Internal defect detection device for LPBF printed piece

Abstract

The invention discloses an LPBF printed piece internal defect detection device which comprises a defect detection device body, detection heads are installed on the surfaces, close to the upper ends, of the two ends in the defect detection device body, a box door is rotationally connected to the front surface of the defect detection device body, and a transparent observation window is arranged on the front surface of the box door. A handle is fixedly mounted at the position, close to the other end, of the front surface of the box door, an adjusting structure is arranged on the bottom face in the defect detection device body, and a lifting structure is arranged on the adjusting structure; the adjusting structure comprises a circular mounting groove, a first servo motor, a rotating shaft, a transmission gear, an annular sliding groove, an annular sliding block, a tooth groove, a first bearing, a rotating rod and a lifting base. According to the internal defect detection device for the LPBF printed piece, a worker does not need to manually rotate the printed piece for detection, the height of the printed piece can be adjusted, and the printed piece can be conveniently detected.

Description

Technical Field

[0001] The present invention relates to the technical field of LPBF print defect detection, and in particular to a device for detecting internal defects of LPBF prints. Background Art

[0002] LPBF prints refer to metal parts printed by laser powder bed fusion (LPBF) technology. LPBF is an additive manufacturing technology that uses a laser beam to melt metal powder layer by layer and accumulate layer by layer to form three-dimensional solid parts. This technology has high molding accuracy, is suitable for manufacturing complex metal components, and can reduce material waste. It can print parts with complex geometric shapes, with high dimensional accuracy and good surface quality. Compared with traditional manufacturing methods, LPBF technology can minimize material waste because only the required metal powder is used without the need for additional support structures. Transient phenomena and complex structural dynamics are triggered in extreme thermal conditions. The interaction between them often leads to structural defects, such as pores. Therefore, after the LPBF print is printed, it is necessary to perform defect detection on the inside; however, the defect detection device currently used is fixed when the printer is inspected, and the staff needs to manually rotate the print for inspection, and the height of the print cannot be adjusted. Summary of the invention

[0003] The main purpose of the present invention is to provide a device for detecting internal defects of LPBF prints, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A device for detecting internal defects of LPBF printed parts comprises a defect detection device body, detection heads are installed on both end surfaces of the defect detection device body near the upper end, a box door is rotatably connected to the front surface of the defect detection device body, a transparent observation window is provided on the front surface of the box door, a handle is fixedly installed on the front surface of the box door near the other end, an adjustment structure is provided on the bottom surface of the defect detection device body, a lifting structure is provided on the adjustment structure, and the adjustment structure comprises a circular mounting groove, a No. 1 servo motor, a rotating shaft, a transmission gear, an annular slide groove, an annular slider, a tooth groove, a No. 1 bearing, a rotating rod, and a lifting seat.

[0006] Preferably, a No. 1 bearing is fixedly installed in the middle of the bottom surface of the defect detection device body, a No. 1 bearing is fixedly installed at the lower end of the outer surface of the rotating rod, a lifting seat is fixedly installed on the upper surface of the rotating rod, and an annular slider is fixedly installed on the lower surface of the lifting seat.

[0007] Preferably, an annular groove is provided on the inner bottom surface of the defect detection device body, an annular slider is slidably installed in the annular groove, a circular installation groove is provided at the other end of the annular groove on the inner bottom surface of the defect detection device body, and a servo motor No. 1 is installed in the circular installation groove.

[0008] Preferably, the rotating part of the No. 1 servo motor is fixedly connected to a rotating shaft, a transmission gear is fixedly installed on the upper surface of the rotating shaft, a tooth groove is provided in a ring shape on the outer surface of the annular slider, and the tooth groove provided in a ring shape on the outer surface of the annular slider is meshed with the transmission gear.

[0009] Preferably, the lifting structure includes a rectangular slide, a rectangular lifting platform, a rectangular slider, a rectangular slot, a No. 2 servo motor, a movable rod, a No. 2 mounting seat, a No. 2 shaft rod, a No. 1 slide, a bidirectional threaded rod, a No. 1 mounting seat, a No. 2 shaft rod, a rectangular connecting plate, a rectangular connecting plate, a No. 2 bearing, and a circular inspection platform.

[0010] Preferably, a rectangular groove is provided on the upper surface of the lifting seat, a rectangular lifting platform is slidably installed in the rectangular groove, a No. 1 slide groove is provided on the lower surface of the rectangular groove, and No. 2 bearings are fixedly installed in the middle of the two end surfaces of the No. 1 slide groove, and No. 2 bearings are fixedly installed on the outer surface of the bidirectional threaded rod near both ends.

[0011] Preferably, a No. 2 servo motor is fixedly installed on the lower end of one end surface of the lifting seat, and a bidirectional threaded rod is fixedly connected to the rotating part of the No. 2 servo motor. Rectangular connecting plates are threadedly installed on the outer surface of the bidirectional threaded rod near both ends, and a rectangular connecting plate is fixedly installed on the upper surface of the rectangular connecting plate.

[0012] Preferably, a No. 1 mounting seat is fixedly installed on the upper surface of the rectangular connecting plate near the front and rear ends, a No. 2 shaft rod is movably installed on the No. 1 mounting seat, a movable rod is fixedly installed on the outer surface of the No. 2 shaft rod, and a No. 2 mounting seat is fixedly installed at both ends of the front and rear ends of the lower surface of the rectangular lifting platform.

[0013] Preferably, a No. 2 shaft rod is movably mounted on the No. 2 mounting seat, a movable rod is fixedly mounted on the outer surface of the No. 2 shaft rod, rectangular slide grooves are provided on both end surfaces of the rectangular groove, rectangular sliders are slidably mounted in the rectangular slide grooves, rectangular sliders are fixedly mounted on the lower ends of both end surfaces of the rectangular lifting platform, and a circular detection platform is fixedly mounted on the upper surface of the rectangular lifting platform.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Through the setting adjustment structure, when the printed part is tested, the No. 1 servo motor can be started to make the annular slider drive the lifting seat to rotate, so that the rotating rod fixedly installed in the middle of the lower surface of the lifting seat rotates in the No. 1 bearing, and the lifting structure set on the lifting seat rotates, thereby driving the printed part to rotate, and the staff does not need to manually rotate the printed part for testing.

[0016] 2. Through the provided lifting structure, when the height of the printed part needs to be adjusted, the No. 2 servo motor can be started to make the rectangular lifting platform drive the rectangular connecting plates fixedly installed at the lower ends of the two end surfaces to slide upward in the rectangular connecting plates, so that the rectangular lifting platform can slide upward in the rectangular groove, driving the circular detection platform fixedly installed on the upper surface of the rectangular lifting platform to move upward, thereby adjusting the height of the printed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a device for detecting internal defects of LPBF prints according to the present invention;

[0018] Figure 2 A cross-sectional view of a device for detecting internal defects of an LPBF printed part according to the present invention;

[0019] Figure 3 A partial cross-sectional view of a device for detecting internal defects of an LPBF printed part according to the present invention;

[0020] Figure 4 A device for detecting internal defects of LPBF printed parts according to the present invention Figure 2 Enlarged view of point A in the middle;

[0021] Figure 5 A device for detecting internal defects of LPBF printed parts according to the present invention Figure 2 Enlarged view of point B in the middle;

[0022] Figure 6 A device for detecting internal defects of LPBF printed parts according to the present invention Figure 3 Enlarged view of point C in the middle.

[0023] In the figure: 1. Defect detection device body; 2. Detection head; 3. Box door; 301. Handle; 4. Transparent observation window; 5. Adjustment structure; 501. Circular mounting groove; 502. No. 1 servo motor; 503. Rotating shaft; 504. Transmission gear; 505. Annular slide groove; 506. Annular slider; 507. Tooth groove; 508. No. 1 bearing; 509. Rotating rod; 510. Lifting seat; 6. Lifting structure; 601. Rectangular slide; 602, rectangular lifting platform; 603, rectangular slider; 604, rectangular slot; 605, No. 2 servo motor; 606, movable rod; 607, No. 2 mounting seat; 608, No. 2 shaft rod; 609, No. 1 slide; 610, bidirectional threaded rod; 611, No. 1 mounting seat; 612, No. 2 shaft rod; 613, rectangular connecting plate; 614, No. 1 slider; 615, No. 2 bearing; 616, circular inspection table. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] like Figure 1-6 As shown, a device for detecting internal defects of LPBF printed parts comprises a defect detection device body 1, detection heads 2 are installed near the upper end of both ends of the inner surface of the defect detection device body 1, a box door 3 is rotatably connected to the front surface of the defect detection device body 1, a transparent observation window 4 is arranged on the front surface of the box door 3, a handle 301 is fixedly installed near the other end of the front surface of the box door 3, an adjustment structure 5 is arranged on the bottom surface of the inner part of the defect detection device body 1, and a lifting structure 6 is arranged on the adjustment structure 5, and the adjustment structure 5 comprises a circular installation groove 501, a No. 1 servo motor 502, a rotating shaft 503, a transmission gear 504, an annular slide groove 505, an annular slider 506, a tooth groove 507, a No. 1 bearing 508, a rotating rod 509, and a lifting seat 510;

[0026] A bearing No. 1 508 is fixedly installed in the middle of the inner bottom surface of the defect detection device body 1, a bearing No. 1 508 is fixedly installed at the lower end of the outer surface of the rotating rod 509, a lifting seat 510 is fixedly installed on the upper surface of the rotating rod 509, and a ring-shaped slider 506 is fixedly installed on the lower surface of the lifting seat 510; an annular groove 505 is provided on the inner bottom surface of the defect detection device body 1, and an annular slider 506 is slidably installed in the annular groove 505, a circular installation groove 501 is provided at the other end of the annular groove 505 on the inner bottom surface of the defect detection device body 1, and a servo motor No. 1 502 is installed in the circular installation groove 501; the rotating part of the servo motor No. 1 502 is fixedly connected to the rotating shaft 503, and the rotating shaft 503 is fixedly connected to the rotating shaft 503. A transmission gear 504 is fixedly installed on the upper surface of the shaft 503, and a tooth groove 507 is provided in an annular shape on the outer surface of the annular slider 506. The tooth groove 507 provided in an annular shape on the outer surface of the annular slider 506 meshes with the transmission gear 504. When the printed piece is to be inspected, the No. 1 servo motor 502 can be started to make the annular slider 506 drive the lifting seat 510 to rotate, so that the rotating rod 509 fixedly installed in the middle part of the lower surface of the lifting seat 510 rotates in the No. 1 bearing 508, so that the lifting structure 6 set on the lifting seat 510 rotates, thereby driving the printed piece to rotate, and there is no need for the staff to manually rotate the printed piece for inspection; the lifting structure 6 includes a rectangular slide 601, a rectangular lifting platform 602, Rectangular slider 603, rectangular groove 604, No. 2 servo motor 605, movable rod 606, No. 2 mounting seat 607, No. 2 shaft rod 608, No. 1 slide groove 609, bidirectional threaded rod 610, No. 1 mounting seat 611, No. 2 shaft rod 612, rectangular connecting plate 613, rectangular connecting plate 614, No. 2 bearing 615, circular inspection platform 616; the upper surface of the lifting seat 510 is provided with a rectangular groove 604, and a rectangular lifting platform 602 is slidably installed in the rectangular groove 604, and a No. 1 slide groove 609 is provided on the lower surface of the rectangular groove 604, and the No. 2 bearing 615 is fixedly installed in the middle of the two end surfaces of the No. 1 slide groove 609, and the outer surface of the bidirectional threaded rod 610 is fixedly installed near both ends There is a No. 2 bearing 615; a No. 2 servo motor 605 is fixedly installed on the lower end of one end surface of the lifting seat 510, and a bidirectional threaded rod 610 is fixedly connected to the rotating part of the No. 2 servo motor 605. A rectangular connecting plate 614 is threadedly installed on the outer surface of the bidirectional threaded rod 610 near both ends, and a rectangular connecting plate 613 is fixedly installed on the upper surface of the rectangular connecting plate 614; a No. 1 mounting seat 611 is fixedly installed on the upper surface of the rectangular connecting plate 613 near the front and rear ends, and a No. 2 shaft rod 612 is movably installed on the No. 1 mounting seat 611, and a movable rod 606 is fixedly installed on the outer surface of the No. 2 shaft rod 612, and a No. 2 mounting seat 607 is fixedly installed on both ends of the front and rear ends of the lower surface of the rectangular lifting platform 602;A No. 2 shaft rod 608 is movably mounted on the No. 2 mounting seat 607, and a movable rod 606 is fixedly mounted on the outer surface of the No. 2 shaft rod 608. Rectangular slide grooves 601 are provided on both ends of the rectangular groove 604, and rectangular sliders 603 are slidably mounted in the rectangular slide grooves 601. Rectangular sliders 603 are fixedly mounted on the lower ends of both ends of the rectangular lifting platform 602, and a circular detection platform 616 is fixedly mounted on the upper surface of the rectangular lifting platform 602. When the height of the printed piece needs to be adjusted, the No. 2 servo motor 605 is started, so that the rectangular lifting platform 602 drives the rectangular connecting plates 614 fixedly mounted on the lower ends of both ends to slide upward in the rectangular connecting plates 613, so that the rectangular lifting platform 602 slides upward in the rectangular groove 604, and drives the circular detection platform 616 fixedly mounted on the upper surface of the rectangular lifting platform 602 to move upward, thereby adjusting the height of the printed piece. ;

[0027] It should be noted that the present invention is a device for detecting internal defects of LPBF printed parts. When the printed part needs to be inspected, the No. 1 servo motor 502 is started, so that the No. 1 servo motor 502 installed in the circular installation groove 501 drives the rotating shaft 503 to rotate, so that the transmission gear 504 fixedly installed on the upper surface of the rotating shaft 503 rotates. Because the tooth groove 507 provided in an annular shape on the outer surface of the annular slider 506 meshes with the transmission gear 504, the annular slider 506 is driven to slide in the annular slide groove 505, so that the annular slider 506 drives the lifting seat 510 to rotate, so that the rotating rod 509 fixedly installed in the middle part of the lower surface of the lifting seat 510 rotates in the No. 1 bearing 508, so that the lifting structure 6 set on the lifting seat 510 rotates, thereby driving the printed part to rotate, and there is no need for the staff to manually rotate the printed part for inspection. When the height of the printed part needs to be adjusted, the No. 2 servo motor 605 is started, so that the rotating part of the No. 2 servo motor 605 drives the double The threaded rod 610 rotates on the No. 2 bearing 615, so that the outer surface of the bidirectional threaded rod 610 near the rectangular connecting plate 614 with threads installed at both ends slides toward the middle in the No. 1 slide groove 609, so that the rectangular connecting plate 613 fixedly installed on the upper surface of the rectangular connecting plate 614 moves toward the middle, thereby driving the No. 1 mounting seat 611 fixedly installed on the upper surface of the rectangular connecting plate 613 near the front and rear ends to move toward the middle, so that the movable rod 606 drives the No. 2 shaft rod 612 to rotate on the No. 1 mounting seat 611, so that the movable rod 606 drives the No. 2 shaft rod 608 to rotate on the No. 2 mounting seat 607, and drives the No. 2 mounting seat 607 to move upward, so that the rectangular lifting platform 602 drives the rectangular connecting plate 614 fixedly installed at the lower ends of the two end surfaces to slide upward in the rectangular connecting plate 613, so that the rectangular lifting platform 602 slides upward in the rectangular groove 604, and drives the circular detection platform 616 fixedly installed on the upper surface of the rectangular lifting platform 602 to move upward, thereby adjusting the height of the printed part.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for detecting internal defects of LPBF printed parts, characterized in that: The invention comprises a defect detection device body (1), wherein detection heads (2) are installed on both ends of the inner surface of the defect detection device body (1) near the upper end, a box door (3) is rotatably connected to the front surface of the defect detection device body (1), a transparent observation window (4) is arranged on the front surface of the box door (3), a handle (301) is fixedly installed on the front surface of the box door (3) near the other end, an adjustment structure (5) is arranged on the inner bottom surface of the defect detection device body (1), and a lifting structure (6) is arranged on the adjustment structure (5), and the adjustment structure (5) comprises a circular installation groove (501), a No. 1 servo motor (502), a rotating shaft (503), a transmission gear (504), an annular slide groove (505), an annular slider (506), a tooth groove (507), a No. 1 bearing (508), a rotating rod (509), and a lifting seat (510).

2. The device for detecting internal defects of LPBF printed parts according to claim 1, characterized in that: A No. 1 bearing (508) is fixedly installed in the middle of the bottom surface of the defect detection device body (1), a No. 1 bearing (508) is fixedly installed at the lower end of the outer surface of the rotating rod (509), a lifting seat (510) is fixedly installed on the upper surface of the rotating rod (509), and an annular slider (506) is fixedly installed on the lower surface of the lifting seat (510).

3. The device for detecting internal defects of LPBF printed parts according to claim 2, characterized in that: An annular groove (505) is provided on the inner bottom surface of the defect detection device body (1), and an annular slider (506) is slidably installed in the annular groove (505). A circular installation groove (501) is provided at the other end of the annular groove (505) on the inner bottom surface of the defect detection device body (1), and a servo motor (502) is installed in the circular installation groove (501).

4. The device for detecting internal defects of LPBF printed parts according to claim 3, characterized in that: The rotating part of the No. 1 servo motor (502) is fixedly connected to a rotating shaft (503), a transmission gear (504) is fixedly installed on the upper surface of the rotating shaft (503), a tooth groove (507) is provided in a ring shape on the outer surface of the annular slider (506), and the tooth groove (507) provided in a ring shape on the outer surface of the annular slider (506) is meshed with the transmission gear (504).

5. The device for detecting internal defects of LPBF printed parts according to claim 4, characterized in that: The lifting structure (6) comprises a rectangular slide (601), a rectangular lifting platform (602), a rectangular slider (603), a rectangular slot (604), a No. 2 servo motor (605), a movable rod (606), a No. 2 mounting seat (607), a No. 2 shaft rod (608), a No. 1 slide (609), a bidirectional threaded rod (610), a No. 1 mounting seat (611), a No. 2 shaft rod (612), a rectangular connecting plate (613), a rectangular connecting plate (614), a No. 2 bearing (615), and a circular detection platform (616).

6. The device for detecting internal defects of LPBF printed parts according to claim 5, characterized in that: The upper surface of the lifting seat (510) is provided with a rectangular groove (604), a rectangular lifting platform (602) is slidably installed in the rectangular groove (604), a No. 1 slide groove (609) is provided on the lower surface of the rectangular groove (604), and No. 2 bearings (615) are fixedly installed in the middle of the two end surfaces of the No. 1 slide groove (609), and No. 2 bearings (615) are fixedly installed on the outer surface of the bidirectional threaded rod (610) near both ends.

7. The device for detecting internal defects of LPBF printed parts according to claim 6, characterized in that: A second servo motor (605) is fixedly mounted on the lower end of one end surface of the lifting seat (510); a bidirectional threaded rod (610) is fixedly connected to the rotating part of the second servo motor (605); rectangular connecting plates (614) are threadedly mounted on the outer surface of the bidirectional threaded rod (610) near both ends; a rectangular connecting plate (613) is fixedly mounted on the upper surface of the rectangular connecting plate (614).

8. The device for detecting internal defects of LPBF printed parts according to claim 7, characterized in that: A No. 1 mounting seat (611) is fixedly mounted on the upper surface of the rectangular connecting plate (613) near the front and rear ends, a No. 2 shaft rod (612) is movably mounted on the No. 1 mounting seat (611), a movable rod (606) is fixedly mounted on the outer surface of the No. 2 shaft rod (612), and a No. 2 mounting seat (607) is fixedly mounted on both ends of the front and rear ends of the lower surface of the rectangular lifting platform (602).

9. The device for detecting internal defects of LPBF printed parts according to claim 7, characterized in that: A No. 2 shaft rod (608) is movably mounted on the No. 2 mounting seat (607), a movable rod (606) is fixedly mounted on the outer surface of the No. 2 shaft rod (608), rectangular slide grooves (601) are provided on both end surfaces of the rectangular groove (604), a rectangular slider (603) is slidably mounted in the rectangular slide groove (601), rectangular sliders (603) are fixedly mounted on the lower ends of both end surfaces of the rectangular lifting platform (602), and a circular detection platform (616) is fixedly mounted on the upper surface of the rectangular lifting platform (602).

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