JP3363090B2 - Soldering head for automatic machine - Google Patents

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, which is used by being attached to an automatic machine such as a soldering robot, and more specifically, different types of soldering can be performed. The present invention relates to a multifunctional soldering head.

[0002]

2. Description of the Related Art An automatic machine such as a soldering robot for soldering electronic parts is generally equipped with a trowel member for soldering and a solder nozzle for supplying thread solder at the tip of a working arm. The soldering head is attached, the iron tip of the iron member is pressed against a soldering object such as a printed wiring board, and the thread solder supplied from the solder nozzle is melted for soldering.

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 continuous moving soldering method in which the soldering tip 1 is linearly or curvedly moved and continuously soldered while the soldering tip 1 is pressed against the printed wiring board 2.

[0004] These soldering methods use different types of soldering heads that are formed to suit their work, and they are used properly. For example, when the point soldering is performed after the moving continuous soldering, the soldering head is replaced with that for the continuous moving soldering.

Therefore, there is a problem that the soldering head needs to be replaced for each work, the work process is complicated, and the production efficiency is poor. In particular, when there is a target portion for both moving continuous 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 moving continuous soldering, the setting work is complicated and the control becomes complicated. There was also.

[0006]

SUMMARY OF THE INVENTION The main technical problem of the present invention is to attach a simple mechanism for vertically moving a trowel 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 the working arm of an automatic machine up and down.

[0007]

In order to solve the above problems, a soldering head of the present invention comprises a trowel member having an inclined working angle, and a solder nozzle for supplying thread solder to the trowel tip of the trowel member. A head main body having a head 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 to and slanted to vertically suspend the trowel member.
A rocking mechanism having two rocking links, and a first spring means for setting the contact pressure of the iron tip at the time of soldering by biasing the iron member upward with a force smaller than its weight, It is characterized in that an elevation 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 construction is attached to a working arm of an automatic soldering machine, and when a plurality of objects to be soldered are continuously soldered, the tip of the soldering iron is moved along the objects. When performing point soldering, in which multiple soldering targets are individually soldered, the lifting and lowering drive mechanism forcibly moves the head up and down to move the iron tip to each target. Solder them individually. in this case,
The working 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 it at a required speed.

Thus, the soldering head for moving and continuous soldering can also be used for point soldering, and in that case, it is not necessary to perform complicated control such as moving the working arm of the automatic soldering machine up and down.

According to one specific embodiment of the present invention, the iron member has the iron tip positioned on the attachment center line in a vertical plane including the attachment center of the working arm and the attachment block. In this state, it is arranged in an inclined state, and the above 2
Four swing links are installed in the vertical plane parallel to the above vertical plane.
It is arranged so as to be swingable in the vertical plane in a state of being inclined by 5 degrees or more.

Thus, when the above soldering head is used for automatic continuous soldering, even if the tip of the soldering iron moves up and down due to the height difference of the moving path of the soldering iron, the two swinging slant links swing. Since the iron tip moves up and down almost vertically at that position, not only the runout in the front-rear direction is reduced, but also the change in the angle and the change in the contact pressure due to the up-and-down movement hardly occur. A bridge or the like is unlikely to occur, and soldering work can be performed reliably and accurately.

According to another specific embodiment of the 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 trowel 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 housed in a notch provided in the first bracket so as to abut against the first bracket at the upper limit position and the lower limit position of the trowel member so that further swinging thereof is restricted. ing.

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

According to another specific embodiment of the invention,
The lifting drive mechanism includes an air cylinder, a slider that is vertically driven by the air cylinder, and a guide that guides vertical movement of the slider. The air cylinder and the guide are mounted on 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 that the head main body can be displaced in a direction orthogonal to the moving direction of the iron tip during the moving and continuous soldering, and the head main body is returned. Second biased in the direction
Spring means can be attached. This linear guide mechanism includes a first base member in which V-shaped guide grooves are provided on inner surfaces of two parallel outer rails, and outer surfaces of two parallel inner rails located inside the outer rail. The second base member is provided with a V-shaped guide groove, and the rolling elements are rotatably interposed between the guide grooves of the two pairs of outer rails and inner rails facing each other.

By providing such a linear guide mechanism, even if the position of the object to be soldered is slightly deviated to the left or right, the movement of the head main body by the linear guide mechanism causes the iron tip to move to the left or right according to the positional deviation. After the displacement, the second spring urges the object laterally with a substantially constant contact pressure. As a result, the conventional problems such as the iron tip hitting the object strongly and damaging or damaging it, and the solder bridge and poor soldering are eliminated.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 show a first embodiment of a soldering head according to the present invention, in which 10 is a working arm of an automatic soldering machine, a part of the tip of which is shown. A soldering head 11A is attached to the arm 10.

The soldering head 11A includes a head main body 12 having a trowel member 16 for performing soldering and a solder nozzle 17 for supplying thread-like solder 18.
Mounting blocks 13 for mounting the head main body 12 to the working arm 10, and the head main body 12 provided between the mounting blocks 13 and the head main body 12.
And an elevating drive mechanism 14 for forcibly moving up and down.

The head main body 12 has a swinging mechanism 20 for suspending and supporting the trowel member 16 so as to be vertically movable. In this swing mechanism 20, a second bracket 22 that supports the trowel member 16 in an inclined state is attached to a first bracket 21 that is connected to the lifting drive mechanism 14, and two parallel swing links 2 are provided.
It is vertically suspended by 3,23. These swing links 23 are arranged in a vertical plane parallel to the vertical plane including the axis of the trowel member 16 so as to be swingable in a state of being inclined by 45 degrees or more. On the other hand, the trowel member 16 is arranged such that the tip of the trowel tip 16a is located on the attachment center L1 of the working arm 10 and the soldering head 11A, whereby the swing links 23, 23 are provided.
When the second bracket 22 moves up and down due to the rocking, the iron tip 16a moves up and down substantially vertically along the attachment center L1 and hardly moves in the front-rear 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 to 2 mm.
The shake before and after that is small enough to be ignored.

The second bracket 22 is housed in the notch 25 at the lower end of the first bracket 21, and the upper surface of the second bracket 22 abuts the upper surface of the notch 25 at the upper limit position of the trowel member 16. At the lower limit position of the trowel member 16, the second
The side surface of the bracket 22 contacts the side surface of the notch 25, and the second bracket 22 and the notch 25
By these, the defining means for defining the range of vertical movement of the trowel member 16 is formed.

A first spring 26 is stretched between the first bracket 21 and the second bracket 22, and the first bracket 26 is used to move the second bracket 22 and the second bracket 22 and the trowel member 16 together. Further, the contact pressure of the iron tip 16a with respect to the object to be soldered is set by biasing upward with a force smaller than the total weight of the members accompanying them. This contact pressure can be adjusted by advancing and retracting the adjusting screw 27 to increase or decrease the tension of the first spring 26.

The trowel member 16 is used for the second bracket 2
2 is attached so that the working angle can be adjusted by the angle adjusting mechanism 30. This angle adjustment mechanism 30
Is an arc-shaped attachment member 31 extending from the iron member 16 toward the second bracket 22, and the iron tip 16a is attached to the attachment member 31.
It has an arc-shaped mounting hole 32 formed with the center of curvature as the center of curvature, and a fixing screw 33 capable of fixing 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 trowel member 16 along the mounting hole 32, the trowel 1
6a can always be located on the attachment center L1.

The solder nozzle 17 is mounted on the nozzle mounting member 34 mounted on the trowel member 16 via a mounting shaft 17a, and is inclined at an angle such that the thread solder 18 can be sequentially supplied to the trowel 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 the air cylinder 36.
And a guide 38 that is integrally formed on the side surface of the head 37 to guide the vertical movement of the slider 37, and the slider 37 is attached to the first bracket 21 of the head main body 12 via an attachment block 39. In the figure, 36a and 36a are ports for connecting a tube for supplying compressed air to the air cylinder 36.

Soldering head 11A having the above structure
Is attached to the working arm 10 of an automatic soldering machine and is used for both automatic continuous soldering and point soldering. The automatic continuous soldering is performed by moving the iron tip 16a along a plurality of objects to be soldered, and the point soldering is to supply compressed air to the air cylinder 36 to forcibly move the head main body 12 up and down. By doing so, the trowel 16a is brought into contact with each object individually. In this point soldering, it is not necessary to move the working arm 10 of the automatic soldering machine up and down, and the point soldering can be performed only by moving continuously or intermittently at a required speed.

Thus, since it is possible to perform point soldering as it is using the soldering head for moving continuous soldering, for example, both moving continuous soldering and point soldering can be performed on one printed wiring board. Even if there is a place, the soldering work can be efficiently performed in one working process without interrupting the work by replacing the head.

In the case where the soldering head 11A is used for continuous moving soldering, and if there is a difference in height in the moving path of the iron 16a, the two swinging links 23, 23 of the swinging mechanism 20 swing. The movement causes the trowel member 16 to move up and down, and the height difference is absorbed. In this case, since the two rocking links 23, 23 are inclined and the range of rocking due to the difference in height is small, the trowel member 16 moves up and down substantially vertically at that position, and the trowel 16a moves along the movement path. The range of swinging back and forth is very small. Further, although the first spring means 26 expands and contracts as the iron tip 16a moves up and down, the range of expansion and contraction is small and the change in biasing force is so small that it can be ignored.
The contact pressure of the iron tip 16a with respect to the object is also kept substantially constant.

As a result, since there is almost no runout, angle change or contact pressure change associated with the vertical movement of the iron 16a, soldering failure or solder bridge is unlikely to occur, so that the soldering work can be performed reliably and accurately. You can do it well.

FIG. 3 shows the essential parts of a second embodiment of the soldering head according to the present invention. The soldering head 11B of the second embodiment is a trowel when the head main body 12 is moved and continuously soldered. The point that the linear guide mechanism 40 that supports the movable body in a direction orthogonal to the previous moving direction is provided is the above-mentioned first aspect.
This is different from the soldering head 11A of the embodiment.

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

The linear guide mechanism 40 movably supports the head main body 12 in a direction orthogonal to the moving direction of the iron tip 16a (the direction along the vertical plane including the axis of the iron member 16) when continuously soldering the head. As shown in FIG. 5, a first V-shaped guide groove 43a is provided on the inner surface of each of the two parallel outer rails 43, 43.
The base member 41 and the second base member 42 in which V-shaped guide grooves 44a are provided on the outer surfaces of the two parallel inner rails 44, 44 located inside the outer rails 43, 43, respectively The outer rail 43 and the inner rail 44 of the pair are formed by roller-shaped rolling elements 45 which are rotatably interposed between the guide grooves 43a and 44a.

Protrusions 41a and 42a are provided on the side surfaces of the base members 41 and 42, respectively.
A second spring 46, which urges both members 41, 42 in the returning direction, is adjusted between 1a and 42a. Then, the first base member 41 is attached to the first mounting block 13a, and the second base member 42 is attached to the second mounting block 13a.
It is attached to b.

When using the soldering head 11B equipped with the linear guide mechanism 40 to perform continuous moving soldering, the soldering object 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. Coordinates are input to the controller of the automatic soldering machine so that the second base member 42 can be soldered on the basis of a state in which the second base member 42 is slightly extended and displaced, assuming that the two are displaced. I do.

Thus, by providing the linear guide mechanism 40, the second base member 42 expands and contracts the second spring 46 with respect to the moving direction of the iron tip 16a even if the position of the object to be soldered is slightly deviated from side to side. By displacing in a right angle direction, the iron tip 16a shifts to the left or right in accordance with the positional displacement of the soldering object, and the iron tip 16a is subject to a substantially constant contact pressure by the urging force of the second spring 46. It will be pressed against things. Therefore, unlike the conventional case, the trowel 16a does not hit the object strongly to damage or damage it, and there is a gap between the object and an adjacent object, resulting in 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 attached 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 working arm of the automatic machine up and down. Also, since the trowel member is suspended vertically by two tilting 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 or solder bridge, etc. It is possible to perform accurate soldering without causing Furthermore, by providing a linear guide mechanism, even if the soldering target is displaced to the left or right when performing continuous moving soldering, the iron tip is displaced to the left or right according to the displacement, and the displacement is caused. Since the trowel does not hit the object strongly and does not damage or damage it, there is no gap between the object and the adjacent object, resulting in poor soldering.

[Brief description of drawings]

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

2 is a right side view of the soldering head of FIG. 1. FIG.

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

FIG. 4 is a left side view of FIG.

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

FIG. 6 is a side view of an essential part for explaining the moving continuous soldering.

[Explanation of symbols]

10 Working arm 11A, 11B
Soldering head 12 Head main body 13 Mounting block 14 Lifting drive mechanism 16 Ironing member 16a Ironing tip 17 Solder nozzle 18 Thread solder 20 Swinging mechanism 21 First bracket 22 Second bracket 23 Swinging link 25 Notch 26 First spring 30 Angle adjustment Mechanism 31 Mounting member 32 Mounting hole 33 Fixed 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

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B23K 3/00 H05K 3/34

Claims (9)

(57) [Claims] 1. A head main body having a trowel member having an inclined working angle and a solder nozzle for supplying thread solder to a trowel of the trowel member, and the head main body is attached to a working arm of an automatic soldering machine. A rocking mechanism including two rocking links that are parallel to each other and slant so that the head main body suspends the trowel member in a vertically movable manner. A 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 a lifting drive mechanism for moving,
A soldering head for automatic machines, which is characterized by that. 2. The soldering head according to claim 1, wherein the trowel member has a trowel tip located on the attachment center line in a vertical plane including an attachment center between the working arm and the attachment block. It is arranged in a slanted state with
Four swing links are installed in the vertical plane parallel to the above vertical plane.
It is characterized in that it is arranged so as to be capable of swinging in the vertical plane in an inclined state of 5 degrees or more. 3. The soldering head according to claim 1, wherein the swing mechanism includes a first bracket connected to the mounting block, and the first bracket is vertically moved by the two swing links. A second bracket suspended so as to be freely movable, 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. What is characterized in that means are stretched. 4. The soldering head according to claim 3, wherein the second bracket abuts against the first bracket at the upper limit position and the lower limit position of the trowel member in the notch provided in the first bracket and further. It is housed in such a way that the swing of the is regulated. 5. The soldering head according to claim 3, wherein the working angle of the trowel member is adjustable. 6. The soldering head according to claim 5, wherein an angle adjusting mechanism for adjusting a working angle of the trowel member includes a mounting member extending from the trowel member toward the second bracket, and the mounting member. And an arc-shaped mounting hole formed with a trowel 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 vertically driven by the air cylinder, and a vertical movement of the slider. A guide, 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. The soldering head according to any one of claims 1 to 7, wherein the soldering head is movable in a direction orthogonal to a moving direction of a trowel when moving and continuously soldering a head main body. A linear guide mechanism for supporting the head main body, and a second spring means for urging the head main body in the returning direction. 9. The soldering head according to claim 8, wherein the linear guide mechanism has a first base member in which V-shaped guide grooves are provided on inner surfaces of two parallel outer rails, and the outer rail. Second base member provided with V-shaped guide grooves on the outer surfaces of the two parallel inner rails located inside each other, and freely rollable between the two guide rails of the outer rail and the inner rail that face each other Characterized by comprising a rolling element interposed in the.