A deep hole laser cladding device

Abstract

The present invention relates to the field of laser cladding technology, specifically, a deep hole laser cladding device. It comprises a laser generator, the lower side of the laser generator is rotatably connected with a center tube, a cladding shell is arranged on the outer side of the center tube, a plurality of spiral guide plates are arranged between the cladding shell and the center tube, and at least two feed channels and at least two air inlet channels are formed between adjacent guide plates; a cladding opening is provided at the lower end of the cladding shell, the lower end of the feed channel is connected with the lower end of the center tube, an annular ventilation cavity is provided on the outer side of the upper part of the feed nozzle, and a sealing plate is movably provided in the ventilation cavity. When the air inlet channel is ventilated, the sealing plate moves downward to connect the ventilation cavity with the cladding opening. The feeding rate of the cladding material is adjusted by rotating the center tube to avoid blockage of the cladding material, and the flow and cladding rate of the cladding material are adjusted by adjusting the rotation speed of the center tube and the air inlet rate in the air inlet channel, so as to realize the efficient deep hole cladding operation.

Description

Technical Field

[0001] The invention relates to the technical field of laser cladding, in particular to a deep hole laser cladding device. Background Art

[0002] Laser cladding feeding devices have been widely used in the field of metal surface coating. Traditional laser cladding technology requires that metal powder be evenly spread on the surface of the substrate to be coated through a feeding device, and then clad using a laser beam.

[0003] The general cladding structure can clad the metal surface, but it is not convenient to perform laser cladding on the inside of the deep hole structure, and a separate deep hole cladding device is required for the operation. The existing deep hole laser cladding head, such as the deep hole laser cladding head with Chinese patent publication number CN106835118B, the middle section of the cladding head includes a water pipe, an air pipe, a powder pipe, a wire pipe, multiple fixed skeletons, an inner thin-walled sleeve and an outer thin-walled sleeve. The fixed skeleton is annular and the main body of the fixed skeleton is provided with a first water hole, a first air hole, a first powder hole, and a first wire hole corresponding to the water pipe, the air pipe, the powder pipe, and the wire pipe, respectively. The water pipe, the air pipe, the powder pipe, and the wire pipe respectively pass through the first water hole, the first air hole, the first powder hole, and the first wire hole corresponding to the multiple fixed skeletons in sequence, the inner thin-walled sleeve passes through the inner holes of the multiple fixed skeletons in sequence, and the outer thin-walled sleeve is sleeved on the outer surface of the multiple fixed skeletons. The device can be applied to the inner hole cladding of pipes with an inner hole diameter of 100 to 200 mm and a diameter ratio greater than 40.

[0004] However, in this device, the cladding material is transported through a powder pipe, which makes it inconvenient to adjust the flow of the material, and thus the laser cladding efficiency cannot be adjusted; and due to the small pipe diameter, the cladding material is prone to blockage in the pipeline, affecting the deep hole cladding operation.

[0005] Therefore, the present application provides a deep hole laser cladding device to solve the problems in the prior art of easy material blockage and inconvenient adjustment of material flow efficiency and laser cladding efficiency during deep hole laser cladding operations. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a deep hole laser cladding device.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a deep hole laser cladding device, comprising a laser generator, the lower side of the laser generator is rotatably connected to a central tube, the outer side of the central tube is provided with a cladding shell, a plurality of spiral guide plates are provided between the cladding shell and the central tube, at least two feed channels and at least two air inlet channels are formed between adjacent guide plates, and the central tube can drive the material in the feed channel to move downward when rotating;

[0008] A cladding opening is provided at the lower end of the cladding shell, a feed nozzle is connected to the lower inner part of the cladding shell, a receiving tray is provided at the lower side of the feed nozzle, the lower end of the feed channel is connected with the lower end of the center tube, an annular ventilation cavity is provided at the outer upper part of the feed nozzle, the air inlet channel is connected with the ventilation cavity, a sealing plate is movably provided at the lower side of the ventilation cavity, and when the air inlet channel is ventilated, the sealing plate moves downward to connect the ventilation cavity with the cladding opening.

[0009] As an optimization, the guide plate is fixedly connected to the cladding shell, and the inner ring of the guide plate is in contact and sealed with the outer wall of the central tube;

[0010] A driving motor is fixed to the upper part of the cladding shell, an output shaft of the driving motor is connected to a driving gear, a connecting gear is provided at the upper part of the central tube, and the driving gear is meshed and connected with the connecting gear.

[0011] As an optimization, the two feed channels are symmetrically arranged, the upper end of the feed channel is connected to a feed hopper, and the upper end of the ventilation channel is connected to a ventilation pipe.

[0012] As an optimization, the lower end of the central tube is in contact and sealed with the upper end of the feed nozzle, a feed port is provided at the upper end of the feed nozzle, and the feed channel is connected with the interior of the feed nozzle through the feed port.

[0013] As an optimization, the bottom of the feed channel is sealed, and an air hole is provided between the bottom of the air inlet channel and the ventilation cavity;

[0014] The sealing plate is annular, and a limiting rod is connected to the upper side of the sealing plate. A limiting end plate is provided at the upper end of the limiting rod, and a supporting spring is provided at the upper part of the limiting rod. An air outlet is provided at the bottom of the ventilation cavity, and the sealing plate is tightly attached to the bottom surface of the air outlet under the action of the supporting spring.

[0015] As an optimization, the lower end of the feed nozzle is gathered to form a feed tip, the bottom of the feed tip is opened, and the feed nozzle is coaxially arranged with the center tube and the laser generator;

[0016] The axis of the receiving tray is sunken downwards, and an annular material discharge channel is formed between the receiving tray and the material discharge tip.

[0017] This scheme provides a deep hole laser cladding device, which has the following benefits:

[0018] The present application sets a cladding shell on the outside of the central tube, and adjusts the feeding rate of the cladding material by rotating the central tube to avoid blockage of the cladding material. The flow and cladding rate of the cladding material are adjusted by adjusting the rotation speed of the central tube and the air intake rate in the air intake channel, thereby realizing efficient deep hole cladding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axial schematic diagram of the present invention.

[0020] Figure 2 It is a main schematic diagram of the present invention.

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the AA section structure.

[0022] Figure 4 For the present invention Figure 2 Schematic diagram of the CC cross-section structure.

[0023] Figure 5 For the present invention Figure 3 Schematic diagram of the enlarged structure of part D.

[0024] Figure 6 It is a left side schematic diagram of the present invention.

[0025] Figure 7 For the present invention Figure 5 Schematic diagram of the BB cross-section structure.

[0026] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of part E.

[0027] Among them, 1. laser generator, 2. center tube, 3. cladding shell, 4. material guide plate, 5. feed channel, 6. air inlet channel, 7. feed nozzle, 8. receiving tray, 9. ventilation cavity, 10. sealing plate, 11. driving motor, 12. feed hopper, 13. ventilation pipe, 14. feed port, 15. air hole, 16. limit rod, 17. support spring. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] The present solution also includes a controller, the position of which is set by the staff according to actual conditions during operation. The controller is used to control the electrical devices used in the present solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, display screens, computer input devices, switch buttons, communication equipment, lights, speakers and microphones; the controller is an Intel processor, an AMD processor, a PLC controller, an ARM processor or a single-chip microcomputer, and the supporting components include a motherboard, a memory stick, a storage medium and a power supply, and the power supply is AC power or a lithium battery; when a display screen is provided, a display card is also provided.

[0030] like Figure 1-8 As shown, a deep hole laser cladding device comprises a laser generator 1, a central tube 2 is rotatably connected to the lower side of the laser generator 1, a cladding shell 3 is arranged on the outer side of the central tube 2, a plurality of spiral guide plates 4 are arranged between the cladding shell 3 and the central tube 2, at least two feed channels 5 and at least two air inlet channels 6 are formed between adjacent guide plates 4, and the central tube 2 can drive the material in the feed channel 5 to move downward when rotating;

[0031] A cladding opening is provided at the lower end of the cladding shell 3, a feed nozzle 7 is connected to the lower inner part of the cladding shell 3, a receiving plate 8 is provided on the lower side of the feed nozzle 7, the lower end of the feed channel 5 is connected to the lower end of the center tube 2, an annular ventilation cavity 9 is provided on the upper outer side of the feed nozzle 7, an air inlet channel 6 is connected to the ventilation cavity 9, a sealing plate 10 is movably provided on the ventilation cavity 9, and when the air inlet channel 6 is ventilated, the sealing plate 10 moves downward to connect the ventilation cavity 9 with the cladding opening.

[0032] The laser generator 1 is used to provide laser for the entire device. Correspondingly, the present application also includes various lenses used in conjunction with the laser generator 1, so that the laser can be emitted downward along the axis of the central tube 2, and the rotation of the central tube 2 does not affect the use of the laser generator 1. The cladding material is transported downward through the feed channel 5 and enters the inside of the feed nozzle 7, where it contacts the laser to achieve melting of the material.

[0033] like Figure 1 and Figure 3 As shown, the guide plate 4 is fixedly connected to the cladding shell 3, and the inner ring of the guide plate 4 is in contact and sealed with the outer wall of the central tube 2;

[0034] A driving motor 11 is fixed to the upper part of the cladding shell 3 , and a driving gear is connected to the output shaft of the driving motor 11 . A connecting gear is provided at the upper part of the central tube 2 , and the driving gear is meshed and connected with the connecting gear.

[0035] The driving motor 11 is used to drive the central tube 2 to rotate. When the central tube 2 rotates, it can drive the material in the feeding channel 5 to move spirally downward, which can effectively avoid material blockage. The material feeding speed can be adjusted by adjusting the speed of the driving motor 11.

[0036] The two feed channels 5 are symmetrically arranged, the upper end of each feed channel 5 is connected to a feed hopper 12 , and the upper end of each ventilation channel is connected to a ventilation pipe 13 .

[0037] like Figure 7 As shown, the lower end of the central tube 2 is in contact and sealed with the upper end of the feed nozzle 7 , a feed port 14 is provided at the upper end of the feed nozzle 7 , and the feed channel 5 is connected with the interior of the feed nozzle 7 through the feed port 14 .

[0038] The feed nozzle 7 is fixedly arranged with the cladding shell 3, so the relationship between the feed channel 5 and the feed nozzle 7 is fixed, and the central tube 2 rotates to continuously drive the material downward into the feed nozzle 7. Figure 7 As shown, the two feed ports 14 are arranged opposite to each other, so that the materials rushing out can contact the laser beam in the central tube 2 efficiently.

[0039] like Figure 5 As shown, the bottom of the feed channel 5 is sealed, and an air hole 15 is provided between the bottom of the air inlet channel 6 and the ventilation cavity 9;

[0040] The sealing plate 10 is annular, and a limiting rod 16 is connected to the upper side of the sealing plate 10. A limiting end plate is provided at the upper end of the limiting rod 16. A supporting spring 17 is provided at the upper part of the limiting rod 16. An air outlet 15 is provided at the bottom of the ventilation cavity 9. Under the action of the supporting spring 17, the sealing plate 10 is tightly attached to the bottom surface of the air outlet 15.

[0041] The air is ventilated into the air inlet channel 6 through the air inlet pipe, and the gas passes through the air inlet channel 6 and the air hole 15 into the air vent cavity 9. Under the action of air pressure, the sealing plate 10 is pushed to separate from the bottom of the air vent cavity 9, and the gas enters between the cladding shell 3 and the feed nozzle 7;

[0042] When the material is melted under the action of the laser beam and flows downward from the receiving tray 8, the gas can push the molten material to flow out through the bottom opening of the cladding shell 3 to perform a deep hole cladding operation.

[0043] like Figure 3 As shown, the lower end of the feed nozzle 7 is gathered to form a feed tip, the bottom of the feed tip is opened, and the feed nozzle 7 is coaxially arranged with the center tube 2 and the laser generator 1;

[0044] The axis of the receiving tray 8 is sunken downward, and an annular discharge channel is formed between the receiving tray 8 and the discharge tip.

[0045] Directions:

[0046] When the device is used, the material is fed into the feed channel 5 through the feed hopper 12, and the laser generator 1 is operated to emit a laser beam in the axial direction of the central tube 2;

[0047] The driving motor 11 is driven to rotate the central tube 2. Under the action of friction, the central tube 2 drives the powdery material in the feeding channel 5 to move downward until it enters the feeding nozzle 7 through the feeding port 14 and melts after contacting the laser beam.

[0048] High-temperature gas is introduced into the air inlet channel 6 through the air inlet channel 13, and the gas enters the air cavity 9 through the air inlet channel 6. Under the maximum air pressure, the sealing plate 10 is pushed to separate from the bottom surface of the air cavity 9, and the gas enters between the feed nozzle 7 and the laser generator 1;

[0049] The molten material flows outwards between the receiving plate 8 and the discharge nozzle 7, and is evenly accumulated on the inner side of the bottom outlet of the cladding shell 3, and can flow outwards under the action of air pressure, thereby realizing deep hole cladding operation.

[0050] By adjusting the rotation speed of the driving motor 11 or adjusting the internal air pressure of the air inlet channel 6, the feed speed of the cladding material and the discharge speed of the molten material can be adjusted, thereby achieving adjustable operation of the cladding efficiency during the cladding process. At the same time, it can effectively avoid the blockage of powdery materials inside the feed channel 5, thereby ensuring the efficient operation of the device.

[0051] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any deep hole laser cladding device that conforms to the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in any corresponding technical field shall fall within the patent protection scope of the present invention.

Claims

1. A deep hole laser cladding device, comprising a laser generator (1), characterized in that: The lower side of the laser generator (1) is rotatably connected to a central tube (2), the outer side of the central tube (2) is provided with a cladding shell (3), a plurality of spiral guide plates (4) are provided between the cladding shell (3) and the central tube (2), at least two feed channels (5) and at least two air inlet channels (6) are formed between adjacent guide plates (4), and the central tube (2) can drive the material in the feed channel (5) to move downward when rotating; A cladding opening is provided at the lower end of the cladding shell (3), a feed nozzle (7) is connected to the lower inner part of the cladding shell (3), a receiving plate (8) is provided at the lower side of the feed nozzle (7), the lower end of the feed channel (5) is connected to the lower end of the center tube (2), an annular ventilation cavity (9) is provided at the upper outer side of the feed nozzle (7), the air inlet channel (6) is connected to the ventilation cavity (9), a sealing plate (10) is movably provided at the ventilation cavity (9), and when the air inlet channel (6) is ventilated, the sealing plate (10) moves downward to allow the ventilation cavity (9) to be connected to the cladding opening; The lower end of the feed nozzle (7) is gathered to form a feed tip, the bottom of the feed tip is opened, and the feed nozzle (7) is coaxially arranged with the central tube (2) and the laser generator (1); The axis of the receiving plate (8) is recessed downwards, and an annular material discharge channel is formed between the receiving plate (8) and the material discharge tip.

2. A deep hole laser cladding device according to claim 1, characterized in that: The guide plate (4) is fixedly connected to the cladding shell (3), and the inner ring of the guide plate (4) is in contact and sealed with the outer wall of the central tube (2); A driving motor (11) is fixed to the upper part of the cladding shell (3), the output shaft of the driving motor (11) is connected to a driving gear, and a connecting gear is provided on the upper part of the central tube (2), and the driving gear is meshed and connected with the connecting gear.

3. The deep hole laser cladding device according to claim 1, characterized in that: The two feed channels (5) are symmetrically arranged, the upper ends of the feed channels (5) are connected to a feed hopper (12), and the upper ends of the ventilation channels are connected to a ventilation pipe (13).

4. The deep hole laser cladding device according to claim 1, characterized in that: The lower end of the central tube (2) is in contact and sealed with the upper end of the feed nozzle (7), a feed port (14) is provided at the upper end of the feed nozzle (7), and the feed channel (5) is connected to the interior of the feed nozzle (7) through the feed port (14).

5. The deep hole laser cladding device according to claim 1, characterized in that: The bottom of the feed channel (5) is sealed, and an air hole (15) is provided between the bottom of the air inlet channel (6) and the ventilation cavity (9); The sealing plate (10) is annular, and the upper side of the sealing plate (10) is connected to a limiting rod (16), the upper end of the limiting rod (16) is provided with a limiting end plate, the upper part of the limiting rod (16) is provided with a supporting spring (17), and the bottom of the ventilation cavity (9) is provided with an air outlet (15), and the sealing plate (10) is tightly attached to the bottom surface of the air outlet (15) under the action of the supporting spring (17).

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