JP2007005203A - Closure processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closure processor with a matching structure for a high frequency induction heating apparatus saving on a space reducing cost without using any expensive high current resistant type water cooled cable, and reducing current loss. <P>SOLUTION: The matching part 26 for the high frequency induction heating apparatus 40 is composed from a single flat plate 20, a transformer 12, and a capacitor 11 for resonance placed on the flat plate 20. While the transformer 12 and the capacitor 11 for resonance of the matching part 26 are installed in the vicinity of a processing subject (for example, a hollow pipe 14), and a high frequency induction heating coil 13 is connected to the transformer 12, the capacitor for resonance is connected to a main body of the high frequency induction heating apparatus provided with an invertor 4 in a position separated from the matching part 26. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, a high-frequency induction heating coil provided in a high-frequency induction heating device is disposed at a position corresponding to an end of a processing object (for example, a hollow pipe), and an inverter and a matching unit of the high-frequency induction heating device are connected from a high-frequency power source. By sequentially supplying high-frequency power to the high-frequency induction heating coil via the high-frequency induction heating, the end of the object to be processed is pressed against the mold while the end of the object to be processed is subjected to high-frequency induction heating. More particularly, the present invention relates to a matching unit structure of a high-frequency induction heating device that is compact and can be made space-saving and reduce current loss.

  As the high-frequency induction heating device, there are various types of structures for induction heating of various workpieces. As a known technique related to the structure around the high-frequency induction heating coil provided in the high-frequency induction heating device, Japanese Patent Application Laid-Open No. 2001-273975 ( There exists a thing as described in patent document 1).

Moreover, there exists what is shown in FIG. 3 as an example of the high frequency induction heating apparatus which carries out high frequency induction heating of the edge part of a hollow pipe when closing the edge part opening of a hollow pipe. A high frequency induction heating apparatus 1 shown in FIG. 3 includes a loop circuit 3 having a DC power source 2, an inverter 4 having a capacitor 5 and two bridge circuits 6 and 7 provided in the loop circuit 3, These bridge circuits 6 and 7 are provided with switching elements (for example, transistor 8 and diode 9). In addition, this inverter 4 is a voltage type inverter, and is displayed as an example. The bridge circuits 6 and 7 of the inverter 4 are connected to the primary side of the matching transformer 10, and a resonance capacitor 11 is provided on the secondary side of the matching transformer 10. The secondary side of the matching transformer 10 and the resonance capacitor 11 are connected to the primary side of the portable transformer 12, and the secondary side of the portable transformer 12 is connected to the high frequency induction heating coil 13. Thus, the high-frequency induction heating coil 13 is supplied with the required high-frequency power, and the one end 14a of the hollow pipe 14 is pressed against a mold (not shown) while high-frequency induction heating the one end 14a of the hollow pipe 14. It is comprised so that the edge part opening S (refer FIG. 3) may be closed.
JP2001-273975

  However, the closure processing apparatus provided with the high-frequency induction heating apparatus 1 as described above has the following problems. That is, the high frequency induction heating coil 13 and the portable transformer 12 for high frequency induction heating of the one end portion 14a of the hollow pipe 14 need to be disposed in the vicinity of the one end portion 14a of the hollow pipe 14, and the high frequency induction heating apparatus The main body of 1 (the main body of the high-frequency induction heating apparatus 1 in which the inverter 4 and the matching transformer 10 and the like are disposed) is normally made of a relatively large size, and therefore this apparatus main body is disposed in the vicinity of the high-frequency induction heating coil 13. The reality is that we cannot do it. Therefore, the resonance capacitor 11 and the portable transformer 12 are connected by a high-voltage, high-current cooling copper pipe or a water-cooled power cable 15 as shown in FIG. Therefore, the cooling pipe or the water-cooled power cable 15 is expensive and has a disadvantage that a piping space and expensive water leakage prevention means are required.

  On the other hand, in the high frequency induction heating apparatus described in Patent Document 1, the high frequency induction heating coil is fixed to the main body side of the high frequency induction heating apparatus and disposed in the vicinity of the main body. However, when such a high-frequency induction heating apparatus is provided in the above-described closing processing apparatus, the main body (apparatus main body) of the high-frequency induction heating apparatus is a hollow pipe that is a processing target or a hollow pipe. It is difficult to heat and close (close) the end portion of the hollow pipe by interfering with the mechanism portion where the mold that presses the end portion is installed.

  As described above, in the matching portion structure in the high frequency induction heating apparatus shown in FIG. 3 provided in the conventional closing processing apparatus, the high frequency induction heating coil 13 and the portable transformer 12 and the inverter 1 are separated from each other, and resonance occurs. Since the current value of the capacitor 11 is extremely large, the connecting line structure for connecting (connecting) the resonance capacitor 11 and the portable transformer 12 becomes complicated and expensive. And since cooling of a connection line structure location is also important, it is necessary to use expensive members, such as a water cooling cable. Moreover, since the area | region where the shaping | molding die in which the hollow pipe 14 which is a process target (workpiece | work) and its one end part 14a are pressed is generally set narrow, the main body of the high frequency induction heating apparatus 1 provided with the inverter 4 is hollow It is difficult to arrange them close to the pipe 14. On the other hand, in the high-frequency induction heating device as shown in Patent Document 1, it is difficult to install the main body of the high-frequency induction heating device in the vicinity of the hollow pipe 14 that is the object to be processed due to its structure.

  The present invention has been made in view of the actual situation as described above. The object of the present invention is to save space, reduce the cost without using an expensive high-current-resistant water-cooled cable, and reduce the current. An object of the present invention is to provide a closing treatment device having a matching portion structure of a high-frequency induction heating device that can reduce loss.

In order to achieve the above-described object, in the present invention, a high-frequency induction heating coil provided in a high-frequency induction heating device is disposed at a position corresponding to an end of a processing object, and an inverter of the high-frequency induction heating device is provided from a high-frequency power source. And by supplying high-frequency power to the high-frequency induction heating coil sequentially through the matching portion, the end of the object to be processed is pressed against the mold while the end of the object to be processed is subjected to high-frequency induction heating. In the closing processing device for closing the end opening, the matching portion of the high-frequency induction heating device includes a single flat plate, a transformer and a resonance capacitor mounted on the flat plate, and the matching portion The transformer and the resonance capacitor are arranged in the vicinity of the object to be processed, the high frequency induction heating coil is connected to the transformer, and the inverter is located away from the matching portion. The so that connecting the resonant capacitor to the body of the high-frequency induction heating apparatus having a.
In the present invention, a drainage mechanism for draining the cooling water of the transformer and the resonance capacitor from the matching portion is provided on the flat plate.
In the present invention, the cable connecting the main body of the high-frequency induction heating device and the alignment portion is formed by overlapping a plurality of braided wires or thin flat copper plates with an insulating tube around them. Air-cooled type.
In the present invention, the object to be treated is a hollow pipe.

  In the first aspect of the present invention, the matching portion of the high-frequency induction heating device provided in the closing treatment device is constituted by a single flat plate, a transformer and a resonance capacitor mounted on the flat plate, The matching section transformer and the resonance capacitor are arranged in the vicinity of the object to be processed, the high frequency induction heating coil is connected to the transformer, and the main body of the high frequency induction heating apparatus having an inverter located at a position separated from the matching section. Since the resonance capacitor is connected, the matching portion of the high frequency induction heating device can be made compact, space saving can be achieved, current loss can be reduced, and expensive. It is possible to reduce the cost without using a simple cable.

  Further, in the present invention described in claim 2, since the drainage mechanism for draining the leakage cooling water of the transformer and the resonance capacitor from the matching part is provided on the flat plate, the cooling water of the matching part is provided. Water leakage can be discharged from the alignment portion by the drainage mechanism, and the vicinity of the apparatus can be cleaned.

  According to the third aspect of the present invention, there is provided a cable for connecting the main body of the high-frequency induction heating device and the aligning portion, wherein a plurality of braided wires or thin flat copper plates are overlapped around the cable. Since the air-cooled type is formed by covering the insulating tube, it is possible to effectively cool the connecting line structure portion between the main body and the matching portion of the high-frequency induction heating device.

  Further, in the present invention according to claim 4, since the object to be processed is a hollow pipe, the closing operation of the end opening of the hollow pipe can be smoothly performed by a compact closing processing device. it can.

  Hereinafter, an embodiment of a matching portion structure of a high-frequency induction heating device provided in a closing processing device according to the present invention will be described with reference to FIGS. 1 and 2. In FIGS. 1 and 2, the same members as those in FIG. 3 are denoted by the same reference numerals.

  FIGS. 1A, 1B, and 1C are a plan view, a front view, and a side view showing a matching portion structure of a high-frequency induction heating device provided in a closing treatment apparatus according to the present invention. As shown in these figures, on a single flat plate 20 made of an insulating material such as a resin material, a portable transformer 12 having a known structure and a resonance capacitor 11 are placed in a slightly floating state. The portable transformer 12 and the resonance capacitor 11 are connected via a high-voltage coupling tool (lead wire or connecting conductor) (not shown), but the portable transformer 12 and the resonance capacitor 11 are mutually connected. Since the connectors are connected at close positions, the connector is short. A plurality of cooling pipes 21 are connected to the portable transformer 12 and the resonance capacitor 11 in order to cool them (see FIGS. 1A and 1B). , Connected to a cooling source not shown.

  A high frequency induction heating coil 13 is connected to the portable transformer 12. The high frequency induction heating coil 13 is composed of a ring-shaped conductor surrounding one end portion 14a of the hollow pipe 14 (see FIG. 1A).

  As shown in FIGS. 1A and 1C, a plurality of long grooves 22 are formed in the flat plate 20, and drainage grooves 23, 24, and 25 communicating with the long grooves 22 are formed. Through these long grooves 22 and drain grooves 23, 24, 25, leakage cooling water from the portable transformer 12 and the cooling mechanism (not shown) of the resonance capacitor 11 is drained to the outside of the flat plate 20. ing.

  FIG. 2 shows the matching between the matching section 26 (having the single flat plate 20, the portable transformer 12 and the resonance capacitor 11) of the high-frequency induction heating apparatus having the above-described structure and the inverter 4 of the high-frequency induction heating apparatus. The connection structure is shown. In addition, although the current type inverter 30 is used here, the voltage type inverter 4 as shown in FIG. 3 may be used. The current type inverter 30 includes a loop circuit 33 having a DC power source 31 and a DC reactor 32, and a pair of bridge circuits 36 and 37 having a switching element 34 and a diode 35. The bridge circuits 36 and 37 are matched transformers. 10 and the secondary side of the matching transformer 10 is connected to the resonance capacitor 11 of the matching unit 26 via connection lines 38 and 39. The connecting wires 38 and 39 may be ordinary electric wires and may not have special high electric resistance.

  When performing the closing process (closing process) of the end opening S of the hollow pipe 14 using the high-frequency induction heating device 40 of FIG. The high-frequency induction heating coil 13 is placed on the one end portion 14 a of the hollow pipe 14 in a state where the hollow pipe 14 is disposed around the one-end portion 14 a of the hollow pipe 14 and surrounded by the ring-shaped high-frequency induction heating coil 13. It arrange | positions with respect to the position slightly spaced apart. Next, high-frequency power is supplied from the inverter 4 to the high-frequency induction heating coil 13 via the matching transformer 10, whereby the one end portion 14 a of the hollow pipe 14 is high-frequency induction heated to a required temperature. And under this state, the one end part 14a of the hollow pipe 14 is press-contacted with the recessed part of a shaping | molding die outside a figure by applying the pressing force of the direction along an axial direction to the other end part side of the hollow pipe 14. At this time, since the one end portion 14a is in a deformable state by high frequency induction heating, the one end portion 14a is crushed to form a closing portion that closes the end opening S.

  According to the blockage processing apparatus as described above, the resonant capacitor 11 and the portable transformer 12 are placed and disposed on the single flat plate 20, whereby the high frequency induction heating device 40 provided in the blockage processing apparatus is arranged. The matching unit 26 can be configured compactly. Even if the inverter 30 (device main body side) of the high-frequency induction heating device 40 is large-sized, only the matching portion 26 provided on the single flat plate 20 is installed on the hollow pipe 14 side. For this reason, even if the space around the hollow pipe 14 that is the object to be processed (that is, the work placement space) is narrow, the alignment portion 26 and the hollow pipe 14 can be disposed in the narrow space, thereby saving space. It becomes possible. Further, as described above, since the portable transformer 12 and the resonance condenser 11 are arranged close to each other on the flat plate 20, the connecting tool (lead wire) may be short, and the current loss is reduced. Effective high-frequency induction heating can be performed.

  Any portable transformer 12 may be used according to the purpose. For example, a transformer of 500 kVA with a transformation ratio of 6: 1 is adopted as an example. For example, four resonance capacitors 11 are provided, and a flat water-cooled capacitor (for example, a water-cooled capacitor manufactured by Selem Co., Ltd.) is used. Of course, it is not limited to these. Further, the volume of the outline of the aligning portion 26 shown in FIG. 1 is a relatively compact 630 mm (length) × 140 mm (height) × 140 mm (depth).

  Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention. For example, in the above-described embodiment, the closing processing device for closing the end opening S of the hollow pipe 14 has been described. However, the present embodiment is also applicable to the case of performing a closing process on a workpiece (processing object) having an end opening. The closing processing device of the invention can be applied.

It is a figure which shows the structure of the matching part of the high frequency induction heating apparatus with which the closing processing apparatus which concerns on one Embodiment of this invention is equipped, Comprising: Fig.1 (a) is a top view of a matching part, FIG.1 (b) is a matching part. Front view (b) and FIG. 1 (c) are side views of the alignment portion. It is a circuit diagram which shows the connection structure between the matching part of FIG. 1, and the inverter of a high frequency induction heating apparatus. It is a circuit diagram which shows the structure which connects the inverter and high frequency induction heating coil of the high frequency induction heating apparatus in the conventional closing processing apparatus for performing the closing (closing) process of a hollow pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 40 High frequency induction heating apparatus 2 DC power supply 4,30 Inverter 10 Matching transformer 11 Resonance capacitor 12 Portable transformer 13 High frequency induction heating coil 14 Hollow pipe 14a One end 20 Flat plate 21 Cooling pipe 22 Long groove 23, 24, 25 Drainage Groove 26 Alignment part 38,39 Connecting line S End opening

Claims (4)

The high frequency induction heating coil provided in the high frequency induction heating device is disposed at a position corresponding to the end of the object to be processed, and the high frequency induction heating coil is sequentially passed from the high frequency power source through the inverter and matching unit of the high frequency induction heating device. In the closing processing apparatus for closing the end opening of the processing object by pressing the end against the mold while supplying high-frequency power to the end of the processing object while induction-heating the end of the processing object,
The matching part of the high-frequency induction heating device is composed of a single flat plate, a transformer and a resonance capacitor placed on the flat plate,
The matching section transformer and the resonance capacitor are arranged in the vicinity of the object to be processed,
The high frequency induction heating coil is connected to the transformer, and the resonance capacitor is connected to the main body of the high frequency induction heating apparatus having the inverter at a position spaced apart from the matching portion,
A closing processing device.   The closing processing apparatus according to claim 1, wherein a drainage mechanism for draining leakage cooling water of the transformer and the resonance capacitor from the matching portion is provided on the flat plate.   An air-cooling type cable in which a plurality of braided wires or thin flat copper plates are stacked and covered with an insulating tube around the cable for connecting the main body of the high-frequency induction heating device and the matching portion. The closing processing device according to claim 1 or 2, wherein   The closing processing apparatus according to claim 1, wherein the processing object is a hollow pipe.

Images