Device for assisting multi-laser overlap verification and additive manufacturing equipment
By designing an auxiliary multi-laser overlap verification device, using the combination of support plates and image aluminum plates, combined with water-cooled runners, the problem of low efficiency in calibration and overlap verification of additive manufacturing equipment is solved, and fast and efficient overlap verification is achieved. Improves the working efficiency of the equipment.
Patent Information
- Application Number
- CN202323281274.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-04
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-04
AI Technical Summary
During the calibration and overlap verification process, existing additive manufacturing equipment needs to wait for the equipment temperature to decrease, and tedious preparation work is required, resulting in low equipment investment efficiency and difficult to meet the needs of continuous production.
A device for assisting multi-laser overlap verification is designed, including a support plate and an image aluminum plate. Positioning holes are provided on the support plate for installing an image aluminum plate. The upper surface of the image aluminum plate must be flush with the powder plane, and the support plate is provided in the Water-cooled runners reduce the temperature impact, eliminating waiting for temperature drop and cumbersome operations.
It improves the working efficiency of additive manufacturing equipment, reduces labor working time and cost, and can quickly conduct overlap verification, avoiding the stability of the equipment due to temperature changes.
Smart Images
Figure CN222246128U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of three-dimensional object manufacturing, in particular to a device for assisting multi-laser overlap verification and additive manufacturing equipment. Background Art
[0002] Additive Manufacturing (AM) is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Since it is not limited by the complexity of the part shape and does not require any tooling, it has a very wide range of applications. As one of the additive manufacturing technologies, selective laser sintering technology has also developed very rapidly in recent years. Its main process is: the powder feeding device delivers a certain amount of powder to the workbench, the powder spreading roller spreads a layer of powder material on the upper surface of the formed part of the mechanism, the heating device heats the powder to the set temperature, and the galvanometer system controls the laser to scan the solid part powder layer according to the cross-sectional profile of the layer, so that the powder melts and bonds with the formed part below; when a layer of cross section is sintered, the workbench drops a layer of thickness, and the powder spreading roller spreads a layer of uniform and dense powder on it, and scans and sinters a new layer of cross section, and after several layers of scanning and superposition, the entire part manufacturing is completed.
[0003] In the above-mentioned additive manufacturing technology, the stability and calibration consistency of multi-galvanometer equipment are particularly important. The position deviation of a single galvanometer often leads to the scrapping of the entire printed part. Therefore, before the production work starts, it is necessary to check the status of each galvanometer of the equipment and the multi-laser overlap. The calibration device of the prior art not only needs to wait for the temperature in the cavity of the equipment to drop to a suitable temperature before it can be carried out, but also needs to do a lot of preparation work before calibration, such as removing the scraper, cleaning the cavity powder, installing the leveling tooling, substrate leveling, etc. However, for the additive manufacturing equipment with continuous production, the time for printing parts to be put on and off the machine is short, the powder material will be retained in the equipment, and the temperature of the equipment cavity is in the process of gradually decreasing. Limited production downtime, uncleaned cylinder, and changing cavity ambient temperature make it difficult for the calibration device of the prior art to quickly put into overlap verification work, that is, it is difficult to meet production needs in terms of efficiency. Utility Model Content
[0004] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides a device for assisting multi-laser overlap verification and an additive manufacturing device. The device for assisting multi-laser overlap verification has a simple structure and saves a lot of preparation work before use and the time of waiting for the temperature to drop, thereby improving the working efficiency of the additive manufacturing equipment.
[0005] To achieve the above-mentioned purpose, the utility model provides a device for assisting multi-laser overlap verification, comprising a support plate and a plurality of image aluminum plates, wherein a plurality of positioning holes are provided on the upper portion of the support plate, each positioning hole is used to install one of the image aluminum plates, and when all the image aluminum plates are in a working state, the upper surface of the image aluminum plate is flush with the powder plane of the working area in the additive manufacturing equipment; a water-cooling flow channel is provided inside the support plate, and a sinking platform is provided at the bottom of the support plate, so that the device for assisting multi-laser overlap verification can be embedded in the forming cylinder of the additive manufacturing equipment.
[0006] As a further preferred embodiment of the present invention, the inner wall of the positioning hole is an inclined surface, so that the cross-sectional area of the positioning hole gradually increases from bottom to top.
[0007] As a further preferred embodiment of the present invention, the angle between the inclined surface and the vertical surface of the positioning hole is greater than 30 degrees and less than 90 degrees.
[0008] As a further preferred embodiment of the present invention, the top surface of the positioning hole is higher than the top surface of the image aluminum plate.
[0009] As a further preferred solution of the utility model, a hollow structure is provided on the upper portion of the support plate.
[0010] As a further preferred solution of the present invention, the support plate is made of aluminum alloy.
[0011] As a further preferred embodiment of the present invention, a water inlet and a water outlet are respectively provided on both sides of the support plate, so that cooling water enters the water cooling channel through the water inlet for heat exchange, and the water after heat exchange flows out through the water outlet.
[0012] As a further preferred embodiment of the present invention, when the number of lasers is two, the number of the positioning holes is three, one is arranged at the center of the support plate, and the other two are symmetrically arranged on both sides of the center, and the three positioning holes are located on the same straight line.
[0013] As a further preferred embodiment of the present invention, when the number of lasers is four, the number of positioning holes is five, one is arranged at the center of the support plate, and the other four are symmetrically arranged around the center, and the five positioning holes are located on two straight lines in the shape of a cross.
[0014] The utility model also provides an additive preparation device, including the device for assisting multi-laser overlap verification as described in any of the above items. When multi-laser overlap verification is required, the molding platform of the molding cylinder is controlled to move downward, and the two sides of the support plate of the device for assisting multi-laser overlap verification are placed on the two side walls of the molding cylinder for multi-laser overlap verification.
[0015] The device and additive manufacturing equipment for assisting multi-laser overlap verification of the utility model can achieve the following beneficial technical effects by adopting the above technical solution:
[0016] 1. The utility model only needs to ensure that the upper surface of the image aluminum plate is flush with the powder plane in the working area of the additive manufacturing equipment, so it can save the debugging personnel from many tedious operations in the overlap verification process, such as removing the scraper, cleaning the cavity powder, installing the substrate leveling tooling, etc. The debugging personnel only need to simply clean the contact surface of the device and the equipment to carry out the overlap verification work, which not only saves a lot of manpower work before the overlap verification work, saves costs, but also saves manpower working time;
[0017] 2. Since the overlap verification operation needs to be carried out after the equipment is in a stable state, and the additive manufacturing equipment normally needs to wait for a day after the last high-temperature production, before the cavity structure temperature can drop to a stable state. The utility model can set a water-cooling flow channel to make the device unaffected by the temperature change of the equipment cavity, saving the time of waiting for the cavity structure temperature to stabilize, that is, improving the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic structural diagram of an embodiment of the device for assisting multi-laser overlap verification provided by the utility model;
[0019] Figure 2 for Figure 1 A top view of
[0020] Figure 3 for Figure 1 A cross-sectional view showing the internal water cooling channels;
[0021] Figure 4 for Figure 1 A front view showing the bottom sinking platform;
[0022] Figure 5 for Figure 1 Left view of
[0023] Figure 6 It is a structural schematic diagram of the image aluminum plate in the utility model.
[0024] Markings in the accompanying drawings:
[0025] 1. Positioning hole, 2. Image aluminum plate, 3. Water inlet, 4. Water outlet, 5. Sinking platform, 6. Support plate, 7. Water cooling channel. DETAILED DESCRIPTION
[0026] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0028] like Figures 1 to 6 As shown, the device for assisting multi-laser overlap verification includes a support plate 6 and a plurality of image aluminum plates 2. The upper portion of the support plate 6 is provided with a plurality of positioning holes 1, each positioning hole 1 is used to install one of the image aluminum plates 2, and when all the image aluminum plates 2 are in working state, the upper surface of the image aluminum plate 2 is flush with the powder plane of the working area in the additive manufacturing equipment; the interior of the support plate 6 is provided with a water-cooling flow channel 7, and the bottom of the support plate 6 has a sinking platform 5, so that the device for assisting multi-laser overlap verification can be embedded in the forming cylinder of the additive manufacturing equipment. Specifically, the aperture size of the positioning hole 1 needs to be determined according to the size of the image aluminum plate 2, that is, the positioning hole 1 and the image aluminum plate 2 are matched. The size of the sinking platform 5 is matched with the size of the forming cylinder of the equipment, so that the sinking platform 5 is just embedded in the cylinder body of the forming cylinder. Refer to Figure 6 The image aluminum plate 2 is a circular aluminum plate, and its surface is blackened, and is used to receive laser scanning of the laser and galvanometer system and form an overlap verification pattern. Preferably, the diameter of the circular aluminum plate is 60 mm and the thickness is 1.5 mm.
[0029] Preferably, the inner wall of the positioning hole 1 is an inclined surface, so that the cross-sectional area of the positioning hole 1 gradually increases from bottom to top, which can ensure that the laser beam is not blocked from reaching the surface of the image aluminum plate 2, further improving the laser receiving rate of the image aluminum plate 2. Further preferably, the angle between the inclined surface of the positioning hole 1 and the vertical surface is greater than 30 degrees and less than 90 degrees.
[0030] In order to more conveniently adjust the position of the image aluminum plate 2 , preferably, the top surface of the positioning hole 1 is higher than the top surface of the image aluminum plate 2 .
[0031] Preferably, in order to reduce the weight of the support plate 6, a hollow structure is provided on the upper portion of the support plate 6; and the support plate 6 is made of aluminum alloy. Figure 1As shown, four through holes are opened around the support plate 6. Of course, in a specific implementation, the hollow structure of the support plate 6 can also be in other shapes, which are not listed here one by one.
[0032] Further reading Figure 3 In order to reduce the working chamber temperature of the additive manufacturing equipment to avoid affecting the overlap verification accuracy of the device for assisting multi-laser overlap verification of the present application, a water inlet 3 and a water outlet 4 are respectively provided on both sides of the support plate 6, so that cooling water enters the water cooling channel 7 through the water inlet 3 for heat exchange, and the water after heat exchange flows out through the water outlet 4. Specifically, the water inlet 3 is externally connected to a water cooling device, which is used to provide cooling water.
[0033] It should be noted here that the device for assisting multi-laser overlap verification of the utility model can be applied to overlap verification of multiple lasers. Of course, as the number of lasers increases, the number of the positioning holes 1 and the image aluminum plates 2 also needs to be increased accordingly.
[0034] Specifically, when the number of lasers is two, the number of the positioning holes 1 is three, one is arranged at the center of the support plate 6, and the other two are symmetrically arranged on both sides of the center, and the three positioning holes 1 are located on the same straight line.
[0035] When the number of lasers is four, the number of the positioning holes 1 is five, one is set at the center of the support plate 6, and the other four are symmetrically set around the center, and the five positioning holes 1 are located on two straight lines in the shape of a cross, see Figure 1-Figure 5 .
[0036] When the number of lasers is six, the number of the positioning holes 1 is nine, one is arranged at the center of the support plate 6, and the other eight are symmetrically arranged around the center, and the eight positioning holes 1 are located on two straight lines in the shape of a cross.
[0037] When the number of lasers is larger, such as eight or ten, the number of the positioning holes 1 increases accordingly, which will not be elaborated in detail here.
[0038] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the technical solution of the present invention is described in detail below by taking the number of lasers as four as an example.
[0039] For an additive manufacturing device with four lasers whose galvanometers are arranged in a zigzag pattern, the working process of the device for assisting multi-laser overlap verification in this embodiment is as follows:
[0040] 1. Before implementing the overlap verification, the water inlet end 3 is connected to the water cooling device in advance so that the water cooling channel 7 is connected to the water cooling device. This operation can be performed outside the additive manufacturing equipment that needs overlap verification, which does not affect the production efficiency of the equipment.
[0041] 2. After the printed parts of the additive manufacturing equipment that need to be overlapped and verified are printed, clean the powder around the forming cylinder of the large plate of the equipment after the machine is removed, that is, clean the contact surface between the large plate of the equipment and the device for assisting multi-laser overlap verification in this embodiment.
[0042] 3. The device for assisting multi-laser overlap verification of this embodiment is placed on the two side walls of the forming cylinder of the equipment, so that the sinking platform 5 is embedded in the forming cylinder to complete the positioning of the device, and the device maintains a water-cooling connection.
[0043] 4. Place five image aluminum plates 2 into the five positioning holes 1 accordingly, and scan the four-laser overlap verification pattern. The five image aluminum plates correspond to the five points of the four-laser overlap area.
[0044] 5. Take out the device for assisting multi-laser overlap verification and the image aluminum plate 2 of this embodiment, and use an electron microscope to record and measure the overlap pattern misalignment of the image aluminum plate 2, so as to determine whether the overlap state of the multi-laser meets the production requirements.
[0045] It should be noted here that the core of the protection of this application is a device for assisting multi-laser overlap verification, and the specific overlap verification principle belongs to the existing technology in this field. Therefore, this application does not elaborate on the principle of overlap verification.
[0046] The present embodiment is used to verify the overlap of four laser devices, eliminating the tedious operations of removing the scraper, cleaning the cavity powder, installing the leveling tooling, and other operations in the original method. There is no need to wait for the equipment to cool down and stabilize, thus greatly improving the work efficiency of the equipment overlap verification.
[0047] The utility model also provides an additive preparation device, including the device for assisting multi-laser overlap verification described in any of the above embodiments. When multi-laser overlap verification is required, the molding platform of the molding cylinder is controlled to move downward, and the support plate 6 of the device for assisting multi-laser overlap verification is placed on both side walls of the molding cylinder for multi-laser overlap verification.
[0048] It should be noted that the above-mentioned molding platform is a platform for carrying printing tasks (the platform is a working area), which is driven by the driving mechanism to move up and down in the cylinder walls on both sides of the molding cylinder to achieve layer-by-layer sintering molding of the product. When the product printing requires a substrate, the molding platform includes the substrate.
[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0050] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A device for assisting multi-laser lap verification, characterized in that: It comprises a support plate and a plurality of image aluminum plates, wherein the upper part of the support plate is provided with a plurality of positioning holes, each positioning hole is used to install one of the image aluminum plates, and when all the image aluminum plates are in working state, the upper surface of the image aluminum plate is flush with the powder plane of the working area in the additive manufacturing equipment; the interior of the support plate is provided with a water cooling channel, and the bottom of the support plate has a sinking platform so that the device for assisting multi-laser overlap verification can be embedded in the forming cylinder of the additive manufacturing equipment.
2. The device for assisting multi-laser overlap verification according to claim 1, characterized in that: The inner wall of the positioning hole is an inclined surface, so that the cross-sectional area of the positioning hole gradually increases from bottom to top.
3. The device for assisting multi-laser overlap verification according to claim 1, characterized in that: The included angle between the inclined surface and the vertical surface of the positioning hole is greater than 30 degrees and less than 90 degrees.
4. The device for assisting multi-laser overlap verification according to claim 1, characterized in that: The top surface of the positioning hole is higher than the top surface of the image aluminum plate.
5. The device for assisting multi-laser overlap verification according to claim 1, characterized in that: A hollow structure is provided on the upper portion of the support plate.
6. The device for assisting multi-laser overlap verification according to claim 1, characterized in that: The support plate is made of aluminum alloy.
7. The device for assisting multi-laser overlap verification according to claim 1, characterized in that: A water inlet and a water outlet are respectively provided on both sides of the support plate, so that cooling water enters the water cooling channel through the water inlet to perform heat exchange, and the water after heat exchange flows out through the water outlet.
8. The device for assisting multi-laser overlap verification according to any one of claims 1 to 7, characterized in that: When the number of lasers is two, the number of the positioning holes is three, one is arranged at the center of the support plate, and the other two are symmetrically arranged on both sides of the center, and the three positioning holes are located on the same straight line.
9. The device for assisting multi-laser overlap verification according to any one of claims 1 to 7, characterized in that: When the number of lasers is four, the number of the positioning holes is five, one is arranged at the center of the support plate, and the other four are symmetrically arranged around the center, and the five positioning holes are located on two straight lines in the shape of a cross.
10. An additive manufacturing device, characterized in that: The device for assisting multi-laser overlap verification comprises the device described in any one of claims 1 to 9. When multi-laser overlap verification is required, the molding platform of the molding cylinder is controlled to move downward, and the supporting plates of the device for assisting multi-laser overlap verification are placed on both side walls of the molding cylinder for performing overlap verification on the multiple lasers.