KR20080075428A

KR20080075428A - Welding torch device

Info

Publication number: KR20080075428A
Application number: KR1020070028788A
Authority: KR
Inventors: 김석조
Original assignee: 김석조
Priority date: 2007-02-12
Filing date: 2007-03-23
Publication date: 2008-08-18

Abstract

A welding torch device is provided to prevent delay of an operation due to cutting of a wire in the welding process, and to supply a shielding gas safely by changing a flow path of a torch. In a torch(10) for performing a welding operation by receiving a shielding gas and a wire, a welding torch device comprises: a tube(12) for guiding the shielding gas and the wire to the torch; a fixed plate(20) fixed to the tube and the torch in a state that respective unions(21,22) are fitted to the tube and the torch; a movable plate(30) which is rotatably mounted on the fixed plate, and which has a lever(34) such that the rotation of the movable plate can be locked by the lever; a drive unit which is mounted oppositely to the fixed plate and the movable plate, and which provides the wire with a transfer force in a state that the movable plate is locked; and a controller installed to control speed of a motor(40) mounted on one side of the drive unit. The drive unit includes a first roller(25) which is rotatably mounted on the fixed plate, and on which a gear(26) is formed concentrically, and a second roller(35) which is rotatably mounted on the movable plate, and on which a gear(36) is formed concentrically.

Description

Welding torch mechanism {Welding torch device}

1 is a perspective view showing a conventional welding torch and feeder,

2 is a front view showing a torch mechanism according to the present invention;

3 and 4 is a front view showing the main portion operating state of FIG.

5 is a front view showing a torch mechanism according to a modification of the present invention;

FIG. 6 is a cross-sectional view partially cut away from the left side of FIGS. 2 and 3;

7 is a configuration diagram showing the separation of the fixed plate and the movable plate according to the present invention,

8 is an enlarged cross-sectional view showing a roller according to the present invention;

9 and 10 are front and side views respectively showing a torch mechanism according to still another modification of the present invention.

Explanation of symbols on the main parts of the drawings

10: torch 12: tube

15: Feeder 16: Roller Mechanism

18: supply reel 20: fixed plate

20a: Communication hole 21, 22: Union

25, 35: roller 26, 36: gear

30: movable plate 32, 33: hinge

34: lever 38: torsion spring

40: motor 50: handle

52: button

The present invention relates to a welding torch mechanism, and more particularly, to a welding torch mechanism for preventing a work delay caused by cutting of a wire in a welding process by adopting a configuration in which a welding wire is pushed at the feeder and pulled from the tip. will be.

1 is a perspective view showing a conventional welding torch and feeder.

Inert gas arc welding is made of protective gas such as argon, helium and carbon dioxide to form a welding atmosphere, which enables welding of materials that are not possible with arc welding, and it is simple and clean. Typically in this welding a feeder 15 for feeding the wire W is connected to the torch 10 via a tube 12. The wire W wound on the supply reel 18 is fed by the roller mechanism 16 of the feeder 15 and is drawn out to the torch 10 together with the protective gas via the tube 12.

According to another conventional example, "Welding wire feeder" of Korean Registered Utility Model No. 20-0428783, "Drive means connected to the output shaft of the reducer is installed, so that the inlet and outlet to guide the welding wire is opposed to A fixed bracket formed; A rotation bracket having one side rotatably connected to an upper portion of the discharge port, and driven means for transferring a welding wire by being rotated by being engaged with the driving means; It is connected to the upper portion of the inlet rotatably, and a wire feeding device for welding, characterized in that it comprises a pressure lever for close contact with the other side of the fixed bracket.

However, in any of the above cases, if the length of the tube 12 becomes longer (for example, 5 m or more), the transfer frictional force of the wire W is increased, so that a soft material such as white iron or a coated wire may break during welding. There is a closed end which increases the welding labor and deteriorates the quality.

Accordingly, an object of the present invention is to provide a welding torch mechanism that employs a configuration in which the welding wire is pushed at the feeder and pulled from the tip, thereby preventing a work delay caused by cutting of the wire in the welding process.

Another object of the present invention is to change the flow path of the torch so that the supply of the protective gas is made safely.

In order to achieve the above object, the present invention provides a torch which is supplied with a protective gas and a wire to perform welding, the tube leading the protective gas and the wire to the torch; A fixed plate fixed to the tube and the torch via respective unions; A movable plate rotatably mounted to the fixed plate, the movable plate including a lever to enable locking of the rotation; Drive means mounted to the fixed plate and the movable plate, respectively, to provide a transfer force to the wire in a locked state of the movable plate; And a controller installed to adjust the speed of the motor mounted on one side of the driving means.

As another feature of the invention, the tube 12 uses a flexible pipe so that the operator can adjust the direction at will, left and right.

As another feature of the invention, the fixing plate further comprises a communication hole for forming a flow path of the protective gas in the union.

As another feature of the present invention, the fixing plate further includes a handle equipped with a button on one side.

As another feature of the present invention, the movable plate further includes a torsion spring on the center of rotation for providing an elastic force in a direction in close contact with the stationary plate.

As another feature of the present invention, the drive means includes a first roller rotatably mounted to the fixed plate and having a concentric gear, and a second roller rotatably mounted to the movable plate and having a gear concentrically. .

As another feature of the present invention, the fixing plate 20 may further include a handle 50 to facilitate the front, rear, left and right operation of the torch 10.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a front view showing a torch mechanism according to the present invention, Figures 3 and 4 is a front view showing the main operation state of Figure 2, Figure 5 is a front view showing a torch mechanism according to a modification of the present invention, Figure 6 2 is a cross-sectional view partially cut away from the left side of Figs. 2 and 3, Figure 7 is a block diagram showing the separation of the fixed plate and the movable plate according to the present invention.

The present invention relates to a torch 10 which is supplied with a protective gas and a wire W to perform welding. The use of the feeder 15 having the roller mechanism 16 and the supply reel 18 is the same as the conventional one, and the tube 12 for guiding the protective gas and the wire W to the torch 10 is used. . The present invention provides a method of embedding the supply line of the protective gas so as not to be exposed to the outside of the torch 10 while the wire W is smoothly transported and supplied to the torch 10 through the tube 12 without interruption. do.

At this time, the tube 12 of the present invention uses a flexible pipe, which is equally applicable to the torch 10 side. In FIG. 3, reference numeral 12 'indicates that the tube 12 is flexibly deformed to improve operator convenience. The flexibility of the tube 12 is not too high or too low and is selected to be deformable by the operator's operating force.

According to the present invention, the fixing plate 20 is fixed to the tube 12 and the torch 10 via the respective unions 21 and 22. The fixed plate 20 is made of a steel plate material, it is preferable to maintain a sufficient thickness (eg 10mm or more). The upper union 21 connects the tube 12 and the fixed plate 20, and the lower union 22 connects the torch 10 and the fixed plate 20. Although not shown in the drawing, conventionally, each nipple and a separate pipe tube for drawing and drawing gas on the union 21 and 22 are installed to be exposed to the outside.

The fixing plate 20 of the present invention further includes a communication hole (20a) for forming a flow path of the protective gas in the union (21) (22). Inlet holes 21a and discharge holes 22a are formed in the unions 21 and 22, respectively, and they are brought into close contact with the communication holes 20a of the fixed plate 20. In the close contact between the fixing plate 20 and the unions 21 and 22, the packing is interposed. The communication hole 20a has a C-shaped flow path as shown in FIG. 6 more clearly.

In addition, according to the present invention, the movable plate 30 having the lever 34 is rotatably mounted to the fixed plate 20 so as to enable locking of the rotation. If the movable plate 30 is a single steel plate material, the fixed plate 20 may be combined with a double steel plate material or integrally formed by casting as shown in FIG. One end of the movable plate 30 is rotatably mounted to the fixed plate 20 via the hinge 32. The lever 34 rotatably mounted on the fixed plate 20 via another hinge 33 is engaged with the other end of the movable plate 30. 2 and 6 are the state in which the lever 34 is pushed into the lower end of the movable plate 30 to lock, and when the lever 34 is vertically lowered as shown at 34 'in FIG. 4, the lock is released to move the movable plate 30. Free meeting is possible.

At this time, the movable plate 30 of the present invention may further include a torsion spring 38 on the rotation center to provide an elastic force in a direction in close contact with the fixed plate 20. In FIG. 5, the torsion spring 38 is installed on the hinge 32 of the movable plate 30 to act as an elastic force as if the lever 34 is locked. Of course, according to such a configuration, it is possible to omit the lever 34, the operator releases the lock as shown by 30 'by hand. The elastic force of the torsion spring 38 is such that it forms a sufficient frictional force for feeding the wire.

In addition, according to the present invention, the driving means for providing a transfer force to the wire (W) in the locked state of the movable plate 30 is mounted so as to face the fixed plate 20 and the movable plate 30, respectively. The driving means is composed of the first roller 25 and the second roller 35 facing each other as described later in Figure 8 is a method of providing a frictional feed force in contact with the wire (W) in a state facing at regular intervals .

The drive means of the present invention is rotatably mounted to the fixed plate 20 and the first roller 25 having the teeth 26 concentrically, and rotatably mounted to the movable plate 30 and gears 36 concentrically. It has a second roller 35 having a). When the lever 34 is positioned as in the state of FIG. 2, the first roller 25 and the second roller 35 having the respective gears 26 and 36 concentrically engage with each other. The motor 40 is connected to the first roller 25 side in the fixed plate 20, but since the power is transmitted through the gears 26 and 36, the second roller 35 also interlocks accurately. However, when the movable plate 30 is released by pressing the lever 34, the engagement of the rollers 25 and 35 is released, and the wire W can be removed or mounted in this state.

When the fixing plate 20 and the movable plate 30 are completely separated as shown in FIG. 7, the mounting positions of the rollers 25 and 35, the motor 40, the hinge 32, and the like of the driving unit are more clearly revealed. The numbers in parentheses in Fig. 7 are for indicating the mounting position of the component.

On the other hand, the present invention has been described as driving the wire at the same time using the two gears 26, 36, but the configuration is also possible to drive the roller 25 of one side, omitting the gears 26, 36. In this case, the driven roller 35 may be replaced with a bearing in order to simplify the configuration.

In addition, according to the present invention, a controller is installed to adjust the speed of the motor 40 mounted on one side of the driving means. According to the configuration of the present invention, because the feeder 15 pushes the wire W and the driving means of the torch 10 pulls the wire W, no break occurs during welding. The driving means of the torch 10 uses the motor 40 as a driving source and the speed is controlled by the controller, which maintains the speed of the driving means slightly higher than the speed of the roller mechanism 16. The controller may be installed in the torch 10 or in the feeder 15, and in the former case, the power supply line is in close contact with the tube 12.

At this time, as shown in Figure 6 the cover 45 of the insulating material such as MC nylon on the outer surface of the motor 40 is installed in the maximum area, from the portion where the cover 45 is not installed to the fixing plate 20 epoxy mold 42 ). Accordingly, it is possible to prevent a phenomenon in which the motor 40 of the welding torch is in contact with a metallic short circuit during welding. The cover 45 and the mold 42 may be formed to a thickness sufficient to maintain insulation for a long time.

8 is an enlarged cross-sectional view of a roller according to the present invention.

The state in which the first roller 25, which is the driving means of the present invention, is integrally coupled with the tooth 26 and the state in which the second roller 35 is integrally coupled with the tooth 36 is illustrated. When the diameter of the wire (W) is different, it is easy to remove the rollers 25 and 35 from the gears 26 and 36 and replace them with other ones. The grooves 25a and 35a which appear on the outer circumferential surface of the rollers 25 and 35 are for increasing the frictional tensile force of the wire W and may be formed singularly or plurally.

For example, in the operation of the argon arc welding process, when the switch of the controller is pressed with the torch 10 approaching the welded portion, the protective gas filled in the gas cylinder passes through the tube 12 to communicate with the hole 20a of the fixed plate 20. At the same time as being ejected through the wire (W) is released from the supply reel (18) to receive the thrust by the roller mechanism (16) is supplied under tension by the drive means in the torch (10). When the wire (W) is adjacent to the base material, the arc is generated by the applied power and welding is performed at a high temperature of the arc. If the supply speed of the wire (W) is inappropriate, defects such as insufficient penetration and undercut may occur. Of course, the welding speed at which the arc travels along the weld joint also affects the depth of welding, bead shape, and arc stability along with the welding current and welding voltage.

Speed control by the rollers 25, 35 of the torch 10, rather than the roller mechanism 16 of the feeder 15, as in the present invention, is advantageous in terms of the correct transportation of the wire W. That is, even if the wire W is correctly supplied by the roller mechanism 16 of the feeder 15, the speed unevenness occurs due to the elastic deformation of the wire W inside the tube 12.

The present invention proposes a push-pull method considering the wire having a small diameter and a soft material. However, when the length of the tube 12 is very long, the present invention may be applied by a double push method.

The fixing plate 20 of the present invention may further include a handle 50 on which one button 52 is mounted. The handle 50 is for a function that makes it easy for the operator to hold the torch in his hand, and may be attached to the side of the fixing plate 20 as shown in FIG. 9 or to the rear surface of the fixing plate 20 as shown in FIG. . In either case, the handle 50 maintains the center of gravity of the torch 10 in a stable manner to facilitate operation with less force. In the case of FIG. 10, the motor 40 is accommodated inside the handle 50. The button 52 formed on the handle 50 may be utilized as a switch for operating the motor 40.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

According to the above configuration and action, the present invention adopts a configuration in which the welding wire is pushed from the feeder and pulled from the tip to prevent the work delay caused by the cutting of the wire in the welding process, and to change the flow path of the torch to safely supply the protective gas. It has the effect of making it happen.

Claims

In the torch 10 which is supplied with the protective gas and the wire W to perform welding:

A tube 12 which guides the protective gas and the wire W to the torch 10;

A fixing plate 20 fixed to the tube 12 and the torch 10 via respective unions 21 and 22;

A movable plate 30 rotatably mounted to the fixed plate 20 and having a lever 34 to enable rotation of the rotation plate;

Driving means mounted to the fixed plate 20 and the movable plate 30 so as to face each other and providing a transfer force to the wire W in a locked state of the movable plate 30; And

Torch mechanism for welding comprising a; is installed to adjust the speed of the motor 40 mounted on one side of the drive means.

The method of claim 1,

The tube 12 is a welding torch mechanism, characterized in that the use of flexible piping so that the operator can adjust the direction at will, left and right.

The method of claim 1,

The fixing plate 20 is torch mechanism for welding characterized in that it further comprises a communication hole (20a) for forming a flow path of the protective gas in the union (21, 22).

The method of claim 1,

Torch mechanism for welding, characterized in that the fixing plate 20 further comprises a handle 50, the button 52 is mounted on one surface.

The method of claim 1,

The movable plate (30) is a torch mechanism for welding, characterized in that it further comprises a torsion spring (38) on the center of rotation to provide an elastic force in the direction in close contact with the fixed plate (20).

The method of claim 1,

The drive means is rotatably mounted to the fixed plate 20 and the first roller 25 having the teeth 26 concentrically, and rotatably mounted to the movable plate 30 and the gears 36 concentrically. The genie is provided with a second roller (35) torch mechanism for welding.

The method of claim 1,

Torch mechanism for welding characterized in that it further comprises a handle (50) on the fixing plate 20 to facilitate the front, rear, left and right operation of the torch (10).