JP5112995B2 - Metal sheet drum cutting device - Google Patents

Description

  The present invention relates to a cutting apparatus for a metal thin plate drum that forms an endless belt-shaped metal ring by cutting a drum formed in a cylindrical shape by a metal thin plate in a circumferential direction at predetermined widths.

  For example, in a power transmission belt employed in a continuously variable transmission of an automobile, a plurality of metal ring members are laminated in order to bind together a plurality of elements arranged in an annular manner. Laminated rings are used. As the metal ring member constituting this type of laminated ring, a cylindrical drum formed by welding and joining both end edges of a rectangular metal thin plate is cut into a ring shape in the circumferential direction for each predetermined width. An endless strip-shaped metal ring (hereinafter, simply referred to as “metal ring”) may be used.

  Conventionally, when forming a metal ring by cutting a cylindrical drum in a circumferential direction at predetermined widths, one end of the drum is clamped and instructed, while a rotating grindstone 41 shown in FIG. There is known an apparatus for cutting by contacting the outer peripheral surface of the other end of the drum and moving the grindstone 41 in the circumferential direction of the drum. However, when the drum is cut using the grindstone 41, the grinding portion 42 of the grindstone 41 is flat, so a grinding allowance corresponding to the width of the grinding portion 42 is required, and one drum There is a problem that the yield of the metal ring obtained from is reduced.

  Therefore, instead of the grindstone, a device is known that cuts the drum into a ring shape by abutting and shearing a cutting blade roll on the inner peripheral surface of the drum (see, for example, Patent Document 1).

  Further, as shown in FIG. 4 (b), a pressing blade 43 having an acute angled chevron shape is brought into contact with the outer peripheral surface of the drum and pushed from one side to cut the drum into a circular cut. An apparatus is known (see, for example, Patent Document 2). In the press cutting blade 43, the inclined surfaces 45, 45 on both sides of the ridge 44 are ground surfaces in the chevron shape.

However, in the conventional apparatus for cutting the drum in a ring shape, the formed metal ring may be damaged by coming into contact with the cutting blade roll provided on the inner peripheral surface of the drum, and improvement is desired.
JP 2001-353612 A JP 2005-254355 A

  In view of the above-described circumstances, the present invention provides a cutting device for a metal thin plate drum that can prevent a formed metal ring from coming into contact with and being damaged by a blade provided on an inner peripheral surface of the drum. For the purpose.

  In order to achieve such an object, a metal thin plate drum cutting apparatus according to the present invention holds a drum formed in a cylindrical shape by a metal thin plate, and is provided with a drum holding means rotatably provided, and the drum holding device. A pair of rotatable cutting tools which are in contact with the inner and outer peripheral surfaces of the cutting position of the drum held by the member and cut the drum, and the drum is arranged in the circumferential direction every predetermined width. A metal thin plate drum cutting device that forms an endless belt-shaped metal ring by cutting, and an electric current can be intermittently provided below the outer peripheral surface of the end of the drum at the cutting position held by the drum holding means. Discharging means comprising a certain electromagnet and a transfer member for transporting the electromagnet to the dispensing position is provided, and a metal ring formed by cutting the drum on the electromagnet previously energized after completion of cutting the drum The magnet And is held by the electromagnet holding the metal ring is transferred to the payout position by said transfer member, characterized in that paying out the metal ring 該払 search position by interrupting the power supply to the electromagnet.

  In the cutting device of the present invention, the drum formed in a cylindrical shape by a metal thin plate is held by the drum holding means, and the pair of rotatable blade tools are provided at cutting positions on the inner and outer peripheral surfaces of the drum. By contacting the drum, the drum is cut in the circumferential direction at predetermined widths to form an endless belt-like metal ring. At this time, an electromagnet that allows the current of the discharging means to be intermittently arranged is arranged below the outer peripheral surface of the cutting position side end of the drum held by the drum holding means. Accordingly, by previously energizing the electromagnet, after the cutting of the drum is completed, the metal ring formed by the cutting is magnetized and held on the electromagnet. By doing in this way, the said cutting device can prevent that the formed metal ring contacts the blade tool provided in the drum internal peripheral surface by the said discharge | payout means, and is damaged.

  Next, the electromagnet holding the metal ring is transferred to the payout position by the transfer member, and the current supply to the electromagnet is cut off, whereby the metal ring is paid out. By transferring the metal ring held by the electromagnet to the payout position and then paying it out, it is possible to prevent the metal ring from dropping and being damaged.

  Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is an explanatory cross-sectional view showing a configuration of a cutting device for a metal thin plate drum according to the present embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. It is explanatory drawing which shows the contact state of.

  As shown in FIG. 1, the cutting device 1 of the present embodiment is used for cutting a thin metal plate drum 2 in a circumferential direction at predetermined widths, and includes a drum holding unit 3 that holds the drum 2, and A pair of rolling cutters 4 a and 4 b that contact the inner and outer peripheral surfaces of the cutting position of the drum 2 to cut the drum 2, a cutter driving unit 5 that drives the rolling cutters 4 a and 4 b, Dispensing means 7 for dispensing the endless belt-shaped metal ring 6 formed by cutting is provided. In the cutting device 1 of the present embodiment, the rolling cutters 4a and 4b have the same shape as the pressing blade tool 43 shown in FIG.

  The drum holding unit 3 includes a pressure contact member 8 that is pressed against the outer peripheral surface of the drum 2, and a collet 9 that moves the pressure contact member 8 forward and backward with respect to the outer peripheral surface of the drum 2. In addition, in order to show the contact state of the rolling cutters 4a and 4b with respect to the drum 2, the drum holding member 3 is notched and shown as a cross section. The pressure contact member 8 is provided with a tapered surface 8a having an enlarged diameter from the opposite side of the rolling cutters 4a and 4b toward the rolling cutters 4a and 4b on the outer peripheral surface at the end of the rolling cutters 4a and 4b. It is urged by the means in a direction away from the outer peripheral surface of the drum 2. On the other hand, the collet 9 is provided with a tapered surface 9a whose diameter increases from the opposite side of the rolling cutters 4a, 4b toward the rolling cutters 4a, 4b on the inner peripheral surface, and the tapered surface 9a is in sliding contact with the tapered surface 8a. The collet 9 is engaged with an engagement member 11 attached to a cylinder rod 10 a of the cylinder 10, and can be moved back and forth by the cylinder 10.

  When the collet 9 is advanced by the cylinder 10, it moves to the rolling cutters 4 a and 4 b side, presses the tapered surface 8 a via the tapered surface 9 a, and presses the pressure contact member 8 against the outer peripheral surface of the drum 2. Further, when the collet 9 is retracted by the cylinder 10, the collet 9 moves to the opposite side of the rolling cutters 4a and 4b to release the pressing of the tapered surface 8a by the tapered surface 9a. At this time, the pressing member 8 is moved in a direction away from the outer peripheral surface of the drum 2 by a biasing force of a biasing means (not shown).

  A gear 12 is provided on the outer peripheral surface of the pressure contact member 8, and the gear 12 meshes with a gear 13 a attached to the rotating shaft of the motor 13 while the pressure contact member 8 is in pressure contact with the outer peripheral surface of the drum 2. By doing so, the drum 2 is rotated with the rotation of the motor 13.

  The cutter drive unit 5 is provided so as to face the end of the drum 2 held by the drum holding unit 3 on the side of the rolling cutters 4 a and 4 b, and includes a back plate 15 including a screw shaft 14. The screw shaft 14 has a gear 14 a attached to the end opposite to the drum holding portion 3, and the gear 14 a meshes with a gear 16 a attached to the rotation shaft of the servo motor 16. The servo motor 16 can rotate in both forward and reverse directions, and the screw shaft 14 rotates in the forward or reverse direction as the servo motor 16 rotates.

  On the other hand, the end of the screw shaft 14 on the drum holding unit 3 side is connected to a support plate 17, and the support plate 17 can be advanced and retracted according to the rotation of the screw shaft 14 by a ball screw mechanism (not shown). The support plate 17 maintains a posture so as to be perpendicular to the end portion of the drum 2 by inserting a plurality of rods 17 a provided in the vicinity of the end portion through the back plate 15.

  Support members 18a and 18b are erected on both ends of the surface of the support plate 17 on the drum holding unit 3 side, and a screw shaft 19 is pivotally supported on the support members 18a and 18b. In the screw shaft 19, a gear 20 attached to an end portion on the support member 18 a side meshes with a gear 21 a attached to a rotation shaft of a servo motor 21 attached to the support member 18 a. The servo motor 21 can rotate in both forward and reverse directions, and the screw shaft 19 rotates in the forward or reverse direction as the servo motor 21 rotates.

  A ball screw portion 22 a is attached to the support member 18 a side of the screw shaft 19, and the ball screw portion 22 a is straddled over the guide rail 23 provided on the surface of the support plate 17 on the drum holding portion 3 side. It can be moved on the guide rail 23 along with the rotation. A cutter support member 24a that rotatably supports the rolling cutter 4a that is in contact with the outer peripheral surface of the drum 2 is provided on the ball screw portion 22a.

  On the other hand, a ball screw portion 22b is attached to the support member 18b side of the screw shaft 19, and the ball screw portion 22b extends over the guide rail 23 so that it can move on the guide rail 23 as the screw shaft 19 rotates. ing. A cutter support member 24b that rotatably supports the rolling cutter 4b that is in contact with the inner peripheral surface of the drum 2 is provided on the ball screw portion 22b.

  In addition, the screw shaft 19 has the screw shaft 19a on the support member 18a side and the screw shaft 19b on the support member 18b side, the directions of the screws being reversed. As a result, the ball screw portions 22a and 22b move in directions close to each other or away from each other as the screw shaft 19 rotates.

  As shown in FIG. 2, the dispensing means 7 for dispensing the metal ring 6 is provided below the end of the drum 2 held by the drum holding unit 3 on the cutter driving unit 5 side, and is supported by the rotary shaft 25. An arm member 26 and an electromagnet 27 attached to the tip of the arm member 26 are provided. The electromagnet 27 can be intermittently supplied with electric current, is energized in advance, and stands by just below the outer peripheral surface of the end of the drum 2, and the drum 2 is cut by the rolling cutters 4 a and 4 b to form the metal ring 6. The metal ring 6 is magnetically attached and held.

  Next, the operation of the cutting device 1 of this embodiment will be described.

  In the cutting device 1, first, when the end of the drum 2 is disposed at a predetermined position where the drum 2 is cut by the rolling cutters 4 a and 4 b, the cylinder 10 is driven to advance the collet 9. In this way, the tapered surface 9 a of the collet 9 presses the tapered surface 8 a of the pressure contact member 8, so that the pressure contact member 8 is pressed against the outer peripheral surface of the drum 2 and the drum 2 is held by the pressure contact member 8.

  At this time, the rolling cutters 4a and 4b are spaced apart from each other so as not to come into contact with the drum 2, and are retracted to the outside of the drum 2 (on the right side of the drum 2 in FIG. 1) (initial position). .

  Therefore, next, the servo motor 16 is driven to move the support plate 17 in the direction of the drum 2, thereby moving the rolling cutters 4 a and 4 b supported by the cutter support members 24 a and 24 b in the direction of the drum 2. The servo motor 16 is stopped when the rolling cutters 4a and 4b reach a predetermined cutting position at an interval corresponding to the width of the metal ring 6 from the end of the drum 2.

  Next, the servo motor 21 is driven. At this time, the screw shaft 19 has a screw shaft 19a on the support member 18a side and a screw shaft 19b on the support member 18b side so that the screw directions are reversed. The ball screw 22b also moves in a direction away from the support member 18b. As a result, the rolling cutters 4a and 4b supported by the cutter support members 24a and 24b provided on the ball screw portions 22a and 22b are moved in directions close to each other, and the rolling cutter 4a is brought into contact with the outer peripheral surface of the drum 2. At the same time, the rolling cutter 4 b is brought into contact with the inner peripheral surface of the drum 2.

  At this time, when the motor 13 is driven, the drum 2 held by the pressure contact member 8 is rotationally driven. Therefore, the rolling cutters 4a and 4b in contact with the drum 2 are brought closer to each other as shown in FIG. 3 by the ball screw portions 22a and 22b while rotating with the drum 2.

  In this way, the meat of the drum 2 escapes in the axial direction on both sides of the mountain-shaped rolling cutters 4a and 4b, so that the space between the rolling cutters 4a and 4b is thin. When the gap between the rolling cutters 4a and 4b is about 0.1 mm or less, the drum 2 is naturally broken and the metal ring 6 is obtained.

  The paying-out means 7 makes the electromagnet 27 attached to the front end of the arm member 26 energized in advance, and waits immediately below the outer peripheral surface of the end portion of the drum 2. Therefore, the obtained metal ring 7 is magnetically attached and held on the electromagnet 27 that is waiting just below the outer peripheral surface of the end portion of the drum 2.

  Next, after the rolling cutters 4a and 4b are returned to the initial position by a procedure completely opposite to that described above, the arm member 26 is rotated as shown by the arrows in FIG. The ring 6 is moved to the payout position. Then, the metal ring 6 is paid out to the payout position by shutting off the power supply to the electromagnet 27 at the payout position. By doing in this way, it can prevent that the formed metal ring 6 contacts the rolling cutter 4b, or falls and is damaged.

  If the formed metal ring 6 is paid out, the payout means 7 rotates the arm member 26 again to return to the initial position directly below the drum 2 and resumes energization to the electromagnet 27.

  In the cutting device 1 of the present embodiment, the arm member 26 supported by the rotary shaft 25 is used as the transfer member, but other members may be used as long as the electromagnet 27 can be transferred to the payout position. May be.

  In the cutting apparatus 1 of the present embodiment, a pair of rolling cutters 4 a and 4 b that cut the drum 2 by being in contact with the inner and outer peripheral surfaces of the cutting position of the drum 2 are used as the cutting tool. A rolling cutter may be used only on the inner peripheral surface of the cutting position of the drum 2.

Explanatory sectional drawing which shows the structure of the cutting device of the metal thin plate drum of this invention. II-II sectional view taken on the line of FIG. Explanatory drawing which shows the contact state of the blade tool with respect to the metal thin plate drum in the apparatus of FIG. Explanatory drawing which shows the shape of a blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cutting device, 2 ... Drum, 3 ... Drum holding | maintenance part (drum holding means), 4a, 4b ... Rolling cutter (cutting tool), 6 ... Metal ring, 25 ... Rotating shaft, 26 ... Arm member, 27 ... Electromagnet.

Claims (1)

The drum formed in a cylindrical shape is held by a thin metal plate and is rotatably provided. The drum holding means is held against the inner and outer peripheral surfaces of the cutting position of the drum held by the drum holding member. A cutting device for a thin metal plate drum, comprising a pair of rotatable cutting tools which are in contact with each other and cut the drum, and cut the drum in a circumferential direction at a predetermined width to form an endless belt-shaped metal ring. And
Disposed below the outer peripheral surface of the end portion on the cutting position side of the drum, which is held by the drum holding means, is provided with a discharge means comprising an electromagnet that allows current to be intermittently connected and a transfer member that transfers the electromagnet to a discharge position;
After the cutting of the drum is completed, a metal ring formed by cutting the drum is magnetized and held on the electromagnet that has been energized in advance, and the electromagnet holding the metal ring is transferred to the discharge position by the transfer member. And a metal thin plate drum cutting device which discharges the metal ring to the discharge position by cutting off the energization of the electromagnet.

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