Double-laser material increasing equipment based on double-frequency electromagnetic induction synchronous heat treatment

Abstract

The utility model provides double-laser material adding equipment based on double-frequency electromagnetic induction synchronous heat treatment, and relates to the technical field of laser material adding. The double-laser additive manufacturing equipment comprises a laser emitting device, a merging device, a magnetic field device and a workbench. The magnetic field device comprises an electromagnet, a wire and a battery pack, the magnetic field device is arranged on the workbench, the electromagnet is an annular magnet, the merging device is arranged above the circle center of the electromagnet, the merging device comprises a shell and a collecting lens, the shell is of a hollow structure, an annular groove is formed in the inner wall of the shell, and the collecting lens is clamped in the groove. The laser emitting device is arranged above the merging device and provided with two laser emitting holes, and the laser emitting holes correspond to the collecting lenses; the merging device is arranged to refract the two laser beams to one point, the magnetic field device is arranged to enable the cladding process to be affected by a magnetic field, thick columnar dendritic crystals generated in cladding are avoided, cracks and holes generated in a cladding layer are reduced, and the cladding effect is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of laser additive technology, and in particular to a dual laser additive device based on dual-frequency electromagnetic induction synchronous heat treatment. BACKGROUND

[0002] Laser additive devices use laser cladding technology to process the surface of the device. Laser cladding is a new type of remanufacturing technology that uses the heat emitted by a laser to simultaneously melt powder and the surface of the substrate, and then solidifies to obtain a coating on the substrate surface with high bonding strength and low dilution rate. Laser cladding has the advantages of simple operation, easy implementation of large-area repair, good combination effect, etc., and can obtain a dense and high-performance alloy cladding layer, and has been widely used in steel, aviation and shipbuilding industries to improve the surface performance of the substrate, such as corrosion resistance, wear resistance, oxidation resistance and high temperature resistance.

[0003] In the prior art, in order to prolong the service life of workpieces, devices, etc., a coating with excellent performance is usually selected for the sealing surface. Among various welding methods, laser cladding technology has become a key technology for preparing a sealing surface cladding layer due to its fast cooling, uniform and fine microstructure, wide material selection, and controllable coating dilution rate.

[0004] However, due to the high temperature gradient and fast solidification rate of laser cladding technology, the solidification structure of the coating is prone to form directional coarse columnar dendrites. Coarse columnar dendrites can reduce the mechanical properties of the cladding layer on the one hand, and can cause cracks and pores in the cladding layer on the other hand, which seriously affects the performance of the cladding layer and restricts the development of laser cladding in industrial applications. CONTENT OF THE INVENTION

[0005] The present disclosure provides a dual laser additive device based on dual-frequency electromagnetic induction synchronous heat treatment to solve the problem of the formation of directional coarse columnar dendrites in the solidification structure of the coating caused by laser cladding technology, which reduces the mechanical properties of the cladding layer and causes cracks and pores in the cladding layer, which seriously affects the performance of the cladding layer.

[0006] The dual laser additive device based on dual-frequency electromagnetic induction synchronous heat treatment provided by the present disclosure adopts the following technical solution:

[0007] The double-frequency electromagnetic induction synchronous heat treatment based double laser additive equipment comprises a laser emitting device, a merging device, a magnetic field device and a workbench.

[0008] By adopting the above technical scheme, two laser beams are emitted by the laser emitting device, the power of laser cladding is enhanced, and the efficiency is improved.

[0009] Optionally, the outer side of the electromagnet is provided with a control device, and the two ends of the wire are respectively connected with the control device and the output port of the battery pack.

[0010] By adopting the above technical scheme, the electromagnet is provided with power supply by the battery pack, and the operation of the electromagnet and the change of the magnetic field in the electromagnet are controlled by the control device, so that the cladding effect is improved by changing the magnetic field.

[0011] Optionally, a placing table is arranged on the workbench, the placing table is located at the center of the electromagnet and does not contact the electromagnet, and a sample is placed on the placing table.

[0012] By adopting the above technical scheme, the sample is placed on the placing table and located at the center of the magnetic field.

[0013] Optionally, a horizontal moving mechanism is arranged on the workbench, the horizontal moving mechanism comprises a support, a sliding rail and a sliding block, the support is arranged on the workbench, the sliding rail is arranged on the support along the length direction of the support, a sliding groove is arranged in the sliding rail, and a plurality of sliding blocks are arranged in the sliding rail.

[0014] By adopting the above technical scheme, the horizontal moving mechanism is arranged to facilitate the horizontal movement of the merging mechanism, the position of the merging device is adjusted according to the position of the laser emitter, the laser is focused on a point, and the laser power and the cladding effect are improved.

[0015] Optionally, the transverse moving mechanism is provided with a longitudinal moving mechanism, the longitudinal moving mechanism comprises a sliding plate, an adjusting column and a moving plate, the sliding plate is fixed on the top surface of the sliding block, the adjusting column is fixed on the sliding plate, the adjusting column is provided with an inner clamping groove, the inner clamping groove penetrates through one side of the adjusting column, one end of the moving plate is clamped in the inner clamping groove, and the other end of the moving plate is provided with a fixing ring which is sleeved on the shell of the merging device.

[0016] By adopting the above technical scheme, the longitudinal moving mechanism is arranged, the height of the merging device is adjusted conveniently, the laser focus point can be adjusted according to the thickness of different samples, and the laser can be focused on the sample surface.

[0017] Optionally, the outer side of the fixing ring is provided with a connecting rod which is rotationally connected with the moving plate.

[0018] By adopting the above technical scheme, the merging device is fixed by arranging the fixing ring, the merging device can be rotationally adjusted by arranging the connecting rod, and the laser refraction angle is controlled.

[0019] Optionally, the shell is provided with a powder feeding pipe which is communicated with one side of the shell.

[0020] By adopting the above technical scheme, the powder feeding pipe is arranged to spray raw materials, when the laser melts the sample surface, the powder is sprayed on the object surface at the same time, and the powder is combined with the sample surface after solidification

[0021] Optionally, the shell is provided with a gas conveying pipe which is communicated with one side of the shell.

[0022] By adopting the above technical scheme, the inert gas is conveyed by the gas conveying pipe to isolate air during cladding, and the cladding quality is improved.

[0023] In summary, the present disclosure includes at least the following beneficial technical effects of the dual laser additive equipment based on dual-frequency electromagnetic induction synchronous heat treatment:

[0024] 1. The laser emitting device emits two lasers, enhances the power of laser cladding, improves the efficiency, the merging device refracts two lasers to a point, the condenser refracts the laser to a point to enhance the cladding power, the magnetic field device is arranged to make the cladding process affected by the magnetic field, avoid the generation of coarse columnar dendrites, reduce the cracks and pores generated in the cladding layer, and improve the cladding effect;

[0025] 2. The battery pack provides power for the electromagnet, the control device controls the operation of the electromagnet and the change of the magnetic field in the electromagnet, so that the cladding effect is improved by changing the magnetic field;

[0026] 3. The gas conveying pipe conveys inert gas to isolate air during cladding, and improves the cladding quality. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1It is a schematic diagram of the overall structure of a dual laser additive equipment based on dual-frequency electromagnetic induction synchronous heat treatment.

[0028] Figure 2 It is a schematic diagram of the structure for embodying the merging device in the embodiment.

[0029] Figure 3 It is a schematic diagram of the structure for embodying the fixing ring in the embodiment.

[0030] Figure 4 It is a schematic diagram of the structure for embodying the laser emitting device in the embodiment.

[0031] In the figure, 1, laser emitting device; 2, merging device; 21, shell; 211, groove; 22, condenser; 3, magnetic field device; 31, electromagnet; 311, control device; 32, wire; 33, battery pack; 4, workbench; 5, placing table; 6, sample; 7, transverse moving mechanism; 71, support; 72, sliding rail; 721, sliding groove; 73, sliding block; 8, longitudinal moving mechanism; 81, sliding plate; 82, adjusting column; 821, inner clamping groove; 83, moving plate; 9, fixing ring; 91, connecting rod; 10, powder feeding pipe; 11, gas conveying pipe; 12, laser emitting hole. DETAILED DESCRIPTION

[0032] The following will be described in detail in combination with the accompanying drawings. Figure 1 - the accompanying drawings Figure 4 The present disclosure will be further described in detail.

[0033] Reference will be made to Figure 1 , Figure 2 , Figure 3 , Figure 4 The dual laser additive equipment based on dual-frequency electromagnetic induction synchronous heat treatment comprises a laser emitting device 1, a merging device 2, a magnetic field device 3, and a workbench 4. The magnetic field device 3 comprises an electromagnet 31, a wire 32, and a battery pack 33. The magnetic field device 3 is arranged on the workbench 4. The electromagnet 31 is a ring-shaped magnet. A control device 311 is arranged outside the electromagnet 31. The control device 311 can control the size and transformation of the dual-frequency magnetic field generated by the electromagnet 31. The wire 32 is connected to the control device 311 and the output port of the battery pack 33 at both ends. The merging device 2 is arranged above the center of the electromagnet 31. The merging device 2 comprises a shell 21 and a condenser 22. The condenser 22 arranged therein can focus the laser beam to a specific working area. The magnetic field device 3 arranged in combination can generate a magnetic field after being powered on. In combination with the dual-frequency electromagnetic induction synchronous heat treatment function, the magnetic field can have multiple effects on the material being subjected to additive manufacturing.

[0034] It should be noted that the magnetic field is associated with the cladding area, for example, when the magnetic field is turned on, the magnetic field covers the cladding area. Since the cladding process is carried out in this magnetic field environment, and the magnetic field is changing, it has an impact on the crystallization process of the cladding material. At the microscopic level, the changing magnetic field will interfere with the arrangement of atoms in the cladding material and the direction of crystal growth, reducing the number of coarse columnar dendrites, thereby reducing the generation of cracks and pores in the cladding layer. The close association between the magnetic field and the cladding area is achieved by the position design of the electromagnet 31 and the coverage range of the magnetic field.

[0035] Referring to Figure 1 , the shell 21 is a hollow structure, and an annular groove 211 is formed on the inner wall of the shell 21. The condenser 22 is clamped in the groove 211, and the condenser 22 can be a specially designed concave mirror. The shell 21 is provided with a powder feeding pipe 10 on one side, and the powder feeding pipe 10 delivers powder for cladding on the surface of the sample 6. The laser emitting device 1 is arranged above the merging device 2, and the laser emitting device 1 is provided with two laser emitting holes 12 corresponding to the condenser 22. The laser emitted by the laser emitting device 1 is irradiated on the condenser 22 in the up-down direction.

[0036] Further, the embodiment further provides the laser emitting device 1 on the merging device 2, and the laser emitting hole 12 corresponds to the condenser 22, which can ensure that the laser beam is accurately projected onto the condenser 22. The condenser 22 can focus the laser beam, thereby significantly improving the energy density of the laser, and further enabling the device to adapt to various materials and processing techniques, such as surface modification, welding and other processing techniques in addition to additive manufacturing. At the same time, two laser beams can be focused on the working area at the same time, and the two laser beams can be controlled more finely by setting different parameters (such as power, pulse frequency, etc.).

[0037] Further, in the embodiment, by providing two laser emitting holes 12, two laser beams can be emitted at the same time, increasing the energy input, which is beneficial to more energy input in additive manufacturing, thereby improving the cladding rate of the material. At the same time, the two laser beams can also work cooperatively to achieve more precise control of the shape and temperature distribution of the molten pool.

[0038] Further, in some preferred embodiments, referring to Figure 1 , the workbench 4 is provided with a placement table 5, and the placement table 5 is made of a material that does not affect the change of the magnetic field. The placement table 5 is located at the center of the electromagnet 31 and does not contact the electromagnet 31, and the sample 6 can be placed on the placement table 5.

[0039] Further, in some preferred embodiments, referring to Figure 1The workbench 4 is provided with a transverse moving mechanism 7, which comprises a support 71, a sliding rail 72 and a sliding block 73. The support 71 is arranged on the workbench 4, the sliding rail 72 is arranged on the support 71 along the length direction of the support 71, and the sliding rail 72 is provided with a sliding groove 721. The sliding block 73 is arranged in a plurality of sliding blocks, and the sliding block 73 is clamped in the sliding rail 72.

[0040] It should be understood that in the dual laser additive manufacturing process, the laser needs to act accurately on a specific position of the workpiece. The equipment transverse moving mechanism 7 can adjust the position of the merging device 2, thereby accurately controlling the processing position.

[0041] Further, in other preferred embodiments, referring to Figure 1 and Figure 3 , the transverse moving mechanism 7 is provided with a longitudinal moving mechanism 8, which comprises a sliding plate 81, an adjusting column 82 and a moving plate 83. The sliding plate 81 is fixed on the top surface of the sliding block 73, the adjusting column 82 is fixed on the sliding plate 81, the adjusting column 82 is provided with an inner clamping groove 821, the inner clamping groove 821 penetrates through one side of the adjusting column 82, the moving plate 83 is clamped in the inner clamping groove 821, the other end of the moving plate 83 is provided with a fixing ring 9, the inner clamping groove 821 and the moving plate 83 are tightly clamped, so that the moving plate 83 will not slide under non-manual operation, and the fixing ring 9 is sleeved on the shell 21 of the merging device 2. The outer side of the fixing ring 9 is provided with a connecting rod 91, the connecting rod 91 is rotationally connected with the moving plate 83, and there is only a small rotation angle between the connecting rod 91 and the moving plate 83, which is used for fine adjustment of the horizontal arrangement of the condenser 22.

[0042] The longitudinal moving mechanism 8 is integrally carried on the transverse moving mechanism 7, so that the entire longitudinal moving system can move in the horizontal direction with the sliding block 73 of the transverse moving mechanism 7. Such design realizes flexible movement in a two-dimensional plane and expands the processing range of the equipment. That is, the combination of the transverse moving mechanism 7 and the longitudinal moving mechanism 8 of the present embodiment provides the equipment with accurate movement capability in a two-dimensional plane. The components of the longitudinal moving mechanism 8 cooperate with each other to realize height adjustment of the merging device 2 and horizontal adjustment of the condenser 22, so as to accurately control the focusing position and angle of the laser according to different processing requirements, thereby improving the processing precision and flexibility of the equipment.

[0043] Further, in other preferred embodiments, referring to Figure 1 and Figure 2 , one side of the shell 21 is provided with a gas conveying pipe 11, and the gas conveying pipe 11 conveys helium gas or other gas as inert gas.

[0044] The implementation principle of the embodiment of the present disclosure is as follows:

[0045] In actual operation, first, the electromagnet 31 is turned on by the control device 311 to form a magnetic field, then the two laser beams emitted by the laser emitting device 1 are used to adjust the horizontal moving mechanism 7 and the vertical moving mechanism 8 to ensure that the two laser irradiation points are combined on the surface of the sample 6, then the inert gas is conveyed into the gas conveying pipe 11 and the powder is added into the powder conveying pipe 10, so that the powder is melted on the surface of the sample 6 by the laser, under the action of the changing magnetic field of the electromagnet 31, the coarse columnar dendrites are reduced, and the cracks and pores in the cladding layer are reduced.

[0046] The embodiments of the present specific embodiment are the preferred embodiments of the present disclosure, and are not intended to limit the protection scope of the present disclosure, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present disclosure should be covered within the protection scope of the present disclosure.

Claims

1. Dual laser additive equipment based on dual frequency electromagnetic induction simultaneous heat treatment, characterized in that, The double laser additive equipment comprises a laser emitting device (1), a merging device (2), a magnetic field device (3) and a workbench (4), wherein, The magnetic field device (3) comprises an electromagnet (31), a wire (32) and a battery pack (33), the magnetic field device (3) is arranged on the workbench (4), the merging device (2) is arranged above the center of the electromagnet (31), the merging device (2) comprises an outer shell (21) and a condenser (22), the outer shell (21) is a hollow structure, and an annular groove (211) is formed in the inner wall of the outer shell (21), the condenser (22) is clamped in the annular groove (211), the laser emitting device (1) is arranged above the merging device (2), and the laser emitting device (1) is provided with two laser emitting holes (12), and the laser emitting holes (12) correspond to the condenser (22).

2. The dual laser additive equipment based on dual-frequency electromagnetic induction simultaneous heat treatment according to claim 1, characterized in that: The outer side of the electromagnet (31) is provided with a control device (311), and the two ends of the wire (32) are respectively connected with the control device (311) and the output port of the battery pack (33).

3. The dual laser additive equipment based on dual-frequency electromagnetic induction simultaneous heat treatment of claim 1, wherein: A placing table (5) is arranged on the workbench (4), the placing table (5) is located at the center of the electromagnet (31) and does not contact the electromagnet (31), and the placing table (5) is used for placing a sample (6).

4. The dual laser additive equipment based on dual-frequency electromagnetic induction simultaneous heat treatment of claim 1, wherein: A transverse moving mechanism (7) is arranged on the workbench (4), the transverse moving mechanism (7) comprises a support (71), a sliding rail (72) and a sliding block (73), the support (71) is arranged on the workbench (4), the sliding rail (72) is arranged on the support (71) and extends along the length direction of the support (71), the sliding rail (72) is provided with a sliding groove (721), and a plurality of sliding blocks (73) are arranged.

5. The dual laser additive equipment based on dual-frequency electromagnetic induction simultaneous heat treatment according to claim 4, characterized in that: A longitudinal moving mechanism (8) is arranged on the transverse moving mechanism (7), the longitudinal moving mechanism (8) comprises a sliding plate (81), an adjusting column (82) and a moving plate (83), the sliding plate (81) is fixed to the top surface of the sliding block (73), the adjusting column (82) is fixed to the sliding plate (81), the adjusting column (82) is provided with an inner clamping groove (821) penetrating through one side of the adjusting column (82), one end of the moving plate (83) is clamped in the inner clamping groove (821), and the other end of the moving plate (83) is provided with a fixing ring (9) which is sleeved on the outer shell (21) of the merging device (2).

6. The dual laser additive equipment based on dual-frequency electromagnetic induction simultaneous heat treatment according to claim 5, characterized in that: A connecting rod (91) is arranged on the outer side of the fixing ring (9) and rotationally connected with the moving plate (83).

7. The dual laser additive equipment based on dual-frequency electromagnetic induction simultaneous heat treatment of claim 1, wherein: A powder feeding pipe (10) is arranged on one side of the outer shell (21) in communication.

8. The dual laser additive equipment based on dual-frequency electromagnetic induction simultaneous heat treatment of claim 1, wherein: A gas conveying pipe (11) is arranged on one side of the outer shell (21) in communication.

Images