CN105039897A - Metal surface laser bluing processing device and method - Google Patents
Metal surface laser bluing processing device and method Download PDFInfo
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- CN105039897A CN105039897A CN201510378477.8A CN201510378477A CN105039897A CN 105039897 A CN105039897 A CN 105039897A CN 201510378477 A CN201510378477 A CN 201510378477A CN 105039897 A CN105039897 A CN 105039897A
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Abstract
The invention discloses a realtime monitoring metal surface laser bluing processing device and method. The device comprises a laser, a light beam shaping system, and a scattered light monitoring system. The laser beams generated by the laser are shaped and then evenly radiated on the whole surface of workpiece to be processed through the scattered light monitoring system. In the provided technology and device, the absorption and intervene effects on incident laser beams of the oxidation film formed by the bluing on the metal surface are used to monitor the bluing degree in real time, the bluing degree is converted into a realtime voltage signal by using the characteristic of high sensitivity of a photoelectric detector, the laser beam strength of the laser is controlled at the same time, thus the realtime monitored bluing processing on different metal surfaces is achieved, and the method has the characteristics of strong adaptability, convenient and simple operation, no environment pollution, and controllable process.
Description
Technical field
The invention belongs to field of metal surface treatment technology, relate to a kind of metallic surface turn blue process apparatus and method, especially a kind of utilize laser to metallic surface turn blue process apparatus and method.
Background technology
Technique of turning blue is a kind of material protection technology; its essence is that chemical reaction is passed through in the metallic surfaces such as iron and steel; mainly oxidizing reaction; thus generate a kind of even compact, have certain thickness, black-and-blue oxide film that strong adhesion, corrosion resisting property are good, play beautify, the effect of corrosion-resistant and protection workpiece.The main technique turned blue in metal current surface has: thermokalite turns blue, Bluing in Normal Temperature, graphite fluidized bed turn blue, resistive heating is turned blue, lead bath heating is turned blue, electromagnetic induction heating is turned blue and oxygen-containing steam turns blue.The main Problems existing of these techniques is, the degree that workpiece turns blue is difficult to monitoring in real time, can only by processing the testing evaluation of rear sample to completing to turn blue, the parameter such as solution, time and adjustment is turned blue, to obtain best processing parameter, make troubles to actual production processing, easily cause waste and environmental pollution simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of metallic surface bluing treating device based on laser irradiation and method, by the Real-Time Monitoring to laser parameter, and then treating processes of turning blue is controlled in real time, there is the features such as simple to operate, treating processes is controlled.
Technical solution scheme of the present invention is:
A kind of metal surface laser bluing treating device, comprises laser apparatus, beam shaping system and scattered light Monitoring systems; The outgoing beam of laser apparatus is incident to workpiece surface to be turned blue after the homogenize of beam shaping system and shaping, and scattered light Monitoring systems is monitored for the scattered light intensity signal of workpiece surface to be turned blue.
In above-mentioned metal surface laser bluing treating device, scattered light Monitoring systems comprises integrating sphere, photodetector and signal recorder, workpiece setting to be turned blue is in the delivery port position of integrating sphere, incoming beam is incident to the surface of workpiece to be turned blue through the input aperture of integrating sphere, wait the scattered light of the workpiece surface that turns blue after integrating sphere is collected, by the intensity amplitude signal of the signal recorder record scattered light of the photodetector arranged on integrating sphere and rear end.
In above-mentioned metal surface laser bluing treating device, beam shaping system comprises beam expanding lens and diaphragm.
In above-mentioned metal surface laser bluing treating device, beam shaping system comprises microlens array and diaphragm.
In above-mentioned metal surface laser bluing treating device, laser apparatus is continuous or recurrent frequency pulse laser device.
In above-mentioned metal surface laser bluing treating device, workpiece surface to be turned blue is plane.
In above-mentioned metal surface laser bluing treating device, laser is evenly incident to the whole surface of workpiece to be turned blue.
In above-mentioned metal surface laser bluing treating device, the material of workpiece to be turned blue is the alloys in common use materials such as common metal material and carbon steel such as iron, nickel, aluminium.
The method turned blue in metallic surface, comprises the following steps:
[1] treat the workpiece surface that turns blue and carry out sanding and polishing and clean;
[2] laser is treated the workpiece surface that turns blue and is heated, and realizes turning blue process;
[3] scattered light signal of scattered light Monitoring systems Real-Time Monitoring workpiece surface to be turned blue, and compare with the turn blue relation of degree of the metallic surface scattered light signal obtained in advance and workpiece surface, realize the monitoring to the process of turning blue;
[4] opening and closing of laser apparatus are controlled according to the metallic surface scattered light signal of monitoring, the workpiece that turns blue required for acquisition.
The beneficial effect that the present invention has is as follows:
1, the present invention proposes a kind for the treatment of process that turns blue based on laser irradiation metallic surface; laser irradiation is utilized to arrive the metallic surface such as iron, nickel; there is oxidizing reaction in atmosphere; metallic surface is made to produce fine and close oxide film; realize turning blue of metallic surface, reach beautify, corrosion-resistant and protection workpiece object.
2, the present invention is being turned blue in process, by the scattered light signal of Real-Time Monitoring laser over time, and with demarcate in advance the scattered light signal that obtains compared with the relational result of the degree of turning blue, realize the Real-Time Monitoring to the process of turning blue of workpiece, and open at any time or stop laser apparatus, reach the control to the process of turning blue, there is environmental pollution little, capacity usage ratio high, is particularly useful for the process of turning blue of batch test specimen.
3, process of turning blue of the present invention can change the parameter of laser apparatus according to the material of workpiece, kind and size and realize, and such as laser beam expanding or focusing, high-power or small power, continuously or repetition pulse etc., has stronger adaptability.
Accompanying drawing explanation
Fig. 1 is the metal surface laser bluing treating device schematic diagram that the present invention can monitor in real time;
Fig. 2 is metal works scattered light signal Changing Pattern in time in laser turns blue process;
Wherein 1-laser apparatus; 2-light beam; 3-beam shaping system; 4-integrating sphere; 5-photodetector; 6-workpiece to be turned blue; 7-signal recorder.
Embodiment
Below to metallic iron surface to carry out turning blue being treated to example, introduce process principle of the present invention.
As shown in Figure 1, the light beam 2 that laser apparatus 1 exports is after beam shaping system 3 beam uniformity and shaping, the surface of workpiece 6 to be turned blue is incident to by the input aperture of integrating sphere 4, workpiece 6 to be turned blue is arranged on the delivery port position of integrating sphere 4, the scattered light on its surface, after integrating sphere is collected, is recorded the intensity amplitude signal of scattered light by the photodetector 5 of setting on integrating sphere 4 and the signal recorder 7 of rear end.The model of photodetector 5 can be chosen according to the real power of laser beam and wavelength.
When the laser beam with certain power density can rapid heating metallic iron surface, in air ambient, can fast with the oxygen generation oxidizing reaction in air by the iron surface that heats, generate several layers of fine and close oxide film, process of namely turning blue.
For metallic iron, by the surface temperature of laser power control sample, make it lower than 570 DEG C, by iron-oxygen phasor, oxide film is primarily of outer field Fe
2o
3with the Fe of internal layer
3o
4composition.Wherein Fe
2o
3to laser substantially transparent, interference effect is produced, Fe to the laser of incidence
3o
4then strong absorption laser, along with thickening of oxide film, sample will present the feature of periodic damping to the scattered light of laser.This just illustrates the corresponding specific scattered light intensity of different thickness of oxidation film, so directly can measure scattered light signal, realize the monitoring of degree of turning blue to metallic surface.
For ensureing to turn blue the homogeneity of effect, laser beam used must be shaped as uniform hot spot, and be laser facula irradiation in whole workpiece planarization, to realize homogeneous heating.If workpiece size is comparatively large, due to the impact of heat radiation, workpiece surface temperature can be caused uneven, now by the mode of Repetition Frequency Laser heating, and whole workpiece temperature be controlled, also can realize the process of evenly turning blue on surface.
For the workpiece of different metal kind, its surface treatment temperature, rule between scattered light Changing Pattern and the degree of turning blue may be different, need to carry out calibration measurements to it in advance, and by scattered light signal with opening relationships between thickness of oxidation film, the laser that can realize different metal workpiece surface turns blue the monitoring of process and degree of turning blue.
Fig. 2 gives the heat radiation light intensity over time rule of metallic iron flat test piece in the process of turning blue.The present invention to obtain in Fig. 2 the turn blue metallic surface of process of iron test specimen in many stages of A, B, C, D, E, F in advance and to turn blue photo, and actual measurement obtains the parameter such as oxide thickness, surface color in multiple stage, establishes the relation between metal bluing degree and surface scattering optical signal.In follow-up actual treatment, only needing according to measuring the surface scattering optical signal obtained in real time, the loading power of laser and time being adjusted, reaches the object to whole turn blue process Real-Time Monitoring and control.
The present invention proposes a kind of metal surface laser that can monitor in real time to turn blue treatment process and device, comprise the following steps:
The method turned blue in metallic surface, comprises the following steps:
[1] treat the workpiece surface that turns blue and carry out sanding and polishing and clean;
[2] laser is treated the workpiece surface that turns blue and is heated, and realizes turning blue process;
[3] scattered light signal of scattered light Monitoring systems Real-Time Monitoring workpiece surface to be turned blue, and compare with the turn blue relation of degree of the metallic surface scattered light signal obtained in advance and workpiece surface, realize the monitoring to the process of turning blue;
[4] opening and closing of laser apparatus are controlled according to the metallic surface scattered light signal of monitoring, the workpiece that turns blue required for acquisition.
Open by measuring photo detector signal or stop laser like this, realizing the real-time monitoring that workpiece surface turns blue.
Provide the experimental result of apparatus of the present invention for the surperficial treatment and monitoring that turns blue of metallic iron below, laser apparatus 1 produces power is as shown in Figure 1 5W, the Gaussian beam of wavelength 1064nm, by the homogenize of beam shaping system, be constrained to by diaphragm the uniform light spots that shape is 11mm × 11mm again after expanding, power density is 2W/cm
2.Metallic iron workpiece size used is 10mm × 10mm, thickness 0.4mm.Workpiece is placed in integrating sphere light-emitting window place, then with orthopedic uniform light spots irradiation workpiece surface.The scattered light of metallic surface is detected with InGaAs detector, the Changing Pattern of scattered light signal in the surperficial process of turning blue of metallic iron as shown in Figure 2 can be obtained, by the relation with the heat radiation light and degree of turning blue of demarcating acquisition in advance, monitor and forecast can be carried out to the ironing surface degree of turning blue of workpiece.
The surface of workpiece that process unit of the present invention can meet differing materials and size turns blue treatment and monitoring, applied widely, non-environmental-pollution, for metallic surface technique of turning blue provides a kind of new technique means.The alloys in common use material surfaces such as common metal material and carbon steel such as apparatus and method available iron of the present invention, nickel, aluminium turn blue process.In addition, the scattered light Monitoring systems of apparatus of the present invention also can be applicable to workpiece in other technique of turning blue and to turn blue the monitoring of effect.
Claims (9)
1. a metal surface laser bluing treating device, is characterized in that: comprise laser apparatus (1), beam shaping system (3) and scattered light Monitoring systems; The outgoing beam (2) of described laser apparatus (1) is incident to workpiece to be turned blue (6) surface after (3) homogenize of beam shaping system and shaping, the scattered light intensity signal that scattered light Monitoring systems is used for workpiece to be turned blue (6) surface is monitored, and compare with the turn blue relation of degree of the metallic surface scattered light signal obtained in advance and workpiece surface, realize the control to laser apparatus (1) irradiation time.
2. metal surface laser bluing treating device according to claim 1, it is characterized in that: described scattered light Monitoring systems comprises integrating sphere (4), photodetector (5) and signal recorder (7), described workpiece to be turned blue (6) is arranged on the delivery port position of integrating sphere (4), described incoming beam (2) is incident to the surface of workpiece to be turned blue (6) through the input aperture of integrating sphere (4), wait the workpiece that turns blue (6) surface scattered light through integrating sphere (4) collect after, by the strength signal recording scattered light at the photodetector (5) of the upper setting of integrating sphere (4) and the signal recorder (7) of rear end.
3. metal surface laser bluing treating device according to claim 1, is characterized in that: the diaphragm that described beam shaping system (3) comprises beam expanding lens and arranges thereafter.
4. metal surface laser bluing treating device according to claim 1, is characterized in that: the diaphragm that described beam shaping system (3) comprises microlens array and arranges thereafter.
5. metal surface laser bluing treating device according to claim 1, is characterized in that: described laser apparatus is continuous or recurrent frequency pulse laser device.
6. metal surface laser bluing treating device according to claim 1 and 2, is characterized in that: described workpiece to be turned blue (6) surface is plane.
7. metal surface laser bluing treating device according to claim 6, is characterized in that: described laser is evenly incident to the whole surface of workpiece to be turned blue (6).
8. metal surface laser bluing treating device according to claim 1 and 2, is characterized in that: the material of described workpiece to be turned blue (6) is iron, nickel, aluminium or carbon steel alloy.
9. utilize the metal surface laser bluing treating device described in claim 1 or 2 to carry out a method of turning blue metallic surface, it is characterized in that, comprise the following steps:
[1] treat the workpiece surface that turns blue and carry out sanding and polishing and clean;
[2] laser is treated the workpiece surface that turns blue and is heated, and realizes turning blue process;
[3] scattered light signal of scattered light Monitoring systems Real-Time Monitoring workpiece surface to be turned blue, and compare with the turn blue relation of degree of the metallic surface scattered light signal obtained in advance and workpiece surface, realize the monitoring to the process of turning blue;
[4] opening and closing of laser apparatus are controlled according to the metallic surface scattered light signal of monitoring, the workpiece that turns blue required for acquisition.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109877118A (en) * | 2019-03-29 | 2019-06-14 | 华中科技大学 | A kind of laser metal surface decontamination or anti-rotten Rustproofing apparatus and method |
| CN112355481A (en) * | 2020-10-30 | 2021-02-12 | 广西壮族自治区特种设备检验研究院 | Steel part surface laser bluing treatment method |
| CN114622154A (en) * | 2022-01-26 | 2022-06-14 | 湖南力方轧辊有限公司 | Equipment and process for prefabricating oxide film on surface of hot roll through laser forming |
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| CN102242334A (en) * | 2011-07-06 | 2011-11-16 | 中国科学院上海技术物理研究所 | Processing method of local laser blackening for coating metalwork |
| CN102564929A (en) * | 2012-01-17 | 2012-07-11 | 南京理工大学 | High-flow dust particle counting sensor with novel photosensitive area structure |
| CN103076305A (en) * | 2012-12-28 | 2013-05-01 | 西北核技术研究所 | Device for measuring surface diffuse reflectivity of material |
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Patent Citations (3)
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|---|---|---|---|---|
| CN102242334A (en) * | 2011-07-06 | 2011-11-16 | 中国科学院上海技术物理研究所 | Processing method of local laser blackening for coating metalwork |
| CN102564929A (en) * | 2012-01-17 | 2012-07-11 | 南京理工大学 | High-flow dust particle counting sensor with novel photosensitive area structure |
| CN103076305A (en) * | 2012-12-28 | 2013-05-01 | 西北核技术研究所 | Device for measuring surface diffuse reflectivity of material |
Non-Patent Citations (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109877118A (en) * | 2019-03-29 | 2019-06-14 | 华中科技大学 | A kind of laser metal surface decontamination or anti-rotten Rustproofing apparatus and method |
| CN109877118B (en) * | 2019-03-29 | 2024-02-02 | 华中科技大学 | Laser metal surface decontamination or corrosion and rust prevention device and method |
| CN112355481A (en) * | 2020-10-30 | 2021-02-12 | 广西壮族自治区特种设备检验研究院 | Steel part surface laser bluing treatment method |
| CN114622154A (en) * | 2022-01-26 | 2022-06-14 | 湖南力方轧辊有限公司 | Equipment and process for prefabricating oxide film on surface of hot roll through laser forming |
| CN114622154B (en) * | 2022-01-26 | 2024-06-25 | 湖南力方轧辊有限公司 | Equipment and process for forming prefabricated oxide film on surface of hot roller by laser |
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