JPH11123550A - Welding equipment with welder gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve adjusting operation to meet a welding condition and to improve welding efficiency by means of making welding work easy, by providing a holding part which is united to a case with a power cable and a gas tube, passing gas through the interior of a spindle and utilizing a clearance which is formed by a chuck and a welding rod as a gas passage. SOLUTION: A holding part 1b which is united to a case 1 is provided with a gas tube 5, cables 4, 3 and 6 each for general power source, welding and remote operation control signal which are contained in a comprehensive cable 2 from a welding source device. A spindle 17 to which the rotation of a motor 8 having a driving gear 9 is transmitted and with which welding electric power and gas are supplied is provided in a case 1 and a chuck 10 is provided at the outer edge of the same. A hollow part through which shield gas is passed is provided in the spindle 17 and a gas tube is fitted with clearance on the edge side of the same and a gas passage through which the shield gas is led to the outer edge along a welding rod 40 is formed in the chuck 10. One hand welding becomes easy to perform, seeing becomes easy as the diameter of the chuck is small, and the holding part is easy to hold thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus with a welder gun for overlay welding for repairing metal surfaces of various machine parts and instruments used in industries such as civil engineering, iron and steel, mining, and railways.

[0002]

2. Description of the Related Art As a conventional welding apparatus with a welder gun for overlay welding by manual welding, the following two types are used. One is an operation control unit provided in a welding power supply device, and a welder gun is connected to the welding power supply device via a welding cable. The other is a welding power supply device and a welding cable, a remote control device. Are provided, and an output control operation unit is provided in this remote operation device.
The latter conventional example will be described with reference to FIGS. 9 and 10. FIG.
Reference numeral 60 denotes a gas cylinder, 61 denotes a welding power supply device, 62 denotes an AC cord to a commercial power supply, 63 denotes a main body operation display unit, B denotes a welder gun, and 65 denotes a power cable 77 and a gas tube 67 for welding and a motor. An integrated cable 86, a weldable power selector switch, 68 a remote control cable, 83 a remote control device, 69 a work gripper, 70 a work member, 71 a ground cable, and 72 a welding rod. Show. Welder gun B is shown in FIG.
As shown in the figure, the power cable 77 and the gas tube 6 are connected again by the welder gun B with the integral cable 65.
7, is guided into the cover cylinder 75 from the case 74 along the surface of the handle 73 of the welder gun B, the motor cable is connected to the motor 76 in the base 74, and the welding cable is a sleeve 79, The gas tube 67 is connected to the output shaft of the chuck 78 and the welding rod 72,
Guided by the sleeve 79, the gas passes from the gas passage 81 formed in the sleeve 79 to the space between the chuck 78 and the cover cylinder 75,
The gas is ejected from the cap 82. (See, for example, JP-A-5-69144 and JP-A-6-69144.
269939)

[0003]

The overlay welding of the prior art is
While rotating the welding rod 72 of the welder gun B, it comes into contact with and repairs the repair surface of the iron work (base material) 70, and the welding rod 72, which is a metal electrode, is continuously melted to form a molten metal and the repair surface is built up. However, most of the welder guns B have a function of welding by hand or a part of the function based on welding conditions set by the remote control device 83 pulled out with another cable. Things. Therefore, when changing welding conditions or making fine adjustments, reach the main body operation display 63 away from the work position, or use the welder gun 1
3 had to be released once and the main body operation display 63 had to be operated. In addition, since the power switch 86 is only the welding power supply unit 61, the hand must be extended to the switch 86 each time. For simple operation of turning on / off each switch of the remote control device,
Although there is no problem as far as the left, if the adjustment knob is used to set delicate welding conditions, the remote control device 83 and the welder gun B must be separately operated. In particular, when working at a high place, it is difficult to operate the welder gun B together with the remote operation control device 83, which significantly reduces the work efficiency. Further, in the case where the adjustment knob 85 is provided on the handle 73, it is difficult to provide a plurality of the knobs on the narrow handle 73, and even if it is provided, it becomes complicated, and there is a risk of malfunction. To adjust the adjustment knob 85 during the operation requires some skill. Welder gun B with adjustment knob 85
Could not make full use of its functions.

As shown in FIG. 10, a power cable 77 for welding the integral cable 65 leading to the welder gun B, a power cable 77 for the motor, and a gas tube 67 are connected to the welder gun B.
Since the cable extends along the holding portion 73, the cable touches the operator's hand and gets caught, which makes the work difficult.

Also, the gas tube 67 of the welder gun B
The gas passage of the shielding gas led from the welding rod 72 passes through the space between the outer periphery of the chuck 78 that rotates and clamps the welding rod 72 and the cover cylinder 75, and is guided to the tip of the welding rod 72. Since the large-diameter cover cylinder 75 and the cap 82 are close to each other, the work efficiency is further reduced due to obstruction when an operator looks at the tip of the welding rod 72. In particular, it was difficult to aim at a minute welding point. Further, since the gas tube 67 extends along the outside of the case 74, the pain of the gas tube 67 was quick. Further, when the welding rod 72 is welded and shortened by welding, the welding rod 72 is pulled out or replaced. At this time, since the cover cylinder 75 interferes, the chuck 78 is removed.
Each time the welding rod 72 is removed from the hole, the cap 82 must be removed, which reduces the work efficiency of adjusting the amount of projection of the welding rod 72 and replacing the welding rod 72.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to improve an adjustment operation for adjusting welding conditions of a welder gun and to facilitate the welding operation. An object of the present invention is to provide a welding device with a welder gun that enhances the efficiency of a welding operation.

[0007]

In order to achieve the above object, a welding apparatus with a welder gun according to the present invention is provided with a welding power source and a general power source such as a motor power source, which are guided from a welding power source device to a holding part integral with a case. And a cable that supplies
A gas tube that supplies shielding gas from a gas cylinder is provided, and a motor having a drive gear and a welding rod that can move in the axial direction are protruded outward in the case, and the welding rod is rotated and pinched at the outer end. Arrange the electrode chuck to be
In a welding device with a welder gun provided with a spindle for supplying welding power and gas to a welding rod, a hollow portion for passing a shielding gas is formed inside the spindle, and a gas tube is loosely fitted to the inner end side of the hollow portion. A gas passage was formed in the chuck to guide the shielding gas to the outer end along the welding rod.

A cable for supplying welding power and a general power supply such as a motor power supply and a gas tube for supplying a shielding gas from a gas cylinder are provided in a grip portion integral with the case, and a driving tube is provided in the case. A motor having a gear, a welding rod that can move in the axial direction and protrude outward, and an electrode chuck that rotates and clamps the welding rod at the outer end are arranged to supply welding power and gas to the welding rod. In a welding machine with a welder gun equipped with a spindle, a hollow part for passing shielding gas is formed inside the spindle, a gas tube is loosely fitted on the inner end side of the hollow part, and the chuck is shielded along the welding rod. Forming a gas passage leading the gas to the outer end, on the outer surface of the case, at least, set a welding power supply conditions, and provide a control unit for remote operation control to display, In over scan, it provided a CPU for controlling the setting of the welding power supply conditions from the control unit, and a single cable for transmitting and receiving death to the welding power supply apparatus of a command from the CPU in the remote operation control signal.

A cable for supplying welding power and a general power supply such as a motor power supply, and a gas tube for supplying a shielding gas from a gas cylinder are provided in a holding portion integral with the case, and a driving tube is provided in the case. A motor having a gear, a welding rod that can move in the axial direction and protrude outward, and an electrode chuck that rotates and clamps the welding rod at the outer end are arranged to supply welding power and gas to the welding rod. In a welding machine with a welder gun equipped with a spindle, a hollow part for passing shielding gas is formed inside the spindle, a gas tube is loosely fitted on the inner end side of the hollow part, and the chuck is shielded along the welding rod. Forming a gas passage leading the gas to the outer end, on the outer surface of the case, at least, set a welding power supply conditions, and provide a control unit for remote operation control to display, In the base, a CPU for controlling the setting of the welding power supply condition from the control unit, and one cable for transmitting and receiving commands from the CPU to the welding power supply device by a remote control signal are provided. The welding power cable, general power cable, remote control signal cable, and gas tube were put together.

The chuck is provided with a chuck receiving screw which covers the spindle and rotates integrally with the spindle, a chuck case having an inner peripheral slope formed on the inner periphery and having a smaller diameter toward the outer end, and a chuck case. A gas nozzle that projects the welding rod to the outer end integrally or separately, and is slidable on the inner circumferential inclined surface of the chuck case, and the surface at one end in the longitudinal direction is a substantially fan-shaped cross section smaller than the other end, It has an outer peripheral surface that matches the inner peripheral surface of the chuck case when it moves to the small diameter of the chuck case, and two side planes. A gas passage is formed by a chuck pawl for holding at least three coupled welding rods, and a space formed between the welding rod and a side plane of the chuck pawl when the chuck pawl grips the welding rod.

[0011] A welding power supply device that guides a shielding gas from a commercial power supply and a gas cylinder is provided with a main body operation display section for remotely setting welding power supply conditions for the power supply and the shielding gas. The control section has bidirectionality via a control circuit provided in the welding power supply device.

The control unit of the welder gun is provided with a display unit and an operation unit. The display unit displays welding power supply conditions with a step setting level meter.
A push switch for setting welding power supply conditions was provided.

The display section of the control section has at least
At least one setting display required for setting welding conditions is provided.

The display section of the control section forms a frequency setting display, a capacitor number setting display, and a motor speed setting display by displaying a plurality of strip-shaped LED lamps arranged thereon. A display and a power voltage switching display are displayed, and each operation unit is formed by a push switch.

The display unit sets an initial value when the power is turned on to an average value or a maximum value.

[0016]

[Function] In the welding work, hold the handle with one hand, and with the other hand,
Welding to the work can be performed in a position that supports the periphery of the case opening and facilitates welding. When changing the welding power supply conditions during the welding operation, the supply of welding power is adjusted by operating the various pressing switches provided on the case with the other hand.

The gas passes through the inside of the spindle and is injected from the gap of the chuck along the welding rod, thereby shielding the outside air around the welding rod.

When the welding rod rotates and comes into contact with the work, the stored energy supplied from the condenser causes a large current to flow instantaneously due to the contact resistance, Joule heat is generated, and the welding rod is melted and melted into the work.

A welding power cable, a general power cable, a remote control signal cable,
The gas tube and the gas tube were put in a lump, and built in so as not to touch the operator's hand.

The main unit operation display section and the control section of the welder gun have a CPU therein, and are provided with the setting and display of the power and shield gas under the same welding power supply conditions. , The same display is possible.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. The welding apparatus with a welder gun according to the first embodiment of the present invention has the following features. (1) A control unit having a CPU for setting welding power supply conditions therein was provided in the welder gun, and the output of the welding power supply device was controlled by remote control. (2) The gas was passed through the center hollow portion of the spindle of the welder gun, and was guided from the gap of the chuck to the tip of the welding rod. (3) The welder gun and the welding power supply were connected with one comprehensive cable. (4) Welding cable and 5V in one comprehensive cable
An electric wire, a 24V electric wire, a general power supply cable for a remote control transmission / reception cable, and a gas tube were provided. (5) The control unit and the welding power supply unit of the welder gun have a CPU inside, and the control unit and the main unit operation display unit have bidirectionality to display the same information. (6) All operations of the control unit and the main unit operation display unit were performed by pressing switches. (7) The cable for the remote control signal is one transmission / reception cable. (8) The display of the control section and the display of the main body operation display section were indicated by step setting level meters.

Hereinafter, an embodiment of a welding apparatus with a welder gun according to the present invention will be described in detail. In the welder gun A, the case 1 and the handle 1b are formed of an insulating material such as plastic having an integral structure, and a case opening 1a for projecting the welding rod 40 is formed on the lower surface of the case 1. In the handle 1b of the case 1, a general power supply cable 4, a welding cable 3, a remote control signal cable 6, a gas tube 5 and the like are housed in the comprehensive cable 2 from the welding power supply 30. They are arranged separately. In particular, the remote control signal cable 6 is transmitted by one signal line,
Reciprocating transmission of reception is possible. The welding cable 3 is directly connected to the fixed conductive ring 26 on the inner end side of the spindle 17, and the remote operation control signal cable 6 and the general power supply cable 4 are connected to the connector 29 of the circuit board 28 for operation and display unit.
The motor cable 7 is connected to the motor 8 from the circuit board 28 via a connector 29. The gas tube 5 is directly connected to the spindle 17 via an L-shaped tube 37. The fixed conductive ring 26 is arranged in a non-contact manner with the outer diameter of the spindle 17 and is radially arranged so as not to rotate, and is received by the fixed structure 18 of the case 1. The fixed conductive ring 26 is urged by a spring 18a in the thrust direction from the fixed structure 18 side so as to make sliding contact with a power receiving ring 27 fixed to the spindle 17. The welding power flows from the stationary conductive ring 26 to the passive ring 27 that rotates integrally with the spindle 17, and the welding rod 40
Flows to

In the case 1, a spindle 17 for rotating and holding the welding rod 40 is vertically supported on the lower surface so that the welding rod 40 projects out of the case 1 from the lower surface of the opening 1a. Close to the spindle 17, the motor 8
However, the rotation axis of the motor 8 is arranged in a substantially perpendicular relationship (slightly inclined) to the rotation axis of the spindle 17. Between the motor 8 and the spindle 17,
A gear for transmitting the rotation of the motor 8 to the spindle 17 is provided. In this embodiment, the transmission gear is a worm gear 41 which has a gear 19 meshing with the driving gear 9 of the motor 8 at the end by the rotation of the motor 8 and transmits the rotation to the spindle 17, and a rotational power from the worm gear 41. A worm wheel 42 fixed to the spindle 17 for transmission to the spindle 17 at a reduced speed. The spindle 17 forms a hollow portion 25 in the center of the inside through which the shielding gas G passes,
The welding rod 40 is inserted into the outer end of the spindle 17. The inner end of the spindle 17 is L
A tube 37 is connected. At the outer end of the spindle 17, a chuck 10 capable of replacing the welding rod 40, rotating in the same manner as the spindle 17 and rotating and holding the welding rod 40 is provided. The chuck case 13 is turned to adjust the length of the welding rod or replace the welding rod.
Worm gear 41 and worm wheel 4
2, the spindle is locked, and even when the chuck 10 is rotated, the spindle 17 does not follow the chuck 10 and rotates, so that the length adjustment and replacement of the welding rod 40 are facilitated. Motor 8 and spindle 17
Are substantially orthogonal, the direction of the rotation axis of the spindle 17 with respect to the motor 8 can be changed.

The chuck 10 has a chuck receiving screw 11
, Chuck case 12, gas nozzle 13, and three chuck claws 14 sliding on the inner peripheral surface of chuck case 12.
Consists of The chuck receiving screw 11 has a cylindrical shape, and a spindle 17 is inserted into the entire inner peripheral surface thereof, and a screw is engraved so as to be screwed and fixed with a screw engraved on the outer periphery of the end of the spindle 17. I have. The chuck case 12 has an inner end of a large cylinder in which a screw is engraved so that an inner periphery of the inner end is screwed with an engraved screw on the outer periphery of the chuck receiving screw 11,
Formed on the outer periphery of the outer end, the outer end of a small cylinder in which a screw is engraved so as to be screwed with the gas nozzle, and a frustoconical intermediate part integrally formed between the inner end and the outer end. . The inner periphery of the intermediate portion forms an inner peripheral inclined surface 12a having a smaller diameter as going from the inner end to the outer end. The gas nozzle 13 protrudes the welding rods 40 of various diameters, and at the same time, forms an opening 13 a for ejecting the shielding gas G along the outer circumference of the welding rod 40, and has a screw screwed with the chuck case 12 on the inner peripheral part. It is formed with an engraved cap.

As shown in FIG. 6, the inner periphery of the chuck case 12 is slidable on the inner peripheral inclined surface 12a, and has a cross section whose outer end side in the longitudinal direction is smaller than the inner end side. An outer peripheral surface 14a and a side plane 14b which are substantially fan-shaped and slide on the inner peripheral inclined surface 12a.
And a chuck claw 14 for implanting a coil spring 16 between the side planes 14b. In addition, both end surfaces of the chuck claw 14 form a vertical surface with respect to the side flat surface 14 b that comes into contact with the welding rod 40. The chuck jaws 14 are composed of three pieces, and the curvature of the outer peripheral surface 14a is such that the chuck jaws 14
2, the inner peripheral inclined surface 12a is adjusted to the small diameter curvature so that it can slide to the small diameter position on the outer end side. Therefore, FIG.
As shown in FIG.
Has a smaller circumference than the circumference of the large cylinder of the chuck case 12, so that both ends of the chuck claw 14 are spaced from the inner circumference of the chuck case 12. Each side plane 1
The coil springs 16 between 4b urge in the direction of repulsion to separate them from each other. The three chuck claws 14 and the coil spring 16 are annularly connected to each other to act to form a large ring, and always bias the chuck claws 14 in the direction of the arrow in FIG. However, the maximum is up to the inner peripheral surface of the inner end of the chuck case 12. Therefore, the chuck claw 14 does not pinch the welding rod 40 alone. Rather, welding rods 40 of various diameters
There is an opening to facilitate insertion. The reason why the welding rod 40 is sandwiched by the three chuck claws 14 is that the welding rod 40 is put in the chuck case 12 as shown in FIG. 5 (in this case, the welding rod 40 spreads out to facilitate insertion of the welding rod 40). )) The outer end of the spindle 17, which is screwed with the chuck receiving screw 11 and protrudes from the case opening 1a,
The chuck spring 14 of the coil spring 16
Against the urging force, the chuck claw 14 is pressed to the left in the drawing, and the annular shape of the chuck claw 14 shrinks, thereby clamping the welding rod 40. The welding rod 40 is firmly clamped by the chuck claw 14. Is done. In this embodiment, three chuck claws 1
Although the example in which the welding rod 40 is clamped is shown in FIG. 4, at least three check claws are required to clamp the welding rod 40, and four or more pieces may be used if the welding rod 40 can be clamped. .

The chuck claw 14 holding the welding rod 40 is
As shown in FIGS. 7A and 7B, a gas passage 15 excluding the coil spring 16 is formed between the chuck claws 14, and the shielding gas G passes through the gas passage 15. When the diameter of the welding rod 40 is reduced, the chuck claws 14 move closer to each other and move toward the outer end of the chuck case 12, and the space between the side planes 14b of the chuck claws 14 becomes narrower. As the diameter of the rod 40 increases, the space between the side surfaces 14b of the chuck claws 14 increases. The coil spring 16 exists in the space between the chuck claws 14, but does not hinder the passage of the gas G at all. The rod diameter of the welding rod used is 1 to 5 mm. The chuck receiving screw 1 constituting the chuck 10
1, the inner space of the chuck case 12 and the gas nozzle 13 is also a gas passage 15. Chuck 1 for holding welding rod 40
0 and the spindle 17 are made of a material having high thermal conductivity, for example,
It is made of aluminum and copper. Further, the spindle employs a structure in which a hollow portion 25 is formed inside to facilitate passage of gas G and radiate high heat generated during welding.

On the upper surface side of the case 1, a display unit 21 for a control unit 20 to be displayed on the upper surface and a circuit board 28 for an operation unit 22 incorporating a CPU and circuit elements are installed. 4 is a display of the speed setting of the motor 8 for rotating the spindle 17 and adjusts the rotation of the welding rod 40. Reference numeral 46 indicates a selection setting of the number of output capacitors, in which the welding current and the intensity of the welding voltage are set. Numeral 47 indicates the selection setting of the charging / discharging frequency, and sets the number of current radiated during welding per hour. The display unit 21 is a step setting, and the setting state is performed by a level meter that is easy to understand visually. The low setting is one LED lamp and the high setting is 10 or 1 LED lamps.
Light up and display with five. The center 46 is divided into 15 equal parts, and both sides 45 and 47 are divided into ten equal parts. In the lower part of the operation unit 22, the welding power to the welding rod 40 and the welding rod 4
Power / motor power switch 51, which is a switch for opening and closing a welding operation for controlling rotation of 0 and opening and closing of a gas flow.
And a switch 49 for the direction of rotation of the motor, that is, the direction of rotation of the welding rod 40, and a voltage changeover switch 56. A switch 54 for setting the number of rotations of the motor and an increase / decrease of the number of capacitors are provided above the operation unit 22. A setting switch 52 and a frequency increase / decrease setting switch 53 are provided, and each switch is a touch switch 2 which is a push switch.
3, the rotation method was stopped, and all operations were changed to the pressing method to simplify the operation. As for the motor rotation direction switch 49, the sign on the switch indicates left rotation on the left and right rotation on the right. When the switch 49 is pressed once, it rotates right, and when it is further pressed, the rotation direction changes alternately with left rotation. . The initial setting values of the display unit 21 are all average values that are frequently used in a standard manner.
However, it can be set to the maximum value depending on the model. On the circuit board 28 inside the control unit 30 of the welder gun A,
There is a CPU of the control circuit, which has a function of control by a software program.

The case of the welding power supply device 30 is made of metal.
Inside, the CPU 33 and the high-voltage power circuit 5
There are seven. On the front of the case, there is a main body operation display section 31, and there is a power switch 50. Argon gas is supplied from a gas cylinder 35 and commercial power is supplied from an AC cord 38 to the back of the case. The CPU 33 has a function of controlling welding setting conditions, and is the same as the CPU of the control unit of the welder gun A. The high-voltage power circuit 57 has a function of transmitting welding power to the welder gun according to a command from the CPU 33. The CPU 33 controls the internal control circuit from the welder gun A or the main body operation display unit 3.
1 and controls the high-voltage power circuit 57
And the required welding power is supplied to the motor 8 via the welding cable 3 or the number of rotations of the motor 8 to the motor 8 via the general power cable 4 and the motor cable 7. Alternatively, the signal of the set value is displayed on the display unit of the welder gun A via one remote control signal cable 6. The changed rotation speed is commanded to the motor 8. The main unit operation display unit 31 is also provided with a level meter of the same step setting as the display unit 21 of the welder gun A, and the LED lamp 48 is turned on according to the set value. The main body operation display section 31 has the same operation display as the welder gun A, and includes a motor rotation speed setting display, a capacitor number setting display, a pulse frequency setting display, a motor rotation direction display, a power voltage switching setting display, and the like. LE
A main body operation display unit 31 including a D lamp and an operation unit of a push switch for various settings is provided. And
The control section 20 and the main body operation display section 31 have bidirectionality. Although not shown, a power receiving connector for an AC power supply, a gas-filled coupler for receiving gas, and a grill for an air-cooling fan are provided on the back surface. In the figure, 34 is a work gripper, 58
Indicates a carriage, 59 indicates a tool holder, 56 indicates a work table, and 70 indicates a work.

The configuration of the present invention is not limited to the above embodiment. Other examples will be described below. The control unit having the CPU of the welder gun A is indispensable, but an operation for setting the welding power supply condition of the welding power supply,
The display unit may be omitted, and only the control unit of the welder gun A may be set.

The display on the control section and the display on the main body operation display section may be numerical display. Even in this case, LED display is possible.

The control unit 2 of the welder gun A
0 may be provided on the outer surface of the case other than the upper surface of the case 1, for example, on the side surface.

The hollow portion of the shield gas to the spindle has been described as a through hole, but the inner end of the spindle has a bottom and a hole is provided in the side surface on the inner end side so that gas can be introduced from this hole. Is also good.

Although the chuck case of the chuck and the gas nozzle have been described separately, a chuck case in which the gas nozzle is integrally formed may be used as long as the replacement of the welding rod is not hindered.

Next, the operation of the present invention will be described. The shielding gas is opened from the gas cylinder 62 of the argon gas placed on the carriage 58 together with the welding power supply device 30, the gas pressure is adjusted and guided, the AC cord 62 is connected to the commercial power supply, and the power is guided. Then, the ground cable 71 is connected to the work 70 via the work gripper 34, and the power / motor power switch 51 for starting the welding work of the welder gun A is turned on. The LED lamps of the motor speed setting display 45, the condenser number setting display 46, and the frequency setting display 47 of each setting display are displayed as the average value of the preset initial setting position. When the welding power setting condition rises to the average value, the welding operation can be started. However, when the operator further pushes and pushes each of the upper and lower switches of the operation unit 53 to increase or decrease in a stepwise manner and set a desired welding power setting condition, the operator controls the CPU of the control unit 20 to remotely control the instruction. A signal is sent to the welding power supply 30 via the operation control signal cable 6 and the
, The welding power source device 30 sends back the gas, welding power, and motor rotation speed instructions according to the desired welding conditions.
Current to zero, welding rod rotation, motor rotation instruction, and further gas is supplied. The main unit operation display unit 31 of the welding power supply device 30 includes a control unit 2 on the welder gun A side.
The same instruction display as the display unit 21 of 0 is shown.

The gas is decompressed by the pressure reducer from the gas cylinder 35, passes through a flow meter with flow rate adjustment, passes through the solenoid valve of the welding power supply 30 by a gas tube, passes through the coupler and the comprehensive cable 2, and passes through the gas of the welder gun A. From the tube 5, through the L-shaped tube 37, through the hollow portion 25 of the spindle 17, through the gas passage 15 of the chuck claw 14 of the chuck 10, from the gas nozzle opening 13 a of the gas nozzle 13 to the welding rod 40.
Is guided to the tip of.

The welding current is supplied from the commercial power supply to the welding power supply 30.
From the high voltage power circuit 57 in the
The welding power is supplied in accordance with the command of the welding setting condition, and the spring 18 is moved from the fixed conductive ring 26 in the welder gun A.
The fluid flows into the power receiving ring 27 that has slidably contacted at a, and is conducted to the spindle 17, and then flows to the welding rod 40 sandwiched between the chuck claws 14 of the chuck 10. On the other hand, a current flows through the motor 8 and the motor 8 is driven to the rotation speed specified by the set condition command.
42, the spindle 17 is rotated.
The welding rod 40 pinched by the chuck pawls 14 on the outer end side of is rotated as desired. Therefore, as shown in FIG. 8, the welding rod 4 is moved from the chuck pawl 14 of the chuck 10 via the spindle 17.
When the current flows to zero and the tip of the welding rod 40 contacts the workpiece 70 while rotating, a large current flows instantaneously due to the contact resistance of the stored energy supplied from the capacitor, and Joule heat is generated to melt the welding rod 40. Then, it is dissolved in the work 70. The periphery of the welding rod is sealed with gas to prevent oxidation.

Since the chuck 10 and the spindle 17 for holding the welding rod 40 are made of a material having high thermal conductivity, such as aluminum or copper, when the welding rod 40 becomes high in the build-up welding operation, heat is generated. Is dissipated from the spindle 17 to the fixed structure 44 in the case opening 1a. On the other hand, the gas passage 15 of the chuck 10 and the spindle 1
The heat is cooled by the shielding gas G filled in the hollow portion 25 in the inside 7. Therefore, the chuck 10 and the spindle 17 radiate high heat from both the material itself and the gas inside. The case 1 is made of an insulating material made of plastic so that heat is hardly transmitted. Because the conventional welder gun B did not have a sufficient heat radiation effect, the heat generated during welding was
Although only the 0th percentile could be used continuously, the present invention employs a heat dissipation structure, so that it can be used continuously for 2 hours or more.

The length adjustment and replacement of the welding rod 40 are performed by rotating the chuck case 12 of the chuck 10. The spindle 17 meshes with the worm wheel and the worm gear,
It does not rotate with external rotation. When the screw of the chuck case 12 is turned from the spindle 17 (the spindle is locked as described above and does not turn), the spindle 1 is loosened.
The chuck pawl 14 that has been in contact with the coil spring 1
The welding rod 40 is expanded by six forces, and the welding rod 40 that has been held so far is released and comes out. Insert the welding rod 40 into the chuck 10
What is necessary is just to tighten the screw of each part.

The welder gun A of the present invention injects a shielding gas around the welding rod, melts the welding rod by rotating contact of the welding rod, and builds up the welding rod. However, there is a space between the welding rod and the workpiece. When the current is caused to flow by rotating the welding rod, the same phenomenon as in arc welding occurs. Therefore, the present invention can also be used as arc welding.

[0040]

Since the present invention is configured as described above, the following effects can be obtained.

Since the handle is arranged substantially perpendicular to the welding rod, welding work is easy. And since it can be held and welded with one hand so as to hold the periphery of the case opening, welding work is easy and suitable for fine welding work.
Less fatigue. The operator can hold the handle of the welder gun with one hand, and use the other hand to adjust and command each operation unit according to the welding conditions of the display and operation unit provided on the welder gun.
Moreover, the display unit is adjacent to the operation unit, and can be finely adjusted while viewing the display unit with one hand. Also, work at high places can be easily performed. Therefore, the welding conditions can be changed while maintaining the welding posture.

A display and operation unit for setting welding conditions is provided on the outer surface of the welder gun and further on the welding power supply device so that the welding power supply device is bidirectional, so that it can be operated not only on the welder gun but also on the welding power supply device side. Operates similarly. For example, when the upper surface is difficult to operate due to the welding orientation of the welder gun, the control unit of the welder gun can be substituted by operating the main body operation display unit on the welding power supply device side.

Since the chuck covering the welding rod protruding from the opening below the welder gun has a small diameter, it is easy to see, and particularly, overlay welding of a minute welding portion is possible.

Since a control unit having a CPU is provided in the welder gun, control for the set value is performed.
A command can be sent to the welding power supply device via the remote control signal cable. This cable is capable of transmitting and receiving digital signals in a single line and is not bulky.

Since each cable and the gas tube were formed into a single comprehensive cable, they did not become entangled with the operator's feet during the welding operation, and the danger was extremely reduced.

Since the rotation directions of the motor and the spindle are substantially orthogonal to each other, the rotation direction can be changed, the arrangement in the case is facilitated, the thickness of the case can be reduced, and the degree of freedom in design can be obtained.

Since there is only one comprehensive cable, it does not get in the way. Furthermore, since the cables and tubes in the comprehensive cable are provided inside the handle of the welder gun, there is no danger of being caught or touched during the operation.

Since a heat conductive material is used for the chuck and the spindle, and the gas is passed through the internal hollow portion and the gas passage, the heat radiation effect is remarkable.

The display section of the control section and the main body operation display section of the welding power supply unit are visually easy to see and the setting judgment is easy. Also, since the operation unit is a touch switch, it is easy to issue a command.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of the inside of a welder gun of the present invention seen through.

FIG. 2 is an overall perspective view of a welding device with a welder gun according to the present invention.

FIG. 3 is a general center cross-sectional view of FIG.

FIG. 4 is an overall perspective view as viewed from a control unit side in FIG. 1;

FIG. 5 is a longitudinal sectional view of the chuck of the present invention.

FIG. 6 is an overall perspective view of one chuck claw of the present invention.

7A is a sectional view taken along the line II of FIG. 5, and FIG. 7B is a sectional view taken along the line II-II of FIG.

FIG. 8 is a partial cross-sectional view for explaining welding to a work in the welder gun of the present invention.

FIG. 9 is an overall perspective view of a conventional welding device.

FIG. 10 is a partially cutaway perspective view of a conventional welder gun.

[Explanation of symbols]

 A Welder gun 1 Case 1a Case opening 1b Handle 2 Comprehensive cable 3 Welding cable 4 General power supply cable 5 Gas tube 6 Cable for remote operation control signal 7 Motor cable 8 Motor 9 Drive gear 10 Chuck 11 Chuck receiving screw 12 Chuck case Reference Signs List 12a Inner peripheral inclined surface 13 Gas nozzle 14 Chuck claw 14a Outer peripheral surface 14b Side plane 15 Gas passage 16 Coil spring 17 Spindle 20 Control part 21 Display part 22 Operation part 23 Press switch 25 Hollow part 26 Fixed conductive ring 27 Power receiving ring 28 Circuit board 30 Welding power supply unit 31 Main unit operation display unit 33 CPU 40 Welding rod 45 Motor rotation number setting display 46 Capacitor number setting display 47 Frequency setting display 49 Motor rotation direction display 57 High voltage power rotation Road

Claims (9)

[Claims] 1. A cable that guides from a welding power supply and supplies general power such as welding power and a motor power, and a gas tube that supplies shielding gas from a gas cylinder are provided in a holding part integrated with the case. , A motor having a drive gear, and an electrode chuck that allows the welding rod to move in the axial direction and protrude outward, and at the outer end, an electrode chuck for rotating and holding the welding rod, is used to supply welding power and gas to the welding rod. In a welding device with a welder gun provided with a supply spindle, a hollow portion for passing shielding gas is formed inside the spindle, a gas tube is loosely fitted to the inner end side of the hollow portion, and the chuck is placed along the welding rod. Characterized by forming a gas passage for guiding a shielding gas to the outer end by welding. 2. A cable for guiding welding power and a general power supply such as a motor power supply, and a gas tube for supplying a shielding gas from a gas cylinder are provided in a grip portion integral with the case and provided in the case. , A motor having a drive gear, and an electrode chuck that allows the welding rod to move in the axial direction and protrude outward, and at the outer end, an electrode chuck for rotating and holding the welding rod, is used to supply welding power and gas to the welding rod. In a welding device with a welder gun provided with a supply spindle, a hollow portion for passing shielding gas is formed inside the spindle, a gas tube is loosely fitted to the inner end side of the hollow portion, and the chuck is placed along the welding rod. Forming a gas passage for guiding the shield gas to the outer end, and at least on the outer surface of the case, a control unit for remote operation control for setting and displaying welding power supply conditions, A CPU for controlling the setting of welding power supply conditions from the control unit and a single cable for transmitting and receiving a command from the CPU to the welding power supply device by a remote control signal are provided in the case. Welding machine with welder gun. 3. A cable integrated with the case and provided with a general power source such as a welding power source and a motor power source, and a gas tube for supplying a shielding gas from a gas cylinder are provided in the case. , A motor having a drive gear, and an electrode chuck that allows the welding rod to move in the axial direction and protrude outward, and at the outer end, an electrode chuck for rotating and holding the welding rod, is used to supply welding power and gas to the welding rod. In a welding device with a welder gun provided with a supply spindle, a hollow portion for passing shielding gas is formed inside the spindle, a gas tube is loosely fitted to the inner end side of the hollow portion, and the chuck is placed along the welding rod. Forming a gas passage for guiding the shield gas to the outer end, and at least on the outer surface of the case, a control unit for remote operation control for setting and displaying welding power supply conditions, A CPU for controlling the setting of welding power supply conditions from the control unit and one cable for transmitting and receiving commands from the CPU to the welding power supply device by a remote control signal are provided in the case. A welding device with a welder gun, wherein a power cable, a general power cable, a cable for remote control signals, and a gas tube are collectively inserted. 4. A chuck, comprising: a chuck receiving screw for externally attaching a spindle and rotating integrally with the spindle; a chuck case having an inner peripheral slope formed on an inner periphery and having a smaller diameter toward an outer end; A gas nozzle that projects a welding rod at the outer end of the case or integrally with the case, and a slidable inner circumferential inclined surface of the chuck case, with a substantially fan-shaped cross section whose one end in the longitudinal direction is smaller than the other end. An outer peripheral surface that coincides with the inner peripheral surface of the chuck case when the chuck case is moved to the small diameter of the chuck case, and a two-sided flat surface. And a space formed between the welding rod and the side surface of the chuck claw when the chuck claw holds the welding rod. Claim 1 characterized by the following: The welding device with a welder gun according to claim 3. 5. A welding power supply device that guides a shielding gas from a commercial power supply and a gas cylinder is provided with a main body operation display unit for remotely setting welding power supply conditions, and controls the main body operation display unit and the welder gun. With the department,
The welding device with a welder gun according to any one of claims 2 to 4, wherein the welding power source device has a bidirectional property via a control circuit provided in the welding power source device. 6. A display unit and an operation unit are provided in a control unit of the welder gun, the display unit displays welding power supply conditions by a step setting level meter, and the operation unit sets welding power supply conditions. The welding device with a welder gun according to any one of claims 2, 3 and 5, wherein the welding device is a press switch for performing the operation. 7. The control unit according to claim 2, wherein the display unit of the control unit is provided with at least one setting display required for setting the welding power condition. Or welding equipment with a welder gun as described above. 8. A display section of the control section forms a frequency setting display, a condenser number setting display, and a motor rotation speed setting display by a display in which a plurality of strip-shaped LED lamps are arranged, and further includes a motor rotation direction. 5. A switching display, a power on / off display, a power voltage switching display and the like are displayed, and each operation unit is formed by a press switch. Item 8. The welding device with a welder gun according to any one of Items 6 and 7. 9. The display unit according to claim 2, wherein an initial set value when the power is turned on is set to an average value or a maximum value. The welding device with a welder gun according to claim 8.