CN103273194B - Micro-bending-coining automation device and method of sheet metal under indirect impact of laser - Google Patents
Micro-bending-coining automation device and method of sheet metal under indirect impact of laser Download PDFInfo
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- CN103273194B CN103273194B CN201310201827.4A CN201310201827A CN103273194B CN 103273194 B CN103273194 B CN 103273194B CN 201310201827 A CN201310201827 A CN 201310201827A CN 103273194 B CN103273194 B CN 103273194B
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Abstract
The invention discloses a micro-bending-coining automation device and method of a sheet metal under indirect impact of laser. The micro-bending-coining automation device comprises a laser generating system, an automatic forming system and a control system, wherein the laser generating system is composed of a laser controller, a laser emitter and an optical fiber, and the automatic forming system is composed of an end cap, a focusing lens cone, a machine body, a micro-bending-coining worktable, a three-coordinate moving chuck, a varying magnetic field device, a rotary table multi-position device, a restrain layer-fly piece integrated piece, a restraint layer-fly piece integrated piece storage bin and a recovery device. According to the micro-bending-coining automation device and method of the sheet metal under the indirect impact of the laser, pulse laser is used as a forming power source, energy conversion between optical energy and mechanical energy is conducted through a restraint layer-fly piece integrated piece device, and therefore automation of the micro-bending-coining technology of a fly piece loading sheet metal driven by the pulse laser is achieved. The automatic forming system is relatively independent, the machining precision is free from external interference, and personal errors are avoided. Both laser circuits and the micro-bending coining worktable are stored inside the machine body so that safety of experimental operation is improved.
Description
Technical field
The present invention relates to a kind of laser indirect and impact lower sheet metal microbend-impression automation equipment and method, belong to the advanced molding field of machine-building and automation manufacture field, espespecially MEMS (MEMS) part processing technique field.
Background technology
Along with making rapid progress of modern science and technology, what also require sci-tech product along with market keeps on improving, in fields such as such as Aero-Space, precision instrument, biologic medicals, the application of micro element is healed and is become extensive, to the demand of the miniature parts of various material all in increase, because of and promoted the exploration new to the processing technology of micro element.
Nowadays towards the micromachining technology of MEMS and technique be grow up on the basis of integrated circuit, depend on the Micrometer-Nanometer Processing Technologies such as LIGA, etching, micro-milling, fine electric spark, be subject to processing that efficiency is low, cost is high and the restriction of the problem such as contaminated environment, large batch of automated production can not be formed.Therefore, the new microsecond delay technique of attaching most importance to micro-mould forming technique obtains to be paid close attention to.
The silicon-based substrate that utilizes provided as the publication number patent that is CN 101583559A manufactures the method for micro mechanical structure, the MEMS micro element be applied in semiconductor technology can be processed, but this processing method or the application of integrated circuit technique, part material is confined to silicon, can not diversity Choice and process material, especially can not the micro element of processing metal; Publication number is that the patent of CN 2589139Y proposes a kind of Micro-EDM Machine; can be used for processing micro element; but the electrode shape used in this processing method needs to determine according to processed part shape; need special processing and consume serious wear in process, mismachining tolerance strengthens gradually; Also can find in the patent of publication number CN 101108433A, spark machined generally needs to be equipped with electrode special separately for different parts.In addition, main in this patent what propose is the preparation of micro-milling cutter, also from an angle reflect micro-Milling Process cutter manufacture not easily and cost higher.Compare with method with above all processing technologys, a kind of brand-new technique---Laser Driven Flyer Plates microsecond delay technology then has very large advantage, and precision is higher, with low cost, be easy to realize mass and automated production.The advantage of Laser Driven Flyer Plates microsecond delay technology can embody completely in patent of the present invention.
Laser Driven Flyer Plates microsecond delay is the micro-metallic element forming technique of a kind of novel MEMS, namely the mode loaded by Laser Driven Flyer Plates replaces laser directly to impact, utilize Laser Driven Flyer Plates high-speed motion, laser energy is converted into the kinetic energy of film flying, the film flying of high-speed motion is as the carrier of laser energy, fly after a segment distance and collide with workpiece material, impinging interfaces produces high-pressure shocking wave, impacting with high pressure wave direction material internal is propagated, make material in minisize mould, produce ultrafast plastic deformation, thus realize the Accurate Shaping of workpiece in micro-mould.The Introduction To Cn Patent of application number 201010505869.3 application Laser Driven Flyer Plates microsecond delay technology carries out the technical process of micro-metal device stamping-out, utilizes the method for this patent can carry out mass stamping-out in pulsatile once laser, easily and effectively.But at present the device of application Laser Driven Flyer Plates microbend-stamping technique can not continuous print pulse laser driven flyer plates microbend-impression, its batch production is the shaping of multiple die under pulsatile once impacts, it is not truly mass production rapidly, continuously, again because in these apparatus and method after a laser impact forming, workpiece and fixture etc. need clamping again, will certainly human error be brought to affect machining accuracy due to manual operation thus.Further, also there is certain potential safety hazard in open laser optical path.
Summary of the invention
For the problems referred to above existed in microsecond delay technology in prior art, namely the process equipment being applied to microbend-method for stamping is relatively simple and crude, preparation method also relatively simple present situation, the invention provides a kind of new automatic production device and method, laser indirect impacts the automated production of the microbend-impression part of lower sheet metal, enhances productivity and crudy.
Technical scheme of the present invention is:
Laser indirect impacts lower sheet metal microbend-impression automation equipment, comprises laser generating system, automatic forming system and control system; Described laser generating system is made up of laser controller, generating laser and optical fiber; Described automatic forming system is made up of end cap, focusing drawtube, body, microbend-stamp work platform, three-dimensional movable chuck, base, varying magnetic field device, rotating disk multistation device, restraint layer-film flying integration slice, restraint layer-film flying integration slice warehouse apparatus, restraint layer-film flying integration slice retracting device; Described control system is made up of computer, laser controller, three-dimensional mobile platform controller and stepper motor driver.
Described control system cooperation control laser generating system and automatic forming system modules; Described laser controller is connected with nano laser with computer respectively; Described optical fiber connects the generating laser of laser generating system and the end cap of automatic forming system respectively; In automatic forming internal system, end cap is fixedly connected with focusing drawtube; Focusing drawtube is fixedly connected with body; Body is fixedly connected with base; Accept microbend-stamp work platform on described base, below base, also connect varying magnetic field device; Described three-dimensional movable chuck connects firmly three-dimensional mobile platform by optical axis, and three-dimensional mobile platform is connected with three-dimensional mobile platform controller; Described rotating disk multistation device by rotating disk at restraint layer-film flying integration slice warehouse apparatus, transmit restraint layer-film flying integration slice between restraint layer-film flying integration slice retracting device and microbend-stamp work platform, and the power transmission shaft of rotating disk multistation device is by driving stepper motor, connect stepper motor driver; Described computer is connected with laser controller, stepper motor driver, three-dimensional mobile platform controller and varying magnetic field device respectively.
Further, described restraint layer-film flying integration slice by chase, restraint layer and film flying three part form; Film flying is fitted in the centre position of restraint layer, and restraint layer embeds among chase, and restraint layer does not fit the one side of film flying towards chase, and the degree of depth that restraint layer embeds chase is less than the thickness of restraint layer.
Further, described varying magnetic field device is made up of coil, bracing frame, current controller and power interface; Computer connects current controller, controls break-make and the power of electric current, thus makes coil produce controllable magnetic field; Magnetic fields produces the downward magnetic force in direction in the chase of restraint layer-film flying integration slice, and described magnetic force serves as the pressure-pad-force in the microbend-imprint process of the lower sheet metal of laser indirect impact.
Further, described microbend-stamp work platform by mould pad block, microbend-impressing mould, fly die cavity, elastomer and fly die cavity guide rail to form; Mould pad block is fixedly mounted on base central authorities; Microbend-impressing mould is fixedly mounted on mould pad block central authorities; Fly die cavity guide rails assembling in mould pad block side, it be equipped with elastomer and fly die cavity; The one end flying die cavity, with draw-in groove, is arranged among guide rail; Elastomer is arranged on the bottom flying to fly die cavity draw-in groove in die cavity guide rail.
Further, the thickness of described mould pad block is 1 ㎜-10 ㎜, and used aloned or multiple superposition use together; Fly die cavity thickness to determine according to required technological parameter, fly die cavity and there is rigidity; Flying die cavity lumen pore can be rectangle or circle.
Further, described microbend-impressing mould is of a size of 20 ㎜ × 10, ㎜ × 30 ㎜ rectangular structure, and there is the micro-feature structure for being shaped its upper face center position, and namely utilizes micro-eletroforming to go out microbend-embossing male die; Microbend-impressing mould is anchored on mould pad block; Microbend-impressing mould central authorities punch both sides to distribute two rectangular slots according to Central Symmetry, sectional dimension 2 ㎜ × 6 ㎜, groove depth 3 ㎜, in order to install demoulding elastomer, punch height is determined according to part feature, and punch lower edges all has round-corner transition, knuckle radius is determined according to technological parameter, after demoulding elastomer is used for pressure-pad-force unloading, eject workpiece metal sheet material to reach the effect of the demoulding, its length direction is consistent with workpiece movable direction.
Laser indirect impacts lower sheet metal automation microbend-method for stamping, specifically comprises the steps:
A, with optical fiber, laser is imported described automatic forming system from generating laser;
B, utilize focusing drawtube adjusting process parameter defocusing amount;
C, restraint layer-film flying integration slice warehouse apparatus saving has tens of pieces of restraint layers-film flying integration slice; In each work step, rotating disk multistation device takes out one piece of restraint layer-film flying integration slice at the first station from restraint layer-film flying integration slice warehouse apparatus, second station is restraint layer-film flying integration slice deposit station, and one piece of restraint layer-film flying integration slice is also delivered to the upper position of microbend-stamp work platform by the 3rd station simultaneously; After completing a laser indirect and impacting the microbend-moulding process of lower sheet metal, rotating disk rotates under the driving of stepper motor, change new one piece of restraint layer-film flying integration slice, restraint layer-film flying the integration slice used is sent in restraint layer-film flying integration slice retracting device by the 4th station simultaneously, so completes four station transmission of restraint layer-film flying integration slice;
D, when upgrade restraint layer-film flying integration slice be positioned at the 3rd station of rotating disk multistation device time, computer controls varying magnetic field device and produces magnetic field, magnetic attraction force is produced to the chase part of restraint layer-film flying integration slice, thus restraint layer-film flying integration slice is compressed downwards, the pressure-pad-force under namely providing laser indirect to impact in sheet metal microbend-imprint process;
E, laser project the centre position of restraint layer-film flying integration slice by focusing drawtube, then complete microbend-imprint process process that laser indirect impacts lower sheet metal;
F, complete a microbend-impression after, computer controls varying magnetic field device and cuts out magnetic fields, thus unloading pressure-pad-force; Rotating disk multistation device turns to next station; Three-dimensional movable chuck holds plate workpiece and realizes feeding.Whole automation process, by computer cooperation control, enters next microbend-imprinting cycles thus.
The invention has the beneficial effects as follows:
The present invention adopts pulse laser as shaping power source, the Conversion of Energy of luminous energy and mechanical energy is carried out by restraint layer-film flying integration slice device, and adopt a series of reliable method to achieve the automation of the microbend-imprint process of pulse laser driven flyer plates loading thin plate, the metal microbend-high efficiency of impression part, production in enormous quantities can be carried out thus; Automatic forming system is relatively independent, and machining accuracy is not by external disturbance, and such as, by the Accuracy of three-dimensional mobile platform, overall process is coordinated to avoid human error by control system; Laser optical path and microbend-stamp work platform are all accommodated within body, improve the security of experimental implementation.
Accompanying drawing explanation
Fig. 1 is the structural representation that laser indirect of the present invention impacts lower sheet metal microbend-impression automation equipment;
Fig. 2 is the structural representation of restraint layer-film flying integration slice;
Fig. 3 is the cross-sectional view of restraint layer-film flying integration slice along A-A line in Fig. 2;
Fig. 4 is the structural representation of rotating disk multistation device;
Fig. 5 is the plane structure chart of varying magnetic field device;
Fig. 6 is the structural representation of microbend-stamp work platform;
Fig. 7 is microbend-impressing mould cross-sectional view;
Fig. 8 is the three-dimensional structure diagram of microbend-impressing mould;
Fig. 9 is microbend part structural representation;
Figure 10 is minute-pressure printed document structural representation.
In figure: 1, varying magnetic field device; 2, base; 3, three-dimensional movable chuck; 4, microbend-stamp work platform; 5, body; 6, focusing drawtube; 7, end cap; 8, optical fiber; 9, generating laser; 10, laser controller; 11, computer; 12, stepper motor driver; 13, three-dimensional mobile platform controller; 14, restraint layer-film flying integration slice warehouse apparatus; 15, restraint layer-film flying integration slice; 16, restraint layer-film flying integration slice retracting device; 17, rotating disk multistation device; 18, optical axis; 19, chase; 20, restraint layer; 21, film flying; 22, coil; 23, bracing frame; 24, current controller; 25, power interface; 26, mould pad block; 27, microbend-impressing mould; 28, die cavity is flown; 29, elastomer; 30, die cavity guide rail is flown; 31, demoulding elastomer; 32, the first station; 33, the second station; 34, the 3rd station; 35, the 4th station.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Laser indirect of the present invention impacts the structure of lower sheet metal microbend-impression automation equipment as shown in Figure 1, comprises laser generating system, automatic forming system and control system.
Laser generating system is made up of laser controller 10, generating laser 9 and optical fiber 8; Described automatic forming system is made up of end cap 7, focusing drawtube 6, body 5, microbend-stamp work platform 4, three-dimensional movable chuck 3, base 2, varying magnetic field device 1, rotating disk multistation device 17, restraint layer-film flying integration slice 15, restraint layer-film flying integration slice warehouse apparatus 14, restraint layer-film flying integration slice retracting device 16; Described control system is made up of computer 11, laser controller 10, three-dimensional mobile platform controller 13 and stepper motor driver 12.
Control system cooperation control laser generating system and automatic forming system modules; Laser controller 10 is connected with nano laser 9 with computer 11 respectively; Optical fiber 8 connects the generating laser 9 of laser generating system and the end cap 7 of automatic forming system respectively; In automatic forming internal system, end cap 7 connects focusing drawtube 6(built-in lens), use straight pin to locate between end face; Focusing drawtube 6 connects body 5 again, utilizes guide pin bushing to locate between focusing drawtube and casing; Body 5 connects base 2, and contact surface utilizes straight pin to locate; Accept microbend-stamp work platform on base 2, base 2 also connects varying magnetic field device 1 below; Three-dimensional movable chuck 3 connects firmly three-dimensional mobile platform by optical axis 18, and platform is connected with three-dimensional mobile platform controller 13, thus realizes the feeding of workpiece; The structure of rotating disk multistation device 17 as shown in Figure 4, by rotating disk at restraint layer-film flying integration slice warehouse apparatus 14, restraint layer-transmit restraint layer-film flying integration slice 15 between film flying integration slice retracting device 16 and microbend-stamp work platform 4, and the power transmission shaft of rotating disk multistation device 17 is by driving stepper motor, connect stepper motor driver 12; Computer 11 is connected with laser controller 10, stepper motor driver 12, three-dimensional mobile platform controller 13 and varying magnetic field device 1 respectively, thus achieves the automation cooperation control of Laser emission, the transmission of restraint layer-film flying integration slice, workpiece feeding and magnetic force pressure-pad-force.
For generation of the restraint layer-film flying integration slice device of pressure-pad-force (coordinate with varying magnetic field device) structure as shown in Figures 2 and 3, be made up of chase 19, K9 glass restraint layer 21 and film flying 20 3 part.Film flying 20 is fitted in the centre position of K9 glass restraint layer 21, K9 glass restraint layer 21 embeds among chase 19, K9 glass restraint layer 21 does not fit the one side of film flying 20 towards chase, and the degree of depth that K9 glass restraint layer 21 embeds chase 19 is 1 millimeter, is less than the thickness of K9 glass restraint layer 21.
The structure realizing the varying magnetic field device 1 of kiss gating-feeder (fiting constraint layer-film flying integration slice) for generation of controllable magnetic field as shown in Figure 5, is made up of coil 22, bracing frame 23, current controller 24 and power interface 25.Computer 11 connects current controller 21, controls break-make and the power of electric current, thus makes coil produce controllable magnetic field.Magnetic fields produces the downward magnetic force in direction in the chase 19 of restraint layer-film flying integration slice 15, and this magnetic force serves as the pressure-pad-force in the microbend-imprint process of the lower sheet metal of laser indirect impact, finally achieves the Automated condtrol to pressure-pad-force.
For the microbend-stamp work platform 4 of processing metal thin plate structure as shown in Figure 6, by mould pad block 26, microbend-impressing mould 27, fly die cavity 28, elastomer 29 and fly die cavity guide rail 30 to form.Mould pad block 26 is arranged on base 2 central authorities, utilizes bolt connection, taper bolt location; Microbend-impressing mould 27 is arranged on mould pad block 26 central authorities, with the fastening relative position of dog screw; Flying die cavity guide rail 30 utilizes screw to be installed on mould pad block 26 side, it is equipped with elastomer 29 and flies die cavity 28; Fly die cavity 28 one end with draw-in groove, be arranged among guide rail; Elastomer 29 is arranged on the bottom flying to fly die cavity 28 draw-in groove in die cavity guide rail 30.In whole device, connecting surface all has very high flatness, wherein mould pad block 26 specification can have different thickness, is specially between 1 ㎜-10 ㎜, can multiple superposition use together, the lower surface of grinding, polishing mould pad block can finely tune the levelness of workbench.The dimensions of microbend-impressing mould 27 is: 20 ㎜ × 10, ㎜ × 30 ㎜, and upper face center is processed with micrometer-class, for being shaped.Fly die cavity 28 thickness and determine that according to required technological parameter general about 0.1 ㎜ flies die cavity and need have certain rigidity.Flying die cavity lumen pore can be rectangle or circle, is of a size of diameter 3.5 about ㎜.Load in the process of pressure-pad-force at magnetic force, restraint layer-film flying integration slice 15 is downward by Magnetic force tracting, will fly die cavity 28, Work-sheet pressing successively on microbend-impressing mould 27.After a laser pulse, magnetic force unloads, and elastomer 29 impels and flies die cavity 28 and restraint layer-film flying integration slice 15 is upwards replied, and workpiece feeding again under three-dimensional movable chuck 3 advances, prepares next forming period.
The structure of microbend-impressing mould 27 as shown in Figure 7 and Figure 8, is of a size of 20 ㎜ × 10, ㎜ × 30 ㎜ rectangular structure, and there is the micro-feature (micron order) for being shaped upper face center position: utilize micro-eletroforming to go out punch feature; Upper surface diagonal is processed with two screwed holes, by dog screw, microbend-impressing mould 27 is fastened on mould pad block 26; Micro-mould central authorities punch both sides to distribute two rectangular slots according to Central Symmetry, and sectional dimension 2 ㎜ × 6 ㎜, groove depth 3 ㎜, in order to install demoulding elastomer 31.Punch height about 0.1 about ㎜, according to part demand determination feature; Punch lower edges all has round-corner transition, and knuckle radius is determined according to technological parameter.Demoulding elastomer 31 is for after pressure-pad-force (magnetic force) unloading, and eject workpiece metal sheet material to reach the effect of the demoulding, its length direction is consistent with workpiece movable direction, moves can not hinder formed features.When sheet metal thickness thicker (300 μm-600 μm) time, use this device can reach impression effect; When sheet metal thickness thinner (about 200 μm), this device is used to reach bending effect.
Laser indirect of the present invention impacts lower sheet metal automation microbend-method for stamping, specifically comprises the steps:
A, with optical fiber 8, laser is imported described automatic forming system from generating laser 9;
B, utilize focusing drawtube 6 adjusting process parameter defocusing amount;
C, restraint layer-film flying integration slice warehouse apparatus 14 saving has tens of pieces of restraint layers-film flying integration slice 15; In each work step, rotating disk multistation device 17 takes out one piece of restraint layer-film flying integration slice 15 at the first station 32 from restraint layer-film flying integration slice warehouse apparatus 14, second station 33 is restraint layer-film flying integration slice deposit station, and one piece of restraint layer-film flying integration slice 15 is also delivered to the upper position of microbend-stamp work platform 4 by the 3rd station 34 simultaneously; After completing a laser indirect and impacting the microbend-moulding process of lower sheet metal, rotating disk is 17 rotations under the driving of stepper motor, change new one piece of restraint layer-film flying integration slice 15, the restraint layer used-film flying integration slice 15 is sent in restraint layer-film flying integration slice retracting device 16 by the 4th station 35 simultaneously, so completes four station transmission of restraint layer-film flying integration slice 15; Wherein, the operating position of the first station 30, second station 31, the 3rd station 32, the 4th station 33 difference corresponding restraint layer-film flying integration slice warehouse apparatus, deposit station, microbend-stamp work platform, restraint layer-film flying integration slice retracting device;
D, when upgrade restraint layer-film flying integration slice 15 be positioned at the 3rd station 34 of rotating disk multistation device 17 time, computer 11 controls varying magnetic field device 1 and produces magnetic field, magnetic attraction force is produced to the chase part of restraint layer-film flying integration slice 15, thus restraint layer-film flying integration slice 15 is compressed downwards, the pressure-pad-force under namely providing laser indirect to impact in sheet metal microbend-imprint process;
E, laser project the centre position of restraint layer-film flying integration slice 15 by focusing drawtube 6, then complete microbend-imprint process process that laser indirect impacts lower sheet metal;
F, complete a stamping-out after, computer 11 controls varying magnetic field device 1 and cuts out magnetic fields, thus unloading pressure-pad-force; Rotating disk multistation device 17 turns to next station; Three-dimensional movable chuck 3 holds plate workpiece and realizes feeding.Whole automation process, by computer 11 cooperation control, enters next microbend-imprinting cycles thus.
In the apparatus, computer 11 belongs to man-machine interaction window, the whole control overflow of whole production and processing to be inputted in the middle of computer by operator and preserves, computer 11 is connected to again laser controller 10, three-dimensional mobile platform controller 13, stepper motor driver 12 and varying magnetic field device 1 respectively, defines the control system of this device.Wherein laser controller 10 controls generating laser 9 pairs of laser parameters and adjusts; Three-dimensional mobile platform controller 13 controls the movement of Workpiece clamping head 3, thus realizes the feeding of plate workpiece; Stepper motor in stepper motor driver 12 difference connection constraints layer-film flying integration slice warehouse apparatus 14, restraint layer-film flying integration slice retracting device 16 and rotating disk multistation device 17, drives corresponding component to realize automation; Varying magnetic field device 1 is directly connected with computer 11, is controlled the break-make of electromagnet coil current by computer 11, thus realizes producing magnetic field and the control removing magnetic field.
First, install microbend-stamp work platform according to production requirement, microbend-stamp work platform uses different moulds according to the difference of selected microbend-imprint process, and at the added dress flight cavity of mould.The plate Workpiece clamping head 3 connected firmly on three-dimensional mobile platform clamps workpiece, and completes plate feeding before laser-impact each time;
Then, restraint layer-film flying integration slice 15 by rotating disk multistation device 17 at restraint layer-film flying integration slice warehouse apparatus 14, transmit between microbend-stamp work platform 4 and restraint layer-film flying integration slice retracting device 16 3 parts, rotating disk multistation device has four stations, restraint layer-film flying integration slice warehouse apparatus, microbend-stamp work platform and restraint layer-film flying integration slice retracting device impact at pulse laser the position that the moment is in a station respectively, and the restraint layer-film flying integration slice on it completes respectively and gets sheet, the process of switched laser energy and recovery, another one station is between restraint layer-film flying integration slice warehouse apparatus and microbend-stamp work platform station, restraint layer on it-film flying integration slice will enter microbend-stamp work platform position in next process-cycle transfer.
Simultaneously, controlled to produce magnetic field by varying magnetic field device 1, magnetic field produces downward graviational interaction to the integrated chase of restraint layer-film flying 19, thus compresses restraint layer-film flying integration slice, flight cavity, plate workpiece and microbend-impressing mould successively, also namely loads pressure-pad-force.
Again, laser introduces automation formation system by optical fiber from laser generator 9.In automation formation system, laser is injected by top end cap 7, after the lens focus of focusing drawtube 6, project the middle position of the restraint layer-film flying integration slice 15 on microbend-stamp work platform, namely K9 glass restraint layer 21 is not fitted the centre position of the film flying side;
Finally, pulse laser impacts film flying, Conversion of Energy, and film flying clashes into sheet metal and complete once-forming process together with microbend-impressing mould.When sheet metal thickness thicker (300 μm-600 μm) time, use this device can reach impression effect; When sheet metal thickness thinner (about 200 μm), this device is used to reach bending effect.
After pulsatile once laser-impact, varying magnetic field device removes magnetic fields, is also just unloaded by pressure-pad-force; Then rotating disk multistation device rotates and replaces restraint layer-film flying integration slice, and the plate chuck connecting three-dimensional mobile platform has moved plate feeding, and system enters the state in next pulse laser-impact cycle of awaiting orders.
The present invention achieves the automation that laser indirect impacts lower sheet metal microbend-imprint process first, propose and utilize magnetic force to impact the pressure-pad-force of restraint layer in lower sheet metal microbend-imprint process, by realizing pressure-pad-force automation compression and decompression to the control of electromagnet as laser indirect; In addition, laser optical path and microbend-stamp work platform are all accommodated within body, not only improved the security of experimental implementation but also made light path in technique the assembly precision of positivity by formation system itself is determined, having avoided the interference by external factor, having made to repeat precisely quick simultaneously.This device is made up of laser generating system, automatic forming system and control system three part.Laser generating system exports pulse laser, and through coupling fiber input automatic forming system, scioptics focus on microbend-stamp work platform then; By focusing drawtube fine adjustment lens vertical direction position thus realize control to defocusing amount; Clamp workpiece band by the clamping device connected firmly on three-dimensional mobile platform and realize workpiece feeding; The replacement of restraint layer-film flying integration slice is realized by rotating disk multistation device and restraint layer-film flying integration slice warehouse, retracting device; By varying magnetic field device controlling magnetic field generation whether, magnetic field produces pressure-pad-force to the sucking action of restraint layer-film flying integration slice chase.By the action of the driving of the transmitting of computer cooperation control pulse laser, three-dimensional mobile platform, the rotation of rotating disk multistation device, the change in magnetic field and restraint layer-film flying integration slice warehouse, retracting device in whole process.This device can be used for quick, the mass production of microbend-impression part.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. laser indirect impacts lower sheet metal microbend-impression automation equipment, it is characterized in that: comprise laser generating system, automatic forming system and control system; Described laser generating system is made up of laser controller (10), generating laser (9) and optical fiber (8); Described automatic forming system is made up of end cap (7), focusing drawtube (6), body (5), microbend-stamp work platform (4), three-dimensional movable chuck (3), base (2), varying magnetic field device (1), rotating disk multistation device (17), restraint layer-film flying integration slice (15), restraint layer-film flying integration slice warehouse apparatus (14), restraint layer-film flying integration slice retracting device (16); Described control system is made up of computer (11), laser controller (10), three-dimensional mobile platform controller (13) and stepper motor driver (12);
Described control system cooperation control laser generating system and automatic forming system modules; Described laser controller (10) is connected with generating laser (9) with computer (11) respectively; Described optical fiber (8) connects the generating laser (9) of laser generating system and the end cap (7) of automatic forming system respectively; In automatic forming internal system, end cap (7) is fixedly connected with focusing drawtube (6); Focusing drawtube (6) is fixedly connected with body (5); Body (5) is fixedly connected with base (2); Accept microbend-stamp work platform on described base (2), base (2) also connects varying magnetic field device (1) below; Described three-dimensional movable chuck (3) connects firmly three-dimensional mobile platform by optical axis (18), and three-dimensional mobile platform is connected with three-dimensional mobile platform controller (13); Described rotating disk multistation device (17) by rotating disk at restraint layer-film flying integration slice warehouse apparatus (14), transmit restraint layer-film flying integration slice (15) between restraint layer-film flying integration slice retracting device (16) and microbend-stamp work platform (4), and the power transmission shaft of rotating disk multistation device (17) is by driving stepper motor, connect stepper motor driver (12); Described computer (11) is connected with laser controller (10), stepper motor driver (12), three-dimensional mobile platform controller (13) and varying magnetic field device (1) respectively.
2. laser indirect according to claim 1 impacts lower sheet metal microbend-impression automation equipment, it is characterized in that: described restraint layer-film flying integration slice is made up of chase (19), restraint layer (21) and film flying (20) three part; Film flying (20) is fitted in the centre position of restraint layer (21), restraint layer (21) embeds among chase (19), restraint layer (21) does not fit the one side of film flying (20) towards chase, and the degree of depth that restraint layer (21) embeds chase (19) is less than the thickness of restraint layer (21).
3. laser indirect according to claim 1 impacts lower sheet metal microbend-impression automation equipment, it is characterized in that: described varying magnetic field device (1) is made up of coil (22), bracing frame (23), current controller (24) and power interface (25); Computer (11) connects current controller (24), controls break-make and the power of electric current, thus makes coil produce controllable magnetic field; Magnetic fields produces the downward magnetic force in direction in the chase (19) of restraint layer-film flying integration slice (15), and described magnetic force serves as the pressure-pad-force in the microbend-imprint process of the lower sheet metal of laser indirect impact.
4. laser indirect according to claim 1 impacts lower sheet metal microbend-impression automation equipment, it is characterized in that: described microbend-stamp work platform (4) by mould pad block (26), microbend-impressing mould (27), fly die cavity (28), elastomer (29) and fly die cavity guide rail (30) to form; Mould pad block (26) is fixedly mounted on base (2) central authorities; Microbend-impressing mould (27) is fixedly mounted on mould pad block (26) central authorities; Fly die cavity guide rail (30) and be installed on mould pad block (26) side, it be equipped with elastomer (29) and fly die cavity (28); The one end flying die cavity (28), with draw-in groove, is arranged among guide rail; Elastomer (29) is arranged on the bottom flying to fly die cavity (28) draw-in groove in die cavity guide rail (30).
5. laser indirect according to claim 4 impacts lower sheet metal microbend-impression automation equipment, and it is characterized in that: the thickness of described mould pad block (26) is 1 ㎜-10 ㎜, used aloned or multiple superposition use together; Fly die cavity (28) thickness to determine according to required technological parameter, fly die cavity and there is rigidity; Flying die cavity lumen pore can be rectangle or circle.
6. the laser indirect according to claim 4 or 5 impacts lower sheet metal microbend-impression automation equipment, it is characterized in that: described microbend-impressing mould (27) is of a size of 20 ㎜ × 10, ㎜ × 30 ㎜ rectangular structure, there is the micro-feature structure for being shaped its upper face center position, and namely utilizes micro-eletroforming to go out microbend-embossing male die; Microbend-impressing mould (27) is anchored on mould pad block (26); The central punch both sides of microbend-impressing mould (27) to distribute two rectangular slots according to Central Symmetry, sectional dimension 2 ㎜ × 6 ㎜, groove depth 3 ㎜, in order to install demoulding elastomer (31), punch height is determined according to part feature, and punch lower edges all has round-corner transition, knuckle radius is determined according to technological parameter, demoulding elastomer (31) is for after pressure-pad-force unloading, and eject workpiece metal sheet material to reach the effect of the demoulding, its length direction is consistent with workpiece movable direction.
7. laser indirect impacts lower sheet metal automation microbend-method for stamping, specifically comprises the steps:
Laser is imported described automatic forming system by A, use optical fiber (8) from generating laser (9);
B, utilize focusing drawtube (6) adjusting process parameter defocusing amount;
C, restraint layer-film flying integration slice warehouse apparatus (14) saving has tens of pieces of restraint layers-film flying integration slice (15); In each work step, rotating disk multistation device (17) takes out one piece of restraint layer-film flying integration slice (15) at the first station (32) from restraint layer-film flying integration slice warehouse apparatus (14), second station (33) is restraint layer-film flying integration slice deposit station, and one piece of restraint layer-film flying integration slice (15) is also delivered to the upper position of microbend-stamp work platform (4) by the 3rd station (34) simultaneously; After completing a laser indirect and impacting the microbend-moulding process of lower sheet metal, rotating disk rotates under the driving of stepper motor, change one piece of new restraint layer-film flying integration slice (15), restraint layer-film flying the integration slice (15) used is sent in restraint layer-film flying integration slice retracting device (16) by the 4th station (35) simultaneously, so completes four station transmission of restraint layer-film flying integration slice (15);
D, when upgrade restraint layer-film flying integration slice (15) be positioned at the 3rd station (34) of rotating disk multistation device (17) time, computer (11) controls varying magnetic field device (1) and produces magnetic field, magnetic attraction force is produced to the chase part of restraint layer-film flying integration slice (15), thus restraint layer-film flying integration slice (15) is compressed downwards, the pressure-pad-force under namely providing laser indirect to impact in sheet metal microbend-imprint process;
E, laser project the centre position of restraint layer-film flying integration slice (15) by focusing drawtube (6), then complete microbend-imprint process process that laser indirect impacts lower sheet metal;
F, complete a microbend-impression after, computer (11) control varying magnetic field device (1) close magnetic fields, thus unloading pressure-pad-force; Rotating disk multistation device (17) turns to next station; Three-dimensional movable chuck (3) holds plate workpiece and realizes feeding; Whole automation process, by computer (11) cooperation control, enters next microbend-imprinting cycles thus.
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| CN105328338B (en) * | 2015-11-27 | 2017-07-18 | 江苏大学 | A kind of straight line multistation laser-impact connects the devices and methods therefor of sheet metal |
| CN105328337B (en) * | 2015-11-27 | 2017-03-29 | 江苏大学 | A kind of new pattern laser-impact connects the devices and methods therefor of sheet metal |
| US20220143708A1 (en) * | 2019-02-27 | 2022-05-12 | Ohio State Innovation Foundation | Additive manufacturing using a momentum transfer method |
| CN110116157A (en) * | 2019-05-30 | 2019-08-13 | 广东工业大学 | A kind of induced with laser blanking and piercing with combination tool device |
| CN110369596B (en) * | 2019-06-20 | 2021-05-18 | 广东工业大学 | Bending device based on laser-induced cavitation effect and bending method thereof |
| CN110560888B (en) * | 2019-10-23 | 2020-07-10 | 山东大学 | Method for roughening and functionalizing surface of metal material by utilizing laser shock forming technology and application thereof |
| CN112207439A (en) * | 2020-10-29 | 2021-01-12 | 常州市恒鑫电声器材厂 | Laser welding machine of continuous material loading for super capacitor |
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