CN103273195B - Micro-blanking automation device and method of sheet metal under indirect impact of laser - Google Patents

Abstract

The invention discloses an automatic micro-blanking device and method for metal sheet under indirect laser impact, the device includes a laser generating system, an automatic forming system and a control system; the laser generating device consists of a laser controller, a laser emitter and Composed of optical fibers; the automatic forming device consists of an end cap, a focusing lens barrel, a body, a micro-punching workbench, a three-coordinate moving chuck, a base, a variable magnetic field device, a multi-station turntable device, and a constrained layer-flyer integrated sheet , constraining layer-flying chip integrated chip storage bin and recovery device. The invention adopts the pulse laser as the forming power source, and the energy conversion of light energy and mechanical energy is carried out by the constrained layer-flyer integrated chip device, which realizes the automation of the micro-blanking process of the pulse laser driving the flyer to load the thin plate; the automatic forming system is relatively independent , the processing accuracy is not subject to external interference, avoiding human error; the laser optical path and micro-punching workbench are stored in the body, which improves the safety of experimental operations.

Description

Automated device and method for micro-punching metal sheet under indirect laser impact

technical field

The invention relates to a micro-blanking automatic device and method for a metal thin plate under indirect laser impact, which belongs to the field of advanced forming of mechanical manufacturing and the field of automatic processing, especially the technical field of micro-electromechanical system (MEMS) parts processing. the

Background technique

With the rapid development of modern science and technology, and with the continuous improvement of market requirements for technological products, in fields such as aerospace, precision instruments, and biomedicine, the application of micro-devices is becoming more and more extensive, and the demand for micro-components of various materials are increasing, thus promoting a new exploration of the processing technology of micro devices.

Today's MEMS-oriented micromachining technology and technology are developed on the basis of integrated circuits, mainly relying on LIGA, etching, micro-milling, micro-EDM and other micro-processing technologies, which are subject to low processing efficiency, high cost and environmental pollution. Restrictions such as problems cannot form large-scale automated production. Therefore, new micro-forming processes focusing on micro-mold forming technology have received great attention.

Just as the patent publication number CN 101583559A provides a method for manufacturing a micromechanical structure using a silicon-based substrate, MEMS microdevices used in semiconductor technology can be processed, but this processing method is still an application of integrated circuit technology, and parts materials It is limited to silicon, and it is impossible to select processing materials in a variety of ways, especially micro devices that cannot process metals; the patent with the publication number CN 2589139Y proposes a micro electric discharge machine tool, which can be used to process micro devices, but the processing method The shape of the electrode used needs to be determined according to the shape of the part to be processed, and special processing is required, and the consumption and wear are serious during the processing, and the processing error gradually increases; it can also be found in the patent of publication number CN 101108433A that EDM generally requires different parts for different parts. Equipped with their own dedicated electrodes. In addition, this patent mainly proposes the preparation of micro-milling tools, which also reflects from a perspective that the manufacture of micro-milling tools is not easy and the cost is high. Compared with the above-mentioned processing techniques and methods, a brand-new technique—laser-driven flyer microforming technology has great advantages, such as high precision, low cost, and easy realization of mass production and automatic production. The advantages of laser-driven flyer micro-forming technology can be fully reflected in the patent of this invention.

Laser-driven flyer microforming is a new MEMS micro-metal parts forming technology, that is, the laser-driven flyer loading method replaces the direct laser impact, and the laser drives the high-speed movement of the flyer to convert the laser energy into the kinetic energy of the flyer , the high-speed moving flyer is used as the carrier of laser energy. After flying for a certain distance, it collides with the workpiece material, and generates high-pressure shock waves on the collision interface. Realize the precise shaping of the workpiece in the micro-mold. The Chinese patent application number 201010505869.3 introduces the process of punching micro metal devices using laser-driven flyer microforming technology. The method of this patent can be used for batch punching in one pulse laser, which is convenient and effective. However, the current laser-driven flyer micro-blanking technology device cannot perform continuous micro-blanking of metal sheets under the indirect laser impact, and its mass production is only the formation of multiple dies under the impact of one pulse, which is not fast and continuous in the true sense. Mass production, and because the workpiece and fixtures need to be re-clamped after a laser shock forming in this device and method, it is bound to bring human errors due to manual operation and affect the processing accuracy. Moreover, the open laser light path also has certain potential safety hazards.

Contents of the invention

Aiming at the above-mentioned problems existing in the micro-forming technology in the prior art, that is, the processing equipment applied to the micro-blanking process is relatively simple and the production method is relatively simple, the present invention provides a new automatic production device and method to realize the pulse Automated production of micro-blanked parts loaded with laser-driven flying sheets to improve production efficiency and processing quality.

Technical scheme of the present invention is:

The micro-blanking automatic device of the metal sheet under the indirect laser impact includes a laser generating device, an automatic forming device and a control device; the laser generating device is composed of a laser controller, a laser transmitter and an optical fiber; the automatic forming device is composed of an end cover , focusing lens barrel, body, micro-cutting workbench, three-coordinate moving chuck, base, variable magnetic field device, turntable multi-station device, constrained layer-flying sheet integrated sheet, constrained layer-flying sheet integrated sheet storage bin, The recovery device is composed of; the control device is composed of a computer, a laser controller, a three-coordinate mobile platform controller and a stepper motor driver;

The control device coordinates and controls each module of the laser generating device and the automatic forming device; the laser controller is respectively connected with the computer and the nano-laser; the optical fiber is respectively connected with the laser emitter of the laser generating system and the end cap of the automatic forming system; Inside the automatic forming system, the end cover is fixedly connected to the focusing lens barrel; the focusing lens barrel is fixedly connected to the body; the body is fixedly connected to the base; the base is connected to the micro-punching workbench, and the magnetic field changing device is connected to the bottom of the base; The three-coordinate moving chuck is fixedly connected to the three-coordinate moving platform through the optical axis, and the platform is connected with the controller of the three-coordinate moving platform; Constraint layer-flyer integrated sheets are transferred between the blanking workbenches, and the transmission shaft of the turntable multi-station device is driven by a stepper motor and connected to the stepper motor driver; the computer is respectively connected with the laser controller, the stepper motor driver, The three-coordinate mobile platform controller is connected with the variable magnetic field device.

Further, the constraining layer-flying sheet integrated device is composed of three parts: iron frame, constraining layer and flying sheet; the flying sheet is attached to the middle position of the constraining layer, the constraining layer is embedded in the iron frame, and the constraining layer is not attached to the flying sheet. One side of the sheet faces the iron frame, and the depth of the constraining layer embedded in the iron frame is smaller than the thickness of the constraining layer.

Further, the variable magnetic field device is composed of a coil, a support frame, a current controller and a power interface; the computer is connected to the current controller to control the on-off and strength of the current, so that the coil generates a controllable magnetic field; the magnetic field acts on the constrained layer- The iron frame of the flyer-integrated sheet generates a downward magnetic force, which acts as a blank-holding force in the micro-blanking process of the metal sheet under the indirect impact of the laser.

Further, the micro-blanking workbench is composed of a mold block, a micro-blanking mold, a fly cavity, an elastic body and a fly cavity guide rail; the die block is fixedly installed in the center of the base; the micro-blanking die is fixedly installed on the die pad The center of the block; the fly cavity guide rail is installed on one side of the mold pad, and the elastic body and the fly cavity are installed on it; one end of the fly cavity has a card slot, which is installed in the guide rail; the elastic body is installed on the fly cavity guide rail The lower part of the slot in the fly cavity.

Further, the thickness of the mold block is 1mm-10mm, and it can be used singly or in multiple stacks; the thickness of the fly cavity is determined according to the required process parameters, and the fly cavity has rigidity; the hole of the fly cavity can be rectangular or round.

Further, the size of the micro-blanking mold is 20mm×30mm×10mm, and it is in the shape of an inverted "concave". There is a micro-feature structure for forming at the center of the upper surface, that is, the micro-punching concave mold is processed by picosecond laser hole; two threaded holes are processed on the diagonal of the upper surface of the mold, and the micro-blanking mold is fastened on the mold pad; the shape of the die hole is determined according to the shape of the part to be processed, the aperture is narrow at the top and wide at the bottom, and The length of the hole is short; the cross-sectional size of the groove of the micro-punching die is 7mm×10mm.

An automatic micro-punching method for metal sheets under indirect laser impact, specifically comprising the following steps:

A. Use optical fiber to guide the laser from the laser transmitter into the automatic forming system;

B. Use the focusing lens barrel to adjust the defocus amount of the process parameters;

C. Constraining layer-flying sheet integrated chip storage bin device stores dozens of constrained layer-flying sheet integrated chips; Take out a constrained layer-flyer integrated sheet from the storage bin device, the second station is the constrained layer-flyer integrated sheet reserve station, and the third station also transports a constrained layer-flyer integrated sheet to the micro blanking The upper position of the workbench; when the micro-blanking process of the metal sheet under the indirect impact of the laser is completed, the turntable rotates under the drive of the stepping motor, and a new constrained layer-flying sheet integrated sheet is replaced, while the fourth station Send the used constrained layer-flyer integrated sheet into the constrained layer-flyer integrated sheet recovery device, thus completing the four-station transmission of the constrained layer-flyer integrated sheet;

D. When the updated constrained layer-flyer integrated sheet is located in the third station of the turntable multi-position device, the computer controls the variable magnetic field device to generate a magnetic field, which generates a magnetic field attraction to the iron frame of the constrained layer-flyer integrated sheet, thereby Make the constrained layer-flyer integrated sheet pressed down, that is, provide the blank-holding force in the micro-blanking process of the metal sheet under the indirect impact of the laser;

E. The laser is projected to the middle position of the constrained layer-flyer integrated sheet through the focusing lens barrel, and then the micro-punching process of the metal sheet under the indirect impact of the laser is completed.

F. After a blanking is completed, the computer controls the variable magnetic field device to close the magnetic field, thereby unloading the blank holder force; the turntable multi-station device rotates to the next station; the three-coordinate moving chuck clamps the sheet metal workpiece to realize feeding; The entire automation process is coordinated and controlled by a computer, thus entering the next micro-blanking cycle.

The beneficial effects of the present invention are:

The invention adopts pulsed laser as the forming power source, converts light energy and mechanical energy by the constrained layer-flyer integrated chip device, and adopts a series of reliable methods to realize the automation of the micro-blanking process of the pulsed laser-driven flyer loaded thin plate , so that high-efficiency and mass production of metal micro-punching parts can be carried out; the automatic forming system is relatively independent, the processing accuracy is not subject to external interference, and the whole process is coordinated by the control system to avoid human errors; the laser optical path and the micro-punching workbench All are stored in the body, which improves the safety of the experimental operation. the

Description of drawings

Fig. 1 is the structure schematic diagram of the micro-punching automatic device of the metal sheet under the indirect laser impact of the present invention;

Fig. 2 is a structural schematic diagram of a constrained layer-flying sheet integrated sheet;

Fig. 3 is a schematic diagram of the cross-sectional structure of the constrained layer-flying chip integrated sheet along the line A-A in Fig. 2;

Fig. 4 is a structural schematic diagram of a turntable multi-station device;

Fig. 5 is the plane structural diagram of variable magnetic field device;

Fig. 6 is a structural schematic diagram of a micro-punching workbench;

Fig. 7 is a schematic diagram of a cross-sectional structure of a micro-blanking die;

Fig. 8 is a three-dimensional structure diagram of a micro-blanking die;

Fig. 9 is a schematic diagram of a micro-punching piece. the

In the figure: 1. Variable magnetic field device; 2. Base; 3. Three-coordinate moving chuck; 4. Micro-punching table; 5. Body; 6. Focusing lens barrel; 7. End cover; 8. Optical fiber; 9 1. Laser transmitter; 10. Laser controller; 11. Computer; 12. Stepper motor driver; 13. Three-coordinate mobile platform controller; Chip integrated chip; 16. Constrained layer-flying chip integrated chip recovery device; 17. Turntable multi-position device; 18. Optical axis; 19. Iron frame; 20. Constrained layer; 21. Flying chip; 22. Coil; 23. Support frame; 24. Current controller; 25. Power interface; 26. Die pad; 27. Micro blanking die; 28. Flying cavity; 29. Elastomer; 30. Flying cavity guide rail; 31. The first process 32, the second station; 33, the third station; 34, the fourth station.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The structure of the automatic device for micro-punching of thin metal plates under the indirect laser impact of the present invention is shown in Figure 1, including a laser generating device, an automatic forming device and a control device.

The laser generating device is composed of a laser controller 10, a laser transmitter 9 and an optical fiber 8; the automatic forming device is composed of an end cover 7, a focusing lens barrel 6, a body 5, a micro-punching workbench 4, a three-coordinate moving chuck 3, and a base 2. The variable magnetic field device 1, the turntable multi-position device 17, the constrained layer-flying sheet integrated sheet 15, the constrained layer-flying sheet integrated sheet storage bin 14, and the recovery device 16; the control device is composed of a computer 11, a laser controller 10, The three-coordinate mobile platform controller 13 and the stepper motor driver 12 are composed.

The control device coordinates and controls each module of the laser generating system and the automatic forming system; the laser controller 10 is connected to the computer 11 and the nano laser 9 respectively; the optical fiber 8 is connected to the laser transmitter 9 of the laser generating system and the automatic forming system respectively. End cap 7; inside the automatic forming device, the end cap 7 is connected to the focusing lens barrel 6 (built-in lens), and cylindrical pins are used for positioning between the end faces; the focusing lens barrel 6 is connected to the body 5, and the distance between the focusing lens barrel and the box body The guide sleeve is used for positioning; the body 5 is connected to the base 2, and the contact surface is positioned by a cylindrical pin; the base 2 is above the micro-punching workbench, and the base 2 is also connected to the variable magnetic field device 1; the three-coordinate moving chuck 3 passes through The optical axis 18 is fixedly connected with the three-coordinate mobile platform, and the platform is connected with the three-coordinate mobile platform controller 13, so as to realize the feeding of the workpiece; the structure of the turntable multi-station device 17 is shown in Figure 4. Constraint layer-flying sheet integrated sheet 15 is transported between sheet integrated sheet storage bin 14, recovery device 16 and micro-punching workbench 4, and the transmission shaft of turntable multi-station device 17 is driven by a stepper motor, connected to the stepper motor driver 12. The computer 11 is respectively connected with the laser controller 10, the stepper motor driver 12, the three-coordinate mobile platform controller 13 and the variable magnetic field device 1, thereby realizing laser emission, constrained layer-flyer integrated sheet transmission, and workpiece feeding Automatic coordination control with magnetic blank holder force.

The structure of the constrained layer-flyer integrated chip device used to generate blank holder force (with variable magnetic field device) is shown in Figure 2 and Figure 3, which consists of three parts: iron frame 19, K9 glass constrained layer 21 and flyer 20. The flyer 20 is attached to the middle of the K9 glass constraining layer 21, the K9 glass constraining layer 21 is embedded in the iron frame 19, the side of the K9 glass constraining layer 21 that is not attached to the flyer 20 faces the iron frame, and the K9 glass constraining layer 21 is embedded The depth of the iron frame 19 is about 1 mm, which is less than the thickness of the K9 glass constraining layer 21 .

The structure of the variable magnetic field device 1 used to generate a controllable magnetic field to realize blank holder force control (cooperating with the constrained layer-flyer integrated chip) is shown in Figure 5, consisting of a coil 22, a support frame 23, a current controller 24 and a power interface 25 composition. The computer 11 is connected with a current controller 21 to control the on-off and strength of the current, so that the coil generates a controllable magnetic field. The magnetic field acts on the iron frame 19 of the constrained layer-flyer integrated sheet 15 to generate a downward magnetic force, which serves as the blank-holding force in the micro-blanking process of the metal sheet under the indirect impact of the laser, and finally realizes the control of the blank-holding force automation control.

The structure of the micro-blanking workbench 4 for processing sheet metal is as shown in FIG. The mold spacer 26 is installed in the center of the base 2, and is connected by bolts and conical pins for positioning; the micro-blanking die 27 is installed in the center of the mold spacer 26, and the relative position is fastened with positioning screws; the flying cavity guide rail 30 is installed on the mold cushion with screws One side of the block 26 is equipped with an elastic body 29 and a fly cavity 28; one end of the fly cavity 28 with a slot is installed in the guide rail; the elastic body 29 is installed in the fly cavity guide rail 30 in the fly cavity 28 slot the lower part. In the whole device, the connection surface has a high flatness, and the mold cushion block 26 can have different thicknesses, specifically between 1mm-10mm, and can be used in multiple stacks to grind and polish mold cushions The lower surface of the block allows fine adjustment of the levelness of the bench. The size specification of the micro-blanking die 27 is: 20㎜×30㎜×10㎜, and the center of the upper surface is processed with micron-level features for forming. The thickness of the fly cavity 28 is determined according to the required process parameters, generally about 0.1 mm, and the fly cavity needs to have a certain rigidity. The cavity of the flying cavity can be rectangular or circular, and the size is about 3.5mm in diameter. During the process of applying the blank holder force by the magnetic force, the constrained layer-flyer integrated sheet 15 is magnetically pulled downward, and the fly cavity 28 and the workpiece are pressed against the micro-blanking die 27 in sequence. After one laser pulse, the magnetic force is unloaded, and the elastic body 29 prompts the fly cavity 28 and the constrained layer-flyer integrated sheet 15 to recover upwards, and the workpiece is fed again under the push of the three-coordinate moving chuck 3 to prepare for the next forming cycle.

The structure of the micro-blanking die 27 is shown in Figure 7 and Figure 8. Its size is 20 mm x 30 mm x 10 mm, and it is in the shape of an inverted "concave". There are micro-features (micron level) for forming in the center of the upper surface : Utilize the picosecond laser to process the micro-blanking die hole; in addition, two threaded holes are processed on the diagonal line of the upper surface of the die, and the micro-blanking die 27 is fastened on the die pad 26 by positioning screws. The shape of the die hole is determined according to the shape of the part to be processed. The hole diameter is narrow at the top and wide at the bottom, and the length of the die hole is short (about 3mm), which is convenient for collecting and blanking. The cross-sectional size of the micro-blanking die 27 grooves is 7mm×10mm. During the punching process, it can be inserted into a paper slot to collect blanks (micron level). The structure of the workpiece after micro-punching is shown in Fig. 9.

The automatic micro-blanking method of the metal sheet under the indirect laser impact of the present invention specifically comprises the following steps:

A. Use the optical fiber 8 to guide the laser light from the laser emitter 9 into the automatic forming system.

B. Use the focusing lens barrel 6 (built-in lens) to adjust the defocus amount of the process parameters.

C. The constrained layer-flying sheet integrated sheet storage bin device 14 is equipped with dozens of constrained layer-flying sheet integrated sheets 15; A constrained layer-flyer-integrated sheet 15 is taken out of the flyer-integrated-sheet storage bin 14, and the third station 33 also transports a constrained-flyer-integrated sheet 15 to the upper position of the micro-punching workbench 4. After completing a micro-blanking process of the metal sheet under the indirect impact of the laser, the turntable rotates 17 under the drive of the stepping motor, and replaces a new constrained layer-flying sheet integrated sheet 15, and the fourth station 34 will already be used. The constrained layer-flyer integrated sheet 15 is sent to the constrained layer-flyer integrated sheet recycling device 16, thus completing the four-station transmission of the constrained layer-flyer integrated sheet 15. Wherein the first station 31, the second station 32, the third station 33, and the fourth station 34 are four stations of the device, respectively corresponding to the constrained layer-flying sheet integrated sheet storage bin device, reserve station, The working position of the micro-blanking workbench and the constrained layer-flyer integrated sheet recovery device.

D. When the updated constrained layer-flying sheet integrated sheet 15 is located at the third station 33 of the turntable multi-station device 17 (on the micro-punching workbench), the computer 11 controls the variable magnetic field device 1 to generate a magnetic field, and the constrained layer -The iron frame part of the flyer integrated sheet 15 generates a magnetic field attraction, thereby making the constraining layer-the flyer integrated sheet 15 pressed downward, that is to provide the blank-holding force in the micro-blanking process of the metal sheet under the indirect impact of the laser.

E. The laser is projected to the middle position of the constrained layer-flyer integrated sheet 15 through the focusing lens barrel 6 (built-in lens), and then the micro-punching process of the metal sheet under the indirect impact of the laser is completed. After a blanking is completed, the computer 11 controls the variable magnetic field device 1 to close the magnetic field, thereby unloading the blank holder force; the turntable multi-station device 17 rotates to the next station; the three-coordinate moving chuck 3 clamps the sheet metal workpiece to realize Give. The entire automation process is coordinated and controlled by the computer 11, thus entering the next micro-blanking cycle.

In this device, the computer 11 belongs to the human-computer interaction window, and all the control requirements of the entire production and processing are input into the computer by the operator and saved. The driver 12 and the magnetic field changing device 1 form the control system of the device. Among them, the laser controller 10 controls the laser transmitter 9 to adjust the laser parameters; the three-coordinate mobile platform controller 13 controls the movement of the workpiece chuck 3, thereby realizing the feeding of the sheet metal workpiece; the stepper motor driver 12 is respectively connected to the constrained layer- The stepper motors in the flyer integrated sheet storage bin device 14, the constrained layer-flyer integrated sheet recovery device 16 and the turntable multi-station device 17 drive the corresponding parts to realize automation; the variable magnetic field device 1 is directly connected with the computer 11, and is controlled by The computer 11 controls the on-off of the electromagnet coil current, so as to realize the control of generating and releasing the magnetic field.

First, install the micro-blanking workbench according to the production requirements. The micro-blanking workbench uses different molds according to the selected micro-blanking process, and installs the flight cavity on the mold. The sheet workpiece chuck 3 fixedly connected to the three-coordinate moving platform clamps the workpiece, and completes the sheet feeding before each laser impact;

Then, the constrained layer-flyer integrated sheet 15 is divided into three parts by the rotary multi-station device 17 in the constrained layer-flyer integrated sheet storage bin device 14, the micro-punching workbench 4 and the constrained layer-flyer integrated sheet recovery device 16. The turntable multi-station device has four stations, the constrained layer-flyer integrated sheet storage device, the micro-punching workbench and the constrained layer-flyer integrated sheet recovery device are respectively in a working position at the time of pulse laser impact. position, and the constrained layer-flyer integrated sheet on it completes the process of taking the sheet, converting laser energy and recycling, and the other station is in the constrained layer-flyer integrated sheet storage device and micro-punching workbench Between the positions, the upper constraining layer-flying integrated sheet will be transferred to the position of the micro-blanking workbench in the next processing cycle. the

At the same time, a magnetic field is generated under the control of the variable magnetic field device 1, and the magnetic field exerts a downward gravitational force on the constrained layer-flyer integrated iron frame 19, thereby sequentially compressing the constrained layer-flyer integrated sheet, flight cavity, sheet metal workpiece and micro-punching Cutting die, that is, load blank holder force. the

Afterwards, the laser light is introduced into the automatic forming system by the optical fiber from the laser generator 9. In the automatic forming system, the laser light is injected from the top end cover 7, and after being focused by the lens of the focusing lens barrel 6, it is projected to the central position of the constrained layer_flyer integrated sheet 15 on the micro-punching workbench, that is, the K9 glass constrained Layer 21 is not attached to the middle of the side of the flying piece;

Finally, the pulsed laser impacts the flying piece, and the energy is converted. The flying piece hits the metal sheet and the micro-blanking die completes a forming process together.

After a pulsed laser impact, the variable magnetic field device releases the magnetic field effect, and the blank holder force is also unloaded; then the turntable multi-position device rotates to replace the constrained layer-flying sheet integrated sheet, and the sheet chuck connected to the three-coordinate mobile platform moves completely. The sheet is fed, and the system enters the state of standby for the next pulse laser shock cycle.

The invention realizes the automation of the micro-blanking process of metal sheets under indirect laser impact for the first time, and proposes to use magnetic force as the blank-holding force of the constrained layer in the micro-blanking process of metal sheets under indirect laser impact, and realizes the pressing by controlling the electromagnet. The edge force is automatically loaded and unloaded; in addition, the laser optical path and the micro-punching workbench are stored in the body, which not only improves the safety of the experimental operation, but also makes the alignment of the optical path in the process determined by the assembly accuracy of the forming system itself. It avoids interference from external factors, and at the same time makes repeated operations fast and accurate. The device consists of three parts: laser generating system, automatic forming system and control system. The laser generating system outputs pulsed laser light, which is coupled into the automatic forming system through optical fiber, and then focused on the micro-punching workbench through the lens; the vertical position of the lens is precisely adjusted by the focusing lens barrel to realize the control of the defocus amount; The clamping device connected to the three-coordinate moving platform clamps the workpiece strip to realize workpiece feeding; the replacement of the constrained layer-flying sheet integrated sheet is realized by the multi-station device of the turntable, the constraining layer-flying sheet integrated sheet storage bin, and the recovery device ; Whether the magnetic field occurs or not is controlled by the variable magnetic field device, and the magnetic field produces a blank-holding force by the attraction of the constrained layer-flyer integrated sheet iron frame. During the whole process, the computer coordinates and controls the emission of the pulsed laser, the drive of the three-coordinate moving platform, the rotation of the turntable multi-position device, the change of the magnetic field, and the action of the constrained layer-flyer integrated chip storage bin and the recovery device. The device can be used for rapid and mass production of micro-punching parts.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. laser indirect impacts micro-stamping-out automation equipment of lower sheet metal, it is characterized in that: comprise generating device of laser, automatic forming device and control device; Described generating device of laser is made up of laser controller (10), generating laser (9) and optical fiber (8); Described automatic forming device is made up of end cap (7), focusing drawtube (6), body (5), micro-stamping-out workbench (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 (14), retracting device (16); Described control device is made up of computer (11), laser controller (10), three-dimensional mobile platform controller (13) and stepper motor driver (12);

Described control device cooperation control generating device of laser and automatic forming device 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 micro-stamping-out workbench (4) 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 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 (14), transmit restraint layer-film flying integration slice (15) between retracting device (16) and micro-stamping-out workbench (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 micro-stamping-out automation equipment of lower sheet metal, it is characterized in that: described restraint layer-film flying integration slice device 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 micro-stamping-out automation equipment of lower sheet metal, 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 micro-punching process of the lower sheet metal of laser indirect impact.

4. laser indirect according to claim 1 impacts micro-stamping-out automation equipment of lower sheet metal, it is characterized in that: described micro-stamping-out workbench (4) by mould pad block (26), micro-blanking die (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; Micro-blanking die (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 micro-stamping-out automation equipment of lower sheet metal, 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 micro-stamping-out automation equipment of lower sheet metal, it is characterized in that: described micro-blanking die (27) is of a size of 20 ㎜ × 10, ㎜ × 30 ㎜, in falling " recessed " word shape, there is the micro-feature structure for being shaped upper face center position, and namely utilizes picosecond laser to process micro-punching and blanking die hole; Mould upper surface diagonal is processed with two screwed holes, micro-blanking die (25) is fastened on mould pad block (24); The shape of die hole is determined according to the part shape that will process, and aperture is up-narrow and down-wide, and the length of die hole is shorter; Micro-blanking die (27) channel section is of a size of 7 ㎜ × 10 ㎜.

7. laser indirect impacts the micro-blanking method of automation of lower sheet metal, specifically comprises the steps:

Laser is imported 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 (31) from restraint layer-film flying integration slice warehouse apparatus (14), second station (32) 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 micro-stamping-out workbench (4) by the 3rd station (33) simultaneously; After completing a laser indirect and impacting micro-blanking process of lower sheet metal, rotating disk (17) under the driving of stepper motor rotates, 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 (34) 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 (33) 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 the micro-punching process of sheet metal;

E, laser project the centre position of restraint layer-film flying integration slice (15) by focusing drawtube (6), then complete micro-punching process process that laser indirect impacts lower sheet metal;

F, complete a stamping-out 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 micro-stamping-out cycle thus.