Swing integrated welding gun

Abstract

The utility model discloses a swing integrated welding gun, and belongs to the technical field of welding. A transition body is fixed at one end of the six-axis mechanism; and the transition body is connected with a quick-change head. The quick-change head comprises a fixed body which is in butt joint with the end part of the transition body, and a rotating body which is used for pressing the fixed body on the transition body; a welding pin is fixed on the fixing body, and the rotating body is detachably connected with the transition body. According to the utility model, the multi-degree-of-freedom movement mechanism is used for simulating a manual swinging skill and is matched with the movement executing mechanism, so that swinging backing welding can be realized in a full-automatic manner, and an efficient, stable and reliable backing welding effect can be realized; a tungsten needle, a tile nozzle and other consumable products of the welding gun are designed into a quick-change module, automatic replacement is supported, it is guaranteed that the working rhythm of full-automatic welding is not affected by replacement of quick-wear parts, and it is guaranteed that the welding gun is in an efficient welding state all the time.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, specifically to a swinging integrated welding gun. Background Art

[0002] Base welding is a key link in multi-layer and multi-pass welding of medium and thick plates, and has a vital impact on joint performance. Since the TIG welding process has good heat input control capabilities, the swing TIG process is often used for base welding in the groove butt welding of medium and thick plates. After adding the swing process to TIG welding, the melt width can be increased, the number of welds can be reduced, thereby reducing welding defects, and the resulting weld shape is beautiful and uniform. In addition, studies have shown that under the same conditions, compared with the TIG welding process without swing, the TIG swing welding process changes the molten pool flow and temperature field, thereby affecting the weld microstructure and improving the joint mechanical properties of some materials.

[0003] Due to the complexity of multi-layer and multi-pass welding of thick plates, and the popularity of automatic welding and digital welding machines, early TIG swing welding generally relied on professional welders to achieve it through manual skills, that is, the welding gun nozzle was directly pressed into the groove of the pipe wall and swung greatly, using the friction between the nozzle and the two sides of the groove to move forward. The swing route was a regular path formed according to the specific shape of the groove to swing the welding process, thus obtaining a weld with beautiful appearance and excellent quality.

[0004] However, the above method has high requirements on workers' operation skills and proficiency, and workers need a long time to learn and master it; even for skilled workers, long-term welding will easily cause fatigue, and stable and reliable quality control cannot be formed. Utility Model Content

[0005] The utility model aims to provide a swinging integrated welding gun, which can imitate manual swinging skills by means of a multi-degree-of-freedom motion mechanism, reduce technical requirements for workers and improve welding quality.

[0006] The utility model adopts the following technical scheme: a swinging integrated welding gun comprises a six-axis mechanism, one end of which is fixed with a transition body; the transition body is connected with a quick-change head, and a welding needle is fixed on the quick-change head.

[0007] Preferably, the quick-change head comprises a fixed body docked at the end of the transition body, and a rotating body used to press the fixed body onto the transition body; the welding needle is fixed on the fixed body, and the rotating body is detachably connected to the transition body.

[0008] Preferably: a symmetrical slideway is provided on the circumferential surface of the transition body close to one end of the rotating body, a slideway opening is provided at one end of the slideway, and a positioning pit is provided at the other end of the slideway;

[0009] A sliding block symmetrically matched with the slideway is fixed to one end of the rotating body close to the transition body, and a positioning bead matched with the positioning pit is installed on the inner side of the sliding block.

[0010] Preferably: a step is provided at the position where the end of the transition body is connected to the slideway opening; the upper end of the fixed body has two positioning protrusions that cooperate with the step;

[0011] The lower edge of the slideway on one side of the slideway close to the rotating body is arranged inclined.

[0012] Preferably: the rotating body is a hollow structure, and the fixed body is sleeved in the rotating body; one end of the fixed body away from the transition body extends out of the rotating body, and the stopper on the rotating body presses on the shoulder on the fixed body.

[0013] Preferably: the transition body is installed with a first split cable, a first split coolant pipe and a first split protective air pipe; the fixed body is installed with a second split cable, a second split coolant pipe and a second split protective air pipe; when the fixed body is docked with the transition body, the first split cable is docked with the second split cable, the first split coolant pipe is docked with the second split coolant pipe, and the first split protective air pipe is docked with the second split protective air pipe.

[0014] Preferably: a flange seat is fixed to one end of the six-axis mechanism away from the transition body; a connecting piece is fixed to one side of the flange seat, and a wire feeding mechanism cooperating with the welding needle is installed on the connecting piece.

[0015] Preferably, the six-axis mechanism comprises six telescopic electric cylinders, and the six telescopic electric cylinders are respectively hinged between the flange seat and the transition body.

[0016] The beneficial effects of the utility model are:

[0017] With the help of multi-degree-of-freedom motion mechanism to imitate manual swinging skills, combined with motion actuator, swinging root welding can be realized in a fully automatic way, which can achieve efficient, stable and reliable root welding effect;

[0018] The welding gun’s tungsten needle, nozzle and other consumable parts are designed as quick-change modules to support automatic replacement, ensuring that the working rhythm of fully automatic welding is not affected by the replacement of consumable parts and that the welding gun is always in a state of efficient welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The utility model is a structural schematic diagram of a swinging integrated welding gun.

[0021] Figure 2 for Figure 1 Enlarged view of the middle transition body and quick-change head.

[0022] Figure 3 It is a structural schematic diagram of the transition body and the quick-change head being separated.

[0023] Figure 4 It is a structural schematic diagram of the connection state of the transition body and the quick-change head.

[0024] Explanation of the accompanying drawings: 1. Flange seat; 2. Six-axis mechanism; 3. Transition body; 301. Slide; 302. Slide mouth; 303. Positioning pit; 304. Step; 305. Lower edge of slide; 4. Quick-change head; 401. Rotating body; 4011. Sliding block; 4012. Positioning bead; 4013. Stop platform; 402. Fixed body; 4021. Shoulder; 4022. Positioning protrusion; 5. Welding needle; 6. Connector; 7. Wire feeding mechanism. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Combination Figure 1 and Figure 2 As shown, the six-axis mechanism 2 includes six telescopic electric cylinders, which are respectively hinged between the flange seat 1 and the transition body 3. The transition body 3 is detachably connected to the quick-change head 4, and the welding needle 5 is fixed on the quick-change head 4. The flange seat 1 can be installed at the end of a device such as a robotic arm, and is the basic part of the entire welding gun. By controlling the six telescopic electric cylinders, the welding needle 5 can move around the entire circle without dead angles within a certain range, thereby imitating the manual welding swing technique.

[0027] Combination Figure 3 and Figure 4As shown, the quick-change head 4 includes a matching fixed body 402 and a rotating body 401. The rotating body 401 is a hollow structure with an opening at the lower end. The fixed body 402 is sleeved in the rotating body 401, and the lower end of the fixed body 402 extends out of the rotating body 401. The welding needle 5 is installed at the lower end of the fixed body 402, and the tip of the welding needle 5 extends out for welding discharge. When the rotating body 401 is connected to the transition body 3, the stopper 4013 on the rotating body 401 presses on the shoulder 4021 on the fixed body 402, thereby pressing the upper end surface of the fixed body 402 against the lower end surface of the transition body 3.

[0028] Two symmetrical slideways 301 are provided on the circumferential surface at the lower end of the transition body 3, a slideway opening 302 is provided at one end of the slideway 301, a positioning pit 303 is provided at the other end of the slideway 301, and a step 304 is provided at the position where the end of the transition body 3 is connected to the slideway opening 302. A step 304 is provided at the position where the end of the transition body 3 is connected to the slideway opening 302, and the slider 4011 can smoothly enter the slideway opening 302 by using the slideway opening 302 and the step 304. A positioning bead 4012 is installed on the inner side of the slider 4011, and when the slider 4011 rotates along the slideway 301 to the stroke focus, the positioning bead 4012 cooperates and fits into the positioning pit 303 to achieve the connection between the rotating body 401 and the transition body 3. The lower edge 305 of the slideway 301 is arranged axially tilted relative to the transition body 3 , so that when the rotating body 401 rotates, the fixed body 402 is gradually pressed against the transition body 3 , so that the fixed body 402 and the transition body 3 are closely connected.

[0029] In addition, the upper end of the fixed body 402 has two positioning protrusions 4022 that cooperate with the steps 304. The positioning protrusions 4022 cooperate with the steps 304 to limit the fixed body 402, ensuring that the fixed body 402 and the transition body 3 have an accurate alignment angle.

[0030] In this embodiment, the transition body 3 is installed with a first split cable, a first split coolant pipe, and a first split protective gas pipe. The fixed body 402 is installed with a second split cable, a second split coolant pipe, and a second split protective gas pipe. When the fixed body 402 is docked with the transition body 3, the first split cable is docked with the second split cable, the first split coolant pipe is docked with the second split coolant pipe, and the first split protective gas pipe is docked with the second split protective gas pipe. In this way, the transition body 3 can conduct the current to the quick-change head 4, the coolant is input into the quick-change head 4, and the protective gas is delivered to the quick-change head 4, so as to realize the electrification, cooling and gas protection of the welding needle 5.

[0031] Combination Figure 1As shown, a connector 6 is fixed to one side of the flange seat 1, and a multi-degree-of-freedom wire feeding mechanism 7 cooperating with the welding needle 5 is installed on the connector 6. The wire feeding mechanism 7 can be linked with the swinging action of the welding needle 5 to move and feed the wire within a certain range to ensure that the wire is fed throughout the whole process. One or more other accessories with different functions can also be installed through the connector 6.

[0032] Working principle:

[0033] The quick-change head 4 is aligned and installed into the transition body 3 from bottom to top, wherein the positioning protrusion 4022 on the fixed body 402 is aligned with the step 304 of the transition body 3, and the slider 4011 at the upper end of the rotating body 401 enters the slideway 301 from the slideway opening 302 of the transition body 3;

[0034] Rotate the rotating body 401 clockwise until it reaches the rightmost end of the slideway 301, and the positioning bead 4012 will bounce into the positioning pit 303. The positioning bead 4012 will ensure that the quick-change head 4 will not get loose;

[0035] Since the slideway 301 is a spiral ascending structure, the slider 4011 will continue to spirally ascend along the lower edge 305 of the slideway during the rotation process. The bottom of the rotating body 401 will press against the part of the fixed body 402 inside the rotating body 401, which will drive the fixed body 402 to be pressed against the lower end of the transition body 3; the pressing of the two parts will keep each docking interface in a pressed and sealed state;

[0036] In use, the welding gun uses a six-axis mechanism to imitate the manual swinging technique, and cooperates with the motion actuator and wire feeding mechanism to realize swing root welding in a fully automatic manner, which can achieve efficient, stable and reliable root welding effects.

[0037] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A swinging integrated welding gun, characterized in that: It comprises a six-axis mechanism (2), a transition body (3) being fixed to one end of the six-axis mechanism (2); the transition body (3) being connected to a quick-change head (4), and a welding pin (5) being fixed to the quick-change head (4); The quick-change head (4) comprises a fixed body (402) butted against the end of the transition body (3), and a rotating body (401) used to press the fixed body (402) onto the transition body (3); the welding needle (5) is fixed on the fixed body (402), and the rotating body (401) is detachably connected to the transition body (3); The six-axis mechanism (2) comprises six telescopic electric cylinders, and the six telescopic electric cylinders are respectively hinged between the flange seat (1) and the transition body (3).

2. The swing-integrated welding gun according to claim 1, characterized in that: A symmetrical slideway (301) is provided on the circumferential surface of the transition body (3) close to one end of the rotating body (401); a slideway opening (302) is provided at one end of the slideway (301); and a positioning pit (303) is provided at the other end of the slideway (301); A sliding block (4011) symmetrically matched with the slideway (301) is fixed to one end of the rotating body (401) close to the transition body (3), and a positioning bead (4012) matched with the positioning pit (303) is installed on the inner side of the sliding block (4011).

3. The swing-integrated welding gun according to claim 2, characterized in that: A step (304) is provided at the position where the end of the transition body (3) is connected to the slideway opening (302); the upper end of the fixed body (402) has two positioning protrusions (4022) that cooperate with the step (304); The lower edge (305) of the slideway (301) on the side close to the rotating body (401) is arranged obliquely.

4. The swing-integrated welding gun according to claim 1, characterized in that: The rotating body (401) is a hollow structure, and the fixed body (402) is sleeved in the rotating body (401); one end of the fixed body (402) away from the transition body (3) extends out of the rotating body (401), and the stopper (4013) on the rotating body (401) presses on the shoulder (4021) on the fixed body (402).

5. The swing-integrated welding gun according to claim 1, characterized in that: The transition body (3) is installed with a first split cable, a first split cooling liquid pipe and a first split protective air pipe; the fixed body (402) is installed with a second split cable, a second split cooling liquid pipe and a second split protective air pipe; When the fixed body (402) is docked with the transition body (3), the first split cable is docked with the second split cable, the first split cooling liquid pipe is docked with the second split cooling liquid pipe, and the first split protective air pipe is docked with the second split protective air pipe.

6. The swing-integrated welding gun according to claim 1, characterized in that: A flange seat (1) is fixed to one end of the six-axis mechanism (2) away from the transition body (3); a connecting piece (6) is fixed to one side of the flange seat (1), and a wire feeding mechanism (7) that cooperates with the welding needle (5) is installed on the connecting piece (6).

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