Efficient multi-wire feeding device for laser additive manufacturing

Abstract

The invention provides a laser additive multi-wire-feeding catheter fixator device, which belongs to the field of laser additive manufacturing and comprises a laser deposition head, a fixing plate, a multifunctional wire feeder, a wire feeding fixing device and a straight square coaxial fixing frame. The laser deposition head is connected with the mechanical arm through a fixing plate, the wire feeding fixing device is mainly composed of square rod clamping plates, a square adjusting rod, a concave connecting piece and a wire feeding gun frame plate, the straight square coaxial fixing frame is composed of two L-shaped supports and fixed to the laser deposition head, and the centers of the periphery of the straight square coaxial fixing frame are connected with the square rod clamping plates respectively. The square adjusting rod is inserted into the square rod clamping plate and connected with the concave connecting piece, and the concave connecting piece is connected with the wire feeding gun frame plate. When a metal part is subjected to laser deposition forming, distribution of multiple wires or four wires can be met at the same time in the mode that the four wire feeding units are sequentially matched for wire feeding, multi-wire matching in the aspects of multi-direction, multi-wire combination and multi-conversion angle is carried out in the additive manufacturing and printing process, and the multi-wire distribution requirement is met. The problems that in the single paraxial wire feeding process, the efficiency is low, and multiple large-corner complex paths are difficult to deal with are effectively solved, and the printing efficiency in the additive manufacturing process can be greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of laser additive manufacturing, and more particularly to a high-efficiency multi-wire feeding device for laser additive manufacturing. Background Art

[0002] Laser additive manufacturing is an advanced technology that uses laser energy to perform 3D printing of molten powder materials under the assistance of a computer. It can be divided into two categories: laser powder selection forming and laser synchronous material feeding forming. According to the forming mechanism, it can be further divided into three technologies: selective laser melting, laser powder feeding deposition, and laser wire feeding deposition. The powder feeding additive manufacturing technology based on alloy powder has high forming accuracy and is suitable for processing small components with complex shapes, but the material utilization rate is low, and the powder has certain environmental pollution. At the same time, there are many problems such as high requirements for the operating environment. In comparison, compared with the powder feeding laser additive manufacturing technology, the wire feeding laser additive manufacturing technology has significant advantages such as high deposition efficiency, high material utilization rate, and small size restrictions on parts manufacturing. It can well meet the production needs of various manufacturing industries such as metal parts manufacturing, surface modification of parts, and repair of damaged parts. It has broad application prospects in the fields of large-scale parts manufacturing such as aerospace, marine ships, rail transportation, and automobile manufacturing.

[0003] Laser wire feeding additive manufacturing technology mainly uses single wire feeding for experiments, while the application of multi-wire feeding laser additive manufacturing technology has not been reported. Domestic and foreign studies have shown that the current research on laser single wire feeding additive manufacturing technology is mainly focused on a single wire feeding angle and height adjustment, which can only solve a single problem and is difficult to deal with large angle complex paths, multi-wire fusion and other problems. Multi-wire feeding laser additive manufacturing can effectively solve such problems and greatly improve printing efficiency.

[0004] Chinese patent CN 114535749 A discloses a multi-angle self-adjusting wire feeding device based on double-wire GTAW arc additive manufacturing, which allows the welding wires on both sides to enter the molten pool from the front end of the molten pool, thereby achieving good deposition layer morphology and performance. Different wire feeding devices are independent of each other, and welding wires of different materials can be used on both sides. By controlling the feed speed and wire feeding position of different wires, the composition control in the arc additive manufacturing process can be achieved, and the arc additive of gradient functional materials can be achieved. However, the composition control process can only achieve the fusion of two components, which still has defects for multi-material component additive manufacturing.

[0005] Chinese patent CN 115958270A discloses a reversible dual wire feeding device. The invention uses two self-driven wire feeding nozzle units to cooperate in sequential wire feeding, effectively solving the problem of large-angle complex paths that are difficult to cope with in side-axis wire feeding arc fuse additive manufacturing and wire-filling welding. The fast reversing fluid improves the efficiency of additive manufacturing. However, it is currently only used for dual wire feeding nozzles to cooperate in wire feeding, and cannot adapt to the problem of multiple corner printing in additive manufacturing. Moreover, the device can only carry dual wire feeding guns at most, and the printing efficiency cannot be further improved.

[0006] Therefore, it is very necessary to design an efficient multi-wire feeding device for laser additive manufacturing, which can realize multi-angle conversion and multi-material component fusion in the additive manufacturing process, greatly improving printing efficiency. Summary of the invention

[0007] In order to solve the problems of low efficiency of single-wire additive manufacturing, difficult to deal with multi-component fusion, multiple large-angle complex paths, etc., multiple wire feed guns are matched to achieve the purpose of multi-wire combination, effectively improving the printing efficiency of high-performance alloys. The present invention provides a high-efficiency multi-wire feed device for laser additive manufacturing.

[0008] In order to achieve the above object, the technical solution provided by the present invention is:

[0009] A laser additive manufacturing high-efficiency multi-wire feeding device comprises: the device comprises: a laser deposition head, a fixing plate, a multifunctional wire feeder, a wire feeding fixing device and a rectangular coaxial fixing frame; the laser deposition head is connected to a mechanical arm through the fixing plate, the wire feeding fixing device is mainly composed of a square rod clamping plate, a square adjustment rod, a concave connecting piece and a wire feeding gun frame plate, the rectangular coaxial fixing frame is composed of two L-shaped brackets connected to each other and fixed on the laser deposition head, the upper part of the L-shaped brackets are respectively connected to the fixing end of the square rod clamping plate, the square adjustment rod is inserted into the clamping end of the square rod clamping plate and connected to the concave connecting piece, the concave connecting piece is connected to the wire feeding gun frame plate by studs, and the wire feeding gun is installed in the through hole of the wire feeding gun frame plate; the rectangular coaxial fixing frame is used to fix the multi-wire feeding fixing device and realize synchronous movement with the laser deposition head.

[0010] Specifically, the square rod clamping plate consists of a fixed end and a clamping end. A threaded hole is designed at the center of the fixed end and is connected and fixed to the L-shaped bracket by screws. The clamping end is equipped with a square through hole that can be clamped up and down and adjusted, and the side length is 1-15mm.

[0011] Specifically, the length of the square adjustment rod is 50-200mm, the upper end is installed in the square through hole, and the lower end is designed with a threaded hole. The nominal diameter of the threaded hole is 4-12mm, and the thread depth is 4-16mm. It is fixed to the upper end of the concave connecting piece by screws and the rotation angle can be adjusted.

[0012] Specifically, the concave connecting piece is provided with a threaded through hole at the lower end, the threaded hole has a nominal diameter of 4-12 mm, and is connected to the wire feeding gun frame plate through a stud, and the angle can be adjusted.

[0013] Specifically, the front of the wire feeding gun holder is designed with a 1-10mm circular through hole, and the side is designed with a threaded through hole with a nominal diameter of 4-12mm. The circular through hole is used to load the wire feeding gun and is fixed by screws and the threaded through hole.

[0014] Specifically, three threaded through holes with a nominal diameter of 4-12mm are designed above the short side of the L-shaped bracket and are fixed to the fixed end of the square clamping plate through a third fastener; the side is designed with two threaded through holes with a nominal diameter of 4-12mm and one internal threaded hole with a nominal diameter of 4-12mm, and the thread depth is 4-16mm.

[0015] Specifically, three threaded through holes with a nominal diameter of 4-12 mm are designed above the long side of the L-shaped bracket and are fixed to the fixed end of the square clamping plate through a third fastener; three threaded through holes with a nominal diameter of 4-12 mm are designed on the side, two of which are fixed to the laser deposition head through a second fastener, and one is fixed to the short side of the L-shaped bracket through the second fastener to form a coaxial rectangular fixed frame, which can move synchronously with the laser deposition head.

[0016] The beneficial effect of the high-efficiency multi-wire feeding device for laser additive manufacturing provided by the present application is that during the laser deposition forming of metal parts, as the laser deposition head moves, the multi-wire feeding fixture can be synchronously guided to follow, so as to achieve coordinated cooperation of multi-directional wire feeding and meet the printing methods such as multi-directional transformation and multi-wire fusion. The use of the multi-wire feeding gun fixture can effectively deal with the problems of multiple large-angle complex paths and the coordination and fusion of multiple wires. The application of multiple wires can also solve the problem of low printing efficiency in the single wire feeding process, thereby further improving the printing efficiency of the additive manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a high-efficiency multi-wire feeding device for laser additive manufacturing provided in an embodiment of the present application;

[0018] Figure 2 An enlarged structural schematic diagram of a high-efficiency multi-wire feeding device for laser additive manufacturing provided in an embodiment of the present application;

[0019] Figure 3 An exploded schematic diagram of a unit structure of a high-efficiency multi-wire feeding device for laser additive manufacturing provided in an embodiment of the present application;

[0020] Among them, the reference numerals in the figure are:

[0021] 1. Workbench; 2. Multifunctional wire feeder; 3. Wire feed tube; 4. Nozzle; 5. Laser deposition head; 6. Fixing plate; 7. Robotic arm; 8. L-shaped bracket; 9. Square rod clamping plate; 10. Square adjustment rod; 11. Concave connector; 12. Wire feed gun; 13. Wire feed gun support plate; 14. Deposition layer; 15. Base plate; 16. First fastener; 17. Second fastener; 18. Third fastener; 19. Stud; 20. Fourth fastener; 21. Nut; 22. Fifth fastener. DETAILED DESCRIPTION

[0022] The technical scheme of the present invention will be described in detail below in conjunction with embodiments. It should be understood that the following embodiments are provided only for the purpose of illustration and are not intended to limit the scope of the present invention. Those skilled in the art may make various modifications and substitutions to the present invention without departing from the purpose and spirit of the present invention.

[0023] like Figure 1-Figure 3 As shown, a laser additive manufacturing high-efficiency multi-wire feeding device provided in an embodiment of the present application is now described. The device includes a laser deposition head 5, a fixing plate 6, a multifunctional wire feeder 2, a square rod clamping plate 9, a square adjustment rod 10, a concave connecting piece 11, a wire feeding gun frame plate 13, and a rectangular coaxial fixing frame.

[0024] The laser deposition head 5 is fixed on a fixing plate 6 , and the fixing plate 6 is connected and fixed to the end of the robot arm 7 through threads, thereby ensuring that the laser deposition head 5 can move along the moving trajectory of the robot arm 7 .

[0025] The square rod clamping plate 9 is composed of a fixed end and a clamping end. A threaded hole is designed at the center of the fixed end of the square rod clamping plate. The nominal diameter of the threaded hole is 4-12mm and the thread depth is 4-16mm. A threaded hole of the same size as the threaded hole is also designed above the L-shaped bracket 8. The fixed end of the square rod clamping plate 9 is fixed to the rectangular coaxial fixture through a third fastener 18. The clamping end of the square rod clamping plate 9 is designed with a square through hole structure. The side length of the square through hole is 1-15mm. The square adjustment rod 10 is installed in the square through hole and fixed in position by a first fastener 16. The length of the square adjustment rod (10) is 50-200mm and the side length is 5-15mm. The square adjustment rod (1 0) An internal threaded hole with a diameter of 4-12mm and a depth of 4-16mm is designed at the center of the lower part. A threaded hole of the same size as that below the square adjusting rod is provided in the center of the groove of the concave connecting piece 11, which is connected by the fifth fastener 22, and the direction of the concave connecting piece can be adjusted by adjusting the fifth fastener 22. A threaded through hole with a diameter of 4-12mm and a depth of 4-16mm is provided below the groove, which is connected to the wire feeding gun holder plate through a stud 19 and can be adjusted in angle. A 1-10mm circular through hole is designed on the front of the wire feeding gun holder plate 13, and a nominal diameter 4-12mm threaded through hole is designed on the side. The circular through hole is used to load the wire feeding gun 12 and is fixed by the fourth fastener 20.

[0026] The multifunctional wire feeder 2 is connected to the wire feeding gun 12 via the wire feeding tube 3. When the multifunctional wire feeder 2 is powered on and the wire feeding speed and start-up delay are set, the wire is transported to the wire feeding tube 3 through the multifunctional wire feeder and finally transported to the wire feeding gun 12.

[0027] The wire feeding fixture is installed on a rectangular coaxial fixing frame, the square adjusting rod 10 is adjusted and fixed in the clamping end of the square rod clamping plate 9, and then the direction of the concave connecting member 11 is adjusted through the fifth fastener 22. The concave connecting member 11 is connected to the wire feeding gun frame plate 13 through the stud 19, and the placement angle of the wire feeding gun frame plate 13 can be adjusted by 0-60°.

[0028] The short side of the L-shaped bracket 8 is designed with an internal threaded hole, the nominal diameter of the threaded hole is 4-12mm, and the thread depth is 4-16mm. The long side of the L-shaped bracket 8 is designed with a threaded hole of the same size as the internal threaded hole of the short side, and the rectangular coaxial fixing frame is connected by a second fastener 17. The long and short side brackets of the L-shaped bracket 8 are designed with two threaded holes, the nominal diameter of the threaded hole is 4-12mm, and the thread depth is 4-16mm, which is the same size as the existing threaded hole on the laser deposition head 5. It is fixed to the laser deposition head 5 by screws to ensure that the movement of the rectangular coaxial fixing frame is consistent with the laser deposition head 5.

[0029] During operation, the laser deposition head 5 deposits a metal deposition layer 14 on the substrate 15 on the workbench 1. At this time, with the movement of the robotic arm 7, the rectangular coaxial fixing frame and the laser deposition head 5 maintain synchronous movement, and multiple wire feeding guns 12 on the wire feeding gun rack are placed at the laser focus and perform wire feeding work, ensuring that the laser scanning speed and the wire feeding speed are synchronized, thereby improving the work efficiency of part forming.

Claims

1. A high-efficiency multi-wire feeding device for laser additive manufacturing, characterized in that: include: It is composed of a laser deposition head (5), a fixing plate (6), a multifunctional wire feeder (2), a wire feeding fixing device and a rectangular coaxial fixing frame; The laser deposition head (5) is fixed to the mechanical arm (7) through a fixing plate (6), a metal laser nozzle (4) is provided below the laser deposition head (5), and the multifunctional wire feeder (2) is connected to the wire feeding gun (12); the wire feeding fixing device is composed of a square rod clamping plate (9), a square adjustment rod (10), a concave connecting piece (11) and a wire feeding gun frame plate (13); the fixed end of the square rod clamping plate (9) is fixed to a straight coaxial fixing frame, the square adjustment rod (10) is fixed in a square hole of the square rod clamping plate (9), the end of the square adjustment rod (10) is connected to the top of the concave connecting piece (11), the concave connecting piece (11) is connected to the wire feeding gun frame plate (13), and the coaxial straight square fixing frame is composed of two identical L-shaped brackets (8); the wire feeding gun (12) is fixed in a circular through hole of the wire feeding gun frame plate (13).

2. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: The square rod clamping plate (9) is composed of a fixed end and a clamping end in a gradient manner. The fixed end is fixed to the rectangular coaxial fixing frame through a third fastener (18), and the clamping end is fixed to the square adjustment rod (10).

3. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: The center of the fixed end face of the square rod clamping plate (9) is designed with a threaded hole, the nominal diameter of the threaded hole is 4-12 mm, the thread depth is 4-16 mm, and a fastening gap with a width of 0.5-3 mm and a length of 20-30 mm is reserved in the middle.

4. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: The clamping end of the square rod clamping plate (9) is designed with a square through hole, and the side length of the square through hole is 1-15 mm.

5. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: The rectangular coaxial fixing frame is composed of two L-shaped brackets (8), and the L-shaped bracket (8) is divided into a long side and a short side.

6. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: The short side of the L-shaped bracket (8) is designed with two threaded through holes with a nominal diameter of 4-12 mm and a depth of 4-16 mm, which are fixed to the laser deposition head (5) and one internal threaded hole with a nominal diameter of 4-12 mm, which is fixed to the long side of the L-shaped bracket (8); three threaded through holes with a nominal diameter of 4-12 mm are designed on the top, which are fixed to the fixed end of the square rod clamping plate (9) through a third fastener (18); three threaded through holes with a nominal diameter of 4-12 mm are designed on the long side of the L-shaped bracket, which are fixed to the laser deposition head and the short side of the L-shaped bracket through a second fastener (17); three threaded through holes with a nominal diameter of 4-12 mm and a thread depth of 4-16 mm are designed on the top, which are fixed to the fixed end of the square rod clamping plate (9) through a third fastener (18).

7. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: The upper end of the square adjustment rod (10) is fixed to the clamping end of the square rod clamping plate (9), and the lower end is provided with an internal threaded hole with a nominal diameter of 4-12 mm and a thread depth of 4-16 mm. The rod is fixed to the concave connecting piece (11) via a fifth fastener (22).

8. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: A threaded through hole with a nominal diameter of 4-12 mm is opened below the concave connecting piece (11), and is fixed to the wire feeding gun frame plate (13) via a stud connection.

9. The high-efficiency multi-wire feeding device for laser additive manufacturing according to claim 1, characterized in that: The side of the wire feeding gun frame plate (13) is provided with a threaded hole with a nominal diameter of 4-12 mm, the top is provided with a circular through hole with a diameter of 1-10 mm, and a fastening gap with a width of 0.5-3 mm and a length of 20-30 mm is reserved in the middle.

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