JPH0334879B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention involves inserting lead pins in an unspecified number of combinations into holes in a carbon substrate jig used for brazing during the production of pin grid packages. This relates to an automatic pin insertion machine for.

(Prior Art) When manufacturing a pin grid package, it is necessary to braze lead pins at predetermined positions on a package board (wiring board). Because the number and position of these lead pins requires a considerable number of combinations, it is difficult to make each pin stand upright at regular intervals and at a predetermined combination position with respect to the board surface, and generally, each combination Many brazing jigs for holding pins made of materials such as carbon were prepared and the pins were brazed to the package board.

Conventionally, the work of inserting pins into the brazing jig for manufacturing pin grid packages has been carried out by manually inserting the pins one by one into the holes.

(Problems to be Solved by the Invention) As mentioned above, pin insertion work has traditionally been done manually, which takes time and efficiency varies depending on the skill level of the work. It has the drawback of poor performance and the need for a large number of workers, as well as the fact that the pin placement position is different for each package, and the production of a wide variety of products in small quantities requires a variety of jigs, resulting in an enormous cost. .

The purpose of the present invention is to solve the above-mentioned problems and to enable pins to be planted in many different positions with one type of jig even when many types of lead pin planting positions are required, without requiring much manpower. The purpose of the present invention is to provide an automatic pin insertion machine that can efficiently insert pins into a brazing jig in a short time.

(Means for Solving the Problems) The automatic pin insertion machine of the present invention includes a stand, a swinging mechanism and a vibration mechanism attached to the stand, and a swinging mechanism and a vibration mechanism to swing back and forth from side to side. A vibrating box-shaped jig fixing plate, a vacuum pump connected to the bottom of the jig fixing plate via a vacuum suction tube, and a carbon substrate jig having a large number of pin holes placed on the jig fixing plate. a metal mask having pin holes corresponding to the number of pins of the wiring board placed on the carbon substrate jig, a metal mask frame for holding lead pins provided around the metal mask, and the vacuum pump. and a control device for controlling pressure reduction and repeated atmospheric pressure operations, as well as rocking and vibration operations by the rocking mechanism and the vibration mechanism, and a control device that controls a large number of lead pins held on the metal mask through the pin holes of the metal mask. The method is characterized in that the pins are suctioned and planted into the pin holes of the carbon substrate jig, and then the metal mask is changed for pins of different shapes, and the metal masks are applied to other pin holes that do not have pin holes.

(Function) Hereinafter, the present invention will be explained in detail with reference to the drawings. FIG. 1 is a perspective view showing the configuration of an example of an automatic pin insertion machine of the present invention. In the drawing, a large number of nail head type lead pins 1 are housed in a metal mask frame 2 around a metal mask, and are able to flow over a metal mask 13 in contact with a carbon substrate jig. The two metal mask frames 2 constituted by a mask holding jig 31 and a mask frame 32 are made of a material such as transparent acrylic, and are mounted on a jig fixing plate 5 with clamps 4. Three carbon substrate jigs 3 are fixed to a jig fixing plate 5 for each metal mask frame 2. The jig fixing plate 5 is pivotally supported by a swinging arm 6, and a swinging shaft 7, a swinging mechanism 8, and a swinging arm 6 are controlled by a swinging motor (not shown).
The structure is such that it swings left and right in the direction of arrow A. This swinging operation is for causing the pins 1 in the metal mask frame 2 to flow over the metal mask 13.

Furthermore, a vibration mechanism 35 driven by a vibration motor (not shown) is connected to the jig fixing platen 5, and is configured to vibrate in the direction of arrow B, which is 90 degrees from the rocking direction. This vibration operation is intended to cause the pins 1 to disperse and flow uniformly in the metal mask frame 2. At the same time, by providing a vacuum tube 10 on the lower surface of the metal mask frame 2 of the jig fixing plate 5 and connecting it to a vacuum pump 11, the lead pins 1 are drawn into the holes of each carbon substrate jig 3 through the pin holes of the metal mask. Therefore, vacuum suction is intermittently performed by a vacuum pump 11 via a vacuum suction tube 10. In addition, the swing mechanism 8 is mounted on a pedestal 9.
A control device 36 for controlling the movements of the swing motor, vibration motor, and vacuum pump 11 is incorporated inside the pedestal 9 .

FIG. 2A shows the carbon substrate jig 12. FIG. In this embodiment, the carbon pin grid top jig 14 has pin holes 15 corresponding to all locations on the ceramic substrate where pin grids may exist. Each hole 15 has a tapered surface as shown in the figure, so that the nail head of the pin can be properly accommodated. Each carbon pin grid top jig 14 has a size that allows it to fit into each section of the carbon frame jig 16, which has a plurality of section frames corresponding to the positions of the ceramic substrate, and is sized in one direction, that is, toward the front in the drawing. It has a configuration that allows it to be installed only from the side. The carbon frame jig 16 is made of ordinary carbon and has jig positioning guide holes 17 at both longitudinal ends. Carbon frame jig 1 mentioned above
6 and a carbon pin grid top jig 14 constitute a carbon substrate jig 12. In addition,
The carbon pin grid jig 14 is made of carbon, which has a coefficient of thermal expansion that is almost the same as that of the ceramic substrate, so the difference in thermal expansion during brazing may cause the pin to bend or move out of position. It will not sag if it is not brazed. Note that, of course, the carbon frame jig 16 and the carbon pin grid top jig 14 may be integrated.

FIG. 2B shows the metal mask 13. This metal mask 13 is provided with holes 18, which are formed only at necessary pin grid locations corresponding to, for example, the number and position of lead pins on the ceramic wiring board. Therefore, by positioning the metal mask 13 on the carbon substrate jig 12 using the metal mask frame 2, attaching it to the automatic pin insertion machine of the present invention, and inserting the pins, the pins of the carbon pin grid top jig 14 can be inserted. Pins can be attached only to necessary locations in the use holes 15. Metal mask 13 configured as described above
If you use , you can make only one type of carbon jig by making the same number of metal masks 13 corresponding to the pin positions of various logic ICs and changing the metal masks 13 according to the positions of the various pin grids. can be used to manufacture pin grid packages for various logic ICs.

(Example) Using the automatic pin insertion machine configured as described above, all carbon board jigs 12 each having holes corresponding to the positions and number of lead pins of three wiring boards were assembled as shown in the assembly order in FIG. A metal mask 13 having the same number and position of pins as the wiring board is placed on the carbon board jig 12, and an acrylic mask consisting of a mask holding jig 31 and a mask frame 32 is mounted on the jig fixing plate 5. The metal mask frame 2 was fixed, a large number of lead pins were inserted into the frame, and automatic pin insertion work was performed.

At this time, the rocking, vibration, and automatic suction operations were controlled as follows. First, vibration in the direction of arrow B in FIG. 1 for dispersion of pins and uniform flow within the metal mask frame was carried out during the entire operation. Also, arrow A
Rather than the above-mentioned vibration operation in the direction, a swing operation with a slower period was performed continuously. As for the vacuum suction operation, the vacuum suction operation is performed continuously during the rocking operation, but at the stationary point where the rocking direction is changed, this vacuum suction operation is temporarily interrupted to release normal pressure, and then the rocking operation is performed in the opposite direction. At that time, an intermittent suction operation was performed in which the normal pressure was closed again and vacuum suction was performed. This intermittent suction is performed when lead pin 1 is a nail head type lead pin.
This is to use vacuum suction to bring down the pin whose nail head is stuck in the hole on the carbon substrate jig 3, causing it to be in an inverted state, and return it to the normal pin insertion position. At this time, since the jig fixing platen 5 is tilted and the pressure is released from reduced pressure to normal pressure, the pin whose nail head portion is stuck in the hole is also swept away by the flow of the pin and inside the metal mask frame 2. You will return to the place where the other pins are gathered.

When the pin filling rate was examined after the above-mentioned operation was performed continuously for 2 minutes, a filling rate of 99.9% was obtained.

The present invention is not limited only to the embodiments described above, and can be modified and changed in many ways. For example, in the embodiments described above, the metal mask frame 2 was made of a transparent acrylic plate, but the metal mask frame 2 may be made of other opaque materials. Further, in this embodiment, pins were inserted into a total of six carbon substrate jigs having holes corresponding to three ceramic substrates at the same time, but the number of these jigs can of course be arbitrarily selected.

(Effects of the Invention) As is clear from the above detailed explanation, the automatic pin insertion machine of the present invention allows pins to be inserted into a large number of carbon substrate jigs in a single time without any manual effort. If the efficiency of insertion increases, the cost of the product will be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of an example of an automatic pin insertion machine of the present invention, FIGS. 2A and B are plan views showing an example of a carbon substrate jig and metal mask used for brazing, and FIG. The figure is a perspective view showing one embodiment of the present invention. 1...Lead pin, 2...Metal mask frame, 3...
Carbon substrate jig, 4... Clamp, 5... Jig fixing plate, 6... Swinging arm, 7... Swinging shaft, 8... Swinging mechanism, 9... Frame, 10... Decompression suction tube, 11...
Vacuum pump, 12... Carbon substrate jig, 13... Metal mask, 35... Vibration mechanism, 36... Control device.

Claims (1)

[Claims] 1. A mount, a rocking mechanism and a vibration mechanism attached to the mount, a box-shaped jig fixing plate that vibrates back and forth while rocking from side to side due to the rocking mechanism and vibration mechanism, and a jig fixing plate attached to the bottom of the jig fixing plate. A vacuum pump connected via a vacuum suction tube, a carbon substrate jig with numerous pin holes placed on the jig fixing plate, and a number of pins corresponding to the wiring board placed on the carbon substrate jig. a metal mask having pin holes to
Control for controlling a metal mask frame for holding lead pins provided around the metal mask, depressurization and normal pressure repeated operations by the vacuum pump, and rocking and vibration operations by the rocking mechanism and vibration mechanism. The device includes a device, which suction-plants a large number of lead pins held on the metal mask into the pin holes of the carbon substrate jig through the pin holes of the metal mask, and then changes the metal mask to remove the pins of different shapes. An automatic pin insertion machine characterized by filling a metal mask into a pin hole that does not have a pin hole.