JP2008142769A - Automatic thread solder supply method and automatic thread solder supply apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thread solder supply method and an apparatus therefor which satisfy the need for highly accurate automatic soldering of fine thread solder for performing soldering in a trace amount in a minute region. <P>SOLUTION: An automatic unwinding apparatus 3 giving suitable tension which takes up the sag of thread solder for preventing the cutting of thread solder during thread solder feeding and for increasing feeding accuracy is connected to a feeding mechanism 10 with a flexible tube 9, and a moving mechanism 13 making the feeding mechanism 10 close to a soldering place is fitted to the feeding mechanism 10, whereby the reverse movement of the thread solder is prevented. Further, when a solder scattering prevention function is imparted to the feeding mechanism 10, a pinch roller is composed of an elastic ring 17 capable of regulating the notching depth and giving various fine thread solder diameters, which are the above function. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a yarn solder supply apparatus.

When automatic soldering is performed by combining the thread solder supply device with a robot or the like, the thread solder reel is integrated with the thread solder supply device, and the function of feeding the amount of thread solder to the pinch roller for feeding the thread solder In addition, it has the function of winding the thread solder from the reel. Therefore, the thread solder is applied with a contact force for quantitative feeding and an unwinding force for unwinding from the reel, and the thread fed from the pinch roller. In many cases, the solder is passed through a flexible tube from the pinch roller outlet side to a guide for guiding the solder to a soldering place.
Further, when the soldering is completed, the pinch roller may be reversely rotated to reverse the thread solder in order to separate the thread solder tip from the soldering location.
As a reference, Japanese Patent Application No. 11-332310. Design registration No. 1277887.
Japanese Patent Application No. 2006-3143351.

Problems to be solved by the invention

The distance from the pinch roller of the thread solder feeding device to the soldering location is far apart when a small amount of thread solder is fed to a micro area with high accuracy using a laser soldering machine using thin thread solder. This causes variations in the feed amount and responsiveness due to the deflection of the thread solder itself in the thread solder guide section, resulting in a lack of stability in the soldering of a small amount of thread solder, increasing the frequency of failures, and automatic soldering. When the solder is returned to the direction opposite to the feed direction in order to quickly cut the thread solder melt tip from the soldering place at the end of the solder supply, etc. In this case, the pinch roller may be deformed by the feed force, and slipping at the pinch roller part or hip breakage during feeding is likely to occur. Cause at the same time of the wire solder cutting and lacks of.
Furthermore, when unwinding the reel from the reel by the pulling force of the pinch roller, the unwinding resistance of the reel may cause the thread solder to be thin, which may cause cutting.
In particular, in a feeding mechanism having a solder scattering prevention function, bending, slipping, and hip breakage become prominent due to the grooving process in the thread solder. When the feeding mechanism with solder scattering prevention function is used for automatic soldering, the circular cutter blade for thread solder grooving process bears one side of the pinch roller, and the thread groove guide groove roller takes charge of the other, In order to obtain the driving force of both rollers, the roller on one side is driven by the power of a motor or the like, and the power side roller and the other roller transmit power through a gear or the like. Backlash occurs in gears, etc., and feed amount variation and minute feeds are difficult.Pinch roller center distance, blade diameter, groove wheel diameter, and gear pitch diameter depend on the thread solder diameter and solder type. Since it is fixed, when selecting an appropriate grooving depth, it is impossible to cope with various solder diameters and to adjust the cutting depth.

Means for solving the problem

  The present invention provides a pinch roller used as a thread solder feeding device with a contact force and a deflection between the thread solder reel and the pinch roller for thread solder feeding when a thin thread solder that is easily cut is used for the purpose of a small amount of soldering. As means for preventing the external force other than the appropriate tension to be reduced from being applied to the yarn solder, a flexible tube for passing the thread solder through the pinch roller entrance side is connected to the dancer roller exit side of the automatic winding device.

  Furthermore, a thread solder is supplied with a pinch roller through a pinch roller through an outlet nozzle provided at the pinch roller outlet. By reducing the size of the pinch roller and the outlet nozzle, the feeding mechanism can be brought close to the soldering place. Sometimes the feed mechanism itself such as a pinch roller is moved by a moving mechanism. Yield solder supply can be performed by using the moving mechanism while the required supply amount is released from the outlet nozzle, or by the combined soldering operation such as feeding operation after moving the moving mechanism, feeding operation during operation of the moving mechanism, etc. In order to reverse the thread solder, the pinch roller is not reversed and the melting tip of the thread solder is separated from the soldering position by the moving mechanism.

  In the feeding mechanism having a solder scattering prevention function, an elastic ring is attached to one side of the pinch roller, and a transmission force is obtained by a frictional force utilizing the deflection of the ring, and the eccentric mechanism is provided to the other pinch roller. Etc. and adjusting the distance between the pinch roller cores, it is possible to adjust the depth of cut with the ring and cope with various yarn thread diameters.

FIG. 1 is a block diagram of an embodiment of the present invention. Reference numeral 1 denotes an optical axis from the laser oscillator, heat is supplied to the soldering object 2, 3 denotes an unwinding device for winding 8 yarn solder from 7 solder reels, 5, 6 With the upper and lower limit control by the dancer roller detector, the reel rotates in the winding direction, and the 4 dancer rollers swing and are driven by 12 motors that are thread solder feeding mechanisms while applying slack preventing tension to the 8 thread solder. Thread solder is supplied to 10 transmission pinch rollers through 9 guide tubes, and required thread solder is fed out through 11 outlet nozzles at the pinch roller outlet. Reference numeral 13 denotes a moving mechanism for moving the feeding mechanism, which rotates and feeds 15 feed screws by 14 motors.
FIG. 2 shows that the feeding mechanism 10 has moved to the soldering place, and X2 represents that the distance X1 in FIG. 1 has changed due to the movement, and X2−X1 = movement amount.
FIG. 3 shows that 10 transmission pinch rollers having a solder scattering prevention function in the solder feeding mechanism are thread solder grooving cutter blades, and that 16 transmitted pinch rollers are thread groove guide groove wheels. Show.
FIG. 4 shows that the groove part of the thread solder of 8 has 10 pinch rollers grooving thread solder as a grooving cutter blade, and the other 16 pinch rollers are guide groove wheels for thread solder grooving. Indicates that it also serves as
18 eccentric shafts indicate that the center distance between 10 cutter blades and 16 groove wheels can be changed using 19 levers, and 17 elastic rings provide the rotational driving force of 10 pinch rollers to 16 This indicates that the driving force is transmitted to the other pinch roller and the elastic ring makes it possible to cope with the change in the inter-center distance by the deformation.
FIG. 5 shows that 20 flux portions in the yarn solder section of 8 are opened by 10 pinch rollers and yarn solder grooving cutter blades.

The invention's effect

  In this way, a thread solder supply device that can be used as a thread solder supply device for automatic soldering can be realized with high precision and with a small diameter used for micro soldering. Is also effective.

  It is a front view of the laser oscillator, the reel winding device, the feeding mechanism, and the moving mechanism in the configuration of the automatic soldering apparatus.   It is the front view which the infeed mechanism in the structure of FIG. 1 moved.   It is a top view of the pinch roller which is a feeding mechanism and its entrance side and exit side.   It is a side view of a cutter blade and an elastic body ring, and a sectional view of a grooved wheel   It is sectional drawing of a thread solder and a cutter blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laser oscillator 2 Solder object 3 Unwinding device 4 Dancer roller 5 Upper limit detector 6 Lower limit detector 7 Yarn solder reel 8 Yarn solder 9 Guide tube 10 Transmission pinch roller 11 Exit nozzle 12 Sending motor 13 Moving mechanism 14 Moving drive motor 15 Feed screw 16 Received pinch roller 17 Elastic ring 18 Eccentric shaft 19 Lever 20 Flux

Claims (3)

  When automatically soldering the thread solder wound on the thread solder reel, etc., the thread solder wound from the thread solder reel is guided to the feed mechanism such as a pinch roller through the inside of the flexible tube and the like. A method that satisfies the soldering conditions such as the required amount feeding speed, the number of times of feeding, and the accuracy of them to move the mechanism to the soldering place and perform the optimum soldering of the thread solder sent out by a pinch roller or the like.   A yarn capable of moving the yarn solder feeding mechanism to a soldering location, which is a combination of an automatic unwinding device for realizing Claim 1 and a flexible guide for guiding the unwound yarn solder to the yarn solder feeding mechanism. Automatic solder supply device   3. The automatic yarn feeder according to claim 2, wherein an elastic ring is used for driving transmission of the pinch roller when a feeding mechanism having a solder scattering prevention function is employed.

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