Magnetic field assisted laser additive manufacturing equipment

Abstract

The invention relates to the technical field of additive manufacturing equipment manufacturing, and discloses magnetic field assisted laser additive manufacturing equipment, which comprises a base, a laser cladding head, a magnetic field assisted laser additive manufacturing device, a magnetic field assisted laser additive manufacturing device and a magnetic field assisted laser additive manufacturing device, a polishing assembly; a transmission assembly; and a locking assembly; the first electromagnet is driven by the driving piece to move in the direction close to the second electromagnet, the first electromagnet drives the grinding assembly to move synchronously till the grinding assembly is located above the containing area, at the moment, the first electromagnet triggers the locking assembly, and the transmission assembly and the grinding assembly are connected and locked; the transmission assembly drives the polishing assembly to do reciprocating rectilinear motion on the surface of the metal substrate, the surface, to be subjected to material adding, of the metal substrate can be automatically polished, the surface of the metal substrate is automatically treated before material adding, it is ensured that no impurity or uneven surface exists in a laser deposition action area, and the laser deposition efficiency is improved. The stability of the molten pool is prevented from being influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing equipment manufacturing, and particularly relates to a magnetic field-assisted laser additive manufacturing device. Background Art

[0002] Laser additive manufacturing is an efficient additive manufacturing technology. It uses a laser beam to act on a powder material pre-coated on the surface of a metal substrate or synchronously fed onto the surface of the metal substrate, melting the material and the surface of the metal substrate, and solidifying during the subsequent cooling process to form an alloy layer with a low dilution rate and good metallurgical bonding on the surface of the metal substrate, achieving the purpose of surface repair or additive manufacturing of the material.

[0003] Currently, there are already some prior arts that can apply a laser cladding-assisted magnetic field to the molten pool on the surface of a workpiece. For example, the patent publication number is CN212419636U. Its main technical means is to control a laser, a powder feeder, and an argon gas tank through a controller to achieve fixed-point deposition of a laser cladding head. At the same time, the controller controls an XYZ three-axis motion platform to meet the additive manufacturing motion trajectory of a turbine blade, ensuring that the required scanning trajectory is always in the laser deposition action area, thereby enabling each moment in the molten pool during the magnetic field-assisted laser additive manufacturing of the turbine blade to be affected by a magnetic field of equal intensity. After analysis, the disadvantages of this technical solution are as follows: Before the metal substrate is placed in the magnetic field unit, it needs to be polished and pickled and dried. However, the existing magnetic field-assisted laser additive manufacturing equipment does not have a structure for automatically polishing the surface to be added. Impurities or uneven surfaces in the laser deposition action area are extremely likely to affect the stability of the formed molten pool, thereby resulting in the additive manufacturing effect not reaching the expected effect. Based on this, the present invention provides a magnetic field-assisted laser additive manufacturing device with a simple and ingenious structure that can automatically polish the surface to be added before additive manufacturing. Summary of the Invention

[0004] The purpose of the present invention is to provide a magnetic field-assisted laser additive manufacturing device for the deficiencies of the prior art, so as to solve the technical problem that there are impurities or uneven surfaces in the laser deposition action area of the metal substrate and it cannot be automatically polished before additive manufacturing.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A magnetic field-assisted laser additive manufacturing device, comprising: A base, on which there is a bracket for placing a metal substrate. A laser cladding head is installed on the base, and a control component for driving the laser cladding head to move is also installed. A first electromagnet is slidably installed on one side of the bracket, and a second electromagnet is fixed on the other side. The first electromagnet is driven by a driving member installed on the base to perform linear motion; A polishing component, which is slidably installed on the base and is installed on the first electromagnet through an elastic telescopic rod; A transmission assembly, which is mounted on the base; and A locking assembly, which is mounted on the base and connected to the transmission assembly; when the driving member drives the first electromagnet to move to trigger the locking assembly, the transmission assembly is connected and locked with the grinding assembly, and the transmission assembly drives the grinding assembly to perform a reciprocating linear motion on the surface of the metal substrate.

[0006] As a further solution of the present invention: the grinding assembly includes a frame slidably mounted on the bracket, and assembly plates are respectively installed at both ends thereof. A grinding plate is installed at the bottom of each assembly plate, and the bottom surface of the grinding plate contacts the surface to be additively manufactured of the metal substrate.

[0007] As a further solution of the present invention: the distance between the two grinding plates is greater than the length of the metal substrate, and when the distance between the first electromagnet and the second electromagnet is the largest, only the grinding plate far from the first electromagnet is located above the metal substrate placement area, and the grinding plate close to the first electromagnet is located outside the metal substrate placement area.

[0008] As a further solution of the present invention: the transmission assembly includes: A box body, which is fixed on the bottom plate, and the bottom plate is mounted on the base; A half gear, which is rotatably mounted on the box body and driven to rotate by a driving source; and A rack ring, which is slidably mounted on the box body and meshes with the half gear, and the rack ring is connected to the locking assembly.

[0009] As a further solution of the present invention: the locking assembly includes: A travel switch, which is mounted on the bottom plate. A trigger rod is fixed on the first electromagnet, and the moving path of the trigger rod interferes with the position of the travel switch; and A third electromagnet, which is fixed on the frame. The rack ring is fixedly connected to a fourth electromagnet, and the fourth electromagnet is arranged through the box body; when the first electromagnet moves to the trigger rod to trigger the travel switch, the third electromagnet and the fourth electromagnet are energized, and at this time, the two are magnetically attracted to each other.

[0010] As a further solution of the present invention: the third electromagnet and the fourth electromagnet are engaged.

[0011] As a further solution of the present invention: the bottom of the base plate is connected to the base through an elastic telescopic plate, a lifting component is arranged on the base, and the movable end of the lifting component is connected to the base plate. A displacement sensor is arranged on the bracket for monitoring the moving displacement of the first electromagnet. The displacement sensor is connected to the driving source, and the frame body is slidably installed at the movable end of the elastic telescopic rod; when the displacement sensor monitors that the moving displacement of the first electromagnet reaches the threshold value, the driving source stops, and then the trigger rod slides away from the travel switch, so that the third electromagnet and the fourth electromagnet are powered off, and the lifting component is started to drive the base plate and the transmission component to rise.

[0012] As a further solution of the present invention: the lifting component includes: A bushing, which is rotatably installed at the fixed end of the elastic telescopic plate, and a rotating shaft is sleeved inside it. The bushing is fixedly connected to the rotating shaft; A first shaft body, which is fixed at the top of the rotating shaft. A ring body is sleeved outside the first shaft body, and the two are rotatably connected. A slider is fixed on the ring body, and the slider is slidably installed at the bottom of the base plate; A second shaft body, which is fixed at the bottom of the rotating shaft, and a push block is sleeved outside it; and A push plate, which is fixed on the first electromagnet, and the moving path of the push plate interferes with the position of the push block. Limit blocks are respectively fixed at the top and bottom of the push plate, and the push plate slides between the two limit blocks.

[0013] The beneficial effects of the present invention: (1) In the present invention, the driving member drives the first electromagnet to move towards the second electromagnet. During this process, the elastic telescopic rod is in a free state, and the first electromagnet drives the grinding assembly to move synchronously until the grinding assembly is located above the placement area. At this time, the first electromagnet triggers the locking assembly, and the transmission assembly and the grinding assembly are connected and locked. The transmission assembly drives the grinding assembly to perform a reciprocating linear motion on the surface of the metal substrate, which can automatically grind the surface of the metal substrate to be added material, realizing the automatic treatment of the surface of the metal substrate before additive manufacturing, ensuring that there are no impurities or uneven surfaces in the laser deposition area, thus avoiding affecting the stability of the molten pool; (2) In the present invention, when the first electromagnet moves to a position where the two grinding plates are respectively located on both sides of the metal substrate, the trigger rod touches the travel switch, then the third electromagnet and the fourth electromagnet are powered on, and the two are magnetically attracted to each other. Subsequently, the rack ring and the frame body are linked, and the two perform a reciprocating linear motion synchronously, so that the grinding plates can perform a reciprocating linear motion on the surface of the metal substrate to be added material, thereby realizing the grinding treatment of the surface; (3) In the present invention, when the displacement sensor monitors that the moving displacement of the first electromagnet reaches the threshold value, the driving source stops, and then the trigger rod slides away from the travel switch, so that the third electromagnet and the fourth electromagnet are powered off, and the lifting assembly is activated to drive the bottom plate and the transmission assembly to rise. During this process, the grinding assembly can be stationary in the horizontal direction to avoid affecting the movement of the laser cladding head, and can also be lifted in the vertical direction, so as to move the grinding assembly away from the metal substrate, ensuring that the grinding assembly does not affect the stability of the molten pool, and also ensuring that the third electromagnet and the fourth electromagnet do not affect the alternating magnetic field between the first electromagnet and the second electromagnet, thereby ensuring the smoothness and stability of the additive manufacturing, and minimizing the adverse impact of the setting of the grinding assembly on the additive manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure when the locking assembly in the present invention is triggered; Figure 3 is a schematic diagram of the structure after the bottom plate is lifted in the present invention; Figure 4 is a schematic diagram of the structure of the grinding assembly in the present invention; Figure 5 is a schematic diagram of the structure of the transmission assembly in the present invention; Figure 6 is a schematic diagram of the structure of the locking assembly in the present invention; Figure 7 is in the present invention Figure 5 partial enlarged schematic diagram of part A; Figure 8 is a schematic diagram of the structure of the third electromagnet in the present invention; Figure 9 is a schematic diagram of the structure of the fourth electromagnet in the present invention; Figure 10 is a schematic diagram of the structure of the lifting assembly in the present invention; Figure 11 is a schematic diagram of the structure of the first shaft body in the present invention; Figure 12 is a schematic diagram of the structure of the push plate in the present invention; Figure 13 is a schematic diagram of the structure of the rotating shaft in the vertical state in the present invention.

[0016] In the figure: 1, base; 2, support; 3, laser cladding head; 4, grinding assembly; 401, frame; 402, assembly plate; 403, grinding plate; 5, first electromagnet; 6, second electromagnet; 7, elastic telescopic rod; 8, transmission assembly; 801, box body; 802, half gear; 803, rack ring; 9, locking assembly; 901, travel switch; 902, trigger rod; 903, third electromagnet; 904, fourth electromagnet; 10, driving member; 11, displacement sensor; 12, bottom plate; 13, elastic telescopic plate; 14, lifting assembly; 1401, bushing; 1402, rotating shaft; 1403, first shaft body; 1404, ring body; 1405, slider; 1406, second shaft body; 1407, pushing block; 1408, pushing plate; 1409, limiting block; 15, control assembly. Detailed implementation manners

[0017] 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 creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1 - 2 As shown in the figure, the present invention is a magnetic field-assisted laser additive manufacturing device, including: A base 1, on which a support 2 for placing a metal substrate is provided. A laser cladding head 3 is installed on the base 1, and a control assembly 15 for driving the movement of the laser cladding head 3 is also installed. A first electromagnet 5 is slidably installed on one side of the support 2, and a second electromagnet 6 is fixed on the other side thereof. The first electromagnet 5 is driven by a driving member 10 installed on the base 1 to perform linear motion; A grinding assembly 4, which is slidably installed on the base 1 and is installed on the first electromagnet 5 through an elastic telescopic rod 7; A transmission assembly 8, which is installed on the base 1; and A locking assembly 9, which is installed on the base 1 and is connected to the transmission assembly 8; when the driving member 10 drives the first electromagnet 5 to move to trigger the locking assembly 9, the transmission assembly 8 is connected and locked with the grinding assembly 4, and the transmission assembly 8 drives the grinding assembly 4 to perform reciprocating linear motion on the surface of the metal substrate.

[0019] In a case of this embodiment, the control component 15 includes an XYZ three-axis motion platform and a controller. The controller controls the XYZ three-axis motion platform to satisfy the additive manufacturing motion trajectory of the workpiece. Both the first electromagnet 5 and the second electromagnet 6 are connected to the controller. When the first electromagnet 5 and the second electromagnet 6 are energized, an alternating magnetic field is generated. The driving member 10 can be selected from components such as a hydraulic cylinder and a pneumatic cylinder, or other mechanisms capable of realizing linear motion. This embodiment does not specifically limit it here. The elastic telescopic rod 7 is a structure formed by nesting multi-stage pipe fittings, and a spring is arranged inside it. In actual application, a rack and pinion or an electric telescopic rod structure can also be adopted. This embodiment does not specifically limit it here.

[0020] Among them, the input end of the laser cladding head 3 is respectively connected to the output ends of a laser, a powder feeder, and an argon gas tank. The laser, the powder feeder, and the argon gas tank are respectively connected to the controller. The control component 15, the first electromagnet 5, the second electromagnet 6, the driving member 10, the elastic telescopic rod 7, the laser, the powder feeder, the argon gas tank, and the controller are all prior arts. This application has not improved them. Therefore, it is not necessary to disclose their specific mechanical structures and circuit structures, which does not affect the integrity of this application.

[0021] In actual application of this embodiment, the metal substrate is placed in the placement area on the bracket 2. At this time, the laser cladding head 3 is at the highest point of its moving path. Both the first electromagnet 5 and the second electromagnet 6 are de-energized, and the distance between them is the largest. Subsequently, the driving member 10 drives the first electromagnet 5 to move in the direction close to the second electromagnet 6. During this process, the elastic telescopic rod 7 is in a free state. The first electromagnet 5 drives the grinding assembly 4 to move synchronously until the grinding assembly 4 is located above the placement area. At this time, the first electromagnet 5 triggers the locking assembly 9, and then the transmission assembly 8 is connected and locked with the grinding assembly 4. The transmission assembly 8 drives the grinding assembly 4 to perform a reciprocating linear motion on the surface of the metal substrate, which can automatically grind the surface of the metal substrate to be additively manufactured, realizing the automatic treatment of the surface of the metal substrate before additive manufacturing, ensuring that there are no impurities or uneven surfaces in the laser deposition action area, thereby avoiding affecting the stability of the molten pool. After grinding, the first electromagnet 5 moves to the position where the distance between it and the second electromagnet 6 is the smallest, and the first electromagnet 5 and the second electromagnet 6 are symmetrically arranged. At this time, the controller controls the laser, the powder feeder, and the argon gas tank to realize the fixed-point deposition of the laser cladding head 3. At the same time, the controller controls the XYZ three-axis motion platform to satisfy the additive manufacturing motion trajectory of the metal substrate, ensuring that the required scanning trajectory is always in the laser deposition action area, and further realizing that the molten pool inside is subjected to an equal-intensity magnetic field at each moment during the process of magnetic field-assisted laser additive manufacturing of the metal substrate.

[0022] As Figures 1 - 4As shown, as a preferred embodiment of the present invention, the grinding assembly 4 includes a frame body 401 slidably mounted on the bracket 2, and assembly plates 402 are respectively installed at both ends thereof. A grinding plate 403 is installed at the bottom of each assembly plate 402, and the bottom surface of the grinding plate 403 contacts the surface of the metal substrate to be additively manufactured.

[0023] Among them, the grinding plate 403 and the assembly plate 402 are connected by a detachable connection method such as a snap connection or a paste connection.

[0024] In one case of this embodiment, the distance between the two grinding plates 403 is greater than the length of the metal substrate. When the distance between the first electromagnet 5 and the second electromagnet 6 is the largest, only the grinding plate 403 far from the first electromagnet 5 is located above the metal substrate placement area, and the grinding plate 403 close to the first electromagnet 5 is located outside the metal substrate placement area.

[0025] In actual application of this embodiment, in the initial state, the distance between the first electromagnet 5 and the second electromagnet 6 is the largest. At this time, only the grinding plate 403 far from the first electromagnet 5 is located above the metal substrate placement area, and the grinding plate 403 close to the first electromagnet 5 is located outside the metal substrate placement area. The metal substrate can be inserted through the gap between the grinding plate 403 far from the first electromagnet 5 and the bracket 2 to place the metal substrate in the placement area of the bracket 2; when the driving member 10 drives the first electromagnet 5 to move to trigger the locking assembly 9, the two grinding plates 403 are respectively located on both sides of the metal substrate. At this time, the moving path of the laser cladding head 3 is located between the two grinding plates 403, which can prevent the arrangement of the grinding plates 403 from blocking the movement of the laser cladding head 3.

[0026] As Figures 1 - 7 shown, as a preferred embodiment of the present invention, the transmission assembly 8 includes: A box body 801, which is fixed on the bottom plate 12, and the bottom plate 12 is installed on the base 1; A half gear 802, which is rotatably mounted on the box body 801 and is driven to rotate by a driving source; and A rack ring 803, which is slidably mounted on the box body 801 and meshes with the half gear 802, and the rack ring 803 is connected to the locking assembly 9.

[0027] In one case of this embodiment, the driving source can be a motor assembly, or a gear assembly or a pulley assembly driven by a motor, as long as it can make the half gear 802 rotate. This embodiment does not make specific limitations here.

[0028] In actual application of this embodiment, tooth block groups are respectively arranged on two inner sides of the rack ring 803, and both tooth block groups are engaged with the half gear 802; a driving source drives the half gear 802 to rotate. When the half gear 802 rotates to be engaged with the tooth block group on one side of the rack ring 803, the half gear 802 continues to rotate to drive the rack ring 803 to translate until it rotates away from the tooth block group on this side. Subsequently, when the half gear 802 rotates to be engaged with the tooth block group on the other side of the rack ring 803, the half gear 802 continues to rotate to drive the rack ring 803 to translate in the reverse direction until it rotates away from the tooth block group on this side. By repeating this process, a reciprocating linear motion of the rack ring 803 can be achieved. When the locking component 9 locks the transmission component 8 and the grinding component 4, the rack ring 803 drives the grinding component 4 to perform a reciprocating linear motion on the surface of the metal substrate, thereby realizing the grinding treatment of the surface to be additively manufactured of the metal substrate.

[0029] As Figures 1 - 9 shown, as a preferred embodiment of the present invention, the locking component 9 includes: A travel switch 901, which is installed on the bottom plate 12. A trigger rod 902 is fixed on the first electromagnet 5, and the moving path of the trigger rod 902 interferes with the position of the travel switch 901; and A third electromagnet 903, which is fixed on the frame body 401. The rack ring 803 is fixedly connected to a fourth electromagnet 904, and the fourth electromagnet 904 is arranged through the box body 801; when the first electromagnet 5 moves to the trigger rod 902 to trigger the travel switch 901, the third electromagnet 903 and the fourth electromagnet 904 are energized, and at this time, they attract each other magnetically.

[0030] In a case of this embodiment, the travel switch 901, the third electromagnet 903, and the fourth electromagnet 904 are all connected to a controller, and the travel switch 901, the third electromagnet 903, and the fourth electromagnet 904 are all prior arts, and no improvements are made to them in this application. Therefore, it is not necessary to disclose their specific mechanical structures and circuit structures, which does not affect the integrity of this application.

[0031] In actual application of this embodiment, in the initial state, the distance between the third electromagnet 903 and the fourth electromagnet 904 is the largest, and at this time, they are in a power-off state; when the first electromagnet 5 moves to the two grinding plates 403 are respectively located on both sides of the metal substrate, the trigger rod 902 triggers the travel switch 901, then the third electromagnet 903 and the fourth electromagnet 904 are energized, and they attract each other magnetically. Subsequently, the rack ring 803 and the frame body 401 are linked, and both perform a reciprocating linear motion synchronously, so that the grinding plate 403 can perform a reciprocating linear motion on the surface to be additively manufactured of the metal substrate, thereby realizing the grinding treatment of this surface.

[0032] As Figures 8 - 9As shown, as a preferred embodiment of the present invention, the third electromagnet 903 is engaged with the fourth electromagnet 904.

[0033] In actual application of this embodiment, when the first electromagnet 5 moves to a position where the two grinding plates 403 are respectively located on both sides of the metal substrate, the third electromagnet 903 contacts and can be engaged with the fourth electromagnet 904. At this time, the trigger rod 902 triggers the travel switch 901, the third electromagnet 903 and the fourth electromagnet 904 are energized, and their magnetic fields attract each other. The engagement setting can enhance the stability of the close contact state between the third electromagnet 903 and the fourth electromagnet 904, thereby ensuring the stability of the reciprocating movement of the driving assembly 8 driving the grinding assembly 4.

[0034] As Figures 1 - 13 As shown, as a preferred embodiment of the present invention, the bottom of the base plate 12 is connected to the base 1 through an elastic telescopic plate 13. An elevation assembly 14 is provided on the base 1, and the movable end of the elevation assembly 14 is connected to the base plate 12. A displacement sensor 11 is provided on the bracket 2 for monitoring the moving displacement of the first electromagnet 5. The displacement sensor 11 is connected to the drive source. The frame body 401 is slidably installed at the movable end of the elastic telescopic rod 7; when the displacement sensor 11 monitors that the moving displacement of the first electromagnet 5 reaches the threshold value, the drive source stops, and then the trigger rod 902 slides away from the travel switch 901, so that the third electromagnet 903 and the fourth electromagnet 904 are de-energized, and the elevation assembly 14 is activated to drive the base plate 12 and the driving assembly 8 to rise.

[0035] Among them, the installation end of the elastic telescopic plate 13 is fixedly connected to the base 1, and its movable end is connected to the bottom of the base plate 12; the elastic telescopic plate 13 is a structure formed by nesting multiple-stage pipe fittings, and a spring is provided inside it. In actual application, a gear-rack or electric telescopic rod structure can also be used, and this embodiment does not specifically limit it here; a vertical plate (not shown) is fixed on the frame body 401, and the vertical plate is slidably installed at the movable end of the elastic telescopic rod 7; the displacement sensor 11 is connected to the controller, and the displacement sensor 11 is a prior art. This application does not improve it. Therefore, it is not necessary to disclose its specific mechanical structure and circuit structure, which does not affect the integrity of this application.

[0036] In one case of this embodiment, the elevation assembly 14 includes: A bushing 1401, which is rotatably installed at the fixed end of the elastic telescopic plate 13, and a rotating shaft 1402 is sleeved inside it. The bushing 1401 is fixedly connected to the rotating shaft 1402; A first shaft body 1403, which is fixed to the top end of the rotating shaft 1402. A ring body 1404 is sleeved outside the first shaft body 1403, and the two are rotatably connected. A slider 1405 is fixed on the ring body 1404, and the slider 1405 is slidably installed at the bottom of the base plate 12; A second shaft body 1406, which is fixed to the bottom end of the rotating shaft 1402, and a push block 1407 is sleeved outside thereof; and A push plate 1408, which is fixed to the first electromagnet 5, and the moving path thereof interferes with the position of the push block 1407. Limiting blocks 1409 are respectively fixed to the top and bottom of the push plate 1408, and the push plate 1408 slides between the two limiting blocks 1409.

[0037] In actual application of this embodiment, the slider 1405 is the movable end of the lifting component 14; in the initial state, the bottom plate 12 is at the lowest point of its moving path. When the first electromagnet 5 moves to a position where the two grinding plates 403 are respectively located on both sides of the metal substrate, the first electromagnet 5 is at a point on its moving path and has not reached the end of the moving path. At this time, the push plate 1408 moves to contact the push block 1407, and the push block 1407 contacts the limiting block 1409 at the top. At the same time, the trigger rod 902 triggers the travel switch 901, then the third electromagnet 903 and the fourth electromagnet 904 are powered off, and the displacement sensor 11 monitors that the moving displacement of the first electromagnet 5 reaches the threshold value, then the drive source stops, so the transmission component 8 will not drive the grinding component 4 to perform reciprocating linear motion, and the two grinding plates 403 remain on both sides of the metal substrate without translation; subsequently, the driving member 10 drives the first electromagnet 5 to continue moving in the direction close to the second electromagnet 6 until the first electromagnet 5 reaches the end of its moving path. During this process, the push plate 1408 pushes the push block 1407 to move in the direction close to the second electromagnet 6, thereby driving the rotating shaft 1402 and the bushing 1401 to rotate, then the first shaft body 1403 can rotate and drive the ring body 1404 to rise, then the elastic telescopic plate 13 stretches, and at the same time the slider 1405 slides on the bottom of the bottom plate 12 in the direction away from the second electromagnet 6 until the rotating shaft 1402 turns to the vertical state. At this time, the push block 1407 contacts the limiting block 1409 at the bottom, and both the bottom plate 12 and the transmission component 8 rise to the highest point. At this time, the first electromagnet 5 moves to one side relative to the bracket 2 and is symmetrically arranged with the second electromagnet 6, that is, at the end of the path of the first electromagnet 5, the distance between it and the second electromagnet 6 is the smallest. Through the engagement of the third electromagnet 903 and the fourth electromagnet 904, the frame 401 rises synchronously when the bottom plate 12 and the transmission component 8 rise. During this process, a relative sliding in the vertical direction occurs between the frame 401 and the movable end of the elastic telescopic rod 7. Such a setting can not only achieve the static state of the grinding component 4 in the horizontal direction to avoid affecting the movement of the laser cladding head 3, but also achieve the elevation of the grinding component 4 in the vertical direction, so as to move the grinding component 4 away from the metal substrate, ensure that the grinding component 4 will not affect the stability of the molten pool, and also ensure that the third electromagnet 903 and the fourth electromagnet 904 will not affect the alternating magnetic field between the first electromagnet 5 and the second electromagnet 6, thereby ensuring the smoothness and stability of the additive manufacturing and minimizing the adverse impact of the setting of the grinding component 4 on the additive manufacturing process.

[0038] Working principle of the present invention: In the above embodiments of the present invention, a magnetic field-assisted laser additive manufacturing device is provided. The driving member 10 drives the first electromagnet 5 to move towards the second electromagnet 6. During this process, the elastic telescopic rod 7 is in a free state. The first electromagnet 5 drives the grinding assembly 4 to move synchronously until the grinding assembly 4 is located above the placement area. At this time, the first electromagnet 5 triggers the locking assembly 9, and then the transmission assembly 8 is connected and locked with the grinding assembly 4. The transmission assembly 8 drives the grinding assembly 4 to perform a reciprocating linear motion on the surface of the metal substrate, which can automatically grind the surface of the metal substrate to be additively manufactured, realizing the automatic treatment of the surface of the metal substrate before additive manufacturing, ensuring that there are no impurities or uneven surfaces in the laser deposition area, thereby avoiding affecting the stability of the molten pool.

[0039] The above has described a detailed description of an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A magnetic field-assisted laser additive manufacturing device, characterized in that, Comprising: A base (1) is provided with a bracket (2) for placing a metal substrate. A laser cladding head (3) is installed on the base (1), and a control component (15) for driving the laser cladding head (3) to move is also installed. A first electromagnet (5) is slidably installed on one side of the bracket (2), and a second electromagnet (6) is fixed on the other side thereof. The first electromagnet (5) is driven by a driving member (10) installed on the base (1) to perform linear motion; A grinding component (4) is slidably installed on the base (1) and is installed on the first electromagnet (5) through an elastic telescopic rod (7); A transmission component (8) is installed on the base (1); And A locking component (9) is installed on the base (1) and is connected to the transmission component (8); when the driving member (10) drives the first electromagnet (5) to move to trigger the locking component (9), the transmission component (8) is connected and locked with the grinding component (4), and the transmission component (8) drives the grinding component (4) to perform reciprocating linear motion on the surface of the metal substrate.

2. The magnetic field-assisted laser additive manufacturing device according to claim 1, wherein The grinding component (4) includes a frame body (401) slidably installed on the bracket (2). Assembly plates (402) are installed at both ends thereof. A grinding plate (403) is installed at the bottom of each assembly plate (402), and the bottom surface of the grinding plate (403) contacts the surface to be additively manufactured of the metal substrate.

3. The magnetic field-assisted laser additive manufacturing device according to claim 2, wherein, The distance between the two grinding plates (403) is greater than the length of the metal substrate, and when the distance between the first electromagnet (5) and the second electromagnet (6) is the largest, only the grinding plate (403) far from the first electromagnet (5) is located above the metal substrate placement area, and the grinding plate (403) close to the first electromagnet (5) is located outside the metal substrate placement area.

4. The magnetic field assisted laser additive manufacturing device according to claim 2, characterized in that, The transmission component (8) includes: A box body (801) is fixed on a bottom plate (12), and the bottom plate (12) is installed on the base (1); A semi-gear (802) is rotatably installed on the box body (801) and is driven to rotate by a driving source; and A rack ring (803) is slidably installed on the box body (801) and meshes with the semi-gear (802). The rack ring (803) is connected to the locking component (9).

5. The magnetic field assisted laser additive manufacturing device according to claim 4, characterized in that, The locking component (9) includes: A travel switch (901) is installed on the bottom plate (12). A trigger rod (902) is fixed on the first electromagnet (5), and the moving path of the trigger rod (902) interferes with the position of the travel switch (901); and A third electromagnet (903) is fixed on the frame body (401). The rack ring (803) is fixedly connected to a fourth electromagnet (904), and the fourth electromagnet (904) is disposed through the box body (801); when the first electromagnet (5) moves to the trigger rod (902) to trigger the travel switch (901), the third electromagnet (903) and the fourth electromagnet (904) are energized, and at this time, the magnetic forces of the two are attracted to each other.

6. The magnetic field assisted laser additive manufacturing device according to claim 5, characterized in that, The third electromagnet (903) is engaged with the fourth electromagnet (904).

7. The magnetic field assisted laser additive manufacturing device according to claim 6, wherein The bottom of the bottom plate (12) is connected to the base (1) through an elastic telescopic plate (13). An elevation assembly (14) is provided on the base (1), and the movable end of the elevation assembly (14) is connected to the bottom plate (12). A displacement sensor (11) is provided on the bracket (2) for monitoring the moving displacement of the first electromagnet (5). The displacement sensor (11) is connected to a drive source. The frame body (401) is slidably mounted on the movable end of the elastic telescopic rod (7). When the displacement sensor (11) monitors that the moving displacement of the first electromagnet (5) reaches the threshold value, the drive source stops. Subsequently, the trigger rod (902) slides away from the travel switch (901), then the third electromagnet (903) and the fourth electromagnet (904) are powered off, and the elevation assembly (14) is activated to drive the bottom plate (12) and the transmission assembly (8) to rise.

8. The magnetic field assisted laser additive manufacturing device according to claim 7, wherein, The elevation assembly (14) includes: A bushing (1401) rotatably mounted at the fixed end of the elastic telescopic plate (13), and a rotating shaft (1402) is sleeved therein. The bushing (1401) is fixedly connected to the rotating shaft (1402); A first shaft body (1403) fixed to the top end of the rotating shaft (1402). A ring body (1404) is sleeved outside the first shaft body (1403), and the two are rotatably connected. A slider (1405) is fixed on the ring body (1404), and the slider (1405) is slidably mounted on the bottom of the bottom plate (12); A second shaft body (1406) fixed to the bottom end of the rotating shaft (1402), and a push block (1407) is sleeved outside it; and A push plate (1408) fixed to the first electromagnet (5), and its moving path interferes with the position of the push block (1407). Limit blocks (1409) are respectively fixed to the top and bottom of the push plate (1408), and the push plate (1408) slides between the two limit blocks (1409).

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