JPS6331511Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a transmission conductor used in a high frequency induction heating device.

Figures 1 and 2 show a high frequency induction heating device 19.
In the schematic front and side views, this device includes a high-frequency power source 20, such as a high-frequency oscillator, disposed at a predetermined position, and a head movable relative to a workpiece 21 and for heating the workpiece 21. 22 and a connecting conductor 18 that connects the power supply section 20 and the head section 22. In the high frequency power supply section 20, two fixed transmission conductors 23 such as copper pipes, which can transmit high frequency current as well as cooling water from a pure water circulation device (not shown), are installed horizontally in parallel with each other. . The head section 22 includes a matching transformer 24.
and an inductor 25, and two movable transmission conductors 26, such as copper pipes similar to the fixed transmission conductor 23, are attached to the head portion 22 in parallel and perpendicular to each other. Both conductors 23 and 26 are connected by flexible connecting conductors 18 and 18. The head portion 22 is supported by a moving mechanism (not shown) so as to be movable in three directions: up and down, left and right, and front and rear directions, and the workpiece 21 is automatically fed by a material feeding device.

The connecting conductors 18, 18 are constructed by fitting a flexible conductor into a synthetic resin hose such as a soft vinyl hose, and cooling water is passed through the inside of the hose. The connecting conductors 18, 18 are conventionally disposed perpendicular to the feeding direction (work path line) of the workpiece 21 as shown in the figure, and are connected as described above. Therefore, when the head section 22 is moved when setting the optimal welding position of the workpiece 21, bending or torsion stress is generated at the connection section of the connection conductors 18, 18, reducing the durability of that section and causing the flexible conductor to There was a high risk of water leakage due to the disconnection of the hose and damage to the hose.

This idea was made in view of the above circumstances, and it allows for a large adjustment length that can be moved in the direction of the work path line and a large vertical movement length in response to changes in the size (outer diameter) of the workpiece. It is an object of the present invention to provide a transmission conductor for an induction heating device that does not apply unreasonable bending stress or torsional stress to the connecting portion 27 of 18.

An embodiment of this invention will be described below with reference to the drawings. 3 and 4 are embodiments of the principle diagram shown in FIGS. 1 and 2. In the figures, the head section 22 consists of an output transformer 30, and an induction heating power supply is provided above the output transformer 30. device 34
A pair of flexible conductors 36a and 36b are arranged to be connected to the output conductors 35a and 35b of. The flexible conductors 36a and 36b are arranged so as to be substantially parallel to the direction of the work path line 32,
The output transformer 30 is accommodated in an L-shaped duct 37 arranged and fixed above the output transformer 30 . The opening surface of this L-shaped duct 37 is arranged in a direction substantially perpendicular to the direction of the work path line 32. The flexible conductor 36a, 3
Terminals 38a and 38b are formed at the ends of 6b, and these terminals 38a and 38b are configured to be able to freely come into contact with and separate from the output conductors 35a and 35b.
39 is the output conductor 35a, 35b and the flexible conductor 36
One end of the bellows 39 is fixed to the duct 40 in which the output conductors 35a, 35b are accommodated, and the other end is detachably attached to the opening of the L-shaped duct 37.

The output transformer is mounted and fixed on the mounting base 41 of the moving stage device 31. The moving table device 31 is moved in the left and right Y directions in FIG. 4 by a first drive motor 42, in the up and down X directions in FIG. 3 by a second drive motor 43, and in the up and down Z directions in FIG. 4 by a third drive motor 44. be moved in the direction. Note that the moving table device 31 is connected to the belt 4
5, a drive wheel 46, a rail 47, a guide wheel 48, a stopper 49, and an underframe 50.

FIG. 5 is a sectional view taken along the line B--B in FIG. 3, in which the flexible conductors 36a and 36b are bent as shown in the L-shaped duct 37.

As described above, according to this invention, the flexible conductors 36a, 36b are connected to the work path line 32.
Since it is arranged parallel to the curve and bent in a circular shape, it fully satisfies the following three conditions. (1)
The required moving length in the X direction can be increased to provide a relief so as not to interfere with lifting when replacing the squeeze roll 53 and squeeze roll stud 54, and to set the optimum welding position. (2) The moving length in the Z direction can also be increased depending on the size of the workpiece. (3) Movement in the Y direction can be within a few mm by aligning the pass line core and work coil. Moreover, unreasonable bending stress or torsional stress is not generated at the connection portion of the flexible conductor. Therefore, there is no breakage of the flexible conductor, and there is no possibility of water leakage due to deterioration or damage of the hose, and it is possible to prevent not only the inability to weld due to power supply interruption, but also spillover accidents such as burnout of the output transformer due to water leakage. It has the advantage of maintaining high productivity and high efficiency.

[Brief explanation of the drawing]

1 and 2 are schematic front views and side views of a high-frequency induction heating device, and FIGS. 3 and 4 are plan views illustrating an embodiment of the invention, taken along line A-A in FIG. FIG. 5 is a cutaway front view, and FIG. 5 is a cross-sectional view taken along the line B--B in FIG. 3. 30... Output transformer, 32... Work path line, 35a, 35b... Output conductor, 36a, 3
6b...Flexible conductor, 38a, 38b...Terminal, 3
7... L-shaped duct.

Claims (1)

[Claims for Utility Model Registration] In an induction heating device configured by connecting an output transformer to an induction heating power supply device via a conductor, and connecting an inductor for supplying heating power to a workpiece to the output transformer, the conductor comprises: is formed by an output conductor led out from an induction heating power supply device and a flexible conductor connected in series to this output conductor, and both conductors are covered with a duct,
An induction heating device characterized in that the flexible conductor is arranged parallel to the pass line of the workpiece, and the curved part of the flexible conductor is bent into a circular shape so as to protrude outward. transmission conductor.