Plasma arc welding gun convenient for replacing electrode

Abstract

The utility model provides a plasma arc welding gun convenient for replacing an electrode. An electrode assembly comprises an electrode holder, an electrode body arranged on the electrode holder and a positioning column arranged on the electrode holder, the first locking assembly comprises a first inner threaded sleeve used for being screwed on the main shaft assembly and a fixing cap used for pressing the electrode holder towards the columnar positioning cavity of the main shaft assembly in an abutting mode. When the electrode assembly is assembled, only the positioning column of the electrode assembly needs to be accommodated and positioned in the columnar positioning cavity, then the first internal thread sleeve is screwed with the second external thread at the second end of the main shaft assembly, and the electrode seat is pressed and fixed at the second end of the main shaft assembly through the fixing cap; therefore, the electrode assembly is rapidly and stably installed on the arc welding gun body through the first locking assembly. When the electrode body is damaged, the electrode assembly can be quickly detached from the second end of the main shaft assembly only by unscrewing the first internal thread sleeve from the main shaft assembly and releasing the pressing and fixing effect of the fixing cap on the electrode seat, so that the electrode assembly can be conveniently and quickly replaced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metal welding technology field, especially, relate to a plasma arc welding torch convenient for replacing electrode. BACKGROUND

[0002] Plasma arc welding torch is widely used in arc welding of metal material, and the plasma arc welding torch usually comprises a torch body, an electrode installed in the torch body, a nozzle with a central outlet hole, a vortex ring sleeve for controlling fluid flow mode and a power supply, etc. At present, since the electrode used by the plasma arc welding torch is a vulnerable component, the plasma arc welding torch has a complex structure and is difficult to disassemble, and when the built-in electrode is damaged, it is usually difficult to conveniently and quickly replace the electrode of the torch head, thereby increasing the use cost of the user. SUMMARY

[0003] Based on the above problems existing in the prior art, the purpose of the embodiments of the utility model is to provide a plasma arc welding torch convenient for replacing electrode, so as to solve the problem that the plasma arc welding torch in the prior art has a complex structure and is difficult to disassemble, and is inconvenient for quick replacement of the electrode.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a plasma arc welding torch convenient for replacing electrode, comprising:

[0005] An arc welding torch body has a cylindrical mounting cavity inside, the front end of the arc welding torch body has a nozzle communicating with the mounting cavity, and the rear end of the arc welding torch body has an internal thread port communicating with the mounting cavity;

[0006] A main shaft assembly is accommodated in the mounting cavity, the first end of the main shaft assembly is provided with a first external thread threadedly matched with the internal thread port, the second end of the main shaft assembly extends to the nozzle, and the second end of the main shaft assembly is provided with a second external thread;

[0007] An electrode assembly is used to generate a plasma arc under low current conditions; and

[0008] A first locking assembly is used to lock the electrode assembly to the second end of the main shaft assembly;

[0009] The electrode assembly comprises an electrode seat, an electrode body arranged on the electrode seat and a positioning column arranged on the electrode seat, the second end of the main shaft assembly is provided with a cylindrical positioning cavity for accommodating and positioning the positioning column, the first locking assembly comprises a first internal thread sleeve for being screwed on the second end of the main shaft assembly and a fixing cap for pressing the electrode seat towards the cylindrical positioning cavity so that the positioning column is accommodated and positioned in the cylindrical positioning cavity, and the fixing cap is provided with a through hole for the electrode body to pass through.

[0010] Further, the electrode seat is disc-shaped, the positioning column is arranged on one side of the electrode seat facing the columnar positioning cavity, and the electrode body is arranged on the other side of the electrode seat away from the columnar positioning cavity; the diameter of the positioning column is smaller than the diameter of the electrode seat, so that a stepped surface for abutting against the second end face of the spindle assembly is formed at the connection between the positioning column and the electrode seat.

[0011] Further, a first sealing groove is arranged on the outer circumferential surface of the positioning column, and a first sealing ring is arranged in the first sealing groove.

[0012] Further, a water cooling cavity is arranged inside the positioning column, the plasma arc welding torch with the electrode convenient to replace further comprises a water inlet pipe in communication with the water cooling cavity, a central pipeline extending along the axial direction is arranged inside the spindle assembly, the water pipe is inserted into the central pipeline, and an annular gap space between the outer wall of the water pipe and the inner wall of the central pipeline constitutes a drainage channel in communication with the water cooling cavity.

[0013] Further, the arc welding torch body comprises a first gun body in the shape of a column, a second gun body in the shape of a column, and a second locking assembly for locking the second gun body on the first gun body, a third external thread is arranged on the outer circumferential surface of the first gun body, the second locking assembly comprises a second internal thread sleeve for being screwed on the first gun body and a locking ring sleeve connected with the second internal thread sleeve, and an annular boss for cooperating with the locking ring sleeve is arranged on the second gun body.

[0014] Further, a first pipeline is arranged inside the first gun body, a second pipeline is arranged inside the second gun body, the first pipeline and the second pipeline are in communication and constitute a columnar mounting cavity extending along the axial direction of the spindle assembly, the spindle assembly comprises a first shaft body inserted into the first pipeline and a second shaft body inserted into the second pipeline, a fourth external thread is arranged on the outer circumferential surface of the first shaft body, a first internal thread is arranged on the inner wall of the first pipeline and matched with the fourth external thread, and a first external thread is arranged on the second shaft body and matched with the internal thread.

[0015] Further, a flared pipe is arranged at one end of the second shaft body close to the first shaft body, the flared pipe is in communication with the central pipeline of the spindle assembly, an insertion pipe for being inserted into the flared pipe is arranged at one end of the first shaft body close to the second shaft body, and the insertion pipe is in communication with the central pipeline of the spindle assembly.

[0016] Further, the mouth of the flared pipe is a tapered flared pipe with gradually increasing caliber, a tapered plug part matched with the tapered flared pipe is formed at the connection between the insertion pipe and the first shaft body, a second sealing groove is arranged on the tapered plug part, and a second sealing ring is arranged on the second sealing groove.

[0017] Further, the arc welding gun body further comprises an insulating protective sleeve detachably sleeved at one end of the first gun body away from the second gun body, a nozzle is formed on the insulating protective sleeve, and the electrode body is at least partially accommodated in the insulating protective sleeve.

[0018] Further, the electrode body is a tungsten electrode.

[0019] Compared with the prior art, the one or more technical solutions in the embodiment of the utility model have at least one of the following beneficial effects:

[0020] The electrode assembly comprises an electrode seat, an electrode body arranged on the electrode seat, and a positioning column arranged on the electrode seat, the first locking assembly comprises a first internal thread sleeve used for being screwed on the second end of the main shaft assembly and a fixing cap used for pressing the electrode seat towards the columnar positioning cavity of the main shaft assembly. When the electrode assembly is assembled, only the positioning column of the electrode assembly needs to be accommodated and positioned in the columnar positioning cavity of the main shaft assembly, and then the first internal thread sleeve is screwed on the second end of the main shaft assembly, and the electrode seat is pressed and fixed on the second end of the main shaft assembly through the fixing cap, so that the electrode assembly is quickly and stably installed on the arc welding gun body through the first locking assembly. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description.

[0022] Figure 1 The utility model provides a three-dimensional structure schematic diagram of the plasma arc welding gun convenient to replace electrode;

[0023] Figure 2 The utility model provides a sectional structure schematic diagram of the plasma arc welding gun convenient to replace electrode;

[0024] Figure 3 The utility model provides a three-dimensional structure schematic diagram of the electrode assembly; Figure 2 The utility model provides a three-dimensional structure schematic diagram of the electrode assembly;

[0025] Figure 4 The utility model provides a three-dimensional structure schematic diagram of the electrode assembly;

[0026] Figure 5 The first locking assembly is provided with a three-dimensional structure schematic view of an embodiment of the utility model;

[0027] Figure 6 The arc welding gun body is provided with an exploded view of an embodiment of the utility model;

[0028] Figure 7 The main shaft assembly is provided with an exploded view of an embodiment of the utility model;

[0029] Figure 8 The plasma arc welding gun is provided with an exploded view of an embodiment of the utility model.

[0030] In the drawings, various reference signs are:

[0031] 1-arc welding gun body; 11-first gun body; 111-third external thread; 12-second gun body; 121-internal thread opening; 122-annular boss; 13-second locking assembly; 131-second internal thread sleeve; 132-locking ring sleeve; 14-insulating protective sleeve;

[0032] 2-main shaft assembly; 21-first shaft body; 211-cylindrical positioning cavity; 212-second external thread; 213-fourth external thread; 22-second shaft body; 221-first external thread; 23-flared tube; 24-insertion pipe; 25-conical flared portion; 26-conical plug portion; 27-second sealing groove; 28-step surface;

[0033] 3-electrode assembly; 31-electrode seat; 32-electrode body; 33-positioning column; 331-first sealing groove;

[0034] 4-first locking assembly; 41-first internal thread sleeve; 42-fixing cap; 421-through hole;

[0035] 5-mounting cavity; 51-first pipeline; 52-second pipeline;

[0036] 6-central pipeline; 61-first passage; 62-second passage;

[0037] 7-nozzle; 8-water cooling cavity; 9-water inlet pipe; 10-drainage passage. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved more clearly understood, the utility model is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0039] It is to be noted that when an element is referred to as being "connected to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] In addition, the terms "first", "second", "third", are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0041] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Throughout the specification, reference to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Therefore, the phrases "in one embodiment", "in some embodiments", or "in some embodiments" appearing in various places throughout the specification are not all referring to the same embodiment. In addition, in one or more embodiments, the specific features, structures, or characteristics can be combined in any suitable manner.

[0044] Please refer to Figures 1 to 8The utility model discloses a plasma arc welding torch convenient to replace electrode provides, and the utility model discloses a plasma arc welding torch convenient to replace electrode includes arc welding torch body 1, main shaft subassembly 2, electrode subassembly 3 and first locking assembly 4, and arc welding torch body 1 has the installation cavity 5 of cylindrical inside, and the front end of arc welding torch body 1 has the spout 7 that communicates with the installation cavity 5, and the rear end of arc welding torch body 1 has the internal thread mouth 121 that communicates with the installation cavity 5. Main shaft subassembly 2 is housed in the installation cavity 5, and the first end of main shaft subassembly 2 is equipped with the first external thread 221 that is screwed with the internal thread mouth 121, and the first end of main shaft subassembly 2 is screwed with the internal thread mouth 121 of arc welding torch body 1 through the first external thread 221, so as to facilitate the assembly and disassembly of main shaft subassembly 2 and arc welding torch body 1. The second end of main shaft subassembly 2 extends to the spout 7, and the second end of main shaft subassembly 2 is equipped with the second external thread 212, and electrode subassembly 3 is used to generate plasma arc under low current condition, and first locking assembly 4 is used to lock electrode subassembly 3 in the second end of main shaft subassembly 2. Wherein, electrode subassembly 3 includes electrode holder 31, electrode body 32 on electrode holder 31 and positioning column 33 on electrode holder 31, and the second end of main shaft subassembly 2 is equipped with the cylindrical positioning cavity 211 that houses and positions positioning column 33. Please further refer to Figure 3 And Figure 5 , first locking assembly 4 includes the first internal thread sleeve 41 for screwing in the second end of main shaft subassembly 2 and the fixed cap 42 for pressing electrode holder 31 towards the cylindrical positioning cavity 211 to make positioning column 33 housed and positioned in the cylindrical positioning cavity 211, and the fixed cap 42 is equipped with the through hole 421 for electrode body 32 to pass through. When assembling electrode subassembly 3, only need to align the positioning column 33 of electrode subassembly 3 and the cylindrical positioning cavity 211 of main shaft subassembly 2, so that the positioning column 33 of electrode subassembly 3 is housed and positioned in the cylindrical positioning cavity 211, then screw the first internal thread sleeve 41 with the second external thread 212 of the second end of main shaft subassembly 2, until the fixed cap 42 presses and fixes electrode holder 31 on the second end of main shaft subassembly 2, at this time, the positioning column 33 of electrode subassembly 3 is housed and positioned in the cylindrical positioning cavity 211, so that electrode subassembly 3 is quickly and stably installed on arc welding torch body 1 through first locking assembly 4, to facilitate the quick assembly of electrode subassembly 3. When electrode body 32 is damaged, only need to unscrew the first internal thread sleeve 41 from the second end of main shaft subassembly 2, the first internal thread sleeve 41 drives the fixed cap 42 to gradually separate from electrode holder 31, until the fixed cap 42 releases the pressing and fixing effect on electrode holder 31, electrode subassembly 3 can be quickly disassembled from the second end of main shaft subassembly 2, so as to facilitate the quick replacement of electrode subassembly 3. It should be noted that the first internal thread sleeve 41 and the fixed cap 42 are integrally formed, and the inner wall of the through hole 421 on the fixed cap 42 is in contact with the outer peripheral surface of electrode body 32, so as to enhance the stability of first locking assembly 4 locking electrode subassembly 3 on arc welding torch body 1.

[0045] The utility model discloses an electrode's plasma arc welding torch convenient to replace provides, and compared with prior art, electrode assembly 3 includes electrode seat 31, be located on electrode seat 31's electrode body 32 and be located on electrode seat 31's positioning column 33, first locking assembly 4 includes for screwing in the first internal thread sleeve 41 of spindle assembly 2 second end and for the fixed cap 42 of electrode seat 31 towards the cylindrical positioning cavity 211 of spindle assembly 2's column resistance pressure, when assembling electrode assembly 3, only need to contain and position electrode assembly 3's positioning column 33 in the cylindrical positioning cavity 211 of spindle assembly 2, again screw the second external thread 212 of spindle assembly 2 second end with first internal thread sleeve 41, through fixed cap 42, electrode seat 31 is pressed and fixed to the second end of spindle assembly 2, so that electrode assembly 3 is quickly and stably installed on arc welding torch body 1 through first locking assembly 4, when electrode body 32 is damaged, only need to screw first internal thread sleeve 41 from the second end of spindle assembly 2, so that fixed cap 42 removes the fixed effect of electrode seat 31 pressure, can electrode assembly 3 from the second end of spindle assembly 2 quickly and disassembled, so as to facilitate the quick replacement of electrode assembly 3.

[0046] Please refer to Figure 2 , Figure 3 and Figure 4 , in some embodiments, electrode seat 31 is discoid, positioning column 33 is located on the side of electrode seat 31 towards cylindrical positioning cavity 211, and electrode body 32 is located on the side of electrode seat 31 away from cylindrical positioning cavity 211. The diameter of positioning column 33 is less than the diameter of electrode seat 31, so as to form a step surface 28 for matching abutting to the end face of the second end of spindle assembly 2 at the connection of positioning column 33 and electrode seat 31. By abutting the step surface 28 to the end face of the second end of spindle assembly 2, the slight position deviation or shaking of electrode seat 31 is prevented, which is beneficial to enhance the stability of first locking assembly 4 locking electrode assembly 3 on arc welding torch body 1.

[0047] Please refer to the drawings Figure 2 and Figure 4 , in some embodiments, in order to enhance the sealing, a first sealing groove 331 is arranged on the outer circumferential surface of positioning column 33, and a first sealing ring is installed in the sealing groove.

[0048] Please refer to Figure 2 and Figure 3In some embodiments, the positioning column 33 is internally provided with a water cooling cavity 8, and the plasma arc welding torch with the electrode replacement function further comprises a water inlet pipe 9 connected to the water cooling cavity 8. The main shaft assembly 2 is internally provided with a center pipe 6 extending in the axial direction, and the water pipe is inserted into the center pipe 6. An annular gap space between the outer wall of the water pipe and the inner wall of the center pipe 6 constitutes a water outlet channel 10, which is connected to the water cooling cavity 8. The cooling water enters the water cooling cavity 8 through the water inlet pipe 9. The cold water in the water cooling cavity 8 absorbs heat from the electrode holder 31 and becomes hot water, which is then discharged through the water outlet channel 10, thereby achieving water cooling and heat dissipation, effectively avoiding damage to the electrode body 32 caused by high temperature, and prolonging the service life of the electrode assembly 3.

[0049] Please refer to Figure 1 、 Figure 2 and Figure 6 In some embodiments, the arc welding torch body 1 comprises a first gun body 11 in the form of a column, a second gun body 12 in the form of a column, and a second locking assembly 13 for locking the second gun body 12 on the first gun body 11. The outer periphery of the first gun body 11 is provided with a third external thread 111. The second locking assembly 13 comprises a second internal thread sleeve 131 for screwing on the first gun body 11 and a locking ring sleeve 132 connected to the second internal thread sleeve 131. The second gun body 12 is provided with an annular boss 122 for cooperating with the locking ring sleeve 132. During assembly, only the second internal thread sleeve 131 is needed to be sleeved on the second gun body 12, so that the locking ring sleeve 132 abuts against the annular boss 122, and then the second internal thread sleeve 131 is screwed on the first gun body 11 until the second internal thread sleeve 131 drives the locking ring sleeve 132 to lock the second gun body 12 on the first gun body 11, thereby achieving quick assembly of the first gun body 11 and the second gun body 12. When it is necessary to repair the internal elements of the arc welding torch body 1, only the second internal thread sleeve 131 needs to be unscrewed from the first gun body 11 until the second internal thread sleeve 131 is separated from the first gun body 11, thereby achieving separation of the first gun body 11 and the second gun body 12, and facilitating disassembly of the first gun body 11 and the second gun body 12 for repairing or replacing the internal electrical elements of the arc welding torch body 1.

[0050] Please refer to Figure 2 and Figure 6In some embodiments, the first gun body 11 is internally provided with a first pipe 51, the second gun body 12 is internally provided with a second pipe 52, the first pipe 51 and the second pipe 52 are communicated to form a cylindrical mounting cavity 5 extending along the axial direction of the spindle assembly 2, the spindle assembly 2 comprises a first shaft body 21 inserted into the first pipe 51 and a second shaft body 22 inserted into the second pipe 52, the outer periphery of the first shaft body 21 is provided with a fourth external thread 213, the inner wall of the first pipe 51 is provided with a first internal thread matched with the fourth external thread 213, and the second shaft body 22 is provided with a first external thread 221 matched with the internal thread 121. The spindle assembly 2 can be quickly disassembled and assembled through the threaded connection, and the installation position of the electrode assembly 3 can be finely adjusted.

[0051] Please refer to Figure 2 , Figure 7 and Figure 8 In some embodiments, the second shaft body 22 is provided with a flared pipe 23 near one end of the first shaft body 21, the flared pipe 23 is communicated with the central pipe 6 of the spindle assembly 2, the first shaft body 21 is provided with a plug-in pipe 24 near one end of the second shaft body 22, the plug-in pipe 24 is communicated with the central pipe 6 of the spindle assembly 2. By aligning the plug-in pipe 24 with the flared pipe 23 and inserting the plug-in pipe 24 into the flared pipe 23, the assembly of the first shaft body 21 and the second shaft body 22 can be conveniently and quickly realized. It should be noted that the first shaft body 21 is internally provided with a first channel 61, the second shaft body 22 is internally provided with a second channel 62, and the first channel 61 and the second channel 62 are communicated to form the central pipe 6 extending along the axial direction of the spindle assembly 2.

[0052] Please refer to Figure 2 and Figure 7 In some embodiments, in order to enhance the sealing performance of the connection between the first shaft body 21 and the second shaft body 22, the mouth of the flared pipe 23 is a tapered flared pipe 25 with gradually increasing caliber, the connection between the plug-in pipe 24 and the first shaft body 21 forms a tapered plug 26 matched with the tapered flared pipe 25, the tapered plug 26 is provided with a second sealing groove 27, and the second sealing groove 27 is provided with a second sealing ring.

[0053] Please refer to Figure 1 , Figure 3 and Figure 8 In some embodiments, the arc welding gun body 1 further comprises an insulating protective sleeve 14 detachably sleeved on one end of the first gun body 11 away from the second gun body 12, the insulating protective sleeve 14 is provided with a nozzle 7, and the electrode body 32 is at least partially accommodated in the insulating protective sleeve 14. It should be noted that the insulating protective sleeve 14 can be but is not limited to a ceramic protective sleeve, and the electrode body 32 can be but is not limited to a tungsten electrode.

[0054] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plasma arc torch facilitating replacement of an electrode, characterized by, The utility model provides a plasma arc welding torch with replaceable electrode, comprising: an arc welding torch body having a cylindrical mounting cavity inside, a spout communicating with the mounting cavity at the front end of the arc welding torch body, and an internally threaded mouth communicating with the mounting cavity at the rear end of the arc welding torch body; a spindle assembly accommodated in the mounting cavity, the first end of the spindle assembly being provided with a first external thread threadedly matched with the internally threaded mouth, the second end of the spindle assembly extending to the spout, and the second end of the spindle assembly being provided with a second external thread; an electrode assembly for generating a plasma arc under low current conditions; and a first locking assembly for locking the electrode assembly to the second end of the spindle assembly; wherein the electrode assembly comprises an electrode seat, an electrode body provided on the electrode seat, and a positioning column provided on the electrode seat, the second end of the spindle assembly is provided with a cylindrical positioning cavity for accommodating and positioning the positioning column, the first locking assembly comprises a first internally threaded sleeve for screwing onto the second end of the spindle assembly and a fixing cap for pressing the electrode seat towards the cylindrical positioning cavity to make the positioning column accommodated and positioned in the cylindrical positioning cavity, and the fixing cap is provided with a through hole for the electrode body to pass through.

2. The plasma arc torch with easy-to-change electrode of claim 1, wherein, The electrode seat is disc-shaped, the positioning column is provided on the side of the electrode seat facing the cylindrical positioning cavity, and the electrode body is provided on the side of the electrode seat away from the cylindrical positioning cavity; the diameter of the positioning column is smaller than the diameter of the electrode seat, so as to form a stepped surface for abutting against the end face of the second end of the spindle assembly at the connection between the positioning column and the electrode seat.

3. The plasma arc torch with easy-to-change electrode of claim 2, wherein, A first sealing groove is provided on the outer peripheral surface of the positioning column, and a first sealing ring is installed in the first sealing groove.

4. The plasma arc torch having an electrode that is easily replaced of claim 2, wherein, The positioning column is internally provided with a water cooling cavity, the plasma arc welding torch with replaceable electrode further comprises a water inlet pipe communicating with the water cooling cavity, the spindle assembly is internally provided with a central pipeline extending in the axial direction, the water pipe is inserted into the central pipeline, and an annular gap space between the outer wall of the water pipe and the inner wall of the central pipeline constitutes a drainage channel, the drainage channel communicates with the water cooling cavity.

5. The plasma arc torch having an electrode that is easily replaced of claim 1, wherein, The arc welding torch body comprises a cylindrical first torch body, a cylindrical second torch body, and a second locking assembly for locking the second torch body on the first torch body, the outer peripheral surface of the first torch body is provided with a third external thread, the second locking assembly comprises a second internally threaded sleeve for screwing onto the first torch body and a locking ring sleeve connected with the second internally threaded sleeve, and the second torch body is provided with an annular boss for matching with the locking ring sleeve.

6. The plasma arc torch having an electrode that is easily replaced of claim 5, wherein, The first torch body is internally provided with a first pipeline, the second torch body is internally provided with a second pipeline, the first pipeline and the second pipeline communicate to constitute a cylindrical mounting cavity extending in the axial direction of the spindle assembly, the spindle assembly comprises a first shaft body inserted into the first pipeline and a second shaft body inserted into the second pipeline, the outer peripheral surface of the first shaft body is provided with a fourth external thread, the inner wall of the first pipeline is provided with a first internal thread matched with the fourth external thread, and the second shaft body is provided with a first external thread threadedly matched with the internally threaded mouth.

7. A plasma arc torch facilitating electrode replacement as recited in claim 6, wherein, The second shaft body is provided with a flared pipe near one end of the first shaft body, the flared pipe is communicated with the central pipe of the main shaft assembly, the first shaft body is provided with an insertion pipe near one end of the second shaft body for matching insertion into the flared pipe, and the insertion pipe is communicated with the central pipe of the main shaft assembly.

8. The plasma arc torch having an electrode that is easily replaced of claim 7, wherein, The mouth of the flared pipe is a tapered flared pipe with gradually increasing caliber, the connection between the insertion pipe and the first shaft body forms a tapered plug part matched with the tapered flared pipe, the tapered plug part is provided with a second sealing groove, and the second sealing groove is provided with a second sealing ring.

9. The plasma arc torch having a replaceable electrode assembly as recited in claim 5, wherein, The arc welding gun body further comprises an insulating protective sleeve detachably sleeved at one end of the first gun body away from the second gun body, a nozzle is formed in the insulating protective sleeve, and the electrode body is at least partially accommodated in the insulating protective sleeve.

10. A plasma arc torch facilitating electrode replacement as recited in any one of claims 1 to 9, wherein, The electrode body is a tungsten electrode.

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