JPWO2014129638A1 - Workpiece holding device - Google Patents

Abstract

A workpiece holding device capable of improving welding quality is provided. A workpiece holding device (clamping device) 90 that holds the shape of a workpiece (chain terminal T2), which is obtained by bending a plate-like workpiece to a cylinder and bending the cylinder. One end Td and the other end Te are brought into contact with each other while the one end Td and the other end Te of the chain terminal T2 are joined to form a tubular body (crimped portion Ta). And holding means for holding the cylinder.

Description

  The present invention relates to a workpiece holding device that holds the shape of a workpiece.

  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 this crimp terminal is connected to the wire end of the wire harness, the insulation coating layer of the wire end is removed to expose the core wire, and the core wire barrel of the crimp terminal is crimped and crimped to the exposed portion of the core wire. 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 electric wire (for example, patent document 1 and patent document 2) reference).

Japanese Patent Laid-Open No. 2001-167821 JP2012-0669449

  By the way, in the said patent document 1 and patent document 2, since the connection part of an electric wire terminal and a crimp terminal is resin-sealed, it becomes a factor which increases the manufacturing unit price of a wire harness. This is because the resin itself used is expensive, and it takes time for the resin to be poured or cured in the resin molding process or the coating process.

  Therefore, the wire connection part of the crimp terminal (hereinafter referred to as the crimp part) is bent into a cylindrical shape by press molding, and the entire butted interface at both ends of the plate material formed into the cylindrically bent part is joined by laser welding. Attempts have been made to make the wire connection part a sealed structure.

  However, a gap may occur at the butt interface between both ends of the plate material that can be formed by bending the plate material into a cylindrical shape. The reasons for this include springback, that is, a phenomenon in which deformation is slightly restored due to the elasticity of the material itself, deterioration of the mold, and changes in environmental factors such as temperature. The presence of the gap at the butt interface causes the bonding quality of the butt interface to be deteriorated by laser welding.

  Therefore, the problem to be solved by the present invention is to provide a workpiece holding device capable of improving the welding quality.

  In order to achieve the above object, a workpiece holding device of the present invention described in claim 1 of the present invention is a workpiece holding device that holds the shape of a workpiece, and is a plate-like workpiece. While bending an object into a cylindrical body and joining one end and the other end of the bent cylindrical body to form a tubular body, the one end and the other end And holding means for holding the cylindrical body in contact with each other.

  According to the workpiece holding device of the present invention described in claim 1, in order to hold the cylindrical body by bringing one end portion and the other end portion that are bent into the cylindrical body into contact with each other, One end and the other end can be brought into pressure contact to join the butt interface, and a gap generated at the butt interface or the like can be eliminated to improve the joining quality by laser welding.

  In addition, by holding one end and the other end in contact with each other, for example, to eliminate a gap generated at the butt interface, etc., the butt interface is welded without being limited by the accuracy of the press work. Can do.

  A workpiece holding device according to a second aspect of the present invention is the workpiece holding device according to the first aspect, wherein the holding means has a pair of holding jigs for sandwiching the cylindrical body. Then, the one end and the other end are brought into contact with each other by sandwiching the cylinder from the side of the cylinder with the pair of holding jigs.

  According to the workpiece holding device of the present invention described in claim 2, since the cylindrical body is sandwiched from the side by the pair of holding jigs, the tubular body is damaged when the holding jig is detached from the tubular body. Defects such as sticking do not occur, and deterioration in quality can be suppressed.

  A workpiece holding device according to a third aspect of the present invention is the workpiece holding device according to claim 1, wherein the holding means includes a holding jig for sandwiching the cylindrical body, and the holding device. An external force direction converting portion that converts an external force applied in the vertical direction applied to the cylindrical body by a jig into the left and right direction, and sandwiching the cylindrical body from above or below the cylindrical body with the holding jig. The external force direction converter converts the external force in the vertical direction into the external force in the left-right direction, and makes the one end and the other end abut.

  According to the workpiece holding device of the present invention described in claim 3, the external force in the vertical direction is converted into the external force in the horizontal direction by sandwiching the cylindrical body from above or below with the holding jig. In order to hold the cylinder by bringing one end bent into the cylinder into contact with the other end, for example, one end and the other end are pressed to join the butt interface Therefore, it is possible to eliminate gaps generated at the butt interface or the like and improve the joining quality by laser welding.

  A workpiece holding apparatus according to a fourth aspect of the present invention is the workpiece holding apparatus according to the third aspect, wherein the external force direction changing portion is formed on the holding jig and the cylindrical body. The one end and the other end are brought into contact with each other by sandwiching the cylindrical body in the recess.

  According to the workpiece holding device of the present invention described in claim 4, since the cylindrical body is sandwiched in the recess formed in the holding jig, welding is performed by bringing one end portion into contact with the other end portion. Bonding or the like is possible, and deterioration in quality can be suppressed.

  The workpiece holding device of the present invention described in claim 5 is the workpiece holding device according to claim 3, wherein the external force direction changing portion is formed on the holding jig and the cylindrical body. The substantially half-shaped part is sandwiched between the left and right two points of the cylindrical body so that the one end and the other end are brought into contact with each other. It is characterized by contacting.

  According to the workpiece holding device of the present invention described in claim 5, since the cylindrical body is sandwiched between the substantially C-shaped portions formed in the holding jig, the one end and the other end are brought into contact with each other. It is possible to perform welding joining and the like so that deterioration in quality can be suppressed.

  A workpiece holding device according to a sixth aspect of the present invention is the workpiece holding device according to any one of claims 1, 3 to 5, wherein the one end and the other A laser beam is irradiated and welded to the end, and a holding hole on the side irradiated with the laser beam is formed with a through hole through which the laser beam passes.

  According to the workpiece holding device of the present invention described in claim 6, since the through hole through which the laser beam passes is formed in the holding jig on the side irradiated with the laser beam, welding is performed. The holding jig does not get in the way.

  The workpiece holding device of the present invention described in claim 7 is the workpiece holding device according to claim 1, wherein the holding means includes a holding jig for sandwiching the cylindrical body, and the holding An external force direction converting portion that converts an external force applied in the vertical direction applied to the cylindrical body by a jig into the horizontal direction, and sandwiching the cylindrical body from above and below the cylindrical body with the holding jig. The external force direction converter converts the external force in the vertical direction into the external force in the left-right direction, and makes the one end and the other end abut.

  According to the workpiece holding device of the present invention described in claim 7, the external force in the vertical direction is converted into the external force in the horizontal direction by sandwiching the cylindrical body from above and below with the holding jig. In order to hold the cylinder by bringing one end bent into the cylinder into contact with the other end, for example, one end and the other end are pressed to join the butt interface Therefore, it is possible to eliminate gaps generated at the butt interface or the like and improve the joining quality by laser welding.

  The workpiece holding device of the present invention described in claim 8 is the workpiece holding device according to claim 7, wherein the holding jig sandwiches the cylindrical body from above. A jig and a lower holding jig that sandwiches the cylindrical body from the lower direction, and the external force direction changing portion is formed on the upper holding jig and the lower holding jig, respectively. The concave portion formed on the support side where the cylindrical body is supported is formed larger than the other concave portion.

  According to the workpiece holding device of the present invention described in claim 8, since the concave portion sandwiching the cylindrical body formed on the support side on which the cylindrical body is supported is formed larger than the other concave portion. When the holding jig is detached from the tubular body, defects such as scratches on the tubular body do not occur, and deterioration in quality can be suppressed.

  The workpiece holding device of the present invention described in claim 9 is the workpiece holding device according to claim 7, wherein the holding jig sandwiches the cylindrical body from above. A jig and a lower holding jig that sandwiches the cylindrical body from the lower direction, and the external force direction changing portion is formed on the upper holding jig and the lower holding jig, respectively. It consists of a substantially C-shaped part to be sandwiched.

  According to the workpiece holding device of the present invention described in claim 9, the butt interface is obtained by sandwiching the cylinder by the substantially C-shaped portions respectively formed on the upper holding jig and the lower holding jig. It is possible to improve the bonding quality by laser welding by eliminating gaps generated in the above.

  A workpiece holding apparatus according to a tenth aspect of the present invention is the workpiece holding apparatus according to any one of the first and seventh to ninth aspects, wherein the one end and the other end. A laser beam is irradiated and welded to the end, and a holding hole on the side irradiated with the laser beam is formed with a through hole through which the laser beam passes.

  According to the workpiece holding device of the present invention described in claim 10, since the holding jig on the side irradiated with the laser beam has a through hole through which the laser beam passes, welding is performed. The holding jig does not get in the way.

  The workpiece holding device of the present invention described in claim 11 is the workpiece holding device according to claim 1, wherein the holding means includes a vertical movement member that moves in the vertical direction, It has a holding member which holds the cylinder by moving in the direction, and a movement direction conversion member which moves the holding member in accordance with the movement of the vertical movement member.

  According to the workpiece holding device of the present invention described in claim 11, the vertical movement member that moves in the vertical direction, the holding member that holds the cylinder by moving in the horizontal direction, and the vertical movement member In order to hold the cylinder by bringing one end bent to the cylinder into contact with the other end by the moving direction conversion member that moves the holding member as the lens moves, for example, one end And the other end can be brought into pressure contact with each other to join the butt interface, and the gap generated at the butt interface or the like can be eliminated to improve the joining quality by laser welding.

  A workpiece holding apparatus according to a twelfth aspect of the present invention is the workpiece holding apparatus according to the eleventh aspect, in which the vertical direction moving member is in the direction of the holding member. The holding member is provided with an inclined portion that can move in a direction in which the holding member is sandwiched by moving the cylindrical member.

  According to the workpiece holding device of the present invention described in claim 12, the vertical movement member moves in the holding member direction so that the holding member can move in the direction of sandwiching the cylindrical body. Defects such as scratching the tubular body when the holding jig is removed do not occur, and deterioration in quality can be suppressed.

  A workpiece holding apparatus according to a thirteenth aspect of the present invention is the workpiece holding apparatus according to any one of the first, eleventh and twelfth aspects, wherein the one end and the other end. A laser beam is irradiated and welded to the end, and a holding hole on the side irradiated with the laser beam is formed with a through hole through which the laser beam passes.

  According to the workpiece holding device of the present invention as set forth in claim 13, since the through hole through which the laser beam passes is formed in the holding jig on the side irradiated with the laser beam, welding is performed. The holding jig does not get in the way.

  Thus, according to the workpiece holding apparatus of this invention, the workpiece holding apparatus which can aim at the improvement of welding quality can be provided.

It is a figure showing a schematic structure figure of a terminal manufacture device concerning an embodiment of the present invention. It is a schematic diagram which shows the manufacture process of the chain terminal which concerns on embodiment of this invention. It is a perspective view which shows the external appearance structure of the chain terminal which concerns on embodiment of this invention. It is a block diagram of the terminal manufacturing apparatus which concerns on embodiment of this invention. It is a figure for demonstrating the press-contact by the to-be-processed target object holding | maintenance apparatus which concerns on embodiment of this invention. It is the figure which showed typically the to-be-processed target object holding | maintenance apparatus which concerns on 1st Embodiment of this invention. It is the figure which showed typically the upper clamp jig | tool of the workpiece holding device which concerns on 2nd Embodiment of this invention. It is the figure which showed typically the lower clamp jig | tool of the workpiece holding apparatus which concerns on 2nd Embodiment of this invention. It is the figure which showed the modification of the upper clamp jig | tool and lower clamp jig | tool of the workpiece holding device which concerns on 2nd Embodiment of this invention. It is the figure which showed typically the to-be-processed target object holding | maintenance apparatus which concerns on 3rd Embodiment of this invention. It is the figure which showed typically the modification of the to-be-processed target object holding | maintenance apparatus which concerns on 3rd Embodiment of this invention. It is the figure which showed typically the to-be-processed target object holding | maintenance apparatus which concerns on 4th Embodiment of this invention.

[1. First Embodiment]
Hereinafter, a workpiece holding device according to an embodiment of the present invention will be described with reference to the drawings. First, a terminal manufacturing apparatus that manufactures a workpiece to be held by the workpiece holding apparatus according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  In addition, FIG. 1 is a figure which shows the outline of the terminal manufacturing apparatus which concerns on embodiment of this invention. FIG. 2A to FIG. 2D are diagrams showing a crimp terminal manufacturing process according to an embodiment of the present invention. FIG. 3 is a view showing a crimp terminal according to an embodiment of the present invention. FIG. 4 is a diagram showing the configuration of the terminal manufacturing apparatus according to the embodiment of the present invention.

  Hereinafter, in the embodiment of the present invention, a case will be described in which the workpiece to be processed held by the workpiece holding device is a chain terminal obtained by bending a wire connection portion (crimp portion) into a cylindrical shape by press molding. .

[1-1. Constitution]
First, the configuration of a terminal manufacturing apparatus that manufactures a workpiece to be held by the workpiece holding apparatus according to the embodiment of the present invention will be described. As shown in FIG. 1, the terminal manufacturing apparatus 1 includes an unwinding roll 10, a press machine 20, a laser welding machine 30, a laser workability inspection machine 40, a winding from the upstream side in the feed direction on the left side in the drawing. A roll 50 and a control device 60 that controls these operations are provided.

  That is, conventionally, the press machine 20 and the laser welding machine 30 are carried out as separate processes. After the workpiece to be press-molded is wound once in a roll shape, the next process (previously, resin sealing) The process was carried out to the next step by unwinding from the roll again. On the other hand, the terminal manufacturing apparatus 1 according to the embodiment of the present invention performs press molding and the subsequent steps (laser welding in the present embodiment) as a series of steps.

  From the above, in the embodiment of the present invention, the laser workability inspection machine 40 is not an essential configuration. In the embodiment of the present invention, an example in which the press machine 20 and the laser welding machine 30 are provided as separate bodies is shown. However, in the embodiment of the present invention, these are integrated, that is, the press machine 20 is provided with a laser. Embodiments incorporating the welder 30 are also included.

  Furthermore, for convenience of explanation, an example is shown in which the laser welder 30 and the laser workability inspection machine 40 are configured as separate devices, but the function of the laser workability inspection machine 40 is included in the laser welder 30. Incorporating embodiments are also included.

  Next, each structure of the terminal manufacturing apparatus 1 is demonstrated. The unwinding roll 10 is a mechanism that unwinds and supplies the copper strip CS, which is a workpiece to be processed, wound in a roll shape at a predetermined speed. The unwinding roll 10 continuously feeds the copper strip CS from the roll at a speed mainly considering the press processing timing in the press machine 20.

  In the embodiment of the present invention, a plate material made of a copper alloy is used as the copper strip CS. 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 the embodiment of the present invention, the plate thickness of the workpiece is 0.25 mm or 0.32 mm, but it goes without saying that the plate thickness is not limited to these.

  As will be described later, in the press machine 20, the copper strip CS is intermittently conveyed in accordance with the timing of the press work. Therefore, as shown in FIG. 1, between the unwinding roll 10 and the press machine 20, a certain slack is given to the copper strip CS so as to absorb the difference in the conveyance timing between the intermittent conveyance and the continuous conveyance. ing.

  The press machine 20 is a device that forms a chain terminal T by performing press molding such as punching or bending while intermittently transporting the copper strip CS supplied from the unwinding roll 10 by a feed mechanism (not shown). .

  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 T1 shown is formed.

  The chain terminal T1 is formed with carrier portions C1 and C2 for conveying the chain terminal T1 in the feed direction in the press machine 20 up and down. The carrier portions C1 and C2 are provided with a plurality of holes H (in this case, one at a time corresponding to the position of the chain terminal T) at predetermined pitches in order to perform positioning during transport. Yes.

  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. ing.

  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. In addition, you may make the shape of a crimping | compression-bonding part into a level | step difference pipe structure by a bending process.

  The laser welding machine 30 is an apparatus that joins the butt interface Tc formed in the bent portion of the chain terminal T1 by laser welding to form an electric wire connection portion. Specifically, as shown in the perspective view of FIG. 3, the butt interface Tc formed in the axial direction at the upper end portion of the crimped portion Ta that is bent into a cylindrical shape in the terminal T is represented by a laser. Weld.

  Further, the connecting portion of the crimping portion Ta with the connector portion Tb is crushed to form a connecting portion Tc, and laser welding is performed on this portion to suppress intrusion of water into the conductor portion, and sealing is performed. Here, an example is used in which the bent portion of the chain terminal T is abutted, but in this embodiment, even when the bent portions are overlapped, they can be joined by laser welding. Is possible.

  The laser workability inspection machine 40 is an apparatus for inspecting the workability of the chain terminal T that is laser-welded. Specifically, with respect to the welding condition at the butt interface Tc laser-welded by the laser welding machine 30, it is determined by an imaging means such as a CCD camera whether the positional deviation amount and the bead width in the axial direction of the welding position are within an allowable range. To do.

  In addition, in the conveyance path between the press machine 20 and the laser welding machine 30, the chain terminal T is conveyed with slack. Similarly, in the conveyance path between the laser welding machine 30 and the laser workability inspection machine 40, the chain terminal T is conveyed with slack.

  This is because the processing timing of the press machine 20 and the laser welding machine 30, and the laser welding machine 30 and the laser workability inspection machine 40 are shifted, and this is absorbed by the slack of the chain terminal T between the processes. is there.

  The winding roll 50 is a mechanism that winds the chain terminal T at the same speed as the unwinding roll 10. In the winding roll 50 as well as the unwinding roll 10, in the laser welding machine 30 or the laser workability inspection machine 40 in the previous process, the chain terminal T is intermittently synchronized with the timing of laser processing or inspection processing. As shown in FIG. 1, the chain terminal T has a certain slack between the winding roll 50 and the laser workability inspection machine 40, and as shown in FIG. 1, the conveyance timing between intermittent conveyance and continuous conveyance. To absorb the differences.

  Note that, as described above, for convenience of explanation, an example in which the laser welding machine 30 and the laser workability inspection machine 40 are separately configured as separate apparatuses is shown. It is also possible to incorporate the function of the machine 40. That is, it can be realized by providing an image inspection camera in the laser welding machine 30 on the downstream side where the laser processing unit 70 is provided and on the conveyance path of the chain terminal T.

  The control device 60 is mainly for controlling the operation of the laser welding machine 30 in order to perform press molding in the press machine 20 and laser processing in the laser welding machine 30 as a series of steps.

[1-2. Specific configuration of laser welding machine and control device]
As described above, as a specific configuration of the laser welding machine 30 and the control device 60 for performing the press molding in the press machine 20 and the laser processing in the laser welding machine 30 as a series of steps, as shown in FIG. The configuration is as follows.

  First, the laser welding machine 30 includes a laser light source 71, a laser irradiation optical device 72, and a feed positioning mechanism 80 as a laser processing unit 70.

  The laser light source 71 is a known fiber laser, and oscillates a laser beam having a wavelength in the near-infrared region using a quartz optical fiber doped with a rare earth element as a laser medium. 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. Further, instead of fiber laser welding, a laser beam such as a YAG laser, a semiconductor laser, or a disk laser, or an electron beam may be used. The laser irradiation optical device 72 is an optical device for guiding the laser light output from the laser light source 71 to the crimp terminal ST. In this embodiment, a galvano scanner is used.

  The feed positioning mechanism 80 feeds the chain terminal T intermittently at a constant pitch corresponding to the interval L between the crimp terminals ST arranged on the chain terminal T, or by feeding at a predetermined speed. A mechanism for sequentially supplying the terminals ST to the welding position is provided.

  In the laser welding machine 30 of the present embodiment, as described above, the crimping portion Ta not only joins the abutting interface Tc that abuts both ends of the plate material bent into a cylindrical shape by laser welding or the like, but also the connector portion Tb. It is also possible to form an overlapped portion formed by crushing a plate material bent into a cylindrical shape at the end on the side, and this overlapped portion is laser welded to form the sealing portion Td. Specifically, the sealing portion Td is formed by welding in the terminal width direction an intermediate portion in the longitudinal direction of an overlapped portion in which two plate members are apparently overlapped by bending one plate member.

  The laser light source 71 is not limited to the case of using the fiber laser as described above, and a laser processing head is used, and the laser processing head itself is moved in the XY directions (horizontal directions) to sweep the laser light LB. It is also possible to do.

  The control device 60 includes press time detection means 61, positioning processing time calculation means 62, feed positioning time setting means 63, and processing condition setting means 64.

  The press time detecting means 61 detects the time required for one step of punching or bending the chain terminals T in the press machine 20.

  The positioning processing time calculation means 62 is configured such that the feed positioning mechanism 80 feeds one chain terminal T to the welding position, performs laser welding on the chain terminal T, and determines the chain terminal T to be welded next after the laser welding is completed. A means for calculating an index time (the sum of the conveyance time and the positioning time) until the welding processing position is transferred and positioned, and a time required for laser welding of one chain terminal T (hereinafter simply referred to as “laser processing time”). is there.

  The above example shows an example in which the crimp terminals ST transported to the welding processing position are transported one by one, but here, a plurality of crimp terminals ST are fed and positioned, and the plurality of crimp terminals ST. It is also possible to perform a welding process on the terminals collectively.

  The feed positioning time setting means 64 is a means for setting the calculated feed positioning time for the feed positioning mechanism 80. The feed positioning mechanism 80 is controlled based on the set time. Further, the processing condition setting means 65 is a means for inputting the laser processing time to the laser welding machine 30. The laser welding machine 30 is controlled based on this set time.

[1-3. Configuration of clamping device]
Next, with reference to FIG.5 and FIG.6, the to-be-processed object holding | maintenance apparatus (henceforth a clamp apparatus) which concerns on 1st Embodiment of this invention is demonstrated. The clamping device according to the first embodiment of the present invention holds the chain terminal T2 when the butt interface Tc of the chain terminal T2 (see FIG. 2C) is joined by laser welding in the laser welding machine 30 described above. Device.

  FIG. 5A is a view for explaining the spring back of the crimping portion of the chain terminal according to the first embodiment of the present invention. FIG.5 (b) is a figure for demonstrating the press-contact of the butt | matching interface of the chain terminal by the clamp apparatus based on 1st Embodiment of this invention.

  Moreover, Fig.6 (a) and FIG.6 (b) are figures which show the state before pinching a crimping | compression-bonding part with the clamp apparatus which concerns on 1st Embodiment of this invention. FIG.6 (c) is a figure which shows the state which press-contacted the butt | matching interface of the crimping | compression-bonding part with the clamp apparatus which concerns on 1st Embodiment of this invention.

  First, with reference to FIG. 5A and FIG. 5B, the pressure contact of the butt interface Tc of the chain terminal T2 by the clamping device according to the first embodiment of the present invention will be described. As shown in FIG. 5A, the above-described crimp portion Ta of the continuous terminal T2 is formed from a plate shape to a cylindrical shape by abutting one end portion Td and the other end portion Te by bending. A tubular body.

  For this reason, the crimping portion (tubular body) Ta formed in a cylindrical shape has a gap at the butt interface Tc due to a springback or the like in which the deformation returns in the direction of arrow A or arrow B due to the elasticity of the copper strip CS material itself. This gap may cause a deterioration in the bonding quality of the butt interface Tc during laser welding with the laser beam LB.

  Therefore, in order to suppress the generation of a gap at the butt interface Tc, in the embodiment of the present invention, as shown in FIG. 5B, the butt direction C and the butt between one end Td and the other end Te are used. By applying an external force to the crimping portion Ta from the direction D, one end portion Td and the other end portion Te are forcibly brought into pressure contact with each other.

  Next, with reference to FIG. 6A to FIG. 6C, a clamp device (workpiece holding device) for forcibly bringing one end Td into contact with the other end Te. explain. In the first embodiment of the present invention, the clamping device (workpiece holding device) 90 applies an external force to the crimping portion Ta from the butting direction C and the butting direction D to hold the crimping portion Ta, and one end portion Td. And the other end Te are forcibly pressed to eliminate the gap at the butt interface Tc.

  Specifically, the clamp device 90 includes a right clamp jig 91a and a left clamp jig 92b that sandwich the crimping portion Ta, an air chuck 92 that moves the right clamp jig 91a and the left clamp jig 92b, A vertical mechanism 93 that moves the chuck 92 up and down and a support body 94 that supports the air chuck 92 are substantially configured.

  When the clamping device 90 configured as described above is joined by laser welding to the butt interface Tc of the crimped portion Ta bent into a cylindrical shape, as shown in FIG. As shown, the support 94 is raised in the direction of arrow E by the vertical mechanism 93 to position the right clamp jig 91a and the left clamp jig 91b on the outer periphery of the crimping portion Ta.

  That is, by positioning the right clamp jig 91a and the left clamp jig 91b on the outer periphery of the crimping part Ta, the crimping part Ta is sandwiched between the right clamp jig 91a and the left clamp jig 91b and one end Td. And the other end Te can be pressed.

  Next, as shown in FIG. 6C, the right clamp jig 91a and the left clamp jig 91a and the left clamp jig 91a are moved by the air chuck 92 in the arrow C direction and the left clamp jig 91b in the arrow D direction. The jig 91b is brought into contact with the outer periphery of the crimping portion Ta.

  And the crimping | compression-bonding part Ta is hold | maintained by pinching from right and left with the right clamp jig | tool 91a and the left clamp jig | tool 91b, and one edge part Td and the other edge part Te are forcedly pressed.

  When one end Td and the other end Te are pressed together, the butt interface Tc is irradiated with the laser beam LB to laser weld the butt interface Tc. When this laser welding is finished, the air clamp 92 moves the right clamp jig 91a and the left clamp jig in the direction of arrow C or in the direction opposite to the arrow D direction, and is detached from the crimping portion Ta.

  Further, the support 94 is lowered in the direction opposite to the arrow E direction by the vertical mechanism 93, and the right clamp jig 91a and the left clamp jig 92b are returned to the positions shown in FIG. Then, as shown in FIGS. 6 (b) and 6 (c), the crimping portion Ta of the chain terminal T2 to be laser-welded next is sandwiched between the one end Td and the other end Te, By repeating the above, gaps at the butt interfaces Tc of the plurality of chain terminals T2 are eliminated.

[1-4. Effect]
The workpiece holding device (clamp device) 90 according to the first embodiment of the present invention as described above is a workpiece holding device that holds the shape of the workpiece (chain terminal T2), While a plate-like workpiece is bent into a cylindrical body, and one end Td and the other end Te of the bent cylindrical body are joined to form a tubular body (crimping section Ta) The holding means (the right clamp jig 91a and the left clamp jig 91b) that holds the cylindrical body by bringing one end Td and the other end Te into contact with each other is provided.

  Further, the workpiece holding device (clamp device) 90 according to the first embodiment of the present invention includes a pair of holding jigs (a right clamp jig 91a and a left clamp jig 91b) that sandwich the cylindrical body (chain terminal T2). ) And the one end Td and the other end Te are brought into contact with each other by sandwiching the cylinder from the side direction (arrow C direction and arrow D direction) of the cylinder with a pair of holding jigs.

  According to the workpiece holding device (clamp device) 90 according to the first embodiment of the present invention, while joining the butt interface Tc, the one end Td and the other end Te are brought into pressure contact with each other to form a tubular body. Since the (crimped part Ta) is held, the gap generated at the butt interface Tc can be eliminated, and the joining quality of the butt interface Tc by laser welding can be improved.

  In addition, since the gap generated at the butt interface Tc is eliminated by press-contacting the one end Td and the other end Te, the butt interface Tc can be welded regardless of the accuracy of press working.

  Further, since the crimping portion Ta is sandwiched from the lateral direction (arrow C direction and arrow D direction) by the right clamp jig 91a and the left clamp jig 91b, the crimp portion Ta is sandwiched by the right clamp jig 91a and the left clamp jig 91b. At the time of separation or separation, there is no occurrence of a defect such as breakage of the constricted portion connecting the carrier portion C1 (see FIG. 2D) and the crimping portion Ta. For this reason, the deterioration of the quality of chain terminal T (refer to Drawing 3) can be controlled.

[2. Second Embodiment]
[2-1. Configuration of clamping device]
Next, with reference to FIG.7 and FIG.8, the to-be-processed target object holding | maintenance apparatus (clamp apparatus) which concerns on 2nd Embodiment of this invention is demonstrated. In addition, since the clamp apparatus which concerns on 2nd Embodiment of this invention has a structure etc. substantially the same as the clamp apparatus which concerns on 1st Embodiment of this invention, description shall be abbreviate | omitted regarding the same structure. Moreover, the same code | symbol is attached | subjected and demonstrated to the component similar to the clamp apparatus which concerns on 1st Embodiment.

  In addition, Fig.7 (a) is a figure which shows the state before pressing down a crimping | compression-bonding part from the top with the clamp apparatus which concerns on 2nd Embodiment of this invention. FIG. 7B is a diagram showing a state in which the crimping unit is pressed from above and the butt interface is pressed by the clamping device according to the second embodiment of the present invention.

  Moreover, Fig.8 (a) is a figure which shows the state before pressing down a crimping | compression-bonding part from the bottom with the clamp apparatus which concerns on 2nd Embodiment of this invention. FIG. 8B is a diagram illustrating a state in which the crimping unit is pressed from below and the butt interface is pressed by the clamping device according to the second embodiment of the present invention.

  The clamping device according to the second embodiment of the present invention uses a laser at the butt interface Tc of the chain terminal T2 (see FIG. 2C) in the laser welding machine 30 described above, similarly to the clamping device according to the first embodiment. It is an apparatus for holding the chain terminal T2 when joining by welding.

  Then, by the clamping device according to the second embodiment of the present invention, an external force is applied to the crimping portion Ta from the butting direction C and the butting direction D (see FIG. 6C) between the one end Td and the other end Te. By applying, one end Td and the other end Te are forcibly brought into pressure contact.

  As shown in FIGS. 7A and 7B, the clamp device 290 according to the second embodiment of the present invention includes an upper clamp jig 291a movable in the direction of arrow F perpendicular to the abutting direction, The upper clamp recess 292a is formed on the clamp jig 291a and presses the crimping portion Ta, and the through hole 293 is formed in the upper clamp jig 291a.

  The upper clamp recess 292a is formed in a semicircular shape so that the upper clamp jig 291a can be sandwiched over the entire circumference of the crimping portion Ta when the crimping portion Ta is sandwiched between the upper clamp jig 291a.

  As shown in FIG. 7B, the clamp device 290 configured as described above is attached to the upper clamp jig 291a when joining the butt interface Tc of the crimped portion Ta bent into a cylindrical shape by laser welding. The formed upper clamp recess 292a is positioned on the outer periphery of the crimping portion Ta.

  That is, by moving the upper clamp jig 291a in the direction of the arrow F, the upper clamp recess 292a is positioned on the outer periphery of the crimp section Ta, and the upper clamp jig 291a and the above-described guide 21 hold down the crimp section Ta. Thus, one end Td and the other end Te can be pressed.

  Further, the upper clamp jig 291a is moved in the direction of the arrow F, and the crimp section Ta is held by the upper clamp jig 291a and the guide 21 to hold the crimp section Ta. The end portion Te is forcibly pressed.

  When one end Td and the other end Te are pressed together, the butt interface Tc is irradiated with the laser beam LB from the through-hole 293 to laser weld the butt interface Tc. When this laser welding is completed, the upper clamp jig 291a is moved in the direction opposite to the arrow F direction and is detached from the crimping portion Ta. Specifically, as shown in the cross-sectional view of FIG. 7C, the guide 21 has recesses 21a and 21b that enclose the carrier part C1 and the connector part Tb at both ends in the longitudinal direction of the chain terminal T, respectively. . The recesses 21a and 21b enclose the carrier part C1 and the connector part Tb, respectively, to prevent the chain terminal T from being lifted, and the upper clamp jig 291a is moved in the direction opposite to the arrow F direction to securely move from the crimping part Ta. You can leave.

  Then, the upper clamp jig 291a pushes in the crimping portion Ta of the chain terminal T2 to be laser-welded next, presses the one end portion Td and the other end portion Te, and repeats this, thereby repeating a plurality of chain terminals T2. The gap at the butt interface Tc of the crimping portion Ta is eliminated.

  Further, as shown in FIG. 8, a lower clamp jig 291 b may be used when pushing the crimping portion Ta. A lower clamp recess 292b is formed in the lower clamp jig 291b. The lower clamp recess 292b is formed in a semicircular shape so that the lower clamp jig 291b can be sandwiched over the half circumference of the crimping portion Ta when the crimping portion Ta is sandwiched therebetween.

  As shown in FIGS. 8A and 8B, when the butt interface Tc of the crimped portion Ta bent into a cylindrical shape is joined by laser welding, the lower clamp recess formed in the lower clamp jig 291b. 292b is positioned on the outer periphery of the crimping portion Ta.

  In other words, by moving the lower clamp jig 291b in the direction of arrow G, the lower clamp recess 292b is positioned on the outer periphery of the press bonding part Ta, and the lower clamp jig 291b and the guide 21 hold down the press bonding part Ta. The end portion Td and the other end portion Te can be pressed.

  Further, the lower clamp jig 291b is moved in the direction of the arrow G, and the crimp section Ta is held by the lower clamp jig 291b and the guide 21 to hold the crimp section Ta. The end portion Te is forcibly pressed. Specifically, as shown in the sectional view of FIG. 8C, the recesses 21a and 21b formed in the guide 21 wrap the carrier part C1 and the connector part Tb, respectively, to prevent the chain terminal T from being lifted. Thus, the lower clamp jig 291b can be moved in the direction of the arrow G to securely press the crimping portion Ta.

  When one end Td and the other end Te are pressed together, the butt interface Tc is irradiated with the laser beam LB to laser weld the butt interface Tc. When this laser welding is completed, the lower clamp jig 291b is moved in the direction opposite to the arrow G direction and detached from the crimping portion Ta. Specifically, as shown in the cross-sectional view of FIG. 8C, the guide 21 includes recesses 21a and 21b that enclose the carrier part C1 and the connector part Tb, respectively, and a lower clamp jig 291b on the surface of the crimping part Ta. A detachable gap 21c is formed. Since the guide 21 has a structure as shown in FIG. 8C, when the lower clamp jig 291b is detached from the crimping portion Ta, the continuous terminal T2 is pulled by the guide 21 in the direction opposite to the arrow G direction. The lower clamp jig 291b can be reliably detached from the crimping portion Ta.

  Then, the crimping portion Ta of the chain terminal T2 to be laser-welded next is pushed by the lower clamp jig 291b to press-contact one end Td and the other end Te, and by repeating this, a plurality of chain terminals T2 are pressed. The gap at the butt interface Tc of the crimping portion Ta is eliminated.

[2-2. Effect]
The workpiece holding device (clamp device) 290 according to the second embodiment of the present invention as described above is a workpiece holding device that holds the shape of the workpiece (chain terminal T2), While one end Td and the other end Te are joined by bending a plate-like workpiece into a cylindrical body to form a tubular body (crimped part Ta), one end Td and A holding means for holding the cylinder by contacting the other end Te is provided, and the holding means includes a holding jig (upper clamp jig 291a or lower clamp jig 291b) for sandwiching the cylinder, and a holding jig. Therefore, it has an external force direction conversion part (upper clamp recessed part 292a, lower clamp recessed part 292b) which converts the external force of the up-and-down direction concerning a cylinder into a horizontal direction, and it is a cylinder from the upper direction or the lower direction of a cylinder with a holding jig Vertical direction by external force direction conversion part by pinching the body External force is converted into force in the lateral direction (along arrows C and D in FIG. 5), it is brought into contact with one end portion Td and the other end portion Te.

  Further, the workpiece holding device (clamp device) 290 according to the second embodiment of the present invention has an external force direction changing portion formed on a holding jig (upper clamp jig 291a or lower clamp jig 291b). Consists of recesses (an upper clamp recess 292a and a lower clamp recess 292b) that sandwich the body, and the one end Td and the other end Te are brought into contact with each other by sandwiching the cylindrical body in the recess.

  Furthermore, in the workpiece holding device (clamp device) 290 according to the second embodiment of the present invention, one end portion Td and the other end portion Te are irradiated with a laser beam LB and welded to each other. A through hole 293 through which the laser beam LB passes is formed in the holding jig (upper clamp jig 291a) on the side irradiated with the laser beam.

  According to the workpiece holding device (clamp device) 290 according to the second embodiment of the present invention, while joining the butt interface Tc, the one end Td and the other end Te are brought into pressure contact with each other to form a tubular body. In order to hold (crimp part Ta), the clearance gap which arises in the butt | matching interface Tc can be eliminated, and the joining quality of the butt | matching interface by laser welding can be improved.

  In addition, since the gap generated at the butt interface Tc is eliminated by press-contacting the one end Td and the other end Te, the butt interface Tc can be welded regardless of the accuracy of press working.

  Furthermore, since a through hole 293 is formed in the holding jig (upper clamp jig 291a) in the joining direction of the abutting interface Tc, the holding jig obstructs the irradiation of the laser beam LB to the abutting interface Tc. Never become.

  Further, since the upper clamping jig 291a or the lower clamping jig 291b and the guide 21 press the crimping portion Ta to force the one end portion Td and the other end portion Te into pressure contact, Even when the chain terminal T2 is bent in the direction of the arrow F or the arrow G shown in FIGS. 7 and 8 with respect to the carrier part C1, the bending is corrected by pressing the crimping part Ta, and the chain terminal T2 is fixed to the carrier part. It can be kept horizontal with respect to C1.

  Thus, according to the workpiece holding device (clamp device) 290 according to the second embodiment of the present invention, the bending of the chain terminal T2 with respect to the carrier portion C1 while eliminating the gap generated at the butt interface Tc. Can be corrected.

  The clamp device 290 includes an upper clamp jig 295a as shown in FIG. 9 (a), a substantially C-shaped part 296a formed on the upper clamp jig 295a to press the crimping part Ta, and an upper clamp jig. You may comprise from the through-hole 293 formed in 295a. When the crimping portion Ta is sandwiched by the upper clamp jig 295a, the substantially C-shaped portion 296a can be sandwiched while being in contact with the left and right two points (contact points 297L, 297R) of the crimping portion Ta. It is formed in an approximately C shape. Here, the angle θL at which the line connecting the contact point 297L and the center point of the crimping portion Ta and the line connecting the butt interface Tc and the center point of the crimping portion Ta intersect is set in a range of 0 <θL <90 degrees. It is preferable from the viewpoint of reliably eliminating the gap. Further, the angle θR at which the line connecting the contact point 297R and the center point of the crimping portion Ta and the line connecting the butt interface Tc and the center point of the crimping portion Ta intersect with each other is in the range of 0 <θR <90 degrees. It is preferable from the viewpoint of reliably eliminating the gap. The clamp device 290 configured as described above can also eliminate the gap generated at the butt interface Tc.

  Further, the clamping device 290 may be composed of a lower clamping jig 295b as shown in FIG. 9B and a substantially C-shaped part 296b formed on the lower clamping jig 295b and pressing the crimping part Ta. Good. The substantially C-shaped portion 296b is formed in a substantially C-shape so that when the crimping portion Ta is sandwiched by the lower clamp jig 295b, the crimping portion Ta can be sandwiched while being in contact with the left and right two points of the crimping portion Ta. Is formed. The clamp device 290 configured as described above can also eliminate the gap generated at the butt interface Tc.

[3. Third Embodiment]
[3-1. Configuration of clamping device]
Next, a workpiece holding device (clamp device) according to a third embodiment of the present invention will be described with reference to FIG. In addition, since the clamp apparatus which concerns on 3rd Embodiment of this invention has a structure substantially the same as the clamp apparatus which concerns on 1st Embodiment of this invention, description shall be abbreviate | omitted regarding the same structure. Moreover, the same code | symbol is attached | subjected and demonstrated to the component similar to the clamp apparatus which concerns on 1st Embodiment.

  In addition, Fig.10 (a) is a figure which shows the state before pinching a crimping | compression-bonding part with the clamp apparatus which concerns on 3rd Embodiment of this invention. FIG.10 (b) is a figure which shows the state which pinched | interposed the crimping | compression-bonding part with the clamp apparatus which concerns on 3rd Embodiment of this invention, and press-contacted the butt | matching interface.

  The clamping device according to the third embodiment of the present invention uses a laser at the butt interface Tc of the chain terminal T2 (see FIG. 2C) in the laser welding machine 30 described above, similarly to the clamping device according to the first embodiment. It is an apparatus for holding the chain terminal T2 when joining by welding.

  Then, by the clamping device according to the third embodiment of the present invention, external force is applied to the crimping portion Ta from the butting direction C and the butting direction D (see FIG. 6C) between the one end Td and the other end Te. By applying, one end Td and the other end Te are forcibly brought into pressure contact.

  As shown in FIGS. 10A and 10B, the clamp device 390 according to the third embodiment of the present invention includes an upper clamp jig 391a that can move in the direction of arrow F orthogonal to the butting direction, A lower clamp jig 391b movable in the direction of the arrow G perpendicular to the direction, an upper clamp recess 392a and a lower clamp recess 392b formed on the upper clamp jig 391a and the lower clamp jig 391b and pressing the crimping portion Ta, It is substantially composed of a through hole 393 formed in the upper clamp jig 391a.

  The upper clamp recess 392a and the lower clamp recess 392b are arranged so that they can be sandwiched over the entire circumference of the crimping portion Ta when the crimping portion Ta is sandwiched between the upper clamp jig 391a and the lower clamp jig 391b. It is formed in a circular shape.

  Further, the upper clamp recess 392a is formed in a semicircular shape slightly larger than the lower clamp recess 392b so that the lower clamp recess 392b becomes looser than the force for pressing the press part Ta when the press part Ta is pressed. .

  As shown in FIG. 10B, the clamp device 390 configured as described above is attached to the upper clamp jig 391a when joining the butt interface Tc of the crimped portion Ta bent into a cylindrical shape by laser welding. The formed upper clamp recess 392a and the lower clamp recess 392b formed in the lower clamp jig 391b are positioned on the outer periphery of the crimping portion Ta.

  That is, by moving the upper clamp jig 391a in the direction of arrow F and the lower clamp jig 391b in the direction of arrow G, the upper clamp recess 392a and the lower clamp recess 392b are positioned on the outer periphery of the crimping portion Ta. The clamping jig 391a and the lower clamping jig 391b press the crimping portion Ta so that the one end Td and the other end Te can be pressed.

  Further, by moving the upper clamp jig 391a in the direction of arrow F and the lower clamp jig 391b in the direction of arrow G, the upper clamp jig 391a and the lower clamp jig 391b are pressed into the crimping portion Ta. The crimping portion Ta is held, and one end portion Td and the other end portion Te are forcibly pressed.

  When one end Td and the other end Te are pressed together, the butt interface Tc is irradiated with the laser beam LB from the through hole 393 to laser-weld the butt interface Tc. When this laser welding is completed, the upper clamp jig 391a is moved in the direction opposite to the arrow F direction, and the lower clamp jig 391b is moved in the direction opposite to the arrow G direction to be detached from the crimping portion Ta.

  Then, with the upper clamp jig 391a and the lower clamp jig 391b, the crimping portion Ta of the chain terminal T2 to be laser-welded next is pushed in, the one end Td and the other end Te are pressed against each other, and this is repeated. This eliminates the gap at the butt interface Tc of the crimping portions Ta of the plurality of chain terminals T2.

[3-2. Effect]
The workpiece holding device (clamp device) 390 according to the third embodiment of the present invention as described above is a workpiece holding device that holds the shape of the workpiece (chain terminal T2), While one end Td and the other end Te are joined by bending a plate-like workpiece into a cylindrical body to form a tubular body (crimped part Ta), one end Td and A holding means for holding the cylinder by contacting the other end Te is provided, and the holding means includes a holding jig (upper clamp jig 391a or lower clamp jig 391b) for sandwiching the cylinder, and a holding jig. Therefore, the external force direction converting portion upper clamp recess 392a for converting the external force in the vertical direction (arrow F direction and arrow G direction in FIG. 10) to the left and right direction (arrow C direction and arrow D direction in FIG. 5), lower clamp A recess 392b, and a holding jig on the cylinder By external force direction converting unit by the direction and downward direction sandwich the cylindrical body to convert the external force in the vertical direction to the lateral direction of the external force, it is brought into contact with one end portion Td and the other end portion Te.

  Further, in the workpiece holding device (clamp device) 390 according to the third embodiment of the present invention, the holding jig is an upper holding jig (upper clamping jig) that sandwiches the cylindrical body (chain terminal T2) from above. 391a) and a lower holding jig (lower clamp jig 391b) for sandwiching the cylinder body from below, and the external force direction changing portions are respectively formed on the upper holding jig and the lower holding jig. The recesses (upper clamp recess 392a, lower clamp recess 392b) sandwiching the body, and the recess (upper clamp recess 392a) formed on the support side on which the cylindrical body is supported are from the other recess (lower clamp recess 392b). Is also formed large.

  Furthermore, in the workpiece holding device (clamp device) 390 according to the third embodiment of the present invention, one end portion Td and the other end portion Te are irradiated with a laser beam LB to be welded and bonded. The tool (upper clamp jig 391a) has a through hole 393 through which a laser beam LB for joining one end Td and the other end Te passes.

  According to the workpiece holding device (clamp device) 390 according to the third embodiment of the present invention, while joining the butt interface Tc, the one end Td and the other end Te are brought into pressure contact with each other to form a tubular body. In order to hold (crimp part Ta), the clearance gap which arises in the butt | matching interface Tc can be eliminated, and the joining quality of the butt | matching interface by laser welding can be improved.

  In addition, since the gap generated at the butt interface Tc is eliminated by press-contacting the one end Td and the other end Te, the butt interface Tc can be welded regardless of the accuracy of press working.

  Furthermore, since the crimping portion Ta is sandwiched over the entire circumference by the upper clamp recess 392a and the lower clamp recess 393a that sandwich the crimping portion Ta, the butt interface Tc does not exceed the butt interface Tc of the crimping portion Ta. The contact is forced and the gap is eliminated.

  Further, since the through hole 393 is formed in the holding jig (upper clamp jig 291a) in the joining direction of the abutting interface Tc, the holding jig interferes with the irradiation of the laser beam LB to the abutting interface Tc. Never become.

  Furthermore, since the upper clamping jig 391a and the lower clamping jig 391b hold down the crimping portion Ta, the stroke for moving the clamping jig is shortened, and the laser processing time including the step of pressing the butt interface Tc is increased. be able to.

  In addition, since the upper clamping jig 391a and the lower clamping jig 391b press the crimping portion Ta to force the one end portion Td and the other end portion Te into pressure contact with each other, the carrier portion is used during press molding or the like. Even when the chain terminal T2 (see FIG. 3) is bent in the direction of the arrow F or the arrow G with respect to C1, the bending is corrected by pressing the crimping portion Ta, and the chain terminal T2 is horizontal with respect to the carrier portion C1. Can be kept in.

  Further, since the upper clamp recess 392a is formed in a semicircular shape slightly larger than the lower clamp recess 392b, scratches caused by interference with the continuous terminal T2 when the upper clamp jig 391a is detached from the crimping portion Ta, etc. It is possible to suppress the deterioration of the quality of the chain terminal T2 due to the occurrence of.

  Further, when the lower clamp jig 391b is detached from the crimping portion Ta, the continuous terminal T2 suppresses the pulling force in the direction of arrow F by the guide 21, so that the lower clamp jig 391b is easily detached from the crimping portion Ta. .

  Thus, according to the workpiece holding device (clamp device) 390 according to the third embodiment of the present invention, the bending of the chain terminal T2 with respect to the carrier portion C1 while eliminating the gap generated at the butt interface Tc. Can be corrected. In addition, when detaching from the crimping portion Ta, it is possible to easily detach from the crimping portion Ta.

  In addition, you may employ | adopt the following structures as the to-be-processed target object holding | maintenance apparatus (clamp apparatus) 395 which concerns on the modification of 3rd Embodiment. That is, the clamp device 395 includes an upper clamp jig 396a, a substantially C-shaped portion 297a formed on the upper clamp jig 396a and pressing the crimping portion Ta, as shown in FIG. You may comprise from the through-hole 398 formed in the tool 396a, the lower clamp jig | tool 396ab, and the substantially C-shaped part 397b formed in the lower clamp jig | tool 396a, and pressing down the crimping | compression-bonding part Ta. As shown in FIG. 11 (b), the substantially C-shaped portions 397a and 367b are provided on the left and right sides of the crimping portion Ta when the crimping portion Ta is sandwiched between the upper clamping jig 396a and the lower clamping jig 396a, respectively. It is formed in a substantially C shape so that it can be sandwiched while abutting against the two points. The clamp device 395 configured as described above can also eliminate the gap generated at the butt interface Tc.

[4. Fourth Embodiment]
[4-1. Configuration of clamping device]
Next, a workpiece holding device (clamp device) according to a fourth embodiment of the present invention will be described with reference to FIG. In addition, since the clamp apparatus which concerns on 4th Embodiment of this invention has a structure substantially the same as the clamp apparatus which concerns on 1st Embodiment of this invention, description shall be abbreviate | omitted regarding the same structure. Moreover, the same code | symbol is attached | subjected and demonstrated to the component similar to the clamp apparatus which concerns on 1st Embodiment.

  In addition, Fig.12 (a) is a figure which shows the state before pinching a crimping | compression-bonding part with the clamp apparatus which concerns on 4th Embodiment of this invention. FIG. 12B is a view showing a state in which the crimping portion is sandwiched by the clamping device according to the fourth embodiment of the present invention and the butt interface is pressed.

  The clamping device according to the fourth embodiment of the present invention uses a laser at the butt interface Tc of the chain terminal T2 (see FIG. 2C) in the laser welding machine 30 described above, similarly to the clamping device according to the first embodiment. It is an apparatus for holding the chain terminal T2 when joining by welding.

  Then, by the clamping device according to the fourth embodiment of the present invention, external force is applied to the crimping portion Ta from the butting direction C and the butting direction D (see FIG. 6C) between the one end Td and the other end Te. By applying, one end Td and the other end Te are forcibly brought into pressure contact.

  As shown in FIGS. 12 (a) and 12 (b), a clamp device 490 according to a fourth embodiment of the present invention includes an upper clamp jig 491a movable in the direction of arrow F perpendicular to the butting direction, and a butting The lower clamp jig 491b that can move in the direction of the arrow G perpendicular to the direction, and a through hole 493 formed in the upper clamp jig 491a.

  The upper clamp jig 491a has a pair of fixing pieces 494a and 494b. The lower clamp jig 491b includes a pair of movable pieces 495a and 495b and elastic members 496a and 496b that can move the pair of movable pieces 495a and 495b in a predetermined direction by elastic deformation, respectively.

  The pair of fixed pieces 494a and 494b have fixed piece inclined portions 497a and 497b, and the pair of movable pieces 495a and 495b have movable piece inclined portions 498a and 498b. The fixed piece inclined portion 497a and the movable piece inclined portion 498a, and the fixed piece inclined portion 497b and the movable piece inclined portion 498b are formed so as to contact each other.

  The pair of fixed piece inclined portions 497a and 497b are arranged inwardly of the pair of movable piece inclined portions 498a and 498b when the upper clamp jig 491a is lowered in the arrow F direction (in the arrow C direction and the arrow D direction (FIG. 5 ( A predetermined inclination is formed so as to be movable to b) see)).

  Specifically, when the upper clamp jig 491a moves in the direction of arrow F, the pair of fixed piece inclined portions 497a and 497b come into contact with the pair of movable piece inclined portions 498a and 498b to move the movable pieces 495a and 495b. It is configured.

  In other words, the clamp device 490 has a mechanism that can change the vertical force caused by the lower clamp jig 491a descending into the lateral force of the movable pieces 495a and 495b.

  As shown in FIG. 12 (b), the clamp device 490 configured as described above has an upper clamp jig 491a and a butt interface Tc of the crimped portion Ta bent into a cylindrical shape. The lower clamp jig 491b is positioned on the outer periphery of the crimping portion Ta.

  That is, the upper clamp jig 491a and the lower clamp jig 491b are positioned on the outer periphery of the crimping portion Ta by moving the upper clamp jig 491a in the direction of arrow F and the lower clamp jig 491b in the direction of arrow G. The upper clamp jig 391a and the lower clamp jig 391b press the crimping portion Ta so that the one end Td and the other end Te can be pressed.

  When the lower clamp jig 491b is moved in the arrow G direction, the movable piece inclined portions 498a and 498b are brought into contact with the pressure-bonding portion Ta due to elastic deformation of the elastic members 496a and 496b.

  Further, the upper clamp jig 491a is moved in the direction of arrow F and the lower clamp jig 491b is moved in the direction of arrow G, and the upper clamp jig 491a and the lower clamp jig 491b are pressed into the crimping portion Ta. The crimping portion Ta is held, and one end portion Td and the other end portion Te are forcibly pressed.

  Further, when the upper clamp jig 491a is lowered in the direction of arrow F, the fixed piece inclined portions 497a and 497b are lowered along the inclination formed in the movable piece inclined portions 498a and 498b. Due to the elastic deformation, the movable pieces 495a and 495b move inward in the lateral direction (the direction of the arrow C and the direction of the arrow D (see FIG. 5B)) and press the crimping portion Ta.

  In this way, the upper clamp jig 491a is moved in the direction of arrow F, the lower clamp jig 491b is moved in the direction of arrow G, and the crimping portion Ta is pressed by the upper clamp jig 491a and the lower clamp jig 491b. The crimping portion Ta is held, and one end portion Td and the other end portion Te are forcibly pressed.

  When one end Td and the other end Te are pressed together, the butted interface Tc is irradiated with the laser beam LB from the through-hole 493 to laser weld the butted interface Tc. When this laser welding is completed, the upper clamp jig 491a is moved in the direction opposite to the arrow F direction, and the lower clamp jig 491b is moved in the direction opposite to the arrow G direction to be detached from the crimping portion Ta.

  As the upper clamp jig 491a is raised in the direction of arrow G, the fixed piece inclined portions 497a and 497b are raised along the inclination formed in the movable piece inclined portions 498a and 498b, so that the elastic members 496a and 496b are elastically deformed. As a result, the movable pieces 495a and 495b are moved outward (in the direction opposite to the arrow C direction and the arrow D direction (see FIG. 5B)) and detached from the crimping portion Ta.

  Then, with the upper clamp jig 491a and the lower clamp jig 491b, the crimping portion Ta of the chain terminal T2 to be laser-welded next is pushed in, the one end Td and the other end Te are pressed, and this is repeated. This eliminates the gap at the butt interface Tc of the crimping portions Ta of the plurality of chain terminals T2.

[4-2. Effect]
The workpiece holding device (clamp device) 490 according to the fourth embodiment of the present invention as described above is a workpiece holding device that holds the shape of the workpiece (chain terminal T2), While one end Td and the other end Te are joined by bending a plate-like workpiece into a cylindrical body to form a tubular body (crimped part Ta), one end Td and A holding unit that holds the cylindrical body in contact with the other end Te is provided, and the holding unit moves in a vertical direction (an arrow F direction and an arrow G direction). Lower clamp jig 491b), holding member (movable piece 495) that holds the cylinder by moving in the left-right direction (the direction of arrow C and arrow D in FIG. 5B), and the movement of the vertical movement member Movement direction conversion member (fixed piece 49) ) And it has a.

  In addition, the workpiece holding device (clamp device) 490 according to the fourth embodiment of the present invention includes a moving direction conversion unit (fixed piece 494), a vertical moving member (upper clamp jig 491a, lower clamp jig). 491b) moves in the holding member direction (arrow F direction and arrow G direction) so that the holding member (movable piece 495) can be moved in the direction of sandwiching the cylinder (the fixed piece inclined portion of the fixed piece 494). 497).

  Furthermore, in the workpiece holding device (clamp device) 490 according to the fourth embodiment of the present invention, one end portion Td and the other end portion Te are irradiated with a laser beam LB to be welded and joined. A through-hole 498 through which the laser beam LB passes is formed in the vertical movement member (upper clamp jig 491a) on the side irradiated with LB.

  According to the workpiece holding device (clamp device) 490 according to the fourth embodiment of the present invention, while joining the butt interface Tc, the one end Td and the other end Te are brought into pressure contact with each other to form a tubular body. In order to hold (crimp part Ta), the clearance gap which arises in the butt | matching interface Tc can be eliminated, and the joining quality of the butt | matching interface by laser welding can be improved.

  In addition, since the gap generated at the butt interface Tc is eliminated by press-contacting the one end Td and the other end Te, the butt interface Tc can be welded regardless of the accuracy of press working.

  Further, when the upper clamp jig 491a is lowered in the direction of the arrow F, the movable pieces 495a and 495b are moved inward in the horizontal direction (the direction of the arrow C and the direction of the arrow D (see FIG. 5 (b))). Therefore, it is not necessary for the upper clamp jig 491a to hold down the pressure-bonding portion Ta, and the upper clamp jig 491a is easily detached from the pressure-bonding portion Ta.

  Further, when the upper clamp jig 491a is detached from the crimping portion Ta, the fixed piece inclined portions 497a and 497b rise along the inclination formed in the movable piece inclined portions 498a and 498b, so that the elasticity of the elastic members 496a and 496b is increased. Due to the deformation, the movable pieces 495a and 495b move to the outside (the direction opposite to the arrow C direction and the arrow D direction (see FIG. 5B)), and no external force is applied to the chain terminal T2. The deterioration of the quality of chain terminal T2 by this can be suppressed.

  Furthermore, since the holding jig (upper clamp jig 491a) has a through hole 493 formed in the joining direction of the abutting interface Tc, the holding jig interferes with the irradiation of the laser beam LB to the abutting interface Tc. Never become.

  Further, since the upper clamp jig 491a and the lower clamp jig 491b hold down the crimping portion Ta to force the one end portion Td and the other end portion Te into pressure contact with each other, the carrier portion is used during press molding or the like. Even when the chain terminal T2 (see FIG. 3) is bent in the direction of the arrow F or the arrow G with respect to C1, the bending is corrected by pressing the crimping portion Ta, and the chain terminal T2 is horizontal with respect to the carrier portion C1. Can be kept in.

  Thus, according to the workpiece holding device (clamp device) 490 according to the fourth embodiment of the present invention, the bending of the chain terminal T2 with respect to the carrier portion C1 while eliminating the gap generated at the butt interface Tc. Can be corrected. In addition, when detaching from the crimping portion Ta, the detachment from the crimping portion Ta can be facilitated.

  As mentioned above, although the workpiece holding device of this invention was demonstrated based on embodiment of illustration, this invention is not limited to this, The structure of each part is the thing of arbitrary structures which have the same function Can be replaced.

  The workpiece holding device to which the present invention is applied is preferable in that a large number of terminals with stable welding quality can be manufactured even when there is no gap at the butt interface of the press-molded terminals. Specifically, when the terminal is continuously sent from the press machine to the laser welding machine at the time of manufacturing the terminal, the laser welding must be matched to the speed sent from the press machine. That is, it is required to fix the butt interface with very high positional accuracy even though the terminal flows at a very high speed. In this respect, the workpiece holding device to which the present invention is applied can fix the butt interface Tc of the terminal flowing at high speed with high accuracy, so whether or not a gap is generated at the butt interface of the press-molded terminal. Therefore, a large number of terminals with stable welding quality can be manufactured.

  Moreover, although this embodiment demonstrated the case where the butt | matching interface Tc which can be made into the bent part of the chain terminal T1 was joined by laser welding, it is not limited to this, Even if it is another welding method and joining method Good.

  Moreover, although this embodiment demonstrated the case where the butt | matching interface which made one end part and the other end part press-contact with the clamp apparatuses 90, 290, 390, 395, and 490 was welded, it is not limited to this. For example, not only the butt interface but also one end may be held and welded by the clamping devices 90, 290, 390, 395, and 490 so as to overlap the other end.

  As mentioned above, even if it replaces with the thing of arbitrary composition which has the same function, the same operation effect as clamp devices 90, 290, 390, 395, and 490 concerning the embodiment of the present invention can be acquired.

DESCRIPTION OF SYMBOLS 1 Terminal manufacturing apparatus 20 Press machine 30 Laser welding machine 40 Laser workability inspection machine 50 Winding roll 60 Control apparatus 70 Laser processing part 80 Feed positioning mechanism 90 Clamp apparatus (1st Embodiment)
91a Right clamp jig (first embodiment)
91b Left clamp jig (first embodiment)
290 Clamp device (second embodiment)
291a Upper clamp jig (second embodiment)
291b Lower clamp jig (second embodiment)
292a Upper clamp recess (second embodiment)
292b Lower clamp recess (second embodiment)
293 Through hole (second embodiment)
390 Clamp Device (Third Embodiment)
395 Clamp device (third embodiment)
391a Upper clamp jig (third embodiment)
396a Upper clamp jig (third embodiment)
391b Lower clamp jig (third embodiment)
396b Lower clamp jig (third embodiment)
392a Upper clamp recess (third embodiment)
397a Upper clamp recess (third embodiment)
392b Lower clamp recess (third embodiment)
397b Lower clamp recess (third embodiment)
393 Through hole (third embodiment)
398 Through hole (third embodiment)
490 Clamp device (fourth embodiment)
491a Upper clamp jig (fourth embodiment)
491b Lower clamp jig (fourth embodiment)
492a Upper clamp recess (fourth embodiment)
492b Lower clamp recess (fourth embodiment)
493 Through hole (fourth embodiment)
494 Fixed piece (fourth embodiment)
495 Movable piece (fourth embodiment)
496 Elastic member (fourth embodiment)
497 Fixed piece inclined portion (fourth embodiment)
498 Fixed piece inclined portion (fourth embodiment)

In order to achieve the above object, a workpiece holding device of the present invention described in claim 1 of the present invention is a workpiece holding device that holds the shape of a workpiece, and is a plate-like workpiece. While bending an object into a cylindrical body and joining one end and the other end of the bent cylindrical body to form a tubular body, the one end and the other end Holding means for holding the shape of the cylindrical body having a butt interface , wherein the holding means has a holding jig for sandwiching the cylindrical body, and the holding jig is provided on the left side and the right side of the cylindrical body. A substantially C-shaped part that contacts the two points, a line connecting a point where the approximately C-shaped part contacts the cylinder and a center point of the cylinder, the butt interface, and the cylinder and a line connecting the center point intersecting angle, a 90 ° less than der make a marked than 0 ° Features.

According to the workpiece holding device of the present invention as set forth in claim 1, since it is brought into contact with the one end portion which is bent into a cylindrical body and the other end holding the cylindrical body, the one The end part and the other end part can be brought into pressure contact to join the butt interface, and the gap generated at the butt interface or the like can be eliminated to improve the joint quality by laser welding.

In addition, by holding one end and the other end in contact with each other, for example, to eliminate a gap generated at the butt interface, etc., the butt interface is welded without being limited by the accuracy of the press work. Can do.
Furthermore, since the cylindrical body is sandwiched between the substantially C-shaped portions formed on the holding jig, it is possible to make one end and the other end abut on each other to perform welding and the like, thereby suppressing deterioration in quality. it can.

A workpiece holding apparatus of the present invention described in claim 2 is the object to be processed holding device according to claim 1, wherein the holding jig, the cylindrical body from above of the cylindrical body upper and holding jig has a lower retaining jig to sandwich the cylindrical body from the lower side of the cylindrical body, the respective upper retaining jig and the lower holding jig the generally c-shaped portion sandwiching wherein the but has been formed.

According to the workpiece holding device of the present invention described in claim 2 , the butt interface is obtained by sandwiching the cylinder by the substantially C-shaped portions respectively formed on the upper holding jig and the lower holding jig. It is possible to improve the bonding quality by laser welding by eliminating gaps generated in the above.

A workpiece holding device according to a third aspect of the present invention is the workpiece holding device according to any one of claims 1 to 3 , wherein the one end and the other end. The part is irradiated with laser light and welded, and the holding jig on the side irradiated with the laser light is formed with a through hole through which the laser light passes.

According to the workpiece holding device of the present invention described in claim 3 , since the through hole through which the laser beam passes is formed in the holding jig on the side irradiated with the laser beam, welding is performed. The holding jig does not get in the way.

The workpiece holding device of the present invention described in claim 4 is a workpiece holding device for holding the shape of the workpiece, and bending the plate-like workpiece into a cylindrical body. The one end and the other end are brought into contact with each other while the one end and the other end of the bent cylinder are joined to form a tubular body. Holding means for holding the vertical movement member that moves in the vertical direction, a holding member that holds the cylindrical body by moving in the horizontal direction, and the movement of the vertical movement member A moving direction changing member for moving the holding member.

According to the workpiece holding device of the present invention described in claim 4 , the vertical movement member that moves in the vertical direction, the holding member that holds the cylinder by moving in the horizontal direction, and the vertical movement member to the the movement direction conversion member for moving the holding member with the movement of abut the one end portion which is bent into the cylindrical body and the other end to hold the cylindrical body, one end and the other It is possible to join the abutting interface by pressure-contacting with the end portion of the metal, and it is possible to eliminate the gap generated at the abutting interface and improve the joining quality by laser welding.

A workpiece holding device according to a fifth aspect of the present invention is the workpiece holding device according to the fourth aspect , wherein the moving direction conversion unit is configured so that the vertical moving member is in the holding member direction. The holding member is provided with an inclined portion that can move in a direction in which the holding member is sandwiched by moving the cylindrical member.

According to the workpiece holding device of the present invention described in claim 5 , the vertical movement member moves in the holding member direction so that the holding member can move in the direction of sandwiching the cylindrical body. Defects such as scratching the tubular body when the holding jig is removed do not occur, and deterioration in quality can be suppressed.

The workpiece holding device of the present invention described in claim 6 is the workpiece holding device according to claim 4 or 5 , wherein the one end and the other end are laser beams. Is irradiated and welded, and the holding jig on the side irradiated with the laser beam has a through-hole through which the laser beam passes.

According to the workpiece holding device of the present invention described in claim 6 , since the through hole through which the laser beam passes is formed in the holding jig on the side irradiated with the laser beam, welding is performed. The holding jig does not get in the way.

In order to achieve the above object, a workpiece holding device of the present invention described in claim 1 of the present invention is a workpiece holding device that holds the shape of a workpiece, and is a plate-like workpiece. While bending an object into a cylindrical body and joining one end and the other end of the bent cylindrical body to form a tubular body, the one end and the other end Holding means for holding the cylinder body, wherein the holding means is a vertical movement member that moves in a vertical direction, a holding member that holds the cylinder body by moving in a horizontal direction, And a movement direction conversion member that moves the holding member in accordance with the movement of the vertical movement member.

According to the workpiece holding device of the present invention described in claim 1 , the vertical movement member that moves in the vertical direction, the holding member that holds the cylindrical body by moving in the horizontal direction, and the vertical movement member The one end and the other end are held in contact with one end and the other end which are bent into the cylinder by the moving direction changing member that moves the holding member along with the movement of the one end and the other. It is possible to join the abutting interface by pressure-contacting with the end portion of the metal, and it is possible to eliminate the gap generated at the abutting interface and improve the joining quality by laser welding.

The workpiece holding device of the present invention described in claim 2 is the workpiece holding device according to claim 1 , wherein the moving direction conversion unit is configured such that the vertical moving member is in the holding member direction. The holding member is provided with an inclined portion that can move in a direction in which the holding member is sandwiched by moving the cylindrical member.

According to the workpiece holding device of the present invention described in claim 2 , the vertical movement member moves in the holding member direction so that the holding member can move in the direction of sandwiching the cylindrical body. Defects such as scratching the tubular body when the holding jig is removed do not occur, and deterioration in quality can be suppressed.

A workpiece holding device of the present invention described in claim 3 is the workpiece holding device according to claim 1 or 2 , wherein the one end and the other end are laser beams. Is irradiated and welded, and the holding jig on the side irradiated with the laser beam has a through-hole through which the laser beam passes.

According to the workpiece holding device of the present invention described in claim 3 , since the through hole through which the laser beam passes is formed in the holding jig on the side irradiated with the laser beam, welding is performed. The holding jig does not get in the way.

Claims (13)

A workpiece holding device that holds the shape of a workpiece,
While bending a plate-like workpiece into a cylinder and joining one end and the other end of the bent cylinder to form a tubular body, the one end and A workpiece holding device, comprising: holding means for holding the cylindrical body in contact with the other end portion. The holding means has a pair of holding jigs that sandwich the cylindrical body,
2. The workpiece according to claim 1, wherein the one end and the other end are brought into contact with each other by sandwiching the cylinder from the side of the cylinder with the pair of holding jigs. Object holding device. The holding means includes a holding jig for sandwiching the cylindrical body,
An external force direction converting portion that converts an external force in the vertical direction applied to the cylinder by the holding jig into the left and right direction;
By sandwiching the cylinder from above or below the cylinder with the holding jig, the external force direction conversion section converts the external force in the vertical direction into the external force in the left-right direction, and the one end and the one end The workpiece holding device according to claim 1, wherein the other end is brought into contact with the workpiece. The external force direction changing portion is formed of a concave portion formed on the holding jig and sandwiching the cylindrical body,
4. The workpiece holding device according to claim 3, wherein the one end and the other end are brought into contact with each other when the cylindrical body is sandwiched in the recess. The external force direction changing part is formed of a substantially C-shaped part formed on the holding jig and sandwiching the cylindrical body,
4. The one end portion and the other end portion are brought into contact with each other by sandwiching the substantially C-shaped portion while being in contact with two points on the left side and the right side of the cylindrical body. The workpiece holding apparatus as described. The one end and the other end are welded by being irradiated with laser light,
6. The workpiece according to claim 1, wherein a through-hole through which the laser beam passes is formed in the holding jig on the side irradiated with the laser beam. Object holding device. The holding means includes a holding jig for sandwiching the cylindrical body,
An external force direction converting portion that converts an external force in the vertical direction applied to the cylinder by the holding jig into the left and right direction;
By sandwiching the cylinder from above and below the cylinder with the holding jig, the external force direction conversion unit converts the external force in the vertical direction into the external force in the horizontal direction, and the one end and the one end The workpiece holding device according to claim 1, wherein the other end is brought into contact with the workpiece. The holding jig includes an upper holding jig that sandwiches the cylinder body from the upper direction, and a lower holding jig that sandwiches the cylinder body from the lower direction,
The external force direction changing portion is formed of a recess that is formed in each of the upper holding jig and the lower holding jig and sandwiches the cylindrical body,
The workpiece holding device according to claim 7, wherein the concave portion formed on the support side on which the cylindrical body is supported is formed larger than the other concave portion. The holding jig includes an upper holding jig that sandwiches the cylinder body from the upper direction, and a lower holding jig that sandwiches the cylinder body from the lower direction,
8. The workpiece holding unit according to claim 7, wherein the external force direction changing part is formed of a substantially C-shaped part formed on each of the upper holding jig and the lower holding jig and sandwiching the cylinder. apparatus. The one end and the other end are welded by being irradiated with laser light,
The through hole through which the laser beam for joining said one edge part and said other edge part passes is formed in the said holding jig, The any one of Claim 1, 7 to 9 characterized by the above-mentioned. The workpiece holding device according to claim 1. The holding means includes a vertical movement member that moves in the vertical direction;
A holding member that holds the cylindrical body by moving in the left-right direction;
The workpiece holding device according to claim 1, further comprising a movement direction conversion member that moves the holding member in accordance with the movement of the vertical movement member.   The said moving direction conversion part is provided with the inclination part which enables the said holding member to move to the direction which pinches | interposes the said cylinder, when the said up-down direction moving member moves to the said holding member direction. The workpiece holding device according to 11. The one end and the other end are welded by being irradiated with laser light,
13. The object according to claim 1, wherein a through-hole through which the laser light passes is formed in the vertically moving member on the side irradiated with the laser light. Processing object holding device.

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