CN113249722B - Coaxial multi-beam laser cladding nozzle - Google Patents
Coaxial multi-beam laser cladding nozzle Download PDFInfo
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- CN113249722B CN113249722B CN202110723693.7A CN202110723693A CN113249722B CN 113249722 B CN113249722 B CN 113249722B CN 202110723693 A CN202110723693 A CN 202110723693A CN 113249722 B CN113249722 B CN 113249722B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
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Abstract
The invention provides a coaxial multi-beam laser cladding nozzle which comprises a nozzle body, a laser channel and a plurality of powder channels, wherein each powder channel mainly comprises a powder pipe through hole formed in the nozzle body and a powder conveying pipe sleeved in the powder pipe through hole, and a pipe hole of the powder conveying pipe is used as a channel hole of the powder channel. The powder conveying pipe is replaceable, the cost is saved, the service life is prolonged, the powder conveying pipe is suitable for structural design of more beams, formed powder spots are more uniform, and larger powder conveying amount can be borne; the channel water cooling structure has an upper layer of water cooling circulation and a lower layer of water cooling circulation, has better cooling effect, and can bear laser cladding operation with higher power, higher thickness and higher speed.
Description
Technical Field
The invention belongs to the field of laser cladding equipment, and particularly relates to a coaxial multi-beam laser cladding nozzle.
Background
In the laser cladding process, the precision and uniformity of powder convergence are important influence factors influencing the utilization rate of cladding powder and the size and quality of a cladding layer. With the emergence of novel technologies such as high-speed laser cladding, higher requirements are provided for high-aggregation-precision powder feeding under large powder feeding quantity.
At present, the powder feeding mode of laser cladding basically adopts annular coaxial or multi-beam-flow coaxial powder feeding, and for multi-beam-flow coaxial powder feeding, the low uniformity of powder spots and the overlarge powder spots are always obstacles for restricting the application of the powder spots on high-speed laser cladding. For multi-beam-flow coaxial powder feeding, if the number of the powder channels is too small, the powder spot formed by the powder which is ejected from the powder channels and gathered is not uniform enough in shape; in addition, in the scheme of the prior publication, the powder channel is directly formed by integrally processing on the nozzle, so that the material of the nozzle cannot be selected from high-wear-resistant materials in order to facilitate processing and consider cost, the inner wall of the powder channel is easy to wear under the impact of metal powder for a long time, and sprayed powder beams are serious in divergence, so that the area of powder spots is enlarged, the shape of the powder spots is distorted, the whole nozzle needs to be replaced if maintenance is needed, and the equipment maintenance cost is high.
Disclosure of Invention
In view of this, the present invention provides a coaxial multi-beam laser cladding nozzle, which specifically comprises:
the coaxial multi-beam laser cladding nozzle comprises a nozzle body, a laser channel and a plurality of powder channels, wherein each powder channel mainly comprises a powder pipe through hole formed in the nozzle body and a powder conveying pipe sleeved in the powder pipe through hole, and a pipe hole of the powder conveying pipe is used as a channel hole of the powder channel.
Each powder channel further comprises a first connecting pipe fitting and a second connecting pipe fitting, the upper part of each powder pipe through hole of the nozzle body is further coaxially provided with a connecting screw hole section, the lower part of the first connecting pipe fitting is provided with an external thread section in threaded fit with the connecting screw hole section, the outer wall of the middle part forms a first nut section, and the upper part of the first connecting pipe fitting is provided with an upper external thread section; the lower end of the pipe hole of the second connecting pipe fitting is provided with a step threaded hole section which is matched and fixedly connected with the upper external thread section of the first connecting pipe fitting in a threaded manner, and the lower part of the outer wall of the second connecting pipe fitting is provided with a second nut section.
The pipe hole of the second connecting pipe fitting, the pipe hole of the first connecting pipe fitting and the powder pipe through hole are sequentially and coaxially communicated and have the same aperture, and the powder conveying pipe is fixedly sleeved in a mounting hole formed by sequentially and coaxially communicating the pipe hole of the second connecting pipe fitting, the pipe hole of the first connecting pipe fitting and the powder pipe through hole.
The end surface of the lower end pipe orifice of the powder conveying pipe is flush with the end surface of the lower end orifice of the through hole of the powder pipe, or the end surface of the lower end pipe orifice of the powder conveying pipe protrudes downwards from the end surface of the lower end orifice of the through hole of the powder pipe; the end surface of the upper end pipe orifice of the powder conveying pipe is flush with the end surface of the top end orifice of the second connecting pipe fitting, or the end surface of the upper end pipe orifice of the powder conveying pipe protrudes upwards from the end surface of the top end orifice of the second connecting pipe fitting.
The nozzle body is formed by assembling and fixedly connecting an outer nozzle core and an inner nozzle core which are respectively provided with a central through hole.
The central through hole of the outer core of the nozzle comprises a first hole section, a second hole section and a third hole section which are sequentially connected from bottom to top, and a transition step surface extending outwards in the radial direction is formed at the joint of the first hole section and the second hole section; the outer peripheral side of the nozzle inner core comprises a lower section and an upper section which are sequentially connected from bottom to top, the overall shape of the lower section of the nozzle inner core is matched with the second hole section of the nozzle outer core, and the overall shape of the upper section is matched with the third hole section of the nozzle outer core;
the middle part of the upper section is provided with an upper layer of first arc-shaped grooves and an upper layer of second arc-shaped grooves at intervals along the same annular direction taking the axis of the central through hole as the center, two partition plate parts for defining and separating the two arc-shaped grooves are respectively an upper layer of first partition plate parts and an upper layer of second partition plate parts, and the upper layer of first partition plate parts and the upper layer of second partition plate parts are arranged in a mirror image mode by taking the axis of the central through hole as the center;
the lower part of the lower section is provided with a C-shaped arc groove taking the axial lead of the central through hole as the center, the lower partition plate part separates two ends of the C-shaped arc groove along the circumferential direction, the lower partition plate part is positioned right below the upper first partition plate part, and the upper second partition plate part is positioned right above the middle part of the C-shaped arc groove;
the left side and the right side of the area between the upper-layer first clapboard part and the lower-layer clapboard part of the nozzle inner core are respectively provided with a left communicating through hole and a right communicating through hole along the longitudinal direction; two ends of the left communicating through hole are respectively communicated with the upper layer first arc-shaped groove and the C-shaped arc-shaped groove; two ends of the right communicating through hole are respectively communicated with the upper layer second arc-shaped groove and the C-shaped arc-shaped groove;
the nozzle inner core is sleeved in from an opening at the upper end of a central through hole of the nozzle outer core, and the end surface of the lower end of the nozzle inner core is sealed and abutted against a transition step surface which is formed at the joint of a first hole section and a second hole section of the central through hole of the nozzle outer core and extends radially outwards;
the upper section of the nozzle inner core is respectively sealed and attached to the inner hole wall of the third hole section of the nozzle outer core above and below the upper first arc-shaped groove and the upper second arc-shaped groove;
the outer core of the nozzle is also provided with a first mounting blind hole and a second mounting blind hole, the upper parts of which are correspondingly connected with a water inlet pipe connecting piece and a water outlet pipe connecting piece, and the lower end parts of the first mounting blind hole and the second mounting blind hole are also intersected and communicated with the corresponding first communicating hole and the second communicating hole respectively;
the bottom opening of the first through hole is formed in the hole wall of the lower end part of the first mounting blind hole, the top opening is formed in the hole wall of the third hole section of the central through hole of the outer core of the nozzle, and the top opening is close to one side, facing the upper second arc-shaped groove, of the upper second partition plate part;
the bottom opening of the second communicating hole is arranged on the hole wall of the lower end part of the second mounting blind hole, the top opening is arranged on the hole wall of the third hole section, and the top opening is close to one side, facing the upper first arc-shaped groove, of the upper second partition plate part.
The upper end opening of the left communication through hole is arranged at the end part of the lower groove wall of the upper layer first arc-shaped groove, which is close to the upper layer first partition plate part; the lower end opening of the left communication through hole is arranged at the end part of the upper groove wall of the C-shaped arc groove close to the left side surface of the lower partition plate part; the upper end opening of the right communication through hole is formed in the end part, close to the upper layer first partition plate part, of the upper layer second arc-shaped groove; the lower end opening of the right communicating through hole is arranged at the end part of the upper groove wall of the C-shaped arc-shaped groove, which is close to the right side surface of the lower clapboard part.
The upper first arc-shaped groove and the upper second arc-shaped groove are equal in length in the circumferential direction, the C-shaped arc-shaped groove is larger than the upper first arc-shaped groove or the upper second arc-shaped groove in the circumferential direction in length, and the C-shaped arc-shaped groove is not larger than the sum of the lengths of the upper first arc-shaped groove and the upper second arc-shaped groove in length in the circumferential direction.
The end surface of the lower end of the nozzle inner core is kept in sealing contact with the transition step surface through a first sealing rubber ring fixedly accommodated in a sealing rubber ring groove formed in the transition step surface;
the upper section of the nozzle inner core is provided with an annular sealing rubber ring groove above and below the upper first arc-shaped groove and the upper second arc-shaped groove respectively, the annular sealing groove below is positioned between the upper first arc-shaped groove, the upper second arc-shaped groove and the C-shaped arc-shaped groove below, two annular sealing rubber ring grooves are respectively provided with a sealing rubber ring, and the two sealing rubber rings are clamped in the two annular sealing rubber ring grooves of the upper section and between the inner hole walls of the third hole section of the nozzle outer core to keep sealed paste.
The whole shape of the lower section of the nozzle inner core is an inverted cone, the whole shape of the upper section is a cylinder, and the bottom of the C-shaped arc-shaped groove extends to the bottom end face of the lower section, so that the lower side groove wall of the C-shaped arc-shaped groove is absent.
The powder conveying pipe is replaceable, the cost is saved, the service life is prolonged, the powder conveying pipe is suitable for structural design of more beams, formed powder spots are more uniform, and larger powder conveying amount can be borne; the channel water cooling structure has an upper layer of water cooling circulation and a lower layer of water cooling circulation, has better cooling effect, and can bear laser cladding operation with higher power, higher thickness and higher speed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic view of FIG. 1 with the attachment ring hidden;
FIG. 3 is a schematic view of the nozzle core of FIG. 2 with the nozzle core hidden;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic bottom view of the present invention;
FIG. 6 is a schematic cross-sectional view along AA in FIG. 4;
FIG. 7 is a schematic sectional view taken along direction BB in FIG. 4;
FIG. 8 is a schematic sectional view taken along line CC of FIG. 4;
FIG. 9 is a perspective view of the nozzle core;
FIG. 10 is a schematic front view of the nozzle core;
FIG. 11 is a schematic sectional view taken along line DD in FIG. 10;
FIG. 12 is a top perspective view of the nozzle core
Fig. 13 is a schematic sectional view of fig. 12 taken along direction EE.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in the figure, the coaxial multi-beam laser cladding nozzle comprises a nozzle body 1, a laser channel 2 and at least six powder channels 5, wherein each powder channel mainly comprises a powder pipe through hole 51 arranged on the nozzle body and a powder conveying pipe 52 sleeved in the powder pipe through hole, the pipe hole of the powder conveying pipe 52 is used as the channel hole of the powder channel 5, namely, only the powder pipe through hole 51 for sleeving and installing the powder conveying pipe is required to be processed on the nozzle body, the processing requirement on the powder pipe through hole 51 can be greatly reduced, the material requirement of the nozzle body 1 is greatly reduced, the high requirements on the material and the processing precision are only limited to the powder conveying pipe 52, if the powder conveying pipe is worn, only the corresponding powder conveying pipe needs to be replaced, the nozzle body does not need to be replaced, the processing and maintenance cost can be saved, and the number of the powder channels of the coaxial multi-beam laser cladding nozzle can be more than six, the powder spot forming index is more ideal, and the laser cladding processing quality is improved.
The powder conveying pipe 52 is a single piece, so that the inner surface roughness of the powder conveying pipe can be controlled to be less than Ra1.6, and the hardness of the powder conveying pipe is more than 400 HV; the inner diameter of the pipe can be 0.8-2.0mm, the length of the pipe can be 55-120mm, better straightness of powder beam can be realized, the divergence angle of powder is less than 20 degrees, the size of working powder spot is 1.0mm-3.0mm, better wear resistance can be realized, and the cost of the nozzle can be saved by replacing a powder conveying pipe fitting.
Further, referring to fig. 6, each powder passage 5 further includes a first connecting pipe member 53 and a second connecting pipe member 54, the nozzle body 1 further coaxially defines a connecting screw hole section 511 at an upper portion of each powder pipe through hole 51, an external thread section 531 in threaded engagement with the connecting screw hole section 511 is disposed at a lower portion of the first connecting pipe member 53, and a first nut section 530 is formed at an outer wall of a middle portion thereof for a wrench-like tool to rotate the first connecting pipe member 53 so that the external thread section 531 is screwed and fastened to the connecting screw hole section 511; an upper external thread section 532 is arranged at the upper part of the first connecting pipe fitting 53, a step thread hole section for fixedly connecting with the upper external thread section 532 of the first connecting pipe fitting 53 in a threaded fit manner is formed at the lower end part of the pipe hole of the second connecting pipe fitting 54, a second nut section 541 is formed at the lower part of the outer wall of the second connecting pipe fitting 54, and the second nut section 541 is used for a wrench tool to rotate the second connecting pipe fitting 54 so as to enable the step thread hole section to be screwed and fastened with the upper external thread section 532 of the first connecting pipe fitting 53; the upper outer wall of the second connecting pipe 54 can be provided with an external thread section or a clamping part for connecting with the pipeline of the powder conveying equipment.
The pipe hole of the second connecting pipe 54, the pipe hole of the first connecting pipe 53 and the powder pipe through hole 51 are sequentially and coaxially communicated, the hole diameter is the same, the powder conveying pipe 52 is fixedly sleeved in an installation hole channel formed by sequentially and coaxially communicating the second connecting pipe 54, the pipe hole of the first connecting pipe 53 and the powder pipe through hole 51, the end surface of the pipe orifice at the lower end of the powder conveying pipe 52 is flush with the end surface of the orifice at the lower end of the powder pipe through hole 51, or the end surface of the pipe orifice at the lower end of the powder conveying pipe 52 is downward protruded out of the end surface of the orifice at the lower end of the powder pipe through hole 51; the end surface of the upper end pipe orifice of the powder conveying pipe 52 is flush with the end surface of the top end orifice of the second connecting pipe 54, or the end surface of the upper end pipe orifice of the powder conveying pipe 52 protrudes upwards from the end surface of the top end orifice of the second connecting pipe 54. So that the orifice of the powder duct 52 itself serves as a passage orifice of the powder passage 5 of the entire nozzle.
From the viewpoint of manufacturability of machining, the nozzle body 1 of the present invention is divided into an outer nozzle core 11 and an inner nozzle core 12, each having a central through hole, which are fastened together by a fastening bolt at the top, and which jointly constitute a laser passage 2 located at the center of the nozzle body 1 and a cooling water passage located inside the nozzle body 1 by merging;
specifically, as shown in fig. 7, the central through hole of the nozzle outer core 11 includes a first hole section 111, a second hole section 112, and a third hole section 113 that are sequentially connected from bottom to top, and a transition step surface 114 that extends radially outward is formed at the connection position of the first hole section 111 and the second hole section 112;
the outer periphery side of the nozzle inner core 12 comprises a lower section 121 and an upper section 122 which are sequentially connected from bottom to top, the overall shape of the lower section 121 of the nozzle inner core 12 is matched with the second hole section 112 of the nozzle outer core 11, and the overall shape of the upper section 122 is matched with the third hole section 113 of the nozzle outer core 11;
the middle part of the upper section 122 is provided with an upper layer first arc-shaped groove 1221 and an upper layer second arc-shaped groove 1222 at intervals along the same annular direction taking the central through hole axial lead of the nozzle inner core 12 as the center, and as shown in fig. 9 to fig. 13, two partition parts defining and separating the two arc-shaped grooves are an upper layer first partition part 1223 and an upper layer second partition part 1224, respectively, and the upper layer first partition part 1223 and the upper layer second partition part 1224 are arranged in a mirror image mode taking the central through hole axial lead of the nozzle inner core 12 as the center;
the lower part of the lower section 121 is provided with a C-shaped arc groove 1211 taking the axial lead of the central through hole of the nozzle inner core 12 as the center, the lower baffle plate portion 1212 separates the two ends of the C-shaped arc groove 1211 in the circumferential direction, the lower baffle plate portion 1212 is positioned right below the upper first baffle plate portion 1223, and the upper second baffle plate portion 1224 is positioned right above the middle part of the C-shaped arc groove 1211;
preferably, the upper-layer first arc-shaped groove 1221 and the upper-layer second arc-shaped groove 1222 are equal in length in the circumferential direction, respectively, and the length of the C-shaped arc-shaped groove 1211 in the circumferential direction is greater than the length of the upper-layer first arc-shaped groove 1221 or the upper-layer second arc-shaped groove 1222, and the length of the C-shaped arc-shaped groove 1211 in the circumferential direction is not greater than the sum of the lengths of the upper-layer first arc-shaped groove 1221 and the upper-layer second arc-shaped groove 1222.
The nozzle inner core 12 is further provided with a left communication through hole 1231 and a right communication through hole 1232 along the longitudinal direction at the left side and the right side of the area between the upper first partition part 1223 and the lower partition part 1212;
the upper end opening of the left communication through hole 1231 is communicated with the upper layer first arc-shaped groove 1221, and specifically, as shown in fig. 9 and fig. 10, the upper end opening of the left communication through hole 1231 is opened at the end of the lower groove wall of the upper layer first arc-shaped groove 1221, which is close to the left side surface of the upper layer first partition wall 1223; the lower end opening of the left communication through hole 1231 is communicated with the C-shaped arc-shaped groove 1211, and specifically, as shown in fig. 9 and fig. 10, the lower end opening of the left communication through hole 1231 is opened at the end of the upper groove wall of the C-shaped arc-shaped groove 1211, which is adjacent to the left side surface of the lower partition portion 1212;
the upper end opening of the right communicating through hole 1232 communicates with the upper layer second arc-shaped groove 1222, and specifically, as shown in fig. 9 and fig. 10, the upper end opening of the right communicating through hole 1232 is opened at the end of the upper layer second arc-shaped groove 1222 adjacent to the right side of the upper layer first partition part 1223; the lower end opening of the right communicating through hole 1232 communicates with the C-shaped arc-shaped groove 1211, and specifically, as shown in fig. 9 and fig. 10, the lower end opening of the right communicating through hole 1232 is opened at the end of the upper groove wall of the C-shaped arc-shaped groove 1211 adjacent to the right side surface of the lower partition portion 1212;
the nozzle inner core 12 is sleeved in from an opening at the upper end of a central through hole of the nozzle outer core 11, and is fastened together after the annular retaining shoulder 124 at the top and the nozzle outer core 11 penetrate through a fastening bolt, and the lower end surface of the nozzle inner core 12 abuts against a transition step surface 114 which is formed at the joint of a first hole section 111 and a second hole section 112 of the central through hole of the nozzle outer core 11 and extends radially outwards, and the transition step surface are kept sealed through a first sealing rubber ring 1141 which is fixedly accommodated in a sealing rubber ring groove formed in the transition step surface 114;
the upper section 122 of the nozzle inner core 12 is provided with an annular sealing rubber ring groove above and below the upper first arc-shaped groove 1221 and the upper second arc-shaped groove 1222, as shown in the figure, a first annular sealing rubber ring groove 1226 and a second annular sealing rubber ring groove 1225 are respectively arranged, the lower annular sealing groove is arranged between the upper first arc-shaped groove 1221, the upper second arc-shaped groove 1222 and the lower C-shaped arc-shaped groove 1211, the first annular sealing rubber ring groove 1226 and the second annular sealing rubber ring groove 1225 are respectively provided with a sealing rubber ring, and the upper first annular sealing rubber ring groove 1221 and the upper second arc-shaped groove 1222 are respectively sealed to form a first upper cooling water channel and a second upper cooling water channel which are arranged on the upper layer by two sealing rubber rings which are clamped between the first annular sealing rubber ring groove 1226 and the second annular sealing rubber ring groove 1225 of the upper section 122 and the inner hole wall of the third hole section 113 of the nozzle outer core 11 and a first sealing rubber ring 1141 which is clamped between the lower end surface of the lower end of the nozzle inner core 12 and the sealing rubber ring groove arranged on the transition step surface 114 A layer cooling water channel cavity which seals the C-shaped arc-shaped groove 1211 to form a lower layer cooling water channel cavity positioned at the lower layer;
in addition, as shown in fig. 8, the nozzle outer core 11 is further provided with a first mounting blind hole 411 and a second mounting blind hole for connecting the water inlet pipe connector 41 and the water outlet pipe connector 42, respectively, the water inlet pipe connector 41 and the water outlet pipe connector 42 are fixed with the corresponding internal threads on the upper portions of the first mounting blind hole 411 and the second mounting blind hole through the external thread section on the lower portion, respectively, and the lower end portions of the first mounting blind hole 411 and the second mounting blind hole are further intersected and communicated with the corresponding first communicating hole 412 and the second communicating hole;
specifically, the bottom opening of the first through hole 412 is opened on the lower end hole wall of the first mounting blind hole 411, the top opening is opened on the hole wall of the third hole section 113 of the central through hole of the nozzle outer core 11, and the top opening is close to the side of the upper second partition 1224 facing the upper second arc-shaped groove 1222;
the bottom opening of the second communication hole is arranged on the hole wall of the lower end part of the second mounting blind hole, the top opening is arranged on the hole wall of the third hole section 113 of the central through hole of the nozzle outer core 11, and the top opening is close to one side, facing the upper first arc-shaped groove 1221, of the upper second partition part 1224;
the cooling water circulation path in the whole nozzle body is as follows: through the water inlet pipe connecting member 41, the first mounting blind hole 411, the first communicating hole 412, into the beginning end of the upper second arc-shaped groove 1222, i.e. the end adjacent to the upper second partition 1224, through the upper second arc-shaped groove 1222, i.e. the second upper cooling water passage chamber, through the end of the upper second arc-shaped groove 1222, i.e. the right communicating hole 1232, downward, into the beginning end of the C-shaped groove 1211, through the C-shaped groove 1211, i.e. the lower cooling water passage chamber, upward through the left communicating hole 1231, into the beginning end of the upper first arc-shaped groove 1221, i.e. the end adjacent to the upper first partition 1223, through the upper first arc-shaped groove 1221, i.e. the first upper cooling water passage chamber, through the second mounting blind hole 1224, through the second mounting blind hole, the water outlet pipe connecting member 42, and exits the nozzle body.
The central through hole of the nozzle inner core 12 is coaxially in butt joint with the first hole section 111 of the central through hole of the nozzle outer core 11 to form a laser channel 2.
Preferably, the lower section 121 of the nozzle inner core 12 is an inverted cone in overall shape, the upper section 122 is a cylinder in overall shape, and the bottom of the C-shaped arc 1211 extends to the bottom end face of the lower section 121, so that the C-shaped arc 1211 lacks a lower side wall, and provides an avoiding space for machining left and right communication through holes longitudinally penetrating through the upper and lower layers, thereby facilitating machining and effectively reducing the size.
Further, in order to facilitate connection with the laser assembly, a connecting ring 13 is fixedly connected above the nozzle inner core 12 through bolts.
Furthermore, in order to reduce the weight, the outer circumferential surface of the nozzle outer core 11 is also provided with a plurality of weight reduction grooves 115 which play a role of reinforcing ribs and improve the strength.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The coaxial multi-beam laser cladding nozzle comprises a nozzle body, a laser channel and a plurality of powder channels, and is characterized in that the nozzle body is provided with a powder pipe through hole (51), a powder conveying pipe (52) is sleeved in the powder pipe through hole, a pipe hole of the powder conveying pipe (52) serves as a channel hole of the powder channel of the whole nozzle, the end face of a pipe orifice at the lower end of the powder conveying pipe (52) is flush with the end face of an orifice at the lower end of the powder pipe through hole (51), or the end face of a pipe orifice at the lower end of the powder conveying pipe (52) protrudes downwards from the end face of the orifice at the lower end of the powder pipe through hole (51);
each powder channel also comprises a first connecting pipe fitting (53) and a second connecting pipe fitting (54), the upper part of each powder pipe through hole (51) of the nozzle body is coaxially provided with a connecting screw hole section (511), the lower part of the first connecting pipe fitting (53) is provided with an external thread section (531) in threaded fit with the connecting screw hole section (511), the outer wall of the middle part forms a first nut section (530), and the upper part is provided with an upper external thread section (532); a step threaded hole section which is matched and fixedly connected with the upper external thread section (532) of the first connecting pipe fitting (53) in a threaded manner is formed at the lower end part of the pipe hole of the second connecting pipe fitting (54), and a second nut section (541) is formed at the lower part of the outer wall of the second connecting pipe fitting (54);
the nozzle body is formed by assembling and fixedly connecting an outer nozzle core (11) and an inner nozzle core (12) which are respectively provided with a central through hole;
the central through hole of the nozzle outer core (11) comprises a first hole section (111), a second hole section (112) and a third hole section (113) which are sequentially connected from bottom to top, and a transition step surface (114) extending outwards in the radial direction is formed at the joint of the first hole section and the second hole section;
the outer peripheral side of the nozzle inner core (12) comprises a lower section (121) and an upper section (122) which are sequentially connected from bottom to top, the overall shape of the lower section (121) of the nozzle inner core is matched with the second hole section (112) of the nozzle outer core, and the overall shape of the upper section (122) is matched with the third hole section (113) of the nozzle outer core;
the middle part of the upper section (122) is provided with an upper layer first arc-shaped groove (1221) and an upper layer second arc-shaped groove (1222) at intervals along the same annular direction taking the axis of the central through hole as the center, two partition parts for defining and separating the two arc-shaped grooves are an upper layer first partition part (1223) and an upper layer second partition part (1224), and the upper layer first partition part (1223) and the upper layer second partition part (1224) are arranged in a mirror image mode taking the axis of the central through hole as the center;
the lower part of the lower section (121) is provided with a C-shaped arc groove (1211) taking the axial lead of the central through hole as the center, the lower clapboard part (1212) separates the two ends of the C-shaped arc groove (1211) in the circumferential direction, the lower clapboard part (1212) is positioned right below the upper first clapboard part (1223), and the upper second clapboard part (1224) is positioned right above the middle part of the C-shaped arc groove (1211);
the left side and the right side of the area between the upper-layer first partition plate part (1223) and the lower-layer partition plate part (1212) of the nozzle inner core (12) are respectively provided with a left communication through hole (1231) and a right communication through hole (1232) along the longitudinal direction; two ends of the left communication through hole (1231) are respectively communicated with the upper layer first arc-shaped groove (1221) and the C-shaped arc-shaped groove (1211); two ends of the right communication through hole (1232) are respectively communicated with the upper-layer second arc-shaped groove (1222) and the C-shaped arc-shaped groove (1211);
the nozzle inner core (12) is sleeved in from an opening at the upper end of a central through hole of the nozzle outer core (11), and the end face of the lower end of the nozzle inner core (12) is sealed and abutted against a transition step face (114) which is formed at the joint of a first hole section (111) and a second hole section (112) of the central through hole of the nozzle outer core (11) and extends radially outwards;
the upper section (122) of the inner nozzle core (12) is hermetically attached to the inner hole wall of the third hole section (113) of the outer nozzle core above and below the upper first arc-shaped groove (1221) and the upper second arc-shaped groove (1222);
the nozzle outer core (11) is also provided with a first mounting blind hole (411) and a second mounting blind hole, the upper parts of which are correspondingly connected with the water inlet pipe connecting piece (41) and the water outlet pipe connecting piece (42), and the lower end parts of the first mounting blind hole (411) and the second mounting blind hole are also respectively intersected and communicated with the corresponding first communicating hole (412) and the second communicating hole;
the bottom opening of the first communication hole (412) is arranged on the hole wall of the lower end part of the first mounting blind hole (411), the top opening is arranged on the hole wall of a third hole section (113) of the central through hole of the outer core (11) of the nozzle, and the top opening is close to one side, facing the upper-layer second arc-shaped groove (1222), of the upper-layer second partition plate part (1224);
the bottom opening of the second communication hole is arranged on the hole wall of the lower end part of the second mounting blind hole, the top opening is arranged on the hole wall of the third hole section (113), and the top opening is close to one side, facing the upper first arc-shaped groove (1221), of the upper second partition plate part (1224).
2. The coaxial multi-beam laser cladding nozzle according to claim 1, wherein the tube hole of the second connecting tube (54), the tube hole of the first connecting tube (53) and the powder tube through hole (51) are sequentially and coaxially communicated and have the same aperture, and the powder conveying tube (52) is fixedly sleeved in a mounting hole formed by sequentially and coaxially communicating the tube hole of the second connecting tube (54), the tube hole of the first connecting tube (53) and the powder tube through hole (51).
3. The coaxial multi-beam laser cladding nozzle according to claim 2, wherein an upper end orifice end face of the powder conveying pipe (52) is flush with a top end orifice end face of the second connecting pipe member (54), or the upper end orifice end face of the powder conveying pipe (52) protrudes upwards from the top end orifice end face of the second connecting pipe member (54).
4. The coaxial multi-beam laser cladding nozzle according to claim 1, wherein the upper end opening of the left communication through hole (1231) is opened at the end of the lower groove wall of the upper first arc-shaped groove (1221) adjacent to the upper first partition plate (1223); the lower end opening of the left communication through hole (1231) is arranged at the end part of the upper groove wall of the C-shaped arc groove (1211) close to the left side surface of the lower clapboard part (1212); the upper end opening of the right communication through hole (1232) is arranged at the end part of the upper layer second arc-shaped groove (1222) close to the upper layer first clapboard part (1223); the lower end opening of the right communication through hole (1232) is arranged at the end part of the upper groove wall of the C-shaped arc groove (1211) close to the right side surface of the lower clapboard part (1212).
5. The coaxial multi-beam laser cladding nozzle according to claim 1, wherein the upper layer first arc-shaped groove (1221) and the upper layer second arc-shaped groove (1222) are equal in length in a circumferential direction, respectively, a length of the C-shaped arc-shaped groove (1211) in the circumferential direction is greater than a length of the upper layer first arc-shaped groove (1221) or the upper layer second arc-shaped groove (1222), and a length of the C-shaped arc-shaped groove (1211) in the circumferential direction is not greater than a sum of lengths of the upper layer first arc-shaped groove (1221) and the upper layer second arc-shaped groove (1222).
6. The coaxial multi-beam laser cladding nozzle according to claim 1, wherein the lower end face of the nozzle inner core (12) and the transition step face (114) are kept in sealing contact with each other through a first sealing rubber ring (1141) which is fixedly accommodated in a sealing rubber ring groove formed in the transition step face (114);
an annular sealing rubber ring groove is respectively formed in the upper portion section (122) of the nozzle inner core (12) above and below the upper first arc-shaped groove (1221) and the upper second arc-shaped groove (1222), an annular sealing groove in the lower portion is located between the upper first arc-shaped groove and the upper second arc-shaped groove and the lower C-shaped arc-shaped groove, two sealing rubber rings are respectively assembled in the two annular sealing rubber ring grooves, and the two sealing rubber rings are clamped in the two annular sealing rubber ring grooves in the upper portion section and between the inner hole walls of the third hole section of the nozzle outer core and kept in sealing and abutting.
7. The coaxial multi-beam laser cladding nozzle of claim 1, wherein the lower section of the nozzle inner core is in the shape of an inverted cone, the upper section is in the shape of a cylinder, and the bottom of the C-shaped arc-shaped groove extends to the bottom end face of the lower section, so that the lower side wall of the C-shaped arc-shaped groove is absent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723693.7A CN113249722B (en) | 2021-06-29 | 2021-06-29 | Coaxial multi-beam laser cladding nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723693.7A CN113249722B (en) | 2021-06-29 | 2021-06-29 | Coaxial multi-beam laser cladding nozzle |
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| Publication Number | Publication Date |
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| CN113249722A CN113249722A (en) | 2021-08-13 |
| CN113249722B true CN113249722B (en) | 2021-10-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050056628A1 (en) * | 2003-09-16 | 2005-03-17 | Yiping Hu | Coaxial nozzle design for laser cladding/welding process |
| CN201823642U (en) * | 2010-08-17 | 2011-05-11 | 华东理工大学 | Laser cladding coaxial powder delivery nozzle comprising guide protective air flow |
| CN104674211A (en) * | 2013-12-02 | 2015-06-03 | 财团法人金属工业研究发展中心 | Laser processing apparatus |
| CN111501040A (en) * | 2020-07-06 | 2020-08-07 | 亚琛联合科技（天津）有限公司 | Inner wall laser cladding device suitable for high draw ratio pipe fitting |
-
2021
- 2021-06-29 CN CN202110723693.7A patent/CN113249722B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050056628A1 (en) * | 2003-09-16 | 2005-03-17 | Yiping Hu | Coaxial nozzle design for laser cladding/welding process |
| CN201823642U (en) * | 2010-08-17 | 2011-05-11 | 华东理工大学 | Laser cladding coaxial powder delivery nozzle comprising guide protective air flow |
| CN104674211A (en) * | 2013-12-02 | 2015-06-03 | 财团法人金属工业研究发展中心 | Laser processing apparatus |
| CN111501040A (en) * | 2020-07-06 | 2020-08-07 | 亚琛联合科技（天津）有限公司 | Inner wall laser cladding device suitable for high draw ratio pipe fitting |
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| CN113249722A (en) | 2021-08-13 |
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Denomination of invention: Coaxial multi beam laser cladding nozzle Effective date of registration: 20230324 Granted publication date: 20211001 Pledgee: Agricultural Bank of China Limited Tianjin New Technology Industrial Park Branch Pledgor: ACUNITY (TIANJIN) Co.,Ltd. Registration number: Y2023120000010 |