Arc welding equipment

Abstract

To easily finely adjust a recommended welding current value and a recommended welding voltage value output from a welding condition database in an arc welding device. [Solution] In an arc welding device that performs welding based on a recommended welding current value Isr and a recommended welding voltage value Vsr that are output from a predetermined welding condition database DB using at least the arc welding method, joint, plate thickness, and welding wire diameter as input, the device is equipped with a fine-tuning index setting unit BR that outputs a fine-tuning index Br based on input from a welding operator, and a recommended value fine-tuning unit BC that uses the fine-tuning index Br as input to correct and output the recommended welding current value Isr.

Description

[Technical Field]

[0001] The present invention relates to an arc welding device that allows welding conditions to be easily set. [Background technology]

[0002] Arc welding devices are used to feed a welding wire to weld steel, aluminum, and the like. For the arc welding device, it is necessary to set an appropriate welding current and welding voltage according to welding conditions such as the arc welding method, joint, plate thickness, and welding wire diameter. To facilitate the setting of these welding conditions, arc welding devices are used that have a built-in welding condition database that outputs recommended welding current and welding voltage values ​​when the arc welding method, joint, plate thickness, welding wire diameter, and the like are input (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6653424 Summary of the Invention [Problem to be solved by the invention]

[0004] When a welder manually welds using an arc welding device with a built-in welding conditions database, the recommended welding current and welding voltage values ​​output from the welding conditions database may not be optimal because welding conditions such as welding speed and distance between the power contact tip and the base material vary depending on the welder.However, with conventional arc welding devices, in order to fine-tune the recommended welding current and welding voltage values ​​output from the welding conditions database, it was necessary to perform complex operations on the welding conditions database.

[0005] Therefore, an object of the present invention is to provide an arc welding device that can easily finely adjust the recommended welding current value and recommended welding voltage value output from a welding condition database, for example. [Means for solving the problem]

[0006] An arc welding apparatus provided according to a first aspect of the present invention performs welding based on a recommended welding current value and a recommended welding voltage value output from a predetermined welding condition database using at least an arc welding method, a joint, a plate thickness, and a welding wire diameter as input, and is characterized by comprising: a fine-adjustment index setting unit that outputs a fine-adjustment index based on input by a welding operator; and a recommended value fine-adjustment unit that uses the fine-adjustment index as input to correct and output the recommended welding current value.

[0007] As an example, the arc welding device of the present invention is characterized in that the recommended value fine adjustment unit receives the fine adjustment index as an input, corrects the recommended welding voltage value instead of the recommended welding current value, and outputs the corrected value.

[0008] As an example, the arc welding device of the present invention further includes a fine-tuning selection unit that selects one of the recommended welding current value or the recommended welding voltage value as a target for fine-tuning based on input from the welding operator, and the recommended value fine-tuning unit uses the fine-tuning index as an input and corrects and outputs the recommended welding current value or the recommended welding voltage value selected by the fine-tuning selection unit.

[0009] As an example, in the arc welding device of the present invention, the fine adjustment selection unit can further select prohibition of fine adjustment based on an input from the welding operator, and when prohibition of fine adjustment is selected by the fine adjustment selection unit, the recommended value fine adjustment unit outputs the recommended welding current value or the recommended welding voltage value without modification regardless of the fine adjustment index.

[0010] The arc welding apparatus provided according to a second aspect of the present invention is characterized in that it further comprises a recommended value change command unit that, when operated by the welding operator, commands the welding operator to change the recommended value in the welding condition database to the corrected value of the recommended welding current or the recommended welding voltage output from the recommended value fine-tuning unit. [Effects of the Invention]

[0011] According to the above configuration, for example, with respect to an arc welding device, the recommended welding current value and the recommended welding voltage value output from the welding condition database can be easily fine-tuned, thereby making welding work more efficient. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a block diagram of an arc welding device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] 1 is a block diagram of an arc welding device according to an embodiment of the present invention, and each block will be described below with reference to the drawing.

[0015] The welding execution condition setting circuit WR is, for example, a touch panel provided on the front panel of the welding power source PS, and outputs the welding execution condition signal Wr when the welding operator selects at least the parameters of the arc welding method, joint, plate thickness, and welding wire diameter. For example, the parameters of the welding execution conditions are as follows: arc welding method: carbon dioxide arc welding, MAG arc welding, or pulse arc welding; joint: T-shaped fillet joint or lap fillet joint; plate thickness: 1 mm to 9 mm; welding wire diameter: 0.8 mm to 1.6 mm

[0016] The welding condition database circuit DB receives as input the above-mentioned welding execution condition signal Wr, a recommended value change command signal Oc (described later), a welding current setting signal Ir (described later), and a welding voltage setting signal Vr (described later), and outputs a recommended welding current value signal Isr from a welding condition database constructed in advance through experiments or the like, and outputs a recommended welding voltage value signal Vsr calculated using a predetermined unidimensional function with the recommended welding current value signal Isr as input, and when the recommended value change command signal Oc becomes high level for a short period of time, overwrites and saves the values ​​of the welding current setting signal Ir and the welding voltage setting signal Vr as recommended values ​​in the welding condition database.

[0017] The fine adjustment selection circuit BS is, for example, a touch panel provided on the front panel of the welding power source PS, and outputs the current fine adjustment mode, voltage fine adjustment mode, or fine adjustment prohibition mode selected by the welding operator as a fine adjustment selection signal Bs.

[0018] The fine adjustment index setting circuit BR is, for example, a touch panel provided on the front panel of the welding power source PS, and outputs a fine adjustment index signal Br, which is an integer in the range of -10 to +10, according to an input by the welding operator.

[0019] The recommended value fine adjustment circuit BC receives the above-mentioned recommended welding current value signal Isr, the above-mentioned recommended welding voltage value signal Vsr, the above-mentioned fine adjustment selection signal Bs, and the above-mentioned fine adjustment index signal Br as inputs, performs the following processing, and outputs the welding current setting signal Ir and the welding voltage setting signal Vr. (1) When the fine adjustment selection signal Bs is in the current fine adjustment mode The welding current setting signal Ir is calculated and output using the following formula: The welding current setting signal Ir is input, and the welding voltage setting signal Vr is calculated using a predetermined one-dimensional function and output. Ir = Isr × (1 + Br × 0.04) For example, when Br=-5, Ir is corrected to 80% of Isr, and when Br=+5, Ir is corrected to 120% of Isr. (2) When the fine adjustment selection signal Bs is in voltage fine adjustment mode The welding voltage setting signal Vr is calculated and output using the following formula: The welding current setting signal Ir is output as is, just like the welding current recommended value signal Isr. Vr = Vsr × (1 + Br × 0.04) For example, when Br=-5, Vr is corrected to 80% of Vsr, and when Br=+5, Vr is corrected to 120% of Vsr. (3) When the fine adjustment selection signal Bs is in the fine adjustment disabled mode Regardless of the value of the fine adjustment index signal Br, the recommended welding current signal Isr is output as is as the welding current setting signal Ir, and the recommended welding voltage signal Vsr is output as is as the welding voltage setting signal Vr.

[0020] The recommended value change command circuit OC is, for example, a touch panel provided on the front panel of the welding power source PS, and outputs a recommended value change command signal Oc that goes high for a short time when turned on by a welding operator.

[0021] The feed speed setting circuit FR receives the welding current setting signal Ir as an input and outputs a feed speed setting signal Fr corresponding to the value of the welding current setting signal Ir.

[0022] The welding power source PS receives the welding voltage setting signal Vr and the feed speed setting signal Fr as inputs, and a commercial AC power source (not shown) such as a three-phase 200V power source as input, performs output control such as inverter control based on the welding voltage setting signal Vr, and outputs a welding voltage Vw and a welding current Iw, and outputs a feed control signal Fc to the wire feeder WF based on the feed speed setting signal Fr. Since the welding power source PS is under constant voltage control, the welding voltage Vw is controlled to the value of the welding voltage setting signal Vr. The welding current Iw has a DC waveform, a pulse waveform, or an AC waveform depending on the arc welding method.

[0023] The feeder WF is equipped with a feed motor, and receives the above-mentioned feed control signal Fc as an input to feed the welding wire 1 through the welding torch 4 to the base material 2. The feed speed of the welding wire 1 is determined by the value of the above-mentioned feed speed setting signal Fr.

[0024] Welding torch 4 guides welding wire 1 to base material 2 and supplies power to welding wire 1 via a power feed tip (not shown).

[0025] A welding voltage Vw is applied between a welding wire 1 and a base material 2, a welding current Iw flows, and an arc 3 is generated.

[0026] The welding procedure when welding is performed using the arc welding apparatus according to this embodiment will be described below.

[0027] [When the fine adjustment selection signal Bs is in fine adjustment prohibited mode] 10) The welding operator selects the fine adjustment prohibition mode by the fine adjustment selection circuit BS. 11) When a welding operator inputs at least the parameters of the arc welding method, joint, plate thickness, and welding wire diameter into the welding execution condition setting circuit WR, a welding execution condition signal Wr is output. 12) The welding condition database circuit DB receives the welding execution condition signal Wr as an input and outputs a recommended welding current signal Isr from a welding condition database previously constructed through experiments, etc. Furthermore, the recommended welding current signal Isr is received as an input and a recommended welding voltage signal Vsr calculated by a predetermined unidimensional function is output. 13) Since the fine adjustment selection signal Bs is in the fine adjustment prohibited mode, the recommended value fine adjustment circuit BC outputs the above welding current recommended value signal Isr as is as the welding current setting signal Ir, and outputs the above welding voltage recommended value signal Vsr as is as the welding voltage setting signal Vr. 14) The feed speed setting circuit FR outputs a feed speed setting signal Fr corresponding to the value of the welding current setting signal Ir. 15) The welding wire 1 is fed by the feeder WF at the value of the above-mentioned feed speed setting signal Fr. The welding power source PS performs constant voltage control based on the value of the above-mentioned welding voltage setting signal Vr, and outputs the welding voltage Vw and welding current Iw. This performs test welding. If the weld quality of the test welding is good, the actual welding is carried out as is.

[0028] [When the fine adjustment selection signal Bs is in the current fine adjustment mode] 20) In the test welding in 15) above, the welding conditions, such as the welding speed and distance between the power contact tip and the base material, performed by the welder were different from the standard welding conditions assumed in the welding condition database, resulting in poor welding quality. Therefore, the welder selected the current fine adjustment mode using the fine adjustment selection circuit BS to make fine adjustments to increase the welding current Iw. 21) When the welding operator inputs +5 through the fine adjustment index setting circuit BR, the fine adjustment index signal Br=5 is output. 22) The recommended value fine-tuning circuit BC calculates Ir = Isr × (1 + Br × 0.04) = Isr × 1.2, and the value of the welding current setting signal Ir becomes the value obtained by increasing the value of the recommended welding current value signal Isr by 20%.The value of the welding voltage setting signal Vr becomes the value calculated by inputting the value of the welding current setting signal Ir into a predetermined one-dimensional function. 23) The feed speed setting circuit FR outputs a feed speed setting signal Fr corresponding to the value of the welding current setting signal Ir. 24) The welding wire 1 is fed by the feeder WF at the value of the finely adjusted feed speed setting signal Fr. The welding power source PS performs constant voltage control based on the value of the finely adjusted welding voltage setting signal Vr, and outputs the welding voltage Vw and welding current Iw. This allows test welding to be performed. If the test welding shows good welding quality, the actual welding is carried out as is. 25) When the welding operator turns on the recommended value change command circuit OC, the finely adjusted values ​​of the welding current setting signal Ir and the welding voltage setting signal Vr are overwritten and saved as recommended values ​​in the welding condition database built into the welding database circuit DB.

[0029] [When the fine adjustment selection signal Bs is in voltage fine adjustment mode] 30) In the test welding in 15) above, the welding conditions, such as the welding speed and distance between the power contact tip and the base material, performed by the welder were different from the standard welding conditions assumed in the welding condition database, resulting in poor welding quality. Therefore, the welder selected the voltage fine adjustment mode using the fine adjustment selection circuit BS to make fine adjustments to reduce the welding voltage Vw and shorten the arc length. 31) When the welding operator inputs -3 through the fine adjustment index setting circuit BR, the fine adjustment index signal Br=-3 is output. 32) The recommended value fine-tuning circuit BC calculates Vr = Vsr × (1 + Br × 0.04) = Vsr × 0.88, and the value of the welding voltage setting signal Vr becomes the value obtained by reducing the value of the recommended welding voltage signal Vsr by 12%. On the other hand, the value of the welding current setting signal Ir remains the same as the value of the recommended welding current signal Isr. 33) The feed speed setting circuit FR outputs a feed speed setting signal Fr corresponding to the value of the welding current setting signal Ir. 34) The welding wire 1 is fed by the feeder WF at the value of the above-mentioned feed speed setting signal Fr. The welding power source PS performs constant voltage control based on the value of the above-mentioned finely adjusted welding voltage setting signal Vr, and outputs the welding voltage Vw and welding current Iw. This performs test welding. If the weld quality of the test welding is good, the actual welding is carried out as is. 35) When the welding operator turns on the recommended value change command circuit OC, the values ​​of the welding current setting signal Ir and the finely adjusted welding voltage setting signal Vr are overwritten and saved as recommended values ​​in the welding condition database built into the welding database circuit DB.

[0030] The effects of this embodiment are described below. According to this embodiment, an arc welding apparatus performs welding based on a recommended welding current and a recommended welding voltage output from a predetermined welding condition database, which uses at least the arc welding method, joint, plate thickness, and welding wire diameter as input. The apparatus includes a fine-adjustment index setting unit that outputs a fine-adjustment index based on input from a welding operator, and a recommended value fine-adjustment unit that modifies and outputs the recommended welding current using the fine-adjustment index as input. When test welding is performed based on the recommended welding current and recommended welding voltage output from the welding condition database, poor welding quality is observed, making it necessary to fine-adjust the welding conditions. In this embodiment, the welding operator can easily increase or decrease the recommended welding current simply by inputting the recommended welding current and voltage into the fine-adjustment index setting unit provided on the front panel of the welding power source. This allows the welding conditions to be optimized, resulting in good welding quality.

[0031] More preferably, according to this embodiment, the recommended value fine-adjustment unit inputs the fine-adjustment index and corrects and outputs the recommended welding voltage instead of the recommended welding current. When test welding is performed based on the recommended welding current and recommended welding voltage values ​​output from the welding condition database, the welding conditions must be fine-adjusted because the welding quality is poor. In this embodiment, the welding operator can easily increase or decrease the recommended welding voltage simply by inputting the fine-adjustment index into a fine-adjustment index setting unit provided on the front panel of the welding power source, for example. As a result, the welding conditions can be optimized, resulting in good welding quality.

[0032] More preferably, according to this embodiment, the welding apparatus further includes a fine-tuning selection unit that selects one of the recommended welding current value and the recommended welding voltage value as the target for fine adjustment based on input from the welding operator, and the recommended value fine-tuning unit modifies and outputs the recommended welding current value or the recommended welding voltage value selected by the fine-tuning selection unit using the fine-tuning index as input. In this embodiment, the welding operator can easily select whether the recommended welding current value or the recommended welding voltage value is the target for fine adjustment. This allows the welding current or the welding voltage to be optimized depending on the welding result, thereby achieving good welding quality.

[0033] More preferably, according to this embodiment, the fine-tuning selection unit can further select prohibition of fine-tuning based on an input from the welding operator, and when prohibition of fine-tuning is selected by the fine-tuning selection unit, the recommended value fine-tuning unit outputs the recommended welding current value or the recommended welding voltage value without modifying it regardless of the fine-tuning index. In this way, even if the fine-tuning index is inadvertently changed, fine-tuning of the welding conditions is prohibited, thereby preventing unexpected deterioration of welding quality.

[0034] More preferably, according to this embodiment, the welding apparatus further includes a recommended value change command unit that, when operated by a welding operator, commands the welding operator to change the recommended value in the welding condition database to the corrected value of the recommended welding current or the recommended welding voltage output from the recommended value fine-adjustment unit. In this way, when the recommended welding current or the recommended welding voltage is fine-adjusted, the fine-adjusted value can be changed as the recommended value in the welding condition database. As a result, setting of welding conditions can be made easier. [Explanation of symbols]

[0035] 1: Welding wire, 2: Base metal, 3: Arc, 4: Welding torch, BC: Recommended value fine adjustment circuit, BR: Fine adjustment index setting circuit, Br: Fine adjustment index signal, BS: Fine adjustment selection circuit, Bs: Fine adjustment selection signal, DB: Welding condition database circuit, Fc: Feed control signal, FR: Feed speed setting circuit, Fr: Feed speed setting signal, Isr: Recommended welding current signal, Ir: Welding current setting signal, Iw: Welding current, OC: Recommended value change command circuit, Oc: Recommended value change command signal, PS: Welding power source, Vsr: Recommended welding voltage signal, Vr: Welding voltage setting signal, Vw: Welding voltage, WF: Wire feeder, WR: Welding operation condition setting circuit, Wr

Claims

1. An arc welding device that performs welding based on a recommended welding current value and a recommended welding voltage value that are output from a predetermined welding condition database using at least an arc welding method, a joint, a plate thickness, and a welding wire diameter as inputs, 1. An arc welding device comprising: a fine adjustment index setting unit that outputs a fine adjustment index based on an input by a welding operator; and a recommended value fine adjustment unit that uses the fine adjustment index as an input to correct and output the recommended welding current value.

2. 2. The arc welding device according to claim 1, wherein the recommended value fine adjustment unit receives the fine adjustment index as an input, corrects the recommended welding voltage value instead of the recommended welding current value, and outputs the corrected value.

3. 3. The arc welding device according to claim 1, further comprising a fine-tuning selection unit that selects one of the recommended welding current value and the recommended welding voltage value as a target for fine adjustment based on an input from the welding operator, wherein the recommended value fine-tuning unit uses the fine-tuning index as an input to correct and output the recommended welding current value or the recommended welding voltage value selected by the fine-tuning selection unit.

4. 4. The arc welding device according to claim 3, wherein the fine-tuning selection unit can further select prohibition of fine-tuning based on an input from the welding operator, and when prohibition of fine-tuning is selected by the fine-tuning selection unit, the recommended value fine-tuning unit outputs the recommended welding current value or the recommended welding voltage value without modifying it regardless of the fine-tuning index.

5. 4. The arc welding device according to claim 3, further comprising a recommended value change command unit that, when operated by the welding operator, commands the welding operator to change the recommended value in the welding condition database to the corrected value of the recommended welding current or the recommended welding voltage output from the recommended value fine adjustment unit.

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