JP2003181633A - Method and device for soldering - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for soldering capable of accurately detecting and controlling feed rate of a solder wire to significantly improve productivity and quality in automatic soldering works of an electronic component. <P>SOLUTION: The soldering device: (1) allows a long sheet of solder wire 2 fed from a feed roller 3 to pass through a sawtoothed roller, irradiates light on the top side of the sawtoothed solder wire 11, allows a reflective photosensor 12 to detect the presence of its reflective light, and then transmit the detected signal to a control computer. Thus the control computer calculates feed rate of the sawtoothed solder wire 11 and also makes rotary control of the feed roller. The device (2) receives an unevenness signal of the sawtoothed solder wire detected by the reflective photosensor 12 to provide calculation of the feed rate and control for the sawtoothed solder wire. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a soldering method and a soldering apparatus. More specifically, the present invention relates to a soldering method and a soldering apparatus using an automatic soldering robot.

[0002]

2. Description of the Related Art Soldering work is a widely used work in all manufacturing industries. In the soldering work in the electronic component manufacturing industry, automatic soldering work using an automatic soldering robot is often used.

FIG. 4 is a front view showing a conventional soldering method and soldering apparatus.

In FIG. 4, 1 is a thread solder delivery bobbin, 2
Is a thread solder, 3 is a delivery roller, 4 is a tubular bending guide, 5 is a slack portion, 6 is a thread solder supply nozzle, 7 is a robot hand, and 8 is a robot soldering iron.

In the conventional soldering method and soldering device shown in FIG. 4, first, a driving source (not shown) is driven to operate the feeding roller 3, and thereby the yarn solder 2 is fed from the yarn solder feeding bobbin 1.

Next, the thread solder 2 delivered from the thread solder delivery bobbin 1 is delivered to the tubular bending guide 4. Here, in the thread solder 2 sent to the tubular bending guide 4, a slack portion 5 and the like often occur.

Next, the thread solder 2 fed into the tube-shaped bending guide 4 in this way is connected to the tip of the tube-shaped bending guide 4 and the thread solder supply nozzle 6 is connected.
It is sent out to the soldering part of the electronic component (not shown).

Next, when the robot hand 7 shown in FIG. 4 descends, the robot soldering iron 8 fixed to the lower end of the robot hand 7 removes the thread solder 2 sent to the soldering portion of the electronic component (not shown). It is heated and melted so that the soldering work can be automated.

Here, the amount of wire solder 2 delivered is controlled by controlling the rotational speed of the delivery roller 3.

[0010]

However, as described above, in the conventional soldering method and soldering apparatus, the thread solder 2 fed into the tube-shaped bending guide 4 is used.
However, there is a problem that the slack part 5 frequently occurs. Naturally, it is difficult to send the thread solder 2 in which the slack portion 5 is generated in the tube-shaped bending guide 4 from the thread solder supply nozzle 6 connected to the tip of the tube-shaped bending guide 4 at a constant delivery speed. .

As described above, when the thread solder 2 cannot be delivered from the thread solder supply nozzle 6 at a constant speed, the supply amount of the thread solder 2 to the soldering portion (not shown) varies, and as a result, the soldering due to insufficient supply of the thread solder is performed. However, there is a problem that a defective portion strength occurs, and a soldering portion excessive soldering failure due to excessive supply of solder, a soldering portion appearance defect, and a soldering portion dimension defect occur frequently.

Moreover, in the conventional soldering method and soldering apparatus, even if an image camera is used to detect the amount of the thread solder 2 sent out from the tip of the tubular guide 4, the image processing takes a long time, and There is a drawback that the image processing system construction cost becomes expensive.

The present invention has been made in view of such a point, and its object is to eliminate the above-mentioned drawbacks of the prior art and to accurately detect and control the amount of wire solder delivered. It is therefore an object of the present invention to provide a soldering method and a soldering apparatus that can significantly improve the productivity and quality of automatic soldering work for electronic components.

[0014]

The gist of the present invention lies in the following two points. (1) A long thread solder is sequentially passed through a delivery roller, a tube-shaped guide, and a thread solder supply nozzle, and then sent out onto a soldering portion of a soldering member, and then a robot is downwardly moved onto the soldering member. In a soldering method capable of automatically performing a soldering operation on the soldering member by lowering a robot hand on which a soldering iron is installed for a predetermined period of time, the thread solder sent from the delivery roller is sawtoothed. Saw-tooth-shaped unevenness is formed on the upper surface side by passing the saw-toothed solder, and immediately after the saw-toothed thread solder passes the thread solder supply nozzle through the tubular guide, the upper surface of the saw-toothed thread solder The light is emitted to the side and the presence or absence of the reflected light is detected by the reflection type optical sensor, and then the detection signal is transmitted to the control computer to perform the control. Soldering method which is characterized in that so as to perform the rotation control of the delivery roller and the operation of the delivery of the solder yarn with the sawtooth by computer. (2) A thread solder delivery bobbin wound with thread solder,
A delivery roller capable of delivering the thread solder from the thread solder delivery bobbin, a tube-shaped guide capable of guiding the thread solder delivered from the delivery roller, and a thread fixed to a tip end portion of the tube-shaped guide. In a soldering device comprising a solder supply nozzle and a robot hand capable of lowering a robot soldering iron onto the thread solder sent from the thread solder supply nozzle for a predetermined time, the delivery roller and the tubular guide are provided. A saw toothed roller capable of engraving sawtooth-shaped irregularities on the upper surface side of the thread solder is provided between the sawtoothed rollers, and the sawtoothed thread solder in which the sawtooth irregularities are engraved on the upper surface side is the thread. A reflection type optical sensor is installed above the position where the solder supply nozzle passes, and the concave and convex signal of the sawtoothed thread solder detected by the reflection type optical sensor is provided. Device soldering, characterized in that formed by installing a control computer capable of performing the control and calculation of the delivery amount of the yarn with the saw teeth solder receives.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the soldering method and the soldering apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a front explanatory view showing an embodiment of a soldering method and a soldering apparatus of the present invention.

In FIG. 1, 1 is a thread solder delivery bobbin, 2
Is thread solder, 3 is a delivery roller, 4 is a tube-shaped bending guide, 6 is a thread solder supply nozzle, 7 is a robot hand,
Reference numeral 8 is a robot soldering iron, 10 is a sawtooth roller, 11 is a sawtooth thread solder, and 12 is a reflection type optical sensor.

Next, the operation of one embodiment of the soldering method and the soldering apparatus of the present invention will be described.

First, the delivery roller 3 is operated by driving a drive source (not shown), and thereby the thread solder 2 is delivered from the thread solder delivery bobbin 1.

Next, the thread solder 2 delivered from the delivery bobbin 1 is delivered to the saw tooth roller 10.

FIG. 2 shows a part of the embodiment of the soldering method and the soldering device of the present invention in which the thread solder is fed to the saw-toothed roller and the saw-toothed roller is used to cut the saw-tooth on the upper surface side of the thread solder. It is an enlarged front explanatory view.

In FIG. 2, 2 is a solder wire, 3 is a delivery roller, 10 is a saw tooth roller, and 11 is a saw tooth thread solder.

That is, as shown in FIG. 2, serrated irregularities are alternately and equally spaced on the upper surface side of the thread solder 2 fed to the serrated roller 10.

Next, the saw-toothed thread solder 11 in which the saw-tooth-shaped irregularities are alternately and equally spaced on the upper surface side as described above is fed into the tube-shaped bending guide 4. Here, since the saw-toothed solder 11 fed into the tubular bending guide 4 has sawtooth-shaped irregularities alternately and equally spaced on its upper surface side, it is smooth in the bending direction of the tubular bending guide 4. Can be followed, so that slack does not occur.

Next, the saw-toothed thread solder 11 passing through the tube-shaped bending guide 4 passes through a thread-solder supply nozzle 6 connected to the tip of the tube-shaped bending guide 4 to solder an electronic component (not shown). Sent to the department.

Next, a method for detecting and controlling the feed amount of the sawtoothed solder will be described.

FIG. 3 is an enlarged front view showing how to detect the feed amount of the saw-toothed solder in the embodiment of the soldering method and the soldering apparatus of the present invention. FIG. 3B is a front enlarged explanatory view showing a state in which light can be emitted from the reflective optical sensor to the convex surface of the thread solder, that is, a flat surface, and the reflected light can be detected. FIG. 6 is an enlarged front view showing a state in which light is emitted from the head and reflected light cannot be detected.

In FIG. 3, 11 is a sawtooth thread solder, and 12
Is a reflection type optical sensor.

As can be seen from FIG. 3A, when light is irradiated from the reflection type optical sensor to the convex surface of the saw-toothed thread solder, that is, the flat surface, the irradiation light is reflected straight from the convex surface, that is, the flat surface. As a result, the reflection type optical sensor can detect the reflected light. (ON of reflected light detection
(Signal) On the other hand, as can be seen from FIG. 3B, when light is irradiated from the reflection type optical sensor to the concave surface of the sawtooth solder 11, the irradiation light is reflected in an oblique direction, and as a result, the reflection type optical sensor. Cannot detect the reflected light traveling in the oblique direction. (Reflected Light Detection OFF Signal) Next, a signal indicating the number of repetitions of the reflected light detection ON signal and the reflected light detection OFF signal thus detected is transmitted to a control computer (not shown in FIGS. 1 and 3).

Next, the control computer (not shown) that has received the signal for the number of repetitions of the ON signal for reflected light detection and the OFF signal for reflected light detection in this manner is the saw toothed solder 1
The feed amount of 1 is calculated, and when the designated feed amount is reached, a stop command for stopping the feed roller 3 for a predetermined time is issued, and further, a descending command is issued to the robot hand 7 shown in FIG.

Next, the robot hand 7 which has received the descending instruction descends, and the robot soldering iron 8 fixed to the lower side of the robot hand 7 is also sent out to the soldering portion of the electronic component (not shown). The saw-toothed thread solder 11 is contacted, and as a result, the saw-toothed thread solder 11 is heated and melted, and the soldering operation is automatically performed.

As described above, according to one embodiment of the soldering method and the soldering apparatus of the present invention, it is possible to accurately control the feed amount of the saw-toothed thread solder, thereby improving the productivity and quality of soldering work of electronic parts. Can be significantly improved.

[0033]

According to the soldering method and the soldering apparatus of the present invention, it is possible to accurately control the feed amount of the saw-toothed thread solder, which remarkably improves the productivity and quality of the soldering work of the electronic component. It can be improved and is industrially useful.

[Brief description of drawings]

FIG. 1 is a front explanatory view showing an embodiment of a soldering method and a soldering apparatus of the present invention.

FIG. 2 is a partially enlarged front view showing a state in which a thread solder is fed to a saw tooth roller and saw teeth are cut on the upper surface side of the thread solder by the saw tooth roller in one embodiment of the soldering method and the soldering apparatus of the present invention. FIG.

FIG. 3 is a front enlarged explanatory view showing how to detect the feed amount of the sawtooth thread solder in the embodiment of the soldering method and the soldering apparatus of the present invention, in which (a) is sawtooth thread solder. Is an enlarged front view showing how the reflected light sensor can detect the reflected light by irradiating the convex surface, that is, the flat surface, with the light from the reflective light sensor to the concave surface of the sawtooth thread solder. FIG. 4 is an enlarged front view showing how the reflected light cannot be detected by illuminating.

FIG. 4 is a front explanatory view showing a conventional soldering method and a conventional soldering apparatus.

[Explanation of symbols]

1 Thread solder delivery bobbin 2 Thread solder 3 Sending roller 4 Tube-shaped bending guide 5 slack 6 Thread solder supply nozzle 7 Robot hand 8 Robot soldering iron 10 Saw toothed roller 11 Sawtooth thread solder 12 Reflective optical sensor

Claims (2)

[Claims] 1. A long thread solder is passed through a delivery roller, a tube-shaped guide and a thread solder supply nozzle in this order, and then sent out onto a soldering portion of a soldering member, and then, onto the soldering member on a lower side. In the soldering method capable of automatically performing the soldering work on the soldering member by lowering the robot hand having the robot soldering iron installed therein for a predetermined time, the yarn sent from the delivery roller Immediately after the sawtooth-shaped unevenness is formed on the upper surface side by passing the solder through the sawtooth roller, the sawtoothed thread solder is passed immediately after the sawtoothed thread solder passes through the threaded solder supply nozzle through the tubular guide. The upper surface side of the is irradiated with light and the presence or absence of the reflected light is detected by a reflection type optical sensor, and then the detection signal is transmitted to a control computer to Soldering method which is characterized in that so as to perform the rotation control of the delivery roller and the operation of the delivery of the solder yarn with the sawtooth by your computer. 2. A thread solder delivery bobbin wound with the thread solder, a delivery roller capable of delivering the thread solder from the thread solder delivery bobbin, and a guide for the thread solder delivered from the delivery roller. And a robot hand capable of descending the robot soldering iron for a predetermined time onto the thread solder sent from the thread solder supply nozzle. In the soldering device, a saw tooth roller capable of engraving saw tooth-shaped irregularities on the upper surface side of the thread solder is provided between the delivery roller and the tubular guide, and the saw tooth roller is used. Install a reflection type optical sensor on the position where the saw-toothed wire solder with sawtooth-shaped irregularities on the top surface passes through the wire solder supply nozzle. Also, a control computer is provided which is capable of receiving a concave-convex signal of the saw-toothed thread solder detected by the reflection type optical sensor and performing calculation and control of a delivery amount of the saw-toothed thread solder. Soldering equipment.