KR102336583B1 - Welding speed and arc stability measurement system - Google Patents

Abstract

The present invention relates to a welding speed and arc stability measurement system. A welding speed and arc stability measurement system according to an embodiment of the present invention comprises: a welding torch for welding a base material; a sensor unit which includes a current sensor for detecting the current of the welding torch, a voltage sensor for detecting a voltage of the welding torch, and a position sensor for detecting a position of the welding torch, and is embedded in the welding torch; and a server which receives information detected by the sensor unit and calculates data. The server includes: a data recognition unit which includes a position recognition unit for receiving information detected by the sensor unit in real time, collecting information on the welding torch, and recognizing information transmitted from the position sensor, a voltage recognition unit for recognizing information transmitted from the voltage sensor, and a current recognition unit for recognizing information transmitted from the current sensor; a welding determination unit which detects the current from the current sensor to determine the presence of welding; a welding speed measurement unit which measures the speed at which the welding torch welds the base material; and a data calculation unit which calculates the distribution of current and voltage when the welding torch performs welding based on the information collected from the data recognition unit. Therefore, arc stability can be confirmed in a ratio using the welding current and the welding voltage.

Description

Welding speed and arc stability measurement system

The present invention relates to a system for measuring welding speed and arc stability. More particularly, it relates to a measurement system for welding speed and arc stability for collecting and calculating welding data to measure welding arc and weld quality stability.

In the welding industry, welding processes such as shipbuilding, automobile, construction, and electronics greatly affect product quality, productivity, and manufacturing cost. is becoming the mainstream.

In general, the welding monitoring system predicts, evaluates, and manages the quality of the welded part through real-time measurement and result analysis using various sensors suitable for each welding process in order to secure good welding quality in the welding process, and to confirm and properly cook in real time. means system.

When a product is produced using an industrial welding robot, the importance of automatic quality inspection, that is, quality monitoring, is being emphasized because the operator cannot directly monitor the welding quality on site.

In manual welding or semi-automatic welding fixing, it can be seen that the welding quality is determined by the function of the operator and the performance of the welding machine, so it is difficult to continuously obtain the required quality without evaluating the worker's skill level and the accurate performance of the welding machine.

In addition, it is possible to solve difficulties such as setting conditions according to the welding process, checking welding status, checking defect trends and types, storing and statistical processing of welding data, and identifying causes of defects.

Republic of Korea Patent Publication No. 10-2015-0096051

It is an object of the present invention to provide a system for measuring welding speed and arc stability for measuring welding arc and welding quality stability by collecting and calculating welding data.

In order to solve the above problem,

A system for measuring welding speed and arc stability according to an embodiment of the present invention includes a welding torch for welding a base material;

a current sensor for detecting the current of the welding torch, a voltage sensor for detecting the voltage of the welding torch, and a position sensor for detecting the position of the welding torch, a sensor unit built in the welding torch; and

a server receiving the information sensed by the sensor unit and calculating data; includes,

The server receives the information sensed by the sensor unit in real time, collects information of the welding torch, and a position recognition unit for recognizing information transmitted from the position sensor, and a voltage for recognizing information transmitted from the voltage sensor A data recognition unit comprising a recognition unit and a current recognition unit for recognizing information transmitted from the current sensor;

a welding determination unit that detects a current from the current sensor and determines whether welding is present;

a welding speed measuring unit for measuring the speed at which the welding torch welds the base material;

a data calculation unit for calculating a distribution of current and voltage when the welding torch is welded on the basis of the information collected from the data recognition unit; may include

In addition, in the system for measuring welding speed and arc stability according to an embodiment of the present invention, the welding determination unit determines whether or not a current is sensed in the current recognition unit to determine whether the welding is performed by the welding torch,

When the welding determination unit determines that the welding torch is performing welding, a welding start time and a welding end time may be calculated, respectively.

In addition, in the system for measuring welding speed and arc stability according to an embodiment of the present invention, the position recognition unit may include: a movement distance measuring unit for measuring a distance traveled by the welding torch while the welding torch is welding on a base material; and

a required time measuring unit for measuring the welding time required for the moving distance of the welding torch measured by the moving distance measuring unit; may include

In addition, in the welding speed and arc stability measurement system according to an embodiment of the present invention, the voltage recognition unit, when the welding torch performs welding, an average voltage measurement unit for calculating an average voltage;

a maximum voltage measuring unit for calculating a maximum voltage when the welding torch performs welding; and

a minimum voltage measuring unit for calculating a minimum voltage when the welding torch performs welding; may include

In addition, in the welding speed and arc stability measurement system according to an embodiment of the present invention, the current recognition unit, when the welding torch performs welding, an average current measurement unit for calculating an average current;

a maximum current measuring unit for calculating a maximum current when the welding torch performs welding; and

a minimum current measurement unit for calculating a minimum current when the welding torch performs welding; may include

In addition, in the system for measuring welding speed and arc stability according to an embodiment of the present invention, when the welding determination unit determines that the welding torch performs welding, welding speed measurement for measuring the welding speed of the welding torch wealth; further comprising,

The welding speed measuring unit may measure an average speed, a maximum speed, and a minimum speed when the welding torch performs welding.

In addition, in the measurement system for welding speed and arc stability according to an embodiment of the present invention, the data calculator includes: a current distribution calculator for calculating a current distribution by receiving one or more current values calculated by the current recognition unit;

a voltage distribution calculating unit receiving one or more voltage values calculated by the voltage recognition unit and calculating a voltage distribution diagram;

a reference setting unit for presetting a current reference value and a voltage reference value; and

an effective range setting unit for setting a floating range of a current value and a voltage value based on the current and voltage values set by the reference setting unit; may include

In addition, in the system for measuring welding speed and arc stability according to an embodiment of the present invention, the data calculation unit matches one or more current distribution diagrams calculated by the current distribution calculation unit to the effective range set by the effective range setting unit and the effective value of the welding current can be calculated.

In addition, in the system for measuring welding speed and arc stability according to an embodiment of the present invention, the data calculation unit matches one or more voltage distribution diagrams calculated by the voltage distribution calculation unit to the effective range set by the effective range setting unit and the effective value of the welding voltage can be calculated.

These solutions will become more apparent from the following detailed description of the invention based on the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims should not be construed in their ordinary and dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it is possible.

That is, according to an embodiment of the present invention, the presence or absence of welding, the welding speed, and the moving speed of the welding torch can be calculated based on the current, voltage, and position and speed data sensed by the welding torch, and more specifically, welding Arc stability can be checked as a ratio using current and welding voltage, and the probability of deviation of welding current and welding voltage can be measured.

In addition, according to an embodiment of the present invention, it can be used as one evaluation index capable of evaluating the stability of the welding arc, penetration, and welding quality.

1 is an exemplary view showing the use of a welding speed and arc stability measurement system according to an embodiment of the present invention.
2 is a block diagram illustrating a sensor unit of a system for measuring welding speed and arc stability according to an embodiment of the present invention.
3 is a block diagram illustrating a server of a system for measuring welding speed and arc stability according to an embodiment of the present invention.
4 is a block diagram illustrating a data recognition unit of a system for measuring welding speed and arc stability according to an embodiment of the present invention.
5 is a graph showing the calculation of effective current and voltage values of the welding speed and arc stability measurement system according to an embodiment of the present invention.

The specific aspects and specific technical features of the present invention will become more apparent from the following detailed description and embodiments in conjunction with the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When a component is described as being “connected”, “coupled” or “connected” to another component, the component may be directly connected to or connected to the other component, but another component is between each component. It should be understood that elements may also be “connected,” “coupled,” or “connected.”

Hereinafter, an embodiment of the present invention will be described in detail based on the accompanying drawings.

As shown in Figure 1, the welding speed and arc stability measurement system according to an embodiment of the present invention is installed inside the welding torch 100 and the welding torch 100 for welding the base material, the welding torch ( The sensor unit 200 for detecting the position, current and voltage of 100), and the server 300 that receives information sensed from the sensor unit 200 and collects and calculates information generated while the welding torch 100 is welded. includes

As shown in FIG. 2 , the sensor unit 200 includes a current sensor 230 for detecting a current generated from the welding torch 100 and a voltage sensor 220 for detecting a voltage generated from the welding torch 100 . and a position sensor 210 for detecting the position of the welding torch 100, and the position sensor 210 may include a gyro sensor to easily measure the position and speed, but is limited thereto no.

As shown in FIG. 3 , the server 300 receives information detected by the sensor unit 200 (current, voltage, and position sensed from the welding torch) and the welding torch 100 performs welding. can collect and calculate information generated while performing, specifically, a data recognition unit 310 that receives and recognizes data from the sensor unit 200 , and a welding determination unit that determines whether the welding torch 100 is welded or not. (350), and a welding speed measuring unit 360 for measuring the welding speed of the welding torch 100, calculating the current and voltage distribution of the welding torch 100, and calculating the effective values of the welding voltage and the welding current It may include a data calculator 370 .

The data recognition unit 310 receives information detected by the sensor unit 200 installed in the welding torch 100 and collects information while the welding torch 100 performs welding, specifically, as shown in FIG. As shown, the current recognition unit 340 for recognizing the current value of the welding torch 100 , the voltage recognition unit 330 for recognizing the voltage value of the welding torch 100 , and the position of the welding torch 100 are recognized and a position recognition unit 320 to

Also, the data recognition unit 310 may have a near field communication installed inside the server 300 so that two-way communication with the sensor unit can be performed in real time. In order to transmit information detected by the sensor unit 200 to the server 300 even in the welding torch 100 , a separate communication device may be installed inside the welding torch 100 or inside the sensor unit 200 .

The welding determination unit 350 performs a function of determining whether the welding torch 100 performs welding, and specifically detects whether a current flows in the welding torch 100 in the current recognition unit 340 . and the point at which the current flows in the welding torch 100 is determined as the point at which the welding torch 100 starts welding, and the point at which the current flow in the welding torch 100 disappears is the point at which the welding torch 100 ends the welding. point can be judged. Such determination may be determined by the start time measurement unit 351 and the end time measurement unit 352 included in the welding determination unit 350 , respectively.

The start time measurement unit 351 and the end time measurement unit 352 detect the current in the welding determination unit 350 and determine that the welding torch 100 is performing welding, respectively, the welding start time and the welding end time. can be calculated.

In addition, when the welding determination unit 350 determines that the welding torch 100 is performing welding, the welding torch 100 in the position recognizing unit 320 , the voltage recognizing unit 330 , and the current recognizing unit 340 , respectively. ) can measure the current, voltage and moving distance used.

Specifically, the position recognition unit 320 is a moving distance measuring unit 321 and a moving distance measuring unit 321 for measuring the distance traveled by the welding torch 100 while welding the welding torch 100 to the base material. It may include a required time measuring unit 322 for measuring the required welding time with respect to the measured moving distance of the welding torch.

That is, the position recognition unit 320 measures, for example, with reference to FIG. 1 , assuming that the welding torch 100 performs welding from point A to point B, measuring the distance moved from point A to point B. It is measured through the unit 321 and the time taken for welding from the point A to the point B may be measured through the required time measuring unit 322 .

The voltage recognition unit 330 includes an average voltage measurement unit 331 , a maximum voltage measurement unit 332 , and a minimum voltage measurement unit 333 , and when the welding torch 100 performs welding to the base material, the average voltage , the maximum voltage and the minimum voltage can be calculated, respectively. The above-described voltage is a data value required when the data calculating unit 370, which will be described later, calculates the voltage distribution.

The current recognition unit 340 includes an average current measurement unit 341 , a maximum current measurement unit 342 , and a minimum current measurement unit 343 , and when the welding torch 100 performs welding to the base material, the average current , the maximum current and the minimum current can be calculated, respectively. The above-described current is a data value required when the data calculating unit 370, which will be described later, calculates the current distribution.

On the other hand, the welding determination unit 350, when it is determined that the welding torch 100 performs welding, a welding speed measuring unit 360 for measuring the welding speed when the welding torch 100 performs welding to the base material is further added. may include

The welding speed measurement unit 360 includes an average speed measurement unit 361 , a maximum speed measurement unit 362 , and a minimum speed measurement unit 363 , and the average speed when the welding torch 100 performs welding. , maximum speed and minimum speed can be measured respectively. When measuring the welding speed, the measurement is made based on the start time measured by the start time measuring unit 351 and the end time measured by the end time measuring unit 352, and the average speed, the maximum speed, and the minimum speed data are Based on this, it can be used as one evaluation index that can evaluate the stability, penetration, and welding quality of the welding arc.

The data calculation unit 370 calculates the current, voltage, and position data of the welding torch 100 recognized by the data recognition unit 310 and the welding speed data of the welding torch 100 measured by the welding speed measurement unit 360 . It is possible to calculate the current, voltage, the position of the welding torch and the welding speed distribution of the welding torch, and calculate effective values of the current, voltage, position and speed based on the calculated distribution diagram.

Specifically, the data calculation unit 370 includes a current distribution calculation unit 371 for calculating a current distribution diagram, and a voltage distribution calculation unit 372 for calculating a voltage distribution diagram, in addition to calculating a distribution diagram of the position of the welding torch It may be configured to further include a welding position distribution calculator (not shown) and a welding speed distribution calculator (not shown) for calculating a distribution of the speed of the welding torch, and the present invention will be described based on current and voltage.

In addition, the data calculation unit 370 may further include a reference setting unit 373 capable of setting the current reference value and the voltage reference value in advance, and based on the current reference value and the voltage reference value set by the reference setting unit 373 , It may include an effective range setting unit 374 for setting the effective range.

As shown in FIG. 5 , when the data calculation unit 370 sets the current reference value and the voltage reference value (S) to, for example, 300mA and 30V, the effective range setting unit 374 sets a constant range (R) based on 300mA and 30V ) can be set. When the current distribution diagram and the voltage distribution diagram calculated by the current distribution calculator 371 and the voltage distribution calculator 372 are displayed in FIG. 5 , the reference value displayed within the effective range R can be calculated as an effective value. 5, there are 10 current distribution diagrams and voltage distribution diagrams, 6 values are displayed within the effective range (R), and 4 values are displayed outside the effective range (R).

The stability of the arc can be confirmed as a ratio through the effective values (the six effective values described with reference to FIG. 5 ), and the welding current and the welding voltage range deviation probability can be measured through this distribution diagram.

That is, according to an embodiment of the present invention, it is possible to calculate the presence or absence of welding, the welding speed, and the moving speed of the welding torch based on the current, voltage, and position and speed data sensed by the welding torch 100 , and more specifically Arc stability can be checked as a ratio using welding current and welding voltage, and the probability of deviation of welding current and welding voltage can be measured.

In addition, according to an embodiment of the present invention, it can be used as one evaluation index capable of evaluating the stability of the welding arc, penetration, and welding quality.

Although the present invention has been described in detail through one embodiment, this is for describing the present invention in detail, and the welding speed and arc stability measurement system according to the present invention is not limited thereto. And, terms such as "include", "compose", or "have" described above mean that the corresponding component may be embedded unless otherwise stated, so excluding other components is It should be construed as being able to further include other components instead of it, and all terms including technical or scientific terms are generally understood by those of ordinary skill in the art to which the present invention belongs, unless otherwise defined. has the same meaning as being

In addition, the above description is merely illustrative of the technical idea of the present invention, and various modifications and variations are possible by those of ordinary skill in the art to which the present invention pertains without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100 - welding torch 200 - sensor part
210 - position sensor 220 - voltage sensor
230 - current sensor 300 - server
310 - data recognition unit 320 - location recognition unit
321 - Travel distance measuring unit 322 - Required time measuring unit
330 - Voltage recognition unit 331 - Average voltage measurement unit
332 - Maximum voltage measurement unit 333 - Minimum voltage measurement unit
340 - Current recognition unit 341 - Average current measurement unit
342 - Maximum current measuring unit 343 - Minimum current measuring unit
350 - welding determination unit 351 - start time measurement unit
352 - End time measuring unit 360 - Welding speed measuring unit
361 - Average speed measuring part 362 - Maximum speed measuring part
363 - Minimum speed measuring unit 370 - Data calculating unit
371 - Current distribution calculator 372 - Voltage distribution calculator
373 - Reference setting unit 374 - Effective range setting unit

Claims (9)

Welding torch for welding the base material;
a current sensor for detecting the current of the welding torch, a voltage sensor for detecting the voltage of the welding torch, and a position sensor for detecting a position of the welding torch, a sensor unit built in the welding torch; and
a server receiving the information sensed by the sensor unit and calculating data; includes,
The server is provided with the information sensed by the sensor unit in real time to collect information of the welding torch, and a position recognition unit for recognizing information transmitted from the position sensor, and a voltage for recognizing information transmitted from the voltage sensor A data recognition unit comprising a recognition unit and a current recognition unit for recognizing information transmitted from the current sensor;
a welding determination unit that detects a current from the current sensor and determines whether welding is present;
a welding speed measuring unit for measuring the speed at which the welding torch welds the base material;
a data calculation unit for calculating a distribution of current and voltage when the welding torch is welded on the basis of the information collected from the data recognition unit; including,
The data calculation unit may include: a current distribution calculation unit configured to receive one or more current values calculated by the current recognition unit and calculate a current distribution diagram;
a voltage distribution calculator configured to receive one or more voltage values calculated by the voltage recognition unit and calculate a voltage distribution diagram;
a reference setting unit for presetting a current reference value and a voltage reference value; and
It includes; an effective range setting unit for setting the floating range of the current value and the voltage value based on the current and voltage values set by the reference setting unit;
The data calculation unit matches one or more current distribution diagrams calculated by the current distribution calculation unit to the effective range set by the effective range setting unit, and calculates an effective value of the welding current,
The data calculation unit matches one or more voltage distribution diagrams calculated by the voltage distribution calculation unit to the effective range set by the effective range setting unit, and calculates an effective value of the welding voltage, a welding speed and arc stability measurement system.
The method according to claim 1,
The welding determination unit determines the presence or absence of current detection in the current recognition unit to determine whether the welding torch is performing welding,
When the welding determination unit determines that the welding torch is performing welding, the welding start time and the welding end time are respectively calculated, a welding speed and arc stability measurement system.
3. The method according to claim 2,
The position recognition unit may include: a movement distance measuring unit for measuring a distance traveled by the welding torch while the welding torch is being welded to a base material; and
a required time measuring unit for measuring the welding time required for the moving distance of the welding torch measured by the moving distance measuring unit; A system for measuring welding speed and arc stability, comprising:
3. The method according to claim 2,
The voltage recognition unit may include: an average voltage measuring unit that calculates an average voltage when the welding torch performs welding;
a maximum voltage measuring unit for calculating a maximum voltage when the welding torch performs welding; and
a minimum voltage measuring unit for calculating a minimum voltage when the welding torch performs welding; A system for measuring welding speed and arc stability, comprising:
3. The method according to claim 2,
The current recognition unit may include: an average current measuring unit for calculating an average current when the welding torch performs welding;
a maximum current measuring unit for calculating a maximum current when the welding torch performs welding; and
a minimum current measurement unit for calculating a minimum current when the welding torch performs welding; A system for measuring welding speed and arc stability, comprising:
3. The method according to claim 2,
a welding speed measuring unit for measuring a speed at which the welding torch performs welding when the welding determination unit determines that the welding torch performs welding; further comprising,
The welding speed measuring unit measures the average speed, the maximum speed and the minimum speed when the welding torch performs welding, a welding speed and arc stability measurement system.
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