JP2001094241A - Ultrasonic solder application device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a solder-applying work for a work with melting solder contained in a solder tank, with speed and sure. SOLUTION: An ultrasonic solder application device 10 containing melted solder is provided with a solder tank 11 in which ultrasonic vibrators 12 and 13 are placed, and a transporting chain 15 placed on the solder tank 11 in which holding jigs 16 for holding a work W are fitted at fixed pitches. A first reciprocating unit 18 is provided on an inlet port side of the solder tank 11 in parallel with the transporting chain 15, and a second reciprocating unit 22 is provided on an outlet port side of the solder tank 11 in parallel with the transporting chain 15. The first reciprocating unit 18 and the second reciprocating unit 22 move synchronously with the transporting chain 15 at reciprocation, and the work W of the first reciprocating unit 18 is surely transferred to the holding jig 16 of the transporting chain 15, and further the work W of the holding jig 16 is received with the second reciprocating unit 22 with sure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic solder applying apparatus for applying solder to radial leads of electronic parts (work) such as transistors, diodes and ICs by ultrasonic waves.

[0002]

2. Description of the Related Art Conventionally, transistors, diodes, I
When solder is applied to an electronic component (work) having a radial type lead, such as C, several electronic components (work) are collectively immersed in the flux filled in the box, and the lead surface of the electronic component is activated. I have.

Next, the leads of the electronic component are immersed in the solder in the solder bath, and then the leads of the electronic component are washed with water to remove the flux from the leads.

[0004]

As described above, when solder is applied to a lead of an electronic component, the lead is immersed in a flux. On the other hand, as a method of applying solder without immersing the lead in the flux, a method of providing an ultrasonic vibrator in a solder bath and ultrasonically vibrating the solder in the solder bath has been developed.

In such a solder coating method, it is required that the electronic component can be reliably supplied to the solder tank and can be reliably discharged after the solder coating.

The present invention has been made in view of the above points, and has as its object to provide an ultrasonic solder coating apparatus capable of reliably supplying and discharging an electronic component to and from a solder bath.

[0007]

According to the present invention, there is provided a solder bath in which molten solder is accommodated and an ultrasonic vibrator is arranged;
It has a transfer chain, which is arranged on a solder tank and has holding jigs for holding the work at a constant pitch, and a first holding section which is arranged in parallel with the transfer chain at the entrance side of the solder tank and holds the work. A first reciprocating unit that reciprocates the work while transferring the work to the holding jig; and a second holding unit that is arranged in parallel with the transport chain at the outlet side of the solder bath and holds the work. And a second reciprocating unit that reciprocates while receiving the first and second reciprocating units, wherein the first reciprocating unit and the second reciprocating unit are movable in synchronization with the transport chain during forward movement. It is.

The first reciprocating unit and the second reciprocating unit are both reciprocally movable and move synchronously with the transport chain during the forward movement, so that the transport chain is moved from the first holding portion of the first reciprocating unit. And the work of receiving the work from the holding jig of the transport chain to the second holding portion of the second reciprocating unit can be easily and reliably performed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of an ultrasonic solder coating apparatus according to the present invention.

As shown in FIGS. 1 and 2, the ultrasonic solder coating apparatus 10 applies solder to a lead L of an electronic component (work) W having a radial lead, such as a transistor, a diode, an IC, or the like. As shown in FIG. 9, the work W has five leads L, but in other drawings, the work W having the leads L is shown in a simplified manner.

As shown in FIGS. 1 and 2, an ultrasonic solder coating apparatus 10 accommodates molten solder and has a solder tank 11 provided with ultrasonic vibrators 12 and 13, and a work tank disposed on the solder tank 11. A plurality of holding jigs 16 for holding W are provided with a transfer chain 15 arranged at a constant pitch.

A first reciprocating unit 18 is arranged on the entrance side of the solder tank 11 in parallel with the transport chain 15. As shown in FIG. 7, the first reciprocating unit 18
Has a first holding portion 18a for holding the work W and transfers the work W to the holding jig 16.
5 can be reciprocated along the transport direction.

A work supply unit 17 for supplying a large number of works W is provided near the first reciprocating unit 18, and the work W of the work supply unit 17 is sucked near the work supply unit 17 and the first reciprocating unit 18. A transfer device 19 for transferring the data to the first reciprocating unit 18 is provided.

On the other hand, a second reciprocating unit 22 is arranged on the exit side of the solder bath 11 in parallel with the transport chain 15. As shown in FIG. 8, the second reciprocating unit 22 has a second holding portion 22 a for holding the work W, receives the work W of the holding jig 16, and reciprocates along the transfer direction of the transfer chain 15. It is movable. The second reciprocating unit 22 is located near the second reciprocating unit 22.
Is provided with a work discharge section 21 for discharging the work W received by the work.

As shown in FIGS. 7 and 8, each of the first reciprocating unit 18 and the second reciprocating unit 22 has a second holding portion 18a and a second holding portion 22a for holding the work W, The workpiece W moves in synchronization with the transport chain 15 and can easily transfer and receive the workpiece W to and from the holding jig 16 on the transport chain 15 side.

Referring now to FIGS. 5 and 6, the transfer chain 1 will be described.
5, a first reciprocating unit 18, and a second reciprocating unit 22
Will be described. As shown in FIG. 5, the driving force of the motor 30 is transmitted to the driving shaft 31. The drive shaft 31 is provided with transmission pulleys 32, 33, and 34. The transmission pulley 32 is connected to a drive pulley 46 of the transport chain 15 via a drive unit 36 having a pulley 35.

The transmission pulley 33 is connected to a differential gear mechanism 39 and a pulley 40 via a pulley 37, and the pulley 40 is connected to a drive unit 41 and a pulley 41b via a pulley 41a. The pulley 41b is the pulley 4
2 are connected to the driving pulleys 43 of the first reciprocating unit 18 and the second reciprocating unit 22.

Further, the transmission pulley 34 has an index 4
The index 45 is connected to a differential gear mechanism 39 via a pulley 38.

When the drive shaft 31 is rotated by the drive of the motor 30, when the drive shaft 31 makes one rotation (360 °),
The transport chain 15 moves by the arrangement pitch (50.8 mm) of the holding jig 16 via the transmission pulley 32, the pulley 35, the driving unit 36, and the driving pulley 46 (FIG. 6A).

During this time, the rotation of the drive shaft 31 causes the differential gear mechanism 39, the drive unit 41, the pulley 42 and the drive pulley 4
3, the first and second reciprocating units 18 and 22 are also 240 °
6 moves forward in synchronization with the transport chain 15 (FIG. 6).
(C)). In this case, the index 45 is in the off state.

However, when the drive shaft 31 rotates up to 240 °, the index 45 is turned on, and the rotation of the drive shaft 31 is transmitted from the transmission pulley 34 to the differential gear mechanism 39 via the index 45, and the rotation from the index 45 is reversed. The rotation is transmitted to the first and second reciprocating units 18 and 22 (FIG. 6B).

Therefore, when the rotation of the drive shaft 31 reaches 240 ° or more, the first and second reciprocating units 18 and 22 return to their original positions (FIG. 6C).

Next, referring to FIG. 3 and FIG.
The holding jig 16 for the work W provided on the work 5 will be described.

The holding jig 16 is rotatably attached to the transport chain 15 via a rotating shaft 25. The holding jig 16 rotates about the rotating shaft 25, and moves vertically. Can take horizontal position. Holding jig 1
Reference numeral 6 denotes a jig body 16a and a holder 16b slidably attached to the jig body 16a. The holder 16b is urged by a spring 29 toward the rotation shaft 25.

At the tip of the holder 16b, a fixing portion 26 is provided.
And a swing portion 27 that swings with respect to the fixed portion 26 and holds the work W, and the swing portion 27 is urged in the closing direction by a spring 28.

Next, the operation of the present embodiment having such a configuration will be described.

As shown in FIGS. 1 and 2, first, a plurality of works W are supplied from the reversing supply section 51 to the work supply section 17.
The workpiece W is supplied after being inverted by 0 °
Is then sucked by the transfer device 19 and sent to the first holding portion 18a of the first reciprocating unit 18.

During this time, the first reciprocating unit 18 moves in synchronization with the transport chain 15 by the drive mechanism shown in FIG. 5 (FIGS. 6A, 6B, and 6C). That is, the transport chain 15
And the first reciprocating unit 18 moves synchronously to the right in FIG.

When the first reciprocating unit 18 moves in synchronization with the transport chain 15 during the forward movement, the holding jig 16 attached to the transport chain 15 rotates about the rotating shaft 25 and rotates. 16 takes a horizontal position, and the workpiece W faces the first reciprocating unit 18 side. At the same time, the swing part 27 of the holding jig 16 swings with respect to the fixed part 26 against the force of the spring 28, and the fixed part 26 and the swing part 27 are opened (FIGS. 3 and 4).

Next, the first holding portion 1 of the first reciprocating unit 18
8a is sent out to the holding jig 16 side of the transport chain 15 by the sending device 20 and the holding jig 16
Is inserted between the fixed portion 26 and the swinging portion 27 of the base. Thereafter, the swinging portion 27 is moved by the force of the spring 28 to the fixed portion 26.
To the workpiece W between the fixed portion 26 and the swing portion 27.
And the delivery of the work W from the first reciprocating unit 18 to the holding jig 16 is completed.

When the transfer of the work W is completed, the first reciprocating unit 18 moves back and returns to the original position.

Thereafter, the holding jig 16 rotates about the rotation shaft 25, the holding jig 16 takes a vertical position, and the work W faces downward. The work W held by the holding jig 16 moves toward the solder bath 11 with the movement of the transport chain 15, and the holding body 16b of the holding jig 16 slides downward with respect to the jig body 16a to hold the work. The lead L of the work W held at the tip of the body 16b is immersed in the molten solder in the solder bath 11.

The ultrasonic vibrators 12 and 13 are provided in the solder bath 11.
Are arranged, the molten solder can be effectively applied to the leads L of the work W. In this case, the work W
It is not necessary to apply a flux to the lead L in advance.

Next, the holding body 16b of the holding jig 16 slides upward with respect to the jig body 16a, and the work W
Pulled from the molten solder.

Next, when the holding jig 16 comes close to the second reciprocating unit 22 with the movement of the transport chain 15, the second reciprocating unit 22 moves forward and synchronizes with the transport chain 15 to the right in FIG. Move to. At this time, the holding jig 16 rotates about the rotation shaft 25, and the holding jig 16 takes the horizontal position again, and the work W faces in the horizontal direction. Thereafter, the swing portion 27 of the holding jig 16 swings against the force of the spring 28, and the fixed portion 26 and the swing portion 27 are opened.

Next, the work W on the holding jig 16 side is received and held by the second holding portion 22a of the second reciprocating unit 22, and the work W held by the second holding portion 22a of the second reciprocating unit 22 is moved to the second position. The two reciprocating units 22 are drawn in a direction perpendicular to the forward movement direction and sent to the work discharge unit 21. The work W on the work discharge unit 21 is then discharged to the reverse discharge unit 52 while being inverted.

When the work W held by the holding jig 16 is received by the second reciprocating unit 22 and sent to the work discharge unit 21, the second reciprocating unit 22 moves back and returns to the original position. .

As described above, according to the present embodiment, the first reciprocating unit 18 and the second reciprocating unit 22 reciprocate and move synchronously with the transport chain 15 during the forward movement. Transfer chain 1 for workpiece W
5 is transferred to the holding jig 16 by the first reciprocating unit 18 or the work W held by the holding jig 16 is
The work to be received by the reciprocating unit 22 toward the work discharge unit 21 can be easily and reliably performed.

[0040]

As described above, the work can be reliably transferred from the first reciprocating unit to the holding jig side of the transfer chain, and the work of the holding jig of the transfer chain can be transferred to the second jig.
It can be reliably received by the reciprocating unit. Therefore, the solder application operation performed by holding the work by the holding jig of the transfer chain and immersing it in the solder tank can be performed quickly and reliably.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an ultrasonic solder coating apparatus according to the present invention.

FIG. 2 is a side view showing an embodiment of the ultrasonic solder coating apparatus according to the present invention.

FIG. 3 is a front view showing a transport chain and a holding jig.

FIG. 4 is a side view showing a transport chain and a holding jig.

FIG. 5 is a diagram illustrating a driving mechanism of a transport chain, a first reciprocating unit, and a second reciprocating unit.

FIG. 6 is a diagram showing a moving distance of a first reciprocating unit and a second reciprocating unit.

FIG. 7 is an enlarged plan view showing a first reciprocating unit.

FIG. 8 is an enlarged plan view showing a second reciprocating unit.

FIG. 9 is an enlarged view showing a work.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ultrasonic solder application apparatus 11 Solder tank 12, 13 Ultrasonic transducer 15 Transfer chain 16 Holding jig 17 Work supply unit 18 First reciprocating unit 19 Transfer device 21 Work discharge unit 22 Second reciprocating unit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B23K 1/08 B23K 1/08 C 5F067 B // B05C 3/20 B05C 3/20 H01L 23/48 H01L 23/48 K 23/50 23/50 EF term (reference) 4D075 AB07 AB32 BB13Z CA47 DA11 DA15 DB01 DC22 EA05 4E080 AA03 AB01 BA11 DA05 DB08 DC02 EA02 4F040 AA12 AB20 BA36 BA47 CB18 4F042 AA06 DF18 DF29 5E319 CD25 5F067 DD

Claims (3)

[Claims] 1. A transfer chain which accommodates molten solder and has an ultrasonic vibrator disposed therein, a transfer chain which is disposed on the solder tank and has a holding jig for holding a work at a constant pitch, and A first reciprocating unit which is arranged in parallel with the transfer chain on the inlet side of the tank, has a first holding portion for holding the work, transfers the work to a holding jig and reciprocates, and transfers the work on the outlet side of the solder tank; A second reciprocating unit that is arranged in parallel with the chain and that has a second holding portion for holding the work, receives the work from the holding jig, and reciprocates; An ultrasonic solder coating apparatus characterized in that it can be moved in synchronization with a transport chain when moving. 2. A work supply unit for supplying a work is provided near the first reciprocating unit, and a transfer device for transferring the work of the work supply unit to the first reciprocating unit is provided. The ultrasonic solder coating device according to claim 1, wherein 3. A supercharger according to claim 1, further comprising a work discharge section for discharging the work near the second reciprocating unit, wherein the second reciprocating unit receives the work of the holding jig and sends it to the work discharge section. Sonic solder application equipment.