JPS5932105Y2 - Three-phase rectifier welding transformer - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a three-phase rectifier welding transformer that can easily change the polarity of the object to be welded.

Generally, when performing spot welding and projection welding, the welding result is affected by the current direction when dissimilar metals, metals with different plate thicknesses, metals with protrusions, etc. are used.

For this reason, it is desirable to weld in the direction of current that is optimal for the workpiece, but due to the shape of the workpiece and the assembly line, the vertical relationship of the workpiece is determined, and this may not necessarily be the optimal direction of conduction. .

In such cases, if the polarity of the upper and lower conductors can be freely changed in the welding machine, the welding result will be better, and if the polarity can be easily changed for the workpiece, the versatility of the welding machine will be improved. All you can do is try.

The present invention has been devised in view of the current situation, and the three-phase rectifier welded transformer according to the present invention will be described below with reference to the drawings of FIGS. 1 to 6.

In the figure, 1 is a three-phase coil 1 a, 1 b, IC
This welding transformer main body 1 is built in the welding machine main body, and the welding transformer main body 1 is
Diode blocks 2a, 2b, and 2C corresponding to the coils 1a, 1b, and IC, respectively, are connected to the rear of the circuit so as to have a circuit configuration as shown in FIG.

Further, on the front side of this welding transformer main body 1, there are secondary output terminals 3a, 3b, 3C, 3X, and 3V for each phase.

As shown in FIG. 3, 3z is the secondary output terminal 3a, 3b,
3C is provided on the right side, and secondary output terminals 3x, 3y, and 3Z are arranged in a vertical line on the left side, and furthermore, secondary output terminals 3a, 3b, 3C, 3X, 3y,
Each face of 3Z is flush.

4a, 4b are secondary output terminals 3a, 3b,
3 A conductor connecting the same polarity of the secondary output terminals 3 It is attached to the conductor 4b via the conductor 6a and the conductor 7b.

8 is a lower conductor, and this lower conductor 8 is the conductor 4 a
, 4b, are attached to the conductor 4a via a conductor 7a, and to the conductor 4b via an insulator 6b.

That is, the upper conductor 5 will be electrically connected to the conductor 4b, and the lower conductor 8 will be electrically connected to the conductor 4a.

Furthermore, as shown in FIG. 4, the insulators 6a and 7b interposed between the conductors 4a, 4b and the upper conductor 5 are replaced with each other, and the conductors 4a, 4b and the lower conductor 8 are replaced with each other. Insulator 6b and conductor 7 interposed and attached
By replacing and attaching the upper conductor 5 with the conductor 4a, the upper conductor 5 becomes electrically conductive with the conductor 4a, and the lower conductor 8
is electrically connected to the conductor 4b.

In this way, the upper conductor 5, the lower conductor 8 and the conductor 4 a
, 4b and the insulators 6a, 6b and the conductor 7
By arbitrarily changing the arrangement of a and 7b, the current conduction path, that is, the polarity of the upper conductor 5 and the lower conductor 8 can be arbitrarily set.

Note that the insulators 6a, 6b and the conductors 7a, 7b need to have substantially the same shape and be compatible.

As described above, in the present invention, the secondary output terminals 3a, 3b, 3C, 3X, 3y, 32 of each phase of the welding transformer 1 are located on the same plane, and are connected to compatible insulators 6a, 6b. The upper conductor 5 and the lower conductor 8 are connected via the conductors 7 a and 7 b, and the following effects can be obtained.

(1) The polarity of the upper conductor and lower conductor can be easily exchanged, and by exchanging the polarity, it is possible to perform work with the optimal polarity for the workpiece, which was previously limited by assembly, resulting in good welding results. is obtained.

(2) As a three-phase rectifier welding machine, it can be produced with polarity compatible with a wide variety of objects to be welded, improving versatility and productivity.

(3) The structure is compact, the weight of the welding machine body can be reduced, and the cost can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a three-phase rectifier welding transformer according to an embodiment of the present invention, Fig. 2 is a side view of the welding transformer, and Fig. 3 is the same as shown in Fig. 2. Front view of conductor connection,
Fig. 4 is a perspective view showing the structure of the conductor and insulator, Fig. 5 is a circuit diagram showing the connection relationship between the coils and diode blocks of each phase, and Fig. 6 is a structural diagram of the coils and diode blocks of each phase. It is. 1...Welding transformer main body, 1 a, 1 b, I
C... Coil, 2a, 2b, 2C...
Diode block, 3a, 3b, 3C93X, 3y,
3z...Secondary output terminal, 4a, 4b...
・Conductor, 5...Top conductor, 6a, 6b...
...Insulator, 7 a, 7 b... Conductor, 8
...Lower conductor.

Claims (1)

[Scope of utility model registration request] Secondary output terminals for each phase are provided on the front of the main body of the welding transformer, in which three-phase coils are stacked and diode blocks corresponding to each coil are connected, and the secondary output terminals of the same polarity are connected by a conductor. , a three-phase rectifier welding transformer in which a conductor and an insulator are connected to the conductor, with the upper conductor and the lower conductor being replaceable, interposed alternately between each conductor and insulator.