KR20050095962A - Wire feeding device - Google Patents

Abstract

The present invention relates to a wire feeder (1) for automatically feeding the wire 100 used as a consumable electrode in gas arc welding from the spool to the torch side, the wire feeder (1) according to the present invention is a reducer housing ( 10), the cover 20 is coupled to the rear side of the reducer housing 10 and the drive motor 21 is coupled to the rear side, and installed in the reducer housing 10 and the drive shaft of the drive motor 21 ( 23, the reduction gear unit 30 to reduce the rotation of the step by step to the output shaft 37 protruding toward the front side of the reducer housing 10, and the reducer housing 10 in the state fitted to the output shaft 37 Feeding that is rotated on the front side of the bracket 40 through the gear 40 is fixed on the front side of the bracket 40 is formed on the back groove 45, and the rear groove 45 of the bracket 40 Roller 57 and pressure roll in close contact with it By including the wire feeding unit 50 for feeding the wire 100 by the chuck 59, the feeding speed of the wire 100 can be stably decelerated without limitation to a low speed corresponding to the welding speed, as well as the bracket Can be reduced to the size of 40.

Description

Wire feeder {WIRE FEEDING DEVICE}

The present invention relates to a wire feeder, and more particularly to a wire feeder for automatically feeding the wire used as a consumable electrode in the protective gas arc welding from the spool to the torch side.

In general, the protective gas arc welding is a welding method to improve the welding efficiency and quality by forming a welding atmosphere with a protective gas, such as carbon dioxide or argon gas, and to enable the welding of the material impossible by coating arc welding. Such protective gas arc welding may include, for example, non-polar arc welding such as TIG (Tungsten Inert Gas) welding, and consumable electrodes such as metal inert gas (MIG) welding, carbonic acid arc welding, and metal active gas (MAG). It is divided into two-pole arc welding.

Taking the carbonic acid gas arc welding process as an example, when the welding torch is brought close to the welding part and the operation switch is pressed, the carbon dioxide filled in the gas cylinder is ejected through the gas nozzle of the welding torch and is spooled by the wire feeding device. From the electrode wire is fed to the base material adjacent to the base material, an arc is generated at the end of the electrode wire adjacent to the base material by the electricity applied to the welder, and the base material and the electrode wire is welded together by the heat generated by the arc is welded together, In this case, the feeding speed of the electrode wire serves as an important factor in determining the shape of the beads generated while the electrode wire is melted, that is, the spreading state and the bonding state.

1 shows a schematic diagram of a conventional wire feeding device 101.

As shown in FIG. 1, a conventional wire feeding device 101 includes a drive motor (not shown) for rotating a drive shaft at a predetermined rotational speed, and is fixed to the front side of the drive motor and connected to the drive shaft of the drive motor. A reducer (not shown) in which a reduction gear unit is mounted to reduce the rotational speed and transmits it to the output shaft 123, and a bracket fixed to the front side of the reducer and having an inlet 131 and an outlet 133 formed on both sides thereof ( 130 and two front feeding gears 143 respectively engaged with the feeding drive gears 141 fixed to ends of the output shaft 123 of the reducer protruding onto the front side of the bracket 130. And a feeding unit 140 that feeds the wire 150 by a pressure roller 149 that is pressed by the feed roller 145 and the pressure lever 147 integrally formed on the feed roller 145. .

However, in the conventional wire supply apparatus 101 as described above, since the reduction gear unit provided in the reduction gear is formed in a structure in which the rotation speed of the drive shaft of the drive motor is reduced to two stages and transmitted to the output shaft 123, There is a problem that there is a limit in decelerating the wire 150 to a proper speed at a relatively low speed corresponding to the welding speed.

In addition, in the conventional wire feeding device 101, since the gear coupling for driving the feeding roller 145 is made on the front side of the bracket 130, two feeding driven gears are placed on the front side of the bracket 130. FIG. Two feed rollers 145 each integrated in 143 and two press rollers 149 in close contact therewith, as well as one feed drive gear 141 meshed with the feed follower gears 143. Since it must be arranged, there is a problem that a relatively large size bracket 130 can be used.

Therefore, the present invention is based on the problem to provide a wire feeding device that can reduce the feeding speed of the wire to a low speed corresponding to the welding speed without limitation, as well as reduce the size of the bracket.

The problem is that the reduction gear unit embedded in the reducer housing to reduce the rotation of the drive shaft of the drive motor in three stages to transfer to the output shaft, the wire feed unit is installed on the bracket fixed to the front side of the reducer housing of the bracket It is solved by the wire feeding device according to the present invention, which feeds the wire by a combination of the feeding roller rotated through the gear coupling in the rear groove and the pressing roller in close contact therewith.

Hereinafter, with reference to the accompanying drawings, a wire feeding device according to an embodiment of the present invention will be described in detail.

Figure 2 shows a perspective view of the wire feeder 1 according to an embodiment of the present invention, Figure 3 shows an exploded view of the wire feeder 1 according to an embodiment of the present invention.

As shown in Figures 2 and 3, the wire feeder 1 according to an embodiment of the present invention is a torch (not shown) from the spool (not shown) to the wire 100 used as a consumable electrode in gas arc welding (Not shown), the fixed bracket 11 is integrally formed and the rear side of the reducer housing 10 is opened, coupled to the rear side of the reducer housing 10 and the drive motor 21 Is installed in the cover 20 and the reducer housing 10 coupled to the rear side, and output shaft protruding toward the front side of the reducer housing 10 by gradually reducing the rotation of the drive shaft 23 of the drive motor 21. A reduction gear unit 30 to be transferred to 37, a bracket 40 fixed on the front side of the reduction gear housing 10 while being fitted to the output shaft 37, and having a rear groove 45 formed therein; Gear in the back groove 45 of the bracket 40 With the sum includes a wire feeding unit 50 for feeding the wire 100 by the feeding roller 57 and the pressing roller 59 in close contact thereto are rotated respectively on the front side of the bracket 40.

The reducer housing 10 is fixed on a facility for gas arc welding and has a reduction gear unit 30 embedded therein, and a fixing bracket 11 for fixing onto the facility is integrally formed at a lower portion thereof. And the rear side is opened for installation of the reduction gear unit 30, and also rotates one end of the first rotation shaft 32 and the second rotation shaft 34 of the reduction gear unit 30 which will be described later. Support grooves for supporting the output shaft, support grooves for rotatably supporting the output shaft 37, and through holes 13 for penetrating the output shaft 37 are formed. Here, bearings for supporting the shaft are mounted on the support grooves, respectively.

The cover 20 is coupled to the rear side of the reducer housing 10, and the cover 20 seals the open rear side of the reducer housing 10 and simultaneously with the reducer housing 10 together with the reducer gear unit ( 30, the center hole 25 for penetrating the drive shaft 23 and fixing the insertion of the drive gear 31 is formed in the center, the reduction gear unit 30 on the front side of the cover 20. Support grooves rotatably supporting the other end of the first rotation shaft 32 and the second rotation shaft 34 of the (), and a support groove rotatably supporting one end of the output shaft 37. On the grooves are respectively mounted bearings for shaft support.

The rear side of the cover 20 is coupled to the drive motor 21, the drive motor 21 is supplied to the power supply from the outside by rotating the drive shaft 23 is required for the wire feeder 1 according to the present invention By generating the initial power, the drive shaft 23 is protruded while being rotatably supported in the front center portion of the cover (20).

In the inner space formed by the reduction gear housing 10 and the cover 20, a reduction gear unit 30 is installed. FIG. 4A shows a detailed view of the reduction gear unit 30, and FIG. A detailed view of the reduction gear unit 30 is shown.

The reduction gear unit 30 decelerates the rotation of the drive shaft 23 of the drive motor 21 step by step to transmit to the output shaft 37 protruding toward the front side of the reducer housing 10, Figure 4a and Figure As shown in 4b, the reduction gear unit 30 includes a drive gear 31 fixed on the drive shaft 23 of the drive motor 21 and a drive gear 21 in the reducer housing 10. A first rotational shaft 32 rotatably fixed to an upper side of the first rotation shaft, a first reduction gear 33 fixed to the first rotational shaft 32 and engaged with the drive gear 31, and the reduction gear housing 10 ) A second rotational shaft 34 rotatably fixed to one side of the drive gear 31 and a second reduction gear fixed on the second rotational shaft 34 and engaged with the first reduction gear 33. The second and fixed on the gear 35 and the output shaft 37 rotatably fixed to the lower side of the drive gear 31 By including the third reduction gear 36 meshed with the reduction gear 35, it is preferable to reduce the rotation of the drive shaft 23 of the drive motor 21 in three stages and to transmit it to the output shaft 37.

Here, the drive gear 31 is rotated at the same speed as the rotational speed of the drive shaft by being fitted onto the drive shaft 23 of the drive motor 21, it is preferable to have a very small diameter for proper deceleration.

On the upper side of the drive gear 31, a first rotation shaft 32 is fixed to the support groove of the reducer housing 10 and the support groove of the cover 20 so as to be rotatably supported, and the first rotation shaft 32 is The first reduction gear 33 fixed to itself and engaged with the drive gear 31 rotates at a slower speed than the drive shaft 23.

The first reduction gear 33 is fitted and fixed on the first rotation shaft 32, and the first reduction gear 33 is a standby gear 33a and a second reduction gear 35 meshed with the driving gear 10. The small gears 33b meshed with and formed integrally serve to reduce the rotation of the drive shaft 23 at a lower reduction ratio and transmit the same to the first rotation shaft 32.

One side of the drive gear 31 is fixed to the support shaft of the reducer housing 10 and the support groove of the cover 20, the second rotation shaft 34 is rotatably supported at both ends, the second rotation shaft 34 is It is fixed on itself and rotates at a slower speed than the first rotation shaft 32 by the second reduction gear 35 which is engaged with the standby gear 33a of the first reduction gear 33.

The second reduction gear 35 is fitted and fixed on the second rotation shaft 34, and the second reduction gear 35 is a standby gear 35a meshed with the small gear 33b of the first reduction gear 33. And the small gear 35b meshed with the third reduction gear 36 is integrally formed, thereby reducing the rotation of the first rotation shaft 32 at a lower reduction ratio and transmitting the same to the second rotation shaft 34. It is preferable to

A third reduction gear 36 is fitted and fixed on the output shaft 37 rotatably fixed to the lower side of the drive gear 31, and the third reduction gear 36 is formed by the small gear of the second reduction gear 35. It is made of only the air having a relatively large diameter meshed with the gear 35b, thereby reducing the rotation of the second rotary shaft 34 to transfer to the output shaft 37.

The output shaft 37 is fixed to the support groove of the cover 20 so as to be rotatably supported and rotatably supported to the support groove of the reducer housing 10 and the other end of the support housing of the reducer housing 10. It is rotatably fixed on the front side of the bracket 40 through the through hole 13 integrally formed in the groove and the bracket 40 to be described later.

Here, a key groove is formed on the outer peripheral surface of the other end so that the output shaft 37 is not separated from the bracket, and the fixing piece is fitted into the key groove.

Here, the driving gear 31 and the standby gear 33a of the first reduction gear 33 are formed as a helical gear, and the small gear 33b and the second reduction gear 35 of the first reduction gear 33 are formed. ), The standby gear 35a is formed of a spur gear, and the small gear 35b and the third reduction gear 36 of the second reduction gear 35 are formed as helical gears, thereby rotating rotational force of the drive shaft 23. It is desirable that the output shaft 37 can be transmitted stably and reliably.

Therefore, the reduction gear unit 30 primarily decelerates the rotational power of the drive shaft 23 through the combination of the drive gear 31 and the first reduction gear 33 and transmits it to the first rotation shaft 32. In this way, the rotational power of the first reduction shaft 32, which is primarily decelerated, is secondly decelerated through the combination of the first reduction gear 33 and the second reduction gear 35 and transmitted to the second rotation shaft 34. In this way, the rotational power of the second reduction shaft 34, which has been secondarily decelerated, is thirdly decelerated through the combination of the second reduction gear 35 and the third reduction gear 36 to be transmitted to the output shaft 37.

The front side of the reducer housing 10 is fixed to the bracket 40 is fitted to the output shaft 37, the bracket 40 is installed in the wire supply unit 50 to be described later to supply the wire 100 By forming a path, one side of the wire inlet 41 is coupled to the wire inlet 41 is introduced from the spool (not shown) by the wire supply unit 50, the other side to the earth by the wire supply unit 50 The wire discharge port 43 is discharged to the wire 100 is discharged to the ohchi (not shown) side, the rear side gears 51, 55 for transmitting the rotational power of the output shaft 37 to the feed roller 57 The rear grooves 45 (see FIG. 5B) are mounted to be coupled to each other.

Three through holes 46, 47, and 48 are formed in the rear groove 45 of the bracket 40, among which the central through hole 46 is rotatably supported by the other end of the output shaft 23. One end of the rotary shaft 53 for the rotation of the feed roller 57 is formed in both side through holes (47, 48) formed to be spaced apart at a predetermined distance to both sides of the central through hole (46) It is intended to be rotatably supported.

Therefore, in the wire feeder 1 according to the embodiment of the present invention, since the gear coupling for rotation driving of the feed roller 57 is made on the rear groove 45 of the bracket, not on the front side of the bracket 40, A smaller size bracket may be used than the bracket used in the conventional wire feeder.

In addition, a support 49 is integrally formed at an upper portion of the bracket 40, and the support lever 49 is hinged by a pressure lever 61 for pressing and fixing the pressure roller 59 onto the feed roller 57. It is fixed.

The wire feeding unit 50 is installed on the bracket 40. FIG. 5A shows a front view of the bracket 40 in which the wire feeding unit 50 is installed, and FIG. 5B shows the wire feeding unit 50. The back view of the bracket 40 is shown.

The wire supply unit 50 feeds the wire 100 from the wire inlet 41 to the wire outlet 43 on the bracket 40, as shown in FIGS. 5A and 5B, the output shaft 37. A feed drive gear 51 fixed to the upper side and mounted in the rear groove 45 of the bracket 40, a rotation shaft 53 rotatably fixed on the bracket 40, and the rotation shaft 53. A feed driven gear 55 fixed to one end of the bracket 40 and engaged with the feed driving gear 51 in the rear groove 45 of the bracket 40, and a feed roller 57 fixed on the rotating shaft 53; ), A pressure roller 59 hinged on the bracket 40, and a pressure lever 61 hinged on the bracket to pressurize and fix the pressure roller 59 onto the feed roller 57. It is desirable to.

Here, the feeding drive gear 51 is fixed to the output shaft 37 is mounted in the center of the rear groove 45 of the bracket 40, the rotational power of the output shaft 37 feeds the driven gear ( The feed roller 57 serves to transmit the gear roller 57 onto the fixed rotating shaft 53 through the gear coupling with the gear 55.

Both side through holes 47 and 48 in the rear groove 45 of the bracket 40 penetrate the rotating shafts 53 so as to be rotatably fixed to the front grooves 15 and 17 of the reducer housing 10 by bearings. The rotation shaft 53 receives the rotational power of the output shaft 37 through the gear coupling with the feeding follower gear 55 and serves to rotate the feeding roller 57 fixed on itself.

The feeding follower gear 55 is fixed to one end of the rotating shaft 53 to be engaged with both sides of the feeding drive gear 51 in the rear groove 45 of the bracket 40. The feeding follower gear 55 Is the role of transmitting the rotational power of the output shaft 37 to the rotating shaft 53 through the gear coupling with the feed drive gear (51).

The feed roller 57 is fixed on the rotating shaft 53 to rotate on the bracket 40. The feed roller 57 serves to actually feed the wire 100 by engaging with the pressure roller 59. By doing so, the end fixing plate (59a) and the end fixing plate (59a) is fixed on the rotating shaft (53) by a butterfly bolt (59b) coupled to the other end of the rotating shaft (53). It is preferable that grooves for guiding the wire 100 are formed on the feed roller 57.

The pressure roller 59 is hinged and fixed on the bracket 40 to be placed on the feed roller 57. The pressure roller 59 is pressurized and fixed onto the feed roller 57 by the pressure lever 61. By being engaged with the roller 57 serves to feed the wire 100 in conjunction with the feed roller 57.

The pressure lever 61 is hingedly fixed to the support 49 on the bracket 40. The pressure lever 61 presses and fixes the pressure roller 59 onto the feed roller 57, thereby forming an internal spiral shaft. It is configured to adjust the pressing force by turning the knob 61a coupled to the spiral shaft end to change the length of the spring (not shown) fitted thereto.

In addition, it is preferable that a guide hole 61c for penetrating the wire 100 is formed on the hinge shaft 61b of the pressing lever 61.

As described above, the wire feeding unit 50 has the feed driving gear 51 is mounted in the center of the rear groove 45, the feed driven gear 55 is both sides of the feed driving gear 51 By being engaged in a straight line each one by one, two pairs of feed rollers 57 and the pressure roller 59 is installed on the front side of the bracket 40, the wire 100 can be fed without slip It is preferable.

In addition, the wire feeding unit 50 is formed between the feed driving gear 51 and the feed driven gear 55 by the feed driving gear 51 and the feed driven gear 55 is formed as a spur gear of the same dimensions. The speed ratio of 1 is 1: 1, and the rotational speed of the output shaft 37 is preferably transmitted to the feed roller 57 as it is without deceleration or acceleration. In this case, the speed of the feed roller 57 is the same as the speed of the output shaft 37, the rotational speed of the drive shaft 23 of the drive motor 21 is reduced by the reduction gear unit 30, the wire 100 Speed control becomes easy.

Hereinafter, the overall operation of a preferred embodiment of the wire feeder 1 according to the present invention will be described:

Position the pressure roller 59 onto the feed roller 57 with the wire 100 mounted on the feed roller 57 and engage the pressure lever 61 to transfer the pressure roller 59 to the feed roller 57 at an appropriate pressing force. Pressurize.

In this state, when power is applied to the drive motor 21, the drive motor 21 rotates the drive shaft 23 relatively high speed. When the drive shaft 23 is rotated, the drive gear 31 fixed to the drive shaft 23 is rotated integrally with the drive shaft 23, in this case the rotation of the drive shaft 23 is the drive gear 31 ) Is first decelerated by the engagement between the standby gear 33a of the first reduction gear 33 fixed to the first rotation shaft 32 and transmitted to the first rotation shaft 32.

Rotation of the first rotation shaft 32, which is formed by the rotation of the drive shaft 23 being primarily decelerated, may include the small gear 33b and the second rotation shaft of the first reduction gear 33 fixed to the first rotation shaft 32. Among the second reduction gears 35 fixed to 34, the second gears are decelerated secondly by the engagement of the standby gears 35a and are transmitted to the second rotation shaft 34.

The rotation of the second rotary shaft 34, which is formed by the rotation of the drive shaft 23 being secondly decelerated, is performed by the small gear 35b and the output shaft 37 of the second reduction gear 35 fixed to the second rotary shaft 34. By being engaged with the third reduction gear 36 fixed to the third it is reduced to the third transmission to the output shaft (37).

When the output shaft 37 is rotated, the feeding drive gear 51 on the output shaft 37 is rotated in the rear groove 45 of the bracket 40, the feeding drive in the rear groove 45 As the feed follower gear 55 engaged with both sides of the gear 51 rotates, the feed roller 57 rotates on the front side of the bracket 40.

When the feed roller 57 rotates, the press roller 59 press-fixed to the upper portion is also rotated, and thus, the feed roller 57 and the press roller 59 are engaged by the feed roller 57 and the press roller 59. The wire 100 between the pressure roller 59 is to be fed.

Therefore, in the wire feeding device according to the present invention as described above, the reduction gear unit decelerates the rotation of the drive shaft of the drive motor in three stages and transfers the output shaft to the output shaft, without limiting the wire feeding speed to a low speed corresponding to the welding speed. In addition to reducing the speed, the combination of the feed roller and the pressure roller is installed on the front side of the bracket through the gear coupling in the rear groove of the bracket has an excellent effect that can be reduced to the size of the bracket.

1 is a schematic view of a conventional wire feeding device.

Figure 2 is a perspective view of the wire feeder according to an embodiment of the present invention.

Figure 3 is an exploded view of the wire feeding device according to an embodiment of the present invention.

Figure 4a is a detailed view of the reduction gear unit in the wire feeding device according to an embodiment of the present invention.

Figure 4b is a front view of the reduction gear unit in the wire feeding device according to an embodiment of the present invention.

Figure 5a is a front view of the bracket in which the wire feeding unit in the wire feeding device according to an embodiment of the present invention.

Figure 5b is a rear view of the bracket in which the wire feeding unit in the wire feeding device according to an embodiment of the present invention.

Explanation of symbols on main parts of drawing

1: wire feed roller according to the present invention

10: Reducer Housing

20: cover

21: drive motor

23: drive shaft

30: reduction gear unit

37: output shaft

40: bracket

45: back groove

50: wire feeding unit

51: feeding drive gear

53: rotation axis

55: feeding follower gear

57: feeding roller

59: pressure roller

61: pressure lever

100: wire

101: conventional wire feeder

Claims (7)

In the wire feeder for automatically feeding the wire used as a consumable electrode in gas arc welding from the spool to the torch side, A reducer housing in which a fixed bracket is integrally formed and a rear side thereof is opened; A cover coupled to the rear side of the reducer housing and having a driving motor coupled to the rear side; A reduction gear unit installed in the reducer housing and configured to gradually reduce rotation of the drive shaft of the drive motor to an output shaft protruding toward the front side of the reducer housing; A bracket fixed to the front side of the reducer housing in a state of being fitted to the output shaft and having a rear groove formed therein; And a wire feeding unit for feeding wires by a feeding roller which is rotated on the front side of the bracket and a pressure roller that is in close contact with each other by gear coupling in the rear groove of the bracket. The method of claim 1, The reduction gear unit includes a drive gear fixed to a drive shaft of the drive motor, a first rotation shaft fixed to an upper side of the drive gear in the reduction gear housing, and fixed to the first rotation shaft. A first reduction gear to be engaged, a second rotation shaft fixedly rotatable to one side of the drive gear in the reduction gear housing, and a second reduction gear fixed to the second rotation shaft and engaged with the first reduction gear; And a third reduction gear fixed to an output shaft that is rotatably fixed to the lower side of the driving gear and engaged with the second reduction gear, thereby reducing the rotation of the driving shaft of the driving motor in three stages and transmitting the same to the output shaft. Wire feeder, characterized in that. The method of claim 2, The first reduction gear includes an air gear meshed with the driving gear and a small gear meshed with the second gear reduction gear, and the second gear reduction gear is a gear gear meshed with the small gear of the first gear reduction gear, A wire feeding device characterized in that the meshed small gears are integrally formed, thereby enabling deceleration at a lower reduction ratio. The method of claim 3, wherein The driving gear and the standby gear of the first reduction gear are formed as helical gears, the small gear of the first reduction gear and the standby gear of the second reduction gear are formed as spur gears, the small gear of the second reduction gear and the third gear. The reduction gear is made of a helical gear, so that the rotational power of the drive shaft can be transmitted stably and reliably to the output shaft. The method of claim 1, The wire feeding unit is fixed on the output shaft and the feed drive gear mounted in the rear groove of the bracket, the rotation shaft is rotatably fixed on the bracket, and fixed to one end of the rotating shaft is the rear groove of the bracket A feed driven gear meshed with the feed driving gear in the inside, a feed roller fixed on the rotating shaft, a press roller hinged on the bracket, and a press roller fixed on the bracket to pressurize the press roller onto the feed roller. Wire feeding device comprising a pressing lever for fixing. The method of claim 5, The feeding drive gear is mounted at the center of the rear groove of the bracket, and the feeding follower gear is engaged in a straight line one by one on both sides of the feeding drive gear, so that two pairs of feeding rollers and pressurization are provided on the front side of the bracket. Wire feeder, characterized in that the roller is installed. The method according to claim 5 or 6, The feed drive gear and the feed follower gear is formed of a spur gear of the same size, the transmission ratio between the feed drive gear and the feed follower gear is 1: 1, characterized in that.