A laser additive powder laying plane height detection device

Abstract

The utility model relates to a kind of laser additive powder laying plane height detection devices, including powder laying table, powder laying table middle part is provided with powder laying area, and mobile mechanism is provided on powder laying table, and mobile mechanism is slidably connected with powder scraping component, and powder scraping component includes mounting plate, and the upper surface of mounting plate is fixedly provided with servo electric jar, and the free end of servo electric jar piston rod passing through mounting plate is connected with scraper seat, and scraper seat is fixedly connected with scraper body, and mounting plate side surface integrally extends with boss part, and the lower surface of boss part is provided with laser emitter and the laser receiver for receiving reflected laser signal, while completing powder laying in powder laying area, the thickness of powder laying is detected by the cooperation of laser emitter and laser receiver, according to parameter control servo electric jar work, the height of scraper body is adjusted, so as to adjust the thickness of powder scraping, avoid due to too thin or too thick, so as to affect forming quality, the device is applicable to industrial production, with very strong practicability.

Description

Technical Field

[0001] This utility model belongs to the technical field of laser additive manufacturing equipment, and in particular relates to a laser additive powder spreading plane height detection device. Background Technology

[0002] A patent titled "A Laser Additive Manufacturing Material Testing Device" (application number CN202220621418.4) is disclosed in the existing Chinese patent database. This device includes a testing platform, a feeding structure connected to the testing platform, a conveying mechanism mounted on one side of the testing platform (the conveying mechanism includes a base fixedly connected to the testing platform, a straight rod fixedly mounted on one side of the base, and a driving component connected to the straight rod), a weighing platform connected to the testing platform, and an abrasion mechanism connected to the testing platform. The abrasion mechanism includes a first motor fixedly connected to the testing platform, a rotating platform fixedly mounted at the output end of the first motor, a clamping structure fixedly mounted on one side of the rotating platform, a second motor connected to the rotating platform via a height adjustment structure, and a mounting sleeve fixedly mounted at the output end of the second motor, with a grinding head connected to the mounting sleeve. This invention utilizes the cooperation of the feeding structure, conveying mechanism, and abrasion mechanism to automatically and continuously perform abrasion testing on the material to be tested and obtain the average abrasion value, saving manpower.

[0003] In laser additive manufacturing, the powder thickness needs to be measured. Too thin a powder will result in excess energy, low efficiency, and surface defects; too thick a powder will result in insufficient energy, low density, and loose structure. Therefore, this paper aims to propose a laser additive powder spreading plane height detection device that can detect the powder thickness at the same time as the powder scraping is completed and make real-time adjustments based on the detected thickness parameters. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to detect the thickness of laser additive powder coating, and how to adjust the powder coating thickness after detection. In order to improve its shortcomings, this utility model provides a laser additive powder coating plane height detection device.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A laser additive manufacturing powder spreading plane height detection device includes a powder spreading table with a powder spreading area in the middle. A moving mechanism is provided on the powder spreading table, and a powder scraping component is slidably connected to the moving mechanism. The powder scraping component includes a mounting plate, a servo electric cylinder is fixedly mounted on the upper surface of the mounting plate, and a scraper seat is connected to the free end of the piston rod of the servo electric cylinder passing through the mounting plate. A scraper body is fixedly connected to the scraper seat. A protruding plate extends integrally from the side of the mounting plate, and a laser emitter and a laser receiver for receiving reflected laser signals are provided on the lower surface of the protruding plate.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: due to the cooperative arrangement of the moving mechanism and the powder scraping component, the thickness of the powder is detected by the cooperation of the laser emitter and the laser receiver while the powder spreading area is completed. The servo cylinder is controlled to work according to the parameters, and the vertical height of the scraper body is adjusted to adjust the thickness of the powder scraping, so as to avoid affecting the forming quality due to the thickness being too thin or too thick. This device is suitable for industrial production and has strong practicality.

[0008] As a preferred embodiment, the moving mechanism includes support seats spaced apart on the upper surface of the powder spreading platform, a ball screw between the two support seats, the length direction of the ball screw being consistent with the powder spreading direction, a screw nut seat sleeved on the ball screw, and a slide rail located on the upper surface of the powder spreading platform inside the ball screw, with a slider slidably connected to the slide rail. One side of the upper surface of the slider is connected to the upper surface of the screw nut seat via a connecting plate, and the other side is connected to the upper surface of the mounting plate. Two sets of ball screws and slide rails are symmetrically arranged around the central plane of the powder spreading platform, and the two sets of ball screws are driven by corresponding reducers.

[0009] As a preferred embodiment, limit baffles are provided on the powder spreading platforms located at both free ends of the slide rail.

[0010] As a preferred embodiment, the scraper body includes a handle and a blade body, and the handle is fixed to the scraper seat by bolts.

[0011] As a preferred embodiment, a guide block is fixedly connected to the lower surface of the mounting plate, and a sliding groove is provided on the side of the guide block. Both sides of the scraper seat are provided with sliding protrusions that cooperate with the sliding groove. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the powder scraping component in this utility model.

[0014] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle.

[0015] In the diagram: 1. Powder spreading table, 2. Powder spreading area, 3. Moving mechanism, 4. Mounting plate, 5. Servo electric cylinder, 6. Scraper holder, 7. Scraper body, 701. Handle, 702. Scraper body, 8. Protruding plate, 9. Laser emitter, 10. Laser receiver, 11. Support base, 12. Ball screw, 13. Screw nut seat, 14. Slide rail, 15. Slider, 16. Connecting plate, 17. Reducer, 18. Limit baffle, 19. Guide block, 20. Sliding protrusion. Detailed Implementation

[0016] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1-3 As shown, a laser additive powder spreading plane height detection device includes a powder spreading table 1, a powder spreading area 2 in the middle of the powder spreading table 1, a moving mechanism 3 on the powder spreading table 1, a powder scraping component slidably connected to the moving mechanism 3, the powder scraping component including a mounting plate 4, a servo electric cylinder 5 fixedly mounted on the upper surface of the mounting plate 4, a scraper seat 6 connected to the free end of the piston rod of the servo electric cylinder 5 passing through the mounting plate 4, a scraper body 7 fixedly connected to the scraper seat 6, a protruding plate portion 8 integrally extended from the side of the mounting plate 4, a laser emitter 9 and a laser receiver 10 for receiving reflected laser signals are provided on the lower surface of the protruding plate portion 8. The moving mechanism 3 includes support seats 11 spaced apart on the upper surface of the powder spreading table 1. A ball screw 12 is arranged between the two support seats 11, with the length direction of the ball screw 12 aligned with the powder spreading direction. A screw nut seat 13 is sleeved on the ball screw 12. A slide rail 14 is also provided on the upper surface of the powder spreading table 1 inside the ball screw 12. A slider 15 is slidably connected to the slide rail 14. One side of the upper surface of the slider 15 is connected to the upper surface of the screw nut seat 13 via a connecting plate 16, and the other side is connected to the upper surface of the mounting plate 4. Two sets of ball screws 12 and slide rails 14 are symmetrically arranged around the central plane of the powder spreading table 1. The two sets of ball screws 12 are driven by corresponding reducers 17. Limit baffles 18 are provided on the powder spreading table 1 at both free ends of the slide rail 14. The scraper body 7 includes a handle 701 and a blade body 702. The handle 701 is fixed to the scraper seat 6 by bolts. A guide block 19 is fixedly attached to the lower surface of the mounting plate 4. A sliding groove is provided on the side of the guide block 19. Sliding protrusions 20 that cooperate with the sliding groove are provided on both sides of the scraper seat 6.

[0018] In operation, the operator first lays the powder in the powder-laying area 2, and controls two sets of reducers 17 to simultaneously drive the corresponding ball screws 12 to rotate. The ball screws 12 drive the screw nut seat 13 to move along the axial direction of the ball screws 12. The screw nut seat 13 moves as a unit with the slider 15 and the powder scraping component. The scraper body 7 in the powder scraping component scrapes the powder in the powder-laying area 2 to level it. At the same time, on the lower surface of the convex plate 8 located behind the scraper body 7 in the direction of movement, the laser emitter 9 emits a laser beam aimed at the leveled powder-laying height. The laser beam is perpendicular to the powder-laying surface. The laser beam is reflected to the laser receiver 10. The vertical height between the laser emission point and the powder-coated surface is calculated based on the time. Then, the vertical height between the laser emission point and the powder-coated area 2 before powder is applied is calculated. The difference is then used to determine the thickness of the powder coating. Based on the real-time measured powder coating thickness, the operator can control the servo cylinder 5 to move the scraper seat 6 vertically up and down through the cooperation of the sliding groove and the sliding protrusion 20, thereby adjusting the height of the scraper body 7 and changing the thickness of the powder coating to avoid the powder coating thickness being too thin or too thick, which would affect the product forming quality.

[0019] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A laser additive manufacturing powder spreading plane height detection device, comprising a powder spreading platform (1), wherein a powder spreading area (2) is provided in the middle of the powder spreading platform (1), characterized in that: The powder spreading table (1) is provided with a moving mechanism (3), and a powder scraping component is slidably connected to the moving mechanism (3). The powder scraping component includes a mounting plate (4), a servo electric cylinder (5) is fixedly provided on the upper surface of the mounting plate (4), and a scraper seat (6) is connected to the free end of the piston rod of the servo electric cylinder (5) passing through the mounting plate (4). A scraper body (7) is fixedly connected to the scraper seat (6). A protruding plate portion (8) extends integrally from the side of the mounting plate (4). A laser emitter (9) and a laser receiver (10) for receiving reflected laser signals are provided on the lower surface of the protruding plate portion (8).

2. The laser additive powder spreading plane height detection device according to claim 1, characterized in that: The moving mechanism (3) includes support seats (11) spaced apart on the upper surface of the powder spreading table (1). A ball screw (12) is provided between the two support seats (11). The length direction of the ball screw (12) is consistent with the powder spreading direction. A screw nut seat (13) is sleeved on the ball screw (12). A slide rail (14) is also provided on the upper surface of the powder spreading table (1) located inside the ball screw (12). A slider (15) is slidably connected on the slide rail (14). One side of the upper surface of the slider (15) is connected to the upper surface of the screw nut seat (13) via a connecting plate (16), and the other side is connected to the upper surface of the mounting plate (4). The ball screw (12) and the slide rail (14) are symmetrically arranged in two sets around the central plane of the powder spreading table (1). The two sets of ball screws (12) are driven by corresponding reducers (17).

3. The laser additive powder spreading plane height detection device according to claim 2, characterized in that: Limiting baffles (18) are provided on the powder spreading platform (1) located at both free ends of the slide rail (14).

4. The laser additive powder spreading plane height detection device according to claim 3, characterized in that: The scraper body (7) includes a handle (701) and a blade body (702), and the handle (701) is fixed to the scraper seat (6) by bolts.

5. A laser additive powder spreading plane height detection device according to any one of claims 1-4, characterized in that: A guide block (19) is fixedly attached to the lower surface of the mounting plate (4). A sliding groove is provided on the side of the guide block (19). Both sides of the scraper seat (6) are provided with sliding protrusions (20) that cooperate with the sliding groove.

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