CN116275112A - Powder spreading quality and scraper abrasion monitoring device and method based on SLM - Google Patents
Powder spreading quality and scraper abrasion monitoring device and method based on SLM Download PDFInfo
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- CN116275112A CN116275112A CN202310384220.8A CN202310384220A CN116275112A CN 116275112 A CN116275112 A CN 116275112A CN 202310384220 A CN202310384220 A CN 202310384220A CN 116275112 A CN116275112 A CN 116275112A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/80—Data acquisition or data processing
- B22F10/85—Data acquisition or data processing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/50—Means for feeding of material, e.g. heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/90—Means for process control, e.g. cameras or sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Automation & Control Theory (AREA)
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Abstract
The invention discloses an auxiliary monitoring device and method for powder paving quality and scraper abrasion based on an SLM (selective laser melting), wherein the auxiliary monitoring device comprises a driving system and an image acquisition system which are arranged above an additive chamber, the image acquisition system is connected with a moving part of the driving system through a steering engine, the image acquisition system shoots towards the bottom surface of the additive chamber, a spraying system and a wiping device are respectively arranged on two sides below the image acquisition system, and an openable window is arranged at the top of the additive chamber; the driving system comprises a horizontal driving mechanism, a vertical driving mechanism, a position sensor and a controller, wherein driving motors of the horizontal driving mechanism and the vertical driving mechanism are connected with the controller; the position sensor is connected with the input end of the controller, so that the problems that the monitoring range is limited, the part monitoring device with poor powder paving quality is far away and can not monitor in time and the current situation that dust and black smoke are easily gathered by the camera lens in the prior art are effectively solved.
Description
Technical Field
The invention belongs to the technical field of online monitoring of metal additive manufacturing, and particularly relates to a monitoring device and method for powder paving quality and scraper abrasion based on an SLM.
Background
The selective laser melting (SLM-Selective Laser Melting) is a widely applied metal additive manufacturing process, and is based on the basic idea of rapid condensation, powder materials are sent to a forming substrate layer by layer, partial melting is realized according to a preset geometric model under the action of laser, rapid solidification is realized under the action of temperature difference, and metal parts with extremely small porosity are formed. The SLM forming breaks through the traditional method that only material reduction forming and equal material forming are performed, an additive manufacturing method is creatively introduced, the forming is rapid, materials are saved, a metallurgical bonding metal entity with the density close to 100% can be obtained, the manufactured part has strong mechanical properties (excellent tensile strength, high forming precision, low surface roughness and the like), and the SLM forming is particularly suitable for products with complex cavity structures and complex shapes which cannot be manufactured by the traditional method. With the continuous development of metal additive manufacturing, people hope to monitor the forming process in real time and observe the appearance and the molten pool condition of the forming process, so that the problem of the printing process is solved in time, and the intelligence and the popularity of the technical method of the additive manufacturing are increased.
The SLM is a repeated process of melting, flowing, solidifying and remelting, before laser working, a powder spreading device flatly pushes metal powder onto a substrate of a forming cylinder, a laser beam melts the powder on the substrate according to slice data of the current layer, the current layer is processed, the powder spreading device continuously spreads the metal powder on the processed current layer, and a uniform and flat powder layer spreading surface is formed. And processing the parts layer by layer until the whole part is manufactured. The whole forming process needs to be carried out for thousands of times of circulating powder laying, and the quality of powder laying is the key of forming reliability and stability. During printing, a non-vertical forming is encountered and the doctor blade will also move the blade in a fixed horizontal direction after each layer of sintering is completed. When the direction of the forming offset of the part is opposite to the moving direction of the doctor blade powder spreading, once the situation that the unstable outermost edge of the part is contacted with the doctor blade occurs, the outer edge of the part is relatively easy to scrape or lift up the upper layer of entity of the part, and the situation is called tilting phenomenon generated by the growth of the opposite doctor blade direction. The warpage cannot be covered by powder carried by the doctor blade when the next layer is paved with powder, and laser can still sweep to the part after the layer is sintered, so that excessive sintering is caused, and partial solid gasification or spheroidization is caused. The tilting and powder spreading device generates scratch and abrades the powder spreading structure, so that the powder spreading quality is affected, the vicious circle is caused, and the processing process is failed.
In addition, the powder spreading device is installed according to manual experience and repeatedly adjusts the forming cylinder by a small distance, spreads powder by moving the scraper, observes the powder spreading condition on the substrate, can observe the metallic luster of the substrate until the thickest place on the substrate, finishes pre-powder spreading, avoids the scratch phenomenon in the moving process of the scraper, and ensures good powder spreading effect. In the forming process, only the quality of powder spreading is observed by human eyes, small defects are difficult to find in time, interference adjustment cannot be performed in time, a machine is damaged due to superposition of time, experimental cost is increased, and powder waste is caused.
The existing industrial camera is fixedly arranged at one position, and monitors the whole powder spreading process and the printing process. However, the camera has the defects of limited observation range, poor pixels and the like, and processing byproducts such as black powder, smoke and the like generated by metal powder under the action of high-energy laser are easy to accumulate at a lens, so that the shooting definition is seriously influenced; moreover, the fixed type camera is mainly fixedly arranged at one place, the position is fixed, the monitoring range is limited, and once the part of the monitoring device with poor powder paving quality is far away, the monitoring device can not monitor in time.
Because the powder layer quality detection result has the defects of great uncertainty, larger information deviation reflected by the powder paving quality and poor controllability, the powder paving quality is effectively and dynamically monitored in real time, high-definition image information is shot, and the problems in the SLM additive manufacturing process are beneficial to tracking and recording.
Aiming at a series of problems existing in the powder paving quality of the SLM powder paving device, the conditions of the related researches and published patent documents are as follows:
patent document CN109570502a discloses a device for detecting powder spreading and part surface quality of SLM equipment, the device comprises a scraper frame with a linear array camera, a scraper structure installed at the bottom of the scraper frame, and an image information control and acquisition system positioned outside a forming chamber, etc., the method is that the linear array camera faces to the bottom of the forming chamber, the scraper scans the view field while spreading powder, and a plurality of data units are acquired, so that high resolution and large format images are obtained, and further detection of powder spreading quality and large format size part surface quality is realized. Although the device and the method disclosed in the patent document CN109570502a solve the problem that the shooting field of view cannot adapt to a large format by adopting a linear array camera, the linear array camera is fixed on the scraper frame, the movement of the camera is limited by the position and the movement of the scraper, accurate judgment of defects and comprehensive detection of powder laying quality are difficult to realize, and the accumulation of powder laying defects in places where the camera cannot scan is easy to cause, so that the problem of overall powder laying influences the forming of parts.
Patent document CN106041076B discloses a monitoring system and a detecting method for uniformity of powder spreading in laser rapid prototyping, the device comprises a laser arranged at the top of a shaping cabin, a high-resolution industrial CCD camera, a lens protecting cover and an LED light supplementing lamp, the method is that the camera acquires image information after powder spreading is completed and transmits the image information to a control system, the control system analyzes and detects the image gray level, if the powder spreading quality is unqualified, the powder spreading device is controlled to spread powder again, and laser sintering shaping is not carried out until the quality is qualified. The device and method disclosed in patent document CN106041076B provide a protective cover for isolating a light filling lamp and a lens to prevent dust during image acquisition of a high resolution industrial CCD camera, so that uniform and smooth detection of powder spreading and outline dimensions of each sintered layer forming part are realized, but the fixed installation of the camera can only detect partial powder spreading condition, more importantly, the unstable movement of the powder spreading device causes shaking of a linear array camera fixed on the device, the obtained image data information has the problems of unilaterality and lower reliability, moreover, the protective cover easily collects dust to cause blurred imaging vision of the camera, and the requirements of real-time detection and improvement of part forming precision are not met.
As known from the above patent documents, no clear and omnibearing detection is reported on a powder spreading layer by a movable camera at present, and the existing protection lens mode of a protection cover and a compensation lamp only detects accurately when processing is started, once dust and black smoke are converged on the protection cover and the compensation lamp, the visibility of the camera is greatly reduced, and the problems of high-precision detection and compensation adjustment of the whole forming process cannot be solved, so that the actual monitoring needs cannot be met.
Disclosure of Invention
Aiming at the defects and the places needing improvement in the prior art, the invention aims to provide a monitoring device and a method based on the powder paving quality and scraper abrasion of an SLM, which effectively solve the problems that the monitoring range is limited, the part monitoring device with poor powder paving quality is far away, so that dust and black smoke cannot be timely monitored, and the camera lens is easy to gather.
In order to achieve the above object, the first technical scheme adopted by the present invention is: the auxiliary monitoring device comprises a driving system and an image acquisition system, wherein the driving system and the image acquisition system are arranged above an additive chamber, the image acquisition system is connected with a moving part of the driving system through a steering engine, the image acquisition system shoots towards the bottom surface of the additive chamber, a spraying system and a wiping device are respectively arranged on two sides below the image acquisition system, and an openable window is arranged at the top of the additive chamber; the driving system comprises a horizontal driving mechanism, a vertical driving mechanism, a position sensor and a controller, wherein driving motors of the horizontal driving mechanism and the vertical driving mechanism are connected with the controller; the position sensor is connected with the input end of the controller.
The image acquisition system comprises a camera and an illumination light source; the camera and the illumination light source are both arranged on an output arm of the steering engine through a connecting plate, the camera is connected with an upper computer through a communication interface, the maximum rotation angle of the steering engine is 90 degrees, and the lens faces the scraper to be assisted by the illumination light source.
The openable window is provided with a transparent cover plate, the long side of the transparent cover plate is hinged with the top of the material adding chamber through a rotating shaft, and the rotating shaft of the transparent cover plate is provided with a rotating motor.
The vertical driving mechanism is arranged on a moving part of the horizontal driving mechanism, the horizontal mechanism adopts a screw rod and screw nut pair or adopts a gear rack pair, and the vertical driving mechanism adopts an electric telescopic rod or a screw rod and screw nut pair.
The scraper device moves along the powder spreading direction to spread the powder on the powder feeding platform on the forming platform, and stops moving at the position of the recovery cylinder, and the redundant powder enters the recovery cylinder.
The spray system comprises a spray head and a pressure pump, the pressure pump is connected with the spray head through a pipeline, a water guide groove is arranged below the spray head, an inlet of the pressure pump is connected with a cleaning liquid storage box, and the spray head faces to a surface to be cleaned of the image acquisition system.
The wiping device comprises wiping cloth and a rocker, the wiping cloth is arranged on the rocker, the rocker is connected with an output shaft of a motor, a blower is further arranged, and an air outlet of the blower is opposite to a surface to be cleaned of the image acquisition system.
On the other hand, the invention also provides an auxiliary monitoring method for the powder paving quality and the scraper abrasion by the monitoring device, when the scraper device finishes powder paving, the openable window is opened, the image acquisition system enters the material adding chamber to acquire images under the drive of the vertical driving mechanism, and when the images are acquired, the image acquisition system reciprocates under the drive of the horizontal driving mechanism to acquire complete powder paving images.
The powder feeding platform is lifted to a preset height, and the scraper device spreads the powder on the forming platform;
the openable window positioned above the forming platform is opened, and the image acquisition system enters the inside of the material adding chamber through the openable window; after the image acquisition system descends to a preset position of a powder layer laid on the forming table, completing image acquisition of the powder layer under the auxiliary action of an illumination light source; under the control of a steering engine, the lens is perpendicular to the powder spreading layer and faces one side of the scraper, a scraper abrasion image is collected, and the collected image is transmitted to an upper computer for analysis;
after the image acquisition is completed, the image acquisition system is isolated from the material adding chamber through the openable window waiting machine position.
The spraying system comprises a spray head and a pressure pump, the pressure pump is connected with the spray head through a pipeline, a water guide groove is arranged below the spray head, a cleaning liquid storage box is connected to an inlet of the pressure pump, the spray head faces a surface to be cleaned of the image acquisition system, cleaning liquid is sprayed onto a camera lens, then a steering engine controls the camera lens to face a wiping device, impurities and smoke on the lens are erased under the drive of a motor by wiping cloth and a rocker, and then the steering engine controls the lens to return to a waiting machine position.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention provides a powder paving quality monitoring device and method in an additive manufacturing process, wherein a driving device is used for controlling the segment position and movement of an image acquisition system before powder paving, after powder paving and during laser working, so that the free movement of the image acquisition system is realized; the powder spreading quality on the forming platform is tracked and collected in real time, the collected powder spreading information is more accurate and comprehensive, the influence of shaking on a camera due to the operation of SLM equipment is avoided, and the influence of forming vision is not limited; processing byproducts such as black smoke, slag and the like adhered to the lens in the information acquisition process of the camera are timely removed through the lens cleaning system and the wiping system, and a guarantee and a precondition are provided for the camera to continuously and stably acquire high-definition images; the device disclosed by the invention is beneficial to realizing high-precision and comprehensive monitoring of powder spreading quality and scraper abrasion condition of SLM equipment.
Drawings
Fig. 1 is a schematic and schematic diagram of a monitoring device for powder spreading quality and scraper abrasion based on an SLM.
In the drawings, 1. A drive system; 2. a powder feeding platform; 3. a forming platform; 4. an image acquisition system; 5. a spraying system; 6. a wiping device; 7. a window which can be opened and closed; 8. a part being formed; 9. an additive chamber; 10. a scraper device.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
Referring to fig. 1, the invention provides an auxiliary monitoring device for powder paving quality and scraper abrasion based on an SLM (selective laser melting), which comprises a driving system 1 and an image acquisition system 4 which are arranged above an additive chamber 9, wherein the image acquisition system 4 is connected with a moving part of the driving system 1 through a steering engine, the image acquisition system 4 shoots towards the bottom surface of the additive chamber, a spraying system 5 and a wiping device 6 are respectively arranged at two sides below the image acquisition system 4, and an openable window 7 is arranged at the top of the additive chamber 9; the driving system 1 comprises a horizontal driving mechanism, a vertical driving mechanism, a position sensor and a controller, wherein driving motors of the horizontal driving mechanism and the vertical driving mechanism are connected with the controller; the position sensor is connected with the input end of the controller.
The image acquisition system 4 comprises a camera and an illumination source; the camera and the illumination light source are both arranged on an output arm of the steering engine through a connecting plate, the camera is connected with an upper computer through a communication interface, the maximum rotation angle of the steering engine is 90 degrees, and the lens faces the scraper to be assisted by the illumination light source.
The openable window 7 is provided with a transparent cover plate, the long side of the transparent cover plate is hinged with the top of the material adding chamber 9 through a rotating shaft, and the rotating shaft of the transparent cover plate is provided with a rotating motor.
The scraper device 10, the recovery cylinder, the forming platform 3 and the powder feeding platform 2 are arranged in the material adding chamber 9, the scraper device 10 moves along the powder feeding direction to spread the powder on the powder feeding platform 2 on the forming platform 3, and the movement is stopped at the recovery cylinder, and the redundant powder enters the recovery cylinder.
The spraying system 5 comprises a spray head and a pressure pump, the pressure pump is connected with the spray head through a pipeline, a water guide groove is arranged below the spray head, an inlet of the pressure pump is connected with a cleaning liquid storage box, and the spray head faces the surface to be cleaned of the image acquisition system 4.
The wiping device 6 comprises wiping cloth and a rocker, the wiping cloth is arranged on the rocker, the rocker is connected with an output shaft of a motor, and a blower is further arranged, and an air outlet of the blower is opposite to the surface to be cleaned of the image acquisition system 4.
The vertical driving mechanism is arranged on a moving part of the horizontal driving mechanism, the horizontal driving mechanism adopts a screw rod and screw rod nut pair or adopts a gear rack pair, and the vertical driving mechanism adopts an electric telescopic rod or a screw rod and screw rod nut pair. In the screw rod and screw rod nut pair, two ends of the screw rod are fixedly arranged through screw rod installation seats, the screw rod nut moves linearly along the screw rod, a flat plate for connecting other components is arranged on the screw rod nut, and a necessary bolt hole is formed in the flat plate; the vertically arranged screw rod and screw rod nut pair is arranged on a flat plate of the screw rod nut of the horizontal driving mechanism.
The drive system 1 employs a common translation mechanism, not shown in detail in the drawings, and it is within the ability of one of ordinary skill in the art to provide different translation mechanisms to effect up-down and horizontal movement of the image acquisition system 4.
As an alternative embodiment, when the gear and the rack are in pair, a driving motor and a sliding block are arranged on the moving gear, the sliding block is arranged in a sliding rail parallel to the rack, and the sliding block is used for connecting a vertical driving mechanism. The vertical driving mechanism adopts a screw rod and a screw rod nut pair to be internally provided with a fixing frame, and the vertical driving machine is connected with the horizontal driving mechanism through the fixing frame; in the screw rod and screw rod nut pair of the vertical driving mechanism, two ends of the screw rod are arranged on the fixing frame through screw rod installation seats. Of course, the person skilled in the art will be able to know the way in which it is mounted.
The image acquisition system 4 comprises a camera, a steering engine and an illumination light source; the camera is connected with the upper computer through a transmission line, and also can be connected through a wireless communication module, and the upper computer adopts a notebook computer; the camera completes image information acquisition under the assistance of the illumination light source; the steering engine is used for controlling the image acquisition system to further horizontally move and rotating the 90-degree lens to face the scraper; the camera shoots the images and transmits the images to the image display system through the wireless network card, so that the real-time monitoring of the powder spreading quality and the scraper abrasion can be completed.
The mounting plate can be arranged on the output arm of the steering engine, a threaded hole or a camera connecting seat for connecting a camera is formed in the mounting plate, and the camera connecting seat can purchase commercial products.
The camera cleaning and protecting device comprises a spraying system 5 positioned at the left lower part of the driving system and a wiping device 6 positioned at the right lower part of the driving system; under steering engine control, the camera lens faces the spraying system 5 and the wiping device 6 in sequence, the spraying system 5 sprays cleaning liquid on the lens, and the wiping device 6 wipes the spraying liquid and the surface of the lens to finish the protection of the lens, and the cleaning of impurities and smoke.
As an alternative embodiment, the shower system 5 includes a shower head and a pressurizing pump connected to the shower head through a pipe, and an inlet of the pressurizing pump is connected to the cleaning liquid storage box
According to the method for monitoring the powder spreading quality and the scraper abrasion of the SLM equipment, after the scraper device 10 finishes powder spreading, a window is opened, the image acquisition system 4 is separated from the driving system 1, and the image acquisition system 4 enters the material adding chamber 9 to finish image acquisition, and the method is implemented according to the following steps:
step 1, a powder feeding platform 2 is lifted to a preset height, and a scraper device 10 spreads powder on a forming platform 3;
step 2, an openable window 7 positioned above the forming platform 3 is opened, the magnetism of the electromagnet 3 is weakened, the image acquisition system 4 is separated from the electromagnet 3, and the image acquisition system enters the inside of the material adding chamber 9 through the openable window 7;
step 4, partially recovering the magnetic force of the electromagnet 3, returning the image acquisition system to the driving system through the windowing, but not contacting with the electromagnet 3, closing the openable window 7, and isolating the openable window from the material adding chamber 9;
step 6, the magnetism of the electromagnet is completely recovered, and the image acquisition system is connected with the electromagnet again for resetting;
and 7, the camera shoots a photo and transmits information to the image display system through the wireless network card equipment, so that the detailed information of powder spreading and the abrasion condition of the scraper can be observed, and the real-time monitoring of the powder spreading quality and the abrasion of the scraper is completed.
Claims (10)
1. Powder paving quality and scraper wearing and tearing's auxiliary monitoring device based on SLM, its characterized in that: the automatic material adding device comprises a driving system (1) and an image collecting system (4) which are arranged above an material adding chamber (9), wherein the image collecting system (4) is connected with a moving part of the driving system (1) through a steering engine, the image collecting system (4) shoots towards the bottom surface of the material adding chamber, a spraying system (5) and a wiping device (6) are respectively arranged on two sides below the image collecting system (4), and an openable window (7) is arranged at the top of the material adding chamber (9); the driving system (1) comprises a horizontal driving mechanism, a vertical driving mechanism, a position sensor and a controller, wherein driving motors of the horizontal driving mechanism and the vertical driving mechanism are connected with the controller; the position sensor is connected with the input end of the controller.
2. An auxiliary monitoring device for powder spreading quality and doctor blade wear based on SLM according to claim 1, characterized in that the image acquisition system (4) comprises a camera and an illumination light source; the camera and the illumination light source are both arranged on an output arm of the steering engine through a connecting plate, the camera is connected with an upper computer through a communication interface, the maximum rotation angle of the steering engine is 90 degrees, and the lens faces the scraper to be assisted by the illumination light source.
3. The auxiliary monitoring device for powder spreading quality and scraper abrasion based on the SLM according to claim 1, wherein a transparent cover plate is arranged at the position of the openable window (7), the long side of the transparent cover plate is hinged with the top of the material adding chamber (9) through a rotating shaft, and a rotating motor is arranged on the rotating shaft of the transparent cover plate.
4. The auxiliary monitoring device for powder paving quality and scraper abrasion based on the SLM according to claim 1, wherein the vertical driving mechanism is arranged on a moving part of the horizontal driving mechanism, the horizontal mechanism adopts a screw rod and screw nut pair or adopts a gear rack pair, and the vertical driving mechanism adopts an electric telescopic rod or a screw rod and screw nut pair.
5. An auxiliary monitoring device for powder spreading quality and scraper wear based on SLM according to claim 1, characterized in that a scraper device (10), a recovery cylinder, a forming platform (3) and a powder feeding platform (2) are arranged in the material adding chamber (9), the scraper device (10) moves along the powder spreading direction to spread the powder on the powder feeding platform (2) onto the forming platform (3) and stops moving at the recovery cylinder, and the excess powder enters the recovery cylinder.
6. The auxiliary monitoring device for powder paving quality and scraper abrasion based on the SLM according to claim 1, wherein the spraying system (5) comprises a spray head and a pressure pump, the pressure pump is connected with the spray head through a pipeline, a water guide groove is arranged below the spray head, an inlet of the pressure pump is connected with a cleaning liquid storage box, and the spray head faces the surface to be cleaned of the image acquisition system (4).
7. The monitoring device for powder spreading quality and scraper abrasion based on the SLM according to claim 1, wherein the wiping device (6) comprises wiping cloth and a rocker, the wiping cloth is arranged on the rocker, the rocker is connected with an output shaft of a motor, and a blower is further arranged, and an air outlet of the blower faces to a surface to be cleaned of the image acquisition system (4).
8. The auxiliary monitoring method for powder paving quality and scraper abrasion based on the monitoring device according to any one of claims 1-7 is characterized in that after the scraper device finishes powder paving, an openable window (7) is opened, an image acquisition system (4) enters a material adding chamber (9) to acquire images under the driving of a vertical driving mechanism, and when images are acquired, the image acquisition system is driven by a horizontal driving mechanism to reciprocate to acquire complete powder paving images.
9. The auxiliary monitoring method according to claim 8, characterized in that the powder feeding platform (2) is raised by a preset height and the doctor device (10) spreads the powder onto the forming platform (3);
an openable window (7) positioned above the forming platform (3) is opened, and the image acquisition system (4) enters the inside of the material adding chamber (9) through the openable window (7); after the image acquisition system (4) descends to a preset position of the powder layer paved on the forming table (3), the image acquisition of the powder layer paved is completed under the auxiliary action of an illumination light source; under the control of a steering engine, the lens is perpendicular to the powder spreading layer and faces one side of the scraper, a scraper abrasion image is collected, and the collected image is transmitted to an upper computer for analysis;
after the image acquisition is completed, the image acquisition system is isolated from the material adding chamber (9) through the openable window (7) for waiting for the machine position.
10. The auxiliary monitoring method according to claim 8, wherein the spraying system (5) comprises a spray head and a pressure pump, the pressure pump is connected with the spray head through a pipeline, a water guide groove is arranged below the spray head, an inlet of the pressure pump is connected with a cleaning liquid storage box, the spray head faces the surface to be cleaned of the image acquisition system (4), the cleaning liquid is sprayed onto the camera lens, then the steering engine controls the camera lens to face the wiping device (6), the wiping cloth and the rocking rod are driven by the motor to wipe impurities and smoke on the lens, and then the steering engine controls the lens to return to the position to be cleaned.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310384220.8A CN116275112A (en) | 2023-04-11 | 2023-04-11 | Powder spreading quality and scraper abrasion monitoring device and method based on SLM |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310384220.8A CN116275112A (en) | 2023-04-11 | 2023-04-11 | Powder spreading quality and scraper abrasion monitoring device and method based on SLM |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117020236A (en) * | 2023-10-10 | 2023-11-10 | 康硕(山西)智能制造有限公司 | Scraping flat base for metal 3D printing |
| CN117358662A (en) * | 2023-12-04 | 2024-01-09 | 江苏瑞振压铸有限公司 | Cleaning device for die casting machine |
-
2023
- 2023-04-11 CN CN202310384220.8A patent/CN116275112A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117020236A (en) * | 2023-10-10 | 2023-11-10 | 康硕(山西)智能制造有限公司 | Scraping flat base for metal 3D printing |
| CN117020236B (en) * | 2023-10-10 | 2024-01-02 | 康硕(山西)智能制造有限公司 | Scraping flat base for metal 3D printing |
| CN117358662A (en) * | 2023-12-04 | 2024-01-09 | 江苏瑞振压铸有限公司 | Cleaning device for die casting machine |
| CN117358662B (en) * | 2023-12-04 | 2024-02-23 | 江苏瑞振压铸有限公司 | Cleaning device for die casting machine |
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