CN202894592U - Laser welding non-contact temperature monitoring device - Google Patents
Laser welding non-contact temperature monitoring device Download PDFInfo
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- CN202894592U CN202894592U CN 201220474640 CN201220474640U CN202894592U CN 202894592 U CN202894592 U CN 202894592U CN 201220474640 CN201220474640 CN 201220474640 CN 201220474640 U CN201220474640 U CN 201220474640U CN 202894592 U CN202894592 U CN 202894592U
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Abstract
A laser welding non-contact temperature monitoring device comprises an optical output laser beam focus imaging part, a non-contact infrared temperature detection part, a charge coupled device (CCD) image monitoring part and a control unit, wherein laser beams with certain divergence angles are collimated and then changed into parallel beams by the optical output laser beam focus imaging part through a plurality of groups of lens, and the parallel beams are focused to one point through a lens at an output end of a lens cone after passing through two plain film double lenses. An infrared image reflected by a tested object is reflected to the non-contact infrared temperature detection part through one of the two plain film double lenses. A visible light part of a machined object is reflected to the CCD image monitoring part through the other plain film double lens. The control unit is used for controlling laser energy sent by a laser generator according to temperature, tested and obtained by the non-contact infrared temperature detection part of the tested object.
Description
Technical field
The utility model relates to a kind of device for monitoring temperature, particularly a kind of laser weld noncontact device for monitoring temperature.
Background technology
In laser beam welding, need to monitor and control the temperature of machined object.Some are arranged in the market for the product of Laser Processing monitoring temperature, such as low power laser head LH50, laser head LH500-M, monochromatic pyrometer EP60 and two-colour pyrometer QP003 etc.Wherein, the operation principle of low power laser head LH50 is laser probe will be measured object by laser beam splitter surface temperature, import laser probe into by wavelength and radiation intensity, it is signal digitalized that laser probe will import into, it is read, and the data of reading send to controller LASON and process; Laser head LH500-M carries out materials processing by laser, by the light beam device video camera and pyrometer is formed a branch of coaxial light beam, after the light beam focusing, material is welded, and the processing such as quenching are controlled by extraneous air or cooling fluid simultaneously; The numeral pyrometer is used for measuring temperature, by determining to measure the spacing ratio namely: the proportionate relationship of measuring distance and measurement point diameter, the radiation density of a wavelength of reception, thereby definite temperature of measuring.Some only can measure the temperature of object the said goods, and some can be processed simultaneously, measurement and monitoring, but also need to be by the external refrigeration source to the temperature control of machined object.
Summary of the invention
The utility model provides a kind of laser weld noncontact device for monitoring temperature for the problems referred to above of existing product, except the temperature that can monitor object to be processed, can also control the Laser output energy and make its temperature be no more than setting value.
The utility model realizes that the technical scheme of above-mentioned purpose is:
A kind of laser weld noncontact device for monitoring temperature comprises optical fiber Output of laser light beam focal imaging part, non-contact infrared temperature test section, ccd image monitor portion and control module; It is characterized in that: described optical fiber Output of laser light beam focal imaging part will become collimated light beam after the laser beam collimation of certain angle of divergence will be arranged by many arrangements of mirrors sheet, described collimated light beam by two plain film double lens sheets after output eyeglass by lens barrel focus on a bit; An infrared image with the measured object reflection in two plain film double lens sheets reflexes in the non-contact infrared temperature test section, and another visible light part with object to be processed in two plain film double lens sheets reflexes to the ccd image monitor portion; The laser energy that the measured object temperature control laser generator that described control module records according to the outer red temperature detection part of noncontact sends.
Further, the laser beam collimation that described optical fiber Output of laser light beam focal imaging part will be dispersed is three groups for the eyeglass of collimated light beam, is followed successively by from top to bottom convex lens, concavees lens and convex lens.
Further, the output eyeglass of lens barrel outside also comprises a protection eyeglass, and described protection eyeglass is by the dismountable camera lens front end that is installed on of buckle-type.
The infrared image of the measured object reflection that further, reflects in the described optical fiber Output of laser light beam focal imaging part passes through a mirror reflects in the infrared temp. control detector.
The visible light part of the object to be processed that further, reflects in the described optical fiber Output of laser light beam focal imaging part reflexes among the CCD by diaphragm, speculum and lens set.
More than device can comparatively accurate processing temperature with the laser object to be processed remain in a certain scope.Because the output of the energy of final laser calculates, thus less demanding to the detection frequency of temperature sensor, adjust the temperature control effect that laser instrument can reach but also can reach by real-time detection.Because less demanding to the detection frequency of temperature sensor, thereby reduced whole installation cost, very economical practicality.
Description of drawings
Fig. 1 is optical fiber Output of laser light beam focal imaging part schematic diagram;
Fig. 2 is noncontact infrared temperature test section schematic diagram;
Fig. 3 is ccd image monitor portion schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described.
A kind of laser weld noncontact device for monitoring temperature comprises optical fiber Output of laser light beam focal imaging part, non-contact infrared temperature test section, ccd image monitor portion and control module; The laser energy that the measured object temperature control laser generator that described control module records according to the outer red temperature detection part of noncontact sends.
Described optical fiber Output of laser light beam focal imaging part as shown in Figure 1, this optical focusing system is tried out in the laser beam of the optical fiber output of all numerical aperture 0.22NA.Its groundwork principle is as follows: the optical fiber output beam is by eyeglass 1,2,3, and eyeglass 1,2,3 is respectively convex lens, concavees lens and convex lens, and this lens set will have the laser beam of certain angle of divergence, and collimation becomes collimated light beam.Eyeglass 4, eyeglass 5 are two plain film double lens sheets, and by plating two-sided anti-reflection film, the parallel laser light beam of 99.99% behind the collimation can see through these two eyeglasses, and the characteristic of directional light is constant.Output eyeglass 6 by lens barrel focuses on 1 point with the parallel laser light beam at last.Eyeglass 7 is exit window mirror screening glass, is not subjected to extraneous dust and the pollution of spatter thing for the protection of eyeglass 6.Eyeglass 7 is that the buckle design is changed easily.Whole optical fiber output beam can form at distance eyeglass 745mm place a smallest spot by eyeglass 1-7.Its size is consistent with the fibre diameter of optical fiber output, becomes the 1:1 corresponding relation.
In some light path of Fig. 1 left side, it is exactly non-contact infrared temperature test section as shown in Figure 2, its function is mainly used in the infrared temperature-sensitive figure of measured object is imported in the infrared temp. control detector, detects the actual processing temperature that is lasered object by the infrared temp. control sensor.Eyeglass 5 can reflex to the left side with the infrared image of measured object reflection, and the infrared image that again reflects measured object by eyeglass 11 is sent in the infrared temp. control sensor, and sensor will export the Temperature numerical of the concrete measurement of signal indication of a 0-5V.
In some light path of Fig. 1 right side, be exactly ccd image monitor portion as shown in Figure 3, by eyeglass 4 visible light part of object to be processed is reflexed to the right side, by diaphragm 22, speculum 21 and lens set 23 visible light is imported among the CCD.Adopt the special-purpose black-white CCD of common monitoring, by the screen output of CCD, thereby signal is linked into monitoring object to be processed processing on real-time state in the monitor.
This device is equipped with can be according to the temperature acquisition signal, the control device that the Laser output energy is controlled, thus guarantee that object to be processed is controlled at a certain temperature.
Its operation principle is as follows: the control laser instrument is with less power irradiation object to be processed, and the temperature rise of record object to be processed by temperature value added and the time that obtains, calculates object to be processed and specifies hot spot to absorption and the temperature rise ability of laser; According to this temperature rise ability parameter, calculate the laser energy of actual needs according to processed assigned temperature setting value; After finishing, calculating according to result of calculation laser instrument output energy and time are controlled.
Claims (5)
1. a laser weld noncontact device for monitoring temperature comprises optical fiber Output of laser light beam focal imaging part, non-contact infrared temperature test section, ccd image monitor portion and control module; It is characterized in that: described optical fiber Output of laser light beam focal imaging part will become collimated light beam after the laser beam collimation of certain angle of divergence will be arranged by many arrangements of mirrors sheet, described collimated light beam by two plain film double lens sheets after output eyeglass by lens barrel focus on a bit; An infrared image with the measured object reflection in two plain film double lens sheets reflexes in the non-contact infrared temperature test section, and another visible light part with object to be processed in two plain film double lens sheets reflexes to the ccd image monitor portion; The laser energy that the measured object temperature control laser generator that described control module records according to the outer red temperature detection part of noncontact sends.
2. laser weld noncontact device for monitoring temperature according to claim 1, it is characterized in that: the laser beam collimation that described optical fiber Output of laser light beam focal imaging part will be dispersed is three groups for the eyeglass of collimated light beam, is followed successively by from top to bottom convex lens, concavees lens and convex lens.
3. laser weld noncontact device for monitoring temperature according to claim 1 is characterized in that: the output eyeglass outside of lens barrel also comprises a protection eyeglass, and described protection eyeglass is by the dismountable camera lens front end that is installed on of buckle-type.
4. laser weld noncontact device for monitoring temperature according to claim 1 is characterized in that: the infrared image of the measured object reflection that reflects in the described optical fiber Output of laser light beam focal imaging part by a mirror reflects in the infrared temp. control detector.
5. laser weld noncontact device for monitoring temperature according to claim 1 is characterized in that: the visible light part of the object to be processed that reflects in the described optical fiber Output of laser light beam focal imaging part reflexes among the CCD by diaphragm, speculum and lens set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474640 CN202894592U (en) | 2012-09-18 | 2012-09-18 | Laser welding non-contact temperature monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474640 CN202894592U (en) | 2012-09-18 | 2012-09-18 | Laser welding non-contact temperature monitoring device |
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| CN202894592U true CN202894592U (en) | 2013-04-24 |
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| CN 201220474640 Expired - Fee Related CN202894592U (en) | 2012-09-18 | 2012-09-18 | Laser welding non-contact temperature monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825385A (en) * | 2012-09-18 | 2012-12-19 | 张俊敏 | Non-contact temperature monitoring device for laser welding |
| CN109626847A (en) * | 2018-12-25 | 2019-04-16 | 大族激光科技产业集团股份有限公司 | A kind of OLED weld seam form monitoring method |
-
2012
- 2012-09-18 CN CN 201220474640 patent/CN202894592U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825385A (en) * | 2012-09-18 | 2012-12-19 | 张俊敏 | Non-contact temperature monitoring device for laser welding |
| CN102825385B (en) * | 2012-09-18 | 2015-04-29 | 张俊敏 | Non-contact temperature monitoring device for laser welding |
| CN109626847A (en) * | 2018-12-25 | 2019-04-16 | 大族激光科技产业集团股份有限公司 | A kind of OLED weld seam form monitoring method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20150918 |
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| EXPY | Termination of patent right or utility model |