SU1433702A1 - Semi-automatic machine for sealing integral microcircuits by seam welding - Google Patents

Abstract

The invention relates to the field of welding and can be used to seal integrated circuits by resistance welding. The purpose of the invention is to improve the quality of welded joints and the performance of the process of assembling the cover and body by eliminating preliminary tacking. Before the first pair of welding rollers, mutually spring-loaded and negative-angle working surfaces are installed, guide rails align the cover to the width of the housing. There is a double-arm lever that transmits a reciprocating movement from the cam to a figure pusher that is synchronous with each link of the conveyor. The pusher accompanies each conveyor table, g with two of its protrusions is based on the table, and a working face, which also has a negative angle, aligns the edge along the length of the body. 4 il. (L

Description

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The invention relates to devices for resistance welding using roller electrodes, in particular, to equipment for sealing integrated microcircuits for roller seam welding.

The purpose of the invention is to expand the technological capabilities of the semi-automatic device, as well as to increase the reliability of its operation by automatically leveling all the chips on the chip case.

FIG. 1 shows a kinematic scheme of a semiautomatic device; in fig. 2 - semi-automatic, side view; in fig. 3 — Chip feed unit with guiding strips at the time of alignment of the key on the housing; in fig. A - figured pusher at the time of exposure with the chip cover and the body holder.

The semiautomatic machine for sealing the AL by roller welding consists of an actuator including an electric motor 1 (Fig. 1 and 2), a friction clutch 2 and a reducer 3, the base 4 in which the microchip feed unit is mounted in the form of an endless conveyor 5 composed of a set of links 6 connected by 7. In each link, a sleeve 8 is pressed in (FIGS. 2 and 3), and a holder 9 is installed in it with pins 10 designed to turn the holder. The conveyor is dressed in two twin sprockets — a drive 11 and a slave 12, and the drive sprocket, via three pairs of gears 13–15, mounted on shafts 16 and 17 and the camshaft 18, is connected to the gearbox 3,

On top of the base 4, two welding heads are fixed above the conveyor (FIGS. 1 and 2); First 19 - along the conveyor, second - welding head 20. Welding rollers 21 are mounted in each welding head, having a vertical reciprocating motion. In addition, on top of the base, in front of the first pair of welding rollers (first welding head), axles 22 (Fig. 3) have levers 23 which are spring-loaded to each other for a certain size, on which guide rails 24 are fixed, whose working surfaces have a negative angle ( bevels).

On the side of the base on the axis 25 (fip. And 2) there is a double-arm lever 26

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with roller 27 on one shoulder and with a fixed axis 28 on the other shoulder. The axle 28 of the freedom} 1o rotates the sleeve on which the figure pusher 29 and the lever 30 are rigidly fixed. At the free end of the lever 30 a console roller 31 is fixed, and the free end of the figure pusher 29 is made in the form of two projections - vertical A and horizontal B and working face In (Fig. 4) with a slope in the direction of the projections (negative angle of inclination of the face),

The lever 30 and the figure pusher 29 are constantly in any position with the spring 32 attached to the lever 26 and the lever 30, pulled down. Under the lever 30 on the side, on the base 4, the bar 33 is fixedly fixed, and above the latter, the bypass flag 35 (FIG.) Freely rotates on the axis 34.

Disks 36 and a cam 37 are mounted on the drive camshaft 18 of the chip supply unit. Photo sensors 38 are fixed on the base in contact with the discs 36 to control the operation of the welding heads. The base 4 by means of the legs 39 is mounted on the table 40 of the semiautomatic device in which the power supply unit and the control unit are mounted.

Conveyor movement direction

the chip supply unit is provided with guides 41, (Fig. 3). On each conveyor holder there is a table 42, which has a permanent magnet 43 inside.

The arrangement of the guide bars 24 relative to the conveyor in height is established by means of the gaskets 445 fixed on the vertical plates 45 of the base 4.

The spring 46 presses the levers 23 to each other about the size less than the width of the microcircuit case exposed by the stop 47 and the screw 48. The spring 49 constantly presses the pin 26 to the cam 37. The position 50 denotes the IC case, position 51 - the IC cover,

Semiautomatic works as follows.

Movement from the electric motor 1 (figs. 1 and 2) through the friction clutch 2, gear 3, a pair of gears 15 is transmitted to the camshaft 18 of the chip supply unit, on which the photosensor disks 36 are mounted, the cam 37. Next, the movement is through gear pairs 13 and 14 It is transmitted to the leading double sprocket 11 of the conveyor 5. The latter performs a constant, uniform motion.

The operator manually puts Kofipus 50 chips on a table 42 (Fig. 3 and 4) of each holder 9

conveyor belt

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body 50 lays down

the cover 51, the permanent magnet 43 holds the case of the microcircuit and the cover on it while the conveyor is moving. Before the first pair of welding rollers (welding head 9), the conveyor carries the case of chip 50 with key 51 between two guide bars 24 mounted on levers 23 mutually spring-loaded to the contact of screw 48 and stop 47, since the distance between bars 24 was less than width of the microcircuit case, then under the influence of the spring 46 of the bar 24, with a working edge having a negative angle, act on the rim of the IC case and on the cover 51, shift the key and orient it to the strictly rim of the case. At the same time, the negative angle of the working faces of the slats allows aligning the lid along the perimeter of the microcircuit case and eliminates the influence of the pls on the base of the body rim on the quality of orientation of the key relative to the microcircuit body.

The figure pusher 29, receiving movement from the cam 37, through a double-arm lever 26, makes a reciprocating motion, accompanying each table 42 with the body 50 and the lid 51 before starting welding. At the same time, the 4th pusher projection A lies on table 42 from above, protrusion B rests on the rear edge of the table, and the working edge B, which also has a negative angle, aligns the key 51 on the rim of the body 50 along the length of the body.

Thus, the slats 24 are oriented krška 51 across the width of the housing 50, and the figure pusher 29 - along the length. Figured pusher 29, interacting with protrusions A and B with the conveyor tables, and the working face B with the IC chip, in addition to aligning the key on the case, provides a kinematic connection of the microcircuit case

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with a constantly moving conveyor. During the return stroke of the lever 26 under the action of the spring 49, the lever 30 with its roller 31 attaches to the cut of the bypass flag 35, rises on it, lifting the figure pusher 29, which is carried by the lever 26 to the rear extreme position over the next table 42, not touching the key 51 and housing 30.

When the preset extreme position of the lever 26 is reached, under the action of the spring 32, the lever 30 by the roller 31 rolls off the trimming of the flag 35 and falls down onto the bar 33. When the lever 26 moves forward, the lever 30 slides along the plane of the bar 33 by the roller 31 In the bushing of the axle 28, the shaped pusher charges up the next little table 42, comes in contact with it by the projections A and B, and with the working face B aligns the cover 51 on the body 50. The roller 31 of the lever 30 moves under the overflow flag 35 and goes out from under it.

The flag 35, under the action of its weight, with its bevel again rests on the plane of the bar 33, the Figure pusher 29 and the lever 30 receive) from the movement from the cam 37 in such a way that the figure pusher 29 skips the next table with the body and the chip cover and then, dropping down, catches it, comes in contact with it and aligns the key on the body until the body enters the welding rollers 21 of the welding head 19. After the start of welding (the cover is actually tacked to the body), the figure pusher 29 getting started em return movement.

Thus, the figure pusher makes movement of the grab mechanism.

In front of the second welding head 20, the holder, with a pin 10 on the support, turns 90, while the table 42 with the body 50 and the cover 51 welded along the longitudinal sides also turn and enter the transverse sides under the rollers 21 of the second welding head 20, Boil cross seams. Upon further movement of the conveyor on the lower branch, the holders again come up with pins 10 on the support and turn 90 in the opposite direction (to the initial state). Magnets 1 + 3 tables 42 hold sealed enclosures; when each table 42 leaves the base 4, the operator manually removes the finished products. The disks 36 by means of photosensors 38 determine the beginning and end of welding on the first 19 and second 20 welding heads of each cycle.

The proposed semiautomatic device improves the quality of sealing chips and the performance of the assembly process.

Claims (1)

Invention Formula A semiautomatic device for sealing integrated circuits by roller welding, containing a drive with a camshaft, the base on which the feed unit of the microcircuits is mounted in the form of an endless conveyor with rotating holders of the parts to be welded, and welding rollers installed in pairs, characterized in that, in order to expand the technological capabilities of the semiautomatic machine, the chip supply unit is equipped with guide rails with bevels and mounted between them with the possibility of reciprocating movement by a driven figured pusher with two periodically interacting with the holder and one fixing the parts to be welded are protrusions, wherein the guide rails are pivotally mounted on the base from different sides of the conveyor so that they can be rotated in the plane of the holder and are spring-loaded to each other, and the plunger protrusion fixing the parts to be welded is bevelled. 50 28 23 g ; / sixteen 15 1 AND Figl