Bending device and method for manufacturing edgewise bent flat wire

Abstract

This bending device is provided with: a first support body and a second support body which are arranged coaxially and which can move relative to each other in the axial direction so as to be capable of obtaining a working position in which the first support body and the second support body approach each other and a standby position in which the second support body and the second support body are separated from each other; a revolution jig which is driven to revolve around one of the first support body and the second support body; and a receiving jig supported by the other one of the first support body and the second support body, the bending device is configured so as to bend the flat wire by driving the revolution jig to revolve in a state in which the flat wire is clamped into an annular clamping groove defined by the first support body and the second support body being located at the working position, and the receiving jig is supported by the other one of the first support body and the second support body. The flat wire is bent along the edge in a manner that the flat wire is wound on the receiving clamp, and the receiving clamp is supported by the corresponding supporting body in a manner that the receiving clamp can rotate around the axis.

Description

TECHNICAL FIELD

[0001] The present application relates to a device for bending a flat wire in an edgewise direction, and a manufacturing method of an edgewise bent flat wire in which at least a part is bent in the edgewise direction. BACKGROUND

[0002] The edgewise bending in which a flat wire having a rectangular shape defined by first and second short sides and first and second long sides is bent in an edgewise direction with the first short side or the second short side as the inside of the bending is used when manufacturing a bus bar formed of a flat wire having an edgewise bent portion, an edgewise coil in which a flat wire is wound in a coil shape, and the like.

[0003] For example, as a winding device for manufacturing an edgewise coil, a device (hereinafter, referred to as a conventional device) having a spindle capable of moving up and down and capable of rotating around an axis, a cylindrical member fixed to a fixed base in a state of being inserted to the spindle, a core fixed to a lower end portion of the cylindrical member, a clamping member integrally provided to a lower end of the spindle in a manner of facing a lower end surface of the core, clamping a flat wire as a processed member in a plate thickness direction in cooperation with the core, and a revolved roller driven to rotate around the axis of the spindle outside a radial direction of the core and the clamping member is proposed (see Patent Document 1 below).

[0004] The core has a circular plate portion having a through hole into which the spindle is inserted, and a ring-shaped protruding portion protruding downward in a stepped manner from a radially outer portion of the circular plate portion.

[0005] The clamping member has a radially outer region facing the ring-shaped protruding portion, and a radially inner region protruding upward in a stepped manner from a radially inner end portion of the radially outer region, and the radially outer region forms a ring-shaped recess portion engaged with the ring-shaped protruding portion.

[0006] The ring-shaped protruding portion and the ring-shaped recess portion are arranged in a facing manner with a distance corresponding to a plate thickness of the flat wire as the processed member in the up and down direction, and a letter-shaped groove opened to a radially outer side is formed by the ring-shaped protruding portion, the ring-shaped recess portion, and an outer peripheral surface of the radially inner region of the clamping member.

[0007] In the conventional device, the flat wire is held in a state in which one short side (for example, the first short side) of the flat wire faces the radially inner region of the clamping member, and the flat wire is clamped in the plate thickness direction by the ring-shaped protruding portion and the ring-shaped recess portion. ​In this state, by driving the revolution roller to rotate about the axis of the main shaft, the flat wire is bent in the side-by-side direction by wrapping the short side (e.g., the first short side) around the outer peripheral surface of the radially inner region of the clamping member.

[0008] The existing device with this configuration is useful in suppressing the deformation of the cross-sectional shape of the flat wire during edge bending processing to a certain extent, since the flat wire is bent in the edge direction while being clamped in the thickness direction of the plate.

[0009] However, due to the formation of the All components of the groove are fixed around the axis of the main shaft. Therefore, a large frictional force is applied to the flat wire during edge bending, which may cause defects and / or dimensional deviations in the edge bending flat wire.

[0010] Existing technical documents

[0011] Patent documents

[0012] Patent Document 1: Japanese Patent Application Publication No. 2013-004873 Summary of the Invention

[0013] The present invention was made in view of such prior art, and its object is to provide a bending processing apparatus and a method for manufacturing flat wires that can bend flat wires along the edge direction while effectively preventing or reducing defects and / or dimensional deviations.

[0014] To achieve the aforementioned objective, the present invention provides a bending processing apparatus for bending a flat line with a rectangular cross-sectional shape defined by two opposing first and second short sides and two opposing first and second long sides in the direction of the edges. The bending processing apparatus comprises: a first support body having an end face facing the axial direction; a second support body having an end face facing the axial direction and coaxially disposed with the first support body; and a revolution clamp driven to move along the outer periphery of a revolution clamp-side support body that is one of the first and second support bodies. The device includes a receiving fixture supported on a receiving fixture side support, which is the other of the first and second supports. The first and second supports are movable relative to each other along their axial direction to achieve a working position where the end faces of the first and second supports are close to each other, and a standby position where the end faces are separated. The receiving fixture has a radially extending annular surface and an axially extending annular portion. The radially extending annular surface, when the first and second supports are in the working position, is separated from the first... The distance between the long side and the second long side, defined by the thickness of the flat line, is such that at least a portion of the end face of the orbital clamp side support faces the plate. The axially extending annular portion extends axially from the radially extending annular surface towards the end face of the orbital clamp side support. The end face of the orbital clamp side support, the radially extending annular surface, and the axially extending annular portion are configured to form an annular locking groove that opens radially outward when the first support and the second support are in the working position. The device is configured such that when the flat wire is driven to revolve in a bending preparation state where the first long side faces the end face of the revolving clamp side support, the second long side faces the radially extending annular face, and the first short side faces the outer peripheral face of the axially extending annular portion, the second short side is pressed so that the first short side wraps around the axially extending annular portion, thereby bending the flat wire in the edge direction, and the receiving clamp is supported on the receiving clamp side support in a manner that allows it to rotate about the axis.

[0015] The bending processing apparatus according to the present invention can bend flat wire in the edge direction while effectively preventing or reducing defects and / or dimensional deviations.

[0016] Preferably, the receiving clamp has a front end portion extending from the axial direction in an annular shape toward the front end side in the axial direction, and a bearing hole is provided on the end face of the revolution clamp support body. When the first support body and the second support body are in the working position, the front end portion is inserted into the bearing hole in a manner that allows it to rotate freely around the axis.

[0017] In the first embodiment, the first support body functions as the orbital clamp side support body, and the second support body functions as the receiving clamp side support body. The second support body is movable in the vertical direction to obtain a lowered position that defines the working position and an uppered position that defines the standby position.

[0018] In the second method, the first support body functions as the receiving fixture side support body, and the second support body functions as the orbital fixture side support body. The second support body can move in the vertical direction to obtain a lowered position that defines the working position and an uppered position that defines the standby position.

[0019] In all the aforementioned configurations, the receiving fixture is supported on the receiving fixture side support via a bearing member having an inner ring body, an outer ring body, and rolling elements inserted between the inner ring body and the outer ring body.

[0020] Preferably, the bearing component is a crossed roller bearing.

[0021] For example, the inner ring body is connected to the receiving clamp, and the outer ring body is connected to the side support of the receiving clamp.

[0022] Instead, the inner ring body is connected to the receiving clamp side support body, and the outer ring body is connected to the receiving clamp.

[0023] In the first embodiment, the orbital clamp may have: a main body, including an opposing portion facing the outer peripheral surface of the orbital clamp side support and a pressing portion extending outward in the axial direction from the orbital clamp side support and pressing the second short side of the flat wire; and a cover portion connected to the main body in a manner that allows it to swing about the swing axis.

[0024] The cover is configured such that, in the bending preparation state where the flat wire is inserted into the annular insertion groove, it can obtain a holding position that covers at least a portion of the portion of the flat wire located radially outward from the radially extending annular surface, and a retraction position that does not overlap with the flat wire in the bending preparation state when viewed from above.

[0025] In the second embodiment, the radial length of the area where the flat wire is disposed on the end face of the orbital clamp side support is the same as the width of the flat wire defined by the distance between the first short side and the second short side. The radially extending annular surface is configured such that the radially inner end point is located at the same radial position as the radially inner end point of the area, and the radially outer end point is located at the same radial position as the radially outer end point of the area or extends radially outward beyond the radially outer end point of the area. In this case, the orbital clamp has an opposing portion facing the outer peripheral surface of the orbital clamp side support, and a pressing portion extending from the opposing portion at a position located outward in the axial direction from the orbital clamp side support and pressing the second short side of the flat wire. The pressing portion has a length less than the thickness of the flat wire defined by the distance between the first long side and the second long side.

[0026] Preferably, the radially extended annular surface has its radially outer end point and the radially outer end point of the set area are located at the same position in the radial direction.

[0027] Preferably, the pressing portion is configured to have a length of more than 1 / 2 of the thickness of the flat line.

[0028] More preferably, the pressing portion is configured to have a length of more than 1 / 2 and less than 4 / 5 of the thickness of the plate having the flat line.

[0029] Furthermore, the present invention provides a method for manufacturing an edge-bent flat wire, which involves using a bending processing device to bend at least a portion of the flat wire in the edge direction to manufacture the edge-bent flat wire. The cross-sectional shape of the flat wire is a rectangular shape defined by a first short side and a second short side facing each other and a first long side and a second long side facing each other. The bending processing device includes: a first support body having an upper end face; a second support body having a lower end face and coaxially disposed with the first support body; a revolving clamp driven to revolve along the outer peripheral surface of the first support body; and a receiving clamp supported on the second support body. The second support body is movable along its axial direction to achieve a working position where the upper end face of the first support body is close to the lower end face of the second support body, and a standby position where the upper end face is separated from the lower end face. The receiving clamp is supported on the second support body in a manner rotatable about its axis, and has a radially extending annular surface and an axially extending annular portion. When the second support body is in the working position, the radially extending annular surface is spaced at a distance equivalent to the thickness of the flat line defined by the distance between the first long side and the second long side. At least a portion of the upper end face of the first support body faces each other, and the axially extending annular portion extends axially from the radially inner end of the radially extending annular surface toward the upper end face of the first support body. The area where the flat wire is set in the upper end face of the first support body, the radially extending annular surface, and the axially extending annular portion are configured such that, when the second support body is in the working position, an annular locking groove that opens radially outward is formed. The manufacturing method includes: a flat wire setting step, in which, when the second support body is in the standby position... The process involves: setting the flat wire before bending in the setting area on the upper end surface of the first support body; moving the second support body from the standby position to the working position with the flat wire in the setting area, presenting a state where the flat wire before bending is inserted into the annular insertion groove, indicating that the bending process is ready to be completed; and an edge bending process, in which the revolving fixture is driven to revolve along the outer circumference of the first support body, and the pressing part of the revolving fixture is used to press the second short side so that the first short side is wrapped around the annular portion extending in the axial direction.

[0030] According to the manufacturing method of the edge-bent flat wire of the present invention, it is possible to efficiently manufacture edge-bent flat wire that effectively prevents or reduces defects and / or dimensional deviations.

[0031] In one embodiment, the orbital fixture comprises: a main body having an opposing portion facing the outer peripheral surface of the first support body, and a pressing portion extending upward beyond the first support body and pressing the second short side of the flat wire; and a cover portion connected to the main body portion in a manner capable of swinging about a swing axis, the cover portion being configured to, in the bending preparation state, acquire a holding position that covers at least a portion of the flat wire located radially outward from the radially extending annular surface, and a retracted position that, in plan view, does not overlap with the flat wire in the bending preparation state. In this case, the manufacturing method may include the following flat wire radial outer portion holding step: after the step of presenting the bending preparation state, moving the cover portion from the retracted position to the holding position, thereby covering at least a portion of the flat wire located radially outward from the radially extending annular surface.

[0032] In other embodiments, the radial length of the setting area is the same as the width of the flat line defined by the distance between the first short side and the second short side. The radially extending annular surface is configured such that its radially inner end is at the same radial position as the radially inner end of the setting area, and its radially outer end is at the same radial position as the radially outer end of the setting area or extends radially outward beyond the radially outer end of the setting area. The revolving clamp has an opposing portion facing the outer peripheral surface of the first support body, and a pressing portion extending from the opposing portion at a position above the first support body and pressing the second short side of the flat line. The pressing portion has a length less than the thickness of the flat line defined by the distance between the first long side and the second long side. In this case, the edge bending process is performed with the entire area of ​​the flat line in the width direction covered by the radially extending annular surface and the setting area. Attached Figure Description

[0033] Figure 1 This is a longitudinal sectional front view of the bending processing apparatus according to Embodiment 1 of the present invention, showing the state in which the first and second supports are in the working position and the orbiting fixture is in the initial position.

[0034] Figure 2 It is along Figure 1 A sectional view along line II-II in the diagram.

[0035] Figure 3 yes Figure 1 Enlarged view of Part III.

[0036] Figure 4 This is a longitudinal sectional front view of the bending processing device with the first and second supports in the standby position.

[0037] Figure 5 It is along Figure 4 A cross-sectional view of the VV line.

[0038] Figure 6 This is a longitudinal sectional side view of the bending processing device with the revolving fixture having revolved 90° around the axis of the first support body from its initial position.

[0039] Figure 7 It is along Figure 6 A sectional view of line VII-VII in the diagram.

[0040] Figure 8 This refers to the state where the orbital clamp has rotated 180° around the axis of the first support from its initial position. Figure 7 The corresponding sectional view.

[0041] Figure 9 This is a longitudinal sectional front view of the bending processing apparatus according to the first variation of Embodiment 1, showing the state in which the first and second supports are in the working position and the orbiting fixture is in the initial position.

[0042] Figure 10 This is a longitudinal sectional front view of the bending processing apparatus involved in the first modified example, showing the first and second supports in the standby position and the orbiting fixture in the initial position.

[0043] Figure 11 This is a longitudinal sectional front view of the bending processing apparatus according to the second variation of Embodiment 1, showing the state in which the first and second supports are in the working position and the orbiting fixture is in the initial position.

[0044] Figure 12 This is a longitudinal sectional front view of the bending processing apparatus involved in the second variation, showing the first and second supports in the standby position and the orbiting fixture in the initial position.

[0045] Figure 13 This is a longitudinal sectional front view of the bending processing apparatus according to Embodiment 2 of the present invention, showing the state in which the first and second supports are in the working position and the orbital fixture is in the initial position.

[0046] Figure 14 It is along Figure 13 A cross-sectional view of line XIV-XIV in the diagram.

[0047] Figure 15 yes Figure 13 Enlarged view of the XV section. Detailed Implementation

[0048] Implementation Method 1

[0049] Hereinafter, an embodiment of the bending processing apparatus of the present invention will be described with reference to the accompanying drawings.

[0050] Figure 1 A longitudinal sectional front view of the bending processing apparatus 1 according to this embodiment is shown.

[0051] in addition, Figure 2 Show along Figure 1 A sectional view along line II-II in the diagram.

[0052] and, Figure 3 Show Figure 1 Enlarged view of Part III.

[0053] The bending processing device 1 is a rectangular shape with a cross-sectional shape defined by the first short side 92a and the second short side 92b facing each other and the first long side 94a and the second long side 94b facing each other, and the width W (refer to...) Figure 2 The plate thickness T is defined by the distance between the first short side 92a and the second short side 92b, and the plate thickness T is defined by the distance between the first short side 92a and the second short side 92b. Figure 3 A device for bending a flat line 90A defined by the distance between the first long side 94a and the second long side 94b in the direction along the edge, with one of the first short side 92a and the second short side 92b (e.g., the first short side 92a) as the inner side of the bend and the other (e.g., the second short side 92b) as the outer side of the bend.

[0054] Specifically, such as Figures 1-3 As shown, the bending processing apparatus 1 includes: a first support body 10 having an upper end face 12; a second support body 20 coaxially arranged with the first support body 10 such that its lower end face 22 faces the upper end face 11 of the first support body 10; a revolving clamp 30 driven to revolve along the outer peripheral surface of a revolving clamp-side support body that is one of the first support body 10 and the second support body 20; and a receiving clamp 50A supported on a receiving clamp-side support body that is the other of the first support body 10 and the second support body 20.

[0055] The first support 10 and the second support 20 are movable relative to each other along the axial direction, so as to obtain a working position in which the upper end face 12 of the first support 10 is close to the lower end face 22 of the second support 20, and a standby position in which the upper end face 12 is separated from the lower end face 22.

[0056] In this embodiment, the first support 10 is fixed in the axial direction, and the second support 20 is movable in the vertical direction so as to obtain a lowered position that presents a working position and an uppered position that presents a standby position.

[0057] also, Figure 1 The second support 20 is shown in the lowered position.

[0058] Figure 4 The longitudinal sectional front view shows the bending processing device 1 with the second support 20 in the raised position, which presents the standby position.

[0059] in addition, Figure 5 Show along Figure 4 A cross-sectional view of the VV line.

[0060] like Figures 1-5 As shown, in this embodiment, the first support body 10 functions as the side support body of the revolution fixture, and the second support body 20 functions as the side support body of the receiving fixture.

[0061] like Figure 3 As shown, the receiving clamp 50A has: a radially extending annular surface 52, which, when the first support 10 and the second support 20 are in the working position, faces at least a portion of the end face of the orbiting clamp side support (in this embodiment, the upper end face 12 of the first support 10) at a distance equivalent to the plate thickness T of the flat line 90A defined by the distance between the first long side 94a and the second long side 94b); and an axially extending annular portion 54, which extends along the axial direction from the radially inner end of the radially extending annular surface 52 toward the end face of the orbiting clamp side support (in this embodiment, the upper end face 12 of the first support 10).

[0062] With this configuration, when the first support body 10 and the second support body 20 are in the working position, the end face of the orbiting clamp side support body (in this embodiment, the upper end face 12 of the first support body 10), the radially extending annular surface 52, and the axially extending annular portion 54 will form an annular locking groove 80 that opens radially outward (see reference). Figure 3 ).

[0063] The bending process is complete when the flat wire 90A is engaged in the annular engagement groove 80 with the first long side 94a facing the end face of the orbital clamp side support (in this embodiment, the upper end face 12 of the first support 10), the second long side 94b facing the radially extending annular surface 52, and the first short side 92a facing the outer peripheral surface of the axially extending annular portion 54. Figures 1-3 In the state shown, when the orbiting clamp 30 is driven to revolve around the axis of the orbiting clamp side support (the first support 10 in this embodiment), the orbiting clamp 30 presses down on the second short side 92b side so that the first short side 92a side wraps around the axially extending annular portion 54. As a result, the flat wire 90A is bent along the edge direction, forming an edge-bent flat wire 90B (see reference). Figure 6 and Figure 7 ).

[0064] Thus, the bending processing apparatus 1 according to this embodiment is configured such that, with the three sides (the first short side 92a, the first long side 94a, and the second long side 94b) of the rectangular cross-section shape of the flat wire 90A restricted by the outer peripheral surface of the axially extending annular portion 54, the end face of the orbital jig side support (in this embodiment, the upper end face 12 of the first support 10), and the radially extending annular surface 52, the remaining side (i.e., the second short side 92b) of the rectangular cross-section shape of the flat wire 90A is pressed in the edge direction by the orbital jig 50A, which can effectively prevent or reduce the deformation of the rectangular cross-section shape of the edge-bent flat wire 90B from the cross-section shape of the flat wire 90A before processing.

[0065] Figure 6 The image shows a longitudinal sectional side view of the orbiting clamp 30, which has rotated 90° around the axis of the orbiting clamp side support (the first support 10 in this embodiment) along its outer circumferential surface from its initial position.

[0066] Figure 7 Show along Figure 6 A sectional view of line VII-VII in the diagram.

[0067] In this embodiment, such as Figure 3 As shown, the revolution clamp 30 has an opposing portion 32 facing the outer peripheral surface of the revolution clamp side support (the first support 10 in this embodiment), and a pressing portion 33 extending outward in the axial direction from the revolution clamp side support (the first support 10 in this embodiment) and pressing the second short side 92b of the flat wire 90A. This is achieved by pressing from the initial position ( Figure 7The position of the revolution fixture 30, indicated by a double-dotted line, revolves around the axis of the revolution fixture support (in this embodiment, the first support 10) until the bending is completed. Figure 7 (The position of the orbital clamp 30 is shown in solid line in the middle), so that the pressing part 33 presses the second short side 92b of the flat wire 90A toward the first short side 92a, thereby bending the flat wire 90A in the edge direction with the first short side 92a as the inner side of the bend.

[0068] Furthermore, the revolution angle of the revolution fixture 30 from the initial position to the bending completion position is appropriately set according to the bending angle of the edge bend formed by the flat line 90A.

[0069] Figure 8 The diagram shows a cross-sectional top view of the revolution fixture 30, which has been rotated 180° about the axis of the side support of the revolution fixture (the first support 10 in this embodiment) from the initial position indicated by the double-dotted line to the completed bending position indicated by the solid line (i.e., the revolution angle is set to 180°).

[0070] like Figure 3 As shown, in this embodiment, the revolution clamp 30 includes: a main body 31 having the opposing portion 32 and the pressing portion 33; and a cover 35 connected to the main body 31 in a manner that allows it to swing about a swing axis.

[0071] The cover portion 35 is configured such that, in the bending preparation state where the flat wire 90A is inserted into the annular insertion groove 80, it can achieve a holding position that covers at least a portion of the second long side 94b of the flat wire 90A located radially outward from the radially extending annular surface 52 (see reference). Figure 1 solid lines and Figure 3 ), and the retraction position that does not overlap with the flat line 90A in the bending preparation state when viewed from above (refer to Figure 1 double-dotted lines and Figure 4 ).

[0072] With this configuration, it is possible to further and more effectively prevent or reduce deformation of the rectangular cross-section of the edge-bending flat wire 90B during edge-bending processing.

[0073] like Figure 3 As shown, in the bending processing apparatus 1, the receiving fixture 50A is supported on the receiving fixture side support (the second support 20 in this embodiment) in a manner that allows it to rotate about an axis.

[0074] With this configuration, the receiving fixture 50A rotates around the axis during edge bending by utilizing the frictional force between itself and the first edge 92a, which becomes the inner side of the bend. This prevents excessive frictional force from being applied to the first edge 92a and effectively prevents or reduces defects and / or dimensional deviations in the edge-bending flat line 90B.

[0075] In this embodiment, such as Figure 3 As shown, the receiving fixture 50A is supported on the receiving fixture side support (the second support 20 in this embodiment) in a rotatable manner via a bearing member 60 comprising an inner ring body 62, an outer ring body 64, and rolling elements 66 such as balls, rollers, and cylinders interposed between the inner ring body 62 and the outer ring body 64.

[0076] In this embodiment, the bearing member 60 is configured as a crossed roller bearing consisting of a plurality of rollers of the rolling element 66 arranged orthogonally.

[0077] In this embodiment, such as Figure 1 , Figure 3 and Figure 4 As shown, the inner ring body 62 is connected to the receiving clamp 50A, and the outer ring body 64 is connected to the receiving clamp side support (the second support body 20 in this embodiment).

[0078] Figure 9 and Figure 10 The front longitudinal section view of the bending processing apparatus 2 according to the first variation of this embodiment is shown. Figure 9 and Figure 10 The working position (the lowered position of the second support 20) and the standby position (the raised position of the second support 20) are shown respectively.

[0079] Furthermore, in the figures, components or parts that are the same as those in this embodiment are labeled with the same reference numerals.

[0080] The bending processing apparatus 2 involved in the first modified example has a receiving clamp 50B instead of the receiving clamp 50A, compared with the bending processing apparatus 1.

[0081] The receiving clamp 50B is configured to be connected to the outer ring body 64.

[0082] That is, in the first variation 2, as Figure 9 and Figure 10 As shown, the inner ring body 62 is connected to the receiving fixture side support body (the second support body 20), and the outer ring body 64 is connected to the receiving fixture 50B.

[0083] Of course, the bearing components 50A and 50B can be replaced by other rotational support mechanisms such as rollers, so that the receiving clamps 50A and 50B can be supported on the receiving clamp side support body in a manner that allows them to rotate freely about the axis.

[0084] In addition, in this embodiment and the first modified example, the receiving clamps 50A and 50B have a front end portion 56 extending from the axial direction to the front end side of the axial direction annular portion 54, and a bearing hole 13 is provided on the end face of the revolution clamp support (the upper end face 12 of the first support 10).

[0085] like Figure 1 and Figure 9 As shown, the front end portion 56 is configured to be able to rotate freely around the axis and engage with the bearing hole 13 when the first support body 10 and the second support body 20 are in the working position (when the second support body 20 is in the lowered position in this embodiment and the first variation).

[0086] With this configuration, the posture of the receiving fixtures 50A and 50B can be stabilized during edge bending processing, which can further effectively prevent or reduce the occurrence of defects and / or dimensional deviations in the edge bending flat line 90B.

[0087] The following describes a method for manufacturing an edge-bent flat wire 90B using the bending processing apparatus 1 described in this embodiment.

[0088] The manufacturing method includes a flat wire setting process, a bending preparation process, and an edge bending process.

[0089] The flat wire setting process ( Figure 4 and Figure 5 The configuration is such that, when the second support body 20 is in the raised position, the flat wire 90A is set in the setting area of ​​the upper end surface 12 of the first support body 10 (i.e., the groove predetermined area for forming the annular insertion groove 80) before bending processing.

[0090] In detail, when the flat wire 90A is in the bending preparation state after being inserted into the annular insertion groove 80, it is bent in the edge direction by the orbiting fixture 30 which is driven to revolve.

[0091] When the bending process is ready to be completed, the flat wire 90A is in a state where the first long side 94a, the second long side 94b, and the first short side 92a are respectively facing the upper end surface 12 of the first support body 10, the radially extending annular surface 52, and the axially extending annular portion 54.

[0092] That is, the flat wire setting process is configured such that, when the second support body 20 is in the rising position, the flat wire 90A is set in the setting area (the predetermined area of ​​the groove forming the annular insertion groove 80) in the upper end surface 12 of the first support body 10, with the first long side 94a connected to the area, so that as the second support body 20 moves from the rising position to the falling position, the flat wire 90A is in a state where the bending process is ready to be completed and inserted into the annular insertion groove 80.

[0093] The bending process preparation is completed in the following steps ( Figures 1-3 The configuration is such that, with the flat wire 90A provided in the predetermined area of ​​the groove, the second support body 20 is moved from the rising position to the falling position, so that the flat wire 90A is inserted into the annular insertion groove 80 before bending processing, and the bending processing preparation state is completed.

[0094] In this embodiment, the manufacturing method includes the following flat wire radial outer portion holding step: after the bending preparation step is completed, the cover portion 35 of the orbiting fixture 30 is moved from the retracted position ( Figure 1 The double-dotted line) maintains the position ( Figure 1 The solid line is moved, and the cover portion 35 covers at least a portion of the second long side 94b of the flat line 90A that is located radially outward from the radially extending annular surface 52.

[0095] The edge bending process is configured such that the revolving clamp 30 is driven around the axis of the first support 10 from an initial position ( Figure 7 The double-dotted line revolves to the desired bend completion position. Figure 7 The solid line), through the pressing part 33 of the revolution clamp 30, presses the second short side 92b in the edge direction so that the first short side 92a side wraps around the axially extending annular part 54.

[0096] Furthermore, in this embodiment and the first modified example, the first support 10 functions as the orbital clamp side support, and the second support 20 functions as the receiving clamp side support, but the present invention is not limited to such a configuration.

[0097] Figure 11 and Figure 12 The following is a longitudinal sectional front view of the bending processing apparatus 3 according to the second variation of this embodiment. Figure 11 and Figure 12 The operating position and the standby position are shown respectively.

[0098] Furthermore, in the figures, the same reference numerals are used to label the same components and parts as in this embodiment and the first modified example.

[0099] like Figure 11 and Figure 12 As shown, the bending processing apparatus 3 involved in the second modified example is configured such that the first support body 10 functions as a receiving fixture side support body supporting the receiving fixture 50, and the second support body 20 functions as a revolution fixture side support body supporting the revolution fixture 30.

[0100] Therefore, in the bending processing device 3, a bearing hole 23 is provided on the lower surface 22 of the second support 20, and the front end 56 of the receiving clamp 50A is engaged in the bearing hole 23 in a manner that allows it to rotate around the axis.

[0101] Furthermore, in the bending processing apparatus 3, the first support 10, which functions as the receiving fixture side support, is fixed in the axial direction, and the second support 20, which functions as the orbital fixture side support, is movable in the axial direction by positioning the second support 20 in a lowered position. Figure 11 ) and rising position ( Figure 12 This indicates the working position and the standby position.

[0102] Alternatively, the first support 10 can be moved in the axial direction, and the second support 20 can be fixed in the axial direction.

[0103] Implementation Method 2

[0104] Hereinafter, other embodiments of the bending processing apparatus of the present invention will be described with reference to the accompanying drawings.

[0105] Figure 13 A longitudinal sectional front view of the bending processing apparatus 4 according to this embodiment is shown.

[0106] in addition, Figure 14 Show along Figure 13 A cross-sectional view of line XIV-XIV in the diagram.

[0107] and, Figure 15 Show Figure 13 Enlarged view of the XV section.

[0108] Furthermore, in the figures, components that are the same as those in Embodiment 1 are labeled with the same reference numerals, and their detailed descriptions are omitted as appropriate.

[0109] The bending processing apparatus 4 according to this embodiment is configured to perform edge bending processing of the flat wire 90A in a state where the area where the flat wire 90A is set in the end face of the orbiting fixture side support (in this embodiment, the upper end face 12 of the first support 10) and the radially extending annular surface 52 cover the entire area of ​​the width W of the flat wire 90A.

[0110] Specifically, compared with the bending processing apparatus 1 of Embodiment 1, the bending processing apparatus 4 of this embodiment has a receiving clamp 50C instead of the receiving clamp 50A.

[0111] Similar to the bending processing apparatus 1 according to Embodiment 1, the radial length of the area in the end face of the orbital clamp side support (in this embodiment, the upper end face 12 of the first support 10) where the flat wire 90A is disposed (the groove predetermined area forming the annular insertion groove 80) is set to be the same as the width W of the flat wire 90A defined by the distance between the first short side 92a and the second short side 92b.

[0112] Similar to the receiving fixture 50A, the receiving fixture 50C has: a radially extending annular surface 52, which, when the first support 10 and the second support 20 are in the working position, extends from the end face of the orbiting fixture side support (in this embodiment, the upper end face 12 of the first support 10) at a distance equivalent to the plate thickness T of the flat wire 90A; and an axially extending annular portion 54, which extends axially from the radially inner end of the radially extending annular surface 52 toward the end face of the orbiting fixture side support (in this embodiment, the upper end face 12 of the first support 10).

[0113] The receiving clamp 50C is the same as the receiving clamp 50A in that the radially inner end of the radially extending annular surface 52 and the radially inner end of the setting area are located at the same position in the radial direction, but it differs from the receiving clamp 50A in that the radially outer end of the radially extending annular surface 52 extends radially outward than the radially outer end of the setting area.

[0114] Furthermore, the receiving clamp 50C can be deformed such that the radially extended annular surface 52 and the radially extended outer end of the setting area are located at the same position in the radial direction.

[0115] Furthermore, compared to the bending processing apparatus 1 of Embodiment 1, the bending processing apparatus 4 of this embodiment has a revolution fixture 30C instead of the revolution fixture 30.

[0116] like Figure 13 andFigure 15 As shown, the revolution clamp 30C is common to the revolution clamp 30 in that it has an opposing portion 32 facing the outer peripheral surface of the revolution clamp side support (the first support 10 in this embodiment) and a pressing portion 33 extending from the opposing portion 32 at a position outside the axial direction of the revolution clamp side support and pressing the second short side 92b side of the flat line 90A.

[0117] On the other hand, the revolution clamp 30C differs from the revolution clamp 30 in that the cover portion 35 is omitted.

[0118] like Figure 15 As shown, in the revolution clamp 30C, the pressing part 33 is configured to have a length less than the plate thickness T of the flat line 90A defined by the distance between the first long side 94a and the second long side 94b.

[0119] In the bending processing apparatus 4 configured in this way, the flat wire 90A abuts against the setting area in the end face (upper end face 12 of the first support 10 in this embodiment) of the outer surface of the rotating clamp side support in the thickness direction, and the entire width area of ​​the outer surface of the other side abuts against the radially extending annular surface 52 of the receiving clamp 50C, and is bent in the edge direction by the rotating clamp 30C.

[0120] That is, in this embodiment, the radially extending annular surface 52 does not have a radially outer edge on the outer surface of the flat line 90A. Therefore, the risk of defects being generated on the outer surface of the flat line 90A due to the outer edge can be effectively prevented.

[0121] Furthermore, in this embodiment, the pressing portion 33 of the orbiting clamp 30C is set to a length less than or equal to the plate thickness T of the flat line 90A, thereby reliably preventing the orbiting clamp 30C from colliding with the receiving clamp 50C during its orbital motion.

[0122] Preferably, the pressing portion 33 has a length that is more than 1 / 2 of the plate thickness T of the flat line 90A.

[0123] With this configuration, the pressing force of the revolution motion based on the revolution clamp 30C can be effectively applied to the flat wire 90A.

[0124] More preferably, the pressing portion 33 has a length that is more than 1 / 2 and less than 4 / 5 of the thickness of the flat line 90A.

[0125] According to this configuration, it is possible to reliably prevent the revolution clamp 30C from colliding with the receiving clamp 50C, while effectively applying the pressing force based on the revolution action of the revolution clamp 30C to the flat wire 90A.

[0126] Furthermore, the first and second variations can also be applied to the bending processing apparatus 4 according to this embodiment.

[0127] Explanation of reference numerals in the attached figures

[0128] 1~4 Bending processing device

[0129] 10 First Support Body

[0130] 12. Top surface

[0131] 13 Bearing bore

[0132] 20 Second Support

[0133] 22 Lower end face

[0134] 23 Bearing Hole

[0135] 30, 30C orbital fixture

[0136] 31 Main Body

[0137] 32 Opposite parts

[0138] 33 Pressing points

[0139] 35 Cover components

[0140] 50A, 50B, 50C receiving fixtures

[0141] 52 Radial Extended Annular Surface

[0142] 54. Circular portion extending along the axial direction

[0143] 56. Front end

[0144] 60 Bearing Components

[0145] 62 Inner ring body

[0146] 64 Outer ring body

[0147] 66 Rolling bodies

[0148] 80 Ring-shaped insert slot

[0149] 90A flat wire (before bending process)

[0150] 90B Edge-bent flat wire (after bending process)

[0151] 92a First short side

[0152] 92b Second short side

[0153] 94a First longest side

[0154] 94b Second longest side

Claims

1. A bending processing apparatus, characterized in that it bends a flat line with a rectangular cross-section defined by two opposing first short sides and two opposing long sides in the direction along the edges, and is further characterized in that... The bending processing device includes: The first support has an end face facing the axial direction; The second support has an end face facing the axial direction and is arranged coaxially with the first support; The orbiting fixture is driven to revolve along the outer peripheral surface of the orbiting fixture side support, which is one of the first support and the second support. as well as The receiving clamp is supported on a receiving clamp-side support, which is the other of the first and second support bodies. The first support and the second support are movable relative to each other along the axial direction, so as to obtain a working position in which the end faces of the first support and the second support are close to each other, and a standby position in which the end faces are separated from each other. The receiving fixture has a radially extending annular surface and an axially extending annular portion. When the first and second supports are in the working position, the radially extending annular surface faces at least a portion of the end face of the orbiting fixture-side support at a distance equivalent to the thickness of the plate defined by the flat line between the first and second long sides. The axially extending annular portion extends axially from the radially inner end of the radially extending annular surface toward the end face of the orbiting fixture-side support. The end face of the orbital clamp side support, the radially extending annular surface, and the axially extending annular portion are configured to form an annular locking groove that opens radially outward when the first support and the second support are in the working position. The orbital clamp is configured such that, when the flat wire is driven to orbit in a state where the bending process is complete (with the first long side facing the end face of the orbital clamp side support, the second long side facing the radially extending annular face, and the first short side facing the axially extending annular portion), the second short side is pressed so that the first short side wraps around the axially extending annular portion, thereby bending the flat wire in the edge direction. The receiving clamp is supported on the receiving clamp side support in a manner that allows it to rotate about an axis.

2. The bending processing apparatus according to claim 1, characterized in that, The receiving clamp has a front end portion that extends from the axial direction in an annular shape toward the front end side in the axial direction. A bearing hole is provided on the end face of the revolution fixture support. The front end is configured to engage with the bearing hole in a manner that allows it to rotate freely about the axis when the first support and the second support are in the working position.

3. The bending processing apparatus according to claim 2, characterized in that, The first support body functions as the side support body of the revolution fixture, and the second support body functions as the side support body of the receiving fixture. The second support body is movable in the vertical direction to obtain a lowered position that defines the working position and an uppered position that defines the standby position.

4. The bending processing apparatus according to claim 2, characterized in that, The first support body functions as the support body for the receiving clamp side, and the second support body functions as the support body for the orbiting clamp side. The second support body is movable in the vertical direction to obtain a lowered position that defines the working position and an uppered position that defines the standby position.

5. The bending processing apparatus according to claim 1, characterized in that, The receiving fixture is supported on the receiving fixture side support via a bearing member having an inner ring, an outer ring, and rolling elements inserted between the inner ring and the outer ring.

6. The bending processing apparatus according to claim 5, characterized in that, The bearing component is a crossed roller bearing.

7. The bending processing apparatus according to claim 5, characterized in that, The inner ring body is connected to the receiving clamp, and the outer ring body is connected to the side support of the receiving clamp.

8. The bending processing apparatus according to claim 5, characterized in that, The inner ring body is connected to the receiving clamp side support body, and the outer ring body is connected to the receiving clamp.

9. The bending processing apparatus according to any one of claims 1 to 8, characterized in that, The revolution clamp has: a main body including an opposing portion facing the outer peripheral surface of the revolution clamp side support and a pressing portion extending outward in the axial direction from the revolution clamp side support and pressing the second short side of the flat wire; and a cover portion connected to the main body in a manner that allows it to swing about a swing axis. The cover can be positioned in a holding position that covers at least a portion of the flat wire located radially outward from the radially extending annular surface, and in a retracted position that does not overlap with the flat wire in the bending preparation state when viewed from above, provided that the bending preparation is complete.

10. The bending processing apparatus according to any one of claims 1 to 8, characterized in that, The radial length of the area on the end face of the orbital clamp side support where the flat line is set is the same as the width of the flat line defined by the distance between the first short side and the second short side. The radially extending annular surface is configured such that its inner radial end is located at the same radial position as the inner radial end of the setting region, and its outer radial end is located at the same radial position as the outer radial end of the setting region or extends radially outward beyond the outer radial end of the setting region. The revolution clamp has an opposing portion facing the outer peripheral surface of the revolution clamp side support, and a pressing portion extending from the opposing portion at a position outside the axial direction of the revolution clamp side support and pressing the second short side of the flat wire. The pressing portion has a length below the thickness of the flat line defined by the distance between the first long side and the second long side.

11. The bending processing apparatus according to claim 10, characterized in that, The radially extended annular surface has its radial outer end point positioned at the same radial position as the radially outer end point of the set area.

12. The bending processing apparatus according to claim 10, characterized in that, The pressing part has a length of more than 1 / 2 the thickness of the flat line.

13. The bending processing apparatus according to claim 10, characterized in that, The pressing part has a length of more than 1 / 2 and less than 4 / 5 of the thickness of the flat line.

14. A method for manufacturing an edge-bent flat wire, comprising using a bending processing device to bend at least a portion of the flat wire in the edge direction to manufacture the edge-bent flat wire, wherein the cross-sectional shape of the flat wire is a rectangular shape defined by a first short side and a second short side facing each other and a first long side and a second long side facing each other, the bending processing device comprising: a first support body having an upper end face; a second support body having a lower end face and coaxially disposed with the first support body; a revolution clamp driven to revolve along the outer peripheral surface of the first support body; and a receiving clamp supported on the second support body, characterized in that... The second support body can move along the axial direction to achieve a working position where its lower end face is close to the upper end face of the first support body, and a standby position where its lower end face is separated from the upper end face of the first support body. The receiving clamp is supported on the second support body in a manner rotatable about an axis, and has a radially extending annular surface and an axially extending annular portion. When the second support body is in the working position, the radially extending annular surface faces at least a portion of the upper end face of the first support body at a distance equivalent to the thickness of the plate defined by the flat line between the first and second long sides. The axially extending annular portion extends axially from the radially inner end of the radially extending annular surface toward the upper end face of the first support body. The area on the upper end face of the first support body where the flat wire is disposed, the radially extending annular surface, and the axially extending annular portion are configured such that, when the second support body is in the working position, an annular locking groove that opens radially outward is formed. The manufacturing method comprises: In the flat wire setting process, while the second support body is in the standby position, the flat wire before bending processing is set in the setting area on the upper end surface of the first support body. With the flat wire provided in the designated area, the second support body is moved from the standby position to the working position, presenting a state where the flat wire is inserted into the annular insertion groove before bending processing, indicating that the bending process is ready to be completed; and In the edge bending process, the orbital clamp is driven to revolve along the outer circumferential surface of the first support body, and the pressing part of the orbital clamp is used to press the second short side so that the first short side wraps around the annular portion extending in the axial direction.

15. The method for manufacturing a flat wire with edge bending according to claim 14, characterized in that, The revolution clamp has: a main body having a facing portion facing the outer peripheral surface of the first support, and a pressing portion extending from the facing portion at a position above the first support and pressing the second short side of the flat wire; and a cover portion connected to the main body in a manner that allows it to swing about a swing axis. The cover is configured such that, in the state where the bending process preparation is completed, it can achieve a holding position that covers at least a portion of the flat wire located radially outward from the radially extending annular surface, and a retracted position that, when viewed from above, does not overlap with the flat wire in the state where the bending process preparation is completed. The manufacturing method includes the following flat wire radial outer portion holding step: after the step of presenting the bending process preparation completed state, the cover is moved from the retracted position to the holding position, and the cover is used to cover at least a portion of the flat wire located radially outer than the radially extending annular surface.

16. The method for manufacturing a flat wire with edge bending according to claim 14, characterized in that, The radial length of the set area is the same as the width of the flat line defined by the distance between the first short side and the second short side. The radially extending annular surface is configured such that its inner radial end is at the same radial position as the inner radial end of the setting area, and its outer radial end is at the same radial position as the outer radial end of the setting area or extends radially outward beyond the outer radial end of the setting area. The revolution clamp has an opposing portion facing the outer peripheral surface of the first support body, and a pressing portion extending from the opposing portion at a position above the first support body to press the second short side of the flat wire. The pressing portion has a length below the plate thickness of the flat line defined by the distance between the first long side and the second long side. The edge bending process is performed while the entire area in the width direction of the flat wire is covered by the radially extending annular surface and the setting area.

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