JPH08264927A - Terminal pin joining jig - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a terminal pin joining jig, and more particularly, to a joining jig for joining one end of the terminal pin to the wiring board, when joining the terminal pin to the wiring board. And jig manufacturing cost is improved. [Structure] To hold terminal pins 8 vertically at all intersections on a minimum pitch grid that is movably fitted and held on a substrate 1 and covers a maximum area of a pad array on a wiring board 7. A terminal pin insertion block 2 having a terminal pin insertion blind hole 2a, and a terminal pin passage hole 3a corresponding to a different pad arrangement of the wiring board and selectively inserting the terminal pin as necessary or unnecessary. Terminal pin mask 3,
A fixing pin 5 that regulates the edge of the wiring board that is opposed to the terminal pin insertion block and positions and fixes it on the base body, and a spare hole in which a solder creeping-up regulation hole corresponding to the terminal pin insertion blind hole of the terminal pin insertion block is formed. It consists of a solder mask.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining jig for terminal pins, and more particularly to a joining jig for joining one end of a terminal pin to a wiring board.

A wiring board on which a large-scale integrated circuit is mounted at a high density is electrically connected by joining a large number of terminal pins for conducting circuit power and input / output signals and connecting the terminal pins to a main board. Is going.

The terminal pins have a pitch of 1.27 mm, for example.
Are arranged in a zigzag pattern or a zigzag pattern of 0.635 mm and are vertically attached to the wiring substrate, and it is required that a large number of terminal pins can be efficiently joined at one time.

[0004]

2. Description of the Related Art As shown in the side sectional views of FIGS. 10 (a) and 10 (b) and its perspective view, a conventional terminal pin joining jig is joined to a pad of a wiring board 14 indicated by a chain double-dashed line. Terminal pin 15
Corresponding to the array area of the rectangular recesses 11a formed in a predetermined depth from the front and back surfaces, and the plate thickness portion 11b between the recesses 11a, the pad array pitch of the wiring substrate 14, for example, a pad on a grid equal to 1.27 mm. , And a L-shaped retainer 12 for fixing the wiring board 14 to the block 11 for terminal attachment, which has a terminal pin insertion through hole 11c vertically formed only at an intersection corresponding to Then, the weight 13 which loosely fits into the recess 11a of the block 11 and is inserted into the terminal pin insertion through hole 11c of the block 11 to press the terminal pins 15 together at the same time.
It consists of and. Therefore, only the type of the wiring board 14 is prepared for the block 11 for the brazing. In addition,
After the terminal pins 15 have been inserted, the weight 13 is inserted upside down.

Joining of terminal pins using this joining jig
The joining of FIGS. 11A, 11B, 11C and 11D will be described with reference to side sectional views showing the order of steps. First, in the figure (a), a block 11 for brazing corresponding to the type of wiring board is prepared,
The terminal pin 15 is inserted into the terminal pin insertion through hole 11c of the block 11 for rotting. The figure shows the state after inserting the terminal pins.

In the next figure (b), the wiring board 14
Is placed on the upper concave portion 11a, and the positioning hole 14b formed in the wiring board 14 is inserted into the positioning pin 11d vertically provided on the upper surface, and then the edge of the wiring board 14 is pressed by the pressing tool 12 to be attached. Fix with screws 12a. At this time, the pad arrangement of the wiring board 14 and the terminal pin arrangement match. It should be noted that solder balls 17 are attached in advance to the head joint surfaces of the terminal pins 15.

In the next figure (c), the wiring board 14
The block 11 for roasting, which is fixed, is placed upside down, the weight 13 is put into the recess 11a on the upper side, and the terminal pin 15 is pushed down by applying a load, and the head thereof is placed on the pad 14a of the wiring board 14. Abut.

Next, the solder balls 17 are heated and reflowed in a reflow heating furnace (not shown) in a state where the terminal pins 15 are in contact with the pads 14a of the wiring board 14, so that the terminals shown in FIG. The wiring board 14 in which the pins 15 are vertically joined to the pads 14a is obtained.

Next, the wiring board on which the terminal pins are hung is
In order to connect to the main board, it is necessary to apply preliminary solder to the tip of each terminal pin, and this is done using a preliminary solder block prepared according to the type of wiring board.

That is, as shown in FIG. 12 (a), the positioning recess 1 formed in the upper surface of the preliminary solder block 16
The wiring board 14 is fitted to 6a, and the tip of the terminal pin 15 is exposed to a predetermined length from the solder creeping-up regulation hole 16b formed on the lower surface at the same pitch as the pad arrangement pitch, for example, 1.27 mm, and the rest is masked. Preliminary solder is applied to the tip by a solder dipping device (not shown), and as shown in FIG. 12 (b), a wiring board 14 is obtained in which terminal pins 15 having the presolder 18 applied to the tip are suspended.

[0011]

However, according to such a terminal pin joining jig as described above, the roasting block is mounted on the terminal pin (diameter 0.2 mm) for highly accurate positioning of the terminal pin. On the other hand, it is necessary to make a terminal pin insertion through hole (diameter 0.24 mm) with a very small gap, and one spare solder block does not come off when solder gets wet at the tip of the terminal pin Since it is necessary to increase the diameter of the block (diameter: 0.6 mm), both blocks must be constructed separately, and the production cost increases if the block-shaped joining jig is produced separately. was there.

Furthermore, the type of wiring board (irregular size,
It is necessary to prepare a brazing block and a pre-solder block for each pad arrangement). Therefore, the manufacturing cost of the joining jig is high, and the management thereof is also troublesome.In addition, it is troublesome to use the brazing block and the spare solder block according to the type of the wiring board, and the work efficiency is increased. There was a problem of being bad.

In view of the above problems, it is an object of the present invention to provide a terminal pin joining jig which can improve the work efficiency of joining and the jig manufacturing cost when joining the terminal pins to the wiring board.

[0014]

In order to achieve the above object, in a terminal pin joining jig according to the present invention, a base body having front and back surfaces parallel to each other and a movably fitted and held on the base body. A terminal pin insertion block having terminal pin insertion blind holes for vertically holding terminal pins at all intersections on a minimum pitch grid formed by covering a maximum area of a pad array of a wiring board; A terminal pin mask, which is overlapped with the terminal pin insertion block, has terminal pin passage holes corresponding to different pad arrangements of the wiring board and selectively inserting the terminal pins as necessary or unnecessary, and the terminal pin insertion block. A fixing pin that regulates the edge of the wiring board that is opposed to the base and positions and fixes it on the base, and a solder crawl that is fixed to the base and that corresponds to the terminal pin insertion blind hole of the terminal pin insertion block. Ri is composed of a pre-solder mask bored the restriction hole.

Alternatively, the fixing pin has a shaft portion having a size corresponding to a different size of the wiring board, a large-diameter portion for engaging an edge of the wiring board, and a small-diameter common diameter for positioning the base body. The part and the screwing means are provided on one axis.

[0016]

The terminal pin insertion block has the terminal pin insertion blind holes for vertically holding the terminal pins at all intersections on the minimum pitch grid formed by covering the maximum area of the pad array of the wiring board. Therefore, when arranging the terminal pins,
It can be commonly used for different pad arrangements of wiring boards and arrangements of an integral multiple pitch of the minimum pitch.

By using this terminal pin insertion block and the terminal pin mask having the terminal pin passage holes of an arrangement corresponding to each different pad arrangement of the wiring board, the terminal pin mask is selectively used according to the pad arrangement. Overlap the terminal pin insertion block and mask the unnecessary terminal pin insertion blind hole to insert the required terminal pin through the terminal pin passage hole, or the required terminal pin out of all the terminal pin insertion blind holes. An array of terminal pins corresponding to each pad array of the wiring board can be obtained on the terminal pin insertion block by covering the pins and extracting other terminal pins from the terminal pin passage holes.

Therefore, the substrate and the terminal pin insertion block can be commonly used even if the pad arrangement of the wiring board is different. When the pad arrangement of the wiring board is different, it suffices to selectively replace the terminal pin mask corresponding to the pad arrangement for one base.

Further, since the terminal pin insertion block is movably fitted to and held by the base body, and the terminal pin insertion blind hole into which the terminal pin is inserted is not a through hole, when the base body is turned upside down together with the terminal pin insertion block, the conventional structure is used. It acts on the terminal pins instead of the weight.

Further, in the preliminary solder mask, since the solder creeping-up regulation hole is formed in correspondence with the terminal pin insertion blind hole of the terminal pin insertion block, which terminal pin insertion blind hole is inserted into the terminal pin. Correspondingly, the tip can be inserted.

The fixing pin for fixing the wiring board to the base is a shaft portion having a size according to different sizes of the wiring board, a large-diameter portion for engaging the edge of the wiring board, and a common pin for positioning on the base. By configuring the small-diameter portion having the diameter and the screwing means on one axis, when the size of the wiring board is different, another fixing pin having a shaft portion having a corresponding diameter is used to make the large-diameter portion. Since the edge of the wiring board can be held down and can be fitted to the base body at the small diameter portion having the common diameter, one base body can be commonly used and fixed even for wiring boards of different sizes.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention will be described in detail below with reference to the embodiments shown in the drawings. As shown in the side sectional views of FIGS. 1 (a) and 1 (b) and the perspective view thereof, the joining jig for the terminal pins is made up of a stainless steel base 1 having front and back surfaces parallel to each other and a wiring board 7 perpendicular to the wiring board 7. Terminal pin 8 to be joined (pin diameter 0.2 m
m, length 3 mm, head diameter 0.5 mm), and a different pad arrangement in which terminal pin insertion block 2 is temporarily held and terminal pins 8 are formed on wiring board 7 by overlapping terminal pin insertion block 2. Corresponding to the terminal pin mask 3, the terminal pin insertion block 2 is locked to the base body 1, and the wiring board 7 opposed to the terminal pin insertion block 2 is regulated and positioned. It is composed of a fixing pin 5 for fixing.

Further, in order to pre-solder the terminal pins, the terminals vertically joined to the wiring board 7 fixed to the base 1 as shown in the side sectional views of FIGS. The preliminary solder mask 6 is formed by inserting and masking only the tip of the pin 8.

Next, each section will be described in detail. In FIG. 1, the base body 1 has a square hole 1a through which a terminal pin insertion block 2 is movably fitted in a central portion thereof.

The terminal pin insertion block 2 is made of stainless steel having the same thickness as that of the base 1, and is movably fitted and held in the square hole 1a of the base 1 to cover the maximum area of the pad arrangement of the wiring board 7. Terminal pin insertion blind hole 2a (hole diameter 0.24 mm) perpendicular to the front and back surfaces at all intersections on the grid with a pitch equal to the minimum pitch formed, for example, 0.635 mm
To drill. The inlet of the terminal pin insertion blind hole 2a is chamfered (counterhole diameter 0.45 mm) so that the terminal pin can be easily inserted.

The terminal pin mask 3 is made of a stainless plate material having a thickness of 0.5 mm. As another example, when the wiring board pads are formed on the wiring board at all intersections, the terminal pin mask 3 has terminal pins at all the intersections on the grid as shown in FIG. Passage hole 3a
(Hole diameter 0.5 mm) is bored, and the terminal pin 8 is inserted into the terminal pin insertion blind hole 2a communicating from the terminal pin passage hole 3a to the lower side.

In another embodiment, the pad is 0.6
When the wiring board formed at all the intersections on the grid of twice the arrangement pitch of 35 mm, that is, 1.27 mm, is targeted, it is shown in the unit plan view of FIG. 3 (a) and (b) and its side view. The terminal pin mask 3-1 has an array pitch of 1.27 mm.
Terminal pin passage hole 3a (hole diameter 0.5m
m) is drilled.

As shown in the plan view of FIG. 4, this terminal pin mask 3-1 is fitted into the square hole 1a of the base 1 when the terminal pin is inserted and is overlaid on the terminal pin insertion block 2. Since the terminal pin insertion blind hole 2a (solid line) and the terminal pin passage hole 3a (solid line), which require terminal pins by overlapping, communicate with each other, insert the terminal pin only there to correspond to the pad arrangement of the wiring board. You can Since the terminal pin insertion blind hole 2a (dotted line) that does not require a terminal pin is closed, the terminal pin cannot be inserted.

Alternatively, as still another embodiment, the terminal pins are first inserted into all the terminal pin insertion blind holes,
Other terminal pins may be pulled out from the terminal pin passage holes while covering the necessary terminal pins. That is, as shown in the plan views of FIGS. 5 (a) and 5 (b) and the side views thereof, the terminal pin mask 3-2 is opposite to the case of FIGS. After inserting the terminal pin, a terminal pin passage hole 3a is formed for extracting an unnecessary terminal pin.

When using this terminal pin mask 3-2, as shown in the plan view of FIG. 6, after inserting the terminal pins into all the terminal pin insertion blind holes 2a first, the terminal pin mask 3-2 is used. By covering the pins and turning them upside down to drop only the terminal pins that match the terminal pin passage holes 3a, the remaining terminal pins can be made to correspond to the pad arrangement of the wiring board.

Returning to FIG. 1, the locking tool 4 is made of a stainless plate material in an L shape as shown in FIG.
The terminal pin insertion block 2 fixed by c and movably fitted in the square hole 1a of the base 1 is locked so as not to fall out from the square hole 1a.

The fixing pin 5 is made of a stainless rod, and is shown in FIG.
As shown in the exploded view of the main part, the shaft portion 5a having a different diameter D for each wiring board 7 corresponding to the size of the wiring board 7 and the small diameter of the lower end of the shaft portion 5a formed with the common size for each fixing pin Part 5
b and the mounting screw portion 5c, and a large diameter portion 5d of, for example, D + 3 mm, which is larger than the diameter D of the shaft portion 5a formed at the upper end of the shaft portion for engaging with the edge of the wiring board 7 and pressing and fixing it to the base body 1. Prepare on one axis.

The fixing pin 5 is prepared by changing the diameter of the shaft portion 5a for each size of the wiring board 7. However, the diameter of the shaft portion 5a is fixed to the wiring board 7 of the largest size fixed to the base 1. The fixing pin 5 having the smallest diameter corresponds thereto, and mounting base holes 1b corresponding to two places on one side of the wiring board 7 orthogonal to each other and one place on the other side (see (b) of FIG. 1) are drilled in the base body 1. Set up.
Even if the size of the wiring board 7 is different, the fixing pin 5 corresponding to the wiring board 7 commonly uses the mounting boss hole 1b. For the fixing pin 5, the mounting screw portion 5c is inserted into the mounting fool hole 1b and is fixed by the nut 5e.

At this time, the small-diameter portion 5b is attached to the mounting hole 1b.
Is fitted into a fitting hole 1b-1 concentrically formed on the upper part of the wiring board, and the edge surface of the wiring board 7 is abutted against the shaft portion 5a to regulate three points for accurate positioning, and the large diameter portion 5d is wired. The board 7 is fixed by engaging and pressing the upper surface of the edge of the board 7. The change from the shaft portion 5a to the small diameter portion 5b in the fixed pin 5 can be realized by adjusting the insertion depth of the fixed pin 5 inserted into the base 1.

By replacing the fixing pin 5 with another fixing pin, it is possible to position and fix the wiring board 7 having different dimensions by the diameter difference of the shaft portion 5a. In the side sectional views and the perspective views of FIGS. 2 (a) and 2 (b), the pre-solder mask 6 is made of a stainless plate material or a carbon plate material as shown in FIG. The solder creeping-up restricting holes 6a (hole diameter: 0.6 mm) are vertically formed at all intersections on the grid having a pitch equal to, for example, 1.27 mm. Then, as shown in the figure (b), the pre-solder mask 6 is provided with positioning holes 6b to be inserted into the positioning pins 1d vertically provided on the base body 1 on both sides, and the mounting is carried out in accordance with FIG.
The mounting screw 1c of the locking tool 4 shown in FIG.

Next, the joining of terminal pins using the joining jig having the configuration shown in FIG. 1 will be described with reference to the side sectional views of FIGS. 8 (a), (b) and (c). First, in FIG. 1A, the terminal pin mask 3 is put on the terminal pin insertion block 2 which is fitted in the square hole 1a of the base body 1 and is prevented from coming off by the locking tool 4. Terminal pin insertion blind hole 2 communicating downward from the terminal pin passage hole 3a
Insert the terminal pin 8 into a. The figure shows the state after inserting the terminal pins. When the insertion of the terminal pins 8 is completed, the terminal pin mask 3 is removed. It should be noted that solder balls 9 are attached to the head joint surface of the terminal pins 8 in advance.

In the next figure (b), a wiring board 7 corresponding to this terminal pin arrangement and three fixing pins 5 corresponding to this wiring board 7 are prepared. This fixing pin 5 is used as the base 1
Through the fitting hole 1b-1 and the mounting fool hole 1b, the wiring board 7 is positioned by abutting the shaft portion 5a of the fixing pin 5, and the upper surface of the edge of the wiring board 7 is pressed by the large diameter portion 5d. , The wiring board 7 is fixed to the base 1 by being stopped with the nut 5e.

In the next figure (c), the whole is turned upside down and the terminal pin insertion block 2 is moved downward by its own weight to apply a load (the own weight of the terminal pin insertion block 2) to the terminal pin 8. The head of the terminal pin 8 is brought into contact with the pad 7a of the wiring board 7.

In this state, the solder is heated and reflowed in a reflow heating furnace (not shown) to obtain the wiring board 7 in which the terminal pins 8 are vertically joined to the pads 7a by the solder balls 9. The terminal pin insertion block 2 is removed by loosening the locking tool 4.

Further, the deposition of the preliminary solder on the terminal pins will be described with reference to the side sectional views of FIGS. 9 (a) and 9 (b). Subsequently, since the wiring board to which the terminal pins are joined is connected to the main board (not shown), it is necessary to apply preliminary solder to the tips of the terminal pins.

In FIG. 1 (a), a preliminary solder mask 6 corresponding to the pad arrangement of the wiring board 7 is prepared and attached to the base 1 with the attaching screws 1c. The positioning is performed by inserting the positioning hole 6b formed in the preliminary solder mask 6 into the positioning pin 1d protruding from the surface of the substrate 1. then,
The dimensional relationship is designed in advance so that the tip end of the terminal pin 8 protrudes through the solder creeping-up regulation hole 6a by about 0.8 mm and the lower portion is masked.

Then, the state of (a) is turned upside down and immersed in a solder dipping device (not shown) for about 1 mm to deposit the preliminary solder on the tip of the terminal pin 8. The solder creeping-up regulation hole 6a where the terminal pin does not come out
Since the material is stainless steel and the immersion depth is shallow, there is no particular clogging.

The same figure (b) at the end shows the wiring board 7 with the terminal pins 8 having the pre-solder 10 adhered to the tips thereof hung vertically after being removed from the substrate. As described above, in the joining jig having the above-described configuration, the base body, the terminal pin insertion block, and the pre-solder mask can be commonly used even if the types of wiring boards (various sizes, different pad arrangements) are different, and the size of the wiring board is large. When the pad arrangement is different, another fixing pin having a shaft diameter corresponding thereto can be easily replaced by selectively replacing the terminal pin mask when the pad arrangement is different.

Further, since the terminal pin mask and the preliminary solder mask may be thin plates, they can be processed more easily than the conventional thick brazing blocks and preliminary solder blocks, so that the manufacturing cost thereof can be reduced and the substrate Since the terminal pin insertion block and the terminal pin insertion block can be used in common, the number of types is extremely small, and their management and gluing work can be facilitated.

Further, the preliminary solder mask and the terminal pin mask are made of a thin plate material so that they can be processed much more easily than the conventional brazing block and the preliminary solder block, and the manufacturing cost thereof can be reduced. it can.

Further, since the substrate, the terminal pin insertion block and the spare solder mask can be commonly used for different wiring boards, the number of kinds of components of the joining jig can be extremely reduced as compared with the conventional one, and their management is easy. Therefore, the work efficiency can be improved.

[0047]

As described in detail above, according to the present invention,
The bonding jig has its constituent parts made common to different sizes of the wiring board and the pad arrangement to facilitate processing,
When the terminal pins are joined to the wiring board, the working efficiency of the joining and the manufacturing cost of the jig can be improved, which is extremely useful in the industry.

[Brief description of drawings]

FIG. 1 is a side sectional view and a perspective view of a terminal pin joining jig according to an embodiment of the present invention.

FIG. 2 is a side sectional view and a perspective view of a pre-soldering jig according to the present invention.

FIG. 3 is a plan view and a side view of a terminal pin mask of another embodiment according to the present invention.

FIG. 4 is a plan view showing jig insertion of FIG.

FIG. 5 is a plan view and a side view of a terminal pin mask according to still another embodiment of the present invention.

FIG. 6 is a plan view showing the jig insertion of FIG.

7 is an exploded view of main parts of the fixing pin of FIG.

FIG. 8 is a side sectional view showing the joining of the terminal pins in the order of steps according to one embodiment of the present invention.

FIG. 9 is a side sectional view showing the step of depositing the preliminary solder in one embodiment according to the present invention.

FIG. 10 is a side sectional view and a perspective view of a joining jig according to a conventional technique.

FIG. 11 is a side sectional view showing the step of joining the terminal pins according to the prior art.

FIG. 12 is a side sectional view showing the step of depositing the preliminary solder according to the conventional technique.

[Explanation of symbols]

 1 Base 2 Terminal Pin Insert Block 2a Terminal Pin Insert Blind Hole 3 Terminal Pin Mask 3a Terminal Pin Passing Hole 4 Locking Tool 5 Fixing Pin 5a Shaft 5d Large Diameter 5e Nut 6 Pre-Solder Mask 6a Solder Crawling Rise Control Hole 7 Wiring Board 8 terminal pins

Claims (2)

[Claims] 1. A base body having front and back surfaces parallel to each other, and movably fitted to and held by the base body to cover all of the maximum area of a pad arrangement of a wiring board, and all of them on a lattice with a minimum pitch. A terminal pin insertion block having a terminal pin insertion blind hole for vertically holding the terminal pin at the intersection, and the terminal pin corresponding to a different pad arrangement of the wiring board, which is overlapped with the terminal pin insertion block Alternatively, a terminal pin mask having a terminal pin passage hole that is selectively inserted as necessary, a fixing pin that regulates and fixes an edge of a wiring board facing the terminal pin insertion block to the base body, and a fixed pin to the base body And a pre-solder mask having a solder creeping-up regulation hole corresponding to a terminal pin insertion blind hole of the terminal pin insertion block. Ingredients. 2. The fixing pin includes a shaft portion having a size according to a different size of the wiring board, a large diameter portion for engaging an edge of the wiring board, and a small diameter having a common diameter for positioning on the base body. 2. The terminal pin joining jig according to claim 1, wherein the portion and the screwing means are provided on one axis.