Flat copper wire continuous bending forming equipment and process

Abstract

The invention discloses continuous bending forming equipment for a flat copper wire. Comprising a bending assembly used for bending a linear copper wire to 180 degrees to form a U-shaped copper wire, a splitting and pulling assembly used for bending the bent position of the U-shaped copper wire, a forming assembly used for bending two pins of the copper wire in parallel and a twisting assembly used for conducting 3D twisting and bending on the parallel pins. According to the flat copper wire forming device, one or more flat copper wires can be subjected to synchronous 3D forming, the 3D forming process is divided into four stages, forming is conducted through the bending assembly, the splitting and pulling assembly, the forming assembly and the twisting assembly, meanwhile, the flat copper wires are well limited in the forming stage, and breakage during bending can be effectively prevented.

Description

Technical Field

[0001] The invention belongs to the field of stator copper wire forming, and in particular relates to a flat copper wire continuous bending forming device and process. Background Art

[0002] Flat copper wire is a copper conductor with a flat cross-section, commonly used for electrical connections and conductive applications. Compared to round copper wire, the shape of flat copper wire gives it some advantages in specific applications. Flat copper wire is made of highly conductive copper and can effectively conduct current. Due to its flat shape, it can provide a larger contact area in a limited space, which is conducive to heat dissipation. Flat copper wire is usually more flexible, easy to bend and shape, and easy to install and wire. The production of flat copper wire usually includes copper smelting, rolling, drawing and other processes to obtain the required cross-sectional shape and size.

[0003] During the forming stage of flat copper wire, a press forming machine is often used for forming. For 2D forming, it is relatively convenient and can be achieved through automation of the press forming machine (or manual operation). However, for 3D flat copper wire forming, due to the cross-sectional shape of the flat copper wire, its plastic performance during deformation may not be as good as that of the round copper wire. The flat copper wire is prone to stress concentration when bent and twisted, resulting in fracture or breakage. Therefore, complex mold design is usually required to adapt to the specific shape of the flat copper wire. The cost of making high-precision molds is high and the technical requirements are high. At the same time, due to the relatively flat shape of the flat copper wire, it is usually difficult to maintain its positioning and stability during 3D forming, and it is easy to cause displacement or deformation. Summary of the invention

[0004] In view of the above defects, the present invention provides a continuous bending and forming device for flat copper wires, comprising a bending assembly for bending a straight copper wire to 180° to form a U-shaped copper wire, a splitting and pulling assembly for bending the bending part of the U-shaped copper wire, a forming assembly for bending two pins of the copper wire in parallel, and a twisting assembly for performing 3D twisting and bending of the parallel pins;

[0005] The bending assembly comprises a fixing part for fixing the copper wire and a rotating part for rotating and bending the copper wire;

[0006] The splitting and pulling assembly includes a middle-end fixing member for fixing the copper wire and a bending transmission member for pushing both ends of the copper wire to bend;

[0007] The forming assembly comprises two parallel bending parts at different horizontal positions for synchronously rotating and bending two pins of the copper wire, and a positioning seat for limiting the end of the copper wire that does not need to be bent;

[0008] The torsion assembly includes a penetration portion for fixing and bending two pins of the copper wire respectively, and also includes a positioning portion for limiting and protecting the crown end of the copper wire.

[0009] Furthermore, the fixing portion and the rotating portion are located on the same straight line, the rotating portion is located in the middle of the copper wire, and the middle bending of the copper wire is completed by a U-shaped piece penetrated by the copper wire.

[0010] Furthermore, the fixed part is provided with a stepped support groove at the wire groove for placing the copper wire, which is used to resist and limit the non-bending end of the copper wire when the rotating part bends the copper wire;

[0011] A pressure plate I is installed on the top of the cable duct for reinforcing the limit.

[0012] Furthermore, the middle-end fixing member is used to perform subsequent offset bending on the middle part of the bent copper wire, including a limit seat fixed to the top of the large plate, a bending limit block is installed on the top of the limit seat, and the bending limit block is provided with two convex blocks on the upper left and lower right, and the contact surfaces with the copper wire are all arc surfaces;

[0013] The bending transmission part is used to bend the two end corners of the copper wire fixed by the middle end fixing part in the outward expansion direction into a V shape, including a handwheel assembly and a guide rail slide linked by a connecting rod. The guide rail slide is restricted in its movement trajectory by the arc-shaped guide rail at the bottom, and a pressure plate II for reinforcing the limit is installed on the top of the wire groove at the bending transmission part.

[0014] Furthermore, the parallel bending portion is used to synchronously bend the two pins of the copper wire in the angle direction to a parallel state, the wire groove on the top of the positioning seat is a V-shape that fits the crown end of the copper wire, and a pressure plate III for reinforcing the limit is installed at the parallel bending portion and the wire groove of the positioning seat.

[0015] Furthermore, the penetration portion includes an outer wire slot block and an inner wire slot block for inserting two pins of the copper wire, the outer wire slot block is fixedly arranged, and the inner wire slot block is hingedly arranged, and is used to rotate and bend one pin of the copper wire;

[0016] The positioning part comprises a clamping block and a limiting guide rod for limiting the crown end of the copper wire, and the limiting guide rod is inserted into the interior of the clamping block.

[0017] Furthermore, the present invention also discloses a continuous bending process for flat copper wires, including the above-mentioned continuous bending device for flat copper wires, and further comprising the following steps:

[0018] S1. Place multiple copper wires of the same length on the bending assembly, arrange the multiple copper wires in a stepped manner, and manually flip the rotating part to 180 degrees to achieve the first folding of the copper wires;

[0019] S2, placing the copper wire formed by the first folding in step S1 on the splitting and pulling assembly, with the two pins of the copper wire arranged from top to bottom, limiting the middle of the copper wire by the middle end fixing member, pushing the two bending transmission members, and bending the two pins of the copper wire in opposite directions respectively, to achieve the second bending of the copper wire;

[0020] S3, placing the second bent copper wire obtained in step 2 on the forming component, and twisting the two parallel bent parts at the same time so that the two pins are parallel to each other, thereby achieving the third bending of the copper wire;

[0021] S4, inserting the two pins of the third bent copper wire obtained in step 3 into the through-hole, fixing the positioning part at the same time, rotating the inner wire slot block, and completing the fourth bending of the copper wire.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] Single or multiple flat copper wires can be synchronously 3D formed. The 3D forming process is divided into four stages, and is formed by bending components, splitting components, forming components and torsion components respectively. At the same time, good positioning during the forming stage can effectively prevent the flat copper wire from breaking during bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the bending assembly in the present invention.

[0025] Figure 2 It is a three-dimensional diagram from another perspective of the bending assembly in the present invention.

[0026] Figure 3 It is a structural schematic diagram of the inner R limit block I and the bending block I in the present invention.

[0027] Figure 4 It is a stereoscopic view of the splitting assembly of the present invention before splitting.

[0028] Figure 5 It is a schematic diagram of the structure of the limit seat in the present invention.

[0029] Figure 6 It is an exploded schematic diagram of the limiting seat of the present invention.

[0030] Figure 7 It is a stereoscopic view of the splitting assembly of the present invention after splitting.

[0031] Figure 8 It is a schematic diagram of the local explosion of the splitting assembly of the present invention after splitting.

[0032] Fig. 9 It is a detailed schematic diagram of the bending limit block and the copper wire in the present invention.

[0033] Fig.10It is a three-dimensional diagram of the molding component before molding in the present invention.

[0034] Fig.11 It is a three-dimensional diagram of the molding component after molding in the present invention.

[0035] Fig.12 It is a three-dimensional diagram of the torsion assembly in the present invention.

[0036] Fig.13 It is a detailed schematic diagram of the through groove in the present invention.

[0037] Fig.14 This is a schematic diagram of the shape of the copper wire after being folded in half for the first time in the present invention.

[0038] Fig.15 It is a schematic diagram of the shape of the copper wire after the second splitting and drawing in the present invention.

[0039] Fig.16 This is a schematic diagram of the shape of the copper wire after the third bending in the present invention.

[0040] Fig.17 This is a schematic diagram of the shape of the fourth bend of the copper wire in the present invention.

[0041] Fig.18 It is a detailed schematic diagram of the slider seat and the guide strip in the present invention.

[0042] Fig.19 It is a schematic diagram of the clamping block in the present invention.

[0043] Fig. 20 It is a cross-sectional view of the clamping block in the present invention.

[0044] In the figure: 1. Bending assembly; 101. Bottom plate; 102. Bending support block; 103. Pressing plate I; 104. Inner R limit block I; 105. Bending block I; 106. Bending shaft seat; 107. Step support groove; 2. Splitting assembly; 201. Large plate; 202. Limit seat; 203. Bending limit block; 204. Inner R limit block II; 205. Guide rail slide; 206. Extension arm; 207. Pressing plate II; 208. Guide strip; 209. Screw support Seat; 210, screw rod; 211, slider seat; 212, connecting rod; 213, arc guide rail; 214, industrial hand wheel; 3, forming assembly; 301, mounting plate; 302, positioning seat; 303, equal height screw; 304, bending block II; 305, pressure plate III; 4, torsion assembly; 401, mounting base; 402, fixing plate; 403, outer wire trough block; 404, inner wire trough block; 405, through groove; 406, clamping block; 407, limit guide rod. DETAILED DESCRIPTION

[0045] In order to facilitate the understanding of the present invention, the device of the present invention will be described more fully below with reference to the relevant drawings. Embodiments of the device are given in the drawings. However, the device can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Example

[0048] The present embodiment provides a continuous bending and forming device for flat copper wires, comprising a bending assembly 1, a splitting and pulling assembly 2, a forming assembly 3 and a twisting assembly 4 installed on a lathe working surface (since the bending assembly 1, the splitting and pulling assembly 2, the forming assembly 3 and the twisting assembly 4 may not be located on the same lathe working surface according to actual needs, the present embodiment is described in detail in the form of drawings one by one);

[0049] Detailed, such as Figure 1-Figure 3 As shown, the bending assembly 1 includes a bottom plate 101, the fixed part and the rotating part are both installed on the top of the bottom plate 101 and are on the same straight line, the fixed part includes a bending support block 102 and an inner R limit block I104 for fixing the copper wire, and the rotating part includes a bending block I105;

[0050] Among them, a stepped support groove 107 connected to the adjacent wire groove is provided on the top of the bending support block 102, and its function is to support the end of the copper wire when the bending process is performed. A pressing plate I103 for covering the copper wire is installed on the top of the bending support block 102 to prevent the copper wire inside the wire groove from tilting during bending (the same applies to the pressing plate II207 and the pressing plate III305 described below), and a U-shaped piece is integrally formed at the top of the top of the inner R limit block I104. The bending block I105 for rotation is sleeved on the outside of the U-shaped piece, and one side of the bending block I105 is movably connected to the bending shaft seat 106 fixed on the top of the bottom plate 101 through a fixed shaft sleeve, and a handle is installed at the bending block I105;

[0051] The bending support block 102, the bending block I105 and the U-shaped member are all provided with wire grooves adapted to the copper wire;

[0052] like Figure 4-Figure 8As shown, the splitting and pulling assembly 2 includes a large plate 201, a middle-end fixing member includes a limit seat 202 fixed to the top of the large plate 201, a bending limit block 203 for limiting the bending shape of the copper wire and an inner R limit block II204 for being penetrated by the copper wire are installed on the top of the limit seat 202, and the bending transmission member includes an arc guide rail 213 fixed to both ends of the large plate 201 and a handwheel assembly;

[0053] Among them, the two arc-shaped guide rails 213 are at the same center of a circle, and the tops of the two arc-shaped guide rails 213 are movably connected with guide rail slides 205, and the tops of the two guide rail slides 205 are respectively installed with extension arms 206 corresponding to the two pins of the copper wire, and the two extension arms 206 are connected with the copper wire placed at the inner R limit block II204 through the wire groove opened at the top, and a pressure plate II207 for limiting the copper wire in the wire groove is installed through the top of the extension arm 206;

[0054] A guide bar 208 is fixed in the middle of the upper surface of the large plate 201, and screw rod supports 209 are respectively installed at both ends of the top of the guide bar 208. A screw rod 210 is movably installed between the two screw rod supports 209, and a slider seat 211 connected by a thread is sleeved on the outside of the screw rod 210. Fig.18 As shown, the bottom end of the slider seat 211 is clamped in the clamping groove opened at the top of the guide bar 208 to realize the limiting function, and the two ends of the slider seat 211 are movably connected with the two guide rail slide seats 205 through the sleeved connecting rods 212 (the two ends of the connecting rod 212 are provided with sockets, which are sleeved on the outside of the bolts fixed on the top of the slider seat 211 and the guide rail slide seat 205, and are limited by nuts);

[0055] The handwheel assembly is located on the upper surface of the large plate 201 at one end away from the limit seat 202, and is used to rotate the screw rod 210. The handwheel assembly includes a bearing seat and an industrial handwheel 214 fixed at the adjacent screw rod support 209. The end of the rotating screw rod 210 away from the limit seat 202 sequentially penetrates the slider seat 211 and the bearing seat on the same side and is connected to the industrial handwheel 214. The outer ring of the rotating screw rod 210 is connected to the bearing inside the bearing seat.

[0056] like Fig. 9 As shown, it should be noted that the contact surfaces between the bending limit block 203 and the copper wire are both arc surfaces, and the bending end of the U-shaped copper wire is bent by the upper left and lower right protrusions;

[0057] like Figure 10-11 As shown, the forming assembly 3 includes a mounting plate 301, and the parallel bending portion includes a positioning seat 302 fixed to the top of the mounting plate 301 and two bending blocks II304 for synchronous rotation;

[0058] Among them, the wire groove on the top of the positioning seat 302 is V-shaped (its angle can be set according to the angle of splitting and pulling of the copper wire, which will not be repeated here), the two bending blocks I1304 are respectively located on both sides of the positioning seat 302, and are hinged to the top of the mounting plate 301 by equal height screws 303, and the top of the bending block II304 is also provided with a wire groove for placing the copper wire, and the tops of the positioning seat 302 and the bending block II304 are both installed with a pressure plate III305 for limiting the copper wire, and the operating ends of the two bending blocks II304 are fixed with handles;

[0059] like Figure 12-13 As shown, the torsion assembly 4 includes a mounting base 401 and a fixing plate 402 fixed to the top of the mounting base 401, the through portion includes an outer wire slot block 403 and an inner wire slot block 404 for inserting two pins of the copper wire, the outer wire slot block 403 is fixed to the top of the fixing plate 402, the inner wire slot block 404 is hinged to the top of the fixing plate 402 by a spring pin, and a handle is fixed to the outer end of the inner wire slot block 404, a through slot 405 adapted to the outer wire slot block 403 and the inner wire slot block 404 is provided on the top of the fixing plate 402, the through slot 405 is in the shape of an eighth note, the note position of the eighth note corresponds to the through hole provided at the outer wire slot block 403, the note head is hollow and corresponds to the through hole provided at the inner wire slot block 404, and its function is that when a single lead of the copper wire is bent, there is enough space in the through slot 405 for the lead to deform;

[0060] The positioning part includes a clamping block 406 and a limiting guide rod 407 for limiting the crown end of the copper wire (i.e., the bending part of the forming component 3). The limiting guide rod 407 is inserted into the inside of the clamping block 406 to support the crown end of the copper wire. Figure 19-20 As shown, the inner wall of the clamping block 406 is provided with an arc surface that fits with the crown end of the copper wire.

[0061] The forming process based on the above-mentioned flat copper wire continuous bending forming equipment is as follows:

[0062] S1, first folding and forming:

[0063] One or more copper wires of the same length are placed in the wire grooves of the bending support block 102 and the bending block I 105 (the copper wire passes through the wire groove of the inner R limit block I104), and are limited by the pressing plate I103. Then, by turning the handle, the bending block I105 drives the internal copper wire to bend with the U-shaped piece as the fulcrum, completing the one-step forming of the copper wire;

[0064] The shape of the copper wire after folding is as follows Fig.14 As shown;

[0065] S2, Second splitting forming:

[0066] Arrange the two pins of the copper wire that has been formed once in step S1 from top to bottom, place the bent end of the once-formed copper wire at the bending limit block 203, and the pin at the bottom passes through the inner R limit block II204. The two pins of the once-formed copper wire are respectively placed in the wire grooves at the two arm spans 206, and are limited by the pressing plate II207. Then, the screw rod 210 is driven to rotate by the forward industrial hand wheel, so that the slider seat 211 moves toward the side close to the limit seat 202, and the two arm spans 206 are driven by the hinged connecting rod 212 to pull the two pins of the copper wire in the opposite direction to a certain angle (move away from each other), and the angle is between 90° and 150°, so as to realize the second splitting and pulling forming of the copper wire;

[0067] The shape of the copper wire after splitting and bending is as follows Fig.15 As shown;

[0068] S3, the third bend:

[0069] The bent end of the second splitting and drawing copper wire obtained in step S2 is placed in the wire groove on the top of the positioning seat 302, and the two pins of the copper wire are respectively placed in the wire grooves of the two bending blocks II304, and then the two handles are pushed synchronously to drive the hinged bending blocks II304 to rotate, so as to achieve the bending of the two pins of the copper wire (in a parallel state after bending), thereby obtaining a copper wire with a "crown" shape;

[0070] The copper wire bent for the third time is Fig.16 As shown;

[0071] S4, the fourth bend:

[0072] Insert the two pins of the copper wire obtained by the third bend in step S3 into the through holes inside the outer wire slot block 403 and the inner wire slot block 404 respectively, and pass through the through slot 405. Then, rotate the hinged inner wire slot block 404 by the handle, and use the clamp block 406 to fix the crown end of the copper wire. At the same time, the limiting guide rod 407 is placed at the bottom of the copper wire crown. Through the limiting of the through hole of the inner wire slot block 404, the copper wire is twisted at a certain angle of 30-60 degrees to obtain the fourth bend of the copper wire.

[0073] The copper wire after the fourth bend is as follows Fig.17 shown.

[0074] It should be noted that the structure described in the present invention can be implemented in a variety of different forms and is not limited to the described embodiments. Any equivalent transformations made by ordinary technicians in this field using the contents of the present invention description and drawings, or directly or indirectly applied to other related technical fields, such as the loading and unloading of other items, are included in the protection scope of the present invention.

Claims

1. A flat copper wire continuous bending and forming device, characterized in that: It includes a bending assembly for bending a straight copper wire to 180 degrees to form a U-shaped copper wire, a splitting assembly for bending the bending part of the U-shaped copper wire, a forming assembly for bending two pins of the copper wire in parallel, and a twisting assembly for performing 3D twisting bending on the parallel pins; The bending assembly comprises a fixing part for fixing the copper wire and a rotating part for rotating and bending the copper wire; The splitting and pulling assembly includes a middle-end fixing member for fixing the copper wire and a bending transmission member for pushing both ends of the copper wire to bend; The forming assembly comprises two parallel bending parts at different horizontal positions for synchronously rotating and bending two pins of the copper wire, and a positioning seat for limiting the end of the copper wire that does not need to be bent; The torsion assembly includes a penetration portion for fixing and bending two pins of the copper wire respectively, and also includes a positioning portion for limiting and protecting the crown end of the copper wire.

2. The continuous bending and forming equipment for flat copper wire according to claim 1, characterized in that: The fixing part and the rotating part are located on the same straight line, the rotating part is located in the middle of the copper wire, and the middle bending of the copper wire is completed by a U-shaped piece penetrated by the copper wire.

3. The continuous bending and forming equipment for flat copper wire according to claim 2, characterized in that: The fixed part is provided with a stepped support groove at the wire groove for placing the copper wire, which is used to resist and limit the non-bending end of the copper wire when the rotating part bends the copper wire; A pressure plate I is installed on the top of the cable duct for reinforcing the limit.

4. The continuous bending and forming equipment for flat copper wire according to claim 1, characterized in that: The middle-end fixing member is used to perform subsequent offset bending on the middle part of the bent copper wire, and includes a limit seat fixed to the top of the large plate, a bending limit block is installed on the top of the limit seat, and the bending limit block is provided with two convex blocks on the upper left and lower right, and the contact surfaces with the copper wire are all arc surfaces; The bending transmission part is used to bend the two end corners of the copper wire fixed by the middle end fixing part in the outward expansion direction into a V shape, including a handwheel assembly and a guide rail slide linked by a connecting rod. The guide rail slide is restricted in its movement trajectory by the arc-shaped guide rail at the bottom, and a pressure plate II for reinforcing the limit is installed on the top of the wire groove at the bending transmission part.

5. The continuous bending and forming equipment for flat copper wire according to claim 1, characterized in that: The parallel bending portion is used to synchronously bend the two pins of the copper wire in the angle direction to a parallel state. The wire groove on the top of the positioning seat is a V-shape that fits the crown end of the copper wire, and a pressure plate III for reinforcing the limit is installed at the parallel bending portion and the wire groove of the positioning seat.

6. The continuous bending and forming equipment for flat copper wire according to claim 1, characterized in that: The penetration portion includes an outer wire slot block and an inner wire slot block for inserting two pins of the copper wire, the outer wire slot block is fixedly arranged, and the inner wire slot block is hingedly arranged, and is used to rotate and bend one pin of the copper wire; The positioning part comprises a clamping block and a limiting guide rod for limiting the crown end of the copper wire, and the limiting guide rod is inserted into the interior of the clamping block.

7. A continuous bending process for flat copper wire, comprising the continuous bending device for flat copper wire according to any one of claims 1 to 6, characterized in that: The following steps are also included: S1. Place multiple copper wires of the same length on the bending assembly, arrange the multiple copper wires in a stepped manner, and manually flip the rotating part to 180 degrees to achieve the first folding of the copper wires; S2, placing the copper wire formed by the first folding in step S1 on the splitting and pulling assembly, with the two pins of the copper wire arranged from top to bottom, limiting the middle of the copper wire by the middle-end fixing member, pushing the bending transmission members at both ends, and bending the two pins of the copper wire in opposite directions respectively, to achieve the second bending of the copper wire; S3, placing the second-bent copper wire obtained in step 2 on the forming component, and twisting the two parallel bending parts at the same time so that the two pins are parallel to each other, thereby achieving the third bending of the copper wire; S4, inserting the two pins of the third bent copper wire obtained in step 3 into the through-hole, fixing the positioning part at the same time, rotating the inner wire slot block, and completing the fourth bending of the copper wire.

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