JP5854780B2 - Welding wire feeder - Google Patents

Description

  The present invention relates to a welding wire feeding device which is used for consumable electrode gas shield arc welding and has an improved wire straightening portion for straightening the welding wire.

  In consumable electrode gas shielded arc welding, a welding wire feeding device is used to feed a welding wire stably. Conventionally, as the welding wire feeding device, devices shown in FIGS. 4 and 5 have been proposed. FIG. 4 is a diagram showing a welding wire feeding device 21 according to the prior art, and FIG. 5 is a diagram showing a wire feeding unit 28 of the welding wire feeding device 21.

In FIG. 4, the welding wire 11 is sent out from a wire reel 23 attached to the wire feeder main body 22. The wire straightening unit 24 attached to the wire feeder main body 22 includes a first fixed roll 25, a second fixed roll 26, and a movable roll 27 that can adjust the pressure applied to the welding wire 11. Become. The pressure applied to pressurize the welding wire 11 by adjusting the movable roll 27 is adjusted in accordance with the type, diameter and curvature of the welding wire 11. The bending of the welding wire 11 wound around the wire reel 23 is corrected by the first fixed roll 25, the second fixed roll 26 and the movable roll 27.

The welding wire 11 straightened by the wire straightening unit 24 is sent out to a wire feeding unit 28 attached to the wire feeding device main body 22. The wire feeding unit 28 shown in FIG. 5 has the drive gear 2 coupled to the motor 7, and the first feeding roll 3 a and the second feeding roll 3 b are rotatably supported by the wire feeding unit main body 8. Has been. A first gear 4a and a second gear 4b are coaxially attached to the first feeding roll 3a and the second feeding roll 3b, respectively, and the first gear 4a and the second gear 4b are provided. The drive gear 2 is meshed with each other.

  The first pressure roll 5a and the second pressure roll 5b are rotatably supported by the first pressure holder 6a and the second pressure holder 6b, respectively. The first feeding roll 3a and the second feeding roll 3b are respectively formed with grooves for feeding the welding wire 11 while being pressed. The center guide 10 is provided between the first feeding roll 3 a and the second feeding roll 3 b and guides the welding wire 11 inserted from the wire insertion port 9. The outlet guide 12 is attached to the delivery part of the welding wire 11 of the wire feeding part 28 and guides the welding wire 11. The conduit cable 29 is connected to the distal end portion of the outlet guide 12, and the welding wire 11 fed from the outlet guide 12 is guided to the welding torch 30. (For example, refer to Patent Document 1.)

  The operation will be described below. 4 and 5, the welding wire 11 fed from the wire reel 23 is straightened by the wire straightening unit 24 and fed to the wire feeding unit 28. The first feeding roll 3a and the second feeding roll 3b are rotated by the motor 7 attached to the wire feeding section 28, and the first feeding roll 3a and the second feeding roll 3b are rotated. And the first pressure roll 5a and the second pressure roll 5b, the welding wire 11 is sandwiched and sent out. The fed welding wire 11 is guided by the outlet guide 12 and guided to the welding torch 30 by the conduit cable 29.

JP-A-61-202778

  The wire straightening section 24 of the welding wire feeding device 21 described above can adjust the pressing force for pressing the welding wire 11 by moving the movable roll 27 up and down, but once the pressing force is set, it is always constant. Pressure is applied. On the other hand, the curvature of the welding wire 11 wound around the wire reel 23 differs between the start of winding and the end of winding. Therefore, since the curvature is small when the welding wire 11 of the wire reel 23 is first used, if the position of the movable roll 27 is set with a pressure corresponding to this curvature, the curvature is large immediately before the use of the welding wire 11 is finished. Therefore, the applied pressure is insufficient, and the welding wire 11 is not sufficiently corrected.

In this case, when the welding wire 11 is guided by the conduit cable 29 and fed to the welding torch 30 without sufficiently correcting the bending wrinkles of the welding wire 11, the feeding resistance is increased and good welding is performed. There are times when you can't do it. Therefore, an operator must adjust the pressure applied to the welding wire 11 by adjusting the position of the movable roll 27 according to the remaining amount of the welding wire 11 on the wire reel 23.

  The present invention provides a welding wire feeding device in which an operator does not need to adjust the pressurizing force to pressurize the welding wire by adjusting the position of the movable roll of the wire correction unit according to the remaining amount of the welding wire of the wire reel. The purpose is to do.

In order to solve the above-described problems, the invention of claim 1
A wire feeder main body;
A wire reel attached to the wire feeder main body and from which a welding wire is delivered;
A wire straightening unit that is attached to the wire feeder main body and straightens the welding wire fed from the wire reel;
In a welding wire feeding device provided with a wire feeding unit that is attached to the wire feeding device main body and feeds a welding wire straightened by the wire straightening unit,
The wire straightening part is a wire straightening part main body,
A wire insertion port provided in the wire straightening section main body and into which a welding wire is inserted;
A first fixed roll and a second fixed roll, which are rotatably supported by the wire straightening section main body, and whose lower portions are in contact with the welding wire inserted from the wire insertion port;
A central portion is rotatably supported by the wire straightening portion main body and is formed in a U shape. One end portion extends to the wire reel side from the wire insertion port, and the other end portion is the first fixed portion. A lower arm between the roll and the second fixed roll;
A wire insertion roll that is rotatably supported at one end of the arm, and a lower portion abuts against a welding wire on the wire reel side than the wire insertion port;
A movable roll that is rotatably supported by the other end of the arm and pushes up a welding wire between the first fixed roll and the second fixed roll;
A wire delivery port provided on the wire straightening unit main body, and fed with a welding wire that has passed through the second fixed roll;
When the wire insertion roll is pushed up by the welding wire, the movable roll is pushed up by rotating the arm with the central portion serving as a fulcrum, and between the first fixed roll and the second fixed roll. The welding wire feeding device is characterized in that the arm is formed so as to push up the welding wire.

The invention of claim 2
The arm according to claim 1 includes an arm body rotatably supported by the wire correction part body and an arm movable part.
The wire insertion roll is rotatably supported at one end of the arm movable part,
The other end of the arm movable part is attached to one end of the arm body so that the attachment angle can be adjusted,
The welding wire feeding device, wherein the movable roll is rotatably supported at the other end of the arm body.

  The welding wire feeding device of the present invention maintains the pressure applied to the welding wire of the movable roll of the wire correction portion when the welding wire of the wire reel is first used even immediately before the welding wire is consumed and the welding wire is used up. be able to. Therefore, the welding wire of the wire reel is not consumed, and the pressing force of the movable roll of the wire correcting portion is insufficient, so that the welding wire is not corrected sufficiently. In addition, since it is not necessary for the operator to adjust the position of the movable roll of the wire correction unit according to the remaining amount of the welding wire on the wire reel, workability can be greatly improved.

It is a figure which shows the wire correction part 32 of the welding wire feeding apparatus 31 of Embodiment 1 of this invention. It is a figure explaining operation | movement of the wire correction part 32 of the welding wire feeder 31 of Embodiment 1 of this invention. It is a figure which shows the wire correction part 52 of the welding wire feeding apparatus 51 of Embodiment 2 of this invention. It is a figure which shows the welding wire feeder 21 of a prior art. It is a figure which shows the wire feeding part 28 of the welding wire feeding apparatus 21. FIG.

[Embodiment 1]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. Since the wire reel and the wire feeding section of the welding wire feeding apparatus 31 according to the first embodiment of the present invention are the same as the wire reel 23 and the wire feeding section 28 of the prior art shown in FIGS. Is omitted. FIG. 1 is a diagram showing a wire straightening unit 32 of a welding wire feeding device 31 according to Embodiment 1 of the present invention, where FIG. 1 (A) is a plan view and FIG. 1 (B) is a front view. . In FIG. 1, a wire straightening unit 32 is attached to a wire feeder main body (not shown). The arm 33 is formed in a U shape or a U shape, and the central portion 33 c is rotatably supported by the wire correction portion main body 34. A wire insertion roll 35 is rotatably supported on one end 33a of the arm, and a movable roll 36 is rotatably supported on the other end 33b of the arm.

The welding wire 11 fed out from the wire reel 23 comes into contact with the lower part of the wire insertion roll 35. The first fixed roll 37 and the second fixed roll 38 are rotatably supported by the wire correction section main body 34, respectively. The wire insertion port 39 is provided in the wire correction part main body 34, and the welding wire 11 that has passed through the wire insertion roll 35 is inserted. The welding wire 11 inserted from the wire insertion port 39 comes into contact with the lower portions of the first fixed roll 37 and the second fixed roll 38. One end 33 a of the arm extends to the wire reel 23 side from the wire insertion port 39. The other end 33b of the arm is positioned below the first fixed roll 37 and the second fixed roll 38, and the welding wire 11 between the first fixed roll and the second fixed roll is It contacts the upper part of the movable roll 36.

When the welding wire 11 of the wire reel 23 is consumed and the insertion angle θ of the welding wire 11 from the wire reel 23 to the wire insertion port 39 is reduced, the wire insertion roll 35 is pushed up by the welding wire 11 and the arm 33 is moved. The movable roll 36 is pushed up by rotating around the central portion 33c of the arm.
The shape of the arm 33 is such that when the wire insertion roll 35 is pushed up by the welding wire 11, the movable roll 36 is pushed up to appropriately add the welding wire 11 between the first fixed roll 37 and the second fixed roll 38. It is set corresponding to the type, diameter and curvature of the welding wire 11 so that it can be pushed up by pressure and the curl of the welding wire 11 can be corrected. The wire delivery port 40 is provided in the wire correction part main body 34, and the welding wire 11 which passed the 2nd fixed roll 38 is sent out.

  The operation will be described below with reference to FIG. FIG. 2 is a diagram illustrating the operation of the wire straightening unit 32 of the welding wire feeding device 31 according to the first embodiment of the present invention. When welding is started, the welding wire 11 is sent out from the wire reel 23 by the first feeding roll 3a and the second feeding roll 3b of the wire feeding section 28 shown in FIG. As shown in FIG. 2A, the welding wire 11 fed from the wire reel 23 comes into contact with the lower portion of the wire insertion roll 35 that is rotatably supported by one end portion 33 a of the arm of the wire correction portion 32. The welding wire 11 that has passed through the wire insertion roll 35 is inserted from the wire insertion port 39, and the lower portions of the first fixing roll 37 and the second fixing roll 38 abut against the welding wire 11 to push down the welding wire 11. .

At this time, when the wire insertion roll 35 is pushed up by the welding wire 11, the arm 33 rotates about the central portion 33 c of the arm and the movable roll 36 is pushed up, and the first fixed roll 37 and the second fixed roll. The welding wire 11 between 38 is pushed up. On the other hand, since the welding wire 11 is in contact with the wire insertion port 39 and the wire delivery port 40, the first fixed roll 37 and the second fixed roll 38 push down the welding wire 11, and the movable roll 36 becomes the welding wire 11. By pushing up, the curl of the welding wire 11 is corrected. The welding wire 11 straightened by the wire straightening unit 32 is inserted into the wire feeding unit 28, and the welding wire 11 fed from the wire feeding unit 28 is guided to the welding torch 30 by the conduit cable 29.

  When welding is performed and the welding wire 11 of the wire reel 23 is consumed, the winding diameter of the welding wire 11 of the wire reel 23 decreases, and the welding wire from the wire reel 23 as shown in FIG. 11 to the wire insertion roll 35 is changed from the lower side to the upper side, and the insertion angle θ of the welding wire 11 from the wire reel 23 to the wire insertion port 39 is reduced. At this time, the wire insertion roll 35 is pushed up by the welding wire 11, the arm 33 rotates about the central portion 33 c of the arm, and the movable roll 36 is pushed up. As a result, the movable roll 36 further pushes up the welding wire 11 between the first fixed roll 37 and the second fixed roll 38, and the pressing force by which the movable roll 36 pressurizes the welding wire 11 is increased.

At this time, the shape of the arm 33 is such that when the wire insertion roll 35 is pushed up by the welding wire 11, the movable roll 36 is pushed up and the welding wire 11 between the first fixed roll 37 and the second fixed roll 38 is appropriately set. Since it is set according to the type, diameter, and curvature of the welding wire 11 so that it can be pushed up with an appropriate pressure to correct the winding wire 11, the winding wire 11 is appropriately corrected. can do.

  As a result, the pressure applied to the welding wire 11 of the movable roll 36 of the wire correction unit 32 when the welding wire 11 of the wire reel 23 starts to be used is maintained even immediately before the welding wire 11 is consumed and the welding wire 11 is used up. be able to. Therefore, the welding wire 11 of the wire reel 23 is not consumed and the pressing force of the movable roll 36 of the wire correction unit 32 is not insufficient, so that the welding wire 11 is not sufficiently corrected. Moreover, since the operator does not need to adjust the position of the movable roll 36 of the wire correction part 32 according to the remaining amount of the welding wire 11 of the wire reel 23, workability | operativity can be improved significantly.

[Embodiment 2]
FIG. 3 is a diagram illustrating the wire straightening unit 52 of the welding wire feeding device 51 according to the second embodiment of the present invention. 3A, the arm 53 includes an arm main body 55 and an arm movable portion 54, and the arm main body 55 is rotatably supported by the wire correcting portion main body 34 at a fulcrum 55c. The wire insertion roll 35 is rotatably supported by one end portion 54a of the arm movable portion, and the other end portion 54b of the arm movable portion can adjust the attachment angle with respect to the one end portion 55a of the arm body. It is screwed. A movable roll 36 is rotatably supported on the other end 55b of the arm body. For other functions, the same reference numerals are given to the same functions of the welding wire feeding device 31 of the first embodiment of the present invention shown in FIG.

The operation will be described below. When the type, diameter, and curvature of the welding wire 11 are different, or when the diameter and mounting position of the wire reel are different, the welding wire 11 of the wire reel 23 is connected to the wire correction section 52 as shown in FIG. The insertion angle θ inserted into the wire insertion port 39 can be adjusted. As a result, even when the type, diameter, and curvature of the welding wire 11 are different, or when the diameter and attachment position of the wire reel are different, the wire correction portion 52 of the wire reel 23 when the welding wire 11 of the wire reel 23 is first used is used. The pressure applied to the welding wire 11 by the movable roll 36 can be adjusted to an appropriate pressure. And just before the welding wire 11 is consumed and the welding wire 11 is used up, the welding wire 11 of the movable roll 36 of the wire correction unit 52 is the same as the welding wire feeding device 31 of the first embodiment of the present invention described above. It is possible to properly maintain the pressure applied to.

DESCRIPTION OF SYMBOLS 1 Welding wire feeder 2 Drive gear 3a 1st feed roll 3b 2nd feed roll 4a 1st gear 4b 2nd gear 5a 1st pressurization roll 5b 2nd pressurization roll 6a 1st Pressure holder 6b Second pressure holder 7 Motor 8 Wire feed section main body 9 Wire insertion slot 10 Center guide 11 Welding wire 12 Outlet guide 21 Welding wire feeding apparatus 22 Wire feeding apparatus main body 23 Wire reel 24 Wire correction Part 25 First fixed roll 26 Second fixed roll 27 Movable roll 28 Wire feeding part 29 Conduit cable 30 Welding torch 31 Welding wire feeding device 32 Wire straightening part 33 Arm 33a One end part 33b of arm The other end part of the arm 33c Central part of arm 34 Wire correction part main body 35 Wire insertion roll 36 Movable roll 37 First fixed roll 38 Second Fixed roll 39 Wire insertion port 40 Wire delivery port 51 Welding wire feeding device 52 Wire correction part 53 Arm 54 Arm movable part 54a One end part 54b of arm movable part 55 Other end part 55 of arm movable part Arm body 55a One end of arm body Portion 55b The other end 55c of the arm body Support point θ Insertion angle of the welding wire 11 from the wire reel 23 to the wire insertion port 39

Claims (2)

A wire feeder main body;
A wire reel attached to the wire feeder main body and from which a welding wire is delivered;
A wire straightening unit that is attached to the wire feeder main body and straightens the welding wire fed from the wire reel;
In a welding wire feeding device provided with a wire feeding unit that is attached to the wire feeding device main body and feeds a welding wire straightened by the wire straightening unit,
The wire straightening part is a wire straightening part main body,
A wire insertion port provided in the wire straightening section main body and into which a welding wire is inserted;
A first fixed roll and a second fixed roll, which are rotatably supported by the wire straightening section main body, and whose lower portions are in contact with the welding wire inserted from the wire insertion port;
A central portion is rotatably supported by the wire straightening portion main body and is formed in a U shape. One end portion extends to the wire reel side from the wire insertion port, and the other end portion is the first fixed portion. A lower arm between the roll and the second fixed roll;
A wire insertion roll that is rotatably supported at one end of the arm, and a lower portion abuts against a welding wire on the wire reel side than the wire insertion port;
A movable roll that is rotatably supported by the other end of the arm and pushes up a welding wire between the first fixed roll and the second fixed roll;
A wire delivery port provided on the wire straightening unit main body, and fed with a welding wire that has passed through the second fixed roll;
When the wire insertion roll is pushed up by the welding wire, the movable roll is pushed up by rotating the arm with the central portion serving as a fulcrum, and between the first fixed roll and the second fixed roll. A welding wire feeding device, wherein the arm is formed so as to push up the welding wire. The arm according to claim 1 includes an arm body rotatably supported by the wire correction part body and an arm movable part.
The wire insertion roll is rotatably supported at one end of the arm movable part,
The other end of the arm movable part is attached to one end of the arm body so that the attachment angle can be adjusted,
The welding wire feeding device, wherein the movable roll is rotatably supported on the other end of the arm body.

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