CN103212866B - A kind of femtosecond laser of Laser Processing intravascular stent - Google Patents
A kind of femtosecond laser of Laser Processing intravascular stent Download PDFInfo
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- CN103212866B CN103212866B CN201210016807.5A CN201210016807A CN103212866B CN 103212866 B CN103212866 B CN 103212866B CN 201210016807 A CN201210016807 A CN 201210016807A CN 103212866 B CN103212866 B CN 103212866B
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Abstract
The present invention proposes a kind of femtosecond laser of Laser Processing intravascular stent, comprises femtosecond laser generator, beam expanding lens, some speculums, laser cutting head, rotating shaft, linear axis, workbench, Z axis module, column; Described column is arranged on workbench, and Z axis module is arranged on column, and linear axis is arranged on workbench; Laser cutting head comprises laser printhead, focus lamp, protective glass.First the laser beam that described femtosecond laser generator is launched expands through beam expanding lens, and after some speculum change light paths, enter the focus lamp be arranged in Z axis module focus on, the laser beam after focusing beats the surface at support tubing after protective glass.Laser cutting head is arranged in Z axis module, is realized the rectilinear motion up and down of Z axis module by servomotor, thus controls the Laser beam energy distribution of tube surfaces.The present invention assembles that accuracy is high, mechanical stability against short circuit good; Can processing metal tubing and non-metal frame tubing.
Description
Technical field
The invention belongs to laser micro-machining technology field, relate to a kind of femtosecond laser, particularly a kind of femtosecond laser of Laser Processing intravascular stent.
Background technology
Current most of intravascular stent all adopts the mode of laser cutting to process, main the continuous of infrared band or the pulse laser of adopting of traditional laser support cutting is as light source, moved along line of cut on support tubing by overlapped laser pulse or continuity point, input the auxiliary fusing cutting of hyperbaric oxygen simultaneously.
Traditional laser makes surrounding material change due to fuel factor, thus affects machining accuracy.Simultaneously, the material molten gasification of Laser Focusing point place, slag is blown out by gas, this processing method is seriously polluted, and motlten metal very easily splash, to machining support tube surfaces, have impact on crudy greatly, support tubing is the tubing of small caliber, slightly do not note in process causing overheated and ablation, need to increase high pressure assist gas and cool, add production cost.
The more important thing is that this form processing is favourable to processing metal tubing, but helpless for the degradable non-metal frame tubing of processing.
In sum, traditional Laser Processing form to environment exist pollute, crudy is poor, and precision is low easily causes overheated and ablation, can only processing metal tubing cannot machining of non-metallic support tubing.In view of this, nowadays, processing unit (plant) that precision high high in the urgent need to a kind of crudy.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency, particularly solves the problem that existing process equipment crudy is poor, precision is low.
For achieving the above object, the present invention proposes a kind of femtosecond laser of Laser Processing intravascular stent, comprising femtosecond laser generator, beam expanding lens, some speculums, laser cutting head, rotating shaft, linear axis, workbench, Z axis module, column; Described column is arranged on workbench, and Z axis module is arranged on column, and linear axis is arranged on workbench; Laser cutting head comprises laser printhead, focus lamp, protective glass.First the laser beam that described femtosecond laser generator is launched expands through beam expanding lens, and after some speculum change light paths, enter the focus lamp be arranged in Z axis module focus on, the laser beam after focusing beats the surface at support tubing after protective glass.Laser cutting head is arranged in Z axis module, the rectilinear motion up and down of Z axis module is realized by servomotor, thus control the Laser beam energy distribution of tube surfaces, simultaneously can at any time according to the change adjustment laser nozzle of laser facula and the distance of processing tube surfaces in process.Described rotating shaft clamps and drives support tubing to rotate, and rotating shaft is arranged on the dynamic plate of linear axis, can according to the automatic feed at any time of incising pipes length in laser processing procedure.
In one embodiment of the invention, described rotating shaft comprises motor, shaft coupling, worm screw, worm gear, pull bar module, shell, end cap, chuck; Described pull bar module comprises pull bar lid, piston, draw-bar seat, rolling bearing, axle sleeve, pull bar, and pull bar is hollow structure; One end of described shell arranges pull bar lid, draw-bar seat, and the other end arranges end cap; Piston, axle sleeve, rolling bearing is provided with between described pull bar lid, draw-bar seat; The both sides of piston are respectively equipped with the first air cavity, the second air cavity, and the first air cavity, the second air cavity are respectively equipped with gateway, and by gateway inflation/deflation, described gateway connects additional high pressure gas air supply unit; Described chuck is arranged at one end of pull bar, exposes a part through end cap; Chuck is by being screwed in the other end screwed hole of pull bar module from rotating shaft near one end of pull bar lid; The output shaft of motor is connected with worm shaft by described shaft coupling, worm and wheel coordinate, described worm gear and pull bar coaxial, worm-wheel shaft is pull rod shaft; The rotation of motor finally drives pull rod shaft rotary motion.
Further, described rotating shaft is when clamping tubing, to the first air cavity inflation, high pressure gas is known from experience pushing drawing rod module and is moved towards first direction, thus drive shell, end inner cap move towards first direction together with end cap, until the internal conical surface of end cap and the outer conical surface of chuck are close to, end cap continues, to first direction motion, to cause collet to tighten up, embraced by tubing, keep this state, tubing will be held tightly by chuck always; When needing to unclamp tubing, be the second air cavity inflation, the first air cavity venting, gases at high pressure drive pull bar module towards second direction motion thus promote shell, end inner cap and end cap and move towards second direction, and then the outer conical surface of collet and the internal conical surface of end cap are separated, keep releasing orientation, now collet relies on the elastic-restoring force of self to keep releasing orientation, and tubing is by released.
In one embodiment of the invention, the material of described workbench is natural granite, and the material of described column is granite.
In one embodiment of the invention, described some speculums are the one 45 ° of speculum, the 2 45 ° of speculum, the 3 45 ° of speculum.
In one embodiment of the invention, the laser beam wavelength of described femtosecond laser generator is 1064nm.
The femtosecond laser of the Laser Processing intravascular stent that the present invention proposes, whole equipment assembling accuracy is high, mechanical stability against short circuit good; Can processing metal tubing and non-metal frame tubing.
Because the present invention uses pulse width to only have the femto-second laser pulse of several thousand part per trillion seconds then to have unique materials processing characteristic, the melting zone as processed aperture is very little or do not have; Multiple material can be realized, as micromachined, the engraving of metal, semiconductor, the inner even biological tissue of transparent material etc.The femtosecond laser of heat trnasfer is not almost had to regard a kind of cold treatment instrument as; Thus greatly can improve working (machining) efficiency, breaching existing laser thin-wall pipes diced system further cannot the difficulty of machining of non-metallic material, micro-cutting of all kinds of organic polymer can be realized, therefore the present invention can open up new application for light-wall conduit laser micro Process, reduces use cost.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the structural representation of the femtosecond laser of Laser Processing intravascular stent;
Fig. 2 is the stereogram of rotating shaft;
Fig. 3 is the sectional view of rotating shaft critical piece.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " on ", D score, the orientation of the instruction such as " interior " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, connect integratedly, also can be removably connect; It can be the connection of two element internals; Can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, concrete condition can understand above-mentioned term concrete meaning in the present invention.
Main innovation part of the present invention is, the present invention innovatively proposes a kind of femtosecond laser of Laser Processing intravascular stent, and assembling accuracy is high, mechanical stability against short circuit good; Can processing metal tubing and non-metal frame tubing.
Refer to Fig. 1, the femtosecond laser of Laser Processing intravascular stent of the present invention comprises femtosecond laser generator 1, beam expanding lens 2, some speculums (comprising the one 45 ° of speculum the 3, the 2 45 ° of speculum the 4, the 3 45 ° of speculum 5), laser cutting head, rotating shaft 9, linear axis 10, workbench 11, Z axis module 12, column 13.Described column 13 is arranged on workbench 11, and Z axis module 12 is arranged on column 13, and linear axis 10 is arranged on workbench 11.Laser cutting head comprises laser printhead, focus lamp 6, protective glass 7.
Apparatus of the present invention adopt laser beam wavelength to be the femtosecond laser generator of 1064nm, the interface section modularized design of laser instrument in the design of equipment, versatility and interchangeability strong, can the laser instrument of compatible multiple brand, be applicable to femtosecond, picosecond laser processing.
Because femtosecond laser generator volume is large, therefore adopts 3 45 ° of speculums to change light path in the present invention, certainly, also can adjust number and the angle of speculum as required; Simultaneously because the laser beam spot in laser generator exit is little, need to expand.The non-Optical Fiber Transmission of transmission of laser beam, adopts 3 45 ° of speculums to add the mode of beam expanding lens, carries out Seal Design to light path in light path design.
First the laser beam that described femtosecond laser generator 1 is launched expands through beam expanding lens 2; after the one 45 ° of speculum the 3, the 2 45 ° of speculum the 4, the 3 45 ° of speculum 5 changes light path, enter the focus lamp 6 be arranged in Z axis module 12 focus on, the laser beam after focusing is beaten on the surface of support tubing 8 after protective glass 7.Laser cutting head is arranged in Z axis module 12, the rectilinear motion up and down of Z axis module 12 is realized by servomotor, thus control the Laser beam energy distribution on tubing 8 surface, simultaneously can at any time according to the change adjustment laser nozzle of laser facula and the distance on processing tubing 8 surface in process.Described rotating shaft 9 clamps and drives support tubing 8 to rotate, and rotating shaft 9 is arranged on the dynamic plate of linear axis 10, can according to the automatic feed at any time of incising pipes length in laser processing procedure.
Refer to Fig. 2, Fig. 3, below introduce the structure of rotating shaft in the present embodiment, certainly, rotating shaft can also be other shapes.Rotating shaft comprises servomotor 114, shaft coupling 116, worm screw 117, worm gear 109, pull bar module, shell 108, end inner cap 111, end cap 112, chuck 113.Described shaft device comprises base 115, and described shell 108 is arranged on this base 115.Thus, rotating shaft entirety can be fixed on linear axis platform very easily, and entirety is convenient to install (being installed on linear axis platform), utilizes alignment pin, can realize coarse positioning.
As shown in Figure 3, described pull bar module comprises pull bar lid 102, piston (comprises piston bush 103, piston inner sleeve 104, piston bush 103, piston inner sleeve 104 be provided with 0 shape sealing ring sealing), draw-bar seat 105, rolling bearing 107, axle sleeve 106, pull bar 110, pull bar 110 is hollow seamless structure.In the present embodiment, rotating shaft is the structure of inner hollow, and pull bar 110 can be allowed to pass through from centre, and the rotating shaft of hollow can realize tubing conveying function and wet cutting operation function simultaneously.Pull bar 110 is the thin-wall seamless pipe of a hollow, when wet cutting adds man-hour, adopts rearmounted water guide mode: whole tubing immerses in aqueduct, once aqueduct is revealed, current are also in the hollow sealing chamber of pull bar, can not affect the normal work of motor 114.
One end of described pull bar is provided with pull bar knob 101, can manual rotation pull bar 110.One end of described shell 108 arranges pull bar lid 102, draw-bar seat 105, and the other end arranges end cap 112; Piston, axle sleeve 106, rolling bearing 107 is provided with between described pull bar lid 102, draw-bar seat 105.The both sides of piston are respectively equipped with the first air cavity 118, second air cavity 119, first air cavity 118, second air cavity 119 and are respectively equipped with gateway, by gateway inflation/deflation; Described chuck 113 is arranged at one end of pull bar 110, exposes a part through end cap 112; Chuck 113 is by being screwed in the other end screwed hole of pull bar module from rotating shaft near one end of pull bar lid 102.The axle of the output shaft of motor 114 with worm screw 117 is connected by described shaft coupling 116, and worm screw 117 coordinates with worm gear 109, and described worm gear 109 is coaxial with pull bar 110, and worm-wheel shaft is pull rod shaft.The rotation of motor 114 finally drives pull rod shaft rotary motion.
During rotating shaft clamping tubing, first air cavity 118 is inflated, high pressure gas is known from experience pushing drawing rod module and is moved towards first direction (the right as in Fig. 3), thus drive shell 108, end inner cap 111 towards first direction motion together with end cap 112, until the outer conical surface of the internal conical surface of end cap 112 and chuck 113 is close to, end cap 112 continues to move to first direction, collet 113 is caused to tighten up, embraced by tubing, keep this state, tubing will be held tightly by chuck 113 always.When needing to unclamp tubing, be that the second air cavity 119 is inflated, the first air cavity 118 is exitted, gases at high pressure drive pull bar module towards second direction motion thus promote shell 108, end inner cap 111 and end cap 112 and move towards second direction (left side as in Fig. 3), and then the internal conical surface of the outer conical surface of collet 113 and end cap 112 is separated, keep releasing orientation, now collet 113 relies on the elastic-restoring force of self to keep releasing orientation, and tubing is by released.In addition, 0 shape sealing ring sealing is adopted between air-tightness various piece in order to ensure.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (5)
1. a femtosecond laser for Laser Processing intravascular stent, is characterized in that, comprises femtosecond laser generator, beam expanding lens, some speculums, laser cutting head, rotating shaft, linear axis, workbench, Z axis module, column; Described column is arranged on workbench, and Z axis module is arranged on column, and linear axis is arranged on workbench; Laser cutting head comprises laser nozzle, focus lamp, protective glass;
First the laser beam that described femtosecond laser generator is launched expands through beam expanding lens, and after some speculum change light paths, enter the focus lamp be arranged in Z axis module focus on, the laser beam after focusing beats the surface at support tubing after protective glass;
Laser cutting head is arranged in Z axis module, the rectilinear motion up and down of Z axis module is realized by servomotor, thus control the Laser beam energy distribution of support tube surfaces, simultaneously can at any time according to the change adjustment laser nozzle of laser facula and the distance of support tube surfaces in process;
Described rotating shaft clamps and drives support tubing to rotate, and rotating shaft is arranged on the dynamic plate of linear axis, can according to the automatic feed at any time of cutting support pipe length in laser processing procedure;
Described rotating shaft comprises motor, shaft coupling, worm screw, worm gear, pull bar module, shell, end cap, chuck; Described pull bar module comprises pull bar lid, piston, draw-bar seat, rolling bearing, axle sleeve, pull bar, and pull bar is hollow structure; One end of described shell arranges pull bar lid, draw-bar seat, and the other end arranges end cap; Piston, axle sleeve, rolling bearing is provided with between described pull bar lid, draw-bar seat; The both sides of piston are respectively equipped with the first air cavity, the second air cavity, and the first air cavity, the second air cavity are respectively equipped with gateway, and by gateway inflation/deflation, described gateway connects additional high pressure gas air supply unit; Described chuck is arranged at one end of pull bar, exposes a part through end cap; Chuck is screwed into the other end screwed hole of pull bar module from rotating shaft near one end of pull bar lid; The output shaft of motor is connected with worm shaft by described shaft coupling, worm and wheel coordinate, described worm gear and pull bar coaxial, worm-wheel shaft is pull rod shaft; The rotation of motor finally drives pull rod shaft rotary motion;
Described rotating shaft is when clamp bracket tubing, to the first air cavity inflation, high pressure gas is known from experience pushing drawing rod module and is moved towards first direction, thus drive shell, end inner cap towards first direction motion together with end cap, until the internal conical surface of end cap and the outer conical surface of chuck are close to, end cap continues to move to first direction, chuck is caused to tighten up, embraced by support tubing, keep this state, support tubing will be held tightly by chuck always;
When needing releases clamp tubing, be the second air cavity inflation, the first air cavity venting, gases at high pressure drive pull bar module towards second direction motion thus promote shell, end inner cap and end cap and move towards second direction, and then the outer conical surface of chuck and the internal conical surface of end cap are separated, keep releasing orientation, now chuck relies on the elastic-restoring force of self to keep releasing orientation, and support tubing is by released.
2. the femtosecond laser of Laser Processing intravascular stent as claimed in claim 1, it is characterized in that, the material of described workbench is natural granite.
3. the femtosecond laser of Laser Processing intravascular stent as claimed in claim 1, it is characterized in that, the material of described column is granite.
4. the femtosecond laser of Laser Processing intravascular stent as claimed in claim 1, it is characterized in that, described some speculums are the one 45 ° of speculum, the 2 45 ° of speculum, the 3 45 ° of speculum.
5. the femtosecond laser of Laser Processing intravascular stent as claimed in claim 1, it is characterized in that, the laser beam wavelength of described femtosecond laser generator is 1064nm.
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| CN201210016807.5A CN103212866B (en) | 2012-01-19 | 2012-01-19 | A kind of femtosecond laser of Laser Processing intravascular stent |
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| CN201210016807.5A CN103212866B (en) | 2012-01-19 | 2012-01-19 | A kind of femtosecond laser of Laser Processing intravascular stent |
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| CN103212866A CN103212866A (en) | 2013-07-24 |
| CN103212866B true CN103212866B (en) | 2016-01-27 |
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| CN103431925B (en) * | 2013-05-03 | 2015-08-12 | 清华大学 | A kind of multiple degrees of freedom pneumatic many shower nozzles complicated tissue organ manufacturing system |
| CN107900535B (en) * | 2017-12-11 | 2019-06-14 | 成都迈德克科技有限公司 | A kind of Nickel-titanium alloy for medical purpose intravascular stent cutting method |
| CN111001950B (en) * | 2019-12-26 | 2022-02-08 | 上海百心安生物技术股份有限公司 | Processing method and processing device of vascular stent structure |
| CN113732485B (en) * | 2021-09-22 | 2023-04-07 | 常州英诺激光科技有限公司 | High-precision laser rotation machining method |
| CN114453732A (en) * | 2021-12-27 | 2022-05-10 | 无锡超通智能制造技术研究院有限公司 | Device and method for continuously processing cardiovascular stent based on femtosecond laser |
| CN114669862A (en) * | 2022-05-06 | 2022-06-28 | 昆山允可精密工业技术有限公司 | Four-axis femtosecond laser micromachining system for medical support |
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