CN112144054B

CN112144054B - Laser cladding cooling device with fin type cooling fins

Info

Publication number: CN112144054B
Application number: CN202010877698.0A
Authority: CN
Inventors: 孙桂芳; 杨坤; 倪中华; 卢轶; 王占栋
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-12-13
Anticipated expiration: 2040-08-27
Also published as: CN112144054A

Abstract

The invention discloses a laser cladding cooling device with fin type cooling fins, which comprises a cooling disc of a workpiece capable of dissipating heat, a clamp and a heat dissipation water tank, wherein the cooling disc is provided with a plurality of fins; a water tank cooling water inlet channel and a water tank cooling water outlet channel are arranged on the side wall of the heat dissipation water tank; the cooling disc of the heat-radiating workpiece comprises a disc-shaped body and fin-type cooling fins; the front surface of the disc-shaped body is provided with a workpiece arranging part at the middle position, two annular cooling water channels are concentrically arranged at the periphery of the workpiece arranging part, and the disc-shaped body is respectively provided with a cooling disc cooling water inlet channel and a cooling disc cooling water outlet channel along the radial direction; fin type radiating fins are arranged on the back surface of the disc-shaped body; the protective cover is sealed at the open end of the radiating water tank and is wrapped outside the disc-shaped body, and a through hole a is formed in the middle of the protective cover; the through hole a is opposite to the workpiece placing part, and more than two clamps are uniformly arranged on the outer side of the protective cover. Therefore, the invention can comprehensively and efficiently dissipate heat and cool the substrate (workpiece) and improve the processing quality of the laser cladding formed part.

Description

Laser cladding cooling device with fin type cooling fins

Technical Field

The invention relates to the field of laser cladding, in particular to an efficient cooling device for laser cladding, which is suitable for laser cladding forming of fine-grained structural members and thin-walled members.

Background

Laser cladding, also known as laser cladding or laser cladding, is a technique for modifying a surface by subverting the traditional manufacturing concept. The method is characterized in that cladding layer materials are fed onto the surface of a substrate in different forms of powder adding modes, the powder is heated and melted under the irradiation effect of laser, falls into a molten pool formed on the surface of the substrate under the high-temperature effect of the laser, and is solidified by air cooling to form a surface cladding layer which is in good metallurgical bonding with the substrate. By the method for adding the surface coating with required performance on the surface of the substrate, not only can a part meeting the performance requirement be obtained, but also the manufacturing period and the manufacturing cost can be greatly shortened. Laser cladding fully combines various subjects such as optics, electricity, materials science and mechanical automation. At present, the technology is widely applied in the aerospace field, can be used for reliably and quickly repairing some important parts, and has no influence on the characteristics of the parts.

In the laser cladding process, the temperature of the substrate and the workpiece must be controlled within a certain range in order to ensure the cladding quality. Different from the traditional processing mode, the laser cladding can not directly cool the workpiece by adopting cooling liquid. In the cladding process, the heat of the substrate and the workpiece cannot be dissipated in time, so that heat accumulation can cause substrate warping, the solidification time of a molten pool is prolonged, and the forming quality of the workpiece is seriously influenced. Heat build-up can also lead to slow or even failure-to-collapse of workpiece Z-axis dimension accumulation. To avoid these problems, a laser cladding cooling device is very important.

In the past, cooling of a cladding layer and a substrate is mostly realized by reducing the temperature of a laser nozzle and optimizing process parameters, and the research on cooling and heat dissipation realized by cooling the substrate is less.

Wangsong, tianbushi, et al, at northeast university, applied for a laser cladding cooling device (patent No.: CN 201710227675.3) having a horizontal circular tube and a spiral tube which is upward in the vertical direction, respectively, in the vicinity of a laser processing head and a nozzle of the laser processing head. And cooling the workpiece by cooling water circulation in the spiral water-cooling pipe. The use through the device can cool down the work piece in laser cladding spare course of working, nevertheless has several not enough: firstly, the temperature of a laser processing head is high, when cooling water flows to a horizontal round pipe at the lower part of the laser processing head along a spiral water-cooling pipe, the temperature of the cooling water can rise correspondingly, and the effect of cooling and radiating a workpiece through heat exchange is not obvious; secondly, the cooling water pipe is not in direct contact with the workpiece or the substrate, but has a certain distance from the workpiece, and the cooling effect of the workpiece is not obvious; and thirdly, the cooling pipe near the laser processing head may influence the processing position of laser cladding while cooling and radiating the workpiece.

The Qipeng Source of Shandong science and technology university, wuyumei et al, put forward a utility model patent (patent number: CN 201721376156.5) named as a laser cladding cooling and protection device, the device was equipped with S-shaped cooling water channel in the base plate bottom, let in argon gas before the processing and discharge the air in the cooling and protection device, protected the course of working of work piece, prevent to oxidize, the base plate was arranged in the cooling and protection device bottom, through the water pump, the circulating water got into S-shaped cooling water channel and taken away the heat and cooled off the base plate bottom, be equipped with the cooling fin in the circulating water route, dispel the heat to the circulating water. The device can play certain heat dissipation cooling effect to the base plate in laser cladding course of working to can protect the work piece not oxidized, but there are two shortcomings: firstly, the device is used for radiating heat by virtue of an S-shaped cooling water channel at the bottom of a substrate, the side surface of the substrate is not provided with a corresponding cooling structure, cooling water is circulating water, the cooling water taking away heat of the substrate flows out of the cooling water channel and then is only radiated by virtue of radiating fins, and corresponding refrigeration equipment is not provided, so that if the processing period of a laser cladding workpiece is long, the cooling effect on the substrate is weakened; secondly, the substrate is arranged at the bottom of the cooling and protecting device, and the structure and the size of the cooling and protecting device can influence the movement of the powder head in the laser processing process, so that the size and the structure of a processed part can be greatly limited.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a laser cladding cooling device with fin type cooling fins. The device can comprehensively and efficiently dissipate heat and cool a substrate (workpiece), and improve the processing quality of a laser cladding formed part; in addition, the device has simple structure and safe operation, has no influence on the motion path of the laser processing head, and basically does not limit the size of a workpiece to be processed.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a laser cladding cooling device with fin type cooling fins comprises a protective cover, a cooling disc of a workpiece capable of dissipating heat, a clamp and a heat dissipation water tank. Wherein:

the heat dissipation water tank is of a cylindrical structure with one end open and the other end closed; and the side wall of the heat radiation water tank is provided with a water tank cooling water inlet channel and a water tank cooling water outlet channel;

the cooling disc comprises a disc-shaped body and fin-type cooling fins; the disc-shaped body is arranged at the open end of the heat radiation water tank, the front surface of the disc-shaped body is provided with a workpiece placing part at the middle position, two annular cooling water channels are concentrically arranged at the periphery of the workpiece placing part, a cooling disc cooling water inlet channel and a cooling disc cooling water outlet channel are respectively arranged in the disc-shaped body along the radial direction, and the back surface of the disc-shaped body is provided with the fin-type cooling fins;

the two annular cooling water channels are respectively an inner cooling water channel positioned on the inner side and an outer cooling water channel positioned on the outer side, the inlet side of the outer cooling water channel is communicated with the cooling water inlet channel of the cooling disc, and the outlet side of the outer cooling water channel is communicated with the cooling water outlet channel of the cooling disc; the inlet side of the inner cooling water channel is communicated with the inlet side of the outer cooling water channel through a connecting channel a, and the outlet side of the inner cooling water channel is communicated with the outlet side of the outer cooling water channel through a connecting channel b;

the protective cover is sealed at the open end of the heat dissipation water tank and is wrapped outside the disc-shaped body, and a through hole a is formed in the middle of the protective cover;

the through hole a is opposite to the workpiece placing part, and more than two clamps are uniformly arranged on the outer side of the protective cover along the circumferential direction of the through hole a; the cooperative work of the clamps can clamp and fix the workpiece arranged on the workpiece arranging part.

Furthermore, the fin-type radiating fins are integrally embedded in blind holes formed in the radiating water tank and close to the bottom of the tank, and comprise middle fixing parts and radiating fins uniformly arranged on the outer sides of the middle fixing parts;

the radiating fin is a streamline fork-shaped component and comprises a radiating fin body and more than two branch-shaped radiating fins; each branch-shaped radiating fin is arranged at the tail end of the radiating fin body and is formed by branching along the length extending direction of the radiating fin body;

one end of the middle fixing part is fixed to the back face of the disc-shaped body, and the other end of the middle fixing part is at a certain distance from the bottom of the heat dissipation water tank.

Furthermore, the tail end of the radiating fin is provided with two branch-shaped radiating fins.

Furthermore, the middle fixing part is of a hollow cylindrical structure.

Furthermore, the number of the water tank cooling water inlet channels and the number of the water tank cooling water outlet channels are 2;

the 2 water tank cooling water inlet channels are respectively a water tank cooling water inlet channel a and a water tank cooling water inlet channel b; the 2 water tank cooling water outlet channels are respectively a water tank cooling water outlet channel a and a water tank cooling water outlet channel b;

the water tank cooling water outlet channel a and the water tank cooling water outlet channel b are symmetrically arranged on the side wall of the heat dissipation water tank close to the bottom of the tank;

the water tank cooling water inlet channel a and the water tank cooling water inlet channel b are symmetrically arranged on the side wall of the radiating water tank close to the open end.

Furthermore, the connecting channels a and b are cooling water channel gaps arranged on the partition wall between the inner cooling water channel and the outer cooling water channel.

Furthermore, the workpiece placing part is a workpiece groove.

Further, the workpiece groove is rectangular, the inner cooling water channel and the outer cooling water channel are both rectangular and annular, and the through hole a is also rectangular.

Further, the number of the clamps is 4, and the clamps are arranged at the corner positions of the through holes a in a one-to-one correspondence manner; the clamp comprises a fixing part and a clamping part; the fixing part is integrally in a flat plate shape and penetrates through the protective cover through the fastening part to be fixed on the partition wall between the inner cooling water channel and the outer cooling water channel; the holding portion is raised from the flat plate-like fixed portion and has a flange shape.

According to the technical scheme, compared with the prior art, the invention has the following advantages:

1. according to the invention, the workpiece placing part is arranged in the middle of the front surface of the disc-shaped body, the two cooling water channels are arranged around the workpiece placing part, the fin-type radiating fins are connected to the back surface of the disc-shaped body, heat on the side surface and the bottom of the substrate (workpiece) is taken away through rapid flowing of cooling water, and forced cooling is carried out, so that the substrate (workpiece) can be cooled and radiated in an all-round and efficient manner, and the problem that the temperature of the workpiece is difficult to reduce is solved to a certain extent.

2. The fin-type radiating fin has a large surface area, so that the fin-type radiating fin has a large contact area with cooling water, and can play a better cooling and radiating effect in the same time compared with the conventional radiating fin. Meanwhile, the contact area is increased, and the flow speed is ensured, namely the radiating fins are designed to be streamline radiating fins (fork-shaped components comprise radiating fin bodies and more than two branch-shaped radiating fins, wherein each branch-shaped radiating fin is arranged at the tail end of each radiating fin body and is formed by branching along the length extension direction of the radiating fin body), so that the flowing of cooling water in a radiating water tank is facilitated, and the radiating is more facilitated.

3. The invention has no influence on the movement path of the laser processing head in structure, and also does not limit the size of a workpiece to be processed. The invention can fix the substrate through the clamp while radiating, effectively improves the forming quality of the workpiece and ensures the cladding efficiency.

4. The invention has simple structure, convenient operation, low manufacturing cost, good effect on controlling the temperature of the substrate and the workpiece, and is suitable for popularization and use.

Drawings

FIG. 1 is a structural view of a forced cooling apparatus of the present invention;

FIG. 2 is a view showing the structure of a protective cover of the forced cooling apparatus according to the present invention;

FIG. 3 is a top view of the protective cover of the forced cooling apparatus of the present invention;

FIG. 4 is a diagram of a cooling plate structure of the forced cooling apparatus of the present invention;

FIG. 5 is a top view of a cooling plate of the forced cooling apparatus of the present invention;

FIG. 6 is a top view of a finned heat sink of the forced cooling apparatus of the present invention;

FIG. 7 is a view showing a structure of a heat radiation water tank of the forced cooling apparatus of the present invention;

FIG. 8 is a front view of a radiator tank of the forced cooling apparatus of the present invention;

FIG. 9 is a view showing a structure of a jig of the forced cooling apparatus according to the present invention;

fig. 10 is a front view of a jig of the forced cooling apparatus of the present invention.

In the figure, 1, a cooling plate; 2. a clamp; 3. a protective cover; 4. a heat radiation water tank; 5. a fin-type heat sink; 61. fastening a bolt; 62. a threaded hole a; 63. a threaded hole b; 64. a threaded hole d; 7. a square hole; 8. a side notch; 91. a fastener; 92. a fixing hole a;9-1, a fixing part of the clamp; 9-2, a clamping part of the clamp; 10. a cooling water inlet channel of the cooling disc; 11. a cooling water outlet passage of the cooling pan; 12. a fixing hole b; 13. an external cooling water channel; 14. cooling the water channel internally; 15. a gap between the cooling water channels; 16. a hollow cylinder; 17. a heat sink; 17-1, a heat sink body; 17-2; a branch-shaped heat sink; 18. a cooling water inlet channel of the heat dissipation water tank; 19. a cooling water outlet channel of the heat dissipation water tank; 20. a workpiece groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention. The relative arrangement of the components and steps, expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations).

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, for the purpose of convenience of description, the vertical direction, the transverse direction and the longitudinal direction are perpendicular to each other, and the two directions in the vertical direction are up and down directions respectively.

As shown in fig. 1 to 10, the laser cladding cooling device with fin-shaped cooling fins of the present invention includes a protection cover, a cooling plate for a workpiece capable of dissipating heat, a fixture, and a cooling water tank. The protective cover, the clamp and the heat dissipation water tank are made of stainless steel, and the workpiece cooling disc capable of dissipating heat is made of pure copper.

The heat dissipation water tank is of a cylindrical structure with one end open and the other end closed; a water tank cooling water inlet channel and a water tank cooling water outlet channel are arranged on the side wall of the heat dissipation water tank;

the cooling disc comprises a disc-shaped body and fin-type cooling fins; the disc-shaped body is arranged at the open end of the heat dissipation water tank, the front surface of the disc-shaped body is provided with a workpiece arrangement part at the middle position, two annular cooling water channels are concentrically arranged at the periphery of the workpiece arrangement part, a cooling disc cooling water inlet channel and a cooling disc cooling water outlet channel are respectively arranged in the disc-shaped body along the radial direction, and the back surface of the disc-shaped body is provided with the fin-type cooling fin; the fin type radiating fins are fixed with the center of the back surface of the disc-shaped body through a welding process.

The two annular cooling water channels are respectively an inner cooling water channel positioned on the inner side and an outer cooling water channel positioned on the outer side, the inlet side of the outer cooling water channel is communicated with the cooling water inlet channel of the cooling disc, and the outlet side of the outer cooling water channel is communicated with the cooling water outlet channel of the cooling disc; the inlet side of the inner cooling water channel is communicated with the inlet side of the outer cooling water channel through a connecting channel a, and the outlet side of the inner cooling water channel is communicated with the outlet side of the outer cooling water channel through a connecting channel b.

In order to facilitate the cooling water to flow in the heat dissipation water tank and improve the heat dissipation efficiency, the fin-type heat dissipation fins are integrally embedded in blind holes which are arranged in the heat dissipation water tank and are close to the bottom of the tank, and the structure of the fin-type heat dissipation fins is shown in fig. 6 and comprises a middle fixing part and heat dissipation fins which are uniformly arranged on the outer side of the middle fixing part; the radiating fin is a streamline fork-shaped component and comprises a radiating fin body and more than two branch-shaped radiating fins, wherein the two branch-shaped radiating fins are arranged in the attached drawing; each branch-shaped radiating fin is arranged at the tail end of the radiating fin body and is formed by branching along the length extending direction of the radiating fin body; one end of the middle fixing part is fixed to the back face of the disc-shaped body, and the other end of the middle fixing part is at a certain distance from the bottom of the heat dissipation water tank. The middle fixing part in the attached drawings is of a hollow cylindrical structure.

The protective cover is sealed at the open end of the heat dissipation water tank and is wrapped outside the disc-shaped body, a through hole a is formed in the middle of the protective cover, and notches are formed in the side surfaces of the protective cover at the positions of the cooling water inlet channel and the cooling water outlet channel of the cooling disc; the size of the notch is slightly larger than that of the cooling water inlet channel/cooling water outlet channel of the cooling disc at the corresponding position, so that the cooling water inlet channel and the cooling water outlet channel of the cooling disc are exposed and are in butt joint with an external cooling water conveying pipeline.

The protective cover, the disc-shaped body and the open end face of the heat dissipation water tank are connected into a whole through bolts assembled in the through threaded holes, and a sealing gasket is arranged at the joint for sealing.

The through hole a is opposite to the workpiece arranging part, the size of the through hole a is matched with that of the workpiece arranging part, and in addition, more than two clamps are uniformly arranged on the outer side of the protective cover along the circumferential direction of the through hole a; the cooperative work of the clamps can clamp and fix the workpiece arranged on the workpiece arranging part.

In order to facilitate cooling water to enter the heat dissipation water tank, the number of the water tank cooling water inlet channels and the water tank cooling water outlet channels is 2; the 2 water tank cooling water inlet channels are respectively a water tank cooling water inlet channel a and a water tank cooling water inlet channel b; the 2 water tank cooling water outlet channels are respectively a water tank cooling water outlet channel a and a water tank cooling water outlet channel b; the water tank cooling water outlet channel a and the water tank cooling water outlet channel b are symmetrically arranged on the side wall of the heat dissipation water tank close to the bottom of the tank; the water tank cooling water inlet channel a and the water tank cooling water inlet channel b are symmetrically arranged on the side wall of the radiating water tank close to the open end.

In order to facilitate that cooling water entering the disc-shaped body can rapidly and synchronously flow into the inner cooling water channel and the outer cooling water channel, the connecting channels a and b are gaps among the cooling water channels arranged on the partition wall between the inner cooling water channel and the outer cooling water channel.

The workpiece is generally rectangular, so the workpiece groove is arranged to be rectangular, the inner cooling water channel and the outer cooling water channel are both arranged to be rectangular, and the through hole a is also arranged to be rectangular. Meanwhile, the number of the clamps is 4, and the clamps are arranged at the corner positions of the through holes a in a one-to-one correspondence manner; the clamp comprises a fixing part and a clamping part; the fixing part is integrally flat and penetrates through the protective cover through the fastening part to be fixed on the partition wall between the inner cooling water channel and the outer cooling water channel; the holding portion is raised from the flat plate-like fixed portion and has a flange shape.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Examples

The invention provides an omnibearing and efficient forced cooling device for laser cladding a substrate, the overall structure of which is shown in figure 1, and the cooling device comprises a cooling disc 1, a clamp 2, a protective cover 3, a heat radiation water tank 4 and fin type heat radiation fins 5. The protective cover 3 is connected with the cooling disc 1 and the heat dissipation water tank 4 through threads, and a sealing gasket is arranged at the joint; the fin type heat sink 4 is connected to the bottom center of the cooling pan 1 by a welding process. The size of a square hole 7 formed in the center of the protective cover 3 main body is the same as that of the substrate, and a side notch 8 slightly larger than the cooling water inlet channel 10 and the cooling water inlet channel 11 is formed in the side surface; threaded holes d12 are formed in four corners of the square hole 7, so that a fastening bolt 61 can conveniently penetrate through the square hole 7 to install the clamp 2, and threaded holes a62 are formed in the protective covers 3 on the left side and the right side of the square hole 7 to connect the cooling disc 1 and the heat dissipation water tank 4 through the fastening bolt 61; a square workpiece groove 20 is formed in the center of a main body of the cooling disc 1, the size of the square workpiece groove is the same as that of a base plate, two round-angle rectangular cooling water channels, namely an outer cooling water channel 13 and an inner cooling water channel 14, are formed in the outer side of the workpiece groove 20, a gap 15 between the cooling water channels is formed in the partition wall of the outer cooling water channel 13 and the inner cooling water channel 14 so as to be connected with each other, a cooling water inlet channel 10 and a cooling water outlet channel 11 are formed in the side surface of the cooling disc 1, fixing holes b12 are formed in four corners between the two cooling water channels, and the center line of each fixing hole b12 is superposed with the center line of a92 of a fixing hole formed in the corresponding position of the protective cover 3; the fixture is fixed by a fastener 91 which sequentially passes through a fixing part 9-1, a fixing hole a92 and a fixing hole b12 of the fixture. Threaded holes b63 are formed in the left side and the right side of the workpiece groove 20, so that the fastening bolts 61 can conveniently penetrate through and be connected with the heat dissipation water tank 4; the through holes on the two sides of the upper part of the heat radiation water tank 4 are cooling water inlet channels 18, the through holes on the two sides of the lower part are cooling water outlet channels 19, and the left side and the right side of the upper part of the heat radiation water tank 4 are provided with threaded holes d64 for connecting a protective cover and a cooling disc. In summary, the threaded holes a62, the threaded holes b63 and the threaded holes d64 are in one-to-one correspondence, and form through threaded holes, so that the fastening bolts can be conveniently installed, and the protective cover 3, the cooling disc 1 and the heat radiation water tank 4 are connected into a whole.

The following detailed description of the specific implementation and functions of the components that make up the present invention follows:

before laser cladding, a substrate is placed in a workpiece groove 20 in the center of a main body of a cooling disc 1, a protective cover 3 is covered, a sealing gasket is added at the joint, and the substrate is clamped by a clamp 2 and cannot move, so that the cladding quality is ensured; there is no particular limitation on the screw hole 6 on the protective cover 3; the threaded hole 12 of the mounting fixture is not particularly limited and can be selected according to the thickness of the cooling water channel 13, and the depth of the threaded hole 12 cannot exceed the thickness of the cooling disc 1; the outer cooling water channel around the workpiece groove is filled with cooling water (0 ℃ tap water can be selected) 13.

The middle of the fin-type radiating fin 5 is a hollow cylinder 16, and 24 radiating fins 17 are distributed in the circumferential direction at equal angular intervals; the fin type cooling fins 5 are connected with the bottom of the cooling disc 1 through a welding process, the fin type cooling fins 5 are inserted into the cooling water tank 4 before cladding, cooling water is introduced, the cooling fins 17 are in contact with flowing cooling water, the surface area of the cooling fins 17 is large, heat dissipation and cooling are facilitated, and the outer diameter of the fin type cooling fins 5 in the example is slightly larger than the length of the substrate.

The heat dissipation water tank 4 is cylindrical, the center of the main body is a blind hole, the inner diameter of the blind hole is slightly larger than the outer diameter of the fin-type heat dissipation fin 5, and the depth of the blind hole is slightly larger than the height of the fin-type heat dissipation fin 5, and the main function of the heat dissipation water tank is to provide a cooling water inlet 18 and a cooling water outlet channel 19 which are matched with a heat dissipation structure; the positions and the sizes of the threaded holes 6 on the left side and the right side of the top of the heat dissipation water tank are strictly consistent with those of the threaded holes of the protective cover.

The installation and cooling process of the invention comprises the following steps:

the fin-type cooling fins 5 are connected with the cooling disc 1 through welding, and are inserted into the cooling water tank 4 after being connected, and the protective cover 3 is arranged on the upper portion of the cooling disc 1; the protective cover 3, the cooling disc 1 and the heat dissipation water tank 4 are connected through threads 6, a sealing gasket is arranged at the joint, and a sealing gasket is arranged between the protective cover 3 and the cooling water tank of the cooling disc 1 to prevent cooling water from overflowing; an inlet 10 and an outlet 11 of cooling water on the side surface of the cooling disc 1 are provided with a connector and a water pipe and are connected with a refrigeration water tank.

Before laser cladding, a substrate is placed in a workpiece groove 20 of a cooling disc 1, a clamp 2 is installed through a threaded hole 12 to fix the substrate, cooling water in the cooling disc 1 enters an outer cooling water channel 13 of the cooling disc through a channel inlet 10, then flows into an inner cooling water channel 14 through a gap 15 between the two cooling water channels, takes heat away after the cooling water is fully contacted with the side surface of the substrate, and flows out through a cooling water channel outlet 11; after the fin-type radiating fins 5 are inserted into the radiating water tank 4, cooling water enters the radiating water tank 4 through the channel inlet 18, fully contacts with the radiating fins 17 to take away heat, and flows out through the cooling water channel outlet 19; and (3) after the cooling water continuously flows in and out, cladding is started, the cooling water is continuously introduced in the whole processing process, and the cladding can be stopped after finishing.

Claims

1. The utility model provides a laser cladding cooling device with fin formula fin, its characterized in that, including work piece cooling disc, anchor clamps, the heat dissipation water tank that can dispel the heat, wherein: the heat dissipation water tank is of a cylindrical structure with one end open and the other end closed; a water tank cooling water inlet channel and a water tank cooling water outlet channel are arranged on the side wall of the heat dissipation water tank;

the protective cover is sealed at the open end of the radiating water tank and is wrapped outside the disc-shaped body, and a through hole a is formed in the middle of the protective cover;

the through hole a is opposite to the workpiece placing part, and more than two clamps are uniformly arranged on the outer side of the protective cover along the circumferential direction of the through hole a; the work piece arranged on the work piece arranging part can be clamped and fixed by the cooperative work of all the clamps;

the fin type radiating fins are integrally embedded in blind holes formed in the radiating water tank and close to the bottom of the tank, and comprise middle fixing parts and radiating fins which are uniformly arranged on the outer sides of the middle fixing parts and distributed in an annular array;

one end of the middle fixing part is fixed with the back of the disc-shaped body, and a certain distance is reserved between the other end of the middle fixing part and the bottom of the heat dissipation water tank, so that cooling water can circulate conveniently.

2. The laser cladding cooling device with fin heat sink as claimed in claim 1, wherein the fin has two branch fins at its end.

3. The laser cladding cooling device with fin type heat sink as claimed in claim 2, wherein the intermediate fixing portion is a hollow cylindrical structure.

4. The laser cladding cooling device with the fin type cooling fin as claimed in claim 2, wherein the number of the water tank cooling water inlet channels and the water tank cooling water outlet channels is 2;

the 2 water tank cooling water inlet channels are respectively a water tank cooling water inlet channel a and a water tank cooling water inlet channel b;

the 2 water tank cooling water outlet channels are respectively a water tank cooling water outlet channel a and a water tank cooling water outlet channel b;

5. The laser cladding cooling device with fin cooling fins of claim 2, wherein the connecting channels a and b are cooling water channel gaps arranged on a partition wall between the inner cooling water channel and the outer cooling water channel.

6. The laser cladding cooling apparatus with fin cooling fins of claim 1, wherein said workpiece placement portion is a workpiece slot.

7. The laser cladding cooling device with fin type cooling fins as claimed in claim 6, wherein the workpiece groove is rectangular, the inner cooling water channel and the outer cooling water channel are both rectangular, and the through hole a is also rectangular.

8. The laser cladding cooling device with the fin type heat sink as claimed in claim 7, wherein the number of the clamps is 4, and the clamps are arranged at the corner positions of the through holes a in a one-to-one correspondence manner;

the clamp comprises a fixing part and a clamping part; the fixing part is integrally flat and penetrates through the protective cover through the fastening part to be fixed on the partition wall between the inner cooling water channel and the outer cooling water channel; the holding portion is raised from the flat plate-like fixing portion and has a flange shape.