JP4326674B2 - Metal sheet drum cutting device and method for cutting the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting device for a metal thin plate drum, and more specifically, a metal thin plate drum that forms an endless belt-like metal ring by cutting a drum formed in a cylindrical shape by a metal thin plate in a circumferential direction to a predetermined width. The present invention relates to a cutting device.
[0002]
[Prior art]
For example, in a power transmission belt employed in a continuously variable transmission, a laminated ring formed by laminating a plurality of metal rings is used in order to bind together a plurality of elements arranged in an annular manner. The metal ring constituting this type of laminated ring is formed by cutting a cylindrical drum formed by welding both end edges of a rectangular metal thin plate into a ring shape at predetermined widths.
[0003]
Conventionally, when forming a metal ring by cutting a cylindrical drum every predetermined width, cutting is performed by pressing a rotating grindstone or the like from the outside of the drum and moving it in the circumferential direction of the drum. Are known.
[0004]
However, when a grindstone or the like is pressed from the outside of the drum, there is a disadvantage that a relatively large number of burrs are generated at the cutting edge. Furthermore, since the drum is formed of a thin plate, there is a disadvantage that it is easily distorted when a grindstone or the like is pressed and the cutting accuracy is low. Moreover, since a burr is formed toward the inner peripheral side of the metal ring by pressing a grindstone or the like from the outside of the drum, for example, even if barrel polishing or the like is used for deburring, the media hits the burr. It is difficult and requires a long time for deburring.
[0005]
[Problems to be solved by the invention]
In order to eliminate such inconvenience, the present invention not only reduces the occurrence of burrs, but also can form burrs in a state where they can be easily removed, and enables a quick and highly accurate cutting operation. An object of the present invention is to provide a thin plate drum cutting device and a cutting method thereof.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention is a metal thin plate drum cutting device that forms an endless belt-like metal ring by cutting a drum formed cylindrically from a metal thin plate in a circumferential direction to a predetermined width. there are, a cylindrical rotatable blade against the roll with a contact surface abutting on the outer circumferential surface of the drum on the periphery, along the inside of the drum in response to the blade against the roll to one side wall of the blade against the roll A cutting blade roll that can be cut into the drum and can move forward and backward in the radial direction of the drum, a pressing means that presses the cutting blade roll to advance in the cutting direction, and the blade abutment roll and the cutting blade roll are integrated with the periphery of the drum. Drive means for rotationally driving in the direction.
[0007]
According to the present invention, the contact surface of the blade contact roll comes into contact from the outside of the drum, and the cutting blade roll is pressed from the inside of the drum by the pressing means. Then, by rotating the cutting blade roll and the blade contact roll in the circumferential direction of the drum by the driving means, the drum is cut into a ring shape to form a metal ring.
[0008]
At this time, since the drum is cut while cutting along one side wall of the blade support roll by the cutting blade roll, the generation of burrs is less than cutting by a grindstone or the like, and the cutting blade roll cuts from the inside of the drum. , Burr is formed toward the outside of the metal ring.
[0009]
Thereby, for example, even when barrel polishing or the like is adopted for the deburring process, the medium easily hits the burr, and the deburring process can be performed in a short time, so that the working efficiency can be improved.
[0010]
In the present invention, a plurality of the blade contact rolls and the cutting blade rolls are provided at a predetermined interval in the circumferential direction of the drum. In this way, since a plurality of cuts can be formed at a time in the circumferential direction of the drum, when the blade contact roll and the blade roll are rotated by the drive means, the rotation of the blade contact roll and the blade roll The working efficiency can be improved by reducing the angle and enabling a quick cutting operation.
[0011]
Further, in the present invention, the pressing means is provided with a holding member that holds the cutting blade roll at a tip portion and is movable in the radial direction of the drum, and is movable forward and backward along the axis of the drum. An advancing / retreating block formed with an inclined surface that slidably contacts the rear end of the member and presses the cutting blade roll toward the drum according to advancement / retraction, and a rear end of the holding member on the inclined surface of the advancement / retraction block And an urging means for urging the holding member in a direction in which they are pressed against each other.
[0012]
By configuring the pressing means in this way, the cutting blade roll can be rapidly advanced and retracted toward the drum only by advancing and retracting the advance / retreat block. That is, the holding member of the cutting blade roll slides along the inclined surface by the advance / retreat of the advance / retreat block, and is moved in the radial direction of the drum according to the inclined surface. At this time, since the holding member is urged by the urging means in the direction of pressure contact with the inclined surface of the advance / retreat block, the holding member can be reliably slid along the inclined surface.
[0013]
In the present invention, an elastic member that presses against the contact surface of the blade contact roll via the drum and causes the cutting blade of the cutting blade roll to protrude in a cutting direction into the drum by compression deformation is provided as the cutting blade. It is characterized by being integrally provided on one side wall of the roll. According to this, prior to the cutting blade roll being pressed inside the drum and starting cutting, the elastic member is pressed against the inner surface of the drum corresponding to the blade contact roll. Thereafter, when the cutting blade roll is pressed inside the drum, the cutting blade roll cuts into the drum, while the elastic member is kept in pressure contact with the inner surface of the drum. As a result, when the cutting blade roll cuts into the drum, the thin plate-like drum is prevented from being deformed in the vicinity of the cutting position, and the drum can be cut without causing waves or bending during cutting. An accurate metal ring can be cut and formed.
[0014]
The present invention also relates to a method for cutting a metal thin plate drum in which an endless belt-shaped metal ring is formed by cutting a drum formed in a cylindrical shape from a metal thin plate in a circumferential direction to a predetermined width. A step of abutting a rotatable blade contact roll on the side surface, a step of pressing a cutting blade roll along one side wall of the blade contact roll from the inside of the drum and cutting the drum into the drum, and a cutting end by the cutting blade roll A step of rotating the blade contact roll and the cutting blade roll integrally in the circumferential direction of the drum while forming burrs formed on the edge toward the outside of the drum.
[0015]
According to the method of the present invention, the burr formed on the cutting edge of the metal ring is directed outward by cutting a cutting blade roll from the inside of the drum. Thereby, for example, when barrel polishing or the like is adopted for the deburring process, the media easily hits the burr from the outside of the metal ring, and the deburring process can be performed efficiently and in a short time.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal cross-sectional explanatory view showing a schematic configuration of the apparatus of this embodiment, FIG. 2 is an explanatory view taken along the arrow II in FIG. 1, and FIG. 3 is an explanatory view showing the operation of the main part of this embodiment.
[0017]
As shown in FIG. 1, the cutting device 1 of the present embodiment includes a drum support means 3 that clamps a rear end portion of a drum 2 formed in a cylindrical shape by a thin metal plate and supports the drum 2 in a non-rotatable manner, and the drum A cutting means 5 is provided which forms a metal ring 4 by cutting the tip of the drum 2 supported by the support means 3 into a predetermined width.
[0018]
The drum support means 3 is provided so as to be able to advance and retreat toward the cutting means 5 through a sliding member 7 that is guided and slid by a rail 6 extending along the axial direction of the drum 2. .
[0019]
Further, the drum support means 3 includes a diameter-enlarged collet 9 that can be expanded on a cylindrical outer frame portion 8, and a taper-shaped diameter-enlarged block 10 that is provided so as to be able to advance and retract and expand the diameter-enlarged collet 9. And a cylinder 11 that drives the diameter-enlarged block 10 forward and backward. When supporting the drum 2, the end of the drum 2 is inserted between the outer frame portion 8 and the diameter-expanded collet 9, and the diameter-expanded collet 9 is expanded by the advancement of the diameter-expanding block 10 by driving the cylinder 11. Let As a result, the drum 2 is clamped between the outer frame portion 8 and the enlarged collet 9 so as not to rotate.
[0020]
The drum support means 3 is screwed to a ball screw 13 extending along the rail 6 via a screwing member 12 provided in the sliding member 7. The ball screw 13 is rotationally driven by a motor 14, and the drum support means 3 is advanced and retracted by the rotation of the ball screw 13.
[0021]
The cutting means 5 is a drive gear that meshes with a main body 17 that is rotatably provided on a frame 15 via a bearing 16 and a driven gear 18 that is provided on the outer periphery of one end (right end in the figure) of the main body 17. 19 and a drive motor 20 connected to 19.
[0022]
As shown in FIGS. 1 and 2, an annular outer frame portion 21 is formed at the other end portion (left end portion in the figure) of the main body 17, and the outer frame portion 21 has a predetermined interval in the circumferential direction. A plurality (three in the present embodiment) of blade support rolls 22 are pivotally supported. Each blade contact roll 22 is formed in a cylindrical shape, and a contact surface 22 a (see FIG. 3) that contacts the drum 2 is formed on the periphery thereof.
An insertion portion 23 into which the end portion of the drum 2 is inserted is formed inside the outer frame portion 21, and a plurality (inward) corresponding to each blade contact roll 22 through the insertion portion 23 ( In this embodiment, three) cutting blade rolls 24 are provided.
[0023]
A urethane pad 25, which is an elastic member that rotates integrally with the cutting blade roll 24, is provided on one side wall of the cutting blade roll 24 corresponding to the blade contact roll 22, and the cutting blade roll 24 and the urethane pad 25 are held. The block 26 is rotatably supported. As shown in FIG. 2, each holding block 26 is provided so as to be able to advance and retract radially, and is biased toward the center by a plurality of return springs 27 being stretched.
[0024]
As shown in FIG. 1, each holding block 26 is slidably contacted with an inclined surface 29 provided in an advance / retreat block 28 that can advance and retreat along the axis of the drum 2. The inclined surface 29 advances each holding block 26 in the radial direction by retreating the advance / retreat block 28, and retreats each holding block 26 in the convergence direction by advancement of the advance / retreat block 28. At this time, each holding block 26 is maintained in a pressure contact state with the inclined surface 29 by the return spring 27 and reliably follows the advance / retreat of the advance / retreat block 28. The advance / retreat block 28 is integrally connected to a piston rod 31 of a cylinder 30 provided inside the main body 17, and is advanced / retreated by supplying air to the cylinder 30. In the drawing, 30a and 30b are both air supply / discharge passages to the cylinder 30, and air supply / discharge devices (not shown) are connected to both supply / discharge passages 30a and 30b.
[0025]
As shown in FIG. 2, a plurality (three in the present embodiment) of push pins 32 are provided between each blade contact roll 22 and each cutting blade roll 24. As shown in FIG. 1, each push pin 32 employs a piston of a cylinder 33. Each push pin 32 protrudes into the insertion portion 23 against the return spring 34 when air is injected into the cylinder 33, and discharges the cut metal ring 4 from the insertion portion 23. In addition, 33a in the figure is an air supply / discharge passage to the cylinder 33, and an air supply / discharge device (not shown) is connected to the supply / discharge passage 33a.
[0026]
Next, the operation of the cutting device 1 of the present embodiment and the cutting operation of the drum 2 will be described. First, referring to FIG. 1, when the drum support means 3 is in the retracted position, the diameter-enlarged block 10 is retracted so that the end of the drum 2 is interposed between the outer frame portion 8 and the diameter-enlarged collet 9. insert. Next, the end of the drum 2 is clamped by advancing the diameter expanding block 10 and expanding the diameter expanding collet 9, and the drum 2 is supported in a non-rotatable state. Subsequently, the drum support means 3 supporting the drum 2 moves forward and inserts the tip end portion of the drum 2 into the insertion portion 23 formed in the main body 17 of the cutting means 5. At this time, the end portion of the drum 2 is brought into contact with the blade contact roll 22 in the insertion portion 23.
[0027]
Next, the advance / retreat block 28 of the cutting means 5 is retracted. As a result, as shown in FIG. 2, the cutting blade roll 24 advances in the radial direction toward the blade contact roll 22 via the holding block 26. At this time, first, as shown in FIG. 3A, the urethane pad 25 comes into contact with the contact surface 22 a of the blade contact roll 22 through the drum 2. Further, when the advance / retreat block 28 is retracted, the urethane pad 25 presses the drum 2 against the contact surface 22 a of the blade contact roll 22. As a result, the drum 2 near the cutting position is prevented from being bent. When the advancing / retreating block 28 is further retracted, the urethane pad 25 is compressed and deformed, and as shown in FIG. 3B, the cutting blade roll 24 moves from the inside of the drum 2 to one side wall (see FIG. Cutting along the middle left wall) starts cutting the drum 2.
[0028]
Next, as shown in FIGS. 1 and 2, the main body 17 of the cutting means 5 is rotated through the drive gear 19 and the driven gear 18 by driving the drive motor 20. Thereby, the cutting by the cutting blade roll 24 proceeds over the entire circumference of the drum 2, and the metal ring 4 held in the insertion portion 23 is formed. At this time, in this embodiment, as shown in FIG. 2, if the three cutting blade rolls 24 are provided at equal intervals, the main body 17 of the cutting means 5 can be rotated at an angle of 120 °, the drum 2 The metal ring 4 can be cut and formed in a relatively short time.
[0029]
Referring to FIG. 1, when the drum support means 3 is retracted and the front of the main body 17 of the cutting means 5 is released, air is supplied to the cylinder 33 of the push pin 32 to urge the return spring 34. Accordingly, the push pin 32 protrudes from the insertion portion 23, and the metal ring 4 is paid out from the insertion portion 23.
[0030]
As shown in FIG. 3B, the metal ring 4 cut and formed as described above is cut by the cutting blade roll 24 by press-contacting between the contact surface 22 a of the blade contact roll 22 and the urethane pad 25 as shown in FIG. Therefore, even if the drum 2 has a thin plate-like peripheral wall that is very easily deformed, the metal ring 4 having a high cutting accuracy is formed. Further, by cutting the drum 2 with a cutting blade roll 24 that cuts from the inside, a burr can be formed on the cutting edge of the metal ring 4 so as to project outward from the peripheral edge. As a result, in the deburring process by barrel polishing or the like in the subsequent process, the medium sufficiently comes into contact with the burr, so that the deburring process can be performed in a short time.
[0031]
In the present embodiment, the urethane pad 25 that is brought into pressure contact with the blade pad roll 22 is provided. However, instead of the urethane pad 25, another synthetic resin or a rubber elastic member may be employed. Moreover, in this embodiment, although what provided the three cutting blade rolls 24 and the blade contact roll 22 at equal intervals was shown, it is not restricted to this, The cutting blade roll 24 and the blade contact roll 22 are one or more. What is necessary is just to be provided.
[Brief description of the drawings]
FIG. 1 is a longitudinal cross-sectional explanatory diagram showing a schematic configuration of an apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory view taken along the arrow II in FIG.
FIG. 3 is an explanatory diagram showing an operation of a main part of the present embodiment device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Cutting device, 2 ... Drum, 4 ... Metal ring, 20 ... Drive motor (driving means), 22 ... Blade application roll, 24 ... Cutting blade roll, 25 ... Urethane pad (elastic member), 26 ... Holding block (holding) Members), 27 ... return springs (biasing means), 28 ... advance / retreat block, 29 ... inclined surface.

Claims (5)

A metal thin plate drum cutting device for forming an endless belt-like metal ring by cutting a drum formed in a cylindrical shape by a metal thin plate in a circumferential direction to a predetermined width,
A cylindrical, rotatable blade pad roll provided with a contact surface on the periphery thereof that contacts the outer peripheral side surface of the drum;
A cutting blade roll that can be rotated into the drum along the one side wall of the blade holding roll from the inside of the drum and can move forward and backward in the radial direction of the drum corresponding to the blade holding roll;
Pressing means for pressing the cutting blade roll to advance in the cutting direction;
A metal thin plate drum cutting apparatus, comprising: a driving unit that integrally rotates the blade contact roll and the cutting blade roll in the circumferential direction of the drum.   2. The metal sheet drum cutting device according to claim 1, wherein a plurality of the blade contact rolls and the cutting blade rolls are provided at predetermined intervals in the circumferential direction of the drum. The pressing means is configured to hold the cutting blade roll at a tip portion and move in a radial direction of the drum; and
An advancing / retreating block provided so as to be movable back and forth along the axis of the drum, and formed with an inclined surface that slidably contacts the rear end of the holding member and presses the cutting blade roll toward the drum in accordance with the advancement / retraction. When,
The metal thin plate drum cutting device according to claim 1 or 2, further comprising a biasing unit that biases the holding member in a direction in which the rear end of the holding member is pressed against the inclined surface of the advance / retreat block. apparatus. An elastic member that presses against the contact surface of the blade contact roll through the drum and projects the cutting blade of the cutting blade roll in a cutting direction into the drum by compressive deformation is integrated with one side wall of the cutting blade roll. The metal thin plate drum cutting device according to any one of claims 1 to 3, wherein the metal thin plate drum cutting device is provided. A metal thin plate drum cutting method for forming an endless belt-shaped metal ring by cutting a drum formed in a cylindrical shape with a metal thin plate in a circumferential direction to a predetermined width,
A step of contacting a rotatable blade contact roll to the outer peripheral side surface of the drum;
A step of pressing the cutting blade roll along the one side wall of the blade contact roll from the inside of the drum and cutting it into the drum;
A step of rotating the blade contact roll and the cutting blade roll integrally in the circumferential direction of the drum while forming a burr formed on the cutting edge by the cutting blade roll toward the outside of the drum. A method for cutting a metal sheet drum.

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