JP2016046077A - Terminal manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal forming apparatus having a proper suction device that can suck and remove dust materials occurring from a welding part when laser welding is applied to a crimp portion to form the welding part in a laser welder.SOLUTION: A terminal manufacturing apparatus of the present invention has a press machine for subjecting a sequentially supplied belt-like processing target plate member to at least punching processing, bending processing of bending the belt-like processing target plate member in a cylindrical shape so that two edge portions approach to each other to form a crimp portion, and collapse processing of crushing one end portion of the crimp portion to form a stack portion and closing the opening of the one end portion, thereby forming a chain terminal in which plural crimp terminals each having a crimp portion Ta-2 are chained at a fixed interval, a laser welder 30 for applying laser welding to the two edge portions and the stack portion of the crimp portion Ta-2 to form first and second welded portions Te, Td in the crimp portion Ta-2, and dust collecting means 70 for sucking and removing dust materials occurring from the first and second welded portions Te, Td due to welding of the laser welder 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a terminal manufacturing apparatus capable of continuously manufacturing a plurality of crimp terminals from a strip-shaped plate material.

  A large number of wire harnesses are 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 “crimp terminal”) having a crimping portion that can be crimped is crimped to the end of each covered electric wire. When connecting the crimp terminal to the wire end of the wire harness, peel off the insulation coating layer of the wire end to expose the core wire, and crimp the core wire barrel of the crimp terminal to the core wire exposed part to crimp the wire end. Electrical connection with the terminal is made. And the connection part of a crimp terminal and an electric wire terminal is resin-sealed in order to prevent the corrosion of the core wire by the penetration | invasion of the water | moisture content from the connection part with a crimp terminal in the inside of an electric wire (for example, refer patent documents 1 and 2). .

  In addition, such a crimp terminal is, for example, punching or bending using a press machine with respect to a strip-shaped processed plate material, for example, a copper strip, supplied from a state of being wound in a roll shape, etc. Press molding is performed. In this press molding, a chain-like chain terminal connected by a carrier held by a transport mechanism for transporting a copper strip in a press machine is formed. Then, this chain terminal is wound up again in a roll shape, and this time, in the resin sealing device, it is common that the connection portion between the crimp terminal formed in the terminal shape and the wire terminal is resin-sealed. .

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

  Therefore, a press machine is used to form a crimped portion of the crimp terminal by bending the processed plate material into a hollow shape so that the two edges are close to each other, and the butt interface between the two edges of the crimped portion Attempts have been made to make the electrical connection portion between the crimp terminal and the wire terminal into a sealed structure by joining the whole by laser welding or the like (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 2001-167821 JP2012-0669449 International Publication No. 2014/010605

  As a method for manufacturing such a crimp terminal, there is a method in which a chain terminal formed by a press machine is wound once in laser welding in the next process and moved to the next process. The take-up work not only increases the work process, but also assumes that the terminal is deformed during winding, and the crimp terminal deviates from the normal positional relationship such as horizontal or vertical with respect to the carrier. In addition to deteriorating the quality of laser welding in the next step, there was a problem that a sufficient production speed could not be obtained.

  Therefore, in order to improve the manufacturing speed of crimp terminals, a press machine and a laser welding machine are arranged on the continuous production line, and after processing with the press machine, the next process laser is not taken up without winding up the formed chain terminals. The development of a terminal manufacturing apparatus that employs a structure that continuously conveys to a welding machine has recently been carried out.

  By the way, when laser welding is performed with a laser welding machine, dust materials such as spatter, which is metal scattered matter (fine particles), and dust, which is caused by fumes, which are metal vapor, are usually generated from the weld due to laser welding. It is known to do.

  Further, in a terminal manufacturing apparatus having a configuration in which a press machine and a laser welding machine are arranged on a continuous manufacturing line, dust substances generated by laser welding are not only scattered and accumulated in the laser welding machine but also the same continuous It is assumed that they are scattered (floating) and deposited (attached) to the peripheral equipment constituting the terminal manufacturing apparatus on the manufacturing line.

  In addition, if the dust material is scattered and accumulated throughout the terminal manufacturing apparatus in this way, there is a possibility that the chain terminal cannot be accurately conveyed or positioned, and the chain terminal is configured before laser welding. If dust material accumulates on the surface of the crimp terminal (following), it is assumed that welding failure may occur, and if dust material adheres to the connector part of the crimp terminal, etc., electrical contact (conductive) There is also a risk of failure. In addition, the scattering of the dust substance is not preferable from the viewpoint of the working environment.

  For this reason, in the terminal manufacturing apparatus having the above-described configuration, it is possible to quickly remove dust substances generated at the time of laser welding so that scattering and accumulation of dust substances do not occur in the terminal manufacturing apparatus. This is preferable in terms of improving product quality.

  Accordingly, an object of the present invention is to properly arrange dust collection means that can effectively remove dust substances generated during laser welding, assuming that the press machine and the laser welding machine are arranged on a continuous production line. In particular, in relation to the position of the welded portion formed on the crimp terminal, the dust collecting means is properly disposed to quickly remove dust substances generated during laser welding, and within the terminal manufacturing apparatus. An object of the present invention is to provide a terminal manufacturing apparatus capable of suppressing both scattering and accumulation of dust substances and improving both the manufacturing speed and product quality of crimp terminals.

  In order to achieve the above object, the gist of the present invention is as follows.

(1) Punching on a continuously supplied strip-shaped workpiece, bending to form a crimping part by bending it into a cylindrical shape so that two edges are close to each other, and one end of the crimping part To form an overlapped portion, and at least a crushing process for closing the opening of the one end portion to form a chain terminal in which a plurality of crimp terminals each having a crimp portion are connected at a constant interval. A laser beam welding machine that applies laser welding to the two edge portions and the overlapped portion of the press-bonding portion to form first and second weld portions in the press-bonding portion, and the laser; A terminal manufacturing apparatus comprising dust collecting means for sucking and removing dust substances generated from the first and second welds due to welding by a welding machine.

(2) The terminal manufacturing apparatus according to (1), wherein the dust collecting means is provided in the laser welding machine.

(3) The dust collecting means includes a first dust collecting device that mainly sucks and removes dust substances generated on the laser irradiation surface side of the first and second welding portions, and a back surface side of the laser irradiation surface of the first welding portion. A second dust collecting device that mainly sucks and removes dust substances generated on the inner surface side of the crimping portion, and a third collection that mainly sucks and removes dust substances generated on the back side of the laser irradiation surface of the second welded portion. The terminal manufacturing apparatus according to (1) or (2) above, comprising three dust collectors of the dust apparatus.

(4) The first dust collector is a push-pull configured by disposing an air blower and a suction device in an upper position across the virtual axis of the pressure-bonding portion when the laser welding machine is at the welding position. It is a dust collector, The terminal manufacturing apparatus as described in said (3) characterized by the above-mentioned.

(5) The above (3) or (3), wherein the second dust collecting device is disposed so as to face an opening at the other end of the crimping portion when the second dust collecting device is at a welding position of the laser welding machine. The terminal manufacturing apparatus as described in 4).

(6) The above (3), (3), wherein the third dust collecting device is disposed at least below the second welded portion of the pressure-bonding portion when in the welding position of the laser welding machine. The terminal manufacturing apparatus as described in 4) or (5).

  According to the present invention, it is possible to perform a punching process on a continuously supplied strip-shaped work sheet material, a bending process in which a crimping part is formed by bending in a cylindrical shape so that two edges are close to each other, and one of the crimping parts. At least crushing to close the opening of one end by crushing the end part to form an overlapped part forms a chain terminal in which a plurality of crimp terminals each having a crimp part are connected at regular intervals A laser press that performs laser welding on the two edges of the press-bonding part and the overlapping part of the press-bonding part, and forms a first and a second welded part on the press-bonding part, and a laser welding machine By providing a dust collecting means for sucking and removing dust substances generated from the first and second welds due to welding, the dust substances generated during laser welding can be quickly sucked and removed, and the terminal Scattering of dust substances in the manufacturing equipment As a result of suppressing the accumulation, the product quality of the crimp terminal can be improved, and since the chain terminal after processing in the press machine is not taken up, it can be continuously conveyed to the welding machine and immediately welded. The manufacturing speed of the crimp terminal can be improved (the manufacturing time can be shortened).

FIG. 1 is a schematic configuration diagram of a terminal manufacturing apparatus according to the present invention. FIGS. 2A to 2D are views for explaining a series of steps when a crimp terminal is manufactured using the terminal manufacturing apparatus of FIG. FIG. 3 is a view showing an embodiment when dust collecting means for sucking and removing dust substances is arranged in a laser welding machine. FIG. 4 shows only one crimp terminal out of the crimp terminals constituting the chain terminal during laser welding, and scattering or suction of dust substances caused by laser welding from each welded portion of the crimp terminal. It is the figure which showed notionally the direction removed.

  Hereinafter, an embodiment of a terminal manufacturing apparatus according to the present invention will be described with reference to the drawings. Note that the dimensions of the constituent elements of the terminal manufacturing apparatus shown in the drawings are all conceptually shown and are different from the actual dimensions.

  FIG. 1 shows a schematic configuration of a terminal manufacturing apparatus 1 of the present embodiment. The illustrated terminal manufacturing apparatus 1 includes an unwinding roll 10, a press machine 20, a laser welding machine 30, a welding state inspection machine 40, a winding roll 50, and these from the upstream side in the feed direction on the left side in the drawing. And a control device 60 for controlling the operation.

  By the way, the press machine 20 which performs a press process conventionally, and the resin sealing manufacturing apparatus which performs the resin sealing process of the next process are not arrange | positioned on the same continuous line, but each process is carried out in a separate place. It was carried out after moving. That is, after the chain terminal ST-1 processed by the press machine 20 was once wound up in a roll shape, it was carried to the next resin sealing step and unwound from the roll again to perform resin sealing. On the other hand, the terminal manufacturing apparatus 1 of the present invention arranges the press machine 20 that performs the pressing process and the laser welding machine 30 that performs the laser welding process instead of the resin sealing process on the same manufacturing line. Then, the processing process in the press machine 20 and the welding process in the laser welding machine 30 are continuously performed as a series of processes.

  In the present embodiment, the welding state inspection machine 40 is not an essential configuration. In addition, for convenience of explanation, an example in which the laser welding machine 30 and the welding state inspection machine 40 are separately configured as separate apparatuses is shown, but an aspect in which the function of the welding state inspection machine 40 is incorporated in the laser welding machine 30. Is also included.

  Hereinafter, each component of the terminal manufacturing apparatus 1 will be described.

  The unwinding roll 10 is a mechanism for unwinding and supplying a copper strip CS, which is a strip-shaped plate material 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 addition, the unwinding roll 10 should just be the structure which sends out the strip | belt-shaped to-be-processed board | plate material CS continuously, and is not limited only to a roll shape.

  In the present embodiment, a plate material made of a copper alloy is used as the copper strip CS. Needless to say, the material of the plate material CS to be processed is not limited to a copper alloy. For example, an aluminum-based material may be used as the plate material to be processed. Examples of the plate thickness of the plate to be processed include 0.25 mm and 0.32 mm, but are not limited to the plate thickness.

  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.

  As shown in FIG. 2, the press machine 20 is punched into a strip-shaped workpiece CS that is continuously supplied, and is bent into a cylindrical shape so that two edges are close to each other, thereby forming a crimping portion Ta-2. Each of the crimping parts Ta-2 is subjected to at least a crushing process for crushing one end part of the crimping part Ta-2 to form an overlapped part and closing the opening of the one end part. A chain terminal T2 in which a plurality of crimp terminals ST-1 are connected at regular intervals is formed. Further, the press machine 20 is continuously fed from the unwinding roll 10, and while the copper strip CS, which is a strip-shaped plate material, is intermittently conveyed by a feed mechanism (not shown), punching and two edges A plurality of crimps each having a crimp part Ta-2 for receiving a tip part including the exposed conductor part of the coated conductor by sequentially performing a pressing process such as a bending process to be bent into a cylindrical shape so as to be close to each other This is a device for forming a chain terminal T2 in which the terminals ST-1 are connected at regular intervals.

  Specifically, the copper strip CS unrolled from the unwinding roll 10 (FIG. 2 (a)) is punched out as a primary press by the press machine 20 to obtain FIG. 2 (b). The punching plate material T1 shown in FIG. The punched plate material T1 is formed with carrier portions C1 and C2 for conveying the punched plate material T1 in the feeding direction in the press machine 20 at both width end portions thereof. The carrier portions C1 and C2 have a plurality of holes H for inserting pins (not shown) at a predetermined pitch for positioning during transportation (in FIG. 2B, a plurality of crimp terminals ST-1 are formed from the punched plate material T1. When manufactured, one punched plate material T1 is provided at each of the carrier portions C1 and C2 corresponding to the plate material portion corresponding to each crimp terminal ST-1. Between the carrier parts C1 and C2, a box serving as a connection part between the plate material part Ta-1 for constituting the cylindrical crimping part Ta-2 of each crimping terminal ST-1 and other terminals in the subsequent process. Plate-shaped part Tb-1 for comprising the connector part Tb of a shape is formed.

  The punched plate material T1 is then subjected to a bending process as a secondary press by the press machine 20, so that a plurality of crimp terminals ST-1 before welding are spaced at a constant interval as shown in FIG. 2 (c). A chained terminal T2 is formed which is connected to each other. In this chain terminal T2, one carrier part C2 has already been removed, and only the other carrier part C1 is provided. Further, the plate material portion Ta-1 constituting the crimping portion Ta-2 and the plate material portion Tb-1 constituting the connector portion Tb are respectively bent into a tubular crimping portion Ta-2 before welding and a box. And a connector portion Tb. In this state, a butt interface Tc is formed between the two edges by bending the crimped section Ta-2 before welding into a cylindrical shape so that the two edges are close to each other. . Note that the outer shape of the pressure-bonding portion Ta-2 before welding may be formed into a cylindrical shape having a step on the surface of the pressure-bonding portion Ta-2 before welding by overlapping two edges in the radial direction. That is, you may form crimping | compression-bonding part Ta-2 before welding in a level | step difference pipe structure.

  The laser welding machine 30 performs laser welding on the two edges of the crimping portion Ta-2 and the overlapped portion to form the first welded portion Te and the second welded portion Td on the crimping portion Ta-2, respectively. To do. Specifically, the laser welding machine 30 welds two edges, which are the butt interface Tc of the crimping part Ta-2 of each crimping terminal ST-1 constituting the chain terminal T2 before welding, to the welding position (FIG. 3), at least laser welding is performed in a rectangular region surrounded by a one-dot chain line) 31 to form a welded portion (first welded portion) Te in the crimped portion Ta as shown in FIG. This is an apparatus for forming a crimping portion Ta of the crimping terminal ST. Specifically, as shown in the perspective view of FIG. 4, the butt interface Tc formed in the axial direction is laser-welded at the upper end portion of the crimped portion Ta that is bent into a cylindrical shape in the terminal ST. To do. Further, in the crimp terminal, moisture can be prevented from entering into an electrical connection portion (not shown) constituted by the end portion (not shown) of the covered electric wire and the crimp terminal ST without using resin sealing. Therefore, the connecting portion of the crimping portion Ta with the connector portion Tb is crushed to form an overlapping portion in which one end of the plate material bent into a cylindrical shape is overlapped in a planar shape, and this overlapping portion is laser welded. Thus, a liquid-tight sealing portion (second welding portion) Td is formed. 2 (d) and 4 illustrate the case where the butt interface Tc is welded when the crimp terminal ST-1 before welding is bent. In the present invention, the two edges are formed as diameters. It can also be joined by laser welding in a state of overlapping in the direction.

  Fiber laser welding is used for laser welding of the laser welding machine 30. Since the fiber laser has excellent beam quality and high condensing performance, it is possible to realize laser welding having a higher energy density in the processing region than a conventional laser. For this reason, it is possible to process the material at high speed, and there is little heat influence, and deep penetration welding with a high aspect ratio is possible. A certain butt interface Tc can be appropriately joined. The fiber laser may be irradiated by continuous oscillation, pulse oscillation, QCW oscillation, or pulse-controlled continuous oscillation. The fiber laser may be a single mode or multimode fiber laser.

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

  Further, the terminal manufacturing apparatus 1 according to the present invention sucks and removes dust substances (particularly spatter and fumes) generated from the first welded portion Te and the second welded portion Td due to welding by the laser welding machine 30. Dust collecting means 70 (shown in FIG. 3). For example, as shown in FIG. 4, the dust collecting means 70 pushes the connector part Tb side of the pressure-bonding part Ta-2 before welding when the first welding part Te is formed in the pressure-bonding part Ta by laser welding. Spatter and fume generated from the first welded portion Te and the second welded portion Td, respectively, when forming the second welded portion Td, which is a liquid-tight sealed portion sealed by laser welding of the crushed and overlapped plate material portions It is an apparatus for sucking and removing dust substances such as, and is an essential invention-specifying item in the present invention.

  In the present invention, by providing the dust collecting means 70, dust substances such as spatter and fumes generated when the first welded portion Te and the second welded portion Td of the press-bonded portion Ta are formed by laser welding can be effectively used. A feeding mechanism (not shown) that can suppress suction and prevent dust substances from accumulating in the laser welding machine 30 and peripheral equipment of the laser welding machine 30 and sending the chain terminal ST-1 to the laser welding machine 30. As a result, it is possible to suppress the dust substance from being deposited on the crimping portions Ta-2 and Ta of the crimping terminals ST-1 and ST, so that the product quality of the crimping terminal ST can be improved.

  The dust collecting means 70 is particularly preferably provided in the laser welding machine 30 from the viewpoint of enhancing the dust collecting effect and effectively suppressing the dust material from scattering to other peripheral equipment.

  As shown in FIG. 3, the dust collecting means 70 is shown in FIG. 4 with the direction of dust material (the dust material scattering (suction) direction) generated on the laser irradiation surface side of the first welded portion Te and the second welded portion Td as an arrow SF1. 1st dust collector 71 which mainly removes by suction, dust material (scattering (suction) of dust material) generated on the inner surface side of the crimping portion Ta-2 corresponding to the back surface side of the laser irradiation surface of the first welded portion Te. The second dust collector 72 that mainly sucks and removes the direction of the arrow SF2 (shown in FIG. 4), and the dust material (dust material scattering (suction) direction) generated on the back side of the laser irradiation surface of the second weld Td. It is preferable that the third dust collecting device 73 is mainly composed of the third dust collecting device 73 that sucks and removes the arrow SF3 (shown in FIG. 4) from the standpoint of effectively sucking and removing the dust collecting substance.

  That is, the present inventors have examined where the dust materials such as spatter and fumes generated during laser welding are generated from the welded crimp terminal. As shown in FIG. Laser irradiation surface side of the first and second welded portions Te, Td, inner surface side of the crimped portion Ta-2 corresponding to the back surface side of the laser irradiated surface of the first welded portion Te, and laser irradiated surface of the second welded portion Td In order to effectively remove the scattering (or accumulation) of these dust substances, as described above, the first corresponding to the position where the dust substances are mainly generated, respectively. It has been found that it is effective to arrange three dust collectors of third dust collectors 71 to 73. From this, the first, second and third are mainly matched to the locations where the first and second welds Te and Td subjected to laser welding are scattered in three directions (directions indicated by arrows SF1 to SF3). It is preferable to dispose the dust collectors 71, 72, and 73, respectively, because dust substances generated during laser welding can be effectively sucked and removed to significantly suppress the scattering of the dust substances. In the embodiment shown in FIG. 3, the case where three dust collecting devices are arranged as the dust collecting means 70 is shown, but the number of arranged dust collecting devices achieves more effective suction removal. Therefore, it can be appropriately changed according to the position of the welded portion where the dust substance is generated.

  The first dust collector 71 is a push-pull configured by disposing an air blower 74 and a suction device 75 in an upper position across the virtual axis of the pressure-bonding portion Ta when the first dust collector 71 is at the welding position 31 of the laser welding machine 30. A dust collector is preferable. The first dust collecting device 71 does not suck and remove only the dust material SF1 generated on the laser irradiation surface side shown in FIG. 4, but also sucks and removes the dust material existing around the first dust collecting device 71. Of course it is possible. Further, for example, in FIG. 3, the first dust collecting device 71 is disposed on the upstream side when the suction device 75 is viewed in the conveyance direction F (illustrated by a white arrow) of the chain terminal T <b> 2 with respect to the blower 74. The dust material scattered in the atmosphere together with the air blown out from 74 is configured to be sucked into the suction device 75 in a direction opposite to the conveyance direction F of the chain terminal T2, but is limited to this configuration. Instead, the air blower 74 may be arranged on the upstream side with respect to the suction device 75 when viewed in the conveyance direction F of the chain terminal T2.

  The second dust collector 72 is preferably arranged to face the opening STO at the other end of the crimping portion Ta when the second dust collector 72 is at the welding position 31 of the laser welding machine 30. As a result, the second dust collecting device 72 is generated not only in the dust material SF2 scattered outside from the opening STO shown in FIG. -2 can also be effectively sucked and removed by sucking the dust substance deposited or floating inside -2 to the outside of the crimping part Ta-2 through the opening STO. In addition, the second dust collector 72 can naturally suck and remove dust substances existing around the second dust collector 72.

  It is preferable that the 3rd dust collector 73 is arrange | positioned at least below 2nd welding part Td of crimping | compression-bonding part Ta-2 when it exists in the welding position 31 of the laser welding machine 30. FIG. The third dust collector 73 not only sucks and removes the dust substance SF3 generated on the back side of the laser irradiation surface shown in FIG. 4, but also sucks and removes the dust substance existing around the third dust collector 73. Of course it is also possible.

  The first welded portion Te and the second welded portion Td can be formed by the same laser irradiation device 32 or by separate laser irradiation devices.

  Further, in FIG. 3, a support base 33 that supports the chain terminal T <b> 2 from below is provided at the welding position 31 of the laser welding machine 30, and a suction port 35 is provided at a portion corresponding to the welding position 31 of the support base 33. The dust collecting container 34 for storing the sucked dust substance is provided below the suction port 35, and the third dust collecting device 73 is connected to the side wall of the dust collecting container 34. It is also possible to dispose the third dust collecting device 73 directly below. In the illustrated embodiment, dust substances that fall downward during laser welding can be effectively sucked and removed by the third dust collecting device 73 through the suction port 35 communicating with the inside of the dust collecting container 34. By combining the dust collecting container 34 and the third dust collecting device 73 according to the present invention, as shown in FIG. 3 in particular, it is possible to effectively prevent dust substances scattered mainly downward during laser welding of the second weld Td. The dust substance can be accommodated inside the dust collecting container 34 by suction. Further, the dust collecting container 34 is configured so that the accumulated dust substance can be easily taken out.

  For reference, examples of dimensions of the crimp terminal ST, the first to third dust collectors 71, 72, and 73, the support base 33, and the suction port 35 are shown below.

  The overall length of the crimp terminal ST is, for example, 20 mm, the width of the connector portion Tb is, for example, 3-4 mm, the height of the connector portion Tb is, for example, 5 mm, and the aperture STO is, for example, 2.3 mm. In this case, the suction port of the suction device 75 of the first dust collector 71 has, for example, a diameter of 30 mm × 30 mm square, and the width of the suction port is a portion where the crimp terminal ST is welded. It is preferable that the length includes at least the welded portion Te and the second welded portion Td, that is, a length including at least the entire length of the crimping portion Ta from the opening STO to the second welded portion Td. Furthermore, although the 2nd dust collector 72 has a suction port with a diameter of 20 mm, for example, in this invention, it is preferable to have a suction port with a diameter more than the diameter of opening STO. Furthermore, when the suction port of the third dust collecting device 73 is at a position below the overlapped portion of the crimp terminal, the dimension is larger than the weld area of the overlapped portion where the second welded portion Td is formed, for example, The aperture is preferably 20 mm. In FIG. 3, since the suction port of the third dust collecting device 73 is indirectly sucked through the suction port 35 of the support base 33, in this case, the diameter of the suction port 35 of the support base 33. Is preferably set to a dimension equal to or larger than the welding area of the overlapping portion where the second welded portion Td is formed. Further, in this case, the width dimension of the support base 33 in the direction orthogonal to the transport direction F is, for example, 30 mm, and the width dimension of the suction port 35 of the support base 33 in the direction orthogonal to the transport direction F is, for example, What is necessary is just to be 15 mm.

  The welding state inspection machine 40, for example, the laser welding state inspection machine 40, is an apparatus for performing the welding state of each crimp terminal ST of the laser-welded chain terminal T3 by image inspection using an imaging means such as a CCD camera. . Specifically, with respect to the welding conditions at the first and second welded portions Td and Te laser-welded by the laser welding machine 30, the positional deviation amount or bead width in the axial direction of the welding position is detected by an imaging means such as a CCD camera. Is determined to be within an allowable range.

  In addition, the chain terminal T2 before welding located between the press machine 20 and the laser welding machine 30 is conveyed with slack. Similarly, the chain terminal T3 located between the laser welding machine 30 and the welding state inspection machine 40 is also conveyed with slack. This is because the processing timings of the press machine 20 and the laser welding machine 30, or the laser welding machine 30 and the welding state inspection machine 40 are shifted, and this is caused by the chain terminals T2 and T3 located between the processes. It is for absorbing by slack.

  The winding roll 50 is a mechanism for winding the chain terminal T3 at the same speed as the unwinding roll 10. As with the unwinding roll 10, the chain terminal T <b> 3 is also intermittently conveyed in the winding roll 50 in accordance with the timing of the welding or inspection process in the laser welding machine 30 or the welding state inspection machine 40 in the previous process. Therefore, as shown in FIG. 1, the chain terminal T <b> 3 has a certain slack between the winding roll 50 and the welding state inspection machine 40, and the difference in the conveyance timing between the intermittent conveyance and the continuous conveyance is shown. I try to absorb it.

  As described above, for convenience of explanation, an example in which the laser welding machine 30 and the welding state inspection machine 40 are separately configured as separate apparatuses is shown. However, the welding state inspection machine 40 is included in the laser welding machine 30. It is also possible to incorporate these functions. That is, in the laser welding machine 30, it is realizable by providing an image inspection camera on the downstream side where the laser irradiation device 32 is provided and on the conveyance path of the chain terminal T3.

  The control device 60 mainly controls the operation of the laser welding machine 30 in order to continuously perform the press work in the press machine 20 and the laser welding in the laser welding machine 30 as a series of steps on the same production line. Is for.

  Moreover, since the press and laser welding can be performed in one line instead of separate lines, the production speed of the crimp terminal ST can be improved. Further, since the welding time and the feed positioning time in the laser welding machine 30 are determined based on the pressing time, the processing time of the pressing machine 20 and the processing time of the laser welding machine 30 can be synchronized. Can be connected smoothly.

  Further, as one specific means for determining the feed positioning time for synchronizing the processing time of the press machine 20 and the processing time of the laser welding machine 30, for example, the processing time, the press time, the welding time, and the terminal It is divided into the conveyance time and the positioning time, and after that, calculation similar to the press time in the press machine 20 is performed. In this case, even if the welding time is determined in advance by the thickness of the terminal, the welding accuracy, etc., it can be dealt with by adjusting the conveying time and the positioning time.

  Further, a welding state inspection machine 40 for inspecting the welding state of the laser-welded crimping portion Ta is provided on the downstream side of the laser welding machine 30. By inspecting the workability of welding with this welding condition inspection machine 40, all the steps of press work, welding work, and workability inspection can be executed in one process, and the terminal manufacturing device with high terminal production speed 1 can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, provision of the terminal manufacturing apparatus which can aim at both improvement of the product quality of a crimp terminal and improvement of the manufacturing speed of a crimp terminal (reduction of manufacturing time) became possible.

DESCRIPTION OF SYMBOLS 1 Terminal manufacturing apparatus 10 Unwinding roll 20 Press machine 30 Laser welding machine 31 Welding position 32 Laser irradiation apparatus 33 Support stand 34 Dust collection container 35 Suction port 40 Welding state inspection machine 50 Winding roll 60 Control apparatus 70 Dust collection means 71 1st DESCRIPTION OF SYMBOLS 1 Dust collector 72 2nd dust collector 73 3rd dust collector 74 Blower of 1st dust collector 75 Suction machine of 1st dust collector C1, C2 Carrier part CS Workpiece board material, Copper strip F Conveyance of chain terminal Direction H Hole SF1 Dust material SF2 Dust material SF3 Dust material ST Crimp terminal ST-1 Crimp terminal before welding STO Crimped portion opening T1 Stamped plate T2 Chain terminal before welding T3 Chain terminal Ta Crimped portion Ta-1 Consists of crimped portion Plate material portion to be Ta-2 Crimped portion before welding Tb connector portion Tb-1 Plate material portion constituting the connector portion Tc Butt interface Td 2 weld Te first weld

Claims (6)

To the strip-shaped processed plate material supplied continuously,
Punching,
Bending to form a crimping part by bending it into a cylindrical shape so that the two edges are close to each other, and crushing one end of the crimping part to form an overlapped part and opening the one end A press for forming a chain terminal in which a plurality of crimp terminals each having a crimp part are connected at a constant interval, at least subjected to crushing to close;
A laser welding machine that performs laser welding on the two edge portions of the crimp portion and the overlapping portion, and forms first and second weld portions on the crimp portion; and
Dust collecting means for sucking and removing dust substances generated from the first and second welds due to welding by the laser welding machine;
A terminal manufacturing apparatus comprising:   The terminal manufacturing apparatus according to claim 1, wherein the dust collecting means is provided in the laser welding machine. The dust collecting means includes
A first dust collecting device for mainly removing dust substances generated on the laser irradiation surface side of the first and second welds;
A second dust collecting device for mainly sucking and removing dust substances generated on the inner surface side of the crimping portion corresponding to the rear surface side of the laser irradiation surface of the first welding portion; and on the rear surface side of the laser irradiation surface of the second welding portion. 3. The terminal manufacturing apparatus according to claim 1, wherein the terminal manufacturing apparatus comprises three dust collectors of a third dust collector that mainly removes the generated dust substance by suction. 4.   The first dust collector is a push-pull dust collector configured such that an air blower and a suction device are arranged opposite to each other at an upper position across the virtual axis of the crimping portion when the first dust collector is at the welding position of the laser welder. The terminal manufacturing apparatus according to claim 3, wherein:   5. The terminal according to claim 3, wherein the second dust collecting device is disposed to face an opening at the other end of the crimping portion when the second dust collecting device is at a welding position of the laser welding machine. manufacturing device.   The said 3rd dust collector is arrange | positioned at least under the said 2nd welding part of the said crimping | compression-bonding part when it exists in the welding position of the said laser welding machine, The 3, 4 or 5 characterized by the above-mentioned. Terminal manufacturing equipment.

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