CN103231172A - Method and device for improving heat release efficiency of heating wire by utilizing laser texturing processing - Google Patents
Method and device for improving heat release efficiency of heating wire by utilizing laser texturing processing Download PDFInfo
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- CN103231172A CN103231172A CN2013101648708A CN201310164870A CN103231172A CN 103231172 A CN103231172 A CN 103231172A CN 2013101648708 A CN2013101648708 A CN 2013101648708A CN 201310164870 A CN201310164870 A CN 201310164870A CN 103231172 A CN103231172 A CN 103231172A
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Abstract
The invention provides a method for improving the heat release efficiency of a heating wire by utilizing laser texturing processing. The method comprises the steps of adjusting ultra-fast laser energy to enable the focusing power density to be around a damage threshold of the heating wire; focusing ultra-fast laser on the surface of the heating wire through a focusing lens, and scanning the surface of the heating wire; and regulating the scanning speed of the ultra-fast laser, so that a sub-wavelength magnitude micro grating structure is generated on the surface of the heating wire. A device for implementing the method is composed of a laser energy adjuster, the focusing lens and a heating wire mounting rack, wherein the laser energy adjuster and the focusing lens are arranged on the same light path, and the heating wire mounting rack is disposed on the rear side of the focusing lens. According to the method and the device, the micro grating structure is prepared on the surface of the heating wire through the ultra-fast laser, and the cycle of the micro grating structure is set in the sub-wavelength magnitude, so that the heat radiating area of the heating wire can be greatly increased when the ultra-fast laser is focused on the surface of the heating wire, and the heat release efficiency of the heating wire can be improved.
Description
Technical field
The present invention relates to the laser surface treating technology field, especially a kind of method and device that adopts the laser texturing to handle to improve heating wire heat release efficient.
Background technology
Used metal electric heating silk in industry and the life, it relies on the resistance of self that electric energy is converted into heat, by the surface these heats is distributed again.The traditional electrical heated filament is not considered the problem of heat release efficient, when heat accumulates in heating wire inside when too much, can cause the resistivity of material to change, and causes power shakiness even fuse device, has also caused the waste of the energy simultaneously.Therefore, the heat release efficient of raising heating wire will produce useful influence to the energy-saving safe aspect of electrical equipment.
Laser Surface Treatment has advantages such as the location is accurate, noncontact, rapid shaping.But general continuous laser or Long Pulse LASER, can only process structures such as bigbore hole or microflute at material surface, be difficult to obtain uniformity micro nano structure preferably, simultaneously because the existence of fuel factor, processes such as fusing, phase transformation can appear in the material list surface layer, and material itself is changed.Ultrafast laser is as ultra-short pulse laser of new generation, except the advantage with general Laser Surface Treatment, also having concurrently does not almost have the heat affected area, can directly write the characteristics such as producing nanoscale structures of inducing, and this makes and utilizes ultrafast laser to become possibility in heating wire surface preparation low-light grid structure.
Summary of the invention
At the weak point that exists in the problems referred to above, the invention provides a kind of method and device that adopts the laser texturing to handle to improve heating wire heat release efficient, after ultrafast laser being accumulated in the heating wire surface, its area of dissipation is greatly increased, to improve the heat release efficient of heating wire.
For achieving the above object, the invention provides a kind of method that adopts the laser texturing to handle to improve heating wire heat release efficient, may further comprise the steps:
S1, adjusting ultrafast laser energy make it focus on power density near the damage threshold of heating wire;
S2, by condenser lens ultrafast laser is focused on the heating wire surface, and scan process is carried out on the surface of heating wire;
S3, the sweep speed of ultrafast laser is regulated control, thereby make the heating wire surface produce the low-light grid structure of sub-wavelength magnitude.
Further, described condenser lens is simple lens or cylindrical lens.
Further, ultrafast laser is rotated heating wire so that ultrafast laser scans its back side after the front scan to heating wire.
Further, the pulsewidth of ultrafast laser is that femtosecond is to the ultrafast laser of picosecond magnitude.
The present invention also provides a kind of device of implementing said method simultaneously, constituted by laser energy adjuster, condenser lens and heating wire installing rack, described laser energy adjuster and described convergent lens are arranged on the same light, and described heating wire installing rack is arranged on the rear side of described convergent lens; Described laser energy adjuster is used for the energy after the outgoing of adjusting ultrafast laser, makes it focus on power density near the damage threshold of heating wire; Described condenser lens is used for ultrafast laser is focused on the heating wire surface; Described heating wire installing rack is used for the movement velocity of control heating wire.
Further, described laser energy adjuster is adjustable attenuator.
Further, described adjustable attenuator is gradual change reflectivity attenuator, by the energy of rotation gradual change reflectivity attenuator with the adjusting single laser pulse.
Further, described condenser lens is simple lens or cylindrical lens.
Further, described cylindrical lens is plano-convex shape cylindrical lens.
Compared with prior art, the present invention has the following advantages:
The present invention adopts ultrafast laser to carry out texturing and handles, and compares the physicochemical properties that traditional continuous laser or Long Pulse LASER surface treatment do not change material self;
1, the present invention utilizes ultrafast laser in heating wire surface preparation low-light grid structure, because the cycle of low-light grid structure is in the sub-wavelength magnitude, after ultrafast laser accumulated in the heating wire surface its area of dissipation is greatly increased, thereby improve the heat release efficient of heating wire.
2, the present invention adopts ultrafast laser to carry out the texturing processing, compares the physicochemical properties that traditional continuous laser or Long Pulse LASER surface treatment do not change material self.
3, the present invention in metal electric heating silk surface preparation sub-wavelength (＜1um) the low-light grid structure in magnitude cycle, this texture can increase the surface area of wire rod greatly, and the heat release performance of heating wire is improved.
Description of drawings
Fig. 1 is the flow chart of the inventive method part;
Fig. 2 is the structure chart of apparatus of the present invention part.
Main symbol description is as follows:
1-laser energy adjuster 2-condenser lens
3-heating wire installing rack 4-heating wire
The specific embodiment
As shown in Figure 1, the invention provides a kind of method that adopts the laser texturing to handle to improve heating wire heat release efficient, may further comprise the steps:
S1, adjusting ultrafast laser energy make it focus on power density near the damage threshold of heating wire;
Concrete, be adjusted to 300-500uJ by the single pulse energy of laser energy adjuster after with the ultrafast laser outgoing.
The pulsewidth of ultrafast laser be femtosecond to the ultrafast laser of picosecond magnitude, the employing wavelength is that 800nm, pulsewidth are that 100fs, repetition rate are that 1kHz, maximum single pulse energy are that the femto-second laser of 3mJ carries out texturing and handles.
S2, by condenser lens ultrafast laser is focused on the heating wire surface, and scan process is carried out on the surface of heating wire.
Concrete, lens are simple lens or cylindrical lens, in the present embodiment, lens are the cylindrical lens of focal distance f=150mm.
S3, the sweep speed of ultrafast laser is regulated control, thereby make the heating wire surface produce the low-light grid structure of sub-wavelength magnitude.
Concrete, it is that 500uJ, sweep speed are 5mm/s that the adjusting laser energy makes single pulse energy.Ultrafast laser carries out 180 ° of rotations so that ultrafast laser scans its back side with heating wire after the front scan to heating wire.
As shown in Figure 2, the invention provides a kind of device that adopts the laser texturing to handle to improve heating wire heat release efficient, constituted with heating wire installing rack 3 by laser energy adjuster 1, condenser lens 2, laser energy adjuster and convergent lens are arranged on the same light, and the heating wire installing rack is arranged on the rear side of convergent lens; The laser energy adjuster is used for the energy after the outgoing of adjusting ultrafast laser, makes it focus on power density near the damage threshold of heating wire.The laser energy adjuster is adjustable attenuator.In the present embodiment, adjustable attenuator is gradual change reflectivity attenuator, and making laser single-pulse energy by rotation gradual change reflectivity attenuator is 300-500uJ.Condenser lens is used for ultrafast laser is focused on the heating wire surface, and condenser lens is simple lens or cylindrical lens.In the present embodiment, cylindrical lens is that focal length is the plano-convex shape cylindrical lens of 150mm.Heating wire installing rack 3 is used for the movement velocity of control heating wire.The two ends of heating wire are separately fixed on two heating wire 4 installing racks.All be that motor is installed on each heating wire installing rack, this driven by motor heating wire moving, its payingoff speed is 5mm/s.In the present embodiment, heating wire is the iron-chromium-aluminum metal heating wire.
Only the above person only is preferred embodiment of the present invention, is familiar with the professional person of this skill such as. after understanding technological means of the present invention, natural energy is changed under instruction of the present invention according to the needs of reality.Therefore all equal variation and modifications of doing according to the present patent application claim once should still belong in the scope that patent of the present invention contains.
Claims (9)
1. a method that adopts the laser texturing to handle to improve heating wire heat release efficient is characterized in that, may further comprise the steps:
S1, adjusting ultrafast laser energy make it focus on power density near the damage threshold of heating wire;
S2, by condenser lens ultrafast laser is focused on the heating wire surface, and scan process is carried out on the surface of heating wire;
S3, the sweep speed of ultrafast laser is regulated control, thereby make the heating wire surface produce the low-light grid structure of sub-wavelength magnitude.
2. employing laser according to claim 1 texturing handles to improve the method for heating wire heat release efficient, it is characterized in that, described condenser lens is simple lens or cylindrical lens.
3. employing laser according to claim 2 texturing handles to improve the method for heating wire heat release efficient, it is characterized in that, ultrafast laser is rotated heating wire so that ultrafast laser scans its back side after the front scan to heating wire.
4. handle to improve the method for heating wire heat release efficient according to arbitrary described employing laser texturing in the claim 1 to 3, it is characterized in that, the pulsewidth of ultrafast laser is that femtosecond is to the ultrafast laser of picosecond magnitude.
5. device of implementing said method, it is characterized in that, be made of laser energy adjuster, condenser lens and heating wire installing rack, described laser energy adjuster and described convergent lens are arranged on the same light, and described heating wire installing rack is arranged on the rear side of described convergent lens;
Described laser energy adjuster is used for the energy after the outgoing of adjusting ultrafast laser, makes it focus on power density near the damage threshold of heating wire;
Described condenser lens is used for ultrafast laser is focused on the heating wire surface;
Described heating wire installing rack is used for the movement velocity of control heating wire.
6. device according to claim 5 is characterized in that, described laser energy adjuster is adjustable attenuator.
7. device according to claim 6 is characterized in that, described adjustable attenuator is gradual change reflectivity attenuator, by the energy of rotation gradual change reflectivity attenuator with the adjusting single laser pulse.
8. device according to claim 5 is characterized in that, described condenser lens is simple lens or cylindrical lens.
9. device according to claim 8 is characterized in that, described cylindrical lens is planoconvex spotlight.
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| CN2013101648708A CN103231172A (en) | 2013-05-07 | 2013-05-07 | Method and device for improving heat release efficiency of heating wire by utilizing laser texturing processing |
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| CN2013101648708A CN103231172A (en) | 2013-05-07 | 2013-05-07 | Method and device for improving heat release efficiency of heating wire by utilizing laser texturing processing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734138A (en) * | 2022-04-24 | 2022-07-12 | 中国科学院重庆绿色智能技术研究院 | Method for enhancing laser energy absorption efficiency of spatial additive manufacturing wire |
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| US6979798B2 (en) * | 2003-03-07 | 2005-12-27 | Gsi Lumonics Corporation | Laser system and method for material processing with ultra fast lasers |
| CN101804551A (en) * | 2010-03-16 | 2010-08-18 | 西安交通大学 | Method for preparing micro-nano composite texturing cutting tool by using femtosecond laser |
| CN102896425A (en) * | 2012-09-26 | 2013-01-30 | 北京工业大学 | Method for rapidly preparing large area nano texture on metal surface by ultrafast laser |
| CN102909477A (en) * | 2012-10-31 | 2013-02-06 | 北京工业大学 | Method and device for preparing large area of micro gratings on surface of target material by utilizing ultra-fast laser |
| CN103042375A (en) * | 2013-01-08 | 2013-04-17 | 中国人民解放军装甲兵工程学院 | Machining method for manufacturing regular microtexture on surface of metal matrix or coating |
| CN103060796A (en) * | 2013-01-14 | 2013-04-24 | 温州大学 | Method for repairing and strengthening gear through laser compound microtexture |
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2013
- 2013-05-07 CN CN2013101648708A patent/CN103231172A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6979798B2 (en) * | 2003-03-07 | 2005-12-27 | Gsi Lumonics Corporation | Laser system and method for material processing with ultra fast lasers |
| CN101804551A (en) * | 2010-03-16 | 2010-08-18 | 西安交通大学 | Method for preparing micro-nano composite texturing cutting tool by using femtosecond laser |
| CN102896425A (en) * | 2012-09-26 | 2013-01-30 | 北京工业大学 | Method for rapidly preparing large area nano texture on metal surface by ultrafast laser |
| CN102909477A (en) * | 2012-10-31 | 2013-02-06 | 北京工业大学 | Method and device for preparing large area of micro gratings on surface of target material by utilizing ultra-fast laser |
| CN103042375A (en) * | 2013-01-08 | 2013-04-17 | 中国人民解放军装甲兵工程学院 | Machining method for manufacturing regular microtexture on surface of metal matrix or coating |
| CN103060796A (en) * | 2013-01-14 | 2013-04-24 | 温州大学 | Method for repairing and strengthening gear through laser compound microtexture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114734138A (en) * | 2022-04-24 | 2022-07-12 | 中国科学院重庆绿色智能技术研究院 | Method for enhancing laser energy absorption efficiency of spatial additive manufacturing wire |
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Application publication date: 20130807 |