In-situ real-time measurement device for temperature and deformation in melting process of laser powder bed

Abstract

The invention relates to an in-situ real-time measurement device for temperature and deformation in the melting process of a laser powder bed, and the device comprises a substrate; the printing module is used for melting metal powder and at least one laser process parameter through at least one scanning strategy based on a preset part CAD model, and printing the molten metal powder layer by layer; the in-situ real-time measurement system is used for measuring temperature data of the substrate in the melting printing process of the laser powder bed and deformation data in a preset direction, respectively generating curves corresponding to the temperature data and the deformation data, and evaluating the influence of at least one scanning strategy and / or one laser process parameter on the substrate based on the real-time data curve, so as to obtain a real-time measurement result; and generating an in-situ real-time evaluation result in the melting process of the laser powder bed. Therefore, the problems that temperature and deformation data in the selective laser melting process cannot be obtained in real time in the prior art, and process optimization is difficult to effectively guide are solved.

Description

Technical Field

[0001] The present application relates to the technical field of laser powder bed melting additive manufacturing, and in particular to an in-situ real-time measurement device for temperature and deformation during laser powder bed melting. Background Art

[0002] Laser Powder Bed Fusion (LPBF) prints 3D parts by spreading powder layer by layer and laser melting the powdered material. However, due to the huge thermal gradient generated during the laser melting process, thermal residual stress and deformation often occur inside the parts, resulting in a decrease in part quality or even failure. Therefore, it is of great significance to design a method and system that can measure temperature and deformation in real time during the LPBF process.

[0003] In the related technology, a powder suction nozzle can be used to suck out the powder at the position to be embedded according to the coordinate information of the position to be embedded, and then the stress and strain measuring device is sucked by an electromagnet and placed in the position to be embedded, so as to realize in-situ measurement of stress and strain at the interface of multiple materials during the forming process of the multi-material structure.

[0004] However, in the related art, since the LPBF printing process requires the cavity to be strictly sealed and the powder always covers the printing area, it is difficult to achieve in-situ measurement of the temperature and deformation of the LPBF process. The traditional offline measurement method cannot obtain the temperature and deformation data during the printing process in real time, and it is difficult to effectively guide process optimization, which urgently needs to be improved. Summary of the invention

[0005] The present application provides an in-situ real-time measurement device for temperature and deformation during laser powder bed melting to solve the problem in the related art that, since the LPBF printing process requires strict sealing of the cavity and the powder always covers the printing area, it is difficult to achieve in-situ measurement of temperature and deformation during the LPBF process, and the traditional off-line measurement method cannot obtain the temperature and deformation data during the laser selective melting process in real time, making it difficult to effectively guide process optimization.

[0006] The first aspect of the present application provides an in-situ real-time measurement device for temperature and deformation during laser powder bed melting, comprising: a substrate; a printing module, for performing a laser powder bed melting operation on metal powder based on a preset part CAD model through at least one scanning strategy to obtain melted metal powder, and printing the melted metal powder layer by layer; an in-situ real-time measurement system, for measuring temperature change data of the substrate and deformation data in a preset direction during laser powder bed melting printing, and respectively generating a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data, and based on the real-time deformation data curve and the real-time temperature data curve, evaluating the influence of the at least one scanning strategy and / or the laser parameters corresponding to the laser powder bed melting operation on the substrate, so as to generate an in-situ real-time evaluation result during the laser powder bed melting printing process.

[0007] Optionally, in one embodiment of the present application, the printing module includes: a substrate fixing plate, the measuring cavity is installed above the substrate fixing plate; and an adapter plate, the adapter plate is arranged corresponding to the substrate and the measuring cavity, and is used to support the substrate.

[0008] Optionally, in one embodiment of the present application, the in-situ real-time measurement system includes: at least one measuring sensor for measuring the deformation data of the substrate in a preset direction during the laser powder bed fusion printing process; at least one K-type thermocouple for measuring the temperature change data of the substrate during the laser powder bed fusion printing process; a data acquisition module for receiving the deformation data and the temperature change data in real time, and performing preset analysis and processing on the deformation data and the temperature change data to generate a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data, respectively.

[0009] Optionally, in one embodiment of the present application, the at least one scanning strategy includes a Z-type scanning strategy, an S-type scanning strategy and a rotational scanning strategy.

[0010] Optionally, in one embodiment of the present application, the data acquisition module includes: a signal demodulator, used to receive deformation data acquired by the at least one measuring sensor in real time, and perform signal demodulation on the deformation data; a temperature input module, used to receive temperature change data monitored in real time by the at least one K-type thermocouple; a data analysis unit, used to perform data analysis operations on the deformation data and the temperature change data after signal demodulation, so as to generate the real-time deformation data curve and the real-time temperature data curve; an evaluation unit, used to evaluate the influence of the at least one scanning strategy and / or the laser parameters corresponding to the laser powder bed melting operation on the substrate based on the real-time deformation data curve and the real-time temperature data curve, so as to generate an in-situ real-time evaluation result during the laser powder bed melting printing process.

[0011] The second aspect of the present application provides an in-situ real-time measurement method for temperature and deformation during laser powder bed melting, comprising the following steps: based on a preset part CAD model, performing a laser powder bed melting operation on metal powder through at least one scanning strategy to obtain melted metal powder, and printing the melted metal powder layer by layer; measuring the temperature change data of the substrate and the deformation data in a preset direction during the laser powder bed melting printing process, and respectively generating a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data; based on the real-time deformation data curve and the real-time temperature data curve, evaluating the influence of the at least one scanning strategy and / or the laser parameters corresponding to the laser powder bed melting operation on the substrate, so as to generate an in-situ real-time evaluation result during the laser powder bed melting printing process.

[0012] Optionally, in one embodiment of the present application, the at least one scanning strategy includes a Z-type scanning strategy, an S-type scanning strategy and a rotational scanning strategy.

[0013] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the in-situ real-time measurement method of temperature and deformation during laser powder bed melting as described in the above embodiment.

[0014] The fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When the program is executed by a processor, it implements the above-mentioned in-situ real-time measurement method of temperature and deformation during laser powder bed melting.

[0015] The fifth aspect of the present application provides a computer program product, which stores a computer program that, when executed by a processor, implements the above-mentioned in-situ real-time measurement method of temperature and deformation during laser powder bed melting.

[0016] The embodiment of the present application designs a closed measurement system to achieve real-time and accurate measurement of temperature and deformation during the printing process without changing the original structure and operating conditions of the LPBF machine. This solves the problem in the related art that it is difficult to measure the temperature and deformation of the LPBF process in situ because the LPBF printing process requires the cavity to be strictly sealed and the powder always covers the printing area, and the traditional offline measurement method cannot obtain the temperature and deformation data in the laser selective melting process in real time, making it difficult to effectively guide process optimization.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a schematic structural diagram of an in-situ real-time measurement device for temperature and deformation during laser powder bed melting according to an embodiment of the present application;

[0020] Figure 2 A top view of an in-situ real-time measurement system provided according to an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the position of an in-situ real-time measurement system in a LPBF printer chamber according to an embodiment of the present application;

[0022] Figure 4 A side view of an in-situ real-time measurement system provided according to one embodiment of the present application;

[0023] Figure 5 A schematic diagram of a variation of an LPBF printing process provided according to an embodiment of the present application;

[0024] Figure 6 A schematic diagram of an execution flow of in-situ measurement of temperature and deformation during LPBF printing provided according to an embodiment of the present application;

[0025] Figure 7 A schematic diagram of temperature data measured by an in-situ real-time measurement system under rotational scanning and Z-scanning according to an embodiment of the present application;

[0026] Figure 8 A schematic diagram of deformation data measured by an in-situ real-time measurement system under rotational scanning and Z-scanning according to an embodiment of the present application;

[0027] Fig. 9 A schematic diagram of temperature measurement data and simulation data under a rotational scanning strategy provided according to an embodiment of the present application;

[0028] Fig.10 A schematic diagram of measurement data and simulation data of deformation under a rotational scanning strategy provided according to an embodiment of the present application;

[0029] Fig.11 A flow chart of an in-situ real-time measurement method of temperature and deformation during laser powder bed melting provided in accordance with an embodiment of the present application;

[0030] Fig.12 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] The following describes the in-situ real-time measurement device of temperature and deformation during the laser powder bed melting process of the embodiment of the present application with reference to the accompanying drawings. In view of the related art mentioned in the above background technology, since the LPBF printing process requires the cavity to be strictly sealed and the powder is always covered on the printing area, it is difficult to measure the temperature and deformation of the LPBF process in situ, and the traditional offline measurement method cannot obtain the temperature and deformation data of the printing process in real time, and it is difficult to effectively guide the process optimization. The present application provides an in-situ real-time measurement device for temperature and deformation during the laser powder bed melting process. In the device, by designing a closed measurement system, the real-time and accurate measurement of the temperature and deformation during the printing process is achieved without changing the original structure and operating conditions of the LPBF machine. Thus, the problem in the related art that since the LPBF printing process requires the cavity to be strictly sealed and the powder is always covered on the printing area, it is difficult to measure the temperature and deformation of the LPBF process in situ, and the traditional offline measurement method cannot obtain the temperature and deformation data of the laser selective melting process in real time, and it is difficult to effectively guide the process optimization is solved.

[0033] Specifically, Figure 1A schematic diagram of the structure of an in-situ real-time measurement device for temperature and deformation during laser powder bed melting provided in an embodiment of the present application.

[0034] like Figure 1 As shown, the in-situ real-time measurement device 10 for temperature and deformation during laser powder bed melting includes: a substrate 100, a printing module 200 and an in-situ real-time measurement system 300.

[0035] Specifically, substrate 100 .

[0036] The printing module 200 is used to perform a laser powder bed melting operation on metal powder based on a preset part CAD model through at least one scanning strategy to obtain melted metal powder, and print the melted metal powder layer by layer.

[0037] The in-situ real-time measurement system 300 is used to measure the temperature change data and deformation data of the substrate in a preset direction during the laser powder bed fusion printing process, and to generate a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data, respectively. Based on the real-time deformation data curve and the real-time temperature data curve, the system evaluates the influence of at least one scanning strategy and / or laser parameters corresponding to the laser powder bed fusion operation on the substrate, so as to generate an in-situ real-time evaluation result during the laser powder bed fusion printing process.

[0038] The embodiments of the present application may firstly melt metal powder in a printing module 200 through a plurality of scanning strategies based on a preset part CAD model to generate melted metal powder, and print the melted metal powder layer by layer; thereafter, the embodiments of the present application may measure the temperature change data of the substrate and the deformation data in a preset direction (such as the Z direction) during the laser powder bed melting printing process in a measuring chamber through an in-situ real-time measurement system 300, and analyze and process the deformation data and the temperature change data, so as to generate a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data.

[0039] Optionally, in one embodiment of the present application, the printing module 200 includes: a substrate fixing plate and a transfer plate.

[0040] Wherein, the substrate fixing plate and the measuring cavity are installed above the substrate fixing plate.

[0041] The adapter plate is arranged corresponding to the substrate and the measuring cavity and is used to support the substrate.

[0042] It should be noted that the measuring chamber in the embodiment of the present application can be designed as a detachable structure so that it can be adapted and installed in the printing platform of a variety of LPBF printers without any modification to the machine; in addition, the measuring chamber adopts a sealed design to prevent the splash of metal powder during laser processing from damaging the measuring equipment or affecting the measurement accuracy.

[0043] In the specific implementation process, a thin substrate is designed on the top of the measuring cavity as a temporary substrate during the printing process. The metal powder is laid on its upper surface, and the lower surface is used to install the measuring equipment. An adapter plate is designed between the thin substrate and the measuring cavity, which can be used to support the thin substrate. The thin substrate and the adapter plate are fixed by flat head screws, and the two plates are parallel; the conical screws are used to point support the thin substrate, minimize the contact force between the thin substrate and the adapter plate, and minimize the impact on the deformation of the thin substrate. The positions of the flat head screws and the conical screws are as follows: Figure 2 shown.

[0044] Optionally, in one embodiment of the present application, at least one scanning strategy includes a Z-type scanning strategy, an S-type scanning strategy, and a rotational scanning strategy.

[0045] In the actual implementation process, the embodiment of the present application can first install the measuring cavity on the LPBF printer substrate fixing plate, such as Figure 3 As shown, and ensure its good sealing; secondly, the embodiment of the present application can import the part CAD model into the LPBF printer, so that the LPBF printer can select different scanning strategies (such as Z-type, S-type, and rotational type) to melt the metal powder for layer-by-layer printing.

[0046] Optionally, in one embodiment of the present application, the in-situ real-time measurement system 300 includes: at least one measurement sensor, at least one K-type thermocouple and a data acquisition module.

[0047] Among them, at least one measuring sensor is used to measure the deformation data of the substrate in a preset direction during the laser powder bed fusion printing process.

[0048] At least one K-type thermocouple is used to measure the temperature change data of the substrate during the laser powder bed fusion printing process.

[0049] The data acquisition module is used to receive deformation data and temperature change data in real time, and perform preset analysis and processing on the deformation data and temperature change data to generate a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data respectively.

[0050] In addition, if Figure 4As shown, in the embodiment of the present application, the in-situ real-time measurement system 300 in the measurement chamber mainly includes components such as at least one measurement sensor, at least one K-type thermocouple and a data acquisition module.

[0051] Specifically, in the embodiment of the present application, one or more displacement measurement sensors (DVRT) can be installed on the lower surface of the printing area on the thin substrate to measure the deformation data during the printing process in real time, wherein the deformation of the LPBF printing process is as follows: Figure 5 As shown; in addition, the embodiment of the present application can also install 2 or more K-type thermocouples at appropriate positions on the lower surface of the thin substrate to monitor the temperature changes of the substrate and its surrounding environment during the printing process in real time.

[0052] Therefore, the embodiment of the present application can use DVRT to record the deformation data of the thin substrate in the Z direction during the printing process in real time, and use K-type thermocouples to monitor the temperature changes of the thin substrate in real time; thereafter, the embodiment of the present application can receive signals from the DVRT and thermocouples in real time through the data acquisition module, and process and analyze them to generate a real-time data curve of deformation data and temperature change data.

[0053] Optionally, in one embodiment of the present application, the data acquisition module includes: a signal demodulator, a temperature input module, a data analysis unit and an evaluation unit.

[0054] The signal demodulator is used to receive deformation data acquired in real time by at least one measuring sensor and perform signal demodulation on the deformation data.

[0055] The temperature input module is used to receive temperature change data monitored in real time by at least one K-type thermocouple.

[0056] The data analysis unit is used to perform data analysis operations on the deformation data and temperature change data after signal demodulation to generate a real-time deformation data curve and a real-time temperature data curve.

[0057] An evaluation unit is used to evaluate the influence of at least one scanning strategy and / or laser parameters corresponding to the laser powder bed fusion operation on the substrate based on the real-time deformation data curve and the real-time temperature data curve, so as to generate an in-situ real-time evaluation result during the laser powder bed fusion printing process.

[0058] It should be noted that, in the embodiment of the present application, the data acquisition module also includes components such as a signal demodulator, a temperature input module, a data analysis unit and an evaluation unit.

[0059] As a feasible method, after obtaining the deformation data in the Z direction through multiple measurement sensors (DVRT), the embodiment of the present application can also use the DVRT to connect with the data analysis unit through the signal demodulator, so as to perform signal demodulation on the deformation data and realize real-time data collection and processing; similarly, in the embodiment of the present application, the thermocouple can also be connected to the data analysis unit through the temperature input module, such as Figure 6 As shown, real-time acquisition of temperature change data is ensured.

[0060] Afterwards, the embodiment of the present application can use the generation module to perform data analysis on the deformation data and temperature change data after signal demodulation, thereby generating a real-time deformation data curve and a real-time temperature data curve, providing reliable data guidance and basis for the subsequent evaluation of the impact of scanning strategies, laser parameters, etc. on the deformation and temperature changes of the thin substrate.

[0061] In the actual implementation process, after the printing is completed, the embodiment of the present application can remove the measurement chamber from the LPBF machine, and further analyze the collected data through the evaluation unit to evaluate the influence of the scanning strategy, laser parameters, etc. on the deformation and temperature change of the thin substrate.

[0062] The following is a test and analysis of the performance of the in-situ real-time measurement device for temperature and deformation during the laser powder bed melting process of the present application in combination with the accompanying drawings.

[0063] Figure 7 It is a schematic diagram of the temperature data measured by the in-situ real-time measurement system under rotation scanning and Z-scanning; Figure 8 The figure is a schematic diagram of the deformation data measured by the in-situ real-time measurement system under rotational scanning and Z-scanning. Figure 7 and Figure 8 As shown, the in-situ real-time measurement device for temperature and deformation during laser powder bed melting of the present application can optimize the scanning strategy and process parameters by real-time measuring the difference in temperature and deformation data of the printing process when implementing different scanning strategies.

[0064] Fig. 9 It is a schematic diagram of the temperature measurement data and simulation data under the rotation scanning strategy; Fig.10 The figure is a schematic diagram of the measured data and simulation data of deformation under the rotational scanning strategy. Fig. 9 and Fig.10 As shown, the temperature and deformation data measured by the in-situ real-time measurement device of temperature and deformation during the laser powder bed melting process of the present application are in good agreement with the simulation data (error <10%), thereby verifying the effectiveness of the designed in-situ real-time measurement system and providing an important reference for the verification of the simulation model.

[0065] According to the in-situ real-time measurement device for temperature and deformation during laser powder bed melting proposed in the embodiment of the present application, a closed measurement system is designed to achieve real-time and accurate measurement of temperature and deformation during printing without changing the original structure and operating conditions of the LPBF machine. This solves the problem in the related art that it is difficult to measure the temperature and deformation of the LPBF process in-situ because the LPBF printing process requires the cavity to be strictly sealed and the powder always covers the printing area, and the traditional offline measurement method cannot obtain the temperature and deformation data during laser selective melting in real time, making it difficult to effectively guide process optimization.

[0066] Next, the in-situ real-time measurement method of temperature and deformation during laser powder bed melting according to an embodiment of the present application is described with reference to the accompanying drawings.

[0067] Fig.11 It is a flow chart of the in-situ real-time measurement method of temperature and deformation during laser powder bed melting according to an embodiment of the present application.

[0068] like Fig.11 As shown, the in-situ real-time measurement method of temperature and deformation during laser powder bed melting includes the following steps:

[0069] In step S1101, based on a preset part CAD model, a laser powder bed melting operation is performed on metal powder by at least one scanning strategy to obtain melted metal powder, and the melted metal powder is printed layer by layer.

[0070] In step S1102, the temperature change data and the deformation data of the substrate in a preset direction during the laser powder bed fusion printing process are measured, and a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data are generated respectively.

[0071] In step S1103, based on the real-time deformation data curve and the real-time temperature data curve, the influence of at least one scanning strategy and / or laser parameters corresponding to the laser powder bed melting operation on the substrate is evaluated to generate an in-situ real-time evaluation result during the laser powder bed melting printing process.

[0072] Optionally, in one embodiment of the present application, at least one scanning strategy includes a Z-type scanning strategy, an S-type scanning strategy, and a rotational scanning strategy.

[0073] It should be noted that the aforementioned explanation of the embodiment of the in-situ real-time measurement device for temperature and deformation during laser powder bed melting is also applicable to the in-situ real-time measurement method for temperature and deformation during laser powder bed melting of this embodiment, and will not be repeated here.

[0074] According to the in-situ real-time measurement method of temperature and deformation during laser powder bed melting proposed in the embodiment of the present application, a closed measurement system is designed to achieve real-time and accurate measurement of temperature and deformation during printing without changing the original structure and operating conditions of the LPBF machine. This solves the problem in the related art that it is difficult to measure the temperature and deformation of the LPBF process in-situ because the LPBF printing process requires the cavity to be strictly sealed and the powder always covers the printing area, and the traditional offline measurement method cannot obtain the temperature and deformation data during laser selective melting in real time, making it difficult to effectively guide process optimization.

[0075] Fig.12 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0076] A memory 1201 , a processor 1202 , and a computer program stored in the memory 1201 and executable on the processor 1202 .

[0077] When the processor 1202 executes the program, the in-situ real-time measurement method of temperature and deformation during laser powder bed melting provided in the above embodiment is implemented.

[0078] Furthermore, the electronic device further comprises:

[0079] The communication interface 1203 is used for communication between the memory 1201 and the processor 1202 .

[0080] The memory 1201 is used to store computer programs that can be executed on the processor 1202 .

[0081] The memory 1201 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0082] If the memory 1201, the processor 1202 and the communication interface 1203 are implemented independently, the communication interface 1203, the memory 1201 and the processor 1202 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.12Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0083] Optionally, in a specific implementation, if the memory 1201, the processor 1202 and the communication interface 1203 are integrated on a chip, the memory 1201, the processor 1202 and the communication interface 1203 can communicate with each other through an internal interface.

[0084] The processor 1202 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0085] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned in-situ real-time measurement method of temperature and deformation during laser powder bed melting.

[0086] An embodiment of the present application also provides a computer program product on which a computer program is stored. When the program is executed by a processor, the above-mentioned in-situ real-time measurement method of temperature and deformation during laser powder bed melting is implemented.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

Claims

1. An in-situ real-time measurement device for temperature and deformation during laser powder bed melting, characterized in that: include: substrate; A printing module, used for performing a laser powder bed melting operation on metal powder by at least one scanning strategy based on a preset part CAD model to obtain melted metal powder, and printing the melted metal powder layer by layer; An in-situ real-time measurement system is used to measure the temperature change data of the substrate and the deformation data in a preset direction during the laser powder bed fusion printing process, and to generate a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data, respectively; and based on the real-time deformation data curve and the real-time temperature data curve, evaluate the influence of the at least one scanning strategy and / or the laser parameters corresponding to the laser powder bed fusion operation on the substrate, so as to generate an in-situ real-time evaluation result during the laser powder bed fusion printing process.

2. The in-situ real-time measurement device for temperature and deformation during laser powder bed melting according to claim 1, characterized in that: The printing module comprises: A substrate fixing plate, the measuring chamber is installed above the substrate fixing plate; An adapter plate is arranged corresponding to the substrate and the measuring cavity, and is used to support the substrate.

3. The in-situ real-time measurement device for temperature and deformation during laser powder bed melting according to claim 1, characterized in that: The in-situ real-time measurement system comprises: at least one measuring sensor for measuring deformation data of the substrate in a preset direction during the laser powder bed fusion printing process; at least one K-type thermocouple, used to measure temperature variation data of the substrate during the laser powder bed fusion printing process; The data acquisition module is used to receive the deformation data and the temperature change data in real time, and perform preset analysis and processing on the deformation data and the temperature change data to generate a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data respectively.

4. The in-situ real-time measurement device for temperature and deformation during laser powder bed melting according to claim 1, characterized in that: The at least one scanning strategy includes a Z-type scanning strategy, an S-type scanning strategy and a rotational scanning strategy.

5. The in-situ real-time measurement device for temperature and deformation during laser powder bed melting according to claim 3, characterized in that: The data acquisition module comprises: a signal demodulator, configured to receive deformation data acquired in real time by the at least one measuring sensor, and perform signal demodulation on the deformation data; A temperature input module, used to receive temperature change data monitored in real time by the at least one K-type thermocouple; A data analysis unit, used for performing data analysis operations on the deformation data and the temperature change data after signal demodulation to generate the real-time deformation data curve and the real-time temperature data curve; An evaluation unit is used to evaluate the influence of the at least one scanning strategy and / or the laser parameters corresponding to the laser powder bed melting operation on the substrate based on the real-time deformation data curve and the real-time temperature data curve, so as to generate an in-situ real-time evaluation result during the laser powder bed melting printing process.

6. An in-situ real-time measurement method for temperature and deformation during laser powder bed melting, characterized in that: Using the in-situ real-time measurement device for temperature and deformation during laser powder bed melting as described in any one of claims 1 to 5, the method comprises the following steps: Based on a preset part CAD model, performing a laser powder bed melting operation on metal powder by at least one scanning strategy to obtain melted metal powder, and printing the melted metal powder layer by layer; Measuring temperature change data and deformation data of the substrate in a preset direction during laser powder bed fusion printing, and generating a real-time deformation data curve and a real-time temperature data curve corresponding to the deformation data and the temperature change data respectively; Based on the real-time deformation data curve and the real-time temperature data curve, the influence of the at least one scanning strategy and / or the laser parameters corresponding to the laser powder bed melting operation on the substrate is evaluated to generate an in-situ real-time evaluation result during the laser powder bed melting printing process.

7. The in-situ real-time measurement method of temperature and deformation during laser powder bed melting according to claim 6, characterized in that: The at least one scanning strategy includes a Z-type scanning strategy, an S-type scanning strategy and a rotational scanning strategy.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the in-situ real-time measurement method of temperature and deformation during laser powder bed melting as described in any one of claims 6 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the in-situ real-time measurement method of temperature and deformation during laser powder bed melting as described in any one of claims 6-7.

10. A computer program product, comprising a computer program, characterized in that The computer program is executed to implement the in-situ real-time measurement method of temperature and deformation during laser powder bed melting as described in any one of claims 6-7.

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