A welding torch

Abstract

A kind of welding torch, including power connection cavity, handle, the power connection cavity is connected with handle by gun tube, heating negative pole line is located in the handle in the one end of swan neck pipe, welding nozzle is located in the other end of swan neck pipe, the welding nozzle is connected with positive pole pipe in swan neck pipe, welding wire between welding nozzle and heating negative pole line forms short circuit and realizes to 300 ℃-500 ℃ for welding wire heating for welding.It has beneficial effects: preheating is carried out to welding wire, heating formation is long, can effectively improve welding efficiency, preheated welding wire is more easily sent, avoid the loss of friction with handle, by longer heating formation, preheating is carried out to air supply, reduce spatter and porosity, enhance welding effect and improve welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding machine components, and in particular to a welding torch. Background Technology

[0002] The core working mechanism of an electric welding gun is to heat the welding wire by short-circuiting the power supply, which is then used for welding. In existing technology, the short circuit is achieved only by directly connecting the positive and negative terminals of the power supply to the welding nozzle. However, this structure has the following drawbacks:

[0003] 1. The heating period is short, requiring the welding wire to be heated and melted in a short time, which increases energy consumption and welding nozzle load without changing efficiency.

[0004] 2. The heating period is short, requiring the welding wire to be heated and melted in a short time. With the energy consumption remaining the same, the wire feeding speed will be significantly reduced, affecting the welding speed.

[0005] 3. Gas needs to be supplied through a gas pipe during the electric welding process, and this structure also has the two defects mentioned above in terms of gas heating.

[0006] 4. The end of the welding torch has a curved structure. If the welding wire is hard and has not been softened by heating, it will cause wear to the welding torch handle. Utility Model Content

[0007] The purpose of this invention is to solve the aforementioned problems by designing a welding torch. The design concept is to increase the stroke length of the welding wire during short-circuit heating, i.e., to increase the distance between the positive and negative electrodes connected to the welding wire. More specifically, the problems to be solved include how to determine the position of the negative electrode after increasing the heating stroke, how to design the structure for the electrical connection between the negative electrode and the welding wire, and how to solve the insulation problem between the heating positive and negative electrodes caused by the increased stroke. The specific design scheme is as follows:

[0008] A welding torch includes an electrical receiving cavity and a handle. The handle is the actual working part of the welding torch. The electrical receiving cavity and the handle are connected through a barrel. The heating negative electrode wire in the handle is located at one end of a gooseneck tube, and the welding nozzle is located at the other end of the gooseneck tube. The welding nozzle is connected to a positive electrode tube inside the gooseneck tube. A short circuit is formed between the welding nozzle and the heating negative electrode wire to heat the welding wire to 300℃-500℃ for welding.

[0009] The receiving cavity is used to connect to the power supply and the wire feeder. The receiving cavity is fixed to the wire feeder. The welding wire on the wire feeder's reel passes sequentially through the receiving cavity, the gun barrel, the handle, the gooseneck tube, and the welding nozzle. A positive wire and a control wire are connected between the power supply and the wire feeder. Both the positive conductive tube and the negative wire are connected from the wire feeder to the receiving cavity. The positive conductive tube is connected to the positive tube. Specifically, the gun barrel contains a wire feed tube. One end of the positive conductive tube is connected from the wire feeder, and the other end is embedded in the end of the receiving cavity. The inner ring of the positive conductive tube is inserted into the outer ring of one end of the positive tube, thus achieving electrical connection between the positive tubes. One end of the positive tube... It also abuts against an insulating block, which is used to prevent short circuits in the electrical connection between the positive electrode tube and other parts of the wire feeder. The control line, air guide tube, and heating negative electrode wire are embedded in the electrical connection cavity from the side wall of the electrical connection cavity. The control line and heating negative electrode wire are located outside the positive electrode tube and extend along the barrel to the handle. They are insulated from the positive electrode tube by the insulating sleeves on their outer sheaths. The wire feed tube is located inside the positive electrode tube, and the welding wire is located inside the wire feed tube. The wire feed tube is used to insulate the welding wire from the positive electrode tube before it enters the gooseneck tube. The positive electrode conductive tube is directly led out from the wire feeder and is no longer led out separately from the power supply. The power supply model includes TW-IC X5, and the wire feeder model includes TW-X5. The control line is used to supply power to the wire feeder, realize the opening and closing of the wire feeder, and realize the control of the wire feeding speed.

[0010] The heating negative electrode wire is connected to the welding wire via a negative electrode set wire. The negative electrode set wire sequentially passes through the contact coil at the end of the heating negative electrode wire, the negative electrode set wire insulating sleeve, the conductive positive electrode, and the negative electrode insulating sleeve, abutting against the negative electrode conductive tube fitted on the welding wire. The positive electrode conductive tube and the heating negative electrode wire are all covered with insulating sheaths, and electrical connection is achieved only at the end via the contact coil. The negative electrode set wire insulating sleeve prevents the conductive positive electrode from contacting the heating negative electrode wire to avoid a short circuit. The negative electrode insulating sleeve also prevents the negative electrode conductive tube from contacting the conductive positive electrode to avoid a short circuit. The negative electrode conductive tube ensures a sufficient electrical connection between the negative electrode set wire and the welding wire. One end of the conductive positive electrode is electrically connected to the positive electrode tube. The other end is electrically connected to one end of the gooseneck tube. Specifically, one end of the conductive positive electrode abuts against the positive electrode tube, and one end of the gooseneck tube is embedded in the other end of the conductive positive electrode. The two ends of the conductive positive electrode are two separate parts, which are connected by a connecting ring. A positive electrode insulating ring is set inside the connecting ring. The purpose of setting the conductive positive electrode into two parts and connecting them through the connecting ring is to separate the gooseneck tube from the handle without disassembling the handle. Due to the high position of the welding wire during heating, the gooseneck tube and welding nozzle will be damaged after a certain period of use. They are consumables and need to be replaced regularly. This design facilitates the disassembly and replacement of the gooseneck tube.

[0011] The gooseneck tube is equipped with a wire feeding insulating tube, which is used to prevent the welding wire from the gooseneck tube from being electrically disconnected from the gooseneck tube. One end of the wire feeding insulating tube is inserted and connected to the positive electrode insulating ring, and the other end of the gooseneck tube is electrically connected to the positive electrode through insertion. The end of the positive electrode is electrically connected to the welding nozzle through insertion, and the wire feeding insulating tube is embedded in the positive electrode.

[0012] The welding nozzle is electrically connected to the end of the welding wire. After the positive electrode is drawn from the wire feeder, it passes through the positive conductive tube, the positive tube, the conductive positive electrode, the gooseneck tube, the positive terminal, and the welding nozzle in sequence to achieve electrical connection with the welding wire at the welding nozzle. Furthermore, the welding nozzle and the welding wire are connected in sequence through the insulating block, the wire feed tube, the negative electrode insulating sleeve, the positive electrode insulating ring, and the wire feed insulating tube to prevent short circuits before electrical connection between the welding nozzle and the welding wire. At the same time, the negative electrode top wire insulating sleeve prevents short circuits between the positive and negative electrodes at the top wire.

[0013] The handle contains a controller and a switch. The control line is electrically connected to the controller. This design is the same as the existing welding torch for controlling the wire feeder and heating. When the switch is pressed, the wire feeder starts feeding wire, and the positive line starts supplying power to achieve short-circuit heating of the welding wire.

[0014] The positive terminal and the gooseneck tube are covered with heat insulation sleeves. The positive terminal consists of two interlocking metal tubes, and both metal tubes of the positive terminal are covered with heat insulation sleeves. The welding nozzle is located inside the heat insulation sleeves. The part from the negative electrode set wire to the positive terminal of the welding nozzle is the part that actually heats the welding wire through a short circuit. Because the temperature of this part is high, heat insulation material is required as the outer shell to prevent the operator from being burned or damaging other parts.

[0015] The welding torch obtained through the above-described technical solution of this utility model has the following beneficial effects:

[0016] 1. Preheating the welding wire to create a heating element can effectively improve welding efficiency.

[0017] 2. The preheated and softened welding wire is easier to feed, avoiding wear and tear from friction with the handle.

[0018] 3. By preheating the gas supply through a longer heating period, spatter and porosity are reduced, enhancing the welding effect and improving welding efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the welding torch of this utility model after being connected to the power supply and wire feeder;

[0020] Figure 2 This is a schematic diagram of the structure of the section from the electrical cavity to the welding nozzle described in this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the electrical cavity described in this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the handle described in this utility model;

[0023] Figure 5 This is a cross-sectional structural diagram of the welding nozzle described in this utility model.

[0024] In the diagram, 1. Barrel; 2. Heating negative wire; 3. Gooseneck tube; 4. Welding nozzle; 5. Positive tube; 6. Welding wire; 7. Power supply; 8. Wire feeder; 9. Positive wire; 10. Control wire; 11. Positive conductive tube; 12. Feeding negative wire; 13. Connecting cavity; 14. Heat insulation sleeve; 15. Handle; 16. Negative set screw; 17. Connecting coil; 18. Negative set screw insulating sleeve; 19. Conductive positive electrode; 20. Negative insulating sleeve; 21. Negative conductive tube; 22. Switch; 23. Wire feeding insulating tube; 24. Wire feeding tube; 25. Insulating block; 26. Gas guide tube; 27. Positive insulating ring; 28. Positive end; 29. ​​Connecting ring; 30. Controller. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] A welding torch includes an electrical receiving cavity 13 and a handle 15. The handle 15 is the actual working part of the welding torch. The electrical receiving cavity 13 and the handle 15 are connected through a barrel 1. The heating negative electrode 2 in the handle 15 is located at one end of a gooseneck tube 3, and the welding nozzle 4 is located at the other end of the gooseneck tube 3. The welding nozzle 4 is connected to a positive electrode 5 inside the gooseneck tube 3. The welding wire 6 located between the welding nozzle 4 and the heating negative electrode 2 forms a short circuit to heat the welding wire 6 for welding.

[0027] The electrical receiving cavity 13 is used to connect to the power supply 7 and the wire feeder 8. The electrical receiving cavity 13 is fixed to the wire feeder 8. The welding wire 6 on the wire spool of the wire feeder 8 passes through the electrical receiving cavity 13, the gun barrel 1, the handle 15, the gooseneck tube 3, and the welding nozzle 4 in sequence. A positive wire 9 and a control wire 10 are connected between the power supply 7 and the wire feeder 8. The positive conductive tube 11 and the negative conveying wire 12 are both connected from the wire feeder 8 and into the electrical receiving cavity 13. The positive conductive tube 11 is connected to the positive tube 5. Specifically, the gun barrel 1 has a wire feeding tube 24 inside. One end of the positive conductive tube 11 is connected from the wire feeder 8, and the other end is embedded in the end of the electrical receiving cavity 13. The inner ring of the positive conductive tube 11 is inserted and connected to the outer ring of one end of the positive tube 5, thereby realizing the electrical connection between the positive tube 5 and the positive conductive tube 11. One end also abuts against the insulating block 25, which is used to prevent short circuits in the electrical connection between the positive electrode tube 5 and other parts of the wire feeder 8. The control line 10, the air guide tube 26, and the heating negative electrode line 2 are embedded in the electrical receiving cavity 13 from the side wall of the electrical receiving cavity 13. The control line 10 and the heating negative electrode line 2 are both located outside the positive electrode tube 5 and extend along the barrel 1 to the handle 15. They are insulated from the positive electrode tube 5 by the insulating rubber sleeves on the outer sheaths of the control line 10 and the heating negative electrode line 2. The wire feeding tube 24 is located inside the positive electrode tube 5, and the welding wire 6 is located inside the wire feeding tube 24. The wire feeding tube 24 is used to insulate the welding wire 6 from the positive electrode tube 5 before it enters the gooseneck tube 3. The positive conductive tube 11 is directly led out from the wire feeder 8 and is no longer led out separately from the power supply 7. The power supply model includes TW-IC. X5, the model of the wire feeder includes TW-X5, the control line 10 is used to supply power to the wire feeder 8, realize the opening and closing of the wire feeder 8, and realize the control of the wire feeding speed of the welding wire 6.

[0028] The heating negative electrode wire 2 is connected to the welding wire 6 via a negative electrode set screw 16. The negative electrode set screw 16 passes sequentially through the contact coil 17 at the end of the heating negative electrode wire 2, the negative electrode set screw insulating sleeve 18, the conductive positive electrode 19, and the negative electrode insulating sleeve 20, and abuts against the negative electrode conductive tube 21 sleeved on the welding wire 6. The positive electrode conductive tube 11 and the heating negative electrode wire 2 are all covered with insulating sleeves, and electrical connection is achieved only at the end through the contact coil 17. The negative electrode set screw insulating sleeve 18 prevents the conductive positive electrode 19 from contacting the heating negative electrode wire 2 and thus preventing a short circuit. The negative electrode insulating sleeve 20 prevents the negative electrode conductive tube 21 from contacting the conductive positive electrode 19 and thus preventing a short circuit. The negative electrode conductive tube 21 achieves a sufficient electrical connection between the negative electrode set screw 16 and the welding wire 6. One end of the conductive positive electrode 19 is electrically connected to the positive electrode tube 5. The other end of the conductive positive electrode 19 is electrically connected to one end of the gooseneck tube 3. Specifically, one end of the conductive positive electrode 19 abuts against the positive electrode tube 5, and one end of the gooseneck tube 3 is embedded in the other end of the conductive positive electrode 19. The two ends of the conductive positive electrode 19 are two separate parts, which are connected by a connecting ring 29. A positive electrode insulating ring 27 is set inside the connecting ring. The purpose of setting the conductive positive electrode 19 into two parts and connecting them through the connecting ring 17 is to separate the gooseneck tube from the handle 15 without disassembling the handle 15. Due to the high position when the welding wire is heated, the gooseneck tube and welding nozzle will be damaged after a certain period of use. They are consumables and need to be replaced regularly. This design facilitates the disassembly and replacement of the gooseneck tube.

[0029] The gooseneck tube 3 is provided with a wire feeding insulating tube 23. The wire feeding insulating tube 23 is used to prevent the welding wire at the gooseneck tube 3 from short-circuiting with the electrical connection of the gooseneck tube. One end of the wire feeding insulating tube 23 is inserted and connected to the positive electrode insulating ring 27. The other end of the gooseneck tube 3 is electrically connected to the positive electrode 28 by insertion. The end of the positive electrode 28 is electrically connected to the welding nozzle 4 by insertion. The wire feeding insulating tube 23 is embedded in the positive electrode 28.

[0030] The welding nozzle 4 is electrically connected to the end of the welding wire 6. After the positive electrode is drawn from the wire feeder 8, it passes through the positive conductive tube 11, the positive tube 5, the conductive positive electrode 19, the gooseneck tube 3, the positive end 28, and the welding nozzle 4 in sequence to achieve electrical connection with the welding wire 6 at the welding nozzle 4. Furthermore, the short circuit before the welding nozzle 4 and the welding wire 6 are achieved is prevented by the insulating block 25, the wire feed tube 24, the negative electrode insulating sleeve 20, the positive electrode insulating ring 27, and the wire feed insulating tube 23 in sequence. At the same time, the negative electrode top wire insulating sleeve 18 prevents a short circuit between the positive and negative electrodes at the top wire.

[0031] The handle 15 is equipped with a controller 30 and a switch 22. The control line 10 is electrically connected to the controller 30. This design is the same as the control of the wire feeder and heating by the existing welding gun. When the switch 22 is pressed, the wire feeder starts to feed the wire, and the positive line 9 starts to supply power to realize the short-circuit heating of the welding wire 6.

[0032] The positive terminal 28 and the gooseneck tube 3 are covered with a heat insulation sleeve 14. The positive terminal 28 consists of two interlocking metal tubes. Both metal tubes of the positive terminal 28 are covered with heat insulation sleeves 14. The welding nozzle 4 is located inside the heat insulation sleeve 14. The section from the negative electrode set wire 16 to the positive terminal 28 of the welding nozzle is the part that actually heats the welding wire 6 by breaking the circuit. Since the temperature of this part is high, heat insulation material is needed as the outer shell to prevent the operator from being burned or the welding workpiece from being damaged by high temperature.

[0033] In terms of operation and working mechanism, this utility model is basically the same as the existing welding torch. The isomorphic control line 10 is electrically connected to the controller 30 in the handle, and the operation of the switch 22 realizes the switching on and off of the wire feeder and the positive power supply required for heating, thereby realizing synchronous wire feeding and heating of the welding wire 6. However, the length of the heated welding wire 6 has been increased from only at the welding nozzle 4 to from the welding nozzle 4 to the handle 15, that is, the heating of the welding wire 6 has already started inside the gooseneck tube.

[0034] In terms of heating the welding wire, the existing process directly connects the positive and negative power supply at the welding nozzle 4 to the welding wire 6, forming a short circuit to achieve heating.

[0035] Compared to existing welding torches, the welding wire 6 of the welding torch of this invention is electrically connected to the heating negative wire 2 via the negative electrode set wire 16 when it passes through the negative electrode conductive tube 21. It is then electrically connected to the positive electrode voltage output by the wire feeder 8 at the welding nozzle 4, thus achieving a short circuit and heating. Furthermore, the short circuit is prevented before the welding nozzle 4 and the welding wire 6 are electrically connected by the insulating block 25, the wire feed tube 24, the negative electrode insulating sleeve 20, the positive electrode, the insulating ring 27, and the wire feed insulating tube 23. At the same time, the negative electrode set wire insulating sleeve 18 prevents a short circuit between the positive and negative electrodes at the set wire.

[0036] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A welding torch, comprising an electrical receiving cavity (13) and a handle (15), wherein the electrical receiving cavity (13) and the handle (15) are connected via a barrel (1), characterized in that, The heating negative electrode wire (2) in the handle (15) is located at one end of the gooseneck tube (3), and the welding nozzle (4) is located at the other end of the gooseneck tube (3). The welding nozzle (4) is connected to the positive electrode tube (5) inside the gooseneck tube (3). The welding wire (6) located between the welding nozzle (4) and the heating negative electrode wire (2) forms a short circuit to heat the welding wire (6) for welding.

2. The welding torch according to claim 1, characterized in that, The electrical receiving cavity (13) is fixed on the wire feeder (8). The welding wire (6) on the wire spool of the wire feeder (8) passes through the electrical receiving cavity (13), the gun barrel (1), the handle (15), the gooseneck tube (3), and the welding nozzle (4) in sequence. The power supply (7) is connected to the wire feeder (8) by a positive line (9) and a control line (10). The positive conductive tube (11) and the negative transmission line (12) are both connected from the wire feeder (8) and into the electrical receiving cavity (13). The positive conductive tube (11) is connected to the positive tube (5).

3. The welding torch according to claim 1, characterized in that, The heating negative electrode wire (2) is connected to the welding wire (6) through the negative electrode set wire (16). The negative electrode set wire (16) passes through the junction ring (17), the negative electrode set wire insulating sleeve (18), the conductive positive electrode (19), and the negative electrode insulating sleeve (20) at the end of the heating negative electrode wire (2) in sequence and abuts against the negative electrode conductive tube (21) sleeved on the welding wire (6). One end of the conductive positive electrode (19) is electrically connected to the positive electrode tube (5), and the other end of the conductive positive electrode (19) is electrically connected to one end of the gooseneck tube (3).

4. The welding torch according to claim 1, characterized in that, The gooseneck tube (3) is provided with a wire feeding insulating tube (23). The other end of the gooseneck tube (3) is electrically connected to the positive terminal (28). The end of the positive terminal (28) is electrically connected to the welding nozzle (4). The wire feeding insulating tube (23) is embedded in the positive terminal (28).

5. The welding torch according to claim 2, characterized in that, The welding nozzle (4) is electrically connected to the end of the welding wire (6). The handle (15) is equipped with a controller (30) and a switch (22). The control line (10) is electrically connected to the controller (30). This design is the same as the existing welding gun for controlling the wire feeder and heating. When the switch (22) is pressed, the wire feeder starts to feed the wire, and the positive line (9) starts to supply power to achieve short-circuit heating of the welding wire (6).

6. The welding torch according to claim 4, characterized in that, The positive end (28) and the gooseneck tube (3) are covered with a heat insulation sleeve (14), and the welding nozzle (4) is located inside the heat insulation sleeve (14).

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