Power supply device for thermal processing

Abstract

To provide a power supply device for thermal processing for displaying that makes it possible to intuitively understand a state of setting or a state of progressing.SOLUTION: A welding power supply device A1 includes: a power conversion unit 1 that converts input power into power for thermal processing; a control unit 2 that controls the power conversion unit 1; and a light-emitting display unit 4 having a plurality of light-emitting units 41-44. The control unit 2 includes: ratio detection units (a setting ratio detection unit 23, a rewriting ratio detection unit 24) each of which detects a ratio; and a light emission control unit 25 that causes the plurality of light-emitting units 41-44 to emit light by changing a number of thereof according to the ratio.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a power supply device for thermal processing. [Background technology]

[0002] Conventionally, there is known a power supply device for thermal processing that generates an arc between the tip of a torch electrode and a workpiece to perform thermal processing such as welding or cutting of the workpiece. For example, a welding power supply device for welding is provided with a display unit for displaying welding conditions and the like. A liquid crystal display or a 7-segment LED is used for the display unit of the welding power supply device. Patent Document 1 discloses a welding machine equipped with an LED display and a liquid crystal display. The welding machine displays text information corresponding to the display content of the LED display by switching the liquid crystal display from an off state to a lit or blinking state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-93841 A Summary of the Invention [Problem to be solved by the invention]

[0004] When setting welding conditions, the currently set parameter values ​​are displayed on the display unit, and the operator changes the set values ​​by operating the operation unit while viewing the values ​​displayed on the display unit. The welding power supply also stores control software. The control software is rewritten for version upgrades and the like. At this time, the progress of the software rewriting is displayed on the display unit as a numerical value, such as a percentage, indicating the rewritten ratio. However, it is difficult to intuitively understand the setting status when setting welding conditions and the progress of the software rewriting if they are only displayed as numerical values.

[0005] The present invention was devised in light of the above-mentioned circumstances, and has as its object to provide a power supply device for thermal processing that displays settings or progress in a manner that allows intuitive understanding. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides the following technical solutions.

[0007] The thermal processing power supply device of the present invention comprises a power conversion unit that converts input power into power for thermal processing, a control unit that controls the power conversion unit, and an light-emitting display unit having a plurality of light-emitting elements, and the control unit comprises a ratio detection unit that detects a ratio, and a light-emitting control unit that causes the plurality of light-emitting elements to emit light in different numbers depending on the ratio.

[0008] In a preferred embodiment of the present invention, the apparatus further comprises a storage unit for storing control software, and the ratio detection unit detects the ratio of the software that has been rewritten when the software is rewritten.

[0009] In a preferred embodiment of the present invention, the apparatus further comprises an operation unit that is operated by an operator to change a set value of a parameter, and the ratio detection unit detects the ratio of the set value of the parameter to a maximum value.

[0010] In a preferred embodiment of the present invention, the multiple light-emitting units are arranged in a row, and the light-emitting control unit increases the number of the multiple light-emitting units that are activated as the ratio increases, and activates the light-emitting units in sequence starting from the light-emitting unit located at one end.

[0011] In a preferred embodiment of the present invention, the light emission control unit changes the light emission color and / or lighting and blinking of the plurality of light emitting units according to the ratio or a processing state of the control unit. Effect of the Invention

[0012] According to the present invention, the light-emitting control unit causes the number of light-emitting parts to vary depending on the ratio. The operator can intuitively understand the current ratio based on the number of light-emitting parts of the light-emitting display unit that are emitting light. In this way, the thermal processing power supply device according to the present invention is capable of displaying settings or progress in an intuitive manner.

[0013] Other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0014] [Figure 1] 1A and 1B are diagrams for explaining a welding power supply according to a first embodiment, in which FIG. 1A is a block diagram showing the overall configuration of a welding system including the welding power supply, and FIG. 1B is a front view showing the welding power supply. [Diagram 2] 4A and 4B are diagrams illustrating a light emitting state of a light emitting unit. [Diagram 3] 13 is an example of a flowchart showing a rewrite ratio display process. [Figure 4] 13 is an example of a flowchart illustrating a setting ratio display process. [Diagram 5] FIG. 11 is a front view showing a welding power supply according to a second embodiment. [Figure 6] FIG. 11 is a front view showing a welding power supply according to a third embodiment. [Figure 7] FIG. 13 is a front view showing a welding power supply according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings, taking as an example a case in which a thermal processing power supply device according to the present invention is a welding power supply device.

[0016] [First embodiment] Fig. 1 is a diagram for explaining a welding power supply A1 according to a first embodiment. Fig. 1(a) is a block diagram showing the overall configuration of a welding system including welding power supply A1. Fig. 1(b) is a front view showing welding power supply A1.

[0017] The welding system shown in FIG. 1 includes a welding power supply A1, power cables C1 and C2, a wire feeder D, and a welding torch T.

[0018] One output terminal of the welding power supply A1 is conductively connected to the welding torch T via a power cable C1. The wire feeder D feeds the welding wire to the welding torch T, causing the tip of the welding wire to protrude from the tip of the welding torch T. The power cable C1 and the welding wire are electrically connected to a contact tip disposed at the tip of the welding torch T. The other output terminal of the welding power supply A1 is conductively connected to the workpiece W via a power cable C2. The welding power supply A1 generates an arc between the tip of the welding wire protruding from the tip of the welding torch T and the workpiece W, and supplies power to the arc. The welding system welds the workpiece W by the heat of the arc. The configuration of the welding system is not limited. For example, the welding system may not include the wire feeder D, and may use a non-consumable electrode instead of the welding wire.

[0019] Welding power supply A1 supplies DC power for arc welding to welding torch T. Welding power supply A1 includes a power conversion unit 1, a control unit 2, an operation unit 3, a light emitting display unit 4, a communication unit 5, a memory unit 6, a current sensor 7, and a housing 9.

[0020] The housing 9 houses the power conversion unit 1, the control unit 2, and the like. In this embodiment, as shown in FIG. 1(b), the housing 9 has a first surface 91 facing the front side, a second surface 92 connected to the first surface 91 and the left side surface, a third surface 93 connected to the first surface 91 and the right side surface, and a fourth surface 94 connected to the first surface 91 and the top surface. The shape of the housing 9 is not limited. In this embodiment, an operation panel 95 is arranged on the fourth surface 94. The operation panel 95 is arranged with operation means such as operation buttons (not shown) and display means such as a liquid crystal display (not shown). An operator operates the operation means while looking at the display means to perform various settings. In this embodiment, the light emitting units 41 to 44 described later are arranged on the first surface 91, the second surface 92, and the third surface 93.

[0021] The power conversion unit 1 converts AC power input from, for example, a commercial power source into DC power suitable for welding and outputs the power. For example, the power conversion unit 1 includes a primary rectifier circuit, an inverter circuit, a transformer, and a secondary rectifier circuit, all of which are not shown. The primary rectifier circuit converts AC power into DC power and outputs the DC power. The inverter circuit converts the DC power output from the primary rectifier circuit into high-frequency AC power. The high-frequency AC power is input to the secondary rectifier circuit via a transformer. The secondary rectifier circuit converts the high-frequency AC power into DC power and outputs the DC power. The configuration of the power conversion unit 1 is not limited to that described above.

[0022] Current sensor 7 detects the output current of welding power supply A1. In this embodiment, current sensor 7 is disposed on a connection line between one output terminal of power conversion unit 1 and an output terminal to which power cable C2 is connected. The location of current sensor 7 is not limited. Current sensor 7 outputs a current detection signal corresponding to the output current to control unit 2.

[0023] The operation unit 3 includes operation means such as an operation button and an operation dial, and outputs operation of the operation means by an operator as an operation signal to the control unit 2. Note that the type and number of operation means included in the operation unit 3 are not limited.

[0024] The communication unit 5 communicates via a communication network (not shown). The communication unit 5 outputs received information to the control unit 2 and transmits information input from the control unit 2. The communication method may be wired communication or wireless communication. In this embodiment, the communication unit 5 receives update software for upgrading the version of the control software from a server (not shown) and outputs the update software to the control unit 2.

[0025] The storage unit 6 stores various information such as control software, etc. The storage unit 6 stores, rewrites, and reads information in response to commands from the control unit 2.

[0026] The light-emitting display unit 4 displays information by emitting light in response to a command from the control unit 2. The light-emitting display unit 4 includes four light-emitting units 41, 42, 43, and 44, and a drive circuit (not shown). The drive circuit amplifies a command signal from the control unit 2 and outputs it to each of the light-emitting units 41, 42, 43, and 44, causing each of the light-emitting units 41, 42, 43, and 44 to emit light individually.

[0027] As shown in FIG. 1(b), the light-emitting units 41, 42, 43, and 44 are disposed below the operation panel 95 of the housing 9, and are arranged in a row from the left to the right when the housing 9 is viewed from the front. The light-emitting unit 41 is disposed near the upper end of the second surface 92. The light-emitting unit 42 is disposed across the upper end of the second surface 92 and the upper end of the first surface 91. The light-emitting unit 43 is disposed across the upper end of the first surface 91 and the upper end of the third surface 93. The light-emitting unit 44 is disposed near the upper end of the third surface 93. The light-emitting units 41, 42, 43, and 44 each have a rectangular shape that is long in the horizontal direction, and as a whole, form a single linear light-emitting body that extends from the second surface 92 through the first surface 91 to the third surface 93. Hereinafter, the light-emitting units 41, 42, 43, and 44 may be referred to as a "light bar" as if they were a single linear light-emitting body. Each of the light-emitting units 41, 42, 43, and 44 includes a plurality of light-emitting diodes with different light-emitting colors, and is configured to emit light in a plurality of colors by adjusting the light intensity of each light-emitting diode. In this embodiment, each of the light-emitting units 41, 42, 43, and 44 can emit green, yellow, red, and white light, respectively, and can light up and blink in each color. The colors of light emitted by the light-emitting units 41, 42, 43, and 44 are not limited. The shapes, arrangement directions, and arrangement positions of the light-emitting units 41, 42, 43, and 44 are not limited. The number of light-emitting units included in the light-emitting display unit 4 is not limited.

[0028] The control unit 2 controls the welding power supply A1 and is realized by, for example, a microcomputer. The control unit 2 controls the inverter circuit of the power conversion unit 1 so that the output current of the welding power supply A1 becomes the set current. The control unit 2 also performs a predetermined process in response to an operation signal input from the operation unit 3. When update software is input from the communication unit 5, the control unit 2 rewrites the software stored in the memory unit 6. The control unit 2 also controls the display of information on the light-emitting display unit 4 and the like. The control unit 2 has, as its functional configuration, a set value setting unit 21, a current control unit 22, a setting ratio detection unit 23, a rewrite ratio detection unit 24, and a light-emitting control unit 25.

[0029] Current control unit 22 is a functional component for controlling the output current of welding power supply A1. Current control unit 22 feedback-controls the output current of welding power supply A1 based on a current detection signal input from current sensor 7. Specifically, current control unit 22 generates a drive signal based on the difference between a current value corresponding to the current detection signal and a current command value input from set value setting unit 21, and outputs the drive signal to power conversion unit 1. Power conversion unit 1 controls the output current to the current command value by turning on and off each switching element of the inverter circuit based on the input drive signal.

[0030] The set value setting unit 21 is a functional configuration for setting a set value. The operator sets the set value of each parameter of the welding condition by operating the operation means of the operation unit 3. The set value setting unit 21 changes the set value of the parameter according to the operation signal input from the operation unit 3. The set value of the parameter being set is displayed on the display means of the operation panel 95. The operator changes the set value to a desired value by operating the operation means while looking at the set value displayed on the display means. The set value setting unit 21 outputs the set value of the parameter being set to the setting ratio detection unit 23. The parameters of the welding condition include the welding current, the welding voltage, and the wire feed speed. The set value setting unit 21 switches the target parameter according to the operation signal input from the operation unit 3. The set value setting unit 21 outputs the set value of the welding current to the current control unit 22 as a current command value.

[0031] The set ratio detection unit 23 detects a set ratio, which is the ratio of the set value of a parameter input from the set value setting unit 21 to the maximum value of the parameter. The maximum value of each parameter of the welding conditions is set in advance. The set ratio detection unit 23 obtains the maximum value of the parameter corresponding to the set value input from the set value setting unit 21, and detects the set ratio by dividing the set value by the maximum value. The set ratio detection unit 23 outputs the detected set ratio to the light emission control unit 25.

[0032] The rewrite ratio detection unit 24 detects the rewrite ratio, which is the ratio of the rewrite, when the software is rewritten. The software is transferred from the server via the communication unit 5. The entire file size of the software is obtained at the beginning of the transfer. The rewrite ratio detection unit 24 detects the rewrite ratio by dividing the transferred file size by the entire file size. The rewrite ratio detection unit 24 outputs the detected rewrite ratio to the light emission control unit 25.

[0033] The light-emitting control unit 25 controls the light-emitting display unit 4. The light-emitting control unit 25 outputs a command to the light-emitting display unit 4 to change the light-emitting states (light color, lighting, and blinking) of the light-emitting units 41, 42, 43, and 44 according to the processing state of the welding power supply A1. For example, the light-emitting control unit 25 commands the light-emitting display unit 4 to light up in green when the processing state is standby, to light up in yellow when inching, to blink white when no-load output is being performed, and to light up in white when welding is being performed. The light-emitting control unit 25 also commands the light-emitting display unit 4 to blink red when an abnormality is detected, and to blink yellow when a warning is being displayed. Note that the correspondence between each processing state and the light-emitting state is not limited to the above. In this way, by changing the light-emitting state according to the processing state of the welding power supply A1, the operator can easily know the processing state of the welding power supply A1.

[0034] Furthermore, during rewriting of the software and during setting of parameters of the welding conditions, the light-emitting control unit 25 controls the light-emitting display unit 4 to change the number of light-emitting elements 41, 42, 43, 44 that emit light. The light-emitting control unit 25 controls the light-emitting display unit 4 to increase the number of light-emitting elements 41, 42, 43, 44 that emit light as the setting ratio input from the setting ratio detection unit 23 or the rewrite ratio input from the rewrite ratio detection unit 24 increases.

[0035] In this embodiment, the light emission control unit 25 does not output a command signal to the light emitting display unit 4 when the input setting ratio or rewrite ratio (hereinafter, when there is no distinction, it will be described as "ratio") is less than 25%. Therefore, none of the light emitting units 41, 42, 43, 44 emit light. When the input ratio is 25% or more and less than 50%, the light emission control unit 25 outputs a command signal to the light emitting display unit 4 to make the light emitting unit 41 emit light. As a result, only the light emitting unit 41 emits light. FIG. 2 is a diagram showing the light emitting states of the light emitting units 41, 42, 43, 44. In FIG. 2, the light emitting units 41, 42, 43, 44 that are emitting light are hatched. When the ratio is 25% or more and less than 50%, only the light emitting unit 41 emits light, as shown in FIG. 2(a).

[0036] Furthermore, when the input ratio is 50% or more and less than 75%, the light-emitting control unit 25 outputs a command signal to the light-emitting display unit 4 to cause the light-emitting units 41 and 42 to emit light. This causes the light-emitting units 41 and 42 to emit light (see FIG. 2(b)). When the input ratio is 75% or more and less than 100%, the light-emitting control unit 25 outputs a command signal to the light-emitting display unit 4 to cause the light-emitting units 41, 42, and 43 to emit light. This causes the light-emitting units 41, 42, and 43 to emit light (see FIG. 2(c)). When the input ratio is 100%, the light-emitting control unit 25 outputs a command signal to the light-emitting display unit 4 to cause the light-emitting units 41, 42, 43, and 44 to emit light. This causes all of the light-emitting units 41, 42, 43, and 44 to emit light (see FIG. 2(d)).

[0037] As described above, the light-emitting portions 41, 42, 43, and 44 are each a rectangular shape that is long in the horizontal direction, and are arranged in a row in this order, forming a "light bar" that is a single linear light-emitting body as a whole. Therefore, during software rewriting, the light-emitting portion of the light bar becomes longer as the rewriting ratio increases, so that the progress of the rewriting can be indicated. Also, during the setting of the parameters of the welding conditions, the light-emitting portion of the light bar becomes longer as the setting ratio increases, so that the size of the setting value of the parameter being set can be indicated.

[0038] The light emission colors of the light-emitting elements 41, 42, 43, 44 during the rewriting of the software and during the setting of the parameters of the welding conditions are not limited. Furthermore, the light-emission control unit 25 may change the light emission color or may change between lighting and blinking according to the input ratio. Furthermore, the manner of these changes may be different during the rewriting of the software and during the setting of the parameters of the welding conditions. Furthermore, even during these processes, if an abnormality is detected, the light-emitting elements 41, 42, 43, 44 will switch to blinking red, and if a warning is displayed, they will switch to blinking yellow.

[0039] For example, the light-emitting control unit 25 may output a command signal to cause the light-emitting display unit 4 to flash in green when the input rewrite ratio is equal to or greater than 25% and less than 100%, and may output a command signal to cause the light-emitting display unit 4 to light in white when the input ratio is 100%. In this case, the worker can intuitively recognize that the software is being rewritten from the flashing green light, and can intuitively recognize the progress of the rewrite from the number of flashing light-emitting units 41, 42, 43, and 44 (the length of the light-emitting portion of the light bar). In addition, the worker can intuitively recognize that the software rewrite has been completed when all of the light-emitting units 41, 42, 43, and 44 have changed to lighting in white.

[0040] Furthermore, the light-emitting control unit 25 may output a command signal to light the light-emitting display unit 4 in green when the input set ratio is equal to or greater than 25% and less than 100%, and may output a command signal to light the light-emitting display unit 4 in red when the input ratio is 100%. In this case, the operator can intuitively recognize the size of the set value from the number of light-emitting units 41, 42, 43, 44 that are lit in green (the length of the light-emitting portion of the light bar), and can intuitively recognize that the upper limit of the set value has been reached and it cannot be increased any further when all of the light-emitting units 41, 42, 43, 44 are lit in red.

[0041] 3 is an example of a flowchart showing a rewrite ratio display process for displaying a rewrite ratio when rewriting software, which is performed by the control unit 2. The rewrite ratio display process is started when reception of the software for update begins.

[0042] First, the total file size of the software is acquired (S1). Specifically, the control unit 2 acquires the total file size included at the beginning of the software transferred from the server via the communication unit 5. Next, it is determined whether or not a write error has occurred (S2). If a write error has occurred (S2: YES), all of the light-emitting units 41, 42, 43, and 44 flash red to indicate the occurrence of a write error (S3), and the rewrite ratio display process ends. Specifically, the light-emitting control unit 25 outputs a command signal to the light-emitting display unit 4 to cause the light-emitting units 41, 42, 43, and 44 to flash red. If a write error has not occurred (S2: NO), the currently transferred file size is acquired (S4). Specifically, the control unit 2 acquires the file size of the software input from the communication unit 5. Next, the rewrite ratio is detected (S5). Specifically, the rewrite ratio detection unit 24 detects the rewrite ratio by dividing the transferred file size by the total file size.

[0043] Next, it is determined whether the rewrite ratio is 25% or more (S6). If it is less than 25% (S6: NO), none of the light-emitting units 41, 42, 43, 44 emit light, and the process returns to step S2. On the other hand, if it is 25% or more (S6: YES), the light-emitting unit 41 emits light (S7). Specifically, the light-emission control unit 25 outputs a command signal to the light-emitting display unit 4 to cause the light-emitting unit 41 to emit light. Next, it is determined whether the rewrite ratio is 50% or more (S8). If it is less than 50% (S8: NO), the process returns to step S2 with only the light-emitting unit 41 emitting light. On the other hand, if it is 50% or more (S8: YES), the light-emitting unit 42 emits light (S9). Specifically, the light-emission control unit 25 outputs a command signal to the light-emitting display unit 4 to cause the light-emitting unit 42 to emit light. Next, it is determined whether the rewrite ratio is 75% or more (S10). If it is less than 75% (S10: NO), the light-emitting units 41 and 42 are in the illuminated state and the process returns to step S2. On the other hand, if it is 75% or more (S10: YES), the light-emitting unit 43 emits light (S11). Specifically, the light-emitting control unit 25 outputs a command signal to the light-emitting display unit 4 to cause the light-emitting unit 43 to emit light.

[0044] Next, it is determined whether the transfer of the software is completed (S12). Specifically, the light emission control unit 25 determines whether the rewrite ratio detected by the rewrite ratio detection unit 24 is 100%. The control unit 2 may determine that the transfer of the software is completed when the input of the software from the communication unit 5 is completed. If the transfer is not completed (S12: NO), the process returns to step S2 with the light emitting units 41, 42, and 43 emitting light. On the other hand, if the transfer is completed (S12: YES), the light emitting unit 44 emits light (S13), and the rewrite ratio display process ends. Specifically, the light emission control unit 25 outputs a command signal to the light emitting display unit 4 to cause the light emitting unit 44 to emit light. Note that the process shown in the flowchart of FIG. 3 is an example, and the rewrite ratio display process performed by the control unit 2 is not limited to the above-mentioned one.

[0045] 4 is an example of a flowchart showing a set ratio display process for displaying the set ratios, which is performed by the control unit 2. The set ratio display process is started when a change in the setting of the welding condition parameters is started.

[0046] First, the maximum value of the parameter to be changed is obtained (S21). Specifically, the setting ratio detection unit 23 obtains the maximum value of the corresponding parameter. Next, the current setting value is obtained (S22). Specifically, the setting ratio detection unit 23 obtains the setting value input from the setting value setting unit 21. Next, the setting ratio is detected (S23). Specifically, the setting ratio detection unit 23 detects the setting ratio by dividing the current setting value by the maximum value of the parameter.

[0047] Steps S6 to S11 are the same as those in the flowchart shown in FIG. 3, and only the determination is made based on the set ratio instead of the rewrite ratio, so the description will be omitted. After step S9, it is determined whether the set ratio is 100% or not (S24). Specifically, the light emission control unit 25 determines whether the set ratio detected by the set ratio detection unit 23 is 100% or not. If the set ratio is not 100% (S24: NO), the light emission units 41, 42, and 43 are in a light-emitting state, and the process returns to step S22. On the other hand, if the set ratio is 100% (S24: YES), the light emission unit 44 is illuminated (S13), and the process returns to step S22 with the light emission units 41, 42, 43, and 44 in a light-emitting state. The set ratio display process is ended when the change in the setting of the welding condition parameters is ended. Note that the process shown in the flowchart of FIG. 4 is an example, and the set ratio display process performed by the control unit 2 is not limited to the above-mentioned one.

[0048] Next, the operation and effect of welding power supply A1 will be described.

[0049] According to this embodiment, light-emitting control unit 25 causes multiple light-emitting elements 41-44 to emit light in different numbers according to the setting ratio input from setting ratio detection unit 23 or the rewrite ratio input from rewrite ratio detection unit 24. The operator can intuitively understand the current ratio from the number of light-emitting elements 41-44 that are emitting light on light-emitting display unit 4. In this way, welding power supply A1 can provide a display that allows the operator to intuitively understand the setting status or progress status.

[0050] Also, according to this embodiment, the rewrite ratio detection unit 24 detects the rewrite ratio, which is the ratio of the rewrite, when the software is rewritten, and outputs it to the light emission control unit 25. The light emission control unit 25 causes the multiple light emitting units 41 to 44 to emit light in different numbers according to the input rewrite ratio. This allows the worker to intuitively understand the progress of the software rewrite. Also, according to this embodiment, the setting ratio detection unit 23 detects the setting ratio, which is the ratio of the parameter setting value to the maximum value, during the setting of the welding condition parameter, and outputs it to the light emission control unit 25. The light emission control unit 25 causes the multiple light emitting units 41 to 44 to emit light in different numbers according to the input setting ratio. This allows the worker to intuitively understand the magnitude of the setting value of the parameter being set.

[0051] According to this embodiment, the light-emitting units 41, 42, 43, and 44 are each a rectangular shape long in the horizontal direction, and are arranged in a row in this order, forming a "light bar" that is a single linear light-emitting body as a whole. The light-emitting control unit 25 controls the light-emitting display unit 4 so that the number of light-emitting units 41, 42, 43, and 44 that are made to emit light increases in order from the light-emitting unit 41 as the input ratio increases. Therefore, the light-emitting portion of the light bar becomes longer as the ratio increases. As a result, during software rewriting, the light-emitting portion of the light bar becomes longer as the rewriting ratio increases, so that the worker can more intuitively understand the progress of the rewriting. During parameter setting of the welding conditions, the light-emitting portion of the light bar becomes longer as the setting ratio increases, so that the worker can more intuitively understand the magnitude of the setting value of the parameter being set.

[0052] According to this embodiment, the light emission control unit 25 changes the light emission color of the light emitting units 41, 42, 43, and 44 according to the input ratio. For example, the light emission control unit 25 changes the light emission color to green when the input ratio is 25% or more and less than 100%, and changes the light emission color to white (or red) when the input ratio is 100%. In this case, the worker can intuitively recognize that the rewriting of the software is completed or that the upper limit of the set value has been reached and cannot be increased because the light emission units 41, 42, 43, and 44 have changed to white (or red). In this way, the worker can intuitively recognize that the ratio has become a special value because the light emission color has changed. According to this embodiment, if a writing error occurs during the rewriting of the software, the light emission control unit 25 causes the light emitting units 41, 42, 43, and 44 to flash red. This allows the worker to know that a writing error has occurred.

[0053] In the present embodiment, the light-emitting control unit 25 controls the light-emitting display unit 4 so that the number of light-emitting units 41, 42, 43, 44 that emit light increases as the input ratio increases, but this is not limited to the above. Conversely, the light-emitting control unit 25 may control the light-emitting display unit 4 so that the number of light-emitting units 41, 42, 43, 44 that emit light decreases as the input ratio increases.

[0054] In the present embodiment, the light-emitting units 41, 42, 43, and 44 can emit light in multiple colors, but this is not limited to the above. Each of the light-emitting units 41, 42, 43, and 44 may emit light in only one color. In this case, each of the light-emitting units 41, 42, 43, and 44 may include multiple light-emitting diodes that emit the same color, or may include only one light-emitting diode.

[0055] In the present embodiment, the light emitting units 41, 42, 43, and 44 each include a light emitting diode, but this is not limiting. Each of the light emitting units 41, 42, 43, and 44 may include a light emitting means other than a light emitting diode.

[0056] In addition, in the present embodiment, the case has been described where welding power supply A1 acquires update software via communication unit 5, but this is not limiting. Welding power supply A1 may acquire update software via a storage medium such as a USB memory.

[0057] In addition, in this embodiment, the case has been described where light-emitting display unit 4 displays the progress of software rewriting and the setting status of welding condition parameter values ​​by the number of light-emitting units 41, 42, 43, 44 that emit light, but this is not limited to this. Light-emitting display unit 4 may similarly display the progress of each process of welding power supply A1, the degree of sequence transition, etc.

[0058] In the present embodiment, the case where control unit 2 performs current control has been described, but the present invention is not limited to this. Control unit 2 may perform voltage control. In this case, control unit 2 generates a drive signal based on the difference between a voltage command value and a voltage value corresponding to a voltage detection signal that detects the output voltage of welding power supply A1.

[0059] In addition, in the present embodiment, the case where welding power supply A1 outputs DC power has been described, but this is not limited to this. Welding power supply A1 may further include an inverter between power conversion unit 1 and the output terminal to output AC power.

[0060] 5 to 7 show other embodiments of the present disclosure. In these figures, elements that are the same as or similar to those in the above embodiment are given the same reference numerals as in the above embodiment, and duplicated explanations will be omitted.

[0061] Second Embodiment 5 is a diagram for explaining a welding power supply A2 according to a second embodiment, and is a front view showing the welding power supply A2. The welding power supply A2 according to this embodiment differs from the welding power supply A1 according to the first embodiment in the number of light-emitting elements provided in light-emitting display unit 4. The configuration and operation of other parts of this embodiment are similar to those of the first embodiment.

[0062] In this embodiment, the light-emitting display unit 4 includes five light-emitting units 41, 42, 43, 44, and 45. The light-emitting units 41, 42, 43, 44, and 45 are disposed below the operation panel 95 of the housing 9, and are arranged in a row from left to right in this order when the housing 9 is viewed from the front. The light-emitting unit 41 is disposed near the upper end of the second surface 92. The light-emitting unit 42 is disposed across the upper end of the second surface 92 and the upper end of the first surface 91. The light-emitting unit 43 is disposed in the center in the left-right direction near the upper end of the first surface 91. The light-emitting unit 44 is disposed across the upper end of the first surface 91 and the upper end of the third surface 93. The light-emitting unit 45 is disposed near the upper end of the third surface 93. The light emitting portions 41, 42, 43, 44, and 45 each have a rectangular shape that is long in the horizontal direction, and as a whole form a single linear light emitting body that extends from the second surface 92 through the first surface 91 to the third surface 93.

[0063] In this embodiment, the light-emission control unit 25 does not cause any of the light-emitting units 41, 42, 43, 44, and 45 to emit light when the input ratio is less than 20%, and causes only the light-emitting unit 41 to emit light when the input ratio is 20% or more and less than 40%. The light-emission control unit 25 also causes the light-emitting units 41 and 42 to emit light when the input ratio is 40% or more and less than 60%, and causes the light-emitting units 41, 42, and 43 to emit light when the input ratio is 60% or more and less than 80%. The light-emission control unit 25 causes the light-emitting units 41, 42, 43, and 44 to emit light when the input ratio is 80% or more and less than 100%, and causes all of the light-emitting units 41, 42, 43, 44, and 45 to emit light when the input ratio is 100%.

[0064] In this embodiment, the same effects as in the first embodiment can be achieved. Furthermore, according to this embodiment, the light-emitting display unit 4 includes five light-emitting units 41, 42, 43, 44, and 45, so that the ratio can be displayed more precisely than in the first embodiment. As can be understood from this embodiment, the number of light-emitting units included in the light-emitting display unit 4 is not limited, and may be two or three, or may be six or more.

[0065] Third Embodiment 6 is a diagram for explaining welding power supply A3 according to the third embodiment, and is a front view showing welding power supply A3. Welding power supply A3 according to this embodiment differs from welding power supply A1 according to the first embodiment in that light-emitting units 41, 42, 43, 44 are all arranged on first surface 91. The configuration and operation of other parts of this embodiment are similar to those of the first embodiment.

[0066] In this embodiment, the light-emitting portions 41, 42, 43, and 44 are all disposed near the upper end of the first surface 91. The light-emitting portions 41, 42, 43, and 44 as a whole form a single linear light-emitting element extending in the left-right direction on the first surface 91.

[0067] In this embodiment, the same effect as in the first embodiment can be achieved. As can be understood from this embodiment, the positions at which the light-emitting units 41, 42, 43, and 44 are arranged are not limited. The light-emitting units 41, 42, 43, and 44 may be arranged near the lower end of the first surface 91, or near the center of the first surface 91 in the vertical direction. The light-emitting units 41, 42, 43, and 44 may also be arranged on the fourth surface 94, the upper surface of the housing 9, or a side surface of the housing 9. However, in consideration of the visibility of the operator, it is preferable to arrange them in a position visible from the front side of the housing 9.

[0068] [Fourth embodiment] 7 is a diagram for explaining a welding power supply A4 according to a fourth embodiment, and is a front view showing the welding power supply A4. The welding power supply A4 according to this embodiment differs from the welding power supply A1 according to the first embodiment in that light-emitting units 41, 42, 43, and 44 are arranged vertically side by side. The configuration and operation of other parts of this embodiment are similar to those of the first embodiment.

[0069] In this embodiment, the light-emitting sections 41, 42, 43, and 44 are arranged in a row from top to bottom in this order at the center in the left-right direction of the first surface 91. The light-emitting sections 41, 42, 43, and 44 each have a rectangular shape that is long in the up-down direction, and as a whole, form a single linear light-emitting body that extends in the up-down direction on the first surface 91.

[0070] This embodiment can also achieve the same effects as those of the first embodiment. As can be understood from the fourth embodiment, the direction in which the light emitting portions 41, 42, 43, and 44 are arranged is not limited.

[0071] In the first to fourth embodiments, the present invention has been described as being applied to a welding power supply device, but is not limited thereto. The present invention can also be applied to a power supply device for thermal processing for processing other than welding. For example, the present invention can be applied to a power supply device for thermal processing that supplies power to a plasma cutting system that generates plasma at the tip of a torch to cut a workpiece W, or an air arc gouging system that uses the heat of an arc generated at the tip of a torch and a jet of compressed air to dig a groove.

[0072] The thermal processing power supply device according to the present invention is not limited to the above-described embodiment, and the specific configuration of each part of the thermal processing power supply device according to the present invention can be freely designed in various ways. [Explanation of symbols]

[0073] A1 to A4: welding power supply device, 1: power conversion unit, 2: control unit, 23: setting ratio detection unit, 24: rewrite ratio detection unit, 25: light emission control unit, 3: operation unit, 4: light emission display unit, 6: storage unit

Claims

1. a power conversion unit that converts input power into power for thermal processing; A control unit that controls the power conversion unit; a light-emitting display unit having a plurality of light-emitting portions; Equipped with The control unit is A ratio detection unit that detects a ratio; a light emission control unit that causes the plurality of light emitting units to emit light in different numbers according to the ratio; Equipped with Power supply for thermal processing.

2. Further comprising a storage unit for storing control software, The ratio detection unit detects a ratio of the software rewritten when the software is rewritten.

2. The power supply device for thermal processing according to claim 1.

3. An operation unit that is operated by an operator to change a set value of the parameter is further provided, the ratio detection unit detects a ratio of the parameter to the maximum value of the setting value; 2. The power supply device for thermal processing according to claim 1.

4. The plurality of light emitting units are arranged in a line, the light emission control unit increases the number of the plurality of light emitting units that emit light as the ratio increases, and causes the light emitting units to emit light in order starting from the light emitting unit disposed at one end.

2. The power supply device for thermal processing according to claim 1.

5. the light emission control unit changes the light emission color and / or the lighting and blinking of the plurality of light emitting units according to the ratio or a processing state of the control unit.

5. The power supply device for thermal processing according to claim 1.

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