JP4435959B2 - Consumable electrode gas shield arc welding torch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improved consumable electrode gas shield arc welding torch (hereinafter referred to as a welding torch) attached to the wrist of an industrial robot.
[0002]
[Prior art]
Today, in order to improve the work efficiency of welding, it is widely performed to automate welding using an industrial robot. FIG. 2 is a diagram showing a general configuration of an articulated robot which is an example of an industrial robot. In the figure, a welding torch 4 is attached to the wrist 1 a of the manipulator 1, and a consumable electrode wire (hereinafter referred to as a wire) fed from a wire feeding device 6 is sent to the welding torch 4 through a conduit 5. Be paid. 2 is a robot control device for controlling the manipulator 1, and 3 is a teach pendant for operating the manipulator 1.
[0003]
Conventionally, the welding torch attached to the wrist 1a of the manipulator 1 has a structure shown in FIG. In the figure, a power feed tip 14 is attached to a tip 13a of a tip body 13 attached to a torch body 12 of a welding torch 11, and a circular hole for inserting a wire 15 is provided in a central axis portion of the power feed tip 14. It has been. Power is supplied to the wire 15 when the power supply chip 14 and the wire 15 are inscribed. The nozzle 16 surrounds the power supply tip 14 and the orifice 17. Shielding gas is ejected through a hole in an orifice 17 disposed below the chip body 13, and this shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere. An insulating bush 18 is disposed around the chip body 13.
[0004]
[Problems to be solved by the invention]
Since the wire 15 supplied to the welding torch 11 is usually wound around a wire reel, the wire 15 is bent. Since the bending flaw of the wire 15 is not constant, it is difficult to match the tip position of the wire 15 fed from the power feed tip 14 attached to the tip of the welding torch 11 with a desired welding target position.
Even if the bending curve of the wire 15 is kept constant and the wire 15 is fed to the welding torch 11, the conduit 5 is twisted when the robot posture changes in a complicated manner, and the wire 15 fed to the welding torch 11 is twisted. become. As a result, the tip position of the wire 15 cannot be matched with the desired welding target position, and a uniform and beautiful weld bead appearance cannot be obtained.
[0005]
In addition, power is supplied to the wire 15 when the wire 15 comes into contact with the power supply tip 14 attached to the tip of the welding torch 11, but if the bending of the wire 15 is not constant, the wire 15 and the power supply tip 14 are not connected. The contact point is not constant. As a result, the protruding length of the wire, which is the length from the contact point between the wire 15 and the power feed tip 14 to the tip of the wire 15, varies. Due to this variation, the resistance heat generation of the protruding portion of the wire varies, the wire melting amount changes, the arc length varies, and the welding result does not become constant.
[0006]
Furthermore, when the bending curvature of the wire 15 accommodated in the pack wire is small, the contact point between the wire 15 and the power supply chip 14 varies, and thus a spark may occur between the wire 15 and the inner surface of the power supply chip 14. . In this case, the power supply tip 14 is worn by this heat, or the wire 15 is welded to the inner surface of the power supply tip 14 to shorten the life of the power supply tip 14 and increase the number of replacements of the power supply tip 14. Originally, the robot is required to reduce the number of times of operation stop of the robot by replacing the power supply chip 14 or the like, but this request cannot be satisfied.
[0007]
Further, providing the guide hole for the wire 15 at the center of the shaft in the power supply chip 14 requires highly accurate processing, and processing is not easy.
[0008]
[Means for Solving the Problems]
The invention described in claim 1 at the time of filing is a first embodiment and is shown in FIG. 4 (including FIG. 9 in which the contact surface between a part of the inner chip 24 and the outer chip 23 in FIG. 4 is changed). like,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer tip 19 (FIG. 9) or 23 (FIG. 4) in contact with the tip case 25;
A wire guide liner 47 extending to the lower end 32a in the wire feed direction of the tip body 32;
A compression spring 27 that is disposed inside the tip case 25 and has a wire insertion hole in the axial center portion that is in contact with the lower end 47a of the wire guide liner 47 in the wire feed direction;
A pressure shaft 26 (FIG. 4) or 20 (FIG. 10) having a wire insertion hole at the center in the axial direction disposed inside the chip case 25 and in contact with the compression spring 27;
A consumable electrode gas shield arc welding torch comprising an inner tip 24 (FIG. 4) or 37 (FIG. 9) pressed by a pressure shaft 26 or 20 and an outer tip 19 or 23.
[0009]
The invention described in claim 2 at the time of filing is the first embodiment, and the contact surface between the inner chip 24 and the outer chip 23 in FIG. 4 is changed to the contact surface between the inner chip 37 and the outer chip 19 in FIG. A welding torch having a tapered shape 37d at the tip of the inner tip 37 and having an inclined surface 26d in surface contact with the tapered shape 37d of the inner tip 37 on the pressure shaft 26,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer tip 19 in contact with the tip case 25;
A wire guide liner 47 extending to the lower end 32a in the wire feed direction of the tip body 32;
A compression spring 27 that is disposed inside the tip case 25 and has a wire insertion hole in the axial center portion that is in contact with the lower end 47a of the wire guide liner 47 in the wire feed direction;
A pressure shaft 26 disposed inside the chip case 25 and having a wire insertion hole at an axially central portion in contact with the compression spring 27;
An inner tip 37 pressed by the pressure shaft 26 and the outer tip 19;
The tip of the inner tip 37 has a tapered shape 37d,
An inclined surface 26d that is in surface contact with the tapered shape 37d of the inner tip 37 of the pressure shaft 26 is provided,
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressure shaft 26, the pressure shaft 26 presses the inner tip 37, and the inner tip 37 presses the wire.
[0010]
The invention described in claim 3 at the time of filing is the first embodiment, and the contact surface between the pressure shaft 26 and the inner chip 24 in FIG. 4 is changed to the pressure shaft 20 and the inner chip 38 in FIG. And a torch for welding having a tapered shape 38e at the tip of the inner tip 38 and an inclined surface 23e in surface contact with the tapered shape 38e of the inner tip 38 on the outer tip 23,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 47 extending to the lower end 32a in the wire feed direction of the tip body 32;
A compression spring 27 that is disposed inside the tip case 25 and has a wire insertion hole in the axial center portion that is in contact with the lower end 47a of the wire guide liner 47 in the wire feed direction;
A pressure shaft 20 that is disposed inside the tip case 25 and has a wire insertion hole at the center in the axial direction contacting the compression spring 27;
An inner tip 38 pressed by the pressing shaft 20 and the outer tip 19 or 23,
While having a tapered shape 38e at the tip of the inner chip 38,
An inclined surface 23e that is in surface contact with the tapered shape 38e of the inner chip 38 is provided on the outer chip 23,
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressure shaft 20 so that the pressure shaft 20 presses the inner tip 38 and the inner tip 38 presses the wire.
[0011]
The invention according to claim 4 at the time of filing is the first embodiment, and as shown in FIGS. 4 and 6, the first taper shape 24d and the second taper are formed at both ends of the tip of the inner chip 24, respectively. The pressure shaft 26 is provided with an inclined surface 26d that is in surface contact with the first tapered shape 24d of the inner tip 24, and the outer tip 23 is in surface contact with the second tapered shape 24e of the inner tip 24. A welding torch provided with an inclined surface 23e,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 47 extending to the lower end 32a in the wire feed direction of the tip body 32;
A compression spring 27 that is disposed inside the tip case 25 and has a wire insertion hole in the axial center portion that is in contact with the lower end 47a of the wire guide liner 47 in the wire feed direction;
A pressure shaft 26 disposed inside the chip case 25 and having a wire insertion hole at an axially central portion in contact with the compression spring 27;
An inner tip 24 pressed by the pressing shaft 26 and the outer tip 23;
While having both the first taper shape 24d and the second taper shape 24e at both ends of the tip of the inner chip 24,
An inclined surface 26d that is in surface contact with the first taper shape 24d of the inner tip 24 is provided on the pressure shaft 26;
An inclined surface 23e that is in surface contact with the second tapered shape 24e of the inner chip 24 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressure shaft 26, the pressure shaft 26 presses the inner tip 24, and the inner tip 24 presses the wire.
[0012]
In the invention according to claim 5 at the time of filing, the position where the compression spring 27 according to claim 1 at the time of filing is provided is located inside the tip body 32 in the wire feed direction above the position where the influence of arc heat is small (that is, 7 is a second embodiment in which the compression spring is changed to a thermal influence avoidance position), and is shown in FIG. 7 (including FIG. 9 in which the contact surface between a part of the inner chip 24 and the outer chip 23 in FIG. 7 is changed). As in the invention described in claim 1 at the time of filing,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer tip 19 (FIG. 9) or 23 (FIG. 7) in contact with the tip case 25;
A wire guide liner 48 for guiding the wire inserted up in the wire feeding direction of the chip body 32;
A compression spring 27 that is disposed inside the tip body 32 and has a wire insertion hole in an axial center portion that is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 (FIG. 7) or 45 (FIG. 10) having a wire insertion hole whose upper end is in contact with the compression spring 27 and disposed inside the chip body 32 and whose lower end extends to the lower inside of the chip case 25;
This is a consumable electrode gas shield arc welding torch comprising an inner tip 24 (FIG. 7) or 37 (FIG. 9) pressed by a pressure shaft 41 or 45 and an outer tip 23.
[0013]
The invention according to claim 6 at the time of filing is a second embodiment in which the compression spring according to claim 2 at the time of filing is changed to a thermal influence avoidance position, and the inner chip 24 and the outer chip 23 of FIG. 9 is changed to a contact surface between the inner chip 37 and the outer chip 19 in FIG. 9, and the tip of the inner chip 37 has a tapered shape 37d and the pressure shaft 41 has a tapered shape 37d and a surface of the inner chip 37. A welding torch provided with an inclined surface 41d to contact,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer tip 19 in contact with the tip case 25;
A wire guide liner 48 for guiding the wire inserted up in the wire feeding direction of the chip body 32;
A compression spring 27 that is disposed inside the tip body 32 and has a wire insertion hole in an axial center portion that is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 having a wire insertion hole having an upper end in contact with the compression spring 27 and disposed inside the chip body 32 and having a lower end extending to the lower inside of the chip case 25;
An inner tip 37 pressed by the pressing shaft 41 and the outer tip 19;
The tip of the inner tip 37 has a tapered shape 37d,
The pressure shaft 41 is provided with an inclined surface 41d in surface contact with the tapered shape 37d of the inner tip 37,
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 41, the pressing shaft 41 presses the inner tip 37, and the inner tip 37 presses the wire.
[0014]
The invention described in claim 7 at the time of filing is a second embodiment in which the compression spring according to claim 3 at the time of filing is changed to a thermal influence avoidance position, and the pressure shaft 41 and the inner chip 24 of FIG. 10 is changed to the pressure shaft 45 and the inner tip 38 of FIG. 10, and the inner tip 38 has a tapered shape 38e at the tip, and the outer tip 23 is in surface contact with the tapered shape 38e of the inner tip 38. A welding torch provided with an inclined surface 23e,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 48 for guiding the wire inserted up in the wire feeding direction of the chip body 32;
A compression spring 27 that is disposed inside the tip body 32 and has a wire insertion hole in an axial center portion that is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 45 having a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 32 and having a lower end extending to the lower inside of the chip case 25;
An inner tip 38 pressed by the pressing shaft 45 and the outer tip 23,
While having a tapered shape 38e at the tip of the inner chip 38,
An inclined surface 23e that is in surface contact with the tapered shape 38e of the inner chip 38 is provided on the outer chip 23,
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 45, the pressing shaft 45 presses the inner tip 38, and the inner tip 38 presses the wire.
[0015]
The invention described in claim 8 at the time of filing is a second embodiment in which the compression spring according to claim 4 at the time of filing is changed to a thermal influence avoidance position, and as shown in FIGS. The tip 24 has a first taper shape 24d and a second taper shape 24e at both ends of the tip 24, respectively, and an inclined surface 41d in surface contact with the first taper shape 24d of the inner chip 24 is provided on the pressure shaft 41. A welding torch in which the outer tip 23 is provided with an inclined surface 23e in surface contact with the second taper shape 24e of the inner tip 24, and a wire insertion hole is formed in the axial center of the welding torch so that the wire In a consumable electrode gas shield arc welding torch that supplies power to a wire in contact with a power feed tip,
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 48 for guiding the wire inserted up in the wire feeding direction of the chip body 32;
A compression spring 27 that is disposed inside the tip body 32 and has a wire insertion hole in an axial center portion that is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 having a wire insertion hole having an upper end in contact with the compression spring 27 and disposed inside the chip body 32 and having a lower end extending to the lower inside of the chip case 25;
An inner tip 24 pressed by the pressing shaft 41 and the outer tip 23;
While having both the first taper shape 24d and the second taper shape 24e at both ends of the tip of the inner chip 24,
The pressure shaft 41 is provided with an inclined surface 41d in surface contact with the first tapered shape 24d of the inner chip 24,
An inclined surface 23e that is in surface contact with the second tapered shape 24e of the inner chip 24 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 41, the pressing shaft 41 presses the inner tip 24, and the inner tip 24 presses the wire.
[0016]
The invention described in claim 9 at the time of filing is a second embodiment in which the chip body 32 and the chip case 25 according to claim 5 at the time of filing are integrated into a chip body 40,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A chip body 40 having a wire insertion hole in the axial center;
An outer tip 19 (FIG. 9) or 23 (FIG. 7) in contact with the tip body 40;
A wire guide liner 48 for guiding the wire inserted to the upper side of the wire feeding direction of the chip body 40;
A compression spring 27 which is disposed inside the chip body 40 and has a wire insertion hole in the axial center portion which is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 (FIG. 7) or 45 (FIG. 10) having a wire insertion hole whose upper end is in contact with the compression spring 27 and disposed inside the chip main body 40 and whose lower end extends to the lower inside of the chip main body 40;
This is a consumable electrode gas shield arc welding torch comprising an inner tip 24 (FIG. 7) or 37 (FIG. 9) pressed by a pressure shaft 41 or 45 and an outer tip 23.
[0017]
The invention described in claim 10 at the time of filing is a second embodiment in which the chip body 32 and the chip case 25 according to claim 6 at the time of filing are integrated into a chip body 40,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A chip body 40 having a wire insertion hole in the axial center;
An outer tip 19 in contact with the tip body 40;
A wire guide liner 48 for guiding the wire inserted to the upper side of the wire feeding direction of the chip body 40;
A compression spring 27 which is disposed inside the chip body 40 and has a wire insertion hole in the axial center portion which is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 having a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 40 and having a lower end extending to the lower inside of the chip body 40;
An inner tip 37 pressed by the pressing shaft 41 and the outer tip 19;
The tip of the inner tip 37 has a tapered shape 37d,
The pressure shaft 41 is provided with an inclined surface 41d in surface contact with the tapered shape 37d of the inner tip 37,
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 41, the pressing shaft 41 presses the inner tip 37, and the inner tip 37 presses the wire.
[0018]
The invention described in claim 11 at the time of filing is a second embodiment in which the chip body 40 and the chip case 25 according to claim 7 at the time of filing are integrated into a chip body 40,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A chip body 40 having a wire insertion hole in the axial center;
An outer chip 23 in contact with the chip body 40;
A wire guide liner 48 for guiding the wire inserted to the upper side of the wire feeding direction of the chip body 40;
A compression spring 27 which is disposed inside the chip body 40 and has a wire insertion hole in the axial center portion which is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 having a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 40 and having a lower end extending to the lower inside of the chip body 40;
An inner tip 38 pressed by the pressing shaft 41 and the outer tip 23,
While having a tapered shape 38e at the tip of the inner chip 38,
An inclined surface 23e that is in surface contact with the tapered shape 38e of the inner chip 38 is provided on the outer chip 23,
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 45, the pressing shaft 45 presses the inner tip 38, and the inner tip 38 presses the wire.
[0019]
The invention described in claim 12 at the time of filing is a second embodiment in which the chip body 32 and the chip case 25 according to claim 8 at the time of filing are integrated into a chip body 40,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A chip body 40 having a wire insertion hole in the axial center;
An outer chip 23 in contact with the chip body 40;
A wire guide liner 48 for guiding the wire inserted to the upper side of the wire feeding direction of the chip body 40;
A compression spring 27 which is disposed inside the chip body 40 and has a wire insertion hole in the axial center portion which is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 having a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 40 and having a lower end extending to the lower inside of the chip body 40;
An inner tip 24 pressed by the pressing shaft 41 and the outer tip 23;
While having both the first taper shape 24d and the second taper shape 24e at both ends of the tip of the inner chip 24,
The pressure shaft 41 is provided with an inclined surface 41d in surface contact with the first tapered shape 24d of the inner chip 24,
An inclined surface 23e that is in surface contact with the second tapered shape 24e of the inner chip 24 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 41, the pressing shaft 41 presses the inner tip 24, and the inner tip 24 presses the wire.
[0020]
The invention described in claim 13 at the time of filing is the first embodiment or the second embodiment, and as shown in FIG. 4, FIG. 7 and FIG. 5 (or FIG. 11), Alternatively, the inner tip 24a according to 5 or 9 is divided into a plurality of surfaces including the axis in the axial direction, and an inner tip 24a is provided with a wire guide groove 24c (or 33c or 34c or 36c or 46c) in the central portion in the axial direction. 24b (or 33a, 33b, 33f or 34a, 34b, 34f, 34g or 36a, 36b or 46a, 46b).
[0021]
The invention described in claim 14 at the time of filing is the first embodiment or the second embodiment, and FIG. 4 or FIG. 7 (however, the contact surface between the inner chip 24 and the outer chip 23 is FIG. 9) and As shown in FIG. 5 (or FIG. 11), the inner tip 37 according to claim 2, 6 or 10 at the time of filing is divided into a plurality of parts in a plane including the axis in the axial direction, and the wire guide is provided in the axial center part Consumable electrode gas shield which is an inner tip 37a, 37b (or 33a, 33b, 33f or 34a, 34b, 34f, 34g or 36a, 36b or 46a, 46b) provided with a groove 37c (or 33c or 34c or 36c or 46c) This is an arc welding torch.
[0022]
The invention described in claim 15 at the time of filing is the first embodiment or the second embodiment shown in FIG. 4 or FIG. 7 (however, the contact surface between the pressure shaft 26 or 41 and the inner chip 24 is not shown). 10) and FIG. 5 (or FIG. 11), the inner tip 38 according to claim 3 or 7 or 11 at the time of filing is divided into a plurality of parts in a plane including an axis in the axial direction, and the central part in the axial direction is divided. The inner chip 38a, 38b (or 33a, 33b, 33f or 34a, 34b, 34f, 34g or 36a, 36b or 46a, 46b) provided with a wire guide groove 38c (or 33c or 34c or 36c or 46c) This is a torch for electrode gas shielded arc welding.
[0023]
The invention described in claim 16 at the time of filing is the first embodiment or the second embodiment, and as shown in FIG. 6, FIG. 8 and FIG. Alternatively, the inner tip 24a according to 8 or 12 is divided into a plurality of portions including a shaft in the axial direction and provided with a wire guide groove 24c (or 33c, 34c, 36c, or 46c) in the axial center. 24b (or 33a, 33b, 33f or 34a, 34b, 34f, 34g or 36a, 36b or 46a, 46b).
[0024]
The invention described in claim 17 at the time of filing is the first embodiment, and the contact surface between the pressure shaft 26 and the inner chip 24 of FIGS. 4 and 6 is used in FIG. ) Of the pressing shaft 20 and the inner tip 38, and the inner tip 38 of FIG. 10 is further changed to the inner tip 35 having the slit 35 a of FIG.
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 47 extending to the lower end 32a in the wire feed direction of the tip body 32;
A compression spring 27 that is disposed inside the tip case 25 and has a wire insertion hole in the axial center portion that is in contact with the lower end 47a of the wire guide liner 47 in the wire feed direction;
A pressure shaft 20 that is disposed inside the tip case 25 and has a wire insertion hole at the center in the axial direction contacting the compression spring 27;
An inner tip 35 pressed by the pressing shaft 20 and the outer tip 23;
The inner chip 35 is formed with an axial slit 35a and has a tapered shape 35e around the tip of the slit 35a.
An inclined surface 23e that is in surface contact with the tapered shape 35e of the inner chip 35 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the inner tip 35 and the inner tip 35 presses the wire.
[0025]
The invention described in claim 18 at the time of filing is the first embodiment and the inner chip 24 of FIG. 4 and FIG. 6 used in claim 4 at the time of filing is replaced with the first slit 39a and FIG. A welding torch changed to an inner tip 39 having a second slit 39b, wherein a wire insertion hole is formed in the axial center of the welding torch, and the wire contacts the power feed tip to supply power to the wire. Consumable electrode gas shield arc welding torch
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 47 extending to the lower end 32a in the wire feed direction of the tip body 32;
A compression spring 27 that is disposed inside the tip case 25 and has a wire insertion hole in the axial center portion that is in contact with the lower end 47a of the wire guide liner 47 in the wire feed direction;
A pressure shaft 26 disposed inside the chip case 25 and having a wire insertion hole at an axially central portion in contact with the compression spring 27;
An inner tip 39 pressed by the pressure shaft 26 and the outer tip 23,
A first slit 39a in the axial direction is formed on the inner chip 39, and a first tapered shape 39d is formed around the tip of the first slit 39a.
A second slit 39b is formed at a position orthogonal to the first slit 39a from the side opposite to the tip side of the first slit 39a of the inner chip 39, and the second chip 39b is formed around the tip of the second slot 39b. Having a tapered shape 39e,
The pressure shaft 26 is provided with an inclined surface 26d in surface contact with the first tapered shape 39d of the inner tip 39, and
An inclined surface 23e that is in surface contact with the second tapered shape 39e of the inner chip 39 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressure shaft 26, the pressure shaft 26 presses the inner tip 39, and the inner tip 39 presses the wire.
[0026]
The invention described in claim 19 at the time of filing is a second embodiment in which the compression spring according to claim 17 at the time of filing is changed to a thermal influence avoidance position, and the pressure shaft 41 of FIG. 7 and FIG. The contact surface with the inner chip 24 is changed to the pressure shaft 45 and the inner chip 38 of FIG. 10 (used in claim 7 at the time of filing), and the inner chip 38 of FIG. A welding torch changed to an inner tip 35 having 35a,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 48 for guiding the wire inserted up in the wire feeding direction of the chip body 32;
A compression spring 27 that is disposed inside the tip body 32 and has a wire insertion hole in an axial center portion that is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 45 having a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 32 and having a lower end extending to the lower inside of the chip case 25;
An inner tip 35 pressed by the pressure shaft 45 and the outer tip 23;
The inner chip 35 is formed with an axial slit 35a and has a tapered shape 35e around the tip of the slit 35a.
An inclined surface 23e that is in surface contact with the tapered shape 35e of the inner chip 35 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 45, the pressing shaft 45 presses the inner tip 35, and the inner tip 35 presses the wire.
[0027]
The invention described in claim 20 at the time of filing is a second embodiment in which the compression spring according to claim 18 at the time of filing is changed to a thermal influence avoidance position and is used in claim 7 at the time of filing. And a welding torch in which the inner tip 24 of FIG. 8 is changed to an inner tip 39 having a first slit 39a and a second slit 39b of FIG.
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A tip body 32 having a wire insertion hole in the axial center;
A chip case 25 in contact with the chip body 32;
An outer chip 23 in contact with the chip case 25;
A wire guide liner 48 for guiding the wire inserted up in the wire feeding direction of the chip body 32;
A compression spring 27 that is disposed inside the tip body 32 and has a wire insertion hole in an axial center portion that is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 having a wire insertion hole having an upper end in contact with the compression spring 27 and disposed inside the chip body 32 and having a lower end extending to the lower inside of the chip case 25;
An inner tip 39 pressed by the pressing shaft 41 and the outer tip 23;
A first slit 39a in the axial direction is formed on the inner chip 39, and a first tapered shape 39d is formed around the tip of the first slit 39a.
A second slit 39b is formed at a position orthogonal to the first slit 39a from the side opposite to the tip side of the first slit 39a of the inner chip 39, and the second chip 39b is formed around the tip of the second slot 39b. Having a tapered shape 39e,
The pressure shaft 41 is provided with an inclined surface 41d in surface contact with the first tapered shape 39d of the inner tip 39, and
An inclined surface 23e that is in surface contact with the second tapered shape 39e of the inner chip 39 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 41, the pressing shaft 41 presses the inner tip 39, and the inner tip 39 presses the wire.
[0028]
The invention described in claim 21 at the time of filing is a second embodiment in which the chip body 32 and the chip case 25 according to claim 19 at the time of filing are integrated into a chip body 40,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A chip body 40 having a wire insertion hole in the axial center;
An outer chip 23 in contact with the chip body 40;
A wire guide liner 48 for guiding the wire inserted to the upper side of the wire feeding direction of the chip body 40;
A compression spring 27 which is disposed inside the chip body 40 and has a wire insertion hole in the axial center portion which is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 45 having a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 40 and having a lower end extending to the lower inside of the chip body 40;
An inner tip 35 pressed by the pressing shaft 45 and the outer tip 23;
The inner chip 35 is formed with an axial slit 35a and has a tapered shape 35e around the tip of the slit 35a.
An inclined surface 23e that is in surface contact with the tapered shape 35e of the inner chip 35 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 45, the pressing shaft 45 presses the inner tip 35, and the inner tip 35 presses the wire.
[0029]
The invention described in claim 22 at the time of filing is a second embodiment in which the chip body 32 and the chip case 25 according to claim 20 at the time of filing are integrated into a chip body 40,
In a consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire.
A chip body 40 having a wire insertion hole in the axial center;
An outer chip 23 in contact with the chip body 40;
A wire guide liner 48 for guiding the wire inserted to the upper side of the wire feeding direction of the chip body 40;
A compression spring 27 which is disposed inside the chip body 40 and has a wire insertion hole in the axial center portion which is in contact with the lower end 48a of the wire guide liner 48 in the wire feeding direction;
A pressure shaft 41 having a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 40 and having a lower end extending to the lower inside of the chip body 40;
An inner tip 39 pressed by the pressing shaft 41 and the outer tip 23;
A first slit 39a in the axial direction is formed on the inner chip 39, and a first tapered shape 39d is formed around the tip of the first slit 39a.
A second slit 39b is formed at a position orthogonal to the first slit 39a from the side opposite to the tip side of the first slit 39a of the inner chip 39, and the second chip 39b is formed around the tip of the second slot 39b. Having a tapered shape 39e,
The pressure shaft 41 is provided with an inclined surface 41d in surface contact with the first tapered shape 39d of the inner tip 39, and
An inclined surface 23e that is in surface contact with the second tapered shape 39e of the inner chip 39 is provided on the outer chip 23, and
This is a consumable electrode gas shield arc welding torch in which the compression spring 27 presses the pressing shaft 41, the pressing shaft 41 presses the inner tip 39, and the inner tip 39 presses the wire.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram that best represents the features of the invention according to the application. Since it is the same as FIG. 8 described later, the description will be described later with reference to FIG.
The embodiment of the invention is the welding torch according to claim 8 at the time of filing of the second embodiment shown in FIG. 8, wherein the first tapered shape 24 d and the first tapered shape 24 d are respectively formed at both ends of the tip of the inner tip 24. And the pressure shaft 41 is provided with an inclined surface 41d in surface contact with the first taper shape 24d of the inner tip 24, and the outer tip 23 is provided with a second taper shape 24e of the inner tip 24. A welding torch provided with an inclined surface 23e in surface contact, a consumable electrode gas shield in which a wire insertion hole is formed in the axial center of the welding torch, and the wire contacts the power feed tip to supply power to the wire In an arc welding torch, a tip body 32 having a wire insertion hole in the center in the axial direction, a tip case 25 in contact with the tip body 32, and an outer tip in contact with the tip case 25. 23, a wire guide liner 48 for guiding the wire inserted to the upper side of the wire feed direction of the tip body 32, and a wire guide liner 48 disposed inside the tip body 32 and abutting against the lower end 48a of the wire guide liner 48 in the wire feed direction. A compression spring 27 having a wire insertion hole in the center portion in the axial direction, and a wire insertion hole having an upper end abutting against the compression spring 27 and disposed inside the chip body 32 and having a lower end extending down to the inside of the chip case 25. A pressure shaft 41 and an inner chip 24 pressed by the pressure shaft 41 and the outer chip 23 are provided, and a first taper shape 24d and a second taper shape 24e are provided at both ends of the tip of the inner chip 24, respectively. At the same time, the pressure shaft 41 is provided with an inclined surface 41d in surface contact with the first tapered shape 24d of the inner chip 24,
The outer tip 23 is provided with an inclined surface 23e that is in surface contact with the second tapered shape 24e of the inner tip 24, and the compression spring 27 presses the pressing shaft 41 and the pressing shaft 41 presses the inner tip 24 to the inner side. It is a consumable electrode gas shield arc welding torch in which the tip 24 presses the wire.
[0031]
【Example】
[First embodiment]
4 is a view showing a first embodiment of the welding torch of the present invention, and FIG. 5 is a cross-sectional view taken along the line AA of the first embodiment of the welding torch of the present invention shown in FIG. These are the figures which decomposed | disassembled one part for demonstrating the 1st Example of the welding torch of this invention. In FIG. 4, a hole penetrating in the axial direction for inserting the wire 15 is provided in the outer chip 23, and the inner chip 24 is disposed in the outer chip 23. As shown in FIG. 5, the inner tip 24 is divided into two on the surface including the shaft in the axial direction, and the axial wire guide groove 24 c for guiding the wire 15 to each of the divided inner tips 24 a and 24 b. May be provided. As shown in FIG. 6, both ends of the inner chip 24 or the divided inner chips 24a and 24b (hereinafter referred to as inner chips 24 (24a and 24b)) have tapered shapes 24d and 24e. A pressure shaft 26 is provided at one end of the inner tip 24 (24a, 24b), and one end of the pressure shaft 26 in contact with the inner tip 24 (24a, 24b) faces the one end of the first tapered shape 24d of the inner tip. It has the inclined surface 26d used as the shape which contacts. A compression spring 27 is provided at the other end 26 f of the pressure shaft 26, and the other end of the compression spring 27 is pressed by a presser 28. The wire guide liner 47 for guiding the wire 15 extends to the lower end 32 a of the tip body 32 in the wire feeding direction, and the tip end 47 a of the wire guide liner is in contact with the presser 48.
The pressure shaft 26, the compression spring 27 and the presser 28 are disposed in the chip case 25, one end of the outer chip 23 is attached to one end of the chip case 25, and the other end of the chip case 25 is connected to one end of the chip body 32. Installed. An inclined surface 23e corresponding to one end tapered shape 24e contacting the outer chip 23 of the inner chip 24 (24a, 24b) is provided on a surface inscribed with the inner chip 24 (24a, 24b) of the outer chip 23. The nozzle 29 surrounds the outer tip 23, the tip case 25 and the orifice 30. Shielding gas is ejected through a hole in an orifice 30 disposed at one end of the presser 28, and this shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere. An insulating bush 31 is disposed around the chip body 32.
The torch body 22, chip body 32, chip case 25, pressure shaft 26, outer chip 23 and inner chip 24 (24a, 24b) are made of a conductive material such as copper, and the compression spring 27 is a heat resistant material such as stainless steel. Consists of. Electric power is supplied to the inner chip 24 through the torch body 22, the chip body 32, the chip case 25, the pressure shaft 26, and the outer chip 23.
[0032]
The compression spring 27 presses the pressure shaft 26, the pressure shaft 26 presses the inner chip 24 (24a, 24b), and the inner chip 24 (24a, 24b) has tapered shapes 24d, 24e at both ends. Therefore, the inner tip 24 (24a, 24b) is pressed in the axial direction, that is, the direction in which the wire 15 is pressed, by being pressed by the inclined surface 26d at one end of the pressing shaft 26 and the inclined surface 23e of the inner surface of the outer tip 23. Pressed. As a result, the wire 15 is always pressed at a constant pressure by the inner chip 24 (24a, 24b) and is fed in contact with the inner chip 24 without a gap. Therefore, the wire 15 always passes through the axis of the inner tip 24, and the tip position of the wire 15 being welded is always constant with respect to the welding torch 21, so that the welding portion of the workpiece can be aimed.
[0033]
Further, the contact point between the wire 15 and the inner chip 24 becomes constant, and the protruding length of the wire, which is the length from the contact point between the wire 15 and the inner chip 24 to the tip of the wire 15, becomes constant. The amount of melt of becomes constant, and the penetration shape can be made uniform.
[0034]
Further, since the contact point between the wire 15 and the inner chip 24 is stabilized, no spark is generated between the wire 15 and the inner chip 24, and the wire 15 may be welded inside the power feeding chip 14. In addition, the life of the power supply chip 14 can be extended.
[0035]
The material of the inner chip 24 may be copper, a copper alloy such as chrome copper or beryllium copper, or conductive ceramics. Further, a sintered material such as copper tungsten cannot be used in the conventional power supply tip 14 because it is difficult to process the hole for inserting the wire 15. However, the divided inner tips 24a and 24b according to the present invention need only form the wire guide groove 24c for guiding the wire instead of providing the hole for inserting the wire. Can be easily pressure-molded.
[0036]
Instead of using a conductive material such as copper, the outer tip 23 can be made of a material that is difficult to be sputtered, such as ceramics and carbon, to improve durability.
[0037]
[Second Embodiment]
The second position shown in the first embodiment shown in FIGS. 4 to 6 is a second position in which the compression spring 27 is provided inside the tip body 32 that is less affected by the arc heat, in the wire feed direction. Examples are shown in FIGS. FIG. 7 is a view showing a second embodiment of the welding torch of the present invention, and FIG. 8 is a partially exploded view for explaining the second embodiment of the welding torch of the present invention. 7 is the same as that of the first embodiment of the welding torch of the present invention shown in FIG. 5 and is omitted. In FIG. 7, the description of the outer chip 23 and the inner chip 24 is the same as that of the first embodiment shown in FIG. A pressure shaft 41 is provided at one end of the inner chip 24 (24a, 24b), and one end of the pressure shaft 41 in contact with the inner chip 24 (24a, 24b) is in surface contact with one end of the tapered shape 24d of the inner chip. It has an inclined surface 41d. The other end 41 f of the pressure shaft 41 reaches the inside of the chip body 32, and the other end 41 f is provided with a compression spring 27, and the other end of the compression spring 27 is pressed by the torch body 44. The tip 48 a of the wire guide liner 48 that guides the wire 15 is inserted to the upper end 32 b of the tip body 32 in the wire feeding direction, and is in contact with the compression spring 27.
One end of the outer chip 23 is attached to one end of the chip case 25, and the other end of the chip case 25 is attached to the chip body 32. A pressure shaft 41 and a compression spring 27 are disposed in the chip body 32. The pressure shaft 41 passes through the chip case 25. The nozzle 29 surrounds the outer tip 23, the tip case 25 and the orifice 30. A shielding gas is ejected through the hole of the orifice 30, and the shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere. An insulating bush 31 is disposed around the chip body 32.
The torch body 44, the chip body 32, the chip case 25, the pressure shaft 41, the outer chip 23, and the inner chip 24 (24a, 24b) are made of a conductive material such as copper, and the compression spring 27 is a heat resistant material such as stainless steel. Consists of. Electric power is supplied to the inner chip 24 through the torch body 44, the chip body 32, the chip case 25, the pressing shaft 41, and the outer chip 23.
[0038]
The compression spring 27 presses the pressure shaft 41, the pressure shaft 41 presses the inner chip 24 (24a, 24b), and the inner chip 24 (24a, 24b) has tapered shapes 24d, 24e at both ends. Therefore, the inner tip 24 (24a, 24b) is pressed in the axial direction, that is, the direction in which the wire 15 is pressed, by being pressed by the inclined surface 41d at one end of the pressing shaft 41 and the inclined surface 23e of the inner surface of the outer tip 23. Pressed. As a result, the effects of the first embodiment shown in FIG. 4 are obtained, and the compression spring 27 is not affected by arc heat during welding, so that the life of the compression spring can be extended.
[0039]
In FIG. 7, the chip body 32 and the chip case 25 may be integrated to form the chip body 40.
[0040]
FIG. 9 and FIG. 10 are views showing another embodiment of the inner tip in which only one end of the inner tip 24 of the first and second embodiments of the welding torch of the present invention is tapered. The inner tip 37 shown in FIG. 9 is provided with a tapered shape 37d only at one end in contact with the pressure shaft 26 (41). An inclined surface is not provided on the surface inscribed in one axial end of the inner tip 37 adjacent to the wire insertion hole 19a of the outer tip 19. For this purpose, the inner tip 37 is pressed in the axial direction because one end of the inner tip 37 is in contact with the outer tip 19 by the pressing shaft 26 (41) pressed by the pressing spring pressing the inner tip 37. Is done. By making only one end of the inner chip 37 tapered, the man-hour can be reduced as compared with making both ends tapered.
Note that the inner chip 37 shown in FIG. 9 may be divided into two or three or more divided chips 37a and 37b provided with wire guide grooves 37c as shown in FIG.
[0041]
The inner tip 38 shown in FIG. 10 is provided with a tapered shape 38e only at one end opposite to the side in contact with the pressing shaft 20 (45). A taper shape is not provided at one end in the axial direction in contact with one end in the axial direction of the inner tip 38 of the pressureless shaft 20 (45) without taper. Therefore, when the pressing shaft 20 (45) pressed by the compression spring 27 presses the inner chip 38, the inner chip 38 is pressed in the axial direction while being pressed against the inclined surface 23e of the inner surface of the outer chip 23. The By making only one end of the inner chip 38 tapered, the man-hours can be reduced as compared with making both ends tapered.
Note that the inner chip 38 shown in FIG. 10 may be divided into two or three or more divided chips 38a and 38b provided with wire guide grooves 38c as shown in FIG.
[0042]
FIG. 11 is a view showing an embodiment of the shape of the inner tip 24 in the first and second embodiments of the welding torch of the present invention. 5A shows the shape of the divided inner chips 24a and 24b obtained by dividing the same inner chip as in FIG. 5 into two in the axial direction, including the axis, and FIG. 5B shows the shape of the inner chip 3 in the axial direction. The shapes of the divided inner chips 33a, 33b, and 33f are shown, and (C) shows the shapes of the divided inner chips 34a, 34b, 34f, and 34g obtained by dividing the inner chip into four in the axial direction. By increasing the number of divisions of the inner tip, the inner tip presses the wire 15 more evenly, so that the wire 15 can pass through the axis of the inner tip, and the wire 15 contacts the inner tip. The point can be made more constant.
Further, inner tips 36a and 36b in which the wire guide groove 36c shown in FIG. 11 (D) has a rectangular shape, and inner tips 46a and 46b in which the wire guide groove 46c shown in FIG. 11 (E) has an elliptical shape may be used.
[0043]
FIG. 12 is a view showing an embodiment in which a slit is inserted in the inner tip of the first embodiment and the second embodiment of the welding torch of the present invention. In the same figure, instead of the inner chips 24a and 24b having a shape in which the wire insertion groove 24c is divided into two in the above-described axial direction shown in FIG. A chip having a slit 35a, a tapered shape 35e at one end on the tip side of the slit 35a, and a wire insertion hole 35c at the axial center may be used. Since the slit-integrated inner chip 35 is a single piece, it is easy to handle.
When teaching welding to the robot, it is necessary to set the protruding length of the wire. In this case, since the feeding point to the wire is closer to the tip of the outer chip when the tip of the slit 35a of the slit-integrated inner chip 35 is provided on the side in contact with the outer chip 23, the protruding length of the wire is set. Easy. When the tip of the slot 36 of the slit-integrated inner chip 35 is provided on the side in contact with the outer chip 23, the other end in the axial direction in contact with one end in the axial direction of the inner chip 35 of the pressure shaft 20 (45) is tapered. There is no need to provide.
[0044]
FIG. 13 is a view showing an embodiment in which slits are inserted at two locations on the inner tip of the first embodiment and the second embodiment of the welding torch of the present invention. In the same figure, (A) is a front view, (B) is a right side view, (C) is a left side view, and (D) is a plan view. The inner chip 39 is an integral part, and the first slit 39a is inserted in the axial direction. Further, the inner chip 39 has a second side at a position substantially orthogonal to the first slit 39a on the base side of the first slit 39a. Insert a slit 39b, use a tip having tapered shapes 39d and 39e on the tip side of each of the first slit 39a and the second slit 39b, and a wire insertion hole 39c in the axial center. You may do it.
In this case, like the inner chip 35 shown in FIG. 12 (B), the inner chip 39 is an integral part, so that it is easy to handle. Further, similarly to the two-divided inner tip 24 having a shape divided into two in the axial direction shown in FIG. 12 (A), the pressing shaft 26 (41) and the outer tip 23 press the inner tip 39. Can evenly press the wire 15. As a result, the wire 15 can pass through the axis of the inner chip 39 more. Furthermore, the contact point between the wire 15 and the inner chip 39 can be made more constant.
[0045]
Although the present invention describes a welding torch attached to the wrist of an industrial robot, the present invention is not only applied to a welding torch attached to the wrist of an industrial robot. It can also be applied to a torch of a semi-automatic welding method such as a consumable electrode arc welding method.
[0046]
【The invention's effect】
In the first embodiment of the consumable electrode gas shielded arc welding torch according to the present invention, the conventional power supply tip is divided into an outer tip 23 and a tip case 25 so as to be detachable. The compression spring 27, the pressure shaft 26, and the inner tip 24 are inserted into the inner tip 24. Further, the inner tip 24 is divided into a plurality of portions in the axial direction including the shaft, and further, one or both ends have a taper shape and are compressed. Since the spring 27 is configured to press the inner chip 24 through the pressing shaft 26 to press the wire, the following effects can be obtained.
{Circle around (1)} The wire 15 is always pressed against the inner tip 24 with a constant pressure and is fed inwardly to the inner tip 24 without a gap. Accordingly, since the wire 15 always passes through the axis of the inner tip 24, the tip position of the wire 15 being welded is always constant with no variation with respect to the welding torch, and the welding site of the work piece is stably aimed. Can do.
(2) The contact point between the wire 15 and the inner tip 24 becomes constant, and the protruding length of the wire, which is the length from the contact point between the wire 15 and the inner tip 24 to the tip of the wire 15, becomes constant. The melting amount of 15 becomes constant, and the penetration shape can be made uniform.
(3) Since the contact point between the wire 15 and the inner chip 24 is stabilized, no spark is generated between the wire 15 and the inner chip 24, or the wire 15 is welded to the power feeding chip 14. It is possible to extend the life of the power feed chip 14 and reduce the number of chip replacements.
(4) Even if the posture of the robot changes in a complicated manner and the conduit 5 is twisted and the wire 15 fed to the welding torch 4 is twisted, the wire 15 is forcibly pressed by the inner tip 24, so Twist can be corrected. Therefore, the tip position of the wire 15 being welded can always be constant with respect to the welding torch, and the welding site of the workpiece can be aimed stably.
(5) In the conventional power supply chip 14, providing a guide hole for the wire 15 in the interior requires a high level of technology, and it is difficult to process with high accuracy. On the other hand, in the welding torch according to the present invention, only the inner tip 24 is in contact with the wire 15, so that only the inner tip 24 needs to be provided with a guide hole for the wire 15 with high accuracy, and the inner tip 24 is short. Therefore, this processing is easy and the accuracy can be increased.
[0047]
In the second embodiment of the consumable electrode gas shield arc welding torch according to the present invention, the conventional power supply tip is divided into an outer tip 23 and a tip case 25 to be detachable, and the compression spring 27 is attached to the tip body 32. Since the position where the compression spring 27 is disposed inside the upper end 32b in the wire feeding direction is set at a certain distance from the tip of the welding torch 43, in addition to the effects of the first embodiment, the compression spring Since 27 is not affected by arc heat during welding, the life of the compression spring can be extended.
[Brief description of the drawings]
FIG. 1 is a diagram that best represents the features of the invention according to the application;
FIG. 2 is a diagram showing a general configuration of an articulated robot that is an example of an industrial robot.
FIG. 3 is a view showing a conventional welding torch.
FIG. 4 is a view showing a first embodiment of a welding torch according to the present invention.
5 is a cross-sectional view taken along line AA of the first embodiment of the welding torch of the present invention shown in FIG. 4;
FIG. 6 is a partially exploded view for explaining the first embodiment of the welding torch of the present invention.
FIG. 7 is a view showing a second embodiment of the welding torch according to the present invention.
FIG. 8 is a partially exploded view for explaining a second embodiment of the welding torch of the present invention.
FIG. 9 is a view showing another embodiment of the inner chip in which only one end in contact with the pressure shaft of the inner chip 37 of the present invention is tapered.
FIG. 10 is a view showing an embodiment of an inner chip in which only one end contacting the outer chip 23 of the inner chip 38 of the present invention is tapered.
FIG. 11 is a diagram showing an example of the shape of the inner tip 24 of the welding torch according to the present invention.
FIG. 12 is a view showing an embodiment in which a slit is inserted at one place on the inner tip of the welding torch of the present invention.
FIG. 13 is a view showing an embodiment in which slits are made at two locations on the inner tip of the welding torch of the present invention.
[Explanation of symbols]
1 Manipulator
2 Robot controller
3 Teach pendant
4 Welding torch
5 conduit
6 Wire feeder
11 (Conventional) welding torch
12 Torch body (of conventional torch)
13 Chip body (conventional torch)
14 Feeding chip
15 wire
16 Nozzle (conventional torch)
17 Orifice (conventional torch)
18 Insulating bush (conventional torch)
19 Outer tip (without ramp)
20 Pressurizing shaft (without the inclined surface of the first embodiment)
21 Welding torch (of the first embodiment)
22 Torch body (of the first embodiment torch)
23 Outer tip (provided with an inclined surface)
23e Inclined surface of outer tip
24 Inner tip (having taper at both ends)
24a, 24b Split inner chip (having tapered shape at both ends)
24c Wire insertion hole of inner chip 24 or wire guide groove of divided inner chips 24a, 24b
24d First tapered shape of the inner chip 24
24e Second tapered shape of the inner chip 24
25 Chip case
26 Pressure shaft (provided with the inclined surface of the first embodiment torch)
26d Inclined surface of the pressure shaft 26 (of the first embodiment torch)
26f The other end of the pressure shaft 26 (abuts against the compression spring 27 of the first embodiment torch)
27 Compression spring
28 Presser
29 Nozzle (of the torch of the present invention)
30 Orifice (of the torch of the present invention)
31 Insulating bush (of the torch of the present invention)
32 Chip body
33a, 33b, 33f 3 split inner chip
33c Wire guide groove of inner chip 33
34a, 34b, 34f 34g 4 split inner chip
34c Wire guide groove of inner tip 34
35 (One-way slot) inner tip
35a slot
35c Wire insertion hole of inner chip 35
35e Taper shape of inner tip 35
36a, 36b Inner tip with wire guide groove formed into a square shape
36c Wire guide groove of inner tip 36
37 Inner tip (having a tapered shape at one end)
37a, 37b (with tapered shape at one end) split inner chip
37c Wire insertion hole of inner tip 37 or wire guide groove of divided inner tips 37a, 37b
37d Tapered shape of inner tip 37
38 Inner tip (having a tapered shape at one end)
38a, 38b Split inner chip (having a tapered shape at one end)
38c Wire insertion hole of inner chip 38 or wire guide groove of divided inner chips 37a, 37b
38e Tapered shape of inner tip 38
39 (Two places slit) Inner tip
39a First slit of the inner chip 39
39b Second slot of inner tip 39
39c Wire insertion hole of inner tip 39
39d First tapered shape of the inner tip 39
39e Second tapered shape of the inner tip 39
40 Chip body
41 Pressurizing shaft (provided with inclined surface of second embodiment torch)
41d Inclined surface of the pressure shaft 41 (of the second embodiment torch)
41f The other end of the pressure shaft 41 (abuts against the compression spring 27 of the second embodiment torch)
43 Welding torch (of the second embodiment)
44 Torch body (of second embodiment torch)
45 Pressure shaft (without the inclined surface of the second embodiment torch)
46a, 46b Inner tip with wire guide groove made elliptical
46c Wire guide groove of inner chip 46
47 Wire guide liner (of the first embodiment)
47a Tip of wire guide liner 47 (first embodiment)
48 Wire guide liner (of the second embodiment)
48a Tip of wire guide liner 48 (of second embodiment)

Claims (3)

  A consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire has a wire insertion hole in the axial center. A chip body, a chip case in contact with the chip body, an outer chip in contact with the chip case, a wire guide liner having a length extending to a lower end in a wire feeding direction of the chip body, and the chip case A compression spring having a wire insertion hole at the center in the axial direction that is disposed inside and in contact with the lower end of the wire guide liner in the wire feeding direction, and is disposed inside the tip case and contacts the compression spring A pressure shaft having a wire insertion hole at the axial center, and an inner chip pressed by the pressure shaft and the outer chip. Forming a first slit in the direction and having a first tapered shape around the tip of the first slit, and the first slit from the side opposite to the tip side of the first slit of the inner chip. A second slit is formed at a position orthogonal to the second slit, has a second taper shape around the tip of the second slit, and is in surface contact with the first taper shape of the inner chip on the pressure shaft. An inclined surface is provided, and an inclined surface that is in surface contact with the second tapered shape of the inner chip is provided on the outer chip, and the compression spring presses the pressure shaft, and the pressure shaft moves the inner chip. A torch for consumable electrode gas shield arc welding in which the inner tip presses the wire by pressing.   A consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire has a wire insertion hole in the axial center. A chip body, a chip case in contact with the chip body, an outer chip in contact with the chip case, a wire guide liner for guiding a wire inserted up in the wire feeding direction of the chip body, and the chip body A compression spring having a wire insertion hole at the center in the axial direction which is disposed inside the wire guide liner and abuts the lower end in the wire feeding direction of the wire guide liner, and the upper end abuts on the compression spring and enters the inside of the tip body. A pressing shaft having a wire insertion hole disposed at the lower end and extending to the lower inside of the chip case, and the pressing shaft and the outer chip. A first slit in the axial direction formed on the inner chip, and having a first tapered shape around the tip of the first chip, and the first chip of the inner chip A second slit is formed at a position orthogonal to the first slit from the side opposite to the tip side of the split, and a second taper shape is formed around the tip of the second slot. An inclined surface that is in surface contact with the first tapered shape of the inner tip is provided, and an inclined surface that is in surface contact with the second tapered shape of the inner tip is provided on the outer tip, and the compression spring causes the pressure shaft to be in contact with the first tapered shape. A torch for consumable electrode gas shield arc welding in which the pressurizing shaft presses the inner tip and the inner tip presses the wire.   A consumable electrode gas shield arc welding torch in which a wire insertion hole is formed in the axial center of the welding torch and the wire contacts the power feed tip to supply power to the wire has a wire insertion hole in the axial center. A chip main body, an outer chip in contact with the chip main body, a wire guide liner for guiding the wire inserted up to the wire feeding direction of the chip main body, and a wire guide liner disposed inside the chip main body. A compression spring having a wire insertion hole at the axial center in contact with the lower end of the wire feeding direction, and an upper end that is in contact with the compression spring and disposed inside the chip body, and a lower end that extends to the lower part of the chip body A pressure shaft having an extended wire insertion hole; and an inner chip pressed by the pressure shaft and the outer chip. The inner chip has a first axial direction. A slit is formed to have a first tapered shape around the tip of the first slot, and orthogonal to the first slot from the opposite side of the tip of the first chip of the inner chip. A second slit is formed at a position where the second slit is formed, a second taper shape is formed around the tip of the second slit, and the pressure shaft is in surface contact with the first taper shape of the inner chip. And providing an inclined surface in surface contact with the second tapered shape of the inner chip on the outer chip, the compression spring pressing the pressure shaft, and the pressure shaft serving as the inner chip. A torch for consumable electrode gas shield arc welding in which the inner tip presses the wire by pressing.

Images