High-efficiency electric arc additive manufacturing production line

Abstract

The invention provides a high-efficiency electric arc additive manufacturing production line. The high-efficiency electric arc additive manufacturing production line comprises an intelligent turnover unit, a high-efficiency additive deposition unit, a high-precision additive deposition unit, a rough machining subtractive machining unit, a finish machining subtractive machining unit, a heat treatment unit, a nondestructive detection unit, a size detection unit and a master control system unit. According to the method, the manufacturing cycle of additive products produced in a large-batch mode can be greatly shortened, the delivery qualification rate is increased, the internal quality is improved, the method is superior to a traditional forging / casting manufacturing scheme, and high-quality whole-process one-stop delivery of the products can be achieved; the production line can automatically detect the product size and the internal quality, automatic repair of defective products is achieved, and the product percent of pass is increased; according to the robot-based production line processing unit, the whole-process monitoring of the operation state can be realized, the manufacturing quality of products is ensured, meanwhile, fault monitoring and elimination are facilitated, and the overall production efficiency of equipment is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric arc additive manufacturing, and particularly relates to a high-efficiency electric arc additive manufacturing production line, which can significantly shorten the manufacturing cycle of large-scale batch-produced additive products, improve the delivery qualification rate and internal quality, is superior to traditional forging / casting manufacturing solutions, and can achieve full-process one-stop delivery of high-quality products; the production line can automatically detect product size and internal quality, and automatically repair defective products to improve product qualification rate; the robot-based production line processing unit can realize full-process monitoring of the operating status, ensure the manufacturing quality of the product, and facilitate fault monitoring and troubleshooting, thereby improving the overall production efficiency of the equipment. Background Art

[0002] Arc-fused wire additive manufacturing technology is a digital manufacturing technology for manufacturing large metal parts with integrated functional structures. It is a new additive manufacturing technology that uses arc as a heat source to directly deposit metal wires through wire feeding. This technology has the characteristics of high deposition efficiency and low cost, and can realize the rapid manufacturing of large and complex structural parts such as high-performance high-temperature alloys, titanium alloys, aluminum alloys and high-strength steel. Components formed by arc additive manufacturing technology have the advantages of good mechanical properties, low production cost and high forming efficiency, and have received widespread attention.

[0003] The use of traditional forging processes in manufacturing aerospace module products has problems such as low material utilization and high production costs, while the use of traditional casting processes has problems such as many product defects and low first-time pass rate. The use of arc additive manufacturing can improve material utilization and first-time pass rate of products, and does not require molds.

[0004] However, when faced with large-scale batch production of cabin products, the arc additive manufacturing process has a long production cycle compared to the traditional forging / casting process. Since the additive manufacturing of single-piece cabin products requires the separate forming of the main barrel structure, internal and external rib structures, flange structure, etc., the forming of a single printing device has the problems of serial equipment process, repeated positioning to implement the printing of each local structure, and long printing time; and the local position needs to be machined separately during the printing process, and heat treatment, non-destructive testing, dimensional inspection and defect repair are required after printing. The above multiple processes result in a large number of additive manufacturing processes for single-piece cabin products, which cannot meet the needs of batch production. There is an urgent need for a high-efficiency full-process production line solution based on arc additive forming to meet the needs of rapid and high-quality production of cabin structure products in batch production. Summary of the invention

[0005] In order to overcome the deficiencies in the prior art, the inventors have conducted intensive research and provided a high-efficiency arc additive manufacturing production line to solve the problems of serial equipment processes, repeated positioning, and long printing time in additive printing manufacturing, while meeting the needs of fast and high-quality production of batch products.

[0006] The technical solution provided by the present invention is as follows:

[0007] A high-efficiency arc additive manufacturing production line, comprising an intelligent turnover unit, a high-efficiency additive deposition unit, a high-precision additive deposition unit, a roughing subtractive processing unit, a finishing subtractive processing unit, a heat treatment unit, a non-destructive testing unit, a dimension testing unit and a master control system unit;

[0008] The intelligent turnover unit is used to carry out the turnover of additive products between various processes; the high-efficiency additive deposition unit is used to perform additive forming of the main structure of the product; the high-precision additive deposition unit is used to perform additive forming of the local structure on the main structure of the product; the rough machining subtractive processing unit is used to perform rough machining of the inner and outer surfaces of the blank product; the fine machining subtractive processing unit is used to perform fine machining of the inner and outer surfaces of the blank product; the heat treatment unit is used to relieve stress and regulate the organizational properties of the product; the non-destructive testing unit is used to detect the internal quality of the product after heat treatment; the size detection unit is used to detect the outer surface size of the product after heat treatment; the master control system unit is used to carry out turnover allocation, capacity matching, production progress regulation and production quality monitoring between various processes.

[0009] Furthermore, the intelligent turnover unit includes at least one transfer vehicle, a substrate clamping tool and a turnover channel; the transfer vehicle carries the substrate clamping tool to circulate the substrate clamped on the substrate clamping tool and the additive products on the substrate; the substrate clamping tool is used to fix the substrate and transport it between various processes, and positioning holes are processed or positioning parts are installed on it, and it is positioned with the positioning holes or positioning parts on the processing platforms of other processing units; the turnover channel is a dedicated operating channel for the transfer vehicle.

[0010] Furthermore, the high-efficiency additive deposition unit includes multiple groups of additive robots, welding machines and single-axis rotating platforms; the single-axis rotating platform is used to carry the substrate and the products formed on the substrate; the additive robots are evenly distributed around the single-axis rotating platform, and each group of additive robots clamps the welding gun of the welding machine to synchronously perform additive forming of the blank.

[0011] Furthermore, the high-precision additive deposition unit includes a single additive robot, a welder and a dual-axis positioner; the dual-axis positioner has a central rotating shaft and a horizontal rotating shaft, on which a table is fixed, which can drive the substrate on the table to rotate infinitely horizontally and flip 90° on both sides; the single additive robot clamps the welding gun of the welder, and the dual-axis servo positioner performs multi-axis coordinated motion to complete the additive forming of the internal and external characteristic structures of the blank product.

[0012] Furthermore, the diameter of the welding wire used in the additive forming of the high-efficiency additive deposition unit is greater than the diameter of the welding wire used in the additive forming of the high-precision additive deposition unit; the wire feeding speed of the welding wire in the additive forming of the high-efficiency additive deposition unit is greater than the wire feeding speed of the welding wire in the additive forming of the high-precision additive deposition unit.

[0013] Furthermore, when the high-efficiency additive deposition unit performs additive forming, the diameter of the welding wire is 1.2 to 1.6 mm, the wire feeding speed is 9 to 15 m / min, the welding gun supports the simultaneous feeding of double wires for deposition forming, and the additive deposition efficiency of a single group of robots is not less than 500 cm 3 / h.

[0014] Furthermore, when the high-precision additive deposition unit performs additive forming, the diameter of the welding wire is 0.8-1.0 mm, the wire feeding speed is 4-9 m / min, the welding gun only supports feeding a single wire for deposition forming, and the single-side contour forming accuracy of the additive deposition is better than 2 mm.

[0015] Furthermore, the rough machining subtractive processing unit can be used for grinding specific areas of the inner and outer walls before, after, or before and after the forming of the high-precision additive deposition unit; the rough machining subtractive processing unit includes a subtractive robot, an electric spindle and a rotary platform; the subtractive robot clamps the electric spindle so that its fixed milling cutter performs milling processing on the corresponding area of ​​the additive blank on the rotary platform, and the rotation speed of the electric spindle during processing is 6000-10000rpm / min.

[0016] Furthermore, the heat treatment unit includes a solution furnace and an aging furnace, which are used for solution and aging heat treatment of the blank product after the additive forming is completed.

[0017] Furthermore, the nondestructive testing unit includes an X-ray machine, a nondestructive testing robot and a testing rotary platform. The nondestructive testing robot clamps the X-ray testing head to perform internal quality inspection on the rough-processed or fine-processed products on the testing rotary platform, identifies areas with excessive pores and unfused defects, and feeds back the collected data to the master control system unit.

[0018] Furthermore, the size detection unit includes a three-dimensional scanning instrument, a three-dimensional scanning robot and a detection rotating platform. The three-dimensional scanning robot clamps the three-dimensional scanning detection head of the three-dimensional scanning instrument to perform three-dimensional scanning detection of the internal and external surfaces of the additive blank after heat treatment or the fine-processing product on the detection rotating platform, identify the missing meat area or deformation area of ​​the product, and feed back the collected data to the main control system.

[0019] Furthermore, the master control system unit is used to implement the following functions:

[0020] (1) By controlling the turnover of the transfer vehicle, the additive products are circulated in each manufacturing unit;

[0021] (2) Count the time required to manufacture the target product in each manufacturing unit, select the longest time required for a single longest manufacturing unit, and use it as the shortest production cycle for batch production of the product; the master control system unit adjusts the remaining idle manufacturing units to produce other types of products based on the shortest production cycle;

[0022] (3) Using the data from X-ray and 3D scanning to determine whether the products meet the design requirements, the products are graded according to their quality and applied to different grades of working conditions;

[0023] (4) According to the defects and areas with excessive contours reported by X-ray and 3D scanning inspection, the product is transferred to the finishing subtractive processing unit to eliminate the defects and areas with excessive contours, and then transferred to the high-precision additive deposition unit for secondary additive in the missing areas. After secondary heat treatment, it is transferred to the finishing subtractive processing unit for finishing. Finally, after passing the secondary inspection of the non-destructive testing unit X-ray and the dimensional inspection unit, it is qualified as a product;

[0024] (5) Real-time online monitoring of the motion coordinates of each robot and the operating status of each processing head to determine whether it is working in each unit; timely processing and maintenance based on abnormal alarm conditions in each unit.

[0025] A high-efficiency arc additive manufacturing production line provided by the present invention has the following beneficial effects:

[0026] (1) The present invention provides a high-efficiency arc additive manufacturing production line, whose manufacturing cycle can be better than that of traditional forging / casting. Additive forming and subtractive processing units with different efficiencies are set according to the product structure characteristics, and are equipped with heat treatment, non-destructive testing and dimensional detection units. This solves the problems of serial equipment process, repeated positioning, long printing time, etc. in the manufacturing of a single device, and realizes one-stop delivery of the entire product process.

[0027] (2) The present invention provides a high-efficiency arc additive manufacturing production line, which can realize automatic detection of product size and internal quality through a non-destructive detection unit and a dimension detection unit, thereby ensuring that the manufactured products meet the quality requirements; and under the control of the master control system unit, it can realize automatic repair for products with internal quality and dimension problems, thereby improving the product delivery qualification rate.

[0028] (3) The high-efficiency arc additive manufacturing production line provided by the present invention is based on a robot control system, and the technical solution for realizing coordinated control of various types of robots and external axis linkage control is highly mature, so the overall system is easy to implement; the robot-based processing unit can realize full-process monitoring of the operating status, ensuring the forming quality of the product, while facilitating fault monitoring and troubleshooting, thereby improving the overall production efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a high-efficiency arc additive manufacturing production line of the present invention;

[0030] Figure 2 This is a substrate clamping tooling structure of a preferred form of the present invention. DETAILED DESCRIPTION

[0031] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0032] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0033] like Figure 1 As shown, the present invention provides a high-efficiency arc additive manufacturing production line, including an intelligent turnover unit, a high-efficiency additive deposition unit, a high-precision additive deposition unit, a roughing subtractive processing unit, a finishing subtractive processing unit, a heat treatment unit, a non-destructive testing unit, a dimension detection unit and a general control system unit.

[0034] The intelligent turnover unit is used to carry out the turnover of additive products between various processes; the high-efficiency additive deposition unit is used to perform high-efficiency additive forming of the main structure of the product; the high-precision additive deposition unit is used to perform high-precision additive forming of local structures on the main structure of the product, such as the additive forming of internal and external rib structures and flange structures on the main barrel structure; the rough machining subtractive processing unit is used to perform rough machining of the internal and external surfaces of the blank product; the fine machining subtractive processing unit is used to perform fine machining of the internal and external surfaces of the blank product; the heat treatment unit is used to relieve stress and regulate the organizational properties of the product; the non-destructive testing unit is used to detect the internal quality of the product; the size detection unit is used to detect the size of the product's external surface; the master control system unit is used to carry out turnover allocation, capacity matching, production progress control and production quality monitoring between various processes.

[0035] In the present invention, the intelligent turnover unit is composed of at least one AGV trolley, a substrate clamping tool, a turnover channel, etc. The AGV trolley is responsible for carrying the substrate clamping tool, and turnovers the substrate clamped on the substrate clamping tool and the additive products on the substrate; the substrate clamping tool is used to fix the substrate and transport it between various processes with the substrate, and positioning holes are processed or positioning parts are installed on it, and it is quickly positioned with the positioning holes or positioning parts on the processing platform of other processing units, such as by positioning methods such as latches. The substrate clamping tool is fixed on the processing platform of other processing units, and the position of the substrate and product carried on it is fixed on the processing platform, avoiding the problem of repeated positioning during multiple turnovers; the turnover channel is mainly a dedicated operation channel for the AGV trolley to avoid interference or road occupation by foreign objects.

[0036] like Figure 2 As shown, the substrate clamping tool is a flexible clamping tool, including a central clamping area 1, a peripheral clamping area 2 and an expandable telescopic rod 3. The peripheral clamping area is distributed on the periphery of the central clamping area, and the central clamping area and the peripheral clamping area are connected by the expandable telescopic rod. The peripheral clamping area is an integral structure or a split structure. When the peripheral clamping area is an integral structure, the entire peripheral clamping area moves as a whole; when the peripheral clamping area is a split structure, the peripheral clamping area moves in blocks, and the movement is more flexible. Positioning holes are processed or positioning parts are installed on the central clamping area to ensure that the position of the positioning holes or positioning parts remains unchanged.

[0037] In the present invention, the high-efficiency additive deposition unit is composed of 2 to 4 groups of additive robots, a welding machine and a single-axis rotating platform. The single-axis rotating platform is used to carry the substrate and the products formed on the substrate; the additive robots are evenly distributed around the single-axis rotating platform, and each group of additive robots clamps the welding gun of the welding machine to synchronously perform high-efficiency additive forming of the blank. In order to further improve the deposition efficiency, the welding wire is selected with a diameter of 1.2 to 1.6 mm, and the welding gun supports the simultaneous feeding of double wires for deposition forming. The wire feeding speed of the unified welding machine is 9 to 15 m / min, and the additive deposition efficiency of a single group of robots is not less than 500 cm 3 / h, preferably not less than 1000cm 3 / h.

[0038] For example, the high-efficiency additive deposition unit consists of two groups of additive robots, a welding machine and a single-axis rotating platform. The additive robots are evenly distributed around the single-axis rotating platform. Each group of additive robots holds the welding gun and performs high-efficiency additive forming of blanks simultaneously. The welding wire is selected with a diameter of 1.6mm. The welding gun supports the simultaneous feeding of double wires for deposition forming. The wire feeding speed of the unified welding machine is 12m / min. The additive deposition efficiency of a single group of robots can reach no less than 1000cm 3 / h.

[0039] In the present invention, the high-precision additive deposition unit is composed of a single additive robot, a welding machine and a dual-axis positioner. The dual-axis positioner has a central rotating shaft and a horizontal rotating shaft, on which a table is fixed, which can drive the substrate on the table to rotate infinitely horizontally and flip 90° on both sides, thereby meeting the needs of various product positions in the arc additive process. A single additive robot clamps the welding gun of the welding machine, and the dual-axis servo positioner performs multi-axis coordinated motion to complete the high-precision additive forming of the internal and external characteristic structures of the blank product. In order to further improve the surface forming accuracy, the welding wire is selected with a diameter of 0.8 to 1.0 mm, the welding gun only supports the feeding of a single wire for deposition forming, the wire feeding speed of the unified welding machine is 4 to 9 m / min, and the single-sided contour forming accuracy of the additive deposition is better than 2 mm. For example, the welding wire is selected with a diameter of 0.8 mm, the welding gun only supports the feeding of a single wire for deposition forming, the wire feeding speed range of the unified welding machine is 5 m / min, and the single-sided contour forming accuracy of the additive deposition is better than 1 mm.

[0040] In the present invention, the roughing subtractive processing unit is composed of a large-tonnage subtractive robot, an electric spindle and a rotary platform. According to the position where the excess on the blank surface needs to be removed, the subtractive robot clamps the electric spindle so that its fixed milling cutter performs high-efficiency milling processing on the corresponding area of ​​the additive blank on the rotary platform, and the speed of the electric spindle during processing is 6000-10000rpm / min. The roughing subtractive processing unit can be used for grinding specific areas of the inner and outer walls before, after, or before and after the high-precision additive deposition unit is formed.

[0041] The finishing subtractive machining unit consists of a three-axis or five-axis gantry machining machine, which is used to finish the product after rough machining to ensure the final size of the product.

[0042] In the present invention, the heat treatment unit includes a solution furnace and an aging furnace, which are used for the solution and aging heat treatment of the blank product after the additive forming is completed.

[0043] In the present invention, the nondestructive testing unit is composed of an X-ray machine, a nondestructive testing robot, a testing rotary platform, etc. The nondestructive testing robot clamps the X-ray testing head to perform internal quality inspection on the rough-processed or fine-processed products on the testing rotary platform, identifies areas with excessive pores and unfused defects, and feeds back the collected data to the general control system unit.

[0044] In the present invention, the size detection unit is composed of a three-dimensional scanning instrument, a three-dimensional scanning robot, a detection rotary platform, etc. The three-dimensional scanning robot clamps the three-dimensional scanning detection head of the three-dimensional scanning instrument to perform three-dimensional scanning detection of the inner and outer surfaces of the additive blank after heat treatment or the fine-processing product on the detection rotary platform, identify the missing meat area or deformation area of ​​the product, and feed back the collected data to the master control system.

[0045] In the present invention, the master control system unit is composed of a PLC panel, a data signal collector, etc., and the following functions are realized through the master control unit:

[0046] (1) Production process control: By controlling the turnover of the AGV, the additive products can be circulated in the manufacturing units of “additive manufacturing – subtractive manufacturing – heat treatment – ​​testing”.

[0047] (2) Pulse beat T control: according to the structural characteristics of batch-produced products, the time tn required to manufacture the product in each manufacturing unit is counted, and the longest time T required for the single longest manufacturing unit is selected, that is, the shortest production beat T for batch production of the product. While ensuring the batch production of the product, the master control system unit can adjust the remaining idle manufacturing units to produce other types of products, further improving equipment utilization.

[0048] (3) Production quality control: through the feedback data of X-ray and 3D scanning detection, we can judge whether the products meet the design requirements, and classify the products according to their quality, so as to apply them to different levels of working conditions. The higher the level of working conditions, the higher the requirements for product quality. It is not allowed to use products after defect repair under high-level working conditions.

[0049] (4) Repair of defective products: Based on the defects and areas with excessive contours detected by X-ray and 3D scanning, the products are transferred to the finishing subtractive processing unit to eliminate the defects and areas with excessive contours, and then transferred to the high-precision additive deposition unit for secondary additive processing of the missing areas. After secondary heat treatment, the products are transferred to the finishing subtractive processing unit for finishing. Finally, they are qualified products after passing the secondary inspection by the non-destructive testing unit, X-ray, and the dimensional inspection unit. This method can greatly improve the product qualification rate.

[0050] (5) Status monitoring and alarm of each unit, including real-time online monitoring of the motion coordinates of each robot and the operating status of each processing head (welding gun and electric spindle), judging whether it is working in each unit, and ensuring real-time manufacturing quality control of the product. Timely processing and maintenance are carried out according to abnormal alarm conditions of each unit to ensure the normal and efficient operation of the production line.

[0051] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0052] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A high-efficiency arc additive manufacturing production line, characterized in that: It includes intelligent turnover unit, high-efficiency additive deposition unit, high-precision additive deposition unit, roughing subtractive processing unit, finishing subtractive processing unit, heat treatment unit, non-destructive testing unit, dimension testing unit and master control system unit; The intelligent turnover unit is used to carry the turnover of additive products between various processes; the high-efficiency additive deposition unit is used to perform additive forming of the main structure of the product; The high-precision additive deposition unit is used for additive forming of local structures on the main structure of the product; the rough machining subtractive processing unit is used for rough machining of the inner and outer surfaces of the blank product; the fine machining subtractive processing unit is used for fine machining of the inner and outer surfaces of the blank product; the heat treatment unit is used for stress relief and organizational performance regulation of the product; the non-destructive testing unit is used for testing the internal quality of the product after heat treatment; the size detection unit is used for testing the outer surface size of the product after heat treatment; the master control system unit is used for turnover allocation, capacity matching, production progress regulation and production quality monitoring between various processes.

2. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The intelligent turnover unit includes at least one transfer vehicle, a substrate clamping tool and a turnover channel; the transfer vehicle carries the substrate clamping tool to circulate the substrate clamped on the substrate clamping tool and the additive products on the substrate; the substrate clamping tool is used to fix the substrate and transport it between various processes, and positioning holes are processed or positioning parts are installed on it, and it is positioned with the positioning holes or positioning parts on the processing platforms of other processing units; the turnover channel is a dedicated operating channel for the transfer vehicle.

3. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The high-efficiency additive deposition unit includes multiple groups of additive robots, welding machines and single-axis rotating platforms; the single-axis rotating platform is used to carry the substrate and the products formed on the substrate; the additive robots are evenly distributed around the single-axis rotating platform, and each group of additive robots clamps the welding gun of the welding machine to synchronously perform additive forming of the blank.

4. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The high-precision additive deposition unit includes a single additive robot, a welder and a dual-axis positioner; the dual-axis positioner has a central rotating shaft and a horizontal rotating shaft, on which a table is fixed, which can drive the substrate on the table to rotate infinitely horizontally and flip 90° on both sides; the single additive robot clamps the welding gun of the welder, and the dual-axis servo positioner performs multi-axis coordinated motion to complete the additive forming of the internal and external characteristic structures of the blank product.

5. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The diameter of the welding wire used in the additive forming of the high-efficiency additive deposition unit is greater than the diameter of the welding wire used in the additive forming of the high-precision additive deposition unit; the wire feeding speed of the welding wire in the additive forming of the high-efficiency additive deposition unit is greater than the wire feeding speed of the welding wire in the additive forming of the high-precision additive deposition unit.

6. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: When the high-efficiency additive deposition unit performs additive forming, the diameter of the welding wire is 1.2-1.6 mm, the wire feeding speed is 9-15 m / min, the welding gun supports the simultaneous feeding of double wires for deposition forming, and the additive deposition efficiency of a single group of robots is not less than 500 cm 3 / h; and / or When the high-precision additive deposition unit performs additive forming, the diameter of the welding wire is 0.8-1.0 mm, the wire feeding speed is 4-9 m / min, the welding gun only supports feeding a single wire for deposition forming, and the single-side contour forming accuracy of the additive deposition is better than 2 mm.

7. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The rough machining subtractive processing unit can be used for grinding specific areas of the inner and outer walls before, after, or before and after the forming of the high-precision additive deposition unit; the rough machining subtractive processing unit includes a subtractive robot, an electric spindle and a rotary platform; the subtractive robot clamps the electric spindle so that its fixed milling cutter performs milling processing on the corresponding area of ​​the additive blank on the rotary platform, and the rotation speed of the electric spindle during processing is 6000-10000rpm / min.

8. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The heat treatment unit includes a solution furnace and an aging furnace for solution and aging heat treatment of the blank product after the additive forming is completed; and / or The nondestructive testing unit includes an X-ray machine, a nondestructive testing robot and a testing rotary platform. The nondestructive testing robot clamps an X-ray testing head to perform internal quality inspection on the rough-processed or fine-processed products on the testing rotary platform, identifies areas with excessive pores and unfused defects, and feeds back the collected data to the master control system unit.

9. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The size detection unit includes a three-dimensional scanning instrument, a three-dimensional scanning robot and a detection rotating platform. The three-dimensional scanning robot clamps the three-dimensional scanning detection head of the three-dimensional scanning instrument to perform three-dimensional scanning and detection of the inner and outer surfaces of the additive blank after heat treatment or the fine-processing product on the detection rotating platform, identify the missing meat area or deformation area of ​​the product, and feed back the collected data to the master control system.

10. The high-efficiency arc additive manufacturing production line according to claim 1, characterized in that: The master control system unit is used to implement the following functions: (1) By controlling the turnover of the transfer vehicle, the additive products are circulated in each manufacturing unit; (2) Count the time required to manufacture the target product in each manufacturing unit, select the longest time required for a single longest manufacturing unit, and use it as the shortest production cycle for batch production of the product; the master control system unit adjusts the remaining idle manufacturing units to produce other types of products based on the shortest production cycle; (3) Using the data from X-ray and 3D scanning to determine whether the products meet the design requirements, the products are graded according to their quality and applied to different grades of working conditions; (4) According to the defects and areas with excessive contours reported by X-ray and 3D scanning inspection, the product is transferred to the finishing subtractive processing unit to eliminate the defects and areas with excessive contours, and then transferred to the high-precision additive deposition unit for secondary additive in the missing areas. After secondary heat treatment, it is transferred to the finishing subtractive processing unit for finishing. Finally, after passing the secondary inspection of the non-destructive testing unit X-ray and the dimensional inspection unit, it is qualified as a product; (5) Real-time online monitoring of the motion coordinates of each robot and the operating status of each processing head to determine whether it is working in each unit; timely processing and maintenance based on abnormal alarm conditions in each unit.

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