Plasma arc welding machine with adjustable welding angle for metal products

Abstract

The invention relates to the technical field of plasma arc welding machines, and discloses a welding-angle-adjustable plasma arc welding machine for metal products, which comprises a base, a first air cylinder, a second air cylinder, a third air cylinder and a fourth air cylinder, the fixing assembly is arranged at the top of the base; wherein the fixing assembly comprises a fixing part and a collecting part, and the fixing part and the collecting part are both arranged at the top of the base. By arranging an adjusting part, after a to-be-machined metal product is clamped and fixed, if the welding position is not in a welding area, a gear motor is started, a rotating shaft bottom frame rotates, the angle of the metal product is changed, meanwhile, a first air cylinder is started, the height of the metal product is adjusted, and the metal product and a welding gun are located at the same horizontal height position; and when the first motor is started, the bottom frame rotates, the welding face of the metal product is changed, and the effect of conveniently welding different positions of the metal product is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of plasma arc welding machines, in particular to a plasma arc welding machine for metal products with adjustable welding angle. Background Art

[0002] Plasma arc welding machine is a kind of equipment that uses plasma arc for welding. It generates high-temperature ion gas flow by ionizing plasma gas, which is ejected from the fine hole of the nozzle and compressed to form a slender arc column. Its temperature can reach 18,000 to 24,000 K, which is much higher than the temperature of ordinary free arc (such as the temperature range of argon arc welding is 5000-8000 K). This high-temperature plasma arc has the characteristics of slender arc column and high energy density, which makes it widely used in the field of welding. The working principle of plasma arc welding machine is based on pre-programmed digital instruction program, and the moving cutting torch performs automatic thermal cutting. Therefore, it is not only suitable for welding, but also for automatic thermal cutting.

[0003] The characteristics of plasma arc welding machine include concentrated energy, stable arc, small heat-affected zone, small welding deformation, high production efficiency, fast welding speed, small weld defects, high welding quality, various weldable materials, wide rigidity and flexibility adjustment range, and good repeatability. In addition, plasma arc welding machine also has extremely strong penetrating power and can weld stainless steel plates below 12mm in one go without beveling.

[0004] At present, in the actual application process of plasma arc welding machines for metal products, the metal products are fixedly clamped in the welding area and the plasma arc welding gun is used to weld the metal products. However, if the welding position of the metal product is relatively remote, the metal product cannot be welded by only a fixedly installed welding gun. The use scope of the welding machine is limited, and the applicability of the plasma arc welding machine needs to be improved. Summary of the invention

[0005] The object of the present invention is to provide a plasma arc welding machine for metal products with adjustable welding angle to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: A plasma arc welding machine for metal products with adjustable welding angle, comprising: a base, wherein a cylinder 1 is fixedly installed inside the base;

[0007] A fixing assembly, wherein the fixing assembly is arranged on the top of the base;

[0008] Wherein, the fixing component includes a fixing part and a collecting part, and the fixing part and the collecting part are both arranged on the top of the base;

[0009] An adjustment component, wherein the adjustment component is arranged on the top of the base;

[0010] Wherein, the adjustment component includes an adjustment part and a limit part, and the adjustment part and the limit part are both arranged on the top of the base;

[0011] A welding assembly, wherein the welding assembly is disposed on the top of the base;

[0012] Wherein, the welding assembly includes a moving part and a welding part, and the moving part and the welding part are both arranged on the top of the base.

[0013] Preferably, the fixing part includes a fixing seat, a second cylinder is fixedly installed inside the fixing seat, a fixing plate is fixedly installed at the telescopic end of the second cylinder, a rubber plate is fixedly installed on the left side of the fixing plate, the fixing seat is equidistantly arranged on the top of the base, the telescopic end of the second cylinder penetrates the fixing seat and extends to the outside of the fixing seat; the second cylinder is used to drive the fixing plate and the rubber plate to move, so as to clamp and fix the metal product, thereby achieving the effect of convenient clamping and fixing of the metal product.

[0014] Preferably, the collecting part includes a mesh frame, a collecting bucket is movably installed inside the mesh frame through a snap-fit, a pull ring is fixedly installed on the right side of the collecting bucket, a motor is fixedly installed on the bottom of the mesh frame, a fastener is provided on the top of the base, the mesh frame is arranged on the top of the base, a fixing seat is fixedly installed on the top of the mesh frame, and the mesh frame and the collecting bucket are threadedly installed by fasteners; after welding is completed, the welding slag falls into the collecting bucket through the mesh frame, thereby achieving the effect of facilitating the collection and cleaning of the welding slag.

[0015] Preferably, the adjusting part includes a reduction motor, a rotating shaft is fixedly installed on the output end of the reduction motor, a bottom frame is fixedly installed on one end of the rotating shaft, a bottom frame is movably installed on the top of the base, the reduction motor is arranged on the top of the base, the reduction motor is fixedly installed on the left side of the bottom frame, the rotating shaft is fixedly installed on both sides of the bottom frame, the rotating shaft is movably installed inside the bottom frame, a motor 1 is fixedly installed inside the bottom frame, the bottom frame is movably installed between the bottom frame and the net frame, and the bottom of the bottom frame is fixedly installed with the telescopic end of the cylinder 1; when the reduction motor is started, the rotating shaft and the bottom frame rotate, and the metal product rotates accordingly, and its angle is adjusted. At the same time, the bottom frame is driven to rise by the cylinder 1, and the metal product on the top rises accordingly, thereby achieving the effect of facilitating the angle adjustment of the metal product.

[0016] Preferably, the limiting part includes a ratchet, a clamping rod and a limiting plate are arranged on the top of the base, a spring is fixedly connected to the bottom of the clamping rod, a telescopic rod 1 is arranged at the bottom of the clamping rod, and a support plate is fixedly installed on the top of the telescopic rod 1.

[0017] Preferably, the ratchet is arranged on the top of the base, the ratchet is fixedly installed on the rotating shaft, the ratchet is limitedly installed between the clamping rod, the limit plate and the support plate are fixedly installed on the base frame, one end of the spring is fixedly connected to the support plate, the clamping rod is movably installed between the limit plate, the limit plate is fixedly installed on the support plate, and the telescopic end of the telescopic rod passes through the support plate and extends to the top of the support plate.

[0018] Preferably, the movable part includes a bottom block, a threaded hole is opened inside the bottom block, a column is fixedly installed on the top of the bottom block, a second motor is fixedly installed on one side of the base, a threaded rod is fixedly installed on the output end of the second motor, the bottom block is movably installed inside the base, the threaded hole and the threaded rod are adapted to each other, and the threaded rod is movably installed inside the base; the threaded rod is driven to rotate by the second motor, the bottom block moves inside the base, and the welding gun moves smoothly therewith, thereby achieving the effect of ensuring the welding quality.

[0019] Preferably, the welding part includes a welding gun, a telescopic rod 2 and a fixed frame are provided on the top of the base, a bottom plate is fixedly installed on the bottom of the welding gun, a side rod and an exhaust pipe are provided on the top of the base, an exhaust fan is fixedly connected to one end of the exhaust pipe, an air suction hopper is provided on the right side of the exhaust fan, a support rod is fixedly installed on the bottom of the exhaust fan, the welding gun is arranged on the top of the base, the telescopic rod 2 is fixedly installed inside the fixed frame, the fixed frame is fixedly installed on the top of the column, the bottom plate is fixedly installed to the telescopic end of the telescopic rod 2, the side rod is fixedly installed to the base frame, the side rod is fixedly installed to the support rod by bolts, one end of the exhaust fan is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to the air suction hopper, and the air suction hopper is fixedly installed to the support rod.

[0020] The present invention provides a plasma arc welding machine for metal products with adjustable welding angle. It has the following beneficial effects:

[0021] (1) The present invention provides an adjustment portion. After the metal product to be processed is clamped and fixed, if the welding position is not in the welding area, the reduction motor is started, the bottom frame of the rotating shaft rotates, the angle of the metal product changes, and the cylinder is started at the same time to adjust the height of the metal product so that the metal product and the welding gun are at the same horizontal height. When the motor is started, the bottom frame rotates, and the welding surface of the metal product changes, thereby achieving the effect of facilitating welding of different positions of the metal product.

[0022] (2) The present invention sets a fixed position, places the metal product to be processed on the top of the mesh frame, starts cylinder 2, and moves the fixed plate toward the side of the metal product to contact and fix the metal product. The rubber plate contacts the metal product, increasing the friction between the rubber plate and the metal product, thereby achieving the effect of convenient and stable clamping and fixing of the metal product.

[0023] (3) The present invention sets a collection part, and the collection bucket is installed inside the mesh frame by snapping. The fastener limits the collection bucket. The welding slag produced by welding falls into the collection bucket through the mesh frame. The collection bucket can be cleaned by loosening the fastener and then taking out the collection bucket, thereby achieving the effect of facilitating the collection and cleaning of welding slag during the welding process.

[0024] (4) The present invention sets a limit position. When the telescopic end of the telescopic rod 1 does not conflict with the bottom of the clamping rod, the reduction motor is started, the rotating shaft drives the ratchet to rotate, and at the same time the clamping rod descends in the limit plate and the spring contracts. If the telescopic end of the telescopic rod 1 conflicts with the bottom of the clamping rod, the ratchet will not rotate, thereby preventing the metal product from rotating during the processing and affecting the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a view of the internal structure of the welding machine of the present invention;

[0027] Figure 3 It is a right view of the internal structure of the welding machine of the present invention;

[0028] Figure 4 It is a rear view of the welding machine of the present invention;

[0029] Figure 5 For the present invention Figure 2 A partial enlarged view of middle A;

[0030] Figure 6 For the present invention Figure 4 A magnified partial view of B.

[0031] In the figure: 1 base, 2 cylinder 1, 3 fixing assembly, 31 fixing part, 311 fixing seat, 312 cylinder 2, 313 fixing plate, 314 rubber plate, 32 collecting part, 321 net frame, 322 collecting bucket, 323 pull ring, 324 motor 1, 325 fastener, 4 adjustment assembly, 41 adjustment part, 411 reduction motor, 412 rotating shaft, 413 bottom frame, 414 bottom frame, 42 limiting part, 421 ratchet, 422 clamping rod, 423 limiting plate, 424 spring, 425 telescopic rod 1, 426 support plate, 5 welding assembly, 51 moving part, 511 bottom block, 512 threaded hole, 513 column, 514 motor 2, 515 threaded rod, 52 welding part, 521 welding gun, 522 telescopic rod 2, 523 fixing frame, 524 bottom plate, 525 side rod, 526 exhaust pipe, 527 exhaust fan, 528 suction bucket, 529 support rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example 1

[0036] A preferred embodiment of a plasma arc welding machine for metal products with adjustable welding angle provided by the present invention is as follows: Figure 1-6 As shown: A plasma arc welding machine for metal products with adjustable welding angle, comprising: a base 1, a cylinder 2 is fixedly installed inside the base 1;

[0037] A fixing component 3, the fixing component 3 is arranged on the top of the base 1;

[0038] The fixing assembly 3 includes a fixing portion 31 and a collecting portion 32, and both the fixing portion 31 and the collecting portion 32 are arranged on the top of the base 1;

[0039] The fixing part 31 includes a fixing seat 311, a second cylinder 312 is fixedly installed inside the fixing seat 311, a fixing plate 313 is fixedly installed at the telescopic end of the second cylinder 312, a rubber plate 314 is fixedly installed on the left side of the fixing plate 313, the fixing seat 311 is equidistantly arranged on the top of the base 1, the telescopic end of the second cylinder 312 penetrates the fixing seat 311 and extends to the outside of the fixing seat 311; the metal product to be processed is placed on the top of the mesh frame 321, the second cylinder 312 is started, the fixing plate 313 moves to the side of the metal product to contact and fix the metal product, the rubber plate 314 contacts the metal product, and the friction between the rubber plate 314 and the metal product is increased;

[0040] The collecting part 32 includes a mesh frame 321, and a collecting bucket 322 is installed inside the mesh frame 321 through a snap-fitting movement. A pull ring 323 is fixedly installed on the right side of the collecting bucket 322, and a motor 324 is fixedly installed on the bottom of the mesh frame 321. A fastener 325 is provided on the top of the base 1. The mesh frame 321 is arranged on the top of the base 1, and a fixing seat 311 is fixedly installed on the top of the mesh frame 321. The mesh frame 321 and the collecting bucket 322 are threadedly installed through the fastener 325; the collecting bucket 322 is installed inside the mesh frame 321 through a snap-fitting movement, and the fastener 325 limits the collecting bucket 322. The welding slag generated by welding falls into the collecting bucket 322 through the mesh frame 321, and the inside of the collecting bucket 322 can be cleaned by loosening the fastener 325 and then taking out the collecting bucket 322.

[0041] Example 2

[0042] See also Figure 1-Figure 6 , and on the basis of Example 1, further obtained: an adjustment component 4, the adjustment component 4 is arranged on the top of the base 1;

[0043] The adjusting component 4 includes an adjusting portion 41 and a limiting portion 42, and both the adjusting portion 41 and the limiting portion 42 are arranged on the top of the base 1;

[0044] The adjusting part 41 includes a reduction motor 411, a rotating shaft 412 is fixedly installed at the output end of the reduction motor 411, a bottom frame 413 is fixedly installed at one end of the rotating shaft 412, a bottom frame 414 is movably installed on the top of the base 1, the reduction motor 411 is arranged on the top of the base 1, the reduction motor 411 is fixedly installed on the left side of the bottom frame 414, the rotating shaft 412 is fixedly installed on both sides of the bottom frame 413, the rotating shaft 412 is movably installed inside the bottom frame 414, a motor 324 is fixedly installed inside the bottom frame 413, and the bottom frame 4 13 is movably installed between the net frame 321, and the bottom of the bottom frame 414 is fixedly installed with the telescopic end of the cylinder 2; after the metal product to be processed is clamped and fixed, if the welding position is not in the welding area, the reduction motor 411 is started, the rotating shaft 412 and the bottom frame 413 rotate, and the angle of the metal product changes. At the same time, the cylinder 2 is started to adjust the height of the metal product so that the metal product and the welding gun 521 are at the same horizontal height position, and when the motor 324 is started, the bottom frame 413 rotates, and the welding surface of the metal product changes;

[0045] The limiting part 42 includes a ratchet 421, a clamping rod 422 and a limiting plate 423 are arranged on the top of the base 1, a spring 424 is fixedly connected to the bottom of the clamping rod 422, a telescopic rod 425 is arranged on the bottom of the clamping rod 422, a support plate 426 is fixedly installed on the top of the telescopic rod 425, the ratchet 421 is arranged on the top of the base 1, the ratchet 421 is fixedly installed with the rotating shaft 412, the ratchet 421 and the clamping rod 422 are limitedly installed, the limiting plate 423 and the support plate 426 are fixedly installed with the base frame 414, and one end of the spring 424 is fixed with the support plate 426 The locking rod 422 is movably installed between the limit plate 423, the limit plate 423 and the support plate 426 are fixedly installed, and the telescopic end of the telescopic rod 425 passes through the support plate 426 and extends to the top of the support plate 426; when the telescopic end of the telescopic rod 425 does not conflict with the bottom of the locking rod 422, the reduction motor 411 is started, the rotating shaft 412 will drive the ratchet 421 to rotate, and at the same time the locking rod 422 descends in the limit plate 423, and the spring 424 contracts. If the telescopic end of the telescopic rod 425 conflicts with the bottom of the locking rod 422, the ratchet 421 will not rotate.

[0046] Example 3

[0047] See also Figure 1-Figure 6 , and on the basis of embodiments 1 and 2, further obtained: a welding assembly 5, the welding assembly 5 is arranged on the top of the base 1;

[0048] The welding assembly 5 includes a moving part 51 and a welding part 52, and the moving part 51 and the welding part 52 are both arranged on the top of the base 1;

[0049] The moving part 51 includes a bottom block 511, a threaded hole 512 is provided inside the bottom block 511, a column 513 is fixedly installed on the top of the bottom block 511, a motor 2 514 is fixedly installed on one side of the base 1, a threaded rod 515 is fixedly installed on the output end of the motor 2 514, the bottom block 511 is movably installed inside the base 1, the threaded hole 512 and the threaded rod 515 are adapted, and the threaded rod 515 is movably installed inside the base 1; when the motor 2 514 is started, the threaded rod 515 rotates, the bottom block 511 moves longitudinally inside the base 1, and the column 513 moves accordingly;

[0050] The welding part 52 includes a welding gun 521, a telescopic rod 522 and a fixed frame 523 are arranged on the top of the base 1, a bottom plate 524 is fixedly installed on the bottom of the welding gun 521, a side rod 525 and an exhaust pipe 526 are arranged on the top of the base 1, one end of the exhaust pipe 526 is fixedly connected to an exhaust fan 527, an air suction bucket 528 is arranged on the right side of the exhaust fan 527, a support rod 529 is fixedly installed on the bottom of the exhaust fan 527, the welding gun 521 is arranged on the top of the base 1, the telescopic rod 522 is fixedly installed inside the fixed frame 523, the fixed frame 523 is fixedly installed on the top of the column 513, the bottom plate 524 is fixedly installed on the telescopic end of the telescopic rod 522, the side rod 525 is fixedly installed on the base frame 414, the side rod 525 and the support rod 529 are fixedly installed by bolts, one end of the exhaust fan 527 is fixedly connected to a connecting pipe, and the connecting pipe is fixedly installed on the bottom of the exhaust fan 527. One end of the connecting pipe is fixedly connected to the suction bucket 528, and the suction bucket 528 is fixedly installed on the support rod 529; the movement of the column 513 drives the welding gun 521 to move at the same time, so as to realize automatic welding of metal products. The horizontal distance between the welding gun 521 and the metal product can be adjusted by starting the telescopic rod 522. When the welding gun 521 welds the workpiece, the other end of the exhaust pipe 526 can be connected to a mechanism for treating waste gas, such as a welding fume purifier, and the exhaust fan 527 is started. Under the action of the connecting pipe, the gas generated during welding passes through the suction bucket 528, the connecting pipe, the exhaust fan 527, and the exhaust pipe 526 in turn, and finally enters the welding fume purifier for filtration and purification to prevent the waste gas from spreading to the surroundings. At the same time, the bolts between the side rod 525 and the support rod 529 can be loosened to adjust the position of the suction bucket 528 to achieve a better suction effect.

[0051] When in use, the metal product to be processed is placed on the top of the mesh frame 321, and the cylinder 2 312 is started. The fixing plate 313 moves toward the side of the metal product to contact and fix the metal product. The rubber plate 314 contacts the metal product to increase the friction between the rubber plate 314 and the metal product. After the metal product to be processed is clamped and fixed, if the welding position is not in the welding area, the reduction motor 411 is started, the rotating shaft 412 and the bottom frame 413 rotate, and the angle of the metal product changes. At the same time, the cylinder 2 is started to adjust the height of the metal product. The metal product and the welding gun 521 are at the same horizontal height, and when the motor 1 324 is started, the bottom frame 413 rotates, and the welding surface of the metal product changes. When the telescopic end of the telescopic rod 1 425 does not conflict with the bottom of the clamping rod 422, the reduction motor 411 is started, and the rotating shaft 412 drives the ratchet 421 to rotate. At the same time, the clamping rod 422 descends in the limit plate 423, and the spring 424 contracts. If the telescopic end of the telescopic rod 1 425 conflicts with the bottom of the clamping rod 422, the ratchet 421 will not rotate, and the motor 2 514 is started, and the threaded rod 515 rotates. The bottom block 511 moves longitudinally inside the base 1, and the column 513 moves along with it. The column 513 moves while driving the welding gun 521 to move, thereby realizing automatic welding of metal products. The horizontal distance between the welding gun 521 and the metal product can be adjusted by starting the telescopic rod 2 522. The collecting bucket 322 is installed inside the mesh frame 321 by snapping. The fastener 325 limits the collecting bucket 322. The welding slag generated by welding falls into the collecting bucket 322 through the mesh frame 321. The collecting bucket 322 can be removed by loosening the fastener 325. 322 is cleaned inside. When the welding gun 521 welds the workpiece, the other end of the exhaust pipe 526 can be connected to a mechanism for treating waste gas, such as a welding fume purifier, and the exhaust fan 527 is started. Under the action of the connecting pipe, the gas generated during welding passes through the suction hopper 528, the connecting pipe, the exhaust fan 527, and the exhaust pipe 526 in turn, and finally enters the welding fume purifier for filtration and purification to prevent the waste gas from spreading to the surroundings. At the same time, the bolts between the side rod 525 and the support rod 529 can be loosened to adjust the position of the suction hopper 528 to achieve a better suction effect.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Finally, it should be noted that the above description 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 replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plasma arc welding machine for metal products with adjustable welding angle, characterized in that: The invention comprises: a base (1), wherein a cylinder 1 (2) is fixedly installed inside the base (1); A fixing component (3), wherein the fixing component (3) is arranged on the top of the base (1); The fixing assembly (3) comprises a fixing portion (31) and a collecting portion (32), and the fixing portion (31) and the collecting portion (32) are both arranged on the top of the base (1); An adjustment component (4), wherein the adjustment component (4) is arranged on the top of the base (1); The adjusting component (4) comprises an adjusting portion (41) and a limiting portion (42), and the adjusting portion (41) and the limiting portion (42) are both arranged on the top of the base (1); A welding assembly (5), wherein the welding assembly (5) is arranged on the top of the base (1); The welding assembly (5) comprises a moving part (51) and a welding part (52), and the moving part (51) and the welding part (52) are both arranged on the top of the base (1).

2. The plasma arc welding machine for metal products with adjustable welding angle according to claim 1, characterized in that: The fixing portion (31) comprises a fixing seat (311), a second cylinder (312) is fixedly mounted inside the fixing seat (311), a fixing plate (313) is fixedly mounted on the telescopic end of the second cylinder (312), a rubber plate (314) is fixedly mounted on the left side of the fixing plate (313), the fixing seat (311) is equidistantly arranged on the top of the base (1) in a circumference, and the telescopic end of the second cylinder (312) passes through the fixing seat (311) and extends to the outside of the fixing seat (311).

3. The plasma arc welding machine for metal products with adjustable welding angle according to claim 1, characterized in that: The collecting part (32) comprises a net frame (321), a collecting bucket (322) is movably mounted inside the net frame (321) by means of a snap connection, a pull ring (323) is fixedly mounted on the right side of the collecting bucket (322), a motor 1 (324) is fixedly mounted on the bottom of the net frame (321), a fastener (325) is provided on the top of the base (1), the net frame (321) is arranged on the top of the base (1), a fixing seat (311) is fixedly mounted on the top of the net frame (321), and the net frame (321) and the collecting bucket (322) are threadedly mounted via the fastener (325).

4. The plasma arc welding machine for metal products with adjustable welding angle according to claim 1, characterized in that: The adjustment part (41) comprises a reduction motor (411), a rotating shaft (412) is fixedly mounted on the output end of the reduction motor (411), a bottom frame (413) is fixedly mounted on one end of the rotating shaft (412), and a bottom frame (414) is movably mounted on the top of the base (1).

5. The plasma arc welding machine for metal products with adjustable welding angle according to claim 4, characterized in that: The reduction motor (411) is arranged on the top of the base (1), the reduction motor (411) is fixedly mounted on the left side of the base frame (414), the rotating shaft (412) is fixedly mounted on both sides of the bottom frame (413), the rotating shaft (412) is movably mounted inside the base frame (414), a motor 1 (324) is fixedly mounted inside the bottom frame (413), the bottom frame (413) and the screen frame (321) are movably mounted, and the bottom of the base frame (414) is fixedly mounted to the telescopic end of the cylinder 1 (2).

6. The plasma arc welding machine for metal products with adjustable welding angle according to claim 1, characterized in that: The limiting part (42) includes a ratchet (421), a clamping rod (422) and a limiting plate (423) are arranged on the top of the base (1), a spring (424) is fixedly connected to the bottom of the clamping rod (422), a telescopic rod (425) is arranged on the bottom of the clamping rod (422), and a support plate (426) is fixedly installed on the top of the telescopic rod (425).

7. The plasma arc welding machine for metal products with adjustable welding angle according to claim 6, characterized in that: The ratchet (421) is arranged on the top of the base (1), the ratchet (421) is fixedly installed with the rotating shaft (412), the ratchet (421) is limitedly installed with the clamping rod (422), the limit plate (423) and the support plate (426) are fixedly installed with the base frame (414), one end of the spring (424) is fixedly connected with the support plate (426), the clamping rod (422) is movably installed with the limit plate (423), the limit plate (423) and the support plate (426) are fixedly installed, and the telescopic end of the telescopic rod (425) passes through the support plate (426) and extends to the top of the support plate (426).

8. The plasma arc welding machine for metal products with adjustable welding angle according to claim 1, characterized in that: The movable part (51) comprises a bottom block (511), a threaded hole (512) is provided inside the bottom block (511), a column (513) is fixedly installed on the top of the bottom block (511), a second motor (514) is fixedly installed on one side of the base (1), a threaded rod (515) is fixedly installed on the output end of the second motor (514), the bottom block (511) is movably installed inside the base (1), the threaded hole (512) and the threaded rod (515) are matched, and the threaded rod (515) is movably installed inside the base (1).

9. The plasma arc welding machine for metal products with adjustable welding angle according to claim 1, characterized in that: The welding part (52) includes a welding gun (521), a telescopic rod (522) and a fixing frame (523) are arranged on the top of the base (1), a bottom plate (524) is fixedly installed on the bottom of the welding gun (521), a side rod (525) and an exhaust pipe (526) are arranged on the top of the base (1), one end of the exhaust pipe (526) is fixedly connected to an exhaust fan (527), an air suction hopper (528) is arranged on the right side of the exhaust fan (527), and a support rod (529) is fixedly installed on the bottom of the exhaust fan (527).

10. The plasma arc welding machine for metal products with adjustable welding angle according to claim 9, characterized in that: The welding gun (521) is arranged on the top of the base (1); the second telescopic rod (522) is fixedly installed inside the fixed frame (523); the fixed frame (523) is fixedly installed on the top of the column (513); the bottom plate (524) is fixedly installed on the telescopic end of the second telescopic rod (522); the side rod (525) is fixedly installed on the base frame (414); the side rod (525) and the support rod (529) are fixedly installed by bolts; one end of the exhaust fan (527) is fixedly connected to a connecting pipe; one end of the connecting pipe is fixedly connected to an air suction hopper (528); the air suction hopper (528) and the support rod (529) are fixedly installed.

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