Welding gun nozzle, welding gun wire feeding assembly and welding gun

Abstract

The present invention provides a welding gun nozzle, a welding gun wire feeding assembly and a welding gun. The welding gun nozzle comprises a fixing part and a nozzle part, the fixing part is connected to the nozzle part, a cavity is arranged in the nozzle part, the end of the cavity forms a spray port of the welding gun nozzle, a welding wire introduction through hole is arranged on the fixing part, the welding wire introduction through hole is obliquely arranged relative to the axial direction of the spray port, and the outlet end of the welding wire introduction through hole is close to the spray port of the welding gun nozzle; the wire feeding mechanism can cooperate well with the original welding gun head, thereby improving welding efficiency.

Description

Technical Field

[0001] The invention relates to the field of welding equipment, and in particular to a welding gun nozzle, a welding gun wire feeding assembly and a welding gun. Background Art

[0002] Existing laser welding and argon arc welding guns basically rely on manual wire feeding, or the wire feeding mechanism is relatively complicated, and the wire feeding mechanism and the welding head are not convenient to cooperate, resulting in low welding efficiency. Summary of the invention

[0003] Based on this, it is necessary to provide a welding gun nozzle, a welding gun wire feeding assembly and a welding gun that are convenient to cooperate with a welding head.

[0004] An embodiment of the present invention provides a welding gun nozzle, comprising a fixing part and a nozzle part, wherein the fixing part is connected to the nozzle part, a cavity is arranged inside the nozzle part, and the end of the cavity forms a spray port of the welding gun nozzle, and a welding wire introduction through hole is arranged on the fixing part, wherein the welding wire introduction through hole is obliquely arranged relative to the axial direction of the spray port, and the outlet end of the welding wire introduction through hole is close to the spray port of the welding gun nozzle.

[0005] Preferably, the welding gun nozzle is a ceramic nozzle, and the nozzle portion and the fixing portion are integrally formed.

[0006] Preferably, the angle β between the discharge direction of the welding wire inlet through hole and the central axis of the nozzle is 25-40°.

[0007] Preferably, the cavity includes a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are connected in sequence, the first cavity is cylindrical, the third cavity is cylindrical or frustum-shaped, and the diameter of the first cavity is larger than the diameter of the third cavity, the second cavity gradually shrinks from one end close to the first cavity to one end close to the third cavity, the connection between the first cavity and the second cavity is smoothly set, and the connection between the second cavity and the third cavity is also smoothly set.

[0008] The present invention also provides a welding gun wire feeding assembly, comprising a wire feeder and a welding gun nozzle, the welding gun nozzle comprising a fixing part and a nozzle part, the fixing part is connected to the nozzle part, a cavity is arranged in the nozzle part, and the end of the cavity forms a spray port of the welding gun nozzle, the wire feeder comprises a wire feeder body and a wire feeding tube connected to the wire feeder body, the fixing part of the welding gun nozzle is fixedly connected to the end of the wire feeding tube, a spray port is arranged on the welding gun nozzle, and the end of the wire feeding tube is close to the spray port.

[0009] Preferably, the welding gun wire feeding assembly further comprises a connecting piece, one end of which is fixedly connected to the wire feeder, and the other end of which is used to be fixedly connected to the welding gun.

[0010] Preferably, the wire feeder body comprises a wire feeding mechanism and a connecting tube, one end of the connecting tube is connected to the wire feeding mechanism, and the other end is fixedly connected to the connecting piece, and the wire feeding tube is connected to the connecting tube.

[0011] Preferably, the wire feeding tube passes through the welding wire introduction through hole; or,

[0012] The welding wire inlet through hole includes a first hole body and a second hole body, the first hole body and the second hole body are connected along the axial direction of the first hole body and the second hole body, the wire feeding tube is inserted into the first hole body, the hole diameter of the first hole body is larger than the hole diameter of the second hole body, and the hole diameter of the second hole body is smaller than the maximum outer diameter of the wire feeding tube, for allowing the welding wire to pass through.

[0013] Preferably, the welding gun nozzle is any one of the welding gun nozzles described above.

[0014] Preferably, it further comprises a flow guide tube, and the flow guide tube is detachably connected to the welding gun nozzle.

[0015] The present invention also provides a welding gun, comprising a welding gun head and any one of the welding gun wire feeding assemblies described above, wherein the welding gun nozzle is connected to the front end of the welding gun head, and the welding gun head is a argon arc welding gun head or a laser welding gun head.

[0016] Preferably, the welding gun head comprises an introduction tube, a gun barrel, a flow guide tube and a clamp, the gun barrel is fixedly connected to the flow guide tube, a catheter cavity that is interconnected is formed in the gun barrel and the flow guide tube, the clamp is located in the catheter cavity, a tungsten needle or a laser optical fiber is clamped in the clamp, one end of the introduction tube is located in the catheter cavity and abuts against the clamp, and the other end is located outside the catheter cavity, the welding gun nozzle is detachably fixedly connected to the flow guide tube, and the tungsten needle or laser optical fiber extends from the nozzle of the welding gun nozzle.

[0017] Preferably, the outer wall of the guide tube is provided with a plurality of guide mounting strips, and the inner wall of the welding gun nozzle is provided with guide grooves matching with the guide mounting strips; or,

[0018] The outer wall of the guide tube is provided with a plurality of guide mounting strips, the inner wall of the welding gun nozzle is provided with guide grooves matched with the guide mounting strips, and the length direction of the guide mounting strips is parallel to the axial direction of the welding gun nozzle.

[0019] Preferably, a holding groove is provided on the guide tube, an opening spring is provided in the holding groove, a notch is provided at the inlet end of the welding gun nozzle, the opening spring comprises an arc portion and a bent portion, the arc portion is located in the holding groove and is covered by the welding gun nozzle, the bent portion is located in the notch and applies a force to the side wall of the notch; or,

[0020] A ball ejection device is circumferentially arranged on the outer wall of the guide tube, and a pit matching the corresponding position of the ball ejection device is arranged on the inner wall of the nozzle. After the pit on the inner wall of the nozzle is stuck in the ball ejection device, the ball is ejected and pushed into the pit, thereby fixing the nozzle; or

[0021] The guide tube is provided with an external thread, the welding gun nozzle is provided with an internal thread matching the external thread, and the guide tube is threadedly fixed to the welding gun nozzle.

[0022] Preferably, a protective gas chamber is formed in the gun barrel, the protective gas chamber is connected to the guide tube and the welding gun nozzle, and the guide tube is located between the protective gas chamber and the welding gun nozzle; and / or

[0023] A cooling chamber and a water inlet and a water outlet communicated with the cooling chamber are formed in the gun barrel.

[0024] The welding gun nozzle, welding gun wire feeding assembly and welding gun of the present invention can make the wire feeder and the original welding head cooperate better, thereby improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0026] Figure 1 The overall structure diagram of the welding gun of the preferred embodiment of the present invention;

[0027] Figure 2 A cross-sectional view of a welding gun according to a preferred embodiment of the present invention;

[0028] Figure 3 A cross-sectional view of a welding gun according to another preferred embodiment of the present invention;

[0029] Figure 4 An exploded view of a welding gun according to a preferred embodiment of the present invention;

[0030] Figure 5 for Figure 4 The overall structure diagram of the middle nozzle;

[0031] Figure 6 is a cross-sectional view of the nozzle;

[0032] Figure 7 is a cross-sectional view of another embodiment of a nozzle;

[0033] Figure 8 for Figure 4 The overall structure diagram of the middle guide tube. DETAILED DESCRIPTION

[0034] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0035] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] like Figure 5 to Figure 7 As shown, an embodiment of the present invention provides a welding gun nozzle, including a fixing portion 21 and a nozzle portion 22, wherein the fixing portion 21 is connected to the nozzle portion 22, a cavity 220 is provided in the nozzle portion 22, and the end of the cavity 220 forms a nozzle of the welding gun nozzle, and a welding wire introduction through hole 211 is provided on the fixing portion 21, and the welding wire introduction through hole 211 is obliquely arranged relative to the axial direction of the nozzle, and the nozzle of the welding wire introduction through hole 211 is close to the outlet end of the cavity 220. The fixing portion 21 protrudes from the nozzle portion 22, so as to facilitate the formation of the welding wire introduction through hole 211.

[0038] In a preferred embodiment, the nozzle is a ceramic nozzle, and the nozzle portion 22 and the fixing portion 21 are integrally formed.

[0039] In a preferred embodiment, the angle between the discharge direction of the welding wire inlet through hole 211 and the central axis of the cavity 220 is 25-40°. Specifically, the angle between the discharge direction of the welding wire inlet through hole 211 and the central axis of the cavity 220 is 30°, 40°, 45°, 50° or 60°.

[0040] In a preferred embodiment, the cavity 220 includes a first cavity 221, a second cavity 222, and a third cavity 223. The first cavity 221, the second cavity 222, and the third cavity 223 are connected in sequence. The first cavity 221 and the third cavity 223 are cylindrical, and the diameter of the first cavity 221 is larger than the diameter of the third cavity 223. The second cavity 222 gradually shrinks from the end close to the first cavity 221 to the end close to the third cavity 223. The connection between the first cavity 221 and the second cavity 222 is smoothly arranged, and the connection between the second cavity 222 and the third cavity 223 is also smoothly arranged. In other embodiments, the third cavity 223 may also be in a frustum shape, and the aperture of the end away from the second cavity 222 is smaller than the aperture of the end close to the second cavity 222.

[0041] refer to Figure 6 In a preferred embodiment, a welding wire introduction hole 211 is provided on the fixing portion 21, and the welding wire passes through the wire feeding tube 14. The diameter of the welding wire introduction hole 211 matches the maximum outer diameter of the wire feeding tube 14. The wire feeding tube 14 passes through the welding wire introduction hole 211, and the welding wire 140 also passes through the welding wire introduction hole 211 along with the wire feeding tube 14, and extends from the welding wire introduction hole 211 to the free end of the third cavity and enters the welding arc. Figure 7 In another preferred embodiment, a welding wire introduction through hole 211 is provided on the fixing portion 21, and the welding wire introduction through hole 211 includes a first hole body and a second hole body, the first hole body and the second hole body are connected, and the diameter of the first hole body matches the maximum outer diameter of the wire feeding tube 14, and the diameter of the second hole body is smaller than the maximum outer diameter of the wire feeding tube 14; the wire feeding tube 14 enters the first hole body, and the welding wire 140 enters the first hole body with the wire feeding tube 14, and continues to extend into the second hole body, and extends out from the second hole body to enter the welding arc.

[0042] refer to Figure 1 to Figure 7 The embodiment of the present invention provides a welding gun wire feeding assembly 10, including a wire feeder 1 and a welding gun nozzle 2, the welding gun nozzle 2 including a fixing portion 21 and a nozzle portion 22, the fixing portion 21 and the nozzle portion 22 are connected, a cavity 220 is arranged in the nozzle portion 22, and the end of the cavity 220 forms a spray port of the welding gun nozzle 2, the wire feeder 1 includes a wire feeder body and a wire feeding tube 14 connected to the wire feeder body, the fixing portion 21 of the welding gun nozzle 2 is fixedly connected to the end of the wire feeding tube 14, a spray port is arranged on the welding gun nozzle 2, and the end of the wire feeding tube (i.e., the free end of the wire feeding tube) is close to the spray port. When in use, the welding gun flow guide tube 7 replaces the original welding gun to the fluid, and the welding gun nozzle 2 replaces the original welding gun nozzle 2 on the welding gun head, and can be installed on the original welding gun head for use, without wasting the original welding gun head, and automatic wire feeding is realized. In addition, the end of the wire feeding tube 14 is fixed on the welding gun nozzle 2, so that the welding wire 140 can always be fed into the welding arc ejected from the welding gun head 20 at a certain angle, and the welding effect is good and stable.

[0043] refer to Figure 5 to Figure 7 In a preferred embodiment, the welding gun nozzle 2 further comprises a nozzle portion 22, in which a cavity 220 is arranged, and the cavity 220 comprises a first cavity 221, a second cavity 222 and a third cavity 223, the first cavity 221, the second cavity 222 and the third cavity 223 are connected in sequence, the first cavity 221 and the third cavity 223 are cylindrical, and the diameter of the first cavity 221 is greater than the diameter of the third cavity 223, the second cavity 222 gradually shrinks from one end close to the first cavity 221 to one end close to the third cavity 223, the connection between the first cavity 221 and the second cavity 222 is smoothly arranged, and the connection between the second cavity 222 and the third cavity 223 is also smoothly arranged, so that the shielding gas is less obstructed when it is sprayed out. The first cavity is used to be connected and fixed with the guide tube 7 of the welding gun head 20, and the free end of the third cavity 223 is the outlet end, from which the welding arc and the shielding gas come out.

[0044] refer to Figure 6 In a preferred embodiment, a welding wire introduction hole 211 is provided on the fixing portion 21, and the diameter of the welding wire introduction hole 211 matches the maximum outer diameter of the wire feeding tube 14. The wire feeding tube 14 passes through the welding wire introduction hole 211, and the welding wire 140 also passes through the welding wire introduction hole 211 along with the wire feeding tube 14, and extends from the welding wire introduction hole 211 to the free end of the third cavity 223 and enters the welding arc. Figure 7 In another preferred embodiment, a welding wire introduction through hole 211 is provided on the fixing portion 21, and the welding wire introduction through hole 211 includes a first hole body 2111 and a second hole body 2112, the first hole body 2111 and the second hole body 2112 are connected, and the diameter of the first hole body 2111 matches the maximum outer diameter of the wire feeding tube 14, and the diameter of the second hole body 2112 is smaller than the maximum outer diameter of the wire feeding tube 14; the wire feeding tube 14 enters the first hole body 2111, and the welding wire 140 enters the first hole body 2111 along with the wire feeding tube 14, and continues to extend into the second hole body 2112, and extends out from the second hole body 2112 to enter the welding arc.

[0045] In a preferred embodiment, the welding gun nozzle 2 further includes a nozzle portion 22, which is integrally formed with the fixing portion 21, and has a more stable structure and is easy to manufacture. A cavity 220 is provided in the nozzle portion 22, and a welding wire introduction through hole 211 is provided on the fixing portion 21. The welding wire introduction through hole 211 is obliquely arranged, and the outlet end of the welding wire introduction through hole 211 is close to the outlet end of the cavity 220, so as to facilitate the introduction of the welding wire 140 into the welding arc.

[0046] In a preferred embodiment, the angle between the discharge direction of the welding wire inlet through hole 211 and the central axis of the nozzle is 25-45°. Specifically, the angle between the discharge direction of the welding wire inlet through hole 211 and the central axis of the cavity 220 is 25°, 30°, 40°, or 45°.

[0047] In a preferred embodiment, the welding gun nozzle 2 is a ceramic welding gun nozzle 2. The present invention adopts a ceramic welding gun nozzle 2 because the ceramic welding gun nozzle 2 is non-conductive and does not generate a magnetic field, thereby solving the problem of magnetic blow of the welding arc; and ceramics are resistant to high temperatures and have a low temperature rise, so there is no need to cool them. A welding wire introduction through hole 211 is designed in the ceramic welding gun nozzle 2 to introduce the welding wire 140 into the welding arc, so that this part can be made small, which greatly facilitates the operation of the welding gun in a narrow space.

[0048] In a preferred embodiment, the wire feeder 1 includes a housing 11, a wire feeding mechanism 12 and a connecting tube 13. The housing 11 and the connecting tube 13 are both connected to the wire feeding mechanism 12. The wire feeding tube 14 is connected to the connecting tube 13. The angle between the housing 11 and the connecting tube 13 is 60-120°, preferably 90°. The structure of the wire feeding mechanism 12 can refer to patents such as CN201820018594.2 and CN201420647487.8, which will not be repeated here.

[0049] In a preferred embodiment, the welding gun wire feeding assembly further includes a connecting member 3, one end of which is fixedly connected to the wire feeder 1, and the other end of which is provided with a fixing portion 21 and fixedly connected to the welding gun. Specifically, the other end of the connecting member 3 is fixedly connected to the welding gun head 20 of the welding gun. By fixing the connecting member 3 to the original welding gun head 20, the wire feeder 1 and the welding gun head 20 can be fixed.

[0050] In a preferred embodiment, a guide tube 7 is further included, and the guide tube 7 is detachably connected to the welding gun nozzle 2. A clamping groove 71 is provided on the guide tube 7, and an opening spring 4 is provided in the clamping groove 71. A notch 221 is provided at the inlet end of the welding gun nozzle 2. Specifically, the angle between the side wall of the notch and the bottom wall is 60-85°. The opening spring 4 includes an arc portion and a bending portion. The arc portion is located in the clamping groove 71 and is covered by the welding gun nozzle 2. The bending portion is located in the notch 221 and applies a force to the side wall of the notch 221. During installation, the opening spring 4 is first placed in the clamping groove 71. When installing the welding gun nozzle 2, the direction of the bending portion is adjusted according to the position of the notch 221, and the bending portion is pressed by hand. After the bending portion can be placed in the notch 221, the bending portion is released. The bending portion has an elastic force to restore the original state, and the side wall of the notch 221 can be pressed, thereby playing a role in fixing the welding gun nozzle 2.

[0051] refer to Figure 1 to Figure 7 The present invention also provides a welding gun, including a welding gun head 20 and any one of the welding gun wire feeding components 10 described above, wherein the welding gun nozzle 2 is connected to the front end of the welding gun head, and the welding gun head is an argon arc welding gun head or a laser welding gun head.

[0052] In a preferred embodiment, the welding gun head 20 includes an introduction tube 5, a gun barrel 6, a flow guide tube 7 and a clamp 9. The gun barrel 6 is fixedly connected to the flow guide tube 7. A conduit cavity that is interconnected is formed in the gun barrel 6 and the flow guide tube 7. The clamp 9 is located in the flow guide tube cavity. One end of the introduction tube 5 is located in the conduit cavity and abuts against the clamp, and the other end is located outside the gun barrel. The welding gun nozzle 2 is detachably fixedly connected to the flow guide tube 7, which is convenient for replacing the welding gun nozzle 2 and convenient for maintenance.

[0053] refer to Figure 3 and Figure 8 In a preferred embodiment, the outer wall of the guide tube 7 is provided with a plurality of guide mounting strips 72, and the inner wall of the welding gun nozzle 2 is provided with a guide groove 222 matching with the guide mounting strips 72, so as to facilitate the installation of the welding gun nozzle 2 and fix the welding gun nozzle 2 to prevent it from rotating in the circumferential direction.

[0054] In a preferred embodiment, the outer wall of the guide tube 7 is provided with a plurality of guide mounting strips 72, and the inner wall of the welding gun nozzle 2 is provided with a guide groove 222 matched with the guide mounting strips 72. The length direction of the guide mounting strips 72 is parallel to the axial direction of the welding gun nozzle 2. The plurality of guide mounting strips 72 are evenly distributed, and the radial angle between adjacent guide mounting strips 72 is 60°. Figure 8 In a preferred embodiment, a retaining groove 71 is provided on the guide tube 7, an opening spring 4 is provided in the retaining groove 71, and a notch 221 is provided at the inlet end of the welding gun nozzle 2. Specifically, the angle between the side wall of the notch and the bottom wall is 60-85°. The opening spring 4 includes an arc portion and a bent portion. The arc portion is located in the retaining groove 71 and is covered by the welding gun nozzle 2. The bent portion is located in the notch 221 and applies a force to the side wall of the notch 221. During installation, the opening spring 4 is first placed in the retaining groove 71. When installing the welding gun nozzle 2, the direction of the bent portion is adjusted according to the position of the notch 221, and the bent portion is pressed by hand. After the bent portion can be placed in the notch 221, the bent portion is released. The bent portion has an elastic force to restore the original state, and the side wall of the notch 221 can be pressed, thereby playing a role in fixing the welding gun nozzle 2.

[0055] In a preferred embodiment, the wire feeder 1 includes a shell 11, a wire feeding mechanism 12 and a connecting tube 13. The shell 11 and the connecting tube 13 are both connected to the wire feeding mechanism 12. The wire feeding tube 14 is connected to the connecting tube 13. The angle between the shell 11 and the connecting tube 13 is 60-120°, preferably 90°; it is convenient for the user to hold the shell 11 for welding, which is more convenient to operate.

[0056] In a preferred embodiment, the welding gun further comprises a connecting member 3, one end of which is fixedly connected to the connecting pipe 13, and the other end of which is fixedly connected to the gun barrel 6. By fixing the connecting member 3 to the original welding gun head 20, the wire feeder 1 and the welding gun head 20 can be fixed.

[0057] In a further preferred embodiment, the gun barrel 6 includes a connecting piece 61, a connecting pipe 62 and a cooling water portion 63. The thickness of one end of the connecting piece 3 connected to the connecting pipe 13 is equal to the sum of the thickness of the other end thereof and the thickness of the connecting piece 61. After installation, the effect is more beautiful.

[0058] refer to Figure 3 In a further preferred embodiment, the gun barrel 6 includes a connecting piece 61 and a connecting tube 62. The connecting piece 3 is provided with a mounting hole matched with the introduction tube 5. The introduction tube 5 passes through the mounting hole. The connecting piece 3 is fixed to the conducting piece by bolts. The edge of the connecting piece 3 is matched with the edge of the conducting piece, that is, the edge of the connecting piece 3 is flush with the edge of the conducting piece. After installation, the two look like a whole, which is more beautiful.

[0059] In a further preferred embodiment, a shielding gas chamber 611 is formed in the gun barrel 6, and the shielding gas chamber 611 is connected to the flow guide pipe 7 and the welding gun nozzle 2, and the flow guide pipe 7 is located between the shielding gas chamber 611 and the welding gun nozzle 2. Specifically, one end of the guide pipe 62 of the gun barrel 6 is inserted into the flow guide pipe 7, and the introduction pipe 5 is inserted into the guide pipe, and a shielding gas chamber is formed between the introduction pipe 5 and the guide pipe. A cooling chamber 62 is also formed in the cooling water part 63. A shielding gas conduit 611, a water inlet 612 and a return water conduit are provided on the connecting piece 61. The shielding gas conduit 611 is connected to the shielding gas chamber, and the shielding gas enters the shielding gas chamber 61 through the shielding gas conduit 611, and enters the welding gun nozzle 2 from the shielding gas chamber to prevent oxidation during welding. The cooling water enters the cooling chamber 62 from the water inlet 612, and then comes out from the water outlet 613. After the shielding gas enters the flow guide pipe, it is sprayed out through the welding gun nozzle 2 and surrounded outside the welding arc. During argon welding, electricity is connected through a water-electricity integrated hose and connected to the welding gun body.

[0060] refer to Figure 2 and Figure 3 In the preferred embodiment, a clamp 9 is also provided in the flow guide tube 7. The clamp 9 is a copper tube with high temperature resistance and good electrical conductivity, and the lower section is slotted. After the tungsten needle 100 or the laser optical fiber 200 passes through the clamp 9, the introduction tube 7 is tightened, the bottom end of the introduction tube 7 presses the clamp 9, and the lower part of the clamp 9 is tightened to clamp the tungsten needle 100 or the laser optical fiber 200. A guide pin hole 51 is provided on the introduction tube 5, and the laser optical fiber 200 or the tungsten needle 100 is introduced through the guide pin hole 51. A sealing ring 52 is provided at the lower part of the introduction tube 5, and the sealing effect is better.

[0061] In a preferred embodiment, the welding gun further comprises an insulating sleeve 8 of the barrel 6, and the insulating sleeve 8 is arranged outside the conducting tube 72, so as to provide better safety performance.

[0062] The present invention adopts a ceramic nozzle because the ceramic nozzle is non-conductive and does not generate a magnetic field, thereby solving the problem of magnetic blow in the welding arc. Moreover, ceramics are resistant to high temperatures and their own temperature rise is also very low, so there is no need to cool them. A welding wire introduction through hole 211 is designed in the ceramic nozzle to introduce the welding wire 140 into the welding arc, so that this part can be made small, which greatly facilitates the operation of the welding gun in a narrow space.

[0063] The welding gun wire feeding assembly 10 of the present invention is provided with a welding gun nozzle 2, and the welding gun nozzle 2 replaces the welding gun nozzle 2 of the original welding head, so that the wire feeder 1 can better cooperate with the original welding head, thereby improving the welding efficiency.

[0064] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above embodiments only express the specific implementation methods of the invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the invention, which all belong to the protection scope of the invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A welding gun nozzle, characterized in that: The invention comprises a fixing part and a nozzle part, wherein the fixing part is connected to the nozzle part, a cavity is arranged in the nozzle part, the end of the cavity forms a nozzle of the welding gun nozzle, a welding wire introduction through hole is arranged on the fixing part, the welding wire introduction through hole is arranged obliquely relative to the axial direction of the nozzle, and the outlet end of the welding wire introduction through hole is close to the nozzle of the welding gun nozzle; the cavity comprises a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are connected in sequence, the first cavity is cylindrical, the third cavity is cylindrical or frustum-shaped, and the diameter of the first cavity is larger than the diameter of the third cavity, the second cavity gradually shrinks from one end close to the first cavity to one end close to the third cavity, the connection between the first cavity and the second cavity is smoothly arranged, and the connection between the second cavity and the third cavity is also smoothly arranged.

2. The welding gun nozzle according to claim 1, characterized in that The welding gun nozzle is a ceramic nozzle, and the nozzle part and the fixing part are integrally formed.

3. The welding gun nozzle according to claim 1, characterized in that The angle β between the discharge direction of the welding wire introduction through hole and the central axis of the ejection port is 25-40°.

4. A welding gun wire feeding assembly, characterized in that: It comprises a wire feeder and a welding gun nozzle, wherein the welding gun nozzle is the welding gun nozzle as described in any one of claims 1 to 3, wherein the wire feeder comprises a wire feeder body and a wire feeding tube connected to the wire feeder body, wherein the fixing portion of the welding gun nozzle is fixedly connected to the end of the wire feeding tube, wherein a nozzle is provided on the welding gun nozzle, and the end of the wire feeding tube is close to the nozzle.

5. The welding gun wire feeding assembly according to claim 4, characterized in that: The welding gun wire feeding assembly also includes a connecting piece, one end of which is fixedly connected to the wire feeder, and the other end of which is used to be fixedly connected to the welding gun.

6. The welding gun wire feeding assembly according to claim 5, characterized in that: The wire feeder body comprises a wire feeding mechanism and a connecting tube, one end of the connecting tube is connected to the wire feeding mechanism, and the other end is fixedly connected to the connecting piece, and the wire feeding tube is connected to the connecting tube.

7. The welding gun wire feeding assembly according to claim 4, characterized in that: The fixing portion is provided with a welding wire introduction through hole, and the wire feeding tube passes through the welding wire introduction through hole; or, The fixing portion is provided with a welding wire introduction through hole, and the welding wire introduction through hole includes a first hole body and a second hole body, the first hole body and the second hole body are connected along the axial direction of the first hole body and the second hole body, the wire feeding tube is inserted into the first hole body, the aperture of the first hole body is larger than the aperture of the second hole body, and the aperture of the second hole body is smaller than the maximum outer diameter of the wire feeding tube, for allowing the welding wire to pass through.

8. The welding gun wire feeding assembly according to claim 4, characterized in that: It also includes a flow guide tube, which is detachably connected to the welding gun nozzle.

9. A welding gun, characterized in that: It comprises a welding gun head and a welding gun wire feeding assembly as described in any one of claims 5 to 8, wherein the welding gun nozzle is connected to the front end of the welding gun head, and the welding gun head is a argon arc welding gun head or a laser welding gun head.

10. The welding gun according to claim 9, characterized in that The welding gun head includes an introduction tube, a gun barrel, a flow guide tube and a clamp, the gun barrel is fixedly connected to the flow guide tube, the gun barrel and the flow guide tube form a mutually communicating conduit cavity, the clamp is located in the conduit cavity, a tungsten needle or a laser optical fiber is clamped in the clamp, one end of the introduction tube is located in the conduit cavity and abuts against the clamp, and the other end is located outside the conduit cavity, the welding gun nozzle is detachably fixedly connected to the flow guide tube, and the tungsten needle or the laser optical fiber extends from the nozzle of the welding gun nozzle.

11. The welding gun according to claim 10, characterized in that The outer wall of the guide tube is provided with a plurality of guide mounting strips, and the inner wall of the welding gun nozzle is provided with guide grooves matching with the guide mounting strips; or, The outer wall of the guide tube is provided with a plurality of guide mounting strips, the inner wall of the welding gun nozzle is provided with guide grooves matched with the guide mounting strips, and the length direction of the guide mounting strips is parallel to the axial direction of the welding gun nozzle.

12. The welding gun according to claim 10, characterized in that The guide tube is provided with a holding groove, an opening spring is provided in the holding groove, a notch is provided at the inlet end of the welding gun nozzle, the opening spring comprises an arc portion and a bent portion, the arc portion is located in the holding groove and covered by the welding gun nozzle, the bent portion is located in the notch and applies a force to the side wall of the notch; or, A ball ejection device is circumferentially arranged on the outer wall of the guide tube, and a pit matching the corresponding position of the ball ejection device is arranged on the inner wall of the nozzle. After the pit on the inner wall of the nozzle is stuck in the ball ejection device, the ball is ejected and pushed into the pit, thereby fixing the nozzle; or The guide tube is provided with an external thread, the welding gun nozzle is provided with an internal thread matching the external thread, and the guide tube is threadedly fixed to the welding gun nozzle.

13. The welding gun according to claim 10, characterized in that A protective gas chamber is formed in the gun barrel, the protective gas chamber is connected to the guide tube and the welding gun nozzle, and the guide tube is located between the protective gas chamber and the welding gun nozzle; and / or A cooling chamber and a water inlet and a water outlet communicated with the cooling chamber are formed in the gun barrel.

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