CN201896205U - Device used for realizing laser suspension zone-melting directional solidification - Google Patents
Device used for realizing laser suspension zone-melting directional solidification Download PDFInfo
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- CN201896205U CN201896205U CN2010205962448U CN201020596244U CN201896205U CN 201896205 U CN201896205 U CN 201896205U CN 2010205962448 U CN2010205962448 U CN 2010205962448U CN 201020596244 U CN201020596244 U CN 201020596244U CN 201896205 U CN201896205 U CN 201896205U
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Abstract
Disclosed is a device used for realizing laser suspension zone-melting directional solidification. A laser in the device is located on one side of a vacuum chamber, a spectroscope, a first reflector, a second reflector and a third reflector are successively distributed outside the vacuum chamber, and two plate lenses are respectively embedded on a casing on two sides of the vacuum chamber and correspond to positions of melting zones. A laser beam is divided into two laser beams with equal mass after passing through the spectroscope, the two laser beams are perpendicular mutually, one laser beam is received by the first reflector, is reflected to the second reflector, and then is transmitted to the plate lens corresponding to the laser beam via a convex lens so as to enter the vacuum chamber to be reflected to the corresponding melting zone, and the other laser beam is received by the third reflector, and is transmitted to the plate lens corresponding to the other laser beam via a convex lens on the other side so as to enter the vacuum chamber to be reflected to the corresponding melting zone. The device adopts the bidirectional laser beams with equal mass to realize zone-melting for preforms, simultaneously the preforms rotate so as to achieve the purpose that temperature fields of front edges of solid liquid interfaces of the preforms are uniform and straight, obtained oxide eutectic authigenous composite materials are fine in directionality, and further the device has the advantages of simple structure and simplicity and convenience in operation.
Description
Technical field
The present invention relates to materials processing engineering field, specifically is the device and the directional solidification process of the molten directional freeze in a kind of laser levitation district.
Background technology
Take the various technology of the molten directional freeze in high energy beam district owing to have characteristics such as smelting temperature height, thermograde height, solidification rate control accuracy height, material and environmental compatibility be extensive, pollution-free, numerous scholars' that now gone abroad great attention.Temperature field, solid-liquid interface forward position in the molten directional freeze process in district is straight to be the precondition that obtains uniform formation, otherwise it is inconsistent on a large scale that the tissue of gained precast body and mechanical property will occur on macroscopic view, uses for interpretation and material and cause very big obstacle.For example in the molten test in laser level district, the isothermal surface shape is not perpendicular to the plane of solidifying direction, but curved surface, the melting zone temperature is reduced to the bottom gradually by the surface, melting zone.This just causes the solidification rate difference of precast body from the top to the bottom, and gained is organized also different, and its mechanical property also has long-range to change, and tissue subsequently and performance analysis just are difficult to be complementary with curing condition.So various countries scholar and engineering technical personnel can make a temperature even and straight method in searching.
Present domestic laser orientation coagulation system mainly is a laser level district fusing device, is made up of laser apparatus, lens set and numerically-controlled machine.The laser beam that laser apparatus is sent by lens set causes the numerically-controlled machine top of horizontal positioned, to lying in a horizontal plane in the molten directional freeze in sample district on the lathe.This device can't guarantee that isothermal surface is straight.
The precast body of the fusible large-size of visible light floating zone melting, by superpower (＞1KW) light beam that sends of halogen lamp (as xenon lamp) focuses on the coupon surface after specular reflection, the downward pull of coupon is realized directional freeze, and meanwhile, coupon also need rotate to improve the homogeneity of heating.For the efficient that improves LASER HEATING and solve the molten power density in laser levitation district and concentrate the precast body stress problem of bringing, with coupon at same position by infrared preheating or visible light preheating, the precast body after obtaining heating.
The laser pedestal legal to solidification equipment need with two bundle equipower laser by two sides on direction focus on the precast body upper surface because the speed differences of two cover drawing devices up and down, the fiber speed of promptly growing is different with feeding rate, thus producd fibers.
People such as the breadboard Sayir of U.S. NASA Green utilize the cam-like speculum of two high speed rotating, have realized the high speed scan round of laser beam on the precast body surface, thereby guarantee that the temperature field is even.Successfully grow directional freeze oxide eutectic fiber with uniform formation.
Said apparatus guarantees that in a different manner temperature field, solid-liquid interface forward position is even, but all has complex structure, the deficiency that cost is high.
Summary of the invention
For overcoming complex structure in the prior art, the deficiency that cost is high the present invention proposes a kind of device that is used for the molten directional freeze in laser levitation district.
The device that is used for the molten directional freeze in laser levitation district of the present invention comprises laser apparatus, vacuum chamber, pull rotational system, group of motors and speculum, and laser apparatus is positioned at vacuum chamber one side.
The described device that is used for the molten directional freeze in laser levitation district also comprises spectroscope, plano lens, convex lens and convex lens translating device; Speculum comprises first speculum, second speculum and the 3rd speculum; Spectroscope, first speculum, second speculum and the 3rd speculum are distributed in outside the vacuum chamber successively; Plano lens has two, is inlaid in respectively on vacuum chamber two side bodies, and corresponding with the position, melting zone.
Described spectroscope is positioned at the laser exit place of vacuum chamber one side, laser apparatus, and the distance of this spectroscopical width between centers laser apparatus light-emitting window is 1m, spectroscopical minute surface and laser beam angle at 45 makes laser beam through being divided into the laser of quality such as mutually perpendicular two bundles behind the spectroscope; Two bundle laser are in same horizontal plane, and wherein beam of laser is received by first speculum, and another Shu Jiguang is received by the 3rd speculum.
The laser beam that described first speculum receives reflects to second speculum; After the laser beam reflection that second speculum receives, be emitted to corresponding with it plano lens, and enter vacuum chamber by this plano lens and be emitted to the melting zone by the convex lens that are positioned at vacuum chamber one side; After the laser beam reflection that the 3rd speculum receives, be emitted to corresponding with it plano lens, and enter vacuum chamber by this plano lens and be emitted to the melting zone by the convex lens that are positioned at the vacuum chamber opposite side; Second speculum and the 3rd mirror reflects to the angle between the laser beam in melting zone is 160 °.
Described first speculum is positioned at the vacuum chamber opposite side, and the distance at the center of this first speculum and spectroscope center is 1m; The minute surface of first speculum and spectroscopical minute surface are parallel to each other; Second speculum and the 3rd speculum lay respectively at the vacuum chamber both sides, and corresponding with vacuum chamber and plano lens on two side bodies respectively; The minute surface of second speculum is corresponding with the minute surface of first speculum, and second mirror mirror becomes 50 ° of angles with the laser beam that is received; The 3rd mirror mirror becomes 50 ° of angles with the laser beam that is received.
Described spectroscope, plano lens, convex lens and speculum all are in same horizontal plane with the melting zone.The focal length of selected convex lens 6 is 200mm.
Adjust central point to the two bundle laser intersection point distance of two convex lens mirror bodies by the convex lens translating device.
The present invention adopts quality laser beam such as two-way molten to the precast body district, rotate precast body simultaneously, reach and make evenly straight purpose of temperature field, precast body solid-liquid interface forward position, it is high to have overcome the cost in the traditional method, complex structure and other problems, and well solved problem with comparatively easy method.This device can carry out oriented freezing organization evolution research to fusing point height, electrically nonconducting material, resulting oxide eutectic in-situ composite homogeneous microstructure and tiny densification, directional property is good, and its mechanical property and other function are all significantly better than other directional solidification processs.The size and dimension of the functional materials of its production also can satisfy various photoelectricity purposes, for example application of solid statelaser, nonlinear optical element and optical spectra.
Description of drawings
Accompanying drawing 1 is the structural representation of the molten device for directionally solidifying in laser levitation district.
Accompanying drawing 2 is that the A of device for directionally solidifying structural representation is melted to attempting in the laser levitation district.
1. laser apparatus 2. spectroscopes 3. first speculums 4. second speculums 5. the 3rd speculum 6. convex lens 7. convex lens translating devices 8. plano lens 9. vacuum chambers 10. pull rotational systems 11. group of motors 12. tack bolts 13. precast bodies 14. melting zones
Embodiment
Embodiment one
Present embodiment is a kind of device that is used for the molten directional freeze in laser levitation district, comprises laser apparatus 1, spectroscope 2, speculum, two convex lens 6, two plano lens 8 and convex lens translating device 7, vacuum chamber 9, pull rotational system 10 and two group of motors 11.In the present embodiment, three of plane mirrors comprise first speculum 3, second speculum 4 and the 3rd speculum 5, and spectroscope 2, first speculum 3, second speculum 4 and the 3rd speculum 5 are distributed in vacuum chamber 9 neighborings successively.Laser apparatus 1 is positioned at vacuum chamber 9 one sides.The plano lens 8 of two circles is inlaid in respectively on 9 liang of side bodies of vacuum chamber; The central axis of this plano lens 8 is crossed the axis of pull rotational system 10 and perpendicular to the axis of pull rotational system 10, drop on the axis of pull rotational system 10 after making two bundle laser after focusing on through two convex lens 6 enter vacuum chamber 9 by two plano lens 8, realization is to being installed in the fusion of precast body 13 on the pull rotational system 10, and then forms melting zone 14 on precast body 13.
In the present embodiment, the laser beam that first speculum 3 receives reflects to second speculum 4; After the laser beam reflection that second speculum 4 receives, reflex to corresponding with it plano lens 8, and enter vacuum chamber 9 by this plano lens 8 and reflex to melting zone 14 by the convex lens 6 that are positioned at vacuum chamber 9 one sides; After the laser beam reflection that the 3rd speculum 5 receives, reflex to corresponding with it plano lens 8, and enter vacuum chamber 9 by this plano lens 8 and reflex to melting zone 14 by the convex lens 6 that are positioned at vacuum chamber 9 opposite sides.
The plane of spectroscope 2, first speculum 3, second speculum 4 and the 3rd speculum 5 and plano lens 8 is perpendicular to horizontal plane.The primary optical axis level of convex lens 6.
Width between centers laser apparatus 1 light-emitting window of spectroscope 2 is 1m, and with laser beam angle at 45, the laser level that laser apparatus 1 produces is by spectroscope 2, is divided into the laser of quality such as mutually perpendicular two bundles, and two restraint laser planar horizontal of living in.First speculum, 3 centers and spectroscope 2 width between centers 1m, with laser angle through spectroscope 2 transmissions be 45 °.Second speculum 4 is centered close to by first speculum, 3 beam reflected centers, and its center and first speculum, 3 width between centerss are 1m, and become 50 ° of angles with laser beam.The 3rd speculum 5 is centered close to by spectroscope 2 beam reflected centers, and its center and spectroscope 2 width between centerss are 1m, and become 50 ° of angles with laser beam, and finally two bundle laser angles after second speculum 4 and 5 reflections of the 3rd speculum are 160 °.
The central point of two convex lens 6 mirror bodies is respectively through the intrafascicular heart of second speculum 4 the 3rd speculum 5 laser light reflected, and adjusts central point to two bundle laser intersection point distance by two convex lens, 6 mirror bodies by convex lens translating device 7.The focal length of selected convex lens 6 is 200mm.
Pull rotational system 10 comprises upper grip and lower chuck, and the axis of pull rotational system 10 is vertical, and the two ends of this pull rotational system 10 are connected with two group of motors 11 respectively, realizes the rotation and the axial motion of pull systems by group of motors 11.The upper grip of pull rotational system 10 and lower chuck are circular rod member, and an end of this upper grip and lower chuck excircle all has the step of protrusion, make its profile be "T"-shaped; Have the end face center of step one end of protrusion that blind hole is all arranged at upper grip and lower chuck, the internal diameter of this blind hole is slightly larger than the external diameter of precast body 13.
The two ends of precast body 13 are respectively charged into the blind hole that is positioned at pull system 10 upper grips and lower chuck one end end face center, and screw tack bolt 12 with the fastening location of precast body.Precast body 13 is coaxial with pull rotational system 10.
Claims (4)
1. a device that is used for the molten directional freeze in laser levitation district comprises laser apparatus (1), vacuum chamber (9), pull rotational system (10), group of motors (11) and speculum, and laser apparatus (1) is positioned at vacuum chamber (9) one sides; It is characterized in that,
A. the described device that is used for the molten directional freeze in laser levitation district also comprises spectroscope (2), plano lens (8), convex lens (6) and convex lens translating device (7); Speculum comprises first speculum (3), second speculum (4) and the 3rd speculum (5); Spectroscope (2), first speculum (3), second speculum (4) and the 3rd speculum (5) are distributed in outside the vacuum chamber (9) successively; Plano lens (8) has two, is inlaid in respectively on vacuum chamber (9) two side bodies, and corresponding with position, melting zone (14);
B. spectroscope (2) is positioned at the laser exit place of vacuum chamber (9) one sides, laser apparatus (1), and the distance of this spectroscopical width between centers laser apparatus light-emitting window is 1m, the minute surface of spectroscope (2) and laser beam angle at 45 make laser beam through being divided into the laser of quality such as mutually perpendicular two bundles behind the spectroscope; Two bundle laser are in same horizontal plane, and wherein beam of laser is received by first speculum (3), and another Shu Jiguang is received by the 3rd speculum (5);
C. the laser beam of first speculum (3) reception reflects to second speculum (4); After the laser beam reflection that second speculum (4) receives, reflex to corresponding with it plano lens (8), and enter vacuum chamber (9) by this plano lens (8) and reflex to melting zone (14) by the convex lens (6) that are positioned at vacuum chamber (9) one sides; After the laser beam reflection that the 3rd speculum (5) receives, reflex to corresponding with it plano lens (8), and enter vacuum chamber (9) by this plano lens (8) and reflex to melting zone (14) by the convex lens (6) that are positioned at vacuum chamber (9) opposite side; The angle that second speculum (4) and the 3rd speculum (5) reflex between the laser beam of melting zone (14) is 160 °;
D. first speculum (3) is positioned at vacuum chamber (9) opposite side, and the distance at the center of this first speculum (3) and spectroscope (2) center is 1m; The minute surface of the minute surface of first speculum (3) and spectroscope (2) is parallel to each other; Second speculum (4) and the 3rd speculum (5) lay respectively at vacuum chamber (9) both sides, and corresponding with vacuum chamber (9) and plano lens (8) on two side bodies respectively; The minute surface of second speculum (4) is corresponding with the minute surface of first speculum (3), and second speculum (4) minute surface becomes 50 ° of angles with the laser beam that is received; The minute surface of the minute surface of the 3rd speculum (5) and spectroscope (2) is parallel to each other, and the 3rd speculum (5) minute surface becomes 50 ° of angles with the laser beam that is received.
2. a kind of according to claim 1 device that is used for the molten directional freeze in laser levitation district is characterized in that spectroscope (2) plano lens (8), convex lens (6) and speculum all are in same horizontal plane with melting zone (14).
3. a kind of according to claim 1 device that is used for the molten directional freeze in laser levitation district is characterized in that, adjusts central point to the two bundle laser intersection point distance of two convex lens (6) mirror body by convex lens translating device (7).
4. a kind of according to claim 1 device that is used for the molten directional freeze in laser levitation district is characterized in that the focal length of selected convex lens (6) is 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205962448U CN201896205U (en) | 2010-11-04 | 2010-11-04 | Device used for realizing laser suspension zone-melting directional solidification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205962448U CN201896205U (en) | 2010-11-04 | 2010-11-04 | Device used for realizing laser suspension zone-melting directional solidification |
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| CN201896205U true CN201896205U (en) | 2011-07-13 |
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| CN2010205962448U Expired - Lifetime CN201896205U (en) | 2010-11-04 | 2010-11-04 | Device used for realizing laser suspension zone-melting directional solidification |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703971A (en) * | 2012-06-01 | 2012-10-03 | 西北工业大学 | Method for preparing Si-based binary eutectic in-situ composites |
| CN105002553A (en) * | 2015-07-29 | 2015-10-28 | 哈尔滨工业大学（威海） | Annular electron beam crucible-free zone smelting device used in vacuum environment |
| CN107858750A (en) * | 2017-11-05 | 2018-03-30 | 西北工业大学 | A kind of Al2O3‑YAG:Ce3+The preparation method of eutectic fluorescence ceramics |
-
2010
- 2010-11-04 CN CN2010205962448U patent/CN201896205U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703971A (en) * | 2012-06-01 | 2012-10-03 | 西北工业大学 | Method for preparing Si-based binary eutectic in-situ composites |
| CN102703971B (en) * | 2012-06-01 | 2015-05-27 | 西北工业大学 | Method for preparing Si-based binary eutectic in-situ composites |
| CN105002553A (en) * | 2015-07-29 | 2015-10-28 | 哈尔滨工业大学（威海） | Annular electron beam crucible-free zone smelting device used in vacuum environment |
| CN105002553B (en) * | 2015-07-29 | 2017-07-04 | 哈尔滨工业大学（威海） | The annular electron beam non-crucible zone melting device used in vacuum environment |
| CN107858750A (en) * | 2017-11-05 | 2018-03-30 | 西北工业大学 | A kind of Al2O3‑YAG:Ce3+The preparation method of eutectic fluorescence ceramics |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20110713 Effective date of abandoning: 20120725 |