CN106400005A - Turbulence protruding channel water cooling device used for laser cladding spray nozzle - Google Patents

Abstract

The invention discloses a turbulence protruding channel water cooling device used for a laser cladding spray nozzle. The turbulence protruding channel water cooling device is composed of water cooling conical sleeve and the cladding spray nozzle. The water cooling conical sleeve is located at the lower portion of the cladding spray nozzle, is in thread-fit connection with the cladding spray nozzle, and is internally provided with multiple stages of water cooling channels; all the stages of cooling channels are enlarged upward stage by stage in the axial direction of the cladding spray nozzle and communicate with one another through connecting channels; and micro-convex rib structures are uniformly distributed on the outer side face and bottom face of each water cooling channel and used for enhancing heat exchange cooling. During work, cooling water is supplied from a water inlet of the water cooling conical sleeve through an external water supply system, flows through the water cooling channels from the bottom stage by stage, and is sucked out from a water outlet of the water cooling conical sleeve. The water cooling conical sleeve covers the bottom of the cladding spray nozzle, protects the cladding spray nozzle through heat conduction, and shields laser reflection and molten pool heat radiation; and the rectangular water cooling channels and the micro-convex rib structures conduct temperature control heat dissipation and cooling enhancement on the cladding spray nozzle, and the cladding effect of the cladding spray nozzle is improved.

Description

A water-cooling device for turbulent raised channels for laser cladding nozzles

technical field

The invention belongs to the field of laser cladding technology and cooling of high-temperature components, and in particular relates to a water cooling device for a flow-disturbing convex channel used for a laser cladding spray head.

Background technique

Laser cladding is high-energy laser surface cladding. Its physical process is that under the irradiation of high-energy laser beams, the surface of the substrate is rapidly melted, and the liquid metal forms a small-scale molten pool. In the molten pool, the original metal material Mix with the added powder to form a new layer of liquid metal layer. After the laser beam passes through, the temperature of the molten pool decreases, the liquid metal cools rapidly, and a new layer of solid cladding layer is formed on the metal surface. During the cladding process, the bottom of the laser cladding nozzle is very close to the molten pool, and the laser cladding nozzle must bear high heat from laser reflection and thermal radiation of the molten pool. As the laser cladding nozzle grows Working continuously over time, the heat will continue to accumulate, which will eventually burn out the laser cladding nozzle. Therefore, in order to prevent the laser cladding nozzle from being burned during continuous processing, it must be forcibly cooled.

In the patent CN205241792U, "a laser head and cooling device for inner hole cladding" is disclosed. The cooling part in this structure includes a water inlet, a water outlet, and a cooling cavity, wherein the water inlet and the water outlet are respectively connected to the cooling cavity; The structure of the laser head and the cooling device is simple, but multiple cooling components are required in actual assembly and production.

Contents of the invention

In order to avoid the defects of complex processing, limited cooling effect, and non-replaceable cooling structure of the cooling parts of the laser cladding nozzle in the prior art, the present invention proposes a water-cooling device for the turbulence protrusion channel for the laser cladding nozzle.

The technical solution adopted by the present invention to solve the technical problem is: including water-cooled cone sleeve, water outlet, water inlet, powder feeding hole, laser hole, water cooling channel, micro-convex rib, connecting channel, cladding nozzle, laser channel, powder feeding The channel is characterized in that the water-cooling cone is an inverted cone with an integrated structure of a ring and a cone, the inner wall of the ring on the upper part of the water-cooling cone is threaded, the water-cooling cone is located at the lower part of the cladding nozzle, and is threadedly connected with the cladding nozzle, The water-cooled cone sleeve is coaxial with the cladding nozzle and completely covers the bottom of the cladding nozzle;

The wall of the water-cooling tapered sleeve is provided with multi-stage water-cooling channels, and the water-cooling channels increase step by step around the cladding nozzle in the axial direction. There are several micro-convex ribs evenly distributed on the inner bottom of the channel, which are used to enhance heat exchange and cooling. There is a laser hole in the center of the bottom of the water-cooled cone sleeve, and powder feeding holes are evenly distributed along the circumference of the laser hole. The laser holes correspond to the laser channels in the cladding nozzle. Connected, and the diameter of the laser hole is larger than the diameter of the laser channel port. The powder feeding hole is connected to the powder feeding channel of the cladding nozzle, and the diameter of the powder feeding hole is larger than the diameter of the powder feeding channel. There are water outlets and water inlets on the side wall of the water-cooling cone sleeve. They are respectively connected with the upper port and the lower port of the water-cooling channel, and the water outlet and the water inlet of the water-cooling taper sleeve are respectively connected with the peripheral cooling system.

The micro-convex ribs are arc-shaped; the micro-convex ribs are arranged in a single row along the outer surface of the inner wall of the water-cooling channel and the inner bottom surface of the water-cooling channel in the same vertical plane, and are distributed at equal intervals along the water-cooling channel.

The cross-section of the water-cooling channel is rectangular.

The central axis of the water cooling channel coincides with the central axis of the laser channel.

The water-cooled drogue has multiple powder feeding holes, which are the same as the number of powder feeding channels of the cladding nozzle.

The cladding nozzle is a cone-shaped body, the inner cavity is a laser channel and is coaxial with the cladding nozzle, and the equal-diameter powder feeding channel is arranged in the wall of the cladding nozzle, and a plurality of powder feeding channels are evenly distributed along the circumferential axis of the cladding nozzle. And the extension lines of the axis of the powder feeding channel converge at one point.

Beneficial effect

The present invention is used for the water-cooling device of the turbulent convex channel of the laser cladding nozzle, which is composed of a water-cooling cone sleeve and a cladding nozzle. The water-cooling cone sleeve is located at the lower part of the cladding nozzle and connected by threads. The water-cooling channels at all levels increase step by step around the axial direction of the cladding nozzle, and the water-cooling channels are connected. The inner wall surface of the water-cooling channel and the bottom of the water-cooling channel are evenly distributed with micro-convex rib structures, which are used for enhanced heat transfer and cooling in high-temperature areas. , the effect is good.

The present invention is used for the water-cooling device of the turbulent convex channel of the laser cladding nozzle, which adopts the water-cooling cone sleeve to cover the cladding nozzle structure, and the multi-stage rectangular water-cooling channel surrounds the entire cladding nozzle, and fully covers the high-temperature area of the cladding nozzle. , to improve the cooling effect; the water-cooled cone structure covers the bottom of the cladding nozzle, protects the cladding nozzle through heat conduction, and shields the laser reflection and heat radiation of the molten pool; the rectangular water-cooling channel and the micro-rib structure control the temperature of the cladding nozzle Heat dissipation, enhanced cooling, and improved cladding effect of cladding nozzles. Increase the safety and reliability of the cladding nozzle, and at the same time increase the working time of the powder feeding nozzle, and avoid the powder blocking the powder outlet due to the deformation of the cladding nozzle under the influence of high temperature.

The present invention is used for the water cooling device of the turbulent raised channel of the laser cladding nozzle, which has the characteristics of simple structure and convenient installation and disassembly; it is applicable to multiple fields of laser cladding, laser three-dimensional manufacturing, material synthesis, laser repair, and laser processing.

Description of drawings

A water-cooling device for a flow-disturbing protrusion channel of the present invention for a laser cladding nozzle will be further described in detail below in conjunction with the drawings and embodiments.

Fig. 1 is an axonometric view of the water cooling device for the turbulence protrusion channel used in the laser cladding nozzle according to the present invention.

Fig. 2 is a sectional view along the line A-A of Fig. 1 .

Fig. 3 is a schematic diagram of the water cooling device for the turbulence protrusion channel used in the laser cladding nozzle of the present invention.

Fig. 4 is a sectional view along the B-B direction of Fig. 3 .

FIG. 5 is a cross-sectional view along line C-C of FIG. 3 .

Fig. 6 is an isometric view of the water-cooled drogue sleeve and the cladding nozzle after being mated and connected according to the present invention.

Fig. 7 is a bottom view of the water-cooled drogue sleeve of the present invention and the cladding nozzle after being mated and connected.

FIG. 8 is a cross-sectional view along the D-D direction of FIG. 7 .

In the picture:

1. Water outlet 2. Water inlet 3. Powder feeding hole 4. Laser hole 5. Water cooling channel 6. Micro convex rib 7. Powder feeding channel 8. Water cooling cone sleeve 9. Cladding nozzle 10. Laser channel 11. Connection channel

detailed description

This embodiment is a water-cooling device for a flow-disturbing protrusion channel for a laser cladding nozzle.

Referring to Figures 1 to 8, this embodiment is used for the water cooling device of the turbulent raised channel of the laser cladding nozzle, which is composed of a water-cooled cone sleeve 8 and a cladding nozzle 9, wherein the water-cooled cone sleeve 8 includes a water outlet 1 and a water inlet 2. Powder feeding hole 3, laser hole 4, water cooling channel 5, micro convex rib 6, connecting channel 11; cladding nozzle 9 includes powder feeding channel 7, laser channel 10; water cooling cone sleeve 8 is a ring and cone integrated structure Inverted conical body, the inner wall of the ring on the upper part of the water-cooling cone sleeve 8 is threaded, the water-cooling cone sleeve 8 is located at the lower part of the cladding nozzle 9 and installed coaxially with the cladding nozzle 9, and completely covers the bottom of the cladding nozzle 9; the water-cooling cone sleeve 8 and The cladding nozzle 9 is connected by threads, which is convenient for installation and disassembly. Among them, the wall of the water-cooling cone sleeve 8 is provided with a multi-stage water-cooling channel 5 with a rectangular cross-section, the central axis of the water-cooling channel 5 coincides with the central axis of the cladding nozzle 9, and the annular water-cooling channel 5 increases step by step around the axial direction of the cladding nozzle. The water-cooling channels 5 are connected in series through connecting channels 11 . On the outer surface of the inner wall of the water-cooling channel 5 and the inner bottom surface of the water-cooling channel 5, there are a number of micro-convex ribs 6 evenly distributed to enhance heat exchange and cooling; the micro-convex ribs 6 are arc-shaped; They are arranged in a single row in the same vertical plane with the inner bottom surface of the water-cooling channel 5 , and are equally spaced along the annular water-cooling channel 5 . The number of stages and cross-sectional dimensions of the water-cooling channel 5 and the size setting of the micro-convex ribs 6 all need to be determined according to the actual size, thickness and heat exchange and cooling requirements of the cladding nozzle 9 . There is a laser hole 4 in the center of the bottom of the water-cooling channel 5, and powder feeding holes 3 are evenly distributed along the circumference of the laser hole 4. The laser hole 4 communicates with the laser channel 10 in the cladding nozzle, and the diameter of the laser hole 4 is larger than the diameter of the laser channel port; The powder feeding hole 3 communicates with the powder feeding channel 7 of the cladding nozzle correspondingly, and the diameter of the powder feeding hole 3 is larger than that of the powder feeding channel 7 to ensure the smooth flow of the powder feeding channel 7 and the laser channel 10 . In this embodiment, the powder feeding holes 3 of the water-cooling cone sleeve are three through holes with equal diameters, and the number of powder feeding holes 3 of the water-cooling cone sleeve is the same as the number of powder feeding channels 7 of the cladding nozzle.

In this embodiment, a water outlet 1 and a water inlet 2 are processed on the side wall of the water-cooling taper sleeve 8 to communicate with the upper port of the water-cooling channel 5 and the lower port of the water-cooling channel 5 respectively. The water outlet 1 and the water inlet 2 of the water-cooling taper sleeve 8 are respectively Connect with peripheral cooling system. When working, the external cooling system flows cooling water from the water inlet 2 at the lower end of the water-cooling cone sleeve 8 into the water-cooling channel 5, and after the cooling water surrounds the entire cladding nozzle 9, the cooling system then sends cooling water from the water outlet at the upper end of the water-cooling cone sleeve 8 1 is drawn out and recovered through an external cooling system to cool the cladding nozzle 9. While the cooling water flows through the entire water-cooling channel 5 , the cooling effect is effectively enhanced due to the action of the micro-convex ribs 6 on the inner wall of the water-cooling channel 5 . The structure of the water-cooled cone sleeve 8 covers the bottom of the cladding nozzle 9, and protects the cladding nozzle 9 through heat conduction, and at the same time, it has the function of blocking the high heat brought by laser reflection and thermal radiation of the molten pool. The structure of the water-cooling channel 5 and the micro-convex ribs 6 enables the temperature distribution of the cladding nozzle 9 to dissipate heat, enhance cooling, and improve the cladding effect of the cladding nozzle 9 .

In this embodiment, the cladding nozzle 9 is an inverted cone, the upper part is a stepped cylinder, and the lower part is a conical structure. The inner cavity is a laser channel 10 coaxial with the cladding nozzle 9. The laser channel 10 is a stepped conical hole. . The cladding nozzle 9 is provided with equal-diameter powder feeding channels 7, and the three powder feeding channels 7 are evenly distributed in the circumferential direction of the central axis of the cladding nozzle 9, and the extension lines of the axes of the three powder feeding channels 7 converge at one point to achieve three Hole coaxial powder feeding.

Before the cladding nozzle 9 works, the water-cooling cone 8 with the water-cooling channel 5 is assembled and connected with the cladding nozzle 9 . Since the structure of the water-cooled taper sleeve 8 is a single integral part, the cooling effect will not be affected due to improper assembly, or water leakage will not occur. After the assembly is completed, the structure of the water-cooling cone 8 completely covers the cladding nozzle 9, and the bottom of the water-cooling cone 8 is processed with a laser hole 4 and a powder feeding hole 3 corresponding to the laser channel 10 and the powder feeding channel 7 of the cladding nozzle 9, respectively. Moreover, the diameters of the laser hole 4 and the powder feeding hole 3 are respectively larger than the diameter of the laser channel port and the diameter of the powder feeding channel 7; ensuring the smooth flow of the powder feeding channel 7 and the laser channel 10.

When the cladding nozzle 9 is working, the external cooling system sends cooling water from the water inlet 2 at the lower end of the water-cooling cone 8 into the water-cooling channel 5, and after surrounding the entire laser cladding nozzle 9, the cooling system sends the cooling water from the water-cooling cone 8 The water outlet 1 at the upper end is drawn out and recycled through the external cooling system. While passing through the entire water-cooling passage 5, the cooling effect is enhanced through the function of the micro-convex ribs 6. The bottom of the water-cooled cone sleeve 8 covers the bottom of the cladding nozzle 9, and protects the lower edge of the cladding nozzle most affected by heat radiation through heat conduction and shielding.

Claims (6)

1. A turbulent convex channel water cooling device for laser cladding nozzles, including water cooling cone sleeves, water outlets, water inlets, powder feeding holes, laser holes, water cooling channels, micro convex ribs, connecting channels, and cladding nozzles , laser passage, powder feeding passage, it is characterized in that: described water-cooling taper sleeve is the inverted conical body of circular ring and cone integral structure, and the ring inner wall of upper part of water-cooling taper sleeve has thread, and water-cooling taper sleeve is positioned at cladding nozzle bottom, and Threaded connection with the cladding nozzle, the water-cooled cone sleeve is coaxial with the cladding nozzle, and completely covers the bottom of the cladding nozzle; The wall of the water-cooling tapered sleeve is provided with multi-stage water-cooling channels, and the water-cooling channels increase step by step around the cladding nozzle in the axial direction. There are several micro-convex ribs evenly distributed on the inner bottom of the channel, which are used to enhance heat exchange and cooling. There is a laser hole in the center of the bottom of the water-cooled cone sleeve, and powder feeding holes are evenly distributed along the circumference of the laser hole. The laser holes correspond to the laser channels in the cladding nozzle. Connected, and the diameter of the laser hole is larger than the diameter of the laser channel port. The powder feeding hole is connected to the powder feeding channel of the cladding nozzle, and the diameter of the powder feeding hole is larger than the diameter of the powder feeding channel. There are water outlets and water inlets on the side wall of the water-cooling cone sleeve. They are respectively connected with the upper port and the lower port of the water-cooling channel, and the water outlet and the water inlet of the water-cooling taper sleeve are respectively connected with the peripheral cooling system. 2. the flow-disturbing raised channel water-cooling device for laser cladding sprinkler head according to claim 1, is characterized in that: described micro-convex rib is arc-shaped; The inner bottom surface of the channel is arranged in a single row in the same vertical plane and distributed at equal intervals along the water-cooling channel. 3. The water-cooling device for the spoiler protrusion channel for the laser cladding nozzle according to claim 1, wherein: the cross-section of the water-cooling channel is rectangular. 4. The water-cooling device for the spoiler protrusion channel for the laser cladding nozzle according to claim 1, wherein the central axis of the water-cooling channel coincides with the central axis of the laser channel. 5. the turbulent raised channel water cooling device for laser cladding spray head according to claim 1, it is characterized in that: the powder feeding hole of described water-cooled drogue is a plurality of, and with the powder feeding channel of cladding spray head same amount. 6. the flow-disturbing convex channel water cooling device for laser cladding spray nozzle according to claim 1, it is characterized in that: described cladding spray nozzle is a conical body, and inner cavity is a laser passage and is coaxial with cladding spray nozzle, The powder feeding channel with equal diameter is set in the wall of the cladding nozzle, and multiple powder feeding channels are evenly distributed along the circumference of the central axis of the cladding nozzle, and the extension lines of the axis of the powder feeding channel converge at one point.