CN112067658A - Laser absorption rate measuring device for metal material changing with temperature - Google Patents
Laser absorption rate measuring device for metal material changing with temperature Download PDFInfo
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- CN112067658A CN112067658A CN202011080638.2A CN202011080638A CN112067658A CN 112067658 A CN112067658 A CN 112067658A CN 202011080638 A CN202011080638 A CN 202011080638A CN 112067658 A CN112067658 A CN 112067658A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4846—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4806—Details not adapted to a particular type of sample
- G01N25/4813—Details not adapted to a particular type of sample concerning the measuring means
- G01N25/482—Details not adapted to a particular type of sample concerning the measuring means concerning the temperature responsive elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4846—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample
- G01N25/4853—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4846—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample
- G01N25/4853—Details
- G01N25/486—Sample holders
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Abstract
The invention relates to the technical field of material detection, and discloses a laser absorptivity measuring device of a metal material changing along with temperature, which comprises a shell, a laser source, a laser emitting head, a laser beam, an infrared temperature measuring beam, and N2The laser light beam and the infrared temperature measuring light beam are respectively emitted into the light path cavity from the output end of the laser source and the output end of the infrared temperature measuring instrument, the light path cavity is internally provided with a beam combining mirror and a holophote, and the laser light beam and the infrared temperature measuring light beam are combined into a coaxial light beam through the beam combining mirror. This metal material is along with temperature variation's laser absorption rate measuring device can measure the absorption rate of metal material to laser under different temperatures, can avoid metal oxidation to the influence of absorptivity simultaneously, has improved measurement accuracy, and simple structure builds portably, easily realizes.
Description
Technical Field
The invention relates to the technical field of material detection, in particular to a laser absorption rate measuring device for a metal material along with temperature change.
Background
The absorptivity of a material to laser, particularly the absorptivity of the laser at different temperatures, is one of important indexes in the field of laser processing, and is a main influence factor influencing the performance of laser welding equipment, and the existing method for quantitatively measuring the laser absorptivity of the material comprises two types: the first is that the absorptivity of the material is reversely deduced according to the temperature rise condition of the material under the laser radiation condition; second, the absorbance is obtained by measuring the reflectance and subtracting the reflectance from 1.
At present, under the condition of heating materials by laser, the temperature of the materials can change to a certain extent, and the physical parameters of the materials can also change under different temperature conditions.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a laser absorption rate measuring device for a metal material changing along with temperature, which has the advantages of detecting the absorption rate of the metal material to laser at different temperatures and the like, solves the problems that the temperature of the material changes to a certain extent under the condition that the material is heated by laser, the physical parameters of the material also change under different temperature conditions, the existing measuring methods mainly measure the laser absorption rate of the material at normal temperature, the research on the laser absorption rate of the material at different temperatures is less, and the problem of material oxidation in the measurement is not solved.
(II) technical scheme
In order to achieve the purpose of detecting the laser absorption rate of the metal material at different temperatures, the invention provides the following technical scheme: a laser absorptivity measuring device of metal material changing with temperature,comprises a shell, a laser source, a laser emitting head, a laser beam, an infrared temperature measuring beam, and N2The laser temperature measuring device comprises a protection box and an infrared thermometer, wherein a light path cavity is formed in the shell, a laser source and the infrared thermometer are fixedly arranged on the right side of the upper end of the shell and the lower end of the right side wall of the shell respectively, a laser beam and an infrared temperature measuring beam are emitted into the light path cavity from the output end of the laser source and the output end of the infrared thermometer respectively, a beam combiner and a holophote are arranged in the light path cavity respectively, the laser beam and the infrared temperature measuring beam are combined into a coaxial beam through the beam combiner, the coaxial beam is emitted into a laser emitting head through the holophote, a laser focusing mirror is arranged in the laser emitting head, and the N is a positive integer2The upper end of the protection box is provided with a light inlet hole, and the coaxial light beams are emitted out through the laser focusing mirror and pass through the N2Light inlet hole of protective box vertically injects N2In the protection box, the coaxial light beams are aligned and arranged at N2The diameter of the metal material to be measured is the same as the diameters of the laser beam and the infrared temperature measuring beam, and N is2An opening is formed in the front side wall of the protection box, and a box door is rotatably connected to one side edge of the opening through a hinge.
Preferably, the beam combining mirror is arranged at an angle of 45 degrees with the incident direction of the laser beam and the infrared temperature measuring beam respectively, and the total reflection mirror and the beam combining mirror are arranged in parallel.
Preferably, said N is2The upper end of the left side wall and the lower end of the right side wall of the protection box are respectively and fixedly connected with an air inlet pipe and an air outlet pipe, and control valves are fixedly arranged in the air inlet pipe and the air outlet pipe.
Preferably, said N is2A plane mirror is fixedly arranged inside the light inlet of the protection box.
Preferably, said N is2The inside below left and right sides of guard box all is equipped with and presss from both sides tight piece, and the equal fixedly connected with slider of lower extreme of two tight pieces of clamp, N2Both ends all are seted up with slider assorted spout about the lower inside wall of guard box, N2The lower ends of the left side wall and the right side wall of the protection box are respectively in threaded connection with clamping bolts, and the rod walls of the two clamping bolts are respectively connected with the two clamping bolts through rolling bearingsThe side wall of the opposite side of each clamping block is rotatably connected.
Preferably, said N is2The lower extreme fixedly connected with of guard box supports the base, and supports the upper end right side fixedly connected with backup pad of base, the upper end of backup pad and the lower extreme right side fixed connection of shell.
Preferably, said N is2The lower inner side wall of the protection box is fixedly connected with a heat insulation pad corresponding to the position of a metal material to be detected, and the two clamping blocks are made of heat insulation materials.
(III) advantageous effects
Compared with the prior art, the invention provides a device for measuring the laser absorptivity of a metal material along with the change of temperature, which has the following beneficial effects:
1. the laser absorption rate measuring device of the metal material changing along with the temperature comprises a light path cavity, a laser source, a laser emitting head, a laser beam, an infrared temperature measuring beam, an infrared thermometer, a beam combining mirror, a total reflection mirror, a laser focusing mirror and an N2The mutual matching of the protection boxes can obtain the laser absorption rate of the metal material at different temperatures according to the detection result and through formula calculation.
2. The laser absorption rate measuring device of the metal material changing along with the temperature can measure N through the mutual matching of the arranged air inlet pipe, the air outlet pipe and the two control valves2The inside nitrogen gas that fills of guard box to avoid metal oxidation to influence measuring result's when measuring accurate nature, through two tight pieces of clamp and the mutually supporting of two clamp bolts that are equipped with, can treat that the detected material carries out the stability and presss from both sides tightly, avoid when measuring that metal material rocks the influence and measures.
Drawings
FIG. 1 is a schematic structural diagram of a laser absorption rate measuring device for measuring the variation of a metal material with temperature according to the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1 according to the present invention;
in the figure: 1. laser source 2, laser beam 3, infrared thermometer 4, infrared temperature measuring beam 5, beam combining mirror 6, laser emitting head 7, laser focusing mirror 8.N2Protective box9. The device comprises a metal material to be tested 10, a total reflection mirror 11, a light path cavity 12, an air inlet pipe 13, an air outlet pipe 14, a plane mirror 15, a clamping block 16, a clamping bolt 17, a supporting base 18, a supporting plate 19, a box door and a 20 heat insulation pad.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, a laser absorption rate measuring device for metal material varying with temperature includes a housing, a laser source 1, a laser emitting head 6, a laser beam 2, an infrared temperature measuring beam 4, N2A light path cavity 11 is arranged in the shell, the laser source 1 and the infrared thermometer 3 are respectively positioned on the right side of the upper end of the shell and the lower end of the right side wall of the shell and are fixedly arranged, the laser beam 2 and the infrared temperature measuring beam 4 are respectively emitted into the light path cavity 11 from the output end of the laser source 1 and the output end of the infrared thermometer 3, a beam combiner 5 and a holophote 10 are respectively arranged in the light path cavity 11, the laser beam 2 and the infrared temperature measuring beam 4 are combined into a coaxial beam through the beam combiner 5, the coaxial beam is emitted into the laser emitting head 6 through the holophote 10, a laser focusing mirror 7 and an N-type infrared temperature measuring mirror 7 are arranged in the laser emitting head 62The upper end of the protective box 8 is provided with a light inlet hole, and the coaxial light beam is emitted out through the laser focusing mirror 7 and passes through the N2The light inlet hole of the protective box 8 is vertically injected into N2In the protective box 8, the coaxial light beams are aligned and arranged at N2The diameter of the metal material 9 to be measured in the protective box 8 is the same as that of the laser beam 2 and the infrared temperature measuring beam 4, and N is2An opening is formed in the front side wall of the protection box 8, and a box door 19 is rotatably connected to one side edge of the opening through a hinge.
The beam combining mirror 5 is arranged at an angle of 45 degrees with the incident directions of the laser beam 2 and the infrared temperature measuring beam 4 respectively, and the total reflection mirror 10 is arranged in parallel with the beam combining mirror 5, so that the laser beam 2 and the light emitted by the infrared temperature measuring beam 4 can be kept coaxial.
N2An air inlet pipe 12 and an air outlet pipe 13 are respectively and fixedly connected to the upper end of the left side wall and the lower end of the right side wall of the protection box 8, control valves are fixedly arranged in the air inlet pipe 12 and the air outlet pipe 13, and metal materials to be tested are placed into the N2When the protection box 8 is inside, the air inlet pipe 12 and the air outlet pipe 13 are matched with each other to be capable of moving towards N2The protection box 8 is filled with nitrogen to prevent the metal material 9 to be measured from being oxidized to influence the absorption rate in the measurement process, and the measurement precision is improved.
N2The flat mirror 14 is fixedly arranged inside the light inlet of the protection box 8, so that nitrogen can be prevented from leaking from the light inlet.
N2The inside below left and right sides of guard box 8 all is equipped with and presss from both sides tight piece 15, and the equal fixedly connected with slider of lower extreme of two tight pieces 15 of clamp, N2Both ends all are seted up about the lower inside wall of guard box 8 with slider assorted spout, N2The lower ends of the left side wall and the right side wall of the protective box 8 are in threaded connection with clamping bolts 16, rod walls of the two clamping bolts 16 are respectively in rotating connection with the side walls on the opposite sides of the two clamping blocks 15 through rolling bearings, and metal materials to be measured are placed on the N side walls2When the protection box 8 is in use, the two clamping bolts 16 are screwed, so that the two clamping blocks 15 can move oppositely, and the metal material 9 to be measured can be stably clamped.
N2The lower extreme fixedly connected with of guard box 8 supports base 17, and supports base 17's upper end right side fixedly connected with backup pad 18, and the stability that whole device placed can be improved to the upper end of backup pad 18 and the lower extreme right side fixed connection of shell.
N2The lower inside wall fixedly connected with of guard box 8 and the corresponding heat insulating pad 20 in metal material 9 position that awaits measuring, two press from both sides tight piece 15 and be heat insulating material and make, can reduce the temperature of the metal material 9 that awaits measuring and give off, improve the accuracy that the temperature detected.
In summary, when the device is used, the box door 19 is opened, and the metal material 9 to be measured is put into the N2Inside the protective box 8, closing the box door 19 and passing through the inlet pipe 12 and the outlet pipe 13In cooperation with the use of an external inflation device pair N2The protection box 8 is filled with a proper amount of nitrogen, the laser source 1 emits laser to irradiate the metal material 9 to be measured, the infrared temperature measuring beam 4 and the infrared thermometer 3 sense the temperature of the metal material to be measured to obtain temperature change, and finally the laser absorption rate calculation formula is used
And (3) measuring the absorptivity of the metal material, (wherein A is the absorptivity, m is the quality of the sample piece to be measured, Cp is the specific heat melting of the sample piece to be measured, T is the temperature difference of the sample piece to be measured, P is the input power of the laser, and T is the heating time).
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A laser absorption rate measuring device of metal materials changing along with temperature comprises a shell, a laser source (1), a laser emitting head (6), a laser beam (2), an infrared temperature measuring beam (4) and N2The protection box (8) and the infrared thermometer (3) are characterized in that a light path cavity (11) is formed in the shell, the laser source (1) and the infrared thermometer (3) are respectively located on the right side of the upper end of the shell and the lower end of the right side wall of the shell and are fixedly arranged, and the laser beam (2) and the infrared temperature measuring beam (4) are respectively emitted from the laser beam (2)The output end of a source (1) and the output end of an infrared thermometer (3) are injected into a light path cavity (11), a beam combiner (5) and a total reflection mirror (10) are respectively arranged in the light path cavity (11), a laser beam (2) and an infrared temperature measuring beam (4) are combined into a coaxial beam through the beam combiner (5), the coaxial beam is injected into a laser injection head (6) through the total reflection mirror (10), a laser focusing mirror (7) is arranged in the laser injection head (6), and N is2The upper end of the protective box (8) is provided with a light inlet hole, and the coaxial light beams are emitted through the laser focusing lens (7) and emitted from the N2The light inlet hole of the protective box (8) is vertically injected into N2In the protective box (8), the coaxial light beam is aligned and arranged at N2The metal material (9) that awaits measuring in guard box (8), and the diameter of the metal material (9) that awaits measuring is the same with the diameter of laser beam (2) and infrared temperature measuring beam (4), N2An opening is arranged on the front side wall of the protection box (8), and a box door (19) is rotatably connected to one side edge of the opening through a hinge.
2. The device for measuring the laser absorptivity of a metal material varying with temperature according to claim 1, wherein the beam combiner (5) is arranged at an angle of 45 ° with the incident directions of the laser beam (2) and the infrared temperature measurement beam (4), respectively, and the total reflection mirror (10) is arranged in parallel with the beam combiner (5).
3. The apparatus of claim 1, wherein N is the absorption coefficient of a metal material with temperature2The upper end of the left side wall and the lower end of the right side wall of the protection box (8) are fixedly connected with an air inlet pipe (12) and an air outlet pipe (13) respectively, and control valves are fixedly arranged in the air inlet pipe (12) and the air outlet pipe (13).
4. The apparatus of claim 1, wherein N is the absorption coefficient of a metal material with temperature2A plane mirror (14) is fixedly arranged inside the light inlet of the protective box (8).
5. The method of claim 1 wherein the laser absorptance of the metallic material is measured with temperatureMeasuring device, characterized in that said N2The left side and the right side of the inner lower part of the protection box (8) are respectively provided with a clamping block (15), the lower ends of the two clamping blocks (15) are respectively fixedly connected with a sliding block, and N is2The lower inner side wall of the protection box (8) is provided with sliding grooves matched with the sliding blocks at the left end and the right end, and N is2The lower ends of the left side wall and the right side wall of the protection box (8) are in threaded connection with clamping bolts (16), and rod walls of the two clamping bolts (16) are respectively in rotating connection with the side walls on the opposite sides of the two clamping blocks (15) through rolling bearings.
6. The apparatus of claim 1, wherein N is the absorption coefficient of a metal material with temperature2The lower extreme fixedly connected with of guard box (8) supports base (17), and supports upper end right side fixedly connected with backup pad (18) of base (17), the upper end of backup pad (18) and the lower extreme right side fixed connection of shell.
7. The apparatus of claim 5, wherein N is the same as N2The lower inner side wall of the protection box (8) is fixedly connected with a heat insulation pad (20) corresponding to the position of the metal material (9) to be measured, and the two clamping blocks (15) are made of heat insulation materials.
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| CN202011080638.2A CN112067658A (en) | 2020-10-10 | 2020-10-10 | Laser absorption rate measuring device for metal material changing with temperature |
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| CN202011080638.2A CN112067658A (en) | 2020-10-10 | 2020-10-10 | Laser absorption rate measuring device for metal material changing with temperature |
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