Light high-strength part surface damage repairing device based on stirring friction

Abstract

The invention belongs to the technical field of damage repair, and particularly relates to a light high-strength part surface damage repair device based on stirring friction. The friction repairing module is mounted on the base through the lifting module; the fixed end of the repair part horizontal moving assembly is fixedly connected with the base, the movable end of the repair part horizontal moving assembly is used for clamping a to-be-repaired part, and the to-be-repaired part is located below the friction repair module; the friction repair module comprises a shell, and a stock bin used for storing metal powder for scratch repair is arranged in the shell. The fixed end of the rotation driving part is fixedly connected with the movable end of the lifting module, an output shaft of the rotation driving part is in transmission connection with the shell, and the rotation driving part is used for driving the shell to rotate; and the scratch friction assembly is coaxially arranged at the bottom of the shell, the scratch friction assembly is used for making contact with the surface of the to-be-repaired part and making friction with the surface of the to-be-repaired part, and the feeding end of the scratch friction assembly communicates with the discharging end of the stock bin.

Description

Technical Field

[0001] The present invention belongs to the technical field of damage repair, and in particular relates to a device for repairing surface damage of lightweight and high-strength parts based on stir friction. Background Art

[0002] With the rapid development of the automotive and aerospace industries, the demand for lightweight, high-strength metal parts is increasing. Magnesium and aluminum alloys have been widely used due to their low density, high strength, and high toughness. Under severe cyclic working load conditions, the working surfaces and surface layers of aluminum and magnesium alloy parts will inevitably show signs of use. If these signs are severe, the surface damage of the parts needs to be repaired as necessary.

[0003] Traditional repair methods mainly include traditional fusion welding, electric spark alloying, laser multi-layer cladding, etc. These repair methods are based on the repair process of material melting. The repair area is generally a coarse dendritic cast structure, and excessive local heat input during the repair process is prone to secondary defects such as thermal cracks and shrinkage cavities. In addition, electric spark alloying and laser multi-layer cladding are only suitable for repairing surface damage, and have no obvious repair effect on internal defects such as cracks at a certain depth on the surface of the part.

[0004] As a new defect repair technology, friction stir repair offers significant advantages: low welding temperature, fine grain size, minimal deformation and residual stress, a green and pollution-free process, and no secondary defects such as cracks or pores during the repair process. Therefore, it holds broad application prospects in the field of damage repair. Therefore, based on these advantages, we propose a friction stir-based device for repairing surface damage on lightweight, high-strength parts. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for repairing surface damage of lightweight and high-strength parts based on stir friction to solve the above problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A device for repairing surface damage of lightweight and high-strength parts based on stir friction, comprising:

[0008] base;

[0009] A friction repair module is installed on the base via a lifting module;

[0010] A repairing component horizontally moving assembly, wherein the fixed end is fixedly connected to the base, and the movable end of the repairing component horizontally moving assembly is used to clamp the component to be repaired, and the component to be repaired is located below the friction repair module;

[0011] The friction repair module includes:

[0012] A housing, wherein a silo for storing metal powder for scratch repair is provided in the housing;

[0013] A rotation drive unit, wherein a fixed end is fixedly connected to the movable end of the lifting module, an output shaft of the rotation drive unit is in driving connection with the housing, and the rotation drive unit is used to drive the housing to rotate;

[0014] A scratch friction assembly is coaxially arranged at the bottom of the shell, and is used to contact and rub the surface of the part to be repaired. The feed end of the scratch friction assembly is connected to the discharge end of the silo.

[0015] Optionally, the scratch friction component includes:

[0016] A friction head module, axially connected to the bottom of the housing;

[0017] a partition plate, axially connected to the inner side of the housing, with a gap being provided between the partition plate and the friction head module;

[0018] A lifting plate module is arranged in the gap, and the lifting plate module is vertically slidably arranged in the shell;

[0019] A plurality of stirring pins, the top ends of which are fixedly connected to the lifting plate module, the bottom ends of which pass through the friction head module, and the bottom ends of which are used to contact the surface of the workpiece to be repaired to expand the scratch area;

[0020] A plurality of powder feed pipes, the middle portion of which is fixedly connected to the lifting plate module. When the lifting plate module rises, the top of the powder feed pipe is connected to the bottom of the silo. The powder feed pipe is hollow and connects the silo with the discharge end of the friction head module.

[0021] The lifting part is in driving connection with the lifting plate module, and the lifting part is used to control the lifting of the lifting plate module.

[0022] Optionally, the lifting part includes:

[0023] The lifting plate module divides the gap into a spring chamber located at the upper part and a sealing chamber located at the lower part;

[0024] A spring is provided in the spring cavity, the spring is coaxially fixed to the top of the lifting plate module, and the top end of the spring is fixed to the bottom end of the partition plate;

[0025] The spring cavity is in communication with the outside via an air hole, and the air hole is provided in the partition;

[0026] A gas-liquid phase change material is provided in the sealed cavity, and the friction head module is arranged for heat exchange with the sealed cavity.

[0027] Optionally, symmetrically arranged vertical guide rods are fixedly connected to both sides of the gap, the vertical guide rods are vertically slidably matched with the lifting plate module, and the vertical guide rods are radially limited matched with the lifting plate module.

[0028] Optionally, the lifting plate module includes a lifting plate, and sliding grooves for slidingly cooperating with the vertical guide rod are provided on both sides of the lifting plate. A plurality of stirring needle mounting holes for threadedly fixedly connected to the stirring needle are provided on the lifting plate, and a plurality of powder feed pipe mounting holes for threadedly fixedly connected to the middle part of the powder feed pipe are provided on the lifting plate.

[0029] Optionally, the friction head module includes a friction head, a plurality of stirring needle channels are opened on the friction head, the stirring needle channels are slidingly matched with the stirring needle seal, a plurality of powder feed pipe channels are opened on the friction head, the powder feed pipe channels are slidingly matched with the powder feed pipe seal, a spiral pattern is provided at the bottom of the friction head, and a plurality of the powder feed pipe channels and a plurality of the stirring needle channels are spaced apart along the direction of the spiral pattern.

[0030] Optionally, the silo includes:

[0031] A powder silo is threadedly connected to the inner wall of the shell, the bottom of the powder silo is a closed structure, the powder silo is connected to the powder inlet pipe via a powder inlet pipe through-hole provided on the partition, a one-way valve is installed on the top of the powder inlet pipe through-hole, and when the powder inlet pipe rises, it pushes open the one-way valve and then extends into the powder silo to communicate with the powder silo;

[0032] A coupling is axially connected to the top of the top cover of the powder bin, and the coupling is used to be axially connected to the output shaft of the rotation drive unit. A plurality of air holes are opened on the top cover of the powder bin, and the air holes are arranged around the coupling.

[0033] Metal powder is filled in the powder bin;

[0034] The vibration module contacts the bottom of the powder bin and is disposed in the shell.

[0035] Optionally, the vibration module includes:

[0036] A vibration ring is movably arranged in the shell, and a piezoelectric vibrator is transmission-connected in the vibration ring. The piezoelectric vibrator is electrically connected to a power supply, and the power supply is electrically connected to a wireless power supply board through wireless charging. The wireless power supply board is fixed to the base.

[0037] Optionally, the rotation drive unit includes:

[0038] A mounting base, fixedly connected to one end of a crossbeam, wherein the other end of the crossbeam is fixedly connected to the movable end of the lifting module;

[0039] A motor, a fixed end of which is embedded in the mounting seat, and an output shaft of the motor is axially connected to the coupling;

[0040] A camera is fixedly connected to one side of the mounting seat, and the camera is arranged toward the part to be repaired. A light source is fixedly connected to one side of the mounting seat, and the light source is arranged toward the part to be repaired.

[0041] Optionally, the repair part horizontal movement component includes:

[0042] An X-axis linear slide, the fixed end of which is fixedly connected to the base, the movable end of which is fixedly connected to the fixed end of the Y-axis linear slide, the movable end of which is fixedly connected to a fixture, and the fixture is used to clamp and fix the part to be repaired;

[0043] The lifting module comprises:

[0044] A Z-axis linear slide, a fixed end of which is fixedly connected to the base, and a movable end of which is fixedly connected to the beam.

[0045] Compared with the prior art, the present invention has the following advantages and technical effects:

[0046] During use, the workpiece to be repaired is installed on the horizontal moving assembly of the repair workpiece to achieve horizontal movement of the workpiece to be repaired, and the friction repair module is set on the lifting module to achieve vertical lifting of the friction repair module, so that the scratch area on the workpiece to be repaired is conveniently aligned with the friction repair module. When repairing scratches, the scratch friction assembly contacts and rubs with the surface of the workpiece to be repaired, and friction heat is generated on the surface of the workpiece to be repaired. At the same time, the metal powder in the hopper enters the repair area, and the friction heat is used to recombine the metal powder and the workpiece to be repaired into one, thereby finally achieving the scratch repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0048] Figure 1 It is a schematic diagram of the structure of the present invention;

[0049] Figure 2 This is a structural diagram of the friction repair module of the present invention;

[0050] Figure 3 This is an enlarged view of the bottom of the friction repair module of the present invention;

[0051] Figure 4 This is a structural diagram of the friction head module of the present invention;

[0052] Figure 5 Schematic diagram of the spiral pattern structure of the present invention;

[0053] Figure 6 This is a schematic diagram of the lifting plate module structure of the present invention;

[0054] Among them, 1. Base; 2. Z-axis linear slide; 3. Beam; 4. Mounting seat; 5. Motor; 6. Light source; 7. Camera; 8. Friction repair module; 9. Part to be repaired; 10. Fixture; 11. Y-axis linear slide; 12. X-axis linear slide; 13. Wireless power supply board; 801. Housing; 802. Coupling; 803. Powder bin; 804. Air hole; 805. Metal powder; 806. Vibration ring; 807. Piezoelectric vibrator; 808. Partition; 809 , friction head module; 810, vertical guide rod; 811, lifting plate module; 812, powder feed pipe; 813, one-way valve; 814, stirring needle; 815, spring; 816, gas-liquid phase change material; 817, powder feed pipe through hole; 8091, friction head; 8092, powder feed pipe channel; 8093, stirring needle channel; 8094, spiral pattern; 8111, lifting plate; 8112, slide; 8113, powder feed pipe mounting hole; 8114, stirring needle mounting hole. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0056] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] Reference Figures 1 to 6 The present invention discloses a device for repairing surface damage of lightweight and high-strength parts based on stir friction, comprising:

[0058] Base 1;

[0059] The friction repair module 8 is installed on the base 1 through the lifting module;

[0060] The repairing part horizontal moving assembly has a fixed end fixedly connected to the base 1 and a movable end used for clamping the repaired part 9, which is located below the friction repair module 8;

[0061] Friction repair module 8 includes:

[0062] Housing 801, housing 801 is provided with a silo for storing metal powder for scratch repair;

[0063] The rotation drive unit has a fixed end fixedly connected to the movable end of the lifting module, and an output shaft of the rotation drive unit is in transmission connection with the housing 801, and the rotation drive unit is used to drive the housing 801 to rotate;

[0064] The scratch and friction assembly is coaxially arranged at the bottom of the shell 801. The scratch and friction assembly is used to contact and rub the surface of the part to be repaired 9. The feed end of the scratch and friction assembly is connected to the discharge end of the silo.

[0065] During use, the horizontal movement of the part to be repaired 9 is achieved by installing it on the horizontal moving assembly of the repair part, and the vertical lifting of the friction repair module 8 is achieved by setting the friction repair module 8 on the lifting module, so that the scratch area on the part to be repaired 9 is aligned with the friction repair module 8. When repairing scratches, the scratch friction assembly contacts and rubs the surface of the part to be repaired 9, and friction generates heat on the surface of the part to be repaired 9. At the same time, the metal powder in the hopper enters the repair area, and the friction heat causes the metal powder and the part to be repaired 9 to be recombined into one, thereby finally achieving the scratch repair.

[0066] As an optional embodiment, the scratch friction assembly includes:

[0067] The friction head module 809 is axially connected to the bottom of the housing 801;

[0068] The partition plate 808 is axially connected to the inner side of the housing 801, and a gap is set between the partition plate 808 and the friction head module 809;

[0069] The lifting plate module 811 is disposed in the gap and is vertically slidably disposed in the housing 801;

[0070] A plurality of stirring pins 814, the top ends of which are fixedly connected to the lifting plate module 811, and the bottom ends of the stirring pins 814 pass through the friction head module 809, and the bottom ends of the stirring pins 814 are used to contact the surface of the workpiece 9 to be repaired to expand the scratch area;

[0071] Several powder inlet pipes 812 are fixedly connected to the lifting plate module 811 in the middle. When the lifting plate module 811 rises, the top of the powder inlet pipe 812 is connected to the bottom of the silo. The powder inlet pipe 812 is hollow and connects the silo to the discharge end of the friction head module 809.

[0072] The lifting part is in driving connection with the lifting plate module 811 and is used to control the lifting and lowering of the lifting plate module 811.

[0073] The working principle of this device is to destroy the scratch area through a number of stirring needles 814, and then raise the number of stirring needles 814 through the lifting part, so that the friction head module 809 rotates the scratch area to generate heat by friction, so that the metal powder dropped in the scratch area is melted under the friction action of the friction head module 809 to fill the scratch, thereby achieving scratch repair.

[0074] As an optional embodiment, the lifting unit includes:

[0075] The lifting plate module 811 divides the gap into a spring chamber located at the top and a sealing chamber located at the bottom;

[0076] A spring 815 is provided in the spring cavity. The spring 815 is coaxially fixed to the top of the lifting plate module 811. The top of the spring 815 is fixed to the bottom of the partition 808.

[0077] The spring chamber is connected to the outside through an air hole, which is provided in the partition 808;

[0078] A gas-liquid phase change material 816 is provided in the sealed cavity, and the friction head module 809 is provided for heat exchange with the sealed cavity.

[0079] The working principle of the lifting part is that, at the initial stage of operation of the device, the lifting plate module 811 is squeezed downward by the action of the spring 815 so that the bottom end of the stirring needle 814 installed on the lifting plate module 811 contacts the surface of the part to be repaired 9 to further damage the scratch area. As the friction head module 809 gradually contacts and starts to rub against the part to be repaired 9, heat is generated and transmitted to the sealed cavity through the friction head module 809. The heat causes the gas-liquid phase change material 816 arranged in the sealed cavity to vaporize and generate a large air pressure, thereby pushing the lifting plate module 811 to overcome the spring 815 and rise. At this time, the stirring needle 814 is away from the part to be repaired 9, and the powder feed pipe 812 enters the hopper, so that the metal powder in the hopper enters the scratch area through the powder feed pipe 812, and is melted into liquid by the heat generated by friction to repair the scratch.

[0080] When the repair is completed, the friction head module 809 moves away from the part to be repaired 9, the scratched surface cools and solidifies, and at the same time the gas-liquid phase change material 816 naturally cools and condenses into liquid, the air pressure in the sealed cavity drops, and the spring 815 pushes the lifting plate module 811 to extend the bottom end of the stirring needle 814.

[0081] The gas-liquid phase change material 816 is preferably water.

[0082] As an optional embodiment, symmetrically arranged vertical guide rods 810 are fixed on both sides of the gap, and the vertical guide rods 810 are vertically slidably matched with the lifting plate module 811, and the vertical guide rods 810 are radially limited matched with the lifting plate module 811.

[0083] As an optional embodiment, the lifting plate module 811 includes a lifting plate 8111, and sliding grooves 8112 for slidingly cooperating with the vertical guide rod 810 are provided on both sides of the lifting plate 8111. A plurality of stirring needle mounting holes 8114 for threadedly fixedly connected to the stirring needle 814 are provided on the lifting plate 8111, and a plurality of powder feed pipe mounting holes 8113 for threadedly fixedly connected to the middle part of the powder feed pipe 812 are provided on the lifting plate 8111.

[0084] As an optional embodiment, the friction head module 809 includes a friction head 8091, on which a number of stirring needle channels 8093 are opened, and the stirring needle channels 8093 are sealed and slidably matched with the stirring needle 814; the friction head 8091 is provided with a number of powder feed pipe channels 8092, and the powder feed pipe channels 8092 are sealed and slidably matched with the powder feed pipe 812; a spiral pattern 8094 is provided at the bottom of the friction head 8091, and a number of powder feed pipe channels 8092 and a number of stirring needle channels 8093 are spaced apart along the direction of the spiral pattern 8094.

[0085] The spiral pattern 8094 facilitates the uniform flow of metal from the surface of the part to the surrounding areas.

[0086] As an optional embodiment, the silo includes:

[0087] The powder silo 803 is threadedly connected to the inner wall of the housing 801. The bottom of the powder silo 803 is a closed structure. The powder silo 803 is connected to the powder inlet pipe 812 through a powder inlet pipe through-hole 817 provided on the partition 808. A one-way valve 813 is installed on the top of the powder inlet pipe through-hole 817. When the powder inlet pipe 812 rises, it pushes open the one-way valve 813 and extends into the powder silo 803 to communicate with the powder silo 803.

[0088] The top cover of the powder bin 803 is axially connected to a coupling 802, which is used to be axially connected to the output shaft of the rotary drive unit. The top cover of the powder bin 803 is provided with a plurality of air holes 804, which are arranged around the coupling 802.

[0089] Metal powder 805 is filled in the powder bin 803;

[0090] The vibration module contacts the bottom of the powder bin 803 and is disposed inside the housing 801 .

[0091] The powder bin 803 is filled with metal powder 805, and the powder bin 803 is threadedly connected to the inner wall of the shell 801 for easy disassembly and replenishment of the metal powder 805. A number of air holes 804 are opened on the top cover of the powder bin 803. Filter cotton or filter mesh can be added in the air holes 804, so that the powder bin 803 can be connected to the outside and prevent the metal powder 805 from falling.

[0092] As an optional embodiment, the vibration module includes:

[0093] The vibration ring 806 is movably arranged in the shell 801. The piezoelectric vibrator 807 is transmission-connected in the vibration ring 806. The piezoelectric vibrator 807 is electrically connected to a power supply. The power supply is electrically connected to a wireless power supply board 13 through wireless charging. The wireless power supply board 13 is fixed to the base 1.

[0094] Power is supplied via the wireless power supply board 13, causing the friction head module 809 to contact the repaired component 9 before the piezoelectric vibrator 807 begins operating. Once energized, the piezoelectric vibrator 807 vibrates, causing the vibration ring 806 to vibrate. This vibration is movably positioned within the gap between the housing 801 and the partition 808. This vibration of the vibration ring 806 drives the powder hopper 803 to vibrate, allowing the metal powder 805 inside to easily fall into the powder inlet pipe 812.

[0095] The opening of the one-way valve 813 faces the powder bin 803. The one-way valve 813 includes two valve plates, which are hinged on the valve plate mounting ring through a torsion spring. The valve plate mounting ring is fixed to the inner wall of the powder inlet pipe through-hole 817. The powder inlet pipe 812 can push open the two valve plates through the valve plate mounting ring to enter the powder bin 803.

[0096] As an optional embodiment, the rotation drive unit includes:

[0097] The mounting base 4 is fixedly connected to one end of the crossbeam 3, and the other end of the crossbeam 3 is fixedly connected to the movable end of the lifting module;

[0098] The motor 5, with its fixed end embedded in the mounting base 4, has its output shaft connected to the coupling 802;

[0099] A camera 7 is fixedly connected to one side of the mounting seat 4 , and the camera 7 is arranged toward the part to be repaired 9 . A light source 6 is fixedly connected to one side of the mounting seat 4 , and the light source 6 is arranged toward the part to be repaired 9 .

[0100] The purpose of setting light source 6 is to facilitate observation of the scratch repair effect. The camera 7 can be set to observe or record the repair process. It can also automatically identify scratches and repair them through the equipped visual recognition system.

[0101] As an optional embodiment, the repair component horizontal movement assembly includes:

[0102] An X-axis linear slide 12, whose fixed end is fixedly connected to the base 1, and whose movable end is fixedly connected to the fixed end of the Y-axis linear slide 11, and whose movable end is fixedly connected to the fixture 10, for clamping and fixing the workpiece 9 to be repaired;

[0103] The lifting module includes:

[0104] The fixed end of the Z-axis linear slide 2 is fixedly connected to the base 1 , and the movable end of the Z-axis linear slide 2 is fixedly connected to the beam 3 .

[0105] As the core linear motion component in automation equipment, linear slides are mainly divided into two categories based on the transmission method: synchronous belt type and ball screw type.

[0106] The synchronous belt linear slide consists of a belt, linear guide, aluminum alloy profile, coupling, motor and photoelectric switch. The slider movement is achieved through belt transmission. The belt is installed on the drive shafts on both sides of the slide. The power input shaft drives the belt to displace the slider fixed to the belt. The tightness can be adjusted by screws to optimize the transmission efficiency. It is suitable for long-stroke, high-speed and medium-to-low precision scenarios. It has low noise and low cost, but the accuracy is affected by the belt quality and processing technology. The positioning accuracy is usually higher than 0.1 mm.

[0107] The ball screw type is composed of a ball screw, linear guide, aluminum alloy profile, screw support seat, coupling and motor. When the screw rotates, the rotational motion is converted into linear motion through the ball nut pair. It has high rigidity, high positioning accuracy (screw accuracy grade, such as C7 casting grade accuracy of 0.02 mm), strong load capacity and low friction characteristics, but the speed is limited by the screw lead. The larger the lead, the faster the speed and the correspondingly reduced load capacity. From the external structure, both can be divided into open and closed designs: the open structure exposes the transmission components, and the force is concentrated in the middle and lower part and on both sides, which is convenient for maintenance but susceptible to environmental interference; the closed type seals the transmission components, relies on external materials to bear the force, provides better dust and splash protection, and is suitable for clean or harsh environments. It can be subdivided into semi-enclosed and fully enclosed types to adapt to different protection needs.

[0108] In terms of mechanical design, linear slides utilize an aluminum alloy profile as their base frame, integrating the guide rail system, transmission mechanism, and drive unit. The guide rail system typically utilizes linear guides or plastic guide plates to ensure smooth motion, high rigidity, and minimize thermal deformation. Within the transmission mechanism, synchronous belt-type systems rely on the meshing of belts and pulleys to transmit power, and can be equipped with rigid guide rails to increase load capacity. Ball screw-type systems utilize a screw-nut pair for precision transmission. Their lifespan and thrust can be calculated using the lead and input torque (thrust formula: input torque × 2 × π × motor efficiency / lead).

[0109] Slides are often expanded into multi-axis systems through modular combinations, such as cross slides (XY axes) or XYZ robotic arms. This involves attaching one slide to another, and using independent servo control on each axis to achieve complex trajectory motion within a plane or space. The control system integrates sensors (such as photoelectric switches and encoders) and servo / stepper motors, providing real-time position and speed feedback. Combined with programmed instructions, it enables reciprocating motion, multi-point positioning, and stepless speed regulation. Thrust output can be matched to motor power and speed parameters (belt thrust formula: N(0.102 × motor power × 1000 / speed) × 10).

[0110] The core of the operating principle is to convert the motor's rotational motion into precise linear displacement. When the ball screw is working, the servo motor drives the screw to rotate through the coupling, forcing the ball nut fixed to the slide to move along the screw's axial direction. The guide rail system constrains the direction of movement and provides support, thereby achieving high-precision positioning. Its accuracy is affected by the screw manufacturing grade (C3-C7) and the length ratio (screw diameter × 60). Long strokes require additional correction to avoid deviation. The synchronous belt type drives the belt through the motor-driven drive shaft. The belt is fixed to the slider to drive the load. There is no critical speed limit and it is suitable for high-speed and long-distance transportation. However, the dynamic accuracy is affected by the elastic deformation and tension control of the belt. Both types need to consider thermal deformation, rigidity matching and lubrication maintenance to ensure long-term stability. When installed vertically, it is also necessary to overcome the gravity load and optimize the acceleration and deceleration curve through algorithms to reduce vibration. Finally, common linear motor types used in linear slide drives include U-slot type (hollow core structure, no suction interference), cylindrical type (axial magnetic rod and coil move relative to each other), and flat type (including three types: ironless, iron core, and slotted iron core, with the iron core structure enhancing thrust but requiring the handling of magnetic attraction).

[0111] The X-axis linear slide 12, the Y-axis linear slide 11 and the Z-axis linear slide 2 can all be linear slides in the form of ball screws.

[0112] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0113] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A device for repairing surface damage of lightweight and high-strength parts based on stir friction, characterized in that: include: Base (1); A friction repair module (8) is mounted on the base (1) via a lifting module; A repairing part horizontal moving assembly, the fixed end of which is fixedly connected to the base (1), and the movable end of which is used for clamping the part to be repaired (9), wherein the part to be repaired (9) is located below the friction repair module (8); The friction repair module (8) comprises: A housing (801), wherein a silo for storing metal powder for scratch repair is provided in the housing (801); A rotation drive unit, a fixed end of which is fixedly connected to the movable end of the lifting module, an output shaft of the rotation drive unit is in driving connection with the housing (801), and the rotation drive unit is used to drive the housing (801) to rotate; A scratching and friction component is coaxially arranged at the bottom of the shell (801), and is used to contact and rub the surface of the part to be repaired (9). The feed end of the scratching and friction component is connected to the discharge end of the silo.

2. The device for repairing surface damage of lightweight and high-strength parts based on stir friction according to claim 1, characterized in that: The scratch friction assembly comprises: A friction head module (809) is axially connected to the bottom of the housing (801); A partition (808) is axially connected to the inner side of the housing (801), and a gap is provided between the partition (808) and the friction head module (809); A lifting plate module (811) is arranged in the gap, and the lifting plate module (811) is vertically slidably arranged in the housing (801); A plurality of stirring pins (814), the top ends of which are fixedly connected to the lifting plate module (811), the bottom ends of which pass through the friction head module (809), and the bottom ends of which are used to contact the surface of the workpiece (9) to be repaired to expand the scratch area; A plurality of powder feed pipes (812), the middle portion of which is fixedly connected to the lifting plate module (811), the lifting plate module (811) rises to connect the top end of the powder feed pipe (812) with the bottom of the silo, the powder feed pipe (812) is hollow, and the powder feed pipe (812) connects the silo with the discharge end of the friction head module (809); A lifting part is connected to the lifting plate module (811) in a transmission manner, and the lifting part is used to control the lifting of the lifting plate module (811).

3. The device for repairing surface damage of lightweight and high-strength parts based on stir friction according to claim 2, characterized in that: The lifting part includes: The lifting plate module (811) divides the gap into a spring chamber located at the top and a sealing chamber located at the bottom; A spring (815) is provided in the spring cavity, the spring (815) is coaxially fixed to the top of the lifting plate module (811), and the top end of the spring (815) is fixed to the bottom end of the partition (808); The spring cavity is in communication with the outside via an air hole, and the air hole is provided in the partition (808); A gas-liquid phase change material (816) is provided in the sealed cavity, and the friction head module (809) is arranged for heat exchange with the sealed cavity.

4. The device for repairing surface damage of lightweight and high-strength parts based on friction stir according to claim 2, characterized in that: Symmetrically arranged vertical guide rods (810) are fixedly connected to both sides of the gap, and the vertical guide rods (810) are vertically slidably matched with the lifting plate module (811), and the vertical guide rods (810) are radially limited matched with the lifting plate module (811).

5. The device for repairing surface damage of lightweight and high-strength parts based on friction stir according to claim 4, characterized in that: The lifting plate module (811) includes a lifting plate (8111), and the lifting plate (8111) is provided with a slide groove (8112) on both sides for slidingly cooperating with the vertical guide rod (810), and the lifting plate (8111) is provided with a plurality of stirring needle mounting holes (8114) for threadedly fixedly connected to the stirring needle (814), and the lifting plate (8111) is provided with a plurality of powder feed pipe mounting holes (8113) for threadedly fixedly connected to the middle part of the powder feed pipe (812).

6. The device for repairing surface damage of lightweight and high-strength parts based on friction stir according to claim 2, characterized in that: The friction head module (809) includes a friction head (8091), a plurality of stirring needle channels (8093) are provided on the friction head (8091), and the stirring needle channels (8093) are sealed and slidably matched with the stirring needle (814); a plurality of powder feed pipe channels (8092) are provided on the friction head (8091), and the powder feed pipe channels (8092) are sealed and slidably matched with the powder feed pipe (812); a spiral pattern (8094) is provided at the bottom of the friction head (8091), and a plurality of the powder feed pipe channels (8092) and a plurality of the stirring needle channels (8093) are spaced apart along the direction of the spiral pattern (8094).

7. The device for repairing surface damage of lightweight and high-strength parts based on stir friction according to claim 3, characterized in that: The silo comprises: The powder bin (803) is threadedly connected to the inner wall of the housing (801). The bottom of the powder bin (803) is a closed structure. The powder bin (803) is connected to the powder inlet pipe (812) through a powder inlet pipe through hole (817) provided on the partition (808). A one-way valve (813) is installed on the top of the powder inlet pipe through hole (817). When the powder inlet pipe (812) rises, it pushes open the one-way valve (813) and then extends into the powder bin (803) to communicate with the powder bin (803). A coupling (802) is axially connected to the top of the top cover of the powder bin (803), and the coupling (802) is used to be axially connected to the output shaft of the rotation drive unit. A plurality of air holes (804) are opened on the top cover of the powder bin (803), and the air holes (804) are arranged around the coupling (802); Metal powder (805) is filled in the powder bin (803); A vibration module is in contact with the bottom of the powder bin (803), and the vibration module is arranged in the housing (801).

8. The device for repairing surface damage of lightweight and high-strength parts based on stir friction according to claim 7, characterized in that: The vibration module includes: A vibration ring (806) is movably arranged in the shell (801), and a piezoelectric vibrator (807) is transmission-connected in the vibration ring (806). The piezoelectric vibrator (807) is electrically connected to a power supply, and the power supply is electrically connected to a wireless power supply board (13) through a wireless charging method. The wireless power supply board (13) is fixed to the base (1).

9. The device for repairing surface damage of lightweight and high-strength parts based on stir friction according to claim 7, characterized in that: The rotation drive unit includes: A mounting seat (4) is fixedly connected to one end of a crossbeam (3), and the other end of the crossbeam (3) is fixedly connected to the movable end of the lifting module; A motor (5), the fixed end of which is embedded in the mounting seat (4), and the output shaft of the motor (5) is axially connected to the coupling (802); A camera (7) is fixedly connected to one side of the mounting seat (4), and the camera (7) is arranged toward the part to be repaired (9). A light source (6) is fixedly connected to one side of the mounting seat (4), and the light source (6) is arranged toward the part to be repaired (9).

10. The device for repairing surface damage of lightweight and high-strength parts based on stir friction according to claim 9, characterized in that: The repair part horizontal movement component includes: An X-axis linear slide (12), a fixed end of which is fixedly connected to the base (1), a movable end of which is fixedly connected to the fixed end of the Y-axis linear slide (11), a movable end of which is fixedly connected to a clamp (10), and the clamp (10) is used to clamp and fix the part to be repaired (9); The lifting module includes: A Z-axis linear slide (2) has a fixed end fixedly connected to the base (1), and a movable end of the Z-axis linear slide (2) is fixedly connected to the crossbeam (3).

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