An auxiliary positioning structure based on a multi-laser SLM printer

Abstract

The present invention discloses an auxiliary positioning structure based on a multi-laser SLM printer, which includes a support frame. A powder cylinder is provided on the upper surface of the support frame. A printer body is fixed on one side of the powder cylinder on the upper surface of the support frame. A laser lens is provided on the lower surface of the printer body. A vertical plate is fixedly connected to the upper surface of the support frame. A square through groove is provided on the vertical plate. A housing is fixedly connected to the side wall of the square through groove. A dust removal device is provided in the housing, and the dust removal device is used to clean the laser lens; by providing the dust removal device, dust removal treatment is carried out on the laser lens, avoiding the influence of dust on the laser lens on the laser landing point, resulting in a positioning error of the laser printing starting point and affecting the workpiece forming. It is beneficial to improve the cleanliness of the laser lens, increase the penetration of the laser lens, and make the laser landing point more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of printer positioning, and specifically to an auxiliary positioning structure based on a multi-laser SLM printer. Background Art

[0002] SLM: Selective Laser Melting, which is a main technical approach in additive manufacturing of metal materials. This technology uses a laser as an energy source and scans layer by layer on a metal powder bed according to the path planned in a three-dimensional CAD slice model. The scanned metal powder is melted and solidified to achieve the effect of metallurgical bonding, and finally a metal part designed by the model is obtained.

[0003] When the printer is printing, it performs laser printing according to the slice picture. The printer determines the printing starting point according to the slice picture. The laser passes through the lens and lands in the powder cylinder to start printing. During printing, smoke particles are generated. The smoke particles will rise and stick to the upper laser lens, resulting in insufficient cleanliness of the laser lens. When the laser passes through, it causes deviation, and the laser cannot accurately locate the starting point determined by the printer, resulting in deviation of the printed model. Summary of the Invention

[0004] The purpose of the present invention is to provide an auxiliary positioning structure based on a multi-laser SLM printer for the deficiencies of the prior art to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An auxiliary positioning structure based on a multi-laser SLM printer, including a support frame. A powder cylinder is provided on the upper surface of the support frame. A printer body is fixed on one side of the powder cylinder on the upper surface of the support frame. A laser lens is provided on the lower surface of the printer body. A vertical plate is fixedly connected to the upper surface of the support frame. A square through groove is provided on the vertical plate. A housing is fixedly connected to the side wall of the square through groove. A dust removal device is provided in the housing, and the dust removal device is used to clean the laser lens.

[0007] As a preferred solution of the present invention, a sliding groove is provided on one side of the housing. The sliding groove penetrates through the housing. A sliding block is slidably connected in the sliding groove. One side of the sliding block is fixedly connected to an electric push rod. The telescopic rod of the electric push rod penetrates through the sliding block. A first spring is fixedly connected between the sliding block and the sliding groove. The dust removal device is located on one side of the telescopic rod of the electric push rod.

[0008] As a preferred embodiment of the present invention, the dust removal device includes a horizontal plate fixedly connected to the telescopic rod of the electric push rod. A circular through groove is fixedly connected to the upper surface of the horizontal plate, and a cleaning cylinder is fixedly connected to the inner wall of the circular through groove. An ultrasonic generating device is provided on the lower surface of the cleaning cylinder, and a folding rubber sleeve is fixedly connected to the upper end of the cleaning cylinder. The upper end of the folding rubber sleeve is fixedly connected to a support plate, and the folding rubber sleeve penetrates through the support plate. A guide rod is fixedly connected to the lower surface of the support plate, and the guide rod penetrates through the horizontal plate. A second spring is fixedly connected between the support plate and the horizontal plate. A ventilation pipe is connected to the horizontal plate, and the lower end of the ventilation pipe communicates with the dryer.

[0009] As a preferred embodiment of the present invention, a motor is fixedly connected to one side of the housing, the main shaft of the motor penetrates through the housing, and a cam is fixedly connected to the main shaft of the motor. The cam contacts the lower surface of the sliding block.

[0010] As a preferred embodiment of the present invention, a vertical plate is fixedly connected to the lower surface of the horizontal plate, and a support plate is fixedly connected to the lower surface of the vertical plate. A rotating shaft is rotatably connected to the support plate, the rotating shaft penetrates through the support plate, and a support rod is fixedly connected to the lower end of the rotating shaft. A vertical rod is fixedly connected to the lower surface of the support plate, and a cross rod is fixedly connected to the lower end of the vertical rod. An elastic folding water-absorbing cloth is connected between the support rod and the horizontal plate.

[0011] As a preferred embodiment of the present invention, a rotating column is rotatably connected to the support plate, the rotating column penetrates through the support plate, and a circular through groove is provided on the rotating column. A round rod is fixedly connected to the lower end of the guide rod, and the round rod is located in the circular through groove. A spiral groove is provided on the outer circle of the round rod, and a ball is rotatably connected to the side wall of the circular through groove. The ball is located in the spiral groove. A first gear is fixedly connected to the outer circle of the rotating column, and a second gear is fixedly connected to the outer circle of the rotating shaft. The first gear meshes with the second gear.

[0012] Compared with the prior art, the present invention provides an auxiliary positioning structure based on a multi-laser SLM printer, which has the following beneficial effects:

[0013] 1. For the auxiliary positioning structure based on the multi-laser SLM printer, by setting the dust removal device, the electric push rod pushes the dust removal device to extend out of the housing and reach below the laser lens. Then, the sliding block is pushed upward to make the dust removal device approach the laser lens upward, so as to perform dust removal on the laser lens, avoiding the influence of dust on the laser lens on the laser landing point, resulting in laser printing starting point positioning errors and affecting the workpiece forming. Through the dust removal device, it is beneficial to improve the cleanliness of the laser lens, increase the penetration of the laser lens, and make the laser landing point more accurate;

[0014] 2. The auxiliary positioning structure based on a multi-laser SLM printer, by setting a folding rubber sleeve, the motor drives the cam to rotate, pushing the sliding block upward. The first spring contracts and stores energy, causing the folding rubber sleeve and the support plate to stick upward to the side of the laser lens. Continuing to push the sliding block upward, under the action of the second spring, while the folding rubber sleeve contracts, it closely adheres to the periphery of the laser lens. The liquid level in the cleaning cylinder is at the middle position of the folding rubber sleeve to avoid excessive liquid, which may cause the liquid to splash out during movement, resulting in the metal powder in the lower powder cylinder getting wet. When the folding rubber sleeve contracts, the liquid level of the cleaning liquid gradually rises until the cleaning liquid wraps the laser lens. The folding rubber sleeve closely adhering to the periphery of the laser lens can prevent the cleaning liquid from overflowing;

[0015] 3. The auxiliary positioning structure based on a multi-laser SLM printer, by setting an ultrasonic generating device. When the ultrasonic generating device is turned on, it cleans the laser lens by oscillating the cleaning liquid, washing away the smoke particles on the surface, improving the light transmittance of the laser lens, enhancing the cleaning effect on the laser lens, and avoiding the residue of smoke particles or stains. After cleaning, the first spring resets and pushes the sliding block downward to reset. The folding rubber sleeve moves downward away from the periphery of the laser lens, and the folding rubber sleeve resumes its height, and the liquid level moves away from the laser lens. When the folding rubber sleeve moves downward away, the dryer blows hot air to the laser lens through the ventilation pipe to dry the laser lens, avoiding the remaining water droplets, which may cause laser refraction and inaccurate laser spot positioning;

[0016] 4. The auxiliary positioning structure based on a multi-laser SLM printer, by setting a water-absorbing cloth. While the folding rubber sleeve contracts, it closely adheres to the periphery of the laser lens. At this time, the distance between the support plate and the cross plate becomes smaller. The guide rod pushes the round rod downward. When the round rod moves downward, the ball rolls along the spiral groove, forcing the rotating column to rotate. Through the first gear driving the second gear to rotate, the rotating shaft rotates, driving the support rod to rotate, and unfolding the water-absorbing cloth into a circle to catch the cleaning liquid that drops due to the oscillation of the ultrasonic generating device, further preventing it from falling on the metal powder and thus affecting the printing of the printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the device;

[0018] Figure 2 is a sectional structural schematic diagram inside the housing;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the dust removal device;

[0020] Figure 4 is a sectional structural schematic diagram of the dust removal device;

[0021] Figure 5 is a schematic diagram of the usage state of the dust removal device.

[0022] In the figure: 1. Support frame; 11. Printer body; 12. Laser lens; 13. Vertical plate; 14. Housing; 2. Slide block; 21. Electric push rod; 22. First spring; 3. Dust removal device; 31. Horizontal plate; 32. Cleaning cylinder; 33. Ultrasonic generating device; 34. Folding rubber sleeve; 35. Support plate; 36. Guide rod; 37. Second spring; 38. Ventilation pipe; 4. Motor; 41. Cam; 5. Vertical plate; 51. Support plate; 52. Rotating shaft; 53. Support rod; 54. Vertical rod; 55. Cross bar; 56. Absorbent cloth; 6. Rotating column; 61. Round rod; 62. Spiral groove; 63. Ball; 64. First gear; 65. Second gear. Specific implementation mode

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-5 , in this implementation plan:

[0025] An auxiliary positioning structure based on a multi-laser SLM printer, including a support frame 1. A powder cylinder is provided on the upper surface of the support frame 1. The printer body 11 is fixed on one side of the powder cylinder on the upper surface of the support frame 1. A laser lens 12 is provided on the lower surface of the printer body 11. The vertical plate 13 is fixedly connected to the upper surface of the support frame 1. A square through groove is provided on the vertical plate 13. The side wall of the square through groove is fixedly connected to the housing 14. A dust removal device 3 is provided in the housing 14. The dust removal device 3 is used to clean the laser lens 12. A chute is provided on one side of the housing 14. The chute penetrates through the housing 14. A slide block 2 is slidably connected in the chute. One side of the slide block 2 is fixedly connected to the electric push rod 21. The telescopic rod of the electric push rod 21 penetrates through the slide block 2. A first spring 22 is fixedly connected between the slide block 2 and the chute. The dust removal device 3 is located on one side of the telescopic rod of the electric push rod 21.

[0026] When the printer is printing, it performs laser printing according to the sliced pictures. During printing, smoke particles are generated. These smoke particles will rise and stick to the upper laser lens 12. Then, when the sliced pictures are replaced and powder is spread, the electric push rod 21 pushes the dust removal device 3 out of the housing 14 and reaches below the laser lens 12. Then, it pushes the sliding block 2 upward, making the dust removal device 3 move upward close to the laser lens 12 to perform dust removal on the laser lens 12, avoiding the dust on the laser lens 12 affecting the laser landing point, resulting in a positioning error in the starting point of laser printing and affecting the workpiece forming. Through the dust removal device, it is beneficial to improve the cleanliness of the laser lens 12, increase the penetration of the laser lens 12, and make the laser landing point more accurate.

[0027] The dust removal device 3 includes a cross plate 31. The cross plate 31 is fixedly connected to the telescopic rod of the electric push rod 21. A circular through groove is fixedly connected to the upper part of the cross plate 31. The inner wall of the circular through groove is fixedly connected to a cleaning cylinder 32. An ultrasonic generating device 33 is arranged on the lower surface of the cleaning cylinder 32. A folding rubber sleeve 34 is fixedly connected to the upper end of the cleaning cylinder 32. The upper end of the folding rubber sleeve 34 is fixedly connected to a support plate 35. The folding rubber sleeve 34 penetrates through the support plate 35. A guide rod 36 is fixedly connected to the lower surface of the support plate 35. The guide rod 36 penetrates through the cross plate 31. A second spring 37 is fixedly connected between the support plate 35 and the cross plate 31. A ventilation pipe 38 is connected to the cross plate 31. The lower end of the ventilation pipe 38 is communicated with a dryer. A motor 4 is fixedly connected to one side of the housing 14. The main shaft of the motor 4 penetrates through the housing 14. The main shaft of the motor 4 is fixedly connected to a cam 41. The cam 41 contacts the lower surface of the sliding block 2.

[0028] After the electric push rod 21 pushes the dust removal device 3 to reach below the laser lens 12, the motor 4 drives the cam 41 to rotate, pushing the sliding block 2 upward. The first spring 22 contracts and stores energy, making the folding rubber sleeve 34 and the support plate 35 stick to the side of the laser lens 12 upward. Continuing to push the sliding block 2 upward, under the action of the second spring 37, while the folding rubber sleeve 34 contracts, it closely adheres to the periphery of the laser lens 12. The liquid level in the cleaning cylinder 32 is at the middle position of the folding rubber sleeve 34 to avoid excessive liquid, resulting in liquid splashing during movement and making the metal powder in the lower powder cylinder wet. The contraction of the folding rubber sleeve 34 will cause the liquid level of the cleaning liquid to gradually rise until the cleaning liquid wraps the laser lens 12. The folding rubber sleeve 34 closely adhering to the periphery of the laser lens 12 can prevent the cleaning liquid from overflowing. At this time, the ultrasonic generating device 33 is turned on, and the laser lens 12 is cleaned by oscillating the cleaning liquid, washing away the smoke particles on the surface, improving the light transmittance of the laser lens 12, enhancing the cleaning effect on the laser lens 12, and avoiding the residue of smoke particles or stains;

[0029] After cleaning, the first spring 22 resets and pushes the sliding block 2 downward to reset. The folding rubber sleeve 34 moves downward away from the periphery of the laser lens 12, and the folding rubber sleeve 34 resumes its height. The liquid level moves away from the laser lens 12. When the folding rubber sleeve 34 moves downward and away, the dryer blows hot air to the laser lens 12 through the ventilation pipe 38 to air-dry the laser lens 12, avoiding residual water droplets that may cause laser refraction and inaccurate laser spot positioning.

[0030] The lower surface of the horizontal plate 31 is fixedly connected to the vertical plate 5. The lower surface of the vertical plate 5 is fixedly connected to the support plate 51. A rotating shaft 52 is rotatably connected to the support plate 51. The rotating shaft 52 penetrates the support plate 51. The lower end of the rotating shaft 52 is fixedly connected to the support rod 53. The lower surface of the support plate 51 is fixedly connected to the vertical rod 54. The lower end of the vertical rod 54 is fixedly connected to the horizontal rod 55. An elastic folding water-absorbing cloth 56 is connected between the support rod 53 and the horizontal plate 31. A rotating column 6 is rotatably connected to the support plate 51. The rotating column 6 penetrates the support plate 51. A circular through groove is provided on the rotating column 6. The lower end of the guide rod 36 is fixedly connected to the round rod 61. The round rod 61 is located in the circular through groove. A spiral groove 62 is provided on the outer circle of the round rod 61. The side wall of the circular through groove is rotatably connected to the ball 63. The ball 63 is located in the spiral groove 62. The outer circle of the rotating column 6 is fixedly connected to the first gear 64. The outer circle of the rotating shaft 52 is fixedly connected to the second gear 65. The first gear 64 meshes with the second gear 65.

[0031] When the motor 4 drives the cam 41 to rotate, the sliding block 2 is pushed upward, and the first spring 22 contracts and stores energy. While the folding rubber sleeve 34 contracts, it closely adheres to the periphery of the laser lens 12. At this time, the distance between the support plate 35 and the horizontal plate 31 becomes smaller. The guide rod 36 pushes the round rod 61 downward. When the round rod 61 moves downward, the ball 63 rolls along the spiral groove 62, forcing the rotating column 6 to rotate. The rotating column 6 drives the second gear 65 to rotate through the first gear 64, causing the rotating shaft 52 to rotate and driving the support rod 53 to rotate, unfolding the water-absorbing cloth 56 into a circle to catch the cleaning liquid that drops due to the oscillation of the ultrasonic generating device 33, further preventing it from falling on the metal powder and thus affecting the printing of the printer.

[0032] Working principle and usage process of the present invention: After the electric push rod 21 pushes the dust removal device 3 to the lower part of the laser lens 12, the motor 4 drives the cam 41 to rotate, pushing the sliding block 2 upward. The first spring 22 contracts and stores energy. The distance between the support plate 35 and the cross plate 31 becomes smaller. The folding rubber sleeve 34 and the support plate 35 are pressed against the side of the laser lens 12 upward. Continuing to push the sliding block 2 upward, under the action of the second spring 37, while the folding rubber sleeve 34 contracts, it closely adheres to the periphery of the laser lens 12. The cleaning liquid wraps the laser lens 12. At the same time, since the distance between the support plate 35 and the cross plate 31 becomes smaller, the guide rod 36 pushes the round rod 61 downward. When the round rod 61 moves downward, the ball 63 rolls along the spiral groove 62, forcing the rotating column 6 to rotate, driving the second gear 65 to rotate through the first gear 64, making the rotating shaft 52 rotate, driving the support rod 53 to rotate, and unfolding the water-absorbing cloth 56 into a circle. After that, the ultrasonic generating device 33 is turned on, and the laser lens 12 is cleaned by oscillating the cleaning liquid.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An auxiliary positioning structure based on a multi-laser SLM printer, characterized in that: It includes a support frame (1). A powder cylinder is provided on the upper surface of the support frame (1). A printer body (11) is fixed on the upper surface of the support frame (1) on one side of the powder cylinder. A laser lens (12) is provided on the lower surface of the printer body (11). A vertical plate (13) is fixedly connected to the upper surface of the support frame (1). A square through groove is provided on the vertical plate (13). The side wall of the square through groove is fixedly connected to a housing (14). A dust removal device (3) is provided in the housing (14), and the dust removal device (3) is used to clean the laser lens (12). A chute is provided on one side of the housing (14). The chute penetrates through the housing (14). A sliding block (2) is slidably connected in the chute. One side of the sliding block (2) is fixedly connected to an electric push rod (21). The telescopic rod of the electric push rod (21) penetrates through the sliding block (2). A first spring (22) is fixedly connected between the sliding block (2) and the chute. The dust removal device (3) is located on one side of the telescopic rod of the electric push rod (21). The dust removal device (3) includes a cross plate (31). The cross plate (31) is fixedly connected to the telescopic rod of the electric push rod (21). A circular through groove is fixedly connected to the upper surface of the cross plate (31). The inner wall of the circular through groove is fixedly connected to a cleaning cylinder (32). An ultrasonic generating device (33) is provided on the lower surface of the cleaning cylinder (32). A folding rubber sleeve (34) is fixedly connected to the upper end of the cleaning cylinder (32). The upper end of the folding rubber sleeve (34) is fixedly connected to a support plate (35). The folding rubber sleeve (34) penetrates through the support plate (35). A guide rod (36) is fixedly connected to the lower surface of the support plate (35). The guide rod (36) penetrates through the cross plate (31). A vertical plate (5) is fixedly connected to the lower surface of the cross plate (31). A support plate (51) is fixedly connected to the lower surface of the vertical plate (5). A rotating shaft (52) is rotatably connected to the support plate (51). The rotating shaft (52) penetrates through the support plate (51). A support rod (53) is fixedly connected to the lower end of the rotating shaft (52). A vertical rod (54) is fixedly connected to the lower surface of the support plate (51). A cross rod (55) is fixedly connected to the lower end of the vertical rod (54). An elastic folding water-absorbing cloth (56) is connected between the support rod (53) and the cross plate (31).

2. The auxiliary positioning structure based on a multi-laser SLM printer according to claim 1, wherein: A second spring (37) is fixedly connected between the support plate (35) and the cross plate (31). A ventilation pipe (38) is connected to the cross plate (31). The lower end of the ventilation pipe (38) is communicated with a dryer.

3. The auxiliary positioning structure based on a multi-laser SLM printer according to claim 1, wherein: A motor (4) is fixedly connected to one side of the housing (14). The main shaft of the motor (4) penetrates through the housing (14). The main shaft of the motor (4) is fixedly connected to a cam (41). The cam (41) contacts the lower surface of the sliding block (2).

4. An auxiliary positioning structure based on a multi-laser SLM printer according to claim 1, characterized in that: A rotating column (6) is rotatably connected to the support plate (51). The rotating column (6) penetrates through the support plate (51). A circular through groove is provided on the rotating column (6). The lower end of the guide rod (36) is fixedly connected to a round rod (61). The round rod (61) is located in the circular through groove. A spiral groove (62) is provided on the outer circle of the round rod (61). A ball (63) is rotatably connected to the side wall of the circular through groove. The ball (63) is located in the spiral groove (62). A first gear (64) is fixedly connected to the outer circle of the rotating column (6). A second gear (65) is fixedly connected to the outer circle of the rotating shaft (52). The first gear (64) is engaged with the second gear (65).

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