阅读说明：本技术 一种增材制造设备风场校验系统及方法 (Additive manufacturing equipment wind field calibration system and method ) 是由 吴冬冬 钱远宏 刘莹莹 焦世坤 宋国华 许旭鹏 陈荣 刘程程 于 2020-12-08 设计创作，主要内容包括：本发明涉及一种增材制造设备风场校验系统及方法,包括出风口、成形幅面、风速采集器、同批风速采集点位、进风口、信号线、速度信号处理器和风速数据分析器。其中所述出风口为所述增材制造设备惰性气体的出风口,所述进风口为所述增材制造设备惰性气体的进风口,所述成形幅面为所述增材制造设备的风速待测区域；所述风速采集器为风速信息采集器,用于采集所述成形幅面的风速采集点位处的风速。本发明的系统可以准确高效地对增材制造设备风场风速大小及均匀性作出判断,指导设备调试及验收,保障成形过程的稳定性,提高成形产品的质量。(The invention relates to a wind field calibration system and method of additive manufacturing equipment. The air outlet is an inert gas outlet of the additive manufacturing equipment, the air inlet is an inert gas inlet of the additive manufacturing equipment, and the forming breadth is an area to be measured by the air speed of the additive manufacturing equipment; the wind speed collector is a wind speed information collector and is used for collecting the wind speed at the wind speed collection point position of the forming breadth. The system can accurately and efficiently judge the wind speed and the uniformity of the wind field of the additive manufacturing equipment, guide the debugging and acceptance of the equipment, ensure the stability of the forming process and improve the quality of formed products.)

1. The wind field calibration system of the additive manufacturing equipment is characterized by comprising an air outlet (1), a forming breadth (2), a wind speed collector (3), a same-batch wind speed collection point (4), an air inlet (5), a signal line (6), a speed signal processor (7) and a wind speed data analyzer (8); the air outlet (1) is an inert gas outlet of the additive manufacturing equipment, the air inlet (5) is an inert gas inlet of the additive manufacturing equipment, and the forming breadth (2) is an area to be measured by wind speed of the additive manufacturing equipment; the wind speed collector (3) is a wind speed information collector and is used for collecting the wind speed at the wind speed collection point of the forming breadth (2).

2. The additive manufacturing apparatus wind farm verification system of claim 1, wherein the additive manufacturing apparatus is a laser selective melting forming apparatus or a laser selective sintering forming apparatus.

3. The additive manufacturing apparatus wind farm verification system of claim 1, wherein: the inert gas is one or more of helium, argon or neon.

4. Additive manufacturing plant wind park verification system according to claim 1 or 2, wherein the dimensions of the forming web (2) are set to 250mm x 250 mm.

5. The additive manufacturing equipment wind farm verification system according to claim 4, wherein the bit spacing of the same batch of wind speed collection points (4) is 50mm, and the line spacing of the batch-to-batch wind speed collection points is 50 mm.

6. The additive manufacturing apparatus wind farm verification system of claim 5, wherein a single batch wind speed acquisition time is not less than 4-6 h.

7. The additive manufacturing equipment wind farm verification system according to claim 1, wherein the maximum profile dimensions of the wind speed collector (3) should not be more than 5mm x 5mm in length, width, height.

8. The additive manufacturing equipment wind field calibration system according to claim 7, wherein the wind speed collector (3) is a wind speed information collector, and a plurality of wind speed collectors are arranged on the forming breadth (2) according to the wind speed at the position of the point to be measured, and each wind speed collector corresponds to one wind speed collection point.

9. The additive manufacturing equipment wind field calibration system according to claim 7, wherein the wind speed collector (3) is cylindrical and has a maximum profile dimension of Φ 3mm x 5 mm.

10. A verification method using the additive manufacturing apparatus wind farm verification system of any one of claims 1-9, comprising the steps of:

firstly, opening an inert gas circulation container, enabling inert gas to enter a forming chamber for accommodating additive manufacturing equipment through an air outlet (1), blowing wind formed by the inert gas to the forming web (2) and the wind speed collector (3) and enabling the wind to flow out of the forming chamber through the air inlet (5);

secondly, the wind speed collector (3) collects speed information when wind blows over, the signal wire (6) transmits the wind speed information collected by the wind speed collector (3) to the speed signal processor (7), the speed signal processor (7) processes speed signals to obtain processed data, and then the processed data are transmitted to the wind speed data analyzer (8);

finally, the wind speed data analyzer (8) analyzes the wind speed of different collection point positions, wind speed deviations of the different wind speed collection point positions are obtained through calculation, and the deviation is adopted to represent the wind field uniformity of the forming breadth (2).

Technical Field

The invention relates to a wind field calibration system and method for additive manufacturing equipment, and belongs to the field of wind field calibration.

Background

The laser additive manufacturing technology adopts a discretization means point-by-point or layer-by-layer accumulation forming principle to realize the non-mold rapid manufacturing of parts, and thoroughly changes the processing modes of traditional parts, in particular high-performance difficult-to-process materials, large-size thin-wall complex configurations, hollow lattices and topological bionic structures.

The existing additive manufacturing technology has high requirements on the design of an additive manufacturing process on one hand and has high requirements on the stability of equipment on the other hand. The air field uniformity and stability of the additive manufacturing equipment have great influence on molten pool protection, molten pool splashing and spatter blowing-off and blowing-off forming breadth in the forming process, and have great influence on the internal quality, forming performance and quality uniformity of a formed product, especially aiming at the selective laser melting forming and selective laser sintering forming processes, and when the air field uniformity and stability are poor, the molten pool splashing is easily caused, and the spatter which cannot be effectively blown away falls onto the surface of the formed product, therefore, when the next layer is formed, because the laser power is low, the larger particle spatter cannot be effectively melted, so that defects such as holes and incomplete fusion are easily formed in the forming process.

Disclosure of Invention

The invention aims to provide a wind field calibration system and method for additive manufacturing equipment.

A wind field calibration system of additive manufacturing equipment comprises an air outlet, a forming breadth, a wind speed collector, same-batch wind speed collection point positions, an air inlet, a signal line, a speed signal processor and a wind speed data analyzer; the air outlet is an inert gas outlet of the additive manufacturing equipment, the air inlet is an inert gas inlet of the additive manufacturing equipment, and the forming breadth is an area to be measured by the air speed of the additive manufacturing equipment; the wind speed collector is a wind speed information collector and is used for collecting wind speed at a wind speed collection point position of the forming breadth.

Further, the additive manufacturing apparatus is a selective laser melting forming apparatus or a selective laser sintering forming apparatus.

Further, the inert gas is one or more of helium, argon or neon.

Further, the dimensions of the forming web are set to 250mm x 250 mm.

Further, the position spacing of the wind speed collection point positions in the same batch is 50mm, and the line spacing of the wind speed collection point positions in the batches is 50 mm.

Further, the single-batch wind speed acquisition time is not less than 4-6 h.

Further, the maximum profile size of the wind speed collector is not more than 5mm multiplied by 5 mm.

Furthermore, the wind speed collector is a wind speed information collector, a plurality of wind speed collectors are arranged on the forming breadth according to the wind speed at the position of the point to be measured, and each wind speed collector corresponds to one wind speed collection point.

Further, the wind speed collector is cylindrical, and the maximum outline size is phi 3mm multiplied by 5 mm.

Further, the invention also provides a verification method of the wind field verification system of the additive manufacturing equipment, which comprises the following steps: firstly, opening an inert gas circulation container, enabling inert gas to enter a forming chamber for accommodating additive manufacturing equipment through an air outlet, blowing wind formed by the inert gas to the forming web and the wind speed collector to flow out of the forming chamber through the air inlet;

secondly, the wind speed collector collects speed information when wind blows, the signal wire transmits the wind speed information collected by the wind speed collector to the speed signal processor, the speed signal processor processes the speed signal to obtain processed data, and the processed data are transmitted to the wind speed data analyzer;

finally, the wind speed data analyzer analyzes the wind speed of different collection point positions, the wind speed deviation of the different wind speed collection point positions is obtained through calculation, and the deviation is adopted to represent the wind field uniformity of the forming breadth.

The invention has the advantages of

The wind field calibration system for the additive manufacturing equipment can accurately and efficiently judge the wind speed and the uniformity of the wind field of the additive manufacturing equipment, changes the mode that the wind field of the additive manufacturing equipment is calibrated by experience according to the splashing state of splashes in the actual printing process of additive manufacturing in the prior art, can obtain the wind speed of each wind speed acquisition point through the wind field of the wind field calibration system for the additive manufacturing equipment, can obtain parameters such as the uniformity of the whole wind field of a forming plane through data analysis, can accurately realize the satisfiability characterization of the wind field of the additive manufacturing equipment by adopting a digital method, further guides equipment debugging and acceptance, ensures the stability of the forming process and improves the quality of a formed product.

In addition, the structural design of an air duct system of the additive manufacturing equipment is further optimized by accurately monitoring the wind speed and the uniformity of the wind field of the additive manufacturing equipment and combining an aerodynamic analysis method, and the uniformity of the wind field of the additive manufacturing equipment is improved.

Drawings

FIG. 1 is a schematic view of an additive manufacturing equipment wind farm verification system;

FIG. 2 is a schematic diagram of the arrangement of wind speed collection points.

In the figure: 1. the wind speed data acquisition system comprises an air outlet, a forming breadth 2, a wind speed acquisition unit 3, a same batch wind speed acquisition unit 4, an air inlet 5, a signal line 6, a speed signal processor 7 and a wind speed data analyzer 8.

Detailed Description

In order to better understand the technical solution of the present invention, the present disclosure includes but is not limited to the following detailed description, and similar techniques and methods should be considered as within the scope of the present invention. In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

It should be understood that the described embodiments of the invention are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

As shown in fig. 1, an embodiment of the present invention provides an additive manufacturing equipment wind field calibration system and method. The wind field calibration system of the additive manufacturing equipment comprises an air outlet 1, a forming breadth 2, a wind speed collector 3, a same-batch wind speed collection point 4, an air inlet 5, a signal line 6, a speed signal processor 7 and a wind speed data analyzer 8. The air outlet 1 is an inert gas outlet of the additive manufacturing equipment, the air inlet 5 is an inert gas inlet of the additive manufacturing equipment, and the forming breadth 2 is an effective forming plane of the additive manufacturing equipment, namely an actual printing forming area and an area to be measured by wind speed; the wind speed collector 3 is a wind speed information collector and is used for collecting wind speeds at wind speed collection points of the forming breadth 2, a plurality of wind speed collectors are arranged on the forming breadth 2, each wind speed collector corresponds to one wind speed collection point, therefore, as shown in the attached drawing 2, a plurality of wind speed collection points are correspondingly arranged, so that a plurality of batches of wind speed collection points and a plurality of same batch of wind speed collection points 4 are formed, and the wind speed collectors 3 and the wind speed collection points are all arranged on the forming breadth 2. In the process of checking by adopting the wind field checking system of the additive manufacturing equipment, firstly, opening an inert gas circulation container, enabling inert gas to enter a forming chamber for accommodating the additive manufacturing equipment through an air outlet 1, blowing wind formed by the inert gas over a forming breadth 2 and a wind speed collector 3, and enabling the wind to flow out of the forming chamber through an air inlet 5; the wind speed collector 3 collects speed information when wind blows, the signal wire 6 transmits the wind speed information collected by the wind speed collector 3 to the speed signal processor 7, the speed signal processor 7 processes the speed signal to obtain processed data, the processed data are transmitted to the wind speed data analyzer 8, finally the wind speed data analyzer 8 analyzes the wind speed of different collection point positions, wind speed deviations of different wind speed collection point positions are obtained through calculation, and the deviation is adopted to represent the wind field uniformity of the forming breadth 2. The wind field calibration system of the additive manufacturing equipment characterizes the characteristics of the wind field by measuring and analyzing the wind speed and the deviation of different positions of the forming plane 2, and the wind speed in the whole forming breadth 2 range can be measured in single or multiple batches, so that the obtained deviation value can more accurately reflect or characterize the characteristics of the wind field.

The additive manufacturing equipment in the embodiment of the invention is equipment for selective laser melting forming or selective laser sintering forming and the like.

The inert gas in the embodiment of the invention is one or more of helium, argon or neon.

In the embodiment of the invention, the size of the forming breadth 2, namely the area to be measured, is set to be 250mm multiplied by 250mm, the bit spacing of the wind speed acquisition point positions 4 in the same batch is 50mm, and the line spacing of the wind speed acquisition point positions in the batches is 50 mm.

In the embodiment of the invention, the wind speed is collected in batches for multiple times, the wind speed can be specifically divided into 5 batches for respective collection, and the same batch of wind speed collection point positions 4 are wind speed collection point positions which are perpendicular to the direction of the wind direction and are positioned on the same straight line.

In the embodiment of the invention, the single-batch wind speed acquisition time is not less than 4-6h, specifically, the single-batch wind speed acquisition time can be set to be 10h, and 50h wind speed acquisition is carried out in total to finish the wind speed measurement on the whole forming breadth 2.

In the embodiment of the invention, the maximum outline dimension of the wind speed collector 3 is not more than 5mm multiplied by 5mm, specifically, a cylinder shape can be adopted, and the maximum outline dimension is phi 3mm multiplied by 5 mm.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.