Apparatus and method for forming conductor wires

Abstract

To provide a molding device of a conductor wire, which is capable of molding a conductor wire in a plurality of molding shapes, with no replacement of a die and a punch.SOLUTION: One side and the other side of a conductor wire 100 are defined as A side and B side, respectively. A terminal die 40 that is immobilized on the A side of the conductor wire 100 comprises a first stationary part 410 serving as a die element corresponding to a first target section T1. A first punch 50 provided so as to be movable forward / backward on the B side of the conductor wire 100 comprises a forwarding part 510 serving as a punch element corresponding to the first target section T1, and a second stationary part 520 serving as a die element corresponding to a second target section T2. A second punch 60 provided so as to be movable forward / backward on the A side of the conductor wire 100 comprises a second forwarding part 620 serving as a punch element corresponding to the second target section T2. A molding device 80 can mold the conductor wire 100 into at least one of 1-type molding shape, 2-type molding shape and 3-type molding shape.SELECTED DRAWING: Figure 2

Description

【Technical Field】 【0001】 The present invention relates to a forming device and a forming method for a conductor wire. 【Background Art】 【0002】 Conventionally, a forming device for forming a conductor wire used in a rotating electrical machine (i.e., a motor or a generator) into a predetermined shape is known. For example, the forming device for a conductor wire disclosed in Patent Document 1 includes a die having a forming surface for forming a bent portion in the conductor wire, a punch for pressing the conductor wire against the die to form the bent portion, and a gripping portion for gripping the conductor wire. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent No. 7151645 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 Recently, rotating electrical machines are required to be miniaturized and have high output, and measures have been taken by forming conductor wires into various shapes and combining them. In the conventional technology of Patent Document 1, in order to cope with a plurality of forming shapes, dies and punches for each forming shape are prepared, and the dies and punches are exchanged every time the forming shape is switched. 【0005】 In that case, the time for exchanging the dies and punches is wasted and the production efficiency is reduced. In addition, it is necessary to secure a place for storing the exchanged dies and punches, and the space efficiency is also reduced. Furthermore, a confirmation mechanism for checking whether the shape to be formed matches the dies and punches attached to the device is required. Also, when trying to design the equipment to perform forming processes according to each forming shape, there is a problem that the cost of the equipment increases and the equipment area becomes large. 【0006】 This invention was created in view of the above points, and its purpose is to provide a conductor wire forming apparatus and forming method that can form a conductor wire into multiple molded shapes without changing the die and punch. [Means for solving the problem] 【0007】 The conductor wire forming apparatus according to the present invention is an apparatus that forms a conductor wire (100) extending from the rear, which is the source, to the front, which is the destination, into a predetermined shape by sandwiching either a predetermined first target section (T1) or a second target section (T2) adjacent to the front of the first target section between a stationary die element and a moving punch element. 【0008】 In the operating plane including the conductor wire, one side of the conductor wire is defined as side A, and the other side as side B. The conductor wire forming apparatus comprises a conductor wire gripping unit (30), a terminal die (40), a first punch (50), a second punch (60), a first punch drive unit (75), and a second punch drive unit (76). 【0009】 The conductor wire gripping section grips the conductor wire before molding, which is supplied from the supplier. The end die has a first stationary section (410) that rests on side A of the conductor wire and functions as a die element corresponding to the first target section. 【0010】 The first punch is provided on the B side of the conductor wire so as to be able to advance in a direction approaching the conductor wire and retract in a direction away from the conductor wire, and has a first forward portion (510) that functions as a punch element corresponding to the first target section, and a second stationary portion (520) that functions as a die element corresponding to the second target section. 【0011】 The second punch is provided in front of the terminal die and on the A side of the conductor wire, and is capable of advancing in a direction approaching the conductor wire and retracting in a direction away from the conductor wire, and has a second forward portion (620) that functions as a punch element corresponding to the second target section. The first punch drive unit moves the first punch forward and backward in the operating plane. The second punch drive unit moves the second punch forward and backward in the operating plane. 【0012】 The shape of a conductor wire formed in the first target section but not in the second target section is defined as the "Type 1 molded shape". The shape of a conductor wire that is not formed in the first target section but is formed in the second target section is defined as the "Type 2 molded shape". The shape of a conductor wire formed in both the first and second target sections is defined as the "Type 3 molded shape". This conductor wire forming apparatus is capable of forming conductor wires into Type 1 molded shapes and at least one of Type 2 molded shapes or Type 3 molded shapes. 【0013】 The paths of the first and second punches are inclined forward at an angle of inclination (θ1, θ2) greater than 0° and less than 90° with respect to a virtual orthogonal line (Y) perpendicular to the direction of extension of the conductor wire on the operating plane. Depending on the selection of the two-type molding shape and the three-type molding shape, a fine adjustment mechanism (57, 67) is provided that allows for fine adjustment of the position of the second stationary part of the first punch and the position of the second forward part of the second punch. 【0014】 In the wire forming apparatus of the present invention, the first punch combines a part that functions as a punch element and a part that functions as a die element. As a result, the wire can be formed into at least two patterns of molded shapes, such as a type 1 molded shape and a type 2 molded shape, or a type 1 molded shape and a type 3 molded shape, without changing the die and punch. 【0015】 The method for forming a conductor wire according to the present invention is a method for forming a conductor wire into a predetermined shape using the above-described conductor wire forming apparatus, and includes a forming shape selection step (S0) and one of a type 1 forming step (S1), a type 2 forming step (S2), or a type 3 forming step (S3). In the forming shape selection step, the forming shape of the conductor wire is selected from type 1 forming shapes, type 2 forming shapes, and type 3 forming shapes. Depending on the selected forming shape, one of the following is performed: a type 1 forming step in which the conductor wire is formed into a type 1 forming shape, a type 2 forming step in which the conductor wire is formed into a type 2 forming shape, or a type 3 forming step in which the conductor wire is formed into a type 3 forming shape. 【0016】 The first die forming step includes a first punch advancing forming step (S11). In the first punch advancing forming step, the first advancing portion of the first punch advances toward the first stationary portion of the end die, and a conductor wire is sandwiched between the first advancing portion and the first stationary portion to form the first die forming shape. The two-die molding step includes a first punch advancement stop step (S21) and a second punch advancement molding step (S22). In the first punch advancement stop step, the first advance portion of the first punch advances toward the first stationary portion of the end die and stops at a position where the end face of the first advance portion contacts the conductor wire, or just before contact. In the second punch advancement molding step, the second advance portion of the second punch advances toward the second stationary portion of the stopped first punch and forms the two-die molding shape with the conductor wire sandwiched between the second advance portion and the second stationary portion. 【0017】 The three-type molding step includes a first punch advance molding stop step (S31) and a second punch advance molding step (S32). In the first punch advance molding stop step, the first advance portion of the first punch advances toward the first stationary portion of the end die, and after forming a one-type molding shape with a conductor wire sandwiched between the first advance portion and the first stationary portion, it stops at that position. In the second punch advance molding step, the second advance portion of the second punch advances toward the second stationary portion of the stopped first punch, and after forming a three-type molding shape with a conductor wire sandwiched between the second advance portion and the second stationary portion. 【0018】 This method for forming a conductor wire further includes, if a Type 2 or Type 3 forming shape is selected in the forming shape selection step, a fine adjustment step (S023) before the Type 2 or Type 3 forming step in which the position of the second stationary part of the first punch and the position of the second advancing part of the second punch are finely adjusted according to the selected forming shape. 【0019】 In the method for forming a conductor wire according to the present invention, in the second punch forward forming step (S22) of the type 2 forming step and the second punch forward forming step (S32) of the type 3 forming step, the second stationary part of the first punch functions as a die element, whereby the same operational effects as those of the above-described conductor wire forming apparatus can be obtained. This method for forming a conductor wire is synonymous with the "method for manufacturing a formed conductor wire", and acts such as using and transferring the formed conductor wire are included in the implementation of the invention. 【Brief Description of the Drawings】 【0020】 [Figure 1] A plan view showing a schematic configuration of a conductor wire forming apparatus according to an embodiment. [Figure 2] An enlarged view of FIG. 1. [Figure 3] A sectional view taken along line III-III of FIG. 2. [Figure 4] A diagram showing the type 1, type 2, and type 3 forming shapes of an example. [Figure 5] A schematic diagram for explaining the forming steps (a) and (b) of the type 1 forming shape. [Figure 6] A schematic diagram for explaining the forming steps (a), (b), and (c) of the type 2 forming shape. [Figure 7] A schematic diagram for explaining the forming steps (a), (b), and (c) of the type 3 forming shape. [Figure 8] A flowchart of a method for forming a conductor wire according to an embodiment. [Figure 9] A diagram showing the type 1, type 2, and type 3 forming shapes of another example. [Figure 10] A diagram showing the forming of the type 3 forming shape of FIG. 9. [Figure 11] A schematic configuration diagram of a conductor wire forming apparatus having three or more punches according to another embodiment. 【Modes for Carrying Out the Invention】 【0021】 An apparatus and method for forming a conductor wire according to one embodiment of the present invention will be described with reference to the drawings. This apparatus and method are used to form conductor wires used as SC-wound segment conductors in the stator of a rotating electric machine (motor or generator). In multiple embodiments, including other embodiments, substantially identical components are denoted by the same reference numerals and their descriptions are omitted. 【0022】 Referring to Figures 1 to 3, the schematic configuration of a conductor wire forming apparatus 80 according to one embodiment will be described. Figures 1 and 2 are plan views seen from above. In Figures 1 and 2, the source of the conductor wire 100 (right side of the figure) is referred to as the "rear," and the destination (left side of the figure) is referred to as the "front." In Figure 3, the plane containing the conductor wire 100 is referred to as the "operating plane." The forming apparatus 80 forms a predetermined section of the conductor wire 100, which extends from the rear to the front, by sandwiching it between a die element stationary on the operating plane and a punch element that moves, thereby forming it into a predetermined shape. Here, the terms "die element" and "punch element" are used conceptually to encompass the functional parts that perform the forming, and do not refer to specific components. 【0023】 For the sake of explanation, in the operating plane, one side of the conductor wire 100 is defined as "side A" and the other side as "side B". In the examples in Figures 1 to 3, when viewed from the rear, the right side of the conductor wire 100 is defined as side A, and the left side of the conductor wire 100 is defined as side B. It can be easily inferred that the configurations in Figures 1 to 3 may be reversed left to right with respect to the conductor wire 100. 【0024】 Figure 4 shows one embodiment of the molded shape of the conductor wire 100 formed by the molding apparatus 80. A predetermined section of the conductor wire 100 is designated as the first target section T1, and the section adjacent to the front of the first target section T1 is designated as the second target section T2. ​​The molding apparatus 80 forms either the first target section T1 or the second target section T2, or both, of the conductor wire 100. 【0025】 The shape of a conductor wire formed in the first target section T1 but not in the second target section T2 is defined as "Type 1 molded shape". The shape of a conductor wire that is not formed in the first target section T1 but is formed in the second target section T2 is defined as "Type 2 molded shape". The shape of a conductor wire that is formed in both the first target section T1 and the second target section T2 is defined as "Type 3 molded shape". The conductor wires formed into Type 1, Type 2, and Type 3 molded shapes are assigned the designations "101", "102", and "103", respectively. 【0026】 In this embodiment, crank bending is performed. In the first molded shape, a first curved portion 91 with an offset amount H1 that cranks toward A is formed at the rear end of the first target section T1. In the second molded shape, a second curved portion 92 with an offset amount H2 that cranks toward B is formed at the rear end of the second target section T2. ​​In the third molded shape, a first curved portion 91 is formed at the rear end of the first target section T1, and a second curved portion 92 is formed at the rear end of the second target section T2. ​​In this embodiment, the offset amounts H1 and H2 are set to be the same, and the first curved portion 91 and the second curved portion 92 have almost symmetrical shapes. 【0027】 For example, the conductor wire 103 with a type 3 molded shape is used in the U-turn portion of the coil inserted into the stator slot in the SC winding of a three-phase motor. The conductor wires 101 and 102 with type 1 and type 2 molded shapes are used in the connecting portions at the beginning and end of the winding in each phase slot. In this embodiment, since the conductor wires after the molding process are sent to the next process in the same orientation, it is necessary to mold type 1 and type 2 shapes separately. However, when used as a dedicated machine for the molding process only, it is not always necessary to distinguish between type 1 and type 2 molded shapes. 【0028】 In conventional technology, when switching between multiple molding shapes, a die and punch were prepared for each molding shape, and the die and punch had to be replaced each time the molding shape was changed. However, this had problems such as reduced production efficiency and space efficiency, and the need for a verification mechanism. Therefore, the molding apparatus 80 of this embodiment aims to enable the molding of conductor wires into multiple molding shapes without changing the die and punch. Specifically, it enables the selective molding of the conductor wire 100 into three patterns: type 1, type 2, and type 3 molding shapes shown in Figure 4. 【0029】 As shown in Figure 1, the molding apparatus 80 comprises a conductor wire gripping section 30, three components: a terminal die 40, a first punch 50, and a second punch 60, and a first punch drive unit 75 and a second punch drive unit 76. The conductor wire gripping section 30 grips the conductor wire 100 before molding, which is supplied from the supplier. The terminal die 40 is stationary on side A of the conductor wire 100. 【0030】 For example, the conductor wire gripping section 30 includes a pressing actuator 33 that outputs a pressing force from side A to side B, and a pressure-receiving wall 43 provided on the B side of the conductor wire 100 at the rear of the end die 40. As shown in Figure 3, the end die 40 has a accommodating groove 44 formed in front of the pressure-receiving wall 43, with the inner wall on side B being continuous. The conductor wire 100 is gripped when the pressing actuator 33 presses the conductor wire 100 against the pressure-receiving wall 43 via a spring 34. A clearance is provided between the conductor wire 100 and the A side of the accommodating groove 44, allowing the conductor wire 100 to move in the stretching direction. 【0031】 The first punch 50 is provided on the B side of the conductor wire 100 so as to be able to move forward and backward. The second punch 60 is provided in front of the end die 40 and on the A side of the conductor wire 100 so as to be able to move forward and backward. For the first punch 50 and the second punch 60, "forward" means moving in a direction toward the conductor wire 100, and "backward" means moving in a direction toward away from the conductor wire 100. It should be noted that the "forward" and "backward" directions in the direction of extension of the conductor wire 100 are different from the "forward" and "backward" directions of the first punch 50 and the second punch 60. 【0032】 The first punch drive unit 75 moves the first punch 50 forward and backward in the operating plane. The second punch drive unit 76 moves the second punch 60 forward and backward in the operating plane. In this embodiment, the paths of the first punch 50 and the second punch 60 are inclined forward with inclination angles θ1 and θ2 greater than 0° and less than 90° with respect to a virtual orthogonal line Y that is perpendicular to the extension direction of the conductor wire in the operating plane. In the illustrated example, the inclination angle θ1 of the path of the first punch 50 and the inclination angle θ2 of the path of the second punch 60 are both set to approximately 30°. 【0033】 The first punch drive unit 75 and the second punch drive unit 76 are composed of, for example, a servo motor 77 and a ball screw 78, and the end face positions of the punches 50 and 60 can be precisely adjusted by controlling the rotation angle of the servo motor 77. In the illustrated example, the first punch drive unit 75 is configured to move the first punch 50 forward in the direction of the advance of the ball screw 78, and the second punch drive unit 76 is configured to move the second punch 60 forward in the direction of the return of the ball screw 78, but such drive directions may be set as appropriate. 【0034】 The detailed configurations of the end die 40, the first punch 50, and the second punch 60 will be described, mainly with reference to Figure 2. The end die 40 has a first stationary portion 410 that functions as a "die element corresponding to the first target section T1". In this embodiment, the portion of the end die 40 that protrudes toward side A of the conductor wire 100 in front of the pressure-receiving wall 43 forms the first stationary portion 410. The first stationary portion 410 has a first curved pressure-receiving portion 41d corresponding to the shape of the first curved portion 91. 【0035】 The first punch 50 has a first forward portion 510 on its rear side that functions as a punch element corresponding to the first target section T1, and a second stationary portion 520 (shown by a dashed line) on its front side that functions as a die element corresponding to the second target section T2. ​​In other words, the first punch 50 combines a portion that functions as a punch element and a portion that functions as a die element. The first forward portion 510 has a first curved portion pressurizing portion 51p at its rear end that corresponds to the shape of the first curved portion 91. The second stationary portion 520 has a second curved portion pressure receiving portion 52d that corresponds to the shape of the second curved portion 92. 【0036】 The second punch 60 has a second forward portion 620 that functions as a "punch element corresponding to the second target section T2". The second forward portion 620 has a second curved portion pressurizing portion 62p at its rear end that corresponds to the shape of the second curved portion 92. 【0037】 The first punch 50 is provided with a fine adjustment mechanism 57 that can finely adjust the position X2d of the second curved pressure receiving portion 52d in the second stationary portion 520. For example, the fine adjustment mechanism 57 consists of an adjuster bolt 58 whose tip position can be adjusted and an auxiliary plate 59 having an elongated hole in the direction of extension of the conductor wire 100. By fastening the bolt to the main plate 53 through the elongated hole with the side surface of the auxiliary plate 59 abutting against the tip of the adjuster bolt 58, the position X2d of the second curved pressure receiving portion 52d in the second stationary portion 520 is finely adjusted. 【0038】 The second punch 60 is provided with a fine adjustment mechanism 67 that allows for fine adjustment of the position X2p of the second curved pressure portion 62p in the second forward portion 620. Similar to the first punch 50, the fine adjustment mechanism 67 consists of an adjuster bolt 68 and an auxiliary plate 69. By fastening the bolt to the main plate 63 through an elongated hole with the side surface of the auxiliary plate 69 abutting against the tip of the adjuster bolt 68, the position X2p of the second curved pressure portion 62p in the second forward portion 620 is finely adjusted. 【0039】 Next, referring to the schematic diagrams in Figures 5 to 7 and the flowchart in Figure 8, the molding steps for each of the molded shapes, Type 1, Type 2, and Type 3, will be explained. This explanation describes the operation of the conductor wire molding apparatus 80 and the method of molding the conductor wire. In the flowchart explanation, the symbol "S" represents a step. 【0040】 Figures 5 to 7 schematically show only the portions of the terminal die 40, the first punch 50, and the second punch 60 near the conductor wire 100. Furthermore, the illustration of the fine adjustment mechanisms 57 and 67 is omitted, and only the position X2d of the second curved pressure receiving portion 52d in the second stationary portion 520 of the first punch 50, and the position X2p of the second curved pressurizing portion 62p in the second forward portion 620 of the second punch 60 are schematically shown. 【0041】 In the molding shape selection step S0, the molding shape of the conductor wire 100 is selected from Type 1 molding shape, Type 2 molding shape, and Type 3 molding shape. Depending on the selected molding shape, one of the following is executed: Type 1 molding step S1, which molds the conductor wire 100 into Type 1 molding shape; Type 2 molding step S2, which molds the conductor wire 100 into Type 2 molding shape; or Type 3 molding step S3, which molds the conductor wire 100 into Type 3 molding shape. Figures 5(a), 6(a), and 7(a) show the preparation state after the molding shape is selected in S0 and before molding begins. 【0042】 If a Type 2 or Type 3 molding shape is selected, in S023, the position of the second stationary part 520 of the first punch 50 and the position of the second forward part 620 of the second punch 60 are finely adjusted by the fine adjustment mechanisms 57 and 67. 【0043】 As shown in Figure 6(a), when the two-type molding shape is selected, the position X2p of the second curved pressurizing portion 62p in the second forward portion 620 is shifted forward compared to the case of the three-type molding shape. This amount of shift is expressed as "H2sinθ2" using the inclination angle θ2 of the path of the second punch 60 and the offset amount H2 of the second curved portion 92 (see Figure 6(c)). 【0044】 As shown in Figure 7(a), when the type 3 molding shape is selected, the position X2d of the second curved pressure receiving portion 52d in the second stationary portion 520 is shifted forward compared to the case of the type 2 molding shape. This amount of shift is expressed as "H1sinθ1" using the inclination angle θ1 of the path of the first punch 50 and the offset amount H1 of the first curved portion 91 (see Figure 7(b)). 【0045】 The die-forming step S1 includes the first punch advancing forming step S11. As shown in Figure 5(b), in S11, the first advancing portion 510 of the first punch 50 advances toward the first stationary portion 410 of the end die 40. The conductor wire 100 is sandwiched between the first curved portion pressurizing portion 51p of the first advancing portion 510 and the first curved portion pressure receiving portion 41d of the first stationary portion 410 to form the first curved portion 91, thereby forming the conductor wire 101 into a die-forming shape. The second punch 60 is not used in S1. 【0046】 If the inclination angle θ1 of the path of the first punch 50 is set to 0, the first curved portion 91 and the portion parallel to the stretching direction other than the first curved portion 91 will be pressed simultaneously, and there is a risk that shear stress will be applied to the first curved portion 91. Therefore, by setting the inclination angle θ1 of the path of the first punch 50 to an appropriate value, the application of shear stress to the first curved portion 91 is prevented, and good molding quality can be obtained. 【0047】 The two-die forming step S2 includes a first punch advance stop step S21 and a second punch advance forming step S22. As shown in Figure 6(b), in S21, the first advance portion 510 of the first punch 50 advances toward the first stationary portion 410 of the end die 40 and stops at a position where the end face of the first advance portion 510 contacts the conductor wire 100, or just before (preferably just before) contact. 【0048】 As shown in Figure 6(c), in S22, the second forward portion 620 of the second punch 60 moves forward toward the second stationary portion 520 of the stopped first punch 50. The conductor wire 100 is sandwiched between the second curved portion pressing portion 62p of the second forward portion 620 and the second curved portion pressure receiving portion 52d of the second stationary portion 520 to form the second curved portion 92, thereby forming the conductor wire 102 into a two-type molded shape. Similarly, by setting the inclination angle θ2 of the path of the second punch 60 to an appropriate value, shear stress is prevented from being applied to the second curved portion 92, and good molding quality is obtained. 【0049】 The third-type molding step S3 includes a first punch advance molding stop step S31 and a second punch advance molding step S32. As shown in Figure 7(b), in S31, the first advance portion 510 of the first punch 50 advances toward the first stationary portion 410 of the end die 40. The conductor wire 100 is sandwiched between the first curved portion pressurizing portion 51p of the first advance portion 510 and the first curved portion pressure receiving portion 41d of the first stationary portion 410 to form a first curved portion 91, and after being molded into a first-type molded conductor wire 101, it stops at that position. 【0050】 As shown in Figure 7(c), in S32, the second forward portion 620 of the second punch 60 moves forward toward the second stationary portion 520 of the stopped first punch 50. A conductor wire 101 with a single molded shape is sandwiched between the second curved portion pressurizing portion 62p of the second forward portion 620 and the second curved portion pressure receiving portion 52d of the second stationary portion 520 to form a second curved portion 92, thereby forming a conductor wire 103 with a three-formed shape. 【0051】 After S1, S2, or S3 is performed and the conductor wire 100 is formed into one of the type 1, type 2, or type 3 molded shapes, in S4 each punch 50, 60 retracts to its original position. 【0052】 In the conductor wire forming apparatus 80 of this embodiment, the first punch 50 combines a part that functions as a punch element and a part that functions as a die element. In the conductor wire forming method, in the second punch advancing forming step S22 of the type 2 forming step S2, and the second punch advancing forming step S32 of the type 3 forming step S3, the second stationary part 520 of the first punch 50 functions as a die element. As a result, in this embodiment, the conductor wire 100 can be formed into multiple molded shapes without changing the die and punch. 【0053】 In this embodiment, the inclination angle θ1 of the path of the first punch 50 and the inclination angle θ2 of the path of the second punch 60 are greater than 0° and less than 90°. Based on this, fine adjustment mechanisms 57 and 67 are provided that allow for fine adjustment of the position of the second stationary part 520 of the first punch 50 and the position of the second forward part 620 of the second punch 60. By appropriately fine-tuning the fine adjustment mechanisms 57 and 67 according to the selection of the type 2 molding shape and the type 3 molding shape, the conductor wire 100 can be molded into three patterns of molding shapes: type 1, type 2, and type 3. 【0054】 (Other embodiments) [a] The molding apparatus 80 of the above embodiment is equipped with fine adjustment mechanisms 57 and 67 on the first punch 50 and the second punch 60, enabling the molding of both type 2 and type 3 molded shapes. Alternatively, the dimensions of the first punch 50 and the second punch 60 may be determined to match either the type 2 molded shape or the type 3 molded shape, without providing the fine adjustment mechanisms. In that case, the molding apparatus 80 can mold the conductor wire into a type 1 molded shape and either the type 2 molded shape or the type 3 molded shape. Compared to the prior art, this provides the same advantages as the above embodiment in that it is possible to mold the conductor wire into two patterns of molded shapes without changing the die and punches. 【0055】 [b] The configuration of the conductor wire gripping portion 30 is not limited to the above embodiment; a conductor wire gripping portion having a clamping function on its own may grip the conductor wire 100 before molding. In that case, it is not necessary for the end die 40 to have a pressure-receiving wall 43, and the end die 40 only needs to have the function of at least the first stationary portion 410. 【0056】 [c] The punch drive units 75 and 76 are not limited to those including a servo motor 77 and a ball screw 78, but may be composed of actuators such as cylinders. Furthermore, in the invention of the "method for forming a conductor wire", it is not essential that a single forming apparatus has the conductor wire gripping unit 30 and the punch drive units 75 and 76 inside, and the first punch 50 and the second punch 60 may be configured to perform predetermined operations by external input. 【0057】 [d] Side A and side B can be interchanged at will. That is, when viewed from the rear, the left side of the conductor wire 100 may be defined as side A, and the right side of the conductor wire 100 may be defined as side B. 【0058】 [e] Figure 9 shows Type 1, Type 2, and Type 3 molding shapes of an embodiment different from the crank bending embodiment shown in Figure 4. The conductor wire 101v of the Type 1 molding shape is inclined over the entire area of ​​the first target section T1, and the conductor wire 102v of the Type 2 molding shape is inclined over the entire area of ​​the second target section T2. ​​The conductor wire 103v of the Type 3 molding shape has a flattened V shape. 【0059】 Figure 10 shows the molding of the type 3 molding shape of Figure 9. Figure 10 corresponds to Figure 7(c) of the above embodiment. The first stationary part 410 of the end die 40, the first forward part 510 and the second stationary part 520 of the first punch 50, and the second forward part 620 of the second punch 60 all have inclined surfaces with a constant gradient. In this embodiment as well, type 1, type 2, and type 3 molding shapes can be formed using the same molding method as in the above embodiment. Furthermore, in this embodiment, even if the inclination angle θ1 of the path of the first punch 50 and the inclination angle θ2 of the path of the second punch 60 are set to 0, no shear stress is applied to the conductor wire 100. By setting the inclination angles θ1 and θ2 to 0, the conductor wire 100 can be molded into three patterns of molding shapes without providing a fine adjustment mechanism for the first punch 50 and the second punch 60. 【0060】 [f] Figure 11 shows a wire forming apparatus 80M equipped with three or more punches. In this example, six punches MP1 to MP6, numbered from the first punch to the sixth punch, are arranged alternately on the A and B sides of the wire 100, moving from the rear to the front. The drive units that advance and retract each of the punches MP1 to MP6 are arranged without interfering with each other and are not shown. 【0061】 The first punch MP1 has the same configuration as the first punch 50 in the above embodiment. The second punches MP2 to the fifth punches MP5, like the first punch MP1, have a forward portion that functions as a punch element on the rear side and a stationary portion that functions as a die element on the front side. The sixth punch MP6, located at the very front, has only a forward portion, like the second punch 60 in the above embodiment. Each forward portion of the second punches MP2 to the sixth punches MP6 can form the second target section T2 to the sixth target section T6 by sandwiching a conductor wire 100 between it and the stationary portion of the punch numbered immediately before it. 【0062】 By combining a pattern in which the forward section advances to a position to form the conductor wire 100, and a pattern in which it stops at a position where it contacts the conductor wire 100, the conductor wire 100 can be formed into various shapes, from the first punch MP1 to the sixth punch MP6. 【0063】 In this configuration as well, the fact that "the first punch MP1 has a forward portion and a stationary portion, and the second punch MP2 has at least a stationary portion" is the same as in the above embodiment. Furthermore, if we focus only on the molding shapes of the first and second target sections T1 and T2, the various molding shapes that can be obtained can be classified into one of three types: type 1, type 2, or type 3. In other words, regardless of whether or not there is a third or more punch, a conductor wire molding apparatus 80 (80M) equipped with a conductor wire gripping portion 30 and punch drive portions 75, 76, as well as a terminal die 40, a first punch 50 (MP1), and a second punch 60 (MP2), falls within the technical scope of the invention relating to a "conductor wire molding apparatus". 【0064】 The present invention is not limited in any way to the embodiments described above, and can be implemented in various forms without departing from its spirit. [Explanation of Symbols] 【0065】 100...Conductor wire, 30. Conductor wire gripping section, 40...End die, 410...First stationary part, 50...First punch, 510...First forward section, 520...Second stationary section, 60...Second punch, 620...Second forward section, 75...First punch drive unit, 76...Second punch drive unit, 80...(conductor wire) forming machine, T1...First target interval, T2...Second target interval.

Claims

[Claim 1] A conductor wire forming apparatus that forms a conductor wire (100) extending from the rear, which is the source, to the front, which is the destination, by sandwiching either or both of a predetermined first target section (T1) or a second target section (T2) adjacent to the front of the first target section between a stationary die element and a moving punch element, In a plane of operation including a conductor wire, if we define one side of the conductor wire as side A and the other side as side B, A conductor wire gripping section (30) that grips the conductor wire before molding supplied from the supplier, A terminal die (40) that is stationary on the A side of the conductor wire and has a first stationary part (410) that functions as the die element corresponding to the first target section, A first punch (50) is provided on the B side of the conductor wire so as to be able to advance in a direction approaching the conductor wire and retract in a direction away from the conductor wire, and has a first forward portion (510) that functions as the punch element corresponding to the first target section, and a second stationary portion (520) that functions as the die element corresponding to the second target section, A second punch (60) is provided in front of the terminal die and on the A side of the conductor wire, so as to be able to advance in a direction approaching the conductor wire and retract in a direction away from the conductor wire, and has a second forward portion (620) that functions as the punch element corresponding to the second target section, A first punch drive unit (75) moves the first punch forward and backward in the aforementioned operating plane, A second punch drive unit (76) moves the second punch forward and backward in the aforementioned operating plane, Equipped with, The shape of the conductor wire that is formed in the first target section but not in the second target section is defined as a single molded shape. The shape of the conductor wire that is not formed in the first target section but is formed in the second target section is defined as a two-type molded shape. If the shape of the conductor wire formed in both the first target section and the second target section is a type 3 molded shape, Conductor wires can be formed into the aforementioned Type 1 molding shape and at least one of the Type 2 molding shape or the Type 3 molding shape. The paths of the first punch and the second punch are inclined forward with an angle of inclination (θ1, θ2) greater than 0° and less than 90° with respect to a virtual orthogonal line (Y) perpendicular to the extension direction of the conductor wire on the operating plane. A wire forming apparatus provided with a fine adjustment mechanism (57, 67) that allows for fine adjustment of the position of the second stationary part of the first punch and the position of the second forward part of the second punch, depending on the selection of the type 2 forming shape and the type 3 forming shape. [Claim 2] A method for forming a conductor wire (100) that extends from the source (rear) to the destination (front), wherein one or both of a predetermined first target section (T1) or a second target section (T2) adjacent to the front of the first target section are sandwiched between a stationary die element and a moving punch element to form a predetermined shape, In a plane of operation including a conductor wire, if we define one side of the conductor wire as side A and the other side as side B, A terminal die (40) that is stationary on the A side of the conductor wire and has a first stationary part (410) that functions as the die element corresponding to the first target section, A first punch (50) is provided on the B side of the conductor wire so as to be able to advance in a direction approaching the conductor wire and retract in a direction away from the conductor wire, and has a first forward portion (510) that functions as the punch element corresponding to the first target section, and a second stationary portion (520) that functions as the die element corresponding to the second target section, A second punch (60) is provided in front of the terminal die and on the A side of the conductor wire, so as to be able to advance in a direction approaching the conductor wire and retract in a direction away from the conductor wire, and has a second forward portion (620) that functions as the punch element corresponding to the second target section, The conductor wire forming apparatus (80) is provided, wherein the paths of the first punch and the second punch are inclined forward at an inclination angle (θ1, θ2) greater than 0° and less than 90° with respect to a virtual orthogonal line (Y) perpendicular to the extension direction of the conductor wire on the operating plane. The shape of the conductor wire that is formed in the first target section but not in the second target section is defined as a single molded shape. The shape of the conductor wire that is not formed in the first target section but is formed in the second target section is defined as a two-type molded shape. If the shape of the conductor wire formed in both the first target section and the second target section is a type 3 molded shape, A molding shape selection step (S0) is performed in which the molding shape of the conductor wire is selected from among the aforementioned molded shape 1, molded shape 2, and molded shape 3. Depending on the selected molding shape, one of the following steps is performed: a first-type molding step (S1) in which the conductor wire is molded into the first-type molding shape, a second-type molding step (S2) in which the conductor wire is molded into the second-type molding shape, or a third-type molding step (S3) in which the conductor wire is molded into the third-type molding shape. Includes, The aforementioned mold molding step is, The process includes a first punch advance forming step (S11) in which the first advance portion of the first punch advances toward the first stationary portion of the end die, and a conductor wire is sandwiched between the first advance portion and the first stationary portion to form the die-formed shape, The aforementioned mold 2 molding step is, A first punch forward stopping step (S21) is performed in which the first forward portion of the first punch moves forward toward the first stationary portion of the end die and stops at a position where the end face of the first forward portion contacts the conductor wire, or at a position just before contact. The process includes a second punch advance forming step (S22) in which the second forward portion of the second punch advances toward the second stationary portion of the first punch, and a conductor wire is sandwiched between the second forward portion and the second stationary portion to form the two-type molded shape, The aforementioned mold-3 molding step is The first punch advance forming stop step (S31) involves the first forward portion of the first punch advancing toward the first stationary portion of the end die, forming the die-formed shape with a conductor wire sandwiched between the first forward portion and the first stationary portion, and then stopping at that position. The process includes a second punch advance forming step (S32) in which the second forward portion of the second punch advances toward the second stationary portion of the first punch, and a conductor wire is sandwiched between the second forward portion and the second stationary portion to form the three-type molded shape, A method for forming a conductor wire, further comprising a fine adjustment step (S023) before the type 2 forming step or the type 3 forming step, in which, if the type 2 forming shape or the type 3 forming shape is selected in the forming shape selection step, the position of the second stationary part of the first punch and the position of the second forward part of the second punch are finely adjusted according to the selected forming shape.

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