JP2010125477A - Apparatus for supplying grooves of thread solder containing flux - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for supplying grooves of a thread solder containing flux, capable of securely stably advancing and retracting the thread solder per a required amount without causing the slippage of the thread solder. <P>SOLUTION: A grooving roller 10 and a feed roller 11 are arranged at opposite positions with the thread solder 3 interposed therebetween at a half way of a soldering guide 9 which guides the flux-containing thread solder 3. A ring-shaped grooving blade 25 is arranged at the outer circumference of the grooving roller 10. The grooving blade 25 is configured to continuously form a groove with a depth reaching a flux storage area at one side surface of the thread solder. A plurality of engaging protrusions 26 are formed with equal pitches at the outer circumference of the feed roller 11. The thread solder 3 is configured to advance and retract by allowing the engaging protrusions 26 to engage with the other side surface of the thread solder 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a supply device for supplying flux-cored yarn solder toward a target portion, and more specifically, a grooving supply device including a mechanism for grooving a side surface of the yarn solder. It is about.

  In the thread solder used for soldering electronic parts, flux is used to increase the surface tension of the molten solder and to prevent the formation of oxides and increase the wettability and diffusibility of the solder. Built in. Since the melting point of this flux is lower than the melting point of the solder, when the solder wire is heated by the heat of the tip during soldering, the flux is vaporized and rapidly expands, causing an explosion-like phenomenon, There has been a problem that flux and melted solder scatter around and adhere to printed circuit boards, electronic components, and the like, resulting in defective products.

  In order to solve such a problem, Patent Documents 1 and 2 disclose an explosion phenomenon by cutting a groove having a depth reaching the flux on the side surface of the thread solder immediately before soldering and letting the vaporized flux escape from the groove. Techniques for preventing are disclosed. In these prior arts, a guide roller having a V-shaped guide groove on the outer periphery and a disk-shaped rotary blade are used, and the rotation is performed on the side surface of the thread solder that fits into the V-shaped groove of the guide roller. The groove is cut with a blade.

In this case, in Patent Document 1, the guide roller is freely rotated, the rotary blade is driven by a motor, and thread solder is removed by frictional force generated when the groove is cut by the rotary blade. In Patent Document 2, both the guide roller and the rotary blade are driven by a motor, and the thread solder is fed by the rotational force of both the guide roller and the rotary blade. Yes.
JP 2003-200290 A JP2007-290026A

  However, in the above-described conventional technique using a guide roller with a groove, slip is likely to occur between the guide roller and the thread solder, and thus the thread solder cannot be stably transferred. Moreover, in the case of an automatic soldering machine that automatically performs soldering, the tip is soldered between one soldering point and the soldering iron being moved to the next soldering point. It is indispensable to keep the space for heat insulation between the thread solder and the tip by retracting the thread solder by a certain distance (for example, 3-5 mm) so that the thread solder does not melt by the heat of However, in the conventional technique, it is almost impossible to retract the thread solder once the groove is cut, and therefore, this technique cannot be used for an automatic soldering machine.

  Accordingly, an object of the present invention is to provide a flux-cored thread solder grooving and feeding device that eliminates slips associated with thread solder feeding and allows the thread solder to be moved forward and backward in a reliable and stable manner. It is to provide.

  In order to solve the above-mentioned problem, the grooving supply device of the present invention includes a solder guide that linearly guides the flux-cored thread solder, and a position opposed to the thread solder guided by the solder guide. A grooving roller and a feed roller disposed so as to be rotatable around an axis orthogonal to the thread solder, and a rotation drive mechanism for rotating the grooving roller and the feed roller, A ring-shaped groove cutting edge on the outer periphery, and the groove cutting blade is configured to continuously form a groove having a depth reaching the flux on one side surface of the thread solder in the length direction of the thread solder. The feeding roller has a plurality of locking projections formed at an equal pitch on the outer periphery, and the locking projections are locked to the other side of the thread solder so that the thread solder moves forward and backward. Configured to That.

In the present invention, the locking protrusion of the feed roller has a blade shape and has a cutting edge extending in the circumferential direction of the feed roller at the tip, and the locking protrusion bites into the side surface of the thread solder. It is preferable that intermittent grooves are formed on the side surfaces.
Further, it is desirable that the grooving roller and the feed roller are driven and rotated synchronously by the rotational drive mechanism.

Preferably, in the present invention, the solder guide has a linear solder transfer path through which the thread solder passes, and a groove cutting blade of the groove cutting roller and a locking protrusion of the feed roller on both sides of the solder transfer path. That is, a gap is formed to enter.
In this case, the solder guide has a pair of rods extending in parallel to each other, and V-grooves extending in the length direction of the rods are formed at positions opposite to each other on the outer surfaces of these rods. That is, the solder transfer path is formed between the V-shaped grooves.
Alternatively, the solder guide is formed by a hollow pipe, the hollow portion of the pipe is the solder transfer path, and the gap is formed by notching both side surfaces of the pipe.

  The present invention uses a grooving roller having a grooving blade on the outer periphery and a feed roller having a plurality of locking protrusions on the outer periphery, and the locking protrusion of the feeding roller is locked to one side surface of the thread solder. As the thread solder is transferred, the groove roller cuts the groove on the other side surface of the thread solder. As a result, the thread solder can be reliably and stably delivered by a necessary amount. Further, even if the thread solder is once cut, the thread solder can be reliably and stably retracted by a necessary amount by rotating the feed roller in the reverse direction.

  1 and 2 show a grooving and feeding apparatus for flux-cored yarn solder according to the present invention. This grooving and feeding device has a case 1 having a square box shape, and a solder reel 4 around which flux solder yarn 3 is wound is attached to the tip of an arm 2 extending from one end of the case 1. The reel mounting shaft 5 is rotatably attached.

  On one surface of the case 1, an inlet nozzle 7 into which the thread solder 3 fed from the solder reel 4 is introduced, an outlet nozzle 8 for feeding the thread solder 3 toward the target portion, and these A solder guide 9 that is interposed between the inlet nozzle 7 and the outlet nozzle 8 to linearly guide the thread solder 3, and the thread guide 3 in the middle of the solder guide 9 is opposed to the thread solder 3. A grooving roller 10 and a feed roller 11 are provided so as to be rotatable about axes L1 and L2 orthogonal to the solder 3. Inside the case 1, the grooving roller 10 and the feed roller are provided. A rotation drive mechanism 12 for rotating the motor 11 is accommodated.

The inlet nozzle 7 and the outlet nozzle 8 are cylindrical members having linear solder insertion holes 14 and 15 inside, and the solder insertion holes 16 and 17 fixed to the case 1 are inserted into the solder insertion holes 16 and 17. The holes 14 and 15 are attached so as to be concentric with each other. Therefore, the solder insertion holes 14 and 15 of the inlet nozzle 7 and the outlet nozzle 8 and the solder transfer path 18 of the solder guide 9 are connected in a straight line. In addition, a solder introduction port 14 a that is tapered so as to widen the inlet side is formed at the inlet end of the solder insertion hole 14 of the inlet nozzle 7.
The nozzle attachment member 17 to which the outlet nozzle 8 is attached is directly fixed to the outer surface of the case 1, but the nozzle attachment member 16 to which the inlet nozzle 7 is attached is attached to the outer surface of the case 1. It is fixed on the base plate 19.

As apparent from FIGS. 3 to 5, the solder guide 9 has a pair of rods 21 extending in parallel with each other with the axis L <b> 3 in the transfer direction of the thread solder 3. V-shaped grooves 22 extending in the length direction of the rod 21 are formed at positions opposite to each other on the outer surface, and the linear solder transfer path 18 through which the thread solder 3 passes is formed between these V-shaped grooves 22. Has been.
The pair of rods 21 are elongated cylindrical members having the same size and shape as each other, and are arranged in a state where a slight gap is maintained between them, and rod attachments in which both ends are fixed on the base plate 19 It is supported by the member 23. Accordingly, a gap 27 is formed between the pair of rods 21 so that the groove cutting blade 25 of the groove cutting roller 10 and the locking protrusion 26 of the feed roller 11 can enter the solder transfer path 18.

A plurality of the V-shaped grooves 22 are formed on the outer surface of the rod 21 at equal intervals in the circumferential direction. These V-shaped grooves 22 have different groove widths and depths, and are used by rotating the pair of rods 21 at an equal angle around the axis L3 to adjust the circumferential direction. A V-shaped groove 22 suitable for the diameter of the solder 3 can be selected.
A communication hole 23 a that connects the solder transfer path 18 and the solder insertion holes 14 and 15 of the inlet nozzle 7 and the outlet nozzle 8 is formed inside the rod mounting member 23.

  The grooving roller 10 and the feed roller 11 are disposed in positions close to the rod 21 at positions facing each other with the pair of rods 21 therebetween, and a roller shaft 29 attached to the center of each of the grooving roller 10 and the feed roller 11 The plate 19 is rotatably supported by a bearing member 30.

On the outer periphery of the grooving roller 10, the ring-shaped grooving blade 25 having a sharp and sharp cutting edge 25 a on the outer periphery is formed so as to surround the grooving roller 10. 25a enters the solder transfer path 18 through the gap 27 between the pair of rods 21, and reaches the region where the flux 3a inside the thread solder 3 is accommodated. However, the cutting edge 25 a of the groove cutting edge 25 does not reach the center of the solder transfer path 18.
Then, by the rotation of the grooving roller 10, the groove 3 b having a depth reaching the accommodation area of the flux 3 a is continuously formed in the length direction of the thread solder 3 on the side surface of the thread solder 3 by the grooving blade 25. It is designed to be cut.

  The feed roller 11 has a gear shape in plan view, and has a plurality of locking protrusions 26 formed on the outer periphery thereof at an equal pitch in the circumferential direction. The locking projection 26 has a blade shape in which the thickness in the direction of the axis L2 of the feed roller 11 is smaller than the width W in the circumferential direction, and the blade edge 26a extends in the circumferential direction of the feed roller 11. Similar to the cutting edge 25a of the grooving blade 25 of the grooving roller 10, it is sharply pointed. The tip of the locking projection 26, that is, the blade edge 26 a enters the solder transfer path 18 through the gap 27 between the pair of rods 21, and bites into the side surface of the thread solder 3 to be locked. . At this time, the distal end portion of the locking projection 26 only needs to extend to a position where it bites into the inside of the thread solder 3, and does not necessarily extend to a position reaching the accommodation area of the flux 3a. Therefore, the diameter of the imaginary circle formed by the tips (blade edges 26a) of all the locking projections 26 is the same as or slightly smaller than the diameter of the edge 25a of the groove cutting blade 25 of the groove cutting roller 10.

Then, by the forward or reverse rotation of the feed roller 11, the thread solder 3 is moved forward or backward by the locking protrusion 26 that is locked to the side surface of the thread solder 3. At this time, intermittent grooves 3 c are formed on the side surfaces of the thread solder 3 by the engagement protrusions 26 biting in.
Therefore, the feed roller 11 is formed so that at least one locking projection 26 bites into and locks the side surface of the thread solder 3 regardless of the rotation position thereof.

  Ends of the roller shaft 29 of the grooving roller 10 and the feed roller 11 extend from the base plate 19 to the inside of the case 1, and gears 32 and 33 are attached to the ends. These gears 32 and 33 are formed to have the same number of teeth and mesh with each other, and the gear 33 attached to the feed roller 11 is connected to the electric motor via the speed reduction mechanism 34 provided inside the case 1. 35. When the electric motor 35 is rotated, the feed roller 11 and the grooving roller 10 are rotated at the same speed in opposite directions through the speed reduction mechanism 34 and the gears 33, 32, so that the yarn solder 3 Feeding and grooving are performed. Therefore, the gears 32 and 33, the speed reduction mechanism 34, and the electric motor 35 constitute the rotation drive mechanism 12 that rotates the groove cutting roller 10 and the feed roller 11 in both forward and reverse directions.

However, the two gears 32 and 33 do not necessarily have the same number of teeth, and the number of teeth of the gear 33 attached to the feed roller 11 is slightly larger than the number of teeth of the gear 32 attached to the grooving roller 12. It doesn't matter. In this case, the rotational speed of the grooving roller 12 is slightly higher than the rotational speed of the feed roller 11.
Further, the gear 32 attached to the grooving roller 12 can be coupled to the rotational drive mechanism 12.

In FIG. 2, the portion 19 a of the base plate 19 to which the feed roller 11 is attached is separated from the portion to which the grooving roller 10 is attached and is in a direction perpendicular to the solder transfer path 18, that is, the feed roller. The fixing position can be adjusted in the direction in which the distance between the groove 11 and the grooving roller 10 changes. This adjustment is performed by a long hole 37 formed in the portion 19 a and a fixing screw 38 inserted into the long hole 37.
Thereby, not only can the depth at which the locking projection 26 of the feed roller 11 bites into the thread solder 3 be adjusted, but also the position of the feed roller 11 can be adjusted according to the diameter of the thread solder 3 to be used. it can.

  Reference numeral 39 in FIG. 1 is a power switch for turning on / off the power supply of the supply device. When the power switch 39 is turned on, the electric motor 35 rotates in the forward direction and the grooving roller 10 and the feed roller are turned on. 11 rotates in the direction of the arrow in FIG. 3, and the thread solder 3 advances, and a groove is formed on the side surface.

  In the supply device having the above-described configuration, when the use is started, the tip of the thread solder 3 pulled out from the solder reel 4 is placed in the solder insertion hole 14 of the inlet nozzle 7 with the power switch 39 turned off. After the introduction, it is guided into the solder transfer path 18 of the solder guide 9 and further fed between the grooving roller 10 and the feed roller 11.

  When the power switch 39 is turned on in this state, the grooving roller 10 and the feed roller 11 rotate in the direction of the arrow in FIG. 3, and the locking projection 26 of the feed roller 11 is engaged with one side surface of the thread solder 3. By stopping, the thread solder 3 is forcibly advanced, and a groove 3b having a depth reaching the flux 3a is formed on the opposite side surface of the thread solder 3 by the groove cutting blade 25 of the groove cutting roller 10. The thread solder 3 is continuously cut in the length direction. Then, the thread solder 3 that has been grooved is fed from the tip of the outlet nozzle 8 through the solder insertion hole 15 of the outlet nozzle 8. When the power switch 39 is turned off, the feeding of the thread solder 3 is stopped.

Here, when the supply device is used for manual soldering, by turning on / off the power switch 39, a necessary amount of the thread solder 3 is sent out from the outlet nozzle 8, and this thread solder 3 is sent to the solder iron. Melt with a tip and solder.
At this time, the feeding of the thread solder 3 is performed by the locking protrusions 26 of the feeding roller 11 being locked to the thread solder 3, so that the frictional force when the groove cutting roller 10 cuts the groove 3b acts. Even so, the thread solder 3 does not slip, and a necessary amount of the thread solder 3 can be reliably and stably supplied toward the target portion.
Further, since the groove 3b having a depth reaching the flux 3a is cut in the side surface of the thread solder 3, even if the flux 3a is heated at the tip during the soldering and rapidly vaporizes, the flux 3a Does not evaporate from the groove 3b and cause an explosion phenomenon.

On the other hand, when the supply device is attached to an automatic soldering machine such as a robot for automatic soldering, the power switch 39 is used for the first operation until the thread solder 3 is led out from the tip of the outlet nozzle 8. Then, with the power switch 39 turned off, soldering is performed automatically while the supply device (electric motor 35) is automatically controlled by the control device of the automatic soldering machine.
Alternatively, the operation until the thread solder 3 is guided to the inlet nozzle 7 can be manually performed, and the subsequent operation can be automatically performed by the control device.

  When supplying the thread solder 3 toward the tip of the soldering iron, the electric motor 35 rotates in the forward direction by a certain number of rotations, so that the feed roller 11 rotates in the forward direction by the corresponding number of rotations. The necessary amount of thread solder 3 is rotated and accurately fed by the feed roller 11. The fed solder wire 3 is melted by the tip and soldered. At this time, a groove 3 b is cut on the side surface of the thread solder 3 by a groove cutting roller 10 that rotates in synchronization with the feed roller 11.

Also, after soldering one soldering point, until the robot arm, that is, the soldering iron is moved and the next soldering point is soldered, the solder wire 3 does not melt with the heat of the tip. When the thread solder 3 is moved backward by a certain distance (for example, 3-5 mm) and separated from the tip, the electric motor 35 rotates in the reverse direction by a certain number of rotations, so that the feed roller 11 rotates according to the number of rotations. The thread solder 3 moves backward by a set distance. At this time, since the feed roller 11 rotates in a reverse direction from a state in which a part of the locking protrusions 26 bite into the thread solder 3 and is locked, the thread solder 3 slips between the feed roller 11. Without any problem, the required amount can be accurately retracted. Alternatively, even if the locking protrusion 26 is separated from or slightly separated from the intermittent groove 3c formed when the thread solder 3 is advanced, it is re-fitted into the groove 3c by the reverse rotation of the feed roller 11. The thread solder 3 is retracted by locking.
The grooving roller 10 also rotates in the direction opposite to that at the time of grooving in synchronization with the feed roller 11, but the grooving blade 25 simply revolves in the already cut groove 3b, so that the thread solder 3 moves backward. Will not be affected.

The second embodiment shown in FIGS. 6 to 9 shows a different configuration example of the solder guide 9. The solder guide 9 is formed by a hollow pipe 40, and the hollow portion of the pipe 40 serves as a solder transfer path 18. Further, in the intermediate portion of the pipe 40, the opposing portions on both side surfaces of the pipe 40 are cut into an elongated shape in the axial direction of the pipe 40, whereby the relationship between the groove cutting blade 25 of the groove cutting roller 10 and the feed roller 11 is obtained. A gap 27 for allowing the stop projection 26 to enter the solder transfer path 18 is formed.
A support member 41 having a diameter larger than that of the pipe 40 and flattened opposite side surfaces is fixed to both ends of the pipe 40, and the pipe 40 is fixed to the rod mounting member 23 via the support member 41. Yes.
In addition, since it is substantially the same as that of 1st Embodiment shown in FIGS. 3-5 about the structure and effect | action other than the above in this 2nd Embodiment, it is the main same component part of 1st Embodiment. The same reference numerals as those in FIG.

  In the above embodiment, the locking protrusion 26 of the feed roller 11 has a blade shape. However, even if the locking protrusion 26 has a pin shape with a sharp point, the other tip is not provided. Any shape that can be locked to the side surface of the thread solder 3 may be used.

It is a side view which shows the whole structure of 1st Embodiment of the grooving supply apparatus which concerns on this invention. It is a top view of FIG. It is an enlarged plan view of the principal part of FIG. FIG. 4 is a front view showing only a part of the members in FIG. 3 in cross section. It is the elements on larger scale of FIG. It is a principal part enlarged plan view similar to FIG. 3 which shows 2nd Embodiment of this invention. FIG. 4 is a front view showing only a part of the members in FIG. 3 in cross section. It is the elements on larger scale of FIG. It is a side view of a solder guide.

Explanation of symbols

L1, L2 Axis 3 Thread solder 3a Flux 9 Solder guide 10 Groove roller 11 Feed roller 12 Rotation drive mechanism 18 Solder transfer path 21 Rod 22 V-shaped groove 25 Groove cutting blade 26 Locking projection 26a Cutting edge 27 Gap 40 Pipe

Claims (6)

A solder guide that linearly guides the flux-cored thread solder and a position that is opposed to the thread solder guided by the solder guide so as to be rotatable about an axis perpendicular to the thread solder. A grooved roller and a feed roller, and a rotation drive mechanism for rotating the grooved roller and the feed roller,
The grooving roller has a ring-shaped grooving blade on the outer periphery, and a groove having a depth reaching the flux is continuously formed in one side of the thread solder with the grooving blade in the length direction of the thread solder. Configured to
The feed roller has a plurality of locking protrusions formed at an equal pitch on the outer periphery, and is configured to advance and retract the thread solder by locking the locking protrusions to the other side surface of the thread solder. A grooving / feeding device for flux-cored yarn solder.   The feed roller locking projection has a blade shape, and has a cutting edge extending in the circumferential direction of the feed roller at the tip, and this locking projection bites into the side surface of the thread solder, thereby intermittently forming the side surface. The grooving / feeding device according to claim 1, wherein a groove is formed.   The grooving supply device according to claim 1, wherein the grooving roller and the feed roller are driven and rotated synchronously by the rotation driving mechanism.   The solder guide has a linear solder transfer path through which the thread solder passes, and a gap through which the groove cutting blade of the groove cutting roller and the locking protrusion of the feed roller enter is formed on both sides of the solder transfer path. The grooving / feeding device according to claim 1, wherein the grooving / feeding device is formed.   The solder guide has a pair of rods extending in parallel to each other, and V-grooves extending in the length direction of the rods are formed at positions opposite to each other on the outer surfaces of the rods. The grooving / feeding device according to claim 4, wherein the solder transfer path is formed therebetween.   The solder guide is formed by a hollow pipe, the hollow portion of the pipe is the solder transfer path, and the gap is formed by notching both side surfaces of the pipe. 4. The grooving supply device according to 4.

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