A hot wire device for wire laser cladding
Through the innovatively designed wire laser cladding heat wire device, the poor heating effect and wire jamming problems of welding wire preheating device are solved, efficient and stable wire heating and continuous conveying are achieved, meeting the needs of automated production and improving the flexibility and efficiency of laser cladding.
Patent Information
- Application Number
- CN201910643239.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-07-17
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2039-07-17
AI Technical Summary
Among the existing wire laser cladding technology, the welding wire preheating device has poor heating effect and is prone to wire jamming, resulting in the inability to work continuously for a long time, hindering the development of wire laser cladding technology.
A new structure of wire laser clad hot wire device was designed. By innovatively setting up the heating structure of the hot wire device, including wire feeding tubes, connecting rods, flanges, insulating plates, water-cooling heads, conductive nozzles and insulating tubes, efficient heating is achieved and stable and continuous operation is maintained, up to 1000℃, and insulation and stable transportation between the conductive nozzles are ensured through insulating tubes and springs.
It realizes efficient heating of welding wire, up to 1000℃, and can continuously and stably heat, meets the requirements of automated continuous production, solves the problem of wire jamming, improves the flexibility and efficiency of laser cladding, has a solid structure, and has broad promotion and application prospects.
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Figure CN110241417B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of laser cladding, and in particular to a hot wire device for wire laser cladding. Background Art
[0002] Component corrosion is the main cause of damage to mechanical equipment. The quality of component corrosion resistance is directly related to the safe operation of mechanical equipment. Laser cladding of alloy powder onto the workpiece surface is a recently developed anti-corrosion technology. However, laser cladding technology using alloy powder still has problems such as low cladding efficiency, many defects, high cost, and large amounts of dust.
[0003] Wire laser cladding can solve the above problems very well, but due to the influence of the low laser absorption rate of the base material and the welding wire, the phenomenon of unfusion often occurs. To address this phenomenon, the laser power can be increased, but increasing the laser power will increase the dilution rate and cause energy waste. Therefore, if the welding wire can be heated before entering the molten pool, the above problems can be solved very well, and high-quality fusion effect can be achieved without increasing the laser power. However, the heating effect of the hot wire device used to preheat the welding wire in the existing technology is not good, and the wire jamming or wire peeling problems often occur, resulting in the inability to work continuously for a long time, which hinders the development of wire laser cladding technology. Summary of the Invention
[0004] In order to solve the above problems, the present invention proposes a wire laser cladding hot wire device with a brand-new structure. By innovatively setting the heating structure of the hot wire device, the heating effect of the hot wire is improved, and the maximum temperature can reach 1000°C. It can also heat continuously and stably, meeting the requirements of automated continuous production. The wire is smooth and does not get stuck. The structure is firm and it does not deform or shake during long-term operation, solving the development bottleneck problem of the existing wire laser cladding technology.
[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is:
[0006] A wire laser cladding hot wire device includes: a wire feed tube 2, a connecting rod 3, a flange 4, an insulating plate 17, an insulating gasket 15, a water-cooling head 7, a first conductive nozzle 10, a second conductive nozzle 14, an insulating tube 12 and a bolt 18; the connecting rod 3 is connected to the flange 4, the wire feed tube 2 is arranged in the connecting rod 3, the insulating plate 17 is arranged between the flange 4 and the water-cooling head 7, the insulating gasket 15 is arranged between the flange 4 and the bolt 18, the bolt 18 passes through the insulating gasket 15, the flange 4 and the insulating plate 17 in sequence and is then threadedly connected to the water-cooling head 7, the first conductive nozzle 10 is installed on the flange 4, the second conductive nozzle 14 is installed on the water-cooling head 7, and the insulating tube 12 is arranged between the first conductive nozzle 10 and the second conductive nozzle 14.
[0007] Further according to the wire laser cladding hot wire device of the present invention, the connecting rod 3, flange 4 and first conductive nozzle 10 are electrically connected to form a first conductor, the water cooling head 7 and the second conductive nozzle 14 are electrically connected to form a second conductor, the first conductor and the second conductor are insulated from each other by the insulating plate 17 and the insulating tube 12, the connecting rod 3 is connected to the first electrode of the hot wire machine, the water cooling head is provided with an electrode interface 8, and the electrode interface 8 is connected to the second electrode of the hot wire machine.
[0008] Further according to the wire laser cladding hot wire device of the present invention, wire feeding channels are provided in the wire feeding tube 2, the first conductive nozzle 10, the insulating tube 12 and the second conductive nozzle 14, and the wire feeding channel of the wire feeding tube 2, the wire feeding channel of the first conductive nozzle 10, the wire feeding channel of the insulating tube 12 and the wire feeding channel of the second conductive nozzle 14 are connected in sequence and have a common central axis. The welding wire 1 passes through each wire feeding channel in sequence and is heated in the wire feeding channel of the insulating tube 12.
[0009] Further according to the wire laser cladding hot wire device of the present invention, the insulating tube 12 is a high-temperature resistant insulating tube, and the inner diameters of the wire feeding channel of the first conductive nozzle 10, the wire feeding channel of the insulating tube 12 and the wire feeding channel of the second conductive nozzle 14 are greater than or equal to the outer diameter of the welding wire 1 and form a gap fit with the welding wire 1.
[0010] Further according to the wire laser cladding hot wire device of the present invention, the connecting rod 3 is a hollow cylindrical tubular structure, the bottom outer wall of the connecting rod 3 is threadedly connected to the top of the flange 4, and the hollow inner cavity of the connecting rod 3 is connected to the interior of the flange; the wire feeding tube 2 passes through the hollow inner cavity of the connecting rod 3, and the upper end of the wire feeding tube 2 is exposed outside the top end of the connecting rod 3, and the lower end of the wire feeding tube 2 abuts against the top end of the first conductive nozzle 10 inside the flange.
[0011] Further according to the wire laser cladding hot wire device of the present invention, the top of the first conductive nozzle 10 passes through the insulating plate 17 and is threadedly connected to the flange 4, the bottom of the first conductive nozzle 10 is formed with a wire outlet cylindrical hole with a certain depth of concave and an inner diameter that is a clearance fit with the outer diameter of the insulating tube 12, and the top of the insulating tube 12 is inserted into the wire outlet cylindrical hole with a clearance fit; the top of the second conductive nozzle 14 is threadedly connected to the water-cooling head 7, the top of the second conductive nozzle 14 is formed with a wire inlet cylindrical hole with a certain depth of concave and an inner diameter that is a clearance fit with the outer diameter of the insulating tube 12, and the bottom of the insulating tube 12 is inserted into the wire inlet cylindrical hole with a clearance fit, the central axes of the wire outlet cylindrical hole and the wire inlet cylindrical hole are collinear with the central axis of the wire feeding channel formed in the insulating tube 12, and the first conductive nozzle 10 and the second conductive nozzle 14 are insulated by the insulating tube 12.
[0012] Further, according to the wire laser cladding hot wire device of the present invention, it also includes a spring 11, which is arranged in the wire outlet cylindrical hole of the first conductive nozzle 10, and the upper end of the spring 11 abuts against the bottom surface of the wire outlet cylindrical hole, and the lower end abuts against the top of the insulating tube, or the spring 11 is arranged in the wire inlet cylindrical hole of the second conductive nozzle 10, and the upper end of the spring 11 abuts against the bottom end of the insulating tube, and the lower end abuts against the bottom surface of the wire inlet cylindrical hole.
[0013] Further, according to the wire laser cladding hot wire device of the present invention, it also includes a spring 11, which is arranged between the first conductive nozzle 10 and the insulating tube 12, or the spring 11 is arranged between the second conductive nozzle 10 and the insulating tube 12, and the insulating tube 12 is pressed toward the second conductive nozzle or the first conductive nozzle 10 by the spring 11 to ensure that the first conductive nozzle 10 and the second conductive nozzle 14 are insulated by the insulating tube 12.
[0014] Further, according to the wire laser cladding hot wire device described in the present invention, a shielding gas interface 16 is also provided on the flange 4, and the shielding gas interface 16 is connected to the cavity inside the flange between the bottom end of the connecting rod 3 and the top end of the first conductive nozzle 10, and an exhaust port 13 is also provided on the water cooling head 7.
[0015] Furthermore, according to the wire laser cladding hot wire device of the present invention, the water cooling head 7 is further provided with a cooling water inlet 5 and a cooling water outlet 6, which are respectively connected to the cooling water circulation channel inside the water cooling head.
[0016] The main innovative technologies and technical effects of the present invention include at least:
[0017] 1) The present invention innovatively connects the connecting rod to the flange through threads, and the flange, insulation plate, water-cooling head, and insulation pad are insulated by bolts. The insulation plate is between the flange and the water-cooling head, and the bolts are connected to the water-cooling head through threads and insulated from the flange, thereby insulating the flange and the water-cooling head from each other.
[0018] 2) The present invention innovatively connects the connecting rod and the flange through a threaded connection, and the first conductive nozzle and the flange through a threaded connection, forming a common electrical conductor after connection. Furthermore, the second conductive nozzle and the water-cooling head are innovatively connected through a threaded connection, and the electrode interface and the water-cooling head are innovatively connected through a threaded connection, forming a common electrical conductor after connection. These two common electrical conductors are respectively connected to the external hot wire machine electrodes, which innovates the power supply connection method of the conductive nozzle.
[0019] 3) The present invention innovatively provides a wire outlet cylindrical hole of a certain depth, coaxial with the wire feed channel, and with a diameter that is a clearance fit with the insulating tube, at the wire outlet end of the first conductive tip. A wire inlet cylindrical hole of a certain depth, coaxial with the wire feed channel, and with a diameter that is a clearance fit with the insulating tube is provided at the wire inlet end of the second conductive tip. The wire outlet cylindrical hole of the first conductive tip and the wire inlet cylindrical hole of the second conductive tip remain coaxial after installation and are coaxial with the wire feed channel of the intermediate insulating tube, thereby achieving linear conveying and heating of the welding wire.
[0020] 4) The present invention innovatively installs an insulating tube with a clearance fit between the wire outlet cylindrical hole of the first conductive nozzle and the wire inlet cylindrical hole of the second conductive nozzle, and a spring is provided between the first conductive nozzle and the insulating tube, thereby ensuring close contact between the second conductive nozzle and the insulating tube and maintaining good insulation between the first and second conductive nozzles;
[0021] 5) The present invention innovatively connects one electrode of an external hot wire machine to the first conductive tip through a connecting rod, and connects the other electrode of the hot wire machine to the second conductive tip through an electrode interface. The welding wire comes from the external wire feeder and passes through the wire feed tube, the first conductive tip, the spring, the insulating tube, and the second conductive tip in sequence. The first and second conductive tips are connected by the welding wire, which is heated by the welding wire resistance and then sent out through the second conductive tip to be clad. This hot wire structure is a completely new type of hot wire structure.
[0022] 6) The present invention innovatively provides a high-temperature resistant insulating tube between the first and second contact nozzles. The inner diameter of the wire feeding channel of the insulating tube is larger than the welding wire and forms a gap fit with the welding wire, thereby providing insulation and serving as a wire guide.
[0023] 7) The present invention innovatively provides a shielding gas interface on the flange and an exhaust port on the water cooling head. The shielding gas interface is connected to an external shielding gas source to protect the heating welding wire and the hot welding wire being delivered. The fume released by the heating welding wire and the hot welding wire being delivered is discharged through the second conductive nozzle and the exhaust port.
[0024] 8) The present invention innovatively provides a cooling water inlet and a cooling water outlet on the water cooling head, which are connected to the inlet and outlet of an external chiller respectively to cool the device and extend its service life;
[0025] 9) In summary, the hot wire device for wire laser cladding proposed in the present invention has good heating effect, with a hot wire effect of up to 1000°C, and can heat continuously and stably, meeting the requirements of automated continuous production. The wire is smooth and does not get stuck, the structure is firm, and it does not deform or shake during long-term operation. It solves the development bottleneck problem of existing wire laser cladding technology, greatly improves the flexibility, quality and efficiency of laser cladding, and has broad prospects for promotion and application. At the same time, the device described in the present invention has a simple structure, easy operation and reliable fixation, and belongs to a new generation of wire laser cladding equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the overall structure of the wire laser cladding hot wire device of the present invention.
[0027] Figure 2 for Figure 1 The schematic diagram of the cross-sectional structure of the wire laser cladding hot wire device along the AA line is shown.
[0028] Figure 3 for Figure 2 The cross-sectional structure diagram of the wire laser cladding hot wire device along line BB is shown.
[0029] The meanings of the reference numerals in the figures are as follows:
[0030] 1. Welding wire; 2. Wire feed tube; 3. Connecting rod; 4. Flange; 5. Cooling water inlet; 6. Cooling water outlet; 7. Water-cooled head; 8. Electrode interface; 9. Screw; 10. First conductive nozzle; 11. Spring; 12. Insulating tube; 13. Exhaust port; 14. Second conductive nozzle; 15. Insulating pad; 16. Shielding gas inlet; 17. Insulating plate; 18. Bolt; 19. Welding wire before heating; 20. Welding wire being heated; 21. Hot welding wire being fed out; 22. High-temperature welding wire to be clad. DETAILED DESCRIPTION
[0031] The present invention will be further described below in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand the present invention, but the scope of protection of the present invention is not limited thereby.
[0032] The present invention proposes a wire laser cladding hot wire device, as shown in the attached Figure 1 To the attached Figure 3As shown, the device includes a wire feed tube 2, a connecting rod 3, a flange 4, an insulating plate 17, an insulating gasket 15, a water-cooled head 7, a first conductive nozzle 10, a second conductive nozzle 14, an insulating tube 12, a spring 11, a bolt 18, and a screw 9. The connecting rod 3 and the flange 4 are connected by threads. The connecting rod 3 is a hollow cylindrical tubular structure, and the bottom outer wall of the connecting rod 3 is threadedly connected to the top of the flange 4. After connection, the two form a conductive body; the hollow inner cavity of the connecting rod 3 is connected to the interior of the flange. The flange 4, insulating plate 17, water-cooled head 7, and insulating gasket 15 are connected by bolts 18. Specifically, the insulating plate 17 is disposed between the flange 4 and the water-cooled head 7, and the insulating gasket 15 is disposed between the bolts 18 and the flange 4. The bolts 18 pass through the insulating gasket 15, the flange 4, and the insulating plate 17 in sequence, and are then threadedly connected to the water-cooled head 7. The threaded connection, combined with the insulating plate and insulating gasket, achieves the mutual insulation between the bolts 18 and the flange 4, and between the flange 4 and the water-cooled head 7. The first conductive nozzle 10 is installed on the flange and is located between the flange 4 and the water-cooling head 7. The second conductive nozzle 14 is installed on the water-cooling head 7. The insulating tube 12 is arranged between the first conductive nozzle 10 and the second conductive nozzle 14. The wire feeding tube 2 is installed in the hollow inner cavity of the connecting rod 3, and the upper end of the wire feeding tube 2 is exposed outside the top of the connecting rod 3. The lower end of the wire feeding tube abuts the top of the first conductive nozzle 10. The top of the first conductive nozzle 10 is threadedly connected to the flange 4. After the connection, the two are electrical conductors. The top of the second conductive nozzle 14 is threadedly connected to the water-cooling head 7. After the connection, the two are electrical conductors. The bottom of the first conductive nozzle passes through the insulating plate 17 and is located in the inner cavity of the water-cooling head 7. The bottom of the second conductive nozzle 14 is exposed outside the bottom of the water-cooling head 7. The first and second conductive tips 10, 14 each have a hollow wire feed passage formed therein. The insulating tube 12 and wire feed tube 2 also have wire feed passages formed therein. The wire feed passages of the wire feed tube 2, the first conductive tip 10, the insulating tube 12, and the second conductive tip 14 are sequentially connected and share a common central axis. The welding wire 1 extends from the top of the wire feed tube 2 through the wire feed passages of the wire feed tube, the first conductive tip, the insulating tube, and the second conductive tip, in sequence. The bottom wire outlet end of the first conductive tip is provided with a cylindrical wire outlet hole of a certain depth, coaxial with the wire feed passage, and with an inner diameter that is a clearance fit with the insulating tube 12. The top wire inlet end of the second conductive tip is provided with a cylindrical wire inlet hole of a certain depth, coaxial with the wire feed passage, and with an inner diameter that is a clearance fit with the insulating tube 12. The cylindrical wire outlet hole and the cylindrical wire inlet hole are coaxial after installation.An insulating tube 12 with clearance fit is installed between the wire outlet cylindrical hole of the first conductive nozzle 10 and the wire inlet cylindrical hole of the second conductive nozzle (14), and a spring 11 is provided between the first conductive nozzle 10 and the insulating tube 12. The second conductive nozzle 14 and the insulating tube 12 are in close contact, and the first conductive nozzle 10 and the second conductive nozzle 14 are insulated. Specifically, the spring 11 is provided in the wire outlet cylindrical hole of the first conductive nozzle 10, and the top clearance fit of the insulating tube 12 is inserted into the wire outlet cylindrical hole, and the spring 11 is located between the top of the insulating tube and the bottom surface of the wire outlet cylindrical hole in the wire outlet cylindrical hole. The bottom clearance fit of the insulating tube 12 is inserted into the wire inlet cylindrical hole of the second conductive nozzle. The first conductive nozzle and the second conductive nozzle are insulated from each other by the insulating tube 12, and the elastic squeezing action of the spring provided between the first conductive nozzle 10 and the insulating tube 12 can further ensure the mutual insulation between the first conductive nozzle 10 and the second conductive nozzle 14. After installation, the wire feed passages of the wire feed tube 2, the first conductive tip 10, the insulating tube 12, and the second conductive tip 14 form a coaxial wire feed passage that is sequentially connected. The insulating tube 12 is high temperature resistant, and the inner diameter of the wire feed passage is preferably greater than or equal to the outer diameter of the welding wire 1, forming a clearance fit with the welding wire 1, thereby providing insulation and serving as a wire guide.
[0033] The connecting rod 3 is externally connected to one electrode of the hot wire machine, thereby connecting the first contact tip 10 to one electrode of the hot wire machine through the flange 4 and the connecting rod. The water-cooled head 7 is connected to the electrode interface 8 via screws 9. The electrode interface 8 is connected to the other electrode of the hot wire machine, thereby connecting the second contact tip 14 to the other electrode of the hot wire machine through the water-cooled head 7 and the electrode interface 8. The flange 4 is provided with a shielding gas interface 16. The shielding gas interface 16 communicates with the cavity inside the flange between the lower end of the connecting rod 3 and the top of the first contact tip 10, and is connected to the wire feed channel through the wire feed tube. The water-cooled head 7 is provided with an exhaust port 13. The shielding gas interface 16 is externally connected to a shielding gas source. Shielding gas from the shielding gas source enters the wire feed channel through the shielding gas interface 16, providing gas shielding to the heated welding wire 20 and the discharged hot welding wire 21 passing through the channel. At the same time, the fumes released by the heated welding wire 20 and the discharged hot welding wire 21 are discharged through the second contact tip 14 and the exhaust port 13. Furthermore, the water-cooling head 7 is provided with a cooling water inlet 5 and a cooling water outlet 6, which are respectively connected to the inlet and outlet of the chiller. A cooling water circulation channel is provided inside the water-cooling head for cooling the device and extending its service life.
[0034] During operation, the hot wire laser cladding device of the present invention sequentially passes a welding wire 1 from an external wire feeder through a wire feed tube 2, a first conductive tip 10, a spring 11, an insulating tube 12, and a second conductive tip 14. The welding wire is then electrically connected between the first and second conductive tips 10, 14, which are electrically connected to the two electrodes of the hot wire machine. This heats the welding wire between the first and second conductive tips, turning it into a heating wire 20. After being heated, the heating wire 20 is then delivered through the second conductive tip 14 to become a hot welding wire 21. The hot welding wire 22 is then delivered through the second conductive tip outlet to become a high-temperature to-be-clad welding wire 22, which is then directly used for laser cladding welding. Shielding gas from the shielding gas system enters through the shielding gas inlet 16 to protect the heating wire 20. Fumes released by the heated wire are discharged through the exhaust port 13 and the second conductive tip 14, enhancing the stability of the hot wire. A water cooling system, connected to a water cooling head via the cooling water inlet 5 and cooling water outlet 6, reduces the device's temperature and extends its service life.
[0035] The following are application examples of the present invention:
[0036] Example 1:
[0037] This embodiment uses the wire laser cladding hot wire device described in the present invention to heat the welding wire, specifically a cylindrical welding wire. The welding wire from the wire feeder passes through the wire feeding tube 2, the first conductive nozzle 10, the spring 11, the insulating tube 12, the second conductive nozzle 14 in sequence, and is finally sent out.
[0038] In this example, the first conductive nozzle 10 and the second conductive nozzle 14 are respectively connected to the two electrodes of the hot wire machine, and the hot wire machine is connected through the welding wire 1 between the two to form a current loop. The welding wire itself has a certain resistance. The interaction between the current and the resistance causes the welding wire 1 to generate heat energy, thereby achieving a hot wire effect.
[0039] In this embodiment, the insulating tube 12 is resistant to high temperatures, has an inner diameter larger than the welding wire 1 and forms a clearance fit with the welding wire 1, and can serve as a wire guide tube while providing insulation.
[0040] In this example, the flange 4 is provided with a shielding gas interface 16, and the water-cooled head 7 is provided with an exhaust port 13. The shielding gas interface 16 is connected to an external shielding gas source to protect the heating welding wire 20 and the hot welding wire 21 being delivered. The fume released by the heating welding wire 20 and the hot welding wire 21 being delivered is discharged through the second conductive nozzle 14 and the exhaust port 13.
[0041] In this embodiment, the water cooling head 7 is provided with a cooling water inlet 5 and a cooling water outlet 6, which are respectively connected to the inlet and outlet of an external chiller to cool the device and extend its service life.
[0042] The beneficial effects of the present invention are as follows: In summary, the hot wire device for wire laser cladding proposed in the present invention has a good heating effect, a hot wire effect of up to 1000°C, and can heat continuously and stably, meeting the requirements of automated continuous production, with smooth wire feeding without wire jamming, a firm structure, and no deformation or shaking during long-term operation. It solves the development bottleneck problem of existing wire laser cladding technology, greatly improves the flexibility, quality and efficiency of laser cladding, and has broad prospects for promotion and application.
[0043] The above is only a description of the preferred embodiment of the present invention, and does not limit the technical solution of the present invention to this. Any known deformation made by those skilled in the art on the basis of the main technical concept of the present invention belongs to the technical scope to be protected by the present invention. The specific scope of protection of the present invention shall be subject to the records of the claims.
Claims
1. A hot wire laser cladding device, characterized in that: include: A wire feeding tube (2), a connecting rod (3), a flange (4), an insulating plate (17), an insulating gasket (15), a water cooling head (7), a first conductive nozzle (10), a second conductive nozzle (14), an insulating tube (12) and a bolt (18); the connecting rod (3) is connected to the flange (4), the wire feeding tube (2) is arranged in the connecting rod (3), the insulating plate (17) is arranged between the flange (4) and the water cooling head (7), the insulating gasket (15) is arranged between the flange (4) and the bolt (18), the bolt (18) passes through the insulating gasket (15), the flange (4) and the insulating plate (17) in sequence and is then threadedly connected to the water cooling head (7), the first conductive nozzle (10) is installed on the flange (4), the second conductive nozzle (14) is installed on the water cooling head (7), and the insulating tube (12) is arranged between the first conductive nozzle (10) and the second conductive nozzle (14); The connecting rod (3), the flange (4) and the first conductive nozzle (10) are electrically connected to form a first conductor, the water cooling head (7) and the second conductive nozzle (14) are electrically connected to form a second conductor, the first conductor and the second conductor are insulated from each other by the insulating plate (17) and the insulating tube (12), the connecting rod (3) is connected to the first electrode of the hot wire machine, the water cooling head is provided with an electrode interface (8), and the electrode interface (8) is connected to the second electrode of the hot wire machine; The wire feeding tube (2), the first conductive nozzle (10), the insulating tube (12) and the second conductive nozzle (14) are all provided with wire feeding channels, and the wire feeding channel of the wire feeding tube (2), the wire feeding channel of the first conductive nozzle (10), the wire feeding channel of the insulating tube (12) and the wire feeding channel of the second conductive nozzle (14) are sequentially connected and have a common central axis, and the welding wire (1) passes through each wire feeding channel in sequence and is heated in the wire feeding channel of the insulating tube (12); The insulating tube (12) is a high-temperature resistant insulating tube, and the inner diameters of the wire feeding channel of the first conductive nozzle (10), the wire feeding channel of the insulating tube (12), and the wire feeding channel of the second conductive nozzle (14) are greater than or equal to the outer diameter of the welding wire (1) and form a clearance fit with the welding wire (1).
2. The wire laser cladding hot wire device according to claim 1, characterized in that: The connecting rod (3) is a hollow cylindrical tubular structure, the bottom outer wall of the connecting rod (3) is threadedly connected to the top of the flange (4), and the hollow inner cavity of the connecting rod (3) is communicated with the interior of the flange; the wire feeding tube (2) passes through the hollow inner cavity of the connecting rod (3), and the upper end of the wire feeding tube (2) is exposed outside the top end of the connecting rod (3), and the lower end of the wire feeding tube (2) abuts against the top end of the first conductive nozzle (10) inside the flange.
3. The wire laser cladding hot wire device according to claim 2, characterized in that: The top of the first conductive nozzle (10) passes through the insulating plate (17) and is threadedly connected to the flange (4). The bottom of the first conductive nozzle (10) is formed with a wire outlet cylindrical hole with a certain depth of indentation and an inner diameter that is a clearance fit with the outer diameter of the insulating tube (12). The top of the insulating tube (12) is inserted into the wire outlet cylindrical hole with a clearance fit. The top of the second conductive nozzle (14) is threadedly connected to the water cooling head (7). The top of the second conductive nozzle (14) is formed with a wire inlet cylindrical hole with a certain depth of indentation and an inner diameter that is a clearance fit with the outer diameter of the insulating tube (12). The bottom of the insulating tube (12) is inserted into the wire inlet cylindrical hole with a clearance fit. The central axes of the wire outlet cylindrical hole and the wire inlet cylindrical hole are collinear with the central axis of the wire feeding channel formed in the insulating tube (12). The first conductive nozzle (10) and the second conductive nozzle (14) are insulated by the insulating tube (12).
4. The wire laser cladding hot wire device according to claim 3, characterized in that: The invention also includes a spring (11), wherein the spring (11) is arranged in the wire outlet cylindrical hole of the first conductive nozzle (10), and the upper end of the spring (11) abuts against the bottom surface of the wire outlet cylindrical hole, and the lower end abuts against the top end of the insulating tube, or the spring (11) is arranged in the wire inlet cylindrical hole of the second conductive nozzle (14), and the upper end of the spring (11) abuts against the bottom end of the insulating tube, and the lower end abuts against the bottom surface of the wire inlet cylindrical hole.
5. The wire laser cladding hot wire device according to claim 4, characterized in that: The insulating tube (12) is pressed toward the second conductive nozzle (14) or the first conductive nozzle (10) by the spring (11), ensuring that the first conductive nozzle (10) and the second conductive nozzle (14) are insulated by the insulating tube (12).
6. The wire laser cladding hot wire device according to claim 5, characterized in that: The flange (4) is further provided with a protective gas interface (16), and the protective gas interface (16) is connected to a cavity located inside the flange between the bottom end of the connecting rod (3) and the top end of the first conductive nozzle (10), and the water cooling head (7) is further provided with an exhaust port (13).
7. The wire laser cladding hot wire device according to any one of claims 1 to 6, characterized in that: The water cooling head (7) is also provided with a cooling water inlet (5) and a cooling water outlet (6), which are respectively connected to the cooling water circulation channel inside the water cooling head.
Citation Information
Patent Citations
Wire laser cladding hot wire device
CN210711740U