CN114059062A

CN114059062A - Laser cladding cooling and protecting device

Info

Publication number: CN114059062A
Application number: CN202111279693.9A
Authority: CN
Inventors: 曲作鹏; 王海军; 田欣利; 杨勇平
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-02-18
Anticipated expiration: 2041-10-29
Also published as: CN114059062B

Abstract

The invention discloses a laser cladding cooling and protecting device, which relates to the field of metallic material amorphous coatings and comprises a conveying mechanism, a cooling device and a protecting device, wherein the conveying mechanism comprises a rack, a conveying roller piece arranged on the rack and a power assembly arranged at the tail end of the rack, and the power assembly is used for driving the conveying roller piece to rotate so as to convey a laser cladding piece; according to the invention, the cooling assembly, the inert gas supply assembly and the semi-closed box body are assembled and arranged on the conveying mechanism, in the device, the cooling assembly and the inert gas supply assembly can work uninterruptedly at the same time, and when a laser cladding piece is cooled, a worker only needs to place the laser cladding piece to be cooled on the front end of the conveying roller piece, the conveying mechanism can automatically convey the laser cladding piece into the semi-closed box body for semi-closed cooling protection treatment, the whole operation process is simple and convenient, the continuity is good, and no waiting time exists, so that the efficiency of the cooling and protection process of the laser cladding piece is greatly improved.

Description

Laser cladding cooling and protecting device

Technical Field

The invention relates to the field of metallic material amorphous coatings, in particular to a laser cladding cooling and protecting device.

Background

The laser cladding is a process method which is characterized in that a selected coating material is placed on the surface of a clad matrix in different material adding modes, is subjected to laser irradiation to be simultaneously melted with a thin layer on the surface of the matrix, and is rapidly solidified to form a surface coating with extremely low dilution degree and metallurgical bonding with the matrix, so that the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical characteristics of the surface of a base layer are obviously improved. In the field of metal amorphous coatings, when an amorphous coating is manufactured by laser cladding, the manufactured amorphous coating has crystallization phenomenon due to the fact that a cladding part is too high in temperature and slow in cooling speed and is influenced by surrounding air.

At present, a device product for cooling and protecting a laser cladding part has been designed, for example, a laser cladding cooling and protecting device disclosed in patent document CN201721376156.5, which not only can use circulated water as a cooling liquid to effectively cool a metal plate for laser cladding, but also can completely remove oxygen in the cooling and protecting device by using pollution-free inert gas, i.e., argon gas, to provide an oxygen-free environment for laser cladding, and the cooling and protecting device for laser cladding has the following operation processes: putting the cladding piece in the center of the cooling and protecting device, switching on a power supply of a water pump to provide power for cooling water circulation, opening a valve of a liquid argon tank, waiting for one minute, discharging air in the cooling and protecting device, and carrying out laser cladding at the moment.

Thus, the following problems are reflected from the above-described operation process: the whole cooling and protecting process of the cladding part needs to reserve a certain time to wait for the cooling and protecting device to perform preparation work, the cladding part needs to be put into the preorder work in the center of the cooling and protecting device, and the follow-up operation of taking out the cladding part from the center of the cooling and protecting device in the later period, the whole operation process is relatively complex in content, the continuity is relatively poor, and further the efficiency of the cooling and protecting process of the cladding part is relatively low.

Disclosure of Invention

The invention provides a laser cladding cooling and protecting device which can well solve the technical problems of complicated overall cooling and protecting operation process, waiting time and poor consistency of a laser cladding part.

According to an aspect of the present invention, there is provided a laser cladding cooling and protecting apparatus, comprising:

the conveying mechanism comprises a rack, a conveying roller piece arranged on the rack and a power assembly arranged at the tail end of the rack, wherein the power assembly is used for driving the conveying roller piece to rotate so as to convey the laser cladding piece;

the semi-closed box body is fixedly arranged in the middle of the top of the conveying mechanism, the top of the semi-closed box body is provided with a plurality of air outflow holes, the bottoms of the front side and the rear side of the semi-closed box body are provided with reserved windows for the laser cladding piece to enter and exit, and the semi-closed box body is used for forming a semi-closed space in the middle of the top of the conveying mechanism so as to provide a semi-closed space for accommodating inert gas;

the cooling assembly is fixedly arranged at the middle position of the top of the conveying mechanism and is used for rapidly cooling the laser cladding part conveyed by the conveying mechanism;

the inert gas supply assembly is fixedly arranged at the bottom of the conveying mechanism and is used for continuously supplying inert gas into the semi-closed box body so as to exhaust the air in the semi-closed box body and further ensure the quality of the laser cladding part in the cooling process.

Further, carry roller spare including rotating the conveying roller of installing in frame top both sides and intermediate position, the conveying roller that is located frame top both sides is the equidistance and arranges, every the both ends of conveying roller all weld have circular separation blade, and the one end cover of its pivot is equipped with double sprocket, connects through chain drive between the double sprocket of two adjacent conveying rollers around.

Furthermore, the power assembly comprises a driving motor and a speed reducer, an output shaft of the driving motor is connected with an input shaft of the speed reducer through a coupling, a driving chain wheel is sleeved at the output end of the speed reducer, and the driving chain wheel is in transmission connection with a double-row chain wheel of the tail end conveying roller through a driving chain.

Further, cooling module specifically has a set ofly, and the symmetry is installed in the both sides of intermediate position conveying roller, and every cooling module is including the coolant liquid bucket that holds the coolant liquid, the metal cooling plate is installed through the bracing piece at the top in the coolant liquid bucket, and fixed mounting has snakelike condenser tube in the metal cooling plate, and snakelike condenser tube's both ends all are located the outside of metal cooling plate, wherein one end of snakelike condenser tube is close to the coolant liquid bucket bottom surface and installs circulating water pump.

Further, the top surface of the metal cooling plate and the top surface of the conveying roller are at the same height.

Furthermore, the cooling assembly further comprises an air cooler, the air cooler is fixedly installed at the bottom of the rack, an air outlet end of the air cooler is connected with two groups of air supply hole pipes through an air conveying pipeline, and the two groups of air supply hole pipes are respectively inserted into the two cooling liquid storage barrels.

Furthermore, a one-way valve for preventing the cooling liquid from flowing back is sleeved on the air delivery pipeline.

Further, the inert gas supply assembly comprises an inert gas storage tank, the inert gas storage tank is fixedly mounted at the bottom of the rack, an air outlet end of the inert gas storage tank is communicated with the semi-closed box body through a gas transmission pipeline, and an electromagnetic valve used for adjusting output flow is sleeved on the gas transmission pipeline.

Furthermore, the outer sides of the two reserved windows are respectively provided with an automatic switch mechanism and a photoelectric switch for controlling the automatic switch mechanism to work, and the two photoelectric switches are fixedly arranged on the rack.

Furthermore, the automatic switch mechanism comprises a closing door which is rotatably arranged above the outer side of the reserved window and used for closing the reserved window, and a power source used for driving the closing door to turn over.

The invention has the beneficial effects that:

according to the invention, the cooling assembly, the inert gas supply assembly and the semi-closed box body are assembled and arranged on the conveying mechanism, in the device, the cooling assembly and the inert gas supply assembly can work uninterruptedly at the same time, and when a laser cladding piece is cooled, a worker only needs to place the laser cladding piece to be cooled on the front end of the conveying roller piece, the conveying mechanism can automatically convey the laser cladding piece into the semi-closed box body for semi-closed cooling protection treatment, the whole operation process is simple and convenient, the continuity is good, and no waiting time exists, so that the efficiency of the cooling and protection process of the laser cladding piece is greatly improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of a semi-enclosed case according to an embodiment of the present invention;

FIG. 3 is a side view of a delivery mechanism of an embodiment of the present invention;

FIG. 4 is a schematic view of the internal structure of a cooling module according to an embodiment of the present invention;

fig. 5 is a schematic view of the internal structure of the metal cooling plate according to the embodiment of the present invention.

In the figure: 1. a frame; 2. a semi-closed box body; 3. a conveying roller; 4. a drive sprocket; 5. a speed reducer; 6. a drive motor; 7. a chain; 8. a power source; 9. a closing door; 10. a photoelectric switch; 11. a gas pipeline; 12. an electromagnetic valve; 13. an inert gas storage tank; 14. a coolant storage barrel; 15. an air supply hole pipe; 16. a wind delivery pipeline; 17. an air cooler; 18. an air outflow hole; 19. reserving a window; 20. a metal cooling plate; 21. a drive chain; 22. a circular baffle plate; 23. a water circulating pump; 24. a serpentine cooling water pipe; 25. double-row chain wheels.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

The embodiment provides a laser cladding cooling and protecting device, as shown in fig. 1 and 2, including:

the conveying mechanism comprises a rack 1, a conveying roller piece arranged on the rack 1 and a power assembly arranged at the tail end of the rack 1, wherein the power assembly is used for driving the conveying roller piece to rotate so as to convey the laser cladding piece;

a semi-closed box 2 fixedly mounted in the middle of the top of the conveying mechanism, the top of the semi-closed box being provided with a plurality of air outflow holes 18, and the bottoms of the front and rear sides being provided with reserved windows 19 for the laser cladding member to enter and exit, so as to form a semi-closed space in the middle of the top of the conveying mechanism, so as to provide a semi-closed space for containing inert gas;

an inert gas supply assembly fixedly arranged at the bottom of the conveying mechanism and used for continuously supplying inert gas into the semi-closed box body 2 so as to exhaust the air in the semi-closed box body 2, thereby ensuring the quality of the laser cladding part in the cooling process.

As an embodiment of the invention, the conveying roller part comprises conveying rollers 3 rotatably mounted at two sides and the middle position of the top of the frame 1, the conveying rollers 3 positioned at two sides of the top of the frame 1 are arranged at equal intervals, the two ends of each conveying roller 3 are welded with circular blocking pieces 22, one end of a rotating shaft of each conveying roller is sleeved with a double-row chain wheel 25, and the double-row chain wheels 25 of the front and the rear adjacent conveying rollers 3 are in transmission connection through a chain 7. The arrangement of the circular blocking pieces 22 at the two ends of the conveying roller 3 can effectively prevent the laser cladding part from sliding off from one end of the conveying roller 3; conveying rollers 3 on the frame 1 sequentially pass through conveying rollers 3 at the adjacent rear ends to drive the conveying rollers 3 at the adjacent front ends to rotate, so that all the conveying rollers 3 on the frame 1 can synchronously rotate at the same speed to finish the stable conveying operation of the laser cladding part.

In one embodiment of the present invention, the power assembly includes a driving motor 6 and a speed reducer 5, an output shaft of the driving motor 6 is connected to an input shaft of the speed reducer 5 through a coupling, a driving sprocket 4 is sleeved on an output end of the speed reducer 5, and the driving sprocket 4 is in transmission connection with a double sprocket 25 of the tail end conveying roller 3 through a driving chain 21.

As an embodiment of the present invention, as shown in fig. 2, 4 and 5, the cooling units are specifically provided in one group and symmetrically installed at both sides of the middle position conveying roller 3, each cooling unit includes a cooling liquid storage barrel 14 containing cooling liquid, a metal cooling plate 20 is installed at the top inside the cooling liquid storage barrel 14 through a support rod, a serpentine cooling water pipe 24 is fixedly installed inside the metal cooling plate 20, both ends of the serpentine cooling water pipe 24 are located outside the metal cooling plate 20, and one end of the serpentine cooling water pipe 24 is close to the inner bottom surface of the cooling liquid storage barrel 14 and is installed with a water circulating pump 23.

In the embodiment of the present invention, the metal cooling plate 20 is made of a metal or alloy material with good thermal conductivity and wear resistance, which can be selected from, but not limited to: aluminum-silicon alloy.

As one embodiment of the present invention, as shown in fig. 2, the top surface of the metal cooling plate 20 is at the same height as the top surface of the conveying roller 3. The top surface of the metal cooling plate 20 and the top surface of the conveying roller 3 are arranged to be at the same height, so that the top surface of the metal cooling plate 20 can be in good contact with the bottom surface of a laser cladding piece, and the cooling effect of the laser cladding piece is guaranteed.

As an embodiment of the present invention, as shown in fig. 2 and 4, the cooling assembly further includes an air cooler 17, the air cooler 17 is fixedly installed at the bottom of the rack 1, and an air outlet end of the air cooler 17 is connected to two sets of air supply hole pipes 15 through an air duct 16, and the two sets of air supply hole pipes 15 are respectively inserted into the two cooling liquid storage barrels 14. The air cooler 17 can produce cold wind to spout behind air feed hole pipe 15 is carried through defeated wind pipeline 16, thereby can accomplish and continuously refrigerate the coolant liquid in two coolant liquid buckets 14, with the coolant liquid of guarantee transport to snakelike condenser tube 24 in continuously be in the low temperature state, finally maintain metal cooling plate 20 and cool off the laser cladding piece with the best state.

As an embodiment of the present invention, as shown in fig. 1 and 2, a check valve for preventing the reverse flow of the cooling liquid is further installed on the air duct 16.

As an embodiment of the present invention, as shown in fig. 1 and 2, the inert gas supply assembly includes an inert gas storage tank 13, the inert gas storage tank 13 is fixedly installed at the bottom of the rack 1, and an outlet end of the inert gas storage tank is communicated with the semi-closed box 2 through a gas transmission pipeline 11, and the gas transmission pipeline 11 is sleeved with an electromagnetic valve 12 for adjusting an output flow. The solenoid valve 12 can adjust the output of inert gas per unit time in the gas line 11 in order to maintain the quantity of inert gas in the semi-closed tank 2 at a high level at all times.

It should be noted that, in order to facilitate the evacuation of the air in the semi-closed box 2, the density of the inert gas stored in the inert gas storage tank 13 needs to be greater than that of the air, and in the embodiment of the present invention, the inert gas may be, but is not limited to, argon.

As an embodiment of the present invention, as shown in fig. 1 and 2, an automatic switch mechanism and a photoelectric switch 10 for controlling the operation of the automatic switch mechanism are respectively installed on the outer sides of the two reserved windows 19, and both the photoelectric switches 10 are fixedly installed on the rack 1. Through installing automatic switch mechanism respectively in two the outside of reservation window 19, can be when the laser cladding spare is located semi-enclosed box 2 internal cooling, can seal two reservation windows 19 simultaneously, avoided the inert gas that density is greater than the air to run off from reservation window 19, and then cause the quick loss of inert gas.

As one embodiment of the present invention, as shown in fig. 1, the automatic opening and closing mechanism includes a closing door 9 rotatably installed above the outside of the reserved window 19 for closing the reserved window 19, and a power source 8 for driving the closing door 9 to turn.

It should be noted that, in the embodiment of the present invention, the power source 8 may be, but is not limited to, an air cylinder or an electric push rod.

When the power sources 8 of the two automatic switch mechanisms work: when the photoelectric switch 10 at the reserved window 19 at the left end detects the laser cladding piece conveyed by the conveying mechanism, the photoelectric switch 10 at the left end controls the power source 8 to work, and the power source 8 drives the closed door 9 to turn clockwise so that the laser cladding piece enters the semi-closed box 2; when the photoelectric switch 10 at the reserved window 19 at the left end cannot detect the laser cladding piece conveyed by the conveying mechanism, the photoelectric switch 10 at the left end controls the power source 8 to work again, the power source 8 drives the closed door 9 to turn over anticlockwise so as to drive the closed door 9 to close the reserved window 19 at the left end, and therefore inert gas with density higher than that of air is prevented from flowing away from the reserved window 19;

as automatic control of the automatic switch mechanism at the reserved window 19 at the right end, the two photoelectric switches 10 are also simultaneously connected with a timing switch, when the end time of the left-end photoelectric switch 10 controlling the power source 8 to drive the closed door 9 to turn anticlockwise reaches a set time (the process time of the whole laser cladding part in the semi-closed box body 2), the timing switch automatically controls the power source 8 of the right-end automatic switch mechanism to work, and the power source 8 drives the closed door 9 to turn anticlockwise, so that the cooled laser cladding part is discharged from the semi-closed box body 2; and when the photoelectric switch 10 at the reserved window 19 at the right end cannot detect the laser cladding piece conveyed by the conveying mechanism, the photoelectric switch 10 at the right end controls the power source 8 to work, and the power source 8 drives the closing door 9 to turn clockwise so as to drive the closing door 9 to close the reserved window 19 at the right end.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A laser cladding cooling and protecting device is characterized by comprising:

the conveying mechanism comprises a rack (1), a conveying roller piece arranged on the rack (1) and a power assembly arranged at the tail end of the rack (1), wherein the power assembly is used for driving the conveying roller piece to rotate so as to convey the laser cladding piece;

the semi-closed box body (2) is fixedly arranged in the middle of the top of the conveying mechanism, the top of the semi-closed box body is provided with a plurality of air outflow holes (18), the bottoms of the front side and the rear side are provided with reserved windows (19) for the laser cladding piece to enter and exit, and the semi-closed box body is used for forming a semi-closed space in the middle of the top of the conveying mechanism so as to provide a semi-closed space for accommodating inert gas;

the inert gas supply assembly is fixedly arranged at the bottom of the conveying mechanism and is used for continuously supplying inert gas into the semi-closed box body (2) so as to exhaust the air in the semi-closed box body (2) and further ensure the quality of the laser cladding part in the cooling process.

2. The laser cladding cooling and protecting device according to claim 1, wherein the conveying roller member comprises conveying rollers (3) rotatably mounted on two sides of the top of the rack (1) and at an intermediate position, the conveying rollers (3) on two sides of the top of the rack (1) are arranged at equal intervals, two ends of each conveying roller (3) are welded with circular blocking pieces (22), one end of a rotating shaft of each conveying roller is sleeved with a double-row sprocket (25), and the double-row sprockets (25) of two adjacent conveying rollers (3) are in transmission connection through a chain (7).

3. The laser cladding cooling and protecting device according to claim 1, wherein the power assembly comprises a driving motor (6) and a speed reducer (5), an output shaft of the driving motor (6) is connected with an input shaft of the speed reducer (5) through a coupler, a driving sprocket (4) is sleeved at an output end of the speed reducer (5), and the driving sprocket (4) is in transmission connection with a double-row sprocket (25) of the tail end conveying roller (3) through a driving chain (21).

4. The laser cladding cooling and protecting device according to claim 1, wherein the cooling assemblies are specifically in one group and symmetrically installed on two sides of the middle conveying roller (3), each cooling assembly comprises a cooling liquid storage barrel (14) containing cooling liquid, a metal cooling plate (20) is installed at the top of the cooling liquid storage barrel (14) through a supporting rod, a serpentine cooling water pipe (24) is fixedly installed in the metal cooling plate (20), two ends of the serpentine cooling water pipe (24) are located on the outer side of the metal cooling plate (20), and one end of the serpentine cooling water pipe (24) is close to the inner bottom surface of the cooling liquid storage barrel (14) and is provided with a circulating water pump (23).

5. Laser cladding cooling and protecting device according to claim 4, characterized in that the top surface of said metal cooling plate (20) is at the same height as the top surface of the conveyor roller (3).

6. The laser cladding cooling and protecting device according to claim 4, wherein the cooling assembly further comprises an air cooler (17), the air cooler (17) is fixedly installed at the bottom of the rack (1), an air outlet end of the air cooler is connected with two groups of air supply hole pipes (15) through an air conveying pipeline (16), and the two groups of air supply hole pipes (15) are respectively inserted into the two cooling liquid storage barrels (14).

7. The laser cladding cooling and protecting device according to claim 6, wherein a check valve for preventing backflow of cooling liquid is further sleeved on the air delivery pipe (16).

8. The laser cladding cooling and protecting device according to claim 1, wherein the inert gas supply assembly comprises an inert gas storage tank (13), the inert gas storage tank (13) is fixedly installed at the bottom of the rack (1), an air outlet end of the inert gas storage tank is communicated with the semi-closed box body (2) through an air conveying pipeline (11), and an electromagnetic valve (12) for adjusting output flow is further sleeved on the air conveying pipeline (11).

9. The laser cladding cooling and protecting device according to claim 1, wherein an automatic switch mechanism and a photoelectric switch (10) for controlling the automatic switch mechanism to operate are respectively installed at the outer sides of the two reserved windows (19), and both the two photoelectric switches (10) are fixedly installed on the rack (1).

10. Laser cladding cooling and protecting device according to claim 9, characterized in that said automatic switch mechanism comprises a closing door (9) rotatably mounted above the outside of the window (19) for closing the window (19), and a power source (8) for driving the closing door (9) to turn.