Automatic welding wire feeder and controller thereof

Abstract

The utility model discloses an automatic welding wire feeder and a controller thereof, relates to the field of wire feeders, and adopts the technical scheme that the automatic welding wire feeder comprises a front driving wheel set and a rear driving wheel set which are distributed front and back; a first annular front wire feeding channel and a second annular front wire feeding channel are formed in the wheel surfaces of the two front rotating wheels; a first annular rear wire feeding channel and a second annular rear wire feeding channel are formed in the wheel surfaces of the two rear rotating wheels; the first annular front wire feeding channel and the first annular rear wire feeding channel are correspondingly distributed on the same side, and the second annular front wire feeding channel and the second annular rear wire feeding channel are correspondingly distributed on the same side; the minimum inner diameter of the first annular front wire feeding channel and the minimum inner diameter of the second annular rear wire feeding channel are smaller than the outer diameter of a welding wire. The minimum inner diameter of the second annular front wire feeding channel and the minimum inner diameter of the first annular rear wire feeding channel are larger than the outer diameter of a welding wire. The two welding wires can be fed at the same time very stably, and meanwhile interference between the two welding wires is avoided.

Description

Technical Field

[0001] The utility model relates to the field of wire feeding machines, in particular to an automatic wire feeding machine for welding wires and its controller. Background Art

[0002] A twin-wire wire feeding machine is a device for simultaneously feeding two welding wires. Its main structure is a wire feeding mechanism disclosed in a patent document with the publication number CN104439629A. The wire feeding mechanism uses relatively rotating wire feeding wheels to drive two welding wires to be fed simultaneously. Usually, the same wire feeding grooves are provided on the wheel surfaces of the wire feeding wheels, and the welding wires are threaded through the wire feeding grooves, and the two wire feeding grooves have the same specifications. This solution has a big problem. Because the two wire feeding grooves have the same specifications and drive two welding wires at the same time, if one of the welding wires moves out of the wire feeding groove due to reasons such as the thickness not meeting the specifications, it is very likely to interfere with the other welding wire, resulting in the wire feeding not being able to proceed smoothly. Summary of the Utility Model

[0003] To solve the above technical problems, the utility model provides an automatic wire feeding machine for welding wires, which can stably and smoothly realize the simultaneous wire feeding of two welding wires without interference with each other.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an automatic wire feeding machine for welding wires, including a front drive wheel group and a rear drive wheel group distributed front and rear;

[0005] The front drive wheel group includes two front rotating wheels arranged in parallel, and the wheel surfaces of the two front rotating wheels are provided with a first annular front wire feeding channel and a second annular front wire feeding channel;

[0006] The rear drive wheel group includes two rear rotating wheels arranged in parallel, and the wheel surfaces of the two rear rotating wheels are provided with a first annular rear wire feeding channel and a second annular rear wire feeding channel;

[0007] The first annular front wire feeding channel and the first annular rear wire feeding channel are distributed on the same side, and the second annular front wire feeding channel and the second annular rear wire feeding channel are distributed on the same side;

[0008] The minimum inner diameter of the first annular front wire feeding channel and the second annular rear wire feeding channel is smaller than the outer diameter of the welding wire;

[0009] The minimum inner diameter of the second annular front wire feeding channel and the first annular rear wire feeding channel is larger than the outer diameter of the welding wire.

[0010] This solution uses the front drive wheel group and the rear drive wheel group to simultaneously feed two welding wires;

[0011] The first annular front wire feeding channel and the second annular front wire feeding channel are jointly formed by the annular grooves on the wheel surfaces of two front rotating wheels, and the first annular rear wire feeding channel and the second annular rear wire feeding channel are jointly formed by the annular grooves on the wheel surfaces of two rear rotating wheels. One welding wire passes through the first annular front wire feeding channel and the first annular rear wire feeding channel in sequence, and the other welding wire passes through the second annular front wire feeding channel and the second annular rear wire feeding channel in sequence. It is equivalent that for each welding wire, there is a wire feeding channel with a minimum inner diameter smaller than the welding wire and a wire feeding channel with a minimum inner diameter larger than the welding wire. One wire feeding channel is used to guide the welding wire, and the other wire feeding channel is used to provide thrust to the welding wire. Thus, the two welding wires can be pushed synchronously, and the pushing process is more orderly.

[0012] Preferably, the first annular front wire feeding channel, the second annular front wire feeding channel, the first annular rear wire feeding channel, and the second annular rear wire feeding channel are V-shaped grooves. The V-grooves can better clamp and position the welding wire.

[0013] Preferably, anti-slip teeth are arranged in the grooves of the first annular front wire feeding channel and the second annular front wire feeding channel. It can improve the friction during pushing.

[0014] Preferably, the minimum inner diameter of the first annular front wire feeding channel and the second annular rear wire feeding channel is 1 mm. So as to clamp common welding wires.

[0015] Preferably, the minimum inner diameter of the second annular front wire feeding channel and the first annular rear wire feeding channel is 1.2 mm. So as to leave a gap for the welding wire to play a guiding role.

[0016] Preferably, a front wire guiding member and a rear wire guiding member are respectively arranged on the outer sides of the front driving wheel group and the rear driving wheel group. So as to guide the welding wire from the front and the rear.

[0017] Preferably, a middle wire guiding hole is arranged between the front driving wheel group and the rear driving wheel group. So as to support the welding wire in the middle and enable the welding wire to be pushed more stably.

[0018] Preferably, the front rotating wheel includes a front driving wheel and a front driven wheel, and the rear rotating wheel includes a rear driving wheel and a rear driven wheel. One of them is used as a driving wheel, which can better push the welding wire to move.

[0019] Preferably, the front driven wheel and the rear driven wheel are located on the same side. The front driven wheel is arranged on the front swing frame, one end of the front swing frame is hinged to the frame, the rear driven wheel is arranged on the rear swing frame, one end of the rear swing frame is hinged to the frame, and both ends of the telescopic rod are respectively hinged to the other end of the front swing frame and the other end of the rear swing frame. The front driven wheel and the rear driven wheel are located inside the front swing frame and the rear swing frame. The relative angle between the front swing frame and the rear swing frame can be adjusted through the telescopic rod, that is, the distance between the front driven wheel and the front driving wheel, and the rear driven wheel and the rear driving wheel can be changed, so as to adapt to welding wires in a larger size range.

[0020] A controller of an automatic welding wire feeding machine, characterized in that: it includes a main switch for controlling the current of the arc, the front driving wheel group and the rear driving wheel group, and a time delay device is arranged between the main switch and the arc.

[0021] The time delay device can delay the arc shutdown time, so that after melting a few millimeters at the front end of the welding wire, the arc stops working.

[0022] The beneficial effects of the present utility model:

[0023] This solution can very stably and smoothly realize the simultaneous feeding of two welding wires, and there will be no interference between them. If the rotational speeds of the driving wheel groups are the same, the feeding speeds of the welding wires can also be easily synchronized, and the wire feeding process is more stable. It can not only feed two wires but also a single wire. By setting the time delay device, after melting a few millimeters at the front end of the welding wire, the arc stops working, avoiding the problem of sticking welding wires. Description of the drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are only four of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of an embodiment of the present utility model;

[0026] Figure 2 It is a positional relationship diagram of the front driving wheel group and the rear driving wheel group of an embodiment of the present utility model;

[0027] Figure 3 It is a positional relationship diagram of the first annular front wire feeding channel, the second annular front wire feeding channel, the first annular rear wire feeding channel and the second annular rear wire feeding channel of an embodiment of the present utility model;

[0028] Figure 4 It is a schematic diagram of the controller of the present utility model.

[0029] Among them, 1. front driven wheel; 2. front driving wheel; 3. front driving wheel group; 4. rear driven wheel; 5. rear driving wheel; 6. rear driving wheel group; 7. first annular front wire feeding channel; 8. second annular front wire feeding channel; 9. first annular rear wire feeding channel; 10. second annular rear wire feeding channel; 11. front wire guiding member; 12. rear wire guiding member; 13. middle wire guiding member; 14. front swing frame; 15. rear swing frame; 16. telescopic rod. Specific embodiments

[0030] In order to deepen the understanding of the present utility model, the present utility model will be further described in detail below with reference to the drawings and embodiments. The embodiments are only used to explain the present utility model and do not limit the protection scope of the present utility model.

[0031] Embodiment

[0032] As Figure 1 shown, an automatic wire feeder for welding wire includes a front driving wheel group 3 and a rear driving wheel group 6 which are distributed front and rear; the front driving wheel group 3 includes two front runners arranged in parallel, and the wheel surfaces of the two front runners are provided with a first annular front wire feeding channel 7 and a second annular front wire feeding channel 8; the rear driving wheel group 6 includes two rear runners arranged in parallel, and the wheel surfaces of the two rear runners are provided with a first annular rear wire feeding channel 9 and a second annular rear wire feeding channel 10; combined Figure 2 and Figure 3 shown, the first annular front wire feeding channel 7 and the first annular rear wire feeding channel 9 are distributed on the same side, and the second annular front wire feeding channel 8 and the second annular rear wire feeding channel 10 are distributed on the same side; the minimum inner diameter of the first annular front wire feeding channel 7 and the second annular rear wire feeding channel 10 is smaller than the outer diameter of the welding wire; the minimum inner diameter of the second annular front wire feeding channel 8 and the first annular rear wire feeding channel 9 is larger than the outer diameter of the welding wire.

[0033] This solution uses the front driving wheel group 3 and the rear driving wheel group 6 to feed two welding wires simultaneously;

[0034] The first annular front wire feeding channel 7 and the second annular front wire feeding channel 8 are jointly formed by the annular grooves on the wheel surfaces of the two front runners, and the first annular rear wire feeding channel 9 and the second annular rear wire feeding channel 10 are jointly formed by the annular grooves on the wheel surfaces of the two rear runners. One welding wire passes through the first annular front wire feeding channel 7 and the first annular rear wire feeding channel 9 in sequence, and the other welding wire passes through the second annular front wire feeding channel 8 and the second annular rear wire feeding channel 10 in sequence. It is equivalent that each welding wire has a wire feeding channel with a minimum inner diameter smaller than the welding wire and a wire feeding channel with a minimum inner diameter larger than the welding wire. One wire feeding channel is used to guide the welding wire, and the other wire feeding channel is used to provide a thrust to the welding wire. Thus, the two welding wires can be synchronously pushed, and the pushing process is more orderly.

[0035] The first annular front wire feeding channel 7, the second annular front wire feeding channel 8, the first annular rear wire feeding channel 9 and the second annular rear wire feeding channel 10 are V-shaped grooves. The V-shaped grooves can better clamp and position the welding wire.

[0036] Anti-slip teeth are provided in the grooves of the first annular front wire feeding channel 7 and the second annular front wire feeding channel 8. This can increase the friction during pushing.

[0037] The minimum inner diameter of the first annular front wire feeding channel 7 and the second annular rear wire feeding channel 10 is 1 mm. This is to clamp common welding wires.

[0038] The minimum inner diameter of the second annular front wire feeding channel 8 and the first annular rear wire feeding channel 9 is 1.2 mm. This is to leave a gap for the welding wire to play a guiding role.

[0039] Front wire guiding members 11 and rear wire guiding members 12 are respectively provided on the outer sides of the front driving wheel set 3 and the rear driving wheel set 6. This is to guide the welding wire before and after.

[0040] A middle wire guiding hole is provided between the front driving wheel set 3 and the rear driving wheel set 6. This is to support the welding wire in the middle so that the welding wire can be pushed more stably.

[0041] The front rotating wheel includes a front driving wheel 2 and a front driven wheel 1, and the rear rotating wheel includes a rear driving wheel 5 and a rear driven wheel 4. One of them serves as a driving wheel to better push the welding wire to move.

[0042] The front driven wheel 1 and the rear driven wheel 4 are located on the same side. The front driven wheel 1 is arranged on the front swing frame 14. One end of the front swing frame 14 is hinged to the frame. The rear driven wheel 4 is arranged on the rear swing frame 15. One end of the rear swing frame 15 is hinged to the frame. Both ends of the telescopic rod 16 are respectively hinged to the other end of the front swing frame 14 and the other end of the rear swing frame 15. The front driven wheel 1 and the rear driven wheel 4 are located inside the front swing frame 14 and the rear swing frame 15. The relative angle of the front swing frame 14 and the rear swing frame 15 can be adjusted through the telescopic rod 16, that is, the distances between the front driven wheel 1 and the front driving wheel 2, and between the rear driven wheel 4 and the rear driving wheel 5 can be changed to adapt to welding wires in a larger size range. The hinge points of the front swing frame 14 and the rear swing frame 15 deviate outward to better drive the front driven wheel 1 and the rear driven wheel 4 to swing.

[0043] Combined Figure 4 As shown, a controller of an automatic welding wire feeding machine includes a main switch for controlling the current of the arc, the front driving wheel set 3 and the rear driving wheel set 6. A time delay device is provided between the main switch and the arc.

[0044] The arc shutdown time can be delayed by a timer so that after the front end of the welding wire is melted by a few millimeters, the arc stops working. Specifically, a delay of 1 - 10 s can avoid the problem of welding wire sticking.

[0045] The beneficial effects of the present utility model are:

[0046] This solution can stably and smoothly realize the simultaneous wire feeding of two welding wires, and there will be no interference between them. If the driving wheel sets rotate at the same speed, the wire feeding speeds of the welding wires can also be easily synchronized, and the wire feeding process is more stable. It can not only feed two wires but also a single wire. By setting a timer, after the front end of the welding wire is melted by a few millimeters, the arc stops working, avoiding the problem of welding wire sticking.

[0047] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0048] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An automatic welding wire feeder, characterized in that: It comprises a front driving wheel set (3) and a rear driving wheel set (6) which are distributed front and rear; The front driving wheel set (3) comprises two front rotating wheels arranged in parallel, and the wheel surfaces of the two front rotating wheels are provided with a first annular front wire feeding groove (7) and a second annular front wire feeding groove (8); The rear driving wheel set (6) comprises two rear rotating wheels arranged in parallel, and the wheel surfaces of the two rear rotating wheels are provided with a first annular rear wire feeding groove (9) and a second annular rear wire feeding groove (10); The first annular front wire feeding groove (7) and the first annular rear wire feeding groove (9) are distributed on the same side, and the second annular front wire feeding groove (8) and the second annular rear wire feeding groove (10) are distributed on the same side; The minimum inner diameters of the first annular front wire feeding groove (7) and the second annular rear wire feeding groove (10) are smaller than the outer diameter of the welding wire; The minimum inner diameters of the second annular front wire feeding groove (8) and the first annular rear wire feeding groove (9) are greater than the outer diameter of the welding wire.

2. The automatic welding wire feeder according to claim 1, characterized in that: The first annular front wire feeding groove (7), the second annular front wire feeding groove (8), the first annular rear wire feeding groove (9) and the second annular rear wire feeding groove (10) are V-shaped grooves.

3. The automatic welding wire feeder according to claim 1, characterized in that: Anti-slip teeth are arranged in the grooves of the first annular front wire feeding groove (7) and the second annular front wire feeding groove (8).

4. The automatic welding wire feeder according to claim 1, characterized in that: The minimum inner diameters of the first annular front wire feeding groove (7) and the second annular rear wire feeding groove (10) are 1 mm.

5. The automatic welding wire feeder according to claim 1, characterized in that: The minimum inner diameters of the second annular front wire feeding groove (8) and the first annular rear wire feeding groove (9) are 1.2 mm.

6. The automatic welding wire feeder according to claim 1, characterized in that: A front wire guide (11) and a rear wire guide (12) are respectively arranged on the outer sides of the front driving wheel set (3) and the rear driving wheel set (6).

7. The automatic welding wire feeder according to claim 1, characterized in that: A central wire guide hole is provided between the front driving wheel set (3) and the rear driving wheel set (6).

8. The automatic welding wire feeder according to claim 1, characterized in that: The front rotating wheel comprises a front driving wheel (2) and a front driven wheel (1), and the rear rotating wheel comprises a rear driving wheel (5) and a rear driven wheel (4).

9. The automatic welding wire feeder according to claim 8, characterized in that: The front driven wheel (1) and the rear driven wheel (4) are located on the same side, the front driven wheel (1) is arranged on a front swing frame (14), one end of the front swing frame (14) is hinged to the frame, the rear driven wheel (4) is arranged on a rear swing frame (15), one end of the rear swing frame (15) is hinged to the frame, the two ends of the telescopic rod (16) are respectively hinged to the other end of the front swing frame (14) and the other end of the rear swing frame (15), and the front driven wheel (1) and the rear driven wheel (4) are located on the inner sides of the front swing frame (14) and the rear swing frame (15).

10. A controller for an automatic welding wire feeder, used to control the automatic welding wire feeder according to claim 1, characterized in that: It comprises a main switch for controlling the electric arc, the current of the front driving wheel set (3) and the rear driving wheel set (6), and a time delay device is arranged between the main switch and the electric arc.

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