JP2001353612A - Metal sheet drum cutting device, and cutting method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal sheet drum cutting device which can reduce the generation of burrs, form burrs in an easily removable manner, and enables the rapid cutting with high accuracy, and a cutting method thereof. SOLUTION: This metal sheet drum cutting device comprises a rotatable blade-setting roll 22 abutted on an outer circumferential side surface of a metal sheet drum 2 and a cutting blade roll 24 which is cut in and rotatable along a side wall of the blade-setting roll 22 from the inside of the drum corresponding to the blade-setting roll 22 and advancing/retractable in the radial direction of the drum 2. It further comprises a pressing means 28 for pressing the cutting blade roll 24 and advancing it in the cutting-in direction, and a driving means 20 for integrally rotating the blade-setting roll 22 and the cutting blade roll 24 in the circumferential direction of the drum 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a metal thin-plate drum, and more particularly, to an endless band-shaped metal ring formed by cutting a cylindrical drum made of a metal thin plate into a predetermined width in a circumferential direction. The present invention relates to an apparatus for cutting a metal sheet drum for forming a sheet metal.

[0002]

2. Description of the Related Art For example, in a power transmission belt used in a continuously variable transmission, a plurality of metal rings are stacked in order to integrally bind a plurality of elements arranged in an annularly stacked arrangement. A ring is used. A metal ring constituting this type of laminated ring is formed by cutting a cylindrical drum formed by welding and joining both end edges of a rectangular metal thin plate into a ring shape at predetermined intervals.

Conventionally, when forming a metal ring by cutting a cylindrical drum at predetermined intervals, a rotating grindstone or the like is pressed from the outside of the drum and moved in the circumferential direction of the drum. It is known to

However, when a grindstone or the like is pressed against the outside of the drum, there is a disadvantage that a relatively large amount of burrs are generated at the cutting edge. Further, since the drum is formed of a thin plate, it tends to be distorted when pressing a grindstone or the like, and there is a disadvantage that the cutting accuracy is low. Moreover, since the burrs are 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 employed for deburring, the media hits the burrs. It is difficult and it takes a long time for deburring.

[0005]

According to the present invention, by solving such inconveniences, it is possible to form burrs in a state in which the burrs can be easily removed as well as to minimize the occurrence of burrs. It is an object of the present invention to provide a metal thin-plate drum cutting device and a cutting method thereof capable of performing an accurate cutting operation.

[0006]

In order to achieve the above object, the present invention is to form an endless strip-shaped metal ring by cutting a cylindrical drum made of a thin metal plate into a predetermined width in the circumferential direction. Metal thin plate drum cutting device,
A column-shaped rotatable blade contact roll having an abutment surface on its periphery, which abuts against the outer peripheral side surface of the drum, and along one axial side wall of the blade contact roll from the inside of the drum corresponding to the blade contact roll. A rotatable cutting blade roll that cuts into the drum and is capable of moving back and forth in the radial direction of the drum, pressing means for pressing the cutting blade roll to advance in the cutting direction, and the blade abutment roll and the cutting blade roll integrally formed around the drum. And a driving means for driving to rotate in the direction.

According to the present invention, the contact surface of the blade contact roll comes into contact with 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.

At this time, the drum is cut while being cut along one side wall in the axial direction of the blade contact roll by the cutting blade roll. Is formed from the inside of the metal ring toward the outside of the metal ring.

Thus, for example, even when barrel polishing or the like is employed in 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.

Further, in the present invention, a plurality of the blade contact rolls and the cutting blade rolls are provided at predetermined intervals in a circumferential direction of the drum. By doing so, a plurality of cuts can be formed at one time in the circumferential direction of the drum, so that when the driving means rotates the blade contact roll and the cutting blade roll, the rotation of the blade contact roll and the cutting blade roll The work efficiency can be improved because the angle can be reduced and a quick cutting operation can be performed.

[0011] In the present invention, the pressing means includes:
A holding member that holds the cutting blade roll at a leading end thereof and is movable in the radial direction of the drum, and is provided so as to be able to advance and retreat along the axis of the drum, and slidably abuts a rear end of the holding member. A reciprocating block formed with an inclined surface for pressing the cutting blade roll toward the drum in accordance with advance and retreat, and urging the holding member in a direction to press the rear end of the holding member against the inclined surface of the advancing and retreating block. And a biasing means for performing the operation.

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 and retreat block. That is, as the advancing / retreating block moves, the holding member of the cutting blade roll slides along the inclined surface, 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 pressing against the inclined surface of the advance / retreat block, the holding member can be reliably slid along the inclined surface.

Further, in the present invention, an elastic member which 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 to the drum by compressive deformation, The cutting blade roll is provided integrally on one axial side wall. According to this,
Prior to the cutting blade roll being pressed inside the drum to start 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 into the inside of the drum, the cutting blade roll cuts into the drum, while maintaining the state in which the elastic member is pressed against the inner surface of the drum. Thereby, when the cutting blade roll cuts into the drum, the thin plate-shaped drum is prevented from being deformed in the vicinity of the cutting position, and the drum can be cut without generating waviness or bending at the time of cutting. An accurate metal ring can be cut and formed.

The present invention is also a method of cutting a metal thin plate drum which cuts a cylindrical drum made of a metal thin plate in a circumferential direction to a predetermined width to form an endless metal ring. A step of abutting a rotatable blade contact roll on the outer peripheral side surface of the drum; and A step of forming the burrs formed at the cutting edges by the cutting blade roll toward the outside of the drum, and integrally rotating the blade contact roll and the cutting blade roll in the circumferential direction of the drum. I do.

According to the method of the present invention, the burrs formed at the cutting edge of the metal ring are directed outward by cutting the cutting blade roll from the inside of the drum. Thus, for example, when barrel polishing or the like is employed in the deburring process, the medium easily hits the burr from outside the metal ring, and the deburring process can be performed efficiently and in a short time.

[0016]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional explanatory view showing a schematic configuration of the apparatus of the present embodiment, FIG. 2 is an explanatory view taken along the arrow II in FIG.
FIG. 3 is an explanatory view showing the operation of the main part of the present embodiment.

As shown in FIG. 1, a cutting device 1 of the present embodiment comprises a drum 2 formed of a thin metal plate and having a cylindrical shape.
A drum support means 3 for clamping the rear end of the drum 2 so as to support it in a non-rotatable manner, and a cutting for cutting the leading end of the drum 2 supported by the drum support means 3 into a predetermined width to form a metal ring 4 Means 5.

The drum supporting means 3 is provided movably toward and away from the cutting means 5 via a sliding member 7 which is guided by a rail 6 extending along the axial direction of the drum 2 and slides. Have been.

The drum supporting means 3 has a diameter-expanding collet 9 which can be freely expanded in a cylindrical outer frame portion 8 and a tapered diameter-expanding which is provided so as to be able to advance and retreat. A block 10 and a cylinder 11 that drives the block 10 to move forward and backward are provided. When the drum 2 is supported, the end of the drum 2 is inserted between the outer frame 8 and the expanding collet 9, and the expanding block 10 is advanced by driving the cylinder 11 to expand the expanding collet 9. Let it. As a result, the drum 2 is non-rotatably clamped between the outer frame portion 8 and the enlarged diameter collet 9.

The drum supporting means 3 is screwed to a ball screw 13 extending along the rail 6 via a screwing member 12 provided on the sliding member 7. The ball screw 13 is rotationally driven by a motor 14, and the rotation of the ball screw 13 causes the drum supporting means 3 to move forward and backward.

The cutting means 5 meshes with a main body 17 rotatably provided on a frame 15 via a bearing 16 and a driven gear 18 provided on the outer periphery of one end (right end in the figure) of the main body 17. And a drive motor 20 connected to the drive gear 19.

As shown in FIG. 1 and FIG.
An annular outer frame portion 21 is formed at the other end (the left end portion in the figure), and a plurality (three in this embodiment) of the outer frame portion 21 are arranged at predetermined intervals in the circumferential direction. The blade contact roll 22 is pivotally supported. Each blade contact roll 22 is formed in a columnar shape, and has a contact surface 22 a that contacts the drum 2 around its periphery.
(See FIG. 3). An insertion portion 23 into which the end of the drum 2 is inserted is formed inside the outer frame portion 21, and each blade contact roll 22 is inserted through the insertion portion 23.
Inside (corresponding to three in this embodiment)
The cutting blade roll 24 is provided.

The blade contact roll 22 of the cutting blade roll 24
A urethane pad 25 which is an elastic member that rotates integrally with the cutting blade roll 24 is provided on one side wall corresponding to the cutting blade roll 24, and the cutting blade roll 24 and the urethane pad 25
It is supported rotatably. Each holding block 26
As shown in FIG. 2, each is provided so as to be able to advance and retreat radially, and is biased toward the center by a plurality of return springs 27 being hung.

As shown in FIG. 1, each of the holding blocks 26 is an advancing / retreating block 2 that is movable back and forth along the axis of the drum 2.
8 is slidably in contact with an inclined surface 29 provided in the apparatus 8. The inclined surface 29 causes each holding block 26 to advance in the radial direction by retreating the advance / retreat block 28, and
, The respective holding blocks 26 are retracted in the convergence direction. At this time, each holding block 26 is maintained in a state of being pressed against 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 driven forward / backward by supply of air to the cylinder 30.
In the drawings, reference numerals 30a and 30b denote air supply / discharge paths to the cylinder 30, and an air supply / discharge device (not shown) is connected to each of the supply / discharge paths 30a and 30b.

As shown in FIG. 2, a plurality (three in this embodiment) of push pins 32 are provided between each blade contact roll 22 and each cutting blade roll 24. Each push pin 32 employs a piston of a cylinder 33 as shown in FIG. Each of the push pins 32 is configured to return the return spring 3 by injecting air into the cylinder 33.
4 protrudes into the insertion portion 23 against the metal ring 4 after cutting.
From the insertion portion 23. In the drawing, reference numeral 33a denotes an air supply / discharge path to the cylinder 33, and an air supply / discharge device (not shown) is connected to the supply / discharge path 33a.

Next, the operation of the cutting device 1 and the cutting operation of the drum 2 according to the present embodiment will be described. First, referring to FIG. 1, when the drum supporting means 3 is at the retracted position, the enlarged block 10 is retracted, and the end of the drum 2 is moved between the outer frame 8 and the enlarged collet 9. insert. Next, by expanding the diameter expanding block 10 to expand the diameter of the diameter expanding collet 9, the end of the drum 2 is clamped, and the drum 2 is supported in a non-rotatable state. Then, drum 2
The drum supporting means 3 supporting the cutting means 5 advances and inserts the leading end of the drum 2 into the insertion portion 23
Insert At this time, the end of the drum 2 is brought into contact with the blade contact roll 22 in the insertion portion 23.

Next, the advance / retreat block 28 of the cutting means 5 is retracted. As a result, as shown in FIG.
Into the radial direction. And at this time,
First, as shown in FIG. 3A, the urethane pad 25 contacts the contact surface 22 a of the blade contact roll 22 via 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 advance / retreat block 28 is further retracted, the urethane pad 25 is compressed and deformed, and the cutting blade roll 24 is moved from the inside of the drum 2 in the axial direction of the blade contact roll 22 as shown in FIG. The cutting is performed along the side wall (the left side wall in the figure), and the cutting of the drum 2 is started.

Next, as shown in FIGS. 1 and 2, the driving gear 20 and the driven gear 1 are driven by the driving of the driving motor 20.
The body 17 of the cutting means 5 is rotated via 8. As a result, 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 the present embodiment, as shown in FIG. 2, by providing three cutting blade rolls 24 at equal intervals, the main body 17 of the
By rotating at an angle of 0 °, the entire circumference of the drum 2 can be cut,
The metal ring 4 can be cut and formed in a relatively short time.

Referring to FIG. 1, when the drum supporting 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 and the return spring 34 The push pin 32 protrudes into the insertion portion 23 against the bias, and the metal ring 4 is discharged from the insertion portion 23.

As shown in FIG. 3B, the metal ring 4 cut and formed as described above has a blade contact roll 22 as shown in FIG.
By pressing and holding the contact surface 22a and the urethane pad 25, the drum 2 is prevented from waving or distorted at the time of cutting by the cutting blade roll 24, so that the drum 2 has a thin plate-shaped peripheral wall which is extremely easily deformed. Even if there is, a metal ring 4 with high cutting accuracy is formed. Further, by cutting the drum 2 with a cutting blade roll 24 that cuts the drum 2 from the inside, burrs can be formed on the cut edge of the metal ring 4 so as to project outward from the peripheral edge thereof, though not shown.
This allows the medium to sufficiently contact the burr in the deburring process by barrel polishing or the like in a later step, so that the deburring process can be performed in a short time.

In the present embodiment, the urethane pad 25 is provided to be brought into pressure contact with the blade contact roll 22. However, instead of the urethane pad 25, another elastic member made of synthetic resin or rubber may be employed. . In the present embodiment, three cutting blade rolls 24 and blade contact rolls 22 are provided at equal intervals, but the present invention is not limited to this, and one or more cutting blade rolls 24 and blade contact rolls 22 are provided. What is necessary is just to be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional explanatory view showing a schematic configuration of an apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram as indicated by an arrow II in FIG. 1;

FIG. 3 is an explanatory diagram showing an operation of a main part of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cutting device, 2 ... Drum, 4 ... Metal ring, 20 ... Drive motor (drive means), 22 ... Blade contact roll, 24 ... Cutting blade roll, 25 ... Urethane pad (elastic member), 26 ...
Holding block (holding member), 27: return spring (biasing means), 28: forward / backward block, 29: inclined surface.

Claims (5)

[Claims] An apparatus for cutting a thin metal drum formed by cutting a cylindrical drum made of a thin metal plate into a predetermined width in a circumferential direction to form an endless metal ring, wherein an outer peripheral side surface of the drum is provided. A column-shaped rotatable blade contact roll provided on the periphery with an abutting surface for contacting the blade, a rotation corresponding to the blade contact roll, cutting the drum from the inside of the drum along one axial side wall of the blade contact roll into the drum A cutting blade roll that can freely move back and forth in the radial direction of the drum, pressing means for pressing the cutting blade roll to advance in the cutting direction, and rotating the blade contact roll and the cutting blade roll integrally in the circumferential direction of the drum A cutting device for a metal thin-plate drum, comprising: 2. A cutting device for a metal thin plate drum according to claim 1, wherein a plurality of said blade contact rolls and said cutting blade rolls are provided at predetermined intervals in a circumferential direction of said drum. . 3. The pressing means is provided with a holding member which holds the cutting blade roll at a tip portion and is movable in a radial direction of the drum, and which is provided so as to be able to advance and retreat along an axis of the drum. An advancing / retracting block formed with an inclined surface that slidably abuts the rear end of the cutting blade roll toward the drum in accordance with the advancing / retracting; and a rear end of the holding member on the inclined surface of the advancing / retracting block. The device for cutting a metal thin plate drum according to claim 1 or 2, further comprising: an urging means for urging the holding member in a direction in which the holding member is pressed. 4. An elastic member which 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 to the drum by compression deformation, comprises an elastic member of the cutting blade roll. The cutting device for a metal thin-plate drum according to claim 1, wherein the cutting device is integrally provided on one side wall in the axial direction. 5. A method for cutting a metal thin plate drum, wherein a drum formed into a cylindrical shape by a metal thin plate is circumferentially cut to a predetermined width to form an endless band-shaped metal ring. Abutting a rotatable blade contact roll on the drum; pressing the cutting blade roll from inside the drum along one axial side wall of the blade contact roll to cut into the drum; Rotating the blade contact roll and the cutting blade roll integrally in the circumferential direction of the drum while forming burrs formed on the cutting edge toward the outside of the drum. Drum cutting method.