Laser cladding device with temperature control function for metal repair

Abstract

The invention discloses a laser cladding device with a temperature control function for metal repair, and relates to the technical field of laser cladding, a to-be-repaired workpiece is clamped and fixed through a clamp on a workbench, a mechanical arm drives a laser cladding head to move above the workpiece, a laser emitter emits laser, and meanwhile, a powder feeder conveys metal powder into an adjusting groove; the adjusting assembly controls the size of the adjusting groove, so that the length of coke breeze is adjusted, metal powder is sprayed to the defect of the workpiece from the powder outlet, the metal powder is melted by laser, a cladding layer is formed on the defect of the workpiece, the workpiece is repaired, and the cooling mechanism conveys cooling water to the cooling groove of the laser cladding head. And meanwhile, an annular gas curtain of inert gas is formed in the cladding area, the cladding area is isolated, and the situation that metal on the surface of a workpiece reacts with gas in air, and consequently the repairing quality is affected is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser cladding, and particularly relates to a laser cladding device for metal repair with a temperature control function. BACKGROUND

[0002] The existing laser cladding device for metal repair needs to replace a laser cladding head to change the length of a powder focus during repair of workpieces, because different workpieces have different shapes and different repair depths of the workpieces. The laser cladding head needs to be manually disassembled and assembled each time, thereby increasing the repair time and affecting the repair efficiency. If the metal on the surface of the workpiece is a high-activity metal, the metal on the surface of the workpiece is prone to reacting with active gases in the air at high temperatures, thereby affecting the repair quality. SUMMARY

[0003] The application aims to provide a laser cladding device for metal repair with a temperature control function to solve the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme. A laser cladding device for metal repair with a temperature control function, which comprises a base, a mechanical arm, a laser cladding head, a powder feeder, a cooling mechanism, a protection mechanism and a workbench. The base and the mechanical arm are fixedly connected. The laser cladding head and the mechanical arm are fixedly connected. The powder feeder and the laser cladding head are connected by a pipeline. The powder feeder and the base are fixedly connected. The cooling mechanism and the laser cladding head are connected by a pipeline. The cooling mechanism and the base are fixedly connected. The protection mechanism and the laser cladding head are connected by a pipeline. The protection mechanism and the base are fixedly connected. The workbench and the base are fixedly connected.

[0005] The base is provided with the mechanical arm, the powder feeder, the cooling mechanism, the protection mechanism and the workbench to provide a stable working environment. The workbench is provided with a clamp to clamp and fix a workpiece to be repaired. The laser cladding head is arranged at the end of the mechanical arm. The laser cladding head is driven by the mechanical arm to move above a defect of the workpiece to be repaired. The length of the powder focus is adjusted according to the depth of the defect of the workpiece to be repaired. The laser cladding head emits laser. The powder feeder supplies metal powder for repair to the laser cladding head. The metal powder is sprayed from the outlet of the laser cladding head to the defect of the workpiece. The metal powder is melted by the laser to form a cladding layer on the defect of the workpiece, thereby repairing the workpiece. The cooling mechanism supplies cooling water to the laser cladding head to prevent the metal powder from being bonded due to overheating. The protection mechanism supplies inert gas to the laser cladding head. The inert gas is sprayed from the laser cladding head to isolate the cladding area, thereby preventing the metal on the surface of the workpiece from reacting with active gases such as oxygen, nitrogen and hydrogen in the air, and affecting the repair quality.

[0006] Further, the laser cladding head comprises a shell, a plurality of powder conveying units, a laser emitter, a collimating lens, a focusing mirror and a temperature control unit, the powder conveying units are fixedly connected with the shell, the laser emitter is fixedly connected with the shell, the collimating lens is fixedly connected with the shell, the temperature control unit is fixedly connected with the shell, and the focusing mirror is fixedly connected with the temperature control unit.

[0007] The laser emitter installed in the shell is started to emit laser, the laser passes through the collimating lens to become straight-line laser, the calibrated laser passes through the focusing mirror to converge to a point to form a cladding area, the position of the focusing mirror is adjusted by the temperature control unit to control the size of the light spot and the temperature of the cladding area, and the metal powder output by the powder feeder is conveyed to the cladding area by the powder conveying units.

[0008] Further, the powder conveying unit comprises a guide block, a vibration assembly, a fixing rod, an adjusting plate and an adjusting assembly, the shell is provided with an adjusting groove, the fixing rod is fixedly connected with the adjusting groove, the guide block is fixedly connected with the fixing rod, the vibration assembly is fixedly connected with the guide block, the adjusting plate is slidingly connected with the adjusting groove, the adjusting assembly is fixedly connected with the shell, the adjusting assembly is fixedly connected with the adjusting plate, the shell is provided with a powder conveying channel, the powder conveying channel is communicated with the adjusting groove, and the shell is provided with a powder outlet.

[0009] The metal powder output by the powder feeder first enters the powder conveying channel, then enters the adjusting groove through the powder conveying channel, is fixed in the adjusting groove by the guide block through the fixing rod, and then passes through the guide block before entering the powder outlet provided in the shell, so that the metal powder is prevented from caking by the vibration assembly built in the guide block, the adjusting groove is prevented from being blocked, the position of the adjusting plate is adjusted by the adjusting assembly to control the size of the adjusting groove and adjust the powder focus length.

[0010] Further, the adjusting assembly comprises a first motor, a first screw rod, a first nut, a limiting block and a sliding block, the first motor is fixedly connected with the shell, the output end of the first motor is fixedly connected with the first screw rod, the first screw rod is rotatably connected with the shell, the first screw rod is in transmission connection with the first nut, the limiting block is fixedly connected with the first screw rod, the sliding block is slidingly connected with the shell, the first nut is fixedly connected with the sliding block, and the first nut is fixedly connected with the adjusting plate.

[0011] The first screw rod is installed on the shell, the first motor is installed on the shell through the base, the output end of the first motor is fixedly connected with the first screw rod, the first motor can drive the first screw rod to rotate, the first nut is in transmission connection with the first screw rod through the cooperation of the built-in ball of the first nut and the first screw rod, the limiting block is arranged at the end of the first screw rod, so that the first nut is prevented from sliding out of the first screw rod, the sliding block is fixed with the first nut, the sliding block slides with the outer convex pipe in the adjusting groove of the shell, the first nut moves along the first screw rod with the rotation of the first screw rod, the sliding block moves with the first nut, and then the sliding block drives the adjusting plate to move, so that the size of the adjusting groove is controlled.

[0012] Further, the vibration assembly comprises an ultrasonic piezoelectric ceramic sheet and electrodes, the electrodes are provided with two, the guide block is provided with a mounting groove, and the two electrodes are arranged in the mounting groove and fixedly connected with the ultrasonic piezoelectric ceramic sheet.

[0013] The ultrasonic piezoelectric ceramic sheet is arranged in the mounting groove of the guide block, electrodes are fixedly arranged on the two sides of the ultrasonic piezoelectric ceramic sheet, alternating current is applied to the ultrasonic piezoelectric ceramic sheet through the electrodes, the ultrasonic piezoelectric ceramic sheet generates periodic expansion and contraction, thereby generating high-frequency vibration, and then driving the guide block to vibrate, so as to prevent the metal powder from caking.

[0014] Further, the guide block is provided with a guide surface, and the guide surface is conical, and the shell is provided with a conical groove.

[0015] The guide surface of the guide block is conical, so that the metal powder flows to the periphery of the guide block, and the conical groove at the bottom of the adjusting groove makes the metal powder re-converge and be conveyed into the powder outlet.

[0016] Further, the adjusting plate comprises a fixed block, a spring and a sliding plate, the fixed block is fixedly connected with the first nut, the fixed block is fixedly connected with the spring, and the sliding plate is slidably connected with the fixed block.

[0017] The spring is arranged on the fixed block and fixed at the other end of the sliding plate, the sliding plate can slide on the fixed block, the material of the spring is shape memory alloy, the spring can contract and release according to the temperature, so that the sliding plate slides on the fixed block according to the temperature change, and then the change of the temperature is prevented from affecting the change of the coke length.

[0018] Further, the temperature control unit comprises a second motor, a second screw rod, a second nut and a fixed ring, the second motor is fixedly connected with the shell, the output end of the second motor is fixedly connected with the second screw rod, the second nut is in transmission connection with the second screw rod, the fixed ring is fixedly connected with the second nut, and the fixed ring is fixedly connected with the focusing mirror.

[0019] The second motor is fixed in the shell, the output end of the second motor is fixed with the second screw rod, the other end of the second screw rod is rotatably connected with the shell, so that the second motor can drive the second screw rod to rotate, the ball in the second nut is matched with the second screw rod, so that the second nut and the second screw rod are drivingly connected, the second nut and the fixed ring are fixed, the fixed ring and the focusing mirror are fixed, so that the second motor can drive the focusing mirror to move along the second screw rod, thereby adjusting the position of the focusing mirror, controlling the size of the light spot and controlling the temperature of the cladding area.

[0020] Further, the cooling mechanism comprises a cooler and a water pump, the cooler and the water pump are pipeline connected, the shell is provided with a cooling tank, the cooling tank and the water pump are pipeline connected, the cooler and the cooling tank are pipeline connected, and the shell is provided with a vacuum tank.

[0021] The output end of the water pump is pipeline connected with the inlet of the cooling tank of the shell, and the input end of the water pump is pipeline connected with the cooler, so that the water pump can deliver the cooling water of the cooler into the cooling tank, the outlet of the cooling tank is pipeline connected with the cooler, so that the cooling water can return to the cooler, the cooling tank is arranged between the laser channel and the powder conveying channel, and the vacuum tank is arranged between the cooling tank and the powder conveying channel, thereby preventing the metal powder in the powder conveying channel from being bonded due to overheating.

[0022] Further, the protection mechanism comprises an air pump and a gas storage tank, the air pump and the gas storage tank are pipeline connected, the shell is provided with a distribution tank, the air pump and the distribution tank are pipeline connected, the shell is provided with an annular groove, and the distribution tank and the annular groove are communicated.

[0023] The input end of the air pump is pipeline connected with the gas storage tank, and the output end of the air pump is pipeline connected with the distribution tank of the shell, so that the air pump can deliver the inert gas in the gas storage tank to the distribution tank, so that the inert gas can uniformly enter the annular groove, and the inert gas is sprayed out of the outlet of the annular groove, so as to form an annular air curtain to isolate the cladding area.

[0024] Compared with the prior art, the beneficial effects of the present application are: 1. The adjusting groove is arranged on the laser cladding head, the size of the adjusting groove is controlled by the adjusting assembly, the powder focus length is adjusted, the laser cladding head can adapt to various workpieces, and the powder focus length can be adjusted according to the depth of the repaired part, so that the laser cladding head does not need to be replaced when different workpieces or different repair depths are repaired, thereby reducing the repair time.

[0025] 2. The guiding block and the vibration assembly are arranged in the adjusting groove, so as to prevent the metal powder from caking, and the cooling mechanism is arranged to prevent the metal powder from being bonded due to overheating, thereby avoiding the influence of the caked metal powder on the repair quality.

[0026] 3. The protection mechanism forms an annular gas curtain of inert gas in the cladding area, thereby isolating the cladding area, preventing the reaction between the metal on the workpiece surface and the gas in the air, and improving the quality of the repair.

[0027] 4. The temperature control unit adjusts the position of the focusing mirror to control the size of the light spot, and further control the temperature of the cladding area. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the application; Figure 2 is a schematic diagram of the structure of the laser cladding head of the application; Figure 3 is a schematic diagram of the internal structure of the laser cladding head of the application; Figure 4 is a partial A enlarged view of Figure 3 ; Figure 5 is a schematic diagram of the adjustment assembly of the application; Figure 6 is a schematic diagram of the vibration assembly of the application; Figure 7 is a schematic diagram of the temperature control unit of the application; Figure 8 is a schematic diagram of the distribution groove of the application; Figure 9 is a partial B enlarged view of Figure 3 ; Figure 10 is a schematic diagram of the powder outlet distribution of the application.

[0029] In the figure: 1, base; 2, mechanical arm; 3, laser cladding head; 31, shell; 311, adjustment groove; 312, powder conveying channel; 313, powder outlet; 314, conical groove; 315, cooling groove; 316, vacuum groove; 317, distribution groove; 318, annular groove; 32, powder conveying unit; 321, guide block; 3211, mounting groove; 3212, guide surface; 322, vibration assembly; 3221, ultrasonic piezoelectric ceramic sheet; 3222, electrode; 323, fixed rod; 324, adjustment plate; 3241, fixed block; 3242, spring; 3243, sliding plate; 325, adjustment assembly; 3251, No. 1 motor; 3252, No. 1 lead screw; 3253, No. 1 nut; 3254, limit block; 3255, sliding block; 33, laser emitter; 34, collimating lens; 35, focusing mirror; 36, temperature control unit; 361, No. 2 motor; 362, No. 2 lead screw; 363, No. 2 nut; 364, fixed ring; 4, powder feeder; 5, cooling mechanism; 51, cooler; 52, water pump; 6, protection mechanism; 61, air pump; 62, gas storage tank; 7, workbench. Detailed Implementation

[0030] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0031] Example: Figure 1 As shown, the present invention provides a technical solution for a laser cladding device for metal repair with temperature control function. The laser cladding device includes a base 1, a robotic arm 2, a laser cladding head 3, a powder feeder 4, a cooling mechanism 5, a protection mechanism 6, and a worktable 7. The base 1 and the robotic arm 2 are fixedly connected, the laser cladding head 3 and the robotic arm 2 are fixedly connected, the powder feeder 4 and the laser cladding head 3 are connected by pipes, the powder feeder 4 and the base 1 are fixedly connected, the cooling mechanism 5 and the laser cladding head 3 are connected by pipes, the cooling mechanism 5 and the base 1 are fixedly connected, the protection mechanism 6 and the laser cladding head 3 are connected by pipes, the protection mechanism 6 and the base 1 are fixedly connected, and the worktable 7 and the base 1 are fixedly connected.

[0032] The robotic arm 2, powder feeder 4, cooling mechanism 5, protection mechanism 6, and worktable 7 are mounted on the base 1 to provide a stable working environment. The workpiece to be repaired is clamped and fixed by the fixture on the worktable 7. The laser cladding head 3 is installed at the end of the robotic arm 2. The robotic arm 2 drives the laser cladding head 3 to move above the defect of the workpiece to be repaired. The laser cladding head 3 adjusts the powder coke length according to the depth of the defect of the workpiece to be repaired. The laser cladding head 3 emits a laser, and at the same time, the powder feeder 4 delivers metal powder for repair to the laser cladding head 3. The metal powder is sprayed onto the defect of the workpiece from the outlet set on the laser cladding head 3. The metal powder is melted by the laser, thereby forming a cladding layer on the defect of the workpiece, thus repairing the workpiece. Cooling water is delivered to the laser cladding head 3 through the cooling mechanism 5 to prevent the metal powder from sticking due to overheating. Inert gas is delivered to the laser cladding head 3 through the protection mechanism 6. The inert gas is sprayed out from the laser cladding head 3 to isolate the cladding area and prevent the metal on the surface of the workpiece from reacting with reactive gases such as oxygen, nitrogen, and hydrogen in the air, which would affect the quality of the repair.

[0033] like Figure 3 As shown, the laser cladding head 3 includes a housing 31, a powder conveying unit 32, a laser emitter 33, a collimating lens 34, a focusing lens 35, and a temperature control unit 36. Several powder conveying units 32 are provided. The housing 31 and several powder conveying units 32 are fixedly connected. The laser emitter 33 is fixedly connected to the housing 31. The collimating lens 34 is fixedly connected to the housing 31. The temperature control unit 36 ​​is fixedly connected to the housing 31. The focusing lens 35 is fixedly connected to the temperature control unit 36.

[0034] The laser emitter 33 installed in the shell 31 is started to emit laser, the laser passes through the collimating lens 34 to become straight laser, the calibrated laser passes through the focusing mirror 35 to converge to a point to form a cladding area, the temperature control unit 36 adjusts the position of the focusing mirror 35 to control the size of the light spot and the temperature of the cladding area, and the powder conveying unit 32 conveys the metal powder output by the powder feeder 4 to the cladding area.

[0035] As shown in Figure 4 , the powder conveying unit 32 includes a guide block 321, a vibration assembly 322, a fixed rod 323, an adjusting plate 324 and an adjusting assembly 325, the shell 31 is provided with an adjusting groove 311, the fixed rod 323 and the adjusting groove 311 are fixedly connected, the guide block 321 and the fixed rod 323 are fixedly connected, the vibration assembly 322 and the guide block 321 are fixedly connected, the adjusting plate 324 and the adjusting groove 311 are slidingly connected, the adjusting assembly 325 and the shell 31 are fixedly connected, the adjusting assembly 325 and the adjusting plate 324 are fixedly connected, the shell 31 is provided with a powder conveying channel 312, the powder conveying channel 312 and the adjusting groove 311 are communicated, and the shell 31 is provided with a powder outlet 313.

[0036] The powder conveying channel 312 provided on the shell 31 allows the metal powder output by the powder feeder 4 to first enter the powder conveying channel 312, the metal powder enters the adjusting groove 311 through the powder conveying channel 312, the guide block 321 is fixed in the adjusting groove 311 through the fixed rod 323, so that the metal powder first passes through the guide block 321 before entering the powder outlet 313 provided on the shell 31, and the vibration assembly 322 built in the guide block 321 prevents the metal powder from caking and further prevents the adjusting groove 311 from being blocked, the position of the adjusting plate 324 is adjusted by the adjusting assembly 325 to control the size of the adjusting groove 311 and thus adjust the length of the powder focus.

[0037] As shown in Figure 4 and Figure 5 , the adjusting assembly 325 includes a first motor 3251, a first lead screw 3252, a first nut 3253, a limiting block 3254 and a sliding block 3255, the first motor 3251 and the shell 31 are fixedly connected, the output end of the first motor 3251 and the first lead screw 3252 are fixedly connected, the first lead screw 3252 and the shell 31 are rotatably connected, the first lead screw 3252 and the first nut 3253 are in transmission connection, the limiting block 3254 and the first lead screw 3252 are fixedly connected, the sliding block 3255 and the shell 31 are slidingly connected, the first nut 3253 and the sliding block 3255 are fixedly connected, and the first nut 3253 and the adjusting plate 324 are fixedly connected.

[0038] The first screw rod 3252 is installed on the shell 31, the first motor 3251 is installed on the shell 31 through the base, the output end of the first motor 3251 is fixedly connected with the first screw rod 3252, the first motor 3251 can drive the first screw rod 3252 to rotate, the first screw rod 3252 is in transmission connection with the first nut 3253 through the cooperation of the built-in balls of the first nut 3253 and the first screw rod 3252, the first nut 3253 is prevented from sliding out of the first screw rod 3252 by arranging the limiting block 3254 at the end of the first screw rod 3252, the sliding block 3255 is fixed with the first nut 3253, the sliding block 3255 slides in the protruding pipe of the adjusting groove 311 of the shell 31, the first nut 3253 moves along the first screw rod 3252 when the first screw rod 3252 rotates, the sliding block 3255 moves with the first nut 3253, and the adjusting plate 324 is driven to move by the sliding block 3255, so that the size of the adjusting groove 311 is controlled.

[0039] As shown in Figure 6 , the vibration assembly 322 comprises an ultrasonic piezoelectric ceramic sheet 3221 and an electrode 3222, the electrode 3222 is provided with two, the guide block 321 is provided with a mounting groove 3211, and the two electrodes 3222 are arranged in the mounting groove 3211 and fixedly connected with the ultrasonic piezoelectric ceramic sheet 3221.

[0040] The ultrasonic piezoelectric ceramic sheet 3221 is arranged in the mounting groove 3211 of the guide block 321, the electrodes 3222 are fixedly arranged on the two sides of the ultrasonic piezoelectric ceramic sheet 3221, the alternating current is applied to the ultrasonic piezoelectric ceramic sheet 3221 through the electrodes 3222, the ultrasonic piezoelectric ceramic sheet 3221 generates periodic expansion and contraction, thereby generating high-frequency vibration, and the guide block 321 is driven to vibrate, so that the metal powder is prevented from caking.

[0041] As shown in Figure 4 and Figure 6 , the guide block 321 is provided with a guide surface 3212, the guide surface 3212 is conical, and the shell 31 is provided with a conical groove 314.

[0042] The guide surface 3212 of the guide block 321 is conical, so that the metal powder flows to the periphery of the guide block 321, and the conical groove 314 at the bottom of the adjusting groove 311 makes the metal powder re-converge and be conveyed into the powder outlet 313.

[0043] As shown in Figure 5 , the adjusting plate 324 comprises a fixed block 3241, a spring 3242 and a sliding plate 3243, the fixed block 3241 is fixedly connected with the first nut 3253, the fixed block 3241 is fixedly connected with the spring 3242, and the sliding plate 3243 is slidingly connected with the fixed block 3241.

[0044] Through the spring 3242 arranged on the fixed block 3241, the other end of the spring 3242 and the sliding plate 3243 are fixed, the sliding plate 3243 can slide on the fixed block 3241, the material of the spring 3242 is shape memory alloy, so that the spring 3242 can shrink and release according to the temperature, so that the sliding plate 3243 slides on the fixed block 3241 according to the temperature change, thereby preventing the change of the temperature from affecting the change of the length of the powder coke.

[0045] As shown in Figure 3 and Figure 7 , the temperature control unit 36 includes a second motor 361, a second lead screw 362, a second nut 363 and a fixed ring 364, the second motor 361 and the shell 31 are fixedly connected, the output end of the second motor 361 and the second lead screw 362 are fixedly connected, the second nut 363 and the second lead screw 362 are drivingly connected, the fixed ring 364 and the second nut 363 are fixedly connected, and the fixed ring 364 and the focusing mirror 35 are fixedly connected.

[0046] Through the second motor 361 fixed in the shell 31, the output end of the second motor 361 and the second lead screw 362 are fixed, the other end of the second lead screw 362 and the shell 31 are rotatably connected, so that the second motor 361 can drive the second lead screw 362 to rotate, the second nut 363 and the second lead screw 362 are drivingly connected through the cooperation of the built-in balls of the second nut 363 and the second lead screw 362, the second nut 363 and the fixed ring 364 are fixed, the fixed ring 364 and the focusing mirror 35 are fixed, so that the second motor 361 can drive the focusing mirror 35 to move along the second lead screw 362, thereby adjusting the position of the focusing mirror 35, controlling the size of the light spot and controlling the temperature of the cladding area.

[0047] As shown in Figure 1 , Figure 8 and Figure 9 , the cooling mechanism 5 includes a cooler 51 and a water pump 52, the cooler 51 and the water pump 52 are connected by pipelines, the shell 31 is provided with a cooling tank 315, the cooling tank 315 and the water pump 52 are connected by pipelines, the cooler 51 and the cooling tank 315 are connected by pipelines, and the shell 31 is provided with a vacuum tank 316.

[0048] Through the pipeline connection between the output end of the water pump 52 and the inlet of the cooling tank 315 of the shell 31, and the pipeline connection between the input end of the water pump 52 and the cooler 51, the water pump 52 can transport the cooling water of the cooler 51 into the cooling tank 315, the outlet of the cooling tank 315 and the cooler 51 are connected by pipelines, so that the cooling water can return to the cooler 51, the cooling tank 315 is arranged between the laser channel and the powder conveying channel 312, and the vacuum tank 316 is arranged between the cooling tank 315 and the powder conveying channel 312, thereby preventing the metal powder in the powder conveying channel 312 from being bonded due to overheating.

[0049] As Figure 1 and Figures 7-10 shown, the protection mechanism 6 includes a gas pump 61 and a gas tank 62, the gas pump 61 and the gas tank 62 are connected by pipeline, the shell 31 is provided with a distribution groove 317, the gas pump 61 and the distribution groove 317 are connected by pipeline, the shell 31 is provided with an annular groove 318, the distribution groove 317 and the annular groove 318 are communicated.

[0050] The gas pump 61 is connected by pipeline at the input end and the gas tank 62, and the output end of the gas pump 61 is connected by pipeline with the distribution groove 317 of the shell 31, so that the gas pump 61 delivers the inert gas in the gas tank 62 to the distribution groove 317, so that the inert gas uniformly enters the annular groove 318, and the inert gas is sprayed out from the outlet of the annular groove 318, thereby forming an annular gas curtain to isolate the cladding area.

[0051] Working principle: through the clamp on the workbench 7, the workpiece to be repaired is clamped and fixed, the mechanical arm 2 drives the laser cladding head 3 to move above the workpiece to be repaired, the first motor 3251 can drive the first lead screw 3252 to rotate, so that the first nut 3253 moves, the sliding block 3255 moves with the first nut 3253, so that the sliding block 3255 drives the adjusting plate 324 to move, thereby controlling the size of the adjusting groove 311, at the same time, the spring 3242 made of shape memory alloy can contract and release according to the temperature, so that the sliding plate 3243 slides on the fixed block 3241 according to the temperature change, thereby adjusting the length of the powder coke, starting the laser emitter 33 to emit laser, the laser converges to a point through the focusing mirror 35, forming a cladding area, at the same time, the second motor 361 can drive the second lead screw 362 to rotate, so that the second motor 361 can drive the focusing mirror 35 to move along the second lead screw 362, thereby adjusting the position of the focusing mirror 35, controlling the size of the light spot, and further controlling the temperature of the cladding area, the metal powder is delivered into the adjusting groove 311 through the powder feeder 4, and the metal powder is delivered into the cladding area through the powder outlet 313, at the same time, the alternating current is applied to the ultrasonic piezoelectric ceramic piece 3221 through the electrode 3222, so that the ultrasonic piezoelectric ceramic piece 3221 generates high-frequency vibration, preventing the metal powder from caking, the water pump 52 delivers the cooling water of the cooler 51 into the cooling groove 315 to cool the shell 31, preventing the metal powder from caking due to overheating, the gas pump 61 delivers the inert gas in the gas tank 62 to the distribution groove 317, so that the inert gas is sprayed out from the outlet of the annular groove 318, thereby forming an annular gas curtain to isolate the cladding area.

[0052] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser cladding device for metal restoration with temperature control function, characterized in that: The laser cladding device includes a base (1), a mechanical arm (2), a laser cladding head (3), a powder feeder (4), a cooling mechanism (5), a protection mechanism (6) and a workbench (7), the base (1) and the mechanical arm (2) are fixedly connected, the laser cladding head (3) and the mechanical arm (2) are fixedly connected, the powder feeder (4) and the laser cladding head (3) are connected by pipelines, the powder feeder (4) and the base (1) are fixedly connected, the cooling mechanism (5) and the laser cladding head (3) are connected by pipelines, the cooling mechanism (5) and the base (1) are fixedly connected, the protection mechanism (6) and the laser cladding head (3) are connected by pipelines, the protection mechanism (6) and the base (1) are fixedly connected, and the workbench (7) and the base (1) are fixedly connected.

2. The laser cladding device for metal restoration with temperature control function according to claim 1, characterized in that: The laser cladding head (3) includes a shell (31), a powder conveying unit (32), a laser emitter (33), a collimating lens (34), a focusing mirror (35) and a temperature control unit (36), the powder conveying unit (32) is provided with a plurality of, the shell (31) and the plurality of powder conveying units (32) are fixedly connected, the laser emitter (33) and the shell (31) are fixedly connected, the collimating lens (34) and the shell (31) are fixedly connected, the temperature control unit (36) and the shell (31) are fixedly connected, and the focusing mirror (35) and the temperature control unit (36) are fixedly connected.

3. The laser cladding device for metal restoration with temperature control function according to claim 2, characterized in that: The powder conveying unit (32) includes a guide block (321), a vibration assembly (322), a fixed rod (323), an adjusting plate (324) and an adjusting assembly (325), the shell (31) is provided with an adjusting groove (311), the fixed rod (323) and the adjusting groove (311) are fixedly connected, the guide block (321) and the fixed rod (323) are fixedly connected, the vibration assembly (322) and the guide block (321) are fixedly connected, the adjusting plate (324) and the adjusting groove (311) are slidingly connected, the adjusting assembly (325) and the shell (31) are fixedly connected, the adjusting assembly (325) and the adjusting plate (324) are fixedly connected, the shell (31) is provided with a powder conveying channel (312), the powder conveying channel (312) and the adjusting groove (311) are communicated, and the shell (31) is provided with a powder outlet (313).

4. The laser cladding device for metal restoration with temperature control function according to claim 3, characterized in that: The adjusting assembly (325) comprises a No. 1 motor (3251), a No. 1 lead screw (3252), a No. 1 nut (3253), a limiting block (3254) and a sliding block (3255), the No. 1 motor (3251) is fixedly connected with the shell (31), the output end of the No. 1 motor (3251) is fixedly connected with the No. 1 lead screw (3252), the No. 1 lead screw (3252) is rotationally connected with the shell (31), the No. 1 lead screw (3252) is in transmission connection with the No. 1 nut (3253), the limiting block (3254) is fixedly connected with the No. 1 lead screw (3252), the sliding block (3255) is in sliding connection with the shell (31), the No. 1 nut (3253) is fixedly connected with the sliding block (3255), and the No. 1 nut (3253) is fixedly connected with the adjusting plate (324).

5. The laser cladding device for metal restoration with temperature control function according to claim 4, characterized in that: The vibration assembly (322) comprises an ultrasonic piezoelectric ceramic sheet (3221) and electrodes (3222), the electrodes (3222) are provided in two, the guide block (321) is provided with a mounting groove (3211), the two electrodes (3222) are arranged in the mounting groove (3211), and the two electrodes (3222) are fixedly connected with the ultrasonic piezoelectric ceramic sheet (3221).

6. The laser cladding device for metal restoration with temperature control function according to claim 5, characterized in that: The guide block (321) is provided with a guide surface (3212), the guide surface (3212) is conical, and the shell (31) is provided with a conical groove (314).

7. The laser cladding device for metal restoration with temperature control function according to claim 6, characterized in that: The adjusting plate (324) comprises a fixed block (3241), a spring (3242) and a sliding plate (3243), the fixed block (3241) is fixedly connected with the No. 1 nut (3253), the fixed block (3241) is fixedly connected with the spring (3242), and the sliding plate (3243) is in sliding connection with the fixed block (3241).

8. The laser cladding device for metal restoration with temperature control function according to claim 7, characterized in that: The temperature control unit (36) comprises a No. 2 motor (361), a No. 2 lead screw (362), a No. 2 nut (363) and a fixing ring (364), the No. 2 motor (361) is fixedly connected with the shell (31), the output end of the No. 2 motor (361) is fixedly connected with the No. 2 lead screw (362), the No. 2 nut (363) is in transmission connection with the No. 2 lead screw (362), the fixing ring (364) is fixedly connected with the No. 2 nut (363), and the fixing ring (364) is fixedly connected with the focusing mirror (35).

9. The laser cladding device for metal restoration with temperature control function according to claim 8, characterized in that: The cooling mechanism (5) comprises a cooler (51) and a water pump (52), the cooler (51) and the water pump (52) are in pipeline connection, the shell (31) is provided with a cooling groove (315), the cooling groove (315) is in pipeline connection with the water pump (52), the cooler (51) is in pipeline connection with the cooling groove (315), and the shell (31) is provided with a vacuum groove (316).

10. The laser cladding device for metal restoration with temperature control function according to claim 9, characterized in that: The protection mechanism (6) comprises a gas pump (61) and a gas storage tank (62), the gas pump (61) and the gas storage tank (62) are connected by pipelines, the shell (31) is provided with a distribution groove (317), the gas pump (61) and the distribution groove (317) are connected by pipelines, and the shell (31) is provided with an annular groove (318).

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