CN215593187U

CN215593187U - Three-in twelve-beam out type coaxial laser cladding nozzle

Info

Publication number: CN215593187U
Application number: CN202122906527.9U
Authority: CN
Inventors: 陶汪; 王威; 洪臣; 王树良; 马金田
Original assignee: Acunity Tianjin Co ltd
Current assignee: Acunity Tianjin Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-01-21
Anticipated expiration: 2031-11-25

Abstract

The utility model provides a three-in twelve-beam out-type coaxial laser cladding nozzle which comprises an outer core and an inner core, wherein central through holes of the outer core and the inner core are butted and combined to form a laser beam channel positioned in the center of the nozzle, an equal-distribution annular cavity is formed by sleeving the inner core and the outer core, the upper part of the equal-distribution annular cavity is communicated with three powder input channel holes, and the lower end of the equal-distribution annular cavity is communicated with twelve powder output channel holes; twelve shunting blocks are circumferentially arranged in an annular area of the inner side wall of the equipartition annular cavity between an output orifice of the powder input channel hole and a top inlet of the powder output channel hole, each shunting block protrudes towards the outer side wall of the equipartition annular cavity along the radial direction, and a shunting channel is formed by a gap between every two adjacent shunting blocks. The utility model has simple structure, improves the powder utilization rate, can provide up to twelve beam current powder output, ensures the miniaturization of the volume and is convenient to install and maintain.

Description

Three-in twelve-beam out type coaxial laser cladding nozzle

Technical Field

The utility model belongs to the technical field of laser cladding equipment, and particularly relates to a three-in twelve-beam out type coaxial 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 coaxial powder feeding, if the number of powder channels is too small, the powder spot shape formed by the powder injected from the powder channels and gathered is not uniform enough. However, the existing nozzle integrating powder channels into the nozzle itself is limited in that each powder channel is mostly in an independent structural design, and each powder channel needs to occupy a certain volume of the nozzle, so that the output beam current of the powder of the nozzle is usually limited to six beams at most, and if the number of the beam current is increased, the overall volume of the nozzle is greatly increased, and the nozzle cannot be applied to a processing scene needing a small-volume nozzle.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a three-in twelve-beam out type coaxial laser cladding nozzle, which specifically comprises:

the three-in twelve-beam out-type coaxial laser cladding nozzle comprises an outer core and an inner core, wherein central through holes of the outer core and the inner core are butted and combined together to form a laser beam channel positioned in the center of the nozzle, an equal-dividing annular cavity is formed together by sleeving the inner core and the outer core, the upper part of the equal-dividing annular cavity is communicated with three powder input channel holes, and the lower end of the equal-dividing annular cavity is communicated with twelve powder output channel holes.

The inner core is constructed to form a top wall and an inner side wall which are equally divided into the annular cavity, the outer core is constructed to form an outer side wall and a bottom wall which are equally divided into the annular cavity, and the three powder input channel holes and the twelve powder output channel holes are uniformly distributed on the outer core respectively by taking the axis of the laser beam channel as the center.

The output orifices of the three powder input channel holes are respectively arranged on the upper part of the outer side wall of the equal-dividing annular cavity, and the top inlets of the twelve powder output channel holes are respectively arranged on the bottom wall of the equal-dividing annular cavity.

Twelve shunting blocks are circumferentially arranged in an annular area of the inner side wall of the equipartition annular cavity between an output orifice of the powder input channel hole and a top inlet of the powder output channel hole, each shunting block protrudes towards the outer side wall of the equipartition annular cavity along the radial direction, and a shunting channel is formed by a gap between every two adjacent shunting blocks.

The bottom end of each shunting block is over against and is positioned right above the top inlet of a powder output channel hole, and a second gap is reserved, all the second gaps are communicated to form an annular second confluence ring cavity, and a gap is reserved between the top end of each shunting block and the top wall of the equal division ring cavity to form an annular first confluence ring cavity.

The circumferential width of each shunting block is gradually increased from top to bottom, and the width of each shunting channel is gradually narrowed from top to bottom.

The output orifice of each powder input passage hole is located directly above the top end face of a corresponding one of the diverter blocks.

The top inlet of each powder output channel hole is directly over and is positioned on the bottom end surface of a corresponding shunting block.

The cooling water device also comprises an outer ring sleeve, and a cooling water channel is formed by the sealing sleeve joint of the inner core and the outer ring sleeve.

The top inlet of each powder output channel hole is in a bell mouth shape

The utility model has simple structure, improves the powder utilization rate, can provide up to twelve beam current powder output, ensures the miniaturization of the volume and is convenient to install and maintain.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a perspective view of the present invention in its entirety;

FIG. 2 is a schematic bottom view of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic sectional view taken along line A-A in FIG. 3;

FIG. 5 is a schematic sectional view taken along line B-B in FIG. 3;

FIG. 6 is a perspective view of the outer core;

FIG. 7 is a schematic top view of the outer core;

FIG. 8 is a schematic sectional view taken along line C-C in FIG. 7;

FIG. 9 is a perspective view of the outer collar;

FIG. 10 is a perspective view of the inner core;

FIG. 11 is a schematic side view of the inner core;

FIG. 12 is a schematic sectional view taken along line D-D in FIG. 11;

FIG. 13 is a schematic sectional view taken along line E-E in FIG. 11.

Reference numerals in the drawings:

an outer core 1; a powder output passage hole 11; a top inlet 112; a powder input passage hole 14; an output orifice 141;

an inner core 2; a spacer 23; an outer ring sleeve 3; a powder tube 4; a water pipe 5; a fastening bolt 6; a laser beam channel 7; a cooling water passage 8;

the annular cavity 9 is divided equally; a top wall 91; an inner sidewall 92; an outer side wall 93; a shunting block 94; a flow dividing passage 941.

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 three-in twelve-beam out-type coaxial laser cladding nozzle comprises an outer core 1, an inner core 2 and an outer ring sleeve 3, the three parts are fastened together through fastening bolts 6 sequentially penetrating through the inner core 2, the outer ring sleeve 3 and the outer core 1, a laser beam channel 7 located in the center of the nozzle is formed by butting and combining respective central through holes of the outer core 1 and the inner core 2, a cooling water channel 8 is formed by sealing and sleeving of the inner core 2 and the outer ring sleeve 3, a uniform ring cavity 9 is formed by sleeving of the inner core 2 and the outer core 1, the upper part of the uniform ring cavity 9 is communicated with three powder input channel holes 14, the lower end of the uniform ring cavity is communicated with twelve powder output channel holes 11, and cladding powder is uniformly distributed and output by the twelve powder output channel holes 11 after being uniformly distributed by the three powder input uniform ring cavities 9.

In this embodiment, each powder input channel hole 14 is connected to one powder tube 4, as shown in fig. 9, two water tubes 5 of the cooling water channel 8 are directly disposed on the outer ring sleeve 3 and are respectively communicated with two water through holes formed on the outer ring sleeve 3, as shown in fig. 12, the inner core 2 is provided with a partition portion 23 for blocking the cooling water channel 8 to form a C-shaped channel, and the two water through holes of the outer ring sleeve 3 are respectively communicated with two ends of the C-shaped channel.

In this embodiment, the inner space of the cavity of the equipartition ring cavity 9 is integrally a ring body with the axis of the laser beam channel as the center, the inner core 2 constructs the top wall 91 and the inner side wall 92 of the equipartition ring cavity 9, the outer core 1 constructs the outer side wall 93 and the bottom wall of the equipartition ring cavity 9, the three powder input channel holes 14 and the twelve powder output channel holes 11 are respectively and uniformly distributed on the outer core 1 with the axis of the laser beam channel as the center, the output orifices 141 of the three powder input channel holes 14 are respectively arranged on the upper part of the outer side wall 93 of the equipartition ring cavity 9, the top inlets 112 of the twelve powder output channel holes 11 are respectively arranged on the bottom wall of the equipartition ring cavity 9, the inner side wall 92 of the equipartition ring cavity 9 is provided with twelve shunting blocks 94 in the circumferential direction of the ring area between the output orifices 141 of the powder input channel holes 14 and the top inlets 112 of the powder output channel holes 11, each shunting block 94 protrudes towards the outer side wall 93 of the equipartition ring cavity 9 along the radial direction, the gaps between two adjacent shunting blocks 94 form shunting channels 941, the bottom end of each shunting block 94 is over against and is located right above the top inlet 112 of a powder output channel hole 11, and a second gap is reserved, all the second gaps are communicated to form an annular second confluence ring cavity, an annular first confluence ring cavity is also formed between the top end of each shunting block 94 and the top wall 91 of the equipartition ring cavity 9 through the reserved gap, namely, a first confluence ring cavity located at the upper part, twelve shunting channels 941 located at the middle part and a second confluence ring cavity located at the lower part are formed in the equipartition ring cavity 9 through twelve shunting blocks 94 arranged at the middle part, three bundles of powder input into the equipartition ring cavity 9 through the output orifices 141 of three powder input channel holes 14 are firstly converged at one time in the first confluence ring cavity, are primarily equally divided into twelve bundles by the twelve shunting channels 941, and then are secondarily converged through the second confluence ring cavity, finally, twelve bundles of output powder are uniformly distributed and output through twelve powder output channel holes 11.

Preferably, as shown in fig. 12 and 13, the width of each diversion block 94 in the circumferential direction gradually increases from top to bottom, and the width of the diversion channel 941 gradually decreases from top to bottom. This design facilitates each of the diversion passages 941 to fully collect powder from the first manifold ring cavity, further improving distribution uniformity.

Preferably, the output port 141 of each powder input channel hole 14 is located right above the top end face of the corresponding one of the splitter blocks 94, and the powder input from the output port 141 right above is blocked by the top end face of the splitter block 94 for the first time so as to be split into two parts, so that the powder can circumferentially flow to the upper inlets of the splitter channels farther away, and further, the powder capturing opportunities of each splitter channel 941 are ensured to be equal as much as possible.

Preferably, the top inlet 112 of each powder output channel hole 11 is directly over and located on the bottom end face of the corresponding diversion block 94, so as to provide more effective time for the second confluence ring cavity and further improve the equipartition effect.

Preferably, the top inlet 112 of each powder outlet channel hole 11 is flared to facilitate better powder collection.

The shunting block 94 may be integrally formed with the inner core 2, or, like this embodiment, a mounting groove of the shunting block is formed at a position corresponding to the outer peripheral wall of the inner core 2, a part of the shunting block 94 is fixed in the mounting groove by interference fit, and another part protrudes out of the outer peripheral wall of the inner core.

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 utility model, 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

1. The three-in twelve-beam out-type coaxial laser cladding nozzle comprises an outer core and an inner core, wherein central through holes of the outer core and the inner core are butted and combined to form a laser beam channel at the center of the nozzle, and the three-in twelve-beam out-type coaxial laser cladding nozzle is characterized in that an equal-division annular cavity is formed by sleeving the inner core and the outer core, the upper part of the equal-division annular cavity is communicated with three powder input channel holes, and the lower end of the equal-division annular cavity is communicated with twelve powder output channel holes; twelve shunting blocks are circumferentially arranged in an annular area of the inner side wall of the equipartition annular cavity between an output orifice of the powder input channel hole and a top inlet of the powder output channel hole, each shunting block protrudes towards the outer side wall of the equipartition annular cavity along the radial direction, and a shunting channel is formed by a gap between every two adjacent shunting blocks.

2. The three-in twelve-out coaxial laser cladding nozzle according to claim 1, wherein the space in the cavity of the equalizing ring cavity is integrally an annular body centered on the axis of the laser beam channel, the inner core is constructed to form the top wall and the inner side wall of the equalizing ring cavity, the outer core is constructed to form the outer side wall and the bottom wall of the equalizing ring cavity, and the three powder input channel holes and the twelve powder output channel holes are uniformly distributed on the outer core centered on the axis of the laser beam channel, respectively.

3. The three-in twelve-out coaxial laser cladding nozzle according to claim 2, wherein the output ports of the three powder input channel holes are respectively opened on the upper part of the outer side wall of the uniform annular cavity, and the top inlets of the twelve powder output channel holes are respectively opened on the bottom wall of the uniform annular cavity.

4. The three-in twelve-beam-out coaxial laser cladding nozzle of claim 1, wherein the bottom end of each shunting block is over against and is located right above the top inlet of a powder output channel hole with a second gap, all the second gaps are communicated to form an annular second confluence ring cavity, and a gap is also left between the top end of each shunting block and the top wall of the equipartition ring cavity to form an annular first confluence ring cavity.

5. The three-in twelve-beam out-type coaxial laser cladding nozzle of claim 1, wherein the circumferential width of each shunting block gradually increases from top to bottom, and the width of each shunting channel gradually decreases from top to bottom.

6. The three-in twelve-beam-out coaxial laser cladding nozzle of claim 1, wherein the output orifice of each powder input channel hole is located directly above the top end face of a corresponding one of the diverter blocks.

7. The three-in twelve-beam-out coaxial laser cladding nozzle of claim 1, wherein the top inlet of each powder output channel hole is directly over and located at the bottom end face of a corresponding splitter block.

8. The coaxial laser cladding nozzle of claim 1, further comprising an outer sleeve, wherein the inner core and the outer sleeve are sealed and sleeved to form a cooling water channel.

9. The three-in twelve-beam-out coaxial laser cladding nozzle of claim 1, wherein the top inlet of each powder output channel hole is flared.