KR102022994B1 - electric welder capable of gouging and carbon dioxide - Google Patents

Abstract

The present invention relates to an electric welder having a gouging function, and in particular, an electric welder having a gouging and carbon dioxide welding having an image sensor and a temperature sensor to automatically adjust an output according to a temperature state of a welded part. It is about.

Description

Electric welder capable of gouging and carbon dioxide

The present invention relates to an electric welder, and more particularly, to an electric welder having a gouging function.

In more detail, the present invention relates to an electric welder having a gouging and carbon dioxide welding that is provided with an image sensor and a temperature sensor to automatically adjust the output according to the temperature and shape of the welded portion.

Welding is a method of heating and melting the metal material in the joint to rearrange and bond the atomic bonds of two different materials, such as arc welding, gas welding, thermite welding.

The apparatus used for such welding is called a welding machine, and the welding machine is a machine for joining metal materials to each other, and the electric welding machine includes a DC arc welding machine, an AC arc welding machine, and a resistance welding machine.

Among these electric welders, in particular, the carbon dioxide welder is usually welded in an inert gas such as carbon dioxide and argon, and the molten metal by the welding wire does not come into contact with the atmosphere to prevent oxidation or nitriding, and thus, iron, It is widely used for welding aluminum, copper, stainless steel, special steel, etc.

This carbon dioxide welding machine is mostly used in factories due to the above advantages, and is suitable for high speed welding.

Such a welder is not limited to simply the function for joining the two welded welds, and there are various kinds of welders having a gouging function for forming a groove in the weld or the welded weld.

Patent Documents 1 to 4 are examples of welding machines having such various functions.

Patent document 1 is a volume control unit which is operated by an operator to generate a voltage level signal corresponding to a voltage level suitable for welding; An operation controller for receiving a voltage level signal transmitted from the volume adjusting unit and generating a control signal for generating a voltage level corresponding to the received voltage level signal; A call signal generator for receiving a control signal from an operation controller, generating a corresponding call signal, and transmitting the generated call signal to a rectification and phase control unit; A rectification and phase control unit performing phase control of the voltage applied according to the firing signal; A DC reactor for converting a supplied voltage to a voltage level and applying the torch to the torch; And a short prevention unit connected between the operation control unit and the volume control unit to change the resistance value according to the voltage level signal and the amount of current for the operation of the volume control unit.

Patent document 2 is a welding rod provided to weld while pressing the material to be welded; And welding temperature measuring means provided in the interior of the welded material to measure the welded part temperature of the welded material, wherein the welding temperature measuring means is formed on the welded material and is mounted on the processing groove which is processed to the welded part. It relates to a welding temperature measuring device consisting of,

Patent document 3 is a portable welding rod gun with a sensor includes an internal operating means, the upper and lower channels, a cylindrical double tip, an outer upper panel means, an outer lower panel means, a power supply device , '

Patent document 4, In the inverter welding machine, Voltage / current setting unit for setting the voltage and current; Gouging switching switch; A constant voltage / constant current conversion switch for changing one output voltage and output current feedback signal into a signal of a predetermined size and then selecting and outputting one signal according to the operation of the gouge switching switch; And a PWM control circuit for operating an output of total power in a constant voltage type or a constant current type according to the feedback signal selected by the constant voltage / constant current switching switch.

Such a conventional welder has various functions as described above.

In particular, the carbon dioxide welding machine having a gouging function has a gouging function, but it is difficult to determine whether the groove formed by the gouging is formed correctly.

In addition, if the adjustment of the supplied voltage is not made correctly, the welding bead spreads, there is a problem that a defect occurs in welding.

Republic of Korea Patent No. 10-0707868 Republic of Korea Patent No. 10-0905601 Republic of Korea Patent Publication No. 10-2016-0017470 Korea Utility Model Registration No. 20-0287067

The present invention was developed in order to solve the problems of the prior art as described above, it is possible to gouging and carbon dioxide welding to automatically adjust the output according to the temperature and shape of the welding portion having an image sensor and a temperature sensor It is an object to provide an electric welder.

Furthermore, in the present invention, it is possible to use a sensing means according to a user's need as the sensing means can be detachably installed on the welding torch, and the power is supplied to the electrode by the sensing controller according to the image or temperature sensed by the sensing means. It is an object of the present invention to provide an electric welder capable of gouging and carbon dioxide welding, which allows more accurate welding to be made.

In order to achieve the above object, the gouging and carbon welding machine capable of welding the welding machine includes a welding torch for supplying a welding wire, and having a selection switch on one side, the carbon dioxide welding or gouging selected by the selection switch. In the electric welding machine capable of), the welding torch includes a non-contact temperature sensor for sensing the temperature of the welding portion; Image sensor for taking an image of the welded portion; And a blower means 13 for detaching air by blowing air to the welded portion and cooling the welded portion, wherein the inner circumferential surface is spaced apart from the outer circumferential surface of the extension portion between the welding wire discharge pipe portion and the handle portion of the welding torch. And a cylindrical fixing means detachably attached thereto, wherein the non-contact temperature sensor and the image sensor form a fixing hole at a side wall of the end portion of the cylindrical fixing means facing the welding wire discharge pipe, and fix the removable hole to the fixing hole. A rotation fixing groove was formed on the outer circumferential surface of the end facing the handle of the fixing means, and a cylindrical ring-shaped fixture formed on one side of the blowing means was fitted to change the direction of the blowing means. The welding main body includes the non-contact temperature sensor and the image sensor. To control the power supplied to the welding wire according to the sensed signal It further comprises a sensing controller.

The blowing means extends from one side of the ring-shaped fixture, and is configured by installing a blower motor having a blower blade inside the end toward the ring-shaped fixture of the telescopic blower tube which is connected and stretched by connecting pipes of different diameters. Can be.

The non-contact temperature sensor may be adjusted in a direction to face the surface of the welded object to which the welding wire is in contact, and the image sensor may be adjusted in a direction to face the rear of the direction in which the welding torch moves, and may further include a lighting means. have.

The sensing controller adjusts the arc by adjusting the power supplied to the welding wire when the signal received from the temperature sensor and the image sensor is out of the range of the reference signal compared to the preset reference signal.

As described above, the gouging and carbon dioxide weldable electric welder according to the present invention includes an image sensor and a temperature sensor, the welding bead by the sensing controller intermittent the power supplied to the welding wire according to the information detected by the two sensors Is prevented from being too wide or spatter is generated has the effect of enabling a more accurate welding.

In addition, in the case of gouging, it is also possible to form a gouging groove of a desired shape by controlling the power supplied by photographing the groove formed by the gouging in the image sensor.

1 is a perspective view of an example of an electric welding machine capable of welding the gouging and carbon dioxide according to the present invention
Figure 2 is a perspective view of an example of a welding torch provided with an electric welding machine capable of welding the gouging and carbon dioxide according to the present invention
Figure 3 is a perspective view of another example of the welding torch provided with the electric welding machine capable of welding the gouging and carbon dioxide according to the present invention
Figure 4 is a side view of the operating state of the welding torch provided with an electric welder capable of gouging and carbon dioxide welding according to the present invention

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the drawings, similar reference numerals are used for similar elements. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The present invention can be made not only more precise welding, but also can form a precision ring gouging groove.

The welding machine capable of welding the gouging and carbon dioxide according to the present invention, as shown in FIGS. 2 to 3, sensing means 11 and 12 detachably installed on the welding torch 10, and sensed by the sensing means. And a sensing controller 20 that automatically controls the power according to the signal.

The electric welding machine capable of welding the gouging and carbon dioxide according to the present invention, as shown in FIG. 1, has a welding main body 100 having a selector switch 100s in the same way as an electric welding machine having a conventional gouging function. , A feeder 200 connected between the welding main body and the welding torch 10, and a ground terminal 300 in contact with the welded object.

Of course, the welding main body 100 is provided with a transformer and control buttons, like a conventional welding machine, and a plurality of indicators and control levers are installed as shown in the figure to adjust the voltage or current supplied to the welding torch. You can adjust it manually.

The welding machine of the present invention also sets the basic voltage or current using these manual control levers, and the sensing means 11 and 12 and the sensing controller 20 for adjusting the fine current or voltage according to the welding state in the welding process. It is equipped with.

The sensing means 11 and 12 include a non-contact temperature sensor 11 and an image sensor 12.

The non-contact temperature sensor 11 and the image sensor 12 are detachably mounted to the welding torch 10 as shown in FIGS. 2 to 4.

The non-contact temperature sensor 11 is for detecting the temperature of the welded part. If the welding temperature is too high, a high temperature crack is generated and a low temperature crack is generated. Sensing the temperature, the sensed temperature is transmitted to the sensing controller 20, the sensing controller controls the voltage or current of the power supplied to the welding wire to maintain the optimum welding temperature.

Since the temperature of the welded portion is high temperature and abnormality may occur in the sensor when the temperature sensor is in direct contact with the high temperature, the non-contact temperature sensor 11 is preferably used as a non-contact type.

Examples of the non-contact temperature sensor 11 may be an infrared thermometer, thermography, advertising thermometer.

The image sensor 12 is a means for detecting an image of a welded or gouging portion, and may also select one of the ones resistant to heat.

The image sensor 12 may further include a lighting unit 12l.

The luminaire 12l is intended to obtain a clearer image by providing light when the image is captured by the image sensor.

The direction of the light of the luminaire 12l is preferably the photometry of the image to be photographed. When the direction of light irradiation of the luminaire is perpendicular to the welded or gouged portion, the image taken by the image sensor is expressed brightly as a whole, and thus the exact formation of the welded or gouged portion cannot be confirmed. The direction of the light is to form a shadow at the welded or gouged portion at a predetermined angle with the welded or gouged portion to capture a more accurate image of the welded or gouged portion.

As described above, when the voltage or current applied to the welding wire is not normal, the welding bead may be too wide or the gouge groove may be uneven.

The image sensor 12 may maintain the shape of the welding bead or gouging groove by photographing the shape of the welding bead or the shape of the gouging groove and adjusting the voltage or current of electricity supplied to the welding wire when the shape of the welding bead is changed. It is to be.

Of course, as described above, the temperature of the welding or gouging portion varies depending on the nature of the supplied electricity, and the shape of the normal welding bead or gouging groove can be maintained by adjusting the voltage or current of the supplied electricity according to the temperature. When the power is controlled only by the temperature, the shape of the welding bead or the gouging groove cannot be kept constant. Therefore, the image sensor 12 is further installed to compare the image detected by the preset reference image with the non-contact temperature. The temperature sensed by the sensor 11 is to control the power supply by comparing with the preset reference temperature.

The non-contact temperature sensor 11 and the image sensor 12 is installed on one side of the welding torch 10, as shown in Figures 2 and 3, the preferred position is a welding wire discharge pipe portion 10p installed at the end of the welding torch ) Is one end.

That is, as illustrated in FIG. 4, the sensing direction is set to sense the temperature and the image of the welded portion to which the welded wire is in contact.

In this way, an extension portion 10e is provided between the welding wire discharge pipe portion 10p and the handle portion 10h of the welding torch 10 to install the non-contact temperature sensor 11 and the image sensor 12 on the welding torch 10. Is formed.

The extension portion 10e is a cylindrical portion extending from the handle portion, the cylindrical fixing means 19 is installed on the outer peripheral surface.

The cylindrical fixing means 19 is a means for detachably fixing the non-contact temperature sensor 11 and the image sensor 12 to form a cylindrical shape so as to be spaced apart from the outer circumferential surface of the extension portion 10e. Can be detached.

The non-contact temperature sensor 11 and the image sensor 12 forms a fixing hole (19h) on the outer peripheral surface of one side end of the cylindrical fixing means 19, that is, the end facing the welding wire discharge pipe (10p), The protrusions formed on one side can be fitted together.

The cylindrical fixing means 19 may be further provided with a plurality of vent holes 10a to allow air to pass through the extension portion heated in the weld tube to prevent the extension portion from being heated.

In addition, the electric welding machine of the present invention is preferably provided with a blowing means 13 to the welding torch 10.

In general, it is preferable to remove the impurities because impurities may be generated in the welded portion during the welding process and the impurities may affect the determination of abnormality of the welded portion by covering the welded portion.

Accordingly, the blower 13 is further installed to supply wind to the welded portion to blow off foreign substances and cool the welded portion.

The blowing means 13 may be implemented by various modifications, but preferably, as shown in FIGS. 2 and 3, it extends from one side of the ring-shaped fixing tool 13r detachable to the cylindrical fixing means 19. In this case, the blower motor 13m is installed in the inside of the delmetric blower tube 13p, which is connected to each other by pipes having different diameters.

If the output of the blowing means 13 is too strong, it may affect the welding temperature, the output of the blowing means is enough to blow out impurities.

Ring-shaped fixture 13r constituting the blowing means 13 is rotated by being coupled to the rotation fixing groove 19r formed on the outer peripheral surface of one end of the cylindrical fixing means 19, as shown in Figs. It was possible to adjust the direction of the outlet of the end of the deliscoping blower (13p).

The eletronic blower tube 13p constituting the blowing means 13 is for controlling the distance between the outlet and the welded object.

If the distance between the outlet and the object to be welded is too close, the welding part can be cooled and the welding can be done correctly. If it is too far, impurities can not be separated smoothly, so the distance between the outlet and the object to be welded can be adjusted according to the material of the object to be welded. It was made.

The non-contact temperature sensor 11 and the image sensor 12 may be configured as shown in FIG. 3, but preferably, separately configured as shown in FIGS. 2 and 4.

That is, the non-contact temperature sensor 11 detects the temperature of the welded portion, but the image sensor 12 preferably detects the back of the welded portion rather than the welded portion.

Accordingly, as illustrated in FIGS. 2 and 4, the non-contact temperature sensor 11 and the image sensor 12 are preferably separately configured.

In addition, the position of the non-contact temperature sensor 11 and the image sensor 12 is preferably arranged as shown in FIG.

That is, the non-contact temperature sensor 11 is disposed in front of the direction in which the welding torch moves to sense the temperature of the welded portion, and the image sensor 12 is disposed in the rear of the direction in which the welding torch moves and welded. It is preferable to detect an image of the part, and for this purpose, the cylindrical fixing means 19 is preferably rotatably installed on the outside of the extension 10e.

The sensing controller 20 adjusts the power supplied to the welding wire when the signal received from the non-contact temperature sensor 11 and the image sensor 12 is out of the range of the reference signal in comparison with a preset reference signal. Adjust the Arc.

That is, the sensing controller 20 stores reference information about an image of an appropriate welding temperature according to a material to be welded and a shape of a welding bead, and the reference information includes a non-contact temperature sensor 11 and an image sensor 12. In contrast to the information sensed in), it adjusts the voltage or current of the electric fan supplied to the welding wire.

10: welding torch 10p: welding wire discharge pipe 10h: handle
10e: extension
11: non-contact temperature sensor 12: image sensor 12l: lighting means
13: blowing means
13m: blown motor 13p: telescopic blower
13i: Inlet port 13r: Ring type fastener
19: cylindrical fixing means
19r: rotating fixing groove 19h: fixing hole
20: sensing controller
100: welding body 100s: selection switch
200: feeder
300: ground terminal

Claims (4)

In the electric welding machine having a welding torch 10 to which the welding wire is detached and having a selection switch 100s on one side, carbon dioxide welding or gouging selected by the selection switch,
A cylindrical fixing means (19) having an inner circumferential surface detached from the outer circumferential surface of the extension portion (10e) between the welding wire discharge pipe portion (10p) and the handle portion (10h) of the welding torch (10) and installed to be rotatable;
A rotation fixing groove portion 19r formed on an outer circumferential surface of the end portion facing the handle portion 10h of the cylindrical fixing means 19;
A fixing hole 19h formed at an end sidewall of the cylindrical fixing means 19 facing the welding wire discharge pipe portion 10p;
A non-contact temperature sensor 11 having a protrusion formed at one side to be detached and fixed to the fixing hole 19h and sensing a temperature of a welding part;
An image sensor 12 having a protrusion formed at one side to be detachably fixed to the fixing hole 19h, and photographing a shape of a welding bead or an image of a gouging groove;
A ring-shaped fixture (13r) is formed so that the direction of the blowing means (13) is inserted into the rotation fixing groove (19r) can be switched, and extending from one side of the ring-shaped fixture (13r), the pipe of different diameters It comprises a telescopic blower tube 13p formed to connect and stretch, and a blower motor 13m having a blower wing provided inside the end portion facing the ring-shaped fixture 13r, and supplies foreign matter by supplying wind to the welded part. Blowing means for blowing the cooling portion to cool the weld;
It is provided in the main body of the welder, and compares the signal transmitted from the non-contact temperature sensor 11 and the signal transmitted from the image sensor 12 with the preset reference signal to control the power supplied to the welding wire when out of the range of the reference signal Including; sensing controller 20 for adjusting the arc;
The non-contact temperature sensor 11 is adjusted so that the welding wire is in contact with the surface of the workpiece to be contacted, the image sensor 12 is adjusted to face the rear of the direction in which the welding torch 10 moves, welding The electric welding machine capable of welding the gouging and carbon dioxide, characterized in that the non-contact temperature sensor 11, the welding torch 10, the image sensor 12, the blowing means 13 are arranged in order based on the working direction. delete delete delete

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