RU202866U1 - PORTABLE WELDING WIRE FEEDER - Google Patents

Abstract

The utility model relates to equipment for arc welding with a non-consumable electrode in a shielded gas environment, in particular, to a portable device for feeding a welding wire, and can be used in confined working conditions and at a height when erecting welded structures, where it is impossible to use stationary devices of this type. The device contains a body consisting of a base and a cover. Inside the housing there is a wire feeder, a wire spool, a connector for installing and fixing a torch. The body and cover are made of impact-resistant plastic. A groove is made in the body, in which the seal is placed, and the interior space is illuminated inside the body. The lugs for fastening the belts are located on the side of the housing opposite from the connector for installing and fixing the burner. The device has a low weight and compact dimensions, allows the welder to easily move around the object, site, performs all types of welding, in cramped conditions, at a height, during the entire work shift, while maintaining mobility, the welder does not experience additional stress on his arms and shoulders. 4 ill.

Description

The utility model relates to equipment for gas-shielded arc welding with a built-in welding wire feed and can be used in confined working conditions and at a height when erecting welded structures where it is impossible to use stationary devices of this type.

Wire feeders can be manufactured in several versions, each optimized for a specific application. Common classifications of wire feeders include robotic wire feeders, portable wire feeders, pull wire feeders, and wire drawing feeders. Portable devices are used in places where welding operations are performed with constant movement, and are located in cramped conditions, in confined spaces, at a height, etc. Portable units provide the appropriate filler wire for the welding operation in much the same way as a conventional stationary wire feeder does. This is often more difficult in the case of a portable wire feeder, as it is more likely to be subjected to repeated movement and use over a wide range of operating conditions, many of which can be unfavorable. In contrast, conventional stationary wire feeders are often used in controlled and unchanging environments such as a workshop or production area. In addition to functioning like a stationary device, the portable wire feeder should be compact and lightweight to allow for easier movement and use in confined work areas. Other desirable features of portable wire feeders are strength, tightness and ease of use.

Known portable wire feeders [US 6225596, B23K 9/133 (20060101)] and [US 6705563 B23K 9/133 (20060101)]. The disadvantages of the known devices with built-in automatic feeding of the welding wire is the weight and rather large dimensions of the devices that do not allow to work for a long time, as well as in cramped conditions, in various spatial positions, and these are horizontal, vertical, overhead, orbital seams, where the arm extension is below, at or above the level of the welder's body, the devices cannot be placed on the welder's body. Important and significant disadvantages of the known equipment for remote feeding of welding wire are their price, weight, dimensions, and equipment complexity.

Known compact wire feeder [US 4665300, B23K 9/133 (20060101)], taken as the closest analogue. The device, including the portable body, has a base, a side portion and a removable cover. The wire feeder is located inside the housing close to one side of the housing so that by removing the detachable part of the cover the operator can easily access the wire feeder. There is also a wire feed speed regulator, a toggle switch and a filler wire feed duration regulator, an on-off toggle switch, a connector for installing and attaching a torch. On the body of the device there are lugs for attaching a shoulder support belt, which allows the operator to support the device and have both hands free for use during welding operations, and also includes a shock-absorbing part, in the form of a cover on the body, adapted to fit against the operator's thigh.

The disadvantages of the known device are the large weight of the device and dimensions due to the presence of the wire feeding device inside the housing, such elements as: Gas line, Gas line connectors, Solenoid / gas supply valve, Printed circuit boards, Fuse box, Grounding lines of the welded product and their connectors connections. There is no illumination of the interior of the wire feeder. For convenient movement and carrying of the device, there is no provision for attaching the device to the welder's belt. The use of the device on a long shoulder strap creates a load on the shoulder, interferes with movement, leaning on the welder's hip, hanging down, can catch on various objects and protruding parts of equipment and structures where welding is performed. The impossibility of universal use for filler wire feed in argon arc welding (hereinafter - TIG), plasma, laser, gas-flame and other types of welding, where automatic, uniform filler wire feed is required. For the universal use of the known device for TIG and other types of welding, where automatic, uniform feeding of the welding wire is required, it is necessary to significantly modernize the known device and install additional special boards, control units, expensive fixtures and accessories in it.

The utility model is aimed at improving an external portable wire feeder for automatic feeding of welding wire, as part of equipment for semi-automatic manual arc welding with a consumable, non-consumable electrode in an inert shielding gas, for example argon, CO ₂ (carbon dioxide), a mixture of carbon dioxide and argon, and also for filler wire feeding in plasma, laser, gas-flame welding and brazing of ferrous and non-ferrous metals.

The applicant has not found well-known domestic compact portable wire feeders, therefore, the purpose of the utility model is aimed at import substitution, development and further production of domestic equipment that is not inferior to imported counterparts.

The task to be solved by the claimed utility model is to reduce the weight and dimensions as part of a set of equipment for semi-automatic, argon-arc, plasma, laser welding by reducing the weight and dimensions of a stand-alone welding wire feed unit and creating a compact universal wire feed device with built-in adjustment of the wire feed speed , adjusting the wire feed delay in argon-arc welding, using and adjusting the pulsed mode of filler wire feed, with the possibility of placing the wire feeder on the welder's belt, using a waist belt, or a quick-release fastener, also located on the welder's belt, or fixing the device using various magnetic and mechanical devices directly at the place of welding, such as a welding table, the plane of a pipe, tanks, elements of metal structures, where it is possible to fix or hang a mustache triple, while the device should have a compact size, low weight and preferably an insulated and sealed housing. An important factor is the possibility of using the proposed device with all known equipment for TIG and MIG / MAG welding, as well as other types of welding where automatic, uniform feeding of the welding wire is required, regardless of the manufacturer's design and country of origin.

The technical result of the proposed solution is to reduce the dimensions of the device to increase the mobility of the welder during work, in order to expand the possibilities of maneuver during welding at the place of installation of technological equipment, in the cramped conditions of the working space and at a height, subject to technical requirements for accuracy and quality connecting seam for specific structures, as well as to increase the convenience and safety of using the device as part of welding equipment.

The specified technical result for the claimed object - a useful model is achieved by the fact that a portable device for feeding a welding wire containing a housing having a base and an opening cover, a compact wire feeder located inside the housing near one of the sides of the housing, so that when the cover is opened, the operator can easily access the wire feeder, spool on the rod for welding wire, wire feed speed control, on / off toggle switch, socket for mounting and fastening the torch, lugs for attaching the support belt are located on the body of the device, the wire feeder is assembled into a single unit , in which the driving and pinching rollers of the wire pull are located coaxially with the motor shaft, while the motor shaft is located perpendicular to the coil rod. The indicated arrangement of the rollers, the electric motor in the housing allowed to place these units in the housing as compactly as possible, to make the most of the internal space of the housing. Since the operation of the device does not require ventilation, and during the operation of the wire feeder, due to the presence of a DC electric current with a voltage of 3-24 volts, moisture, dust, debris, foreign objects are not allowed to enter, the device case is made sealed, for which the case and cover made of one piece of impact-resistant plastic, and in the junction of the cover to the body there is a groove in which a rubber, wear-resistant seal is located, which in general allows safe use of the device in work in adverse conditions. In order to increase the convenience of changing the coil with the welding wire, for example, when working at night, in a dimly lit room, space, the interior is illuminated inside the case. For the convenience of wearing and working with the device, two eyes for fastening the belts are made on the opposite side of the body from the location of the connector for installing and fixing the burner. The indicated arrangement of the lugs allows the device to be suspended on the welder's waist belt, while the torch sleeve will come out from the bottom side of the suspended body, while the sleeve will bend less under its own weight, and will not interfere with the welder during welding. Also, the specified location allows you to attach the device to the welder's belt from the left, right, back and front, that is, in any position in which the greatest convenience of welding is achieved, with the left or right hand. The device is suspended permanently, for example, on a welding table, the plane of a pipe, a container, and elements of metal structures, in the same position. Possibility of joint use with any welding equipment known in the world for TIG, MIG / MAG welding, and other types of welding, where automatic, uniform feeding of the welding wire is required, regardless of the manufacturer's design.

The utility model is illustrated by illustrative materials, where in FIG. 1 is a detailed drawing of the device; FIG. 2 shows a drawing of the device from the side of the connectors for connecting the commutation cables, the location of the connector for mounting and fixing the torch and automatic filler wire feed devices, FIG. 3 shows a photograph of a prototype device using a special bracket with a filler wire tip attached to the welding head of a standard TIG welding torch, with an on / off button on the torch body, with the cover open, FIG. 4 is a photograph of the device located on the welder's belt.

The device includes:

1. The body of the device.

2. Electric motor.

3. Reducer.

4. Drive roller for wire pulling.

5. Wire feed pinch roller.

6. Connector for connecting the commutation wire from an external power supply / control unit.

7. Connector for installation and fastening of the torch in the form of a connecting sleeve of the feed mechanism and a union for connecting to a welding torch and additional filler wire feed devices.

8. Connector for the control wire of the START / STOP button located on the wire feed knob, standard TIG and MIG welding torch, or on / off pedal for filler wire mode.

9. Filler / Welding wire.

10. Coil of filler / filler wire with a diameter of 0.6-1.2 mm.

11. Clamping screw for filler / filler wire spool.

12. Lugs for attaching the device to the waist belt.

13. Potentiometer for adjusting the filler / filler wire feed speed.

14. Wire feed sleeve, which contains the wire liner and the control wire of the START / STOP button.

15. Wire of control of the START / STOP button.

16. Manual device - "Handle-feeder", for automatic feeding of the filler wire into the weld pool.

17. START / STOP button for filler wire feed into the weld pool.

18. The tip of the filler wire feed.

19. Commutation cable with power supply / control unit (Fig. 2).

20. ON / OFF button for impulse filler wire mode.

21. Duplicated three-position mini toggle switch for switching on the modes of pulsed filler wire feed. (Impulse - short, medium, long).

22. Potentiometer for adjusting the filler wire feed delay time from 0 to 10 seconds.

23. Illumination built into the body.

24. Cover.

25. Cover fixing latches.

26. Seal located in the groove of the cover (Fig. 3).

27. Fastening belts fixed to the lugs for hanging the device on the welder's waist belt (Fig. 4).

The operation of the device is described on the example of performing welding with argon-arc welding using a special device "Handle-feeder". The device operates as follows.

The device is connected via connector 6 to the control / power unit (not shown) using a commutation cable 19. A filler wire feed hose 14 is connected to the device. By means of fastening belts 27, the device is suspended on the welder's waist belt in any convenient position for work. The cover 23 is folded down, a coil 10 with a wire 9 is inserted, the cover is hermetically closed with latches 23. Depending on the type of welding, the grade and thickness of the material to be welded, the potentiometer 22 sets the required filler wire feed delay, in the range from 0 to 10 seconds. Also, if necessary, the button 20 switches on the mode of impulse feed of the filler wire, and the toggle switch 21 sets the required type of impulse for the filler wire. Depending on the selected welding current and the position of the seam, the filler wire feed speed is set with the potentiometer knob 13. The switch-on control wire (welding current, used for some types of filler or filler wire feed), filler wire feed using connector 8 is pre-connected. The device is ready for operation. The welding process begins by pressing the Start / Stop button on the TIG welding torch to the "Start" position, and the button is held in this fixed position during the entire current welding cycle. Between the non-consumable electrode of the TIG welding torch and the metal to be welded, non-contact arc excitation occurs with simultaneous or pre-supply of argon through the internal line, through a nozzle (not shown). Next, the tip 18 of the feeder 16 is brought to the weld pool and after sufficient melting of the base metal and the weld pool is ready for welding, the button 17 is pressed, the filler wire feed begins with preset modes of the filler wire feed rate, and, if necessary, the required type of the filler wire feed pulse is set. The filler wire feed delay mode is not used with the wire feed grip, as the welder himself controls the filler wire feed ON time. In the position of the button 17 "Start", the supply voltage is supplied to the electric motor 2 of the electric drive, the rotational movement of which is transmitted to the axis of the driving roller 4. The direction of rotation of the roller 4 is clockwise, and the pressure roller 5 is counterclockwise, which together provides the pulling from the coil 10 and pushing into the sleeve 14 movement with a smooth feed of the filler wire 9 into the welding zone through the tip 18. During operation, as needed, for example, when switching to a thin-walled part of the workpiece to be welded or welding the root of the seam, the potentiometer 13 (Fig. 2) adjusts the speed rotation of the electric motor, and, as a consequence of the driving roller 4 and the pressure roller 5, thereby smoothly changing the feed speed of the filler wire. Also, if necessary, we can turn on, turn off, switch different modes of impulse filler wire feed. At the end of the welding cycle, the button on the TIG welding torch is released, and the button 17 is also released by the welder to the "OFF" position, while the power supply to the electric drive is turned off and the wire feed is stopped. At the same time, on a falling welding current, a crater is filled at the finishing point of the seam, after which the welding current and the supply of argon are stopped. After welding, the device is removed from the welder's belt. When using a special tipped wire feeder attached to the head of a standard TIG welding torch, the wire feed delay function from 0 to 10 seconds can be used, and the function of the welding process start button located on the body of a standard welding torch can be used. torches for TIG welding, it is provided to combine with the mode of switching on the filler wire feed, using additionally provided for these purposes switching methods, which greatly facilitates the work of the welder and allows the use of welders with lower qualifications in the work. The filler wire feed speed and the use of the pulse feed mode are turned on and set in the same way as with the "Handle Feeder" device. Also, to enable / disable the filler wire feed mode, it is possible to use a foot pedal with the claimed device.

A portable device for feeding a welding wire has a low weight and compact size, allows the welder to easily move around the object, site, perform all types of welding, in cramped conditions, at a height, during the entire work shift. While maintaining mobility, the welder does not experience additional stress on the arms and shoulders.

Claims (1)

A portable device for feeding a welding wire, comprising a housing having a base and a cover, a wire feeding mechanism located inside the housing, including an electric motor, a gearbox, a drive and pinch rollers for drawing a wire, a spool for a welding wire, a connector for mounting and fastening a torch and located on the housing lugs for fastening belts, characterized in that the body and the lid are made of impact-resistant plastic, a groove is made in the body at the junction of the lid to the body, in which the seal is located, and inside the body there is an illumination of the inner space, while the lugs are located on the opposite Installing and fixing the burner to the side of the housing.

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