Press processing equipment for long parts

Abstract

To provide a press machine for long components at low cost, which is compact and can cope with changes in longitudinal dimensions.SOLUTION: A press machine 10 comprises conveying means 11 capable of conveying a long component F along its longitudinal direction, and a plurality of press working means 12 (12a to 12g) arranged along a conveyance direction X of the long component F and capable of press working a longitudinal end Fa (Fb) of the long component F. The specified press working means 12 among the plurality of press working means 12 (12a to 12 g) is selectively driven according to the conveyance position of the long component F.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a press working device for long parts. [Background technology]

[0002] For example, among automotive parts, rectangular wire is one type of long component that requires specific processing on both longitudinal ends. This rectangular wire is deformed from a long shape into a specific shape (e.g., a roughly U-shape) and then arranged in a predetermined order in slots formed at regular intervals around the circumference of a stator core to form the stator coil of a three-phase motor. Meanwhile, this rectangular wire is covered with an insulating coating. Therefore, in order to electrically connect the rectangular wires that make up each phase, it is necessary to remove the insulating coating from the longitudinal ends of the rectangular wire and then join those ends together.

[0003] Here, Patent Document 1 discloses a method in which a long rectangular wire that has been cut to a predetermined length in advance is rotated around its longitudinal axis while being transported in a predetermined direction, and the corners of the rectangular wire are sequentially chamfered and cut in a number of cutting processes arranged along the transport direction to remove the insulating coating from the corners.

[0004] Furthermore, for the purpose of reducing material costs by avoiding cutting losses, Patent Document 2 discloses a method in which, in the coating removal process of removing the insulating coating of a rectangular wire, a die is pressed against the corner of the rectangular wire to plastically deform it, thereby forming a chamfer at the corner and thereby removing the insulating coating from the corner. In other words, the method discloses a method in which, by pressing the corner of the rectangular wire, a chamfer is formed and the insulating coating is removed at the same time. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-89837 [Patent Document 2] Patent Publication No. 2021-40441 Summary of the Invention [Problem to be solved by the invention]

[0006] Considering that the processing to be performed on both longitudinal ends of the flat wire mainly involves removing the insulating coating and chamfering the corners, and that the processed shape of both longitudinal ends will be symmetrical with respect to an imaginary plane perpendicular to the longitudinal center of the flat wire, as shown in Figure 13, for example, a method can be considered in which the flat wire F is transported in a connected state without being cut, and the required number of press means 100, 100... are arranged along the transport direction, thereby performing multiple press processes on multiple flat wires F, F... simultaneously. In this case, by arranging the required number of press means 100, 100... in a line along the longitudinal direction with an installation interval G equal to the longitudinal dimension L of the flat wire F, multiple different press processes can be performed simultaneously on multiple flat wires F, F.... Furthermore, by performing press processing on the connecting portions C of the flat wires F, F..., one longitudinal end Fa and the other longitudinal end Fb of adjacent flat wires F can be press processed simultaneously. Therefore, a significant improvement in work efficiency can be expected.

[0007] On the other hand, when considering performing multiple press processes on rectangular wires F, F... while they are still connected to one another, as shown in Figure 13, adapting to changes in product type becomes a challenge. That is, when performing multiple press processes on rectangular wire F as shown in Figure 13, the equipment for performing each press process (pressing means 100, 100...) is arranged with an installation interval G equal to the longitudinal dimension L of one rectangular wire F. Therefore, for example, when changing to a rectangular wire F' with a different longitudinal dimension L', as shown in Figure 14, the installation interval G' of the pressing means 100, 100... (or the press molds of each pressing means 100) must be changed according to the longitudinal dimension L' of the changed rectangular wire F'. However, moving so many pressing means 100, 100... poses problems such as excessive effort and cost. Furthermore, since equipment for moving them is required, this contradicts the demand for space saving and makes it difficult to apply.

[0008] The above-mentioned problem is not limited to rectangular wires, but can occur in any long part that requires multiple press workings on both longitudinal ends.

[0009] In view of the above circumstances, the technical problem to be solved in this specification is to provide a press processing device for long parts that is compact yet can accommodate changes in longitudinal dimensions at low cost. [Means for solving the problem]

[0010] The above-mentioned problems are solved by the press working apparatus for long parts according to the present invention. That is, this press working apparatus is a press working apparatus for performing a plurality of press workings on both longitudinal end portions of a long part, and is characterized in that it comprises a conveying means capable of conveying the long part along its longitudinal direction, and a plurality of press working means arranged along the conveying direction of the long part and capable of press working the longitudinal end portions of the long part, and is configured to selectively drive a predetermined press working means among the plurality of press working means according to the conveying position of the long part.

[0011] As described above, the press working apparatus of the present invention selectively drives a predetermined press working means among multiple press working means according to the transport position of the long part. Therefore, when the long part is transported, only the press working means capable of performing press working on the long part can be driven at any time. Therefore, by transporting the long part in a predetermined manner, predetermined press working processes can be sequentially performed by multiple press working means on the same longitudinal end of the long part. Furthermore, the press working apparatus of the present invention only requires selective driving of a predetermined press working means, and does not require driving all press working means simultaneously. Therefore, the spacing between the press working means does not need to be adjusted to the longitudinal dimension of the long part, and they can be installed, for example, in close proximity to each other. As described above, the press working apparatus of the present invention enables efficient press working of the required portions of the long part while keeping the overall press working equipment compact. Furthermore, since changes in the longitudinal dimension can be accommodated without requiring significant movement of the processing equipment, product type changes can be accommodated at low cost.

[0012] In addition, in the press processing device for long parts according to the present invention, each of the multiple press processing means may share a press drive source with the other press processing means, and may be configured so that press force can be selectively applied by the press drive source.

[0013] By providing a press drive source that can be shared by multiple press working means in this way, a series of press working operations can be carried out efficiently with a minimum of drive equipment, making it possible to carry out highly efficient press working while further downsizing the processing equipment.

[0014] Furthermore, when the press drive source is shared as described above, in the press processing apparatus for long parts according to the present invention, the press drive source may be a rotary drive device. In this case, a motion conversion mechanism that converts rotational motion into linear motion may be disposed between the rotary drive device and each press processing means, and the rotational drive force generated by the rotary drive device may be converted into a linear press force by the motion conversion mechanism and selectively applied to the press die of each press processing means.

[0015] In this way, by using a rotary drive device as the press drive source and providing a motion conversion mechanism between this rotary drive device and each press working means, the rotary drive force generated by the rotary drive device can be converted into a linear press force and applied to the specified press die. Therefore, compared to a linear motion device such as a cylinder, the power transmission speed can be easily increased, making it possible to quickly carry out a series of press workings using multiple press working means.

[0016] Furthermore, when a motion conversion mechanism is arranged as described above, in the press processing device for long parts according to the present invention, the motion conversion mechanism may have an output section from which press force is output, and a power transmission block that can be interposed between the output section and each press die, and may be configured to be able to selectively apply press force to the press die by moving the power transmission block in synchronization with the long part and interposing the power transmission block between the output section and the press die.

[0017] When the motion converting mechanism is configured as described above, pressing force can be selectively applied to the desired press die simply by moving the power transmission block in synchronization with the long part. This simplifies the structure of the motion converting mechanism while improving the responsiveness of power transmission, enabling a series of press workings to be carried out more quickly.

[0018] In addition, in the press processing apparatus for long items according to the present invention, the long parts may be transported by a conveying device as long workpieces formed by interconnecting both longitudinal ends of a plurality of long parts, and may be capable of being introduced into each press processing means.

[0019] In this way, even if a long workpiece formed by connecting both longitudinal ends of multiple long parts is transported by a transport device and introduced into each press-working means, the press-working equipment can be made compact overall, and a series of press-working processes can be efficiently performed on the necessary parts of the long parts. Furthermore, by transporting multiple long parts together while their longitudinal ends are connected, and performing a series of press-working processes on the connected parts, press-working can be performed simultaneously on one longitudinal end of one adjacent long part and the other longitudinal end of the other long part. This allows for highly symmetrical longitudinal ends, so that, for example, if the long parts are rectangular wires, the ends of the rectangular wires can be precisely overlapped and joined. [Effects of the Invention]

[0020] As described above, the press processing device for long parts according to the present invention makes it possible to provide a press processing device for long parts that is compact yet can accommodate changes in longitudinal dimensions at low cost. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a front view of a flat wire press processing device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the stamping device shown in FIG. [Figure 3] 2 is a cross-sectional view of the stamping device shown in FIG. 1 along the line AA. [Figure 4] 1A to 1C are front views of the press working device showing the flow of press working by the most upstream press working means. [Figure 5] 10 is a front view of the press working apparatus showing a state when press working is performed by the press working means located second most upstream. FIG. [Figure 6] FIG. 10 is a front view of the press working apparatus showing a state in which press working by the most downstream press working means has been completed. [Figure 7]1 is a front view of the press working device showing the state after a series of press workings have been performed on both longitudinal ends of the rectangular wire. FIG. [Figure 8] FIG. 1 is a perspective view of a longitudinal end portion of a rectangular wire after a series of press working processes have been performed. [Figure 9] 5 is a cross-sectional view taken along line AA of a press processing device for a rectangular wire according to a second embodiment of the present invention. [Figure 10] FIG. 10 is a plan view of a flat wire press processing device according to a third embodiment of the present invention. [Figure 11] FIG. 10 is a front view of a press processing device for a rectangular wire according to a fourth embodiment of the present invention. [Figure 12] 12 is a side view of the main part of the stamping device shown in FIG. 11 as viewed in the direction of arrow B. FIG. [Figure 13] FIG. 10 is a front view of a flat wire press processing device according to another invention. [Figure 14] FIG. 14 is a front view showing the state of the stamping device shown in FIG. 13 after a layout change due to a change in the type of rectangular wire. DETAILED DESCRIPTION OF THE INVENTION

[0022] The details of the press working device for long parts according to the first embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the case where both longitudinal ends of a long rectangular wire are subjected to multiple press workings to remove the insulating coating and perform chamfering will be described as an example.

[0023] Fig. 1 shows a schematic front view of the overall configuration of a flat wire press processing device 10 according to this embodiment. Fig. 2 shows a plan view of the press processing device 10 shown in Fig. 1. This press processing device 10 includes a conveying means 11 capable of conveying a flat wire F as a long part, a plurality of press processing means 12 capable of performing predetermined press processing on the flat wire F being conveyed by the conveying means 11, and a press driving source 13 that applies a driving force to each press processing means 12.

[0024] In this embodiment, the press working device 10 further includes a motion conversion mechanism 14 disposed between the press drive source 13 and each of the press working means 12. Each element will be described in detail below.

[0025] The conveying means 11 is capable of conveying a rectangular wire F as a long part, and in this embodiment, is configured to convey a rectangular wire material W (corresponding to the long workpiece according to the present invention) in a state in which a plurality of rectangular wires F are interconnected along its longitudinal direction. Here, the conveying means 11 is composed of, for example, one pair or multiple pairs of rollers 15, and by driving at least some of the rollers 15, the rectangular wire material W sandwiched between each pair of rollers 15, 15 can be moved along its longitudinal direction at a predetermined speed. At this time, the moving speed of the rectangular wire material W (including a stopped state) can be adjusted, for example, by controlling the rotation, stopping, and rotation speed of the drivable rollers 15.

[0026] In this embodiment, the conveying means 11 is configured with a plurality of pairs of rollers 15, but it is of course possible for the conveying means 11 to have a configuration other than the above. Any known conveying mechanism can be used for the conveying means 11 as long as it can convey a roughly elongated object along its longitudinal direction.

[0027] The press processing means 12 has a press die 16 that is driven by receiving a pressing force as a driving force, and a pressed die 17 that receives the pressing force from the press die 16. In this embodiment, the press die 16 is supported so as to be movable along a columnar guide 18 that stands upright from the pressed die 17, as shown in Fig. 2. In addition, an elastic member 19 is disposed on the outer periphery of the columnar guide 18, and as the press die 16 approaches the pressed die 17, an elastic restoring force can be applied to the press die 16 in a direction that moves the press die 16 away from the pressed die 17.

[0028] In addition, the contact portion of each press die 16 with the flat wire F is provided with a processing portion 16a of a shape corresponding to the type of press processing to be performed by each press processing means 12, and the desired press processing can be performed by pressing this processing portion 16a against a predetermined portion of the flat wire F. For example, as in this embodiment, when performing coating removal processing and chamfering processing on the connecting portion C of the flat wire F, a shaping portion corresponding to the shape and size of the target portion is provided as the processing portion 16a.

[0029] The press working means 12 having the above configuration are provided along the conveying direction X of the rectangular wire F in the same number as the number of press workings to be performed. In this embodiment, as shown in Fig. 1, seven press working means 12 (12a, 12b...12g) are arranged close to each other.

[0030] The press drive source 13 is configured to be able to selectively apply a driving force that serves as a pressing force to the press die 16 of each press processing means 12. In this embodiment, the press drive source 13 is a rotation drive device such as a motor, and is disposed above each press processing means 12.

[0031] The motion conversion mechanism 14 is disposed between the press drive source 13 and the press working means 12 and is configured to convert the rotational drive force generated by the press drive source 13 into a press force in the clamping direction of the press dies 16. The motion conversion mechanism 14 may take any form. For example, in this embodiment, the motion conversion mechanism 14 is configured to include a cam 20 attached to the rotary shaft 13a of a rotary drive device serving as the press drive source 13, a press plate 21 that can move in a predetermined direction (the clamping direction of the press dies 16) as the cam 20 rotates, and a power transmission block 22 that is positioned between the press plate 21 and the press dies 16 of each press working means 12 and can selectively apply the press force from the press plate 21 to a predetermined press die 16. In this case, the press plate 21 corresponds to the output unit according to the present invention and, as shown in FIG. 2, is configured to be movable up and down in the clamping direction of the press dies 16 by a guide member 23 provided around it.

[0032] In this case, the power transmission block 22 can be positioned between any of the press dies 16 and the press plate 21, and is configured to be movable between a predetermined press die 16 and the press plate 21, for example, by a slide mechanism (not shown). In this case, it is desirable that the power transmission block 22 be configured to receive the pressing force from the press plate 21 and descend together with the press die 16. It is also desirable that the power transmission block 22 move in synchronization with the connecting portion C of the rectangular wire F. More specifically, it is desirable that the power transmission block 22 be configured to be movable in synchronization with the rectangular wire material W so as to be positioned directly above the connecting portion C of the rectangular wire F to be pressed, as shown in FIG. 1.

[0033] In this embodiment, the power transmission block 22 has a flange portion 22a on its upper side (the press plate 21 side) that protrudes in a direction perpendicular to the conveyance direction of the rectangular wire W (see FIG. 3 ). The flange portion 22a is configured to be engageable with a hook portion 24 that protrudes from the underside of the press plate 21. Therefore, when the press plate 21 rises from a state in which the press plate 21 presses the power transmission block 22 downward (the state shown by the two-dot chain line in FIG. 3 ), the flange portion 22a of the power transmission block 22 is lifted by the hook portion 24, allowing the power transmission block 22 to return to a height position where it can slide (the position shown by the solid line in FIG. 3 ). At this time, the press die 16 also rises using the restoring force of the elastic member 19. However, it is desirable that the power transmission block 22 be configured to be able to rise to a position where the abutment between the power transmission block 22 and the press die 16 is released.

[0034] Next, an example of press working of a rectangular wire W using the press working device 10 having the above configuration will be described mainly with reference to FIGS.

[0035] First, as shown in Figure 4(a), the flat wire material W before the series of press processes is conveyed in a predetermined direction by the conveying means 11, and the connecting portion C of the flat wire F of the flat wire material W is introduced between the press die 16 and the pressed die 17 of the press process means 12 located most upstream (hereinafter referred to as the first press process means 12a, the second press process means 12b, ... the seventh press process means 12g, in order from the upstream side). At this time, the power transmission block 22 is moved and positioned directly above the press die 16a of the first press process means 12a.

[0036] Then, from the state shown in Figure 4(a), the rotary drive device serving as the press drive source 13 is driven to generate a rotational drive force. This causes the cam 20 mechanically connected to the press drive source 13 to rotate about its axis, causing the press plate 21 to descend, thereby pressing downward the power transmission block 22 located between the press plate 21 and the press die 16a of the first press working means 12a. As a result, a press force in the die clamping direction is selectively applied to the press die 16a of the first press working means 12a via the power transmission block 22, and a predetermined press working is performed on the connection portion C located between the press die 16a and the pressed die 17 (see Figure 4(b)).

[0037] Thereafter, the press plate 21 is raised by the rotational drive of the press drive source 13 (see FIG. 4(c)). As a result, the flange portion 22a of the power transmission block 22 is lifted by the hook portion 24 of the press plate 21 (see FIG. 3), and the power transmission block 22 returns to a position where it can move in the conveyance direction X.

[0038] After the press working is performed by the predetermined press working means 12 (first press working means 12a) as described above, the flat wire W and the power transmission block 22 are synchronously moved in the conveying direction X, and the pressed joint portion C and the power transmission block 22 are introduced together into a position corresponding to the press die 16b of the second press working means 12b (see FIG. 5). Then, as in the case of the first press working means 12a, the press drive source 13 is driven to lower the press plate 21, thereby pressing the power transmission block 22, which is located between the press plate 21 and the press die 16b of the second press working means 12b, downward (not shown). As a result, a press force in the die clamping direction is selectively applied to the press die 16b of the second press working means 12b via the power transmission block 22, and the predetermined press working is performed on the joint portion C, which is located between the press die 16b and the pressed die 17. After the press working, the press plate 21 is raised by the rotational drive of the press drive source 13, and the flange portion 22a of the power transmission block 22 is lifted, thereby returning the power transmission block 22 to a position where it can move in the conveying direction X.

[0039] For the third press processing means 12c and thereafter, in the same manner as the first and second press processing means 12a, 12b, the flat wire W and the power transmission block 22 are moved synchronously and the press drive source 13 is driven, so that the press processing is sequentially performed by each of the press processing means 12c to 12g on the same connecting portion C. Then, when the last press processing means 12 (here, the seventh press processing means 12g) performs press processing on the connecting portion C, one longitudinal end Fa of the flat wire F located at the connecting portion C is formed into a predetermined shape and the connecting portion C is cut (see FIG. 6).

[0040] In this case, as shown in FIG. 6, for example, the connecting portion C1 (one longitudinal end Fa of the flat wire F) is located at a position corresponding to the seventh pressing means 12g on the most downstream side, and the connecting portion C2, which includes the portion that will become the other longitudinal end Fb of the flat wire F, is located upstream of the first pressing means 12a on the most upstream side. In other words, the installation interval G of the multiple pressing means 12a-12g is set to a predetermined size to achieve the above-mentioned positional relationship (see FIG. 7). Therefore, after the series of pressing processes for the one longitudinal end Fa of a specific flat wire F is completed, the flat wire material W is further moved in the conveying direction X, and the power transmission block 22 is moved to the same conveying direction position as the connecting portion C2, and the press drive source 13 is driven. This allows the above-mentioned series of pressing processes to be performed on the connecting portion C2, including the portion that will become the other longitudinal end Fb of the flat wire F. As a result, as shown in Figure 7, the other longitudinal end Fb of the flat wire F located at the connecting portion C2 is formed into a predetermined shape, and the connecting portion C2 is cut, resulting in a flat wire F with both longitudinal ends Fa, Fb subjected to a predetermined press processing.

[0041] 8 shows an example of the shape of the longitudinal end Fa (Fb) of the rectangular wire F after being pressed by the multiple press-working means 12a-12g. That is, in this illustrated example, the insulating coating Fc covering each end Fa, Fb is removed from the entire periphery, exposing the conductor Fd having a substantially rectangular parallelepiped shape. In addition, the corner c1 between the wide-side flat portion f1 and the narrow-side flat portion f2 of this conductor Fd is chamfered, and the corner c2 between the wide-side flat portion f1 and the tip surface f3, and the corner c3 between the narrow-side flat portion f2 and the tip surface f3 are also chamfered (chamfered portions are formed).

[0042] After the flat wire F has been obtained by the series of press workings as described above, the flat wire F is subjected to a predetermined bending process or the like to complete a coil segment made of the flat wire.

[0043] As described above, the press-forming device 10 for flat wire F according to this embodiment selectively drives a predetermined press-forming means 12 among the multiple press-forming means 12 (12a-12g) corresponding to the conveying position of the flat wire F. Therefore, during conveyance of the flat wire F, only the press-forming means 12 capable of pressing the flat wire F can be driven. Therefore, for example, by conveying the flat wire F in a constant manner (e.g., a constant conveying direction and conveying speed), predetermined press-forming processes can be sequentially performed by the multiple press-forming means 12a-12g on the same longitudinal end Fa (Fb) of the flat wire F (see FIGS. 4-7). Furthermore, according to the press-forming device 10 according to this embodiment, selective driving of a predetermined press-forming means 12 is sufficient; it is not necessary to simultaneously drive all of the press-forming means 12a-12g. Therefore, the installation interval G of the press-forming means 12a-12g does not need to be adjusted to the longitudinal dimension L of the flat wire F, and the installation interval G can be significantly reduced. As described above, the press processing device 10 according to this embodiment makes it possible to efficiently perform a series of press processes on the required portion (here, the joint C) of the rectangular wire F while keeping the overall press processing equipment compact. Also, since it is possible to accommodate changes in the longitudinal dimension L without requiring significant movement of the processing equipment, it is possible to accommodate product type changes at low cost.

[0044] In addition, in this embodiment, the flat wire material W as a long workpiece formed by connecting the longitudinal ends Fa, Fb of a plurality of flat wires F to each other is conveyed by the conveying means 11, and predetermined connecting portions C can be sequentially introduced into each pressing means 12a-12g. In this way, by carrying out a series of pressing processes on the connecting portions C while conveying a plurality of flat wires F together, it is possible to simultaneously press one longitudinal end Fa of one flat wire F and the other longitudinal end Fb of the other flat wire F adjacent to each other. This makes it possible to obtain both longitudinal ends Fa, Fb with excellent symmetry, and therefore it is possible to precisely overlap and join the ends Fa, Fb of the flat wires F.

[0045] In addition, in this embodiment, the total installation width H of the multiple press means 12a-12g arranged along the conveying direction X of the flat wire F is made smaller than the longitudinal dimension L of one flat wire F (see FIG. 7). As a result, when the connecting portion C1 including one longitudinal end Fa of the flat wire F is being pressed by the seventh press means 12g on the most downstream side, the connecting portion C2 including the other longitudinal end Fb of the flat wire F located upstream of the connecting portion C1 is located upstream of the first press means 12a on the most upstream side (see FIG. 6). Therefore, as in this embodiment, a simple configuration can be adopted in which only one press means 12 of the multiple press means 12a-12g can be selectively driven, making it possible to construct a press apparatus 10 that can efficiently perform a series of press operations on both longitudinal ends Fa and Fb of the flat wire F at low cost.

[0046] The first embodiment of the present invention has been described above, but the press processing device for rectangular wire (long parts) according to the present invention can also have configurations other than those described above, as long as they do not deviate from the spirit of the invention.

[0047] 9 shows an AA cross-sectional view of a flat wire press processing device 30 according to a second embodiment of the present invention. This press processing device 30 differs from the first embodiment in the lifting structure of the press die 16. More specifically, in this press processing device 30, the power transmission block 31 has a first flange portion 31a on the press platen 21 side and a second flange portion 31b on the press die 16 side.

[0048] Here, when the power transmission block 31 is disposed between the press plate 21 and the press die 16, the first flange portion 31a and the hook portion 24 protruding from the underside of the press plate 21 are engageable, and the second flange portion 31b and the hook portion 32 protruding from the top surface of the press die 16 are engageable. Therefore, when the press plate 21 rises from a state in which the press plate 21 presses the power transmission block 31 downward, the first flange portion 31a of the power transmission block 31 is lifted by the hook portion 24, and the hook portion 32 of the press die 16 is lifted by the second flange portion 31b of the power transmission block 31. As a result, the power transmission block 31 returns to a height position at which it can slide, and the press die 16 can return to the height position it had before pressing.

[0049] In this case, the elastic member 19 (see FIG. 3) is not required, which further simplifies the press working means 12. In addition, since the press die 16 can be raised and lowered in accordance with the raising and lowering speed of the press plate 21, for example, by adopting a structure that allows the press plate 21 to be raised at high speed, it is possible to shorten the time required for one press working and further improve work efficiency.

[0050] 10 shows a plan view of a rectangular wire press working device 40 according to a third embodiment of the present invention. This press working device 40 differs from the first embodiment in the structure of the motion conversion mechanism 14.

[0051] More specifically, the motion converting mechanism 14 according to this embodiment has a plurality of power transmission blocks 41 (here, the same number of power transmission blocks 41a-41g as the number of press working means 12). Each of the power transmission blocks 41a-41g is configured to be movable between a power transmission space 42 between the corresponding press die 16a-16g and the press plate 21 and a standby space 43 located to the side of each of the press working means 12a-12g. The movement of the power transmission blocks 41a-41g can be controlled so that a predetermined power transmission block 41 (such as the fourth power transmission block 41c in FIG. 10) corresponding to the position of the connecting portion C of the rectangular wire F (the position in the conveying direction X) is positioned in the power transmission space 42, and the remaining power transmission blocks 41a, 41b, 41d-41g are positioned in the standby space 43. In this case, it is preferable that the press dies 16a to 16g have a structure in which an elastic member 19 shown in FIG. 3 is used to return them to the height position before pressing.

[0052] With this configuration, the movement distance of the power transmission blocks 41a-41g is always constant. In this case, for example, in the press processing device 10 according to the first embodiment, after pressing is performed by the seventh press processing unit 12g, which is the most downstream, the power transmission block 22 must be moved to the first press processing unit 12a, which is the most upstream. In contrast, in the press processing device 40 according to the present embodiment, it is sufficient to move the seventh power transmission block 41g from the power transmission space 42 to the standby space 43 and the first power transmission block 41a from the standby space 43 to the power transmission space 42. Therefore, compared to the first embodiment, it is possible to shorten the time required to start the series of press processing for the next connection portion C (C2). Furthermore, if the movement distance of the power transmission block 41 is short, the number of options for the power transmission block 41 movement mechanism increases, enabling further compactness and cost reduction.

[0053] Furthermore, although not shown, if the longitudinal dimension L of the flat wire F to be manufactured is slightly smaller than the total installation width H of the multiple press processing means 12a-12g, for example, by arranging both the most upstream power transmission block 41a and the most downstream power transmission block 41g in the power transmission space 42, it is possible to simultaneously press the two connecting portions C (C1, C2). This allows for more flexible response depending on the type of flat wire F to be manufactured.

[0054] 11 shows a front view of a stamping device 50 according to a fourth embodiment of the present invention. This stamping device 50 also differs from the first to third embodiments in the motion converting mechanism 14.

[0055] More specifically, the motion converting mechanism 14 according to this embodiment has a cam shaft 51 arranged parallel to the conveying direction X of the rectangular wire W, and cams 52 provided on the outer periphery of the cam shaft 51, specifically, cams 52a to 52g, the same number as the press working means 12a to 12g. Here, the rotation shaft 13a of the press driving source 13 is coaxially connected to the cam shaft 51, and each cam 52a (52b to 52g) is arranged above the press die 16a (16b to 16g) of the corresponding press working means 12a (12b to 12g).

[0056] 12, the cams 52a to 52g are configured to push the corresponding press dies 16a to 16g to the lowest position at equal circumferential positions (phases) of the cam shaft 51. Therefore, by conveying the flat wire W at a constant speed and rotating the cam shaft 51 at a rotational speed corresponding to the conveying speed of the flat wire W, the corresponding cam 52 can press downward (apply a pressing force) the press die 16 corresponding to the conveying direction position of the connecting portion C.

[0057] According to the above configuration, the motion converting mechanism 14 can be further simplified, which makes it possible to further simplify and compact the entire press working device 50. In addition, it is possible to easily respond to an increase in the press working speed.

[0058] In the above-described embodiments, the motion conversion mechanism 14 is exemplified as a mechanism that converts rotational drive force into linear drive force using the cam 20 (52), but of course, this is not limited to this. For example, although not shown, a link mechanism such as a crank mechanism may be used to convert the rotational drive force generated by the press drive source 13 into linear drive force in the pressing direction. Alternatively, the press drive source 13 may be configured as a linear drive device such as a cylinder, as long as the necessary elevation speed of the press die 16 can be ensured. In this case, the motion conversion mechanism 14 is not required.

[0059] Furthermore, in the above embodiment, an example has been given in which one press drive source 13 is provided in common to all of the installed press working means 12a to 12g, but of course other configurations can also be adopted. For example, although not shown, it is possible to install two press drive sources 13, with one press drive source 13 being able to selectively apply press force to the first to fourth press working means 12a to 12d and the other press drive source 13 being able to selectively apply press force to the remaining press working means 12 (fifth to seventh press working means 12e to 12g), or in other words, to configure the number of press drive sources 13 to be less than the number of press working means 12.

[0060] In addition, in the above explanation, the flat wire material W in the state where a plurality of flat wires F to be manufactured are connected to each other is exemplified as the conveying object and the pressing object, but of course the flat wire F to be manufactured alone may also be the conveying object and the pressing object of the present invention. In this case, although not shown in the figure, a series of pressing processes by a plurality of pressing means 12a to 12g can be sequentially and continuously carried out on one longitudinal end Fa of the flat wire F, and then a series of pressing processes can be sequentially and continuously carried out on the other longitudinal end Fb.

[0061] In addition, in the above explanation, the flat wire F is used as the object of application of the present invention (the object of press working), but of course the present invention may also be used for long parts other than the flat wire F. In other words, the present invention can be applied to any type of long part as long as it is necessary to perform multiple press workings on both ends in the longitudinal direction. [Explanation of symbols]

[0062] 10, 30, 40, 50 Press processing equipment 11. Means of transport 12 (12a-12g) Press processing method 13 Press drive source 14 Motion conversion mechanism 15 Laura 16(16a~16g) Press mold 17 Pressed mold 18 Pillar guide 19 Elastic member 20 Cam 21 Press Plate 22,31 Power transmission block 22a, 31a, 31b flange part 23 Guide member 24 Hook part 32 Hook part 41(41a~41g) Power transmission block 42 Power transmission space 43 Waiting space 51 Camshaft 52(52a~52g) Cam 100 Press processing means C(C1,C2) Connection part c1~c3 corner F flat wire f1,f2 flat part f3 Tip surface Fa, Fb Longitudinal end Fc insulating coating Fd conductor G Installation Spacing H Total installation width L longitudinal dimension W flat wire X conveying direction

Claims

[Claim 1] A press working device for performing a plurality of press workings on both longitudinal end portions of a long part, the press working device comprising: a conveying means for conveying the long part along its longitudinal direction; a plurality of press working means arranged along the conveyance direction of the elongated workpiece and capable of performing press working on longitudinal ends of the elongated workpiece; a press drive source capable of generating a rotational drive force for driving each of the press working means; a motion conversion mechanism that is provided between the press working means and the press drive source and converts a rotational drive force generated by the press drive source into a linear press force that is a force in a direction in which the press working is performed, the motion converting mechanism has an output section to which the press force is output, and a power transmission block that can be interposed between the output section and the press dies of each press working means; The motion conversion mechanism is configured to move the power transmission block in synchronization with the long part, and interpose the power transmission block between the output section and the press die, thereby selectively applying the press force to the press die of a predetermined press processing means among the multiple press processing means that corresponds to the transport position of the long part.

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