KR100943771B1 - A wire-feeder for welding machine wiht gas flow-meter unit - Google Patents

Abstract

PURPOSE: A wire-feeder for a welding machine with a flow-meter unit is provided to easily control a flow rate, and to effectively prevent unnecessary gas leak. CONSTITUTION: A wire-feeder for a welding machine with a flow-meter unit comprises a main body frame, a solenoid valve, and a control box. A flow-meter unit(200) is arranged in the control box. The flow-meter unit comprises a metal flow-meter block(210), an inner pipe(220), an outer pipe(240), a fastening ring, and a needle valve(260). The metal flow-meter block has an inlet bore(211), an orifice(212), a valve bore(213), an outlet bore(214), a gas circulation space(215), a gas inlet(216), a gas outlet(217), and a pipe coupling unit(218). A sphere body(230) is arranged inside of the inner pipe, and the outer pipe is installed in the top end of the pipe coupling unit. The fastening ring is coupled to the outer surface of the pipe coupling unit of the flow-meter block.

Description

Wire feeder for welding machine with flow meter unit {A WIRE-FEEDER FOR WELDING MACHINE WIHT GAS FLOW-METER UNIT}

The present invention relates to a wire feeder for welders, and more particularly, to a wire feeder for welders having a flow meter unit that can be adjusted while visually checking the flow rate supplied from the welding gas storage tank side to the welding torch side.

Generally, the welding machine used in the industrial field contacts and applies the welded parts to the molten state by using heat sources such as gas, arc, electricity, resistance heat, and frictional heat, and the heated member or the member at room temperature. There are those which are joined together by applying pressure to the members based on the applied voltage.

Among these welders, a gas welder using a welding gas such as argon gas or carbon dioxide gas is most commonly used in manufacturing steel structures, ships, automobiles, and the like; This includes a storage tank in which welding gas (argon gas or carbon dioxide gas, etc.) is stored, a regulator disposed at the outlet side of the storage tank to allow the gas to flow at a constant pressure, an outlet side of the regulator and a gas hose (usually It consists of a flexible rubber hose) and a wire feeder (aka wire feeder) equipped with a solenoid valve for supplying a welder body to which various electric appliances are placed, and welding wire wound on a bobbin and controlling gas supply. ), The wire is electrically connected through the feeder and the control cable, and a switch for controlling the solenoid valve is provided, and the welding torch is supplied with gas, and the base cable is electrically connected to the main body of the welding machine and connected to the base material.

Therefore, in the conventional gas welding machine, when the base cable is connected to the base material as the welding target and the welding wire on the welding torch side is contacted, the welding wire is melted by different electrical characteristics, thereby performing welding. In addition, when welding starts while the welding wire is melted, a welding gas (argon gas or carbon dioxide gas) is ejected from the welding torch to form a fence, thereby preventing contact between the welding progress portion and external air. Therefore, a beautiful welding bead can be obtained, and unlike arc welding, since there is no coating, the back finishing is simple and clean.

On the other hand, the welding gas blowing of the gas welder is made while the operator presses the switch of the welding torch while the solenoid valve is opened. When the operator releases the switch, the solenoid valve is immediately turned off to cut off the welding gas. In addition, the welding gas discharge flow rate is controlled through the regulator provided on the storage tank side according to the working environment (work conditions and objects) while performing the welding operation.

However, in the conventional gas welder, since the regulator is mounted on the side of the storage tank far from the actual work place, there is a disadvantage in that it is cumbersome to control the welding gas discharge flow rate as the operator comes and goes each time. Therefore, at the work site, it is frequently used to set the opening degree of the regulator higher than the proper blowing pressure.In this case, whenever the operator opens the solenoid by pressing the switch of the welding torch, the gas is suddenly blown out at a large pressure for several seconds. For this reason, there is a disadvantage in that considerable welding gas is wasted.

The high pressure jet phenomenon of the welding gas proceeds for more than 5 seconds in a severe case for 2 to 3 seconds during which a large amount of gas filled with the high pressure is discharged from the gas hose, and the gas waste due to the high pressure jet is connected to the storage tank and the welding main body. The longer the length, the more severe the occurrence. In addition, instantaneous high pressure gas ejection has a problem of adversely affecting the deposited metal to cause welding defects.

The present invention is to solve this problem; An object of the present invention is equipped with a flow meter unit that can be adjusted while visually confirming the flow rate supplied from the welding gas storage tank side to the welding torch side to the wire feeder to which the welding torch is connected, so that the operator can easily adjust the flow rate. It is to provide a welder wire feeder with a flow meter unit that can effectively prevent unnecessary gas leakage through.

In addition, another object of the present invention is to provide a wire feeder for a welder having a flow meter unit that can facilitate its use by embedding the flow meter unit in the control box of the wire feeder.

The present invention for achieving this object is; A control cable extending from the welding main body and a gas hose connected to the gas storage tank side are connected to the welding torch, and the main frame is equipped with a pulley and a feeding motor for automatically feeding the welding wire to the welding torch, and at the welding torch side. A welder wire having a solenoid valve for opening and closing the middle of the gas hose in accordance with a switching operation, and a control box provided at a front portion of the main frame and an operation knob for adjusting current and voltage values applied to the welding torch. In a feeder;

The control box includes a box body which is made up of an open front body and is installed to stand on the front part of the main body frame, and is arranged to cover the open front part of the box body and the operation knob is installed;

The box body of the control box is characterized in that the flow meter unit for checking the gas flow rate discharged to the welding torch side when the solenoid valve opening operation.

In addition, the present invention is the flow meter unit; The rear side is bored to be connected to the gas storage tank side inlet is provided, the inlet bore is provided with an orifice perforated at the bottom, the front facing the inlet bore is in communication with the inlet bore through the orifice A valve bore is provided, and an outlet bore is formed in the side portion of which the gas hose connected to the welding torch side is directly connected to the bore, and a gas flow space is formed in the upper surface of the valve bore. The gas inlet connected to the bottom side is drilled, and the gas outlet passage connected to the outlet bore is drilled to the bottom edge side, and a pipe threaded part is formed on the outer circumference, and is mounted on the box body bottom of the control box. A metal flow meter block; An inner tube installed at a central portion of the bottom of the pipe joint of the flowmeter block so as to communicate with the gas inflow path, and having a sphere disposed therein and having an open top; An outer tube installed at an upper end portion of the tube coupling part while surrounding the inner tube and guiding the gas discharged through the inner tube to exit to the gas discharge path; A fastening ring coupled to the outer circumference of the pipe of the flowmeter block by a screw coupling method to fix the lower end of the outer tube to the end of the pipe of the flowmeter block; A needle valve disposed on the tip of the flowmeter block, the needle valve of which a tapered shape needle is arranged to move forward and backward in the valve bore of the flowmeter block and adjusts the opening degree of the orifice; .

In addition, the present invention is the needle valve; A coupling-bolt member mounted to the valve bore end in a screwing manner to allow a female screw hole to penetrate therein; A valve rod having a central portion coupled to the female threaded hole of the coupling-bolt member by a screw coupling method to move back and forth and having the needle at a distal end thereof; An operation wheel provided at a rear end of the valve rod to rotate the valve rod in a forward and reverse direction; .

The present invention also provides The inner tube and the outer tube can be seen from the outside, and the opening is formed in the box cover of the control box so as to operate the operation wheel from the outside.

The present invention also provides The gas test switch for temporarily opening the solenoid valve for checking the flow rate through the flow meter unit is characterized in that disposed on the box cover of the control box.

According to the wire feeder for welders with a flow meter unit according to the invention; Since the flow meter unit is mounted on the control box of the wire feeder to which the welding torch is directly connected, it is not only convenient to use, but also has an effect that can be easily adjusted while visually checking the degree of gas discharge. Gas leakage is also prevented, so gas savings are also an excellent advantage.

Further, according to the wire feeder for welders with a flow meter unit according to the present invention; The solenoid valve which controls the gas supply from the gas storage tank to the welding torch side can be operated through the gas test switch provided in the control box, so that the welding gas discharge flow rate can be easily visually checked without operating the switch of the welding torch. There is an advantage that can be set.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. (The present invention is applied to a wire feeder of a gas welder system using a high pressure gas, and the present invention can be applied for convenience of understanding. The configuration of the wire feeder with flow meter unit according to the present invention after the configuration of the gas welder system in which

<Description of gas welding machine system to which the present invention is applied>

As shown in FIG. 1, the welding machine system to which the present invention can be applied includes a storage tank 10 in which a high-pressure welding gas (argon gas or carbon dioxide gas, etc.) is stored, and an opening / closing valve 11 is provided at an upper portion thereof. A welding main body 30 connected to the on / off valve 11 side of the tank 10 through the gas hose 20 and an overload circuit breaker 40 for supplying power to the welding main body 30 and automatically shut off when overloaded. NFB; No Fuse Breaker), a welding torch 60 connected through the welding main body 30 and the control cable 50, and a base cable electrically connected to the welding main body 30 and connected to the base material as a welding target ( 70).

In addition, in the middle of the control cable 50 connecting the welding main body 30 and the welding torch 60 together with the gas hose 20, a solenoid valve for feeding the welding wire to the welding torch 60 and controlling the gas supply ( The wire feeder 100 on which the 120 is disposed is disposed. The solenoid valve 120 disposed on the wire feeder 100 opens and closes the middle of the gas hose 20 by a switch 61 (composed of a push switch) provided in the welding torch 60.

Therefore, when the worker touches the welding wire on the welding torch 50 side to the base material (welding object) while pressing the switch 61 provided in the welding torch 60, the welding wire of the base cable 70 side and the welding torch 60 is pressed. The welding is performed while the welding wire is melted due to different electrical characteristics of and. In addition, the solenoid valve 120 is opened according to the push operation of the switch 61 of the welding torch 60 so that the welding gas of the storage tank 10 is supplied through the gas hose 20. The gas is blown radially through the gas vent to form a fence. Such a gas fence is able to obtain a beautiful welding bead by blocking the contact between the site where the welding proceeds and the external air.

When the welding worker releases the switch 61 while separating the welding torch 60 from the base material as the welding target, the solenoid valve 120 of the wire feeder 100 is closed to cut off the welding gas supply. As such, the ejection of the welding gas is performed while the operator presses the switch 61 provided in the welding torch 60 while the solenoid valve 120 is opened. When the switch 61 is released, the solenoid valve 120 is momentarily closed. The welding gas ejection is blocked.

Description of Wire Feeder Configuration with Flow Meter Unit According to the Present Invention

On the other hand, as shown in Figure 2, the wire feeder 100 according to the present invention is disposed in the middle of the control cable 50 consisting of the electrical wiring and the gas hose 20 is integrally welded together with the welding torch 60 It is configured to be used by detachably connecting to the main body 30; This is the main frame 110 is made by bending the pipe to form an outer shape, and the pulley 130 and the feeding motor mounted on the main frame 110 to automatically feed the welding wire 131 to the welding torch 60 side ( 140), the solenoid valve 120 for opening and closing the gas hose 20 in accordance with the switching operation on the welding torch 60 side, and the control box 150 for adjusting the current voltage value applied to the welding torch 60 side Equipped. {Description of the opening and closing operation of the solenoid valve 120 mounted on the wire feeder 100 has been described above, so the detailed description thereof will be omitted below.}

The control box 150 of the wire feeder 100 is composed of a box body having an open front surface, and is installed on the front surface of the body frame 110, and is provided with a box body 151 and an open front portion of the box body 151. It is disposed to cover and consists of a box cover 152, the operation knobs 160, 161 for adjusting the current and voltage values are arranged. The box body 151 is preferably installed standing up to about 65 degrees or more from the front portion of the main frame 110, which is a sphere 230 of the flow meter unit 200 to be described later can be raised and lowered smoothly by the operator This is to easily check the scale of the inner tube (220).

The control box 150 is disposed with a flow meter unit 200 for adjusting while visually checking the gas flow rate discharged from the gas storage tank 10 to the welding torch 60 side when the solenoid valve 120 is opened. have.

The flow meter unit 200 according to the present invention is mounted on the control box 150 of the wire feeder 100 to which the welding torch 60 is directly connected. As shown in Fig. 4, the flow meter block 210 having a flow path for outputting the welding gas flowing from the gas storage tank 10 side to the welding torch 60 side and the flow meter block 210 of An inner tube 220 and an outer tube 240 for checking the amount of water discharged through the height of the sphere 230 and a tightening ring for firmly fixing the lower end of the outer tube 240 in the upper surface portion. And a needle valve 260 for adjusting the opening degree of the orifice 212 in the flowmeter block 210.

4 and 5; The flow meter block 210 is processed through a rectangular aluminum block, and is firmly mounted on the bottom side of the box body 151 of the control box 150 through a screw, and the following gas flow path is processed. First, an inlet bore (BORE) inlet bore (211; INLET-BORE) is provided on the rear surface of the flow meter block 210 so as to be connected with the gas storage tank 10 to inlet gas. The orifice 212 is perforated at the bottom of the). The valve bore 213 is formed on the front surface of the flow meter block 210 facing the inlet bore 211 so as to be in communication with the inlet bore 211 through the orifice 212. The bottom of the valve bore 213 is machined in the form of a cylinder, and the open end is machined in the form of a female threaded hole. In addition, an outlet bore 214 (OUTLET-BORE) in which a gas hose connected to the welding torch 60 side is directly connected to the side portion of the flow meter block 210 is bored. In addition, a gas flow space 215 is formed in the upper surface of the flow meter block 210, but a gas inflow path 216 connected to the bottom side of the valve bore 213 is drilled in the center of the bottom of the flow meter block, and toward the bottom edge thereof. The pipe outlet portion 218 is connected to the outlet bore 214 is made of a pipe coupling portion 218 perforated.

The pipe coupling part 218 is for arranging the inner tube 220 and the outer tube 240, and a male screw is processed on the outer circumference thereof.

4 and 6; The inner tube 220 is placed in the bottom center of the pipe joint 218 of the flow meter block 210 to communicate with the gas inlet 216, the inside of the sphere 230 is disposed and the top is open. . The outer circumference of the inner tube 220 is marked in the longitudinal direction (not shown), which is to check the gas discharge flow rate through the height of the sphere (230).

The outer tube 240 is closed at the top and is installed standing on the top of the pipe coupling portion 218 while wrapping the inner tube 220 at regular intervals, whereby the gas discharged through the inner tube 220 It serves to guide the exit to the gas discharge path (217).

The tightening ring 250 is for fixing the lower end of the outer tube 240 to the tip of the pipe joint 218 of the flowmeter block 210, and is coupled to the outer circumference of the pipe joint 218 by a screw coupling method. In FIG. 4 and FIG. 5, reference numeral 219 denotes an O-ring disposed at the tip of the pipe joint, and is compressed in the process of tightening the tightening ring 250 to seal the lower end of the outer tube 24.

In addition, the needle valve 260 is disposed to move forward and backward in the valve bore 213 of the flow meter block 210, the tapered needle 261 is inserted into the orifice 212 at the tip to directly adjust the opening degree thereof. ) Is provided. That is, the needle valve 260 is mounted to the end of the valve bore 213 by screwing, and has a coupling-bolt member 262 through which the female screw hole 262a penetrates in the axial direction, and the coupling-bolt member. The central portion is coupled to the female threaded hole 262a of the screw hole 262a by a screw-coupling method, and the valve rod 263 is provided with a needle 261 at the tip and the rear end of the valve rod 263. It is integrated by welding means and has a control wheel 264 for manipulating the valve rod 263 in the forward and reverse directions. In FIG. 4 and FIG. 6, reference numeral "265" denotes an O-ring disposed at the outer circumference of the valve rod 263, so that the welding gas flowing through the orifice 212 does not leak to another place. It is intended to be guided only to the side. Therefore, the opening of the orifice 212 is adjusted by the needle 261 as the valve rod 263 is rotated in the forward or reverse direction through the operation wheel 264, thereby adjusting the discharge flow rate of the welding gas.

On the other hand, as shown in Figure 2, the opening 153 is formed in the box cover 152 of the control box 150 so that the operator can easily operate the operation wheel 264. That is, one side of the box cover 152 can see the inner tube 220 and the outer tube 240 of the flow meter unit 200 from the outside, and the opening 153 to manipulate the operation wheel 264 from the outside. Is formed in the longitudinal direction.

In addition, a gas test switch 170 for temporarily opening and closing the solenoid valve 120 is disposed on the box cover 152 of the control box 150 to check the welding gas discharge flow rate through the flow meter unit 200. have. In other words, when the operator artificially presses the gas test switch 170, the solenoid valve 120 is electrically provided to open, and thus the operator is suitable for the working condition without pressing the switch 61 of the welding torch 60. The operation wheel 264 can be operated while visually checking the welding gas discharge flow rate. {In the embodiment of the present invention, the solenoid valve 120 for opening and closing the middle of the gas hose 20 is shown as being disposed on the inlet end side of the flow meter unit 200, as shown in FIG. Even if the solenoid valve 120 is arranged on the outlet end side of the flow meter unit 200, the desired object of the present invention can be achieved.

<Description of Operation of Wire Feeder with Flow Meter Unit According to the Present Invention>

Next will be described the operation of the wire feeder with a flow meter unit according to the present invention configured as described above and the resulting effects.

First, when the operator presses the switch 61 of the welding torch 60 to open the solenoid valve 120; The high pressure welding gas stored in the gas storage tank 10 (gas supply source) passes through the solenoid valve 120 → flow meter unit 200 of the wire feeder 100 and then flows out toward the welding torch 60 through the gas hose. Will go out. Accordingly, the decompression welding gas is stably supplied to the welding torch 60 (use point) side of the welder system while maintaining a constant pressure in accordance with the opening degree of the orifice 212 set in the flow meter unit 200.

That is, when the solenoid valve 120 is opened, in the flow meter unit 200, as shown in FIG. 7, the welding gas is inlet bore 211 → orifice 212 → gas inflow path of the flow meter block 210 ( 216) → the inner tube 220 → the outer tube 240 → the gas discharge path 217 → the outlet to the welding torch 60, while passing through the bore (214), passing through the inner tube 220 here Lift the received sphere 230.

Therefore, the operator can visually check the welding gas discharge flow rate through the height of the sphere 230, and by adjusting the operation wheel 264 in the forward / reverse direction can be adjusted to the opening degree of the orifice (212) according to the working conditions.

After all, since the flow meter unit 200 is mounted on the control box 150 of the wire feeder 100 to which the welding torch 60 is directly connected, the flow meter unit 200 can be easily used by the operator and visually observe the degree of gas discharge. It can be adjusted easily while checking.

On the other hand, to adjust the welding gas discharge flow rate according to the working conditions, the operator does not press the switch 61 of the welding torch 60, the gas test switch 170 provided in the control box 150, the box cover 152, Will be pressed. Therefore, the welding gas is discharged while the solenoid valve 120 is opened, and the welding gas discharge flow rate can be easily adjusted while checking the height of the sphere 230 disposed in the inner tube 220. As such, when the switch 170 for gas test is separately configured in the control box 150, when the switch 61 of the welding torch 60 is pressed for the purpose of adjusting the welding gas discharge flow rate, the solenoid valve 120 is pressed. This is because an arc is generated on the welding torch 60 side while the welding wire is unnecessarily supplied while being opened.

Figure 1 shows the overall configuration of the gas welder system to which the wire feeder according to the present invention is applied.

2 is a perspective view showing a wire feeder for a welder according to the present invention.

Figure 3 shows an extract of the flow meter unit mounted on the control box of the wire feeder according to the present invention.

Figure 4 is a schematic view showing an exploded view of the internal structure of the flow meter unit according to the present invention.

Figure 5 is a schematic view showing a part of the internal structure of the flow meter block of the flow meter unit according to the present invention.

Figure 6 is a side cross-sectional view showing an assembled state of the flow meter unit according to the present invention.

Figure 7 is a side cross-sectional view showing an operating state of the flow meter unit according to the present invention.

* Description of the symbols for the main parts of the drawings *

60. Welding torch 100. Wire feeder

110. Body frame 120 Solenoid valve

150. Control box 170. Gas test switch

200.Flowmeter unit 210.Flowmeter block

220..Inner tube 230..Concrete

240. Outer pipe 250. Fastening ring

Needle Valve

Claims (5)

delete The control cable 50 extending from the welding body 30 and the gas hose 20 connected to the gas storage tank 10 side are connected to the welding torch 60 and the welding wire 60 is connected to the welding torch 60. A main frame 110 equipped with a pulley 130 and a feeding motor 140 for automatically feeding the 131; A solenoid valve 120 for opening and closing the middle of the gas hose 20 according to the switching operation at the welding torch 60 side; A wire feeder for a welder, which is installed at the front side of the main frame frame 110 and has a control box 150 provided with operation knobs 160 and 161 for adjusting current and voltage values applied to the welding torch 60 side. To; The control box 150 is formed of an enclosure having an open front surface and is disposed to cover the box main body 151 installed on the front of the main body frame 110 and the open front part of the box main body 151. An opening 153 is provided to view the inside of the box body 151 and has a box cover 152 in which the operation knobs 160 and 161 are installed; The control box 150 has a flow meter unit (200) for checking the gas flow rate discharged to the welding torch (60) side when the solenoid valve 120 is opened; The flow meter unit 200; Inlet bore 211 is mounted to the bottom of the box body 151 of the control box 150, the rear side is processed in conjunction with the gas storage tank 10 side to inject gas and the orifice 212 is drilled at the bottom. ) Is provided, and a valve bore 213 is formed on the front surface facing the inlet bore 211 to be in communication with the inlet bore 211 through the orifice 212, the side of the welding torch ( Outlet bore 214 is connected to the gas hose connected directly to the side 60 is formed by the bore processing, the upper surface has a gas distribution space 215 is formed inside the bottom surface of the valve bore 213 The gas inflow path 216 connected to the bottom side is drilled, and the gas discharge path 217 associated with the outlet bore 214 is drilled to the bottom edge side, and a pipe threaded portion 218 has a male screw processed on the outer circumference thereof. Metal flow meter block (210) .; An inner tube 220 installed at a bottom central portion of the pipe coupling portion 218 of the flow meter block 210 so as to communicate with the gas inflow passage 216 and having a sphere 230 disposed therein and an upper end thereof opened; The outer tube 240 is installed on the upper end of the pipe coupling part 218 while surrounding the inner tube 220, and guides the gas discharged through the inner tube 220 to exit to the gas discharge path 217. )and; Tightening to fix the lower end portion of the outer tube 240 to the distal end of the tube coupling part 218 of the flow meter block 210 is coupled to the outer periphery of the tube coupling part 218 of the flow meter block 210. Ring 250; Coupling-bolt member 262 mounted to the distal end of the valve bore 213 by a female screw hole 262a penetrating therein, and a female screw hole of the coupling-bolt member 262. 262a) the central portion is coupled to the screw coupling method is capable of moving forward and backward and the valve rod 263 is provided with a tapered needle (261) for adjusting the opening degree of the orifice (212) at the distal end, and the valve rod (263) A needle valve 260 which is provided at a rear end of the handle and includes a manipulation wheel 264 for rotating the valve rod 263 in the forward and reverse directions; Wire feeder for welders with a flow meter unit, characterized in that provided. delete delete 3. The method of claim 2, The solenoid valve 120 is temporarily opened to the box cover 152 of the control box 150 to flow through the height 230 of the sphere 230 of the inner tube 220 disposed in the flow meter unit 200. Gas test switch 170 for confirming that the wire feeder for welders with a flow meter unit, characterized in that disposed.

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