Method and system for fortifying trance and distribution controllable material surface laser fortificating
A laser strengthening and trajectory technology, applied in lasers, laser welding equipment, laser parts, etc., can solve the problems of affecting the processing effect, uneven surface strengthening, long time, etc., and achieve the effect of excellent strength and toughness.
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Embodiment 1
[0044] Refer to attached image 3 A beam expander 2 and a focus lens 4 are sequentially arranged on the optical path of the output light of the laser 8, and a φ50mm two-dimensional lens with a diameter of 50 mm is added between the beam expander 2 and the focus mirror 4, which can make the beam form a 3×3 lattice. element optical conversion element 3, namely figure 1 The optical conversion element 3 is shown.
[0045] Refer to attached Figure 4 with 5 , the output end of the laser 8 is connected with the laser processing head 11 by an optical fiber 13; the laser 8 is electrically connected with the laser processing head 11 through a communication cable 14, the movement of the laser processing head 11 is controlled by the industrial computer 9, and the photoelectric detector 12 will collect The received optical signal is converted into a high-level voltage signal and input to the industrial control computer 9.
[0046] The laser beam 1 emitted from the laser 8 enters the b...
Embodiment 2
[0048] This embodiment adopts the system of embodiment 1, and the difference is that a 500WYAG pulsed laser 8 (peak power up to 7KW) is used, and the laser processing head 11 is installed on a five-degree-of-freedom frame robot 10 (such as Chinese Patent Publication No. CN1215644 processing device), laser parameters: pulse width 24ms, pulse repetition rate 4Hz; use a binary optical conversion element 3 that can form a beam into a 3×3 lattice, use a single pulse, the waveform is rectangular, and the spot size is 1.25×1.25mm 2 , the total energy density on the spot is 7.5J / mm 2 , for 9×9×15mm 3 Ductile Iron Specimen 6 9 x 15mm 2 The surface is laser treated, and the treated surface is as Image 6 shown.
[0049] The method for laser strengthening of the surface of a specific material includes the following steps:
[0050] (1) After the processing system is started, adjust the laser processing head 11 to the starting position according to the macro-processing trajectory datab...
Embodiment 3
[0056] The structure of this embodiment is the same as that of Embodiment 1, except that this embodiment adopts binary optical conversion elements distributed in a 7×7 lattice in space, and is arranged in the optical path system of the device of the embodiment. A YAG laser 8 with an average power of 2000W is used. The parameters of the laser 8 are: pulse width 80ms, pulse repetition rate 2Hz; a rectangular single pulse with a spot size of 3×3mm 2 , the energy density on the spot is 12.4J / mm 2 , the moving speed of the robot 10 is 50 mm / s, the distance between two connected light spots on the macro-processing linear trajectory is 0.2 mm, and the dwell time at each light spot position is 80 ms. The 9×15 surface of the 9×9×15 nodular cast iron sample 6 is laser treated, and the treated surface is as follows Figure 7 As shown, the wear resistance test (ring block wear tester, load 1500N, wear time 60h, lubricated with No. 20 engine oil) shows that the wear resistance of the lase...
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