Shooting device with adjustable lens angle for additive manufacturing

Abstract

The utility model belongs to the technical field of optical imaging, and relates to a shooting device with an adjustable lens angle for additive manufacturing, which comprises a camera main body, an industrial lens and a vertical adjusting assembly, the camera main body is movably connected with the industrial lens through the vertical adjusting assembly, so that the industrial lens moves in the vertical direction; according to the utility model, the camera main body is movably connected with the industrial lens through the vertical adjusting assembly, so that the industrial lens can move in the vertical direction, and an operator can conveniently adjust the angle of the industrial lens based on the Gremer's law; the extension lines of the printing bed, the lens plane and the plane where the photosensitive element of the camera body is located intersect on the same straight line, thereby reducing the distortion of the image output by the camera body, reducing the partial defocus phenomenon in the view range, and ensuring that the camera body outputs a clear image.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging technology, specifically to an additive manufacturing lens angle adjustable shooting device. Background Technology

[0002] In the current field of additive manufacturing technology, especially in laser selective melting (LSM) part forming processes, precise monitoring and real-time control of the powder bed status are core elements for ensuring print quality. To achieve this goal, integrating a camera body to monitor the powder bed status and dynamically adjusting printing parameters based on the monitoring results, thus constructing a closed-loop control system for laser additive manufacturing, is particularly important.

[0003] The structure of the camera body has been studied to some extent in the prior art. See the patent document with application number 202220042277.0, which discloses a camera body including: a camera module including a bracket, a motherboard fixed to the back side of the bracket, and at least one camera fixed to the bracket and located between the motherboard and the bracket, wherein the bracket has a camera mounting hole for each camera; and a mounting member fixed to the camera module for assembling the camera module to the mounting carrier.

[0004] Therefore, it can be seen that when the camera body is in use, the optical axis of the camera lens remains perpendicular to the observation surface and the camera's photosensitive plane, maximizing the clarity and accuracy of the camera's output image, making it easy to directly and accurately capture the detailed state of the powder bed. However, in the actual application scenarios of laser selective melting technology, the installation position of the camera body is often limited because the top space of the printing equipment is often occupied by the laser system, making it difficult to maintain the traditional vertical installation method. This non-vertical installation method with a fixed camera lens angle can easily lead to image distortion in the camera output. At the same time, due to the change in the camera's installation position, the distance between the camera and the printing bed changes accordingly, causing some areas within the field of view to become out of focus, reducing the clarity and accuracy of the camera's output image, making it difficult to accurately monitor the powder bed state, and ultimately affecting the stability of the process closed-loop control. Utility Model Content

[0005] To address the technical problem in the background art where, in practical applications of laser selective melting technology, the camera body is difficult to maintain in a traditional vertical installation manner, and the camera lens angle is fixed, resulting in image distortion and defocusing in some areas of the field of view, making it difficult to accurately monitor the powder bed status, this utility model provides an additive manufacturing lens angle adjustable shooting device.

[0006] This utility model relates to an additive manufacturing lens-angle adjustable imaging device. The camera body and industrial lens are movably connected via a vertical adjustment component, enabling the industrial lens to move vertically. This allows operators to adjust the angle of the industrial lens based on Scheres' law, ensuring that the extension lines of the printing bed, the lens plane, and the plane containing the camera body's photosensitive element intersect on the same straight line. This reduces distortion in the output image of the camera body, minimizes defocusing within the field of view, ensures clear image output from the camera body, improves the quality of monitoring images in laser selective melting technology, and further enables precise monitoring of the powder bed status, thereby improving the stability of the process closed-loop control.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] An additive manufacturing lens-angle adjustable shooting device includes a camera body, an industrial lens, and a vertical adjustment component; the camera body and the industrial lens are movably connected through the vertical adjustment component, allowing the industrial lens to move in a vertical direction.

[0009] In one specific implementation, the vertical adjustment assembly includes a lens slide, a lens mounting bracket, and a fixing component. The lens slide is fixedly connected to the camera body, and a set of through slots are symmetrically arranged on the left and right sides of the lens slide. The through slots are arc-shaped slots extending in the vertical direction. The lens mounting bracket is fixedly connected to the industrial lens, and a set of sliding shafts that cooperate with the through slots are symmetrically arranged on the left and right sides of the lens mounting bracket. One end of the sliding shaft is fixedly connected to the lens mounting bracket, and the other end of the sliding shaft passes through the through slot and is rotatably or slidably connected to the through slot. The fixing component is connected to the lens slide and is used to fix the position of the lens mounting bracket.

[0010] In one specific implementation, the fixing component includes a first fixing screw and a second fixing screw; both the first fixing screw and the second fixing screw pass through the lens slide and are threadedly connected to the lens mounting bracket, and the first fixing screw and the second fixing screw are located at the upper and lower ends of the through groove, respectively.

[0011] In one specific implementation, the first fixing screw is a hand-tightening fixing screw; the second fixing screw is a wrench-tightening fixing screw.

[0012] In one specific implementation, the sliding shaft is provided in multiple sets, and the multiple sets of sliding shafts are distributed along the height direction of the lens slide.

[0013] In one specific implementation scheme, the front end of the lens slide is symmetrically provided with arc surfaces, and the arc projected by the arc surface and the arc projected by the through groove are concentric circles; pointers are symmetrically provided on the lens mounting bracket, and the tips of the pointers are close to the corresponding arc surfaces.

[0014] In one specific implementation, the lens angle adjustment device further includes an angle sensor mounted on the industrial lens.

[0015] In one specific implementation, the lens slide and the lens mounting bracket are connected by a sliding shaft, a rotating shaft, a collar, or a bearing.

[0016] In one specific implementation, the lens angle adjustment device further includes a horizontal adjustment component; the structure of the horizontal adjustment component is the same as that of the vertical adjustment component, and by adjusting the horizontal adjustment component, the industrial lens moves in the horizontal direction.

[0017] In one specific implementation, the powder blocking assembly is connected to the lens slide, and the powder blocking assembly is located in the gap between the lens slide and the camera body and the gap between the lens slide and the industrial lens.

[0018] In summary, this utility model has the following beneficial technical effects:

[0019] 1. This utility model relates to an additive manufacturing lens-angle adjustable shooting device. The camera body and the industrial lens are movably connected through a vertical adjustment component, enabling the industrial lens to move vertically. This allows operators to adjust the angle of the industrial lens based on Scheres' law, ensuring that the extension lines of the printing bed, the lens plane, and the plane containing the camera body's photosensitive element intersect on the same straight line. This reduces distortion in the output image of the camera body, minimizes partial defocusing within the field of view, ensures clear image output by the camera body, improves the monitoring image quality in laser selective melting technology, and further enables precise monitoring of the powder bed status, thereby improving the stability of the process closed-loop control.

[0020] 2. The present invention relates to an additive manufacturing lens angle adjustable shooting device, wherein the lens slide is fixedly connected to the camera body and the lens mounting bracket is fixedly connected to the industrial lens. The industrial lens can be moved in the vertical direction through the cooperation between the through groove on the lens slide and the sliding shaft on the lens mounting bracket, and the position of the adjusted industrial lens is fixed by the fixing component, thereby improving the angle adjustment efficiency of the industrial lens.

[0021] 3. The additive manufacturing lens angle adjustable imaging device of this utility model is equipped with a horizontal adjustment component, which enables the industrial lens to be adjusted in two degrees of freedom, vertical and horizontal. This dual-degree-of-freedom adjustment method further improves the adjustment flexibility and accuracy of the lens, thereby meeting more complex monitoring needs. At the same time, the structure of the horizontal adjustment component is the same as that of the vertical adjustment component, which facilitates standardized production and interchangeability. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of the additive manufacturing lens angle adjustable shooting device of this utility model.

[0023] Figure 2 This is a partial structural schematic diagram of the additive manufacturing lens angle adjustable shooting device of this utility model, intended to illustrate the vertical adjustment component.

[0024] Figure 3 This is a top view of the additive manufacturing lens angle adjustable shooting device of this utility model.

[0025] Figure 4 This is a partial structural schematic diagram of the additive manufacturing lens angle adjustable shooting device of this utility model, intended to illustrate the lens slide.

[0026] Figure 5 This is a partial structural schematic diagram of the additive manufacturing lens angle adjustable shooting device of this utility model, intended to illustrate the lens mounting bracket.

[0027] Figure 6 This is a structural schematic diagram of Embodiment 3 of this utility model.

[0028] Figure 7 This is a structural schematic diagram of Embodiment 4 of this utility model.

[0029] Figure 8 This is a structural schematic diagram of Embodiment 4 of this utility model.

[0030] Explanation of reference numerals in the attached drawings: 1. Camera body; 11. Pointer; 2. Industrial lens; 3. Vertical adjustment assembly; 31. Lens slide; 32. Lens mounting bracket; 33. Through slot; 34. Sliding shaft; 35. First fixing screw; 36. Second fixing screw; 4. Horizontal adjustment assembly; 5. Powder blocking assembly; 6. Scale line. Detailed Implementation

[0031] The technical solution of this utility model will be further explained and described below with reference to the accompanying drawings and embodiments, but this utility model is not limited to the embodiments described below.

[0032] Reference Figure 1In practical applications of laser selective melting technology, the installation position of the camera body 1 is often limited because the top space of the printing equipment is often occupied by the laser system, making it difficult to maintain the traditional vertical installation method. This non-vertical installation method, with the fixed lens angle of the camera, easily leads to distortion of the image output by the camera. At the same time, due to the change in the camera installation position, the distance between the camera and the printing bed changes accordingly, causing some areas within the field of view to become out of focus. This reduces the clarity and accuracy of the image output by the camera, making it difficult to accurately monitor the powder bed status and ultimately affecting the stability of the closed-loop control of the process. This invention aims to provide an adjustable lens angle shooting device for additive manufacturing. The camera body 1 and the industrial lens 2 are movably connected by a vertical adjustment component 3, enabling the industrial lens 2 to move in the vertical direction. This facilitates the operator to adjust the angle of the industrial lens 2 based on Scheres' law, so that the extension lines of the printing bed, the lens plane, and the plane where the photosensitive element of the camera body 1 is located intersect on the same straight line. This reduces the distortion of the image output by the camera body 1, reduces partial defocusing within the field of view, ensures that the camera body 1 outputs a clear image, improves the monitoring image quality in laser selective melting technology, and further accurately monitors the powder bed status, improving the stability of the closed-loop control of the process.

[0033] Example 1:

[0034] Reference Figures 1-5 An additive manufacturing lens-angle adjustable shooting device includes: a camera body 1, an industrial lens 2, and a vertical adjustment assembly 3. The industrial lens 2 is movably connected to the camera body 1 via the vertical adjustment assembly 3, allowing the industrial lens 2 to move vertically. The vertical adjustment assembly 3 includes a lens slide 31, a lens mounting bracket 32, and a fixing component. The lens slide 31 is fixedly connected to the camera body 1. The industrial lens 2 passes through the lens slide 31 and is movably connected to the camera body 1. The industrial lens 2 moves vertically. The lens slide 31 is symmetrically provided with a set of through slots 33 extending vertically. The lens mounting bracket 32 ​​is fixedly connected to the industrial lens 2. The lens mounting bracket 32 ​​is symmetrically provided with a set of sliding shafts 34 that cooperate with the through slots 33. One end of the sliding shaft 34 is fixedly connected to the lens mounting bracket 32, and the other end of the sliding shaft 34 passes through the through slots 33 and is rotatably or slidably connected to the through slots 33. The fixing member is connected to the lens slide 31 to fix the position of the lens mounting bracket 32. The industrial lens 2 can rotate vertically through the cooperation of the through slots 33 and the sliding shafts 34.

[0035] Reference Figure 1 and Figure 2The fixing components include a first fixing screw 35 and a second fixing screw 36. Both the first fixing screw 35 and the second fixing screw 36 pass through the lens slide 31 and are threadedly connected to the lens mounting bracket 32, and the first fixing screw 35 and the second fixing screw 36 are located at the upper and lower ends of the through groove 33, respectively.

[0036] Specifically, the first fixing screw 35 is a hand-tightening fixing screw, which is convenient for operators to operate with one hand and is suitable for frequent adjustment of the angle of the industrial lens 2; the second fixing screw 36 is a wrench-tightening fixing screw, which locks the angle of the industrial lens 2 after the first fixing screw 35 locks it, thereby improving the stability and reliability of the lens angle adjustment device.

[0037] Reference Figure 1 Multiple sets of sliding shafts 34 are provided, and the multiple sets of sliding shafts 34 are distributed along the height direction of the lens slide 31.

[0038] Specifically, the sliding shafts 34 can be configured in two, three, or four groups. By setting an appropriate number of sliding shafts 34, the force is distributed, reducing the wear and deformation of a single sliding shaft 34 and enhancing the stability of the industrial lens 2 in the vertical direction. All such configurations are acceptable. Preferably, the sliding shafts 34 are configured in two groups, with the two groups of sliding shafts 34 evenly distributed along the extension direction of the through groove 33. Setting two groups of sliding shafts 34 improves the stability of the industrial lens 2 during rotation.

[0039] Reference Figure 1 The lens slide 31 and the lens mounting bracket 32 ​​are connected by a sliding shaft 34, a rotating shaft, a collar, or a bearing. Choosing a suitable connection method facilitates flexible movement between the lens slide 31 and the lens mounting bracket 32, ensuring unobstructed vertical movement of the industrial lens 2. Any of these configurations is acceptable. Preferably, the lens slide 31 and the lens mounting bracket 32 ​​are connected by a sliding shaft 34, which facilitates assembly and disassembly.

[0040] Reference Figure 1 The lens slide 31 and the lens mounting bracket 32 ​​are fitted with a small clearance to reduce sliding resistance and improve adjustment accuracy.

[0041] Specifically, the lens slide 31 and lens mounting bracket 32 ​​in this device are both made of aluminum, which helps to reduce the overall weight of the device and improve integration convenience; the sliding shaft 34 is made of a material with high hardness and good strength, such as bearing steel, to improve the structural reliability of the lens angle adjustment device.

[0042] Example 2:

[0043] Reference Figure 1 and Figure 3An additive manufacturing lens angle adjustable shooting device, based on embodiment 1, has an arc surface symmetrically arranged on the front end of the lens slide 31, and the arc of the arc surface projection and the arc of the through groove 33 projection are concentric circles; pointers 11 are symmetrically arranged on the lens mounting bracket 32, and the tip of the pointers 11 is close to the corresponding arc surface.

[0044] Specifically, the pointer 11 on the lens mounting bracket 32 ​​engages with the arc surface at the front end of the lens slide 31, facilitating the recording of the rotation angle of the industrial lens 2. Viewed vertically, the arc projected by the arc surface and the arc projected by the through groove 33 are concentric circles. A scale line 6 is provided on the arc surface, using a relatively flexible or easily bendable ruler as a measurement reference. Based on geometric knowledge: Where: L is the arc length, α is the rotation angle of industrial lens 2, and r is the rotation radius of industrial lens 2. Combining the formula, the rotation angle α of industrial lens 2 can be derived by reading the arc length L; the operator reads the reading of pointer 11 on scale line 6 (i.e., arc length L) and calculates the rotation angle α of industrial lens 2.

[0045] In this embodiment, the rotation angle of the industrial lens 2 is recorded by the pointer 11 integrated on the lens mounting bracket 32 ​​and the arc surface at the front end of the lens slide 31, without the need to reserve additional space for the angle measurement module, thus saving space.

[0046] Example 3:

[0047] Reference Figure 1 and Figure 3 An additive manufacturing lens angle adjustable imaging device, based on Embodiment 1, further includes an angle sensor mounted on an industrial lens 2 for accurately measuring the rotation angle of the industrial lens 2. Specifically, the industrial lens 2 has a cavity reserved for mounting the angle sensor.

[0048] In this embodiment, by setting an angle sensor on the industrial lens 2, the rotation angle of the industrial lens 2 can be accurately recorded, thereby improving the accuracy of lens angle adjustment.

[0049] Example 4:

[0050] Reference Figure 1 and Figure 6 An additive manufacturing lens angle adjustable shooting device, based on embodiment 1, further includes a horizontal adjustment component 4; the structure of the horizontal adjustment component 4 is the same as that of the vertical adjustment component 3, and the industrial lens 2 moves in the horizontal direction through the horizontal adjustment component 4.

[0051] In this embodiment, a horizontal adjustment component 4 is provided, which allows the industrial lens 2 to be adjusted in two degrees of freedom, vertical and horizontal. This dual-degree-of-freedom adjustment method further improves the adjustment flexibility and accuracy of the industrial lens 2, thereby meeting more complex monitoring needs. At the same time, the structure of the horizontal adjustment component 4 is the same as that of the vertical adjustment component 3, which facilitates standardized production and interchangeability.

[0052] Example 5:

[0053] Reference Figure 1 , Figure 7 as well as Figure 8 An additive manufacturing lens angle adjustable shooting device, based on embodiment 1, further includes a powder blocking component 5. The powder blocking component 5 is connected to the lens slide 31, and is located in the gap between the lens slide 31 and the camera body 1, and in the gap between the lens slide 31 and the industrial lens 2.

[0054] In this embodiment, the powder blocking component 5 can be made of flexible materials, such as soft rubber or nylon accordion, to increase the sealing reliability of the powder blocking component 5 and prevent powder from entering the gap between the lens slide 31 and the camera body 1, as well as the gap between the lens slide 31 and the industrial lens 2.

[0055] The working principle of this additive manufacturing lens angle adjustable shooting device is as follows: First, set up the shooting environment of the camera body 1 and fix the position of the camera body 1; the camera body 1 starts to take pictures, and the operator evaluates the picture effect; rotate the industrial lens 2, and the sliding shaft 34 moves along the through groove 33 to realize the angle adjustment of the industrial lens 2; after adjusting to a suitable angle, lock the position of the industrial lens 2, take pictures again, and evaluate the picture effect; repeat this operation until a qualified image is taken, and the angle adjustment of the industrial lens 2 is completed.

[0056] The preferred embodiments of this utility model are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A lens-angle adjustable imaging device for additive manufacturing, characterized in that, include: Camera body (1), industrial lens (2), and vertical adjustment assembly (3); The camera body (1) and the industrial lens (2) are movably connected through the vertical adjustment component (3), so that the industrial lens (2) can move in the vertical direction.

2. The additive manufacturing lens angle adjustable imaging device according to claim 1, characterized in that: The vertical adjustment assembly (3) includes a lens slide (31), a lens mounting bracket (32), and a fixing component; The lens slide (31) is fixedly connected to the camera body (1). The lens slide (31) is provided with a set of through grooves (33) symmetrically on the left and right sides. The through grooves (33) are arc-shaped grooves extending in the vertical direction. The lens mounting bracket (32) is fixedly connected to the industrial lens (2), and a set of sliding shafts (34) that cooperate with the through groove (33) are symmetrically arranged on the lens mounting bracket (32). One end of the sliding shaft (34) is fixedly connected to the lens mounting bracket (32), and the other end of the sliding shaft (34) passes through the through groove (33) and is rotatably or slidably connected to the through groove (33). The fixing component is connected to the lens slide (31) and is used to fix the position of the lens mounting bracket (32).

3. The additive manufacturing lens-angle adjustable imaging device according to claim 2, characterized in that: The fastener includes a first fixing screw (35) and a second fixing screw (36); The first fixing screw (35) and the second fixing screw (36) both pass through the lens slide (31) and are threadedly connected to the lens mounting bracket (32), and the first fixing screw (35) and the second fixing screw (36) are located at the upper and lower ends of the through groove (33), respectively.

4. The additive manufacturing lens angle adjustable imaging device according to claim 3, characterized in that: The first fixing screw (35) is a hand-tightening type fixing screw; The second fixing screw (36) is a wrench-tightening fixing screw.

5. The additive manufacturing lens angle adjustable imaging device according to claim 2, characterized in that: The sliding shaft (34) is provided in multiple sets, and the multiple sets of sliding shafts (34) are distributed along the height direction of the lens slide (31).

6. The additive manufacturing lens angle adjustable imaging device according to claim 2, characterized in that: The front end of the lens slide (31) is symmetrically provided with arc surfaces, and the arc projected by the arc surface and the arc projected by the through groove (33) are concentric circles. The lens mounting bracket (32) is symmetrically provided with pointers (11) on the left and right sides, and the tip of the pointers (11) is close to the corresponding arc surface.

7. The additive manufacturing lens angle adjustable imaging device according to claim 1, characterized in that: The lens angle adjustment device also includes an angle sensor, which is mounted on the industrial lens (2).

8. The additive manufacturing lens angle adjustable imaging device according to claim 2, characterized in that: The lens slide (31) and the lens mounting bracket (32) are connected by a sliding shaft (34), a rotating shaft, a collar, or a bearing.

9. The additive manufacturing lens angle adjustable imaging device according to any one of claims 1 to 8, characterized in that: The lens angle adjustment device also includes a horizontal adjustment component (4); The structure of the horizontal adjustment component (4) is the same as that of the vertical adjustment component (3), and the industrial lens (2) moves horizontally by adjusting the horizontal adjustment component (4).

10. The additive manufacturing lens angle adjustable imaging device according to claim 9, characterized in that: The lens angle adjustment device also includes a powder blocking component (5); The powder blocking component (5) is connected to the lens slide (31), and the powder blocking component (5) is located in the gap between the lens slide (31) and the camera body (1) and the gap between the lens slide (31) and the industrial lens (2).

Images