JPH11285819A - Soldering head for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a soldering head for a moving continuous soldering for point soldering as well without conducting a complex operation of moving vertically a working arm of automatic machine. SOLUTION: Between a head main body 12, in which an iron member 16 for soldering is hung with two oscillation links 23 so as to be freely movable vertically, and a mounting block 13, which mounts a working arm 10 of automatic soldering machine to the head main body 12, an elevating/lowering drive mechanism 14 consisting of an air cylinder 35 forcedly vertically moving the head main body 12 is arranged, by moving the head main body 14 vertically with the air cylinder 35, point soldering can be conducted without moving the working arm 10 vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soldering head for an automatic machine used by attaching to an automatic machine such as a soldering robot. More specifically, the present invention is capable of performing different types of soldering. The present invention relates to a multifunctional soldering head.

[0002]

2. Description of the Related Art Generally, an automatic machine such as a soldering robot for soldering electronic parts or the like is provided with a trowel member for soldering and a solder nozzle for supplying a thread-like solder at a tip of a working arm. The soldering head is attached, and the iron tip of the iron member is pressed against an object to be soldered such as a printed wiring board to melt the thread-like solder supplied from the solder nozzle and solder the solder.

As a soldering method using such an automatic machine, a point soldering method for individually soldering a plurality of soldering objects and a plurality of soldering objects 4 arranged side by side as shown in FIG. There is a moving continuous soldering method in which the iron tip 1 is moved linearly or curvedly while the iron tip 1 is pressed against the printed wiring board 2 and soldered continuously.

In these soldering methods, different types of soldering heads formed so as to be suitable for each operation are used, and these are used properly. For example, when performing point soldering after performing moving continuous soldering, the soldering head is changed from one for moving continuous soldering to one for point soldering.

[0005] For this reason, there is a problem that the soldering head needs to be replaced for each operation, which complicates the operation process and lowers production efficiency. In particular, in the case where there is a target part for both continuous moving soldering and point soldering in one printed wiring board, the work efficiency is significantly reduced by replacing the head. Furthermore, since the operating conditions for point soldering must be set in the controller of the automatic machine in addition to the operating conditions for continuous soldering, the setting work is complicated and the control becomes complicated. There was also.

[0006]

The main technical problem of the present invention is that a simple mechanism for vertically moving the iron tip is attached to a soldering head for continuous moving soldering.
An object of the present invention is to enable the soldering head to be used also for point soldering without performing complicated control such as moving a work arm of an automatic machine up and down.

[0007]

In order to solve the above-mentioned problems, a soldering head according to the present invention comprises a iron member having an inclined working angle and a solder nozzle for supplying thread-like solder to the iron tip of the iron member. And a mounting block for mounting the head main body to a working arm of an automatic soldering machine, wherein the head main body is parallel and inclined to suspend the iron member vertically.
A swing mechanism having two swing links, and first spring means for setting the contact pressure of the iron tip during soldering by urging the iron member upward with a force smaller than its weight, A lift drive mechanism for forcibly moving the head main body up and down is provided between the head main body and the mounting block.

The soldering head having the above configuration is attached to a work arm of an automatic soldering machine, and when soldering a plurality of soldering objects continuously, the iron tip is moved along the soldering objects. When performing point soldering in which multiple soldering objects are individually soldered while performing soldering, the iron tip is moved to each object by forcibly moving the head main body up and down with the lifting drive mechanism. Perform soldering by contacting them individually. in this case,
The work arm of the automatic soldering machine does not need to be moved up and down, and the point soldering can be performed only by moving at a required speed.

Thus, the soldering head for continuous soldering can be used also for point soldering, in which case there is no need to perform complicated control such as moving the work arm of the automatic soldering machine up and down.

According to one specific embodiment of the present invention, the iron member positions the iron tip on the mounting center line in a vertical plane including the mounting center of the work arm and the mounting block. In addition to being disposed in an inclined state in the state,
4 rocking links in a vertical plane parallel to the above
It is arranged so as to be able to swing in the vertical plane in a state of being inclined by 5 degrees or more.

According to this, when the soldering head is used for automatic continuous soldering, even if the iron tip moves up and down due to a height difference of the iron tip moving path, the two tilting rocking links swing. Since the iron tip moves up and down almost vertically at that position, not only the swing in the front-rear direction is reduced, but also the change in angle and the contact pressure due to the vertical movement hardly occur, so that poor soldering or soldering Bridges and the like are less likely to occur, and the soldering operation can be performed reliably and accurately.

According to another specific embodiment of the present invention,
The swing mechanism includes a first bracket connected to the mounting block, and a second bracket suspended from the first bracket so as to be vertically movable by the two swing links. The iron member is attached to the two brackets while maintaining a required inclination angle, and the first spring means is stretched between the first bracket and the second bracket.

The second bracket is accommodated in a notch provided in the first bracket so as to abut on the first bracket at the upper limit position and the lower limit position of the iron member so as to restrict further swinging. ing.

In the present invention, the working angle of the iron member is adjustable by an angle adjusting mechanism. The angle adjusting mechanism, a mounting member extending from the iron member toward the second bracket, an arc-shaped mounting hole formed in the mounting member with the iron tip as a center of curvature, and the mounting member at an appropriate position of the mounting hole. A fixing screw fixable to the second bracket.

According to another specific embodiment of the present invention,
The lifting drive mechanism includes an air cylinder, a slider driven up and down by the air cylinder, and a guide for guiding the slider up and down. The air cylinder and the guide are attached to a mounting block, and the slider is a head. It is attached to the first bracket of the main body.

In the present invention, a linear guide mechanism for supporting the head main body on the soldering head so as to be movable in a direction perpendicular to the moving direction of the iron tip during continuous soldering, and returning the head main body to the soldering head. Second biasing in direction
Spring means can be provided. The linear guide mechanism includes a first base member provided with a V-shaped guide groove on each of inner surfaces of two parallel outer rails, and an outer surface of two parallel inner rails located inside the outer rail. It comprises a second base member provided with a V-shaped guide groove, and a rolling element rotatably interposed between the guide grooves of the two outer rails and the inner rail facing each other.

By providing such a linear guide mechanism, even if the position of an object to be soldered is slightly shifted left and right, the iron tip moves right and left according to the positional shift due to the displacement of the head main body by the linear guide mechanism. It is displaced, and is pressed laterally against the object with a substantially constant contact pressure by the urging force of the second spring. As a result, the conventional problems such as the iron tip being strongly hit and damaged or damaged by the object, and the solder bridge and the poor soldering can be solved.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show a first embodiment of a soldering head according to the present invention. In the drawings, reference numeral 10 denotes a working arm of an automatic soldering machine, in which a part of a tip is shown. The soldering head 11A is attached to the arm 10.

The soldering head 11A has a head body 12 having a trowel member 16 for performing soldering and a solder nozzle 17 for supplying a thread-like solder 18;
A mounting block 13 for mounting the head main body 12 to the working arm 10; and a head main body 12 provided between the mounting block 13 and the head main body 12.
And a raising / lowering drive mechanism 14 for forcibly moving up and down.

The head main body 12 has a swing mechanism 20 for suspending the iron member 16 so as to be vertically movable. The swing mechanism 20 includes a first bracket 21 connected to the lifting drive mechanism 14 and a second bracket 22 for supporting the iron member 16 in an inclined state.
It is suspended vertically by 3 and 23. These swing links 23 are arranged so as to be swingable in a state of being inclined by 45 degrees or more in a vertical plane parallel to the vertical plane including the axis of the iron member 16. On the other hand, the iron member 16 is arranged such that the tip of the iron tip 16a is located on the mounting center L1 between the work arm 10 and the soldering head 11A, and thereby the swing links 23, 23
When the second bracket 22 moves up and down due to the swing, the iron tip 16a moves up and down almost vertically along the mounting center L1 and hardly swings in the front-back direction.

Strictly speaking, the vertical movement of the iron tip 16a is caused by the vertical movement of the iron tip 16a, but the vertical movement width of the iron tip 16a in actual soldering is as small as 1-2 mm or less.
The swing before and after that is negligibly small.

The second bracket 22 is accommodated in a notch 25 at the lower end of the first bracket 21, and the upper surface of the second bracket 22 contacts the upper surface of the notch 25 at the upper limit position of the iron member 16. At the lower limit position of the iron member 16, the second
The side surface of the bracket 22 is in contact with the side surface of the notch 25, and the second bracket 22 and the notch 25
Thus, a defining means for defining the range of vertical movement of the iron member 16 is formed.

A first spring 26 is stretched between the first bracket 21 and the second bracket 22, and the second bracket 22 is attached to the second bracket 22 by the first spring 26. Further, the contact pressure of the iron tip 16a with respect to the soldering target is set by urging upward with a force smaller than the total weight of the members attached thereto. This contact pressure can be adjusted by moving the adjusting screw 27 forward and backward to increase or decrease the tension of the first spring 26.

The iron member 16 is connected to the second bracket 2
2 is attached so that the working angle can be adjusted by the angle adjusting mechanism 30. This angle adjusting mechanism 30
Is an arc-shaped mounting member 31 extending from the trowel member 16 toward the second bracket 22;
And a fixing screw 33 that can fix the mounting member 31 to the second bracket 22 at an appropriate position in the mounting hole 32. By adjusting the working angle θ of the iron member 16 along the mounting hole 32, the iron tip 1 can be adjusted regardless of the working angle.
6a can always be located on the mounting center L1.

The solder nozzle 17 is attached to a nozzle attachment member 34 attached to the iron member 16 via an attachment shaft 17a, and is inclined at an angle such that the thread-like solder 18 can be sequentially supplied to the iron tip 16a. .

The lifting drive mechanism 14 includes an air cylinder 36 mounted on the mounting block 13 by a plate 35, a slider 37 connected to a rod of the air cylinder 36 and driven up and down, and an air cylinder 36.
And a guide 38 formed integrally on the side surface of the head 37 to guide the vertical movement of the slider 37. The slider 37 is mounted to the first bracket 21 of the head main body 12 via a mounting block 39. In the figure, 36a and 36a are ports for connecting a tube for supplying compressed air to the air cylinder 36.

The soldering head 11A having the above configuration
Is attached to the work arm 10 of the automatic soldering machine and is used for both automatic continuous soldering and point soldering. Automatic continuous soldering is performed by moving the iron tip 16a along a plurality of soldering objects. Point soldering supplies compressed air to the air cylinder 36 to forcibly move the head main body 12 up and down. Thereby, the iron tip 16a is individually brought into contact with each object. In this point soldering, the work arm 10 of the automatic soldering machine does not need to be moved up and down, and the point soldering can be performed only by moving the work arm continuously or intermittently at a required speed.

Thus, since the point soldering can be performed as it is using the soldering head for the continuous moving soldering, for example, both the moving continuous soldering and the point soldering can be performed in one printed wiring board. Even when there is a portion, the soldering operation can be efficiently performed in one operation process without interrupting the operation due to the replacement of the head.

When the soldering head 11A performs continuous soldering, if there is a height difference in the movement path of the iron tip 16a, the two swing links 23, 23 in the swing mechanism 20 swing. The movement causes the iron member 16 to move up and down, thereby absorbing the height difference. In this case, since the two rocking links 23 are inclined and the range of rocking due to the height difference is small, the iron member 16 moves up and down almost vertically in that position, and the iron tip 16a moves along the movement path. Is very small. Further, the first spring means 26 expands and contracts with the vertical movement of the iron tip 16a, but the range of the expansion and contraction is small and the change in the urging force is small enough to be ignored.
The contact pressure of the iron tip 16a against the object is also kept substantially constant.

As a result, there is almost no change in front-back swing, angle change, or contact pressure due to the vertical movement of the iron tip 16a, so that soldering defects and solder bridges are less likely to occur, and the soldering work can be performed reliably and accurately. Can do well.

FIG. 3 shows a main part of a second embodiment of the soldering head according to the present invention. The soldering head 11B of the second embodiment has a trowel for moving the head main body 12 during continuous soldering. The point of having the linear guide mechanism 40 that supports the movable member in a direction orthogonal to the previous moving direction is the first member.
This is different from the soldering head 11A of the embodiment.

That is, in the soldering head 11B, the mounting block 13 for mounting to the working arm 10 is a first mounting block 13a that is fixed to the working arm 10.
And a second mounting block 13b for mounting the air cylinder 36. The two mounting blocks 13a,
The linear guide mechanism 40 is provided between 13b.

The linear guide mechanism 40 supports the head main body 12 movably in a direction orthogonal to the direction of movement of the iron tip 16a (direction along the vertical plane including the axis of the iron member 16) during continuous soldering. As shown in FIG. 5, a first V-shaped guide groove 43a is provided on the inner surface of each of two parallel outer rails 43, 43.
The base member 41 and the second base member 42 having V-shaped guide grooves 44a provided on the outer surfaces of two parallel inner rails 44, 44 located inside the outer rails 43, 43, respectively. Roller-shaped rolling elements 45 interposed between the guide grooves 43a, 44a of the outer rail 43 and the inner rail 44 so as to freely roll, respectively.

Projections 41a and 42a are provided on the side surfaces of the base members 41 and 42, respectively.
A second spring 46 for biasing the two members 41, 42 in the return direction is adjusted between 1a and 42a. Then, the first base member 41 is attached to the first attachment block 13a, and the second base member 42 is attached to the second attachment block 13a.
b.

When performing continuous soldering using the soldering head 11B having the linear guide mechanism 40, the object to be soldered such as a lead wire is positioned in both the left and right directions with respect to the movement path of the iron tip 16a. Assuming that the second base member 42 is displaced by slightly extending the second spring 46, assuming that the second base member 42 is displaced, coordinate input to the controller of the automatic soldering machine is performed so that soldering is performed. I do.

Thus, by providing the linear guide mechanism 40, even if the position of the soldering target is slightly shifted left and right, the second base member 42 expands and contracts the second spring 46 with respect to the moving direction of the iron tip 16a. The iron tip 16a shifts right and left in accordance with the displacement of the soldering target object, and the iron tip 16a moves at a substantially constant contact pressure by the urging force of the second spring 46. You will be pressed against things. For this reason, there is a disadvantage that the iron tip 16a does not strongly hit the target object and damages or damages it as in the related art, and a gap is formed between adjacent iron objects to cause poor soldering. Does not occur.

[0037]

As described above, according to the soldering head of the present invention, a simple mechanism for vertically moving the iron tip is added to the soldering head for continuous moving soldering.
The soldering head can also be used for point soldering without performing complicated control such as moving the work arm of the automatic machine up and down. In addition, since the trowel member is suspended vertically by two inclined swing links,
Even when the moving path of the iron tip is not flat when performing continuous soldering, the swing width in the front-rear direction when the iron tip moves up and down can be made extremely small, so that soldering failure, solder bridge, etc. It is possible to perform accurate soldering without causing the problem. Furthermore, by providing a linear guide mechanism, even if the soldering target is displaced to the left or right when performing continuous soldering, the iron tip is shifted to the left or right in accordance with those displacements, and the displacement is performed. Can be absorbed, so that the iron tip does not strongly hit the object and damage or damage it, and there is no gap between adjacent objects and no soldering failure occurs.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a soldering head according to the present invention.

FIG. 2 is a right side view of the soldering head of FIG.

FIG. 3 is a main part front view showing a second embodiment of the soldering head according to the present invention.

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is an enlarged view of a main part of FIG. 3;

FIG. 6 is a main part side view for explaining the continuous movement soldering.

[Description of Signs] 10 Working arms 11A, 11B
Soldering head 12 Head main body 13 Mounting block 14 Lifting drive mechanism 16 Iron member 16a Iron tip 17 Solder nozzle 18 Threaded solder 20 Swing mechanism 21 First bracket 22 Second bracket 23 Swing link 25 Notch 26 First spring 30 Angle adjustment Mechanism 31 mounting member 32 mounting hole 33 fixing screw 36 air cylinder 37 slider 38 guide 40 linear guide mechanism 41 first base member 42 second base member 43 outer rail 44 inner rail 43a, 44a
Guide groove 45 Roller 46 Second spring

Claims (9)

[Claims] 1. A head body having a trowel member having an inclined working angle and a solder nozzle for supplying a thread-like solder to the iron tip of the trowel member, and the head body is attached to a work arm of an automatic soldering machine. A swinging mechanism including two mutually parallel and inclined swinging links for suspending the iron member up and down so that the iron body is vertically movable. First spring means for setting the contact pressure of the iron tip at the time of soldering by urging upward with a small force; and forcibly moving the head main body up and down between the head main body and the mounting block. Having an elevating drive mechanism for moving
A soldering head for an automatic machine. 2. The soldering head according to claim 1, wherein the iron member is positioned such that the iron tip is positioned on the mounting center line in a vertical plane including the mounting center between the work arm and the mounting block. In the inclined state, and the above 2
4 rocking links in a vertical plane parallel to the above
The device is characterized in that it is arranged so as to be able to swing within the vertical plane in a state of being inclined at least 5 degrees. 3. The soldering head according to claim 1, wherein the swing mechanism moves up and down by a first bracket connected to the mounting block and the first bracket by the two swing links. A second bracket suspended so as to be freely movable, and the trowel member is attached to the second bracket while maintaining a required inclination angle, and the first spring is provided between the first bracket and the second bracket. Characterized in that the means are stretched. 4. A soldering head according to claim 3, wherein said second bracket abuts on said first bracket at an upper limit position and a lower limit position of said iron member in a notch provided in said first bracket. Characterized by being housed in such a way that the swing of the body is regulated. 5. The soldering head according to claim 3, wherein a working angle of the iron member is adjustable. 6. The soldering head according to claim 5, wherein an angle adjusting mechanism for adjusting a working angle of the iron member extends from the iron member toward the second bracket, and the mounting member. And an arc-shaped mounting hole formed with the iron tip as a center of curvature, and a fixing screw capable of fixing the mounting member to the second bracket at an appropriate position of the mounting hole. 7. The soldering head according to claim 3, wherein the lifting drive mechanism guides an air cylinder, a slider driven up and down by the air cylinder, and a vertical movement of the slider. A guide, wherein the air cylinder and the guide are mounted on a mounting block side, and the slider is mounted on a first bracket mainly composed of a head. 8. A soldering head according to claim 1, wherein said soldering head is capable of displacing a main body of said head in a direction orthogonal to a moving direction of an iron tip during continuous continuous soldering. A linear guide mechanism for supporting the main body; and a second spring means for urging the main body of the head in a return direction. 9. The soldering head according to claim 8, wherein the linear guide mechanism has a first base member provided with a V-shaped guide groove on each of inner surfaces of two parallel outer rails, and the outer rail. A second base member provided with a V-shaped guide groove on each of outer surfaces of two parallel inner rails located inside the inner rail, and freely rotatable between guide grooves of two opposing outer rails and the inner rail. And a rolling element interposed between the two.