A laser cladding remanufacturing apparatus and method based on multi-angle precise temperature control

Abstract

This invention discloses a laser cladding remanufacturing device based on multi-angle precise temperature control. It includes a cladding device, filling powder, two temperature control units, a control cabinet, a robotic arm, and a computer. The temperature control units include a parallel resistance wire and an infrared thermometer. Simultaneously, this invention discloses a laser cladding remanufacturing method based on multi-angle precise temperature control, comprising the following steps: 1. Preheating before laser cladding: I. Preliminary preheating; II. Determining the preheating range; III. Formal preheating; 2. Laser cladding: The cladding device continues repair until the repair work is completed; 3. Post-laser cladding insulation: After laser cladding, the repaired area is insulated. This invention reduces the temperature difference during the laser cladding process by preheating, measuring, and insulating the area surrounding the defect, thereby reducing residual stress and ensuring the quality of the cladding, thus enabling rapid in-situ repair of weapons and equipment under battlefield conditions.

Description

Technical Field

[0001] This invention relates to the field of laser cladding remanufacturing technology, and in particular to a laser cladding remanufacturing method and apparatus based on multi-angle precise temperature control. Background Technology

[0002] In battlefield conditions, rapid in-situ repair of weaponry and equipment is a major challenge in the field of remanufacturing, with laser cladding remanufacturing technology being a crucial component. During the repair process, the temperature of the laser-clad area rises significantly due to a metallurgical reaction, while the surrounding temperature remains low, resulting in substantial residual stress. Therefore, there is an urgent need to develop a device to address the problem of excessive residual stress during the repair process. Summary of the Invention

[0003] The problem to be solved by the present invention is to provide a laser cladding remanufacturing method and apparatus based on multi-angle precise temperature control. By preheating, measuring and keeping the temperature of the area around the defect, the temperature difference during the laser cladding process is reduced, thereby reducing residual stress and ensuring the quality of cladding, so as to enable rapid in-situ repair of weapons and equipment under battlefield conditions.

[0004] This invention discloses a laser cladding remanufacturing device based on multi-angle precise temperature control. It includes a cladding device, filling powder, two temperature control units, a control cabinet, a robotic arm, and a computer. The temperature control units include a resistance wire and an infrared thermometer connected in parallel. The cladding device is placed above the damaged part and contains filling powder inside. The two temperature control units are symmetrically arranged on both sides of the cladding device. The robotic arm holds the upper part of the cladding device and the two temperature control units. The computer is electrically connected to the control cabinet, and the control cabinet is electrically connected to the robotic arm.

[0005] Furthermore, the cladding device performs laser cladding on the damaged part by filling powder; the resistance wire is used to preheat and keep the surrounding area of ​​the defect in the damaged part warm; the infrared thermometer is used to monitor the temperature of the resistance wire and the heating area in real time, and promptly feeds the data back to the computer through the robotic arm and control cabinet to generate a temperature distribution curve; the computer adjusts the parameters of the control cabinet according to the signal fed back by the infrared thermometer, and the control cabinet controls the movement of the robotic arm to execute commands for path planning and temperature control at different positions.

[0006] Furthermore, before the cladding process, the resistance wire preheats the area around the defect in the damaged part to increase the surface temperature of the workpiece and reduce residual stress. After the cladding process is completed, the resistance wire acts as a heat preservation device to increase the temperature of the working area and prevent the defect from cooling too quickly and generating residual stress.

[0007] The present invention discloses a laser cladding remanufacturing method based on multi-angle precise temperature control, which includes the following steps: 1. preheating before laser cladding; 2. laser cladding; 3. heat preservation after laser cladding.

[0008] Further, the specific steps are as follows: 1. Preheating before laser cladding: I. Pre-heating: II. Determining the preheating range: III. Formal preheating; 2. Laser cladding: The cladding device continues to repair until the repair work is completed; 3. Heat preservation after laser cladding: After the laser cladding is completed, the repaired area is heat-preserved.

[0009] Further, the preheating before laser cladding in step one is as follows: Ⅰ. Preheating: The robotic arm controls the resistance wire to preheat the defective area of ​​the damaged part according to the cladding range, and the infrared thermometer is turned on; simultaneously, the robotic arm controls the cladding device to be raised to a suitable height above the damaged part, and the cladding device gradually adds filler powder into the damaged part to perform a trial laser cladding operation. When two layers are clad, the cladding device stops working; Ⅱ. Determining the preheating range: The infrared thermometer monitors the temperature of the area surrounding the damaged part during the preheating process and transmits the measured temperature data to the computer to automatically plot a temperature distribution curve; the generated temperature distribution curve is observed to determine the temperature difference between the highest and lowest points. The values ​​and minimum temperature range are determined; a virtual repair model is constructed using a computer for simulation calculation to obtain the temperature distribution results after repair; the actual monitored values ​​are compared with the simulation parameter values ​​in the computer database, and the preheating range is planned after combining the simulation and actual verification parameters, with high-temperature preheating designed around the defect and low-temperature preheating designed far away from the defect; III. Formal preheating: the robotic arm is controlled to preheat the preheating range with the resistance wire, while the infrared thermometer monitors the temperature distribution to ensure that the temperature distribution range and values ​​within the set area meet the set requirements; after preheating, the process parameters are adjusted in time to prevent the temperature of the heating zone from being too high and to prevent the existence of unpreheated areas. When the temperature distribution meets the set requirements, the preheating ends.

[0010] Furthermore, in step two: during laser cladding, both the resistance wire and the infrared thermometer are working: once the heating temperature is reached, the resistance wire performs a heat preservation task; if the temperature is lower than required, the resistance wire needs to continue heating; the infrared thermometer continuously measures the temperature and feeds the temperature data back to the computer, thereby controlling the heat preservation or heating of the resistance wire.

[0011] Furthermore, in step three: after the laser cladding is completed, the resistance wire and infrared thermometer both stop working, and the residual heat from the heating of the resistance wire and the residual heat from the cladding are used for heat preservation and slow cooling.

[0012] Furthermore, during the insulation process, the insulation method can be set according to different repair materials, defect locations, cladding thickness, and paths.

[0013] The advantages of this invention are: (i) By preheating the resistance wire before cladding, the temperature around the area to be repaired of the damaged part is raised in advance. In this way, during the formal cladding process, there is basically no temperature difference between the laser cladding area and the repair area, thereby increasing the surface temperature of the workpiece and thus greatly reducing residual stress; (ii) By keeping the resistance wire warm after cladding, the cladding area can be cooled down slowly to prevent the defect from cooling too quickly and generating residual stress; (iii) The preheating before laser cladding is divided into three steps: preliminary preheating, determining the preheating range, and formal preheating. The preheating range is accurately planned: high-temperature preheating is designed around the defect, and low-temperature preheating is designed far from the defect. Reasonable heating is carried out within a reasonable preheating range, thereby reliably reducing residual stress; (iv) The infrared thermometer monitors the temperature and feeds it back to the computer, which can accurately control the temperature of the resistance wire and ensure the reduction of residual stress; (v) The temperature control unit can be adjusted relative to the cladding device, thereby realizing preheating at different temperatures in different places within the preheating range, which greatly reduces residual stress. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the laser cladding remanufacturing device based on multi-angle precise temperature control according to the present invention. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0016] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0018] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0019] Example 1

[0020] like Figure 1 As shown, the present invention discloses a laser cladding remanufacturing device based on multi-angle precise temperature control, which includes a cladding device 21, a filling powder 22, two temperature control units, a control cabinet 3, a robotic arm 4, and a computer 5. The temperature control units include a resistance wire 23 and an infrared thermometer 24 connected in parallel. The cladding device 21 is placed above the damaged part 1 and has filling powder 22 inside. The two temperature control units are symmetrically arranged on both sides of the cladding device 21. The robotic arm 4 holds the upper part of the cladding device 21 and the two temperature control units. The computer 5 is electrically connected to the control cabinet 3, and the control cabinet 3 is electrically connected to the robotic arm 4.

[0021] In the device of this invention: the cladding device 21 performs laser cladding on the damaged part 1 by filling powder 22; the resistance wire 23 is used to preheat and keep the surrounding area of ​​the defect in the damaged part 1 warm; the infrared thermometer 24 is used to monitor the temperature of the resistance wire 23 and the heating area in real time, and promptly feeds the data back to the computer 5 through the robotic arm 4 and the control cabinet 3 to generate a temperature distribution curve; the computer 5 adjusts the parameters of the control cabinet 3 according to the signal fed back by the infrared thermometer 24, and the control cabinet 3 controls the movement of the robotic arm 4 to execute commands for path planning and temperature control at different positions.

[0022] Before the cladding process, the resistance wire 23 preheats the area around the defect in the damaged part 1 to increase the surface temperature of the workpiece and reduce residual stress. After the cladding process is completed, the resistance wire 23 plays a heat preservation role to increase the temperature of the working area and prevent the defect from cooling too quickly and generating residual stress.

[0023] Example 2

[0024] The present invention discloses a laser cladding remanufacturing method based on multi-angle precise temperature control, which includes the following steps: 1. preheating before laser cladding; 2. laser cladding; 3. heat preservation after laser cladding.

[0025] Example 3

[0026] This invention discloses a laser cladding remanufacturing method based on multi-angle precise temperature control, the specific steps of which are as follows:

[0027] I. Preheating before laser cladding:

[0028] I. Preheating: The robotic arm 4 controls the resistance wire 23 to preheat the defect area of ​​the damaged part 1 according to the cladding range, and turns on the infrared thermometer 24; at the same time, the robotic arm 4 controls the cladding device 21 to be raised to a suitable height above the damaged part 1, and the cladding device 21 gradually adds filler powder 22 into the interior of the damaged part 1 to perform a laser cladding trial operation. When two layers are clad, the cladding device 21 stops working.

[0029] II. Determining the Preheating Range: Infrared thermometer 24 monitors the temperature of the area surrounding the damaged part 1 during the initial preheating process and transmits the measured temperature data to computer 5 to automatically plot a temperature distribution curve; observe the generated temperature distribution curve to determine the difference between the highest and lowest temperatures and the range of the lowest temperature; use computer 5 to construct a virtual repair model for simulation calculation to obtain the temperature distribution results after repair; compare the actual monitored values ​​with the simulation parameter values ​​in the database of computer 5, and plan the preheating range based on the parameters after combining simulation and actual verification, and design high-temperature preheating around the defect and low-temperature preheating away from the defect;

[0030] III. Formal Preheating: Control the robotic arm 4 to preheat the preheating area with the resistance wire 23, while the infrared thermometer 24 monitors the temperature distribution to ensure that the temperature distribution range and value within the set area meet the set requirements; after preheating, adjust the process parameters in time to prevent the heating zone temperature from being too high and to prevent the existence of unpreheated areas. When the temperature distribution meets the set requirements, the preheating ends.

[0031] II. Laser cladding: The cladding device 21 continues the repair work until it is completed;

[0032] III. Heat preservation after laser cladding: After the laser cladding is completed, the repaired area is heat-preserved.

[0033] Example 4

[0034] In step two of the method of the present invention: during laser cladding, both the resistance wire 23 and the infrared thermometer 24 are working: when the heating temperature is reached, the resistance wire 23 performs the task of heat preservation; if the temperature is lower than the requirement, the resistance wire 23 needs to continue heating; the infrared thermometer 24 continuously measures the temperature and feeds the temperature data back to the computer 5, thereby controlling the heat preservation or heating of the resistance wire 23.

[0035] Example 5

[0036] In step three of the method of the present invention: after the laser cladding is completed, the resistance wire 23 and the infrared thermometer 24 both stop working, and the residual heat left by the resistance wire 23 during heating and the residual heat of the cladding are used for heat preservation and slow cooling.

[0037] During the insulation process, the insulation method can be set according to different repair materials, defect locations, cladding thickness and path.

[0038] The advantages of this invention, a laser cladding remanufacturing device and method based on multi-angle precise temperature control, are as follows: (i) By preheating the resistance wire before cladding, the temperature around the area to be repaired of the damaged part is raised in advance. In this way, during the formal cladding process, there is basically no temperature difference between the laser cladding area and the area to be repaired, thereby increasing the surface temperature of the workpiece and thus greatly reducing residual stress; (ii) By keeping the resistance wire warm after cladding, the cladding area can be cooled slowly to prevent the defect from cooling too quickly and generating residual stress; (iii) The preheating before laser cladding is divided into three steps: preliminary preheating, determining the preheating range, and formal preheating. The preheating range is accurately planned: high-temperature preheating is designed around the defect, and low-temperature preheating is designed far from the defect. Reasonable heating is carried out within a reasonable preheating range, thereby reliably reducing residual stress; (iv) The infrared thermometer monitors the temperature and feeds it back to the computer, which can accurately control the temperature of the resistance wire and ensure the reduction of residual stress; (v) The temperature control unit can be adjusted relative to the cladding device, thereby realizing preheating at different temperatures in different places within the preheating range, which greatly reduces residual stress.

[0039] This invention prevents residual stress caused by temperature differences during laser cladding by preheating, measuring and maintaining the temperature of the area surrounding the defect, thereby ensuring the quality of the cladding and enabling rapid in-situ repair of weapons and equipment under battlefield conditions.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for remanufacturing based on a laser cladding remanufacturing apparatus with multi-angle precise temperature control, characterized in that: The remanufacturing apparatus includes a cladding device (21), filler powder (22), two temperature control units, a control cabinet (3), a robotic arm (4), and a computer (5). The temperature control units include a parallel resistance wire (23) and an infrared thermometer (24). The cladding device (21) is placed above the damaged part (1) and has filler powder (22) inside. The two temperature control units are symmetrically arranged on both sides of the cladding device (21). The robotic arm (4) holds the upper part of the cladding device (21) and the two temperature control units. The computer (5) is electrically connected to the control cabinet. (3), the control cabinet (3) is electrically connected to the robotic arm (4); including the following steps: I. Preheating before laser cladding: I. Pre-heating: II. Determining the preheating range: III. Formal preheating; II. Laser cladding: the cladding device continues to repair until the repair work is completed; III. Heat preservation after laser cladding: after the laser cladding is completed, the repair area is heat-preserved; among which, the preheating before laser cladding in step one is specifically as follows: I. Pre-heating: the robotic arm controls the resistance wire to preheat the defect area of ​​the damaged part according to the cladding range, and turns on the infrared thermometer; at the same time, the robotic arm controls the cladding device The laser cladding device is raised to a suitable height above the damaged part, and gradually adds filler powder into the interior of the damaged part to perform a trial operation. When two layers are clad, the cladding device stops working. II. Determine the preheating range: An infrared thermometer monitors the temperature of the area around the damaged part during the initial preheating process and transmits the measured temperature data to a computer to automatically plot a temperature distribution curve. Observe the generated temperature distribution curve to determine the difference between the highest and lowest temperatures and the range of the lowest temperature. Use a computer to build a virtual repair model for simulation calculation to obtain the temperature distribution results after repair. Compare the actual monitored values ​​with the simulation parameter values ​​in the computer database, and plan the preheating range based on the parameters after combining simulation and actual verification. Design high-temperature preheating around the defect and low-temperature preheating away from the defect. III. Formal preheating: Control the robotic arm to preheat the preheating range with a resistance wire, while the infrared thermometer monitors the temperature distribution to ensure that the temperature distribution range and values ​​within the set area meet the set requirements. After preheating, adjust the process parameters in a timely manner to prevent the heating zone temperature from being too high and to prevent the existence of unpreheated areas. When the temperature distribution meets the set requirements, the preheating ends.

2. The method according to claim 1, characterized in that: The cladding device (21) performs laser cladding on the damaged part (1) by filling powder (22); the resistance wire (23) is used to preheat and keep the surrounding area of ​​the defect of the damaged part (1); the infrared thermometer (24) is used to monitor the temperature of the resistance wire (23) and the heating area in real time, and promptly feeds the data back to the computer (5) through the robotic arm (4) and the control cabinet (3) to generate a temperature distribution curve; the computer (5) adjusts the parameters of the control cabinet (3) according to the signal fed back by the infrared thermometer (24), and the control cabinet (3) controls the movement of the robotic arm (4) to execute commands for path planning and temperature control at different positions.

3. The method according to claim 1, characterized in that: Before the cladding work, the resistance wire (23) preheats the area around the defect of the damaged part (1) to increase the surface temperature of the workpiece and reduce residual stress. After the cladding work is completed, the resistance wire (23) plays a role in heat preservation to increase the temperature of the working area and prevent the defect from cooling too quickly and generating residual stress.

4. The method according to claim 1, characterized in that: in step two: during laser cladding, both the resistance wire and the infrared thermometer are working; when the heating temperature is reached, the resistance wire performs a heat preservation task; if the temperature is lower than required, the resistance wire needs to continue heating; the infrared thermometer continuously measures the temperature and feeds the temperature data back to the computer, thereby controlling the heat preservation or heating of the resistance wire.

5. The method according to claim 1, characterized in that: in step three: after the laser cladding is completed, the resistance wire and the infrared thermometer both stop working, and the residual heat from the heating of the resistance wire and the residual heat from the cladding are used for heat preservation and slow cooling.

6. The method according to claim 1, characterized in that: During the insulation process, the insulation method can be set according to different repair materials, defect locations, cladding thickness and path.

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