CN110788460A - Arc length adjuster - Google Patents

Abstract

The invention relates to the field of welding technology, in particular to an arc length regulator. The arc length adjuster includes a sliding mechanism, a welding torch fixing mechanism, a cooling mechanism and a signal collector. The welding torch is installed on the welding torch fixing mechanism, the electrodes corresponding to the cooling mechanism and the welding torch are immersed in cooling water, and the signal collector is connected to the welding circuit. The arc length adjuster of the invention enables the welding arc to burn stably, the arc length can be continuously adjusted and the arc length can be accurately measured, and the welding current and arc welding voltage can be collected at the same time by collecting data through circuit control.

Description

An arc length regulator

technical field

The invention relates to the technical field of welding, in particular to an arc length regulator.

Background technique

In the prior art, the method for measuring the static volt-ampere characteristics, arc voltage and arc length characteristics of DC TIG (tungsten inert gas welding) arcs is to use experimental engineers to perform manual welding and manually control arc combustion and arc length.

When manual welding controls the arc, the welding arc is difficult to stabilize; and the arc length cannot be measured; when measuring the welding current and arc welding voltage, due to the time error, the welding current and arc welding voltage cannot be accurately measured at the same time, so the error is large.

SUMMARY OF THE INVENTION

In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an arc length regulator, which is used to solve the problem that the welding arc is difficult to stabilize when the arc is controlled by manual welding in the prior art; and the arc length cannot be measured; When the current and arc welding voltage are used, due to the time error, the welding current and arc welding voltage cannot be accurately measured at the same time, so the error is large.

In order to achieve the above object and other related objects, the present invention provides an arc length adjuster, the arc length adjuster includes:

Welding torch fixing mechanism, on which the welding torch is installed;

a sliding mechanism on which the welding torch fixing mechanism is mounted;

a cooling mechanism, the electrodes corresponding to the welding torch are immersed in cooling water;

A signal collector, which is connected to the welding circuit.

In an embodiment of the present invention, the sliding mechanism includes:

a moving slider, which is fixedly connected with the welding gun fixing mechanism;

The screw rod is fixedly connected with the moving slider.

In an embodiment of the present invention, the cooling mechanism includes:

an electrode corresponding to the welding gun to form a closed loop of the welding circuit with the welding gun;

The water tank is provided with cooling water inside, and the electrode is arranged in the water tank.

In an embodiment of the present invention, the signal collector includes:

a current collector, used for collecting the current signal of the arc of the welding circuit;

a voltage collector, used for collecting the voltage signal of the arc of the welding circuit;

a central processing unit, which is connected to the current collector and the voltage collector, and the central processing unit is configured to receive and process the current signal and the voltage signal to obtain the processed current signal and the voltage signal;

The upper computer is used for receiving the processed current signal and voltage signal, so as to obtain the static volt-ampere characteristic of the arc and the arc voltage and arc length characteristic curve.

In an embodiment of the present invention, the electrodes are copper blocks.

In an embodiment of the present invention, the welding torch fixing mechanism includes a welding torch holder and a welding torch, and an accommodation space for accommodating the welding torch is provided inside the welding torch holder.

In an embodiment of the present invention, the accommodating space is cylindrical.

In an embodiment of the present invention, the sliding mechanism further includes:

A fixed screw device is threadedly connected with the screw.

In an embodiment of the present invention, the signal collector further includes a display, and the display is used to display the static volt-ampere characteristics and arc voltage and arc length characteristic curves of the arc.

The present invention also provides a method for measuring the static volt-ampere characteristics of an arc and a characteristic curve of arc voltage and arc length. The static volt-ampere characteristics of the arc and the measurement methods of the arc voltage and arc length characteristic curves include:

Continuously adjust and measure the arc length of the arc;

Arc stable combustion;

Collect the current signal of the arc;

Collect the voltage signal of the arc;

receiving and processing the current signal and voltage signal to obtain the processed current signal and voltage signal;

The processed current signal and voltage signal are received to obtain and display the static volt-ampere characteristic and arc voltage and arc length characteristic curve of the arc.

As mentioned above, an arc length regulator of the present invention has the following beneficial effects:

The training device of the present invention includes a welding torch fixing mechanism, a sliding mechanism, a cooling mechanism and a signal collector, and the welding torch is installed on the welding torch fixing mechanism. Continuous adjustment and accurate measurement of arc length, the present invention can accurately measure welding current and arc welding voltage at the same time.

The signal collector of the present invention includes a current collector, a voltage collector, a central processing unit and a host computer. The invention uses an electronic circuit to process the collected data, which ensures that the collected data is eliminated, errors are eliminated, and the collected data is output at the same time.

The static volt-ampere characteristic of the arc and the arc voltage and arc length characteristic curve measurement method of the present invention overcomes the cumbersome and low precision test work of the arc static characteristic and arc voltage and arc length characteristic experiments in the prior art.

Description of drawings

FIG. 1 is a schematic structural diagram of a sliding mechanism of an arc length adjuster according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a welding torch fixing mechanism of an arc length adjuster according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a signal collector of an arc length regulator according to an embodiment of the present application.

4 is a schematic work flow diagram of a static volt-ampere characteristic of an arc and a method for measuring arc voltage and arc length characteristic curves according to an embodiment of the present application.

5 is a schematic work flow diagram of a central processing unit of a method for measuring static volt-ampere characteristics of an arc and a characteristic curve of arc voltage and arc length according to an embodiment of the present application.

Component label description

1 CPU

2 Current collectors

3 Voltage collector

4 host computer

5 cameras

6 monitors

7 Welding gun fixing mechanism

10 Fixed block guides

20 Sliding mechanism

21 Move the slider

22 lead screw

23 Fixed screw device

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.

It should be noted that the diagrams provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic way, so the diagrams only show the components related to the present invention rather than the number, shape and For dimension drawing, the type, quantity and proportion of each component can be changed at will in actual implementation, and the component layout may also be more complicated.

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a schematic structural diagram of a sliding mechanism of an arc length adjuster according to an embodiment of the present application. FIG. 2 is a schematic structural diagram of a welding torch fixing mechanism of an arc length adjuster according to an embodiment of the present application. The present invention provides an arc length adjuster, which includes a sliding mechanism 20, a welding torch fixing mechanism 7, a cooling mechanism and a signal collector. In the sliding mechanism 20 , specifically, the guide groove of the moving slider 21 is matched with the fixed block guide rail 10 , so that the moving slider 21 can slide up and down on the fixed block guide rail 10 . The fixed block guide rail 10 may be provided with, but not limited to, a guide rail, and the moving slider 21 may be provided with, but not limited to, a guide groove. The welding torch fixing mechanism 7 is fixed on the moving slider 21 . The welding torch fixing mechanism 7 includes a welding torch holder and a welding torch, and an accommodation space for accommodating the welding torch is provided inside the welding torch holder. The welding torch can be, but is not limited to, a circular welding torch, the interior of the accommodating space can be, but not limited to, a frustum-shaped space, and the welding torch is arranged inside the frustum-shaped space, and the outside of the accommodating space can be, but not limited to, a frustum-shaped space. Limited to three-dimensional. The function of the welding torch is to hold the tungsten electrode, conduct the welding current, transport the argon gas, and cool the tungsten electrode. The continuous discharge is maintained under the continuous arc to ensure the continuous arcing of the arc. The cooling mechanism corresponds to the welding torch, so as to form a closed loop of the welding circuit with the welding torch. Specifically, the cooling mechanism includes an electrode and a water tank, and cooling water is arranged inside the water tank, and the electrode is arranged in the The cooling water in the water tank is slightly higher than the cooling water surface. The electrode can be but not limited to pure copper. The function of the electrode is to conduct the welding current, so that the welding gun transmits the welding current to the copper electrode to form a welding arc. And absorb the heat from the welding arc, the cooling water in the water tank, the cooling water can be but not limited to water, the function of the cooling water is to circulate and cool the heat absorbed by the electrode, preventing the electrode from overheating and collapsing, Ensure that the arc length is stable and constant. The signal collector is connected to the welding circuit. Specifically, one end of the voltage signal collector is connected to the welding torch, the other end of the voltage signal collector is connected to the electrode, and the current signal collector is connected to the electrode. Cable connection to welding circuit via Hall current sensor. In the arc length regulator of the present invention, specifically, the welding torch in the welding torch fixing mechanism 7 discharges the electrode through the clamped tungsten electrode tip, and the welding torch transmits the welding current to the electrode through the tungsten electrode to form a welding arc, igniting the arc, And maintain continuous discharge under the protection of argon gas to ensure continuous arcing of the arc, the electrode placed in the cooling water in the water tank conducts welding current and absorbs the energy input by the welding arc, and then is cooled by circulating cooling water in the water tank to offset, so as to ensure the arc stable arc. The sliding mechanism 20 includes a moving slider 21 , a screw rod 22 and a fixed screw device 23 . The moving slider 21 is connected to the guide rail of the fixed block guide rail 10 , and the screw rod 22 is fixed to the moving slider 21 . connection, the screw 22 is connected with the fixed screw device 23 in a threaded connection, the screw 22 passes through the thread on the fixed screw device 23, and the rotating screw 22 moves up and down in the thread of the fixed screw device 23, thereby The sliding block 21 is driven to move. Since the welding gun fixing mechanism 7 is fixed on the sliding block 21, the welding gun fixing mechanism 7 is further driven to move. Since the welding gun is installed on the welding gun fixing mechanism 7, all the welding guns used for welding are driven. The welding torch moves up and down, thereby adjusting the distance between the tungsten electrode held by the welding torch and the electrode (the arc length during welding), so that the measured arc length is converted into the distance of the up and down movement of the lead screw 22. The lead screw The distance of the up and down movement of the 22 can be measured by, but not limited to, a ruler, so the arc length adjuster of the present invention can not only make the welding arc stable. The length of the arc can also be adjusted continuously, and the length of the arc can be easily and accurately measured. Using the cooling mechanism of the arc length regulator of the present invention enables the obtained welding arc to burn reliably and stably without contact. By using the mechanical structure of the present invention, the length of the arc can be continuously adjusted and accurately measured under the stable arcing state of the welding arc. Using the microcomputer of the present invention to collect data, the welding current and welding voltage of the same arc length for a certain time can be collected.

Please refer to FIG. 3 , which is a schematic structural diagram of a signal collector of an arc length regulator according to an embodiment of the present application. The signal collector includes a current collector 2 , a voltage collector 3 , a central processing unit 1 and a host computer 4 . The current collector 2 is used to collect the current signal of the arc. The voltage collector 3 is used to collect the voltage signal of the arc. Specifically, the current collector 2 and the voltage collector 3 simultaneously collect the current signal and the voltage signal of the arc forming a closed loop between the welding torch and the electrode. Specifically, the current collector 2 may be, but not limited to, a Hall current sensor or a current transformer, and the model of the central processing unit 1 may be, but not limited to, STM32F103ZET6. The central processing unit 1 is connected with the current collector 2 and the voltage collector 3, and the central processing unit 1 is used to receive and process the current signal and voltage signal to obtain the processed current signal and voltage signal. . The upper computer 4 is used for receiving the processed current signal and voltage signal, so as to obtain the static volt-ampere characteristic and arc voltage and arc length characteristic curve of the TIG welding arc. The signal collector further includes a display 6, and the display 6 is used to display the static volt-ampere characteristics of the arc and the arc voltage and arc length characteristic curves. The signal collector also includes a camera 5 . The current collector 2 and the voltage collector 3 can measure electrical parameters such as alternating current, alternating voltage and frequency from 45 Hz to 60 Hz, as well as direct current and direct voltage, and communicate with the central processing unit 1 to collect the collected current data. , the voltage data is transmitted to the central processing unit 1, and the central processing unit 1 communicates with the host computer 4 through the serial port, and uploads the obtained current signal and voltage signal to the host computer 4, and through the host computer 4 Write the calculation information on the above, and obtain the static volt-ampere characteristics of the arc and the arc voltage and arc length characteristic curves. The host computer 4 is connected to the camera 5 through USB, the camera 5 collects on-site image data, the host computer 4 is connected to the display 6 through a VGA interface, and the static volt-ampere characteristics, arc voltage and arc length characteristics of the arc are calculated. Curves and live images are displayed. The arc length regulator of the present invention can continuously adjust the length of the arc under the stable burning state of the arc, and can conveniently and accurately measure the length of the arc. Moreover, the present invention uses a signal collector, and the circuit controls the acquisition of data, so that the welding current and the arc welding can be collected at the same time. Voltage. The arc length regulator of the present invention not only has reliable performance, but also overcomes the shortcomings of the current experiments on the static characteristics of the arc, arc voltage and arc length characteristics, and the cumbersome testing work and low precision. The arc length regulator of the invention can not only test the static characteristics, arc voltage and arc length characteristics of the arc, but also test the influence of different gas media on the arc.

Please refer to FIG. 4 and FIG. 5 . FIG. 4 is a schematic work flow diagram of a method for measuring static volt-ampere characteristics of an arc and an arc voltage and arc length characteristic curve according to an embodiment of the present application. 5 is a schematic work flow diagram of a central processing unit of a method for measuring static volt-ampere characteristics of an arc and a characteristic curve of arc voltage and arc length according to an embodiment of the present application. The present invention also provides a method for measuring the static volt-ampere characteristics of an arc and a characteristic curve of arc voltage and arc length. The static volt-ampere characteristic of the arc and the method for measuring the arc voltage and arc length characteristic curve include: S1, continuously adjusting and measuring the arc length of the arc. S2, the arc burns stably. S3. Collect the current signal of the arc. S4, collect the voltage signal of the arc. S5. Receive and process the current signal and the voltage signal to obtain the processed current signal and the voltage signal. S6. Receive the processed current signal and voltage signal to obtain the static volt-ampere characteristic and arc voltage and arc length characteristic curve of the arc. Specifically, the collecting of the current signal of the arc in step S3 and the collecting of the voltage signal of the arc in step S4 are performed simultaneously, and the current signal of the arc and the voltage signal of the arc are collected simultaneously. Before the acquisition, the central processing unit 1 needs to be initialized, and the initialization operation includes but is not limited to initializing the serial port of the central processing unit 1, initializing the ADC (analog-to-digital converter) of the central processing unit 1 ), read and process the current signal of the arc and the voltage signal of the arc. The current collector 2 collects the current signal of the arc, including but not limited to initializing the clock enable signal, initializing the ADC signal, enabling the ADC signal, reading the ADC signal, and calculating the current value. The voltage collector 3 collects the voltage signal of the arc, including but not limited to initializing the clock enable signal, initializing the serial port signal, enabling the serial port signal, sending and receiving serial port signals, and calculating the voltage value. The processed current signal and voltage signal are received by the host computer 4 to obtain the static volt-ampere characteristic and arc voltage and arc length characteristic curve of the arc. The static volt-ampere characteristic of the arc and the arc voltage and arc length characteristic curve measurement method of the present invention overcomes the cumbersome and low precision test work of the arc static characteristic and arc voltage and arc length characteristic experiments in the prior art.

To sum up, the training device of the present invention includes a sliding mechanism 20, a welding torch fixing mechanism 7, a circulating cooling mechanism and a signal collector. The welding torch fixing mechanism 7 is provided with a welding torch. The arc is stable, the length of the arc can be continuously adjusted, and the arc length can be accurately measured. The invention can also accurately measure the welding current and the arc welding voltage at the same time.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

1. An arc length adjuster, characterized in that it comprises:

the welding gun fixing mechanism is provided with a welding gun;

the sliding mechanism is provided with the welding gun fixing mechanism;

a cooling mechanism in which an electrode corresponding to the welding torch is immersed in cooling water;

and the signal collector is connected with the welding loop.

2. The arc length adjuster according to claim 1, wherein the sliding mechanism comprises:

the movable sliding block is fixedly connected with the welding gun fixing mechanism;

and the screw rod is fixedly connected with the movable sliding block.

3. An arc length adjuster according to claim 1, wherein said cooling mechanism comprises:

an electrode corresponding to the welding gun to form a closed loop of a welding circuit with the welding gun;

the electrode is arranged in the water tank.

4. The arc length regulator of claim 1, wherein the signal collector comprises:

the current collector is used for collecting a current signal of an electric arc of the welding loop;

the voltage collector is used for collecting a voltage signal of an electric arc of the welding loop;

the central processing unit is connected with the current collector and the voltage collector and is used for receiving and processing the current signals and the voltage signals to obtain processed current signals and processed voltage signals;

and the upper computer is used for receiving the processed current signals and voltage signals so as to obtain the static volt-ampere characteristic of the electric arc and the characteristic curve of the arc voltage and the arc length.

5. An arc length adjuster according to claim 3, wherein: the electrodes are copper blocks.

6. An arc length adjuster according to claim 1, wherein: the welding gun fixing mechanism comprises a welding gun support and a welding gun, and an accommodating space for accommodating the welding gun is formed in the welding gun support.

7. An arc length adjuster according to claim 6, wherein: the accommodating space is cylindrical.

8. The arc length adjuster according to claim 2, wherein said sliding mechanism further comprises:

and the fixed screw rod device is in threaded connection with the screw rod.

9. An arc length adjuster according to claim 4, wherein: the signal collector also comprises a display, and the display is used for displaying the static volt-ampere characteristic and the arc voltage and arc length characteristic curve of the electric arc.

10. The method for measuring the static volt-ampere characteristic and the arc voltage and arc length characteristic curve of the electric arc is characterized in that: the method for measuring the static volt-ampere characteristic and the arc voltage and arc length characteristic of the arc, which comprises the arc length adjuster according to any one of claims 1 to 9, comprises the steps of:

continuously adjusting and measuring the arc length of the arc;

stable combustion of the electric arc;

collecting current signals of the electric arc;

collecting voltage signals of the electric arc;

receiving and processing the current signal and the voltage signal to obtain a processed current signal and a processed voltage signal;

and receiving the processed current signal and voltage signal to obtain and display the static volt-ampere characteristic and the arc voltage and arc length characteristic curve of the arc.

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