CN101745740B - Metal plate material ring-shaped light spot laser impact forming method and device - Google Patents
Metal plate material ring-shaped light spot laser impact forming method and device Download PDFInfo
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- CN101745740B CN101745740B CN 200910264809 CN200910264809A CN101745740B CN 101745740 B CN101745740 B CN 101745740B CN 200910264809 CN200910264809 CN 200910264809 CN 200910264809 A CN200910264809 A CN 200910264809A CN 101745740 B CN101745740 B CN 101745740B
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Abstract
The invention provides a metal plate material ring-shaped light spot laser impact forming method and a device. The method is characterized in that a ring-shaped laser light spot is adopted to act on the surface of a work-piece system and then quick plastic deformation occurs on the surface of a work-piece under the function of impact wave induced by laser. The device is mainly composed of a laser generator power supply (26), a control device (25), a machine tool (24), a stepping motor (22), a guide rail (21) and a laser generating system (45). The laser generating system (45) interacts with a cone lens set to generate a hollow light beam, and the hollow light beam is irradiated on the surface of the work-piece to form the ring-shaped light spot. The invention is beneficial for changing the distribution of the laser impact forming force, so as to prevent the cracking in the forming process, thereby improving the laser impact forming property and limit of a plate material, and increasing the finished product rate and the processing speed.
Description
Technical field
The present invention relates to a kind of method and device of metal blank Plastic Forming, especially a kind of method of metal blank laser impact forming and device, specifically a kind of metal plate material ring-shaped light spot laser impact forming method and device.
Background technology
As everyone knows, one of main method that the metal blank Plastic Forming is processed as sheet material forming has been occupied very consequence in whole national economy.Development along with laser processing technology, the laser-impact sheet forming is owing to merged the material modification reinforcement and formed in one, and have characteristics such as super-pressure, quick and high strain rate, in many fields such as automobile, aviation, national defense industry potential application foreground is widely arranged.
" a kind of laser-impact accurate forming method and device (ZL01134063.0) are the most representative a kind of method and device in laser-impact sheet forming technical field to people's invention disclosed patents such as the domestic Zhang Yongkang of Jiangsu University.This patented technology directly utilizes the intense pulse laser bundle to impact the flexible lamina of surface of the work, makes its top layer gasification ionization and forms shock wave, because the shock wave pressure peak value that produces surpasses the MATERIALS ' DYNAMIC yield strength, thereby makes moulding material generation plastic deformation.This patent of invention provides a good idea for metal blank is shaped, but also have following deficiency: (1) is in the laser impact forming process, owing to adopt circle or rectangular light spot, impulsive force is uniform or Gaussian distribution, causes that the shaping inequality is big, panel surface is uneven and very easily ftracture in the centre; (2) the each amount of plastic deformation of plate is little, and for high strength alloy steel with than heavy-gauge sheeting, deflection is littler, and forming efficiency is lower, is difficult to adapt to high strength alloy steel, than heavy-gauge sheeting and large tracts of land shaping etc.Just because of the problems referred to above, this method and device remain at certain distance apart from suitability for industrialized production.
Therefore, up to the present, do not obtain a kind of metal blank laser impact forming method and device for actual industrial production as yet.
Summary of the invention
The objective of the invention is at existing Gaussian distribution and evenly distribution laser beam impact forming method exist easy to crack, inefficient problem, utilize the hollow beam irradiation to induce shock wave to produce percussion and characteristic that sheet metal deformation uniformity and the ultimate deformation degree of depth can significantly be improved in panel surface, invent a kind of metal plate material ring-shaped light spot laser impact forming method and device.
One of technical scheme of the present invention is:
A kind of metal plate material ring-shaped light spot laser impact forming method is characterized in that adopting high-power pulsed laser, and the adjustable laser bundle that high-power pulsed laser is sent forms the hollow light beam by light path system, and irradiation forms ring-shaped light spot at surface of the work; When this loop laser hot spot acts on the surface of workpiece system, the shock wave effect that surface of the work is subjected to induced with laser produces plastic deformation fast, thereby realizes the shaping of workpiece.
The pulse width 10ns of described high-power pulsed laser～100ns, laser energy 0～30J, laser instrument is with repetition rate.
The internal diameter of described loop laser hot spot is 2～15mm, and external diameter is 3～25mm.
Described workpiece system is made up of restraint layer, energy-absorbing layer and workpiece successively, and described energy-absorbing layer is the flexible lamina energy-absorbing layer, and described restraint layer is transparent restraint layer.
Two of technical scheme of the present invention is:
A kind of metal plate material ring-shaped light spot laser impact forming device, it comprises laser generator power supply 26, control device 25, lathe 24, stepper motor 22, guide rail 21 and laser generating system 45, control device 25 respectively with laser generator power supply 26, stepper motor 22 and lathe 24 are electrically connected, mobile workpiece system 23 is installed on the lathe 24, laser generator power supply 26 forms ring-shaped light spot 30 by a laser generating system 45 back output hollow light beams 29 irradiation in workpiece system 23, it is characterized in that stepper motor 22 links to each other with slide block on the guide rail 21 by screw mandrel, slide block forms adjusting device 46 with ring-shaped light spot and links to each other, ring-shaped light spot forms adjusting device 46 by convergent lens 18, first Conical Lenses 19 and second Conical Lenses 20 are formed, convergent lens 18 forms the laser input of adjusting device 46 with adjacent as the 3rd beam expanding lens 17 of laser generating system 45 outputs as ring-shaped light spot, described second Conical Lenses 20 links to each other with slide block 47 on the guide rail 21, stepper motor drives slide block 47 and moves in order to regulate the external diameter of ring-shaped light spot 30, workpiece system 23 is installed on the lathe 24 of laser outlet side of second Conical Lenses 20, workpiece system 23 is adjustable and can move or rotate as the plane under the drive of lathe 23 from the distance of second Conical Lenses 20 on the lathe 24, in order to regulate the internal diameter of ring-shaped light spot 30.
Described laser generating system 45 is mainly by first completely reflecting mirror 1, second speculum 15, the KD*P crystal 2, first polarizer 3, first neodymium glass amplifies rod 4, second neodymium glass amplifies rod 8, the three neodymium glass and amplifies rod 14, outgoing mirror 5, isolator 6, first beam expanding lens, 7, the second beam expanding lens, 9, the three beam expanding lens 17, prime amplifier 8, the one 45 degree total reflective mirror 10, the 2 45 degree total reflective mirrors 11, the 3 45 degree total reflective mirrors 16, second polarizer 12 and 45 degree circulators 13 are formed, wherein the KD*P crystal 2 is worked under 26 controls of laser generator power supply, and first completely reflecting mirror 1 and first polarizer 3 lay respectively at the both sides of KD*P crystal 2, and the outlet side of first polarizer 3 is connected with first neodymium glass in turn and amplifies rod 4, outgoing mirror 5, isolator 6, first beam expanding lens 7, second neodymium glass amplifies rod 8, second beam expanding lens 9 and the one 45 degree total reflective mirror 10; The 3rd neodymium glass amplification rod 14,45 degree circulators 13 and second polarizer 12 are connected in series successively and are placed between second speculum 15 and the 2 45 degree total reflective mirror 11, second polarizer 12 is 45 degree installations and is close to the 2 45 angle of spending total reflective mirror 11, the one 45 degree total reflective mirrors 10 and the 2 45 degree total reflective mirror 11 is 90 degree; The 3 45 spends total reflective mirror 16 and the 12 relative installations of second polarizer, is installed in a side of the 3 45 degree total reflective mirror 16 reflected rays as the 3rd beam expanding lens 17 of laser generating system 45 outputs.
Described workpiece system 23 is made up of workpiece 42, energy-absorbing layer 40 and restraint layer 39 successively, and workpiece 42 is positioned at the bottom.
Laser output gross energy can increase the draw power of laser medium or increase laser instrument amplifier progression and increase according to the laser impact forming technological requirement; Laser pulse width draw power long by the chamber of regulating resonator and the adjusting laser medium realizes.
Beneficial effect of the present invention:
(1) the present invention can regulate laser parameters such as laser pulse width, energy, the interior external diameter of hot spot easily, thereby realize adjusting the size of surge (the shock wave peak pressure reaches several GPa) and distributing, problems such as distortion is inhomogeneous, panel surface is uneven have been solved, improve the laser impact forming surface flatness of plate, can realize impact forging and the precision form of complex part.
(2) ring-shaped light spot percussion is conducive to change the character of stress wave, prevents from causing the slabbing phenomenon, improves laser impact forming and the forming limit of plate, also adapts to the shaping of difficult moulding material.
(3) the present invention has concurrently and impacts the double characteristic that plastic deformation shaping and stress field are shaped, can be according to the requirement of blank shape and shaping law, and make plate produce certain plastic deformation and Stress Field Distribution and be shaped.
(4) produce the time weak point, processing flexibilityization, die cost is little, low cost of manufacture.
(5) the present invention also can be to the thick metal thick plate bending forming that reaches 20mm except can be to the thin plate punching.In addition, also can realize the shaping of difficult moulding material, be shaped as multiple material cold stampings such as high strength knot steel, titanium alloy, magnesium alloy, plastics and composites, even to the fragile material bending forming, realize the crisp dynamic transition of moulding.
Description of drawings
Fig. 1 loop laser impact precision formation system schematic diagram.
Fig. 2 loop laser impact precision forming process schematic diagram.
The various Mode for Laser bundle of Fig. 3 impact forging workpiece cross sectional shape schematic diagram.
The various Mode for Laser bundle of Fig. 4 impact forging limit depth schematic diagram.
Fig. 5 loop laser layering pointwise impact forging schematic diagram.
1: the first completely reflecting mirror (abbreviation completely reflecting mirror); 2:KD*P crystal laser generator power; 3: the first polarizers (abbreviation polarizer); Neodymium glass amplified rod in 4: the first; Neodymium glass amplified rod in 8: the second; Three neodymium glass amplified rod in 14: the; 5: outgoing mirror; 6: isolator; 7: the first beam expanding lens; 9: the second beam expanding lens; 17: the three beam expanding lens; 10: the one 45 ° of completely reflecting mirrors; 11: the 2 45 ° of completely reflecting mirrors; 16: the 3 45 ° of completely reflecting mirrors; 12: the second polarizers; 13:45 ° of circulator; 15: the second completely reflecting mirrors; 18: convergent lens; 19: the first Conical Lenses, 20: the second Conical Lenses; 21: guide rail; 22: stepper motor; 23: the workpiece system; 24: Digit Control Machine Tool; 25: control system; 26: the laser instrument generator; 27: hot spot external diameter spacing d1; 28: hot spot internal diameter spacing d2; 29: the hollow laser beam; 30: ring-shaped light spot; 31: drip molding; 32: hollow laser beam irradiation impact forging workpiece cross section profile; 33: Gaussian distribution laser beam irradiation impact forging workpiece cross section profile; 34: the uniform laser beam irradiation of energy impact forging workpiece cross section profile; 35: Gaussian distribution laser beam irradiation impact forging limit depth; 36: the uniform laser beam irradiation of energy impact forging limit depth; 37: annular spread bombardment with laser beams impact forging limit depth; 38: water flow apparatus; 39: transparent restraint layer; 40: aluminum foil and adhesive tape; 41: anchor clamps; 42: workpiece; 43: impact ground floor; 44: impact the n layer; 45: laser generating system; 46: ring-shaped light spot forms adjusting device; 47: slide block.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment one.
Shown in Fig. 2,5.
A kind of metal plate material ring-shaped light spot laser impact forming method, adopt high-power pulsed laser, the adjustable laser bundle that high-power pulsed laser is sent forms the loop laser hot spot by light path system, this loop laser hot spot is acted on the surface of workpiece system, and the shock wave effect that surface of the work is subjected to induced with laser produces plastic deformation fast.As shown in Figure 2, requirement according to blank shape/material/thickness of slab and shaping law, and the signal of shaping detection feedback system, by external diameter, impact position in central control system comprehensive adjustment laser pulse width, laser energy, the ring-shaped light spot, obtain size and the distribution of rational impulsive force, to obtain accurate workpiece profile and to improve forming efficiency.
During concrete enforcement, laser pulse width 10ns～100ns, laser energy 0～30J, light beam internal diameter 2～15mm, light beam external diameter are 3～25mm, laser instrument is with repetition rate work.
Described workpiece system is made up of Forming Workpiece, restraint layer and energy-absorbing layer successively, and wherein restraint layer is at last layer, is energy-absorbing layer below it, is Forming Workpiece below the energy-absorbing layer.Energy-absorbing layer can adopt the flexible lamina energy-absorbing layer, as: aluminum foil and adhesive tape.Restraint layer is transparent restraint layer, and as flowing water, K9 glass etc., when specifically implementing, the workpiece system also can adopt the existing disclosed workpiece system of patent to be realized.
Embodiment two.
Shown in Fig. 1-5.
A kind of metal plate material ring-shaped light spot laser impact forming device, it comprises laser generator power supply 26, control device 25, lathe 24, stepper motor 22, guide rail 21 and laser generating system 45 and ring-shaped light spot form adjusting device 46, control device 25 respectively with laser generator power supply 26, stepper motor 22 and lathe 24 are electrically connected, mobile workpiece system 23 is installed on the lathe 24, on, laser generator power supply 26 acts on workpiece system 23 by a laser generating system 45 back output ring-shaped light spots, stepper motor 22 links to each other with slide block 47 on the guide rail 21 by screw mandrel, ring-shaped light spot forms adjusting device 46 by convergent lens 18, first Conical Lenses 19 and second Conical Lenses 20 are formed, convergent lens 18 forms the laser input of adjusting device 46 with adjacent as the 3rd beam expanding lens 17 of laser generating system 45 outputs as ring-shaped light spot, described second Conical Lenses 20 links to each other with slide block 47 on the guide rail 21, stepper motor drives slide block 47 and moves in order to regulate the external diameter of ring-shaped light spot 30, workpiece system 23 is installed on the lathe 24 of laser outlet side of second Conical Lenses 20, workpiece system 23 is adjustable and can move or rotate as the plane under the drive of lathe 23 from the distance of second Conical Lenses 20 on the lathe 24, in order to regulate internal diameter and the impact position of ring-shaped light spot 30.Described laser generating system 45 is mainly by first completely reflecting mirror 1, second speculum 15, the KD*P crystal 2, first polarizer 3, first neodymium glass amplifies rod 4, the second neodymium glass and amplifies rod 8, the three neodymium glass amplification rod 14, outgoing mirror 5, isolator 6, the first beam expanding lens 7, the second beam expanding lens 9, the 3rd beam expanding lens 17, prime amplifier 8, the one 45 degree total reflective mirrors 10, the 2 45 degree total reflective mirrors 11, the 3 45 degree total reflective mirror 16, second polarizer, 12,45 degree circulators 13 are formed, and wherein the KD*P crystal 2 is worked under 26 controls of laser generator power supply, first completely reflecting mirror 1 and first polarizer 3 lay respectively at the both sides of KD*P crystal 2, and the outlet side of first polarizer 3 is connected with first neodymium glass in turn and amplifies rod 4, outgoing mirror 5, isolator 6, first beam expanding lens 7, second neodymium glass amplifies rod 8, second beam expanding lens 9 and the one 45 degree total reflective mirror 10; The 3rd neodymium glass amplification rod 14,45 degree circulators 13 and second polarizer 12 are connected in series successively and are placed between second speculum 15 and the 2 45 degree total reflective mirror 11, second polarizer 12 is 45 degree installations and is close to the 2 45 angle of spending total reflective mirror 11, the one 45 degree total reflective mirrors 10 and the 2 45 degree total reflective mirror 11 is 90 degree; The 3 45 degree total reflective mirror 16 and the 12 relative installations of second polarizer, namely the 3 45 degree total reflective mirror 16 should be installed in the position that second polarizer 12 can reflex to, the 3 45 degree total reflective mirror 16 is installed in the bottom of second polarizer 12 among Fig. 1, be installed in a side of the 3 45 degree total reflective mirror 16 reflected rays as the 3rd beam expanding lens 17 of laser generating system 45 outputs, convergent lens 18, first Conical Lenses 19 and second Conical Lenses 20 are installed in the outlet side of the 3rd beam expanding lens 17 successively, second Conical Lenses 20 links to each other with slide block 47 on the guide rail 21, stepper motor drives slide block 47 and moves in order to regulate the external diameter size of ring-shaped light spot 30, lathe is positioned at the light outlet side of second Conical Lenses 20, and workpiece system 23 is installed on the lathe 23 and can moves in order to regulate the internal diameter size of ring-shaped light spot at lathe 23; Described workpiece system 23 is made up of workpiece 42, energy-absorbing layer 40 and restraint layer 39 successively, and workpiece 42 is positioned at the bottom.
KD*P crystal 2 of the present invention (electric-optically Q-switched crystal) is controlled electronic pulse width by magnetic pulse compressor (mpc) and thyratron combination as discharge switch, by changing the change draw power of resonator chamber length and laser medium, regulate the laser beam that laser pulse width obtains 10ns～100ns pulse width; By the adjustable hollow laser beam systems output ring-shaped light spot that the Conical Lenses group is formed, export the annular beam of various outer diameter by the distance between the adjusting Conical Lenses 19,20; By the Digit Control Machine Tool travelling workpiece, the distance of adjusting and Conical Lenses 20 is to change the ring-shaped light spot internal diameter.
Details are as follows:
As shown in Figure 1.By KD*P crystal 2 (Solid State Laser generator, be controlled by laser generator power supply 26), polarizer 3, neodymium glass amplify rod 4 and completely reflecting mirror 1 and outgoing mirror 5 (output coupling mirror) and form many transverse mode lasers resonator, make that output mode of laser volume is big, corresponding output laser energy is just bigger.Laser instrument is controlled electronic pulse width by magnetic pulse compressor (mpc) and thyratron combination as discharge switch, by changing the draw power of resonator chamber length and laser medium, regulates the laser beam that laser pulse width obtains 10ns～100ns pulse width.Resonator output laser enters amplifier 8 by isolator 6 and beam expanding lens 7 and amplifies, continue to expand by the polarization direction polarizer 12 identical with polarizer 3 polarization directions, by 45 degree light beam circulators 13, continuation is amplified by amplifier 14, amplify to export the laser of certain energy for the second time by amplifier 14 by total reflective mirror 15 reflections, output laser alignment secondary is by 45 degree circulators 13, laser is reflected during for the second time by polarizer 12, laser light reflected is by collimator and extender mirror 17, collimator and extender mirror 17 mainly is the angle of divergence of compressing laser, improves the beam quality of laser.Laser continues to produce the loop laser hot spot by convergent lens 18, Conical Lenses 19,20.Control system 25 is regulated two external diameters of assembling the distance adjustment annular hot spot between the Conical Lenses 19 and 20 by stepper motor 22, the spacing 28 (d2) of regulating sample system 23 and Conical Lenses 20 by Digit Control Machine Tool 24 is regulated the internal diameter of ring-shaped light spot simultaneously, reaches the technological requirement of laser impact forming.After adjusting technological parameter, hollow laser beam irradiation workpiece system 23 forms processing to plate.
By the laser pulse width 10ns～100ns of ring laser output, energy 0～30J can increase laser instrument amplifier progression according to the laser impact forming technological requirement and increase laser output gross energy, light beam inner and outer diameter 2～25mm, and laser instrument is with repetition rate work.
As shown in Figure 2.Hollow laser beam 29 radiation that laser instrument sends are on workpiece system (being made up of workpiece+energy-absorbing layer+restraint layer 23), form ring-shaped light spot 30, energy-absorbing layer absorbs the loop laser energy and produces plasma and blast, explosion wave is under the restriction of restraint layer, producing powerful surge acts on the workpiece, produce large plastometric set, form the drip molding 31 of definite shape.
As shown in Figure 3.Hollow bombardment with laser beams impact forging workpiece cross section profile 32 is more more reasonable than the shape of Gaussian distribution bombardment with laser beams impact forging workpiece cross section profile 33 and the uniform bombardment with laser beams impact forging of energy workpiece cross section profile 34, by regulating laser pulse width, energy, laser parameters such as the interior external diameter of hot spot are adjusted the size of surge (the shock wave peak pressure reaches several GPa) and are distributed, can solve inhomogeneous in the laser-impact distortion, problems such as panel surface is uneven, improve the laser impact forming surface flatness of plate, realize impact forging and the precision form of complex part.
As shown in Figure 4.Because the loop laser blastic deformation is more even rationally, loop laser irradiation impact forging limit depth 37 is bigger than Gaussian distribution bombardment with laser beams impact forging limit depth 35 and the uniform bombardment with laser beams impact forging of energy limit depth 36, adopt the loop laser impact forging, can improve the laser impact forming limit of plate, give full play to the forming characteristic of material, make laser impact forming technology more perfect, use more extensive.
As shown in Figure 5.The sample system by Forming Workpiece 42 and surface thereof be sticked the flexible lamina energy-absorbing layer as: aluminum foil and adhesive tape 40 and transparent restraint layer 39 (as: flowing water or other hyaline layer) are formed.Adopt loop laser impact precision formation system, folder carries the workbench of sample system can be by the numerical control instruction to treating that impact position does three-dimensional motion.According to the impact parameter of optimizing, computer control system is selected laser pulse parameters laser pulse width, energy, the interior external diameter of hot spot etc. automatically), establishment NC procedure is used for computer control system and respectively controls executive system with control, finishes impact.Drip molding adopts respectively and slightly is washed into shape and fine-punching formation assurance.Slightly be washed into the thought that shape adopts layering to make, with the three-dimensional profile of complexity according to being resolved into by the amount of plastic deformation of impact material on a series of two-dimentional contour sectional layer 43,44 the basis, adopt impact forging successively, when impacting every layer, can rotate, move the variation that realizes impact position by making the workpiece system, also can make laser generating system 45 and ring-shaped light spot form the need impact position of adjusting device 46 on workpiece and move, these can be realized by prior art.
During concrete enforcement, laser generating system 45 also can adopt identical with the laser generator of existing formation circular light spot or rectangular light spot except can adopting the amplification converting system shown in Fig. 1.
In a word, be key of the present invention by the good impact property of loop laser hot spot, similar device or the system that utilizes the loop laser hot spot to carry out impact forging all is considered to be encompassed among the present invention in every case.
The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.
Claims (6)
1. metal plate material ring-shaped light spot laser impact forming method, adopt high-power pulsed laser, laser beam forms the hollow light beam by light path system, the hollow beam irradiation forms ring-shaped light spot on workpiece system surface, it is characterized in that: irradiation is induced shock wave at the ring-shaped light spot on workpiece system surface, produce impulsive force at workpiece, in the adjustment ring-shaped light spot, external diameter, size and the distribution to regulate impulsive force of pulse width and laser energy, uniform plastic deformation improves forming limit and the forming accuracy of plate to make workpiece produce fast, thereby realizes the shaping of workpiece effectively; Described laser instrument is controlled electronic pulse width by magnetic pulse compressor (mpc) and thyratron combination as discharge switch, by changing the draw power of resonator chamber length and laser medium, regulates the laser beam that laser pulse width obtains 10ns～100ns pulse width; Resonator output laser enters amplifier (8) by isolator (6) and beam expanding lens (7) and amplifies, continue to expand by polarization direction second polarizer (12) identical with first polarizer (3) polarization direction, by 45 degree light beam circulators (13), continue to amplify by amplifier (14), amplify to export the laser of certain energy for the second time by amplifier (14) by total reflective mirror (15) reflection, output laser alignment secondary is by 45 degree circulators (13), laser is reflected during for the second time by second polarizer (12), laser light reflected is by collimator and extender mirror (17), collimator and extender mirror (17) mainly is the angle of divergence of compressing laser, improves the beam quality of laser; Laser continues to produce the loop laser hot spot by convergent lens (18), first conscope (19) and two Conical Lenses (20); Control system (25) is regulated the external diameter of ring-shaped light spot by the distance between stepper motor (22) adjusting first Conical Lenses (19) and second Conical Lenses (20), regulate the internal diameter of ring-shaped light spot simultaneously by Digit Control Machine Tool (24) adjusting sample system (23) and the spacing of second Conical Lenses (20), reach the technological requirement of laser impact forming.
2. method according to claim 1 is characterized in that the pulse width 10ns～100ns of described high-power pulsed laser, and laser energy 0～30J adjusts pulse width and the laser energy of laser instrument, obtains rational impulsive force size and distributes.
3. a kind of metal plate material ring-shaped light spot laser impact forming method according to claim 1, the internal diameter that it is characterized in that described loop laser hot spot is 2～15mm, external diameter is 3～25mm, adjusts inside and outside footpath size and the ratio of ring-shaped light spot, obtains rational impulsive force size and distribution.
4. a kind of metal plate material ring-shaped light spot laser impact forming method according to claim 1, it is characterized in that described workpiece system is by being made up of restraint layer, energy-absorbing layer and workpiece successively, described energy-absorbing layer is the flexible lamina energy-absorbing layer, and described restraint layer is transparent restraint layer.
5. the device of the described method of claim 1, the energy adjustment that mainly comprises pulse laser, pulse-width regulated, parts such as the conversion of hollow laser and the interior external diameter adjustment of hot spot, specifically comprise laser generator power supply (26), control device (25), lathe (24), stepper motor (22), guide rail (21) and laser generating system (45), control device (25) respectively with laser generator power supply (26), stepper motor (22) and lathe (24) are electrically connected, mobile workpiece system (23) is installed on the lathe (24), it is characterized in that stepper motor (22) links to each other with slide block on the guide rail (21) by screw mandrel, slide block forms adjusting device (46) with ring-shaped light spot and links to each other, ring-shaped light spot forms adjusting device (46) mainly by convergent lens (18), first Conical Lenses (19) and second Conical Lenses (20) are formed, convergent lens (18) forms the laser input of adjusting device (46) with adjacent as the 3rd beam expanding lens (17) of laser generating system (45) output as ring-shaped light spot, described second Conical Lenses (20) links to each other with slide block (47) on the guide rail (21), it is mobile in order to regulate the external diameter of ring-shaped light spot (30) that stepper motor drives slide block (47), workpiece system (23) is installed on the lathe (24) of laser outlet side of second Conical Lenses (20), workpiece system (23) goes up adjustable and can move or rotate as the plane under the drive of lathe (23) from the distance of second Conical Lenses (20) at lathe (24), in order to regulate the internal diameter of ring-shaped light spot (30).
6. device according to claim 5, it is characterized in that described laser generating system (45) is mainly by first completely reflecting mirror (1), second speculum (15), KD*P crystal (2), first polarizer (3), first neodymium glass amplifies rod (4), second neodymium glass amplifies rod (8), the 3rd neodymium glass amplifies rod (14), outgoing mirror (5), isolator (6), first beam expanding lens (7), second beam expanding lens (9), the 3rd beam expanding lens (17), prime amplifier (8), the one 45 degree total reflective mirror (10), the 2 45 degree total reflective mirror (11), the 3 45 degree total reflective mirror (16), second polarizer (12) and 45 degree circulators (13) are formed, wherein KD*P crystal (2) work under laser generator power supply (26) control, first completely reflecting mirror (1) and first polarizer (3) lay respectively at the both sides of KD*P crystal (2), and the outlet side of first polarizer (3) is connected with first neodymium glass in turn and amplifies rod (4), outgoing mirror (5), isolator (6), first beam expanding lens (7), second neodymium glass amplifies rod (8), second beam expanding lens (9) and the one 45 degree total reflective mirror (10); The 3rd neodymium glass amplification rod (14), 45 degree circulators (13) and second polarizer (12) are connected in series successively and are placed between second speculum (15) and the 2 45 degree total reflective mirror (11), second polarizer (12) is 45 degree and installs and be close to the 2 45 degree total reflective mirror (11), and the angle of the one 45 degree total reflective mirror (10) and the 2 45 degree total reflective mirror (11) is 90 degree; The 3 45 spends the relative installation with second polarizer (12) of total reflective mirror (16), is installed in a side of the 3 45 degree total reflective mirror (16) reflected ray as the 3rd beam expanding lens (17) of laser generating system (45) output.
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| CN111272584A (en) * | 2020-03-02 | 2020-06-12 | 武汉大学 | Device and method for simulating ballistic impact and monitoring in real time by using annular pulse laser |
| CN111822578B (en) * | 2020-06-18 | 2022-02-15 | 江苏大学 | Electroplastic assisted laser impact deep drawing forming device and method |
| CN114277218A (en) * | 2021-12-24 | 2022-04-05 | 浙江工业大学 | Laser strengthening method and device for sealing surface of hub bearing |
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| CN101573205A (en) * | 2006-12-27 | 2009-11-04 | 罗伯特·博世有限公司 | Laser-beam welding device and a corresponding laser-beam welding method |
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| US6362454B1 (en) * | 1999-10-01 | 2002-03-26 | Matsushita Electric Industrial Co., Ltd. | Method for drilling circular holes with a laser beam |
| CN2496591Y (en) * | 2001-10-19 | 2002-06-26 | 江苏大学 | Laser stamping fine-forming apparatus |
| CN100457362C (en) * | 2004-01-30 | 2009-02-04 | 武汉天宇激光数控技术有限责任公司 | Laser circular cutting punching method and its device |
| CN101249588A (en) * | 2008-03-14 | 2008-08-27 | 江苏大学 | Sheet material double face precise forming method and apparatus based on laser blast wave effect |
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