Welding device for mechanical manufacturing and using method thereof

Abstract

The invention relates to the technical field of plasma arc welding machines, and discloses a welding device for mechanical manufacturing and a using method thereof.The welding device comprises a welding machine body, a wire feeder and a welding gun, and the outer side of the welding gun is connected with a fixing frame. According to the welding device for mechanical manufacturing, the two mounting frames and the grinding wheel are arranged on the outer side of the welding gun, so that the welding gun can grind a welding point before welding, oxide or dust is prevented from being attached to the welding point, air holes are prevented from being formed in the welding point in the later period, and the welding quality is effectively improved; the distance between the polishing wheel and the welding gun can be the distance between two welding points, so that when the welding gun moves for welding, the polishing wheel polishes the next welding point in advance, advanced polishing is not needed, and the welding efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of plasma arc welding machine technology, specifically to a mechanically manufactured welding device and its usage method. Background Technology

[0002] In mechanical manufacturing, welding is a crucial process for joining metal parts, directly affecting the structural strength, sealing performance, and service life of products. Plasma arc welding machines, with their advantages of high energy density, stable arc, and small heat-affected zone, have become the preferred equipment for high-precision, high-quality welding needs. Especially in aerospace, automotive manufacturing, and precision instrumentation fields, where the requirements for welding quality and efficiency are extremely high, traditional welding methods (such as manual arc welding and gas shielded welding) are insufficient. Plasma arc welding technology can significantly improve welding quality and reduce rework rates.

[0003] A plasma arc welding machine mainly consists of a welding power source, a control system, a welding torch, a gas system, and a water system. The welding power source provides high-frequency, high-voltage arc ignition, generating a free arc between the tungsten electrode of the welding torch and the workpiece. Through the special structure of the welding torch, the free arc is subjected to the combined effects of three factors: mechanical compression (nozzle orifice limitation), thermal contraction (the water-cooled nozzle causes the surrounding gas to cool and contract), and magnetic contraction (the arc's own magnetic field causes contraction of the arc), forming a plasma arc. The plasma arc is sprayed at high speed onto the surface of the workpiece, causing localized melting of the workpiece to form a molten pool. Simultaneously, filler metal (if necessary) is added to the molten pool, and after cooling, a weld is formed, thus achieving welding.

[0004] However, existing plasma arc welding machines still have the following shortcomings: When using the welding torch of an existing plasma arc welding machine to weld metal railings, various impurities such as oxides and dust often adhere to the surface of the metal railings. When the high-temperature environment is generated during the welding process, these impurities will undergo a reduction and volatilization reaction. This phenomenon not only induces uncontrolled and rampant sparks during the welding process, increasing the operational risk and difficulty, but also causes bubbles to form at the weld point after welding, damaging the density of the weld. At the same time, it also significantly reduces the strength of the weld point, seriously affecting the welding quality and structural stability, and bringing potential hazards to subsequent use and maintenance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a welding device for mechanical manufacturing and its usage method, thereby solving the problems raised in the background art. It facilitates the grinding of the outer wall of the railing to be welded before welding with a welding gun, preventing impurities such as oxides and dust from affecting the welding quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding device for mechanical manufacturing, comprising a welding machine body, a wire feeder, and a welding gun, wherein a fixed frame is connected to the outside of the welding gun, two symmetrically arranged mounting frames are connected to the bottom of the fixed frame, a grinding wheel is rotatably connected between the two mounting frames, the grinding wheel is rotatably connected to the mounting frame via a shaft, a drive assembly is connected to the outside of the shaft of the grinding wheel, a dust adsorption assembly is connected between the two mounting frames, a fume adsorption assembly is connected to the top of the welding gun, and a support assembly is connected to the outside of the fixed frame.

[0007] Furthermore, the drive assembly includes a motor, which is fixedly mounted on the outer wall of one of the mounting brackets. The output shaft of the motor passes through one end of the mounting bracket and is fixedly connected to a main gear. A driven gear is fixedly sleeved on the outer side of the grinding wheel shaft. The driven gear meshes with the main gear. A base plate is fixedly connected to the bottom of the mounting bracket. A controller is fixedly connected to the top surface of the base plate. A control switch is provided on the outer side of the controller. The controller, control switch, and motor are electrically connected via wires. The control switch is located near the welding gun handle switch. The power supply of the controller is electrically connected to the welding machine body via a cable.

[0008] Furthermore, the dust adsorption assembly includes a negative pressure pump, an air suction pipe connected to the outer end of the negative pressure pump, two dust suction hoods connected to the outer side of the grinding wheel, a fixing pipe fixedly connected between the two mounting brackets, two connecting pipes connected to the dust suction hoods fixedly connected to the outer side of the fixing pipe, the air suction pipe communicating with the fixing pipe, and an elastic element connected to the dust suction hood.

[0009] Furthermore, the elastic element includes a support plate, the top of which is fixedly connected to the inner wall of the two mounting brackets. Sliding rods are fixedly connected to the ends of the two dust collection hoods. The sliding rods pass through the support plate and are slidably connected to it. The two sliding rods are staggered. Connecting springs are sleeved on the outer sides of the two sliding rods. One end of each connecting spring is fixedly connected to the dust collection hood, and the other end abuts against the support plate. The negative pressure pump is fixedly installed on the top of the wire feeder. The power supply of the negative pressure pump is electrically connected to the control module of the wire feeder. A filter box is connected between the suction pipe and the negative pressure pump, and a filter element is detachably connected inside the filter box.

[0010] Furthermore, the flue gas adsorption assembly includes a gas guide pipe, and a flue gas adsorption pipe communicating with a fixed pipe is provided inside the gas guide pipe. The end of the flue gas adsorption pipe is connected to a fume hood that is detachably connected to the gas guide pipe. The fume hood is located outside the welding head of the welding gun, and the other end of the gas guide pipe is fixedly connected to the fixed pipe.

[0011] Furthermore, the support assembly includes a movable plate, with movable wheels rotatably connected to both sides of the outer wall of the movable plate, a support rod connected to the top of the movable plate, a transverse rod rotatably connected to the top of the support rod, a connecting block fixedly connected to the outer wall of the fixed frame, the end of the transverse rod engaging with the connecting block, a lever fixedly connected to the outer wall of the support rod, and an extrusion member connected to the outer side of the movable plate.

[0012] Furthermore, the extrusion member includes a side abutment plate, a connecting rod is fixedly connected to the side abutment plate near the movable plate, the connecting rod is slidably connected to the movable plate, and multiple sets of ball bearings are rotatably embedded on the side of the side abutment plate away from the connecting rod. A support spring is sleeved on the outer side of the connecting rod, one end of the support spring is fixedly connected to the outer wall of the side abutment plate, and the other end abuts against the side wall of the movable plate. A lower rod is fixedly connected to the top of the movable plate, and a movable rod is fixedly connected to the top of the lower rod. The movable rod is slidably connected to the support rod, and a return spring is sleeved on the outer wall of the movable rod, one end of the return spring is fixedly connected to the lower rod, and the other end abuts against the bottom of the support rod.

[0013] Furthermore, the fixing frame includes two U-shaped rings, which are respectively sleeved on the outer wall of the welding gun, and the outer sides of the two U-shaped rings are fixedly installed on the outside of the welding gun by bolts.

[0014] Furthermore, a rotating component is connected to the bottom of the mounting frame and the fixed frame. The rotating component includes a bottom rod. A top plate is connected to the top of the mounting frame. A telescopic rod that is slidably connected to the mounting frame is fixedly connected to the bottom surface of the top plate. A pressure spring is sleeved on the outer wall of the telescopic rod. One end of the pressure spring is fixedly connected to the top plate, and the other end abuts against the top surface of the mounting frame. A fixed shaft is fixedly connected between the two top plates. The bottom rod is sleeved on the outside of the fixed shaft. A limit groove is opened on the outside of the fixed shaft. A limit strip corresponding to the limit groove is fixedly connected in the shaft groove of the bottom rod.

[0015] A method of using a welding apparatus for mechanical manufacturing includes the following steps: Step a, Assemble and debug the equipment: The two U-shaped rings of the fixing frame are placed on the outer wall of the welding gun and tightened with bolts to ensure a firm connection between the fixing frame and the welding gun. The angle of the mounting frame is adjusted by rotating the component so that the distance between the grinding wheel and the welding head of the welding gun is equal to the distance between the horizontal and vertical bars of the railing to be welded. Step b, welding: The user simultaneously squeezes the controller and control switch to start the motor and welding gun. Then, the user aligns the grinding wheel with the first welding point (the connection between the horizontal and vertical bars), finely adjusts the mounting bracket to make the grinding wheel contact the workpiece surface, maintains constant pressure under the action of the connecting spring, and then moves the welding gun along the welding point to perform welding. Step c, post-weld treatment: After welding is completed, release the control switch and controller of the welding gun. The motor and negative pressure pump will stop automatically. Turn off the power of the welding machine body. Then open the filter box, disassemble the filter for replacement or cleaning, clean the adhering substances on the surface of the grinding wheel, check the gear meshing status and the elasticity of the connecting springs, and lubricate the bearings of the moving wheel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This type of welding device, manufactured by mechanical means, uses two mounting brackets and a grinding wheel on the outside of the welding gun to grind the welding points before welding. This prevents oxides or dust from adhering to the welding points, which could lead to porosity in the later welding process, thus effectively improving welding quality. By adjusting the mounting brackets, the distance between the grinding wheel and the welding gun can be set to the distance between two welding points. This allows the grinding wheel to pre-grind the next welding point while the welding gun is moving to weld, eliminating the need for pre-grinding and effectively improving welding efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a three-dimensional structural diagram of the filter box and negative pressure pump of the present invention. Figure 3 This is a three-dimensional structural diagram of the welding gun, grinding wheel, and dust hood of the present invention; Figure 4 This is a three-dimensional structural diagram of the mounting bracket and grinding wheel of the present invention. Figure 5 This is a three-dimensional structural diagram of the movable plate and side abutment plate of the present invention; Figure 6 This is a three-dimensional structural diagram of the grinding wheel, motor, and main gear of the present invention. Figure 7 This is a three-dimensional structural diagram of the unfolded side abutment plate and movable plate of the present invention; Figure 8 This is a three-dimensional structural diagram of the dust hood and fume hood of the present invention when unfolded; Figure 9 For the present invention Figure 6 Enlarged 3D structural diagram at point A; Figure 10 This is a three-dimensional structural diagram of the side abutment plate and ball bearings of the present invention.

[0018] In the diagram: 1. Welding machine body; 2. Wire feeder; 3. Welding gun; 4. Grinding wheel; 5. Mounting bracket; 6. Fixed bracket; 7. Moving plate; 8. Dust hood; 9. Moving wheels; 10. Side support plate; 11. Support rod; 12. Suction pipe; 13. Cable; 14. Support plate; 15. Motor; 16. Air duct; 17. Fume hood; 18. Base plate; 19. Controller; 20. Connecting block; 21. Base rod; 22. Top plate; 23. Main gear; 24. Driven gear; 25. Connecting pipe; 26. Fixed pipe; 27. Lower rod; 28. Horizontal rod; 29. ​​Moving rod; 30. Return spring; 31. Connecting rod; 32. Support spring; 33. Paddle; 34. Sliding rod; 35. Connecting spring; 36. Filter box; 37. Negative pressure pump; 38. Telescopic rod; 39. Pressure spring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Please see Figures 1 to 10 A welding device manufactured by machinery includes a welding machine body 1, a wire feeder 2, and a welding gun 3. A fixed frame 6 is connected to the outside of the welding gun 3. Two symmetrically arranged mounting brackets 5 are connected to the bottom of the fixed frame 6. A grinding wheel 4 is rotatably connected between the two mounting brackets 5. The grinding wheel 4 is rotatably connected to the mounting bracket 5 through a shaft. A drive assembly is connected to the outside of the shaft of the grinding wheel 4. A dust adsorption assembly is connected between the two mounting brackets 5. A fume adsorption assembly is connected to the top of the welding gun 3. A support assembly is connected to the outside of the fixed frame 6.

[0021] The mechanical manufacturing welding device of the present invention can first start the drive component when it is necessary to weld the railing, so that the drive component works and drives the grinding wheel 4 to rotate. The grinding wheel 4 grinds the connection between the horizontal and vertical bars of the railing, so that the dust after grinding is adsorbed by the dust adsorption component. There is a certain distance between the grinding wheel 4 and the welding gun 3, and the grinding wheel 4 is mounted on the mounting bracket 5. The mounting bracket 5 and the fixed bracket 6 are rotatably connected. Therefore, the distance of the grinding wheel 4 on the mounting bracket 5 can be adjusted. This distance can be the distance between the two crossbars. When the welding gun 3 is performing plasma arc welding, the grinding wheel 4 works simultaneously and can grind the connection between the horizontal and vertical bars of the railing to be welded. This ensures that when the welding gun 3 moves to the next welding point after completing the previous welding point, the welding point has been pre-ground cleaned by the grinding wheel 4, and the dust is also adsorbed by the dust adsorption component, thus making the welding position easier for the welding gun 3 to weld. By setting two mounting brackets 5 and a grinding wheel 4 on the outside of the welding gun 3, the welding gun 3 can grind the welding point before welding, avoiding oxides or dust adhering to the welding point and causing porosity in the welding point later, thus effectively improving the welding quality. By adjusting the mounting brackets 5, the distance between the grinding wheel 4 and the welding gun 3 can be made to be the distance between two welding points, so that when the welding gun 3 moves to weld, the grinding wheel 4 grinds the next welding point in advance, eliminating the need for pre-grinding and effectively improving welding efficiency.

[0022] As a preferred embodiment of the present invention, the drive assembly includes a motor 15, which is fixedly mounted on the outer wall of one of the mounting brackets 5. The output shaft of the motor 15 passes through the mounting bracket 5 and is fixedly connected to a main gear 23. A driven gear 24 is fixedly sleeved on the outer side of the shaft of the grinding wheel 4. The driven gear 24 meshes with the main gear 23. A base plate 18 is fixedly connected to the bottom of the mounting bracket 6. A controller 19 is fixedly connected to the top surface of the base plate 18. A control switch is provided on the outer side of the controller 19. The controller 19, the control switch and the motor 15 are electrically connected by wires. The control switch is located near the handle switch of the welding gun 3. The power supply of the controller 19 is electrically connected to the welding machine body 1 through a cable 13.

[0023] Specifically, when the grinding wheel 4 needs to rotate, the user holds the handle of the welding gun 3 and squeezes the switch to start the welding gun 3. At this time, the controller 19 and the control switch are located on the side of the switch on the handle of the welding gun 3. This setting makes it convenient for the user to hold the welding gun 3 while squeezing the control switch on the controller 19 with their fingers to turn on the motor 15. After the motor 15 is turned on, its output shaft rotates, driving the main gear 23 to mesh with the driven gear 24, which in turn drives the shaft of the grinding wheel 4 connected to the driven gear 24 to rotate, thereby starting the grinding wheel 4 to rotate.

[0024] As a preferred embodiment of the present invention, the dust adsorption assembly includes a negative pressure pump 37, an air suction pipe 12 connected to the outer end of the negative pressure pump 37, two dust suction hoods 8 connected to the outer side of the grinding wheel 4, a fixing pipe 26 fixedly connected between the two mounting brackets 5, two connecting pipes 25 fixedly connected to the outer side of the fixing pipe 26 and connected to the dust suction hoods 8, the air suction pipe 12 and the fixing pipe 26 are connected in communication, and an elastic element is connected to the dust suction hoods 8.

[0025] Specifically, when the welding gun 3 is working, the negative pressure pump 37 can always be started. When the negative pressure pump 37 is working, it sucks air from the two dust hoods 8 through the suction pipe 12, the fixed pipe 26 and the connecting pipe 25 to adsorb the dust after grinding by the grinding wheel 4, ensuring that there is no dust at the welding point, improving the welding quality, and reducing the sparks caused by dust coming into contact with high temperature during plasma arc welding.

[0026] As a preferred embodiment of the present invention, the elastic element includes a support plate 14, the top of which is fixedly connected to the inner wall of two mounting brackets 5. Sliding rods 34 are fixedly connected to the ends of two dust collection hoods 8. The sliding rods 34 pass through the support plate 14 and are slidably connected thereto. The two sliding rods 34 are staggered. Connecting springs 35 are sleeved on the outer sides of the two sliding rods 34. One end of each connecting spring 35 is fixedly connected to the dust collection hood 8, and the other end abuts against the support plate 14. A negative pressure pump 37 is fixedly installed on the top of the wire feeder 2. The power supply of the negative pressure pump 37 is electrically connected to the control module of the wire feeder 2. A filter box 36 is connected between the suction pipe 12 and the negative pressure pump 37. A filter element is detachably connected inside the filter box 36.

[0027] Specifically, when the dust hood 8 is in operation, in order to improve the applicability of the dust hood 8, when the dust hood 8 abuts against the railing, the sliding rod 34 at its end will slide on the support plate 14. Since the sliding rod 34 is set as an arc rod, the sliding rod 34 can smoothly retract in the axial direction of the grinding wheel 4. This ensures that the dust hood 8 will not obstruct the contact between the grinding wheel 4 and the point to be welded, thus improving the applicability of the dust hood 8. To prevent the dust cover 8 from not descending after retracting, the connecting spring 35 is compressed when the dust cover 8 retracts. After the dust cover 8 leaves the obstruction, it will unfold again under the force of the connecting spring 35, thus ensuring that the dust cover 8 has good dust adsorption performance.

[0028] As a preferred technical solution of the present invention, the flue gas adsorption assembly includes a gas guide pipe 16, a flue gas adsorption pipe communicating with a fixed pipe 26 is provided inside the gas guide pipe 16, and a smoke hood 17 is detachably connected to the gas guide pipe 16 at the end of the flue gas adsorption pipe. The smoke hood 17 is located outside the welding head of the welding gun 3, and the other end of the gas guide pipe 16 is fixedly connected to the fixed pipe 26.

[0029] Specifically, when the welding gun 3 generates fumes during welding, the air guide tube 16 can be rotated to fix the fume adsorption tube and the fume hood 17 to the outside of the end of the welding gun 3. The air guide tube 16 has the properties of flexibility and stability, so the fume hood 17 can stably adsorb the fumes on the outside of the welding gun head. The adsorbed fumes enter the fixed tube 26 and the suction tube 12 through the fume adsorption tube. The gas adsorbed by the dust hood 8 and the fume hood 17 will pass through the filter box 36. The filter element in the filter box 36 can be existing technologies such as honeycomb activated carbon or activated carbon filter element. These filter elements are all existing mature technologies and are designed to filter dust and harmful gases generated during welding in the intake pipe 12. Therefore, they will not be described in detail here. After filtration, the gas enters the negative pressure pump 37 to complete the adsorption and filtration of dust and harmful gases.

[0030] As a preferred embodiment of the present invention, the support assembly includes a movable plate 7, movable wheels 9 are rotatably connected to both sides of the outer wall of the movable plate 7, a support rod 11 is connected to the top of the movable plate 7, a transverse rod 28 is rotatably connected to the top of the support rod 11, a connecting block 20 is fixedly connected to the outer wall of the fixed frame 6, the end of the transverse rod 28 is snapped into the connecting block 20, a paddle 33 is fixedly connected to the outer wall of the support rod 11, and an extrusion member is connected to the outer side of the movable plate 7.

[0031] Specifically, to make the welding gun 3 more labor-saving and convenient to use, when welding the welding points of the railing, the support rod 11 can be rotated so that the support rod 11 rotates outside the horizontal bar 28. After adjusting the angle, the movable plate 7 can be placed horizontally on the table or ground. During the welding process, the worker needs to hold the welding gun 3 to weld. The support component is only to provide some support for the welding gun 3 to save the worker's physical strength when lifting the welding gun 3. During welding, the welding gun 3 still needs to move to achieve more precise and complete welding. Therefore, there is no need to restrict the support rod 11 and the horizontal bar 28, otherwise it will affect the use of the welding gun 3. Since the railing is mostly placed on a flat table or ground during welding, the movable plate 7 is equipped with movable wheels 9 on both sides. When the welding gun 3 moves to weld, the movable wheels 9 move. This setting allows the welding gun 3 to be supported by the support rod 11 during welding, while also ensuring the movement of the welding gun 3.

[0032] As a preferred embodiment of the present invention, the extrusion component includes a side abutment plate 10. A connecting rod 31 is fixedly connected to the side of the side abutment plate 10 near the moving plate 7. The connecting rod 31 is slidably connected to the moving plate 7. Multiple sets of ball bearings are rotatably embedded on the side of the side abutment plate 10 away from the connecting rod 31. A support spring 32 is sleeved on the outer side of the connecting rod 31. One end of the support spring 32 is fixedly connected to the outer wall of the side abutment plate 10, and the other end abuts against the side wall of the moving plate 7. A lower rod 27 is fixedly connected to the top of the moving plate 7. A moving rod 29 is fixedly connected to the top of the lower rod 27. The moving rod 29 is slidably connected to the support rod 11. A return spring 30 is sleeved on the outer wall of the moving rod 29. One end of the return spring 30 is fixedly connected to the lower rod 27, and the other end abuts against the bottom of the support rod 11.

[0033] With the reset spring 30, when welding workpieces of different heights or curved surfaces, the support rod 11 will slide up and down along the moving rod 29 (for example, when the height of the welding point changes). At this time, the reset spring 30 will be compressed or stretched. When welding is completed or the position of the support rod 11 needs to be readjusted, the elastic potential energy of the reset spring 30 will drive the support rod 11 to slide along the moving rod 29 and return to the initial natural elongation state (the position when no force is applied), which facilitates quick positioning during the next welding operation and improves operating efficiency.

[0034] Specifically, when the movable plate 7 moves, the side abutment plate 10 can first abut against the outer wall of the railing. When the welding gun 3 moves, the fixed frame 6 drives the horizontal bar 28 to move, which in turn drives the support rod 11 and the movable plate 7 to move under the rotation of the movable wheel 9. At the same time, the movable plate 7 drives the connecting rod 31, which in turn drives the side abutment plate 10 to move. Meanwhile, the ball bearings ensure that the side abutment plate 10 can move against the outer wall of the railing, ensuring that the movement of the welding gun 3 is at the same level, which is more labor-saving and convenient. The connecting rod 31 slides within the movable plate 7, and the supporting spring 32 on the outside of the connecting rod 31 can use the spring potential energy to keep the side abutment plate 10 abutting against the outer wall of the railing at all times. When the welding gun 3 is not used for a short period of time, the support spring 32 will push the side plate 10 out under the force and push it to the other side of the welding gun 3, so that the moving wheel 9 and the side plate 10 form a support structure. This can support the welding gun 3, prevent the welding gun 3 from being placed directly on the ground, and also make it convenient to pick it up for the next use. The end of the horizontal bar 28 is engaged with the connecting block 20 by a locking block. This design facilitates the disassembly of the support assembly, making it easier to install and use the welding gun 3 flexibly.

[0035] As a preferred embodiment of the present invention, the fixing frame 6 includes two U-shaped rings, which are respectively sleeved on the outer wall of the welding gun 3, and the outer sides of the two U-shaped rings are fixedly installed on the outer side of the welding gun 3 by bolts.

[0036] Specifically, when the fixing frame 6 is connected to the welding gun 3, the bolts on both sides can be rotated to separate them from the lower U-shaped ring, thereby separating the two U-shaped rings. This facilitates the disassembly and installation of the grinding wheel 4 and the mounting frame 5, making it easier to use the welding gun 3 flexibly.

[0037] As a preferred embodiment of the present invention, the mounting frame 5 and the fixed frame 6 are connected to a rotating component at their bottoms. The rotating component includes a bottom rod 21. The top of the mounting frame 5 is connected to a top plate 22. The bottom surface of the top plate 22 is fixedly connected to a telescopic rod 38 that is slidably connected to the mounting frame 5. A pressure spring 39 is sleeved on the outer wall of the telescopic rod 38. One end of the pressure spring 39 is fixedly connected to the top plate 22, and the other end abuts against the top surface of the mounting frame 5. A fixed shaft is fixedly connected between the two top plates 22. The bottom rod 21 is sleeved on the outside of the fixed shaft. A limit groove is opened on the outside of the fixed shaft. A limit strip corresponding to the limit groove is fixedly connected in the shaft groove of the bottom rod 21.

[0038] Specifically, in order to make the degree of freedom of the mounting frame 5 more easily adjustable when rotating, when the mounting frame 5 rotates, it drives the fixed shaft between the telescopic rod 38 and the two top plates 22 to rotate, so that the limiting strip inside the bottom rod 21 is misaligned and engaged with the limiting groove outside the fixed shaft, thereby enabling the mounting frame 5 to rotate and adjust. When the distance between the grinding wheel 4 and the gun head of the welding gun 3 needs to be adjusted, rotating the mounting frame 5 can also satisfy the rotation of the grinding wheel 4. The limiting strip is made of deformable materials such as silicone and rubber. When the mounting bracket 5 is rotated, the fixed shaft will squeeze the limiting strip, causing it to deform, thereby enabling the mounting bracket 5 to rotate. After rotating a certain angle, the limiting strip will enter another limiting groove to fix the mounting bracket 5. The mounting bracket 5 has a telescopic rod 38 that slides on top and is connected to the top plate 22. Under the action of the pressure spring 39, the grinding wheel 4 can exert a certain amount of pressure when it contacts the point to be welded, thus ensuring the grinding effect.

[0039] In the above structure, the motor 15, the negative pressure pump 37, the controller 19, and the control switch are all existing mature technologies, so they will not be described in detail here.

[0040] A method of using a welding apparatus for mechanical manufacturing includes the following steps: Step a, Assemble and debug the equipment: The two U-shaped rings of the fixing frame 6 are fitted onto the outer wall of the welding gun 3 and secured with bolts to ensure a firm connection between the fixing frame 6 and the welding gun 3. The angle of the mounting frame 5 is adjusted by rotating the component so that the distance between the grinding wheel 4 and the welding head of the welding gun 3 is equal to the distance between the horizontal and vertical bars of the railing to be welded. Step b, welding: The user simultaneously squeezes the controller 19 and the control switch to start the motor 15 and the welding gun 3. Then, the user aligns the grinding wheel 4 with the first welding point (the connection between the horizontal and vertical bars), finely adjusts the mounting bracket 5 to make the grinding wheel 4 contact the workpiece surface, maintains constant pressure under the action of the connecting spring 35, and then moves the welding gun 3 along the welding point to perform welding. Step c, post-weld treatment: After welding is completed, release the control switch of welding gun 3 and controller 19. Motor 15 and negative pressure pump 37 will stop automatically. Turn off the power of welding machine body 1. Then open filter box 36, disassemble filter components for replacement or cleaning, clean the surface of grinding wheel 4, check the gear meshing status and the elasticity of springs such as connecting spring 35, and lubricate the bearing of moving wheel 9.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanically manufactured welding apparatus, comprising a welding machine body (1), a wire feeder (2), and a welding torch (3), characterized in that, A fixing frame (6) is connected to the outside of the welding gun (3). Two symmetrically arranged mounting brackets (5) are connected to the bottom of the fixing frame (6). A grinding wheel (4) is rotatably connected between the two mounting brackets (5). The grinding wheel (4) is rotatably connected to the mounting bracket (5) via a shaft. A drive assembly is connected to the outside of the shaft of the grinding wheel (4). A dust adsorption assembly is connected between the two mounting brackets (5). A fume adsorption assembly is connected to the top of the welding gun (3). The fixing frame (6) is connected to the outside of the shaft. The dust adsorption assembly includes a negative pressure pump (37), the outer end of which is connected to a suction pipe (12). Two dust hoods (8) are connected to the outer side of the grinding wheel (4). A fixing pipe (26) is fixedly connected between the two mounting brackets (5). Two connecting pipes (25) connected to the dust hoods (8) are fixedly connected to the outer side of the fixing pipe (26). The suction pipe (12) is connected to the fixing pipe (26). An elastic element is connected to the dust hood (8).

2. The welding device for mechanical manufacturing according to claim 1, characterized in that, The drive assembly includes a motor (15), which is fixedly mounted on the outer wall of one of the mounting brackets (5). The output shaft of the motor (15) passes through the mounting bracket (5) and is fixedly connected to a main gear (23). A driven gear (24) is fixedly sleeved on the outer side of the shaft of the grinding wheel (4). The driven gear (24) meshes with the main gear (23). A base plate (18) is fixedly connected to the bottom of the mounting bracket (6). A controller (19) is fixedly connected to the top surface of the base plate (18). A control switch is provided on the outer side of the controller (19). The controller (19), the control switch and the motor (15) are electrically connected by wires. The control switch is close to the handle switch of the welding gun (3). The power supply of the controller (19) is electrically connected to the welding machine body (1) through a cable (13).

3. The welding device for mechanical manufacturing according to claim 2, characterized in that, The elastic element includes a support plate (14), the top of which is fixedly connected to the inner wall of two mounting brackets (5), and the ends of the two dust hoods (8) are fixedly connected to sliding rods (34). The sliding rods (34) pass through the support plate (14) and are slidably connected to it. The two sliding rods (34) are staggered. The outer sides of the two sliding rods (34) are fitted with connecting springs (35). One end of the two connecting springs (35) is fixedly connected to the dust hood (8), and the other end abuts against the support plate (14). The negative pressure pump (37) is fixedly installed on the top of the wire feeder (2). The power supply of the negative pressure pump (37) is electrically connected to the control module of the wire feeder (2). A filter box (36) is connected between the suction pipe (12) and the negative pressure pump (37). A filter element is detachably connected inside the filter box (36).

4. The welding device for mechanical manufacturing according to claim 3, characterized in that, The flue gas adsorption assembly includes an air guide pipe (16), and a flue gas adsorption pipe communicating with a fixed pipe (26) is provided inside the air guide pipe (16). The end of the flue gas adsorption pipe is connected to a fume hood (17) that is detachably connected to the air guide pipe (16). The fume hood (17) is located outside the welding head of the welding gun (3). The other end of the air guide pipe (16) is fixedly connected to the fixed pipe (26).

5. The welding device for mechanical manufacturing according to claim 4, characterized in that, The support assembly includes a movable plate (7), with movable wheels (9) rotatably connected to both sides of the outer wall of the movable plate (7), a support rod (11) connected to the top of the movable plate (7), a transverse rod (28) rotatably connected to the top of the support rod (11), a connecting block (20) fixedly connected to the outer wall of the fixed frame (6), the end of the transverse rod (28) being snapped into the connecting block (20), a paddle (33) fixedly connected to the outer wall of the support rod (11), and an extrusion piece connected to the outer side of the movable plate (7).

6. The welding apparatus for mechanical manufacturing according to claim 5, characterized in that, The extrusion component includes a side abutment plate (10), a connecting rod (31) is fixedly connected to the side of the side abutment plate (10) near the moving plate (7), the connecting rod (31) is slidably connected to the moving plate (7), a plurality of balls are rotatably embedded on the side of the side abutment plate (10) away from the connecting rod (31), a support spring (32) is sleeved on the outside of the connecting rod (31), one end of the support spring (32) is fixedly connected to the outer wall of the side abutment plate (10), and the other end abuts against the side wall of the moving plate (7), a lower rod (27) is fixedly connected to the top of the moving plate (7), a moving rod (29) is fixedly connected to the top of the lower rod (27), the moving rod (29) is slidably connected to the support rod (11), a return spring (30) is sleeved on the outer wall of the moving rod (29), one end of the return spring (30) is fixedly connected to the lower rod (27), and the other end abuts against the bottom of the support rod (11).

7. A welding apparatus for mechanical manufacturing according to claim 6, characterized in that, The fixing frame (6) includes two U-shaped rings, which are respectively fitted onto the outer wall of the welding gun (3). The outer sides of the two U-shaped rings are fixedly installed on the outer side of the welding gun (3) by bolts.

8. The welding apparatus for mechanical manufacturing according to claim 7, characterized in that, The mounting bracket (5) and the bottom of the fixed bracket (6) are connected to a rotating component, which includes a bottom rod (21). The top of the mounting bracket (5) is connected to a top plate (22). The bottom surface of the top plate (22) is fixedly connected to a telescopic rod (38) that is slidably connected to the mounting bracket (5). A pressure spring (39) is sleeved on the outer wall of the telescopic rod (38). One end of the pressure spring (39) is fixedly connected to the top plate (22), and the other end abuts against the top surface of the mounting bracket (5). A fixed shaft is fixedly connected between the two top plates (22). The bottom rod (21) is sleeved on the outside of the fixed shaft. A limit groove is opened on the outside of the fixed shaft. A limit strip corresponding to the limit groove is fixedly connected in the shaft groove of the bottom rod (21).

9. A method of using a welding apparatus based on the mechanical manufacturing process described in claim 6, characterized in that, Includes the following steps: Step a, Assemble and debug the equipment: The two U-shaped rings of the fixing frame (6) are fitted onto the outer wall of the welding gun (3) and tightened with bolts to ensure that the fixing frame (6) and the welding gun (3) are firmly connected. The angle of the mounting frame (5) is adjusted by rotating the component so that the distance between the grinding wheel (4) and the welding head of the welding gun (3) is equal to the distance between the horizontal and vertical bars of the railing to be welded. Step b, welding: The user simultaneously squeezes the controller (19) and the control switch to start the motor (15) and the welding gun (3). Then, the user aligns the grinding wheel (4) with the first welding point (the connection between the horizontal bar and the vertical bar), finely adjusts the mounting bracket (5) to make the grinding wheel (4) contact the workpiece surface, maintains constant pressure under the action of the connecting spring (35), and then moves the welding gun (3) along the welding point to perform welding. Step c, post-weld treatment: After welding is completed, release the control switch and controller (19) of the welding gun (3). The motor (15) and negative pressure pump (37) will stop automatically. Turn off the power of the welding machine body (1). Then open the filter box (36), disassemble the filter for replacement or cleaning, and clean the surface of the grinding wheel (4). Check the meshing state of the gears and the elasticity of the connecting springs (35). Lubricate the bearing of the moving wheel (9).

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