurate. There is an inconvenience that cannot be measured.
[0007]
[Problems to be solved by the invention]
An object of the present invention is to provide a metal ring shape measuring apparatus capable of easily measuring the shape of the metal ring with high accuracy and with ease.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a metal ring shape measuring device for measuring the curved shape of an endless belt-like metal ring, and a pair of support rollers that span the metal ring and rotatably support the metal ring. And a ring fixing means that exposes one side edge of a part of the metal ring extending between the two support rollers, and clamps and fixes the metal ring linearly, and exposure of the metal ring clamped by the ring fixing means A detecting means provided with a contact slidably contacting one edge of the metal ring and movable along the extending direction of the metal ring, and outputting a detection signal based on a displacement amount of the contact; Moving means for moving the contact member along a predetermined measuring range, measuring means for measuring the shape of the metal ring based on the detection signal of the detecting means, and releasing the metal ring clamp by the ring fixing means When, characterized in that it comprises a ring rotating means by a predetermined distance rotated to clamp the metal ring.
[0009]
According to the present invention, first, a metal ring is stretched over each support roller. Next, a part of the metal ring extending between the two support rollers is clamped and fixed by the ring fixing means. At this time, the ring fixing means exposes one end of the metal ring and clamps it linearly. Thereby, for example, when there is a difference in circumferential length at both end edges of the metal ring and it is deformed in a taper shape in the width direction, the exposed metal ring clamped by the ring fixing means is curved. Fixed.
[0010]
Subsequently, by moving the detection means along the clamped metal ring by the moving means, the contact is slidably moved along one exposed end edge of the metal ring. Thereby, the detection means outputs the displacement of one side edge of the clamped portion of the metal ring. When the metal ring of the exposed portion that is clamped is curved, a displacement difference occurs in the contact, and based on the displacement difference output from the detection means, the measuring means moves the edge of one side of the metal ring. Measure the curved shape.
[0011]
Next, when the clamp by the ring fixing means is released, the ring rotating means clamps and rotates the metal ring. By providing the ring rotation means, it is possible to prevent inaccurate rotation due to slippage between the support roller and the metal ring as in the case where the metal ring is rotated by driving the conventional support roller. High-precision rotation can be performed over a distance. And by repeating the clamp by the ring fixing means and the displacement detection by the detecting means, the measuring means can accurately measure the curved shape of the entire circumference of the metal ring and eliminate the metal ring having a large curvature as a defective product. can do.
[0012]
Thus, according to the present invention, the detection means is moved with respect to the metal ring fixed by the ring fixing means, and the metal ring is accurately rotated by the ring rotation means. It is possible to easily measure the curved shape of the entire circumference of the ring.
[0013]
In the present invention, the support roller abuts against the edge of the metal ring opposite to the edge with which the contact is slidable, and has a hook-shaped contact portion that positions and supports the metal ring on the entire circumference. It is preferable to prepare for. As a result, when the metal ring is stretched over both the support rollers, the edge of the metal ring is positioned in contact with the contact portion, so that the clamping accuracy by the ring fixing means can be improved. When the metal ring is rotated by the ring rotating means, the metal ring can be prevented from being displaced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. 1 is an explanatory plan view of the measuring apparatus of the present embodiment, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 5 is an operation explanatory diagram of the ring fixing means, and FIG. 6 is an operation explanatory diagram of the displacement sensor.
[0015]
As shown in FIGS. 1 to 3, the measuring apparatus 1 according to the present embodiment includes a base 2, a pair of support rollers 3 and 4 that support the metal ring W and extends between the support rollers 3 and 4. And a ring fixing means 5 for clamping and fixing a part of the existing metal ring W. Further, a ring rotating means 6 for clamping and rotating the metal ring W supported by the both support rollers 3 and 4 is provided below the base 2. Further, a displacement sensor 7 (detection means) that is movable along the metal ring W fixed by the ring fixing means 5 is provided on the base 2 at a side position of the ring fixing means 5.
[0016]
The support rollers 3 and 4 are rotatably supported on the base 2 as shown in phantom lines in FIG. 3 and FIG. 4. Furthermore, the support rollers 3 and 4 are provided with a hook-like contact portion 8 that contacts the lower edge of the metal ring W when the metal ring W is supported over the entire circumference.
[0017]
As shown in FIG. 1, the ring fixing means 5 is positioned inside the metal ring W supported by the both support rollers 3 and 4 and can move forward and backward toward the inner peripheral surface of the metal ring W. A block 9 and a second gripping block 10 that is opposed to the first gripping block 9 and that can move forward and backward toward the outer peripheral surface of the metal ring W are provided. The first grip block 9 is slidably supported on a rail 11 extending on the base 2 along its advancing and retreating direction. Similarly, the second gripping block 10 is slidably supported on a rail 12 extending on the base 2 along the advance / retreat direction.
[0018]
Further, the rear end portion of the cylinder portion 14 of the drive cylinder 13 is connected to the first grip block 9. One end of a pair of drive rods 15 extending in parallel to the drive cylinder 13 is connected to the second gripping block 10, and the other end of both drive rods 15 is connected to a piston rod 17 of the drive cylinder 13 via a connecting member 16. It is connected to. The second grip block 10 is urged in the forward direction toward the metal ring W by a spring 18 connected to the base 2. In the base 2, a position (clamp position) where the first grip block 9 moves forward and contacts the outer peripheral surface of the metal ring W and a position where the first grip block 9 moves backward and separates from the outer peripheral surface of the metal ring W. A first stopper 19 for stopping the first gripping block 9 at the position (clamp release position) is provided. A second stopper 20 is provided to stop the second gripping block 10 at a position (clamp release position) where the second gripping block 10 moves backward and separates from the outer peripheral surface of the metal ring W. As will be described in detail later, when the piston rod 17 of the drive cylinder 13 is contracted, the metal ring W is clamped, and when the piston rod 17 of the drive cylinder 13 is extended, the metal ring W is clamped.
[0019]
Further, the first grip block 9 and the second grip block 10 have a length that is 3/1 or more of the entire circumference of the metal ring W along a part of the metal ring W extending between the support rollers 3 and 4. It is formed in the shape which has thickness. Furthermore, when the metal ring W is clamped, the first holding block 9 and the second holding block 10 are pressed against the substantially lower half of the metal ring W so that the substantially upper half of the metal ring W is exposed. It is provided as follows.
[0020]
As shown in FIGS. 2 and 3, the ring rotating means 6 includes a gripping means 22 having a pair of freely openable / closable claw members 21, a lift cylinder 23 that lifts and lowers the gripping means 22, and a lift cylinder 23. And a moving frame 24 that moves in the rotating direction of the metal ring W. As shown in FIG. 3, the moving frame 24 includes a sliding member 26 that can slide along the rail 25. The sliding member 26 is slid along the rail 25 by a cylinder (not shown).
[0021]
As shown in FIGS. 2, 3 and 6, the displacement sensor 7 is telescopically attached to the sensor body 27 and the sensor body 27 so as to be stretchable and biased in the extension direction by a spring or the like (not shown). The rod 28 and a contactor 29 connected to the tip of the telescopic rod 28 (lower end in the figure). Further, as shown in FIG. 6, the contact 29 includes a contact roller 30 that contacts the upper edge of the metal ring W and a roller holder 31 that rotatably supports the contact roller 30.
[0022]
The displacement sensor 7 is reciprocated along the metal ring W by the moving means 32 as shown in FIG. The moving means 32 includes a rail 33 extending along the moving direction of the displacement sensor 7, a support frame 34 slidable along the rail 33, and a rodless cylinder that drives the movement of the support frame 34. 35. Further, both ends of the rail 33 and the rodless cylinder 35 extend to the outside of the support rollers 3 and 4, and the support frame 34 is moved to the extended portion to move the rail 33 and the rodless cylinder 35 above the metal ring W. Thus, the displacement sensor 7 can be retracted. Further, the displacement sensor 7 includes a lifting cylinder (not shown). The lifting cylinder lowers the displacement sensor 7 at the measurement start position of the metal ring W and raises the displacement sensor 7 at the measurement end position.
[0023]
As shown in FIG. 1, a rotary encoder 38 is connected to the support frame 34 via a rack 36 and a pinion gear 37, thereby detecting the moving distance of the displacement sensor 7 via the support frame 34. Be able to. Further, a limit switch 39 for detecting that the support frame 34 is at the measurement end position is provided on the base 2 in order to synchronize the rise of the displacement sensor 7 when the support frame 34 passes the measurement end position. .
[0024]
Referring to FIG. 2, the displacement sensor 7 outputs a detection signal corresponding to the amount of displacement of the contact 29 via a lead wire (not shown). At this time, an output signal from the displacement sensor 7 is sent to a measuring means (not shown). In the measuring means, inspection data corresponding to the shape of the metal ring W is calculated based on a detection signal from the displacement sensor 7, and whether the metal ring W is good or bad can be determined based on the inspection data.
[0025]
Next, operation | movement of the measuring apparatus 1 of this embodiment by the above structure is demonstrated. Referring to FIG. 1, first, the displacement sensor 7 is retracted, and both the holding blocks 9 and 10 of the ring fixing means 5 are separated. Both grip blocks 9 and 10 are separated by contracting the piston rod 17 of the drive cylinder 13. That is, when the piston rod 17 of the drive cylinder 13 contracts, first, the cylinder portion 14 of the drive cylinder 13 is moved relative to the piston rod 17, and the first grip block 9 is retracted and stopped by the first stopper 19. . Subsequently, when the piston rod 17 of the drive cylinder 13 is further contracted, the second gripping block 10 is brought into contact with the second stopper 20 in the retracted position against the bias of the spring 18 via the drive rod 15. The grip blocks 9 and 10 are separated.
[0026]
In this state, the metal ring W is stretched over the support rollers 3 and 4. At this time, as shown in FIG. 4, the metal ring W is reliably supported because the lower edge abuts against the abutting portions 8 provided on the both supporting rollers 3 and 4.
[0027]
Subsequently, as shown in FIG. 5, when the piston rod 17 of the drive cylinder 13 is extended, first, the second grip block 10 is advanced by the bias of the spring 18. Next, the cylinder portion 14 moves relatively along the piston rod 17 to advance the first grip block 9, and is stopped by the first stopper 19. Thereby, the metal ring W is clamped linearly by the first grip block 9 and the second grip block 10.
[0028]
Next, the displacement sensor 7 is moved above the metal ring W by the moving means 32, and the contact roller 30 constituting the contact 29 of the displacement sensor 7 is provided in the displacement sensor 7 as shown in FIG. The metal ring W is brought into contact with the upper edge of the metal ring W by being lowered by the lifting cylinder. Further, the displacement sensor 7 is moved by the moving means 32 (see FIG. 1), thereby moving along the measurement range of the upper edge of the clamped metal ring W. When the displacement sensor 7 moves along the upper end of the metal ring W, the contact 29 is displaced along the curved shape of the metal ring W as indicated by the phantom line in the drawing according to the movement (in FIG. The curved shape of the ring W is exaggerated). The displacement of the contact 29 at that time is output and sent to the measuring means.
[0029]
Subsequently, as shown in FIG. 1, when the displacement sensor 7 is moved to the measurement end position, the limit switch 39 is operated, and the contact roller 30 is raised to a position where it does not interfere with the metal ring W by the elevating cylinder. The Next, the displacement sensor 7 is moved back by the moving means 32 while the contact roller 30 is maintained at the raised position by the elevating cylinder, and returns to the original position (left side in FIG. 1). At this time, the ring rotating means 6 starts to operate, and both the holding blocks 9 and 10 of the ring fixing means 5 are separated in synchronism with the operation. Then, the ring rotating means 6 rotates the metal ring W by a predetermined distance. As shown in FIG. 3, the ring rotating means 6 is first lifted by the gripping blocks 9 and 10 toward the clamped metal ring W. When the gripping means 22 grips the metal ring W, the clamps by the gripping blocks 9 and 10 are released and moved by the moving frame 24. As a result, the metal ring W is rotated around both the support rollers 3 and 4.
[0030]
Then, as described above, the clamping by both gripping blocks 9 and 10 and the measurement by the displacement sensor 7 are repeated, and the curvature over the entire circumference of the metal ring W is measured. Thereby, a defect can be easily confirmed from the curved state of the entire circumference of the metal ring W.
[0031]
In the present embodiment, the turning distance of the metal ring W by the ring turning means 6 is set so as to correspond to about 1/3 of the circumference of the metal ring W. In the measuring means, the curvature of the entire circumference of the metal ring W is calculated by combining the detection results of the displacement sensors 7 each time. As a result, the degree of curvature of the metal ring W can be measured accurately and quickly.
[Brief description of the drawings]
FIG. 1 is an explanatory plan view of a measuring apparatus according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line II-II in FIG.
FIG. 3 is a sectional view taken along line III-III in FIG.
FIG. 4 is an explanatory view showing the shape of a support roller.
FIG. 5 is an operation explanatory view of the ring fixing means.
FIG. 6 is an operation explanatory diagram of a displacement sensor.
[Explanation of symbols]
W ... Metal ring, 1 ... Measuring device, 3, 4 ... Support roller, 5 ... Ring fixing means, 6 ... Ring rotating means, 7 ... Displacement sensor (detection means), 8 ... Contact part, 29 ... Contact, 32 ... Moving means.

Claims (2)

A metal ring shape measuring device for measuring the curved shape of an endless belt-shaped metal ring,
A pair of support rollers that span the metal ring and rotatably support the metal ring;
A ring fixing means for exposing and fixing one side edge of a part of the metal ring extending between the two supporting rollers and linearly clamping and fixing;
A contact that is slidably in contact with the exposed one side edge of the metal ring clamped by the ring fixing means is provided movably along the extending direction of the metal ring, and is based on the amount of displacement of the contact Detection means for outputting a detection signal;
Moving means for moving the contact of the detecting means along a predetermined measurement range;
Measuring means for measuring the shape of the metal ring based on the detection signal of the detecting means;
An apparatus for measuring a shape of a metal ring, comprising: a ring rotation means for clamping the metal ring and rotating the metal ring by a predetermined distance when the metal ring clamp by the ring fixing means is released. The support roller is provided with a hook-shaped contact portion that positions and supports the metal ring on an entire circumference thereof in contact with an end edge of the metal ring opposite to an end edge with which the contact is slidably contacted. The metal ring shape measuring device according to claim 1.

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