Space three-dimensional green repair forming metal remanufacturing system with coaxially arranged light materials

Abstract

The utility model relates to the technical field of laser cladding, in particular to a space three-dimensional green repair forming metal remanufacturing system with coaxially arranged light materials. Comprising a laser cladding nozzle, an adjustable nozzle module connected to one end of a powder conveying pipe in the laser cladding nozzle, a gas cylinder used for conveying gas into the adjustable nozzle module, a pressure relief module used for discharging the gas in the adjustable nozzle module and a CCD camera module used for monitoring the state of a molten pool on a substrate in real time. Through cooperation of the adjustable nozzle module, the gas cylinder and the pressure relief module, the adjustable nozzle module can adjust the size of a nozzle in real time according to the part forming requirement, stacking type green repairing of formed parts with different section sizes is achieved, operation steps are greatly simplified, the forming period is shortened, cost reduction and efficiency improvement are achieved, and the production efficiency is improved. Meanwhile, by means of the design of the CCD camera module, it is guaranteed that the cladding precision of the formed material piece is always kept at a high standard, and the quality of the formed material piece is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser cladding technical field, concretely relates to a kind of space stereoscopic green repair forming metal remanufacturing system of light material coaxial arrangement. BACKGROUND

[0002] Now advanced manufacturing technology field such as laser cladding and 3D printing are searched, and it is found that patent number:CN106444049A laser broadband cladding device, CN105562951A a laser light in-wire feeding device for laser cladding, CN107627002A laser cladding device, CN107217257A laser cladding device and CN106583726A laser multi-beam cladding device, all adopt the way of combination of beam splitter and focusing mirror, laser beam is separated and focused into rectangular hollow or circular hollow laser beam, and then laser cladding material enters the hollow area of spot from one side, so that laser cladding material jet flow and hollow spot achieve coaxial relationship, and the coaxial relationship in light is realized in principle.

[0003] However, the above-mentioned disclosed patent technology has significant disadvantages, as follows:

[0004] 1. Spot and powder jet flow shape solidification: the shape of the spot and the powder jet flow cannot be flexibly changed according to the working condition requirements, and can only be operated according to the pre-set fixed mode; and then the disclosed technical solution is only suitable for carrying out single specification shape laser cladding green repair or stereoscopic forming operation, and cannot meet other working condition requirements (such as variable cross-section overhanging structure material, unequal wall thickness structure material and variable cross-section inverted suspension forming);

[0005] 2. Poor function and working condition adaptability: in the existing patent solution, the shape of the spot and the powder flow cannot be flexibly changed according to the working condition requirements, the function is relatively single, and the type of working condition that can be adapted is limited, which not only cannot meet the diversified working condition use requirements, but also makes the use cost high;

[0006] 3. Powder feeding aperture adjustment is inconvenient: in the disclosed patent solution, if the size of the powder feeding aperture needs to be changed, the machine must be stopped to replace the nozzle with different diameter, which means that the size of the nozzle aperture cannot be adjusted in real time during the laser cladding green repair process, and thus the size of the powder beam delivered to the molten pool cannot be controlled, which seriously restricts the forming efficiency of complex parts, and even in some cases, the forming work of complex parts is difficult to carry out. UTILITY MODEL CONTENTS

[0007] The utility model provides a kind of space stereoscopic green repair forming metal remanufacturing system of light material coaxial arrangement to solve the problems raised in the above background technology.

[0008] To solve the above technical problems, the utility model adopts the technical scheme that

[0009] A kind of space stereo green repair forming metal remanufacturing system of light material coaxial arrangement, including laser cladding spray head, adjustable nozzle module connected to the one end of powder pipe in the laser cladding spray head, gas cylinder for conveying gas to the inside of the adjustable nozzle module, pressure relief module for discharging gas in the inside of the adjustable nozzle module and CCD camera module for monitoring the state of molten pool on substrate in real time, the monitoring area of the CCD camera module corresponds to the ejection end of the adjustable nozzle module, laser beam generated by the laser cladding spray head is coaxially arranged with adjustable nozzle module, and is used to wrap adjustable nozzle module, and the adjustable nozzle module is realized nozzle opening reduction by the input of gas, and the adjustable nozzle module is realized nozzle opening increase by the discharge of gas.

[0010] Preferably, the adjustable nozzle module includes a nozzle tube connected to the one end of the powder pipe, a gas cavity opened in the nozzle tube, and a gas inlet and a gas outlet opened on the surface of the nozzle tube and communicated with the gas cavity. The gas inlet is used for gas input, and the gas outlet is used for gas discharge.

[0011] Preferably, the nozzle tube is made of soft memory material.

[0012] Preferably, the adjustable nozzle module further includes a sealed and heat-insulated shell arranged on the outer wall of the nozzle tube, and the inner wall of the sealed and heat-insulated shell is matched with the outer wall of the nozzle tube.

[0013] Preferably, the longitudinal section of the gas cavity is annular.

[0014] Preferably, the inner side of the gas inlet is connected with a first gas pipe, one end of the first gas pipe away from the gas inlet is connected with the gas cylinder, and the inner side of the gas outlet is connected with a second gas pipe, one end of the second gas pipe away from the gas outlet is connected with the pressure relief module.

[0015] Preferably, the laser cladding spray head includes a connecting plate, an upper cover installed on the connecting plate, a support frame connected to the bottom of the upper cover, a wire feeding pipe support connected to the support frame, and a collimator mechanism installed on the top of the upper cover. A beamsplitter mechanism and a plurality of reflecting focusing mirror mechanisms are installed on the top of the support frame. The plurality of reflecting focusing mirror mechanisms are distributed in equidistant array with the beamsplitter mechanism as the center.

[0016] Preferably, a plurality of reflecting light path through holes corresponding to the reflecting focusing mirror mechanisms are opened on the support frame. The laser beams emitted from the collimator mechanism pass through the beamsplitter mechanism and the reflecting focusing mirror mechanisms, and are projected from the reflecting light path through holes to realize the wrapping of the adjustable nozzle module.

[0017] Preferably, the CCD camera module comprises a camera and a signal transmitter, the CCD camera module is electrically connected with the control module of the gas cylinder and the pressure relief module respectively, and the CCD camera module is used for controlling the gas supply of the gas cylinder and the pressure relief of the pressure relief module.

[0018] Preferably, the control center and the motion arm are further included, the control center is electrically connected with the control module of the gas cylinder and the pressure relief module respectively, the control center is used for controlling the gas supply of the gas cylinder and the pressure relief of the pressure relief module, and the motion arm is used for driving the laser cladding nozzle to move.

[0019] By adopting the above technical scheme, the utility model discloses the obtained beneficial effect is:

[0020] In the utility model, through the cooperation of adjustable nozzle module, gas cylinder and pressure relief module, the adjustable nozzle module can adjust the size of nozzle in real time according to the demand of part forming, and then realizes the accumulation type green repair of different section size forming parts, greatly simplifies the operation step, shortens the forming period, realizes the cost reduction and benefit increase, and simultaneously, with the design of CCD camera module, also ensures that the cladding precision of forming material part always maintains at high standard, effectively guarantees the quality of forming material part.

[0021] In the utility model, according to the working condition demand of laser cladding green repair or laser 3D printing forming, the utility model can adjust the powder flow shape size and the spot size according to the demand, ensures that the powder flow size and the spot energy size are adaptively adjusted, until the working condition demand is satisfied, improves the forming quality and efficiency, to meet the functional diversity demand. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the front view part cross section structure schematic diagram of the utility model.

[0023] Figure 2 It is the rear view structure schematic diagram of the utility model.

[0024] Figure 3 It is Figure 2 It is the enlarged structure schematic diagram of A place in the middle.

[0025] Figure 4 It is the control system schematic diagram of the utility model.

[0026] Figure 5 It is the nozzle pipe opening size contrast schematic diagram of the utility model.

[0027] Figure 6 It is the schematic diagram of the utility model for triangular material part forming.

[0028] Figure 7 The utility model discloses a schematic diagram for the forming of the overhanging material piece.

[0029] Figure 8 The utility model discloses a schematic diagram for the forming of the material piece with unequal wall thickness.

[0030] Figure 9 The utility model discloses a schematic diagram for the forming of the upside-down and overhanging material piece.

[0031] Figure 10 The utility model discloses a schematic diagram of the adjustable nozzle module, the CCD camera module, the gas cylinder and the pressure relief module.

[0032] In the figure: 1, laser cladding spray head, 2, powder conveying pipe, 3, adjustable nozzle module, 31, nozzle pipe, 32, air cavity, 33, air inlet, 34, air outlet, 4, gas cylinder, 5, pressure relief module, 6, base plate, 7, CCD camera module, 8, sealed heat insulation shell, 9, first gas pipe, 10, second gas pipe, 11, connecting plate, 12, upper cover, 13, support frame, 14, wire feeding pipe support, 15, collimator mechanism, 16, beam splitter mechanism, 17, reflecting focusing mirror mechanism, 18, reflected light path through -hole, 19, moving arm. DETAILED DESCRIPTION

[0033] In order to enable the above-mentioned purpose, features and advantages of the utility model to be more clearly understood, the following will further illustrate the utility model with the figures and examples. It needs to be explained that the examples and features in the examples of the present application can be combined with each other without conflict.

[0034] It needs to be explained that when an element is called "assembled", "mounted", "fixed" or "arranged" to another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this paper are only for the purpose of illustration and do not represent the only embodiment.

[0035] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from the description herein, therefore, the utility model is not limited to the specific embodiments disclosed in the following description. Example one

[0036] As Figures 1-10As shown in the utility model provides a kind of space three-dimensional green repair forming metal remanufacturing system of light material coaxial arrangement, including laser cladding spray head 1, adjustable nozzle module 3 connected to the one end of powder pipe 2 in laser cladding spray head 1, gas cylinder 4 for conveying high-pressure gas to the inside of adjustable nozzle module 3, pressure relief module 5 for discharging high-pressure gas inside adjustable nozzle module 3 and CCD camera module 7 for real-time monitoring the state of molten pool 6 on substrate 6, the monitoring area of CCD camera module 7 corresponds to the ejection end of adjustable nozzle module 3, wherein, CCD camera module 7 includes camera and signal transmitter, CCD camera module 7 is electrically connected with the control module of gas cylinder 4 and pressure relief module 5 respectively, and CCD camera module 7 is used to control the gas conveying of gas cylinder 4 and the degassing of pressure relief module 5, laser beam generated by laser cladding spray head 1 is coaxially arranged with adjustable nozzle module 3, and is used to wrap adjustable nozzle module 3.

[0037] As further, laser cladding spray head 1 includes connecting plate 11, upper cover 12 mounted on connecting plate 11, support frame 13 connected to the bottom of upper cover 12, wire feeding pipe support 14 connected to support frame 13 and collimator mechanism 15 mounted on the top of upper cover 12, and the top of support frame 13 is provided with a beamsplitter mechanism 16 and a plurality of reflection focusing mirror mechanisms 17, and the plurality of reflection focusing mirror mechanisms 17 are distributed in equidistant array with beamsplitter mechanism 16 as the center, wherein, the beamsplitter in beamsplitter mechanism 16 is provided with at least two beamsplitter surfaces, and each beamsplitter surface is a plane, and the reflection focusing mirrors in the plurality of reflection focusing mirror mechanisms 17 one-to-one correspond to the beamsplitter surfaces on the beamsplitter, to realize that the reflection focusing mirrors receive the reflected light beams emitted by collimator mechanism 15, and simultaneously convert the reflected light beams into focused light beams.

[0038] As further, support frame 13 is provided with a plurality of reflection light path through holes 18 corresponding to the reflection focusing mirror mechanisms 17 one-to-one, and the laser beams emitted by collimator mechanism 15 are projected from reflection light path through holes 18 after passing through beamsplitter mechanism 16 and reflection focusing mirror mechanisms 17, to realize the wrapping of adjustable nozzle module 3, as specific, Figure 1 As shown, when the laser beams emitted by collimator mechanism 15 are projected on the beamsplitter of beamsplitter mechanism 16 via the path, the beamsplitter can divide the laser beams into multiple beams to be projected on the reflection focusing mirrors of corresponding reflection focusing mirror mechanisms 17, and then the laser beams reflected by the reflection focusing mirrors are projected to adjustable nozzle module 3 below to form envelope light spot (combined with Figure 5It is to be noted that the multi-beam technology formed by the laser cladding nozzle 1 described above is a known public technology, and more details can be referred to the public patents cited in the background art, which will not be described in more details herein.

[0039] It is to be noted that the multi-beam technology formed by the laser cladding nozzle 1 described above is a known public technology, and more details can be referred to the public patents cited in the background art, which will not be described in more details herein.

[0040] In combination with Figure 2 and Figure 3 As further shown in FIG. 2, the adjustable nozzle module 3 includes a nozzle tube 31 connected to one end of the powder feeding tube 2, a gas cavity 32 opened in the nozzle tube 31, and a gas inlet 33 and a gas outlet 34 opened on the surface of the nozzle tube 31 and communicated with the gas cavity 32, the gas inlet 33 is used for input of gas, and the gas outlet 34 is used for discharge of gas, and the adjustable nozzle module 3 further includes a sealing and heat insulation shell 8 arranged on the outer wall of the nozzle tube 31, and the inner wall of the sealing and heat insulation shell 8 is matched with the outer wall of the nozzle tube 31.

[0041] The gas cavity 32 in the adjustable nozzle module 3 realizes the reduction of the nozzle opening by input of gas, and vice versa.

[0042] In combination with Figure 2 and Figure 10 As further shown in FIG. 2, the inner side of the gas inlet 33 is connected with a first gas pipe 9, one end of the first gas pipe 9 away from the gas inlet 33 is connected with the gas cylinder 4, and the inner side of the gas outlet 34 is connected with a second gas pipe 10, one end of the second gas pipe 10 away from the gas outlet 34 is connected with the pressure relief module 5, and in the present scheme, the gas discharge of the pressure relief module 5 and the gas feeding of the gas cylinder 4 are both operated by receiving signals from the control system (control center or CCD camera module 7). It is to be noted that those skilled in the art can directly use the existing pump equipment when implementing how to input the high-pressure gas in the gas cylinder 4 into the gas cavity 32 and how to discharge the high-pressure gas in the gas cavity 32 to the atmosphere through the pressure relief module 5, and since the pump equipment is a known technology, it will not be described in more details herein.

[0043] As further shown in FIG. 2, Figure 3As shown, the longitudinal section of the air cavity 32 is annular. Through the design of the annular cavity, when the opening of the nozzle tube 31 opens and closes due to the increase or decrease of air pressure, more comprehensive and stable response can be achieved, ensuring that air pressure uniformly acts on the opening periphery and effectively avoiding opening and closing deviation, thereby effectively improving the precision in the product forming process and providing strong protection for high-quality production.

[0044] As further, the nozzle tube 31 is made of soft memory material. Specifically, the nozzle tube 31 is made of soft memory material, which has unique properties. Under the action of high-pressure gas, it will deform, and after the high-pressure gas is discharged, it will gradually recover to the initial shape at a slow and stable speed, to ensure the working stability of the adjustable nozzle module 3, realize stable cladding of the product, ensure the forming precision, and effectively avoid permanent deformation caused by long-term use or complex working conditions. The soft memory material includes but is not limited to polyurethane sponge, shape memory polymer, shape memory hydrogel and shape memory alloy.

[0045] In combination Figure 4 As another control implementation, a space three-dimensional green repair forming metal remanufacturing system with coaxial arrangement of light materials also includes a control center electrically connected with the control module of the gas cylinder 4 and the pressure relief module 5, and the control center is used to control the gas supply of the gas cylinder 4 and the gas discharge of the pressure relief module 5.

[0046] In combination Figure 2 As further, a space three-dimensional green repair forming metal remanufacturing system with coaxial arrangement of light materials also includes a motion arm 19, which is used to drive the laser cladding nozzle 1 to move. The motion arm 19 adopts existing known technology, and will not be described in detail herein.

[0047] As further, Figure 5 The two figures in the figure are three-beam spot displays corresponding to different opening sizes of the adjustable nozzle module 3. The left figure has an opening size of 2mm, and the right figure has an opening size of 1mm. In this way, according to the Figure 5 As known, the larger the opening, the more powder is discharged. Based on this, the corresponding spot range also needs to be increased synchronously. The size change of the spot range needs to be moved by the motion arm 19 to drive the laser cladding nozzle 1 to move a distance along the cross-sectional direction, so that the defocusing amount is increased, and then the spot range is expanded, to ensure that the increased powder amount can be completely cladded. Conversely, the laser cladding nozzle 1 moves a distance along the cross-sectional direction, so that the defocusing amount is reduced, and then the spot range is reduced.

[0048] As further, as shown in Figure 6As shown, for the forming of triangular material, the large area or even full area coverage can be achieved by changing the size of the powder nozzle. When a complex shape needs to be printed layer by layer, the same layer of cladding only needs to change the size of the powder nozzle to cover the full area or most of the area, avoiding repeated back and forth cladding in the same layer, improving the cladding efficiency and powder utilization rate.

[0049] As shown in Figure 7 As shown, for the forming of overhanging material, starting from the root of the material, the cross-sectional shape of the material is from large to small, so the amount of powder delivered and the size of the spot also need to be changed. The specific manufacturing process is as follows:

[0050] First, the control center transmits a signal to the pressure relief module 5, and the pressure relief module 5 reduces the gas pressure in the gas cavity 32 after receiving the signal to ensure that the nozzle opening is enlarged, so that the powder output is increased; at the same time, the cladding head moves a certain distance along the cross-sectional direction, causing the defocus amount to increase, thereby expanding the light spot coverage range to ensure that the newly added powder can be fully cladded. At the same time, the CCD camera module 7 monitors the molten pool morphology and cross-sectional profile in real time, and adjusts the size of the nozzle opening accurately as soon as an abnormality is found.

[0051] Second, with the change of cladding, the control center transmits a signal to the gas cylinder 4, and the gas cylinder 4 increases the gas pressure in the gas cavity 32 after receiving the signal to reduce the nozzle opening and reduce the powder output; at the same time, the cladding head moves a certain distance along the cross-sectional direction, causing the defocus amount to decrease, thereby reducing the light spot range to ensure that the light spot size matches the powder output, achieving precise control of the cladding effect. At the same time, the CCD camera module 7 monitors the molten pool morphology and cross-sectional profile in real time, and adjusts the size of the nozzle opening accurately as soon as an abnormality is found.

[0052] Third, finally, according to the control center transmitting a signal to the gas cylinder 4, the gas cylinder 4 continuously receives the signal and increases the gas pressure in the gas cavity 32, thereby continuously reducing the nozzle opening, and at the same time, the cladding head continuously moves a certain distance along the cross-sectional direction to ensure that the continuously reduced light spot range size matches the powder output, and finally achieves the forming of the overhanging material.

[0053] As shown in Figure 8 As shown, for the forming of material with unequal wall thickness, starting from one end of the material with larger cross-section, the cross-sectional shape of the material is from large to small and then to large, so the amount of powder delivered and the size of the light spot also need to be changed. The specific manufacturing process is as follows:

[0054] First, the control center transmits a signal to the pressure relief module 5. After receiving the signal, the pressure relief module 5 reduces the gas pressure inside the gas chamber 32 to ensure that the nozzle opening is enlarged, thereby increasing the amount of powder output. At the same time, the cladding head moves a specific distance along the cross-sectional direction, which increases the defocusing amount and expands the coverage of the light spot to ensure that the newly added amount of powder can be fully clad. Meanwhile, during the entire cladding process, the CCD camera module 7 monitors the morphology and cross-sectional contour of the molten pool in real time. Once an abnormality is detected, the size of the nozzle opening is immediately and precisely adjusted.

[0055] Second, as the cladding process changes, the control center transmits a signal to the gas cylinder 4. After receiving the signal, the gas cylinder 4 increases the gas pressure in the gas chamber 32, causing the nozzle opening to decrease and reducing the powder output. At the same time, the cladding head moves a specific distance along the cross-sectional direction, resulting in a decrease in defocusing and a reduction in the spot size. This ensures that the spot size matches the powder output, achieving precise control of the cladding effect. Meanwhile, the CCD camera module 7 monitors the morphology and cross-sectional profile of the molten pool in real time. Once an abnormality is detected, the nozzle opening size is immediately and precisely adjusted.

[0056] Third, according to the signal transmitted from the control center to the pressure relief module 5, the pressure relief module 5 reduces the gas pressure inside the gas chamber 32 after receiving the signal, so as to ensure that the nozzle opening is expanded and the powder output increases. At the same time, the cladding head moves a specific distance along the cross-sectional direction, which increases the defocusing amount and expands the coverage of the light spot, ensuring that the newly added powder can be fully clad. Meanwhile, during the entire cladding process, the CCD camera module 7 will monitor the morphology of the molten pool and the cross-sectional contour in real time. Once an abnormality is detected, the nozzle opening size will be precisely adjusted immediately to ultimately achieve the forming of parts with different wall thicknesses.

[0057] like Figure 9 As shown, when forming inverted suspended parts, taking substrate 6 as a reference, the cross-sectional area of ​​the parts decreases from the top to the bottom. Therefore, the amount of powder fed out and the size of the laser spot must also be changed accordingly. The specific manufacturing process is as follows:

[0058] First, the control center transmits a signal to the pressure relief module 5. After receiving the signal, the pressure relief module 5 reduces the gas pressure inside the gas chamber 32 to ensure that the nozzle opening is enlarged, thereby increasing the amount of powder output. At the same time, the cladding head moves a specific distance along the cross-sectional direction, which increases the defocusing amount and expands the coverage of the light spot to ensure that the newly added amount of powder can be fully clad. Meanwhile, during the entire cladding process, the CCD camera module 7 monitors the morphology and cross-sectional contour of the molten pool in real time. Once an abnormality is detected, the size of the nozzle opening is immediately and precisely adjusted.

[0059] II. With the change of cladding, signals are transmitted from the control center to the gas cylinder 4, and the gas cylinder 4 increases the gas pressure in the gas cavity 32 after receiving the signals, which promotes the nozzle opening to decrease and reduces the powder output; at the same time, the cladding head moves a certain distance along the cross-sectional direction, which causes the defocus amount to decrease and the light spot range to decrease, so as to ensure that the light spot size matches the powder output, and the cladding effect is precisely controllable; at the same time, the CCD camera module 7 monitors the molten pool morphology and cross-sectional profile in real time, and once an abnormality is found, the nozzle opening size is precisely adjusted immediately.

[0060] III. Finally, according to the signals transmitted from the control center to the pressure relief module 5, the pressure relief module 5 reduces the gas pressure in the gas cavity 32 after receiving the signals, so as to ensure that the nozzle opening is enlarged and the powder output is increased; at the same time, the cladding head moves a certain distance along the cross-sectional direction, which causes the defocus amount to increase and the light spot coverage range to increase, so as to ensure that the newly added powder can be fully cladded; at the same time, during the whole cladding process, the CCD camera module 7 monitors the molten pool morphology and cross-sectional profile in real time, and once an abnormality is found, the nozzle opening size is precisely adjusted immediately, so as to finally achieve the forming of the parts with different wall thicknesses.

[0061] In summary, the present scheme cooperates the adjustable nozzle module 3, the gas cylinder 4 and the pressure relief module 5, so that the adjustable nozzle module 3 can adjust the nozzle size in real time according to the requirements of part forming, thereby realizing the green repair of different cross-sectional size forming parts, and ensuring that the forming process is simple and fast; at the same time, the present scheme can also adjust the powder flow shape size and the light spot size according to the working condition requirements of laser cladding green repair or laser 3D printing forming, so as to ensure that the powder flow size and the light spot energy size are adaptively adjusted until the working condition requirements are met, thereby improving the forming quality and efficiency, and at the same time meeting the functional diversity requirements. Embodiment Two

[0062] In combination Figures 1-10 with the above, the utility model provides a kind of control method of space three-dimensional green repair forming metal remanufacturing of light material coaxial arrangement, comprising the following steps:

[0063] Step one, according to powder conveying pipe 2, powder is conveyed from powder storage tank to adjustable nozzle module 3;

[0064] Step two, utilize collimator mechanism 15 to emit laser beam, and make laser beam pass through after split mirror mechanism 16 and reflection focusing mirror mechanism 17 pass through reflective light path through-hole 18 to project to the below of adjustable nozzle module 3 to form envelope light spot;

[0065] Step three, according to pre-set program or pre-set cross-sectional profile size image control gas cavity 32 internal gas pressure reduces or increases, while and according to movement arm 19 drive laser cladding head 1 realizes envelope light spot coverage range size adjustable, ensure that envelope light spot size matches powder output;

[0066] Step four, by increasing the gas pressure inside the air cavity 32, to achieve the nozzle opening shrinkage, reduce the powder output, vice versa, by reducing the gas pressure inside the air cavity 32, to achieve the nozzle opening expansion, increase the powder output, so as to ensure that the scheme of powder hole diameter adjustment is simple and fast, which can promote the printing of more complex parts and meet the demand of various working conditions.

[0067] In combination Figure 4 As further shown, in step three, the control center transmits real-time signal instructions according to the preset program, so that the gas cylinder 4 can send high-pressure gas to the air cavity 32 of the nozzle pipe 31 through the first gas pipe 9 after receiving the gas supply instruction, so that the air cavity 32 inside is compressed to realize the nozzle opening shrinkage and reduce the powder output. At the same time, the control center can also send the exhaust instruction to the pressure relief module 5 according to the preset program, so that the pressure relief module 5 can discharge the gas in the air cavity 32 through the second gas pipe 10 after receiving the exhaust instruction, so as to realize the nozzle opening expansion and increase the powder output due to the decrease of the gas pressure in the air cavity 32. During this period, the CCD camera module 7 is used to monitor the molten pool morphology and cross-sectional profile in real time, and compare the real-time image collected with the preset cross-sectional size image;

[0068] When the cross section is too large, the CCD camera module 7 can send a gas supply instruction to the gas cylinder 4 through the signal transmitter, so that the gas cylinder 4 can send gas to the air cavity 32 after receiving the gas supply instruction, so that the high-pressure gas extrudes the nozzle pipe 31 of the soft memory material inward to realize the nozzle opening shrinkage;

[0069] Conversely, when the cross section is too small, the CCD camera module 7 can send an exhaust instruction to the pressure relief module 5 through the signal transmitter, so that the pressure relief module 5 can discharge the gas in the air cavity 32 after receiving the exhaust instruction, so as to make the nozzle pipe 31 of the soft memory material recover outward to realize the nozzle opening expansion;

[0070] Therefore, the present scheme can meet the use demand of different working conditions by controlling the nozzle opening shrinkage or expansion through the control center and simultaneously adjusting the nozzle opening size in time through the CCD camera module 7, so as to ensure the forming work of complex parts and the precision of the formed workpiece.

[0071] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made therein without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A spatial three-dimensional green repair forming metal remanufacturing system with coaxial arrangement of light materials, characterized in that, The laser cladding nozzle (1) includes a laser cladding nozzle (1), a adjustable nozzle module (3) connected to one end of the powder conveying pipe (2) in the laser cladding nozzle (1), a gas cylinder (4) for conveying gas into the adjustable nozzle module (3), a pressure relief module (5) for discharging gas in the adjustable nozzle module (3), and a CCD camera module (7) for monitoring the state of the molten pool on the substrate (6). The monitoring area of the CCD camera module (7) corresponds to the outlet end of the adjustable nozzle module (3). The laser beam generated by the laser cladding nozzle (1) is coaxially arranged with the adjustable nozzle module (3) and is used to wrap the adjustable nozzle module (3). The adjustable nozzle module (3) reduces the nozzle opening by inputting gas, and increases the nozzle opening by discharging gas.

2. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 1, characterized in that, The adjustable nozzle module (3) includes a nozzle pipe (31) connected to one end of the powder conveying pipe (2), a gas cavity (32) opened in the nozzle pipe (31), and a gas inlet (33) and a gas outlet (34) opened on the surface of the nozzle pipe (31) and communicated with the gas cavity (32). The gas inlet (33) is used for gas input, and the gas outlet (34) is used for gas discharge.

3. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 2, characterized in that, The nozzle pipe (31) is made of soft memory material.

4. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 2, characterized in that, The adjustable nozzle module (3) further comprises a sealed and heat insulated shell (8) arranged on the outer wall of the nozzle pipe (31), and the inner wall of the sealed and heat insulated shell (8) is matched with the outer wall of the nozzle pipe (31).

5. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 2, characterized in that, The longitudinal section of the gas cavity (32) is annular.

6. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 2, characterized in that, The inner side of the gas inlet (33) is connected with a first gas pipe (9), one end of the first gas pipe (9) away from the gas inlet (33) is connected with the gas cylinder (4), and the inner side of the gas outlet (34) is connected with a second gas pipe (10), one end of the second gas pipe (10) away from the gas outlet (34) is connected with the pressure relief module (5).

7. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 1, characterized in that, The laser cladding nozzle (1) includes a connecting plate (11), an upper cover (12) mounted on the connecting plate (11), a support frame (13) connected to the bottom of the upper cover (12), a wire feeding pipe support (14) connected to the support frame (13), and a collimator mechanism (15) mounted on the top of the upper cover (12). A beamsplitter mechanism (16) and a plurality of reflecting focusing mirror mechanisms (17) are mounted on the top of the support frame (13). A plurality of reflecting light path through holes (18) corresponding to the reflecting focusing mirror mechanisms (17) are arranged on the support frame (13).

8. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 7, characterized in that, The laser beam emitted from the collimator mechanism (15) passes through the beamsplitter mechanism (16) and the reflecting focusing mirror mechanisms (17) and is projected from the reflecting light path through holes (18) to realize the wrapping of the adjustable nozzle module (3).

9. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 1, characterized in that, The CCD camera module (7) comprises a camera and a signal transmitter, and is electrically connected with the control modules of the gas cylinder (4) and the pressure relief module (5) respectively, and is used for controlling the gas transmission of the gas cylinder (4) and the pressure relief of the pressure relief module (5).

10. The spatial cubic green reformation metal remanufacturing system with coaxial arrangement of light and material according to claim 1, characterized in that, Further comprising a control center and a motion arm (19), the control center is electrically connected with the control modules of the gas cylinder (4) and the pressure relief module (5) respectively, and is used for controlling the gas transmission of the gas cylinder (4) and the pressure relief of the pressure relief module (5), and the motion arm (19) is used for driving the laser cladding nozzle (1) to move.

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