CN105537743A - Micro-plasma arc welding gun - Google Patents
Micro-plasma arc welding gun Download PDFInfo
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- CN105537743A CN105537743A CN201610098412.2A CN201610098412A CN105537743A CN 105537743 A CN105537743 A CN 105537743A CN 201610098412 A CN201610098412 A CN 201610098412A CN 105537743 A CN105537743 A CN 105537743A
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- gun body
- upper cutting
- gun
- protection gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/027—Welding for purposes other than joining, e.g. build-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Plasma Technology (AREA)
Abstract
The invention discloses a micro-plasma arc welding gun which comprises a tungsten electrode press head, a sealing ring, a tungsten electrode clamp, an upper gun body, an insulator, a lower gun body, a centering support pillar, a centering sleeve, a gun mouth, a protecting gas cap, a tungsten electrode and a handle. The micro-plasma arc welding gun disclosed by the invention has the following beneficial effects that the upper gun body and the lower gun body are high in heat conduction efficiency; due to an optimally designed lower gun body cooling water channel, the heat conduction travel is reduced, and the cooling effect of the gun mouth is improved; the tungsten electrode clamp, the centering support pillar and the centering sleeve can ensure that the tungsten electrode is coaxial with the gun mouth; on the premise that advantages such as small plasma diameter and high energy density are maintained for the gun mouth, the stiffness of the plasma arc can be reduced, low current overlaying under 50 amperes can be achieved, and the sizes of thin-wall components made of materials such as titanium alloy and nickel base alloy can be recovered through overlaying. In addition, the micro-plasma arc welding gun is compact in structure, so that the accessibility of the welding gun in working is improved.
Description
Technical field
The invention belongs to arc welding equipment technical field, especially relate to a kind of micro-plasma arc welding rifle.
Background technology
The edge of the sheet parts of the rare metal such as titanium alloy, nickel-base alloy manufacture is adopted in use often to there will be damage; except damage location; appearance and size, the mechanical property at all the other positions are all uninfluenced; in this case; if part entirety scrapped and will cause significant wastage, Whole Equipment operating cost is caused to raise.
The sheet parts appearance and size of the materials such as current titanium alloy, nickel-base alloy is recovered main and is adopted argon tungsten-arc welding heap postwelding shaping processing method, the arc energy density adopted due to argon tungsten arc process is large compared with low, angle of flare, therefore produces the problems such as welding heat affected zone is comparatively large, welding joint mechanical property is poor.Due to micro-plasma arc welding connect that technique adopts plasma arc diameter is less than 1.5mm, energy density is large, angle of flare is little, become the first-selected technique that built-up welding is carried out in alternative argon tungsten-arc welding, but, the plasma arc deflection that the micro-plasma arc welding rifle of current suitability for industrialized production produces is high, plasma arc pressure large, strong to the stirring action in molten bath, therefore the appearance of weld that formed of built-up welding is poor; The special plasma (welding) torch rifle nozzle aperture footpath of built-up welding is generally greater than 3mm, and bonding power is large, easily causes mother metal to subside when carrying out built-up welding to sheet parts because weld heat input is too high, and heap pad width is excessive, adds the workload that follow-up shaping is processed.
Therefore; design one can retain that plasma arc diameter is little, energy density advantages of higher; plasma arc pressure can be reduced again, molten bath gas shielded is effective, micro-plasma arc welding rifle that welding gun overall dimensions is little, the sheet parts manufactured for rare metals such as Bead weld repair titanium alloy, nickel-base alloys is significant.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of micro-plasma arc welding rifle that can be used for Bead weld repair.
In order to achieve the above object, micro-plasma arc welding rifle provided by the invention comprises: tungsten electrode pressure head, sealing ring, tungsten electrode folder, upper cutting gun, insulator, lower gun body, centering fore-set, centering collar, rifle mouth, protection gas cap, tungsten electrode and handle; Wherein upper cutting gun is made up of upper cutting gun endosome and upper cutting gun ectosome, and upper cutting gun endosome is cylindrical, and there is centre bore at axle center place, and the external diameter on middle part and top is greater than lower outer diameter; Upper cutting gun ectosome is circular, be enclosed within middle part and the lower external of upper cutting gun endosome, a C font upper cutting gun cooling water channel is formed between the bottom of upper cutting gun endosome and upper cutting gun ectosome, the 5th joint upper cutting gun ectosome installed the 2nd joint be connected with upper cutting gun cooling water channel one end and is connected with the upper cutting gun cooling water channel other end, the 2nd joint installs first joint be connected with upper cutting gun endosome centre bore with on the upper cutting gun ectosome on the upside of the 5th joint and upper cutting gun endosome; Lower gun body is made up of lower gun body water channel sealing ring, lower gun body endosome 2, protection gas screen pack, lower gun body ectosome and protection gas circuit outer wall; There is centre bore at the axle center place of described lower gun body endosome, and lower gun body ectosome is enclosed within the outside of lower gun body endosome; Lower gun body water channel sealing ring is connected between the upper end inner peripheral surface of lower gun body ectosome and the upper end outer circumferential face of lower gun body endosome; Lower gun body cooling water channel is formed, the 6th joint that lower gun body ectosome top is installed the 3rd joint be connected with lower gun body cooling water channel one end and is connected with the lower gun body cooling water channel other end between lower gun body ectosome and lower gun body endosome; Protection gas circuit outer wall is enclosed within the outside of lower gun body ectosome, and upper end to be fixed in the middle part of lower gun body ectosome on outer circumference surface; Protection gas screen pack to be arranged in the middle part of protection gas circuit outer wall in the middle part of inner peripheral surface and lower gun body ectosome between outer circumference surface, space between protection gas circuit outer wall and lower gun body ectosome is protection gas passage, and the 4th joint be connected with protection gas channel upper is installed on protection gas circuit outer wall top; Insulator is annular, and be arranged between upper cutting gun and lower gun body, upper cutting gun, insulator and lower gun body are coated with thermosetting resin hot pressing layer, forms Welding gun main body structure.
There is a centre bore middle and lower part of tungsten electrode pressure head, and centre bore lower inner diameter is greater than upper inner diameter, and form shoulder at reducing place thus, the top of tungsten electrode pressure head bottom and upper cutting gun endosome is threaded connection; Sealing ring is located between tungsten electrode pressure head lower outer circumferential face and upper cutting gun endosome top inner peripheral surface.
Centering collar is arranged in the centre bore on upper cutting gun endosome bottom, insulator and lower gun body endosome top, and upper inner diameter is greater than lower inner diameter; Centering fore-set is tubulose, is arranged on centering collar upper interior portion; Tungsten electrode folder is tubulose, and bottom is inserted in centering collar upper interior portion, and lower end contacts with the upper port of centering fore-set, and upper surface contacts with the shoulder on tungsten electrode pressure head; The top of rifle mouth and the bottom of lower gun body endosome are threaded connection; Protection gas cap is enclosed within outside rifle mouth, and top is threaded connection with protection gas circuit outer wall bottom; Tungsten electrode is inserted in the centre bore of tungsten electrode pressure head, tungsten electrode folder, centering fore-set, centering collar, lower gun body endosome and rifle mouth from top to bottom.
Handle is arranged on the outside side of thermosetting resin hot pressing layer; inside establish ion-gas air inlet pipe, upper cutting gun water inlet pipe, upper cutting gun outlet pipe, lower gun body water inlet pipe, lower gun body outlet pipe and protection gas air inlet pipe; wherein the inner of ion-gas air inlet pipe is connected with the 1st joint; the inner of upper cutting gun water inlet pipe is connected with the 2nd joint; the inner of upper cutting gun outlet pipe is connected with the 5th joint; the inner of lower gun body water inlet pipe is connected with the 3rd joint; the inner of lower gun body outlet pipe is connected with the 6th joint, and the inner of protection gas air inlet pipe is connected with the 4th joint.
Described micro-plasma arc welding rifle also comprises a sealing ring be arranged between thermosetting resin hot pressing layer lower end and protection gas cap upper end.
Described rifle mouth adopts the convergence type design of monotrysian type circular cone band cylindrical section, and top is the air inlet section with cylindrical center bore, is rectification section on the downside of air inlet section, and the center-hole diameter of rectification section is less than the center-hole diameter of air inlet section; Be compression section on the downside of rectification section, the centre bore of compression section is conical; Be ejection section on the downside of compression section, the center-hole diameter of ejection section equals the basal diameter of compression section.
Describedly have the rectification section of rifle mouth, mode that the junction of compression section and ejection section adopts circular arc excessive, avoid gas flow to occur eddy current when junction.
The upper end outer dia of described tungsten electrode folder is greater than middle part and bottom external diameter, and middle and lower part and bottom are symmetrically distributed with the open seam that many width are 0.5mm vertically; Outside, bottom is pyramidal structure, and the upper port of the centering fore-set corresponding with the lower port of bottom is conical.
The top of described lower gun body cooling water channel is that C font cooling water enters aquaporin and cooling water exhalant canal, wherein cooling water is entered aquaporin and is connected with lower gun body water inlet pipe by the 3rd joint, cooling water exhalant canal is connected with lower gun body outlet pipe by the 6th joint, middle part is for entering water interface channel and water outlet interface channel, bottom is an annular water-cooled space, and cooling water enters aquaporin and is connected with annular water-cooled space with water outlet interface channel respectively by entering water interface channel with cooling water exhalant canal.
The annular space formed between the outer surface top of described lower gun body ectosome, the inner surface top of protection gas circuit outer wall and protection gas screen pack is protection air chamber, and this protection air chamber is connected with protection gas air inlet pipe the inner by the 4th joint; Multiple protection gas exit passageway symmetrical is vertically formed between the outer surface bottom of lower gun body ectosome, the inner surface bottom of protection gas circuit outer wall and protection gas screen pack.
Micro-plasma arc welding rifle provided by the invention has following beneficial effect: upper cutting gun and lower gun body heat transfer efficiency high, the lower gun body cooling water channel of optimal design decreases heat conduction stroke, improves the cooling effect of rifle mouth; Tungsten electrode folder, centering fore-set and centering collar can ensure tungsten electrode and rifle mouth coaxial; Rifle mouth can retaining that plasma arc diameter is little, under the prerequisite of energy density advantages of higher, reduce the deflection of plasma arc, make it to can be implemented in less than 50 amperes small area analysis built-up welding, recover the thin-walled parts appearance and size of the material such as titanium alloy, nickel-base alloy in order to built-up welding.In addition, this welding gun structure is compact, therefore improves accessibility during welding gun work.
Accompanying drawing explanation
Fig. 1 is micro-plasma arc welding rifle vertical structure sectional view provided by the invention.
Fig. 2 (a) is agent structure sectional view in the micro-plasma arc welding rifle shown in Fig. 1.
Fig. 2 (b) is for A-A in Fig. 2 (a) is to sectional view.
Fig. 2 (c) is for B-B in Fig. 2 (a) is to sectional view.
Fig. 3 (a) is upper cutting gun structure sectional view in the micro-plasma arc welding rifle shown in Fig. 1.
Fig. 3 (b) is for C-C in Fig. 3 (a) is to sectional view.
Fig. 4 (a) is lower gun body structure sectional view in the micro-plasma arc welding rifle shown in Fig. 1.
Fig. 4 (b) is for D-D in Fig. 4 (a) is to sectional view.
Fig. 5 is gun mouth structure sectional view in the micro-plasma arc welding rifle shown in Fig. 1.
Fig. 6 is tungsten electrode clamping and positioning device STRUCTURE DECOMPOSITION schematic diagram in the micro-plasma arc welding rifle shown in Fig. 1.
Fig. 7 (a) is water-cooling system schematic diagram in the micro-plasma arc welding rifle shown in Fig. 1.
Fig. 7 (b) is for A-A in Fig. 7 (a) is to sectional view.
Fig. 7 (c) is for B-B in Fig. 7 (a) is to sectional view.
Fig. 7 (d) is for C-C in Fig. 7 (a) is to sectional view.
Fig. 8 (a) is molten bath protection gas circuit schematic diagram in the micro-plasma arc welding rifle shown in Fig. 1.
Fig. 8 (b) is for A-A in Fig. 8 (a) is to sectional view.
Fig. 8 (c) is for B-B in Fig. 8 (a) is to sectional view.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, micro-plasma arc welding rifle provided by the invention is described in detail.
As Figure 1-Figure 8, micro-plasma arc welding rifle provided by the invention comprises: tungsten electrode pressure head 1, sealing ring 2, tungsten electrode folder 3, upper cutting gun 4, insulator 5, lower gun body 6, centering fore-set 7, centering collar 8, rifle mouth 10, protection gas cap 11, tungsten electrode 12 and handle 17; Wherein upper cutting gun 4 is made up of upper cutting gun endosome 4-1 and upper cutting gun ectosome 4-2, and upper cutting gun endosome 4-1 is cylindrical, and there is centre bore at axle center place, and the external diameter on middle part and top is greater than lower outer diameter; Upper cutting gun ectosome 4-2 is circular, be enclosed within middle part and the lower external of upper cutting gun endosome 4-1, a C font upper cutting gun cooling water channel C4-1 is formed between the bottom of upper cutting gun endosome 4-1 and upper cutting gun ectosome 4-2, the first joint G1 that on the 2nd joint G2 that on upper cutting gun ectosome 4-2, installation one is connected with upper cutting gun cooling water channel C4-1 one end and the 5th joint G5 be connected with the upper cutting gun cooling water channel C4-1 other end, the 2nd joint G2 and the upper cutting gun ectosome 4-2 on the upside of the 5th joint G5 and upper cutting gun endosome 4-1, installation one is connected with upper cutting gun endosome 4-1 centre bore; Lower gun body 6 is made up of lower gun body water channel sealing ring 6-1, lower gun body endosome 6-2, protection gas screen pack 6-3, lower gun body ectosome 6-4 and protection gas circuit outer wall 6-5; There is centre bore at the axle center place of described lower gun body endosome 6-2, and lower gun body ectosome 6-4 is enclosed within the outside of lower gun body endosome 6-2; Lower gun body water channel sealing ring 6-1 is connected between the upper end inner peripheral surface of lower gun body ectosome 6-4 and the upper end outer circumferential face of lower gun body endosome 6-2; Lower gun body cooling water channel is formed, the 6th joint G6 that lower gun body ectosome 6-4 installs on top a 3rd joint G3 be connected with lower gun body cooling water channel one end and is connected with the lower gun body cooling water channel other end between lower gun body ectosome 6-4 and lower gun body endosome 6-2; Protection gas circuit outer wall 6-5 is enclosed within the outside of lower gun body ectosome 6-4, and upper end to be fixed in the middle part of lower gun body ectosome 6-4 on outer circumference surface; Protection gas screen pack 6-3 to be arranged in the middle part of protection gas circuit outer wall 6-5 in the middle part of inner peripheral surface and lower gun body ectosome 6-4 between outer circumference surface, space between protection gas circuit outer wall 6-5 and lower gun body ectosome 6-4 is protection gas passage, and a 4th joint G4 be connected with protection gas channel upper is installed on protection gas circuit outer wall 6-5 top; Insulator 5 is annular, and be arranged between upper cutting gun 4 and lower gun body 6, upper cutting gun 4, insulator 5 and lower gun body 6 are coated with thermosetting resin hot pressing layer, forms Welding gun main body structure;
There is a centre bore middle and lower part of tungsten electrode pressure head 1, and centre bore lower inner diameter is greater than upper inner diameter, and form shoulder 1-1 at reducing place thus, the top of tungsten electrode pressure head 1 bottom and upper cutting gun endosome 4-1 is threaded connection; Sealing ring 2 is located between tungsten electrode pressure head 1 lower outer circumferential face and upper cutting gun endosome 4-1 top inner peripheral surface;
Centering collar 8 is arranged in the centre bore on upper cutting gun endosome 4-1 bottom, insulator 5 and lower gun body endosome 6-2 top, and upper inner diameter is greater than lower inner diameter; Centering fore-set 7 is tubulose, is arranged on centering collar 8 upper interior portion; Tungsten electrode folder 3 is tubulose, and bottom is inserted in centering collar 8 upper interior portion, and lower end contacts with the upper port of centering fore-set 7, and upper surface contacts with the shoulder 1-1 on tungsten electrode pressure head 1; The top of rifle mouth 10 and the bottom of lower gun body endosome 6-2 are threaded connection; Protection gas cap 11 is enclosed within outside rifle mouth 10, and top is threaded connection with protection gas circuit outer wall 6-5 bottom; Tungsten electrode 12 is inserted in the centre bore of tungsten electrode pressure head 1, tungsten electrode folder 3, centering fore-set 7, centering collar 8, lower gun body endosome 6-2 and rifle mouth 10 from top to bottom;
Handle 17 is arranged on the outside side of thermosetting resin hot pressing layer, inside establish ion-gas air inlet pipe 13, upper cutting gun water inlet pipe 14, upper cutting gun outlet pipe 14 ＇, lower gun body water inlet pipe 15, lower gun body outlet pipe 15 ＇ and protection gas air inlet pipe 16, wherein the inner of ion-gas air inlet pipe 13 is connected with the 1st joint G1, the inner of upper cutting gun water inlet pipe 14 is connected with the 2nd joint G2, the inner of upper cutting gun outlet pipe 14 ＇ is connected with the 5th joint G5, the inner of lower gun body water inlet pipe 15 is connected with the 3rd joint G3, the inner of lower gun body outlet pipe 15 ＇ is connected with the 6th joint G6, the inner of protection gas air inlet pipe 16 is connected with the 4th joint G4.
Described micro-plasma arc welding rifle also comprises a sealing ring 9 be arranged between thermosetting resin hot pressing layer lower end and protection gas cap 11 upper end.
Described rifle mouth 10 adopts the convergence type of monotrysian type circular cone band cylindrical section to design, top is the air inlet section L10-1 with cylindrical center bore, be that the center-hole diameter of rectification section L10-2, rectification section L10-2 is less than the center-hole diameter of air inlet section L10-1 on the downside of air inlet section L10-1; Be the centre bore of compression section L10-3, compression section L10-3 on the downside of rectification section L10-2 be conical; Be ejection section L10-4 on the downside of the L10-3 of compression section, the center-hole diameter spraying section L10-4 equals the basal diameter of compression section L10-3.
The mode that rectification section L10-2, the compression section L10-3 of described rifle mouth 10 and the junction of ejection section L10-4 adopt circular arc excessive, avoids gas flow to occur eddy current when junction.
The upper end L3-1 outer dia of described tungsten electrode folder 3 is greater than middle part and bottom L3-2 external diameter, and middle and lower part and bottom L3-2 are symmetrically distributed with the open seam that many width are 0.5mm vertically; L3-2 outside in bottom is pyramidal structure, and the upper port L7-1 of the centering fore-set 7 corresponding with the lower port of bottom L3-2 is conical.
The top of described lower gun body cooling water channel is that C font cooling water enters aquaporin C6-1 and cooling water exhalant canal C6-3, wherein cooling water is entered aquaporin C6-1 and is connected with lower gun body water inlet pipe 15 by the 3rd joint G3, cooling water exhalant canal C6-3 is connected with lower gun body outlet pipe 15 ＇ by the 6th joint G6, middle part is for entering water interface channel C6-2 and water outlet interface channel C6-4, bottom is an annular water-cooled space C6-5, cooling water enters aquaporin C6-1 and is connected with annular water-cooled space C6-5 with water outlet interface channel C6-4 respectively by entering water interface channel C6-2 with cooling water exhalant canal C6-3.
The annular space formed between the outer surface top of described lower gun body ectosome 6-4, the inner surface top of protection gas circuit outer wall 6-5 and protection gas screen pack 6-3 is protection air chamber G6-1, and this protection air chamber G6-1 is connected with protection gas air inlet pipe 16 the inner by the 4th joint G4; Multiple protection gas exit passageway G6-2 symmetrical is vertically formed between the outer surface bottom of lower gun body ectosome 6-4, the inner surface bottom of protection gas circuit outer wall 6-5 and protection gas screen pack 6-3.
Now micro-plasma arc welding rifle operation principle provided by the invention is described below: before use, be first connected with power cathode by tungsten electrode 12, rifle mouth 10 is connected with positive source respectively with weldment.In use, rifle mouth 10 is aimed on sheet parts and treats surfacing part, cooling water is passed into upper cutting gun cooling water channel C4-1 by upper cutting gun water inlet pipe 14 and the 2nd joint G2 simultaneously, discharge through the 5th joint G5 and upper cutting gun outlet pipe 14 ＇ after completing heat exchange, thus upper cutting gun 4 is cooled; Cooling water is passed into cooling water by lower gun body water inlet pipe 15 and the 3rd joint G3 to be entered in aquaporin C6-1, flow into into water interface channel C6-2 and annular water-cooled space C6-5 successively downwards, complete heat exchange backward on flow into water outlet interface channel C6-4 and cooling water exhalant canal C6-3 successively, discharge finally by the 6th joint G6 and lower gun body outlet pipe 15 ＇, thus lower gun body 6 is cooled; Simultaneously, protective gas is passed in protection air chamber G6-1 by protection gas air inlet pipe the 16 and the 4th joint G4, then after protection gas screen pack 6-3 filters, flow into protection gas exit passageway G6-2, finally discharge from the lower ending opening of protection gas cap 11, form molten bath protective atmosphere during welding; Meanwhile, plasma gas is passed into the inside of upper cutting gun endosome 4-1 and tungsten electrode pressure head 1 by ion-gas air inlet pipe 13 and the 1st joint G1, then press from both sides many open seam on 3 middle and lower parts and bottom L3-3 and tungsten electrode folder 3, centering fore-set 7 along tungsten electrode, that gap between centering collar 8 and tungsten electrode 12 flows into lower gun body 6 is inner, enter rifle mouth 10 afterwards; This plasma gas enters the further rectification of rectification section L10-2 after air inlet section L10-1 carries out preliminary rectification, enters ejection section L10-4 when flowing through compression section L10-3 after being subject to mechanical compress; Plasma gas is when flowing through compression section L10-3 end and ejection section L10-4, be subject to transferred arc twice ionization between the most advanced and sophisticated and sheet parts of the untransferable arc between the most advanced and sophisticated and rifle mouth 10 of tungsten electrode 12, tungsten electrode 12, violent mechanical compress and magnetic compression effect is subject at ejection section L10-4, finally generate the plasma air-flow of high energy and high speed and spray to sheet parts from rifle mouth 10, becoming the thermal source of plasma arc surfacing.
Claims (7)
1. a micro-plasma arc welding rifle, is characterized in that: comprise tungsten electrode pressure head (1), sealing ring (2), tungsten electrode folder (3), upper cutting gun (4), insulator (5), lower gun body (6), centering fore-set (7), centering collar (8), rifle mouth (10), protection gas cap (11), tungsten electrode (12) and handle (17), wherein upper cutting gun (4) is made up of upper cutting gun endosome (4-1) and upper cutting gun ectosome (4-2), and upper cutting gun endosome (4-1) is cylindrical, and there is centre bore at axle center place, and the external diameter on middle part and top is greater than lower outer diameter, upper cutting gun ectosome (4-2) is for circular, be enclosed within middle part and the lower external of upper cutting gun endosome (4-1), C font upper cutting gun cooling water channel (C4-1) is formed between the bottom of upper cutting gun endosome (4-1) and upper cutting gun ectosome (4-2), the 2nd joint (G2) that the upper installation one of upper cutting gun ectosome (4-2) is connected with upper cutting gun cooling water channel (C4-1) one end and the 5th joint (G5) be connected with upper cutting gun cooling water channel (C4-1) other end, the first joint (G1) that 2nd joint (G2) is connected with upper cutting gun endosome (4-1) centre bore with upper cutting gun ectosome (4-2) and the upper installation one of upper cutting gun endosome (4-1) of the 5th joint (G5) upside, lower gun body (6) is made up of lower gun body water channel sealing ring (6-1), lower gun body endosome (6-2), protection gas screen pack (6-3), lower gun body ectosome (6-4) and protection gas circuit outer wall (6-5), there is centre bore at the axle center place of described lower gun body endosome (6-2), and lower gun body ectosome (6-4) is enclosed within the outside of lower gun body endosome (6-2), lower gun body water channel sealing ring (6-1) is connected between the upper end inner peripheral surface of lower gun body ectosome (6-4) and the upper end outer circumferential face of lower gun body endosome (6-2), lower gun body cooling water channel is formed, the 6th joint (G6) that lower gun body ectosome (6-4) top is installed the 3rd joint (G3) be connected with lower gun body cooling water channel one end and is connected with the lower gun body cooling water channel other end between lower gun body ectosome (6-4) and lower gun body endosome (6-2), protection gas circuit outer wall (6-5) is enclosed within the outside of lower gun body ectosome (6-4), and upper end is fixed on the outer circumference surface of lower gun body ectosome (6-4) middle part, protection gas screen pack (6-3) is arranged between protection gas circuit outer wall (6-5) middle part inner peripheral surface and lower gun body ectosome (6-4) middle part outer circumference surface, space between protection gas circuit outer wall (6-5) and lower gun body ectosome (6-4) is protection gas passage, and the 4th joint (G4) be connected with protection gas channel upper is installed on protection gas circuit outer wall (6-5) top, insulator (5) is annular, be arranged between upper cutting gun (4) and lower gun body (6), upper cutting gun (4), insulator (5) and lower gun body (6) are coated with thermosetting resin hot pressing layer, form Welding gun main body structure,
There is a centre bore middle and lower part of tungsten electrode pressure head (1), centre bore lower inner diameter is greater than upper inner diameter, form shoulder (1-1) at reducing place thus, the top of tungsten electrode pressure head (1) bottom and upper cutting gun endosome (4-1) is threaded connection; Sealing ring (2) is located between tungsten electrode pressure head (1) lower outer circumferential face and upper cutting gun endosome (4-1) top inner peripheral surface;
Centering collar (8) is arranged in the centre bore on upper cutting gun endosome (4-1) bottom, insulator (5) and lower gun body endosome (6-2) top, and upper inner diameter is greater than lower inner diameter; Centering fore-set (7) is tubulose, is arranged on centering collar (8) upper interior portion; Tungsten electrode folder (3) is tubulose, bottom is inserted in centering collar (8) upper interior portion, lower end contacts with the upper port of centering fore-set (7), and upper surface contacts with the shoulder (1-1) on tungsten electrode pressure head (1); The top of rifle mouth (10) and the bottom of lower gun body endosome (6-2) are threaded connection; Protection gas cap (11) is enclosed within rifle mouth (10) outside, and top is threaded connection with protection gas circuit outer wall (6-5) bottom; Tungsten electrode (12) is inserted in tungsten electrode pressure head (1), tungsten electrode folder (3) from top to bottom, feels relieved in the centre bore of fore-set (7), centering collar (8), lower gun body endosome (6-2) and rifle mouth (10);
Handle (17) is arranged on the outside side of thermosetting resin hot pressing layer, inside establish ion-gas air inlet pipe (13), upper cutting gun water inlet pipe (14), upper cutting gun outlet pipe (14 ＇), lower gun body water inlet pipe (15), lower gun body outlet pipe (15 ＇) and protection gas air inlet pipe (16), wherein the inner of ion-gas air inlet pipe (13) is connected with the 1st joint (G1), the inner of upper cutting gun water inlet pipe (14) is connected with the 2nd joint (G2), the inner of upper cutting gun outlet pipe (14 ＇) is connected with the 5th joint (G5), the inner of lower gun body water inlet pipe (15) is connected with the 3rd joint (G3), the inner of lower gun body outlet pipe (15 ＇) is connected with the 6th joint (G6), the inner of protection gas air inlet pipe (16) is connected with the 4th joint (G4).
2. micro-plasma arc welding rifle according to claim 1, is characterized in that: described micro-plasma arc welding rifle also comprises a sealing ring (9) be arranged between thermosetting resin hot pressing layer lower end and protection gas cap (11) upper end.
3. micro-plasma arc welding rifle according to claim 1, it is characterized in that: described rifle mouth (10) adopts the convergence type design of monotrysian type circular cone band cylindrical section, top is the air inlet section (L10-1) with cylindrical center bore, air inlet section (L10-1) downside is rectification section (L10-2), and the center-hole diameter of rectification section (L10-2) is less than the center-hole diameter of air inlet section (L10-1); Rectification section (L10-2) downside is compression section (L10-3), and the centre bore of compression section (L10-3) is conical; Downside, compression section (L10-3) is ejection section (L10-4), and the center-hole diameter of ejection section (L10-4) equals the basal diameter of compression section (L10-3).
4. micro-plasma arc welding rifle according to claim 3, it is characterized in that: the mode that the junction of the rectification section (L10-2) of described rifle mouth (10), compression section (L10-3) and ejection section (L10-4) adopts circular arc excessive, avoid gas flow to occur eddy current when junction.
5. micro-plasma arc welding rifle according to claim 1, it is characterized in that: upper end (L3-1) outer dia of described tungsten electrode folder (3) is greater than middle part and bottom (L3-2) external diameter, and middle and lower part and bottom (L3-2) are symmetrically distributed with the open seam that many width are 0.5mm vertically; Outside, bottom (L3-2) is pyramidal structure, and the upper port (L7-1) of the centering fore-set () 7 corresponding with the lower port of bottom (L3-2) is conical.
6. micro-plasma arc welding rifle according to claim 1, it is characterized in that: the top of described lower gun body cooling water channel is that C font cooling water enters aquaporin (C6-1) and cooling water exhalant canal (C6-3), wherein cooling water is entered aquaporin (C6-1) and is connected with lower gun body water inlet pipe (15) by the 3rd joint (G3), cooling water exhalant canal (C6-3) is connected with lower gun body outlet pipe (15 ＇) by the 6th joint (G6), middle part is for entering water interface channel (C6-2) and water outlet interface channel (C6-4), bottom is an annular water-cooled space (C6-5), cooling water enters aquaporin (C6-1) and is connected with annular water-cooled space (C6-5) with water outlet interface channel (C6-4) respectively by entering water interface channel (C6-2) with cooling water exhalant canal (C6-3).
7. micro-plasma arc welding rifle according to claim 1, it is characterized in that: the annular space formed between the outer surface top of described lower gun body ectosome (6-4), the inner surface top of protection gas circuit outer wall (6-5) and protection gas screen pack (6-3) is protection air chamber (G6-1), and this protection air chamber (G6-1) is connected with protection gas air inlet pipe (16) the inner by the 4th joint (G4); Multiple protection gas exit passageway (G6-2) symmetrical is vertically formed between the outer surface bottom of lower gun body ectosome (6-4), the inner surface bottom of protection gas circuit outer wall (6-5) and protection gas screen pack (6-3).
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| CN108145294A (en) * | 2016-12-02 | 2018-06-12 | 唐山开元焊接自动化技术研究所有限公司 | A kind of high powered plasma welding gun |
| CN109732185A (en) * | 2019-03-06 | 2019-05-10 | 山东职业学院 | A kind of novel plasma powder weld deposition welding gun structure |
| CN109759674A (en) * | 2019-01-11 | 2019-05-17 | 东方电气集团东方汽轮机有限公司 | A kind of carbon arc gouging gun of deep hole |
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