[0037] The above scheme is further explained below in connection with the specific embodiments, and preferred embodiments of the present invention are detailed as follows:
[0038] refer to figure 1 , figure 2 with image 3 A device that extends the service of the part of the side of the part, including the robot arm 1, one side of the robot arm 1, and one end of the robot arm 1 is provided with a circular working head for converting the operating instrument, by setting round Shaped working head, can move its working instrument head along the rotary position of the circular working head 3 in the near center position of the circular working head 3 as needed to move its working instrument head along the screw drive guide rail 20 to operate with the micro-pit surface of the sample. One end of the robot arm 1 is provided with a circular working head 3, and the circular working head includes six lead screw drive rails 20, and the six screw drive rails 20 are respectively provided with a three-dimensional scanner scanner 4, a telescopic ultrasonic vibrating head 5, Cracked flaw detector 6, hollow ring laser head 7, ultrasonic impact head 8 and femtosecond laser head 19, and three-dimensional scanner 4, telescopic ultrasonic vibrating head 5, crack detection instrument 6, hollow ring laser head 7 and ultrasonic impact head 8 and femtosecond laser head 19 are evenly distributed at 60 degrees, and the machine 2 controls the robot arm 1 to move its working instrument along the rotary guide rail into the near center position of the circular working head 3, by setting a retractable ultrasonic vibrating head. 5, the telescopic ultrasonic vibrating head 5 and the ultrasonic impact head 8 can be adjusted up and down according to the spacing between the sample, ensuring that the vibrating head is sufficiently contacted with the non-pit and the micro-pit surface, and detects the crack flaw detector 6 Micro-down edge of the microple pit edge, transmitting crack information to computer 2, computer 2 controls the molten fixing repair of the hollow ring laser head 7, wherein the diameter of the hollow laser beam can adjust the diameter and power size according to the crack size, thereby satisfying Crack repair of different crack size specifications.
[0039]The bottom surface of the circular working head 3 is provided with a liquid nitrogen cooling injection assembly for spraying high pressure liquid nitrogen in the micro-textured region, detaching from the microple pit, which is weak, and the abrasive of most of the loose and bond strength. Reproduction of the microple pit is re-manufactured by hollow laser melting and liquid nitrogen assisting ultrasonic impact to effectively improve the fatigue performance of the microple pit, the liquid nitrogen cooling injection assembly includes a sector duck spray head 9, circle The bottom surface of the working head 3 is provided with a sector-shaped duck spray head 9, and the side of the sector-shaped duck spray head 9 is provided with an electromagnetic suction cup 10, and the top surface of the sector-shaped duck spray head 9 is opened with a liquid nitrogen input hole 11, a circular working head 3. A connecting rod 12 is provided in the bottom surface, wherein one end of the connecting rod 12 is mounted together with the sector duck spray head 9, and a liquid nitrogen tank 13 is provided on one side of the sector, and the liquid nitrogen tank 13 is provided with a pressure control valve. 14, the transport port of the pressure control valve 14 is fixedly mounted, and one end of the conveying tube 15 is attached to the liquid nitrogen input hole 11, wherein the pressure control valve 14 is electrically connected to the computer 2, by providing a fan shape. The duck spray head 9 adjusts the output power of liquid nitrogen by the pressure control valve 14, and the liquid nitrogen inflow conveying tube 15 is sprayed from the sector-shaped duck nozzle 9 through the liquid nitrogen input hole 11, which can make most of the looseness and bond strength weaker. Debris is detached from the microple pit, by providing an electromagnetic suction cup 10, the debris in the pit can be removed, and the effect of cleaning is achieved.
[0040] Refer figure 1 The bottom surface of the fan-shaped duck spray head 9 is provided with a displacement sensor 16, wherein the displacement sensor 16 is electrically connected to the computer 2, and the segmentation sensor 16 can achieve a fine adjustment of the sector-shaped duck nozzle 9 injection position. The sector duck spray head 9 is facing the microple pit reject sample body 17, and the diambling of the micro-pit reject sample body 17 is a frociom 18 to be treated 18.
[0041] Working principle: please refer to figure 1 , figure 2 , image 3 with Figure 4 As shown, first, the three-dimensional shape scanner 4 is first moved through the computer 2 along the leading position of the rotary head 3 into the center position of the circular working head 3 in the surface of the circular working head 3 along the screw drive guide rail. All microile pits are scanned to obtain all geometric parameters of the microple pit, and the coordinate position of each microile pit is processed by the computer 2, and then the pressure control valve 14 regulates the pressure of liquid nitrogen by the pressure control valve 14 by turning on the liquid glyph group 14. , The liquid nitrogen is sprayed by the sector-shaped duck spray head 9, so that most of the abrasive 18 with a weaker bond strength is detached from the microple pit, the circular working head is switched to the retractable ultrasonic vibrating head 5 The micro-pit trial body 17 high-frequency vibration is further transmitted, and the abrasive 18 having a large bond strength is peeled off the surface of the microple pit while opening the electromagnetic suction cup 10, making the frocol shuffled from the microple pit. 18 Sold, for adhesive froclary 18 that is still adhered to the surface of the microple pit surface, the circular working head is switched to the femtosecond laser head 19 to etch it to restore the size specification of the circular microple pit, and then by electromagnetic suction cup 10 Adsorbing the frost, after the froke 18 was cleaned, the crack flaw detector 6 was used to crack the cleaned microple pit, and the microple pit information of the edge crack was transmitted to the computer 2, and the computer 2 gave a signal to a circular operation. Head 3, the circular working head is switched to the hollow ring laser head 7, and the crack-melted closure of all cracks, and then opens the ultrasonic impact head 8 to assist the crack-closed microple pit, which is reduced by residual pulling. At the same time, the chamfer of the microple pit is achieved, and the re-manufacturing of the microple pit is completed.
[0042] Taking the specific device described above, the process of use of the device, and the method of efficient clearance of the micro-pitting and re-manufacturing the extension mechanical parts friction side surface life, the method is not only Limited to the above device.
[0043] Includes the following steps:
[0044] Step 1: Preparation of the optimal circular microple pit morphology in the surface of CR12MOV die steel, the characteristic parameter of the microple pit is 1000 μm in diameter, the depth of the pit is 300 μm, the pit pitch is 200 μm; and the surface of the three-dimensional shape scanner All microile pits are scanned to obtain all geometric feature parameters of the microple pit, and obtain the coordinate position of each microile pit by system processing; after the wear is over, the three-dimensional shape scanner is scanned to scan the microple pit. The new microoven pit geometry parameter, when the average value of all pit depth values reaches one-half of all pits initial depth average, the abrasive stops, open the micro-pit-grinding scavenging device;
[0045] Step 2: Open the liquid nitrogen ejection device, simultaneously spray liquid nitrogen in the left end of the nozzle and the nozzle to the micro-texture region of 10 MPa, and the froci with most of the loose and adhesive strength is from the microple pit. Detach, simultaneously opening the microple pit to 1.1 to 1.2 times; synchronously open the ultrasonic vibration device, the vibration frequency is 50 kHz, the vibration amplitude is 35 μm, so that the substrate is high frequency vibration, and the liquid nitrogen in the wear microple pit is flowing. Under the action of ultrasonic cavitation, a small hole injection is generated, and the frost having a large bond strength is peeled off the surface of the microple pit; the synchronous opening of the DC power source is turned on to energize the electromagnetic suction cup to form a powerful electromagnetic suction, the current is 20A, generate electromagnetic suction 50N / cm 2 It will be synergistic by step 2 and step 3, which makes all the fries from the microple pit peeled off.
[0046] Step 3: For adhesive fries that are still adhered to the microple pit surface, the femtosecond laser is etched to restore the size specification of the circular microple pit, and then the cleaved froci is adsorbed by step 2;
[0047] Step 4: Use the three-dimensional scanner to scan again to clean the microple pit to ensure clean; the pits that do not meet the clear requirements are repeated steps 2-3 again until all the frost in all microple pits is cleaned;
[0048] Step 5: Using the crack injury detector to crack the microple pit, the microple pit information of the edge crack is transmitted to the computer, the computer gives the signal to the circular working head, switch to the hollow ring laser head, pair All cracks of microple pits are cracked, and the laser parameters are: laser power 100W, a spot diameter of 1 mm, and a working time of 0.2 s.
[0049] Step 6: A liquid nitrogen-assisted ultrasonic impact on crack closed microple pit, the circular ultrasonic impact head diameter is 1.2 mm, the vibration frequency is 30 kHz, the vibration amplitude is 5 μm, while reducing the residual pull stress while achieving the microple pit The angle, complete the re-manufacturing of the microple pit.
[0050] The embodiment of the present invention will be described above with reference to the accompanying drawings, but the present invention is not limited to the above embodiment, and without departing from the substantial content of the present invention, any obvious improvement, alternative or variant of the art will be made in the art. Both are the scope of the present invention.
