CN218341199U - Water-cooling gun neck for gas shielded arc welding gun - Google Patents

Abstract

The utility model belongs to the technical field of industrial robot welding guns, in particular to a water-cooling gun neck for a gas shielded welding gun, which comprises a wire guide tube, a connecting rod, a conductive nozzle, a protective nozzle, a connecting sleeve, a conductive copper seat, a tube blank and a gun neck water-cooling tube; the utility model discloses an offer into water helicla flute on the pipe embryo surface, go out water helicla flute and annular spread groove, when using, the coolant liquid gets into from the inlet opening and passes through into water helicla flute in proper order, backflow from the apopore behind connector channel and the play water helicla flute, spiral helicine water inlet helical channel and play water helical channel have increased the area of contact of coolant liquid with the rifle neck, the thermal diffusivity to the rifle neck has been improved, the even distribution of heliciform is on the pipe embryo simultaneously, the cooling to the pipe embryo is more even, and then prevented that the local temperature of rifle neck is too high, and then avoid the pipe embryo to warp and influence the welding quality because of the local uneven pipe embryo that causes, the life of rifle neck has been improved.

Description

Water-cooling gun neck for gas shielded arc welding gun

Technical Field

The utility model belongs to the technical field of industrial robot welder, specific water-cooling rifle neck for gas shielded arc welding welder that says so.

Background

The gas shielded welding gun is characterized in that a thick and dense gas protective layer is formed in a welding area by protective gas through a nozzle to isolate air, an electric arc is ignited between an electrode (a tungsten electrode or a welding wire) and a weldment at the same time, and the welded metal and a filler wire are melted by utilizing electric arc heat to connect the welded metal together to obtain a firm welding joint; a large amount of heat can be generated in the welding process, if the heat is not transferred away in time, a welding gun can bear huge high temperature, the welding gun deforms at the high temperature, welding is affected, and meanwhile the service life of the welding gun can be reduced.

The cooling mode of the existing gas shielded welding gun is air cooling and water cooling, the cooling efficiency of the water cooling welding gun is higher than that of the air cooling welding gun, so the water cooling welding gun is usually selected when the welding gun is continuously welded for a long time, the neck of the welding gun is directly connected with the conductive nozzle, a large amount of heat is transferred to the neck, the neck is connected with the conductive nozzle and the conductive copper seat, if the neck is not subjected to heat dissipation, the neck is easily deformed and the like when being in a high-temperature state for a long time, when the existing welding gun is cooled by water, the neck is cooled by arranging a water inlet channel and a water return channel along the axial direction of the neck, the contact surface between the water inlet channel and the water return channel (a cooling circulation channel) arranged along the axial direction and the neck is limited, the local temperature is easily overhigh, and the heat dissipation effect is poor.

SUMMERY OF THE UTILITY MODEL

In order to make up the deficiency of the prior art, the utility model provides a gas shielded arc welds water-cooling rifle neck for welder. The utility model discloses mainly used solves current water-cooling welder's gun neck because the area of contact of coolant liquid and gun neck is little and make its cooling effect poor problem in the cooling process among the cooling circulation passageway.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a water-cooling gun neck for a gas shielded welding gun, which comprises a wire guide pipe, a connecting rod, a conductive nozzle and a protective nozzle; one end of the wire guide pipe is sleeved with the connecting rod; one end of the connecting rod is fixedly connected with the conductive nozzle; the protective nozzle is sleeved outside the conductive nozzle; the gun neck also comprises a connecting sleeve, a conductive copper seat, a tube blank and a gun neck water-cooling tube; the connecting rod is sleeved with the connecting sleeve; the protective nozzle is fixedly connected to the connecting sleeve; the other end of the wire guide pipe is provided with the conductive copper seat; the guide wire pipe is sleeved with the pipe blank; one end of the pipe blank is fixedly connected to the conductive copper seat; the other end of the pipe blank is fixedly connected to the connecting sleeve; the connecting rod is fixedly connected to the pipe blank; the gun neck water-cooling tube is sleeved on the tube blank; one end of the gun neck water-cooling pipe is connected between the connecting sleeve and the pipe blank; a gun neck insulating sleeve is sleeved outside the other end of the gun neck water-cooling pipe; the gun neck insulating sleeve is connected to the conductive copper seat; the locking ring is sleeved outside the gun neck water cooling pipe; the locking ring is connected to the gun neck insulating sleeve; a water inlet spiral groove and a water outlet spiral groove are formed in the outer cylindrical surface of the pipe blank; the water inlet spiral groove and one end of the water outlet spiral groove, which is close to the connecting sleeve, are communicated through an annular connecting groove; the conductive copper seat is provided with a water inlet hole and a water outlet hole; the water inlet hole is communicated with the water inlet spiral groove; the water outlet hole is communicated with the water outlet spiral groove.

When the existing welding gun is cooled by water, the water inlet and return channels are formed along the axial direction of the gun neck, so that the contact surface between the water inlet and return channels formed along the axial direction and the gun neck is limited, and the heat dissipation effect of the welding gun is poor; therefore, the utility model discloses a set up water inlet helicla flute and water outlet helicla flute on the pipe embryo surface, and establish the rifle neck water-cooling pipe at the pipe embryo overcoat, make water inlet helicla flute and water outlet helicla flute form water inlet helical passage and water outlet helical passage, annular spread groove forms the interface channel, water inlet helical passage communicates through the interface channel with the one end of water outlet helical passage, the other end communicates with inlet opening and apopore respectively, when using, coolant liquid gets into from the inlet opening and flows back from the apopore after passing through water inlet helicla flute, interface channel and water outlet helicla flute in proper order, heliciform water inlet helical passage and water outlet helical passage have increased the area of contact of coolant liquid and rifle neck, improve the thermal diffusivity to the rifle neck, simultaneously heliciform even distribution is on the pipe embryo, the cooling to the pipe embryo is more even, and then the local high temperature of rifle neck has been prevented, and then avoid the pipe embryo to cause the pipe embryo to warp because of local heating inequality influence welding, the life of rifle neck has been improved; the gun neck water-cooling pipe is made of the tetrafluoro material, and the tetrafluoro material has the characteristics of high temperature resistance, acid and alkali resistance, resistance to various organic solvents and the like, so that the service life of the gun neck water-cooling pipe is prolonged, and the service life of the gun neck is prolonged.

Preferably, a gap is reserved between the wire guide tube and the tube blank to form a protective gas channel; a ventilation joint is arranged at one end of the wire guide pipe, which is positioned at the conductive copper seat; the air joint is fixedly connected to the wire guide pipe; vent holes are uniformly arranged on the vent joint at intervals along the circumferential direction; the vent hole is communicated with the protective gas channel.

During operation, during the arc welding, need the body of ventilating to protect among the welding process, gas generally can be compressed into and store in intraductal use after the liquid, in-process using, liquid gas becomes the gaseous state and needs the heat absorption, consequently, the gaseous gas temperature that becomes the gaseous state is lower, gas gets into the branch gas vent of connecting rod behind the protection gas channel through the air vent and gets rid of, get rid of the welding and protect from the wire outlet end of conductive nozzle under the blocking of protection nozzle, gas is direct protects welding department through passing through from the gun neck, make the simple compact structure of ventilating, convenient to operate and use, lower gas of while temperature contacts with the gun neck inner wall when the protection gas channel, can take away the partial heat on the pipe parison, and then protect the gun neck, can keep apart pipe parison and seal wire simultaneously, avoid heat on the pipe parison to transmit to the seal wire pipe, avoid seal wire pipe deformation to influence the guide welding wire.

As a first preferred scheme of the utility model, a gap of 0.2-0.4mm is left between the gun neck water-cooling tube and the tube blank.

When the cooling device works, the heat of the pipe blank between the screw pitches of the water inlet spiral channel and the water outlet spiral channel can be transferred to the surfaces of the water inlet spiral channel and the water outlet spiral channel only through self heat transfer and then transferred to the cooling liquid, so that the heat dissipation efficiency is reduced; therefore, by arranging the gap between the gun neck water-cooling pipe and the pipe blank, when cooling liquid enters the water inlet spiral channel from the water inlet hole, part of the cooling liquid enters the surface of the pipe blank between the screw pitches from the gap between the gun neck water-cooling pipe and the pipe blank to form a cooling liquid film, because the gap between the gun neck water-cooling pipe and the pipe blank is 0.2-0.4mm, the gap amount is small, and the resistance of the cooling liquid relative to a circulating channel is large, the cooling liquid mainly flows in the circulating channel (the channel formed by the water inlet hole, the water inlet spiral channel, the connecting channel, the water outlet circulating channel and the water outlet hole), only part of the cooling liquid passes through the gap, so that the cooling liquid is uniformly distributed on the surface of the pipe blank while the circulating cooling is ensured, the heat on the pipe blank can be absorbed more uniformly, the heat dissipation effect on the pipe blank is increased, and the heat dissipation efficiency on the pipe blank is improved.

Preferably, the spiral notch of the water inlet spiral groove is rounded.

The during operation, carry out the radius angle through the spiral notch with the helicla flute of intaking and handle, and then lead through the fillet to the coolant liquid that gets into clearance between rifle neck water-cooling pipe and the pipe embryo, the hindrance in clearance between coolant liquid entering rifle neck water-cooling pipe and the pipe embryo has been reduced, be favorable to improving the coolant liquid clearance flow rate between rifle neck water-cooling pipe and pipe embryo, and then improved the radiating rate to the pipe embryo between water helicla flute and the helicla flute pitch of intaking, the radiating effect to the pipe embryo has been increased, the radiating efficiency to the pipe embryo has been improved, the life of rifle neck has been improved.

Preferably, the inner wall of the gun neck water cooling pipe is uniformly provided with supporting bulges at intervals along the circumferential direction; the length direction of the supporting bulge is parallel to the axis of the gun neck water-cooling tube; the height of the supporting protrusion is equal to the gap distance between the gun neck water-cooling pipe and the pipe blank.

When the gun neck water-cooling tube is in work, the gun neck water-cooling tube is sleeved on the tube blank, and a gap is reserved between the gun neck water-cooling tube and the tube blank, so that the gun neck water-cooling tube and the tube blank are difficult to ensure to be coaxial, the uniformity of the gap is difficult to ensure, and the heat dissipation uniformity of the tube blank is difficult to ensure; consequently, through setting up the support arch along the even interval of circumferencial direction on the inner wall of the gun neck water-cooling pipe, because the clearance distance between the bellied height of support and neck water-cooling pipe and the pipe embryo equals, and then support protruding and the contact of pipe embryo outer wall, and then support the gun neck water-cooling pipe, and then make coaxially between gun neck water-cooling pipe and the pipe embryo, and then guaranteed the homogeneity in clearance between gun neck water-cooling pipe and the pipe embryo, and then guaranteed that the pipe embryo evenly dispels the heat, the life of pipe embryo has been improved, the life of gun neck has been improved.

As a second preferred scheme of the utility model, a strip-shaped dent with the depth of 0.2-0.4mm is broached on the inner wall of the gun neck water cooling pipe or the outer wall of the pipe blank along the axial direction; the strip-shaped dents are uniformly arranged at intervals along the circumferential direction.

When the cooling device works, strip-shaped dents with the depth of 0.2-0.4mm are formed in the inner wall of the gun neck water cooling pipe or the outer wall of the pipe blank in a broaching mode along the axial direction (because two ends of the pipe blank are connected with the connecting sleeve and the conductive copper seat and need to be sealed, the strip-shaped grooves in the surface of the pipe blank cannot be pulled through), one part of cooling liquid entering the water inlet spiral channel can flow to the water outlet spiral groove through the strip-shaped grooves, the cooling liquid mainly flows in a circulating mode through the circulating channel, the area between the cooling liquid and the pipe blank is increased, the cooling effect of the cooling liquid on the pipe blank is further improved, and the cooling efficiency is improved.

Preferably, a groove of 0.5-0.8mm is axially broached on the inner wall of the pipe blank; the grooves are uniformly arranged at intervals along the circumferential direction.

When the pipe blank cooling device works, the inner wall of the pipe blank is axially broached to form the groove, so that the contact area between gas and the pipe blank when the gas passes through the protective gas channel is increased, the heat dissipation of the pipe blank is further improved, the service life of the pipe blank is further prolonged, and the service life of a gun neck is prolonged; the straight groove processing is carried out on the slender cylindrical surface, and the broaching mode is adopted for processing, so that the processing is convenient and the one-step forming is realized.

Preferably, the outer wall of the wire guide pipe is spirally wound with a guide strip; the guide strip is made of tetrafluoro material.

When the gun neck is in work, the guide groove is wound on the outer wall of the yarn guide pipe, and then when the yarn guide pipe passes through the pipe blank, the guide strip is contacted with the inner wall of the pipe blank, so that the protective gas channel is straight and becomes spiral, the retention time of gas in the protective gas channel is prolonged, the contact time of the gas and the inner wall of the pipe blank is prolonged, the heat dissipation effect on the pipe blank is further improved, the service life of the pipe blank is further prolonged, and the service life of the gun neck is prolonged; as the PTFE material has the characteristics of high temperature resistance and the like, the service life of the flow guide strip is prolonged.

The utility model has the advantages as follows:

1. the utility model discloses in through seting up into water helicla flute and play water helicla flute on the pipe embryo surface, and establish the gun neck water-cooling tube at the pipe embryo overcoat, make into water helicla flute and play water helicla flute and form into water inlet helical passage and play water helical passage, annular spread groove forms connecting channel, water inlet helical passage communicates through connecting channel with the one end of play water helical passage, the other end communicates with inlet opening and apopore respectively, when using, coolant liquid gets into from the inlet opening and flows back from the apopore after passing through water inlet helical flute, connecting channel and play water helicla flute in proper order, spiral heliciform water inlet helical passage and play water helical passage have increased the area of contact of coolant liquid and gun neck, the heat dissipation to the gun neck has been improved, spiral heliciform even geminate transistors distributes on the pipe embryo simultaneously, the cooling of pipe embryo is more even, and then the local high temperature of gun neck has been prevented, and then avoid the pipe embryo to cause the pipe deformation because of local heating inequality to influence because of the local heating inequality, the life of gun neck has been improved; the gun neck water-cooling pipe is made of the tetrafluoro material, and the tetrafluoro material has the characteristics of high temperature resistance, acid and alkali resistance, resistance to various organic solvents and the like, so that the service life of the gun neck water-cooling pipe is prolonged, and the service life of the gun neck is prolonged.

2. The utility model discloses during well arc-welding, need the body of ventilating to protect among the welding process, gas generally can be compressed into and store in intraductal use after the liquid state, in-process using, liquid gas becomes the gaseous state and needs the heat absorption, consequently, the gaseous temperature that becomes the gaseous state is lower, gas gets into the branch gas vent from the connecting rod after the protection gas passage through the air vent and gets rid of, the wire outlet end of chewing from electrically conducting under the blocking of protection is chewed and is got rid of and protect the welding, gas is direct protects welding department through the butt welding from the neck, make ventilation structure simple and compact, convenient operation and use, simultaneously lower gas of temperature contact with the neck inner wall when the protection gas passage, can take away the partial heat on the pipe blank, and then protect the neck, can keep apart pipe blank and seal wire pipe simultaneously, avoid heat transfer on the pipe blank to the seal wire pipe, avoid seal wire pipe deformation to influence the guide welding wire.

3. The utility model discloses in through set up the clearance between gun neck water-cooling pipe and pipe embryo, when the coolant liquid from the inlet opening get into in the back spiral channel that intakes, partial coolant liquid gets into the pipe embryo surface between the pitch from between the clearance between gun neck water-cooling pipe and the pipe embryo, form one deck cooling liquid film, because clearance between gun neck water-cooling pipe and the pipe embryo is 0.2-0.4mm, the clearance volume is less, the circulation channel resistance of relative coolant liquid is big, therefore the coolant liquid mainly is in circulation channel (the inlet opening, intake spiral channel, connecting channel, the passageway that goes out water circulation channel and delivery port form), only part passes through from the clearance, and then when having guaranteed circulative cooling, make the embryo surface all have the coolant liquid, heat on the absorption tube embryo that can be more even, the radiating effect to the pipe embryo has been increased, the radiating efficiency to the pipe embryo has been improved.

4. The utility model discloses in carry out the radius angle through the spiral notch with the helicla flute of intaking and handle, and then lead through the fillet to the coolant liquid that gets into clearance between rifle neck water-cooling pipe and the pipe embryo, the hindrance in clearance between coolant liquid entering rifle neck water-cooling pipe and the pipe embryo has been reduced, be favorable to improving the coolant liquid clearance flow rate between rifle neck water-cooling pipe and pipe embryo, and then improved the radiating rate to the pipe embryo between the helicla flute of intaking and the helicla flute pitch of going out water, the radiating effect to the pipe embryo has been increased, the radiating efficiency to the pipe embryo has been improved, the life of rifle neck has been improved.

5. The utility model discloses in set up the support arch through along the even interval of circumferencial direction on the gun neck water-cooled tube inner wall, because the clearance distance between the bellied height of support and neck water-cooled tube and the pipe embryo equals, and then support protruding and the contact of pipe embryo outer wall, and then support the gun neck water-cooled tube, and then make coaxially between gun neck water-cooled tube and the pipe embryo, and then guaranteed the homogeneity in clearance between gun neck water-cooled tube and the pipe embryo, and then guaranteed that the pipe embryo evenly dispels the heat, the life of pipe embryo has been improved, the life of gun neck has been improved.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of a middle water-cooled gun neck according to the present invention;

FIG. 2 is a schematic view of the internal structure of the middle water-cooled gun neck of the present invention;

FIG. 3 is a schematic cross-sectional view of a middle water-cooled gun neck according to the present invention;

FIG. 4 is a schematic view of a first embodiment of a middle water-cooled gun neck according to the present invention;

FIG. 5 is a schematic cross-sectional view of a first embodiment of a middle water-cooled pistol neck in accordance with the present invention;

FIG. 6 is a schematic view of a second embodiment of a middle water-cooled pistol neck according to the present invention;

FIG. 7 is a schematic view of a tube blank according to a second embodiment of the middle water-cooled gun neck of the present invention;

in the figure: the gun neck water-cooling pipe comprises a wire guide pipe 11, a connecting rod 12, a conductive nozzle 13, a protective nozzle 14, a connecting sleeve 2, a conductive copper seat 3, a water inlet hole 31, a water outlet hole 32, a pipe blank 4, a water inlet spiral groove 41, a fillet 410, a water outlet spiral groove 42, an annular connecting groove 43, a groove 44, a gun neck water-cooling pipe 5, a supporting protrusion 51, a gun neck insulating sleeve 6, a protective air channel 7, an air vent joint 8, an air vent hole 81, a strip-shaped dent 9 and a flow guide strip 91.

Detailed Description

In order to make the utility model realize the technical means, creation characteristics, achievement purpose and efficiency are easy to understand and understand, the utility model is further explained by combining the detailed implementation mode.

As shown in fig. 1 to 3, a water-cooled neck for a gas shielded arc welding gun includes a wire guide tube 11, a connecting rod 12, a conductive tip 13, and a protective tip 14; one end of the wire guide tube 11 is sleeved with the connecting rod 12; one end of the connecting rod 12 is fixedly connected with the conductive nozzle 13; the protective nozzle 14 is sleeved outside the conductive nozzle 13; the gun neck further comprises a connecting sleeve 2, a conductive copper seat 3, a tube blank 4 and a gun neck water-cooling tube 5; the connecting sleeve 2 is sleeved outside the connecting rod 12; the protective nozzle 14 is fixedly connected to the connecting sleeve 2; the other end of the wire guide tube 11 is provided with the conductive copper seat 3; the tube blank 4 is sleeved outside the wire guide tube 11; one end of the pipe blank 4 is fixedly connected to the conductive copper seat 3; the other end of the pipe blank 4 is fixedly connected to the connecting sleeve 2; the connecting rod 12 is fixedly connected to the pipe blank 4; the gun neck water-cooling tube 5 is sleeved on the tube blank 4; one end of the gun neck water-cooling pipe 5 is connected between the connecting sleeve 2 and the pipe blank 4; a gun neck insulating sleeve 6 is sleeved outside the other end of the gun neck water-cooling tube 5; the gun neck insulating sleeve 6 is connected to the conductive copper seat 3; the locking ring is sleeved outside the gun neck water-cooling pipe 5; the locking ring is connected to the gun neck insulating sleeve 6; a water inlet spiral groove 41 and a water outlet spiral groove 42 are formed in the outer cylindrical surface of the pipe blank 4; the water inlet spiral groove 41 and the water outlet spiral groove 42 are communicated through an annular connecting groove 43 at one end close to the connecting sleeve 2; the conductive copper seat 3 is provided with a water inlet hole 31 and a water outlet hole 32; the water inlet hole 31 is communicated with the water inlet spiral groove 41; the water outlet hole 32 is communicated with the water outlet spiral groove 42.

When the existing welding gun is cooled by water, the water inlet and return channels are formed along the axial direction of the gun neck, so that the contact surface between the water inlet and return channels formed along the axial direction and the gun neck is limited, and the heat dissipation effect of the welding gun is poor; therefore, the utility model discloses a set up into water helicla flute 41 and play water helicla flute 42 on the surface of pipe embryo 4, and set up gun neck water-cooling tube 5 outside pipe embryo 4, make into water helicla flute 41 and play water helicla flute 42 form into water inlet spiral passage and play water helical passage, annular spread groove 43 forms the interface channel, water inlet spiral passage and the one end of play water helical passage are passed through the interface channel and are communicated, the other end communicates with inlet opening 31 and apopore 32 respectively, when using, coolant liquid gets into from inlet opening 31 and flows back from apopore 32 after passing through water helicla flute 41, interface channel and play water helicla flute 42 in proper order, spiral water inlet spiral passage and play water helical passage have increased the area of contact of coolant liquid and gun neck, improve the heat dissipation to the gun neck, spiral even distribution is on pipe embryo 4 simultaneously, the cooling to pipe embryo 4 is more even, and then the local high temperature of gun neck has been prevented, and then avoid pipe embryo 4 to cause pipe embryo 4 to warp and influence welding quality because of local inequality, the life of gun neck has been improved; the gun neck water-cooling pipe 5 is made of a tetrafluoro material, and the tetrafluoro material has the characteristics of high temperature resistance, acid and alkali resistance, resistance to various organic solvents and the like, so that the service life of the gun neck cold water pipe is prolonged, and the service life of the gun neck is prolonged.

As shown in fig. 1 to 3, a gap is left between the guide wire tube 11 and the tube blank 4 to form a shielding gas channel 7; one end of the wire guide tube 11, which is positioned at the conductive copper seat 3, is provided with a ventilation joint 8; the air joint 8 is fixedly connected to the wire guide pipe 11; the vent joints 8 are provided with vent holes 81 at even intervals along the circumferential direction; the vent hole 81 communicates with the shielding gas passage 7.

When the gas welding device works, during arc welding, the gas to be ventilated is protected in the welding process, the gas is generally compressed into liquid and then stored in a pipe for use, in the use process, the liquid gas is changed into gas state and needs to absorb heat, so that the temperature of the gas changed into gas state is lower, the gas enters the protective gas channel 7 through the vent hole 81 and then is discharged from the gas distributing hole of the connecting rod 12, the gas is discharged from the wire outlet end of the conductive nozzle 13 under the blocking of the protective nozzle 14 to protect welding, the gas is directly protected from a gun neck through the welding position, the ventilation structure is simple and compact, the gas is convenient to operate and use, meanwhile, the gas with lower temperature is in contact with the inner wall of the gun neck when passing through the protective gas channel 7, the upper part of the pipe blank 4 can be taken away, the gun neck is protected, meanwhile, the pipe blank 4 can be isolated from the wire guide pipe 11, the heat on the pipe blank 4 is prevented from being transferred onto the wire guide pipe 11, and the influence of the deformation of the welding wire caused by the deformation of the wire guide pipe 11 is avoided.

The first embodiment is as follows:

as shown in figures 4 and 5, a gap of 0.2-0.4mm is left between the gun neck water-cooling tube 5 and the tube blank 4.

When the cooling device works, the heat of the pipe blank 4 between the screw pitches of the water inlet spiral channel and the water outlet spiral channel can be transferred to the surfaces of the water inlet spiral groove 41 and the water outlet spiral groove 42 only through self heat transfer and then transferred to the cooling liquid, so that the heat dissipation efficiency is reduced; therefore, by arranging the gap between the gun neck water-cooling tube 5 and the tube blank 4, when cooling liquid enters the rear water-cooling spiral channel from the water inlet hole 31, part of the cooling liquid enters the surface of the tube blank 4 between the screw pitches from the gap between the gun neck water-cooling tube 5 and the tube blank 4 to form a layer of cooling liquid film, because the gap between the gun neck water-cooling tube 5 and the tube blank 4 is 0.2-0.4mm, the gap amount is small, and the resistance of the circulation channel relative to the cooling liquid is large, the cooling liquid mainly flows in the circulation channel (the channel formed by the water inlet hole 31, the water inlet spiral channel, the connecting channel, the water outlet circulation channel and the water outlet hole 32), only part of the cooling liquid passes through the gap, so that the cooling liquid is contained on the surface of the blank while the circulation cooling is ensured, the heat on the tube blank 4 can be more uniformly absorbed, the heat dissipation effect on the tube blank 4 is increased, and the heat dissipation efficiency on the tube blank 4 is improved.

As shown in fig. 5, the spiral notch of the water inlet spiral groove 41 is rounded 410.

During operation, carry out radius 410 through the spiral notch that will intake spiral groove 41 and handle, and then lead to the coolant liquid that gets into clearance between gun neck water-cooled tube 5 and the pipe embryo 4 through fillet 410, the hindrance in clearance between coolant liquid entering gun neck water-cooled tube 5 and the pipe embryo 4 has been reduced, be favorable to improving the coolant liquid clearance flow rate between gun neck water-cooled tube 5 and pipe embryo 4, and then improved the radiating rate to the pipe embryo 4 between spiral groove 41 and the water spiral groove 42 pitch of intaking, the radiating effect to pipe embryo 4 has been increased, the radiating efficiency to pipe embryo 4 has been improved, the life of the gun neck has been improved.

As shown in fig. 5, the inner wall of the gun neck water-cooling pipe 5 is provided with supporting protrusions 51 at regular intervals along the circumferential direction; the length direction of the supporting protrusion 51 is parallel to the axis of the gun neck water-cooling tube 5; the height of the supporting protrusion 51 is equal to the gap distance between the gun neck water-cooling tube 5 and the tube blank 4.

When the gun neck water-cooling tube 5 works, the gun neck water-cooling tube 5 is sleeved on the tube blank 4, and a gap is reserved between the gun neck water-cooling tube 5 and the tube blank 4, so that the gun neck water-cooling tube 5 and the tube blank 4 are difficult to be coaxial, the uniformity of the gap is difficult to be ensured, and the heat dissipation uniformity of the tube blank 4 is difficult to be ensured; consequently, through setting up support protrusion 51 along the even interval of circumferencial direction on 5 inner walls of rifle neck water-cooled tube, because support protrusion 51's height equals with the clearance distance between neck water-cooled tube and the pipe embryo 4, and then support protrusion 51 and the contact of pipe embryo 4 outer wall, and then support rifle neck water-cooled tube 5, and then make between rifle neck water-cooled tube 5 and the pipe embryo 4 coaxial, and then guaranteed the homogeneity in clearance between rifle neck water-cooled tube 5 and the pipe embryo 4, and then guaranteed that pipe embryo 4 evenly dispels the heat, the life of pipe embryo 4 has been improved, the life of rifle neck has been improved.

The second embodiment:

as shown in fig. 6 and 7, a strip-shaped dent 9 with the depth of 0.2-0.4mm is broached on the inner wall of the gun neck water-cooling pipe 5 or the outer wall of the pipe blank 4 along the axial direction; the strip-shaped dents 9 are uniformly spaced along the circumferential direction.

When the cooling device works, strip-shaped dents 9 with the depth of 0.2-0.4mm are formed in the inner wall of the gun neck water-cooling pipe 5 or the outer wall of the pipe blank 4 in a broaching mode along the axial direction (two ends of the pipe blank 4 are connected with the connecting sleeve 2 and the conductive copper seat 3 and need to be sealed, so that the strip-shaped grooves on the surface of the pipe blank 4 cannot be pulled through), one part of cooling liquid entering the water inlet spiral channel can flow to the water outlet spiral groove through the strip-shaped grooves, the cooling liquid mainly flows in a circulating mode through the circulating channel, the area between the cooling liquid and the pipe blank 4 is increased, the cooling effect of the cooling liquid on the pipe blank 4 is further improved, and the cooling efficiency is improved (in the figure 6, the condition that the strip-shaped dents 9 are formed in the inner wall of the gun neck water-cooling pipe 5, and the condition that the strip-shaped dents 9 are formed in the outer wall of the pipe blank 4 is in the figure 6).

As shown in fig. 3, 5 and 6, the inner wall of the tube blank 4 is axially broached to form a groove 44 of 0.5-0.8 mm; the grooves 44 are arranged at regular intervals in the circumferential direction.

When the pipe blank heat dissipation device works, the grooves 44 are axially broached on the inner wall of the pipe blank 4, so that the contact area between gas and the pipe blank 4 when the gas passes through the protective gas channel 7 is increased, the heat dissipation of the pipe blank 4 is further improved, the service life of the pipe blank 4 is further prolonged, and the service life of a gun neck is prolonged; the straight groove processing is carried out on the slender cylindrical surface, and the broaching mode is adopted for processing, so that the processing is convenient and the one-step forming is realized.

As shown in fig. 1 to 6, a guide strip 91 is spirally wound on the outer wall of the guide wire tube 11; the guide strip 91 is made of tetrafluoro material.

When the gun neck cooling device works, the diversion grooves are wound on the outer wall of the yarn guide pipe 11, and when the yarn guide pipe 11 penetrates through the pipe blank 4, the diversion strips 91 are in contact with the inner wall of the pipe blank 4, so that the protective gas channel 7 is changed into a spiral shape, the retention time of gas in the protective gas channel 7 is prolonged, the contact time of the gas and the inner wall of the pipe blank 4 is prolonged, the heat dissipation effect on the pipe blank 4 is further improved, the service life of the pipe blank 4 is further prolonged, and the service life of the gun neck is prolonged; the PTFE material has the characteristics of high temperature resistance and the like, so that the service life of the guide strip 91 is prolonged.

When the welding gun is in use, cooling liquid enters the water inlet spiral groove 41, the connecting channel and the water outlet spiral groove 42 from the water inlet hole 31 and then flows back from the water outlet hole 32, the spiral water inlet spiral channel and the spiral water outlet spiral channel increase the contact area of the cooling liquid and the gun neck, the heat dissipation performance of the gun neck is improved, meanwhile, the spiral shape is uniformly distributed on the pipe blank 4, the cooling of the pipe blank 4 is more uniform, the local over-high temperature of the gun neck is prevented, the pipe blank 4 is prevented from deforming due to the fact that the pipe blank 4 is not uniformly heated, the welding quality is prevented from being influenced, and the service life of the gun neck is prolonged; the gun neck water-cooling pipe 5 is made of a tetrafluoro material, and the tetrafluoro material has the characteristics of high temperature resistance, acid and alkali resistance, resistance to various organic solvents and the like, so that the service life of the gun neck cold water pipe is prolonged, and the service life of the gun neck is prolonged.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (8)

1. A water-cooling gun neck for a gas shielded welding gun comprises a wire guide tube (11), a connecting rod (12), a conductive nozzle (13) and a protective nozzle (14); one end of the wire guide tube (11) is sleeved with the connecting rod (12); one end of the connecting rod (12) is fixedly connected with the conductive nozzle (13); the conductive nozzle (13) is sleeved with the protective nozzle (14); the method is characterized in that: the device also comprises a connecting sleeve (2), a conductive copper seat (3), a tube blank (4) and a gun neck water-cooling tube (5); the connecting sleeve (2) is sleeved outside the connecting rod (12); the protective nozzle (14) is fixedly connected to the connecting sleeve (2); the other end of the wire guide tube (11) is provided with the conductive copper seat (3); the tube blank (4) is sleeved outside the wire guide tube (11); one end of the pipe blank (4) is fixedly connected to the conductive copper seat (3); the other end of the pipe blank (4) is fixedly connected to the connecting sleeve (2); the connecting rod (12) is fixedly connected to the pipe blank (4); the gun neck water-cooling pipe (5) is sleeved on the pipe blank (4); one end of the gun neck water-cooling tube (5) is connected between the connecting sleeve (2) and the tube blank (4); a gun neck insulating sleeve (6) is sleeved outside the other end of the gun neck water-cooling pipe (5); the gun neck insulating sleeve (6) is connected to the conductive copper seat (3); a locking ring is sleeved outside the gun neck water-cooling pipe (5); the locking ring is connected to the gun neck insulating sleeve (6); a water inlet spiral groove (41) and a water outlet spiral groove (42) are formed in the outer cylindrical surface of the pipe blank (4); the water inlet spiral groove (41) is communicated with one end, close to the connecting sleeve (2), of the water outlet spiral groove (42) through an annular connecting groove (43); a water inlet hole (31) and a water outlet hole (32) are formed in the conductive copper seat (3); the water inlet hole (31) is communicated with the water inlet spiral groove (41); the water outlet hole (32) is communicated with the water outlet spiral groove (42).

2. The water-cooled neck for a gas shielded welding gun according to claim 1, characterized in that: a gap is reserved between the wire guide tube (11) and the tube blank (4) to form a protective gas channel (7); a ventilation joint (8) is arranged at one end, located on the conductive copper seat (3), of the wire guide pipe (11); the air joint (8) is fixedly connected to the wire guide pipe (11); vent holes (81) are uniformly arranged on the vent joint (8) at intervals along the circumferential direction; the vent hole (81) is communicated with the protective gas channel (7).

3. The water-cooled neck for a gas shielded welding gun according to claim 2, characterized in that: a gap of 0.2-0.4mm is reserved between the gun neck water-cooling tube (5) and the tube blank (4).

4. The water-cooled neck for a gas shielded welding gun according to claim 3, wherein: and the spiral notch of the water inlet spiral groove (41) is subjected to rounding (410).

5. The water-cooled neck for a gas shielded welding gun according to claim 4, wherein: the inner wall of the gun neck water-cooling pipe (5) is uniformly provided with supporting bulges (51) at intervals along the circumferential direction; the length direction of the supporting bulge (51) is parallel to the axis of the gun neck water-cooling tube (5); the height of the supporting protrusion (51) is equal to the gap distance between the gun neck water-cooling tube (5) and the tube blank (4).

6. The water-cooled neck for a gas shielded welding gun according to claim 2, characterized in that: strip-shaped dents (9) with the depth of 0.2-0.4mm are broached on the inner wall of the gun neck water-cooling pipe (5) or the outer wall of the pipe blank (4) along the axial direction; the strip-shaped dents (9) are uniformly arranged at intervals along the circumferential direction.

7. The water-cooled neck for a gas shielded welding torch according to claim 5 or 6, wherein: a groove (44) with the thickness of 0.5-0.8mm is axially broached on the inner wall of the pipe blank (4); the grooves (44) are arranged at regular intervals in the circumferential direction.

8. The water-cooled gun neck for the gas shielded welding gun according to claim 7, wherein: the outer wall of the wire guide pipe (11) is spirally wound with a diversion strip (91); the flow guide strip (91) is made of a tetrafluoro material.

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