JP2010227952A - Metal ring charging/discharging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal ring charging/discharging device capable of properly charging/discharging a metal ring without performing a tooling change even when the circumferential length of a ring material that is rolled and corrected on its circumferential length varies. <P>SOLUTION: The metal ring charging/discharging device is provided with a clamping means having claw members for holding only the out sides of a metal ring. The clamping means holds the metal ring in the radial direction with the claw members so that the metal ring is deformed into a nearly elliptical shape consisting of a pair of circular arc parts, which are curved larger than the diameters of tension rollers and a pair of bowstring parts, which are opposed in parallel with each other with the circular arc parts interposed. Then, the metal ring is transferred to an area including both tension rollers. When the curve diameters of both circular arc parts of the metal ring are reduced with separation of both tension rollers in such a manner that the curve diameters of both circular arc parts approximate the diameters of the tension rollers, holding of the metal ring is released to deliver the metal ring to both tension rollers, so that charging of the metal ring is executed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a metal ring loading / unloading device for loading and unloading a metal ring in an endless metal belt used in a continuously variable transmission (CVT) or the like into a rolling mill.

  A continuously variable transmission used as a transmission for an automobile or the like includes an endless belt-like metal belt that is wound around a pair of pulleys. This endless belt-like metal belt uses a pair of laminated metal rings obtained by laminating a plurality of endless belt-like metal rings having different circumferential lengths in the thickness direction, and by engaging these pair of laminated metal rings from the width direction, This is a configuration in which a large number of plate-like elements are arranged in an annular shape in the thickness direction.

  Said metal ring is manufactured as follows. First, both ends of a thin plate of a steel material such as maraging steel or stainless steel are welded so as to be cylindrical. At this time, since a part of the steel material is hardened by the heat of welding, the cylindrical steel material is solutionized and homogenized. Next, this solution-formed cylindrical steel material is cut into a predetermined width to form an endless belt-like ring, and then rolled to a predetermined thickness. Since the metal structure is deformed by the rolling, the rolled ring is again formed into a solution to recrystallize the metal structure. After that, the solution ring is corrected to a predetermined peripheral length, and metal rings with different peripheral lengths are manufactured little by little, and further, aging treatment and nitriding treatment are performed to improve hardness and wear resistance. .

  The rolling of the endless band-shaped metal ring is a process of rolling the plate thickness to about half and the circumference to about double without changing the plate width of the ring material, as shown in FIG. A rolling device that can be simultaneously pulled while crushing is used (see, for example, Patent Documents 1 and 2). In this rolling apparatus, a pair of tension rollers 3 and 4 around which the metal ring 1 is stretched, a rolling roller 5 disposed between the tension rollers 3 and 4, and the metal ring 1 is sandwiched with the rolling roller 5. And a reduction roller 6 for rolling. In this rolling apparatus, the cylinder 7 is driven so that the tension roller 3 is separated from the tension roller 4 in the horizontal direction. Further, the rolling cylinder 8 is driven so as to bring the rolling roller 5 into contact with the metal ring 1 via the reduction roller 6 and further press the metal ring 1.

  In such a rolling apparatus, the metal ring 1 is stretched over and removed from the tension rollers 3 and 4 as shown in FIG. A metal ring charging / discharging device having a clamping means 9 for clamping the ring 1 has been reported (for example, see Patent Document 3). According to this metal ring loading / unloading device, the metal ring can be quickly loaded and dispensed with high accuracy.

  However, in the metal ring charging / discharging device, as shown in FIG. 6, when rolling ring materials having different circumferential lengths, it is necessary to change the arrangement of the clamping means from the viewpoint of stability during transportation. In addition, since the proper arrangement of the rollers and the clamping means inside the ring material is different, the setup change operation has to be performed according to the circumference of the ring material to be rolled.

JP 2003-305504 A JP 2008-119730 A International Publication No. 02/34479 Pamphlet

  Therefore, in view of the above-described problems, the present invention provides a metal ring that can be inserted and discharged suitably without performing setup change even when the circumference of the ring material for rolling and circumference correction is different. The object is to provide a dispensing device.

  The metal ring loading / unloading device according to the present invention includes a pair of tension rollers that support an elastic endless belt-shaped metal ring in a substantially elliptical shape, and at least one tension roller is separated from the other tension roller so that the metal ring has a predetermined shape. A metal ring loading / unloading device provided in a device including a tension roller moving unit that applies a tension roller, the clamp unit including a claw member that clamps only the outer surface of the metal ring, and the clamp unit includes the claw member The metal ring is sandwiched in a radial direction and deformed into a substantially elliptical shape including a pair of arc portions that are curved to be larger than the diameter of the tension roller and a pair of chord portions that are opposed substantially in parallel via both arc portions. The metal ring is transferred to a position including both the tension rollers, and the tension rollers are separated from each other. Thus, when the curved diameter of both arc portions of the metal ring is reduced so as to approximate the diameter of the two tension rollers, the metal ring is released and the metal rings are delivered to the two tension rollers. The metal ring is inserted, or the claw members are opposed to the outer surfaces of a pair of chord portions located between the tension rollers of the metal ring hung on the tension rollers, and the tension rollers The claw member is pressed against the outer surface of the chord portion by the restoring elasticity of the metal ring as it approaches, so that the metal ring is sandwiched, and the curved diameters of both arc portions of the metal ring are larger than the diameters of the tension rollers. When this is done, the metal ring is removed from both tension rollers, and the metal ring is paid out.

  According to the present invention, even when the circumference of the ring material for rolling and circumference correction is different, the metal ring can be charged and discharged into the rolling mill without changing the setup, so the number of steps in rolling the metal ring can be reduced. It was possible to reduce the number of parts for setup change, and to improve the productivity and cost reduction of metal rings.

It is the schematic diagram which showed each arrangement | positioning at the time of using a metal ring with a short circumference in the metal ring insertion / withdrawal apparatus of this invention. It is the schematic diagram which showed each arrangement | positioning at the time of using a metal ring with a long circumference in the metal ring insertion / withdrawal apparatus of this invention. It is sectional drawing which showed the clamp means used for the metal ring charging / discharging apparatus of this invention. It is the schematic diagram which showed the operation | movement of the rolling apparatus using the metal ring charging / discharging apparatus of this invention. It is the schematic diagram which showed each arrangement | positioning at the time of using the metal ring of short circumference in the conventional metal ring insertion / withdrawal apparatus. It is the schematic diagram which showed each arrangement | positioning at the time of using a long circumference metal ring in the conventional metal ring insertion / withdrawal apparatus. It is sectional drawing which showed the clamp means used for the conventional metal ring insertion / withdrawal apparatus.

  Hereinafter, embodiments of the metal ring charging / discharging device of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic diagram showing each arrangement when a metal ring with a short circumference is used in the metal ring loading / dispensing device of the present invention, and FIG. 2 is a diagram showing each arrangement when a metal ring with a long circumference is used. As shown in FIGS. 1 and 2, the metal ring charging / discharging device of the present invention includes a clamp means 2 having a claw member that holds only the outer surface of the metal ring 1, and is provided in a rolling device or a circumferential length correction device. It is. Such a rolling device and a peripheral length correction device include a pair of tension rollers 3 and 4 that support the metal ring 1 in a substantially elliptical shape, and a tension roller movement that can move the tension roller 3 away from the tension roller 4. Means 7, a rolling roller 5 disposed between the tension rollers 3 and 4, a backup roller 10 disposed below the rolling roller 5, and a force for sandwiching the metal ring 1 between the backup roller 10 and the rolling roller 5. And a rolling cylinder 8 for pressing the rolling roller 5 against the metal ring 1 via the rolling roller 6. Although not shown, the rolling device and the circumference correction device are provided with control means for controlling the tension roller moving means 7 and the rolling cylinder 8.

  The metal ring 1 in the present invention is an endless belt-like metal ring having elasticity, and when used for rolling, both ends of a thin plate of a steel material such as maraging steel and stainless steel are welded so as to be cylindrical, and welded. After the solution was made to homogenize the hardened part by heat, the metal ring was cut into a predetermined width to make an endless belt-like metal ring. After rolling to a predetermined thickness, solutionization was performed to recrystallize the metal structure. The metal ring 1 has a substantially annular shape when no external force is applied.

  As shown in FIG. 3, the clamping means 2 in the metal ring charging / discharging device of the present invention is composed of two claw members 13 each having a driving device 12, and only the outer surface of the annular metal ring 1. Is pressed in the radial direction to hold the metal ring 1. On the other hand, as shown in FIG. 7, the conventional clamping means is composed of two claw members 13 provided with a driving device 12, and the annular metal ring 1 is formed into an elliptical shape by using the pressing means. After the deformation, the metal ring 1 is clamped from the inner and outer surfaces at four positions of the string portion.

  When the metal ring 1 is loaded into the rolling device or the circumference correction device by the metal ring loading / unloading device according to the present invention, first, the clamping means 2 composed of two claw members is used to The ring 1 is pressed and held in the radial direction, and is formed into a substantially elliptical shape including a pair of arc portions that are curved larger than the diameters of the tension rollers 3 and 4 and a pair of chord portions that are opposed substantially in parallel via both arc portions. Deform. Thereby, the substantially elliptical metal ring 1 can be transferred to an arrangement surrounding the tension rollers 3 and 4 without contacting the tension rollers 3 and 4. Although not shown, the clamping means 2 is controlled under the control by the control means for controlling the tension roller moving means 7 and the rolling cylinder 8.

  Next, after the metal ring 1 is transferred to a position including the tension rollers 3 and 4, the tension roller 3 is separated from the tension roller 4. As a result, the major axis of the elliptical shape of the metal ring 1 becomes longer, and the curved diameters of both arc portions are reduced so as to approximate the diameters of the tension rollers 3 and 4. In this state, the clamping of the metal ring 1 by the clamping means 2 is released, the metal ring 1 is delivered to the tension rollers 3 and 4, and the insertion of the metal ring 1 is completed.

  As shown in FIG. 4, in the rolling device and the peripheral length correcting device, the tension roller 3 is separated from the tension roller 4 by the tension roller moving means 7 in a state where the metal ring 1 is stretched over the tension rollers 3 and 4. While the tension is applied to the metal ring 1, the rolling roller 5 is pressed against the metal ring 1 by the rolling cylinder 8 via the reduction roller 6, and the metal ring 1 is sandwiched between the rolling roller 5 and the backup roller 10. And the metal ring 1 can be rolled by driving the reduction roller 6 to rotate.

  Here, the rolling roller 5 is preferably a mesh roller that imparts a knurled shape to the inner peripheral surface of the metal ring 1. By setting it as this structure, a mesh shape can be transcribe | transferred to the internal peripheral surface of the metal ring 1 at the time of rolling, and a knurled shape can be provided easily. According to such a knurled shape, when a plurality of endless metal rings having different circumferential lengths are stacked little by little to form a laminated ring, oil interposed between adjacent endless metal rings can be easily retained. Can do.

  In the present invention, for example, an encoder 11 having a rack and pinion mechanism is provided, the amount of displacement of the interaxial distance between the tension rollers 3 and 4 is measured, and this value corresponds to the desired circumference of the metal ring 1. When it reaches, the rolling cylinder 8 and the tension roller moving means 6 can be stopped to end the rolling operation.

  On the other hand, when the metal ring 1 is discharged from the rolling device or the peripheral length correcting device by the metal ring loading / unloading device of the present invention, first, the tension rollers 3 and 4 of the metal ring 1 stretched over the tension rollers 3 and 4. The claw member 2 is opposed to the outer side surfaces of the pair of string portions positioned therebetween, and the tension roller 3 is brought close to the tension roller 4. As a result, the long axis of the elliptical shape is shortened by the restoring elasticity of the metal ring 1, the curved diameters of both arc portions of the metal ring 1 are expanded from the diameters of the tension rollers 3 and 4, and the outer surface of the chord portion is clawed. The metal ring 1 is clamped by the clamping means 2 in pressure contact with the member 2. In this state, the metal ring 1 is removed from the tension rollers 3 and 4 to complete the dispensing of the metal ring.

  The metal ring loading / unloading device according to the present invention includes a pair of tension rollers for supporting an endless belt-like metal ring having elasticity in a substantially elliptical shape, and at least one tension roller being separated from the other tension roller. In the metal ring loading and unloading device provided in the apparatus including the tension roller moving means for applying a predetermined tension to the metal ring, the clamp means has a claw member that clamps only the outer surface of the metal ring. Further, a control means for controlling the tension roller moving means and the clamping means may be provided.

  The control means includes an operation of holding the metal ring in the radial direction by the claw member, a pair of arc portions that are curved larger than the diameter of the tension roller, and a pair of opposed portions that are substantially parallel to each other via the arc portions. Information for performing an operation of deforming the metal ring into a substantially elliptical shape composed of a string portion and an operation of transferring the metal ring to a position including the tension roller is stored, and the tension roller moving means stores the information. Stores information for performing an operation to reduce the curved diameters of both arc portions of the metal ring so as to approximate the diameter of the two tension rollers with the separation of the tension roller. Information for executing the operation of releasing the holding of the metal ring is stored, or it is hung on the tension rollers by the claw member. Information for performing the operation of making the claw members face each other on the outer side surfaces of the pair of string portions located between the tension rollers of the metal ring is stored and the tension roller moving means moves the two tension rollers closer to each other. The information to be executed is stored, and the claw member presses the claw member against the outer surface of the string portion by the restoring elasticity of the metal ring as the two tension rollers approach, and both arc portions of the metal ring When the curved diameter is larger than the diameters of the two tension rollers, information for executing the operation of taking out the metal ring from the tension roller is stored and controlled by these information.

  By using the control means having such a configuration, it is possible to automatically and reliably perform insertion and withdrawal of the metal ring.

DESCRIPTION OF SYMBOLS 1 ... Metal ring, 2, 9 ... Clamp means, 3, 4 ... Tension roller,
5 ... rolling roller, 6 ... reduction roller, 7 ... tension roller moving means,
8 ... Rolling cylinder, 10 ... Backup roller

Claims (2)

A pair of tension rollers for supporting an endless belt-like metal ring having elasticity in a substantially oval shape; and tension roller moving means for applying a predetermined tension to the metal ring by separating at least one tension roller from the other tension roller. In the metal ring charging / discharging device provided in the device comprising:
Clamp means having a claw member that clamps only the outer surface of the metal ring,
The clamp means includes a pair of arc portions that are clamped in a radial direction by the claw member and are curved to be larger than a diameter of the tension roller, and a pair of chord portions that are substantially parallel to each other via both arc portions. The metal ring is transferred to a position including both the tension rollers, and the curved diameters of the circular arc portions of the metal ring are increased by the separation of the two tension rollers. When reduced to approximate the diameter, the metal ring is released and the metal ring is delivered to both tension rollers, and the metal ring is inserted.
Alternatively, the claw members are opposed to the outer surfaces of a pair of string portions positioned between the two tension rollers of the metal ring hung on the two tension rollers, and the metal ring of the metal ring accompanying the approach of the two tension rollers When the claw member is pressed against the outer surface of the string portion by restoring elasticity to sandwich the metal ring, and the curved diameters of both arc portions of the metal ring are larger than the diameters of the tension rollers, the metal ring A metal ring charging / discharging device, wherein the metal ring is discharged from the tension rollers. The metal ring loading / dispensing device according to claim 1, wherein the clamping means includes two claw members.

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