Laser cladding repair center

Abstract

The utility model provides a kind of laser cladding repair center, comprising: double column gantry machining center and repair center control system;Double column gantry machining center, including repair platform, positioning clamping mechanism, milling mechanism, cladding mechanism;Repair platform is used to carry and drive positioning clamping mechanism to move, positioning clamping mechanism is used to card to be repaired piece, milling mechanism is used to carry out the automated milling of internal defect of to be repaired piece, cladding mechanism can perform laser cladding repair;Repair center control system is configured to be able to receive the three-dimensional space information of internal defect of to be repaired piece, constructs the three-dimensional digitized model of to be repaired piece including the defect;It can be based on the three-dimensional digitized model control milling mechanism and form standard repair groove by milling the area including the defect;And it can be based on the geometric information of standard repair groove control cladding mechanism and perform cladding repair.The utility model uses laser cladding repair, reduces thermal stress and organizational inhomogeneity.

Description

Technical Field

[0001] This utility model relates to the field of laser cladding repair technology, specifically, to a laser cladding repair center. More particularly, it relates to a digital laser cladding repair center for aerospace titanium alloy castings. Background Technology

[0002] During the production of titanium alloy castings, internal defects such as porosity, cracks, and slag inclusions often occur. If these defects are not repaired in time before use, they will seriously affect the use process and may even cause incalculable loss of life and property.

[0003] Currently, internal inspection of castings mainly relies on X-ray inspection technology. While this method can detect defects, it only provides two-dimensional planar coordinates and lacks crucial depth information, making it impossible to accurately determine the spatial location and three-dimensional morphology of defects within the casting. In the defect handling stage, based on the blurry two-dimensional images, defects are typically removed manually by grinding. This process is highly dependent on the operator's experience and is prone to problems such as inaccurate positioning, excessive removal of base material, or incomplete defect removal, resulting in low repair efficiency and poor consistency.

[0004] Existing arc repair technology has drawbacks such as large heat input and wide heat-affected zone. It is not only easy to introduce new thermal stress and microstructure inhomogeneity, but also difficult to accurately match complex defect morphology. As a result, the strength, fatigue life, corrosion resistance and other properties of the repaired area are often lower than those of the base material, or fail to meet the design requirements, resulting in unstable repair quality and low reliability.

[0005] Patent document CN110952092A discloses an integrated small laser cladding device, including a platform, a laser cladding head motion mechanism, and a workpiece fixing mechanism. The lower part of the platform is fixed on a platform support. The laser cladding head motion mechanism includes a gantry frame, a crossbeam module, a lifting module, a front-to-back moving module, and a laser cladding head. The front-to-back moving module is installed on both sides of the platform. The bottom of the gantry frame is connected to the movable ends of the front-to-back moving modules. The crossbeam module is installed on the upper part of the gantry frame and is used to drive the lifting module to move left and right. The lifting module is installed on the movable end of the crossbeam module, and the laser cladding head is installed on the movable end of the lifting module. This device eliminates complex auxiliary structures, rationally arranges the air and water channels, and uses a low-power semiconductor fiber-coupled laser, significantly reducing manufacturing costs and simplifying operation and maintenance.

[0006] However, the electronic control system 11 in patent document CN110952092A cannot be configured like the repair center control system 9 of this utility model to: receive three-dimensional spatial information of internal defects in the part to be repaired, construct a three-dimensional digital model of the part to be repaired containing the defects; control the milling mechanism 1 to mill the area containing the defects to form a standard repair groove based on the three-dimensional digital model; and control the cladding mechanism 2 to perform cladding repair based on the geometric information of the standard repair groove. Therefore, it has the following disadvantages: it cannot achieve accurate three-dimensional positioning and digital modeling of defects, relies on manual judgment of the defect location and range, resulting in inaccurate defect excavation and removal. Utility Model Content

[0007] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a laser cladding repair center.

[0008] According to the present invention, a laser cladding repair center includes: a double-column gantry machining center;

[0009] The double-column gantry machining center includes: a repair platform 4, a positioning and clamping mechanism, a milling mechanism 1, a cladding mechanism 2, a column 6, a cast iron bed 5, and a crossbeam assembly 7;

[0010] The repair platform 4 is slidably connected to the top of the cast iron bed 5 and can move on the horizontal plane;

[0011] The column 6 is fixedly connected to the cast iron bed 5 and is set perpendicular to the repair platform 4. The crossbeam component 7 is set at the top of the column 6, higher than and parallel to the repair platform 4. The milling mechanism 1 and the cladding mechanism 2 are both slidably connected to the crossbeam component 7 and can move along the crossbeam component 7.

[0012] The positioning and clamping mechanism is set on the mounting plane at the top of the repair platform 4 to fix the part to be repaired. The milling mechanism 1 is used to automatically mill the internal defects of the part to be repaired. The cladding mechanism 2 is used to perform laser cladding repair on the repair groove processed by the milling mechanism 1.

[0013] Preferably, it also includes: a repair center control system 9;

[0014] The repair center control system 9 is configured to receive three-dimensional spatial information of internal defects in the part to be repaired and construct a three-dimensional digital model of the part to be repaired containing the defects.

[0015] The milling mechanism 1 can be controlled based on the three-dimensional digital model to mill the area containing the defect to form a standard repair groove; and

[0016] The cladding mechanism 2 can be controlled to perform cladding repair based on the geometric information of the standard repair groove.

[0017] Preferably, the milling mechanism 1 includes: a milling spindle 15, a milling cutter 16, a milling spindle motor 11, a first slide table 17, and a first Y-axis slide seat 14;

[0018] The crossbeam component 7 includes: a crossbeam motor 71 and a crossbeam body 73;

[0019] The first Y-axis sliding seat 14 is slidably connected to the crossbeam body 73. A crossbeam motor 71 and a transmission device are fixedly installed on the crossbeam body 73 to drive the first Y-axis sliding seat 14 to move along the crossbeam body 73.

[0020] The first slide 17 is slidably connected to the first Y-axis slide seat 14. The first Y-axis slide seat 14 is provided with a first servo motor 12. The first slide 17 can move under the drive of the first servo motor 12. The direction of movement is perpendicular to the mounting plane of the repair platform 4.

[0021] The milling spindle motor 11 is fixedly mounted on the first slide 17, and the milling spindle 15 is rotatably connected to the first slide 17. The milling spindle motor 11 drives the milling spindle 15 to rotate through the reduction gearbox 13, and the end of the milling spindle 15 is fixedly connected to the milling cutter 16.

[0022] Preferably, the cladding mechanism 2 includes: a laser cladding head 24, a cladding spindle 23, a cladding spindle motor 21, a second slide table 25, and a second Y-axis slide seat 26;

[0023] The second Y-axis sliding seat 26 is slidably connected to the crossbeam body 73 and can move along the crossbeam body 73 under the drive of the crossbeam motor 71;

[0024] The second slide 25 is slidably connected to the second Y-axis slide seat 26. The second Y-axis slide seat 26 is equipped with a second servo motor. The second slide 25 can move under the drive of the second servo motor. The direction of movement is perpendicular to the mounting plane of the repair platform 4.

[0025] The cladding spindle motor 21 is fixedly mounted on the second slide 25, the cladding spindle 23 is rotatably connected to the second slide 25, the cladding spindle motor 21 is connected to the cladding spindle 23 through the reducer 22, and the end of the cladding spindle 23 is fixedly connected to the laser cladding head 24.

[0026] Preferably, the positioning and clamping mechanism is a C-axis mechanism 8;

[0027] C-axis mechanism 8 includes: pin tailstock 3, tripod chuck 81 and drive motor 82;

[0028] The ejector pin tailstock 3 cooperates with the tripod chuck 81 to axially mount the workpiece to be repaired, and the drive motor 82 can drive the tripod chuck 81 to rotate the workpiece to be repaired.

[0029] Preferably, the repair center control system 9 includes: an intelligent processing system 92 and an adaptive laser cladding repair system 93;

[0030] The intelligent machining system 92 constructs the three-dimensional digital model based on point cloud data and generates milling trajectories;

[0031] The adaptive laser cladding repair system 93 matches the laser cladding process parameters based on the geometric dimensions of the standard repair groove.

[0032] Preferably, the cast iron bed 5 has an X-axis lead screw 53 and a hard rail 52 on its bed 51, both extending in the same direction;

[0033] The motor is connected to the end of the X-axis lead screw 53, and the lead screw nut screwed to the X-axis lead screw 53 is fixedly connected to the repair platform 4;

[0034] The motor drives the X-axis lead screw 53 to rotate, thereby moving the repair platform 4.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. This utility model addresses the problem of high heat input in traditional electric arc repair technology by using laser cladding repair, which reduces thermal stress and tissue inhomogeneity, reduces stress deformation, improves process stability, reduces repair allowance, and reduces reliance on manual experience.

[0037] 2. This utility model addresses the problem that traditional X-ray inspection cannot obtain three-dimensional information about defects. It uses industrial CT to achieve precise three-dimensional positioning and digital modeling of defects, thus solving the problem of "inaccurate location".

[0038] 3. This utility model addresses the problems of inaccurate defect positioning and low efficiency in manual grinding and excavation by utilizing an automated milling system to accurately excavate and excavate based on defect spatial information, forming a standard repair groove and solving the problem of "incomplete excavation". Attached Figure Description

[0039] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0040] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0041] Figure 2 This is a schematic perspective view of the milling mechanism according to an embodiment of the present utility model;

[0042] Figure 3 This is a schematic perspective view of the cladding mechanism according to an embodiment of the present utility model;

[0043] Figure 4This is a schematic perspective view of the cast iron bed according to an embodiment of the present utility model;

[0044] Figure 5 This is a schematic perspective view of the C-axis mechanism according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic structural diagram of the repair center control system according to an embodiment of the present invention;

[0046] Figure 7 This is a schematic perspective view of the crossbeam component according to an embodiment of the present utility model.

[0047] Figure label:

[0048] Detailed Implementation

[0049] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0050] like Figure 1 As shown, a laser cladding repair center provided by this utility model includes a repair center control system 9, a double-column gantry machining center, and auxiliary components of the two.

[0051] The double-column gantry machining center includes a column 6, a repair platform 4, a C-axis mechanism 8, a cast iron bed 5, a milling mechanism 1, a cladding mechanism 2, and a crossbeam assembly 7. The crossbeam assembly 7 is mounted on the column 6 and is higher than the mounting plane at the top of the repair platform 4. The mounting plane is used to fix the part to be repaired.

[0052] The milling mechanism 1 includes a milling spindle 15, a feed system, a milling cutter 16, a milling spindle motor 11, a reduction gearbox 13, a first slide table 17, and a first Y-axis slide seat 14.

[0053] The milling spindle motor 11 is fixedly mounted on the first slide 17, and the milling spindle 15 is rotatably connected to the first slide 17. The milling spindle motor 11 is connected to the milling spindle 15 through the reduction gearbox 13. A milling cutter 16 is fixedly mounted on the milling spindle 15, and the milling spindle motor 11 is used to drive the milling cutter 16 to rotate.

[0054] The crossbeam component 7 includes a crossbeam motor 71, a crossbeam body 73, and a transmission device, which can be a crossbeam lead screw 72. The crossbeam body 73 extends along the Y direction. The crossbeam motor 71 and the transmission device are fixedly mounted on the crossbeam body 73 and are used to drive the first Y-axis sliding seat 14 to move along the crossbeam body 73.

[0055] The first Y-axis sliding seat 14 is slidably connected to the crossbeam body 73 of the crossbeam component 7 via the first guide component. The screw nut on the crossbeam screw 72 is fixedly connected to the first Y-axis sliding seat 14. The crossbeam motor 71 drives the crossbeam screw 72 to rotate, thereby causing the first Y-axis sliding seat 14 to slide along the crossbeam body 73. The sliding direction is parallel to the Y direction.

[0056] The first Y-axis sliding seat 14 is slidably connected to the first slide table 17 via the second guide component. The first servo motor 12 is fixedly mounted on the first Y-axis sliding seat 14 and connected to the first slide table 17 via a transmission device. The first servo motor 12 drives the first slide table 17 to slide relative to the first Y-axis sliding seat 14 in a direction parallel to the Z-axis. The Z-axis is perpendicular to the mounting plane at the top of the repair platform 4, and the mounting plane is used to fix the part to be repaired.

[0057] The guiding directions of the first guide component and the second guide component on the first Y-axis sliding seat 14 are perpendicular to each other, and both can be slide rails.

[0058] The repair platform 4 is used to support the part to be repaired and to drive the C-axis mechanism 8 to move along the X direction. A T-slot is provided on the mounting plane of the repair platform 4 for mounting the C-axis mechanism 8. The repair platform 4 is mounted on the bed 51 of the cast iron bed 5 via a hardened rail 52.

[0059] The cast iron bed 5 has an X-axis lead screw 53 and a rigid rail 52 on its bed 51, both extending in the X direction. A motor is also fixedly mounted on the bed 51, connected to the end of the X-axis lead screw 53. The repair platform 4 is slidably connected to the rigid rail 52. A lead screw nut, screwed to the X-axis lead screw 53, is fixedly connected to the repair platform 4. The motor drives the X-axis lead screw 53 to rotate, thereby moving the repair platform 4 in the X direction.

[0060] Both the X and Y directions are parallel to the mounting plane of the repair platform 4, and the Y direction is perpendicular to the X direction.

[0061] The cladding mechanism 2 includes a laser cladding head 24, a powder feeder, a cladding laser, a water chiller, a cladding spindle motor 21, a reducer 22, a cladding spindle 23, a second slide table 25, a second Y-axis slide seat 26, and a second servo motor.

[0062] The cladding spindle motor 21 is fixedly mounted on the second slide 25, and the cladding spindle 23 is slidably connected to the second slide 25. The cladding spindle motor 21 is connected to the cladding spindle 23 through a reducer 22. A laser cladding head 24 is fixedly mounted at the end of the cladding spindle 23. The cladding spindle motor 21 can drive the cladding spindle 23 and the laser cladding head 24 to rotate.

[0063] The second Y-axis sliding seat 26 is slidably connected to the crossbeam body 73 of the crossbeam component 7 via the third guide component. The screw nut on the crossbeam screw 72 is fixedly connected to the second Y-axis sliding seat 26. The crossbeam motor 71 drives the crossbeam screw 72 to rotate, thereby causing the second Y-axis sliding seat 26 to slide along the crossbeam body 73 in a direction parallel to the Y-axis.

[0064] The second Y-axis sliding seat 26 is slidably connected to the second slide table 25 via the fourth guide component, and the second servo motor is fixedly mounted on the second Y-axis sliding seat 26. The second slide table 25 is connected to the second servo motor via a transmission device, and the second servo motor is used to drive the second slide table 25 to slide relative to the second Y-axis sliding seat 26 in a sliding direction parallel to the Z-axis.

[0065] The guiding directions of the third and fourth guide components on the second Y-axis sliding seat 26 are perpendicular to each other, and both can be slide rails.

[0066] The laser cladding head 24 and the cladding spindle 23 are fixed in the axial direction and move rapidly and accurately along the Z direction with the second slide table 25 under the drive of the second servo motor, ensuring repair efficiency.

[0067] The C-axis mechanism 8 includes a tailstock 3, a tripod chuck 81, a drive motor 82, and a base 83. The tailstock 3 cooperates with the tripod chuck 81 to axially clamp the workpiece to be repaired, and the drive motor 82 can drive the tripod chuck 81 to rotate the workpiece to be repaired.

[0068] The repair center control system 9 includes an intelligent machining system 92 and an adaptive laser cladding repair system 93. The intelligent machining system 92 constructs a three-dimensional digital model based on point cloud data and generates milling trajectories; the adaptive laser cladding repair system 93 matches the laser cladding process parameters based on the geometric dimensions of the standard repair groove. The intelligent machining system 92 and the laser cladding repair system 93 together constitute the system assembly 91.

[0069] According to the laser cladding repair method provided by this utility model, using the aforementioned digital laser cladding repair unit suitable for titanium alloy castings, the method includes the following steps:

[0070] To address the pain points in the repair process of titanium alloys mentioned above, this project conducts research on laser cladding repair technology for cast titanium alloys.

[0071] S1: The part to be repaired is clamped using quick tooling, and then the part to be repaired is inspected by industrial CT to identify the spatial information of the internal defects of the part to be repaired. The spatial information includes the three-dimensional coordinates of the size, shape and distribution location of the internal defects. The part to be repaired is a casting.

[0072] S2: Import the CT detection results into the repair center control system 9, construct a three-dimensional digital model containing the internal defect space information of the part to be repaired obtained in S1 through the intelligent processing system 92, and convert the digital model into model data information that can be read by the dual-column gantry processing center of the digital laser cladding center of this utility model.

[0073] S3: The part to be repaired is clamped on the repair platform 4. For block-shaped parts to be repaired, a tooling that matches the shape is used to clamp them directly on the repair platform 4. For cylindrical or cylindrical parts to be repaired, a tripod chuck 81 and a pin tail seat 3 are used for clamping to achieve precise clamping, so that the tripod chuck 81 can drive the part to be repaired to complete the rotation.

[0074] S4: Based on the spatial information of the internal defects of the part to be repaired identified by S1 and S2, the intelligent machining system 92 processes the standard repair groove by controlling the milling mechanism 1.

[0075] When machining standard repair grooves, the double-column gantry machining center operates as follows: It controls the first servo motor 12 to move the first slide table 17 along the Z-axis; it controls the crossbeam motor 71 to move the first Y-axis sliding seat 14 along the crossbeam body 73 of the crossbeam component 7, with the movement direction being Y; and it controls the milling spindle motor 11 to drive the milling cutter 16 to perform milling operations. This forms a standard repair groove that meets the repair requirements, achieving precise, controllable, and efficient defect removal.

[0076] S5: Based on the geometry of the standard repair groove, the movement of the cladding mechanism 2 is controlled by the laser cladding repair system 93. The laser cladding repair process parameters are set according to the pre-embedded laser cladding database to complete the repair of the part to be repaired, which can be a titanium alloy casting.

[0077] S6: X-ray inspection of the repaired parts to verify the repair quality.

[0078] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0079] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A laser cladding repair center, characterized in that, include: Double-column gantry machining center; The double-column gantry machining center includes: a repair platform (4), a positioning and clamping mechanism, a milling mechanism (1), a cladding mechanism (2), a column (6), a cast iron bed (5), and a crossbeam assembly (7). The repair platform (4) is slidably connected to the top of the cast iron bed (5) and can move on the horizontal plane; The column (6) is fixedly connected to the cast iron bed (5) and is set perpendicular to the repair platform (4); The crossbeam component (7) is located at the top of the column (6), higher than and parallel to the repair platform (4); Both the milling mechanism (1) and the cladding mechanism (2) are slidably connected to the crossbeam component (7) and can move along the crossbeam component (7); The positioning and clamping mechanism is set on the mounting plane at the top of the repair platform (4) to fix the part to be repaired. The milling mechanism (1) is used to mill the internal defects of the part to be repaired. The cladding mechanism (2) is used to perform laser cladding repair on the repair groove processed by the milling mechanism (1).

2. The laser cladding repair center according to claim 1, characterized in that, Also includes: Repair center control system (9); The repair center control system (9) is configured to receive three-dimensional spatial information of internal defects in the part to be repaired and construct a three-dimensional digital model of the part to be repaired containing the defects. The milling mechanism (1) can be controlled based on the three-dimensional digital model to mill the area containing the defect to form a standard repair groove; and The cladding mechanism (2) can be controlled based on the geometric information of the standard repair groove to perform cladding repair.

3. The laser cladding repair center according to claim 2, characterized in that, The milling mechanism (1) includes: a milling spindle (15), a milling cutter (16), a milling spindle motor (11), a first slide (17), and a first Y-axis slide (14). The crossbeam component (7) includes: a crossbeam motor (71) and a crossbeam body (73); The first Y-axis sliding seat (14) is slidably connected to the crossbeam body (73). A crossbeam motor (71) and a transmission device are fixedly installed on the crossbeam body (73) to drive the first Y-axis sliding seat (14) to move along the crossbeam body (73). The first slide (17) is slidably connected to the first Y-axis slide (14). The first Y-axis slide (14) is provided with a first servo motor (12). The first slide (17) can move under the drive of the first servo motor (12). The direction of movement is perpendicular to the mounting plane of the repair platform (4). The milling spindle motor (11) is fixedly mounted on the first slide (17), and the milling spindle (15) is rotatably connected to the first slide (17). The milling spindle motor (11) drives the milling spindle (15) to rotate through the reduction gearbox (13), and the end of the milling spindle (15) is fixedly connected to the milling cutter (16).

4. The laser cladding repair center according to claim 3, characterized in that, The cladding mechanism (2) includes: a laser cladding head (24), a cladding spindle (23), a cladding spindle motor (21), a second slide (25), and a second Y-axis slide (26); The second Y-axis sliding seat (26) is slidably connected to the crossbeam body (73) and can move along the crossbeam body (73) under the drive of the crossbeam motor (71); The second slide (25) is slidably connected to the second Y-axis slide (26). The second Y-axis slide (26) is equipped with a second servo motor. The second slide (25) can move under the drive of the second servo motor. The direction of movement is perpendicular to the mounting plane of the repair platform (4). The cladding spindle motor (21) is fixedly mounted on the second slide (25), the cladding spindle (23) is rotatably connected to the second slide (25), the cladding spindle motor (21) is connected to the cladding spindle (23) through the reducer (22), and the end of the cladding spindle (23) is fixedly connected to the laser cladding head (24).

5. The laser cladding repair center according to claim 1, characterized in that, The positioning and clamping mechanism is a C-axis mechanism (8); The C-axis mechanism (8) includes: a tailstock (3), a tripod chuck (81), and a drive motor (82). The ejector pin tailstock (3) cooperates with the tripod chuck (81) to axially mount the workpiece to be repaired, and the drive motor (82) can drive the tripod chuck (81) to rotate the workpiece to be repaired.

6. The laser cladding repair center according to claim 2, characterized in that, The repair center control system (9) includes: an intelligent processing system (92) and an adaptive laser cladding repair system (93). The intelligent machining system (92) constructs the three-dimensional digital model based on point cloud data and generates milling trajectories; The adaptive laser cladding repair system (93) matches the laser cladding process parameters based on the geometry of the standard repair groove.

7. The laser cladding repair center according to claim 2, characterized in that, The cast iron bed (5) has an X-axis lead screw (53) and a hard rail (52) on its bed (51), both of which extend in the same direction; The motor is connected to the end of the X-axis lead screw (53), and the lead screw nut screwed to the X-axis lead screw (53) is fixedly connected to the repair platform (4). The motor drives the X-axis lead screw (53) to rotate, thereby moving the repair platform (4).

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