Method of cooling welding equipment

专利摘要:
Since the actual operation time of the welding operation is intermittent and short, there is provided a cooling method of the welding apparatus, in which the heat generating portion such as the welder main body or the welding control unit, in particular during the welding operation, is efficiently cooled using the Peltier element. The Peltier element 2 is arranged near the heat generating portion 1 of the welding apparatus, and the Peltier element control current corresponding to the supply of the welding current in the welding apparatus is intermittently supplied to heat heat from the heat generating portion of the welding apparatus. Cooling of welding apparatus for absorption.
公开号:KR20030084638A
申请号:KR20030025024
申请日:2003-04-21
公开日:2003-11-01
发明作者:히구치다이스케；오바라야스히로；마쓰모토히데키；마쓰바야시유타카
申请人:오바라 가부시키가이샤；
IPC主号:

专利说明:

Cooling Method of Welding Equipment {METHOD OF COOLING WELDING EQUIPMENT}
[13] The present invention relates to a cooling method of a welding device for cooling a heat generating portion such as a welder main body, a welding control unit, or the like, which is a heat generating portion in a welding device.
[14] Conventionally, in order to cool the heat generating parts of a welding machine main body, a welding control part, etc. which are heat generating parts in a welding apparatus, water cooling or forced air cooling by always supplying water to the heat generating object used was common.
[15] In the semiconductor device, the cooling of the heat generating portion of the semiconductor device continuously using the Peltier element is known, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-216471.
[16] By the way, in the cooling of the conventional welding apparatus usually performed,
[17] 1) In the case of water cooling by always supplying water to a target heat generating unit, not only the whole apparatus is large but also excessive consideration for preventing leakage of cooling water is necessary.
[18] 2) Even in the case of forcibly air cooling the target heat generating portion, not only the entire apparatus is large, but also an excessive cost is required for the installation.
[19] In addition, in the case where the Peltier element is continuously cooled using the Peltier element, there is a problem that the semiconductor device cannot be sufficiently cooled due to the decrease of the cooling efficiency of the Peltier element with the passage of the cooling time.
[20] SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and its object is that the actual operation time of the welding operation is intermittent and short. It is to provide a cooling method of the welding apparatus to effectively cool the heat generating portion of the Peltier element.
[1] 1 is an equivalent circuit diagram of a cooling method of a welding apparatus according to the present invention.
[2] 2 is a diagram illustrating a supply of welding current to a cooling device.
[3] 3 is a state transition diagram of a cooling element.
[4] 4 is a temperature change diagram of an endothermic surface of a cooling device.
[5] 5 is an explanatory diagram for cooling an electronic component disposed in the welding control unit according to the present invention;
[6] 6 is an explanatory diagram for cooling a shunt of a welding machine according to the present invention;
[7] 7 is an explanatory diagram for cooling an electrode of a welding machine according to the present invention;
[8] 8 is an explanatory diagram for cooling of a welding transformer according to the present invention;
[9] <Explanation of symbols for the main parts of the drawings>
[10] 1, 10, 20, 30, 31, 40: heating element (heating unit)
[11] 2: Peltier element 5: Control line
[12] 6: control circuit
[21] In the cooling method of the welding apparatus in this invention for achieving the said objective, the Peltier element is arrange | positioned in the vicinity of the heat generating part of a welding apparatus, and the Peltier element control current corresponding to supply of the welding current in a welding apparatus is intermittent. It is characterized in that the supply to absorb the heat from the heat generating portion of the welding apparatus.
[22] The Peltier element control current to be supplied intermittently is within the range of an increase in the initial cooling capacity of the Peltier element.
[23] In addition, the cooling of the heat generating portion in the welding device is characterized by using cooling by Peltier element and cooling by water together.
[24] Embodiment of the Invention
[25] Embodiments of the present invention will be described with reference to the accompanying drawings.
[26] 1 is an equivalent circuit diagram for carrying out a cooling method of a welding apparatus according to the present invention, FIG. 2 is a related diagram of welding current and supply to a cooling element, FIG. 3 is a state transition diagram of a cooling element, and FIG. Is the temperature gradient of.
[27] In Fig. 1, reference numeral 1 denotes an electric circuit control element, a transformer, a welder main body, or the like arranged in a welding device, and is a heating element that collectively refers to a component that generates heat during welding in the welding device. 2 is a Peltier element for cooling the heating element 1, and the low temperature side of the Peltier element 2 is in direct heat-absorption operation in contact with the heat generating element 1 or a heat carrier such as a heat pipe, and the high temperature side is, for example, It is made to dissipate heat generated from the Peltier element 2 through the pin 3 and the fan 4. The Peltier element 2 is connected to the control circuit 6 of the welding apparatus via the control lines 5 and 5. In addition, the control circuit 6 stores information from the start to the end of the welding operation so that all of the welding apparatus can be controlled as usual by the control lines 7 and 7 from the control circuit 6. It is becoming.
[28] The correlation of the energization from the control circuit 6 to the control lines 5 and 7 is, for example, as shown in FIG. 2, and the welding start signal is first released from the control circuit 6 for each welding spot. a is generated through the control line 7, the resistance welder enters the pressurization operation by the corresponding signal a to prepare for welding, and when the welding preparation is completed, the current from the control circuit 6 to the electrode of the resistance welder The energized current signal b is sent through the control line 7 to the transformer or the like so as to send the supply for a predetermined time. Further, the welding start signal a disappears after the predetermined curing period of the weld portion passes after the end of the energization current signal b, and the control circuit 6 sends the welding completion signal c from the control circuit 6. In addition, from the control circuit 6, energization is started to the Peltier element 2 via the control line 5 from the generation of the welding start signal a until the energization current signal b is generated. At least until the welding completion signal c is generated.
[29] Therefore, the Peltier element 2 makes a state transition as shown in FIG. That is, the Peltier element 2 has a relatively low temperature by continuous cooling by the normal temperature state or the fin 3 because there is no heat generation such as that the welding apparatus requires cooling in a normal state in which the welder does not perform the welding operation. It is maintained. The Peltier element 2 receives the energization through the control line 5 after the control circuit 6 sends the welding start signal a toward the welding machine side, and the control circuit 6 transmits the energizing current signal b toward the welding machine. The cooling operation is started before sending to cool the heating element 1 of the welding apparatus. Then, the Peltier element 2 is controlled by the control line 5 after energizing for a predetermined time, and ends the cooling operation until the control circuit 6 sends the welding completion signal c to a normal temperature state. Go back. The Peltier element 2 then repeats the above state transition.
[30] As described above, in the present invention, the Peltier element 2 control current corresponding to the supply of the welding current in the welding device is supplied intermittently at each welding spot, and heat from the heat generator 1 which is the heat generating portion of the welding device is intermittently supplied. It is to be absorbed.
[31] Fig. 4 shows the temperature (Celsius) change of the heat absorbing surface during energization of the Peltier element 2 used in the present invention as the vertical axis, and is shown in relation to the passage of time (seconds) on the horizontal axis. The scale is 15 degrees and one division on the horizontal axis is expressed in units of 10 seconds.
[32] As can be seen from this figure, the temperature of the heat absorbing surface of the Peltier element 2 before the start of energization is about 20 degrees at room temperature (varies slightly depending on the season and the surrounding environment, etc.), and is accompanied by the start of energization. The temperature tends to decrease for about a second, and after about 10 seconds, the temperature decreases to about 2 degrees. After that, if the electricity is continued, the temperature of the endothermic surface gradually increases with time, and 60 minutes after the power is applied. Degree is enough. This increase in temperature is due to the transfer of heat from the heat generating surface of the Peltier element 2.
[33] By the way, in general, the command from the welding start signal a in the welding apparatus to the command of the energizing current signal b of the welding machine is several seconds, and the welding energization time by the signal b is about 2 to 3 seconds, so that the Peltier element 2 Even if the furnace is energized after the welding start signal a is transmitted and starts before the energization current signal b is sent, until the time when the welding completion signal c is transmitted, it is within 10 seconds, and this range is the endothermic surface of the Peltier element 2. Since the temperature tends to fall, i.e., falls within the range of increased cooling capacity, effective absorption of heat from the heat generator 1 by the Peltier element 2 becomes possible.
[34] 5 is a schematic explanatory diagram for cooling the heating elements such as SCR, IGBT, and FET, which are electronic components disposed in the welding control unit, by the Peltier element 2. The heating elements of SCR, IGBT, FET, etc. ), The Peltier element 2 is supported by the base 11. The Peltier element 2 is connected to the control circuit 6 by the control lines 5 and 5.
[35] Therefore, even if the heating element 10 generates heat at each welding spot, the Peltier element 2 is energized with good timing at each welding spot through the control circuit 6, so that the Peltier element 2 generates heat of the heating element 10 due to this energization. The endothermic heat is effectively absorbed.
[36] 6 is a schematic explanatory view for cooling the shunt for supplying a welding current to the electrode from the welding transformer with the Peltier element 2, the shunt 20 may be assembled with the base portion 21 in the welder body, Heat is generated by the supply of the welding current. Therefore, the heat absorbing surface of the Peltier element 2 is in direct contact with the base portion 21 of the shunt 20, and the heat sink 22 is formed on the heat generating surface of the Peltier element 2. Also in this case, the Peltier element 2 is connected to the control circuit 6 by the control lines 5 and 5.
[37] Therefore, even if the shunt 20, which is a heating element for each welding spot, generates heat, the Peltier element 2 is energized well by the control circuit 6 for each welding spot, so that the Peltier element 2 causes the shunt 20 to shunt. The endothermic heat is effectively absorbed.
[38] FIG. 7 is a schematic explanatory view for cooling the electrodes 30 and 31 provided in the welder main body with the Peltier element 2, and the electrode 30 is attached to the fixed arm 32 in the vicinity thereof. A plurality of (2) are arranged on the fixed arm 32, and the heat pipe 33 is connected between the electrode 30 and the heat absorbing surface of each Peltier element 2. Further, the electrode 31 is attached to the movable arm 34 in the vicinity thereof, and the Peltier element 2 is disposed at the attachment portion 36 of the guide rod 35 of the movable arm 34, and the electrode 31 is provided. ) And the heat absorbing surface of the Peltier element 2 are connected by a heat pipe 37. Also in this case, the Peltier element 2 is connected to the control circuit 6 by the control lines 5 and 5. 38 denotes a heat sink formed on the heat generating surface of the Peltier element 2, and 39 denotes a driving unit of the movable arm 34.
[39] Therefore, even if the electrodes 30 and 31, which are the heating elements at each of the welding spots, generate heat, the Peltier element 2 is energized well by the control circuit 6 for each welding spot, so that the Peltier element 2 is heated by this energization. Through 33 and 37, the heat of the electrodes 30 and 31 is effectively absorbed.
[40] 8 is a schematic explanatory diagram for cooling the welding transformer 40 with the Peltier element 2, 41 is a primary coil, 42 is a secondary coil, 43 is an electrical insulator, 44 is a core, 45 is a mold resin, 46 denotes a heat pipe, 47 denotes a heat sink, and heat pipes 46 are arranged on the primary coil 41 and the secondary coil 42 of the transformer 40 so as to be welded to the primary coils 41 and the secondary coils 42, respectively. Heat generated from 41 and 42 is moved by the heat pipe 46 to the outside of the transformer 40.
[41] The Peltier element 2 is arranged near the upper portion of the transformer 40, and the heat pipe 46 outside the transformer 40 is connected to the heat absorbing surface of the Peltier element 2.
[42] Therefore, even if the coils 41 and 42 of the welding transformer 40 which are the heating elements for each welding spot generate heat, the Peltier element 2 is energized well by the control circuit 6 for each welding spot. (2) effectively absorbs heat due to heat generation of the coils 41 and 42 through the heat pipe 46.
[43] In the above embodiment, the heat absorption from the heating element is absorbed only by the Peltier element. However, in the present invention, the heat from the heating element may be absorbed by the Peltier element and heat absorption by conventional water.
[44] In this case, since both endotherms are carried out, a cooling device by a Peltier element is simply added to a welding device equipped with a conventional water-cooling unit, and the energization of the Peltier element is performed by the method according to the present invention. It is good to carry out, and also effective endotherm from a heat generating body can be obtained by this.
[45] In the present invention, the Peltier element is disposed near the heat generating portion of the welding apparatus, and the Peltier element control current corresponding to the supply of the welding current in the welding apparatus is intermittently supplied to absorb heat from the heat generating portion of the welding apparatus. As a result, the small-scale Peltier element can effectively absorb the heat absorption from the heat generating element, which is the heat generating portion of the welding apparatus.
[46] In addition, when the Peltier element control current to be supplied intermittently is within the range of the initial cooling capacity of the Peltier element, the Peltier element can more effectively absorb the heat absorption from the heating element that is the heat generating portion of the welding apparatus. It can be.
[47] In the case where the cooling of the heat generating portion in the welding device is used in combination with the cooling by the Peltier element and the cooling by the water, the cooling by the Peltier element can be used together while leaving the conventional water cooling unit as it is. The present invention can be applied to a conventional welding machine and at the same time, it can effectively absorb the heat absorption from the heating element that is the heat generating portion of the welding apparatus.

权利要求:
Claims (3)
[1" claim-type="Currently amended] A method of cooling a heat generating portion in a welding apparatus, comprising: placing a Peltier element near the heat generating portion of the welding apparatus, and intermittently supplying a Peltier element control current corresponding to the supply of the welding current in the welding apparatus. Cooling method of a welding device, characterized in that to absorb the heat from the heat generating portion of.
[2" claim-type="Currently amended] The cooling method of a welding apparatus according to claim 1, wherein the Peltier element control current to be supplied intermittently is within a range of an increase in the initial cooling capability of the Peltier element.
[3" claim-type="Currently amended] The cooling method of the welding apparatus of Claim 1 or 2 which cools the heat generating part in the said welding apparatus together with cooling by a Peltier element, and cooling by water together.

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同族专利:

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公开号 | 公开日

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CN1311208C|2007-04-18|

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KR100744891B1|2007-08-01|

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JP2003311432A|2003-11-05|

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CN1454740A|2003-11-12|

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JP3909755B2|2007-04-25|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2002-04-22|Priority to JP2002118919A

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2002-04-22|Priority to JPJP-P-2002-00118919

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2003-04-21|Application filed by 오바라 가부시키가이샤

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2003-11-01|Publication of KR20030084638A

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2007-08-01|Application granted

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2007-08-01|Publication of KR100744891B1

优先权:

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申请号 | 申请日 | 专利标题

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JP2002118919A|JP3909755B2|2002-04-22|2002-04-22|Cooling method for resistance welding equipment|

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JPJP-P-2002-00118919|2002-04-22|