Gas saving device for welding shielding gas

Abstract

The invention discloses a gas saving device for welding shielding gas, and relates to the technical field of shielding gas saving, the gas saving device comprises gas saving equipment, a fluid pipeline and a control part are arranged in the gas saving equipment, the control part drives a baffle in the fluid pipeline to move through obtained seam width data so as to obtain the maximum flow of welding the seam width; according to the method, the maximum fluid flow during welding of the seam width is determined through the seam width, namely, targeted fluid flow adjustment can be conducted according to different welding seam widths, the purpose of preliminary gas saving is achieved, and meanwhile covering of protective gas can be guaranteed. And the rotating angle of the dynamic adjusting plate is adjusted according to the proportion, so that the flow is dynamically adjusted to further save gas. According to the real-time change of the welding current, the gas flow is intelligently controlled, and gas is supplied after being specially treated on the premise that the gas formula is not changed. And the gas consumption is effectively reduced while the welding quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of shielding gas saving technology, in particular to a welding shielding gas saving device. Background Art

[0002] During the welding process, the use of welding shielding gas can prevent the high-temperature molten pool from being oxidized and improve the welding quality. If the welding shielding gas flow rate is too small, it will not play a protective role; if the welding shielding gas flow rate is too large, it will affect the stability of the arc. Therefore, the size of the welding shielding gas flow rate should be adjusted frequently according to the working conditions. In the current field of welding robots, the welding shielding gas is output from the gas source, reaches the wire feeder through the air duct, and then reaches the welding robot through the cable, forming a complete set of structures. During the welding process, the size of the gas flow rate is adjusted by the worker manually adjusting the knob of the gas valve at the gas source. The automatic adjustment welding gas flow device of the present invention is to realize the automatic adjustment of the gas flow rate. During the welding process, it is sometimes necessary to realize online automatic adjustment of the welding shielding gas flow rate according to the welding quality and welding conditions. Therefore, research on the device for automatically adjusting the welding shielding gas flow rate will help to realize welding automation, improve welding quality, and produce significant economic benefits.

[0003] In traditional gas shielded welding, the welding process is normally divided into 6 stages: front gas, arc starting, climbing, welding, arc ending, and gas extension. When there is no gas-saving device, the gas flow rate is fixed in these 6 stages. At the same time, when welding with different weld widths, the corresponding gas flow rate is not set according to the different weld widths. The operator uses the maximum gas flow rate during welding, resulting in waste of shielding gas. Summary of the Invention

[0004] The present invention aims to provide a gas-saving device for welding shielding gas. The device determines the maximum fluid flow rate for welding at a specific seam width based on the seam width. This allows for targeted fluid flow adjustments based on different seam widths, achieving a preliminary gas-saving effect while also ensuring shielding gas coverage. Proportional adjustment of the rotation angle of the dynamic adjustment plate allows for dynamic flow adjustment, further enhancing gas conservation. The gas flow rate is intelligently controlled based on real-time changes in the welding current, and the gas is supplied after special treatment without changing the gas formula. This ensures welding quality while effectively reducing gas consumption.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a gas saving device for welding shielding gas, comprising:

[0006] The wires leading out of the welding power supply are divided into two paths through the current sensor. One path is connected to the welding robot, and the other path is connected to the air-saving device. A welding circuit is formed between the welding power supply and the welding robot. The current sensor detects the current value of the welding circuit and transmits it to the air-saving device.

[0007] A detector for detecting the seam width of the workpiece to be welded and uploading the seam width data to the air-saving device;

[0008] The air-saving device has a fluid pipeline and a control unit inside. The control unit first drives the movement of the baffle in the fluid pipeline based on the obtained seam width data to obtain the maximum flow rate for welding the seam width. Then, the control unit changes the angle of the dynamic adjustment plate on the baffle based on the obtained welding current value to match the fluid flow in the fluid pipeline with the welding current. The flow rate in the fluid pipeline is further controlled according to the current value.

[0009] The inlet end of the fluid pipeline is connected to the outlet end of the gas source, and the outlet end of the fluid pipeline is connected to the welding robot through a pipeline.

[0010] As an optional implementation, the current sensor includes one or more of a current clamp, a current detector, and a multimeter.

[0011] As an optional embodiment, the detector includes one or more of a single-head parallel light width meter, a dual-head parallel light width meter, a wide-angle head width meter, a laser width meter, and a binocular vision width meter.

[0012] As an optional embodiment, the fluid pipeline is connected to the control component, the air flow channel arranged inside the control component is connected to the fluid pipeline, and the control component is provided with a power structure for driving the baffle to move and a speed change structure for driving the dynamic adjustment plate to move.

[0013] As an optional embodiment, the power structure includes a cylinder and a telescopic rod. The telescopic rod connected to the cylinder is connected to the baffle. A control part for accommodating the baffle is provided on the fluid pipeline. The cylinder is assembled on the control part. The cylinder adjusts the position of the baffle according to the width of the gap.

[0014] As an optional embodiment, a protrusion is provided on the top of the dynamic adjustment plate, a rotating shaft connected at both ends of the protrusion passes through the bracket, and the bracket is assembled on one side surface of the baffle.

[0015] As an optional embodiment, the speed change structure includes an adjustment plate 1, an adjustment plate 2, a micro cylinder, a cylinder rod and a positioning shaft, and the positioning shaft is hinged between the adjustment plate 1 and the adjustment plate 2;

[0016] The positioning shaft is hinged to the top end of the micro cylinder, and the cylinder rod on the micro cylinder is hinged to the movable slider on the dynamic adjustment plate.

[0017] As an optional embodiment, upper baffles and lower baffles that extend in a staggered manner are provided on the side surfaces of the baffle, and the upper baffles and lower baffles are staggered against the upper and lower surfaces of the dynamic adjustment plate.

[0018] As an optional implementation, the telescopic length of the micro cylinder is inversely proportional to the welding current, and the telescopic length of the cylinder is inversely proportional to the seam width.

[0019] The technical effects and advantages of the present invention are as follows:

[0020] 1. The maximum fluid flow rate during welding for the seam width is first determined by the seam width, that is, the fluid flow rate can be adjusted according to different weld widths, which serves the purpose of preliminary gas saving and also ensures the coverage of the protective gas.

[0021] 2. When welding wide and narrow seams at the same welding current, the cylinder rod extends to the same length, while the dynamic adjustment plate rotates at different angles. This allows the baffle height to be adjusted to suit the weld seam. The dynamic adjustment plate's rotation angle is adjusted proportionally. For wide seams, at the same welding current, the dynamic adjustment plate has a larger angle, while for narrow seams, at the same current, the dynamic adjustment plate has a smaller angle. This allows for dynamic flow adjustment and further reduces gas consumption. The gas flow rate is intelligently controlled based on real-time changes in welding current, and the gas is supplied after special processing without changing the gas formula. This ensures welding quality while effectively reducing gas consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The air-saving device of the present invention is connected to the robot and the air source structure diagram;

[0023] Figure 2 This is a connection diagram of the internal fluid pipelines, control components and control unit of the air-saving device of the present invention;

[0024] Figure 3 This is a left side structural diagram of the interior of the control unit of the present invention;

[0025] Figure 4 For the present invention Figure 3 A magnified view of point A;

[0026] Figure 5 This is a diagram showing the internal right side structure of the control unit of the present invention;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of point B;

[0028] Figure 7 A schematic diagram comparing the lifting positions of the wide slit and narrow slit baffles of the present invention;

[0029] Figure 8 This is a schematic diagram of the cylinder rod of the present invention moving on the dynamic adjustment plate to adjust the rotation angle of the dynamic adjustment plate.

[0030] In the picture:

[0031] 1. Welding power supply;

[0032] 2. Current sensor;

[0033] 3. Detector;

[0034] 4. Energy-saving equipment;

[0035] 41. Fluid pipeline; 42. Control element; 43. Baffle; 44. Dynamic adjustment plate; 441. Bump;

[0036] 5. Control Department;

[0037] 6. Bracket;

[0038] 71. Positioning shaft; 72. Adjustment plate 1; 73. Adjustment plate 2; 74. Micro cylinder; 75. Cylinder rod;

[0039] 8. Upper stop bar;

[0040] 9. Lower baffle. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] Before describing the embodiments of the present application, in order to facilitate understanding of the technical solutions of the present application, the basic concepts and terms involved in the embodiments of the present application are first explained:

[0043] The welding process is normally divided into six stages: pre-gas, arc starting, ramping, welding, arc ending, and gas extension. Without a gas-saving device, the gas flow rate is fixed during these six stages. However, in actual process, the gas flow requirements for pre-gas, ramping, arc ending, and gas extension can be reduced.

[0044] 1. Pre-gas stage: The main purpose is to establish a protective atmosphere before welding. At this stage, the arc has not yet been struck, and the gas flow rate can be appropriately reduced, but it must be ensured that a stable protective layer is established in advance;

[0045] 2. Arc starting stage: Arc starting refers to the action of starting to generate high-frequency arc in argon arc welding;

[0046] 3. Climbing stage: The welding current or energy gradually increases, and the gas flow may need to be adjusted dynamically;

[0047] 4. Welding stage: welding current reaches the maximum, and shielding gas flow reaches the maximum;

[0048] 5. Arc ending stage: At the end of welding, the welding current slowly decreases to zero and the molten pool gradually cools down, but the shielding gas still needs to be introduced for protection;

[0049] 6. Gas extension stage: Continue to introduce protective gas until the weld is completely cooled.

[0050] At the same time, the gas flow rate required for different weld widths is also different. The following table shows the gas flow rate corresponding to the weld width.

[0051] Weld width (mm) Typical melt pool length (mm) <![CDATA[Gas coverage required area (cm 2 )]]> 3 8-12 2.4-3.6 6 15-20 9.0-12.0 10 25-35 25-35

[0052] The following are specific instructions for different weld widths and gas-saving protection at different stages, which implement dynamic gas control for multiple weld widths and multiple stages, and dynamically adjust the gas flow to achieve the gas-saving function of the welding shielding gas.

[0053] See Figures 1-4 To achieve the above-mentioned purpose, the present invention provides the following technical solution: a gas saving device for welding shielding gas, comprising:

[0054] The wire leading out of the welding power supply 1 is divided into two paths through the current sensor 2. One path is connected to the welding robot, and the other path is connected to the air-saving device 4. The welding power supply 1 and the welding robot form a welding circuit. The current sensor 2 detects the current value of the welding circuit and transmits it to the air-saving device 4.

[0055] The air-saving device 4 is provided with a fluid pipeline 41 and a control member 42. The control member 42 first drives the baffle 43 in the fluid pipeline 41 to move according to the obtained seam width data to obtain the maximum flow rate for welding the seam width.

[0056] Detector 3, which is used to detect the seam width of the workpiece to be welded and upload the seam width data to the air-saving device 4;

[0057] Among them, as an optional way of saving gas for welding shielding gas, the detector 3 includes one or more of a single-head parallel light width meter, a dual-head parallel light width meter, a wide-angle head width meter, a laser width meter, and a binocular vision width meter.

[0058] Take the laser rangefinder as an example: a high-precision laser rangefinder sensor is used to project a laser beam onto the surface of the object to be welded, and the width of the plate is determined by receiving the reflected light and calculating the position change of the light spot.

[0059] Before welding ventilation, the weld width is measured by the detector 3, and the measured data is uploaded to the air-saving device 4. The position of the baffle 43 is changed according to the different weld widths, so that the maximum fluid flow rate that can pass through the fluid pipeline 41 is first determined under the measured weld width.

[0060] Through the above steps, the maximum fluid flow rate is determined, which ensures that the shielding gas can ensure complete coverage during the welding process.

[0061] As the droplet forms, grows, and transitions, the arc resistance of the welding arc also changes with the droplet's changes; naturally, on a microscopic time scale, the welding current also changes. The welding shielding gas has a real-time resistance heat power of P = 12R. As the arc heat changes, the amount of welding shielding gas that constitutes the arc does not need to be a constant value and can also vary accordingly.

[0062] Among them, as an optional mode of a gas saving device for welding shielding gas, the current sensor 2 includes one or more of a current clamp, a current detector, and a multimeter.

[0063] The current sensor 2 detects the welding current in the welding circuit using one or more of a current clamp, a current detector, and a multimeter. The obtained welding current value changes the angle of the dynamic adjustment plate 44 on the baffle 43, aligning the fluid flow in the fluid pipeline 41 with the welding current. The flow in the fluid pipeline 41 is further controlled based on the current.

[0064] The dynamic adjustment plate 44 optimizes the correspondence between welding current and shielding gas flow. The built-in database optimizes welding quality by stabilizing the voltage, collects welding current in real time, and dynamically adjusts the gas supply, effectively reducing gas consumption while ensuring the protection effect of the molten pool.

[0065] The inlet end of the fluid pipeline 41 is connected to the outlet end of the gas source, and the outlet end of the fluid pipeline 41 is connected to the welding robot through a pipeline.

[0066] The gas from the gas source flows into the welding robot through the fluid pipeline 41. In the pre-gas stage, climbing stage, arc closing stage and gas extension stage, the flow in the fluid pipeline 41 is further controlled by the size of the welding current, thereby realizing multi-stage dynamic gas regulation and dynamic adjustment of the gas flow.

[0067] Gas flow regulation is synchronized with welding current: During the welding process, the intelligent gas saver adjusts the total amount of shielding gas to the real-time demand and ensures that there is excess welding shielding gas.

[0068] The following is a detailed description of the structure of the maximum flow rate adjustment function according to the weld seam:

[0069] The fluid pipeline 41 is connected to the control component 42 . The air flow channel provided inside the control component 42 is communicated with the fluid pipeline 41 . The control component 42 is provided with a power structure for driving the baffle 43 to move.

[0070] The power structure includes a cylinder and a telescopic rod. The telescopic rod connected to the cylinder is connected to the baffle 43. A control part 5 for accommodating the baffle 43 is provided on the fluid pipeline 41. The cylinder is assembled on the control part 5. The cylinder adjusts the position of the baffle 43 according to the slit width.

[0071] The telescopic length of the cylinder is inversely proportional to the slit width. The larger the slit width, the shorter the telescopic length of the cylinder, and the baffle 43 rises to increase the fluid flow in the fluid pipeline 41. Conversely, the smaller the slit width, the longer the telescopic length of the cylinder, the baffle 43 descends, and the fluid flow in the fluid pipeline 41 decreases.

[0072] The maximum fluid flow rate during welding for the seam width is first determined by the seam width, that is, the fluid flow rate can be adjusted specifically according to different weld widths, which serves the purpose of preliminary gas saving and can also ensure the coverage of the protective gas.

[0073] The control component 42 is provided with a speed changing structure for driving the dynamic adjustment plate 44 to move. Through the speed changing structure, the dynamic adjustment plate 44 can adjust its position in real time, determine the different stages according to the changes in welding current, and adjust its flow according to the different stages to achieve the purpose of saving energy.

[0074] See Figure 4 A protrusion 441 is provided at the top of the dynamic adjustment plate 44 , and the rotating shaft connected at both ends of the protrusion 441 passes through the bracket 6 , and the bracket 6 is assembled on one side of the baffle 43 .

[0075] The protrusion 441 can rotate around the bracket 6 via the rotating shaft, thereby adjusting the angle of the dynamic adjustment plate 44 to further control the gas flow in the fluid pipeline 41;

[0076] See Figure 5 and Figure 6 The speed changing structure includes an adjusting plate 1 72 , an adjusting plate 2 73 , a micro cylinder 74 , a cylinder rod 75 and a positioning shaft 71 . The positioning shaft 71 is hinged between the adjusting plate 1 72 and the adjusting plate 2 73 . The positioning shaft 71 is hinged to the top end of the micro cylinder 74 . The cylinder rod 75 on the micro cylinder 74 is hinged to the movable slider on the dynamic adjusting plate 44 .

[0077] The movable slider can be connected to the cylinder parts, linear slide rails or screw structures on the dynamic adjustment plate 44. During the lifting and lowering process of the baffle 43, the cylinder rod 75 adjusts the telescopic distance of the cylinder rod 75 under the reciprocating movement of the movable slider, thereby changing the connection position between the dynamic adjustment plate 44 and the cylinder rod 75.

[0078] An upper baffle 8 and a lower baffle 9 are provided on the side surface of the baffle 43 , and the upper baffle 8 and the lower baffle 9 are staggered and abut against the upper and lower surfaces of the dynamic adjustment plate 44 .

[0079] The structure for driving the upper and lower baffles 8 and 9 to extend in an alternating manner is placed in the baffle 43. There are many structures for driving the upper and lower baffles 8 and 9 to rise and fall in an alternating manner. This embodiment provides a hinged connecting rod structure between the upper and lower baffles 8, and the middle part of the connecting rod rotates around the fulcrum inside the baffle 43. The electromagnetic structure of the upper baffle 8 is connected, that is, the side of the upper baffle 8 is connected with a magnetic sheet, and the energized coil is wound on the iron core, and an insulating spring is connected between the upper baffle 8 and the iron core. That is, when the baffle 43 descends, the energized coil is de-energized, and the insulating spring rebounds, pushing the upper baffle 8 out of the baffle 43 and against the upper surface of the dynamic adjustment plate 44, and the lower baffle 9 is retracted into the baffle 43. When the baffle 43 rises, the energized coil is energized to attract the upper baffle 8 and retract it into the baffle 43, while the lower baffle 9 extends out of the baffle 43 and against the lower surface of the dynamic adjustment plate 44.

[0080] When the baffle 43 moves up or down according to the slit width data, the dynamic adjustment plate 44 remains in a horizontal state.

[0081] The following is a detailed description of the structure for adjusting the fluid flow according to the welding current:

[0082] The baffle 43 lifting process is a detection process, during which the protective gas has not yet been introduced into the fluid pipeline 41.

[0083] As shown in Figure 7, when the narrow gap is detected, the flow of the protective gas needs to be reduced, and the cylinder drives the baffle 43 to descend. During the descent of the baffle 43, the upper baffle 8 extends and rests on the upper surface of the dynamic adjustment plate 44, so that the dynamic adjustment plate 44 can cooperate with the micro cylinder 74 to extend the cylinder rod 75 while following the descent of the baffle 43, that is, the dynamic adjustment plate 44 can be kept horizontal during the descent process, and the connection position of the cylinder rod 75 and the dynamic adjustment plate 44 can also be changed.

[0084] The telescopic length of the micro cylinder 74 is inversely proportional to the size of the welding current. That is, when the welding current is detected to be low, it can be known that it is in a non-welding state, and the cylinder rod 75 of the micro cylinder 74 is extended, allowing the dynamic adjustment plate 44 to rotate downward, and the rotation angle increases to reduce its gas flow. On the contrary, when the welding current is detected to increase, the cylinder rod 75 is shortened, the dynamic adjustment plate 44 moves upward, and rotates to a horizontal position and is blocked by the upper baffle 8.

[0085] The purpose of changing the connection position of the cylinder rod 75 and the dynamic adjustment plate 44 is that, since the position of the baffle 43 is changed for different weld widths, the diameter in the fluid pipeline 41 also changes in real time. Therefore, for different seam widths, if the position of the cylinder rod 75 and the dynamic adjustment plate 44 does not change, then for different weld widths, the two welding currents change during the welding process, and the length of the cylinder rod 75 extended is the same, which will make the angular rotation of the dynamic adjustment plate 44 consistent.

[0086] The angles of the two dynamic adjustment plates 44 are consistent, resulting in a smaller diameter of the fluid pipeline 41 in the narrow gap state, which leads to a decrease in the flow rate of the shielding gas, which may affect the multi-stage gas supply and affect the welding quality.

[0087] In order to solve the above problem, the present structure is configured to change the connection position of the slider.

[0088] like Figure 8 As shown, when facing a wide seam and a narrow seam, under the same welding current transformation, the extended length of the cylinder rod 75 is the same, wherein the extended length of the cylinder rod 75 is H, and the dynamic adjustment plate 44 rotates by an angle β, wherein the horizontal distance between the dynamic adjustment plate 44 and the connection point of the cylinder rod 75 before and after the rotation is set to M, Since the length of H is limited, the larger M is, the larger the value of cosβ is, and the smaller the angle β is. By changing the angle between the dynamic adjustment plate 44 and the cylinder rod 75, the rotation angle β of the dynamic adjustment plate 44 is changed.

[0089] The baffle 43 can be adjusted to different heights according to different welds, and the rotation angle of the dynamic adjustment plate 44 can be adjusted proportionally. That is, when facing a wide seam, under the same welding current, the adjustment angle of the dynamic adjustment plate 44 is large, while when facing a narrow seam, under the same welding current, the adjustment angle of the dynamic adjustment plate 44 is small, thereby realizing dynamic adjustment of the flow rate.

[0090] The above-mentioned structure can keep the baffle 43 and the dynamic adjustment plate 44 in a horizontal state during the lifting process, and can also dynamically adjust the flow of the fluid pipeline 41 according to different welding conditions.

[0091] According to the real-time changes of welding current, the gas flow rate is intelligently controlled, and the gas is supplied after special treatment without changing the gas formula, ensuring the welding quality while effectively reducing gas consumption.

[0092] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas saving device for welding shielding gas, characterized in that: include: A welding power source (1) has a wire extending therefrom that is divided into two paths through a current sensor (2), one path being connected to a welding robot and the other being connected to an air-saving device (4), wherein a welding circuit is formed between the welding power source (1) and the welding robot, and the current sensor (2) detects a current value of the welding circuit and transmits the current value to the air-saving device (4); A detector (3) for detecting the seam width of the workpiece to be welded and uploading the seam width data to the air-saving device (4); The air-saving device (4) is provided with a fluid pipeline (41) and a control member (42) therein, wherein the control member (42) first drives the baffle (43) in the fluid pipeline (41) to move according to the obtained seam width data to obtain the maximum flow rate of the welding seam width, and then changes the angle of the dynamic adjustment plate (44) on the baffle (43) according to the obtained welding current value to match the fluid flow rate in the fluid pipeline (41) with the welding current, and further controls the flow rate in the fluid pipeline (41) according to the current value; The inlet end of the fluid pipeline (41) is connected to the outlet end of the gas source, and the outlet end of the fluid pipeline (41) is connected to the welding robot through a pipeline.

2. A welding shielding gas saving device according to claim 1, characterized in that: The current sensor (2) comprises one or more of a current clamp, a current detector, and a multimeter.

3. A welding shielding gas saving device according to claim 1, characterized in that: The detector (3) includes one or more of a single-head parallel light width meter, a dual-head parallel light width meter, a wide-angle head width meter, a laser width meter, and a binocular vision width meter.

4. A welding shielding gas saving device according to claim 1, characterized in that: The fluid pipeline (41) is connected to the control member (42), and the air flow channel provided inside the control member (42) is communicated with the fluid pipeline (41). The control member (42) is provided with a power structure for driving the baffle (43) to move and a speed change structure for driving the dynamic adjustment plate (44) to move.

5. A welding shielding gas saving device according to claim 4, characterized in that: The power structure comprises a cylinder and a telescopic rod, the telescopic rod connected to the cylinder is connected to the baffle (43), a control part (5) for accommodating the baffle (43) is provided on the fluid pipeline (41), the cylinder is assembled on the control part (5), and the cylinder adjusts the position of the baffle (43) according to the size of the slit width.

6. A welding shielding gas saving device according to claim 5, characterized in that: The top end of the dynamic adjustment plate (44) is provided with a protrusion (441), and the rotating shaft connected to the two ends of the protrusion (441) passes through the bracket (6), and the bracket (6) is assembled on a side surface of the baffle (43).

7. A welding shielding gas saving device according to claim 6, characterized in that: The speed change structure includes a positioning shaft (71), an adjusting plate 1 (72), an adjusting plate 2 (73), a micro cylinder (74) and a cylinder rod (75); the adjusting plate 1 (72) and the adjusting plate 2 (73) are fixed on the baffle (43); and the positioning shaft (71) is hinged between the adjusting plate 1 (72) and the adjusting plate 2 (73); The positioning shaft (76) is hinged to the top end of the micro cylinder (74), and the cylinder rod (75) on the micro cylinder (74) is hinged to the movable slider on the dynamic adjustment plate (44).

8. A welding shielding gas saving device according to claim 9, characterized in that: Upper baffles (8) and lower baffles (9) that extend in a staggered manner are provided on the side surface of the baffle (43), and the upper baffles (8) and the lower baffles (9) are staggered against the upper and lower surfaces of the dynamic adjustment plate (44).

9. A welding shielding gas saving device according to claim 8, characterized in that: The telescopic length of the micro cylinder (74) is inversely proportional to the magnitude of the welding current, and the telescopic length of the cylinder is inversely proportional to the seam width.

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