WO2010109759A1 - 溶接制御方法 - Google Patents
溶接制御方法 Download PDFInfo
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- WO2010109759A1 WO2010109759A1 PCT/JP2010/001027 JP2010001027W WO2010109759A1 WO 2010109759 A1 WO2010109759 A1 WO 2010109759A1 JP 2010001027 W JP2010001027 W JP 2010001027W WO 2010109759 A1 WO2010109759 A1 WO 2010109759A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/073—Stabilising the arc
- B23K9/0735—Stabilising of the arc length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
Definitions
- the present invention relates to a welding control method of arc welding in which welding is performed by generating an arc between a welding wire which is a consumable electrode and a base material which is an object to be welded.
- the protruding length of the wire changes and the arc length changes due to the gap between the workpieces.
- the arc length also changes due to hand movement of the welding operator. Since the arc length changes due to such disturbances, the welding quality can not be improved.
- the lowering inclination is generally about 1 V to 3 V / 100 A, but depending on the welding method or welding wire, it may be 0 V / 100 A or may be lowered at an inclination of about 10 V / 100 A.
- the difference between the welding output voltage and the welding setting voltage is used to increase or decrease at least one of the base current and the peak current (See, for example, Patent Document 1). If the arc becomes unstable by this control method, that is, if the welding output voltage largely fluctuates due to disturbance, the pulse frequency is changed by increasing or decreasing the base current or peak current to correct the large fluctuation amount. It can be suppressed. Thereby, the arc length can be stabilized, irregular short circuit occurrence can be suppressed, and sputtering can be suppressed.
- this output control method there is a problem that it takes time to restore the original arc length.
- the welding control method of the present invention is a welding control method of a welding apparatus having an output characteristic of a predetermined inclination indicating a relationship between a welding output voltage and a welding output current, and according to a difference between an initial welding set voltage and a welding output voltage Control the welding output voltage to be the target welding setting voltage by setting the target welding setting voltage higher than the initial welding setting voltage or setting the target welding setting voltage lower than the initial welding setting voltage It has composition.
- the welding control method of the present invention is a welding control method of a welding apparatus having an output characteristic of a predetermined inclination indicating a relationship between a welding output voltage and a welding output current, and a pulse immediately before a pulse at a certain point in time during welding.
- Set a target welding setting voltage higher than the initial welding setting voltage or set a target lower than the initial welding setting voltage according to the difference between the welding output voltage and a plurality of pulse welding output voltages output before the immediately preceding pulse By setting the welding set voltage, the welding output voltage is controlled to be the target welding set voltage.
- the welding control method of the present invention is a welding control method of a welding apparatus having an output characteristic with a predetermined inclination indicating a relationship between a welding output voltage and a welding output current, and a difference between an initial welding set current and a welding output current According to the target welding setting current higher than the initial welding setting current, or by setting the target welding setting current lower than the initial welding setting current, the welding output current becomes the target welding setting current. It has a configuration to control.
- the arc length can be stabilized at an early stage with respect to the change of the arc length generated by the disturbance, and the stable droplet transfer can be performed.
- irregular short circuit occurrence can be suppressed and spattering can be suppressed, whereby productivity improvement and welding quality improvement can be realized.
- FIG. 1 is a schematic configuration view showing a welding apparatus to which a welding control method according to an embodiment of the present invention is applied.
- FIG. 2 is a diagram showing output characteristics of a welding current and a welding voltage in the embodiment of the present invention.
- FIG. 3 is a diagram showing other output characteristics of welding current and welding voltage in the embodiment of the present invention.
- FIG. 4 is a diagram showing a welding current waveform according to an embodiment of the present invention.
- FIG. 5 is a diagram showing output characteristics of the conventional welding current and welding voltage.
- FIG. 1 is a schematic configuration view showing an example of a welding apparatus to which a welding control method according to an embodiment of the present invention is applied.
- Welding apparatus 1 shown in FIG. 1 includes a storage unit 7 storing output characteristics as a mathematical expression, an initial condition setting unit 8 for setting an initial welding condition and the like, an output characteristic stored in storage unit 7 and a welding voltage detection unit An output characteristic setting unit 6 that sets an output characteristic based on the output from the welding current detection unit 4 and the output from the initial condition setting unit 8, and the output control unit 2 based on the output of the output characteristic setting unit 6 And a driving command unit 5 for driving the vehicle.
- output control unit 2 performs output control such as inverter control or thyristor control in response to a signal from drive command unit 5, whereby a distance between torch 11 and base material 12 is obtained. Voltage and current are supplied to the welding wire 9, the arc 13 is generated between the welding wire 9 supplied from the wire feeding device 10 to the torch 11, and the base material 12, and the base material 12 is welded.
- FIG. 2 is a diagram showing output characteristics of a welding current and a welding voltage when welding is performed by the welding control method in the present embodiment.
- FIG. 3 is a diagram showing other output characteristics of welding current and welding voltage in the present embodiment. 2 and 3, the initial welding set current is A1, and the initial welding set voltage is V1. The initial welding set current and the initial welding set voltage are set by the operator operating the welding apparatus by the initial condition setting unit 8 provided in the welding apparatus.
- the output characteristic A, the output characteristic B and the output characteristic C in FIG. 2 and the output characteristic D and the output characteristic E in FIG. 3 show the output characteristic of the welding device 1.
- the output characteristic A is a linear output characteristic passing through the initial welding set current A1 and the initial welding set voltage V1, and is a basic output characteristic.
- the output characteristic B and the output characteristic C, and the output characteristic D and the output characteristic E indicate output characteristics in a state in which the basic output characteristic A is translated, as described later.
- the output characteristic is stored as a mathematical expression in the storage unit 7 provided in the welding apparatus, and the segment is changed by the output characteristic setting unit 6 to be translated without changing the inclination. .
- the arc characteristic K1, the arc characteristic K2, the arc characteristic K3 and the arc characteristic K4 respectively indicate the relation between the current and the voltage in the case of arc length L1, arc length L2, arc length L3 and arc length L4. It is shown.
- the arc length L1 is an arc length in the case of the initial welding set current and the initial welding set voltage set by the operator, and is taken as an appropriate arc length.
- the arc length L2 is shorter than the arc length L1.
- the arc length L3 is longer than the arc length L2 and shorter than the arc length L1.
- the arc length L4 is longer than the arc length L2 and the arc length L3 and shorter than the arc length L1.
- the arc characteristic K1, the arc characteristic K5, the arc characteristic K6 and the arc characteristic K7 respectively indicate the relation between the current and the voltage in the case of arc length L1, arc length L5, arc length L6 and arc length L7. It is shown.
- the arc length L1 is an arc length in the case of the initial welding set current and the initial welding set voltage set by the operator, as in FIG. 2, and this is taken as an appropriate arc length.
- the arc length L5 is longer than the arc length L1.
- the arc length L6 is shorter than the arc length L5 and longer than the arc length L1.
- the arc length L7 is shorter than the arc length L5 and the arc length L6 and longer than the arc length L1.
- a welding control method of the present embodiment will be described. Basically, it is fundamental to perform welding with an appropriate arc length by controlling the welding output so as to obtain the initial welding set current and the initial welding set voltage. However, when the arc length is not appropriate due to some influence, control as described later is performed to make the arc length early an appropriate arc length.
- the welding output current has substantially the same value as the initial welding set current A1, and the welding output voltage is welded at the substantially same value as the initial welding set voltage V1 (appropriate arc length L1 and From the state P1 which is the intersection of the output characteristic A and the arc characteristic K1 when the arc length is shortened (a short arc length L2) due to disturbance such as camera shake, for example. It moves to the state P2 which is an intersection point. As a result, the welding output current increases from A1 to A2, and the welding output voltage decreases from V1 to V2.
- the arc length is from an appropriate arc length L1 based on the arc characteristic K1 to an arc length L2 based on the arc characteristic K2 shorter than the arc length L1.
- the target welding set voltage is increased according to the difference between the initial welding set voltage V1 and the welding output voltage V2 which is lower than the initial welding set voltage V1. That is, the output characteristics are translated. And welding output is controlled so that it may become target welding set voltage.
- the heat input is positively given to the welding portion including the wire 6 to increase the melting of the wire 6 so that the arc length L1 can be promptly set. Do.
- the target welding set voltage may be a value obtained by increasing the difference between the initial welding set voltage V1 and the welding output voltage from the initial welding set voltage V1.
- the value may be larger than the initial welding set voltage V1 by an amount smaller than the difference between the initial welding set voltage V1 and the welding output voltage.
- the value may be larger than the initial welding set voltage V1 by an amount larger than the difference between the initial welding set voltage V1 and the welding output voltage.
- the state P2 on the output characteristic A is transferred to the state P3 via the state P3 'on the output characteristic B.
- the welding output current increases from A2 to A3 and the welding output voltage increases from V2 to V3 '.
- the arc length increases in a short time from L2 to L3 which is longer than L2, and approaches the arc length L1 in the proper state P1.
- V4 V1 + ⁇ V4
- the state P3 on the output characteristic B is transferred to the state P4 via the state P4 'on the output characteristic C. Therefore, the welding output current decreases from A3 to A4, and the welding output voltage increases from V3 'to V4'.
- the arc length increases in a short time from L3 to L4, which is longer than L3, and further approaches the arc length L1 of the proper state P1.
- the output characteristic is compared with the output characteristic A to the output characteristic B and the output characteristic C a plurality of times as compared with the case of FIG.
- the arc length L1 of the proper state P1 can be restored more quickly.
- the welding output current has substantially the same value as the initial welding set current A1, and the welding output voltage is welded at the substantially same value as the initial welding set voltage V1 (appropriate arc length From L1), for example, when the arc length is increased due to disturbance such as camera shake (long arc length L5), state P1 which is the intersection of output characteristic A and arc characteristic K1 to output characteristic A and arc characteristic K5 To the state P7, which is the point of intersection with the As a result, the welding output current decreases from A1 to A5, and the welding output voltage increases from V1 to V5.
- the arc length is from an appropriate arc length L1 based on the arc characteristic K1 to an arc length L5 based on the arc characteristic K5 longer than the arc length L1.
- the target welding set voltage is lowered according to the difference between the initial welding set voltage V1 and the welding output voltage V5 higher than that. That is, the output characteristics are translated. And welding output is controlled so that it may become target welding set voltage.
- the heat input to the welding portion including the wire 6 is positively suppressed to reduce the melting of the wire 6, and the arc length L1 can be set early.
- the target welding set voltage may be a value reduced from the initial welding set voltage V1 by the difference between the initial welding set voltage V1 and the welding output voltage.
- the value may be smaller than the initial welding set voltage V1 by an amount smaller than the difference between the initial welding set voltage V1 and the welding output voltage.
- the value may be smaller than the initial welding set voltage V1 by an amount larger than the difference between the initial welding set voltage V1 and the welding output voltage.
- Change from A to output characteristic D As a result, the state P7 on the output characteristic A is transferred to the state P8 via the state P8 'on the output characteristic D. Therefore, the welding output current decreases from A5 to A6, and the welding output voltage decreases from V5 to V6 '.
- the arc length shortens in a short time from L5 to L6 which is shorter than L5, and approaches the arc length L1 in the proper state P1.
- the state P8 on the output characteristic D is transferred to the state P9 via the state P9 'on the output characteristic E. Therefore, the welding output current increases from A6 to A7, and the welding output voltage decreases from V6 'to V7'.
- the arc length shortens in a short time from L6 to L7 which is shorter than L6, and further approaches the arc length L1 of the proper state P1.
- the output characteristic is compared with the output characteristic A to the output characteristic D and the output characteristic E a plurality of times as compared with the case of FIG.
- the arc length L1 of the proper state P1 can be restored more quickly.
- the target welding set voltage when the welding output voltage is higher than the initial welding set voltage, the target welding set voltage is changed to a lower direction, and the welding output voltage is initially If lower than the welding set voltage, the target welding set voltage is changed to a higher direction.
- the welding device has an output characteristic with a predetermined slope indicating the relationship between the welding output voltage and the welding output current.
- the above control is applied to pulse arc welding, and the welding setting voltage is increased according to the difference between the pulse welding voltage output immediately before the pulse at a certain point in time and the welding voltage output of the plurality of pulses output before the last pulse.
- the direction or the welding set voltage may be changed to a lower direction.
- a plurality of welding pulses are output during welding, but when a certain pulse is output, the waveform of the certain pulse is determined during welding, and the welding output is controlled to output the waveform. ing.
- the average voltage of the immediately preceding pulse is compared with the average voltage of 10 pulses immediately before that pulse, and if the averaged voltage of the immediately preceding pulse is low, This is the same as the case of changing from the state P1 to the state P2 in FIG. 2, so as described above, the setting voltage is increased to move to the state P3. Then, thereby, the arc length is positively lengthened from the shortened arc length L2 to the arc length L3, and as described above, the parallel shift of the output characteristics is repeated, whereby the arc length L1 is promptly restored. You may do so.
- the average voltage of the immediately preceding one pulse is high, the opposite control to the low voltage may be performed.
- control may be performed to change the magnitude of at least one of the base current and the peak current along with the change of the welding set voltage.
- the pulse period is about 10 msec (the pulse frequency is about 100 Hz), and the pulse width is about 2.0 msec. Even if each of them changes greatly, the pulse period is ⁇ 2 msec, the pulse width is ⁇ 0.4 msec, and only ⁇ 20% changes.
- the time for which the base current flows is 8 msec, the magnitude of the base current changes by 80% when adjusted. And, it is possible to change 100% when the peak current flows time together, and it is possible to greatly change the welding voltage, which is effective for the early adjustment of the arc length.
- the next pulse peak current is increased by ⁇ IP when the target welding setting voltage is increased by the next pulse, or
- the base current is increased by ⁇ IB, or both the next pulse peak current and the next base current are increased.
- the target welding set voltage is changed according to the difference between the initial welding set voltage and the welding output voltage.
- the target welding set according to the difference between the initial welding set current and the welding output current The output characteristics may be changed in the direction of increasing the current or in the direction of decreasing the welding set current.
- the arc length is not constant due to the occurrence of positional deviation of the work or when the precision of the work is not good, and the arc length is not constant and changes.
- the arc length is stabilized early, and the stable droplet transfer is enabled. That is, even if the arc length becomes unstable due to the disturbance, the arc length can be returned to the original proper arc length at an early stage in a state where the droplet transfer is stabilized, so that a good bead can be obtained. .
- irregular short circuit occurrence can be suppressed and spattering can be suppressed, whereby productivity improvement and welding quality improvement can be realized.
- the welding control method of the present invention since the arc length can be stabilized at an early stage in the state of stable droplet transfer, irregular short circuit occurrence can be suppressed and spatter can be suppressed. Therefore, since productivity improvement and welding quality improvement can be realized, it is useful as a welding control method which performs arc welding.
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Abstract
Description
以下、本発明の溶接制御方法を実施の形態に基づいて、図面を参照しながら説明する。しかし、本発明は、実施の形態に限定されるものではない。図1は、本発明の一実施の形態における溶接制御方法が適用される溶接装置の一例を示す概略構成図である。
2 出力制御部
3 溶接電圧検出部
4 溶接電流検出部
5 駆動司令部
6 出力特性設定部
7 記憶部
8 初期条件設定部
9 溶接用ワイヤ
10 ワイヤ送給装置
11 トーチ
12 母材
13 アーク
Claims (11)
- 溶接出力電圧と溶接出力電流の関係を示す所定の傾きの出力特性を有する溶接装置の溶接制御方法であって、
初期溶接設定電圧と前記溶接出力電圧との差に応じて、前記初期溶接設定電圧よりも高い目標溶接設定電圧を設定し、または、前記初期溶接設定電圧よりも低い前記目標溶接設定電圧を設定することで、前記溶接出力電圧が前記目標溶接設定電圧となるように制御する溶接制御方法。 - 前記溶接出力電圧が前記初期溶接設定電圧より高い場合には、前記目標溶接設定電圧を低くする方向へ変更し、前記溶接出力電圧が前記初期溶接設定電圧より低い場合には、前記目標溶接設定電圧を高くする方向へ変更する請求項1記載の溶接制御方法。
- 前記目標溶接設定電圧は、前記初期溶接設定電圧と前記溶接出力電圧との差よりも小さい量だけ前記初期溶接設定電圧から大きくした、または、小さくした値である請求項1記載の溶接制御方法。
- 溶接出力電圧と溶接出力電流の関係を示す所定の傾きの出力特性を有する溶接装置の溶接制御方法であって、
溶接中のある時点のパルスの直前のパルス溶接出力電圧と前記直前のパルスの前に出力した複数のパルス溶接出力電圧との差に応じて、初期溶接設定電圧よりも高い目標溶接設定電圧を設定し、または、前記初期溶接設定電圧よりも低い前記目標溶接設定電圧を設定することで、前記溶接出力電圧が前記目標溶接設定電圧となるように制御する溶接制御方法。 - 前記溶接中のある時点のパルスの直前のパルス溶接出力電圧の平均値と前記直前のパルスの前に出力した複数のパルス溶接出力電圧の平均値との差に応じて、前記目標溶接設定電圧を設定する請求項4記載の溶接制御方法。
- 前記溶接中のある時点のパルスの直前のパルス溶接出力電圧の平均値が、前記直前のパルスの前に出力した複数のパルス溶接出力電圧の平均値より高い場合には前記目標溶接設定電圧を前記初期溶接設定電圧より低くし設定し、低い場合には目標溶接設定電圧を前記初期溶接設定電圧より高く設定する請求項4記載の溶接制御方法。
- 前記目標溶接設定電圧の変更とともにパルス溶接ベース電流とピーク電流の少なくとも一方の大きさを変更する請求項1から6のいずれか1項に記載の溶接制御方法。
- 前記目標溶接設定電圧に対して前記溶接出力電圧が低い場合には、前記パルス溶接ピーク電流のピーク電流値を増加させる、および、前記パルス溶接ベース電流のベース電流値を増加させる、のうち少なくとも一方を行なう請求項7記載の溶接制御方法。
- 溶接出力電圧と溶接出力電流の関係を示す所定の傾きの出力特性を有する溶接装置の溶接制御方法であって、
初期溶接設定電流と溶接出力電流との差に応じて、前記初期溶接設定電圧よりも高い目標溶接設定電流を設定し、または、前記初期溶接設定電流よりも低い目標溶接設定電流を設定することで、前記溶接出力電流が前記目標溶接設定電流となるように制御する溶接制御方法。 - 前記溶接出力電流が前記初期溶接設定電流より高い場合には、前記目標溶接設定電流を前記初期溶接設定電流よりも低くする方向へ変更し、前記溶接出力電流が前記初期溶接設定電流より低い場合には、前記目標溶接設定電流を高くする方向へ変更する請求項9記載の溶接制御方法。
- 前記目標溶接設定電流は、前記初期溶接設定電流と前記溶接出力電流との差よりも小さい量だけ前記初期溶接設定電流から大きくした、または、小さくした値である請求項9記載の溶接制御方法。
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EP10755566.6A EP2338627B1 (en) | 2009-03-23 | 2010-02-18 | Method of controlling welding |
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US10734918B2 (en) | 2015-12-28 | 2020-08-04 | Illinois Tool Works Inc. | Systems and methods for efficient provision of arc welding power source |
CN106425026B (zh) * | 2016-11-30 | 2018-02-27 | 唐山松下产业机器有限公司 | 电弧焊接设备、电弧焊接控制方法及装置 |
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CN109317786B (zh) * | 2018-12-14 | 2020-08-21 | 唐山松下产业机器有限公司 | 短路过渡焊接控制方法 |
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JPS60127078A (ja) * | 1983-12-12 | 1985-07-06 | Daihen Corp | 溶接機制御装置 |
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CN102271855B (zh) | 2013-12-11 |
JPWO2010109759A1 (ja) | 2012-09-27 |
US8859936B2 (en) | 2014-10-14 |
CN102271855A (zh) | 2011-12-07 |
EP2338627B1 (en) | 2018-02-14 |
US20120000895A1 (en) | 2012-01-05 |
JP5187439B2 (ja) | 2013-04-24 |
EP2338627A1 (en) | 2011-06-29 |
EP2338627A4 (en) | 2015-03-11 |
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