JP5730926B2 - Press machine - Google Patents

Description

  The present invention relates to a press apparatus provided with a laser welding apparatus for welding an edge portion of a workpiece by laser irradiation.

  Wire harnesses are frequently used for in-car wiring of automobiles. The wire harness is a collective part of a plurality of covered electric wires according to the specifications of in-vehicle wiring. A terminal for connection (hereinafter referred to as a crimp terminal) is crimped to the end of each covered electric wire. When connecting the crimp terminal to the wire end of the wire harness, peel off the insulation coating layer of the wire end to expose the core wire, and crimp the core wire barrel of the crimp terminal to the core wire exposed part to crimp the wire end. Electrical connection with the terminal is made. And the connection part of a crimp terminal and an electric wire terminal is resin-sealed in order to prevent the corrosion of the core wire by the penetration | invasion of the water | moisture content from the connection part with a crimp terminal in the inside of an electric wire (for example, refer patent documents 1 and 2). .

  Moreover, such a crimp terminal performs press molding such as punching or bending using a press device, for example, on a copper strip supplied by a transport device from a state wound in a roll shape. In this press molding, a chain-like chain terminal connected by a carrier held by a transport mechanism for transporting a copper strip in the apparatus is formed. Then, this chain terminal is wound up again in a roll shape, and this time, in the resin sealing device, it is common that the connection portion between the crimp terminal formed in the terminal shape and the wire terminal is resin-sealed. .

Japanese Patent Laid-Open No. 2001-167821 JP 2012-0669449 A

  However, resin-sealing the connection portion between the crimp terminal and the wire terminal is a factor that increases the manufacturing cost of the wire harness. This is because the resin itself used is expensive, and it takes time for the resin to be poured and cured in the resin molding process or the coating process.

  Therefore, the wire connection part (crimp part) of the crimp terminal is bent into a cylindrical shape by press molding, and the two edges at both ends of the plate material that can be bent into the cylindrical shape are joined by laser welding to connect the wire. Attempts have been made to make the parts sealed.

  On the other hand, in the crimp terminal manufacturing process, the press-molded chain terminal is welded by a separately prepared laser welding machine. In performing this welding process, the press-molded terminal is again used. An operation step for precise positioning is required, which causes a limitation on the speeding up of the press molding to be synchronized.

  The problem to be solved by the present invention is to provide a welding machine that improves the welding quality and the production speed by executing the pressing process and the welding process performed in the post-process in one apparatus. It is to provide a pressing device.

  In order to solve the above-described problems, the press device of the present invention forms a chain terminal having a crimping portion that can be crimped by accommodating a conductor portion of a coated conductor by bending a continuously supplied plate-like body into a hollow shape. And a welding machine provided with laser irradiation means for bringing two edges of the crimping part close to each other and irradiating laser light along the two edges to form a sealed structure. The press machine sequentially feeds the chain terminal between a mold composed of a fixed lower mold and an upper mold provided so as to be movable away from the lower mold, and the upper and lower molds. A through-hole capable of irradiating a laser beam in any one of the upper and lower molds in a direction perpendicular to the transport direction of the chain terminal, and the laser irradiation means includes the through-hole The two edges are irradiated with laser light.

  According to the present invention as described above, by incorporating a laser welding machine into a press apparatus, it is possible to perform press processing and welding processing that have been performed in the subsequent post-process in a single apparatus. . Therefore, it is not necessary to wind the workpiece that has been press-molded into a roll once and perform the welding process in the next process, speeding up the process by reducing the number of processing steps, and shifting the terminal position due to winding. It is possible to prevent poor welding based on the above and manufacture a highly accurate terminal.

  In addition, a through hole is provided in either of the upper and lower molds, and laser light can be irradiated through this through hole, so that pressing and welding can be performed in one device without affecting the press working with the mold. it can.

  In another aspect of the present invention, the through hole is formed in the upper mold, and the laser irradiation is performed on the outside of the mold, extending above the opening of the through hole formed in the upper mold. A support member for supporting the means is fixed.

  In this aspect, the laser irradiation means can be fixed directly above the welding position by installing the laser irradiation means outside the mold by the support member, so that the laser irradiation by the laser irradiation means is affected by the vertical movement of the upper mold. Not receive.

  In another aspect, the through hole is formed in the lower mold, and a base supporting the lower mold is formed from below the opening of the through hole formed in the lower mold. An installation section for installing the laser irradiation means is provided so that the laser beam can be irradiated.

  In the above aspect, the laser irradiation means can be installed only by providing the installation portion on the base and further providing the through hole in the lower mold. In other words, it is possible to incorporate the welding machine into the press apparatus only by processing the mold without providing other installation members.

  In another aspect, the through hole is formed in the upper mold, and the laser irradiation means is fixed to the outside of the mold and is near the opening of the through hole formed in the upper mold. Is provided with a mirror that reflects the laser beam from the laser irradiation means toward the through hole.

  In the above aspect, since the laser irradiation means is installed outside, it is possible to provide a welding machine in the press device with a simple structure. In particular, since the laser irradiation means is not inserted into the press machine, it is easy to prevent vibrations and stains of the laser irradiation means.

  In another aspect, the mirror is fixed to the upper mold, and the laser irradiation means is configured so that the reflected light of the mirror that moves in accordance with the separation movement of the upper mold is the two edge portions. The laser beam is irradiated toward the mirror so as to move along the axis.

  In the above aspect, since the laser irradiation means is installed outside as in the above aspect, a welding machine can be provided in the press device with a simple structure.

  In another aspect, the mirror is fixed to an arm provided by extending from the laser irradiation means fixed to the outside of the mold above the opening of the through hole formed in the upper mold. The laser irradiation unit irradiates the laser beam toward the mirror so that the reflected light of the mirror moves along the two edges.

  In the above aspect, since the laser irradiation part is installed outside as in the above aspect, a welding machine can be provided in the press device with a simple structure.

  According to the present invention as described above, the laser welding apparatus is provided which improves the welding quality and the production speed by executing the press working and welding work performed in the subsequent process in one apparatus. A pressing device can be provided.

The schematic block diagram of the press apparatus in the 1st Embodiment of this invention. The schematic diagram (a)-(d) which shows the manufacturing process of the crimp terminal in the 1st Embodiment of this invention. The perspective view which shows the external appearance structure of the crimp terminal manufactured through the process of FIG. The schematic diagram which shows the process of the press apparatus in the 1st Embodiment of this invention. The block diagram of the press apparatus in the 2nd Embodiment of this invention. The block diagram of the press apparatus in the 3rd Embodiment of this invention. The schematic diagram which shows the process of the press apparatus in the 3rd Embodiment of this invention. The block diagram of the press apparatus in the 4th Embodiment of this invention. The schematic diagram which shows the process of the press apparatus in the 4th Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described for each embodiment with reference to the drawings.

[1. First Embodiment]
The press apparatus 1 which concerns on the 1st Embodiment of this invention is demonstrated with reference to FIGS. 1-4. First, the schematic structure of the press apparatus 1 of this embodiment is shown. As shown in the perspective view of the press apparatus 1 in FIG. 1, the press apparatus 1 is an apparatus that executes press molding and subsequent steps (laser welding in the present embodiment) in one press apparatus.

  This press 10 is an apparatus for forming a chain terminal by performing press molding such as punching or bending while intermittently transporting a copper strip, which is a plate-like body supplied continuously, by a feed mechanism (not shown). It is. Moreover, the laser welding machine 11 irradiates and joins the crimp terminal formed in the chain terminal by irradiating a laser beam.

  Specifically, as shown in FIG. 2, the copper strip CS unwound from the roll shape (FIG. 2A) is subjected to punching as a primary press to obtain FIG. 2B. The chain terminal TS1 shown is formed. In the chain terminal TS1, carrier portions C1 and C2 for transporting the chain terminal TS1 in the feeding direction in the press machine 10 are formed above and below the chain terminal T1. The carrier portions C1 and C2 are provided with a plurality of feed holes H (in this case, one each in accordance with the position of the crimp terminal T) for inserting feed pins (not shown) for positioning during transport. Between the carrier portions C1 and C2, a portion forming the cylindrical crimp portion Ta of the individual crimp terminal ST and a box-shaped connector portion Tb serving as a connection portion with other terminals are formed in the subsequent process. (See FIG. 3).

  In FIG. 2C, a chain terminal T2 shown in FIG. 2C is formed by bending as a secondary press. In this chain terminal T2, the carrier part C2 is removed, and only the carrier part C1 is provided. Moreover, as shown in FIG. 3, the crimping | compression-bonding part Ta and the connector part Tb will be in the state formed in the cylinder shape and the box shape, respectively, as shown in FIG. In this state, the crimping portion Ta is formed with a butt interface Tc formed in a cylindrical bent portion. Here, the abutting interface Tc refers to a portion where the side surface of one end portion of the crimping portion and the side surface of the other end portion are abutted and brought into contact with each other. In the present embodiment, butt welding is shown as an optimal example, but the present invention is not limited to such butt welding, and for example, it is possible to form a sealed structure by overlapping both ends of a plate material. . In this case, lap welding is performed instead of butt welding.

  The laser welding machine 11 is an apparatus that joins a butt interface Tc formed in a bent portion of a chain terminal by laser welding to make a wire connection part a sealed structure. The laser welder 11 is also a device that performs laser welding and seals the connection portion between the crimping portion Ta and the connector portion Tb in order to suppress water from entering the conductor portion. Specifically, as shown in the perspective view of FIG. 3, the butt interface Tc formed in the axial direction is formed at the upper end portion of the crimp portion Ta that is bent into a cylindrical shape in the individual crimp terminal T. Laser welding. Further, the connecting portion between the crimping portion Ta and the connector portion Tb is crushed to form the connecting portion Td, and the sealing portion is laser welded to suppress the penetration of water into the conductor portion.

  In this embodiment, the workpiece is used as the copper strip CS as described above, and a plate material made of a copper alloy is used. Of course, the material of the workpiece is not limited to a copper alloy, and for example, an aluminum-based material may be used as the workpiece. In this embodiment, the plate thickness of the workpiece is 0.25 mm or 0.32 mm, but the plate thickness is not limited to these.

  Further, fiber laser welding is used for laser welding of the laser welding machine 11 described above. Since the fiber laser has excellent beam quality and high condensing property, it is possible to realize laser welding having a higher energy density in the processing region than a conventional laser. For this reason, it is possible to process the material at a high speed, and it is possible to perform deep penetration welding with a low aspect ratio and high aspect ratio. It is possible to appropriately seal the butted or overlapped portion of the edge and the overlapped portion of the connection portion Tc. The fiber laser may be irradiated by continuous oscillation, pulse oscillation, QCW oscillation, or pulse-controlled continuous oscillation. The fiber laser may be a single mode or multimode fiber laser.

  In the present invention, a laser beam such as a YAG laser, a semiconductor laser, a disk laser, or an electron beam may be used instead of the fiber laser welding.

  Returning to FIG. 1, a specific configuration of the press apparatus 1 will be described. The press machine 10 includes a lower mold 13 fixed to a bolster plate 15 serving as a base, and an upper mold 14 provided on a slide 16 that can move away from the lower mold 13 in the vertical direction in the figure. And a transport mechanism (not shown) for intermittently transporting the chain terminals TS between the upper and lower molds 12. In addition, since the conveyance mechanism uses the well-known mechanism used for the conventional press apparatus which conveys the copper strip CS with a roller, detailed description is abbreviate | omitted here.

  As described above, the lower mold 13 is held on the bolster plate 15 and includes the transport path TR of the chain terminal in a straight line at the center. On the other hand, the upper mold 14 is supported by the slide 16 and, as shown in the figure, provided with a notch 14c formed by notching one of the columns 14a and 14b supported by the slide 16, A space for inserting a laser irradiation unit 17 described later is provided. In addition, a through hole TH in which the laser irradiation unit 17 can irradiate the laser beam LB is formed in a central portion of the upper mold 14 in a direction orthogonal to the chain terminal conveyance direction.

  On the other hand, the laser welder 11 includes a laser light source (not shown), a laser irradiation unit 17 fixed to the bolster plate 15, and a bracket 18 (support member) that supports the laser irradiation unit 17.

  The laser irradiation unit 17 is an optical device for guiding laser light output from a laser light source (not shown) to the welding position P. The laser irradiation unit 17 includes a galvano scanner 17A and a condenser lens 17B. As shown in FIG. 1, in order to separate the laser light source and the optical device, there are transmission using a mirror or transmission using a fiber cable. Mirror transmission is weak against vibration and regular alignment is required, whereas fiber transmission is capable of transmitting laser light into the fiber and is strong against vibration and alignment-free. As such a fiber-transmittable laser, there are a fiber laser and a YAG laser as in the above-described example.

  The galvano scanner 17A is a two-axis (XY) -type or three-axis (XYZ) -type galvano scanner, and two mirrors 17X, 17Y whose angles are controlled in synchronization with each other around axes orthogonal to each other from the laser light source. The laser beam LB is swept to the butt interface Tc of the crimp terminal T stopped at the welding position P by sequentially reflecting the laser beam LB. The galvano scanner 17A is driven and controlled by a galvano control device. The irradiation position in the horizontal plane of the laser beam LB can be adjusted by controlling the angles of the mirrors 17X and 17Y, and the sweep speed of the laser beam LB can be adjusted by controlling the rotation speed of the mirrors 17X and 17Y. .

  The condensing lens 17B is an optical lens that condenses the laser light from the galvano scanner 17A at the position of the butt interface Tc of the crimp terminal T. As the condenser lens 17B, a telecentric lens or an f-θ lens is used.

  In this embodiment, since the laser processing region of the crimp terminal has a three-dimensional structure, it is necessary to use a three-axis type for the galvano scanner 17A. However, when the surface of the terminal to be processed has a two-dimensional shape, the laser light is perpendicularly incident and no focus correction is required. Therefore, the galvano scanner 17A can be a two-axis type.

  Similarly to the lower mold 13, the bracket 18 is a member that extends to the bolster plate 15 above the opening of a through hole formed in the upper mold 14 and supports the laser irradiation unit 17. More specifically, the bracket 18 is formed in an L shape in a side view, and is a beam 18a that rises from the bolster plate 15 in the vertical direction and extends from the outside of the mold 12 in the horizontal direction to mount the laser irradiation unit 17. Part 18b.

  The bracket 18 is ideally provided on the bolster plate 15 that is not separated from the mold 12 and has the same vibration component as the processing target crimp terminal T as shown in the figure. As long as the die 14 does not move up and down together, it may be fixed to another location.

  In the press apparatus 1 having the above-described configuration, as shown in the schematic diagrams of FIGS. 4A to 4C, a plurality of upper molds 14 are provided for the copper strip CS that is intermittently conveyed in the arrow direction. 3 is formed on the chain terminal TS by repeating the up and down movement. That is, as shown in FIG. 4 (c), a laser welding zone by the laser welding machine 11 is provided from the upstream side in the conveying direction during the press molding of the three steps as the first press zone and the three steps as the second press zone. Laser welding is performed on the chain terminal TS. In FIG. 4C, only the processing for the crimping portion Ta is extracted from the crimping terminal T shown in FIGS.

  More specifically, in the preceding press zone, first, the copper strip CS is punched ((1) in FIG. 4 (a)), and then the punched plate is bent into a semicircular shape (FIG. 4 ( In (2)) of a), the shape of the crimp terminal T is formed by bending into a circular tube in the next step ((3) of FIG. 4A). In the subsequent process, the connecting portion Td is formed by crushing the connecting portion between the circular crimping portion Ta and the connector portion Tb ((4) in FIG. 4A). Subsequently, when the crimp terminal T of the chain terminal TS is conveyed to the welding position P, the crimp terminal stopped at the welding position P by the laser irradiation unit 17 as shown in FIG. The laser beam LB is swept and irradiated onto the butt interface Tc and the sealing portion of T ((5) in FIG. 4A). Thereby, the crimping part Ta as shown in the perspective view of FIG. 3 is formed ((6) of FIG. 4A).

  According to the press device 1 of the present embodiment as described above, by incorporating the laser welding machine 11 into the press device 1, the press work and the weld work that have been conventionally performed in separate lines can be performed by one device. Can be executed in. Therefore, after the press working, the work process of accurately positioning the press-molded terminal again when performing the welding process can be omitted, so that the processing speed can be increased by reducing the processing steps.

  In the present embodiment, since the upper mold 14 is provided with a through hole TH and the laser beam LB can be irradiated through the through hole TH, the press process and the welding process can be performed without affecting the press process by the mold 12. Can be realized in one apparatus.

  Moreover, since the laser irradiation part 17 can be fixed directly above the welding position P by installing it on the bolster plate 15 that supports the lower mold 13 outside the mold 12 by the bracket 18. Laser irradiation by the laser irradiation unit 17 is not affected by the vertical movement of the upper mold 14.

  The laser irradiation unit 17 can be installed on the mold 12 by providing a notch 14c in the column 14b of the upper mold 14 and providing a through hole TH in the upper mold 14, and thus realized by improving the conventional press device. Is possible.

  In the present embodiment described above, it is possible to provide a press apparatus provided with a welding machine capable of performing high-speed and high-precision pressing and welding.

[2. Second Embodiment]
A press device 2 according to a second embodiment of the present invention will be described with reference to FIG. The press apparatus 2 is a modification of the installation position of the laser irradiation unit 17 of the press apparatus 1 in the first embodiment. Hereinafter, this point will be described, and the description of the configuration common to the first embodiment will be omitted.

  As shown in FIG. 5, the press device 2 has a laser irradiation unit 17 provided at the lower part of the lower mold 13. More specifically, in the bolster plate 15 that supports the lower mold 13, an installation hole 15 </ b> A for storing the laser irradiation unit 17 and a storage groove for storing a cable CA for connecting the laser irradiation unit 17 and a laser light source (not shown). 15B is formed and the laser irradiation part 17 is accommodated.

  Further, the lower mold 13 is provided with a through hole TH formed so that the laser beam LB from the laser irradiation unit 17 is irradiated to the chain terminal TS transported on the transport path TR provided in the lower mold 13. It has been.

  Further, an air flow path AR is provided above the installation hole 15A so as to cross the through hole TH. An air injector (not shown) and a suction device are connected to the air flow path AR. By this air injector and suction device, a push-pull type air flow is formed in the air flow path AR in the direction indicated by the arrow in the figure. Even if the laser irradiation unit 17 is provided in the lower part by such an air flow, even if the spatter scatters downward from the welding target portion of the crimping unit Ta, the spatter does not accumulate on the laser irradiation unit 17 and is sucked. It is possible to suck to the machine side.

  In this embodiment, the upper mold 14 has the same reference numerals as those in the first embodiment, but the columns 14a and 14b of the upper mold 14 in the first embodiment are not formed. A support member 14 d that supports the entire surface of the upper mold 14 is provided.

  Further, as described above, since the laser irradiation is performed on the crimping terminal T of the chain terminal TS from below the lower mold 13, the butt interface Tc in the crimping portion Ta of the crimping terminal T faces the lower side which is the laser irradiation side. Therefore, the press forming of the bending process is performed toward the surface opposite to that of the first embodiment.

  Also in this embodiment, as in the first embodiment, since the portion where the laser processing of the terminal is performed has a three-dimensional structure, it is necessary to use a three-axis type for the galvano scanner 17A. In addition, when the laser processing portion of the terminal has a two-dimensional structure, the laser light is perpendicularly incident, so that the galvano scanner 17A can use a two-axis type.

  According to the press device 2 as described above, in addition to the effects of the first embodiment, the bolster plate 15 is provided with an installation portion including the installation hole 15A and the storage groove 15B, and the lower mold 13 is provided with the through hole TH. The laser irradiation unit 17 can be installed simply by providing the laser irradiation unit 17. In other words, it is possible to incorporate the welding machine into the press apparatus only by processing the mold without providing other installation members.

[3. Third Embodiment]
A press device 3 according to a third embodiment of the present invention will be described with reference to FIGS. The press device 3 is obtained by changing the installation position of the laser irradiation unit 17 of the press device 1 in the first embodiment. Hereinafter, this point will be described, and the description of the configuration common to the first embodiment will be omitted.

  As shown in FIG. 6, the press device 3 includes a laser irradiation unit 17 provided outside the mold 12 and a laser irradiation unit 17 provided outside the opening PE of the through hole TH of the upper mold 14. Is provided with a mirror 17 </ b> C that reflects the laser beam LB from the laser beam LB toward the welding position P on the lower mold 13.

  The laser irradiation unit 17 provided outside is placed on a bracket 18 provided on a bolster plate 15 serving as a base, and is set so that the optical axis of the condenser lens 17B is directed toward the mirror 17C.

  In the press device 3 as described above, the mirror 17 </ b> C is applied to the upper die when the laser beam LB is swept onto the butt interface Tc of the crimping portion Ta of the crimping terminal T during one lifting stroke of the upper die 14. Therefore, it is necessary to change the optical axis of the laser beam LB irradiated from the laser irradiation unit 17 toward the mirror 17C. This point will be described with reference to FIG.

  FIG. 7A is a stroke curve showing the raising / lowering operation of the upper mold 14, where the vertical axis represents the position and the horizontal axis represents the rotation angle of the motor that raises / lowers the upper mold 14. FIG. 7 (b) picks up five aspects of the movement of the upper mold 14 that moves up and down along the curve shown in FIG. 7 (a), and the laser beam LB is directed from the laser irradiation unit 17 toward the mirror 17C. The irradiation direction and reflection at the mirror 17C are schematically shown.

  (1) and (5) in FIG. 7 (b) show the positions where the upper mold 14 is raised, and this aspect is the position where the irradiation of the laser beam LB from the laser irradiation unit 17 is started, respectively. The position to end. The phase from (1) to (2) in FIG. 7B is that laser irradiation is performed so that the laser beam LB is irradiated along the interface from the end portion of the butt interface Tc between the laser irradiation unit 17 and the crimping unit Ta. This is an aspect in which the laser beam LB is irradiated from the portion 17 toward the mirror 17C, and the welding to the butt interface Tc is finished in the stage (2).

  (3) in FIG. 7B is a situation in which the upper mold 14 is lowered and the rotation angle of the motor that drives the upper mold 14 in contact with the lower mold 13 is 180 degrees. As shown in the drawing, it is an aspect of performing welding of the sealing portion formed in the connection portion Td of the crimping portion Ta, and the laser beam LB is irradiated to the base point for performing laser welding of the sealing portion shown in the drawing. The laser beam LB is irradiated in the horizontal direction from the laser irradiation unit 17 toward the mirror 17C.

  (4) in FIG. 7 (b) shows a situation where the laser welding of the sealing portion formed in the connection portion Td has been completed. As shown in FIG. It is in the stage where the laser welding of the sealing portion to be completed is completed. In addition, in the aspect (3) to (4) in FIG. 7 (the same applies to (3) to (3)), the lowering speed of the upper mold 14 is reduced as shown in FIG. This is a phase where it becomes 0 at 180 ° of 3) and accelerates again. Therefore, the stroke of the upper mold per unit time is a short phase as compared with (1) to (2) and (4) to (5). Therefore, in the aspects (3) to (4), it is possible to facilitate control by performing laser welding on the sealing portion formed in the connection portion Td.

  Thus, as shown in the schematic diagram of FIG. 7B, even when the mirror 17C fixedly installed on the upper mold 14 moves along the elevation of the upper mold 14, the butt interface Tc of the crimping portion Ta. In contrast, the laser beam LB can be swept and irradiated.

  According to the press device 3 as described above, since the laser irradiation unit 17 is installed outside, a welding machine can be installed in the press device with a simple structure. In particular, since the laser irradiation unit 17 is not inserted into the press 10, it is easy to prevent the laser irradiation unit 17 from being vibrated and soiled.

  In this aspect, it is preferable to use a telecentric lens capable of vertical irradiation in the scan area as the condenser lens 17B, and to use a triaxial type for the galvano scanner 17A.

[4. Fourth Embodiment]
A press device 4 according to a fourth embodiment of the present invention will be described with reference to FIGS. The press device 4 is obtained by changing the installation position of the laser irradiation unit 17 of the press device 1 in the first embodiment. Hereinafter, this point will be described, and the description of the configuration common to the first embodiment will be omitted.

  As shown in FIG. 8, the press device 4 is provided with the laser irradiation unit 17 outside the mold 12 at the same position as in the third embodiment, and the opening PE of the through hole TH of the upper mold 14. On the upper side, the mirror bracket 18c is extended from the outside to the inside. The mirror 17C is positioned directly above the opening PE by the mirror bracket 18c, and reflects the laser beam LB from the laser irradiation unit 17 provided outside toward the welding processing position P on the lower mold 13. It is configured.

  In the press device 4 as described above, when the laser beam LB is swept onto the butt interface Tc of the crimping portion Ta of the crimping terminal T, the mirror is irradiated from the laser irradiation unit 17 during one up / down stroke of the upper mold 14. It is necessary to change the optical axis of the laser beam LB irradiated toward 17C. This point will be described with reference to FIG.

  FIG. 9A is a stroke curve showing the lifting and lowering operation of the upper mold 14 as in FIG. 7A in the third embodiment. The vertical axis indicates the position, and the horizontal axis indicates the upper mold 14. Represents the rotation angle of the motor to be lifted.

  FIG. 9B shows five aspects of the movement of the upper mold 14 shown in FIG. 9A and the irradiation direction of the laser beam LB from the laser irradiation unit 17 toward the mirror 17C and the reflection direction of the mirror 17C. Picked up and shown schematically.

  FIGS. 9B and 9B show the positions where the upper mold 14 is raised, and in this aspect, the positions where the irradiation of the laser beam LB from the laser irradiation unit 17 is started respectively. The position to end. The phase from (1) to (2) in FIG. 9B is the laser irradiation so that the laser beam LB is irradiated along the interface from the end of the butt interface Tc between the laser irradiation unit 17 and the crimping unit Ta. This is an aspect in which the laser beam LB is irradiated from the portion 17 toward the mirror 17C, and the welding to the butt interface Tc is finished in the stage (2).

  (3) in FIG. 9B is a situation where the upper mold 14 is lowered and the rotation angle of the motor that drives the upper mold 14 in contact with the lower mold 13 is 180 degrees. As shown in the drawing, it is an aspect of performing welding of the sealing portion formed in the connection portion Td of the crimping portion Ta, and the laser beam LB is irradiated to the base point for performing laser welding of the sealing portion shown in the drawing. The laser beam LB is irradiated in the horizontal direction from the laser irradiation unit 17 toward the mirror 17C.

  (4) in FIG. 9 (b) shows a situation where the laser welding of the sealing portion formed in the connection portion Td has been completed, and as shown in FIG. 9B, it is formed in the connection portion Td of the crimping portion Ta. It is in the stage where the laser welding of the sealing portion to be completed is completed. In addition, in the aspect (3) to (4) in FIG. 7 (the same applies to (3) to (3)), the lowering speed of the upper mold 14 is reduced as shown in FIG. This is a phase where it becomes 0 at 180 ° of 3) and accelerates again. Therefore, the stroke of the upper mold per unit time is a short phase as compared with (1) to (2) and (4) to (5). Therefore, in the aspects (3) to (4), it is possible to facilitate control by performing laser welding on the sealing portion formed in the connection portion Td.

  In this way, as shown in the schematic diagram of FIG. 9B, the laser beam LB can be swept to the butt interface Tc of the pressure-bonding portion Ta as the upper die 14 is moved up and down. . According to the press device 4 as described above, since the laser irradiation unit 17 is installed outside as in the third embodiment, a welding machine can be provided in the press device with a simple structure. .

[5. Other Embodiments]
The present invention is not limited to the above-described embodiment. Various modifications such as design changes can be added to each embodiment based on the knowledge of those skilled in the art, and embodiments to which such modifications are added can also be included in the scope of the present invention.

1, 2, 3, 4 ... Pressing device, 10 ... Pressing machine, 11 ... Laser welding machine, 12 ... (Upper and lower) mold, 13 ... Lower mold, 14 ... Upper mold, 14a, 14b ... Column, 14c ... Notch, 14d ... support member, 15 ... bolster plate, 15A ... installation hole, 15B ... storage groove, 16 ... slide, 17 ... laser irradiation part, 17A ... galvano scanner, 17B ... condensing lens, 17C ... mirror, 17X, 17Y ... Mirror, 18 ... Bracket, 18a ... Column, 18b ... Beam, 18c ... Mirror bracket, CA ... Cable, C1, C2 ... Carrier, CS ... Copper strip, H ... Feed hole, LB ... Laser light, TH ... Through hole, AR ... air flow path, PE ... opening, ST ... (single piece) crimp terminal, T ... crimp terminal, Ta ... crimp part, Tb ... connector part, Tc ... butt interface, TR ... transport path, TS , TS1, TS2 , TS3 Chain terminal

Claims (6)

A press machine that bends a continuously supplied plate-like body into a hollow shape, accommodates a conductor portion of a coated conductor, and forms a chain terminal having a crimping portion that can be crimped;
A welding machine provided with a laser irradiation means that brings two edges of the crimping part close to each other and irradiates a laser beam along the two edges to form a sealed structure.
The press machine forwardly conveys the chain terminal between a mold composed of a fixed lower mold and an upper mold provided to be movable away from the lower mold, and the upper and lower molds. A transport mechanism,
In either of the upper and lower molds, a through hole capable of irradiating a laser beam is formed in a direction perpendicular to the transport direction of the chain terminal,
The said laser irradiation means irradiates a laser beam to the said 2 edge part through the said through hole, The press apparatus characterized by the above-mentioned. The through hole is formed in the upper mold,
The press according to claim 1, wherein a support member that extends above an opening of the through hole formed in the upper mold and supports the laser irradiation unit is fixed outside the mold. apparatus. The through hole is formed in the lower mold,
The base supporting the lower mold is provided with an installation section for installing the laser irradiation means so that the laser beam can be irradiated from below the opening of the through hole formed in the lower mold. The press apparatus according to claim 1, wherein the press apparatus is provided. The through hole is formed in the upper mold,
The laser irradiation means is fixed to the outside of the mold,
The mirror for reflecting the laser beam from the laser irradiation means toward the through hole is provided in the vicinity of the opening of the through hole formed in the upper mold. Press device. The mirror is fixed to the upper mold,
The laser irradiation means irradiates the laser beam toward the mirror so that the reflected light of the mirror that moves in accordance with the separation movement of the upper mold moves along the two edge portions. The press apparatus according to claim 4. The mirror is fixed to an arm provided by extending from the laser irradiation means fixed to the outside of the mold above the opening of the through hole formed in the upper mold,
The press apparatus according to claim 4, wherein the laser irradiation unit irradiates the laser beam toward the mirror so that reflected light of the mirror moves along the two edges.

Images