WO2023276573A1

WO2023276573A1 - Wire cutting device and wire machining system

Info

Publication number: WO2023276573A1
Application number: PCT/JP2022/022881
Authority: WO
Inventors: 赴仁山口; 勇妙圓薗
Original assignee: 株式会社アマダ; 株式会社アマダプレスシステム
Priority date: 2021-06-29
Filing date: 2022-06-07
Publication date: 2023-01-05
Also published as: TW202301767A; TWI808818B; CN117580665A; JPWO2023276573A1

Abstract

A wire cutting device (93) comprises a cutting body (934) that includes a turntable (2) rotating about a center line (CL1), and a rotating ring (3) rotating about the center line (CL1), and having a ring part (3a) on the outer side in a radial direction of the turntable (2), and that moves parallel to the center line (CL1). The turntable (2) includes: a cutting tip (56); a slider (54) to which the cutting tip (56) is attached, and which moves in the radial direction so that the cutting tip (56) moves between a first position spaced apart from a wire (WR) on the center line (CL1) and a second position for cutting into the wire (WR); and a direction changing part (E) for moving the cutting tip (56) toward the second position by a distance (Lb) corresponding to a phase angle (θa) of the ring part (3a) from an initial phase position that is a position in a rotating direction of the ring part (3b) with respect to the turntable (2) in the first position.

Description

Wire rod cutting equipment and wire rod processing system

The present disclosure relates to a wire rod cutting device and a wire rod processing system.

Patent Literature 1 describes a coating peeling device that cuts a coated portion of a coated cable in the thickness direction with a plurality of rotating blades and moves the cut coating in the longitudinal direction of the coated cable to expose the core material. .

Japanese Patent No. 5699121

The coating stripping device described in Patent Document 1 can strip the coating, but cannot reduce the diameter of the metal wire rod by cutting. In addition, in the structure of the coating stripping device described in Patent Document 1, even if cutting to reduce the diameter of the wire is possible, it is only for the end of the wire, and the diameter of the intermediate portion excluding the end is reduced. It cannot be made smaller. Therefore, there is a demand for a wire rod cutting device that can reduce the diameter of the intermediate portion of a metal wire by cutting, and a wire rod processing system that includes a wire rod cutting device and a wire rod processing device for processing the wire rod cut by the wire rod cutting device into a product. there is

A first aspect of one or more embodiments includes a rotating disk that rotates about a centerline and a ring-shaped ring portion that rotates about the centerline and is radially outward of the rotating disk. a cutting body portion that includes a rotating ring and moves in a direction parallel to the center line, the rotating disc having cutting tips; a slider radially moving to move between a first position spaced apart from the wire and a second position to cut into the wire; and a direction changer for moving the slider so as to move toward the second position at a distance according to the phase angle of the ring from an initial phase position, which is a position in the rotational direction. .

According to the first aspect, according to the position of the rotating ring in the circumferential direction with respect to the rotating disk, the cutting tip is cut into an intermediate position of the wire and rotated to move the cutting body in parallel with the direction in which the wire extends. can be done. Thereby, according to the 1st aspect, the diameter of the intermediate part of a wire can be made small by cutting.

A second aspect of one or more embodiments includes an uncoiler for uncoiling the wire from a coil of wire, a first wire gripper and a second wire gripper for positioning the wire uncoiled from the uncoiler for linear travel. A wire rod gripping device, a wire rod processing device for processing the wire from the second wire rod gripping device, and a wire rod cutting device disposed between the first wire rod gripping device and the second wire rod gripping device, The wire rod cutting device is the wire rod cutting device described above, and the first wire rod gripping device and the second wire rod gripping device provide a wire rod processing system that positions the wire rod on the center line of the wire rod cutting device.

According to a second aspect, the wire processing system comprises a wire cutting device arranged in-line between the uncoiler and the wire processing device, the wire cutting device cutting the uncoiler according to the circumferential position of the rotating ring with respect to the rotating disk. The cutting tip can be cut into an intermediate position of the wire rod drawn out from the cutting edge and rotated to move the cutting main body in parallel with the direction in which the wire rod extends. Thus, according to the second aspect, the diameter of the intermediate portion of the wire can be reduced by cutting.

According to one or more embodiments, the diameter of the middle portion of the metal wire can be reduced by cutting.

FIG. 1 is a diagram showing the overall configuration of a wire processing system ST, which is a wire processing system according to one or more embodiments. FIG. 2 is a cross-sectional view taken along line S2-S2 in FIG. 1, showing the internal structure of the wire rod cutting device 93 provided in the wire rod processing system ST. FIG. 3 is a partial cross-sectional view at S3-S3 position in FIG. FIG. 4 is a view of the wire rod cutting device 93 viewed from the upstream side. 5A and 5B are diagrams showing the chip feeding operation of the chip feeding section 5 of the wire rod cutting device 93. FIG. FIG. 6 is a graph showing an example of the relationship between the rotation speed of each of the rotating disk 2, the cutting rotary ring 3, and the feed motor 932 and time in the wire rod cutting process by the wire rod cutting device 93. FIG. FIG. 7 is a diagram showing a state in which a cut portion AR is formed in the intermediate portion of the wire rod WR by the wire rod cutting device 93. As shown in FIG. FIG. 8 is a graph showing Modification 1 of the relationship shown in FIG. FIG. 9 is a graph showing Modification 2 of the relationship shown in FIG. FIG. 10 is a graph showing variation 3 of the relationship shown in FIG.

A wire cutting device and wire processing system according to one or more embodiments will be described by wire cutting device 93 and wire processing system ST. FIG. 1 is a diagram showing the overall configuration of a wire processing system ST, which is a wire processing system according to one or more embodiments. Let each direction of up-down and upstream-downstream be the direction shown by the arrow in FIG. Upstream and downstream correspond to the running direction (line feeding direction) of the wire rod WR, with the left side of FIG. 1 being the downstream direction and the right side being the upstream direction.

The wire processing system ST includes a wire feeding device 912 including an uncoiler 91 and a first wire gripping device 92, a wire cutting device 93, a second wire gripping device 94, and a wire processing device 95. That is, the wire rod cutting device 93 is arranged inline between the wire feeding device 912 and the wire rod processing device 95 .

A coil WRa of a metal wire rod WR is attached to the uncoiler 91 . The wire rod WR is delivered from the coil WRa attached to the uncoiler 91 toward the first wire rod gripping device 92 . The first wire rod gripping device 92 determines the traveling position of the wire rod WR fed out from the uncoiler 91 and stably feeds the wire rod WR.

The wire rod cutting device 93 performs cutting to reduce the outer diameter of the wire rod WR supplied from the first wire rod gripping device 92 side. A second wire rod gripping device 94 is arranged downstream of the wire rod cutting device 93 in the wire feeding direction. The second wire rod gripping device 94 matches the traveling position of the wire rod WR fed from the wire rod cutting device 93 with that of the first wire rod gripping device 92 and stably maintains the wire rod WR, and feeds the wire rod WR to the downstream side. The running position of the wire rod WR is a position centered on the center line CL1, which is the first center line in FIG. Since the traveling position of the wire rod WR is stably determined between the first wire rod gripping device 92 and the second wire rod gripping device 94, the wire rod cutting device 93 performs cutting with high accuracy.

The wire processing device 95 performs machining such as cutting and bending the wire WR delivered from the second wire gripping device 94, processes it into a desired shape, and discharges it as a product Pd.

As shown in FIG. 1, the wire rod cutting device 93 has a guide rail 931, a feed motor 932 (third motor), a feed slider 933, and a cutting main body 934. The guide rail 931 is laid on the floor FL. The feed slider 933 engages with the guide rail 931 and moves within a predetermined range along the guide rail 931 according to the rotation of the ball screw (not shown) (see arrow DR). The ball screw is rotated by feed motor 932 . The operation of the feed motor 932 is controlled by, for example, a controller CT housed in the cutting main body 934 . The control part CT does not have to be housed in the cutting main body part 934, and its location is not limited.

The wire rod cutting device 93 will be described in detail with reference to FIGS. FIG. 2 is a cross-sectional view taken along line S2-S2 in FIG. 1, showing the internal structure of the wire rod cutting device 93 provided in the wire rod processing system ST. FIG. 3 is a partial cross-sectional view at S3-S3 position in FIG. FIG. 4 is a view of the wire rod cutting device 93 viewed from the supply side (upstream side) of the wire rod WR. In addition to the vertical, upstream, and downstream directions already described, the horizontal direction is defined by the arrows shown in FIG. The left and right sides of the arrow correspond to left and right when viewed from the upstream side.

FIG. 2 shows a wire rod cutting device 93 having a cutting main body 934 that moves in a direction parallel to the center line CL1. The wire rod cutting device 93 includes a rotating disk 2 that rotates about the center line CL1, and a cutting rotary ring 3 that rotates about the center line CL1 and has a ring portion 3a on the radially outer side of the rotating disk 2. including.

　The turntable 2 includes a cutting tip 56, a slider 54, and a direction changing part E. The slider 54 moves in the radial direction so as to move between a first position in which the cutting tip 56 is attached and the cutting tip 56 is arranged on the center line CL1 of the wire rod WR, and a second position in which the cutting tip 56 is cut. . The direction changing portion E moves the cutting tip 56 to the second position at a distance Lb corresponding to the phase angle θa of the ring portion 3a from the initial phase position, which is the position in the rotational direction of the ring portion 3a with respect to the rotating disk 2 at the first position. Slider 54 is moved so as to move toward.

FIG. 1 also shows a wire rod processing system ST including the wire rod cutting device 93 shown in FIG. In FIG. 2, the movement of the slider 54 by the distance Lb is shown as the movement by the distance Lb of the cam follower 53 that moves integrally with the slider 54, and the position of the cam follower 53 after the movement by the distance Lb is shown by a chain double-dashed line.

That is, the wire rod processing system ST includes an uncoiler 91 , a first wire rod gripping device 92 and a second wire rod gripping device 94 , a wire rod processing device 95 , and a wire rod cutting device 93 . The uncoiler 91 pulls out the wire WR from the coil WRa of the wire WR. The first wire rod gripping device 92 and the second wire rod gripping device 94 position the wire rod WR pulled out from the uncoiler 91 so as to travel linearly. The wire processing device 95 processes the wire WR from the second wire gripping device 94 . The wire rod cutting device 93 is arranged between the first wire rod gripping device 92 and the second wire rod gripping device 94 . The first wire rod gripping device 92 and the second wire rod gripping device 94 position the wire rod WR on the center line CL<b>1 of the wire rod cutting device 93 .

As shown in FIG. 2 or FIG. 3, the wire rod cutting device 93 includes a case 1, a rotating disk 2, a cutting rotating ring 3, a holder plate 4, three chip feeders 5 (5A, 5B, 5C), a base sleeve 6, It comprises a first gear disc 7 and three bearings (a first bearing 8, a second bearing 9 and a third bearing 10).

Case 1 is a roughly rectangular parallelepiped exterior case. As shown in FIG. 3, the holder plate 4 has a circular hole 4a centered on the center line CL1, and is fixed inside the case 1 in a posture orthogonal to the center line CL1.

The incision rotary ring 3 is a generally ring-shaped member, and is rotatably arranged with a third bearing 10, which is a cross roller bearing, interposed between the rotary ring 3 and the circular hole 4a of the holder plate 4. The incision rotary ring 3 has three cam pushers 51 attached at angular intervals of 120° to the ring portion 3a, which is the peripheral portion of the downstream side. The cam pusher 51 has a cylindrical push portion 51a at the tip protruding downstream from the incision rotary ring 3 . A spur gear-shaped second tooth portion 31 is formed on the upstream peripheral edge portion of the cutting rotary ring 3 .

Outer rings of a first bearing 8 and a second bearing 9 are fixed to the inner peripheral surface of the notched rotary ring 3 on the upstream side and the downstream side, respectively. The first bearing 8 and the second bearing 9 are radial ball bearings, and the first bearing 8 is self-aligning type.

The inner rings of the first bearing 8 and the second bearing 9 are fixed to the outer peripheral surface of the base sleeve 6. The base sleeve 6 is a tubular metal member having a through hole 6a. The inner diameter of the through hole 6a is larger than the maximum diameter of the wire rod WR that can be cut according to the specifications of the wire rod cutting device 93 . A first gear disc 7 is attached to the upstream end of the base sleeve 6 . The base sleeve 6 and the first gear disc 7 are integrated by a connector 11 such as a dowel pin so as to rotate synchronously. A rotary disk 2 is attached to the downstream end of the base sleeve 6 . The base sleeve 6 and the rotating disk 2 are integrated by a connecting tool 12 such as a dowel pin so as to rotate synchronously.

As shown in FIG. 2, the outer peripheral portion of the incision rotating ring 3 is visually recognized as a ring-shaped ring portion 3a on the radially outer side of the rotating disk 2. As shown in FIG.

A spur gear-shaped first tooth portion 71 is formed on the outer peripheral portion of the first gear disc 7 . The addendum circle of the first toothing 71 of the first gear wheel 7 is smaller than the addendum circle of the second toothing 31 of the cutting rotary ring 3 on the downstream side.

On the downstream side surfaces of the incision rotary ring 3 and the rotary disk 2, three

chip feeders

5A, 5B, and 5C are arranged at a pitch of 120° around the center line CL1. The three

chip feeders

5A, 5B and 5C have the same configuration.

The tip feeder 5 (5A, 5B, 5C) includes a cam pusher 51, a cam lever 52, a slide base 55, a cam follower 53, a slider 54, a cutting tip 56, a tension coil spring 57, a first hook pin 21, and a second hook pin 542. consists of The cam pusher 51 having a push portion 51 a is directly attached to the rotary cutting ring 3 . The cam lever 52 , slide base 55 and first hook pin 21 are directly attached to the rotating disc 2 .

The cam lever 52 is rotatable around a rotation axis CL52 extending in the feed line direction. As shown in FIG. 2, the cam lever 52 includes a first arm portion 52a extending radially outward from the position of the rotation axis CL52, and extending in the counterclockwise circumferential direction in FIG. 2 from the position of the rotation axis CL52. It has a second arm portion 52b and is formed in an inverted L shape.

The incision rotary ring 3 is rotated circumferentially with respect to the rotary disc 2 so that the first arm portion 52 a of the cam lever 52 extends diametrically of the rotary disc 2 and contacts the counterclockwise end of the cam pusher 51 . is positioned at

The slide base 55 has a guide hole 551 (see FIG. 2) extending parallel to the diameter of the rotary disc 2 and is fixed to the rotary disc 2 . The slider 54 is held in engagement with the guide hole 551 so as to be movable along the guide hole 551 (see arrow DR3). The slider 54 is a member elongated in the radial direction, and has a cam follower 53, a second hook pin 542, and a cutting tip 56 attached thereto.

The cam follower 53 is attached to the radial outer edge of the slider 54 so as to protrude downstream in a cylindrical shape. The second hook pin 542 is attached so as to protrude from the right side surface of the slider 54 . Between the first hook pin 21 erected on the rotating disk 2 and the second hook pin 542, a tension coil spring 57 is stretched in a substantially radial direction in a state in which tension is applied to extend beyond its natural length. The slider 54 is urged toward the cam lever 52 by the tension (compressive force) of the extended tension coil spring 57, and the cam follower 53 is always urged toward the surface of the second arm portion 52b of the cam lever 52 on the center line CL1 side. are abutted.

The position where the cam follower 53 contacts the second arm portion 52b is one side (in this example, the right side (the left side in FIG. 2)) with respect to the radius connecting the rotation axis CL52 and the center line CL1.

The cutting tip 56 is attached to the end of the slider 54 on the side of the center line CL1, and has a blade 56a at its tip for cutting the wire rod WR. FIG. 2 shows a state in which the first arm portion 52a of the cam lever 52 is in a diametrically extended position and the cam follower 53 is in contact with the second arm portion 52b. At this time, the blade 56a of the cutting tip 56 is at the first position separated by a predetermined distance from the outer peripheral surface of the wire rod WR positioned with the center line CL1 as the central axis. A state in which the cutting tip 56 is at the first position separated from the wire rod WR is defined as a standby state of the tip feeding unit 5 . The predetermined distance is, for example, approximately 0.5 mm for the wire rod WR having a diameter of 3.0 mm.

As shown in FIG. 4, the output gear 721 of the chip rotating motor 72 (first motor) meshes with the first toothed portion 71 of the first gear disc 7 . As a result, the first gear disc 7 is driven by the tip rotation motor 72 to rotate. The output gear 321 of the cutting rotation motor 32 (second motor) meshes with the second tooth portion 31 of the cutting rotation ring 3 . As a result, the cutting rotary ring 3 is driven by the cutting rotary motor 32 to rotate. The rotation direction of the first gear disc 7 and the cutting rotary ring 3 is clockwise (arrow DR1) in FIG.

As shown in FIG. 3, the incision rotary ring 3 is rotatable with respect to the holder plate 4 via a third bearing 10, and is rotatable with respect to the base sleeve 6 via a first bearing 8 and a second bearing 9. be. As a result, the incision rotary ring 3 rotates at a rotational speed V3 (see FIG. 6) corresponding to the rotational speed of the incision rotary motor 32 .

The rotating disk 2 rotates integrally with the base sleeve 6 by means of the connecting tool 12, and the base sleeve 6 rotates integrally with the first gear disk 7 by means of the connecting tool 11. Therefore, the rotating disk 2 rotates integrally with the first gear disk 7 and rotates at a rotational speed V2 (see FIG. 6) corresponding to the rotational speed of the chip rotating motor 72 . In addition, since the first bearing 8 and the second bearing 9 are interposed between the rotating disk 2 and the rotating ring 3, the rotating disk 2 and the rotating ring 3 can rotate independently at different rotation speeds. .

As shown in FIG. 2, the phase position of the rotation direction of the cutting rotary ring 3 with respect to the rotary table 2 when the chip feeding unit 5 is in the standby state is the same rotation as the rotation angular velocity of the cutting rotary ring 3 with 360° rotation as one cycle. Let the relative phase position of the angular velocity with respect to the rotating disk 2 be the initial phase position, and let the phase angle be the phase angle θa. That is, the state in which the incision rotary ring 3 rotates with a delay of the phase angle θa with respect to the rotary disk 2 is the standby state, which is the initial phase position. Further, when the phase difference of the rotation angle changes due to the angular velocity difference between the rotation angular velocity of the incision rotary ring 3 and the rotation angular velocity of the rotary disk 2 having a different rotation angular velocity, the phase angle θa changes from the initial state.

The phase angle θa takes a positive value when the incision rotary ring 3 rotates counterclockwise (arrow DR2) in FIG. 2, and a negative value when it rotates clockwise.

The wire rod cutting device 93 is attached to the slider 54 and the slider 54 by changing the phase of the cutting rotary ring 3 with respect to the rotary table 2 from the standby state of the chip feeding unit 5 shown in FIG. The cutting tip 56 can be moved in a direction approaching the center line CL1. That is, the wire rod cutting device 93 has a direction converting portion E that converts the rotational movement of the cutting rotary ring 3 into the radial movement of the slider 54 . The direction changing portion E includes a cam pusher 51 and a cam lever 52 . The operation of converting the rotational movement of the incision rotary ring 3 into the radial movement of the slider 54 will be described with reference to FIG.

FIG. 5 is a diagram showing the chip feeding operation by the chip feeding section 5 of the wire rod cutting device 93. FIG. Specifically, FIG. 5 shows a state in which the incision rotary ring 3 is shifted counterclockwise (positive direction) in the direction of the arrow DR4 with respect to the rotary disc 2 by the phase angle θa. That is, FIG. 5 shows a state in which the phase is shifted in the positive direction by the phase angle θa from the phase angle θa in the initial state, and the phase difference is zero. In this way, the cutting rotary ring 3 is shifted in the positive direction from the standby state of the chip feeder 5 with respect to the rotary table 2 by the phase angle θa, and the cutting chips 56 are moved to the second position where they cut into the wire rod WR. The state is called the cut state.

In the wire rod cutting device 93 shown in FIG. 5, the direction changing portion E includes a cam pusher 51 attached to the ring portion 3a and a turntable 2, which abuts on the cam pusher 51 and rotates according to the phase angle θa of the ring portion 3a. It has a cam lever 52 that pushes the slider 54 toward the center line CL1 and moves it by a distance Lb according to the rotation angle by rotating at the rotation angle.

In FIG. 5, when the cutting rotary ring 3 rotates counterclockwise from the standby position (see arrow DR4), the cam pusher 51 pushes the first arm 52a of the cam lever 52 leftward in FIG. As a result, the cam lever 52 rotates counterclockwise around the rotation center CL51 (see arrow DR5). When the cam lever 52 rotates counterclockwise, the second arm portion 52b pushes the cam follower 53 toward the center line CL1 (see arrow DR6).

The slider 54 to which the cam follower 53 is attached can move in the radial direction of the rotating disk 2 with respect to the slide base 55 . Further, the force transmitted from the cutting rotation motor 32 to rotate the cutting rotation ring 3 counterclockwise with respect to the rotating disk 2 is set to exceed the tension (compression force) of the tension coil spring 57 . Therefore, the slider 54 moves against the tension coil spring 57 so as to further extend it, and the cutting tip 56 moves to a position where it cuts into the wire rod WR. In FIG. 5, the cam follower 53 in a standby state before movement is indicated by a chain double-dashed line.

When the cutting rotary ring 3 shifts the phase clockwise (negative direction) by the phase angle θa from the cutting state position shown in FIG. It is pushed radially outward by the cam follower 53 which receives the compressive force of the spring 57 . Therefore, the cam lever 52 rotates clockwise around the rotation axis CL52 so as to follow the cam pusher 51 by the cam follower 53, and enters the standby state again.

Next, the relationship between the rotation speed of the rotating disk 2 and the cutting rotating ring 3 and the time in the cutting of the wire rod WR by the wire rod cutting device 93 will be described. Assuming that the number of revolutions per unit time of the rotary disc 2 is V2, and the number of revolutions per unit time of the incision rotary ring 3 is V3, the rotation rate of the rotary disc 2 varies depending on the magnitude of the rotation speed V3 relative to the rotation speed V2. determines the direction of relative rotation of the incision rotary ring 3 with respect to.

Specifically, the rotation direction is counterclockwise in FIGS. 2 and 5 (the direction of the arrow DR4 in FIG. 5), the rotation speed is V2=the rotation speed is V3, and the rotating disk 2 and the cutting rotating ring 3 do not rotate relative to each other. rotate synchronously. Rotational speed V2<rotational speed V3, the incision rotary ring 3 rotates counterclockwise in FIGS. On the rotating side and V2>rotating speed V3, the incising rotary ring 3 rotates clockwise in FIGS.

For this reason, the control unit CT first sets the cutting rotary ring 3 to the initial phase position so that the chip feeding unit 5 is in the standby state, and then moves the rotating disk 2 and the cutting rotary ring 3 to the same state, for example, in the state shown in FIG. Rotate at rotational speed. After that, the rotation speed V3 of the incision rotary ring 3 is made faster than the rotation speed V2 of the rotary disk 2. - 特許庁As a result, the cutting rotary ring 3 is shifted counterclockwise in FIG. , the amount of cut corresponding to the amount of relative movement of the rotary ring 3 in the circumferential direction is given.

The controller CT also drives the feed motor 932 to move the cutting main body 934 within a predetermined range in the feeding direction of the wire rod WR. As a result, a desired cutting range in the intermediate portion of the wire rod WR can be cut with a predetermined depth of cut to form a small-diameter cut portion AR (see FIG. 7).

FIG. 6 is a graph showing an example of the relationship between the rotation speed of each of the rotating disk 2, the cutting rotating ring 3, and the feed motor 932 and time in the cutting of the wire rod cutting device 93. More specifically, in FIG. 6, the rotation speed V2 of the rotating disk 2 is indicated by a solid line, the rotation speed V3 of the incision rotary ring 3 is indicated by a broken line, and the rotation speed V932 of the feed motor 932 is indicated by a dashed line. In the following description, velocities Va, Vb, Vc, and Vd mean rotational velocities (rotations/second). The initial position of the cutting body 934 along the wire rod WR is the initial position P1 at the upstream end of the movement range shown in FIG.

The wire rod cutting device 93 includes a tip rotation motor 72 that rotates the turntable 2, a cutting rotation motor 32 that rotates the rotary ring 3, and a controller CT that controls the operations of the tip rotation motor 72 and the cutting rotation motor 32. . The control part CT changes the phase angle θa of the ring part 3a by providing a period tp during which the rotation speed V3 of the rotating ring is higher than the rotation speed V2 of the rotating disk 2 . The tip rotation motor 72, the cutting rotation motor 32, and the controller CT are shown in FIG. 4, and the rotational speed V2, the rotational speed V3, and the period tp are shown in FIG.

(1) Time t0 to time t1: The control unit CT operates the tip rotation motor 72 and the cutting rotation motor 32 to equalize the rotation speed V2 and the rotation speed V3 from 0 (zero) to the speed at a constant angular acceleration. Increase to Va. As a result, the rotating disk 2 and the cutting rotating ring 3 rotate at the speed Va synchronously at the time t1.

(2) Time t1 to time t2: The control unit CT sets the rotational speed V2 to a constant speed Va at time t1, and the rotational speed V3 continues to increase after time t1 and reaches a speed Vb at time t2. The angular acceleration that increases the rotation speed V3 during this period is not limited, and is assumed to be the same as the angular acceleration from time t0 to time t1, for example. As a result, the rotating disk 2 rotates at a constant speed, and the cutting rotating ring 3 is out of phase with respect to the rotating disk 2 in the counterclockwise direction in FIG.

(3) Time t2 to time t3
The controller CT keeps the speed Va of the turntable 2 constant, and decreases the rotation speed V3 from the speed Vb to the speed Va. The angular acceleration that reduces the rotation speed V3 is not limited, and is, for example, a negative value of the angular acceleration (absolute value) from time t1 to time t2. A period from time t1 to time t3 in which the rotation speed V3 of the rotating ring 3 is higher than the rotation speed V2 of the rotating disk 2 is defined as a period tp.

As a result, the incision rotary ring 3 is maintained at a circumferential position with a predetermined phase angle θa (see FIG. 2) with respect to the rotary disc 2 . Along with this, the cutting tip 56 is provided with a cutting amount corresponding to the phase angle, and cuts into the wire WR while rotating on the peripheral surface of the wire WR. In this way, the control part CT generates the phase angle θa of the ring part 3a by providing a period tp during which the rotational speed V3 of the rotary ring 3 is made higher than the rotational speed V2 of the rotary disk 2 .

(4) Time t3 to time t4
The cutting tip 56 cuts a predetermined amount of the wire rod WR at its initial position. A short period of time t3 to time t4 is sufficient, and the period of time t3=time t4 may be 0 (zero).

(5) Time t4 to time t5 to time t6
The controller CT operates the feed motor 932, increases the rotation speed V932 of the feed motor 932 from 0 (zero) to the speed Vc at time t5, and then reduces it to 0 (zero) again at time t6. The angular acceleration that increases and decreases the rotation speed V932 and its change over time are not limited, and are, for example, constant angular acceleration.

The time change of the rotational speed V932 is indicated by an upwardly convex triangular shape in FIG. The rotational speed V932 of the feed motor 932 and the moving speed of the cutting body 934 accompanying the rotation of the feed motor 932 have a linear relationship. Therefore, the cutting main body 934 moves in the extending direction of the wire rod WR by a distance L6 (see FIG. 1) corresponding to the triangular area A6 during the period from time t4 to time t6. The position after the wire rod cutting device 93 has moved by the distance L6 is defined as the post-movement position P2. As a result, the wire rod WR is cut by the wire rod cutting device 93 with a predetermined depth of cut in the range of the distance L6, thereby reducing the diameter.

The wire rod cutting device 93 includes a feed motor 932 that moves a cutting main body 934 in a direction parallel to the center line CL1 under the control of the controller CT. When the cutting tip 56 is at the second position, the controller CT operates the feed motor 932 to move the cutting main body 934 in a direction parallel to the center line CL1. The feed motor 932 shown in FIG. 1 is driven under the control of the controller CT after the period tp to move the cutting body 934 parallel to the center line CL1, as shown in FIG.

FIG. 7 is a diagram showing a state in which the wire rod cutting device 93 cuts the intermediate portion of the wire rod WR to have a small diameter. This cut portion is called a cut portion AR. For example, the wire rod WR has a wire diameter Da of 3.0 mm. A cut portion AR, which is a small-diameter portion having a wire diameter Db of 2.0 mm, is formed in the range La. In FIG. 7, the cutting tip 56 moves from the initial position P1 to the post-movement position P2 while cutting the wire rod WR.

The cutting main body 934 moves upstream in FIG. 1 when the rotation speed V932 shown in FIG. 6 has a positive value, and moves downstream when it has a negative value.

(6) Time t6 to time t7
After time t6, the wire rod WR is cut by a predetermined amount with the cutting tip 56 at the post-movement position P2. A short period of time t6 to time t7 in FIG. 6 is sufficient, and the period of time t6=time t7 may be 0 (zero).

(7) Time t7 to time t8 to time t9
The control unit CT reduces the rotation speed V2 of the rotating disk 2 and the rotation speed V3 of the incision rotating ring 3 to 0 (zero) at time t8 and time t9, respectively. The decreasing angular acceleration is not limited. However, the time t9 at which the rotation speed V3 becomes 0 (zero) is set later than the time t8 so that the incision rotary ring 3 whose phase is changed between the time t1 and the time t3 is returned to the initial phase position. As a result, the chip feeder 5 moves radially outward, and the cutting chip 56 is separated from the wire rod WR.

(8) Time t9 to time t10 to time t11
After stopping the rotation of the turntable 2 at time t8 and stopping the rotation of the incision rotary ring 3 at time t9, the control unit CT causes the feed motor 932 to perform the operations from time t4 to time t6 in reverse rotation. The cutting main body 934 is returned from the post-movement position P2 to the initial position P1.

With the above, the cutting operation for forming the cut portion AR cut to a small diameter in the intermediate portion of the wire rod WR is completed.

As described above, according to the wire rod cutting device 93, the wire rod WR is cut at the intermediate portion excluding the end portion of the wire rod WR with an arbitrary depth of cut within an arbitrary length range to form a cut portion AR with a reduced diameter. can.
The wire rod cutting device 93 has a rotating disk 2, a cutting rotating ring 3, and a chip feeder 5 including a direction changing portion E and capable of cutting the cutting chip 56 into the wire rod WR. As a result, the control unit CT sets a period in which the rotation speed V3 of the cutting rotary ring 3 is higher than the rotation speed V2 of the rotary disk 2, so that the wire rod WR of the three cutting tips 56 is cut by a cutting amount corresponding to the period. can be cut with high accuracy. Therefore, the wire rod cutting device 93 has a simple structure, can easily control the depth of cut, and can finish cutting well.

Also, the wire rod cutting device 93 can be installed inline between the uncoiler 91 and the wire rod processing device 95 . As a result, products with different wire diameters in the intermediate portion can be produced on the same line, so production of a wide variety of products in small quantities is possible, improving production efficiency.

The present invention is not limited to the configuration described above, and can be modified without departing from the gist of the present invention. For example, even if the rotation speed V3 of the incision rotary ring 3 is lower than the rotation speed V2 of the rotary disk 2, the shifted phase can be reduced. The control unit CT is not limited to providing the period tp during which the rotation speed V3 of the rotary cutting ring 3 is higher than the rotation speed V2 of the rotary disk 2, and the rotation speed of the rotary cutting ring 3 is higher than the rotation speed V2 of the rotary disk 2. A period during which the speed V3 is reduced may be provided. Thus, by making the rotational speed V2 of the rotating disk 2 and the rotating speed V3 of the rotating incision ring 3 different, it is possible to adjust the phase of the rotating incising ring 3 with respect to the rotating disk 2 .

(Modification 1)
FIG. 8 is a graph showing a modified example 1 of the relationship between the rotational speed and time of the embodiment shown in FIG. Modification 1 has the same temporal changes in rotational speed V2 and rotational speed V3 as in the embodiment shown in FIG. , is an example of reciprocating movement instead of the one-way movement described above.

Time t11 to t13 and time t27 to t29 in FIG. 8 respectively correspond to time t1 to t3 and time t7 to t9 in FIG. 6 of the embodiment. Further, the rotational speeds Va1, Vb1, Vc1 and Vd1 correspond to the rotational speeds Va, Vb, Vc and Vd in FIG. 6 of the embodiment, respectively.

The controller CT drives the feed motor 932 to move the position of the cutting tip 56 of the cutting main body 934 from the initial position P1 to the post-movement position P2 during the period from time t14 to t17, and from time t17 to t20. It is returned from the post-movement position P2 to the initial position P1. Further, the controller CT moves the cutting body 934 from the initial position P1 to the post-movement position P2 during the period from time t20 to t23, and moves the position of the cutting tip 56 during the period from time t23 to t26. It is returned from the post-movement position P2 to the initial position P1. That is, the controller CT causes the cutting main body 934 to reciprocate twice at a predetermined distance while cutting the wire rod WR.

This reciprocating motion improves the finish of the cutting part AR. Further, when the depth of cut by the cutting tip 56 is large, the cutting depth is divided and reciprocated, so the cutting load is reduced and the life of the cutting tip 56 can be extended.

(Modification 2)
FIG. 9 is a graph showing a modified example 2 of the relationship between the rotational speed and time of the embodiment shown in FIG. Modification 2 is obtained by changing the rising characteristics of the rotating disk 2 and the cutting rotating ring 3 . At the beginning of the rotation speed increase, the control unit CT raises the positive phase angle θa of the ring portion 3a of the rotating ring 3 with respect to the rotating disk 2 from the rotation stop state to a predetermined rotation speed Va2, which corresponds to the depth of cut. obtained by differentiating from Specifically, the control unit CT increases the rotation speed V2 of the rotating disk 2 from the rotation speed 0 (zero) with an angular acceleration that reaches the rotation speed Va2 at time t32, while the rotation speed of the incision rotating ring 3 V3 increases with angular acceleration from the number of rotations (zero) to reach the rotation speed Va2 at time t31 before time t32.

In the method of Modification 2, the cutting main body 934 starts cutting into the wire rod WR before the rotation speed V3 reaches the predetermined rotation speed Va2. Therefore, when the wire rod WR is a free-cutting material, the cutting time can be shortened while reducing the load on the cutting tip 56 .

(Modification 3)
FIG. 10 is a graph showing a modified example 3 of the relationship between the rotational speed and time of the embodiment shown in FIG. Modification 3 is similar to Modification 2 in that the rising characteristics of the rotating disk 2 and the incision rotating ring 3 are changed. The control part CT varies the angular acceleration for raising the positive phase angle θa of the ring portion 3a of the incision rotary ring 3 from the rotation stop state to a predetermined rotational speed Va2 from the middle of the rotation speed increase, which corresponds to the incision amount. I get it by Specifically, the control unit CT increases the rotation speed V2 and the rotation speed V3 at the same angular acceleration from the rotation speed 0 (zero) to the time t41, and changes the angular acceleration from the time t41 to increase the rotation speed V2 to the time At t43, the rotational speed Va3 is set to a predetermined value, and the rotational speed V3 reaches the predetermined rotational speed Va3 at time t42, which is earlier than time t43.

In the method of Modified Example 3, cutting into the wire WR is not performed when the rotational speed V3 is relatively low, and cutting into the wire WR starts after the rotational speed V3 rises to some extent. Therefore, when the wire rod WR is not a free-cutting material, cutting at a low speed can be avoided, and the cutting time can be shortened while suppressing the load on the cutting tip 56 .

The embodiment and modification 3 can be combined, and the embodiment and modification 4 can be combined. Modification 1 and Modification 3 can be combined, and Modification 1 and Modification 4 can be combined.

This application claims priority based on Japanese Patent Application No. 2021-107412 filed with the Japan Patent Office on June 29, 2021, the entire disclosure of which is incorporated herein by reference.

Claims

and a rotating ring that rotates about the center line and has a ring-shaped ring portion on the radially outer side of the rotating disc, and rotates in a direction parallel to the center line. Equipped with a moving cutting body,
The rotating disk is
a cutting tip;
a slider on which said cutting tip is mounted and which moves radially so that said cutting tip moves between a first position spaced relative to a wire disposed on said centerline and a second position for cutting into said wire; ,
so that the cutting tip moves toward the second position at a distance corresponding to the phase angle of the ring from an initial phase position, which is the position in the rotational direction of the ring with respect to the rotating disk at the first position. , a direction changer for moving the slider;
wire rod cutting equipment including;
The direction changing unit is
a cam pusher attached to the ring portion;
It is attached to the rotating disk, abuts on the cam pusher, and rotates at a rotation angle corresponding to the phase angle of the ring portion, thereby pushing the slider toward the center line and moving a distance corresponding to the rotation angle. a cam lever to move,
The wire rod cutting device according to claim 1, comprising:
a first motor that rotates the turntable;
a second motor for rotating the rotating ring;
a control unit that controls operations of the first motor and the second motor;
with
The wire rod cutting apparatus according to claim 1, wherein the control section generates the phase angle of the ring section by providing a period in which the rotational speed of the rotating disk and the rotational speed of the rotating ring are different.
a first motor that rotates the turntable;
a second motor for rotating the rotating ring;
a control unit that controls operations of the first motor and the second motor;
with
The wire rod cutting apparatus according to claim 2, wherein the control section generates the phase angle of the ring section by setting a period in which the rotation speed of the rotating disk and the rotation speed of the rotating ring are different.
A third motor for moving the cutting main body in a direction parallel to the center line under the control of the control unit,
The wire rod cutting device according to claim 3, wherein the control unit operates the third motor to move the cutting main body in a direction parallel to the center line when the cutting tip is at the second position.
an uncoiler for pulling out the wire from a coil of wire;
a first wire rod gripping device and a second wire rod gripping device that position the wire pulled out from the uncoiler so that it travels linearly;
a wire rod processing device for processing the wire rod from the second wire rod gripping device;
a wire rod cutting device disposed between the first wire rod gripping device and the second wire rod gripping device;
with
The wire rod cutting device is the wire rod cutting device according to any one of claims 1 to 5,
The wire rod processing system, wherein the first wire rod gripping device and the second wire rod gripping device position the wire rod on the center line of the wire rod cutting device.