Wire cutting device and wire processing system

Abstract

A wire cutting device (93) is provided with a cutting main body portion (934) including a rotating disk (2) rotating about a center line (CL1) and a rotating ring (3) rotating about the center line (CL1) and having a ring portion (3a) radially outside the rotating disk (2) and moving in parallel with the center line (CL1). The rotating disk (2) is provided with a cutting sheet (56), a slider (54) for mounting the cutting sheet (56) and moving in the radial direction in a manner to move between a first position where the cutting sheet (56) is separated from a wire (WR) on the center line (CL1) and a second position where the cutting sheet (56) is cut into the wire (WR), and a direction changing portion (E) for moving the cutting sheet (56) to the second position by a distance (Lb) corresponding to a phase angle (θa) of the ring portion (3a) from an initial phase position where the ring portion (3a) is positioned in the rotating direction of the rotating disk (2) from the first position.

Description

Technical Field

[0001] This disclosure relates to wire cutting apparatus and wire processing system. Background Technology

[0002] Patent document 1 describes a coating stripping device that uses multiple rotating blades to cut the coating portion of a coated cable along the thickness direction, causing the cut coating to move along the long side of the coated cable, thus exposing the core material.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 5699121 Summary of the Invention

[0006] While the coating stripping device described in Patent Document 1 can peel off the coating, it cannot reduce the diameter of the metal wire by cutting. Furthermore, in the structure of the coating stripping device described in Patent Document 1, even assuming that cutting to reduce the wire diameter is possible, this operation only applies to the ends of the wire and cannot reduce the diameter of the middle portion after removing the ends. Therefore, a wire cutting device capable of reducing the diameter of the middle portion of a metal wire by cutting, and a wire processing system comprising a wire cutting device and a wire processing apparatus for processing the wire cut by the wire cutting device into a product, are desired.

[0007] A wire cutting apparatus provided in one or more embodiments of the first aspect includes a cutting main body comprising a rotating disk rotating about a center line and a rotating ring rotating about the center line and having an annular portion on the radially outer side of the rotating disk. The cutting main body moves in a direction parallel to the center line. The rotating disk includes: a cutting sheet; a slider for mounting the cutting sheet and moving radially such that the cutting sheet moves relative to a wire disposed on the center line between a first separation position and a second position cutting into the wire; and a direction changing unit that moves the slider such that the cutting sheet moves toward the second position by a distance corresponding to the phase angle of the ring portion relative to the rotation direction of the rotating disk at the first position, i.e., the initial phase position.

[0008] According to the first method, the cutting sheet can be cut and rotated at the middle position of the wire based on the circumferential position of the rotating ring relative to the rotating disk, and the cutting body can be moved parallel to the extension direction of the wire. Therefore, according to the first method, the diameter of the middle portion of the wire can be reduced by cutting.

[0009] A second embodiment of a wire processing system includes: an unwinding machine for drawing wire from a coil; a first wire holding device and a second wire holding device for positioning the wire drawn from the unwinding machine in a straight-line manner; a wire processing apparatus for processing the wire from the second wire holding device; and a wire cutting device disposed between the first wire holding device and the second wire holding device, wherein the wire cutting device is the aforementioned wire cutting device, and the first wire holding device and the second wire holding device position the wire on the center line of the wire cutting device.

[0010] According to the second method, the wire processing system includes a wire cutting device internally disposed between the unwinding machine and the wire processing unit. The wire cutting device is capable of cutting and rotating the cutting sheet at the middle position of the wire drawn from the unwinding machine, based on the circumferential position of the rotating ring relative to the rotating disk, and moving the cutting body parallel to the extension direction of the wire. Therefore, according to the second method, the diameter of the middle portion of the wire can be reduced by cutting.

[0011] According to one or more embodiments, the diameter of the middle part of the metal wire can be reduced by cutting. Attached Figure Description

[0012] Figure 1 This is a diagram showing the overall structure of a wire processing system ST, which represents one or more implementations of a wire processing system.

[0013] Figure 2 This describes the internal structure of the wire cutting device 93 in the ST wire processing system. Figure 1 A sectional view at position S2-S2 in the diagram.

[0014] Figure 3 yes Figure 2 A partial sectional view at position S3-S3.

[0015] Figure 4 This is a diagram showing the wire cutting device 93 viewed from the upstream side.

[0016] Figure 5 This diagram illustrates the sheet feeding operation of the sheet feeding unit 5 in the wire cutting device 93.

[0017] Figure 6 This is a diagram illustrating an embodiment of the relationship between the rotational speed of the rotary disk 2, the cutting rotary ring 3, and the feed motor 932 and time during the wire cutting process of the wire cutting device 93.

[0018] Figure 7This diagram shows the state in which the cutting section AR is formed in the middle part of the wire WR by the wire cutting device 93.

[0019] Figure 8 It means Figure 6 The diagram shows a variation of the relationship in Example 1.

[0020] Figure 9 It means Figure 6 The diagram shows a variation of the relationship in Example 2.

[0021] Figure 10 It means Figure 6 The diagram shows a variation of the relationship in Example 3. Detailed Implementation

[0022] The present invention describes one or more embodiments of a wire cutting device and a wire processing system using a wire cutting device 93 and a wire processing system ST. Figure 1 This is a diagram showing the overall structure of a wire processing system ST, which represents one or more implementation methods of a wire processing system. The vertical and upstream / downstream directions are defined as... Figure 1 The direction indicated by the middle arrow. Upstream and downstream correspond to the direction of travel (feed direction) of the wire WR. Figure 1 The left side is the downstream direction, and the right side is the upstream direction.

[0023] The wire processing system ST is configured to include a feeding device 912, a wire cutting device 93, a second wire holding device 94, and a wire processing device 95. The feeding device 912 includes an unwinding machine 91 and a first wire holding device 92. That is, the wire cutting device 93 is internally disposed between the feeding device 912 and the wire processing device 95.

[0024] A coil WRa of metal wire WR is mounted on the unwinding machine 91. The wire WR is fed from the coil WRa mounted on the unwinding machine 91 toward the first wire holding device 92. The first wire holding device 92 determines the travel position of the wire WR fed from the unwinding machine 91 and stably feeds the wire WR.

[0025] The wire cutting device 93 performs a cutting process to reduce the outer diameter of the wire WR supplied from the first wire holding device 92. A second wire holding device 94 is disposed downstream of the wire cutting device 93 in the wire feeding direction. The second wire holding device 94 feeds the wire WR from the wire cutting device 93 downstream, maintaining its travel position stably corresponding to that of the first wire holding device 92. Figure 1The center line CL1, which serves as the first center line, is the axis of the wire. The travel position of the wire WR is stably determined between the first wire holding device 92 and the second wire holding device 94, thus enabling high-precision cutting by the wire cutting device 93.

[0026] The wire processing device 95 performs cutting, bending and other mechanical processing on the wire WR sent from the second wire holding device 94 to process it into the desired shape and discharge it as product Pd.

[0027] like Figure 1 As shown, the wire cutting device 93 includes a guide rail 931, a feed motor 932 (a third motor), a traveling slider 933, and a cutting body 934. The guide rail 931 is laid on the floor FL. The traveling slider 933 engages with the guide rail 931 and moves along the guide rail 931 within a predetermined range (refer to arrow DR) according to the rotation of a ball screw (not shown). The ball screw is rotated by the feed motor 932. The operation of the feed motor 932 is controlled, for example, by a control unit CT housed in the cutting body 934. The control unit CT may also be not housed in the cutting body 934, and its placement is not limited.

[0028] Reference Figures 2-4 The wire cutting device 93 is described in detail. Figure 2 This describes the internal structure of the wire cutting device 93 in the ST wire processing system. Figure 1 A sectional view at position S2-S2 in the diagram.

[0029] Figure 3 yes Figure 2 A partial sectional view at position S3-S3. Figure 4 This is a diagram showing the wire cutting device 93 as viewed from the supply side (upstream side) of the wire WR. In addition to the aforementioned upstream, downstream, and vertical directions, [the following is also mentioned]... Figure 2 The arrows indicate left and right directions. The left and right sides of the arrows correspond to left and right when viewed from the upstream side.

[0030] Figure 2 The diagram shows a wire cutting device 93, which includes a cutting body 934 that moves in a direction parallel to the center line CL1. The wire cutting device 93 includes a rotating disk 2 that rotates around the center line CL1 and a cutting rotating ring 3 that rotates around the center line CL1 and has an annular portion 3a on the radially outer side of the rotating disk 2.

[0031] The rotary disk 2 includes a cutting sheet 56, a slider 54, and a direction-changing unit E. The slider 54 is used to mount the cutting sheet 56 and moves radially such that the cutting sheet 56 moves relative to the wire WR disposed on the center line CL1 between a first separation position and a second engagement position. The direction-changing unit E moves the slider 54 such that the cutting sheet 56 moves toward the second position by a distance Lb corresponding to the phase angle θa of the ring portion 3a at the first position relative to the rotation direction of the rotary disk 2, i.e., the initial phase position of the ring portion.

[0032] In addition, Figure 1 The image shows including Figure 2 The wire processing system ST of the wire cutting device 93 shown. Figure 2 In this paper, the movement of the slider 54 by distance Lb is represented as the movement of the cam follower 53 by distance Lb, which moves integrally with the slider 54. The position of the cam follower 53 after moving by distance Lb is shown by a two-dotted line.

[0033] That is, the wire processing system ST includes an unwinding machine 91, a first wire holding device 92 and a second wire holding device 94, a wire processing device 95, and a wire cutting device 93. The unwinding machine 91 draws the wire WR from the coil WRa of the wire WR. The first wire holding device 92 and the second wire holding device 94 position the wire WR drawn from the unwinding machine 91 in a straight-line manner. The wire processing device 95 processes the wire WR from the second wire holding device 94. The wire cutting device 93 is disposed between the first wire holding device 92 and the second wire holding device 94. The first wire holding device 92 and the second wire holding device 94 position the wire WR on the centerline CL1 of the wire cutting device 93.

[0034] like Figure 2 or Figure 3 As shown, the wire cutting device 93 is configured to include a housing 1, a rotary disk 2, a cutting rotary ring 3, a retainer plate 4, three sheet feed sections 5 (5A, 5D, 5C), a base sleeve 6, a first gear disk 7, and three bearings (first bearing 8, second bearing 9, and third bearing 10).

[0035] Shell 1 is a roughly rectangular outer shell. For example... Figure 3 As shown, the retainer plate 4 has a circular hole 4a centered on the center line CL1 (see reference). Figure 3 It is fixedly positioned inside the housing 1 in an orientation orthogonal to the center line CL1.

[0036] The cutting-in rotating ring 3 is a generally annular component, with a third bearing 10, which serves as a crossed roller bearing, sandwiched between it and the circular hole 4a of the retainer plate 4, thereby enabling free rotation. The cutting-in rotating ring 3 has three cam push rods 51 mounted at 120° intervals on the peripheral portion, i.e., the ring portion 3a, on the downstream side. The cam push rods 51 have cylindrical push rod portions 51a at their front ends protruding downstream from the cutting-in rotating ring 3. On the peripheral portion on the upstream side of the cutting-in rotating ring 3, a second tooth portion 31 in the shape of a spur gear is formed.

[0037] The outer rings of the first bearing 8 and the second bearing 9 are fixed on the upstream and downstream sides of the inner circumferential surface of the rotating ring 3, respectively. The first bearing 8 and the second bearing 9 are radial ball bearings, and the first bearing 8 is a self-aligning type.

[0038] The inner rings of the first bearing 8 and the second bearing 9 are fixed to the outer circumferential surface of the base sleeve 6. The base sleeve 6 is a cylindrical metal component with a through hole 6a. The inner diameter of the through hole 6a is larger than the maximum diameter of the wire WR that can be cut by the wire cutting device 93. A first gear disk 7 is installed at the upstream end of the base sleeve 6. The base sleeve 6 and the first gear disk 7 are integrated and rotate synchronously via connecting parts 11 such as locating pins. A rotating disk 2 is installed at the downstream end of the base sleeve 6. The base sleeve 6 and the rotating disk 2 are integrated and rotate synchronously via connecting parts 12 such as locating pins.

[0039] like Figure 2 As shown, the outer periphery of the rotating ring 3, which is cut into the radial side of the rotating disk 2, is visually confirmed as a ring-shaped portion 3a.

[0040] A first tooth portion 71 in the shape of a spur gear is formed on the outer periphery of the first gear disk 7. The tip circle of the first tooth portion 71 of the first gear disk 7 is smaller than the tip circle of the second tooth portion 31 of the downstream tangent rotating ring 3.

[0041] Three sheet feed sections 5A, 5D, and 5C are arranged at 120° intervals around the center line CL1 on the downstream side of the cutting rotating ring 3 and the rotating disk 2. The three sheet feed sections 5 (5A, 5D, and 5C) have the same structure.

[0042] The sheet feed unit 5 (5A, 5D, 5C) is configured to include a cam push rod 51, a cam rod 52, a sliding base 55, a cam follower 53, a slider 54, a cutting sheet 56, a tension coil spring 57, a first hook pin 21, and a second hook pin 542. In the structure of the sheet feed unit 5, the cam push rod 51, which has a push rod portion 51a, is directly mounted to the cutting rotary ring 3. The cam rod 52, the sliding base 55, and the first hook pin 21 are directly mounted to the rotary disk 2.

[0043] The cam rod 52 can rotate about a rotation axis CL52 extending along the wire feeding direction. For example... Figure 2 As shown, the cam lever 52 has a first wrist 52a extending radially outward from the position of the rotation axis CL52 and a portion extending radially outward from the position of the rotation axis CL52 along... Figure 2 The second wrist 52b extends counterclockwise in a circumferential direction and is formed in an inverted L-shape.

[0044] Relative to the rotating disk 2, the cutting rotating ring 3 is positioned in the circumferential direction such that the first wrist 52a of the cam rod 52 extends in the diameter of the rotating disk 2 and abuts against the counterclockwise end of the cam push rod 51.

[0045] The sliding base 55 has a guide hole 551 extending parallel to the diameter of the rotating disk 2 (see reference). Figure 2 The slider 54 is fixed to the rotating disk 2. The slider 54 is movable along the guide hole 551 and is engaged and held (see arrow DR3). The slider 54 is a radially elongated component that is equipped with a cam follower 53, a second hook pin 542, and a cutting sheet 56.

[0046] The cam follower 53 is mounted on the radial outer edge of the slider 54 in a cylindrical manner protruding towards the downstream side. The second hook pin 542 is mounted protruding towards the right side of the slider 54. A tension spring 57 is suspended radially between the first hook pin 21 and the second hook pin 542, which are erected on the rotating disk 2, with an elongation greater than its natural length. Through the tension (compression force) of the stretched tension spring 57, the slider 54 is forced towards the cam rod 52, and the cam follower 53 is always in contact with the surface on the side of the centerline CL1 of the second wrist portion 52b of the cam rod 52 in a forceful manner.

[0047] The position where the cam follower 53 abuts against the second wrist 52b is located on one side relative to the radius connecting the rotation axis CL52 and the center line CL1 (in this example, on the right side). Figure 2 (Left side of the middle)

[0048] The cutting sheet 56 is mounted at the end of the slider 54 on the side of the center line CL1, and has a cutting tool 56a with a cutting wire WR at the front end. Figure 2 The diagram shows the first wrist 52a of the cam lever 52 in a position extending diametrically, with the cam follower 53 abutting against the second wrist 52b. At this time, the cutter 56a of the cutting sheet 56 is located at a first position separated by a predetermined distance from the outer circumferential surface of the wire WR, which is positioned with the centerline CL1 as the central axis. This first position, where the cutting sheet 56 is separated from the wire WR, is defined as the standby state of the sheet feed unit 5. The predetermined distance is, for example, approximately 0.5 mm relative to the wire WR with a diameter of 3.0 mm.

[0049] like Figure 4As shown, the first tooth 71 of the first gear disk 7 meshes with the output gear 721 of the sheet rotation motor 72 (first motor). Thus, the first gear disk 7 rotates under the drive of the sheet rotation motor 72. The second tooth 31 of the cutting rotation ring 3 meshes with the output gear 321 of the cutting rotation motor 32 (second motor). Thus, the cutting rotation ring 3 rotates under the drive of the cutting rotation motor 32. The rotation directions of the first gear disk 7 and the cutting rotation ring 3 are... Figure 4 The middle direction is clockwise (arrow DR1).

[0050] like Figure 3 As shown, the cutting rotating ring 3 is rotatable relative to the retainer plate 4 via the third bearing 10, and rotatable relative to the base sleeve 6 via the first bearing 8 and the second bearing 9. Thus, the cutting rotating ring 3 rotates at a speed V3 corresponding to the rotational speed of the cutting rotating motor 32 (see reference). Figure 6 Rotate.

[0051] The rotating disk 2 rotates integrally with the base sleeve 6 via connecting member 12, and the base sleeve 6 rotates integrally with the first gear disk 7 via connecting member 11. Thus, the rotating disk 2 and the first gear disk 7 rotate integrally at a speed V2 corresponding to the rotational speed of the sheet rotation motor 72 (see reference). Figure 6 Rotation. In addition, a first bearing 8 and a second bearing 9 are sandwiched between the rotating disk 2 and the cutting rotating ring 3, so the rotating disk 2 and the cutting rotating ring 3 can rotate independently at different speeds.

[0052] Compared to Figure 2 When the sheet feed unit 5 is in standby mode, the phase position of the rotation direction of the cutting rotating ring 3 of the rotating disk 2 is determined by taking a 360° rotation as one cycle. The phase position relative to the rotating disk 2 with the same rotational angular velocity as the cutting rotating ring 3 is set as the initial phase position, and its phase angle is set as the phase angle θa. That is, the state in which the cutting rotating ring 3 rotates relative to the rotating disk 2 with a phase angle θa behind is the standby state, which is the initial phase position. In addition, due to the difference in angular velocity of the rotating disk 2 with a different rotational angular velocity than the cutting rotating ring 3, the phase angle θa changes from the initial state when the phase difference of the rotation angle changes.

[0053] Phase angle θa along the tangent rotation ring 3 Figure 2 The value is positive when generated in the counterclockwise direction (arrow DR2) and negative when generated in the counterclockwise direction.

[0054] The wire cutting device 93 changes the phase of the cutting rotating ring 3 relative to the rotating disk 2 from... Figure 2When the standby state of the sheet feed unit 5 shown is changed to the counterclockwise direction indicated by arrow DR2, the slider 54 and the cutting sheet 56 mounted on the slider 54 can move in a direction close to the center line CL1. That is, the wire cutting device 93 has a direction changing unit E that converts the rotational movement of the cutting rotating ring 3 into radial movement of the slider 54. The direction changing unit E is configured to include a cam push rod 51 and a cam rod 52. (Refer to...) Figure 5 The explanation is that the movement of the rotating ring 3 in the direction of rotation is transformed into the radial movement of the slider 54.

[0055] Figure 5 This diagram illustrates the sheet feeding operation of the sheet feed unit 5 included in the wire cutting device 93. Specifically, Figure 5 This illustrates the state in which the cutting ring 3 is offset by a phase angle θa relative to the rotating disk 2, in the direction of arrow DR4, i.e., counterclockwise (positive direction). That is, Figure 5 The phase angle is shifted in the positive direction from the initial phase angle θa to a state with zero phase difference. In this way, the cutting rotating ring 3 shifts in the positive direction relative to the rotating disk 2 from the standby state of the sheet feed section 5, and the state in which the cutting sheet 56 is moved to the second position of the cutting wire WR is called the cutting state.

[0056] exist Figure 5 In the wire cutting device 93 shown, the direction changing unit E has a cam push rod 51 and a cam rod 52. The cam push rod 51 is installed on the ring 3a, and the cam rod 52 is installed on the rotary disk 2 and abuts against the cam push rod 51. By rotating at a rotation angle corresponding to the phase angle θa of the ring 3a, the slider 54 is pushed toward the center line CL1, causing it to move a distance Lb corresponding to the rotation angle.

[0057] exist Figure 5 In the middle, when the cutting rotating ring 3 rotates counterclockwise from the standby position (refer to arrow DR4), the cam push rod 51 pushes the first wrist 52a of the cam rod 52 towards... Figure 5 Push to the left. As a result, the cam rod 52 rotates counterclockwise around the rotation center CL51 (refer to arrow DR5). When the cam rod 52 rotates counterclockwise, the second wrist 52b presses the cam follower 53 toward the center line CL1 (refer to arrow DR6).

[0058] The slider 54, equipped with a cam follower 53, can move radially relative to the sliding base 55 along the rotating disk 2. Furthermore, the force transmitted from the cutting rotary motor 32, causing the cutting rotating ring 3 to rotate counterclockwise relative to the rotating disk 2, is set to be greater than the tension (compression force) of the tension spring 57. Therefore, the slider 54 moves against the tension spring 57 in a manner that further stretches it, and the cutting sheet 56 moves relative to the wire WR to the cutting position. Figure 5 The cam follower 53 in the standby state before movement is shown by two dashed lines.

[0059] Cut into rotating ring 3 from Figure 5 The position of the cut-in state shown is offset by a phase angle θa in the clockwise direction (negative direction). When the cam push rod 51 moves in the opposite direction to arrow DR4, the cam rod 52 is pushed radially outward by the cam follower 53, which is subjected to the compressive force of the tension disc spring 57. Therefore, the cam rod 52 rotates clockwise around the rotation axis CL52 in a manner that follows the cam push rod 51 via the cam follower 53, and returns to the standby state.

[0060] Next, the relationship between the rotational speed of the rotating disk 2 and the cutting rotating ring 3 and time in the wire cutting process of the wire WR in the wire cutting device 93 will be explained. If the rotational speed of the rotating disk 2 per unit time is set as rotational speed V2, and the rotational speed of the cutting rotating ring 3 per unit time is set as rotational speed V3, then the relative rotational direction of the cutting rotating ring 3 relative to the rotating disk 2 is determined according to the magnitude of rotational speed V3 relative to rotational speed V2.

[0061] Specifically, set the rotation direction to Figure 2 and Figure 5 counterclockwise direction ( Figure 5 (As indicated by arrow DR4 in the diagram), when rotational speed V2 = rotational speed V3, the rotating disk 2 and the cutting rotating ring 3 rotate synchronously without relative rotation. When rotational speed V2 < rotational speed V3, the cutting rotating ring 3 rotates relative to the rotating disk 2 along... Figure 2 and Figure 5 The relative rotation is counterclockwise. With rotational speed V2 > rotational speed V3, the cutting-in rotating ring 3 relative to the rotating disk 2 rotates along... Figure 2 and Figure 5 They rotate clockwise relative to each other.

[0062] Therefore, the control unit CT first sets the cutting rotating ring 3 to the initial phase position by putting the sheet feed unit 5 into a standby state, so that the rotating disk 2 and the cutting rotating ring 3 move at, for example... Figure 2 The state shown rotates at the same speed. Then, the speed V3 of the cutting-in rotating ring 3 is made faster than the speed V2 of the rotating disk 2. Thus, the cutting-in rotating ring 3 relative to the rotating disk 2 rotates at... Figure 5A phase shift occurs in the counterclockwise direction, and the sheet feed section 5 moves toward the center line CL1, giving the cutting sheet 56 a cutting amount corresponding to the circumferential relative movement of the cutting rotating ring 3.

[0063] Furthermore, the control unit CT drives the feed motor 932, causing the cutting body 934 to move within a predetermined range in the wire feeding direction of the wire WR. This allows for cutting within a desired cutting range in the middle of the wire WR with a predetermined depth of cut, forming a small-diameter cutting section AR (see reference). Figure 7 ).

[0064] Figure 6 This is a diagram illustrating an embodiment of the relationship between the rotational speeds of the rotary disk 2, the cutting rotary ring 3, and the feed motor 932 and time during the cutting process of the wire cutting device 93. More specifically, Figure 6 In the diagram, the rotational speed V2 of the rotary disk 2 is represented by a solid line, the rotational speed V3 of the cutting rotary ring 3 is represented by a dashed line, and the rotational speed V932 of the feed motor 932 is represented by a dotted line. In the following description, speeds Va, Vb, Vc, and Vd represent rotational speeds (rpm). Furthermore, the initial position of the cutting body 934 along the wire WR is... Figure 1 The initial position P1 of the upstream end of the indicated movement range.

[0065] The wire cutting device 93 includes a sheet rotation motor 72 that rotates the rotary disk 2, a cutting rotation motor 32 that rotates the cutting rotating ring 3, and a control unit CT that controls the operation of the sheet rotation motor 72 and the cutting rotation motor 32. The control unit CT is configured to change the phase angle θa of the ring portion 3a during a period tp when the rotational speed V3 of the rotating ring becomes greater than the rotational speed V2 of the rotary disk 2. The sheet rotation motor 72, the cutting rotation motor 32, and the control unit CT are shown in the figure. Figure 4 Rotational speed V2, rotational speed V3, and time period tp are shown in Figure 6 .

[0066] (1) Time t0 to time t1: The control unit CT activates the sheet rotation motor 72 and the cutting rotation motor 32, making the rotation speeds V2 and V3 equal and increasing from speed 0 (zero) to speed Va with a constant angular acceleration. As a result, the rotating disk 2 and the cutting rotation ring 3 rotate synchronously at speed Va at time t1.

[0067] (2) Time t1 to time t2: The control unit CT keeps the rotational speed V2 constant at time t1, which is speed Va. The rotational speed V3 continues to increase after time t1, reaching speed Vb at time t2. The angular acceleration that increases the rotational speed V3 during this period is not limited; for example, it can be assumed to be the same as the angular acceleration from time t0 to time t1. Thus, the rotating disk 2 rotates at a constant speed, and the interlocking rotating ring 3 relative to the rotating disk 2... Figure 2 The phase is offset counterclockwise.

[0068] (3) Time t2~Time t3

[0069] The control unit CT keeps the rotating disk 2 at a constant speed Va, and reduces the rotational speed V3 from speed Vb to speed Va. The angular acceleration that reduces the rotational speed V3 is not limited; for example, it can be set to the negative of the absolute value of the angular acceleration from time t1 to time t2. The period from time t1 to time t3 during which the rotational speed V3 of the inserted rotating ring 3 is greater than the rotational speed V2 of the rotating disk 2 is defined as period tp.

[0070] Therefore, relative to the rotating disk 2, the cutting rotating ring 3 is at a predetermined phase angle θa (refer to...). Figure 2 The circumferential position of the cutting sheet is generated and the phase is maintained. Simultaneously, the cutting sheet is given a cutting amount corresponding to the phase angle, and while rotating around the circumferential surface of the wire WR, it cuts into the wire WR. Thus, the control unit CT sets a period tp during which the rotational speed V3 of the cutting rotating ring 3 is increased compared to the rotational speed V2 of the rotating disk 2, generating a phase angle θa for the ring 3a.

[0071] (4) Time t3~time t4

[0072] By cutting sheet 56, a predetermined amount of cutting is performed on the wire WR at its initial position. The period from time t3 to time t4 can be a short period, or it can be a period of 0 (zero) from time t3 to time t4.

[0073] (5) Time t4 ~ Time t5 ~ Time t6

[0074] The control unit CT actuates the feed motor 932, increasing its rotational speed V932 from 0 (zero) to a speed Vc at time t5, then decreasing it to 0 (zero) again at time t6. The angular acceleration that increases and decreases the rotational speed V932, and its time variation, are not limited; for example, they can be assumed to be constant angular acceleration.

[0075] The time variation of rotational speed V932 Figure 6 The shape is represented by a convex triangle. 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 distance L6 corresponding to the area A6 of the triangle shape during the period from time t4 to time t6 (refer to...) is the distance L6 that the cutting body 934 moves along the extension direction of the wire WR. Figure 1 The position of the wire cutting device 93 after moving a distance L6 is set as the moved position P2. As a result, the wire WR is cut by the wire cutting device 93 within a range of distance L6 with a predetermined cutting depth, resulting in a smaller diameter.

[0076] The wire cutting device 93 includes a feed motor 932, which, under the control of the control unit CT, moves the cutting body 934 in a direction parallel to the centerline CL1. When the cutting sheet 56 is in the second position, the control unit CT activates the feed motor 932 to move the cutting body 934 in a direction parallel to the centerline CL1. The feed motor 932 is shown in... Figure 1 Under the control of the CT in the control unit, such as Figure 6 As shown, after period tp, the cutting body 934 is driven to move parallel to the center line CL1.

[0077] Figure 7 This diagram illustrates the state in which a smaller diameter portion is formed in the middle section of the wire WR by the wire cutting device 93. This cut portion is referred to as the cutting section AR. For example, if the wire diameter Da of the wire WR is 3.0 mm, and the middle section of the wire WR, after removing the end, is cut with a cutting depth Dc of 0.5 mm by the cutting sheet 56, a small diameter portion Db of 2.0 mm is formed along the distance La of the wire WR; this is the cutting section AR. Figure 7 In the process, the cutting sheet 56 cuts the wire WR while moving from the initial position P1 to the moved position P2.

[0078] Cutting the main body 934 Figure 6 When the rotational speed V932 shown is positive, it is directed towards Figure 1 It moves upstream, and when it is negative, it moves downstream.

[0079] (6) Time t6 to time t7

[0080] After time t6, the predetermined amount of cutting of the cutting sheet 56 to the wire WR is performed at the moved position P2. Figure 6 The period from time t6 to time t7 can be a short period, or the period from time t6 to time t7 can be 0 (zero).

[0081] (7) Time t7 ~ Time t8 ~ Time t9

[0082] The control unit CT reduces the rotational speed V2 of the rotary disk 2 and the rotational speed V3 of the cutting rotating ring 3 to zero at times t8 and t9, respectively. The reduction in angular acceleration is not limited. However, to ensure that the cutting rotating ring 3, whose phase changed between times t1 and t3, returns to its initial phase position, the time t9 when the rotational speed V3 becomes zero is set later than time t8. As a result, the sheet feed unit 5 moves radially outward, and the cutting sheet 56 disengages from the wire WR.

[0083] (8) Time t9~time t10~time t11

[0084] The control unit CT stops the rotation of the rotary disk 2 at time t8, stops the rotation of the cutting rotary ring 3 at time t9, and then causes the feed motor 932 to rotate in the opposite direction to perform the actions from time t4 to time t6, returning the cutting main body 934 from the moved position P2 to the initial position P1.

[0085] The cutting operation of forming a smaller diameter cutting section AR in the middle part of the wire WR is now complete.

[0086] As described above, the wire cutting device 93 can perform cutting on the middle part of the wire WR at any length with any cutting depth, forming a cut section AR with a reduced diameter.

[0087] The wire cutting device 93 includes a rotary disk 2, a cutting rotary ring 3, and a sheet feed unit 5 including a direction changing unit E that enables the cutting sheet 56 to cut into the wire WR. Therefore, by setting the control unit CT to a period where the rotational speed V3 of the cutting rotary ring 3 is greater than the rotational speed V2 of the rotary disk 2, the cutting of the three cutting sheets 56 into the wire WR can be performed with high precision and low cutting depth corresponding to this period. Thus, the wire cutting device 93 has a simple structure, easy control of the cutting depth, and good cutting results.

[0088] Furthermore, the wire cutting device 93 can be internally installed between the unwinding machine 91 and the wire processing device 95. This allows for the production of products with different wire diameters in the middle section on the same production line, thus enabling small-batch, multi-variety production and improving production efficiency.

[0089] The embodiments of the present invention are not limited to the structure described above, and modifications can be made without departing from the spirit of the invention. For example, even if the rotational speed V3 of the cutting-in rotating ring 3 is less than the rotational speed V2 of the rotating disk 2, the phase shift can be reduced. The control unit CT is not limited to setting a period tp during which the rotational speed V3 of the cutting-in rotating ring 3 is greater than the rotational speed V2 of the rotating disk 2; a period during which the rotational speed V3 of the cutting-in rotating ring 3 is less than the rotational speed V2 of the rotating disk 2 can also be set. In this way, by making the rotational speed V2 of the rotating disk 2 and the rotational speed V3 of the cutting-in rotating ring 3 different, the phase of the cutting-in rotating ring 3 relative to the rotating disk 2 can be adjusted.

[0090] (Variation Example 1)

[0091] Figure 8 It means Figure 6 The graph shown illustrates a variation of Example 1, illustrating the relationship between rotational speed and time in the embodiment. Variation 1 is as follows: the time variation of rotational speeds V2 and V3 with... Figure 6 Similar to the embodiment shown, in the cutting of the wire WR by the cutting sheet 56, the feed motor 932 causes the cutting body 934 to move in a reciprocating motion instead of the single-pass motion described above.

[0092] Figure 8 The times t11 to t13 and t27 to t29 in the examples correspond to the embodiments respectively. Figure 6 The times t1 to t3 and t7 to t9 are specified. Additionally, the rotational speeds Va1, Vb1, Vc1, and Vd1 correspond to the embodiments described above. Figure 6 The rotational speeds Va, Vb, Vc, and Vd are given.

[0093] The control unit CT drives the feed motor 932, causing the cutting body 934 to move the position of the cutting sheet 56 from the initial position P1 to the moved position P2 during the period t14 to t17, and then return from the moved position P2 to the initial position P1 during the period t17 to t20. Further, the control unit CT causes the cutting body 934 to move the position of the cutting sheet 56 from the initial position P1 to the moved position P2 during the period t20 to t23, and then return the position of the cutting sheet 56 from the moved position P2 to the initial position P1 during the period t23 to t26. That is, the control unit CT causes the cutting body 934 to perform two reciprocating movements at a predetermined distance while cutting the wire WR.

[0094] Through this reciprocating motion, the cutting part AR achieves good results. In addition, when the cutting depth of the cutting sheet 56 is large, the cutting depth is divided and reciprocated, thereby reducing the cutting load and extending the service life of the cutting sheet 56.

[0095] (Variation Example 2)

[0096] Figure 9 Make means Figure 6 The graph shows a variation 2 of the relationship between rotational speed and time in the illustrated embodiment. Variation 2 alters the rising characteristics of the rotating disk 2 and the cutting-in rotating ring 3. The control unit CT obtains a positive phase angle θa relative to the ring portion 3a of the cutting-in rotating ring 3 of the rotating disk 2 by making the angular acceleration of the rotation from the stopped state to the predetermined rotational speed Va2 different from the start of the rotational speed increase. Specifically, the control unit CT increases the rotational speed V2 of the rotating disk 2 from rotational speed 0 (zero) to reach rotational speed Va2 at time t32, and increases the rotational speed V3 of the cutting-in rotating ring 3 from rotational speed (zero) to reach rotational speed Va2 at time t31, which is earlier than time t32.

[0097] In this modified example 2, the cutting body 934 begins to cut into the wire WR before the rotational speed V3 reaches the predetermined rotational speed Va2. Therefore, when the wire WR is a free-machining material, the load on the cutting sheet 56 can be reduced while the cutting time is shortened.

[0098] (Variation Example 3)

[0099] Figure 10 It means Figure 6 The graph shows a variation of the rotational speed versus time relationship in the illustrated embodiment, Example 3. Variation 3, like Variation 2, alters the rising characteristics of the rotating disk 2 and the cutting-in rotating ring 3. The control unit CT obtains a positive phase angle θa of the ring portion 3a of the cutting-in rotating ring 3 corresponding to the cutting-in amount by making the angular acceleration of the rotational speed Va2 from the stop state different from the beginning of the speed increase. Specifically, the control unit CT increases the rotational speeds V2 and V3 from speed 0 (zero) to time t41 with the same angular acceleration, changes the angular acceleration from time t41, and makes the rotational speed V2 reach the predetermined speed Va3 at time t43. The rotational speed V3 reaches the predetermined speed Va3 at time t42, which is earlier than time t43.

[0100] In this modified example 3, the cutting of the wire WR is not performed during the low-speed phase of the rotational speed V3. Instead, the cutting of the wire WR begins after the rotational speed V3 increases to a certain level. Therefore, in cases where the wire WR is not a free-machining material, cutting at low speeds can be avoided, thereby suppressing the load on the cutting sheet 56 and shortening the cutting time.

[0101] It is possible to combine the embodiment and variation 3, and to combine the embodiment and variation 4. It is possible to combine variation 1 and variation 3, and to combine variation 1 and variation 4.

[0102] This application claims priority based on Japanese Patent Application No. 2021-107412, filed with the Japanese Patent Office on June 29, 2021, the entire disclosure of which is incorporated herein by reference.

Claims

1. A wire cutting device, characterized in that, It comprises: a cutting body, which includes a rotating disk rotating about a center line and a rotating ring rotating about the center line and having an annular portion on the radially outer side of the rotating disk; and the cutting body moves in a direction parallel to the center line; and The control unit is located either inside or outside the aforementioned cutting main body. The aforementioned rotating disk has: Cutting sheet materials; A slider is mounted on the aforementioned cutting sheet and moves radially relative to the wire disposed on the aforementioned centerline between a first position of separation and a second position of cutting into the aforementioned wire. as well as The direction-changing unit moves the slider such that it moves the cutting sheet toward the second position by a distance corresponding to the phase angle of the ring portion relative to the rotation direction of the rotating disk at the first position, i.e., the initial phase position. The aforementioned control unit controls as follows: The phase angle of the ring is generated by setting a period during which the rotational speed of the rotating disk is different from the rotational speed of the rotating ring. The slider is moved by the phase angle generated by the direction change unit, thereby maintaining the cutting sheet, which has moved to the second position, in a state where it cuts into the wire with a fixed cutting amount corresponding to the phase angle. While maintaining the state in which the cutting sheet cuts into the wire, the cutting body is moved in a direction parallel to the center line.

2. The wire cutting device according to claim 1, characterized in that, The aforementioned direction conversion unit has: A cam push rod, which is mounted on the aforementioned ring portion; and The cam rod, which is mounted on the rotating disk, pushes the slider toward the center line by abutting against the cam push rod and rotating by a rotation angle corresponding to the phase angle of the ring, so that it moves a distance corresponding to the rotation angle.

3. The wire cutting device according to claim 1, characterized in that, have: A first motor, which rotates the aforementioned rotating disk; and The second motor causes the aforementioned rotating ring to rotate; The aforementioned control unit controls the operation of the aforementioned first motor and the aforementioned second motor.

4. The wire cutting device according to claim 2, characterized in that, It is equipped with a third motor, which moves the cutting main body in a direction parallel to the center line. The aforementioned control unit controls the operation of the aforementioned third motor.

5. The wire cutting device according to claim 3, characterized in that, The control unit controls the movement of the cutting body to stop in a direction parallel to the center line, and then controls the operation of the first motor and the second motor to make the rotational speed of the rotating disk zero first, and the rotational speed of the rotating ring zero later, so that the cutting sheet returns to the initial phase position.

6. The wire cutting device according to claim 4, characterized in that, The aforementioned third motor drives the aforementioned cutting main body to move reciprocally in one or two directions along the aforementioned centerline.

7. A wire processing system, characterized in that, have: A winding machine that draws the aforementioned wire from the coil of the wire; A first wire holding device and a second wire holding device that position the wire drawn from the unwinding machine in a straight line; A wire processing apparatus for processing the wire from the second wire holding device described above; as well as A wire cutting device disposed between the first wire holding device and the second wire holding device. The above-mentioned wire cutting device is the wire cutting device according to any one of claims 1 to 6. The first wire holding device and the second wire holding device position the wire on the center line of the wire cutting device.

Images