JPH028617Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is designed to connect a continuous flange portion formed at the periphery of a container such as a radiator or a gasoline tank, consisting of a straight line portion and a corner portion, to an upper and lower seam electrode. The present invention relates to a pin guide type automatic welding line welding device for seam welding that guides the welding line between upper and lower electrodes using electrode driving force while applying pressure and applying current between them.

(Prior Art) As a conventional device of this type, the devices described in Japanese Patent Publication No. 52-22746 and Japanese Patent Publication No. 54-3012 are known.

In both of these devices, a half-moon cam is fixed to the center point of the bend of each corresponding corner of the workpiece on a rotary table, and this half-moon cam is inserted into a guide groove of a guide rail fixed to the underside of the seam electrode. The straight part of the welding line is moved, and the corners of the welding line are guided by engaging the outer periphery of the half-moon cam with cam stoppers provided in the guide groove of the guide rail, causing the welding line to move in an arc.

(Problem to be solved by the invention) However, with these devices, when aligning the seam welding locus with the electrode pressurizing point, if the guide rail is fixed, it takes a lot of time and effort to adjust the position. Moreover, since it is not possible to make fine adjustments according to the nature of the workpiece, the structure of the entire guide rail must be changed every time the workpiece is changed, which raises concerns about increased costs.

(Means for Solving the Problems) The present invention attempts to solve the drawbacks of these conventional devices, and the specific means is to rotate the workpiece consisting of a straight part and a corner part in a horizontal plane. This is an automatic seam welding wire rotating feed device that feeds the target welding wire between a pair of seam electrodes, and it has a rotating plate that rotates the workpiece, and this rotating plate corresponds to each corner of the workpiece. A series of main guides are fixed in position at the center point of the bending, and a series of main guides are arranged below the seam electrode. A guide rail configured to remove the main guide from the guide rail, and a guide stopper within the guide rail that guides the rotation of the main guide while contacting the outer periphery of the main guide and allows passage of the main guide through a notch formed on the outer periphery. The guide rail is characterized in that the movement of the guide rail can be adjusted via an adjusting mechanism.

(Function) According to the present invention, since the guide rail can be moved arbitrarily in the left-right and front-back directions using the adjust mechanism, it is possible to accurately and easily align the weld line with the seam electrode pressurizing position. It can be carried out.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 in the figure is the welding machine body. 2 and 3 are upper and lower seam electrode rings. 4 is a rotating plate, and this rotating plate has multiple arms 0
It is attached to a bearing 5 at the tip of the arm so that it can freely rotate in a horizontal plane in front of the seam electrode by a link device (details omitted) that rotatably connects the two. Reference numeral 6 denotes a main guide, which is fixed at a bending center point of the rotary plate 4 corresponding to each corner of the workpiece W to be welded.

A notch 6a having a thickness e ₁ is formed in the main guide, and a tapered surface 6b that becomes lower toward the inside is formed at the tip of the notch 6a.
This parting surface engages with a tapered surface 11a formed on an opening/closing plate 11 of a ratchet device 12, which will be described later.
To facilitate entry of a main guide into a guide groove. Reference numeral 7 denotes an auxiliary pin having a rotating roller 8 at its tip. This pin is shorter than the main guide, and is fixed at a position substantially inside the line A connecting the center points of the adjacent main guides 6.

Reference numeral 9 denotes a guide rail into which the main guide 6 and the auxiliary pin 7 enter and guide them linearly.

This guide rail is constituted by a front rail plate 9a and a rear rail 9b, and forms a guide groove 10 having a width _e3 sufficient to allow the main guide 6 to pass through the main guide ₆ having a thickness e2.

The front rail plate 9a is equipped with a ratchet device 12 having an opening/closing plate 11 at a location where the main guide 6 enters, and cutout openings 13a, 1 at locations where the auxiliary guide can enter and leave.
3b and 13c are provided, respectively.

This guide rail 9 is provided with adjuster mechanisms 17 attached to both sides of the main body 1 so that the weld line W ₁ of the workpiece W can be accurately adjusted to the electrode pressurizing position.
The adjustment mechanism 18 is attached laterally to the tip of this mechanism, and by screw adjustment, the movement in the front and rear and left and right directions can be adjusted.

That is, the guide rail 9 is inserted into the elongated hole 0 formed in the rear rail plate 9b, for example, so that the rear rail plate 9b can be moved in the left-right direction with respect to the rail support plate 9c attached laterally to the tip of the adjusting mechanism 17. It is attached to the front surface of the rail support plate 9c via bolts 20, and the adjustment mechanism 18
By adjusting the screw, the rear rail plate 9b can be moved to the rail support plate 9.
It is possible to move in the left and right direction by the permissible range of the elongated hole 0 with respect to c.

Reference numeral 14 denotes a guide stopper, which is fixed in position within a guide rail that intersects with the rotational axis (B-B) of the seam electrode just below it. This guide stopper is formed with a curved guide surface that engages with the arcuate guide portion 6a of the main guide and rotates and guides the main guide.
As a result, a guide groove 10 is formed in a part of the guide rail and has a width e ₄ that is large enough to allow only the thickness e ₁ of the notch of the main guide to pass through. 15 is a stopper device. This stopper device has a stopper pin 15a that can freely extend and retract in a direction across the guide groove 10, and when the main guide pushes this stopper pin open and passes through it, it becomes an original position stopper.

Reference numeral 16 denotes a back up plate, which is made of a synthetic resin material attached to the rear rail plate 9b at the position where the main guide hits, in order to absorb the impact of the main guide when it enters the guide rail. It is a hard rubber.

The operation of the device of the present invention will be explained below with reference to FIG.

First, as a procedure, the workpiece W to be welded is placed above the rotating plate 4.
Set it so that it does not move. Then, the upper and lower seam electrodes ₂ ,
3 and rotate the electrode while applying a constant pressure and current to start seam welding along the weld line of the flange.

In addition, when aligning the seam welding locus with the electrode pressurizing point in the device of the present invention, the guide rail 9
may be moved back and forth or left and right by the adjusting mechanisms 17 and 18. For example, as shown in FIG. 4, if the weld line W ₂ of the workpiece is deviated forward from the electrode pressurizing points of the upper and lower seam electrodes 2 and 3, adjust the adjustment mechanism 17 with the screw. By doing this and moving the guide rail 9 in the direction of arrow A, welding line W ₂ can be aligned with the normal position of W ₁ passing through the electrode pressurizing position.

In addition, as shown in Figure 5, the weld line of the workpiece
If W ₂ is misaligned (to the right) from the pressure points of the upper and lower seam electrodes 2 and 3, adjust the screws on the adjuster mechanism 18 to move the guide rail 9 in the direction of arrow B. , the welding line W ₂ can be accurately aligned with the position of W ₁ passing through the electrode pressurizing position.

The arrow → indicates the direction of welding progress.

Now, when welding is started from the planned position of the welding straight part ○a, the main guides 6 ₁ and 6 ₂ corresponding to the center point of bending with the corner part enter the guide groove 10 of the guide rail 9 and remain as they are. Move in the direction of the arrow → parallel to the welding straight part ○a.

In this case, the auxiliary pins 7a and 7b provided between the main guides 6 ₁ and 6 ₂ are such that the main guide 6 ₁ leading the guide rail 9 is connected to the other main guides 6 ₂ to 6 2 .
When passing through the position where 6 ₇ is allowed to leave, the main guide 6 ₂ that follows comes into contact with the front rail plate 9a.
I will guide you along with you. In other words, the workpiece W
If the distances of the welded straight parts are different, the leading main guide may pass through another opening position even though the straight parts are welded. Next, the auxiliary pin moves along the guide rail at a higher position than the main guide, guiding the welding straight part ○a to the electrode pressurizing point.

Next, when the starting point of the corner reaches the electrode pressurizing point, the following main guide ₆₂ contacts the guide stopper 14 of the guide rail and cannot move forward, but the driving force of the electrode is still applied.
The main guide ₆ starts a rotational movement in accordance with the bending center angle θ of the corner portion. At this time, the leading main guide 6 ₁ and auxiliary guides 7a, 7
b comes off from the detachment point provided at a predetermined position on the guide rail.

In this way, the welding curve corresponding to the previous corner will be guided to the electrode pressing point. Then, after going around the corner, the main guide 6 ₂
The notch passes through the guide groove 10' of the guide stopper 14.

When moving on to the next straight welding section ○○, the following main guide 6 ₂ described above becomes the preceding main guide and at the same time the next following main guide 6.
₃ jumps over the ratchet device 12' from the outside of the guide rail, and thereafter the two main guides move along the guide rail to guide the welding straight portion ○○ to the electrode pressurizing point. In this case, the auxiliary pin 7c serves as an auxiliary guide in the same manner as described above so that the preceding main guide ₆₂ does not come out of the other opening position.

On the other hand, when the main guide goes around the corner, it enters so as to hit the guide rail. At this time, normally a bounce phenomenon occurs due to the impact of the main guide, but in this case, the impact is elastically absorbed by the back up plate 16, increasing the shock prevention effect.

The welding work will be completed once the above operations are repeated in the same way.

(Effect of the invention) As explained above, according to the device of the present invention,
By adopting an adjuster mechanism, the guide rail can be moved and adjusted freely in the left-right and front-back directions, making it possible to accurately and easily adjust the positioning of the seam electrode at the weld line. It is possible to fully respond to changes in workpieces without changing the structure of the guide rail, reducing costs, improving workability, and stabilizing welding quality.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a seam weld line automatic rotation feed device in a seam welding machine according to the present invention. FIG. 2 is a plan view for explaining the operation of the device. FIG. 3 is a front view showing the main parts of the device of the present invention. FIG. 4 is an explanatory diagram showing the movement adjustment in the welding line front and back direction by the adjuster mechanism 17. FIG. 5 is an explanatory view showing adjustment of movement of the weld line in the left-right direction by the adjuster mechanism 18. Explanation of symbols, 1... Welding machine main body, 2, 3... Seam electrode, 4... Rotating plate, 6... Main guide,
7... Auxiliary pin, 6a... Notch, 9... Guide rail, 12... Ratchet device, 16... Back up plate, 17, 18... Adjustment mechanism.

Claims (1)

[Scope of utility model registration request] This is an automatic seam welding line rotation feeding device that feeds the target welding line between a pair of seam electrodes while rotating the workpiece, which consists of a straight part and a corner part, in a horizontal plane. A plate, a series of main guides fixed in position at bending center points corresponding to each corner of the object to be welded, and a series of main guides arranged below the seam electrode, each of which is inserted from a predetermined position. , and a guide rail configured to guide the main guide parallel to the welding line and to remove the main guide from a predetermined position, and a guide rail configured to guide the main guide in parallel with the welding line and to detach the main guide from a predetermined position, and a guide rail configured to guide the rotation of the main guide while contacting the outer periphery of the main guide within the guide rail. . A seam weld line automatic rotation feed device, comprising a guide stopper for allowing passage through a notch formed on the outer periphery, wherein the guide rail is movable and adjustable via an adjuster mechanism.