Swing type electric arc additive manufacturing printing device

Abstract

The invention discloses a swing type electric arc additive manufacturing printing device which comprises a printing frame, a printing mechanism and a metal additive, and an electric arc pen is installed on one side of the printing mechanism in an embedded mode. When the thickness of the mold table changes, the expansion contact is correspondingly pushed, when the thickness of one side of the mold table is large, the expansion contact on the side is pushed out, the fixed supporting rod serves as a fulcrum, the contact rod on the transmission rod moves towards the interior of the printing mechanism, the contact on the contact rod slides along with the contact and is attached to the driving rotating wheel on the other side, and a current path is formed. The corresponding driving rotating wheels are driven to rotate, the metal additive is driven to move downwards, feeding adjustment of areas with different thicknesses is achieved, the driving gear shaft rotates by the corresponding length through the moving distance of the transmission rod, then the sliding distance of the closing plate in the heating head is controlled, and the discharging coverage amount corresponding to the thickness is adjusted. And the supply amount and the discharge amount of the metal additive are correspondingly adjusted according to the thickness change of the mold.

Description

Technical Field

[0001] The present invention relates to the field of arc additive manufacturing, and particularly to a swing-type arc additive manufacturing printing device. Background Technique

[0002] Arc additive manufacturing is a manufacturing technology for printing. It uses an arc as a heat source to melt metal additives and stack them layer by layer along a predetermined path, ultimately manufacturing a three-dimensional solid part. The swing-type arc additive manufacturing printing device is mainly used for manufacturing three-dimensional metal parts. By controlling the printing trajectory, it improves the limitations of fixed-arc printing. During the manufacturing process, the arc can operate according to a specific printing trajectory pattern, making the melted metal wire stack more evenly. This helps to improve the shape and size of the molten pool, enhance the interlayer bonding force, improve the surface quality of complex-shaped parts, ensure the consistency of material stacking in each part of the printed product, and at the same time prevent thermal stress concentration, reduce the risk of part deformation and cracking, so as to meet the printing requirements for high-quality complex-structured metal parts in various fields.

[0003] Since different printing paths will lead to differences in the stacking method and microstructure of materials, when the thickness of the printed profile is the same and the path is a single path, the metal grain orientation of the additive material is relatively consistent. However, when the thickness of the printed profile changes and the printing path is reciprocating rather than a single path, the stacking direction of the additive will change, thereby causing different metal grain orientations of the additive. As a result, when the finished product is stressed, the stress-bearing capacity in this area is different, which leads to uneven overall strength and reduces the overall stress-bearing strength of the finished product.

[0004] Therefore, a swing-type arc additive manufacturing printing device is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a swing-type arc additive manufacturing printing device to solve the problem that when the printing path is reciprocating rather than a single path as mentioned in the above background technique, the stacking direction of the additive will change, thereby causing different metal grain orientations of the additive. As a result, when the finished product is stressed, the stress-bearing capacity in this area is different, which leads to uneven overall strength.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A swing-type arc additive manufacturing printing device, comprising a printing frame, a printing mechanism, and a metal additive. One side of the printing mechanism is fitted with an arc pen, and a swing head is fitted and movably installed below the arc pen. An arc head is fixedly installed below the swing head, and the arc head is electrically connected to the arc pen. The printing mechanism includes a pressing plate, and the pressing plate is fitted and movably installed on both sides of the upper part inside the printing mechanism. On both sides above the pressing plate, an auxiliary rotating wheel and a driving rotating wheel installed on the printing mechanism are fixedly installed at equal intervals. On one side of the pressing plate, a contact rod is fixedly installed, and the swing head is in fitting and movable contact with the contact rod. On one side above the printing mechanism, an air delivery pipe is fitted and fixedly installed. On both sides of one end inside the air delivery pipe, a connecting rod is fitted and movably installed, and the connecting rods are both fitted and movably connected to the pressing plate. A skin cloth is installed between the connecting rod and the air delivery pipe, and both ends of the skin cloth are fixedly connected to the connecting rod and the air delivery pipe respectively. On both sides of the printing mechanism, a lever mechanism is fitted and movably installed. Below the printing mechanism, a printing head is fitted and fixedly installed. The printing head includes a heating head. Above the heating head, a rotating sleeve is movably installed, and tooth grooves are equidistantly arranged on the outer surface of the rotating sleeve. The tooth grooves are in meshing transmission connection with a gear installed on the driving shaft of a driving motor inside the printing mechanism, and the rotating sleeve is in meshing transmission connection with the gear on the driving shaft of the driving motor through the tooth grooves and is movably installed below the inside of the printing mechanism. On both sides below the heating head, a closing plate is fitted and movably installed, and on one side above the closing plate, a driving tooth shaft for sliding it is fitted and movably installed inside the heating head.

[0008] In the above solution, preferably: The lever mechanism includes a fixed support rod used as a fixed fulcrum, and on one side of the fixed support rod, a transmission rod is fitted and movably installed. Below the transmission rod, an expansion contact head located on one side of the printing head is fixedly provided.

[0009] In the above solution, preferably: On the inner sides above the transmission rods, contact rods are fitted and movably installed, and the contact rods are all fitted and movably installed inside the printing mechanism through movable slots provided on the printing mechanism. On the inner sides of the contact rods, contact heads are fixedly installed, and the contact heads are in fitting connection with the driving rotating wheel.

[0010] In the above solution, preferably: The metal additive is fitted and movably installed inside the printing mechanism, and the lower end of the metal additive is fitted and installed between the driving rotating wheel and the auxiliary rotating wheel. The lower end of the metal additive is in fitting contact with the pressing plate.

[0011] In the above solution, preferably: Support feet for support are fixedly installed below the printing frame, and a servo motor for providing power is fixedly installed on one side of the printing frame. One end of the servo motor is fixedly installed with a driving shaft for transmitting power. Auxiliary rods are vertically fixedly installed on both sides of the printing frame.

[0012] In the above solution, preferably: sliders are nested and installed above the auxiliary rods on both sides, and the sliders are connected to each other by a fixed rod provided. A servo motor is fixedly installed on one side of one of the sliders. Auxiliary rotating shafts are fitted and movably installed on the sliders on one side and the other side of the printing frame, and transmission belts are nested and installed between the auxiliary rotating shafts and the driving shaft.

[0013] In the above solution, preferably: an installation base for installing a printing mechanism is nested and installed on the fixed rod between the sliders, and the installation base is fixedly connected in a fitted manner to one side of the transmission belt. Fixed sliding rods are symmetrically installed in the middle of the printing frame, and a printing base is fitted and movably installed on the fixed sliding rods, and the printing base is fixedly connected in a fitted manner to one side of the transmission belt.

[0014] In the above solution, preferably: a threaded rod is provided inside one of the auxiliary rods, and the threaded rod is fitted and movably installed on the printing frame and is fitted and movably connected to the slider on one side. A servo motor fixedly installed on the printing frame is provided below the threaded rod, and the driving shaft on the servo motor is fixedly connected to the threaded rod.

[0015] The present invention provides a swing-type arc additive manufacturing printing device, having the following technical key points and

[0016] beneficial effects:

[0017] 1. By designing structures such as fixed support rods, expansion contacts, contact rods, and contacts, during the printing process, the expansion contacts are in contact with the mold table. When the thickness of the mold table changes, the expansion contacts will be pushed correspondingly. When the thickness of one side of the mold table is larger, the expansion contact on that side is pushed out. With the fixed support rod as the fulcrum, the contact rod on the transmission rod moves into the printing mechanism, and the contact on the contact rod slides and fits with the driving wheel on the other side to form an electric current path, driving the corresponding driving wheel to rotate, driving the metal additive to move downward, realizing the feeding adjustment for different thickness regions. Moreover, the rotation of the driving gear shaft corresponds to the length by the moving distance of the transmission rod, thereby controlling the sliding distance of the closing plate in the heating head to adjust the discharge coverage corresponding to this thickness, and then correspondingly adjusting the supply amount and discharge amount of the metal additive according to the change in the mold thickness.

[0018] 2. The present invention designs structures such as connecting rods, abutment plates and gas pipes. When the metal additive moves downward to open the abutment plate, the abutment plate drives the connecting rod to expand to both sides in the gas pipe. The gas pipe inputs the required amount of protective gas into the printing mechanism through the opening to prevent the metal additive from coming into contact with oxygen and undergoing an oxidation reaction when the arc melts. At the same time, the contact rod on the abutment plate will move as the abutment plate is opened. The contact rod will fit in contact with the swing head to limit the movable position of the swing head. When the pressure exerted by the metal additive on the abutment plate on one side changes, the position of the contact rod will change, and the swing range of the swing head will be adjusted accordingly, so that the swing range of the arc head matches the supply range of the metal additive, so that the arc can melt the supplied metal additive correspondingly, thereby improving the printing efficiency.

[0019] 3. The present invention designs structures such as a rotating sleeve, a driving gear and a print head. When the swing head melts the metal additive by arc, the molten metal falls into the rotating sleeve. When the rotating sleeve rotates under the action of the driving gear, a directional acceleration force is applied to the molten metal to generate forced convection. Under the action of gravity, the molten metal is discharged through the closed plate. During the discharge and covering solidification process, the grains in the solution preferentially grow along a specific direction related to the direction of the acceleration force. This crystal directional growth method improves the grain orientation consistency of the metal part after the metal solution is cooled and solidified, and enhances the stability of the internal structure of the metal part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partial structural schematic diagram of the printing frame in the present invention;

[0022] Figure 3 It is a schematic diagram of the split structure of the installation base and the printing mechanism in the present invention;

[0023] Figure 4 It is a schematic cross-sectional view of the internal structure of the printing mechanism in the present invention;

[0024] Figure 5 It is a schematic diagram of the connection structure between the metal additive and the abutment plate in the present invention;

[0025] Figure 6 It is a schematic diagram of the connection structure between the metal additive and the driving wheel in the present invention;

[0026] Figure 7 It is a schematic diagram of the connection structure between the abutment plate and the connecting rod in the present invention;

[0027] Figure 8 It is a schematic diagram of the connection structure between the touch rod and the swing head in the present invention;

[0028] Figure 9 It is a schematic diagram of the local structure of the print head in the present invention;

[0029] Figure 10 Schematic diagram of the split structure of the rotating sleeve and the heating head in the present invention;

[0030] Figure 11 Partial structural sectional view of the heating head in the present invention.

[0031] In the figure: 1, printing frame; 2, servo motor; 3, transmission belt; 4, support foot; 5, printing base; 6, threaded rod; 7, auxiliary rod; 8, slider; 9, drive shaft; 10, mounting base; 11, printing mechanism; 1101, pressing plate; 1102, auxiliary runner; 1103, drive runner; 1104, contact rod; 12, arc pen; 1201, swinging head; 1202, arc head; 13, gas pipeline; 1301, skin cloth; 1302, connecting rod; 14, lever mechanism; 1401, expanding contact; 1402, fixed support rod; 1403, contact rod; 1404, transmission rod; 1405, contact; 15, printing head; 1501, rotating sleeve; 15011, tooth groove; 1502, heating head; 1503, closing plate; 1504, drive gear shaft; 16, metal additive. Specific implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 11 , the present invention provides a technical solution for a swing arc additive manufacturing printing device:

[0034] A swing-type arc additive manufacturing printing device includes a printing frame 1, a printing mechanism 11, and a metal additive 16. On one side of the printing mechanism 11, an arc pen 12 is fitted and installed, and a swing head 1201 is fitted and movably installed below the arc pen 12. An arc head 1202 is fixedly installed below the swing head 1201, and the arc head 1202 is electrically connected to the arc pen 12. The printing mechanism 11 includes a pressing plate 1101, and the pressing plate 1101 is fitted and movably installed on both sides of the upper part inside the printing mechanism 11. On both sides above the pressing plate 1101, an auxiliary rotating wheel 1102 and a driving rotating wheel 1103 installed on the printing mechanism 11 are fixedly installed at equal intervals. On one side of the pressing plate 1101, a contact rod 1104 is fixedly installed, and the swing head 1201 is in fitting and movable contact with the contact rod 1104. On one side above the printing mechanism 11, an air delivery pipe 13 is fitted and fixedly installed. On both sides of one end inside the air delivery pipe 13, a connecting rod 1302 is fitted and movably installed, and the connecting rods 1302 are both in fitting and movable connection with the pressing plate 1101. A skin cloth 1301 is installed between the connecting rod 1302 and the air delivery pipe 13, and both ends of the skin cloth 1301 are fixedly connected to the connecting rod 1302 and the air delivery pipe 13 respectively. On both sides of the printing mechanism 11, a lever mechanism 14 is fitted and movably installed. Below the printing mechanism 11, a printing head 15 is fitted and fixedly installed. The printing head 15 includes a heating head 1502. Above the heating head 1502, a rotating sleeve 1501 is movably installed, and tooth grooves 15011 are equidistantly arranged around the outer surface of the rotating sleeve 1501. The tooth grooves 15011 are in meshing transmission connection with a gear installed on the driving shaft of a driving motor inside the printing mechanism 11, and the rotating sleeve 1501 is in meshing transmission connection with the gear on the driving shaft of the driving motor through the tooth grooves 15011 and is movably installed below the inside of the printing mechanism 11. On both sides below the heating head 1502, a closing plate 1503 is fitted and movably installed, and on one side above the closing plate 1503, a driving tooth shaft 1504 for sliding it is fitted and movably installed inside the heating head 1502. The driving motor is not shown, but according to the actual use requirements and the installation conditions of the equipment, when the motor can drive the rotating sleeve 1501 through the gear installed on it, the installation position of the motor can be adjusted adaptively.

[0035] As an embodiment of the present invention, as Figures 3 to 11 shown, the metal additive 16 is fitted and movably installed inside the printing mechanism 11, and the lower end of the metal additive 16 is fitted and installed between the driving rotating wheel 1103 and the auxiliary rotating wheel 1102. The lower end of the metal additive 16 is in fitting contact with the pressing plate 1101;

[0036] During operation, the arc pen 12 is powered by external electricity to supply the arc head 1202. When the thickness of the printed profile is relatively consistent, the driving wheel 1103 in the middle position is powered on and driven to rotate to maintain a stable supply of the metal additive 16. At this time, when the metal additive 16 is supplied and moved downward, the abutment plates 1101 on both sides, which are movably connected to the printing mechanism 11 through torsion springs, apply downward pressure and stretch them open to allow the metal additive 16 to pass through. When the abutment plates 1101 are stretched open, the connecting rod 1302 is movably connected to the abutment plates 1101 and the air pipe 13, and a sealing cloth skin 1301 is installed between the connecting rod 1302 and the air pipe 13, and then the abutment plates 1101 are stretched open to expand, so as to drive the connecting rod 1302 to move in The gas pipe 13 expands inwardly in both directions. At this time, the required protective gas is input into the printing mechanism 11 through the openings corresponding to the expansion of the gas pipe 13 on both sides, so as to prevent the swing head 1201 from coming into contact with oxygen and causing an oxidation reaction when the metal additive 16 is melted by the electric arc. Since the smoke generated when the electric arc melts the metal additive 16 floats up, the smoke generated is discharged through the movable groove on the printing mechanism 11 under the continuous filling of protective gas. At the same time, when the abutment plate 1101 is stretched open, the feeler rod 1104 moves accordingly and limits the movable position of the swing head 1201. When the metal additive 16 in the middle position applies downward pressure to the abutment plate 1101, the feeler rods 1104 on the abutment plates 1101 on both sides fit with the two sides of the swing head 1201. At this time, the swing head 1201 Without swinging operation, when the expansion contact 1401 on one side is pushed outward, the corresponding metal additive 16 on the other side applies downward pressure to the abutment plate 1101 on the other side below under the drive of the driving wheel 1103. At this time, the abutment plate 1101 on the other side expands under the downward pressure of the metal additive 16, thereby driving the connecting rod 1302 on the other side of the gas pipe 13 to move in the same direction. At the same time, the contact rod 1104 moves a corresponding distance under the expansion of the abutment plate 1101 to change the swing range of the swing head 1201 to the other side, thereby matching the swing range of the arc head 1202 with the range of the metal additive 16 supplied downward, thereby causing the arc emitted by the arc head 1202 to arc melt the supplied metal additive 16. Secondly, the expansion contact on one side When the head 1401 is pushed outward to make the transmission rod 1404 move a corresponding distance toward the printing mechanism 11 to fit with the driving wheel 1103, the driving gear shaft 1504 on one side rotates a corresponding distance through the distance between the transmission rod 1404 on one side and the driving wheel 1103 when moving, and the closing plate 1503 slides a corresponding distance in the heating head 1502 through the driving gear shaft 1504 rotating a corresponding distance, and then the distance that the expansion contact 1401 on one side is pushed out is used to realize the synchronous feeding of the material required for the metal additive 16 under the cover thickness, and adjust the arc melting range of the metal additive 16 by the arc head 1202 as the swing head 1201 swings, and adjust the amount of shielding gas required for the required metal additive 16 during arc melting.Meanwhile, by adjusting the sliding distance of the closing plate 1503 within the heating head 1502, the discharge coverage required for the corresponding thickness is synchronously adjusted. When the expansion contact 1401 on the other side is pushed outwards, the same principle applies. When the thicknesses on both sides are different, the expansion contacts 1401 on both sides are pushed by corresponding distances, so that the feeding amount of the metal additive 16, the swinging range of the swing head 1201, the amount of protective gas required for the metal additive 16 during arc melting, and the discharge range of the closing plate 1503 are synchronously adjusted accordingly, so as to perform arc melting printing and forming on the metal additive 16;

[0037] When the swing head 1201 arc-melts the metal additive 16, the molten metal solution of the metal additive 16 falls into the rotating sleeve 1501. The rotating sleeve 1501 is driven to rotate through the gear and the tooth groove 15011 installed on the driving shaft of the driving motor inside the printing mechanism 11, and a directional accelerating force is applied to the molten metal solution of the metal additive 16 inside it. When a directional accelerating force is applied to the molten metal solution, forced convection will be generated, so that under the action of gravity during the rotation of the rotating sleeve 1501, the molten metal solution of the metal additive 16 is discharged through the closing plate 1503, and during the covering and solidification process, the grains of the discharged molten metal solution of the metal additive 16 preferentially grow along a specific direction related to the direction of the accelerating force, thereby improving the overall strength of the metal part after the molten metal solution of the metal additive 16 cools and solidifies. By selecting materials for the printing head 15 and the printing mechanism 11 as a whole with a melting point higher than that of the metal additive 16, and performing electric heating through the heating head 1502 and the heat conduction of the heating head 1502 to the rotating sleeve 1501 after heating, it is possible to prevent the metal additive 16 from cooling and solidifying inside after being arc-melted by the swing head 1201.

[0038] As an embodiment of the present invention, as Figures 3 to 9 shown, the lever mechanism 14 includes a fixed support rod 1402 used as a fixed fulcrum, and transmission rods 1404 are fitted and movably installed on one side of the fixed support rod 1402. Expansion contacts 1401 located on one side of the printing head 15 are fixedly provided below the transmission rods 1404. Contact rods 1403 are fitted and movably installed on the inner sides above the transmission rods 1404, and the contact rods 1403 are all fitted and movably installed inside through the movable grooves provided on the printing mechanism 11. Contact heads 1405 are fixedly installed on the inner sides of the contact rods 1403, and the contact heads 1405 are in fit connection with the driving runner 1103;

[0039] During operation, since the mold table to be printed and formed is provided on the printing base 5, through the fitting of the expansion contacts 1401 on the two-side lever mechanisms 14 with the mold table, when the thickness of the mold table is relatively thick, the expansion contacts 1401 will be pushed outwards. When there is a relatively thick position on one side of the mold table, the expansion contact 1401 on one side is pushed outwards. Since the expansion contact 1401 is fixedly installed below the transmission rod 1404 and the fixed support rod 1402 serves as a fixed fulcrum, the contact rod 1403 on one side of the transmission rod 1404 moves towards the inside of the printing mechanism 11. At this time, the contact head 1405 on the contact rod 1403 slides from contacting the middle driving runner 1103 to the other side and fits with the driving runner 1103 on the other side. The contact head 1405 slides a corresponding distance due to the distance pushed by the expansion contact 1401, so that it fits with the driving runner 1103 arranged at an equal distance on the other side to form an electric current path, and the driving runners 1103 arranged at an equal distance on its path are energized to rotate and drive the operation. Thus, the metal additive 16 between the corresponding auxiliary runner 1102 and the driving runner 1103 moves downward under the rotational drive and fits with the pressing plate 1101 to apply a downward pressure on it. When the printing path moves through a relatively thick position on one side, at this time, through the torsion spring reset between the fixed support rod 1402 and the transmission rod 1404, the expansion contact 1401 can always remain in contact with the mold table and the shape after the metal additive 16 melts and cools and forms. When the other side is relatively thick, it is the same in reverse. When the thicknesses on both sides are different, the expansion contacts 1401 on both sides are pushed out corresponding distances, and the transmission rod 1404 moves into the printing mechanism 11 corresponding distances, so that when printing, the metal additive 16 can be provided with sufficient supply required for its thickness change through the drive of the driving runner 1103.

[0040] As an embodiment of the present invention, as Figures 1 to 2 shown, support feet 4 for support are fixedly installed below both sides of the printing frame 1, and a servo motor 2 for providing power is fixedly installed on one side of the printing frame 1. One end of the servo motor 2 is fixedly installed with a drive shaft 9 for transmitting power. Auxiliary rods 7 are vertically fixedly installed on both sides of the printing frame 1. Sliders 8 are nested and installed above both sides of the auxiliary rods 7, and the sliders 8 are connected to each other through a fixed rod provided. A servo motor 2 is fixedly installed on one side of one of the sliders 8. Auxiliary rotating shafts are fitted and movably installed on the sliders 8 on one side and the other side of the printing frame 1, and transmission belts 3 are nested and installed between the auxiliary rotating shafts and the drive shaft 9;

[0041] During operation, the printing frame 1 is fixedly placed by the supporting feet 4. When it is necessary to adjust the additive printing path, power is provided by the servo motor 2, and through the operation of the servo motor 2, the power is transmitted to the upper drive shaft 9 for power transmission and rotation. Since a transmission belt 3 is nested and installed between the drive shaft 9 and the auxiliary rotating shaft, the rotation of the drive shaft 9 drives the transmission belt 3 nested outside it to rotate reciprocally. Through the reverse drive of the servo motor 2, the reciprocating rotation direction of the transmission belt 3 on the drive shaft 9 and the auxiliary rotating shaft is changed to change the moving path of the printing base 5 and the printing mechanism 11. Secondly, the slider 8 is lifted by the rotation of the threaded rod 6 to change the printing height, and the auxiliary rods 7 on both sides are used to maintain the stability of the slider 8 during lifting and lowering.

[0042] As an embodiment of the present invention, as Figures 1 to 2 shown, an installation base 10 for installing the printing mechanism 11 is nested and installed on the fixed rod between the sliders 8, and the installation base 10 is fixedly connected in an embedded manner to one side of the transmission belt 3. Fixed slide rods are symmetrically installed in the middle of the printing frame 1, and a printing base 5 is movably installed in an embedded manner on the fixed slide rods. The printing base 5 is fixedly connected in an embedded manner to one side of the transmission belt 3. A threaded rod 6 is provided inside one side of the auxiliary rod 7, and the threaded rod 6 is movably installed in an embedded manner on the printing frame 1 and is movably connected in an embedded manner to the slider 8 on one side. A servo motor 2 fixedly installed on the printing frame 1 is provided below the threaded rod 6, and the drive shaft 9 on the servo motor 2 is fixedly connected to the threaded rod 6;

[0043] During operation, the installation base 10 moves on the fixed rod between the sliders 8 through the reciprocating rotation of the transmission belt 3 to control the printing path of the left and right positions. The printing base 5 controls the printing path of the front and back positions on the fixed slide rods of the printing frame 1 through the reciprocating rotation of the transmission belt 3. Secondly, the servo motor 2 below the threaded rod 6 operates to provide a rotational driving force for it, so that the slider 8 can be lifted above it through the rotation of the threaded rod 6 to control the printing path of the up and down positions.

[0044] Working principle: When adjusting the printing path of additive manufacturing, the servo motor 2 provides power, and its operation transmits the power to the upper drive shaft 9 to achieve power transmission and rotation. The rotation of the drive shaft 9 drives the outer transmission belt 3 to reciprocate. The reverse drive of the servo motor 2 changes the reciprocating rotation direction of the transmission belt 3 on the drive shaft 9 and the auxiliary rotating shaft, thereby adjusting the moving trajectories of the printing base 5 and the printing mechanism 11. The slider 8 realizes height adjustment through the rotation of the threaded rod 6, changing the printing height. The mounting base 10 moves on the fixed rod between the sliders 8 with the reciprocating rotation of the transmission belt 3 to control the printing path in the left-right direction. The printing base 5 controls the printing path in the front-back direction on the fixed slide rod of the printing frame 1 with the reciprocating rotation of the transmission belt 3. In addition, the servo motor 2 below the threaded rod 6 enables the slider 8 to rise and fall above with the rotation of the threaded rod 6 through the rotational driving force to control the printing path in the up-down direction;

[0045] Through the close fitting of the expansion contacts 1401 on the two-side lever mechanisms 14 with the mold table, when the thickness of the mold table is large, the expansion contacts 1401 will be pushed outward. When the thickness on one side of the mold table is large, the corresponding expansion contact 1401 on that side will be pushed out. Since the expansion contacts 1401 are fixedly installed below the transmission rod 1404 and use the fixed support rod 1402 as the fulcrum, the contact rod 1403 on the transmission rod 1404 will move inward into the printing mechanism 11. At this time, the contact 1405 on the contact rod 1403 will slide from the middle driving runner 1103 to the other side and fit with the driving runner 1103 on the other side. The contact 1405 slides a corresponding distance according to the distance that the expansion contact 1401 is pushed out and fits with the equally spaced driving runner 1103 on the other side to form an electric current path. In this way, the equally spaced driving runners 1103 are energized and rotated to drive the operation, so that the metal additive 16 between the corresponding auxiliary runner 1102 and the driving runner 1103 moves downward under the rotational drive and fits with the backing plate 1101 to apply a downward pressure. When the printing path moves to a thicker position on one side, through the torsion spring reset between the fixed support rod 1402 and the transmission rod 1404, the expansion contact 1401 can always remain in contact with the mold table and the shape after the metal additive 16 is melted, cooled and formed. The same is true when the thickness on the other side is large. When the thicknesses on both sides are inconsistent, the two-side expansion contacts 1401 will be pushed out by different distances accordingly, and the transmission rod 1404 will move inward into the printing mechanism 11 by a corresponding distance to ensure that the metal additive 16 provides sufficient supply required for its thickness change through the drive of the driving runner 1103 during printing;

[0046] When the thickness of the printed profile remains consistent, the driving runner 1103 is located at the central position and is energized to rotate, ensuring a stable supply of the metal additive 16. During the downward movement of the metal additive 16, pressure is exerted through the pressure plates 1101 that are movably connected to the printing mechanism 11 by torsion springs on both sides, causing them to open to allow the metal additive 16 to pass through. When the pressure plates 1101 open, they drive the connecting rod 1302 to expand towards both sides within the gas supply pipe 13, enabling the protective gas to be input into the printing mechanism 11 through the openings of the gas supply pipe 13, preventing the swing head 1201 from contacting oxygen and undergoing an oxidation reaction when the arc melts the metal additive 16. At the same time, after the pressure plates 1101 are opened, the contact rods 1104 move accordingly to limit the movement range of the swing head 1201. When the metal additive 16 at the middle position exerts pressure on the pressure plates 1101, the contact rods 1104 on the pressure plates 1101 on both sides are in contact with both sides of the swing head 1201, and at this time, the swing head 1201 will stop swinging;

[0047] When the expansion contact 1401 on one side is pushed outwards, the corresponding metal additive 16 on the other side applies a downward pressure to the bottom plate 1101 on the other side below under the drive of the drive runner 1103. At this time, the bottom plate 1101 on the other side expands under the action of the downward pressure of the metal additive 16, thereby driving the connecting rod 1302 on the other side in the gas transmission pipe 13 to move in the same direction. At the same time, the contact rod 1104 moves a corresponding distance under the expansion action of the bottom plate 1101 to change the swinging range of the swing head 1201 to the other side. In this way, the swinging range of the arc head 1202 matches the range of the metal additive 16 supplied downward, enabling the arc emitted by the arc head 1202 to effectively arc-melt the supplied metal additive 16. In addition, when the expansion contact 1401 on one side is pushed outwards, the transmission rod 1404 moves inwards a corresponding distance to fit with the drive runner 1103. The change in the distance between the transmission rod 1404 and the drive runner 1103 during the movement causes the drive gear shaft 1504 to rotate a corresponding angle. The rotation of the drive gear shaft 1504 by a corresponding angle causes the closing plate 1503 to slide a corresponding distance in the heating head 1502. Thus, through the distance by which the expansion contact 1401 on one side is pushed, the synchronous feeding of the material required for the metal additive 16 under the cover thickness is achieved. At the same time, the arc melting range of the metal additive 16 with the swing of the arc head 1202 following the swing head 1201 is adjusted, and the amount of protective gas required for the metal additive 16 during arc melting is adjusted. By adjusting the sliding distance of the closing plate 1503 in the heating head 1502, the discharge coverage amount corresponding to this thickness is synchronously adjusted. When the expansion contact 1401 on the other side is pushed outwards, the situation is opposite. When the thicknesses on both sides are inconsistent, the expansion contacts 1401 on both sides are pushed by different distances correspondingly, thereby synchronously adjusting the feeding amount of the metal additive 16, the swinging range of the swing head 1201, the amount of protective gas required for the metal additive 16 during arc melting, and the discharge range of the closing plate 1503 to achieve precise arc melting and printing forming of the metal additive 16;

[0048] When the swing head 1201 melts the metal additive 16 by electric arc, the molten metal solution of the metal additive 16 falls into the rotating sleeve 1501. The rotating sleeve 1501 rotates directionally under the action of the driving gear in the printing mechanism 11, applying a directional accelerating force to the molten metal solution of the metal additive 16 inside it. When a directional accelerating force is applied to the molten metal solution, forced convection will be generated. Under the action of gravity during the rotation of the rotating sleeve 1501, the molten metal solution of the metal additive 16 is discharged through the closing plate 1503. During the covering and solidification process, the grains of the discharged molten metal solution of the metal additive 16 preferentially grow along a specific direction related to the direction of the accelerating force, thereby improving the overall strength of the metal part after the molten metal solution of the metal additive 16 cools and solidifies. By setting the melting points of the materials selected for the printing head 15 and the printing mechanism 11 as a whole higher than that of the metal additive 16, electric heating is carried out through the heating head 1502, and heat conduction from the heating head 1502 to the rotating sleeve 1501 after heating is used to prevent the metal additive 16 from cooling and solidifying inside it after being melted by the electric arc of the swing head 1201.

[0049] It should be noted that contact sensors are provided on both sides of the swing head 1201. A processing unit and a control unit are provided inside the arc pen 12. When the swing head 1201 touches the touch rod 1104 during the swinging process, it senses the touch with the touch rod 1104 through the contact sensor and feeds the touch signal back to the processing unit inside the arc pen 12. The processing unit processes the touch information and issues a reverse driving instruction to the control unit, so that the control unit controls the driving shaft to rotate in the reverse direction to change the swinging direction of the swing head 1201.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A swing-type arc additive manufacturing printing device, comprising a printing frame (1) and a printing mechanism (11), as well as a metal additive (16), characterized in that: One side of the printing mechanism (11) is fitted with an arc pen (12), and a swing head (1201) is fitted and movably installed below the arc pen (12). An arc head (1202) is fixedly installed below the swing head (1201), and the arc head (1202) is electrically connected to the arc pen (12). The printing mechanism (11) includes a pressing plate (1101), and the pressing plate (1101) is fitted and movably installed on both sides of the upper part inside the printing mechanism (11). On both sides above the pressing plate (1101), an auxiliary rotating wheel (1102) and a driving rotating wheel (1103) installed on the printing mechanism (11) are fixedly installed at equal intervals. On one side of the pressing plate (1101), a contact rod (1104) is fixedly installed, and the swing head (1201) is in fitting and movable contact with the contact rod (1104). On one side above the printing mechanism (11), an air delivery pipe (13) is fitted and fixedly installed. On both sides of one end inside the air delivery pipe (13), connecting rods (1302) are fitted and movably installed, and the connecting rods (1302) are all in fitting and movable connection with the pressing plate (1101). A skin cloth (1301) is installed between the connecting rod (1302) and the air delivery pipe (13), and both ends of the skin cloth (1301) are fixedly connected to the connecting rod (1302) and the air delivery pipe (13) respectively. On both sides of the printing mechanism (11), a lever mechanism (14) is fitted and movably installed. Below the printing mechanism (11), a print head (15) is fitted and fixedly installed. The print head (15) includes a heating head (1502). Above the heating head (1502), a rotating sleeve (1501) is movably installed, and tooth grooves (15011) are equidistantly arranged around the outer surface of the rotating sleeve (1501). The tooth grooves (15011) are in meshing transmission connection with a gear installed on the driving shaft of a driving motor inside the printing mechanism (11), and the rotating sleeve (1501) is in meshing transmission connection with the gear on the driving shaft of the driving motor through the tooth grooves (15011) and is movably installed below the inside of the printing mechanism (11). On both sides below the heating head (1502), closing plates (1503) are fitted and movably installed, and on one side above the closing plates (1503), driving tooth shafts (1504) for sliding are fitted and movably installed inside the heating head (1502).

2. The swing type arc additive manufacturing printing device according to claim 1, characterized in that: The lever mechanism (14) includes a fixed support rod (1402) used as a fixed fulcrum, and transmission rods (1404) are fitted and movably installed on one side of the fixed support rod (1402). Below the transmission rods (1404), expansion contacts (1401) located on one side of the print head (15) are fixedly provided.

3. The swing-type arc additive manufacturing printing device according to claim 2, characterized in that: Contact rods (1403) are fitted and movably installed on the inner sides above the transmission rods (1404), and the contact rods (1403) are all fitted and movably installed inside the printing mechanism (11) through movable slots provided on the printing mechanism (11). Contact heads (1405) are fixedly installed on the inner sides of the contact rods (1403), and the contact heads (1405) are in fitting connection with the driving rotating wheel (1103).

4. A swing-type arc additive manufacturing printing device according to claim 1, characterized in that: The metal additive (16) is fitted and movably installed inside the printing mechanism (11), and the lower end of the metal additive (16) is fitted and installed between the driving runner (1103) and the auxiliary runner (1102), and the lower end of the metal additive (16) is in close contact with the bottom plate (1101).

5. A swing-type arc additive manufacturing printing device according to claim 1, characterized in that: Supporting feet (4) for support are fixedly installed below the printing frame (1), and a servo motor (2) for providing power is fixedly installed on one side of the printing frame (1). One end of the servo motor (2) is fixedly installed with a driving shaft (9) for transmitting power, and auxiliary rods (7) are vertically and fixedly installed on both sides of the printing frame (1).

6. The swing type arc additive manufacturing printing device according to claim 5, characterized in that: Sliders (8) are nested and installed above both of the auxiliary rods (7) on both sides, and the sliders (8) are connected to each other by a fixed rod provided. A servo motor (2) is fixedly installed on one side of one of the sliders (8). Auxiliary rotating shafts are fitted and movably installed on the sliders (8) on one side and the other side of the printing frame (1), and transmission belts (3) are nested and installed between the auxiliary rotating shafts and the driving shaft (9).

7. The swing type arc additive manufacturing printing device according to claim 6, characterized in that: An installation base (10) for installing the printing mechanism (11) is nested and installed on the fixed rod between the sliders (8), and the installation base (10) is fitted and fixedly connected to one side of the transmission belt (3). Fixed sliding rods are symmetrically installed in the middle of the printing frame (1), and a printing base (5) is fitted and movably installed on the fixed sliding rods, and the printing base (5) is fitted and fixedly connected to one side of the transmission belt (3).

8. The swing type arc additive manufacturing printing device according to claim 5, characterized in that: A threaded rod (6) is provided inside one of the auxiliary rods (7) on one side, and the threaded rod (6) is fitted and movably installed on the printing frame (1) and is fitted and movably connected to the slider (8) on one side. A servo motor (2) is fixedly installed below the threaded rod (6) on the printing frame (1), and the driving shaft (9) on this servo motor (2) is fixedly connected to the threaded rod (6).

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