JPS62105492A - Repair welding of printed board and apparatus for the same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a printed circuit board repair welding method for repairing disconnected wiring patterns on a printed circuit board used in electronic control circuits, etc. in the manufacturing work of the printed circuit board. The present invention relates to a method and an apparatus thereof.

[Conventional technology]

In recent years, the electronic equipment industry has been rapidly developing, and electronic control circuits themselves are no longer available, so printed circuit boards with wiring circuit patterns are often used. As the demand for such printed circuit boards increases, the number of defects occurring in the manufacturing process of printed circuit boards is also increasing. Among these defects, one that is particularly common is "a single cut in the wiring pattern."

In this case, either discard this board as a defective product or
Alternatively, this "cut" part can be repaired using a welding machine designed specifically for printed circuit board patterns, and the repaired printed circuit board can then be used in products. Currently, the restoration material is supported and welding is performed one by one in the necessary areas while looking through a microscope.

(Problem to be solved by the invention) In this way, when repairing a "cut" in the wiring pattern of a printed circuit board, the worker operates the welding machine and the repair material one by one, and the worker visually confirms each cut. Therefore, a skilled worker is required for this work, and the positioning accuracy of the repair material varies depending on the worker, making it impossible to obtain a stable and highly accurate repair substrate. In addition, the thickness of the wiring pattern on a printed circuit board is normally 0.1 to 0.8#, and in particular, this is now even thinner, 0.06m, which is called A3. Repair work with (1
The method (C) also has problems such as causing fatigue in work clothes and causing many repair failures.

[Failure to solve the problem]

The present invention was invented with the aim of solving the above problems and enabling automation of the repair work of the wiring pattern of a printed circuit board. A guide unit 20 that guides the filamentous repair material 80 is disposed on one side of the welding tool 11, and a drawer unit that pulls out the repair material 80 from the guide unit 20 so as to cross the front end of the welding tool 11. 40 to guide the repair material 80, and
One end of the repair material 80 is welded with the welding tool 11 to one side of the wiring repair area, and then the work table 8 is placed on the base 7 in a direction orthogonal to each other and on which the printed circuit board 70 is placed. The work table 8 is moved by a predetermined amount at a time along the repair wiring pattern of the printed circuit board 70 by the linear movement unit 91 that moves the repair material from the welding point to at least a plurality of positions at predetermined intervals. 80, and the other end of the repair material 80 is welded to the other side sandwiching the wiring repair portion.

[Effect]

Winding around the reel 22 (drawing unit i~20 that guides the thread-like repair material 80 in a straight line so as to cross the front of the tip of the welding tool 11)~40
After pulling out the rA80, place the printed circuit board 70 with the wiring repair area on the work table 8 fixed to the work table unit 1-90, which is composed of a rotation unit 92 and a linear movement unit 91. Then, the work table unit 1-90 is operated to a preset position such that the wiring repair location coincides with the tip of the welding tool 11 to position the wiring repair location on the printed circuit board 70.

At this time, in front of the tip of this welding tool 11, a repair wiring pattern having a wiring repair part is opened, and after aligning the repair wiring pattern and the repair material 80 in a straight line, the welding tool 11 moves forward, and the repair wiring pattern has a repair part. be welded. When this work is completed and the welding tool 11 returns, the linear movement unit 91
moves a predetermined amount to a preset position. Then, the welding tool 11 moves forward again to perform welding at the next position. In this way, the repair welding work is performed by repeating the above-mentioned work one after another at a plurality of positions spaced apart at predetermined intervals across the broken wire.

(Embodiment) An embodiment of the present invention will be described below based on the drawings.In FIGS. 1 and 2, 10 is a welding unit 1 to 1. The second unit is fixed to an elevating member 5 which is movable up and down along a rail 4 by a drive source 3 and is moved up and down by a drive source 6.

This welding unit 10 is provided with a tool drive source (not shown) that moves the welding tool 11 up and down.

The fixed block 1 is fixed to a base 7, and a work table 8 is attached to the base 7 by turning a handle 92a.
A rotation unit 92 that horizontally rotates is fixed.

A rectilinear movement unit 91 movable in directions perpendicular to each other on a horizontal plane is attached to the rotation units l to 92, and these rotation units 92 and the rectilinear movement unit 91 constitute a worktable unit l to 90. This work table unit 90 rotates the work table 8 on which the pudding 1-23 plate 70 is placed to a desired position or moves it forward and left/right to position the repair position of the printed circuit board 70 directly below the tip of the welding tool 11. It is.

Ru.

Also, a support arm 1 having one end fixed to the fixed block 1
A surveillance camera 102 as an imaging means is opened at the other end of 01, and this surveillance camera 102 focuses on the printed circuit board 70 on the workbench B that has been moved to a predetermined position, and the welding The tip of the tool 11 is the printed circuit board 7
Welding tool 11 has a focus at a position tangent to 0.
It is installed diagonally from the front to the rear. This surveillance camera 102 is connected to the surveillance television 103 of separately placed operation control units ~93, and the rectilinear movement units 1-91 of the work table units 1-90 are connected to the operation means 94 of this operation control unit 93. The rotation unit 92 is configured to be operated automatically by turning a handle 92a.

As shown in FIG. 1, a guide unit 20 through which a filamentous repair material 80 passes is movable integrally with the welding unit 10, sandwiching the welding tool 11 attached to the tips of the welding units 1 to 10. Attach it to the guide plate 21,
This guide unit 20 guides the thread-like repair material 80 to the welding unit 10.

The repair material 80 to be supplied to the guide unit 20 is wound around a reel 22 rotatably attached to the guide plate 21 by a predetermined amount. ]~20 has been reached. The thread-like repair material 80 is fixed between the guide unit 20 and the welding unit 10, and this repair material 8
A lock unit 30 having a cutter 31 for cutting 0 is disposed.

Further, the other side of the welding unit 10 passes through the guide unit 20 and through the lock unit 30, moves forward to grasp the tip of the protruding repair material 80, and then moves backward to place the repair material 80 in place. A quantitative drawer unit 40 is attached to the guide plate 21 to cross the front end of the welding tool 11. When this drawer unit 40 moves forward to grab the repair material 80, the jaws 41
When the jaws 41 open and the tip of the repair material 80 enters, the jaws 41 close and retreat.

Further, a guide member 51 is fixed to the welding unit 10 and supports a positioning unit 50 that moves up and down together with the welding unit 10 to position the repair material 80 pulled out by the drawer unit 40 at a predetermined position. Part 5
1 includes two guides 1 constituting the positioning unit 50.
One lib 52 is provided so as to be freely movable. A guide arm 53 is fixed to the tip of this guide arm 52, and as shown in FIGS. 3 and 4, a repair material 80 is attached to a printed circuit board on both sides of the welding tool 10. A pressing part shrine 54 that presses against the shaft 70 is attached. This suppression department Kozue! The above-mentioned repair material 8 is on both sides of M.
A guide shrine 60 for guiding 0 has been removed. Further, as shown in FIG. 3, a connecting member 55 is fixedly provided at the rear end of the guide iti+l+52.
A tension spring 57 is disposed between the connecting member 55 and the guide member 51, and the connecting member 55 is elastically biased to move forward at all times. The guide member 51 has the connecting member 55
A positioning operation drive source 56 that operates to move the vehicle backward is fixed.

Next, the operation of this embodiment will be explained. Repair material 8 in advance
0 from the guide unit 20 with the jaws 41 of the drawer unit 40 and put it in a state where it crosses the front of the tip of the welding tool 11. Then, the printed circuit board 70 is placed in the lowered position of the tip of the welding tool 11 and on the work table 8. Locate the location where the wiring will be repaired.

Then, by operating the operating means 94, the linear moving unit 91
is operated, and the work table 8 is moved so that one of the repaired wiring patterns 10 sandwiching the wiring repaired portion of the printed circuit board 70 is at the lowered position of the welding tool 11. This operation moves the monitoring television 103 connected to the monitoring camera 102 while moving the linear moving unit 91 and rotating unit 91 to 92.
and perform fine positioning adjustments. In this way,
The repair material 80 and the repair wiring pattern having the wiring repair portion are aligned in parallel, and in this wiring pattern 10,
The welding tools 11 are positioned so that they match, and the welding tools 11 are set to come to the initial welding position.

Next, when the signal to start welding is received, as shown in Figure 1,
The positioning operation drive source 56 operates, and the positioning unit 5
0 moves forward. With this operation, the repair material 80 is pressed by the pressing member 54 and guided to the guide part 60, and the repair material 80 is positioned at a predetermined position GJ.
0 (J is pressed onto the repair wiring pattern. 1 Subsequently, the welding tool 11 advances and this is repaired 1u 4A
80 to perform welding. When this work is completed, as shown in FIG.
The drawer in which the two knits 50 each retreat to a predetermined position and grip one end of the restorative material 80] - Leek 1
~40 listen. Next, as shown in FIG. 4, the straight movement unit 91 moves the rework table 8 by a predetermined distance to the next welding position of the repair material 80, and the positioning unit 50 moves forward again to perform the above operations. .

Normally, when repairing a wiring pattern like this, multiple locations are welded, and in this example, two locations each are welded with the repair location in between, and the welding work described above is performed. The process is repeated, and when welding at four locations is completed and one work cycle is completed as shown in FIG. 5, the repair material 80 is cut by the cutters 31 of the lock units 1-30. Then, the whole unit retreated, and at the same time, the drawer unit 40 was cut again.
The work is completed by moving forward and grasping the tip of the repair +180, then moving backward and pulling out a predetermined amount of the repair +180. When the repair work on the printed circuit board 70 is completed in this manner, the linear movement unit 91 is operated to return to the work starting position, the fixation of the printed circuit board 70 is released, and the printed circuit board 70 is taken out. Subsequently, when the next printed circuit board is fixed on the work table 8, the above operations are repeated.

In this embodiment, the linear movement unit 91 is automatically moved to
Although the rotation units 92 are individually operated by operating the handles 92a, it is obvious that all of these units may be operated automatically instead of this. Fix the rotating units I~92 and attach the linear moving cornit 91 to this rotating unit 92 [
However, instead of this, the linear movable gorilla 1 to 91 is fixed to the base 7, the rotation unit 92 is attached to this linear movable unit 91, and the work table 8 is fixed to this.j:
However, the same effect can be achieved. Further, in this embodiment, two welding locations were used with the repaired location located between /υ, but the number of welding locations may be one or three locations.

〔Effect of the invention〕

As is clear from the embodiments described above, in the present invention, the guide unit 20 for guiding the thread-like repair material 80 is disposed on one side of the welding tool 11 movably provided on the base 7, and on the other side, Restorative material 80 from this guide unit 20
A drawer unit 40 is disposed to cross the front of the tip of the welding tool 11 to guide the repair material 80,
One end of the repair material 80 is welded to one side of the printed circuit board 70 across the wiring repair part using the welding tool 11, and then,
A rectilinear movement unit 91 that moves the work table 8 disposed on the base 7 in mutually orthogonal directions and on which the printed circuit board 70 is placed is moved back and forth and left and right, and the work table 8 is moved along the repair wiring pattern of the printed circuit board 70. The repair material 80 is moved a fixed amount at a time, and the repair material 80 is welded to at least a plurality of positions spaced apart from the welding point by a predetermined distance, and the other end of the repair material 80 is welded across the wiring repair location. be.

For this reason, d3() is added to the wiring pattern of the printed circuit board.
When repairing broken wiring, it is possible to easily position the thin thread-like repair material and the repaired parts of the wiring on the printed circuit board according to the wiring pattern, and perform welding work on multiple parts in succession, making it easier for the operator. This eliminates the need for skill and also makes automation possible, improving work efficiency. Furthermore, if the positioning work is performed first, there is no need to perform positioning each time during continuous work, and the positioning accuracy does not vary, making it possible to perform highly accurate repair work on the wiring pattern. In particular, even if the thickness of the wiring pattern on the printed L-board becomes thinner than that of the conventional wiring pattern, it can be done without relying on the operator, so the operator does not get tired.

Furthermore, compared to the case where a worker performs the repair work as in the past, since there is no need to directly touch the thread-like repair (A), the repair 4A will not get dirty and cause corrosion etc. , it has unique effects such as good weldability and long life.

[Brief explanation of drawings]

Fig. 1 is an enlarged front view of the main parts of a printed circuit board repair welding machine, Fig. 2 is a perspective view of the body showing an embodiment of the present invention, and Fig. 3 is an enlarged front view of the main parts showing the state in which the first welding work is completed. Figure, 4th
The figure is an enlarged front view of the main part showing the next welding work state, and FIG. 5 is an enlarged front view showing the welding location. 1 is a fixed block, 2 is a fixed plate, 3 is a first unit drive source, 4 is a rail, 5 is an elevating member, 6 is a second unit drive source, 7 is a base, 8 is a work table, 10 is a welding unit, 11 is a welding tool, 20 is a guide unit I~,
21 is a guide plate, 22 is a reel, 23 is a tension pulley, 30 is a lock unit, 31 is a cutter, and 40 is a drawer unit. 41 is a jaw, 50 is a positioning unit, 51 is a guide member, 52 is a guide shaft, 5
3 is a guide arm, 54 is a suppressing member, 55 is a connecting member, 56 is a positioning operation drive source, 57 is a tension spring, 60 is a guide member, 70 is a printed circuit board, 80 is a repair material, 90 is a work table unit, 91 is A linear movement unit, 92 is a rotation unit, 92a
93 is a handle, 93 is an operation control unit, 94 is an operating means, 101 is a support arm, 102 is a surveillance camera, 103
is surveillance television,

Claims (1)

[Claims] 1) A filamentous repair material 80 is guided in front of the tip of the welding tool 11 so as to cross it, and the welding tool 11 is used to guide the thread-like repair material 80 across the wiring repair portion of the printed circuit board 70 on one side. One end of the material 80 is welded, and then the work table 8 is moved a predetermined amount at a time along the repair wiring pattern of the printed circuit board 70.
Printed circuit board repair characterized in that the repair material 80 is welded to at least a plurality of positions at predetermined intervals from the welding location, and the other end of the repair material 80 is welded to the other side with the wiring repair location sandwiched therebetween. Welding method. 2) A guide unit 2 that guides the filamentous repair material 80 to one side with the welding tool 11 movably provided on the base 7 interposed therebetween.
0, and on the other hand, a drawer unit 40 for pulling out the repair material 80 from the guide unit 20 across the front of the tip of the welding tool 11, which is disposed on the base 7 in directions orthogonal to each other. A linear movement unit 91 is installed to move the work table 8 on which the printed circuit board 70 is placed back and forth and left and right, and one end of the repair material 80 is attached to one side of the repair wiring pattern having the wiring repair portion of the printed circuit board 70 using the welding tool 11. The printed circuit board repair welding apparatus is characterized in that the work table 8 is moved by a predetermined amount at a time along the repair wiring pattern using the linear movement unit 91, and the repair material 80 is welded at a plurality of positions.