KR0154052B1 - Gas brazing robot system - Google Patents

Abstract

In the case of welding work on the thin plate panel, the preheating is appropriately performed and the welding is performed to suppress the generation of tempo collar so that the coating property is improved, and the welded part is uniformly and completely. In order to achieve a beautiful appearance, and at the same time to improve the productivity by automating the welding work, the structure is a base coupled to the front end of the robot arm, but installed to flow left and right on the base A torch lamp that is coupled to a motor that provides an external force to allow the torch lamp to flow left and right, and a wire is installed on one side of the base to supply a wire close to the tip of the torch lamp. Gas brazing robot sheath consisting of wire forward and reverse Provide the system.

Description

Gas Brazing Robot System

1 is a flow diagram illustrating an embodiment according to the present invention.

2 is a flow diagram of a gas mixer according to the present invention.

3 is a coupling state of the tool unit according to the present invention.

4 is a detailed view of a portion showing means for flowing the torch ramp.

5 is a perspective view showing a torch lamp of the present invention.

6 is a state diagram showing a wire supply means according to the present invention.

Figure 7 is a state diagram showing a state of welding the door according to the present invention.

The present invention relates to a gas brazing robot system, in particular to enable gas brazing welding the door chassis and the frame by using a robot, to prevent the non-uniformity of the weld portion that may occur during welding, and at the same time improve the quality It relates to a gas brazing robot system that can automate work to produce large quantities of systematic and stable quality.

In general, a gas brazing operation performed by a robot system is performed by preheating a welding part for a predetermined time and then welding the wire by bringing the wire into close proximity.

Conventionally, after the frame is coupled to the door panel and fixed by the operator, the gas supplied from the oxygen cylinder and the acetylene cylinder is produced by using a torch lamp to create a gas flame, and at the same time, the electrode is close to the position to be welded to melt.

Therefore, the frame is fixed to the door panel by the welding rod to be melted.

As described above, when the heating panel is heated to a high temperature during welding because the panel panel is a thin panel, a problem arises in that a tempo collar is generated near the welding site. There is a problem that the deterioration.

In another problem, when an inexperienced worker performs a welding operation, a welding tip may be attached to the door panel by the incomplete welding operation or the welding may be nonuniform, resulting in a flaw in the appearance of the door.

As another problem, there is a problem in that productivity is lowered due to poor workability because the worker must work on the move.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to prevent the occurrence of tempo collar by appropriately preheating and welding when welding to a thin plate panel, the paintability To improve.

Another object is to improve the productivity by making the welded portion uniform and complete so as to have a beautiful appearance, and at the same time automate the welding operation.

The present invention for realizing this, the base is coupled to the front end of the robot arm, the torch lamp is installed to flow left and right on the base, and provides an external force so that the torch lamp can flow left and right. And a motor for coupling the cam, and a wire forward and reverse device that is installed at one side of the base and guides the wire to be supplied close to the distal end of the torch lamp.

In another feature, the motor is coupled to the board but forms a slider on one side of the board, and at the same time the slider is slidably coupled to the guide installed in the longitudinal direction at one end of the base.

In another feature, the torch ramp flowing to the left and right, the shaft is fixedly coupled to the body is configured, the shaft is rotatably coupled to a bearing installed on the base.

In another feature, the supply pipe for inducing the flow of the mixed gas to the body is coupled, the combustion pipe is coupled to the supply pipe, the front end of the water to cool the overheated pipe The tank is installed.

In still another aspect, a gas distribution tank is provided to couple a plurality of combustion pipes to a distal end of the supply pipe, and to evenly distribute the gas supplied to the pipe.

In another feature, a cylinder is provided to provide an external force so that the board to which the motor is coupled can be transferred forward and backward along the guide, the rod end of the cylinder is coupled to the rear of the board.

In another feature, the wire before and the reverse device is coupled to the guide tube to slide the support bracket, the cylinder which provides an external force to move forward and backward to the guide tube is coupled.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

First, as shown in FIG. 1, by properly mixing and supplying the gas to be supplied, a gas mixing device 2 is configured which adjusts to produce a temperature suitable for welding operation, and this gas mixing device 2 An oxygen tank 4, an acetylene tank 6, an air compressor 8, and an liquefied petroleum gas (LPG) tank 10 are connected to each other.

The gas mixing device 2 is connected to a hose 12 which can supply gas, and a part of the hose 12 prevents oxidation when the mixed gas is melted and the wire is melted. Solvent is connected to the contained flux tank 14.

The hose 12 connected to the outlet of the flux tank 14 is connected to the supply unit 16.

In addition, a gas mixing device control panel 18 is provided, which serves to adjust the gas supplied to the gas mixing device 2 to be properly mixed, and at the same time adjusts the following devices.

In addition, the wire supply unit 24 which connects the wire 22 from the wire supply roll 20 provided in the gas mixing device control panel 18 and adjusts it to be appropriately supplied is connected.

Then, the wire supply unit 24 is connected to the wire forward and backward devices 26 for adjusting the wire 22 to be close or separated so that welding may be performed after the welding part is properly preheated.

Subsequently, a control unit 28 is connected to the gas mixer control panel 18, which includes a robot 32 coupling the tool unit 16 to the tip of the arm 30. A line process control panel 34 for controlling the flow of the production line is connected.

In addition, an automatic ignition unit 36 is connected to the gas mixing device 2, which is provided with an ignition torch to ignite a gas mixed with LPG and supplied air. A lot flame torch 38 and an ignition sensor 40 for checking whether the pilot flame torch 38 is ignited are provided, respectively.

The door fixing jig 44 which can fix the door 42 in the position isolate | separated from the above is provided.

On the other hand, the structure of the gas mixing device 2 is shown in Figure 2 as follows.

First, a primary main gas manometer 46 is connected to check the pressure of oxygen supplied from the oxygen tank 4, and the oxygen pressure is adjusted to a predetermined pressure in the primary main gas manometer 46. A primary pressure regulator 48 is provided which is equipped with a primary pressure gauge 50.

In addition, an oxygen pressure sensing switch 52 is connected to adjust the oxygen pressure supplied to the primary pressure regulator 48 so as to block the oxygen.

An oxygen solenoid valve 54 is connected to the oxygen pressure sensing switch 52 to supply and shut off the oxygen supplied by the gas mixer control panel 18.

In addition, a secondary pressure gauge 56 capable of checking the pressure of the supplied oxygen is connected to the oxygen solenoid valve 54, and at the same time to adjust the amount of gas supplied to the secondary pressure gauge 50. The secondary gas regulator 58 is connected.

The secondary gas regulator 58 is connected to a flow meter 60 that adjusts the flow rate of the supplied gas precisely, and a digital gauge 62 for checking the gas flow rate.

A solenoid valve 64 is connected to the flow meter 60 to supply and shut off the amount of gas flowing out through the gas mixer control panel 18, and at the same time, the torch lamp 66 is connected to the solenoid valve 64. ) Is connected.

On the other hand, the structure installed between the solenoid valve 54 and the torch lamp 66 connected to the oxygen pressure sensing switch 52 is set to A line 68, and the same structure as this A line 68 is Installation is made between the solenoid valve 54 and the torch lamp 66 connected to the oxygen pressure sensing switch 52, and the line is set as the B line 70.

The A line 68 and the B line 70 are selectively used according to the working conditions.

At the same time, a primary main gas manometer 72 is connected to the acetylene tank 6, which is supplied with the oxygen, to check the pressure of oxygen supplied from the oxygen tank 4, and the primary main gas manometer A compensation tank 74 is connected to prevent the gas amount of acetylene supplied to 72 from changing.

The compensation tank 74 is provided with a primary pressure regulator 76 capable of adjusting the pressure of acetylene to a predetermined pressure with a primary pressure gauge 78.

The primary pressure regulator 76 is connected with a flashback arrestor 80 which prevents a gas explosion when a flashback occurs due to inadvertent use or wear of a component during the use of acetylene.

In addition, a gas circuit breaker 82 is connected to the flashback arrestor 80 to operate when the operator turns on the emergency stop switch installed at the work site over the peripheral equipment. The gas circuit breaker 82 is used gas from a gas pipe. Is connected to the gas detector 84 so that it can detect when it leaks.

The gas blocker 82 is connected to a gas filter 86 capable of filtering impurities contained in acetylene.

A gas pressure switch 88 is connected to the gas filter 86 to prevent excessive increase in the pressure of acetylene.

The gas pressure switch 88 is connected to a solenoid valve 90 which can supply and shut off the acetylene supplied by the gas mixer control panel 18.

In addition, a secondary pressure gauge 92, which is capable of checking the pressure of acetylene to be supplied, is connected to the solenoid valve 90, and at the same time, the secondary pressure gauge to adjust the amount of gas supplied to the secondary pressure gauge 92. Gas regulator 94 is connected.

The secondary gas regulator 94 is connected to a flow meter 96 for adjusting the flow rate of the supplied gas accurately and a digital gauge 98 for checking the gas flow rate.

The solenoid valve 100 is connected to the flow meter 96 so as to supply and shut off the amount of gas flowing out through the gas mixing device control panel 18, and at the same time, to make the solenoid valve 100 neutral. Flash tank 14, which is connected to prevent fluidity of the material and surface oxidation of the panel during welding, is connected, and a flashback arrestor designed to prevent backfire and explosion of gas supplied to flux tank 14 102 is connected and at the same time the torch lamp 66 is connected to this flashback arrestor 102.

On the other hand, the structure provided between the solenoid valve 90 and the flux tank 14 connected to the gas pressure sensing switch 88 is set to A line 104, and the same structure as this A line 104 is the gas. Installation is made between the solenoid valve 90 and the flux tank 14 connected to the pressure sensing switch 88, the line is set to B line 106.

The A line 104 and the B line 106 are selectively used according to the working conditions.

Along with this, the air compressor 8 constituting a part of the gas mixing device 2 and the L.P.G tank 10 are connected, and the structure thereof is as follows.

First, the air compressor 8 is connected to a pressure regulator 106 for adjusting the supplied air to an appropriate pressure, and the air supplied to the pressure regulator 106 by the gas mixer control panel 18. One solenoid valve 108 is connected to supply and shut off.

In addition, an air pressure sensing switch 110 is connected to block the supply of the air supplied to the solenoid valve 108 with excessive pressure.

The air pressure sensing switch 110 is connected to an air pressure regulating valve 112 that allows the supplied air to pass while maintaining a predetermined pressure.

In addition, the air pressure control valve 112 is connected to the mixer 114 to properly mix with other gases, the pilot flame torch 116 is connected to the mixer 114.

The flashback arrestor 118 is connected to the L.P.G tank 10 so as to prevent the occurrence of a gas explosion when the flashback occurs due to inadvertent use of the L.P.G or wear of parts.

The flashback arrestor 118 is connected to a gas circuit breaker 120 that is operated when the operator has turned on the emergency stop switch over the peripheral equipment, the circuit breaker 120 to detect when the use gas leaks from the gas pipe Gas detector 122 is connected.

Then, the solenoid valve 124 is connected to supply and shut off the L.P.G supplied to the gas circuit breaker 120 by the gas mixer control panel 18.

The solenoid valve 124 is connected with a gas pressure regulating valve 126 which allows the supplied air to pass while maintaining a predetermined pressure.

The gas pressure regulating valve 126 is connected to a mixer 114 that properly mixes air and acetylene.

Meanwhile, the tool unit 16 installed at the tip of the arm 30 of the robot 32 will be described with reference to FIGS. 3 to 5.

First, the base 128 is welded to the distal end of the arm 30, and the cylinder 132 having the rod 130 is fixedly installed at the rear of the base 128, and at the same time the rod 130 is fixed. Board 134 is coupled to the front end of the).

The motor 136 is coupled to the board 134, and a shaft constituting the motor 136 penetrates downward through the board 134, and at the same time, the cam 138 is coupled to the shaft.

In addition, a slider 140 is formed on one side wall of the board 134, and the slider 140 is coupled to move forward and backward to the guide 142 installed in the longitudinal direction on one side wall of the base 128. .

One side wall of the body 144 that flows left and right on the outer circumference of the cam 138 is in contact with, and in contact with the upper surface of the base 128, the axis 146 in the center of the body 128 Are fixedly coupled.

The shaft 146 is coupled to a bearing 148 installed on the upper surface of the base 128.

On the other side wall of the body 144, the front end portion of the buffer spring 150 for elastically pushing the body 144 pushed by the cam 138 is located, the buffer spring 150 is the base 128 It is coupled to the fixing bracket 152 installed on the upper surface of the.

A hose 12 for directing the flow of the mixed gas passing through the flux tank 14 is coupled to the upper portion of the body 144, which is connected to a supply pipe 154 to which the hose 12 is coupled. do.

A gas distribution tank 156 is connected to the distal end of the supply pipe 154 so as to properly distribute the gas to be supplied, and a combustion unit capable of discharging the mixed gas to the front of the gas distribution tank 156. Multiple pipes 158 are coupled.

At the front end of the combustion pipe 158, water is supplied from the outside to circulate and then discharged to the outside, while the mixed gas is burned to absorb and cool the high heat generated at the front end of the combustion pipe 158. The water tank 160 is made to be installed.

At this time, the cooling water hose 162, which is a water passage, is installed at both rear ends of the water tank 160, respectively.

And, a flame temperature sensor 164 is installed on one side of the base 128 to detect the flame temperature generated from the torch lamp 66.

In addition, the front and back wire devices 26 are installed on the support bracket 166 installed on one side of the base 128. The wires 22 are operated before and after the wires 126 and the reverse device 126. A guide tube 168 proximate or spaced apart from the tip portion of the torch lamp 66 is slidably coupled to the support bracket 166.

At the same time, a cooling water hose 170 for cooling the front end of the guide tube 168 heated by the heat generated from the torch lamp 66 is coupled to the front end of the guide tube 168.

The cylinder 172 is coupled to the guide tube 168, and the connector 176 is coupled to the front end of the rod 174 provided in the cylinder 172, and the rod 174 is provided. The cylinder 172 is mounted on the support bracket 166.

And on one side and the other side of the cylinder 172, the first proximity check switch 178 and the wire 22 to check the position when the wire 22 is located at the tip of the torch lamp 66, Each of the reverse diagnosis proximity check switches 180 may be installed to check the position spaced apart from the torch lamp 66.

On the other hand, the wire supply unit 24 that can supply the wire 22 to the guide tube 168 will be described in Figure 6 as follows.

First, the winding roll 182 wound around the wire 22 is rotatably coupled to the support 184, and the wire 22 drawn out from the winding roll 182 is coupled to the guider 186 by a housing ( 188) is installed to pass through.

In this case, a wire sensor 190 is installed to detect an end of the wire 22 supplied in the housing 188, and simultaneously drives a drive 192 for advancing the wire 22. The motor 194 is installed.

In addition, a speedometer 196 configured to set a supply speed to the driving motor 194 is connected.

In addition, a digital timer is installed in the control unit 28. The digital timer sets the working time so that the torch lamp 66 can properly preheat and postheat the welded part.

Unexplained reference number 42a: door panel 42b: frame

Referring to the operation of the present invention configured as described above are as follows.

First, when compressed air is supplied from the automatically operated air compressor 8, the air passes through the pressure regulator 106 which is set to pass by a predetermined pressure, and at the same time by the gas mixer control panel 18 The supplied air passes through the open solenoid valve 108.

At this time, the air supplied along the line passes only the air maintaining only a constant pressure by the air pressure sensing switch 110 to reach the mixer 114 through the air pressure control valve 112.

At the same time, the gas supplied from the LPG tank 10 is passed through the flashback arrestor 118 to the gas blocker 120, where no gas is detected in the gas detector 122 due to the outflow of gas in the workplace or the workplace Only when the situation is difficult to work within does not pass through the gas circuit breaker 120 is opened.

Subsequently, the L.P.G gas reaches the mixer 114 through the open solenoid valve 124 and the gas pressure regulating valve 126.

At this time, in the mixer 114, the air and the L.P.G gas are properly mixed to reach the pilot flame torch 116.

The attained mixed gas is ignited in the pilot flame torch 38 by the ignition coil, which is not shown. At this time, the ignition sensor 40 detects the ignition state and the gas mixer control panel 18. Pass that information on.

In addition, when gas is supplied from the acetylene tank, the supply pressure is displayed in an analog form while passing through the primary pressure gauge 72 and simultaneously flows into the compensation tank 74.

As described above, the gas introduced into the compensation tank 74 passes through the primary pressure regulator 76 set so that the gas is supplied at a constant pressure, and the pressure of the supplied gas is in the form of an analog primary pressure gauge 78 ) Is displayed.

In addition, the gas passes through the flashback arrestor 80 and the gas circuit breaker 82, wherein the gas is opened only when there is no leakage of gas in the workplace or when it is difficult to work in the workplace. It passes through the breaker 82.

Subsequently, the gas is filtered while the impurity contained therein passes through the gas filter 86 and simultaneously passes through the open gas pressure switch 88 to open the solenoid valve 90 opened by the gas mixer control panel 18. Will pass.

In addition, since the brazing welding length and the welding part gas conditions are not constant, the A-line 104 and the B-line 106 are installed so that the selection of the gas conditions can be changed. Is as follows.

First, the gas passing through the solenoid valve 90 is displayed in an analog form while passing through the secondary pressure gauge 94, and at the same time, the amount of gas passing through the secondary gas regulator 94 is adjusted.

Then, the gas supplied passes through the flow meter 96 while the gas flow rate required for combustion is adjusted, and at the same time, the amount of gas passing through the flow meter 96 is displayed on the digital meta 98.

Subsequently, the supplied gas passes through the open solenoid valve 100 and passes through the flux tank 14.

Meanwhile, the acetylene gas passing through the B line 106 is the same as the order of the gas passing through the A line 104.

Acetylene gas passing through the flux tank 14 passes through the flashback arrestor 102 and reaches the torch lamp 66.

At the same time, the oxygen supplied from the oxygen tank 4 passes through the primary main pressure gauge 46 and the supply pressure appears in analog form, and at the same time, passes through the primary pressure regulator 48.

At this time, the supplied oxygen passes through the primary pressure regulator 48 which is set to be supplied at a constant pressure, and the pressure of the supplied oxygen is displayed on the primary pressure gauge 50 in analog form.

Subsequently, the oxygen passes through the oxygen pressure sensing switch 52 to be adjusted to the proper pressure and passes through the open solenoid valve 54.

Subsequently, since the brazing welding length and the welding part gas condition are not constant, the order of passing through the divided A line 68 and the B line 70 to enable the change of the use gas condition selection will be described as follows.

First, the oxygen passed through the solenoid valve 54 is passed through the secondary pressure gauge 56, the pressure state is displayed in an analog form, and at the same time passes through the secondary gas regulator 58, the amount of oxygen is adjusted.

Then, the supplied oxygen passes while the gas flow rate required for combustion is adjusted while passing through the flow meter 60, and at the same time, the oxygen passing through is displayed on the digital meta 62.

Subsequently, the supplied oxygen passes through the open solenoid valve 64 to reach the torch lamp 66.

Meanwhile, the air passing through the B line 70 is the same as the order of the oxygen passing through the A line 68.

The oxygen thus supplied reaches the torch lamp 66.

The acetylene and oxygen supplied as described above reaches the torch lamp 66 to be combusted.

First, the supply is made along the hose 12 in a state where acetylene and oxygen are mixed, and the gas is divided into a combustion pipe 158 that reaches the gas distribution tank 156 and is coupled to the outside.

At this time, the arm 30 of the robot 32 is operated by the control unit 28 to position the tip of the torch lamp 66 on the pilot flame torch 38.

This causes the mixed gas discharged through the torch lamp 66 to be ignited by the ignited pilot flame torch 38.

When the torch lamp 66 is ignited as described above, the control unit 28 transmits the operation command to the robot 32 again so that the arm 30 faces the door 42 which is the welding work position.

At this time, the flame generated through the front end of the torch lamp 66 is directed between the door panel 42a and the frame 42b, which are welding positions.

When the flame heats the welding site, the motor 136 is operated at the same time to rotate the cam 138, which causes the eccentric cam 138 to push the side of the body 144 in one direction The body 144 is rotated about the axis 146.

The body 144 pushed to one side is rotated while pressing the buffer spring 150 located on the other side, when the external force applied to the body 144 by the continuous rotation of the cam 138 is released, the compressed buffer spring ( Repulsing 150 returns one side of the body 144 to its original position.

By repeating this process, the torch lamp 66 flows while maintaining a constant angle.

At this time, the temperature is increased by heating the combustion pipe 158 forming the flame at the front end, and the heated portion is cooled by water supplied to the water tank 160 through the cooling hose 162. Is done.

The flame is preheated over the entire surface of the welding site, and when the temperature of the preheating portion reaches the brazing temperature (820 ° C. to 870 ° C.), the flame temperature sensor 164 detects this to the control unit 28. It will pass that information.

For this reason, the control part 28 advances the rod 174 by operating the cylinder 172 which comprises the wire forward and backward apparatus 26 based on the obtained information.

Accordingly, the connector 176 advances the guide tube 168 by the advancing rod 174, whereby the guide tube 168 is moved to slide at the upper end of the support bracket 166, the wire 22 ) Are advanced together and placed in the preheated welded portion.

At this time, the movement range of the guide tube 168 is limited by the first proximity check switch 178 installed in the cylinder 172, the wire 22 is supplied at the same time the torch lamp 66 It melts and fuses to a welding part.

When the wire 22 is melted as described above, the drive motor 194 constituting the wire supply unit 24 is operated at the same time to advance the wire 22 by operating the drive 192, from the take-up roll 182 The wire 22 is taken out.

The feed rate of the wire 22 is fed at the speed set in the speedometer 196.

When the wire 22 to be supplied is welded at the welded portion, the control unit 28 operates the cylinder 172 to reverse the guide tube 168. The reverse range is limited by the proximity check switch 180.

In the process of melting the wire 22 as described above, the tip of the guide tube 168 is heated by the heat transmitted from the torch lamp 66, wherein the tip is heated by water circulating the cooling water hose 162. Is cooled.

In addition, when the wire 22 is spaced apart from the welded portion, the torch lamp 66 continuously heats for the time set in the digital timer to improve the wettability of the welded portion.

When the welding operation is completed as described above, the arm 30 of the robot 32 advanced from the control unit 28 is reversed to return to the initial position.

On the other hand, when the range of the welded part appears differently according to the characteristics of the work product, the cylinder 132 installed on the base 128 is moved to move the board 134, wherein the slider 140 guides 142. Forward or backward along).

As described above, when the board 134 moves, the position of pressing the one side of the body 144 is changed, whereby the rotation angle of the body 144 is changed around the axis 146. .

As described above, the present invention has the effect of suppressing the generation of tempo collar by appropriately preheating when welding thin plate panels, and improving paintability, and uniformly and completely welded parts. By doing so, a beautiful appearance can be achieved, and at the same time, productivity is increased due to the automated welding operation.

Claims (13)

The base 128 is coupled to the tip of the arm 30 of the robot 32, and the torch lamp 66 is installed to flow from side to side on the base 128, and the torch lamp 66 is left. , The motor 136 is coupled to the cam 138 to provide an external force to flow to the right, and the wire 22 to the front end of the torch lamp 66 while being installed on one side of the base 128 A gas brazing robot system consisting of a wire forward and reverse device (26) for guiding supply in close proximity. 2. The motor of claim 1, wherein the motor 136 is coupled to the board 134, and the slider 140 is formed on one side of the board 134, and at the same time the slider 140 is on one side of the base 128. Gas brazing robot system that is coupled to be installed to slide in the guide 142 is installed in the longitudinal direction at the end. The left and right torch ramp 66 is fixed to the shaft 146 to the body 144 is configured, the shaft 146 is installed on the base 128 A gas brazing robotic system coupled to a bearing (148) to be rotated. 4. The combustion pipe (158) according to any one of claims 1 to 3, wherein a supply pipe (154) for inducing a flow of a mixed gas is coupled to the body (144). ) Is coupled to the gas brazing robot system is installed at the front end of the water tank 160 to cool the overheated combustion pipe (158). 5. The gas distribution tank 156 of claim 4, wherein a plurality of combustion pipes 158 are coupled to the distal end of the supply pipe 154, and the gas distribution tanks 156 can evenly distribute the gas supplied to the combustion pipe 158. Gas brazing robot system is installed. According to claim 2, wherein the motor 136 is coupled to the board 134 is provided with a cylinder 132 to provide an external force to be transferred back and forth along the guide 142, the cylinder 132 A gas brazing robot system in which a tip of a rod (130) is coupled to the rear of the board (134). According to claim 1, wherein the wire before and backward device 26 is coupled to the guide tube 168 so as to slide on the support bracket 166, the external force is applied to the guide tube 168 to move back and forth. A gas brazing robot system coupled to provide a cylinder (172). 8. The gas brazing robot system of claim 7, wherein first and second proximity check switches (178, 180) are provided in the cylinder (172) to define a position when the guide tube (168) moves back and forth. 8. The wire supply unit 24 according to claim 7, wherein the wire supply unit 24 is configured to supply the wires 22 to the wire forward and backward devices 26. The wire supply unit 24 includes a winding roll 182. A gas brazing robot system installed with a drive (192) coupled with a drive motor (194) to draw and supply wires (22) from the drive. According to claim 7, Coupling the cooling water hose 170 to the tip of the guide tube 168, Cooling the tip overheated by the heat transmitted from the torch lamp 66 by the coolant hose 170 Gas brazing robot system 10. The gas brazing robot system according to claim 9, wherein a speedometer (196) is installed to set the rotational speed to the driving motor (194) and adjust it according to the working environment. 10. The gas brazing robot system according to claim 9, wherein a wire detection sensor (190) is installed to detect the supply of the wire (22) drawn out from the take-up roll (182). The flame temperature sensor 190 is installed on the base 128 so as to sense heat transmitted from the torch lamp 66, and obtained from the flame temperature sensor 190. Gas brazing robot system is provided with a control unit 28 to operate the wire forward and backward devices 26 based on the information.