A mold repair welding machine

Abstract

The utility model discloses a mould repair welding machine belongs to laser welding equipment technical field, including host computer, hoisting mechanism, double drive linkage workstation, automatic focusing welding mechanism, fiber laser, control system and infrared thermometer, the host computer inside installation has fiber laser and control system, its one side sets up double drive linkage workstation, and hoisting mechanism sets up in double drive linkage workstation other side, and hoisting mechanism is electrically connected with control system. Automatic focusing welding mechanism installs in the execution end of hoisting mechanism, and it is established above double drive linkage workstation, and it is connected with fiber laser light path, and it is also electrically connected with control system. Infrared thermometer sets up in automatic focusing welding mechanism, and infrared thermometer is electrically connected with control system. Solve the heat affected zone big, low precision and the operation complex problem of relying on the worker experience of mould repair welding in the prior art. Have the characteristics such as high precision, small heat affected zone and simple operation.

Description

Technical Field

[0001] This utility model relates to the field of laser welding equipment technology, specifically to a mold repair welding machine. Background Technology

[0002] In modern manufacturing, molds are core tools that determine product precision, quality, and production efficiency, and are widely used in the automotive, aerospace, and precision parts industries. However, molds inevitably develop defects such as wear and cracks during long-term use. These defects not only reduce product quality but also lead to production line downtime and mold scrapping, resulting in significant economic losses. Therefore, efficient and high-precision mold repair to extend their lifespan has become a crucial requirement in the manufacturing industry.

[0003] Currently, mold repair mainly relies on traditional processes such as manual arc welding and argon arc welding. These methods have significant limitations: First, the concentrated high heat input creates a large heat-affected zone, easily leading to thermal deformation of the mold and compromising its original precision. Second, welding quality is overly dependent on the operator's skill and experience, resulting in low precision and poor consistency, making it difficult to meet the repair requirements of precision molds. Finally, existing technologies have low automation levels, lacking real-time monitoring and control of key welding parameters (such as molten pool temperature and focal point position), hindering intelligent operation, and resulting in low efficiency and high costs.

[0004] Therefore, how to provide a mold repair welding machine to solve the defects in the existing structure is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, this utility model provides a mold repair welding machine to solve the problems of large welding heat-affected zone, easy mold deformation, low processing accuracy and complicated operation caused by inaccurate heat input control and lack of real-time monitoring and adaptive capabilities in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses a mold repair welding machine, comprising: The main unit contains a fiber laser and a control system. A dual-drive linkage workbench is located on one side of the host computer, and the dual-drive linkage workbench is electrically connected to the control system. A lifting mechanism is located on the side of the dual-drive linkage workbench away from the host machine, and the lifting mechanism is electrically connected to the control system. An automatic focusing welding mechanism is installed at the execution end of the hoisting mechanism. The automatic focusing welding mechanism is located above the dual-drive linkage worktable. The automatic focusing welding mechanism is connected to the optical path of the fiber laser and is also electrically connected to the control system. An infrared thermometer is mounted on the automatic focusing welding mechanism, and the infrared thermometer is electrically connected to the control system.

[0007] In one possible implementation, the dual-drive linkage worktable includes: A base is disposed on one side of the main unit, and a support platform is mounted on the top of the base; A first drive component is installed on top of the support platform; The second drive component is installed on top of the support platform; In the vertical direction, the first driving component and the second driving component are staggered; in the horizontal direction, the first driving component and the second driving component are parallel. The driven component is mounted at one end on the side wall of the first drive component, and the driven component is hinged to the side wall of the second drive component; The working platform is fixedly installed on top of the driven component.

[0008] In one possible implementation, the first driving component includes: The first slide rail is installed on the top outer wall of the support platform; The first motor is mounted on the side wall of the top of the support platform. The output end of the first motor is connected to the first lead screw, which is inserted into the first slide rail. The first slider is slidably connected to the first slide rail, and the first slider is threadedly engaged with the first lead screw.

[0009] In one possible implementation, the second driving component includes: The second slide rail is installed on the top outer wall of the support platform; The second motor is installed on the side wall of the top of the support platform. The output end of the second motor is connected to the second lead screw, which is inserted into the second slide rail. The second slider is slidably connected to the second slide rail, and the second slider is threadedly engaged with the second lead screw.

[0010] In one possible implementation, the driven component includes: The third slide rail is installed on the side wall of the first slider, and the third slider is slidably connected to the third slide rail. The working platform is fixedly connected to the top of the third slider. One end of the transmission rod is hinged to the side wall of the third slider, and the other end of the transmission rod is hinged to the side wall of the second slider.

[0011] In one possible implementation, the lifting mechanism includes: The crane body has a connection port that is connected to one end of a first guide tube, and the other end of the first guide tube is electrically connected to the control system. The boom is mounted on top of the crane body; A clamp is installed at the execution end of the boom, and the boom is connected to the automatic focusing welding mechanism via the clamp; A first display is hinged to the outer wall of the clamp, and the first display is electrically connected to the control system through the first conduit.

[0012] In one possible implementation, the automatic focusing welding mechanism includes: The outer wall of the housing is detachably connected to the clamp. The second conduit has one end inserted into the housing and the other end electrically connected to the control system. A focusing assembly is disposed within the housing, and the focusing assembly is electrically connected to the control system via the second conduit. A focusing lens assembly is disposed inside the housing and installed at the bottom of the focusing assembly. The optical axis of the focusing lens assembly is coaxial with the laser beam emitted by the fiber laser. A welding head is installed at the end of the housing, and the infrared thermometer is nested on the side wall of the welding head; The second display is hinged to the outer wall of the housing and is electrically connected to the control system.

[0013] In one possible implementation, the focusing component includes: A laser rangefinder sensor is installed inside the housing, and its ranging direction is parallel to the laser beam; A servo motor is mounted on the inner wall of the housing; The transmission mechanism is connected between the output shaft of the servo motor and the focusing lens group. Both the laser rangefinder and the servo motor are electrically connected to the control system.

[0014] In one possible implementation, a protective mechanism is further provided on the outside of the automatic focusing welding mechanism, the protective mechanism comprising: Gas storage tanks are installed in pairs, with the gas outlet connected to one end of the gas supply pipe; The jet nozzle has two independent jet channels. The two air inlets of the jet nozzle are connected to the other ends of the two air supply pipes. The jet directions of the jet nozzle converge at the laser focus.

[0015] This utility model has the following advantages: An automatic focusing system tracks the mold contour in real time and dynamically adjusts the laser focus to ensure consistent welding accuracy and penetration depth. The control system, combined with an infrared thermometer, controls the molten pool temperature, manages heat input, reduces the heat-affected zone, and suppresses mold deformation, making it suitable for mold repair. This invention simplifies parameter settings through a human-machine interface on a second display, reducing reliance on operator skill and standardizing the welding process. Simultaneously, the aforementioned mechanisms work in conjunction with a lifting mechanism and a dual-drive linkage worktable to achieve automated operation. A dual-path protective gas system protects the molten pool from oxidation. Ultimately, this achieves high-precision, low-deformation, and efficient mold repair.

[0016] The advantage of the dual-drive linkage worktable lies in its use of two sets of drive components that are vertically offset and horizontally parallel. Their movements are combined through driven components to ultimately drive the platform's working area. This design allows the worktable to synthesize complex linear movements along the X and Y axes and along diagonal lines at arbitrary angles in a plane through the coordinated control of two servo motors. In actual welding, this dual-drive linkage worktable can flexibly and quickly move any part of the mold to the optimal position below the welding head, and allows for fine-tuning during the welding process. This effectively meets the requirements of mold repair for multi-position operations, improving automation and production efficiency. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 A perspective view of a mold repair and welding machine provided by this utility model; Figure 2 A perspective view of the dual-drive linkage worktable provided by this utility model; Figure 3 A cross-sectional view of the dual-drive linkage worktable provided by this utility model; Figure 4 A top view of the dual-drive linkage worktable provided by this utility model; Figure 5 A perspective view of the lifting mechanism provided for this utility model; Figure 6 A perspective view of the automatic focusing welding mechanism provided by this utility model; In the diagram: 1 Main unit; 2 Lifting mechanism; 21 Lifting body; 22 Boom; 23 Clamp; 24 First display; 25 First conduit; 3 Dual-drive linkage worktable; 31 Base; 32 Support platform; 33 First drive assembly; 331 First motor; 332 First lead screw; 333 First slide rail; 334 First slider; 34 Second drive assembly; 341 Second motor; 342 Second lead screw; 343 Second slide rail; 344 Second slider; 35 Driven assembly; 351 Third slide rail; 352 Third slider; 353 Transmission rod; 36 Work platform; 4 Automatic focusing welding mechanism; 41 Housing; 42 Welding head; 43 Second conduit; 44 Air nozzle; 45 Gas pipe; 46 Gas tank; 47 Second display. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please refer to Figures 1-6 The present invention discloses a mold repair and welding machine, as follows: Figure 1The system includes a main unit 1, a lifting mechanism 2, a dual-drive linkage worktable 3, an automatic focusing welding mechanism 4, a fiber laser (not shown in the figure), a control system (not shown in the figure), and an infrared thermometer (not shown in the figure). The main unit 1 is equipped with a fiber laser and a control system. The dual-drive linkage worktable 3 is located on one side of the main unit 1 and is electrically connected to the control system. The lifting mechanism 2 is located on the side of the dual-drive linkage worktable 3 away from the main unit 1 and is electrically connected to the control system. The automatic focusing welding mechanism 4 is installed at the execution end of the lifting mechanism 2 and is located above the dual-drive linkage worktable 3. The automatic focusing welding mechanism 4 is connected to the optical path of the fiber laser and is also electrically connected to the control system. The infrared thermometer is located on the automatic focusing welding mechanism 4 and is electrically connected to the control system.

[0022] The usage process of this utility model embodiment is as follows: First, fix the mold to be repaired on the dual-drive linkage worktable 3, and adjust the positioning fixture according to the shape and size of the mold to ensure that the mold is stably clamped. Use the motion mechanism of the dual-drive linkage worktable 3 to adjust the mold to a suitable welding position and angle.

[0023] The operator selects the mold material through the human-machine interface on the second display 47. The control system automatically recommends initial welding parameters, including laser power, pulse frequency, and welding speed. The operator can adjust the parameters to optimize the welding effect based on the mold defects.

[0024] After the equipment is started, the laser rangefinder sensor detects the changes in the height of the mold surface in real time and transmits the data to the control system. After analyzing the data, the system calculates the adjustment amount and direction of the focusing lens group, and controls the focusing motor to drive the transmission mechanism, moving the lens group to achieve automatic focusing, so that the laser focus falls on the area to be welded.

[0025] After focusing is complete, the control system activates the fiber laser, outputting a laser beam according to the set parameters. Simultaneously, it controls the dual-drive linkage worktable to move along a preset path and delivers protective gas to the welding area via a gas protection mechanism, initiating the welding process. During welding, the laser rangefinder continuously monitors the surface height, and the control system adjusts the position of the focusing lens group in real time to ensure that the laser focus is always at the most suitable welding position.

[0026] Different welding modes and parameters can be selected for different mold defects. For example, shallow defects can be welded using a pulse welding mode with a lower power setting to reduce the heat-affected zone; while deep cracks or holes can be welded with a higher welding current and welding time to ensure that the welding material fully fills the defect.

[0027] After welding is completed, the control system shuts down the fiber laser, focusing motor, and protection mechanism, and stops the movement of the dual-drive linkage worktable. Once the mold has cooled to room temperature, the positioning fixture is removed, and the mold is taken down. The welded parts are then cleaned and inspected.

[0028] In summary, this invention enables high-precision, low-deformation welding repair work, reduces operational difficulty and worker labor intensity, and improves welding quality and production efficiency.

[0029] In a specific embodiment, such as Figure 2 The dual-drive linkage worktable 3 includes a base 31, a support platform 32, a first drive assembly 33, a second drive assembly 34, a driven assembly 35, and a work platform 36. The base 31 is located on one side of the host 1, and the support platform 32 is mounted on the top of the base 31. The first drive assembly 33 is mounted on the top of the support platform 32, and the second drive assembly 34 is mounted on the top of the support platform 32. In the vertical direction, the first drive assembly 33 and the second drive assembly 34 are staggered. In the horizontal direction, the first drive assembly 33 and the second drive assembly 34 are parallel. One end of the driven assembly 35 is mounted on the side wall of the first drive assembly 33, and the driven assembly 35 is hinged to the side wall of the second drive assembly 34. The work platform 36 is fixedly mounted on the top of the driven assembly 35.

[0030] The base 31 provides a mounting base for all components on it. A support platform 32 mounted on top of the base 31 houses the first drive assembly 33 and the second drive assembly 34, which are staggered vertically to avoid motion interference. The sliders of both the first drive assembly 33 and the second drive assembly 34 move along the X-axis. The driven assembly 35 integrates the motion of the two drive assemblies into a two-dimensional planar motion. The driven assembly 35 acts as a movable guide rail by mounting a third slide rail 351 onto the first slider 334, to which the third slider 352 is slidably connected. Simultaneously, a transmission rod 353 hinges the third slider 351 to the second slider 343. Finally, the work platform 36 is fixed to the top of the third slider 352, directly supporting the workpiece.

[0031] The specific working logic is as follows: The control system drives the first slider 334 and the second slider 344 to move independently on the X-axis by controlling the speed and direction of the two drive motors respectively. The movement of the second slider 344 pushes or pulls the third slider 352 through the transmission rod 353, so that it generates Y-direction displacement on the movable guide rail (third slide rail 351) determined by the first slider 334, thereby enabling the working platform to perform pure X-direction, pure Y-direction or XY-direction mixed linear motion at any angle.

[0032] When the first drive component 33 and the second drive component 34 move at the same speed along the X-axis, the driven component 35 also moves at the same speed along the X-axis.

[0033] When the first drive assembly 33 is stationary and the second drive assembly 34 moves alone along the Y-axis, the third slider 352 in the driven assembly 35 moves along the third slide rail 351 fixed on the first drive assembly 33 (Y-axis direction) following the pull of the transmission rod 353.

[0034] When there is a speed difference between the two, such as the driving speed of the second driving component 34 being greater than the driving speed of the first driving component 33, a speed difference is formed between the second slider 344 and the first slider 334. During their movement along the X-axis, the relative positions of the second slider 344 and the first slider 334 in the X-axis direction change, causing the third slider 352 to not only follow the two along the X-axis, but also move along the third slide rail 351 fixed on the first driving component 33 (Y-axis direction) following the pull of the transmission rod 353, thereby integrating the movement in the two directions into an oblique motion.

[0035] If movement in any two-dimensional direction is required, the work platform 36 must first be moved to the designated initial position by the control system. Then, the rotation speed of the first motor 331 and the second motor 341 is controlled by the control system, thereby controlling the moving speed of the first slider 334 and the second slider 344, and then controlling the moving direction and speed of the third slider 352, so as to finally realize the movement of the working area of ​​the dual-drive linkage worktable 3.

[0036] In a specific embodiment, such as Figure 3 and Figure 4 The first drive assembly 33 includes a first motor 331, a first lead screw 332, a first slide rail 333, and a first slider 334. The first slide rail 333 is mounted on the top outer wall of the support platform 32, and the first motor 331 is mounted on the side wall of the top of the support platform 32. The output end of the first motor 331 is connected to the first lead screw 332, which is inserted into the first slide rail 333. The first slider 334 is slidably connected to the first slide rail 333 and the first lead screw 332, and the first slider 334 is threadedly engaged with the first lead screw 332.

[0037] The first motor 331 serves as the power source, receiving signals and outputting rotational motion. The first lead screw 332 acts as a motion converter, transforming the motor's rotational motion into the linear displacement of the slider. The first slide rail 333 provides guidance and load-bearing functions, ensuring the motion trajectory is linear along the X-axis and bearing the load from above to maintain system stability. Finally, the first slider 334 serves as the motion output component and structural connection point of this assembly. Driven by the lead screw, it moves along the slide rail and is directly fixedly connected to the third slide rail 351 in the driven assembly, thus using its own movement along the X-axis as the anchor point of the driven assembly 35.

[0038] In a specific embodiment, such as Figure 3 and Figure 4 The second drive assembly 34 includes a second motor 341, a second lead screw 342, a second slide rail 343, and a second slider 344. The second slide rail 343 is mounted on the top outer wall of the support platform 32, and the second motor 341 is mounted on the side wall of the top of the support platform 32. The output end of the second motor 341 is connected to the second lead screw 342, which is inserted into the second slide rail 343. The second slider 344 is slidably connected to the second slide rail 343 and the second lead screw 342, and the second slider 344 is threadedly engaged with the second lead screw 342. The second motor 341, as a second power source, receives commands from the control system and provides rotational power. The second lead screw 342 converts the rotational motion of the motor into the linear displacement of the second slider 344. The second slide rail 343 provides guidance and support for this motion, ensuring stable operation along the X-axis. The second slider 344, through a transmission rod 353 hinged to its side wall, forms a linkage mechanism with the third slider 352 in the driven assembly 35. The movement of the second slider 344 on the X-axis drives the transmission rod 353 to push or pull the third slider 352 through the hinge structure, thereby converting its own X-axis motion into the motion of the driven component in the Y-axis direction (when there is a speed difference between the first slider 334 and the second slider 344). Therefore, the speed coordination between the second drive component 34 and the first drive component ultimately realizes the movement of the working platform in any straight line or compound direction in the two-dimensional plane.

[0039] In a specific embodiment, such as Figure 3 and Figure 4 The driven component 35 includes a third slide rail 351, a third slider 352, and a transmission rod 353. The third slide rail 351 is mounted on the side wall of the first slider 334. The third slider 352 is slidably connected to the third slide rail 351. The working platform 36 is fixedly connected to the top of the third slider 352. One end of the transmission rod 353 is hinged to the side wall of the third slider 352, and the other end of the transmission rod 353 is hinged to the side wall of the second slider 344.

[0040] The third slide rail 351 is not fixed but is mounted on the first slider 334 of the first drive assembly 33, making it a movable guide. Its function is to define a movable Y-axis direction, providing guidance for the third slider 352. The third slider 352 is slidably connected to the third slide rail 351 and can slide along the Y-axis direction. Its top is directly fixed to the work platform 36, while its sidewalls are hinged to the transmission rod 353. One end of the transmission rod 353 is hinged to the third slider 352, and the other end is hinged to the second slider 344 of the second drive assembly 34, thus connecting the two independent drive assemblies. Its length is fixed, so when the second slider 344 moves along the X-axis and creates a speed difference with the first slider 334, a pushing or pulling force is generated on the third slider 352 through the transmission rod 353. This force is decomposed into two directions: a force along the direction of the third slide rail 351 and a force perpendicular to it, causing the third slider to produce a Y-direction displacement on the third slide rail 351.

[0041] In a specific embodiment, such as Figure 5 The lifting mechanism 2 includes a crane body 21, a boom 22, a clamp 23, a first display 24, and a first guide pipe 25. The crane body 21 is connected to one end of the first guide pipe 25, and the other end of the first guide pipe 25 is electrically connected to the control system. The boom 22 is located on top of the crane body 21, and the clamp 23 is installed at the end of the boom 22. The boom 22 is connected to the automatic focusing welding mechanism 4 via the clamp 23. The first display 24 is hinged to the outer wall of the clamp 23 and is electrically connected to the control system via the first guide pipe 25. The crane body 21 serves as the base of the automatic focusing welding mechanism 4, providing stable support for the entire system. The motor inside the crane body 21 drives the boom 22, providing a wide range of extension and height adjustment freedom, thus moving the automatic focusing welding mechanism 4 to the corresponding working position. The clamp 23 is responsible for the detachable connection with the automatic focusing welding mechanism 4 and ensures its stability during the welding process.

[0042] The first display 24 is hinged to the outer wall of the clamp 23. It is connected in real time to the control system of the host 1 via the first conduit 25. The operator inputs commands through the first display, and the control system interprets and drives the motor of the lifting mechanism to control the lifting mechanism 2 to adjust the position of the boom 22. The first conduit 25 contains not only the transmission lines for the first display 24 and the boom motor, but also the data signal transmission lines. This transmission line harness provides real-time feedback of data and status information, improving operational convenience.

[0043] In a specific embodiment, such as Figure 6The automatic focusing welding mechanism 4 includes a housing 41, a welding head 42, a second guide tube 43, a second display 47, a focusing assembly, and a focusing lens group. The outer wall of the housing 41 is detachably connected to the clamp 23. One end of the second guide tube 43 is inserted into the housing 41, and the other end of the second guide tube 43 is electrically connected to the control system. The focusing assembly is located inside the housing 41 and is electrically connected to the control system through the second guide tube 43. The focusing lens group is located inside the housing 41 and installed at the bottom of the focusing assembly. The optical axis of the focusing lens group is coaxial with the laser beam emitted by the fiber laser. The welding head 42 is installed at the end of the housing 41. An infrared thermometer is nested on the side wall of the welding head 42. The second display 47 is hinged to the outer wall of the housing 41 and is electrically connected to the control system. The housing 41 serves as a support frame and protective cover. The focusing lens group is installed inside, and the focusing lens group is equipped with a focusing assembly consisting of a laser rangefinder, a servo motor, and a transmission mechanism, which together constitute the automatic focusing system. This system can sense changes in the shape and defect height of the workpiece surface in real time and drive the focusing lens group to move, thereby ensuring that the laser focus is always on the welding area. The welding head 42 is responsible for outputting the laser beam, and the infrared thermometer mounted on its side wall can monitor the temperature of the molten pool in real time, providing direct feedback for heat input control. The second display 47, hinged to the housing 41, serves as a human-machine interface, providing operators with real-time welding parameters and status information, enhancing the convenience of operation. At the same time, the second display 47 can also control the movement path of the dual-drive linkage worktable 3 through the human-machine interface. The second conduit 43 supplies power to the above-mentioned mechanisms and transmits all control and feedback signals. These components work together to achieve intelligent laser repair welding with high precision and low heat zone influence.

[0044] In one specific embodiment, the focusing assembly includes a laser rangefinder, a servo motor, and a transmission mechanism. The laser rangefinder is housed within a housing 41, with its ranging direction parallel to the laser beam. The servo motor is mounted on the inner wall of the housing 41. The transmission mechanism is connected between the output shaft of the servo motor and the focusing lens assembly. Both the laser rangefinder and the servo motor are electrically connected to the control system. The laser rangefinder continuously measures the distance between the welding head and the surface of the mold workpiece in real time and feeds the data back to the control system. Based on this data, the control system calculates the required focus compensation value and sends a command to the servo motor, which provides a fast and precise response and power. Finally, the transmission mechanism converts the power of the servo motor into the linear displacement required by the focusing lens assembly, directly driving the focusing lens assembly to move, thereby dynamically adjusting the laser focus. The three components work together to achieve an automated process from perception to decision-making and final execution, ensuring that the welding energy is applied precisely and consistently to the defect in the workpiece.

[0045] In one specific embodiment, the transmission mechanism is either a lead screw and nut or a linear guide slider mechanism. If a lead screw and nut pair is used, the rotational motion of the motor is converted into the linear motion of the nut (connected to the focusing lens assembly) through the engagement of the threads. If a linear guide slider mechanism is used, the motor drives a synchronous belt or another lead screw to move the slider along the linear guide. Its advantages include smooth movement, low frictional resistance, and ensures that the focusing lens assembly moves linearly without wobbling. Both methods effectively ensure that the signal from the focusing motor is executed accurately and smoothly, thereby driving the focusing lens assembly to move precisely.

[0046] In a specific embodiment, such as Figure 6 The automatic focusing welding mechanism 4 is further equipped with a protective mechanism on its outer side. This protective mechanism includes a jet nozzle 44, a gas supply pipe 45, and a gas storage tank 46. The gas storage tanks 46 are arranged in pairs, with their outlet ports connected to one end of the gas supply pipe 45. The jet nozzle 44 has two independent jet channels, and its two inlet ports are connected to the other ends of the two gas supply pipes 45. The jet directions of the jet nozzles 44 converge at the laser focus. The paired gas storage tanks 46 store high-purity inert gas, providing a reliable gas source for the dual-path gas flow. The gas supply pipe 45 is responsible for transporting the gas from the gas storage tanks 46 to the welding head 42. Ultimately, the dual independent jet channels of the jet nozzle 44 can eject protective gas flow from multiple angles. These gas flows converge in the laser focus area, forming a tight gas barrier that eliminates air interference and prevents the high-temperature molten pool from reacting chemically with oxygen and nitrogen, thereby avoiding defects such as oxidation, nitriding, and porosity in the weld.

[0047] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A mold repair and welding machine, characterized in that, include: The host (1) is equipped with a fiber laser and a control system. A dual-drive linkage workbench (3) is set on one side of the host (1), and the dual-drive linkage workbench (3) is electrically connected to the control system. The lifting mechanism (2) is located on the side of the dual-drive linkage workbench (3) away from the host (1), and the lifting mechanism (2) is electrically connected to the control system; An automatic focusing welding mechanism (4) is installed at the execution end of the hoisting mechanism (2). The automatic focusing welding mechanism (4) is located above the dual-drive linkage worktable (3). The automatic focusing welding mechanism (4) is connected to the optical path of the fiber laser. The automatic focusing welding mechanism (4) is also electrically connected to the control system. An infrared thermometer is installed on the automatic focusing welding mechanism (4), and the infrared thermometer is electrically connected to the control system.

2. The mold repair and welding machine as described in claim 1, characterized in that, The dual-drive linkage workbench (3) includes: A base (31) is disposed on one side of the host (1), and a support platform (32) is mounted on the top of the base (31). The first drive component (33) is mounted on top of the support platform (32); The second drive assembly (34) is mounted on top of the support platform (32); In the vertical direction, the first drive component (33) and the second drive component (34) are staggered, and in the horizontal direction, the first drive component (33) and the second drive component (34) are parallel. The driven component (35) is mounted at one end on the side wall of the first drive component (33) and is hinged to the side wall of the second drive component (34); The working platform (36) is fixedly installed on top of the driven component (35).

3. The mold repair and welding machine as described in claim 2, characterized in that, The first driving component (33) includes: The first slide rail (333) is installed on the top outer wall of the support platform (32); The first motor (331) is installed on the side wall of the top of the support platform (32). The output end of the first motor (331) is connected to the first lead screw (332), which is inserted into the first slide rail (333). The first slider (334) is slidably connected to the first slide rail (333), and the first slider (334) is threadedly engaged with the first lead screw (332).

4. The mold repair and welding machine as described in claim 3, characterized in that, The second driving component (34) includes: The second slide rail (343) is installed on the top outer wall of the support platform (32); The second motor (341) is installed on the side wall of the top of the support platform (32). The output end of the second motor (341) is connected to the second lead screw (342), which is inserted into the second slide rail (343). The second slider (344) is slidably connected to the second slide rail (343), and the second slider (344) is threadedly engaged with the second lead screw (342).

5. The mold repair and welding machine as described in claim 4, characterized in that, The driven component (35) includes: The third slide rail (351) is installed on the side wall of the first slider (334), and the third slider (352) is slidably connected on the third slide rail (351). The working platform (36) is fixedly connected to the top of the third slider (352). The transmission rod (353) is hinged at one end to the side wall of the third slider (352) and at the other end to the side wall of the second slider (344).

6. The mold repair and welding machine as described in claim 1, characterized in that, The lifting mechanism (2) includes: The crane body (21) has a connection port that is connected to one end of the first guide tube (25), and the other end of the first guide tube (25) is electrically connected to the control system. A boom (22) is mounted on top of the crane body (21); A clamp (23) is installed at the execution end of the boom (22), and the boom (22) is connected to the automatic focusing welding mechanism (4) through the clamp (23); The first display (24) is hinged to the outer wall of the clamp (23), and the first display (24) is electrically connected to the control system through the first conduit (25).

7. The mold repair and welding machine as described in claim 6, characterized in that, The automatic focusing welding mechanism (4) includes: The outer wall of the housing (41) is detachably connected to the clamp (23); The second conduit (43) has one end inserted into the housing (41) and the other end electrically connected to the control system. A focusing assembly is disposed within the housing (41), and the focusing assembly is electrically connected to the control system via the second conduit (43); A focusing lens assembly is disposed inside the housing (41) and installed at the bottom of the focusing assembly. The optical axis of the focusing lens assembly is coaxial with the laser beam emitted by the fiber laser. A welding head (42) is installed at the end of the housing (41), and the infrared thermometer is nested on the side wall of the welding head (42); The second display (47) is hinged to the outer wall of the housing (41) and is electrically connected to the control system.

8. The mold repair and welding machine as described in claim 7, characterized in that, The focusing component includes: A laser rangefinder sensor is installed inside the housing (41), and its ranging direction is parallel to the laser beam; A servo motor is mounted on the inner wall of the housing (41); The transmission mechanism is connected between the output shaft of the servo motor and the focusing lens group. Both the laser rangefinder and the servo motor are electrically connected to the control system.

9. The mold repair and welding machine as described in claim 1, characterized in that, The automatic focusing welding mechanism (4) is further provided with a protective mechanism on its outer side, the protective mechanism including: Gas storage tanks (46) are arranged in pairs, with their outlet ports connected to one end of the gas supply pipe (45); The jet nozzle (44) has two independent jet channels. The two air inlet ports of the jet nozzle (44) are connected to the other ends of the two air supply pipes (45). The jet directions of the jet nozzle (44) converge at the laser focus.

Images