Drawing arc welding gun

Abstract

The pull arc welding gun comprises a shell part, a first driving part and a control module, the shell part is provided with a mounting cavity, a first hole and a second hole, the first hole and the second hole both communicate with the mounting cavity, a ground wire rod and a live wire rod are arranged in the first hole and the second hole in a penetrating mode correspondingly, and the ground wire rod and the live wire rod are both arranged in the front-back direction; the two ends of the live wire rod are arranged outside and the installation cavity respectively, the first driving piece is arranged in the installation cavity and provided with a connecting rod, one end of the connecting rod is connected with the end, located in the installation cavity, of the live wire rod, and the first driving piece can drive the connecting rod to move forwards or backwards so as to drive the live wire rod to move forwards or backwards correspondingly. The control module is electrically connected with the first driving piece, the control module is provided with a switch piece, the control module can control the first driving piece to drive the connecting rod to move backwards to the other end of the connecting rod to abut against the switch piece, and then the control module controls the first driving piece to drive the live wire rod to move forwards by a preset amount to the initial position.

Description

Technical Field

[0001] The invention relates to the technical field of welding tools, in particular to a drawn arc welding gun. Background Art

[0002] A drawn arc welding gun is a tool connected to a welding machine that can weld components to a workpiece by energizing and striking an arc.

[0003] In the existing technology, some arc welding guns are widely used in the repair of automobile dented sheet metal. Specifically, the arc welding gun connected to the welding machine can weld the part to be pulled (such as OT gaskets, studs, etc.) to the depressed part of the sheet metal, so that the tensile device can pull the above-mentioned part to be pulled to drive the depressed part of the sheet metal to recover. Among them, the process of the arc welding gun connected to the welding machine welding the part to be pulled to the sheet metal is as follows: 1. Drive the part to be pulled on the live wire rod and the ground wire rod to abut against the sheet metal; 2. Turn on the power and drive the part to be pulled on the live wire rod to gently retract away from the sheet metal (the current draws out an arc to melt the end of the part to be pulled and the surface of the sheet metal to form a molten pool); 3. Drive the part to be pulled on the live wire rod to extend to abut against the sheet metal (i.e., the molten pool), and weld the part to be pulled to the sheet metal. However, the inventors have found in many uses that the live wire rod connected to the arc welding gun and driving the workpiece to be drawn to retract or extend is not in the initial position after the welding work is completed, which will affect the next use of the arc welding gun. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an arc welding gun.

[0005] A drawn arc welding gun according to an embodiment of the present invention comprises a shell member, a first driving member and a control module, the shell member is provided with an installation cavity, and a first hole and a second hole both connected to the installation cavity, a ground rod and a live rod are respectively penetrated by the first hole and the second hole, the ground rod and the live rod are both arranged in the front-to-back direction, and both ends thereof are respectively arranged at the outside and the installation cavity, the first driving member is arranged in the installation cavity, the first driving member is provided with a connecting rod, one end of the connecting rod is connected to one end of the live rod located in the installation cavity, the first driving member can drive the connecting rod to move forward or backward so as to drive the live rod to move forward or backward accordingly, the control module is arranged in the installation cavity, the control module is electrically connected to the first driving member, and the control module is provided with a switch member, wherein the control module can control the first driving member to drive the connecting rod to move backward until the other end thereof abuts against the switch member, so that the control module controls the first driving member to drive the live rod to move forward a preset amount to an initial position.

[0006] A drawn arc welding gun according to an embodiment of the present invention has at least the following beneficial effects:

[0007] In the process of welding the workpiece to be drawn (such as OT gaskets, studs, etc.) to the sheet metal by the arc welding gun connected to the welding machine, the voltage value and other parameters required by factors such as the thickness of the sheet metal are different, so the amount of the arc drawn to melt the end of the workpiece to be drawn is different. Therefore, the position of the live wire rod when it is extended to abut the workpiece to be drawn against the sheet metal (i.e., the molten pool) is different. In other words, the live wire rod is not in the initial position after the welding work of the workpiece to be drawn is completed, which will affect the next use of the arc welding gun and the reliability and safety of the next welding process. In this regard, the arc welding gun of the present application is designed with a control module of a switch component, which can reset the live wire rod after the welding of the workpiece to be drawn is completed. The specific process is: 1. The control module controls the first driving component to drive the connecting rod to move backward to its other end to abut against the switch component; 2. The switch component generates a signal and controls the first driving component through the control module to drive the live wire rod to move forward a preset amount, so that the live wire rod returns to the initial position.

[0008] According to some embodiments of the present invention, the control module is provided with an indicator light, the shell member is provided with a third hole, and the indicator light is passed through the third hole to be exposed to the outside.

[0009] According to some embodiments of the present invention, the shell member is provided with a fourth hole, and a sleeve is rotatably passed through the fourth hole, and a sleeve cavity of the sleeve is connected to the outside and the installation cavity to enable wiring and pipe passing.

[0010] According to some embodiments of the present invention, the ground rod can be slidably inserted into the first hole, the shell member is provided with a slide groove located in the installation cavity, the part of the ground rod located in the installation cavity is sleeved with a slider and a first elastic member, the slider can slide with the ground rod, the slider is slidably arranged in the slide groove, one end of the first elastic member abuts against the shell member, and the other end abuts against the slider.

[0011] According to some embodiments of the present invention, the slider is provided with a fifth hole and a sixth hole which are connected, the slider is sleeved on the ground pole through the fifth hole, and the sixth hole is used for passing the connecting wire so that it can be electrically connected to the ground pole.

[0012] According to some embodiments of the present invention, the installation cavity is provided with a locking assembly, and the locking assembly is capable of locking the ground rod to limit the sliding of the ground rod.

[0013] According to some embodiments of the present invention, a portion of the grounding rod located in the installation cavity is provided with a tooth portion, and the locking assembly includes a swinging member and a second driving member, the swinging member is rotatably connected to the installation cavity, the swinging member is provided with a notch, the grounding rod is passed through the notch, the second driving member is arranged in the installation cavity, and the output end of the second driving member is connected to the swinging member, and the second driving member can drive the swinging member to rotate to an avoidance state or a locking state, wherein when the swinging member is in the avoidance state, the grounding rod can slide in the notch, and when the swinging member is in the locking state, the swinging member is engaged with the tooth portion to limit the sliding of the grounding rod.

[0014] According to some embodiments of the present invention, the front end portion of the live wire rod is provided with a seventh hole arranged along the length direction thereof, and the seventh hole is used for detachably inserting the connecting column of the to-be-pulled component group.

[0015] According to some embodiments of the present invention, at least two clips are provided at the front end portion of the live wire rod, at least two of the clips are arranged around the axis of the seventh hole to jointly surround a penetration space, and at least two of the clips are threadedly sleeved with locking pieces, wherein when the connecting column of the group of parts to be pulled out is sequentially inserted into the penetration space and the seventh hole, rotating the locking piece can enable at least two of the clips to jointly clamp the connecting column of the group of parts to be pulled out.

[0016] According to some embodiments of the present invention, the live wire rod is provided with a gas channel connected to the seventh hole, and a connecting pipe located in the installation cavity and connected to the gas channel; the connecting pipe can be connected to a pipeline for conveying protective gas so that the inner cavity of the pipeline, the inner cavity of the connecting pipe, the gas channel and the seventh hole are connected in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram showing that the drawn arc welding gun of the present invention can be selectively equipped with one of two sets of parts to be drawn;

[0019] Figure 2 for Figure 1 A partial exploded view of the drawn arc welding gun shown in FIG. 1 with some components removed;

[0020] Figure 3 for Figure 1 The structure diagram of the arc welding gun with the group of parts to be drawn containing OT gaskets after some parts are removed;

[0021] Figure 4 for Figure 1Another structural diagram of the arc welding gun with the group of parts to be drawn containing OT gaskets after some parts are removed;

[0022] Figure 5 for Figure 1 A cross-sectional view of the drawn arc welding gun shown in FIG. 1 with some components removed;

[0023] Figure 6 for Figure 1 A cross-sectional view of a drawn arc welding gun with a group of parts to be drawn including studs after some parts are removed;

[0024] Figure 7 for Figure 1 A cross-sectional view of an arc welding gun with a group of parts to be drawn containing OT gaskets after some parts are removed.

[0025] Reference numerals:

[0026] Housing 100, first hole 110, second hole 120, third hole 130, slide groove 140;

[0027] A first driving member 200 and a connecting rod 210;

[0028] Control module 300, switch element 310, indicator light 320;

[0029] Ground rod 400, tooth portion 410;

[0030] The live wire rod 500, the seventh hole 510, the clip 520, the gas channel 530, and the pipe connection 540;

[0031] The sleeve 610, the slider 620, the fifth hole 621, the sixth hole 622, the first elastic member 630, the locking member 640, and the second elastic member 650;

[0032] Locking assembly 700, swinging member 710, notch 711, second driving member 720;

[0033] A group of parts to be pulled out 800 , a mounting seat 810 , a connecting column 811 , and a part to be pulled out 820 . DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0035] In the description of the present invention, if there is a description of first, second, third, fourth, fifth, etc., it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0038] Reference Figures 1 to 7 An embodiment of the present invention provides an arc welding gun, which is used to be connected to an external welding machine, and includes a housing 100, a first driving member 200 and a control module 300.

[0039] The housing 100 is provided with an installation cavity, and a first hole 110 and a second hole 120 both connected to the installation cavity, the first hole 110 and the second hole 120 are respectively penetrated with a ground rod 400 and a live rod 500, the ground rod 400 and the live rod 500 are both arranged in the front-to-back direction, and both ends thereof are respectively arranged at the outside and the installation cavity, the first driving member 200 is arranged in the installation cavity, the first driving member 200 is a motor assembly, the first driving member 200 is provided with a connecting rod 210, the connecting rod 210 is a screw member, one end of the connecting rod 210 and the live rod 500 are located at the installation cavity One end is connected, the first driving member 200 can drive the connecting rod 210 to move forward or backward, so as to drive the live wire rod 500 to move forward or backward accordingly, the control module 300 is arranged in the installation cavity, the control module 300 is electrically connected to the first driving member 200, and the control module 300 is provided with a switch member 310, wherein the control module 300 controls the first driving member 200 to drive the connecting rod 210 to move backward until the other end thereof abuts against the switch member 310, and then the control module 300 controls the first driving member 200 to drive the live wire rod 500 to move forward a preset amount to an initial position.

[0040] It can be understood that the live wire rod 500 moves forward or backward, that is, the live wire rod 500 extends or retracts accordingly; the switch element 310 can be set as a micro switch or the like.

[0041] It can be understood that the first driving member 200 can drive the connecting rod 210 which is a screw member to rotate, so as to drive the live wire rod 500 to move forward or backward.

[0042] It is understandable that the first driving member 200 is a motor assembly, which is a servo motor, which can flexibly drive the live wire rod 500 to freely extend and retract according to actual needs, so as to correspondingly drive the live wire rod 500 to extend a corresponding distance. Of course, it should be noted that the first driving member 200 can also be set as a cylinder member, an electric push rod, etc.

[0043] In the process of welding the workpiece 820 to be drawn (such as OT gaskets, studs, etc.) to the sheet metal by the arc welding gun connected to the welding machine, the parameters such as the voltage value required for different sheet metal thickness and other factors are different, so the amount of the arc melted by the end of the workpiece 820 to be drawn is different. Therefore, the position of the live wire rod 500 when it is extended to abut the workpiece 820 to be drawn against the sheet metal (i.e., the molten pool) is different. In other words, the live wire rod 500 is not in the initial position after the welding work of the workpiece 820 to be drawn is completed, which will affect the next use of the arc welding gun and the reliability and safety of the next welding process. In this regard, the arc welding gun of the present application is designed with a control module 300 of a switch component, and the control module 300 can reset the live wire rod 500 after the welding of the to-be-drawn component 820 is completed. The specific process is: 1. The control module 300 controls the first driving component 200 to drive the connecting rod 210 to move backward until its other end abuts against the switch component 310; 2. The switch component 310 generates a signal and controls the first driving component 200 through the control module 300 to drive the live wire rod 500 to move forward a preset amount, so that the live wire rod 500 returns to its initial position.

[0044] In this embodiment, refer to Figure 2 The control module 300 is provided with an indicator light 320, the housing 100 is provided with a third hole 130, and the indicator light 320 is passed through the third hole 130 to be exposed to the outside. There are three indicator lights 320.

[0045] Through the above structure, the user can observe whether the corresponding indicator light 320 is on to determine the state of the arc welding gun.

[0046] It is understandable that the content corresponding to the indicator light 320 can be set according to actual conditions.

[0047] In some embodiments, the indicator lights 320 can be set to four, five, etc. according to the number of states of the drawn arc welding gun.

[0048] In this embodiment, refer to Figure 1 and Figure 2 The shell 100 is provided with a fourth hole, and a sleeve 610 is rotatably passed through the fourth hole. The sleeve cavity of the sleeve 610 communicates with the outside and the installation cavity to enable wiring and pipe passing.

[0049] It is understandable that, referring to Figure 2 A joint portion is provided at one end of the sleeve 610 , and the sleeve 610 is rotatably inserted into the fourth hole through the joint portion, so that the drawn arc welding gun can rotate relative to the sleeve 610 .

[0050] Through the above structure, on the one hand, the barrel cavity of the barrel sleeve 610 is connected to the outside and the installation cavity to enable routing of wires and pipes, so that the barrel sleeve 610 can be used for routing and passing cables and air pipes, so as to facilitate the layout of cables and air pipes, and provide a certain protection for cables and air pipes, so that cables and air pipes are not easily damaged; on the other hand, the barrel sleeve 610 is rotatably inserted into the fourth hole through the joint portion, so that the arc welding gun can rotate relative to the barrel sleeve 610, so as to improve the flexibility of the user when operating the arc welding gun.

[0051] In this embodiment, refer to Figure 1 and Figure 3 , the first hole 110 and the ground rod 400 are both set to two, the two ground rods 400 are slidably arranged in the two first holes 110 in a one-to-one correspondence, the two ground rods 400 are arranged on both sides of the live rod 500, the shell 100 is provided with two slide grooves 140 located in the installation cavity, and the part of the ground rod 400 located in the installation cavity is sleeved with a slider 620 and a first elastic member 630, the slider 620 can slide with the corresponding ground rod 400, the first elastic member 630 is a spring, and the two sliders 620 are slidably arranged in the two slide grooves 140 in a one-to-one correspondence, one end of the first elastic member 630 abuts against the shell 100, and the other end abuts against the corresponding slider 620.

[0052] Through the above structure, on the one hand, the two ground rods 400 can both slide and be compressed and rebounded, which enables the two ground rods 400 to abut against the uneven sheet metal surface; on the other hand, the slider 620 is slidably arranged in the corresponding slide groove 140 to limit the sliding range of the corresponding ground rod 400 to prevent the ground rod 400 from sliding out too much or sliding back too much.

[0053] The part of the ground rod 400 located in the installation cavity is sleeved with a slider 620. For details, refer to Figure 3 and Figure 5 The slider 620 is provided with a fifth hole 621 and a sixth hole 622 which are connected. The slider 620 is sleeved on the grounding rod 400 through the fifth hole 621. The sixth hole 622 is used for passing the connecting wire so that the connecting wire can be electrically connected to the grounding rod 400.

[0054] With the above structure, the slider 620 can be mounted on the grounding rod 400 through the fifth hole 621, and the connecting wire can be passed through the sixth hole 622 to electrically connect to the grounding rod 400. It can be seen that the slider 620 has the effects of sliding limit and providing installation of connecting wires.

[0055] In this embodiment, refer to Figure 4 and Figure 5 The installation cavity is provided with a locking assembly 700, which can lock the ground rod 400 to limit its sliding.

[0056] Through the above structure, when the two grounding rods 400 are in contact with the sheet metal for welding, the locking assembly 700 can lock the two grounding rods 400 to limit their sliding, so as to prevent the grounding rods 400 from detaching from the sheet metal and releasing the contact with the sheet metal when the part 820 to be pulled out is being arc welded, thereby ensuring the smooth progress of the arc welding work.

[0057] Specifically, the ground rod 400 is provided with a tooth portion 410 at the portion of the installation cavity, and the locking assembly 700 includes a swing member 710 and a second driving member 720, and the second driving member 720 is configured as a cylinder member. Figure 5 The swing member 710 is rotatably connected to the installation cavity. The swing member 710 is provided with two notches 711. Two grounding rods 400 are respectively provided in the two notches 711. The second driving member 720 is provided in the installation cavity. The output end of the second driving member 720 is connected to the swing member 710. The second driving member 720 can drive the swing member 710 to swing backward or forward so that the swing member 710 is in a corresponding avoidance state or locking state. When the swing member 710 is in the avoidance state, the axis of the notch 711 is parallel or nearly parallel to the axis of the grounding rod 400. Therefore, the grounding rod 400 can slide in the corresponding notch 711; when the swing member 710 is in the locking state, the axis of the notch 711 is inclined relative to the axis of the grounding rod 400, and the swing member 710 is clamped into a corresponding tooth groove in the tooth portion 410 (that is, the swing member 710 is clamped with the tooth portion 410) to limit the sliding movement of the grounding rod 400.

[0058] It is understandable that the second driving member 720 may also be configured as an electric push rod or other components.

[0059] It is understandable that the tooth portion 410 has a plurality of annular tooth grooves arranged at intervals along the axis of the grounding rod 400. Therefore, when the swinging member 710 is inserted into a corresponding tooth groove in the tooth portion 410, the grounding rod 400 can be locked in the corresponding position.

[0060] In order to facilitate the swing member 710 to return to the avoidance state, refer to Figure 4A second elastic member 650 is provided between the swing member 710 and the housing member 100 , and the second elastic member 650 is configured as a spring.

[0061] The front end of the live wire rod 500 located outside is used to connect with the mounting seat 810. For details, refer to Figure 6 The front end of the live wire rod 500 is provided with a seventh hole 510 arranged along the length direction thereof, and the seventh hole 510 is used for detachably inserting the connecting column 811 of the to-be-pulled component group 800.

[0062] It can be understood that the to-be-pulled component set 800 includes a mounting seat 810 and a to-be-pulled component 820 (stud or OT gasket) detachably mounted on the mounting seat 810, and the front end portion of the live wire rod 500 located outside is used to connect with the mounting seat 810. Among them, since the to-be-pulled component 820 is detachably mounted on the mounting seat 810, when the to-be-pulled component 820 is welded to the sheet metal, the mounting seat 810 is driven to move relative to the to-be-pulled component 820, so that the to-be-pulled component 820 can be separated from the mounting seat 810.

[0063] Through the above structure, refer to Figure 1 According to actual use requirements, the user can insert the connecting column 811 of the mounting seat 810 with the corresponding part 820 to be pulled into the seventh hole 510 to perform welding work on the corresponding part 820 to be pulled.

[0064] In order to improve the connection stability when the connecting column 811 of the puller assembly 800 is inserted into the seventh hole 510, refer to Figure 1 , Figure 2 as well as Figure 6 The front end of the live wire rod 500 is provided with four clips 520, and the four clips 520 are arranged around the axis of the seventh hole 510 to jointly surround a penetration space. The four clips 520 are threadedly sleeved with locking pieces 640, wherein, when the connecting column 811 of the to-be-pulled component group 800 is sequentially inserted into the penetration space and the seventh hole 510, rotating the locking piece 640 can enable the four clips 520 to jointly clamp the connecting column 811 of the to-be-pulled component group 800.

[0065] It is understandable that rotating the locking member 640 can also release the four clips 520 from clamping the connecting column 811 of the to-be-pulled member group 800, so that the connecting column 811 of the to-be-pulled member group 800 can be pulled out from the penetration space and the seventh hole 510.

[0066] In this embodiment, refer to Figure 3 , Figure 6 as well as Figure 7The live wire rod 500 is provided with a gas channel 530 connected to the seventh hole 510, and a connecting pipe 540 located in the installation cavity and connected to the gas channel 530. The connecting pipe 540 can be connected to a pipeline for conveying protective gas so that the inner cavity of the pipeline, the inner cavity of the connecting pipe 540, the gas channel 530 and the seventh hole 510 are connected in sequence.

[0067] Through the above structure, the welding machine can transport the shielding gas through the pipeline, so that the shielding gas flows through the inner cavity of the connecting piece 540, the gas channel 530, the seventh hole 510 and the gas outlet channel in sequence and then is sent out, so as to remove harmful gases such as oxygen and water vapor around the molten pool and prevent the occurrence of welding defects such as oxidation, pollution and porosity.

[0068] It is understandable that when the to-be-pulled member 820 on the to-be-pulled member group 800 is a stud, Figure 1 and Figure 6 The mounting seat 810 includes a protective cover (the material of the protective cover is an insulating material such as plastic) and a connecting column 811 connected to the front and rear. The mounting seat 810 is provided with an air outlet channel, a part of which is located in the protective cover, and the other part is located in the connecting column 811. The part to be pulled out 820, which is a stud, can be detachably installed in the air outlet channel part located in the protective cover and is surrounded and protected by the protective cover. It can be seen from this that, on the one hand, when the connecting column 811 of the group of parts to be pulled out 800 is inserted into the seventh hole 510, the gas outlet channel is connected to the seventh hole 510, and the welding machine can transport the protective gas through the pipeline, so that the protective gas flows through the inner cavity of the connecting piece 540, the gas channel 530, the seventh hole 510 and the gas outlet channel in sequence and is then sent out, wherein the part to be pulled out 820, which is a stud, is surrounded by a protective cover, and the protective gas can annularly surround the welding surface (circular) of the stud to ensure high-quality welding of the part to be pulled out 820, which is a stud; on the other hand, the part to be pulled out 820, which is a stud, is surrounded and protected by the protective cover, and the protective cover isolates the part to be pulled out 820, which is a stud, and therefore, the probability of the part to be pulled out 820 accidentally touching the grounding rod 400 and igniting during the process of replacing or separating the part to be pulled out from the mounting seat 810 can be reduced.

[0069] It is understandable that when the to-be-drawn piece 820 on the to-be-drawn piece set 800 is an OT gasket, Figure 1 and Figure 7The mounting seat 810 includes a mounting box and a connecting column 811 which are connected to each other at the front and rear. The mounting seat 810 is provided with an air outlet channel, a part of which is located in the mounting box, and the other part is located in the connecting column 811. The part to be pulled 820, which is an OT gasket, can be detachably mounted on the air outlet channel part located in the mounting box (specifically, the mounting box is provided with a spring located in the air outlet channel, and the part to be pulled 820, which is an OT gasket, is penetrated in the air outlet channel part of the mounting box and is fixed by the spring). It can be seen from this that, on the one hand, when the connecting column 811 of the part group 800 to be pulled is inserted into the seventh hole 510, the air outlet channel is connected to the seventh hole 510, and the welding machine can transport the shielding gas through the pipeline, so that the shielding gas flows through the inner cavity of the connecting pipe 540, the gas channel 530, the seventh hole 510 and the air outlet channel in sequence and then is sent out, so as to improve the welding quality of the part to be pulled 820, which is an OT gasket. Among them, the welding surface of the part to be pulled out 820, which is an OT gasket, is strip-shaped, so it does not need to be surrounded by protective gas as required during the above-mentioned stud welding; on the other hand, since the welding end of the part to be pulled out 820, which is an OT gasket, extends out of the installation box for a long distance, the probability of accidentally touching the grounding rod 400 and igniting it during the process of replacement or separation from the mounting seat 810 is low, so there is no need to install a protective cover for protection.

[0070] In summary, when the to-be-drawn part 820 is an OT gasket, the process of using the arc welding gun of the present application connected to the welding machine to weld the OT gasket to the sheet metal and driving the live wire rod 500 to reset is as follows:

[0071] 1. The OT gasket is detachably inserted into the mounting box portion of the mounting seat 810. The mounting seat 810 is inserted into the seventh hole 510 through the connecting column 811. The locking member 640 is rotated so that the four clips 520 clamp the connecting column 811 together (i.e., the OT gasket is installed on the live wire rod 500).

[0072] 2. Drive the ground wire rod 400 of the arc welding gun and the OT gasket installed on the live wire rod 500 to abut against the sheet metal, wherein the ground wire rod 400 can slide and adapt accordingly according to the concave and convex conditions of the sheet metal;

[0073] 3. The second driving member 720 drives the swinging member 710 to swing forward, and the swinging member 710 is in a locked state. When the swinging member 710 is inserted into a corresponding tooth groove in the tooth portion 410, the grounding rod 400 is locked to restrict its sliding;

[0074] 4. The welding machine energizes the ground rod 400 and the live rod 500, and the first driving member 200 drives the connecting rod 210 to move backward to drive the OT gasket on the live rod 500 to move backward a first distance. At this time, the current draws out an arc to melt the contact part between the OT gasket and the sheet metal to form a molten pool;

[0075] 5. The first driving member 200 drives the connecting rod 210 to move forward to drive the OT gasket on the live wire rod 500 to extend to abut against the sheet metal (i.e., the molten pool), completing the welding and fixing of the OT gasket;

[0076] 6. The OT gasket can be separated from the mounting seat 810 on the drawn arc welding gun by driving the drawn arc welding gun to move as a whole or by driving the live wire rod 500 to move relative to the OT gasket through the first driving member 200;

[0077] 7. The control module 300 controls the first driving member 200 to drive the connecting rod 210 to move backward to the other end (rear end) thereof to abut against the switch member 310, wherein the backward movement distance is a second distance, and the value of the second distance is greater than the value of the first distance;

[0078] 8. The switch 310 generates a signal and controls the first driving member 200 through the control module 300 to drive the connecting rod 210 to move forward to drive the live wire rod 500 to move forward a preset amount, so that the live wire rod 500 returns to the initial position.

[0079] It should be noted that when the part to be pulled out 820 is a stud, the process of using the arc welding gun of the present application connected to the welding machine to weld the stud to the sheet metal and drive the live wire rod 500 to reset is the same as the process when the part to be pulled out 820 is a stud, so it will not be repeated here.

[0080] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A drawn arc welding gun, characterized in that: include A housing (100) is provided with an installation cavity, and a first hole (110) and a second hole (120) both communicated with the installation cavity, wherein a grounding rod (400) and a live rod (500) are respectively passed through the first hole (110) and the second hole (120), and the grounding rod (400) and the live rod (500) are both arranged in a front-to-back direction, and both ends thereof are respectively arranged at the outside and the installation cavity; A first driving member (200) is disposed in the installation cavity. The first driving member (200) is provided with a connecting rod (210). One end of the connecting rod (210) is connected to one end of the live wire rod (500) located in the installation cavity. The first driving member (200) can drive the connecting rod (210) to move forward or backward, so as to drive the live wire rod (500) to move forward or backward accordingly. A control module (300) is arranged in the installation cavity, the control module (300) is electrically connected to the first driving member (200), and the control module (300) is provided with a switch member (310), wherein: The control module (300) is capable of controlling the first driving member (200) to drive the connecting rod (210) to move backward until the other end thereof abuts against the switch member (310), so that the control module (300) can then control the first driving member (200) to drive the live wire rod (500) to move forward a preset amount to an initial position.

2. A drawn arc welding gun according to claim 1, characterized in that: The control module (300) is provided with an indicator light (320), the housing (100) is provided with a third hole (130), and the indicator light (320) is passed through the third hole (130) to be exposed to the outside.

3. A drawn arc welding gun according to claim 1, characterized in that: The housing (100) is provided with a fourth hole, and a sleeve (610) is rotatably passed through the fourth hole. The sleeve cavity of the sleeve (610) communicates with the outside and the installation cavity so that wires and pipes can be routed and passed through.

4. A drawn arc welding gun according to claim 1, characterized in that: The grounding rod (400) can be slidably inserted into the first hole (110); the housing (100) is provided with a slide groove (140) located in the installation cavity; the portion of the grounding rod (400) located in the installation cavity is sleeved with a slider (620) and a first elastic member (630); the slider (620) can slide with the grounding rod (400); the slider (620) is slidably arranged in the slide groove (140); one end of the first elastic member (630) abuts against the housing (100), and the other end abuts against the slider (620).

5. A drawn arc welding gun according to claim 4, characterized in that: The slider (620) is provided with a fifth hole (621) and a sixth hole (622) which are connected to each other. The slider (620) is sleeved on the grounding rod (400) through the fifth hole (621), and the sixth hole (622) is used for passing a connecting wire so as to enable the connecting wire to be electrically connected to the grounding rod (400).

6. A drawn arc welding gun according to claim 4, characterized in that: The installation cavity is provided with a locking assembly (700), and the locking assembly (700) is capable of locking the grounding rod (400) to limit its sliding.

7. A drawn arc welding gun according to claim 6, characterized in that: The part of the grounding rod (400) located in the installation cavity is provided with a tooth portion (410), and the locking assembly (700) comprises: A swinging member (710) is rotatably connected to the installation cavity, the swinging member (710) is provided with a notch (711), and the grounding rod (400) is inserted into the notch (711); The second driving member (720) is arranged in the installation cavity, the output end of the second driving member (720) is connected to the swing member (710), and the second driving member (720) can drive the swing member (710) to rotate to an avoidance state or a locking state, wherein: When the swing member (710) is in the avoidance state, the ground wire rod (400) can slide in the notch (711). When the swing member (710) is in a locked state, the swing member (710) is engaged with the tooth portion (410) to limit the sliding of the grounding rod (400).

8. The drawn arc welding gun according to claim 1, characterized in that: The front end of the live wire rod (500) is provided with a seventh hole (510) arranged along its length direction, and the seventh hole (510) is used for detachably inserting a connecting column (811) of the to-be-pulled component group (800).

9. A drawn arc welding gun according to claim 8, characterized in that: The front end of the live wire rod (500) is provided with at least two clips (520), at least two of the clips (520) are arranged around the axis of the seventh hole (510) to jointly surround a penetration space, at least two of the clips (520) are threadedly sleeved with locking members (640), wherein: When the connecting column (811) of the to-be-pulled component group (800) is inserted into the penetration space and the seventh hole (510) in sequence, rotating the locking member (640) enables at least two of the clamping pieces (520) to jointly clamp the connecting column (811) of the to-be-pulled component group (800).

10. The drawn arc welding gun according to claim 8, characterized in that: The live wire rod (500) is provided with a gas channel (530) connected to the seventh hole (510), and a connecting pipe (540) located in the installation cavity and connected to the gas channel (530); the connecting pipe (540) can be connected to a pipeline for conveying protective gas, so that the inner cavity of the pipeline, the inner cavity of the connecting pipe (540), the gas channel (530) and the seventh hole (510) are connected in sequence.

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